1/*
2 * Synchronous PPP/Cisco/Frame Relay link level subroutines.
3 * Keepalive protocol implemented in both Cisco and PPP modes.
4 */
5/*-
6 * Copyright (C) 1994-2000 Cronyx Engineering.
7 * Author: Serge Vakulenko, <vak@cronyx.ru>
8 *
9 * Heavily revamped to conform to RFC 1661.
10 * Copyright (C) 1997, 2001 Joerg Wunsch.
11 *
12 * This software is distributed with NO WARRANTIES, not even the implied
13 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 *
15 * Authors grant any other persons or organisations permission to use
16 * or modify this software as long as this message is kept with the software,
17 * all derivative works or modified versions.
18 *
19 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997
20 *
| 1/*
2 * Synchronous PPP/Cisco/Frame Relay link level subroutines.
3 * Keepalive protocol implemented in both Cisco and PPP modes.
4 */
5/*-
6 * Copyright (C) 1994-2000 Cronyx Engineering.
7 * Author: Serge Vakulenko, <vak@cronyx.ru>
8 *
9 * Heavily revamped to conform to RFC 1661.
10 * Copyright (C) 1997, 2001 Joerg Wunsch.
11 *
12 * This software is distributed with NO WARRANTIES, not even the implied
13 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 *
15 * Authors grant any other persons or organisations permission to use
16 * or modify this software as long as this message is kept with the software,
17 * all derivative works or modified versions.
18 *
19 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997
20 *
|
21 * $FreeBSD: head/sys/net/if_spppsubr.c 241394 2012-10-10 08:36:38Z kevlo $
| 21 * $FreeBSD: head/sys/net/if_spppsubr.c 241686 2012-10-18 13:57:24Z andre $
|
22 */
23
24#include <sys/param.h>
25
26#include "opt_inet.h"
27#include "opt_inet6.h"
28#include "opt_ipx.h"
29
30#include <sys/systm.h>
31#include <sys/kernel.h>
32#include <sys/module.h>
33#include <sys/sockio.h>
34#include <sys/socket.h>
35#include <sys/syslog.h>
36#include <sys/random.h>
37#include <sys/malloc.h>
38#include <sys/mbuf.h>
39
40#include <sys/md5.h>
41
42#include <net/if.h>
43#include <net/netisr.h>
44#include <net/if_types.h>
45#include <net/route.h>
46#include <net/vnet.h>
47#include <netinet/in.h>
48#include <netinet/in_systm.h>
49#include <netinet/ip.h>
50#include <net/slcompress.h>
51
52#include <machine/stdarg.h>
53
54#include <netinet/in_var.h>
55
56#ifdef INET
57#include <netinet/ip.h>
58#include <netinet/tcp.h>
59#endif
60
61#ifdef INET6
62#include <netinet6/scope6_var.h>
63#endif
64
65#include <netinet/if_ether.h>
66
67#ifdef IPX
68#include <netipx/ipx.h>
69#include <netipx/ipx_if.h>
70#endif
71
72#include <net/if_sppp.h>
73
74#define IOCTL_CMD_T u_long
75#define MAXALIVECNT 3 /* max. alive packets */
76
77/*
78 * Interface flags that can be set in an ifconfig command.
79 *
80 * Setting link0 will make the link passive, i.e. it will be marked
81 * as being administrative openable, but won't be opened to begin
82 * with. Incoming calls will be answered, or subsequent calls with
83 * -link1 will cause the administrative open of the LCP layer.
84 *
85 * Setting link1 will cause the link to auto-dial only as packets
86 * arrive to be sent.
87 *
88 * Setting IFF_DEBUG will syslog the option negotiation and state
89 * transitions at level kern.debug. Note: all logs consistently look
90 * like
91 *
92 * <if-name><unit>: <proto-name> <additional info...>
93 *
94 * with <if-name><unit> being something like "bppp0", and <proto-name>
95 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
96 */
97
98#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
99#define IFF_AUTO IFF_LINK1 /* auto-dial on output */
100#define IFF_CISCO IFF_LINK2 /* auto-dial on output */
101
102#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
103#define PPP_UI 0x03 /* Unnumbered Information */
104#define PPP_IP 0x0021 /* Internet Protocol */
105#define PPP_ISO 0x0023 /* ISO OSI Protocol */
106#define PPP_XNS 0x0025 /* Xerox NS Protocol */
107#define PPP_IPX 0x002b /* Novell IPX Protocol */
108#define PPP_VJ_COMP 0x002d /* VJ compressed TCP/IP */
109#define PPP_VJ_UCOMP 0x002f /* VJ uncompressed TCP/IP */
110#define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */
111#define PPP_LCP 0xc021 /* Link Control Protocol */
112#define PPP_PAP 0xc023 /* Password Authentication Protocol */
113#define PPP_CHAP 0xc223 /* Challenge-Handshake Auth Protocol */
114#define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */
115#define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
116
117#define CONF_REQ 1 /* PPP configure request */
118#define CONF_ACK 2 /* PPP configure acknowledge */
119#define CONF_NAK 3 /* PPP configure negative ack */
120#define CONF_REJ 4 /* PPP configure reject */
121#define TERM_REQ 5 /* PPP terminate request */
122#define TERM_ACK 6 /* PPP terminate acknowledge */
123#define CODE_REJ 7 /* PPP code reject */
124#define PROTO_REJ 8 /* PPP protocol reject */
125#define ECHO_REQ 9 /* PPP echo request */
126#define ECHO_REPLY 10 /* PPP echo reply */
127#define DISC_REQ 11 /* PPP discard request */
128
129#define LCP_OPT_MRU 1 /* maximum receive unit */
130#define LCP_OPT_ASYNC_MAP 2 /* async control character map */
131#define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */
132#define LCP_OPT_QUAL_PROTO 4 /* quality protocol */
133#define LCP_OPT_MAGIC 5 /* magic number */
134#define LCP_OPT_RESERVED 6 /* reserved */
135#define LCP_OPT_PROTO_COMP 7 /* protocol field compression */
136#define LCP_OPT_ADDR_COMP 8 /* address/control field compression */
137
138#define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */
139#define IPCP_OPT_COMPRESSION 2 /* IP compression protocol (VJ) */
140#define IPCP_OPT_ADDRESS 3 /* local IP address */
141
142#define IPV6CP_OPT_IFID 1 /* interface identifier */
143#define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */
144
145#define IPCP_COMP_VJ 0x2d /* Code for VJ compression */
146
147#define PAP_REQ 1 /* PAP name/password request */
148#define PAP_ACK 2 /* PAP acknowledge */
149#define PAP_NAK 3 /* PAP fail */
150
151#define CHAP_CHALLENGE 1 /* CHAP challenge request */
152#define CHAP_RESPONSE 2 /* CHAP challenge response */
153#define CHAP_SUCCESS 3 /* CHAP response ok */
154#define CHAP_FAILURE 4 /* CHAP response failed */
155
156#define CHAP_MD5 5 /* hash algorithm - MD5 */
157
158#define CISCO_MULTICAST 0x8f /* Cisco multicast address */
159#define CISCO_UNICAST 0x0f /* Cisco unicast address */
160#define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
161#define CISCO_ADDR_REQ 0 /* Cisco address request */
162#define CISCO_ADDR_REPLY 1 /* Cisco address reply */
163#define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
164
165/* states are named and numbered according to RFC 1661 */
166#define STATE_INITIAL 0
167#define STATE_STARTING 1
168#define STATE_CLOSED 2
169#define STATE_STOPPED 3
170#define STATE_CLOSING 4
171#define STATE_STOPPING 5
172#define STATE_REQ_SENT 6
173#define STATE_ACK_RCVD 7
174#define STATE_ACK_SENT 8
175#define STATE_OPENED 9
176
177static MALLOC_DEFINE(M_SPPP, "sppp", "synchronous PPP interface internals");
178
179struct ppp_header {
180 u_char address;
181 u_char control;
182 u_short protocol;
183} __packed;
184#define PPP_HEADER_LEN sizeof (struct ppp_header)
185
186struct lcp_header {
187 u_char type;
188 u_char ident;
189 u_short len;
190} __packed;
191#define LCP_HEADER_LEN sizeof (struct lcp_header)
192
193struct cisco_packet {
194 u_long type;
195 u_long par1;
196 u_long par2;
197 u_short rel;
198 u_short time0;
199 u_short time1;
200} __packed;
201#define CISCO_PACKET_LEN sizeof (struct cisco_packet)
202
203/*
204 * We follow the spelling and capitalization of RFC 1661 here, to make
205 * it easier comparing with the standard. Please refer to this RFC in
206 * case you can't make sense out of these abbreviation; it will also
207 * explain the semantics related to the various events and actions.
208 */
209struct cp {
210 u_short proto; /* PPP control protocol number */
211 u_char protoidx; /* index into state table in struct sppp */
212 u_char flags;
213#define CP_LCP 0x01 /* this is the LCP */
214#define CP_AUTH 0x02 /* this is an authentication protocol */
215#define CP_NCP 0x04 /* this is a NCP */
216#define CP_QUAL 0x08 /* this is a quality reporting protocol */
217 const char *name; /* name of this control protocol */
218 /* event handlers */
219 void (*Up)(struct sppp *sp);
220 void (*Down)(struct sppp *sp);
221 void (*Open)(struct sppp *sp);
222 void (*Close)(struct sppp *sp);
223 void (*TO)(void *sp);
224 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len);
225 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len);
226 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len);
227 /* actions */
228 void (*tlu)(struct sppp *sp);
229 void (*tld)(struct sppp *sp);
230 void (*tls)(struct sppp *sp);
231 void (*tlf)(struct sppp *sp);
232 void (*scr)(struct sppp *sp);
233};
234
235#define SPP_FMT "%s: "
236#define SPP_ARGS(ifp) (ifp)->if_xname
237
238#define SPPP_LOCK(sp) mtx_lock (&(sp)->mtx)
239#define SPPP_UNLOCK(sp) mtx_unlock (&(sp)->mtx)
240#define SPPP_LOCK_ASSERT(sp) mtx_assert (&(sp)->mtx, MA_OWNED)
241#define SPPP_LOCK_OWNED(sp) mtx_owned (&(sp)->mtx)
242
243#ifdef INET
244/*
245 * The following disgusting hack gets around the problem that IP TOS
246 * can't be set yet. We want to put "interactive" traffic on a high
247 * priority queue. To decide if traffic is interactive, we check that
248 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
249 *
250 * XXX is this really still necessary? - joerg -
251 */
252static const u_short interactive_ports[8] = {
253 0, 513, 0, 0,
254 0, 21, 0, 23,
255};
256#define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
257#endif
258
259/* almost every function needs these */
260#define STDDCL \
261 struct ifnet *ifp = SP2IFP(sp); \
262 int debug = ifp->if_flags & IFF_DEBUG
263
264static int sppp_output(struct ifnet *ifp, struct mbuf *m,
265 struct sockaddr *dst, struct route *ro);
266
267static void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2);
268static void sppp_cisco_input(struct sppp *sp, struct mbuf *m);
269
270static void sppp_cp_input(const struct cp *cp, struct sppp *sp,
271 struct mbuf *m);
272static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
273 u_char ident, u_short len, void *data);
274/* static void sppp_cp_timeout(void *arg); */
275static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp,
276 int newstate);
277static void sppp_auth_send(const struct cp *cp,
278 struct sppp *sp, unsigned int type, unsigned int id,
279 ...);
280
281static void sppp_up_event(const struct cp *cp, struct sppp *sp);
282static void sppp_down_event(const struct cp *cp, struct sppp *sp);
283static void sppp_open_event(const struct cp *cp, struct sppp *sp);
284static void sppp_close_event(const struct cp *cp, struct sppp *sp);
285static void sppp_to_event(const struct cp *cp, struct sppp *sp);
286
287static void sppp_null(struct sppp *sp);
288
289static void sppp_pp_up(struct sppp *sp);
290static void sppp_pp_down(struct sppp *sp);
291
292static void sppp_lcp_init(struct sppp *sp);
293static void sppp_lcp_up(struct sppp *sp);
294static void sppp_lcp_down(struct sppp *sp);
295static void sppp_lcp_open(struct sppp *sp);
296static void sppp_lcp_close(struct sppp *sp);
297static void sppp_lcp_TO(void *sp);
298static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
299static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
300static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
301static void sppp_lcp_tlu(struct sppp *sp);
302static void sppp_lcp_tld(struct sppp *sp);
303static void sppp_lcp_tls(struct sppp *sp);
304static void sppp_lcp_tlf(struct sppp *sp);
305static void sppp_lcp_scr(struct sppp *sp);
306static void sppp_lcp_check_and_close(struct sppp *sp);
307static int sppp_ncp_check(struct sppp *sp);
308
309static void sppp_ipcp_init(struct sppp *sp);
310static void sppp_ipcp_up(struct sppp *sp);
311static void sppp_ipcp_down(struct sppp *sp);
312static void sppp_ipcp_open(struct sppp *sp);
313static void sppp_ipcp_close(struct sppp *sp);
314static void sppp_ipcp_TO(void *sp);
315static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
316static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
317static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
318static void sppp_ipcp_tlu(struct sppp *sp);
319static void sppp_ipcp_tld(struct sppp *sp);
320static void sppp_ipcp_tls(struct sppp *sp);
321static void sppp_ipcp_tlf(struct sppp *sp);
322static void sppp_ipcp_scr(struct sppp *sp);
323
324static void sppp_ipv6cp_init(struct sppp *sp);
325static void sppp_ipv6cp_up(struct sppp *sp);
326static void sppp_ipv6cp_down(struct sppp *sp);
327static void sppp_ipv6cp_open(struct sppp *sp);
328static void sppp_ipv6cp_close(struct sppp *sp);
329static void sppp_ipv6cp_TO(void *sp);
330static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len);
331static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
332static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
333static void sppp_ipv6cp_tlu(struct sppp *sp);
334static void sppp_ipv6cp_tld(struct sppp *sp);
335static void sppp_ipv6cp_tls(struct sppp *sp);
336static void sppp_ipv6cp_tlf(struct sppp *sp);
337static void sppp_ipv6cp_scr(struct sppp *sp);
338
339static void sppp_pap_input(struct sppp *sp, struct mbuf *m);
340static void sppp_pap_init(struct sppp *sp);
341static void sppp_pap_open(struct sppp *sp);
342static void sppp_pap_close(struct sppp *sp);
343static void sppp_pap_TO(void *sp);
344static void sppp_pap_my_TO(void *sp);
345static void sppp_pap_tlu(struct sppp *sp);
346static void sppp_pap_tld(struct sppp *sp);
347static void sppp_pap_scr(struct sppp *sp);
348
349static void sppp_chap_input(struct sppp *sp, struct mbuf *m);
350static void sppp_chap_init(struct sppp *sp);
351static void sppp_chap_open(struct sppp *sp);
352static void sppp_chap_close(struct sppp *sp);
353static void sppp_chap_TO(void *sp);
354static void sppp_chap_tlu(struct sppp *sp);
355static void sppp_chap_tld(struct sppp *sp);
356static void sppp_chap_scr(struct sppp *sp);
357
358static const char *sppp_auth_type_name(u_short proto, u_char type);
359static const char *sppp_cp_type_name(u_char type);
360#ifdef INET
361static const char *sppp_dotted_quad(u_long addr);
362static const char *sppp_ipcp_opt_name(u_char opt);
363#endif
364#ifdef INET6
365static const char *sppp_ipv6cp_opt_name(u_char opt);
366#endif
367static const char *sppp_lcp_opt_name(u_char opt);
368static const char *sppp_phase_name(enum ppp_phase phase);
369static const char *sppp_proto_name(u_short proto);
370static const char *sppp_state_name(int state);
371static int sppp_params(struct sppp *sp, u_long cmd, void *data);
372static int sppp_strnlen(u_char *p, int max);
373static void sppp_keepalive(void *dummy);
374static void sppp_phase_network(struct sppp *sp);
375static void sppp_print_bytes(const u_char *p, u_short len);
376static void sppp_print_string(const char *p, u_short len);
377static void sppp_qflush(struct ifqueue *ifq);
378#ifdef INET
379static void sppp_set_ip_addr(struct sppp *sp, u_long src);
380#endif
381#ifdef INET6
382static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src,
383 struct in6_addr *dst, struct in6_addr *srcmask);
384#ifdef IPV6CP_MYIFID_DYN
385static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src);
386static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src);
387#endif
388static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src);
389#endif
390
391/* if_start () wrapper */
392static void sppp_ifstart (struct ifnet *ifp);
393
394/* our control protocol descriptors */
395static const struct cp lcp = {
396 PPP_LCP, IDX_LCP, CP_LCP, "lcp",
397 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close,
398 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak,
399 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf,
400 sppp_lcp_scr
401};
402
403static const struct cp ipcp = {
404 PPP_IPCP, IDX_IPCP,
405#ifdef INET /* don't run IPCP if there's no IPv4 support */
406 CP_NCP,
407#else
408 0,
409#endif
410 "ipcp",
411 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close,
412 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak,
413 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf,
414 sppp_ipcp_scr
415};
416
417static const struct cp ipv6cp = {
418 PPP_IPV6CP, IDX_IPV6CP,
419#ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/
420 CP_NCP,
421#else
422 0,
423#endif
424 "ipv6cp",
425 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close,
426 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak,
427 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf,
428 sppp_ipv6cp_scr
429};
430
431static const struct cp pap = {
432 PPP_PAP, IDX_PAP, CP_AUTH, "pap",
433 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close,
434 sppp_pap_TO, 0, 0, 0,
435 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null,
436 sppp_pap_scr
437};
438
439static const struct cp chap = {
440 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap",
441 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close,
442 sppp_chap_TO, 0, 0, 0,
443 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null,
444 sppp_chap_scr
445};
446
447static const struct cp *cps[IDX_COUNT] = {
448 &lcp, /* IDX_LCP */
449 &ipcp, /* IDX_IPCP */
450 &ipv6cp, /* IDX_IPV6CP */
451 &pap, /* IDX_PAP */
452 &chap, /* IDX_CHAP */
453};
454
455static void*
456sppp_alloc(u_char type, struct ifnet *ifp)
457{
458 struct sppp *sp;
459
460 sp = malloc(sizeof(struct sppp), M_SPPP, M_WAITOK | M_ZERO);
461 sp->pp_ifp = ifp;
462
463 return (sp);
464}
465
466static void
467sppp_free(void *com, u_char type)
468{
469
470 free(com, M_SPPP);
471}
472
473static int
474sppp_modevent(module_t mod, int type, void *unused)
475{
476 switch (type) {
477 case MOD_LOAD:
478 /*
479 * XXX: should probably be IFT_SPPP, but it's fairly
480 * harmless to allocate struct sppp's for non-sppp
481 * interfaces.
482 */
483
484 if_register_com_alloc(IFT_PPP, sppp_alloc, sppp_free);
485 break;
486 case MOD_UNLOAD:
487 /* if_deregister_com_alloc(IFT_PPP); */
488 return EACCES;
489 default:
490 return EOPNOTSUPP;
491 }
492 return 0;
493}
494static moduledata_t spppmod = {
495 "sppp",
496 sppp_modevent,
497 0
498};
499MODULE_VERSION(sppp, 1);
500DECLARE_MODULE(sppp, spppmod, SI_SUB_DRIVERS, SI_ORDER_ANY);
501
502/*
503 * Exported functions, comprising our interface to the lower layer.
504 */
505
506/*
507 * Process the received packet.
508 */
509void
510sppp_input(struct ifnet *ifp, struct mbuf *m)
511{
512 struct ppp_header *h;
513 int isr = -1;
514 struct sppp *sp = IFP2SP(ifp);
515 int debug, do_account = 0;
516#ifdef INET
517 int hlen, vjlen;
518 u_char *iphdr;
519#endif
520
521 SPPP_LOCK(sp);
522 debug = ifp->if_flags & IFF_DEBUG;
523
524 if (ifp->if_flags & IFF_UP)
525 /* Count received bytes, add FCS and one flag */
526 ifp->if_ibytes += m->m_pkthdr.len + 3;
527
528 if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
529 /* Too small packet, drop it. */
530 if (debug)
531 log(LOG_DEBUG,
532 SPP_FMT "input packet is too small, %d bytes\n",
533 SPP_ARGS(ifp), m->m_pkthdr.len);
534 drop:
535 m_freem (m);
536 SPPP_UNLOCK(sp);
537 drop2:
538 ++ifp->if_ierrors;
539 ++ifp->if_iqdrops;
540 return;
541 }
542
543 if (sp->pp_mode == PP_FR) {
544 sppp_fr_input (sp, m);
545 SPPP_UNLOCK(sp);
546 return;
547 }
548
549 /* Get PPP header. */
550 h = mtod (m, struct ppp_header*);
551 m_adj (m, PPP_HEADER_LEN);
552
553 switch (h->address) {
554 case PPP_ALLSTATIONS:
555 if (h->control != PPP_UI)
556 goto invalid;
557 if (sp->pp_mode == IFF_CISCO) {
558 if (debug)
559 log(LOG_DEBUG,
560 SPP_FMT "PPP packet in Cisco mode "
561 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
562 SPP_ARGS(ifp),
563 h->address, h->control, ntohs(h->protocol));
564 goto drop;
565 }
566 switch (ntohs (h->protocol)) {
567 default:
568 if (debug)
569 log(LOG_DEBUG,
570 SPP_FMT "rejecting protocol "
571 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
572 SPP_ARGS(ifp),
573 h->address, h->control, ntohs(h->protocol));
574 if (sp->state[IDX_LCP] == STATE_OPENED)
575 sppp_cp_send (sp, PPP_LCP, PROTO_REJ,
576 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2,
577 &h->protocol);
578 ++ifp->if_noproto;
579 goto drop;
580 case PPP_LCP:
581 sppp_cp_input(&lcp, sp, m);
582 m_freem (m);
583 SPPP_UNLOCK(sp);
584 return;
585 case PPP_PAP:
586 if (sp->pp_phase >= PHASE_AUTHENTICATE)
587 sppp_pap_input(sp, m);
588 m_freem (m);
589 SPPP_UNLOCK(sp);
590 return;
591 case PPP_CHAP:
592 if (sp->pp_phase >= PHASE_AUTHENTICATE)
593 sppp_chap_input(sp, m);
594 m_freem (m);
595 SPPP_UNLOCK(sp);
596 return;
597#ifdef INET
598 case PPP_IPCP:
599 if (sp->pp_phase == PHASE_NETWORK)
600 sppp_cp_input(&ipcp, sp, m);
601 m_freem (m);
602 SPPP_UNLOCK(sp);
603 return;
604 case PPP_IP:
605 if (sp->state[IDX_IPCP] == STATE_OPENED) {
606 isr = NETISR_IP;
607 }
608 do_account++;
609 break;
610 case PPP_VJ_COMP:
611 if (sp->state[IDX_IPCP] == STATE_OPENED) {
612 if ((vjlen =
613 sl_uncompress_tcp_core(mtod(m, u_char *),
614 m->m_len, m->m_len,
615 TYPE_COMPRESSED_TCP,
616 sp->pp_comp,
617 &iphdr, &hlen)) <= 0) {
618 if (debug)
619 log(LOG_INFO,
620 SPP_FMT "VJ uncompress failed on compressed packet\n",
621 SPP_ARGS(ifp));
622 goto drop;
623 }
624
625 /*
626 * Trim the VJ header off the packet, and prepend
627 * the uncompressed IP header (which will usually
628 * end up in two chained mbufs since there's not
629 * enough leading space in the existing mbuf).
630 */
631 m_adj(m, vjlen);
632 M_PREPEND(m, hlen, M_DONTWAIT);
633 if (m == NULL) {
634 SPPP_UNLOCK(sp);
635 goto drop2;
636 }
637 bcopy(iphdr, mtod(m, u_char *), hlen);
638 isr = NETISR_IP;
639 }
640 do_account++;
641 break;
642 case PPP_VJ_UCOMP:
643 if (sp->state[IDX_IPCP] == STATE_OPENED) {
644 if (sl_uncompress_tcp_core(mtod(m, u_char *),
645 m->m_len, m->m_len,
646 TYPE_UNCOMPRESSED_TCP,
647 sp->pp_comp,
648 &iphdr, &hlen) != 0) {
649 if (debug)
650 log(LOG_INFO,
651 SPP_FMT "VJ uncompress failed on uncompressed packet\n",
652 SPP_ARGS(ifp));
653 goto drop;
654 }
655 isr = NETISR_IP;
656 }
657 do_account++;
658 break;
659#endif
660#ifdef INET6
661 case PPP_IPV6CP:
662 if (sp->pp_phase == PHASE_NETWORK)
663 sppp_cp_input(&ipv6cp, sp, m);
664 m_freem (m);
665 SPPP_UNLOCK(sp);
666 return;
667
668 case PPP_IPV6:
669 if (sp->state[IDX_IPV6CP] == STATE_OPENED)
670 isr = NETISR_IPV6;
671 do_account++;
672 break;
673#endif
674#ifdef IPX
675 case PPP_IPX:
676 /* IPX IPXCP not implemented yet */
677 if (sp->pp_phase == PHASE_NETWORK)
678 isr = NETISR_IPX;
679 do_account++;
680 break;
681#endif
682 }
683 break;
684 case CISCO_MULTICAST:
685 case CISCO_UNICAST:
686 /* Don't check the control field here (RFC 1547). */
687 if (sp->pp_mode != IFF_CISCO) {
688 if (debug)
689 log(LOG_DEBUG,
690 SPP_FMT "Cisco packet in PPP mode "
691 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
692 SPP_ARGS(ifp),
693 h->address, h->control, ntohs(h->protocol));
694 goto drop;
695 }
696 switch (ntohs (h->protocol)) {
697 default:
698 ++ifp->if_noproto;
699 goto invalid;
700 case CISCO_KEEPALIVE:
701 sppp_cisco_input (sp, m);
702 m_freem (m);
703 SPPP_UNLOCK(sp);
704 return;
705#ifdef INET
706 case ETHERTYPE_IP:
707 isr = NETISR_IP;
708 do_account++;
709 break;
710#endif
711#ifdef INET6
712 case ETHERTYPE_IPV6:
713 isr = NETISR_IPV6;
714 do_account++;
715 break;
716#endif
717#ifdef IPX
718 case ETHERTYPE_IPX:
719 isr = NETISR_IPX;
720 do_account++;
721 break;
722#endif
723 }
724 break;
725 default: /* Invalid PPP packet. */
726 invalid:
727 if (debug)
728 log(LOG_DEBUG,
729 SPP_FMT "invalid input packet "
730 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
731 SPP_ARGS(ifp),
732 h->address, h->control, ntohs(h->protocol));
733 goto drop;
734 }
735
736 if (! (ifp->if_flags & IFF_UP) || isr == -1)
737 goto drop;
738
739 SPPP_UNLOCK(sp);
740 M_SETFIB(m, ifp->if_fib);
741 /* Check queue. */
742 if (netisr_queue(isr, m)) { /* (0) on success. */
743 if (debug)
744 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n",
745 SPP_ARGS(ifp));
746 goto drop2;
747 }
748
749 if (do_account)
750 /*
751 * Do only account for network packets, not for control
752 * packets. This is used by some subsystems to detect
753 * idle lines.
754 */
755 sp->pp_last_recv = time_uptime;
756}
757
758static void
759sppp_ifstart_sched(void *dummy)
760{
761 struct sppp *sp = dummy;
762
763 sp->if_start(SP2IFP(sp));
764}
765
766/* if_start () wrapper function. We use it to schedule real if_start () for
767 * execution. We can't call it directly
768 */
769static void
770sppp_ifstart(struct ifnet *ifp)
771{
772 struct sppp *sp = IFP2SP(ifp);
773
774 if (SPPP_LOCK_OWNED(sp)) {
775 if (callout_pending(&sp->ifstart_callout))
776 return;
777 callout_reset(&sp->ifstart_callout, 1, sppp_ifstart_sched,
778 (void *)sp);
779 } else {
780 sp->if_start(ifp);
781 }
782}
783
784/*
785 * Enqueue transmit packet.
786 */
787static int
788sppp_output(struct ifnet *ifp, struct mbuf *m,
789 struct sockaddr *dst, struct route *ro)
790{
791 struct sppp *sp = IFP2SP(ifp);
792 struct ppp_header *h;
793 struct ifqueue *ifq = NULL;
| 22 */
23
24#include <sys/param.h>
25
26#include "opt_inet.h"
27#include "opt_inet6.h"
28#include "opt_ipx.h"
29
30#include <sys/systm.h>
31#include <sys/kernel.h>
32#include <sys/module.h>
33#include <sys/sockio.h>
34#include <sys/socket.h>
35#include <sys/syslog.h>
36#include <sys/random.h>
37#include <sys/malloc.h>
38#include <sys/mbuf.h>
39
40#include <sys/md5.h>
41
42#include <net/if.h>
43#include <net/netisr.h>
44#include <net/if_types.h>
45#include <net/route.h>
46#include <net/vnet.h>
47#include <netinet/in.h>
48#include <netinet/in_systm.h>
49#include <netinet/ip.h>
50#include <net/slcompress.h>
51
52#include <machine/stdarg.h>
53
54#include <netinet/in_var.h>
55
56#ifdef INET
57#include <netinet/ip.h>
58#include <netinet/tcp.h>
59#endif
60
61#ifdef INET6
62#include <netinet6/scope6_var.h>
63#endif
64
65#include <netinet/if_ether.h>
66
67#ifdef IPX
68#include <netipx/ipx.h>
69#include <netipx/ipx_if.h>
70#endif
71
72#include <net/if_sppp.h>
73
74#define IOCTL_CMD_T u_long
75#define MAXALIVECNT 3 /* max. alive packets */
76
77/*
78 * Interface flags that can be set in an ifconfig command.
79 *
80 * Setting link0 will make the link passive, i.e. it will be marked
81 * as being administrative openable, but won't be opened to begin
82 * with. Incoming calls will be answered, or subsequent calls with
83 * -link1 will cause the administrative open of the LCP layer.
84 *
85 * Setting link1 will cause the link to auto-dial only as packets
86 * arrive to be sent.
87 *
88 * Setting IFF_DEBUG will syslog the option negotiation and state
89 * transitions at level kern.debug. Note: all logs consistently look
90 * like
91 *
92 * <if-name><unit>: <proto-name> <additional info...>
93 *
94 * with <if-name><unit> being something like "bppp0", and <proto-name>
95 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
96 */
97
98#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
99#define IFF_AUTO IFF_LINK1 /* auto-dial on output */
100#define IFF_CISCO IFF_LINK2 /* auto-dial on output */
101
102#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
103#define PPP_UI 0x03 /* Unnumbered Information */
104#define PPP_IP 0x0021 /* Internet Protocol */
105#define PPP_ISO 0x0023 /* ISO OSI Protocol */
106#define PPP_XNS 0x0025 /* Xerox NS Protocol */
107#define PPP_IPX 0x002b /* Novell IPX Protocol */
108#define PPP_VJ_COMP 0x002d /* VJ compressed TCP/IP */
109#define PPP_VJ_UCOMP 0x002f /* VJ uncompressed TCP/IP */
110#define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */
111#define PPP_LCP 0xc021 /* Link Control Protocol */
112#define PPP_PAP 0xc023 /* Password Authentication Protocol */
113#define PPP_CHAP 0xc223 /* Challenge-Handshake Auth Protocol */
114#define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */
115#define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
116
117#define CONF_REQ 1 /* PPP configure request */
118#define CONF_ACK 2 /* PPP configure acknowledge */
119#define CONF_NAK 3 /* PPP configure negative ack */
120#define CONF_REJ 4 /* PPP configure reject */
121#define TERM_REQ 5 /* PPP terminate request */
122#define TERM_ACK 6 /* PPP terminate acknowledge */
123#define CODE_REJ 7 /* PPP code reject */
124#define PROTO_REJ 8 /* PPP protocol reject */
125#define ECHO_REQ 9 /* PPP echo request */
126#define ECHO_REPLY 10 /* PPP echo reply */
127#define DISC_REQ 11 /* PPP discard request */
128
129#define LCP_OPT_MRU 1 /* maximum receive unit */
130#define LCP_OPT_ASYNC_MAP 2 /* async control character map */
131#define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */
132#define LCP_OPT_QUAL_PROTO 4 /* quality protocol */
133#define LCP_OPT_MAGIC 5 /* magic number */
134#define LCP_OPT_RESERVED 6 /* reserved */
135#define LCP_OPT_PROTO_COMP 7 /* protocol field compression */
136#define LCP_OPT_ADDR_COMP 8 /* address/control field compression */
137
138#define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */
139#define IPCP_OPT_COMPRESSION 2 /* IP compression protocol (VJ) */
140#define IPCP_OPT_ADDRESS 3 /* local IP address */
141
142#define IPV6CP_OPT_IFID 1 /* interface identifier */
143#define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */
144
145#define IPCP_COMP_VJ 0x2d /* Code for VJ compression */
146
147#define PAP_REQ 1 /* PAP name/password request */
148#define PAP_ACK 2 /* PAP acknowledge */
149#define PAP_NAK 3 /* PAP fail */
150
151#define CHAP_CHALLENGE 1 /* CHAP challenge request */
152#define CHAP_RESPONSE 2 /* CHAP challenge response */
153#define CHAP_SUCCESS 3 /* CHAP response ok */
154#define CHAP_FAILURE 4 /* CHAP response failed */
155
156#define CHAP_MD5 5 /* hash algorithm - MD5 */
157
158#define CISCO_MULTICAST 0x8f /* Cisco multicast address */
159#define CISCO_UNICAST 0x0f /* Cisco unicast address */
160#define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
161#define CISCO_ADDR_REQ 0 /* Cisco address request */
162#define CISCO_ADDR_REPLY 1 /* Cisco address reply */
163#define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
164
165/* states are named and numbered according to RFC 1661 */
166#define STATE_INITIAL 0
167#define STATE_STARTING 1
168#define STATE_CLOSED 2
169#define STATE_STOPPED 3
170#define STATE_CLOSING 4
171#define STATE_STOPPING 5
172#define STATE_REQ_SENT 6
173#define STATE_ACK_RCVD 7
174#define STATE_ACK_SENT 8
175#define STATE_OPENED 9
176
177static MALLOC_DEFINE(M_SPPP, "sppp", "synchronous PPP interface internals");
178
179struct ppp_header {
180 u_char address;
181 u_char control;
182 u_short protocol;
183} __packed;
184#define PPP_HEADER_LEN sizeof (struct ppp_header)
185
186struct lcp_header {
187 u_char type;
188 u_char ident;
189 u_short len;
190} __packed;
191#define LCP_HEADER_LEN sizeof (struct lcp_header)
192
193struct cisco_packet {
194 u_long type;
195 u_long par1;
196 u_long par2;
197 u_short rel;
198 u_short time0;
199 u_short time1;
200} __packed;
201#define CISCO_PACKET_LEN sizeof (struct cisco_packet)
202
203/*
204 * We follow the spelling and capitalization of RFC 1661 here, to make
205 * it easier comparing with the standard. Please refer to this RFC in
206 * case you can't make sense out of these abbreviation; it will also
207 * explain the semantics related to the various events and actions.
208 */
209struct cp {
210 u_short proto; /* PPP control protocol number */
211 u_char protoidx; /* index into state table in struct sppp */
212 u_char flags;
213#define CP_LCP 0x01 /* this is the LCP */
214#define CP_AUTH 0x02 /* this is an authentication protocol */
215#define CP_NCP 0x04 /* this is a NCP */
216#define CP_QUAL 0x08 /* this is a quality reporting protocol */
217 const char *name; /* name of this control protocol */
218 /* event handlers */
219 void (*Up)(struct sppp *sp);
220 void (*Down)(struct sppp *sp);
221 void (*Open)(struct sppp *sp);
222 void (*Close)(struct sppp *sp);
223 void (*TO)(void *sp);
224 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len);
225 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len);
226 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len);
227 /* actions */
228 void (*tlu)(struct sppp *sp);
229 void (*tld)(struct sppp *sp);
230 void (*tls)(struct sppp *sp);
231 void (*tlf)(struct sppp *sp);
232 void (*scr)(struct sppp *sp);
233};
234
235#define SPP_FMT "%s: "
236#define SPP_ARGS(ifp) (ifp)->if_xname
237
238#define SPPP_LOCK(sp) mtx_lock (&(sp)->mtx)
239#define SPPP_UNLOCK(sp) mtx_unlock (&(sp)->mtx)
240#define SPPP_LOCK_ASSERT(sp) mtx_assert (&(sp)->mtx, MA_OWNED)
241#define SPPP_LOCK_OWNED(sp) mtx_owned (&(sp)->mtx)
242
243#ifdef INET
244/*
245 * The following disgusting hack gets around the problem that IP TOS
246 * can't be set yet. We want to put "interactive" traffic on a high
247 * priority queue. To decide if traffic is interactive, we check that
248 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
249 *
250 * XXX is this really still necessary? - joerg -
251 */
252static const u_short interactive_ports[8] = {
253 0, 513, 0, 0,
254 0, 21, 0, 23,
255};
256#define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
257#endif
258
259/* almost every function needs these */
260#define STDDCL \
261 struct ifnet *ifp = SP2IFP(sp); \
262 int debug = ifp->if_flags & IFF_DEBUG
263
264static int sppp_output(struct ifnet *ifp, struct mbuf *m,
265 struct sockaddr *dst, struct route *ro);
266
267static void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2);
268static void sppp_cisco_input(struct sppp *sp, struct mbuf *m);
269
270static void sppp_cp_input(const struct cp *cp, struct sppp *sp,
271 struct mbuf *m);
272static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
273 u_char ident, u_short len, void *data);
274/* static void sppp_cp_timeout(void *arg); */
275static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp,
276 int newstate);
277static void sppp_auth_send(const struct cp *cp,
278 struct sppp *sp, unsigned int type, unsigned int id,
279 ...);
280
281static void sppp_up_event(const struct cp *cp, struct sppp *sp);
282static void sppp_down_event(const struct cp *cp, struct sppp *sp);
283static void sppp_open_event(const struct cp *cp, struct sppp *sp);
284static void sppp_close_event(const struct cp *cp, struct sppp *sp);
285static void sppp_to_event(const struct cp *cp, struct sppp *sp);
286
287static void sppp_null(struct sppp *sp);
288
289static void sppp_pp_up(struct sppp *sp);
290static void sppp_pp_down(struct sppp *sp);
291
292static void sppp_lcp_init(struct sppp *sp);
293static void sppp_lcp_up(struct sppp *sp);
294static void sppp_lcp_down(struct sppp *sp);
295static void sppp_lcp_open(struct sppp *sp);
296static void sppp_lcp_close(struct sppp *sp);
297static void sppp_lcp_TO(void *sp);
298static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
299static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
300static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
301static void sppp_lcp_tlu(struct sppp *sp);
302static void sppp_lcp_tld(struct sppp *sp);
303static void sppp_lcp_tls(struct sppp *sp);
304static void sppp_lcp_tlf(struct sppp *sp);
305static void sppp_lcp_scr(struct sppp *sp);
306static void sppp_lcp_check_and_close(struct sppp *sp);
307static int sppp_ncp_check(struct sppp *sp);
308
309static void sppp_ipcp_init(struct sppp *sp);
310static void sppp_ipcp_up(struct sppp *sp);
311static void sppp_ipcp_down(struct sppp *sp);
312static void sppp_ipcp_open(struct sppp *sp);
313static void sppp_ipcp_close(struct sppp *sp);
314static void sppp_ipcp_TO(void *sp);
315static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
316static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
317static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
318static void sppp_ipcp_tlu(struct sppp *sp);
319static void sppp_ipcp_tld(struct sppp *sp);
320static void sppp_ipcp_tls(struct sppp *sp);
321static void sppp_ipcp_tlf(struct sppp *sp);
322static void sppp_ipcp_scr(struct sppp *sp);
323
324static void sppp_ipv6cp_init(struct sppp *sp);
325static void sppp_ipv6cp_up(struct sppp *sp);
326static void sppp_ipv6cp_down(struct sppp *sp);
327static void sppp_ipv6cp_open(struct sppp *sp);
328static void sppp_ipv6cp_close(struct sppp *sp);
329static void sppp_ipv6cp_TO(void *sp);
330static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len);
331static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
332static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
333static void sppp_ipv6cp_tlu(struct sppp *sp);
334static void sppp_ipv6cp_tld(struct sppp *sp);
335static void sppp_ipv6cp_tls(struct sppp *sp);
336static void sppp_ipv6cp_tlf(struct sppp *sp);
337static void sppp_ipv6cp_scr(struct sppp *sp);
338
339static void sppp_pap_input(struct sppp *sp, struct mbuf *m);
340static void sppp_pap_init(struct sppp *sp);
341static void sppp_pap_open(struct sppp *sp);
342static void sppp_pap_close(struct sppp *sp);
343static void sppp_pap_TO(void *sp);
344static void sppp_pap_my_TO(void *sp);
345static void sppp_pap_tlu(struct sppp *sp);
346static void sppp_pap_tld(struct sppp *sp);
347static void sppp_pap_scr(struct sppp *sp);
348
349static void sppp_chap_input(struct sppp *sp, struct mbuf *m);
350static void sppp_chap_init(struct sppp *sp);
351static void sppp_chap_open(struct sppp *sp);
352static void sppp_chap_close(struct sppp *sp);
353static void sppp_chap_TO(void *sp);
354static void sppp_chap_tlu(struct sppp *sp);
355static void sppp_chap_tld(struct sppp *sp);
356static void sppp_chap_scr(struct sppp *sp);
357
358static const char *sppp_auth_type_name(u_short proto, u_char type);
359static const char *sppp_cp_type_name(u_char type);
360#ifdef INET
361static const char *sppp_dotted_quad(u_long addr);
362static const char *sppp_ipcp_opt_name(u_char opt);
363#endif
364#ifdef INET6
365static const char *sppp_ipv6cp_opt_name(u_char opt);
366#endif
367static const char *sppp_lcp_opt_name(u_char opt);
368static const char *sppp_phase_name(enum ppp_phase phase);
369static const char *sppp_proto_name(u_short proto);
370static const char *sppp_state_name(int state);
371static int sppp_params(struct sppp *sp, u_long cmd, void *data);
372static int sppp_strnlen(u_char *p, int max);
373static void sppp_keepalive(void *dummy);
374static void sppp_phase_network(struct sppp *sp);
375static void sppp_print_bytes(const u_char *p, u_short len);
376static void sppp_print_string(const char *p, u_short len);
377static void sppp_qflush(struct ifqueue *ifq);
378#ifdef INET
379static void sppp_set_ip_addr(struct sppp *sp, u_long src);
380#endif
381#ifdef INET6
382static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src,
383 struct in6_addr *dst, struct in6_addr *srcmask);
384#ifdef IPV6CP_MYIFID_DYN
385static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src);
386static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src);
387#endif
388static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src);
389#endif
390
391/* if_start () wrapper */
392static void sppp_ifstart (struct ifnet *ifp);
393
394/* our control protocol descriptors */
395static const struct cp lcp = {
396 PPP_LCP, IDX_LCP, CP_LCP, "lcp",
397 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close,
398 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak,
399 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf,
400 sppp_lcp_scr
401};
402
403static const struct cp ipcp = {
404 PPP_IPCP, IDX_IPCP,
405#ifdef INET /* don't run IPCP if there's no IPv4 support */
406 CP_NCP,
407#else
408 0,
409#endif
410 "ipcp",
411 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close,
412 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak,
413 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf,
414 sppp_ipcp_scr
415};
416
417static const struct cp ipv6cp = {
418 PPP_IPV6CP, IDX_IPV6CP,
419#ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/
420 CP_NCP,
421#else
422 0,
423#endif
424 "ipv6cp",
425 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close,
426 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak,
427 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf,
428 sppp_ipv6cp_scr
429};
430
431static const struct cp pap = {
432 PPP_PAP, IDX_PAP, CP_AUTH, "pap",
433 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close,
434 sppp_pap_TO, 0, 0, 0,
435 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null,
436 sppp_pap_scr
437};
438
439static const struct cp chap = {
440 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap",
441 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close,
442 sppp_chap_TO, 0, 0, 0,
443 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null,
444 sppp_chap_scr
445};
446
447static const struct cp *cps[IDX_COUNT] = {
448 &lcp, /* IDX_LCP */
449 &ipcp, /* IDX_IPCP */
450 &ipv6cp, /* IDX_IPV6CP */
451 &pap, /* IDX_PAP */
452 &chap, /* IDX_CHAP */
453};
454
455static void*
456sppp_alloc(u_char type, struct ifnet *ifp)
457{
458 struct sppp *sp;
459
460 sp = malloc(sizeof(struct sppp), M_SPPP, M_WAITOK | M_ZERO);
461 sp->pp_ifp = ifp;
462
463 return (sp);
464}
465
466static void
467sppp_free(void *com, u_char type)
468{
469
470 free(com, M_SPPP);
471}
472
473static int
474sppp_modevent(module_t mod, int type, void *unused)
475{
476 switch (type) {
477 case MOD_LOAD:
478 /*
479 * XXX: should probably be IFT_SPPP, but it's fairly
480 * harmless to allocate struct sppp's for non-sppp
481 * interfaces.
482 */
483
484 if_register_com_alloc(IFT_PPP, sppp_alloc, sppp_free);
485 break;
486 case MOD_UNLOAD:
487 /* if_deregister_com_alloc(IFT_PPP); */
488 return EACCES;
489 default:
490 return EOPNOTSUPP;
491 }
492 return 0;
493}
494static moduledata_t spppmod = {
495 "sppp",
496 sppp_modevent,
497 0
498};
499MODULE_VERSION(sppp, 1);
500DECLARE_MODULE(sppp, spppmod, SI_SUB_DRIVERS, SI_ORDER_ANY);
501
502/*
503 * Exported functions, comprising our interface to the lower layer.
504 */
505
506/*
507 * Process the received packet.
508 */
509void
510sppp_input(struct ifnet *ifp, struct mbuf *m)
511{
512 struct ppp_header *h;
513 int isr = -1;
514 struct sppp *sp = IFP2SP(ifp);
515 int debug, do_account = 0;
516#ifdef INET
517 int hlen, vjlen;
518 u_char *iphdr;
519#endif
520
521 SPPP_LOCK(sp);
522 debug = ifp->if_flags & IFF_DEBUG;
523
524 if (ifp->if_flags & IFF_UP)
525 /* Count received bytes, add FCS and one flag */
526 ifp->if_ibytes += m->m_pkthdr.len + 3;
527
528 if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
529 /* Too small packet, drop it. */
530 if (debug)
531 log(LOG_DEBUG,
532 SPP_FMT "input packet is too small, %d bytes\n",
533 SPP_ARGS(ifp), m->m_pkthdr.len);
534 drop:
535 m_freem (m);
536 SPPP_UNLOCK(sp);
537 drop2:
538 ++ifp->if_ierrors;
539 ++ifp->if_iqdrops;
540 return;
541 }
542
543 if (sp->pp_mode == PP_FR) {
544 sppp_fr_input (sp, m);
545 SPPP_UNLOCK(sp);
546 return;
547 }
548
549 /* Get PPP header. */
550 h = mtod (m, struct ppp_header*);
551 m_adj (m, PPP_HEADER_LEN);
552
553 switch (h->address) {
554 case PPP_ALLSTATIONS:
555 if (h->control != PPP_UI)
556 goto invalid;
557 if (sp->pp_mode == IFF_CISCO) {
558 if (debug)
559 log(LOG_DEBUG,
560 SPP_FMT "PPP packet in Cisco mode "
561 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
562 SPP_ARGS(ifp),
563 h->address, h->control, ntohs(h->protocol));
564 goto drop;
565 }
566 switch (ntohs (h->protocol)) {
567 default:
568 if (debug)
569 log(LOG_DEBUG,
570 SPP_FMT "rejecting protocol "
571 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
572 SPP_ARGS(ifp),
573 h->address, h->control, ntohs(h->protocol));
574 if (sp->state[IDX_LCP] == STATE_OPENED)
575 sppp_cp_send (sp, PPP_LCP, PROTO_REJ,
576 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2,
577 &h->protocol);
578 ++ifp->if_noproto;
579 goto drop;
580 case PPP_LCP:
581 sppp_cp_input(&lcp, sp, m);
582 m_freem (m);
583 SPPP_UNLOCK(sp);
584 return;
585 case PPP_PAP:
586 if (sp->pp_phase >= PHASE_AUTHENTICATE)
587 sppp_pap_input(sp, m);
588 m_freem (m);
589 SPPP_UNLOCK(sp);
590 return;
591 case PPP_CHAP:
592 if (sp->pp_phase >= PHASE_AUTHENTICATE)
593 sppp_chap_input(sp, m);
594 m_freem (m);
595 SPPP_UNLOCK(sp);
596 return;
597#ifdef INET
598 case PPP_IPCP:
599 if (sp->pp_phase == PHASE_NETWORK)
600 sppp_cp_input(&ipcp, sp, m);
601 m_freem (m);
602 SPPP_UNLOCK(sp);
603 return;
604 case PPP_IP:
605 if (sp->state[IDX_IPCP] == STATE_OPENED) {
606 isr = NETISR_IP;
607 }
608 do_account++;
609 break;
610 case PPP_VJ_COMP:
611 if (sp->state[IDX_IPCP] == STATE_OPENED) {
612 if ((vjlen =
613 sl_uncompress_tcp_core(mtod(m, u_char *),
614 m->m_len, m->m_len,
615 TYPE_COMPRESSED_TCP,
616 sp->pp_comp,
617 &iphdr, &hlen)) <= 0) {
618 if (debug)
619 log(LOG_INFO,
620 SPP_FMT "VJ uncompress failed on compressed packet\n",
621 SPP_ARGS(ifp));
622 goto drop;
623 }
624
625 /*
626 * Trim the VJ header off the packet, and prepend
627 * the uncompressed IP header (which will usually
628 * end up in two chained mbufs since there's not
629 * enough leading space in the existing mbuf).
630 */
631 m_adj(m, vjlen);
632 M_PREPEND(m, hlen, M_DONTWAIT);
633 if (m == NULL) {
634 SPPP_UNLOCK(sp);
635 goto drop2;
636 }
637 bcopy(iphdr, mtod(m, u_char *), hlen);
638 isr = NETISR_IP;
639 }
640 do_account++;
641 break;
642 case PPP_VJ_UCOMP:
643 if (sp->state[IDX_IPCP] == STATE_OPENED) {
644 if (sl_uncompress_tcp_core(mtod(m, u_char *),
645 m->m_len, m->m_len,
646 TYPE_UNCOMPRESSED_TCP,
647 sp->pp_comp,
648 &iphdr, &hlen) != 0) {
649 if (debug)
650 log(LOG_INFO,
651 SPP_FMT "VJ uncompress failed on uncompressed packet\n",
652 SPP_ARGS(ifp));
653 goto drop;
654 }
655 isr = NETISR_IP;
656 }
657 do_account++;
658 break;
659#endif
660#ifdef INET6
661 case PPP_IPV6CP:
662 if (sp->pp_phase == PHASE_NETWORK)
663 sppp_cp_input(&ipv6cp, sp, m);
664 m_freem (m);
665 SPPP_UNLOCK(sp);
666 return;
667
668 case PPP_IPV6:
669 if (sp->state[IDX_IPV6CP] == STATE_OPENED)
670 isr = NETISR_IPV6;
671 do_account++;
672 break;
673#endif
674#ifdef IPX
675 case PPP_IPX:
676 /* IPX IPXCP not implemented yet */
677 if (sp->pp_phase == PHASE_NETWORK)
678 isr = NETISR_IPX;
679 do_account++;
680 break;
681#endif
682 }
683 break;
684 case CISCO_MULTICAST:
685 case CISCO_UNICAST:
686 /* Don't check the control field here (RFC 1547). */
687 if (sp->pp_mode != IFF_CISCO) {
688 if (debug)
689 log(LOG_DEBUG,
690 SPP_FMT "Cisco packet in PPP mode "
691 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
692 SPP_ARGS(ifp),
693 h->address, h->control, ntohs(h->protocol));
694 goto drop;
695 }
696 switch (ntohs (h->protocol)) {
697 default:
698 ++ifp->if_noproto;
699 goto invalid;
700 case CISCO_KEEPALIVE:
701 sppp_cisco_input (sp, m);
702 m_freem (m);
703 SPPP_UNLOCK(sp);
704 return;
705#ifdef INET
706 case ETHERTYPE_IP:
707 isr = NETISR_IP;
708 do_account++;
709 break;
710#endif
711#ifdef INET6
712 case ETHERTYPE_IPV6:
713 isr = NETISR_IPV6;
714 do_account++;
715 break;
716#endif
717#ifdef IPX
718 case ETHERTYPE_IPX:
719 isr = NETISR_IPX;
720 do_account++;
721 break;
722#endif
723 }
724 break;
725 default: /* Invalid PPP packet. */
726 invalid:
727 if (debug)
728 log(LOG_DEBUG,
729 SPP_FMT "invalid input packet "
730 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
731 SPP_ARGS(ifp),
732 h->address, h->control, ntohs(h->protocol));
733 goto drop;
734 }
735
736 if (! (ifp->if_flags & IFF_UP) || isr == -1)
737 goto drop;
738
739 SPPP_UNLOCK(sp);
740 M_SETFIB(m, ifp->if_fib);
741 /* Check queue. */
742 if (netisr_queue(isr, m)) { /* (0) on success. */
743 if (debug)
744 log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n",
745 SPP_ARGS(ifp));
746 goto drop2;
747 }
748
749 if (do_account)
750 /*
751 * Do only account for network packets, not for control
752 * packets. This is used by some subsystems to detect
753 * idle lines.
754 */
755 sp->pp_last_recv = time_uptime;
756}
757
758static void
759sppp_ifstart_sched(void *dummy)
760{
761 struct sppp *sp = dummy;
762
763 sp->if_start(SP2IFP(sp));
764}
765
766/* if_start () wrapper function. We use it to schedule real if_start () for
767 * execution. We can't call it directly
768 */
769static void
770sppp_ifstart(struct ifnet *ifp)
771{
772 struct sppp *sp = IFP2SP(ifp);
773
774 if (SPPP_LOCK_OWNED(sp)) {
775 if (callout_pending(&sp->ifstart_callout))
776 return;
777 callout_reset(&sp->ifstart_callout, 1, sppp_ifstart_sched,
778 (void *)sp);
779 } else {
780 sp->if_start(ifp);
781 }
782}
783
784/*
785 * Enqueue transmit packet.
786 */
787static int
788sppp_output(struct ifnet *ifp, struct mbuf *m,
789 struct sockaddr *dst, struct route *ro)
790{
791 struct sppp *sp = IFP2SP(ifp);
792 struct ppp_header *h;
793 struct ifqueue *ifq = NULL;
|
794 int s, error, rv = 0;
| 794 int error, rv = 0;
|
795#ifdef INET
796 int ipproto = PPP_IP;
797#endif
798 int debug = ifp->if_flags & IFF_DEBUG;
799
| 795#ifdef INET
796 int ipproto = PPP_IP;
797#endif
798 int debug = ifp->if_flags & IFF_DEBUG;
799
|
800 s = splimp();
| |
801 SPPP_LOCK(sp);
802
803 if (!(ifp->if_flags & IFF_UP) ||
804 (!(ifp->if_flags & IFF_AUTO) &&
805 !(ifp->if_drv_flags & IFF_DRV_RUNNING))) {
806#ifdef INET6
807 drop:
808#endif
809 m_freem (m);
810 SPPP_UNLOCK(sp);
| 800 SPPP_LOCK(sp);
801
802 if (!(ifp->if_flags & IFF_UP) ||
803 (!(ifp->if_flags & IFF_AUTO) &&
804 !(ifp->if_drv_flags & IFF_DRV_RUNNING))) {
805#ifdef INET6
806 drop:
807#endif
808 m_freem (m);
809 SPPP_UNLOCK(sp);
|
811 splx (s);
| |
812 return (ENETDOWN);
813 }
814
815 if ((ifp->if_flags & IFF_AUTO) &&
816 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
817#ifdef INET6
818 /*
819 * XXX
820 *
821 * Hack to prevent the initialization-time generated
822 * IPv6 multicast packet to erroneously cause a
823 * dialout event in case IPv6 has been
824 * administratively disabled on that interface.
825 */
826 if (dst->sa_family == AF_INET6 &&
827 !(sp->confflags & CONF_ENABLE_IPV6))
828 goto drop;
829#endif
830 /*
831 * Interface is not yet running, but auto-dial. Need
832 * to start LCP for it.
833 */
834 ifp->if_drv_flags |= IFF_DRV_RUNNING;
| 810 return (ENETDOWN);
811 }
812
813 if ((ifp->if_flags & IFF_AUTO) &&
814 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
815#ifdef INET6
816 /*
817 * XXX
818 *
819 * Hack to prevent the initialization-time generated
820 * IPv6 multicast packet to erroneously cause a
821 * dialout event in case IPv6 has been
822 * administratively disabled on that interface.
823 */
824 if (dst->sa_family == AF_INET6 &&
825 !(sp->confflags & CONF_ENABLE_IPV6))
826 goto drop;
827#endif
828 /*
829 * Interface is not yet running, but auto-dial. Need
830 * to start LCP for it.
831 */
832 ifp->if_drv_flags |= IFF_DRV_RUNNING;
|
835 splx(s);
| |
836 lcp.Open(sp);
| 833 lcp.Open(sp);
|
837 s = splimp();
| |
838 }
839
840#ifdef INET
841 if (dst->sa_family == AF_INET) {
842 /* XXX Check mbuf length here? */
843 struct ip *ip = mtod (m, struct ip*);
844 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
845
846 /*
847 * When using dynamic local IP address assignment by using
848 * 0.0.0.0 as a local address, the first TCP session will
849 * not connect because the local TCP checksum is computed
850 * using 0.0.0.0 which will later become our real IP address
851 * so the TCP checksum computed at the remote end will
852 * become invalid. So we
853 * - don't let packets with src ip addr 0 thru
854 * - we flag TCP packets with src ip 0 as an error
855 */
856
857 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */
858 {
859 m_freem(m);
860 SPPP_UNLOCK(sp);
| 834 }
835
836#ifdef INET
837 if (dst->sa_family == AF_INET) {
838 /* XXX Check mbuf length here? */
839 struct ip *ip = mtod (m, struct ip*);
840 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
841
842 /*
843 * When using dynamic local IP address assignment by using
844 * 0.0.0.0 as a local address, the first TCP session will
845 * not connect because the local TCP checksum is computed
846 * using 0.0.0.0 which will later become our real IP address
847 * so the TCP checksum computed at the remote end will
848 * become invalid. So we
849 * - don't let packets with src ip addr 0 thru
850 * - we flag TCP packets with src ip 0 as an error
851 */
852
853 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */
854 {
855 m_freem(m);
856 SPPP_UNLOCK(sp);
|
861 splx(s);
| |
862 if(ip->ip_p == IPPROTO_TCP)
863 return(EADDRNOTAVAIL);
864 else
865 return(0);
866 }
867
868 /*
869 * Put low delay, telnet, rlogin and ftp control packets
870 * in front of the queue or let ALTQ take care.
871 */
872 if (ALTQ_IS_ENABLED(&ifp->if_snd))
873 ;
874 else if (_IF_QFULL(&sp->pp_fastq))
875 ;
876 else if (ip->ip_tos & IPTOS_LOWDELAY)
877 ifq = &sp->pp_fastq;
878 else if (m->m_len < sizeof *ip + sizeof *tcp)
879 ;
880 else if (ip->ip_p != IPPROTO_TCP)
881 ;
882 else if (INTERACTIVE (ntohs (tcp->th_sport)))
883 ifq = &sp->pp_fastq;
884 else if (INTERACTIVE (ntohs (tcp->th_dport)))
885 ifq = &sp->pp_fastq;
886
887 /*
888 * Do IP Header compression
889 */
890 if (sp->pp_mode != IFF_CISCO && sp->pp_mode != PP_FR &&
891 (sp->ipcp.flags & IPCP_VJ) && ip->ip_p == IPPROTO_TCP)
892 switch (sl_compress_tcp(m, ip, sp->pp_comp,
893 sp->ipcp.compress_cid)) {
894 case TYPE_COMPRESSED_TCP:
895 ipproto = PPP_VJ_COMP;
896 break;
897 case TYPE_UNCOMPRESSED_TCP:
898 ipproto = PPP_VJ_UCOMP;
899 break;
900 case TYPE_IP:
901 ipproto = PPP_IP;
902 break;
903 default:
904 m_freem(m);
905 SPPP_UNLOCK(sp);
| 857 if(ip->ip_p == IPPROTO_TCP)
858 return(EADDRNOTAVAIL);
859 else
860 return(0);
861 }
862
863 /*
864 * Put low delay, telnet, rlogin and ftp control packets
865 * in front of the queue or let ALTQ take care.
866 */
867 if (ALTQ_IS_ENABLED(&ifp->if_snd))
868 ;
869 else if (_IF_QFULL(&sp->pp_fastq))
870 ;
871 else if (ip->ip_tos & IPTOS_LOWDELAY)
872 ifq = &sp->pp_fastq;
873 else if (m->m_len < sizeof *ip + sizeof *tcp)
874 ;
875 else if (ip->ip_p != IPPROTO_TCP)
876 ;
877 else if (INTERACTIVE (ntohs (tcp->th_sport)))
878 ifq = &sp->pp_fastq;
879 else if (INTERACTIVE (ntohs (tcp->th_dport)))
880 ifq = &sp->pp_fastq;
881
882 /*
883 * Do IP Header compression
884 */
885 if (sp->pp_mode != IFF_CISCO && sp->pp_mode != PP_FR &&
886 (sp->ipcp.flags & IPCP_VJ) && ip->ip_p == IPPROTO_TCP)
887 switch (sl_compress_tcp(m, ip, sp->pp_comp,
888 sp->ipcp.compress_cid)) {
889 case TYPE_COMPRESSED_TCP:
890 ipproto = PPP_VJ_COMP;
891 break;
892 case TYPE_UNCOMPRESSED_TCP:
893 ipproto = PPP_VJ_UCOMP;
894 break;
895 case TYPE_IP:
896 ipproto = PPP_IP;
897 break;
898 default:
899 m_freem(m);
900 SPPP_UNLOCK(sp);
|
906 splx(s);
| |
907 return (EINVAL);
908 }
909 }
910#endif
911
912#ifdef INET6
913 if (dst->sa_family == AF_INET6) {
914 /* XXX do something tricky here? */
915 }
916#endif
917
918 if (sp->pp_mode == PP_FR) {
919 /* Add frame relay header. */
920 m = sppp_fr_header (sp, m, dst->sa_family);
921 if (! m)
922 goto nobufs;
923 goto out;
924 }
925
926 /*
927 * Prepend general data packet PPP header. For now, IP only.
928 */
929 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT);
930 if (! m) {
931nobufs: if (debug)
932 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
933 SPP_ARGS(ifp));
934 ++ifp->if_oerrors;
935 SPPP_UNLOCK(sp);
| 901 return (EINVAL);
902 }
903 }
904#endif
905
906#ifdef INET6
907 if (dst->sa_family == AF_INET6) {
908 /* XXX do something tricky here? */
909 }
910#endif
911
912 if (sp->pp_mode == PP_FR) {
913 /* Add frame relay header. */
914 m = sppp_fr_header (sp, m, dst->sa_family);
915 if (! m)
916 goto nobufs;
917 goto out;
918 }
919
920 /*
921 * Prepend general data packet PPP header. For now, IP only.
922 */
923 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT);
924 if (! m) {
925nobufs: if (debug)
926 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
927 SPP_ARGS(ifp));
928 ++ifp->if_oerrors;
929 SPPP_UNLOCK(sp);
|
936 splx (s);
| |
937 return (ENOBUFS);
938 }
939 /*
940 * May want to check size of packet
941 * (albeit due to the implementation it's always enough)
942 */
943 h = mtod (m, struct ppp_header*);
944 if (sp->pp_mode == IFF_CISCO) {
945 h->address = CISCO_UNICAST; /* unicast address */
946 h->control = 0;
947 } else {
948 h->address = PPP_ALLSTATIONS; /* broadcast address */
949 h->control = PPP_UI; /* Unnumbered Info */
950 }
951
952 switch (dst->sa_family) {
953#ifdef INET
954 case AF_INET: /* Internet Protocol */
955 if (sp->pp_mode == IFF_CISCO)
956 h->protocol = htons (ETHERTYPE_IP);
957 else {
958 /*
959 * Don't choke with an ENETDOWN early. It's
960 * possible that we just started dialing out,
961 * so don't drop the packet immediately. If
962 * we notice that we run out of buffer space
963 * below, we will however remember that we are
964 * not ready to carry IP packets, and return
965 * ENETDOWN, as opposed to ENOBUFS.
966 */
967 h->protocol = htons(ipproto);
968 if (sp->state[IDX_IPCP] != STATE_OPENED)
969 rv = ENETDOWN;
970 }
971 break;
972#endif
973#ifdef INET6
974 case AF_INET6: /* Internet Protocol */
975 if (sp->pp_mode == IFF_CISCO)
976 h->protocol = htons (ETHERTYPE_IPV6);
977 else {
978 /*
979 * Don't choke with an ENETDOWN early. It's
980 * possible that we just started dialing out,
981 * so don't drop the packet immediately. If
982 * we notice that we run out of buffer space
983 * below, we will however remember that we are
984 * not ready to carry IP packets, and return
985 * ENETDOWN, as opposed to ENOBUFS.
986 */
987 h->protocol = htons(PPP_IPV6);
988 if (sp->state[IDX_IPV6CP] != STATE_OPENED)
989 rv = ENETDOWN;
990 }
991 break;
992#endif
993#ifdef IPX
994 case AF_IPX: /* Novell IPX Protocol */
995 h->protocol = htons (sp->pp_mode == IFF_CISCO ?
996 ETHERTYPE_IPX : PPP_IPX);
997 break;
998#endif
999 default:
1000 m_freem (m);
1001 ++ifp->if_oerrors;
1002 SPPP_UNLOCK(sp);
| 930 return (ENOBUFS);
931 }
932 /*
933 * May want to check size of packet
934 * (albeit due to the implementation it's always enough)
935 */
936 h = mtod (m, struct ppp_header*);
937 if (sp->pp_mode == IFF_CISCO) {
938 h->address = CISCO_UNICAST; /* unicast address */
939 h->control = 0;
940 } else {
941 h->address = PPP_ALLSTATIONS; /* broadcast address */
942 h->control = PPP_UI; /* Unnumbered Info */
943 }
944
945 switch (dst->sa_family) {
946#ifdef INET
947 case AF_INET: /* Internet Protocol */
948 if (sp->pp_mode == IFF_CISCO)
949 h->protocol = htons (ETHERTYPE_IP);
950 else {
951 /*
952 * Don't choke with an ENETDOWN early. It's
953 * possible that we just started dialing out,
954 * so don't drop the packet immediately. If
955 * we notice that we run out of buffer space
956 * below, we will however remember that we are
957 * not ready to carry IP packets, and return
958 * ENETDOWN, as opposed to ENOBUFS.
959 */
960 h->protocol = htons(ipproto);
961 if (sp->state[IDX_IPCP] != STATE_OPENED)
962 rv = ENETDOWN;
963 }
964 break;
965#endif
966#ifdef INET6
967 case AF_INET6: /* Internet Protocol */
968 if (sp->pp_mode == IFF_CISCO)
969 h->protocol = htons (ETHERTYPE_IPV6);
970 else {
971 /*
972 * Don't choke with an ENETDOWN early. It's
973 * possible that we just started dialing out,
974 * so don't drop the packet immediately. If
975 * we notice that we run out of buffer space
976 * below, we will however remember that we are
977 * not ready to carry IP packets, and return
978 * ENETDOWN, as opposed to ENOBUFS.
979 */
980 h->protocol = htons(PPP_IPV6);
981 if (sp->state[IDX_IPV6CP] != STATE_OPENED)
982 rv = ENETDOWN;
983 }
984 break;
985#endif
986#ifdef IPX
987 case AF_IPX: /* Novell IPX Protocol */
988 h->protocol = htons (sp->pp_mode == IFF_CISCO ?
989 ETHERTYPE_IPX : PPP_IPX);
990 break;
991#endif
992 default:
993 m_freem (m);
994 ++ifp->if_oerrors;
995 SPPP_UNLOCK(sp);
|
1003 splx (s);
| |
1004 return (EAFNOSUPPORT);
1005 }
1006
1007 /*
1008 * Queue message on interface, and start output if interface
1009 * not yet active.
1010 */
1011out:
1012 if (ifq != NULL)
1013 error = !(IF_HANDOFF_ADJ(ifq, m, ifp, 3));
1014 else
1015 IFQ_HANDOFF_ADJ(ifp, m, 3, error);
1016 if (error) {
1017 ++ifp->if_oerrors;
1018 SPPP_UNLOCK(sp);
| 996 return (EAFNOSUPPORT);
997 }
998
999 /*
1000 * Queue message on interface, and start output if interface
1001 * not yet active.
1002 */
1003out:
1004 if (ifq != NULL)
1005 error = !(IF_HANDOFF_ADJ(ifq, m, ifp, 3));
1006 else
1007 IFQ_HANDOFF_ADJ(ifp, m, 3, error);
1008 if (error) {
1009 ++ifp->if_oerrors;
1010 SPPP_UNLOCK(sp);
|
1019 splx (s);
| |
1020 return (rv? rv: ENOBUFS);
1021 }
1022 SPPP_UNLOCK(sp);
| 1011 return (rv? rv: ENOBUFS);
1012 }
1013 SPPP_UNLOCK(sp);
|
1023 splx (s);
| |
1024 /*
1025 * Unlike in sppp_input(), we can always bump the timestamp
1026 * here since sppp_output() is only called on behalf of
1027 * network-layer traffic; control-layer traffic is handled
1028 * by sppp_cp_send().
1029 */
1030 sp->pp_last_sent = time_uptime;
1031 return (0);
1032}
1033
1034void
1035sppp_attach(struct ifnet *ifp)
1036{
1037 struct sppp *sp = IFP2SP(ifp);
1038
1039 /* Initialize mtx lock */
1040 mtx_init(&sp->mtx, "sppp", MTX_NETWORK_LOCK, MTX_DEF | MTX_RECURSE);
1041
1042 /* Initialize keepalive handler. */
1043 callout_init(&sp->keepalive_callout, CALLOUT_MPSAFE);
1044 callout_reset(&sp->keepalive_callout, hz * 10, sppp_keepalive,
1045 (void *)sp);
1046
1047 ifp->if_mtu = PP_MTU;
1048 ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
1049 ifp->if_output = sppp_output;
1050#if 0
1051 sp->pp_flags = PP_KEEPALIVE;
1052#endif
1053 ifp->if_snd.ifq_maxlen = 32;
1054 sp->pp_fastq.ifq_maxlen = 32;
1055 sp->pp_cpq.ifq_maxlen = 20;
1056 sp->pp_loopcnt = 0;
1057 sp->pp_alivecnt = 0;
1058 bzero(&sp->pp_seq[0], sizeof(sp->pp_seq));
1059 bzero(&sp->pp_rseq[0], sizeof(sp->pp_rseq));
1060 sp->pp_phase = PHASE_DEAD;
1061 sp->pp_up = sppp_pp_up;
1062 sp->pp_down = sppp_pp_down;
1063 if(!mtx_initialized(&sp->pp_cpq.ifq_mtx))
1064 mtx_init(&sp->pp_cpq.ifq_mtx, "sppp_cpq", NULL, MTX_DEF);
1065 if(!mtx_initialized(&sp->pp_fastq.ifq_mtx))
1066 mtx_init(&sp->pp_fastq.ifq_mtx, "sppp_fastq", NULL, MTX_DEF);
1067 sp->pp_last_recv = sp->pp_last_sent = time_uptime;
1068 sp->confflags = 0;
1069#ifdef INET
1070 sp->confflags |= CONF_ENABLE_VJ;
1071#endif
1072#ifdef INET6
1073 sp->confflags |= CONF_ENABLE_IPV6;
1074#endif
1075 callout_init(&sp->ifstart_callout, CALLOUT_MPSAFE);
1076 sp->if_start = ifp->if_start;
1077 ifp->if_start = sppp_ifstart;
1078 sp->pp_comp = malloc(sizeof(struct slcompress), M_TEMP, M_WAITOK);
1079 sl_compress_init(sp->pp_comp, -1);
1080 sppp_lcp_init(sp);
1081 sppp_ipcp_init(sp);
1082 sppp_ipv6cp_init(sp);
1083 sppp_pap_init(sp);
1084 sppp_chap_init(sp);
1085}
1086
1087void
1088sppp_detach(struct ifnet *ifp)
1089{
1090 struct sppp *sp = IFP2SP(ifp);
1091 int i;
1092
1093 KASSERT(mtx_initialized(&sp->mtx), ("sppp mutex is not initialized"));
1094
1095 /* Stop keepalive handler. */
1096 if (!callout_drain(&sp->keepalive_callout))
1097 callout_stop(&sp->keepalive_callout);
1098
1099 for (i = 0; i < IDX_COUNT; i++) {
1100 if (!callout_drain(&sp->ch[i]))
1101 callout_stop(&sp->ch[i]);
1102 }
1103 if (!callout_drain(&sp->pap_my_to_ch))
1104 callout_stop(&sp->pap_my_to_ch);
1105 mtx_destroy(&sp->pp_cpq.ifq_mtx);
1106 mtx_destroy(&sp->pp_fastq.ifq_mtx);
1107 mtx_destroy(&sp->mtx);
1108}
1109
1110/*
1111 * Flush the interface output queue.
1112 */
1113static void
1114sppp_flush_unlocked(struct ifnet *ifp)
1115{
1116 struct sppp *sp = IFP2SP(ifp);
1117
1118 sppp_qflush ((struct ifqueue *)&SP2IFP(sp)->if_snd);
1119 sppp_qflush (&sp->pp_fastq);
1120 sppp_qflush (&sp->pp_cpq);
1121}
1122
1123void
1124sppp_flush(struct ifnet *ifp)
1125{
1126 struct sppp *sp = IFP2SP(ifp);
1127
1128 SPPP_LOCK(sp);
1129 sppp_flush_unlocked (ifp);
1130 SPPP_UNLOCK(sp);
1131}
1132
1133/*
1134 * Check if the output queue is empty.
1135 */
1136int
1137sppp_isempty(struct ifnet *ifp)
1138{
1139 struct sppp *sp = IFP2SP(ifp);
| 1014 /*
1015 * Unlike in sppp_input(), we can always bump the timestamp
1016 * here since sppp_output() is only called on behalf of
1017 * network-layer traffic; control-layer traffic is handled
1018 * by sppp_cp_send().
1019 */
1020 sp->pp_last_sent = time_uptime;
1021 return (0);
1022}
1023
1024void
1025sppp_attach(struct ifnet *ifp)
1026{
1027 struct sppp *sp = IFP2SP(ifp);
1028
1029 /* Initialize mtx lock */
1030 mtx_init(&sp->mtx, "sppp", MTX_NETWORK_LOCK, MTX_DEF | MTX_RECURSE);
1031
1032 /* Initialize keepalive handler. */
1033 callout_init(&sp->keepalive_callout, CALLOUT_MPSAFE);
1034 callout_reset(&sp->keepalive_callout, hz * 10, sppp_keepalive,
1035 (void *)sp);
1036
1037 ifp->if_mtu = PP_MTU;
1038 ifp->if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
1039 ifp->if_output = sppp_output;
1040#if 0
1041 sp->pp_flags = PP_KEEPALIVE;
1042#endif
1043 ifp->if_snd.ifq_maxlen = 32;
1044 sp->pp_fastq.ifq_maxlen = 32;
1045 sp->pp_cpq.ifq_maxlen = 20;
1046 sp->pp_loopcnt = 0;
1047 sp->pp_alivecnt = 0;
1048 bzero(&sp->pp_seq[0], sizeof(sp->pp_seq));
1049 bzero(&sp->pp_rseq[0], sizeof(sp->pp_rseq));
1050 sp->pp_phase = PHASE_DEAD;
1051 sp->pp_up = sppp_pp_up;
1052 sp->pp_down = sppp_pp_down;
1053 if(!mtx_initialized(&sp->pp_cpq.ifq_mtx))
1054 mtx_init(&sp->pp_cpq.ifq_mtx, "sppp_cpq", NULL, MTX_DEF);
1055 if(!mtx_initialized(&sp->pp_fastq.ifq_mtx))
1056 mtx_init(&sp->pp_fastq.ifq_mtx, "sppp_fastq", NULL, MTX_DEF);
1057 sp->pp_last_recv = sp->pp_last_sent = time_uptime;
1058 sp->confflags = 0;
1059#ifdef INET
1060 sp->confflags |= CONF_ENABLE_VJ;
1061#endif
1062#ifdef INET6
1063 sp->confflags |= CONF_ENABLE_IPV6;
1064#endif
1065 callout_init(&sp->ifstart_callout, CALLOUT_MPSAFE);
1066 sp->if_start = ifp->if_start;
1067 ifp->if_start = sppp_ifstart;
1068 sp->pp_comp = malloc(sizeof(struct slcompress), M_TEMP, M_WAITOK);
1069 sl_compress_init(sp->pp_comp, -1);
1070 sppp_lcp_init(sp);
1071 sppp_ipcp_init(sp);
1072 sppp_ipv6cp_init(sp);
1073 sppp_pap_init(sp);
1074 sppp_chap_init(sp);
1075}
1076
1077void
1078sppp_detach(struct ifnet *ifp)
1079{
1080 struct sppp *sp = IFP2SP(ifp);
1081 int i;
1082
1083 KASSERT(mtx_initialized(&sp->mtx), ("sppp mutex is not initialized"));
1084
1085 /* Stop keepalive handler. */
1086 if (!callout_drain(&sp->keepalive_callout))
1087 callout_stop(&sp->keepalive_callout);
1088
1089 for (i = 0; i < IDX_COUNT; i++) {
1090 if (!callout_drain(&sp->ch[i]))
1091 callout_stop(&sp->ch[i]);
1092 }
1093 if (!callout_drain(&sp->pap_my_to_ch))
1094 callout_stop(&sp->pap_my_to_ch);
1095 mtx_destroy(&sp->pp_cpq.ifq_mtx);
1096 mtx_destroy(&sp->pp_fastq.ifq_mtx);
1097 mtx_destroy(&sp->mtx);
1098}
1099
1100/*
1101 * Flush the interface output queue.
1102 */
1103static void
1104sppp_flush_unlocked(struct ifnet *ifp)
1105{
1106 struct sppp *sp = IFP2SP(ifp);
1107
1108 sppp_qflush ((struct ifqueue *)&SP2IFP(sp)->if_snd);
1109 sppp_qflush (&sp->pp_fastq);
1110 sppp_qflush (&sp->pp_cpq);
1111}
1112
1113void
1114sppp_flush(struct ifnet *ifp)
1115{
1116 struct sppp *sp = IFP2SP(ifp);
1117
1118 SPPP_LOCK(sp);
1119 sppp_flush_unlocked (ifp);
1120 SPPP_UNLOCK(sp);
1121}
1122
1123/*
1124 * Check if the output queue is empty.
1125 */
1126int
1127sppp_isempty(struct ifnet *ifp)
1128{
1129 struct sppp *sp = IFP2SP(ifp);
|
1140 int empty, s;
| 1130 int empty;
|
1141
| 1131
|
1142 s = splimp();
| |
1143 SPPP_LOCK(sp);
1144 empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head &&
1145 !SP2IFP(sp)->if_snd.ifq_head;
1146 SPPP_UNLOCK(sp);
| 1132 SPPP_LOCK(sp);
1133 empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head &&
1134 !SP2IFP(sp)->if_snd.ifq_head;
1135 SPPP_UNLOCK(sp);
|
1147 splx(s);
| |
1148 return (empty);
1149}
1150
1151/*
1152 * Get next packet to send.
1153 */
1154struct mbuf *
1155sppp_dequeue(struct ifnet *ifp)
1156{
1157 struct sppp *sp = IFP2SP(ifp);
1158 struct mbuf *m;
| 1136 return (empty);
1137}
1138
1139/*
1140 * Get next packet to send.
1141 */
1142struct mbuf *
1143sppp_dequeue(struct ifnet *ifp)
1144{
1145 struct sppp *sp = IFP2SP(ifp);
1146 struct mbuf *m;
|
1159 int s;
| |
1160
| 1147
|
1161 s = splimp();
| |
1162 SPPP_LOCK(sp);
1163 /*
1164 * Process only the control protocol queue until we have at
1165 * least one NCP open.
1166 *
1167 * Do always serve all three queues in Cisco mode.
1168 */
1169 IF_DEQUEUE(&sp->pp_cpq, m);
1170 if (m == NULL &&
1171 (sppp_ncp_check(sp) || sp->pp_mode == IFF_CISCO ||
1172 sp->pp_mode == PP_FR)) {
1173 IF_DEQUEUE(&sp->pp_fastq, m);
1174 if (m == NULL)
1175 IF_DEQUEUE (&SP2IFP(sp)->if_snd, m);
1176 }
1177 SPPP_UNLOCK(sp);
| 1148 SPPP_LOCK(sp);
1149 /*
1150 * Process only the control protocol queue until we have at
1151 * least one NCP open.
1152 *
1153 * Do always serve all three queues in Cisco mode.
1154 */
1155 IF_DEQUEUE(&sp->pp_cpq, m);
1156 if (m == NULL &&
1157 (sppp_ncp_check(sp) || sp->pp_mode == IFF_CISCO ||
1158 sp->pp_mode == PP_FR)) {
1159 IF_DEQUEUE(&sp->pp_fastq, m);
1160 if (m == NULL)
1161 IF_DEQUEUE (&SP2IFP(sp)->if_snd, m);
1162 }
1163 SPPP_UNLOCK(sp);
|
1178 splx(s);
| |
1179 return m;
1180}
1181
1182/*
1183 * Pick the next packet, do not remove it from the queue.
1184 */
1185struct mbuf *
1186sppp_pick(struct ifnet *ifp)
1187{
1188 struct sppp *sp = IFP2SP(ifp);
1189 struct mbuf *m;
| 1164 return m;
1165}
1166
1167/*
1168 * Pick the next packet, do not remove it from the queue.
1169 */
1170struct mbuf *
1171sppp_pick(struct ifnet *ifp)
1172{
1173 struct sppp *sp = IFP2SP(ifp);
1174 struct mbuf *m;
|
1190 int s;
| |
1191
| 1175
|
1192 s = splimp ();
| |
1193 SPPP_LOCK(sp);
1194
1195 m = sp->pp_cpq.ifq_head;
1196 if (m == NULL &&
1197 (sp->pp_phase == PHASE_NETWORK ||
1198 sp->pp_mode == IFF_CISCO ||
1199 sp->pp_mode == PP_FR))
1200 if ((m = sp->pp_fastq.ifq_head) == NULL)
1201 m = SP2IFP(sp)->if_snd.ifq_head;
1202 SPPP_UNLOCK(sp);
| 1176 SPPP_LOCK(sp);
1177
1178 m = sp->pp_cpq.ifq_head;
1179 if (m == NULL &&
1180 (sp->pp_phase == PHASE_NETWORK ||
1181 sp->pp_mode == IFF_CISCO ||
1182 sp->pp_mode == PP_FR))
1183 if ((m = sp->pp_fastq.ifq_head) == NULL)
1184 m = SP2IFP(sp)->if_snd.ifq_head;
1185 SPPP_UNLOCK(sp);
|
1203 splx (s);
| |
1204 return (m);
1205}
1206
1207/*
1208 * Process an ioctl request. Called on low priority level.
1209 */
1210int
1211sppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
1212{
1213 struct ifreq *ifr = (struct ifreq*) data;
1214 struct sppp *sp = IFP2SP(ifp);
| 1186 return (m);
1187}
1188
1189/*
1190 * Process an ioctl request. Called on low priority level.
1191 */
1192int
1193sppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
1194{
1195 struct ifreq *ifr = (struct ifreq*) data;
1196 struct sppp *sp = IFP2SP(ifp);
|
1215 int s, rv, going_up, going_down, newmode;
| 1197 int rv, going_up, going_down, newmode;
|
1216
| 1198
|
1217 s = splimp();
| |
1218 SPPP_LOCK(sp);
1219 rv = 0;
1220 switch (cmd) {
1221 case SIOCAIFADDR:
1222 case SIOCSIFDSTADDR:
1223 break;
1224
1225 case SIOCSIFADDR:
1226 /* set the interface "up" when assigning an IP address */
1227 ifp->if_flags |= IFF_UP;
1228 /* FALLTHROUGH */
1229
1230 case SIOCSIFFLAGS:
1231 going_up = ifp->if_flags & IFF_UP &&
1232 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0;
1233 going_down = (ifp->if_flags & IFF_UP) == 0 &&
1234 ifp->if_drv_flags & IFF_DRV_RUNNING;
1235
1236 newmode = ifp->if_flags & IFF_PASSIVE;
1237 if (!newmode)
1238 newmode = ifp->if_flags & IFF_AUTO;
1239 if (!newmode)
1240 newmode = ifp->if_flags & IFF_CISCO;
1241 ifp->if_flags &= ~(IFF_PASSIVE | IFF_AUTO | IFF_CISCO);
1242 ifp->if_flags |= newmode;
1243
1244 if (!newmode)
1245 newmode = sp->pp_flags & PP_FR;
1246
1247 if (newmode != sp->pp_mode) {
1248 going_down = 1;
1249 if (!going_up)
1250 going_up = ifp->if_drv_flags & IFF_DRV_RUNNING;
1251 }
1252
1253 if (going_down) {
1254 if (sp->pp_mode != IFF_CISCO &&
1255 sp->pp_mode != PP_FR)
1256 lcp.Close(sp);
1257 else if (sp->pp_tlf)
1258 (sp->pp_tlf)(sp);
1259 sppp_flush_unlocked(ifp);
1260 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1261 sp->pp_mode = newmode;
1262 }
1263
1264 if (going_up) {
1265 if (sp->pp_mode != IFF_CISCO &&
1266 sp->pp_mode != PP_FR)
1267 lcp.Close(sp);
1268 sp->pp_mode = newmode;
1269 if (sp->pp_mode == 0) {
1270 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1271 lcp.Open(sp);
1272 }
1273 if ((sp->pp_mode == IFF_CISCO) ||
1274 (sp->pp_mode == PP_FR)) {
1275 if (sp->pp_tls)
1276 (sp->pp_tls)(sp);
1277 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1278 }
1279 }
1280
1281 break;
1282
1283#ifdef SIOCSIFMTU
1284#ifndef ifr_mtu
1285#define ifr_mtu ifr_metric
1286#endif
1287 case SIOCSIFMTU:
1288 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru)
1289 return (EINVAL);
1290 ifp->if_mtu = ifr->ifr_mtu;
1291 break;
1292#endif
1293#ifdef SLIOCSETMTU
1294 case SLIOCSETMTU:
1295 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru)
1296 return (EINVAL);
1297 ifp->if_mtu = *(short*)data;
1298 break;
1299#endif
1300#ifdef SIOCGIFMTU
1301 case SIOCGIFMTU:
1302 ifr->ifr_mtu = ifp->if_mtu;
1303 break;
1304#endif
1305#ifdef SLIOCGETMTU
1306 case SLIOCGETMTU:
1307 *(short*)data = ifp->if_mtu;
1308 break;
1309#endif
1310 case SIOCADDMULTI:
1311 case SIOCDELMULTI:
1312 break;
1313
1314 case SIOCGIFGENERIC:
1315 case SIOCSIFGENERIC:
1316 rv = sppp_params(sp, cmd, data);
1317 break;
1318
1319 default:
1320 rv = ENOTTY;
1321 }
1322 SPPP_UNLOCK(sp);
| 1199 SPPP_LOCK(sp);
1200 rv = 0;
1201 switch (cmd) {
1202 case SIOCAIFADDR:
1203 case SIOCSIFDSTADDR:
1204 break;
1205
1206 case SIOCSIFADDR:
1207 /* set the interface "up" when assigning an IP address */
1208 ifp->if_flags |= IFF_UP;
1209 /* FALLTHROUGH */
1210
1211 case SIOCSIFFLAGS:
1212 going_up = ifp->if_flags & IFF_UP &&
1213 (ifp->if_drv_flags & IFF_DRV_RUNNING) == 0;
1214 going_down = (ifp->if_flags & IFF_UP) == 0 &&
1215 ifp->if_drv_flags & IFF_DRV_RUNNING;
1216
1217 newmode = ifp->if_flags & IFF_PASSIVE;
1218 if (!newmode)
1219 newmode = ifp->if_flags & IFF_AUTO;
1220 if (!newmode)
1221 newmode = ifp->if_flags & IFF_CISCO;
1222 ifp->if_flags &= ~(IFF_PASSIVE | IFF_AUTO | IFF_CISCO);
1223 ifp->if_flags |= newmode;
1224
1225 if (!newmode)
1226 newmode = sp->pp_flags & PP_FR;
1227
1228 if (newmode != sp->pp_mode) {
1229 going_down = 1;
1230 if (!going_up)
1231 going_up = ifp->if_drv_flags & IFF_DRV_RUNNING;
1232 }
1233
1234 if (going_down) {
1235 if (sp->pp_mode != IFF_CISCO &&
1236 sp->pp_mode != PP_FR)
1237 lcp.Close(sp);
1238 else if (sp->pp_tlf)
1239 (sp->pp_tlf)(sp);
1240 sppp_flush_unlocked(ifp);
1241 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1242 sp->pp_mode = newmode;
1243 }
1244
1245 if (going_up) {
1246 if (sp->pp_mode != IFF_CISCO &&
1247 sp->pp_mode != PP_FR)
1248 lcp.Close(sp);
1249 sp->pp_mode = newmode;
1250 if (sp->pp_mode == 0) {
1251 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1252 lcp.Open(sp);
1253 }
1254 if ((sp->pp_mode == IFF_CISCO) ||
1255 (sp->pp_mode == PP_FR)) {
1256 if (sp->pp_tls)
1257 (sp->pp_tls)(sp);
1258 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1259 }
1260 }
1261
1262 break;
1263
1264#ifdef SIOCSIFMTU
1265#ifndef ifr_mtu
1266#define ifr_mtu ifr_metric
1267#endif
1268 case SIOCSIFMTU:
1269 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru)
1270 return (EINVAL);
1271 ifp->if_mtu = ifr->ifr_mtu;
1272 break;
1273#endif
1274#ifdef SLIOCSETMTU
1275 case SLIOCSETMTU:
1276 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru)
1277 return (EINVAL);
1278 ifp->if_mtu = *(short*)data;
1279 break;
1280#endif
1281#ifdef SIOCGIFMTU
1282 case SIOCGIFMTU:
1283 ifr->ifr_mtu = ifp->if_mtu;
1284 break;
1285#endif
1286#ifdef SLIOCGETMTU
1287 case SLIOCGETMTU:
1288 *(short*)data = ifp->if_mtu;
1289 break;
1290#endif
1291 case SIOCADDMULTI:
1292 case SIOCDELMULTI:
1293 break;
1294
1295 case SIOCGIFGENERIC:
1296 case SIOCSIFGENERIC:
1297 rv = sppp_params(sp, cmd, data);
1298 break;
1299
1300 default:
1301 rv = ENOTTY;
1302 }
1303 SPPP_UNLOCK(sp);
|
1323 splx(s);
| |
1324 return rv;
1325}
1326
1327/*
1328 * Cisco framing implementation.
1329 */
1330
1331/*
1332 * Handle incoming Cisco keepalive protocol packets.
1333 */
1334static void
1335sppp_cisco_input(struct sppp *sp, struct mbuf *m)
1336{
1337 STDDCL;
1338 struct cisco_packet *h;
1339 u_long me, mymask;
1340
1341 if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
1342 if (debug)
1343 log(LOG_DEBUG,
1344 SPP_FMT "cisco invalid packet length: %d bytes\n",
1345 SPP_ARGS(ifp), m->m_pkthdr.len);
1346 return;
1347 }
1348 h = mtod (m, struct cisco_packet*);
1349 if (debug)
1350 log(LOG_DEBUG,
1351 SPP_FMT "cisco input: %d bytes "
1352 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1353 SPP_ARGS(ifp), m->m_pkthdr.len,
1354 (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel,
1355 (u_int)h->time0, (u_int)h->time1);
1356 switch (ntohl (h->type)) {
1357 default:
1358 if (debug)
1359 log(-1, SPP_FMT "cisco unknown packet type: 0x%lx\n",
1360 SPP_ARGS(ifp), (u_long)ntohl (h->type));
1361 break;
1362 case CISCO_ADDR_REPLY:
1363 /* Reply on address request, ignore */
1364 break;
1365 case CISCO_KEEPALIVE_REQ:
1366 sp->pp_alivecnt = 0;
1367 sp->pp_rseq[IDX_LCP] = ntohl (h->par1);
1368 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) {
1369 /* Local and remote sequence numbers are equal.
1370 * Probably, the line is in loopback mode. */
1371 if (sp->pp_loopcnt >= MAXALIVECNT) {
1372 printf (SPP_FMT "loopback\n",
1373 SPP_ARGS(ifp));
1374 sp->pp_loopcnt = 0;
1375 if (ifp->if_flags & IFF_UP) {
1376 if_down (ifp);
1377 sppp_qflush (&sp->pp_cpq);
1378 }
1379 }
1380 ++sp->pp_loopcnt;
1381
1382 /* Generate new local sequence number */
1383 sp->pp_seq[IDX_LCP] = random();
1384 break;
1385 }
1386 sp->pp_loopcnt = 0;
1387 if (! (ifp->if_flags & IFF_UP) &&
1388 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1389 if_up(ifp);
1390 printf (SPP_FMT "up\n", SPP_ARGS(ifp));
1391 }
1392 break;
1393 case CISCO_ADDR_REQ:
1394 sppp_get_ip_addrs(sp, &me, 0, &mymask);
1395 if (me != 0L)
1396 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
1397 break;
1398 }
1399}
1400
1401/*
1402 * Send Cisco keepalive packet.
1403 */
1404static void
1405sppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
1406{
1407 STDDCL;
1408 struct ppp_header *h;
1409 struct cisco_packet *ch;
1410 struct mbuf *m;
1411 struct timeval tv;
1412
1413 getmicrouptime(&tv);
1414
1415 MGETHDR (m, M_DONTWAIT, MT_DATA);
1416 if (! m)
1417 return;
1418 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
1419 m->m_pkthdr.rcvif = 0;
1420
1421 h = mtod (m, struct ppp_header*);
1422 h->address = CISCO_MULTICAST;
1423 h->control = 0;
1424 h->protocol = htons (CISCO_KEEPALIVE);
1425
1426 ch = (struct cisco_packet*) (h + 1);
1427 ch->type = htonl (type);
1428 ch->par1 = htonl (par1);
1429 ch->par2 = htonl (par2);
1430 ch->rel = -1;
1431
1432 ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
1433 ch->time1 = htons ((u_short) tv.tv_sec);
1434
1435 if (debug)
1436 log(LOG_DEBUG,
1437 SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1438 SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1,
1439 (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
1440
1441 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
1442 ifp->if_oerrors++;
1443}
1444
1445/*
1446 * PPP protocol implementation.
1447 */
1448
1449/*
1450 * Send PPP control protocol packet.
1451 */
1452static void
1453sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
1454 u_char ident, u_short len, void *data)
1455{
1456 STDDCL;
1457 struct ppp_header *h;
1458 struct lcp_header *lh;
1459 struct mbuf *m;
1460
1461 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
1462 len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
1463 MGETHDR (m, M_DONTWAIT, MT_DATA);
1464 if (! m)
1465 return;
1466 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
1467 m->m_pkthdr.rcvif = 0;
1468
1469 h = mtod (m, struct ppp_header*);
1470 h->address = PPP_ALLSTATIONS; /* broadcast address */
1471 h->control = PPP_UI; /* Unnumbered Info */
1472 h->protocol = htons (proto); /* Link Control Protocol */
1473
1474 lh = (struct lcp_header*) (h + 1);
1475 lh->type = type;
1476 lh->ident = ident;
1477 lh->len = htons (LCP_HEADER_LEN + len);
1478 if (len)
1479 bcopy (data, lh+1, len);
1480
1481 if (debug) {
1482 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
1483 SPP_ARGS(ifp),
1484 sppp_proto_name(proto),
1485 sppp_cp_type_name (lh->type), lh->ident,
1486 ntohs (lh->len));
1487 sppp_print_bytes ((u_char*) (lh+1), len);
1488 log(-1, ">\n");
1489 }
1490 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
1491 ifp->if_oerrors++;
1492}
1493
1494/*
1495 * Handle incoming PPP control protocol packets.
1496 */
1497static void
1498sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
1499{
1500 STDDCL;
1501 struct lcp_header *h;
1502 int len = m->m_pkthdr.len;
1503 int rv;
1504 u_char *p;
1505
1506 if (len < 4) {
1507 if (debug)
1508 log(LOG_DEBUG,
1509 SPP_FMT "%s invalid packet length: %d bytes\n",
1510 SPP_ARGS(ifp), cp->name, len);
1511 return;
1512 }
1513 h = mtod (m, struct lcp_header*);
1514 if (debug) {
1515 log(LOG_DEBUG,
1516 SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
1517 SPP_ARGS(ifp), cp->name,
1518 sppp_state_name(sp->state[cp->protoidx]),
1519 sppp_cp_type_name (h->type), h->ident, ntohs (h->len));
1520 sppp_print_bytes ((u_char*) (h+1), len-4);
1521 log(-1, ">\n");
1522 }
1523 if (len > ntohs (h->len))
1524 len = ntohs (h->len);
1525 p = (u_char *)(h + 1);
1526 switch (h->type) {
1527 case CONF_REQ:
1528 if (len < 4) {
1529 if (debug)
1530 log(-1, SPP_FMT "%s invalid conf-req length %d\n",
1531 SPP_ARGS(ifp), cp->name,
1532 len);
1533 ++ifp->if_ierrors;
1534 break;
1535 }
1536 /* handle states where RCR doesn't get a SCA/SCN */
1537 switch (sp->state[cp->protoidx]) {
1538 case STATE_CLOSING:
1539 case STATE_STOPPING:
1540 return;
1541 case STATE_CLOSED:
1542 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
1543 0, 0);
1544 return;
1545 }
1546 rv = (cp->RCR)(sp, h, len);
1547 switch (sp->state[cp->protoidx]) {
1548 case STATE_OPENED:
1549 (cp->tld)(sp);
1550 (cp->scr)(sp);
1551 /* FALLTHROUGH */
1552 case STATE_ACK_SENT:
1553 case STATE_REQ_SENT:
1554 /*
1555 * sppp_cp_change_state() have the side effect of
1556 * restarting the timeouts. We want to avoid that
1557 * if the state don't change, otherwise we won't
1558 * ever timeout and resend a configuration request
1559 * that got lost.
1560 */
1561 if (sp->state[cp->protoidx] == (rv ? STATE_ACK_SENT:
1562 STATE_REQ_SENT))
1563 break;
1564 sppp_cp_change_state(cp, sp, rv?
1565 STATE_ACK_SENT: STATE_REQ_SENT);
1566 break;
1567 case STATE_STOPPED:
1568 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1569 (cp->scr)(sp);
1570 sppp_cp_change_state(cp, sp, rv?
1571 STATE_ACK_SENT: STATE_REQ_SENT);
1572 break;
1573 case STATE_ACK_RCVD:
1574 if (rv) {
1575 sppp_cp_change_state(cp, sp, STATE_OPENED);
1576 if (debug)
1577 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1578 SPP_ARGS(ifp),
1579 cp->name);
1580 (cp->tlu)(sp);
1581 } else
1582 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1583 break;
1584 default:
1585 printf(SPP_FMT "%s illegal %s in state %s\n",
1586 SPP_ARGS(ifp), cp->name,
1587 sppp_cp_type_name(h->type),
1588 sppp_state_name(sp->state[cp->protoidx]));
1589 ++ifp->if_ierrors;
1590 }
1591 break;
1592 case CONF_ACK:
1593 if (h->ident != sp->confid[cp->protoidx]) {
1594 if (debug)
1595 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1596 SPP_ARGS(ifp), cp->name,
1597 h->ident, sp->confid[cp->protoidx]);
1598 ++ifp->if_ierrors;
1599 break;
1600 }
1601 switch (sp->state[cp->protoidx]) {
1602 case STATE_CLOSED:
1603 case STATE_STOPPED:
1604 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1605 break;
1606 case STATE_CLOSING:
1607 case STATE_STOPPING:
1608 break;
1609 case STATE_REQ_SENT:
1610 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1611 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1612 break;
1613 case STATE_OPENED:
1614 (cp->tld)(sp);
1615 /* FALLTHROUGH */
1616 case STATE_ACK_RCVD:
1617 (cp->scr)(sp);
1618 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1619 break;
1620 case STATE_ACK_SENT:
1621 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1622 sppp_cp_change_state(cp, sp, STATE_OPENED);
1623 if (debug)
1624 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1625 SPP_ARGS(ifp), cp->name);
1626 (cp->tlu)(sp);
1627 break;
1628 default:
1629 printf(SPP_FMT "%s illegal %s in state %s\n",
1630 SPP_ARGS(ifp), cp->name,
1631 sppp_cp_type_name(h->type),
1632 sppp_state_name(sp->state[cp->protoidx]));
1633 ++ifp->if_ierrors;
1634 }
1635 break;
1636 case CONF_NAK:
1637 case CONF_REJ:
1638 if (h->ident != sp->confid[cp->protoidx]) {
1639 if (debug)
1640 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1641 SPP_ARGS(ifp), cp->name,
1642 h->ident, sp->confid[cp->protoidx]);
1643 ++ifp->if_ierrors;
1644 break;
1645 }
1646 if (h->type == CONF_NAK)
1647 (cp->RCN_nak)(sp, h, len);
1648 else /* CONF_REJ */
1649 (cp->RCN_rej)(sp, h, len);
1650
1651 switch (sp->state[cp->protoidx]) {
1652 case STATE_CLOSED:
1653 case STATE_STOPPED:
1654 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1655 break;
1656 case STATE_REQ_SENT:
1657 case STATE_ACK_SENT:
1658 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1659 /*
1660 * Slow things down a bit if we think we might be
1661 * in loopback. Depend on the timeout to send the
1662 * next configuration request.
1663 */
1664 if (sp->pp_loopcnt)
1665 break;
1666 (cp->scr)(sp);
1667 break;
1668 case STATE_OPENED:
1669 (cp->tld)(sp);
1670 /* FALLTHROUGH */
1671 case STATE_ACK_RCVD:
1672 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1673 (cp->scr)(sp);
1674 break;
1675 case STATE_CLOSING:
1676 case STATE_STOPPING:
1677 break;
1678 default:
1679 printf(SPP_FMT "%s illegal %s in state %s\n",
1680 SPP_ARGS(ifp), cp->name,
1681 sppp_cp_type_name(h->type),
1682 sppp_state_name(sp->state[cp->protoidx]));
1683 ++ifp->if_ierrors;
1684 }
1685 break;
1686
1687 case TERM_REQ:
1688 switch (sp->state[cp->protoidx]) {
1689 case STATE_ACK_RCVD:
1690 case STATE_ACK_SENT:
1691 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1692 /* FALLTHROUGH */
1693 case STATE_CLOSED:
1694 case STATE_STOPPED:
1695 case STATE_CLOSING:
1696 case STATE_STOPPING:
1697 case STATE_REQ_SENT:
1698 sta:
1699 /* Send Terminate-Ack packet. */
1700 if (debug)
1701 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
1702 SPP_ARGS(ifp), cp->name);
1703 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1704 break;
1705 case STATE_OPENED:
1706 (cp->tld)(sp);
1707 sp->rst_counter[cp->protoidx] = 0;
1708 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1709 goto sta;
1710 break;
1711 default:
1712 printf(SPP_FMT "%s illegal %s in state %s\n",
1713 SPP_ARGS(ifp), cp->name,
1714 sppp_cp_type_name(h->type),
1715 sppp_state_name(sp->state[cp->protoidx]));
1716 ++ifp->if_ierrors;
1717 }
1718 break;
1719 case TERM_ACK:
1720 switch (sp->state[cp->protoidx]) {
1721 case STATE_CLOSED:
1722 case STATE_STOPPED:
1723 case STATE_REQ_SENT:
1724 case STATE_ACK_SENT:
1725 break;
1726 case STATE_CLOSING:
1727 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1728 (cp->tlf)(sp);
1729 break;
1730 case STATE_STOPPING:
1731 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1732 (cp->tlf)(sp);
1733 break;
1734 case STATE_ACK_RCVD:
1735 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1736 break;
1737 case STATE_OPENED:
1738 (cp->tld)(sp);
1739 (cp->scr)(sp);
1740 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1741 break;
1742 default:
1743 printf(SPP_FMT "%s illegal %s in state %s\n",
1744 SPP_ARGS(ifp), cp->name,
1745 sppp_cp_type_name(h->type),
1746 sppp_state_name(sp->state[cp->protoidx]));
1747 ++ifp->if_ierrors;
1748 }
1749 break;
1750 case CODE_REJ:
1751 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1752 log(LOG_INFO,
1753 SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
1754 "danger will robinson\n",
1755 SPP_ARGS(ifp), cp->name,
1756 sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
1757 switch (sp->state[cp->protoidx]) {
1758 case STATE_CLOSED:
1759 case STATE_STOPPED:
1760 case STATE_REQ_SENT:
1761 case STATE_ACK_SENT:
1762 case STATE_CLOSING:
1763 case STATE_STOPPING:
1764 case STATE_OPENED:
1765 break;
1766 case STATE_ACK_RCVD:
1767 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1768 break;
1769 default:
1770 printf(SPP_FMT "%s illegal %s in state %s\n",
1771 SPP_ARGS(ifp), cp->name,
1772 sppp_cp_type_name(h->type),
1773 sppp_state_name(sp->state[cp->protoidx]));
1774 ++ifp->if_ierrors;
1775 }
1776 break;
1777 case PROTO_REJ:
1778 {
1779 int catastrophic;
1780 const struct cp *upper;
1781 int i;
1782 u_int16_t proto;
1783
1784 catastrophic = 0;
1785 upper = NULL;
1786 proto = ntohs(*((u_int16_t *)p));
1787 for (i = 0; i < IDX_COUNT; i++) {
1788 if (cps[i]->proto == proto) {
1789 upper = cps[i];
1790 break;
1791 }
1792 }
1793 if (upper == NULL)
1794 catastrophic++;
1795
1796 if (catastrophic || debug)
1797 log(catastrophic? LOG_INFO: LOG_DEBUG,
1798 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n",
1799 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+',
1800 sppp_cp_type_name(h->type), proto,
1801 upper ? upper->name : "unknown",
1802 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?");
1803
1804 /*
1805 * if we got RXJ+ against conf-req, the peer does not implement
1806 * this particular protocol type. terminate the protocol.
1807 */
1808 if (upper && !catastrophic) {
1809 if (sp->state[upper->protoidx] == STATE_REQ_SENT) {
1810 upper->Close(sp);
1811 break;
1812 }
1813 }
1814
1815 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1816 switch (sp->state[cp->protoidx]) {
1817 case STATE_CLOSED:
1818 case STATE_STOPPED:
1819 case STATE_REQ_SENT:
1820 case STATE_ACK_SENT:
1821 case STATE_CLOSING:
1822 case STATE_STOPPING:
1823 case STATE_OPENED:
1824 break;
1825 case STATE_ACK_RCVD:
1826 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1827 break;
1828 default:
1829 printf(SPP_FMT "%s illegal %s in state %s\n",
1830 SPP_ARGS(ifp), cp->name,
1831 sppp_cp_type_name(h->type),
1832 sppp_state_name(sp->state[cp->protoidx]));
1833 ++ifp->if_ierrors;
1834 }
1835 break;
1836 }
1837 case DISC_REQ:
1838 if (cp->proto != PPP_LCP)
1839 goto illegal;
1840 /* Discard the packet. */
1841 break;
1842 case ECHO_REQ:
1843 if (cp->proto != PPP_LCP)
1844 goto illegal;
1845 if (sp->state[cp->protoidx] != STATE_OPENED) {
1846 if (debug)
1847 log(-1, SPP_FMT "lcp echo req but lcp closed\n",
1848 SPP_ARGS(ifp));
1849 ++ifp->if_ierrors;
1850 break;
1851 }
1852 if (len < 8) {
1853 if (debug)
1854 log(-1, SPP_FMT "invalid lcp echo request "
1855 "packet length: %d bytes\n",
1856 SPP_ARGS(ifp), len);
1857 break;
1858 }
1859 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
1860 ntohl (*(long*)(h+1)) == sp->lcp.magic) {
1861 /* Line loopback mode detected. */
1862 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
1863 sp->pp_loopcnt = MAXALIVECNT * 5;
1864 if_down (ifp);
1865 sppp_qflush (&sp->pp_cpq);
1866
1867 /* Shut down the PPP link. */
1868 /* XXX */
1869 lcp.Down(sp);
1870 lcp.Up(sp);
1871 break;
1872 }
1873 *(long*)(h+1) = htonl (sp->lcp.magic);
1874 if (debug)
1875 log(-1, SPP_FMT "got lcp echo req, sending echo rep\n",
1876 SPP_ARGS(ifp));
1877 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
1878 break;
1879 case ECHO_REPLY:
1880 if (cp->proto != PPP_LCP)
1881 goto illegal;
1882 if (h->ident != sp->lcp.echoid) {
1883 ++ifp->if_ierrors;
1884 break;
1885 }
1886 if (len < 8) {
1887 if (debug)
1888 log(-1, SPP_FMT "lcp invalid echo reply "
1889 "packet length: %d bytes\n",
1890 SPP_ARGS(ifp), len);
1891 break;
1892 }
1893 if (debug)
1894 log(-1, SPP_FMT "lcp got echo rep\n",
1895 SPP_ARGS(ifp));
1896 if (!(sp->lcp.opts & (1 << LCP_OPT_MAGIC)) ||
1897 ntohl (*(long*)(h+1)) != sp->lcp.magic)
1898 sp->pp_alivecnt = 0;
1899 break;
1900 default:
1901 /* Unknown packet type -- send Code-Reject packet. */
1902 illegal:
1903 if (debug)
1904 log(-1, SPP_FMT "%s send code-rej for 0x%x\n",
1905 SPP_ARGS(ifp), cp->name, h->type);
1906 sppp_cp_send(sp, cp->proto, CODE_REJ,
1907 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h);
1908 ++ifp->if_ierrors;
1909 }
1910}
1911
1912
1913/*
1914 * The generic part of all Up/Down/Open/Close/TO event handlers.
1915 * Basically, the state transition handling in the automaton.
1916 */
1917static void
1918sppp_up_event(const struct cp *cp, struct sppp *sp)
1919{
1920 STDDCL;
1921
1922 if (debug)
1923 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
1924 SPP_ARGS(ifp), cp->name,
1925 sppp_state_name(sp->state[cp->protoidx]));
1926
1927 switch (sp->state[cp->protoidx]) {
1928 case STATE_INITIAL:
1929 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1930 break;
1931 case STATE_STARTING:
1932 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1933 (cp->scr)(sp);
1934 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1935 break;
1936 default:
1937 printf(SPP_FMT "%s illegal up in state %s\n",
1938 SPP_ARGS(ifp), cp->name,
1939 sppp_state_name(sp->state[cp->protoidx]));
1940 }
1941}
1942
1943static void
1944sppp_down_event(const struct cp *cp, struct sppp *sp)
1945{
1946 STDDCL;
1947
1948 if (debug)
1949 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
1950 SPP_ARGS(ifp), cp->name,
1951 sppp_state_name(sp->state[cp->protoidx]));
1952
1953 switch (sp->state[cp->protoidx]) {
1954 case STATE_CLOSED:
1955 case STATE_CLOSING:
1956 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1957 break;
1958 case STATE_STOPPED:
1959 sppp_cp_change_state(cp, sp, STATE_STARTING);
1960 (cp->tls)(sp);
1961 break;
1962 case STATE_STOPPING:
1963 case STATE_REQ_SENT:
1964 case STATE_ACK_RCVD:
1965 case STATE_ACK_SENT:
1966 sppp_cp_change_state(cp, sp, STATE_STARTING);
1967 break;
1968 case STATE_OPENED:
1969 (cp->tld)(sp);
1970 sppp_cp_change_state(cp, sp, STATE_STARTING);
1971 break;
1972 default:
1973 printf(SPP_FMT "%s illegal down in state %s\n",
1974 SPP_ARGS(ifp), cp->name,
1975 sppp_state_name(sp->state[cp->protoidx]));
1976 }
1977}
1978
1979
1980static void
1981sppp_open_event(const struct cp *cp, struct sppp *sp)
1982{
1983 STDDCL;
1984
1985 if (debug)
1986 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
1987 SPP_ARGS(ifp), cp->name,
1988 sppp_state_name(sp->state[cp->protoidx]));
1989
1990 switch (sp->state[cp->protoidx]) {
1991 case STATE_INITIAL:
1992 sppp_cp_change_state(cp, sp, STATE_STARTING);
1993 (cp->tls)(sp);
1994 break;
1995 case STATE_STARTING:
1996 break;
1997 case STATE_CLOSED:
1998 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1999 (cp->scr)(sp);
2000 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
2001 break;
2002 case STATE_STOPPED:
2003 /*
2004 * Try escaping stopped state. This seems to bite
2005 * people occasionally, in particular for IPCP,
2006 * presumably following previous IPCP negotiation
2007 * aborts. Somehow, we must have missed a Down event
2008 * which would have caused a transition into starting
2009 * state, so as a bandaid we force the Down event now.
2010 * This effectively implements (something like the)
2011 * `restart' option mentioned in the state transition
2012 * table of RFC 1661.
2013 */
2014 sppp_cp_change_state(cp, sp, STATE_STARTING);
2015 (cp->tls)(sp);
2016 break;
2017 case STATE_STOPPING:
2018 case STATE_REQ_SENT:
2019 case STATE_ACK_RCVD:
2020 case STATE_ACK_SENT:
2021 case STATE_OPENED:
2022 break;
2023 case STATE_CLOSING:
2024 sppp_cp_change_state(cp, sp, STATE_STOPPING);
2025 break;
2026 }
2027}
2028
2029
2030static void
2031sppp_close_event(const struct cp *cp, struct sppp *sp)
2032{
2033 STDDCL;
2034
2035 if (debug)
2036 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
2037 SPP_ARGS(ifp), cp->name,
2038 sppp_state_name(sp->state[cp->protoidx]));
2039
2040 switch (sp->state[cp->protoidx]) {
2041 case STATE_INITIAL:
2042 case STATE_CLOSED:
2043 case STATE_CLOSING:
2044 break;
2045 case STATE_STARTING:
2046 sppp_cp_change_state(cp, sp, STATE_INITIAL);
2047 (cp->tlf)(sp);
2048 break;
2049 case STATE_STOPPED:
2050 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2051 break;
2052 case STATE_STOPPING:
2053 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2054 break;
2055 case STATE_OPENED:
2056 (cp->tld)(sp);
2057 /* FALLTHROUGH */
2058 case STATE_REQ_SENT:
2059 case STATE_ACK_RCVD:
2060 case STATE_ACK_SENT:
2061 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
2062 sppp_cp_send(sp, cp->proto, TERM_REQ,
2063 ++sp->pp_seq[cp->protoidx], 0, 0);
2064 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2065 break;
2066 }
2067}
2068
2069static void
2070sppp_to_event(const struct cp *cp, struct sppp *sp)
2071{
2072 STDDCL;
| 1304 return rv;
1305}
1306
1307/*
1308 * Cisco framing implementation.
1309 */
1310
1311/*
1312 * Handle incoming Cisco keepalive protocol packets.
1313 */
1314static void
1315sppp_cisco_input(struct sppp *sp, struct mbuf *m)
1316{
1317 STDDCL;
1318 struct cisco_packet *h;
1319 u_long me, mymask;
1320
1321 if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
1322 if (debug)
1323 log(LOG_DEBUG,
1324 SPP_FMT "cisco invalid packet length: %d bytes\n",
1325 SPP_ARGS(ifp), m->m_pkthdr.len);
1326 return;
1327 }
1328 h = mtod (m, struct cisco_packet*);
1329 if (debug)
1330 log(LOG_DEBUG,
1331 SPP_FMT "cisco input: %d bytes "
1332 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1333 SPP_ARGS(ifp), m->m_pkthdr.len,
1334 (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel,
1335 (u_int)h->time0, (u_int)h->time1);
1336 switch (ntohl (h->type)) {
1337 default:
1338 if (debug)
1339 log(-1, SPP_FMT "cisco unknown packet type: 0x%lx\n",
1340 SPP_ARGS(ifp), (u_long)ntohl (h->type));
1341 break;
1342 case CISCO_ADDR_REPLY:
1343 /* Reply on address request, ignore */
1344 break;
1345 case CISCO_KEEPALIVE_REQ:
1346 sp->pp_alivecnt = 0;
1347 sp->pp_rseq[IDX_LCP] = ntohl (h->par1);
1348 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) {
1349 /* Local and remote sequence numbers are equal.
1350 * Probably, the line is in loopback mode. */
1351 if (sp->pp_loopcnt >= MAXALIVECNT) {
1352 printf (SPP_FMT "loopback\n",
1353 SPP_ARGS(ifp));
1354 sp->pp_loopcnt = 0;
1355 if (ifp->if_flags & IFF_UP) {
1356 if_down (ifp);
1357 sppp_qflush (&sp->pp_cpq);
1358 }
1359 }
1360 ++sp->pp_loopcnt;
1361
1362 /* Generate new local sequence number */
1363 sp->pp_seq[IDX_LCP] = random();
1364 break;
1365 }
1366 sp->pp_loopcnt = 0;
1367 if (! (ifp->if_flags & IFF_UP) &&
1368 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
1369 if_up(ifp);
1370 printf (SPP_FMT "up\n", SPP_ARGS(ifp));
1371 }
1372 break;
1373 case CISCO_ADDR_REQ:
1374 sppp_get_ip_addrs(sp, &me, 0, &mymask);
1375 if (me != 0L)
1376 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
1377 break;
1378 }
1379}
1380
1381/*
1382 * Send Cisco keepalive packet.
1383 */
1384static void
1385sppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
1386{
1387 STDDCL;
1388 struct ppp_header *h;
1389 struct cisco_packet *ch;
1390 struct mbuf *m;
1391 struct timeval tv;
1392
1393 getmicrouptime(&tv);
1394
1395 MGETHDR (m, M_DONTWAIT, MT_DATA);
1396 if (! m)
1397 return;
1398 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
1399 m->m_pkthdr.rcvif = 0;
1400
1401 h = mtod (m, struct ppp_header*);
1402 h->address = CISCO_MULTICAST;
1403 h->control = 0;
1404 h->protocol = htons (CISCO_KEEPALIVE);
1405
1406 ch = (struct cisco_packet*) (h + 1);
1407 ch->type = htonl (type);
1408 ch->par1 = htonl (par1);
1409 ch->par2 = htonl (par2);
1410 ch->rel = -1;
1411
1412 ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
1413 ch->time1 = htons ((u_short) tv.tv_sec);
1414
1415 if (debug)
1416 log(LOG_DEBUG,
1417 SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1418 SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1,
1419 (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
1420
1421 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
1422 ifp->if_oerrors++;
1423}
1424
1425/*
1426 * PPP protocol implementation.
1427 */
1428
1429/*
1430 * Send PPP control protocol packet.
1431 */
1432static void
1433sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
1434 u_char ident, u_short len, void *data)
1435{
1436 STDDCL;
1437 struct ppp_header *h;
1438 struct lcp_header *lh;
1439 struct mbuf *m;
1440
1441 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
1442 len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
1443 MGETHDR (m, M_DONTWAIT, MT_DATA);
1444 if (! m)
1445 return;
1446 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
1447 m->m_pkthdr.rcvif = 0;
1448
1449 h = mtod (m, struct ppp_header*);
1450 h->address = PPP_ALLSTATIONS; /* broadcast address */
1451 h->control = PPP_UI; /* Unnumbered Info */
1452 h->protocol = htons (proto); /* Link Control Protocol */
1453
1454 lh = (struct lcp_header*) (h + 1);
1455 lh->type = type;
1456 lh->ident = ident;
1457 lh->len = htons (LCP_HEADER_LEN + len);
1458 if (len)
1459 bcopy (data, lh+1, len);
1460
1461 if (debug) {
1462 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
1463 SPP_ARGS(ifp),
1464 sppp_proto_name(proto),
1465 sppp_cp_type_name (lh->type), lh->ident,
1466 ntohs (lh->len));
1467 sppp_print_bytes ((u_char*) (lh+1), len);
1468 log(-1, ">\n");
1469 }
1470 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
1471 ifp->if_oerrors++;
1472}
1473
1474/*
1475 * Handle incoming PPP control protocol packets.
1476 */
1477static void
1478sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
1479{
1480 STDDCL;
1481 struct lcp_header *h;
1482 int len = m->m_pkthdr.len;
1483 int rv;
1484 u_char *p;
1485
1486 if (len < 4) {
1487 if (debug)
1488 log(LOG_DEBUG,
1489 SPP_FMT "%s invalid packet length: %d bytes\n",
1490 SPP_ARGS(ifp), cp->name, len);
1491 return;
1492 }
1493 h = mtod (m, struct lcp_header*);
1494 if (debug) {
1495 log(LOG_DEBUG,
1496 SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
1497 SPP_ARGS(ifp), cp->name,
1498 sppp_state_name(sp->state[cp->protoidx]),
1499 sppp_cp_type_name (h->type), h->ident, ntohs (h->len));
1500 sppp_print_bytes ((u_char*) (h+1), len-4);
1501 log(-1, ">\n");
1502 }
1503 if (len > ntohs (h->len))
1504 len = ntohs (h->len);
1505 p = (u_char *)(h + 1);
1506 switch (h->type) {
1507 case CONF_REQ:
1508 if (len < 4) {
1509 if (debug)
1510 log(-1, SPP_FMT "%s invalid conf-req length %d\n",
1511 SPP_ARGS(ifp), cp->name,
1512 len);
1513 ++ifp->if_ierrors;
1514 break;
1515 }
1516 /* handle states where RCR doesn't get a SCA/SCN */
1517 switch (sp->state[cp->protoidx]) {
1518 case STATE_CLOSING:
1519 case STATE_STOPPING:
1520 return;
1521 case STATE_CLOSED:
1522 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
1523 0, 0);
1524 return;
1525 }
1526 rv = (cp->RCR)(sp, h, len);
1527 switch (sp->state[cp->protoidx]) {
1528 case STATE_OPENED:
1529 (cp->tld)(sp);
1530 (cp->scr)(sp);
1531 /* FALLTHROUGH */
1532 case STATE_ACK_SENT:
1533 case STATE_REQ_SENT:
1534 /*
1535 * sppp_cp_change_state() have the side effect of
1536 * restarting the timeouts. We want to avoid that
1537 * if the state don't change, otherwise we won't
1538 * ever timeout and resend a configuration request
1539 * that got lost.
1540 */
1541 if (sp->state[cp->protoidx] == (rv ? STATE_ACK_SENT:
1542 STATE_REQ_SENT))
1543 break;
1544 sppp_cp_change_state(cp, sp, rv?
1545 STATE_ACK_SENT: STATE_REQ_SENT);
1546 break;
1547 case STATE_STOPPED:
1548 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1549 (cp->scr)(sp);
1550 sppp_cp_change_state(cp, sp, rv?
1551 STATE_ACK_SENT: STATE_REQ_SENT);
1552 break;
1553 case STATE_ACK_RCVD:
1554 if (rv) {
1555 sppp_cp_change_state(cp, sp, STATE_OPENED);
1556 if (debug)
1557 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1558 SPP_ARGS(ifp),
1559 cp->name);
1560 (cp->tlu)(sp);
1561 } else
1562 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1563 break;
1564 default:
1565 printf(SPP_FMT "%s illegal %s in state %s\n",
1566 SPP_ARGS(ifp), cp->name,
1567 sppp_cp_type_name(h->type),
1568 sppp_state_name(sp->state[cp->protoidx]));
1569 ++ifp->if_ierrors;
1570 }
1571 break;
1572 case CONF_ACK:
1573 if (h->ident != sp->confid[cp->protoidx]) {
1574 if (debug)
1575 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1576 SPP_ARGS(ifp), cp->name,
1577 h->ident, sp->confid[cp->protoidx]);
1578 ++ifp->if_ierrors;
1579 break;
1580 }
1581 switch (sp->state[cp->protoidx]) {
1582 case STATE_CLOSED:
1583 case STATE_STOPPED:
1584 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1585 break;
1586 case STATE_CLOSING:
1587 case STATE_STOPPING:
1588 break;
1589 case STATE_REQ_SENT:
1590 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1591 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1592 break;
1593 case STATE_OPENED:
1594 (cp->tld)(sp);
1595 /* FALLTHROUGH */
1596 case STATE_ACK_RCVD:
1597 (cp->scr)(sp);
1598 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1599 break;
1600 case STATE_ACK_SENT:
1601 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1602 sppp_cp_change_state(cp, sp, STATE_OPENED);
1603 if (debug)
1604 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1605 SPP_ARGS(ifp), cp->name);
1606 (cp->tlu)(sp);
1607 break;
1608 default:
1609 printf(SPP_FMT "%s illegal %s in state %s\n",
1610 SPP_ARGS(ifp), cp->name,
1611 sppp_cp_type_name(h->type),
1612 sppp_state_name(sp->state[cp->protoidx]));
1613 ++ifp->if_ierrors;
1614 }
1615 break;
1616 case CONF_NAK:
1617 case CONF_REJ:
1618 if (h->ident != sp->confid[cp->protoidx]) {
1619 if (debug)
1620 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1621 SPP_ARGS(ifp), cp->name,
1622 h->ident, sp->confid[cp->protoidx]);
1623 ++ifp->if_ierrors;
1624 break;
1625 }
1626 if (h->type == CONF_NAK)
1627 (cp->RCN_nak)(sp, h, len);
1628 else /* CONF_REJ */
1629 (cp->RCN_rej)(sp, h, len);
1630
1631 switch (sp->state[cp->protoidx]) {
1632 case STATE_CLOSED:
1633 case STATE_STOPPED:
1634 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1635 break;
1636 case STATE_REQ_SENT:
1637 case STATE_ACK_SENT:
1638 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1639 /*
1640 * Slow things down a bit if we think we might be
1641 * in loopback. Depend on the timeout to send the
1642 * next configuration request.
1643 */
1644 if (sp->pp_loopcnt)
1645 break;
1646 (cp->scr)(sp);
1647 break;
1648 case STATE_OPENED:
1649 (cp->tld)(sp);
1650 /* FALLTHROUGH */
1651 case STATE_ACK_RCVD:
1652 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1653 (cp->scr)(sp);
1654 break;
1655 case STATE_CLOSING:
1656 case STATE_STOPPING:
1657 break;
1658 default:
1659 printf(SPP_FMT "%s illegal %s in state %s\n",
1660 SPP_ARGS(ifp), cp->name,
1661 sppp_cp_type_name(h->type),
1662 sppp_state_name(sp->state[cp->protoidx]));
1663 ++ifp->if_ierrors;
1664 }
1665 break;
1666
1667 case TERM_REQ:
1668 switch (sp->state[cp->protoidx]) {
1669 case STATE_ACK_RCVD:
1670 case STATE_ACK_SENT:
1671 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1672 /* FALLTHROUGH */
1673 case STATE_CLOSED:
1674 case STATE_STOPPED:
1675 case STATE_CLOSING:
1676 case STATE_STOPPING:
1677 case STATE_REQ_SENT:
1678 sta:
1679 /* Send Terminate-Ack packet. */
1680 if (debug)
1681 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
1682 SPP_ARGS(ifp), cp->name);
1683 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1684 break;
1685 case STATE_OPENED:
1686 (cp->tld)(sp);
1687 sp->rst_counter[cp->protoidx] = 0;
1688 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1689 goto sta;
1690 break;
1691 default:
1692 printf(SPP_FMT "%s illegal %s in state %s\n",
1693 SPP_ARGS(ifp), cp->name,
1694 sppp_cp_type_name(h->type),
1695 sppp_state_name(sp->state[cp->protoidx]));
1696 ++ifp->if_ierrors;
1697 }
1698 break;
1699 case TERM_ACK:
1700 switch (sp->state[cp->protoidx]) {
1701 case STATE_CLOSED:
1702 case STATE_STOPPED:
1703 case STATE_REQ_SENT:
1704 case STATE_ACK_SENT:
1705 break;
1706 case STATE_CLOSING:
1707 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1708 (cp->tlf)(sp);
1709 break;
1710 case STATE_STOPPING:
1711 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1712 (cp->tlf)(sp);
1713 break;
1714 case STATE_ACK_RCVD:
1715 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1716 break;
1717 case STATE_OPENED:
1718 (cp->tld)(sp);
1719 (cp->scr)(sp);
1720 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1721 break;
1722 default:
1723 printf(SPP_FMT "%s illegal %s in state %s\n",
1724 SPP_ARGS(ifp), cp->name,
1725 sppp_cp_type_name(h->type),
1726 sppp_state_name(sp->state[cp->protoidx]));
1727 ++ifp->if_ierrors;
1728 }
1729 break;
1730 case CODE_REJ:
1731 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1732 log(LOG_INFO,
1733 SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
1734 "danger will robinson\n",
1735 SPP_ARGS(ifp), cp->name,
1736 sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
1737 switch (sp->state[cp->protoidx]) {
1738 case STATE_CLOSED:
1739 case STATE_STOPPED:
1740 case STATE_REQ_SENT:
1741 case STATE_ACK_SENT:
1742 case STATE_CLOSING:
1743 case STATE_STOPPING:
1744 case STATE_OPENED:
1745 break;
1746 case STATE_ACK_RCVD:
1747 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1748 break;
1749 default:
1750 printf(SPP_FMT "%s illegal %s in state %s\n",
1751 SPP_ARGS(ifp), cp->name,
1752 sppp_cp_type_name(h->type),
1753 sppp_state_name(sp->state[cp->protoidx]));
1754 ++ifp->if_ierrors;
1755 }
1756 break;
1757 case PROTO_REJ:
1758 {
1759 int catastrophic;
1760 const struct cp *upper;
1761 int i;
1762 u_int16_t proto;
1763
1764 catastrophic = 0;
1765 upper = NULL;
1766 proto = ntohs(*((u_int16_t *)p));
1767 for (i = 0; i < IDX_COUNT; i++) {
1768 if (cps[i]->proto == proto) {
1769 upper = cps[i];
1770 break;
1771 }
1772 }
1773 if (upper == NULL)
1774 catastrophic++;
1775
1776 if (catastrophic || debug)
1777 log(catastrophic? LOG_INFO: LOG_DEBUG,
1778 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n",
1779 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+',
1780 sppp_cp_type_name(h->type), proto,
1781 upper ? upper->name : "unknown",
1782 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?");
1783
1784 /*
1785 * if we got RXJ+ against conf-req, the peer does not implement
1786 * this particular protocol type. terminate the protocol.
1787 */
1788 if (upper && !catastrophic) {
1789 if (sp->state[upper->protoidx] == STATE_REQ_SENT) {
1790 upper->Close(sp);
1791 break;
1792 }
1793 }
1794
1795 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1796 switch (sp->state[cp->protoidx]) {
1797 case STATE_CLOSED:
1798 case STATE_STOPPED:
1799 case STATE_REQ_SENT:
1800 case STATE_ACK_SENT:
1801 case STATE_CLOSING:
1802 case STATE_STOPPING:
1803 case STATE_OPENED:
1804 break;
1805 case STATE_ACK_RCVD:
1806 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1807 break;
1808 default:
1809 printf(SPP_FMT "%s illegal %s in state %s\n",
1810 SPP_ARGS(ifp), cp->name,
1811 sppp_cp_type_name(h->type),
1812 sppp_state_name(sp->state[cp->protoidx]));
1813 ++ifp->if_ierrors;
1814 }
1815 break;
1816 }
1817 case DISC_REQ:
1818 if (cp->proto != PPP_LCP)
1819 goto illegal;
1820 /* Discard the packet. */
1821 break;
1822 case ECHO_REQ:
1823 if (cp->proto != PPP_LCP)
1824 goto illegal;
1825 if (sp->state[cp->protoidx] != STATE_OPENED) {
1826 if (debug)
1827 log(-1, SPP_FMT "lcp echo req but lcp closed\n",
1828 SPP_ARGS(ifp));
1829 ++ifp->if_ierrors;
1830 break;
1831 }
1832 if (len < 8) {
1833 if (debug)
1834 log(-1, SPP_FMT "invalid lcp echo request "
1835 "packet length: %d bytes\n",
1836 SPP_ARGS(ifp), len);
1837 break;
1838 }
1839 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
1840 ntohl (*(long*)(h+1)) == sp->lcp.magic) {
1841 /* Line loopback mode detected. */
1842 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
1843 sp->pp_loopcnt = MAXALIVECNT * 5;
1844 if_down (ifp);
1845 sppp_qflush (&sp->pp_cpq);
1846
1847 /* Shut down the PPP link. */
1848 /* XXX */
1849 lcp.Down(sp);
1850 lcp.Up(sp);
1851 break;
1852 }
1853 *(long*)(h+1) = htonl (sp->lcp.magic);
1854 if (debug)
1855 log(-1, SPP_FMT "got lcp echo req, sending echo rep\n",
1856 SPP_ARGS(ifp));
1857 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
1858 break;
1859 case ECHO_REPLY:
1860 if (cp->proto != PPP_LCP)
1861 goto illegal;
1862 if (h->ident != sp->lcp.echoid) {
1863 ++ifp->if_ierrors;
1864 break;
1865 }
1866 if (len < 8) {
1867 if (debug)
1868 log(-1, SPP_FMT "lcp invalid echo reply "
1869 "packet length: %d bytes\n",
1870 SPP_ARGS(ifp), len);
1871 break;
1872 }
1873 if (debug)
1874 log(-1, SPP_FMT "lcp got echo rep\n",
1875 SPP_ARGS(ifp));
1876 if (!(sp->lcp.opts & (1 << LCP_OPT_MAGIC)) ||
1877 ntohl (*(long*)(h+1)) != sp->lcp.magic)
1878 sp->pp_alivecnt = 0;
1879 break;
1880 default:
1881 /* Unknown packet type -- send Code-Reject packet. */
1882 illegal:
1883 if (debug)
1884 log(-1, SPP_FMT "%s send code-rej for 0x%x\n",
1885 SPP_ARGS(ifp), cp->name, h->type);
1886 sppp_cp_send(sp, cp->proto, CODE_REJ,
1887 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h);
1888 ++ifp->if_ierrors;
1889 }
1890}
1891
1892
1893/*
1894 * The generic part of all Up/Down/Open/Close/TO event handlers.
1895 * Basically, the state transition handling in the automaton.
1896 */
1897static void
1898sppp_up_event(const struct cp *cp, struct sppp *sp)
1899{
1900 STDDCL;
1901
1902 if (debug)
1903 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
1904 SPP_ARGS(ifp), cp->name,
1905 sppp_state_name(sp->state[cp->protoidx]));
1906
1907 switch (sp->state[cp->protoidx]) {
1908 case STATE_INITIAL:
1909 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1910 break;
1911 case STATE_STARTING:
1912 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1913 (cp->scr)(sp);
1914 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1915 break;
1916 default:
1917 printf(SPP_FMT "%s illegal up in state %s\n",
1918 SPP_ARGS(ifp), cp->name,
1919 sppp_state_name(sp->state[cp->protoidx]));
1920 }
1921}
1922
1923static void
1924sppp_down_event(const struct cp *cp, struct sppp *sp)
1925{
1926 STDDCL;
1927
1928 if (debug)
1929 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
1930 SPP_ARGS(ifp), cp->name,
1931 sppp_state_name(sp->state[cp->protoidx]));
1932
1933 switch (sp->state[cp->protoidx]) {
1934 case STATE_CLOSED:
1935 case STATE_CLOSING:
1936 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1937 break;
1938 case STATE_STOPPED:
1939 sppp_cp_change_state(cp, sp, STATE_STARTING);
1940 (cp->tls)(sp);
1941 break;
1942 case STATE_STOPPING:
1943 case STATE_REQ_SENT:
1944 case STATE_ACK_RCVD:
1945 case STATE_ACK_SENT:
1946 sppp_cp_change_state(cp, sp, STATE_STARTING);
1947 break;
1948 case STATE_OPENED:
1949 (cp->tld)(sp);
1950 sppp_cp_change_state(cp, sp, STATE_STARTING);
1951 break;
1952 default:
1953 printf(SPP_FMT "%s illegal down in state %s\n",
1954 SPP_ARGS(ifp), cp->name,
1955 sppp_state_name(sp->state[cp->protoidx]));
1956 }
1957}
1958
1959
1960static void
1961sppp_open_event(const struct cp *cp, struct sppp *sp)
1962{
1963 STDDCL;
1964
1965 if (debug)
1966 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
1967 SPP_ARGS(ifp), cp->name,
1968 sppp_state_name(sp->state[cp->protoidx]));
1969
1970 switch (sp->state[cp->protoidx]) {
1971 case STATE_INITIAL:
1972 sppp_cp_change_state(cp, sp, STATE_STARTING);
1973 (cp->tls)(sp);
1974 break;
1975 case STATE_STARTING:
1976 break;
1977 case STATE_CLOSED:
1978 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1979 (cp->scr)(sp);
1980 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1981 break;
1982 case STATE_STOPPED:
1983 /*
1984 * Try escaping stopped state. This seems to bite
1985 * people occasionally, in particular for IPCP,
1986 * presumably following previous IPCP negotiation
1987 * aborts. Somehow, we must have missed a Down event
1988 * which would have caused a transition into starting
1989 * state, so as a bandaid we force the Down event now.
1990 * This effectively implements (something like the)
1991 * `restart' option mentioned in the state transition
1992 * table of RFC 1661.
1993 */
1994 sppp_cp_change_state(cp, sp, STATE_STARTING);
1995 (cp->tls)(sp);
1996 break;
1997 case STATE_STOPPING:
1998 case STATE_REQ_SENT:
1999 case STATE_ACK_RCVD:
2000 case STATE_ACK_SENT:
2001 case STATE_OPENED:
2002 break;
2003 case STATE_CLOSING:
2004 sppp_cp_change_state(cp, sp, STATE_STOPPING);
2005 break;
2006 }
2007}
2008
2009
2010static void
2011sppp_close_event(const struct cp *cp, struct sppp *sp)
2012{
2013 STDDCL;
2014
2015 if (debug)
2016 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
2017 SPP_ARGS(ifp), cp->name,
2018 sppp_state_name(sp->state[cp->protoidx]));
2019
2020 switch (sp->state[cp->protoidx]) {
2021 case STATE_INITIAL:
2022 case STATE_CLOSED:
2023 case STATE_CLOSING:
2024 break;
2025 case STATE_STARTING:
2026 sppp_cp_change_state(cp, sp, STATE_INITIAL);
2027 (cp->tlf)(sp);
2028 break;
2029 case STATE_STOPPED:
2030 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2031 break;
2032 case STATE_STOPPING:
2033 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2034 break;
2035 case STATE_OPENED:
2036 (cp->tld)(sp);
2037 /* FALLTHROUGH */
2038 case STATE_REQ_SENT:
2039 case STATE_ACK_RCVD:
2040 case STATE_ACK_SENT:
2041 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
2042 sppp_cp_send(sp, cp->proto, TERM_REQ,
2043 ++sp->pp_seq[cp->protoidx], 0, 0);
2044 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2045 break;
2046 }
2047}
2048
2049static void
2050sppp_to_event(const struct cp *cp, struct sppp *sp)
2051{
2052 STDDCL;
|
2073 int s;
| |
2074
| 2053
|
2075 s = splimp();
| |
2076 SPPP_LOCK(sp);
2077 if (debug)
2078 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
2079 SPP_ARGS(ifp), cp->name,
2080 sppp_state_name(sp->state[cp->protoidx]),
2081 sp->rst_counter[cp->protoidx]);
2082
2083 if (--sp->rst_counter[cp->protoidx] < 0)
2084 /* TO- event */
2085 switch (sp->state[cp->protoidx]) {
2086 case STATE_CLOSING:
2087 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2088 (cp->tlf)(sp);
2089 break;
2090 case STATE_STOPPING:
2091 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2092 (cp->tlf)(sp);
2093 break;
2094 case STATE_REQ_SENT:
2095 case STATE_ACK_RCVD:
2096 case STATE_ACK_SENT:
2097 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2098 (cp->tlf)(sp);
2099 break;
2100 }
2101 else
2102 /* TO+ event */
2103 switch (sp->state[cp->protoidx]) {
2104 case STATE_CLOSING:
2105 case STATE_STOPPING:
2106 sppp_cp_send(sp, cp->proto, TERM_REQ,
2107 ++sp->pp_seq[cp->protoidx], 0, 0);
2108 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2109 cp->TO, (void *)sp);
2110 break;
2111 case STATE_REQ_SENT:
2112 case STATE_ACK_RCVD:
2113 (cp->scr)(sp);
2114 /* sppp_cp_change_state() will restart the timer */
2115 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
2116 break;
2117 case STATE_ACK_SENT:
2118 (cp->scr)(sp);
2119 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2120 cp->TO, (void *)sp);
2121 break;
2122 }
2123
2124 SPPP_UNLOCK(sp);
| 2054 SPPP_LOCK(sp);
2055 if (debug)
2056 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
2057 SPP_ARGS(ifp), cp->name,
2058 sppp_state_name(sp->state[cp->protoidx]),
2059 sp->rst_counter[cp->protoidx]);
2060
2061 if (--sp->rst_counter[cp->protoidx] < 0)
2062 /* TO- event */
2063 switch (sp->state[cp->protoidx]) {
2064 case STATE_CLOSING:
2065 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2066 (cp->tlf)(sp);
2067 break;
2068 case STATE_STOPPING:
2069 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2070 (cp->tlf)(sp);
2071 break;
2072 case STATE_REQ_SENT:
2073 case STATE_ACK_RCVD:
2074 case STATE_ACK_SENT:
2075 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2076 (cp->tlf)(sp);
2077 break;
2078 }
2079 else
2080 /* TO+ event */
2081 switch (sp->state[cp->protoidx]) {
2082 case STATE_CLOSING:
2083 case STATE_STOPPING:
2084 sppp_cp_send(sp, cp->proto, TERM_REQ,
2085 ++sp->pp_seq[cp->protoidx], 0, 0);
2086 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2087 cp->TO, (void *)sp);
2088 break;
2089 case STATE_REQ_SENT:
2090 case STATE_ACK_RCVD:
2091 (cp->scr)(sp);
2092 /* sppp_cp_change_state() will restart the timer */
2093 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
2094 break;
2095 case STATE_ACK_SENT:
2096 (cp->scr)(sp);
2097 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2098 cp->TO, (void *)sp);
2099 break;
2100 }
2101
2102 SPPP_UNLOCK(sp);
|
2125 splx(s);
| |
2126}
2127
2128/*
2129 * Change the state of a control protocol in the state automaton.
2130 * Takes care of starting/stopping the restart timer.
2131 */
2132static void
2133sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
2134{
2135 sp->state[cp->protoidx] = newstate;
2136
2137 callout_stop (&sp->ch[cp->protoidx]);
2138
2139 switch (newstate) {
2140 case STATE_INITIAL:
2141 case STATE_STARTING:
2142 case STATE_CLOSED:
2143 case STATE_STOPPED:
2144 case STATE_OPENED:
2145 break;
2146 case STATE_CLOSING:
2147 case STATE_STOPPING:
2148 case STATE_REQ_SENT:
2149 case STATE_ACK_RCVD:
2150 case STATE_ACK_SENT:
2151 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2152 cp->TO, (void *)sp);
2153 break;
2154 }
2155}
2156
2157/*
2158 *--------------------------------------------------------------------------*
2159 * *
2160 * The LCP implementation. *
2161 * *
2162 *--------------------------------------------------------------------------*
2163 */
2164static void
2165sppp_pp_up(struct sppp *sp)
2166{
2167 SPPP_LOCK(sp);
2168 lcp.Up(sp);
2169 SPPP_UNLOCK(sp);
2170}
2171
2172static void
2173sppp_pp_down(struct sppp *sp)
2174{
2175 SPPP_LOCK(sp);
2176 lcp.Down(sp);
2177 SPPP_UNLOCK(sp);
2178}
2179
2180static void
2181sppp_lcp_init(struct sppp *sp)
2182{
2183 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2184 sp->lcp.magic = 0;
2185 sp->state[IDX_LCP] = STATE_INITIAL;
2186 sp->fail_counter[IDX_LCP] = 0;
2187 sp->pp_seq[IDX_LCP] = 0;
2188 sp->pp_rseq[IDX_LCP] = 0;
2189 sp->lcp.protos = 0;
2190 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2191
2192 /* Note that these values are relevant for all control protocols */
2193 sp->lcp.timeout = 3 * hz;
2194 sp->lcp.max_terminate = 2;
2195 sp->lcp.max_configure = 10;
2196 sp->lcp.max_failure = 10;
2197 callout_init(&sp->ch[IDX_LCP], CALLOUT_MPSAFE);
2198}
2199
2200static void
2201sppp_lcp_up(struct sppp *sp)
2202{
2203 STDDCL;
2204
2205 sp->pp_alivecnt = 0;
2206 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2207 sp->lcp.magic = 0;
2208 sp->lcp.protos = 0;
2209 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2210 /*
2211 * If we are authenticator, negotiate LCP_AUTH
2212 */
2213 if (sp->hisauth.proto != 0)
2214 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
2215 else
2216 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2217 sp->pp_flags &= ~PP_NEEDAUTH;
2218 /*
2219 * If this interface is passive or dial-on-demand, and we are
2220 * still in Initial state, it means we've got an incoming
2221 * call. Activate the interface.
2222 */
2223 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
2224 if (debug)
2225 log(LOG_DEBUG,
2226 SPP_FMT "Up event", SPP_ARGS(ifp));
2227 ifp->if_drv_flags |= IFF_DRV_RUNNING;
2228 if (sp->state[IDX_LCP] == STATE_INITIAL) {
2229 if (debug)
2230 log(-1, "(incoming call)\n");
2231 sp->pp_flags |= PP_CALLIN;
2232 lcp.Open(sp);
2233 } else if (debug)
2234 log(-1, "\n");
2235 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 &&
2236 (sp->state[IDX_LCP] == STATE_INITIAL)) {
2237 ifp->if_drv_flags |= IFF_DRV_RUNNING;
2238 lcp.Open(sp);
2239 }
2240
2241 sppp_up_event(&lcp, sp);
2242}
2243
2244static void
2245sppp_lcp_down(struct sppp *sp)
2246{
2247 STDDCL;
2248
2249 sppp_down_event(&lcp, sp);
2250
2251 /*
2252 * If this is neither a dial-on-demand nor a passive
2253 * interface, simulate an ``ifconfig down'' action, so the
2254 * administrator can force a redial by another ``ifconfig
2255 * up''. XXX For leased line operation, should we immediately
2256 * try to reopen the connection here?
2257 */
2258 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
2259 log(LOG_INFO,
2260 SPP_FMT "Down event, taking interface down.\n",
2261 SPP_ARGS(ifp));
2262 if_down(ifp);
2263 } else {
2264 if (debug)
2265 log(LOG_DEBUG,
2266 SPP_FMT "Down event (carrier loss)\n",
2267 SPP_ARGS(ifp));
2268 sp->pp_flags &= ~PP_CALLIN;
2269 if (sp->state[IDX_LCP] != STATE_INITIAL)
2270 lcp.Close(sp);
2271 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
2272 }
2273}
2274
2275static void
2276sppp_lcp_open(struct sppp *sp)
2277{
2278 sppp_open_event(&lcp, sp);
2279}
2280
2281static void
2282sppp_lcp_close(struct sppp *sp)
2283{
2284 sppp_close_event(&lcp, sp);
2285}
2286
2287static void
2288sppp_lcp_TO(void *cookie)
2289{
2290 sppp_to_event(&lcp, (struct sppp *)cookie);
2291}
2292
2293/*
2294 * Analyze a configure request. Return true if it was agreeable, and
2295 * caused action sca, false if it has been rejected or nak'ed, and
2296 * caused action scn. (The return value is used to make the state
2297 * transition decision in the state automaton.)
2298 */
2299static int
2300sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2301{
2302 STDDCL;
2303 u_char *buf, *r, *p;
2304 int origlen, rlen;
2305 u_long nmagic;
2306 u_short authproto;
2307
2308 len -= 4;
2309 origlen = len;
2310 buf = r = malloc (len, M_TEMP, M_NOWAIT);
2311 if (! buf)
2312 return (0);
2313
2314 if (debug)
2315 log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
2316 SPP_ARGS(ifp));
2317
2318 /* pass 1: check for things that need to be rejected */
2319 p = (void*) (h+1);
2320 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2321 len-=p[1], p+=p[1]) {
2322 if (debug)
2323 log(-1, " %s ", sppp_lcp_opt_name(*p));
2324 switch (*p) {
2325 case LCP_OPT_MAGIC:
2326 /* Magic number. */
2327 if (len >= 6 && p[1] == 6)
2328 continue;
2329 if (debug)
2330 log(-1, "[invalid] ");
2331 break;
2332 case LCP_OPT_ASYNC_MAP:
2333 /* Async control character map. */
2334 if (len >= 6 && p[1] == 6)
2335 continue;
2336 if (debug)
2337 log(-1, "[invalid] ");
2338 break;
2339 case LCP_OPT_MRU:
2340 /* Maximum receive unit. */
2341 if (len >= 4 && p[1] == 4)
2342 continue;
2343 if (debug)
2344 log(-1, "[invalid] ");
2345 break;
2346 case LCP_OPT_AUTH_PROTO:
2347 if (len < 4) {
2348 if (debug)
2349 log(-1, "[invalid] ");
2350 break;
2351 }
2352 authproto = (p[2] << 8) + p[3];
2353 if (authproto == PPP_CHAP && p[1] != 5) {
2354 if (debug)
2355 log(-1, "[invalid chap len] ");
2356 break;
2357 }
2358 if (sp->myauth.proto == 0) {
2359 /* we are not configured to do auth */
2360 if (debug)
2361 log(-1, "[not configured] ");
2362 break;
2363 }
2364 /*
2365 * Remote want us to authenticate, remember this,
2366 * so we stay in PHASE_AUTHENTICATE after LCP got
2367 * up.
2368 */
2369 sp->pp_flags |= PP_NEEDAUTH;
2370 continue;
2371 default:
2372 /* Others not supported. */
2373 if (debug)
2374 log(-1, "[rej] ");
2375 break;
2376 }
2377 /* Add the option to rejected list. */
2378 bcopy (p, r, p[1]);
2379 r += p[1];
2380 rlen += p[1];
2381 }
2382 if (rlen) {
2383 if (debug)
2384 log(-1, " send conf-rej\n");
2385 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2386 return 0;
2387 } else if (debug)
2388 log(-1, "\n");
2389
2390 /*
2391 * pass 2: check for option values that are unacceptable and
2392 * thus require to be nak'ed.
2393 */
2394 if (debug)
2395 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
2396 SPP_ARGS(ifp));
2397
2398 p = (void*) (h+1);
2399 len = origlen;
2400 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2401 len-=p[1], p+=p[1]) {
2402 if (debug)
2403 log(-1, " %s ", sppp_lcp_opt_name(*p));
2404 switch (*p) {
2405 case LCP_OPT_MAGIC:
2406 /* Magic number -- extract. */
2407 nmagic = (u_long)p[2] << 24 |
2408 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2409 if (nmagic != sp->lcp.magic) {
2410 sp->pp_loopcnt = 0;
2411 if (debug)
2412 log(-1, "0x%lx ", nmagic);
2413 continue;
2414 }
2415 if (debug && sp->pp_loopcnt < MAXALIVECNT*5)
2416 log(-1, "[glitch] ");
2417 ++sp->pp_loopcnt;
2418 /*
2419 * We negate our magic here, and NAK it. If
2420 * we see it later in an NAK packet, we
2421 * suggest a new one.
2422 */
2423 nmagic = ~sp->lcp.magic;
2424 /* Gonna NAK it. */
2425 p[2] = nmagic >> 24;
2426 p[3] = nmagic >> 16;
2427 p[4] = nmagic >> 8;
2428 p[5] = nmagic;
2429 break;
2430
2431 case LCP_OPT_ASYNC_MAP:
2432 /*
2433 * Async control character map -- just ignore it.
2434 *
2435 * Quote from RFC 1662, chapter 6:
2436 * To enable this functionality, synchronous PPP
2437 * implementations MUST always respond to the
2438 * Async-Control-Character-Map Configuration
2439 * Option with the LCP Configure-Ack. However,
2440 * acceptance of the Configuration Option does
2441 * not imply that the synchronous implementation
2442 * will do any ACCM mapping. Instead, all such
2443 * octet mapping will be performed by the
2444 * asynchronous-to-synchronous converter.
2445 */
2446 continue;
2447
2448 case LCP_OPT_MRU:
2449 /*
2450 * Maximum receive unit. Always agreeable,
2451 * but ignored by now.
2452 */
2453 sp->lcp.their_mru = p[2] * 256 + p[3];
2454 if (debug)
2455 log(-1, "%lu ", sp->lcp.their_mru);
2456 continue;
2457
2458 case LCP_OPT_AUTH_PROTO:
2459 authproto = (p[2] << 8) + p[3];
2460 if (sp->myauth.proto != authproto) {
2461 /* not agreed, nak */
2462 if (debug)
2463 log(-1, "[mine %s != his %s] ",
2464 sppp_proto_name(sp->hisauth.proto),
2465 sppp_proto_name(authproto));
2466 p[2] = sp->myauth.proto >> 8;
2467 p[3] = sp->myauth.proto;
2468 break;
2469 }
2470 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
2471 if (debug)
2472 log(-1, "[chap not MD5] ");
2473 p[4] = CHAP_MD5;
2474 break;
2475 }
2476 continue;
2477 }
2478 /* Add the option to nak'ed list. */
2479 bcopy (p, r, p[1]);
2480 r += p[1];
2481 rlen += p[1];
2482 }
2483 if (rlen) {
2484 /*
2485 * Local and remote magics equal -- loopback?
2486 */
2487 if (sp->pp_loopcnt >= MAXALIVECNT*5) {
2488 if (sp->pp_loopcnt == MAXALIVECNT*5)
2489 printf (SPP_FMT "loopback\n",
2490 SPP_ARGS(ifp));
2491 if (ifp->if_flags & IFF_UP) {
2492 if_down(ifp);
2493 sppp_qflush(&sp->pp_cpq);
2494 /* XXX ? */
2495 lcp.Down(sp);
2496 lcp.Up(sp);
2497 }
2498 } else if (!sp->pp_loopcnt &&
2499 ++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
2500 if (debug)
2501 log(-1, " max_failure (%d) exceeded, "
2502 "send conf-rej\n",
2503 sp->lcp.max_failure);
2504 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2505 } else {
2506 if (debug)
2507 log(-1, " send conf-nak\n");
2508 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
2509 }
2510 } else {
2511 if (debug)
2512 log(-1, " send conf-ack\n");
2513 sp->fail_counter[IDX_LCP] = 0;
2514 sp->pp_loopcnt = 0;
2515 sppp_cp_send (sp, PPP_LCP, CONF_ACK,
2516 h->ident, origlen, h+1);
2517 }
2518
2519 free (buf, M_TEMP);
2520 return (rlen == 0);
2521}
2522
2523/*
2524 * Analyze the LCP Configure-Reject option list, and adjust our
2525 * negotiation.
2526 */
2527static void
2528sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
2529{
2530 STDDCL;
2531 u_char *buf, *p;
2532
2533 len -= 4;
2534 buf = malloc (len, M_TEMP, M_NOWAIT);
2535 if (!buf)
2536 return;
2537
2538 if (debug)
2539 log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
2540 SPP_ARGS(ifp));
2541
2542 p = (void*) (h+1);
2543 for (; len >= 2 && p[1] >= 2 && len >= p[1];
2544 len -= p[1], p += p[1]) {
2545 if (debug)
2546 log(-1, " %s ", sppp_lcp_opt_name(*p));
2547 switch (*p) {
2548 case LCP_OPT_MAGIC:
2549 /* Magic number -- can't use it, use 0 */
2550 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
2551 sp->lcp.magic = 0;
2552 break;
2553 case LCP_OPT_MRU:
2554 /*
2555 * Should not be rejected anyway, since we only
2556 * negotiate a MRU if explicitly requested by
2557 * peer.
2558 */
2559 sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
2560 break;
2561 case LCP_OPT_AUTH_PROTO:
2562 /*
2563 * Peer doesn't want to authenticate himself,
2564 * deny unless this is a dialout call, and
2565 * AUTHFLAG_NOCALLOUT is set.
2566 */
2567 if ((sp->pp_flags & PP_CALLIN) == 0 &&
2568 (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
2569 if (debug)
2570 log(-1, "[don't insist on auth "
2571 "for callout]");
2572 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2573 break;
2574 }
2575 if (debug)
2576 log(-1, "[access denied]\n");
2577 lcp.Close(sp);
2578 break;
2579 }
2580 }
2581 if (debug)
2582 log(-1, "\n");
2583 free (buf, M_TEMP);
2584 return;
2585}
2586
2587/*
2588 * Analyze the LCP Configure-NAK option list, and adjust our
2589 * negotiation.
2590 */
2591static void
2592sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
2593{
2594 STDDCL;
2595 u_char *buf, *p;
2596 u_long magic;
2597
2598 len -= 4;
2599 buf = malloc (len, M_TEMP, M_NOWAIT);
2600 if (!buf)
2601 return;
2602
2603 if (debug)
2604 log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
2605 SPP_ARGS(ifp));
2606
2607 p = (void*) (h+1);
2608 for (; len >= 2 && p[1] >= 2 && len >= p[1];
2609 len -= p[1], p += p[1]) {
2610 if (debug)
2611 log(-1, " %s ", sppp_lcp_opt_name(*p));
2612 switch (*p) {
2613 case LCP_OPT_MAGIC:
2614 /* Magic number -- renegotiate */
2615 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
2616 len >= 6 && p[1] == 6) {
2617 magic = (u_long)p[2] << 24 |
2618 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2619 /*
2620 * If the remote magic is our negated one,
2621 * this looks like a loopback problem.
2622 * Suggest a new magic to make sure.
2623 */
2624 if (magic == ~sp->lcp.magic) {
2625 if (debug)
2626 log(-1, "magic glitch ");
2627 sp->lcp.magic = random();
2628 } else {
2629 sp->lcp.magic = magic;
2630 if (debug)
2631 log(-1, "%lu ", magic);
2632 }
2633 }
2634 break;
2635 case LCP_OPT_MRU:
2636 /*
2637 * Peer wants to advise us to negotiate an MRU.
2638 * Agree on it if it's reasonable, or use
2639 * default otherwise.
2640 */
2641 if (len >= 4 && p[1] == 4) {
2642 u_int mru = p[2] * 256 + p[3];
2643 if (debug)
2644 log(-1, "%d ", mru);
2645 if (mru < PP_MTU || mru > PP_MAX_MRU)
2646 mru = PP_MTU;
2647 sp->lcp.mru = mru;
2648 sp->lcp.opts |= (1 << LCP_OPT_MRU);
2649 }
2650 break;
2651 case LCP_OPT_AUTH_PROTO:
2652 /*
2653 * Peer doesn't like our authentication method,
2654 * deny.
2655 */
2656 if (debug)
2657 log(-1, "[access denied]\n");
2658 lcp.Close(sp);
2659 break;
2660 }
2661 }
2662 if (debug)
2663 log(-1, "\n");
2664 free (buf, M_TEMP);
2665 return;
2666}
2667
2668static void
2669sppp_lcp_tlu(struct sppp *sp)
2670{
2671 STDDCL;
2672 int i;
2673 u_long mask;
2674
2675 /* XXX ? */
2676 if (! (ifp->if_flags & IFF_UP) &&
2677 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2678 /* Coming out of loopback mode. */
2679 if_up(ifp);
2680 printf (SPP_FMT "up\n", SPP_ARGS(ifp));
2681 }
2682
2683 for (i = 0; i < IDX_COUNT; i++)
2684 if ((cps[i])->flags & CP_QUAL)
2685 (cps[i])->Open(sp);
2686
2687 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
2688 (sp->pp_flags & PP_NEEDAUTH) != 0)
2689 sp->pp_phase = PHASE_AUTHENTICATE;
2690 else
2691 sp->pp_phase = PHASE_NETWORK;
2692
2693 if (debug)
2694 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2695 sppp_phase_name(sp->pp_phase));
2696
2697 /*
2698 * Open all authentication protocols. This is even required
2699 * if we already proceeded to network phase, since it might be
2700 * that remote wants us to authenticate, so we might have to
2701 * send a PAP request. Undesired authentication protocols
2702 * don't do anything when they get an Open event.
2703 */
2704 for (i = 0; i < IDX_COUNT; i++)
2705 if ((cps[i])->flags & CP_AUTH)
2706 (cps[i])->Open(sp);
2707
2708 if (sp->pp_phase == PHASE_NETWORK) {
2709 /* Notify all NCPs. */
2710 for (i = 0; i < IDX_COUNT; i++)
2711 if (((cps[i])->flags & CP_NCP) &&
2712 /*
2713 * XXX
2714 * Hack to administratively disable IPv6 if
2715 * not desired. Perhaps we should have another
2716 * flag for this, but right now, we can make
2717 * all struct cp's read/only.
2718 */
2719 (cps[i] != &ipv6cp ||
2720 (sp->confflags & CONF_ENABLE_IPV6)))
2721 (cps[i])->Open(sp);
2722 }
2723
2724 /* Send Up events to all started protos. */
2725 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2726 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0)
2727 (cps[i])->Up(sp);
2728
2729 /* notify low-level driver of state change */
2730 if (sp->pp_chg)
2731 sp->pp_chg(sp, (int)sp->pp_phase);
2732
2733 if (sp->pp_phase == PHASE_NETWORK)
2734 /* if no NCP is starting, close down */
2735 sppp_lcp_check_and_close(sp);
2736}
2737
2738static void
2739sppp_lcp_tld(struct sppp *sp)
2740{
2741 STDDCL;
2742 int i;
2743 u_long mask;
2744
2745 sp->pp_phase = PHASE_TERMINATE;
2746
2747 if (debug)
2748 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2749 sppp_phase_name(sp->pp_phase));
2750
2751 /*
2752 * Take upper layers down. We send the Down event first and
2753 * the Close second to prevent the upper layers from sending
2754 * ``a flurry of terminate-request packets'', as the RFC
2755 * describes it.
2756 */
2757 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2758 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) {
2759 (cps[i])->Down(sp);
2760 (cps[i])->Close(sp);
2761 }
2762}
2763
2764static void
2765sppp_lcp_tls(struct sppp *sp)
2766{
2767 STDDCL;
2768
2769 sp->pp_phase = PHASE_ESTABLISH;
2770
2771 if (debug)
2772 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2773 sppp_phase_name(sp->pp_phase));
2774
2775 /* Notify lower layer if desired. */
2776 if (sp->pp_tls)
2777 (sp->pp_tls)(sp);
2778 else
2779 (sp->pp_up)(sp);
2780}
2781
2782static void
2783sppp_lcp_tlf(struct sppp *sp)
2784{
2785 STDDCL;
2786
2787 sp->pp_phase = PHASE_DEAD;
2788 if (debug)
2789 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2790 sppp_phase_name(sp->pp_phase));
2791
2792 /* Notify lower layer if desired. */
2793 if (sp->pp_tlf)
2794 (sp->pp_tlf)(sp);
2795 else
2796 (sp->pp_down)(sp);
2797}
2798
2799static void
2800sppp_lcp_scr(struct sppp *sp)
2801{
2802 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
2803 int i = 0;
2804 u_short authproto;
2805
2806 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
2807 if (! sp->lcp.magic)
2808 sp->lcp.magic = random();
2809 opt[i++] = LCP_OPT_MAGIC;
2810 opt[i++] = 6;
2811 opt[i++] = sp->lcp.magic >> 24;
2812 opt[i++] = sp->lcp.magic >> 16;
2813 opt[i++] = sp->lcp.magic >> 8;
2814 opt[i++] = sp->lcp.magic;
2815 }
2816
2817 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
2818 opt[i++] = LCP_OPT_MRU;
2819 opt[i++] = 4;
2820 opt[i++] = sp->lcp.mru >> 8;
2821 opt[i++] = sp->lcp.mru;
2822 }
2823
2824 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
2825 authproto = sp->hisauth.proto;
2826 opt[i++] = LCP_OPT_AUTH_PROTO;
2827 opt[i++] = authproto == PPP_CHAP? 5: 4;
2828 opt[i++] = authproto >> 8;
2829 opt[i++] = authproto;
2830 if (authproto == PPP_CHAP)
2831 opt[i++] = CHAP_MD5;
2832 }
2833
2834 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP];
2835 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
2836}
2837
2838/*
2839 * Check the open NCPs, return true if at least one NCP is open.
2840 */
2841static int
2842sppp_ncp_check(struct sppp *sp)
2843{
2844 int i, mask;
2845
2846 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2847 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP)
2848 return 1;
2849 return 0;
2850}
2851
2852/*
2853 * Re-check the open NCPs and see if we should terminate the link.
2854 * Called by the NCPs during their tlf action handling.
2855 */
2856static void
2857sppp_lcp_check_and_close(struct sppp *sp)
2858{
2859
2860 if (sp->pp_phase < PHASE_NETWORK)
2861 /* don't bother, we are already going down */
2862 return;
2863
2864 if (sppp_ncp_check(sp))
2865 return;
2866
2867 lcp.Close(sp);
2868}
2869
2870/*
2871 *--------------------------------------------------------------------------*
2872 * *
2873 * The IPCP implementation. *
2874 * *
2875 *--------------------------------------------------------------------------*
2876 */
2877
2878#ifdef INET
2879static void
2880sppp_ipcp_init(struct sppp *sp)
2881{
2882 sp->ipcp.opts = 0;
2883 sp->ipcp.flags = 0;
2884 sp->state[IDX_IPCP] = STATE_INITIAL;
2885 sp->fail_counter[IDX_IPCP] = 0;
2886 sp->pp_seq[IDX_IPCP] = 0;
2887 sp->pp_rseq[IDX_IPCP] = 0;
2888 callout_init(&sp->ch[IDX_IPCP], CALLOUT_MPSAFE);
2889}
2890
2891static void
2892sppp_ipcp_up(struct sppp *sp)
2893{
2894 sppp_up_event(&ipcp, sp);
2895}
2896
2897static void
2898sppp_ipcp_down(struct sppp *sp)
2899{
2900 sppp_down_event(&ipcp, sp);
2901}
2902
2903static void
2904sppp_ipcp_open(struct sppp *sp)
2905{
2906 STDDCL;
2907 u_long myaddr, hisaddr;
2908
2909 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN | IPCP_MYADDR_SEEN |
2910 IPCP_MYADDR_DYN | IPCP_VJ);
2911 sp->ipcp.opts = 0;
2912
2913 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
2914 /*
2915 * If we don't have his address, this probably means our
2916 * interface doesn't want to talk IP at all. (This could
2917 * be the case if somebody wants to speak only IPX, for
2918 * example.) Don't open IPCP in this case.
2919 */
2920 if (hisaddr == 0L) {
2921 /* XXX this message should go away */
2922 if (debug)
2923 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
2924 SPP_ARGS(ifp));
2925 return;
2926 }
2927 if (myaddr == 0L) {
2928 /*
2929 * I don't have an assigned address, so i need to
2930 * negotiate my address.
2931 */
2932 sp->ipcp.flags |= IPCP_MYADDR_DYN;
2933 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
2934 } else
2935 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
2936 if (sp->confflags & CONF_ENABLE_VJ) {
2937 sp->ipcp.opts |= (1 << IPCP_OPT_COMPRESSION);
2938 sp->ipcp.max_state = MAX_STATES - 1;
2939 sp->ipcp.compress_cid = 1;
2940 }
2941 sppp_open_event(&ipcp, sp);
2942}
2943
2944static void
2945sppp_ipcp_close(struct sppp *sp)
2946{
2947 sppp_close_event(&ipcp, sp);
2948 if (sp->ipcp.flags & IPCP_MYADDR_DYN)
2949 /*
2950 * My address was dynamic, clear it again.
2951 */
2952 sppp_set_ip_addr(sp, 0L);
2953}
2954
2955static void
2956sppp_ipcp_TO(void *cookie)
2957{
2958 sppp_to_event(&ipcp, (struct sppp *)cookie);
2959}
2960
2961/*
2962 * Analyze a configure request. Return true if it was agreeable, and
2963 * caused action sca, false if it has been rejected or nak'ed, and
2964 * caused action scn. (The return value is used to make the state
2965 * transition decision in the state automaton.)
2966 */
2967static int
2968sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2969{
2970 u_char *buf, *r, *p;
2971 struct ifnet *ifp = SP2IFP(sp);
2972 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
2973 u_long hisaddr, desiredaddr;
2974 int gotmyaddr = 0;
2975 int desiredcomp;
2976
2977 len -= 4;
2978 origlen = len;
2979 /*
2980 * Make sure to allocate a buf that can at least hold a
2981 * conf-nak with an `address' option. We might need it below.
2982 */
2983 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
2984 if (! buf)
2985 return (0);
2986
2987 /* pass 1: see if we can recognize them */
2988 if (debug)
2989 log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
2990 SPP_ARGS(ifp));
2991 p = (void*) (h+1);
2992 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2993 len-=p[1], p+=p[1]) {
2994 if (debug)
2995 log(-1, " %s ", sppp_ipcp_opt_name(*p));
2996 switch (*p) {
2997 case IPCP_OPT_COMPRESSION:
2998 if (!(sp->confflags & CONF_ENABLE_VJ)) {
2999 /* VJ compression administratively disabled */
3000 if (debug)
3001 log(-1, "[locally disabled] ");
3002 break;
3003 }
3004 /*
3005 * In theory, we should only conf-rej an
3006 * option that is shorter than RFC 1618
3007 * requires (i.e. < 4), and should conf-nak
3008 * anything else that is not VJ. However,
3009 * since our algorithm always uses the
3010 * original option to NAK it with new values,
3011 * things would become more complicated. In
3012 * pratice, the only commonly implemented IP
3013 * compression option is VJ anyway, so the
3014 * difference is negligible.
3015 */
3016 if (len >= 6 && p[1] == 6) {
3017 /*
3018 * correctly formed compression option
3019 * that could be VJ compression
3020 */
3021 continue;
3022 }
3023 if (debug)
3024 log(-1,
3025 "optlen %d [invalid/unsupported] ",
3026 p[1]);
3027 break;
3028 case IPCP_OPT_ADDRESS:
3029 if (len >= 6 && p[1] == 6) {
3030 /* correctly formed address option */
3031 continue;
3032 }
3033 if (debug)
3034 log(-1, "[invalid] ");
3035 break;
3036 default:
3037 /* Others not supported. */
3038 if (debug)
3039 log(-1, "[rej] ");
3040 break;
3041 }
3042 /* Add the option to rejected list. */
3043 bcopy (p, r, p[1]);
3044 r += p[1];
3045 rlen += p[1];
3046 }
3047 if (rlen) {
3048 if (debug)
3049 log(-1, " send conf-rej\n");
3050 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
3051 return 0;
3052 } else if (debug)
3053 log(-1, "\n");
3054
3055 /* pass 2: parse option values */
3056 sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
3057 if (debug)
3058 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
3059 SPP_ARGS(ifp));
3060 p = (void*) (h+1);
3061 len = origlen;
3062 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3063 len-=p[1], p+=p[1]) {
3064 if (debug)
3065 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3066 switch (*p) {
3067 case IPCP_OPT_COMPRESSION:
3068 desiredcomp = p[2] << 8 | p[3];
3069 /* We only support VJ */
3070 if (desiredcomp == IPCP_COMP_VJ) {
3071 if (debug)
3072 log(-1, "VJ [ack] ");
3073 sp->ipcp.flags |= IPCP_VJ;
3074 sl_compress_init(sp->pp_comp, p[4]);
3075 sp->ipcp.max_state = p[4];
3076 sp->ipcp.compress_cid = p[5];
3077 continue;
3078 }
3079 if (debug)
3080 log(-1,
3081 "compproto %#04x [not supported] ",
3082 desiredcomp);
3083 p[2] = IPCP_COMP_VJ >> 8;
3084 p[3] = IPCP_COMP_VJ;
3085 p[4] = sp->ipcp.max_state;
3086 p[5] = sp->ipcp.compress_cid;
3087 break;
3088 case IPCP_OPT_ADDRESS:
3089 /* This is the address he wants in his end */
3090 desiredaddr = p[2] << 24 | p[3] << 16 |
3091 p[4] << 8 | p[5];
3092 if (desiredaddr == hisaddr ||
3093 (hisaddr >= 1 && hisaddr <= 254 && desiredaddr != 0)) {
3094 /*
3095 * Peer's address is same as our value,
3096 * or we have set it to 0.0.0.* to
3097 * indicate that we do not really care,
3098 * this is agreeable. Gonna conf-ack
3099 * it.
3100 */
3101 if (debug)
3102 log(-1, "%s [ack] ",
3103 sppp_dotted_quad(hisaddr));
3104 /* record that we've seen it already */
3105 sp->ipcp.flags |= IPCP_HISADDR_SEEN;
3106 continue;
3107 }
3108 /*
3109 * The address wasn't agreeable. This is either
3110 * he sent us 0.0.0.0, asking to assign him an
3111 * address, or he send us another address not
3112 * matching our value. Either case, we gonna
3113 * conf-nak it with our value.
3114 * XXX: we should "rej" if hisaddr == 0
3115 */
3116 if (debug) {
3117 if (desiredaddr == 0)
3118 log(-1, "[addr requested] ");
3119 else
3120 log(-1, "%s [not agreed] ",
3121 sppp_dotted_quad(desiredaddr));
3122
3123 }
3124 p[2] = hisaddr >> 24;
3125 p[3] = hisaddr >> 16;
3126 p[4] = hisaddr >> 8;
3127 p[5] = hisaddr;
3128 break;
3129 }
3130 /* Add the option to nak'ed list. */
3131 bcopy (p, r, p[1]);
3132 r += p[1];
3133 rlen += p[1];
3134 }
3135
3136 /*
3137 * If we are about to conf-ack the request, but haven't seen
3138 * his address so far, gonna conf-nak it instead, with the
3139 * `address' option present and our idea of his address being
3140 * filled in there, to request negotiation of both addresses.
3141 *
3142 * XXX This can result in an endless req - nak loop if peer
3143 * doesn't want to send us his address. Q: What should we do
3144 * about it? XXX A: implement the max-failure counter.
3145 */
3146 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
3147 buf[0] = IPCP_OPT_ADDRESS;
3148 buf[1] = 6;
3149 buf[2] = hisaddr >> 24;
3150 buf[3] = hisaddr >> 16;
3151 buf[4] = hisaddr >> 8;
3152 buf[5] = hisaddr;
3153 rlen = 6;
3154 if (debug)
3155 log(-1, "still need hisaddr ");
3156 }
3157
3158 if (rlen) {
3159 if (debug)
3160 log(-1, " send conf-nak\n");
3161 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
3162 } else {
3163 if (debug)
3164 log(-1, " send conf-ack\n");
3165 sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
3166 h->ident, origlen, h+1);
3167 }
3168
3169 free (buf, M_TEMP);
3170 return (rlen == 0);
3171}
3172
3173/*
3174 * Analyze the IPCP Configure-Reject option list, and adjust our
3175 * negotiation.
3176 */
3177static void
3178sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3179{
3180 u_char *buf, *p;
3181 struct ifnet *ifp = SP2IFP(sp);
3182 int debug = ifp->if_flags & IFF_DEBUG;
3183
3184 len -= 4;
3185 buf = malloc (len, M_TEMP, M_NOWAIT);
3186 if (!buf)
3187 return;
3188
3189 if (debug)
3190 log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
3191 SPP_ARGS(ifp));
3192
3193 p = (void*) (h+1);
3194 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3195 len -= p[1], p += p[1]) {
3196 if (debug)
3197 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3198 switch (*p) {
3199 case IPCP_OPT_COMPRESSION:
3200 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESSION);
3201 break;
3202 case IPCP_OPT_ADDRESS:
3203 /*
3204 * Peer doesn't grok address option. This is
3205 * bad. XXX Should we better give up here?
3206 * XXX We could try old "addresses" option...
3207 */
3208 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
3209 break;
3210 }
3211 }
3212 if (debug)
3213 log(-1, "\n");
3214 free (buf, M_TEMP);
3215 return;
3216}
3217
3218/*
3219 * Analyze the IPCP Configure-NAK option list, and adjust our
3220 * negotiation.
3221 */
3222static void
3223sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3224{
3225 u_char *buf, *p;
3226 struct ifnet *ifp = SP2IFP(sp);
3227 int debug = ifp->if_flags & IFF_DEBUG;
3228 int desiredcomp;
3229 u_long wantaddr;
3230
3231 len -= 4;
3232 buf = malloc (len, M_TEMP, M_NOWAIT);
3233 if (!buf)
3234 return;
3235
3236 if (debug)
3237 log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
3238 SPP_ARGS(ifp));
3239
3240 p = (void*) (h+1);
3241 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3242 len -= p[1], p += p[1]) {
3243 if (debug)
3244 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3245 switch (*p) {
3246 case IPCP_OPT_COMPRESSION:
3247 if (len >= 6 && p[1] == 6) {
3248 desiredcomp = p[2] << 8 | p[3];
3249 if (debug)
3250 log(-1, "[wantcomp %#04x] ",
3251 desiredcomp);
3252 if (desiredcomp == IPCP_COMP_VJ) {
3253 sl_compress_init(sp->pp_comp, p[4]);
3254 sp->ipcp.max_state = p[4];
3255 sp->ipcp.compress_cid = p[5];
3256 if (debug)
3257 log(-1, "[agree] ");
3258 } else
3259 sp->ipcp.opts &=
3260 ~(1 << IPCP_OPT_COMPRESSION);
3261 }
3262 break;
3263 case IPCP_OPT_ADDRESS:
3264 /*
3265 * Peer doesn't like our local IP address. See
3266 * if we can do something for him. We'll drop
3267 * him our address then.
3268 */
3269 if (len >= 6 && p[1] == 6) {
3270 wantaddr = p[2] << 24 | p[3] << 16 |
3271 p[4] << 8 | p[5];
3272 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
3273 if (debug)
3274 log(-1, "[wantaddr %s] ",
3275 sppp_dotted_quad(wantaddr));
3276 /*
3277 * When doing dynamic address assignment,
3278 * we accept his offer. Otherwise, we
3279 * ignore it and thus continue to negotiate
3280 * our already existing value.
3281 * XXX: Bogus, if he said no once, he'll
3282 * just say no again, might as well die.
3283 */
3284 if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
3285 sppp_set_ip_addr(sp, wantaddr);
3286 if (debug)
3287 log(-1, "[agree] ");
3288 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
3289 }
3290 }
3291 break;
3292 }
3293 }
3294 if (debug)
3295 log(-1, "\n");
3296 free (buf, M_TEMP);
3297 return;
3298}
3299
3300static void
3301sppp_ipcp_tlu(struct sppp *sp)
3302{
3303 /* we are up - notify isdn daemon */
3304 if (sp->pp_con)
3305 sp->pp_con(sp);
3306}
3307
3308static void
3309sppp_ipcp_tld(struct sppp *sp)
3310{
3311}
3312
3313static void
3314sppp_ipcp_tls(struct sppp *sp)
3315{
3316 /* indicate to LCP that it must stay alive */
3317 sp->lcp.protos |= (1 << IDX_IPCP);
3318}
3319
3320static void
3321sppp_ipcp_tlf(struct sppp *sp)
3322{
3323 /* we no longer need LCP */
3324 sp->lcp.protos &= ~(1 << IDX_IPCP);
3325 sppp_lcp_check_and_close(sp);
3326}
3327
3328static void
3329sppp_ipcp_scr(struct sppp *sp)
3330{
3331 char opt[6 /* compression */ + 6 /* address */];
3332 u_long ouraddr;
3333 int i = 0;
3334
3335 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
3336 opt[i++] = IPCP_OPT_COMPRESSION;
3337 opt[i++] = 6;
3338 opt[i++] = IPCP_COMP_VJ >> 8;
3339 opt[i++] = IPCP_COMP_VJ;
3340 opt[i++] = sp->ipcp.max_state;
3341 opt[i++] = sp->ipcp.compress_cid;
3342 }
3343 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
3344 sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
3345 opt[i++] = IPCP_OPT_ADDRESS;
3346 opt[i++] = 6;
3347 opt[i++] = ouraddr >> 24;
3348 opt[i++] = ouraddr >> 16;
3349 opt[i++] = ouraddr >> 8;
3350 opt[i++] = ouraddr;
3351 }
3352
3353 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP];
3354 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
3355}
3356#else /* !INET */
3357static void
3358sppp_ipcp_init(struct sppp *sp)
3359{
3360}
3361
3362static void
3363sppp_ipcp_up(struct sppp *sp)
3364{
3365}
3366
3367static void
3368sppp_ipcp_down(struct sppp *sp)
3369{
3370}
3371
3372static void
3373sppp_ipcp_open(struct sppp *sp)
3374{
3375}
3376
3377static void
3378sppp_ipcp_close(struct sppp *sp)
3379{
3380}
3381
3382static void
3383sppp_ipcp_TO(void *cookie)
3384{
3385}
3386
3387static int
3388sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3389{
3390 return (0);
3391}
3392
3393static void
3394sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3395{
3396}
3397
3398static void
3399sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3400{
3401}
3402
3403static void
3404sppp_ipcp_tlu(struct sppp *sp)
3405{
3406}
3407
3408static void
3409sppp_ipcp_tld(struct sppp *sp)
3410{
3411}
3412
3413static void
3414sppp_ipcp_tls(struct sppp *sp)
3415{
3416}
3417
3418static void
3419sppp_ipcp_tlf(struct sppp *sp)
3420{
3421}
3422
3423static void
3424sppp_ipcp_scr(struct sppp *sp)
3425{
3426}
3427#endif
3428
3429/*
3430 *--------------------------------------------------------------------------*
3431 * *
3432 * The IPv6CP implementation. *
3433 * *
3434 *--------------------------------------------------------------------------*
3435 */
3436
3437#ifdef INET6
3438static void
3439sppp_ipv6cp_init(struct sppp *sp)
3440{
3441 sp->ipv6cp.opts = 0;
3442 sp->ipv6cp.flags = 0;
3443 sp->state[IDX_IPV6CP] = STATE_INITIAL;
3444 sp->fail_counter[IDX_IPV6CP] = 0;
3445 sp->pp_seq[IDX_IPV6CP] = 0;
3446 sp->pp_rseq[IDX_IPV6CP] = 0;
3447 callout_init(&sp->ch[IDX_IPV6CP], CALLOUT_MPSAFE);
3448}
3449
3450static void
3451sppp_ipv6cp_up(struct sppp *sp)
3452{
3453 sppp_up_event(&ipv6cp, sp);
3454}
3455
3456static void
3457sppp_ipv6cp_down(struct sppp *sp)
3458{
3459 sppp_down_event(&ipv6cp, sp);
3460}
3461
3462static void
3463sppp_ipv6cp_open(struct sppp *sp)
3464{
3465 STDDCL;
3466 struct in6_addr myaddr, hisaddr;
3467
3468#ifdef IPV6CP_MYIFID_DYN
3469 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN);
3470#else
3471 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN;
3472#endif
3473
3474 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0);
3475 /*
3476 * If we don't have our address, this probably means our
3477 * interface doesn't want to talk IPv6 at all. (This could
3478 * be the case if somebody wants to speak only IPX, for
3479 * example.) Don't open IPv6CP in this case.
3480 */
3481 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) {
3482 /* XXX this message should go away */
3483 if (debug)
3484 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n",
3485 SPP_ARGS(ifp));
3486 return;
3487 }
3488
3489 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3490 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3491 sppp_open_event(&ipv6cp, sp);
3492}
3493
3494static void
3495sppp_ipv6cp_close(struct sppp *sp)
3496{
3497 sppp_close_event(&ipv6cp, sp);
3498}
3499
3500static void
3501sppp_ipv6cp_TO(void *cookie)
3502{
3503 sppp_to_event(&ipv6cp, (struct sppp *)cookie);
3504}
3505
3506/*
3507 * Analyze a configure request. Return true if it was agreeable, and
3508 * caused action sca, false if it has been rejected or nak'ed, and
3509 * caused action scn. (The return value is used to make the state
3510 * transition decision in the state automaton.)
3511 */
3512static int
3513sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3514{
3515 u_char *buf, *r, *p;
3516 struct ifnet *ifp = SP2IFP(sp);
3517 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
3518 struct in6_addr myaddr, desiredaddr, suggestaddr;
3519 int ifidcount;
3520 int type;
3521 int collision, nohisaddr;
3522 char ip6buf[INET6_ADDRSTRLEN];
3523
3524 len -= 4;
3525 origlen = len;
3526 /*
3527 * Make sure to allocate a buf that can at least hold a
3528 * conf-nak with an `address' option. We might need it below.
3529 */
3530 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
3531 if (! buf)
3532 return (0);
3533
3534 /* pass 1: see if we can recognize them */
3535 if (debug)
3536 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:",
3537 SPP_ARGS(ifp));
3538 p = (void*) (h+1);
3539 ifidcount = 0;
3540 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3541 len-=p[1], p+=p[1]) {
3542 if (debug)
3543 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3544 switch (*p) {
3545 case IPV6CP_OPT_IFID:
3546 if (len >= 10 && p[1] == 10 && ifidcount == 0) {
3547 /* correctly formed address option */
3548 ifidcount++;
3549 continue;
3550 }
3551 if (debug)
3552 log(-1, " [invalid]");
3553 break;
3554#ifdef notyet
3555 case IPV6CP_OPT_COMPRESSION:
3556 if (len >= 4 && p[1] >= 4) {
3557 /* correctly formed compress option */
3558 continue;
3559 }
3560 if (debug)
3561 log(-1, " [invalid]");
3562 break;
3563#endif
3564 default:
3565 /* Others not supported. */
3566 if (debug)
3567 log(-1, " [rej]");
3568 break;
3569 }
3570 /* Add the option to rejected list. */
3571 bcopy (p, r, p[1]);
3572 r += p[1];
3573 rlen += p[1];
3574 }
3575 if (rlen) {
3576 if (debug)
3577 log(-1, " send conf-rej\n");
3578 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf);
3579 goto end;
3580 } else if (debug)
3581 log(-1, "\n");
3582
3583 /* pass 2: parse option values */
3584 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
3585 if (debug)
3586 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ",
3587 SPP_ARGS(ifp));
3588 p = (void*) (h+1);
3589 len = origlen;
3590 type = CONF_ACK;
3591 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3592 len-=p[1], p+=p[1]) {
3593 if (debug)
3594 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3595 switch (*p) {
3596#ifdef notyet
3597 case IPV6CP_OPT_COMPRESSION:
3598 continue;
3599#endif
3600 case IPV6CP_OPT_IFID:
3601 bzero(&desiredaddr, sizeof(desiredaddr));
3602 bcopy(&p[2], &desiredaddr.s6_addr[8], 8);
3603 collision = (bcmp(&desiredaddr.s6_addr[8],
3604 &myaddr.s6_addr[8], 8) == 0);
3605 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr);
3606
3607 desiredaddr.s6_addr16[0] = htons(0xfe80);
3608 (void)in6_setscope(&desiredaddr, SP2IFP(sp), NULL);
3609
3610 if (!collision && !nohisaddr) {
3611 /* no collision, hisaddr known - Conf-Ack */
3612 type = CONF_ACK;
3613
3614 if (debug) {
3615 log(-1, " %s [%s]",
3616 ip6_sprintf(ip6buf, &desiredaddr),
3617 sppp_cp_type_name(type));
3618 }
3619 continue;
3620 }
3621
3622 bzero(&suggestaddr, sizeof(&suggestaddr));
3623 if (collision && nohisaddr) {
3624 /* collision, hisaddr unknown - Conf-Rej */
3625 type = CONF_REJ;
3626 bzero(&p[2], 8);
3627 } else {
3628 /*
3629 * - no collision, hisaddr unknown, or
3630 * - collision, hisaddr known
3631 * Conf-Nak, suggest hisaddr
3632 */
3633 type = CONF_NAK;
3634 sppp_suggest_ip6_addr(sp, &suggestaddr);
3635 bcopy(&suggestaddr.s6_addr[8], &p[2], 8);
3636 }
3637 if (debug)
3638 log(-1, " %s [%s]",
3639 ip6_sprintf(ip6buf, &desiredaddr),
3640 sppp_cp_type_name(type));
3641 break;
3642 }
3643 /* Add the option to nak'ed list. */
3644 bcopy (p, r, p[1]);
3645 r += p[1];
3646 rlen += p[1];
3647 }
3648
3649 if (rlen == 0 && type == CONF_ACK) {
3650 if (debug)
3651 log(-1, " send %s\n", sppp_cp_type_name(type));
3652 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1);
3653 } else {
3654#ifdef DIAGNOSTIC
3655 if (type == CONF_ACK)
3656 panic("IPv6CP RCR: CONF_ACK with non-zero rlen");
3657#endif
3658
3659 if (debug) {
3660 log(-1, " send %s suggest %s\n",
3661 sppp_cp_type_name(type),
3662 ip6_sprintf(ip6buf, &suggestaddr));
3663 }
3664 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf);
3665 }
3666
3667 end:
3668 free (buf, M_TEMP);
3669 return (rlen == 0);
3670}
3671
3672/*
3673 * Analyze the IPv6CP Configure-Reject option list, and adjust our
3674 * negotiation.
3675 */
3676static void
3677sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3678{
3679 u_char *buf, *p;
3680 struct ifnet *ifp = SP2IFP(sp);
3681 int debug = ifp->if_flags & IFF_DEBUG;
3682
3683 len -= 4;
3684 buf = malloc (len, M_TEMP, M_NOWAIT);
3685 if (!buf)
3686 return;
3687
3688 if (debug)
3689 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:",
3690 SPP_ARGS(ifp));
3691
3692 p = (void*) (h+1);
3693 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3694 len -= p[1], p += p[1]) {
3695 if (debug)
3696 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3697 switch (*p) {
3698 case IPV6CP_OPT_IFID:
3699 /*
3700 * Peer doesn't grok address option. This is
3701 * bad. XXX Should we better give up here?
3702 */
3703 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID);
3704 break;
3705#ifdef notyet
3706 case IPV6CP_OPT_COMPRESS:
3707 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS);
3708 break;
3709#endif
3710 }
3711 }
3712 if (debug)
3713 log(-1, "\n");
3714 free (buf, M_TEMP);
3715 return;
3716}
3717
3718/*
3719 * Analyze the IPv6CP Configure-NAK option list, and adjust our
3720 * negotiation.
3721 */
3722static void
3723sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3724{
3725 u_char *buf, *p;
3726 struct ifnet *ifp = SP2IFP(sp);
3727 int debug = ifp->if_flags & IFF_DEBUG;
3728 struct in6_addr suggestaddr;
3729 char ip6buf[INET6_ADDRSTRLEN];
3730
3731 len -= 4;
3732 buf = malloc (len, M_TEMP, M_NOWAIT);
3733 if (!buf)
3734 return;
3735
3736 if (debug)
3737 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:",
3738 SPP_ARGS(ifp));
3739
3740 p = (void*) (h+1);
3741 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3742 len -= p[1], p += p[1]) {
3743 if (debug)
3744 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3745 switch (*p) {
3746 case IPV6CP_OPT_IFID:
3747 /*
3748 * Peer doesn't like our local ifid. See
3749 * if we can do something for him. We'll drop
3750 * him our address then.
3751 */
3752 if (len < 10 || p[1] != 10)
3753 break;
3754 bzero(&suggestaddr, sizeof(suggestaddr));
3755 suggestaddr.s6_addr16[0] = htons(0xfe80);
3756 (void)in6_setscope(&suggestaddr, SP2IFP(sp), NULL);
3757 bcopy(&p[2], &suggestaddr.s6_addr[8], 8);
3758
3759 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3760 if (debug)
3761 log(-1, " [suggestaddr %s]",
3762 ip6_sprintf(ip6buf, &suggestaddr));
3763#ifdef IPV6CP_MYIFID_DYN
3764 /*
3765 * When doing dynamic address assignment,
3766 * we accept his offer.
3767 */
3768 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) {
3769 struct in6_addr lastsuggest;
3770 /*
3771 * If <suggested myaddr from peer> equals to
3772 * <hisaddr we have suggested last time>,
3773 * we have a collision. generate new random
3774 * ifid.
3775 */
3776 sppp_suggest_ip6_addr(&lastsuggest);
3777 if (IN6_ARE_ADDR_EQUAL(&suggestaddr,
3778 lastsuggest)) {
3779 if (debug)
3780 log(-1, " [random]");
3781 sppp_gen_ip6_addr(sp, &suggestaddr);
3782 }
3783 sppp_set_ip6_addr(sp, &suggestaddr, 0);
3784 if (debug)
3785 log(-1, " [agree]");
3786 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3787 }
3788#else
3789 /*
3790 * Since we do not do dynamic address assignment,
3791 * we ignore it and thus continue to negotiate
3792 * our already existing value. This can possibly
3793 * go into infinite request-reject loop.
3794 *
3795 * This is not likely because we normally use
3796 * ifid based on MAC-address.
3797 * If you have no ethernet card on the node, too bad.
3798 * XXX should we use fail_counter?
3799 */
3800#endif
3801 break;
3802#ifdef notyet
3803 case IPV6CP_OPT_COMPRESS:
3804 /*
3805 * Peer wants different compression parameters.
3806 */
3807 break;
3808#endif
3809 }
3810 }
3811 if (debug)
3812 log(-1, "\n");
3813 free (buf, M_TEMP);
3814 return;
3815}
3816static void
3817sppp_ipv6cp_tlu(struct sppp *sp)
3818{
3819 /* we are up - notify isdn daemon */
3820 if (sp->pp_con)
3821 sp->pp_con(sp);
3822}
3823
3824static void
3825sppp_ipv6cp_tld(struct sppp *sp)
3826{
3827}
3828
3829static void
3830sppp_ipv6cp_tls(struct sppp *sp)
3831{
3832 /* indicate to LCP that it must stay alive */
3833 sp->lcp.protos |= (1 << IDX_IPV6CP);
3834}
3835
3836static void
3837sppp_ipv6cp_tlf(struct sppp *sp)
3838{
3839
3840#if 0 /* need #if 0 to close IPv6CP properly */
3841 /* we no longer need LCP */
3842 sp->lcp.protos &= ~(1 << IDX_IPV6CP);
3843 sppp_lcp_check_and_close(sp);
3844#endif
3845}
3846
3847static void
3848sppp_ipv6cp_scr(struct sppp *sp)
3849{
3850 char opt[10 /* ifid */ + 4 /* compression, minimum */];
3851 struct in6_addr ouraddr;
3852 int i = 0;
3853
3854 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) {
3855 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0);
3856 opt[i++] = IPV6CP_OPT_IFID;
3857 opt[i++] = 10;
3858 bcopy(&ouraddr.s6_addr[8], &opt[i], 8);
3859 i += 8;
3860 }
3861
3862#ifdef notyet
3863 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) {
3864 opt[i++] = IPV6CP_OPT_COMPRESSION;
3865 opt[i++] = 4;
3866 opt[i++] = 0; /* TBD */
3867 opt[i++] = 0; /* TBD */
3868 /* variable length data may follow */
3869 }
3870#endif
3871
3872 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP];
3873 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt);
3874}
3875#else /*INET6*/
3876static void sppp_ipv6cp_init(struct sppp *sp)
3877{
3878}
3879
3880static void sppp_ipv6cp_up(struct sppp *sp)
3881{
3882}
3883
3884static void sppp_ipv6cp_down(struct sppp *sp)
3885{
3886}
3887
3888
3889static void sppp_ipv6cp_open(struct sppp *sp)
3890{
3891}
3892
3893static void sppp_ipv6cp_close(struct sppp *sp)
3894{
3895}
3896
3897static void sppp_ipv6cp_TO(void *sp)
3898{
3899}
3900
3901static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3902{
3903 return 0;
3904}
3905
3906static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3907{
3908}
3909
3910static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3911{
3912}
3913
3914static void sppp_ipv6cp_tlu(struct sppp *sp)
3915{
3916}
3917
3918static void sppp_ipv6cp_tld(struct sppp *sp)
3919{
3920}
3921
3922static void sppp_ipv6cp_tls(struct sppp *sp)
3923{
3924}
3925
3926static void sppp_ipv6cp_tlf(struct sppp *sp)
3927{
3928}
3929
3930static void sppp_ipv6cp_scr(struct sppp *sp)
3931{
3932}
3933#endif /*INET6*/
3934
3935/*
3936 *--------------------------------------------------------------------------*
3937 * *
3938 * The CHAP implementation. *
3939 * *
3940 *--------------------------------------------------------------------------*
3941 */
3942
3943/*
3944 * The authentication protocols don't employ a full-fledged state machine as
3945 * the control protocols do, since they do have Open and Close events, but
3946 * not Up and Down, nor are they explicitly terminated. Also, use of the
3947 * authentication protocols may be different in both directions (this makes
3948 * sense, think of a machine that never accepts incoming calls but only
3949 * calls out, it doesn't require the called party to authenticate itself).
3950 *
3951 * Our state machine for the local authentication protocol (we are requesting
3952 * the peer to authenticate) looks like:
3953 *
3954 * RCA-
3955 * +--------------------------------------------+
3956 * V scn,tld|
3957 * +--------+ Close +---------+ RCA+
3958 * | |<----------------------------------| |------+
3959 * +--->| Closed | TO* | Opened | sca |
3960 * | | |-----+ +-------| |<-----+
3961 * | +--------+ irc | | +---------+
3962 * | ^ | | ^
3963 * | | | | |
3964 * | | | | |
3965 * | TO-| | | |
3966 * | |tld TO+ V | |
3967 * | | +------->+ | |
3968 * | | | | | |
3969 * | +--------+ V | |
3970 * | | |<----+<--------------------+ |
3971 * | | Req- | scr |
3972 * | | Sent | |
3973 * | | | |
3974 * | +--------+ |
3975 * | RCA- | | RCA+ |
3976 * +------+ +------------------------------------------+
3977 * scn,tld sca,irc,ict,tlu
3978 *
3979 *
3980 * with:
3981 *
3982 * Open: LCP reached authentication phase
3983 * Close: LCP reached terminate phase
3984 *
3985 * RCA+: received reply (pap-req, chap-response), acceptable
3986 * RCN: received reply (pap-req, chap-response), not acceptable
3987 * TO+: timeout with restart counter >= 0
3988 * TO-: timeout with restart counter < 0
3989 * TO*: reschedule timeout for CHAP
3990 *
3991 * scr: send request packet (none for PAP, chap-challenge)
3992 * sca: send ack packet (pap-ack, chap-success)
3993 * scn: send nak packet (pap-nak, chap-failure)
3994 * ict: initialize re-challenge timer (CHAP only)
3995 *
3996 * tlu: this-layer-up, LCP reaches network phase
3997 * tld: this-layer-down, LCP enters terminate phase
3998 *
3999 * Note that in CHAP mode, after sending a new challenge, while the state
4000 * automaton falls back into Req-Sent state, it doesn't signal a tld
4001 * event to LCP, so LCP remains in network phase. Only after not getting
4002 * any response (or after getting an unacceptable response), CHAP closes,
4003 * causing LCP to enter terminate phase.
4004 *
4005 * With PAP, there is no initial request that can be sent. The peer is
4006 * expected to send one based on the successful negotiation of PAP as
4007 * the authentication protocol during the LCP option negotiation.
4008 *
4009 * Incoming authentication protocol requests (remote requests
4010 * authentication, we are peer) don't employ a state machine at all,
4011 * they are simply answered. Some peers [Ascend P50 firmware rev
4012 * 4.50] react allergically when sending IPCP requests while they are
4013 * still in authentication phase (thereby violating the standard that
4014 * demands that these NCP packets are to be discarded), so we keep
4015 * track of the peer demanding us to authenticate, and only proceed to
4016 * phase network once we've seen a positive acknowledge for the
4017 * authentication.
4018 */
4019
4020/*
4021 * Handle incoming CHAP packets.
4022 */
4023static void
4024sppp_chap_input(struct sppp *sp, struct mbuf *m)
4025{
4026 STDDCL;
4027 struct lcp_header *h;
| 2103}
2104
2105/*
2106 * Change the state of a control protocol in the state automaton.
2107 * Takes care of starting/stopping the restart timer.
2108 */
2109static void
2110sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
2111{
2112 sp->state[cp->protoidx] = newstate;
2113
2114 callout_stop (&sp->ch[cp->protoidx]);
2115
2116 switch (newstate) {
2117 case STATE_INITIAL:
2118 case STATE_STARTING:
2119 case STATE_CLOSED:
2120 case STATE_STOPPED:
2121 case STATE_OPENED:
2122 break;
2123 case STATE_CLOSING:
2124 case STATE_STOPPING:
2125 case STATE_REQ_SENT:
2126 case STATE_ACK_RCVD:
2127 case STATE_ACK_SENT:
2128 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
2129 cp->TO, (void *)sp);
2130 break;
2131 }
2132}
2133
2134/*
2135 *--------------------------------------------------------------------------*
2136 * *
2137 * The LCP implementation. *
2138 * *
2139 *--------------------------------------------------------------------------*
2140 */
2141static void
2142sppp_pp_up(struct sppp *sp)
2143{
2144 SPPP_LOCK(sp);
2145 lcp.Up(sp);
2146 SPPP_UNLOCK(sp);
2147}
2148
2149static void
2150sppp_pp_down(struct sppp *sp)
2151{
2152 SPPP_LOCK(sp);
2153 lcp.Down(sp);
2154 SPPP_UNLOCK(sp);
2155}
2156
2157static void
2158sppp_lcp_init(struct sppp *sp)
2159{
2160 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2161 sp->lcp.magic = 0;
2162 sp->state[IDX_LCP] = STATE_INITIAL;
2163 sp->fail_counter[IDX_LCP] = 0;
2164 sp->pp_seq[IDX_LCP] = 0;
2165 sp->pp_rseq[IDX_LCP] = 0;
2166 sp->lcp.protos = 0;
2167 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2168
2169 /* Note that these values are relevant for all control protocols */
2170 sp->lcp.timeout = 3 * hz;
2171 sp->lcp.max_terminate = 2;
2172 sp->lcp.max_configure = 10;
2173 sp->lcp.max_failure = 10;
2174 callout_init(&sp->ch[IDX_LCP], CALLOUT_MPSAFE);
2175}
2176
2177static void
2178sppp_lcp_up(struct sppp *sp)
2179{
2180 STDDCL;
2181
2182 sp->pp_alivecnt = 0;
2183 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2184 sp->lcp.magic = 0;
2185 sp->lcp.protos = 0;
2186 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2187 /*
2188 * If we are authenticator, negotiate LCP_AUTH
2189 */
2190 if (sp->hisauth.proto != 0)
2191 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
2192 else
2193 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2194 sp->pp_flags &= ~PP_NEEDAUTH;
2195 /*
2196 * If this interface is passive or dial-on-demand, and we are
2197 * still in Initial state, it means we've got an incoming
2198 * call. Activate the interface.
2199 */
2200 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
2201 if (debug)
2202 log(LOG_DEBUG,
2203 SPP_FMT "Up event", SPP_ARGS(ifp));
2204 ifp->if_drv_flags |= IFF_DRV_RUNNING;
2205 if (sp->state[IDX_LCP] == STATE_INITIAL) {
2206 if (debug)
2207 log(-1, "(incoming call)\n");
2208 sp->pp_flags |= PP_CALLIN;
2209 lcp.Open(sp);
2210 } else if (debug)
2211 log(-1, "\n");
2212 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 &&
2213 (sp->state[IDX_LCP] == STATE_INITIAL)) {
2214 ifp->if_drv_flags |= IFF_DRV_RUNNING;
2215 lcp.Open(sp);
2216 }
2217
2218 sppp_up_event(&lcp, sp);
2219}
2220
2221static void
2222sppp_lcp_down(struct sppp *sp)
2223{
2224 STDDCL;
2225
2226 sppp_down_event(&lcp, sp);
2227
2228 /*
2229 * If this is neither a dial-on-demand nor a passive
2230 * interface, simulate an ``ifconfig down'' action, so the
2231 * administrator can force a redial by another ``ifconfig
2232 * up''. XXX For leased line operation, should we immediately
2233 * try to reopen the connection here?
2234 */
2235 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
2236 log(LOG_INFO,
2237 SPP_FMT "Down event, taking interface down.\n",
2238 SPP_ARGS(ifp));
2239 if_down(ifp);
2240 } else {
2241 if (debug)
2242 log(LOG_DEBUG,
2243 SPP_FMT "Down event (carrier loss)\n",
2244 SPP_ARGS(ifp));
2245 sp->pp_flags &= ~PP_CALLIN;
2246 if (sp->state[IDX_LCP] != STATE_INITIAL)
2247 lcp.Close(sp);
2248 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
2249 }
2250}
2251
2252static void
2253sppp_lcp_open(struct sppp *sp)
2254{
2255 sppp_open_event(&lcp, sp);
2256}
2257
2258static void
2259sppp_lcp_close(struct sppp *sp)
2260{
2261 sppp_close_event(&lcp, sp);
2262}
2263
2264static void
2265sppp_lcp_TO(void *cookie)
2266{
2267 sppp_to_event(&lcp, (struct sppp *)cookie);
2268}
2269
2270/*
2271 * Analyze a configure request. Return true if it was agreeable, and
2272 * caused action sca, false if it has been rejected or nak'ed, and
2273 * caused action scn. (The return value is used to make the state
2274 * transition decision in the state automaton.)
2275 */
2276static int
2277sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2278{
2279 STDDCL;
2280 u_char *buf, *r, *p;
2281 int origlen, rlen;
2282 u_long nmagic;
2283 u_short authproto;
2284
2285 len -= 4;
2286 origlen = len;
2287 buf = r = malloc (len, M_TEMP, M_NOWAIT);
2288 if (! buf)
2289 return (0);
2290
2291 if (debug)
2292 log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
2293 SPP_ARGS(ifp));
2294
2295 /* pass 1: check for things that need to be rejected */
2296 p = (void*) (h+1);
2297 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2298 len-=p[1], p+=p[1]) {
2299 if (debug)
2300 log(-1, " %s ", sppp_lcp_opt_name(*p));
2301 switch (*p) {
2302 case LCP_OPT_MAGIC:
2303 /* Magic number. */
2304 if (len >= 6 && p[1] == 6)
2305 continue;
2306 if (debug)
2307 log(-1, "[invalid] ");
2308 break;
2309 case LCP_OPT_ASYNC_MAP:
2310 /* Async control character map. */
2311 if (len >= 6 && p[1] == 6)
2312 continue;
2313 if (debug)
2314 log(-1, "[invalid] ");
2315 break;
2316 case LCP_OPT_MRU:
2317 /* Maximum receive unit. */
2318 if (len >= 4 && p[1] == 4)
2319 continue;
2320 if (debug)
2321 log(-1, "[invalid] ");
2322 break;
2323 case LCP_OPT_AUTH_PROTO:
2324 if (len < 4) {
2325 if (debug)
2326 log(-1, "[invalid] ");
2327 break;
2328 }
2329 authproto = (p[2] << 8) + p[3];
2330 if (authproto == PPP_CHAP && p[1] != 5) {
2331 if (debug)
2332 log(-1, "[invalid chap len] ");
2333 break;
2334 }
2335 if (sp->myauth.proto == 0) {
2336 /* we are not configured to do auth */
2337 if (debug)
2338 log(-1, "[not configured] ");
2339 break;
2340 }
2341 /*
2342 * Remote want us to authenticate, remember this,
2343 * so we stay in PHASE_AUTHENTICATE after LCP got
2344 * up.
2345 */
2346 sp->pp_flags |= PP_NEEDAUTH;
2347 continue;
2348 default:
2349 /* Others not supported. */
2350 if (debug)
2351 log(-1, "[rej] ");
2352 break;
2353 }
2354 /* Add the option to rejected list. */
2355 bcopy (p, r, p[1]);
2356 r += p[1];
2357 rlen += p[1];
2358 }
2359 if (rlen) {
2360 if (debug)
2361 log(-1, " send conf-rej\n");
2362 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2363 return 0;
2364 } else if (debug)
2365 log(-1, "\n");
2366
2367 /*
2368 * pass 2: check for option values that are unacceptable and
2369 * thus require to be nak'ed.
2370 */
2371 if (debug)
2372 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
2373 SPP_ARGS(ifp));
2374
2375 p = (void*) (h+1);
2376 len = origlen;
2377 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2378 len-=p[1], p+=p[1]) {
2379 if (debug)
2380 log(-1, " %s ", sppp_lcp_opt_name(*p));
2381 switch (*p) {
2382 case LCP_OPT_MAGIC:
2383 /* Magic number -- extract. */
2384 nmagic = (u_long)p[2] << 24 |
2385 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2386 if (nmagic != sp->lcp.magic) {
2387 sp->pp_loopcnt = 0;
2388 if (debug)
2389 log(-1, "0x%lx ", nmagic);
2390 continue;
2391 }
2392 if (debug && sp->pp_loopcnt < MAXALIVECNT*5)
2393 log(-1, "[glitch] ");
2394 ++sp->pp_loopcnt;
2395 /*
2396 * We negate our magic here, and NAK it. If
2397 * we see it later in an NAK packet, we
2398 * suggest a new one.
2399 */
2400 nmagic = ~sp->lcp.magic;
2401 /* Gonna NAK it. */
2402 p[2] = nmagic >> 24;
2403 p[3] = nmagic >> 16;
2404 p[4] = nmagic >> 8;
2405 p[5] = nmagic;
2406 break;
2407
2408 case LCP_OPT_ASYNC_MAP:
2409 /*
2410 * Async control character map -- just ignore it.
2411 *
2412 * Quote from RFC 1662, chapter 6:
2413 * To enable this functionality, synchronous PPP
2414 * implementations MUST always respond to the
2415 * Async-Control-Character-Map Configuration
2416 * Option with the LCP Configure-Ack. However,
2417 * acceptance of the Configuration Option does
2418 * not imply that the synchronous implementation
2419 * will do any ACCM mapping. Instead, all such
2420 * octet mapping will be performed by the
2421 * asynchronous-to-synchronous converter.
2422 */
2423 continue;
2424
2425 case LCP_OPT_MRU:
2426 /*
2427 * Maximum receive unit. Always agreeable,
2428 * but ignored by now.
2429 */
2430 sp->lcp.their_mru = p[2] * 256 + p[3];
2431 if (debug)
2432 log(-1, "%lu ", sp->lcp.their_mru);
2433 continue;
2434
2435 case LCP_OPT_AUTH_PROTO:
2436 authproto = (p[2] << 8) + p[3];
2437 if (sp->myauth.proto != authproto) {
2438 /* not agreed, nak */
2439 if (debug)
2440 log(-1, "[mine %s != his %s] ",
2441 sppp_proto_name(sp->hisauth.proto),
2442 sppp_proto_name(authproto));
2443 p[2] = sp->myauth.proto >> 8;
2444 p[3] = sp->myauth.proto;
2445 break;
2446 }
2447 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
2448 if (debug)
2449 log(-1, "[chap not MD5] ");
2450 p[4] = CHAP_MD5;
2451 break;
2452 }
2453 continue;
2454 }
2455 /* Add the option to nak'ed list. */
2456 bcopy (p, r, p[1]);
2457 r += p[1];
2458 rlen += p[1];
2459 }
2460 if (rlen) {
2461 /*
2462 * Local and remote magics equal -- loopback?
2463 */
2464 if (sp->pp_loopcnt >= MAXALIVECNT*5) {
2465 if (sp->pp_loopcnt == MAXALIVECNT*5)
2466 printf (SPP_FMT "loopback\n",
2467 SPP_ARGS(ifp));
2468 if (ifp->if_flags & IFF_UP) {
2469 if_down(ifp);
2470 sppp_qflush(&sp->pp_cpq);
2471 /* XXX ? */
2472 lcp.Down(sp);
2473 lcp.Up(sp);
2474 }
2475 } else if (!sp->pp_loopcnt &&
2476 ++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
2477 if (debug)
2478 log(-1, " max_failure (%d) exceeded, "
2479 "send conf-rej\n",
2480 sp->lcp.max_failure);
2481 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2482 } else {
2483 if (debug)
2484 log(-1, " send conf-nak\n");
2485 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
2486 }
2487 } else {
2488 if (debug)
2489 log(-1, " send conf-ack\n");
2490 sp->fail_counter[IDX_LCP] = 0;
2491 sp->pp_loopcnt = 0;
2492 sppp_cp_send (sp, PPP_LCP, CONF_ACK,
2493 h->ident, origlen, h+1);
2494 }
2495
2496 free (buf, M_TEMP);
2497 return (rlen == 0);
2498}
2499
2500/*
2501 * Analyze the LCP Configure-Reject option list, and adjust our
2502 * negotiation.
2503 */
2504static void
2505sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
2506{
2507 STDDCL;
2508 u_char *buf, *p;
2509
2510 len -= 4;
2511 buf = malloc (len, M_TEMP, M_NOWAIT);
2512 if (!buf)
2513 return;
2514
2515 if (debug)
2516 log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
2517 SPP_ARGS(ifp));
2518
2519 p = (void*) (h+1);
2520 for (; len >= 2 && p[1] >= 2 && len >= p[1];
2521 len -= p[1], p += p[1]) {
2522 if (debug)
2523 log(-1, " %s ", sppp_lcp_opt_name(*p));
2524 switch (*p) {
2525 case LCP_OPT_MAGIC:
2526 /* Magic number -- can't use it, use 0 */
2527 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
2528 sp->lcp.magic = 0;
2529 break;
2530 case LCP_OPT_MRU:
2531 /*
2532 * Should not be rejected anyway, since we only
2533 * negotiate a MRU if explicitly requested by
2534 * peer.
2535 */
2536 sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
2537 break;
2538 case LCP_OPT_AUTH_PROTO:
2539 /*
2540 * Peer doesn't want to authenticate himself,
2541 * deny unless this is a dialout call, and
2542 * AUTHFLAG_NOCALLOUT is set.
2543 */
2544 if ((sp->pp_flags & PP_CALLIN) == 0 &&
2545 (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
2546 if (debug)
2547 log(-1, "[don't insist on auth "
2548 "for callout]");
2549 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2550 break;
2551 }
2552 if (debug)
2553 log(-1, "[access denied]\n");
2554 lcp.Close(sp);
2555 break;
2556 }
2557 }
2558 if (debug)
2559 log(-1, "\n");
2560 free (buf, M_TEMP);
2561 return;
2562}
2563
2564/*
2565 * Analyze the LCP Configure-NAK option list, and adjust our
2566 * negotiation.
2567 */
2568static void
2569sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
2570{
2571 STDDCL;
2572 u_char *buf, *p;
2573 u_long magic;
2574
2575 len -= 4;
2576 buf = malloc (len, M_TEMP, M_NOWAIT);
2577 if (!buf)
2578 return;
2579
2580 if (debug)
2581 log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
2582 SPP_ARGS(ifp));
2583
2584 p = (void*) (h+1);
2585 for (; len >= 2 && p[1] >= 2 && len >= p[1];
2586 len -= p[1], p += p[1]) {
2587 if (debug)
2588 log(-1, " %s ", sppp_lcp_opt_name(*p));
2589 switch (*p) {
2590 case LCP_OPT_MAGIC:
2591 /* Magic number -- renegotiate */
2592 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
2593 len >= 6 && p[1] == 6) {
2594 magic = (u_long)p[2] << 24 |
2595 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2596 /*
2597 * If the remote magic is our negated one,
2598 * this looks like a loopback problem.
2599 * Suggest a new magic to make sure.
2600 */
2601 if (magic == ~sp->lcp.magic) {
2602 if (debug)
2603 log(-1, "magic glitch ");
2604 sp->lcp.magic = random();
2605 } else {
2606 sp->lcp.magic = magic;
2607 if (debug)
2608 log(-1, "%lu ", magic);
2609 }
2610 }
2611 break;
2612 case LCP_OPT_MRU:
2613 /*
2614 * Peer wants to advise us to negotiate an MRU.
2615 * Agree on it if it's reasonable, or use
2616 * default otherwise.
2617 */
2618 if (len >= 4 && p[1] == 4) {
2619 u_int mru = p[2] * 256 + p[3];
2620 if (debug)
2621 log(-1, "%d ", mru);
2622 if (mru < PP_MTU || mru > PP_MAX_MRU)
2623 mru = PP_MTU;
2624 sp->lcp.mru = mru;
2625 sp->lcp.opts |= (1 << LCP_OPT_MRU);
2626 }
2627 break;
2628 case LCP_OPT_AUTH_PROTO:
2629 /*
2630 * Peer doesn't like our authentication method,
2631 * deny.
2632 */
2633 if (debug)
2634 log(-1, "[access denied]\n");
2635 lcp.Close(sp);
2636 break;
2637 }
2638 }
2639 if (debug)
2640 log(-1, "\n");
2641 free (buf, M_TEMP);
2642 return;
2643}
2644
2645static void
2646sppp_lcp_tlu(struct sppp *sp)
2647{
2648 STDDCL;
2649 int i;
2650 u_long mask;
2651
2652 /* XXX ? */
2653 if (! (ifp->if_flags & IFF_UP) &&
2654 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2655 /* Coming out of loopback mode. */
2656 if_up(ifp);
2657 printf (SPP_FMT "up\n", SPP_ARGS(ifp));
2658 }
2659
2660 for (i = 0; i < IDX_COUNT; i++)
2661 if ((cps[i])->flags & CP_QUAL)
2662 (cps[i])->Open(sp);
2663
2664 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
2665 (sp->pp_flags & PP_NEEDAUTH) != 0)
2666 sp->pp_phase = PHASE_AUTHENTICATE;
2667 else
2668 sp->pp_phase = PHASE_NETWORK;
2669
2670 if (debug)
2671 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2672 sppp_phase_name(sp->pp_phase));
2673
2674 /*
2675 * Open all authentication protocols. This is even required
2676 * if we already proceeded to network phase, since it might be
2677 * that remote wants us to authenticate, so we might have to
2678 * send a PAP request. Undesired authentication protocols
2679 * don't do anything when they get an Open event.
2680 */
2681 for (i = 0; i < IDX_COUNT; i++)
2682 if ((cps[i])->flags & CP_AUTH)
2683 (cps[i])->Open(sp);
2684
2685 if (sp->pp_phase == PHASE_NETWORK) {
2686 /* Notify all NCPs. */
2687 for (i = 0; i < IDX_COUNT; i++)
2688 if (((cps[i])->flags & CP_NCP) &&
2689 /*
2690 * XXX
2691 * Hack to administratively disable IPv6 if
2692 * not desired. Perhaps we should have another
2693 * flag for this, but right now, we can make
2694 * all struct cp's read/only.
2695 */
2696 (cps[i] != &ipv6cp ||
2697 (sp->confflags & CONF_ENABLE_IPV6)))
2698 (cps[i])->Open(sp);
2699 }
2700
2701 /* Send Up events to all started protos. */
2702 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2703 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0)
2704 (cps[i])->Up(sp);
2705
2706 /* notify low-level driver of state change */
2707 if (sp->pp_chg)
2708 sp->pp_chg(sp, (int)sp->pp_phase);
2709
2710 if (sp->pp_phase == PHASE_NETWORK)
2711 /* if no NCP is starting, close down */
2712 sppp_lcp_check_and_close(sp);
2713}
2714
2715static void
2716sppp_lcp_tld(struct sppp *sp)
2717{
2718 STDDCL;
2719 int i;
2720 u_long mask;
2721
2722 sp->pp_phase = PHASE_TERMINATE;
2723
2724 if (debug)
2725 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2726 sppp_phase_name(sp->pp_phase));
2727
2728 /*
2729 * Take upper layers down. We send the Down event first and
2730 * the Close second to prevent the upper layers from sending
2731 * ``a flurry of terminate-request packets'', as the RFC
2732 * describes it.
2733 */
2734 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2735 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) {
2736 (cps[i])->Down(sp);
2737 (cps[i])->Close(sp);
2738 }
2739}
2740
2741static void
2742sppp_lcp_tls(struct sppp *sp)
2743{
2744 STDDCL;
2745
2746 sp->pp_phase = PHASE_ESTABLISH;
2747
2748 if (debug)
2749 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2750 sppp_phase_name(sp->pp_phase));
2751
2752 /* Notify lower layer if desired. */
2753 if (sp->pp_tls)
2754 (sp->pp_tls)(sp);
2755 else
2756 (sp->pp_up)(sp);
2757}
2758
2759static void
2760sppp_lcp_tlf(struct sppp *sp)
2761{
2762 STDDCL;
2763
2764 sp->pp_phase = PHASE_DEAD;
2765 if (debug)
2766 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2767 sppp_phase_name(sp->pp_phase));
2768
2769 /* Notify lower layer if desired. */
2770 if (sp->pp_tlf)
2771 (sp->pp_tlf)(sp);
2772 else
2773 (sp->pp_down)(sp);
2774}
2775
2776static void
2777sppp_lcp_scr(struct sppp *sp)
2778{
2779 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
2780 int i = 0;
2781 u_short authproto;
2782
2783 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
2784 if (! sp->lcp.magic)
2785 sp->lcp.magic = random();
2786 opt[i++] = LCP_OPT_MAGIC;
2787 opt[i++] = 6;
2788 opt[i++] = sp->lcp.magic >> 24;
2789 opt[i++] = sp->lcp.magic >> 16;
2790 opt[i++] = sp->lcp.magic >> 8;
2791 opt[i++] = sp->lcp.magic;
2792 }
2793
2794 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
2795 opt[i++] = LCP_OPT_MRU;
2796 opt[i++] = 4;
2797 opt[i++] = sp->lcp.mru >> 8;
2798 opt[i++] = sp->lcp.mru;
2799 }
2800
2801 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
2802 authproto = sp->hisauth.proto;
2803 opt[i++] = LCP_OPT_AUTH_PROTO;
2804 opt[i++] = authproto == PPP_CHAP? 5: 4;
2805 opt[i++] = authproto >> 8;
2806 opt[i++] = authproto;
2807 if (authproto == PPP_CHAP)
2808 opt[i++] = CHAP_MD5;
2809 }
2810
2811 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP];
2812 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
2813}
2814
2815/*
2816 * Check the open NCPs, return true if at least one NCP is open.
2817 */
2818static int
2819sppp_ncp_check(struct sppp *sp)
2820{
2821 int i, mask;
2822
2823 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2824 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP)
2825 return 1;
2826 return 0;
2827}
2828
2829/*
2830 * Re-check the open NCPs and see if we should terminate the link.
2831 * Called by the NCPs during their tlf action handling.
2832 */
2833static void
2834sppp_lcp_check_and_close(struct sppp *sp)
2835{
2836
2837 if (sp->pp_phase < PHASE_NETWORK)
2838 /* don't bother, we are already going down */
2839 return;
2840
2841 if (sppp_ncp_check(sp))
2842 return;
2843
2844 lcp.Close(sp);
2845}
2846
2847/*
2848 *--------------------------------------------------------------------------*
2849 * *
2850 * The IPCP implementation. *
2851 * *
2852 *--------------------------------------------------------------------------*
2853 */
2854
2855#ifdef INET
2856static void
2857sppp_ipcp_init(struct sppp *sp)
2858{
2859 sp->ipcp.opts = 0;
2860 sp->ipcp.flags = 0;
2861 sp->state[IDX_IPCP] = STATE_INITIAL;
2862 sp->fail_counter[IDX_IPCP] = 0;
2863 sp->pp_seq[IDX_IPCP] = 0;
2864 sp->pp_rseq[IDX_IPCP] = 0;
2865 callout_init(&sp->ch[IDX_IPCP], CALLOUT_MPSAFE);
2866}
2867
2868static void
2869sppp_ipcp_up(struct sppp *sp)
2870{
2871 sppp_up_event(&ipcp, sp);
2872}
2873
2874static void
2875sppp_ipcp_down(struct sppp *sp)
2876{
2877 sppp_down_event(&ipcp, sp);
2878}
2879
2880static void
2881sppp_ipcp_open(struct sppp *sp)
2882{
2883 STDDCL;
2884 u_long myaddr, hisaddr;
2885
2886 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN | IPCP_MYADDR_SEEN |
2887 IPCP_MYADDR_DYN | IPCP_VJ);
2888 sp->ipcp.opts = 0;
2889
2890 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
2891 /*
2892 * If we don't have his address, this probably means our
2893 * interface doesn't want to talk IP at all. (This could
2894 * be the case if somebody wants to speak only IPX, for
2895 * example.) Don't open IPCP in this case.
2896 */
2897 if (hisaddr == 0L) {
2898 /* XXX this message should go away */
2899 if (debug)
2900 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
2901 SPP_ARGS(ifp));
2902 return;
2903 }
2904 if (myaddr == 0L) {
2905 /*
2906 * I don't have an assigned address, so i need to
2907 * negotiate my address.
2908 */
2909 sp->ipcp.flags |= IPCP_MYADDR_DYN;
2910 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
2911 } else
2912 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
2913 if (sp->confflags & CONF_ENABLE_VJ) {
2914 sp->ipcp.opts |= (1 << IPCP_OPT_COMPRESSION);
2915 sp->ipcp.max_state = MAX_STATES - 1;
2916 sp->ipcp.compress_cid = 1;
2917 }
2918 sppp_open_event(&ipcp, sp);
2919}
2920
2921static void
2922sppp_ipcp_close(struct sppp *sp)
2923{
2924 sppp_close_event(&ipcp, sp);
2925 if (sp->ipcp.flags & IPCP_MYADDR_DYN)
2926 /*
2927 * My address was dynamic, clear it again.
2928 */
2929 sppp_set_ip_addr(sp, 0L);
2930}
2931
2932static void
2933sppp_ipcp_TO(void *cookie)
2934{
2935 sppp_to_event(&ipcp, (struct sppp *)cookie);
2936}
2937
2938/*
2939 * Analyze a configure request. Return true if it was agreeable, and
2940 * caused action sca, false if it has been rejected or nak'ed, and
2941 * caused action scn. (The return value is used to make the state
2942 * transition decision in the state automaton.)
2943 */
2944static int
2945sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2946{
2947 u_char *buf, *r, *p;
2948 struct ifnet *ifp = SP2IFP(sp);
2949 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
2950 u_long hisaddr, desiredaddr;
2951 int gotmyaddr = 0;
2952 int desiredcomp;
2953
2954 len -= 4;
2955 origlen = len;
2956 /*
2957 * Make sure to allocate a buf that can at least hold a
2958 * conf-nak with an `address' option. We might need it below.
2959 */
2960 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
2961 if (! buf)
2962 return (0);
2963
2964 /* pass 1: see if we can recognize them */
2965 if (debug)
2966 log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
2967 SPP_ARGS(ifp));
2968 p = (void*) (h+1);
2969 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
2970 len-=p[1], p+=p[1]) {
2971 if (debug)
2972 log(-1, " %s ", sppp_ipcp_opt_name(*p));
2973 switch (*p) {
2974 case IPCP_OPT_COMPRESSION:
2975 if (!(sp->confflags & CONF_ENABLE_VJ)) {
2976 /* VJ compression administratively disabled */
2977 if (debug)
2978 log(-1, "[locally disabled] ");
2979 break;
2980 }
2981 /*
2982 * In theory, we should only conf-rej an
2983 * option that is shorter than RFC 1618
2984 * requires (i.e. < 4), and should conf-nak
2985 * anything else that is not VJ. However,
2986 * since our algorithm always uses the
2987 * original option to NAK it with new values,
2988 * things would become more complicated. In
2989 * pratice, the only commonly implemented IP
2990 * compression option is VJ anyway, so the
2991 * difference is negligible.
2992 */
2993 if (len >= 6 && p[1] == 6) {
2994 /*
2995 * correctly formed compression option
2996 * that could be VJ compression
2997 */
2998 continue;
2999 }
3000 if (debug)
3001 log(-1,
3002 "optlen %d [invalid/unsupported] ",
3003 p[1]);
3004 break;
3005 case IPCP_OPT_ADDRESS:
3006 if (len >= 6 && p[1] == 6) {
3007 /* correctly formed address option */
3008 continue;
3009 }
3010 if (debug)
3011 log(-1, "[invalid] ");
3012 break;
3013 default:
3014 /* Others not supported. */
3015 if (debug)
3016 log(-1, "[rej] ");
3017 break;
3018 }
3019 /* Add the option to rejected list. */
3020 bcopy (p, r, p[1]);
3021 r += p[1];
3022 rlen += p[1];
3023 }
3024 if (rlen) {
3025 if (debug)
3026 log(-1, " send conf-rej\n");
3027 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
3028 return 0;
3029 } else if (debug)
3030 log(-1, "\n");
3031
3032 /* pass 2: parse option values */
3033 sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
3034 if (debug)
3035 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
3036 SPP_ARGS(ifp));
3037 p = (void*) (h+1);
3038 len = origlen;
3039 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3040 len-=p[1], p+=p[1]) {
3041 if (debug)
3042 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3043 switch (*p) {
3044 case IPCP_OPT_COMPRESSION:
3045 desiredcomp = p[2] << 8 | p[3];
3046 /* We only support VJ */
3047 if (desiredcomp == IPCP_COMP_VJ) {
3048 if (debug)
3049 log(-1, "VJ [ack] ");
3050 sp->ipcp.flags |= IPCP_VJ;
3051 sl_compress_init(sp->pp_comp, p[4]);
3052 sp->ipcp.max_state = p[4];
3053 sp->ipcp.compress_cid = p[5];
3054 continue;
3055 }
3056 if (debug)
3057 log(-1,
3058 "compproto %#04x [not supported] ",
3059 desiredcomp);
3060 p[2] = IPCP_COMP_VJ >> 8;
3061 p[3] = IPCP_COMP_VJ;
3062 p[4] = sp->ipcp.max_state;
3063 p[5] = sp->ipcp.compress_cid;
3064 break;
3065 case IPCP_OPT_ADDRESS:
3066 /* This is the address he wants in his end */
3067 desiredaddr = p[2] << 24 | p[3] << 16 |
3068 p[4] << 8 | p[5];
3069 if (desiredaddr == hisaddr ||
3070 (hisaddr >= 1 && hisaddr <= 254 && desiredaddr != 0)) {
3071 /*
3072 * Peer's address is same as our value,
3073 * or we have set it to 0.0.0.* to
3074 * indicate that we do not really care,
3075 * this is agreeable. Gonna conf-ack
3076 * it.
3077 */
3078 if (debug)
3079 log(-1, "%s [ack] ",
3080 sppp_dotted_quad(hisaddr));
3081 /* record that we've seen it already */
3082 sp->ipcp.flags |= IPCP_HISADDR_SEEN;
3083 continue;
3084 }
3085 /*
3086 * The address wasn't agreeable. This is either
3087 * he sent us 0.0.0.0, asking to assign him an
3088 * address, or he send us another address not
3089 * matching our value. Either case, we gonna
3090 * conf-nak it with our value.
3091 * XXX: we should "rej" if hisaddr == 0
3092 */
3093 if (debug) {
3094 if (desiredaddr == 0)
3095 log(-1, "[addr requested] ");
3096 else
3097 log(-1, "%s [not agreed] ",
3098 sppp_dotted_quad(desiredaddr));
3099
3100 }
3101 p[2] = hisaddr >> 24;
3102 p[3] = hisaddr >> 16;
3103 p[4] = hisaddr >> 8;
3104 p[5] = hisaddr;
3105 break;
3106 }
3107 /* Add the option to nak'ed list. */
3108 bcopy (p, r, p[1]);
3109 r += p[1];
3110 rlen += p[1];
3111 }
3112
3113 /*
3114 * If we are about to conf-ack the request, but haven't seen
3115 * his address so far, gonna conf-nak it instead, with the
3116 * `address' option present and our idea of his address being
3117 * filled in there, to request negotiation of both addresses.
3118 *
3119 * XXX This can result in an endless req - nak loop if peer
3120 * doesn't want to send us his address. Q: What should we do
3121 * about it? XXX A: implement the max-failure counter.
3122 */
3123 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
3124 buf[0] = IPCP_OPT_ADDRESS;
3125 buf[1] = 6;
3126 buf[2] = hisaddr >> 24;
3127 buf[3] = hisaddr >> 16;
3128 buf[4] = hisaddr >> 8;
3129 buf[5] = hisaddr;
3130 rlen = 6;
3131 if (debug)
3132 log(-1, "still need hisaddr ");
3133 }
3134
3135 if (rlen) {
3136 if (debug)
3137 log(-1, " send conf-nak\n");
3138 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
3139 } else {
3140 if (debug)
3141 log(-1, " send conf-ack\n");
3142 sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
3143 h->ident, origlen, h+1);
3144 }
3145
3146 free (buf, M_TEMP);
3147 return (rlen == 0);
3148}
3149
3150/*
3151 * Analyze the IPCP Configure-Reject option list, and adjust our
3152 * negotiation.
3153 */
3154static void
3155sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3156{
3157 u_char *buf, *p;
3158 struct ifnet *ifp = SP2IFP(sp);
3159 int debug = ifp->if_flags & IFF_DEBUG;
3160
3161 len -= 4;
3162 buf = malloc (len, M_TEMP, M_NOWAIT);
3163 if (!buf)
3164 return;
3165
3166 if (debug)
3167 log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
3168 SPP_ARGS(ifp));
3169
3170 p = (void*) (h+1);
3171 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3172 len -= p[1], p += p[1]) {
3173 if (debug)
3174 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3175 switch (*p) {
3176 case IPCP_OPT_COMPRESSION:
3177 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESSION);
3178 break;
3179 case IPCP_OPT_ADDRESS:
3180 /*
3181 * Peer doesn't grok address option. This is
3182 * bad. XXX Should we better give up here?
3183 * XXX We could try old "addresses" option...
3184 */
3185 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
3186 break;
3187 }
3188 }
3189 if (debug)
3190 log(-1, "\n");
3191 free (buf, M_TEMP);
3192 return;
3193}
3194
3195/*
3196 * Analyze the IPCP Configure-NAK option list, and adjust our
3197 * negotiation.
3198 */
3199static void
3200sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3201{
3202 u_char *buf, *p;
3203 struct ifnet *ifp = SP2IFP(sp);
3204 int debug = ifp->if_flags & IFF_DEBUG;
3205 int desiredcomp;
3206 u_long wantaddr;
3207
3208 len -= 4;
3209 buf = malloc (len, M_TEMP, M_NOWAIT);
3210 if (!buf)
3211 return;
3212
3213 if (debug)
3214 log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
3215 SPP_ARGS(ifp));
3216
3217 p = (void*) (h+1);
3218 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3219 len -= p[1], p += p[1]) {
3220 if (debug)
3221 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3222 switch (*p) {
3223 case IPCP_OPT_COMPRESSION:
3224 if (len >= 6 && p[1] == 6) {
3225 desiredcomp = p[2] << 8 | p[3];
3226 if (debug)
3227 log(-1, "[wantcomp %#04x] ",
3228 desiredcomp);
3229 if (desiredcomp == IPCP_COMP_VJ) {
3230 sl_compress_init(sp->pp_comp, p[4]);
3231 sp->ipcp.max_state = p[4];
3232 sp->ipcp.compress_cid = p[5];
3233 if (debug)
3234 log(-1, "[agree] ");
3235 } else
3236 sp->ipcp.opts &=
3237 ~(1 << IPCP_OPT_COMPRESSION);
3238 }
3239 break;
3240 case IPCP_OPT_ADDRESS:
3241 /*
3242 * Peer doesn't like our local IP address. See
3243 * if we can do something for him. We'll drop
3244 * him our address then.
3245 */
3246 if (len >= 6 && p[1] == 6) {
3247 wantaddr = p[2] << 24 | p[3] << 16 |
3248 p[4] << 8 | p[5];
3249 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
3250 if (debug)
3251 log(-1, "[wantaddr %s] ",
3252 sppp_dotted_quad(wantaddr));
3253 /*
3254 * When doing dynamic address assignment,
3255 * we accept his offer. Otherwise, we
3256 * ignore it and thus continue to negotiate
3257 * our already existing value.
3258 * XXX: Bogus, if he said no once, he'll
3259 * just say no again, might as well die.
3260 */
3261 if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
3262 sppp_set_ip_addr(sp, wantaddr);
3263 if (debug)
3264 log(-1, "[agree] ");
3265 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
3266 }
3267 }
3268 break;
3269 }
3270 }
3271 if (debug)
3272 log(-1, "\n");
3273 free (buf, M_TEMP);
3274 return;
3275}
3276
3277static void
3278sppp_ipcp_tlu(struct sppp *sp)
3279{
3280 /* we are up - notify isdn daemon */
3281 if (sp->pp_con)
3282 sp->pp_con(sp);
3283}
3284
3285static void
3286sppp_ipcp_tld(struct sppp *sp)
3287{
3288}
3289
3290static void
3291sppp_ipcp_tls(struct sppp *sp)
3292{
3293 /* indicate to LCP that it must stay alive */
3294 sp->lcp.protos |= (1 << IDX_IPCP);
3295}
3296
3297static void
3298sppp_ipcp_tlf(struct sppp *sp)
3299{
3300 /* we no longer need LCP */
3301 sp->lcp.protos &= ~(1 << IDX_IPCP);
3302 sppp_lcp_check_and_close(sp);
3303}
3304
3305static void
3306sppp_ipcp_scr(struct sppp *sp)
3307{
3308 char opt[6 /* compression */ + 6 /* address */];
3309 u_long ouraddr;
3310 int i = 0;
3311
3312 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
3313 opt[i++] = IPCP_OPT_COMPRESSION;
3314 opt[i++] = 6;
3315 opt[i++] = IPCP_COMP_VJ >> 8;
3316 opt[i++] = IPCP_COMP_VJ;
3317 opt[i++] = sp->ipcp.max_state;
3318 opt[i++] = sp->ipcp.compress_cid;
3319 }
3320 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
3321 sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
3322 opt[i++] = IPCP_OPT_ADDRESS;
3323 opt[i++] = 6;
3324 opt[i++] = ouraddr >> 24;
3325 opt[i++] = ouraddr >> 16;
3326 opt[i++] = ouraddr >> 8;
3327 opt[i++] = ouraddr;
3328 }
3329
3330 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP];
3331 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
3332}
3333#else /* !INET */
3334static void
3335sppp_ipcp_init(struct sppp *sp)
3336{
3337}
3338
3339static void
3340sppp_ipcp_up(struct sppp *sp)
3341{
3342}
3343
3344static void
3345sppp_ipcp_down(struct sppp *sp)
3346{
3347}
3348
3349static void
3350sppp_ipcp_open(struct sppp *sp)
3351{
3352}
3353
3354static void
3355sppp_ipcp_close(struct sppp *sp)
3356{
3357}
3358
3359static void
3360sppp_ipcp_TO(void *cookie)
3361{
3362}
3363
3364static int
3365sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3366{
3367 return (0);
3368}
3369
3370static void
3371sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3372{
3373}
3374
3375static void
3376sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3377{
3378}
3379
3380static void
3381sppp_ipcp_tlu(struct sppp *sp)
3382{
3383}
3384
3385static void
3386sppp_ipcp_tld(struct sppp *sp)
3387{
3388}
3389
3390static void
3391sppp_ipcp_tls(struct sppp *sp)
3392{
3393}
3394
3395static void
3396sppp_ipcp_tlf(struct sppp *sp)
3397{
3398}
3399
3400static void
3401sppp_ipcp_scr(struct sppp *sp)
3402{
3403}
3404#endif
3405
3406/*
3407 *--------------------------------------------------------------------------*
3408 * *
3409 * The IPv6CP implementation. *
3410 * *
3411 *--------------------------------------------------------------------------*
3412 */
3413
3414#ifdef INET6
3415static void
3416sppp_ipv6cp_init(struct sppp *sp)
3417{
3418 sp->ipv6cp.opts = 0;
3419 sp->ipv6cp.flags = 0;
3420 sp->state[IDX_IPV6CP] = STATE_INITIAL;
3421 sp->fail_counter[IDX_IPV6CP] = 0;
3422 sp->pp_seq[IDX_IPV6CP] = 0;
3423 sp->pp_rseq[IDX_IPV6CP] = 0;
3424 callout_init(&sp->ch[IDX_IPV6CP], CALLOUT_MPSAFE);
3425}
3426
3427static void
3428sppp_ipv6cp_up(struct sppp *sp)
3429{
3430 sppp_up_event(&ipv6cp, sp);
3431}
3432
3433static void
3434sppp_ipv6cp_down(struct sppp *sp)
3435{
3436 sppp_down_event(&ipv6cp, sp);
3437}
3438
3439static void
3440sppp_ipv6cp_open(struct sppp *sp)
3441{
3442 STDDCL;
3443 struct in6_addr myaddr, hisaddr;
3444
3445#ifdef IPV6CP_MYIFID_DYN
3446 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN);
3447#else
3448 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN;
3449#endif
3450
3451 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0);
3452 /*
3453 * If we don't have our address, this probably means our
3454 * interface doesn't want to talk IPv6 at all. (This could
3455 * be the case if somebody wants to speak only IPX, for
3456 * example.) Don't open IPv6CP in this case.
3457 */
3458 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) {
3459 /* XXX this message should go away */
3460 if (debug)
3461 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n",
3462 SPP_ARGS(ifp));
3463 return;
3464 }
3465
3466 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3467 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3468 sppp_open_event(&ipv6cp, sp);
3469}
3470
3471static void
3472sppp_ipv6cp_close(struct sppp *sp)
3473{
3474 sppp_close_event(&ipv6cp, sp);
3475}
3476
3477static void
3478sppp_ipv6cp_TO(void *cookie)
3479{
3480 sppp_to_event(&ipv6cp, (struct sppp *)cookie);
3481}
3482
3483/*
3484 * Analyze a configure request. Return true if it was agreeable, and
3485 * caused action sca, false if it has been rejected or nak'ed, and
3486 * caused action scn. (The return value is used to make the state
3487 * transition decision in the state automaton.)
3488 */
3489static int
3490sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3491{
3492 u_char *buf, *r, *p;
3493 struct ifnet *ifp = SP2IFP(sp);
3494 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
3495 struct in6_addr myaddr, desiredaddr, suggestaddr;
3496 int ifidcount;
3497 int type;
3498 int collision, nohisaddr;
3499 char ip6buf[INET6_ADDRSTRLEN];
3500
3501 len -= 4;
3502 origlen = len;
3503 /*
3504 * Make sure to allocate a buf that can at least hold a
3505 * conf-nak with an `address' option. We might need it below.
3506 */
3507 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
3508 if (! buf)
3509 return (0);
3510
3511 /* pass 1: see if we can recognize them */
3512 if (debug)
3513 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:",
3514 SPP_ARGS(ifp));
3515 p = (void*) (h+1);
3516 ifidcount = 0;
3517 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3518 len-=p[1], p+=p[1]) {
3519 if (debug)
3520 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3521 switch (*p) {
3522 case IPV6CP_OPT_IFID:
3523 if (len >= 10 && p[1] == 10 && ifidcount == 0) {
3524 /* correctly formed address option */
3525 ifidcount++;
3526 continue;
3527 }
3528 if (debug)
3529 log(-1, " [invalid]");
3530 break;
3531#ifdef notyet
3532 case IPV6CP_OPT_COMPRESSION:
3533 if (len >= 4 && p[1] >= 4) {
3534 /* correctly formed compress option */
3535 continue;
3536 }
3537 if (debug)
3538 log(-1, " [invalid]");
3539 break;
3540#endif
3541 default:
3542 /* Others not supported. */
3543 if (debug)
3544 log(-1, " [rej]");
3545 break;
3546 }
3547 /* Add the option to rejected list. */
3548 bcopy (p, r, p[1]);
3549 r += p[1];
3550 rlen += p[1];
3551 }
3552 if (rlen) {
3553 if (debug)
3554 log(-1, " send conf-rej\n");
3555 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf);
3556 goto end;
3557 } else if (debug)
3558 log(-1, "\n");
3559
3560 /* pass 2: parse option values */
3561 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
3562 if (debug)
3563 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ",
3564 SPP_ARGS(ifp));
3565 p = (void*) (h+1);
3566 len = origlen;
3567 type = CONF_ACK;
3568 for (rlen=0; len >= 2 && p[1] >= 2 && len >= p[1];
3569 len-=p[1], p+=p[1]) {
3570 if (debug)
3571 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3572 switch (*p) {
3573#ifdef notyet
3574 case IPV6CP_OPT_COMPRESSION:
3575 continue;
3576#endif
3577 case IPV6CP_OPT_IFID:
3578 bzero(&desiredaddr, sizeof(desiredaddr));
3579 bcopy(&p[2], &desiredaddr.s6_addr[8], 8);
3580 collision = (bcmp(&desiredaddr.s6_addr[8],
3581 &myaddr.s6_addr[8], 8) == 0);
3582 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr);
3583
3584 desiredaddr.s6_addr16[0] = htons(0xfe80);
3585 (void)in6_setscope(&desiredaddr, SP2IFP(sp), NULL);
3586
3587 if (!collision && !nohisaddr) {
3588 /* no collision, hisaddr known - Conf-Ack */
3589 type = CONF_ACK;
3590
3591 if (debug) {
3592 log(-1, " %s [%s]",
3593 ip6_sprintf(ip6buf, &desiredaddr),
3594 sppp_cp_type_name(type));
3595 }
3596 continue;
3597 }
3598
3599 bzero(&suggestaddr, sizeof(&suggestaddr));
3600 if (collision && nohisaddr) {
3601 /* collision, hisaddr unknown - Conf-Rej */
3602 type = CONF_REJ;
3603 bzero(&p[2], 8);
3604 } else {
3605 /*
3606 * - no collision, hisaddr unknown, or
3607 * - collision, hisaddr known
3608 * Conf-Nak, suggest hisaddr
3609 */
3610 type = CONF_NAK;
3611 sppp_suggest_ip6_addr(sp, &suggestaddr);
3612 bcopy(&suggestaddr.s6_addr[8], &p[2], 8);
3613 }
3614 if (debug)
3615 log(-1, " %s [%s]",
3616 ip6_sprintf(ip6buf, &desiredaddr),
3617 sppp_cp_type_name(type));
3618 break;
3619 }
3620 /* Add the option to nak'ed list. */
3621 bcopy (p, r, p[1]);
3622 r += p[1];
3623 rlen += p[1];
3624 }
3625
3626 if (rlen == 0 && type == CONF_ACK) {
3627 if (debug)
3628 log(-1, " send %s\n", sppp_cp_type_name(type));
3629 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1);
3630 } else {
3631#ifdef DIAGNOSTIC
3632 if (type == CONF_ACK)
3633 panic("IPv6CP RCR: CONF_ACK with non-zero rlen");
3634#endif
3635
3636 if (debug) {
3637 log(-1, " send %s suggest %s\n",
3638 sppp_cp_type_name(type),
3639 ip6_sprintf(ip6buf, &suggestaddr));
3640 }
3641 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf);
3642 }
3643
3644 end:
3645 free (buf, M_TEMP);
3646 return (rlen == 0);
3647}
3648
3649/*
3650 * Analyze the IPv6CP Configure-Reject option list, and adjust our
3651 * negotiation.
3652 */
3653static void
3654sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3655{
3656 u_char *buf, *p;
3657 struct ifnet *ifp = SP2IFP(sp);
3658 int debug = ifp->if_flags & IFF_DEBUG;
3659
3660 len -= 4;
3661 buf = malloc (len, M_TEMP, M_NOWAIT);
3662 if (!buf)
3663 return;
3664
3665 if (debug)
3666 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:",
3667 SPP_ARGS(ifp));
3668
3669 p = (void*) (h+1);
3670 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3671 len -= p[1], p += p[1]) {
3672 if (debug)
3673 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3674 switch (*p) {
3675 case IPV6CP_OPT_IFID:
3676 /*
3677 * Peer doesn't grok address option. This is
3678 * bad. XXX Should we better give up here?
3679 */
3680 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID);
3681 break;
3682#ifdef notyet
3683 case IPV6CP_OPT_COMPRESS:
3684 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS);
3685 break;
3686#endif
3687 }
3688 }
3689 if (debug)
3690 log(-1, "\n");
3691 free (buf, M_TEMP);
3692 return;
3693}
3694
3695/*
3696 * Analyze the IPv6CP Configure-NAK option list, and adjust our
3697 * negotiation.
3698 */
3699static void
3700sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3701{
3702 u_char *buf, *p;
3703 struct ifnet *ifp = SP2IFP(sp);
3704 int debug = ifp->if_flags & IFF_DEBUG;
3705 struct in6_addr suggestaddr;
3706 char ip6buf[INET6_ADDRSTRLEN];
3707
3708 len -= 4;
3709 buf = malloc (len, M_TEMP, M_NOWAIT);
3710 if (!buf)
3711 return;
3712
3713 if (debug)
3714 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:",
3715 SPP_ARGS(ifp));
3716
3717 p = (void*) (h+1);
3718 for (; len >= 2 && p[1] >= 2 && len >= p[1];
3719 len -= p[1], p += p[1]) {
3720 if (debug)
3721 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3722 switch (*p) {
3723 case IPV6CP_OPT_IFID:
3724 /*
3725 * Peer doesn't like our local ifid. See
3726 * if we can do something for him. We'll drop
3727 * him our address then.
3728 */
3729 if (len < 10 || p[1] != 10)
3730 break;
3731 bzero(&suggestaddr, sizeof(suggestaddr));
3732 suggestaddr.s6_addr16[0] = htons(0xfe80);
3733 (void)in6_setscope(&suggestaddr, SP2IFP(sp), NULL);
3734 bcopy(&p[2], &suggestaddr.s6_addr[8], 8);
3735
3736 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3737 if (debug)
3738 log(-1, " [suggestaddr %s]",
3739 ip6_sprintf(ip6buf, &suggestaddr));
3740#ifdef IPV6CP_MYIFID_DYN
3741 /*
3742 * When doing dynamic address assignment,
3743 * we accept his offer.
3744 */
3745 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) {
3746 struct in6_addr lastsuggest;
3747 /*
3748 * If <suggested myaddr from peer> equals to
3749 * <hisaddr we have suggested last time>,
3750 * we have a collision. generate new random
3751 * ifid.
3752 */
3753 sppp_suggest_ip6_addr(&lastsuggest);
3754 if (IN6_ARE_ADDR_EQUAL(&suggestaddr,
3755 lastsuggest)) {
3756 if (debug)
3757 log(-1, " [random]");
3758 sppp_gen_ip6_addr(sp, &suggestaddr);
3759 }
3760 sppp_set_ip6_addr(sp, &suggestaddr, 0);
3761 if (debug)
3762 log(-1, " [agree]");
3763 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3764 }
3765#else
3766 /*
3767 * Since we do not do dynamic address assignment,
3768 * we ignore it and thus continue to negotiate
3769 * our already existing value. This can possibly
3770 * go into infinite request-reject loop.
3771 *
3772 * This is not likely because we normally use
3773 * ifid based on MAC-address.
3774 * If you have no ethernet card on the node, too bad.
3775 * XXX should we use fail_counter?
3776 */
3777#endif
3778 break;
3779#ifdef notyet
3780 case IPV6CP_OPT_COMPRESS:
3781 /*
3782 * Peer wants different compression parameters.
3783 */
3784 break;
3785#endif
3786 }
3787 }
3788 if (debug)
3789 log(-1, "\n");
3790 free (buf, M_TEMP);
3791 return;
3792}
3793static void
3794sppp_ipv6cp_tlu(struct sppp *sp)
3795{
3796 /* we are up - notify isdn daemon */
3797 if (sp->pp_con)
3798 sp->pp_con(sp);
3799}
3800
3801static void
3802sppp_ipv6cp_tld(struct sppp *sp)
3803{
3804}
3805
3806static void
3807sppp_ipv6cp_tls(struct sppp *sp)
3808{
3809 /* indicate to LCP that it must stay alive */
3810 sp->lcp.protos |= (1 << IDX_IPV6CP);
3811}
3812
3813static void
3814sppp_ipv6cp_tlf(struct sppp *sp)
3815{
3816
3817#if 0 /* need #if 0 to close IPv6CP properly */
3818 /* we no longer need LCP */
3819 sp->lcp.protos &= ~(1 << IDX_IPV6CP);
3820 sppp_lcp_check_and_close(sp);
3821#endif
3822}
3823
3824static void
3825sppp_ipv6cp_scr(struct sppp *sp)
3826{
3827 char opt[10 /* ifid */ + 4 /* compression, minimum */];
3828 struct in6_addr ouraddr;
3829 int i = 0;
3830
3831 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) {
3832 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0);
3833 opt[i++] = IPV6CP_OPT_IFID;
3834 opt[i++] = 10;
3835 bcopy(&ouraddr.s6_addr[8], &opt[i], 8);
3836 i += 8;
3837 }
3838
3839#ifdef notyet
3840 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) {
3841 opt[i++] = IPV6CP_OPT_COMPRESSION;
3842 opt[i++] = 4;
3843 opt[i++] = 0; /* TBD */
3844 opt[i++] = 0; /* TBD */
3845 /* variable length data may follow */
3846 }
3847#endif
3848
3849 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP];
3850 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt);
3851}
3852#else /*INET6*/
3853static void sppp_ipv6cp_init(struct sppp *sp)
3854{
3855}
3856
3857static void sppp_ipv6cp_up(struct sppp *sp)
3858{
3859}
3860
3861static void sppp_ipv6cp_down(struct sppp *sp)
3862{
3863}
3864
3865
3866static void sppp_ipv6cp_open(struct sppp *sp)
3867{
3868}
3869
3870static void sppp_ipv6cp_close(struct sppp *sp)
3871{
3872}
3873
3874static void sppp_ipv6cp_TO(void *sp)
3875{
3876}
3877
3878static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3879{
3880 return 0;
3881}
3882
3883static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3884{
3885}
3886
3887static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3888{
3889}
3890
3891static void sppp_ipv6cp_tlu(struct sppp *sp)
3892{
3893}
3894
3895static void sppp_ipv6cp_tld(struct sppp *sp)
3896{
3897}
3898
3899static void sppp_ipv6cp_tls(struct sppp *sp)
3900{
3901}
3902
3903static void sppp_ipv6cp_tlf(struct sppp *sp)
3904{
3905}
3906
3907static void sppp_ipv6cp_scr(struct sppp *sp)
3908{
3909}
3910#endif /*INET6*/
3911
3912/*
3913 *--------------------------------------------------------------------------*
3914 * *
3915 * The CHAP implementation. *
3916 * *
3917 *--------------------------------------------------------------------------*
3918 */
3919
3920/*
3921 * The authentication protocols don't employ a full-fledged state machine as
3922 * the control protocols do, since they do have Open and Close events, but
3923 * not Up and Down, nor are they explicitly terminated. Also, use of the
3924 * authentication protocols may be different in both directions (this makes
3925 * sense, think of a machine that never accepts incoming calls but only
3926 * calls out, it doesn't require the called party to authenticate itself).
3927 *
3928 * Our state machine for the local authentication protocol (we are requesting
3929 * the peer to authenticate) looks like:
3930 *
3931 * RCA-
3932 * +--------------------------------------------+
3933 * V scn,tld|
3934 * +--------+ Close +---------+ RCA+
3935 * | |<----------------------------------| |------+
3936 * +--->| Closed | TO* | Opened | sca |
3937 * | | |-----+ +-------| |<-----+
3938 * | +--------+ irc | | +---------+
3939 * | ^ | | ^
3940 * | | | | |
3941 * | | | | |
3942 * | TO-| | | |
3943 * | |tld TO+ V | |
3944 * | | +------->+ | |
3945 * | | | | | |
3946 * | +--------+ V | |
3947 * | | |<----+<--------------------+ |
3948 * | | Req- | scr |
3949 * | | Sent | |
3950 * | | | |
3951 * | +--------+ |
3952 * | RCA- | | RCA+ |
3953 * +------+ +------------------------------------------+
3954 * scn,tld sca,irc,ict,tlu
3955 *
3956 *
3957 * with:
3958 *
3959 * Open: LCP reached authentication phase
3960 * Close: LCP reached terminate phase
3961 *
3962 * RCA+: received reply (pap-req, chap-response), acceptable
3963 * RCN: received reply (pap-req, chap-response), not acceptable
3964 * TO+: timeout with restart counter >= 0
3965 * TO-: timeout with restart counter < 0
3966 * TO*: reschedule timeout for CHAP
3967 *
3968 * scr: send request packet (none for PAP, chap-challenge)
3969 * sca: send ack packet (pap-ack, chap-success)
3970 * scn: send nak packet (pap-nak, chap-failure)
3971 * ict: initialize re-challenge timer (CHAP only)
3972 *
3973 * tlu: this-layer-up, LCP reaches network phase
3974 * tld: this-layer-down, LCP enters terminate phase
3975 *
3976 * Note that in CHAP mode, after sending a new challenge, while the state
3977 * automaton falls back into Req-Sent state, it doesn't signal a tld
3978 * event to LCP, so LCP remains in network phase. Only after not getting
3979 * any response (or after getting an unacceptable response), CHAP closes,
3980 * causing LCP to enter terminate phase.
3981 *
3982 * With PAP, there is no initial request that can be sent. The peer is
3983 * expected to send one based on the successful negotiation of PAP as
3984 * the authentication protocol during the LCP option negotiation.
3985 *
3986 * Incoming authentication protocol requests (remote requests
3987 * authentication, we are peer) don't employ a state machine at all,
3988 * they are simply answered. Some peers [Ascend P50 firmware rev
3989 * 4.50] react allergically when sending IPCP requests while they are
3990 * still in authentication phase (thereby violating the standard that
3991 * demands that these NCP packets are to be discarded), so we keep
3992 * track of the peer demanding us to authenticate, and only proceed to
3993 * phase network once we've seen a positive acknowledge for the
3994 * authentication.
3995 */
3996
3997/*
3998 * Handle incoming CHAP packets.
3999 */
4000static void
4001sppp_chap_input(struct sppp *sp, struct mbuf *m)
4002{
4003 STDDCL;
4004 struct lcp_header *h;
|
4028 int len, x;
| 4005 int len;
|
4029 u_char *value, *name, digest[AUTHKEYLEN], dsize;
4030 int value_len, name_len;
4031 MD5_CTX ctx;
4032
4033 len = m->m_pkthdr.len;
4034 if (len < 4) {
4035 if (debug)
4036 log(LOG_DEBUG,
4037 SPP_FMT "chap invalid packet length: %d bytes\n",
4038 SPP_ARGS(ifp), len);
4039 return;
4040 }
4041 h = mtod (m, struct lcp_header*);
4042 if (len > ntohs (h->len))
4043 len = ntohs (h->len);
4044
4045 switch (h->type) {
4046 /* challenge, failure and success are his authproto */
4047 case CHAP_CHALLENGE:
4048 value = 1 + (u_char*)(h+1);
4049 value_len = value[-1];
4050 name = value + value_len;
4051 name_len = len - value_len - 5;
4052 if (name_len < 0) {
4053 if (debug) {
4054 log(LOG_DEBUG,
4055 SPP_FMT "chap corrupted challenge "
4056 "<%s id=0x%x len=%d",
4057 SPP_ARGS(ifp),
4058 sppp_auth_type_name(PPP_CHAP, h->type),
4059 h->ident, ntohs(h->len));
4060 sppp_print_bytes((u_char*) (h+1), len-4);
4061 log(-1, ">\n");
4062 }
4063 break;
4064 }
4065
4066 if (debug) {
4067 log(LOG_DEBUG,
4068 SPP_FMT "chap input <%s id=0x%x len=%d name=",
4069 SPP_ARGS(ifp),
4070 sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
4071 ntohs(h->len));
4072 sppp_print_string((char*) name, name_len);
4073 log(-1, " value-size=%d value=", value_len);
4074 sppp_print_bytes(value, value_len);
4075 log(-1, ">\n");
4076 }
4077
4078 /* Compute reply value. */
4079 MD5Init(&ctx);
4080 MD5Update(&ctx, &h->ident, 1);
4081 MD5Update(&ctx, sp->myauth.secret,
4082 sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
4083 MD5Update(&ctx, value, value_len);
4084 MD5Final(digest, &ctx);
4085 dsize = sizeof digest;
4086
4087 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
4088 sizeof dsize, (const char *)&dsize,
4089 sizeof digest, digest,
4090 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4091 sp->myauth.name,
4092 0);
4093 break;
4094
4095 case CHAP_SUCCESS:
4096 if (debug) {
4097 log(LOG_DEBUG, SPP_FMT "chap success",
4098 SPP_ARGS(ifp));
4099 if (len > 4) {
4100 log(-1, ": ");
4101 sppp_print_string((char*)(h + 1), len - 4);
4102 }
4103 log(-1, "\n");
4104 }
| 4006 u_char *value, *name, digest[AUTHKEYLEN], dsize;
4007 int value_len, name_len;
4008 MD5_CTX ctx;
4009
4010 len = m->m_pkthdr.len;
4011 if (len < 4) {
4012 if (debug)
4013 log(LOG_DEBUG,
4014 SPP_FMT "chap invalid packet length: %d bytes\n",
4015 SPP_ARGS(ifp), len);
4016 return;
4017 }
4018 h = mtod (m, struct lcp_header*);
4019 if (len > ntohs (h->len))
4020 len = ntohs (h->len);
4021
4022 switch (h->type) {
4023 /* challenge, failure and success are his authproto */
4024 case CHAP_CHALLENGE:
4025 value = 1 + (u_char*)(h+1);
4026 value_len = value[-1];
4027 name = value + value_len;
4028 name_len = len - value_len - 5;
4029 if (name_len < 0) {
4030 if (debug) {
4031 log(LOG_DEBUG,
4032 SPP_FMT "chap corrupted challenge "
4033 "<%s id=0x%x len=%d",
4034 SPP_ARGS(ifp),
4035 sppp_auth_type_name(PPP_CHAP, h->type),
4036 h->ident, ntohs(h->len));
4037 sppp_print_bytes((u_char*) (h+1), len-4);
4038 log(-1, ">\n");
4039 }
4040 break;
4041 }
4042
4043 if (debug) {
4044 log(LOG_DEBUG,
4045 SPP_FMT "chap input <%s id=0x%x len=%d name=",
4046 SPP_ARGS(ifp),
4047 sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
4048 ntohs(h->len));
4049 sppp_print_string((char*) name, name_len);
4050 log(-1, " value-size=%d value=", value_len);
4051 sppp_print_bytes(value, value_len);
4052 log(-1, ">\n");
4053 }
4054
4055 /* Compute reply value. */
4056 MD5Init(&ctx);
4057 MD5Update(&ctx, &h->ident, 1);
4058 MD5Update(&ctx, sp->myauth.secret,
4059 sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
4060 MD5Update(&ctx, value, value_len);
4061 MD5Final(digest, &ctx);
4062 dsize = sizeof digest;
4063
4064 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
4065 sizeof dsize, (const char *)&dsize,
4066 sizeof digest, digest,
4067 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4068 sp->myauth.name,
4069 0);
4070 break;
4071
4072 case CHAP_SUCCESS:
4073 if (debug) {
4074 log(LOG_DEBUG, SPP_FMT "chap success",
4075 SPP_ARGS(ifp));
4076 if (len > 4) {
4077 log(-1, ": ");
4078 sppp_print_string((char*)(h + 1), len - 4);
4079 }
4080 log(-1, "\n");
4081 }
|
4105 x = splimp();
| |
4106 SPPP_LOCK(sp);
4107 sp->pp_flags &= ~PP_NEEDAUTH;
4108 if (sp->myauth.proto == PPP_CHAP &&
4109 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4110 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
4111 /*
4112 * We are authenticator for CHAP but didn't
4113 * complete yet. Leave it to tlu to proceed
4114 * to network phase.
4115 */
4116 SPPP_UNLOCK(sp);
| 4082 SPPP_LOCK(sp);
4083 sp->pp_flags &= ~PP_NEEDAUTH;
4084 if (sp->myauth.proto == PPP_CHAP &&
4085 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4086 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
4087 /*
4088 * We are authenticator for CHAP but didn't
4089 * complete yet. Leave it to tlu to proceed
4090 * to network phase.
4091 */
4092 SPPP_UNLOCK(sp);
|
4117 splx(x);
| |
4118 break;
4119 }
4120 SPPP_UNLOCK(sp);
| 4093 break;
4094 }
4095 SPPP_UNLOCK(sp);
|
4121 splx(x);
| |
4122 sppp_phase_network(sp);
4123 break;
4124
4125 case CHAP_FAILURE:
4126 if (debug) {
4127 log(LOG_INFO, SPP_FMT "chap failure",
4128 SPP_ARGS(ifp));
4129 if (len > 4) {
4130 log(-1, ": ");
4131 sppp_print_string((char*)(h + 1), len - 4);
4132 }
4133 log(-1, "\n");
4134 } else
4135 log(LOG_INFO, SPP_FMT "chap failure\n",
4136 SPP_ARGS(ifp));
4137 /* await LCP shutdown by authenticator */
4138 break;
4139
4140 /* response is my authproto */
4141 case CHAP_RESPONSE:
4142 value = 1 + (u_char*)(h+1);
4143 value_len = value[-1];
4144 name = value + value_len;
4145 name_len = len - value_len - 5;
4146 if (name_len < 0) {
4147 if (debug) {
4148 log(LOG_DEBUG,
4149 SPP_FMT "chap corrupted response "
4150 "<%s id=0x%x len=%d",
4151 SPP_ARGS(ifp),
4152 sppp_auth_type_name(PPP_CHAP, h->type),
4153 h->ident, ntohs(h->len));
4154 sppp_print_bytes((u_char*)(h+1), len-4);
4155 log(-1, ">\n");
4156 }
4157 break;
4158 }
4159 if (h->ident != sp->confid[IDX_CHAP]) {
4160 if (debug)
4161 log(LOG_DEBUG,
4162 SPP_FMT "chap dropping response for old ID "
4163 "(got %d, expected %d)\n",
4164 SPP_ARGS(ifp),
4165 h->ident, sp->confid[IDX_CHAP]);
4166 break;
4167 }
4168 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
4169 || bcmp(name, sp->hisauth.name, name_len) != 0) {
4170 log(LOG_INFO, SPP_FMT "chap response, his name ",
4171 SPP_ARGS(ifp));
4172 sppp_print_string(name, name_len);
4173 log(-1, " != expected ");
4174 sppp_print_string(sp->hisauth.name,
4175 sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
4176 log(-1, "\n");
4177 }
4178 if (debug) {
4179 log(LOG_DEBUG, SPP_FMT "chap input(%s) "
4180 "<%s id=0x%x len=%d name=",
4181 SPP_ARGS(ifp),
4182 sppp_state_name(sp->state[IDX_CHAP]),
4183 sppp_auth_type_name(PPP_CHAP, h->type),
4184 h->ident, ntohs (h->len));
4185 sppp_print_string((char*)name, name_len);
4186 log(-1, " value-size=%d value=", value_len);
4187 sppp_print_bytes(value, value_len);
4188 log(-1, ">\n");
4189 }
4190 if (value_len != AUTHKEYLEN) {
4191 if (debug)
4192 log(LOG_DEBUG,
4193 SPP_FMT "chap bad hash value length: "
4194 "%d bytes, should be %d\n",
4195 SPP_ARGS(ifp), value_len,
4196 AUTHKEYLEN);
4197 break;
4198 }
4199
4200 MD5Init(&ctx);
4201 MD5Update(&ctx, &h->ident, 1);
4202 MD5Update(&ctx, sp->hisauth.secret,
4203 sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
4204 MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
4205 MD5Final(digest, &ctx);
4206
4207#define FAILMSG "Failed..."
4208#define SUCCMSG "Welcome!"
4209
4210 if (value_len != sizeof digest ||
4211 bcmp(digest, value, value_len) != 0) {
4212 /* action scn, tld */
4213 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
4214 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4215 0);
4216 chap.tld(sp);
4217 break;
4218 }
4219 /* action sca, perhaps tlu */
4220 if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
4221 sp->state[IDX_CHAP] == STATE_OPENED)
4222 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
4223 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4224 0);
4225 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
4226 sppp_cp_change_state(&chap, sp, STATE_OPENED);
4227 chap.tlu(sp);
4228 }
4229 break;
4230
4231 default:
4232 /* Unknown CHAP packet type -- ignore. */
4233 if (debug) {
4234 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
4235 "<0x%x id=0x%xh len=%d",
4236 SPP_ARGS(ifp),
4237 sppp_state_name(sp->state[IDX_CHAP]),
4238 h->type, h->ident, ntohs(h->len));
4239 sppp_print_bytes((u_char*)(h+1), len-4);
4240 log(-1, ">\n");
4241 }
4242 break;
4243
4244 }
4245}
4246
4247static void
4248sppp_chap_init(struct sppp *sp)
4249{
4250 /* Chap doesn't have STATE_INITIAL at all. */
4251 sp->state[IDX_CHAP] = STATE_CLOSED;
4252 sp->fail_counter[IDX_CHAP] = 0;
4253 sp->pp_seq[IDX_CHAP] = 0;
4254 sp->pp_rseq[IDX_CHAP] = 0;
4255 callout_init(&sp->ch[IDX_CHAP], CALLOUT_MPSAFE);
4256}
4257
4258static void
4259sppp_chap_open(struct sppp *sp)
4260{
4261 if (sp->myauth.proto == PPP_CHAP &&
4262 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4263 /* we are authenticator for CHAP, start it */
4264 chap.scr(sp);
4265 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4266 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4267 }
4268 /* nothing to be done if we are peer, await a challenge */
4269}
4270
4271static void
4272sppp_chap_close(struct sppp *sp)
4273{
4274 if (sp->state[IDX_CHAP] != STATE_CLOSED)
4275 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4276}
4277
4278static void
4279sppp_chap_TO(void *cookie)
4280{
4281 struct sppp *sp = (struct sppp *)cookie;
4282 STDDCL;
| 4096 sppp_phase_network(sp);
4097 break;
4098
4099 case CHAP_FAILURE:
4100 if (debug) {
4101 log(LOG_INFO, SPP_FMT "chap failure",
4102 SPP_ARGS(ifp));
4103 if (len > 4) {
4104 log(-1, ": ");
4105 sppp_print_string((char*)(h + 1), len - 4);
4106 }
4107 log(-1, "\n");
4108 } else
4109 log(LOG_INFO, SPP_FMT "chap failure\n",
4110 SPP_ARGS(ifp));
4111 /* await LCP shutdown by authenticator */
4112 break;
4113
4114 /* response is my authproto */
4115 case CHAP_RESPONSE:
4116 value = 1 + (u_char*)(h+1);
4117 value_len = value[-1];
4118 name = value + value_len;
4119 name_len = len - value_len - 5;
4120 if (name_len < 0) {
4121 if (debug) {
4122 log(LOG_DEBUG,
4123 SPP_FMT "chap corrupted response "
4124 "<%s id=0x%x len=%d",
4125 SPP_ARGS(ifp),
4126 sppp_auth_type_name(PPP_CHAP, h->type),
4127 h->ident, ntohs(h->len));
4128 sppp_print_bytes((u_char*)(h+1), len-4);
4129 log(-1, ">\n");
4130 }
4131 break;
4132 }
4133 if (h->ident != sp->confid[IDX_CHAP]) {
4134 if (debug)
4135 log(LOG_DEBUG,
4136 SPP_FMT "chap dropping response for old ID "
4137 "(got %d, expected %d)\n",
4138 SPP_ARGS(ifp),
4139 h->ident, sp->confid[IDX_CHAP]);
4140 break;
4141 }
4142 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
4143 || bcmp(name, sp->hisauth.name, name_len) != 0) {
4144 log(LOG_INFO, SPP_FMT "chap response, his name ",
4145 SPP_ARGS(ifp));
4146 sppp_print_string(name, name_len);
4147 log(-1, " != expected ");
4148 sppp_print_string(sp->hisauth.name,
4149 sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
4150 log(-1, "\n");
4151 }
4152 if (debug) {
4153 log(LOG_DEBUG, SPP_FMT "chap input(%s) "
4154 "<%s id=0x%x len=%d name=",
4155 SPP_ARGS(ifp),
4156 sppp_state_name(sp->state[IDX_CHAP]),
4157 sppp_auth_type_name(PPP_CHAP, h->type),
4158 h->ident, ntohs (h->len));
4159 sppp_print_string((char*)name, name_len);
4160 log(-1, " value-size=%d value=", value_len);
4161 sppp_print_bytes(value, value_len);
4162 log(-1, ">\n");
4163 }
4164 if (value_len != AUTHKEYLEN) {
4165 if (debug)
4166 log(LOG_DEBUG,
4167 SPP_FMT "chap bad hash value length: "
4168 "%d bytes, should be %d\n",
4169 SPP_ARGS(ifp), value_len,
4170 AUTHKEYLEN);
4171 break;
4172 }
4173
4174 MD5Init(&ctx);
4175 MD5Update(&ctx, &h->ident, 1);
4176 MD5Update(&ctx, sp->hisauth.secret,
4177 sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
4178 MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
4179 MD5Final(digest, &ctx);
4180
4181#define FAILMSG "Failed..."
4182#define SUCCMSG "Welcome!"
4183
4184 if (value_len != sizeof digest ||
4185 bcmp(digest, value, value_len) != 0) {
4186 /* action scn, tld */
4187 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
4188 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4189 0);
4190 chap.tld(sp);
4191 break;
4192 }
4193 /* action sca, perhaps tlu */
4194 if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
4195 sp->state[IDX_CHAP] == STATE_OPENED)
4196 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
4197 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4198 0);
4199 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
4200 sppp_cp_change_state(&chap, sp, STATE_OPENED);
4201 chap.tlu(sp);
4202 }
4203 break;
4204
4205 default:
4206 /* Unknown CHAP packet type -- ignore. */
4207 if (debug) {
4208 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
4209 "<0x%x id=0x%xh len=%d",
4210 SPP_ARGS(ifp),
4211 sppp_state_name(sp->state[IDX_CHAP]),
4212 h->type, h->ident, ntohs(h->len));
4213 sppp_print_bytes((u_char*)(h+1), len-4);
4214 log(-1, ">\n");
4215 }
4216 break;
4217
4218 }
4219}
4220
4221static void
4222sppp_chap_init(struct sppp *sp)
4223{
4224 /* Chap doesn't have STATE_INITIAL at all. */
4225 sp->state[IDX_CHAP] = STATE_CLOSED;
4226 sp->fail_counter[IDX_CHAP] = 0;
4227 sp->pp_seq[IDX_CHAP] = 0;
4228 sp->pp_rseq[IDX_CHAP] = 0;
4229 callout_init(&sp->ch[IDX_CHAP], CALLOUT_MPSAFE);
4230}
4231
4232static void
4233sppp_chap_open(struct sppp *sp)
4234{
4235 if (sp->myauth.proto == PPP_CHAP &&
4236 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4237 /* we are authenticator for CHAP, start it */
4238 chap.scr(sp);
4239 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4240 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4241 }
4242 /* nothing to be done if we are peer, await a challenge */
4243}
4244
4245static void
4246sppp_chap_close(struct sppp *sp)
4247{
4248 if (sp->state[IDX_CHAP] != STATE_CLOSED)
4249 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4250}
4251
4252static void
4253sppp_chap_TO(void *cookie)
4254{
4255 struct sppp *sp = (struct sppp *)cookie;
4256 STDDCL;
|
4283 int s;
| |
4284
| 4257
|
4285 s = splimp();
| |
4286 SPPP_LOCK(sp);
4287 if (debug)
4288 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
4289 SPP_ARGS(ifp),
4290 sppp_state_name(sp->state[IDX_CHAP]),
4291 sp->rst_counter[IDX_CHAP]);
4292
4293 if (--sp->rst_counter[IDX_CHAP] < 0)
4294 /* TO- event */
4295 switch (sp->state[IDX_CHAP]) {
4296 case STATE_REQ_SENT:
4297 chap.tld(sp);
4298 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4299 break;
4300 }
4301 else
4302 /* TO+ (or TO*) event */
4303 switch (sp->state[IDX_CHAP]) {
4304 case STATE_OPENED:
4305 /* TO* event */
4306 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4307 /* FALLTHROUGH */
4308 case STATE_REQ_SENT:
4309 chap.scr(sp);
4310 /* sppp_cp_change_state() will restart the timer */
4311 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4312 break;
4313 }
4314
4315 SPPP_UNLOCK(sp);
| 4258 SPPP_LOCK(sp);
4259 if (debug)
4260 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
4261 SPP_ARGS(ifp),
4262 sppp_state_name(sp->state[IDX_CHAP]),
4263 sp->rst_counter[IDX_CHAP]);
4264
4265 if (--sp->rst_counter[IDX_CHAP] < 0)
4266 /* TO- event */
4267 switch (sp->state[IDX_CHAP]) {
4268 case STATE_REQ_SENT:
4269 chap.tld(sp);
4270 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4271 break;
4272 }
4273 else
4274 /* TO+ (or TO*) event */
4275 switch (sp->state[IDX_CHAP]) {
4276 case STATE_OPENED:
4277 /* TO* event */
4278 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4279 /* FALLTHROUGH */
4280 case STATE_REQ_SENT:
4281 chap.scr(sp);
4282 /* sppp_cp_change_state() will restart the timer */
4283 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4284 break;
4285 }
4286
4287 SPPP_UNLOCK(sp);
|
4316 splx(s);
| |
4317}
4318
4319static void
4320sppp_chap_tlu(struct sppp *sp)
4321{
4322 STDDCL;
| 4288}
4289
4290static void
4291sppp_chap_tlu(struct sppp *sp)
4292{
4293 STDDCL;
|
4323 int i, x;
| 4294 int i;
|
4324
4325 i = 0;
4326 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4327
4328 /*
4329 * Some broken CHAP implementations (Conware CoNet, firmware
4330 * 4.0.?) don't want to re-authenticate their CHAP once the
4331 * initial challenge-response exchange has taken place.
4332 * Provide for an option to avoid rechallenges.
4333 */
4334 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
4335 /*
4336 * Compute the re-challenge timeout. This will yield
4337 * a number between 300 and 810 seconds.
4338 */
4339 i = 300 + ((unsigned)(random() & 0xff00) >> 7);
4340 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, (void *)sp);
4341 }
4342
4343 if (debug) {
4344 log(LOG_DEBUG,
4345 SPP_FMT "chap %s, ",
4346 SPP_ARGS(ifp),
4347 sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
4348 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
4349 log(-1, "next re-challenge in %d seconds\n", i);
4350 else
4351 log(-1, "re-challenging supressed\n");
4352 }
4353
| 4295
4296 i = 0;
4297 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4298
4299 /*
4300 * Some broken CHAP implementations (Conware CoNet, firmware
4301 * 4.0.?) don't want to re-authenticate their CHAP once the
4302 * initial challenge-response exchange has taken place.
4303 * Provide for an option to avoid rechallenges.
4304 */
4305 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
4306 /*
4307 * Compute the re-challenge timeout. This will yield
4308 * a number between 300 and 810 seconds.
4309 */
4310 i = 300 + ((unsigned)(random() & 0xff00) >> 7);
4311 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, (void *)sp);
4312 }
4313
4314 if (debug) {
4315 log(LOG_DEBUG,
4316 SPP_FMT "chap %s, ",
4317 SPP_ARGS(ifp),
4318 sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
4319 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
4320 log(-1, "next re-challenge in %d seconds\n", i);
4321 else
4322 log(-1, "re-challenging supressed\n");
4323 }
4324
|
4354 x = splimp();
| |
4355 SPPP_LOCK(sp);
4356 /* indicate to LCP that we need to be closed down */
4357 sp->lcp.protos |= (1 << IDX_CHAP);
4358
4359 if (sp->pp_flags & PP_NEEDAUTH) {
4360 /*
4361 * Remote is authenticator, but his auth proto didn't
4362 * complete yet. Defer the transition to network
4363 * phase.
4364 */
4365 SPPP_UNLOCK(sp);
| 4325 SPPP_LOCK(sp);
4326 /* indicate to LCP that we need to be closed down */
4327 sp->lcp.protos |= (1 << IDX_CHAP);
4328
4329 if (sp->pp_flags & PP_NEEDAUTH) {
4330 /*
4331 * Remote is authenticator, but his auth proto didn't
4332 * complete yet. Defer the transition to network
4333 * phase.
4334 */
4335 SPPP_UNLOCK(sp);
|
4366 splx(x);
| |
4367 return;
4368 }
4369 SPPP_UNLOCK(sp);
| 4336 return;
4337 }
4338 SPPP_UNLOCK(sp);
|
4370 splx(x);
| |
4371
4372 /*
4373 * If we are already in phase network, we are done here. This
4374 * is the case if this is a dummy tlu event after a re-challenge.
4375 */
4376 if (sp->pp_phase != PHASE_NETWORK)
4377 sppp_phase_network(sp);
4378}
4379
4380static void
4381sppp_chap_tld(struct sppp *sp)
4382{
4383 STDDCL;
4384
4385 if (debug)
4386 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
4387 callout_stop(&sp->ch[IDX_CHAP]);
4388 sp->lcp.protos &= ~(1 << IDX_CHAP);
4389
4390 lcp.Close(sp);
4391}
4392
4393static void
4394sppp_chap_scr(struct sppp *sp)
4395{
4396 u_long *ch, seed;
4397 u_char clen;
4398
4399 /* Compute random challenge. */
4400 ch = (u_long *)sp->myauth.challenge;
4401 read_random(&seed, sizeof seed);
4402 ch[0] = seed ^ random();
4403 ch[1] = seed ^ random();
4404 ch[2] = seed ^ random();
4405 ch[3] = seed ^ random();
4406 clen = AUTHKEYLEN;
4407
4408 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP];
4409
4410 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
4411 sizeof clen, (const char *)&clen,
4412 (size_t)AUTHKEYLEN, sp->myauth.challenge,
4413 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4414 sp->myauth.name,
4415 0);
4416}
4417
4418/*
4419 *--------------------------------------------------------------------------*
4420 * *
4421 * The PAP implementation. *
4422 * *
4423 *--------------------------------------------------------------------------*
4424 */
4425/*
4426 * For PAP, we need to keep a little state also if we are the peer, not the
4427 * authenticator. This is since we don't get a request to authenticate, but
4428 * have to repeatedly authenticate ourself until we got a response (or the
4429 * retry counter is expired).
4430 */
4431
4432/*
4433 * Handle incoming PAP packets. */
4434static void
4435sppp_pap_input(struct sppp *sp, struct mbuf *m)
4436{
4437 STDDCL;
4438 struct lcp_header *h;
| 4339
4340 /*
4341 * If we are already in phase network, we are done here. This
4342 * is the case if this is a dummy tlu event after a re-challenge.
4343 */
4344 if (sp->pp_phase != PHASE_NETWORK)
4345 sppp_phase_network(sp);
4346}
4347
4348static void
4349sppp_chap_tld(struct sppp *sp)
4350{
4351 STDDCL;
4352
4353 if (debug)
4354 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
4355 callout_stop(&sp->ch[IDX_CHAP]);
4356 sp->lcp.protos &= ~(1 << IDX_CHAP);
4357
4358 lcp.Close(sp);
4359}
4360
4361static void
4362sppp_chap_scr(struct sppp *sp)
4363{
4364 u_long *ch, seed;
4365 u_char clen;
4366
4367 /* Compute random challenge. */
4368 ch = (u_long *)sp->myauth.challenge;
4369 read_random(&seed, sizeof seed);
4370 ch[0] = seed ^ random();
4371 ch[1] = seed ^ random();
4372 ch[2] = seed ^ random();
4373 ch[3] = seed ^ random();
4374 clen = AUTHKEYLEN;
4375
4376 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP];
4377
4378 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
4379 sizeof clen, (const char *)&clen,
4380 (size_t)AUTHKEYLEN, sp->myauth.challenge,
4381 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4382 sp->myauth.name,
4383 0);
4384}
4385
4386/*
4387 *--------------------------------------------------------------------------*
4388 * *
4389 * The PAP implementation. *
4390 * *
4391 *--------------------------------------------------------------------------*
4392 */
4393/*
4394 * For PAP, we need to keep a little state also if we are the peer, not the
4395 * authenticator. This is since we don't get a request to authenticate, but
4396 * have to repeatedly authenticate ourself until we got a response (or the
4397 * retry counter is expired).
4398 */
4399
4400/*
4401 * Handle incoming PAP packets. */
4402static void
4403sppp_pap_input(struct sppp *sp, struct mbuf *m)
4404{
4405 STDDCL;
4406 struct lcp_header *h;
|
4439 int len, x;
| 4407 int len;
|
4440 u_char *name, *passwd, mlen;
4441 int name_len, passwd_len;
4442
4443 len = m->m_pkthdr.len;
4444 if (len < 5) {
4445 if (debug)
4446 log(LOG_DEBUG,
4447 SPP_FMT "pap invalid packet length: %d bytes\n",
4448 SPP_ARGS(ifp), len);
4449 return;
4450 }
4451 h = mtod (m, struct lcp_header*);
4452 if (len > ntohs (h->len))
4453 len = ntohs (h->len);
4454 switch (h->type) {
4455 /* PAP request is my authproto */
4456 case PAP_REQ:
4457 name = 1 + (u_char*)(h+1);
4458 name_len = name[-1];
4459 passwd = name + name_len + 1;
4460 if (name_len > len - 6 ||
4461 (passwd_len = passwd[-1]) > len - 6 - name_len) {
4462 if (debug) {
4463 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4464 "<%s id=0x%x len=%d",
4465 SPP_ARGS(ifp),
4466 sppp_auth_type_name(PPP_PAP, h->type),
4467 h->ident, ntohs(h->len));
4468 sppp_print_bytes((u_char*)(h+1), len-4);
4469 log(-1, ">\n");
4470 }
4471 break;
4472 }
4473 if (debug) {
4474 log(LOG_DEBUG, SPP_FMT "pap input(%s) "
4475 "<%s id=0x%x len=%d name=",
4476 SPP_ARGS(ifp),
4477 sppp_state_name(sp->state[IDX_PAP]),
4478 sppp_auth_type_name(PPP_PAP, h->type),
4479 h->ident, ntohs(h->len));
4480 sppp_print_string((char*)name, name_len);
4481 log(-1, " passwd=");
4482 sppp_print_string((char*)passwd, passwd_len);
4483 log(-1, ">\n");
4484 }
4485 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) ||
4486 passwd_len != sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN) ||
4487 bcmp(name, sp->hisauth.name, name_len) != 0 ||
4488 bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
4489 /* action scn, tld */
4490 mlen = sizeof(FAILMSG) - 1;
4491 sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
4492 sizeof mlen, (const char *)&mlen,
4493 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4494 0);
4495 pap.tld(sp);
4496 break;
4497 }
4498 /* action sca, perhaps tlu */
4499 if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
4500 sp->state[IDX_PAP] == STATE_OPENED) {
4501 mlen = sizeof(SUCCMSG) - 1;
4502 sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
4503 sizeof mlen, (const char *)&mlen,
4504 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4505 0);
4506 }
4507 if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
4508 sppp_cp_change_state(&pap, sp, STATE_OPENED);
4509 pap.tlu(sp);
4510 }
4511 break;
4512
4513 /* ack and nak are his authproto */
4514 case PAP_ACK:
4515 callout_stop(&sp->pap_my_to_ch);
4516 if (debug) {
4517 log(LOG_DEBUG, SPP_FMT "pap success",
4518 SPP_ARGS(ifp));
4519 name_len = *((char *)h);
4520 if (len > 5 && name_len) {
4521 log(-1, ": ");
4522 sppp_print_string((char*)(h+1), name_len);
4523 }
4524 log(-1, "\n");
4525 }
| 4408 u_char *name, *passwd, mlen;
4409 int name_len, passwd_len;
4410
4411 len = m->m_pkthdr.len;
4412 if (len < 5) {
4413 if (debug)
4414 log(LOG_DEBUG,
4415 SPP_FMT "pap invalid packet length: %d bytes\n",
4416 SPP_ARGS(ifp), len);
4417 return;
4418 }
4419 h = mtod (m, struct lcp_header*);
4420 if (len > ntohs (h->len))
4421 len = ntohs (h->len);
4422 switch (h->type) {
4423 /* PAP request is my authproto */
4424 case PAP_REQ:
4425 name = 1 + (u_char*)(h+1);
4426 name_len = name[-1];
4427 passwd = name + name_len + 1;
4428 if (name_len > len - 6 ||
4429 (passwd_len = passwd[-1]) > len - 6 - name_len) {
4430 if (debug) {
4431 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4432 "<%s id=0x%x len=%d",
4433 SPP_ARGS(ifp),
4434 sppp_auth_type_name(PPP_PAP, h->type),
4435 h->ident, ntohs(h->len));
4436 sppp_print_bytes((u_char*)(h+1), len-4);
4437 log(-1, ">\n");
4438 }
4439 break;
4440 }
4441 if (debug) {
4442 log(LOG_DEBUG, SPP_FMT "pap input(%s) "
4443 "<%s id=0x%x len=%d name=",
4444 SPP_ARGS(ifp),
4445 sppp_state_name(sp->state[IDX_PAP]),
4446 sppp_auth_type_name(PPP_PAP, h->type),
4447 h->ident, ntohs(h->len));
4448 sppp_print_string((char*)name, name_len);
4449 log(-1, " passwd=");
4450 sppp_print_string((char*)passwd, passwd_len);
4451 log(-1, ">\n");
4452 }
4453 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) ||
4454 passwd_len != sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN) ||
4455 bcmp(name, sp->hisauth.name, name_len) != 0 ||
4456 bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
4457 /* action scn, tld */
4458 mlen = sizeof(FAILMSG) - 1;
4459 sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
4460 sizeof mlen, (const char *)&mlen,
4461 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4462 0);
4463 pap.tld(sp);
4464 break;
4465 }
4466 /* action sca, perhaps tlu */
4467 if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
4468 sp->state[IDX_PAP] == STATE_OPENED) {
4469 mlen = sizeof(SUCCMSG) - 1;
4470 sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
4471 sizeof mlen, (const char *)&mlen,
4472 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4473 0);
4474 }
4475 if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
4476 sppp_cp_change_state(&pap, sp, STATE_OPENED);
4477 pap.tlu(sp);
4478 }
4479 break;
4480
4481 /* ack and nak are his authproto */
4482 case PAP_ACK:
4483 callout_stop(&sp->pap_my_to_ch);
4484 if (debug) {
4485 log(LOG_DEBUG, SPP_FMT "pap success",
4486 SPP_ARGS(ifp));
4487 name_len = *((char *)h);
4488 if (len > 5 && name_len) {
4489 log(-1, ": ");
4490 sppp_print_string((char*)(h+1), name_len);
4491 }
4492 log(-1, "\n");
4493 }
|
4526 x = splimp();
| |
4527 SPPP_LOCK(sp);
4528 sp->pp_flags &= ~PP_NEEDAUTH;
4529 if (sp->myauth.proto == PPP_PAP &&
4530 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4531 (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
4532 /*
4533 * We are authenticator for PAP but didn't
4534 * complete yet. Leave it to tlu to proceed
4535 * to network phase.
4536 */
4537 SPPP_UNLOCK(sp);
| 4494 SPPP_LOCK(sp);
4495 sp->pp_flags &= ~PP_NEEDAUTH;
4496 if (sp->myauth.proto == PPP_PAP &&
4497 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4498 (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
4499 /*
4500 * We are authenticator for PAP but didn't
4501 * complete yet. Leave it to tlu to proceed
4502 * to network phase.
4503 */
4504 SPPP_UNLOCK(sp);
|
4538 splx(x);
| |
4539 break;
4540 }
4541 SPPP_UNLOCK(sp);
| 4505 break;
4506 }
4507 SPPP_UNLOCK(sp);
|
4542 splx(x);
| |
4543 sppp_phase_network(sp);
4544 break;
4545
4546 case PAP_NAK:
4547 callout_stop (&sp->pap_my_to_ch);
4548 if (debug) {
4549 log(LOG_INFO, SPP_FMT "pap failure",
4550 SPP_ARGS(ifp));
4551 name_len = *((char *)h);
4552 if (len > 5 && name_len) {
4553 log(-1, ": ");
4554 sppp_print_string((char*)(h+1), name_len);
4555 }
4556 log(-1, "\n");
4557 } else
4558 log(LOG_INFO, SPP_FMT "pap failure\n",
4559 SPP_ARGS(ifp));
4560 /* await LCP shutdown by authenticator */
4561 break;
4562
4563 default:
4564 /* Unknown PAP packet type -- ignore. */
4565 if (debug) {
4566 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4567 "<0x%x id=0x%x len=%d",
4568 SPP_ARGS(ifp),
4569 h->type, h->ident, ntohs(h->len));
4570 sppp_print_bytes((u_char*)(h+1), len-4);
4571 log(-1, ">\n");
4572 }
4573 break;
4574
4575 }
4576}
4577
4578static void
4579sppp_pap_init(struct sppp *sp)
4580{
4581 /* PAP doesn't have STATE_INITIAL at all. */
4582 sp->state[IDX_PAP] = STATE_CLOSED;
4583 sp->fail_counter[IDX_PAP] = 0;
4584 sp->pp_seq[IDX_PAP] = 0;
4585 sp->pp_rseq[IDX_PAP] = 0;
4586 callout_init(&sp->ch[IDX_PAP], CALLOUT_MPSAFE);
4587 callout_init(&sp->pap_my_to_ch, CALLOUT_MPSAFE);
4588}
4589
4590static void
4591sppp_pap_open(struct sppp *sp)
4592{
4593 if (sp->hisauth.proto == PPP_PAP &&
4594 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4595 /* we are authenticator for PAP, start our timer */
4596 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4597 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4598 }
4599 if (sp->myauth.proto == PPP_PAP) {
4600 /* we are peer, send a request, and start a timer */
4601 pap.scr(sp);
4602 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout,
4603 sppp_pap_my_TO, (void *)sp);
4604 }
4605}
4606
4607static void
4608sppp_pap_close(struct sppp *sp)
4609{
4610 if (sp->state[IDX_PAP] != STATE_CLOSED)
4611 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4612}
4613
4614/*
4615 * That's the timeout routine if we are authenticator. Since the
4616 * authenticator is basically passive in PAP, we can't do much here.
4617 */
4618static void
4619sppp_pap_TO(void *cookie)
4620{
4621 struct sppp *sp = (struct sppp *)cookie;
4622 STDDCL;
| 4508 sppp_phase_network(sp);
4509 break;
4510
4511 case PAP_NAK:
4512 callout_stop (&sp->pap_my_to_ch);
4513 if (debug) {
4514 log(LOG_INFO, SPP_FMT "pap failure",
4515 SPP_ARGS(ifp));
4516 name_len = *((char *)h);
4517 if (len > 5 && name_len) {
4518 log(-1, ": ");
4519 sppp_print_string((char*)(h+1), name_len);
4520 }
4521 log(-1, "\n");
4522 } else
4523 log(LOG_INFO, SPP_FMT "pap failure\n",
4524 SPP_ARGS(ifp));
4525 /* await LCP shutdown by authenticator */
4526 break;
4527
4528 default:
4529 /* Unknown PAP packet type -- ignore. */
4530 if (debug) {
4531 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4532 "<0x%x id=0x%x len=%d",
4533 SPP_ARGS(ifp),
4534 h->type, h->ident, ntohs(h->len));
4535 sppp_print_bytes((u_char*)(h+1), len-4);
4536 log(-1, ">\n");
4537 }
4538 break;
4539
4540 }
4541}
4542
4543static void
4544sppp_pap_init(struct sppp *sp)
4545{
4546 /* PAP doesn't have STATE_INITIAL at all. */
4547 sp->state[IDX_PAP] = STATE_CLOSED;
4548 sp->fail_counter[IDX_PAP] = 0;
4549 sp->pp_seq[IDX_PAP] = 0;
4550 sp->pp_rseq[IDX_PAP] = 0;
4551 callout_init(&sp->ch[IDX_PAP], CALLOUT_MPSAFE);
4552 callout_init(&sp->pap_my_to_ch, CALLOUT_MPSAFE);
4553}
4554
4555static void
4556sppp_pap_open(struct sppp *sp)
4557{
4558 if (sp->hisauth.proto == PPP_PAP &&
4559 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4560 /* we are authenticator for PAP, start our timer */
4561 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4562 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4563 }
4564 if (sp->myauth.proto == PPP_PAP) {
4565 /* we are peer, send a request, and start a timer */
4566 pap.scr(sp);
4567 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout,
4568 sppp_pap_my_TO, (void *)sp);
4569 }
4570}
4571
4572static void
4573sppp_pap_close(struct sppp *sp)
4574{
4575 if (sp->state[IDX_PAP] != STATE_CLOSED)
4576 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4577}
4578
4579/*
4580 * That's the timeout routine if we are authenticator. Since the
4581 * authenticator is basically passive in PAP, we can't do much here.
4582 */
4583static void
4584sppp_pap_TO(void *cookie)
4585{
4586 struct sppp *sp = (struct sppp *)cookie;
4587 STDDCL;
|
4623 int s;
| |
4624
| 4588
|
4625 s = splimp();
| |
4626 SPPP_LOCK(sp);
4627 if (debug)
4628 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
4629 SPP_ARGS(ifp),
4630 sppp_state_name(sp->state[IDX_PAP]),
4631 sp->rst_counter[IDX_PAP]);
4632
4633 if (--sp->rst_counter[IDX_PAP] < 0)
4634 /* TO- event */
4635 switch (sp->state[IDX_PAP]) {
4636 case STATE_REQ_SENT:
4637 pap.tld(sp);
4638 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4639 break;
4640 }
4641 else
4642 /* TO+ event, not very much we could do */
4643 switch (sp->state[IDX_PAP]) {
4644 case STATE_REQ_SENT:
4645 /* sppp_cp_change_state() will restart the timer */
4646 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4647 break;
4648 }
4649
4650 SPPP_UNLOCK(sp);
| 4589 SPPP_LOCK(sp);
4590 if (debug)
4591 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
4592 SPP_ARGS(ifp),
4593 sppp_state_name(sp->state[IDX_PAP]),
4594 sp->rst_counter[IDX_PAP]);
4595
4596 if (--sp->rst_counter[IDX_PAP] < 0)
4597 /* TO- event */
4598 switch (sp->state[IDX_PAP]) {
4599 case STATE_REQ_SENT:
4600 pap.tld(sp);
4601 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4602 break;
4603 }
4604 else
4605 /* TO+ event, not very much we could do */
4606 switch (sp->state[IDX_PAP]) {
4607 case STATE_REQ_SENT:
4608 /* sppp_cp_change_state() will restart the timer */
4609 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4610 break;
4611 }
4612
4613 SPPP_UNLOCK(sp);
|
4651 splx(s);
| |
4652}
4653
4654/*
4655 * That's the timeout handler if we are peer. Since the peer is active,
4656 * we need to retransmit our PAP request since it is apparently lost.
4657 * XXX We should impose a max counter.
4658 */
4659static void
4660sppp_pap_my_TO(void *cookie)
4661{
4662 struct sppp *sp = (struct sppp *)cookie;
4663 STDDCL;
4664
4665 if (debug)
4666 log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
4667 SPP_ARGS(ifp));
4668
4669 SPPP_LOCK(sp);
4670 pap.scr(sp);
4671 SPPP_UNLOCK(sp);
4672}
4673
4674static void
4675sppp_pap_tlu(struct sppp *sp)
4676{
4677 STDDCL;
| 4614}
4615
4616/*
4617 * That's the timeout handler if we are peer. Since the peer is active,
4618 * we need to retransmit our PAP request since it is apparently lost.
4619 * XXX We should impose a max counter.
4620 */
4621static void
4622sppp_pap_my_TO(void *cookie)
4623{
4624 struct sppp *sp = (struct sppp *)cookie;
4625 STDDCL;
4626
4627 if (debug)
4628 log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
4629 SPP_ARGS(ifp));
4630
4631 SPPP_LOCK(sp);
4632 pap.scr(sp);
4633 SPPP_UNLOCK(sp);
4634}
4635
4636static void
4637sppp_pap_tlu(struct sppp *sp)
4638{
4639 STDDCL;
|
4678 int x;
| |
4679
4680 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4681
4682 if (debug)
4683 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
4684 SPP_ARGS(ifp), pap.name);
4685
| 4640
4641 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4642
4643 if (debug)
4644 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
4645 SPP_ARGS(ifp), pap.name);
4646
|
4686 x = splimp();
| |
4687 SPPP_LOCK(sp);
4688 /* indicate to LCP that we need to be closed down */
4689 sp->lcp.protos |= (1 << IDX_PAP);
4690
4691 if (sp->pp_flags & PP_NEEDAUTH) {
4692 /*
4693 * Remote is authenticator, but his auth proto didn't
4694 * complete yet. Defer the transition to network
4695 * phase.
4696 */
4697 SPPP_UNLOCK(sp);
| 4647 SPPP_LOCK(sp);
4648 /* indicate to LCP that we need to be closed down */
4649 sp->lcp.protos |= (1 << IDX_PAP);
4650
4651 if (sp->pp_flags & PP_NEEDAUTH) {
4652 /*
4653 * Remote is authenticator, but his auth proto didn't
4654 * complete yet. Defer the transition to network
4655 * phase.
4656 */
4657 SPPP_UNLOCK(sp);
|
4698 splx(x);
| |
4699 return;
4700 }
4701 SPPP_UNLOCK(sp);
| 4658 return;
4659 }
4660 SPPP_UNLOCK(sp);
|
4702 splx(x);
| |
4703 sppp_phase_network(sp);
4704}
4705
4706static void
4707sppp_pap_tld(struct sppp *sp)
4708{
4709 STDDCL;
4710
4711 if (debug)
4712 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
4713 callout_stop (&sp->ch[IDX_PAP]);
4714 callout_stop (&sp->pap_my_to_ch);
4715 sp->lcp.protos &= ~(1 << IDX_PAP);
4716
4717 lcp.Close(sp);
4718}
4719
4720static void
4721sppp_pap_scr(struct sppp *sp)
4722{
4723 u_char idlen, pwdlen;
4724
4725 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP];
4726 pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
4727 idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
4728
4729 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
4730 sizeof idlen, (const char *)&idlen,
4731 (size_t)idlen, sp->myauth.name,
4732 sizeof pwdlen, (const char *)&pwdlen,
4733 (size_t)pwdlen, sp->myauth.secret,
4734 0);
4735}
4736
4737/*
4738 * Random miscellaneous functions.
4739 */
4740
4741/*
4742 * Send a PAP or CHAP proto packet.
4743 *
4744 * Varadic function, each of the elements for the ellipsis is of type
4745 * ``size_t mlen, const u_char *msg''. Processing will stop iff
4746 * mlen == 0.
4747 * NOTE: never declare variadic functions with types subject to type
4748 * promotion (i.e. u_char). This is asking for big trouble depending
4749 * on the architecture you are on...
4750 */
4751
4752static void
4753sppp_auth_send(const struct cp *cp, struct sppp *sp,
4754 unsigned int type, unsigned int id,
4755 ...)
4756{
4757 STDDCL;
4758 struct ppp_header *h;
4759 struct lcp_header *lh;
4760 struct mbuf *m;
4761 u_char *p;
4762 int len;
4763 unsigned int mlen;
4764 const char *msg;
4765 va_list ap;
4766
4767 MGETHDR (m, M_DONTWAIT, MT_DATA);
4768 if (! m)
4769 return;
4770 m->m_pkthdr.rcvif = 0;
4771
4772 h = mtod (m, struct ppp_header*);
4773 h->address = PPP_ALLSTATIONS; /* broadcast address */
4774 h->control = PPP_UI; /* Unnumbered Info */
4775 h->protocol = htons(cp->proto);
4776
4777 lh = (struct lcp_header*)(h + 1);
4778 lh->type = type;
4779 lh->ident = id;
4780 p = (u_char*) (lh+1);
4781
4782 va_start(ap, id);
4783 len = 0;
4784
4785 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) {
4786 msg = va_arg(ap, const char *);
4787 len += mlen;
4788 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
4789 va_end(ap);
4790 m_freem(m);
4791 return;
4792 }
4793
4794 bcopy(msg, p, mlen);
4795 p += mlen;
4796 }
4797 va_end(ap);
4798
4799 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
4800 lh->len = htons (LCP_HEADER_LEN + len);
4801
4802 if (debug) {
4803 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
4804 SPP_ARGS(ifp), cp->name,
4805 sppp_auth_type_name(cp->proto, lh->type),
4806 lh->ident, ntohs(lh->len));
4807 sppp_print_bytes((u_char*) (lh+1), len);
4808 log(-1, ">\n");
4809 }
4810 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
4811 ifp->if_oerrors++;
4812}
4813
4814/*
4815 * Flush interface queue.
4816 */
4817static void
4818sppp_qflush(struct ifqueue *ifq)
4819{
4820 struct mbuf *m, *n;
4821
4822 n = ifq->ifq_head;
4823 while ((m = n)) {
4824 n = m->m_act;
4825 m_freem (m);
4826 }
4827 ifq->ifq_head = 0;
4828 ifq->ifq_tail = 0;
4829 ifq->ifq_len = 0;
4830}
4831
4832/*
4833 * Send keepalive packets, every 10 seconds.
4834 */
4835static void
4836sppp_keepalive(void *dummy)
4837{
4838 struct sppp *sp = (struct sppp*)dummy;
4839 struct ifnet *ifp = SP2IFP(sp);
| 4661 sppp_phase_network(sp);
4662}
4663
4664static void
4665sppp_pap_tld(struct sppp *sp)
4666{
4667 STDDCL;
4668
4669 if (debug)
4670 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
4671 callout_stop (&sp->ch[IDX_PAP]);
4672 callout_stop (&sp->pap_my_to_ch);
4673 sp->lcp.protos &= ~(1 << IDX_PAP);
4674
4675 lcp.Close(sp);
4676}
4677
4678static void
4679sppp_pap_scr(struct sppp *sp)
4680{
4681 u_char idlen, pwdlen;
4682
4683 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP];
4684 pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
4685 idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
4686
4687 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
4688 sizeof idlen, (const char *)&idlen,
4689 (size_t)idlen, sp->myauth.name,
4690 sizeof pwdlen, (const char *)&pwdlen,
4691 (size_t)pwdlen, sp->myauth.secret,
4692 0);
4693}
4694
4695/*
4696 * Random miscellaneous functions.
4697 */
4698
4699/*
4700 * Send a PAP or CHAP proto packet.
4701 *
4702 * Varadic function, each of the elements for the ellipsis is of type
4703 * ``size_t mlen, const u_char *msg''. Processing will stop iff
4704 * mlen == 0.
4705 * NOTE: never declare variadic functions with types subject to type
4706 * promotion (i.e. u_char). This is asking for big trouble depending
4707 * on the architecture you are on...
4708 */
4709
4710static void
4711sppp_auth_send(const struct cp *cp, struct sppp *sp,
4712 unsigned int type, unsigned int id,
4713 ...)
4714{
4715 STDDCL;
4716 struct ppp_header *h;
4717 struct lcp_header *lh;
4718 struct mbuf *m;
4719 u_char *p;
4720 int len;
4721 unsigned int mlen;
4722 const char *msg;
4723 va_list ap;
4724
4725 MGETHDR (m, M_DONTWAIT, MT_DATA);
4726 if (! m)
4727 return;
4728 m->m_pkthdr.rcvif = 0;
4729
4730 h = mtod (m, struct ppp_header*);
4731 h->address = PPP_ALLSTATIONS; /* broadcast address */
4732 h->control = PPP_UI; /* Unnumbered Info */
4733 h->protocol = htons(cp->proto);
4734
4735 lh = (struct lcp_header*)(h + 1);
4736 lh->type = type;
4737 lh->ident = id;
4738 p = (u_char*) (lh+1);
4739
4740 va_start(ap, id);
4741 len = 0;
4742
4743 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) {
4744 msg = va_arg(ap, const char *);
4745 len += mlen;
4746 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
4747 va_end(ap);
4748 m_freem(m);
4749 return;
4750 }
4751
4752 bcopy(msg, p, mlen);
4753 p += mlen;
4754 }
4755 va_end(ap);
4756
4757 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
4758 lh->len = htons (LCP_HEADER_LEN + len);
4759
4760 if (debug) {
4761 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
4762 SPP_ARGS(ifp), cp->name,
4763 sppp_auth_type_name(cp->proto, lh->type),
4764 lh->ident, ntohs(lh->len));
4765 sppp_print_bytes((u_char*) (lh+1), len);
4766 log(-1, ">\n");
4767 }
4768 if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3))
4769 ifp->if_oerrors++;
4770}
4771
4772/*
4773 * Flush interface queue.
4774 */
4775static void
4776sppp_qflush(struct ifqueue *ifq)
4777{
4778 struct mbuf *m, *n;
4779
4780 n = ifq->ifq_head;
4781 while ((m = n)) {
4782 n = m->m_act;
4783 m_freem (m);
4784 }
4785 ifq->ifq_head = 0;
4786 ifq->ifq_tail = 0;
4787 ifq->ifq_len = 0;
4788}
4789
4790/*
4791 * Send keepalive packets, every 10 seconds.
4792 */
4793static void
4794sppp_keepalive(void *dummy)
4795{
4796 struct sppp *sp = (struct sppp*)dummy;
4797 struct ifnet *ifp = SP2IFP(sp);
|
4840 int s;
| |
4841
| 4798
|
4842 s = splimp();
| |
4843 SPPP_LOCK(sp);
4844 /* Keepalive mode disabled or channel down? */
4845 if (! (sp->pp_flags & PP_KEEPALIVE) ||
4846 ! (ifp->if_drv_flags & IFF_DRV_RUNNING))
4847 goto out;
4848
4849 if (sp->pp_mode == PP_FR) {
4850 sppp_fr_keepalive (sp);
4851 goto out;
4852 }
4853
4854 /* No keepalive in PPP mode if LCP not opened yet. */
4855 if (sp->pp_mode != IFF_CISCO &&
4856 sp->pp_phase < PHASE_AUTHENTICATE)
4857 goto out;
4858
4859 if (sp->pp_alivecnt == MAXALIVECNT) {
4860 /* No keepalive packets got. Stop the interface. */
4861 printf (SPP_FMT "down\n", SPP_ARGS(ifp));
4862 if_down (ifp);
4863 sppp_qflush (&sp->pp_cpq);
4864 if (sp->pp_mode != IFF_CISCO) {
4865 /* XXX */
4866 /* Shut down the PPP link. */
4867 lcp.Down(sp);
4868 /* Initiate negotiation. XXX */
4869 lcp.Up(sp);
4870 }
4871 }
4872 if (sp->pp_alivecnt <= MAXALIVECNT)
4873 ++sp->pp_alivecnt;
4874 if (sp->pp_mode == IFF_CISCO)
4875 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ,
4876 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]);
4877 else if (sp->pp_phase >= PHASE_AUTHENTICATE) {
4878 long nmagic = htonl (sp->lcp.magic);
4879 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP];
4880 sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
4881 sp->lcp.echoid, 4, &nmagic);
4882 }
4883out:
4884 SPPP_UNLOCK(sp);
| 4799 SPPP_LOCK(sp);
4800 /* Keepalive mode disabled or channel down? */
4801 if (! (sp->pp_flags & PP_KEEPALIVE) ||
4802 ! (ifp->if_drv_flags & IFF_DRV_RUNNING))
4803 goto out;
4804
4805 if (sp->pp_mode == PP_FR) {
4806 sppp_fr_keepalive (sp);
4807 goto out;
4808 }
4809
4810 /* No keepalive in PPP mode if LCP not opened yet. */
4811 if (sp->pp_mode != IFF_CISCO &&
4812 sp->pp_phase < PHASE_AUTHENTICATE)
4813 goto out;
4814
4815 if (sp->pp_alivecnt == MAXALIVECNT) {
4816 /* No keepalive packets got. Stop the interface. */
4817 printf (SPP_FMT "down\n", SPP_ARGS(ifp));
4818 if_down (ifp);
4819 sppp_qflush (&sp->pp_cpq);
4820 if (sp->pp_mode != IFF_CISCO) {
4821 /* XXX */
4822 /* Shut down the PPP link. */
4823 lcp.Down(sp);
4824 /* Initiate negotiation. XXX */
4825 lcp.Up(sp);
4826 }
4827 }
4828 if (sp->pp_alivecnt <= MAXALIVECNT)
4829 ++sp->pp_alivecnt;
4830 if (sp->pp_mode == IFF_CISCO)
4831 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ,
4832 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]);
4833 else if (sp->pp_phase >= PHASE_AUTHENTICATE) {
4834 long nmagic = htonl (sp->lcp.magic);
4835 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP];
4836 sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
4837 sp->lcp.echoid, 4, &nmagic);
4838 }
4839out:
4840 SPPP_UNLOCK(sp);
|
4885 splx(s);
| |
4886 callout_reset(&sp->keepalive_callout, hz * 10, sppp_keepalive,
4887 (void *)sp);
4888}
4889
4890/*
4891 * Get both IP addresses.
4892 */
4893void
4894sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
4895{
4896 struct ifnet *ifp = SP2IFP(sp);
4897 struct ifaddr *ifa;
4898 struct sockaddr_in *si, *sm;
4899 u_long ssrc, ddst;
4900
4901 sm = NULL;
4902 ssrc = ddst = 0L;
4903 /*
4904 * Pick the first AF_INET address from the list,
4905 * aliases don't make any sense on a p2p link anyway.
4906 */
4907 si = 0;
4908 if_addr_rlock(ifp);
4909 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4910 if (ifa->ifa_addr->sa_family == AF_INET) {
4911 si = (struct sockaddr_in *)ifa->ifa_addr;
4912 sm = (struct sockaddr_in *)ifa->ifa_netmask;
4913 if (si)
4914 break;
4915 }
4916 if (ifa) {
4917 if (si && si->sin_addr.s_addr) {
4918 ssrc = si->sin_addr.s_addr;
4919 if (srcmask)
4920 *srcmask = ntohl(sm->sin_addr.s_addr);
4921 }
4922
4923 si = (struct sockaddr_in *)ifa->ifa_dstaddr;
4924 if (si && si->sin_addr.s_addr)
4925 ddst = si->sin_addr.s_addr;
4926 }
4927 if_addr_runlock(ifp);
4928
4929 if (dst) *dst = ntohl(ddst);
4930 if (src) *src = ntohl(ssrc);
4931}
4932
4933#ifdef INET
4934/*
| 4841 callout_reset(&sp->keepalive_callout, hz * 10, sppp_keepalive,
4842 (void *)sp);
4843}
4844
4845/*
4846 * Get both IP addresses.
4847 */
4848void
4849sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
4850{
4851 struct ifnet *ifp = SP2IFP(sp);
4852 struct ifaddr *ifa;
4853 struct sockaddr_in *si, *sm;
4854 u_long ssrc, ddst;
4855
4856 sm = NULL;
4857 ssrc = ddst = 0L;
4858 /*
4859 * Pick the first AF_INET address from the list,
4860 * aliases don't make any sense on a p2p link anyway.
4861 */
4862 si = 0;
4863 if_addr_rlock(ifp);
4864 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4865 if (ifa->ifa_addr->sa_family == AF_INET) {
4866 si = (struct sockaddr_in *)ifa->ifa_addr;
4867 sm = (struct sockaddr_in *)ifa->ifa_netmask;
4868 if (si)
4869 break;
4870 }
4871 if (ifa) {
4872 if (si && si->sin_addr.s_addr) {
4873 ssrc = si->sin_addr.s_addr;
4874 if (srcmask)
4875 *srcmask = ntohl(sm->sin_addr.s_addr);
4876 }
4877
4878 si = (struct sockaddr_in *)ifa->ifa_dstaddr;
4879 if (si && si->sin_addr.s_addr)
4880 ddst = si->sin_addr.s_addr;
4881 }
4882 if_addr_runlock(ifp);
4883
4884 if (dst) *dst = ntohl(ddst);
4885 if (src) *src = ntohl(ssrc);
4886}
4887
4888#ifdef INET
4889/*
|
4935 * Set my IP address. Must be called at splimp.
| 4890 * Set my IP address.
|
4936 */
4937static void
4938sppp_set_ip_addr(struct sppp *sp, u_long src)
4939{
4940 STDDCL;
4941 struct ifaddr *ifa;
4942 struct sockaddr_in *si;
4943 struct in_ifaddr *ia;
4944
4945 /*
4946 * Pick the first AF_INET address from the list,
4947 * aliases don't make any sense on a p2p link anyway.
4948 */
4949 si = 0;
4950 if_addr_rlock(ifp);
4951 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
4952 if (ifa->ifa_addr->sa_family == AF_INET) {
4953 si = (struct sockaddr_in *)ifa->ifa_addr;
4954 if (si != NULL) {
4955 ifa_ref(ifa);
4956 break;
4957 }
4958 }
4959 }
4960 if_addr_runlock(ifp);
4961
4962 if (ifa != NULL) {
4963 int error;
4964
4965 /* delete old route */
4966 error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
4967 if (debug && error) {
4968 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
4969 SPP_ARGS(ifp), error);
4970 }
4971
4972 /* set new address */
4973 si->sin_addr.s_addr = htonl(src);
4974 ia = ifatoia(ifa);
4975 IN_IFADDR_WLOCK();
4976 LIST_REMOVE(ia, ia_hash);
4977 LIST_INSERT_HEAD(INADDR_HASH(si->sin_addr.s_addr), ia, ia_hash);
4978 IN_IFADDR_WUNLOCK();
4979
4980 /* add new route */
4981 error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);
4982 if (debug && error) {
4983 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
4984 SPP_ARGS(ifp), error);
4985 }
4986 ifa_free(ifa);
4987 }
4988}
4989#endif
4990
4991#ifdef INET6
4992/*
4993 * Get both IPv6 addresses.
4994 */
4995static void
4996sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst,
4997 struct in6_addr *srcmask)
4998{
4999 struct ifnet *ifp = SP2IFP(sp);
5000 struct ifaddr *ifa;
5001 struct sockaddr_in6 *si, *sm;
5002 struct in6_addr ssrc, ddst;
5003
5004 sm = NULL;
5005 bzero(&ssrc, sizeof(ssrc));
5006 bzero(&ddst, sizeof(ddst));
5007 /*
5008 * Pick the first link-local AF_INET6 address from the list,
5009 * aliases don't make any sense on a p2p link anyway.
5010 */
5011 si = NULL;
5012 if_addr_rlock(ifp);
5013 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
5014 if (ifa->ifa_addr->sa_family == AF_INET6) {
5015 si = (struct sockaddr_in6 *)ifa->ifa_addr;
5016 sm = (struct sockaddr_in6 *)ifa->ifa_netmask;
5017 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr))
5018 break;
5019 }
5020 if (ifa) {
5021 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) {
5022 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc));
5023 if (srcmask) {
5024 bcopy(&sm->sin6_addr, srcmask,
5025 sizeof(*srcmask));
5026 }
5027 }
5028
5029 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
5030 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr))
5031 bcopy(&si->sin6_addr, &ddst, sizeof(ddst));
5032 }
5033
5034 if (dst)
5035 bcopy(&ddst, dst, sizeof(*dst));
5036 if (src)
5037 bcopy(&ssrc, src, sizeof(*src));
5038 if_addr_runlock(ifp);
5039}
5040
5041#ifdef IPV6CP_MYIFID_DYN
5042/*
5043 * Generate random ifid.
5044 */
5045static void
5046sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr)
5047{
5048 /* TBD */
5049}
5050
5051/*
| 4891 */
4892static void
4893sppp_set_ip_addr(struct sppp *sp, u_long src)
4894{
4895 STDDCL;
4896 struct ifaddr *ifa;
4897 struct sockaddr_in *si;
4898 struct in_ifaddr *ia;
4899
4900 /*
4901 * Pick the first AF_INET address from the list,
4902 * aliases don't make any sense on a p2p link anyway.
4903 */
4904 si = 0;
4905 if_addr_rlock(ifp);
4906 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
4907 if (ifa->ifa_addr->sa_family == AF_INET) {
4908 si = (struct sockaddr_in *)ifa->ifa_addr;
4909 if (si != NULL) {
4910 ifa_ref(ifa);
4911 break;
4912 }
4913 }
4914 }
4915 if_addr_runlock(ifp);
4916
4917 if (ifa != NULL) {
4918 int error;
4919
4920 /* delete old route */
4921 error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
4922 if (debug && error) {
4923 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
4924 SPP_ARGS(ifp), error);
4925 }
4926
4927 /* set new address */
4928 si->sin_addr.s_addr = htonl(src);
4929 ia = ifatoia(ifa);
4930 IN_IFADDR_WLOCK();
4931 LIST_REMOVE(ia, ia_hash);
4932 LIST_INSERT_HEAD(INADDR_HASH(si->sin_addr.s_addr), ia, ia_hash);
4933 IN_IFADDR_WUNLOCK();
4934
4935 /* add new route */
4936 error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);
4937 if (debug && error) {
4938 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
4939 SPP_ARGS(ifp), error);
4940 }
4941 ifa_free(ifa);
4942 }
4943}
4944#endif
4945
4946#ifdef INET6
4947/*
4948 * Get both IPv6 addresses.
4949 */
4950static void
4951sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst,
4952 struct in6_addr *srcmask)
4953{
4954 struct ifnet *ifp = SP2IFP(sp);
4955 struct ifaddr *ifa;
4956 struct sockaddr_in6 *si, *sm;
4957 struct in6_addr ssrc, ddst;
4958
4959 sm = NULL;
4960 bzero(&ssrc, sizeof(ssrc));
4961 bzero(&ddst, sizeof(ddst));
4962 /*
4963 * Pick the first link-local AF_INET6 address from the list,
4964 * aliases don't make any sense on a p2p link anyway.
4965 */
4966 si = NULL;
4967 if_addr_rlock(ifp);
4968 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4969 if (ifa->ifa_addr->sa_family == AF_INET6) {
4970 si = (struct sockaddr_in6 *)ifa->ifa_addr;
4971 sm = (struct sockaddr_in6 *)ifa->ifa_netmask;
4972 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr))
4973 break;
4974 }
4975 if (ifa) {
4976 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) {
4977 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc));
4978 if (srcmask) {
4979 bcopy(&sm->sin6_addr, srcmask,
4980 sizeof(*srcmask));
4981 }
4982 }
4983
4984 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
4985 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr))
4986 bcopy(&si->sin6_addr, &ddst, sizeof(ddst));
4987 }
4988
4989 if (dst)
4990 bcopy(&ddst, dst, sizeof(*dst));
4991 if (src)
4992 bcopy(&ssrc, src, sizeof(*src));
4993 if_addr_runlock(ifp);
4994}
4995
4996#ifdef IPV6CP_MYIFID_DYN
4997/*
4998 * Generate random ifid.
4999 */
5000static void
5001sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr)
5002{
5003 /* TBD */
5004}
5005
5006/*
|
5052 * Set my IPv6 address. Must be called at splimp.
| 5007 * Set my IPv6 address.
|
5053 */
5054static void
5055sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src)
5056{
5057 STDDCL;
5058 struct ifaddr *ifa;
5059 struct sockaddr_in6 *sin6;
5060
5061 /*
5062 * Pick the first link-local AF_INET6 address from the list,
5063 * aliases don't make any sense on a p2p link anyway.
5064 */
5065
5066 sin6 = NULL;
5067 if_addr_rlock(ifp);
5068 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
5069 if (ifa->ifa_addr->sa_family == AF_INET6) {
5070 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
5071 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
5072 ifa_ref(ifa);
5073 break;
5074 }
5075 }
5076 }
5077 if_addr_runlock(ifp);
5078
5079 if (ifa != NULL) {
5080 int error;
5081 struct sockaddr_in6 new_sin6 = *sin6;
5082
5083 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr));
5084 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1);
5085 if (debug && error) {
5086 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit "
5087 " failed, error=%d\n", SPP_ARGS(ifp), error);
5088 }
5089 ifa_free(ifa);
5090 }
5091}
5092#endif
5093
5094/*
5095 * Suggest a candidate address to be used by peer.
5096 */
5097static void
5098sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest)
5099{
5100 struct in6_addr myaddr;
5101 struct timeval tv;
5102
5103 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
5104
5105 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */
5106 microtime(&tv);
5107 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) {
5108 myaddr.s6_addr[14] ^= 0xff;
5109 myaddr.s6_addr[15] ^= 0xff;
5110 } else {
5111 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff);
5112 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff);
5113 }
5114 if (suggest)
5115 bcopy(&myaddr, suggest, sizeof(myaddr));
5116}
5117#endif /*INET6*/
5118
5119static int
5120sppp_params(struct sppp *sp, u_long cmd, void *data)
5121{
5122 u_long subcmd;
5123 struct ifreq *ifr = (struct ifreq *)data;
5124 struct spppreq *spr;
5125 int rv = 0;
5126
5127 if ((spr = malloc(sizeof(struct spppreq), M_TEMP, M_NOWAIT)) == 0)
5128 return (EAGAIN);
5129 /*
5130 * ifr->ifr_data is supposed to point to a struct spppreq.
5131 * Check the cmd word first before attempting to fetch all the
5132 * data.
5133 */
5134 if ((subcmd = fuword(ifr->ifr_data)) == -1) {
5135 rv = EFAULT;
5136 goto quit;
5137 }
5138
5139 if (copyin((caddr_t)ifr->ifr_data, spr, sizeof(struct spppreq)) != 0) {
5140 rv = EFAULT;
5141 goto quit;
5142 }
5143
5144 switch (subcmd) {
5145 case (u_long)SPPPIOGDEFS:
5146 if (cmd != SIOCGIFGENERIC) {
5147 rv = EINVAL;
5148 break;
5149 }
5150 /*
5151 * We copy over the entire current state, but clean
5152 * out some of the stuff we don't wanna pass up.
5153 * Remember, SIOCGIFGENERIC is unprotected, and can be
5154 * called by any user. No need to ever get PAP or
5155 * CHAP secrets back to userland anyway.
5156 */
5157 spr->defs.pp_phase = sp->pp_phase;
5158 spr->defs.enable_vj = (sp->confflags & CONF_ENABLE_VJ) != 0;
5159 spr->defs.enable_ipv6 = (sp->confflags & CONF_ENABLE_IPV6) != 0;
5160 spr->defs.lcp = sp->lcp;
5161 spr->defs.ipcp = sp->ipcp;
5162 spr->defs.ipv6cp = sp->ipv6cp;
5163 spr->defs.myauth = sp->myauth;
5164 spr->defs.hisauth = sp->hisauth;
5165 bzero(spr->defs.myauth.secret, AUTHKEYLEN);
5166 bzero(spr->defs.myauth.challenge, AUTHKEYLEN);
5167 bzero(spr->defs.hisauth.secret, AUTHKEYLEN);
5168 bzero(spr->defs.hisauth.challenge, AUTHKEYLEN);
5169 /*
5170 * Fixup the LCP timeout value to milliseconds so
5171 * spppcontrol doesn't need to bother about the value
5172 * of "hz". We do the reverse calculation below when
5173 * setting it.
5174 */
5175 spr->defs.lcp.timeout = sp->lcp.timeout * 1000 / hz;
5176 rv = copyout(spr, (caddr_t)ifr->ifr_data,
5177 sizeof(struct spppreq));
5178 break;
5179
5180 case (u_long)SPPPIOSDEFS:
5181 if (cmd != SIOCSIFGENERIC) {
5182 rv = EINVAL;
5183 break;
5184 }
5185 /*
5186 * We have a very specific idea of which fields we
5187 * allow being passed back from userland, so to not
5188 * clobber our current state. For one, we only allow
5189 * setting anything if LCP is in dead or establish
5190 * phase. Once the authentication negotiations
5191 * started, the authentication settings must not be
5192 * changed again. (The administrator can force an
5193 * ifconfig down in order to get LCP back into dead
5194 * phase.)
5195 *
5196 * Also, we only allow for authentication parameters to be
5197 * specified.
5198 *
5199 * XXX Should allow to set or clear pp_flags.
5200 *
5201 * Finally, if the respective authentication protocol to
5202 * be used is set differently than 0, but the secret is
5203 * passed as all zeros, we don't trash the existing secret.
5204 * This allows an administrator to change the system name
5205 * only without clobbering the secret (which he didn't get
5206 * back in a previous SPPPIOGDEFS call). However, the
5207 * secrets are cleared if the authentication protocol is
5208 * reset to 0. */
5209 if (sp->pp_phase != PHASE_DEAD &&
5210 sp->pp_phase != PHASE_ESTABLISH) {
5211 rv = EBUSY;
5212 break;
5213 }
5214
5215 if ((spr->defs.myauth.proto != 0 && spr->defs.myauth.proto != PPP_PAP &&
5216 spr->defs.myauth.proto != PPP_CHAP) ||
5217 (spr->defs.hisauth.proto != 0 && spr->defs.hisauth.proto != PPP_PAP &&
5218 spr->defs.hisauth.proto != PPP_CHAP)) {
5219 rv = EINVAL;
5220 break;
5221 }
5222
5223 if (spr->defs.myauth.proto == 0)
5224 /* resetting myauth */
5225 bzero(&sp->myauth, sizeof sp->myauth);
5226 else {
5227 /* setting/changing myauth */
5228 sp->myauth.proto = spr->defs.myauth.proto;
5229 bcopy(spr->defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
5230 if (spr->defs.myauth.secret[0] != '\0')
5231 bcopy(spr->defs.myauth.secret, sp->myauth.secret,
5232 AUTHKEYLEN);
5233 }
5234 if (spr->defs.hisauth.proto == 0)
5235 /* resetting hisauth */
5236 bzero(&sp->hisauth, sizeof sp->hisauth);
5237 else {
5238 /* setting/changing hisauth */
5239 sp->hisauth.proto = spr->defs.hisauth.proto;
5240 sp->hisauth.flags = spr->defs.hisauth.flags;
5241 bcopy(spr->defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
5242 if (spr->defs.hisauth.secret[0] != '\0')
5243 bcopy(spr->defs.hisauth.secret, sp->hisauth.secret,
5244 AUTHKEYLEN);
5245 }
5246 /* set LCP restart timer timeout */
5247 if (spr->defs.lcp.timeout != 0)
5248 sp->lcp.timeout = spr->defs.lcp.timeout * hz / 1000;
5249 /* set VJ enable and IPv6 disable flags */
5250#ifdef INET
5251 if (spr->defs.enable_vj)
5252 sp->confflags |= CONF_ENABLE_VJ;
5253 else
5254 sp->confflags &= ~CONF_ENABLE_VJ;
5255#endif
5256#ifdef INET6
5257 if (spr->defs.enable_ipv6)
5258 sp->confflags |= CONF_ENABLE_IPV6;
5259 else
5260 sp->confflags &= ~CONF_ENABLE_IPV6;
5261#endif
5262 break;
5263
5264 default:
5265 rv = EINVAL;
5266 }
5267
5268 quit:
5269 free(spr, M_TEMP);
5270
5271 return (rv);
5272}
5273
5274static void
5275sppp_phase_network(struct sppp *sp)
5276{
5277 STDDCL;
5278 int i;
5279 u_long mask;
5280
5281 sp->pp_phase = PHASE_NETWORK;
5282
5283 if (debug)
5284 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
5285 sppp_phase_name(sp->pp_phase));
5286
5287 /* Notify NCPs now. */
5288 for (i = 0; i < IDX_COUNT; i++)
5289 if ((cps[i])->flags & CP_NCP)
5290 (cps[i])->Open(sp);
5291
5292 /* Send Up events to all NCPs. */
5293 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
5294 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP))
5295 (cps[i])->Up(sp);
5296
5297 /* if no NCP is starting, all this was in vain, close down */
5298 sppp_lcp_check_and_close(sp);
5299}
5300
5301
5302static const char *
5303sppp_cp_type_name(u_char type)
5304{
5305 static char buf[12];
5306 switch (type) {
5307 case CONF_REQ: return "conf-req";
5308 case CONF_ACK: return "conf-ack";
5309 case CONF_NAK: return "conf-nak";
5310 case CONF_REJ: return "conf-rej";
5311 case TERM_REQ: return "term-req";
5312 case TERM_ACK: return "term-ack";
5313 case CODE_REJ: return "code-rej";
5314 case PROTO_REJ: return "proto-rej";
5315 case ECHO_REQ: return "echo-req";
5316 case ECHO_REPLY: return "echo-reply";
5317 case DISC_REQ: return "discard-req";
5318 }
5319 snprintf (buf, sizeof(buf), "cp/0x%x", type);
5320 return buf;
5321}
5322
5323static const char *
5324sppp_auth_type_name(u_short proto, u_char type)
5325{
5326 static char buf[12];
5327 switch (proto) {
5328 case PPP_CHAP:
5329 switch (type) {
5330 case CHAP_CHALLENGE: return "challenge";
5331 case CHAP_RESPONSE: return "response";
5332 case CHAP_SUCCESS: return "success";
5333 case CHAP_FAILURE: return "failure";
5334 }
5335 case PPP_PAP:
5336 switch (type) {
5337 case PAP_REQ: return "req";
5338 case PAP_ACK: return "ack";
5339 case PAP_NAK: return "nak";
5340 }
5341 }
5342 snprintf (buf, sizeof(buf), "auth/0x%x", type);
5343 return buf;
5344}
5345
5346static const char *
5347sppp_lcp_opt_name(u_char opt)
5348{
5349 static char buf[12];
5350 switch (opt) {
5351 case LCP_OPT_MRU: return "mru";
5352 case LCP_OPT_ASYNC_MAP: return "async-map";
5353 case LCP_OPT_AUTH_PROTO: return "auth-proto";
5354 case LCP_OPT_QUAL_PROTO: return "qual-proto";
5355 case LCP_OPT_MAGIC: return "magic";
5356 case LCP_OPT_PROTO_COMP: return "proto-comp";
5357 case LCP_OPT_ADDR_COMP: return "addr-comp";
5358 }
5359 snprintf (buf, sizeof(buf), "lcp/0x%x", opt);
5360 return buf;
5361}
5362
5363#ifdef INET
5364static const char *
5365sppp_ipcp_opt_name(u_char opt)
5366{
5367 static char buf[12];
5368 switch (opt) {
5369 case IPCP_OPT_ADDRESSES: return "addresses";
5370 case IPCP_OPT_COMPRESSION: return "compression";
5371 case IPCP_OPT_ADDRESS: return "address";
5372 }
5373 snprintf (buf, sizeof(buf), "ipcp/0x%x", opt);
5374 return buf;
5375}
5376#endif
5377
5378#ifdef INET6
5379static const char *
5380sppp_ipv6cp_opt_name(u_char opt)
5381{
5382 static char buf[12];
5383 switch (opt) {
5384 case IPV6CP_OPT_IFID: return "ifid";
5385 case IPV6CP_OPT_COMPRESSION: return "compression";
5386 }
5387 sprintf (buf, "0x%x", opt);
5388 return buf;
5389}
5390#endif
5391
5392static const char *
5393sppp_state_name(int state)
5394{
5395 switch (state) {
5396 case STATE_INITIAL: return "initial";
5397 case STATE_STARTING: return "starting";
5398 case STATE_CLOSED: return "closed";
5399 case STATE_STOPPED: return "stopped";
5400 case STATE_CLOSING: return "closing";
5401 case STATE_STOPPING: return "stopping";
5402 case STATE_REQ_SENT: return "req-sent";
5403 case STATE_ACK_RCVD: return "ack-rcvd";
5404 case STATE_ACK_SENT: return "ack-sent";
5405 case STATE_OPENED: return "opened";
5406 }
5407 return "illegal";
5408}
5409
5410static const char *
5411sppp_phase_name(enum ppp_phase phase)
5412{
5413 switch (phase) {
5414 case PHASE_DEAD: return "dead";
5415 case PHASE_ESTABLISH: return "establish";
5416 case PHASE_TERMINATE: return "terminate";
5417 case PHASE_AUTHENTICATE: return "authenticate";
5418 case PHASE_NETWORK: return "network";
5419 }
5420 return "illegal";
5421}
5422
5423static const char *
5424sppp_proto_name(u_short proto)
5425{
5426 static char buf[12];
5427 switch (proto) {
5428 case PPP_LCP: return "lcp";
5429 case PPP_IPCP: return "ipcp";
5430 case PPP_PAP: return "pap";
5431 case PPP_CHAP: return "chap";
5432 case PPP_IPV6CP: return "ipv6cp";
5433 }
5434 snprintf(buf, sizeof(buf), "proto/0x%x", (unsigned)proto);
5435 return buf;
5436}
5437
5438static void
5439sppp_print_bytes(const u_char *p, u_short len)
5440{
5441 if (len)
5442 log(-1, " %*D", len, p, "-");
5443}
5444
5445static void
5446sppp_print_string(const char *p, u_short len)
5447{
5448 u_char c;
5449
5450 while (len-- > 0) {
5451 c = *p++;
5452 /*
5453 * Print only ASCII chars directly. RFC 1994 recommends
5454 * using only them, but we don't rely on it. */
5455 if (c < ' ' || c > '~')
5456 log(-1, "\\x%x", c);
5457 else
5458 log(-1, "%c", c);
5459 }
5460}
5461
5462#ifdef INET
5463static const char *
5464sppp_dotted_quad(u_long addr)
5465{
5466 static char s[16];
5467 sprintf(s, "%d.%d.%d.%d",
5468 (int)((addr >> 24) & 0xff),
5469 (int)((addr >> 16) & 0xff),
5470 (int)((addr >> 8) & 0xff),
5471 (int)(addr & 0xff));
5472 return s;
5473}
5474#endif
5475
5476static int
5477sppp_strnlen(u_char *p, int max)
5478{
5479 int len;
5480
5481 for (len = 0; len < max && *p; ++p)
5482 ++len;
5483 return len;
5484}
5485
5486/* a dummy, used to drop uninteresting events */
5487static void
5488sppp_null(struct sppp *unused)
5489{
5490 /* do just nothing */
5491}
| 5008 */
5009static void
5010sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src)
5011{
5012 STDDCL;
5013 struct ifaddr *ifa;
5014 struct sockaddr_in6 *sin6;
5015
5016 /*
5017 * Pick the first link-local AF_INET6 address from the list,
5018 * aliases don't make any sense on a p2p link anyway.
5019 */
5020
5021 sin6 = NULL;
5022 if_addr_rlock(ifp);
5023 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
5024 if (ifa->ifa_addr->sa_family == AF_INET6) {
5025 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
5026 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) {
5027 ifa_ref(ifa);
5028 break;
5029 }
5030 }
5031 }
5032 if_addr_runlock(ifp);
5033
5034 if (ifa != NULL) {
5035 int error;
5036 struct sockaddr_in6 new_sin6 = *sin6;
5037
5038 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr));
5039 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1);
5040 if (debug && error) {
5041 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit "
5042 " failed, error=%d\n", SPP_ARGS(ifp), error);
5043 }
5044 ifa_free(ifa);
5045 }
5046}
5047#endif
5048
5049/*
5050 * Suggest a candidate address to be used by peer.
5051 */
5052static void
5053sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest)
5054{
5055 struct in6_addr myaddr;
5056 struct timeval tv;
5057
5058 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
5059
5060 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */
5061 microtime(&tv);
5062 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) {
5063 myaddr.s6_addr[14] ^= 0xff;
5064 myaddr.s6_addr[15] ^= 0xff;
5065 } else {
5066 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff);
5067 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff);
5068 }
5069 if (suggest)
5070 bcopy(&myaddr, suggest, sizeof(myaddr));
5071}
5072#endif /*INET6*/
5073
5074static int
5075sppp_params(struct sppp *sp, u_long cmd, void *data)
5076{
5077 u_long subcmd;
5078 struct ifreq *ifr = (struct ifreq *)data;
5079 struct spppreq *spr;
5080 int rv = 0;
5081
5082 if ((spr = malloc(sizeof(struct spppreq), M_TEMP, M_NOWAIT)) == 0)
5083 return (EAGAIN);
5084 /*
5085 * ifr->ifr_data is supposed to point to a struct spppreq.
5086 * Check the cmd word first before attempting to fetch all the
5087 * data.
5088 */
5089 if ((subcmd = fuword(ifr->ifr_data)) == -1) {
5090 rv = EFAULT;
5091 goto quit;
5092 }
5093
5094 if (copyin((caddr_t)ifr->ifr_data, spr, sizeof(struct spppreq)) != 0) {
5095 rv = EFAULT;
5096 goto quit;
5097 }
5098
5099 switch (subcmd) {
5100 case (u_long)SPPPIOGDEFS:
5101 if (cmd != SIOCGIFGENERIC) {
5102 rv = EINVAL;
5103 break;
5104 }
5105 /*
5106 * We copy over the entire current state, but clean
5107 * out some of the stuff we don't wanna pass up.
5108 * Remember, SIOCGIFGENERIC is unprotected, and can be
5109 * called by any user. No need to ever get PAP or
5110 * CHAP secrets back to userland anyway.
5111 */
5112 spr->defs.pp_phase = sp->pp_phase;
5113 spr->defs.enable_vj = (sp->confflags & CONF_ENABLE_VJ) != 0;
5114 spr->defs.enable_ipv6 = (sp->confflags & CONF_ENABLE_IPV6) != 0;
5115 spr->defs.lcp = sp->lcp;
5116 spr->defs.ipcp = sp->ipcp;
5117 spr->defs.ipv6cp = sp->ipv6cp;
5118 spr->defs.myauth = sp->myauth;
5119 spr->defs.hisauth = sp->hisauth;
5120 bzero(spr->defs.myauth.secret, AUTHKEYLEN);
5121 bzero(spr->defs.myauth.challenge, AUTHKEYLEN);
5122 bzero(spr->defs.hisauth.secret, AUTHKEYLEN);
5123 bzero(spr->defs.hisauth.challenge, AUTHKEYLEN);
5124 /*
5125 * Fixup the LCP timeout value to milliseconds so
5126 * spppcontrol doesn't need to bother about the value
5127 * of "hz". We do the reverse calculation below when
5128 * setting it.
5129 */
5130 spr->defs.lcp.timeout = sp->lcp.timeout * 1000 / hz;
5131 rv = copyout(spr, (caddr_t)ifr->ifr_data,
5132 sizeof(struct spppreq));
5133 break;
5134
5135 case (u_long)SPPPIOSDEFS:
5136 if (cmd != SIOCSIFGENERIC) {
5137 rv = EINVAL;
5138 break;
5139 }
5140 /*
5141 * We have a very specific idea of which fields we
5142 * allow being passed back from userland, so to not
5143 * clobber our current state. For one, we only allow
5144 * setting anything if LCP is in dead or establish
5145 * phase. Once the authentication negotiations
5146 * started, the authentication settings must not be
5147 * changed again. (The administrator can force an
5148 * ifconfig down in order to get LCP back into dead
5149 * phase.)
5150 *
5151 * Also, we only allow for authentication parameters to be
5152 * specified.
5153 *
5154 * XXX Should allow to set or clear pp_flags.
5155 *
5156 * Finally, if the respective authentication protocol to
5157 * be used is set differently than 0, but the secret is
5158 * passed as all zeros, we don't trash the existing secret.
5159 * This allows an administrator to change the system name
5160 * only without clobbering the secret (which he didn't get
5161 * back in a previous SPPPIOGDEFS call). However, the
5162 * secrets are cleared if the authentication protocol is
5163 * reset to 0. */
5164 if (sp->pp_phase != PHASE_DEAD &&
5165 sp->pp_phase != PHASE_ESTABLISH) {
5166 rv = EBUSY;
5167 break;
5168 }
5169
5170 if ((spr->defs.myauth.proto != 0 && spr->defs.myauth.proto != PPP_PAP &&
5171 spr->defs.myauth.proto != PPP_CHAP) ||
5172 (spr->defs.hisauth.proto != 0 && spr->defs.hisauth.proto != PPP_PAP &&
5173 spr->defs.hisauth.proto != PPP_CHAP)) {
5174 rv = EINVAL;
5175 break;
5176 }
5177
5178 if (spr->defs.myauth.proto == 0)
5179 /* resetting myauth */
5180 bzero(&sp->myauth, sizeof sp->myauth);
5181 else {
5182 /* setting/changing myauth */
5183 sp->myauth.proto = spr->defs.myauth.proto;
5184 bcopy(spr->defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
5185 if (spr->defs.myauth.secret[0] != '\0')
5186 bcopy(spr->defs.myauth.secret, sp->myauth.secret,
5187 AUTHKEYLEN);
5188 }
5189 if (spr->defs.hisauth.proto == 0)
5190 /* resetting hisauth */
5191 bzero(&sp->hisauth, sizeof sp->hisauth);
5192 else {
5193 /* setting/changing hisauth */
5194 sp->hisauth.proto = spr->defs.hisauth.proto;
5195 sp->hisauth.flags = spr->defs.hisauth.flags;
5196 bcopy(spr->defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
5197 if (spr->defs.hisauth.secret[0] != '\0')
5198 bcopy(spr->defs.hisauth.secret, sp->hisauth.secret,
5199 AUTHKEYLEN);
5200 }
5201 /* set LCP restart timer timeout */
5202 if (spr->defs.lcp.timeout != 0)
5203 sp->lcp.timeout = spr->defs.lcp.timeout * hz / 1000;
5204 /* set VJ enable and IPv6 disable flags */
5205#ifdef INET
5206 if (spr->defs.enable_vj)
5207 sp->confflags |= CONF_ENABLE_VJ;
5208 else
5209 sp->confflags &= ~CONF_ENABLE_VJ;
5210#endif
5211#ifdef INET6
5212 if (spr->defs.enable_ipv6)
5213 sp->confflags |= CONF_ENABLE_IPV6;
5214 else
5215 sp->confflags &= ~CONF_ENABLE_IPV6;
5216#endif
5217 break;
5218
5219 default:
5220 rv = EINVAL;
5221 }
5222
5223 quit:
5224 free(spr, M_TEMP);
5225
5226 return (rv);
5227}
5228
5229static void
5230sppp_phase_network(struct sppp *sp)
5231{
5232 STDDCL;
5233 int i;
5234 u_long mask;
5235
5236 sp->pp_phase = PHASE_NETWORK;
5237
5238 if (debug)
5239 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
5240 sppp_phase_name(sp->pp_phase));
5241
5242 /* Notify NCPs now. */
5243 for (i = 0; i < IDX_COUNT; i++)
5244 if ((cps[i])->flags & CP_NCP)
5245 (cps[i])->Open(sp);
5246
5247 /* Send Up events to all NCPs. */
5248 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
5249 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP))
5250 (cps[i])->Up(sp);
5251
5252 /* if no NCP is starting, all this was in vain, close down */
5253 sppp_lcp_check_and_close(sp);
5254}
5255
5256
5257static const char *
5258sppp_cp_type_name(u_char type)
5259{
5260 static char buf[12];
5261 switch (type) {
5262 case CONF_REQ: return "conf-req";
5263 case CONF_ACK: return "conf-ack";
5264 case CONF_NAK: return "conf-nak";
5265 case CONF_REJ: return "conf-rej";
5266 case TERM_REQ: return "term-req";
5267 case TERM_ACK: return "term-ack";
5268 case CODE_REJ: return "code-rej";
5269 case PROTO_REJ: return "proto-rej";
5270 case ECHO_REQ: return "echo-req";
5271 case ECHO_REPLY: return "echo-reply";
5272 case DISC_REQ: return "discard-req";
5273 }
5274 snprintf (buf, sizeof(buf), "cp/0x%x", type);
5275 return buf;
5276}
5277
5278static const char *
5279sppp_auth_type_name(u_short proto, u_char type)
5280{
5281 static char buf[12];
5282 switch (proto) {
5283 case PPP_CHAP:
5284 switch (type) {
5285 case CHAP_CHALLENGE: return "challenge";
5286 case CHAP_RESPONSE: return "response";
5287 case CHAP_SUCCESS: return "success";
5288 case CHAP_FAILURE: return "failure";
5289 }
5290 case PPP_PAP:
5291 switch (type) {
5292 case PAP_REQ: return "req";
5293 case PAP_ACK: return "ack";
5294 case PAP_NAK: return "nak";
5295 }
5296 }
5297 snprintf (buf, sizeof(buf), "auth/0x%x", type);
5298 return buf;
5299}
5300
5301static const char *
5302sppp_lcp_opt_name(u_char opt)
5303{
5304 static char buf[12];
5305 switch (opt) {
5306 case LCP_OPT_MRU: return "mru";
5307 case LCP_OPT_ASYNC_MAP: return "async-map";
5308 case LCP_OPT_AUTH_PROTO: return "auth-proto";
5309 case LCP_OPT_QUAL_PROTO: return "qual-proto";
5310 case LCP_OPT_MAGIC: return "magic";
5311 case LCP_OPT_PROTO_COMP: return "proto-comp";
5312 case LCP_OPT_ADDR_COMP: return "addr-comp";
5313 }
5314 snprintf (buf, sizeof(buf), "lcp/0x%x", opt);
5315 return buf;
5316}
5317
5318#ifdef INET
5319static const char *
5320sppp_ipcp_opt_name(u_char opt)
5321{
5322 static char buf[12];
5323 switch (opt) {
5324 case IPCP_OPT_ADDRESSES: return "addresses";
5325 case IPCP_OPT_COMPRESSION: return "compression";
5326 case IPCP_OPT_ADDRESS: return "address";
5327 }
5328 snprintf (buf, sizeof(buf), "ipcp/0x%x", opt);
5329 return buf;
5330}
5331#endif
5332
5333#ifdef INET6
5334static const char *
5335sppp_ipv6cp_opt_name(u_char opt)
5336{
5337 static char buf[12];
5338 switch (opt) {
5339 case IPV6CP_OPT_IFID: return "ifid";
5340 case IPV6CP_OPT_COMPRESSION: return "compression";
5341 }
5342 sprintf (buf, "0x%x", opt);
5343 return buf;
5344}
5345#endif
5346
5347static const char *
5348sppp_state_name(int state)
5349{
5350 switch (state) {
5351 case STATE_INITIAL: return "initial";
5352 case STATE_STARTING: return "starting";
5353 case STATE_CLOSED: return "closed";
5354 case STATE_STOPPED: return "stopped";
5355 case STATE_CLOSING: return "closing";
5356 case STATE_STOPPING: return "stopping";
5357 case STATE_REQ_SENT: return "req-sent";
5358 case STATE_ACK_RCVD: return "ack-rcvd";
5359 case STATE_ACK_SENT: return "ack-sent";
5360 case STATE_OPENED: return "opened";
5361 }
5362 return "illegal";
5363}
5364
5365static const char *
5366sppp_phase_name(enum ppp_phase phase)
5367{
5368 switch (phase) {
5369 case PHASE_DEAD: return "dead";
5370 case PHASE_ESTABLISH: return "establish";
5371 case PHASE_TERMINATE: return "terminate";
5372 case PHASE_AUTHENTICATE: return "authenticate";
5373 case PHASE_NETWORK: return "network";
5374 }
5375 return "illegal";
5376}
5377
5378static const char *
5379sppp_proto_name(u_short proto)
5380{
5381 static char buf[12];
5382 switch (proto) {
5383 case PPP_LCP: return "lcp";
5384 case PPP_IPCP: return "ipcp";
5385 case PPP_PAP: return "pap";
5386 case PPP_CHAP: return "chap";
5387 case PPP_IPV6CP: return "ipv6cp";
5388 }
5389 snprintf(buf, sizeof(buf), "proto/0x%x", (unsigned)proto);
5390 return buf;
5391}
5392
5393static void
5394sppp_print_bytes(const u_char *p, u_short len)
5395{
5396 if (len)
5397 log(-1, " %*D", len, p, "-");
5398}
5399
5400static void
5401sppp_print_string(const char *p, u_short len)
5402{
5403 u_char c;
5404
5405 while (len-- > 0) {
5406 c = *p++;
5407 /*
5408 * Print only ASCII chars directly. RFC 1994 recommends
5409 * using only them, but we don't rely on it. */
5410 if (c < ' ' || c > '~')
5411 log(-1, "\\x%x", c);
5412 else
5413 log(-1, "%c", c);
5414 }
5415}
5416
5417#ifdef INET
5418static const char *
5419sppp_dotted_quad(u_long addr)
5420{
5421 static char s[16];
5422 sprintf(s, "%d.%d.%d.%d",
5423 (int)((addr >> 24) & 0xff),
5424 (int)((addr >> 16) & 0xff),
5425 (int)((addr >> 8) & 0xff),
5426 (int)(addr & 0xff));
5427 return s;
5428}
5429#endif
5430
5431static int
5432sppp_strnlen(u_char *p, int max)
5433{
5434 int len;
5435
5436 for (len = 0; len < max && *p; ++p)
5437 ++len;
5438 return len;
5439}
5440
5441/* a dummy, used to drop uninteresting events */
5442static void
5443sppp_null(struct sppp *unused)
5444{
5445 /* do just nothing */
5446}
|