1/*-
2 * Copyright (c) 1982, 1986, 1988, 1993
3 * The Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 4. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * @(#)raw_ip.c 8.7 (Berkeley) 5/15/95
31 */
32
33#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 1982, 1986, 1988, 1993
3 * The Regents of the University of California.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 4. Neither the name of the University nor the names of its contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * @(#)raw_ip.c 8.7 (Berkeley) 5/15/95
31 */
32
33#include <sys/cdefs.h>
|
34__FBSDID("$FreeBSD: head/sys/netinet/raw_ip.c 197227 2009-09-15 19:18:34Z qingli $");
| 34__FBSDID("$FreeBSD: head/sys/netinet/raw_ip.c 197952 2009-10-11 05:59:43Z julian $");
|
35
36#include "opt_inet6.h"
37#include "opt_ipsec.h"
38
39#include <sys/param.h>
40#include <sys/jail.h>
41#include <sys/kernel.h>
42#include <sys/lock.h>
43#include <sys/malloc.h>
44#include <sys/mbuf.h>
45#include <sys/priv.h>
46#include <sys/proc.h>
47#include <sys/protosw.h>
48#include <sys/rwlock.h>
49#include <sys/signalvar.h>
50#include <sys/socket.h>
51#include <sys/socketvar.h>
52#include <sys/sx.h>
53#include <sys/sysctl.h>
54#include <sys/systm.h>
55
56#include <vm/uma.h>
57
58#include <net/if.h>
59#include <net/route.h>
60#include <net/vnet.h>
61
62#include <netinet/in.h>
63#include <netinet/in_systm.h>
64#include <netinet/in_pcb.h>
65#include <netinet/in_var.h>
66#include <netinet/ip.h>
67#include <netinet/ip_var.h>
68#include <netinet/ip_mroute.h>
69
70#ifdef IPSEC
71#include <netipsec/ipsec.h>
72#endif /*IPSEC*/
73
74#include <security/mac/mac_framework.h>
75
76VNET_DEFINE(struct inpcbhead, ripcb);
77VNET_DEFINE(struct inpcbinfo, ripcbinfo);
78
79#define V_ripcb VNET(ripcb)
80#define V_ripcbinfo VNET(ripcbinfo)
81
82/*
83 * Control and data hooks for ipfw and dummynet.
84 * The data hooks are not used here but it is convenient
85 * to keep them all in one place.
86 */
| 35
36#include "opt_inet6.h"
37#include "opt_ipsec.h"
38
39#include <sys/param.h>
40#include <sys/jail.h>
41#include <sys/kernel.h>
42#include <sys/lock.h>
43#include <sys/malloc.h>
44#include <sys/mbuf.h>
45#include <sys/priv.h>
46#include <sys/proc.h>
47#include <sys/protosw.h>
48#include <sys/rwlock.h>
49#include <sys/signalvar.h>
50#include <sys/socket.h>
51#include <sys/socketvar.h>
52#include <sys/sx.h>
53#include <sys/sysctl.h>
54#include <sys/systm.h>
55
56#include <vm/uma.h>
57
58#include <net/if.h>
59#include <net/route.h>
60#include <net/vnet.h>
61
62#include <netinet/in.h>
63#include <netinet/in_systm.h>
64#include <netinet/in_pcb.h>
65#include <netinet/in_var.h>
66#include <netinet/ip.h>
67#include <netinet/ip_var.h>
68#include <netinet/ip_mroute.h>
69
70#ifdef IPSEC
71#include <netipsec/ipsec.h>
72#endif /*IPSEC*/
73
74#include <security/mac/mac_framework.h>
75
76VNET_DEFINE(struct inpcbhead, ripcb);
77VNET_DEFINE(struct inpcbinfo, ripcbinfo);
78
79#define V_ripcb VNET(ripcb)
80#define V_ripcbinfo VNET(ripcbinfo)
81
82/*
83 * Control and data hooks for ipfw and dummynet.
84 * The data hooks are not used here but it is convenient
85 * to keep them all in one place.
86 */
|
87int (*ip_fw_ctl_ptr)(struct sockopt *) = NULL;
| 87VNET_DEFINE(ip_fw_chk_ptr_t, ip_fw_chk_ptr) = NULL;
88VNET_DEFINE(ip_fw_ctl_ptr_t, ip_fw_ctl_ptr) = NULL;
|
88int (*ip_dn_ctl_ptr)(struct sockopt *) = NULL;
| 89int (*ip_dn_ctl_ptr)(struct sockopt *) = NULL;
|
89int (*ip_fw_chk_ptr)(struct ip_fw_args *args) = NULL;
| |
90int (*ip_dn_io_ptr)(struct mbuf **m, int dir, struct ip_fw_args *fwa) = NULL;
91
92/*
93 * Hooks for multicast routing. They all default to NULL, so leave them not
94 * initialized and rely on BSS being set to 0.
95 */
96
97/*
98 * The socket used to communicate with the multicast routing daemon.
99 */
100VNET_DEFINE(struct socket *, ip_mrouter);
101
102/*
103 * The various mrouter and rsvp functions.
104 */
105int (*ip_mrouter_set)(struct socket *, struct sockopt *);
106int (*ip_mrouter_get)(struct socket *, struct sockopt *);
107int (*ip_mrouter_done)(void);
108int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
109 struct ip_moptions *);
110int (*mrt_ioctl)(u_long, caddr_t, int);
111int (*legal_vif_num)(int);
112u_long (*ip_mcast_src)(int);
113
114void (*rsvp_input_p)(struct mbuf *m, int off);
115int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
116void (*ip_rsvp_force_done)(struct socket *);
117
118/*
119 * Hash functions
120 */
121
122#define INP_PCBHASH_RAW_SIZE 256
123#define INP_PCBHASH_RAW(proto, laddr, faddr, mask) \
124 (((proto) + (laddr) + (faddr)) % (mask) + 1)
125
126static void
127rip_inshash(struct inpcb *inp)
128{
129 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
130 struct inpcbhead *pcbhash;
131 int hash;
132
133 INP_INFO_WLOCK_ASSERT(pcbinfo);
134 INP_WLOCK_ASSERT(inp);
135
136 if (inp->inp_ip_p != 0 &&
137 inp->inp_laddr.s_addr != INADDR_ANY &&
138 inp->inp_faddr.s_addr != INADDR_ANY) {
139 hash = INP_PCBHASH_RAW(inp->inp_ip_p, inp->inp_laddr.s_addr,
140 inp->inp_faddr.s_addr, pcbinfo->ipi_hashmask);
141 } else
142 hash = 0;
143 pcbhash = &pcbinfo->ipi_hashbase[hash];
144 LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
145}
146
147static void
148rip_delhash(struct inpcb *inp)
149{
150
151 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
152 INP_WLOCK_ASSERT(inp);
153
154 LIST_REMOVE(inp, inp_hash);
155}
156
157/*
158 * Raw interface to IP protocol.
159 */
160
161/*
162 * Initialize raw connection block q.
163 */
164static void
165rip_zone_change(void *tag)
166{
167
168 uma_zone_set_max(V_ripcbinfo.ipi_zone, maxsockets);
169}
170
171static int
172rip_inpcb_init(void *mem, int size, int flags)
173{
174 struct inpcb *inp = mem;
175
176 INP_LOCK_INIT(inp, "inp", "rawinp");
177 return (0);
178}
179
180void
181rip_init(void)
182{
183
184 INP_INFO_LOCK_INIT(&V_ripcbinfo, "rip");
185 LIST_INIT(&V_ripcb);
186#ifdef VIMAGE
187 V_ripcbinfo.ipi_vnet = curvnet;
188#endif
189 V_ripcbinfo.ipi_listhead = &V_ripcb;
190 V_ripcbinfo.ipi_hashbase =
191 hashinit(INP_PCBHASH_RAW_SIZE, M_PCB, &V_ripcbinfo.ipi_hashmask);
192 V_ripcbinfo.ipi_porthashbase =
193 hashinit(1, M_PCB, &V_ripcbinfo.ipi_porthashmask);
194 V_ripcbinfo.ipi_zone = uma_zcreate("ripcb", sizeof(struct inpcb),
195 NULL, NULL, rip_inpcb_init, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
196 uma_zone_set_max(V_ripcbinfo.ipi_zone, maxsockets);
197 EVENTHANDLER_REGISTER(maxsockets_change, rip_zone_change, NULL,
198 EVENTHANDLER_PRI_ANY);
199}
200
201#ifdef VIMAGE
202void
203rip_destroy(void)
204{
205
206 hashdestroy(V_ripcbinfo.ipi_hashbase, M_PCB,
207 V_ripcbinfo.ipi_hashmask);
208 hashdestroy(V_ripcbinfo.ipi_porthashbase, M_PCB,
209 V_ripcbinfo.ipi_porthashmask);
210}
211#endif
212
213static int
214rip_append(struct inpcb *last, struct ip *ip, struct mbuf *n,
215 struct sockaddr_in *ripsrc)
216{
217 int policyfail = 0;
218
219 INP_RLOCK_ASSERT(last);
220
221#ifdef IPSEC
222 /* check AH/ESP integrity. */
223 if (ipsec4_in_reject(n, last)) {
224 policyfail = 1;
225 }
226#endif /* IPSEC */
227#ifdef MAC
228 if (!policyfail && mac_inpcb_check_deliver(last, n) != 0)
229 policyfail = 1;
230#endif
231 /* Check the minimum TTL for socket. */
232 if (last->inp_ip_minttl && last->inp_ip_minttl > ip->ip_ttl)
233 policyfail = 1;
234 if (!policyfail) {
235 struct mbuf *opts = NULL;
236 struct socket *so;
237
238 so = last->inp_socket;
239 if ((last->inp_flags & INP_CONTROLOPTS) ||
240 (so->so_options & (SO_TIMESTAMP | SO_BINTIME)))
241 ip_savecontrol(last, &opts, ip, n);
242 SOCKBUF_LOCK(&so->so_rcv);
243 if (sbappendaddr_locked(&so->so_rcv,
244 (struct sockaddr *)ripsrc, n, opts) == 0) {
245 /* should notify about lost packet */
246 m_freem(n);
247 if (opts)
248 m_freem(opts);
249 SOCKBUF_UNLOCK(&so->so_rcv);
250 } else
251 sorwakeup_locked(so);
252 } else
253 m_freem(n);
254 return (policyfail);
255}
256
257/*
258 * Setup generic address and protocol structures for raw_input routine, then
259 * pass them along with mbuf chain.
260 */
261void
262rip_input(struct mbuf *m, int off)
263{
264 struct ifnet *ifp;
265 struct ip *ip = mtod(m, struct ip *);
266 int proto = ip->ip_p;
267 struct inpcb *inp, *last;
268 struct sockaddr_in ripsrc;
269 int hash;
270
271 bzero(&ripsrc, sizeof(ripsrc));
272 ripsrc.sin_len = sizeof(ripsrc);
273 ripsrc.sin_family = AF_INET;
274 ripsrc.sin_addr = ip->ip_src;
275 last = NULL;
276
277 ifp = m->m_pkthdr.rcvif;
278
279 hash = INP_PCBHASH_RAW(proto, ip->ip_src.s_addr,
280 ip->ip_dst.s_addr, V_ripcbinfo.ipi_hashmask);
281 INP_INFO_RLOCK(&V_ripcbinfo);
282 LIST_FOREACH(inp, &V_ripcbinfo.ipi_hashbase[hash], inp_hash) {
283 if (inp->inp_ip_p != proto)
284 continue;
285#ifdef INET6
286 /* XXX inp locking */
287 if ((inp->inp_vflag & INP_IPV4) == 0)
288 continue;
289#endif
290 if (inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
291 continue;
292 if (inp->inp_faddr.s_addr != ip->ip_src.s_addr)
293 continue;
294 if (jailed(inp->inp_cred)) {
295 /*
296 * XXX: If faddr was bound to multicast group,
297 * jailed raw socket will drop datagram.
298 */
299 if (prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0)
300 continue;
301 }
302 if (last != NULL) {
303 struct mbuf *n;
304
305 n = m_copy(m, 0, (int)M_COPYALL);
306 if (n != NULL)
307 (void) rip_append(last, ip, n, &ripsrc);
308 /* XXX count dropped packet */
309 INP_RUNLOCK(last);
310 }
311 INP_RLOCK(inp);
312 last = inp;
313 }
314 LIST_FOREACH(inp, &V_ripcbinfo.ipi_hashbase[0], inp_hash) {
315 if (inp->inp_ip_p && inp->inp_ip_p != proto)
316 continue;
317#ifdef INET6
318 /* XXX inp locking */
319 if ((inp->inp_vflag & INP_IPV4) == 0)
320 continue;
321#endif
322 if (!in_nullhost(inp->inp_laddr) &&
323 !in_hosteq(inp->inp_laddr, ip->ip_dst))
324 continue;
325 if (!in_nullhost(inp->inp_faddr) &&
326 !in_hosteq(inp->inp_faddr, ip->ip_src))
327 continue;
328 if (jailed(inp->inp_cred)) {
329 /*
330 * Allow raw socket in jail to receive multicast;
331 * assume process had PRIV_NETINET_RAW at attach,
332 * and fall through into normal filter path if so.
333 */
334 if (!IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) &&
335 prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0)
336 continue;
337 }
338 /*
339 * If this raw socket has multicast state, and we
340 * have received a multicast, check if this socket
341 * should receive it, as multicast filtering is now
342 * the responsibility of the transport layer.
343 */
344 if (inp->inp_moptions != NULL &&
345 IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
346 struct sockaddr_in group;
347 int blocked;
348
349 bzero(&group, sizeof(struct sockaddr_in));
350 group.sin_len = sizeof(struct sockaddr_in);
351 group.sin_family = AF_INET;
352 group.sin_addr = ip->ip_dst;
353
354 blocked = imo_multi_filter(inp->inp_moptions, ifp,
355 (struct sockaddr *)&group,
356 (struct sockaddr *)&ripsrc);
357 if (blocked != MCAST_PASS) {
358 IPSTAT_INC(ips_notmember);
359 continue;
360 }
361 }
362 if (last != NULL) {
363 struct mbuf *n;
364
365 n = m_copy(m, 0, (int)M_COPYALL);
366 if (n != NULL)
367 (void) rip_append(last, ip, n, &ripsrc);
368 /* XXX count dropped packet */
369 INP_RUNLOCK(last);
370 }
371 INP_RLOCK(inp);
372 last = inp;
373 }
374 INP_INFO_RUNLOCK(&V_ripcbinfo);
375 if (last != NULL) {
376 if (rip_append(last, ip, m, &ripsrc) != 0)
377 IPSTAT_INC(ips_delivered);
378 INP_RUNLOCK(last);
379 } else {
380 m_freem(m);
381 IPSTAT_INC(ips_noproto);
382 IPSTAT_DEC(ips_delivered);
383 }
384}
385
386/*
387 * Generate IP header and pass packet to ip_output. Tack on options user may
388 * have setup with control call.
389 */
390int
391rip_output(struct mbuf *m, struct socket *so, u_long dst)
392{
393 struct ip *ip;
394 int error;
395 struct inpcb *inp = sotoinpcb(so);
396 int flags = ((so->so_options & SO_DONTROUTE) ? IP_ROUTETOIF : 0) |
397 IP_ALLOWBROADCAST;
398
399 /*
400 * If the user handed us a complete IP packet, use it. Otherwise,
401 * allocate an mbuf for a header and fill it in.
402 */
403 if ((inp->inp_flags & INP_HDRINCL) == 0) {
404 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
405 m_freem(m);
406 return(EMSGSIZE);
407 }
408 M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
409 if (m == NULL)
410 return(ENOBUFS);
411
412 INP_RLOCK(inp);
413 ip = mtod(m, struct ip *);
414 ip->ip_tos = inp->inp_ip_tos;
415 if (inp->inp_flags & INP_DONTFRAG)
416 ip->ip_off = IP_DF;
417 else
418 ip->ip_off = 0;
419 ip->ip_p = inp->inp_ip_p;
420 ip->ip_len = m->m_pkthdr.len;
421 ip->ip_src = inp->inp_laddr;
422 error = prison_get_ip4(inp->inp_cred, &ip->ip_src);
423 if (error != 0) {
424 INP_RUNLOCK(inp);
425 m_freem(m);
426 return (error);
427 }
428 ip->ip_dst.s_addr = dst;
429 ip->ip_ttl = inp->inp_ip_ttl;
430 } else {
431 if (m->m_pkthdr.len > IP_MAXPACKET) {
432 m_freem(m);
433 return(EMSGSIZE);
434 }
435 INP_RLOCK(inp);
436 ip = mtod(m, struct ip *);
437 error = prison_check_ip4(inp->inp_cred, &ip->ip_src);
438 if (error != 0) {
439 INP_RUNLOCK(inp);
440 m_freem(m);
441 return (error);
442 }
443
444 /*
445 * Don't allow both user specified and setsockopt options,
446 * and don't allow packet length sizes that will crash.
447 */
448 if (((ip->ip_hl != (sizeof (*ip) >> 2)) && inp->inp_options)
449 || (ip->ip_len > m->m_pkthdr.len)
450 || (ip->ip_len < (ip->ip_hl << 2))) {
451 INP_RUNLOCK(inp);
452 m_freem(m);
453 return (EINVAL);
454 }
455 if (ip->ip_id == 0)
456 ip->ip_id = ip_newid();
457
458 /*
459 * XXX prevent ip_output from overwriting header fields.
460 */
461 flags |= IP_RAWOUTPUT;
462 IPSTAT_INC(ips_rawout);
463 }
464
465 if (inp->inp_flags & INP_ONESBCAST)
466 flags |= IP_SENDONES;
467
468#ifdef MAC
469 mac_inpcb_create_mbuf(inp, m);
470#endif
471
472 error = ip_output(m, inp->inp_options, NULL, flags,
473 inp->inp_moptions, inp);
474 INP_RUNLOCK(inp);
475 return (error);
476}
477
478/*
479 * Raw IP socket option processing.
480 *
481 * IMPORTANT NOTE regarding access control: Traditionally, raw sockets could
482 * only be created by a privileged process, and as such, socket option
483 * operations to manage system properties on any raw socket were allowed to
484 * take place without explicit additional access control checks. However,
485 * raw sockets can now also be created in jail(), and therefore explicit
486 * checks are now required. Likewise, raw sockets can be used by a process
487 * after it gives up privilege, so some caution is required. For options
488 * passed down to the IP layer via ip_ctloutput(), checks are assumed to be
489 * performed in ip_ctloutput() and therefore no check occurs here.
490 * Unilaterally checking priv_check() here breaks normal IP socket option
491 * operations on raw sockets.
492 *
493 * When adding new socket options here, make sure to add access control
494 * checks here as necessary.
495 */
496int
497rip_ctloutput(struct socket *so, struct sockopt *sopt)
498{
499 struct inpcb *inp = sotoinpcb(so);
500 int error, optval;
501
502 if (sopt->sopt_level != IPPROTO_IP) {
503 if ((sopt->sopt_level == SOL_SOCKET) &&
504 (sopt->sopt_name == SO_SETFIB)) {
505 inp->inp_inc.inc_fibnum = so->so_fibnum;
506 return (0);
507 }
508 return (EINVAL);
509 }
510
511 error = 0;
512 switch (sopt->sopt_dir) {
513 case SOPT_GET:
514 switch (sopt->sopt_name) {
515 case IP_HDRINCL:
516 optval = inp->inp_flags & INP_HDRINCL;
517 error = sooptcopyout(sopt, &optval, sizeof optval);
518 break;
519
520 case IP_FW_ADD: /* ADD actually returns the body... */
521 case IP_FW_GET:
522 case IP_FW_TABLE_GETSIZE:
523 case IP_FW_TABLE_LIST:
524 case IP_FW_NAT_GET_CONFIG:
525 case IP_FW_NAT_GET_LOG:
| 90int (*ip_dn_io_ptr)(struct mbuf **m, int dir, struct ip_fw_args *fwa) = NULL;
91
92/*
93 * Hooks for multicast routing. They all default to NULL, so leave them not
94 * initialized and rely on BSS being set to 0.
95 */
96
97/*
98 * The socket used to communicate with the multicast routing daemon.
99 */
100VNET_DEFINE(struct socket *, ip_mrouter);
101
102/*
103 * The various mrouter and rsvp functions.
104 */
105int (*ip_mrouter_set)(struct socket *, struct sockopt *);
106int (*ip_mrouter_get)(struct socket *, struct sockopt *);
107int (*ip_mrouter_done)(void);
108int (*ip_mforward)(struct ip *, struct ifnet *, struct mbuf *,
109 struct ip_moptions *);
110int (*mrt_ioctl)(u_long, caddr_t, int);
111int (*legal_vif_num)(int);
112u_long (*ip_mcast_src)(int);
113
114void (*rsvp_input_p)(struct mbuf *m, int off);
115int (*ip_rsvp_vif)(struct socket *, struct sockopt *);
116void (*ip_rsvp_force_done)(struct socket *);
117
118/*
119 * Hash functions
120 */
121
122#define INP_PCBHASH_RAW_SIZE 256
123#define INP_PCBHASH_RAW(proto, laddr, faddr, mask) \
124 (((proto) + (laddr) + (faddr)) % (mask) + 1)
125
126static void
127rip_inshash(struct inpcb *inp)
128{
129 struct inpcbinfo *pcbinfo = inp->inp_pcbinfo;
130 struct inpcbhead *pcbhash;
131 int hash;
132
133 INP_INFO_WLOCK_ASSERT(pcbinfo);
134 INP_WLOCK_ASSERT(inp);
135
136 if (inp->inp_ip_p != 0 &&
137 inp->inp_laddr.s_addr != INADDR_ANY &&
138 inp->inp_faddr.s_addr != INADDR_ANY) {
139 hash = INP_PCBHASH_RAW(inp->inp_ip_p, inp->inp_laddr.s_addr,
140 inp->inp_faddr.s_addr, pcbinfo->ipi_hashmask);
141 } else
142 hash = 0;
143 pcbhash = &pcbinfo->ipi_hashbase[hash];
144 LIST_INSERT_HEAD(pcbhash, inp, inp_hash);
145}
146
147static void
148rip_delhash(struct inpcb *inp)
149{
150
151 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
152 INP_WLOCK_ASSERT(inp);
153
154 LIST_REMOVE(inp, inp_hash);
155}
156
157/*
158 * Raw interface to IP protocol.
159 */
160
161/*
162 * Initialize raw connection block q.
163 */
164static void
165rip_zone_change(void *tag)
166{
167
168 uma_zone_set_max(V_ripcbinfo.ipi_zone, maxsockets);
169}
170
171static int
172rip_inpcb_init(void *mem, int size, int flags)
173{
174 struct inpcb *inp = mem;
175
176 INP_LOCK_INIT(inp, "inp", "rawinp");
177 return (0);
178}
179
180void
181rip_init(void)
182{
183
184 INP_INFO_LOCK_INIT(&V_ripcbinfo, "rip");
185 LIST_INIT(&V_ripcb);
186#ifdef VIMAGE
187 V_ripcbinfo.ipi_vnet = curvnet;
188#endif
189 V_ripcbinfo.ipi_listhead = &V_ripcb;
190 V_ripcbinfo.ipi_hashbase =
191 hashinit(INP_PCBHASH_RAW_SIZE, M_PCB, &V_ripcbinfo.ipi_hashmask);
192 V_ripcbinfo.ipi_porthashbase =
193 hashinit(1, M_PCB, &V_ripcbinfo.ipi_porthashmask);
194 V_ripcbinfo.ipi_zone = uma_zcreate("ripcb", sizeof(struct inpcb),
195 NULL, NULL, rip_inpcb_init, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
196 uma_zone_set_max(V_ripcbinfo.ipi_zone, maxsockets);
197 EVENTHANDLER_REGISTER(maxsockets_change, rip_zone_change, NULL,
198 EVENTHANDLER_PRI_ANY);
199}
200
201#ifdef VIMAGE
202void
203rip_destroy(void)
204{
205
206 hashdestroy(V_ripcbinfo.ipi_hashbase, M_PCB,
207 V_ripcbinfo.ipi_hashmask);
208 hashdestroy(V_ripcbinfo.ipi_porthashbase, M_PCB,
209 V_ripcbinfo.ipi_porthashmask);
210}
211#endif
212
213static int
214rip_append(struct inpcb *last, struct ip *ip, struct mbuf *n,
215 struct sockaddr_in *ripsrc)
216{
217 int policyfail = 0;
218
219 INP_RLOCK_ASSERT(last);
220
221#ifdef IPSEC
222 /* check AH/ESP integrity. */
223 if (ipsec4_in_reject(n, last)) {
224 policyfail = 1;
225 }
226#endif /* IPSEC */
227#ifdef MAC
228 if (!policyfail && mac_inpcb_check_deliver(last, n) != 0)
229 policyfail = 1;
230#endif
231 /* Check the minimum TTL for socket. */
232 if (last->inp_ip_minttl && last->inp_ip_minttl > ip->ip_ttl)
233 policyfail = 1;
234 if (!policyfail) {
235 struct mbuf *opts = NULL;
236 struct socket *so;
237
238 so = last->inp_socket;
239 if ((last->inp_flags & INP_CONTROLOPTS) ||
240 (so->so_options & (SO_TIMESTAMP | SO_BINTIME)))
241 ip_savecontrol(last, &opts, ip, n);
242 SOCKBUF_LOCK(&so->so_rcv);
243 if (sbappendaddr_locked(&so->so_rcv,
244 (struct sockaddr *)ripsrc, n, opts) == 0) {
245 /* should notify about lost packet */
246 m_freem(n);
247 if (opts)
248 m_freem(opts);
249 SOCKBUF_UNLOCK(&so->so_rcv);
250 } else
251 sorwakeup_locked(so);
252 } else
253 m_freem(n);
254 return (policyfail);
255}
256
257/*
258 * Setup generic address and protocol structures for raw_input routine, then
259 * pass them along with mbuf chain.
260 */
261void
262rip_input(struct mbuf *m, int off)
263{
264 struct ifnet *ifp;
265 struct ip *ip = mtod(m, struct ip *);
266 int proto = ip->ip_p;
267 struct inpcb *inp, *last;
268 struct sockaddr_in ripsrc;
269 int hash;
270
271 bzero(&ripsrc, sizeof(ripsrc));
272 ripsrc.sin_len = sizeof(ripsrc);
273 ripsrc.sin_family = AF_INET;
274 ripsrc.sin_addr = ip->ip_src;
275 last = NULL;
276
277 ifp = m->m_pkthdr.rcvif;
278
279 hash = INP_PCBHASH_RAW(proto, ip->ip_src.s_addr,
280 ip->ip_dst.s_addr, V_ripcbinfo.ipi_hashmask);
281 INP_INFO_RLOCK(&V_ripcbinfo);
282 LIST_FOREACH(inp, &V_ripcbinfo.ipi_hashbase[hash], inp_hash) {
283 if (inp->inp_ip_p != proto)
284 continue;
285#ifdef INET6
286 /* XXX inp locking */
287 if ((inp->inp_vflag & INP_IPV4) == 0)
288 continue;
289#endif
290 if (inp->inp_laddr.s_addr != ip->ip_dst.s_addr)
291 continue;
292 if (inp->inp_faddr.s_addr != ip->ip_src.s_addr)
293 continue;
294 if (jailed(inp->inp_cred)) {
295 /*
296 * XXX: If faddr was bound to multicast group,
297 * jailed raw socket will drop datagram.
298 */
299 if (prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0)
300 continue;
301 }
302 if (last != NULL) {
303 struct mbuf *n;
304
305 n = m_copy(m, 0, (int)M_COPYALL);
306 if (n != NULL)
307 (void) rip_append(last, ip, n, &ripsrc);
308 /* XXX count dropped packet */
309 INP_RUNLOCK(last);
310 }
311 INP_RLOCK(inp);
312 last = inp;
313 }
314 LIST_FOREACH(inp, &V_ripcbinfo.ipi_hashbase[0], inp_hash) {
315 if (inp->inp_ip_p && inp->inp_ip_p != proto)
316 continue;
317#ifdef INET6
318 /* XXX inp locking */
319 if ((inp->inp_vflag & INP_IPV4) == 0)
320 continue;
321#endif
322 if (!in_nullhost(inp->inp_laddr) &&
323 !in_hosteq(inp->inp_laddr, ip->ip_dst))
324 continue;
325 if (!in_nullhost(inp->inp_faddr) &&
326 !in_hosteq(inp->inp_faddr, ip->ip_src))
327 continue;
328 if (jailed(inp->inp_cred)) {
329 /*
330 * Allow raw socket in jail to receive multicast;
331 * assume process had PRIV_NETINET_RAW at attach,
332 * and fall through into normal filter path if so.
333 */
334 if (!IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) &&
335 prison_check_ip4(inp->inp_cred, &ip->ip_dst) != 0)
336 continue;
337 }
338 /*
339 * If this raw socket has multicast state, and we
340 * have received a multicast, check if this socket
341 * should receive it, as multicast filtering is now
342 * the responsibility of the transport layer.
343 */
344 if (inp->inp_moptions != NULL &&
345 IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
346 struct sockaddr_in group;
347 int blocked;
348
349 bzero(&group, sizeof(struct sockaddr_in));
350 group.sin_len = sizeof(struct sockaddr_in);
351 group.sin_family = AF_INET;
352 group.sin_addr = ip->ip_dst;
353
354 blocked = imo_multi_filter(inp->inp_moptions, ifp,
355 (struct sockaddr *)&group,
356 (struct sockaddr *)&ripsrc);
357 if (blocked != MCAST_PASS) {
358 IPSTAT_INC(ips_notmember);
359 continue;
360 }
361 }
362 if (last != NULL) {
363 struct mbuf *n;
364
365 n = m_copy(m, 0, (int)M_COPYALL);
366 if (n != NULL)
367 (void) rip_append(last, ip, n, &ripsrc);
368 /* XXX count dropped packet */
369 INP_RUNLOCK(last);
370 }
371 INP_RLOCK(inp);
372 last = inp;
373 }
374 INP_INFO_RUNLOCK(&V_ripcbinfo);
375 if (last != NULL) {
376 if (rip_append(last, ip, m, &ripsrc) != 0)
377 IPSTAT_INC(ips_delivered);
378 INP_RUNLOCK(last);
379 } else {
380 m_freem(m);
381 IPSTAT_INC(ips_noproto);
382 IPSTAT_DEC(ips_delivered);
383 }
384}
385
386/*
387 * Generate IP header and pass packet to ip_output. Tack on options user may
388 * have setup with control call.
389 */
390int
391rip_output(struct mbuf *m, struct socket *so, u_long dst)
392{
393 struct ip *ip;
394 int error;
395 struct inpcb *inp = sotoinpcb(so);
396 int flags = ((so->so_options & SO_DONTROUTE) ? IP_ROUTETOIF : 0) |
397 IP_ALLOWBROADCAST;
398
399 /*
400 * If the user handed us a complete IP packet, use it. Otherwise,
401 * allocate an mbuf for a header and fill it in.
402 */
403 if ((inp->inp_flags & INP_HDRINCL) == 0) {
404 if (m->m_pkthdr.len + sizeof(struct ip) > IP_MAXPACKET) {
405 m_freem(m);
406 return(EMSGSIZE);
407 }
408 M_PREPEND(m, sizeof(struct ip), M_DONTWAIT);
409 if (m == NULL)
410 return(ENOBUFS);
411
412 INP_RLOCK(inp);
413 ip = mtod(m, struct ip *);
414 ip->ip_tos = inp->inp_ip_tos;
415 if (inp->inp_flags & INP_DONTFRAG)
416 ip->ip_off = IP_DF;
417 else
418 ip->ip_off = 0;
419 ip->ip_p = inp->inp_ip_p;
420 ip->ip_len = m->m_pkthdr.len;
421 ip->ip_src = inp->inp_laddr;
422 error = prison_get_ip4(inp->inp_cred, &ip->ip_src);
423 if (error != 0) {
424 INP_RUNLOCK(inp);
425 m_freem(m);
426 return (error);
427 }
428 ip->ip_dst.s_addr = dst;
429 ip->ip_ttl = inp->inp_ip_ttl;
430 } else {
431 if (m->m_pkthdr.len > IP_MAXPACKET) {
432 m_freem(m);
433 return(EMSGSIZE);
434 }
435 INP_RLOCK(inp);
436 ip = mtod(m, struct ip *);
437 error = prison_check_ip4(inp->inp_cred, &ip->ip_src);
438 if (error != 0) {
439 INP_RUNLOCK(inp);
440 m_freem(m);
441 return (error);
442 }
443
444 /*
445 * Don't allow both user specified and setsockopt options,
446 * and don't allow packet length sizes that will crash.
447 */
448 if (((ip->ip_hl != (sizeof (*ip) >> 2)) && inp->inp_options)
449 || (ip->ip_len > m->m_pkthdr.len)
450 || (ip->ip_len < (ip->ip_hl << 2))) {
451 INP_RUNLOCK(inp);
452 m_freem(m);
453 return (EINVAL);
454 }
455 if (ip->ip_id == 0)
456 ip->ip_id = ip_newid();
457
458 /*
459 * XXX prevent ip_output from overwriting header fields.
460 */
461 flags |= IP_RAWOUTPUT;
462 IPSTAT_INC(ips_rawout);
463 }
464
465 if (inp->inp_flags & INP_ONESBCAST)
466 flags |= IP_SENDONES;
467
468#ifdef MAC
469 mac_inpcb_create_mbuf(inp, m);
470#endif
471
472 error = ip_output(m, inp->inp_options, NULL, flags,
473 inp->inp_moptions, inp);
474 INP_RUNLOCK(inp);
475 return (error);
476}
477
478/*
479 * Raw IP socket option processing.
480 *
481 * IMPORTANT NOTE regarding access control: Traditionally, raw sockets could
482 * only be created by a privileged process, and as such, socket option
483 * operations to manage system properties on any raw socket were allowed to
484 * take place without explicit additional access control checks. However,
485 * raw sockets can now also be created in jail(), and therefore explicit
486 * checks are now required. Likewise, raw sockets can be used by a process
487 * after it gives up privilege, so some caution is required. For options
488 * passed down to the IP layer via ip_ctloutput(), checks are assumed to be
489 * performed in ip_ctloutput() and therefore no check occurs here.
490 * Unilaterally checking priv_check() here breaks normal IP socket option
491 * operations on raw sockets.
492 *
493 * When adding new socket options here, make sure to add access control
494 * checks here as necessary.
495 */
496int
497rip_ctloutput(struct socket *so, struct sockopt *sopt)
498{
499 struct inpcb *inp = sotoinpcb(so);
500 int error, optval;
501
502 if (sopt->sopt_level != IPPROTO_IP) {
503 if ((sopt->sopt_level == SOL_SOCKET) &&
504 (sopt->sopt_name == SO_SETFIB)) {
505 inp->inp_inc.inc_fibnum = so->so_fibnum;
506 return (0);
507 }
508 return (EINVAL);
509 }
510
511 error = 0;
512 switch (sopt->sopt_dir) {
513 case SOPT_GET:
514 switch (sopt->sopt_name) {
515 case IP_HDRINCL:
516 optval = inp->inp_flags & INP_HDRINCL;
517 error = sooptcopyout(sopt, &optval, sizeof optval);
518 break;
519
520 case IP_FW_ADD: /* ADD actually returns the body... */
521 case IP_FW_GET:
522 case IP_FW_TABLE_GETSIZE:
523 case IP_FW_TABLE_LIST:
524 case IP_FW_NAT_GET_CONFIG:
525 case IP_FW_NAT_GET_LOG:
|
526 if (ip_fw_ctl_ptr != NULL)
527 error = ip_fw_ctl_ptr(sopt);
| 526 if (V_ip_fw_ctl_ptr != NULL)
527 error = V_ip_fw_ctl_ptr(sopt);
|
528 else
529 error = ENOPROTOOPT;
530 break;
531
532 case IP_DUMMYNET_GET:
533 if (ip_dn_ctl_ptr != NULL)
534 error = ip_dn_ctl_ptr(sopt);
535 else
536 error = ENOPROTOOPT;
537 break ;
538
539 case MRT_INIT:
540 case MRT_DONE:
541 case MRT_ADD_VIF:
542 case MRT_DEL_VIF:
543 case MRT_ADD_MFC:
544 case MRT_DEL_MFC:
545 case MRT_VERSION:
546 case MRT_ASSERT:
547 case MRT_API_SUPPORT:
548 case MRT_API_CONFIG:
549 case MRT_ADD_BW_UPCALL:
550 case MRT_DEL_BW_UPCALL:
551 error = priv_check(curthread, PRIV_NETINET_MROUTE);
552 if (error != 0)
553 return (error);
554 error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
555 EOPNOTSUPP;
556 break;
557
558 default:
559 error = ip_ctloutput(so, sopt);
560 break;
561 }
562 break;
563
564 case SOPT_SET:
565 switch (sopt->sopt_name) {
566 case IP_HDRINCL:
567 error = sooptcopyin(sopt, &optval, sizeof optval,
568 sizeof optval);
569 if (error)
570 break;
571 if (optval)
572 inp->inp_flags |= INP_HDRINCL;
573 else
574 inp->inp_flags &= ~INP_HDRINCL;
575 break;
576
577 case IP_FW_ADD:
578 case IP_FW_DEL:
579 case IP_FW_FLUSH:
580 case IP_FW_ZERO:
581 case IP_FW_RESETLOG:
582 case IP_FW_TABLE_ADD:
583 case IP_FW_TABLE_DEL:
584 case IP_FW_TABLE_FLUSH:
585 case IP_FW_NAT_CFG:
586 case IP_FW_NAT_DEL:
| 528 else
529 error = ENOPROTOOPT;
530 break;
531
532 case IP_DUMMYNET_GET:
533 if (ip_dn_ctl_ptr != NULL)
534 error = ip_dn_ctl_ptr(sopt);
535 else
536 error = ENOPROTOOPT;
537 break ;
538
539 case MRT_INIT:
540 case MRT_DONE:
541 case MRT_ADD_VIF:
542 case MRT_DEL_VIF:
543 case MRT_ADD_MFC:
544 case MRT_DEL_MFC:
545 case MRT_VERSION:
546 case MRT_ASSERT:
547 case MRT_API_SUPPORT:
548 case MRT_API_CONFIG:
549 case MRT_ADD_BW_UPCALL:
550 case MRT_DEL_BW_UPCALL:
551 error = priv_check(curthread, PRIV_NETINET_MROUTE);
552 if (error != 0)
553 return (error);
554 error = ip_mrouter_get ? ip_mrouter_get(so, sopt) :
555 EOPNOTSUPP;
556 break;
557
558 default:
559 error = ip_ctloutput(so, sopt);
560 break;
561 }
562 break;
563
564 case SOPT_SET:
565 switch (sopt->sopt_name) {
566 case IP_HDRINCL:
567 error = sooptcopyin(sopt, &optval, sizeof optval,
568 sizeof optval);
569 if (error)
570 break;
571 if (optval)
572 inp->inp_flags |= INP_HDRINCL;
573 else
574 inp->inp_flags &= ~INP_HDRINCL;
575 break;
576
577 case IP_FW_ADD:
578 case IP_FW_DEL:
579 case IP_FW_FLUSH:
580 case IP_FW_ZERO:
581 case IP_FW_RESETLOG:
582 case IP_FW_TABLE_ADD:
583 case IP_FW_TABLE_DEL:
584 case IP_FW_TABLE_FLUSH:
585 case IP_FW_NAT_CFG:
586 case IP_FW_NAT_DEL:
|
587 if (ip_fw_ctl_ptr != NULL)
588 error = ip_fw_ctl_ptr(sopt);
| 587 if (V_ip_fw_ctl_ptr != NULL)
588 error = V_ip_fw_ctl_ptr(sopt);
|
589 else
590 error = ENOPROTOOPT;
591 break;
592
593 case IP_DUMMYNET_CONFIGURE:
594 case IP_DUMMYNET_DEL:
595 case IP_DUMMYNET_FLUSH:
596 if (ip_dn_ctl_ptr != NULL)
597 error = ip_dn_ctl_ptr(sopt);
598 else
599 error = ENOPROTOOPT ;
600 break ;
601
602 case IP_RSVP_ON:
603 error = priv_check(curthread, PRIV_NETINET_MROUTE);
604 if (error != 0)
605 return (error);
606 error = ip_rsvp_init(so);
607 break;
608
609 case IP_RSVP_OFF:
610 error = priv_check(curthread, PRIV_NETINET_MROUTE);
611 if (error != 0)
612 return (error);
613 error = ip_rsvp_done();
614 break;
615
616 case IP_RSVP_VIF_ON:
617 case IP_RSVP_VIF_OFF:
618 error = priv_check(curthread, PRIV_NETINET_MROUTE);
619 if (error != 0)
620 return (error);
621 error = ip_rsvp_vif ?
622 ip_rsvp_vif(so, sopt) : EINVAL;
623 break;
624
625 case MRT_INIT:
626 case MRT_DONE:
627 case MRT_ADD_VIF:
628 case MRT_DEL_VIF:
629 case MRT_ADD_MFC:
630 case MRT_DEL_MFC:
631 case MRT_VERSION:
632 case MRT_ASSERT:
633 case MRT_API_SUPPORT:
634 case MRT_API_CONFIG:
635 case MRT_ADD_BW_UPCALL:
636 case MRT_DEL_BW_UPCALL:
637 error = priv_check(curthread, PRIV_NETINET_MROUTE);
638 if (error != 0)
639 return (error);
640 error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
641 EOPNOTSUPP;
642 break;
643
644 default:
645 error = ip_ctloutput(so, sopt);
646 break;
647 }
648 break;
649 }
650
651 return (error);
652}
653
654/*
655 * This function exists solely to receive the PRC_IFDOWN messages which are
656 * sent by if_down(). It looks for an ifaddr whose ifa_addr is sa, and calls
657 * in_ifadown() to remove all routes corresponding to that address. It also
658 * receives the PRC_IFUP messages from if_up() and reinstalls the interface
659 * routes.
660 */
661void
662rip_ctlinput(int cmd, struct sockaddr *sa, void *vip)
663{
664 struct in_ifaddr *ia;
665 struct ifnet *ifp;
666 int err;
667 int flags;
668
669 switch (cmd) {
670 case PRC_IFDOWN:
671 IN_IFADDR_RLOCK();
672 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
673 if (ia->ia_ifa.ifa_addr == sa
674 && (ia->ia_flags & IFA_ROUTE)) {
675 ifa_ref(&ia->ia_ifa);
676 IN_IFADDR_RUNLOCK();
677 /*
678 * in_ifscrub kills the interface route.
679 */
680 in_ifscrub(ia->ia_ifp, ia);
681 /*
682 * in_ifadown gets rid of all the rest of the
683 * routes. This is not quite the right thing
684 * to do, but at least if we are running a
685 * routing process they will come back.
686 */
687 in_ifadown(&ia->ia_ifa, 0);
688 ifa_free(&ia->ia_ifa);
689 break;
690 }
691 }
692 if (ia == NULL) /* If ia matched, already unlocked. */
693 IN_IFADDR_RUNLOCK();
694 break;
695
696 case PRC_IFUP:
697 IN_IFADDR_RLOCK();
698 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
699 if (ia->ia_ifa.ifa_addr == sa)
700 break;
701 }
702 if (ia == NULL || (ia->ia_flags & IFA_ROUTE)) {
703 IN_IFADDR_RUNLOCK();
704 return;
705 }
706 ifa_ref(&ia->ia_ifa);
707 IN_IFADDR_RUNLOCK();
708 flags = RTF_UP;
709 ifp = ia->ia_ifa.ifa_ifp;
710
711 if ((ifp->if_flags & IFF_LOOPBACK)
712 || (ifp->if_flags & IFF_POINTOPOINT))
713 flags |= RTF_HOST;
714
715 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
716 if (err == 0)
717 ia->ia_flags |= IFA_ROUTE;
718 err = ifa_add_loopback_route((struct ifaddr *)ia, sa);
719 ifa_free(&ia->ia_ifa);
720 break;
721 }
722}
723
724u_long rip_sendspace = 9216;
725u_long rip_recvspace = 9216;
726
727SYSCTL_ULONG(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
728 &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
729SYSCTL_ULONG(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
730 &rip_recvspace, 0, "Maximum space for incoming raw IP datagrams");
731
732static int
733rip_attach(struct socket *so, int proto, struct thread *td)
734{
735 struct inpcb *inp;
736 int error;
737
738 inp = sotoinpcb(so);
739 KASSERT(inp == NULL, ("rip_attach: inp != NULL"));
740
741 error = priv_check(td, PRIV_NETINET_RAW);
742 if (error)
743 return (error);
744 if (proto >= IPPROTO_MAX || proto < 0)
745 return EPROTONOSUPPORT;
746 error = soreserve(so, rip_sendspace, rip_recvspace);
747 if (error)
748 return (error);
749 INP_INFO_WLOCK(&V_ripcbinfo);
750 error = in_pcballoc(so, &V_ripcbinfo);
751 if (error) {
752 INP_INFO_WUNLOCK(&V_ripcbinfo);
753 return (error);
754 }
755 inp = (struct inpcb *)so->so_pcb;
756 inp->inp_vflag |= INP_IPV4;
757 inp->inp_ip_p = proto;
758 inp->inp_ip_ttl = V_ip_defttl;
759 rip_inshash(inp);
760 INP_INFO_WUNLOCK(&V_ripcbinfo);
761 INP_WUNLOCK(inp);
762 return (0);
763}
764
765static void
766rip_detach(struct socket *so)
767{
768 struct inpcb *inp;
769
770 inp = sotoinpcb(so);
771 KASSERT(inp != NULL, ("rip_detach: inp == NULL"));
772 KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
773 ("rip_detach: not closed"));
774
775 INP_INFO_WLOCK(&V_ripcbinfo);
776 INP_WLOCK(inp);
777 rip_delhash(inp);
778 if (so == V_ip_mrouter && ip_mrouter_done)
779 ip_mrouter_done();
780 if (ip_rsvp_force_done)
781 ip_rsvp_force_done(so);
782 if (so == V_ip_rsvpd)
783 ip_rsvp_done();
784 in_pcbdetach(inp);
785 in_pcbfree(inp);
786 INP_INFO_WUNLOCK(&V_ripcbinfo);
787}
788
789static void
790rip_dodisconnect(struct socket *so, struct inpcb *inp)
791{
792
793 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
794 INP_WLOCK_ASSERT(inp);
795
796 rip_delhash(inp);
797 inp->inp_faddr.s_addr = INADDR_ANY;
798 rip_inshash(inp);
799 SOCK_LOCK(so);
800 so->so_state &= ~SS_ISCONNECTED;
801 SOCK_UNLOCK(so);
802}
803
804static void
805rip_abort(struct socket *so)
806{
807 struct inpcb *inp;
808
809 inp = sotoinpcb(so);
810 KASSERT(inp != NULL, ("rip_abort: inp == NULL"));
811
812 INP_INFO_WLOCK(&V_ripcbinfo);
813 INP_WLOCK(inp);
814 rip_dodisconnect(so, inp);
815 INP_WUNLOCK(inp);
816 INP_INFO_WUNLOCK(&V_ripcbinfo);
817}
818
819static void
820rip_close(struct socket *so)
821{
822 struct inpcb *inp;
823
824 inp = sotoinpcb(so);
825 KASSERT(inp != NULL, ("rip_close: inp == NULL"));
826
827 INP_INFO_WLOCK(&V_ripcbinfo);
828 INP_WLOCK(inp);
829 rip_dodisconnect(so, inp);
830 INP_WUNLOCK(inp);
831 INP_INFO_WUNLOCK(&V_ripcbinfo);
832}
833
834static int
835rip_disconnect(struct socket *so)
836{
837 struct inpcb *inp;
838
839 if ((so->so_state & SS_ISCONNECTED) == 0)
840 return (ENOTCONN);
841
842 inp = sotoinpcb(so);
843 KASSERT(inp != NULL, ("rip_disconnect: inp == NULL"));
844
845 INP_INFO_WLOCK(&V_ripcbinfo);
846 INP_WLOCK(inp);
847 rip_dodisconnect(so, inp);
848 INP_WUNLOCK(inp);
849 INP_INFO_WUNLOCK(&V_ripcbinfo);
850 return (0);
851}
852
853static int
854rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
855{
856 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
857 struct inpcb *inp;
858 int error;
859
860 if (nam->sa_len != sizeof(*addr))
861 return (EINVAL);
862
863 error = prison_check_ip4(td->td_ucred, &addr->sin_addr);
864 if (error != 0)
865 return (error);
866
867 inp = sotoinpcb(so);
868 KASSERT(inp != NULL, ("rip_bind: inp == NULL"));
869
870 if (TAILQ_EMPTY(&V_ifnet) ||
871 (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) ||
872 (addr->sin_addr.s_addr &&
873 (inp->inp_flags & INP_BINDANY) == 0 &&
874 ifa_ifwithaddr_check((struct sockaddr *)addr) == 0))
875 return (EADDRNOTAVAIL);
876
877 INP_INFO_WLOCK(&V_ripcbinfo);
878 INP_WLOCK(inp);
879 rip_delhash(inp);
880 inp->inp_laddr = addr->sin_addr;
881 rip_inshash(inp);
882 INP_WUNLOCK(inp);
883 INP_INFO_WUNLOCK(&V_ripcbinfo);
884 return (0);
885}
886
887static int
888rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
889{
890 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
891 struct inpcb *inp;
892
893 if (nam->sa_len != sizeof(*addr))
894 return (EINVAL);
895 if (TAILQ_EMPTY(&V_ifnet))
896 return (EADDRNOTAVAIL);
897 if (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK)
898 return (EAFNOSUPPORT);
899
900 inp = sotoinpcb(so);
901 KASSERT(inp != NULL, ("rip_connect: inp == NULL"));
902
903 INP_INFO_WLOCK(&V_ripcbinfo);
904 INP_WLOCK(inp);
905 rip_delhash(inp);
906 inp->inp_faddr = addr->sin_addr;
907 rip_inshash(inp);
908 soisconnected(so);
909 INP_WUNLOCK(inp);
910 INP_INFO_WUNLOCK(&V_ripcbinfo);
911 return (0);
912}
913
914static int
915rip_shutdown(struct socket *so)
916{
917 struct inpcb *inp;
918
919 inp = sotoinpcb(so);
920 KASSERT(inp != NULL, ("rip_shutdown: inp == NULL"));
921
922 INP_WLOCK(inp);
923 socantsendmore(so);
924 INP_WUNLOCK(inp);
925 return (0);
926}
927
928static int
929rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
930 struct mbuf *control, struct thread *td)
931{
932 struct inpcb *inp;
933 u_long dst;
934
935 inp = sotoinpcb(so);
936 KASSERT(inp != NULL, ("rip_send: inp == NULL"));
937
938 /*
939 * Note: 'dst' reads below are unlocked.
940 */
941 if (so->so_state & SS_ISCONNECTED) {
942 if (nam) {
943 m_freem(m);
944 return (EISCONN);
945 }
946 dst = inp->inp_faddr.s_addr; /* Unlocked read. */
947 } else {
948 if (nam == NULL) {
949 m_freem(m);
950 return (ENOTCONN);
951 }
952 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
953 }
954 return (rip_output(m, so, dst));
955}
956
957static int
958rip_pcblist(SYSCTL_HANDLER_ARGS)
959{
960 int error, i, n;
961 struct inpcb *inp, **inp_list;
962 inp_gen_t gencnt;
963 struct xinpgen xig;
964
965 /*
966 * The process of preparing the TCB list is too time-consuming and
967 * resource-intensive to repeat twice on every request.
968 */
969 if (req->oldptr == 0) {
970 n = V_ripcbinfo.ipi_count;
971 req->oldidx = 2 * (sizeof xig)
972 + (n + n/8) * sizeof(struct xinpcb);
973 return (0);
974 }
975
976 if (req->newptr != 0)
977 return (EPERM);
978
979 /*
980 * OK, now we're committed to doing something.
981 */
982 INP_INFO_RLOCK(&V_ripcbinfo);
983 gencnt = V_ripcbinfo.ipi_gencnt;
984 n = V_ripcbinfo.ipi_count;
985 INP_INFO_RUNLOCK(&V_ripcbinfo);
986
987 xig.xig_len = sizeof xig;
988 xig.xig_count = n;
989 xig.xig_gen = gencnt;
990 xig.xig_sogen = so_gencnt;
991 error = SYSCTL_OUT(req, &xig, sizeof xig);
992 if (error)
993 return (error);
994
995 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
996 if (inp_list == 0)
997 return (ENOMEM);
998
999 INP_INFO_RLOCK(&V_ripcbinfo);
1000 for (inp = LIST_FIRST(V_ripcbinfo.ipi_listhead), i = 0; inp && i < n;
1001 inp = LIST_NEXT(inp, inp_list)) {
1002 INP_RLOCK(inp);
1003 if (inp->inp_gencnt <= gencnt &&
1004 cr_canseeinpcb(req->td->td_ucred, inp) == 0) {
1005 /* XXX held references? */
1006 inp_list[i++] = inp;
1007 }
1008 INP_RUNLOCK(inp);
1009 }
1010 INP_INFO_RUNLOCK(&V_ripcbinfo);
1011 n = i;
1012
1013 error = 0;
1014 for (i = 0; i < n; i++) {
1015 inp = inp_list[i];
1016 INP_RLOCK(inp);
1017 if (inp->inp_gencnt <= gencnt) {
1018 struct xinpcb xi;
1019
1020 bzero(&xi, sizeof(xi));
1021 xi.xi_len = sizeof xi;
1022 /* XXX should avoid extra copy */
1023 bcopy(inp, &xi.xi_inp, sizeof *inp);
1024 if (inp->inp_socket)
1025 sotoxsocket(inp->inp_socket, &xi.xi_socket);
1026 INP_RUNLOCK(inp);
1027 error = SYSCTL_OUT(req, &xi, sizeof xi);
1028 } else
1029 INP_RUNLOCK(inp);
1030 }
1031 if (!error) {
1032 /*
1033 * Give the user an updated idea of our state. If the
1034 * generation differs from what we told her before, she knows
1035 * that something happened while we were processing this
1036 * request, and it might be necessary to retry.
1037 */
1038 INP_INFO_RLOCK(&V_ripcbinfo);
1039 xig.xig_gen = V_ripcbinfo.ipi_gencnt;
1040 xig.xig_sogen = so_gencnt;
1041 xig.xig_count = V_ripcbinfo.ipi_count;
1042 INP_INFO_RUNLOCK(&V_ripcbinfo);
1043 error = SYSCTL_OUT(req, &xig, sizeof xig);
1044 }
1045 free(inp_list, M_TEMP);
1046 return (error);
1047}
1048
1049SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, 0, 0,
1050 rip_pcblist, "S,xinpcb", "List of active raw IP sockets");
1051
1052struct pr_usrreqs rip_usrreqs = {
1053 .pru_abort = rip_abort,
1054 .pru_attach = rip_attach,
1055 .pru_bind = rip_bind,
1056 .pru_connect = rip_connect,
1057 .pru_control = in_control,
1058 .pru_detach = rip_detach,
1059 .pru_disconnect = rip_disconnect,
1060 .pru_peeraddr = in_getpeeraddr,
1061 .pru_send = rip_send,
1062 .pru_shutdown = rip_shutdown,
1063 .pru_sockaddr = in_getsockaddr,
1064 .pru_sosetlabel = in_pcbsosetlabel,
1065 .pru_close = rip_close,
1066};
| 589 else
590 error = ENOPROTOOPT;
591 break;
592
593 case IP_DUMMYNET_CONFIGURE:
594 case IP_DUMMYNET_DEL:
595 case IP_DUMMYNET_FLUSH:
596 if (ip_dn_ctl_ptr != NULL)
597 error = ip_dn_ctl_ptr(sopt);
598 else
599 error = ENOPROTOOPT ;
600 break ;
601
602 case IP_RSVP_ON:
603 error = priv_check(curthread, PRIV_NETINET_MROUTE);
604 if (error != 0)
605 return (error);
606 error = ip_rsvp_init(so);
607 break;
608
609 case IP_RSVP_OFF:
610 error = priv_check(curthread, PRIV_NETINET_MROUTE);
611 if (error != 0)
612 return (error);
613 error = ip_rsvp_done();
614 break;
615
616 case IP_RSVP_VIF_ON:
617 case IP_RSVP_VIF_OFF:
618 error = priv_check(curthread, PRIV_NETINET_MROUTE);
619 if (error != 0)
620 return (error);
621 error = ip_rsvp_vif ?
622 ip_rsvp_vif(so, sopt) : EINVAL;
623 break;
624
625 case MRT_INIT:
626 case MRT_DONE:
627 case MRT_ADD_VIF:
628 case MRT_DEL_VIF:
629 case MRT_ADD_MFC:
630 case MRT_DEL_MFC:
631 case MRT_VERSION:
632 case MRT_ASSERT:
633 case MRT_API_SUPPORT:
634 case MRT_API_CONFIG:
635 case MRT_ADD_BW_UPCALL:
636 case MRT_DEL_BW_UPCALL:
637 error = priv_check(curthread, PRIV_NETINET_MROUTE);
638 if (error != 0)
639 return (error);
640 error = ip_mrouter_set ? ip_mrouter_set(so, sopt) :
641 EOPNOTSUPP;
642 break;
643
644 default:
645 error = ip_ctloutput(so, sopt);
646 break;
647 }
648 break;
649 }
650
651 return (error);
652}
653
654/*
655 * This function exists solely to receive the PRC_IFDOWN messages which are
656 * sent by if_down(). It looks for an ifaddr whose ifa_addr is sa, and calls
657 * in_ifadown() to remove all routes corresponding to that address. It also
658 * receives the PRC_IFUP messages from if_up() and reinstalls the interface
659 * routes.
660 */
661void
662rip_ctlinput(int cmd, struct sockaddr *sa, void *vip)
663{
664 struct in_ifaddr *ia;
665 struct ifnet *ifp;
666 int err;
667 int flags;
668
669 switch (cmd) {
670 case PRC_IFDOWN:
671 IN_IFADDR_RLOCK();
672 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
673 if (ia->ia_ifa.ifa_addr == sa
674 && (ia->ia_flags & IFA_ROUTE)) {
675 ifa_ref(&ia->ia_ifa);
676 IN_IFADDR_RUNLOCK();
677 /*
678 * in_ifscrub kills the interface route.
679 */
680 in_ifscrub(ia->ia_ifp, ia);
681 /*
682 * in_ifadown gets rid of all the rest of the
683 * routes. This is not quite the right thing
684 * to do, but at least if we are running a
685 * routing process they will come back.
686 */
687 in_ifadown(&ia->ia_ifa, 0);
688 ifa_free(&ia->ia_ifa);
689 break;
690 }
691 }
692 if (ia == NULL) /* If ia matched, already unlocked. */
693 IN_IFADDR_RUNLOCK();
694 break;
695
696 case PRC_IFUP:
697 IN_IFADDR_RLOCK();
698 TAILQ_FOREACH(ia, &V_in_ifaddrhead, ia_link) {
699 if (ia->ia_ifa.ifa_addr == sa)
700 break;
701 }
702 if (ia == NULL || (ia->ia_flags & IFA_ROUTE)) {
703 IN_IFADDR_RUNLOCK();
704 return;
705 }
706 ifa_ref(&ia->ia_ifa);
707 IN_IFADDR_RUNLOCK();
708 flags = RTF_UP;
709 ifp = ia->ia_ifa.ifa_ifp;
710
711 if ((ifp->if_flags & IFF_LOOPBACK)
712 || (ifp->if_flags & IFF_POINTOPOINT))
713 flags |= RTF_HOST;
714
715 err = rtinit(&ia->ia_ifa, RTM_ADD, flags);
716 if (err == 0)
717 ia->ia_flags |= IFA_ROUTE;
718 err = ifa_add_loopback_route((struct ifaddr *)ia, sa);
719 ifa_free(&ia->ia_ifa);
720 break;
721 }
722}
723
724u_long rip_sendspace = 9216;
725u_long rip_recvspace = 9216;
726
727SYSCTL_ULONG(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW,
728 &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
729SYSCTL_ULONG(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW,
730 &rip_recvspace, 0, "Maximum space for incoming raw IP datagrams");
731
732static int
733rip_attach(struct socket *so, int proto, struct thread *td)
734{
735 struct inpcb *inp;
736 int error;
737
738 inp = sotoinpcb(so);
739 KASSERT(inp == NULL, ("rip_attach: inp != NULL"));
740
741 error = priv_check(td, PRIV_NETINET_RAW);
742 if (error)
743 return (error);
744 if (proto >= IPPROTO_MAX || proto < 0)
745 return EPROTONOSUPPORT;
746 error = soreserve(so, rip_sendspace, rip_recvspace);
747 if (error)
748 return (error);
749 INP_INFO_WLOCK(&V_ripcbinfo);
750 error = in_pcballoc(so, &V_ripcbinfo);
751 if (error) {
752 INP_INFO_WUNLOCK(&V_ripcbinfo);
753 return (error);
754 }
755 inp = (struct inpcb *)so->so_pcb;
756 inp->inp_vflag |= INP_IPV4;
757 inp->inp_ip_p = proto;
758 inp->inp_ip_ttl = V_ip_defttl;
759 rip_inshash(inp);
760 INP_INFO_WUNLOCK(&V_ripcbinfo);
761 INP_WUNLOCK(inp);
762 return (0);
763}
764
765static void
766rip_detach(struct socket *so)
767{
768 struct inpcb *inp;
769
770 inp = sotoinpcb(so);
771 KASSERT(inp != NULL, ("rip_detach: inp == NULL"));
772 KASSERT(inp->inp_faddr.s_addr == INADDR_ANY,
773 ("rip_detach: not closed"));
774
775 INP_INFO_WLOCK(&V_ripcbinfo);
776 INP_WLOCK(inp);
777 rip_delhash(inp);
778 if (so == V_ip_mrouter && ip_mrouter_done)
779 ip_mrouter_done();
780 if (ip_rsvp_force_done)
781 ip_rsvp_force_done(so);
782 if (so == V_ip_rsvpd)
783 ip_rsvp_done();
784 in_pcbdetach(inp);
785 in_pcbfree(inp);
786 INP_INFO_WUNLOCK(&V_ripcbinfo);
787}
788
789static void
790rip_dodisconnect(struct socket *so, struct inpcb *inp)
791{
792
793 INP_INFO_WLOCK_ASSERT(inp->inp_pcbinfo);
794 INP_WLOCK_ASSERT(inp);
795
796 rip_delhash(inp);
797 inp->inp_faddr.s_addr = INADDR_ANY;
798 rip_inshash(inp);
799 SOCK_LOCK(so);
800 so->so_state &= ~SS_ISCONNECTED;
801 SOCK_UNLOCK(so);
802}
803
804static void
805rip_abort(struct socket *so)
806{
807 struct inpcb *inp;
808
809 inp = sotoinpcb(so);
810 KASSERT(inp != NULL, ("rip_abort: inp == NULL"));
811
812 INP_INFO_WLOCK(&V_ripcbinfo);
813 INP_WLOCK(inp);
814 rip_dodisconnect(so, inp);
815 INP_WUNLOCK(inp);
816 INP_INFO_WUNLOCK(&V_ripcbinfo);
817}
818
819static void
820rip_close(struct socket *so)
821{
822 struct inpcb *inp;
823
824 inp = sotoinpcb(so);
825 KASSERT(inp != NULL, ("rip_close: inp == NULL"));
826
827 INP_INFO_WLOCK(&V_ripcbinfo);
828 INP_WLOCK(inp);
829 rip_dodisconnect(so, inp);
830 INP_WUNLOCK(inp);
831 INP_INFO_WUNLOCK(&V_ripcbinfo);
832}
833
834static int
835rip_disconnect(struct socket *so)
836{
837 struct inpcb *inp;
838
839 if ((so->so_state & SS_ISCONNECTED) == 0)
840 return (ENOTCONN);
841
842 inp = sotoinpcb(so);
843 KASSERT(inp != NULL, ("rip_disconnect: inp == NULL"));
844
845 INP_INFO_WLOCK(&V_ripcbinfo);
846 INP_WLOCK(inp);
847 rip_dodisconnect(so, inp);
848 INP_WUNLOCK(inp);
849 INP_INFO_WUNLOCK(&V_ripcbinfo);
850 return (0);
851}
852
853static int
854rip_bind(struct socket *so, struct sockaddr *nam, struct thread *td)
855{
856 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
857 struct inpcb *inp;
858 int error;
859
860 if (nam->sa_len != sizeof(*addr))
861 return (EINVAL);
862
863 error = prison_check_ip4(td->td_ucred, &addr->sin_addr);
864 if (error != 0)
865 return (error);
866
867 inp = sotoinpcb(so);
868 KASSERT(inp != NULL, ("rip_bind: inp == NULL"));
869
870 if (TAILQ_EMPTY(&V_ifnet) ||
871 (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK) ||
872 (addr->sin_addr.s_addr &&
873 (inp->inp_flags & INP_BINDANY) == 0 &&
874 ifa_ifwithaddr_check((struct sockaddr *)addr) == 0))
875 return (EADDRNOTAVAIL);
876
877 INP_INFO_WLOCK(&V_ripcbinfo);
878 INP_WLOCK(inp);
879 rip_delhash(inp);
880 inp->inp_laddr = addr->sin_addr;
881 rip_inshash(inp);
882 INP_WUNLOCK(inp);
883 INP_INFO_WUNLOCK(&V_ripcbinfo);
884 return (0);
885}
886
887static int
888rip_connect(struct socket *so, struct sockaddr *nam, struct thread *td)
889{
890 struct sockaddr_in *addr = (struct sockaddr_in *)nam;
891 struct inpcb *inp;
892
893 if (nam->sa_len != sizeof(*addr))
894 return (EINVAL);
895 if (TAILQ_EMPTY(&V_ifnet))
896 return (EADDRNOTAVAIL);
897 if (addr->sin_family != AF_INET && addr->sin_family != AF_IMPLINK)
898 return (EAFNOSUPPORT);
899
900 inp = sotoinpcb(so);
901 KASSERT(inp != NULL, ("rip_connect: inp == NULL"));
902
903 INP_INFO_WLOCK(&V_ripcbinfo);
904 INP_WLOCK(inp);
905 rip_delhash(inp);
906 inp->inp_faddr = addr->sin_addr;
907 rip_inshash(inp);
908 soisconnected(so);
909 INP_WUNLOCK(inp);
910 INP_INFO_WUNLOCK(&V_ripcbinfo);
911 return (0);
912}
913
914static int
915rip_shutdown(struct socket *so)
916{
917 struct inpcb *inp;
918
919 inp = sotoinpcb(so);
920 KASSERT(inp != NULL, ("rip_shutdown: inp == NULL"));
921
922 INP_WLOCK(inp);
923 socantsendmore(so);
924 INP_WUNLOCK(inp);
925 return (0);
926}
927
928static int
929rip_send(struct socket *so, int flags, struct mbuf *m, struct sockaddr *nam,
930 struct mbuf *control, struct thread *td)
931{
932 struct inpcb *inp;
933 u_long dst;
934
935 inp = sotoinpcb(so);
936 KASSERT(inp != NULL, ("rip_send: inp == NULL"));
937
938 /*
939 * Note: 'dst' reads below are unlocked.
940 */
941 if (so->so_state & SS_ISCONNECTED) {
942 if (nam) {
943 m_freem(m);
944 return (EISCONN);
945 }
946 dst = inp->inp_faddr.s_addr; /* Unlocked read. */
947 } else {
948 if (nam == NULL) {
949 m_freem(m);
950 return (ENOTCONN);
951 }
952 dst = ((struct sockaddr_in *)nam)->sin_addr.s_addr;
953 }
954 return (rip_output(m, so, dst));
955}
956
957static int
958rip_pcblist(SYSCTL_HANDLER_ARGS)
959{
960 int error, i, n;
961 struct inpcb *inp, **inp_list;
962 inp_gen_t gencnt;
963 struct xinpgen xig;
964
965 /*
966 * The process of preparing the TCB list is too time-consuming and
967 * resource-intensive to repeat twice on every request.
968 */
969 if (req->oldptr == 0) {
970 n = V_ripcbinfo.ipi_count;
971 req->oldidx = 2 * (sizeof xig)
972 + (n + n/8) * sizeof(struct xinpcb);
973 return (0);
974 }
975
976 if (req->newptr != 0)
977 return (EPERM);
978
979 /*
980 * OK, now we're committed to doing something.
981 */
982 INP_INFO_RLOCK(&V_ripcbinfo);
983 gencnt = V_ripcbinfo.ipi_gencnt;
984 n = V_ripcbinfo.ipi_count;
985 INP_INFO_RUNLOCK(&V_ripcbinfo);
986
987 xig.xig_len = sizeof xig;
988 xig.xig_count = n;
989 xig.xig_gen = gencnt;
990 xig.xig_sogen = so_gencnt;
991 error = SYSCTL_OUT(req, &xig, sizeof xig);
992 if (error)
993 return (error);
994
995 inp_list = malloc(n * sizeof *inp_list, M_TEMP, M_WAITOK);
996 if (inp_list == 0)
997 return (ENOMEM);
998
999 INP_INFO_RLOCK(&V_ripcbinfo);
1000 for (inp = LIST_FIRST(V_ripcbinfo.ipi_listhead), i = 0; inp && i < n;
1001 inp = LIST_NEXT(inp, inp_list)) {
1002 INP_RLOCK(inp);
1003 if (inp->inp_gencnt <= gencnt &&
1004 cr_canseeinpcb(req->td->td_ucred, inp) == 0) {
1005 /* XXX held references? */
1006 inp_list[i++] = inp;
1007 }
1008 INP_RUNLOCK(inp);
1009 }
1010 INP_INFO_RUNLOCK(&V_ripcbinfo);
1011 n = i;
1012
1013 error = 0;
1014 for (i = 0; i < n; i++) {
1015 inp = inp_list[i];
1016 INP_RLOCK(inp);
1017 if (inp->inp_gencnt <= gencnt) {
1018 struct xinpcb xi;
1019
1020 bzero(&xi, sizeof(xi));
1021 xi.xi_len = sizeof xi;
1022 /* XXX should avoid extra copy */
1023 bcopy(inp, &xi.xi_inp, sizeof *inp);
1024 if (inp->inp_socket)
1025 sotoxsocket(inp->inp_socket, &xi.xi_socket);
1026 INP_RUNLOCK(inp);
1027 error = SYSCTL_OUT(req, &xi, sizeof xi);
1028 } else
1029 INP_RUNLOCK(inp);
1030 }
1031 if (!error) {
1032 /*
1033 * Give the user an updated idea of our state. If the
1034 * generation differs from what we told her before, she knows
1035 * that something happened while we were processing this
1036 * request, and it might be necessary to retry.
1037 */
1038 INP_INFO_RLOCK(&V_ripcbinfo);
1039 xig.xig_gen = V_ripcbinfo.ipi_gencnt;
1040 xig.xig_sogen = so_gencnt;
1041 xig.xig_count = V_ripcbinfo.ipi_count;
1042 INP_INFO_RUNLOCK(&V_ripcbinfo);
1043 error = SYSCTL_OUT(req, &xig, sizeof xig);
1044 }
1045 free(inp_list, M_TEMP);
1046 return (error);
1047}
1048
1049SYSCTL_PROC(_net_inet_raw, OID_AUTO/*XXX*/, pcblist, CTLFLAG_RD, 0, 0,
1050 rip_pcblist, "S,xinpcb", "List of active raw IP sockets");
1051
1052struct pr_usrreqs rip_usrreqs = {
1053 .pru_abort = rip_abort,
1054 .pru_attach = rip_attach,
1055 .pru_bind = rip_bind,
1056 .pru_connect = rip_connect,
1057 .pru_control = in_control,
1058 .pru_detach = rip_detach,
1059 .pru_disconnect = rip_disconnect,
1060 .pru_peeraddr = in_getpeeraddr,
1061 .pru_send = rip_send,
1062 .pru_shutdown = rip_shutdown,
1063 .pru_sockaddr = in_getsockaddr,
1064 .pru_sosetlabel = in_pcbsosetlabel,
1065 .pru_close = rip_close,
1066};
|