if_spppsubr.c revision 88577
14910Swollman/* 24910Swollman * Synchronous PPP/Cisco link level subroutines. 34910Swollman * Keepalive protocol implemented in both Cisco and PPP modes. 44910Swollman * 530300Sjoerg * Copyright (C) 1994-1996 Cronyx Engineering Ltd. 625944Sjoerg * Author: Serge Vakulenko, <vak@cronyx.ru> 74910Swollman * 825944Sjoerg * Heavily revamped to conform to RFC 1661. 988534Sjoerg * Copyright (C) 1997, 2001 Joerg Wunsch. 1025944Sjoerg * 114910Swollman * This software is distributed with NO WARRANTIES, not even the implied 124910Swollman * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 134910Swollman * 144910Swollman * Authors grant any other persons or organisations permission to use 154910Swollman * or modify this software as long as this message is kept with the software, 164910Swollman * all derivative works or modified versions. 174910Swollman * 1830300Sjoerg * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997 1916288Sgpalmer * 2050477Speter * $FreeBSD: head/sys/net/if_spppsubr.c 88577 2001-12-28 15:59:54Z joerg $ 214910Swollman */ 224910Swollman 2340008Sjoerg#include <sys/param.h> 2440008Sjoerg 2542065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 2632350Seivind#include "opt_inet.h" 2754263Sshin#include "opt_inet6.h" 2831742Seivind#include "opt_ipx.h" 2940008Sjoerg#endif 3031742Seivind 3140008Sjoerg#ifdef NetBSD1_3 3240008Sjoerg# if NetBSD1_3 > 6 3340008Sjoerg# include "opt_inet.h" 3454263Sshin# include "opt_inet6.h" 3540008Sjoerg# include "opt_iso.h" 3640008Sjoerg# endif 3740008Sjoerg#endif 3840008Sjoerg 394952Sbde#include <sys/systm.h> 404952Sbde#include <sys/kernel.h> 4170199Sjhay#include <sys/module.h> 4224204Sbde#include <sys/sockio.h> 434910Swollman#include <sys/socket.h> 4425706Sjoerg#include <sys/syslog.h> 4542104Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 4659604Sobrien#include <sys/random.h> 4742104Sphk#endif 4829024Sbde#include <sys/malloc.h> 494910Swollman#include <sys/mbuf.h> 5040008Sjoerg 5140008Sjoerg#if defined (__OpenBSD__) 5240008Sjoerg#include <sys/md5k.h> 5340008Sjoerg#else 5430300Sjoerg#include <sys/md5.h> 5540008Sjoerg#endif 564910Swollman 574910Swollman#include <net/if.h> 584910Swollman#include <net/netisr.h> 594910Swollman#include <net/if_types.h> 6042104Sphk#include <net/route.h> 6188534Sjoerg#include <netinet/in.h> 6288534Sjoerg#include <netinet/in_systm.h> 6388534Sjoerg#include <netinet/ip.h> 6488534Sjoerg#include <net/slcompress.h> 654910Swollman 6640008Sjoerg#if defined (__NetBSD__) || defined (__OpenBSD__) 6740008Sjoerg#include <machine/cpu.h> /* XXX for softnet */ 6840008Sjoerg#endif 6942104Sphk 7030300Sjoerg#include <machine/stdarg.h> 7130300Sjoerg 724910Swollman#ifdef INET 734910Swollman#include <netinet/in.h> 744910Swollman#include <netinet/in_systm.h> 754910Swollman#include <netinet/in_var.h> 764910Swollman#include <netinet/ip.h> 774910Swollman#include <netinet/tcp.h> 7840008Sjoerg# if defined (__FreeBSD__) || defined (__OpenBSD__) 7940008Sjoerg# include <netinet/if_ether.h> 8040008Sjoerg# else 8140008Sjoerg# include <net/ethertypes.h> 8240008Sjoerg# endif 8332350Seivind#else 8440008Sjoerg# error Huh? sppp without INET? 854910Swollman#endif 864910Swollman 8711819Sjulian#ifdef IPX 8811819Sjulian#include <netipx/ipx.h> 8911819Sjulian#include <netipx/ipx_if.h> 9011819Sjulian#endif 9111819Sjulian 924910Swollman#ifdef NS 934910Swollman#include <netns/ns.h> 944910Swollman#include <netns/ns_if.h> 954910Swollman#endif 964910Swollman 974910Swollman#include <net/if_sppp.h> 984910Swollman 9942065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 10042064Sphk# define UNTIMEOUT(fun, arg, handle) untimeout(fun, arg, handle) 10142064Sphk# define TIMEOUT(fun, arg1, arg2, handle) handle = timeout(fun, arg1, arg2) 10242104Sphk# define IOCTL_CMD_T u_long 10340008Sjoerg#else 10442064Sphk# define UNTIMEOUT(fun, arg, handle) untimeout(fun, arg) 10542064Sphk# define TIMEOUT(fun, arg1, arg2, handle) timeout(fun, arg1, arg2) 10642104Sphk# define IOCTL_CMD_T int 10740008Sjoerg#endif 10842104Sphk 1094910Swollman#define MAXALIVECNT 3 /* max. alive packets */ 1104910Swollman 11125944Sjoerg/* 11225944Sjoerg * Interface flags that can be set in an ifconfig command. 11325944Sjoerg * 11425955Sjoerg * Setting link0 will make the link passive, i.e. it will be marked 11525944Sjoerg * as being administrative openable, but won't be opened to begin 11625944Sjoerg * with. Incoming calls will be answered, or subsequent calls with 11725944Sjoerg * -link1 will cause the administrative open of the LCP layer. 11825955Sjoerg * 11925955Sjoerg * Setting link1 will cause the link to auto-dial only as packets 12025955Sjoerg * arrive to be sent. 12130300Sjoerg * 12230300Sjoerg * Setting IFF_DEBUG will syslog the option negotiation and state 12330300Sjoerg * transitions at level kern.debug. Note: all logs consistently look 12430300Sjoerg * like 12530300Sjoerg * 12630300Sjoerg * <if-name><unit>: <proto-name> <additional info...> 12730300Sjoerg * 12830300Sjoerg * with <if-name><unit> being something like "bppp0", and <proto-name> 12930300Sjoerg * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc. 13025944Sjoerg */ 13125944Sjoerg 13225955Sjoerg#define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */ 13325955Sjoerg#define IFF_AUTO IFF_LINK1 /* auto-dial on output */ 13445152Sphk#define IFF_CISCO IFF_LINK2 /* auto-dial on output */ 13525944Sjoerg 13630300Sjoerg#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */ 13730300Sjoerg#define PPP_UI 0x03 /* Unnumbered Information */ 13830300Sjoerg#define PPP_IP 0x0021 /* Internet Protocol */ 13930300Sjoerg#define PPP_ISO 0x0023 /* ISO OSI Protocol */ 14030300Sjoerg#define PPP_XNS 0x0025 /* Xerox NS Protocol */ 14130300Sjoerg#define PPP_IPX 0x002b /* Novell IPX Protocol */ 14288534Sjoerg#define PPP_VJ_COMP 0x002d /* VJ compressed TCP/IP */ 14388534Sjoerg#define PPP_VJ_UCOMP 0x002f /* VJ uncompressed TCP/IP */ 14478064Sume#define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */ 14530300Sjoerg#define PPP_LCP 0xc021 /* Link Control Protocol */ 14630300Sjoerg#define PPP_PAP 0xc023 /* Password Authentication Protocol */ 14730300Sjoerg#define PPP_CHAP 0xc223 /* Challenge-Handshake Auth Protocol */ 14830300Sjoerg#define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */ 14978064Sume#define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */ 1504910Swollman 15125944Sjoerg#define CONF_REQ 1 /* PPP configure request */ 15225944Sjoerg#define CONF_ACK 2 /* PPP configure acknowledge */ 15325944Sjoerg#define CONF_NAK 3 /* PPP configure negative ack */ 15425944Sjoerg#define CONF_REJ 4 /* PPP configure reject */ 15525944Sjoerg#define TERM_REQ 5 /* PPP terminate request */ 15625944Sjoerg#define TERM_ACK 6 /* PPP terminate acknowledge */ 15725944Sjoerg#define CODE_REJ 7 /* PPP code reject */ 15825944Sjoerg#define PROTO_REJ 8 /* PPP protocol reject */ 15925944Sjoerg#define ECHO_REQ 9 /* PPP echo request */ 16025944Sjoerg#define ECHO_REPLY 10 /* PPP echo reply */ 16125944Sjoerg#define DISC_REQ 11 /* PPP discard request */ 1624910Swollman 16330300Sjoerg#define LCP_OPT_MRU 1 /* maximum receive unit */ 16430300Sjoerg#define LCP_OPT_ASYNC_MAP 2 /* async control character map */ 16530300Sjoerg#define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */ 16630300Sjoerg#define LCP_OPT_QUAL_PROTO 4 /* quality protocol */ 16730300Sjoerg#define LCP_OPT_MAGIC 5 /* magic number */ 16830300Sjoerg#define LCP_OPT_RESERVED 6 /* reserved */ 16930300Sjoerg#define LCP_OPT_PROTO_COMP 7 /* protocol field compression */ 17030300Sjoerg#define LCP_OPT_ADDR_COMP 8 /* address/control field compression */ 1714910Swollman 17225944Sjoerg#define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */ 17325944Sjoerg#define IPCP_OPT_COMPRESSION 2 /* IP compression protocol (VJ) */ 17425944Sjoerg#define IPCP_OPT_ADDRESS 3 /* local IP address */ 1754910Swollman 17678064Sume#define IPV6CP_OPT_IFID 1 /* interface identifier */ 17778064Sume#define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */ 17878064Sume 17988534Sjoerg#define IPCP_COMP_VJ 0x2d /* Code for VJ compression */ 18088534Sjoerg 18130300Sjoerg#define PAP_REQ 1 /* PAP name/password request */ 18230300Sjoerg#define PAP_ACK 2 /* PAP acknowledge */ 18330300Sjoerg#define PAP_NAK 3 /* PAP fail */ 1844910Swollman 18530300Sjoerg#define CHAP_CHALLENGE 1 /* CHAP challenge request */ 18630300Sjoerg#define CHAP_RESPONSE 2 /* CHAP challenge response */ 18730300Sjoerg#define CHAP_SUCCESS 3 /* CHAP response ok */ 18830300Sjoerg#define CHAP_FAILURE 4 /* CHAP response failed */ 18930300Sjoerg 19030300Sjoerg#define CHAP_MD5 5 /* hash algorithm - MD5 */ 19130300Sjoerg 19230300Sjoerg#define CISCO_MULTICAST 0x8f /* Cisco multicast address */ 19330300Sjoerg#define CISCO_UNICAST 0x0f /* Cisco unicast address */ 19430300Sjoerg#define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */ 19530300Sjoerg#define CISCO_ADDR_REQ 0 /* Cisco address request */ 19630300Sjoerg#define CISCO_ADDR_REPLY 1 /* Cisco address reply */ 19730300Sjoerg#define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */ 19830300Sjoerg 19925944Sjoerg/* states are named and numbered according to RFC 1661 */ 20025944Sjoerg#define STATE_INITIAL 0 20125944Sjoerg#define STATE_STARTING 1 20225944Sjoerg#define STATE_CLOSED 2 20325944Sjoerg#define STATE_STOPPED 3 20425944Sjoerg#define STATE_CLOSING 4 20525944Sjoerg#define STATE_STOPPING 5 20625944Sjoerg#define STATE_REQ_SENT 6 20725944Sjoerg#define STATE_ACK_RCVD 7 20825944Sjoerg#define STATE_ACK_SENT 8 20925944Sjoerg#define STATE_OPENED 9 21025944Sjoerg 2114910Swollmanstruct ppp_header { 21211189Sjkh u_char address; 21311189Sjkh u_char control; 21411189Sjkh u_short protocol; 2154910Swollman}; 2164910Swollman#define PPP_HEADER_LEN sizeof (struct ppp_header) 2174910Swollman 2184910Swollmanstruct lcp_header { 21911189Sjkh u_char type; 22011189Sjkh u_char ident; 22111189Sjkh u_short len; 2224910Swollman}; 2234910Swollman#define LCP_HEADER_LEN sizeof (struct lcp_header) 2244910Swollman 2254910Swollmanstruct cisco_packet { 22611189Sjkh u_long type; 22711189Sjkh u_long par1; 22811189Sjkh u_long par2; 22911189Sjkh u_short rel; 23011189Sjkh u_short time0; 23111189Sjkh u_short time1; 2324910Swollman}; 2334910Swollman#define CISCO_PACKET_LEN 18 2344910Swollman 23525944Sjoerg/* 23625944Sjoerg * We follow the spelling and capitalization of RFC 1661 here, to make 23725944Sjoerg * it easier comparing with the standard. Please refer to this RFC in 23825944Sjoerg * case you can't make sense out of these abbreviation; it will also 23925944Sjoerg * explain the semantics related to the various events and actions. 24025944Sjoerg */ 24125944Sjoergstruct cp { 24225944Sjoerg u_short proto; /* PPP control protocol number */ 24325944Sjoerg u_char protoidx; /* index into state table in struct sppp */ 24425944Sjoerg u_char flags; 24525944Sjoerg#define CP_LCP 0x01 /* this is the LCP */ 24625944Sjoerg#define CP_AUTH 0x02 /* this is an authentication protocol */ 24725944Sjoerg#define CP_NCP 0x04 /* this is a NCP */ 24825944Sjoerg#define CP_QUAL 0x08 /* this is a quality reporting protocol */ 24925944Sjoerg const char *name; /* name of this control protocol */ 25025944Sjoerg /* event handlers */ 25125944Sjoerg void (*Up)(struct sppp *sp); 25225944Sjoerg void (*Down)(struct sppp *sp); 25325944Sjoerg void (*Open)(struct sppp *sp); 25425944Sjoerg void (*Close)(struct sppp *sp); 25525944Sjoerg void (*TO)(void *sp); 25625944Sjoerg int (*RCR)(struct sppp *sp, struct lcp_header *h, int len); 25725944Sjoerg void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len); 25825944Sjoerg void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len); 25925944Sjoerg /* actions */ 26025944Sjoerg void (*tlu)(struct sppp *sp); 26125944Sjoerg void (*tld)(struct sppp *sp); 26225944Sjoerg void (*tls)(struct sppp *sp); 26325944Sjoerg void (*tlf)(struct sppp *sp); 26425944Sjoerg void (*scr)(struct sppp *sp); 26525944Sjoerg}; 26625944Sjoerg 26712820Sphkstatic struct sppp *spppq; 26842065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 26930300Sjoergstatic struct callout_handle keepalive_ch; 27040008Sjoerg#endif 2714910Swollman 27242065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 27340008Sjoerg#define SPP_FMT "%s%d: " 27440008Sjoerg#define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit 27540008Sjoerg#else 27640008Sjoerg#define SPP_FMT "%s: " 27740008Sjoerg#define SPP_ARGS(ifp) (ifp)->if_xname 27840008Sjoerg#endif 27940008Sjoerg 2804910Swollman/* 2814910Swollman * The following disgusting hack gets around the problem that IP TOS 2824910Swollman * can't be set yet. We want to put "interactive" traffic on a high 2834910Swollman * priority queue. To decide if traffic is interactive, we check that 2844910Swollman * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control. 28530300Sjoerg * 28630300Sjoerg * XXX is this really still necessary? - joerg - 2874910Swollman */ 28811189Sjkhstatic u_short interactive_ports[8] = { 2894910Swollman 0, 513, 0, 0, 2904910Swollman 0, 21, 0, 23, 2914910Swollman}; 2924910Swollman#define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p)) 2934910Swollman 29425944Sjoerg/* almost every function needs these */ 29525944Sjoerg#define STDDCL \ 29625944Sjoerg struct ifnet *ifp = &sp->pp_if; \ 29725944Sjoerg int debug = ifp->if_flags & IFF_DEBUG 29811189Sjkh 29930300Sjoergstatic int sppp_output(struct ifnet *ifp, struct mbuf *m, 30025944Sjoerg struct sockaddr *dst, struct rtentry *rt); 3014910Swollman 30225944Sjoergstatic void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2); 30325944Sjoergstatic void sppp_cisco_input(struct sppp *sp, struct mbuf *m); 30425944Sjoerg 30525944Sjoergstatic void sppp_cp_input(const struct cp *cp, struct sppp *sp, 30625944Sjoerg struct mbuf *m); 30725944Sjoergstatic void sppp_cp_send(struct sppp *sp, u_short proto, u_char type, 30825944Sjoerg u_char ident, u_short len, void *data); 30942104Sphk/* static void sppp_cp_timeout(void *arg); */ 31025944Sjoergstatic void sppp_cp_change_state(const struct cp *cp, struct sppp *sp, 31125944Sjoerg int newstate); 31230300Sjoergstatic void sppp_auth_send(const struct cp *cp, 31342104Sphk struct sppp *sp, unsigned int type, unsigned int id, 31430300Sjoerg ...); 31525944Sjoerg 31625944Sjoergstatic void sppp_up_event(const struct cp *cp, struct sppp *sp); 31725944Sjoergstatic void sppp_down_event(const struct cp *cp, struct sppp *sp); 31825944Sjoergstatic void sppp_open_event(const struct cp *cp, struct sppp *sp); 31925944Sjoergstatic void sppp_close_event(const struct cp *cp, struct sppp *sp); 32025944Sjoergstatic void sppp_to_event(const struct cp *cp, struct sppp *sp); 32125944Sjoerg 32230300Sjoergstatic void sppp_null(struct sppp *sp); 32330300Sjoerg 32425944Sjoergstatic void sppp_lcp_init(struct sppp *sp); 32525944Sjoergstatic void sppp_lcp_up(struct sppp *sp); 32625944Sjoergstatic void sppp_lcp_down(struct sppp *sp); 32725944Sjoergstatic void sppp_lcp_open(struct sppp *sp); 32825944Sjoergstatic void sppp_lcp_close(struct sppp *sp); 32925944Sjoergstatic void sppp_lcp_TO(void *sp); 33025944Sjoergstatic int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 33125944Sjoergstatic void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 33225944Sjoergstatic void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 33325944Sjoergstatic void sppp_lcp_tlu(struct sppp *sp); 33425944Sjoergstatic void sppp_lcp_tld(struct sppp *sp); 33525944Sjoergstatic void sppp_lcp_tls(struct sppp *sp); 33625944Sjoergstatic void sppp_lcp_tlf(struct sppp *sp); 33725944Sjoergstatic void sppp_lcp_scr(struct sppp *sp); 33830300Sjoergstatic void sppp_lcp_check_and_close(struct sppp *sp); 33930300Sjoergstatic int sppp_ncp_check(struct sppp *sp); 34025944Sjoerg 34125944Sjoergstatic void sppp_ipcp_init(struct sppp *sp); 34225944Sjoergstatic void sppp_ipcp_up(struct sppp *sp); 34325944Sjoergstatic void sppp_ipcp_down(struct sppp *sp); 34425944Sjoergstatic void sppp_ipcp_open(struct sppp *sp); 34525944Sjoergstatic void sppp_ipcp_close(struct sppp *sp); 34625944Sjoergstatic void sppp_ipcp_TO(void *sp); 34725944Sjoergstatic int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len); 34825944Sjoergstatic void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 34925944Sjoergstatic void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 35025944Sjoergstatic void sppp_ipcp_tlu(struct sppp *sp); 35125944Sjoergstatic void sppp_ipcp_tld(struct sppp *sp); 35225944Sjoergstatic void sppp_ipcp_tls(struct sppp *sp); 35325944Sjoergstatic void sppp_ipcp_tlf(struct sppp *sp); 35425944Sjoergstatic void sppp_ipcp_scr(struct sppp *sp); 35525944Sjoerg 35678064Sumestatic void sppp_ipv6cp_init(struct sppp *sp); 35778064Sumestatic void sppp_ipv6cp_up(struct sppp *sp); 35878064Sumestatic void sppp_ipv6cp_down(struct sppp *sp); 35978064Sumestatic void sppp_ipv6cp_open(struct sppp *sp); 36078064Sumestatic void sppp_ipv6cp_close(struct sppp *sp); 36178064Sumestatic void sppp_ipv6cp_TO(void *sp); 36278064Sumestatic int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len); 36378064Sumestatic void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len); 36478064Sumestatic void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len); 36578064Sumestatic void sppp_ipv6cp_tlu(struct sppp *sp); 36678064Sumestatic void sppp_ipv6cp_tld(struct sppp *sp); 36778064Sumestatic void sppp_ipv6cp_tls(struct sppp *sp); 36878064Sumestatic void sppp_ipv6cp_tlf(struct sppp *sp); 36978064Sumestatic void sppp_ipv6cp_scr(struct sppp *sp); 37078064Sume 37130300Sjoergstatic void sppp_pap_input(struct sppp *sp, struct mbuf *m); 37230300Sjoergstatic void sppp_pap_init(struct sppp *sp); 37330300Sjoergstatic void sppp_pap_open(struct sppp *sp); 37430300Sjoergstatic void sppp_pap_close(struct sppp *sp); 37530300Sjoergstatic void sppp_pap_TO(void *sp); 37630300Sjoergstatic void sppp_pap_my_TO(void *sp); 37730300Sjoergstatic void sppp_pap_tlu(struct sppp *sp); 37830300Sjoergstatic void sppp_pap_tld(struct sppp *sp); 37930300Sjoergstatic void sppp_pap_scr(struct sppp *sp); 38030300Sjoerg 38130300Sjoergstatic void sppp_chap_input(struct sppp *sp, struct mbuf *m); 38230300Sjoergstatic void sppp_chap_init(struct sppp *sp); 38330300Sjoergstatic void sppp_chap_open(struct sppp *sp); 38430300Sjoergstatic void sppp_chap_close(struct sppp *sp); 38530300Sjoergstatic void sppp_chap_TO(void *sp); 38630300Sjoergstatic void sppp_chap_tlu(struct sppp *sp); 38730300Sjoergstatic void sppp_chap_tld(struct sppp *sp); 38830300Sjoergstatic void sppp_chap_scr(struct sppp *sp); 38930300Sjoerg 39030300Sjoergstatic const char *sppp_auth_type_name(u_short proto, u_char type); 39125944Sjoergstatic const char *sppp_cp_type_name(u_char type); 39230300Sjoergstatic const char *sppp_dotted_quad(u_long addr); 39330300Sjoergstatic const char *sppp_ipcp_opt_name(u_char opt); 39478064Sume#ifdef INET6 39578064Sumestatic const char *sppp_ipv6cp_opt_name(u_char opt); 39678064Sume#endif 39725944Sjoergstatic const char *sppp_lcp_opt_name(u_char opt); 39825944Sjoergstatic const char *sppp_phase_name(enum ppp_phase phase); 39925944Sjoergstatic const char *sppp_proto_name(u_short proto); 40030300Sjoergstatic const char *sppp_state_name(int state); 40138343Sbdestatic int sppp_params(struct sppp *sp, u_long cmd, void *data); 40230300Sjoergstatic int sppp_strnlen(u_char *p, int max); 40330300Sjoergstatic void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, 40430300Sjoerg u_long *srcmask); 40525944Sjoergstatic void sppp_keepalive(void *dummy); 40630300Sjoergstatic void sppp_phase_network(struct sppp *sp); 40730300Sjoergstatic void sppp_print_bytes(const u_char *p, u_short len); 40830300Sjoergstatic void sppp_print_string(const char *p, u_short len); 40925944Sjoergstatic void sppp_qflush(struct ifqueue *ifq); 41025944Sjoergstatic void sppp_set_ip_addr(struct sppp *sp, u_long src); 41178064Sume#ifdef INET6 41278064Sumestatic void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, 41378064Sume struct in6_addr *dst, struct in6_addr *srcmask); 41478064Sume#ifdef IPV6CP_MYIFID_DYN 41578064Sumestatic void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src); 41678064Sumestatic void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src); 41778064Sume#endif 41878064Sumestatic void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src); 41978064Sume#endif 42025944Sjoerg 42125944Sjoerg/* our control protocol descriptors */ 42233181Seivindstatic const struct cp lcp = { 42325944Sjoerg PPP_LCP, IDX_LCP, CP_LCP, "lcp", 42425944Sjoerg sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close, 42525944Sjoerg sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak, 42625944Sjoerg sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf, 42725944Sjoerg sppp_lcp_scr 42825944Sjoerg}; 42925944Sjoerg 43033181Seivindstatic const struct cp ipcp = { 43125944Sjoerg PPP_IPCP, IDX_IPCP, CP_NCP, "ipcp", 43225944Sjoerg sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close, 43325944Sjoerg sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak, 43425944Sjoerg sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf, 43525944Sjoerg sppp_ipcp_scr 43625944Sjoerg}; 43725944Sjoerg 43878064Sumestatic const struct cp ipv6cp = { 43978064Sume PPP_IPV6CP, IDX_IPV6CP, 44078064Sume#ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/ 44178064Sume CP_NCP, 44278064Sume#else 44378064Sume 0, 44478064Sume#endif 44578064Sume "ipv6cp", 44678064Sume sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close, 44778064Sume sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak, 44878064Sume sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf, 44978064Sume sppp_ipv6cp_scr 45078064Sume}; 45178064Sume 45233181Seivindstatic const struct cp pap = { 45330300Sjoerg PPP_PAP, IDX_PAP, CP_AUTH, "pap", 45430300Sjoerg sppp_null, sppp_null, sppp_pap_open, sppp_pap_close, 45530300Sjoerg sppp_pap_TO, 0, 0, 0, 45630300Sjoerg sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null, 45730300Sjoerg sppp_pap_scr 45830300Sjoerg}; 45930300Sjoerg 46033181Seivindstatic const struct cp chap = { 46130300Sjoerg PPP_CHAP, IDX_CHAP, CP_AUTH, "chap", 46230300Sjoerg sppp_null, sppp_null, sppp_chap_open, sppp_chap_close, 46330300Sjoerg sppp_chap_TO, 0, 0, 0, 46430300Sjoerg sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null, 46530300Sjoerg sppp_chap_scr 46630300Sjoerg}; 46730300Sjoerg 46833181Seivindstatic const struct cp *cps[IDX_COUNT] = { 46925944Sjoerg &lcp, /* IDX_LCP */ 47025944Sjoerg &ipcp, /* IDX_IPCP */ 47178064Sume &ipv6cp, /* IDX_IPV6CP */ 47230300Sjoerg &pap, /* IDX_PAP */ 47330300Sjoerg &chap, /* IDX_CHAP */ 47425944Sjoerg}; 47525944Sjoerg 47670199Sjhaystatic int 47770199Sjhaysppp_modevent(module_t mod, int type, void *unused) 47870199Sjhay{ 47970199Sjhay switch (type) { 48070199Sjhay case MOD_LOAD: 48170199Sjhay break; 48270199Sjhay case MOD_UNLOAD: 48370199Sjhay return EACCES; 48470199Sjhay break; 48570199Sjhay default: 48670199Sjhay break; 48770199Sjhay } 48870199Sjhay return 0; 48970199Sjhay} 49070199Sjhaystatic moduledata_t spppmod = { 49170199Sjhay "sppp", 49270199Sjhay sppp_modevent, 49370199Sjhay 0 49470199Sjhay}; 49570199SjhayMODULE_VERSION(sppp, 1); 49670199SjhayDECLARE_MODULE(sppp, spppmod, SI_SUB_DRIVERS, SI_ORDER_ANY); 49725944Sjoerg 49870199Sjhay/* 49925944Sjoerg * Exported functions, comprising our interface to the lower layer. 5004910Swollman */ 5014910Swollman 5024910Swollman/* 5034910Swollman * Process the received packet. 5044910Swollman */ 50525706Sjoergvoid 50625706Sjoergsppp_input(struct ifnet *ifp, struct mbuf *m) 5074910Swollman{ 5084910Swollman struct ppp_header *h; 5094910Swollman struct ifqueue *inq = 0; 51025944Sjoerg struct sppp *sp = (struct sppp *)ifp; 51188577Sjoerg int len, do_account = 0; 51225944Sjoerg int debug = ifp->if_flags & IFF_DEBUG; 5134910Swollman 5144910Swollman if (ifp->if_flags & IFF_UP) 5154910Swollman /* Count received bytes, add FCS and one flag */ 5164910Swollman ifp->if_ibytes += m->m_pkthdr.len + 3; 5174910Swollman 5184910Swollman if (m->m_pkthdr.len <= PPP_HEADER_LEN) { 5194910Swollman /* Too small packet, drop it. */ 52025944Sjoerg if (debug) 52125706Sjoerg log(LOG_DEBUG, 52240008Sjoerg SPP_FMT "input packet is too small, %d bytes\n", 52340008Sjoerg SPP_ARGS(ifp), m->m_pkthdr.len); 52425944Sjoerg drop: 52525944Sjoerg ++ifp->if_ierrors; 52625944Sjoerg ++ifp->if_iqdrops; 5274910Swollman m_freem (m); 5284910Swollman return; 5294910Swollman } 5304910Swollman 5314910Swollman /* Get PPP header. */ 5324910Swollman h = mtod (m, struct ppp_header*); 5334910Swollman m_adj (m, PPP_HEADER_LEN); 5344910Swollman 5354910Swollman switch (h->address) { 5364910Swollman case PPP_ALLSTATIONS: 5374910Swollman if (h->control != PPP_UI) 5384910Swollman goto invalid; 53945152Sphk if (sp->pp_mode == IFF_CISCO) { 54025944Sjoerg if (debug) 54125706Sjoerg log(LOG_DEBUG, 54240008Sjoerg SPP_FMT "PPP packet in Cisco mode " 54325706Sjoerg "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 54440008Sjoerg SPP_ARGS(ifp), 54525706Sjoerg h->address, h->control, ntohs(h->protocol)); 54611189Sjkh goto drop; 54711189Sjkh } 5484910Swollman switch (ntohs (h->protocol)) { 5494910Swollman default: 55025944Sjoerg if (debug) 55125706Sjoerg log(LOG_DEBUG, 55244145Sphk SPP_FMT "rejecting protocol " 55325706Sjoerg "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 55440008Sjoerg SPP_ARGS(ifp), 55525706Sjoerg h->address, h->control, ntohs(h->protocol)); 55644145Sphk if (sp->state[IDX_LCP] == STATE_OPENED) 55744145Sphk sppp_cp_send (sp, PPP_LCP, PROTO_REJ, 55878064Sume ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2, 55944145Sphk &h->protocol); 5604910Swollman ++ifp->if_noproto; 5614910Swollman goto drop; 5624910Swollman case PPP_LCP: 56330300Sjoerg sppp_cp_input(&lcp, sp, m); 5644910Swollman m_freem (m); 5654910Swollman return; 56630300Sjoerg case PPP_PAP: 56730300Sjoerg if (sp->pp_phase >= PHASE_AUTHENTICATE) 56830300Sjoerg sppp_pap_input(sp, m); 56930300Sjoerg m_freem (m); 57030300Sjoerg return; 57130300Sjoerg case PPP_CHAP: 57230300Sjoerg if (sp->pp_phase >= PHASE_AUTHENTICATE) 57330300Sjoerg sppp_chap_input(sp, m); 57430300Sjoerg m_freem (m); 57530300Sjoerg return; 5764910Swollman#ifdef INET 5774910Swollman case PPP_IPCP: 57825944Sjoerg if (sp->pp_phase == PHASE_NETWORK) 57930300Sjoerg sppp_cp_input(&ipcp, sp, m); 5804910Swollman m_freem (m); 5814910Swollman return; 5824910Swollman case PPP_IP: 58325944Sjoerg if (sp->state[IDX_IPCP] == STATE_OPENED) { 5844910Swollman schednetisr (NETISR_IP); 5854910Swollman inq = &ipintrq; 5864910Swollman } 58788577Sjoerg do_account++; 5884910Swollman break; 5894910Swollman#endif 59078064Sume#ifdef INET6 59178064Sume case PPP_IPV6CP: 59278064Sume if (sp->pp_phase == PHASE_NETWORK) 59378064Sume sppp_cp_input(&ipv6cp, sp, m); 59478064Sume m_freem (m); 59578064Sume return; 59678064Sume 59778064Sume case PPP_IPV6: 59878064Sume if (sp->state[IDX_IPV6CP] == STATE_OPENED) { 59978064Sume schednetisr (NETISR_IPV6); 60078064Sume inq = &ip6intrq; 60178064Sume } 60288577Sjoerg do_account++; 60378064Sume break; 60488534Sjoerg case PPP_VJ_COMP: 60588534Sjoerg if (sp->state[IDX_IPCP] == STATE_OPENED) { 60688534Sjoerg if ((len = 60788534Sjoerg sl_uncompress_tcp((u_char **)&m->m_data, 60888534Sjoerg m->m_len, 60988534Sjoerg TYPE_COMPRESSED_TCP, 61088534Sjoerg &sp->pp_comp)) <= 0) 61188534Sjoerg goto drop; 61288534Sjoerg m->m_len = m->m_pkthdr.len = len; 61388534Sjoerg schednetisr (NETISR_IP); 61488534Sjoerg inq = &ipintrq; 61588534Sjoerg } 61688534Sjoerg break; 61788534Sjoerg case PPP_VJ_UCOMP: 61888534Sjoerg if (sp->state[IDX_IPCP] == STATE_OPENED) { 61988534Sjoerg if ((len = 62088534Sjoerg sl_uncompress_tcp((u_char **)&m->m_data, 62188534Sjoerg m->m_len, 62288534Sjoerg TYPE_UNCOMPRESSED_TCP, 62388534Sjoerg &sp->pp_comp)) <= 0) 62488534Sjoerg goto drop; 62588534Sjoerg m->m_len = m->m_pkthdr.len = len; 62688534Sjoerg schednetisr (NETISR_IP); 62788534Sjoerg inq = &ipintrq; 62888534Sjoerg } 62988534Sjoerg break; 63078064Sume#endif 63112495Speter#ifdef IPX 63212495Speter case PPP_IPX: 63312495Speter /* IPX IPXCP not implemented yet */ 63425944Sjoerg if (sp->pp_phase == PHASE_NETWORK) { 63512495Speter schednetisr (NETISR_IPX); 63612495Speter inq = &ipxintrq; 63712495Speter } 63888577Sjoerg do_account++; 63912495Speter break; 64012495Speter#endif 6414910Swollman#ifdef NS 6424910Swollman case PPP_XNS: 6434910Swollman /* XNS IDPCP not implemented yet */ 64425944Sjoerg if (sp->pp_phase == PHASE_NETWORK) { 6454910Swollman schednetisr (NETISR_NS); 6464910Swollman inq = &nsintrq; 6474910Swollman } 64888577Sjoerg do_account++; 6494910Swollman break; 6504910Swollman#endif 6514910Swollman } 6524910Swollman break; 6534910Swollman case CISCO_MULTICAST: 6544910Swollman case CISCO_UNICAST: 6554910Swollman /* Don't check the control field here (RFC 1547). */ 65645152Sphk if (sp->pp_mode != IFF_CISCO) { 65725944Sjoerg if (debug) 65825706Sjoerg log(LOG_DEBUG, 65940008Sjoerg SPP_FMT "Cisco packet in PPP mode " 66025706Sjoerg "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 66140008Sjoerg SPP_ARGS(ifp), 66225706Sjoerg h->address, h->control, ntohs(h->protocol)); 66311189Sjkh goto drop; 66411189Sjkh } 6654910Swollman switch (ntohs (h->protocol)) { 6664910Swollman default: 6674910Swollman ++ifp->if_noproto; 6684910Swollman goto invalid; 6694910Swollman case CISCO_KEEPALIVE: 6704910Swollman sppp_cisco_input ((struct sppp*) ifp, m); 6714910Swollman m_freem (m); 6724910Swollman return; 6734910Swollman#ifdef INET 6744910Swollman case ETHERTYPE_IP: 6754910Swollman schednetisr (NETISR_IP); 6764910Swollman inq = &ipintrq; 67788577Sjoerg do_account++; 6784910Swollman break; 6794910Swollman#endif 68054263Sshin#ifdef INET6 68154263Sshin case ETHERTYPE_IPV6: 68254263Sshin schednetisr (NETISR_IPV6); 68354263Sshin inq = &ip6intrq; 68488577Sjoerg do_account++; 68554263Sshin break; 68654263Sshin#endif 68712495Speter#ifdef IPX 68812495Speter case ETHERTYPE_IPX: 68912495Speter schednetisr (NETISR_IPX); 69012495Speter inq = &ipxintrq; 69188577Sjoerg do_account++; 69212495Speter break; 69312495Speter#endif 6944910Swollman#ifdef NS 6954910Swollman case ETHERTYPE_NS: 6964910Swollman schednetisr (NETISR_NS); 6974910Swollman inq = &nsintrq; 69888577Sjoerg do_account++; 6994910Swollman break; 7004910Swollman#endif 7014910Swollman } 7024910Swollman break; 70325944Sjoerg default: /* Invalid PPP packet. */ 70425944Sjoerg invalid: 70525944Sjoerg if (debug) 70625944Sjoerg log(LOG_DEBUG, 70740008Sjoerg SPP_FMT "invalid input packet " 70825944Sjoerg "<addr=0x%x ctrl=0x%x proto=0x%x>\n", 70940008Sjoerg SPP_ARGS(ifp), 71025944Sjoerg h->address, h->control, ntohs(h->protocol)); 71125944Sjoerg goto drop; 7124910Swollman } 7134910Swollman 7144910Swollman if (! (ifp->if_flags & IFF_UP) || ! inq) 7154910Swollman goto drop; 7164910Swollman 7174910Swollman /* Check queue. */ 71869152Sjlemon if (! IF_HANDOFF(inq, m, NULL)) { 71925944Sjoerg if (debug) 72040008Sjoerg log(LOG_DEBUG, SPP_FMT "protocol queue overflow\n", 72140008Sjoerg SPP_ARGS(ifp)); 7224910Swollman goto drop; 7234910Swollman } 72488577Sjoerg if (do_account) 72588577Sjoerg /* 72688577Sjoerg * Do only account for network packets, not for control 72788577Sjoerg * packets. This is used by some subsystems to detect 72888577Sjoerg * idle lines. 72988577Sjoerg */ 73088577Sjoerg sp->pp_last_recv = time_second; 7314910Swollman} 7324910Swollman 7334910Swollman/* 7344910Swollman * Enqueue transmit packet. 7354910Swollman */ 73612820Sphkstatic int 73725706Sjoergsppp_output(struct ifnet *ifp, struct mbuf *m, 73825706Sjoerg struct sockaddr *dst, struct rtentry *rt) 7394910Swollman{ 7404910Swollman struct sppp *sp = (struct sppp*) ifp; 7414910Swollman struct ppp_header *h; 74278064Sume struct ifqueue *ifq = NULL; 74325955Sjoerg int s, rv = 0; 74488534Sjoerg int ipproto = PPP_IP; 74542066Sphk int debug = ifp->if_flags & IFF_DEBUG; 7464910Swollman 74725944Sjoerg s = splimp(); 74825944Sjoerg 74925944Sjoerg if ((ifp->if_flags & IFF_UP) == 0 || 75025944Sjoerg (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) { 7514910Swollman m_freem (m); 7524910Swollman splx (s); 7534910Swollman return (ENETDOWN); 7544910Swollman } 7554910Swollman 75625944Sjoerg if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) { 75725944Sjoerg /* 75825944Sjoerg * Interface is not yet running, but auto-dial. Need 75925944Sjoerg * to start LCP for it. 76025944Sjoerg */ 76125944Sjoerg ifp->if_flags |= IFF_RUNNING; 76225944Sjoerg splx(s); 76325944Sjoerg lcp.Open(sp); 76425944Sjoerg s = splimp(); 76525944Sjoerg } 76625944Sjoerg 76778134Sume ifq = &ifp->if_snd; 7684910Swollman#ifdef INET 76912436Speter if (dst->sa_family == AF_INET) { 77040008Sjoerg /* XXX Check mbuf length here? */ 77112436Speter struct ip *ip = mtod (m, struct ip*); 77212436Speter struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl); 7734910Swollman 77442104Sphk /* 77542104Sphk * When using dynamic local IP address assignment by using 77642104Sphk * 0.0.0.0 as a local address, the first TCP session will 77742104Sphk * not connect because the local TCP checksum is computed 77842104Sphk * using 0.0.0.0 which will later become our real IP address 77942104Sphk * so the TCP checksum computed at the remote end will 78042104Sphk * become invalid. So we 78142104Sphk * - don't let packets with src ip addr 0 thru 78242104Sphk * - we flag TCP packets with src ip 0 as an error 78370199Sjhay */ 78442104Sphk 78542104Sphk if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */ 78642104Sphk { 78742104Sphk m_freem(m); 78842104Sphk splx(s); 78942104Sphk if(ip->ip_p == IPPROTO_TCP) 79042104Sphk return(EADDRNOTAVAIL); 79142104Sphk else 79242104Sphk return(0); 79342104Sphk } 79470199Sjhay 79542104Sphk /* 79642104Sphk * Put low delay, telnet, rlogin and ftp control packets 79742104Sphk * in front of the queue. 79842104Sphk */ 79969152Sjlemon if (_IF_QFULL(&sp->pp_fastq)) 80041686Sphk ; 80141686Sphk else if (ip->ip_tos & IPTOS_LOWDELAY) 80212436Speter ifq = &sp->pp_fastq; 80341686Sphk else if (m->m_len < sizeof *ip + sizeof *tcp) 80441686Sphk ; 80541686Sphk else if (ip->ip_p != IPPROTO_TCP) 80641686Sphk ; 80741686Sphk else if (INTERACTIVE (ntohs (tcp->th_sport))) 80841686Sphk ifq = &sp->pp_fastq; 80941686Sphk else if (INTERACTIVE (ntohs (tcp->th_dport))) 81041686Sphk ifq = &sp->pp_fastq; 81188534Sjoerg 81288534Sjoerg /* 81388534Sjoerg * Do IP Header compression 81488534Sjoerg */ 81588534Sjoerg if (sp->pp_mode != IFF_CISCO && (sp->ipcp.flags & IPCP_VJ) && 81688534Sjoerg ip->ip_p == IPPROTO_TCP) 81788534Sjoerg switch (sl_compress_tcp(m, ip, &sp->pp_comp, 81888534Sjoerg sp->ipcp.compress_cid)) { 81988534Sjoerg case TYPE_COMPRESSED_TCP: 82088534Sjoerg ipproto = PPP_VJ_COMP; 82188534Sjoerg break; 82288534Sjoerg case TYPE_UNCOMPRESSED_TCP: 82388534Sjoerg ipproto = PPP_VJ_UCOMP; 82488534Sjoerg break; 82588534Sjoerg case TYPE_IP: 82688534Sjoerg ipproto = PPP_IP; 82788534Sjoerg break; 82888534Sjoerg default: 82988534Sjoerg m_freem(m); 83088534Sjoerg splx(s); 83188534Sjoerg return (EINVAL); 83288534Sjoerg } 8334910Swollman } 8344910Swollman#endif 8354910Swollman 83678064Sume#ifdef INET6 83778064Sume if (dst->sa_family == AF_INET6) { 83878064Sume /* XXX do something tricky here? */ 83978064Sume } 84078064Sume#endif 84178064Sume 8424910Swollman /* 8434910Swollman * Prepend general data packet PPP header. For now, IP only. 8444910Swollman */ 8454910Swollman M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT); 8464910Swollman if (! m) { 84742066Sphk if (debug) 84840008Sjoerg log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n", 84940008Sjoerg SPP_ARGS(ifp)); 85025944Sjoerg ++ifp->if_oerrors; 8514910Swollman splx (s); 8524910Swollman return (ENOBUFS); 8534910Swollman } 85440008Sjoerg /* 85540008Sjoerg * May want to check size of packet 85640008Sjoerg * (albeit due to the implementation it's always enough) 85740008Sjoerg */ 8584910Swollman h = mtod (m, struct ppp_header*); 85945152Sphk if (sp->pp_mode == IFF_CISCO) { 86028088Skjc h->address = CISCO_UNICAST; /* unicast address */ 8614910Swollman h->control = 0; 8624910Swollman } else { 8634910Swollman h->address = PPP_ALLSTATIONS; /* broadcast address */ 8644910Swollman h->control = PPP_UI; /* Unnumbered Info */ 8654910Swollman } 8664910Swollman 8674910Swollman switch (dst->sa_family) { 8684910Swollman#ifdef INET 8694910Swollman case AF_INET: /* Internet Protocol */ 87045152Sphk if (sp->pp_mode == IFF_CISCO) 87111189Sjkh h->protocol = htons (ETHERTYPE_IP); 87211189Sjkh else { 87325955Sjoerg /* 87425955Sjoerg * Don't choke with an ENETDOWN early. It's 87525955Sjoerg * possible that we just started dialing out, 87625955Sjoerg * so don't drop the packet immediately. If 87725955Sjoerg * we notice that we run out of buffer space 87825955Sjoerg * below, we will however remember that we are 87925955Sjoerg * not ready to carry IP packets, and return 88025955Sjoerg * ENETDOWN, as opposed to ENOBUFS. 88125955Sjoerg */ 88288534Sjoerg h->protocol = htons(ipproto); 88325955Sjoerg if (sp->state[IDX_IPCP] != STATE_OPENED) 88425955Sjoerg rv = ENETDOWN; 88511189Sjkh } 8864910Swollman break; 8874910Swollman#endif 88854263Sshin#ifdef INET6 88954263Sshin case AF_INET6: /* Internet Protocol */ 89054263Sshin if (sp->pp_mode == IFF_CISCO) 89154263Sshin h->protocol = htons (ETHERTYPE_IPV6); 89254263Sshin else { 89378064Sume /* 89478064Sume * Don't choke with an ENETDOWN early. It's 89578064Sume * possible that we just started dialing out, 89678064Sume * so don't drop the packet immediately. If 89778064Sume * we notice that we run out of buffer space 89878064Sume * below, we will however remember that we are 89978064Sume * not ready to carry IP packets, and return 90078064Sume * ENETDOWN, as opposed to ENOBUFS. 90178064Sume */ 90278064Sume h->protocol = htons(PPP_IPV6); 90378064Sume if (sp->state[IDX_IPV6CP] != STATE_OPENED) 90478064Sume rv = ENETDOWN; 90554263Sshin } 90654263Sshin break; 90754263Sshin#endif 9084910Swollman#ifdef NS 9094910Swollman case AF_NS: /* Xerox NS Protocol */ 91045152Sphk h->protocol = htons (sp->pp_mode == IFF_CISCO ? 9114910Swollman ETHERTYPE_NS : PPP_XNS); 9124910Swollman break; 9134910Swollman#endif 91411819Sjulian#ifdef IPX 91512495Speter case AF_IPX: /* Novell IPX Protocol */ 91645152Sphk h->protocol = htons (sp->pp_mode == IFF_CISCO ? 91712495Speter ETHERTYPE_IPX : PPP_IPX); 91811819Sjulian break; 91911819Sjulian#endif 9204910Swollman default: 9214910Swollman m_freem (m); 92225944Sjoerg ++ifp->if_oerrors; 9234910Swollman splx (s); 9244910Swollman return (EAFNOSUPPORT); 9254910Swollman } 9264910Swollman 9274910Swollman /* 9284910Swollman * Queue message on interface, and start output if interface 92988577Sjoerg * not yet active. 9304910Swollman */ 93169152Sjlemon if (! IF_HANDOFF_ADJ(ifq, m, ifp, 3)) { 93225944Sjoerg ++ifp->if_oerrors; 93325955Sjoerg return (rv? rv: ENOBUFS); 9344910Swollman } 93588577Sjoerg /* 93688577Sjoerg * Unlike in sppp_input(), we can always bump the timestamp 93788577Sjoerg * here since sppp_output() is only called on behalf of 93888577Sjoerg * network-layer traffic; control-layer traffic is handled 93988577Sjoerg * by sppp_cp_send(). 94088577Sjoerg */ 94188577Sjoerg sp->pp_last_sent = time_second; 9424910Swollman return (0); 9434910Swollman} 9444910Swollman 94525706Sjoergvoid 94625706Sjoergsppp_attach(struct ifnet *ifp) 9474910Swollman{ 9484910Swollman struct sppp *sp = (struct sppp*) ifp; 9494910Swollman 9504910Swollman /* Initialize keepalive handler. */ 9514910Swollman if (! spppq) 95242064Sphk TIMEOUT(sppp_keepalive, 0, hz * 10, keepalive_ch); 9534910Swollman 9544910Swollman /* Insert new entry into the keepalive list. */ 9554910Swollman sp->pp_next = spppq; 9564910Swollman spppq = sp; 9574910Swollman 95842064Sphk sp->pp_if.if_mtu = PP_MTU; 95942064Sphk sp->pp_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 9604910Swollman sp->pp_if.if_type = IFT_PPP; 9614910Swollman sp->pp_if.if_output = sppp_output; 96242104Sphk#if 0 96342064Sphk sp->pp_flags = PP_KEEPALIVE; 96442104Sphk#endif 96570199Sjhay sp->pp_if.if_snd.ifq_maxlen = 32; 96670199Sjhay sp->pp_fastq.ifq_maxlen = 32; 96770199Sjhay sp->pp_cpq.ifq_maxlen = 20; 9684910Swollman sp->pp_loopcnt = 0; 9694910Swollman sp->pp_alivecnt = 0; 97078064Sume bzero(&sp->pp_seq[0], sizeof(sp->pp_seq)); 97178064Sume bzero(&sp->pp_rseq[0], sizeof(sp->pp_rseq)); 97225944Sjoerg sp->pp_phase = PHASE_DEAD; 97325944Sjoerg sp->pp_up = lcp.Up; 97425944Sjoerg sp->pp_down = lcp.Down; 97569152Sjlemon mtx_init(&sp->pp_cpq.ifq_mtx, "sppp_cpq", MTX_DEF); 97669152Sjlemon mtx_init(&sp->pp_fastq.ifq_mtx, "sppp_fastq", MTX_DEF); 97788534Sjoerg sp->enable_vj = 1; 97888577Sjoerg sp->pp_last_recv = sp->pp_last_sent = time_second; 97988534Sjoerg sl_compress_init(&sp->pp_comp, -1); 98025944Sjoerg sppp_lcp_init(sp); 98125944Sjoerg sppp_ipcp_init(sp); 98278064Sume sppp_ipv6cp_init(sp); 98330300Sjoerg sppp_pap_init(sp); 98430300Sjoerg sppp_chap_init(sp); 9854910Swollman} 9864910Swollman 98730300Sjoergvoid 98825706Sjoergsppp_detach(struct ifnet *ifp) 9894910Swollman{ 9904910Swollman struct sppp **q, *p, *sp = (struct sppp*) ifp; 99125944Sjoerg int i; 9924910Swollman 9934910Swollman /* Remove the entry from the keepalive list. */ 9944910Swollman for (q = &spppq; (p = *q); q = &p->pp_next) 9954910Swollman if (p == sp) { 9964910Swollman *q = p->pp_next; 9974910Swollman break; 9984910Swollman } 9994910Swollman 10004910Swollman /* Stop keepalive handler. */ 10014910Swollman if (! spppq) 100240008Sjoerg UNTIMEOUT(sppp_keepalive, 0, keepalive_ch); 100325944Sjoerg 100425944Sjoerg for (i = 0; i < IDX_COUNT; i++) 100540008Sjoerg UNTIMEOUT((cps[i])->TO, (void *)sp, sp->ch[i]); 100640008Sjoerg UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch); 100769152Sjlemon mtx_destroy(&sp->pp_cpq.ifq_mtx); 100869152Sjlemon mtx_destroy(&sp->pp_fastq.ifq_mtx); 10094910Swollman} 10104910Swollman 10114910Swollman/* 10124910Swollman * Flush the interface output queue. 10134910Swollman */ 101425706Sjoergvoid 101525706Sjoergsppp_flush(struct ifnet *ifp) 10164910Swollman{ 10174910Swollman struct sppp *sp = (struct sppp*) ifp; 10184910Swollman 101925944Sjoerg sppp_qflush (&sp->pp_if.if_snd); 102025944Sjoerg sppp_qflush (&sp->pp_fastq); 102126018Sjoerg sppp_qflush (&sp->pp_cpq); 10224910Swollman} 10234910Swollman 10244910Swollman/* 102511189Sjkh * Check if the output queue is empty. 102611189Sjkh */ 102712820Sphkint 102825706Sjoergsppp_isempty(struct ifnet *ifp) 102911189Sjkh{ 103011189Sjkh struct sppp *sp = (struct sppp*) ifp; 103125944Sjoerg int empty, s; 103211189Sjkh 103325944Sjoerg s = splimp(); 103426018Sjoerg empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head && 103526018Sjoerg !sp->pp_if.if_snd.ifq_head; 103625944Sjoerg splx(s); 103711189Sjkh return (empty); 103811189Sjkh} 103911189Sjkh 104011189Sjkh/* 10414910Swollman * Get next packet to send. 10424910Swollman */ 104325706Sjoergstruct mbuf * 104425706Sjoergsppp_dequeue(struct ifnet *ifp) 10454910Swollman{ 10464910Swollman struct sppp *sp = (struct sppp*) ifp; 10474910Swollman struct mbuf *m; 104825944Sjoerg int s; 10494910Swollman 105025944Sjoerg s = splimp(); 105126018Sjoerg /* 105230300Sjoerg * Process only the control protocol queue until we have at 105330300Sjoerg * least one NCP open. 105426018Sjoerg * 105526018Sjoerg * Do always serve all three queues in Cisco mode. 105626018Sjoerg */ 105726018Sjoerg IF_DEQUEUE(&sp->pp_cpq, m); 105826018Sjoerg if (m == NULL && 105945152Sphk (sppp_ncp_check(sp) || sp->pp_mode == IFF_CISCO)) { 106026018Sjoerg IF_DEQUEUE(&sp->pp_fastq, m); 106126018Sjoerg if (m == NULL) 106226018Sjoerg IF_DEQUEUE (&sp->pp_if.if_snd, m); 106326018Sjoerg } 106426018Sjoerg splx(s); 106526018Sjoerg return m; 10664910Swollman} 10674910Swollman 10684910Swollman/* 106930300Sjoerg * Pick the next packet, do not remove it from the queue. 107030300Sjoerg */ 107130300Sjoergstruct mbuf * 107230300Sjoergsppp_pick(struct ifnet *ifp) 107330300Sjoerg{ 107430300Sjoerg struct sppp *sp = (struct sppp*)ifp; 107530300Sjoerg struct mbuf *m; 107630300Sjoerg int s; 107730300Sjoerg 107830300Sjoerg s= splimp (); 107930300Sjoerg 108030300Sjoerg m = sp->pp_cpq.ifq_head; 108130300Sjoerg if (m == NULL && 108245152Sphk (sp->pp_phase == PHASE_NETWORK || sp->pp_mode == IFF_CISCO)) 108330300Sjoerg if ((m = sp->pp_fastq.ifq_head) == NULL) 108430300Sjoerg m = sp->pp_if.if_snd.ifq_head; 108530300Sjoerg splx (s); 108630300Sjoerg return (m); 108730300Sjoerg} 108830300Sjoerg 108930300Sjoerg/* 109025944Sjoerg * Process an ioctl request. Called on low priority level. 10914910Swollman */ 109225944Sjoergint 109342104Sphksppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data) 10944910Swollman{ 109525944Sjoerg struct ifreq *ifr = (struct ifreq*) data; 109625944Sjoerg struct sppp *sp = (struct sppp*) ifp; 109730300Sjoerg int s, rv, going_up, going_down, newmode; 10984910Swollman 109925944Sjoerg s = splimp(); 110030300Sjoerg rv = 0; 110125944Sjoerg switch (cmd) { 110225944Sjoerg case SIOCAIFADDR: 110325944Sjoerg case SIOCSIFDSTADDR: 110425944Sjoerg break; 11054910Swollman 110625944Sjoerg case SIOCSIFADDR: 110788503Sjoerg /* set the interface "up" when assigning an IP address */ 110888503Sjoerg ifp->if_flags |= IFF_UP; 110925944Sjoerg /* fall through... */ 111011189Sjkh 111125944Sjoerg case SIOCSIFFLAGS: 111225944Sjoerg going_up = ifp->if_flags & IFF_UP && 111325944Sjoerg (ifp->if_flags & IFF_RUNNING) == 0; 111425944Sjoerg going_down = (ifp->if_flags & IFF_UP) == 0 && 111525944Sjoerg ifp->if_flags & IFF_RUNNING; 111645152Sphk 111745152Sphk newmode = ifp->if_flags & IFF_PASSIVE; 111845152Sphk if (!newmode) 111945152Sphk newmode = ifp->if_flags & IFF_AUTO; 112045152Sphk if (!newmode) 112145152Sphk newmode = ifp->if_flags & IFF_CISCO; 112245152Sphk ifp->if_flags &= ~(IFF_PASSIVE | IFF_AUTO | IFF_CISCO); 112345152Sphk ifp->if_flags |= newmode; 112445152Sphk 112545152Sphk if (newmode != sp->pp_mode) { 112645152Sphk going_down = 1; 112745152Sphk if (!going_up) 112845152Sphk going_up = ifp->if_flags & IFF_RUNNING; 11294910Swollman } 11304910Swollman 113145152Sphk if (going_down) { 113270199Sjhay if (sp->pp_mode != IFF_CISCO) 113345152Sphk lcp.Close(sp); 113445152Sphk else if (sp->pp_tlf) 113545152Sphk (sp->pp_tlf)(sp); 113626018Sjoerg sppp_flush(ifp); 113725944Sjoerg ifp->if_flags &= ~IFF_RUNNING; 113845152Sphk sp->pp_mode = newmode; 113926018Sjoerg } 11404910Swollman 114145152Sphk if (going_up) { 114270199Sjhay if (sp->pp_mode != IFF_CISCO) 114345152Sphk lcp.Close(sp); 114445152Sphk sp->pp_mode = newmode; 114545152Sphk if (sp->pp_mode == 0) { 114645152Sphk ifp->if_flags |= IFF_RUNNING; 114745152Sphk lcp.Open(sp); 114845152Sphk } 114945152Sphk if (sp->pp_mode == IFF_CISCO) { 115045152Sphk if (sp->pp_tls) 115145152Sphk (sp->pp_tls)(sp); 115245152Sphk ifp->if_flags |= IFF_RUNNING; 115345152Sphk } 115445152Sphk } 115545152Sphk 11564910Swollman break; 115711189Sjkh 115825944Sjoerg#ifdef SIOCSIFMTU 115925944Sjoerg#ifndef ifr_mtu 116025944Sjoerg#define ifr_mtu ifr_metric 116125944Sjoerg#endif 116225944Sjoerg case SIOCSIFMTU: 116325944Sjoerg if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) 116425944Sjoerg return (EINVAL); 116525944Sjoerg ifp->if_mtu = ifr->ifr_mtu; 11664910Swollman break; 116725944Sjoerg#endif 116825944Sjoerg#ifdef SLIOCSETMTU 116925944Sjoerg case SLIOCSETMTU: 117025944Sjoerg if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) 117125944Sjoerg return (EINVAL); 117225944Sjoerg ifp->if_mtu = *(short*)data; 11734910Swollman break; 117425944Sjoerg#endif 117525944Sjoerg#ifdef SIOCGIFMTU 117625944Sjoerg case SIOCGIFMTU: 117725944Sjoerg ifr->ifr_mtu = ifp->if_mtu; 117811189Sjkh break; 117925944Sjoerg#endif 118025944Sjoerg#ifdef SLIOCGETMTU 118125944Sjoerg case SLIOCGETMTU: 118225944Sjoerg *(short*)data = ifp->if_mtu; 11834910Swollman break; 118425944Sjoerg#endif 118525944Sjoerg case SIOCADDMULTI: 118625944Sjoerg case SIOCDELMULTI: 11874910Swollman break; 118811189Sjkh 118930300Sjoerg case SIOCGIFGENERIC: 119030300Sjoerg case SIOCSIFGENERIC: 119130300Sjoerg rv = sppp_params(sp, cmd, data); 119230300Sjoerg break; 119330300Sjoerg 119425944Sjoerg default: 119530300Sjoerg rv = ENOTTY; 11964910Swollman } 119725944Sjoerg splx(s); 119830300Sjoerg return rv; 11994910Swollman} 12004910Swollman 120170199Sjhay/* 120225944Sjoerg * Cisco framing implementation. 120325944Sjoerg */ 120425944Sjoerg 12054910Swollman/* 12064910Swollman * Handle incoming Cisco keepalive protocol packets. 12074910Swollman */ 120830300Sjoergstatic void 120925706Sjoergsppp_cisco_input(struct sppp *sp, struct mbuf *m) 12104910Swollman{ 121125944Sjoerg STDDCL; 12124910Swollman struct cisco_packet *h; 121330300Sjoerg u_long me, mymask; 12144910Swollman 121527929Sitojun if (m->m_pkthdr.len < CISCO_PACKET_LEN) { 121625706Sjoerg if (debug) 121725706Sjoerg log(LOG_DEBUG, 121840008Sjoerg SPP_FMT "cisco invalid packet length: %d bytes\n", 121940008Sjoerg SPP_ARGS(ifp), m->m_pkthdr.len); 12204910Swollman return; 12214910Swollman } 12224910Swollman h = mtod (m, struct cisco_packet*); 122325706Sjoerg if (debug) 122425706Sjoerg log(LOG_DEBUG, 122540008Sjoerg SPP_FMT "cisco input: %d bytes " 122625706Sjoerg "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n", 122740008Sjoerg SPP_ARGS(ifp), m->m_pkthdr.len, 122840008Sjoerg (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel, 122940008Sjoerg (u_int)h->time0, (u_int)h->time1); 12304910Swollman switch (ntohl (h->type)) { 12314910Swollman default: 123225706Sjoerg if (debug) 123369211Sphk log(-1, SPP_FMT "cisco unknown packet type: 0x%lx\n", 123440008Sjoerg SPP_ARGS(ifp), (u_long)ntohl (h->type)); 12354910Swollman break; 12364910Swollman case CISCO_ADDR_REPLY: 12374910Swollman /* Reply on address request, ignore */ 12384910Swollman break; 12394910Swollman case CISCO_KEEPALIVE_REQ: 12404910Swollman sp->pp_alivecnt = 0; 124178064Sume sp->pp_rseq[IDX_LCP] = ntohl (h->par1); 124278064Sume if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) { 12434910Swollman /* Local and remote sequence numbers are equal. 12444910Swollman * Probably, the line is in loopback mode. */ 124511189Sjkh if (sp->pp_loopcnt >= MAXALIVECNT) { 124640008Sjoerg printf (SPP_FMT "loopback\n", 124740008Sjoerg SPP_ARGS(ifp)); 124811189Sjkh sp->pp_loopcnt = 0; 124911189Sjkh if (ifp->if_flags & IFF_UP) { 125011189Sjkh if_down (ifp); 125126018Sjoerg sppp_qflush (&sp->pp_cpq); 125211189Sjkh } 125311189Sjkh } 12544910Swollman ++sp->pp_loopcnt; 12554910Swollman 12564910Swollman /* Generate new local sequence number */ 125742065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 125878064Sume sp->pp_seq[IDX_LCP] = random(); 125940008Sjoerg#else 126078064Sume sp->pp_seq[IDX_LCP] ^= time.tv_sec ^ time.tv_usec; 126140008Sjoerg#endif 126211189Sjkh break; 126311189Sjkh } 126430300Sjoerg sp->pp_loopcnt = 0; 126511189Sjkh if (! (ifp->if_flags & IFF_UP) && 126611189Sjkh (ifp->if_flags & IFF_RUNNING)) { 126730300Sjoerg if_up(ifp); 126840008Sjoerg printf (SPP_FMT "up\n", SPP_ARGS(ifp)); 126911189Sjkh } 12704910Swollman break; 12714910Swollman case CISCO_ADDR_REQ: 127230300Sjoerg sppp_get_ip_addrs(sp, &me, 0, &mymask); 127330300Sjoerg if (me != 0L) 127430300Sjoerg sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask); 12754910Swollman break; 12764910Swollman } 12774910Swollman} 12784910Swollman 12794910Swollman/* 128025944Sjoerg * Send Cisco keepalive packet. 12814910Swollman */ 128212820Sphkstatic void 128325944Sjoergsppp_cisco_send(struct sppp *sp, int type, long par1, long par2) 128425944Sjoerg{ 128525944Sjoerg STDDCL; 128625944Sjoerg struct ppp_header *h; 128725944Sjoerg struct cisco_packet *ch; 128825944Sjoerg struct mbuf *m; 128942065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 129035029Sphk struct timeval tv; 129140008Sjoerg#else 129240008Sjoerg u_long t = (time.tv_sec - boottime.tv_sec) * 1000; 129340008Sjoerg#endif 129425944Sjoerg 129542065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 129636119Sphk getmicrouptime(&tv); 129740008Sjoerg#endif 129870199Sjhay 129925944Sjoerg MGETHDR (m, M_DONTWAIT, MT_DATA); 130025944Sjoerg if (! m) 130125944Sjoerg return; 130225944Sjoerg m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN; 130325944Sjoerg m->m_pkthdr.rcvif = 0; 130425944Sjoerg 130525944Sjoerg h = mtod (m, struct ppp_header*); 130625944Sjoerg h->address = CISCO_MULTICAST; 130725944Sjoerg h->control = 0; 130825944Sjoerg h->protocol = htons (CISCO_KEEPALIVE); 130925944Sjoerg 131025944Sjoerg ch = (struct cisco_packet*) (h + 1); 131125944Sjoerg ch->type = htonl (type); 131225944Sjoerg ch->par1 = htonl (par1); 131325944Sjoerg ch->par2 = htonl (par2); 131425944Sjoerg ch->rel = -1; 131540008Sjoerg 131642065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 131735029Sphk ch->time0 = htons ((u_short) (tv.tv_sec >> 16)); 131835029Sphk ch->time1 = htons ((u_short) tv.tv_sec); 131940008Sjoerg#else 132040008Sjoerg ch->time0 = htons ((u_short) (t >> 16)); 132140008Sjoerg ch->time1 = htons ((u_short) t); 132240008Sjoerg#endif 132325944Sjoerg 132425944Sjoerg if (debug) 132525944Sjoerg log(LOG_DEBUG, 132640008Sjoerg SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n", 132740008Sjoerg SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1, 132840008Sjoerg (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1); 132925944Sjoerg 133069152Sjlemon if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3)) 133169152Sjlemon ifp->if_oerrors++; 133225944Sjoerg} 133325944Sjoerg 133470199Sjhay/* 133525944Sjoerg * PPP protocol implementation. 133625944Sjoerg */ 133725944Sjoerg 133825944Sjoerg/* 133925944Sjoerg * Send PPP control protocol packet. 134025944Sjoerg */ 134125944Sjoergstatic void 134225706Sjoergsppp_cp_send(struct sppp *sp, u_short proto, u_char type, 134325706Sjoerg u_char ident, u_short len, void *data) 13444910Swollman{ 134525944Sjoerg STDDCL; 13464910Swollman struct ppp_header *h; 13474910Swollman struct lcp_header *lh; 13484910Swollman struct mbuf *m; 13494910Swollman 13504910Swollman if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) 13514910Swollman len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN; 13524910Swollman MGETHDR (m, M_DONTWAIT, MT_DATA); 13534910Swollman if (! m) 13544910Swollman return; 13554910Swollman m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len; 13564910Swollman m->m_pkthdr.rcvif = 0; 13574910Swollman 13584910Swollman h = mtod (m, struct ppp_header*); 13594910Swollman h->address = PPP_ALLSTATIONS; /* broadcast address */ 13604910Swollman h->control = PPP_UI; /* Unnumbered Info */ 13614910Swollman h->protocol = htons (proto); /* Link Control Protocol */ 13624910Swollman 13634910Swollman lh = (struct lcp_header*) (h + 1); 13644910Swollman lh->type = type; 13654910Swollman lh->ident = ident; 13664910Swollman lh->len = htons (LCP_HEADER_LEN + len); 13674910Swollman if (len) 13684910Swollman bcopy (data, lh+1, len); 13694910Swollman 137025706Sjoerg if (debug) { 137140008Sjoerg log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 137240008Sjoerg SPP_ARGS(ifp), 137325944Sjoerg sppp_proto_name(proto), 137425944Sjoerg sppp_cp_type_name (lh->type), lh->ident, 137525944Sjoerg ntohs (lh->len)); 137644145Sphk sppp_print_bytes ((u_char*) (lh+1), len); 137769211Sphk log(-1, ">\n"); 13784910Swollman } 137969152Sjlemon if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3)) 138069152Sjlemon ifp->if_oerrors++; 13814910Swollman} 13824910Swollman 13834910Swollman/* 138425944Sjoerg * Handle incoming PPP control protocol packets. 13854910Swollman */ 138612820Sphkstatic void 138725944Sjoergsppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m) 13884910Swollman{ 138925944Sjoerg STDDCL; 139025944Sjoerg struct lcp_header *h; 139125944Sjoerg int len = m->m_pkthdr.len; 139225944Sjoerg int rv; 139325944Sjoerg u_char *p; 13944910Swollman 139525944Sjoerg if (len < 4) { 139625944Sjoerg if (debug) 139725944Sjoerg log(LOG_DEBUG, 139840008Sjoerg SPP_FMT "%s invalid packet length: %d bytes\n", 139940008Sjoerg SPP_ARGS(ifp), cp->name, len); 14004910Swollman return; 140125944Sjoerg } 140225944Sjoerg h = mtod (m, struct lcp_header*); 140325944Sjoerg if (debug) { 140425944Sjoerg log(LOG_DEBUG, 140540008Sjoerg SPP_FMT "%s input(%s): <%s id=0x%x len=%d", 140640008Sjoerg SPP_ARGS(ifp), cp->name, 140725944Sjoerg sppp_state_name(sp->state[cp->protoidx]), 140825944Sjoerg sppp_cp_type_name (h->type), h->ident, ntohs (h->len)); 140944145Sphk sppp_print_bytes ((u_char*) (h+1), len-4); 141069211Sphk log(-1, ">\n"); 141125944Sjoerg } 141225944Sjoerg if (len > ntohs (h->len)) 141325944Sjoerg len = ntohs (h->len); 141430300Sjoerg p = (u_char *)(h + 1); 141525944Sjoerg switch (h->type) { 141625944Sjoerg case CONF_REQ: 141725944Sjoerg if (len < 4) { 141825944Sjoerg if (debug) 141969211Sphk log(-1, SPP_FMT "%s invalid conf-req length %d\n", 142040008Sjoerg SPP_ARGS(ifp), cp->name, 142125944Sjoerg len); 142225944Sjoerg ++ifp->if_ierrors; 142325944Sjoerg break; 142425944Sjoerg } 142530300Sjoerg /* handle states where RCR doesn't get a SCA/SCN */ 142630300Sjoerg switch (sp->state[cp->protoidx]) { 142730300Sjoerg case STATE_CLOSING: 142830300Sjoerg case STATE_STOPPING: 142930300Sjoerg return; 143030300Sjoerg case STATE_CLOSED: 143130300Sjoerg sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 143230300Sjoerg 0, 0); 143330300Sjoerg return; 143430300Sjoerg } 143525944Sjoerg rv = (cp->RCR)(sp, h, len); 143625944Sjoerg switch (sp->state[cp->protoidx]) { 143725944Sjoerg case STATE_OPENED: 143825944Sjoerg (cp->tld)(sp); 143925944Sjoerg (cp->scr)(sp); 144025944Sjoerg /* fall through... */ 144125944Sjoerg case STATE_ACK_SENT: 144225944Sjoerg case STATE_REQ_SENT: 144370199Sjhay /* 144470199Sjhay * sppp_cp_change_state() have the side effect of 144570199Sjhay * restarting the timeouts. We want to avoid that 144670199Sjhay * if the state don't change, otherwise we won't 144770199Sjhay * ever timeout and resend a configuration request 144870199Sjhay * that got lost. 144970199Sjhay */ 145070199Sjhay if (sp->state[cp->protoidx] == (rv ? STATE_ACK_SENT: 145170199Sjhay STATE_REQ_SENT)) 145270199Sjhay break; 145325944Sjoerg sppp_cp_change_state(cp, sp, rv? 145425944Sjoerg STATE_ACK_SENT: STATE_REQ_SENT); 145525944Sjoerg break; 145625944Sjoerg case STATE_STOPPED: 145725944Sjoerg sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 145825944Sjoerg (cp->scr)(sp); 145925944Sjoerg sppp_cp_change_state(cp, sp, rv? 146025944Sjoerg STATE_ACK_SENT: STATE_REQ_SENT); 146125944Sjoerg break; 146225944Sjoerg case STATE_ACK_RCVD: 146325944Sjoerg if (rv) { 146425944Sjoerg sppp_cp_change_state(cp, sp, STATE_OPENED); 146525944Sjoerg if (debug) 146640008Sjoerg log(LOG_DEBUG, SPP_FMT "%s tlu\n", 146740008Sjoerg SPP_ARGS(ifp), 146826077Sjoerg cp->name); 146925944Sjoerg (cp->tlu)(sp); 147025944Sjoerg } else 147125944Sjoerg sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 147225944Sjoerg break; 147325944Sjoerg default: 147440008Sjoerg printf(SPP_FMT "%s illegal %s in state %s\n", 147540008Sjoerg SPP_ARGS(ifp), cp->name, 147625944Sjoerg sppp_cp_type_name(h->type), 147725944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 147825944Sjoerg ++ifp->if_ierrors; 147925944Sjoerg } 148025944Sjoerg break; 148125944Sjoerg case CONF_ACK: 148225944Sjoerg if (h->ident != sp->confid[cp->protoidx]) { 148325944Sjoerg if (debug) 148469211Sphk log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 148540008Sjoerg SPP_ARGS(ifp), cp->name, 148625944Sjoerg h->ident, sp->confid[cp->protoidx]); 148725944Sjoerg ++ifp->if_ierrors; 148825944Sjoerg break; 148925944Sjoerg } 149025944Sjoerg switch (sp->state[cp->protoidx]) { 149125944Sjoerg case STATE_CLOSED: 149225944Sjoerg case STATE_STOPPED: 149325944Sjoerg sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 149425944Sjoerg break; 149525944Sjoerg case STATE_CLOSING: 149625944Sjoerg case STATE_STOPPING: 149725944Sjoerg break; 149825944Sjoerg case STATE_REQ_SENT: 149925944Sjoerg sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 150025944Sjoerg sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 150125944Sjoerg break; 150225944Sjoerg case STATE_OPENED: 150325944Sjoerg (cp->tld)(sp); 150425944Sjoerg /* fall through */ 150525944Sjoerg case STATE_ACK_RCVD: 150625944Sjoerg (cp->scr)(sp); 150725944Sjoerg sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 150825944Sjoerg break; 150925944Sjoerg case STATE_ACK_SENT: 151025944Sjoerg sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 151125944Sjoerg sppp_cp_change_state(cp, sp, STATE_OPENED); 151225944Sjoerg if (debug) 151340008Sjoerg log(LOG_DEBUG, SPP_FMT "%s tlu\n", 151440008Sjoerg SPP_ARGS(ifp), cp->name); 151525944Sjoerg (cp->tlu)(sp); 151625944Sjoerg break; 151725944Sjoerg default: 151840008Sjoerg printf(SPP_FMT "%s illegal %s in state %s\n", 151940008Sjoerg SPP_ARGS(ifp), cp->name, 152025944Sjoerg sppp_cp_type_name(h->type), 152125944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 152225944Sjoerg ++ifp->if_ierrors; 152325944Sjoerg } 152425944Sjoerg break; 152525944Sjoerg case CONF_NAK: 152625944Sjoerg case CONF_REJ: 152725944Sjoerg if (h->ident != sp->confid[cp->protoidx]) { 152825944Sjoerg if (debug) 152969211Sphk log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n", 153040008Sjoerg SPP_ARGS(ifp), cp->name, 153125944Sjoerg h->ident, sp->confid[cp->protoidx]); 153225944Sjoerg ++ifp->if_ierrors; 153325944Sjoerg break; 153425944Sjoerg } 153525944Sjoerg if (h->type == CONF_NAK) 153625944Sjoerg (cp->RCN_nak)(sp, h, len); 153725944Sjoerg else /* CONF_REJ */ 153825944Sjoerg (cp->RCN_rej)(sp, h, len); 15394910Swollman 154025944Sjoerg switch (sp->state[cp->protoidx]) { 154125944Sjoerg case STATE_CLOSED: 154225944Sjoerg case STATE_STOPPED: 154325944Sjoerg sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 154425944Sjoerg break; 154525944Sjoerg case STATE_REQ_SENT: 154625944Sjoerg case STATE_ACK_SENT: 154725944Sjoerg sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 154870199Sjhay /* 154970199Sjhay * Slow things down a bit if we think we might be 155070199Sjhay * in loopback. Depend on the timeout to send the 155170199Sjhay * next configuration request. 155270199Sjhay */ 155370199Sjhay if (sp->pp_loopcnt) 155470199Sjhay break; 155525944Sjoerg (cp->scr)(sp); 155625944Sjoerg break; 155725944Sjoerg case STATE_OPENED: 155825944Sjoerg (cp->tld)(sp); 155925944Sjoerg /* fall through */ 156025944Sjoerg case STATE_ACK_RCVD: 156152633Sjoerg sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 156225944Sjoerg (cp->scr)(sp); 156325944Sjoerg break; 156425944Sjoerg case STATE_CLOSING: 156525944Sjoerg case STATE_STOPPING: 156625944Sjoerg break; 156725944Sjoerg default: 156840008Sjoerg printf(SPP_FMT "%s illegal %s in state %s\n", 156940008Sjoerg SPP_ARGS(ifp), cp->name, 157025944Sjoerg sppp_cp_type_name(h->type), 157125944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 157225944Sjoerg ++ifp->if_ierrors; 157325944Sjoerg } 157425944Sjoerg break; 15754910Swollman 157625944Sjoerg case TERM_REQ: 157725944Sjoerg switch (sp->state[cp->protoidx]) { 157825944Sjoerg case STATE_ACK_RCVD: 157925944Sjoerg case STATE_ACK_SENT: 158025944Sjoerg sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 158125944Sjoerg /* fall through */ 158225944Sjoerg case STATE_CLOSED: 158325944Sjoerg case STATE_STOPPED: 158425944Sjoerg case STATE_CLOSING: 158525944Sjoerg case STATE_STOPPING: 158625944Sjoerg case STATE_REQ_SENT: 158725944Sjoerg sta: 158825944Sjoerg /* Send Terminate-Ack packet. */ 158925944Sjoerg if (debug) 159040008Sjoerg log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n", 159140008Sjoerg SPP_ARGS(ifp), cp->name); 159225944Sjoerg sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0); 159325944Sjoerg break; 159425944Sjoerg case STATE_OPENED: 159525944Sjoerg (cp->tld)(sp); 159625944Sjoerg sp->rst_counter[cp->protoidx] = 0; 159725944Sjoerg sppp_cp_change_state(cp, sp, STATE_STOPPING); 159825944Sjoerg goto sta; 159925944Sjoerg break; 160025944Sjoerg default: 160140008Sjoerg printf(SPP_FMT "%s illegal %s in state %s\n", 160240008Sjoerg SPP_ARGS(ifp), cp->name, 160325944Sjoerg sppp_cp_type_name(h->type), 160425944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 160525944Sjoerg ++ifp->if_ierrors; 160625944Sjoerg } 160725944Sjoerg break; 160825944Sjoerg case TERM_ACK: 160925944Sjoerg switch (sp->state[cp->protoidx]) { 161025944Sjoerg case STATE_CLOSED: 161125944Sjoerg case STATE_STOPPED: 161225944Sjoerg case STATE_REQ_SENT: 161325944Sjoerg case STATE_ACK_SENT: 161425944Sjoerg break; 161525944Sjoerg case STATE_CLOSING: 161641881Sphk sppp_cp_change_state(cp, sp, STATE_CLOSED); 161725944Sjoerg (cp->tlf)(sp); 161825944Sjoerg break; 161925944Sjoerg case STATE_STOPPING: 162041881Sphk sppp_cp_change_state(cp, sp, STATE_STOPPED); 162125944Sjoerg (cp->tlf)(sp); 162225944Sjoerg break; 162325944Sjoerg case STATE_ACK_RCVD: 162425944Sjoerg sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 162525944Sjoerg break; 162625944Sjoerg case STATE_OPENED: 162725944Sjoerg (cp->tld)(sp); 162825944Sjoerg (cp->scr)(sp); 162925944Sjoerg sppp_cp_change_state(cp, sp, STATE_ACK_RCVD); 163025944Sjoerg break; 163125944Sjoerg default: 163240008Sjoerg printf(SPP_FMT "%s illegal %s in state %s\n", 163340008Sjoerg SPP_ARGS(ifp), cp->name, 163425944Sjoerg sppp_cp_type_name(h->type), 163525944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 163625944Sjoerg ++ifp->if_ierrors; 163725944Sjoerg } 163825944Sjoerg break; 163925944Sjoerg case CODE_REJ: 164025944Sjoerg /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 164130300Sjoerg log(LOG_INFO, 164240008Sjoerg SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, " 164330300Sjoerg "danger will robinson\n", 164440008Sjoerg SPP_ARGS(ifp), cp->name, 164530300Sjoerg sppp_cp_type_name(h->type), ntohs(*((u_short *)p))); 164625944Sjoerg switch (sp->state[cp->protoidx]) { 164725944Sjoerg case STATE_CLOSED: 164825944Sjoerg case STATE_STOPPED: 164925944Sjoerg case STATE_REQ_SENT: 165025944Sjoerg case STATE_ACK_SENT: 165125944Sjoerg case STATE_CLOSING: 165225944Sjoerg case STATE_STOPPING: 165325944Sjoerg case STATE_OPENED: 165425944Sjoerg break; 165525944Sjoerg case STATE_ACK_RCVD: 165625944Sjoerg sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 165725944Sjoerg break; 165825944Sjoerg default: 165940008Sjoerg printf(SPP_FMT "%s illegal %s in state %s\n", 166040008Sjoerg SPP_ARGS(ifp), cp->name, 166125944Sjoerg sppp_cp_type_name(h->type), 166225944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 166325944Sjoerg ++ifp->if_ierrors; 166425944Sjoerg } 166525944Sjoerg break; 166680715Sume case PROTO_REJ: 166780715Sume { 166880715Sume int catastrophic; 166980715Sume const struct cp *upper; 167080715Sume int i; 167180715Sume u_int16_t proto; 167280715Sume 167380715Sume catastrophic = 0; 167480715Sume upper = NULL; 167580715Sume proto = ntohs(*((u_int16_t *)p)); 167680715Sume for (i = 0; i < IDX_COUNT; i++) { 167780715Sume if (cps[i]->proto == proto) { 167880715Sume upper = cps[i]; 167980715Sume break; 168080715Sume } 168180715Sume } 168280715Sume if (upper == NULL) 168380715Sume catastrophic++; 168480715Sume 168588508Sjoerg if (catastrophic || debug) 168688508Sjoerg log(catastrophic? LOG_INFO: LOG_DEBUG, 168788508Sjoerg SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n", 168888508Sjoerg SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+', 168988508Sjoerg sppp_cp_type_name(h->type), proto, 169088508Sjoerg upper ? upper->name : "unknown", 169188508Sjoerg upper ? sppp_state_name(sp->state[upper->protoidx]) : "?"); 169280715Sume 169380715Sume /* 169480715Sume * if we got RXJ+ against conf-req, the peer does not implement 169580715Sume * this particular protocol type. terminate the protocol. 169680715Sume */ 169780715Sume if (upper && !catastrophic) { 169880715Sume if (sp->state[upper->protoidx] == STATE_REQ_SENT) { 169980715Sume upper->Close(sp); 170080715Sume break; 170180715Sume } 170280715Sume } 170380715Sume 170480715Sume /* XXX catastrophic rejects (RXJ-) aren't handled yet. */ 170580715Sume switch (sp->state[cp->protoidx]) { 170680715Sume case STATE_CLOSED: 170780715Sume case STATE_STOPPED: 170880715Sume case STATE_REQ_SENT: 170980715Sume case STATE_ACK_SENT: 171080715Sume case STATE_CLOSING: 171180715Sume case STATE_STOPPING: 171280715Sume case STATE_OPENED: 171380715Sume break; 171480715Sume case STATE_ACK_RCVD: 171580715Sume sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 171680715Sume break; 171780715Sume default: 171880715Sume printf(SPP_FMT "%s illegal %s in state %s\n", 171980715Sume SPP_ARGS(ifp), cp->name, 172080715Sume sppp_cp_type_name(h->type), 172180715Sume sppp_state_name(sp->state[cp->protoidx])); 172280715Sume ++ifp->if_ierrors; 172380715Sume } 172480715Sume break; 172580715Sume } 172625944Sjoerg case DISC_REQ: 172725944Sjoerg if (cp->proto != PPP_LCP) 172825944Sjoerg goto illegal; 172925944Sjoerg /* Discard the packet. */ 173025944Sjoerg break; 173125944Sjoerg case ECHO_REQ: 173225944Sjoerg if (cp->proto != PPP_LCP) 173325944Sjoerg goto illegal; 173425944Sjoerg if (sp->state[cp->protoidx] != STATE_OPENED) { 173525944Sjoerg if (debug) 173669211Sphk log(-1, SPP_FMT "lcp echo req but lcp closed\n", 173740008Sjoerg SPP_ARGS(ifp)); 173825944Sjoerg ++ifp->if_ierrors; 173925944Sjoerg break; 174025944Sjoerg } 174125944Sjoerg if (len < 8) { 174225944Sjoerg if (debug) 174369211Sphk log(-1, SPP_FMT "invalid lcp echo request " 174425944Sjoerg "packet length: %d bytes\n", 174540008Sjoerg SPP_ARGS(ifp), len); 174625944Sjoerg break; 174725944Sjoerg } 174844145Sphk if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 174944145Sphk ntohl (*(long*)(h+1)) == sp->lcp.magic) { 175025944Sjoerg /* Line loopback mode detected. */ 175140008Sjoerg printf(SPP_FMT "loopback\n", SPP_ARGS(ifp)); 175270199Sjhay sp->pp_loopcnt = MAXALIVECNT * 5; 175325944Sjoerg if_down (ifp); 175426018Sjoerg sppp_qflush (&sp->pp_cpq); 17554910Swollman 175625944Sjoerg /* Shut down the PPP link. */ 175725944Sjoerg /* XXX */ 175825944Sjoerg lcp.Down(sp); 175925944Sjoerg lcp.Up(sp); 176025944Sjoerg break; 176125944Sjoerg } 176225944Sjoerg *(long*)(h+1) = htonl (sp->lcp.magic); 176325944Sjoerg if (debug) 176469211Sphk log(-1, SPP_FMT "got lcp echo req, sending echo rep\n", 176540008Sjoerg SPP_ARGS(ifp)); 176625944Sjoerg sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1); 176725944Sjoerg break; 176825944Sjoerg case ECHO_REPLY: 176925944Sjoerg if (cp->proto != PPP_LCP) 177025944Sjoerg goto illegal; 177125944Sjoerg if (h->ident != sp->lcp.echoid) { 177225944Sjoerg ++ifp->if_ierrors; 177325944Sjoerg break; 177425944Sjoerg } 177525944Sjoerg if (len < 8) { 177625944Sjoerg if (debug) 177769211Sphk log(-1, SPP_FMT "lcp invalid echo reply " 177825944Sjoerg "packet length: %d bytes\n", 177940008Sjoerg SPP_ARGS(ifp), len); 178025944Sjoerg break; 178125944Sjoerg } 178225944Sjoerg if (debug) 178369211Sphk log(-1, SPP_FMT "lcp got echo rep\n", 178440008Sjoerg SPP_ARGS(ifp)); 178544145Sphk if (!(sp->lcp.opts & (1 << LCP_OPT_MAGIC)) || 178644145Sphk ntohl (*(long*)(h+1)) != sp->lcp.magic) 178725944Sjoerg sp->pp_alivecnt = 0; 178825944Sjoerg break; 178925944Sjoerg default: 179025944Sjoerg /* Unknown packet type -- send Code-Reject packet. */ 179125944Sjoerg illegal: 179225944Sjoerg if (debug) 179369211Sphk log(-1, SPP_FMT "%s send code-rej for 0x%x\n", 179440008Sjoerg SPP_ARGS(ifp), cp->name, h->type); 179578064Sume sppp_cp_send(sp, cp->proto, CODE_REJ, 179678064Sume ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h); 179725944Sjoerg ++ifp->if_ierrors; 179825944Sjoerg } 17994910Swollman} 18004910Swollman 180125944Sjoerg 18024910Swollman/* 180325944Sjoerg * The generic part of all Up/Down/Open/Close/TO event handlers. 180425944Sjoerg * Basically, the state transition handling in the automaton. 18054910Swollman */ 180625944Sjoergstatic void 180725944Sjoergsppp_up_event(const struct cp *cp, struct sppp *sp) 18084910Swollman{ 180925944Sjoerg STDDCL; 18104910Swollman 181125944Sjoerg if (debug) 181240008Sjoerg log(LOG_DEBUG, SPP_FMT "%s up(%s)\n", 181340008Sjoerg SPP_ARGS(ifp), cp->name, 181425944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 181525944Sjoerg 181625944Sjoerg switch (sp->state[cp->protoidx]) { 181725944Sjoerg case STATE_INITIAL: 181825944Sjoerg sppp_cp_change_state(cp, sp, STATE_CLOSED); 181925944Sjoerg break; 182025944Sjoerg case STATE_STARTING: 182125944Sjoerg sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 182225944Sjoerg (cp->scr)(sp); 182325944Sjoerg sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 182425944Sjoerg break; 18254910Swollman default: 182640008Sjoerg printf(SPP_FMT "%s illegal up in state %s\n", 182740008Sjoerg SPP_ARGS(ifp), cp->name, 182825944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 182925944Sjoerg } 183025944Sjoerg} 18314910Swollman 183225944Sjoergstatic void 183325944Sjoergsppp_down_event(const struct cp *cp, struct sppp *sp) 183425944Sjoerg{ 183525944Sjoerg STDDCL; 183625944Sjoerg 183725944Sjoerg if (debug) 183840008Sjoerg log(LOG_DEBUG, SPP_FMT "%s down(%s)\n", 183940008Sjoerg SPP_ARGS(ifp), cp->name, 184025944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 184125944Sjoerg 184225944Sjoerg switch (sp->state[cp->protoidx]) { 184325944Sjoerg case STATE_CLOSED: 184425944Sjoerg case STATE_CLOSING: 184525944Sjoerg sppp_cp_change_state(cp, sp, STATE_INITIAL); 18464910Swollman break; 184725944Sjoerg case STATE_STOPPED: 184841881Sphk sppp_cp_change_state(cp, sp, STATE_STARTING); 184925944Sjoerg (cp->tls)(sp); 185041881Sphk break; 185125944Sjoerg case STATE_STOPPING: 185225944Sjoerg case STATE_REQ_SENT: 185325944Sjoerg case STATE_ACK_RCVD: 185425944Sjoerg case STATE_ACK_SENT: 185525944Sjoerg sppp_cp_change_state(cp, sp, STATE_STARTING); 185625944Sjoerg break; 185725944Sjoerg case STATE_OPENED: 185825944Sjoerg (cp->tld)(sp); 185925944Sjoerg sppp_cp_change_state(cp, sp, STATE_STARTING); 186025944Sjoerg break; 186125944Sjoerg default: 186240008Sjoerg printf(SPP_FMT "%s illegal down in state %s\n", 186340008Sjoerg SPP_ARGS(ifp), cp->name, 186425944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 186525944Sjoerg } 186625944Sjoerg} 18674910Swollman 186811189Sjkh 186925944Sjoergstatic void 187025944Sjoergsppp_open_event(const struct cp *cp, struct sppp *sp) 187125944Sjoerg{ 187225944Sjoerg STDDCL; 187325944Sjoerg 187425944Sjoerg if (debug) 187540008Sjoerg log(LOG_DEBUG, SPP_FMT "%s open(%s)\n", 187640008Sjoerg SPP_ARGS(ifp), cp->name, 187725944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 187825944Sjoerg 187925944Sjoerg switch (sp->state[cp->protoidx]) { 188025944Sjoerg case STATE_INITIAL: 188141881Sphk sppp_cp_change_state(cp, sp, STATE_STARTING); 188225944Sjoerg (cp->tls)(sp); 18834910Swollman break; 188425944Sjoerg case STATE_STARTING: 188525944Sjoerg break; 188625944Sjoerg case STATE_CLOSED: 188725944Sjoerg sp->rst_counter[cp->protoidx] = sp->lcp.max_configure; 188825944Sjoerg (cp->scr)(sp); 188925944Sjoerg sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 189025944Sjoerg break; 189125944Sjoerg case STATE_STOPPED: 189274703Sjoerg /* 189374703Sjoerg * Try escaping stopped state. This seems to bite 189474703Sjoerg * people occasionally, in particular for IPCP, 189574703Sjoerg * presumably following previous IPCP negotiation 189674703Sjoerg * aborts. Somehow, we must have missed a Down event 189774703Sjoerg * which would have caused a transition into starting 189874703Sjoerg * state, so as a bandaid we force the Down event now. 189974703Sjoerg * This effectively implements (something like the) 190074703Sjoerg * `restart' option mentioned in the state transition 190174703Sjoerg * table of RFC 1661. 190274703Sjoerg */ 190374703Sjoerg sppp_cp_change_state(cp, sp, STATE_STARTING); 190474703Sjoerg (cp->tls)(sp); 190574703Sjoerg break; 190625944Sjoerg case STATE_STOPPING: 190725944Sjoerg case STATE_REQ_SENT: 190825944Sjoerg case STATE_ACK_RCVD: 190925944Sjoerg case STATE_ACK_SENT: 191025944Sjoerg case STATE_OPENED: 191125944Sjoerg break; 191225944Sjoerg case STATE_CLOSING: 191325944Sjoerg sppp_cp_change_state(cp, sp, STATE_STOPPING); 191425944Sjoerg break; 191525944Sjoerg } 191625944Sjoerg} 19174910Swollman 191825944Sjoerg 191925944Sjoergstatic void 192025944Sjoergsppp_close_event(const struct cp *cp, struct sppp *sp) 192125944Sjoerg{ 192225944Sjoerg STDDCL; 192325944Sjoerg 192425944Sjoerg if (debug) 192540008Sjoerg log(LOG_DEBUG, SPP_FMT "%s close(%s)\n", 192640008Sjoerg SPP_ARGS(ifp), cp->name, 192725944Sjoerg sppp_state_name(sp->state[cp->protoidx])); 192825944Sjoerg 192925944Sjoerg switch (sp->state[cp->protoidx]) { 193025944Sjoerg case STATE_INITIAL: 193125944Sjoerg case STATE_CLOSED: 193225944Sjoerg case STATE_CLOSING: 19334910Swollman break; 193425944Sjoerg case STATE_STARTING: 193541881Sphk sppp_cp_change_state(cp, sp, STATE_INITIAL); 193625944Sjoerg (cp->tlf)(sp); 19374910Swollman break; 193825944Sjoerg case STATE_STOPPED: 193925944Sjoerg sppp_cp_change_state(cp, sp, STATE_CLOSED); 19404910Swollman break; 194125944Sjoerg case STATE_STOPPING: 194225944Sjoerg sppp_cp_change_state(cp, sp, STATE_CLOSING); 19434910Swollman break; 194425944Sjoerg case STATE_OPENED: 194525944Sjoerg (cp->tld)(sp); 194625944Sjoerg /* fall through */ 194725944Sjoerg case STATE_REQ_SENT: 194825944Sjoerg case STATE_ACK_RCVD: 194925944Sjoerg case STATE_ACK_SENT: 195025944Sjoerg sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate; 195178064Sume sppp_cp_send(sp, cp->proto, TERM_REQ, 195278064Sume ++sp->pp_seq[cp->protoidx], 0, 0); 195325944Sjoerg sppp_cp_change_state(cp, sp, STATE_CLOSING); 19544910Swollman break; 19554910Swollman } 19564910Swollman} 19574910Swollman 195825944Sjoergstatic void 195925944Sjoergsppp_to_event(const struct cp *cp, struct sppp *sp) 196025944Sjoerg{ 196125944Sjoerg STDDCL; 196225944Sjoerg int s; 196325944Sjoerg 196425944Sjoerg s = splimp(); 196525944Sjoerg if (debug) 196640008Sjoerg log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n", 196740008Sjoerg SPP_ARGS(ifp), cp->name, 196825944Sjoerg sppp_state_name(sp->state[cp->protoidx]), 196925944Sjoerg sp->rst_counter[cp->protoidx]); 197025944Sjoerg 197125944Sjoerg if (--sp->rst_counter[cp->protoidx] < 0) 197225944Sjoerg /* TO- event */ 197325944Sjoerg switch (sp->state[cp->protoidx]) { 197425944Sjoerg case STATE_CLOSING: 197541881Sphk sppp_cp_change_state(cp, sp, STATE_CLOSED); 197625944Sjoerg (cp->tlf)(sp); 197725944Sjoerg break; 197825944Sjoerg case STATE_STOPPING: 197941881Sphk sppp_cp_change_state(cp, sp, STATE_STOPPED); 198025944Sjoerg (cp->tlf)(sp); 198125944Sjoerg break; 198225944Sjoerg case STATE_REQ_SENT: 198325944Sjoerg case STATE_ACK_RCVD: 198425944Sjoerg case STATE_ACK_SENT: 198541881Sphk sppp_cp_change_state(cp, sp, STATE_STOPPED); 198625944Sjoerg (cp->tlf)(sp); 198725944Sjoerg break; 198825944Sjoerg } 198925944Sjoerg else 199025944Sjoerg /* TO+ event */ 199125944Sjoerg switch (sp->state[cp->protoidx]) { 199225944Sjoerg case STATE_CLOSING: 199325944Sjoerg case STATE_STOPPING: 199478064Sume sppp_cp_send(sp, cp->proto, TERM_REQ, 199578064Sume ++sp->pp_seq[cp->protoidx], 0, 0); 199670199Sjhay TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout, 199742064Sphk sp->ch[cp->protoidx]); 199825944Sjoerg break; 199925944Sjoerg case STATE_REQ_SENT: 200025944Sjoerg case STATE_ACK_RCVD: 200125944Sjoerg (cp->scr)(sp); 200225944Sjoerg /* sppp_cp_change_state() will restart the timer */ 200325944Sjoerg sppp_cp_change_state(cp, sp, STATE_REQ_SENT); 200425944Sjoerg break; 200525944Sjoerg case STATE_ACK_SENT: 200625944Sjoerg (cp->scr)(sp); 200742064Sphk TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout, 200842064Sphk sp->ch[cp->protoidx]); 200925944Sjoerg break; 201025944Sjoerg } 201125944Sjoerg 201225944Sjoerg splx(s); 201325944Sjoerg} 201425944Sjoerg 201511189Sjkh/* 201625944Sjoerg * Change the state of a control protocol in the state automaton. 201725944Sjoerg * Takes care of starting/stopping the restart timer. 201811189Sjkh */ 201925944Sjoergvoid 202025944Sjoergsppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate) 202125944Sjoerg{ 202225944Sjoerg sp->state[cp->protoidx] = newstate; 202325944Sjoerg 202440008Sjoerg UNTIMEOUT(cp->TO, (void *)sp, sp->ch[cp->protoidx]); 202525944Sjoerg switch (newstate) { 202625944Sjoerg case STATE_INITIAL: 202725944Sjoerg case STATE_STARTING: 202825944Sjoerg case STATE_CLOSED: 202925944Sjoerg case STATE_STOPPED: 203025944Sjoerg case STATE_OPENED: 203125944Sjoerg break; 203225944Sjoerg case STATE_CLOSING: 203325944Sjoerg case STATE_STOPPING: 203425944Sjoerg case STATE_REQ_SENT: 203525944Sjoerg case STATE_ACK_RCVD: 203625944Sjoerg case STATE_ACK_SENT: 203770199Sjhay TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout, 203842064Sphk sp->ch[cp->protoidx]); 203925944Sjoerg break; 204025944Sjoerg } 204125944Sjoerg} 204270199Sjhay 204370199Sjhay/* 204425944Sjoerg *--------------------------------------------------------------------------* 204525944Sjoerg * * 204625944Sjoerg * The LCP implementation. * 204725944Sjoerg * * 204825944Sjoerg *--------------------------------------------------------------------------* 204925944Sjoerg */ 205025944Sjoergstatic void 205125944Sjoergsppp_lcp_init(struct sppp *sp) 205225944Sjoerg{ 205325944Sjoerg sp->lcp.opts = (1 << LCP_OPT_MAGIC); 205425944Sjoerg sp->lcp.magic = 0; 205525944Sjoerg sp->state[IDX_LCP] = STATE_INITIAL; 205625944Sjoerg sp->fail_counter[IDX_LCP] = 0; 205778064Sume sp->pp_seq[IDX_LCP] = 0; 205878064Sume sp->pp_rseq[IDX_LCP] = 0; 205925944Sjoerg sp->lcp.protos = 0; 206025944Sjoerg sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 206130300Sjoerg 206244145Sphk /* Note that these values are relevant for all control protocols */ 206344145Sphk sp->lcp.timeout = 3 * hz; 206425944Sjoerg sp->lcp.max_terminate = 2; 206525944Sjoerg sp->lcp.max_configure = 10; 206625944Sjoerg sp->lcp.max_failure = 10; 206742065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 206830300Sjoerg callout_handle_init(&sp->ch[IDX_LCP]); 206940008Sjoerg#endif 207025944Sjoerg} 207125944Sjoerg 207225944Sjoergstatic void 207325944Sjoergsppp_lcp_up(struct sppp *sp) 207425944Sjoerg{ 207525944Sjoerg STDDCL; 207625944Sjoerg 207770199Sjhay sp->pp_alivecnt = 0; 207870199Sjhay sp->lcp.opts = (1 << LCP_OPT_MAGIC); 207970199Sjhay sp->lcp.magic = 0; 208070199Sjhay sp->lcp.protos = 0; 208170199Sjhay sp->lcp.mru = sp->lcp.their_mru = PP_MTU; 208225944Sjoerg /* 208375321Sjoerg * If we are authenticator, negotiate LCP_AUTH 208475321Sjoerg */ 208575321Sjoerg if (sp->hisauth.proto != 0) 208675321Sjoerg sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO); 208775321Sjoerg else 208875321Sjoerg sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 208975321Sjoerg sp->pp_flags &= ~PP_NEEDAUTH; 209075321Sjoerg /* 209130300Sjoerg * If this interface is passive or dial-on-demand, and we are 209230300Sjoerg * still in Initial state, it means we've got an incoming 209330300Sjoerg * call. Activate the interface. 209425944Sjoerg */ 209525944Sjoerg if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) { 209625944Sjoerg if (debug) 209725944Sjoerg log(LOG_DEBUG, 209840008Sjoerg SPP_FMT "Up event", SPP_ARGS(ifp)); 209925944Sjoerg ifp->if_flags |= IFF_RUNNING; 210030300Sjoerg if (sp->state[IDX_LCP] == STATE_INITIAL) { 210130300Sjoerg if (debug) 210269211Sphk log(-1, "(incoming call)\n"); 210330300Sjoerg sp->pp_flags |= PP_CALLIN; 210430300Sjoerg lcp.Open(sp); 210530300Sjoerg } else if (debug) 210669211Sphk log(-1, "\n"); 210725944Sjoerg } 210825944Sjoerg 210925944Sjoerg sppp_up_event(&lcp, sp); 211025944Sjoerg} 211125944Sjoerg 211225944Sjoergstatic void 211325944Sjoergsppp_lcp_down(struct sppp *sp) 211425944Sjoerg{ 211525944Sjoerg STDDCL; 211625944Sjoerg 211725944Sjoerg sppp_down_event(&lcp, sp); 211825944Sjoerg 211925944Sjoerg /* 212025944Sjoerg * If this is neither a dial-on-demand nor a passive 212125944Sjoerg * interface, simulate an ``ifconfig down'' action, so the 212225944Sjoerg * administrator can force a redial by another ``ifconfig 212325944Sjoerg * up''. XXX For leased line operation, should we immediately 212425944Sjoerg * try to reopen the connection here? 212525944Sjoerg */ 212625944Sjoerg if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) { 212725944Sjoerg log(LOG_INFO, 212842066Sphk SPP_FMT "Down event, taking interface down.\n", 212940008Sjoerg SPP_ARGS(ifp)); 213025944Sjoerg if_down(ifp); 213125944Sjoerg } else { 213225944Sjoerg if (debug) 213325944Sjoerg log(LOG_DEBUG, 213440008Sjoerg SPP_FMT "Down event (carrier loss)\n", 213540008Sjoerg SPP_ARGS(ifp)); 213670199Sjhay sp->pp_flags &= ~PP_CALLIN; 213770199Sjhay if (sp->state[IDX_LCP] != STATE_INITIAL) 213870199Sjhay lcp.Close(sp); 213970199Sjhay ifp->if_flags &= ~IFF_RUNNING; 214025944Sjoerg } 214125944Sjoerg} 214225944Sjoerg 214325944Sjoergstatic void 214425944Sjoergsppp_lcp_open(struct sppp *sp) 214525944Sjoerg{ 214625944Sjoerg sppp_open_event(&lcp, sp); 214725944Sjoerg} 214825944Sjoerg 214925944Sjoergstatic void 215025944Sjoergsppp_lcp_close(struct sppp *sp) 215125944Sjoerg{ 215225944Sjoerg sppp_close_event(&lcp, sp); 215325944Sjoerg} 215425944Sjoerg 215525944Sjoergstatic void 215625944Sjoergsppp_lcp_TO(void *cookie) 215725944Sjoerg{ 215825944Sjoerg sppp_to_event(&lcp, (struct sppp *)cookie); 215925944Sjoerg} 216025944Sjoerg 216125944Sjoerg/* 216225944Sjoerg * Analyze a configure request. Return true if it was agreeable, and 216325944Sjoerg * caused action sca, false if it has been rejected or nak'ed, and 216425944Sjoerg * caused action scn. (The return value is used to make the state 216525944Sjoerg * transition decision in the state automaton.) 216625944Sjoerg */ 216712820Sphkstatic int 216825944Sjoergsppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 21694910Swollman{ 217025944Sjoerg STDDCL; 217111189Sjkh u_char *buf, *r, *p; 217225944Sjoerg int origlen, rlen; 217325944Sjoerg u_long nmagic; 217430300Sjoerg u_short authproto; 21754910Swollman 217611189Sjkh len -= 4; 217725944Sjoerg origlen = len; 217811189Sjkh buf = r = malloc (len, M_TEMP, M_NOWAIT); 217911189Sjkh if (! buf) 218011189Sjkh return (0); 21814910Swollman 218225706Sjoerg if (debug) 218340008Sjoerg log(LOG_DEBUG, SPP_FMT "lcp parse opts: ", 218440008Sjoerg SPP_ARGS(ifp)); 218525706Sjoerg 218625944Sjoerg /* pass 1: check for things that need to be rejected */ 218711189Sjkh p = (void*) (h+1); 218811189Sjkh for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 218925944Sjoerg if (debug) 219069211Sphk log(-1, " %s ", sppp_lcp_opt_name(*p)); 219111189Sjkh switch (*p) { 219211189Sjkh case LCP_OPT_MAGIC: 219325944Sjoerg /* Magic number. */ 219470199Sjhay if (len >= 6 && p[1] == 6) 219570199Sjhay continue; 219670199Sjhay if (debug) 219770199Sjhay log(-1, "[invalid] "); 219870199Sjhay break; 219925944Sjoerg case LCP_OPT_ASYNC_MAP: 220025944Sjoerg /* Async control character map. */ 220170199Sjhay if (len >= 6 && p[1] == 6) 220225944Sjoerg continue; 220325944Sjoerg if (debug) 220469211Sphk log(-1, "[invalid] "); 220525944Sjoerg break; 220625944Sjoerg case LCP_OPT_MRU: 220725944Sjoerg /* Maximum receive unit. */ 220825944Sjoerg if (len >= 4 && p[1] == 4) 220925944Sjoerg continue; 221025944Sjoerg if (debug) 221169211Sphk log(-1, "[invalid] "); 221225944Sjoerg break; 221330300Sjoerg case LCP_OPT_AUTH_PROTO: 221430300Sjoerg if (len < 4) { 221530300Sjoerg if (debug) 221669211Sphk log(-1, "[invalid] "); 221730300Sjoerg break; 221830300Sjoerg } 221930300Sjoerg authproto = (p[2] << 8) + p[3]; 222030300Sjoerg if (authproto == PPP_CHAP && p[1] != 5) { 222130300Sjoerg if (debug) 222269211Sphk log(-1, "[invalid chap len] "); 222330300Sjoerg break; 222430300Sjoerg } 222530300Sjoerg if (sp->myauth.proto == 0) { 222630300Sjoerg /* we are not configured to do auth */ 222730300Sjoerg if (debug) 222869211Sphk log(-1, "[not configured] "); 222930300Sjoerg break; 223030300Sjoerg } 223130300Sjoerg /* 223230300Sjoerg * Remote want us to authenticate, remember this, 223330300Sjoerg * so we stay in PHASE_AUTHENTICATE after LCP got 223430300Sjoerg * up. 223530300Sjoerg */ 223630300Sjoerg sp->pp_flags |= PP_NEEDAUTH; 223730300Sjoerg continue; 223825944Sjoerg default: 223925944Sjoerg /* Others not supported. */ 224025944Sjoerg if (debug) 224169211Sphk log(-1, "[rej] "); 224225944Sjoerg break; 224325944Sjoerg } 224425944Sjoerg /* Add the option to rejected list. */ 224525944Sjoerg bcopy (p, r, p[1]); 224625944Sjoerg r += p[1]; 224725944Sjoerg rlen += p[1]; 224825944Sjoerg } 224925944Sjoerg if (rlen) { 225025944Sjoerg if (debug) 225169211Sphk log(-1, " send conf-rej\n"); 225225944Sjoerg sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 225325944Sjoerg return 0; 225425944Sjoerg } else if (debug) 225569211Sphk log(-1, "\n"); 225625944Sjoerg 225725944Sjoerg /* 225825944Sjoerg * pass 2: check for option values that are unacceptable and 225925944Sjoerg * thus require to be nak'ed. 226025944Sjoerg */ 226125944Sjoerg if (debug) 226240008Sjoerg log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ", 226340008Sjoerg SPP_ARGS(ifp)); 226425944Sjoerg 226525944Sjoerg p = (void*) (h+1); 226625944Sjoerg len = origlen; 226725944Sjoerg for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 226825944Sjoerg if (debug) 226969211Sphk log(-1, " %s ", sppp_lcp_opt_name(*p)); 227025944Sjoerg switch (*p) { 227125944Sjoerg case LCP_OPT_MAGIC: 227211189Sjkh /* Magic number -- extract. */ 227325944Sjoerg nmagic = (u_long)p[2] << 24 | 227425944Sjoerg (u_long)p[3] << 16 | p[4] << 8 | p[5]; 227525944Sjoerg if (nmagic != sp->lcp.magic) { 227670199Sjhay sp->pp_loopcnt = 0; 227725706Sjoerg if (debug) 227869211Sphk log(-1, "0x%lx ", nmagic); 227911189Sjkh continue; 228011189Sjkh } 228170199Sjhay if (debug && sp->pp_loopcnt < MAXALIVECNT*5) 228269211Sphk log(-1, "[glitch] "); 228325944Sjoerg ++sp->pp_loopcnt; 228425944Sjoerg /* 228525944Sjoerg * We negate our magic here, and NAK it. If 228625944Sjoerg * we see it later in an NAK packet, we 228725944Sjoerg * suggest a new one. 228825944Sjoerg */ 228925944Sjoerg nmagic = ~sp->lcp.magic; 229025944Sjoerg /* Gonna NAK it. */ 229125944Sjoerg p[2] = nmagic >> 24; 229225944Sjoerg p[3] = nmagic >> 16; 229325944Sjoerg p[4] = nmagic >> 8; 229425944Sjoerg p[5] = nmagic; 229511189Sjkh break; 229625944Sjoerg 229711189Sjkh case LCP_OPT_ASYNC_MAP: 229888506Sjoerg /* 229988506Sjoerg * Async control character map -- just ignore it. 230088506Sjoerg * 230188506Sjoerg * Quote from RFC 1662, chapter 6: 230288506Sjoerg * To enable this functionality, synchronous PPP 230388506Sjoerg * implementations MUST always respond to the 230488506Sjoerg * Async-Control-Character-Map Configuration 230588506Sjoerg * Option with the LCP Configure-Ack. However, 230688506Sjoerg * acceptance of the Configuration Option does 230788506Sjoerg * not imply that the synchronous implementation 230888506Sjoerg * will do any ACCM mapping. Instead, all such 230988506Sjoerg * octet mapping will be performed by the 231088506Sjoerg * asynchronous-to-synchronous converter. 231188506Sjoerg */ 231288506Sjoerg continue; 231325944Sjoerg 231411189Sjkh case LCP_OPT_MRU: 231525944Sjoerg /* 231625944Sjoerg * Maximum receive unit. Always agreeable, 231725944Sjoerg * but ignored by now. 231825944Sjoerg */ 231925944Sjoerg sp->lcp.their_mru = p[2] * 256 + p[3]; 232025706Sjoerg if (debug) 232169211Sphk log(-1, "%lu ", sp->lcp.their_mru); 232211189Sjkh continue; 232330300Sjoerg 232430300Sjoerg case LCP_OPT_AUTH_PROTO: 232530300Sjoerg authproto = (p[2] << 8) + p[3]; 232630300Sjoerg if (sp->myauth.proto != authproto) { 232730300Sjoerg /* not agreed, nak */ 232830300Sjoerg if (debug) 232969211Sphk log(-1, "[mine %s != his %s] ", 233030300Sjoerg sppp_proto_name(sp->hisauth.proto), 233130300Sjoerg sppp_proto_name(authproto)); 233230300Sjoerg p[2] = sp->myauth.proto >> 8; 233330300Sjoerg p[3] = sp->myauth.proto; 233430300Sjoerg break; 233530300Sjoerg } 233630300Sjoerg if (authproto == PPP_CHAP && p[4] != CHAP_MD5) { 233730300Sjoerg if (debug) 233869211Sphk log(-1, "[chap not MD5] "); 233939981Sjoerg p[4] = CHAP_MD5; 234030300Sjoerg break; 234130300Sjoerg } 234230300Sjoerg continue; 234311189Sjkh } 234425944Sjoerg /* Add the option to nak'ed list. */ 234525706Sjoerg bcopy (p, r, p[1]); 234625706Sjoerg r += p[1]; 234711189Sjkh rlen += p[1]; 234812436Speter } 234925706Sjoerg if (rlen) { 235070199Sjhay /* 235170199Sjhay * Local and remote magics equal -- loopback? 235270199Sjhay */ 235370199Sjhay if (sp->pp_loopcnt >= MAXALIVECNT*5) { 235470199Sjhay if (sp->pp_loopcnt == MAXALIVECNT*5) 235570199Sjhay printf (SPP_FMT "loopback\n", 235670199Sjhay SPP_ARGS(ifp)); 235770199Sjhay if (ifp->if_flags & IFF_UP) { 235870199Sjhay if_down(ifp); 235970199Sjhay sppp_qflush(&sp->pp_cpq); 236070199Sjhay /* XXX ? */ 236170199Sjhay lcp.Down(sp); 236270199Sjhay lcp.Up(sp); 236370199Sjhay } 236470199Sjhay } else if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) { 236528036Sjoerg if (debug) 236669211Sphk log(-1, " max_failure (%d) exceeded, " 236728036Sjoerg "send conf-rej\n", 236828036Sjoerg sp->lcp.max_failure); 236928036Sjoerg sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf); 237028036Sjoerg } else { 237128036Sjoerg if (debug) 237269211Sphk log(-1, " send conf-nak\n"); 237328036Sjoerg sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf); 237428036Sjoerg } 237525944Sjoerg } else { 237625944Sjoerg if (debug) 237769211Sphk log(-1, " send conf-ack\n"); 237828036Sjoerg sp->fail_counter[IDX_LCP] = 0; 237925944Sjoerg sp->pp_loopcnt = 0; 238025944Sjoerg sppp_cp_send (sp, PPP_LCP, CONF_ACK, 238125944Sjoerg h->ident, origlen, h+1); 238225944Sjoerg } 238325944Sjoerg 238411189Sjkh free (buf, M_TEMP); 238511189Sjkh return (rlen == 0); 23864910Swollman} 23874910Swollman 238825944Sjoerg/* 238925944Sjoerg * Analyze the LCP Configure-Reject option list, and adjust our 239025944Sjoerg * negotiation. 239125944Sjoerg */ 239212820Sphkstatic void 239325944Sjoergsppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 23944910Swollman{ 239525944Sjoerg STDDCL; 239625944Sjoerg u_char *buf, *p; 23974910Swollman 239825944Sjoerg len -= 4; 239925944Sjoerg buf = malloc (len, M_TEMP, M_NOWAIT); 240025944Sjoerg if (!buf) 24014910Swollman return; 240225944Sjoerg 240325944Sjoerg if (debug) 240440008Sjoerg log(LOG_DEBUG, SPP_FMT "lcp rej opts: ", 240540008Sjoerg SPP_ARGS(ifp)); 240625944Sjoerg 240725944Sjoerg p = (void*) (h+1); 240825944Sjoerg for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 240925944Sjoerg if (debug) 241069211Sphk log(-1, " %s ", sppp_lcp_opt_name(*p)); 241125944Sjoerg switch (*p) { 241225944Sjoerg case LCP_OPT_MAGIC: 241325944Sjoerg /* Magic number -- can't use it, use 0 */ 241425944Sjoerg sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC); 241525944Sjoerg sp->lcp.magic = 0; 241625944Sjoerg break; 241725944Sjoerg case LCP_OPT_MRU: 241825944Sjoerg /* 241925944Sjoerg * Should not be rejected anyway, since we only 242025944Sjoerg * negotiate a MRU if explicitly requested by 242125944Sjoerg * peer. 242225944Sjoerg */ 242325944Sjoerg sp->lcp.opts &= ~(1 << LCP_OPT_MRU); 242425944Sjoerg break; 242530300Sjoerg case LCP_OPT_AUTH_PROTO: 242630300Sjoerg /* 242730300Sjoerg * Peer doesn't want to authenticate himself, 242830300Sjoerg * deny unless this is a dialout call, and 242930300Sjoerg * AUTHFLAG_NOCALLOUT is set. 243030300Sjoerg */ 243130300Sjoerg if ((sp->pp_flags & PP_CALLIN) == 0 && 243230300Sjoerg (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) { 243330300Sjoerg if (debug) 243469211Sphk log(-1, "[don't insist on auth " 243530300Sjoerg "for callout]"); 243630300Sjoerg sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO); 243730300Sjoerg break; 243830300Sjoerg } 243930300Sjoerg if (debug) 244069211Sphk log(-1, "[access denied]\n"); 244130300Sjoerg lcp.Close(sp); 244230300Sjoerg break; 244325944Sjoerg } 24444910Swollman } 244525944Sjoerg if (debug) 244669211Sphk log(-1, "\n"); 244725944Sjoerg free (buf, M_TEMP); 244825944Sjoerg return; 244925944Sjoerg} 245025944Sjoerg 245125944Sjoerg/* 245225944Sjoerg * Analyze the LCP Configure-NAK option list, and adjust our 245325944Sjoerg * negotiation. 245425944Sjoerg */ 245525944Sjoergstatic void 245625944Sjoergsppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 245725944Sjoerg{ 245825944Sjoerg STDDCL; 245925944Sjoerg u_char *buf, *p; 246025944Sjoerg u_long magic; 246125944Sjoerg 246225944Sjoerg len -= 4; 246325944Sjoerg buf = malloc (len, M_TEMP, M_NOWAIT); 246425944Sjoerg if (!buf) 246525944Sjoerg return; 246625944Sjoerg 246725944Sjoerg if (debug) 246840008Sjoerg log(LOG_DEBUG, SPP_FMT "lcp nak opts: ", 246940008Sjoerg SPP_ARGS(ifp)); 247025944Sjoerg 247125944Sjoerg p = (void*) (h+1); 247225944Sjoerg for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 247325706Sjoerg if (debug) 247469211Sphk log(-1, " %s ", sppp_lcp_opt_name(*p)); 247525944Sjoerg switch (*p) { 247625944Sjoerg case LCP_OPT_MAGIC: 247725944Sjoerg /* Magic number -- renegotiate */ 247825944Sjoerg if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) && 247925944Sjoerg len >= 6 && p[1] == 6) { 248025944Sjoerg magic = (u_long)p[2] << 24 | 248125944Sjoerg (u_long)p[3] << 16 | p[4] << 8 | p[5]; 248225944Sjoerg /* 248325944Sjoerg * If the remote magic is our negated one, 248425944Sjoerg * this looks like a loopback problem. 248525944Sjoerg * Suggest a new magic to make sure. 248625944Sjoerg */ 248725944Sjoerg if (magic == ~sp->lcp.magic) { 248825944Sjoerg if (debug) 248969211Sphk log(-1, "magic glitch "); 249042065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 249135064Sphk sp->lcp.magic = random(); 249240008Sjoerg#else 249340008Sjoerg sp->lcp.magic = time.tv_sec + time.tv_usec; 249440008Sjoerg#endif 249525944Sjoerg } else { 249625944Sjoerg sp->lcp.magic = magic; 249725944Sjoerg if (debug) 249869211Sphk log(-1, "%lu ", magic); 249925944Sjoerg } 250025944Sjoerg } 250125944Sjoerg break; 250225944Sjoerg case LCP_OPT_MRU: 250325944Sjoerg /* 250425944Sjoerg * Peer wants to advise us to negotiate an MRU. 250525944Sjoerg * Agree on it if it's reasonable, or use 250625944Sjoerg * default otherwise. 250725944Sjoerg */ 250825944Sjoerg if (len >= 4 && p[1] == 4) { 250925944Sjoerg u_int mru = p[2] * 256 + p[3]; 251025944Sjoerg if (debug) 251169211Sphk log(-1, "%d ", mru); 251225944Sjoerg if (mru < PP_MTU || mru > PP_MAX_MRU) 251325944Sjoerg mru = PP_MTU; 251425944Sjoerg sp->lcp.mru = mru; 251525944Sjoerg sp->lcp.opts |= (1 << LCP_OPT_MRU); 251625944Sjoerg } 251725944Sjoerg break; 251830300Sjoerg case LCP_OPT_AUTH_PROTO: 251930300Sjoerg /* 252030300Sjoerg * Peer doesn't like our authentication method, 252130300Sjoerg * deny. 252230300Sjoerg */ 252330300Sjoerg if (debug) 252469211Sphk log(-1, "[access denied]\n"); 252530300Sjoerg lcp.Close(sp); 252630300Sjoerg break; 25274910Swollman } 252825944Sjoerg } 252925944Sjoerg if (debug) 253069211Sphk log(-1, "\n"); 253125944Sjoerg free (buf, M_TEMP); 253225944Sjoerg return; 253325944Sjoerg} 253411189Sjkh 253525944Sjoergstatic void 253625944Sjoergsppp_lcp_tlu(struct sppp *sp) 253725944Sjoerg{ 253842066Sphk STDDCL; 253925944Sjoerg int i; 254025944Sjoerg u_long mask; 254125944Sjoerg 254225944Sjoerg /* XXX ? */ 254325944Sjoerg if (! (ifp->if_flags & IFF_UP) && 254425944Sjoerg (ifp->if_flags & IFF_RUNNING)) { 254525944Sjoerg /* Coming out of loopback mode. */ 254625944Sjoerg if_up(ifp); 254740008Sjoerg printf (SPP_FMT "up\n", SPP_ARGS(ifp)); 254825944Sjoerg } 254925944Sjoerg 255025944Sjoerg for (i = 0; i < IDX_COUNT; i++) 255125944Sjoerg if ((cps[i])->flags & CP_QUAL) 255225944Sjoerg (cps[i])->Open(sp); 255325944Sjoerg 255430300Sjoerg if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 || 255530300Sjoerg (sp->pp_flags & PP_NEEDAUTH) != 0) 255625944Sjoerg sp->pp_phase = PHASE_AUTHENTICATE; 255725944Sjoerg else 255825944Sjoerg sp->pp_phase = PHASE_NETWORK; 255925944Sjoerg 256042066Sphk if (debug) 256142066Sphk log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 256242066Sphk sppp_phase_name(sp->pp_phase)); 256325944Sjoerg 256430300Sjoerg /* 256530300Sjoerg * Open all authentication protocols. This is even required 256630300Sjoerg * if we already proceeded to network phase, since it might be 256730300Sjoerg * that remote wants us to authenticate, so we might have to 256830300Sjoerg * send a PAP request. Undesired authentication protocols 256930300Sjoerg * don't do anything when they get an Open event. 257030300Sjoerg */ 257130300Sjoerg for (i = 0; i < IDX_COUNT; i++) 257230300Sjoerg if ((cps[i])->flags & CP_AUTH) 257330300Sjoerg (cps[i])->Open(sp); 257430300Sjoerg 257530300Sjoerg if (sp->pp_phase == PHASE_NETWORK) { 257625944Sjoerg /* Notify all NCPs. */ 257725944Sjoerg for (i = 0; i < IDX_COUNT; i++) 257825944Sjoerg if ((cps[i])->flags & CP_NCP) 257925944Sjoerg (cps[i])->Open(sp); 258025944Sjoerg } 258125944Sjoerg 258225944Sjoerg /* Send Up events to all started protos. */ 258325944Sjoerg for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 258425944Sjoerg if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0) 258525944Sjoerg (cps[i])->Up(sp); 258625944Sjoerg 258742104Sphk /* notify low-level driver of state change */ 258842104Sphk if (sp->pp_chg) 258942104Sphk sp->pp_chg(sp, (int)sp->pp_phase); 259042104Sphk 259125944Sjoerg if (sp->pp_phase == PHASE_NETWORK) 259225944Sjoerg /* if no NCP is starting, close down */ 259330300Sjoerg sppp_lcp_check_and_close(sp); 259425944Sjoerg} 259525944Sjoerg 259625944Sjoergstatic void 259725944Sjoergsppp_lcp_tld(struct sppp *sp) 259825944Sjoerg{ 259942066Sphk STDDCL; 260025944Sjoerg int i; 260125944Sjoerg u_long mask; 260225944Sjoerg 260325944Sjoerg sp->pp_phase = PHASE_TERMINATE; 260425944Sjoerg 260542066Sphk if (debug) 260642066Sphk log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 260742066Sphk sppp_phase_name(sp->pp_phase)); 260825944Sjoerg 260925944Sjoerg /* 261025944Sjoerg * Take upper layers down. We send the Down event first and 261125944Sjoerg * the Close second to prevent the upper layers from sending 261225944Sjoerg * ``a flurry of terminate-request packets'', as the RFC 261325944Sjoerg * describes it. 261425944Sjoerg */ 261525944Sjoerg for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 261625944Sjoerg if (sp->lcp.protos & mask && ((cps[i])->flags & CP_LCP) == 0) { 261725944Sjoerg (cps[i])->Down(sp); 261825944Sjoerg (cps[i])->Close(sp); 261925944Sjoerg } 262025944Sjoerg} 262125944Sjoerg 262225944Sjoergstatic void 262325944Sjoergsppp_lcp_tls(struct sppp *sp) 262425944Sjoerg{ 262542066Sphk STDDCL; 262625944Sjoerg 262725944Sjoerg sp->pp_phase = PHASE_ESTABLISH; 262825944Sjoerg 262942066Sphk if (debug) 263042066Sphk log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 263142066Sphk sppp_phase_name(sp->pp_phase)); 263225944Sjoerg 263325944Sjoerg /* Notify lower layer if desired. */ 263425944Sjoerg if (sp->pp_tls) 263525944Sjoerg (sp->pp_tls)(sp); 263641881Sphk else 263741881Sphk (sp->pp_up)(sp); 263825944Sjoerg} 263925944Sjoerg 264025944Sjoergstatic void 264125944Sjoergsppp_lcp_tlf(struct sppp *sp) 264225944Sjoerg{ 264342066Sphk STDDCL; 264425944Sjoerg 264525944Sjoerg sp->pp_phase = PHASE_DEAD; 264642066Sphk if (debug) 264742066Sphk log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 264842066Sphk sppp_phase_name(sp->pp_phase)); 264925944Sjoerg 265025944Sjoerg /* Notify lower layer if desired. */ 265125944Sjoerg if (sp->pp_tlf) 265225944Sjoerg (sp->pp_tlf)(sp); 265341881Sphk else 265441881Sphk (sp->pp_down)(sp); 265525944Sjoerg} 265625944Sjoerg 265725944Sjoergstatic void 265825944Sjoergsppp_lcp_scr(struct sppp *sp) 265925944Sjoerg{ 266030300Sjoerg char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */]; 266125944Sjoerg int i = 0; 266230300Sjoerg u_short authproto; 266325944Sjoerg 266425944Sjoerg if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) { 266525944Sjoerg if (! sp->lcp.magic) 266642065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 266735064Sphk sp->lcp.magic = random(); 266840008Sjoerg#else 266940008Sjoerg sp->lcp.magic = time.tv_sec + time.tv_usec; 267040008Sjoerg#endif 267125944Sjoerg opt[i++] = LCP_OPT_MAGIC; 267225944Sjoerg opt[i++] = 6; 267325944Sjoerg opt[i++] = sp->lcp.magic >> 24; 267425944Sjoerg opt[i++] = sp->lcp.magic >> 16; 267525944Sjoerg opt[i++] = sp->lcp.magic >> 8; 267625944Sjoerg opt[i++] = sp->lcp.magic; 267725944Sjoerg } 267825944Sjoerg 267925944Sjoerg if (sp->lcp.opts & (1 << LCP_OPT_MRU)) { 268025944Sjoerg opt[i++] = LCP_OPT_MRU; 268125944Sjoerg opt[i++] = 4; 268225944Sjoerg opt[i++] = sp->lcp.mru >> 8; 268325944Sjoerg opt[i++] = sp->lcp.mru; 268425944Sjoerg } 268525944Sjoerg 268630300Sjoerg if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) { 268730300Sjoerg authproto = sp->hisauth.proto; 268830300Sjoerg opt[i++] = LCP_OPT_AUTH_PROTO; 268930300Sjoerg opt[i++] = authproto == PPP_CHAP? 5: 4; 269030300Sjoerg opt[i++] = authproto >> 8; 269130300Sjoerg opt[i++] = authproto; 269230300Sjoerg if (authproto == PPP_CHAP) 269330300Sjoerg opt[i++] = CHAP_MD5; 269430300Sjoerg } 269530300Sjoerg 269678064Sume sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP]; 269725944Sjoerg sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt); 269825944Sjoerg} 269925944Sjoerg 270025944Sjoerg/* 270130300Sjoerg * Check the open NCPs, return true if at least one NCP is open. 270230300Sjoerg */ 270330300Sjoergstatic int 270430300Sjoergsppp_ncp_check(struct sppp *sp) 270530300Sjoerg{ 270630300Sjoerg int i, mask; 270730300Sjoerg 270830300Sjoerg for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 270930300Sjoerg if (sp->lcp.protos & mask && (cps[i])->flags & CP_NCP) 271030300Sjoerg return 1; 271130300Sjoerg return 0; 271230300Sjoerg} 271330300Sjoerg 271430300Sjoerg/* 271525944Sjoerg * Re-check the open NCPs and see if we should terminate the link. 271625944Sjoerg * Called by the NCPs during their tlf action handling. 271725944Sjoerg */ 271825944Sjoergstatic void 271930300Sjoergsppp_lcp_check_and_close(struct sppp *sp) 272025944Sjoerg{ 272125944Sjoerg 272230300Sjoerg if (sp->pp_phase < PHASE_NETWORK) 272330300Sjoerg /* don't bother, we are already going down */ 272430300Sjoerg return; 272530300Sjoerg 272630300Sjoerg if (sppp_ncp_check(sp)) 272730300Sjoerg return; 272830300Sjoerg 272925944Sjoerg lcp.Close(sp); 273025944Sjoerg} 273170199Sjhay 273270199Sjhay/* 273325944Sjoerg *--------------------------------------------------------------------------* 273425944Sjoerg * * 273525944Sjoerg * The IPCP implementation. * 273625944Sjoerg * * 273725944Sjoerg *--------------------------------------------------------------------------* 273825944Sjoerg */ 273925944Sjoerg 274025944Sjoergstatic void 274125944Sjoergsppp_ipcp_init(struct sppp *sp) 274225944Sjoerg{ 274325944Sjoerg sp->ipcp.opts = 0; 274425944Sjoerg sp->ipcp.flags = 0; 274525944Sjoerg sp->state[IDX_IPCP] = STATE_INITIAL; 274625944Sjoerg sp->fail_counter[IDX_IPCP] = 0; 274778064Sume sp->pp_seq[IDX_IPCP] = 0; 274878064Sume sp->pp_rseq[IDX_IPCP] = 0; 274942065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 275029681Sgibbs callout_handle_init(&sp->ch[IDX_IPCP]); 275140008Sjoerg#endif 275225944Sjoerg} 275325944Sjoerg 275425944Sjoergstatic void 275525944Sjoergsppp_ipcp_up(struct sppp *sp) 275625944Sjoerg{ 275725944Sjoerg sppp_up_event(&ipcp, sp); 275825944Sjoerg} 275925944Sjoerg 276025944Sjoergstatic void 276125944Sjoergsppp_ipcp_down(struct sppp *sp) 276225944Sjoerg{ 276325944Sjoerg sppp_down_event(&ipcp, sp); 276425944Sjoerg} 276525944Sjoerg 276625944Sjoergstatic void 276725944Sjoergsppp_ipcp_open(struct sppp *sp) 276825944Sjoerg{ 276925944Sjoerg STDDCL; 277025944Sjoerg u_long myaddr, hisaddr; 277125944Sjoerg 277288534Sjoerg sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN | IPCP_MYADDR_SEEN | 277388534Sjoerg IPCP_MYADDR_DYN | IPCP_VJ); 277442104Sphk 277530300Sjoerg sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0); 277625944Sjoerg /* 277725944Sjoerg * If we don't have his address, this probably means our 277825944Sjoerg * interface doesn't want to talk IP at all. (This could 277925944Sjoerg * be the case if somebody wants to speak only IPX, for 278025944Sjoerg * example.) Don't open IPCP in this case. 278125944Sjoerg */ 278225944Sjoerg if (hisaddr == 0L) { 278325944Sjoerg /* XXX this message should go away */ 278425944Sjoerg if (debug) 278540008Sjoerg log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n", 278640008Sjoerg SPP_ARGS(ifp)); 278725944Sjoerg return; 278825944Sjoerg } 278925944Sjoerg if (myaddr == 0L) { 279025944Sjoerg /* 279125944Sjoerg * I don't have an assigned address, so i need to 279225944Sjoerg * negotiate my address. 279325944Sjoerg */ 279425944Sjoerg sp->ipcp.flags |= IPCP_MYADDR_DYN; 279525944Sjoerg sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 279642104Sphk } else 279742104Sphk sp->ipcp.flags |= IPCP_MYADDR_SEEN; 279888534Sjoerg if (sp->enable_vj) { 279988534Sjoerg sp->ipcp.opts |= (1 << IPCP_OPT_COMPRESSION); 280088534Sjoerg sp->ipcp.max_state = MAX_STATES - 1; 280188534Sjoerg sp->ipcp.compress_cid = 1; 280288534Sjoerg } 280325944Sjoerg sppp_open_event(&ipcp, sp); 280425944Sjoerg} 280525944Sjoerg 280625944Sjoergstatic void 280725944Sjoergsppp_ipcp_close(struct sppp *sp) 280825944Sjoerg{ 280925944Sjoerg sppp_close_event(&ipcp, sp); 281025944Sjoerg if (sp->ipcp.flags & IPCP_MYADDR_DYN) 281125944Sjoerg /* 281225944Sjoerg * My address was dynamic, clear it again. 281325944Sjoerg */ 281425944Sjoerg sppp_set_ip_addr(sp, 0L); 281525944Sjoerg} 281625944Sjoerg 281725944Sjoergstatic void 281825944Sjoergsppp_ipcp_TO(void *cookie) 281925944Sjoerg{ 282025944Sjoerg sppp_to_event(&ipcp, (struct sppp *)cookie); 282125944Sjoerg} 282225944Sjoerg 282325944Sjoerg/* 282425944Sjoerg * Analyze a configure request. Return true if it was agreeable, and 282525944Sjoerg * caused action sca, false if it has been rejected or nak'ed, and 282625944Sjoerg * caused action scn. (The return value is used to make the state 282725944Sjoerg * transition decision in the state automaton.) 282825944Sjoerg */ 282925944Sjoergstatic int 283025944Sjoergsppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len) 283125944Sjoerg{ 283225944Sjoerg u_char *buf, *r, *p; 283325944Sjoerg struct ifnet *ifp = &sp->pp_if; 283425944Sjoerg int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 283525944Sjoerg u_long hisaddr, desiredaddr; 283642104Sphk int gotmyaddr = 0; 283788534Sjoerg int desiredcomp; 283825944Sjoerg 283925944Sjoerg len -= 4; 284025944Sjoerg origlen = len; 284125944Sjoerg /* 284225944Sjoerg * Make sure to allocate a buf that can at least hold a 284325944Sjoerg * conf-nak with an `address' option. We might need it below. 284425944Sjoerg */ 284525944Sjoerg buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 284625944Sjoerg if (! buf) 284725944Sjoerg return (0); 284825944Sjoerg 284925944Sjoerg /* pass 1: see if we can recognize them */ 285025944Sjoerg if (debug) 285140008Sjoerg log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ", 285240008Sjoerg SPP_ARGS(ifp)); 285325944Sjoerg p = (void*) (h+1); 285425944Sjoerg for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 285525944Sjoerg if (debug) 285669211Sphk log(-1, " %s ", sppp_ipcp_opt_name(*p)); 285725944Sjoerg switch (*p) { 285888534Sjoerg case IPCP_OPT_COMPRESSION: 285988534Sjoerg if (!sp->enable_vj) { 286088534Sjoerg /* VJ compression administratively disabled */ 286188534Sjoerg if (debug) 286288534Sjoerg log(-1, "[locally disabled] "); 286388534Sjoerg break; 286488534Sjoerg } 286588534Sjoerg /* 286688534Sjoerg * In theory, we should only conf-rej an 286788534Sjoerg * option that is shorter than RFC 1618 286888534Sjoerg * requires (i.e. < 4), and should conf-nak 286988534Sjoerg * anything else that is not VJ. However, 287088534Sjoerg * since our algorithm always uses the 287188534Sjoerg * original option to NAK it with new values, 287288534Sjoerg * things would become more complicated. In 287388534Sjoerg * pratice, the only commonly implemented IP 287488534Sjoerg * compression option is VJ anyway, so the 287588534Sjoerg * difference is negligible. 287688534Sjoerg */ 287788534Sjoerg if (len >= 6 && p[1] == 6) { 287888534Sjoerg /* 287988534Sjoerg * correctly formed compression option 288088534Sjoerg * that could be VJ compression 288188534Sjoerg */ 288288534Sjoerg continue; 288388534Sjoerg } 288488534Sjoerg if (debug) 288588534Sjoerg log(-1, 288688534Sjoerg "optlen %d [invalid/unsupported] ", 288788534Sjoerg p[1]); 288888534Sjoerg break; 288925944Sjoerg case IPCP_OPT_ADDRESS: 289025944Sjoerg if (len >= 6 && p[1] == 6) { 289125944Sjoerg /* correctly formed address option */ 289225944Sjoerg continue; 289325944Sjoerg } 289425706Sjoerg if (debug) 289569211Sphk log(-1, "[invalid] "); 289611189Sjkh break; 289725944Sjoerg default: 289825944Sjoerg /* Others not supported. */ 289925944Sjoerg if (debug) 290069211Sphk log(-1, "[rej] "); 29014910Swollman break; 29024910Swollman } 290325944Sjoerg /* Add the option to rejected list. */ 290425944Sjoerg bcopy (p, r, p[1]); 290525944Sjoerg r += p[1]; 290625944Sjoerg rlen += p[1]; 290725944Sjoerg } 290825944Sjoerg if (rlen) { 290925944Sjoerg if (debug) 291069211Sphk log(-1, " send conf-rej\n"); 291125944Sjoerg sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf); 291225944Sjoerg return 0; 291325944Sjoerg } else if (debug) 291469211Sphk log(-1, "\n"); 291525944Sjoerg 291625944Sjoerg /* pass 2: parse option values */ 291730300Sjoerg sppp_get_ip_addrs(sp, 0, &hisaddr, 0); 291825944Sjoerg if (debug) 291940008Sjoerg log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ", 292040008Sjoerg SPP_ARGS(ifp)); 292125944Sjoerg p = (void*) (h+1); 292225944Sjoerg len = origlen; 292325944Sjoerg for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 292425944Sjoerg if (debug) 292569211Sphk log(-1, " %s ", sppp_ipcp_opt_name(*p)); 292625944Sjoerg switch (*p) { 292788534Sjoerg case IPCP_OPT_COMPRESSION: 292888534Sjoerg desiredcomp = p[2] << 8 | p[3]; 292988534Sjoerg /* We only support VJ */ 293088534Sjoerg if (desiredcomp == IPCP_COMP_VJ) { 293188534Sjoerg if (debug) 293288534Sjoerg log(-1, "VJ [ack] "); 293388534Sjoerg sp->ipcp.flags |= IPCP_VJ; 293488534Sjoerg sl_compress_init(&sp->pp_comp, p[4]); 293588534Sjoerg sp->ipcp.max_state = p[4]; 293688534Sjoerg sp->ipcp.compress_cid = p[5]; 293788534Sjoerg continue; 293888534Sjoerg } 293988534Sjoerg if (debug) 294088534Sjoerg log(-1, 294188534Sjoerg "compproto %#04x [not supported] ", 294288534Sjoerg desiredcomp); 294388534Sjoerg p[2] = IPCP_COMP_VJ >> 8; 294488534Sjoerg p[3] = IPCP_COMP_VJ; 294588534Sjoerg p[4] = sp->ipcp.max_state; 294688534Sjoerg p[5] = sp->ipcp.compress_cid; 294788534Sjoerg break; 294825944Sjoerg case IPCP_OPT_ADDRESS: 294942104Sphk /* This is the address he wants in his end */ 295025944Sjoerg desiredaddr = p[2] << 24 | p[3] << 16 | 295125944Sjoerg p[4] << 8 | p[5]; 295233928Sphk if (desiredaddr == hisaddr || 295342104Sphk (hisaddr == 1 && desiredaddr != 0)) { 295425944Sjoerg /* 295525944Sjoerg * Peer's address is same as our value, 295670199Sjhay * or we have set it to 0.0.0.1 to 295733928Sphk * indicate that we do not really care, 295825944Sjoerg * this is agreeable. Gonna conf-ack 295925944Sjoerg * it. 296025944Sjoerg */ 296125944Sjoerg if (debug) 296269211Sphk log(-1, "%s [ack] ", 296342104Sphk sppp_dotted_quad(hisaddr)); 296425944Sjoerg /* record that we've seen it already */ 296525944Sjoerg sp->ipcp.flags |= IPCP_HISADDR_SEEN; 296625944Sjoerg continue; 296725944Sjoerg } 296825944Sjoerg /* 296925944Sjoerg * The address wasn't agreeable. This is either 297025944Sjoerg * he sent us 0.0.0.0, asking to assign him an 297125944Sjoerg * address, or he send us another address not 297225944Sjoerg * matching our value. Either case, we gonna 297325944Sjoerg * conf-nak it with our value. 297442104Sphk * XXX: we should "rej" if hisaddr == 0 297525944Sjoerg */ 297625944Sjoerg if (debug) { 297725944Sjoerg if (desiredaddr == 0) 297869211Sphk log(-1, "[addr requested] "); 297925944Sjoerg else 298069211Sphk log(-1, "%s [not agreed] ", 298142104Sphk sppp_dotted_quad(desiredaddr)); 298225944Sjoerg 298325944Sjoerg } 298444235Sphk p[2] = hisaddr >> 24; 298544235Sphk p[3] = hisaddr >> 16; 298644235Sphk p[4] = hisaddr >> 8; 298744235Sphk p[5] = hisaddr; 298811189Sjkh break; 298925706Sjoerg } 299025944Sjoerg /* Add the option to nak'ed list. */ 299125944Sjoerg bcopy (p, r, p[1]); 299225944Sjoerg r += p[1]; 299325944Sjoerg rlen += p[1]; 299425944Sjoerg } 299525944Sjoerg 299625944Sjoerg /* 299725944Sjoerg * If we are about to conf-ack the request, but haven't seen 299825944Sjoerg * his address so far, gonna conf-nak it instead, with the 299925944Sjoerg * `address' option present and our idea of his address being 300025944Sjoerg * filled in there, to request negotiation of both addresses. 300125944Sjoerg * 300225944Sjoerg * XXX This can result in an endless req - nak loop if peer 300325944Sjoerg * doesn't want to send us his address. Q: What should we do 300425944Sjoerg * about it? XXX A: implement the max-failure counter. 300525944Sjoerg */ 300642104Sphk if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) { 300725944Sjoerg buf[0] = IPCP_OPT_ADDRESS; 300825944Sjoerg buf[1] = 6; 300925944Sjoerg buf[2] = hisaddr >> 24; 301025944Sjoerg buf[3] = hisaddr >> 16; 301125944Sjoerg buf[4] = hisaddr >> 8; 301225944Sjoerg buf[5] = hisaddr; 301325944Sjoerg rlen = 6; 301425706Sjoerg if (debug) 301569211Sphk log(-1, "still need hisaddr "); 301625944Sjoerg } 301725944Sjoerg 301825944Sjoerg if (rlen) { 301925706Sjoerg if (debug) 302069211Sphk log(-1, " send conf-nak\n"); 302125944Sjoerg sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf); 302225944Sjoerg } else { 302325706Sjoerg if (debug) 302469211Sphk log(-1, " send conf-ack\n"); 302525944Sjoerg sppp_cp_send (sp, PPP_IPCP, CONF_ACK, 302625944Sjoerg h->ident, origlen, h+1); 302725944Sjoerg } 302825944Sjoerg 302925944Sjoerg free (buf, M_TEMP); 303025944Sjoerg return (rlen == 0); 303125944Sjoerg} 303225944Sjoerg 303325944Sjoerg/* 303425944Sjoerg * Analyze the IPCP Configure-Reject option list, and adjust our 303525944Sjoerg * negotiation. 303625944Sjoerg */ 303725944Sjoergstatic void 303825944Sjoergsppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 303925944Sjoerg{ 304025944Sjoerg u_char *buf, *p; 304125944Sjoerg struct ifnet *ifp = &sp->pp_if; 304225944Sjoerg int debug = ifp->if_flags & IFF_DEBUG; 304325944Sjoerg 304425944Sjoerg len -= 4; 304525944Sjoerg buf = malloc (len, M_TEMP, M_NOWAIT); 304625944Sjoerg if (!buf) 304725944Sjoerg return; 304825944Sjoerg 304925944Sjoerg if (debug) 305040008Sjoerg log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ", 305140008Sjoerg SPP_ARGS(ifp)); 305225944Sjoerg 305325944Sjoerg p = (void*) (h+1); 305425944Sjoerg for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 305525706Sjoerg if (debug) 305669211Sphk log(-1, " %s ", sppp_ipcp_opt_name(*p)); 305725944Sjoerg switch (*p) { 305888534Sjoerg case IPCP_OPT_COMPRESSION: 305988534Sjoerg sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESSION); 306088534Sjoerg break; 306125944Sjoerg case IPCP_OPT_ADDRESS: 306225944Sjoerg /* 306325944Sjoerg * Peer doesn't grok address option. This is 306425944Sjoerg * bad. XXX Should we better give up here? 306542104Sphk * XXX We could try old "addresses" option... 306625944Sjoerg */ 306725944Sjoerg sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS); 306825944Sjoerg break; 306925944Sjoerg } 30704910Swollman } 307125944Sjoerg if (debug) 307269211Sphk log(-1, "\n"); 307325944Sjoerg free (buf, M_TEMP); 307425944Sjoerg return; 30754910Swollman} 30764910Swollman 307725944Sjoerg/* 307825944Sjoerg * Analyze the IPCP Configure-NAK option list, and adjust our 307925944Sjoerg * negotiation. 308025944Sjoerg */ 308112820Sphkstatic void 308225944Sjoergsppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 30834910Swollman{ 308425944Sjoerg u_char *buf, *p; 308525944Sjoerg struct ifnet *ifp = &sp->pp_if; 308625944Sjoerg int debug = ifp->if_flags & IFF_DEBUG; 308788534Sjoerg int desiredcomp; 308825944Sjoerg u_long wantaddr; 30894910Swollman 309025944Sjoerg len -= 4; 309125944Sjoerg buf = malloc (len, M_TEMP, M_NOWAIT); 309225944Sjoerg if (!buf) 309325944Sjoerg return; 309425944Sjoerg 309525944Sjoerg if (debug) 309640008Sjoerg log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ", 309740008Sjoerg SPP_ARGS(ifp)); 309825944Sjoerg 309925944Sjoerg p = (void*) (h+1); 310025944Sjoerg for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 310125944Sjoerg if (debug) 310269211Sphk log(-1, " %s ", sppp_ipcp_opt_name(*p)); 310325944Sjoerg switch (*p) { 310488534Sjoerg case IPCP_OPT_COMPRESSION: 310588534Sjoerg if (len >= 6 && p[1] == 6) { 310688534Sjoerg desiredcomp = p[2] << 8 | p[3]; 310788534Sjoerg if (debug) 310888534Sjoerg log(-1, "[wantcomp %#04x] ", 310988534Sjoerg desiredcomp); 311088534Sjoerg if (desiredcomp == IPCP_COMP_VJ) { 311188534Sjoerg sl_compress_init(&sp->pp_comp, p[4]); 311288534Sjoerg sp->ipcp.max_state = p[4]; 311388534Sjoerg sp->ipcp.compress_cid = p[5]; 311488534Sjoerg if (debug) 311588534Sjoerg log(-1, "[agree] "); 311688534Sjoerg } else 311788534Sjoerg sp->ipcp.opts &= 311888534Sjoerg ~(1 << IPCP_OPT_COMPRESSION); 311988534Sjoerg } 312088534Sjoerg break; 312125944Sjoerg case IPCP_OPT_ADDRESS: 312225944Sjoerg /* 312325944Sjoerg * Peer doesn't like our local IP address. See 312425944Sjoerg * if we can do something for him. We'll drop 312525944Sjoerg * him our address then. 312625944Sjoerg */ 312725944Sjoerg if (len >= 6 && p[1] == 6) { 312825944Sjoerg wantaddr = p[2] << 24 | p[3] << 16 | 312925944Sjoerg p[4] << 8 | p[5]; 313025944Sjoerg sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS); 313125944Sjoerg if (debug) 313269211Sphk log(-1, "[wantaddr %s] ", 313330300Sjoerg sppp_dotted_quad(wantaddr)); 313425944Sjoerg /* 313525944Sjoerg * When doing dynamic address assignment, 313625944Sjoerg * we accept his offer. Otherwise, we 313725944Sjoerg * ignore it and thus continue to negotiate 313825944Sjoerg * our already existing value. 313942104Sphk * XXX: Bogus, if he said no once, he'll 314042104Sphk * just say no again, might as well die. 314125944Sjoerg */ 314225944Sjoerg if (sp->ipcp.flags & IPCP_MYADDR_DYN) { 314325944Sjoerg sppp_set_ip_addr(sp, wantaddr); 314425944Sjoerg if (debug) 314569211Sphk log(-1, "[agree] "); 314642104Sphk sp->ipcp.flags |= IPCP_MYADDR_SEEN; 314725944Sjoerg } 314825944Sjoerg } 314925944Sjoerg break; 315025944Sjoerg } 315125944Sjoerg } 315225944Sjoerg if (debug) 315369211Sphk log(-1, "\n"); 315425944Sjoerg free (buf, M_TEMP); 315525944Sjoerg return; 31564910Swollman} 31574910Swollman 315812820Sphkstatic void 315925944Sjoergsppp_ipcp_tlu(struct sppp *sp) 31604910Swollman{ 316142104Sphk /* we are up - notify isdn daemon */ 316242104Sphk if (sp->pp_con) 316342104Sphk sp->pp_con(sp); 31644910Swollman} 31654910Swollman 316625944Sjoergstatic void 316725944Sjoergsppp_ipcp_tld(struct sppp *sp) 316825944Sjoerg{ 316925944Sjoerg} 317025944Sjoerg 317125944Sjoergstatic void 317225944Sjoergsppp_ipcp_tls(struct sppp *sp) 317325944Sjoerg{ 317425944Sjoerg /* indicate to LCP that it must stay alive */ 317525944Sjoerg sp->lcp.protos |= (1 << IDX_IPCP); 317625944Sjoerg} 317725944Sjoerg 317825944Sjoergstatic void 317925944Sjoergsppp_ipcp_tlf(struct sppp *sp) 318025944Sjoerg{ 318125944Sjoerg /* we no longer need LCP */ 318225944Sjoerg sp->lcp.protos &= ~(1 << IDX_IPCP); 318330300Sjoerg sppp_lcp_check_and_close(sp); 318425944Sjoerg} 318525944Sjoerg 318625944Sjoergstatic void 318725944Sjoergsppp_ipcp_scr(struct sppp *sp) 318825944Sjoerg{ 318925944Sjoerg char opt[6 /* compression */ + 6 /* address */]; 319025944Sjoerg u_long ouraddr; 319125944Sjoerg int i = 0; 319225944Sjoerg 319388534Sjoerg if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) { 319488534Sjoerg opt[i++] = IPCP_OPT_COMPRESSION; 319588534Sjoerg opt[i++] = 6; 319688534Sjoerg opt[i++] = IPCP_COMP_VJ >> 8; 319788534Sjoerg opt[i++] = IPCP_COMP_VJ; 319888534Sjoerg opt[i++] = sp->ipcp.max_state; 319988534Sjoerg opt[i++] = sp->ipcp.compress_cid; 320088534Sjoerg } 320125944Sjoerg if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) { 320230300Sjoerg sppp_get_ip_addrs(sp, &ouraddr, 0, 0); 320325944Sjoerg opt[i++] = IPCP_OPT_ADDRESS; 320425944Sjoerg opt[i++] = 6; 320525944Sjoerg opt[i++] = ouraddr >> 24; 320625944Sjoerg opt[i++] = ouraddr >> 16; 320725944Sjoerg opt[i++] = ouraddr >> 8; 320825944Sjoerg opt[i++] = ouraddr; 320925944Sjoerg } 321025944Sjoerg 321178064Sume sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP]; 321225944Sjoerg sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt); 321325944Sjoerg} 321425944Sjoerg 321570199Sjhay/* 321630300Sjoerg *--------------------------------------------------------------------------* 321730300Sjoerg * * 321878064Sume * The IPv6CP implementation. * 321978064Sume * * 322078064Sume *--------------------------------------------------------------------------* 322178064Sume */ 322278064Sume 322378064Sume#ifdef INET6 322478064Sumestatic void 322578064Sumesppp_ipv6cp_init(struct sppp *sp) 322678064Sume{ 322778064Sume sp->ipv6cp.opts = 0; 322878064Sume sp->ipv6cp.flags = 0; 322978064Sume sp->state[IDX_IPV6CP] = STATE_INITIAL; 323078064Sume sp->fail_counter[IDX_IPV6CP] = 0; 323178064Sume sp->pp_seq[IDX_IPV6CP] = 0; 323278064Sume sp->pp_rseq[IDX_IPV6CP] = 0; 323378064Sume#if defined(__NetBSD__) 323478064Sume callout_init(&sp->ch[IDX_IPV6CP]); 323578064Sume#endif 323678064Sume#if defined(__FreeBSD__) && __FreeBSD__ >= 3 323778064Sume callout_handle_init(&sp->ch[IDX_IPV6CP]); 323878064Sume#endif 323978064Sume} 324078064Sume 324178064Sumestatic void 324278064Sumesppp_ipv6cp_up(struct sppp *sp) 324378064Sume{ 324478064Sume sppp_up_event(&ipv6cp, sp); 324578064Sume} 324678064Sume 324778064Sumestatic void 324878064Sumesppp_ipv6cp_down(struct sppp *sp) 324978064Sume{ 325078064Sume sppp_down_event(&ipv6cp, sp); 325178064Sume} 325278064Sume 325378064Sumestatic void 325478064Sumesppp_ipv6cp_open(struct sppp *sp) 325578064Sume{ 325678064Sume STDDCL; 325778064Sume struct in6_addr myaddr, hisaddr; 325878064Sume 325978064Sume#ifdef IPV6CP_MYIFID_DYN 326078064Sume sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN); 326178064Sume#else 326278064Sume sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN; 326378064Sume#endif 326478064Sume 326578064Sume sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0); 326678064Sume /* 326778064Sume * If we don't have our address, this probably means our 326878064Sume * interface doesn't want to talk IPv6 at all. (This could 326978064Sume * be the case if somebody wants to speak only IPX, for 327078064Sume * example.) Don't open IPv6CP in this case. 327178064Sume */ 327278064Sume if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) { 327378064Sume /* XXX this message should go away */ 327478064Sume if (debug) 327578064Sume log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n", 327678064Sume SPP_ARGS(ifp)); 327778064Sume return; 327878064Sume } 327978064Sume 328078064Sume sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 328178064Sume sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 328278064Sume sppp_open_event(&ipv6cp, sp); 328378064Sume} 328478064Sume 328578064Sumestatic void 328678064Sumesppp_ipv6cp_close(struct sppp *sp) 328778064Sume{ 328878064Sume sppp_close_event(&ipv6cp, sp); 328978064Sume} 329078064Sume 329178064Sumestatic void 329278064Sumesppp_ipv6cp_TO(void *cookie) 329378064Sume{ 329478064Sume sppp_to_event(&ipv6cp, (struct sppp *)cookie); 329578064Sume} 329678064Sume 329778064Sume/* 329878064Sume * Analyze a configure request. Return true if it was agreeable, and 329978064Sume * caused action sca, false if it has been rejected or nak'ed, and 330078064Sume * caused action scn. (The return value is used to make the state 330178064Sume * transition decision in the state automaton.) 330278064Sume */ 330378064Sumestatic int 330478064Sumesppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 330578064Sume{ 330678064Sume u_char *buf, *r, *p; 330778064Sume struct ifnet *ifp = &sp->pp_if; 330878064Sume int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG; 330978064Sume struct in6_addr myaddr, desiredaddr, suggestaddr; 331078064Sume int ifidcount; 331178064Sume int type; 331278064Sume int collision, nohisaddr; 331378064Sume 331478064Sume len -= 4; 331578064Sume origlen = len; 331678064Sume /* 331778064Sume * Make sure to allocate a buf that can at least hold a 331878064Sume * conf-nak with an `address' option. We might need it below. 331978064Sume */ 332078064Sume buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT); 332178064Sume if (! buf) 332278064Sume return (0); 332378064Sume 332478064Sume /* pass 1: see if we can recognize them */ 332578064Sume if (debug) 332678064Sume log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:", 332778064Sume SPP_ARGS(ifp)); 332878064Sume p = (void*) (h+1); 332978064Sume ifidcount = 0; 333078064Sume for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 333178064Sume if (debug) 333278176Sume log(-1, " %s", sppp_ipv6cp_opt_name(*p)); 333378064Sume switch (*p) { 333478064Sume case IPV6CP_OPT_IFID: 333578064Sume if (len >= 10 && p[1] == 10 && ifidcount == 0) { 333678064Sume /* correctly formed address option */ 333778064Sume ifidcount++; 333878064Sume continue; 333978064Sume } 334078064Sume if (debug) 334178176Sume log(-1, " [invalid]"); 334278064Sume break; 334378064Sume#ifdef notyet 334478064Sume case IPV6CP_OPT_COMPRESSION: 334578064Sume if (len >= 4 && p[1] >= 4) { 334678064Sume /* correctly formed compress option */ 334778064Sume continue; 334878064Sume } 334978064Sume if (debug) 335078176Sume log(-1, " [invalid]"); 335178064Sume break; 335278064Sume#endif 335378064Sume default: 335478064Sume /* Others not supported. */ 335578064Sume if (debug) 335678176Sume log(-1, " [rej]"); 335778064Sume break; 335878064Sume } 335978064Sume /* Add the option to rejected list. */ 336078064Sume bcopy (p, r, p[1]); 336178064Sume r += p[1]; 336278064Sume rlen += p[1]; 336378064Sume } 336478064Sume if (rlen) { 336578064Sume if (debug) 336678176Sume log(-1, " send conf-rej\n"); 336778064Sume sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf); 336878064Sume goto end; 336978064Sume } else if (debug) 337078176Sume log(-1, "\n"); 337178064Sume 337278064Sume /* pass 2: parse option values */ 337378064Sume sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 337478064Sume if (debug) 337578064Sume log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ", 337678064Sume SPP_ARGS(ifp)); 337778064Sume p = (void*) (h+1); 337878064Sume len = origlen; 337978064Sume type = CONF_ACK; 338078064Sume for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) { 338178064Sume if (debug) 338278176Sume log(-1, " %s", sppp_ipv6cp_opt_name(*p)); 338378064Sume switch (*p) { 338478064Sume#ifdef notyet 338578064Sume case IPV6CP_OPT_COMPRESSION: 338678064Sume continue; 338778064Sume#endif 338878064Sume case IPV6CP_OPT_IFID: 338978064Sume bzero(&desiredaddr, sizeof(desiredaddr)); 339078064Sume bcopy(&p[2], &desiredaddr.s6_addr[8], 8); 339178064Sume collision = (bcmp(&desiredaddr.s6_addr[8], 339278064Sume &myaddr.s6_addr[8], 8) == 0); 339378064Sume nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr); 339478064Sume 339578064Sume desiredaddr.s6_addr16[0] = htons(0xfe80); 339678064Sume desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 339778064Sume 339878064Sume if (!collision && !nohisaddr) { 339978064Sume /* no collision, hisaddr known - Conf-Ack */ 340078064Sume type = CONF_ACK; 340178064Sume 340278064Sume if (debug) { 340378176Sume log(-1, " %s [%s]", 340478064Sume ip6_sprintf(&desiredaddr), 340578064Sume sppp_cp_type_name(type)); 340678064Sume } 340778064Sume continue; 340878064Sume } 340978064Sume 341078064Sume bzero(&suggestaddr, sizeof(&suggestaddr)); 341178064Sume if (collision && nohisaddr) { 341278064Sume /* collision, hisaddr unknown - Conf-Rej */ 341378064Sume type = CONF_REJ; 341478064Sume bzero(&p[2], 8); 341578064Sume } else { 341678064Sume /* 341778064Sume * - no collision, hisaddr unknown, or 341878064Sume * - collision, hisaddr known 341978064Sume * Conf-Nak, suggest hisaddr 342078064Sume */ 342178064Sume type = CONF_NAK; 342278064Sume sppp_suggest_ip6_addr(sp, &suggestaddr); 342378064Sume bcopy(&suggestaddr.s6_addr[8], &p[2], 8); 342478064Sume } 342578064Sume if (debug) 342678176Sume log(-1, " %s [%s]", ip6_sprintf(&desiredaddr), 342778064Sume sppp_cp_type_name(type)); 342878064Sume break; 342978064Sume } 343078064Sume /* Add the option to nak'ed list. */ 343178064Sume bcopy (p, r, p[1]); 343278064Sume r += p[1]; 343378064Sume rlen += p[1]; 343478064Sume } 343578064Sume 343678064Sume if (rlen == 0 && type == CONF_ACK) { 343778064Sume if (debug) 343878176Sume log(-1, " send %s\n", sppp_cp_type_name(type)); 343978064Sume sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1); 344078064Sume } else { 344178064Sume#ifdef DIAGNOSTIC 344278064Sume if (type == CONF_ACK) 344378064Sume panic("IPv6CP RCR: CONF_ACK with non-zero rlen"); 344478064Sume#endif 344578064Sume 344678064Sume if (debug) { 344778176Sume log(-1, " send %s suggest %s\n", 344878064Sume sppp_cp_type_name(type), ip6_sprintf(&suggestaddr)); 344978064Sume } 345078064Sume sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf); 345178064Sume } 345278064Sume 345378064Sume end: 345478064Sume free (buf, M_TEMP); 345578064Sume return (rlen == 0); 345678064Sume} 345778064Sume 345878064Sume/* 345978064Sume * Analyze the IPv6CP Configure-Reject option list, and adjust our 346078064Sume * negotiation. 346178064Sume */ 346278064Sumestatic void 346378064Sumesppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 346478064Sume{ 346578064Sume u_char *buf, *p; 346678064Sume struct ifnet *ifp = &sp->pp_if; 346778064Sume int debug = ifp->if_flags & IFF_DEBUG; 346878064Sume 346978064Sume len -= 4; 347078064Sume buf = malloc (len, M_TEMP, M_NOWAIT); 347178064Sume if (!buf) 347278064Sume return; 347378064Sume 347478064Sume if (debug) 347578064Sume log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:", 347678064Sume SPP_ARGS(ifp)); 347778064Sume 347878064Sume p = (void*) (h+1); 347978064Sume for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 348078064Sume if (debug) 348178176Sume log(-1, " %s", sppp_ipv6cp_opt_name(*p)); 348278064Sume switch (*p) { 348378064Sume case IPV6CP_OPT_IFID: 348478064Sume /* 348578064Sume * Peer doesn't grok address option. This is 348678064Sume * bad. XXX Should we better give up here? 348778064Sume */ 348878064Sume sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID); 348978064Sume break; 349078064Sume#ifdef notyet 349178064Sume case IPV6CP_OPT_COMPRESS: 349278064Sume sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS); 349378064Sume break; 349478064Sume#endif 349578064Sume } 349678064Sume } 349778064Sume if (debug) 349878176Sume log(-1, "\n"); 349978064Sume free (buf, M_TEMP); 350078064Sume return; 350178064Sume} 350278064Sume 350378064Sume/* 350478064Sume * Analyze the IPv6CP Configure-NAK option list, and adjust our 350578064Sume * negotiation. 350678064Sume */ 350778064Sumestatic void 350878064Sumesppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 350978064Sume{ 351078064Sume u_char *buf, *p; 351178064Sume struct ifnet *ifp = &sp->pp_if; 351278064Sume int debug = ifp->if_flags & IFF_DEBUG; 351378064Sume struct in6_addr suggestaddr; 351478064Sume 351578064Sume len -= 4; 351678064Sume buf = malloc (len, M_TEMP, M_NOWAIT); 351778064Sume if (!buf) 351878064Sume return; 351978064Sume 352078064Sume if (debug) 352178064Sume log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:", 352278064Sume SPP_ARGS(ifp)); 352378064Sume 352478064Sume p = (void*) (h+1); 352578064Sume for (; len > 1 && p[1]; len -= p[1], p += p[1]) { 352678064Sume if (debug) 352778176Sume log(-1, " %s", sppp_ipv6cp_opt_name(*p)); 352878064Sume switch (*p) { 352978064Sume case IPV6CP_OPT_IFID: 353078064Sume /* 353178064Sume * Peer doesn't like our local ifid. See 353278064Sume * if we can do something for him. We'll drop 353378064Sume * him our address then. 353478064Sume */ 353578064Sume if (len < 10 || p[1] != 10) 353678064Sume break; 353778064Sume bzero(&suggestaddr, sizeof(suggestaddr)); 353878064Sume suggestaddr.s6_addr16[0] = htons(0xfe80); 353978064Sume suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index); 354078064Sume bcopy(&p[2], &suggestaddr.s6_addr[8], 8); 354178064Sume 354278064Sume sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID); 354378064Sume if (debug) 354478176Sume log(-1, " [suggestaddr %s]", 354578064Sume ip6_sprintf(&suggestaddr)); 354678064Sume#ifdef IPV6CP_MYIFID_DYN 354778064Sume /* 354878064Sume * When doing dynamic address assignment, 354978064Sume * we accept his offer. 355078064Sume */ 355178064Sume if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) { 355278064Sume struct in6_addr lastsuggest; 355378064Sume /* 355478064Sume * If <suggested myaddr from peer> equals to 355578064Sume * <hisaddr we have suggested last time>, 355678064Sume * we have a collision. generate new random 355778064Sume * ifid. 355878064Sume */ 355978064Sume sppp_suggest_ip6_addr(&lastsuggest); 356078064Sume if (IN6_ARE_ADDR_EQUAL(&suggestaddr, 356178064Sume lastsuggest)) { 356278064Sume if (debug) 356378176Sume log(-1, " [random]"); 356478064Sume sppp_gen_ip6_addr(sp, &suggestaddr); 356578064Sume } 356678064Sume sppp_set_ip6_addr(sp, &suggestaddr, 0); 356778064Sume if (debug) 356878176Sume log(-1, " [agree]"); 356978064Sume sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN; 357078064Sume } 357178064Sume#else 357278064Sume /* 357378064Sume * Since we do not do dynamic address assignment, 357478064Sume * we ignore it and thus continue to negotiate 357578064Sume * our already existing value. This can possibly 357678064Sume * go into infinite request-reject loop. 357778064Sume * 357878064Sume * This is not likely because we normally use 357978064Sume * ifid based on MAC-address. 358078064Sume * If you have no ethernet card on the node, too bad. 358178064Sume * XXX should we use fail_counter? 358278064Sume */ 358378064Sume#endif 358478064Sume break; 358578064Sume#ifdef notyet 358678064Sume case IPV6CP_OPT_COMPRESS: 358778064Sume /* 358878064Sume * Peer wants different compression parameters. 358978064Sume */ 359078064Sume break; 359178064Sume#endif 359278064Sume } 359378064Sume } 359478064Sume if (debug) 359578176Sume log(-1, "\n"); 359678064Sume free (buf, M_TEMP); 359778064Sume return; 359878064Sume} 359978064Sumestatic void 360078064Sumesppp_ipv6cp_tlu(struct sppp *sp) 360178064Sume{ 360278064Sume /* we are up - notify isdn daemon */ 360378064Sume if (sp->pp_con) 360478064Sume sp->pp_con(sp); 360578064Sume} 360678064Sume 360778064Sumestatic void 360878064Sumesppp_ipv6cp_tld(struct sppp *sp) 360978064Sume{ 361078064Sume} 361178064Sume 361278064Sumestatic void 361378064Sumesppp_ipv6cp_tls(struct sppp *sp) 361478064Sume{ 361578064Sume /* indicate to LCP that it must stay alive */ 361678064Sume sp->lcp.protos |= (1 << IDX_IPV6CP); 361778064Sume} 361878064Sume 361978064Sumestatic void 362078064Sumesppp_ipv6cp_tlf(struct sppp *sp) 362178064Sume{ 362278064Sume 362378064Sume#if 0 /* need #if 0 to close IPv6CP properly */ 362478064Sume /* we no longer need LCP */ 362578064Sume sp->lcp.protos &= ~(1 << IDX_IPV6CP); 362678064Sume sppp_lcp_check_and_close(sp); 362778064Sume#endif 362878064Sume} 362978064Sume 363078064Sumestatic void 363178064Sumesppp_ipv6cp_scr(struct sppp *sp) 363278064Sume{ 363378064Sume char opt[10 /* ifid */ + 4 /* compression, minimum */]; 363478064Sume struct in6_addr ouraddr; 363578064Sume int i = 0; 363678064Sume 363778064Sume if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) { 363878064Sume sppp_get_ip6_addrs(sp, &ouraddr, 0, 0); 363978064Sume opt[i++] = IPV6CP_OPT_IFID; 364078064Sume opt[i++] = 10; 364178064Sume bcopy(&ouraddr.s6_addr[8], &opt[i], 8); 364278064Sume i += 8; 364378064Sume } 364478064Sume 364578064Sume#ifdef notyet 364678064Sume if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) { 364778064Sume opt[i++] = IPV6CP_OPT_COMPRESSION; 364878064Sume opt[i++] = 4; 364978064Sume opt[i++] = 0; /* TBD */ 365078064Sume opt[i++] = 0; /* TBD */ 365178064Sume /* variable length data may follow */ 365278064Sume } 365378064Sume#endif 365478064Sume 365578064Sume sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP]; 365678064Sume sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt); 365778064Sume} 365878064Sume#else /*INET6*/ 365978064Sumestatic void sppp_ipv6cp_init(struct sppp *sp) 366078064Sume{ 366178064Sume} 366278064Sume 366378064Sumestatic void sppp_ipv6cp_up(struct sppp *sp) 366478064Sume{ 366578064Sume} 366678064Sume 366778064Sumestatic void sppp_ipv6cp_down(struct sppp *sp) 366878064Sume{ 366978064Sume} 367078064Sume 367178064Sume 367278064Sumestatic void sppp_ipv6cp_open(struct sppp *sp) 367378064Sume{ 367478064Sume} 367578064Sume 367678064Sumestatic void sppp_ipv6cp_close(struct sppp *sp) 367778064Sume{ 367878064Sume} 367978064Sume 368078064Sumestatic void sppp_ipv6cp_TO(void *sp) 368178064Sume{ 368278064Sume} 368378064Sume 368478064Sumestatic int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len) 368578064Sume{ 368678064Sume return 0; 368778064Sume} 368878064Sume 368978064Sumestatic void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len) 369078064Sume{ 369178064Sume} 369278064Sume 369378064Sumestatic void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len) 369478064Sume{ 369578064Sume} 369678064Sume 369778064Sumestatic void sppp_ipv6cp_tlu(struct sppp *sp) 369878064Sume{ 369978064Sume} 370078064Sume 370178064Sumestatic void sppp_ipv6cp_tld(struct sppp *sp) 370278064Sume{ 370378064Sume} 370478064Sume 370578064Sumestatic void sppp_ipv6cp_tls(struct sppp *sp) 370678064Sume{ 370778064Sume} 370878064Sume 370978064Sumestatic void sppp_ipv6cp_tlf(struct sppp *sp) 371078064Sume{ 371178064Sume} 371278064Sume 371378064Sumestatic void sppp_ipv6cp_scr(struct sppp *sp) 371478064Sume{ 371578064Sume} 371678064Sume#endif /*INET6*/ 371778064Sume 371878064Sume/* 371978064Sume *--------------------------------------------------------------------------* 372078064Sume * * 372130300Sjoerg * The CHAP implementation. * 372230300Sjoerg * * 372330300Sjoerg *--------------------------------------------------------------------------* 372430300Sjoerg */ 372530300Sjoerg 372630300Sjoerg/* 372730300Sjoerg * The authentication protocols don't employ a full-fledged state machine as 372830300Sjoerg * the control protocols do, since they do have Open and Close events, but 372930300Sjoerg * not Up and Down, nor are they explicitly terminated. Also, use of the 373030300Sjoerg * authentication protocols may be different in both directions (this makes 373130300Sjoerg * sense, think of a machine that never accepts incoming calls but only 373230300Sjoerg * calls out, it doesn't require the called party to authenticate itself). 373330300Sjoerg * 373430300Sjoerg * Our state machine for the local authentication protocol (we are requesting 373530300Sjoerg * the peer to authenticate) looks like: 373630300Sjoerg * 373730300Sjoerg * RCA- 373830300Sjoerg * +--------------------------------------------+ 373930300Sjoerg * V scn,tld| 374030300Sjoerg * +--------+ Close +---------+ RCA+ 374130300Sjoerg * | |<----------------------------------| |------+ 374230300Sjoerg * +--->| Closed | TO* | Opened | sca | 374330300Sjoerg * | | |-----+ +-------| |<-----+ 374430300Sjoerg * | +--------+ irc | | +---------+ 374530300Sjoerg * | ^ | | ^ 374630300Sjoerg * | | | | | 374730300Sjoerg * | | | | | 374830300Sjoerg * | TO-| | | | 374930300Sjoerg * | |tld TO+ V | | 375030300Sjoerg * | | +------->+ | | 375130300Sjoerg * | | | | | | 375230300Sjoerg * | +--------+ V | | 375330300Sjoerg * | | |<----+<--------------------+ | 375430300Sjoerg * | | Req- | scr | 375530300Sjoerg * | | Sent | | 375630300Sjoerg * | | | | 375730300Sjoerg * | +--------+ | 375830300Sjoerg * | RCA- | | RCA+ | 375930300Sjoerg * +------+ +------------------------------------------+ 376030300Sjoerg * scn,tld sca,irc,ict,tlu 376130300Sjoerg * 376230300Sjoerg * 376330300Sjoerg * with: 376430300Sjoerg * 376530300Sjoerg * Open: LCP reached authentication phase 376630300Sjoerg * Close: LCP reached terminate phase 376730300Sjoerg * 376830300Sjoerg * RCA+: received reply (pap-req, chap-response), acceptable 376930300Sjoerg * RCN: received reply (pap-req, chap-response), not acceptable 377030300Sjoerg * TO+: timeout with restart counter >= 0 377130300Sjoerg * TO-: timeout with restart counter < 0 377230300Sjoerg * TO*: reschedule timeout for CHAP 377330300Sjoerg * 377430300Sjoerg * scr: send request packet (none for PAP, chap-challenge) 377530300Sjoerg * sca: send ack packet (pap-ack, chap-success) 377630300Sjoerg * scn: send nak packet (pap-nak, chap-failure) 377730300Sjoerg * ict: initialize re-challenge timer (CHAP only) 377830300Sjoerg * 377930300Sjoerg * tlu: this-layer-up, LCP reaches network phase 378030300Sjoerg * tld: this-layer-down, LCP enters terminate phase 378130300Sjoerg * 378230300Sjoerg * Note that in CHAP mode, after sending a new challenge, while the state 378330300Sjoerg * automaton falls back into Req-Sent state, it doesn't signal a tld 378430300Sjoerg * event to LCP, so LCP remains in network phase. Only after not getting 378530300Sjoerg * any response (or after getting an unacceptable response), CHAP closes, 378630300Sjoerg * causing LCP to enter terminate phase. 378730300Sjoerg * 378830300Sjoerg * With PAP, there is no initial request that can be sent. The peer is 378930300Sjoerg * expected to send one based on the successful negotiation of PAP as 379030300Sjoerg * the authentication protocol during the LCP option negotiation. 379130300Sjoerg * 379230300Sjoerg * Incoming authentication protocol requests (remote requests 379330300Sjoerg * authentication, we are peer) don't employ a state machine at all, 379430300Sjoerg * they are simply answered. Some peers [Ascend P50 firmware rev 379530300Sjoerg * 4.50] react allergically when sending IPCP requests while they are 379630300Sjoerg * still in authentication phase (thereby violating the standard that 379730300Sjoerg * demands that these NCP packets are to be discarded), so we keep 379830300Sjoerg * track of the peer demanding us to authenticate, and only proceed to 379930300Sjoerg * phase network once we've seen a positive acknowledge for the 380030300Sjoerg * authentication. 380130300Sjoerg */ 380230300Sjoerg 380330300Sjoerg/* 380430300Sjoerg * Handle incoming CHAP packets. 380530300Sjoerg */ 380630300Sjoergvoid 380730300Sjoergsppp_chap_input(struct sppp *sp, struct mbuf *m) 380830300Sjoerg{ 380930300Sjoerg STDDCL; 381030300Sjoerg struct lcp_header *h; 381130300Sjoerg int len, x; 381230300Sjoerg u_char *value, *name, digest[AUTHKEYLEN], dsize; 381330300Sjoerg int value_len, name_len; 381430300Sjoerg MD5_CTX ctx; 381530300Sjoerg 381630300Sjoerg len = m->m_pkthdr.len; 381730300Sjoerg if (len < 4) { 381830300Sjoerg if (debug) 381930300Sjoerg log(LOG_DEBUG, 382040008Sjoerg SPP_FMT "chap invalid packet length: %d bytes\n", 382140008Sjoerg SPP_ARGS(ifp), len); 382230300Sjoerg return; 382330300Sjoerg } 382430300Sjoerg h = mtod (m, struct lcp_header*); 382530300Sjoerg if (len > ntohs (h->len)) 382630300Sjoerg len = ntohs (h->len); 382730300Sjoerg 382830300Sjoerg switch (h->type) { 382930300Sjoerg /* challenge, failure and success are his authproto */ 383030300Sjoerg case CHAP_CHALLENGE: 383130300Sjoerg value = 1 + (u_char*)(h+1); 383230300Sjoerg value_len = value[-1]; 383330300Sjoerg name = value + value_len; 383430300Sjoerg name_len = len - value_len - 5; 383530300Sjoerg if (name_len < 0) { 383630300Sjoerg if (debug) { 383730300Sjoerg log(LOG_DEBUG, 383840008Sjoerg SPP_FMT "chap corrupted challenge " 383930300Sjoerg "<%s id=0x%x len=%d", 384040008Sjoerg SPP_ARGS(ifp), 384130300Sjoerg sppp_auth_type_name(PPP_CHAP, h->type), 384230300Sjoerg h->ident, ntohs(h->len)); 384344145Sphk sppp_print_bytes((u_char*) (h+1), len-4); 384469211Sphk log(-1, ">\n"); 384530300Sjoerg } 384630300Sjoerg break; 384730300Sjoerg } 384870199Sjhay 384930300Sjoerg if (debug) { 385030300Sjoerg log(LOG_DEBUG, 385140008Sjoerg SPP_FMT "chap input <%s id=0x%x len=%d name=", 385240008Sjoerg SPP_ARGS(ifp), 385330300Sjoerg sppp_auth_type_name(PPP_CHAP, h->type), h->ident, 385430300Sjoerg ntohs(h->len)); 385530300Sjoerg sppp_print_string((char*) name, name_len); 385669211Sphk log(-1, " value-size=%d value=", value_len); 385730300Sjoerg sppp_print_bytes(value, value_len); 385869211Sphk log(-1, ">\n"); 385930300Sjoerg } 386030300Sjoerg 386130300Sjoerg /* Compute reply value. */ 386230300Sjoerg MD5Init(&ctx); 386330300Sjoerg MD5Update(&ctx, &h->ident, 1); 386430300Sjoerg MD5Update(&ctx, sp->myauth.secret, 386530300Sjoerg sppp_strnlen(sp->myauth.secret, AUTHKEYLEN)); 386630300Sjoerg MD5Update(&ctx, value, value_len); 386730300Sjoerg MD5Final(digest, &ctx); 386830300Sjoerg dsize = sizeof digest; 386930300Sjoerg 387030300Sjoerg sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident, 387130300Sjoerg sizeof dsize, (const char *)&dsize, 387230300Sjoerg sizeof digest, digest, 387340008Sjoerg (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN), 387430300Sjoerg sp->myauth.name, 387530300Sjoerg 0); 387630300Sjoerg break; 387730300Sjoerg 387830300Sjoerg case CHAP_SUCCESS: 387930300Sjoerg if (debug) { 388040008Sjoerg log(LOG_DEBUG, SPP_FMT "chap success", 388140008Sjoerg SPP_ARGS(ifp)); 388230300Sjoerg if (len > 4) { 388369211Sphk log(-1, ": "); 388430300Sjoerg sppp_print_string((char*)(h + 1), len - 4); 388530300Sjoerg } 388669211Sphk log(-1, "\n"); 388730300Sjoerg } 388830300Sjoerg x = splimp(); 388930300Sjoerg sp->pp_flags &= ~PP_NEEDAUTH; 389030300Sjoerg if (sp->myauth.proto == PPP_CHAP && 389132169Sgj (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 389230300Sjoerg (sp->lcp.protos & (1 << IDX_CHAP)) == 0) { 389330300Sjoerg /* 389430300Sjoerg * We are authenticator for CHAP but didn't 389530300Sjoerg * complete yet. Leave it to tlu to proceed 389630300Sjoerg * to network phase. 389730300Sjoerg */ 389830300Sjoerg splx(x); 389930300Sjoerg break; 390030300Sjoerg } 390130300Sjoerg splx(x); 390230300Sjoerg sppp_phase_network(sp); 390330300Sjoerg break; 390430300Sjoerg 390530300Sjoerg case CHAP_FAILURE: 390630300Sjoerg if (debug) { 390740008Sjoerg log(LOG_INFO, SPP_FMT "chap failure", 390840008Sjoerg SPP_ARGS(ifp)); 390930300Sjoerg if (len > 4) { 391069211Sphk log(-1, ": "); 391130300Sjoerg sppp_print_string((char*)(h + 1), len - 4); 391230300Sjoerg } 391369211Sphk log(-1, "\n"); 391430300Sjoerg } else 391540008Sjoerg log(LOG_INFO, SPP_FMT "chap failure\n", 391640008Sjoerg SPP_ARGS(ifp)); 391730300Sjoerg /* await LCP shutdown by authenticator */ 391830300Sjoerg break; 391930300Sjoerg 392030300Sjoerg /* response is my authproto */ 392130300Sjoerg case CHAP_RESPONSE: 392230300Sjoerg value = 1 + (u_char*)(h+1); 392330300Sjoerg value_len = value[-1]; 392430300Sjoerg name = value + value_len; 392530300Sjoerg name_len = len - value_len - 5; 392630300Sjoerg if (name_len < 0) { 392730300Sjoerg if (debug) { 392830300Sjoerg log(LOG_DEBUG, 392940008Sjoerg SPP_FMT "chap corrupted response " 393030300Sjoerg "<%s id=0x%x len=%d", 393140008Sjoerg SPP_ARGS(ifp), 393230300Sjoerg sppp_auth_type_name(PPP_CHAP, h->type), 393330300Sjoerg h->ident, ntohs(h->len)); 393444145Sphk sppp_print_bytes((u_char*)(h+1), len-4); 393569211Sphk log(-1, ">\n"); 393630300Sjoerg } 393730300Sjoerg break; 393830300Sjoerg } 393930300Sjoerg if (h->ident != sp->confid[IDX_CHAP]) { 394030300Sjoerg if (debug) 394130300Sjoerg log(LOG_DEBUG, 394240008Sjoerg SPP_FMT "chap dropping response for old ID " 394330300Sjoerg "(got %d, expected %d)\n", 394440008Sjoerg SPP_ARGS(ifp), 394530300Sjoerg h->ident, sp->confid[IDX_CHAP]); 394630300Sjoerg break; 394730300Sjoerg } 394830300Sjoerg if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) 394930300Sjoerg || bcmp(name, sp->hisauth.name, name_len) != 0) { 395040008Sjoerg log(LOG_INFO, SPP_FMT "chap response, his name ", 395140008Sjoerg SPP_ARGS(ifp)); 395230300Sjoerg sppp_print_string(name, name_len); 395369211Sphk log(-1, " != expected "); 395430300Sjoerg sppp_print_string(sp->hisauth.name, 395530300Sjoerg sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)); 395669211Sphk log(-1, "\n"); 395770199Sjhay } 395830300Sjoerg if (debug) { 395940008Sjoerg log(LOG_DEBUG, SPP_FMT "chap input(%s) " 396030300Sjoerg "<%s id=0x%x len=%d name=", 396140008Sjoerg SPP_ARGS(ifp), 396230300Sjoerg sppp_state_name(sp->state[IDX_CHAP]), 396330300Sjoerg sppp_auth_type_name(PPP_CHAP, h->type), 396430300Sjoerg h->ident, ntohs (h->len)); 396530300Sjoerg sppp_print_string((char*)name, name_len); 396669211Sphk log(-1, " value-size=%d value=", value_len); 396730300Sjoerg sppp_print_bytes(value, value_len); 396869211Sphk log(-1, ">\n"); 396930300Sjoerg } 397030300Sjoerg if (value_len != AUTHKEYLEN) { 397130300Sjoerg if (debug) 397230300Sjoerg log(LOG_DEBUG, 397340008Sjoerg SPP_FMT "chap bad hash value length: " 397430300Sjoerg "%d bytes, should be %d\n", 397540008Sjoerg SPP_ARGS(ifp), value_len, 397630300Sjoerg AUTHKEYLEN); 397730300Sjoerg break; 397830300Sjoerg } 397930300Sjoerg 398030300Sjoerg MD5Init(&ctx); 398130300Sjoerg MD5Update(&ctx, &h->ident, 1); 398230300Sjoerg MD5Update(&ctx, sp->hisauth.secret, 398330300Sjoerg sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN)); 398430300Sjoerg MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN); 398530300Sjoerg MD5Final(digest, &ctx); 398630300Sjoerg 398730300Sjoerg#define FAILMSG "Failed..." 398830300Sjoerg#define SUCCMSG "Welcome!" 398930300Sjoerg 399030300Sjoerg if (value_len != sizeof digest || 399130300Sjoerg bcmp(digest, value, value_len) != 0) { 399230300Sjoerg /* action scn, tld */ 399330300Sjoerg sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident, 399430300Sjoerg sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 399530300Sjoerg 0); 399630300Sjoerg chap.tld(sp); 399730300Sjoerg break; 399830300Sjoerg } 399930300Sjoerg /* action sca, perhaps tlu */ 400030300Sjoerg if (sp->state[IDX_CHAP] == STATE_REQ_SENT || 400130300Sjoerg sp->state[IDX_CHAP] == STATE_OPENED) 400230300Sjoerg sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident, 400330300Sjoerg sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 400430300Sjoerg 0); 400530300Sjoerg if (sp->state[IDX_CHAP] == STATE_REQ_SENT) { 400630300Sjoerg sppp_cp_change_state(&chap, sp, STATE_OPENED); 400730300Sjoerg chap.tlu(sp); 400830300Sjoerg } 400930300Sjoerg break; 401030300Sjoerg 401130300Sjoerg default: 401230300Sjoerg /* Unknown CHAP packet type -- ignore. */ 401330300Sjoerg if (debug) { 401440008Sjoerg log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) " 401530300Sjoerg "<0x%x id=0x%xh len=%d", 401640008Sjoerg SPP_ARGS(ifp), 401730300Sjoerg sppp_state_name(sp->state[IDX_CHAP]), 401830300Sjoerg h->type, h->ident, ntohs(h->len)); 401944145Sphk sppp_print_bytes((u_char*)(h+1), len-4); 402069211Sphk log(-1, ">\n"); 402130300Sjoerg } 402230300Sjoerg break; 402330300Sjoerg 402430300Sjoerg } 402530300Sjoerg} 402630300Sjoerg 402730300Sjoergstatic void 402830300Sjoergsppp_chap_init(struct sppp *sp) 402930300Sjoerg{ 403030300Sjoerg /* Chap doesn't have STATE_INITIAL at all. */ 403130300Sjoerg sp->state[IDX_CHAP] = STATE_CLOSED; 403230300Sjoerg sp->fail_counter[IDX_CHAP] = 0; 403378064Sume sp->pp_seq[IDX_CHAP] = 0; 403478064Sume sp->pp_rseq[IDX_CHAP] = 0; 403542065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 403630300Sjoerg callout_handle_init(&sp->ch[IDX_CHAP]); 403740008Sjoerg#endif 403830300Sjoerg} 403930300Sjoerg 404030300Sjoergstatic void 404130300Sjoergsppp_chap_open(struct sppp *sp) 404230300Sjoerg{ 404330300Sjoerg if (sp->myauth.proto == PPP_CHAP && 404430300Sjoerg (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 404530300Sjoerg /* we are authenticator for CHAP, start it */ 404630300Sjoerg chap.scr(sp); 404730300Sjoerg sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 404830300Sjoerg sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 404930300Sjoerg } 405030300Sjoerg /* nothing to be done if we are peer, await a challenge */ 405130300Sjoerg} 405230300Sjoerg 405330300Sjoergstatic void 405430300Sjoergsppp_chap_close(struct sppp *sp) 405530300Sjoerg{ 405630300Sjoerg if (sp->state[IDX_CHAP] != STATE_CLOSED) 405730300Sjoerg sppp_cp_change_state(&chap, sp, STATE_CLOSED); 405830300Sjoerg} 405930300Sjoerg 406030300Sjoergstatic void 406130300Sjoergsppp_chap_TO(void *cookie) 406230300Sjoerg{ 406330300Sjoerg struct sppp *sp = (struct sppp *)cookie; 406430300Sjoerg STDDCL; 406530300Sjoerg int s; 406630300Sjoerg 406730300Sjoerg s = splimp(); 406830300Sjoerg if (debug) 406940008Sjoerg log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n", 407040008Sjoerg SPP_ARGS(ifp), 407130300Sjoerg sppp_state_name(sp->state[IDX_CHAP]), 407230300Sjoerg sp->rst_counter[IDX_CHAP]); 407330300Sjoerg 407430300Sjoerg if (--sp->rst_counter[IDX_CHAP] < 0) 407530300Sjoerg /* TO- event */ 407630300Sjoerg switch (sp->state[IDX_CHAP]) { 407730300Sjoerg case STATE_REQ_SENT: 407830300Sjoerg chap.tld(sp); 407930300Sjoerg sppp_cp_change_state(&chap, sp, STATE_CLOSED); 408030300Sjoerg break; 408130300Sjoerg } 408230300Sjoerg else 408330300Sjoerg /* TO+ (or TO*) event */ 408430300Sjoerg switch (sp->state[IDX_CHAP]) { 408530300Sjoerg case STATE_OPENED: 408630300Sjoerg /* TO* event */ 408730300Sjoerg sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 408830300Sjoerg /* fall through */ 408930300Sjoerg case STATE_REQ_SENT: 409030300Sjoerg chap.scr(sp); 409130300Sjoerg /* sppp_cp_change_state() will restart the timer */ 409230300Sjoerg sppp_cp_change_state(&chap, sp, STATE_REQ_SENT); 409330300Sjoerg break; 409430300Sjoerg } 409530300Sjoerg 409630300Sjoerg splx(s); 409730300Sjoerg} 409830300Sjoerg 409930300Sjoergstatic void 410030300Sjoergsppp_chap_tlu(struct sppp *sp) 410130300Sjoerg{ 410230300Sjoerg STDDCL; 410330300Sjoerg int i, x; 410430300Sjoerg 410540010Sjoerg i = 0; 410630300Sjoerg sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure; 410730300Sjoerg 410830300Sjoerg /* 410930300Sjoerg * Some broken CHAP implementations (Conware CoNet, firmware 411030300Sjoerg * 4.0.?) don't want to re-authenticate their CHAP once the 411130300Sjoerg * initial challenge-response exchange has taken place. 411230300Sjoerg * Provide for an option to avoid rechallenges. 411330300Sjoerg */ 411430300Sjoerg if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) { 411530300Sjoerg /* 411630300Sjoerg * Compute the re-challenge timeout. This will yield 411730300Sjoerg * a number between 300 and 810 seconds. 411830300Sjoerg */ 411930300Sjoerg i = 300 + ((unsigned)(random() & 0xff00) >> 7); 412042064Sphk TIMEOUT(chap.TO, (void *)sp, i * hz, sp->ch[IDX_CHAP]); 412130300Sjoerg } 412230300Sjoerg 412330300Sjoerg if (debug) { 412430300Sjoerg log(LOG_DEBUG, 412540008Sjoerg SPP_FMT "chap %s, ", 412640008Sjoerg SPP_ARGS(ifp), 412730300Sjoerg sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu"); 412830300Sjoerg if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) 412969211Sphk log(-1, "next re-challenge in %d seconds\n", i); 413030300Sjoerg else 413169211Sphk log(-1, "re-challenging supressed\n"); 413230300Sjoerg } 413330300Sjoerg 413430300Sjoerg x = splimp(); 413530300Sjoerg /* indicate to LCP that we need to be closed down */ 413630300Sjoerg sp->lcp.protos |= (1 << IDX_CHAP); 413730300Sjoerg 413830300Sjoerg if (sp->pp_flags & PP_NEEDAUTH) { 413930300Sjoerg /* 414030300Sjoerg * Remote is authenticator, but his auth proto didn't 414130300Sjoerg * complete yet. Defer the transition to network 414230300Sjoerg * phase. 414330300Sjoerg */ 414430300Sjoerg splx(x); 414530300Sjoerg return; 414630300Sjoerg } 414730300Sjoerg splx(x); 414830300Sjoerg 414930300Sjoerg /* 415030300Sjoerg * If we are already in phase network, we are done here. This 415130300Sjoerg * is the case if this is a dummy tlu event after a re-challenge. 415230300Sjoerg */ 415330300Sjoerg if (sp->pp_phase != PHASE_NETWORK) 415430300Sjoerg sppp_phase_network(sp); 415530300Sjoerg} 415630300Sjoerg 415730300Sjoergstatic void 415830300Sjoergsppp_chap_tld(struct sppp *sp) 415930300Sjoerg{ 416030300Sjoerg STDDCL; 416130300Sjoerg 416230300Sjoerg if (debug) 416340008Sjoerg log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp)); 416440008Sjoerg UNTIMEOUT(chap.TO, (void *)sp, sp->ch[IDX_CHAP]); 416530300Sjoerg sp->lcp.protos &= ~(1 << IDX_CHAP); 416630300Sjoerg 416730300Sjoerg lcp.Close(sp); 416830300Sjoerg} 416930300Sjoerg 417030300Sjoergstatic void 417130300Sjoergsppp_chap_scr(struct sppp *sp) 417230300Sjoerg{ 417330300Sjoerg u_long *ch, seed; 417430300Sjoerg u_char clen; 417530300Sjoerg 417630300Sjoerg /* Compute random challenge. */ 417730300Sjoerg ch = (u_long *)sp->myauth.challenge; 417842065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 417935064Sphk read_random(&seed, sizeof seed); 418040008Sjoerg#else 418142104Sphk { 418242104Sphk struct timeval tv; 418340008Sjoerg microtime(&tv); 418440008Sjoerg seed = tv.tv_sec ^ tv.tv_usec; 418542104Sphk } 418640008Sjoerg#endif 418730300Sjoerg ch[0] = seed ^ random(); 418830300Sjoerg ch[1] = seed ^ random(); 418930300Sjoerg ch[2] = seed ^ random(); 419030300Sjoerg ch[3] = seed ^ random(); 419130300Sjoerg clen = AUTHKEYLEN; 419230300Sjoerg 419378064Sume sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP]; 419430300Sjoerg 419530300Sjoerg sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP], 419630300Sjoerg sizeof clen, (const char *)&clen, 419740008Sjoerg (size_t)AUTHKEYLEN, sp->myauth.challenge, 419840008Sjoerg (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN), 419930300Sjoerg sp->myauth.name, 420030300Sjoerg 0); 420130300Sjoerg} 420270199Sjhay 420370199Sjhay/* 420430300Sjoerg *--------------------------------------------------------------------------* 420530300Sjoerg * * 420630300Sjoerg * The PAP implementation. * 420730300Sjoerg * * 420830300Sjoerg *--------------------------------------------------------------------------* 420930300Sjoerg */ 421030300Sjoerg/* 421130300Sjoerg * For PAP, we need to keep a little state also if we are the peer, not the 421230300Sjoerg * authenticator. This is since we don't get a request to authenticate, but 421330300Sjoerg * have to repeatedly authenticate ourself until we got a response (or the 421430300Sjoerg * retry counter is expired). 421530300Sjoerg */ 421630300Sjoerg 421730300Sjoerg/* 421830300Sjoerg * Handle incoming PAP packets. */ 421930300Sjoergstatic void 422030300Sjoergsppp_pap_input(struct sppp *sp, struct mbuf *m) 422130300Sjoerg{ 422230300Sjoerg STDDCL; 422330300Sjoerg struct lcp_header *h; 422430300Sjoerg int len, x; 422530300Sjoerg u_char *name, *passwd, mlen; 422630300Sjoerg int name_len, passwd_len; 422730300Sjoerg 422830300Sjoerg len = m->m_pkthdr.len; 422930300Sjoerg if (len < 5) { 423030300Sjoerg if (debug) 423130300Sjoerg log(LOG_DEBUG, 423240008Sjoerg SPP_FMT "pap invalid packet length: %d bytes\n", 423340008Sjoerg SPP_ARGS(ifp), len); 423430300Sjoerg return; 423530300Sjoerg } 423630300Sjoerg h = mtod (m, struct lcp_header*); 423730300Sjoerg if (len > ntohs (h->len)) 423830300Sjoerg len = ntohs (h->len); 423930300Sjoerg switch (h->type) { 424030300Sjoerg /* PAP request is my authproto */ 424130300Sjoerg case PAP_REQ: 424230300Sjoerg name = 1 + (u_char*)(h+1); 424330300Sjoerg name_len = name[-1]; 424430300Sjoerg passwd = name + name_len + 1; 424530300Sjoerg if (name_len > len - 6 || 424630300Sjoerg (passwd_len = passwd[-1]) > len - 6 - name_len) { 424730300Sjoerg if (debug) { 424840008Sjoerg log(LOG_DEBUG, SPP_FMT "pap corrupted input " 424930300Sjoerg "<%s id=0x%x len=%d", 425040008Sjoerg SPP_ARGS(ifp), 425130300Sjoerg sppp_auth_type_name(PPP_PAP, h->type), 425230300Sjoerg h->ident, ntohs(h->len)); 425344145Sphk sppp_print_bytes((u_char*)(h+1), len-4); 425469211Sphk log(-1, ">\n"); 425530300Sjoerg } 425630300Sjoerg break; 425730300Sjoerg } 425830300Sjoerg if (debug) { 425940008Sjoerg log(LOG_DEBUG, SPP_FMT "pap input(%s) " 426030300Sjoerg "<%s id=0x%x len=%d name=", 426140008Sjoerg SPP_ARGS(ifp), 426230300Sjoerg sppp_state_name(sp->state[IDX_PAP]), 426330300Sjoerg sppp_auth_type_name(PPP_PAP, h->type), 426430300Sjoerg h->ident, ntohs(h->len)); 426530300Sjoerg sppp_print_string((char*)name, name_len); 426669211Sphk log(-1, " passwd="); 426730300Sjoerg sppp_print_string((char*)passwd, passwd_len); 426869211Sphk log(-1, ">\n"); 426930300Sjoerg } 427074774Sjoerg if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) || 427174774Sjoerg passwd_len != sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN) || 427230300Sjoerg bcmp(name, sp->hisauth.name, name_len) != 0 || 427330300Sjoerg bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) { 427430300Sjoerg /* action scn, tld */ 427530300Sjoerg mlen = sizeof(FAILMSG) - 1; 427630300Sjoerg sppp_auth_send(&pap, sp, PAP_NAK, h->ident, 427730300Sjoerg sizeof mlen, (const char *)&mlen, 427830300Sjoerg sizeof(FAILMSG) - 1, (u_char *)FAILMSG, 427930300Sjoerg 0); 428030300Sjoerg pap.tld(sp); 428130300Sjoerg break; 428230300Sjoerg } 428330300Sjoerg /* action sca, perhaps tlu */ 428430300Sjoerg if (sp->state[IDX_PAP] == STATE_REQ_SENT || 428530300Sjoerg sp->state[IDX_PAP] == STATE_OPENED) { 428630300Sjoerg mlen = sizeof(SUCCMSG) - 1; 428730300Sjoerg sppp_auth_send(&pap, sp, PAP_ACK, h->ident, 428830300Sjoerg sizeof mlen, (const char *)&mlen, 428930300Sjoerg sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG, 429030300Sjoerg 0); 429130300Sjoerg } 429230300Sjoerg if (sp->state[IDX_PAP] == STATE_REQ_SENT) { 429330300Sjoerg sppp_cp_change_state(&pap, sp, STATE_OPENED); 429430300Sjoerg pap.tlu(sp); 429530300Sjoerg } 429630300Sjoerg break; 429730300Sjoerg 429830300Sjoerg /* ack and nak are his authproto */ 429930300Sjoerg case PAP_ACK: 430040008Sjoerg UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch); 430130300Sjoerg if (debug) { 430240008Sjoerg log(LOG_DEBUG, SPP_FMT "pap success", 430340008Sjoerg SPP_ARGS(ifp)); 430430300Sjoerg name_len = *((char *)h); 430530300Sjoerg if (len > 5 && name_len) { 430669211Sphk log(-1, ": "); 430730300Sjoerg sppp_print_string((char*)(h+1), name_len); 430830300Sjoerg } 430969211Sphk log(-1, "\n"); 431030300Sjoerg } 431130300Sjoerg x = splimp(); 431230300Sjoerg sp->pp_flags &= ~PP_NEEDAUTH; 431330300Sjoerg if (sp->myauth.proto == PPP_PAP && 431432169Sgj (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) && 431530300Sjoerg (sp->lcp.protos & (1 << IDX_PAP)) == 0) { 431630300Sjoerg /* 431730300Sjoerg * We are authenticator for PAP but didn't 431830300Sjoerg * complete yet. Leave it to tlu to proceed 431930300Sjoerg * to network phase. 432030300Sjoerg */ 432130300Sjoerg splx(x); 432230300Sjoerg break; 432330300Sjoerg } 432430300Sjoerg splx(x); 432530300Sjoerg sppp_phase_network(sp); 432630300Sjoerg break; 432730300Sjoerg 432830300Sjoerg case PAP_NAK: 432940008Sjoerg UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch); 433030300Sjoerg if (debug) { 433140008Sjoerg log(LOG_INFO, SPP_FMT "pap failure", 433240008Sjoerg SPP_ARGS(ifp)); 433330300Sjoerg name_len = *((char *)h); 433430300Sjoerg if (len > 5 && name_len) { 433569211Sphk log(-1, ": "); 433630300Sjoerg sppp_print_string((char*)(h+1), name_len); 433730300Sjoerg } 433869211Sphk log(-1, "\n"); 433930300Sjoerg } else 434040008Sjoerg log(LOG_INFO, SPP_FMT "pap failure\n", 434140008Sjoerg SPP_ARGS(ifp)); 434230300Sjoerg /* await LCP shutdown by authenticator */ 434330300Sjoerg break; 434430300Sjoerg 434530300Sjoerg default: 434630300Sjoerg /* Unknown PAP packet type -- ignore. */ 434730300Sjoerg if (debug) { 434840008Sjoerg log(LOG_DEBUG, SPP_FMT "pap corrupted input " 434930300Sjoerg "<0x%x id=0x%x len=%d", 435040008Sjoerg SPP_ARGS(ifp), 435130300Sjoerg h->type, h->ident, ntohs(h->len)); 435244145Sphk sppp_print_bytes((u_char*)(h+1), len-4); 435369211Sphk log(-1, ">\n"); 435430300Sjoerg } 435530300Sjoerg break; 435630300Sjoerg 435730300Sjoerg } 435830300Sjoerg} 435930300Sjoerg 436030300Sjoergstatic void 436130300Sjoergsppp_pap_init(struct sppp *sp) 436230300Sjoerg{ 436330300Sjoerg /* PAP doesn't have STATE_INITIAL at all. */ 436430300Sjoerg sp->state[IDX_PAP] = STATE_CLOSED; 436530300Sjoerg sp->fail_counter[IDX_PAP] = 0; 436678064Sume sp->pp_seq[IDX_PAP] = 0; 436778064Sume sp->pp_rseq[IDX_PAP] = 0; 436842065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 436930300Sjoerg callout_handle_init(&sp->ch[IDX_PAP]); 437030300Sjoerg callout_handle_init(&sp->pap_my_to_ch); 437140008Sjoerg#endif 437230300Sjoerg} 437330300Sjoerg 437430300Sjoergstatic void 437530300Sjoergsppp_pap_open(struct sppp *sp) 437630300Sjoerg{ 437730300Sjoerg if (sp->hisauth.proto == PPP_PAP && 437830300Sjoerg (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) { 437930300Sjoerg /* we are authenticator for PAP, start our timer */ 438030300Sjoerg sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 438130300Sjoerg sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 438230300Sjoerg } 438330300Sjoerg if (sp->myauth.proto == PPP_PAP) { 438430300Sjoerg /* we are peer, send a request, and start a timer */ 438530300Sjoerg pap.scr(sp); 438642064Sphk TIMEOUT(sppp_pap_my_TO, (void *)sp, sp->lcp.timeout, 438742064Sphk sp->pap_my_to_ch); 438830300Sjoerg } 438930300Sjoerg} 439030300Sjoerg 439130300Sjoergstatic void 439230300Sjoergsppp_pap_close(struct sppp *sp) 439330300Sjoerg{ 439430300Sjoerg if (sp->state[IDX_PAP] != STATE_CLOSED) 439530300Sjoerg sppp_cp_change_state(&pap, sp, STATE_CLOSED); 439630300Sjoerg} 439730300Sjoerg 439830300Sjoerg/* 439930300Sjoerg * That's the timeout routine if we are authenticator. Since the 440030300Sjoerg * authenticator is basically passive in PAP, we can't do much here. 440130300Sjoerg */ 440230300Sjoergstatic void 440330300Sjoergsppp_pap_TO(void *cookie) 440430300Sjoerg{ 440530300Sjoerg struct sppp *sp = (struct sppp *)cookie; 440630300Sjoerg STDDCL; 440730300Sjoerg int s; 440830300Sjoerg 440930300Sjoerg s = splimp(); 441030300Sjoerg if (debug) 441140008Sjoerg log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n", 441240008Sjoerg SPP_ARGS(ifp), 441330300Sjoerg sppp_state_name(sp->state[IDX_PAP]), 441430300Sjoerg sp->rst_counter[IDX_PAP]); 441530300Sjoerg 441630300Sjoerg if (--sp->rst_counter[IDX_PAP] < 0) 441730300Sjoerg /* TO- event */ 441830300Sjoerg switch (sp->state[IDX_PAP]) { 441930300Sjoerg case STATE_REQ_SENT: 442030300Sjoerg pap.tld(sp); 442130300Sjoerg sppp_cp_change_state(&pap, sp, STATE_CLOSED); 442230300Sjoerg break; 442330300Sjoerg } 442430300Sjoerg else 442530300Sjoerg /* TO+ event, not very much we could do */ 442630300Sjoerg switch (sp->state[IDX_PAP]) { 442730300Sjoerg case STATE_REQ_SENT: 442830300Sjoerg /* sppp_cp_change_state() will restart the timer */ 442930300Sjoerg sppp_cp_change_state(&pap, sp, STATE_REQ_SENT); 443030300Sjoerg break; 443130300Sjoerg } 443230300Sjoerg 443330300Sjoerg splx(s); 443430300Sjoerg} 443530300Sjoerg 443630300Sjoerg/* 443730300Sjoerg * That's the timeout handler if we are peer. Since the peer is active, 443830300Sjoerg * we need to retransmit our PAP request since it is apparently lost. 443930300Sjoerg * XXX We should impose a max counter. 444030300Sjoerg */ 444130300Sjoergstatic void 444230300Sjoergsppp_pap_my_TO(void *cookie) 444330300Sjoerg{ 444430300Sjoerg struct sppp *sp = (struct sppp *)cookie; 444530300Sjoerg STDDCL; 444630300Sjoerg 444730300Sjoerg if (debug) 444840008Sjoerg log(LOG_DEBUG, SPP_FMT "pap peer TO\n", 444940008Sjoerg SPP_ARGS(ifp)); 445030300Sjoerg 445130300Sjoerg pap.scr(sp); 445230300Sjoerg} 445330300Sjoerg 445430300Sjoergstatic void 445530300Sjoergsppp_pap_tlu(struct sppp *sp) 445630300Sjoerg{ 445730300Sjoerg STDDCL; 445830300Sjoerg int x; 445930300Sjoerg 446030300Sjoerg sp->rst_counter[IDX_PAP] = sp->lcp.max_configure; 446130300Sjoerg 446230300Sjoerg if (debug) 446340008Sjoerg log(LOG_DEBUG, SPP_FMT "%s tlu\n", 446440008Sjoerg SPP_ARGS(ifp), pap.name); 446530300Sjoerg 446630300Sjoerg x = splimp(); 446730300Sjoerg /* indicate to LCP that we need to be closed down */ 446830300Sjoerg sp->lcp.protos |= (1 << IDX_PAP); 446930300Sjoerg 447030300Sjoerg if (sp->pp_flags & PP_NEEDAUTH) { 447130300Sjoerg /* 447230300Sjoerg * Remote is authenticator, but his auth proto didn't 447330300Sjoerg * complete yet. Defer the transition to network 447430300Sjoerg * phase. 447530300Sjoerg */ 447630300Sjoerg splx(x); 447730300Sjoerg return; 447830300Sjoerg } 447930300Sjoerg splx(x); 448030300Sjoerg sppp_phase_network(sp); 448130300Sjoerg} 448230300Sjoerg 448330300Sjoergstatic void 448430300Sjoergsppp_pap_tld(struct sppp *sp) 448530300Sjoerg{ 448630300Sjoerg STDDCL; 448730300Sjoerg 448830300Sjoerg if (debug) 448940008Sjoerg log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp)); 449040008Sjoerg UNTIMEOUT(pap.TO, (void *)sp, sp->ch[IDX_PAP]); 449140008Sjoerg UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch); 449230300Sjoerg sp->lcp.protos &= ~(1 << IDX_PAP); 449330300Sjoerg 449430300Sjoerg lcp.Close(sp); 449530300Sjoerg} 449630300Sjoerg 449730300Sjoergstatic void 449830300Sjoergsppp_pap_scr(struct sppp *sp) 449930300Sjoerg{ 450030300Sjoerg u_char idlen, pwdlen; 450130300Sjoerg 450278064Sume sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP]; 450330300Sjoerg pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN); 450430300Sjoerg idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN); 450530300Sjoerg 450630300Sjoerg sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP], 450730300Sjoerg sizeof idlen, (const char *)&idlen, 450840008Sjoerg (size_t)idlen, sp->myauth.name, 450930300Sjoerg sizeof pwdlen, (const char *)&pwdlen, 451040008Sjoerg (size_t)pwdlen, sp->myauth.secret, 451130300Sjoerg 0); 451230300Sjoerg} 451370199Sjhay 451470199Sjhay/* 451525944Sjoerg * Random miscellaneous functions. 451625944Sjoerg */ 451725944Sjoerg 45184910Swollman/* 451930300Sjoerg * Send a PAP or CHAP proto packet. 452030300Sjoerg * 452130300Sjoerg * Varadic function, each of the elements for the ellipsis is of type 452240008Sjoerg * ``size_t mlen, const u_char *msg''. Processing will stop iff 452330300Sjoerg * mlen == 0. 452442104Sphk * NOTE: never declare variadic functions with types subject to type 452542104Sphk * promotion (i.e. u_char). This is asking for big trouble depending 452642104Sphk * on the architecture you are on... 452730300Sjoerg */ 452830300Sjoerg 452930300Sjoergstatic void 453042104Sphksppp_auth_send(const struct cp *cp, struct sppp *sp, 453142104Sphk unsigned int type, unsigned int id, 453230300Sjoerg ...) 453330300Sjoerg{ 453430300Sjoerg STDDCL; 453530300Sjoerg struct ppp_header *h; 453630300Sjoerg struct lcp_header *lh; 453730300Sjoerg struct mbuf *m; 453830300Sjoerg u_char *p; 453930300Sjoerg int len; 454042104Sphk unsigned int mlen; 454130300Sjoerg const char *msg; 454230300Sjoerg va_list ap; 454330300Sjoerg 454430300Sjoerg MGETHDR (m, M_DONTWAIT, MT_DATA); 454530300Sjoerg if (! m) 454630300Sjoerg return; 454730300Sjoerg m->m_pkthdr.rcvif = 0; 454830300Sjoerg 454930300Sjoerg h = mtod (m, struct ppp_header*); 455030300Sjoerg h->address = PPP_ALLSTATIONS; /* broadcast address */ 455130300Sjoerg h->control = PPP_UI; /* Unnumbered Info */ 455230300Sjoerg h->protocol = htons(cp->proto); 455330300Sjoerg 455430300Sjoerg lh = (struct lcp_header*)(h + 1); 455530300Sjoerg lh->type = type; 455630300Sjoerg lh->ident = id; 455730300Sjoerg p = (u_char*) (lh+1); 455830300Sjoerg 455930300Sjoerg va_start(ap, id); 456030300Sjoerg len = 0; 456130300Sjoerg 456242104Sphk while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) { 456330300Sjoerg msg = va_arg(ap, const char *); 456430300Sjoerg len += mlen; 456530300Sjoerg if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) { 456630300Sjoerg va_end(ap); 456730300Sjoerg m_freem(m); 456830300Sjoerg return; 456930300Sjoerg } 457030300Sjoerg 457130300Sjoerg bcopy(msg, p, mlen); 457230300Sjoerg p += mlen; 457330300Sjoerg } 457430300Sjoerg va_end(ap); 457530300Sjoerg 457630300Sjoerg m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len; 457730300Sjoerg lh->len = htons (LCP_HEADER_LEN + len); 457830300Sjoerg 457930300Sjoerg if (debug) { 458040008Sjoerg log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d", 458140008Sjoerg SPP_ARGS(ifp), cp->name, 458230300Sjoerg sppp_auth_type_name(cp->proto, lh->type), 458330300Sjoerg lh->ident, ntohs(lh->len)); 458444145Sphk sppp_print_bytes((u_char*) (lh+1), len); 458569211Sphk log(-1, ">\n"); 458630300Sjoerg } 458769152Sjlemon if (! IF_HANDOFF_ADJ(&sp->pp_cpq, m, ifp, 3)) 458869152Sjlemon ifp->if_oerrors++; 458930300Sjoerg} 459030300Sjoerg 459130300Sjoerg/* 459225944Sjoerg * Flush interface queue. 45934910Swollman */ 459412820Sphkstatic void 459525944Sjoergsppp_qflush(struct ifqueue *ifq) 45964910Swollman{ 459725944Sjoerg struct mbuf *m, *n; 45984910Swollman 459925944Sjoerg n = ifq->ifq_head; 460025944Sjoerg while ((m = n)) { 460125944Sjoerg n = m->m_act; 460225944Sjoerg m_freem (m); 460311189Sjkh } 460425944Sjoerg ifq->ifq_head = 0; 460525944Sjoerg ifq->ifq_tail = 0; 460625944Sjoerg ifq->ifq_len = 0; 460725944Sjoerg} 460825944Sjoerg 460925944Sjoerg/* 461025944Sjoerg * Send keepalive packets, every 10 seconds. 461125944Sjoerg */ 461225944Sjoergstatic void 461325944Sjoergsppp_keepalive(void *dummy) 461425944Sjoerg{ 461525944Sjoerg struct sppp *sp; 461625944Sjoerg int s; 461725944Sjoerg 461825944Sjoerg s = splimp(); 461925944Sjoerg for (sp=spppq; sp; sp=sp->pp_next) { 462025944Sjoerg struct ifnet *ifp = &sp->pp_if; 462125944Sjoerg 462225944Sjoerg /* Keepalive mode disabled or channel down? */ 462325944Sjoerg if (! (sp->pp_flags & PP_KEEPALIVE) || 462425944Sjoerg ! (ifp->if_flags & IFF_RUNNING)) 462525944Sjoerg continue; 462625944Sjoerg 462725944Sjoerg /* No keepalive in PPP mode if LCP not opened yet. */ 462845152Sphk if (sp->pp_mode != IFF_CISCO && 462925944Sjoerg sp->pp_phase < PHASE_AUTHENTICATE) 463025944Sjoerg continue; 463125944Sjoerg 463225944Sjoerg if (sp->pp_alivecnt == MAXALIVECNT) { 463325944Sjoerg /* No keepalive packets got. Stop the interface. */ 463440008Sjoerg printf (SPP_FMT "down\n", SPP_ARGS(ifp)); 463525944Sjoerg if_down (ifp); 463626018Sjoerg sppp_qflush (&sp->pp_cpq); 463745152Sphk if (sp->pp_mode != IFF_CISCO) { 463825944Sjoerg /* XXX */ 463925944Sjoerg /* Shut down the PPP link. */ 464025944Sjoerg lcp.Down(sp); 464125944Sjoerg /* Initiate negotiation. XXX */ 464225944Sjoerg lcp.Up(sp); 464325944Sjoerg } 46444910Swollman } 464525944Sjoerg if (sp->pp_alivecnt <= MAXALIVECNT) 464625944Sjoerg ++sp->pp_alivecnt; 464745152Sphk if (sp->pp_mode == IFF_CISCO) 464878064Sume sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, 464978064Sume ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]); 465025944Sjoerg else if (sp->pp_phase >= PHASE_AUTHENTICATE) { 465125944Sjoerg long nmagic = htonl (sp->lcp.magic); 465278064Sume sp->lcp.echoid = ++sp->pp_seq[IDX_LCP]; 465325944Sjoerg sppp_cp_send (sp, PPP_LCP, ECHO_REQ, 465425944Sjoerg sp->lcp.echoid, 4, &nmagic); 465525944Sjoerg } 46564910Swollman } 465725944Sjoerg splx(s); 465842064Sphk TIMEOUT(sppp_keepalive, 0, hz * 10, keepalive_ch); 46594910Swollman} 46604910Swollman 466125944Sjoerg/* 466225944Sjoerg * Get both IP addresses. 466325944Sjoerg */ 466425944Sjoergstatic void 466530300Sjoergsppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask) 466625944Sjoerg{ 466725944Sjoerg struct ifnet *ifp = &sp->pp_if; 466825944Sjoerg struct ifaddr *ifa; 466930300Sjoerg struct sockaddr_in *si, *sm; 467025944Sjoerg u_long ssrc, ddst; 467125944Sjoerg 467240010Sjoerg sm = NULL; 467325944Sjoerg ssrc = ddst = 0L; 467425944Sjoerg /* 467525944Sjoerg * Pick the first AF_INET address from the list, 467625944Sjoerg * aliases don't make any sense on a p2p link anyway. 467725944Sjoerg */ 467842065Sphk si = 0; 467942065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 468042065Sphk TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 468142104Sphk#elif defined(__NetBSD__) || defined (__OpenBSD__) 468271959Sphk for (ifa = TAILQ_FIRST(&ifp->if_addrlist); 468340008Sjoerg ifa; 468471959Sphk ifa = TAILQ_NEXT(ifa, ifa_list)) 468542104Sphk#else 468642104Sphk for (ifa = ifp->if_addrlist; 468742104Sphk ifa; 468842104Sphk ifa = ifa->ifa_next) 468940008Sjoerg#endif 469025944Sjoerg if (ifa->ifa_addr->sa_family == AF_INET) { 469125944Sjoerg si = (struct sockaddr_in *)ifa->ifa_addr; 469230300Sjoerg sm = (struct sockaddr_in *)ifa->ifa_netmask; 469325944Sjoerg if (si) 469425944Sjoerg break; 469525944Sjoerg } 469625944Sjoerg if (ifa) { 469730300Sjoerg if (si && si->sin_addr.s_addr) { 469825944Sjoerg ssrc = si->sin_addr.s_addr; 469930300Sjoerg if (srcmask) 470030300Sjoerg *srcmask = ntohl(sm->sin_addr.s_addr); 470130300Sjoerg } 470225944Sjoerg 470325944Sjoerg si = (struct sockaddr_in *)ifa->ifa_dstaddr; 470425944Sjoerg if (si && si->sin_addr.s_addr) 470525944Sjoerg ddst = si->sin_addr.s_addr; 470625944Sjoerg } 470725944Sjoerg 470825944Sjoerg if (dst) *dst = ntohl(ddst); 470925944Sjoerg if (src) *src = ntohl(ssrc); 471025944Sjoerg} 471125944Sjoerg 471225944Sjoerg/* 471325944Sjoerg * Set my IP address. Must be called at splimp. 471425944Sjoerg */ 471525944Sjoergstatic void 471625944Sjoergsppp_set_ip_addr(struct sppp *sp, u_long src) 471725944Sjoerg{ 471842104Sphk STDDCL; 471925944Sjoerg struct ifaddr *ifa; 472025944Sjoerg struct sockaddr_in *si; 472184318Sjlemon struct in_ifaddr *ia; 472225944Sjoerg 472325944Sjoerg /* 472425944Sjoerg * Pick the first AF_INET address from the list, 472525944Sjoerg * aliases don't make any sense on a p2p link anyway. 472625944Sjoerg */ 472742065Sphk si = 0; 472842065Sphk#if defined(__FreeBSD__) && __FreeBSD__ >= 3 472942065Sphk TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 473042104Sphk#elif defined(__NetBSD__) || defined (__OpenBSD__) 473171959Sphk for (ifa = TAILQ_FIRST(&ifp->if_addrlist); 473240008Sjoerg ifa; 473371959Sphk ifa = TAILQ_NEXT(ifa, ifa_list)) 473442104Sphk#else 473542104Sphk for (ifa = ifp->if_addrlist; 473642104Sphk ifa; 473742104Sphk ifa = ifa->ifa_next) 473840008Sjoerg#endif 473940008Sjoerg { 474040008Sjoerg if (ifa->ifa_addr->sa_family == AF_INET) 474140008Sjoerg { 474225944Sjoerg si = (struct sockaddr_in *)ifa->ifa_addr; 474325944Sjoerg if (si) 474425944Sjoerg break; 474525944Sjoerg } 474640008Sjoerg } 474740008Sjoerg 474825944Sjoerg if (ifa && si) 474942104Sphk { 475042104Sphk int error; 475142104Sphk#if __NetBSD_Version__ >= 103080000 475242104Sphk struct sockaddr_in new_sin = *si; 475342104Sphk 475442104Sphk new_sin.sin_addr.s_addr = htonl(src); 475542104Sphk error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 1); 475642104Sphk if(debug && error) 475742104Sphk { 475842104Sphk log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: in_ifinit " 475942104Sphk " failed, error=%d\n", SPP_ARGS(ifp), error); 476042104Sphk } 476142104Sphk#else 476242104Sphk /* delete old route */ 476342104Sphk error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST); 476442104Sphk if(debug && error) 476542104Sphk { 476642104Sphk log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n", 476742104Sphk SPP_ARGS(ifp), error); 476842104Sphk } 476942104Sphk 477042104Sphk /* set new address */ 477125944Sjoerg si->sin_addr.s_addr = htonl(src); 477284318Sjlemon ia = ifatoia(ifa); 477384318Sjlemon LIST_REMOVE(ia, ia_hash); 477484318Sjlemon LIST_INSERT_HEAD(INADDR_HASH(si->sin_addr.s_addr), ia, ia_hash); 477525944Sjoerg 477642104Sphk /* add new route */ 477770199Sjhay error = rtinit(ifa, (int)RTM_ADD, RTF_HOST); 477842104Sphk if (debug && error) 477942104Sphk { 478042104Sphk log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d", 478142104Sphk SPP_ARGS(ifp), error); 478242104Sphk } 478342104Sphk#endif 478442104Sphk } 478578064Sume} 478678064Sume 478778064Sume#ifdef INET6 478878064Sume/* 478978064Sume * Get both IPv6 addresses. 479078064Sume */ 479178064Sumestatic void 479278064Sumesppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst, 479378064Sume struct in6_addr *srcmask) 479478064Sume{ 479578064Sume struct ifnet *ifp = &sp->pp_if; 479678064Sume struct ifaddr *ifa; 479778064Sume struct sockaddr_in6 *si, *sm; 479878064Sume struct in6_addr ssrc, ddst; 479978064Sume 480078064Sume sm = NULL; 480178064Sume bzero(&ssrc, sizeof(ssrc)); 480278064Sume bzero(&ddst, sizeof(ddst)); 480378064Sume /* 480478064Sume * Pick the first link-local AF_INET6 address from the list, 480578064Sume * aliases don't make any sense on a p2p link anyway. 480678064Sume */ 480778064Sume#if defined(__FreeBSD__) && __FreeBSD__ >= 3 480878064Sume for (ifa = ifp->if_addrhead.tqh_first, si = 0; 480978064Sume ifa; 481078064Sume ifa = ifa->ifa_link.tqe_next) 481178064Sume#elif defined(__NetBSD__) || defined (__OpenBSD__) 481278064Sume for (ifa = ifp->if_addrlist.tqh_first, si = 0; 481378064Sume ifa; 481478064Sume ifa = ifa->ifa_list.tqe_next) 481578064Sume#else 481678064Sume for (ifa = ifp->if_addrlist, si = 0; 481778064Sume ifa; 481878064Sume ifa = ifa->ifa_next) 481978064Sume#endif 482078064Sume if (ifa->ifa_addr->sa_family == AF_INET6) { 482178064Sume si = (struct sockaddr_in6 *)ifa->ifa_addr; 482278064Sume sm = (struct sockaddr_in6 *)ifa->ifa_netmask; 482378064Sume if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr)) 482478064Sume break; 482578064Sume } 482678064Sume if (ifa) { 482778064Sume if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) { 482878064Sume bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc)); 482978064Sume if (srcmask) { 483078064Sume bcopy(&sm->sin6_addr, srcmask, 483178064Sume sizeof(*srcmask)); 483278064Sume } 483378064Sume } 483478064Sume 483578064Sume si = (struct sockaddr_in6 *)ifa->ifa_dstaddr; 483678064Sume if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) 483778064Sume bcopy(&si->sin6_addr, &ddst, sizeof(ddst)); 483878064Sume } 483978064Sume 484078064Sume if (dst) 484178064Sume bcopy(&ddst, dst, sizeof(*dst)); 484278064Sume if (src) 484378064Sume bcopy(&ssrc, src, sizeof(*src)); 484470199Sjhay} 484542104Sphk 484678064Sume#ifdef IPV6CP_MYIFID_DYN 484778064Sume/* 484878064Sume * Generate random ifid. 484978064Sume */ 485078064Sumestatic void 485178064Sumesppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr) 485278064Sume{ 485378064Sume /* TBD */ 485478064Sume} 485578064Sume 485678064Sume/* 485778064Sume * Set my IPv6 address. Must be called at splimp. 485878064Sume */ 485978064Sumestatic void 486078064Sumesppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src) 486178064Sume{ 486278064Sume STDDCL; 486378064Sume struct ifaddr *ifa; 486478064Sume struct sockaddr_in6 *sin6; 486578064Sume 486678064Sume /* 486778064Sume * Pick the first link-local AF_INET6 address from the list, 486878064Sume * aliases don't make any sense on a p2p link anyway. 486978064Sume */ 487078064Sume 487178064Sume sin6 = NULL; 487278064Sume#if defined(__FreeBSD__) && __FreeBSD__ >= 3 487378064Sume for (ifa = ifp->if_addrhead.tqh_first; 487478064Sume ifa; 487578064Sume ifa = ifa->ifa_link.tqe_next) 487678064Sume#elif defined(__NetBSD__) || defined (__OpenBSD__) 487778064Sume for (ifa = ifp->if_addrlist.tqh_first; 487878064Sume ifa; 487978064Sume ifa = ifa->ifa_list.tqe_next) 488078064Sume#else 488178064Sume for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next) 488278064Sume#endif 488378064Sume { 488478064Sume if (ifa->ifa_addr->sa_family == AF_INET6) 488578064Sume { 488678064Sume sin6 = (struct sockaddr_in6 *)ifa->ifa_addr; 488778064Sume if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr)) 488878064Sume break; 488978064Sume } 489078064Sume } 489178064Sume 489278064Sume if (ifa && sin6) 489378064Sume { 489478064Sume int error; 489578064Sume struct sockaddr_in6 new_sin6 = *sin6; 489678064Sume 489778064Sume bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr)); 489878064Sume error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1); 489978064Sume if (debug && error) 490078064Sume { 490178064Sume log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit " 490278064Sume " failed, error=%d\n", SPP_ARGS(ifp), error); 490378064Sume } 490478064Sume } 490578064Sume} 490678064Sume#endif 490778064Sume 490878064Sume/* 490978064Sume * Suggest a candidate address to be used by peer. 491078064Sume */ 491178064Sumestatic void 491278064Sumesppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest) 491378064Sume{ 491478064Sume struct in6_addr myaddr; 491578064Sume struct timeval tv; 491678064Sume 491778064Sume sppp_get_ip6_addrs(sp, &myaddr, 0, 0); 491878064Sume 491978064Sume myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */ 492078064Sume microtime(&tv); 492178064Sume if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) { 492278064Sume myaddr.s6_addr[14] ^= 0xff; 492378064Sume myaddr.s6_addr[15] ^= 0xff; 492478064Sume } else { 492578064Sume myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff); 492678064Sume myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff); 492778064Sume } 492878064Sume if (suggest) 492978064Sume bcopy(&myaddr, suggest, sizeof(myaddr)); 493078064Sume} 493178064Sume#endif /*INET6*/ 493278064Sume 493330300Sjoergstatic int 493438343Sbdesppp_params(struct sppp *sp, u_long cmd, void *data) 493530300Sjoerg{ 493638343Sbde u_long subcmd; 493730300Sjoerg struct ifreq *ifr = (struct ifreq *)data; 493830300Sjoerg struct spppreq spr; 493930300Sjoerg 494030300Sjoerg /* 494130300Sjoerg * ifr->ifr_data is supposed to point to a struct spppreq. 494230300Sjoerg * Check the cmd word first before attempting to fetch all the 494330300Sjoerg * data. 494430300Sjoerg */ 494530300Sjoerg if ((subcmd = fuword(ifr->ifr_data)) == -1) 494630300Sjoerg return EFAULT; 494730300Sjoerg 494830300Sjoerg if (copyin((caddr_t)ifr->ifr_data, &spr, sizeof spr) != 0) 494930300Sjoerg return EFAULT; 495030300Sjoerg 495130300Sjoerg switch (subcmd) { 495230300Sjoerg case SPPPIOGDEFS: 495330300Sjoerg if (cmd != SIOCGIFGENERIC) 495430300Sjoerg return EINVAL; 495530300Sjoerg /* 495630300Sjoerg * We copy over the entire current state, but clean 495730300Sjoerg * out some of the stuff we don't wanna pass up. 495830300Sjoerg * Remember, SIOCGIFGENERIC is unprotected, and can be 495930300Sjoerg * called by any user. No need to ever get PAP or 496030300Sjoerg * CHAP secrets back to userland anyway. 496130300Sjoerg */ 496288558Sjoerg spr.defs.pp_phase = sp->pp_phase; 496388558Sjoerg spr.defs.enable_vj = sp->enable_vj; 496488558Sjoerg spr.defs.lcp = sp->lcp; 496588558Sjoerg spr.defs.ipcp = sp->ipcp; 496688558Sjoerg spr.defs.ipv6cp = sp->ipv6cp; 496788558Sjoerg spr.defs.myauth = sp->myauth; 496888558Sjoerg spr.defs.hisauth = sp->hisauth; 496930300Sjoerg bzero(spr.defs.myauth.secret, AUTHKEYLEN); 497030300Sjoerg bzero(spr.defs.myauth.challenge, AUTHKEYLEN); 497130300Sjoerg bzero(spr.defs.hisauth.secret, AUTHKEYLEN); 497230300Sjoerg bzero(spr.defs.hisauth.challenge, AUTHKEYLEN); 497388550Sjoerg /* 497488550Sjoerg * Fixup the LCP timeout value to milliseconds so 497588550Sjoerg * spppcontrol doesn't need to bother about the value 497688550Sjoerg * of "hz". We do the reverse calculation below when 497788550Sjoerg * setting it. 497888550Sjoerg */ 497988550Sjoerg spr.defs.lcp.timeout = sp->lcp.timeout * 1000 / hz; 498030300Sjoerg return copyout(&spr, (caddr_t)ifr->ifr_data, sizeof spr); 498130300Sjoerg 498230300Sjoerg case SPPPIOSDEFS: 498330300Sjoerg if (cmd != SIOCSIFGENERIC) 498430300Sjoerg return EINVAL; 498530300Sjoerg /* 498688550Sjoerg * We have a very specific idea of which fields we 498788550Sjoerg * allow being passed back from userland, so to not 498888550Sjoerg * clobber our current state. For one, we only allow 498988550Sjoerg * setting anything if LCP is in dead or establish 499088550Sjoerg * phase. Once the authentication negotiations 499188550Sjoerg * started, the authentication settings must not be 499288550Sjoerg * changed again. (The administrator can force an 499330300Sjoerg * ifconfig down in order to get LCP back into dead 499430300Sjoerg * phase.) 499530300Sjoerg * 499630300Sjoerg * Also, we only allow for authentication parameters to be 499730300Sjoerg * specified. 499830300Sjoerg * 499930300Sjoerg * XXX Should allow to set or clear pp_flags. 500030300Sjoerg * 500130300Sjoerg * Finally, if the respective authentication protocol to 500230300Sjoerg * be used is set differently than 0, but the secret is 500330300Sjoerg * passed as all zeros, we don't trash the existing secret. 500430300Sjoerg * This allows an administrator to change the system name 500530300Sjoerg * only without clobbering the secret (which he didn't get 500630300Sjoerg * back in a previous SPPPIOGDEFS call). However, the 500730300Sjoerg * secrets are cleared if the authentication protocol is 500888550Sjoerg * reset to 0. */ 500988550Sjoerg if (sp->pp_phase != PHASE_DEAD && 501088550Sjoerg sp->pp_phase != PHASE_ESTABLISH) 501130300Sjoerg return EBUSY; 501230300Sjoerg 501330300Sjoerg if ((spr.defs.myauth.proto != 0 && spr.defs.myauth.proto != PPP_PAP && 501430300Sjoerg spr.defs.myauth.proto != PPP_CHAP) || 501530300Sjoerg (spr.defs.hisauth.proto != 0 && spr.defs.hisauth.proto != PPP_PAP && 501630300Sjoerg spr.defs.hisauth.proto != PPP_CHAP)) 501730300Sjoerg return EINVAL; 501830300Sjoerg 501930300Sjoerg if (spr.defs.myauth.proto == 0) 502030300Sjoerg /* resetting myauth */ 502130300Sjoerg bzero(&sp->myauth, sizeof sp->myauth); 502230300Sjoerg else { 502330300Sjoerg /* setting/changing myauth */ 502430300Sjoerg sp->myauth.proto = spr.defs.myauth.proto; 502530300Sjoerg bcopy(spr.defs.myauth.name, sp->myauth.name, AUTHNAMELEN); 502630300Sjoerg if (spr.defs.myauth.secret[0] != '\0') 502730300Sjoerg bcopy(spr.defs.myauth.secret, sp->myauth.secret, 502830300Sjoerg AUTHKEYLEN); 502930300Sjoerg } 503030300Sjoerg if (spr.defs.hisauth.proto == 0) 503130300Sjoerg /* resetting hisauth */ 503230300Sjoerg bzero(&sp->hisauth, sizeof sp->hisauth); 503330300Sjoerg else { 503430300Sjoerg /* setting/changing hisauth */ 503530300Sjoerg sp->hisauth.proto = spr.defs.hisauth.proto; 503630300Sjoerg sp->hisauth.flags = spr.defs.hisauth.flags; 503730300Sjoerg bcopy(spr.defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN); 503830300Sjoerg if (spr.defs.hisauth.secret[0] != '\0') 503930300Sjoerg bcopy(spr.defs.hisauth.secret, sp->hisauth.secret, 504030300Sjoerg AUTHKEYLEN); 504130300Sjoerg } 504288550Sjoerg /* set LCP restart timer timeout */ 504388550Sjoerg if (spr.defs.lcp.timeout != 0) 504488550Sjoerg sp->lcp.timeout = spr.defs.lcp.timeout * hz / 1000; 504588534Sjoerg /* set VJ enable flag */ 504688534Sjoerg sp->enable_vj = spr.defs.enable_vj; 504730300Sjoerg break; 504830300Sjoerg 504930300Sjoerg default: 505030300Sjoerg return EINVAL; 505130300Sjoerg } 505230300Sjoerg 505330300Sjoerg return 0; 505430300Sjoerg} 505530300Sjoerg 505630300Sjoergstatic void 505730300Sjoergsppp_phase_network(struct sppp *sp) 505830300Sjoerg{ 505942066Sphk STDDCL; 506030300Sjoerg int i; 506130300Sjoerg u_long mask; 506230300Sjoerg 506330300Sjoerg sp->pp_phase = PHASE_NETWORK; 506430300Sjoerg 506542066Sphk if (debug) 506642066Sphk log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp), 506742066Sphk sppp_phase_name(sp->pp_phase)); 506830300Sjoerg 506930300Sjoerg /* Notify NCPs now. */ 507030300Sjoerg for (i = 0; i < IDX_COUNT; i++) 507130300Sjoerg if ((cps[i])->flags & CP_NCP) 507230300Sjoerg (cps[i])->Open(sp); 507330300Sjoerg 507430300Sjoerg /* Send Up events to all NCPs. */ 507530300Sjoerg for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1) 507630300Sjoerg if (sp->lcp.protos & mask && ((cps[i])->flags & CP_NCP)) 507730300Sjoerg (cps[i])->Up(sp); 507830300Sjoerg 507930300Sjoerg /* if no NCP is starting, all this was in vain, close down */ 508030300Sjoerg sppp_lcp_check_and_close(sp); 508130300Sjoerg} 508230300Sjoerg 508370199Sjhay 508425706Sjoergstatic const char * 508525944Sjoergsppp_cp_type_name(u_char type) 50864910Swollman{ 508730300Sjoerg static char buf[12]; 50884910Swollman switch (type) { 508930300Sjoerg case CONF_REQ: return "conf-req"; 509030300Sjoerg case CONF_ACK: return "conf-ack"; 509130300Sjoerg case CONF_NAK: return "conf-nak"; 509230300Sjoerg case CONF_REJ: return "conf-rej"; 509330300Sjoerg case TERM_REQ: return "term-req"; 509430300Sjoerg case TERM_ACK: return "term-ack"; 509530300Sjoerg case CODE_REJ: return "code-rej"; 509630300Sjoerg case PROTO_REJ: return "proto-rej"; 509730300Sjoerg case ECHO_REQ: return "echo-req"; 509830300Sjoerg case ECHO_REPLY: return "echo-reply"; 509930300Sjoerg case DISC_REQ: return "discard-req"; 51004910Swollman } 510144145Sphk snprintf (buf, sizeof(buf), "cp/0x%x", type); 510230300Sjoerg return buf; 51034910Swollman} 51044910Swollman 510525706Sjoergstatic const char * 510630300Sjoergsppp_auth_type_name(u_short proto, u_char type) 510730300Sjoerg{ 510830300Sjoerg static char buf[12]; 510930300Sjoerg switch (proto) { 511030300Sjoerg case PPP_CHAP: 511130300Sjoerg switch (type) { 511230300Sjoerg case CHAP_CHALLENGE: return "challenge"; 511330300Sjoerg case CHAP_RESPONSE: return "response"; 511430300Sjoerg case CHAP_SUCCESS: return "success"; 511530300Sjoerg case CHAP_FAILURE: return "failure"; 511630300Sjoerg } 511730300Sjoerg case PPP_PAP: 511830300Sjoerg switch (type) { 511930300Sjoerg case PAP_REQ: return "req"; 512030300Sjoerg case PAP_ACK: return "ack"; 512130300Sjoerg case PAP_NAK: return "nak"; 512230300Sjoerg } 512330300Sjoerg } 512444145Sphk snprintf (buf, sizeof(buf), "auth/0x%x", type); 512530300Sjoerg return buf; 512630300Sjoerg} 512730300Sjoerg 512830300Sjoergstatic const char * 512925944Sjoergsppp_lcp_opt_name(u_char opt) 51304910Swollman{ 513130300Sjoerg static char buf[12]; 513225944Sjoerg switch (opt) { 513330300Sjoerg case LCP_OPT_MRU: return "mru"; 513430300Sjoerg case LCP_OPT_ASYNC_MAP: return "async-map"; 513530300Sjoerg case LCP_OPT_AUTH_PROTO: return "auth-proto"; 513630300Sjoerg case LCP_OPT_QUAL_PROTO: return "qual-proto"; 513730300Sjoerg case LCP_OPT_MAGIC: return "magic"; 513830300Sjoerg case LCP_OPT_PROTO_COMP: return "proto-comp"; 513930300Sjoerg case LCP_OPT_ADDR_COMP: return "addr-comp"; 51404910Swollman } 514144145Sphk snprintf (buf, sizeof(buf), "lcp/0x%x", opt); 514230300Sjoerg return buf; 51434910Swollman} 51444910Swollman 514525944Sjoergstatic const char * 514625944Sjoergsppp_ipcp_opt_name(u_char opt) 514725944Sjoerg{ 514830300Sjoerg static char buf[12]; 514925944Sjoerg switch (opt) { 515030300Sjoerg case IPCP_OPT_ADDRESSES: return "addresses"; 515130300Sjoerg case IPCP_OPT_COMPRESSION: return "compression"; 515230300Sjoerg case IPCP_OPT_ADDRESS: return "address"; 515325944Sjoerg } 515444145Sphk snprintf (buf, sizeof(buf), "ipcp/0x%x", opt); 515530300Sjoerg return buf; 515625944Sjoerg} 515725944Sjoerg 515878064Sume#ifdef INET6 515925944Sjoergstatic const char * 516078064Sumesppp_ipv6cp_opt_name(u_char opt) 516178064Sume{ 516278064Sume static char buf[12]; 516378064Sume switch (opt) { 516478064Sume case IPV6CP_OPT_IFID: return "ifid"; 516578064Sume case IPV6CP_OPT_COMPRESSION: return "compression"; 516678064Sume } 516778064Sume sprintf (buf, "0x%x", opt); 516878064Sume return buf; 516978064Sume} 517078064Sume#endif 517178064Sume 517278064Sumestatic const char * 517325944Sjoergsppp_state_name(int state) 517425944Sjoerg{ 517525944Sjoerg switch (state) { 517625944Sjoerg case STATE_INITIAL: return "initial"; 517725944Sjoerg case STATE_STARTING: return "starting"; 517825944Sjoerg case STATE_CLOSED: return "closed"; 517925944Sjoerg case STATE_STOPPED: return "stopped"; 518025944Sjoerg case STATE_CLOSING: return "closing"; 518125944Sjoerg case STATE_STOPPING: return "stopping"; 518225944Sjoerg case STATE_REQ_SENT: return "req-sent"; 518325944Sjoerg case STATE_ACK_RCVD: return "ack-rcvd"; 518425944Sjoerg case STATE_ACK_SENT: return "ack-sent"; 518525944Sjoerg case STATE_OPENED: return "opened"; 518625944Sjoerg } 518725944Sjoerg return "illegal"; 518825944Sjoerg} 518925944Sjoerg 519025944Sjoergstatic const char * 519125944Sjoergsppp_phase_name(enum ppp_phase phase) 519225944Sjoerg{ 519325944Sjoerg switch (phase) { 519425944Sjoerg case PHASE_DEAD: return "dead"; 519525944Sjoerg case PHASE_ESTABLISH: return "establish"; 519625944Sjoerg case PHASE_TERMINATE: return "terminate"; 519725944Sjoerg case PHASE_AUTHENTICATE: return "authenticate"; 519825944Sjoerg case PHASE_NETWORK: return "network"; 519925944Sjoerg } 520025944Sjoerg return "illegal"; 520125944Sjoerg} 520225944Sjoerg 520325944Sjoergstatic const char * 520425944Sjoergsppp_proto_name(u_short proto) 520525944Sjoerg{ 520625944Sjoerg static char buf[12]; 520725944Sjoerg switch (proto) { 520825944Sjoerg case PPP_LCP: return "lcp"; 520925944Sjoerg case PPP_IPCP: return "ipcp"; 521030300Sjoerg case PPP_PAP: return "pap"; 521130300Sjoerg case PPP_CHAP: return "chap"; 521278064Sume case PPP_IPV6CP: return "ipv6cp"; 521325944Sjoerg } 521444145Sphk snprintf(buf, sizeof(buf), "proto/0x%x", (unsigned)proto); 521525944Sjoerg return buf; 521625944Sjoerg} 521725944Sjoerg 521812820Sphkstatic void 521930300Sjoergsppp_print_bytes(const u_char *p, u_short len) 52204910Swollman{ 522144145Sphk if (len) 522269211Sphk log(-1, " %*D", len, p, "-"); 52234910Swollman} 522425944Sjoerg 522530300Sjoergstatic void 522630300Sjoergsppp_print_string(const char *p, u_short len) 522730300Sjoerg{ 522830300Sjoerg u_char c; 522930300Sjoerg 523030300Sjoerg while (len-- > 0) { 523130300Sjoerg c = *p++; 523230300Sjoerg /* 523330300Sjoerg * Print only ASCII chars directly. RFC 1994 recommends 523430300Sjoerg * using only them, but we don't rely on it. */ 523530300Sjoerg if (c < ' ' || c > '~') 523669211Sphk log(-1, "\\x%x", c); 523730300Sjoerg else 523869211Sphk log(-1, "%c", c); 523930300Sjoerg } 524030300Sjoerg} 524130300Sjoerg 524230300Sjoergstatic const char * 524330300Sjoergsppp_dotted_quad(u_long addr) 524430300Sjoerg{ 524530300Sjoerg static char s[16]; 524630300Sjoerg sprintf(s, "%d.%d.%d.%d", 524740008Sjoerg (int)((addr >> 24) & 0xff), 524840008Sjoerg (int)((addr >> 16) & 0xff), 524940008Sjoerg (int)((addr >> 8) & 0xff), 525038372Sbde (int)(addr & 0xff)); 525130300Sjoerg return s; 525230300Sjoerg} 525330300Sjoerg 525430300Sjoergstatic int 525530300Sjoergsppp_strnlen(u_char *p, int max) 525630300Sjoerg{ 525730300Sjoerg int len; 525830300Sjoerg 525930300Sjoerg for (len = 0; len < max && *p; ++p) 526030300Sjoerg ++len; 526130300Sjoerg return len; 526230300Sjoerg} 526330300Sjoerg 526430300Sjoerg/* a dummy, used to drop uninteresting events */ 526530300Sjoergstatic void 526630300Sjoergsppp_null(struct sppp *unused) 526730300Sjoerg{ 526830300Sjoerg /* do just nothing */ 526930300Sjoerg} 5270