2 * Synchronous PPP/Cisco link level subroutines.
3 * Keepalive protocol implemented in both Cisco and PPP modes.
5 * Copyright (C) 1994-1996 Cronyx Engineering Ltd.
6 * Author: Serge Vakulenko, <vak@cronyx.ru>
8 * Heavily revamped to conform to RFC 1661.
9 * Copyright (C) 1997, 2001 Joerg Wunsch.
11 * This software is distributed with NO WARRANTIES, not even the implied
12 * warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
14 * Authors grant any other persons or organisations permission to use
15 * or modify this software as long as this message is kept with the software,
16 * all derivative works or modified versions.
18 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997
20 * $FreeBSD: src/sys/net/if_spppsubr.c,v 1.59.2.13 2002/07/03 15:44:41 joerg Exp $
23 #include <sys/param.h>
24 #include <sys/libkern.h>
27 #include "opt_inet6.h"
29 #include <sys/systm.h>
30 #include <sys/kernel.h>
31 #include <sys/module.h>
32 #include <sys/sockio.h>
33 #include <sys/socket.h>
34 #include <sys/syslog.h>
35 #include <sys/random.h>
36 #include <sys/thread2.h>
37 #include <sys/malloc.h>
42 #include <net/ifq_var.h>
43 #include <net/netisr.h>
44 #include <net/if_types.h>
45 #include <net/route.h>
46 #include <netinet/in.h>
47 #include <netinet/in_systm.h>
48 #include <netinet/ip.h>
49 #include <net/slcompress.h>
51 #include <machine/stdarg.h>
53 #include <netinet/in_var.h>
56 #include <netinet/tcp.h>
59 #include <netinet/if_ether.h>
63 #define IOCTL_CMD_T u_long
64 #define MAXALIVECNT 3 /* max. alive packets */
67 * Interface flags that can be set in an ifconfig command.
69 * Setting link0 will make the link passive, i.e. it will be marked
70 * as being administrative openable, but won't be opened to begin
71 * with. Incoming calls will be answered, or subsequent calls with
72 * -link1 will cause the administrative open of the LCP layer.
74 * Setting link1 will cause the link to auto-dial only as packets
77 * Setting IFF_DEBUG will syslog the option negotiation and state
78 * transitions at level kern.debug. Note: all logs consistently look
81 * <if-name><unit>: <proto-name> <additional info...>
83 * with <if-name><unit> being something like "bppp0", and <proto-name>
84 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
87 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
88 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */
89 #define IFF_CISCO IFF_LINK2 /* auto-dial on output */
91 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
92 #define PPP_UI 0x03 /* Unnumbered Information */
93 #define PPP_IP 0x0021 /* Internet Protocol */
94 #define PPP_ISO 0x0023 /* ISO OSI Protocol */
95 #define PPP_XNS 0x0025 /* Xerox NS Protocol */
96 #define PPP_VJ_COMP 0x002d /* VJ compressed TCP/IP */
97 #define PPP_VJ_UCOMP 0x002f /* VJ uncompressed TCP/IP */
98 #define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */
99 #define PPP_LCP 0xc021 /* Link Control Protocol */
100 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
101 #define PPP_CHAP 0xc223 /* Challenge-Handshake Auth Protocol */
102 #define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */
103 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
105 #define CONF_REQ 1 /* PPP configure request */
106 #define CONF_ACK 2 /* PPP configure acknowledge */
107 #define CONF_NAK 3 /* PPP configure negative ack */
108 #define CONF_REJ 4 /* PPP configure reject */
109 #define TERM_REQ 5 /* PPP terminate request */
110 #define TERM_ACK 6 /* PPP terminate acknowledge */
111 #define CODE_REJ 7 /* PPP code reject */
112 #define PROTO_REJ 8 /* PPP protocol reject */
113 #define ECHO_REQ 9 /* PPP echo request */
114 #define ECHO_REPLY 10 /* PPP echo reply */
115 #define DISC_REQ 11 /* PPP discard request */
117 #define LCP_OPT_MRU 1 /* maximum receive unit */
118 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */
119 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */
120 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */
121 #define LCP_OPT_MAGIC 5 /* magic number */
122 #define LCP_OPT_RESERVED 6 /* reserved */
123 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */
124 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */
126 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */
127 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol (VJ) */
128 #define IPCP_OPT_ADDRESS 3 /* local IP address */
130 #define IPV6CP_OPT_IFID 1 /* interface identifier */
131 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */
133 #define IPCP_COMP_VJ 0x2d /* Code for VJ compression */
135 #define PAP_REQ 1 /* PAP name/password request */
136 #define PAP_ACK 2 /* PAP acknowledge */
137 #define PAP_NAK 3 /* PAP fail */
139 #define CHAP_CHALLENGE 1 /* CHAP challenge request */
140 #define CHAP_RESPONSE 2 /* CHAP challenge response */
141 #define CHAP_SUCCESS 3 /* CHAP response ok */
142 #define CHAP_FAILURE 4 /* CHAP response failed */
144 #define CHAP_MD5 5 /* hash algorithm - MD5 */
146 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */
147 #define CISCO_UNICAST 0x0f /* Cisco unicast address */
148 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
149 #define CISCO_ADDR_REQ 0 /* Cisco address request */
150 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */
151 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
153 /* states are named and numbered according to RFC 1661 */
154 #define STATE_INITIAL 0
155 #define STATE_STARTING 1
156 #define STATE_CLOSED 2
157 #define STATE_STOPPED 3
158 #define STATE_CLOSING 4
159 #define STATE_STOPPING 5
160 #define STATE_REQ_SENT 6
161 #define STATE_ACK_RCVD 7
162 #define STATE_ACK_SENT 8
163 #define STATE_OPENED 9
169 } __attribute__((__packed__));
170 #define PPP_HEADER_LEN sizeof (struct ppp_header)
176 } __attribute__((__packed__));
177 #define LCP_HEADER_LEN sizeof (struct lcp_header)
179 struct cisco_packet {
186 } __attribute__((__packed__));
187 #define CISCO_PACKET_LEN sizeof (struct cisco_packet)
190 * We follow the spelling and capitalization of RFC 1661 here, to make
191 * it easier comparing with the standard. Please refer to this RFC in
192 * case you can't make sense out of these abbreviation; it will also
193 * explain the semantics related to the various events and actions.
196 u_short proto; /* PPP control protocol number */
197 u_char protoidx; /* index into state table in struct sppp */
199 #define CP_LCP 0x01 /* this is the LCP */
200 #define CP_AUTH 0x02 /* this is an authentication protocol */
201 #define CP_NCP 0x04 /* this is a NCP */
202 #define CP_QUAL 0x08 /* this is a quality reporting protocol */
203 const char *name; /* name of this control protocol */
205 void (*Up)(struct sppp *sp);
206 void (*Down)(struct sppp *sp);
207 void (*Open)(struct sppp *sp);
208 void (*Close)(struct sppp *sp);
209 void (*TO)(void *sp);
210 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len);
211 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len);
212 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len);
214 void (*tlu)(struct sppp *sp);
215 void (*tld)(struct sppp *sp);
216 void (*tls)(struct sppp *sp);
217 void (*tlf)(struct sppp *sp);
218 void (*scr)(struct sppp *sp);
221 static struct sppp *spppq;
222 static struct callout keepalive_timeout;
224 #define SPP_FMT "%s: "
225 #define SPP_ARGS(ifp) (ifp)->if_xname
229 * The following disgusting hack gets around the problem that IP TOS
230 * can't be set yet. We want to put "interactive" traffic on a high
231 * priority queue. To decide if traffic is interactive, we check that
232 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
234 * XXX is this really still necessary? - joerg -
236 static u_short interactive_ports[8] = {
240 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
243 /* almost every function needs these */
245 struct ifnet *ifp = &sp->pp_if; \
246 int debug = ifp->if_flags & IFF_DEBUG
248 static int sppp_output(struct ifnet *ifp, struct mbuf *m,
249 struct sockaddr *dst, struct rtentry *rt);
251 static void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2);
252 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m);
254 static void sppp_cp_input(const struct cp *cp, struct sppp *sp,
256 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
257 u_char ident, u_short len, void *data);
258 /* static void sppp_cp_timeout(void *arg); */
259 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp,
261 static void sppp_auth_send(const struct cp *cp,
262 struct sppp *sp, unsigned int type, unsigned int id,
265 static void sppp_up_event(const struct cp *cp, struct sppp *sp);
266 static void sppp_down_event(const struct cp *cp, struct sppp *sp);
267 static void sppp_open_event(const struct cp *cp, struct sppp *sp);
268 static void sppp_close_event(const struct cp *cp, struct sppp *sp);
269 static void sppp_to_event(const struct cp *cp, struct sppp *sp);
271 static void sppp_null(struct sppp *sp);
273 static void sppp_lcp_init(struct sppp *sp);
274 static void sppp_lcp_up(struct sppp *sp);
275 static void sppp_lcp_down(struct sppp *sp);
276 static void sppp_lcp_open(struct sppp *sp);
277 static void sppp_lcp_close(struct sppp *sp);
278 static void sppp_lcp_TO(void *sp);
279 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
280 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
281 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
282 static void sppp_lcp_tlu(struct sppp *sp);
283 static void sppp_lcp_tld(struct sppp *sp);
284 static void sppp_lcp_tls(struct sppp *sp);
285 static void sppp_lcp_tlf(struct sppp *sp);
286 static void sppp_lcp_scr(struct sppp *sp);
287 static void sppp_lcp_check_and_close(struct sppp *sp);
288 static int sppp_ncp_check(struct sppp *sp);
290 static void sppp_ipcp_init(struct sppp *sp);
291 static void sppp_ipcp_up(struct sppp *sp);
292 static void sppp_ipcp_down(struct sppp *sp);
293 static void sppp_ipcp_open(struct sppp *sp);
294 static void sppp_ipcp_close(struct sppp *sp);
295 static void sppp_ipcp_TO(void *sp);
296 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
297 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
298 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
299 static void sppp_ipcp_tlu(struct sppp *sp);
300 static void sppp_ipcp_tld(struct sppp *sp);
301 static void sppp_ipcp_tls(struct sppp *sp);
302 static void sppp_ipcp_tlf(struct sppp *sp);
303 static void sppp_ipcp_scr(struct sppp *sp);
305 static void sppp_ipv6cp_init(struct sppp *sp);
306 static void sppp_ipv6cp_up(struct sppp *sp);
307 static void sppp_ipv6cp_down(struct sppp *sp);
308 static void sppp_ipv6cp_open(struct sppp *sp);
309 static void sppp_ipv6cp_close(struct sppp *sp);
310 static void sppp_ipv6cp_TO(void *sp);
311 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len);
312 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
313 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
314 static void sppp_ipv6cp_tlu(struct sppp *sp);
315 static void sppp_ipv6cp_tld(struct sppp *sp);
316 static void sppp_ipv6cp_tls(struct sppp *sp);
317 static void sppp_ipv6cp_tlf(struct sppp *sp);
318 static void sppp_ipv6cp_scr(struct sppp *sp);
320 static void sppp_pap_input(struct sppp *sp, struct mbuf *m);
321 static void sppp_pap_init(struct sppp *sp);
322 static void sppp_pap_open(struct sppp *sp);
323 static void sppp_pap_close(struct sppp *sp);
324 static void sppp_pap_TO(void *sp);
325 static void sppp_pap_my_TO(void *sp);
326 static void sppp_pap_tlu(struct sppp *sp);
327 static void sppp_pap_tld(struct sppp *sp);
328 static void sppp_pap_scr(struct sppp *sp);
330 static void sppp_chap_input(struct sppp *sp, struct mbuf *m);
331 static void sppp_chap_init(struct sppp *sp);
332 static void sppp_chap_open(struct sppp *sp);
333 static void sppp_chap_close(struct sppp *sp);
334 static void sppp_chap_TO(void *sp);
335 static void sppp_chap_tlu(struct sppp *sp);
336 static void sppp_chap_tld(struct sppp *sp);
337 static void sppp_chap_scr(struct sppp *sp);
339 static const char *sppp_auth_type_name(u_short proto, u_char type);
340 static const char *sppp_cp_type_name(u_char type);
341 static const char *sppp_dotted_quad(u_long addr);
342 static const char *sppp_ipcp_opt_name(u_char opt);
344 static const char *sppp_ipv6cp_opt_name(u_char opt);
346 static const char *sppp_lcp_opt_name(u_char opt);
347 static const char *sppp_phase_name(enum ppp_phase phase);
348 static const char *sppp_proto_name(u_short proto);
349 static const char *sppp_state_name(int state);
350 static int sppp_params(struct sppp *sp, u_long cmd, void *data);
351 static int sppp_strnlen(u_char *p, int max);
352 static void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst,
354 static void sppp_keepalive(void *dummy);
355 static void sppp_phase_network(struct sppp *sp);
356 static void sppp_print_bytes(const u_char *p, u_short len);
357 static void sppp_print_string(const char *p, u_short len);
358 static void sppp_set_ip_addr(struct sppp *sp, u_long src);
360 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src,
361 struct in6_addr *dst, struct in6_addr *srcmask);
362 #ifdef IPV6CP_MYIFID_DYN
363 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src);
364 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src);
366 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src);
369 /* our control protocol descriptors */
370 static const struct cp lcp = {
371 PPP_LCP, IDX_LCP, CP_LCP, "lcp",
372 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close,
373 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak,
374 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf,
378 static const struct cp ipcp = {
379 PPP_IPCP, IDX_IPCP, CP_NCP, "ipcp",
380 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close,
381 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak,
382 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf,
386 static const struct cp ipv6cp = {
387 PPP_IPV6CP, IDX_IPV6CP,
388 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/
394 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close,
395 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak,
396 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf,
400 static const struct cp pap = {
401 PPP_PAP, IDX_PAP, CP_AUTH, "pap",
402 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close,
403 sppp_pap_TO, 0, 0, 0,
404 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null,
408 static const struct cp chap = {
409 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap",
410 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close,
411 sppp_chap_TO, 0, 0, 0,
412 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null,
416 static const struct cp *cps[IDX_COUNT] = {
418 &ipcp, /* IDX_IPCP */
419 &ipv6cp, /* IDX_IPV6CP */
421 &chap, /* IDX_CHAP */
425 sppp_modevent(module_t mod, int type, void *unused)
429 callout_init(&keepalive_timeout);
439 static moduledata_t spppmod = {
444 MODULE_VERSION(sppp, 1);
445 DECLARE_MODULE(sppp, spppmod, SI_SUB_DRIVERS, SI_ORDER_ANY);
448 * Exported functions, comprising our interface to the lower layer.
452 * Process the received packet.
455 sppp_input(struct ifnet *ifp, struct mbuf *m)
457 struct ppp_header *h;
459 struct sppp *sp = (struct sppp *)ifp;
461 int hlen, vjlen, do_account = 0;
462 int debug = ifp->if_flags & IFF_DEBUG;
464 if (ifp->if_flags & IFF_UP)
465 /* Count received bytes, add FCS and one flag */
466 IFNET_STAT_INC(ifp, ibytes, m->m_pkthdr.len + 3);
468 if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
469 /* Too small packet, drop it. */
472 SPP_FMT "input packet is too small, %d bytes\n",
473 SPP_ARGS(ifp), m->m_pkthdr.len);
477 IFNET_STAT_INC(ifp, ierrors, 1);
478 IFNET_STAT_INC(ifp, iqdrops, 1);
482 /* Get PPP header. */
483 h = mtod (m, struct ppp_header*);
484 m_adj (m, PPP_HEADER_LEN);
486 switch (h->address) {
487 case PPP_ALLSTATIONS:
488 if (h->control != PPP_UI)
490 if (sp->pp_mode == IFF_CISCO) {
493 SPP_FMT "PPP packet in Cisco mode "
494 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
496 h->address, h->control, ntohs(h->protocol));
499 switch (ntohs (h->protocol)) {
503 SPP_FMT "rejecting protocol "
504 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
506 h->address, h->control, ntohs(h->protocol));
507 if (sp->state[IDX_LCP] == STATE_OPENED)
508 sppp_cp_send (sp, PPP_LCP, PROTO_REJ,
509 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2,
511 IFNET_STAT_INC(ifp, noproto, 1);
514 sppp_cp_input(&lcp, sp, m);
518 if (sp->pp_phase >= PHASE_AUTHENTICATE)
519 sppp_pap_input(sp, m);
523 if (sp->pp_phase >= PHASE_AUTHENTICATE)
524 sppp_chap_input(sp, m);
529 if (sp->pp_phase == PHASE_NETWORK)
530 sppp_cp_input(&ipcp, sp, m);
534 if (sp->state[IDX_IPCP] == STATE_OPENED) {
540 if (sp->state[IDX_IPCP] == STATE_OPENED) {
542 sl_uncompress_tcp_core(mtod(m, u_char *),
546 &iphdr, &hlen)) <= 0) {
549 SPP_FMT "VJ uncompress failed on compressed packet\n",
555 * Trim the VJ header off the packet, and prepend
556 * the uncompressed IP header (which will usually
557 * end up in two chained mbufs since there's not
558 * enough leading space in the existing mbuf).
561 M_PREPEND(m, hlen, MB_DONTWAIT);
564 bcopy(iphdr, mtod(m, u_char *), hlen);
571 if (sp->state[IDX_IPCP] == STATE_OPENED) {
572 if (sl_uncompress_tcp_core(mtod(m, u_char *),
574 TYPE_UNCOMPRESSED_TCP,
576 &iphdr, &hlen) != 0) {
579 SPP_FMT "VJ uncompress failed on uncompressed packet\n",
590 if (sp->pp_phase == PHASE_NETWORK)
591 sppp_cp_input(&ipv6cp, sp, m);
596 if (sp->state[IDX_IPV6CP] == STATE_OPENED) {
604 case CISCO_MULTICAST:
606 /* Don't check the control field here (RFC 1547). */
607 if (sp->pp_mode != IFF_CISCO) {
610 SPP_FMT "Cisco packet in PPP mode "
611 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
613 h->address, h->control, ntohs(h->protocol));
616 switch (ntohs (h->protocol)) {
618 IFNET_STAT_INC(ifp, noproto, 1);
620 case CISCO_KEEPALIVE:
621 sppp_cisco_input ((struct sppp*) ifp, m);
638 default: /* Invalid PPP packet. */
642 SPP_FMT "invalid input packet "
643 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
645 h->address, h->control, ntohs(h->protocol));
649 if (! (ifp->if_flags & IFF_UP) || isr < 0)
654 netisr_queue(isr, m);
657 * Do only account for network packets, not for control
658 * packets. This is used by some subsystems to detect
662 sp->pp_last_recv = time_uptime;
666 * Enqueue transmit packet.
669 sppp_output_serialized(struct ifnet *ifp, struct ifaltq_subque *ifsq,
670 struct mbuf *m, struct sockaddr *dst, struct rtentry *rt)
672 struct sppp *sp = (struct sppp*) ifp;
673 struct ppp_header *h;
674 struct ifqueue *ifq = NULL;
676 int ipproto = PPP_IP;
677 int debug = ifp->if_flags & IFF_DEBUG;
678 struct altq_pktattr pktattr;
682 if ((ifp->if_flags & IFF_UP) == 0 ||
683 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) {
692 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) {
697 * Hack to prevent the initialization-time generated
698 * IPv6 multicast packet to erroneously cause a
699 * dialout event in case IPv6 has been
700 * administratively disabled on that interface.
702 if (dst->sa_family == AF_INET6 &&
703 !(sp->confflags & CONF_ENABLE_IPV6))
707 * Interface is not yet running, but auto-dial. Need
708 * to start LCP for it.
710 ifp->if_flags |= IFF_RUNNING;
717 * if the queueing discipline needs packet classification,
718 * do it before prepending link headers.
720 ifq_classify(&ifp->if_snd, m, dst->sa_family, &pktattr);
723 if (dst->sa_family == AF_INET) {
724 /* XXX Check mbuf length here? */
725 struct ip *ip = mtod (m, struct ip*);
726 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
729 * When using dynamic local IP address assignment by using
730 * 0.0.0.0 as a local address, the first TCP session will
731 * not connect because the local TCP checksum is computed
732 * using 0.0.0.0 which will later become our real IP address
733 * so the TCP checksum computed at the remote end will
734 * become invalid. So we
735 * - don't let packets with src ip addr 0 thru
736 * - we flag TCP packets with src ip 0 as an error
739 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */
743 if(ip->ip_p == IPPROTO_TCP)
744 return(EADDRNOTAVAIL);
750 * Put low delay, telnet, rlogin and ftp control packets
751 * in front of the queue.
753 if (IF_QFULL (&sp->pp_fastq))
755 else if (ip->ip_tos & IPTOS_LOWDELAY)
757 else if (m->m_len < sizeof *ip + sizeof *tcp)
759 else if (ip->ip_p != IPPROTO_TCP)
761 else if (INTERACTIVE (ntohs (tcp->th_sport)))
763 else if (INTERACTIVE (ntohs (tcp->th_dport)))
767 * Do IP Header compression
769 if (sp->pp_mode != IFF_CISCO && (sp->ipcp.flags & IPCP_VJ) &&
770 ip->ip_p == IPPROTO_TCP)
771 switch (sl_compress_tcp(m, ip, sp->pp_comp,
772 sp->ipcp.compress_cid)) {
773 case TYPE_COMPRESSED_TCP:
774 ipproto = PPP_VJ_COMP;
776 case TYPE_UNCOMPRESSED_TCP:
777 ipproto = PPP_VJ_UCOMP;
791 if (dst->sa_family == AF_INET6) {
792 /* XXX do something tricky here? */
797 * Prepend general data packet PPP header. For now, IP only.
799 M_PREPEND (m, PPP_HEADER_LEN, MB_DONTWAIT);
802 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
804 IFNET_STAT_INC(ifp, oerrors, 1);
809 * May want to check size of packet
810 * (albeit due to the implementation it's always enough)
812 h = mtod (m, struct ppp_header*);
813 if (sp->pp_mode == IFF_CISCO) {
814 h->address = CISCO_UNICAST; /* unicast address */
817 h->address = PPP_ALLSTATIONS; /* broadcast address */
818 h->control = PPP_UI; /* Unnumbered Info */
821 switch (dst->sa_family) {
823 case AF_INET: /* Internet Protocol */
824 if (sp->pp_mode == IFF_CISCO)
825 h->protocol = htons (ETHERTYPE_IP);
828 * Don't choke with an ENETDOWN early. It's
829 * possible that we just started dialing out,
830 * so don't drop the packet immediately. If
831 * we notice that we run out of buffer space
832 * below, we will however remember that we are
833 * not ready to carry IP packets, and return
834 * ENETDOWN, as opposed to ENOBUFS.
836 h->protocol = htons(ipproto);
837 if (sp->state[IDX_IPCP] != STATE_OPENED)
843 case AF_INET6: /* Internet Protocol */
844 if (sp->pp_mode == IFF_CISCO)
845 h->protocol = htons (ETHERTYPE_IPV6);
848 * Don't choke with an ENETDOWN early. It's
849 * possible that we just started dialing out,
850 * so don't drop the packet immediately. If
851 * we notice that we run out of buffer space
852 * below, we will however remember that we are
853 * not ready to carry IP packets, and return
854 * ENETDOWN, as opposed to ENOBUFS.
856 h->protocol = htons(PPP_IPV6);
857 if (sp->state[IDX_IPV6CP] != STATE_OPENED)
864 IFNET_STAT_INC(ifp, oerrors, 1);
866 return (EAFNOSUPPORT);
870 * Queue message on interface, and start output if interface
883 rv = ifsq_enqueue(ifsq, m, &pktattr);
886 IFNET_STAT_INC(ifp, oerrors, 1);
890 if (!ifsq_is_oactive(ifsq))
891 (*ifp->if_start) (ifp, ifsq);
894 * Count output packets and bytes.
895 * The packet length includes header, FCS and 1 flag,
896 * according to RFC 1333.
898 IFNET_STAT_INC(ifp, obytes, m->m_pkthdr.len + 3);
901 * Unlike in sppp_input(), we can always bump the timestamp
902 * here since sppp_output() is only called on behalf of
903 * network-layer traffic; control-layer traffic is handled
906 sp->pp_last_sent = time_uptime;
913 sppp_output(struct ifnet *ifp, struct mbuf *m,
914 struct sockaddr *dst, struct rtentry *rt)
916 struct ifaltq_subque *ifsq = ifq_get_subq_default(&ifp->if_snd);
919 ifsq_serialize_hw(ifsq);
920 error = sppp_output_serialized(ifp, ifsq, m, dst, rt);
921 ifsq_deserialize_hw(ifsq);
927 sppp_attach(struct ifnet *ifp)
929 struct sppp *sp = (struct sppp*) ifp;
931 /* Initialize keepalive handler. */
933 callout_reset(&keepalive_timeout, hz * 10,
934 sppp_keepalive, NULL);
936 /* Insert new entry into the keepalive list. */
940 sp->pp_if.if_mtu = PP_MTU;
941 sp->pp_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
942 sp->pp_if.if_type = IFT_PPP;
943 sp->pp_if.if_output = sppp_output;
945 sp->pp_flags = PP_KEEPALIVE;
947 ifq_set_maxlen(&sp->pp_if.if_snd, 32);
948 sp->pp_fastq.ifq_maxlen = 32;
949 sp->pp_cpq.ifq_maxlen = 20;
952 bzero(&sp->pp_seq[0], sizeof(sp->pp_seq));
953 bzero(&sp->pp_rseq[0], sizeof(sp->pp_rseq));
954 sp->pp_phase = PHASE_DEAD;
956 sp->pp_down = lcp.Down;
957 sp->pp_last_recv = sp->pp_last_sent = time_uptime;
960 sp->confflags |= CONF_ENABLE_VJ;
963 sp->confflags |= CONF_ENABLE_IPV6;
965 sp->pp_comp = kmalloc(sizeof(struct slcompress), M_TEMP, M_WAITOK);
966 sl_compress_init(sp->pp_comp, -1);
969 sppp_ipv6cp_init(sp);
975 sppp_detach(struct ifnet *ifp)
977 struct sppp **q, *p, *sp = (struct sppp*) ifp;
980 /* Remove the entry from the keepalive list. */
981 for (q = &spppq; (p = *q); q = &p->pp_next)
987 /* Stop keepalive handler. */
989 callout_stop(&keepalive_timeout);
991 for (i = 0; i < IDX_COUNT; i++)
992 callout_stop(&sp->timeout[i]);
993 callout_stop(&sp->pap_my_to);
997 * Flush the interface output queue.
1000 sppp_flush(struct ifnet *ifp)
1002 struct sppp *sp = (struct sppp*) ifp;
1004 ifq_purge_all(&sp->pp_if.if_snd);
1005 IF_DRAIN(&sp->pp_fastq);
1006 IF_DRAIN(&sp->pp_cpq);
1010 * Check if the output queue is empty.
1013 sppp_isempty(struct ifnet *ifp)
1015 struct sppp *sp = (struct sppp*) ifp;
1019 empty = IF_QEMPTY(&sp->pp_fastq) && IF_QEMPTY(&sp->pp_cpq) &&
1020 ifsq_is_empty(ifq_get_subq_default(&sp->pp_if.if_snd));
1026 * Get next packet to send.
1029 sppp_dequeue(struct ifnet *ifp)
1031 struct sppp *sp = (struct sppp*) ifp;
1037 * Process only the control protocol queue until we have at
1038 * least one NCP open.
1040 * Do always serve all three queues in Cisco mode.
1042 IF_DEQUEUE(&sp->pp_cpq, m);
1044 (sppp_ncp_check(sp) || sp->pp_mode == IFF_CISCO)) {
1045 IF_DEQUEUE(&sp->pp_fastq, m);
1048 ifq_get_subq_default(&sp->pp_if.if_snd));
1057 * Pick the next packet, do not remove it from the queue.
1060 sppp_pick(struct ifnet *ifp)
1062 struct sppp *sp = (struct sppp*)ifp;
1067 m = sp->pp_cpq.ifq_head;
1069 (sp->pp_phase == PHASE_NETWORK || sp->pp_mode == IFF_CISCO)) {
1070 if ((m = sp->pp_fastq.ifq_head) == NULL)
1071 m = ifsq_poll(ifq_get_subq_default(&sp->pp_if.if_snd));
1079 * Process an ioctl request. Called on low priority level.
1082 sppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
1084 struct ifreq *ifr = (struct ifreq*) data;
1085 struct sppp *sp = (struct sppp*) ifp;
1086 int rv, going_up, going_down, newmode;
1093 case SIOCSIFDSTADDR:
1097 /* set the interface "up" when assigning an IP address */
1098 ifp->if_flags |= IFF_UP;
1099 /* fall through... */
1102 going_up = ifp->if_flags & IFF_UP &&
1103 (ifp->if_flags & IFF_RUNNING) == 0;
1104 going_down = (ifp->if_flags & IFF_UP) == 0 &&
1105 ifp->if_flags & IFF_RUNNING;
1107 newmode = ifp->if_flags & IFF_PASSIVE;
1109 newmode = ifp->if_flags & IFF_AUTO;
1111 newmode = ifp->if_flags & IFF_CISCO;
1112 ifp->if_flags &= ~(IFF_PASSIVE | IFF_AUTO | IFF_CISCO);
1113 ifp->if_flags |= newmode;
1115 if (newmode != sp->pp_mode) {
1118 going_up = ifp->if_flags & IFF_RUNNING;
1122 if (sp->pp_mode != IFF_CISCO)
1124 else if (sp->pp_tlf)
1127 ifp->if_flags &= ~IFF_RUNNING;
1128 sp->pp_mode = newmode;
1132 if (sp->pp_mode != IFF_CISCO)
1134 sp->pp_mode = newmode;
1135 if (sp->pp_mode == 0) {
1136 ifp->if_flags |= IFF_RUNNING;
1139 if (sp->pp_mode == IFF_CISCO) {
1142 ifp->if_flags |= IFF_RUNNING;
1150 #define ifr_mtu ifr_metric
1153 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru) {
1157 ifp->if_mtu = ifr->ifr_mtu;
1162 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru) {
1166 ifp->if_mtu = *(short*)data;
1171 ifr->ifr_mtu = ifp->if_mtu;
1176 *(short*)data = ifp->if_mtu;
1183 case SIOCGIFGENERIC:
1184 case SIOCSIFGENERIC:
1185 rv = sppp_params(sp, cmd, data);
1197 * Cisco framing implementation.
1201 * Handle incoming Cisco keepalive protocol packets.
1204 sppp_cisco_input(struct sppp *sp, struct mbuf *m)
1207 struct cisco_packet *h;
1210 if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
1213 SPP_FMT "cisco invalid packet length: %d bytes\n",
1214 SPP_ARGS(ifp), m->m_pkthdr.len);
1217 h = mtod (m, struct cisco_packet*);
1220 SPP_FMT "cisco input: %d bytes "
1221 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1222 SPP_ARGS(ifp), m->m_pkthdr.len,
1223 (u_long)ntohl (h->type), h->par1, h->par2, (u_int)h->rel,
1224 (u_int)h->time0, (u_int)h->time1);
1225 switch (ntohl (h->type)) {
1228 log(-1, SPP_FMT "cisco unknown packet type: 0x%lx\n",
1229 SPP_ARGS(ifp), (u_long)ntohl (h->type));
1231 case CISCO_ADDR_REPLY:
1232 /* Reply on address request, ignore */
1234 case CISCO_KEEPALIVE_REQ:
1235 sp->pp_alivecnt = 0;
1236 sp->pp_rseq[IDX_LCP] = ntohl (h->par1);
1237 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) {
1238 /* Local and remote sequence numbers are equal.
1239 * Probably, the line is in loopback mode. */
1240 if (sp->pp_loopcnt >= MAXALIVECNT) {
1241 kprintf (SPP_FMT "loopback\n",
1244 if (ifp->if_flags & IFF_UP) {
1246 IF_DRAIN(&sp->pp_cpq);
1251 /* Generate new local sequence number */
1252 sp->pp_seq[IDX_LCP] = krandom();
1256 if (! (ifp->if_flags & IFF_UP) &&
1257 (ifp->if_flags & IFF_RUNNING)) {
1259 kprintf (SPP_FMT "up\n", SPP_ARGS(ifp));
1262 case CISCO_ADDR_REQ:
1263 sppp_get_ip_addrs(sp, &me, 0, &mymask);
1265 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
1271 * Send Cisco keepalive packet.
1274 sppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
1277 struct ppp_header *h;
1278 struct cisco_packet *ch;
1281 struct ifaltq_subque *ifsq;
1283 getmicrouptime(&tv);
1285 MGETHDR (m, MB_DONTWAIT, MT_DATA);
1288 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
1289 m->m_pkthdr.rcvif = 0;
1291 h = mtod (m, struct ppp_header*);
1292 h->address = CISCO_MULTICAST;
1294 h->protocol = htons (CISCO_KEEPALIVE);
1296 ch = (struct cisco_packet*) (h + 1);
1297 ch->type = htonl (type);
1298 ch->par1 = htonl (par1);
1299 ch->par2 = htonl (par2);
1302 ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
1303 ch->time1 = htons ((u_short) tv.tv_sec);
1307 SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1308 SPP_ARGS(ifp), (u_long)ntohl (ch->type), ch->par1,
1309 ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
1311 if (IF_QFULL (&sp->pp_cpq)) {
1312 IF_DROP (&sp->pp_fastq);
1315 IF_ENQUEUE (&sp->pp_cpq, m);
1316 ifsq = ifq_get_subq_default(&ifp->if_snd);
1317 if (!ifsq_is_oactive(ifsq))
1318 (*ifp->if_start) (ifp, ifsq);
1319 IFNET_STAT_INC(ifp, obytes, m->m_pkthdr.len + 3);
1323 * PPP protocol implementation.
1327 * Send PPP control protocol packet.
1330 sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
1331 u_char ident, u_short len, void *data)
1334 struct ppp_header *h;
1335 struct lcp_header *lh;
1337 struct ifaltq_subque *ifsq;
1339 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
1340 len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
1341 MGETHDR (m, MB_DONTWAIT, MT_DATA);
1344 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
1345 m->m_pkthdr.rcvif = 0;
1347 h = mtod (m, struct ppp_header*);
1348 h->address = PPP_ALLSTATIONS; /* broadcast address */
1349 h->control = PPP_UI; /* Unnumbered Info */
1350 h->protocol = htons (proto); /* Link Control Protocol */
1352 lh = (struct lcp_header*) (h + 1);
1355 lh->len = htons (LCP_HEADER_LEN + len);
1357 bcopy (data, lh+1, len);
1360 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
1362 sppp_proto_name(proto),
1363 sppp_cp_type_name (lh->type), lh->ident,
1365 sppp_print_bytes ((u_char*) (lh+1), len);
1368 if (IF_QFULL (&sp->pp_cpq)) {
1369 IF_DROP (&sp->pp_fastq);
1371 IFNET_STAT_INC(ifp, oerrors, 1);
1373 IF_ENQUEUE (&sp->pp_cpq, m);
1374 ifsq = ifq_get_subq_default(&ifp->if_snd);
1375 if (!ifsq_is_oactive(ifsq))
1376 (*ifp->if_start) (ifp, ifsq);
1377 IFNET_STAT_INC(ifp, obytes, m->m_pkthdr.len + 3);
1381 * Handle incoming PPP control protocol packets.
1384 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
1387 struct lcp_header *h;
1388 int printlen, len = m->m_pkthdr.len;
1395 SPP_FMT "%s invalid packet length: %d bytes\n",
1396 SPP_ARGS(ifp), cp->name, len);
1399 h = mtod (m, struct lcp_header*);
1401 printlen = ntohs(h->len);
1403 SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
1404 SPP_ARGS(ifp), cp->name,
1405 sppp_state_name(sp->state[cp->protoidx]),
1406 sppp_cp_type_name (h->type), h->ident, printlen);
1410 sppp_print_bytes ((u_char*) (h+1), printlen - 4);
1413 if (len > ntohs (h->len))
1414 len = ntohs (h->len);
1415 p = (u_char *)(h + 1);
1420 log(-1, SPP_FMT "%s invalid conf-req length %d\n",
1421 SPP_ARGS(ifp), cp->name,
1423 IFNET_STAT_INC(ifp, ierrors, 1);
1426 /* handle states where RCR doesn't get a SCA/SCN */
1427 switch (sp->state[cp->protoidx]) {
1429 case STATE_STOPPING:
1432 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
1436 rv = (cp->RCR)(sp, h, len);
1438 /* fatal error, shut down */
1443 switch (sp->state[cp->protoidx]) {
1447 /* fall through... */
1448 case STATE_ACK_SENT:
1449 case STATE_REQ_SENT:
1451 * sppp_cp_change_state() have the side effect of
1452 * restarting the timeouts. We want to avoid that
1453 * if the state don't change, otherwise we won't
1454 * ever timeout and resend a configuration request
1457 if (sp->state[cp->protoidx] == (rv ? STATE_ACK_SENT:
1460 sppp_cp_change_state(cp, sp, rv?
1461 STATE_ACK_SENT: STATE_REQ_SENT);
1464 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1466 sppp_cp_change_state(cp, sp, rv?
1467 STATE_ACK_SENT: STATE_REQ_SENT);
1469 case STATE_ACK_RCVD:
1471 sppp_cp_change_state(cp, sp, STATE_OPENED);
1473 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1478 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1481 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1482 SPP_ARGS(ifp), cp->name,
1483 sppp_cp_type_name(h->type),
1484 sppp_state_name(sp->state[cp->protoidx]));
1485 IFNET_STAT_INC(ifp, ierrors, 1);
1489 if (h->ident != sp->confid[cp->protoidx]) {
1491 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1492 SPP_ARGS(ifp), cp->name,
1493 h->ident, sp->confid[cp->protoidx]);
1494 IFNET_STAT_INC(ifp, ierrors, 1);
1497 switch (sp->state[cp->protoidx]) {
1500 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1503 case STATE_STOPPING:
1505 case STATE_REQ_SENT:
1506 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1507 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1512 case STATE_ACK_RCVD:
1514 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1516 case STATE_ACK_SENT:
1517 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1518 sppp_cp_change_state(cp, sp, STATE_OPENED);
1520 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1521 SPP_ARGS(ifp), cp->name);
1525 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1526 SPP_ARGS(ifp), cp->name,
1527 sppp_cp_type_name(h->type),
1528 sppp_state_name(sp->state[cp->protoidx]));
1529 IFNET_STAT_INC(ifp, ierrors, 1);
1534 if (h->ident != sp->confid[cp->protoidx]) {
1536 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1537 SPP_ARGS(ifp), cp->name,
1538 h->ident, sp->confid[cp->protoidx]);
1539 IFNET_STAT_INC(ifp, ierrors, 1);
1542 if (h->type == CONF_NAK)
1543 (cp->RCN_nak)(sp, h, len);
1545 (cp->RCN_rej)(sp, h, len);
1547 switch (sp->state[cp->protoidx]) {
1550 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1552 case STATE_REQ_SENT:
1553 case STATE_ACK_SENT:
1554 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1556 * Slow things down a bit if we think we might be
1557 * in loopback. Depend on the timeout to send the
1558 * next configuration request.
1567 case STATE_ACK_RCVD:
1568 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1572 case STATE_STOPPING:
1575 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1576 SPP_ARGS(ifp), cp->name,
1577 sppp_cp_type_name(h->type),
1578 sppp_state_name(sp->state[cp->protoidx]));
1579 IFNET_STAT_INC(ifp, ierrors, 1);
1584 switch (sp->state[cp->protoidx]) {
1585 case STATE_ACK_RCVD:
1586 case STATE_ACK_SENT:
1587 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1592 case STATE_STOPPING:
1593 case STATE_REQ_SENT:
1595 /* Send Terminate-Ack packet. */
1597 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
1598 SPP_ARGS(ifp), cp->name);
1599 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1603 sp->rst_counter[cp->protoidx] = 0;
1604 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1608 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1609 SPP_ARGS(ifp), cp->name,
1610 sppp_cp_type_name(h->type),
1611 sppp_state_name(sp->state[cp->protoidx]));
1612 IFNET_STAT_INC(ifp, ierrors, 1);
1616 switch (sp->state[cp->protoidx]) {
1619 case STATE_REQ_SENT:
1620 case STATE_ACK_SENT:
1623 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1626 case STATE_STOPPING:
1627 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1630 case STATE_ACK_RCVD:
1631 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1636 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1639 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1640 SPP_ARGS(ifp), cp->name,
1641 sppp_cp_type_name(h->type),
1642 sppp_state_name(sp->state[cp->protoidx]));
1643 IFNET_STAT_INC(ifp, ierrors, 1);
1647 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1649 SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
1650 "danger will robinson\n",
1651 SPP_ARGS(ifp), cp->name,
1652 sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
1653 switch (sp->state[cp->protoidx]) {
1656 case STATE_REQ_SENT:
1657 case STATE_ACK_SENT:
1659 case STATE_STOPPING:
1662 case STATE_ACK_RCVD:
1663 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1666 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1667 SPP_ARGS(ifp), cp->name,
1668 sppp_cp_type_name(h->type),
1669 sppp_state_name(sp->state[cp->protoidx]));
1670 IFNET_STAT_INC(ifp, ierrors, 1);
1676 const struct cp *upper;
1682 proto = ntohs(*((u_int16_t *)p));
1683 for (i = 0; i < IDX_COUNT; i++) {
1684 if (cps[i]->proto == proto) {
1692 if (catastrophic || debug)
1693 log(catastrophic? LOG_INFO: LOG_DEBUG,
1694 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n",
1695 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+',
1696 sppp_cp_type_name(h->type), proto,
1697 upper ? upper->name : "unknown",
1698 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?");
1701 * if we got RXJ+ against conf-req, the peer does not implement
1702 * this particular protocol type. terminate the protocol.
1704 if (upper && !catastrophic) {
1705 if (sp->state[upper->protoidx] == STATE_REQ_SENT) {
1711 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1712 switch (sp->state[cp->protoidx]) {
1715 case STATE_REQ_SENT:
1716 case STATE_ACK_SENT:
1718 case STATE_STOPPING:
1721 case STATE_ACK_RCVD:
1722 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1725 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1726 SPP_ARGS(ifp), cp->name,
1727 sppp_cp_type_name(h->type),
1728 sppp_state_name(sp->state[cp->protoidx]));
1729 IFNET_STAT_INC(ifp, ierrors, 1);
1734 if (cp->proto != PPP_LCP)
1736 /* Discard the packet. */
1739 if (cp->proto != PPP_LCP)
1741 if (sp->state[cp->protoidx] != STATE_OPENED) {
1743 log(-1, SPP_FMT "lcp echo req but lcp closed\n",
1745 IFNET_STAT_INC(ifp, ierrors, 1);
1750 log(-1, SPP_FMT "invalid lcp echo request "
1751 "packet length: %d bytes\n",
1752 SPP_ARGS(ifp), len);
1755 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
1756 ntohl (*(long*)(h+1)) == sp->lcp.magic) {
1757 /* Line loopback mode detected. */
1758 kprintf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
1759 sp->pp_loopcnt = MAXALIVECNT * 5;
1761 IF_DRAIN(&sp->pp_cpq);
1763 /* Shut down the PPP link. */
1769 *(long*)(h+1) = htonl (sp->lcp.magic);
1771 log(-1, SPP_FMT "got lcp echo req, sending echo rep\n",
1773 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
1776 if (cp->proto != PPP_LCP)
1778 if (h->ident != sp->lcp.echoid) {
1779 IFNET_STAT_INC(ifp, ierrors, 1);
1784 log(-1, SPP_FMT "lcp invalid echo reply "
1785 "packet length: %d bytes\n",
1786 SPP_ARGS(ifp), len);
1790 log(-1, SPP_FMT "lcp got echo rep\n",
1792 if (!(sp->lcp.opts & (1 << LCP_OPT_MAGIC)) ||
1793 ntohl (*(long*)(h+1)) != sp->lcp.magic)
1794 sp->pp_alivecnt = 0;
1797 /* Unknown packet type -- send Code-Reject packet. */
1800 log(-1, SPP_FMT "%s send code-rej for 0x%x\n",
1801 SPP_ARGS(ifp), cp->name, h->type);
1802 sppp_cp_send(sp, cp->proto, CODE_REJ,
1803 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h);
1804 IFNET_STAT_INC(ifp, ierrors, 1);
1810 * The generic part of all Up/Down/Open/Close/TO event handlers.
1811 * Basically, the state transition handling in the automaton.
1814 sppp_up_event(const struct cp *cp, struct sppp *sp)
1819 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
1820 SPP_ARGS(ifp), cp->name,
1821 sppp_state_name(sp->state[cp->protoidx]));
1823 switch (sp->state[cp->protoidx]) {
1825 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1827 case STATE_STARTING:
1828 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1830 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1833 kprintf(SPP_FMT "%s illegal up in state %s\n",
1834 SPP_ARGS(ifp), cp->name,
1835 sppp_state_name(sp->state[cp->protoidx]));
1840 sppp_down_event(const struct cp *cp, struct sppp *sp)
1845 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
1846 SPP_ARGS(ifp), cp->name,
1847 sppp_state_name(sp->state[cp->protoidx]));
1849 switch (sp->state[cp->protoidx]) {
1852 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1855 sppp_cp_change_state(cp, sp, STATE_STARTING);
1858 case STATE_STOPPING:
1859 case STATE_REQ_SENT:
1860 case STATE_ACK_RCVD:
1861 case STATE_ACK_SENT:
1862 sppp_cp_change_state(cp, sp, STATE_STARTING);
1866 sppp_cp_change_state(cp, sp, STATE_STARTING);
1869 kprintf(SPP_FMT "%s illegal down in state %s\n",
1870 SPP_ARGS(ifp), cp->name,
1871 sppp_state_name(sp->state[cp->protoidx]));
1877 sppp_open_event(const struct cp *cp, struct sppp *sp)
1882 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
1883 SPP_ARGS(ifp), cp->name,
1884 sppp_state_name(sp->state[cp->protoidx]));
1886 switch (sp->state[cp->protoidx]) {
1888 sppp_cp_change_state(cp, sp, STATE_STARTING);
1891 case STATE_STARTING:
1894 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1896 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1900 * Try escaping stopped state. This seems to bite
1901 * people occasionally, in particular for IPCP,
1902 * presumably following previous IPCP negotiation
1903 * aborts. Somehow, we must have missed a Down event
1904 * which would have caused a transition into starting
1905 * state, so as a bandaid we force the Down event now.
1906 * This effectively implements (something like the)
1907 * `restart' option mentioned in the state transition
1908 * table of RFC 1661.
1910 sppp_cp_change_state(cp, sp, STATE_STARTING);
1913 case STATE_STOPPING:
1914 case STATE_REQ_SENT:
1915 case STATE_ACK_RCVD:
1916 case STATE_ACK_SENT:
1920 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1927 sppp_close_event(const struct cp *cp, struct sppp *sp)
1932 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
1933 SPP_ARGS(ifp), cp->name,
1934 sppp_state_name(sp->state[cp->protoidx]));
1936 switch (sp->state[cp->protoidx]) {
1941 case STATE_STARTING:
1942 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1946 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1948 case STATE_STOPPING:
1949 sppp_cp_change_state(cp, sp, STATE_CLOSING);
1954 case STATE_REQ_SENT:
1955 case STATE_ACK_RCVD:
1956 case STATE_ACK_SENT:
1957 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
1958 sppp_cp_send(sp, cp->proto, TERM_REQ,
1959 ++sp->pp_seq[cp->protoidx], 0, 0);
1960 sppp_cp_change_state(cp, sp, STATE_CLOSING);
1966 sppp_to_event(const struct cp *cp, struct sppp *sp)
1973 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
1974 SPP_ARGS(ifp), cp->name,
1975 sppp_state_name(sp->state[cp->protoidx]),
1976 sp->rst_counter[cp->protoidx]);
1978 if (--sp->rst_counter[cp->protoidx] < 0)
1980 switch (sp->state[cp->protoidx]) {
1982 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1985 case STATE_STOPPING:
1986 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1989 case STATE_REQ_SENT:
1990 case STATE_ACK_RCVD:
1991 case STATE_ACK_SENT:
1992 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1998 switch (sp->state[cp->protoidx]) {
2000 case STATE_STOPPING:
2001 sppp_cp_send(sp, cp->proto, TERM_REQ,
2002 ++sp->pp_seq[cp->protoidx], 0, 0);
2003 callout_reset(&sp->timeout[cp->protoidx],
2004 sp->lcp.timeout, cp->TO, sp);
2006 case STATE_REQ_SENT:
2007 case STATE_ACK_RCVD:
2009 /* sppp_cp_change_state() will restart the timer */
2010 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
2012 case STATE_ACK_SENT:
2014 callout_reset(&sp->timeout[cp->protoidx],
2015 sp->lcp.timeout, cp->TO, sp);
2023 * Change the state of a control protocol in the state automaton.
2024 * Takes care of starting/stopping the restart timer.
2027 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
2029 sp->state[cp->protoidx] = newstate;
2030 callout_stop(&sp->timeout[cp->protoidx]);
2034 case STATE_STARTING:
2040 case STATE_STOPPING:
2041 case STATE_REQ_SENT:
2042 case STATE_ACK_RCVD:
2043 case STATE_ACK_SENT:
2044 callout_reset(&sp->timeout[cp->protoidx],
2045 sp->lcp.timeout, cp->TO, sp);
2051 *--------------------------------------------------------------------------*
2053 * The LCP implementation. *
2055 *--------------------------------------------------------------------------*
2058 sppp_lcp_init(struct sppp *sp)
2060 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2062 sp->state[IDX_LCP] = STATE_INITIAL;
2063 sp->fail_counter[IDX_LCP] = 0;
2064 sp->pp_seq[IDX_LCP] = 0;
2065 sp->pp_rseq[IDX_LCP] = 0;
2067 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2069 /* Note that these values are relevant for all control protocols */
2070 sp->lcp.timeout = 3 * hz;
2071 sp->lcp.max_terminate = 2;
2072 sp->lcp.max_configure = 10;
2073 sp->lcp.max_failure = 10;
2074 callout_init(&sp->timeout[IDX_LCP]);
2078 sppp_lcp_up(struct sppp *sp)
2082 sp->pp_alivecnt = 0;
2083 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2086 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2088 * If this interface is passive or dial-on-demand, and we are
2089 * still in Initial state, it means we've got an incoming
2090 * call. Activate the interface.
2092 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
2095 SPP_FMT "Up event", SPP_ARGS(ifp));
2096 ifp->if_flags |= IFF_RUNNING;
2097 if (sp->state[IDX_LCP] == STATE_INITIAL) {
2099 log(-1, "(incoming call)\n");
2100 sp->pp_flags |= PP_CALLIN;
2104 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 &&
2105 (sp->state[IDX_LCP] == STATE_INITIAL)) {
2106 ifp->if_flags |= IFF_RUNNING;
2110 sppp_up_event(&lcp, sp);
2114 sppp_lcp_down(struct sppp *sp)
2118 sppp_down_event(&lcp, sp);
2121 * If this is neither a dial-on-demand nor a passive
2122 * interface, simulate an ``ifconfig down'' action, so the
2123 * administrator can force a redial by another ``ifconfig
2124 * up''. XXX For leased line operation, should we immediately
2125 * try to reopen the connection here?
2127 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
2129 SPP_FMT "Down event, taking interface down.\n",
2135 SPP_FMT "Down event (carrier loss)\n",
2137 sp->pp_flags &= ~PP_CALLIN;
2138 if (sp->state[IDX_LCP] != STATE_INITIAL)
2140 ifp->if_flags &= ~IFF_RUNNING;
2145 sppp_lcp_open(struct sppp *sp)
2148 * If we are authenticator, negotiate LCP_AUTH
2150 if (sp->hisauth.proto != 0)
2151 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
2153 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2154 sp->pp_flags &= ~PP_NEEDAUTH;
2155 sppp_open_event(&lcp, sp);
2159 sppp_lcp_close(struct sppp *sp)
2161 sppp_close_event(&lcp, sp);
2165 sppp_lcp_TO(void *cookie)
2167 sppp_to_event(&lcp, (struct sppp *)cookie);
2171 * Analyze a configure request. Return true if it was agreeable, and
2172 * caused action sca, false if it has been rejected or nak'ed, and
2173 * caused action scn. (The return value is used to make the state
2174 * transition decision in the state automaton.)
2177 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2180 u_char *buf, *r, *p;
2187 buf = r = kmalloc (len, M_TEMP, M_INTWAIT);
2190 log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
2193 /* pass 1: check for things that need to be rejected */
2195 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2196 /* Sanity check option length */
2198 /* Malicious option - drop immediately.
2199 * XXX Maybe we should just RXJ it?
2201 log(-1, "%s: received malicious LCP option 0x%02x, "
2202 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname,
2207 log(-1, " %s ", sppp_lcp_opt_name(*p));
2211 if (len >= 6 && p[1] == 6)
2214 log(-1, "[invalid] ");
2216 case LCP_OPT_ASYNC_MAP:
2217 /* Async control character map. */
2218 if (len >= 6 && p[1] == 6)
2221 log(-1, "[invalid] ");
2224 /* Maximum receive unit. */
2225 if (len >= 4 && p[1] == 4)
2228 log(-1, "[invalid] ");
2230 case LCP_OPT_AUTH_PROTO:
2233 log(-1, "[invalid] ");
2236 authproto = (p[2] << 8) + p[3];
2237 if (authproto == PPP_CHAP && p[1] != 5) {
2239 log(-1, "[invalid chap len] ");
2242 if (sp->myauth.proto == 0) {
2243 /* we are not configured to do auth */
2245 log(-1, "[not configured] ");
2249 * Remote want us to authenticate, remember this,
2250 * so we stay in PHASE_AUTHENTICATE after LCP got
2253 sp->pp_flags |= PP_NEEDAUTH;
2256 /* Others not supported. */
2261 /* Add the option to rejected list. */
2268 log(-1, " send conf-rej\n");
2269 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2275 * pass 2: check for option values that are unacceptable and
2276 * thus require to be nak'ed.
2279 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
2284 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2286 log(-1, " %s ", sppp_lcp_opt_name(*p));
2289 /* Magic number -- extract. */
2290 nmagic = (u_long)p[2] << 24 |
2291 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2292 if (nmagic != sp->lcp.magic) {
2295 log(-1, "0x%lx ", nmagic);
2298 if (debug && sp->pp_loopcnt < MAXALIVECNT*5)
2299 log(-1, "[glitch] ");
2302 * We negate our magic here, and NAK it. If
2303 * we see it later in an NAK packet, we
2304 * suggest a new one.
2306 nmagic = ~sp->lcp.magic;
2308 p[2] = nmagic >> 24;
2309 p[3] = nmagic >> 16;
2314 case LCP_OPT_ASYNC_MAP:
2316 * Async control character map -- just ignore it.
2318 * Quote from RFC 1662, chapter 6:
2319 * To enable this functionality, synchronous PPP
2320 * implementations MUST always respond to the
2321 * Async-Control-Character-Map Configuration
2322 * Option with the LCP Configure-Ack. However,
2323 * acceptance of the Configuration Option does
2324 * not imply that the synchronous implementation
2325 * will do any ACCM mapping. Instead, all such
2326 * octet mapping will be performed by the
2327 * asynchronous-to-synchronous converter.
2333 * Maximum receive unit. Always agreeable,
2334 * but ignored by now.
2336 sp->lcp.their_mru = p[2] * 256 + p[3];
2338 log(-1, "%lu ", sp->lcp.their_mru);
2341 case LCP_OPT_AUTH_PROTO:
2342 authproto = (p[2] << 8) + p[3];
2343 if (sp->myauth.proto != authproto) {
2344 /* not agreed, nak */
2346 log(-1, "[mine %s != his %s] ",
2347 sppp_proto_name(sp->hisauth.proto),
2348 sppp_proto_name(authproto));
2349 p[2] = sp->myauth.proto >> 8;
2350 p[3] = sp->myauth.proto;
2353 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
2355 log(-1, "[chap not MD5] ");
2361 /* Add the option to nak'ed list. */
2368 * Local and remote magics equal -- loopback?
2370 if (sp->pp_loopcnt >= MAXALIVECNT*5) {
2371 if (sp->pp_loopcnt == MAXALIVECNT*5)
2372 kprintf (SPP_FMT "loopback\n",
2374 if (ifp->if_flags & IFF_UP) {
2376 IF_DRAIN(&sp->pp_cpq);
2381 } else if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
2383 log(-1, " max_failure (%d) exceeded, "
2385 sp->lcp.max_failure);
2386 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2389 log(-1, " send conf-nak\n");
2390 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
2394 log(-1, " send conf-ack\n");
2395 sp->fail_counter[IDX_LCP] = 0;
2397 sppp_cp_send (sp, PPP_LCP, CONF_ACK,
2398 h->ident, origlen, h+1);
2401 kfree (buf, M_TEMP);
2410 * Analyze the LCP Configure-Reject option list, and adjust our
2414 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
2420 buf = kmalloc (len, M_TEMP, M_INTWAIT);
2423 log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
2427 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2428 /* Sanity check option length */
2431 * Malicious option - drop immediately.
2432 * XXX Maybe we should just RXJ it?
2434 log(-1, "%s: received malicious LCP option, "
2435 "dropping.\n", ifp->if_xname);
2439 log(-1, " %s ", sppp_lcp_opt_name(*p));
2442 /* Magic number -- can't use it, use 0 */
2443 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
2448 * Should not be rejected anyway, since we only
2449 * negotiate a MRU if explicitly requested by
2452 sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
2454 case LCP_OPT_AUTH_PROTO:
2456 * Peer doesn't want to authenticate himself,
2457 * deny unless this is a dialout call, and
2458 * AUTHFLAG_NOCALLOUT is set.
2460 if ((sp->pp_flags & PP_CALLIN) == 0 &&
2461 (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
2463 log(-1, "[don't insist on auth "
2465 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2469 log(-1, "[access denied]\n");
2477 kfree (buf, M_TEMP);
2482 * Analyze the LCP Configure-NAK option list, and adjust our
2486 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
2493 buf = kmalloc (len, M_TEMP, M_INTWAIT);
2496 log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
2500 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2501 /* Sanity check option length */
2504 * Malicious option - drop immediately.
2505 * XXX Maybe we should just RXJ it?
2507 log(-1, "%s: received malicious LCP option, "
2508 "dropping.\n", ifp->if_xname);
2512 log(-1, " %s ", sppp_lcp_opt_name(*p));
2515 /* Magic number -- renegotiate */
2516 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
2517 len >= 6 && p[1] == 6) {
2518 magic = (u_long)p[2] << 24 |
2519 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2521 * If the remote magic is our negated one,
2522 * this looks like a loopback problem.
2523 * Suggest a new magic to make sure.
2525 if (magic == ~sp->lcp.magic) {
2527 log(-1, "magic glitch ");
2528 sp->lcp.magic = krandom();
2530 sp->lcp.magic = magic;
2532 log(-1, "%lu ", magic);
2538 * Peer wants to advise us to negotiate an MRU.
2539 * Agree on it if it's reasonable, or use
2540 * default otherwise.
2542 if (len >= 4 && p[1] == 4) {
2543 u_int mru = p[2] * 256 + p[3];
2545 log(-1, "%d ", mru);
2546 if (mru < PP_MTU || mru > PP_MAX_MRU)
2549 sp->lcp.opts |= (1 << LCP_OPT_MRU);
2552 case LCP_OPT_AUTH_PROTO:
2554 * Peer doesn't like our authentication method,
2558 log(-1, "[access denied]\n");
2566 kfree (buf, M_TEMP);
2571 sppp_lcp_tlu(struct sppp *sp)
2578 if (! (ifp->if_flags & IFF_UP) &&
2579 (ifp->if_flags & IFF_RUNNING)) {
2580 /* Coming out of loopback mode. */
2582 kprintf (SPP_FMT "up\n", SPP_ARGS(ifp));
2585 for (i = 0; i < IDX_COUNT; i++)
2586 if ((cps[i])->flags & CP_QUAL)
2589 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
2590 (sp->pp_flags & PP_NEEDAUTH) != 0)
2591 sp->pp_phase = PHASE_AUTHENTICATE;
2593 sp->pp_phase = PHASE_NETWORK;
2596 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2597 sppp_phase_name(sp->pp_phase));
2600 * Open all authentication protocols. This is even required
2601 * if we already proceeded to network phase, since it might be
2602 * that remote wants us to authenticate, so we might have to
2603 * send a PAP request. Undesired authentication protocols
2604 * don't do anything when they get an Open event.
2606 for (i = 0; i < IDX_COUNT; i++)
2607 if ((cps[i])->flags & CP_AUTH)
2610 if (sp->pp_phase == PHASE_NETWORK) {
2611 /* Notify all NCPs. */
2612 for (i = 0; i < IDX_COUNT; i++)
2613 if (((cps[i])->flags & CP_NCP) &&
2616 * Hack to administratively disable IPv6 if
2617 * not desired. Perhaps we should have another
2618 * flag for this, but right now, we can make
2619 * all struct cp's read/only.
2621 (cps[i] != &ipv6cp ||
2622 (sp->confflags & CONF_ENABLE_IPV6)))
2626 /* Send Up events to all started protos. */
2627 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2628 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0)
2631 /* notify low-level driver of state change */
2633 sp->pp_chg(sp, (int)sp->pp_phase);
2635 if (sp->pp_phase == PHASE_NETWORK)
2636 /* if no NCP is starting, close down */
2637 sppp_lcp_check_and_close(sp);
2641 sppp_lcp_tld(struct sppp *sp)
2647 sp->pp_phase = PHASE_TERMINATE;
2650 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2651 sppp_phase_name(sp->pp_phase));
2654 * Take upper layers down. We send the Down event first and
2655 * the Close second to prevent the upper layers from sending
2656 * ``a flurry of terminate-request packets'', as the RFC
2659 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2660 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) {
2662 (cps[i])->Close(sp);
2667 sppp_lcp_tls(struct sppp *sp)
2671 sp->pp_phase = PHASE_ESTABLISH;
2674 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2675 sppp_phase_name(sp->pp_phase));
2677 /* Notify lower layer if desired. */
2685 sppp_lcp_tlf(struct sppp *sp)
2689 sp->pp_phase = PHASE_DEAD;
2691 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2692 sppp_phase_name(sp->pp_phase));
2694 /* Notify lower layer if desired. */
2702 sppp_lcp_scr(struct sppp *sp)
2704 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
2708 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
2709 if (! sp->lcp.magic)
2710 sp->lcp.magic = krandom();
2711 opt[i++] = LCP_OPT_MAGIC;
2713 opt[i++] = sp->lcp.magic >> 24;
2714 opt[i++] = sp->lcp.magic >> 16;
2715 opt[i++] = sp->lcp.magic >> 8;
2716 opt[i++] = sp->lcp.magic;
2719 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
2720 opt[i++] = LCP_OPT_MRU;
2722 opt[i++] = sp->lcp.mru >> 8;
2723 opt[i++] = sp->lcp.mru;
2726 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
2727 authproto = sp->hisauth.proto;
2728 opt[i++] = LCP_OPT_AUTH_PROTO;
2729 opt[i++] = authproto == PPP_CHAP? 5: 4;
2730 opt[i++] = authproto >> 8;
2731 opt[i++] = authproto;
2732 if (authproto == PPP_CHAP)
2733 opt[i++] = CHAP_MD5;
2736 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP];
2737 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
2741 * Check the open NCPs, return true if at least one NCP is open.
2744 sppp_ncp_check(struct sppp *sp)
2748 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2749 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP)
2755 * Re-check the open NCPs and see if we should terminate the link.
2756 * Called by the NCPs during their tlf action handling.
2759 sppp_lcp_check_and_close(struct sppp *sp)
2762 if (sp->pp_phase < PHASE_NETWORK)
2763 /* don't bother, we are already going down */
2766 if (sppp_ncp_check(sp))
2773 *--------------------------------------------------------------------------*
2775 * The IPCP implementation. *
2777 *--------------------------------------------------------------------------*
2781 sppp_ipcp_init(struct sppp *sp)
2785 sp->state[IDX_IPCP] = STATE_INITIAL;
2786 sp->fail_counter[IDX_IPCP] = 0;
2787 sp->pp_seq[IDX_IPCP] = 0;
2788 sp->pp_rseq[IDX_IPCP] = 0;
2789 callout_init(&sp->timeout[IDX_IPCP]);
2793 sppp_ipcp_up(struct sppp *sp)
2795 sppp_up_event(&ipcp, sp);
2799 sppp_ipcp_down(struct sppp *sp)
2801 sppp_down_event(&ipcp, sp);
2805 sppp_ipcp_open(struct sppp *sp)
2808 u_long myaddr, hisaddr;
2810 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN | IPCP_MYADDR_SEEN |
2811 IPCP_MYADDR_DYN | IPCP_VJ);
2814 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
2816 * If we don't have his address, this probably means our
2817 * interface doesn't want to talk IP at all. (This could
2818 * be the case if somebody wants to speak only IPX, for
2819 * example.) Don't open IPCP in this case.
2821 if (hisaddr == 0L) {
2822 /* XXX this message should go away */
2824 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
2830 * I don't have an assigned address, so i need to
2831 * negotiate my address.
2833 sp->ipcp.flags |= IPCP_MYADDR_DYN;
2834 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
2836 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
2837 if (sp->confflags & CONF_ENABLE_VJ) {
2838 sp->ipcp.opts |= (1 << IPCP_OPT_COMPRESSION);
2839 sp->ipcp.max_state = MAX_STATES - 1;
2840 sp->ipcp.compress_cid = 1;
2842 sppp_open_event(&ipcp, sp);
2846 sppp_ipcp_close(struct sppp *sp)
2848 sppp_close_event(&ipcp, sp);
2849 if (sp->ipcp.flags & IPCP_MYADDR_DYN)
2851 * My address was dynamic, clear it again.
2853 sppp_set_ip_addr(sp, 0L);
2857 sppp_ipcp_TO(void *cookie)
2859 sppp_to_event(&ipcp, (struct sppp *)cookie);
2863 * Analyze a configure request. Return true if it was agreeable, and
2864 * caused action sca, false if it has been rejected or nak'ed, and
2865 * caused action scn. (The return value is used to make the state
2866 * transition decision in the state automaton.)
2869 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2871 u_char *buf, *r, *p;
2872 struct ifnet *ifp = &sp->pp_if;
2873 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
2874 u_long hisaddr, desiredaddr;
2881 * Make sure to allocate a buf that can at least hold a
2882 * conf-nak with an `address' option. We might need it below.
2884 buf = r = kmalloc ((len < 6? 6: len), M_TEMP, M_INTWAIT);
2886 /* pass 1: see if we can recognize them */
2888 log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
2891 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2892 /* Sanity check option length */
2894 /* XXX should we just RXJ? */
2895 log(-1, "%s: malicious IPCP option received, dropping\n",
2900 log(-1, " %s ", sppp_ipcp_opt_name(*p));
2902 case IPCP_OPT_COMPRESSION:
2903 if (!(sp->confflags & CONF_ENABLE_VJ)) {
2904 /* VJ compression administratively disabled */
2906 log(-1, "[locally disabled] ");
2910 * In theory, we should only conf-rej an
2911 * option that is shorter than RFC 1618
2912 * requires (i.e. < 4), and should conf-nak
2913 * anything else that is not VJ. However,
2914 * since our algorithm always uses the
2915 * original option to NAK it with new values,
2916 * things would become more complicated. In
2917 * pratice, the only commonly implemented IP
2918 * compression option is VJ anyway, so the
2919 * difference is negligible.
2921 if (len >= 6 && p[1] == 6) {
2923 * correctly formed compression option
2924 * that could be VJ compression
2929 log(-1, "optlen %d [invalid/unsupported] ",
2932 case IPCP_OPT_ADDRESS:
2933 if (len >= 6 && p[1] == 6) {
2934 /* correctly formed address option */
2938 log(-1, "[invalid] ");
2941 /* Others not supported. */
2946 /* Add the option to rejected list. */
2953 log(-1, " send conf-rej\n");
2954 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
2959 /* pass 2: parse option values */
2960 sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
2962 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
2966 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2968 log(-1, " %s ", sppp_ipcp_opt_name(*p));
2970 case IPCP_OPT_COMPRESSION:
2971 desiredcomp = p[2] << 8 | p[3];
2972 /* We only support VJ */
2973 if (desiredcomp == IPCP_COMP_VJ) {
2975 log(-1, "VJ [ack] ");
2976 sp->ipcp.flags |= IPCP_VJ;
2977 sl_compress_init(sp->pp_comp, p[4]);
2978 sp->ipcp.max_state = p[4];
2979 sp->ipcp.compress_cid = p[5];
2983 log(-1, "compproto %#04x [not supported] ",
2985 p[2] = IPCP_COMP_VJ >> 8;
2986 p[3] = IPCP_COMP_VJ;
2987 p[4] = sp->ipcp.max_state;
2988 p[5] = sp->ipcp.compress_cid;
2990 case IPCP_OPT_ADDRESS:
2991 /* This is the address he wants in his end */
2992 desiredaddr = p[2] << 24 | p[3] << 16 |
2994 if (desiredaddr == hisaddr ||
2995 (hisaddr >= 1 && hisaddr <= 254 && desiredaddr != 0)) {
2997 * Peer's address is same as our value,
2998 * or we have set it to 0.0.0.* to
2999 * indicate that we do not really care,
3000 * this is agreeable. Gonna conf-ack
3004 log(-1, "%s [ack] ",
3005 sppp_dotted_quad(hisaddr));
3006 /* record that we've seen it already */
3007 sp->ipcp.flags |= IPCP_HISADDR_SEEN;
3011 * The address wasn't agreeable. This is either
3012 * he sent us 0.0.0.0, asking to assign him an
3013 * address, or he send us another address not
3014 * matching our value. Either case, we gonna
3015 * conf-nak it with our value.
3016 * XXX: we should "rej" if hisaddr == 0
3019 if (desiredaddr == 0)
3020 log(-1, "[addr requested] ");
3022 log(-1, "%s [not agreed] ",
3023 sppp_dotted_quad(desiredaddr));
3026 p[2] = hisaddr >> 24;
3027 p[3] = hisaddr >> 16;
3028 p[4] = hisaddr >> 8;
3032 /* Add the option to nak'ed list. */
3039 * If we are about to conf-ack the request, but haven't seen
3040 * his address so far, gonna conf-nak it instead, with the
3041 * `address' option present and our idea of his address being
3042 * filled in there, to request negotiation of both addresses.
3044 * XXX This can result in an endless req - nak loop if peer
3045 * doesn't want to send us his address. Q: What should we do
3046 * about it? XXX A: implement the max-failure counter.
3048 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
3049 buf[0] = IPCP_OPT_ADDRESS;
3051 buf[2] = hisaddr >> 24;
3052 buf[3] = hisaddr >> 16;
3053 buf[4] = hisaddr >> 8;
3057 log(-1, "still need hisaddr ");
3062 log(-1, " send conf-nak\n");
3063 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
3066 log(-1, " send conf-ack\n");
3067 sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
3068 h->ident, origlen, h+1);
3071 kfree (buf, M_TEMP);
3080 * Analyze the IPCP Configure-Reject option list, and adjust our
3084 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3087 struct ifnet *ifp = &sp->pp_if;
3088 int debug = ifp->if_flags & IFF_DEBUG;
3091 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3094 log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
3098 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3099 /* Sanity check option length */
3101 /* XXX should we just RXJ? */
3102 log(-1, "%s: malicious IPCP option received, dropping\n",
3107 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3109 case IPCP_OPT_COMPRESSION:
3110 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESSION);
3112 case IPCP_OPT_ADDRESS:
3114 * Peer doesn't grok address option. This is
3115 * bad. XXX Should we better give up here?
3116 * XXX We could try old "addresses" option...
3118 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
3125 kfree (buf, M_TEMP);
3130 * Analyze the IPCP Configure-NAK option list, and adjust our
3134 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3137 struct ifnet *ifp = &sp->pp_if;
3138 int debug = ifp->if_flags & IFF_DEBUG;
3143 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3146 log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
3150 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3151 /* Sanity check option length */
3153 /* XXX should we just RXJ? */
3154 log(-1, "%s: malicious IPCP option received, dropping\n",
3159 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3161 case IPCP_OPT_COMPRESSION:
3162 if (len >= 6 && p[1] == 6) {
3163 desiredcomp = p[2] << 8 | p[3];
3165 log(-1, "[wantcomp %#04x] ",
3167 if (desiredcomp == IPCP_COMP_VJ) {
3168 sl_compress_init(sp->pp_comp, p[4]);
3169 sp->ipcp.max_state = p[4];
3170 sp->ipcp.compress_cid = p[5];
3172 log(-1, "[agree] ");
3175 ~(1 << IPCP_OPT_COMPRESSION);
3178 case IPCP_OPT_ADDRESS:
3180 * Peer doesn't like our local IP address. See
3181 * if we can do something for him. We'll drop
3182 * him our address then.
3184 if (len >= 6 && p[1] == 6) {
3185 wantaddr = p[2] << 24 | p[3] << 16 |
3187 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
3189 log(-1, "[wantaddr %s] ",
3190 sppp_dotted_quad(wantaddr));
3192 * When doing dynamic address assignment,
3193 * we accept his offer. Otherwise, we
3194 * ignore it and thus continue to negotiate
3195 * our already existing value.
3196 * XXX: Bogus, if he said no once, he'll
3197 * just say no again, might as well die.
3199 if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
3200 sppp_set_ip_addr(sp, wantaddr);
3202 log(-1, "[agree] ");
3203 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
3211 kfree (buf, M_TEMP);
3216 sppp_ipcp_tlu(struct sppp *sp)
3218 /* we are up - notify isdn daemon */
3224 sppp_ipcp_tld(struct sppp *sp)
3229 sppp_ipcp_tls(struct sppp *sp)
3231 /* indicate to LCP that it must stay alive */
3232 sp->lcp.protos |= (1 << IDX_IPCP);
3236 sppp_ipcp_tlf(struct sppp *sp)
3238 /* we no longer need LCP */
3239 sp->lcp.protos &= ~(1 << IDX_IPCP);
3240 sppp_lcp_check_and_close(sp);
3244 sppp_ipcp_scr(struct sppp *sp)
3246 char opt[6 /* compression */ + 6 /* address */];
3250 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
3251 opt[i++] = IPCP_OPT_COMPRESSION;
3253 opt[i++] = IPCP_COMP_VJ >> 8;
3254 opt[i++] = IPCP_COMP_VJ;
3255 opt[i++] = sp->ipcp.max_state;
3256 opt[i++] = sp->ipcp.compress_cid;
3258 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
3259 sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
3260 opt[i++] = IPCP_OPT_ADDRESS;
3262 opt[i++] = ouraddr >> 24;
3263 opt[i++] = ouraddr >> 16;
3264 opt[i++] = ouraddr >> 8;
3268 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP];
3269 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
3273 *--------------------------------------------------------------------------*
3275 * The IPv6CP implementation. *
3277 *--------------------------------------------------------------------------*
3282 sppp_ipv6cp_init(struct sppp *sp)
3284 sp->ipv6cp.opts = 0;
3285 sp->ipv6cp.flags = 0;
3286 sp->state[IDX_IPV6CP] = STATE_INITIAL;
3287 sp->fail_counter[IDX_IPV6CP] = 0;
3288 sp->pp_seq[IDX_IPV6CP] = 0;
3289 sp->pp_rseq[IDX_IPV6CP] = 0;
3290 callout_init(&sp->timeout[IDX_IPV6CP]);
3294 sppp_ipv6cp_up(struct sppp *sp)
3296 sppp_up_event(&ipv6cp, sp);
3300 sppp_ipv6cp_down(struct sppp *sp)
3302 sppp_down_event(&ipv6cp, sp);
3306 sppp_ipv6cp_open(struct sppp *sp)
3309 struct in6_addr myaddr, hisaddr;
3311 #ifdef IPV6CP_MYIFID_DYN
3312 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN);
3314 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN;
3317 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0);
3319 * If we don't have our address, this probably means our
3320 * interface doesn't want to talk IPv6 at all. (This could
3321 * be the case if somebody wants to speak only IPX, for
3322 * example.) Don't open IPv6CP in this case.
3324 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) {
3325 /* XXX this message should go away */
3327 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n",
3332 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3333 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3334 sppp_open_event(&ipv6cp, sp);
3338 sppp_ipv6cp_close(struct sppp *sp)
3340 sppp_close_event(&ipv6cp, sp);
3344 sppp_ipv6cp_TO(void *cookie)
3346 sppp_to_event(&ipv6cp, (struct sppp *)cookie);
3350 * Analyze a configure request. Return true if it was agreeable, and
3351 * caused action sca, false if it has been rejected or nak'ed, and
3352 * caused action scn. (The return value is used to make the state
3353 * transition decision in the state automaton.)
3356 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3358 u_char *buf, *r, *p;
3359 struct ifnet *ifp = &sp->pp_if;
3360 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
3361 struct in6_addr myaddr, desiredaddr, suggestaddr;
3364 int collision, nohisaddr;
3369 * Make sure to allocate a buf that can at least hold a
3370 * conf-nak with an `address' option. We might need it below.
3372 buf = r = kmalloc ((len < 6? 6: len), M_TEMP, M_INTWAIT);
3374 /* pass 1: see if we can recognize them */
3376 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:",
3380 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3381 /* Sanity check option length */
3384 log(-1, "%s: received malicious IPCPv6 option, "
3385 "dropping\n", ifp->if_xname);
3389 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3391 case IPV6CP_OPT_IFID:
3392 if (len >= 10 && p[1] == 10 && ifidcount == 0) {
3393 /* correctly formed address option */
3398 log(-1, " [invalid]");
3401 case IPV6CP_OPT_COMPRESSION:
3402 if (len >= 4 && p[1] >= 4) {
3403 /* correctly formed compress option */
3407 log(-1, " [invalid]");
3411 /* Others not supported. */
3416 /* Add the option to rejected list. */
3423 log(-1, " send conf-rej\n");
3424 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf);
3429 /* pass 2: parse option values */
3430 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
3432 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ",
3437 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3439 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3442 case IPV6CP_OPT_COMPRESSION:
3445 case IPV6CP_OPT_IFID:
3446 bzero(&desiredaddr, sizeof(desiredaddr));
3447 bcopy(&p[2], &desiredaddr.s6_addr[8], 8);
3448 collision = (bcmp(&desiredaddr.s6_addr[8],
3449 &myaddr.s6_addr[8], 8) == 0);
3450 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr);
3452 desiredaddr.s6_addr16[0] = htons(0xfe80);
3453 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index);
3455 if (!collision && !nohisaddr) {
3456 /* no collision, hisaddr known - Conf-Ack */
3461 ip6_sprintf(&desiredaddr),
3462 sppp_cp_type_name(type));
3467 bzero(&suggestaddr, sizeof(suggestaddr));
3468 if (collision && nohisaddr) {
3469 /* collision, hisaddr unknown - Conf-Rej */
3474 * - no collision, hisaddr unknown, or
3475 * - collision, hisaddr known
3476 * Conf-Nak, suggest hisaddr
3479 sppp_suggest_ip6_addr(sp, &suggestaddr);
3480 bcopy(&suggestaddr.s6_addr[8], &p[2], 8);
3483 log(-1, " %s [%s]", ip6_sprintf(&desiredaddr),
3484 sppp_cp_type_name(type));
3487 /* Add the option to nak'ed list. */
3493 if (rlen == 0 && type == CONF_ACK) {
3495 log(-1, " send %s\n", sppp_cp_type_name(type));
3496 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1);
3499 if (type == CONF_ACK)
3500 panic("IPv6CP RCR: CONF_ACK with non-zero rlen");
3504 log(-1, " send %s suggest %s\n",
3505 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr));
3507 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf);
3511 kfree (buf, M_TEMP);
3520 * Analyze the IPv6CP Configure-Reject option list, and adjust our
3524 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3527 struct ifnet *ifp = &sp->pp_if;
3528 int debug = ifp->if_flags & IFF_DEBUG;
3531 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3534 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:",
3538 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3541 log(-1, "%s: received malicious IPCPv6 option, "
3542 "dropping\n", ifp->if_xname);
3546 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3548 case IPV6CP_OPT_IFID:
3550 * Peer doesn't grok address option. This is
3551 * bad. XXX Should we better give up here?
3553 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID);
3556 case IPV6CP_OPT_COMPRESS:
3557 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS);
3565 kfree (buf, M_TEMP);
3570 * Analyze the IPv6CP Configure-NAK option list, and adjust our
3574 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3577 struct ifnet *ifp = &sp->pp_if;
3578 int debug = ifp->if_flags & IFF_DEBUG;
3579 struct in6_addr suggestaddr;
3582 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3585 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:",
3589 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3592 log(-1, "%s: received malicious IPCPv6 option, "
3593 "dropping\n", ifp->if_xname);
3597 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3599 case IPV6CP_OPT_IFID:
3601 * Peer doesn't like our local ifid. See
3602 * if we can do something for him. We'll drop
3603 * him our address then.
3605 if (len < 10 || p[1] != 10)
3607 bzero(&suggestaddr, sizeof(suggestaddr));
3608 suggestaddr.s6_addr16[0] = htons(0xfe80);
3609 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index);
3610 bcopy(&p[2], &suggestaddr.s6_addr[8], 8);
3612 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3614 log(-1, " [suggestaddr %s]",
3615 ip6_sprintf(&suggestaddr));
3616 #ifdef IPV6CP_MYIFID_DYN
3618 * When doing dynamic address assignment,
3619 * we accept his offer.
3621 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) {
3622 struct in6_addr lastsuggest;
3624 * If <suggested myaddr from peer> equals to
3625 * <hisaddr we have suggested last time>,
3626 * we have a collision. generate new random
3629 sppp_suggest_ip6_addr(&lastsuggest);
3630 if (IN6_ARE_ADDR_EQUAL(&suggestaddr,
3633 log(-1, " [random]");
3634 sppp_gen_ip6_addr(sp, &suggestaddr);
3636 sppp_set_ip6_addr(sp, &suggestaddr, 0);
3638 log(-1, " [agree]");
3639 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3643 * Since we do not do dynamic address assignment,
3644 * we ignore it and thus continue to negotiate
3645 * our already existing value. This can possibly
3646 * go into infinite request-reject loop.
3648 * This is not likely because we normally use
3649 * ifid based on MAC-address.
3650 * If you have no ethernet card on the node, too bad.
3651 * XXX should we use fail_counter?
3656 case IPV6CP_OPT_COMPRESS:
3658 * Peer wants different compression parameters.
3667 kfree (buf, M_TEMP);
3671 sppp_ipv6cp_tlu(struct sppp *sp)
3673 /* we are up - notify isdn daemon */
3679 sppp_ipv6cp_tld(struct sppp *sp)
3684 sppp_ipv6cp_tls(struct sppp *sp)
3686 /* indicate to LCP that it must stay alive */
3687 sp->lcp.protos |= (1 << IDX_IPV6CP);
3691 sppp_ipv6cp_tlf(struct sppp *sp)
3694 #if 0 /* need #if 0 to close IPv6CP properly */
3695 /* we no longer need LCP */
3696 sp->lcp.protos &= ~(1 << IDX_IPV6CP);
3697 sppp_lcp_check_and_close(sp);
3702 sppp_ipv6cp_scr(struct sppp *sp)
3704 char opt[10 /* ifid */ + 4 /* compression, minimum */];
3705 struct in6_addr ouraddr;
3708 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) {
3709 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0);
3710 opt[i++] = IPV6CP_OPT_IFID;
3712 bcopy(&ouraddr.s6_addr[8], &opt[i], 8);
3717 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) {
3718 opt[i++] = IPV6CP_OPT_COMPRESSION;
3720 opt[i++] = 0; /* TBD */
3721 opt[i++] = 0; /* TBD */
3722 /* variable length data may follow */
3726 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP];
3727 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt);
3731 sppp_ipv6cp_init(struct sppp *sp)
3736 sppp_ipv6cp_up(struct sppp *sp)
3741 sppp_ipv6cp_down(struct sppp *sp)
3747 sppp_ipv6cp_open(struct sppp *sp)
3752 sppp_ipv6cp_close(struct sppp *sp)
3757 sppp_ipv6cp_TO(void *sp)
3762 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3768 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3773 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3778 sppp_ipv6cp_tlu(struct sppp *sp)
3783 sppp_ipv6cp_tld(struct sppp *sp)
3788 sppp_ipv6cp_tls(struct sppp *sp)
3793 sppp_ipv6cp_tlf(struct sppp *sp)
3798 sppp_ipv6cp_scr(struct sppp *sp)
3804 *--------------------------------------------------------------------------*
3806 * The CHAP implementation. *
3808 *--------------------------------------------------------------------------*
3812 * The authentication protocols don't employ a full-fledged state machine as
3813 * the control protocols do, since they do have Open and Close events, but
3814 * not Up and Down, nor are they explicitly terminated. Also, use of the
3815 * authentication protocols may be different in both directions (this makes
3816 * sense, think of a machine that never accepts incoming calls but only
3817 * calls out, it doesn't require the called party to authenticate itself).
3819 * Our state machine for the local authentication protocol (we are requesting
3820 * the peer to authenticate) looks like:
3823 * +--------------------------------------------+
3825 * +--------+ Close +---------+ RCA+
3826 * | |<----------------------------------| |------+
3827 * +--->| Closed | TO* | Opened | sca |
3828 * | | |-----+ +-------| |<-----+
3829 * | +--------+ irc | | +---------+
3835 * | | +------->+ | |
3837 * | +--------+ V | |
3838 * | | |<----+<--------------------+ |
3844 * +------+ +------------------------------------------+
3845 * scn,tld sca,irc,ict,tlu
3850 * Open: LCP reached authentication phase
3851 * Close: LCP reached terminate phase
3853 * RCA+: received reply (pap-req, chap-response), acceptable
3854 * RCN: received reply (pap-req, chap-response), not acceptable
3855 * TO+: timeout with restart counter >= 0
3856 * TO-: timeout with restart counter < 0
3857 * TO*: reschedule timeout for CHAP
3859 * scr: send request packet (none for PAP, chap-challenge)
3860 * sca: send ack packet (pap-ack, chap-success)
3861 * scn: send nak packet (pap-nak, chap-failure)
3862 * ict: initialize re-challenge timer (CHAP only)
3864 * tlu: this-layer-up, LCP reaches network phase
3865 * tld: this-layer-down, LCP enters terminate phase
3867 * Note that in CHAP mode, after sending a new challenge, while the state
3868 * automaton falls back into Req-Sent state, it doesn't signal a tld
3869 * event to LCP, so LCP remains in network phase. Only after not getting
3870 * any response (or after getting an unacceptable response), CHAP closes,
3871 * causing LCP to enter terminate phase.
3873 * With PAP, there is no initial request that can be sent. The peer is
3874 * expected to send one based on the successful negotiation of PAP as
3875 * the authentication protocol during the LCP option negotiation.
3877 * Incoming authentication protocol requests (remote requests
3878 * authentication, we are peer) don't employ a state machine at all,
3879 * they are simply answered. Some peers [Ascend P50 firmware rev
3880 * 4.50] react allergically when sending IPCP requests while they are
3881 * still in authentication phase (thereby violating the standard that
3882 * demands that these NCP packets are to be discarded), so we keep
3883 * track of the peer demanding us to authenticate, and only proceed to
3884 * phase network once we've seen a positive acknowledge for the
3889 * Handle incoming CHAP packets.
3892 sppp_chap_input(struct sppp *sp, struct mbuf *m)
3895 struct lcp_header *h;
3897 u_char *value, *name, digest[AUTHKEYLEN], dsize;
3898 int value_len, name_len;
3901 len = m->m_pkthdr.len;
3905 SPP_FMT "chap invalid packet length: %d bytes\n",
3906 SPP_ARGS(ifp), len);
3909 h = mtod (m, struct lcp_header*);
3910 if (len > ntohs (h->len))
3911 len = ntohs (h->len);
3914 /* challenge, failure and success are his authproto */
3915 case CHAP_CHALLENGE:
3916 value = 1 + (u_char*)(h+1);
3917 value_len = value[-1];
3918 name = value + value_len;
3919 name_len = len - value_len - 5;
3923 SPP_FMT "chap corrupted challenge "
3924 "<%s id=0x%x len=%d",
3926 sppp_auth_type_name(PPP_CHAP, h->type),
3927 h->ident, ntohs(h->len));
3928 sppp_print_bytes((u_char*) (h+1), len-4);
3936 SPP_FMT "chap input <%s id=0x%x len=%d name=",
3938 sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
3940 sppp_print_string((char*) name, name_len);
3941 log(-1, " value-size=%d value=", value_len);
3942 sppp_print_bytes(value, value_len);
3946 /* Compute reply value. */
3948 MD5Update(&ctx, &h->ident, 1);
3949 MD5Update(&ctx, sp->myauth.secret,
3950 sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
3951 MD5Update(&ctx, value, value_len);
3952 MD5Final(digest, &ctx);
3953 dsize = sizeof digest;
3955 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
3956 sizeof dsize, (const char *)&dsize,
3957 sizeof digest, digest,
3958 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
3965 log(LOG_DEBUG, SPP_FMT "chap success",
3969 sppp_print_string((char*)(h + 1), len - 4);
3976 sp->pp_flags &= ~PP_NEEDAUTH;
3977 if (sp->myauth.proto == PPP_CHAP &&
3978 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
3979 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
3981 * We are authenticator for CHAP but didn't
3982 * complete yet. Leave it to tlu to proceed
3989 sppp_phase_network(sp);
3994 log(LOG_INFO, SPP_FMT "chap failure",
3998 sppp_print_string((char*)(h + 1), len - 4);
4002 log(LOG_INFO, SPP_FMT "chap failure\n",
4004 /* await LCP shutdown by authenticator */
4007 /* response is my authproto */
4009 value = 1 + (u_char*)(h+1);
4010 value_len = value[-1];
4011 name = value + value_len;
4012 name_len = len - value_len - 5;
4016 SPP_FMT "chap corrupted response "
4017 "<%s id=0x%x len=%d",
4019 sppp_auth_type_name(PPP_CHAP, h->type),
4020 h->ident, ntohs(h->len));
4021 sppp_print_bytes((u_char*)(h+1), len-4);
4026 if (h->ident != sp->confid[IDX_CHAP]) {
4029 SPP_FMT "chap dropping response for old ID "
4030 "(got %d, expected %d)\n",
4032 h->ident, sp->confid[IDX_CHAP]);
4035 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
4036 || bcmp(name, sp->hisauth.name, name_len) != 0) {
4037 log(LOG_INFO, SPP_FMT "chap response, his name ",
4039 sppp_print_string(name, name_len);
4040 log(-1, " != expected ");
4041 sppp_print_string(sp->hisauth.name,
4042 sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
4046 log(LOG_DEBUG, SPP_FMT "chap input(%s) "
4047 "<%s id=0x%x len=%d name=",
4049 sppp_state_name(sp->state[IDX_CHAP]),
4050 sppp_auth_type_name(PPP_CHAP, h->type),
4051 h->ident, ntohs (h->len));
4052 sppp_print_string((char*)name, name_len);
4053 log(-1, " value-size=%d value=", value_len);
4054 sppp_print_bytes(value, value_len);
4057 if (value_len != AUTHKEYLEN) {
4060 SPP_FMT "chap bad hash value length: "
4061 "%d bytes, should be %d\n",
4062 SPP_ARGS(ifp), value_len,
4068 MD5Update(&ctx, &h->ident, 1);
4069 MD5Update(&ctx, sp->hisauth.secret,
4070 sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
4071 MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
4072 MD5Final(digest, &ctx);
4074 #define FAILMSG "Failed..."
4075 #define SUCCMSG "Welcome!"
4077 if (value_len != sizeof digest ||
4078 bcmp(digest, value, value_len) != 0) {
4079 /* action scn, tld */
4080 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
4081 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4086 /* action sca, perhaps tlu */
4087 if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
4088 sp->state[IDX_CHAP] == STATE_OPENED)
4089 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
4090 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4092 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
4093 sppp_cp_change_state(&chap, sp, STATE_OPENED);
4099 /* Unknown CHAP packet type -- ignore. */
4101 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
4102 "<0x%x id=0x%xh len=%d",
4104 sppp_state_name(sp->state[IDX_CHAP]),
4105 h->type, h->ident, ntohs(h->len));
4106 sppp_print_bytes((u_char*)(h+1), len-4);
4115 sppp_chap_init(struct sppp *sp)
4117 /* Chap doesn't have STATE_INITIAL at all. */
4118 sp->state[IDX_CHAP] = STATE_CLOSED;
4119 sp->fail_counter[IDX_CHAP] = 0;
4120 sp->pp_seq[IDX_CHAP] = 0;
4121 sp->pp_rseq[IDX_CHAP] = 0;
4122 callout_init(&sp->timeout[IDX_CHAP]);
4126 sppp_chap_open(struct sppp *sp)
4128 if (sp->myauth.proto == PPP_CHAP &&
4129 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4130 /* we are authenticator for CHAP, start it */
4132 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4133 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4135 /* nothing to be done if we are peer, await a challenge */
4139 sppp_chap_close(struct sppp *sp)
4141 if (sp->state[IDX_CHAP] != STATE_CLOSED)
4142 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4146 sppp_chap_TO(void *cookie)
4148 struct sppp *sp = (struct sppp *)cookie;
4154 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
4156 sppp_state_name(sp->state[IDX_CHAP]),
4157 sp->rst_counter[IDX_CHAP]);
4159 if (--sp->rst_counter[IDX_CHAP] < 0)
4161 switch (sp->state[IDX_CHAP]) {
4162 case STATE_REQ_SENT:
4164 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4168 /* TO+ (or TO*) event */
4169 switch (sp->state[IDX_CHAP]) {
4172 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4174 case STATE_REQ_SENT:
4176 /* sppp_cp_change_state() will restart the timer */
4177 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4185 sppp_chap_tlu(struct sppp *sp)
4191 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4194 * Some broken CHAP implementations (Conware CoNet, firmware
4195 * 4.0.?) don't want to re-authenticate their CHAP once the
4196 * initial challenge-response exchange has taken place.
4197 * Provide for an option to avoid rechallenges.
4199 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
4201 * Compute the re-challenge timeout. This will yield
4202 * a number between 300 and 810 seconds.
4204 i = 300 + ((unsigned)(krandom() & 0xff00) >> 7);
4205 callout_reset(&sp->timeout[IDX_CHAP], i * hz, chap.TO, sp);
4210 SPP_FMT "chap %s, ",
4212 sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
4213 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
4214 log(-1, "next re-challenge in %d seconds\n", i);
4216 log(-1, "re-challenging suppressed\n");
4221 /* indicate to LCP that we need to be closed down */
4222 sp->lcp.protos |= (1 << IDX_CHAP);
4224 if (sp->pp_flags & PP_NEEDAUTH) {
4226 * Remote is authenticator, but his auth proto didn't
4227 * complete yet. Defer the transition to network
4237 * If we are already in phase network, we are done here. This
4238 * is the case if this is a dummy tlu event after a re-challenge.
4240 if (sp->pp_phase != PHASE_NETWORK)
4241 sppp_phase_network(sp);
4245 sppp_chap_tld(struct sppp *sp)
4250 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
4251 callout_stop(&sp->timeout[IDX_CHAP]);
4252 sp->lcp.protos &= ~(1 << IDX_CHAP);
4258 sppp_chap_scr(struct sppp *sp)
4263 /* Compute random challenge. */
4264 ch = (u_long *)sp->myauth.challenge;
4265 read_random(&seed, sizeof seed);
4266 ch[0] = seed ^ krandom();
4267 ch[1] = seed ^ krandom();
4268 ch[2] = seed ^ krandom();
4269 ch[3] = seed ^ krandom();
4272 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP];
4274 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
4275 sizeof clen, (const char *)&clen,
4276 (size_t)AUTHKEYLEN, sp->myauth.challenge,
4277 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4283 *--------------------------------------------------------------------------*
4285 * The PAP implementation. *
4287 *--------------------------------------------------------------------------*
4290 * For PAP, we need to keep a little state also if we are the peer, not the
4291 * authenticator. This is since we don't get a request to authenticate, but
4292 * have to repeatedly authenticate ourself until we got a response (or the
4293 * retry counter is expired).
4297 * Handle incoming PAP packets. */
4299 sppp_pap_input(struct sppp *sp, struct mbuf *m)
4302 struct lcp_header *h;
4304 u_char *name, *passwd, mlen;
4305 int name_len, passwd_len;
4308 * Malicious input might leave this uninitialized, so
4309 * init to an impossible value.
4313 len = m->m_pkthdr.len;
4317 SPP_FMT "pap invalid packet length: %d bytes\n",
4318 SPP_ARGS(ifp), len);
4321 h = mtod (m, struct lcp_header*);
4322 if (len > ntohs (h->len))
4323 len = ntohs (h->len);
4325 /* PAP request is my authproto */
4327 name = 1 + (u_char*)(h+1);
4328 name_len = name[-1];
4329 passwd = name + name_len + 1;
4330 if (name_len > len - 6 ||
4331 (passwd_len = passwd[-1]) > len - 6 - name_len) {
4333 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4334 "<%s id=0x%x len=%d",
4336 sppp_auth_type_name(PPP_PAP, h->type),
4337 h->ident, ntohs(h->len));
4338 sppp_print_bytes((u_char*)(h+1), len-4);
4344 log(LOG_DEBUG, SPP_FMT "pap input(%s) "
4345 "<%s id=0x%x len=%d name=",
4347 sppp_state_name(sp->state[IDX_PAP]),
4348 sppp_auth_type_name(PPP_PAP, h->type),
4349 h->ident, ntohs(h->len));
4350 sppp_print_string((char*)name, name_len);
4351 log(-1, " passwd=");
4352 sppp_print_string((char*)passwd, passwd_len);
4355 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) ||
4356 passwd_len != sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN) ||
4357 bcmp(name, sp->hisauth.name, name_len) != 0 ||
4358 bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
4359 /* action scn, tld */
4360 mlen = sizeof(FAILMSG) - 1;
4361 sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
4362 sizeof mlen, (const char *)&mlen,
4363 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4368 /* action sca, perhaps tlu */
4369 if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
4370 sp->state[IDX_PAP] == STATE_OPENED) {
4371 mlen = sizeof(SUCCMSG) - 1;
4372 sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
4373 sizeof mlen, (const char *)&mlen,
4374 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4377 if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
4378 sppp_cp_change_state(&pap, sp, STATE_OPENED);
4383 /* ack and nak are his authproto */
4385 callout_stop(&sp->pap_my_to);
4387 log(LOG_DEBUG, SPP_FMT "pap success",
4389 name = 1 + (u_char *)(h + 1);
4390 name_len = name[-1];
4391 if (len > 5 && name_len < len+4) {
4393 sppp_print_string(name, name_len);
4400 sp->pp_flags &= ~PP_NEEDAUTH;
4401 if (sp->myauth.proto == PPP_PAP &&
4402 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4403 (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
4405 * We are authenticator for PAP but didn't
4406 * complete yet. Leave it to tlu to proceed
4417 sppp_phase_network(sp);
4421 callout_stop(&sp->pap_my_to);
4423 log(LOG_INFO, SPP_FMT "pap failure",
4425 name = 1 + (u_char *)(h + 1);
4426 name_len = name[-1];
4427 if (len > 5 && name_len < len+4) {
4429 sppp_print_string(name, name_len);
4433 log(LOG_INFO, SPP_FMT "pap failure\n",
4435 /* await LCP shutdown by authenticator */
4439 /* Unknown PAP packet type -- ignore. */
4441 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4442 "<0x%x id=0x%x len=%d",
4444 h->type, h->ident, ntohs(h->len));
4445 sppp_print_bytes((u_char*)(h+1), len-4);
4454 sppp_pap_init(struct sppp *sp)
4456 /* PAP doesn't have STATE_INITIAL at all. */
4457 sp->state[IDX_PAP] = STATE_CLOSED;
4458 sp->fail_counter[IDX_PAP] = 0;
4459 sp->pp_seq[IDX_PAP] = 0;
4460 sp->pp_rseq[IDX_PAP] = 0;
4461 callout_init(&sp->timeout[IDX_PAP]);
4462 callout_init(&sp->pap_my_to);
4466 sppp_pap_open(struct sppp *sp)
4468 if (sp->hisauth.proto == PPP_PAP &&
4469 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4470 /* we are authenticator for PAP, start our timer */
4471 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4472 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4474 if (sp->myauth.proto == PPP_PAP) {
4475 /* we are peer, send a request, and start a timer */
4477 callout_reset(&sp->pap_my_to, sp->lcp.timeout,
4478 sppp_pap_my_TO, sp);
4483 sppp_pap_close(struct sppp *sp)
4485 if (sp->state[IDX_PAP] != STATE_CLOSED)
4486 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4490 * That's the timeout routine if we are authenticator. Since the
4491 * authenticator is basically passive in PAP, we can't do much here.
4494 sppp_pap_TO(void *cookie)
4496 struct sppp *sp = (struct sppp *)cookie;
4502 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
4504 sppp_state_name(sp->state[IDX_PAP]),
4505 sp->rst_counter[IDX_PAP]);
4507 if (--sp->rst_counter[IDX_PAP] < 0)
4509 switch (sp->state[IDX_PAP]) {
4510 case STATE_REQ_SENT:
4512 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4516 /* TO+ event, not very much we could do */
4517 switch (sp->state[IDX_PAP]) {
4518 case STATE_REQ_SENT:
4519 /* sppp_cp_change_state() will restart the timer */
4520 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4528 * That's the timeout handler if we are peer. Since the peer is active,
4529 * we need to retransmit our PAP request since it is apparently lost.
4530 * XXX We should impose a max counter.
4533 sppp_pap_my_TO(void *cookie)
4535 struct sppp *sp = (struct sppp *)cookie;
4539 log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
4546 sppp_pap_tlu(struct sppp *sp)
4550 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4553 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
4554 SPP_ARGS(ifp), pap.name);
4558 /* indicate to LCP that we need to be closed down */
4559 sp->lcp.protos |= (1 << IDX_PAP);
4561 if (sp->pp_flags & PP_NEEDAUTH) {
4563 * Remote is authenticator, but his auth proto didn't
4564 * complete yet. Defer the transition to network
4571 sppp_phase_network(sp);
4575 sppp_pap_tld(struct sppp *sp)
4580 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
4581 callout_stop(&sp->timeout[IDX_PAP]);
4582 callout_stop(&sp->pap_my_to);
4583 sp->lcp.protos &= ~(1 << IDX_PAP);
4589 sppp_pap_scr(struct sppp *sp)
4591 u_char idlen, pwdlen;
4593 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP];
4594 pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
4595 idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
4597 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
4598 sizeof idlen, (const char *)&idlen,
4599 (size_t)idlen, sp->myauth.name,
4600 sizeof pwdlen, (const char *)&pwdlen,
4601 (size_t)pwdlen, sp->myauth.secret,
4606 * Random miscellaneous functions.
4610 * Send a PAP or CHAP proto packet.
4612 * Varadic function, each of the elements for the ellipsis is of type
4613 * ``size_t mlen, const u_char *msg''. Processing will stop iff
4615 * NOTE: never declare variadic functions with types subject to type
4616 * promotion (i.e. u_char). This is asking for big trouble depending
4617 * on the architecture you are on...
4621 sppp_auth_send(const struct cp *cp, struct sppp *sp,
4622 unsigned int type, unsigned int id,
4626 struct ppp_header *h;
4627 struct lcp_header *lh;
4633 struct ifaltq_subque *ifsq;
4636 MGETHDR (m, MB_DONTWAIT, MT_DATA);
4639 m->m_pkthdr.rcvif = 0;
4641 h = mtod (m, struct ppp_header*);
4642 h->address = PPP_ALLSTATIONS; /* broadcast address */
4643 h->control = PPP_UI; /* Unnumbered Info */
4644 h->protocol = htons(cp->proto);
4646 lh = (struct lcp_header*)(h + 1);
4649 p = (u_char*) (lh+1);
4654 while ((mlen = (unsigned int)__va_arg(ap, size_t)) != 0) {
4655 msg = __va_arg(ap, const char *);
4657 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
4663 bcopy(msg, p, mlen);
4668 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
4669 lh->len = htons (LCP_HEADER_LEN + len);
4672 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
4673 SPP_ARGS(ifp), cp->name,
4674 sppp_auth_type_name(cp->proto, lh->type),
4675 lh->ident, ntohs(lh->len));
4676 sppp_print_bytes((u_char*) (lh+1), len);
4679 if (IF_QFULL (&sp->pp_cpq)) {
4680 IF_DROP (&sp->pp_fastq);
4682 IFNET_STAT_INC(ifp, oerrors, 1);
4684 IF_ENQUEUE (&sp->pp_cpq, m);
4685 ifsq = ifq_get_subq_default(&ifp->if_snd);
4686 if (!ifsq_is_oactive(ifsq))
4687 (*ifp->if_start) (ifp, ifsq);
4688 IFNET_STAT_INC(ifp, obytes, m->m_pkthdr.len + 3);
4692 * Send keepalive packets, every 10 seconds.
4695 sppp_keepalive(void *dummy)
4701 for (sp=spppq; sp; sp=sp->pp_next) {
4702 struct ifnet *ifp = &sp->pp_if;
4704 /* Keepalive mode disabled or channel down? */
4705 if (! (sp->pp_flags & PP_KEEPALIVE) ||
4706 ! (ifp->if_flags & IFF_RUNNING))
4709 /* No keepalive in PPP mode if LCP not opened yet. */
4710 if (sp->pp_mode != IFF_CISCO &&
4711 sp->pp_phase < PHASE_AUTHENTICATE)
4714 if (sp->pp_alivecnt == MAXALIVECNT) {
4715 /* No keepalive packets got. Stop the interface. */
4716 kprintf (SPP_FMT "down\n", SPP_ARGS(ifp));
4718 IF_DRAIN(&sp->pp_cpq);
4719 if (sp->pp_mode != IFF_CISCO) {
4721 /* Shut down the PPP link. */
4723 /* Initiate negotiation. XXX */
4727 ifnet_serialize_all(ifp);
4728 if (sp->pp_alivecnt <= MAXALIVECNT)
4730 if (sp->pp_mode == IFF_CISCO)
4731 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ,
4732 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]);
4733 else if (sp->pp_phase >= PHASE_AUTHENTICATE) {
4734 long nmagic = htonl (sp->lcp.magic);
4735 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP];
4736 sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
4737 sp->lcp.echoid, 4, &nmagic);
4739 ifnet_deserialize_all(ifp);
4741 callout_reset(&keepalive_timeout, hz * 10, sppp_keepalive, NULL);
4746 * Get both IP addresses.
4749 sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
4751 struct ifnet *ifp = &sp->pp_if;
4752 struct ifaddr_container *ifac;
4754 struct sockaddr_in *si, *sm;
4760 * Pick the first AF_INET address from the list,
4761 * aliases don't make any sense on a p2p link anyway.
4764 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
4766 if (ifa->ifa_addr->sa_family == AF_INET) {
4767 si = (struct sockaddr_in *)ifa->ifa_addr;
4768 sm = (struct sockaddr_in *)ifa->ifa_netmask;
4774 if (si && si->sin_addr.s_addr) {
4775 ssrc = si->sin_addr.s_addr;
4777 *srcmask = ntohl(sm->sin_addr.s_addr);
4780 si = (struct sockaddr_in *)ifa->ifa_dstaddr;
4781 if (si && si->sin_addr.s_addr)
4782 ddst = si->sin_addr.s_addr;
4785 if (dst) *dst = ntohl(ddst);
4786 if (src) *src = ntohl(ssrc);
4790 * Set my IP address. Must be called at splimp.
4793 sppp_set_ip_addr(struct sppp *sp, u_long src)
4796 struct ifaddr_container *ifac;
4797 struct ifaddr *ifa = NULL;
4798 struct sockaddr_in *si;
4799 struct in_ifaddr *ia;
4802 * Pick the first AF_INET address from the list,
4803 * aliases don't make any sense on a p2p link anyway.
4806 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
4808 if (ifa->ifa_addr->sa_family == AF_INET) {
4809 si = (struct sockaddr_in *)ifa->ifa_addr;
4815 if (ifac != NULL && si != NULL) {
4818 /* delete old route */
4819 error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
4822 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
4823 SPP_ARGS(ifp), error);
4827 in_iahash_remove(ia);
4829 /* set new address */
4830 si->sin_addr.s_addr = htonl(src);
4831 in_iahash_insert(ia);
4834 error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);
4837 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
4838 SPP_ARGS(ifp), error);
4845 * Get both IPv6 addresses.
4848 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst,
4849 struct in6_addr *srcmask)
4851 struct ifnet *ifp = &sp->pp_if;
4852 struct ifaddr_container *ifac;
4854 struct sockaddr_in6 *si, *sm;
4855 struct in6_addr ssrc, ddst;
4858 bzero(&ssrc, sizeof(ssrc));
4859 bzero(&ddst, sizeof(ddst));
4861 * Pick the first link-local AF_INET6 address from the list,
4862 * aliases don't make any sense on a p2p link anyway.
4865 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
4867 if (ifa->ifa_addr->sa_family == AF_INET6) {
4868 si = (struct sockaddr_in6 *)ifa->ifa_addr;
4869 sm = (struct sockaddr_in6 *)ifa->ifa_netmask;
4870 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr))
4875 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) {
4876 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc));
4878 bcopy(&sm->sin6_addr, srcmask,
4883 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
4884 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr))
4885 bcopy(&si->sin6_addr, &ddst, sizeof(ddst));
4889 bcopy(&ddst, dst, sizeof(*dst));
4891 bcopy(&ssrc, src, sizeof(*src));
4894 #ifdef IPV6CP_MYIFID_DYN
4896 * Generate random ifid.
4899 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr)
4905 * Set my IPv6 address. Must be called at splimp.
4908 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src)
4911 struct ifaddr_container *ifac;
4913 struct sockaddr_in6 *sin6;
4916 * Pick the first link-local AF_INET6 address from the list,
4917 * aliases don't make any sense on a p2p link anyway.
4921 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
4923 if (ifa->ifa_addr->sa_family == AF_INET6) {
4924 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
4925 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
4930 if (ifac != NULL && sin6 != NULL) {
4932 struct sockaddr_in6 new_sin6 = *sin6;
4934 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr));
4935 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1);
4936 if (debug && error) {
4937 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit "
4938 " failed, error=%d\n", SPP_ARGS(ifp), error);
4945 * Suggest a candidate address to be used by peer.
4948 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest)
4950 struct in6_addr myaddr;
4953 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
4955 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */
4957 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) {
4958 myaddr.s6_addr[14] ^= 0xff;
4959 myaddr.s6_addr[15] ^= 0xff;
4961 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff);
4962 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff);
4965 bcopy(&myaddr, suggest, sizeof(myaddr));
4970 sppp_params(struct sppp *sp, u_long cmd, void *data)
4973 struct ifreq *ifr = (struct ifreq *)data;
4974 struct spppreq *spr;
4977 spr = kmalloc(sizeof(struct spppreq), M_TEMP, M_INTWAIT);
4980 * ifr->ifr_data is supposed to point to a struct spppreq.
4981 * Check the cmd word first before attempting to fetch all the
4984 if ((subcmd = fuword(ifr->ifr_data)) == -1) {
4989 if (copyin((caddr_t)ifr->ifr_data, spr, sizeof(struct spppreq)) != 0) {
4995 case (u_long)SPPPIOGDEFS:
4996 if (cmd != SIOCGIFGENERIC) {
5001 * We copy over the entire current state, but clean
5002 * out some of the stuff we don't wanna pass up.
5003 * Remember, SIOCGIFGENERIC is unprotected, and can be
5004 * called by any user. No need to ever get PAP or
5005 * CHAP secrets back to userland anyway.
5007 spr->defs.pp_phase = sp->pp_phase;
5008 spr->defs.enable_vj = (sp->confflags & CONF_ENABLE_VJ) != 0;
5009 spr->defs.enable_ipv6 = (sp->confflags & CONF_ENABLE_IPV6) != 0;
5010 spr->defs.lcp = sp->lcp;
5011 spr->defs.ipcp = sp->ipcp;
5012 spr->defs.ipv6cp = sp->ipv6cp;
5013 spr->defs.myauth = sp->myauth;
5014 spr->defs.hisauth = sp->hisauth;
5015 bzero(spr->defs.myauth.secret, AUTHKEYLEN);
5016 bzero(spr->defs.myauth.challenge, AUTHKEYLEN);
5017 bzero(spr->defs.hisauth.secret, AUTHKEYLEN);
5018 bzero(spr->defs.hisauth.challenge, AUTHKEYLEN);
5020 * Fixup the LCP timeout value to milliseconds so
5021 * spppcontrol doesn't need to bother about the value
5022 * of "hz". We do the reverse calculation below when
5025 spr->defs.lcp.timeout = sp->lcp.timeout * 1000 / hz;
5026 rv = copyout(spr, (caddr_t)ifr->ifr_data,
5027 sizeof(struct spppreq));
5030 case (u_long)SPPPIOSDEFS:
5031 if (cmd != SIOCSIFGENERIC) {
5036 * We have a very specific idea of which fields we
5037 * allow being passed back from userland, so to not
5038 * clobber our current state. For one, we only allow
5039 * setting anything if LCP is in dead or establish
5040 * phase. Once the authentication negotiations
5041 * started, the authentication settings must not be
5042 * changed again. (The administrator can force an
5043 * ifconfig down in order to get LCP back into dead
5046 * Also, we only allow for authentication parameters to be
5049 * XXX Should allow to set or clear pp_flags.
5051 * Finally, if the respective authentication protocol to
5052 * be used is set differently than 0, but the secret is
5053 * passed as all zeros, we don't trash the existing secret.
5054 * This allows an administrator to change the system name
5055 * only without clobbering the secret (which he didn't get
5056 * back in a previous SPPPIOGDEFS call). However, the
5057 * secrets are cleared if the authentication protocol is
5059 if (sp->pp_phase != PHASE_DEAD &&
5060 sp->pp_phase != PHASE_ESTABLISH) {
5065 if ((spr->defs.myauth.proto != 0 && spr->defs.myauth.proto != PPP_PAP &&
5066 spr->defs.myauth.proto != PPP_CHAP) ||
5067 (spr->defs.hisauth.proto != 0 && spr->defs.hisauth.proto != PPP_PAP &&
5068 spr->defs.hisauth.proto != PPP_CHAP)) {
5073 if (spr->defs.myauth.proto == 0)
5074 /* resetting myauth */
5075 bzero(&sp->myauth, sizeof sp->myauth);
5077 /* setting/changing myauth */
5078 sp->myauth.proto = spr->defs.myauth.proto;
5079 bcopy(spr->defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
5080 if (spr->defs.myauth.secret[0] != '\0')
5081 bcopy(spr->defs.myauth.secret, sp->myauth.secret,
5084 if (spr->defs.hisauth.proto == 0)
5085 /* resetting hisauth */
5086 bzero(&sp->hisauth, sizeof sp->hisauth);
5088 /* setting/changing hisauth */
5089 sp->hisauth.proto = spr->defs.hisauth.proto;
5090 sp->hisauth.flags = spr->defs.hisauth.flags;
5091 bcopy(spr->defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
5092 if (spr->defs.hisauth.secret[0] != '\0')
5093 bcopy(spr->defs.hisauth.secret, sp->hisauth.secret,
5096 /* set LCP restart timer timeout */
5097 if (spr->defs.lcp.timeout != 0)
5098 sp->lcp.timeout = spr->defs.lcp.timeout * hz / 1000;
5099 /* set VJ enable and IPv6 disable flags */
5101 if (spr->defs.enable_vj)
5102 sp->confflags |= CONF_ENABLE_VJ;
5104 sp->confflags &= ~CONF_ENABLE_VJ;
5107 if (spr->defs.enable_ipv6)
5108 sp->confflags |= CONF_ENABLE_IPV6;
5110 sp->confflags &= ~CONF_ENABLE_IPV6;
5125 sppp_phase_network(struct sppp *sp)
5131 sp->pp_phase = PHASE_NETWORK;
5134 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
5135 sppp_phase_name(sp->pp_phase));
5137 /* Notify NCPs now. */
5138 for (i = 0; i < IDX_COUNT; i++)
5139 if ((cps[i])->flags & CP_NCP)
5142 /* Send Up events to all NCPs. */
5143 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
5144 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP))
5147 /* if no NCP is starting, all this was in vain, close down */
5148 sppp_lcp_check_and_close(sp);
5153 sppp_cp_type_name(u_char type)
5155 static char buf[12];
5157 case CONF_REQ: return "conf-req";
5158 case CONF_ACK: return "conf-ack";
5159 case CONF_NAK: return "conf-nak";
5160 case CONF_REJ: return "conf-rej";
5161 case TERM_REQ: return "term-req";
5162 case TERM_ACK: return "term-ack";
5163 case CODE_REJ: return "code-rej";
5164 case PROTO_REJ: return "proto-rej";
5165 case ECHO_REQ: return "echo-req";
5166 case ECHO_REPLY: return "echo-reply";
5167 case DISC_REQ: return "discard-req";
5169 ksnprintf (buf, sizeof(buf), "cp/0x%x", type);
5174 sppp_auth_type_name(u_short proto, u_char type)
5176 static char buf[12];
5180 case CHAP_CHALLENGE: return "challenge";
5181 case CHAP_RESPONSE: return "response";
5182 case CHAP_SUCCESS: return "success";
5183 case CHAP_FAILURE: return "failure";
5187 case PAP_REQ: return "req";
5188 case PAP_ACK: return "ack";
5189 case PAP_NAK: return "nak";
5192 ksnprintf (buf, sizeof(buf), "auth/0x%x", type);
5197 sppp_lcp_opt_name(u_char opt)
5199 static char buf[12];
5201 case LCP_OPT_MRU: return "mru";
5202 case LCP_OPT_ASYNC_MAP: return "async-map";
5203 case LCP_OPT_AUTH_PROTO: return "auth-proto";
5204 case LCP_OPT_QUAL_PROTO: return "qual-proto";
5205 case LCP_OPT_MAGIC: return "magic";
5206 case LCP_OPT_PROTO_COMP: return "proto-comp";
5207 case LCP_OPT_ADDR_COMP: return "addr-comp";
5209 ksnprintf (buf, sizeof(buf), "lcp/0x%x", opt);
5214 sppp_ipcp_opt_name(u_char opt)
5216 static char buf[12];
5218 case IPCP_OPT_ADDRESSES: return "addresses";
5219 case IPCP_OPT_COMPRESSION: return "compression";
5220 case IPCP_OPT_ADDRESS: return "address";
5222 ksnprintf (buf, sizeof(buf), "ipcp/0x%x", opt);
5228 sppp_ipv6cp_opt_name(u_char opt)
5230 static char buf[12];
5232 case IPV6CP_OPT_IFID: return "ifid";
5233 case IPV6CP_OPT_COMPRESSION: return "compression";
5235 ksprintf (buf, "0x%x", opt);
5241 sppp_state_name(int state)
5244 case STATE_INITIAL: return "initial";
5245 case STATE_STARTING: return "starting";
5246 case STATE_CLOSED: return "closed";
5247 case STATE_STOPPED: return "stopped";
5248 case STATE_CLOSING: return "closing";
5249 case STATE_STOPPING: return "stopping";
5250 case STATE_REQ_SENT: return "req-sent";
5251 case STATE_ACK_RCVD: return "ack-rcvd";
5252 case STATE_ACK_SENT: return "ack-sent";
5253 case STATE_OPENED: return "opened";
5259 sppp_phase_name(enum ppp_phase phase)
5262 case PHASE_DEAD: return "dead";
5263 case PHASE_ESTABLISH: return "establish";
5264 case PHASE_TERMINATE: return "terminate";
5265 case PHASE_AUTHENTICATE: return "authenticate";
5266 case PHASE_NETWORK: return "network";
5272 sppp_proto_name(u_short proto)
5274 static char buf[12];
5276 case PPP_LCP: return "lcp";
5277 case PPP_IPCP: return "ipcp";
5278 case PPP_PAP: return "pap";
5279 case PPP_CHAP: return "chap";
5280 case PPP_IPV6CP: return "ipv6cp";
5282 ksnprintf(buf, sizeof(buf), "proto/0x%x", (unsigned)proto);
5287 sppp_print_bytes(const u_char *p, u_short len)
5291 log(-1, " %s", hexncpy(p, len, hexstr, HEX_NCPYLEN(len), "-"));
5295 sppp_print_string(const char *p, u_short len)
5302 * Print only ASCII chars directly. RFC 1994 recommends
5303 * using only them, but we don't rely on it. */
5304 if (c < ' ' || c > '~')
5305 log(-1, "\\x%x", c);
5312 sppp_dotted_quad(u_long addr)
5315 ksprintf(s, "%d.%d.%d.%d",
5316 (int)((addr >> 24) & 0xff),
5317 (int)((addr >> 16) & 0xff),
5318 (int)((addr >> 8) & 0xff),
5319 (int)(addr & 0xff));
5324 sppp_strnlen(u_char *p, int max)
5328 for (len = 0; len < max && *p; ++p)
5333 /* a dummy, used to drop uninteresting events */
5335 sppp_null(struct sppp *unused)
5337 /* do just nothing */