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 $
21 * $DragonFly: src/sys/net/sppp/if_spppsubr.c,v 1.6 2003/11/09 02:22:36 dillon Exp $
24 #include <sys/param.h>
26 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
28 #include "opt_inet6.h"
34 # include "opt_inet.h"
35 # include "opt_inet6.h"
40 #include <sys/systm.h>
41 #include <sys/kernel.h>
42 #include <sys/module.h>
43 #include <sys/sockio.h>
44 #include <sys/socket.h>
45 #include <sys/syslog.h>
46 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
47 #include <sys/random.h>
49 #include <sys/malloc.h>
52 #if defined (__OpenBSD__)
59 #include <net/netisr.h>
60 #include <net/if_types.h>
61 #include <net/route.h>
62 #include <netinet/in.h>
63 #include <netinet/in_systm.h>
64 #include <netinet/ip.h>
65 #include <net/slcompress.h>
67 #if defined (__NetBSD__) || defined (__OpenBSD__)
68 #include <machine/cpu.h> /* XXX for softnet */
71 #include <machine/stdarg.h>
73 #include <netinet/in.h>
74 #include <netinet/in_systm.h>
75 #include <netinet/in_var.h>
78 #include <netinet/ip.h>
79 #include <netinet/tcp.h>
82 #if defined (__FreeBSD__) || defined (__OpenBSD__)
83 # include <netinet/if_ether.h>
85 # include <net/ethertypes.h>
89 #include <netproto/ipx/ipx.h>
90 #include <netproto/ipx/ipx_if.h>
95 #include <netns/ns_if.h>
100 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
101 # define UNTIMEOUT(fun, arg, handle) untimeout(fun, arg, handle)
102 # define TIMEOUT(fun, arg1, arg2, handle) handle = timeout(fun, arg1, arg2)
103 # define IOCTL_CMD_T u_long
105 # define UNTIMEOUT(fun, arg, handle) untimeout(fun, arg)
106 # define TIMEOUT(fun, arg1, arg2, handle) timeout(fun, arg1, arg2)
107 # define IOCTL_CMD_T int
110 #define MAXALIVECNT 3 /* max. alive packets */
113 * Interface flags that can be set in an ifconfig command.
115 * Setting link0 will make the link passive, i.e. it will be marked
116 * as being administrative openable, but won't be opened to begin
117 * with. Incoming calls will be answered, or subsequent calls with
118 * -link1 will cause the administrative open of the LCP layer.
120 * Setting link1 will cause the link to auto-dial only as packets
123 * Setting IFF_DEBUG will syslog the option negotiation and state
124 * transitions at level kern.debug. Note: all logs consistently look
127 * <if-name><unit>: <proto-name> <additional info...>
129 * with <if-name><unit> being something like "bppp0", and <proto-name>
130 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
133 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
134 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */
135 #define IFF_CISCO IFF_LINK2 /* auto-dial on output */
137 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
138 #define PPP_UI 0x03 /* Unnumbered Information */
139 #define PPP_IP 0x0021 /* Internet Protocol */
140 #define PPP_ISO 0x0023 /* ISO OSI Protocol */
141 #define PPP_XNS 0x0025 /* Xerox NS Protocol */
142 #define PPP_IPX 0x002b /* Novell IPX Protocol */
143 #define PPP_VJ_COMP 0x002d /* VJ compressed TCP/IP */
144 #define PPP_VJ_UCOMP 0x002f /* VJ uncompressed TCP/IP */
145 #define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */
146 #define PPP_LCP 0xc021 /* Link Control Protocol */
147 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
148 #define PPP_CHAP 0xc223 /* Challenge-Handshake Auth Protocol */
149 #define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */
150 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
152 #define CONF_REQ 1 /* PPP configure request */
153 #define CONF_ACK 2 /* PPP configure acknowledge */
154 #define CONF_NAK 3 /* PPP configure negative ack */
155 #define CONF_REJ 4 /* PPP configure reject */
156 #define TERM_REQ 5 /* PPP terminate request */
157 #define TERM_ACK 6 /* PPP terminate acknowledge */
158 #define CODE_REJ 7 /* PPP code reject */
159 #define PROTO_REJ 8 /* PPP protocol reject */
160 #define ECHO_REQ 9 /* PPP echo request */
161 #define ECHO_REPLY 10 /* PPP echo reply */
162 #define DISC_REQ 11 /* PPP discard request */
164 #define LCP_OPT_MRU 1 /* maximum receive unit */
165 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */
166 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */
167 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */
168 #define LCP_OPT_MAGIC 5 /* magic number */
169 #define LCP_OPT_RESERVED 6 /* reserved */
170 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */
171 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */
173 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */
174 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol (VJ) */
175 #define IPCP_OPT_ADDRESS 3 /* local IP address */
177 #define IPV6CP_OPT_IFID 1 /* interface identifier */
178 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */
180 #define IPCP_COMP_VJ 0x2d /* Code for VJ compression */
182 #define PAP_REQ 1 /* PAP name/password request */
183 #define PAP_ACK 2 /* PAP acknowledge */
184 #define PAP_NAK 3 /* PAP fail */
186 #define CHAP_CHALLENGE 1 /* CHAP challenge request */
187 #define CHAP_RESPONSE 2 /* CHAP challenge response */
188 #define CHAP_SUCCESS 3 /* CHAP response ok */
189 #define CHAP_FAILURE 4 /* CHAP response failed */
191 #define CHAP_MD5 5 /* hash algorithm - MD5 */
193 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */
194 #define CISCO_UNICAST 0x0f /* Cisco unicast address */
195 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
196 #define CISCO_ADDR_REQ 0 /* Cisco address request */
197 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */
198 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
200 /* states are named and numbered according to RFC 1661 */
201 #define STATE_INITIAL 0
202 #define STATE_STARTING 1
203 #define STATE_CLOSED 2
204 #define STATE_STOPPED 3
205 #define STATE_CLOSING 4
206 #define STATE_STOPPING 5
207 #define STATE_REQ_SENT 6
208 #define STATE_ACK_RCVD 7
209 #define STATE_ACK_SENT 8
210 #define STATE_OPENED 9
216 } __attribute__((__packed__));
217 #define PPP_HEADER_LEN sizeof (struct ppp_header)
223 } __attribute__((__packed__));
224 #define LCP_HEADER_LEN sizeof (struct lcp_header)
226 struct cisco_packet {
233 } __attribute__((__packed__));
234 #define CISCO_PACKET_LEN sizeof (struct cisco_packet)
237 * We follow the spelling and capitalization of RFC 1661 here, to make
238 * it easier comparing with the standard. Please refer to this RFC in
239 * case you can't make sense out of these abbreviation; it will also
240 * explain the semantics related to the various events and actions.
243 u_short proto; /* PPP control protocol number */
244 u_char protoidx; /* index into state table in struct sppp */
246 #define CP_LCP 0x01 /* this is the LCP */
247 #define CP_AUTH 0x02 /* this is an authentication protocol */
248 #define CP_NCP 0x04 /* this is a NCP */
249 #define CP_QUAL 0x08 /* this is a quality reporting protocol */
250 const char *name; /* name of this control protocol */
252 void (*Up)(struct sppp *sp);
253 void (*Down)(struct sppp *sp);
254 void (*Open)(struct sppp *sp);
255 void (*Close)(struct sppp *sp);
256 void (*TO)(void *sp);
257 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len);
258 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len);
259 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len);
261 void (*tlu)(struct sppp *sp);
262 void (*tld)(struct sppp *sp);
263 void (*tls)(struct sppp *sp);
264 void (*tlf)(struct sppp *sp);
265 void (*scr)(struct sppp *sp);
268 static struct sppp *spppq;
269 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
270 static struct callout_handle keepalive_ch;
273 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
274 #define SPP_FMT "%s%d: "
275 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit
277 #define SPP_FMT "%s: "
278 #define SPP_ARGS(ifp) (ifp)->if_xname
283 * The following disgusting hack gets around the problem that IP TOS
284 * can't be set yet. We want to put "interactive" traffic on a high
285 * priority queue. To decide if traffic is interactive, we check that
286 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
288 * XXX is this really still necessary? - joerg -
290 static u_short interactive_ports[8] = {
294 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
297 /* almost every function needs these */
299 struct ifnet *ifp = &sp->pp_if; \
300 int debug = ifp->if_flags & IFF_DEBUG
302 static int sppp_output(struct ifnet *ifp, struct mbuf *m,
303 struct sockaddr *dst, struct rtentry *rt);
305 static void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2);
306 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m);
308 static void sppp_cp_input(const struct cp *cp, struct sppp *sp,
310 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
311 u_char ident, u_short len, void *data);
312 /* static void sppp_cp_timeout(void *arg); */
313 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp,
315 static void sppp_auth_send(const struct cp *cp,
316 struct sppp *sp, unsigned int type, unsigned int id,
319 static void sppp_up_event(const struct cp *cp, struct sppp *sp);
320 static void sppp_down_event(const struct cp *cp, struct sppp *sp);
321 static void sppp_open_event(const struct cp *cp, struct sppp *sp);
322 static void sppp_close_event(const struct cp *cp, struct sppp *sp);
323 static void sppp_to_event(const struct cp *cp, struct sppp *sp);
325 static void sppp_null(struct sppp *sp);
327 static void sppp_lcp_init(struct sppp *sp);
328 static void sppp_lcp_up(struct sppp *sp);
329 static void sppp_lcp_down(struct sppp *sp);
330 static void sppp_lcp_open(struct sppp *sp);
331 static void sppp_lcp_close(struct sppp *sp);
332 static void sppp_lcp_TO(void *sp);
333 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
334 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
335 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
336 static void sppp_lcp_tlu(struct sppp *sp);
337 static void sppp_lcp_tld(struct sppp *sp);
338 static void sppp_lcp_tls(struct sppp *sp);
339 static void sppp_lcp_tlf(struct sppp *sp);
340 static void sppp_lcp_scr(struct sppp *sp);
341 static void sppp_lcp_check_and_close(struct sppp *sp);
342 static int sppp_ncp_check(struct sppp *sp);
344 static void sppp_ipcp_init(struct sppp *sp);
345 static void sppp_ipcp_up(struct sppp *sp);
346 static void sppp_ipcp_down(struct sppp *sp);
347 static void sppp_ipcp_open(struct sppp *sp);
348 static void sppp_ipcp_close(struct sppp *sp);
349 static void sppp_ipcp_TO(void *sp);
350 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
351 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
352 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
353 static void sppp_ipcp_tlu(struct sppp *sp);
354 static void sppp_ipcp_tld(struct sppp *sp);
355 static void sppp_ipcp_tls(struct sppp *sp);
356 static void sppp_ipcp_tlf(struct sppp *sp);
357 static void sppp_ipcp_scr(struct sppp *sp);
359 static void sppp_ipv6cp_init(struct sppp *sp);
360 static void sppp_ipv6cp_up(struct sppp *sp);
361 static void sppp_ipv6cp_down(struct sppp *sp);
362 static void sppp_ipv6cp_open(struct sppp *sp);
363 static void sppp_ipv6cp_close(struct sppp *sp);
364 static void sppp_ipv6cp_TO(void *sp);
365 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len);
366 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
367 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
368 static void sppp_ipv6cp_tlu(struct sppp *sp);
369 static void sppp_ipv6cp_tld(struct sppp *sp);
370 static void sppp_ipv6cp_tls(struct sppp *sp);
371 static void sppp_ipv6cp_tlf(struct sppp *sp);
372 static void sppp_ipv6cp_scr(struct sppp *sp);
374 static void sppp_pap_input(struct sppp *sp, struct mbuf *m);
375 static void sppp_pap_init(struct sppp *sp);
376 static void sppp_pap_open(struct sppp *sp);
377 static void sppp_pap_close(struct sppp *sp);
378 static void sppp_pap_TO(void *sp);
379 static void sppp_pap_my_TO(void *sp);
380 static void sppp_pap_tlu(struct sppp *sp);
381 static void sppp_pap_tld(struct sppp *sp);
382 static void sppp_pap_scr(struct sppp *sp);
384 static void sppp_chap_input(struct sppp *sp, struct mbuf *m);
385 static void sppp_chap_init(struct sppp *sp);
386 static void sppp_chap_open(struct sppp *sp);
387 static void sppp_chap_close(struct sppp *sp);
388 static void sppp_chap_TO(void *sp);
389 static void sppp_chap_tlu(struct sppp *sp);
390 static void sppp_chap_tld(struct sppp *sp);
391 static void sppp_chap_scr(struct sppp *sp);
393 static const char *sppp_auth_type_name(u_short proto, u_char type);
394 static const char *sppp_cp_type_name(u_char type);
395 static const char *sppp_dotted_quad(u_long addr);
396 static const char *sppp_ipcp_opt_name(u_char opt);
398 static const char *sppp_ipv6cp_opt_name(u_char opt);
400 static const char *sppp_lcp_opt_name(u_char opt);
401 static const char *sppp_phase_name(enum ppp_phase phase);
402 static const char *sppp_proto_name(u_short proto);
403 static const char *sppp_state_name(int state);
404 static int sppp_params(struct sppp *sp, u_long cmd, void *data);
405 static int sppp_strnlen(u_char *p, int max);
406 static void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst,
408 static void sppp_keepalive(void *dummy);
409 static void sppp_phase_network(struct sppp *sp);
410 static void sppp_print_bytes(const u_char *p, u_short len);
411 static void sppp_print_string(const char *p, u_short len);
412 static void sppp_qflush(struct ifqueue *ifq);
413 static void sppp_set_ip_addr(struct sppp *sp, u_long src);
415 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src,
416 struct in6_addr *dst, struct in6_addr *srcmask);
417 #ifdef IPV6CP_MYIFID_DYN
418 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src);
419 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src);
421 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src);
424 /* our control protocol descriptors */
425 static const struct cp lcp = {
426 PPP_LCP, IDX_LCP, CP_LCP, "lcp",
427 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close,
428 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak,
429 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf,
433 static const struct cp ipcp = {
434 PPP_IPCP, IDX_IPCP, CP_NCP, "ipcp",
435 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close,
436 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak,
437 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf,
441 static const struct cp ipv6cp = {
442 PPP_IPV6CP, IDX_IPV6CP,
443 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/
449 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close,
450 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak,
451 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf,
455 static const struct cp pap = {
456 PPP_PAP, IDX_PAP, CP_AUTH, "pap",
457 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close,
458 sppp_pap_TO, 0, 0, 0,
459 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null,
463 static const struct cp chap = {
464 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap",
465 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close,
466 sppp_chap_TO, 0, 0, 0,
467 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null,
471 static const struct cp *cps[IDX_COUNT] = {
473 &ipcp, /* IDX_IPCP */
474 &ipv6cp, /* IDX_IPV6CP */
476 &chap, /* IDX_CHAP */
480 sppp_modevent(module_t mod, int type, void *unused)
493 static moduledata_t spppmod = {
498 MODULE_VERSION(sppp, 1);
499 DECLARE_MODULE(sppp, spppmod, SI_SUB_DRIVERS, SI_ORDER_ANY);
502 * Exported functions, comprising our interface to the lower layer.
506 * Process the received packet.
509 sppp_input(struct ifnet *ifp, struct mbuf *m)
511 struct ppp_header *h;
513 struct sppp *sp = (struct sppp *)ifp;
515 int hlen, vjlen, do_account = 0;
516 int debug = ifp->if_flags & IFF_DEBUG;
518 if (ifp->if_flags & IFF_UP)
519 /* Count received bytes, add FCS and one flag */
520 ifp->if_ibytes += m->m_pkthdr.len + 3;
522 if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
523 /* Too small packet, drop it. */
526 SPP_FMT "input packet is too small, %d bytes\n",
527 SPP_ARGS(ifp), m->m_pkthdr.len);
536 /* Get PPP header. */
537 h = mtod (m, struct ppp_header*);
538 m_adj (m, PPP_HEADER_LEN);
540 switch (h->address) {
541 case PPP_ALLSTATIONS:
542 if (h->control != PPP_UI)
544 if (sp->pp_mode == IFF_CISCO) {
547 SPP_FMT "PPP packet in Cisco mode "
548 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
550 h->address, h->control, ntohs(h->protocol));
553 switch (ntohs (h->protocol)) {
557 SPP_FMT "rejecting protocol "
558 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
560 h->address, h->control, ntohs(h->protocol));
561 if (sp->state[IDX_LCP] == STATE_OPENED)
562 sppp_cp_send (sp, PPP_LCP, PROTO_REJ,
563 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2,
568 sppp_cp_input(&lcp, sp, m);
572 if (sp->pp_phase >= PHASE_AUTHENTICATE)
573 sppp_pap_input(sp, m);
577 if (sp->pp_phase >= PHASE_AUTHENTICATE)
578 sppp_chap_input(sp, m);
583 if (sp->pp_phase == PHASE_NETWORK)
584 sppp_cp_input(&ipcp, sp, m);
588 if (sp->state[IDX_IPCP] == STATE_OPENED) {
594 if (sp->state[IDX_IPCP] == STATE_OPENED) {
596 sl_uncompress_tcp_core(mtod(m, u_char *),
600 &iphdr, &hlen)) <= 0) {
603 SPP_FMT "VJ uncompress failed on compressed packet\n",
609 * Trim the VJ header off the packet, and prepend
610 * the uncompressed IP header (which will usually
611 * end up in two chained mbufs since there's not
612 * enough leading space in the existing mbuf).
615 M_PREPEND(m, hlen, M_DONTWAIT);
618 bcopy(iphdr, mtod(m, u_char *), hlen);
625 if (sp->state[IDX_IPCP] == STATE_OPENED) {
626 if (sl_uncompress_tcp_core(mtod(m, u_char *),
628 TYPE_UNCOMPRESSED_TCP,
630 &iphdr, &hlen) != 0) {
633 SPP_FMT "VJ uncompress failed on uncompressed packet\n",
644 if (sp->pp_phase == PHASE_NETWORK)
645 sppp_cp_input(&ipv6cp, sp, m);
650 if (sp->state[IDX_IPV6CP] == STATE_OPENED) {
658 /* IPX IPXCP not implemented yet */
659 if (sp->pp_phase == PHASE_NETWORK) {
667 /* XNS IDPCP not implemented yet */
668 if (sp->pp_phase == PHASE_NETWORK) {
676 case CISCO_MULTICAST:
678 /* Don't check the control field here (RFC 1547). */
679 if (sp->pp_mode != IFF_CISCO) {
682 SPP_FMT "Cisco packet in PPP mode "
683 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
685 h->address, h->control, ntohs(h->protocol));
688 switch (ntohs (h->protocol)) {
692 case CISCO_KEEPALIVE:
693 sppp_cisco_input ((struct sppp*) ifp, m);
722 default: /* Invalid PPP packet. */
726 SPP_FMT "invalid input packet "
727 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
729 h->address, h->control, ntohs(h->protocol));
733 if (! (ifp->if_flags & IFF_UP) || isr < 0)
738 netisr_dispatch(isr, m);
741 * Do only account for network packets, not for control
742 * packets. This is used by some subsystems to detect
745 sp->pp_last_recv = time_second;
749 * Enqueue transmit packet.
752 sppp_output(struct ifnet *ifp, struct mbuf *m,
753 struct sockaddr *dst, struct rtentry *rt)
755 struct sppp *sp = (struct sppp*) ifp;
756 struct ppp_header *h;
757 struct ifqueue *ifq = NULL;
759 int ipproto = PPP_IP;
760 int debug = ifp->if_flags & IFF_DEBUG;
764 if ((ifp->if_flags & IFF_UP) == 0 ||
765 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) {
774 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) {
779 * Hack to prevent the initialization-time generated
780 * IPv6 multicast packet to erroneously cause a
781 * dialout event in case IPv6 has been
782 * administratively disabled on that interface.
784 if (dst->sa_family == AF_INET6 &&
785 !(sp->confflags & CONF_ENABLE_IPV6))
789 * Interface is not yet running, but auto-dial. Need
790 * to start LCP for it.
792 ifp->if_flags |= IFF_RUNNING;
800 if (dst->sa_family == AF_INET) {
801 /* XXX Check mbuf length here? */
802 struct ip *ip = mtod (m, struct ip*);
803 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
806 * When using dynamic local IP address assignment by using
807 * 0.0.0.0 as a local address, the first TCP session will
808 * not connect because the local TCP checksum is computed
809 * using 0.0.0.0 which will later become our real IP address
810 * so the TCP checksum computed at the remote end will
811 * become invalid. So we
812 * - don't let packets with src ip addr 0 thru
813 * - we flag TCP packets with src ip 0 as an error
816 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */
820 if(ip->ip_p == IPPROTO_TCP)
821 return(EADDRNOTAVAIL);
827 * Put low delay, telnet, rlogin and ftp control packets
828 * in front of the queue.
830 if (IF_QFULL (&sp->pp_fastq))
832 else if (ip->ip_tos & IPTOS_LOWDELAY)
834 else if (m->m_len < sizeof *ip + sizeof *tcp)
836 else if (ip->ip_p != IPPROTO_TCP)
838 else if (INTERACTIVE (ntohs (tcp->th_sport)))
840 else if (INTERACTIVE (ntohs (tcp->th_dport)))
844 * Do IP Header compression
846 if (sp->pp_mode != IFF_CISCO && (sp->ipcp.flags & IPCP_VJ) &&
847 ip->ip_p == IPPROTO_TCP)
848 switch (sl_compress_tcp(m, ip, sp->pp_comp,
849 sp->ipcp.compress_cid)) {
850 case TYPE_COMPRESSED_TCP:
851 ipproto = PPP_VJ_COMP;
853 case TYPE_UNCOMPRESSED_TCP:
854 ipproto = PPP_VJ_UCOMP;
868 if (dst->sa_family == AF_INET6) {
869 /* XXX do something tricky here? */
874 * Prepend general data packet PPP header. For now, IP only.
876 M_PREPEND (m, PPP_HEADER_LEN, M_DONTWAIT);
879 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
886 * May want to check size of packet
887 * (albeit due to the implementation it's always enough)
889 h = mtod (m, struct ppp_header*);
890 if (sp->pp_mode == IFF_CISCO) {
891 h->address = CISCO_UNICAST; /* unicast address */
894 h->address = PPP_ALLSTATIONS; /* broadcast address */
895 h->control = PPP_UI; /* Unnumbered Info */
898 switch (dst->sa_family) {
900 case AF_INET: /* Internet Protocol */
901 if (sp->pp_mode == IFF_CISCO)
902 h->protocol = htons (ETHERTYPE_IP);
905 * Don't choke with an ENETDOWN early. It's
906 * possible that we just started dialing out,
907 * so don't drop the packet immediately. If
908 * we notice that we run out of buffer space
909 * below, we will however remember that we are
910 * not ready to carry IP packets, and return
911 * ENETDOWN, as opposed to ENOBUFS.
913 h->protocol = htons(ipproto);
914 if (sp->state[IDX_IPCP] != STATE_OPENED)
920 case AF_INET6: /* Internet Protocol */
921 if (sp->pp_mode == IFF_CISCO)
922 h->protocol = htons (ETHERTYPE_IPV6);
925 * Don't choke with an ENETDOWN early. It's
926 * possible that we just started dialing out,
927 * so don't drop the packet immediately. If
928 * we notice that we run out of buffer space
929 * below, we will however remember that we are
930 * not ready to carry IP packets, and return
931 * ENETDOWN, as opposed to ENOBUFS.
933 h->protocol = htons(PPP_IPV6);
934 if (sp->state[IDX_IPV6CP] != STATE_OPENED)
940 case AF_NS: /* Xerox NS Protocol */
941 h->protocol = htons (sp->pp_mode == IFF_CISCO ?
942 ETHERTYPE_NS : PPP_XNS);
946 case AF_IPX: /* Novell IPX Protocol */
947 h->protocol = htons (sp->pp_mode == IFF_CISCO ?
948 ETHERTYPE_IPX : PPP_IPX);
955 return (EAFNOSUPPORT);
959 * Queue message on interface, and start output if interface
962 if (IF_QFULL (ifq)) {
963 IF_DROP (&ifp->if_snd);
967 return (rv? rv: ENOBUFS);
970 if (! (ifp->if_flags & IFF_OACTIVE))
971 (*ifp->if_start) (ifp);
974 * Count output packets and bytes.
975 * The packet length includes header, FCS and 1 flag,
976 * according to RFC 1333.
978 ifp->if_obytes += m->m_pkthdr.len + 3;
981 * Unlike in sppp_input(), we can always bump the timestamp
982 * here since sppp_output() is only called on behalf of
983 * network-layer traffic; control-layer traffic is handled
986 sp->pp_last_sent = time_second;
991 sppp_attach(struct ifnet *ifp)
993 struct sppp *sp = (struct sppp*) ifp;
995 /* Initialize keepalive handler. */
997 TIMEOUT(sppp_keepalive, 0, hz * 10, keepalive_ch);
999 /* Insert new entry into the keepalive list. */
1000 sp->pp_next = spppq;
1003 sp->pp_if.if_mtu = PP_MTU;
1004 sp->pp_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
1005 sp->pp_if.if_type = IFT_PPP;
1006 sp->pp_if.if_output = sppp_output;
1008 sp->pp_flags = PP_KEEPALIVE;
1010 sp->pp_if.if_snd.ifq_maxlen = 32;
1011 sp->pp_fastq.ifq_maxlen = 32;
1012 sp->pp_cpq.ifq_maxlen = 20;
1014 sp->pp_alivecnt = 0;
1015 bzero(&sp->pp_seq[0], sizeof(sp->pp_seq));
1016 bzero(&sp->pp_rseq[0], sizeof(sp->pp_rseq));
1017 sp->pp_phase = PHASE_DEAD;
1019 sp->pp_down = lcp.Down;
1020 sp->pp_last_recv = sp->pp_last_sent = time_second;
1023 sp->confflags |= CONF_ENABLE_VJ;
1026 sp->confflags |= CONF_ENABLE_IPV6;
1028 sp->pp_comp = malloc(sizeof(struct slcompress), M_TEMP, M_WAIT);
1029 sl_compress_init(sp->pp_comp, -1);
1032 sppp_ipv6cp_init(sp);
1038 sppp_detach(struct ifnet *ifp)
1040 struct sppp **q, *p, *sp = (struct sppp*) ifp;
1043 /* Remove the entry from the keepalive list. */
1044 for (q = &spppq; (p = *q); q = &p->pp_next)
1050 /* Stop keepalive handler. */
1052 UNTIMEOUT(sppp_keepalive, 0, keepalive_ch);
1054 for (i = 0; i < IDX_COUNT; i++)
1055 UNTIMEOUT((cps[i])->TO, (void *)sp, sp->ch[i]);
1056 UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
1060 * Flush the interface output queue.
1063 sppp_flush(struct ifnet *ifp)
1065 struct sppp *sp = (struct sppp*) ifp;
1067 sppp_qflush (&sp->pp_if.if_snd);
1068 sppp_qflush (&sp->pp_fastq);
1069 sppp_qflush (&sp->pp_cpq);
1073 * Check if the output queue is empty.
1076 sppp_isempty(struct ifnet *ifp)
1078 struct sppp *sp = (struct sppp*) ifp;
1082 empty = !sp->pp_fastq.ifq_head && !sp->pp_cpq.ifq_head &&
1083 !sp->pp_if.if_snd.ifq_head;
1089 * Get next packet to send.
1092 sppp_dequeue(struct ifnet *ifp)
1094 struct sppp *sp = (struct sppp*) ifp;
1100 * Process only the control protocol queue until we have at
1101 * least one NCP open.
1103 * Do always serve all three queues in Cisco mode.
1105 IF_DEQUEUE(&sp->pp_cpq, m);
1107 (sppp_ncp_check(sp) || sp->pp_mode == IFF_CISCO)) {
1108 IF_DEQUEUE(&sp->pp_fastq, m);
1110 IF_DEQUEUE (&sp->pp_if.if_snd, m);
1117 * Pick the next packet, do not remove it from the queue.
1120 sppp_pick(struct ifnet *ifp)
1122 struct sppp *sp = (struct sppp*)ifp;
1128 m = sp->pp_cpq.ifq_head;
1130 (sp->pp_phase == PHASE_NETWORK || sp->pp_mode == IFF_CISCO))
1131 if ((m = sp->pp_fastq.ifq_head) == NULL)
1132 m = sp->pp_if.if_snd.ifq_head;
1138 * Process an ioctl request. Called on low priority level.
1141 sppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
1143 struct ifreq *ifr = (struct ifreq*) data;
1144 struct sppp *sp = (struct sppp*) ifp;
1145 int s, rv, going_up, going_down, newmode;
1151 case SIOCSIFDSTADDR:
1155 /* set the interface "up" when assigning an IP address */
1156 ifp->if_flags |= IFF_UP;
1157 /* fall through... */
1160 going_up = ifp->if_flags & IFF_UP &&
1161 (ifp->if_flags & IFF_RUNNING) == 0;
1162 going_down = (ifp->if_flags & IFF_UP) == 0 &&
1163 ifp->if_flags & IFF_RUNNING;
1165 newmode = ifp->if_flags & IFF_PASSIVE;
1167 newmode = ifp->if_flags & IFF_AUTO;
1169 newmode = ifp->if_flags & IFF_CISCO;
1170 ifp->if_flags &= ~(IFF_PASSIVE | IFF_AUTO | IFF_CISCO);
1171 ifp->if_flags |= newmode;
1173 if (newmode != sp->pp_mode) {
1176 going_up = ifp->if_flags & IFF_RUNNING;
1180 if (sp->pp_mode != IFF_CISCO)
1182 else if (sp->pp_tlf)
1185 ifp->if_flags &= ~IFF_RUNNING;
1186 sp->pp_mode = newmode;
1190 if (sp->pp_mode != IFF_CISCO)
1192 sp->pp_mode = newmode;
1193 if (sp->pp_mode == 0) {
1194 ifp->if_flags |= IFF_RUNNING;
1197 if (sp->pp_mode == IFF_CISCO) {
1200 ifp->if_flags |= IFF_RUNNING;
1208 #define ifr_mtu ifr_metric
1211 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru)
1213 ifp->if_mtu = ifr->ifr_mtu;
1218 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru)
1220 ifp->if_mtu = *(short*)data;
1225 ifr->ifr_mtu = ifp->if_mtu;
1230 *(short*)data = ifp->if_mtu;
1237 case SIOCGIFGENERIC:
1238 case SIOCSIFGENERIC:
1239 rv = sppp_params(sp, cmd, data);
1250 * Cisco framing implementation.
1254 * Handle incoming Cisco keepalive protocol packets.
1257 sppp_cisco_input(struct sppp *sp, struct mbuf *m)
1260 struct cisco_packet *h;
1263 if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
1266 SPP_FMT "cisco invalid packet length: %d bytes\n",
1267 SPP_ARGS(ifp), m->m_pkthdr.len);
1270 h = mtod (m, struct cisco_packet*);
1273 SPP_FMT "cisco input: %d bytes "
1274 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1275 SPP_ARGS(ifp), m->m_pkthdr.len,
1276 (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel,
1277 (u_int)h->time0, (u_int)h->time1);
1278 switch (ntohl (h->type)) {
1281 addlog(SPP_FMT "cisco unknown packet type: 0x%lx\n",
1282 SPP_ARGS(ifp), (u_long)ntohl (h->type));
1284 case CISCO_ADDR_REPLY:
1285 /* Reply on address request, ignore */
1287 case CISCO_KEEPALIVE_REQ:
1288 sp->pp_alivecnt = 0;
1289 sp->pp_rseq[IDX_LCP] = ntohl (h->par1);
1290 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) {
1291 /* Local and remote sequence numbers are equal.
1292 * Probably, the line is in loopback mode. */
1293 if (sp->pp_loopcnt >= MAXALIVECNT) {
1294 printf (SPP_FMT "loopback\n",
1297 if (ifp->if_flags & IFF_UP) {
1299 sppp_qflush (&sp->pp_cpq);
1304 /* Generate new local sequence number */
1305 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
1306 sp->pp_seq[IDX_LCP] = random();
1308 sp->pp_seq[IDX_LCP] ^= time.tv_sec ^ time.tv_usec;
1313 if (! (ifp->if_flags & IFF_UP) &&
1314 (ifp->if_flags & IFF_RUNNING)) {
1316 printf (SPP_FMT "up\n", SPP_ARGS(ifp));
1319 case CISCO_ADDR_REQ:
1320 sppp_get_ip_addrs(sp, &me, 0, &mymask);
1322 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
1328 * Send Cisco keepalive packet.
1331 sppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
1334 struct ppp_header *h;
1335 struct cisco_packet *ch;
1337 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
1340 u_long t = (time.tv_sec - boottime.tv_sec) * 1000;
1343 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
1344 getmicrouptime(&tv);
1347 MGETHDR (m, M_DONTWAIT, MT_DATA);
1350 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
1351 m->m_pkthdr.rcvif = 0;
1353 h = mtod (m, struct ppp_header*);
1354 h->address = CISCO_MULTICAST;
1356 h->protocol = htons (CISCO_KEEPALIVE);
1358 ch = (struct cisco_packet*) (h + 1);
1359 ch->type = htonl (type);
1360 ch->par1 = htonl (par1);
1361 ch->par2 = htonl (par2);
1364 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
1365 ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
1366 ch->time1 = htons ((u_short) tv.tv_sec);
1368 ch->time0 = htons ((u_short) (t >> 16));
1369 ch->time1 = htons ((u_short) t);
1374 SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1375 SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1,
1376 (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
1378 if (IF_QFULL (&sp->pp_cpq)) {
1379 IF_DROP (&sp->pp_fastq);
1380 IF_DROP (&ifp->if_snd);
1383 IF_ENQUEUE (&sp->pp_cpq, m);
1384 if (! (ifp->if_flags & IFF_OACTIVE))
1385 (*ifp->if_start) (ifp);
1386 ifp->if_obytes += m->m_pkthdr.len + 3;
1390 * PPP protocol implementation.
1394 * Send PPP control protocol packet.
1397 sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
1398 u_char ident, u_short len, void *data)
1401 struct ppp_header *h;
1402 struct lcp_header *lh;
1405 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
1406 len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
1407 MGETHDR (m, M_DONTWAIT, MT_DATA);
1410 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
1411 m->m_pkthdr.rcvif = 0;
1413 h = mtod (m, struct ppp_header*);
1414 h->address = PPP_ALLSTATIONS; /* broadcast address */
1415 h->control = PPP_UI; /* Unnumbered Info */
1416 h->protocol = htons (proto); /* Link Control Protocol */
1418 lh = (struct lcp_header*) (h + 1);
1421 lh->len = htons (LCP_HEADER_LEN + len);
1423 bcopy (data, lh+1, len);
1426 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
1428 sppp_proto_name(proto),
1429 sppp_cp_type_name (lh->type), lh->ident,
1431 sppp_print_bytes ((u_char*) (lh+1), len);
1434 if (IF_QFULL (&sp->pp_cpq)) {
1435 IF_DROP (&sp->pp_fastq);
1436 IF_DROP (&ifp->if_snd);
1440 IF_ENQUEUE (&sp->pp_cpq, m);
1441 if (! (ifp->if_flags & IFF_OACTIVE))
1442 (*ifp->if_start) (ifp);
1443 ifp->if_obytes += m->m_pkthdr.len + 3;
1447 * Handle incoming PPP control protocol packets.
1450 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
1453 struct lcp_header *h;
1454 int len = m->m_pkthdr.len;
1461 SPP_FMT "%s invalid packet length: %d bytes\n",
1462 SPP_ARGS(ifp), cp->name, len);
1465 h = mtod (m, struct lcp_header*);
1468 SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
1469 SPP_ARGS(ifp), cp->name,
1470 sppp_state_name(sp->state[cp->protoidx]),
1471 sppp_cp_type_name (h->type), h->ident, ntohs (h->len));
1472 sppp_print_bytes ((u_char*) (h+1), len-4);
1475 if (len > ntohs (h->len))
1476 len = ntohs (h->len);
1477 p = (u_char *)(h + 1);
1482 addlog(SPP_FMT "%s invalid conf-req length %d\n",
1483 SPP_ARGS(ifp), cp->name,
1488 /* handle states where RCR doesn't get a SCA/SCN */
1489 switch (sp->state[cp->protoidx]) {
1491 case STATE_STOPPING:
1494 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
1498 rv = (cp->RCR)(sp, h, len);
1499 switch (sp->state[cp->protoidx]) {
1503 /* fall through... */
1504 case STATE_ACK_SENT:
1505 case STATE_REQ_SENT:
1507 * sppp_cp_change_state() have the side effect of
1508 * restarting the timeouts. We want to avoid that
1509 * if the state don't change, otherwise we won't
1510 * ever timeout and resend a configuration request
1513 if (sp->state[cp->protoidx] == (rv ? STATE_ACK_SENT:
1516 sppp_cp_change_state(cp, sp, rv?
1517 STATE_ACK_SENT: STATE_REQ_SENT);
1520 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1522 sppp_cp_change_state(cp, sp, rv?
1523 STATE_ACK_SENT: STATE_REQ_SENT);
1525 case STATE_ACK_RCVD:
1527 sppp_cp_change_state(cp, sp, STATE_OPENED);
1529 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1534 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1537 printf(SPP_FMT "%s illegal %s in state %s\n",
1538 SPP_ARGS(ifp), cp->name,
1539 sppp_cp_type_name(h->type),
1540 sppp_state_name(sp->state[cp->protoidx]));
1545 if (h->ident != sp->confid[cp->protoidx]) {
1547 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1548 SPP_ARGS(ifp), cp->name,
1549 h->ident, sp->confid[cp->protoidx]);
1553 switch (sp->state[cp->protoidx]) {
1556 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1559 case STATE_STOPPING:
1561 case STATE_REQ_SENT:
1562 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1563 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1568 case STATE_ACK_RCVD:
1570 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1572 case STATE_ACK_SENT:
1573 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1574 sppp_cp_change_state(cp, sp, STATE_OPENED);
1576 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1577 SPP_ARGS(ifp), cp->name);
1581 printf(SPP_FMT "%s illegal %s in state %s\n",
1582 SPP_ARGS(ifp), cp->name,
1583 sppp_cp_type_name(h->type),
1584 sppp_state_name(sp->state[cp->protoidx]));
1590 if (h->ident != sp->confid[cp->protoidx]) {
1592 addlog(SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1593 SPP_ARGS(ifp), cp->name,
1594 h->ident, sp->confid[cp->protoidx]);
1598 if (h->type == CONF_NAK)
1599 (cp->RCN_nak)(sp, h, len);
1601 (cp->RCN_rej)(sp, h, len);
1603 switch (sp->state[cp->protoidx]) {
1606 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1608 case STATE_REQ_SENT:
1609 case STATE_ACK_SENT:
1610 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1612 * Slow things down a bit if we think we might be
1613 * in loopback. Depend on the timeout to send the
1614 * next configuration request.
1623 case STATE_ACK_RCVD:
1624 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1628 case STATE_STOPPING:
1631 printf(SPP_FMT "%s illegal %s in state %s\n",
1632 SPP_ARGS(ifp), cp->name,
1633 sppp_cp_type_name(h->type),
1634 sppp_state_name(sp->state[cp->protoidx]));
1640 switch (sp->state[cp->protoidx]) {
1641 case STATE_ACK_RCVD:
1642 case STATE_ACK_SENT:
1643 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1648 case STATE_STOPPING:
1649 case STATE_REQ_SENT:
1651 /* Send Terminate-Ack packet. */
1653 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
1654 SPP_ARGS(ifp), cp->name);
1655 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1659 sp->rst_counter[cp->protoidx] = 0;
1660 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1664 printf(SPP_FMT "%s illegal %s in state %s\n",
1665 SPP_ARGS(ifp), cp->name,
1666 sppp_cp_type_name(h->type),
1667 sppp_state_name(sp->state[cp->protoidx]));
1672 switch (sp->state[cp->protoidx]) {
1675 case STATE_REQ_SENT:
1676 case STATE_ACK_SENT:
1679 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1682 case STATE_STOPPING:
1683 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1686 case STATE_ACK_RCVD:
1687 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1692 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1695 printf(SPP_FMT "%s illegal %s in state %s\n",
1696 SPP_ARGS(ifp), cp->name,
1697 sppp_cp_type_name(h->type),
1698 sppp_state_name(sp->state[cp->protoidx]));
1703 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1705 SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
1706 "danger will robinson\n",
1707 SPP_ARGS(ifp), cp->name,
1708 sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
1709 switch (sp->state[cp->protoidx]) {
1712 case STATE_REQ_SENT:
1713 case STATE_ACK_SENT:
1715 case STATE_STOPPING:
1718 case STATE_ACK_RCVD:
1719 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1722 printf(SPP_FMT "%s illegal %s in state %s\n",
1723 SPP_ARGS(ifp), cp->name,
1724 sppp_cp_type_name(h->type),
1725 sppp_state_name(sp->state[cp->protoidx]));
1732 const struct cp *upper;
1738 proto = ntohs(*((u_int16_t *)p));
1739 for (i = 0; i < IDX_COUNT; i++) {
1740 if (cps[i]->proto == proto) {
1748 if (catastrophic || debug)
1749 log(catastrophic? LOG_INFO: LOG_DEBUG,
1750 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n",
1751 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+',
1752 sppp_cp_type_name(h->type), proto,
1753 upper ? upper->name : "unknown",
1754 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?");
1757 * if we got RXJ+ against conf-req, the peer does not implement
1758 * this particular protocol type. terminate the protocol.
1760 if (upper && !catastrophic) {
1761 if (sp->state[upper->protoidx] == STATE_REQ_SENT) {
1767 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1768 switch (sp->state[cp->protoidx]) {
1771 case STATE_REQ_SENT:
1772 case STATE_ACK_SENT:
1774 case STATE_STOPPING:
1777 case STATE_ACK_RCVD:
1778 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1781 printf(SPP_FMT "%s illegal %s in state %s\n",
1782 SPP_ARGS(ifp), cp->name,
1783 sppp_cp_type_name(h->type),
1784 sppp_state_name(sp->state[cp->protoidx]));
1790 if (cp->proto != PPP_LCP)
1792 /* Discard the packet. */
1795 if (cp->proto != PPP_LCP)
1797 if (sp->state[cp->protoidx] != STATE_OPENED) {
1799 addlog(SPP_FMT "lcp echo req but lcp closed\n",
1806 addlog(SPP_FMT "invalid lcp echo request "
1807 "packet length: %d bytes\n",
1808 SPP_ARGS(ifp), len);
1811 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
1812 ntohl (*(long*)(h+1)) == sp->lcp.magic) {
1813 /* Line loopback mode detected. */
1814 printf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
1815 sp->pp_loopcnt = MAXALIVECNT * 5;
1817 sppp_qflush (&sp->pp_cpq);
1819 /* Shut down the PPP link. */
1825 *(long*)(h+1) = htonl (sp->lcp.magic);
1827 addlog(SPP_FMT "got lcp echo req, sending echo rep\n",
1829 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
1832 if (cp->proto != PPP_LCP)
1834 if (h->ident != sp->lcp.echoid) {
1840 addlog(SPP_FMT "lcp invalid echo reply "
1841 "packet length: %d bytes\n",
1842 SPP_ARGS(ifp), len);
1846 addlog(SPP_FMT "lcp got echo rep\n",
1848 if (!(sp->lcp.opts & (1 << LCP_OPT_MAGIC)) ||
1849 ntohl (*(long*)(h+1)) != sp->lcp.magic)
1850 sp->pp_alivecnt = 0;
1853 /* Unknown packet type -- send Code-Reject packet. */
1856 addlog(SPP_FMT "%s send code-rej for 0x%x\n",
1857 SPP_ARGS(ifp), cp->name, h->type);
1858 sppp_cp_send(sp, cp->proto, CODE_REJ,
1859 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h);
1866 * The generic part of all Up/Down/Open/Close/TO event handlers.
1867 * Basically, the state transition handling in the automaton.
1870 sppp_up_event(const struct cp *cp, struct sppp *sp)
1875 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
1876 SPP_ARGS(ifp), cp->name,
1877 sppp_state_name(sp->state[cp->protoidx]));
1879 switch (sp->state[cp->protoidx]) {
1881 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1883 case STATE_STARTING:
1884 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1886 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1889 printf(SPP_FMT "%s illegal up in state %s\n",
1890 SPP_ARGS(ifp), cp->name,
1891 sppp_state_name(sp->state[cp->protoidx]));
1896 sppp_down_event(const struct cp *cp, struct sppp *sp)
1901 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
1902 SPP_ARGS(ifp), cp->name,
1903 sppp_state_name(sp->state[cp->protoidx]));
1905 switch (sp->state[cp->protoidx]) {
1908 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1911 sppp_cp_change_state(cp, sp, STATE_STARTING);
1914 case STATE_STOPPING:
1915 case STATE_REQ_SENT:
1916 case STATE_ACK_RCVD:
1917 case STATE_ACK_SENT:
1918 sppp_cp_change_state(cp, sp, STATE_STARTING);
1922 sppp_cp_change_state(cp, sp, STATE_STARTING);
1925 printf(SPP_FMT "%s illegal down in state %s\n",
1926 SPP_ARGS(ifp), cp->name,
1927 sppp_state_name(sp->state[cp->protoidx]));
1933 sppp_open_event(const struct cp *cp, struct sppp *sp)
1938 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
1939 SPP_ARGS(ifp), cp->name,
1940 sppp_state_name(sp->state[cp->protoidx]));
1942 switch (sp->state[cp->protoidx]) {
1944 sppp_cp_change_state(cp, sp, STATE_STARTING);
1947 case STATE_STARTING:
1950 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1952 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1956 * Try escaping stopped state. This seems to bite
1957 * people occasionally, in particular for IPCP,
1958 * presumably following previous IPCP negotiation
1959 * aborts. Somehow, we must have missed a Down event
1960 * which would have caused a transition into starting
1961 * state, so as a bandaid we force the Down event now.
1962 * This effectively implements (something like the)
1963 * `restart' option mentioned in the state transition
1964 * table of RFC 1661.
1966 sppp_cp_change_state(cp, sp, STATE_STARTING);
1969 case STATE_STOPPING:
1970 case STATE_REQ_SENT:
1971 case STATE_ACK_RCVD:
1972 case STATE_ACK_SENT:
1976 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1983 sppp_close_event(const struct cp *cp, struct sppp *sp)
1988 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
1989 SPP_ARGS(ifp), cp->name,
1990 sppp_state_name(sp->state[cp->protoidx]));
1992 switch (sp->state[cp->protoidx]) {
1997 case STATE_STARTING:
1998 sppp_cp_change_state(cp, sp, STATE_INITIAL);
2002 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2004 case STATE_STOPPING:
2005 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2010 case STATE_REQ_SENT:
2011 case STATE_ACK_RCVD:
2012 case STATE_ACK_SENT:
2013 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
2014 sppp_cp_send(sp, cp->proto, TERM_REQ,
2015 ++sp->pp_seq[cp->protoidx], 0, 0);
2016 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2022 sppp_to_event(const struct cp *cp, struct sppp *sp)
2029 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
2030 SPP_ARGS(ifp), cp->name,
2031 sppp_state_name(sp->state[cp->protoidx]),
2032 sp->rst_counter[cp->protoidx]);
2034 if (--sp->rst_counter[cp->protoidx] < 0)
2036 switch (sp->state[cp->protoidx]) {
2038 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2041 case STATE_STOPPING:
2042 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2045 case STATE_REQ_SENT:
2046 case STATE_ACK_RCVD:
2047 case STATE_ACK_SENT:
2048 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2054 switch (sp->state[cp->protoidx]) {
2056 case STATE_STOPPING:
2057 sppp_cp_send(sp, cp->proto, TERM_REQ,
2058 ++sp->pp_seq[cp->protoidx], 0, 0);
2059 TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout,
2060 sp->ch[cp->protoidx]);
2062 case STATE_REQ_SENT:
2063 case STATE_ACK_RCVD:
2065 /* sppp_cp_change_state() will restart the timer */
2066 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
2068 case STATE_ACK_SENT:
2070 TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout,
2071 sp->ch[cp->protoidx]);
2079 * Change the state of a control protocol in the state automaton.
2080 * Takes care of starting/stopping the restart timer.
2083 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
2085 sp->state[cp->protoidx] = newstate;
2087 UNTIMEOUT(cp->TO, (void *)sp, sp->ch[cp->protoidx]);
2090 case STATE_STARTING:
2096 case STATE_STOPPING:
2097 case STATE_REQ_SENT:
2098 case STATE_ACK_RCVD:
2099 case STATE_ACK_SENT:
2100 TIMEOUT(cp->TO, (void *)sp, sp->lcp.timeout,
2101 sp->ch[cp->protoidx]);
2107 *--------------------------------------------------------------------------*
2109 * The LCP implementation. *
2111 *--------------------------------------------------------------------------*
2114 sppp_lcp_init(struct sppp *sp)
2116 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2118 sp->state[IDX_LCP] = STATE_INITIAL;
2119 sp->fail_counter[IDX_LCP] = 0;
2120 sp->pp_seq[IDX_LCP] = 0;
2121 sp->pp_rseq[IDX_LCP] = 0;
2123 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2125 /* Note that these values are relevant for all control protocols */
2126 sp->lcp.timeout = 3 * hz;
2127 sp->lcp.max_terminate = 2;
2128 sp->lcp.max_configure = 10;
2129 sp->lcp.max_failure = 10;
2130 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
2131 callout_handle_init(&sp->ch[IDX_LCP]);
2136 sppp_lcp_up(struct sppp *sp)
2140 sp->pp_alivecnt = 0;
2141 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2144 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2146 * If this interface is passive or dial-on-demand, and we are
2147 * still in Initial state, it means we've got an incoming
2148 * call. Activate the interface.
2150 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
2153 SPP_FMT "Up event", SPP_ARGS(ifp));
2154 ifp->if_flags |= IFF_RUNNING;
2155 if (sp->state[IDX_LCP] == STATE_INITIAL) {
2157 addlog("(incoming call)\n");
2158 sp->pp_flags |= PP_CALLIN;
2162 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 &&
2163 (sp->state[IDX_LCP] == STATE_INITIAL)) {
2164 ifp->if_flags |= IFF_RUNNING;
2168 sppp_up_event(&lcp, sp);
2172 sppp_lcp_down(struct sppp *sp)
2176 sppp_down_event(&lcp, sp);
2179 * If this is neither a dial-on-demand nor a passive
2180 * interface, simulate an ``ifconfig down'' action, so the
2181 * administrator can force a redial by another ``ifconfig
2182 * up''. XXX For leased line operation, should we immediately
2183 * try to reopen the connection here?
2185 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
2187 SPP_FMT "Down event, taking interface down.\n",
2193 SPP_FMT "Down event (carrier loss)\n",
2195 sp->pp_flags &= ~PP_CALLIN;
2196 if (sp->state[IDX_LCP] != STATE_INITIAL)
2198 ifp->if_flags &= ~IFF_RUNNING;
2203 sppp_lcp_open(struct sppp *sp)
2206 * If we are authenticator, negotiate LCP_AUTH
2208 if (sp->hisauth.proto != 0)
2209 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
2211 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2212 sp->pp_flags &= ~PP_NEEDAUTH;
2213 sppp_open_event(&lcp, sp);
2217 sppp_lcp_close(struct sppp *sp)
2219 sppp_close_event(&lcp, sp);
2223 sppp_lcp_TO(void *cookie)
2225 sppp_to_event(&lcp, (struct sppp *)cookie);
2229 * Analyze a configure request. Return true if it was agreeable, and
2230 * caused action sca, false if it has been rejected or nak'ed, and
2231 * caused action scn. (The return value is used to make the state
2232 * transition decision in the state automaton.)
2235 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2238 u_char *buf, *r, *p;
2245 buf = r = malloc (len, M_TEMP, M_NOWAIT);
2250 log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
2253 /* pass 1: check for things that need to be rejected */
2255 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2257 addlog(" %s ", sppp_lcp_opt_name(*p));
2261 if (len >= 6 && p[1] == 6)
2264 addlog("[invalid] ");
2266 case LCP_OPT_ASYNC_MAP:
2267 /* Async control character map. */
2268 if (len >= 6 && p[1] == 6)
2271 addlog("[invalid] ");
2274 /* Maximum receive unit. */
2275 if (len >= 4 && p[1] == 4)
2278 addlog("[invalid] ");
2280 case LCP_OPT_AUTH_PROTO:
2283 addlog("[invalid] ");
2286 authproto = (p[2] << 8) + p[3];
2287 if (authproto == PPP_CHAP && p[1] != 5) {
2289 addlog("[invalid chap len] ");
2292 if (sp->myauth.proto == 0) {
2293 /* we are not configured to do auth */
2295 addlog("[not configured] ");
2299 * Remote want us to authenticate, remember this,
2300 * so we stay in PHASE_AUTHENTICATE after LCP got
2303 sp->pp_flags |= PP_NEEDAUTH;
2306 /* Others not supported. */
2311 /* Add the option to rejected list. */
2318 addlog(" send conf-rej\n");
2319 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2325 * pass 2: check for option values that are unacceptable and
2326 * thus require to be nak'ed.
2329 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
2334 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2336 addlog(" %s ", sppp_lcp_opt_name(*p));
2339 /* Magic number -- extract. */
2340 nmagic = (u_long)p[2] << 24 |
2341 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2342 if (nmagic != sp->lcp.magic) {
2345 addlog("0x%lx ", nmagic);
2348 if (debug && sp->pp_loopcnt < MAXALIVECNT*5)
2349 addlog("[glitch] ");
2352 * We negate our magic here, and NAK it. If
2353 * we see it later in an NAK packet, we
2354 * suggest a new one.
2356 nmagic = ~sp->lcp.magic;
2358 p[2] = nmagic >> 24;
2359 p[3] = nmagic >> 16;
2364 case LCP_OPT_ASYNC_MAP:
2366 * Async control character map -- just ignore it.
2368 * Quote from RFC 1662, chapter 6:
2369 * To enable this functionality, synchronous PPP
2370 * implementations MUST always respond to the
2371 * Async-Control-Character-Map Configuration
2372 * Option with the LCP Configure-Ack. However,
2373 * acceptance of the Configuration Option does
2374 * not imply that the synchronous implementation
2375 * will do any ACCM mapping. Instead, all such
2376 * octet mapping will be performed by the
2377 * asynchronous-to-synchronous converter.
2383 * Maximum receive unit. Always agreeable,
2384 * but ignored by now.
2386 sp->lcp.their_mru = p[2] * 256 + p[3];
2388 addlog("%lu ", sp->lcp.their_mru);
2391 case LCP_OPT_AUTH_PROTO:
2392 authproto = (p[2] << 8) + p[3];
2393 if (sp->myauth.proto != authproto) {
2394 /* not agreed, nak */
2396 addlog("[mine %s != his %s] ",
2397 sppp_proto_name(sp->hisauth.proto),
2398 sppp_proto_name(authproto));
2399 p[2] = sp->myauth.proto >> 8;
2400 p[3] = sp->myauth.proto;
2403 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
2405 addlog("[chap not MD5] ");
2411 /* Add the option to nak'ed list. */
2418 * Local and remote magics equal -- loopback?
2420 if (sp->pp_loopcnt >= MAXALIVECNT*5) {
2421 if (sp->pp_loopcnt == MAXALIVECNT*5)
2422 printf (SPP_FMT "loopback\n",
2424 if (ifp->if_flags & IFF_UP) {
2426 sppp_qflush(&sp->pp_cpq);
2431 } else if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
2433 addlog(" max_failure (%d) exceeded, "
2435 sp->lcp.max_failure);
2436 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2439 addlog(" send conf-nak\n");
2440 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
2444 addlog(" send conf-ack\n");
2445 sp->fail_counter[IDX_LCP] = 0;
2447 sppp_cp_send (sp, PPP_LCP, CONF_ACK,
2448 h->ident, origlen, h+1);
2456 * Analyze the LCP Configure-Reject option list, and adjust our
2460 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
2466 buf = malloc (len, M_TEMP, M_NOWAIT);
2471 log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
2475 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2477 addlog(" %s ", sppp_lcp_opt_name(*p));
2480 /* Magic number -- can't use it, use 0 */
2481 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
2486 * Should not be rejected anyway, since we only
2487 * negotiate a MRU if explicitly requested by
2490 sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
2492 case LCP_OPT_AUTH_PROTO:
2494 * Peer doesn't want to authenticate himself,
2495 * deny unless this is a dialout call, and
2496 * AUTHFLAG_NOCALLOUT is set.
2498 if ((sp->pp_flags & PP_CALLIN) == 0 &&
2499 (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
2501 addlog("[don't insist on auth "
2503 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2507 addlog("[access denied]\n");
2519 * Analyze the LCP Configure-NAK option list, and adjust our
2523 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
2530 buf = malloc (len, M_TEMP, M_NOWAIT);
2535 log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
2539 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2541 addlog(" %s ", sppp_lcp_opt_name(*p));
2544 /* Magic number -- renegotiate */
2545 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
2546 len >= 6 && p[1] == 6) {
2547 magic = (u_long)p[2] << 24 |
2548 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2550 * If the remote magic is our negated one,
2551 * this looks like a loopback problem.
2552 * Suggest a new magic to make sure.
2554 if (magic == ~sp->lcp.magic) {
2556 addlog("magic glitch ");
2557 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
2558 sp->lcp.magic = random();
2560 sp->lcp.magic = time.tv_sec + time.tv_usec;
2563 sp->lcp.magic = magic;
2565 addlog("%lu ", magic);
2571 * Peer wants to advise us to negotiate an MRU.
2572 * Agree on it if it's reasonable, or use
2573 * default otherwise.
2575 if (len >= 4 && p[1] == 4) {
2576 u_int mru = p[2] * 256 + p[3];
2579 if (mru < PP_MTU || mru > PP_MAX_MRU)
2582 sp->lcp.opts |= (1 << LCP_OPT_MRU);
2585 case LCP_OPT_AUTH_PROTO:
2587 * Peer doesn't like our authentication method,
2591 addlog("[access denied]\n");
2603 sppp_lcp_tlu(struct sppp *sp)
2610 if (! (ifp->if_flags & IFF_UP) &&
2611 (ifp->if_flags & IFF_RUNNING)) {
2612 /* Coming out of loopback mode. */
2614 printf (SPP_FMT "up\n", SPP_ARGS(ifp));
2617 for (i = 0; i < IDX_COUNT; i++)
2618 if ((cps[i])->flags & CP_QUAL)
2621 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
2622 (sp->pp_flags & PP_NEEDAUTH) != 0)
2623 sp->pp_phase = PHASE_AUTHENTICATE;
2625 sp->pp_phase = PHASE_NETWORK;
2628 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2629 sppp_phase_name(sp->pp_phase));
2632 * Open all authentication protocols. This is even required
2633 * if we already proceeded to network phase, since it might be
2634 * that remote wants us to authenticate, so we might have to
2635 * send a PAP request. Undesired authentication protocols
2636 * don't do anything when they get an Open event.
2638 for (i = 0; i < IDX_COUNT; i++)
2639 if ((cps[i])->flags & CP_AUTH)
2642 if (sp->pp_phase == PHASE_NETWORK) {
2643 /* Notify all NCPs. */
2644 for (i = 0; i < IDX_COUNT; i++)
2645 if (((cps[i])->flags & CP_NCP) &&
2648 * Hack to administratively disable IPv6 if
2649 * not desired. Perhaps we should have another
2650 * flag for this, but right now, we can make
2651 * all struct cp's read/only.
2653 (cps[i] != &ipv6cp ||
2654 (sp->confflags & CONF_ENABLE_IPV6)))
2658 /* Send Up events to all started protos. */
2659 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2660 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0)
2663 /* notify low-level driver of state change */
2665 sp->pp_chg(sp, (int)sp->pp_phase);
2667 if (sp->pp_phase == PHASE_NETWORK)
2668 /* if no NCP is starting, close down */
2669 sppp_lcp_check_and_close(sp);
2673 sppp_lcp_tld(struct sppp *sp)
2679 sp->pp_phase = PHASE_TERMINATE;
2682 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2683 sppp_phase_name(sp->pp_phase));
2686 * Take upper layers down. We send the Down event first and
2687 * the Close second to prevent the upper layers from sending
2688 * ``a flurry of terminate-request packets'', as the RFC
2691 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2692 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) {
2694 (cps[i])->Close(sp);
2699 sppp_lcp_tls(struct sppp *sp)
2703 sp->pp_phase = PHASE_ESTABLISH;
2706 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2707 sppp_phase_name(sp->pp_phase));
2709 /* Notify lower layer if desired. */
2717 sppp_lcp_tlf(struct sppp *sp)
2721 sp->pp_phase = PHASE_DEAD;
2723 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2724 sppp_phase_name(sp->pp_phase));
2726 /* Notify lower layer if desired. */
2734 sppp_lcp_scr(struct sppp *sp)
2736 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
2740 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
2741 if (! sp->lcp.magic)
2742 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
2743 sp->lcp.magic = random();
2745 sp->lcp.magic = time.tv_sec + time.tv_usec;
2747 opt[i++] = LCP_OPT_MAGIC;
2749 opt[i++] = sp->lcp.magic >> 24;
2750 opt[i++] = sp->lcp.magic >> 16;
2751 opt[i++] = sp->lcp.magic >> 8;
2752 opt[i++] = sp->lcp.magic;
2755 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
2756 opt[i++] = LCP_OPT_MRU;
2758 opt[i++] = sp->lcp.mru >> 8;
2759 opt[i++] = sp->lcp.mru;
2762 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
2763 authproto = sp->hisauth.proto;
2764 opt[i++] = LCP_OPT_AUTH_PROTO;
2765 opt[i++] = authproto == PPP_CHAP? 5: 4;
2766 opt[i++] = authproto >> 8;
2767 opt[i++] = authproto;
2768 if (authproto == PPP_CHAP)
2769 opt[i++] = CHAP_MD5;
2772 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP];
2773 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
2777 * Check the open NCPs, return true if at least one NCP is open.
2780 sppp_ncp_check(struct sppp *sp)
2784 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2785 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP)
2791 * Re-check the open NCPs and see if we should terminate the link.
2792 * Called by the NCPs during their tlf action handling.
2795 sppp_lcp_check_and_close(struct sppp *sp)
2798 if (sp->pp_phase < PHASE_NETWORK)
2799 /* don't bother, we are already going down */
2802 if (sppp_ncp_check(sp))
2809 *--------------------------------------------------------------------------*
2811 * The IPCP implementation. *
2813 *--------------------------------------------------------------------------*
2817 sppp_ipcp_init(struct sppp *sp)
2821 sp->state[IDX_IPCP] = STATE_INITIAL;
2822 sp->fail_counter[IDX_IPCP] = 0;
2823 sp->pp_seq[IDX_IPCP] = 0;
2824 sp->pp_rseq[IDX_IPCP] = 0;
2825 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
2826 callout_handle_init(&sp->ch[IDX_IPCP]);
2831 sppp_ipcp_up(struct sppp *sp)
2833 sppp_up_event(&ipcp, sp);
2837 sppp_ipcp_down(struct sppp *sp)
2839 sppp_down_event(&ipcp, sp);
2843 sppp_ipcp_open(struct sppp *sp)
2846 u_long myaddr, hisaddr;
2848 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN | IPCP_MYADDR_SEEN |
2849 IPCP_MYADDR_DYN | IPCP_VJ);
2852 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
2854 * If we don't have his address, this probably means our
2855 * interface doesn't want to talk IP at all. (This could
2856 * be the case if somebody wants to speak only IPX, for
2857 * example.) Don't open IPCP in this case.
2859 if (hisaddr == 0L) {
2860 /* XXX this message should go away */
2862 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
2868 * I don't have an assigned address, so i need to
2869 * negotiate my address.
2871 sp->ipcp.flags |= IPCP_MYADDR_DYN;
2872 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
2874 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
2875 if (sp->confflags & CONF_ENABLE_VJ) {
2876 sp->ipcp.opts |= (1 << IPCP_OPT_COMPRESSION);
2877 sp->ipcp.max_state = MAX_STATES - 1;
2878 sp->ipcp.compress_cid = 1;
2880 sppp_open_event(&ipcp, sp);
2884 sppp_ipcp_close(struct sppp *sp)
2886 sppp_close_event(&ipcp, sp);
2887 if (sp->ipcp.flags & IPCP_MYADDR_DYN)
2889 * My address was dynamic, clear it again.
2891 sppp_set_ip_addr(sp, 0L);
2895 sppp_ipcp_TO(void *cookie)
2897 sppp_to_event(&ipcp, (struct sppp *)cookie);
2901 * Analyze a configure request. Return true if it was agreeable, and
2902 * caused action sca, false if it has been rejected or nak'ed, and
2903 * caused action scn. (The return value is used to make the state
2904 * transition decision in the state automaton.)
2907 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2909 u_char *buf, *r, *p;
2910 struct ifnet *ifp = &sp->pp_if;
2911 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
2912 u_long hisaddr, desiredaddr;
2919 * Make sure to allocate a buf that can at least hold a
2920 * conf-nak with an `address' option. We might need it below.
2922 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
2926 /* pass 1: see if we can recognize them */
2928 log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
2931 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2933 addlog(" %s ", sppp_ipcp_opt_name(*p));
2935 case IPCP_OPT_COMPRESSION:
2936 if (!(sp->confflags & CONF_ENABLE_VJ)) {
2937 /* VJ compression administratively disabled */
2939 addlog("[locally disabled] ");
2943 * In theory, we should only conf-rej an
2944 * option that is shorter than RFC 1618
2945 * requires (i.e. < 4), and should conf-nak
2946 * anything else that is not VJ. However,
2947 * since our algorithm always uses the
2948 * original option to NAK it with new values,
2949 * things would become more complicated. In
2950 * pratice, the only commonly implemented IP
2951 * compression option is VJ anyway, so the
2952 * difference is negligible.
2954 if (len >= 6 && p[1] == 6) {
2956 * correctly formed compression option
2957 * that could be VJ compression
2962 addlog("optlen %d [invalid/unsupported] ",
2965 case IPCP_OPT_ADDRESS:
2966 if (len >= 6 && p[1] == 6) {
2967 /* correctly formed address option */
2971 addlog("[invalid] ");
2974 /* Others not supported. */
2979 /* Add the option to rejected list. */
2986 addlog(" send conf-rej\n");
2987 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
2992 /* pass 2: parse option values */
2993 sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
2995 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
2999 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3001 addlog(" %s ", sppp_ipcp_opt_name(*p));
3003 case IPCP_OPT_COMPRESSION:
3004 desiredcomp = p[2] << 8 | p[3];
3005 /* We only support VJ */
3006 if (desiredcomp == IPCP_COMP_VJ) {
3008 addlog("VJ [ack] ");
3009 sp->ipcp.flags |= IPCP_VJ;
3010 sl_compress_init(sp->pp_comp, p[4]);
3011 sp->ipcp.max_state = p[4];
3012 sp->ipcp.compress_cid = p[5];
3016 addlog("compproto %#04x [not supported] ",
3018 p[2] = IPCP_COMP_VJ >> 8;
3019 p[3] = IPCP_COMP_VJ;
3020 p[4] = sp->ipcp.max_state;
3021 p[5] = sp->ipcp.compress_cid;
3023 case IPCP_OPT_ADDRESS:
3024 /* This is the address he wants in his end */
3025 desiredaddr = p[2] << 24 | p[3] << 16 |
3027 if (desiredaddr == hisaddr ||
3028 (hisaddr >= 1 && hisaddr <= 254 && desiredaddr != 0)) {
3030 * Peer's address is same as our value,
3031 * or we have set it to 0.0.0.* to
3032 * indicate that we do not really care,
3033 * this is agreeable. Gonna conf-ack
3038 sppp_dotted_quad(hisaddr));
3039 /* record that we've seen it already */
3040 sp->ipcp.flags |= IPCP_HISADDR_SEEN;
3044 * The address wasn't agreeable. This is either
3045 * he sent us 0.0.0.0, asking to assign him an
3046 * address, or he send us another address not
3047 * matching our value. Either case, we gonna
3048 * conf-nak it with our value.
3049 * XXX: we should "rej" if hisaddr == 0
3052 if (desiredaddr == 0)
3053 addlog("[addr requested] ");
3055 addlog("%s [not agreed] ",
3056 sppp_dotted_quad(desiredaddr));
3059 p[2] = hisaddr >> 24;
3060 p[3] = hisaddr >> 16;
3061 p[4] = hisaddr >> 8;
3065 /* Add the option to nak'ed list. */
3072 * If we are about to conf-ack the request, but haven't seen
3073 * his address so far, gonna conf-nak it instead, with the
3074 * `address' option present and our idea of his address being
3075 * filled in there, to request negotiation of both addresses.
3077 * XXX This can result in an endless req - nak loop if peer
3078 * doesn't want to send us his address. Q: What should we do
3079 * about it? XXX A: implement the max-failure counter.
3081 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
3082 buf[0] = IPCP_OPT_ADDRESS;
3084 buf[2] = hisaddr >> 24;
3085 buf[3] = hisaddr >> 16;
3086 buf[4] = hisaddr >> 8;
3090 addlog("still need hisaddr ");
3095 addlog(" send conf-nak\n");
3096 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
3099 addlog(" send conf-ack\n");
3100 sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
3101 h->ident, origlen, h+1);
3109 * Analyze the IPCP Configure-Reject option list, and adjust our
3113 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3116 struct ifnet *ifp = &sp->pp_if;
3117 int debug = ifp->if_flags & IFF_DEBUG;
3120 buf = malloc (len, M_TEMP, M_NOWAIT);
3125 log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
3129 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3131 addlog(" %s ", sppp_ipcp_opt_name(*p));
3133 case IPCP_OPT_COMPRESSION:
3134 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESSION);
3136 case IPCP_OPT_ADDRESS:
3138 * Peer doesn't grok address option. This is
3139 * bad. XXX Should we better give up here?
3140 * XXX We could try old "addresses" option...
3142 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
3153 * Analyze the IPCP Configure-NAK option list, and adjust our
3157 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3160 struct ifnet *ifp = &sp->pp_if;
3161 int debug = ifp->if_flags & IFF_DEBUG;
3166 buf = malloc (len, M_TEMP, M_NOWAIT);
3171 log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
3175 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3177 addlog(" %s ", sppp_ipcp_opt_name(*p));
3179 case IPCP_OPT_COMPRESSION:
3180 if (len >= 6 && p[1] == 6) {
3181 desiredcomp = p[2] << 8 | p[3];
3183 addlog("[wantcomp %#04x] ",
3185 if (desiredcomp == IPCP_COMP_VJ) {
3186 sl_compress_init(sp->pp_comp, p[4]);
3187 sp->ipcp.max_state = p[4];
3188 sp->ipcp.compress_cid = p[5];
3193 ~(1 << IPCP_OPT_COMPRESSION);
3196 case IPCP_OPT_ADDRESS:
3198 * Peer doesn't like our local IP address. See
3199 * if we can do something for him. We'll drop
3200 * him our address then.
3202 if (len >= 6 && p[1] == 6) {
3203 wantaddr = p[2] << 24 | p[3] << 16 |
3205 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
3207 addlog("[wantaddr %s] ",
3208 sppp_dotted_quad(wantaddr));
3210 * When doing dynamic address assignment,
3211 * we accept his offer. Otherwise, we
3212 * ignore it and thus continue to negotiate
3213 * our already existing value.
3214 * XXX: Bogus, if he said no once, he'll
3215 * just say no again, might as well die.
3217 if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
3218 sppp_set_ip_addr(sp, wantaddr);
3221 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
3234 sppp_ipcp_tlu(struct sppp *sp)
3236 /* we are up - notify isdn daemon */
3242 sppp_ipcp_tld(struct sppp *sp)
3247 sppp_ipcp_tls(struct sppp *sp)
3249 /* indicate to LCP that it must stay alive */
3250 sp->lcp.protos |= (1 << IDX_IPCP);
3254 sppp_ipcp_tlf(struct sppp *sp)
3256 /* we no longer need LCP */
3257 sp->lcp.protos &= ~(1 << IDX_IPCP);
3258 sppp_lcp_check_and_close(sp);
3262 sppp_ipcp_scr(struct sppp *sp)
3264 char opt[6 /* compression */ + 6 /* address */];
3268 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
3269 opt[i++] = IPCP_OPT_COMPRESSION;
3271 opt[i++] = IPCP_COMP_VJ >> 8;
3272 opt[i++] = IPCP_COMP_VJ;
3273 opt[i++] = sp->ipcp.max_state;
3274 opt[i++] = sp->ipcp.compress_cid;
3276 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
3277 sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
3278 opt[i++] = IPCP_OPT_ADDRESS;
3280 opt[i++] = ouraddr >> 24;
3281 opt[i++] = ouraddr >> 16;
3282 opt[i++] = ouraddr >> 8;
3286 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP];
3287 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
3291 *--------------------------------------------------------------------------*
3293 * The IPv6CP implementation. *
3295 *--------------------------------------------------------------------------*
3300 sppp_ipv6cp_init(struct sppp *sp)
3302 sp->ipv6cp.opts = 0;
3303 sp->ipv6cp.flags = 0;
3304 sp->state[IDX_IPV6CP] = STATE_INITIAL;
3305 sp->fail_counter[IDX_IPV6CP] = 0;
3306 sp->pp_seq[IDX_IPV6CP] = 0;
3307 sp->pp_rseq[IDX_IPV6CP] = 0;
3308 #if defined(__NetBSD__)
3309 callout_init(&sp->ch[IDX_IPV6CP]);
3311 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
3312 callout_handle_init(&sp->ch[IDX_IPV6CP]);
3317 sppp_ipv6cp_up(struct sppp *sp)
3319 sppp_up_event(&ipv6cp, sp);
3323 sppp_ipv6cp_down(struct sppp *sp)
3325 sppp_down_event(&ipv6cp, sp);
3329 sppp_ipv6cp_open(struct sppp *sp)
3332 struct in6_addr myaddr, hisaddr;
3334 #ifdef IPV6CP_MYIFID_DYN
3335 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN);
3337 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN;
3340 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0);
3342 * If we don't have our address, this probably means our
3343 * interface doesn't want to talk IPv6 at all. (This could
3344 * be the case if somebody wants to speak only IPX, for
3345 * example.) Don't open IPv6CP in this case.
3347 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) {
3348 /* XXX this message should go away */
3350 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n",
3355 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3356 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3357 sppp_open_event(&ipv6cp, sp);
3361 sppp_ipv6cp_close(struct sppp *sp)
3363 sppp_close_event(&ipv6cp, sp);
3367 sppp_ipv6cp_TO(void *cookie)
3369 sppp_to_event(&ipv6cp, (struct sppp *)cookie);
3373 * Analyze a configure request. Return true if it was agreeable, and
3374 * caused action sca, false if it has been rejected or nak'ed, and
3375 * caused action scn. (The return value is used to make the state
3376 * transition decision in the state automaton.)
3379 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3381 u_char *buf, *r, *p;
3382 struct ifnet *ifp = &sp->pp_if;
3383 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
3384 struct in6_addr myaddr, desiredaddr, suggestaddr;
3387 int collision, nohisaddr;
3392 * Make sure to allocate a buf that can at least hold a
3393 * conf-nak with an `address' option. We might need it below.
3395 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
3399 /* pass 1: see if we can recognize them */
3401 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:",
3405 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3407 addlog(" %s", sppp_ipv6cp_opt_name(*p));
3409 case IPV6CP_OPT_IFID:
3410 if (len >= 10 && p[1] == 10 && ifidcount == 0) {
3411 /* correctly formed address option */
3416 addlog(" [invalid]");
3419 case IPV6CP_OPT_COMPRESSION:
3420 if (len >= 4 && p[1] >= 4) {
3421 /* correctly formed compress option */
3425 addlog(" [invalid]");
3429 /* Others not supported. */
3434 /* Add the option to rejected list. */
3441 addlog(" send conf-rej\n");
3442 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf);
3447 /* pass 2: parse option values */
3448 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
3450 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ",
3455 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3457 addlog(" %s", sppp_ipv6cp_opt_name(*p));
3460 case IPV6CP_OPT_COMPRESSION:
3463 case IPV6CP_OPT_IFID:
3464 bzero(&desiredaddr, sizeof(desiredaddr));
3465 bcopy(&p[2], &desiredaddr.s6_addr[8], 8);
3466 collision = (bcmp(&desiredaddr.s6_addr[8],
3467 &myaddr.s6_addr[8], 8) == 0);
3468 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr);
3470 desiredaddr.s6_addr16[0] = htons(0xfe80);
3471 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index);
3473 if (!collision && !nohisaddr) {
3474 /* no collision, hisaddr known - Conf-Ack */
3479 ip6_sprintf(&desiredaddr),
3480 sppp_cp_type_name(type));
3485 bzero(&suggestaddr, sizeof(&suggestaddr));
3486 if (collision && nohisaddr) {
3487 /* collision, hisaddr unknown - Conf-Rej */
3492 * - no collision, hisaddr unknown, or
3493 * - collision, hisaddr known
3494 * Conf-Nak, suggest hisaddr
3497 sppp_suggest_ip6_addr(sp, &suggestaddr);
3498 bcopy(&suggestaddr.s6_addr[8], &p[2], 8);
3501 addlog(" %s [%s]", ip6_sprintf(&desiredaddr),
3502 sppp_cp_type_name(type));
3505 /* Add the option to nak'ed list. */
3511 if (rlen == 0 && type == CONF_ACK) {
3513 addlog(" send %s\n", sppp_cp_type_name(type));
3514 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1);
3517 if (type == CONF_ACK)
3518 panic("IPv6CP RCR: CONF_ACK with non-zero rlen");
3522 addlog(" send %s suggest %s\n",
3523 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr));
3525 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf);
3534 * Analyze the IPv6CP Configure-Reject option list, and adjust our
3538 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3541 struct ifnet *ifp = &sp->pp_if;
3542 int debug = ifp->if_flags & IFF_DEBUG;
3545 buf = malloc (len, M_TEMP, M_NOWAIT);
3550 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:",
3554 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3556 addlog(" %s", sppp_ipv6cp_opt_name(*p));
3558 case IPV6CP_OPT_IFID:
3560 * Peer doesn't grok address option. This is
3561 * bad. XXX Should we better give up here?
3563 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID);
3566 case IPV6CP_OPT_COMPRESS:
3567 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS);
3579 * Analyze the IPv6CP Configure-NAK option list, and adjust our
3583 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3586 struct ifnet *ifp = &sp->pp_if;
3587 int debug = ifp->if_flags & IFF_DEBUG;
3588 struct in6_addr suggestaddr;
3591 buf = malloc (len, M_TEMP, M_NOWAIT);
3596 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:",
3600 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3602 addlog(" %s", sppp_ipv6cp_opt_name(*p));
3604 case IPV6CP_OPT_IFID:
3606 * Peer doesn't like our local ifid. See
3607 * if we can do something for him. We'll drop
3608 * him our address then.
3610 if (len < 10 || p[1] != 10)
3612 bzero(&suggestaddr, sizeof(suggestaddr));
3613 suggestaddr.s6_addr16[0] = htons(0xfe80);
3614 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index);
3615 bcopy(&p[2], &suggestaddr.s6_addr[8], 8);
3617 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3619 addlog(" [suggestaddr %s]",
3620 ip6_sprintf(&suggestaddr));
3621 #ifdef IPV6CP_MYIFID_DYN
3623 * When doing dynamic address assignment,
3624 * we accept his offer.
3626 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) {
3627 struct in6_addr lastsuggest;
3629 * If <suggested myaddr from peer> equals to
3630 * <hisaddr we have suggested last time>,
3631 * we have a collision. generate new random
3634 sppp_suggest_ip6_addr(&lastsuggest);
3635 if (IN6_ARE_ADDR_EQUAL(&suggestaddr,
3638 addlog(" [random]");
3639 sppp_gen_ip6_addr(sp, &suggestaddr);
3641 sppp_set_ip6_addr(sp, &suggestaddr, 0);
3644 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3648 * Since we do not do dynamic address assignment,
3649 * we ignore it and thus continue to negotiate
3650 * our already existing value. This can possibly
3651 * go into infinite request-reject loop.
3653 * This is not likely because we normally use
3654 * ifid based on MAC-address.
3655 * If you have no ethernet card on the node, too bad.
3656 * XXX should we use fail_counter?
3661 case IPV6CP_OPT_COMPRESS:
3663 * Peer wants different compression parameters.
3675 sppp_ipv6cp_tlu(struct sppp *sp)
3677 /* we are up - notify isdn daemon */
3683 sppp_ipv6cp_tld(struct sppp *sp)
3688 sppp_ipv6cp_tls(struct sppp *sp)
3690 /* indicate to LCP that it must stay alive */
3691 sp->lcp.protos |= (1 << IDX_IPV6CP);
3695 sppp_ipv6cp_tlf(struct sppp *sp)
3698 #if 0 /* need #if 0 to close IPv6CP properly */
3699 /* we no longer need LCP */
3700 sp->lcp.protos &= ~(1 << IDX_IPV6CP);
3701 sppp_lcp_check_and_close(sp);
3706 sppp_ipv6cp_scr(struct sppp *sp)
3708 char opt[10 /* ifid */ + 4 /* compression, minimum */];
3709 struct in6_addr ouraddr;
3712 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) {
3713 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0);
3714 opt[i++] = IPV6CP_OPT_IFID;
3716 bcopy(&ouraddr.s6_addr[8], &opt[i], 8);
3721 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) {
3722 opt[i++] = IPV6CP_OPT_COMPRESSION;
3724 opt[i++] = 0; /* TBD */
3725 opt[i++] = 0; /* TBD */
3726 /* variable length data may follow */
3730 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP];
3731 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt);
3734 static void sppp_ipv6cp_init(struct sppp *sp)
3738 static void sppp_ipv6cp_up(struct sppp *sp)
3742 static void sppp_ipv6cp_down(struct sppp *sp)
3747 static void sppp_ipv6cp_open(struct sppp *sp)
3751 static void sppp_ipv6cp_close(struct sppp *sp)
3755 static void sppp_ipv6cp_TO(void *sp)
3759 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3764 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3768 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3772 static void sppp_ipv6cp_tlu(struct sppp *sp)
3776 static void sppp_ipv6cp_tld(struct sppp *sp)
3780 static void sppp_ipv6cp_tls(struct sppp *sp)
3784 static void sppp_ipv6cp_tlf(struct sppp *sp)
3788 static void sppp_ipv6cp_scr(struct sppp *sp)
3794 *--------------------------------------------------------------------------*
3796 * The CHAP implementation. *
3798 *--------------------------------------------------------------------------*
3802 * The authentication protocols don't employ a full-fledged state machine as
3803 * the control protocols do, since they do have Open and Close events, but
3804 * not Up and Down, nor are they explicitly terminated. Also, use of the
3805 * authentication protocols may be different in both directions (this makes
3806 * sense, think of a machine that never accepts incoming calls but only
3807 * calls out, it doesn't require the called party to authenticate itself).
3809 * Our state machine for the local authentication protocol (we are requesting
3810 * the peer to authenticate) looks like:
3813 * +--------------------------------------------+
3815 * +--------+ Close +---------+ RCA+
3816 * | |<----------------------------------| |------+
3817 * +--->| Closed | TO* | Opened | sca |
3818 * | | |-----+ +-------| |<-----+
3819 * | +--------+ irc | | +---------+
3825 * | | +------->+ | |
3827 * | +--------+ V | |
3828 * | | |<----+<--------------------+ |
3834 * +------+ +------------------------------------------+
3835 * scn,tld sca,irc,ict,tlu
3840 * Open: LCP reached authentication phase
3841 * Close: LCP reached terminate phase
3843 * RCA+: received reply (pap-req, chap-response), acceptable
3844 * RCN: received reply (pap-req, chap-response), not acceptable
3845 * TO+: timeout with restart counter >= 0
3846 * TO-: timeout with restart counter < 0
3847 * TO*: reschedule timeout for CHAP
3849 * scr: send request packet (none for PAP, chap-challenge)
3850 * sca: send ack packet (pap-ack, chap-success)
3851 * scn: send nak packet (pap-nak, chap-failure)
3852 * ict: initialize re-challenge timer (CHAP only)
3854 * tlu: this-layer-up, LCP reaches network phase
3855 * tld: this-layer-down, LCP enters terminate phase
3857 * Note that in CHAP mode, after sending a new challenge, while the state
3858 * automaton falls back into Req-Sent state, it doesn't signal a tld
3859 * event to LCP, so LCP remains in network phase. Only after not getting
3860 * any response (or after getting an unacceptable response), CHAP closes,
3861 * causing LCP to enter terminate phase.
3863 * With PAP, there is no initial request that can be sent. The peer is
3864 * expected to send one based on the successful negotiation of PAP as
3865 * the authentication protocol during the LCP option negotiation.
3867 * Incoming authentication protocol requests (remote requests
3868 * authentication, we are peer) don't employ a state machine at all,
3869 * they are simply answered. Some peers [Ascend P50 firmware rev
3870 * 4.50] react allergically when sending IPCP requests while they are
3871 * still in authentication phase (thereby violating the standard that
3872 * demands that these NCP packets are to be discarded), so we keep
3873 * track of the peer demanding us to authenticate, and only proceed to
3874 * phase network once we've seen a positive acknowledge for the
3879 * Handle incoming CHAP packets.
3882 sppp_chap_input(struct sppp *sp, struct mbuf *m)
3885 struct lcp_header *h;
3887 u_char *value, *name, digest[AUTHKEYLEN], dsize;
3888 int value_len, name_len;
3891 len = m->m_pkthdr.len;
3895 SPP_FMT "chap invalid packet length: %d bytes\n",
3896 SPP_ARGS(ifp), len);
3899 h = mtod (m, struct lcp_header*);
3900 if (len > ntohs (h->len))
3901 len = ntohs (h->len);
3904 /* challenge, failure and success are his authproto */
3905 case CHAP_CHALLENGE:
3906 value = 1 + (u_char*)(h+1);
3907 value_len = value[-1];
3908 name = value + value_len;
3909 name_len = len - value_len - 5;
3913 SPP_FMT "chap corrupted challenge "
3914 "<%s id=0x%x len=%d",
3916 sppp_auth_type_name(PPP_CHAP, h->type),
3917 h->ident, ntohs(h->len));
3918 sppp_print_bytes((u_char*) (h+1), len-4);
3926 SPP_FMT "chap input <%s id=0x%x len=%d name=",
3928 sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
3930 sppp_print_string((char*) name, name_len);
3931 addlog(" value-size=%d value=", value_len);
3932 sppp_print_bytes(value, value_len);
3936 /* Compute reply value. */
3938 MD5Update(&ctx, &h->ident, 1);
3939 MD5Update(&ctx, sp->myauth.secret,
3940 sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
3941 MD5Update(&ctx, value, value_len);
3942 MD5Final(digest, &ctx);
3943 dsize = sizeof digest;
3945 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
3946 sizeof dsize, (const char *)&dsize,
3947 sizeof digest, digest,
3948 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
3955 log(LOG_DEBUG, SPP_FMT "chap success",
3959 sppp_print_string((char*)(h + 1), len - 4);
3964 sp->pp_flags &= ~PP_NEEDAUTH;
3965 if (sp->myauth.proto == PPP_CHAP &&
3966 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
3967 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
3969 * We are authenticator for CHAP but didn't
3970 * complete yet. Leave it to tlu to proceed
3977 sppp_phase_network(sp);
3982 log(LOG_INFO, SPP_FMT "chap failure",
3986 sppp_print_string((char*)(h + 1), len - 4);
3990 log(LOG_INFO, SPP_FMT "chap failure\n",
3992 /* await LCP shutdown by authenticator */
3995 /* response is my authproto */
3997 value = 1 + (u_char*)(h+1);
3998 value_len = value[-1];
3999 name = value + value_len;
4000 name_len = len - value_len - 5;
4004 SPP_FMT "chap corrupted response "
4005 "<%s id=0x%x len=%d",
4007 sppp_auth_type_name(PPP_CHAP, h->type),
4008 h->ident, ntohs(h->len));
4009 sppp_print_bytes((u_char*)(h+1), len-4);
4014 if (h->ident != sp->confid[IDX_CHAP]) {
4017 SPP_FMT "chap dropping response for old ID "
4018 "(got %d, expected %d)\n",
4020 h->ident, sp->confid[IDX_CHAP]);
4023 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
4024 || bcmp(name, sp->hisauth.name, name_len) != 0) {
4025 log(LOG_INFO, SPP_FMT "chap response, his name ",
4027 sppp_print_string(name, name_len);
4028 addlog(" != expected ");
4029 sppp_print_string(sp->hisauth.name,
4030 sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
4034 log(LOG_DEBUG, SPP_FMT "chap input(%s) "
4035 "<%s id=0x%x len=%d name=",
4037 sppp_state_name(sp->state[IDX_CHAP]),
4038 sppp_auth_type_name(PPP_CHAP, h->type),
4039 h->ident, ntohs (h->len));
4040 sppp_print_string((char*)name, name_len);
4041 addlog(" value-size=%d value=", value_len);
4042 sppp_print_bytes(value, value_len);
4045 if (value_len != AUTHKEYLEN) {
4048 SPP_FMT "chap bad hash value length: "
4049 "%d bytes, should be %d\n",
4050 SPP_ARGS(ifp), value_len,
4056 MD5Update(&ctx, &h->ident, 1);
4057 MD5Update(&ctx, sp->hisauth.secret,
4058 sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
4059 MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
4060 MD5Final(digest, &ctx);
4062 #define FAILMSG "Failed..."
4063 #define SUCCMSG "Welcome!"
4065 if (value_len != sizeof digest ||
4066 bcmp(digest, value, value_len) != 0) {
4067 /* action scn, tld */
4068 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
4069 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4074 /* action sca, perhaps tlu */
4075 if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
4076 sp->state[IDX_CHAP] == STATE_OPENED)
4077 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
4078 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4080 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
4081 sppp_cp_change_state(&chap, sp, STATE_OPENED);
4087 /* Unknown CHAP packet type -- ignore. */
4089 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
4090 "<0x%x id=0x%xh len=%d",
4092 sppp_state_name(sp->state[IDX_CHAP]),
4093 h->type, h->ident, ntohs(h->len));
4094 sppp_print_bytes((u_char*)(h+1), len-4);
4103 sppp_chap_init(struct sppp *sp)
4105 /* Chap doesn't have STATE_INITIAL at all. */
4106 sp->state[IDX_CHAP] = STATE_CLOSED;
4107 sp->fail_counter[IDX_CHAP] = 0;
4108 sp->pp_seq[IDX_CHAP] = 0;
4109 sp->pp_rseq[IDX_CHAP] = 0;
4110 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
4111 callout_handle_init(&sp->ch[IDX_CHAP]);
4116 sppp_chap_open(struct sppp *sp)
4118 if (sp->myauth.proto == PPP_CHAP &&
4119 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4120 /* we are authenticator for CHAP, start it */
4122 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4123 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4125 /* nothing to be done if we are peer, await a challenge */
4129 sppp_chap_close(struct sppp *sp)
4131 if (sp->state[IDX_CHAP] != STATE_CLOSED)
4132 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4136 sppp_chap_TO(void *cookie)
4138 struct sppp *sp = (struct sppp *)cookie;
4144 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
4146 sppp_state_name(sp->state[IDX_CHAP]),
4147 sp->rst_counter[IDX_CHAP]);
4149 if (--sp->rst_counter[IDX_CHAP] < 0)
4151 switch (sp->state[IDX_CHAP]) {
4152 case STATE_REQ_SENT:
4154 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4158 /* TO+ (or TO*) event */
4159 switch (sp->state[IDX_CHAP]) {
4162 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4164 case STATE_REQ_SENT:
4166 /* sppp_cp_change_state() will restart the timer */
4167 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4175 sppp_chap_tlu(struct sppp *sp)
4181 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4184 * Some broken CHAP implementations (Conware CoNet, firmware
4185 * 4.0.?) don't want to re-authenticate their CHAP once the
4186 * initial challenge-response exchange has taken place.
4187 * Provide for an option to avoid rechallenges.
4189 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
4191 * Compute the re-challenge timeout. This will yield
4192 * a number between 300 and 810 seconds.
4194 i = 300 + ((unsigned)(random() & 0xff00) >> 7);
4195 TIMEOUT(chap.TO, (void *)sp, i * hz, sp->ch[IDX_CHAP]);
4200 SPP_FMT "chap %s, ",
4202 sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
4203 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
4204 addlog("next re-challenge in %d seconds\n", i);
4206 addlog("re-challenging supressed\n");
4210 /* indicate to LCP that we need to be closed down */
4211 sp->lcp.protos |= (1 << IDX_CHAP);
4213 if (sp->pp_flags & PP_NEEDAUTH) {
4215 * Remote is authenticator, but his auth proto didn't
4216 * complete yet. Defer the transition to network
4225 * If we are already in phase network, we are done here. This
4226 * is the case if this is a dummy tlu event after a re-challenge.
4228 if (sp->pp_phase != PHASE_NETWORK)
4229 sppp_phase_network(sp);
4233 sppp_chap_tld(struct sppp *sp)
4238 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
4239 UNTIMEOUT(chap.TO, (void *)sp, sp->ch[IDX_CHAP]);
4240 sp->lcp.protos &= ~(1 << IDX_CHAP);
4246 sppp_chap_scr(struct sppp *sp)
4251 /* Compute random challenge. */
4252 ch = (u_long *)sp->myauth.challenge;
4253 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
4254 read_random(&seed, sizeof seed);
4259 seed = tv.tv_sec ^ tv.tv_usec;
4262 ch[0] = seed ^ random();
4263 ch[1] = seed ^ random();
4264 ch[2] = seed ^ random();
4265 ch[3] = seed ^ random();
4268 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP];
4270 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
4271 sizeof clen, (const char *)&clen,
4272 (size_t)AUTHKEYLEN, sp->myauth.challenge,
4273 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4279 *--------------------------------------------------------------------------*
4281 * The PAP implementation. *
4283 *--------------------------------------------------------------------------*
4286 * For PAP, we need to keep a little state also if we are the peer, not the
4287 * authenticator. This is since we don't get a request to authenticate, but
4288 * have to repeatedly authenticate ourself until we got a response (or the
4289 * retry counter is expired).
4293 * Handle incoming PAP packets. */
4295 sppp_pap_input(struct sppp *sp, struct mbuf *m)
4298 struct lcp_header *h;
4300 u_char *name, *passwd, mlen;
4301 int name_len, passwd_len;
4303 len = m->m_pkthdr.len;
4307 SPP_FMT "pap invalid packet length: %d bytes\n",
4308 SPP_ARGS(ifp), len);
4311 h = mtod (m, struct lcp_header*);
4312 if (len > ntohs (h->len))
4313 len = ntohs (h->len);
4315 /* PAP request is my authproto */
4317 name = 1 + (u_char*)(h+1);
4318 name_len = name[-1];
4319 passwd = name + name_len + 1;
4320 if (name_len > len - 6 ||
4321 (passwd_len = passwd[-1]) > len - 6 - name_len) {
4323 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4324 "<%s id=0x%x len=%d",
4326 sppp_auth_type_name(PPP_PAP, h->type),
4327 h->ident, ntohs(h->len));
4328 sppp_print_bytes((u_char*)(h+1), len-4);
4334 log(LOG_DEBUG, SPP_FMT "pap input(%s) "
4335 "<%s id=0x%x len=%d name=",
4337 sppp_state_name(sp->state[IDX_PAP]),
4338 sppp_auth_type_name(PPP_PAP, h->type),
4339 h->ident, ntohs(h->len));
4340 sppp_print_string((char*)name, name_len);
4342 sppp_print_string((char*)passwd, passwd_len);
4345 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) ||
4346 passwd_len != sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN) ||
4347 bcmp(name, sp->hisauth.name, name_len) != 0 ||
4348 bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
4349 /* action scn, tld */
4350 mlen = sizeof(FAILMSG) - 1;
4351 sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
4352 sizeof mlen, (const char *)&mlen,
4353 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4358 /* action sca, perhaps tlu */
4359 if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
4360 sp->state[IDX_PAP] == STATE_OPENED) {
4361 mlen = sizeof(SUCCMSG) - 1;
4362 sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
4363 sizeof mlen, (const char *)&mlen,
4364 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4367 if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
4368 sppp_cp_change_state(&pap, sp, STATE_OPENED);
4373 /* ack and nak are his authproto */
4375 UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
4377 log(LOG_DEBUG, SPP_FMT "pap success",
4379 name_len = *((char *)h);
4380 if (len > 5 && name_len) {
4382 sppp_print_string((char*)(h+1), name_len);
4387 sp->pp_flags &= ~PP_NEEDAUTH;
4388 if (sp->myauth.proto == PPP_PAP &&
4389 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4390 (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
4392 * We are authenticator for PAP but didn't
4393 * complete yet. Leave it to tlu to proceed
4400 sppp_phase_network(sp);
4404 UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
4406 log(LOG_INFO, SPP_FMT "pap failure",
4408 name_len = *((char *)h);
4409 if (len > 5 && name_len) {
4411 sppp_print_string((char*)(h+1), name_len);
4415 log(LOG_INFO, SPP_FMT "pap failure\n",
4417 /* await LCP shutdown by authenticator */
4421 /* Unknown PAP packet type -- ignore. */
4423 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4424 "<0x%x id=0x%x len=%d",
4426 h->type, h->ident, ntohs(h->len));
4427 sppp_print_bytes((u_char*)(h+1), len-4);
4436 sppp_pap_init(struct sppp *sp)
4438 /* PAP doesn't have STATE_INITIAL at all. */
4439 sp->state[IDX_PAP] = STATE_CLOSED;
4440 sp->fail_counter[IDX_PAP] = 0;
4441 sp->pp_seq[IDX_PAP] = 0;
4442 sp->pp_rseq[IDX_PAP] = 0;
4443 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
4444 callout_handle_init(&sp->ch[IDX_PAP]);
4445 callout_handle_init(&sp->pap_my_to_ch);
4450 sppp_pap_open(struct sppp *sp)
4452 if (sp->hisauth.proto == PPP_PAP &&
4453 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4454 /* we are authenticator for PAP, start our timer */
4455 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4456 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4458 if (sp->myauth.proto == PPP_PAP) {
4459 /* we are peer, send a request, and start a timer */
4461 TIMEOUT(sppp_pap_my_TO, (void *)sp, sp->lcp.timeout,
4467 sppp_pap_close(struct sppp *sp)
4469 if (sp->state[IDX_PAP] != STATE_CLOSED)
4470 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4474 * That's the timeout routine if we are authenticator. Since the
4475 * authenticator is basically passive in PAP, we can't do much here.
4478 sppp_pap_TO(void *cookie)
4480 struct sppp *sp = (struct sppp *)cookie;
4486 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
4488 sppp_state_name(sp->state[IDX_PAP]),
4489 sp->rst_counter[IDX_PAP]);
4491 if (--sp->rst_counter[IDX_PAP] < 0)
4493 switch (sp->state[IDX_PAP]) {
4494 case STATE_REQ_SENT:
4496 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4500 /* TO+ event, not very much we could do */
4501 switch (sp->state[IDX_PAP]) {
4502 case STATE_REQ_SENT:
4503 /* sppp_cp_change_state() will restart the timer */
4504 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4512 * That's the timeout handler if we are peer. Since the peer is active,
4513 * we need to retransmit our PAP request since it is apparently lost.
4514 * XXX We should impose a max counter.
4517 sppp_pap_my_TO(void *cookie)
4519 struct sppp *sp = (struct sppp *)cookie;
4523 log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
4530 sppp_pap_tlu(struct sppp *sp)
4535 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4538 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
4539 SPP_ARGS(ifp), pap.name);
4542 /* indicate to LCP that we need to be closed down */
4543 sp->lcp.protos |= (1 << IDX_PAP);
4545 if (sp->pp_flags & PP_NEEDAUTH) {
4547 * Remote is authenticator, but his auth proto didn't
4548 * complete yet. Defer the transition to network
4555 sppp_phase_network(sp);
4559 sppp_pap_tld(struct sppp *sp)
4564 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
4565 UNTIMEOUT(pap.TO, (void *)sp, sp->ch[IDX_PAP]);
4566 UNTIMEOUT(sppp_pap_my_TO, (void *)sp, sp->pap_my_to_ch);
4567 sp->lcp.protos &= ~(1 << IDX_PAP);
4573 sppp_pap_scr(struct sppp *sp)
4575 u_char idlen, pwdlen;
4577 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP];
4578 pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
4579 idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
4581 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
4582 sizeof idlen, (const char *)&idlen,
4583 (size_t)idlen, sp->myauth.name,
4584 sizeof pwdlen, (const char *)&pwdlen,
4585 (size_t)pwdlen, sp->myauth.secret,
4590 * Random miscellaneous functions.
4594 * Send a PAP or CHAP proto packet.
4596 * Varadic function, each of the elements for the ellipsis is of type
4597 * ``size_t mlen, const u_char *msg''. Processing will stop iff
4599 * NOTE: never declare variadic functions with types subject to type
4600 * promotion (i.e. u_char). This is asking for big trouble depending
4601 * on the architecture you are on...
4605 sppp_auth_send(const struct cp *cp, struct sppp *sp,
4606 unsigned int type, unsigned int id,
4610 struct ppp_header *h;
4611 struct lcp_header *lh;
4619 MGETHDR (m, M_DONTWAIT, MT_DATA);
4622 m->m_pkthdr.rcvif = 0;
4624 h = mtod (m, struct ppp_header*);
4625 h->address = PPP_ALLSTATIONS; /* broadcast address */
4626 h->control = PPP_UI; /* Unnumbered Info */
4627 h->protocol = htons(cp->proto);
4629 lh = (struct lcp_header*)(h + 1);
4632 p = (u_char*) (lh+1);
4637 while ((mlen = (unsigned int)__va_arg(ap, size_t)) != 0) {
4638 msg = __va_arg(ap, const char *);
4640 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
4646 bcopy(msg, p, mlen);
4651 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
4652 lh->len = htons (LCP_HEADER_LEN + len);
4655 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
4656 SPP_ARGS(ifp), cp->name,
4657 sppp_auth_type_name(cp->proto, lh->type),
4658 lh->ident, ntohs(lh->len));
4659 sppp_print_bytes((u_char*) (lh+1), len);
4662 if (IF_QFULL (&sp->pp_cpq)) {
4663 IF_DROP (&sp->pp_fastq);
4664 IF_DROP (&ifp->if_snd);
4668 IF_ENQUEUE (&sp->pp_cpq, m);
4669 if (! (ifp->if_flags & IFF_OACTIVE))
4670 (*ifp->if_start) (ifp);
4671 ifp->if_obytes += m->m_pkthdr.len + 3;
4675 * Flush interface queue.
4678 sppp_qflush(struct ifqueue *ifq)
4693 * Send keepalive packets, every 10 seconds.
4696 sppp_keepalive(void *dummy)
4702 for (sp=spppq; sp; sp=sp->pp_next) {
4703 struct ifnet *ifp = &sp->pp_if;
4705 /* Keepalive mode disabled or channel down? */
4706 if (! (sp->pp_flags & PP_KEEPALIVE) ||
4707 ! (ifp->if_flags & IFF_RUNNING))
4710 /* No keepalive in PPP mode if LCP not opened yet. */
4711 if (sp->pp_mode != IFF_CISCO &&
4712 sp->pp_phase < PHASE_AUTHENTICATE)
4715 if (sp->pp_alivecnt == MAXALIVECNT) {
4716 /* No keepalive packets got. Stop the interface. */
4717 printf (SPP_FMT "down\n", SPP_ARGS(ifp));
4719 sppp_qflush (&sp->pp_cpq);
4720 if (sp->pp_mode != IFF_CISCO) {
4722 /* Shut down the PPP link. */
4724 /* Initiate negotiation. XXX */
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);
4741 TIMEOUT(sppp_keepalive, 0, hz * 10, keepalive_ch);
4745 * Get both IP addresses.
4748 sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
4750 struct ifnet *ifp = &sp->pp_if;
4752 struct sockaddr_in *si, *sm;
4758 * Pick the first AF_INET address from the list,
4759 * aliases don't make any sense on a p2p link anyway.
4762 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
4763 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4764 #elif defined(__NetBSD__) || defined (__OpenBSD__)
4765 for (ifa = ifp->if_addrlist.tqh_first;
4767 ifa = ifa->ifa_list.tqe_next)
4769 for (ifa = ifp->if_addrlist;
4771 ifa = ifa->ifa_next)
4773 if (ifa->ifa_addr->sa_family == AF_INET) {
4774 si = (struct sockaddr_in *)ifa->ifa_addr;
4775 sm = (struct sockaddr_in *)ifa->ifa_netmask;
4780 if (si && si->sin_addr.s_addr) {
4781 ssrc = si->sin_addr.s_addr;
4783 *srcmask = ntohl(sm->sin_addr.s_addr);
4786 si = (struct sockaddr_in *)ifa->ifa_dstaddr;
4787 if (si && si->sin_addr.s_addr)
4788 ddst = si->sin_addr.s_addr;
4791 if (dst) *dst = ntohl(ddst);
4792 if (src) *src = ntohl(ssrc);
4796 * Set my IP address. Must be called at splimp.
4799 sppp_set_ip_addr(struct sppp *sp, u_long src)
4803 struct sockaddr_in *si;
4804 struct in_ifaddr *ia;
4807 * Pick the first AF_INET address from the list,
4808 * aliases don't make any sense on a p2p link anyway.
4811 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
4812 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4813 #elif defined(__NetBSD__) || defined (__OpenBSD__)
4814 for (ifa = ifp->if_addrlist.tqh_first;
4816 ifa = ifa->ifa_list.tqe_next)
4818 for (ifa = ifp->if_addrlist;
4820 ifa = ifa->ifa_next)
4823 if (ifa->ifa_addr->sa_family == AF_INET)
4825 si = (struct sockaddr_in *)ifa->ifa_addr;
4834 #if __NetBSD_Version__ >= 103080000
4835 struct sockaddr_in new_sin = *si;
4837 new_sin.sin_addr.s_addr = htonl(src);
4838 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 1);
4841 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: in_ifinit "
4842 " failed, error=%d\n", SPP_ARGS(ifp), error);
4845 /* delete old route */
4846 error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
4849 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
4850 SPP_ARGS(ifp), error);
4853 /* set new address */
4854 si->sin_addr.s_addr = htonl(src);
4856 LIST_REMOVE(ia, ia_hash);
4857 LIST_INSERT_HEAD(INADDR_HASH(si->sin_addr.s_addr), ia, ia_hash);
4860 error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);
4863 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
4864 SPP_ARGS(ifp), error);
4872 * Get both IPv6 addresses.
4875 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst,
4876 struct in6_addr *srcmask)
4878 struct ifnet *ifp = &sp->pp_if;
4880 struct sockaddr_in6 *si, *sm;
4881 struct in6_addr ssrc, ddst;
4884 bzero(&ssrc, sizeof(ssrc));
4885 bzero(&ddst, sizeof(ddst));
4887 * Pick the first link-local AF_INET6 address from the list,
4888 * aliases don't make any sense on a p2p link anyway.
4890 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
4891 for (ifa = ifp->if_addrhead.tqh_first, si = 0;
4893 ifa = ifa->ifa_link.tqe_next)
4894 #elif defined(__NetBSD__) || defined (__OpenBSD__)
4895 for (ifa = ifp->if_addrlist.tqh_first, si = 0;
4897 ifa = ifa->ifa_list.tqe_next)
4899 for (ifa = ifp->if_addrlist, si = 0;
4901 ifa = ifa->ifa_next)
4903 if (ifa->ifa_addr->sa_family == AF_INET6) {
4904 si = (struct sockaddr_in6 *)ifa->ifa_addr;
4905 sm = (struct sockaddr_in6 *)ifa->ifa_netmask;
4906 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr))
4910 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) {
4911 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc));
4913 bcopy(&sm->sin6_addr, srcmask,
4918 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
4919 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr))
4920 bcopy(&si->sin6_addr, &ddst, sizeof(ddst));
4924 bcopy(&ddst, dst, sizeof(*dst));
4926 bcopy(&ssrc, src, sizeof(*src));
4929 #ifdef IPV6CP_MYIFID_DYN
4931 * Generate random ifid.
4934 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr)
4940 * Set my IPv6 address. Must be called at splimp.
4943 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src)
4947 struct sockaddr_in6 *sin6;
4950 * Pick the first link-local AF_INET6 address from the list,
4951 * aliases don't make any sense on a p2p link anyway.
4955 #if defined(__FreeBSD__) && __FreeBSD__ >= 3
4956 for (ifa = ifp->if_addrhead.tqh_first;
4958 ifa = ifa->ifa_link.tqe_next)
4959 #elif defined(__NetBSD__) || defined (__OpenBSD__)
4960 for (ifa = ifp->if_addrlist.tqh_first;
4962 ifa = ifa->ifa_list.tqe_next)
4964 for (ifa = ifp->if_addrlist; ifa; ifa = ifa->ifa_next)
4967 if (ifa->ifa_addr->sa_family == AF_INET6)
4969 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
4970 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
4978 struct sockaddr_in6 new_sin6 = *sin6;
4980 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr));
4981 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1);
4984 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit "
4985 " failed, error=%d\n", SPP_ARGS(ifp), error);
4992 * Suggest a candidate address to be used by peer.
4995 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest)
4997 struct in6_addr myaddr;
5000 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
5002 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */
5004 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) {
5005 myaddr.s6_addr[14] ^= 0xff;
5006 myaddr.s6_addr[15] ^= 0xff;
5008 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff);
5009 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff);
5012 bcopy(&myaddr, suggest, sizeof(myaddr));
5017 sppp_params(struct sppp *sp, u_long cmd, void *data)
5020 struct ifreq *ifr = (struct ifreq *)data;
5021 struct spppreq *spr;
5024 if ((spr = malloc(sizeof(struct spppreq), M_TEMP, M_NOWAIT)) == 0)
5027 * ifr->ifr_data is supposed to point to a struct spppreq.
5028 * Check the cmd word first before attempting to fetch all the
5031 if ((subcmd = fuword(ifr->ifr_data)) == -1) {
5036 if (copyin((caddr_t)ifr->ifr_data, spr, sizeof(struct spppreq)) != 0) {
5043 if (cmd != SIOCGIFGENERIC) {
5048 * We copy over the entire current state, but clean
5049 * out some of the stuff we don't wanna pass up.
5050 * Remember, SIOCGIFGENERIC is unprotected, and can be
5051 * called by any user. No need to ever get PAP or
5052 * CHAP secrets back to userland anyway.
5054 spr->defs.pp_phase = sp->pp_phase;
5055 spr->defs.enable_vj = (sp->confflags & CONF_ENABLE_VJ) != 0;
5056 spr->defs.enable_ipv6 = (sp->confflags & CONF_ENABLE_IPV6) != 0;
5057 spr->defs.lcp = sp->lcp;
5058 spr->defs.ipcp = sp->ipcp;
5059 spr->defs.ipv6cp = sp->ipv6cp;
5060 spr->defs.myauth = sp->myauth;
5061 spr->defs.hisauth = sp->hisauth;
5062 bzero(spr->defs.myauth.secret, AUTHKEYLEN);
5063 bzero(spr->defs.myauth.challenge, AUTHKEYLEN);
5064 bzero(spr->defs.hisauth.secret, AUTHKEYLEN);
5065 bzero(spr->defs.hisauth.challenge, AUTHKEYLEN);
5067 * Fixup the LCP timeout value to milliseconds so
5068 * spppcontrol doesn't need to bother about the value
5069 * of "hz". We do the reverse calculation below when
5072 spr->defs.lcp.timeout = sp->lcp.timeout * 1000 / hz;
5073 rv = copyout(spr, (caddr_t)ifr->ifr_data,
5074 sizeof(struct spppreq));
5078 if (cmd != SIOCSIFGENERIC) {
5083 * We have a very specific idea of which fields we
5084 * allow being passed back from userland, so to not
5085 * clobber our current state. For one, we only allow
5086 * setting anything if LCP is in dead or establish
5087 * phase. Once the authentication negotiations
5088 * started, the authentication settings must not be
5089 * changed again. (The administrator can force an
5090 * ifconfig down in order to get LCP back into dead
5093 * Also, we only allow for authentication parameters to be
5096 * XXX Should allow to set or clear pp_flags.
5098 * Finally, if the respective authentication protocol to
5099 * be used is set differently than 0, but the secret is
5100 * passed as all zeros, we don't trash the existing secret.
5101 * This allows an administrator to change the system name
5102 * only without clobbering the secret (which he didn't get
5103 * back in a previous SPPPIOGDEFS call). However, the
5104 * secrets are cleared if the authentication protocol is
5106 if (sp->pp_phase != PHASE_DEAD &&
5107 sp->pp_phase != PHASE_ESTABLISH) {
5112 if ((spr->defs.myauth.proto != 0 && spr->defs.myauth.proto != PPP_PAP &&
5113 spr->defs.myauth.proto != PPP_CHAP) ||
5114 (spr->defs.hisauth.proto != 0 && spr->defs.hisauth.proto != PPP_PAP &&
5115 spr->defs.hisauth.proto != PPP_CHAP)) {
5120 if (spr->defs.myauth.proto == 0)
5121 /* resetting myauth */
5122 bzero(&sp->myauth, sizeof sp->myauth);
5124 /* setting/changing myauth */
5125 sp->myauth.proto = spr->defs.myauth.proto;
5126 bcopy(spr->defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
5127 if (spr->defs.myauth.secret[0] != '\0')
5128 bcopy(spr->defs.myauth.secret, sp->myauth.secret,
5131 if (spr->defs.hisauth.proto == 0)
5132 /* resetting hisauth */
5133 bzero(&sp->hisauth, sizeof sp->hisauth);
5135 /* setting/changing hisauth */
5136 sp->hisauth.proto = spr->defs.hisauth.proto;
5137 sp->hisauth.flags = spr->defs.hisauth.flags;
5138 bcopy(spr->defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
5139 if (spr->defs.hisauth.secret[0] != '\0')
5140 bcopy(spr->defs.hisauth.secret, sp->hisauth.secret,
5143 /* set LCP restart timer timeout */
5144 if (spr->defs.lcp.timeout != 0)
5145 sp->lcp.timeout = spr->defs.lcp.timeout * hz / 1000;
5146 /* set VJ enable and IPv6 disable flags */
5148 if (spr->defs.enable_vj)
5149 sp->confflags |= CONF_ENABLE_VJ;
5151 sp->confflags &= ~CONF_ENABLE_VJ;
5154 if (spr->defs.enable_ipv6)
5155 sp->confflags |= CONF_ENABLE_IPV6;
5157 sp->confflags &= ~CONF_ENABLE_IPV6;
5172 sppp_phase_network(struct sppp *sp)
5178 sp->pp_phase = PHASE_NETWORK;
5181 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
5182 sppp_phase_name(sp->pp_phase));
5184 /* Notify NCPs now. */
5185 for (i = 0; i < IDX_COUNT; i++)
5186 if ((cps[i])->flags & CP_NCP)
5189 /* Send Up events to all NCPs. */
5190 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
5191 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP))
5194 /* if no NCP is starting, all this was in vain, close down */
5195 sppp_lcp_check_and_close(sp);
5200 sppp_cp_type_name(u_char type)
5202 static char buf[12];
5204 case CONF_REQ: return "conf-req";
5205 case CONF_ACK: return "conf-ack";
5206 case CONF_NAK: return "conf-nak";
5207 case CONF_REJ: return "conf-rej";
5208 case TERM_REQ: return "term-req";
5209 case TERM_ACK: return "term-ack";
5210 case CODE_REJ: return "code-rej";
5211 case PROTO_REJ: return "proto-rej";
5212 case ECHO_REQ: return "echo-req";
5213 case ECHO_REPLY: return "echo-reply";
5214 case DISC_REQ: return "discard-req";
5216 snprintf (buf, sizeof(buf), "cp/0x%x", type);
5221 sppp_auth_type_name(u_short proto, u_char type)
5223 static char buf[12];
5227 case CHAP_CHALLENGE: return "challenge";
5228 case CHAP_RESPONSE: return "response";
5229 case CHAP_SUCCESS: return "success";
5230 case CHAP_FAILURE: return "failure";
5234 case PAP_REQ: return "req";
5235 case PAP_ACK: return "ack";
5236 case PAP_NAK: return "nak";
5239 snprintf (buf, sizeof(buf), "auth/0x%x", type);
5244 sppp_lcp_opt_name(u_char opt)
5246 static char buf[12];
5248 case LCP_OPT_MRU: return "mru";
5249 case LCP_OPT_ASYNC_MAP: return "async-map";
5250 case LCP_OPT_AUTH_PROTO: return "auth-proto";
5251 case LCP_OPT_QUAL_PROTO: return "qual-proto";
5252 case LCP_OPT_MAGIC: return "magic";
5253 case LCP_OPT_PROTO_COMP: return "proto-comp";
5254 case LCP_OPT_ADDR_COMP: return "addr-comp";
5256 snprintf (buf, sizeof(buf), "lcp/0x%x", opt);
5261 sppp_ipcp_opt_name(u_char opt)
5263 static char buf[12];
5265 case IPCP_OPT_ADDRESSES: return "addresses";
5266 case IPCP_OPT_COMPRESSION: return "compression";
5267 case IPCP_OPT_ADDRESS: return "address";
5269 snprintf (buf, sizeof(buf), "ipcp/0x%x", opt);
5275 sppp_ipv6cp_opt_name(u_char opt)
5277 static char buf[12];
5279 case IPV6CP_OPT_IFID: return "ifid";
5280 case IPV6CP_OPT_COMPRESSION: return "compression";
5282 sprintf (buf, "0x%x", opt);
5288 sppp_state_name(int state)
5291 case STATE_INITIAL: return "initial";
5292 case STATE_STARTING: return "starting";
5293 case STATE_CLOSED: return "closed";
5294 case STATE_STOPPED: return "stopped";
5295 case STATE_CLOSING: return "closing";
5296 case STATE_STOPPING: return "stopping";
5297 case STATE_REQ_SENT: return "req-sent";
5298 case STATE_ACK_RCVD: return "ack-rcvd";
5299 case STATE_ACK_SENT: return "ack-sent";
5300 case STATE_OPENED: return "opened";
5306 sppp_phase_name(enum ppp_phase phase)
5309 case PHASE_DEAD: return "dead";
5310 case PHASE_ESTABLISH: return "establish";
5311 case PHASE_TERMINATE: return "terminate";
5312 case PHASE_AUTHENTICATE: return "authenticate";
5313 case PHASE_NETWORK: return "network";
5319 sppp_proto_name(u_short proto)
5321 static char buf[12];
5323 case PPP_LCP: return "lcp";
5324 case PPP_IPCP: return "ipcp";
5325 case PPP_PAP: return "pap";
5326 case PPP_CHAP: return "chap";
5327 case PPP_IPV6CP: return "ipv6cp";
5329 snprintf(buf, sizeof(buf), "proto/0x%x", (unsigned)proto);
5334 sppp_print_bytes(const u_char *p, u_short len)
5337 addlog(" %*D", len, p, "-");
5341 sppp_print_string(const char *p, u_short len)
5348 * Print only ASCII chars directly. RFC 1994 recommends
5349 * using only them, but we don't rely on it. */
5350 if (c < ' ' || c > '~')
5358 sppp_dotted_quad(u_long addr)
5361 sprintf(s, "%d.%d.%d.%d",
5362 (int)((addr >> 24) & 0xff),
5363 (int)((addr >> 16) & 0xff),
5364 (int)((addr >> 8) & 0xff),
5365 (int)(addr & 0xff));
5370 sppp_strnlen(u_char *p, int max)
5374 for (len = 0; len < max && *p; ++p)
5379 /* a dummy, used to drop uninteresting events */
5381 sppp_null(struct sppp *unused)
5383 /* do just nothing */