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 1.35 2008/06/09 11:24:24 sephe Exp $
24 #include <sys/param.h>
26 #if defined(__DragonFly__)
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(__DragonFly__)
47 #include <sys/random.h>
48 #include <sys/thread2.h>
50 #include <sys/malloc.h>
53 #if defined (__OpenBSD__)
60 #include <net/ifq_var.h>
61 #include <net/netisr.h>
62 #include <net/if_types.h>
63 #include <net/route.h>
64 #include <netinet/in.h>
65 #include <netinet/in_systm.h>
66 #include <netinet/ip.h>
67 #include <net/slcompress.h>
69 #if defined (__NetBSD__) || defined (__OpenBSD__)
70 #include <machine/cpu.h> /* XXX for softnet */
73 #include <machine/stdarg.h>
75 #include <netinet/in.h>
76 #include <netinet/in_systm.h>
77 #include <netinet/in_var.h>
80 #include <netinet/ip.h>
81 #include <netinet/tcp.h>
84 #if defined (__DragonFly__) || defined (__OpenBSD__)
85 # include <netinet/if_ether.h>
87 # include <net/ethertypes.h>
91 #include <netproto/ipx/ipx.h>
92 #include <netproto/ipx/ipx_if.h>
97 #define IOCTL_CMD_T u_long
98 #define MAXALIVECNT 3 /* max. alive packets */
101 * Interface flags that can be set in an ifconfig command.
103 * Setting link0 will make the link passive, i.e. it will be marked
104 * as being administrative openable, but won't be opened to begin
105 * with. Incoming calls will be answered, or subsequent calls with
106 * -link1 will cause the administrative open of the LCP layer.
108 * Setting link1 will cause the link to auto-dial only as packets
111 * Setting IFF_DEBUG will syslog the option negotiation and state
112 * transitions at level kern.debug. Note: all logs consistently look
115 * <if-name><unit>: <proto-name> <additional info...>
117 * with <if-name><unit> being something like "bppp0", and <proto-name>
118 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
121 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
122 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */
123 #define IFF_CISCO IFF_LINK2 /* auto-dial on output */
125 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
126 #define PPP_UI 0x03 /* Unnumbered Information */
127 #define PPP_IP 0x0021 /* Internet Protocol */
128 #define PPP_ISO 0x0023 /* ISO OSI Protocol */
129 #define PPP_XNS 0x0025 /* Xerox NS Protocol */
130 #define PPP_IPX 0x002b /* Novell IPX Protocol */
131 #define PPP_VJ_COMP 0x002d /* VJ compressed TCP/IP */
132 #define PPP_VJ_UCOMP 0x002f /* VJ uncompressed TCP/IP */
133 #define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */
134 #define PPP_LCP 0xc021 /* Link Control Protocol */
135 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
136 #define PPP_CHAP 0xc223 /* Challenge-Handshake Auth Protocol */
137 #define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */
138 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
140 #define CONF_REQ 1 /* PPP configure request */
141 #define CONF_ACK 2 /* PPP configure acknowledge */
142 #define CONF_NAK 3 /* PPP configure negative ack */
143 #define CONF_REJ 4 /* PPP configure reject */
144 #define TERM_REQ 5 /* PPP terminate request */
145 #define TERM_ACK 6 /* PPP terminate acknowledge */
146 #define CODE_REJ 7 /* PPP code reject */
147 #define PROTO_REJ 8 /* PPP protocol reject */
148 #define ECHO_REQ 9 /* PPP echo request */
149 #define ECHO_REPLY 10 /* PPP echo reply */
150 #define DISC_REQ 11 /* PPP discard request */
152 #define LCP_OPT_MRU 1 /* maximum receive unit */
153 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */
154 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */
155 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */
156 #define LCP_OPT_MAGIC 5 /* magic number */
157 #define LCP_OPT_RESERVED 6 /* reserved */
158 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */
159 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */
161 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */
162 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol (VJ) */
163 #define IPCP_OPT_ADDRESS 3 /* local IP address */
165 #define IPV6CP_OPT_IFID 1 /* interface identifier */
166 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */
168 #define IPCP_COMP_VJ 0x2d /* Code for VJ compression */
170 #define PAP_REQ 1 /* PAP name/password request */
171 #define PAP_ACK 2 /* PAP acknowledge */
172 #define PAP_NAK 3 /* PAP fail */
174 #define CHAP_CHALLENGE 1 /* CHAP challenge request */
175 #define CHAP_RESPONSE 2 /* CHAP challenge response */
176 #define CHAP_SUCCESS 3 /* CHAP response ok */
177 #define CHAP_FAILURE 4 /* CHAP response failed */
179 #define CHAP_MD5 5 /* hash algorithm - MD5 */
181 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */
182 #define CISCO_UNICAST 0x0f /* Cisco unicast address */
183 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
184 #define CISCO_ADDR_REQ 0 /* Cisco address request */
185 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */
186 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
188 /* states are named and numbered according to RFC 1661 */
189 #define STATE_INITIAL 0
190 #define STATE_STARTING 1
191 #define STATE_CLOSED 2
192 #define STATE_STOPPED 3
193 #define STATE_CLOSING 4
194 #define STATE_STOPPING 5
195 #define STATE_REQ_SENT 6
196 #define STATE_ACK_RCVD 7
197 #define STATE_ACK_SENT 8
198 #define STATE_OPENED 9
204 } __attribute__((__packed__));
205 #define PPP_HEADER_LEN sizeof (struct ppp_header)
211 } __attribute__((__packed__));
212 #define LCP_HEADER_LEN sizeof (struct lcp_header)
214 struct cisco_packet {
221 } __attribute__((__packed__));
222 #define CISCO_PACKET_LEN sizeof (struct cisco_packet)
225 * We follow the spelling and capitalization of RFC 1661 here, to make
226 * it easier comparing with the standard. Please refer to this RFC in
227 * case you can't make sense out of these abbreviation; it will also
228 * explain the semantics related to the various events and actions.
231 u_short proto; /* PPP control protocol number */
232 u_char protoidx; /* index into state table in struct sppp */
234 #define CP_LCP 0x01 /* this is the LCP */
235 #define CP_AUTH 0x02 /* this is an authentication protocol */
236 #define CP_NCP 0x04 /* this is a NCP */
237 #define CP_QUAL 0x08 /* this is a quality reporting protocol */
238 const char *name; /* name of this control protocol */
240 void (*Up)(struct sppp *sp);
241 void (*Down)(struct sppp *sp);
242 void (*Open)(struct sppp *sp);
243 void (*Close)(struct sppp *sp);
244 void (*TO)(void *sp);
245 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len);
246 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len);
247 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len);
249 void (*tlu)(struct sppp *sp);
250 void (*tld)(struct sppp *sp);
251 void (*tls)(struct sppp *sp);
252 void (*tlf)(struct sppp *sp);
253 void (*scr)(struct sppp *sp);
256 static struct sppp *spppq;
257 #if defined(__DragonFly__)
258 static struct callout keepalive_timeout;
261 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 && !defined(__DragonFly__)
262 #define SPP_FMT "%s%d: "
263 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit
265 #define SPP_FMT "%s: "
266 #define SPP_ARGS(ifp) (ifp)->if_xname
271 * The following disgusting hack gets around the problem that IP TOS
272 * can't be set yet. We want to put "interactive" traffic on a high
273 * priority queue. To decide if traffic is interactive, we check that
274 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
276 * XXX is this really still necessary? - joerg -
278 static u_short interactive_ports[8] = {
282 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
285 /* almost every function needs these */
287 struct ifnet *ifp = &sp->pp_if; \
288 int debug = ifp->if_flags & IFF_DEBUG
290 static int sppp_output(struct ifnet *ifp, struct mbuf *m,
291 struct sockaddr *dst, struct rtentry *rt);
293 static void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2);
294 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m);
296 static void sppp_cp_input(const struct cp *cp, struct sppp *sp,
298 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
299 u_char ident, u_short len, void *data);
300 /* static void sppp_cp_timeout(void *arg); */
301 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp,
303 static void sppp_auth_send(const struct cp *cp,
304 struct sppp *sp, unsigned int type, unsigned int id,
307 static void sppp_up_event(const struct cp *cp, struct sppp *sp);
308 static void sppp_down_event(const struct cp *cp, struct sppp *sp);
309 static void sppp_open_event(const struct cp *cp, struct sppp *sp);
310 static void sppp_close_event(const struct cp *cp, struct sppp *sp);
311 static void sppp_to_event(const struct cp *cp, struct sppp *sp);
313 static void sppp_null(struct sppp *sp);
315 static void sppp_lcp_init(struct sppp *sp);
316 static void sppp_lcp_up(struct sppp *sp);
317 static void sppp_lcp_down(struct sppp *sp);
318 static void sppp_lcp_open(struct sppp *sp);
319 static void sppp_lcp_close(struct sppp *sp);
320 static void sppp_lcp_TO(void *sp);
321 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
322 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
323 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
324 static void sppp_lcp_tlu(struct sppp *sp);
325 static void sppp_lcp_tld(struct sppp *sp);
326 static void sppp_lcp_tls(struct sppp *sp);
327 static void sppp_lcp_tlf(struct sppp *sp);
328 static void sppp_lcp_scr(struct sppp *sp);
329 static void sppp_lcp_check_and_close(struct sppp *sp);
330 static int sppp_ncp_check(struct sppp *sp);
332 static void sppp_ipcp_init(struct sppp *sp);
333 static void sppp_ipcp_up(struct sppp *sp);
334 static void sppp_ipcp_down(struct sppp *sp);
335 static void sppp_ipcp_open(struct sppp *sp);
336 static void sppp_ipcp_close(struct sppp *sp);
337 static void sppp_ipcp_TO(void *sp);
338 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
339 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
340 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
341 static void sppp_ipcp_tlu(struct sppp *sp);
342 static void sppp_ipcp_tld(struct sppp *sp);
343 static void sppp_ipcp_tls(struct sppp *sp);
344 static void sppp_ipcp_tlf(struct sppp *sp);
345 static void sppp_ipcp_scr(struct sppp *sp);
347 static void sppp_ipv6cp_init(struct sppp *sp);
348 static void sppp_ipv6cp_up(struct sppp *sp);
349 static void sppp_ipv6cp_down(struct sppp *sp);
350 static void sppp_ipv6cp_open(struct sppp *sp);
351 static void sppp_ipv6cp_close(struct sppp *sp);
352 static void sppp_ipv6cp_TO(void *sp);
353 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len);
354 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
355 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
356 static void sppp_ipv6cp_tlu(struct sppp *sp);
357 static void sppp_ipv6cp_tld(struct sppp *sp);
358 static void sppp_ipv6cp_tls(struct sppp *sp);
359 static void sppp_ipv6cp_tlf(struct sppp *sp);
360 static void sppp_ipv6cp_scr(struct sppp *sp);
362 static void sppp_pap_input(struct sppp *sp, struct mbuf *m);
363 static void sppp_pap_init(struct sppp *sp);
364 static void sppp_pap_open(struct sppp *sp);
365 static void sppp_pap_close(struct sppp *sp);
366 static void sppp_pap_TO(void *sp);
367 static void sppp_pap_my_TO(void *sp);
368 static void sppp_pap_tlu(struct sppp *sp);
369 static void sppp_pap_tld(struct sppp *sp);
370 static void sppp_pap_scr(struct sppp *sp);
372 static void sppp_chap_input(struct sppp *sp, struct mbuf *m);
373 static void sppp_chap_init(struct sppp *sp);
374 static void sppp_chap_open(struct sppp *sp);
375 static void sppp_chap_close(struct sppp *sp);
376 static void sppp_chap_TO(void *sp);
377 static void sppp_chap_tlu(struct sppp *sp);
378 static void sppp_chap_tld(struct sppp *sp);
379 static void sppp_chap_scr(struct sppp *sp);
381 static const char *sppp_auth_type_name(u_short proto, u_char type);
382 static const char *sppp_cp_type_name(u_char type);
383 static const char *sppp_dotted_quad(u_long addr);
384 static const char *sppp_ipcp_opt_name(u_char opt);
386 static const char *sppp_ipv6cp_opt_name(u_char opt);
388 static const char *sppp_lcp_opt_name(u_char opt);
389 static const char *sppp_phase_name(enum ppp_phase phase);
390 static const char *sppp_proto_name(u_short proto);
391 static const char *sppp_state_name(int state);
392 static int sppp_params(struct sppp *sp, u_long cmd, void *data);
393 static int sppp_strnlen(u_char *p, int max);
394 static void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst,
396 static void sppp_keepalive(void *dummy);
397 static void sppp_phase_network(struct sppp *sp);
398 static void sppp_print_bytes(const u_char *p, u_short len);
399 static void sppp_print_string(const char *p, u_short len);
400 static void sppp_set_ip_addr(struct sppp *sp, u_long src);
402 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src,
403 struct in6_addr *dst, struct in6_addr *srcmask);
404 #ifdef IPV6CP_MYIFID_DYN
405 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src);
406 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src);
408 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src);
411 /* our control protocol descriptors */
412 static const struct cp lcp = {
413 PPP_LCP, IDX_LCP, CP_LCP, "lcp",
414 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close,
415 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak,
416 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf,
420 static const struct cp ipcp = {
421 PPP_IPCP, IDX_IPCP, CP_NCP, "ipcp",
422 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close,
423 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak,
424 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf,
428 static const struct cp ipv6cp = {
429 PPP_IPV6CP, IDX_IPV6CP,
430 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/
436 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close,
437 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak,
438 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf,
442 static const struct cp pap = {
443 PPP_PAP, IDX_PAP, CP_AUTH, "pap",
444 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close,
445 sppp_pap_TO, 0, 0, 0,
446 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null,
450 static const struct cp chap = {
451 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap",
452 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close,
453 sppp_chap_TO, 0, 0, 0,
454 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null,
458 static const struct cp *cps[IDX_COUNT] = {
460 &ipcp, /* IDX_IPCP */
461 &ipv6cp, /* IDX_IPV6CP */
463 &chap, /* IDX_CHAP */
467 sppp_modevent(module_t mod, int type, void *unused)
471 callout_init(&keepalive_timeout);
481 static moduledata_t spppmod = {
486 MODULE_VERSION(sppp, 1);
487 DECLARE_MODULE(sppp, spppmod, SI_SUB_DRIVERS, SI_ORDER_ANY);
490 * Exported functions, comprising our interface to the lower layer.
494 * Process the received packet.
497 sppp_input(struct ifnet *ifp, struct mbuf *m)
499 struct ppp_header *h;
501 struct sppp *sp = (struct sppp *)ifp;
503 int hlen, vjlen, do_account = 0;
504 int debug = ifp->if_flags & IFF_DEBUG;
506 if (ifp->if_flags & IFF_UP)
507 /* Count received bytes, add FCS and one flag */
508 ifp->if_ibytes += m->m_pkthdr.len + 3;
510 if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
511 /* Too small packet, drop it. */
514 SPP_FMT "input packet is too small, %d bytes\n",
515 SPP_ARGS(ifp), m->m_pkthdr.len);
524 /* Get PPP header. */
525 h = mtod (m, struct ppp_header*);
526 m_adj (m, PPP_HEADER_LEN);
528 switch (h->address) {
529 case PPP_ALLSTATIONS:
530 if (h->control != PPP_UI)
532 if (sp->pp_mode == IFF_CISCO) {
535 SPP_FMT "PPP packet in Cisco mode "
536 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
538 h->address, h->control, ntohs(h->protocol));
541 switch (ntohs (h->protocol)) {
545 SPP_FMT "rejecting protocol "
546 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
548 h->address, h->control, ntohs(h->protocol));
549 if (sp->state[IDX_LCP] == STATE_OPENED)
550 sppp_cp_send (sp, PPP_LCP, PROTO_REJ,
551 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2,
556 sppp_cp_input(&lcp, sp, m);
560 if (sp->pp_phase >= PHASE_AUTHENTICATE)
561 sppp_pap_input(sp, m);
565 if (sp->pp_phase >= PHASE_AUTHENTICATE)
566 sppp_chap_input(sp, m);
571 if (sp->pp_phase == PHASE_NETWORK)
572 sppp_cp_input(&ipcp, sp, m);
576 if (sp->state[IDX_IPCP] == STATE_OPENED) {
582 if (sp->state[IDX_IPCP] == STATE_OPENED) {
584 sl_uncompress_tcp_core(mtod(m, u_char *),
588 &iphdr, &hlen)) <= 0) {
591 SPP_FMT "VJ uncompress failed on compressed packet\n",
597 * Trim the VJ header off the packet, and prepend
598 * the uncompressed IP header (which will usually
599 * end up in two chained mbufs since there's not
600 * enough leading space in the existing mbuf).
603 M_PREPEND(m, hlen, MB_DONTWAIT);
606 bcopy(iphdr, mtod(m, u_char *), hlen);
613 if (sp->state[IDX_IPCP] == STATE_OPENED) {
614 if (sl_uncompress_tcp_core(mtod(m, u_char *),
616 TYPE_UNCOMPRESSED_TCP,
618 &iphdr, &hlen) != 0) {
621 SPP_FMT "VJ uncompress failed on uncompressed packet\n",
632 if (sp->pp_phase == PHASE_NETWORK)
633 sppp_cp_input(&ipv6cp, sp, m);
638 if (sp->state[IDX_IPV6CP] == STATE_OPENED) {
646 /* IPX IPXCP not implemented yet */
647 if (sp->pp_phase == PHASE_NETWORK) {
655 case CISCO_MULTICAST:
657 /* Don't check the control field here (RFC 1547). */
658 if (sp->pp_mode != IFF_CISCO) {
661 SPP_FMT "Cisco packet in PPP mode "
662 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
664 h->address, h->control, ntohs(h->protocol));
667 switch (ntohs (h->protocol)) {
671 case CISCO_KEEPALIVE:
672 sppp_cisco_input ((struct sppp*) ifp, m);
695 default: /* Invalid PPP packet. */
699 SPP_FMT "invalid input packet "
700 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
702 h->address, h->control, ntohs(h->protocol));
706 if (! (ifp->if_flags & IFF_UP) || isr < 0)
711 netisr_queue(isr, m);
714 * Do only account for network packets, not for control
715 * packets. This is used by some subsystems to detect
719 sp->pp_last_recv = time_second;
723 * Enqueue transmit packet.
726 sppp_output_serialized(struct ifnet *ifp, struct mbuf *m,
727 struct sockaddr *dst, struct rtentry *rt)
729 struct sppp *sp = (struct sppp*) ifp;
730 struct ppp_header *h;
731 struct ifqueue *ifq = NULL;
733 int ipproto = PPP_IP;
734 int debug = ifp->if_flags & IFF_DEBUG;
735 struct altq_pktattr pktattr;
739 if ((ifp->if_flags & IFF_UP) == 0 ||
740 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) {
749 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) {
754 * Hack to prevent the initialization-time generated
755 * IPv6 multicast packet to erroneously cause a
756 * dialout event in case IPv6 has been
757 * administratively disabled on that interface.
759 if (dst->sa_family == AF_INET6 &&
760 !(sp->confflags & CONF_ENABLE_IPV6))
764 * Interface is not yet running, but auto-dial. Need
765 * to start LCP for it.
767 ifp->if_flags |= IFF_RUNNING;
774 * if the queueing discipline needs packet classification,
775 * do it before prepending link headers.
777 ifq_classify(&ifp->if_snd, m, dst->sa_family, &pktattr);
780 if (dst->sa_family == AF_INET) {
781 /* XXX Check mbuf length here? */
782 struct ip *ip = mtod (m, struct ip*);
783 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
786 * When using dynamic local IP address assignment by using
787 * 0.0.0.0 as a local address, the first TCP session will
788 * not connect because the local TCP checksum is computed
789 * using 0.0.0.0 which will later become our real IP address
790 * so the TCP checksum computed at the remote end will
791 * become invalid. So we
792 * - don't let packets with src ip addr 0 thru
793 * - we flag TCP packets with src ip 0 as an error
796 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */
800 if(ip->ip_p == IPPROTO_TCP)
801 return(EADDRNOTAVAIL);
807 * Put low delay, telnet, rlogin and ftp control packets
808 * in front of the queue.
810 if (IF_QFULL (&sp->pp_fastq))
812 else if (ip->ip_tos & IPTOS_LOWDELAY)
814 else if (m->m_len < sizeof *ip + sizeof *tcp)
816 else if (ip->ip_p != IPPROTO_TCP)
818 else if (INTERACTIVE (ntohs (tcp->th_sport)))
820 else if (INTERACTIVE (ntohs (tcp->th_dport)))
824 * Do IP Header compression
826 if (sp->pp_mode != IFF_CISCO && (sp->ipcp.flags & IPCP_VJ) &&
827 ip->ip_p == IPPROTO_TCP)
828 switch (sl_compress_tcp(m, ip, sp->pp_comp,
829 sp->ipcp.compress_cid)) {
830 case TYPE_COMPRESSED_TCP:
831 ipproto = PPP_VJ_COMP;
833 case TYPE_UNCOMPRESSED_TCP:
834 ipproto = PPP_VJ_UCOMP;
848 if (dst->sa_family == AF_INET6) {
849 /* XXX do something tricky here? */
854 * Prepend general data packet PPP header. For now, IP only.
856 M_PREPEND (m, PPP_HEADER_LEN, MB_DONTWAIT);
859 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
866 * May want to check size of packet
867 * (albeit due to the implementation it's always enough)
869 h = mtod (m, struct ppp_header*);
870 if (sp->pp_mode == IFF_CISCO) {
871 h->address = CISCO_UNICAST; /* unicast address */
874 h->address = PPP_ALLSTATIONS; /* broadcast address */
875 h->control = PPP_UI; /* Unnumbered Info */
878 switch (dst->sa_family) {
880 case AF_INET: /* Internet Protocol */
881 if (sp->pp_mode == IFF_CISCO)
882 h->protocol = htons (ETHERTYPE_IP);
885 * Don't choke with an ENETDOWN early. It's
886 * possible that we just started dialing out,
887 * so don't drop the packet immediately. If
888 * we notice that we run out of buffer space
889 * below, we will however remember that we are
890 * not ready to carry IP packets, and return
891 * ENETDOWN, as opposed to ENOBUFS.
893 h->protocol = htons(ipproto);
894 if (sp->state[IDX_IPCP] != STATE_OPENED)
900 case AF_INET6: /* Internet Protocol */
901 if (sp->pp_mode == IFF_CISCO)
902 h->protocol = htons (ETHERTYPE_IPV6);
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(PPP_IPV6);
914 if (sp->state[IDX_IPV6CP] != STATE_OPENED)
920 case AF_IPX: /* Novell IPX Protocol */
921 h->protocol = htons (sp->pp_mode == IFF_CISCO ?
922 ETHERTYPE_IPX : PPP_IPX);
929 return (EAFNOSUPPORT);
933 * Queue message on interface, and start output if interface
947 rv = ifq_enqueue(&ifp->if_snd, m, &pktattr);
954 if (! (ifp->if_flags & IFF_OACTIVE))
955 (*ifp->if_start) (ifp);
958 * Count output packets and bytes.
959 * The packet length includes header, FCS and 1 flag,
960 * according to RFC 1333.
962 ifp->if_obytes += m->m_pkthdr.len + 3;
965 * Unlike in sppp_input(), we can always bump the timestamp
966 * here since sppp_output() is only called on behalf of
967 * network-layer traffic; control-layer traffic is handled
970 sp->pp_last_sent = time_second;
977 sppp_output(struct ifnet *ifp, struct mbuf *m,
978 struct sockaddr *dst, struct rtentry *rt)
982 ifnet_serialize_tx(ifp);
983 error = sppp_output_serialized(ifp, m, dst, rt);
984 ifnet_deserialize_tx(ifp);
990 sppp_attach(struct ifnet *ifp)
992 struct sppp *sp = (struct sppp*) ifp;
994 /* Initialize keepalive handler. */
996 callout_reset(&keepalive_timeout, hz * 10,
997 sppp_keepalive, NULL);
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 = kmalloc(sizeof(struct slcompress), M_TEMP, M_WAITOK);
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 callout_stop(&keepalive_timeout);
1054 for (i = 0; i < IDX_COUNT; i++)
1055 callout_stop(&sp->timeout[i]);
1056 callout_stop(&sp->pap_my_to);
1060 * Flush the interface output queue.
1063 sppp_flush(struct ifnet *ifp)
1065 struct sppp *sp = (struct sppp*) ifp;
1067 ifq_purge(&sp->pp_if.if_snd);
1068 IF_DRAIN(&sp->pp_fastq);
1069 IF_DRAIN(&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 = IF_QEMPTY(&sp->pp_fastq) && IF_QEMPTY(&sp->pp_cpq) &&
1083 ifq_is_empty(&sp->pp_if.if_snd);
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 m = ifq_dequeue(&sp->pp_if.if_snd, NULL);
1118 * Pick the next packet, do not remove it from the queue.
1121 sppp_pick(struct ifnet *ifp)
1123 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 = ifq_poll(&sp->pp_if.if_snd);
1140 * Process an ioctl request. Called on low priority level.
1143 sppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
1145 struct ifreq *ifr = (struct ifreq*) data;
1146 struct sppp *sp = (struct sppp*) ifp;
1147 int rv, going_up, going_down, newmode;
1154 case SIOCSIFDSTADDR:
1158 /* set the interface "up" when assigning an IP address */
1159 ifp->if_flags |= IFF_UP;
1160 /* fall through... */
1163 going_up = ifp->if_flags & IFF_UP &&
1164 (ifp->if_flags & IFF_RUNNING) == 0;
1165 going_down = (ifp->if_flags & IFF_UP) == 0 &&
1166 ifp->if_flags & IFF_RUNNING;
1168 newmode = ifp->if_flags & IFF_PASSIVE;
1170 newmode = ifp->if_flags & IFF_AUTO;
1172 newmode = ifp->if_flags & IFF_CISCO;
1173 ifp->if_flags &= ~(IFF_PASSIVE | IFF_AUTO | IFF_CISCO);
1174 ifp->if_flags |= newmode;
1176 if (newmode != sp->pp_mode) {
1179 going_up = ifp->if_flags & IFF_RUNNING;
1183 if (sp->pp_mode != IFF_CISCO)
1185 else if (sp->pp_tlf)
1188 ifp->if_flags &= ~IFF_RUNNING;
1189 sp->pp_mode = newmode;
1193 if (sp->pp_mode != IFF_CISCO)
1195 sp->pp_mode = newmode;
1196 if (sp->pp_mode == 0) {
1197 ifp->if_flags |= IFF_RUNNING;
1200 if (sp->pp_mode == IFF_CISCO) {
1203 ifp->if_flags |= IFF_RUNNING;
1211 #define ifr_mtu ifr_metric
1214 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru)
1216 ifp->if_mtu = ifr->ifr_mtu;
1221 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru)
1223 ifp->if_mtu = *(short*)data;
1228 ifr->ifr_mtu = ifp->if_mtu;
1233 *(short*)data = ifp->if_mtu;
1240 case SIOCGIFGENERIC:
1241 case SIOCSIFGENERIC:
1242 rv = sppp_params(sp, cmd, data);
1254 * Cisco framing implementation.
1258 * Handle incoming Cisco keepalive protocol packets.
1261 sppp_cisco_input(struct sppp *sp, struct mbuf *m)
1264 struct cisco_packet *h;
1267 if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
1270 SPP_FMT "cisco invalid packet length: %d bytes\n",
1271 SPP_ARGS(ifp), m->m_pkthdr.len);
1274 h = mtod (m, struct cisco_packet*);
1277 SPP_FMT "cisco input: %d bytes "
1278 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1279 SPP_ARGS(ifp), m->m_pkthdr.len,
1280 (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel,
1281 (u_int)h->time0, (u_int)h->time1);
1282 switch (ntohl (h->type)) {
1285 log(-1, SPP_FMT "cisco unknown packet type: 0x%lx\n",
1286 SPP_ARGS(ifp), (u_long)ntohl (h->type));
1288 case CISCO_ADDR_REPLY:
1289 /* Reply on address request, ignore */
1291 case CISCO_KEEPALIVE_REQ:
1292 sp->pp_alivecnt = 0;
1293 sp->pp_rseq[IDX_LCP] = ntohl (h->par1);
1294 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) {
1295 /* Local and remote sequence numbers are equal.
1296 * Probably, the line is in loopback mode. */
1297 if (sp->pp_loopcnt >= MAXALIVECNT) {
1298 kprintf (SPP_FMT "loopback\n",
1301 if (ifp->if_flags & IFF_UP) {
1303 IF_DRAIN(&sp->pp_cpq);
1308 /* Generate new local sequence number */
1309 #if defined(__DragonFly__)
1310 sp->pp_seq[IDX_LCP] = krandom();
1312 sp->pp_seq[IDX_LCP] ^= time.tv_sec ^ time.tv_usec;
1317 if (! (ifp->if_flags & IFF_UP) &&
1318 (ifp->if_flags & IFF_RUNNING)) {
1320 kprintf (SPP_FMT "up\n", SPP_ARGS(ifp));
1323 case CISCO_ADDR_REQ:
1324 sppp_get_ip_addrs(sp, &me, 0, &mymask);
1326 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
1332 * Send Cisco keepalive packet.
1335 sppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
1338 struct ppp_header *h;
1339 struct cisco_packet *ch;
1341 #if defined(__DragonFly__)
1344 u_long t = (time.tv_sec - boottime.tv_sec) * 1000;
1347 #if defined(__DragonFly__)
1348 getmicrouptime(&tv);
1351 MGETHDR (m, MB_DONTWAIT, MT_DATA);
1354 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
1355 m->m_pkthdr.rcvif = 0;
1357 h = mtod (m, struct ppp_header*);
1358 h->address = CISCO_MULTICAST;
1360 h->protocol = htons (CISCO_KEEPALIVE);
1362 ch = (struct cisco_packet*) (h + 1);
1363 ch->type = htonl (type);
1364 ch->par1 = htonl (par1);
1365 ch->par2 = htonl (par2);
1368 #if defined(__DragonFly__)
1369 ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
1370 ch->time1 = htons ((u_short) tv.tv_sec);
1372 ch->time0 = htons ((u_short) (t >> 16));
1373 ch->time1 = htons ((u_short) t);
1378 SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1379 SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1,
1380 (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
1382 if (IF_QFULL (&sp->pp_cpq)) {
1383 IF_DROP (&sp->pp_fastq);
1384 IF_DROP (&ifp->if_snd);
1387 IF_ENQUEUE (&sp->pp_cpq, m);
1388 if (! (ifp->if_flags & IFF_OACTIVE))
1389 (*ifp->if_start) (ifp);
1390 ifp->if_obytes += m->m_pkthdr.len + 3;
1394 * PPP protocol implementation.
1398 * Send PPP control protocol packet.
1401 sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
1402 u_char ident, u_short len, void *data)
1405 struct ppp_header *h;
1406 struct lcp_header *lh;
1409 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
1410 len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
1411 MGETHDR (m, MB_DONTWAIT, MT_DATA);
1414 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
1415 m->m_pkthdr.rcvif = 0;
1417 h = mtod (m, struct ppp_header*);
1418 h->address = PPP_ALLSTATIONS; /* broadcast address */
1419 h->control = PPP_UI; /* Unnumbered Info */
1420 h->protocol = htons (proto); /* Link Control Protocol */
1422 lh = (struct lcp_header*) (h + 1);
1425 lh->len = htons (LCP_HEADER_LEN + len);
1427 bcopy (data, lh+1, len);
1430 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
1432 sppp_proto_name(proto),
1433 sppp_cp_type_name (lh->type), lh->ident,
1435 sppp_print_bytes ((u_char*) (lh+1), len);
1438 if (IF_QFULL (&sp->pp_cpq)) {
1439 IF_DROP (&sp->pp_fastq);
1440 IF_DROP (&ifp->if_snd);
1444 IF_ENQUEUE (&sp->pp_cpq, m);
1445 if (! (ifp->if_flags & IFF_OACTIVE))
1446 (*ifp->if_start) (ifp);
1447 ifp->if_obytes += m->m_pkthdr.len + 3;
1451 * Handle incoming PPP control protocol packets.
1454 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
1457 struct lcp_header *h;
1458 int printlen, len = m->m_pkthdr.len;
1465 SPP_FMT "%s invalid packet length: %d bytes\n",
1466 SPP_ARGS(ifp), cp->name, len);
1469 h = mtod (m, struct lcp_header*);
1471 printlen = ntohs(h->len);
1473 SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
1474 SPP_ARGS(ifp), cp->name,
1475 sppp_state_name(sp->state[cp->protoidx]),
1476 sppp_cp_type_name (h->type), h->ident, printlen);
1480 sppp_print_bytes ((u_char*) (h+1), printlen - 4);
1483 if (len > ntohs (h->len))
1484 len = ntohs (h->len);
1485 p = (u_char *)(h + 1);
1490 log(-1, SPP_FMT "%s invalid conf-req length %d\n",
1491 SPP_ARGS(ifp), cp->name,
1496 /* handle states where RCR doesn't get a SCA/SCN */
1497 switch (sp->state[cp->protoidx]) {
1499 case STATE_STOPPING:
1502 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
1506 rv = (cp->RCR)(sp, h, len);
1508 /* fatal error, shut down */
1513 switch (sp->state[cp->protoidx]) {
1517 /* fall through... */
1518 case STATE_ACK_SENT:
1519 case STATE_REQ_SENT:
1521 * sppp_cp_change_state() have the side effect of
1522 * restarting the timeouts. We want to avoid that
1523 * if the state don't change, otherwise we won't
1524 * ever timeout and resend a configuration request
1527 if (sp->state[cp->protoidx] == (rv ? STATE_ACK_SENT:
1530 sppp_cp_change_state(cp, sp, rv?
1531 STATE_ACK_SENT: STATE_REQ_SENT);
1534 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1536 sppp_cp_change_state(cp, sp, rv?
1537 STATE_ACK_SENT: STATE_REQ_SENT);
1539 case STATE_ACK_RCVD:
1541 sppp_cp_change_state(cp, sp, STATE_OPENED);
1543 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1548 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1551 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1552 SPP_ARGS(ifp), cp->name,
1553 sppp_cp_type_name(h->type),
1554 sppp_state_name(sp->state[cp->protoidx]));
1559 if (h->ident != sp->confid[cp->protoidx]) {
1561 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1562 SPP_ARGS(ifp), cp->name,
1563 h->ident, sp->confid[cp->protoidx]);
1567 switch (sp->state[cp->protoidx]) {
1570 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1573 case STATE_STOPPING:
1575 case STATE_REQ_SENT:
1576 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1577 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1582 case STATE_ACK_RCVD:
1584 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1586 case STATE_ACK_SENT:
1587 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1588 sppp_cp_change_state(cp, sp, STATE_OPENED);
1590 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1591 SPP_ARGS(ifp), cp->name);
1595 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1596 SPP_ARGS(ifp), cp->name,
1597 sppp_cp_type_name(h->type),
1598 sppp_state_name(sp->state[cp->protoidx]));
1604 if (h->ident != sp->confid[cp->protoidx]) {
1606 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1607 SPP_ARGS(ifp), cp->name,
1608 h->ident, sp->confid[cp->protoidx]);
1612 if (h->type == CONF_NAK)
1613 (cp->RCN_nak)(sp, h, len);
1615 (cp->RCN_rej)(sp, h, len);
1617 switch (sp->state[cp->protoidx]) {
1620 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1622 case STATE_REQ_SENT:
1623 case STATE_ACK_SENT:
1624 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1626 * Slow things down a bit if we think we might be
1627 * in loopback. Depend on the timeout to send the
1628 * next configuration request.
1637 case STATE_ACK_RCVD:
1638 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1642 case STATE_STOPPING:
1645 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1646 SPP_ARGS(ifp), cp->name,
1647 sppp_cp_type_name(h->type),
1648 sppp_state_name(sp->state[cp->protoidx]));
1654 switch (sp->state[cp->protoidx]) {
1655 case STATE_ACK_RCVD:
1656 case STATE_ACK_SENT:
1657 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1662 case STATE_STOPPING:
1663 case STATE_REQ_SENT:
1665 /* Send Terminate-Ack packet. */
1667 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
1668 SPP_ARGS(ifp), cp->name);
1669 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1673 sp->rst_counter[cp->protoidx] = 0;
1674 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1678 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1679 SPP_ARGS(ifp), cp->name,
1680 sppp_cp_type_name(h->type),
1681 sppp_state_name(sp->state[cp->protoidx]));
1686 switch (sp->state[cp->protoidx]) {
1689 case STATE_REQ_SENT:
1690 case STATE_ACK_SENT:
1693 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1696 case STATE_STOPPING:
1697 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1700 case STATE_ACK_RCVD:
1701 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1706 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1709 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1710 SPP_ARGS(ifp), cp->name,
1711 sppp_cp_type_name(h->type),
1712 sppp_state_name(sp->state[cp->protoidx]));
1717 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1719 SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
1720 "danger will robinson\n",
1721 SPP_ARGS(ifp), cp->name,
1722 sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
1723 switch (sp->state[cp->protoidx]) {
1726 case STATE_REQ_SENT:
1727 case STATE_ACK_SENT:
1729 case STATE_STOPPING:
1732 case STATE_ACK_RCVD:
1733 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1736 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1737 SPP_ARGS(ifp), cp->name,
1738 sppp_cp_type_name(h->type),
1739 sppp_state_name(sp->state[cp->protoidx]));
1746 const struct cp *upper;
1752 proto = ntohs(*((u_int16_t *)p));
1753 for (i = 0; i < IDX_COUNT; i++) {
1754 if (cps[i]->proto == proto) {
1762 if (catastrophic || debug)
1763 log(catastrophic? LOG_INFO: LOG_DEBUG,
1764 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n",
1765 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+',
1766 sppp_cp_type_name(h->type), proto,
1767 upper ? upper->name : "unknown",
1768 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?");
1771 * if we got RXJ+ against conf-req, the peer does not implement
1772 * this particular protocol type. terminate the protocol.
1774 if (upper && !catastrophic) {
1775 if (sp->state[upper->protoidx] == STATE_REQ_SENT) {
1781 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1782 switch (sp->state[cp->protoidx]) {
1785 case STATE_REQ_SENT:
1786 case STATE_ACK_SENT:
1788 case STATE_STOPPING:
1791 case STATE_ACK_RCVD:
1792 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1795 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1796 SPP_ARGS(ifp), cp->name,
1797 sppp_cp_type_name(h->type),
1798 sppp_state_name(sp->state[cp->protoidx]));
1804 if (cp->proto != PPP_LCP)
1806 /* Discard the packet. */
1809 if (cp->proto != PPP_LCP)
1811 if (sp->state[cp->protoidx] != STATE_OPENED) {
1813 log(-1, SPP_FMT "lcp echo req but lcp closed\n",
1820 log(-1, SPP_FMT "invalid lcp echo request "
1821 "packet length: %d bytes\n",
1822 SPP_ARGS(ifp), len);
1825 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
1826 ntohl (*(long*)(h+1)) == sp->lcp.magic) {
1827 /* Line loopback mode detected. */
1828 kprintf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
1829 sp->pp_loopcnt = MAXALIVECNT * 5;
1831 IF_DRAIN(&sp->pp_cpq);
1833 /* Shut down the PPP link. */
1839 *(long*)(h+1) = htonl (sp->lcp.magic);
1841 log(-1, SPP_FMT "got lcp echo req, sending echo rep\n",
1843 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
1846 if (cp->proto != PPP_LCP)
1848 if (h->ident != sp->lcp.echoid) {
1854 log(-1, SPP_FMT "lcp invalid echo reply "
1855 "packet length: %d bytes\n",
1856 SPP_ARGS(ifp), len);
1860 log(-1, SPP_FMT "lcp got echo rep\n",
1862 if (!(sp->lcp.opts & (1 << LCP_OPT_MAGIC)) ||
1863 ntohl (*(long*)(h+1)) != sp->lcp.magic)
1864 sp->pp_alivecnt = 0;
1867 /* Unknown packet type -- send Code-Reject packet. */
1870 log(-1, SPP_FMT "%s send code-rej for 0x%x\n",
1871 SPP_ARGS(ifp), cp->name, h->type);
1872 sppp_cp_send(sp, cp->proto, CODE_REJ,
1873 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h);
1880 * The generic part of all Up/Down/Open/Close/TO event handlers.
1881 * Basically, the state transition handling in the automaton.
1884 sppp_up_event(const struct cp *cp, struct sppp *sp)
1889 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
1890 SPP_ARGS(ifp), cp->name,
1891 sppp_state_name(sp->state[cp->protoidx]));
1893 switch (sp->state[cp->protoidx]) {
1895 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1897 case STATE_STARTING:
1898 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1900 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1903 kprintf(SPP_FMT "%s illegal up in state %s\n",
1904 SPP_ARGS(ifp), cp->name,
1905 sppp_state_name(sp->state[cp->protoidx]));
1910 sppp_down_event(const struct cp *cp, struct sppp *sp)
1915 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
1916 SPP_ARGS(ifp), cp->name,
1917 sppp_state_name(sp->state[cp->protoidx]));
1919 switch (sp->state[cp->protoidx]) {
1922 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1925 sppp_cp_change_state(cp, sp, STATE_STARTING);
1928 case STATE_STOPPING:
1929 case STATE_REQ_SENT:
1930 case STATE_ACK_RCVD:
1931 case STATE_ACK_SENT:
1932 sppp_cp_change_state(cp, sp, STATE_STARTING);
1936 sppp_cp_change_state(cp, sp, STATE_STARTING);
1939 kprintf(SPP_FMT "%s illegal down in state %s\n",
1940 SPP_ARGS(ifp), cp->name,
1941 sppp_state_name(sp->state[cp->protoidx]));
1947 sppp_open_event(const struct cp *cp, struct sppp *sp)
1952 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
1953 SPP_ARGS(ifp), cp->name,
1954 sppp_state_name(sp->state[cp->protoidx]));
1956 switch (sp->state[cp->protoidx]) {
1958 sppp_cp_change_state(cp, sp, STATE_STARTING);
1961 case STATE_STARTING:
1964 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1966 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1970 * Try escaping stopped state. This seems to bite
1971 * people occasionally, in particular for IPCP,
1972 * presumably following previous IPCP negotiation
1973 * aborts. Somehow, we must have missed a Down event
1974 * which would have caused a transition into starting
1975 * state, so as a bandaid we force the Down event now.
1976 * This effectively implements (something like the)
1977 * `restart' option mentioned in the state transition
1978 * table of RFC 1661.
1980 sppp_cp_change_state(cp, sp, STATE_STARTING);
1983 case STATE_STOPPING:
1984 case STATE_REQ_SENT:
1985 case STATE_ACK_RCVD:
1986 case STATE_ACK_SENT:
1990 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1997 sppp_close_event(const struct cp *cp, struct sppp *sp)
2002 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
2003 SPP_ARGS(ifp), cp->name,
2004 sppp_state_name(sp->state[cp->protoidx]));
2006 switch (sp->state[cp->protoidx]) {
2011 case STATE_STARTING:
2012 sppp_cp_change_state(cp, sp, STATE_INITIAL);
2016 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2018 case STATE_STOPPING:
2019 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2024 case STATE_REQ_SENT:
2025 case STATE_ACK_RCVD:
2026 case STATE_ACK_SENT:
2027 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
2028 sppp_cp_send(sp, cp->proto, TERM_REQ,
2029 ++sp->pp_seq[cp->protoidx], 0, 0);
2030 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2036 sppp_to_event(const struct cp *cp, struct sppp *sp)
2043 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
2044 SPP_ARGS(ifp), cp->name,
2045 sppp_state_name(sp->state[cp->protoidx]),
2046 sp->rst_counter[cp->protoidx]);
2048 if (--sp->rst_counter[cp->protoidx] < 0)
2050 switch (sp->state[cp->protoidx]) {
2052 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2055 case STATE_STOPPING:
2056 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2059 case STATE_REQ_SENT:
2060 case STATE_ACK_RCVD:
2061 case STATE_ACK_SENT:
2062 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2068 switch (sp->state[cp->protoidx]) {
2070 case STATE_STOPPING:
2071 sppp_cp_send(sp, cp->proto, TERM_REQ,
2072 ++sp->pp_seq[cp->protoidx], 0, 0);
2073 callout_reset(&sp->timeout[cp->protoidx],
2074 sp->lcp.timeout, cp->TO, sp);
2076 case STATE_REQ_SENT:
2077 case STATE_ACK_RCVD:
2079 /* sppp_cp_change_state() will restart the timer */
2080 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
2082 case STATE_ACK_SENT:
2084 callout_reset(&sp->timeout[cp->protoidx],
2085 sp->lcp.timeout, cp->TO, sp);
2093 * Change the state of a control protocol in the state automaton.
2094 * Takes care of starting/stopping the restart timer.
2097 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
2099 sp->state[cp->protoidx] = newstate;
2100 callout_stop(&sp->timeout[cp->protoidx]);
2104 case STATE_STARTING:
2110 case STATE_STOPPING:
2111 case STATE_REQ_SENT:
2112 case STATE_ACK_RCVD:
2113 case STATE_ACK_SENT:
2114 callout_reset(&sp->timeout[cp->protoidx],
2115 sp->lcp.timeout, cp->TO, sp);
2121 *--------------------------------------------------------------------------*
2123 * The LCP implementation. *
2125 *--------------------------------------------------------------------------*
2128 sppp_lcp_init(struct sppp *sp)
2130 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2132 sp->state[IDX_LCP] = STATE_INITIAL;
2133 sp->fail_counter[IDX_LCP] = 0;
2134 sp->pp_seq[IDX_LCP] = 0;
2135 sp->pp_rseq[IDX_LCP] = 0;
2137 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2139 /* Note that these values are relevant for all control protocols */
2140 sp->lcp.timeout = 3 * hz;
2141 sp->lcp.max_terminate = 2;
2142 sp->lcp.max_configure = 10;
2143 sp->lcp.max_failure = 10;
2144 #if defined(__DragonFly__)
2145 callout_init(&sp->timeout[IDX_LCP]);
2150 sppp_lcp_up(struct sppp *sp)
2154 sp->pp_alivecnt = 0;
2155 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2158 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2160 * If this interface is passive or dial-on-demand, and we are
2161 * still in Initial state, it means we've got an incoming
2162 * call. Activate the interface.
2164 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
2167 SPP_FMT "Up event", SPP_ARGS(ifp));
2168 ifp->if_flags |= IFF_RUNNING;
2169 if (sp->state[IDX_LCP] == STATE_INITIAL) {
2171 log(-1, "(incoming call)\n");
2172 sp->pp_flags |= PP_CALLIN;
2176 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 &&
2177 (sp->state[IDX_LCP] == STATE_INITIAL)) {
2178 ifp->if_flags |= IFF_RUNNING;
2182 sppp_up_event(&lcp, sp);
2186 sppp_lcp_down(struct sppp *sp)
2190 sppp_down_event(&lcp, sp);
2193 * If this is neither a dial-on-demand nor a passive
2194 * interface, simulate an ``ifconfig down'' action, so the
2195 * administrator can force a redial by another ``ifconfig
2196 * up''. XXX For leased line operation, should we immediately
2197 * try to reopen the connection here?
2199 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
2201 SPP_FMT "Down event, taking interface down.\n",
2207 SPP_FMT "Down event (carrier loss)\n",
2209 sp->pp_flags &= ~PP_CALLIN;
2210 if (sp->state[IDX_LCP] != STATE_INITIAL)
2212 ifp->if_flags &= ~IFF_RUNNING;
2217 sppp_lcp_open(struct sppp *sp)
2220 * If we are authenticator, negotiate LCP_AUTH
2222 if (sp->hisauth.proto != 0)
2223 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
2225 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2226 sp->pp_flags &= ~PP_NEEDAUTH;
2227 sppp_open_event(&lcp, sp);
2231 sppp_lcp_close(struct sppp *sp)
2233 sppp_close_event(&lcp, sp);
2237 sppp_lcp_TO(void *cookie)
2239 sppp_to_event(&lcp, (struct sppp *)cookie);
2243 * Analyze a configure request. Return true if it was agreeable, and
2244 * caused action sca, false if it has been rejected or nak'ed, and
2245 * caused action scn. (The return value is used to make the state
2246 * transition decision in the state automaton.)
2249 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2252 u_char *buf, *r, *p;
2259 buf = r = kmalloc (len, M_TEMP, M_INTWAIT);
2262 log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
2265 /* pass 1: check for things that need to be rejected */
2267 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2268 /* Sanity check option length */
2270 /* Malicious option - drop immediately.
2271 * XXX Maybe we should just RXJ it?
2273 log(-1, "%s: received malicious LCP option 0x%02x, "
2274 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname,
2279 log(-1, " %s ", sppp_lcp_opt_name(*p));
2283 if (len >= 6 && p[1] == 6)
2286 log(-1, "[invalid] ");
2288 case LCP_OPT_ASYNC_MAP:
2289 /* Async control character map. */
2290 if (len >= 6 && p[1] == 6)
2293 log(-1, "[invalid] ");
2296 /* Maximum receive unit. */
2297 if (len >= 4 && p[1] == 4)
2300 log(-1, "[invalid] ");
2302 case LCP_OPT_AUTH_PROTO:
2305 log(-1, "[invalid] ");
2308 authproto = (p[2] << 8) + p[3];
2309 if (authproto == PPP_CHAP && p[1] != 5) {
2311 log(-1, "[invalid chap len] ");
2314 if (sp->myauth.proto == 0) {
2315 /* we are not configured to do auth */
2317 log(-1, "[not configured] ");
2321 * Remote want us to authenticate, remember this,
2322 * so we stay in PHASE_AUTHENTICATE after LCP got
2325 sp->pp_flags |= PP_NEEDAUTH;
2328 /* Others not supported. */
2333 /* Add the option to rejected list. */
2340 log(-1, " send conf-rej\n");
2341 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2347 * pass 2: check for option values that are unacceptable and
2348 * thus require to be nak'ed.
2351 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
2356 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2358 log(-1, " %s ", sppp_lcp_opt_name(*p));
2361 /* Magic number -- extract. */
2362 nmagic = (u_long)p[2] << 24 |
2363 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2364 if (nmagic != sp->lcp.magic) {
2367 log(-1, "0x%lx ", nmagic);
2370 if (debug && sp->pp_loopcnt < MAXALIVECNT*5)
2371 log(-1, "[glitch] ");
2374 * We negate our magic here, and NAK it. If
2375 * we see it later in an NAK packet, we
2376 * suggest a new one.
2378 nmagic = ~sp->lcp.magic;
2380 p[2] = nmagic >> 24;
2381 p[3] = nmagic >> 16;
2386 case LCP_OPT_ASYNC_MAP:
2388 * Async control character map -- just ignore it.
2390 * Quote from RFC 1662, chapter 6:
2391 * To enable this functionality, synchronous PPP
2392 * implementations MUST always respond to the
2393 * Async-Control-Character-Map Configuration
2394 * Option with the LCP Configure-Ack. However,
2395 * acceptance of the Configuration Option does
2396 * not imply that the synchronous implementation
2397 * will do any ACCM mapping. Instead, all such
2398 * octet mapping will be performed by the
2399 * asynchronous-to-synchronous converter.
2405 * Maximum receive unit. Always agreeable,
2406 * but ignored by now.
2408 sp->lcp.their_mru = p[2] * 256 + p[3];
2410 log(-1, "%lu ", sp->lcp.their_mru);
2413 case LCP_OPT_AUTH_PROTO:
2414 authproto = (p[2] << 8) + p[3];
2415 if (sp->myauth.proto != authproto) {
2416 /* not agreed, nak */
2418 log(-1, "[mine %s != his %s] ",
2419 sppp_proto_name(sp->hisauth.proto),
2420 sppp_proto_name(authproto));
2421 p[2] = sp->myauth.proto >> 8;
2422 p[3] = sp->myauth.proto;
2425 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
2427 log(-1, "[chap not MD5] ");
2433 /* Add the option to nak'ed list. */
2440 * Local and remote magics equal -- loopback?
2442 if (sp->pp_loopcnt >= MAXALIVECNT*5) {
2443 if (sp->pp_loopcnt == MAXALIVECNT*5)
2444 kprintf (SPP_FMT "loopback\n",
2446 if (ifp->if_flags & IFF_UP) {
2448 IF_DRAIN(&sp->pp_cpq);
2453 } else if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
2455 log(-1, " max_failure (%d) exceeded, "
2457 sp->lcp.max_failure);
2458 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2461 log(-1, " send conf-nak\n");
2462 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
2466 log(-1, " send conf-ack\n");
2467 sp->fail_counter[IDX_LCP] = 0;
2469 sppp_cp_send (sp, PPP_LCP, CONF_ACK,
2470 h->ident, origlen, h+1);
2473 kfree (buf, M_TEMP);
2482 * Analyze the LCP Configure-Reject option list, and adjust our
2486 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
2492 buf = kmalloc (len, M_TEMP, M_INTWAIT);
2495 log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
2499 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2500 /* Sanity check option length */
2503 * Malicious option - drop immediately.
2504 * XXX Maybe we should just RXJ it?
2506 log(-1, "%s: received malicious LCP option, "
2507 "dropping.\n", ifp->if_xname);
2511 log(-1, " %s ", sppp_lcp_opt_name(*p));
2514 /* Magic number -- can't use it, use 0 */
2515 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
2520 * Should not be rejected anyway, since we only
2521 * negotiate a MRU if explicitly requested by
2524 sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
2526 case LCP_OPT_AUTH_PROTO:
2528 * Peer doesn't want to authenticate himself,
2529 * deny unless this is a dialout call, and
2530 * AUTHFLAG_NOCALLOUT is set.
2532 if ((sp->pp_flags & PP_CALLIN) == 0 &&
2533 (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
2535 log(-1, "[don't insist on auth "
2537 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2541 log(-1, "[access denied]\n");
2549 kfree (buf, M_TEMP);
2554 * Analyze the LCP Configure-NAK option list, and adjust our
2558 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
2565 buf = kmalloc (len, M_TEMP, M_INTWAIT);
2568 log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
2572 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2573 /* Sanity check option length */
2576 * Malicious option - drop immediately.
2577 * XXX Maybe we should just RXJ it?
2579 log(-1, "%s: received malicious LCP option, "
2580 "dropping.\n", ifp->if_xname);
2584 log(-1, " %s ", sppp_lcp_opt_name(*p));
2587 /* Magic number -- renegotiate */
2588 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
2589 len >= 6 && p[1] == 6) {
2590 magic = (u_long)p[2] << 24 |
2591 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2593 * If the remote magic is our negated one,
2594 * this looks like a loopback problem.
2595 * Suggest a new magic to make sure.
2597 if (magic == ~sp->lcp.magic) {
2599 log(-1, "magic glitch ");
2600 #if defined(__DragonFly__)
2601 sp->lcp.magic = krandom();
2603 sp->lcp.magic = time.tv_sec + time.tv_usec;
2606 sp->lcp.magic = magic;
2608 log(-1, "%lu ", magic);
2614 * Peer wants to advise us to negotiate an MRU.
2615 * Agree on it if it's reasonable, or use
2616 * default otherwise.
2618 if (len >= 4 && p[1] == 4) {
2619 u_int mru = p[2] * 256 + p[3];
2621 log(-1, "%d ", mru);
2622 if (mru < PP_MTU || mru > PP_MAX_MRU)
2625 sp->lcp.opts |= (1 << LCP_OPT_MRU);
2628 case LCP_OPT_AUTH_PROTO:
2630 * Peer doesn't like our authentication method,
2634 log(-1, "[access denied]\n");
2642 kfree (buf, M_TEMP);
2647 sppp_lcp_tlu(struct sppp *sp)
2654 if (! (ifp->if_flags & IFF_UP) &&
2655 (ifp->if_flags & IFF_RUNNING)) {
2656 /* Coming out of loopback mode. */
2658 kprintf (SPP_FMT "up\n", SPP_ARGS(ifp));
2661 for (i = 0; i < IDX_COUNT; i++)
2662 if ((cps[i])->flags & CP_QUAL)
2665 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
2666 (sp->pp_flags & PP_NEEDAUTH) != 0)
2667 sp->pp_phase = PHASE_AUTHENTICATE;
2669 sp->pp_phase = PHASE_NETWORK;
2672 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2673 sppp_phase_name(sp->pp_phase));
2676 * Open all authentication protocols. This is even required
2677 * if we already proceeded to network phase, since it might be
2678 * that remote wants us to authenticate, so we might have to
2679 * send a PAP request. Undesired authentication protocols
2680 * don't do anything when they get an Open event.
2682 for (i = 0; i < IDX_COUNT; i++)
2683 if ((cps[i])->flags & CP_AUTH)
2686 if (sp->pp_phase == PHASE_NETWORK) {
2687 /* Notify all NCPs. */
2688 for (i = 0; i < IDX_COUNT; i++)
2689 if (((cps[i])->flags & CP_NCP) &&
2692 * Hack to administratively disable IPv6 if
2693 * not desired. Perhaps we should have another
2694 * flag for this, but right now, we can make
2695 * all struct cp's read/only.
2697 (cps[i] != &ipv6cp ||
2698 (sp->confflags & CONF_ENABLE_IPV6)))
2702 /* Send Up events to all started protos. */
2703 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2704 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0)
2707 /* notify low-level driver of state change */
2709 sp->pp_chg(sp, (int)sp->pp_phase);
2711 if (sp->pp_phase == PHASE_NETWORK)
2712 /* if no NCP is starting, close down */
2713 sppp_lcp_check_and_close(sp);
2717 sppp_lcp_tld(struct sppp *sp)
2723 sp->pp_phase = PHASE_TERMINATE;
2726 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2727 sppp_phase_name(sp->pp_phase));
2730 * Take upper layers down. We send the Down event first and
2731 * the Close second to prevent the upper layers from sending
2732 * ``a flurry of terminate-request packets'', as the RFC
2735 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2736 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) {
2738 (cps[i])->Close(sp);
2743 sppp_lcp_tls(struct sppp *sp)
2747 sp->pp_phase = PHASE_ESTABLISH;
2750 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2751 sppp_phase_name(sp->pp_phase));
2753 /* Notify lower layer if desired. */
2761 sppp_lcp_tlf(struct sppp *sp)
2765 sp->pp_phase = PHASE_DEAD;
2767 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2768 sppp_phase_name(sp->pp_phase));
2770 /* Notify lower layer if desired. */
2778 sppp_lcp_scr(struct sppp *sp)
2780 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
2784 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
2785 if (! sp->lcp.magic)
2786 #if defined(__DragonFly__)
2787 sp->lcp.magic = krandom();
2789 sp->lcp.magic = time.tv_sec + time.tv_usec;
2791 opt[i++] = LCP_OPT_MAGIC;
2793 opt[i++] = sp->lcp.magic >> 24;
2794 opt[i++] = sp->lcp.magic >> 16;
2795 opt[i++] = sp->lcp.magic >> 8;
2796 opt[i++] = sp->lcp.magic;
2799 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
2800 opt[i++] = LCP_OPT_MRU;
2802 opt[i++] = sp->lcp.mru >> 8;
2803 opt[i++] = sp->lcp.mru;
2806 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
2807 authproto = sp->hisauth.proto;
2808 opt[i++] = LCP_OPT_AUTH_PROTO;
2809 opt[i++] = authproto == PPP_CHAP? 5: 4;
2810 opt[i++] = authproto >> 8;
2811 opt[i++] = authproto;
2812 if (authproto == PPP_CHAP)
2813 opt[i++] = CHAP_MD5;
2816 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP];
2817 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
2821 * Check the open NCPs, return true if at least one NCP is open.
2824 sppp_ncp_check(struct sppp *sp)
2828 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2829 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP)
2835 * Re-check the open NCPs and see if we should terminate the link.
2836 * Called by the NCPs during their tlf action handling.
2839 sppp_lcp_check_and_close(struct sppp *sp)
2842 if (sp->pp_phase < PHASE_NETWORK)
2843 /* don't bother, we are already going down */
2846 if (sppp_ncp_check(sp))
2853 *--------------------------------------------------------------------------*
2855 * The IPCP implementation. *
2857 *--------------------------------------------------------------------------*
2861 sppp_ipcp_init(struct sppp *sp)
2865 sp->state[IDX_IPCP] = STATE_INITIAL;
2866 sp->fail_counter[IDX_IPCP] = 0;
2867 sp->pp_seq[IDX_IPCP] = 0;
2868 sp->pp_rseq[IDX_IPCP] = 0;
2869 #if defined(__DragonFly__)
2870 callout_init(&sp->timeout[IDX_IPCP]);
2875 sppp_ipcp_up(struct sppp *sp)
2877 sppp_up_event(&ipcp, sp);
2881 sppp_ipcp_down(struct sppp *sp)
2883 sppp_down_event(&ipcp, sp);
2887 sppp_ipcp_open(struct sppp *sp)
2890 u_long myaddr, hisaddr;
2892 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN | IPCP_MYADDR_SEEN |
2893 IPCP_MYADDR_DYN | IPCP_VJ);
2896 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
2898 * If we don't have his address, this probably means our
2899 * interface doesn't want to talk IP at all. (This could
2900 * be the case if somebody wants to speak only IPX, for
2901 * example.) Don't open IPCP in this case.
2903 if (hisaddr == 0L) {
2904 /* XXX this message should go away */
2906 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
2912 * I don't have an assigned address, so i need to
2913 * negotiate my address.
2915 sp->ipcp.flags |= IPCP_MYADDR_DYN;
2916 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
2918 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
2919 if (sp->confflags & CONF_ENABLE_VJ) {
2920 sp->ipcp.opts |= (1 << IPCP_OPT_COMPRESSION);
2921 sp->ipcp.max_state = MAX_STATES - 1;
2922 sp->ipcp.compress_cid = 1;
2924 sppp_open_event(&ipcp, sp);
2928 sppp_ipcp_close(struct sppp *sp)
2930 sppp_close_event(&ipcp, sp);
2931 if (sp->ipcp.flags & IPCP_MYADDR_DYN)
2933 * My address was dynamic, clear it again.
2935 sppp_set_ip_addr(sp, 0L);
2939 sppp_ipcp_TO(void *cookie)
2941 sppp_to_event(&ipcp, (struct sppp *)cookie);
2945 * Analyze a configure request. Return true if it was agreeable, and
2946 * caused action sca, false if it has been rejected or nak'ed, and
2947 * caused action scn. (The return value is used to make the state
2948 * transition decision in the state automaton.)
2951 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2953 u_char *buf, *r, *p;
2954 struct ifnet *ifp = &sp->pp_if;
2955 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
2956 u_long hisaddr, desiredaddr;
2963 * Make sure to allocate a buf that can at least hold a
2964 * conf-nak with an `address' option. We might need it below.
2966 buf = r = kmalloc ((len < 6? 6: len), M_TEMP, M_INTWAIT);
2968 /* pass 1: see if we can recognize them */
2970 log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
2973 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2974 /* Sanity check option length */
2976 /* XXX should we just RXJ? */
2977 log(-1, "%s: malicious IPCP option received, dropping\n",
2982 log(-1, " %s ", sppp_ipcp_opt_name(*p));
2984 case IPCP_OPT_COMPRESSION:
2985 if (!(sp->confflags & CONF_ENABLE_VJ)) {
2986 /* VJ compression administratively disabled */
2988 log(-1, "[locally disabled] ");
2992 * In theory, we should only conf-rej an
2993 * option that is shorter than RFC 1618
2994 * requires (i.e. < 4), and should conf-nak
2995 * anything else that is not VJ. However,
2996 * since our algorithm always uses the
2997 * original option to NAK it with new values,
2998 * things would become more complicated. In
2999 * pratice, the only commonly implemented IP
3000 * compression option is VJ anyway, so the
3001 * difference is negligible.
3003 if (len >= 6 && p[1] == 6) {
3005 * correctly formed compression option
3006 * that could be VJ compression
3011 log(-1, "optlen %d [invalid/unsupported] ",
3014 case IPCP_OPT_ADDRESS:
3015 if (len >= 6 && p[1] == 6) {
3016 /* correctly formed address option */
3020 log(-1, "[invalid] ");
3023 /* Others not supported. */
3028 /* Add the option to rejected list. */
3035 log(-1, " send conf-rej\n");
3036 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
3041 /* pass 2: parse option values */
3042 sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
3044 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
3048 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3050 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3052 case IPCP_OPT_COMPRESSION:
3053 desiredcomp = p[2] << 8 | p[3];
3054 /* We only support VJ */
3055 if (desiredcomp == IPCP_COMP_VJ) {
3057 log(-1, "VJ [ack] ");
3058 sp->ipcp.flags |= IPCP_VJ;
3059 sl_compress_init(sp->pp_comp, p[4]);
3060 sp->ipcp.max_state = p[4];
3061 sp->ipcp.compress_cid = p[5];
3065 log(-1, "compproto %#04x [not supported] ",
3067 p[2] = IPCP_COMP_VJ >> 8;
3068 p[3] = IPCP_COMP_VJ;
3069 p[4] = sp->ipcp.max_state;
3070 p[5] = sp->ipcp.compress_cid;
3072 case IPCP_OPT_ADDRESS:
3073 /* This is the address he wants in his end */
3074 desiredaddr = p[2] << 24 | p[3] << 16 |
3076 if (desiredaddr == hisaddr ||
3077 (hisaddr >= 1 && hisaddr <= 254 && desiredaddr != 0)) {
3079 * Peer's address is same as our value,
3080 * or we have set it to 0.0.0.* to
3081 * indicate that we do not really care,
3082 * this is agreeable. Gonna conf-ack
3086 log(-1, "%s [ack] ",
3087 sppp_dotted_quad(hisaddr));
3088 /* record that we've seen it already */
3089 sp->ipcp.flags |= IPCP_HISADDR_SEEN;
3093 * The address wasn't agreeable. This is either
3094 * he sent us 0.0.0.0, asking to assign him an
3095 * address, or he send us another address not
3096 * matching our value. Either case, we gonna
3097 * conf-nak it with our value.
3098 * XXX: we should "rej" if hisaddr == 0
3101 if (desiredaddr == 0)
3102 log(-1, "[addr requested] ");
3104 log(-1, "%s [not agreed] ",
3105 sppp_dotted_quad(desiredaddr));
3108 p[2] = hisaddr >> 24;
3109 p[3] = hisaddr >> 16;
3110 p[4] = hisaddr >> 8;
3114 /* Add the option to nak'ed list. */
3121 * If we are about to conf-ack the request, but haven't seen
3122 * his address so far, gonna conf-nak it instead, with the
3123 * `address' option present and our idea of his address being
3124 * filled in there, to request negotiation of both addresses.
3126 * XXX This can result in an endless req - nak loop if peer
3127 * doesn't want to send us his address. Q: What should we do
3128 * about it? XXX A: implement the max-failure counter.
3130 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
3131 buf[0] = IPCP_OPT_ADDRESS;
3133 buf[2] = hisaddr >> 24;
3134 buf[3] = hisaddr >> 16;
3135 buf[4] = hisaddr >> 8;
3139 log(-1, "still need hisaddr ");
3144 log(-1, " send conf-nak\n");
3145 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
3148 log(-1, " send conf-ack\n");
3149 sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
3150 h->ident, origlen, h+1);
3153 kfree (buf, M_TEMP);
3162 * Analyze the IPCP Configure-Reject option list, and adjust our
3166 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3169 struct ifnet *ifp = &sp->pp_if;
3170 int debug = ifp->if_flags & IFF_DEBUG;
3173 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3176 log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
3180 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3181 /* Sanity check option length */
3183 /* XXX should we just RXJ? */
3184 log(-1, "%s: malicious IPCP option received, dropping\n",
3189 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3191 case IPCP_OPT_COMPRESSION:
3192 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESSION);
3194 case IPCP_OPT_ADDRESS:
3196 * Peer doesn't grok address option. This is
3197 * bad. XXX Should we better give up here?
3198 * XXX We could try old "addresses" option...
3200 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
3207 kfree (buf, M_TEMP);
3212 * Analyze the IPCP Configure-NAK option list, and adjust our
3216 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3219 struct ifnet *ifp = &sp->pp_if;
3220 int debug = ifp->if_flags & IFF_DEBUG;
3225 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3228 log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
3232 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3233 /* Sanity check option length */
3235 /* XXX should we just RXJ? */
3236 log(-1, "%s: malicious IPCP option received, dropping\n",
3241 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3243 case IPCP_OPT_COMPRESSION:
3244 if (len >= 6 && p[1] == 6) {
3245 desiredcomp = p[2] << 8 | p[3];
3247 log(-1, "[wantcomp %#04x] ",
3249 if (desiredcomp == IPCP_COMP_VJ) {
3250 sl_compress_init(sp->pp_comp, p[4]);
3251 sp->ipcp.max_state = p[4];
3252 sp->ipcp.compress_cid = p[5];
3254 log(-1, "[agree] ");
3257 ~(1 << IPCP_OPT_COMPRESSION);
3260 case IPCP_OPT_ADDRESS:
3262 * Peer doesn't like our local IP address. See
3263 * if we can do something for him. We'll drop
3264 * him our address then.
3266 if (len >= 6 && p[1] == 6) {
3267 wantaddr = p[2] << 24 | p[3] << 16 |
3269 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
3271 log(-1, "[wantaddr %s] ",
3272 sppp_dotted_quad(wantaddr));
3274 * When doing dynamic address assignment,
3275 * we accept his offer. Otherwise, we
3276 * ignore it and thus continue to negotiate
3277 * our already existing value.
3278 * XXX: Bogus, if he said no once, he'll
3279 * just say no again, might as well die.
3281 if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
3282 sppp_set_ip_addr(sp, wantaddr);
3284 log(-1, "[agree] ");
3285 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
3293 kfree (buf, M_TEMP);
3298 sppp_ipcp_tlu(struct sppp *sp)
3300 /* we are up - notify isdn daemon */
3306 sppp_ipcp_tld(struct sppp *sp)
3311 sppp_ipcp_tls(struct sppp *sp)
3313 /* indicate to LCP that it must stay alive */
3314 sp->lcp.protos |= (1 << IDX_IPCP);
3318 sppp_ipcp_tlf(struct sppp *sp)
3320 /* we no longer need LCP */
3321 sp->lcp.protos &= ~(1 << IDX_IPCP);
3322 sppp_lcp_check_and_close(sp);
3326 sppp_ipcp_scr(struct sppp *sp)
3328 char opt[6 /* compression */ + 6 /* address */];
3332 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
3333 opt[i++] = IPCP_OPT_COMPRESSION;
3335 opt[i++] = IPCP_COMP_VJ >> 8;
3336 opt[i++] = IPCP_COMP_VJ;
3337 opt[i++] = sp->ipcp.max_state;
3338 opt[i++] = sp->ipcp.compress_cid;
3340 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
3341 sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
3342 opt[i++] = IPCP_OPT_ADDRESS;
3344 opt[i++] = ouraddr >> 24;
3345 opt[i++] = ouraddr >> 16;
3346 opt[i++] = ouraddr >> 8;
3350 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP];
3351 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
3355 *--------------------------------------------------------------------------*
3357 * The IPv6CP implementation. *
3359 *--------------------------------------------------------------------------*
3364 sppp_ipv6cp_init(struct sppp *sp)
3366 sp->ipv6cp.opts = 0;
3367 sp->ipv6cp.flags = 0;
3368 sp->state[IDX_IPV6CP] = STATE_INITIAL;
3369 sp->fail_counter[IDX_IPV6CP] = 0;
3370 sp->pp_seq[IDX_IPV6CP] = 0;
3371 sp->pp_rseq[IDX_IPV6CP] = 0;
3372 #if defined(__NetBSD__)
3373 callout_init(&sp->ch[IDX_IPV6CP]);
3375 #if defined(__DragonFly__)
3376 callout_init(&sp->timeout[IDX_IPV6CP]);
3381 sppp_ipv6cp_up(struct sppp *sp)
3383 sppp_up_event(&ipv6cp, sp);
3387 sppp_ipv6cp_down(struct sppp *sp)
3389 sppp_down_event(&ipv6cp, sp);
3393 sppp_ipv6cp_open(struct sppp *sp)
3396 struct in6_addr myaddr, hisaddr;
3398 #ifdef IPV6CP_MYIFID_DYN
3399 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN);
3401 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN;
3404 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0);
3406 * If we don't have our address, this probably means our
3407 * interface doesn't want to talk IPv6 at all. (This could
3408 * be the case if somebody wants to speak only IPX, for
3409 * example.) Don't open IPv6CP in this case.
3411 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) {
3412 /* XXX this message should go away */
3414 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n",
3419 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3420 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3421 sppp_open_event(&ipv6cp, sp);
3425 sppp_ipv6cp_close(struct sppp *sp)
3427 sppp_close_event(&ipv6cp, sp);
3431 sppp_ipv6cp_TO(void *cookie)
3433 sppp_to_event(&ipv6cp, (struct sppp *)cookie);
3437 * Analyze a configure request. Return true if it was agreeable, and
3438 * caused action sca, false if it has been rejected or nak'ed, and
3439 * caused action scn. (The return value is used to make the state
3440 * transition decision in the state automaton.)
3443 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3445 u_char *buf, *r, *p;
3446 struct ifnet *ifp = &sp->pp_if;
3447 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
3448 struct in6_addr myaddr, desiredaddr, suggestaddr;
3451 int collision, nohisaddr;
3456 * Make sure to allocate a buf that can at least hold a
3457 * conf-nak with an `address' option. We might need it below.
3459 buf = r = kmalloc ((len < 6? 6: len), M_TEMP, M_INTWAIT);
3461 /* pass 1: see if we can recognize them */
3463 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:",
3467 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3468 /* Sanity check option length */
3471 log(-1, "%s: received malicious IPCPv6 option, "
3472 "dropping\n", ifp->if_xname);
3476 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3478 case IPV6CP_OPT_IFID:
3479 if (len >= 10 && p[1] == 10 && ifidcount == 0) {
3480 /* correctly formed address option */
3485 log(-1, " [invalid]");
3488 case IPV6CP_OPT_COMPRESSION:
3489 if (len >= 4 && p[1] >= 4) {
3490 /* correctly formed compress option */
3494 log(-1, " [invalid]");
3498 /* Others not supported. */
3503 /* Add the option to rejected list. */
3510 log(-1, " send conf-rej\n");
3511 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf);
3516 /* pass 2: parse option values */
3517 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
3519 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ",
3524 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3526 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3529 case IPV6CP_OPT_COMPRESSION:
3532 case IPV6CP_OPT_IFID:
3533 bzero(&desiredaddr, sizeof(desiredaddr));
3534 bcopy(&p[2], &desiredaddr.s6_addr[8], 8);
3535 collision = (bcmp(&desiredaddr.s6_addr[8],
3536 &myaddr.s6_addr[8], 8) == 0);
3537 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr);
3539 desiredaddr.s6_addr16[0] = htons(0xfe80);
3540 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index);
3542 if (!collision && !nohisaddr) {
3543 /* no collision, hisaddr known - Conf-Ack */
3548 ip6_sprintf(&desiredaddr),
3549 sppp_cp_type_name(type));
3554 bzero(&suggestaddr, sizeof(&suggestaddr));
3555 if (collision && nohisaddr) {
3556 /* collision, hisaddr unknown - Conf-Rej */
3561 * - no collision, hisaddr unknown, or
3562 * - collision, hisaddr known
3563 * Conf-Nak, suggest hisaddr
3566 sppp_suggest_ip6_addr(sp, &suggestaddr);
3567 bcopy(&suggestaddr.s6_addr[8], &p[2], 8);
3570 log(-1, " %s [%s]", ip6_sprintf(&desiredaddr),
3571 sppp_cp_type_name(type));
3574 /* Add the option to nak'ed list. */
3580 if (rlen == 0 && type == CONF_ACK) {
3582 log(-1, " send %s\n", sppp_cp_type_name(type));
3583 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1);
3586 if (type == CONF_ACK)
3587 panic("IPv6CP RCR: CONF_ACK with non-zero rlen");
3591 log(-1, " send %s suggest %s\n",
3592 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr));
3594 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf);
3598 kfree (buf, M_TEMP);
3607 * Analyze the IPv6CP Configure-Reject option list, and adjust our
3611 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3614 struct ifnet *ifp = &sp->pp_if;
3615 int debug = ifp->if_flags & IFF_DEBUG;
3618 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3621 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:",
3625 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3628 log(-1, "%s: received malicious IPCPv6 option, "
3629 "dropping\n", ifp->if_xname);
3633 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3635 case IPV6CP_OPT_IFID:
3637 * Peer doesn't grok address option. This is
3638 * bad. XXX Should we better give up here?
3640 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID);
3643 case IPV6CP_OPT_COMPRESS:
3644 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS);
3652 kfree (buf, M_TEMP);
3657 * Analyze the IPv6CP Configure-NAK option list, and adjust our
3661 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3664 struct ifnet *ifp = &sp->pp_if;
3665 int debug = ifp->if_flags & IFF_DEBUG;
3666 struct in6_addr suggestaddr;
3669 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3672 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:",
3676 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3679 log(-1, "%s: received malicious IPCPv6 option, "
3680 "dropping\n", ifp->if_xname);
3684 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3686 case IPV6CP_OPT_IFID:
3688 * Peer doesn't like our local ifid. See
3689 * if we can do something for him. We'll drop
3690 * him our address then.
3692 if (len < 10 || p[1] != 10)
3694 bzero(&suggestaddr, sizeof(suggestaddr));
3695 suggestaddr.s6_addr16[0] = htons(0xfe80);
3696 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index);
3697 bcopy(&p[2], &suggestaddr.s6_addr[8], 8);
3699 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3701 log(-1, " [suggestaddr %s]",
3702 ip6_sprintf(&suggestaddr));
3703 #ifdef IPV6CP_MYIFID_DYN
3705 * When doing dynamic address assignment,
3706 * we accept his offer.
3708 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) {
3709 struct in6_addr lastsuggest;
3711 * If <suggested myaddr from peer> equals to
3712 * <hisaddr we have suggested last time>,
3713 * we have a collision. generate new random
3716 sppp_suggest_ip6_addr(&lastsuggest);
3717 if (IN6_ARE_ADDR_EQUAL(&suggestaddr,
3720 log(-1, " [random]");
3721 sppp_gen_ip6_addr(sp, &suggestaddr);
3723 sppp_set_ip6_addr(sp, &suggestaddr, 0);
3725 log(-1, " [agree]");
3726 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3730 * Since we do not do dynamic address assignment,
3731 * we ignore it and thus continue to negotiate
3732 * our already existing value. This can possibly
3733 * go into infinite request-reject loop.
3735 * This is not likely because we normally use
3736 * ifid based on MAC-address.
3737 * If you have no ethernet card on the node, too bad.
3738 * XXX should we use fail_counter?
3743 case IPV6CP_OPT_COMPRESS:
3745 * Peer wants different compression parameters.
3754 kfree (buf, M_TEMP);
3758 sppp_ipv6cp_tlu(struct sppp *sp)
3760 /* we are up - notify isdn daemon */
3766 sppp_ipv6cp_tld(struct sppp *sp)
3771 sppp_ipv6cp_tls(struct sppp *sp)
3773 /* indicate to LCP that it must stay alive */
3774 sp->lcp.protos |= (1 << IDX_IPV6CP);
3778 sppp_ipv6cp_tlf(struct sppp *sp)
3781 #if 0 /* need #if 0 to close IPv6CP properly */
3782 /* we no longer need LCP */
3783 sp->lcp.protos &= ~(1 << IDX_IPV6CP);
3784 sppp_lcp_check_and_close(sp);
3789 sppp_ipv6cp_scr(struct sppp *sp)
3791 char opt[10 /* ifid */ + 4 /* compression, minimum */];
3792 struct in6_addr ouraddr;
3795 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) {
3796 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0);
3797 opt[i++] = IPV6CP_OPT_IFID;
3799 bcopy(&ouraddr.s6_addr[8], &opt[i], 8);
3804 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) {
3805 opt[i++] = IPV6CP_OPT_COMPRESSION;
3807 opt[i++] = 0; /* TBD */
3808 opt[i++] = 0; /* TBD */
3809 /* variable length data may follow */
3813 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP];
3814 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt);
3818 sppp_ipv6cp_init(struct sppp *sp)
3823 sppp_ipv6cp_up(struct sppp *sp)
3828 sppp_ipv6cp_down(struct sppp *sp)
3834 sppp_ipv6cp_open(struct sppp *sp)
3839 sppp_ipv6cp_close(struct sppp *sp)
3844 sppp_ipv6cp_TO(void *sp)
3849 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3855 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3860 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3865 sppp_ipv6cp_tlu(struct sppp *sp)
3870 sppp_ipv6cp_tld(struct sppp *sp)
3875 sppp_ipv6cp_tls(struct sppp *sp)
3880 sppp_ipv6cp_tlf(struct sppp *sp)
3885 sppp_ipv6cp_scr(struct sppp *sp)
3891 *--------------------------------------------------------------------------*
3893 * The CHAP implementation. *
3895 *--------------------------------------------------------------------------*
3899 * The authentication protocols don't employ a full-fledged state machine as
3900 * the control protocols do, since they do have Open and Close events, but
3901 * not Up and Down, nor are they explicitly terminated. Also, use of the
3902 * authentication protocols may be different in both directions (this makes
3903 * sense, think of a machine that never accepts incoming calls but only
3904 * calls out, it doesn't require the called party to authenticate itself).
3906 * Our state machine for the local authentication protocol (we are requesting
3907 * the peer to authenticate) looks like:
3910 * +--------------------------------------------+
3912 * +--------+ Close +---------+ RCA+
3913 * | |<----------------------------------| |------+
3914 * +--->| Closed | TO* | Opened | sca |
3915 * | | |-----+ +-------| |<-----+
3916 * | +--------+ irc | | +---------+
3922 * | | +------->+ | |
3924 * | +--------+ V | |
3925 * | | |<----+<--------------------+ |
3931 * +------+ +------------------------------------------+
3932 * scn,tld sca,irc,ict,tlu
3937 * Open: LCP reached authentication phase
3938 * Close: LCP reached terminate phase
3940 * RCA+: received reply (pap-req, chap-response), acceptable
3941 * RCN: received reply (pap-req, chap-response), not acceptable
3942 * TO+: timeout with restart counter >= 0
3943 * TO-: timeout with restart counter < 0
3944 * TO*: reschedule timeout for CHAP
3946 * scr: send request packet (none for PAP, chap-challenge)
3947 * sca: send ack packet (pap-ack, chap-success)
3948 * scn: send nak packet (pap-nak, chap-failure)
3949 * ict: initialize re-challenge timer (CHAP only)
3951 * tlu: this-layer-up, LCP reaches network phase
3952 * tld: this-layer-down, LCP enters terminate phase
3954 * Note that in CHAP mode, after sending a new challenge, while the state
3955 * automaton falls back into Req-Sent state, it doesn't signal a tld
3956 * event to LCP, so LCP remains in network phase. Only after not getting
3957 * any response (or after getting an unacceptable response), CHAP closes,
3958 * causing LCP to enter terminate phase.
3960 * With PAP, there is no initial request that can be sent. The peer is
3961 * expected to send one based on the successful negotiation of PAP as
3962 * the authentication protocol during the LCP option negotiation.
3964 * Incoming authentication protocol requests (remote requests
3965 * authentication, we are peer) don't employ a state machine at all,
3966 * they are simply answered. Some peers [Ascend P50 firmware rev
3967 * 4.50] react allergically when sending IPCP requests while they are
3968 * still in authentication phase (thereby violating the standard that
3969 * demands that these NCP packets are to be discarded), so we keep
3970 * track of the peer demanding us to authenticate, and only proceed to
3971 * phase network once we've seen a positive acknowledge for the
3976 * Handle incoming CHAP packets.
3979 sppp_chap_input(struct sppp *sp, struct mbuf *m)
3982 struct lcp_header *h;
3984 u_char *value, *name, digest[AUTHKEYLEN], dsize;
3985 int value_len, name_len;
3988 len = m->m_pkthdr.len;
3992 SPP_FMT "chap invalid packet length: %d bytes\n",
3993 SPP_ARGS(ifp), len);
3996 h = mtod (m, struct lcp_header*);
3997 if (len > ntohs (h->len))
3998 len = ntohs (h->len);
4001 /* challenge, failure and success are his authproto */
4002 case CHAP_CHALLENGE:
4003 value = 1 + (u_char*)(h+1);
4004 value_len = value[-1];
4005 name = value + value_len;
4006 name_len = len - value_len - 5;
4010 SPP_FMT "chap corrupted challenge "
4011 "<%s id=0x%x len=%d",
4013 sppp_auth_type_name(PPP_CHAP, h->type),
4014 h->ident, ntohs(h->len));
4015 sppp_print_bytes((u_char*) (h+1), len-4);
4023 SPP_FMT "chap input <%s id=0x%x len=%d name=",
4025 sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
4027 sppp_print_string((char*) name, name_len);
4028 log(-1, " value-size=%d value=", value_len);
4029 sppp_print_bytes(value, value_len);
4033 /* Compute reply value. */
4035 MD5Update(&ctx, &h->ident, 1);
4036 MD5Update(&ctx, sp->myauth.secret,
4037 sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
4038 MD5Update(&ctx, value, value_len);
4039 MD5Final(digest, &ctx);
4040 dsize = sizeof digest;
4042 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
4043 sizeof dsize, (const char *)&dsize,
4044 sizeof digest, digest,
4045 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4052 log(LOG_DEBUG, SPP_FMT "chap success",
4056 sppp_print_string((char*)(h + 1), len - 4);
4063 sp->pp_flags &= ~PP_NEEDAUTH;
4064 if (sp->myauth.proto == PPP_CHAP &&
4065 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4066 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
4068 * We are authenticator for CHAP but didn't
4069 * complete yet. Leave it to tlu to proceed
4076 sppp_phase_network(sp);
4081 log(LOG_INFO, SPP_FMT "chap failure",
4085 sppp_print_string((char*)(h + 1), len - 4);
4089 log(LOG_INFO, SPP_FMT "chap failure\n",
4091 /* await LCP shutdown by authenticator */
4094 /* response is my authproto */
4096 value = 1 + (u_char*)(h+1);
4097 value_len = value[-1];
4098 name = value + value_len;
4099 name_len = len - value_len - 5;
4103 SPP_FMT "chap corrupted response "
4104 "<%s id=0x%x len=%d",
4106 sppp_auth_type_name(PPP_CHAP, h->type),
4107 h->ident, ntohs(h->len));
4108 sppp_print_bytes((u_char*)(h+1), len-4);
4113 if (h->ident != sp->confid[IDX_CHAP]) {
4116 SPP_FMT "chap dropping response for old ID "
4117 "(got %d, expected %d)\n",
4119 h->ident, sp->confid[IDX_CHAP]);
4122 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
4123 || bcmp(name, sp->hisauth.name, name_len) != 0) {
4124 log(LOG_INFO, SPP_FMT "chap response, his name ",
4126 sppp_print_string(name, name_len);
4127 log(-1, " != expected ");
4128 sppp_print_string(sp->hisauth.name,
4129 sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
4133 log(LOG_DEBUG, SPP_FMT "chap input(%s) "
4134 "<%s id=0x%x len=%d name=",
4136 sppp_state_name(sp->state[IDX_CHAP]),
4137 sppp_auth_type_name(PPP_CHAP, h->type),
4138 h->ident, ntohs (h->len));
4139 sppp_print_string((char*)name, name_len);
4140 log(-1, " value-size=%d value=", value_len);
4141 sppp_print_bytes(value, value_len);
4144 if (value_len != AUTHKEYLEN) {
4147 SPP_FMT "chap bad hash value length: "
4148 "%d bytes, should be %d\n",
4149 SPP_ARGS(ifp), value_len,
4155 MD5Update(&ctx, &h->ident, 1);
4156 MD5Update(&ctx, sp->hisauth.secret,
4157 sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
4158 MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
4159 MD5Final(digest, &ctx);
4161 #define FAILMSG "Failed..."
4162 #define SUCCMSG "Welcome!"
4164 if (value_len != sizeof digest ||
4165 bcmp(digest, value, value_len) != 0) {
4166 /* action scn, tld */
4167 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
4168 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4173 /* action sca, perhaps tlu */
4174 if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
4175 sp->state[IDX_CHAP] == STATE_OPENED)
4176 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
4177 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4179 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
4180 sppp_cp_change_state(&chap, sp, STATE_OPENED);
4186 /* Unknown CHAP packet type -- ignore. */
4188 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
4189 "<0x%x id=0x%xh len=%d",
4191 sppp_state_name(sp->state[IDX_CHAP]),
4192 h->type, h->ident, ntohs(h->len));
4193 sppp_print_bytes((u_char*)(h+1), len-4);
4202 sppp_chap_init(struct sppp *sp)
4204 /* Chap doesn't have STATE_INITIAL at all. */
4205 sp->state[IDX_CHAP] = STATE_CLOSED;
4206 sp->fail_counter[IDX_CHAP] = 0;
4207 sp->pp_seq[IDX_CHAP] = 0;
4208 sp->pp_rseq[IDX_CHAP] = 0;
4209 #if defined(__DragonFly__)
4210 callout_init(&sp->timeout[IDX_CHAP]);
4215 sppp_chap_open(struct sppp *sp)
4217 if (sp->myauth.proto == PPP_CHAP &&
4218 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4219 /* we are authenticator for CHAP, start it */
4221 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4222 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4224 /* nothing to be done if we are peer, await a challenge */
4228 sppp_chap_close(struct sppp *sp)
4230 if (sp->state[IDX_CHAP] != STATE_CLOSED)
4231 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4235 sppp_chap_TO(void *cookie)
4237 struct sppp *sp = (struct sppp *)cookie;
4243 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
4245 sppp_state_name(sp->state[IDX_CHAP]),
4246 sp->rst_counter[IDX_CHAP]);
4248 if (--sp->rst_counter[IDX_CHAP] < 0)
4250 switch (sp->state[IDX_CHAP]) {
4251 case STATE_REQ_SENT:
4253 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4257 /* TO+ (or TO*) event */
4258 switch (sp->state[IDX_CHAP]) {
4261 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4263 case STATE_REQ_SENT:
4265 /* sppp_cp_change_state() will restart the timer */
4266 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4274 sppp_chap_tlu(struct sppp *sp)
4280 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4283 * Some broken CHAP implementations (Conware CoNet, firmware
4284 * 4.0.?) don't want to re-authenticate their CHAP once the
4285 * initial challenge-response exchange has taken place.
4286 * Provide for an option to avoid rechallenges.
4288 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
4290 * Compute the re-challenge timeout. This will yield
4291 * a number between 300 and 810 seconds.
4293 i = 300 + ((unsigned)(krandom() & 0xff00) >> 7);
4294 callout_reset(&sp->timeout[IDX_CHAP], i * hz, chap.TO, sp);
4299 SPP_FMT "chap %s, ",
4301 sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
4302 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
4303 log(-1, "next re-challenge in %d seconds\n", i);
4305 log(-1, "re-challenging suppressed\n");
4310 /* indicate to LCP that we need to be closed down */
4311 sp->lcp.protos |= (1 << IDX_CHAP);
4313 if (sp->pp_flags & PP_NEEDAUTH) {
4315 * Remote is authenticator, but his auth proto didn't
4316 * complete yet. Defer the transition to network
4326 * If we are already in phase network, we are done here. This
4327 * is the case if this is a dummy tlu event after a re-challenge.
4329 if (sp->pp_phase != PHASE_NETWORK)
4330 sppp_phase_network(sp);
4334 sppp_chap_tld(struct sppp *sp)
4339 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
4340 callout_stop(&sp->timeout[IDX_CHAP]);
4341 sp->lcp.protos &= ~(1 << IDX_CHAP);
4347 sppp_chap_scr(struct sppp *sp)
4352 /* Compute random challenge. */
4353 ch = (u_long *)sp->myauth.challenge;
4354 #if defined(__DragonFly__)
4355 read_random(&seed, sizeof seed);
4360 seed = tv.tv_sec ^ tv.tv_usec;
4363 ch[0] = seed ^ krandom();
4364 ch[1] = seed ^ krandom();
4365 ch[2] = seed ^ krandom();
4366 ch[3] = seed ^ krandom();
4369 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP];
4371 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
4372 sizeof clen, (const char *)&clen,
4373 (size_t)AUTHKEYLEN, sp->myauth.challenge,
4374 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4380 *--------------------------------------------------------------------------*
4382 * The PAP implementation. *
4384 *--------------------------------------------------------------------------*
4387 * For PAP, we need to keep a little state also if we are the peer, not the
4388 * authenticator. This is since we don't get a request to authenticate, but
4389 * have to repeatedly authenticate ourself until we got a response (or the
4390 * retry counter is expired).
4394 * Handle incoming PAP packets. */
4396 sppp_pap_input(struct sppp *sp, struct mbuf *m)
4399 struct lcp_header *h;
4401 u_char *name, *passwd, mlen;
4402 int name_len, passwd_len;
4405 * Malicious input might leave this uninitialized, so
4406 * init to an impossible value.
4410 len = m->m_pkthdr.len;
4414 SPP_FMT "pap invalid packet length: %d bytes\n",
4415 SPP_ARGS(ifp), len);
4418 h = mtod (m, struct lcp_header*);
4419 if (len > ntohs (h->len))
4420 len = ntohs (h->len);
4422 /* PAP request is my authproto */
4424 name = 1 + (u_char*)(h+1);
4425 name_len = name[-1];
4426 passwd = name + name_len + 1;
4427 if (name_len > len - 6 ||
4428 (passwd_len = passwd[-1]) > len - 6 - name_len) {
4430 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4431 "<%s id=0x%x len=%d",
4433 sppp_auth_type_name(PPP_PAP, h->type),
4434 h->ident, ntohs(h->len));
4435 sppp_print_bytes((u_char*)(h+1), len-4);
4441 log(LOG_DEBUG, SPP_FMT "pap input(%s) "
4442 "<%s id=0x%x len=%d name=",
4444 sppp_state_name(sp->state[IDX_PAP]),
4445 sppp_auth_type_name(PPP_PAP, h->type),
4446 h->ident, ntohs(h->len));
4447 sppp_print_string((char*)name, name_len);
4448 log(-1, " passwd=");
4449 sppp_print_string((char*)passwd, passwd_len);
4452 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) ||
4453 passwd_len != sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN) ||
4454 bcmp(name, sp->hisauth.name, name_len) != 0 ||
4455 bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
4456 /* action scn, tld */
4457 mlen = sizeof(FAILMSG) - 1;
4458 sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
4459 sizeof mlen, (const char *)&mlen,
4460 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4465 /* action sca, perhaps tlu */
4466 if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
4467 sp->state[IDX_PAP] == STATE_OPENED) {
4468 mlen = sizeof(SUCCMSG) - 1;
4469 sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
4470 sizeof mlen, (const char *)&mlen,
4471 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4474 if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
4475 sppp_cp_change_state(&pap, sp, STATE_OPENED);
4480 /* ack and nak are his authproto */
4482 callout_stop(&sp->pap_my_to);
4484 log(LOG_DEBUG, SPP_FMT "pap success",
4486 name = 1 + (u_char *)(h + 1);
4487 name_len = name[-1];
4488 if (len > 5 && name_len < len+4) {
4490 sppp_print_string(name, name_len);
4497 sp->pp_flags &= ~PP_NEEDAUTH;
4498 if (sp->myauth.proto == PPP_PAP &&
4499 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4500 (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
4502 * We are authenticator for PAP but didn't
4503 * complete yet. Leave it to tlu to proceed
4514 sppp_phase_network(sp);
4518 callout_stop(&sp->pap_my_to);
4520 log(LOG_INFO, SPP_FMT "pap failure",
4522 name = 1 + (u_char *)(h + 1);
4523 name_len = name[-1];
4524 if (len > 5 && name_len < len+4) {
4526 sppp_print_string(name, name_len);
4530 log(LOG_INFO, SPP_FMT "pap failure\n",
4532 /* await LCP shutdown by authenticator */
4536 /* Unknown PAP packet type -- ignore. */
4538 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4539 "<0x%x id=0x%x len=%d",
4541 h->type, h->ident, ntohs(h->len));
4542 sppp_print_bytes((u_char*)(h+1), len-4);
4551 sppp_pap_init(struct sppp *sp)
4553 /* PAP doesn't have STATE_INITIAL at all. */
4554 sp->state[IDX_PAP] = STATE_CLOSED;
4555 sp->fail_counter[IDX_PAP] = 0;
4556 sp->pp_seq[IDX_PAP] = 0;
4557 sp->pp_rseq[IDX_PAP] = 0;
4558 #if defined(__DragonFly__)
4559 callout_init(&sp->timeout[IDX_PAP]);
4560 callout_init(&sp->pap_my_to);
4565 sppp_pap_open(struct sppp *sp)
4567 if (sp->hisauth.proto == PPP_PAP &&
4568 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4569 /* we are authenticator for PAP, start our timer */
4570 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4571 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4573 if (sp->myauth.proto == PPP_PAP) {
4574 /* we are peer, send a request, and start a timer */
4576 callout_reset(&sp->pap_my_to, sp->lcp.timeout,
4577 sppp_pap_my_TO, sp);
4582 sppp_pap_close(struct sppp *sp)
4584 if (sp->state[IDX_PAP] != STATE_CLOSED)
4585 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4589 * That's the timeout routine if we are authenticator. Since the
4590 * authenticator is basically passive in PAP, we can't do much here.
4593 sppp_pap_TO(void *cookie)
4595 struct sppp *sp = (struct sppp *)cookie;
4601 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
4603 sppp_state_name(sp->state[IDX_PAP]),
4604 sp->rst_counter[IDX_PAP]);
4606 if (--sp->rst_counter[IDX_PAP] < 0)
4608 switch (sp->state[IDX_PAP]) {
4609 case STATE_REQ_SENT:
4611 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4615 /* TO+ event, not very much we could do */
4616 switch (sp->state[IDX_PAP]) {
4617 case STATE_REQ_SENT:
4618 /* sppp_cp_change_state() will restart the timer */
4619 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4627 * That's the timeout handler if we are peer. Since the peer is active,
4628 * we need to retransmit our PAP request since it is apparently lost.
4629 * XXX We should impose a max counter.
4632 sppp_pap_my_TO(void *cookie)
4634 struct sppp *sp = (struct sppp *)cookie;
4638 log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
4645 sppp_pap_tlu(struct sppp *sp)
4649 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4652 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
4653 SPP_ARGS(ifp), pap.name);
4657 /* indicate to LCP that we need to be closed down */
4658 sp->lcp.protos |= (1 << IDX_PAP);
4660 if (sp->pp_flags & PP_NEEDAUTH) {
4662 * Remote is authenticator, but his auth proto didn't
4663 * complete yet. Defer the transition to network
4670 sppp_phase_network(sp);
4674 sppp_pap_tld(struct sppp *sp)
4679 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
4680 callout_stop(&sp->timeout[IDX_PAP]);
4681 callout_stop(&sp->pap_my_to);
4682 sp->lcp.protos &= ~(1 << IDX_PAP);
4688 sppp_pap_scr(struct sppp *sp)
4690 u_char idlen, pwdlen;
4692 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP];
4693 pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
4694 idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
4696 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
4697 sizeof idlen, (const char *)&idlen,
4698 (size_t)idlen, sp->myauth.name,
4699 sizeof pwdlen, (const char *)&pwdlen,
4700 (size_t)pwdlen, sp->myauth.secret,
4705 * Random miscellaneous functions.
4709 * Send a PAP or CHAP proto packet.
4711 * Varadic function, each of the elements for the ellipsis is of type
4712 * ``size_t mlen, const u_char *msg''. Processing will stop iff
4714 * NOTE: never declare variadic functions with types subject to type
4715 * promotion (i.e. u_char). This is asking for big trouble depending
4716 * on the architecture you are on...
4720 sppp_auth_send(const struct cp *cp, struct sppp *sp,
4721 unsigned int type, unsigned int id,
4725 struct ppp_header *h;
4726 struct lcp_header *lh;
4734 MGETHDR (m, MB_DONTWAIT, MT_DATA);
4737 m->m_pkthdr.rcvif = 0;
4739 h = mtod (m, struct ppp_header*);
4740 h->address = PPP_ALLSTATIONS; /* broadcast address */
4741 h->control = PPP_UI; /* Unnumbered Info */
4742 h->protocol = htons(cp->proto);
4744 lh = (struct lcp_header*)(h + 1);
4747 p = (u_char*) (lh+1);
4752 while ((mlen = (unsigned int)__va_arg(ap, size_t)) != 0) {
4753 msg = __va_arg(ap, const char *);
4755 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
4761 bcopy(msg, p, mlen);
4766 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
4767 lh->len = htons (LCP_HEADER_LEN + len);
4770 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
4771 SPP_ARGS(ifp), cp->name,
4772 sppp_auth_type_name(cp->proto, lh->type),
4773 lh->ident, ntohs(lh->len));
4774 sppp_print_bytes((u_char*) (lh+1), len);
4777 if (IF_QFULL (&sp->pp_cpq)) {
4778 IF_DROP (&sp->pp_fastq);
4779 IF_DROP (&ifp->if_snd);
4783 IF_ENQUEUE (&sp->pp_cpq, m);
4784 if (! (ifp->if_flags & IFF_OACTIVE))
4785 (*ifp->if_start) (ifp);
4786 ifp->if_obytes += m->m_pkthdr.len + 3;
4790 * Send keepalive packets, every 10 seconds.
4793 sppp_keepalive(void *dummy)
4799 for (sp=spppq; sp; sp=sp->pp_next) {
4800 struct ifnet *ifp = &sp->pp_if;
4802 /* Keepalive mode disabled or channel down? */
4803 if (! (sp->pp_flags & PP_KEEPALIVE) ||
4804 ! (ifp->if_flags & IFF_RUNNING))
4807 /* No keepalive in PPP mode if LCP not opened yet. */
4808 if (sp->pp_mode != IFF_CISCO &&
4809 sp->pp_phase < PHASE_AUTHENTICATE)
4812 if (sp->pp_alivecnt == MAXALIVECNT) {
4813 /* No keepalive packets got. Stop the interface. */
4814 kprintf (SPP_FMT "down\n", SPP_ARGS(ifp));
4816 IF_DRAIN(&sp->pp_cpq);
4817 if (sp->pp_mode != IFF_CISCO) {
4819 /* Shut down the PPP link. */
4821 /* Initiate negotiation. XXX */
4825 ifnet_serialize_all(ifp);
4826 if (sp->pp_alivecnt <= MAXALIVECNT)
4828 if (sp->pp_mode == IFF_CISCO)
4829 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ,
4830 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]);
4831 else if (sp->pp_phase >= PHASE_AUTHENTICATE) {
4832 long nmagic = htonl (sp->lcp.magic);
4833 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP];
4834 sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
4835 sp->lcp.echoid, 4, &nmagic);
4837 ifnet_deserialize_all(ifp);
4839 callout_reset(&keepalive_timeout, hz * 10, sppp_keepalive, NULL);
4844 * Get both IP addresses.
4847 sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
4849 struct ifnet *ifp = &sp->pp_if;
4850 struct ifaddr_container *ifac;
4852 struct sockaddr_in *si, *sm;
4858 * Pick the first AF_INET address from the list,
4859 * aliases don't make any sense on a p2p link anyway.
4862 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
4864 if (ifa->ifa_addr->sa_family == AF_INET) {
4865 si = (struct sockaddr_in *)ifa->ifa_addr;
4866 sm = (struct sockaddr_in *)ifa->ifa_netmask;
4872 if (si && si->sin_addr.s_addr) {
4873 ssrc = si->sin_addr.s_addr;
4875 *srcmask = ntohl(sm->sin_addr.s_addr);
4878 si = (struct sockaddr_in *)ifa->ifa_dstaddr;
4879 if (si && si->sin_addr.s_addr)
4880 ddst = si->sin_addr.s_addr;
4883 if (dst) *dst = ntohl(ddst);
4884 if (src) *src = ntohl(ssrc);
4888 * Set my IP address. Must be called at splimp.
4891 sppp_set_ip_addr(struct sppp *sp, u_long src)
4894 struct ifaddr_container *ifac;
4895 struct ifaddr *ifa = NULL;
4896 struct sockaddr_in *si;
4897 struct in_ifaddr *ia;
4900 * Pick the first AF_INET address from the list,
4901 * aliases don't make any sense on a p2p link anyway.
4904 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
4906 if (ifa->ifa_addr->sa_family == AF_INET) {
4907 si = (struct sockaddr_in *)ifa->ifa_addr;
4913 if (ifac != NULL && si != NULL) {
4915 #if __NetBSD_Version__ >= 103080000
4916 struct sockaddr_in new_sin = *si;
4918 new_sin.sin_addr.s_addr = htonl(src);
4919 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 1);
4922 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: in_ifinit "
4923 " failed, error=%d\n", SPP_ARGS(ifp), error);
4926 /* delete old route */
4927 error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
4930 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
4931 SPP_ARGS(ifp), error);
4935 in_iahash_remove(ia);
4937 /* set new address */
4938 si->sin_addr.s_addr = htonl(src);
4939 in_iahash_insert(ia);
4942 error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);
4945 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
4946 SPP_ARGS(ifp), error);
4954 * Get both IPv6 addresses.
4957 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst,
4958 struct in6_addr *srcmask)
4960 struct ifnet *ifp = &sp->pp_if;
4961 struct ifaddr_container *ifac;
4963 struct sockaddr_in6 *si, *sm;
4964 struct in6_addr ssrc, ddst;
4967 bzero(&ssrc, sizeof(ssrc));
4968 bzero(&ddst, sizeof(ddst));
4970 * Pick the first link-local AF_INET6 address from the list,
4971 * aliases don't make any sense on a p2p link anyway.
4974 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
4976 if (ifa->ifa_addr->sa_family == AF_INET6) {
4977 si = (struct sockaddr_in6 *)ifa->ifa_addr;
4978 sm = (struct sockaddr_in6 *)ifa->ifa_netmask;
4979 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr))
4984 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) {
4985 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc));
4987 bcopy(&sm->sin6_addr, srcmask,
4992 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
4993 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr))
4994 bcopy(&si->sin6_addr, &ddst, sizeof(ddst));
4998 bcopy(&ddst, dst, sizeof(*dst));
5000 bcopy(&ssrc, src, sizeof(*src));
5003 #ifdef IPV6CP_MYIFID_DYN
5005 * Generate random ifid.
5008 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr)
5014 * Set my IPv6 address. Must be called at splimp.
5017 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src)
5020 struct ifaddr_container *ifac;
5022 struct sockaddr_in6 *sin6;
5025 * Pick the first link-local AF_INET6 address from the list,
5026 * aliases don't make any sense on a p2p link anyway.
5030 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
5032 if (ifa->ifa_addr->sa_family == AF_INET6) {
5033 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
5034 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
5039 if (ifac != NULL && sin6 != NULL) {
5041 struct sockaddr_in6 new_sin6 = *sin6;
5043 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr));
5044 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1);
5045 if (debug && error) {
5046 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit "
5047 " failed, error=%d\n", SPP_ARGS(ifp), error);
5054 * Suggest a candidate address to be used by peer.
5057 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest)
5059 struct in6_addr myaddr;
5062 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
5064 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */
5066 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) {
5067 myaddr.s6_addr[14] ^= 0xff;
5068 myaddr.s6_addr[15] ^= 0xff;
5070 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff);
5071 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff);
5074 bcopy(&myaddr, suggest, sizeof(myaddr));
5079 sppp_params(struct sppp *sp, u_long cmd, void *data)
5082 struct ifreq *ifr = (struct ifreq *)data;
5083 struct spppreq *spr;
5086 spr = kmalloc(sizeof(struct spppreq), M_TEMP, M_INTWAIT);
5089 * ifr->ifr_data is supposed to point to a struct spppreq.
5090 * Check the cmd word first before attempting to fetch all the
5093 if ((subcmd = fuword(ifr->ifr_data)) == -1) {
5098 if (copyin((caddr_t)ifr->ifr_data, spr, sizeof(struct spppreq)) != 0) {
5104 case (int)SPPPIOGDEFS:
5105 if (cmd != SIOCGIFGENERIC) {
5110 * We copy over the entire current state, but clean
5111 * out some of the stuff we don't wanna pass up.
5112 * Remember, SIOCGIFGENERIC is unprotected, and can be
5113 * called by any user. No need to ever get PAP or
5114 * CHAP secrets back to userland anyway.
5116 spr->defs.pp_phase = sp->pp_phase;
5117 spr->defs.enable_vj = (sp->confflags & CONF_ENABLE_VJ) != 0;
5118 spr->defs.enable_ipv6 = (sp->confflags & CONF_ENABLE_IPV6) != 0;
5119 spr->defs.lcp = sp->lcp;
5120 spr->defs.ipcp = sp->ipcp;
5121 spr->defs.ipv6cp = sp->ipv6cp;
5122 spr->defs.myauth = sp->myauth;
5123 spr->defs.hisauth = sp->hisauth;
5124 bzero(spr->defs.myauth.secret, AUTHKEYLEN);
5125 bzero(spr->defs.myauth.challenge, AUTHKEYLEN);
5126 bzero(spr->defs.hisauth.secret, AUTHKEYLEN);
5127 bzero(spr->defs.hisauth.challenge, AUTHKEYLEN);
5129 * Fixup the LCP timeout value to milliseconds so
5130 * spppcontrol doesn't need to bother about the value
5131 * of "hz". We do the reverse calculation below when
5134 spr->defs.lcp.timeout = sp->lcp.timeout * 1000 / hz;
5135 rv = copyout(spr, (caddr_t)ifr->ifr_data,
5136 sizeof(struct spppreq));
5139 case (int)SPPPIOSDEFS:
5140 if (cmd != SIOCSIFGENERIC) {
5145 * We have a very specific idea of which fields we
5146 * allow being passed back from userland, so to not
5147 * clobber our current state. For one, we only allow
5148 * setting anything if LCP is in dead or establish
5149 * phase. Once the authentication negotiations
5150 * started, the authentication settings must not be
5151 * changed again. (The administrator can force an
5152 * ifconfig down in order to get LCP back into dead
5155 * Also, we only allow for authentication parameters to be
5158 * XXX Should allow to set or clear pp_flags.
5160 * Finally, if the respective authentication protocol to
5161 * be used is set differently than 0, but the secret is
5162 * passed as all zeros, we don't trash the existing secret.
5163 * This allows an administrator to change the system name
5164 * only without clobbering the secret (which he didn't get
5165 * back in a previous SPPPIOGDEFS call). However, the
5166 * secrets are cleared if the authentication protocol is
5168 if (sp->pp_phase != PHASE_DEAD &&
5169 sp->pp_phase != PHASE_ESTABLISH) {
5174 if ((spr->defs.myauth.proto != 0 && spr->defs.myauth.proto != PPP_PAP &&
5175 spr->defs.myauth.proto != PPP_CHAP) ||
5176 (spr->defs.hisauth.proto != 0 && spr->defs.hisauth.proto != PPP_PAP &&
5177 spr->defs.hisauth.proto != PPP_CHAP)) {
5182 if (spr->defs.myauth.proto == 0)
5183 /* resetting myauth */
5184 bzero(&sp->myauth, sizeof sp->myauth);
5186 /* setting/changing myauth */
5187 sp->myauth.proto = spr->defs.myauth.proto;
5188 bcopy(spr->defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
5189 if (spr->defs.myauth.secret[0] != '\0')
5190 bcopy(spr->defs.myauth.secret, sp->myauth.secret,
5193 if (spr->defs.hisauth.proto == 0)
5194 /* resetting hisauth */
5195 bzero(&sp->hisauth, sizeof sp->hisauth);
5197 /* setting/changing hisauth */
5198 sp->hisauth.proto = spr->defs.hisauth.proto;
5199 sp->hisauth.flags = spr->defs.hisauth.flags;
5200 bcopy(spr->defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
5201 if (spr->defs.hisauth.secret[0] != '\0')
5202 bcopy(spr->defs.hisauth.secret, sp->hisauth.secret,
5205 /* set LCP restart timer timeout */
5206 if (spr->defs.lcp.timeout != 0)
5207 sp->lcp.timeout = spr->defs.lcp.timeout * hz / 1000;
5208 /* set VJ enable and IPv6 disable flags */
5210 if (spr->defs.enable_vj)
5211 sp->confflags |= CONF_ENABLE_VJ;
5213 sp->confflags &= ~CONF_ENABLE_VJ;
5216 if (spr->defs.enable_ipv6)
5217 sp->confflags |= CONF_ENABLE_IPV6;
5219 sp->confflags &= ~CONF_ENABLE_IPV6;
5234 sppp_phase_network(struct sppp *sp)
5240 sp->pp_phase = PHASE_NETWORK;
5243 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
5244 sppp_phase_name(sp->pp_phase));
5246 /* Notify NCPs now. */
5247 for (i = 0; i < IDX_COUNT; i++)
5248 if ((cps[i])->flags & CP_NCP)
5251 /* Send Up events to all NCPs. */
5252 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
5253 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP))
5256 /* if no NCP is starting, all this was in vain, close down */
5257 sppp_lcp_check_and_close(sp);
5262 sppp_cp_type_name(u_char type)
5264 static char buf[12];
5266 case CONF_REQ: return "conf-req";
5267 case CONF_ACK: return "conf-ack";
5268 case CONF_NAK: return "conf-nak";
5269 case CONF_REJ: return "conf-rej";
5270 case TERM_REQ: return "term-req";
5271 case TERM_ACK: return "term-ack";
5272 case CODE_REJ: return "code-rej";
5273 case PROTO_REJ: return "proto-rej";
5274 case ECHO_REQ: return "echo-req";
5275 case ECHO_REPLY: return "echo-reply";
5276 case DISC_REQ: return "discard-req";
5278 ksnprintf (buf, sizeof(buf), "cp/0x%x", type);
5283 sppp_auth_type_name(u_short proto, u_char type)
5285 static char buf[12];
5289 case CHAP_CHALLENGE: return "challenge";
5290 case CHAP_RESPONSE: return "response";
5291 case CHAP_SUCCESS: return "success";
5292 case CHAP_FAILURE: return "failure";
5296 case PAP_REQ: return "req";
5297 case PAP_ACK: return "ack";
5298 case PAP_NAK: return "nak";
5301 ksnprintf (buf, sizeof(buf), "auth/0x%x", type);
5306 sppp_lcp_opt_name(u_char opt)
5308 static char buf[12];
5310 case LCP_OPT_MRU: return "mru";
5311 case LCP_OPT_ASYNC_MAP: return "async-map";
5312 case LCP_OPT_AUTH_PROTO: return "auth-proto";
5313 case LCP_OPT_QUAL_PROTO: return "qual-proto";
5314 case LCP_OPT_MAGIC: return "magic";
5315 case LCP_OPT_PROTO_COMP: return "proto-comp";
5316 case LCP_OPT_ADDR_COMP: return "addr-comp";
5318 ksnprintf (buf, sizeof(buf), "lcp/0x%x", opt);
5323 sppp_ipcp_opt_name(u_char opt)
5325 static char buf[12];
5327 case IPCP_OPT_ADDRESSES: return "addresses";
5328 case IPCP_OPT_COMPRESSION: return "compression";
5329 case IPCP_OPT_ADDRESS: return "address";
5331 ksnprintf (buf, sizeof(buf), "ipcp/0x%x", opt);
5337 sppp_ipv6cp_opt_name(u_char opt)
5339 static char buf[12];
5341 case IPV6CP_OPT_IFID: return "ifid";
5342 case IPV6CP_OPT_COMPRESSION: return "compression";
5344 ksprintf (buf, "0x%x", opt);
5350 sppp_state_name(int state)
5353 case STATE_INITIAL: return "initial";
5354 case STATE_STARTING: return "starting";
5355 case STATE_CLOSED: return "closed";
5356 case STATE_STOPPED: return "stopped";
5357 case STATE_CLOSING: return "closing";
5358 case STATE_STOPPING: return "stopping";
5359 case STATE_REQ_SENT: return "req-sent";
5360 case STATE_ACK_RCVD: return "ack-rcvd";
5361 case STATE_ACK_SENT: return "ack-sent";
5362 case STATE_OPENED: return "opened";
5368 sppp_phase_name(enum ppp_phase phase)
5371 case PHASE_DEAD: return "dead";
5372 case PHASE_ESTABLISH: return "establish";
5373 case PHASE_TERMINATE: return "terminate";
5374 case PHASE_AUTHENTICATE: return "authenticate";
5375 case PHASE_NETWORK: return "network";
5381 sppp_proto_name(u_short proto)
5383 static char buf[12];
5385 case PPP_LCP: return "lcp";
5386 case PPP_IPCP: return "ipcp";
5387 case PPP_PAP: return "pap";
5388 case PPP_CHAP: return "chap";
5389 case PPP_IPV6CP: return "ipv6cp";
5391 ksnprintf(buf, sizeof(buf), "proto/0x%x", (unsigned)proto);
5396 sppp_print_bytes(const u_char *p, u_short len)
5399 log(-1, " %*D", len, p, "-");
5403 sppp_print_string(const char *p, u_short len)
5410 * Print only ASCII chars directly. RFC 1994 recommends
5411 * using only them, but we don't rely on it. */
5412 if (c < ' ' || c > '~')
5413 log(-1, "\\x%x", c);
5420 sppp_dotted_quad(u_long addr)
5423 ksprintf(s, "%d.%d.%d.%d",
5424 (int)((addr >> 24) & 0xff),
5425 (int)((addr >> 16) & 0xff),
5426 (int)((addr >> 8) & 0xff),
5427 (int)(addr & 0xff));
5432 sppp_strnlen(u_char *p, int max)
5436 for (len = 0; len < max && *p; ++p)
5441 /* a dummy, used to drop uninteresting events */
5443 sppp_null(struct sppp *unused)
5445 /* do just nothing */