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 #include <netns/ns_if.h>
102 #define IOCTL_CMD_T u_long
103 #define MAXALIVECNT 3 /* max. alive packets */
106 * Interface flags that can be set in an ifconfig command.
108 * Setting link0 will make the link passive, i.e. it will be marked
109 * as being administrative openable, but won't be opened to begin
110 * with. Incoming calls will be answered, or subsequent calls with
111 * -link1 will cause the administrative open of the LCP layer.
113 * Setting link1 will cause the link to auto-dial only as packets
116 * Setting IFF_DEBUG will syslog the option negotiation and state
117 * transitions at level kern.debug. Note: all logs consistently look
120 * <if-name><unit>: <proto-name> <additional info...>
122 * with <if-name><unit> being something like "bppp0", and <proto-name>
123 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
126 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
127 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */
128 #define IFF_CISCO IFF_LINK2 /* auto-dial on output */
130 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
131 #define PPP_UI 0x03 /* Unnumbered Information */
132 #define PPP_IP 0x0021 /* Internet Protocol */
133 #define PPP_ISO 0x0023 /* ISO OSI Protocol */
134 #define PPP_XNS 0x0025 /* Xerox NS Protocol */
135 #define PPP_IPX 0x002b /* Novell IPX Protocol */
136 #define PPP_VJ_COMP 0x002d /* VJ compressed TCP/IP */
137 #define PPP_VJ_UCOMP 0x002f /* VJ uncompressed TCP/IP */
138 #define PPP_IPV6 0x0057 /* Internet Protocol Version 6 */
139 #define PPP_LCP 0xc021 /* Link Control Protocol */
140 #define PPP_PAP 0xc023 /* Password Authentication Protocol */
141 #define PPP_CHAP 0xc223 /* Challenge-Handshake Auth Protocol */
142 #define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */
143 #define PPP_IPV6CP 0x8057 /* IPv6 Control Protocol */
145 #define CONF_REQ 1 /* PPP configure request */
146 #define CONF_ACK 2 /* PPP configure acknowledge */
147 #define CONF_NAK 3 /* PPP configure negative ack */
148 #define CONF_REJ 4 /* PPP configure reject */
149 #define TERM_REQ 5 /* PPP terminate request */
150 #define TERM_ACK 6 /* PPP terminate acknowledge */
151 #define CODE_REJ 7 /* PPP code reject */
152 #define PROTO_REJ 8 /* PPP protocol reject */
153 #define ECHO_REQ 9 /* PPP echo request */
154 #define ECHO_REPLY 10 /* PPP echo reply */
155 #define DISC_REQ 11 /* PPP discard request */
157 #define LCP_OPT_MRU 1 /* maximum receive unit */
158 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */
159 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */
160 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */
161 #define LCP_OPT_MAGIC 5 /* magic number */
162 #define LCP_OPT_RESERVED 6 /* reserved */
163 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */
164 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */
166 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */
167 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol (VJ) */
168 #define IPCP_OPT_ADDRESS 3 /* local IP address */
170 #define IPV6CP_OPT_IFID 1 /* interface identifier */
171 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */
173 #define IPCP_COMP_VJ 0x2d /* Code for VJ compression */
175 #define PAP_REQ 1 /* PAP name/password request */
176 #define PAP_ACK 2 /* PAP acknowledge */
177 #define PAP_NAK 3 /* PAP fail */
179 #define CHAP_CHALLENGE 1 /* CHAP challenge request */
180 #define CHAP_RESPONSE 2 /* CHAP challenge response */
181 #define CHAP_SUCCESS 3 /* CHAP response ok */
182 #define CHAP_FAILURE 4 /* CHAP response failed */
184 #define CHAP_MD5 5 /* hash algorithm - MD5 */
186 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */
187 #define CISCO_UNICAST 0x0f /* Cisco unicast address */
188 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
189 #define CISCO_ADDR_REQ 0 /* Cisco address request */
190 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */
191 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
193 /* states are named and numbered according to RFC 1661 */
194 #define STATE_INITIAL 0
195 #define STATE_STARTING 1
196 #define STATE_CLOSED 2
197 #define STATE_STOPPED 3
198 #define STATE_CLOSING 4
199 #define STATE_STOPPING 5
200 #define STATE_REQ_SENT 6
201 #define STATE_ACK_RCVD 7
202 #define STATE_ACK_SENT 8
203 #define STATE_OPENED 9
209 } __attribute__((__packed__));
210 #define PPP_HEADER_LEN sizeof (struct ppp_header)
216 } __attribute__((__packed__));
217 #define LCP_HEADER_LEN sizeof (struct lcp_header)
219 struct cisco_packet {
226 } __attribute__((__packed__));
227 #define CISCO_PACKET_LEN sizeof (struct cisco_packet)
230 * We follow the spelling and capitalization of RFC 1661 here, to make
231 * it easier comparing with the standard. Please refer to this RFC in
232 * case you can't make sense out of these abbreviation; it will also
233 * explain the semantics related to the various events and actions.
236 u_short proto; /* PPP control protocol number */
237 u_char protoidx; /* index into state table in struct sppp */
239 #define CP_LCP 0x01 /* this is the LCP */
240 #define CP_AUTH 0x02 /* this is an authentication protocol */
241 #define CP_NCP 0x04 /* this is a NCP */
242 #define CP_QUAL 0x08 /* this is a quality reporting protocol */
243 const char *name; /* name of this control protocol */
245 void (*Up)(struct sppp *sp);
246 void (*Down)(struct sppp *sp);
247 void (*Open)(struct sppp *sp);
248 void (*Close)(struct sppp *sp);
249 void (*TO)(void *sp);
250 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len);
251 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len);
252 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len);
254 void (*tlu)(struct sppp *sp);
255 void (*tld)(struct sppp *sp);
256 void (*tls)(struct sppp *sp);
257 void (*tlf)(struct sppp *sp);
258 void (*scr)(struct sppp *sp);
261 static struct sppp *spppq;
262 #if defined(__DragonFly__)
263 static struct callout keepalive_timeout;
266 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 && !defined(__DragonFly__)
267 #define SPP_FMT "%s%d: "
268 #define SPP_ARGS(ifp) (ifp)->if_name, (ifp)->if_unit
270 #define SPP_FMT "%s: "
271 #define SPP_ARGS(ifp) (ifp)->if_xname
276 * The following disgusting hack gets around the problem that IP TOS
277 * can't be set yet. We want to put "interactive" traffic on a high
278 * priority queue. To decide if traffic is interactive, we check that
279 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
281 * XXX is this really still necessary? - joerg -
283 static u_short interactive_ports[8] = {
287 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
290 /* almost every function needs these */
292 struct ifnet *ifp = &sp->pp_if; \
293 int debug = ifp->if_flags & IFF_DEBUG
295 static int sppp_output(struct ifnet *ifp, struct mbuf *m,
296 struct sockaddr *dst, struct rtentry *rt);
298 static void sppp_cisco_send(struct sppp *sp, int type, long par1, long par2);
299 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m);
301 static void sppp_cp_input(const struct cp *cp, struct sppp *sp,
303 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
304 u_char ident, u_short len, void *data);
305 /* static void sppp_cp_timeout(void *arg); */
306 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp,
308 static void sppp_auth_send(const struct cp *cp,
309 struct sppp *sp, unsigned int type, unsigned int id,
312 static void sppp_up_event(const struct cp *cp, struct sppp *sp);
313 static void sppp_down_event(const struct cp *cp, struct sppp *sp);
314 static void sppp_open_event(const struct cp *cp, struct sppp *sp);
315 static void sppp_close_event(const struct cp *cp, struct sppp *sp);
316 static void sppp_to_event(const struct cp *cp, struct sppp *sp);
318 static void sppp_null(struct sppp *sp);
320 static void sppp_lcp_init(struct sppp *sp);
321 static void sppp_lcp_up(struct sppp *sp);
322 static void sppp_lcp_down(struct sppp *sp);
323 static void sppp_lcp_open(struct sppp *sp);
324 static void sppp_lcp_close(struct sppp *sp);
325 static void sppp_lcp_TO(void *sp);
326 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
327 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
328 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
329 static void sppp_lcp_tlu(struct sppp *sp);
330 static void sppp_lcp_tld(struct sppp *sp);
331 static void sppp_lcp_tls(struct sppp *sp);
332 static void sppp_lcp_tlf(struct sppp *sp);
333 static void sppp_lcp_scr(struct sppp *sp);
334 static void sppp_lcp_check_and_close(struct sppp *sp);
335 static int sppp_ncp_check(struct sppp *sp);
337 static void sppp_ipcp_init(struct sppp *sp);
338 static void sppp_ipcp_up(struct sppp *sp);
339 static void sppp_ipcp_down(struct sppp *sp);
340 static void sppp_ipcp_open(struct sppp *sp);
341 static void sppp_ipcp_close(struct sppp *sp);
342 static void sppp_ipcp_TO(void *sp);
343 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
344 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
345 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
346 static void sppp_ipcp_tlu(struct sppp *sp);
347 static void sppp_ipcp_tld(struct sppp *sp);
348 static void sppp_ipcp_tls(struct sppp *sp);
349 static void sppp_ipcp_tlf(struct sppp *sp);
350 static void sppp_ipcp_scr(struct sppp *sp);
352 static void sppp_ipv6cp_init(struct sppp *sp);
353 static void sppp_ipv6cp_up(struct sppp *sp);
354 static void sppp_ipv6cp_down(struct sppp *sp);
355 static void sppp_ipv6cp_open(struct sppp *sp);
356 static void sppp_ipv6cp_close(struct sppp *sp);
357 static void sppp_ipv6cp_TO(void *sp);
358 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len);
359 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
360 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
361 static void sppp_ipv6cp_tlu(struct sppp *sp);
362 static void sppp_ipv6cp_tld(struct sppp *sp);
363 static void sppp_ipv6cp_tls(struct sppp *sp);
364 static void sppp_ipv6cp_tlf(struct sppp *sp);
365 static void sppp_ipv6cp_scr(struct sppp *sp);
367 static void sppp_pap_input(struct sppp *sp, struct mbuf *m);
368 static void sppp_pap_init(struct sppp *sp);
369 static void sppp_pap_open(struct sppp *sp);
370 static void sppp_pap_close(struct sppp *sp);
371 static void sppp_pap_TO(void *sp);
372 static void sppp_pap_my_TO(void *sp);
373 static void sppp_pap_tlu(struct sppp *sp);
374 static void sppp_pap_tld(struct sppp *sp);
375 static void sppp_pap_scr(struct sppp *sp);
377 static void sppp_chap_input(struct sppp *sp, struct mbuf *m);
378 static void sppp_chap_init(struct sppp *sp);
379 static void sppp_chap_open(struct sppp *sp);
380 static void sppp_chap_close(struct sppp *sp);
381 static void sppp_chap_TO(void *sp);
382 static void sppp_chap_tlu(struct sppp *sp);
383 static void sppp_chap_tld(struct sppp *sp);
384 static void sppp_chap_scr(struct sppp *sp);
386 static const char *sppp_auth_type_name(u_short proto, u_char type);
387 static const char *sppp_cp_type_name(u_char type);
388 static const char *sppp_dotted_quad(u_long addr);
389 static const char *sppp_ipcp_opt_name(u_char opt);
391 static const char *sppp_ipv6cp_opt_name(u_char opt);
393 static const char *sppp_lcp_opt_name(u_char opt);
394 static const char *sppp_phase_name(enum ppp_phase phase);
395 static const char *sppp_proto_name(u_short proto);
396 static const char *sppp_state_name(int state);
397 static int sppp_params(struct sppp *sp, u_long cmd, void *data);
398 static int sppp_strnlen(u_char *p, int max);
399 static void sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst,
401 static void sppp_keepalive(void *dummy);
402 static void sppp_phase_network(struct sppp *sp);
403 static void sppp_print_bytes(const u_char *p, u_short len);
404 static void sppp_print_string(const char *p, u_short len);
405 static void sppp_set_ip_addr(struct sppp *sp, u_long src);
407 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src,
408 struct in6_addr *dst, struct in6_addr *srcmask);
409 #ifdef IPV6CP_MYIFID_DYN
410 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src);
411 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src);
413 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src);
416 /* our control protocol descriptors */
417 static const struct cp lcp = {
418 PPP_LCP, IDX_LCP, CP_LCP, "lcp",
419 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close,
420 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak,
421 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf,
425 static const struct cp ipcp = {
426 PPP_IPCP, IDX_IPCP, CP_NCP, "ipcp",
427 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close,
428 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak,
429 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf,
433 static const struct cp ipv6cp = {
434 PPP_IPV6CP, IDX_IPV6CP,
435 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/
441 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close,
442 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak,
443 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf,
447 static const struct cp pap = {
448 PPP_PAP, IDX_PAP, CP_AUTH, "pap",
449 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close,
450 sppp_pap_TO, 0, 0, 0,
451 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null,
455 static const struct cp chap = {
456 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap",
457 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close,
458 sppp_chap_TO, 0, 0, 0,
459 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null,
463 static const struct cp *cps[IDX_COUNT] = {
465 &ipcp, /* IDX_IPCP */
466 &ipv6cp, /* IDX_IPV6CP */
468 &chap, /* IDX_CHAP */
472 sppp_modevent(module_t mod, int type, void *unused)
476 callout_init(&keepalive_timeout);
486 static moduledata_t spppmod = {
491 MODULE_VERSION(sppp, 1);
492 DECLARE_MODULE(sppp, spppmod, SI_SUB_DRIVERS, SI_ORDER_ANY);
495 * Exported functions, comprising our interface to the lower layer.
499 * Process the received packet.
502 sppp_input(struct ifnet *ifp, struct mbuf *m)
504 struct ppp_header *h;
506 struct sppp *sp = (struct sppp *)ifp;
508 int hlen, vjlen, do_account = 0;
509 int debug = ifp->if_flags & IFF_DEBUG;
511 if (ifp->if_flags & IFF_UP)
512 /* Count received bytes, add FCS and one flag */
513 ifp->if_ibytes += m->m_pkthdr.len + 3;
515 if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
516 /* Too small packet, drop it. */
519 SPP_FMT "input packet is too small, %d bytes\n",
520 SPP_ARGS(ifp), m->m_pkthdr.len);
529 /* Get PPP header. */
530 h = mtod (m, struct ppp_header*);
531 m_adj (m, PPP_HEADER_LEN);
533 switch (h->address) {
534 case PPP_ALLSTATIONS:
535 if (h->control != PPP_UI)
537 if (sp->pp_mode == IFF_CISCO) {
540 SPP_FMT "PPP packet in Cisco mode "
541 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
543 h->address, h->control, ntohs(h->protocol));
546 switch (ntohs (h->protocol)) {
550 SPP_FMT "rejecting protocol "
551 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
553 h->address, h->control, ntohs(h->protocol));
554 if (sp->state[IDX_LCP] == STATE_OPENED)
555 sppp_cp_send (sp, PPP_LCP, PROTO_REJ,
556 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2,
561 sppp_cp_input(&lcp, sp, m);
565 if (sp->pp_phase >= PHASE_AUTHENTICATE)
566 sppp_pap_input(sp, m);
570 if (sp->pp_phase >= PHASE_AUTHENTICATE)
571 sppp_chap_input(sp, m);
576 if (sp->pp_phase == PHASE_NETWORK)
577 sppp_cp_input(&ipcp, sp, m);
581 if (sp->state[IDX_IPCP] == STATE_OPENED) {
587 if (sp->state[IDX_IPCP] == STATE_OPENED) {
589 sl_uncompress_tcp_core(mtod(m, u_char *),
593 &iphdr, &hlen)) <= 0) {
596 SPP_FMT "VJ uncompress failed on compressed packet\n",
602 * Trim the VJ header off the packet, and prepend
603 * the uncompressed IP header (which will usually
604 * end up in two chained mbufs since there's not
605 * enough leading space in the existing mbuf).
608 M_PREPEND(m, hlen, MB_DONTWAIT);
611 bcopy(iphdr, mtod(m, u_char *), hlen);
618 if (sp->state[IDX_IPCP] == STATE_OPENED) {
619 if (sl_uncompress_tcp_core(mtod(m, u_char *),
621 TYPE_UNCOMPRESSED_TCP,
623 &iphdr, &hlen) != 0) {
626 SPP_FMT "VJ uncompress failed on uncompressed packet\n",
637 if (sp->pp_phase == PHASE_NETWORK)
638 sppp_cp_input(&ipv6cp, sp, m);
643 if (sp->state[IDX_IPV6CP] == STATE_OPENED) {
651 /* IPX IPXCP not implemented yet */
652 if (sp->pp_phase == PHASE_NETWORK) {
660 /* XNS IDPCP not implemented yet */
661 if (sp->pp_phase == PHASE_NETWORK) {
669 case CISCO_MULTICAST:
671 /* Don't check the control field here (RFC 1547). */
672 if (sp->pp_mode != IFF_CISCO) {
675 SPP_FMT "Cisco packet in PPP mode "
676 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
678 h->address, h->control, ntohs(h->protocol));
681 switch (ntohs (h->protocol)) {
685 case CISCO_KEEPALIVE:
686 sppp_cisco_input ((struct sppp*) ifp, m);
715 default: /* Invalid PPP packet. */
719 SPP_FMT "invalid input packet "
720 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
722 h->address, h->control, ntohs(h->protocol));
726 if (! (ifp->if_flags & IFF_UP) || isr < 0)
731 netisr_dispatch(isr, m);
734 * Do only account for network packets, not for control
735 * packets. This is used by some subsystems to detect
738 sp->pp_last_recv = time_second;
742 * Enqueue transmit packet.
745 sppp_output_serialized(struct ifnet *ifp, struct mbuf *m,
746 struct sockaddr *dst, struct rtentry *rt)
748 struct sppp *sp = (struct sppp*) ifp;
749 struct ppp_header *h;
750 struct ifqueue *ifq = NULL;
752 int ipproto = PPP_IP;
753 int debug = ifp->if_flags & IFF_DEBUG;
754 struct altq_pktattr pktattr;
758 if ((ifp->if_flags & IFF_UP) == 0 ||
759 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) {
768 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) {
773 * Hack to prevent the initialization-time generated
774 * IPv6 multicast packet to erroneously cause a
775 * dialout event in case IPv6 has been
776 * administratively disabled on that interface.
778 if (dst->sa_family == AF_INET6 &&
779 !(sp->confflags & CONF_ENABLE_IPV6))
783 * Interface is not yet running, but auto-dial. Need
784 * to start LCP for it.
786 ifp->if_flags |= IFF_RUNNING;
793 * if the queueing discipline needs packet classification,
794 * do it before prepending link headers.
796 ifq_classify(&ifp->if_snd, m, dst->sa_family, &pktattr);
799 if (dst->sa_family == AF_INET) {
800 /* XXX Check mbuf length here? */
801 struct ip *ip = mtod (m, struct ip*);
802 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
805 * When using dynamic local IP address assignment by using
806 * 0.0.0.0 as a local address, the first TCP session will
807 * not connect because the local TCP checksum is computed
808 * using 0.0.0.0 which will later become our real IP address
809 * so the TCP checksum computed at the remote end will
810 * become invalid. So we
811 * - don't let packets with src ip addr 0 thru
812 * - we flag TCP packets with src ip 0 as an error
815 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */
819 if(ip->ip_p == IPPROTO_TCP)
820 return(EADDRNOTAVAIL);
826 * Put low delay, telnet, rlogin and ftp control packets
827 * in front of the queue.
829 if (IF_QFULL (&sp->pp_fastq))
831 else if (ip->ip_tos & IPTOS_LOWDELAY)
833 else if (m->m_len < sizeof *ip + sizeof *tcp)
835 else if (ip->ip_p != IPPROTO_TCP)
837 else if (INTERACTIVE (ntohs (tcp->th_sport)))
839 else if (INTERACTIVE (ntohs (tcp->th_dport)))
843 * Do IP Header compression
845 if (sp->pp_mode != IFF_CISCO && (sp->ipcp.flags & IPCP_VJ) &&
846 ip->ip_p == IPPROTO_TCP)
847 switch (sl_compress_tcp(m, ip, sp->pp_comp,
848 sp->ipcp.compress_cid)) {
849 case TYPE_COMPRESSED_TCP:
850 ipproto = PPP_VJ_COMP;
852 case TYPE_UNCOMPRESSED_TCP:
853 ipproto = PPP_VJ_UCOMP;
867 if (dst->sa_family == AF_INET6) {
868 /* XXX do something tricky here? */
873 * Prepend general data packet PPP header. For now, IP only.
875 M_PREPEND (m, PPP_HEADER_LEN, MB_DONTWAIT);
878 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
885 * May want to check size of packet
886 * (albeit due to the implementation it's always enough)
888 h = mtod (m, struct ppp_header*);
889 if (sp->pp_mode == IFF_CISCO) {
890 h->address = CISCO_UNICAST; /* unicast address */
893 h->address = PPP_ALLSTATIONS; /* broadcast address */
894 h->control = PPP_UI; /* Unnumbered Info */
897 switch (dst->sa_family) {
899 case AF_INET: /* Internet Protocol */
900 if (sp->pp_mode == IFF_CISCO)
901 h->protocol = htons (ETHERTYPE_IP);
904 * Don't choke with an ENETDOWN early. It's
905 * possible that we just started dialing out,
906 * so don't drop the packet immediately. If
907 * we notice that we run out of buffer space
908 * below, we will however remember that we are
909 * not ready to carry IP packets, and return
910 * ENETDOWN, as opposed to ENOBUFS.
912 h->protocol = htons(ipproto);
913 if (sp->state[IDX_IPCP] != STATE_OPENED)
919 case AF_INET6: /* Internet Protocol */
920 if (sp->pp_mode == IFF_CISCO)
921 h->protocol = htons (ETHERTYPE_IPV6);
924 * Don't choke with an ENETDOWN early. It's
925 * possible that we just started dialing out,
926 * so don't drop the packet immediately. If
927 * we notice that we run out of buffer space
928 * below, we will however remember that we are
929 * not ready to carry IP packets, and return
930 * ENETDOWN, as opposed to ENOBUFS.
932 h->protocol = htons(PPP_IPV6);
933 if (sp->state[IDX_IPV6CP] != STATE_OPENED)
939 case AF_NS: /* Xerox NS Protocol */
940 h->protocol = htons (sp->pp_mode == IFF_CISCO ?
941 ETHERTYPE_NS : PPP_XNS);
945 case AF_IPX: /* Novell IPX Protocol */
946 h->protocol = htons (sp->pp_mode == IFF_CISCO ?
947 ETHERTYPE_IPX : PPP_IPX);
954 return (EAFNOSUPPORT);
958 * Queue message on interface, and start output if interface
972 rv = ifq_enqueue(&ifp->if_snd, m, &pktattr);
979 if (! (ifp->if_flags & IFF_OACTIVE))
980 (*ifp->if_start) (ifp);
983 * Count output packets and bytes.
984 * The packet length includes header, FCS and 1 flag,
985 * according to RFC 1333.
987 ifp->if_obytes += m->m_pkthdr.len + 3;
990 * Unlike in sppp_input(), we can always bump the timestamp
991 * here since sppp_output() is only called on behalf of
992 * network-layer traffic; control-layer traffic is handled
995 sp->pp_last_sent = time_second;
1002 sppp_output(struct ifnet *ifp, struct mbuf *m,
1003 struct sockaddr *dst, struct rtentry *rt)
1007 ifnet_serialize_tx(ifp);
1008 error = sppp_output_serialized(ifp, m, dst, rt);
1009 ifnet_deserialize_tx(ifp);
1015 sppp_attach(struct ifnet *ifp)
1017 struct sppp *sp = (struct sppp*) ifp;
1019 /* Initialize keepalive handler. */
1021 callout_reset(&keepalive_timeout, hz * 10,
1022 sppp_keepalive, NULL);
1024 /* Insert new entry into the keepalive list. */
1025 sp->pp_next = spppq;
1028 sp->pp_if.if_mtu = PP_MTU;
1029 sp->pp_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
1030 sp->pp_if.if_type = IFT_PPP;
1031 sp->pp_if.if_output = sppp_output;
1033 sp->pp_flags = PP_KEEPALIVE;
1035 sp->pp_if.if_snd.ifq_maxlen = 32;
1036 sp->pp_fastq.ifq_maxlen = 32;
1037 sp->pp_cpq.ifq_maxlen = 20;
1039 sp->pp_alivecnt = 0;
1040 bzero(&sp->pp_seq[0], sizeof(sp->pp_seq));
1041 bzero(&sp->pp_rseq[0], sizeof(sp->pp_rseq));
1042 sp->pp_phase = PHASE_DEAD;
1044 sp->pp_down = lcp.Down;
1045 sp->pp_last_recv = sp->pp_last_sent = time_second;
1048 sp->confflags |= CONF_ENABLE_VJ;
1051 sp->confflags |= CONF_ENABLE_IPV6;
1053 sp->pp_comp = kmalloc(sizeof(struct slcompress), M_TEMP, M_WAITOK);
1054 sl_compress_init(sp->pp_comp, -1);
1057 sppp_ipv6cp_init(sp);
1063 sppp_detach(struct ifnet *ifp)
1065 struct sppp **q, *p, *sp = (struct sppp*) ifp;
1068 /* Remove the entry from the keepalive list. */
1069 for (q = &spppq; (p = *q); q = &p->pp_next)
1075 /* Stop keepalive handler. */
1077 callout_stop(&keepalive_timeout);
1079 for (i = 0; i < IDX_COUNT; i++)
1080 callout_stop(&sp->timeout[i]);
1081 callout_stop(&sp->pap_my_to);
1085 * Flush the interface output queue.
1088 sppp_flush(struct ifnet *ifp)
1090 struct sppp *sp = (struct sppp*) ifp;
1092 ifq_purge(&sp->pp_if.if_snd);
1093 IF_DRAIN(&sp->pp_fastq);
1094 IF_DRAIN(&sp->pp_cpq);
1098 * Check if the output queue is empty.
1101 sppp_isempty(struct ifnet *ifp)
1103 struct sppp *sp = (struct sppp*) ifp;
1107 empty = IF_QEMPTY(&sp->pp_fastq) && IF_QEMPTY(&sp->pp_cpq) &&
1108 ifq_is_empty(&sp->pp_if.if_snd);
1114 * Get next packet to send.
1117 sppp_dequeue(struct ifnet *ifp)
1119 struct sppp *sp = (struct sppp*) ifp;
1125 * Process only the control protocol queue until we have at
1126 * least one NCP open.
1128 * Do always serve all three queues in Cisco mode.
1130 IF_DEQUEUE(&sp->pp_cpq, m);
1132 (sppp_ncp_check(sp) || sp->pp_mode == IFF_CISCO)) {
1133 IF_DEQUEUE(&sp->pp_fastq, m);
1135 m = ifq_dequeue(&sp->pp_if.if_snd, NULL);
1143 * Pick the next packet, do not remove it from the queue.
1146 sppp_pick(struct ifnet *ifp)
1148 struct sppp *sp = (struct sppp*)ifp;
1153 m = sp->pp_cpq.ifq_head;
1155 (sp->pp_phase == PHASE_NETWORK || sp->pp_mode == IFF_CISCO)) {
1156 if ((m = sp->pp_fastq.ifq_head) == NULL)
1157 m = ifq_poll(&sp->pp_if.if_snd);
1165 * Process an ioctl request. Called on low priority level.
1168 sppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
1170 struct ifreq *ifr = (struct ifreq*) data;
1171 struct sppp *sp = (struct sppp*) ifp;
1172 int rv, going_up, going_down, newmode;
1179 case SIOCSIFDSTADDR:
1183 /* set the interface "up" when assigning an IP address */
1184 ifp->if_flags |= IFF_UP;
1185 /* fall through... */
1188 going_up = ifp->if_flags & IFF_UP &&
1189 (ifp->if_flags & IFF_RUNNING) == 0;
1190 going_down = (ifp->if_flags & IFF_UP) == 0 &&
1191 ifp->if_flags & IFF_RUNNING;
1193 newmode = ifp->if_flags & IFF_PASSIVE;
1195 newmode = ifp->if_flags & IFF_AUTO;
1197 newmode = ifp->if_flags & IFF_CISCO;
1198 ifp->if_flags &= ~(IFF_PASSIVE | IFF_AUTO | IFF_CISCO);
1199 ifp->if_flags |= newmode;
1201 if (newmode != sp->pp_mode) {
1204 going_up = ifp->if_flags & IFF_RUNNING;
1208 if (sp->pp_mode != IFF_CISCO)
1210 else if (sp->pp_tlf)
1213 ifp->if_flags &= ~IFF_RUNNING;
1214 sp->pp_mode = newmode;
1218 if (sp->pp_mode != IFF_CISCO)
1220 sp->pp_mode = newmode;
1221 if (sp->pp_mode == 0) {
1222 ifp->if_flags |= IFF_RUNNING;
1225 if (sp->pp_mode == IFF_CISCO) {
1228 ifp->if_flags |= IFF_RUNNING;
1236 #define ifr_mtu ifr_metric
1239 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru)
1241 ifp->if_mtu = ifr->ifr_mtu;
1246 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru)
1248 ifp->if_mtu = *(short*)data;
1253 ifr->ifr_mtu = ifp->if_mtu;
1258 *(short*)data = ifp->if_mtu;
1265 case SIOCGIFGENERIC:
1266 case SIOCSIFGENERIC:
1267 rv = sppp_params(sp, cmd, data);
1279 * Cisco framing implementation.
1283 * Handle incoming Cisco keepalive protocol packets.
1286 sppp_cisco_input(struct sppp *sp, struct mbuf *m)
1289 struct cisco_packet *h;
1292 if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
1295 SPP_FMT "cisco invalid packet length: %d bytes\n",
1296 SPP_ARGS(ifp), m->m_pkthdr.len);
1299 h = mtod (m, struct cisco_packet*);
1302 SPP_FMT "cisco input: %d bytes "
1303 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1304 SPP_ARGS(ifp), m->m_pkthdr.len,
1305 (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel,
1306 (u_int)h->time0, (u_int)h->time1);
1307 switch (ntohl (h->type)) {
1310 log(-1, SPP_FMT "cisco unknown packet type: 0x%lx\n",
1311 SPP_ARGS(ifp), (u_long)ntohl (h->type));
1313 case CISCO_ADDR_REPLY:
1314 /* Reply on address request, ignore */
1316 case CISCO_KEEPALIVE_REQ:
1317 sp->pp_alivecnt = 0;
1318 sp->pp_rseq[IDX_LCP] = ntohl (h->par1);
1319 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) {
1320 /* Local and remote sequence numbers are equal.
1321 * Probably, the line is in loopback mode. */
1322 if (sp->pp_loopcnt >= MAXALIVECNT) {
1323 kprintf (SPP_FMT "loopback\n",
1326 if (ifp->if_flags & IFF_UP) {
1328 IF_DRAIN(&sp->pp_cpq);
1333 /* Generate new local sequence number */
1334 #if defined(__DragonFly__)
1335 sp->pp_seq[IDX_LCP] = krandom();
1337 sp->pp_seq[IDX_LCP] ^= time.tv_sec ^ time.tv_usec;
1342 if (! (ifp->if_flags & IFF_UP) &&
1343 (ifp->if_flags & IFF_RUNNING)) {
1345 kprintf (SPP_FMT "up\n", SPP_ARGS(ifp));
1348 case CISCO_ADDR_REQ:
1349 sppp_get_ip_addrs(sp, &me, 0, &mymask);
1351 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
1357 * Send Cisco keepalive packet.
1360 sppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
1363 struct ppp_header *h;
1364 struct cisco_packet *ch;
1366 #if defined(__DragonFly__)
1369 u_long t = (time.tv_sec - boottime.tv_sec) * 1000;
1372 #if defined(__DragonFly__)
1373 getmicrouptime(&tv);
1376 MGETHDR (m, MB_DONTWAIT, MT_DATA);
1379 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
1380 m->m_pkthdr.rcvif = 0;
1382 h = mtod (m, struct ppp_header*);
1383 h->address = CISCO_MULTICAST;
1385 h->protocol = htons (CISCO_KEEPALIVE);
1387 ch = (struct cisco_packet*) (h + 1);
1388 ch->type = htonl (type);
1389 ch->par1 = htonl (par1);
1390 ch->par2 = htonl (par2);
1393 #if defined(__DragonFly__)
1394 ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
1395 ch->time1 = htons ((u_short) tv.tv_sec);
1397 ch->time0 = htons ((u_short) (t >> 16));
1398 ch->time1 = htons ((u_short) t);
1403 SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1404 SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1,
1405 (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
1407 if (IF_QFULL (&sp->pp_cpq)) {
1408 IF_DROP (&sp->pp_fastq);
1409 IF_DROP (&ifp->if_snd);
1412 IF_ENQUEUE (&sp->pp_cpq, m);
1413 if (! (ifp->if_flags & IFF_OACTIVE))
1414 (*ifp->if_start) (ifp);
1415 ifp->if_obytes += m->m_pkthdr.len + 3;
1419 * PPP protocol implementation.
1423 * Send PPP control protocol packet.
1426 sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
1427 u_char ident, u_short len, void *data)
1430 struct ppp_header *h;
1431 struct lcp_header *lh;
1434 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
1435 len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
1436 MGETHDR (m, MB_DONTWAIT, MT_DATA);
1439 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
1440 m->m_pkthdr.rcvif = 0;
1442 h = mtod (m, struct ppp_header*);
1443 h->address = PPP_ALLSTATIONS; /* broadcast address */
1444 h->control = PPP_UI; /* Unnumbered Info */
1445 h->protocol = htons (proto); /* Link Control Protocol */
1447 lh = (struct lcp_header*) (h + 1);
1450 lh->len = htons (LCP_HEADER_LEN + len);
1452 bcopy (data, lh+1, len);
1455 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
1457 sppp_proto_name(proto),
1458 sppp_cp_type_name (lh->type), lh->ident,
1460 sppp_print_bytes ((u_char*) (lh+1), len);
1463 if (IF_QFULL (&sp->pp_cpq)) {
1464 IF_DROP (&sp->pp_fastq);
1465 IF_DROP (&ifp->if_snd);
1469 IF_ENQUEUE (&sp->pp_cpq, m);
1470 if (! (ifp->if_flags & IFF_OACTIVE))
1471 (*ifp->if_start) (ifp);
1472 ifp->if_obytes += m->m_pkthdr.len + 3;
1476 * Handle incoming PPP control protocol packets.
1479 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
1482 struct lcp_header *h;
1483 int printlen, len = m->m_pkthdr.len;
1490 SPP_FMT "%s invalid packet length: %d bytes\n",
1491 SPP_ARGS(ifp), cp->name, len);
1494 h = mtod (m, struct lcp_header*);
1496 printlen = ntohs(h->len);
1498 SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
1499 SPP_ARGS(ifp), cp->name,
1500 sppp_state_name(sp->state[cp->protoidx]),
1501 sppp_cp_type_name (h->type), h->ident, printlen);
1505 sppp_print_bytes ((u_char*) (h+1), printlen - 4);
1508 if (len > ntohs (h->len))
1509 len = ntohs (h->len);
1510 p = (u_char *)(h + 1);
1515 log(-1, SPP_FMT "%s invalid conf-req length %d\n",
1516 SPP_ARGS(ifp), cp->name,
1521 /* handle states where RCR doesn't get a SCA/SCN */
1522 switch (sp->state[cp->protoidx]) {
1524 case STATE_STOPPING:
1527 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
1531 rv = (cp->RCR)(sp, h, len);
1533 /* fatal error, shut down */
1538 switch (sp->state[cp->protoidx]) {
1542 /* fall through... */
1543 case STATE_ACK_SENT:
1544 case STATE_REQ_SENT:
1546 * sppp_cp_change_state() have the side effect of
1547 * restarting the timeouts. We want to avoid that
1548 * if the state don't change, otherwise we won't
1549 * ever timeout and resend a configuration request
1552 if (sp->state[cp->protoidx] == (rv ? STATE_ACK_SENT:
1555 sppp_cp_change_state(cp, sp, rv?
1556 STATE_ACK_SENT: STATE_REQ_SENT);
1559 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1561 sppp_cp_change_state(cp, sp, rv?
1562 STATE_ACK_SENT: STATE_REQ_SENT);
1564 case STATE_ACK_RCVD:
1566 sppp_cp_change_state(cp, sp, STATE_OPENED);
1568 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1573 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1576 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1577 SPP_ARGS(ifp), cp->name,
1578 sppp_cp_type_name(h->type),
1579 sppp_state_name(sp->state[cp->protoidx]));
1584 if (h->ident != sp->confid[cp->protoidx]) {
1586 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1587 SPP_ARGS(ifp), cp->name,
1588 h->ident, sp->confid[cp->protoidx]);
1592 switch (sp->state[cp->protoidx]) {
1595 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1598 case STATE_STOPPING:
1600 case STATE_REQ_SENT:
1601 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1602 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1607 case STATE_ACK_RCVD:
1609 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1611 case STATE_ACK_SENT:
1612 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1613 sppp_cp_change_state(cp, sp, STATE_OPENED);
1615 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1616 SPP_ARGS(ifp), cp->name);
1620 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1621 SPP_ARGS(ifp), cp->name,
1622 sppp_cp_type_name(h->type),
1623 sppp_state_name(sp->state[cp->protoidx]));
1629 if (h->ident != sp->confid[cp->protoidx]) {
1631 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1632 SPP_ARGS(ifp), cp->name,
1633 h->ident, sp->confid[cp->protoidx]);
1637 if (h->type == CONF_NAK)
1638 (cp->RCN_nak)(sp, h, len);
1640 (cp->RCN_rej)(sp, h, len);
1642 switch (sp->state[cp->protoidx]) {
1645 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1647 case STATE_REQ_SENT:
1648 case STATE_ACK_SENT:
1649 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1651 * Slow things down a bit if we think we might be
1652 * in loopback. Depend on the timeout to send the
1653 * next configuration request.
1662 case STATE_ACK_RCVD:
1663 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1667 case STATE_STOPPING:
1670 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1671 SPP_ARGS(ifp), cp->name,
1672 sppp_cp_type_name(h->type),
1673 sppp_state_name(sp->state[cp->protoidx]));
1679 switch (sp->state[cp->protoidx]) {
1680 case STATE_ACK_RCVD:
1681 case STATE_ACK_SENT:
1682 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1687 case STATE_STOPPING:
1688 case STATE_REQ_SENT:
1690 /* Send Terminate-Ack packet. */
1692 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
1693 SPP_ARGS(ifp), cp->name);
1694 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1698 sp->rst_counter[cp->protoidx] = 0;
1699 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1703 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1704 SPP_ARGS(ifp), cp->name,
1705 sppp_cp_type_name(h->type),
1706 sppp_state_name(sp->state[cp->protoidx]));
1711 switch (sp->state[cp->protoidx]) {
1714 case STATE_REQ_SENT:
1715 case STATE_ACK_SENT:
1718 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1721 case STATE_STOPPING:
1722 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1725 case STATE_ACK_RCVD:
1726 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1731 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1734 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1735 SPP_ARGS(ifp), cp->name,
1736 sppp_cp_type_name(h->type),
1737 sppp_state_name(sp->state[cp->protoidx]));
1742 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1744 SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
1745 "danger will robinson\n",
1746 SPP_ARGS(ifp), cp->name,
1747 sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
1748 switch (sp->state[cp->protoidx]) {
1751 case STATE_REQ_SENT:
1752 case STATE_ACK_SENT:
1754 case STATE_STOPPING:
1757 case STATE_ACK_RCVD:
1758 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1761 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1762 SPP_ARGS(ifp), cp->name,
1763 sppp_cp_type_name(h->type),
1764 sppp_state_name(sp->state[cp->protoidx]));
1771 const struct cp *upper;
1777 proto = ntohs(*((u_int16_t *)p));
1778 for (i = 0; i < IDX_COUNT; i++) {
1779 if (cps[i]->proto == proto) {
1787 if (catastrophic || debug)
1788 log(catastrophic? LOG_INFO: LOG_DEBUG,
1789 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n",
1790 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+',
1791 sppp_cp_type_name(h->type), proto,
1792 upper ? upper->name : "unknown",
1793 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?");
1796 * if we got RXJ+ against conf-req, the peer does not implement
1797 * this particular protocol type. terminate the protocol.
1799 if (upper && !catastrophic) {
1800 if (sp->state[upper->protoidx] == STATE_REQ_SENT) {
1806 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1807 switch (sp->state[cp->protoidx]) {
1810 case STATE_REQ_SENT:
1811 case STATE_ACK_SENT:
1813 case STATE_STOPPING:
1816 case STATE_ACK_RCVD:
1817 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1820 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1821 SPP_ARGS(ifp), cp->name,
1822 sppp_cp_type_name(h->type),
1823 sppp_state_name(sp->state[cp->protoidx]));
1829 if (cp->proto != PPP_LCP)
1831 /* Discard the packet. */
1834 if (cp->proto != PPP_LCP)
1836 if (sp->state[cp->protoidx] != STATE_OPENED) {
1838 log(-1, SPP_FMT "lcp echo req but lcp closed\n",
1845 log(-1, SPP_FMT "invalid lcp echo request "
1846 "packet length: %d bytes\n",
1847 SPP_ARGS(ifp), len);
1850 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
1851 ntohl (*(long*)(h+1)) == sp->lcp.magic) {
1852 /* Line loopback mode detected. */
1853 kprintf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
1854 sp->pp_loopcnt = MAXALIVECNT * 5;
1856 IF_DRAIN(&sp->pp_cpq);
1858 /* Shut down the PPP link. */
1864 *(long*)(h+1) = htonl (sp->lcp.magic);
1866 log(-1, SPP_FMT "got lcp echo req, sending echo rep\n",
1868 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
1871 if (cp->proto != PPP_LCP)
1873 if (h->ident != sp->lcp.echoid) {
1879 log(-1, SPP_FMT "lcp invalid echo reply "
1880 "packet length: %d bytes\n",
1881 SPP_ARGS(ifp), len);
1885 log(-1, SPP_FMT "lcp got echo rep\n",
1887 if (!(sp->lcp.opts & (1 << LCP_OPT_MAGIC)) ||
1888 ntohl (*(long*)(h+1)) != sp->lcp.magic)
1889 sp->pp_alivecnt = 0;
1892 /* Unknown packet type -- send Code-Reject packet. */
1895 log(-1, SPP_FMT "%s send code-rej for 0x%x\n",
1896 SPP_ARGS(ifp), cp->name, h->type);
1897 sppp_cp_send(sp, cp->proto, CODE_REJ,
1898 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h);
1905 * The generic part of all Up/Down/Open/Close/TO event handlers.
1906 * Basically, the state transition handling in the automaton.
1909 sppp_up_event(const struct cp *cp, struct sppp *sp)
1914 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
1915 SPP_ARGS(ifp), cp->name,
1916 sppp_state_name(sp->state[cp->protoidx]));
1918 switch (sp->state[cp->protoidx]) {
1920 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1922 case STATE_STARTING:
1923 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1925 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1928 kprintf(SPP_FMT "%s illegal up in state %s\n",
1929 SPP_ARGS(ifp), cp->name,
1930 sppp_state_name(sp->state[cp->protoidx]));
1935 sppp_down_event(const struct cp *cp, struct sppp *sp)
1940 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
1941 SPP_ARGS(ifp), cp->name,
1942 sppp_state_name(sp->state[cp->protoidx]));
1944 switch (sp->state[cp->protoidx]) {
1947 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1950 sppp_cp_change_state(cp, sp, STATE_STARTING);
1953 case STATE_STOPPING:
1954 case STATE_REQ_SENT:
1955 case STATE_ACK_RCVD:
1956 case STATE_ACK_SENT:
1957 sppp_cp_change_state(cp, sp, STATE_STARTING);
1961 sppp_cp_change_state(cp, sp, STATE_STARTING);
1964 kprintf(SPP_FMT "%s illegal down in state %s\n",
1965 SPP_ARGS(ifp), cp->name,
1966 sppp_state_name(sp->state[cp->protoidx]));
1972 sppp_open_event(const struct cp *cp, struct sppp *sp)
1977 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
1978 SPP_ARGS(ifp), cp->name,
1979 sppp_state_name(sp->state[cp->protoidx]));
1981 switch (sp->state[cp->protoidx]) {
1983 sppp_cp_change_state(cp, sp, STATE_STARTING);
1986 case STATE_STARTING:
1989 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1991 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1995 * Try escaping stopped state. This seems to bite
1996 * people occasionally, in particular for IPCP,
1997 * presumably following previous IPCP negotiation
1998 * aborts. Somehow, we must have missed a Down event
1999 * which would have caused a transition into starting
2000 * state, so as a bandaid we force the Down event now.
2001 * This effectively implements (something like the)
2002 * `restart' option mentioned in the state transition
2003 * table of RFC 1661.
2005 sppp_cp_change_state(cp, sp, STATE_STARTING);
2008 case STATE_STOPPING:
2009 case STATE_REQ_SENT:
2010 case STATE_ACK_RCVD:
2011 case STATE_ACK_SENT:
2015 sppp_cp_change_state(cp, sp, STATE_STOPPING);
2022 sppp_close_event(const struct cp *cp, struct sppp *sp)
2027 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
2028 SPP_ARGS(ifp), cp->name,
2029 sppp_state_name(sp->state[cp->protoidx]));
2031 switch (sp->state[cp->protoidx]) {
2036 case STATE_STARTING:
2037 sppp_cp_change_state(cp, sp, STATE_INITIAL);
2041 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2043 case STATE_STOPPING:
2044 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2049 case STATE_REQ_SENT:
2050 case STATE_ACK_RCVD:
2051 case STATE_ACK_SENT:
2052 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
2053 sppp_cp_send(sp, cp->proto, TERM_REQ,
2054 ++sp->pp_seq[cp->protoidx], 0, 0);
2055 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2061 sppp_to_event(const struct cp *cp, struct sppp *sp)
2068 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
2069 SPP_ARGS(ifp), cp->name,
2070 sppp_state_name(sp->state[cp->protoidx]),
2071 sp->rst_counter[cp->protoidx]);
2073 if (--sp->rst_counter[cp->protoidx] < 0)
2075 switch (sp->state[cp->protoidx]) {
2077 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2080 case STATE_STOPPING:
2081 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2084 case STATE_REQ_SENT:
2085 case STATE_ACK_RCVD:
2086 case STATE_ACK_SENT:
2087 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2093 switch (sp->state[cp->protoidx]) {
2095 case STATE_STOPPING:
2096 sppp_cp_send(sp, cp->proto, TERM_REQ,
2097 ++sp->pp_seq[cp->protoidx], 0, 0);
2098 callout_reset(&sp->timeout[cp->protoidx],
2099 sp->lcp.timeout, cp->TO, sp);
2101 case STATE_REQ_SENT:
2102 case STATE_ACK_RCVD:
2104 /* sppp_cp_change_state() will restart the timer */
2105 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
2107 case STATE_ACK_SENT:
2109 callout_reset(&sp->timeout[cp->protoidx],
2110 sp->lcp.timeout, cp->TO, sp);
2118 * Change the state of a control protocol in the state automaton.
2119 * Takes care of starting/stopping the restart timer.
2122 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
2124 sp->state[cp->protoidx] = newstate;
2125 callout_stop(&sp->timeout[cp->protoidx]);
2129 case STATE_STARTING:
2135 case STATE_STOPPING:
2136 case STATE_REQ_SENT:
2137 case STATE_ACK_RCVD:
2138 case STATE_ACK_SENT:
2139 callout_reset(&sp->timeout[cp->protoidx],
2140 sp->lcp.timeout, cp->TO, sp);
2146 *--------------------------------------------------------------------------*
2148 * The LCP implementation. *
2150 *--------------------------------------------------------------------------*
2153 sppp_lcp_init(struct sppp *sp)
2155 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2157 sp->state[IDX_LCP] = STATE_INITIAL;
2158 sp->fail_counter[IDX_LCP] = 0;
2159 sp->pp_seq[IDX_LCP] = 0;
2160 sp->pp_rseq[IDX_LCP] = 0;
2162 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2164 /* Note that these values are relevant for all control protocols */
2165 sp->lcp.timeout = 3 * hz;
2166 sp->lcp.max_terminate = 2;
2167 sp->lcp.max_configure = 10;
2168 sp->lcp.max_failure = 10;
2169 #if defined(__DragonFly__)
2170 callout_init(&sp->timeout[IDX_LCP]);
2175 sppp_lcp_up(struct sppp *sp)
2179 sp->pp_alivecnt = 0;
2180 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2183 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2185 * If this interface is passive or dial-on-demand, and we are
2186 * still in Initial state, it means we've got an incoming
2187 * call. Activate the interface.
2189 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
2192 SPP_FMT "Up event", SPP_ARGS(ifp));
2193 ifp->if_flags |= IFF_RUNNING;
2194 if (sp->state[IDX_LCP] == STATE_INITIAL) {
2196 log(-1, "(incoming call)\n");
2197 sp->pp_flags |= PP_CALLIN;
2201 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 &&
2202 (sp->state[IDX_LCP] == STATE_INITIAL)) {
2203 ifp->if_flags |= IFF_RUNNING;
2207 sppp_up_event(&lcp, sp);
2211 sppp_lcp_down(struct sppp *sp)
2215 sppp_down_event(&lcp, sp);
2218 * If this is neither a dial-on-demand nor a passive
2219 * interface, simulate an ``ifconfig down'' action, so the
2220 * administrator can force a redial by another ``ifconfig
2221 * up''. XXX For leased line operation, should we immediately
2222 * try to reopen the connection here?
2224 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
2226 SPP_FMT "Down event, taking interface down.\n",
2232 SPP_FMT "Down event (carrier loss)\n",
2234 sp->pp_flags &= ~PP_CALLIN;
2235 if (sp->state[IDX_LCP] != STATE_INITIAL)
2237 ifp->if_flags &= ~IFF_RUNNING;
2242 sppp_lcp_open(struct sppp *sp)
2245 * If we are authenticator, negotiate LCP_AUTH
2247 if (sp->hisauth.proto != 0)
2248 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
2250 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2251 sp->pp_flags &= ~PP_NEEDAUTH;
2252 sppp_open_event(&lcp, sp);
2256 sppp_lcp_close(struct sppp *sp)
2258 sppp_close_event(&lcp, sp);
2262 sppp_lcp_TO(void *cookie)
2264 sppp_to_event(&lcp, (struct sppp *)cookie);
2268 * Analyze a configure request. Return true if it was agreeable, and
2269 * caused action sca, false if it has been rejected or nak'ed, and
2270 * caused action scn. (The return value is used to make the state
2271 * transition decision in the state automaton.)
2274 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2277 u_char *buf, *r, *p;
2284 buf = r = kmalloc (len, M_TEMP, M_INTWAIT);
2287 log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
2290 /* pass 1: check for things that need to be rejected */
2292 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2293 /* Sanity check option length */
2295 /* Malicious option - drop immediately.
2296 * XXX Maybe we should just RXJ it?
2298 log(-1, "%s: received malicious LCP option 0x%02x, "
2299 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname,
2304 log(-1, " %s ", sppp_lcp_opt_name(*p));
2308 if (len >= 6 && p[1] == 6)
2311 log(-1, "[invalid] ");
2313 case LCP_OPT_ASYNC_MAP:
2314 /* Async control character map. */
2315 if (len >= 6 && p[1] == 6)
2318 log(-1, "[invalid] ");
2321 /* Maximum receive unit. */
2322 if (len >= 4 && p[1] == 4)
2325 log(-1, "[invalid] ");
2327 case LCP_OPT_AUTH_PROTO:
2330 log(-1, "[invalid] ");
2333 authproto = (p[2] << 8) + p[3];
2334 if (authproto == PPP_CHAP && p[1] != 5) {
2336 log(-1, "[invalid chap len] ");
2339 if (sp->myauth.proto == 0) {
2340 /* we are not configured to do auth */
2342 log(-1, "[not configured] ");
2346 * Remote want us to authenticate, remember this,
2347 * so we stay in PHASE_AUTHENTICATE after LCP got
2350 sp->pp_flags |= PP_NEEDAUTH;
2353 /* Others not supported. */
2358 /* Add the option to rejected list. */
2365 log(-1, " send conf-rej\n");
2366 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2372 * pass 2: check for option values that are unacceptable and
2373 * thus require to be nak'ed.
2376 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
2381 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2383 log(-1, " %s ", sppp_lcp_opt_name(*p));
2386 /* Magic number -- extract. */
2387 nmagic = (u_long)p[2] << 24 |
2388 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2389 if (nmagic != sp->lcp.magic) {
2392 log(-1, "0x%lx ", nmagic);
2395 if (debug && sp->pp_loopcnt < MAXALIVECNT*5)
2396 log(-1, "[glitch] ");
2399 * We negate our magic here, and NAK it. If
2400 * we see it later in an NAK packet, we
2401 * suggest a new one.
2403 nmagic = ~sp->lcp.magic;
2405 p[2] = nmagic >> 24;
2406 p[3] = nmagic >> 16;
2411 case LCP_OPT_ASYNC_MAP:
2413 * Async control character map -- just ignore it.
2415 * Quote from RFC 1662, chapter 6:
2416 * To enable this functionality, synchronous PPP
2417 * implementations MUST always respond to the
2418 * Async-Control-Character-Map Configuration
2419 * Option with the LCP Configure-Ack. However,
2420 * acceptance of the Configuration Option does
2421 * not imply that the synchronous implementation
2422 * will do any ACCM mapping. Instead, all such
2423 * octet mapping will be performed by the
2424 * asynchronous-to-synchronous converter.
2430 * Maximum receive unit. Always agreeable,
2431 * but ignored by now.
2433 sp->lcp.their_mru = p[2] * 256 + p[3];
2435 log(-1, "%lu ", sp->lcp.their_mru);
2438 case LCP_OPT_AUTH_PROTO:
2439 authproto = (p[2] << 8) + p[3];
2440 if (sp->myauth.proto != authproto) {
2441 /* not agreed, nak */
2443 log(-1, "[mine %s != his %s] ",
2444 sppp_proto_name(sp->hisauth.proto),
2445 sppp_proto_name(authproto));
2446 p[2] = sp->myauth.proto >> 8;
2447 p[3] = sp->myauth.proto;
2450 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
2452 log(-1, "[chap not MD5] ");
2458 /* Add the option to nak'ed list. */
2465 * Local and remote magics equal -- loopback?
2467 if (sp->pp_loopcnt >= MAXALIVECNT*5) {
2468 if (sp->pp_loopcnt == MAXALIVECNT*5)
2469 kprintf (SPP_FMT "loopback\n",
2471 if (ifp->if_flags & IFF_UP) {
2473 IF_DRAIN(&sp->pp_cpq);
2478 } else if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
2480 log(-1, " max_failure (%d) exceeded, "
2482 sp->lcp.max_failure);
2483 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2486 log(-1, " send conf-nak\n");
2487 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
2491 log(-1, " send conf-ack\n");
2492 sp->fail_counter[IDX_LCP] = 0;
2494 sppp_cp_send (sp, PPP_LCP, CONF_ACK,
2495 h->ident, origlen, h+1);
2498 kfree (buf, M_TEMP);
2507 * Analyze the LCP Configure-Reject option list, and adjust our
2511 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
2517 buf = kmalloc (len, M_TEMP, M_INTWAIT);
2520 log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
2524 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2525 /* Sanity check option length */
2528 * Malicious option - drop immediately.
2529 * XXX Maybe we should just RXJ it?
2531 log(-1, "%s: received malicious LCP option, "
2532 "dropping.\n", ifp->if_xname);
2536 log(-1, " %s ", sppp_lcp_opt_name(*p));
2539 /* Magic number -- can't use it, use 0 */
2540 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
2545 * Should not be rejected anyway, since we only
2546 * negotiate a MRU if explicitly requested by
2549 sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
2551 case LCP_OPT_AUTH_PROTO:
2553 * Peer doesn't want to authenticate himself,
2554 * deny unless this is a dialout call, and
2555 * AUTHFLAG_NOCALLOUT is set.
2557 if ((sp->pp_flags & PP_CALLIN) == 0 &&
2558 (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
2560 log(-1, "[don't insist on auth "
2562 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2566 log(-1, "[access denied]\n");
2574 kfree (buf, M_TEMP);
2579 * Analyze the LCP Configure-NAK option list, and adjust our
2583 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
2590 buf = kmalloc (len, M_TEMP, M_INTWAIT);
2593 log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
2597 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2598 /* Sanity check option length */
2601 * Malicious option - drop immediately.
2602 * XXX Maybe we should just RXJ it?
2604 log(-1, "%s: received malicious LCP option, "
2605 "dropping.\n", ifp->if_xname);
2609 log(-1, " %s ", sppp_lcp_opt_name(*p));
2612 /* Magic number -- renegotiate */
2613 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
2614 len >= 6 && p[1] == 6) {
2615 magic = (u_long)p[2] << 24 |
2616 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2618 * If the remote magic is our negated one,
2619 * this looks like a loopback problem.
2620 * Suggest a new magic to make sure.
2622 if (magic == ~sp->lcp.magic) {
2624 log(-1, "magic glitch ");
2625 #if defined(__DragonFly__)
2626 sp->lcp.magic = krandom();
2628 sp->lcp.magic = time.tv_sec + time.tv_usec;
2631 sp->lcp.magic = magic;
2633 log(-1, "%lu ", magic);
2639 * Peer wants to advise us to negotiate an MRU.
2640 * Agree on it if it's reasonable, or use
2641 * default otherwise.
2643 if (len >= 4 && p[1] == 4) {
2644 u_int mru = p[2] * 256 + p[3];
2646 log(-1, "%d ", mru);
2647 if (mru < PP_MTU || mru > PP_MAX_MRU)
2650 sp->lcp.opts |= (1 << LCP_OPT_MRU);
2653 case LCP_OPT_AUTH_PROTO:
2655 * Peer doesn't like our authentication method,
2659 log(-1, "[access denied]\n");
2667 kfree (buf, M_TEMP);
2672 sppp_lcp_tlu(struct sppp *sp)
2679 if (! (ifp->if_flags & IFF_UP) &&
2680 (ifp->if_flags & IFF_RUNNING)) {
2681 /* Coming out of loopback mode. */
2683 kprintf (SPP_FMT "up\n", SPP_ARGS(ifp));
2686 for (i = 0; i < IDX_COUNT; i++)
2687 if ((cps[i])->flags & CP_QUAL)
2690 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
2691 (sp->pp_flags & PP_NEEDAUTH) != 0)
2692 sp->pp_phase = PHASE_AUTHENTICATE;
2694 sp->pp_phase = PHASE_NETWORK;
2697 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2698 sppp_phase_name(sp->pp_phase));
2701 * Open all authentication protocols. This is even required
2702 * if we already proceeded to network phase, since it might be
2703 * that remote wants us to authenticate, so we might have to
2704 * send a PAP request. Undesired authentication protocols
2705 * don't do anything when they get an Open event.
2707 for (i = 0; i < IDX_COUNT; i++)
2708 if ((cps[i])->flags & CP_AUTH)
2711 if (sp->pp_phase == PHASE_NETWORK) {
2712 /* Notify all NCPs. */
2713 for (i = 0; i < IDX_COUNT; i++)
2714 if (((cps[i])->flags & CP_NCP) &&
2717 * Hack to administratively disable IPv6 if
2718 * not desired. Perhaps we should have another
2719 * flag for this, but right now, we can make
2720 * all struct cp's read/only.
2722 (cps[i] != &ipv6cp ||
2723 (sp->confflags & CONF_ENABLE_IPV6)))
2727 /* Send Up events to all started protos. */
2728 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2729 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0)
2732 /* notify low-level driver of state change */
2734 sp->pp_chg(sp, (int)sp->pp_phase);
2736 if (sp->pp_phase == PHASE_NETWORK)
2737 /* if no NCP is starting, close down */
2738 sppp_lcp_check_and_close(sp);
2742 sppp_lcp_tld(struct sppp *sp)
2748 sp->pp_phase = PHASE_TERMINATE;
2751 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2752 sppp_phase_name(sp->pp_phase));
2755 * Take upper layers down. We send the Down event first and
2756 * the Close second to prevent the upper layers from sending
2757 * ``a flurry of terminate-request packets'', as the RFC
2760 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2761 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) {
2763 (cps[i])->Close(sp);
2768 sppp_lcp_tls(struct sppp *sp)
2772 sp->pp_phase = PHASE_ESTABLISH;
2775 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2776 sppp_phase_name(sp->pp_phase));
2778 /* Notify lower layer if desired. */
2786 sppp_lcp_tlf(struct sppp *sp)
2790 sp->pp_phase = PHASE_DEAD;
2792 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2793 sppp_phase_name(sp->pp_phase));
2795 /* Notify lower layer if desired. */
2803 sppp_lcp_scr(struct sppp *sp)
2805 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
2809 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
2810 if (! sp->lcp.magic)
2811 #if defined(__DragonFly__)
2812 sp->lcp.magic = krandom();
2814 sp->lcp.magic = time.tv_sec + time.tv_usec;
2816 opt[i++] = LCP_OPT_MAGIC;
2818 opt[i++] = sp->lcp.magic >> 24;
2819 opt[i++] = sp->lcp.magic >> 16;
2820 opt[i++] = sp->lcp.magic >> 8;
2821 opt[i++] = sp->lcp.magic;
2824 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
2825 opt[i++] = LCP_OPT_MRU;
2827 opt[i++] = sp->lcp.mru >> 8;
2828 opt[i++] = sp->lcp.mru;
2831 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
2832 authproto = sp->hisauth.proto;
2833 opt[i++] = LCP_OPT_AUTH_PROTO;
2834 opt[i++] = authproto == PPP_CHAP? 5: 4;
2835 opt[i++] = authproto >> 8;
2836 opt[i++] = authproto;
2837 if (authproto == PPP_CHAP)
2838 opt[i++] = CHAP_MD5;
2841 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP];
2842 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
2846 * Check the open NCPs, return true if at least one NCP is open.
2849 sppp_ncp_check(struct sppp *sp)
2853 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2854 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP)
2860 * Re-check the open NCPs and see if we should terminate the link.
2861 * Called by the NCPs during their tlf action handling.
2864 sppp_lcp_check_and_close(struct sppp *sp)
2867 if (sp->pp_phase < PHASE_NETWORK)
2868 /* don't bother, we are already going down */
2871 if (sppp_ncp_check(sp))
2878 *--------------------------------------------------------------------------*
2880 * The IPCP implementation. *
2882 *--------------------------------------------------------------------------*
2886 sppp_ipcp_init(struct sppp *sp)
2890 sp->state[IDX_IPCP] = STATE_INITIAL;
2891 sp->fail_counter[IDX_IPCP] = 0;
2892 sp->pp_seq[IDX_IPCP] = 0;
2893 sp->pp_rseq[IDX_IPCP] = 0;
2894 #if defined(__DragonFly__)
2895 callout_init(&sp->timeout[IDX_IPCP]);
2900 sppp_ipcp_up(struct sppp *sp)
2902 sppp_up_event(&ipcp, sp);
2906 sppp_ipcp_down(struct sppp *sp)
2908 sppp_down_event(&ipcp, sp);
2912 sppp_ipcp_open(struct sppp *sp)
2915 u_long myaddr, hisaddr;
2917 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN | IPCP_MYADDR_SEEN |
2918 IPCP_MYADDR_DYN | IPCP_VJ);
2921 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
2923 * If we don't have his address, this probably means our
2924 * interface doesn't want to talk IP at all. (This could
2925 * be the case if somebody wants to speak only IPX, for
2926 * example.) Don't open IPCP in this case.
2928 if (hisaddr == 0L) {
2929 /* XXX this message should go away */
2931 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
2937 * I don't have an assigned address, so i need to
2938 * negotiate my address.
2940 sp->ipcp.flags |= IPCP_MYADDR_DYN;
2941 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
2943 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
2944 if (sp->confflags & CONF_ENABLE_VJ) {
2945 sp->ipcp.opts |= (1 << IPCP_OPT_COMPRESSION);
2946 sp->ipcp.max_state = MAX_STATES - 1;
2947 sp->ipcp.compress_cid = 1;
2949 sppp_open_event(&ipcp, sp);
2953 sppp_ipcp_close(struct sppp *sp)
2955 sppp_close_event(&ipcp, sp);
2956 if (sp->ipcp.flags & IPCP_MYADDR_DYN)
2958 * My address was dynamic, clear it again.
2960 sppp_set_ip_addr(sp, 0L);
2964 sppp_ipcp_TO(void *cookie)
2966 sppp_to_event(&ipcp, (struct sppp *)cookie);
2970 * Analyze a configure request. Return true if it was agreeable, and
2971 * caused action sca, false if it has been rejected or nak'ed, and
2972 * caused action scn. (The return value is used to make the state
2973 * transition decision in the state automaton.)
2976 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2978 u_char *buf, *r, *p;
2979 struct ifnet *ifp = &sp->pp_if;
2980 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
2981 u_long hisaddr, desiredaddr;
2988 * Make sure to allocate a buf that can at least hold a
2989 * conf-nak with an `address' option. We might need it below.
2991 buf = r = kmalloc ((len < 6? 6: len), M_TEMP, M_INTWAIT);
2993 /* pass 1: see if we can recognize them */
2995 log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
2998 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2999 /* Sanity check option length */
3001 /* XXX should we just RXJ? */
3002 log(-1, "%s: malicious IPCP option received, dropping\n",
3007 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3009 case IPCP_OPT_COMPRESSION:
3010 if (!(sp->confflags & CONF_ENABLE_VJ)) {
3011 /* VJ compression administratively disabled */
3013 log(-1, "[locally disabled] ");
3017 * In theory, we should only conf-rej an
3018 * option that is shorter than RFC 1618
3019 * requires (i.e. < 4), and should conf-nak
3020 * anything else that is not VJ. However,
3021 * since our algorithm always uses the
3022 * original option to NAK it with new values,
3023 * things would become more complicated. In
3024 * pratice, the only commonly implemented IP
3025 * compression option is VJ anyway, so the
3026 * difference is negligible.
3028 if (len >= 6 && p[1] == 6) {
3030 * correctly formed compression option
3031 * that could be VJ compression
3036 log(-1, "optlen %d [invalid/unsupported] ",
3039 case IPCP_OPT_ADDRESS:
3040 if (len >= 6 && p[1] == 6) {
3041 /* correctly formed address option */
3045 log(-1, "[invalid] ");
3048 /* Others not supported. */
3053 /* Add the option to rejected list. */
3060 log(-1, " send conf-rej\n");
3061 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
3066 /* pass 2: parse option values */
3067 sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
3069 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
3073 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3075 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3077 case IPCP_OPT_COMPRESSION:
3078 desiredcomp = p[2] << 8 | p[3];
3079 /* We only support VJ */
3080 if (desiredcomp == IPCP_COMP_VJ) {
3082 log(-1, "VJ [ack] ");
3083 sp->ipcp.flags |= IPCP_VJ;
3084 sl_compress_init(sp->pp_comp, p[4]);
3085 sp->ipcp.max_state = p[4];
3086 sp->ipcp.compress_cid = p[5];
3090 log(-1, "compproto %#04x [not supported] ",
3092 p[2] = IPCP_COMP_VJ >> 8;
3093 p[3] = IPCP_COMP_VJ;
3094 p[4] = sp->ipcp.max_state;
3095 p[5] = sp->ipcp.compress_cid;
3097 case IPCP_OPT_ADDRESS:
3098 /* This is the address he wants in his end */
3099 desiredaddr = p[2] << 24 | p[3] << 16 |
3101 if (desiredaddr == hisaddr ||
3102 (hisaddr >= 1 && hisaddr <= 254 && desiredaddr != 0)) {
3104 * Peer's address is same as our value,
3105 * or we have set it to 0.0.0.* to
3106 * indicate that we do not really care,
3107 * this is agreeable. Gonna conf-ack
3111 log(-1, "%s [ack] ",
3112 sppp_dotted_quad(hisaddr));
3113 /* record that we've seen it already */
3114 sp->ipcp.flags |= IPCP_HISADDR_SEEN;
3118 * The address wasn't agreeable. This is either
3119 * he sent us 0.0.0.0, asking to assign him an
3120 * address, or he send us another address not
3121 * matching our value. Either case, we gonna
3122 * conf-nak it with our value.
3123 * XXX: we should "rej" if hisaddr == 0
3126 if (desiredaddr == 0)
3127 log(-1, "[addr requested] ");
3129 log(-1, "%s [not agreed] ",
3130 sppp_dotted_quad(desiredaddr));
3133 p[2] = hisaddr >> 24;
3134 p[3] = hisaddr >> 16;
3135 p[4] = hisaddr >> 8;
3139 /* Add the option to nak'ed list. */
3146 * If we are about to conf-ack the request, but haven't seen
3147 * his address so far, gonna conf-nak it instead, with the
3148 * `address' option present and our idea of his address being
3149 * filled in there, to request negotiation of both addresses.
3151 * XXX This can result in an endless req - nak loop if peer
3152 * doesn't want to send us his address. Q: What should we do
3153 * about it? XXX A: implement the max-failure counter.
3155 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
3156 buf[0] = IPCP_OPT_ADDRESS;
3158 buf[2] = hisaddr >> 24;
3159 buf[3] = hisaddr >> 16;
3160 buf[4] = hisaddr >> 8;
3164 log(-1, "still need hisaddr ");
3169 log(-1, " send conf-nak\n");
3170 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
3173 log(-1, " send conf-ack\n");
3174 sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
3175 h->ident, origlen, h+1);
3178 kfree (buf, M_TEMP);
3187 * Analyze the IPCP Configure-Reject option list, and adjust our
3191 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3194 struct ifnet *ifp = &sp->pp_if;
3195 int debug = ifp->if_flags & IFF_DEBUG;
3198 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3201 log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
3205 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3206 /* Sanity check option length */
3208 /* XXX should we just RXJ? */
3209 log(-1, "%s: malicious IPCP option received, dropping\n",
3214 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3216 case IPCP_OPT_COMPRESSION:
3217 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESSION);
3219 case IPCP_OPT_ADDRESS:
3221 * Peer doesn't grok address option. This is
3222 * bad. XXX Should we better give up here?
3223 * XXX We could try old "addresses" option...
3225 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
3232 kfree (buf, M_TEMP);
3237 * Analyze the IPCP Configure-NAK option list, and adjust our
3241 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3244 struct ifnet *ifp = &sp->pp_if;
3245 int debug = ifp->if_flags & IFF_DEBUG;
3250 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3253 log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
3257 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3258 /* Sanity check option length */
3260 /* XXX should we just RXJ? */
3261 log(-1, "%s: malicious IPCP option received, dropping\n",
3266 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3268 case IPCP_OPT_COMPRESSION:
3269 if (len >= 6 && p[1] == 6) {
3270 desiredcomp = p[2] << 8 | p[3];
3272 log(-1, "[wantcomp %#04x] ",
3274 if (desiredcomp == IPCP_COMP_VJ) {
3275 sl_compress_init(sp->pp_comp, p[4]);
3276 sp->ipcp.max_state = p[4];
3277 sp->ipcp.compress_cid = p[5];
3279 log(-1, "[agree] ");
3282 ~(1 << IPCP_OPT_COMPRESSION);
3285 case IPCP_OPT_ADDRESS:
3287 * Peer doesn't like our local IP address. See
3288 * if we can do something for him. We'll drop
3289 * him our address then.
3291 if (len >= 6 && p[1] == 6) {
3292 wantaddr = p[2] << 24 | p[3] << 16 |
3294 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
3296 log(-1, "[wantaddr %s] ",
3297 sppp_dotted_quad(wantaddr));
3299 * When doing dynamic address assignment,
3300 * we accept his offer. Otherwise, we
3301 * ignore it and thus continue to negotiate
3302 * our already existing value.
3303 * XXX: Bogus, if he said no once, he'll
3304 * just say no again, might as well die.
3306 if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
3307 sppp_set_ip_addr(sp, wantaddr);
3309 log(-1, "[agree] ");
3310 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
3318 kfree (buf, M_TEMP);
3323 sppp_ipcp_tlu(struct sppp *sp)
3325 /* we are up - notify isdn daemon */
3331 sppp_ipcp_tld(struct sppp *sp)
3336 sppp_ipcp_tls(struct sppp *sp)
3338 /* indicate to LCP that it must stay alive */
3339 sp->lcp.protos |= (1 << IDX_IPCP);
3343 sppp_ipcp_tlf(struct sppp *sp)
3345 /* we no longer need LCP */
3346 sp->lcp.protos &= ~(1 << IDX_IPCP);
3347 sppp_lcp_check_and_close(sp);
3351 sppp_ipcp_scr(struct sppp *sp)
3353 char opt[6 /* compression */ + 6 /* address */];
3357 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
3358 opt[i++] = IPCP_OPT_COMPRESSION;
3360 opt[i++] = IPCP_COMP_VJ >> 8;
3361 opt[i++] = IPCP_COMP_VJ;
3362 opt[i++] = sp->ipcp.max_state;
3363 opt[i++] = sp->ipcp.compress_cid;
3365 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
3366 sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
3367 opt[i++] = IPCP_OPT_ADDRESS;
3369 opt[i++] = ouraddr >> 24;
3370 opt[i++] = ouraddr >> 16;
3371 opt[i++] = ouraddr >> 8;
3375 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP];
3376 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
3380 *--------------------------------------------------------------------------*
3382 * The IPv6CP implementation. *
3384 *--------------------------------------------------------------------------*
3389 sppp_ipv6cp_init(struct sppp *sp)
3391 sp->ipv6cp.opts = 0;
3392 sp->ipv6cp.flags = 0;
3393 sp->state[IDX_IPV6CP] = STATE_INITIAL;
3394 sp->fail_counter[IDX_IPV6CP] = 0;
3395 sp->pp_seq[IDX_IPV6CP] = 0;
3396 sp->pp_rseq[IDX_IPV6CP] = 0;
3397 #if defined(__NetBSD__)
3398 callout_init(&sp->ch[IDX_IPV6CP]);
3400 #if defined(__DragonFly__)
3401 callout_init(&sp->timeout[IDX_IPV6CP]);
3406 sppp_ipv6cp_up(struct sppp *sp)
3408 sppp_up_event(&ipv6cp, sp);
3412 sppp_ipv6cp_down(struct sppp *sp)
3414 sppp_down_event(&ipv6cp, sp);
3418 sppp_ipv6cp_open(struct sppp *sp)
3421 struct in6_addr myaddr, hisaddr;
3423 #ifdef IPV6CP_MYIFID_DYN
3424 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN);
3426 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN;
3429 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0);
3431 * If we don't have our address, this probably means our
3432 * interface doesn't want to talk IPv6 at all. (This could
3433 * be the case if somebody wants to speak only IPX, for
3434 * example.) Don't open IPv6CP in this case.
3436 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) {
3437 /* XXX this message should go away */
3439 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n",
3444 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3445 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3446 sppp_open_event(&ipv6cp, sp);
3450 sppp_ipv6cp_close(struct sppp *sp)
3452 sppp_close_event(&ipv6cp, sp);
3456 sppp_ipv6cp_TO(void *cookie)
3458 sppp_to_event(&ipv6cp, (struct sppp *)cookie);
3462 * Analyze a configure request. Return true if it was agreeable, and
3463 * caused action sca, false if it has been rejected or nak'ed, and
3464 * caused action scn. (The return value is used to make the state
3465 * transition decision in the state automaton.)
3468 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3470 u_char *buf, *r, *p;
3471 struct ifnet *ifp = &sp->pp_if;
3472 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
3473 struct in6_addr myaddr, desiredaddr, suggestaddr;
3476 int collision, nohisaddr;
3481 * Make sure to allocate a buf that can at least hold a
3482 * conf-nak with an `address' option. We might need it below.
3484 buf = r = kmalloc ((len < 6? 6: len), M_TEMP, M_INTWAIT);
3486 /* pass 1: see if we can recognize them */
3488 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:",
3492 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3493 /* Sanity check option length */
3496 log(-1, "%s: received malicious IPCPv6 option, "
3497 "dropping\n", ifp->if_xname);
3501 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3503 case IPV6CP_OPT_IFID:
3504 if (len >= 10 && p[1] == 10 && ifidcount == 0) {
3505 /* correctly formed address option */
3510 log(-1, " [invalid]");
3513 case IPV6CP_OPT_COMPRESSION:
3514 if (len >= 4 && p[1] >= 4) {
3515 /* correctly formed compress option */
3519 log(-1, " [invalid]");
3523 /* Others not supported. */
3528 /* Add the option to rejected list. */
3535 log(-1, " send conf-rej\n");
3536 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf);
3541 /* pass 2: parse option values */
3542 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
3544 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ",
3549 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3551 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3554 case IPV6CP_OPT_COMPRESSION:
3557 case IPV6CP_OPT_IFID:
3558 bzero(&desiredaddr, sizeof(desiredaddr));
3559 bcopy(&p[2], &desiredaddr.s6_addr[8], 8);
3560 collision = (bcmp(&desiredaddr.s6_addr[8],
3561 &myaddr.s6_addr[8], 8) == 0);
3562 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr);
3564 desiredaddr.s6_addr16[0] = htons(0xfe80);
3565 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index);
3567 if (!collision && !nohisaddr) {
3568 /* no collision, hisaddr known - Conf-Ack */
3573 ip6_sprintf(&desiredaddr),
3574 sppp_cp_type_name(type));
3579 bzero(&suggestaddr, sizeof(&suggestaddr));
3580 if (collision && nohisaddr) {
3581 /* collision, hisaddr unknown - Conf-Rej */
3586 * - no collision, hisaddr unknown, or
3587 * - collision, hisaddr known
3588 * Conf-Nak, suggest hisaddr
3591 sppp_suggest_ip6_addr(sp, &suggestaddr);
3592 bcopy(&suggestaddr.s6_addr[8], &p[2], 8);
3595 log(-1, " %s [%s]", ip6_sprintf(&desiredaddr),
3596 sppp_cp_type_name(type));
3599 /* Add the option to nak'ed list. */
3605 if (rlen == 0 && type == CONF_ACK) {
3607 log(-1, " send %s\n", sppp_cp_type_name(type));
3608 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1);
3611 if (type == CONF_ACK)
3612 panic("IPv6CP RCR: CONF_ACK with non-zero rlen");
3616 log(-1, " send %s suggest %s\n",
3617 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr));
3619 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf);
3623 kfree (buf, M_TEMP);
3632 * Analyze the IPv6CP Configure-Reject option list, and adjust our
3636 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3639 struct ifnet *ifp = &sp->pp_if;
3640 int debug = ifp->if_flags & IFF_DEBUG;
3643 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3646 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:",
3650 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3653 log(-1, "%s: received malicious IPCPv6 option, "
3654 "dropping\n", ifp->if_xname);
3658 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3660 case IPV6CP_OPT_IFID:
3662 * Peer doesn't grok address option. This is
3663 * bad. XXX Should we better give up here?
3665 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID);
3668 case IPV6CP_OPT_COMPRESS:
3669 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS);
3677 kfree (buf, M_TEMP);
3682 * Analyze the IPv6CP Configure-NAK option list, and adjust our
3686 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3689 struct ifnet *ifp = &sp->pp_if;
3690 int debug = ifp->if_flags & IFF_DEBUG;
3691 struct in6_addr suggestaddr;
3694 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3697 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:",
3701 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3704 log(-1, "%s: received malicious IPCPv6 option, "
3705 "dropping\n", ifp->if_xname);
3709 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3711 case IPV6CP_OPT_IFID:
3713 * Peer doesn't like our local ifid. See
3714 * if we can do something for him. We'll drop
3715 * him our address then.
3717 if (len < 10 || p[1] != 10)
3719 bzero(&suggestaddr, sizeof(suggestaddr));
3720 suggestaddr.s6_addr16[0] = htons(0xfe80);
3721 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index);
3722 bcopy(&p[2], &suggestaddr.s6_addr[8], 8);
3724 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3726 log(-1, " [suggestaddr %s]",
3727 ip6_sprintf(&suggestaddr));
3728 #ifdef IPV6CP_MYIFID_DYN
3730 * When doing dynamic address assignment,
3731 * we accept his offer.
3733 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) {
3734 struct in6_addr lastsuggest;
3736 * If <suggested myaddr from peer> equals to
3737 * <hisaddr we have suggested last time>,
3738 * we have a collision. generate new random
3741 sppp_suggest_ip6_addr(&lastsuggest);
3742 if (IN6_ARE_ADDR_EQUAL(&suggestaddr,
3745 log(-1, " [random]");
3746 sppp_gen_ip6_addr(sp, &suggestaddr);
3748 sppp_set_ip6_addr(sp, &suggestaddr, 0);
3750 log(-1, " [agree]");
3751 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3755 * Since we do not do dynamic address assignment,
3756 * we ignore it and thus continue to negotiate
3757 * our already existing value. This can possibly
3758 * go into infinite request-reject loop.
3760 * This is not likely because we normally use
3761 * ifid based on MAC-address.
3762 * If you have no ethernet card on the node, too bad.
3763 * XXX should we use fail_counter?
3768 case IPV6CP_OPT_COMPRESS:
3770 * Peer wants different compression parameters.
3779 kfree (buf, M_TEMP);
3783 sppp_ipv6cp_tlu(struct sppp *sp)
3785 /* we are up - notify isdn daemon */
3791 sppp_ipv6cp_tld(struct sppp *sp)
3796 sppp_ipv6cp_tls(struct sppp *sp)
3798 /* indicate to LCP that it must stay alive */
3799 sp->lcp.protos |= (1 << IDX_IPV6CP);
3803 sppp_ipv6cp_tlf(struct sppp *sp)
3806 #if 0 /* need #if 0 to close IPv6CP properly */
3807 /* we no longer need LCP */
3808 sp->lcp.protos &= ~(1 << IDX_IPV6CP);
3809 sppp_lcp_check_and_close(sp);
3814 sppp_ipv6cp_scr(struct sppp *sp)
3816 char opt[10 /* ifid */ + 4 /* compression, minimum */];
3817 struct in6_addr ouraddr;
3820 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) {
3821 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0);
3822 opt[i++] = IPV6CP_OPT_IFID;
3824 bcopy(&ouraddr.s6_addr[8], &opt[i], 8);
3829 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) {
3830 opt[i++] = IPV6CP_OPT_COMPRESSION;
3832 opt[i++] = 0; /* TBD */
3833 opt[i++] = 0; /* TBD */
3834 /* variable length data may follow */
3838 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP];
3839 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt);
3843 sppp_ipv6cp_init(struct sppp *sp)
3848 sppp_ipv6cp_up(struct sppp *sp)
3853 sppp_ipv6cp_down(struct sppp *sp)
3859 sppp_ipv6cp_open(struct sppp *sp)
3864 sppp_ipv6cp_close(struct sppp *sp)
3869 sppp_ipv6cp_TO(void *sp)
3874 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3880 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3885 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3890 sppp_ipv6cp_tlu(struct sppp *sp)
3895 sppp_ipv6cp_tld(struct sppp *sp)
3900 sppp_ipv6cp_tls(struct sppp *sp)
3905 sppp_ipv6cp_tlf(struct sppp *sp)
3910 sppp_ipv6cp_scr(struct sppp *sp)
3916 *--------------------------------------------------------------------------*
3918 * The CHAP implementation. *
3920 *--------------------------------------------------------------------------*
3924 * The authentication protocols don't employ a full-fledged state machine as
3925 * the control protocols do, since they do have Open and Close events, but
3926 * not Up and Down, nor are they explicitly terminated. Also, use of the
3927 * authentication protocols may be different in both directions (this makes
3928 * sense, think of a machine that never accepts incoming calls but only
3929 * calls out, it doesn't require the called party to authenticate itself).
3931 * Our state machine for the local authentication protocol (we are requesting
3932 * the peer to authenticate) looks like:
3935 * +--------------------------------------------+
3937 * +--------+ Close +---------+ RCA+
3938 * | |<----------------------------------| |------+
3939 * +--->| Closed | TO* | Opened | sca |
3940 * | | |-----+ +-------| |<-----+
3941 * | +--------+ irc | | +---------+
3947 * | | +------->+ | |
3949 * | +--------+ V | |
3950 * | | |<----+<--------------------+ |
3956 * +------+ +------------------------------------------+
3957 * scn,tld sca,irc,ict,tlu
3962 * Open: LCP reached authentication phase
3963 * Close: LCP reached terminate phase
3965 * RCA+: received reply (pap-req, chap-response), acceptable
3966 * RCN: received reply (pap-req, chap-response), not acceptable
3967 * TO+: timeout with restart counter >= 0
3968 * TO-: timeout with restart counter < 0
3969 * TO*: reschedule timeout for CHAP
3971 * scr: send request packet (none for PAP, chap-challenge)
3972 * sca: send ack packet (pap-ack, chap-success)
3973 * scn: send nak packet (pap-nak, chap-failure)
3974 * ict: initialize re-challenge timer (CHAP only)
3976 * tlu: this-layer-up, LCP reaches network phase
3977 * tld: this-layer-down, LCP enters terminate phase
3979 * Note that in CHAP mode, after sending a new challenge, while the state
3980 * automaton falls back into Req-Sent state, it doesn't signal a tld
3981 * event to LCP, so LCP remains in network phase. Only after not getting
3982 * any response (or after getting an unacceptable response), CHAP closes,
3983 * causing LCP to enter terminate phase.
3985 * With PAP, there is no initial request that can be sent. The peer is
3986 * expected to send one based on the successful negotiation of PAP as
3987 * the authentication protocol during the LCP option negotiation.
3989 * Incoming authentication protocol requests (remote requests
3990 * authentication, we are peer) don't employ a state machine at all,
3991 * they are simply answered. Some peers [Ascend P50 firmware rev
3992 * 4.50] react allergically when sending IPCP requests while they are
3993 * still in authentication phase (thereby violating the standard that
3994 * demands that these NCP packets are to be discarded), so we keep
3995 * track of the peer demanding us to authenticate, and only proceed to
3996 * phase network once we've seen a positive acknowledge for the
4001 * Handle incoming CHAP packets.
4004 sppp_chap_input(struct sppp *sp, struct mbuf *m)
4007 struct lcp_header *h;
4009 u_char *value, *name, digest[AUTHKEYLEN], dsize;
4010 int value_len, name_len;
4013 len = m->m_pkthdr.len;
4017 SPP_FMT "chap invalid packet length: %d bytes\n",
4018 SPP_ARGS(ifp), len);
4021 h = mtod (m, struct lcp_header*);
4022 if (len > ntohs (h->len))
4023 len = ntohs (h->len);
4026 /* challenge, failure and success are his authproto */
4027 case CHAP_CHALLENGE:
4028 value = 1 + (u_char*)(h+1);
4029 value_len = value[-1];
4030 name = value + value_len;
4031 name_len = len - value_len - 5;
4035 SPP_FMT "chap corrupted challenge "
4036 "<%s id=0x%x len=%d",
4038 sppp_auth_type_name(PPP_CHAP, h->type),
4039 h->ident, ntohs(h->len));
4040 sppp_print_bytes((u_char*) (h+1), len-4);
4048 SPP_FMT "chap input <%s id=0x%x len=%d name=",
4050 sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
4052 sppp_print_string((char*) name, name_len);
4053 log(-1, " value-size=%d value=", value_len);
4054 sppp_print_bytes(value, value_len);
4058 /* Compute reply value. */
4060 MD5Update(&ctx, &h->ident, 1);
4061 MD5Update(&ctx, sp->myauth.secret,
4062 sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
4063 MD5Update(&ctx, value, value_len);
4064 MD5Final(digest, &ctx);
4065 dsize = sizeof digest;
4067 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
4068 sizeof dsize, (const char *)&dsize,
4069 sizeof digest, digest,
4070 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4077 log(LOG_DEBUG, SPP_FMT "chap success",
4081 sppp_print_string((char*)(h + 1), len - 4);
4088 sp->pp_flags &= ~PP_NEEDAUTH;
4089 if (sp->myauth.proto == PPP_CHAP &&
4090 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4091 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
4093 * We are authenticator for CHAP but didn't
4094 * complete yet. Leave it to tlu to proceed
4101 sppp_phase_network(sp);
4106 log(LOG_INFO, SPP_FMT "chap failure",
4110 sppp_print_string((char*)(h + 1), len - 4);
4114 log(LOG_INFO, SPP_FMT "chap failure\n",
4116 /* await LCP shutdown by authenticator */
4119 /* response is my authproto */
4121 value = 1 + (u_char*)(h+1);
4122 value_len = value[-1];
4123 name = value + value_len;
4124 name_len = len - value_len - 5;
4128 SPP_FMT "chap corrupted response "
4129 "<%s id=0x%x len=%d",
4131 sppp_auth_type_name(PPP_CHAP, h->type),
4132 h->ident, ntohs(h->len));
4133 sppp_print_bytes((u_char*)(h+1), len-4);
4138 if (h->ident != sp->confid[IDX_CHAP]) {
4141 SPP_FMT "chap dropping response for old ID "
4142 "(got %d, expected %d)\n",
4144 h->ident, sp->confid[IDX_CHAP]);
4147 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
4148 || bcmp(name, sp->hisauth.name, name_len) != 0) {
4149 log(LOG_INFO, SPP_FMT "chap response, his name ",
4151 sppp_print_string(name, name_len);
4152 log(-1, " != expected ");
4153 sppp_print_string(sp->hisauth.name,
4154 sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
4158 log(LOG_DEBUG, SPP_FMT "chap input(%s) "
4159 "<%s id=0x%x len=%d name=",
4161 sppp_state_name(sp->state[IDX_CHAP]),
4162 sppp_auth_type_name(PPP_CHAP, h->type),
4163 h->ident, ntohs (h->len));
4164 sppp_print_string((char*)name, name_len);
4165 log(-1, " value-size=%d value=", value_len);
4166 sppp_print_bytes(value, value_len);
4169 if (value_len != AUTHKEYLEN) {
4172 SPP_FMT "chap bad hash value length: "
4173 "%d bytes, should be %d\n",
4174 SPP_ARGS(ifp), value_len,
4180 MD5Update(&ctx, &h->ident, 1);
4181 MD5Update(&ctx, sp->hisauth.secret,
4182 sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
4183 MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
4184 MD5Final(digest, &ctx);
4186 #define FAILMSG "Failed..."
4187 #define SUCCMSG "Welcome!"
4189 if (value_len != sizeof digest ||
4190 bcmp(digest, value, value_len) != 0) {
4191 /* action scn, tld */
4192 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
4193 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4198 /* action sca, perhaps tlu */
4199 if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
4200 sp->state[IDX_CHAP] == STATE_OPENED)
4201 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
4202 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4204 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
4205 sppp_cp_change_state(&chap, sp, STATE_OPENED);
4211 /* Unknown CHAP packet type -- ignore. */
4213 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
4214 "<0x%x id=0x%xh len=%d",
4216 sppp_state_name(sp->state[IDX_CHAP]),
4217 h->type, h->ident, ntohs(h->len));
4218 sppp_print_bytes((u_char*)(h+1), len-4);
4227 sppp_chap_init(struct sppp *sp)
4229 /* Chap doesn't have STATE_INITIAL at all. */
4230 sp->state[IDX_CHAP] = STATE_CLOSED;
4231 sp->fail_counter[IDX_CHAP] = 0;
4232 sp->pp_seq[IDX_CHAP] = 0;
4233 sp->pp_rseq[IDX_CHAP] = 0;
4234 #if defined(__DragonFly__)
4235 callout_init(&sp->timeout[IDX_CHAP]);
4240 sppp_chap_open(struct sppp *sp)
4242 if (sp->myauth.proto == PPP_CHAP &&
4243 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4244 /* we are authenticator for CHAP, start it */
4246 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4247 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4249 /* nothing to be done if we are peer, await a challenge */
4253 sppp_chap_close(struct sppp *sp)
4255 if (sp->state[IDX_CHAP] != STATE_CLOSED)
4256 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4260 sppp_chap_TO(void *cookie)
4262 struct sppp *sp = (struct sppp *)cookie;
4268 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
4270 sppp_state_name(sp->state[IDX_CHAP]),
4271 sp->rst_counter[IDX_CHAP]);
4273 if (--sp->rst_counter[IDX_CHAP] < 0)
4275 switch (sp->state[IDX_CHAP]) {
4276 case STATE_REQ_SENT:
4278 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4282 /* TO+ (or TO*) event */
4283 switch (sp->state[IDX_CHAP]) {
4286 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4288 case STATE_REQ_SENT:
4290 /* sppp_cp_change_state() will restart the timer */
4291 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4299 sppp_chap_tlu(struct sppp *sp)
4305 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4308 * Some broken CHAP implementations (Conware CoNet, firmware
4309 * 4.0.?) don't want to re-authenticate their CHAP once the
4310 * initial challenge-response exchange has taken place.
4311 * Provide for an option to avoid rechallenges.
4313 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
4315 * Compute the re-challenge timeout. This will yield
4316 * a number between 300 and 810 seconds.
4318 i = 300 + ((unsigned)(krandom() & 0xff00) >> 7);
4319 callout_reset(&sp->timeout[IDX_CHAP], i * hz, chap.TO, sp);
4324 SPP_FMT "chap %s, ",
4326 sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
4327 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
4328 log(-1, "next re-challenge in %d seconds\n", i);
4330 log(-1, "re-challenging suppressed\n");
4335 /* indicate to LCP that we need to be closed down */
4336 sp->lcp.protos |= (1 << IDX_CHAP);
4338 if (sp->pp_flags & PP_NEEDAUTH) {
4340 * Remote is authenticator, but his auth proto didn't
4341 * complete yet. Defer the transition to network
4351 * If we are already in phase network, we are done here. This
4352 * is the case if this is a dummy tlu event after a re-challenge.
4354 if (sp->pp_phase != PHASE_NETWORK)
4355 sppp_phase_network(sp);
4359 sppp_chap_tld(struct sppp *sp)
4364 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
4365 callout_stop(&sp->timeout[IDX_CHAP]);
4366 sp->lcp.protos &= ~(1 << IDX_CHAP);
4372 sppp_chap_scr(struct sppp *sp)
4377 /* Compute random challenge. */
4378 ch = (u_long *)sp->myauth.challenge;
4379 #if defined(__DragonFly__)
4380 read_random(&seed, sizeof seed);
4385 seed = tv.tv_sec ^ tv.tv_usec;
4388 ch[0] = seed ^ krandom();
4389 ch[1] = seed ^ krandom();
4390 ch[2] = seed ^ krandom();
4391 ch[3] = seed ^ krandom();
4394 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP];
4396 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
4397 sizeof clen, (const char *)&clen,
4398 (size_t)AUTHKEYLEN, sp->myauth.challenge,
4399 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4405 *--------------------------------------------------------------------------*
4407 * The PAP implementation. *
4409 *--------------------------------------------------------------------------*
4412 * For PAP, we need to keep a little state also if we are the peer, not the
4413 * authenticator. This is since we don't get a request to authenticate, but
4414 * have to repeatedly authenticate ourself until we got a response (or the
4415 * retry counter is expired).
4419 * Handle incoming PAP packets. */
4421 sppp_pap_input(struct sppp *sp, struct mbuf *m)
4424 struct lcp_header *h;
4426 u_char *name, *passwd, mlen;
4427 int name_len, passwd_len;
4430 * Malicious input might leave this uninitialized, so
4431 * init to an impossible value.
4435 len = m->m_pkthdr.len;
4439 SPP_FMT "pap invalid packet length: %d bytes\n",
4440 SPP_ARGS(ifp), len);
4443 h = mtod (m, struct lcp_header*);
4444 if (len > ntohs (h->len))
4445 len = ntohs (h->len);
4447 /* PAP request is my authproto */
4449 name = 1 + (u_char*)(h+1);
4450 name_len = name[-1];
4451 passwd = name + name_len + 1;
4452 if (name_len > len - 6 ||
4453 (passwd_len = passwd[-1]) > len - 6 - name_len) {
4455 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4456 "<%s id=0x%x len=%d",
4458 sppp_auth_type_name(PPP_PAP, h->type),
4459 h->ident, ntohs(h->len));
4460 sppp_print_bytes((u_char*)(h+1), len-4);
4466 log(LOG_DEBUG, SPP_FMT "pap input(%s) "
4467 "<%s id=0x%x len=%d name=",
4469 sppp_state_name(sp->state[IDX_PAP]),
4470 sppp_auth_type_name(PPP_PAP, h->type),
4471 h->ident, ntohs(h->len));
4472 sppp_print_string((char*)name, name_len);
4473 log(-1, " passwd=");
4474 sppp_print_string((char*)passwd, passwd_len);
4477 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) ||
4478 passwd_len != sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN) ||
4479 bcmp(name, sp->hisauth.name, name_len) != 0 ||
4480 bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
4481 /* action scn, tld */
4482 mlen = sizeof(FAILMSG) - 1;
4483 sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
4484 sizeof mlen, (const char *)&mlen,
4485 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4490 /* action sca, perhaps tlu */
4491 if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
4492 sp->state[IDX_PAP] == STATE_OPENED) {
4493 mlen = sizeof(SUCCMSG) - 1;
4494 sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
4495 sizeof mlen, (const char *)&mlen,
4496 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4499 if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
4500 sppp_cp_change_state(&pap, sp, STATE_OPENED);
4505 /* ack and nak are his authproto */
4507 callout_stop(&sp->pap_my_to);
4509 log(LOG_DEBUG, SPP_FMT "pap success",
4511 name = 1 + (u_char *)(h + 1);
4512 name_len = name[-1];
4513 if (len > 5 && name_len < len+4) {
4515 sppp_print_string(name, name_len);
4522 sp->pp_flags &= ~PP_NEEDAUTH;
4523 if (sp->myauth.proto == PPP_PAP &&
4524 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4525 (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
4527 * We are authenticator for PAP but didn't
4528 * complete yet. Leave it to tlu to proceed
4539 sppp_phase_network(sp);
4543 callout_stop(&sp->pap_my_to);
4545 log(LOG_INFO, SPP_FMT "pap failure",
4547 name = 1 + (u_char *)(h + 1);
4548 name_len = name[-1];
4549 if (len > 5 && name_len < len+4) {
4551 sppp_print_string(name, name_len);
4555 log(LOG_INFO, SPP_FMT "pap failure\n",
4557 /* await LCP shutdown by authenticator */
4561 /* Unknown PAP packet type -- ignore. */
4563 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4564 "<0x%x id=0x%x len=%d",
4566 h->type, h->ident, ntohs(h->len));
4567 sppp_print_bytes((u_char*)(h+1), len-4);
4576 sppp_pap_init(struct sppp *sp)
4578 /* PAP doesn't have STATE_INITIAL at all. */
4579 sp->state[IDX_PAP] = STATE_CLOSED;
4580 sp->fail_counter[IDX_PAP] = 0;
4581 sp->pp_seq[IDX_PAP] = 0;
4582 sp->pp_rseq[IDX_PAP] = 0;
4583 #if defined(__DragonFly__)
4584 callout_init(&sp->timeout[IDX_PAP]);
4585 callout_init(&sp->pap_my_to);
4590 sppp_pap_open(struct sppp *sp)
4592 if (sp->hisauth.proto == PPP_PAP &&
4593 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4594 /* we are authenticator for PAP, start our timer */
4595 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4596 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4598 if (sp->myauth.proto == PPP_PAP) {
4599 /* we are peer, send a request, and start a timer */
4601 callout_reset(&sp->pap_my_to, sp->lcp.timeout,
4602 sppp_pap_my_TO, sp);
4607 sppp_pap_close(struct sppp *sp)
4609 if (sp->state[IDX_PAP] != STATE_CLOSED)
4610 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4614 * That's the timeout routine if we are authenticator. Since the
4615 * authenticator is basically passive in PAP, we can't do much here.
4618 sppp_pap_TO(void *cookie)
4620 struct sppp *sp = (struct sppp *)cookie;
4626 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
4628 sppp_state_name(sp->state[IDX_PAP]),
4629 sp->rst_counter[IDX_PAP]);
4631 if (--sp->rst_counter[IDX_PAP] < 0)
4633 switch (sp->state[IDX_PAP]) {
4634 case STATE_REQ_SENT:
4636 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4640 /* TO+ event, not very much we could do */
4641 switch (sp->state[IDX_PAP]) {
4642 case STATE_REQ_SENT:
4643 /* sppp_cp_change_state() will restart the timer */
4644 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4652 * That's the timeout handler if we are peer. Since the peer is active,
4653 * we need to retransmit our PAP request since it is apparently lost.
4654 * XXX We should impose a max counter.
4657 sppp_pap_my_TO(void *cookie)
4659 struct sppp *sp = (struct sppp *)cookie;
4663 log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
4670 sppp_pap_tlu(struct sppp *sp)
4674 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4677 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
4678 SPP_ARGS(ifp), pap.name);
4682 /* indicate to LCP that we need to be closed down */
4683 sp->lcp.protos |= (1 << IDX_PAP);
4685 if (sp->pp_flags & PP_NEEDAUTH) {
4687 * Remote is authenticator, but his auth proto didn't
4688 * complete yet. Defer the transition to network
4695 sppp_phase_network(sp);
4699 sppp_pap_tld(struct sppp *sp)
4704 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
4705 callout_stop(&sp->timeout[IDX_PAP]);
4706 callout_stop(&sp->pap_my_to);
4707 sp->lcp.protos &= ~(1 << IDX_PAP);
4713 sppp_pap_scr(struct sppp *sp)
4715 u_char idlen, pwdlen;
4717 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP];
4718 pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
4719 idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
4721 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
4722 sizeof idlen, (const char *)&idlen,
4723 (size_t)idlen, sp->myauth.name,
4724 sizeof pwdlen, (const char *)&pwdlen,
4725 (size_t)pwdlen, sp->myauth.secret,
4730 * Random miscellaneous functions.
4734 * Send a PAP or CHAP proto packet.
4736 * Varadic function, each of the elements for the ellipsis is of type
4737 * ``size_t mlen, const u_char *msg''. Processing will stop iff
4739 * NOTE: never declare variadic functions with types subject to type
4740 * promotion (i.e. u_char). This is asking for big trouble depending
4741 * on the architecture you are on...
4745 sppp_auth_send(const struct cp *cp, struct sppp *sp,
4746 unsigned int type, unsigned int id,
4750 struct ppp_header *h;
4751 struct lcp_header *lh;
4759 MGETHDR (m, MB_DONTWAIT, MT_DATA);
4762 m->m_pkthdr.rcvif = 0;
4764 h = mtod (m, struct ppp_header*);
4765 h->address = PPP_ALLSTATIONS; /* broadcast address */
4766 h->control = PPP_UI; /* Unnumbered Info */
4767 h->protocol = htons(cp->proto);
4769 lh = (struct lcp_header*)(h + 1);
4772 p = (u_char*) (lh+1);
4777 while ((mlen = (unsigned int)__va_arg(ap, size_t)) != 0) {
4778 msg = __va_arg(ap, const char *);
4780 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
4786 bcopy(msg, p, mlen);
4791 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
4792 lh->len = htons (LCP_HEADER_LEN + len);
4795 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
4796 SPP_ARGS(ifp), cp->name,
4797 sppp_auth_type_name(cp->proto, lh->type),
4798 lh->ident, ntohs(lh->len));
4799 sppp_print_bytes((u_char*) (lh+1), len);
4802 if (IF_QFULL (&sp->pp_cpq)) {
4803 IF_DROP (&sp->pp_fastq);
4804 IF_DROP (&ifp->if_snd);
4808 IF_ENQUEUE (&sp->pp_cpq, m);
4809 if (! (ifp->if_flags & IFF_OACTIVE))
4810 (*ifp->if_start) (ifp);
4811 ifp->if_obytes += m->m_pkthdr.len + 3;
4815 * Send keepalive packets, every 10 seconds.
4818 sppp_keepalive(void *dummy)
4824 for (sp=spppq; sp; sp=sp->pp_next) {
4825 struct ifnet *ifp = &sp->pp_if;
4827 /* Keepalive mode disabled or channel down? */
4828 if (! (sp->pp_flags & PP_KEEPALIVE) ||
4829 ! (ifp->if_flags & IFF_RUNNING))
4832 /* No keepalive in PPP mode if LCP not opened yet. */
4833 if (sp->pp_mode != IFF_CISCO &&
4834 sp->pp_phase < PHASE_AUTHENTICATE)
4837 if (sp->pp_alivecnt == MAXALIVECNT) {
4838 /* No keepalive packets got. Stop the interface. */
4839 kprintf (SPP_FMT "down\n", SPP_ARGS(ifp));
4841 IF_DRAIN(&sp->pp_cpq);
4842 if (sp->pp_mode != IFF_CISCO) {
4844 /* Shut down the PPP link. */
4846 /* Initiate negotiation. XXX */
4850 ifnet_serialize_all(ifp);
4851 if (sp->pp_alivecnt <= MAXALIVECNT)
4853 if (sp->pp_mode == IFF_CISCO)
4854 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ,
4855 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]);
4856 else if (sp->pp_phase >= PHASE_AUTHENTICATE) {
4857 long nmagic = htonl (sp->lcp.magic);
4858 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP];
4859 sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
4860 sp->lcp.echoid, 4, &nmagic);
4862 ifnet_deserialize_all(ifp);
4864 callout_reset(&keepalive_timeout, hz * 10, sppp_keepalive, NULL);
4869 * Get both IP addresses.
4872 sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
4874 struct ifnet *ifp = &sp->pp_if;
4875 struct ifaddr_container *ifac;
4877 struct sockaddr_in *si, *sm;
4883 * Pick the first AF_INET address from the list,
4884 * aliases don't make any sense on a p2p link anyway.
4887 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
4889 if (ifa->ifa_addr->sa_family == AF_INET) {
4890 si = (struct sockaddr_in *)ifa->ifa_addr;
4891 sm = (struct sockaddr_in *)ifa->ifa_netmask;
4897 if (si && si->sin_addr.s_addr) {
4898 ssrc = si->sin_addr.s_addr;
4900 *srcmask = ntohl(sm->sin_addr.s_addr);
4903 si = (struct sockaddr_in *)ifa->ifa_dstaddr;
4904 if (si && si->sin_addr.s_addr)
4905 ddst = si->sin_addr.s_addr;
4908 if (dst) *dst = ntohl(ddst);
4909 if (src) *src = ntohl(ssrc);
4913 * Set my IP address. Must be called at splimp.
4916 sppp_set_ip_addr(struct sppp *sp, u_long src)
4919 struct ifaddr_container *ifac;
4920 struct ifaddr *ifa = NULL;
4921 struct sockaddr_in *si;
4922 struct in_ifaddr *ia;
4925 * Pick the first AF_INET address from the list,
4926 * aliases don't make any sense on a p2p link anyway.
4929 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
4931 if (ifa->ifa_addr->sa_family == AF_INET) {
4932 si = (struct sockaddr_in *)ifa->ifa_addr;
4938 if (ifac != NULL && si != NULL) {
4940 #if __NetBSD_Version__ >= 103080000
4941 struct sockaddr_in new_sin = *si;
4943 new_sin.sin_addr.s_addr = htonl(src);
4944 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 1);
4947 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: in_ifinit "
4948 " failed, error=%d\n", SPP_ARGS(ifp), error);
4951 /* delete old route */
4952 error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
4955 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
4956 SPP_ARGS(ifp), error);
4960 in_iahash_remove(ia);
4962 /* set new address */
4963 si->sin_addr.s_addr = htonl(src);
4964 in_iahash_insert(ia);
4967 error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);
4970 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
4971 SPP_ARGS(ifp), error);
4979 * Get both IPv6 addresses.
4982 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst,
4983 struct in6_addr *srcmask)
4985 struct ifnet *ifp = &sp->pp_if;
4986 struct ifaddr_container *ifac;
4988 struct sockaddr_in6 *si, *sm;
4989 struct in6_addr ssrc, ddst;
4992 bzero(&ssrc, sizeof(ssrc));
4993 bzero(&ddst, sizeof(ddst));
4995 * Pick the first link-local AF_INET6 address from the list,
4996 * aliases don't make any sense on a p2p link anyway.
4999 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
5001 if (ifa->ifa_addr->sa_family == AF_INET6) {
5002 si = (struct sockaddr_in6 *)ifa->ifa_addr;
5003 sm = (struct sockaddr_in6 *)ifa->ifa_netmask;
5004 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr))
5009 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) {
5010 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc));
5012 bcopy(&sm->sin6_addr, srcmask,
5017 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
5018 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr))
5019 bcopy(&si->sin6_addr, &ddst, sizeof(ddst));
5023 bcopy(&ddst, dst, sizeof(*dst));
5025 bcopy(&ssrc, src, sizeof(*src));
5028 #ifdef IPV6CP_MYIFID_DYN
5030 * Generate random ifid.
5033 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr)
5039 * Set my IPv6 address. Must be called at splimp.
5042 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src)
5045 struct ifaddr_container *ifac;
5047 struct sockaddr_in6 *sin6;
5050 * Pick the first link-local AF_INET6 address from the list,
5051 * aliases don't make any sense on a p2p link anyway.
5055 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
5057 if (ifa->ifa_addr->sa_family == AF_INET6) {
5058 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
5059 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
5064 if (ifac != NULL && sin6 != NULL) {
5066 struct sockaddr_in6 new_sin6 = *sin6;
5068 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr));
5069 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1);
5070 if (debug && error) {
5071 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit "
5072 " failed, error=%d\n", SPP_ARGS(ifp), error);
5079 * Suggest a candidate address to be used by peer.
5082 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest)
5084 struct in6_addr myaddr;
5087 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
5089 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */
5091 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) {
5092 myaddr.s6_addr[14] ^= 0xff;
5093 myaddr.s6_addr[15] ^= 0xff;
5095 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff);
5096 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff);
5099 bcopy(&myaddr, suggest, sizeof(myaddr));
5104 sppp_params(struct sppp *sp, u_long cmd, void *data)
5107 struct ifreq *ifr = (struct ifreq *)data;
5108 struct spppreq *spr;
5111 spr = kmalloc(sizeof(struct spppreq), M_TEMP, M_INTWAIT);
5114 * ifr->ifr_data is supposed to point to a struct spppreq.
5115 * Check the cmd word first before attempting to fetch all the
5118 if ((subcmd = fuword(ifr->ifr_data)) == -1) {
5123 if (copyin((caddr_t)ifr->ifr_data, spr, sizeof(struct spppreq)) != 0) {
5129 case (int)SPPPIOGDEFS:
5130 if (cmd != SIOCGIFGENERIC) {
5135 * We copy over the entire current state, but clean
5136 * out some of the stuff we don't wanna pass up.
5137 * Remember, SIOCGIFGENERIC is unprotected, and can be
5138 * called by any user. No need to ever get PAP or
5139 * CHAP secrets back to userland anyway.
5141 spr->defs.pp_phase = sp->pp_phase;
5142 spr->defs.enable_vj = (sp->confflags & CONF_ENABLE_VJ) != 0;
5143 spr->defs.enable_ipv6 = (sp->confflags & CONF_ENABLE_IPV6) != 0;
5144 spr->defs.lcp = sp->lcp;
5145 spr->defs.ipcp = sp->ipcp;
5146 spr->defs.ipv6cp = sp->ipv6cp;
5147 spr->defs.myauth = sp->myauth;
5148 spr->defs.hisauth = sp->hisauth;
5149 bzero(spr->defs.myauth.secret, AUTHKEYLEN);
5150 bzero(spr->defs.myauth.challenge, AUTHKEYLEN);
5151 bzero(spr->defs.hisauth.secret, AUTHKEYLEN);
5152 bzero(spr->defs.hisauth.challenge, AUTHKEYLEN);
5154 * Fixup the LCP timeout value to milliseconds so
5155 * spppcontrol doesn't need to bother about the value
5156 * of "hz". We do the reverse calculation below when
5159 spr->defs.lcp.timeout = sp->lcp.timeout * 1000 / hz;
5160 rv = copyout(spr, (caddr_t)ifr->ifr_data,
5161 sizeof(struct spppreq));
5164 case (int)SPPPIOSDEFS:
5165 if (cmd != SIOCSIFGENERIC) {
5170 * We have a very specific idea of which fields we
5171 * allow being passed back from userland, so to not
5172 * clobber our current state. For one, we only allow
5173 * setting anything if LCP is in dead or establish
5174 * phase. Once the authentication negotiations
5175 * started, the authentication settings must not be
5176 * changed again. (The administrator can force an
5177 * ifconfig down in order to get LCP back into dead
5180 * Also, we only allow for authentication parameters to be
5183 * XXX Should allow to set or clear pp_flags.
5185 * Finally, if the respective authentication protocol to
5186 * be used is set differently than 0, but the secret is
5187 * passed as all zeros, we don't trash the existing secret.
5188 * This allows an administrator to change the system name
5189 * only without clobbering the secret (which he didn't get
5190 * back in a previous SPPPIOGDEFS call). However, the
5191 * secrets are cleared if the authentication protocol is
5193 if (sp->pp_phase != PHASE_DEAD &&
5194 sp->pp_phase != PHASE_ESTABLISH) {
5199 if ((spr->defs.myauth.proto != 0 && spr->defs.myauth.proto != PPP_PAP &&
5200 spr->defs.myauth.proto != PPP_CHAP) ||
5201 (spr->defs.hisauth.proto != 0 && spr->defs.hisauth.proto != PPP_PAP &&
5202 spr->defs.hisauth.proto != PPP_CHAP)) {
5207 if (spr->defs.myauth.proto == 0)
5208 /* resetting myauth */
5209 bzero(&sp->myauth, sizeof sp->myauth);
5211 /* setting/changing myauth */
5212 sp->myauth.proto = spr->defs.myauth.proto;
5213 bcopy(spr->defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
5214 if (spr->defs.myauth.secret[0] != '\0')
5215 bcopy(spr->defs.myauth.secret, sp->myauth.secret,
5218 if (spr->defs.hisauth.proto == 0)
5219 /* resetting hisauth */
5220 bzero(&sp->hisauth, sizeof sp->hisauth);
5222 /* setting/changing hisauth */
5223 sp->hisauth.proto = spr->defs.hisauth.proto;
5224 sp->hisauth.flags = spr->defs.hisauth.flags;
5225 bcopy(spr->defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
5226 if (spr->defs.hisauth.secret[0] != '\0')
5227 bcopy(spr->defs.hisauth.secret, sp->hisauth.secret,
5230 /* set LCP restart timer timeout */
5231 if (spr->defs.lcp.timeout != 0)
5232 sp->lcp.timeout = spr->defs.lcp.timeout * hz / 1000;
5233 /* set VJ enable and IPv6 disable flags */
5235 if (spr->defs.enable_vj)
5236 sp->confflags |= CONF_ENABLE_VJ;
5238 sp->confflags &= ~CONF_ENABLE_VJ;
5241 if (spr->defs.enable_ipv6)
5242 sp->confflags |= CONF_ENABLE_IPV6;
5244 sp->confflags &= ~CONF_ENABLE_IPV6;
5259 sppp_phase_network(struct sppp *sp)
5265 sp->pp_phase = PHASE_NETWORK;
5268 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
5269 sppp_phase_name(sp->pp_phase));
5271 /* Notify NCPs now. */
5272 for (i = 0; i < IDX_COUNT; i++)
5273 if ((cps[i])->flags & CP_NCP)
5276 /* Send Up events to all NCPs. */
5277 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
5278 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP))
5281 /* if no NCP is starting, all this was in vain, close down */
5282 sppp_lcp_check_and_close(sp);
5287 sppp_cp_type_name(u_char type)
5289 static char buf[12];
5291 case CONF_REQ: return "conf-req";
5292 case CONF_ACK: return "conf-ack";
5293 case CONF_NAK: return "conf-nak";
5294 case CONF_REJ: return "conf-rej";
5295 case TERM_REQ: return "term-req";
5296 case TERM_ACK: return "term-ack";
5297 case CODE_REJ: return "code-rej";
5298 case PROTO_REJ: return "proto-rej";
5299 case ECHO_REQ: return "echo-req";
5300 case ECHO_REPLY: return "echo-reply";
5301 case DISC_REQ: return "discard-req";
5303 ksnprintf (buf, sizeof(buf), "cp/0x%x", type);
5308 sppp_auth_type_name(u_short proto, u_char type)
5310 static char buf[12];
5314 case CHAP_CHALLENGE: return "challenge";
5315 case CHAP_RESPONSE: return "response";
5316 case CHAP_SUCCESS: return "success";
5317 case CHAP_FAILURE: return "failure";
5321 case PAP_REQ: return "req";
5322 case PAP_ACK: return "ack";
5323 case PAP_NAK: return "nak";
5326 ksnprintf (buf, sizeof(buf), "auth/0x%x", type);
5331 sppp_lcp_opt_name(u_char opt)
5333 static char buf[12];
5335 case LCP_OPT_MRU: return "mru";
5336 case LCP_OPT_ASYNC_MAP: return "async-map";
5337 case LCP_OPT_AUTH_PROTO: return "auth-proto";
5338 case LCP_OPT_QUAL_PROTO: return "qual-proto";
5339 case LCP_OPT_MAGIC: return "magic";
5340 case LCP_OPT_PROTO_COMP: return "proto-comp";
5341 case LCP_OPT_ADDR_COMP: return "addr-comp";
5343 ksnprintf (buf, sizeof(buf), "lcp/0x%x", opt);
5348 sppp_ipcp_opt_name(u_char opt)
5350 static char buf[12];
5352 case IPCP_OPT_ADDRESSES: return "addresses";
5353 case IPCP_OPT_COMPRESSION: return "compression";
5354 case IPCP_OPT_ADDRESS: return "address";
5356 ksnprintf (buf, sizeof(buf), "ipcp/0x%x", opt);
5362 sppp_ipv6cp_opt_name(u_char opt)
5364 static char buf[12];
5366 case IPV6CP_OPT_IFID: return "ifid";
5367 case IPV6CP_OPT_COMPRESSION: return "compression";
5369 ksprintf (buf, "0x%x", opt);
5375 sppp_state_name(int state)
5378 case STATE_INITIAL: return "initial";
5379 case STATE_STARTING: return "starting";
5380 case STATE_CLOSED: return "closed";
5381 case STATE_STOPPED: return "stopped";
5382 case STATE_CLOSING: return "closing";
5383 case STATE_STOPPING: return "stopping";
5384 case STATE_REQ_SENT: return "req-sent";
5385 case STATE_ACK_RCVD: return "ack-rcvd";
5386 case STATE_ACK_SENT: return "ack-sent";
5387 case STATE_OPENED: return "opened";
5393 sppp_phase_name(enum ppp_phase phase)
5396 case PHASE_DEAD: return "dead";
5397 case PHASE_ESTABLISH: return "establish";
5398 case PHASE_TERMINATE: return "terminate";
5399 case PHASE_AUTHENTICATE: return "authenticate";
5400 case PHASE_NETWORK: return "network";
5406 sppp_proto_name(u_short proto)
5408 static char buf[12];
5410 case PPP_LCP: return "lcp";
5411 case PPP_IPCP: return "ipcp";
5412 case PPP_PAP: return "pap";
5413 case PPP_CHAP: return "chap";
5414 case PPP_IPV6CP: return "ipv6cp";
5416 ksnprintf(buf, sizeof(buf), "proto/0x%x", (unsigned)proto);
5421 sppp_print_bytes(const u_char *p, u_short len)
5424 log(-1, " %*D", len, p, "-");
5428 sppp_print_string(const char *p, u_short len)
5435 * Print only ASCII chars directly. RFC 1994 recommends
5436 * using only them, but we don't rely on it. */
5437 if (c < ' ' || c > '~')
5438 log(-1, "\\x%x", c);
5445 sppp_dotted_quad(u_long addr)
5448 ksprintf(s, "%d.%d.%d.%d",
5449 (int)((addr >> 24) & 0xff),
5450 (int)((addr >> 16) & 0xff),
5451 (int)((addr >> 8) & 0xff),
5452 (int)(addr & 0xff));
5457 sppp_strnlen(u_char *p, int max)
5461 for (len = 0; len < max && *p; ++p)
5466 /* a dummy, used to drop uninteresting events */
5468 sppp_null(struct sppp *unused)
5470 /* do just nothing */