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)
485 static moduledata_t spppmod = {
490 MODULE_VERSION(sppp, 1);
491 DECLARE_MODULE(sppp, spppmod, SI_SUB_DRIVERS, SI_ORDER_ANY);
494 * Exported functions, comprising our interface to the lower layer.
498 * Process the received packet.
501 sppp_input(struct ifnet *ifp, struct mbuf *m)
503 struct ppp_header *h;
505 struct sppp *sp = (struct sppp *)ifp;
507 int hlen, vjlen, do_account = 0;
508 int debug = ifp->if_flags & IFF_DEBUG;
510 if (ifp->if_flags & IFF_UP)
511 /* Count received bytes, add FCS and one flag */
512 ifp->if_ibytes += m->m_pkthdr.len + 3;
514 if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
515 /* Too small packet, drop it. */
518 SPP_FMT "input packet is too small, %d bytes\n",
519 SPP_ARGS(ifp), m->m_pkthdr.len);
528 /* Get PPP header. */
529 h = mtod (m, struct ppp_header*);
530 m_adj (m, PPP_HEADER_LEN);
532 switch (h->address) {
533 case PPP_ALLSTATIONS:
534 if (h->control != PPP_UI)
536 if (sp->pp_mode == IFF_CISCO) {
539 SPP_FMT "PPP packet in Cisco mode "
540 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
542 h->address, h->control, ntohs(h->protocol));
545 switch (ntohs (h->protocol)) {
549 SPP_FMT "rejecting protocol "
550 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
552 h->address, h->control, ntohs(h->protocol));
553 if (sp->state[IDX_LCP] == STATE_OPENED)
554 sppp_cp_send (sp, PPP_LCP, PROTO_REJ,
555 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2,
560 sppp_cp_input(&lcp, sp, m);
564 if (sp->pp_phase >= PHASE_AUTHENTICATE)
565 sppp_pap_input(sp, m);
569 if (sp->pp_phase >= PHASE_AUTHENTICATE)
570 sppp_chap_input(sp, m);
575 if (sp->pp_phase == PHASE_NETWORK)
576 sppp_cp_input(&ipcp, sp, m);
580 if (sp->state[IDX_IPCP] == STATE_OPENED) {
586 if (sp->state[IDX_IPCP] == STATE_OPENED) {
588 sl_uncompress_tcp_core(mtod(m, u_char *),
592 &iphdr, &hlen)) <= 0) {
595 SPP_FMT "VJ uncompress failed on compressed packet\n",
601 * Trim the VJ header off the packet, and prepend
602 * the uncompressed IP header (which will usually
603 * end up in two chained mbufs since there's not
604 * enough leading space in the existing mbuf).
607 M_PREPEND(m, hlen, MB_DONTWAIT);
610 bcopy(iphdr, mtod(m, u_char *), hlen);
617 if (sp->state[IDX_IPCP] == STATE_OPENED) {
618 if (sl_uncompress_tcp_core(mtod(m, u_char *),
620 TYPE_UNCOMPRESSED_TCP,
622 &iphdr, &hlen) != 0) {
625 SPP_FMT "VJ uncompress failed on uncompressed packet\n",
636 if (sp->pp_phase == PHASE_NETWORK)
637 sppp_cp_input(&ipv6cp, sp, m);
642 if (sp->state[IDX_IPV6CP] == STATE_OPENED) {
650 /* IPX IPXCP not implemented yet */
651 if (sp->pp_phase == PHASE_NETWORK) {
659 /* XNS IDPCP not implemented yet */
660 if (sp->pp_phase == PHASE_NETWORK) {
668 case CISCO_MULTICAST:
670 /* Don't check the control field here (RFC 1547). */
671 if (sp->pp_mode != IFF_CISCO) {
674 SPP_FMT "Cisco packet in PPP mode "
675 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
677 h->address, h->control, ntohs(h->protocol));
680 switch (ntohs (h->protocol)) {
684 case CISCO_KEEPALIVE:
685 sppp_cisco_input ((struct sppp*) ifp, m);
714 default: /* Invalid PPP packet. */
718 SPP_FMT "invalid input packet "
719 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
721 h->address, h->control, ntohs(h->protocol));
725 if (! (ifp->if_flags & IFF_UP) || isr < 0)
730 netisr_dispatch(isr, m);
733 * Do only account for network packets, not for control
734 * packets. This is used by some subsystems to detect
737 sp->pp_last_recv = time_second;
741 * Enqueue transmit packet.
744 sppp_output_serialized(struct ifnet *ifp, struct mbuf *m,
745 struct sockaddr *dst, struct rtentry *rt)
747 struct sppp *sp = (struct sppp*) ifp;
748 struct ppp_header *h;
749 struct ifqueue *ifq = NULL;
751 int ipproto = PPP_IP;
752 int debug = ifp->if_flags & IFF_DEBUG;
753 struct altq_pktattr pktattr;
757 if ((ifp->if_flags & IFF_UP) == 0 ||
758 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) {
767 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) {
772 * Hack to prevent the initialization-time generated
773 * IPv6 multicast packet to erroneously cause a
774 * dialout event in case IPv6 has been
775 * administratively disabled on that interface.
777 if (dst->sa_family == AF_INET6 &&
778 !(sp->confflags & CONF_ENABLE_IPV6))
782 * Interface is not yet running, but auto-dial. Need
783 * to start LCP for it.
785 ifp->if_flags |= IFF_RUNNING;
792 * if the queueing discipline needs packet classification,
793 * do it before prepending link headers.
795 ifq_classify(&ifp->if_snd, m, dst->sa_family, &pktattr);
798 if (dst->sa_family == AF_INET) {
799 /* XXX Check mbuf length here? */
800 struct ip *ip = mtod (m, struct ip*);
801 struct tcphdr *tcp = (struct tcphdr*) ((long*)ip + ip->ip_hl);
804 * When using dynamic local IP address assignment by using
805 * 0.0.0.0 as a local address, the first TCP session will
806 * not connect because the local TCP checksum is computed
807 * using 0.0.0.0 which will later become our real IP address
808 * so the TCP checksum computed at the remote end will
809 * become invalid. So we
810 * - don't let packets with src ip addr 0 thru
811 * - we flag TCP packets with src ip 0 as an error
814 if(ip->ip_src.s_addr == INADDR_ANY) /* -hm */
818 if(ip->ip_p == IPPROTO_TCP)
819 return(EADDRNOTAVAIL);
825 * Put low delay, telnet, rlogin and ftp control packets
826 * in front of the queue.
828 if (IF_QFULL (&sp->pp_fastq))
830 else if (ip->ip_tos & IPTOS_LOWDELAY)
832 else if (m->m_len < sizeof *ip + sizeof *tcp)
834 else if (ip->ip_p != IPPROTO_TCP)
836 else if (INTERACTIVE (ntohs (tcp->th_sport)))
838 else if (INTERACTIVE (ntohs (tcp->th_dport)))
842 * Do IP Header compression
844 if (sp->pp_mode != IFF_CISCO && (sp->ipcp.flags & IPCP_VJ) &&
845 ip->ip_p == IPPROTO_TCP)
846 switch (sl_compress_tcp(m, ip, sp->pp_comp,
847 sp->ipcp.compress_cid)) {
848 case TYPE_COMPRESSED_TCP:
849 ipproto = PPP_VJ_COMP;
851 case TYPE_UNCOMPRESSED_TCP:
852 ipproto = PPP_VJ_UCOMP;
866 if (dst->sa_family == AF_INET6) {
867 /* XXX do something tricky here? */
872 * Prepend general data packet PPP header. For now, IP only.
874 M_PREPEND (m, PPP_HEADER_LEN, MB_DONTWAIT);
877 log(LOG_DEBUG, SPP_FMT "no memory for transmit header\n",
884 * May want to check size of packet
885 * (albeit due to the implementation it's always enough)
887 h = mtod (m, struct ppp_header*);
888 if (sp->pp_mode == IFF_CISCO) {
889 h->address = CISCO_UNICAST; /* unicast address */
892 h->address = PPP_ALLSTATIONS; /* broadcast address */
893 h->control = PPP_UI; /* Unnumbered Info */
896 switch (dst->sa_family) {
898 case AF_INET: /* Internet Protocol */
899 if (sp->pp_mode == IFF_CISCO)
900 h->protocol = htons (ETHERTYPE_IP);
903 * Don't choke with an ENETDOWN early. It's
904 * possible that we just started dialing out,
905 * so don't drop the packet immediately. If
906 * we notice that we run out of buffer space
907 * below, we will however remember that we are
908 * not ready to carry IP packets, and return
909 * ENETDOWN, as opposed to ENOBUFS.
911 h->protocol = htons(ipproto);
912 if (sp->state[IDX_IPCP] != STATE_OPENED)
918 case AF_INET6: /* Internet Protocol */
919 if (sp->pp_mode == IFF_CISCO)
920 h->protocol = htons (ETHERTYPE_IPV6);
923 * Don't choke with an ENETDOWN early. It's
924 * possible that we just started dialing out,
925 * so don't drop the packet immediately. If
926 * we notice that we run out of buffer space
927 * below, we will however remember that we are
928 * not ready to carry IP packets, and return
929 * ENETDOWN, as opposed to ENOBUFS.
931 h->protocol = htons(PPP_IPV6);
932 if (sp->state[IDX_IPV6CP] != STATE_OPENED)
938 case AF_NS: /* Xerox NS Protocol */
939 h->protocol = htons (sp->pp_mode == IFF_CISCO ?
940 ETHERTYPE_NS : PPP_XNS);
944 case AF_IPX: /* Novell IPX Protocol */
945 h->protocol = htons (sp->pp_mode == IFF_CISCO ?
946 ETHERTYPE_IPX : PPP_IPX);
953 return (EAFNOSUPPORT);
957 * Queue message on interface, and start output if interface
971 rv = ifq_enqueue(&ifp->if_snd, m, &pktattr);
978 if (! (ifp->if_flags & IFF_OACTIVE))
979 (*ifp->if_start) (ifp);
982 * Count output packets and bytes.
983 * The packet length includes header, FCS and 1 flag,
984 * according to RFC 1333.
986 ifp->if_obytes += m->m_pkthdr.len + 3;
989 * Unlike in sppp_input(), we can always bump the timestamp
990 * here since sppp_output() is only called on behalf of
991 * network-layer traffic; control-layer traffic is handled
994 sp->pp_last_sent = time_second;
1001 sppp_output(struct ifnet *ifp, struct mbuf *m,
1002 struct sockaddr *dst, struct rtentry *rt)
1006 lwkt_serialize_enter(ifp->if_serializer);
1007 error = sppp_output_serialized(ifp, m, dst, rt);
1008 lwkt_serialize_exit(ifp->if_serializer);
1014 sppp_attach(struct ifnet *ifp)
1016 struct sppp *sp = (struct sppp*) ifp;
1018 /* Initialize keepalive handler. */
1020 callout_reset(&keepalive_timeout, hz * 10,
1021 sppp_keepalive, NULL);
1023 /* Insert new entry into the keepalive list. */
1024 sp->pp_next = spppq;
1027 sp->pp_if.if_mtu = PP_MTU;
1028 sp->pp_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST;
1029 sp->pp_if.if_type = IFT_PPP;
1030 sp->pp_if.if_output = sppp_output;
1032 sp->pp_flags = PP_KEEPALIVE;
1034 sp->pp_if.if_snd.ifq_maxlen = 32;
1035 sp->pp_fastq.ifq_maxlen = 32;
1036 sp->pp_cpq.ifq_maxlen = 20;
1038 sp->pp_alivecnt = 0;
1039 bzero(&sp->pp_seq[0], sizeof(sp->pp_seq));
1040 bzero(&sp->pp_rseq[0], sizeof(sp->pp_rseq));
1041 sp->pp_phase = PHASE_DEAD;
1043 sp->pp_down = lcp.Down;
1044 sp->pp_last_recv = sp->pp_last_sent = time_second;
1047 sp->confflags |= CONF_ENABLE_VJ;
1050 sp->confflags |= CONF_ENABLE_IPV6;
1052 sp->pp_comp = kmalloc(sizeof(struct slcompress), M_TEMP, M_WAITOK);
1053 sl_compress_init(sp->pp_comp, -1);
1056 sppp_ipv6cp_init(sp);
1062 sppp_detach(struct ifnet *ifp)
1064 struct sppp **q, *p, *sp = (struct sppp*) ifp;
1067 /* Remove the entry from the keepalive list. */
1068 for (q = &spppq; (p = *q); q = &p->pp_next)
1074 /* Stop keepalive handler. */
1076 callout_stop(&keepalive_timeout);
1078 for (i = 0; i < IDX_COUNT; i++)
1079 callout_stop(&sp->timeout[i]);
1080 callout_stop(&sp->pap_my_to);
1084 * Flush the interface output queue.
1087 sppp_flush(struct ifnet *ifp)
1089 struct sppp *sp = (struct sppp*) ifp;
1091 ifq_purge(&sp->pp_if.if_snd);
1092 IF_DRAIN(&sp->pp_fastq);
1093 IF_DRAIN(&sp->pp_cpq);
1097 * Check if the output queue is empty.
1100 sppp_isempty(struct ifnet *ifp)
1102 struct sppp *sp = (struct sppp*) ifp;
1106 empty = IF_QEMPTY(&sp->pp_fastq) && IF_QEMPTY(&sp->pp_cpq) &&
1107 ifq_is_empty(&sp->pp_if.if_snd);
1113 * Get next packet to send.
1116 sppp_dequeue(struct ifnet *ifp)
1118 struct sppp *sp = (struct sppp*) ifp;
1124 * Process only the control protocol queue until we have at
1125 * least one NCP open.
1127 * Do always serve all three queues in Cisco mode.
1129 IF_DEQUEUE(&sp->pp_cpq, m);
1131 (sppp_ncp_check(sp) || sp->pp_mode == IFF_CISCO)) {
1132 IF_DEQUEUE(&sp->pp_fastq, m);
1134 m = ifq_dequeue(&sp->pp_if.if_snd, NULL);
1142 * Pick the next packet, do not remove it from the queue.
1145 sppp_pick(struct ifnet *ifp)
1147 struct sppp *sp = (struct sppp*)ifp;
1152 m = sp->pp_cpq.ifq_head;
1154 (sp->pp_phase == PHASE_NETWORK || sp->pp_mode == IFF_CISCO)) {
1155 if ((m = sp->pp_fastq.ifq_head) == NULL)
1156 m = ifq_poll(&sp->pp_if.if_snd);
1164 * Process an ioctl request. Called on low priority level.
1167 sppp_ioctl(struct ifnet *ifp, IOCTL_CMD_T cmd, void *data)
1169 struct ifreq *ifr = (struct ifreq*) data;
1170 struct sppp *sp = (struct sppp*) ifp;
1171 int rv, going_up, going_down, newmode;
1178 case SIOCSIFDSTADDR:
1182 /* set the interface "up" when assigning an IP address */
1183 ifp->if_flags |= IFF_UP;
1184 /* fall through... */
1187 going_up = ifp->if_flags & IFF_UP &&
1188 (ifp->if_flags & IFF_RUNNING) == 0;
1189 going_down = (ifp->if_flags & IFF_UP) == 0 &&
1190 ifp->if_flags & IFF_RUNNING;
1192 newmode = ifp->if_flags & IFF_PASSIVE;
1194 newmode = ifp->if_flags & IFF_AUTO;
1196 newmode = ifp->if_flags & IFF_CISCO;
1197 ifp->if_flags &= ~(IFF_PASSIVE | IFF_AUTO | IFF_CISCO);
1198 ifp->if_flags |= newmode;
1200 if (newmode != sp->pp_mode) {
1203 going_up = ifp->if_flags & IFF_RUNNING;
1207 if (sp->pp_mode != IFF_CISCO)
1209 else if (sp->pp_tlf)
1212 ifp->if_flags &= ~IFF_RUNNING;
1213 sp->pp_mode = newmode;
1217 if (sp->pp_mode != IFF_CISCO)
1219 sp->pp_mode = newmode;
1220 if (sp->pp_mode == 0) {
1221 ifp->if_flags |= IFF_RUNNING;
1224 if (sp->pp_mode == IFF_CISCO) {
1227 ifp->if_flags |= IFF_RUNNING;
1235 #define ifr_mtu ifr_metric
1238 if (ifr->ifr_mtu < 128 || ifr->ifr_mtu > sp->lcp.their_mru)
1240 ifp->if_mtu = ifr->ifr_mtu;
1245 if (*(short*)data < 128 || *(short*)data > sp->lcp.their_mru)
1247 ifp->if_mtu = *(short*)data;
1252 ifr->ifr_mtu = ifp->if_mtu;
1257 *(short*)data = ifp->if_mtu;
1264 case SIOCGIFGENERIC:
1265 case SIOCSIFGENERIC:
1266 rv = sppp_params(sp, cmd, data);
1278 * Cisco framing implementation.
1282 * Handle incoming Cisco keepalive protocol packets.
1285 sppp_cisco_input(struct sppp *sp, struct mbuf *m)
1288 struct cisco_packet *h;
1291 if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
1294 SPP_FMT "cisco invalid packet length: %d bytes\n",
1295 SPP_ARGS(ifp), m->m_pkthdr.len);
1298 h = mtod (m, struct cisco_packet*);
1301 SPP_FMT "cisco input: %d bytes "
1302 "<0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1303 SPP_ARGS(ifp), m->m_pkthdr.len,
1304 (u_long)ntohl (h->type), (u_long)h->par1, (u_long)h->par2, (u_int)h->rel,
1305 (u_int)h->time0, (u_int)h->time1);
1306 switch (ntohl (h->type)) {
1309 log(-1, SPP_FMT "cisco unknown packet type: 0x%lx\n",
1310 SPP_ARGS(ifp), (u_long)ntohl (h->type));
1312 case CISCO_ADDR_REPLY:
1313 /* Reply on address request, ignore */
1315 case CISCO_KEEPALIVE_REQ:
1316 sp->pp_alivecnt = 0;
1317 sp->pp_rseq[IDX_LCP] = ntohl (h->par1);
1318 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) {
1319 /* Local and remote sequence numbers are equal.
1320 * Probably, the line is in loopback mode. */
1321 if (sp->pp_loopcnt >= MAXALIVECNT) {
1322 kprintf (SPP_FMT "loopback\n",
1325 if (ifp->if_flags & IFF_UP) {
1327 IF_DRAIN(&sp->pp_cpq);
1332 /* Generate new local sequence number */
1333 #if defined(__DragonFly__)
1334 sp->pp_seq[IDX_LCP] = krandom();
1336 sp->pp_seq[IDX_LCP] ^= time.tv_sec ^ time.tv_usec;
1341 if (! (ifp->if_flags & IFF_UP) &&
1342 (ifp->if_flags & IFF_RUNNING)) {
1344 kprintf (SPP_FMT "up\n", SPP_ARGS(ifp));
1347 case CISCO_ADDR_REQ:
1348 sppp_get_ip_addrs(sp, &me, 0, &mymask);
1350 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
1356 * Send Cisco keepalive packet.
1359 sppp_cisco_send(struct sppp *sp, int type, long par1, long par2)
1362 struct ppp_header *h;
1363 struct cisco_packet *ch;
1365 #if defined(__DragonFly__)
1368 u_long t = (time.tv_sec - boottime.tv_sec) * 1000;
1371 #if defined(__DragonFly__)
1372 getmicrouptime(&tv);
1375 MGETHDR (m, MB_DONTWAIT, MT_DATA);
1378 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
1379 m->m_pkthdr.rcvif = 0;
1381 h = mtod (m, struct ppp_header*);
1382 h->address = CISCO_MULTICAST;
1384 h->protocol = htons (CISCO_KEEPALIVE);
1386 ch = (struct cisco_packet*) (h + 1);
1387 ch->type = htonl (type);
1388 ch->par1 = htonl (par1);
1389 ch->par2 = htonl (par2);
1392 #if defined(__DragonFly__)
1393 ch->time0 = htons ((u_short) (tv.tv_sec >> 16));
1394 ch->time1 = htons ((u_short) tv.tv_sec);
1396 ch->time0 = htons ((u_short) (t >> 16));
1397 ch->time1 = htons ((u_short) t);
1402 SPP_FMT "cisco output: <0x%lx 0x%lx 0x%lx 0x%x 0x%x-0x%x>\n",
1403 SPP_ARGS(ifp), (u_long)ntohl (ch->type), (u_long)ch->par1,
1404 (u_long)ch->par2, (u_int)ch->rel, (u_int)ch->time0, (u_int)ch->time1);
1406 if (IF_QFULL (&sp->pp_cpq)) {
1407 IF_DROP (&sp->pp_fastq);
1408 IF_DROP (&ifp->if_snd);
1411 IF_ENQUEUE (&sp->pp_cpq, m);
1412 if (! (ifp->if_flags & IFF_OACTIVE))
1413 (*ifp->if_start) (ifp);
1414 ifp->if_obytes += m->m_pkthdr.len + 3;
1418 * PPP protocol implementation.
1422 * Send PPP control protocol packet.
1425 sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
1426 u_char ident, u_short len, void *data)
1429 struct ppp_header *h;
1430 struct lcp_header *lh;
1433 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN)
1434 len = MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN;
1435 MGETHDR (m, MB_DONTWAIT, MT_DATA);
1438 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
1439 m->m_pkthdr.rcvif = 0;
1441 h = mtod (m, struct ppp_header*);
1442 h->address = PPP_ALLSTATIONS; /* broadcast address */
1443 h->control = PPP_UI; /* Unnumbered Info */
1444 h->protocol = htons (proto); /* Link Control Protocol */
1446 lh = (struct lcp_header*) (h + 1);
1449 lh->len = htons (LCP_HEADER_LEN + len);
1451 bcopy (data, lh+1, len);
1454 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
1456 sppp_proto_name(proto),
1457 sppp_cp_type_name (lh->type), lh->ident,
1459 sppp_print_bytes ((u_char*) (lh+1), len);
1462 if (IF_QFULL (&sp->pp_cpq)) {
1463 IF_DROP (&sp->pp_fastq);
1464 IF_DROP (&ifp->if_snd);
1468 IF_ENQUEUE (&sp->pp_cpq, m);
1469 if (! (ifp->if_flags & IFF_OACTIVE))
1470 (*ifp->if_start) (ifp);
1471 ifp->if_obytes += m->m_pkthdr.len + 3;
1475 * Handle incoming PPP control protocol packets.
1478 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
1481 struct lcp_header *h;
1482 int printlen, len = m->m_pkthdr.len;
1489 SPP_FMT "%s invalid packet length: %d bytes\n",
1490 SPP_ARGS(ifp), cp->name, len);
1493 h = mtod (m, struct lcp_header*);
1495 printlen = ntohs(h->len);
1497 SPP_FMT "%s input(%s): <%s id=0x%x len=%d",
1498 SPP_ARGS(ifp), cp->name,
1499 sppp_state_name(sp->state[cp->protoidx]),
1500 sppp_cp_type_name (h->type), h->ident, printlen);
1504 sppp_print_bytes ((u_char*) (h+1), printlen - 4);
1507 if (len > ntohs (h->len))
1508 len = ntohs (h->len);
1509 p = (u_char *)(h + 1);
1514 log(-1, SPP_FMT "%s invalid conf-req length %d\n",
1515 SPP_ARGS(ifp), cp->name,
1520 /* handle states where RCR doesn't get a SCA/SCN */
1521 switch (sp->state[cp->protoidx]) {
1523 case STATE_STOPPING:
1526 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
1530 rv = (cp->RCR)(sp, h, len);
1532 /* fatal error, shut down */
1537 switch (sp->state[cp->protoidx]) {
1541 /* fall through... */
1542 case STATE_ACK_SENT:
1543 case STATE_REQ_SENT:
1545 * sppp_cp_change_state() have the side effect of
1546 * restarting the timeouts. We want to avoid that
1547 * if the state don't change, otherwise we won't
1548 * ever timeout and resend a configuration request
1551 if (sp->state[cp->protoidx] == (rv ? STATE_ACK_SENT:
1554 sppp_cp_change_state(cp, sp, rv?
1555 STATE_ACK_SENT: STATE_REQ_SENT);
1558 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1560 sppp_cp_change_state(cp, sp, rv?
1561 STATE_ACK_SENT: STATE_REQ_SENT);
1563 case STATE_ACK_RCVD:
1565 sppp_cp_change_state(cp, sp, STATE_OPENED);
1567 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1572 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1575 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1576 SPP_ARGS(ifp), cp->name,
1577 sppp_cp_type_name(h->type),
1578 sppp_state_name(sp->state[cp->protoidx]));
1583 if (h->ident != sp->confid[cp->protoidx]) {
1585 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1586 SPP_ARGS(ifp), cp->name,
1587 h->ident, sp->confid[cp->protoidx]);
1591 switch (sp->state[cp->protoidx]) {
1594 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1597 case STATE_STOPPING:
1599 case STATE_REQ_SENT:
1600 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1601 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1606 case STATE_ACK_RCVD:
1608 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1610 case STATE_ACK_SENT:
1611 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1612 sppp_cp_change_state(cp, sp, STATE_OPENED);
1614 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
1615 SPP_ARGS(ifp), cp->name);
1619 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1620 SPP_ARGS(ifp), cp->name,
1621 sppp_cp_type_name(h->type),
1622 sppp_state_name(sp->state[cp->protoidx]));
1628 if (h->ident != sp->confid[cp->protoidx]) {
1630 log(-1, SPP_FMT "%s id mismatch 0x%x != 0x%x\n",
1631 SPP_ARGS(ifp), cp->name,
1632 h->ident, sp->confid[cp->protoidx]);
1636 if (h->type == CONF_NAK)
1637 (cp->RCN_nak)(sp, h, len);
1639 (cp->RCN_rej)(sp, h, len);
1641 switch (sp->state[cp->protoidx]) {
1644 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1646 case STATE_REQ_SENT:
1647 case STATE_ACK_SENT:
1648 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1650 * Slow things down a bit if we think we might be
1651 * in loopback. Depend on the timeout to send the
1652 * next configuration request.
1661 case STATE_ACK_RCVD:
1662 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1666 case STATE_STOPPING:
1669 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1670 SPP_ARGS(ifp), cp->name,
1671 sppp_cp_type_name(h->type),
1672 sppp_state_name(sp->state[cp->protoidx]));
1678 switch (sp->state[cp->protoidx]) {
1679 case STATE_ACK_RCVD:
1680 case STATE_ACK_SENT:
1681 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1686 case STATE_STOPPING:
1687 case STATE_REQ_SENT:
1689 /* Send Terminate-Ack packet. */
1691 log(LOG_DEBUG, SPP_FMT "%s send terminate-ack\n",
1692 SPP_ARGS(ifp), cp->name);
1693 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1697 sp->rst_counter[cp->protoidx] = 0;
1698 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1702 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1703 SPP_ARGS(ifp), cp->name,
1704 sppp_cp_type_name(h->type),
1705 sppp_state_name(sp->state[cp->protoidx]));
1710 switch (sp->state[cp->protoidx]) {
1713 case STATE_REQ_SENT:
1714 case STATE_ACK_SENT:
1717 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1720 case STATE_STOPPING:
1721 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1724 case STATE_ACK_RCVD:
1725 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1730 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1733 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1734 SPP_ARGS(ifp), cp->name,
1735 sppp_cp_type_name(h->type),
1736 sppp_state_name(sp->state[cp->protoidx]));
1741 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1743 SPP_FMT "%s: ignoring RXJ (%s) for proto 0x%x, "
1744 "danger will robinson\n",
1745 SPP_ARGS(ifp), cp->name,
1746 sppp_cp_type_name(h->type), ntohs(*((u_short *)p)));
1747 switch (sp->state[cp->protoidx]) {
1750 case STATE_REQ_SENT:
1751 case STATE_ACK_SENT:
1753 case STATE_STOPPING:
1756 case STATE_ACK_RCVD:
1757 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1760 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1761 SPP_ARGS(ifp), cp->name,
1762 sppp_cp_type_name(h->type),
1763 sppp_state_name(sp->state[cp->protoidx]));
1770 const struct cp *upper;
1776 proto = ntohs(*((u_int16_t *)p));
1777 for (i = 0; i < IDX_COUNT; i++) {
1778 if (cps[i]->proto == proto) {
1786 if (catastrophic || debug)
1787 log(catastrophic? LOG_INFO: LOG_DEBUG,
1788 SPP_FMT "%s: RXJ%c (%s) for proto 0x%x (%s/%s)\n",
1789 SPP_ARGS(ifp), cp->name, catastrophic ? '-' : '+',
1790 sppp_cp_type_name(h->type), proto,
1791 upper ? upper->name : "unknown",
1792 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?");
1795 * if we got RXJ+ against conf-req, the peer does not implement
1796 * this particular protocol type. terminate the protocol.
1798 if (upper && !catastrophic) {
1799 if (sp->state[upper->protoidx] == STATE_REQ_SENT) {
1805 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1806 switch (sp->state[cp->protoidx]) {
1809 case STATE_REQ_SENT:
1810 case STATE_ACK_SENT:
1812 case STATE_STOPPING:
1815 case STATE_ACK_RCVD:
1816 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1819 kprintf(SPP_FMT "%s illegal %s in state %s\n",
1820 SPP_ARGS(ifp), cp->name,
1821 sppp_cp_type_name(h->type),
1822 sppp_state_name(sp->state[cp->protoidx]));
1828 if (cp->proto != PPP_LCP)
1830 /* Discard the packet. */
1833 if (cp->proto != PPP_LCP)
1835 if (sp->state[cp->protoidx] != STATE_OPENED) {
1837 log(-1, SPP_FMT "lcp echo req but lcp closed\n",
1844 log(-1, SPP_FMT "invalid lcp echo request "
1845 "packet length: %d bytes\n",
1846 SPP_ARGS(ifp), len);
1849 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
1850 ntohl (*(long*)(h+1)) == sp->lcp.magic) {
1851 /* Line loopback mode detected. */
1852 kprintf(SPP_FMT "loopback\n", SPP_ARGS(ifp));
1853 sp->pp_loopcnt = MAXALIVECNT * 5;
1855 IF_DRAIN(&sp->pp_cpq);
1857 /* Shut down the PPP link. */
1863 *(long*)(h+1) = htonl (sp->lcp.magic);
1865 log(-1, SPP_FMT "got lcp echo req, sending echo rep\n",
1867 sppp_cp_send (sp, PPP_LCP, ECHO_REPLY, h->ident, len-4, h+1);
1870 if (cp->proto != PPP_LCP)
1872 if (h->ident != sp->lcp.echoid) {
1878 log(-1, SPP_FMT "lcp invalid echo reply "
1879 "packet length: %d bytes\n",
1880 SPP_ARGS(ifp), len);
1884 log(-1, SPP_FMT "lcp got echo rep\n",
1886 if (!(sp->lcp.opts & (1 << LCP_OPT_MAGIC)) ||
1887 ntohl (*(long*)(h+1)) != sp->lcp.magic)
1888 sp->pp_alivecnt = 0;
1891 /* Unknown packet type -- send Code-Reject packet. */
1894 log(-1, SPP_FMT "%s send code-rej for 0x%x\n",
1895 SPP_ARGS(ifp), cp->name, h->type);
1896 sppp_cp_send(sp, cp->proto, CODE_REJ,
1897 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h);
1904 * The generic part of all Up/Down/Open/Close/TO event handlers.
1905 * Basically, the state transition handling in the automaton.
1908 sppp_up_event(const struct cp *cp, struct sppp *sp)
1913 log(LOG_DEBUG, SPP_FMT "%s up(%s)\n",
1914 SPP_ARGS(ifp), cp->name,
1915 sppp_state_name(sp->state[cp->protoidx]));
1917 switch (sp->state[cp->protoidx]) {
1919 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1921 case STATE_STARTING:
1922 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1924 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1927 kprintf(SPP_FMT "%s illegal up in state %s\n",
1928 SPP_ARGS(ifp), cp->name,
1929 sppp_state_name(sp->state[cp->protoidx]));
1934 sppp_down_event(const struct cp *cp, struct sppp *sp)
1939 log(LOG_DEBUG, SPP_FMT "%s down(%s)\n",
1940 SPP_ARGS(ifp), cp->name,
1941 sppp_state_name(sp->state[cp->protoidx]));
1943 switch (sp->state[cp->protoidx]) {
1946 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1949 sppp_cp_change_state(cp, sp, STATE_STARTING);
1952 case STATE_STOPPING:
1953 case STATE_REQ_SENT:
1954 case STATE_ACK_RCVD:
1955 case STATE_ACK_SENT:
1956 sppp_cp_change_state(cp, sp, STATE_STARTING);
1960 sppp_cp_change_state(cp, sp, STATE_STARTING);
1963 kprintf(SPP_FMT "%s illegal down in state %s\n",
1964 SPP_ARGS(ifp), cp->name,
1965 sppp_state_name(sp->state[cp->protoidx]));
1971 sppp_open_event(const struct cp *cp, struct sppp *sp)
1976 log(LOG_DEBUG, SPP_FMT "%s open(%s)\n",
1977 SPP_ARGS(ifp), cp->name,
1978 sppp_state_name(sp->state[cp->protoidx]));
1980 switch (sp->state[cp->protoidx]) {
1982 sppp_cp_change_state(cp, sp, STATE_STARTING);
1985 case STATE_STARTING:
1988 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1990 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1994 * Try escaping stopped state. This seems to bite
1995 * people occasionally, in particular for IPCP,
1996 * presumably following previous IPCP negotiation
1997 * aborts. Somehow, we must have missed a Down event
1998 * which would have caused a transition into starting
1999 * state, so as a bandaid we force the Down event now.
2000 * This effectively implements (something like the)
2001 * `restart' option mentioned in the state transition
2002 * table of RFC 1661.
2004 sppp_cp_change_state(cp, sp, STATE_STARTING);
2007 case STATE_STOPPING:
2008 case STATE_REQ_SENT:
2009 case STATE_ACK_RCVD:
2010 case STATE_ACK_SENT:
2014 sppp_cp_change_state(cp, sp, STATE_STOPPING);
2021 sppp_close_event(const struct cp *cp, struct sppp *sp)
2026 log(LOG_DEBUG, SPP_FMT "%s close(%s)\n",
2027 SPP_ARGS(ifp), cp->name,
2028 sppp_state_name(sp->state[cp->protoidx]));
2030 switch (sp->state[cp->protoidx]) {
2035 case STATE_STARTING:
2036 sppp_cp_change_state(cp, sp, STATE_INITIAL);
2040 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2042 case STATE_STOPPING:
2043 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2048 case STATE_REQ_SENT:
2049 case STATE_ACK_RCVD:
2050 case STATE_ACK_SENT:
2051 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
2052 sppp_cp_send(sp, cp->proto, TERM_REQ,
2053 ++sp->pp_seq[cp->protoidx], 0, 0);
2054 sppp_cp_change_state(cp, sp, STATE_CLOSING);
2060 sppp_to_event(const struct cp *cp, struct sppp *sp)
2067 log(LOG_DEBUG, SPP_FMT "%s TO(%s) rst_counter = %d\n",
2068 SPP_ARGS(ifp), cp->name,
2069 sppp_state_name(sp->state[cp->protoidx]),
2070 sp->rst_counter[cp->protoidx]);
2072 if (--sp->rst_counter[cp->protoidx] < 0)
2074 switch (sp->state[cp->protoidx]) {
2076 sppp_cp_change_state(cp, sp, STATE_CLOSED);
2079 case STATE_STOPPING:
2080 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2083 case STATE_REQ_SENT:
2084 case STATE_ACK_RCVD:
2085 case STATE_ACK_SENT:
2086 sppp_cp_change_state(cp, sp, STATE_STOPPED);
2092 switch (sp->state[cp->protoidx]) {
2094 case STATE_STOPPING:
2095 sppp_cp_send(sp, cp->proto, TERM_REQ,
2096 ++sp->pp_seq[cp->protoidx], 0, 0);
2097 callout_reset(&sp->timeout[cp->protoidx],
2098 sp->lcp.timeout, cp->TO, sp);
2100 case STATE_REQ_SENT:
2101 case STATE_ACK_RCVD:
2103 /* sppp_cp_change_state() will restart the timer */
2104 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
2106 case STATE_ACK_SENT:
2108 callout_reset(&sp->timeout[cp->protoidx],
2109 sp->lcp.timeout, cp->TO, sp);
2117 * Change the state of a control protocol in the state automaton.
2118 * Takes care of starting/stopping the restart timer.
2121 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
2123 sp->state[cp->protoidx] = newstate;
2124 callout_stop(&sp->timeout[cp->protoidx]);
2128 case STATE_STARTING:
2134 case STATE_STOPPING:
2135 case STATE_REQ_SENT:
2136 case STATE_ACK_RCVD:
2137 case STATE_ACK_SENT:
2138 callout_reset(&sp->timeout[cp->protoidx],
2139 sp->lcp.timeout, cp->TO, sp);
2145 *--------------------------------------------------------------------------*
2147 * The LCP implementation. *
2149 *--------------------------------------------------------------------------*
2152 sppp_lcp_init(struct sppp *sp)
2154 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2156 sp->state[IDX_LCP] = STATE_INITIAL;
2157 sp->fail_counter[IDX_LCP] = 0;
2158 sp->pp_seq[IDX_LCP] = 0;
2159 sp->pp_rseq[IDX_LCP] = 0;
2161 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2163 /* Note that these values are relevant for all control protocols */
2164 sp->lcp.timeout = 3 * hz;
2165 sp->lcp.max_terminate = 2;
2166 sp->lcp.max_configure = 10;
2167 sp->lcp.max_failure = 10;
2168 #if defined(__DragonFly__)
2169 callout_init(&sp->timeout[IDX_LCP]);
2174 sppp_lcp_up(struct sppp *sp)
2178 sp->pp_alivecnt = 0;
2179 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
2182 sp->lcp.mru = sp->lcp.their_mru = PP_MTU;
2184 * If this interface is passive or dial-on-demand, and we are
2185 * still in Initial state, it means we've got an incoming
2186 * call. Activate the interface.
2188 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
2191 SPP_FMT "Up event", SPP_ARGS(ifp));
2192 ifp->if_flags |= IFF_RUNNING;
2193 if (sp->state[IDX_LCP] == STATE_INITIAL) {
2195 log(-1, "(incoming call)\n");
2196 sp->pp_flags |= PP_CALLIN;
2200 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 &&
2201 (sp->state[IDX_LCP] == STATE_INITIAL)) {
2202 ifp->if_flags |= IFF_RUNNING;
2206 sppp_up_event(&lcp, sp);
2210 sppp_lcp_down(struct sppp *sp)
2214 sppp_down_event(&lcp, sp);
2217 * If this is neither a dial-on-demand nor a passive
2218 * interface, simulate an ``ifconfig down'' action, so the
2219 * administrator can force a redial by another ``ifconfig
2220 * up''. XXX For leased line operation, should we immediately
2221 * try to reopen the connection here?
2223 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
2225 SPP_FMT "Down event, taking interface down.\n",
2231 SPP_FMT "Down event (carrier loss)\n",
2233 sp->pp_flags &= ~PP_CALLIN;
2234 if (sp->state[IDX_LCP] != STATE_INITIAL)
2236 ifp->if_flags &= ~IFF_RUNNING;
2241 sppp_lcp_open(struct sppp *sp)
2244 * If we are authenticator, negotiate LCP_AUTH
2246 if (sp->hisauth.proto != 0)
2247 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
2249 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2250 sp->pp_flags &= ~PP_NEEDAUTH;
2251 sppp_open_event(&lcp, sp);
2255 sppp_lcp_close(struct sppp *sp)
2257 sppp_close_event(&lcp, sp);
2261 sppp_lcp_TO(void *cookie)
2263 sppp_to_event(&lcp, (struct sppp *)cookie);
2267 * Analyze a configure request. Return true if it was agreeable, and
2268 * caused action sca, false if it has been rejected or nak'ed, and
2269 * caused action scn. (The return value is used to make the state
2270 * transition decision in the state automaton.)
2273 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2276 u_char *buf, *r, *p;
2283 buf = r = kmalloc (len, M_TEMP, M_INTWAIT);
2286 log(LOG_DEBUG, SPP_FMT "lcp parse opts: ",
2289 /* pass 1: check for things that need to be rejected */
2291 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2292 /* Sanity check option length */
2294 /* Malicious option - drop immediately.
2295 * XXX Maybe we should just RXJ it?
2297 log(-1, "%s: received malicious LCP option 0x%02x, "
2298 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname,
2303 log(-1, " %s ", sppp_lcp_opt_name(*p));
2307 if (len >= 6 && p[1] == 6)
2310 log(-1, "[invalid] ");
2312 case LCP_OPT_ASYNC_MAP:
2313 /* Async control character map. */
2314 if (len >= 6 && p[1] == 6)
2317 log(-1, "[invalid] ");
2320 /* Maximum receive unit. */
2321 if (len >= 4 && p[1] == 4)
2324 log(-1, "[invalid] ");
2326 case LCP_OPT_AUTH_PROTO:
2329 log(-1, "[invalid] ");
2332 authproto = (p[2] << 8) + p[3];
2333 if (authproto == PPP_CHAP && p[1] != 5) {
2335 log(-1, "[invalid chap len] ");
2338 if (sp->myauth.proto == 0) {
2339 /* we are not configured to do auth */
2341 log(-1, "[not configured] ");
2345 * Remote want us to authenticate, remember this,
2346 * so we stay in PHASE_AUTHENTICATE after LCP got
2349 sp->pp_flags |= PP_NEEDAUTH;
2352 /* Others not supported. */
2357 /* Add the option to rejected list. */
2364 log(-1, " send conf-rej\n");
2365 sppp_cp_send (sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2371 * pass 2: check for option values that are unacceptable and
2372 * thus require to be nak'ed.
2375 log(LOG_DEBUG, SPP_FMT "lcp parse opt values: ",
2380 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2382 log(-1, " %s ", sppp_lcp_opt_name(*p));
2385 /* Magic number -- extract. */
2386 nmagic = (u_long)p[2] << 24 |
2387 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2388 if (nmagic != sp->lcp.magic) {
2391 log(-1, "0x%lx ", nmagic);
2394 if (debug && sp->pp_loopcnt < MAXALIVECNT*5)
2395 log(-1, "[glitch] ");
2398 * We negate our magic here, and NAK it. If
2399 * we see it later in an NAK packet, we
2400 * suggest a new one.
2402 nmagic = ~sp->lcp.magic;
2404 p[2] = nmagic >> 24;
2405 p[3] = nmagic >> 16;
2410 case LCP_OPT_ASYNC_MAP:
2412 * Async control character map -- just ignore it.
2414 * Quote from RFC 1662, chapter 6:
2415 * To enable this functionality, synchronous PPP
2416 * implementations MUST always respond to the
2417 * Async-Control-Character-Map Configuration
2418 * Option with the LCP Configure-Ack. However,
2419 * acceptance of the Configuration Option does
2420 * not imply that the synchronous implementation
2421 * will do any ACCM mapping. Instead, all such
2422 * octet mapping will be performed by the
2423 * asynchronous-to-synchronous converter.
2429 * Maximum receive unit. Always agreeable,
2430 * but ignored by now.
2432 sp->lcp.their_mru = p[2] * 256 + p[3];
2434 log(-1, "%lu ", sp->lcp.their_mru);
2437 case LCP_OPT_AUTH_PROTO:
2438 authproto = (p[2] << 8) + p[3];
2439 if (sp->myauth.proto != authproto) {
2440 /* not agreed, nak */
2442 log(-1, "[mine %s != his %s] ",
2443 sppp_proto_name(sp->hisauth.proto),
2444 sppp_proto_name(authproto));
2445 p[2] = sp->myauth.proto >> 8;
2446 p[3] = sp->myauth.proto;
2449 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
2451 log(-1, "[chap not MD5] ");
2457 /* Add the option to nak'ed list. */
2464 * Local and remote magics equal -- loopback?
2466 if (sp->pp_loopcnt >= MAXALIVECNT*5) {
2467 if (sp->pp_loopcnt == MAXALIVECNT*5)
2468 kprintf (SPP_FMT "loopback\n",
2470 if (ifp->if_flags & IFF_UP) {
2472 IF_DRAIN(&sp->pp_cpq);
2477 } else if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
2479 log(-1, " max_failure (%d) exceeded, "
2481 sp->lcp.max_failure);
2482 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2485 log(-1, " send conf-nak\n");
2486 sppp_cp_send (sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
2490 log(-1, " send conf-ack\n");
2491 sp->fail_counter[IDX_LCP] = 0;
2493 sppp_cp_send (sp, PPP_LCP, CONF_ACK,
2494 h->ident, origlen, h+1);
2497 kfree (buf, M_TEMP);
2506 * Analyze the LCP Configure-Reject option list, and adjust our
2510 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
2516 buf = kmalloc (len, M_TEMP, M_INTWAIT);
2519 log(LOG_DEBUG, SPP_FMT "lcp rej opts: ",
2523 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2524 /* Sanity check option length */
2527 * Malicious option - drop immediately.
2528 * XXX Maybe we should just RXJ it?
2530 log(-1, "%s: received malicious LCP option, "
2531 "dropping.\n", ifp->if_xname);
2535 log(-1, " %s ", sppp_lcp_opt_name(*p));
2538 /* Magic number -- can't use it, use 0 */
2539 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
2544 * Should not be rejected anyway, since we only
2545 * negotiate a MRU if explicitly requested by
2548 sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
2550 case LCP_OPT_AUTH_PROTO:
2552 * Peer doesn't want to authenticate himself,
2553 * deny unless this is a dialout call, and
2554 * AUTHFLAG_NOCALLOUT is set.
2556 if ((sp->pp_flags & PP_CALLIN) == 0 &&
2557 (sp->hisauth.flags & AUTHFLAG_NOCALLOUT) != 0) {
2559 log(-1, "[don't insist on auth "
2561 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2565 log(-1, "[access denied]\n");
2573 kfree (buf, M_TEMP);
2578 * Analyze the LCP Configure-NAK option list, and adjust our
2582 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
2589 buf = kmalloc (len, M_TEMP, M_INTWAIT);
2592 log(LOG_DEBUG, SPP_FMT "lcp nak opts: ",
2596 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2597 /* Sanity check option length */
2600 * Malicious option - drop immediately.
2601 * XXX Maybe we should just RXJ it?
2603 log(-1, "%s: received malicious LCP option, "
2604 "dropping.\n", ifp->if_xname);
2608 log(-1, " %s ", sppp_lcp_opt_name(*p));
2611 /* Magic number -- renegotiate */
2612 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
2613 len >= 6 && p[1] == 6) {
2614 magic = (u_long)p[2] << 24 |
2615 (u_long)p[3] << 16 | p[4] << 8 | p[5];
2617 * If the remote magic is our negated one,
2618 * this looks like a loopback problem.
2619 * Suggest a new magic to make sure.
2621 if (magic == ~sp->lcp.magic) {
2623 log(-1, "magic glitch ");
2624 #if defined(__DragonFly__)
2625 sp->lcp.magic = krandom();
2627 sp->lcp.magic = time.tv_sec + time.tv_usec;
2630 sp->lcp.magic = magic;
2632 log(-1, "%lu ", magic);
2638 * Peer wants to advise us to negotiate an MRU.
2639 * Agree on it if it's reasonable, or use
2640 * default otherwise.
2642 if (len >= 4 && p[1] == 4) {
2643 u_int mru = p[2] * 256 + p[3];
2645 log(-1, "%d ", mru);
2646 if (mru < PP_MTU || mru > PP_MAX_MRU)
2649 sp->lcp.opts |= (1 << LCP_OPT_MRU);
2652 case LCP_OPT_AUTH_PROTO:
2654 * Peer doesn't like our authentication method,
2658 log(-1, "[access denied]\n");
2666 kfree (buf, M_TEMP);
2671 sppp_lcp_tlu(struct sppp *sp)
2678 if (! (ifp->if_flags & IFF_UP) &&
2679 (ifp->if_flags & IFF_RUNNING)) {
2680 /* Coming out of loopback mode. */
2682 kprintf (SPP_FMT "up\n", SPP_ARGS(ifp));
2685 for (i = 0; i < IDX_COUNT; i++)
2686 if ((cps[i])->flags & CP_QUAL)
2689 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
2690 (sp->pp_flags & PP_NEEDAUTH) != 0)
2691 sp->pp_phase = PHASE_AUTHENTICATE;
2693 sp->pp_phase = PHASE_NETWORK;
2696 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2697 sppp_phase_name(sp->pp_phase));
2700 * Open all authentication protocols. This is even required
2701 * if we already proceeded to network phase, since it might be
2702 * that remote wants us to authenticate, so we might have to
2703 * send a PAP request. Undesired authentication protocols
2704 * don't do anything when they get an Open event.
2706 for (i = 0; i < IDX_COUNT; i++)
2707 if ((cps[i])->flags & CP_AUTH)
2710 if (sp->pp_phase == PHASE_NETWORK) {
2711 /* Notify all NCPs. */
2712 for (i = 0; i < IDX_COUNT; i++)
2713 if (((cps[i])->flags & CP_NCP) &&
2716 * Hack to administratively disable IPv6 if
2717 * not desired. Perhaps we should have another
2718 * flag for this, but right now, we can make
2719 * all struct cp's read/only.
2721 (cps[i] != &ipv6cp ||
2722 (sp->confflags & CONF_ENABLE_IPV6)))
2726 /* Send Up events to all started protos. */
2727 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2728 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0)
2731 /* notify low-level driver of state change */
2733 sp->pp_chg(sp, (int)sp->pp_phase);
2735 if (sp->pp_phase == PHASE_NETWORK)
2736 /* if no NCP is starting, close down */
2737 sppp_lcp_check_and_close(sp);
2741 sppp_lcp_tld(struct sppp *sp)
2747 sp->pp_phase = PHASE_TERMINATE;
2750 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2751 sppp_phase_name(sp->pp_phase));
2754 * Take upper layers down. We send the Down event first and
2755 * the Close second to prevent the upper layers from sending
2756 * ``a flurry of terminate-request packets'', as the RFC
2759 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2760 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) {
2762 (cps[i])->Close(sp);
2767 sppp_lcp_tls(struct sppp *sp)
2771 sp->pp_phase = PHASE_ESTABLISH;
2774 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2775 sppp_phase_name(sp->pp_phase));
2777 /* Notify lower layer if desired. */
2785 sppp_lcp_tlf(struct sppp *sp)
2789 sp->pp_phase = PHASE_DEAD;
2791 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
2792 sppp_phase_name(sp->pp_phase));
2794 /* Notify lower layer if desired. */
2802 sppp_lcp_scr(struct sppp *sp)
2804 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
2808 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
2809 if (! sp->lcp.magic)
2810 #if defined(__DragonFly__)
2811 sp->lcp.magic = krandom();
2813 sp->lcp.magic = time.tv_sec + time.tv_usec;
2815 opt[i++] = LCP_OPT_MAGIC;
2817 opt[i++] = sp->lcp.magic >> 24;
2818 opt[i++] = sp->lcp.magic >> 16;
2819 opt[i++] = sp->lcp.magic >> 8;
2820 opt[i++] = sp->lcp.magic;
2823 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
2824 opt[i++] = LCP_OPT_MRU;
2826 opt[i++] = sp->lcp.mru >> 8;
2827 opt[i++] = sp->lcp.mru;
2830 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
2831 authproto = sp->hisauth.proto;
2832 opt[i++] = LCP_OPT_AUTH_PROTO;
2833 opt[i++] = authproto == PPP_CHAP? 5: 4;
2834 opt[i++] = authproto >> 8;
2835 opt[i++] = authproto;
2836 if (authproto == PPP_CHAP)
2837 opt[i++] = CHAP_MD5;
2840 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP];
2841 sppp_cp_send (sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
2845 * Check the open NCPs, return true if at least one NCP is open.
2848 sppp_ncp_check(struct sppp *sp)
2852 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2853 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP)
2859 * Re-check the open NCPs and see if we should terminate the link.
2860 * Called by the NCPs during their tlf action handling.
2863 sppp_lcp_check_and_close(struct sppp *sp)
2866 if (sp->pp_phase < PHASE_NETWORK)
2867 /* don't bother, we are already going down */
2870 if (sppp_ncp_check(sp))
2877 *--------------------------------------------------------------------------*
2879 * The IPCP implementation. *
2881 *--------------------------------------------------------------------------*
2885 sppp_ipcp_init(struct sppp *sp)
2889 sp->state[IDX_IPCP] = STATE_INITIAL;
2890 sp->fail_counter[IDX_IPCP] = 0;
2891 sp->pp_seq[IDX_IPCP] = 0;
2892 sp->pp_rseq[IDX_IPCP] = 0;
2893 #if defined(__DragonFly__)
2894 callout_init(&sp->timeout[IDX_IPCP]);
2899 sppp_ipcp_up(struct sppp *sp)
2901 sppp_up_event(&ipcp, sp);
2905 sppp_ipcp_down(struct sppp *sp)
2907 sppp_down_event(&ipcp, sp);
2911 sppp_ipcp_open(struct sppp *sp)
2914 u_long myaddr, hisaddr;
2916 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN | IPCP_MYADDR_SEEN |
2917 IPCP_MYADDR_DYN | IPCP_VJ);
2920 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
2922 * If we don't have his address, this probably means our
2923 * interface doesn't want to talk IP at all. (This could
2924 * be the case if somebody wants to speak only IPX, for
2925 * example.) Don't open IPCP in this case.
2927 if (hisaddr == 0L) {
2928 /* XXX this message should go away */
2930 log(LOG_DEBUG, SPP_FMT "ipcp_open(): no IP interface\n",
2936 * I don't have an assigned address, so i need to
2937 * negotiate my address.
2939 sp->ipcp.flags |= IPCP_MYADDR_DYN;
2940 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
2942 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
2943 if (sp->confflags & CONF_ENABLE_VJ) {
2944 sp->ipcp.opts |= (1 << IPCP_OPT_COMPRESSION);
2945 sp->ipcp.max_state = MAX_STATES - 1;
2946 sp->ipcp.compress_cid = 1;
2948 sppp_open_event(&ipcp, sp);
2952 sppp_ipcp_close(struct sppp *sp)
2954 sppp_close_event(&ipcp, sp);
2955 if (sp->ipcp.flags & IPCP_MYADDR_DYN)
2957 * My address was dynamic, clear it again.
2959 sppp_set_ip_addr(sp, 0L);
2963 sppp_ipcp_TO(void *cookie)
2965 sppp_to_event(&ipcp, (struct sppp *)cookie);
2969 * Analyze a configure request. Return true if it was agreeable, and
2970 * caused action sca, false if it has been rejected or nak'ed, and
2971 * caused action scn. (The return value is used to make the state
2972 * transition decision in the state automaton.)
2975 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2977 u_char *buf, *r, *p;
2978 struct ifnet *ifp = &sp->pp_if;
2979 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
2980 u_long hisaddr, desiredaddr;
2987 * Make sure to allocate a buf that can at least hold a
2988 * conf-nak with an `address' option. We might need it below.
2990 buf = r = kmalloc ((len < 6? 6: len), M_TEMP, M_INTWAIT);
2992 /* pass 1: see if we can recognize them */
2994 log(LOG_DEBUG, SPP_FMT "ipcp parse opts: ",
2997 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2998 /* Sanity check option length */
3000 /* XXX should we just RXJ? */
3001 log(-1, "%s: malicious IPCP option received, dropping\n",
3006 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3008 case IPCP_OPT_COMPRESSION:
3009 if (!(sp->confflags & CONF_ENABLE_VJ)) {
3010 /* VJ compression administratively disabled */
3012 log(-1, "[locally disabled] ");
3016 * In theory, we should only conf-rej an
3017 * option that is shorter than RFC 1618
3018 * requires (i.e. < 4), and should conf-nak
3019 * anything else that is not VJ. However,
3020 * since our algorithm always uses the
3021 * original option to NAK it with new values,
3022 * things would become more complicated. In
3023 * pratice, the only commonly implemented IP
3024 * compression option is VJ anyway, so the
3025 * difference is negligible.
3027 if (len >= 6 && p[1] == 6) {
3029 * correctly formed compression option
3030 * that could be VJ compression
3035 log(-1, "optlen %d [invalid/unsupported] ",
3038 case IPCP_OPT_ADDRESS:
3039 if (len >= 6 && p[1] == 6) {
3040 /* correctly formed address option */
3044 log(-1, "[invalid] ");
3047 /* Others not supported. */
3052 /* Add the option to rejected list. */
3059 log(-1, " send conf-rej\n");
3060 sppp_cp_send (sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
3065 /* pass 2: parse option values */
3066 sppp_get_ip_addrs(sp, 0, &hisaddr, 0);
3068 log(LOG_DEBUG, SPP_FMT "ipcp parse opt values: ",
3072 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3074 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3076 case IPCP_OPT_COMPRESSION:
3077 desiredcomp = p[2] << 8 | p[3];
3078 /* We only support VJ */
3079 if (desiredcomp == IPCP_COMP_VJ) {
3081 log(-1, "VJ [ack] ");
3082 sp->ipcp.flags |= IPCP_VJ;
3083 sl_compress_init(sp->pp_comp, p[4]);
3084 sp->ipcp.max_state = p[4];
3085 sp->ipcp.compress_cid = p[5];
3089 log(-1, "compproto %#04x [not supported] ",
3091 p[2] = IPCP_COMP_VJ >> 8;
3092 p[3] = IPCP_COMP_VJ;
3093 p[4] = sp->ipcp.max_state;
3094 p[5] = sp->ipcp.compress_cid;
3096 case IPCP_OPT_ADDRESS:
3097 /* This is the address he wants in his end */
3098 desiredaddr = p[2] << 24 | p[3] << 16 |
3100 if (desiredaddr == hisaddr ||
3101 (hisaddr >= 1 && hisaddr <= 254 && desiredaddr != 0)) {
3103 * Peer's address is same as our value,
3104 * or we have set it to 0.0.0.* to
3105 * indicate that we do not really care,
3106 * this is agreeable. Gonna conf-ack
3110 log(-1, "%s [ack] ",
3111 sppp_dotted_quad(hisaddr));
3112 /* record that we've seen it already */
3113 sp->ipcp.flags |= IPCP_HISADDR_SEEN;
3117 * The address wasn't agreeable. This is either
3118 * he sent us 0.0.0.0, asking to assign him an
3119 * address, or he send us another address not
3120 * matching our value. Either case, we gonna
3121 * conf-nak it with our value.
3122 * XXX: we should "rej" if hisaddr == 0
3125 if (desiredaddr == 0)
3126 log(-1, "[addr requested] ");
3128 log(-1, "%s [not agreed] ",
3129 sppp_dotted_quad(desiredaddr));
3132 p[2] = hisaddr >> 24;
3133 p[3] = hisaddr >> 16;
3134 p[4] = hisaddr >> 8;
3138 /* Add the option to nak'ed list. */
3145 * If we are about to conf-ack the request, but haven't seen
3146 * his address so far, gonna conf-nak it instead, with the
3147 * `address' option present and our idea of his address being
3148 * filled in there, to request negotiation of both addresses.
3150 * XXX This can result in an endless req - nak loop if peer
3151 * doesn't want to send us his address. Q: What should we do
3152 * about it? XXX A: implement the max-failure counter.
3154 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN) && !gotmyaddr) {
3155 buf[0] = IPCP_OPT_ADDRESS;
3157 buf[2] = hisaddr >> 24;
3158 buf[3] = hisaddr >> 16;
3159 buf[4] = hisaddr >> 8;
3163 log(-1, "still need hisaddr ");
3168 log(-1, " send conf-nak\n");
3169 sppp_cp_send (sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
3172 log(-1, " send conf-ack\n");
3173 sppp_cp_send (sp, PPP_IPCP, CONF_ACK,
3174 h->ident, origlen, h+1);
3177 kfree (buf, M_TEMP);
3186 * Analyze the IPCP Configure-Reject option list, and adjust our
3190 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3193 struct ifnet *ifp = &sp->pp_if;
3194 int debug = ifp->if_flags & IFF_DEBUG;
3197 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3200 log(LOG_DEBUG, SPP_FMT "ipcp rej opts: ",
3204 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3205 /* Sanity check option length */
3207 /* XXX should we just RXJ? */
3208 log(-1, "%s: malicious IPCP option received, dropping\n",
3213 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3215 case IPCP_OPT_COMPRESSION:
3216 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESSION);
3218 case IPCP_OPT_ADDRESS:
3220 * Peer doesn't grok address option. This is
3221 * bad. XXX Should we better give up here?
3222 * XXX We could try old "addresses" option...
3224 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
3231 kfree (buf, M_TEMP);
3236 * Analyze the IPCP Configure-NAK option list, and adjust our
3240 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3243 struct ifnet *ifp = &sp->pp_if;
3244 int debug = ifp->if_flags & IFF_DEBUG;
3249 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3252 log(LOG_DEBUG, SPP_FMT "ipcp nak opts: ",
3256 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3257 /* Sanity check option length */
3259 /* XXX should we just RXJ? */
3260 log(-1, "%s: malicious IPCP option received, dropping\n",
3265 log(-1, " %s ", sppp_ipcp_opt_name(*p));
3267 case IPCP_OPT_COMPRESSION:
3268 if (len >= 6 && p[1] == 6) {
3269 desiredcomp = p[2] << 8 | p[3];
3271 log(-1, "[wantcomp %#04x] ",
3273 if (desiredcomp == IPCP_COMP_VJ) {
3274 sl_compress_init(sp->pp_comp, p[4]);
3275 sp->ipcp.max_state = p[4];
3276 sp->ipcp.compress_cid = p[5];
3278 log(-1, "[agree] ");
3281 ~(1 << IPCP_OPT_COMPRESSION);
3284 case IPCP_OPT_ADDRESS:
3286 * Peer doesn't like our local IP address. See
3287 * if we can do something for him. We'll drop
3288 * him our address then.
3290 if (len >= 6 && p[1] == 6) {
3291 wantaddr = p[2] << 24 | p[3] << 16 |
3293 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
3295 log(-1, "[wantaddr %s] ",
3296 sppp_dotted_quad(wantaddr));
3298 * When doing dynamic address assignment,
3299 * we accept his offer. Otherwise, we
3300 * ignore it and thus continue to negotiate
3301 * our already existing value.
3302 * XXX: Bogus, if he said no once, he'll
3303 * just say no again, might as well die.
3305 if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
3306 sppp_set_ip_addr(sp, wantaddr);
3308 log(-1, "[agree] ");
3309 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
3317 kfree (buf, M_TEMP);
3322 sppp_ipcp_tlu(struct sppp *sp)
3324 /* we are up - notify isdn daemon */
3330 sppp_ipcp_tld(struct sppp *sp)
3335 sppp_ipcp_tls(struct sppp *sp)
3337 /* indicate to LCP that it must stay alive */
3338 sp->lcp.protos |= (1 << IDX_IPCP);
3342 sppp_ipcp_tlf(struct sppp *sp)
3344 /* we no longer need LCP */
3345 sp->lcp.protos &= ~(1 << IDX_IPCP);
3346 sppp_lcp_check_and_close(sp);
3350 sppp_ipcp_scr(struct sppp *sp)
3352 char opt[6 /* compression */ + 6 /* address */];
3356 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
3357 opt[i++] = IPCP_OPT_COMPRESSION;
3359 opt[i++] = IPCP_COMP_VJ >> 8;
3360 opt[i++] = IPCP_COMP_VJ;
3361 opt[i++] = sp->ipcp.max_state;
3362 opt[i++] = sp->ipcp.compress_cid;
3364 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
3365 sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
3366 opt[i++] = IPCP_OPT_ADDRESS;
3368 opt[i++] = ouraddr >> 24;
3369 opt[i++] = ouraddr >> 16;
3370 opt[i++] = ouraddr >> 8;
3374 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP];
3375 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
3379 *--------------------------------------------------------------------------*
3381 * The IPv6CP implementation. *
3383 *--------------------------------------------------------------------------*
3388 sppp_ipv6cp_init(struct sppp *sp)
3390 sp->ipv6cp.opts = 0;
3391 sp->ipv6cp.flags = 0;
3392 sp->state[IDX_IPV6CP] = STATE_INITIAL;
3393 sp->fail_counter[IDX_IPV6CP] = 0;
3394 sp->pp_seq[IDX_IPV6CP] = 0;
3395 sp->pp_rseq[IDX_IPV6CP] = 0;
3396 #if defined(__NetBSD__)
3397 callout_init(&sp->ch[IDX_IPV6CP]);
3399 #if defined(__DragonFly__)
3400 callout_init(&sp->timeout[IDX_IPV6CP]);
3405 sppp_ipv6cp_up(struct sppp *sp)
3407 sppp_up_event(&ipv6cp, sp);
3411 sppp_ipv6cp_down(struct sppp *sp)
3413 sppp_down_event(&ipv6cp, sp);
3417 sppp_ipv6cp_open(struct sppp *sp)
3420 struct in6_addr myaddr, hisaddr;
3422 #ifdef IPV6CP_MYIFID_DYN
3423 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN);
3425 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN;
3428 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0);
3430 * If we don't have our address, this probably means our
3431 * interface doesn't want to talk IPv6 at all. (This could
3432 * be the case if somebody wants to speak only IPX, for
3433 * example.) Don't open IPv6CP in this case.
3435 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) {
3436 /* XXX this message should go away */
3438 log(LOG_DEBUG, SPP_FMT "ipv6cp_open(): no IPv6 interface\n",
3443 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3444 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3445 sppp_open_event(&ipv6cp, sp);
3449 sppp_ipv6cp_close(struct sppp *sp)
3451 sppp_close_event(&ipv6cp, sp);
3455 sppp_ipv6cp_TO(void *cookie)
3457 sppp_to_event(&ipv6cp, (struct sppp *)cookie);
3461 * Analyze a configure request. Return true if it was agreeable, and
3462 * caused action sca, false if it has been rejected or nak'ed, and
3463 * caused action scn. (The return value is used to make the state
3464 * transition decision in the state automaton.)
3467 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3469 u_char *buf, *r, *p;
3470 struct ifnet *ifp = &sp->pp_if;
3471 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
3472 struct in6_addr myaddr, desiredaddr, suggestaddr;
3475 int collision, nohisaddr;
3480 * Make sure to allocate a buf that can at least hold a
3481 * conf-nak with an `address' option. We might need it below.
3483 buf = r = kmalloc ((len < 6? 6: len), M_TEMP, M_INTWAIT);
3485 /* pass 1: see if we can recognize them */
3487 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opts:",
3491 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3492 /* Sanity check option length */
3495 log(-1, "%s: received malicious IPCPv6 option, "
3496 "dropping\n", ifp->if_xname);
3500 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3502 case IPV6CP_OPT_IFID:
3503 if (len >= 10 && p[1] == 10 && ifidcount == 0) {
3504 /* correctly formed address option */
3509 log(-1, " [invalid]");
3512 case IPV6CP_OPT_COMPRESSION:
3513 if (len >= 4 && p[1] >= 4) {
3514 /* correctly formed compress option */
3518 log(-1, " [invalid]");
3522 /* Others not supported. */
3527 /* Add the option to rejected list. */
3534 log(-1, " send conf-rej\n");
3535 sppp_cp_send (sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf);
3540 /* pass 2: parse option values */
3541 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
3543 log(LOG_DEBUG, SPP_FMT "ipv6cp parse opt values: ",
3548 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3550 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3553 case IPV6CP_OPT_COMPRESSION:
3556 case IPV6CP_OPT_IFID:
3557 bzero(&desiredaddr, sizeof(desiredaddr));
3558 bcopy(&p[2], &desiredaddr.s6_addr[8], 8);
3559 collision = (bcmp(&desiredaddr.s6_addr[8],
3560 &myaddr.s6_addr[8], 8) == 0);
3561 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr);
3563 desiredaddr.s6_addr16[0] = htons(0xfe80);
3564 desiredaddr.s6_addr16[1] = htons(sp->pp_if.if_index);
3566 if (!collision && !nohisaddr) {
3567 /* no collision, hisaddr known - Conf-Ack */
3572 ip6_sprintf(&desiredaddr),
3573 sppp_cp_type_name(type));
3578 bzero(&suggestaddr, sizeof(&suggestaddr));
3579 if (collision && nohisaddr) {
3580 /* collision, hisaddr unknown - Conf-Rej */
3585 * - no collision, hisaddr unknown, or
3586 * - collision, hisaddr known
3587 * Conf-Nak, suggest hisaddr
3590 sppp_suggest_ip6_addr(sp, &suggestaddr);
3591 bcopy(&suggestaddr.s6_addr[8], &p[2], 8);
3594 log(-1, " %s [%s]", ip6_sprintf(&desiredaddr),
3595 sppp_cp_type_name(type));
3598 /* Add the option to nak'ed list. */
3604 if (rlen == 0 && type == CONF_ACK) {
3606 log(-1, " send %s\n", sppp_cp_type_name(type));
3607 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, origlen, h+1);
3610 if (type == CONF_ACK)
3611 panic("IPv6CP RCR: CONF_ACK with non-zero rlen");
3615 log(-1, " send %s suggest %s\n",
3616 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr));
3618 sppp_cp_send (sp, PPP_IPV6CP, type, h->ident, rlen, buf);
3622 kfree (buf, M_TEMP);
3631 * Analyze the IPv6CP Configure-Reject option list, and adjust our
3635 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3638 struct ifnet *ifp = &sp->pp_if;
3639 int debug = ifp->if_flags & IFF_DEBUG;
3642 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3645 log(LOG_DEBUG, SPP_FMT "ipv6cp rej opts:",
3649 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3652 log(-1, "%s: received malicious IPCPv6 option, "
3653 "dropping\n", ifp->if_xname);
3657 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3659 case IPV6CP_OPT_IFID:
3661 * Peer doesn't grok address option. This is
3662 * bad. XXX Should we better give up here?
3664 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID);
3667 case IPV6CP_OPT_COMPRESS:
3668 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS);
3676 kfree (buf, M_TEMP);
3681 * Analyze the IPv6CP Configure-NAK option list, and adjust our
3685 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3688 struct ifnet *ifp = &sp->pp_if;
3689 int debug = ifp->if_flags & IFF_DEBUG;
3690 struct in6_addr suggestaddr;
3693 buf = kmalloc (len, M_TEMP, M_INTWAIT);
3696 log(LOG_DEBUG, SPP_FMT "ipv6cp nak opts:",
3700 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3703 log(-1, "%s: received malicious IPCPv6 option, "
3704 "dropping\n", ifp->if_xname);
3708 log(-1, " %s", sppp_ipv6cp_opt_name(*p));
3710 case IPV6CP_OPT_IFID:
3712 * Peer doesn't like our local ifid. See
3713 * if we can do something for him. We'll drop
3714 * him our address then.
3716 if (len < 10 || p[1] != 10)
3718 bzero(&suggestaddr, sizeof(suggestaddr));
3719 suggestaddr.s6_addr16[0] = htons(0xfe80);
3720 suggestaddr.s6_addr16[1] = htons(sp->pp_if.if_index);
3721 bcopy(&p[2], &suggestaddr.s6_addr[8], 8);
3723 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3725 log(-1, " [suggestaddr %s]",
3726 ip6_sprintf(&suggestaddr));
3727 #ifdef IPV6CP_MYIFID_DYN
3729 * When doing dynamic address assignment,
3730 * we accept his offer.
3732 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) {
3733 struct in6_addr lastsuggest;
3735 * If <suggested myaddr from peer> equals to
3736 * <hisaddr we have suggested last time>,
3737 * we have a collision. generate new random
3740 sppp_suggest_ip6_addr(&lastsuggest);
3741 if (IN6_ARE_ADDR_EQUAL(&suggestaddr,
3744 log(-1, " [random]");
3745 sppp_gen_ip6_addr(sp, &suggestaddr);
3747 sppp_set_ip6_addr(sp, &suggestaddr, 0);
3749 log(-1, " [agree]");
3750 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3754 * Since we do not do dynamic address assignment,
3755 * we ignore it and thus continue to negotiate
3756 * our already existing value. This can possibly
3757 * go into infinite request-reject loop.
3759 * This is not likely because we normally use
3760 * ifid based on MAC-address.
3761 * If you have no ethernet card on the node, too bad.
3762 * XXX should we use fail_counter?
3767 case IPV6CP_OPT_COMPRESS:
3769 * Peer wants different compression parameters.
3778 kfree (buf, M_TEMP);
3782 sppp_ipv6cp_tlu(struct sppp *sp)
3784 /* we are up - notify isdn daemon */
3790 sppp_ipv6cp_tld(struct sppp *sp)
3795 sppp_ipv6cp_tls(struct sppp *sp)
3797 /* indicate to LCP that it must stay alive */
3798 sp->lcp.protos |= (1 << IDX_IPV6CP);
3802 sppp_ipv6cp_tlf(struct sppp *sp)
3805 #if 0 /* need #if 0 to close IPv6CP properly */
3806 /* we no longer need LCP */
3807 sp->lcp.protos &= ~(1 << IDX_IPV6CP);
3808 sppp_lcp_check_and_close(sp);
3813 sppp_ipv6cp_scr(struct sppp *sp)
3815 char opt[10 /* ifid */ + 4 /* compression, minimum */];
3816 struct in6_addr ouraddr;
3819 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) {
3820 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0);
3821 opt[i++] = IPV6CP_OPT_IFID;
3823 bcopy(&ouraddr.s6_addr[8], &opt[i], 8);
3828 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) {
3829 opt[i++] = IPV6CP_OPT_COMPRESSION;
3831 opt[i++] = 0; /* TBD */
3832 opt[i++] = 0; /* TBD */
3833 /* variable length data may follow */
3837 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP];
3838 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt);
3842 sppp_ipv6cp_init(struct sppp *sp)
3847 sppp_ipv6cp_up(struct sppp *sp)
3852 sppp_ipv6cp_down(struct sppp *sp)
3858 sppp_ipv6cp_open(struct sppp *sp)
3863 sppp_ipv6cp_close(struct sppp *sp)
3868 sppp_ipv6cp_TO(void *sp)
3873 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3879 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3884 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3889 sppp_ipv6cp_tlu(struct sppp *sp)
3894 sppp_ipv6cp_tld(struct sppp *sp)
3899 sppp_ipv6cp_tls(struct sppp *sp)
3904 sppp_ipv6cp_tlf(struct sppp *sp)
3909 sppp_ipv6cp_scr(struct sppp *sp)
3915 *--------------------------------------------------------------------------*
3917 * The CHAP implementation. *
3919 *--------------------------------------------------------------------------*
3923 * The authentication protocols don't employ a full-fledged state machine as
3924 * the control protocols do, since they do have Open and Close events, but
3925 * not Up and Down, nor are they explicitly terminated. Also, use of the
3926 * authentication protocols may be different in both directions (this makes
3927 * sense, think of a machine that never accepts incoming calls but only
3928 * calls out, it doesn't require the called party to authenticate itself).
3930 * Our state machine for the local authentication protocol (we are requesting
3931 * the peer to authenticate) looks like:
3934 * +--------------------------------------------+
3936 * +--------+ Close +---------+ RCA+
3937 * | |<----------------------------------| |------+
3938 * +--->| Closed | TO* | Opened | sca |
3939 * | | |-----+ +-------| |<-----+
3940 * | +--------+ irc | | +---------+
3946 * | | +------->+ | |
3948 * | +--------+ V | |
3949 * | | |<----+<--------------------+ |
3955 * +------+ +------------------------------------------+
3956 * scn,tld sca,irc,ict,tlu
3961 * Open: LCP reached authentication phase
3962 * Close: LCP reached terminate phase
3964 * RCA+: received reply (pap-req, chap-response), acceptable
3965 * RCN: received reply (pap-req, chap-response), not acceptable
3966 * TO+: timeout with restart counter >= 0
3967 * TO-: timeout with restart counter < 0
3968 * TO*: reschedule timeout for CHAP
3970 * scr: send request packet (none for PAP, chap-challenge)
3971 * sca: send ack packet (pap-ack, chap-success)
3972 * scn: send nak packet (pap-nak, chap-failure)
3973 * ict: initialize re-challenge timer (CHAP only)
3975 * tlu: this-layer-up, LCP reaches network phase
3976 * tld: this-layer-down, LCP enters terminate phase
3978 * Note that in CHAP mode, after sending a new challenge, while the state
3979 * automaton falls back into Req-Sent state, it doesn't signal a tld
3980 * event to LCP, so LCP remains in network phase. Only after not getting
3981 * any response (or after getting an unacceptable response), CHAP closes,
3982 * causing LCP to enter terminate phase.
3984 * With PAP, there is no initial request that can be sent. The peer is
3985 * expected to send one based on the successful negotiation of PAP as
3986 * the authentication protocol during the LCP option negotiation.
3988 * Incoming authentication protocol requests (remote requests
3989 * authentication, we are peer) don't employ a state machine at all,
3990 * they are simply answered. Some peers [Ascend P50 firmware rev
3991 * 4.50] react allergically when sending IPCP requests while they are
3992 * still in authentication phase (thereby violating the standard that
3993 * demands that these NCP packets are to be discarded), so we keep
3994 * track of the peer demanding us to authenticate, and only proceed to
3995 * phase network once we've seen a positive acknowledge for the
4000 * Handle incoming CHAP packets.
4003 sppp_chap_input(struct sppp *sp, struct mbuf *m)
4006 struct lcp_header *h;
4008 u_char *value, *name, digest[AUTHKEYLEN], dsize;
4009 int value_len, name_len;
4012 len = m->m_pkthdr.len;
4016 SPP_FMT "chap invalid packet length: %d bytes\n",
4017 SPP_ARGS(ifp), len);
4020 h = mtod (m, struct lcp_header*);
4021 if (len > ntohs (h->len))
4022 len = ntohs (h->len);
4025 /* challenge, failure and success are his authproto */
4026 case CHAP_CHALLENGE:
4027 value = 1 + (u_char*)(h+1);
4028 value_len = value[-1];
4029 name = value + value_len;
4030 name_len = len - value_len - 5;
4034 SPP_FMT "chap corrupted challenge "
4035 "<%s id=0x%x len=%d",
4037 sppp_auth_type_name(PPP_CHAP, h->type),
4038 h->ident, ntohs(h->len));
4039 sppp_print_bytes((u_char*) (h+1), len-4);
4047 SPP_FMT "chap input <%s id=0x%x len=%d name=",
4049 sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
4051 sppp_print_string((char*) name, name_len);
4052 log(-1, " value-size=%d value=", value_len);
4053 sppp_print_bytes(value, value_len);
4057 /* Compute reply value. */
4059 MD5Update(&ctx, &h->ident, 1);
4060 MD5Update(&ctx, sp->myauth.secret,
4061 sppp_strnlen(sp->myauth.secret, AUTHKEYLEN));
4062 MD5Update(&ctx, value, value_len);
4063 MD5Final(digest, &ctx);
4064 dsize = sizeof digest;
4066 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
4067 sizeof dsize, (const char *)&dsize,
4068 sizeof digest, digest,
4069 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4076 log(LOG_DEBUG, SPP_FMT "chap success",
4080 sppp_print_string((char*)(h + 1), len - 4);
4087 sp->pp_flags &= ~PP_NEEDAUTH;
4088 if (sp->myauth.proto == PPP_CHAP &&
4089 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4090 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
4092 * We are authenticator for CHAP but didn't
4093 * complete yet. Leave it to tlu to proceed
4100 sppp_phase_network(sp);
4105 log(LOG_INFO, SPP_FMT "chap failure",
4109 sppp_print_string((char*)(h + 1), len - 4);
4113 log(LOG_INFO, SPP_FMT "chap failure\n",
4115 /* await LCP shutdown by authenticator */
4118 /* response is my authproto */
4120 value = 1 + (u_char*)(h+1);
4121 value_len = value[-1];
4122 name = value + value_len;
4123 name_len = len - value_len - 5;
4127 SPP_FMT "chap corrupted response "
4128 "<%s id=0x%x len=%d",
4130 sppp_auth_type_name(PPP_CHAP, h->type),
4131 h->ident, ntohs(h->len));
4132 sppp_print_bytes((u_char*)(h+1), len-4);
4137 if (h->ident != sp->confid[IDX_CHAP]) {
4140 SPP_FMT "chap dropping response for old ID "
4141 "(got %d, expected %d)\n",
4143 h->ident, sp->confid[IDX_CHAP]);
4146 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN)
4147 || bcmp(name, sp->hisauth.name, name_len) != 0) {
4148 log(LOG_INFO, SPP_FMT "chap response, his name ",
4150 sppp_print_string(name, name_len);
4151 log(-1, " != expected ");
4152 sppp_print_string(sp->hisauth.name,
4153 sppp_strnlen(sp->hisauth.name, AUTHNAMELEN));
4157 log(LOG_DEBUG, SPP_FMT "chap input(%s) "
4158 "<%s id=0x%x len=%d name=",
4160 sppp_state_name(sp->state[IDX_CHAP]),
4161 sppp_auth_type_name(PPP_CHAP, h->type),
4162 h->ident, ntohs (h->len));
4163 sppp_print_string((char*)name, name_len);
4164 log(-1, " value-size=%d value=", value_len);
4165 sppp_print_bytes(value, value_len);
4168 if (value_len != AUTHKEYLEN) {
4171 SPP_FMT "chap bad hash value length: "
4172 "%d bytes, should be %d\n",
4173 SPP_ARGS(ifp), value_len,
4179 MD5Update(&ctx, &h->ident, 1);
4180 MD5Update(&ctx, sp->hisauth.secret,
4181 sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN));
4182 MD5Update(&ctx, sp->myauth.challenge, AUTHKEYLEN);
4183 MD5Final(digest, &ctx);
4185 #define FAILMSG "Failed..."
4186 #define SUCCMSG "Welcome!"
4188 if (value_len != sizeof digest ||
4189 bcmp(digest, value, value_len) != 0) {
4190 /* action scn, tld */
4191 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
4192 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4197 /* action sca, perhaps tlu */
4198 if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
4199 sp->state[IDX_CHAP] == STATE_OPENED)
4200 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
4201 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4203 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
4204 sppp_cp_change_state(&chap, sp, STATE_OPENED);
4210 /* Unknown CHAP packet type -- ignore. */
4212 log(LOG_DEBUG, SPP_FMT "chap unknown input(%s) "
4213 "<0x%x id=0x%xh len=%d",
4215 sppp_state_name(sp->state[IDX_CHAP]),
4216 h->type, h->ident, ntohs(h->len));
4217 sppp_print_bytes((u_char*)(h+1), len-4);
4226 sppp_chap_init(struct sppp *sp)
4228 /* Chap doesn't have STATE_INITIAL at all. */
4229 sp->state[IDX_CHAP] = STATE_CLOSED;
4230 sp->fail_counter[IDX_CHAP] = 0;
4231 sp->pp_seq[IDX_CHAP] = 0;
4232 sp->pp_rseq[IDX_CHAP] = 0;
4233 #if defined(__DragonFly__)
4234 callout_init(&sp->timeout[IDX_CHAP]);
4239 sppp_chap_open(struct sppp *sp)
4241 if (sp->myauth.proto == PPP_CHAP &&
4242 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4243 /* we are authenticator for CHAP, start it */
4245 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4246 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4248 /* nothing to be done if we are peer, await a challenge */
4252 sppp_chap_close(struct sppp *sp)
4254 if (sp->state[IDX_CHAP] != STATE_CLOSED)
4255 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4259 sppp_chap_TO(void *cookie)
4261 struct sppp *sp = (struct sppp *)cookie;
4267 log(LOG_DEBUG, SPP_FMT "chap TO(%s) rst_counter = %d\n",
4269 sppp_state_name(sp->state[IDX_CHAP]),
4270 sp->rst_counter[IDX_CHAP]);
4272 if (--sp->rst_counter[IDX_CHAP] < 0)
4274 switch (sp->state[IDX_CHAP]) {
4275 case STATE_REQ_SENT:
4277 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4281 /* TO+ (or TO*) event */
4282 switch (sp->state[IDX_CHAP]) {
4285 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4287 case STATE_REQ_SENT:
4289 /* sppp_cp_change_state() will restart the timer */
4290 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4298 sppp_chap_tlu(struct sppp *sp)
4304 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4307 * Some broken CHAP implementations (Conware CoNet, firmware
4308 * 4.0.?) don't want to re-authenticate their CHAP once the
4309 * initial challenge-response exchange has taken place.
4310 * Provide for an option to avoid rechallenges.
4312 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0) {
4314 * Compute the re-challenge timeout. This will yield
4315 * a number between 300 and 810 seconds.
4317 i = 300 + ((unsigned)(krandom() & 0xff00) >> 7);
4318 callout_reset(&sp->timeout[IDX_CHAP], i * hz, chap.TO, sp);
4323 SPP_FMT "chap %s, ",
4325 sp->pp_phase == PHASE_NETWORK? "reconfirmed": "tlu");
4326 if ((sp->hisauth.flags & AUTHFLAG_NORECHALLENGE) == 0)
4327 log(-1, "next re-challenge in %d seconds\n", i);
4329 log(-1, "re-challenging suppressed\n");
4334 /* indicate to LCP that we need to be closed down */
4335 sp->lcp.protos |= (1 << IDX_CHAP);
4337 if (sp->pp_flags & PP_NEEDAUTH) {
4339 * Remote is authenticator, but his auth proto didn't
4340 * complete yet. Defer the transition to network
4350 * If we are already in phase network, we are done here. This
4351 * is the case if this is a dummy tlu event after a re-challenge.
4353 if (sp->pp_phase != PHASE_NETWORK)
4354 sppp_phase_network(sp);
4358 sppp_chap_tld(struct sppp *sp)
4363 log(LOG_DEBUG, SPP_FMT "chap tld\n", SPP_ARGS(ifp));
4364 callout_stop(&sp->timeout[IDX_CHAP]);
4365 sp->lcp.protos &= ~(1 << IDX_CHAP);
4371 sppp_chap_scr(struct sppp *sp)
4376 /* Compute random challenge. */
4377 ch = (u_long *)sp->myauth.challenge;
4378 #if defined(__DragonFly__)
4379 read_random(&seed, sizeof seed);
4384 seed = tv.tv_sec ^ tv.tv_usec;
4387 ch[0] = seed ^ krandom();
4388 ch[1] = seed ^ krandom();
4389 ch[2] = seed ^ krandom();
4390 ch[3] = seed ^ krandom();
4393 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP];
4395 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
4396 sizeof clen, (const char *)&clen,
4397 (size_t)AUTHKEYLEN, sp->myauth.challenge,
4398 (size_t)sppp_strnlen(sp->myauth.name, AUTHNAMELEN),
4404 *--------------------------------------------------------------------------*
4406 * The PAP implementation. *
4408 *--------------------------------------------------------------------------*
4411 * For PAP, we need to keep a little state also if we are the peer, not the
4412 * authenticator. This is since we don't get a request to authenticate, but
4413 * have to repeatedly authenticate ourself until we got a response (or the
4414 * retry counter is expired).
4418 * Handle incoming PAP packets. */
4420 sppp_pap_input(struct sppp *sp, struct mbuf *m)
4423 struct lcp_header *h;
4425 u_char *name, *passwd, mlen;
4426 int name_len, passwd_len;
4429 * Malicious input might leave this uninitialized, so
4430 * init to an impossible value.
4434 len = m->m_pkthdr.len;
4438 SPP_FMT "pap invalid packet length: %d bytes\n",
4439 SPP_ARGS(ifp), len);
4442 h = mtod (m, struct lcp_header*);
4443 if (len > ntohs (h->len))
4444 len = ntohs (h->len);
4446 /* PAP request is my authproto */
4448 name = 1 + (u_char*)(h+1);
4449 name_len = name[-1];
4450 passwd = name + name_len + 1;
4451 if (name_len > len - 6 ||
4452 (passwd_len = passwd[-1]) > len - 6 - name_len) {
4454 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4455 "<%s id=0x%x len=%d",
4457 sppp_auth_type_name(PPP_PAP, h->type),
4458 h->ident, ntohs(h->len));
4459 sppp_print_bytes((u_char*)(h+1), len-4);
4465 log(LOG_DEBUG, SPP_FMT "pap input(%s) "
4466 "<%s id=0x%x len=%d name=",
4468 sppp_state_name(sp->state[IDX_PAP]),
4469 sppp_auth_type_name(PPP_PAP, h->type),
4470 h->ident, ntohs(h->len));
4471 sppp_print_string((char*)name, name_len);
4472 log(-1, " passwd=");
4473 sppp_print_string((char*)passwd, passwd_len);
4476 if (name_len != sppp_strnlen(sp->hisauth.name, AUTHNAMELEN) ||
4477 passwd_len != sppp_strnlen(sp->hisauth.secret, AUTHKEYLEN) ||
4478 bcmp(name, sp->hisauth.name, name_len) != 0 ||
4479 bcmp(passwd, sp->hisauth.secret, passwd_len) != 0) {
4480 /* action scn, tld */
4481 mlen = sizeof(FAILMSG) - 1;
4482 sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
4483 sizeof mlen, (const char *)&mlen,
4484 sizeof(FAILMSG) - 1, (u_char *)FAILMSG,
4489 /* action sca, perhaps tlu */
4490 if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
4491 sp->state[IDX_PAP] == STATE_OPENED) {
4492 mlen = sizeof(SUCCMSG) - 1;
4493 sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
4494 sizeof mlen, (const char *)&mlen,
4495 sizeof(SUCCMSG) - 1, (u_char *)SUCCMSG,
4498 if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
4499 sppp_cp_change_state(&pap, sp, STATE_OPENED);
4504 /* ack and nak are his authproto */
4506 callout_stop(&sp->pap_my_to);
4508 log(LOG_DEBUG, SPP_FMT "pap success",
4510 name = 1 + (u_char *)(h + 1);
4511 name_len = name[-1];
4512 if (len > 5 && name_len < len+4) {
4514 sppp_print_string(name, name_len);
4521 sp->pp_flags &= ~PP_NEEDAUTH;
4522 if (sp->myauth.proto == PPP_PAP &&
4523 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4524 (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
4526 * We are authenticator for PAP but didn't
4527 * complete yet. Leave it to tlu to proceed
4538 sppp_phase_network(sp);
4542 callout_stop(&sp->pap_my_to);
4544 log(LOG_INFO, SPP_FMT "pap failure",
4546 name = 1 + (u_char *)(h + 1);
4547 name_len = name[-1];
4548 if (len > 5 && name_len < len+4) {
4550 sppp_print_string(name, name_len);
4554 log(LOG_INFO, SPP_FMT "pap failure\n",
4556 /* await LCP shutdown by authenticator */
4560 /* Unknown PAP packet type -- ignore. */
4562 log(LOG_DEBUG, SPP_FMT "pap corrupted input "
4563 "<0x%x id=0x%x len=%d",
4565 h->type, h->ident, ntohs(h->len));
4566 sppp_print_bytes((u_char*)(h+1), len-4);
4575 sppp_pap_init(struct sppp *sp)
4577 /* PAP doesn't have STATE_INITIAL at all. */
4578 sp->state[IDX_PAP] = STATE_CLOSED;
4579 sp->fail_counter[IDX_PAP] = 0;
4580 sp->pp_seq[IDX_PAP] = 0;
4581 sp->pp_rseq[IDX_PAP] = 0;
4582 #if defined(__DragonFly__)
4583 callout_init(&sp->timeout[IDX_PAP]);
4584 callout_init(&sp->pap_my_to);
4589 sppp_pap_open(struct sppp *sp)
4591 if (sp->hisauth.proto == PPP_PAP &&
4592 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4593 /* we are authenticator for PAP, start our timer */
4594 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4595 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4597 if (sp->myauth.proto == PPP_PAP) {
4598 /* we are peer, send a request, and start a timer */
4600 callout_reset(&sp->pap_my_to, sp->lcp.timeout,
4601 sppp_pap_my_TO, sp);
4606 sppp_pap_close(struct sppp *sp)
4608 if (sp->state[IDX_PAP] != STATE_CLOSED)
4609 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4613 * That's the timeout routine if we are authenticator. Since the
4614 * authenticator is basically passive in PAP, we can't do much here.
4617 sppp_pap_TO(void *cookie)
4619 struct sppp *sp = (struct sppp *)cookie;
4625 log(LOG_DEBUG, SPP_FMT "pap TO(%s) rst_counter = %d\n",
4627 sppp_state_name(sp->state[IDX_PAP]),
4628 sp->rst_counter[IDX_PAP]);
4630 if (--sp->rst_counter[IDX_PAP] < 0)
4632 switch (sp->state[IDX_PAP]) {
4633 case STATE_REQ_SENT:
4635 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4639 /* TO+ event, not very much we could do */
4640 switch (sp->state[IDX_PAP]) {
4641 case STATE_REQ_SENT:
4642 /* sppp_cp_change_state() will restart the timer */
4643 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4651 * That's the timeout handler if we are peer. Since the peer is active,
4652 * we need to retransmit our PAP request since it is apparently lost.
4653 * XXX We should impose a max counter.
4656 sppp_pap_my_TO(void *cookie)
4658 struct sppp *sp = (struct sppp *)cookie;
4662 log(LOG_DEBUG, SPP_FMT "pap peer TO\n",
4669 sppp_pap_tlu(struct sppp *sp)
4673 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4676 log(LOG_DEBUG, SPP_FMT "%s tlu\n",
4677 SPP_ARGS(ifp), pap.name);
4681 /* indicate to LCP that we need to be closed down */
4682 sp->lcp.protos |= (1 << IDX_PAP);
4684 if (sp->pp_flags & PP_NEEDAUTH) {
4686 * Remote is authenticator, but his auth proto didn't
4687 * complete yet. Defer the transition to network
4694 sppp_phase_network(sp);
4698 sppp_pap_tld(struct sppp *sp)
4703 log(LOG_DEBUG, SPP_FMT "pap tld\n", SPP_ARGS(ifp));
4704 callout_stop(&sp->timeout[IDX_PAP]);
4705 callout_stop(&sp->pap_my_to);
4706 sp->lcp.protos &= ~(1 << IDX_PAP);
4712 sppp_pap_scr(struct sppp *sp)
4714 u_char idlen, pwdlen;
4716 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP];
4717 pwdlen = sppp_strnlen(sp->myauth.secret, AUTHKEYLEN);
4718 idlen = sppp_strnlen(sp->myauth.name, AUTHNAMELEN);
4720 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
4721 sizeof idlen, (const char *)&idlen,
4722 (size_t)idlen, sp->myauth.name,
4723 sizeof pwdlen, (const char *)&pwdlen,
4724 (size_t)pwdlen, sp->myauth.secret,
4729 * Random miscellaneous functions.
4733 * Send a PAP or CHAP proto packet.
4735 * Varadic function, each of the elements for the ellipsis is of type
4736 * ``size_t mlen, const u_char *msg''. Processing will stop iff
4738 * NOTE: never declare variadic functions with types subject to type
4739 * promotion (i.e. u_char). This is asking for big trouble depending
4740 * on the architecture you are on...
4744 sppp_auth_send(const struct cp *cp, struct sppp *sp,
4745 unsigned int type, unsigned int id,
4749 struct ppp_header *h;
4750 struct lcp_header *lh;
4758 MGETHDR (m, MB_DONTWAIT, MT_DATA);
4761 m->m_pkthdr.rcvif = 0;
4763 h = mtod (m, struct ppp_header*);
4764 h->address = PPP_ALLSTATIONS; /* broadcast address */
4765 h->control = PPP_UI; /* Unnumbered Info */
4766 h->protocol = htons(cp->proto);
4768 lh = (struct lcp_header*)(h + 1);
4771 p = (u_char*) (lh+1);
4776 while ((mlen = (unsigned int)__va_arg(ap, size_t)) != 0) {
4777 msg = __va_arg(ap, const char *);
4779 if (len > MHLEN - PPP_HEADER_LEN - LCP_HEADER_LEN) {
4785 bcopy(msg, p, mlen);
4790 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + LCP_HEADER_LEN + len;
4791 lh->len = htons (LCP_HEADER_LEN + len);
4794 log(LOG_DEBUG, SPP_FMT "%s output <%s id=0x%x len=%d",
4795 SPP_ARGS(ifp), cp->name,
4796 sppp_auth_type_name(cp->proto, lh->type),
4797 lh->ident, ntohs(lh->len));
4798 sppp_print_bytes((u_char*) (lh+1), len);
4801 if (IF_QFULL (&sp->pp_cpq)) {
4802 IF_DROP (&sp->pp_fastq);
4803 IF_DROP (&ifp->if_snd);
4807 IF_ENQUEUE (&sp->pp_cpq, m);
4808 if (! (ifp->if_flags & IFF_OACTIVE))
4809 (*ifp->if_start) (ifp);
4810 ifp->if_obytes += m->m_pkthdr.len + 3;
4814 * Send keepalive packets, every 10 seconds.
4817 sppp_keepalive(void *dummy)
4823 for (sp=spppq; sp; sp=sp->pp_next) {
4824 struct ifnet *ifp = &sp->pp_if;
4826 /* Keepalive mode disabled or channel down? */
4827 if (! (sp->pp_flags & PP_KEEPALIVE) ||
4828 ! (ifp->if_flags & IFF_RUNNING))
4831 /* No keepalive in PPP mode if LCP not opened yet. */
4832 if (sp->pp_mode != IFF_CISCO &&
4833 sp->pp_phase < PHASE_AUTHENTICATE)
4836 if (sp->pp_alivecnt == MAXALIVECNT) {
4837 /* No keepalive packets got. Stop the interface. */
4838 kprintf (SPP_FMT "down\n", SPP_ARGS(ifp));
4840 IF_DRAIN(&sp->pp_cpq);
4841 if (sp->pp_mode != IFF_CISCO) {
4843 /* Shut down the PPP link. */
4845 /* Initiate negotiation. XXX */
4849 lwkt_serialize_enter(ifp->if_serializer);
4850 if (sp->pp_alivecnt <= MAXALIVECNT)
4852 if (sp->pp_mode == IFF_CISCO)
4853 sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ,
4854 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]);
4855 else if (sp->pp_phase >= PHASE_AUTHENTICATE) {
4856 long nmagic = htonl (sp->lcp.magic);
4857 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP];
4858 sppp_cp_send (sp, PPP_LCP, ECHO_REQ,
4859 sp->lcp.echoid, 4, &nmagic);
4861 lwkt_serialize_exit(ifp->if_serializer);
4863 callout_reset(&keepalive_timeout, hz * 10, sppp_keepalive, NULL);
4868 * Get both IP addresses.
4871 sppp_get_ip_addrs(struct sppp *sp, u_long *src, u_long *dst, u_long *srcmask)
4873 struct ifnet *ifp = &sp->pp_if;
4874 struct ifaddr_container *ifac;
4876 struct sockaddr_in *si, *sm;
4882 * Pick the first AF_INET address from the list,
4883 * aliases don't make any sense on a p2p link anyway.
4886 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
4888 if (ifa->ifa_addr->sa_family == AF_INET) {
4889 si = (struct sockaddr_in *)ifa->ifa_addr;
4890 sm = (struct sockaddr_in *)ifa->ifa_netmask;
4896 if (si && si->sin_addr.s_addr) {
4897 ssrc = si->sin_addr.s_addr;
4899 *srcmask = ntohl(sm->sin_addr.s_addr);
4902 si = (struct sockaddr_in *)ifa->ifa_dstaddr;
4903 if (si && si->sin_addr.s_addr)
4904 ddst = si->sin_addr.s_addr;
4907 if (dst) *dst = ntohl(ddst);
4908 if (src) *src = ntohl(ssrc);
4912 * Set my IP address. Must be called at splimp.
4915 sppp_set_ip_addr(struct sppp *sp, u_long src)
4918 struct ifaddr_container *ifac;
4919 struct ifaddr *ifa = NULL;
4920 struct sockaddr_in *si;
4921 struct in_ifaddr *ia;
4924 * Pick the first AF_INET address from the list,
4925 * aliases don't make any sense on a p2p link anyway.
4928 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
4930 if (ifa->ifa_addr->sa_family == AF_INET) {
4931 si = (struct sockaddr_in *)ifa->ifa_addr;
4937 if (ifac != NULL && si != NULL) {
4939 #if __NetBSD_Version__ >= 103080000
4940 struct sockaddr_in new_sin = *si;
4942 new_sin.sin_addr.s_addr = htonl(src);
4943 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 1);
4946 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: in_ifinit "
4947 " failed, error=%d\n", SPP_ARGS(ifp), error);
4950 /* delete old route */
4951 error = rtinit(ifa, (int)RTM_DELETE, RTF_HOST);
4954 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit DEL failed, error=%d\n",
4955 SPP_ARGS(ifp), error);
4959 in_iahash_remove(ia);
4961 /* set new address */
4962 si->sin_addr.s_addr = htonl(src);
4963 in_iahash_insert(ia);
4966 error = rtinit(ifa, (int)RTM_ADD, RTF_HOST);
4969 log(LOG_DEBUG, SPP_FMT "sppp_set_ip_addr: rtinit ADD failed, error=%d",
4970 SPP_ARGS(ifp), error);
4978 * Get both IPv6 addresses.
4981 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst,
4982 struct in6_addr *srcmask)
4984 struct ifnet *ifp = &sp->pp_if;
4985 struct ifaddr_container *ifac;
4987 struct sockaddr_in6 *si, *sm;
4988 struct in6_addr ssrc, ddst;
4991 bzero(&ssrc, sizeof(ssrc));
4992 bzero(&ddst, sizeof(ddst));
4994 * Pick the first link-local AF_INET6 address from the list,
4995 * aliases don't make any sense on a p2p link anyway.
4998 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
5000 if (ifa->ifa_addr->sa_family == AF_INET6) {
5001 si = (struct sockaddr_in6 *)ifa->ifa_addr;
5002 sm = (struct sockaddr_in6 *)ifa->ifa_netmask;
5003 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr))
5008 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) {
5009 bcopy(&si->sin6_addr, &ssrc, sizeof(ssrc));
5011 bcopy(&sm->sin6_addr, srcmask,
5016 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
5017 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr))
5018 bcopy(&si->sin6_addr, &ddst, sizeof(ddst));
5022 bcopy(&ddst, dst, sizeof(*dst));
5024 bcopy(&ssrc, src, sizeof(*src));
5027 #ifdef IPV6CP_MYIFID_DYN
5029 * Generate random ifid.
5032 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr)
5038 * Set my IPv6 address. Must be called at splimp.
5041 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src)
5044 struct ifaddr_container *ifac;
5046 struct sockaddr_in6 *sin6;
5049 * Pick the first link-local AF_INET6 address from the list,
5050 * aliases don't make any sense on a p2p link anyway.
5054 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
5056 if (ifa->ifa_addr->sa_family == AF_INET6) {
5057 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
5058 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
5063 if (ifac != NULL && sin6 != NULL) {
5065 struct sockaddr_in6 new_sin6 = *sin6;
5067 bcopy(src, &new_sin6.sin6_addr, sizeof(new_sin6.sin6_addr));
5068 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1);
5069 if (debug && error) {
5070 log(LOG_DEBUG, SPP_FMT "sppp_set_ip6_addr: in6_ifinit "
5071 " failed, error=%d\n", SPP_ARGS(ifp), error);
5078 * Suggest a candidate address to be used by peer.
5081 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest)
5083 struct in6_addr myaddr;
5086 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
5088 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */
5090 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) {
5091 myaddr.s6_addr[14] ^= 0xff;
5092 myaddr.s6_addr[15] ^= 0xff;
5094 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff);
5095 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff);
5098 bcopy(&myaddr, suggest, sizeof(myaddr));
5103 sppp_params(struct sppp *sp, u_long cmd, void *data)
5106 struct ifreq *ifr = (struct ifreq *)data;
5107 struct spppreq *spr;
5110 spr = kmalloc(sizeof(struct spppreq), M_TEMP, M_INTWAIT);
5113 * ifr->ifr_data is supposed to point to a struct spppreq.
5114 * Check the cmd word first before attempting to fetch all the
5117 if ((subcmd = fuword(ifr->ifr_data)) == -1) {
5122 if (copyin((caddr_t)ifr->ifr_data, spr, sizeof(struct spppreq)) != 0) {
5128 case (int)SPPPIOGDEFS:
5129 if (cmd != SIOCGIFGENERIC) {
5134 * We copy over the entire current state, but clean
5135 * out some of the stuff we don't wanna pass up.
5136 * Remember, SIOCGIFGENERIC is unprotected, and can be
5137 * called by any user. No need to ever get PAP or
5138 * CHAP secrets back to userland anyway.
5140 spr->defs.pp_phase = sp->pp_phase;
5141 spr->defs.enable_vj = (sp->confflags & CONF_ENABLE_VJ) != 0;
5142 spr->defs.enable_ipv6 = (sp->confflags & CONF_ENABLE_IPV6) != 0;
5143 spr->defs.lcp = sp->lcp;
5144 spr->defs.ipcp = sp->ipcp;
5145 spr->defs.ipv6cp = sp->ipv6cp;
5146 spr->defs.myauth = sp->myauth;
5147 spr->defs.hisauth = sp->hisauth;
5148 bzero(spr->defs.myauth.secret, AUTHKEYLEN);
5149 bzero(spr->defs.myauth.challenge, AUTHKEYLEN);
5150 bzero(spr->defs.hisauth.secret, AUTHKEYLEN);
5151 bzero(spr->defs.hisauth.challenge, AUTHKEYLEN);
5153 * Fixup the LCP timeout value to milliseconds so
5154 * spppcontrol doesn't need to bother about the value
5155 * of "hz". We do the reverse calculation below when
5158 spr->defs.lcp.timeout = sp->lcp.timeout * 1000 / hz;
5159 rv = copyout(spr, (caddr_t)ifr->ifr_data,
5160 sizeof(struct spppreq));
5163 case (int)SPPPIOSDEFS:
5164 if (cmd != SIOCSIFGENERIC) {
5169 * We have a very specific idea of which fields we
5170 * allow being passed back from userland, so to not
5171 * clobber our current state. For one, we only allow
5172 * setting anything if LCP is in dead or establish
5173 * phase. Once the authentication negotiations
5174 * started, the authentication settings must not be
5175 * changed again. (The administrator can force an
5176 * ifconfig down in order to get LCP back into dead
5179 * Also, we only allow for authentication parameters to be
5182 * XXX Should allow to set or clear pp_flags.
5184 * Finally, if the respective authentication protocol to
5185 * be used is set differently than 0, but the secret is
5186 * passed as all zeros, we don't trash the existing secret.
5187 * This allows an administrator to change the system name
5188 * only without clobbering the secret (which he didn't get
5189 * back in a previous SPPPIOGDEFS call). However, the
5190 * secrets are cleared if the authentication protocol is
5192 if (sp->pp_phase != PHASE_DEAD &&
5193 sp->pp_phase != PHASE_ESTABLISH) {
5198 if ((spr->defs.myauth.proto != 0 && spr->defs.myauth.proto != PPP_PAP &&
5199 spr->defs.myauth.proto != PPP_CHAP) ||
5200 (spr->defs.hisauth.proto != 0 && spr->defs.hisauth.proto != PPP_PAP &&
5201 spr->defs.hisauth.proto != PPP_CHAP)) {
5206 if (spr->defs.myauth.proto == 0)
5207 /* resetting myauth */
5208 bzero(&sp->myauth, sizeof sp->myauth);
5210 /* setting/changing myauth */
5211 sp->myauth.proto = spr->defs.myauth.proto;
5212 bcopy(spr->defs.myauth.name, sp->myauth.name, AUTHNAMELEN);
5213 if (spr->defs.myauth.secret[0] != '\0')
5214 bcopy(spr->defs.myauth.secret, sp->myauth.secret,
5217 if (spr->defs.hisauth.proto == 0)
5218 /* resetting hisauth */
5219 bzero(&sp->hisauth, sizeof sp->hisauth);
5221 /* setting/changing hisauth */
5222 sp->hisauth.proto = spr->defs.hisauth.proto;
5223 sp->hisauth.flags = spr->defs.hisauth.flags;
5224 bcopy(spr->defs.hisauth.name, sp->hisauth.name, AUTHNAMELEN);
5225 if (spr->defs.hisauth.secret[0] != '\0')
5226 bcopy(spr->defs.hisauth.secret, sp->hisauth.secret,
5229 /* set LCP restart timer timeout */
5230 if (spr->defs.lcp.timeout != 0)
5231 sp->lcp.timeout = spr->defs.lcp.timeout * hz / 1000;
5232 /* set VJ enable and IPv6 disable flags */
5234 if (spr->defs.enable_vj)
5235 sp->confflags |= CONF_ENABLE_VJ;
5237 sp->confflags &= ~CONF_ENABLE_VJ;
5240 if (spr->defs.enable_ipv6)
5241 sp->confflags |= CONF_ENABLE_IPV6;
5243 sp->confflags &= ~CONF_ENABLE_IPV6;
5258 sppp_phase_network(struct sppp *sp)
5264 sp->pp_phase = PHASE_NETWORK;
5267 log(LOG_DEBUG, SPP_FMT "phase %s\n", SPP_ARGS(ifp),
5268 sppp_phase_name(sp->pp_phase));
5270 /* Notify NCPs now. */
5271 for (i = 0; i < IDX_COUNT; i++)
5272 if ((cps[i])->flags & CP_NCP)
5275 /* Send Up events to all NCPs. */
5276 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
5277 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP))
5280 /* if no NCP is starting, all this was in vain, close down */
5281 sppp_lcp_check_and_close(sp);
5286 sppp_cp_type_name(u_char type)
5288 static char buf[12];
5290 case CONF_REQ: return "conf-req";
5291 case CONF_ACK: return "conf-ack";
5292 case CONF_NAK: return "conf-nak";
5293 case CONF_REJ: return "conf-rej";
5294 case TERM_REQ: return "term-req";
5295 case TERM_ACK: return "term-ack";
5296 case CODE_REJ: return "code-rej";
5297 case PROTO_REJ: return "proto-rej";
5298 case ECHO_REQ: return "echo-req";
5299 case ECHO_REPLY: return "echo-reply";
5300 case DISC_REQ: return "discard-req";
5302 ksnprintf (buf, sizeof(buf), "cp/0x%x", type);
5307 sppp_auth_type_name(u_short proto, u_char type)
5309 static char buf[12];
5313 case CHAP_CHALLENGE: return "challenge";
5314 case CHAP_RESPONSE: return "response";
5315 case CHAP_SUCCESS: return "success";
5316 case CHAP_FAILURE: return "failure";
5320 case PAP_REQ: return "req";
5321 case PAP_ACK: return "ack";
5322 case PAP_NAK: return "nak";
5325 ksnprintf (buf, sizeof(buf), "auth/0x%x", type);
5330 sppp_lcp_opt_name(u_char opt)
5332 static char buf[12];
5334 case LCP_OPT_MRU: return "mru";
5335 case LCP_OPT_ASYNC_MAP: return "async-map";
5336 case LCP_OPT_AUTH_PROTO: return "auth-proto";
5337 case LCP_OPT_QUAL_PROTO: return "qual-proto";
5338 case LCP_OPT_MAGIC: return "magic";
5339 case LCP_OPT_PROTO_COMP: return "proto-comp";
5340 case LCP_OPT_ADDR_COMP: return "addr-comp";
5342 ksnprintf (buf, sizeof(buf), "lcp/0x%x", opt);
5347 sppp_ipcp_opt_name(u_char opt)
5349 static char buf[12];
5351 case IPCP_OPT_ADDRESSES: return "addresses";
5352 case IPCP_OPT_COMPRESSION: return "compression";
5353 case IPCP_OPT_ADDRESS: return "address";
5355 ksnprintf (buf, sizeof(buf), "ipcp/0x%x", opt);
5361 sppp_ipv6cp_opt_name(u_char opt)
5363 static char buf[12];
5365 case IPV6CP_OPT_IFID: return "ifid";
5366 case IPV6CP_OPT_COMPRESSION: return "compression";
5368 ksprintf (buf, "0x%x", opt);
5374 sppp_state_name(int state)
5377 case STATE_INITIAL: return "initial";
5378 case STATE_STARTING: return "starting";
5379 case STATE_CLOSED: return "closed";
5380 case STATE_STOPPED: return "stopped";
5381 case STATE_CLOSING: return "closing";
5382 case STATE_STOPPING: return "stopping";
5383 case STATE_REQ_SENT: return "req-sent";
5384 case STATE_ACK_RCVD: return "ack-rcvd";
5385 case STATE_ACK_SENT: return "ack-sent";
5386 case STATE_OPENED: return "opened";
5392 sppp_phase_name(enum ppp_phase phase)
5395 case PHASE_DEAD: return "dead";
5396 case PHASE_ESTABLISH: return "establish";
5397 case PHASE_TERMINATE: return "terminate";
5398 case PHASE_AUTHENTICATE: return "authenticate";
5399 case PHASE_NETWORK: return "network";
5405 sppp_proto_name(u_short proto)
5407 static char buf[12];
5409 case PPP_LCP: return "lcp";
5410 case PPP_IPCP: return "ipcp";
5411 case PPP_PAP: return "pap";
5412 case PPP_CHAP: return "chap";
5413 case PPP_IPV6CP: return "ipv6cp";
5415 ksnprintf(buf, sizeof(buf), "proto/0x%x", (unsigned)proto);
5420 sppp_print_bytes(const u_char *p, u_short len)
5423 log(-1, " %*D", len, p, "-");
5427 sppp_print_string(const char *p, u_short len)
5434 * Print only ASCII chars directly. RFC 1994 recommends
5435 * using only them, but we don't rely on it. */
5436 if (c < ' ' || c > '~')
5437 log(-1, "\\x%x", c);
5444 sppp_dotted_quad(u_long addr)
5447 ksprintf(s, "%d.%d.%d.%d",
5448 (int)((addr >> 24) & 0xff),
5449 (int)((addr >> 16) & 0xff),
5450 (int)((addr >> 8) & 0xff),
5451 (int)(addr & 0xff));
5456 sppp_strnlen(u_char *p, int max)
5460 for (len = 0; len < max && *p; ++p)
5465 /* a dummy, used to drop uninteresting events */
5467 sppp_null(struct sppp *unused)
5469 /* do just nothing */