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[netbsd-mini2440.git] / sys / net / if_spppsubr.c
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1 /* $NetBSD: if_spppsubr.c,v 1.117 2009/03/18 17:06:51 cegger Exp $ */
2
3 /*
4 * Synchronous PPP/Cisco link level subroutines.
5 * Keepalive protocol implemented in both Cisco and PPP modes.
6 *
7 * Copyright (C) 1994-1996 Cronyx Engineering Ltd.
8 * Author: Serge Vakulenko, <vak@cronyx.ru>
9 *
10 * Heavily revamped to conform to RFC 1661.
11 * Copyright (C) 1997, Joerg Wunsch.
12 *
13 * RFC2472 IPv6CP support.
14 * Copyright (C) 2000, Jun-ichiro itojun Hagino <itojun@iijlab.net>.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions are met:
18 * 1. Redistributions of source code must retain the above copyright notice,
19 * this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright notice,
21 * this list of conditions and the following disclaimer in the documentation
22 * and/or other materials provided with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY
25 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE
28 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 *
36 * From: Version 2.4, Thu Apr 30 17:17:21 MSD 1997
37 *
38 * From: if_spppsubr.c,v 1.39 1998/04/04 13:26:03 phk Exp
39 *
40 * From: Id: if_spppsubr.c,v 1.23 1999/02/23 14:47:50 hm Exp
41 */
42
43 #include <sys/cdefs.h>
44 __KERNEL_RCSID(0, "$NetBSD: if_spppsubr.c,v 1.117 2009/03/18 17:06:51 cegger Exp $");
45
46 #include "opt_inet.h"
47 #include "opt_ipx.h"
48 #include "opt_iso.h"
49 #include "opt_pfil_hooks.h"
50
51 #include <sys/param.h>
52 #include <sys/proc.h>
53 #include <sys/systm.h>
54 #include <sys/kernel.h>
55 #include <sys/sockio.h>
56 #include <sys/socket.h>
57 #include <sys/syslog.h>
58 #include <sys/malloc.h>
59 #include <sys/mbuf.h>
60 #include <sys/callout.h>
61 #include <sys/md5.h>
62 #include <sys/inttypes.h>
63 #include <sys/kauth.h>
64
65 #include <net/if.h>
66 #include <net/netisr.h>
67 #include <net/if_types.h>
68 #include <net/route.h>
69 #include <net/ppp_defs.h>
70
71 #include <machine/stdarg.h>
72
73 #include <netinet/in.h>
74 #include <netinet/in_systm.h>
75 #include <netinet/in_var.h>
76 #ifdef INET
77 #include <netinet/ip.h>
78 #include <netinet/tcp.h>
79 #endif
80 #include <net/ethertypes.h>
81
82 #ifdef INET6
83 #include <netinet6/scope6_var.h>
84 #endif
85
86 #ifdef IPX
87 #include <netipx/ipx.h>
88 #include <netipx/ipx_if.h>
89 #endif
90
91
92 #ifdef ISO
93 #include <netiso/argo_debug.h>
94 #include <netiso/iso.h>
95 #include <netiso/iso_var.h>
96 #include <netiso/iso_snpac.h>
97 #endif
98
99 #include <net/if_sppp.h>
100 #include <net/if_spppvar.h>
101
102 #define LCP_KEEPALIVE_INTERVAL 10 /* seconds between checks */
103 #define LOOPALIVECNT 3 /* loopback detection tries */
104 #define DEFAULT_MAXALIVECNT 3 /* max. missed alive packets */
105 #define DEFAULT_NORECV_TIME 15 /* before we get worried */
106 #define DEFAULT_MAX_AUTH_FAILURES 5 /* max. auth. failures */
107
108 /*
109 * Interface flags that can be set in an ifconfig command.
110 *
111 * Setting link0 will make the link passive, i.e. it will be marked
112 * as being administrative openable, but won't be opened to begin
113 * with. Incoming calls will be answered, or subsequent calls with
114 * -link1 will cause the administrative open of the LCP layer.
115 *
116 * Setting link1 will cause the link to auto-dial only as packets
117 * arrive to be sent.
118 *
119 * Setting IFF_DEBUG will syslog the option negotiation and state
120 * transitions at level kern.debug. Note: all logs consistently look
121 * like
122 *
123 * <if-name><unit>: <proto-name> <additional info...>
124 *
125 * with <if-name><unit> being something like "bppp0", and <proto-name>
126 * being one of "lcp", "ipcp", "cisco", "chap", "pap", etc.
127 */
128
129 #define IFF_PASSIVE IFF_LINK0 /* wait passively for connection */
130 #define IFF_AUTO IFF_LINK1 /* auto-dial on output */
131
132 #define CONF_REQ 1 /* PPP configure request */
133 #define CONF_ACK 2 /* PPP configure acknowledge */
134 #define CONF_NAK 3 /* PPP configure negative ack */
135 #define CONF_REJ 4 /* PPP configure reject */
136 #define TERM_REQ 5 /* PPP terminate request */
137 #define TERM_ACK 6 /* PPP terminate acknowledge */
138 #define CODE_REJ 7 /* PPP code reject */
139 #define PROTO_REJ 8 /* PPP protocol reject */
140 #define ECHO_REQ 9 /* PPP echo request */
141 #define ECHO_REPLY 10 /* PPP echo reply */
142 #define DISC_REQ 11 /* PPP discard request */
143
144 #define LCP_OPT_MRU 1 /* maximum receive unit */
145 #define LCP_OPT_ASYNC_MAP 2 /* async control character map */
146 #define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */
147 #define LCP_OPT_QUAL_PROTO 4 /* quality protocol */
148 #define LCP_OPT_MAGIC 5 /* magic number */
149 #define LCP_OPT_RESERVED 6 /* reserved */
150 #define LCP_OPT_PROTO_COMP 7 /* protocol field compression */
151 #define LCP_OPT_ADDR_COMP 8 /* address/control field compression */
152
153 #define IPCP_OPT_ADDRESSES 1 /* both IP addresses; deprecated */
154 #define IPCP_OPT_COMPRESSION 2 /* IP compression protocol */
155 #define IPCP_OPT_ADDRESS 3 /* local IP address */
156 #define IPCP_OPT_PRIMDNS 129 /* primary remote dns address */
157 #define IPCP_OPT_SECDNS 131 /* secondary remote dns address */
158
159 #define IPV6CP_OPT_IFID 1 /* interface identifier */
160 #define IPV6CP_OPT_COMPRESSION 2 /* IPv6 compression protocol */
161
162 #define PAP_REQ 1 /* PAP name/password request */
163 #define PAP_ACK 2 /* PAP acknowledge */
164 #define PAP_NAK 3 /* PAP fail */
165
166 #define CHAP_CHALLENGE 1 /* CHAP challenge request */
167 #define CHAP_RESPONSE 2 /* CHAP challenge response */
168 #define CHAP_SUCCESS 3 /* CHAP response ok */
169 #define CHAP_FAILURE 4 /* CHAP response failed */
170
171 #define CHAP_MD5 5 /* hash algorithm - MD5 */
172
173 #define CISCO_MULTICAST 0x8f /* Cisco multicast address */
174 #define CISCO_UNICAST 0x0f /* Cisco unicast address */
175 #define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
176 #define CISCO_ADDR_REQ 0 /* Cisco address request */
177 #define CISCO_ADDR_REPLY 1 /* Cisco address reply */
178 #define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
179
180 /* states are named and numbered according to RFC 1661 */
181 #define STATE_INITIAL 0
182 #define STATE_STARTING 1
183 #define STATE_CLOSED 2
184 #define STATE_STOPPED 3
185 #define STATE_CLOSING 4
186 #define STATE_STOPPING 5
187 #define STATE_REQ_SENT 6
188 #define STATE_ACK_RCVD 7
189 #define STATE_ACK_SENT 8
190 #define STATE_OPENED 9
191
192 struct ppp_header {
193 uint8_t address;
194 uint8_t control;
195 uint16_t protocol;
196 } __packed;
197 #define PPP_HEADER_LEN sizeof (struct ppp_header)
198
199 struct lcp_header {
200 uint8_t type;
201 uint8_t ident;
202 uint16_t len;
203 } __packed;
204 #define LCP_HEADER_LEN sizeof (struct lcp_header)
205
206 struct cisco_packet {
207 uint32_t type;
208 uint32_t par1;
209 uint32_t par2;
210 uint16_t rel;
211 uint16_t time0;
212 uint16_t time1;
213 } __packed;
214 #define CISCO_PACKET_LEN 18
215
216 /*
217 * We follow the spelling and capitalization of RFC 1661 here, to make
218 * it easier comparing with the standard. Please refer to this RFC in
219 * case you can't make sense out of these abbreviation; it will also
220 * explain the semantics related to the various events and actions.
221 */
222 struct cp {
223 u_short proto; /* PPP control protocol number */
224 u_char protoidx; /* index into state table in struct sppp */
225 u_char flags;
226 #define CP_LCP 0x01 /* this is the LCP */
227 #define CP_AUTH 0x02 /* this is an authentication protocol */
228 #define CP_NCP 0x04 /* this is a NCP */
229 #define CP_QUAL 0x08 /* this is a quality reporting protocol */
230 const char *name; /* name of this control protocol */
231 /* event handlers */
232 void (*Up)(struct sppp *sp);
233 void (*Down)(struct sppp *sp);
234 void (*Open)(struct sppp *sp);
235 void (*Close)(struct sppp *sp);
236 void (*TO)(void *sp);
237 int (*RCR)(struct sppp *sp, struct lcp_header *h, int len);
238 void (*RCN_rej)(struct sppp *sp, struct lcp_header *h, int len);
239 void (*RCN_nak)(struct sppp *sp, struct lcp_header *h, int len);
240 /* actions */
241 void (*tlu)(struct sppp *sp);
242 void (*tld)(struct sppp *sp);
243 void (*tls)(struct sppp *sp);
244 void (*tlf)(struct sppp *sp);
245 void (*scr)(struct sppp *sp);
246 };
247
248 static struct sppp *spppq;
249 static callout_t keepalive_ch;
250
251 #ifdef INET
252 /*
253 * The following disgusting hack gets around the problem that IP TOS
254 * can't be set yet. We want to put "interactive" traffic on a high
255 * priority queue. To decide if traffic is interactive, we check that
256 * a) it is TCP and b) one of its ports is telnet, rlogin or ftp control.
257 *
258 * XXX is this really still necessary? - joerg -
259 */
260 static u_short interactive_ports[8] = {
261 0, 513, 0, 0,
262 0, 21, 0, 23,
263 };
264 #define INTERACTIVE(p) (interactive_ports[(p) & 7] == (p))
265 #endif
266
267 /* almost every function needs these */
268 #define STDDCL \
269 struct ifnet *ifp = &sp->pp_if; \
270 int debug = ifp->if_flags & IFF_DEBUG
271
272 static int sppp_output(struct ifnet *ifp, struct mbuf *m,
273 const struct sockaddr *dst, struct rtentry *rt);
274
275 static void sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2);
276 static void sppp_cisco_input(struct sppp *sp, struct mbuf *m);
277
278 static void sppp_cp_input(const struct cp *cp, struct sppp *sp,
279 struct mbuf *m);
280 static void sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
281 u_char ident, u_short len, void *data);
282 /* static void sppp_cp_timeout(void *arg); */
283 static void sppp_cp_change_state(const struct cp *cp, struct sppp *sp,
284 int newstate);
285 static void sppp_auth_send(const struct cp *cp,
286 struct sppp *sp, unsigned int type, unsigned int id,
287 ...);
288
289 static void sppp_up_event(const struct cp *cp, struct sppp *sp);
290 static void sppp_down_event(const struct cp *cp, struct sppp *sp);
291 static void sppp_open_event(const struct cp *cp, struct sppp *sp);
292 static void sppp_close_event(const struct cp *cp, struct sppp *sp);
293 static void sppp_to_event(const struct cp *cp, struct sppp *sp);
294
295 static void sppp_null(struct sppp *sp);
296
297 static void sppp_lcp_init(struct sppp *sp);
298 static void sppp_lcp_up(struct sppp *sp);
299 static void sppp_lcp_down(struct sppp *sp);
300 static void sppp_lcp_open(struct sppp *sp);
301 static void sppp_lcp_close(struct sppp *sp);
302 static void sppp_lcp_TO(void *sp);
303 static int sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
304 static void sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
305 static void sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
306 static void sppp_lcp_tlu(struct sppp *sp);
307 static void sppp_lcp_tld(struct sppp *sp);
308 static void sppp_lcp_tls(struct sppp *sp);
309 static void sppp_lcp_tlf(struct sppp *sp);
310 static void sppp_lcp_scr(struct sppp *sp);
311 static void sppp_lcp_check_and_close(struct sppp *sp);
312 static int sppp_ncp_check(struct sppp *sp);
313
314 static void sppp_ipcp_init(struct sppp *sp);
315 static void sppp_ipcp_up(struct sppp *sp);
316 static void sppp_ipcp_down(struct sppp *sp);
317 static void sppp_ipcp_open(struct sppp *sp);
318 static void sppp_ipcp_close(struct sppp *sp);
319 static void sppp_ipcp_TO(void *sp);
320 static int sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len);
321 static void sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
322 static void sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
323 static void sppp_ipcp_tlu(struct sppp *sp);
324 static void sppp_ipcp_tld(struct sppp *sp);
325 static void sppp_ipcp_tls(struct sppp *sp);
326 static void sppp_ipcp_tlf(struct sppp *sp);
327 static void sppp_ipcp_scr(struct sppp *sp);
328
329 static void sppp_ipv6cp_init(struct sppp *sp);
330 static void sppp_ipv6cp_up(struct sppp *sp);
331 static void sppp_ipv6cp_down(struct sppp *sp);
332 static void sppp_ipv6cp_open(struct sppp *sp);
333 static void sppp_ipv6cp_close(struct sppp *sp);
334 static void sppp_ipv6cp_TO(void *sp);
335 static int sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len);
336 static void sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len);
337 static void sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len);
338 static void sppp_ipv6cp_tlu(struct sppp *sp);
339 static void sppp_ipv6cp_tld(struct sppp *sp);
340 static void sppp_ipv6cp_tls(struct sppp *sp);
341 static void sppp_ipv6cp_tlf(struct sppp *sp);
342 static void sppp_ipv6cp_scr(struct sppp *sp);
343
344 static void sppp_pap_input(struct sppp *sp, struct mbuf *m);
345 static void sppp_pap_init(struct sppp *sp);
346 static void sppp_pap_open(struct sppp *sp);
347 static void sppp_pap_close(struct sppp *sp);
348 static void sppp_pap_TO(void *sp);
349 static void sppp_pap_my_TO(void *sp);
350 static void sppp_pap_tlu(struct sppp *sp);
351 static void sppp_pap_tld(struct sppp *sp);
352 static void sppp_pap_scr(struct sppp *sp);
353
354 static void sppp_chap_input(struct sppp *sp, struct mbuf *m);
355 static void sppp_chap_init(struct sppp *sp);
356 static void sppp_chap_open(struct sppp *sp);
357 static void sppp_chap_close(struct sppp *sp);
358 static void sppp_chap_TO(void *sp);
359 static void sppp_chap_tlu(struct sppp *sp);
360 static void sppp_chap_tld(struct sppp *sp);
361 static void sppp_chap_scr(struct sppp *sp);
362
363 static const char *sppp_auth_type_name(u_short proto, u_char type);
364 static const char *sppp_cp_type_name(u_char type);
365 static const char *sppp_dotted_quad(uint32_t addr);
366 static const char *sppp_ipcp_opt_name(u_char opt);
367 #ifdef INET6
368 static const char *sppp_ipv6cp_opt_name(u_char opt);
369 #endif
370 static const char *sppp_lcp_opt_name(u_char opt);
371 static const char *sppp_phase_name(int phase);
372 static const char *sppp_proto_name(u_short proto);
373 static const char *sppp_state_name(int state);
374 static int sppp_params(struct sppp *sp, u_long cmd, void *data);
375 #ifdef INET
376 static void sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst,
377 uint32_t *srcmask);
378 static void sppp_set_ip_addrs(struct sppp *sp, uint32_t myaddr, uint32_t hisaddr);
379 static void sppp_clear_ip_addrs(struct sppp *sp);
380 #endif
381 static void sppp_keepalive(void *dummy);
382 static void sppp_phase_network(struct sppp *sp);
383 static void sppp_print_bytes(const u_char *p, u_short len);
384 static void sppp_print_string(const char *p, u_short len);
385 #ifdef INET6
386 static void sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src,
387 struct in6_addr *dst, struct in6_addr *srcmask);
388 #ifdef IPV6CP_MYIFID_DYN
389 static void sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src);
390 static void sppp_gen_ip6_addr(struct sppp *sp, const struct in6_addr *src);
391 #endif
392 static void sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *src);
393 #endif
394
395 /* our control protocol descriptors */
396 static const struct cp lcp = {
397 PPP_LCP, IDX_LCP, CP_LCP, "lcp",
398 sppp_lcp_up, sppp_lcp_down, sppp_lcp_open, sppp_lcp_close,
399 sppp_lcp_TO, sppp_lcp_RCR, sppp_lcp_RCN_rej, sppp_lcp_RCN_nak,
400 sppp_lcp_tlu, sppp_lcp_tld, sppp_lcp_tls, sppp_lcp_tlf,
401 sppp_lcp_scr
402 };
403
404 static const struct cp ipcp = {
405 PPP_IPCP, IDX_IPCP,
406 #ifdef INET
407 CP_NCP, /*don't run IPCP if there's no IPv4 support*/
408 #else
409 0,
410 #endif
411 "ipcp",
412 sppp_ipcp_up, sppp_ipcp_down, sppp_ipcp_open, sppp_ipcp_close,
413 sppp_ipcp_TO, sppp_ipcp_RCR, sppp_ipcp_RCN_rej, sppp_ipcp_RCN_nak,
414 sppp_ipcp_tlu, sppp_ipcp_tld, sppp_ipcp_tls, sppp_ipcp_tlf,
415 sppp_ipcp_scr
416 };
417
418 static const struct cp ipv6cp = {
419 PPP_IPV6CP, IDX_IPV6CP,
420 #ifdef INET6 /*don't run IPv6CP if there's no IPv6 support*/
421 CP_NCP,
422 #else
423 0,
424 #endif
425 "ipv6cp",
426 sppp_ipv6cp_up, sppp_ipv6cp_down, sppp_ipv6cp_open, sppp_ipv6cp_close,
427 sppp_ipv6cp_TO, sppp_ipv6cp_RCR, sppp_ipv6cp_RCN_rej, sppp_ipv6cp_RCN_nak,
428 sppp_ipv6cp_tlu, sppp_ipv6cp_tld, sppp_ipv6cp_tls, sppp_ipv6cp_tlf,
429 sppp_ipv6cp_scr
430 };
431
432 static const struct cp pap = {
433 PPP_PAP, IDX_PAP, CP_AUTH, "pap",
434 sppp_null, sppp_null, sppp_pap_open, sppp_pap_close,
435 sppp_pap_TO, 0, 0, 0,
436 sppp_pap_tlu, sppp_pap_tld, sppp_null, sppp_null,
437 sppp_pap_scr
438 };
439
440 static const struct cp chap = {
441 PPP_CHAP, IDX_CHAP, CP_AUTH, "chap",
442 sppp_null, sppp_null, sppp_chap_open, sppp_chap_close,
443 sppp_chap_TO, 0, 0, 0,
444 sppp_chap_tlu, sppp_chap_tld, sppp_null, sppp_null,
445 sppp_chap_scr
446 };
447
448 static const struct cp *cps[IDX_COUNT] = {
449 &lcp, /* IDX_LCP */
450 &ipcp, /* IDX_IPCP */
451 &ipv6cp, /* IDX_IPV6CP */
452 &pap, /* IDX_PAP */
453 &chap, /* IDX_CHAP */
454 };
455
456
457 void spppattach(int);
458 void
459 /*ARGSUSED*/
460 spppattach(int count)
461 {
462 }
463
464 /*
465 * Exported functions, comprising our interface to the lower layer.
466 */
467
468 /*
469 * Process the received packet.
470 */
471 void
472 sppp_input(struct ifnet *ifp, struct mbuf *m)
473 {
474 struct ppp_header *h = NULL;
475 struct ifqueue *inq = 0;
476 uint16_t protocol;
477 int s;
478 struct sppp *sp = (struct sppp *)ifp;
479 int debug = ifp->if_flags & IFF_DEBUG;
480
481 if (ifp->if_flags & IFF_UP) {
482 /* Count received bytes, add hardware framing */
483 ifp->if_ibytes += m->m_pkthdr.len + sp->pp_framebytes;
484 /* Note time of last receive */
485 sp->pp_last_receive = time_uptime;
486 }
487
488 if (m->m_pkthdr.len <= PPP_HEADER_LEN) {
489 /* Too small packet, drop it. */
490 if (debug)
491 log(LOG_DEBUG,
492 "%s: input packet is too small, %d bytes\n",
493 ifp->if_xname, m->m_pkthdr.len);
494 drop:
495 ++ifp->if_ierrors;
496 ++ifp->if_iqdrops;
497 m_freem(m);
498 return;
499 }
500
501 if (sp->pp_flags & PP_NOFRAMING) {
502 memcpy(&protocol, mtod(m, void *), 2);
503 protocol = ntohs(protocol);
504 m_adj(m, 2);
505 } else {
506
507 /* Get PPP header. */
508 h = mtod(m, struct ppp_header *);
509 m_adj(m, PPP_HEADER_LEN);
510
511 switch (h->address) {
512 case PPP_ALLSTATIONS:
513 if (h->control != PPP_UI)
514 goto invalid;
515 if (sp->pp_flags & PP_CISCO) {
516 if (debug)
517 log(LOG_DEBUG,
518 "%s: PPP packet in Cisco mode "
519 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
520 ifp->if_xname,
521 h->address, h->control, ntohs(h->protocol));
522 goto drop;
523 }
524 break;
525 case CISCO_MULTICAST:
526 case CISCO_UNICAST:
527 /* Don't check the control field here (RFC 1547). */
528 if (! (sp->pp_flags & PP_CISCO)) {
529 if (debug)
530 log(LOG_DEBUG,
531 "%s: Cisco packet in PPP mode "
532 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
533 ifp->if_xname,
534 h->address, h->control, ntohs(h->protocol));
535 goto drop;
536 }
537 switch (ntohs(h->protocol)) {
538 default:
539 ++ifp->if_noproto;
540 goto invalid;
541 case CISCO_KEEPALIVE:
542 sppp_cisco_input((struct sppp *) ifp, m);
543 m_freem(m);
544 return;
545 #ifdef INET
546 case ETHERTYPE_IP:
547 schednetisr(NETISR_IP);
548 inq = &ipintrq;
549 break;
550 #endif
551 #ifdef INET6
552 case ETHERTYPE_IPV6:
553 schednetisr(NETISR_IPV6);
554 inq = &ip6intrq;
555 break;
556 #endif
557 #ifdef IPX
558 case ETHERTYPE_IPX:
559 schednetisr(NETISR_IPX);
560 inq = &ipxintrq;
561 break;
562 #endif
563 }
564 goto queue_pkt;
565 default: /* Invalid PPP packet. */
566 invalid:
567 if (debug)
568 log(LOG_DEBUG,
569 "%s: invalid input packet "
570 "<addr=0x%x ctrl=0x%x proto=0x%x>\n",
571 ifp->if_xname,
572 h->address, h->control, ntohs(h->protocol));
573 goto drop;
574 }
575 protocol = ntohs(h->protocol);
576 }
577
578 switch (protocol) {
579 default:
580 if (sp->state[IDX_LCP] == STATE_OPENED) {
581 uint16_t prot = htons(protocol);
582 sppp_cp_send(sp, PPP_LCP, PROTO_REJ,
583 ++sp->pp_seq[IDX_LCP], m->m_pkthdr.len + 2,
584 &prot);
585 }
586 if (debug)
587 log(LOG_DEBUG,
588 "%s: invalid input protocol "
589 "<proto=0x%x>\n", ifp->if_xname, ntohs(protocol));
590 ++ifp->if_noproto;
591 goto drop;
592 case PPP_LCP:
593 sppp_cp_input(&lcp, sp, m);
594 m_freem(m);
595 return;
596 case PPP_PAP:
597 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE)
598 sppp_pap_input(sp, m);
599 m_freem(m);
600 return;
601 case PPP_CHAP:
602 if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE)
603 sppp_chap_input(sp, m);
604 m_freem(m);
605 return;
606 #ifdef INET
607 case PPP_IPCP:
608 if (sp->pp_phase == SPPP_PHASE_NETWORK)
609 sppp_cp_input(&ipcp, sp, m);
610 m_freem(m);
611 return;
612 case PPP_IP:
613 if (sp->state[IDX_IPCP] == STATE_OPENED) {
614 schednetisr(NETISR_IP);
615 inq = &ipintrq;
616 sp->pp_last_activity = time_uptime;
617 }
618 break;
619 #endif
620 #ifdef INET6
621 case PPP_IPV6CP:
622 if (sp->pp_phase == SPPP_PHASE_NETWORK)
623 sppp_cp_input(&ipv6cp, sp, m);
624 m_freem(m);
625 return;
626
627 case PPP_IPV6:
628 if (sp->state[IDX_IPV6CP] == STATE_OPENED) {
629 schednetisr(NETISR_IPV6);
630 inq = &ip6intrq;
631 sp->pp_last_activity = time_uptime;
632 }
633 break;
634 #endif
635 #ifdef IPX
636 case PPP_IPX:
637 /* IPX IPXCP not implemented yet */
638 if (sp->pp_phase == SPPP_PHASE_NETWORK) {
639 schednetisr(NETISR_IPX);
640 inq = &ipxintrq;
641 }
642 break;
643 #endif
644 #ifdef ISO
645 case PPP_ISO:
646 /* OSI NLCP not implemented yet */
647 if (sp->pp_phase == SPPP_PHASE_NETWORK) {
648 schednetisr(NETISR_ISO);
649 inq = &clnlintrq;
650 }
651 break;
652 #endif
653 }
654
655 queue_pkt:
656 if (! (ifp->if_flags & IFF_UP) || ! inq)
657 goto drop;
658
659 /* Check queue. */
660 s = splnet();
661 if (IF_QFULL(inq)) {
662 /* Queue overflow. */
663 IF_DROP(inq);
664 splx(s);
665 if (debug)
666 log(LOG_DEBUG, "%s: protocol queue overflow\n",
667 ifp->if_xname);
668 goto drop;
669 }
670 IF_ENQUEUE(inq, m);
671 splx(s);
672 }
673
674 /*
675 * Enqueue transmit packet.
676 */
677 static int
678 sppp_output(struct ifnet *ifp, struct mbuf *m,
679 const struct sockaddr *dst, struct rtentry *rt)
680 {
681 struct sppp *sp = (struct sppp *) ifp;
682 struct ppp_header *h = NULL;
683 struct ifqueue *ifq = NULL; /* XXX */
684 int s, error = 0;
685 uint16_t protocol;
686 ALTQ_DECL(struct altq_pktattr pktattr;)
687
688 s = splnet();
689
690 sp->pp_last_activity = time_uptime;
691
692 if ((ifp->if_flags & IFF_UP) == 0 ||
693 (ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == 0) {
694 m_freem(m);
695 splx(s);
696 return (ENETDOWN);
697 }
698
699 if ((ifp->if_flags & (IFF_RUNNING | IFF_AUTO)) == IFF_AUTO) {
700 /*
701 * Interface is not yet running, but auto-dial. Need
702 * to start LCP for it.
703 */
704 ifp->if_flags |= IFF_RUNNING;
705 splx(s);
706 lcp.Open(sp);
707 s = splnet();
708 }
709
710 /*
711 * If the queueing discipline needs packet classification,
712 * do it before prepending link headers.
713 */
714 IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr);
715
716 #ifdef INET
717 if (dst->sa_family == AF_INET) {
718 struct ip *ip = NULL;
719 struct tcphdr *th = NULL;
720
721 if (m->m_len >= sizeof(struct ip)) {
722 ip = mtod(m, struct ip *);
723 if (ip->ip_p == IPPROTO_TCP &&
724 m->m_len >= sizeof(struct ip) + (ip->ip_hl << 2) +
725 sizeof(struct tcphdr)) {
726 th = (struct tcphdr *)
727 ((char *)ip + (ip->ip_hl << 2));
728 }
729 } else
730 ip = NULL;
731
732 /*
733 * When using dynamic local IP address assignment by using
734 * 0.0.0.0 as a local address, the first TCP session will
735 * not connect because the local TCP checksum is computed
736 * using 0.0.0.0 which will later become our real IP address
737 * so the TCP checksum computed at the remote end will
738 * become invalid. So we
739 * - don't let packets with src ip addr 0 thru
740 * - we flag TCP packets with src ip 0 as an error
741 */
742 if (ip && ip->ip_src.s_addr == INADDR_ANY) {
743 uint8_t proto = ip->ip_p;
744
745 m_freem(m);
746 splx(s);
747 if (proto == IPPROTO_TCP)
748 return (EADDRNOTAVAIL);
749 else
750 return (0);
751 }
752
753 /*
754 * Put low delay, telnet, rlogin and ftp control packets
755 * in front of the queue.
756 */
757
758 if (!IF_QFULL(&sp->pp_fastq) &&
759 ((ip && (ip->ip_tos & IPTOS_LOWDELAY)) ||
760 (th && (INTERACTIVE(ntohs(th->th_sport)) ||
761 INTERACTIVE(ntohs(th->th_dport))))))
762 ifq = &sp->pp_fastq;
763 }
764 #endif
765
766 #ifdef INET6
767 if (dst->sa_family == AF_INET6) {
768 /* XXX do something tricky here? */
769 }
770 #endif
771
772 if ((sp->pp_flags & PP_NOFRAMING) == 0) {
773 /*
774 * Prepend general data packet PPP header. For now, IP only.
775 */
776 M_PREPEND(m, PPP_HEADER_LEN, M_DONTWAIT);
777 if (! m) {
778 if (ifp->if_flags & IFF_DEBUG)
779 log(LOG_DEBUG, "%s: no memory for transmit header\n",
780 ifp->if_xname);
781 ++ifp->if_oerrors;
782 splx(s);
783 return (ENOBUFS);
784 }
785 /*
786 * May want to check size of packet
787 * (albeit due to the implementation it's always enough)
788 */
789 h = mtod(m, struct ppp_header *);
790 if (sp->pp_flags & PP_CISCO) {
791 h->address = CISCO_UNICAST; /* unicast address */
792 h->control = 0;
793 } else {
794 h->address = PPP_ALLSTATIONS; /* broadcast address */
795 h->control = PPP_UI; /* Unnumbered Info */
796 }
797 }
798
799 switch (dst->sa_family) {
800 #ifdef INET
801 case AF_INET: /* Internet Protocol */
802 if (sp->pp_flags & PP_CISCO)
803 protocol = htons(ETHERTYPE_IP);
804 else {
805 /*
806 * Don't choke with an ENETDOWN early. It's
807 * possible that we just started dialing out,
808 * so don't drop the packet immediately. If
809 * we notice that we run out of buffer space
810 * below, we will however remember that we are
811 * not ready to carry IP packets, and return
812 * ENETDOWN, as opposed to ENOBUFS.
813 */
814 protocol = htons(PPP_IP);
815 if (sp->state[IDX_IPCP] != STATE_OPENED)
816 error = ENETDOWN;
817 }
818 break;
819 #endif
820 #ifdef INET6
821 case AF_INET6: /* Internet Protocol version 6 */
822 if (sp->pp_flags & PP_CISCO)
823 protocol = htons(ETHERTYPE_IPV6);
824 else {
825 /*
826 * Don't choke with an ENETDOWN early. It's
827 * possible that we just started dialing out,
828 * so don't drop the packet immediately. If
829 * we notice that we run out of buffer space
830 * below, we will however remember that we are
831 * not ready to carry IP packets, and return
832 * ENETDOWN, as opposed to ENOBUFS.
833 */
834 protocol = htons(PPP_IPV6);
835 if (sp->state[IDX_IPV6CP] != STATE_OPENED)
836 error = ENETDOWN;
837 }
838 break;
839 #endif
840 #ifdef IPX
841 case AF_IPX: /* Novell IPX Protocol */
842 protocol = htons((sp->pp_flags & PP_CISCO) ?
843 ETHERTYPE_IPX : PPP_IPX);
844 break;
845 #endif
846 #ifdef ISO
847 case AF_ISO: /* ISO OSI Protocol */
848 if (sp->pp_flags & PP_CISCO)
849 goto nosupport;
850 protocol = htons(PPP_ISO);
851 break;
852 nosupport:
853 #endif
854 default:
855 m_freem(m);
856 ++ifp->if_oerrors;
857 splx(s);
858 return (EAFNOSUPPORT);
859 }
860
861 if (sp->pp_flags & PP_NOFRAMING) {
862 M_PREPEND(m, 2, M_DONTWAIT);
863 if (m == NULL) {
864 if (ifp->if_flags & IFF_DEBUG)
865 log(LOG_DEBUG, "%s: no memory for transmit header\n",
866 ifp->if_xname);
867 ++ifp->if_oerrors;
868 splx(s);
869 return (ENOBUFS);
870 }
871 *mtod(m, uint16_t *) = protocol;
872 } else {
873 h->protocol = protocol;
874 }
875
876
877 error = ifq_enqueue2(ifp, ifq, m ALTQ_COMMA ALTQ_DECL(&pktattr));
878
879 if (error == 0) {
880 /*
881 * Count output packets and bytes.
882 * The packet length includes header + additional hardware
883 * framing according to RFC 1333.
884 */
885 if (!(ifp->if_flags & IFF_OACTIVE))
886 (*ifp->if_start)(ifp);
887 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes;
888 }
889 splx(s);
890 return error;
891 }
892
893 void
894 sppp_attach(struct ifnet *ifp)
895 {
896 struct sppp *sp = (struct sppp *) ifp;
897
898 /* Initialize keepalive handler. */
899 if (! spppq) {
900 callout_init(&keepalive_ch, 0);
901 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL);
902 }
903
904 /* Insert new entry into the keepalive list. */
905 sp->pp_next = spppq;
906 spppq = sp;
907
908 sp->pp_if.if_type = IFT_PPP;
909 sp->pp_if.if_output = sppp_output;
910 sp->pp_fastq.ifq_maxlen = 32;
911 sp->pp_cpq.ifq_maxlen = 20;
912 sp->pp_loopcnt = 0;
913 sp->pp_alivecnt = 0;
914 sp->pp_last_activity = 0;
915 sp->pp_last_receive = 0;
916 sp->pp_maxalive = DEFAULT_MAXALIVECNT;
917 sp->pp_max_noreceive = DEFAULT_NORECV_TIME;
918 sp->pp_idle_timeout = 0;
919 memset(&sp->pp_seq[0], 0, sizeof(sp->pp_seq));
920 memset(&sp->pp_rseq[0], 0, sizeof(sp->pp_rseq));
921 sp->pp_auth_failures = 0;
922 sp->pp_max_auth_fail = DEFAULT_MAX_AUTH_FAILURES;
923 sp->pp_phase = SPPP_PHASE_DEAD;
924 sp->pp_up = lcp.Up;
925 sp->pp_down = lcp.Down;
926
927 if_alloc_sadl(ifp);
928
929 memset(&sp->myauth, 0, sizeof sp->myauth);
930 memset(&sp->hisauth, 0, sizeof sp->hisauth);
931 sppp_lcp_init(sp);
932 sppp_ipcp_init(sp);
933 sppp_ipv6cp_init(sp);
934 sppp_pap_init(sp);
935 sppp_chap_init(sp);
936 }
937
938 void
939 sppp_detach(struct ifnet *ifp)
940 {
941 struct sppp **q, *p, *sp = (struct sppp *) ifp;
942
943 /* Remove the entry from the keepalive list. */
944 for (q = &spppq; (p = *q); q = &p->pp_next)
945 if (p == sp) {
946 *q = p->pp_next;
947 break;
948 }
949
950 /* Stop keepalive handler. */
951 if (! spppq) {
952 callout_stop(&keepalive_ch);
953 }
954
955 callout_stop(&sp->ch[IDX_LCP]);
956 callout_stop(&sp->ch[IDX_IPCP]);
957 callout_stop(&sp->ch[IDX_PAP]);
958 callout_stop(&sp->ch[IDX_CHAP]);
959 #ifdef INET6
960 callout_stop(&sp->ch[IDX_IPV6CP]);
961 #endif
962 callout_stop(&sp->pap_my_to_ch);
963
964 /* free authentication info */
965 if (sp->myauth.name) free(sp->myauth.name, M_DEVBUF);
966 if (sp->myauth.secret) free(sp->myauth.secret, M_DEVBUF);
967 if (sp->hisauth.name) free(sp->hisauth.name, M_DEVBUF);
968 if (sp->hisauth.secret) free(sp->hisauth.secret, M_DEVBUF);
969
970 #if 0 /* done in if_detach() */
971 if_free_sadl(ifp);
972 #endif
973 }
974
975 /*
976 * Flush the interface output queue.
977 */
978 void
979 sppp_flush(struct ifnet *ifp)
980 {
981 struct sppp *sp = (struct sppp *) ifp;
982
983 IFQ_PURGE(&sp->pp_if.if_snd);
984 IF_PURGE(&sp->pp_fastq);
985 IF_PURGE(&sp->pp_cpq);
986 }
987
988 /*
989 * Check if the output queue is empty.
990 */
991 int
992 sppp_isempty(struct ifnet *ifp)
993 {
994 struct sppp *sp = (struct sppp *) ifp;
995 int empty, s;
996
997 s = splnet();
998 empty = IF_IS_EMPTY(&sp->pp_fastq) && IF_IS_EMPTY(&sp->pp_cpq) &&
999 IFQ_IS_EMPTY(&sp->pp_if.if_snd);
1000 splx(s);
1001 return (empty);
1002 }
1003
1004 /*
1005 * Get next packet to send.
1006 */
1007 struct mbuf *
1008 sppp_dequeue(struct ifnet *ifp)
1009 {
1010 struct sppp *sp = (struct sppp *) ifp;
1011 struct mbuf *m;
1012 int s;
1013
1014 s = splnet();
1015 /*
1016 * Process only the control protocol queue until we have at
1017 * least one NCP open.
1018 *
1019 * Do always serve all three queues in Cisco mode.
1020 */
1021 IF_DEQUEUE(&sp->pp_cpq, m);
1022 if (m == NULL &&
1023 (sppp_ncp_check(sp) || (sp->pp_flags & PP_CISCO) != 0)) {
1024 IF_DEQUEUE(&sp->pp_fastq, m);
1025 if (m == NULL)
1026 IFQ_DEQUEUE(&sp->pp_if.if_snd, m);
1027 }
1028 splx(s);
1029 return m;
1030 }
1031
1032 /*
1033 * Process an ioctl request. Called on low priority level.
1034 */
1035 int
1036 sppp_ioctl(struct ifnet *ifp, u_long cmd, void *data)
1037 {
1038 struct lwp *l = curlwp; /* XXX */
1039 struct ifreq *ifr = (struct ifreq *) data;
1040 struct sppp *sp = (struct sppp *) ifp;
1041 int s, error=0, going_up, going_down, newmode;
1042
1043 s = splnet();
1044 switch (cmd) {
1045 case SIOCSIFDSTADDR:
1046 case SIOCINITIFADDR:
1047 break;
1048
1049 case SIOCSIFFLAGS:
1050 if ((error = ifioctl_common(ifp, cmd, data)) != 0)
1051 break;
1052 going_up = ifp->if_flags & IFF_UP &&
1053 (ifp->if_flags & IFF_RUNNING) == 0;
1054 going_down = (ifp->if_flags & IFF_UP) == 0 &&
1055 ifp->if_flags & IFF_RUNNING;
1056 newmode = ifp->if_flags & (IFF_AUTO | IFF_PASSIVE);
1057 if (newmode == (IFF_AUTO | IFF_PASSIVE)) {
1058 /* sanity */
1059 newmode = IFF_PASSIVE;
1060 ifp->if_flags &= ~IFF_AUTO;
1061 }
1062
1063 if (going_up || going_down)
1064 lcp.Close(sp);
1065 if (going_up && newmode == 0) {
1066 /* neither auto-dial nor passive */
1067 ifp->if_flags |= IFF_RUNNING;
1068 if (!(sp->pp_flags & PP_CISCO))
1069 lcp.Open(sp);
1070 } else if (going_down) {
1071 sppp_flush(ifp);
1072 ifp->if_flags &= ~IFF_RUNNING;
1073 }
1074
1075 break;
1076
1077 case SIOCSIFMTU:
1078 if (ifr->ifr_mtu < PPP_MINMRU ||
1079 ifr->ifr_mtu > sp->lcp.their_mru) {
1080 error = EINVAL;
1081 break;
1082 }
1083 /*FALLTHROUGH*/
1084 case SIOCGIFMTU:
1085 if ((error = ifioctl_common(ifp, cmd, data)) == ENETRESET)
1086 error = 0;
1087 break;
1088 case SIOCADDMULTI:
1089 case SIOCDELMULTI:
1090 break;
1091
1092 case SPPPSETAUTHCFG:
1093 case SPPPSETLCPCFG:
1094 case SPPPSETIDLETO:
1095 case SPPPSETAUTHFAILURE:
1096 case SPPPSETDNSOPTS:
1097 case SPPPSETKEEPALIVE:
1098 error = kauth_authorize_network(l->l_cred,
1099 KAUTH_NETWORK_INTERFACE,
1100 KAUTH_REQ_NETWORK_INTERFACE_SETPRIV, ifp, (void *)cmd,
1101 NULL);
1102 if (error)
1103 break;
1104 error = sppp_params(sp, cmd, data);
1105 break;
1106
1107 case SPPPGETAUTHCFG:
1108 case SPPPGETLCPCFG:
1109 case SPPPGETAUTHFAILURES:
1110 error = kauth_authorize_network(l->l_cred,
1111 KAUTH_NETWORK_INTERFACE,
1112 KAUTH_REQ_NETWORK_INTERFACE_GETPRIV, ifp, (void *)cmd,
1113 NULL);
1114 if (error)
1115 break;
1116 error = sppp_params(sp, cmd, data);
1117 break;
1118
1119 case SPPPGETSTATUS:
1120 case SPPPGETSTATUSNCP:
1121 case SPPPGETIDLETO:
1122 case SPPPGETDNSOPTS:
1123 case SPPPGETDNSADDRS:
1124 case SPPPGETKEEPALIVE:
1125 error = sppp_params(sp, cmd, data);
1126 break;
1127
1128 default:
1129 error = ifioctl_common(ifp, cmd, data);
1130 break;
1131 }
1132 splx(s);
1133 return (error);
1134 }
1135
1136
1137 /*
1138 * Cisco framing implementation.
1139 */
1140
1141 /*
1142 * Handle incoming Cisco keepalive protocol packets.
1143 */
1144 static void
1145 sppp_cisco_input(struct sppp *sp, struct mbuf *m)
1146 {
1147 STDDCL;
1148 struct cisco_packet *h;
1149 #ifdef INET
1150 uint32_t me, mymask = 0; /* XXX: GCC */
1151 #endif
1152
1153 if (m->m_pkthdr.len < CISCO_PACKET_LEN) {
1154 if (debug)
1155 log(LOG_DEBUG,
1156 "%s: cisco invalid packet length: %d bytes\n",
1157 ifp->if_xname, m->m_pkthdr.len);
1158 return;
1159 }
1160 h = mtod(m, struct cisco_packet *);
1161 if (debug)
1162 log(LOG_DEBUG,
1163 "%s: cisco input: %d bytes "
1164 "<0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n",
1165 ifp->if_xname, m->m_pkthdr.len,
1166 ntohl(h->type), h->par1, h->par2, (u_int)h->rel,
1167 (u_int)h->time0, (u_int)h->time1);
1168 switch (ntohl(h->type)) {
1169 default:
1170 if (debug)
1171 addlog("%s: cisco unknown packet type: 0x%x\n",
1172 ifp->if_xname, ntohl(h->type));
1173 break;
1174 case CISCO_ADDR_REPLY:
1175 /* Reply on address request, ignore */
1176 break;
1177 case CISCO_KEEPALIVE_REQ:
1178 sp->pp_alivecnt = 0;
1179 sp->pp_rseq[IDX_LCP] = ntohl(h->par1);
1180 if (sp->pp_seq[IDX_LCP] == sp->pp_rseq[IDX_LCP]) {
1181 /* Local and remote sequence numbers are equal.
1182 * Probably, the line is in loopback mode. */
1183 if (sp->pp_loopcnt >= LOOPALIVECNT) {
1184 printf ("%s: loopback\n",
1185 ifp->if_xname);
1186 sp->pp_loopcnt = 0;
1187 if (ifp->if_flags & IFF_UP) {
1188 if_down(ifp);
1189 IF_PURGE(&sp->pp_cpq);
1190 }
1191 }
1192 ++sp->pp_loopcnt;
1193
1194 /* Generate new local sequence number */
1195 sp->pp_seq[IDX_LCP] = arc4random();
1196 break;
1197 }
1198 sp->pp_loopcnt = 0;
1199 if (! (ifp->if_flags & IFF_UP) &&
1200 (ifp->if_flags & IFF_RUNNING)) {
1201 if_up(ifp);
1202 }
1203 break;
1204 case CISCO_ADDR_REQ:
1205 #ifdef INET
1206 sppp_get_ip_addrs(sp, &me, 0, &mymask);
1207 if (me != 0L)
1208 sppp_cisco_send(sp, CISCO_ADDR_REPLY, me, mymask);
1209 #endif
1210 break;
1211 }
1212 }
1213
1214 /*
1215 * Send Cisco keepalive packet.
1216 */
1217 static void
1218 sppp_cisco_send(struct sppp *sp, int type, int32_t par1, int32_t par2)
1219 {
1220 STDDCL;
1221 struct ppp_header *h;
1222 struct cisco_packet *ch;
1223 struct mbuf *m;
1224 uint32_t t;
1225
1226 t = time_uptime * 1000;
1227 MGETHDR(m, M_DONTWAIT, MT_DATA);
1228 if (! m)
1229 return;
1230 m->m_pkthdr.len = m->m_len = PPP_HEADER_LEN + CISCO_PACKET_LEN;
1231 m->m_pkthdr.rcvif = 0;
1232
1233 h = mtod(m, struct ppp_header *);
1234 h->address = CISCO_MULTICAST;
1235 h->control = 0;
1236 h->protocol = htons(CISCO_KEEPALIVE);
1237
1238 ch = (struct cisco_packet *)(h + 1);
1239 ch->type = htonl(type);
1240 ch->par1 = htonl(par1);
1241 ch->par2 = htonl(par2);
1242 ch->rel = -1;
1243
1244 ch->time0 = htons((u_short)(t >> 16));
1245 ch->time1 = htons((u_short) t);
1246
1247 if (debug)
1248 log(LOG_DEBUG,
1249 "%s: cisco output: <0x%x 0x%x 0x%x 0x%x 0x%x-0x%x>\n",
1250 ifp->if_xname, ntohl(ch->type), ch->par1,
1251 ch->par2, (u_int)ch->rel, (u_int)ch->time0,
1252 (u_int)ch->time1);
1253
1254 if (IF_QFULL(&sp->pp_cpq)) {
1255 IF_DROP(&sp->pp_fastq);
1256 IF_DROP(&ifp->if_snd);
1257 m_freem(m);
1258 ++ifp->if_oerrors;
1259 return;
1260 } else
1261 IF_ENQUEUE(&sp->pp_cpq, m);
1262 if (! (ifp->if_flags & IFF_OACTIVE))
1263 (*ifp->if_start)(ifp);
1264 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes;
1265 }
1266
1267 /*
1268 * PPP protocol implementation.
1269 */
1270
1271 /*
1272 * Send PPP control protocol packet.
1273 */
1274 static void
1275 sppp_cp_send(struct sppp *sp, u_short proto, u_char type,
1276 u_char ident, u_short len, void *data)
1277 {
1278 STDDCL;
1279 struct lcp_header *lh;
1280 struct mbuf *m;
1281 size_t pkthdrlen;
1282
1283 pkthdrlen = (sp->pp_flags & PP_NOFRAMING) ? 2 : PPP_HEADER_LEN;
1284
1285 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN)
1286 len = MHLEN - pkthdrlen - LCP_HEADER_LEN;
1287 MGETHDR(m, M_DONTWAIT, MT_DATA);
1288 if (! m)
1289 return;
1290 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len;
1291 m->m_pkthdr.rcvif = 0;
1292
1293 if (sp->pp_flags & PP_NOFRAMING) {
1294 *mtod(m, uint16_t *) = htons(proto);
1295 lh = (struct lcp_header *)(mtod(m, uint8_t *) + 2);
1296 } else {
1297 struct ppp_header *h;
1298 h = mtod(m, struct ppp_header *);
1299 h->address = PPP_ALLSTATIONS; /* broadcast address */
1300 h->control = PPP_UI; /* Unnumbered Info */
1301 h->protocol = htons(proto); /* Link Control Protocol */
1302 lh = (struct lcp_header *)(h + 1);
1303 }
1304 lh->type = type;
1305 lh->ident = ident;
1306 lh->len = htons(LCP_HEADER_LEN + len);
1307 if (len)
1308 bcopy (data, lh + 1, len);
1309
1310 if (debug) {
1311 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d",
1312 ifp->if_xname,
1313 sppp_proto_name(proto),
1314 sppp_cp_type_name(lh->type), lh->ident, ntohs(lh->len));
1315 if (len)
1316 sppp_print_bytes((u_char *)(lh + 1), len);
1317 addlog(">\n");
1318 }
1319 if (IF_QFULL(&sp->pp_cpq)) {
1320 IF_DROP(&sp->pp_fastq);
1321 IF_DROP(&ifp->if_snd);
1322 m_freem(m);
1323 ++ifp->if_oerrors;
1324 return;
1325 } else
1326 IF_ENQUEUE(&sp->pp_cpq, m);
1327 if (! (ifp->if_flags & IFF_OACTIVE))
1328 (*ifp->if_start)(ifp);
1329 ifp->if_obytes += m->m_pkthdr.len + sp->pp_framebytes;
1330 }
1331
1332 /*
1333 * Handle incoming PPP control protocol packets.
1334 */
1335 static void
1336 sppp_cp_input(const struct cp *cp, struct sppp *sp, struct mbuf *m)
1337 {
1338 STDDCL;
1339 struct lcp_header *h;
1340 int printlen, len = m->m_pkthdr.len;
1341 int rv;
1342 u_char *p;
1343 uint32_t u32;
1344
1345 if (len < 4) {
1346 if (debug)
1347 log(LOG_DEBUG,
1348 "%s: %s invalid packet length: %d bytes\n",
1349 ifp->if_xname, cp->name, len);
1350 return;
1351 }
1352 h = mtod(m, struct lcp_header *);
1353 if (debug) {
1354 printlen = ntohs(h->len);
1355 log(LOG_DEBUG,
1356 "%s: %s input(%s): <%s id=0x%x len=%d",
1357 ifp->if_xname, cp->name,
1358 sppp_state_name(sp->state[cp->protoidx]),
1359 sppp_cp_type_name(h->type), h->ident, printlen);
1360 if (len < printlen)
1361 printlen = len;
1362 if (printlen > 4)
1363 sppp_print_bytes((u_char *)(h + 1), printlen - 4);
1364 addlog(">\n");
1365 }
1366 if (len > ntohs(h->len))
1367 len = ntohs(h->len);
1368 p = (u_char *)(h + 1);
1369 switch (h->type) {
1370 case CONF_REQ:
1371 if (len < 4) {
1372 if (debug)
1373 addlog("%s: %s invalid conf-req length %d\n",
1374 ifp->if_xname, cp->name,
1375 len);
1376 ++ifp->if_ierrors;
1377 break;
1378 }
1379 /* handle states where RCR doesn't get a SCA/SCN */
1380 switch (sp->state[cp->protoidx]) {
1381 case STATE_CLOSING:
1382 case STATE_STOPPING:
1383 return;
1384 case STATE_CLOSED:
1385 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident,
1386 0, 0);
1387 return;
1388 }
1389 rv = (cp->RCR)(sp, h, len);
1390 if (rv < 0) {
1391 /* fatal error, shut down */
1392 (cp->tld)(sp);
1393 sppp_lcp_tlf(sp);
1394 return;
1395 }
1396 switch (sp->state[cp->protoidx]) {
1397 case STATE_OPENED:
1398 (cp->tld)(sp);
1399 (cp->scr)(sp);
1400 /* fall through... */
1401 case STATE_ACK_SENT:
1402 case STATE_REQ_SENT:
1403 sppp_cp_change_state(cp, sp, rv?
1404 STATE_ACK_SENT: STATE_REQ_SENT);
1405 break;
1406 case STATE_STOPPED:
1407 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1408 (cp->scr)(sp);
1409 sppp_cp_change_state(cp, sp, rv?
1410 STATE_ACK_SENT: STATE_REQ_SENT);
1411 break;
1412 case STATE_ACK_RCVD:
1413 if (rv) {
1414 sppp_cp_change_state(cp, sp, STATE_OPENED);
1415 if (debug)
1416 log(LOG_DEBUG, "%s: %s tlu\n",
1417 ifp->if_xname,
1418 cp->name);
1419 (cp->tlu)(sp);
1420 } else
1421 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1422 break;
1423 default:
1424 printf("%s: %s illegal %s in state %s\n",
1425 ifp->if_xname, cp->name,
1426 sppp_cp_type_name(h->type),
1427 sppp_state_name(sp->state[cp->protoidx]));
1428 ++ifp->if_ierrors;
1429 }
1430 break;
1431 case CONF_ACK:
1432 if (h->ident != sp->confid[cp->protoidx]) {
1433 if (debug)
1434 addlog("%s: %s id mismatch 0x%x != 0x%x\n",
1435 ifp->if_xname, cp->name,
1436 h->ident, sp->confid[cp->protoidx]);
1437 ++ifp->if_ierrors;
1438 break;
1439 }
1440 switch (sp->state[cp->protoidx]) {
1441 case STATE_CLOSED:
1442 case STATE_STOPPED:
1443 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1444 break;
1445 case STATE_CLOSING:
1446 case STATE_STOPPING:
1447 break;
1448 case STATE_REQ_SENT:
1449 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1450 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1451 break;
1452 case STATE_OPENED:
1453 (cp->tld)(sp);
1454 /* fall through */
1455 case STATE_ACK_RCVD:
1456 (cp->scr)(sp);
1457 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1458 break;
1459 case STATE_ACK_SENT:
1460 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1461 sppp_cp_change_state(cp, sp, STATE_OPENED);
1462 if (debug)
1463 log(LOG_DEBUG, "%s: %s tlu\n",
1464 ifp->if_xname, cp->name);
1465 (cp->tlu)(sp);
1466 break;
1467 default:
1468 printf("%s: %s illegal %s in state %s\n",
1469 ifp->if_xname, cp->name,
1470 sppp_cp_type_name(h->type),
1471 sppp_state_name(sp->state[cp->protoidx]));
1472 ++ifp->if_ierrors;
1473 }
1474 break;
1475 case CONF_NAK:
1476 case CONF_REJ:
1477 if (h->ident != sp->confid[cp->protoidx]) {
1478 if (debug)
1479 addlog("%s: %s id mismatch 0x%x != 0x%x\n",
1480 ifp->if_xname, cp->name,
1481 h->ident, sp->confid[cp->protoidx]);
1482 ++ifp->if_ierrors;
1483 break;
1484 }
1485 if (h->type == CONF_NAK)
1486 (cp->RCN_nak)(sp, h, len);
1487 else /* CONF_REJ */
1488 (cp->RCN_rej)(sp, h, len);
1489
1490 switch (sp->state[cp->protoidx]) {
1491 case STATE_CLOSED:
1492 case STATE_STOPPED:
1493 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1494 break;
1495 case STATE_REQ_SENT:
1496 case STATE_ACK_SENT:
1497 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1498 (cp->scr)(sp);
1499 break;
1500 case STATE_OPENED:
1501 (cp->tld)(sp);
1502 /* fall through */
1503 case STATE_ACK_RCVD:
1504 sppp_cp_change_state(cp, sp, STATE_ACK_SENT);
1505 (cp->scr)(sp);
1506 break;
1507 case STATE_CLOSING:
1508 case STATE_STOPPING:
1509 break;
1510 default:
1511 printf("%s: %s illegal %s in state %s\n",
1512 ifp->if_xname, cp->name,
1513 sppp_cp_type_name(h->type),
1514 sppp_state_name(sp->state[cp->protoidx]));
1515 ++ifp->if_ierrors;
1516 }
1517 break;
1518
1519 case TERM_REQ:
1520 switch (sp->state[cp->protoidx]) {
1521 case STATE_ACK_RCVD:
1522 case STATE_ACK_SENT:
1523 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1524 /* fall through */
1525 case STATE_CLOSED:
1526 case STATE_STOPPED:
1527 case STATE_CLOSING:
1528 case STATE_STOPPING:
1529 case STATE_REQ_SENT:
1530 sta:
1531 /* Send Terminate-Ack packet. */
1532 if (debug)
1533 log(LOG_DEBUG, "%s: %s send terminate-ack\n",
1534 ifp->if_xname, cp->name);
1535 sppp_cp_send(sp, cp->proto, TERM_ACK, h->ident, 0, 0);
1536 break;
1537 case STATE_OPENED:
1538 (cp->tld)(sp);
1539 sp->rst_counter[cp->protoidx] = 0;
1540 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1541 goto sta;
1542 default:
1543 printf("%s: %s illegal %s in state %s\n",
1544 ifp->if_xname, cp->name,
1545 sppp_cp_type_name(h->type),
1546 sppp_state_name(sp->state[cp->protoidx]));
1547 ++ifp->if_ierrors;
1548 }
1549 break;
1550 case TERM_ACK:
1551 switch (sp->state[cp->protoidx]) {
1552 case STATE_CLOSED:
1553 case STATE_STOPPED:
1554 case STATE_REQ_SENT:
1555 case STATE_ACK_SENT:
1556 break;
1557 case STATE_CLOSING:
1558 (cp->tlf)(sp);
1559 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1560 sppp_lcp_check_and_close(sp);
1561 break;
1562 case STATE_STOPPING:
1563 (cp->tlf)(sp);
1564 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1565 sppp_lcp_check_and_close(sp);
1566 break;
1567 case STATE_ACK_RCVD:
1568 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1569 break;
1570 case STATE_OPENED:
1571 (cp->tld)(sp);
1572 (cp->scr)(sp);
1573 sppp_cp_change_state(cp, sp, STATE_ACK_RCVD);
1574 break;
1575 default:
1576 printf("%s: %s illegal %s in state %s\n",
1577 ifp->if_xname, cp->name,
1578 sppp_cp_type_name(h->type),
1579 sppp_state_name(sp->state[cp->protoidx]));
1580 ++ifp->if_ierrors;
1581 }
1582 break;
1583 case CODE_REJ:
1584 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1585 log(LOG_INFO,
1586 "%s: %s: ignoring RXJ (%s) for code ?, "
1587 "danger will robinson\n",
1588 ifp->if_xname, cp->name,
1589 sppp_cp_type_name(h->type));
1590 switch (sp->state[cp->protoidx]) {
1591 case STATE_CLOSED:
1592 case STATE_STOPPED:
1593 case STATE_REQ_SENT:
1594 case STATE_ACK_SENT:
1595 case STATE_CLOSING:
1596 case STATE_STOPPING:
1597 case STATE_OPENED:
1598 break;
1599 case STATE_ACK_RCVD:
1600 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1601 break;
1602 default:
1603 printf("%s: %s illegal %s in state %s\n",
1604 ifp->if_xname, cp->name,
1605 sppp_cp_type_name(h->type),
1606 sppp_state_name(sp->state[cp->protoidx]));
1607 ++ifp->if_ierrors;
1608 }
1609 break;
1610 case PROTO_REJ:
1611 {
1612 int catastrophic;
1613 const struct cp *upper;
1614 int i;
1615 uint16_t proto;
1616
1617 catastrophic = 0;
1618 upper = NULL;
1619 proto = p[0] << 8 | p[1];
1620 for (i = 0; i < IDX_COUNT; i++) {
1621 if (cps[i]->proto == proto) {
1622 upper = cps[i];
1623 break;
1624 }
1625 }
1626 if (upper == NULL)
1627 catastrophic++;
1628
1629 if (debug)
1630 log(LOG_INFO,
1631 "%s: %s: RXJ%c (%s) for proto 0x%x (%s/%s)\n",
1632 ifp->if_xname, cp->name, catastrophic ? '-' : '+',
1633 sppp_cp_type_name(h->type), proto,
1634 upper ? upper->name : "unknown",
1635 upper ? sppp_state_name(sp->state[upper->protoidx]) : "?");
1636
1637 /*
1638 * if we got RXJ+ against conf-req, the peer does not implement
1639 * this particular protocol type. terminate the protocol.
1640 */
1641 if (upper && !catastrophic) {
1642 if (sp->state[upper->protoidx] == STATE_REQ_SENT) {
1643 upper->Close(sp);
1644 break;
1645 }
1646 }
1647
1648 /* XXX catastrophic rejects (RXJ-) aren't handled yet. */
1649 switch (sp->state[cp->protoidx]) {
1650 case STATE_CLOSED:
1651 case STATE_STOPPED:
1652 case STATE_REQ_SENT:
1653 case STATE_ACK_SENT:
1654 case STATE_CLOSING:
1655 case STATE_STOPPING:
1656 case STATE_OPENED:
1657 break;
1658 case STATE_ACK_RCVD:
1659 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1660 break;
1661 default:
1662 printf("%s: %s illegal %s in state %s\n",
1663 ifp->if_xname, cp->name,
1664 sppp_cp_type_name(h->type),
1665 sppp_state_name(sp->state[cp->protoidx]));
1666 ++ifp->if_ierrors;
1667 }
1668 break;
1669 }
1670 case DISC_REQ:
1671 if (cp->proto != PPP_LCP)
1672 goto illegal;
1673 /* Discard the packet. */
1674 break;
1675 case ECHO_REQ:
1676 if (cp->proto != PPP_LCP)
1677 goto illegal;
1678 if (sp->state[cp->protoidx] != STATE_OPENED) {
1679 if (debug)
1680 addlog("%s: lcp echo req but lcp closed\n",
1681 ifp->if_xname);
1682 ++ifp->if_ierrors;
1683 break;
1684 }
1685 if (len < 8) {
1686 if (debug)
1687 addlog("%s: invalid lcp echo request "
1688 "packet length: %d bytes\n",
1689 ifp->if_xname, len);
1690 break;
1691 }
1692 memcpy(&u32, h + 1, sizeof u32);
1693 if (ntohl(u32) == sp->lcp.magic) {
1694 /* Line loopback mode detected. */
1695 printf("%s: loopback\n", ifp->if_xname);
1696 if_down(ifp);
1697 IF_PURGE(&sp->pp_cpq);
1698
1699 /* Shut down the PPP link. */
1700 /* XXX */
1701 lcp.Down(sp);
1702 lcp.Up(sp);
1703 break;
1704 }
1705 u32 = htonl(sp->lcp.magic);
1706 memcpy(h + 1, &u32, sizeof u32);
1707 if (debug)
1708 addlog("%s: got lcp echo req, sending echo rep\n",
1709 ifp->if_xname);
1710 sppp_cp_send(sp, PPP_LCP, ECHO_REPLY, h->ident, len - 4,
1711 h + 1);
1712 break;
1713 case ECHO_REPLY:
1714 if (cp->proto != PPP_LCP)
1715 goto illegal;
1716 if (h->ident != sp->lcp.echoid) {
1717 ++ifp->if_ierrors;
1718 break;
1719 }
1720 if (len < 8) {
1721 if (debug)
1722 addlog("%s: lcp invalid echo reply "
1723 "packet length: %d bytes\n",
1724 ifp->if_xname, len);
1725 break;
1726 }
1727 if (debug)
1728 addlog("%s: lcp got echo rep\n",
1729 ifp->if_xname);
1730 memcpy(&u32, h + 1, sizeof u32);
1731 if (ntohl(u32) != sp->lcp.magic)
1732 sp->pp_alivecnt = 0;
1733 break;
1734 default:
1735 /* Unknown packet type -- send Code-Reject packet. */
1736 illegal:
1737 if (debug)
1738 addlog("%s: %s send code-rej for 0x%x\n",
1739 ifp->if_xname, cp->name, h->type);
1740 sppp_cp_send(sp, cp->proto, CODE_REJ,
1741 ++sp->pp_seq[cp->protoidx], m->m_pkthdr.len, h);
1742 ++ifp->if_ierrors;
1743 }
1744 }
1745
1746
1747 /*
1748 * The generic part of all Up/Down/Open/Close/TO event handlers.
1749 * Basically, the state transition handling in the automaton.
1750 */
1751 static void
1752 sppp_up_event(const struct cp *cp, struct sppp *sp)
1753 {
1754 STDDCL;
1755
1756 if (debug)
1757 log(LOG_DEBUG, "%s: %s up(%s)\n",
1758 ifp->if_xname, cp->name,
1759 sppp_state_name(sp->state[cp->protoidx]));
1760
1761 switch (sp->state[cp->protoidx]) {
1762 case STATE_INITIAL:
1763 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1764 break;
1765 case STATE_STARTING:
1766 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1767 (cp->scr)(sp);
1768 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1769 break;
1770 default:
1771 printf("%s: %s illegal up in state %s\n",
1772 ifp->if_xname, cp->name,
1773 sppp_state_name(sp->state[cp->protoidx]));
1774 }
1775 }
1776
1777 static void
1778 sppp_down_event(const struct cp *cp, struct sppp *sp)
1779 {
1780 STDDCL;
1781
1782 if (debug)
1783 log(LOG_DEBUG, "%s: %s down(%s)\n",
1784 ifp->if_xname, cp->name,
1785 sppp_state_name(sp->state[cp->protoidx]));
1786
1787 switch (sp->state[cp->protoidx]) {
1788 case STATE_CLOSED:
1789 case STATE_CLOSING:
1790 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1791 break;
1792 case STATE_STOPPED:
1793 (cp->tls)(sp);
1794 /* fall through */
1795 case STATE_STOPPING:
1796 case STATE_REQ_SENT:
1797 case STATE_ACK_RCVD:
1798 case STATE_ACK_SENT:
1799 sppp_cp_change_state(cp, sp, STATE_STARTING);
1800 break;
1801 case STATE_OPENED:
1802 (cp->tld)(sp);
1803 sppp_cp_change_state(cp, sp, STATE_STARTING);
1804 break;
1805 default:
1806 printf("%s: %s illegal down in state %s\n",
1807 ifp->if_xname, cp->name,
1808 sppp_state_name(sp->state[cp->protoidx]));
1809 }
1810 }
1811
1812
1813 static void
1814 sppp_open_event(const struct cp *cp, struct sppp *sp)
1815 {
1816 STDDCL;
1817
1818 if (debug)
1819 log(LOG_DEBUG, "%s: %s open(%s)\n",
1820 ifp->if_xname, cp->name,
1821 sppp_state_name(sp->state[cp->protoidx]));
1822
1823 switch (sp->state[cp->protoidx]) {
1824 case STATE_INITIAL:
1825 sppp_cp_change_state(cp, sp, STATE_STARTING);
1826 (cp->tls)(sp);
1827 break;
1828 case STATE_STARTING:
1829 break;
1830 case STATE_CLOSED:
1831 sp->rst_counter[cp->protoidx] = sp->lcp.max_configure;
1832 (cp->scr)(sp);
1833 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1834 break;
1835 case STATE_STOPPED:
1836 case STATE_STOPPING:
1837 case STATE_REQ_SENT:
1838 case STATE_ACK_RCVD:
1839 case STATE_ACK_SENT:
1840 case STATE_OPENED:
1841 break;
1842 case STATE_CLOSING:
1843 sppp_cp_change_state(cp, sp, STATE_STOPPING);
1844 break;
1845 }
1846 }
1847
1848
1849 static void
1850 sppp_close_event(const struct cp *cp, struct sppp *sp)
1851 {
1852 STDDCL;
1853
1854 if (debug)
1855 log(LOG_DEBUG, "%s: %s close(%s)\n",
1856 ifp->if_xname, cp->name,
1857 sppp_state_name(sp->state[cp->protoidx]));
1858
1859 switch (sp->state[cp->protoidx]) {
1860 case STATE_INITIAL:
1861 case STATE_CLOSED:
1862 case STATE_CLOSING:
1863 break;
1864 case STATE_STARTING:
1865 sppp_cp_change_state(cp, sp, STATE_INITIAL);
1866 (cp->tlf)(sp);
1867 break;
1868 case STATE_STOPPED:
1869 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1870 break;
1871 case STATE_STOPPING:
1872 sppp_cp_change_state(cp, sp, STATE_CLOSING);
1873 break;
1874 case STATE_OPENED:
1875 (cp->tld)(sp);
1876 /* fall through */
1877 case STATE_REQ_SENT:
1878 case STATE_ACK_RCVD:
1879 case STATE_ACK_SENT:
1880 sp->rst_counter[cp->protoidx] = sp->lcp.max_terminate;
1881 sppp_cp_send(sp, cp->proto, TERM_REQ,
1882 ++sp->pp_seq[cp->protoidx], 0, 0);
1883 sppp_cp_change_state(cp, sp, STATE_CLOSING);
1884 break;
1885 }
1886 }
1887
1888 static void
1889 sppp_to_event(const struct cp *cp, struct sppp *sp)
1890 {
1891 STDDCL;
1892 int s;
1893
1894 s = splnet();
1895 if (debug)
1896 log(LOG_DEBUG, "%s: %s TO(%s) rst_counter = %d\n",
1897 ifp->if_xname, cp->name,
1898 sppp_state_name(sp->state[cp->protoidx]),
1899 sp->rst_counter[cp->protoidx]);
1900
1901 if (--sp->rst_counter[cp->protoidx] < 0)
1902 /* TO- event */
1903 switch (sp->state[cp->protoidx]) {
1904 case STATE_CLOSING:
1905 (cp->tlf)(sp);
1906 sppp_cp_change_state(cp, sp, STATE_CLOSED);
1907 sppp_lcp_check_and_close(sp);
1908 break;
1909 case STATE_STOPPING:
1910 (cp->tlf)(sp);
1911 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1912 sppp_lcp_check_and_close(sp);
1913 break;
1914 case STATE_REQ_SENT:
1915 case STATE_ACK_RCVD:
1916 case STATE_ACK_SENT:
1917 (cp->tlf)(sp);
1918 sppp_cp_change_state(cp, sp, STATE_STOPPED);
1919 sppp_lcp_check_and_close(sp);
1920 break;
1921 }
1922 else
1923 /* TO+ event */
1924 switch (sp->state[cp->protoidx]) {
1925 case STATE_CLOSING:
1926 case STATE_STOPPING:
1927 sppp_cp_send(sp, cp->proto, TERM_REQ,
1928 ++sp->pp_seq[cp->protoidx], 0, 0);
1929 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
1930 cp->TO, sp);
1931 break;
1932 case STATE_REQ_SENT:
1933 case STATE_ACK_RCVD:
1934 (cp->scr)(sp);
1935 /* sppp_cp_change_state() will restart the timer */
1936 sppp_cp_change_state(cp, sp, STATE_REQ_SENT);
1937 break;
1938 case STATE_ACK_SENT:
1939 (cp->scr)(sp);
1940 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
1941 cp->TO, sp);
1942 break;
1943 }
1944
1945 splx(s);
1946 }
1947
1948 /*
1949 * Change the state of a control protocol in the state automaton.
1950 * Takes care of starting/stopping the restart timer.
1951 */
1952 void
1953 sppp_cp_change_state(const struct cp *cp, struct sppp *sp, int newstate)
1954 {
1955 sp->state[cp->protoidx] = newstate;
1956 callout_stop(&sp->ch[cp->protoidx]);
1957 switch (newstate) {
1958 case STATE_INITIAL:
1959 case STATE_STARTING:
1960 case STATE_CLOSED:
1961 case STATE_STOPPED:
1962 case STATE_OPENED:
1963 break;
1964 case STATE_CLOSING:
1965 case STATE_STOPPING:
1966 case STATE_REQ_SENT:
1967 case STATE_ACK_RCVD:
1968 case STATE_ACK_SENT:
1969 callout_reset(&sp->ch[cp->protoidx], sp->lcp.timeout,
1970 cp->TO, sp);
1971 break;
1972 }
1973 }
1974
1975 /*
1976 *--------------------------------------------------------------------------*
1977 * *
1978 * The LCP implementation. *
1979 * *
1980 *--------------------------------------------------------------------------*
1981 */
1982 static void
1983 sppp_lcp_init(struct sppp *sp)
1984 {
1985 sp->lcp.opts = (1 << LCP_OPT_MAGIC);
1986 sp->lcp.magic = 0;
1987 sp->state[IDX_LCP] = STATE_INITIAL;
1988 sp->fail_counter[IDX_LCP] = 0;
1989 sp->pp_seq[IDX_LCP] = 0;
1990 sp->pp_rseq[IDX_LCP] = 0;
1991 sp->lcp.protos = 0;
1992 if (sp->pp_if.if_mtu < PP_MTU) {
1993 sp->lcp.mru = sp->pp_if.if_mtu;
1994 sp->lcp.opts |= (1 << LCP_OPT_MRU);
1995 } else
1996 sp->lcp.mru = PP_MTU;
1997 sp->lcp.their_mru = PP_MTU;
1998
1999 /*
2000 * Initialize counters and timeout values. Note that we don't
2001 * use the 3 seconds suggested in RFC 1661 since we are likely
2002 * running on a fast link. XXX We should probably implement
2003 * the exponential backoff option. Note that these values are
2004 * relevant for all control protocols, not just LCP only.
2005 */
2006 sp->lcp.timeout = 1 * hz;
2007 sp->lcp.max_terminate = 2;
2008 sp->lcp.max_configure = 10;
2009 sp->lcp.max_failure = 10;
2010 callout_init(&sp->ch[IDX_LCP], 0);
2011 }
2012
2013 static void
2014 sppp_lcp_up(struct sppp *sp)
2015 {
2016 STDDCL;
2017
2018 /* Initialize activity timestamp: opening a connection is an activity */
2019 sp->pp_last_receive = sp->pp_last_activity = time_uptime;
2020
2021 /*
2022 * If this interface is passive or dial-on-demand, and we are
2023 * still in Initial state, it means we've got an incoming
2024 * call. Activate the interface.
2025 */
2026 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) != 0) {
2027 if (debug)
2028 log(LOG_DEBUG,
2029 "%s: Up event", ifp->if_xname);
2030 ifp->if_flags |= IFF_RUNNING;
2031 if (sp->state[IDX_LCP] == STATE_INITIAL) {
2032 if (debug)
2033 addlog("(incoming call)\n");
2034 sp->pp_flags |= PP_CALLIN;
2035 lcp.Open(sp);
2036 } else if (debug)
2037 addlog("\n");
2038 } else if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0 &&
2039 (sp->state[IDX_LCP] == STATE_INITIAL)) {
2040 ifp->if_flags |= IFF_RUNNING;
2041 lcp.Open(sp);
2042 }
2043
2044 sppp_up_event(&lcp, sp);
2045 }
2046
2047 static void
2048 sppp_lcp_down(struct sppp *sp)
2049 {
2050 STDDCL;
2051
2052 sppp_down_event(&lcp, sp);
2053
2054 /*
2055 * If this is neither a dial-on-demand nor a passive
2056 * interface, simulate an ``ifconfig down'' action, so the
2057 * administrator can force a redial by another ``ifconfig
2058 * up''. XXX For leased line operation, should we immediately
2059 * try to reopen the connection here?
2060 */
2061 if ((ifp->if_flags & (IFF_AUTO | IFF_PASSIVE)) == 0) {
2062 if (debug)
2063 log(LOG_INFO,
2064 "%s: Down event (carrier loss), taking interface down.\n",
2065 ifp->if_xname);
2066 if_down(ifp);
2067 } else {
2068 if (debug)
2069 log(LOG_DEBUG,
2070 "%s: Down event (carrier loss)\n",
2071 ifp->if_xname);
2072 }
2073 sp->pp_flags &= ~PP_CALLIN;
2074 if (sp->state[IDX_LCP] != STATE_INITIAL)
2075 lcp.Close(sp);
2076 ifp->if_flags &= ~IFF_RUNNING;
2077 }
2078
2079 static void
2080 sppp_lcp_open(struct sppp *sp)
2081 {
2082 /*
2083 * If we are authenticator, negotiate LCP_AUTH
2084 */
2085 if (sp->hisauth.proto != 0)
2086 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
2087 else
2088 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2089 sp->pp_flags &= ~PP_NEEDAUTH;
2090 sppp_open_event(&lcp, sp);
2091 }
2092
2093 static void
2094 sppp_lcp_close(struct sppp *sp)
2095 {
2096 sppp_close_event(&lcp, sp);
2097 }
2098
2099 static void
2100 sppp_lcp_TO(void *cookie)
2101 {
2102 sppp_to_event(&lcp, (struct sppp *)cookie);
2103 }
2104
2105 /*
2106 * Analyze a configure request. Return true if it was agreeable, and
2107 * caused action sca, false if it has been rejected or nak'ed, and
2108 * caused action scn. (The return value is used to make the state
2109 * transition decision in the state automaton.)
2110 */
2111 static int
2112 sppp_lcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2113 {
2114 STDDCL;
2115 u_char *buf, *r, *p;
2116 int origlen, rlen;
2117 uint32_t nmagic;
2118 u_short authproto;
2119
2120 len -= 4;
2121 origlen = len;
2122 buf = r = malloc (len, M_TEMP, M_NOWAIT);
2123 if (! buf)
2124 return (0);
2125
2126 if (debug)
2127 log(LOG_DEBUG, "%s: lcp parse opts:",
2128 ifp->if_xname);
2129
2130 /* pass 1: check for things that need to be rejected */
2131 p = (void *)(h + 1);
2132 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2133 /* Sanity check option length */
2134 if (p[1] > len) {
2135 /*
2136 * Malicious option - drop immediately.
2137 * XXX Maybe we should just RXJ it?
2138 */
2139 addlog("%s: received malicious LCP option 0x%02x, "
2140 "length 0x%02x, (len: 0x%02x) dropping.\n", ifp->if_xname,
2141 p[0], p[1], len);
2142 goto drop;
2143 }
2144 if (debug)
2145 addlog(" %s", sppp_lcp_opt_name(*p));
2146 switch (*p) {
2147 case LCP_OPT_MAGIC:
2148 /* Magic number. */
2149 /* fall through, both are same length */
2150 case LCP_OPT_ASYNC_MAP:
2151 /* Async control character map. */
2152 if (len >= 6 || p[1] == 6)
2153 continue;
2154 if (debug)
2155 addlog(" [invalid]");
2156 break;
2157 case LCP_OPT_MRU:
2158 /* Maximum receive unit. */
2159 if (len >= 4 && p[1] == 4)
2160 continue;
2161 if (debug)
2162 addlog(" [invalid]");
2163 break;
2164 case LCP_OPT_AUTH_PROTO:
2165 if (len < 4) {
2166 if (debug)
2167 addlog(" [invalid]");
2168 break;
2169 }
2170 authproto = (p[2] << 8) + p[3];
2171 if (authproto == PPP_CHAP && p[1] != 5) {
2172 if (debug)
2173 addlog(" [invalid chap len]");
2174 break;
2175 }
2176 if (sp->myauth.proto == 0) {
2177 /* we are not configured to do auth */
2178 if (debug)
2179 addlog(" [not configured]");
2180 break;
2181 }
2182 /*
2183 * Remote want us to authenticate, remember this,
2184 * so we stay in SPPP_PHASE_AUTHENTICATE after LCP got
2185 * up.
2186 */
2187 sp->pp_flags |= PP_NEEDAUTH;
2188 continue;
2189 default:
2190 /* Others not supported. */
2191 if (debug)
2192 addlog(" [rej]");
2193 break;
2194 }
2195 /* Add the option to rejected list. */
2196 bcopy (p, r, p[1]);
2197 r += p[1];
2198 rlen += p[1];
2199 }
2200 if (rlen) {
2201 if (debug)
2202 addlog(" send conf-rej\n");
2203 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2204 goto end;
2205 } else if (debug)
2206 addlog("\n");
2207
2208 /*
2209 * pass 2: check for option values that are unacceptable and
2210 * thus require to be nak'ed.
2211 */
2212 if (debug)
2213 log(LOG_DEBUG, "%s: lcp parse opt values: ",
2214 ifp->if_xname);
2215
2216 p = (void *)(h + 1);
2217 len = origlen;
2218 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2219 if (debug)
2220 addlog(" %s", sppp_lcp_opt_name(*p));
2221 switch (*p) {
2222 case LCP_OPT_MAGIC:
2223 /* Magic number -- extract. */
2224 nmagic = (uint32_t)p[2] << 24 |
2225 (uint32_t)p[3] << 16 | p[4] << 8 | p[5];
2226 if (nmagic != sp->lcp.magic) {
2227 if (debug)
2228 addlog(" 0x%x", nmagic);
2229 continue;
2230 }
2231 /*
2232 * Local and remote magics equal -- loopback?
2233 */
2234 if (sp->pp_loopcnt >= LOOPALIVECNT*5) {
2235 printf ("%s: loopback\n",
2236 ifp->if_xname);
2237 sp->pp_loopcnt = 0;
2238 if (ifp->if_flags & IFF_UP) {
2239 if_down(ifp);
2240 IF_PURGE(&sp->pp_cpq);
2241 /* XXX ? */
2242 lcp.Down(sp);
2243 lcp.Up(sp);
2244 }
2245 } else if (debug)
2246 addlog(" [glitch]");
2247 ++sp->pp_loopcnt;
2248 /*
2249 * We negate our magic here, and NAK it. If
2250 * we see it later in an NAK packet, we
2251 * suggest a new one.
2252 */
2253 nmagic = ~sp->lcp.magic;
2254 /* Gonna NAK it. */
2255 p[2] = nmagic >> 24;
2256 p[3] = nmagic >> 16;
2257 p[4] = nmagic >> 8;
2258 p[5] = nmagic;
2259 break;
2260
2261 case LCP_OPT_ASYNC_MAP:
2262 /*
2263 * Async control character map -- just ignore it.
2264 *
2265 * Quote from RFC 1662, chapter 6:
2266 * To enable this functionality, synchronous PPP
2267 * implementations MUST always respond to the
2268 * Async-Control-Character-Map Configuration
2269 * Option with the LCP Configure-Ack. However,
2270 * acceptance of the Configuration Option does
2271 * not imply that the synchronous implementation
2272 * will do any ACCM mapping. Instead, all such
2273 * octet mapping will be performed by the
2274 * asynchronous-to-synchronous converter.
2275 */
2276 continue;
2277
2278 case LCP_OPT_MRU:
2279 /*
2280 * Maximum receive unit. Always agreeable,
2281 * but ignored by now.
2282 */
2283 sp->lcp.their_mru = p[2] * 256 + p[3];
2284 if (debug)
2285 addlog(" %ld", sp->lcp.their_mru);
2286 continue;
2287
2288 case LCP_OPT_AUTH_PROTO:
2289 authproto = (p[2] << 8) + p[3];
2290 if (sp->myauth.proto != authproto) {
2291 /* not agreed, nak */
2292 if (debug)
2293 addlog(" [mine %s != his %s]",
2294 sppp_proto_name(sp->myauth.proto),
2295 sppp_proto_name(authproto));
2296 p[2] = sp->myauth.proto >> 8;
2297 p[3] = sp->myauth.proto;
2298 break;
2299 }
2300 if (authproto == PPP_CHAP && p[4] != CHAP_MD5) {
2301 if (debug)
2302 addlog(" [chap not MD5]");
2303 p[4] = CHAP_MD5;
2304 break;
2305 }
2306 continue;
2307 }
2308 /* Add the option to nak'ed list. */
2309 bcopy (p, r, p[1]);
2310 r += p[1];
2311 rlen += p[1];
2312 }
2313 if (rlen) {
2314 if (++sp->fail_counter[IDX_LCP] >= sp->lcp.max_failure) {
2315 if (debug)
2316 addlog(" max_failure (%d) exceeded, "
2317 "send conf-rej\n",
2318 sp->lcp.max_failure);
2319 sppp_cp_send(sp, PPP_LCP, CONF_REJ, h->ident, rlen, buf);
2320 } else {
2321 if (debug)
2322 addlog(" send conf-nak\n");
2323 sppp_cp_send(sp, PPP_LCP, CONF_NAK, h->ident, rlen, buf);
2324 }
2325 goto end;
2326 } else {
2327 if (debug)
2328 addlog(" send conf-ack\n");
2329 sp->fail_counter[IDX_LCP] = 0;
2330 sp->pp_loopcnt = 0;
2331 sppp_cp_send(sp, PPP_LCP, CONF_ACK, h->ident, origlen, h + 1);
2332 }
2333
2334 end:
2335 free(buf, M_TEMP);
2336 return (rlen == 0);
2337
2338 drop:
2339 free(buf, M_TEMP);
2340 return -1;
2341 }
2342
2343 /*
2344 * Analyze the LCP Configure-Reject option list, and adjust our
2345 * negotiation.
2346 */
2347 static void
2348 sppp_lcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
2349 {
2350 STDDCL;
2351 u_char *buf, *p;
2352
2353 len -= 4;
2354 buf = malloc (len, M_TEMP, M_NOWAIT);
2355 if (!buf)
2356 return;
2357
2358 if (debug)
2359 log(LOG_DEBUG, "%s: lcp rej opts:",
2360 ifp->if_xname);
2361
2362 p = (void *)(h + 1);
2363 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2364 /* Sanity check option length */
2365 if (p[1] > len) {
2366 /*
2367 * Malicious option - drop immediately.
2368 * XXX Maybe we should just RXJ it?
2369 */
2370 addlog("%s: received malicious LCP option, "
2371 "dropping.\n", ifp->if_xname);
2372 goto drop;
2373 }
2374 if (debug)
2375 addlog(" %s", sppp_lcp_opt_name(*p));
2376 switch (*p) {
2377 case LCP_OPT_MAGIC:
2378 /* Magic number -- can't use it, use 0 */
2379 sp->lcp.opts &= ~(1 << LCP_OPT_MAGIC);
2380 sp->lcp.magic = 0;
2381 break;
2382 case LCP_OPT_MRU:
2383 /*
2384 * We try to negotiate a lower MRU if the underlying
2385 * link's MTU is less than PP_MTU (e.g. PPPoE). If the
2386 * peer rejects this lower rate, fallback to the
2387 * default.
2388 */
2389 if (debug) {
2390 addlog("%s: warning: peer rejected our MRU of "
2391 "%ld bytes. Defaulting to %d bytes\n",
2392 ifp->if_xname, sp->lcp.mru, PP_MTU);
2393 }
2394 sp->lcp.opts &= ~(1 << LCP_OPT_MRU);
2395 sp->lcp.mru = PP_MTU;
2396 break;
2397 case LCP_OPT_AUTH_PROTO:
2398 /*
2399 * Peer doesn't want to authenticate himself,
2400 * deny unless this is a dialout call, and
2401 * SPPP_AUTHFLAG_NOCALLOUT is set.
2402 */
2403 if ((sp->pp_flags & PP_CALLIN) == 0 &&
2404 (sp->hisauth.flags & SPPP_AUTHFLAG_NOCALLOUT) != 0) {
2405 if (debug)
2406 addlog(" [don't insist on auth "
2407 "for callout]");
2408 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
2409 break;
2410 }
2411 if (debug)
2412 addlog("[access denied]\n");
2413 lcp.Close(sp);
2414 break;
2415 }
2416 }
2417 if (debug)
2418 addlog("\n");
2419 drop:
2420 free(buf, M_TEMP);
2421 return;
2422 }
2423
2424 /*
2425 * Analyze the LCP Configure-NAK option list, and adjust our
2426 * negotiation.
2427 */
2428 static void
2429 sppp_lcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
2430 {
2431 STDDCL;
2432 u_char *buf, *p;
2433 uint32_t magic;
2434
2435 len -= 4;
2436 buf = malloc (len, M_TEMP, M_NOWAIT);
2437 if (!buf)
2438 return;
2439
2440 if (debug)
2441 log(LOG_DEBUG, "%s: lcp nak opts:",
2442 ifp->if_xname);
2443
2444 p = (void *)(h + 1);
2445 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
2446 /* Sanity check option length */
2447 if (p[1] > len) {
2448 /*
2449 * Malicious option - drop immediately.
2450 * XXX Maybe we should just RXJ it?
2451 */
2452 addlog("%s: received malicious LCP option, "
2453 "dropping.\n", ifp->if_xname);
2454 goto drop;
2455 }
2456 if (debug)
2457 addlog(" %s", sppp_lcp_opt_name(*p));
2458 switch (*p) {
2459 case LCP_OPT_MAGIC:
2460 /* Magic number -- renegotiate */
2461 if ((sp->lcp.opts & (1 << LCP_OPT_MAGIC)) &&
2462 len >= 6 && p[1] == 6) {
2463 magic = (uint32_t)p[2] << 24 |
2464 (uint32_t)p[3] << 16 | p[4] << 8 | p[5];
2465 /*
2466 * If the remote magic is our negated one,
2467 * this looks like a loopback problem.
2468 * Suggest a new magic to make sure.
2469 */
2470 if (magic == ~sp->lcp.magic) {
2471 if (debug)
2472 addlog(" magic glitch");
2473 sp->lcp.magic = arc4random();
2474 } else {
2475 sp->lcp.magic = magic;
2476 if (debug)
2477 addlog(" %d", magic);
2478 }
2479 }
2480 break;
2481 case LCP_OPT_MRU:
2482 /*
2483 * Peer wants to advise us to negotiate an MRU.
2484 * Agree on it if it's reasonable, or use
2485 * default otherwise.
2486 */
2487 if (len >= 4 && p[1] == 4) {
2488 u_int mru = p[2] * 256 + p[3];
2489 if (debug)
2490 addlog(" %d", mru);
2491 if (mru < PPP_MINMRU || mru > sp->pp_if.if_mtu)
2492 mru = sp->pp_if.if_mtu;
2493 sp->lcp.mru = mru;
2494 sp->lcp.opts |= (1 << LCP_OPT_MRU);
2495 }
2496 break;
2497 case LCP_OPT_AUTH_PROTO:
2498 /*
2499 * Peer doesn't like our authentication method,
2500 * deny.
2501 */
2502 if (debug)
2503 addlog("[access denied]\n");
2504 lcp.Close(sp);
2505 break;
2506 }
2507 }
2508 if (debug)
2509 addlog("\n");
2510 drop:
2511 free(buf, M_TEMP);
2512 return;
2513 }
2514
2515 static void
2516 sppp_lcp_tlu(struct sppp *sp)
2517 {
2518 STDDCL;
2519 int i;
2520 uint32_t mask;
2521
2522 /* XXX ? */
2523 if (! (ifp->if_flags & IFF_UP) &&
2524 (ifp->if_flags & IFF_RUNNING)) {
2525 /* Coming out of loopback mode. */
2526 if_up(ifp);
2527 }
2528
2529 for (i = 0; i < IDX_COUNT; i++)
2530 if ((cps[i])->flags & CP_QUAL)
2531 (cps[i])->Open(sp);
2532
2533 if ((sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0 ||
2534 (sp->pp_flags & PP_NEEDAUTH) != 0)
2535 sp->pp_phase = SPPP_PHASE_AUTHENTICATE;
2536 else
2537 sp->pp_phase = SPPP_PHASE_NETWORK;
2538
2539 if (debug)
2540 {
2541 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname,
2542 sppp_phase_name(sp->pp_phase));
2543 }
2544
2545 /*
2546 * Open all authentication protocols. This is even required
2547 * if we already proceeded to network phase, since it might be
2548 * that remote wants us to authenticate, so we might have to
2549 * send a PAP request. Undesired authentication protocols
2550 * don't do anything when they get an Open event.
2551 */
2552 for (i = 0; i < IDX_COUNT; i++)
2553 if ((cps[i])->flags & CP_AUTH)
2554 (cps[i])->Open(sp);
2555
2556 if (sp->pp_phase == SPPP_PHASE_NETWORK) {
2557 /* Notify all NCPs. */
2558 for (i = 0; i < IDX_COUNT; i++)
2559 if ((cps[i])->flags & CP_NCP)
2560 (cps[i])->Open(sp);
2561 }
2562
2563 /* Send Up events to all started protos. */
2564 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2565 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0)
2566 (cps[i])->Up(sp);
2567
2568 /* notify low-level driver of state change */
2569 if (sp->pp_chg)
2570 sp->pp_chg(sp, (int)sp->pp_phase);
2571
2572 if (sp->pp_phase == SPPP_PHASE_NETWORK)
2573 /* if no NCP is starting, close down */
2574 sppp_lcp_check_and_close(sp);
2575 }
2576
2577 static void
2578 sppp_lcp_tld(struct sppp *sp)
2579 {
2580 STDDCL;
2581 int i;
2582 uint32_t mask;
2583
2584 sp->pp_phase = SPPP_PHASE_TERMINATE;
2585
2586 if (debug)
2587 {
2588 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname,
2589 sppp_phase_name(sp->pp_phase));
2590 }
2591
2592 /*
2593 * Take upper layers down. We send the Down event first and
2594 * the Close second to prevent the upper layers from sending
2595 * ``a flurry of terminate-request packets'', as the RFC
2596 * describes it.
2597 */
2598 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2599 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_LCP) == 0) {
2600 (cps[i])->Down(sp);
2601 (cps[i])->Close(sp);
2602 }
2603 }
2604
2605 static void
2606 sppp_lcp_tls(struct sppp *sp)
2607 {
2608 STDDCL;
2609
2610 if (sp->pp_max_auth_fail != 0 && sp->pp_auth_failures >= sp->pp_max_auth_fail) {
2611 printf("%s: authentication failed %d times, not retrying again\n",
2612 sp->pp_if.if_xname, sp->pp_auth_failures);
2613 if_down(&sp->pp_if);
2614 return;
2615 }
2616
2617 sp->pp_phase = SPPP_PHASE_ESTABLISH;
2618
2619 if (debug)
2620 {
2621 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname,
2622 sppp_phase_name(sp->pp_phase));
2623 }
2624
2625 /* Notify lower layer if desired. */
2626 if (sp->pp_tls)
2627 (sp->pp_tls)(sp);
2628 }
2629
2630 static void
2631 sppp_lcp_tlf(struct sppp *sp)
2632 {
2633 STDDCL;
2634
2635 sp->pp_phase = SPPP_PHASE_DEAD;
2636
2637 if (debug)
2638 {
2639 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname,
2640 sppp_phase_name(sp->pp_phase));
2641 }
2642
2643 /* Notify lower layer if desired. */
2644 if (sp->pp_tlf)
2645 (sp->pp_tlf)(sp);
2646 }
2647
2648 static void
2649 sppp_lcp_scr(struct sppp *sp)
2650 {
2651 char opt[6 /* magicnum */ + 4 /* mru */ + 5 /* chap */];
2652 int i = 0;
2653 u_short authproto;
2654
2655 if (sp->lcp.opts & (1 << LCP_OPT_MAGIC)) {
2656 if (! sp->lcp.magic)
2657 sp->lcp.magic = arc4random();
2658 opt[i++] = LCP_OPT_MAGIC;
2659 opt[i++] = 6;
2660 opt[i++] = sp->lcp.magic >> 24;
2661 opt[i++] = sp->lcp.magic >> 16;
2662 opt[i++] = sp->lcp.magic >> 8;
2663 opt[i++] = sp->lcp.magic;
2664 }
2665
2666 if (sp->lcp.opts & (1 << LCP_OPT_MRU)) {
2667 opt[i++] = LCP_OPT_MRU;
2668 opt[i++] = 4;
2669 opt[i++] = sp->lcp.mru >> 8;
2670 opt[i++] = sp->lcp.mru;
2671 }
2672
2673 if (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) {
2674 authproto = sp->hisauth.proto;
2675 opt[i++] = LCP_OPT_AUTH_PROTO;
2676 opt[i++] = authproto == PPP_CHAP? 5: 4;
2677 opt[i++] = authproto >> 8;
2678 opt[i++] = authproto;
2679 if (authproto == PPP_CHAP)
2680 opt[i++] = CHAP_MD5;
2681 }
2682
2683 sp->confid[IDX_LCP] = ++sp->pp_seq[IDX_LCP];
2684 sppp_cp_send(sp, PPP_LCP, CONF_REQ, sp->confid[IDX_LCP], i, &opt);
2685 }
2686
2687 /*
2688 * Check the open NCPs, return true if at least one NCP is open.
2689 */
2690 static int
2691 sppp_ncp_check(struct sppp *sp)
2692 {
2693 int i, mask;
2694
2695 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
2696 if ((sp->lcp.protos & mask) && (cps[i])->flags & CP_NCP)
2697 return 1;
2698 return 0;
2699 }
2700
2701 /*
2702 * Re-check the open NCPs and see if we should terminate the link.
2703 * Called by the NCPs during their tlf action handling.
2704 */
2705 static void
2706 sppp_lcp_check_and_close(struct sppp *sp)
2707 {
2708
2709 if (sp->pp_phase < SPPP_PHASE_NETWORK)
2710 /* don't bother, we are already going down */
2711 return;
2712
2713 if (sppp_ncp_check(sp))
2714 return;
2715
2716 lcp.Close(sp);
2717 }
2718
2719
2720 /*
2721 *--------------------------------------------------------------------------*
2722 * *
2723 * The IPCP implementation. *
2724 * *
2725 *--------------------------------------------------------------------------*
2726 */
2727
2728 static void
2729 sppp_ipcp_init(struct sppp *sp)
2730 {
2731 sp->ipcp.opts = 0;
2732 sp->ipcp.flags = 0;
2733 sp->state[IDX_IPCP] = STATE_INITIAL;
2734 sp->fail_counter[IDX_IPCP] = 0;
2735 sp->pp_seq[IDX_IPCP] = 0;
2736 sp->pp_rseq[IDX_IPCP] = 0;
2737 callout_init(&sp->ch[IDX_IPCP], 0);
2738 }
2739
2740 static void
2741 sppp_ipcp_up(struct sppp *sp)
2742 {
2743 sppp_up_event(&ipcp, sp);
2744 }
2745
2746 static void
2747 sppp_ipcp_down(struct sppp *sp)
2748 {
2749 sppp_down_event(&ipcp, sp);
2750 }
2751
2752 static void
2753 sppp_ipcp_open(struct sppp *sp)
2754 {
2755 STDDCL;
2756 uint32_t myaddr, hisaddr;
2757
2758 sp->ipcp.flags &= ~(IPCP_HISADDR_SEEN|IPCP_MYADDR_SEEN|IPCP_MYADDR_DYN|IPCP_HISADDR_DYN);
2759 sp->ipcp.req_myaddr = 0;
2760 sp->ipcp.req_hisaddr = 0;
2761 memset(&sp->dns_addrs, 0, sizeof sp->dns_addrs);
2762
2763 #ifdef INET
2764 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
2765 #else
2766 myaddr = hisaddr = 0;
2767 #endif
2768 /*
2769 * If we don't have his address, this probably means our
2770 * interface doesn't want to talk IP at all. (This could
2771 * be the case if somebody wants to speak only IPX, for
2772 * example.) Don't open IPCP in this case.
2773 */
2774 if (hisaddr == 0) {
2775 /* XXX this message should go away */
2776 if (debug)
2777 log(LOG_DEBUG, "%s: ipcp_open(): no IP interface\n",
2778 ifp->if_xname);
2779 return;
2780 }
2781
2782 if (myaddr == 0) {
2783 /*
2784 * I don't have an assigned address, so i need to
2785 * negotiate my address.
2786 */
2787 sp->ipcp.flags |= IPCP_MYADDR_DYN;
2788 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
2789 }
2790 if (hisaddr == 1) {
2791 /*
2792 * XXX - remove this hack!
2793 * remote has no valid address, we need to get one assigned.
2794 */
2795 sp->ipcp.flags |= IPCP_HISADDR_DYN;
2796 }
2797 sppp_open_event(&ipcp, sp);
2798 }
2799
2800 static void
2801 sppp_ipcp_close(struct sppp *sp)
2802 {
2803 STDDCL;
2804
2805 sppp_close_event(&ipcp, sp);
2806 #ifdef INET
2807 if (sp->ipcp.flags & (IPCP_MYADDR_DYN|IPCP_HISADDR_DYN))
2808 /*
2809 * Some address was dynamic, clear it again.
2810 */
2811 sppp_clear_ip_addrs(sp);
2812 #endif
2813
2814 if (sp->pp_saved_mtu > 0) {
2815 ifp->if_mtu = sp->pp_saved_mtu;
2816 sp->pp_saved_mtu = 0;
2817 if (debug)
2818 log(LOG_DEBUG,
2819 "%s: resetting MTU to %" PRIu64 " bytes\n",
2820 ifp->if_xname, ifp->if_mtu);
2821 }
2822 }
2823
2824 static void
2825 sppp_ipcp_TO(void *cookie)
2826 {
2827 sppp_to_event(&ipcp, (struct sppp *)cookie);
2828 }
2829
2830 /*
2831 * Analyze a configure request. Return true if it was agreeable, and
2832 * caused action sca, false if it has been rejected or nak'ed, and
2833 * caused action scn. (The return value is used to make the state
2834 * transition decision in the state automaton.)
2835 */
2836 static int
2837 sppp_ipcp_RCR(struct sppp *sp, struct lcp_header *h, int len)
2838 {
2839 u_char *buf, *r, *p;
2840 struct ifnet *ifp = &sp->pp_if;
2841 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
2842 uint32_t hisaddr, desiredaddr;
2843
2844 len -= 4;
2845 origlen = len;
2846 /*
2847 * Make sure to allocate a buf that can at least hold a
2848 * conf-nak with an `address' option. We might need it below.
2849 */
2850 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
2851 if (! buf)
2852 return (0);
2853
2854 /* pass 1: see if we can recognize them */
2855 if (debug)
2856 log(LOG_DEBUG, "%s: ipcp parse opts:",
2857 ifp->if_xname);
2858 p = (void *)(h + 1);
2859 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2860 /* Sanity check option length */
2861 if (p[1] > len) {
2862 /* XXX should we just RXJ? */
2863 addlog("%s: malicious IPCP option received, dropping\n",
2864 ifp->if_xname);
2865 goto drop;
2866 }
2867 if (debug)
2868 addlog(" %s", sppp_ipcp_opt_name(*p));
2869 switch (*p) {
2870 #ifdef notyet
2871 case IPCP_OPT_COMPRESSION:
2872 if (len >= 6 && p[1] >= 6) {
2873 /* correctly formed compress option */
2874 continue;
2875 }
2876 if (debug)
2877 addlog(" [invalid]");
2878 break;
2879 #endif
2880 case IPCP_OPT_ADDRESS:
2881 if (len >= 6 && p[1] == 6) {
2882 /* correctly formed address option */
2883 continue;
2884 }
2885 if (debug)
2886 addlog(" [invalid]");
2887 break;
2888 default:
2889 /* Others not supported. */
2890 if (debug)
2891 addlog(" [rej]");
2892 break;
2893 }
2894 /* Add the option to rejected list. */
2895 bcopy (p, r, p[1]);
2896 r += p[1];
2897 rlen += p[1];
2898 }
2899 if (rlen) {
2900 if (debug)
2901 addlog(" send conf-rej\n");
2902 sppp_cp_send(sp, PPP_IPCP, CONF_REJ, h->ident, rlen, buf);
2903 goto end;
2904 } else if (debug)
2905 addlog("\n");
2906
2907 /* pass 2: parse option values */
2908 if (sp->ipcp.flags & IPCP_HISADDR_SEEN)
2909 hisaddr = sp->ipcp.req_hisaddr; /* we already aggreed on that */
2910 else
2911 #ifdef INET
2912 sppp_get_ip_addrs(sp, 0, &hisaddr, 0); /* user configuration */
2913 #else
2914 hisaddr = 0;
2915 #endif
2916 if (debug)
2917 log(LOG_DEBUG, "%s: ipcp parse opt values: ",
2918 ifp->if_xname);
2919 p = (void *)(h + 1);
2920 len = origlen;
2921 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
2922 if (debug)
2923 addlog(" %s", sppp_ipcp_opt_name(*p));
2924 switch (*p) {
2925 #ifdef notyet
2926 case IPCP_OPT_COMPRESSION:
2927 continue;
2928 #endif
2929 case IPCP_OPT_ADDRESS:
2930 desiredaddr = p[2] << 24 | p[3] << 16 |
2931 p[4] << 8 | p[5];
2932 if (desiredaddr == hisaddr ||
2933 ((sp->ipcp.flags & IPCP_HISADDR_DYN) && desiredaddr != 0)) {
2934 /*
2935 * Peer's address is same as our value,
2936 * this is agreeable. Gonna conf-ack
2937 * it.
2938 */
2939 if (debug)
2940 addlog(" %s [ack]",
2941 sppp_dotted_quad(hisaddr));
2942 /* record that we've seen it already */
2943 sp->ipcp.flags |= IPCP_HISADDR_SEEN;
2944 sp->ipcp.req_hisaddr = desiredaddr;
2945 hisaddr = desiredaddr;
2946 continue;
2947 }
2948 /*
2949 * The address wasn't agreeable. This is either
2950 * he sent us 0.0.0.0, asking to assign him an
2951 * address, or he send us another address not
2952 * matching our value. Either case, we gonna
2953 * conf-nak it with our value.
2954 */
2955 if (debug) {
2956 if (desiredaddr == 0)
2957 addlog(" [addr requested]");
2958 else
2959 addlog(" %s [not agreed]",
2960 sppp_dotted_quad(desiredaddr));
2961 }
2962
2963 p[2] = hisaddr >> 24;
2964 p[3] = hisaddr >> 16;
2965 p[4] = hisaddr >> 8;
2966 p[5] = hisaddr;
2967 break;
2968 }
2969 /* Add the option to nak'ed list. */
2970 bcopy (p, r, p[1]);
2971 r += p[1];
2972 rlen += p[1];
2973 }
2974
2975 /*
2976 * If we are about to conf-ack the request, but haven't seen
2977 * his address so far, gonna conf-nak it instead, with the
2978 * `address' option present and our idea of his address being
2979 * filled in there, to request negotiation of both addresses.
2980 *
2981 * XXX This can result in an endless req - nak loop if peer
2982 * doesn't want to send us his address. Q: What should we do
2983 * about it? XXX A: implement the max-failure counter.
2984 */
2985 if (rlen == 0 && !(sp->ipcp.flags & IPCP_HISADDR_SEEN)) {
2986 buf[0] = IPCP_OPT_ADDRESS;
2987 buf[1] = 6;
2988 buf[2] = hisaddr >> 24;
2989 buf[3] = hisaddr >> 16;
2990 buf[4] = hisaddr >> 8;
2991 buf[5] = hisaddr;
2992 rlen = 6;
2993 if (debug)
2994 addlog(" still need hisaddr");
2995 }
2996
2997 if (rlen) {
2998 if (debug)
2999 addlog(" send conf-nak\n");
3000 sppp_cp_send(sp, PPP_IPCP, CONF_NAK, h->ident, rlen, buf);
3001 } else {
3002 if (debug)
3003 addlog(" send conf-ack\n");
3004 sppp_cp_send(sp, PPP_IPCP, CONF_ACK, h->ident, origlen, h + 1);
3005 }
3006
3007 end:
3008 free(buf, M_TEMP);
3009 return (rlen == 0);
3010
3011 drop:
3012 free(buf, M_TEMP);
3013 return -1;
3014 }
3015
3016 /*
3017 * Analyze the IPCP Configure-Reject option list, and adjust our
3018 * negotiation.
3019 */
3020 static void
3021 sppp_ipcp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3022 {
3023 u_char *buf, *p;
3024 struct ifnet *ifp = &sp->pp_if;
3025 int debug = ifp->if_flags & IFF_DEBUG;
3026
3027 len -= 4;
3028 buf = malloc (len, M_TEMP, M_NOWAIT);
3029 if (!buf)
3030 return;
3031
3032 if (debug)
3033 log(LOG_DEBUG, "%s: ipcp rej opts:",
3034 ifp->if_xname);
3035
3036 p = (void *)(h + 1);
3037 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3038 /* Sanity check option length */
3039 if (p[1] > len) {
3040 /* XXX should we just RXJ? */
3041 addlog("%s: malicious IPCP option received, dropping\n",
3042 ifp->if_xname);
3043 goto drop;
3044 }
3045 if (debug)
3046 addlog(" %s", sppp_ipcp_opt_name(*p));
3047 switch (*p) {
3048 case IPCP_OPT_ADDRESS:
3049 /*
3050 * Peer doesn't grok address option. This is
3051 * bad. XXX Should we better give up here?
3052 */
3053 sp->ipcp.opts &= ~(1 << IPCP_OPT_ADDRESS);
3054 break;
3055 #ifdef notyet
3056 case IPCP_OPT_COMPRESS:
3057 sp->ipcp.opts &= ~(1 << IPCP_OPT_COMPRESS);
3058 break;
3059 #endif
3060 }
3061 }
3062 if (debug)
3063 addlog("\n");
3064 drop:
3065 free(buf, M_TEMP);
3066 return;
3067 }
3068
3069 /*
3070 * Analyze the IPCP Configure-NAK option list, and adjust our
3071 * negotiation.
3072 */
3073 static void
3074 sppp_ipcp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3075 {
3076 u_char *p;
3077 struct ifnet *ifp = &sp->pp_if;
3078 int debug = ifp->if_flags & IFF_DEBUG;
3079 uint32_t wantaddr;
3080
3081 len -= 4;
3082
3083 if (debug)
3084 log(LOG_DEBUG, "%s: ipcp nak opts:",
3085 ifp->if_xname);
3086
3087 p = (void *)(h + 1);
3088 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3089 /* Sanity check option length */
3090 if (p[1] > len) {
3091 /* XXX should we just RXJ? */
3092 addlog("%s: malicious IPCP option received, dropping\n",
3093 ifp->if_xname);
3094 return;
3095 }
3096 if (debug)
3097 addlog(" %s", sppp_ipcp_opt_name(*p));
3098 switch (*p) {
3099 case IPCP_OPT_ADDRESS:
3100 /*
3101 * Peer doesn't like our local IP address. See
3102 * if we can do something for him. We'll drop
3103 * him our address then.
3104 */
3105 if (len >= 6 && p[1] == 6) {
3106 wantaddr = p[2] << 24 | p[3] << 16 |
3107 p[4] << 8 | p[5];
3108 sp->ipcp.opts |= (1 << IPCP_OPT_ADDRESS);
3109 if (debug)
3110 addlog(" [wantaddr %s]",
3111 sppp_dotted_quad(wantaddr));
3112 /*
3113 * When doing dynamic address assignment,
3114 * we accept his offer. Otherwise, we
3115 * ignore it and thus continue to negotiate
3116 * our already existing value.
3117 */
3118 if (sp->ipcp.flags & IPCP_MYADDR_DYN) {
3119 if (debug)
3120 addlog(" [agree]");
3121 sp->ipcp.flags |= IPCP_MYADDR_SEEN;
3122 sp->ipcp.req_myaddr = wantaddr;
3123 }
3124 }
3125 break;
3126
3127 case IPCP_OPT_PRIMDNS:
3128 if (len >= 6 && p[1] == 6) {
3129 sp->dns_addrs[0] = p[2] << 24 | p[3] << 16 |
3130 p[4] << 8 | p[5];
3131 }
3132 break;
3133
3134 case IPCP_OPT_SECDNS:
3135 if (len >= 6 && p[1] == 6) {
3136 sp->dns_addrs[1] = p[2] << 24 | p[3] << 16 |
3137 p[4] << 8 | p[5];
3138 }
3139 break;
3140 #ifdef notyet
3141 case IPCP_OPT_COMPRESS:
3142 /*
3143 * Peer wants different compression parameters.
3144 */
3145 break;
3146 #endif
3147 }
3148 }
3149 if (debug)
3150 addlog("\n");
3151 }
3152
3153 static void
3154 sppp_ipcp_tlu(struct sppp *sp)
3155 {
3156 #ifdef INET
3157 /* we are up. Set addresses and notify anyone interested */
3158 STDDCL;
3159 uint32_t myaddr, hisaddr;
3160
3161 sppp_get_ip_addrs(sp, &myaddr, &hisaddr, 0);
3162 if ((sp->ipcp.flags & IPCP_MYADDR_DYN) && (sp->ipcp.flags & IPCP_MYADDR_SEEN))
3163 myaddr = sp->ipcp.req_myaddr;
3164 if ((sp->ipcp.flags & IPCP_HISADDR_DYN) && (sp->ipcp.flags & IPCP_HISADDR_SEEN))
3165 hisaddr = sp->ipcp.req_hisaddr;
3166 sppp_set_ip_addrs(sp, myaddr, hisaddr);
3167
3168 if (ifp->if_mtu > sp->lcp.their_mru) {
3169 sp->pp_saved_mtu = ifp->if_mtu;
3170 ifp->if_mtu = sp->lcp.their_mru;
3171 if (debug)
3172 log(LOG_DEBUG,
3173 "%s: setting MTU to %" PRIu64 " bytes\n",
3174 ifp->if_xname, ifp->if_mtu);
3175 }
3176
3177 if (sp->pp_con)
3178 sp->pp_con(sp);
3179 #endif
3180 }
3181
3182 static void
3183 sppp_ipcp_tld(struct sppp *sp)
3184 {
3185 }
3186
3187 static void
3188 sppp_ipcp_tls(struct sppp *sp)
3189 {
3190 /* indicate to LCP that it must stay alive */
3191 sp->lcp.protos |= (1 << IDX_IPCP);
3192 }
3193
3194 static void
3195 sppp_ipcp_tlf(struct sppp *sp)
3196 {
3197 /* we no longer need LCP */
3198 sp->lcp.protos &= ~(1 << IDX_IPCP);
3199 }
3200
3201 static void
3202 sppp_ipcp_scr(struct sppp *sp)
3203 {
3204 char opt[6 /* compression */ + 6 /* address */ + 12 /* dns addresses */];
3205 #ifdef INET
3206 uint32_t ouraddr;
3207 #endif
3208 int i = 0;
3209
3210 #ifdef notyet
3211 if (sp->ipcp.opts & (1 << IPCP_OPT_COMPRESSION)) {
3212 opt[i++] = IPCP_OPT_COMPRESSION;
3213 opt[i++] = 6;
3214 opt[i++] = 0; /* VJ header compression */
3215 opt[i++] = 0x2d; /* VJ header compression */
3216 opt[i++] = max_slot_id;
3217 opt[i++] = comp_slot_id;
3218 }
3219 #endif
3220
3221 #ifdef INET
3222 if (sp->ipcp.opts & (1 << IPCP_OPT_ADDRESS)) {
3223 if (sp->ipcp.flags & IPCP_MYADDR_SEEN)
3224 ouraddr = sp->ipcp.req_myaddr; /* not sure if this can ever happen */
3225 else
3226 sppp_get_ip_addrs(sp, &ouraddr, 0, 0);
3227 opt[i++] = IPCP_OPT_ADDRESS;
3228 opt[i++] = 6;
3229 opt[i++] = ouraddr >> 24;
3230 opt[i++] = ouraddr >> 16;
3231 opt[i++] = ouraddr >> 8;
3232 opt[i++] = ouraddr;
3233 }
3234 #endif
3235
3236 if (sp->query_dns & 1) {
3237 opt[i++] = IPCP_OPT_PRIMDNS;
3238 opt[i++] = 6;
3239 opt[i++] = sp->dns_addrs[0] >> 24;
3240 opt[i++] = sp->dns_addrs[0] >> 16;
3241 opt[i++] = sp->dns_addrs[0] >> 8;
3242 opt[i++] = sp->dns_addrs[0];
3243 }
3244 if (sp->query_dns & 2) {
3245 opt[i++] = IPCP_OPT_SECDNS;
3246 opt[i++] = 6;
3247 opt[i++] = sp->dns_addrs[1] >> 24;
3248 opt[i++] = sp->dns_addrs[1] >> 16;
3249 opt[i++] = sp->dns_addrs[1] >> 8;
3250 opt[i++] = sp->dns_addrs[1];
3251 }
3252
3253 sp->confid[IDX_IPCP] = ++sp->pp_seq[IDX_IPCP];
3254 sppp_cp_send(sp, PPP_IPCP, CONF_REQ, sp->confid[IDX_IPCP], i, &opt);
3255 }
3256
3257
3258 /*
3259 *--------------------------------------------------------------------------*
3260 * *
3261 * The IPv6CP implementation. *
3262 * *
3263 *--------------------------------------------------------------------------*
3264 */
3265
3266 #ifdef INET6
3267 static void
3268 sppp_ipv6cp_init(struct sppp *sp)
3269 {
3270 sp->ipv6cp.opts = 0;
3271 sp->ipv6cp.flags = 0;
3272 sp->state[IDX_IPV6CP] = STATE_INITIAL;
3273 sp->fail_counter[IDX_IPV6CP] = 0;
3274 sp->pp_seq[IDX_IPV6CP] = 0;
3275 sp->pp_rseq[IDX_IPV6CP] = 0;
3276 callout_init(&sp->ch[IDX_IPV6CP], 0);
3277 }
3278
3279 static void
3280 sppp_ipv6cp_up(struct sppp *sp)
3281 {
3282 sppp_up_event(&ipv6cp, sp);
3283 }
3284
3285 static void
3286 sppp_ipv6cp_down(struct sppp *sp)
3287 {
3288 sppp_down_event(&ipv6cp, sp);
3289 }
3290
3291 static void
3292 sppp_ipv6cp_open(struct sppp *sp)
3293 {
3294 STDDCL;
3295 struct in6_addr myaddr, hisaddr;
3296
3297 #ifdef IPV6CP_MYIFID_DYN
3298 sp->ipv6cp.flags &= ~(IPV6CP_MYIFID_SEEN|IPV6CP_MYIFID_DYN);
3299 #else
3300 sp->ipv6cp.flags &= ~IPV6CP_MYIFID_SEEN;
3301 #endif
3302
3303 sppp_get_ip6_addrs(sp, &myaddr, &hisaddr, 0);
3304 /*
3305 * If we don't have our address, this probably means our
3306 * interface doesn't want to talk IPv6 at all. (This could
3307 * be the case if somebody wants to speak only IPX, for
3308 * example.) Don't open IPv6CP in this case.
3309 */
3310 if (IN6_IS_ADDR_UNSPECIFIED(&myaddr)) {
3311 /* XXX this message should go away */
3312 if (debug)
3313 log(LOG_DEBUG, "%s: ipv6cp_open(): no IPv6 interface\n",
3314 ifp->if_xname);
3315 return;
3316 }
3317
3318 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3319 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3320 sppp_open_event(&ipv6cp, sp);
3321 }
3322
3323 static void
3324 sppp_ipv6cp_close(struct sppp *sp)
3325 {
3326 sppp_close_event(&ipv6cp, sp);
3327 }
3328
3329 static void
3330 sppp_ipv6cp_TO(void *cookie)
3331 {
3332 sppp_to_event(&ipv6cp, (struct sppp *)cookie);
3333 }
3334
3335 /*
3336 * Analyze a configure request. Return true if it was agreeable, and
3337 * caused action sca, false if it has been rejected or nak'ed, and
3338 * caused action scn. (The return value is used to make the state
3339 * transition decision in the state automaton.)
3340 */
3341 static int
3342 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h, int len)
3343 {
3344 u_char *buf, *r, *p;
3345 struct ifnet *ifp = &sp->pp_if;
3346 int rlen, origlen, debug = ifp->if_flags & IFF_DEBUG;
3347 struct in6_addr myaddr, desiredaddr, suggestaddr;
3348 int ifidcount;
3349 int type;
3350 int collision, nohisaddr;
3351
3352 len -= 4;
3353 origlen = len;
3354 /*
3355 * Make sure to allocate a buf that can at least hold a
3356 * conf-nak with an `address' option. We might need it below.
3357 */
3358 buf = r = malloc ((len < 6? 6: len), M_TEMP, M_NOWAIT);
3359 if (! buf)
3360 return (0);
3361
3362 /* pass 1: see if we can recognize them */
3363 if (debug)
3364 log(LOG_DEBUG, "%s: ipv6cp parse opts:",
3365 ifp->if_xname);
3366 p = (void *)(h + 1);
3367 ifidcount = 0;
3368 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3369 /* Sanity check option length */
3370 if (p[1] > len) {
3371 /* XXX just RXJ? */
3372 addlog("%s: received malicious IPCPv6 option, "
3373 "dropping\n", ifp->if_xname);
3374 goto drop;
3375 }
3376 if (debug)
3377 addlog(" %s", sppp_ipv6cp_opt_name(*p));
3378 switch (*p) {
3379 case IPV6CP_OPT_IFID:
3380 if (len >= 10 && p[1] == 10 && ifidcount == 0) {
3381 /* correctly formed address option */
3382 ifidcount++;
3383 continue;
3384 }
3385 if (debug)
3386 addlog(" [invalid]");
3387 break;
3388 #ifdef notyet
3389 case IPV6CP_OPT_COMPRESSION:
3390 if (len >= 4 && p[1] >= 4) {
3391 /* correctly formed compress option */
3392 continue;
3393 }
3394 if (debug)
3395 addlog(" [invalid]");
3396 break;
3397 #endif
3398 default:
3399 /* Others not supported. */
3400 if (debug)
3401 addlog(" [rej]");
3402 break;
3403 }
3404 /* Add the option to rejected list. */
3405 bcopy (p, r, p[1]);
3406 r += p[1];
3407 rlen += p[1];
3408 }
3409 if (rlen) {
3410 if (debug)
3411 addlog(" send conf-rej\n");
3412 sppp_cp_send(sp, PPP_IPV6CP, CONF_REJ, h->ident, rlen, buf);
3413 goto end;
3414 } else if (debug)
3415 addlog("\n");
3416
3417 /* pass 2: parse option values */
3418 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
3419 if (debug)
3420 log(LOG_DEBUG, "%s: ipv6cp parse opt values: ",
3421 ifp->if_xname);
3422 p = (void *)(h + 1);
3423 len = origlen;
3424 type = CONF_ACK;
3425 for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
3426 if (debug)
3427 addlog(" %s", sppp_ipv6cp_opt_name(*p));
3428 switch (*p) {
3429 #ifdef notyet
3430 case IPV6CP_OPT_COMPRESSION:
3431 continue;
3432 #endif
3433 case IPV6CP_OPT_IFID:
3434 memset(&desiredaddr, 0, sizeof(desiredaddr));
3435 memcpy(&desiredaddr.s6_addr[8], &p[2], 8);
3436 collision = (memcmp(&desiredaddr.s6_addr[8],
3437 &myaddr.s6_addr[8], 8) == 0);
3438 nohisaddr = IN6_IS_ADDR_UNSPECIFIED(&desiredaddr);
3439
3440 desiredaddr.s6_addr16[0] = htons(0xfe80);
3441 (void)in6_setscope(&desiredaddr, &sp->pp_if, NULL);
3442
3443 if (!collision && !nohisaddr) {
3444 /* no collision, hisaddr known - Conf-Ack */
3445 type = CONF_ACK;
3446
3447 if (debug) {
3448 addlog(" %s [%s]",
3449 ip6_sprintf(&desiredaddr),
3450 sppp_cp_type_name(type));
3451 }
3452 continue;
3453 }
3454
3455 memset(&suggestaddr, 0, sizeof(suggestaddr));
3456 if (collision && nohisaddr) {
3457 /* collision, hisaddr unknown - Conf-Rej */
3458 type = CONF_REJ;
3459 memset(&p[2], 0, 8);
3460 } else {
3461 /*
3462 * - no collision, hisaddr unknown, or
3463 * - collision, hisaddr known
3464 * Conf-Nak, suggest hisaddr
3465 */
3466 type = CONF_NAK;
3467 sppp_suggest_ip6_addr(sp, &suggestaddr);
3468 memcpy(&p[2], &suggestaddr.s6_addr[8], 8);
3469 }
3470 if (debug)
3471 addlog(" %s [%s]", ip6_sprintf(&desiredaddr),
3472 sppp_cp_type_name(type));
3473 break;
3474 }
3475 /* Add the option to nak'ed list. */
3476 bcopy (p, r, p[1]);
3477 r += p[1];
3478 rlen += p[1];
3479 }
3480
3481 if (rlen == 0 && type == CONF_ACK) {
3482 if (debug)
3483 addlog(" send %s\n", sppp_cp_type_name(type));
3484 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, origlen, h + 1);
3485 } else {
3486 #ifdef notdef
3487 if (type == CONF_ACK)
3488 panic("IPv6CP RCR: CONF_ACK with non-zero rlen");
3489 #endif
3490
3491 if (debug) {
3492 addlog(" send %s suggest %s\n",
3493 sppp_cp_type_name(type), ip6_sprintf(&suggestaddr));
3494 }
3495 sppp_cp_send(sp, PPP_IPV6CP, type, h->ident, rlen, buf);
3496 }
3497
3498 end:
3499 free(buf, M_TEMP);
3500 return (rlen == 0);
3501
3502 drop:
3503 free(buf, M_TEMP);
3504 return -1;
3505 }
3506
3507 /*
3508 * Analyze the IPv6CP Configure-Reject option list, and adjust our
3509 * negotiation.
3510 */
3511 static void
3512 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h, int len)
3513 {
3514 u_char *buf, *p;
3515 struct ifnet *ifp = &sp->pp_if;
3516 int debug = ifp->if_flags & IFF_DEBUG;
3517
3518 len -= 4;
3519 buf = malloc (len, M_TEMP, M_NOWAIT);
3520 if (!buf)
3521 return;
3522
3523 if (debug)
3524 log(LOG_DEBUG, "%s: ipv6cp rej opts:",
3525 ifp->if_xname);
3526
3527 p = (void *)(h + 1);
3528 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3529 if (p[1] > len) {
3530 /* XXX just RXJ? */
3531 addlog("%s: received malicious IPCPv6 option, "
3532 "dropping\n", ifp->if_xname);
3533 goto drop;
3534 }
3535 if (debug)
3536 addlog(" %s", sppp_ipv6cp_opt_name(*p));
3537 switch (*p) {
3538 case IPV6CP_OPT_IFID:
3539 /*
3540 * Peer doesn't grok address option. This is
3541 * bad. XXX Should we better give up here?
3542 */
3543 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_IFID);
3544 break;
3545 #ifdef notyet
3546 case IPV6CP_OPT_COMPRESS:
3547 sp->ipv6cp.opts &= ~(1 << IPV6CP_OPT_COMPRESS);
3548 break;
3549 #endif
3550 }
3551 }
3552 if (debug)
3553 addlog("\n");
3554 drop:
3555 free(buf, M_TEMP);
3556 return;
3557 }
3558
3559 /*
3560 * Analyze the IPv6CP Configure-NAK option list, and adjust our
3561 * negotiation.
3562 */
3563 static void
3564 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h, int len)
3565 {
3566 u_char *buf, *p;
3567 struct ifnet *ifp = &sp->pp_if;
3568 int debug = ifp->if_flags & IFF_DEBUG;
3569 struct in6_addr suggestaddr;
3570
3571 len -= 4;
3572 buf = malloc (len, M_TEMP, M_NOWAIT);
3573 if (!buf)
3574 return;
3575
3576 if (debug)
3577 log(LOG_DEBUG, "%s: ipv6cp nak opts:",
3578 ifp->if_xname);
3579
3580 p = (void *)(h + 1);
3581 for (; len > 1 && p[1]; len -= p[1], p += p[1]) {
3582 if (p[1] > len) {
3583 /* XXX just RXJ? */
3584 addlog("%s: received malicious IPCPv6 option, "
3585 "dropping\n", ifp->if_xname);
3586 goto drop;
3587 }
3588 if (debug)
3589 addlog(" %s", sppp_ipv6cp_opt_name(*p));
3590 switch (*p) {
3591 case IPV6CP_OPT_IFID:
3592 /*
3593 * Peer doesn't like our local ifid. See
3594 * if we can do something for him. We'll drop
3595 * him our address then.
3596 */
3597 if (len < 10 || p[1] != 10)
3598 break;
3599 memset(&suggestaddr, 0, sizeof(suggestaddr));
3600 suggestaddr.s6_addr16[0] = htons(0xfe80);
3601 (void)in6_setscope(&suggestaddr, &sp->pp_if, NULL);
3602 memcpy(&suggestaddr.s6_addr[8], &p[2], 8);
3603
3604 sp->ipv6cp.opts |= (1 << IPV6CP_OPT_IFID);
3605 if (debug)
3606 addlog(" [suggestaddr %s]",
3607 ip6_sprintf(&suggestaddr));
3608 #ifdef IPV6CP_MYIFID_DYN
3609 /*
3610 * When doing dynamic address assignment,
3611 * we accept his offer.
3612 */
3613 if (sp->ipv6cp.flags & IPV6CP_MYIFID_DYN) {
3614 struct in6_addr lastsuggest;
3615 /*
3616 * If <suggested myaddr from peer> equals to
3617 * <hisaddr we have suggested last time>,
3618 * we have a collision. generate new random
3619 * ifid.
3620 */
3621 sppp_suggest_ip6_addr(&lastsuggest);
3622 if (IN6_ARE_ADDR_EQUAL(&suggestaddr,
3623 lastsuggest)) {
3624 if (debug)
3625 addlog(" [random]");
3626 sppp_gen_ip6_addr(sp, &suggestaddr);
3627 }
3628 sppp_set_ip6_addr(sp, &suggestaddr, 0);
3629 if (debug)
3630 addlog(" [agree]");
3631 sp->ipv6cp.flags |= IPV6CP_MYIFID_SEEN;
3632 }
3633 #else
3634 /*
3635 * Since we do not do dynamic address assignment,
3636 * we ignore it and thus continue to negotiate
3637 * our already existing value. This can possibly
3638 * go into infinite request-reject loop.
3639 *
3640 * This is not likely because we normally use
3641 * ifid based on MAC-address.
3642 * If you have no ethernet card on the node, too bad.
3643 * XXX should we use fail_counter?
3644 */
3645 #endif
3646 break;
3647 #ifdef notyet
3648 case IPV6CP_OPT_COMPRESS:
3649 /*
3650 * Peer wants different compression parameters.
3651 */
3652 break;
3653 #endif
3654 }
3655 }
3656 if (debug)
3657 addlog("\n");
3658 drop:
3659 free(buf, M_TEMP);
3660 return;
3661 }
3662
3663 static void
3664 sppp_ipv6cp_tlu(struct sppp *sp)
3665 {
3666 /* we are up - notify isdn daemon */
3667 if (sp->pp_con)
3668 sp->pp_con(sp);
3669 }
3670
3671 static void
3672 sppp_ipv6cp_tld(struct sppp *sp)
3673 {
3674 }
3675
3676 static void
3677 sppp_ipv6cp_tls(struct sppp *sp)
3678 {
3679 /* indicate to LCP that it must stay alive */
3680 sp->lcp.protos |= (1 << IDX_IPV6CP);
3681 }
3682
3683 static void
3684 sppp_ipv6cp_tlf(struct sppp *sp)
3685 {
3686 /* we no longer need LCP */
3687 sp->lcp.protos &= ~(1 << IDX_IPV6CP);
3688 }
3689
3690 static void
3691 sppp_ipv6cp_scr(struct sppp *sp)
3692 {
3693 char opt[10 /* ifid */ + 4 /* compression, minimum */];
3694 struct in6_addr ouraddr;
3695 int i = 0;
3696
3697 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_IFID)) {
3698 sppp_get_ip6_addrs(sp, &ouraddr, 0, 0);
3699 opt[i++] = IPV6CP_OPT_IFID;
3700 opt[i++] = 10;
3701 memcpy(&opt[i], &ouraddr.s6_addr[8], 8);
3702 i += 8;
3703 }
3704
3705 #ifdef notyet
3706 if (sp->ipv6cp.opts & (1 << IPV6CP_OPT_COMPRESSION)) {
3707 opt[i++] = IPV6CP_OPT_COMPRESSION;
3708 opt[i++] = 4;
3709 opt[i++] = 0; /* TBD */
3710 opt[i++] = 0; /* TBD */
3711 /* variable length data may follow */
3712 }
3713 #endif
3714
3715 sp->confid[IDX_IPV6CP] = ++sp->pp_seq[IDX_IPV6CP];
3716 sppp_cp_send(sp, PPP_IPV6CP, CONF_REQ, sp->confid[IDX_IPV6CP], i, &opt);
3717 }
3718 #else /*INET6*/
3719 static void
3720 sppp_ipv6cp_init(struct sppp *sp)
3721 {
3722 }
3723
3724 static void
3725 sppp_ipv6cp_up(struct sppp *sp)
3726 {
3727 }
3728
3729 static void
3730 sppp_ipv6cp_down(struct sppp *sp)
3731 {
3732 }
3733
3734 static void
3735 sppp_ipv6cp_open(struct sppp *sp)
3736 {
3737 }
3738
3739 static void
3740 sppp_ipv6cp_close(struct sppp *sp)
3741 {
3742 }
3743
3744 static void
3745 sppp_ipv6cp_TO(void *sp)
3746 {
3747 }
3748
3749 static int
3750 sppp_ipv6cp_RCR(struct sppp *sp, struct lcp_header *h,
3751 int len)
3752 {
3753 return 0;
3754 }
3755
3756 static void
3757 sppp_ipv6cp_RCN_rej(struct sppp *sp, struct lcp_header *h,
3758 int len)
3759 {
3760 }
3761
3762 static void
3763 sppp_ipv6cp_RCN_nak(struct sppp *sp, struct lcp_header *h,
3764 int len)
3765 {
3766 }
3767
3768 static void
3769 sppp_ipv6cp_tlu(struct sppp *sp)
3770 {
3771 }
3772
3773 static void
3774 sppp_ipv6cp_tld(struct sppp *sp)
3775 {
3776 }
3777
3778 static void
3779 sppp_ipv6cp_tls(struct sppp *sp)
3780 {
3781 }
3782
3783 static void
3784 sppp_ipv6cp_tlf(struct sppp *sp)
3785 {
3786 }
3787
3788 static void
3789 sppp_ipv6cp_scr(struct sppp *sp)
3790 {
3791 }
3792 #endif /*INET6*/
3793
3794
3795 /*
3796 *--------------------------------------------------------------------------*
3797 * *
3798 * The CHAP implementation. *
3799 * *
3800 *--------------------------------------------------------------------------*
3801 */
3802
3803 /*
3804 * The authentication protocols don't employ a full-fledged state machine as
3805 * the control protocols do, since they do have Open and Close events, but
3806 * not Up and Down, nor are they explicitly terminated. Also, use of the
3807 * authentication protocols may be different in both directions (this makes
3808 * sense, think of a machine that never accepts incoming calls but only
3809 * calls out, it doesn't require the called party to authenticate itself).
3810 *
3811 * Our state machine for the local authentication protocol (we are requesting
3812 * the peer to authenticate) looks like:
3813 *
3814 * RCA-
3815 * +--------------------------------------------+
3816 * V scn,tld|
3817 * +--------+ Close +---------+ RCA+
3818 * | |<----------------------------------| |------+
3819 * +--->| Closed | TO* | Opened | sca |
3820 * | | |-----+ +-------| |<-----+
3821 * | +--------+ irc | | +---------+
3822 * | ^ | | ^
3823 * | | | | |
3824 * | | | | |
3825 * | TO-| | | |
3826 * | |tld TO+ V | |
3827 * | | +------->+ | |
3828 * | | | | | |
3829 * | +--------+ V | |
3830 * | | |<----+<--------------------+ |
3831 * | | Req- | scr |
3832 * | | Sent | |
3833 * | | | |
3834 * | +--------+ |
3835 * | RCA- | | RCA+ |
3836 * +------+ +------------------------------------------+
3837 * scn,tld sca,irc,ict,tlu
3838 *
3839 *
3840 * with:
3841 *
3842 * Open: LCP reached authentication phase
3843 * Close: LCP reached terminate phase
3844 *
3845 * RCA+: received reply (pap-req, chap-response), acceptable
3846 * RCN: received reply (pap-req, chap-response), not acceptable
3847 * TO+: timeout with restart counter >= 0
3848 * TO-: timeout with restart counter < 0
3849 * TO*: reschedule timeout for CHAP
3850 *
3851 * scr: send request packet (none for PAP, chap-challenge)
3852 * sca: send ack packet (pap-ack, chap-success)
3853 * scn: send nak packet (pap-nak, chap-failure)
3854 * ict: initialize re-challenge timer (CHAP only)
3855 *
3856 * tlu: this-layer-up, LCP reaches network phase
3857 * tld: this-layer-down, LCP enters terminate phase
3858 *
3859 * Note that in CHAP mode, after sending a new challenge, while the state
3860 * automaton falls back into Req-Sent state, it doesn't signal a tld
3861 * event to LCP, so LCP remains in network phase. Only after not getting
3862 * any response (or after getting an unacceptable response), CHAP closes,
3863 * causing LCP to enter terminate phase.
3864 *
3865 * With PAP, there is no initial request that can be sent. The peer is
3866 * expected to send one based on the successful negotiation of PAP as
3867 * the authentication protocol during the LCP option negotiation.
3868 *
3869 * Incoming authentication protocol requests (remote requests
3870 * authentication, we are peer) don't employ a state machine at all,
3871 * they are simply answered. Some peers [Ascend P50 firmware rev
3872 * 4.50] react allergically when sending IPCP/IPv6CP requests while they are
3873 * still in authentication phase (thereby violating the standard that
3874 * demands that these NCP packets are to be discarded), so we keep
3875 * track of the peer demanding us to authenticate, and only proceed to
3876 * phase network once we've seen a positive acknowledge for the
3877 * authentication.
3878 */
3879
3880 /*
3881 * Handle incoming CHAP packets.
3882 */
3883 void
3884 sppp_chap_input(struct sppp *sp, struct mbuf *m)
3885 {
3886 STDDCL;
3887 struct lcp_header *h;
3888 int len, x;
3889 u_char *value, *name, digest[sizeof(sp->myauth.challenge)], dsize;
3890 int value_len, name_len;
3891 MD5_CTX ctx;
3892
3893 len = m->m_pkthdr.len;
3894 if (len < 4) {
3895 if (debug)
3896 log(LOG_DEBUG,
3897 "%s: chap invalid packet length: %d bytes\n",
3898 ifp->if_xname, len);
3899 return;
3900 }
3901 h = mtod(m, struct lcp_header *);
3902 if (len > ntohs(h->len))
3903 len = ntohs(h->len);
3904
3905 switch (h->type) {
3906 /* challenge, failure and success are his authproto */
3907 case CHAP_CHALLENGE:
3908 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) {
3909 /* can't do anything usefull */
3910 sp->pp_auth_failures++;
3911 printf("%s: chap input without my name and my secret being set\n",
3912 ifp->if_xname);
3913 break;
3914 }
3915 value = 1 + (u_char *)(h + 1);
3916 value_len = value[-1];
3917 name = value + value_len;
3918 name_len = len - value_len - 5;
3919 if (name_len < 0) {
3920 if (debug) {
3921 log(LOG_DEBUG,
3922 "%s: chap corrupted challenge "
3923 "<%s id=0x%x len=%d",
3924 ifp->if_xname,
3925 sppp_auth_type_name(PPP_CHAP, h->type),
3926 h->ident, ntohs(h->len));
3927 if (len > 4)
3928 sppp_print_bytes((u_char *)(h + 1),
3929 len - 4);
3930 addlog(">\n");
3931 }
3932 break;
3933 }
3934
3935 if (debug) {
3936 log(LOG_DEBUG,
3937 "%s: chap input <%s id=0x%x len=%d name=",
3938 ifp->if_xname,
3939 sppp_auth_type_name(PPP_CHAP, h->type), h->ident,
3940 ntohs(h->len));
3941 sppp_print_string((char *) name, name_len);
3942 addlog(" value-size=%d value=", value_len);
3943 sppp_print_bytes(value, value_len);
3944 addlog(">\n");
3945 }
3946
3947 /* Compute reply value. */
3948 MD5Init(&ctx);
3949 MD5Update(&ctx, &h->ident, 1);
3950 MD5Update(&ctx, sp->myauth.secret, sp->myauth.secret_len);
3951 MD5Update(&ctx, value, value_len);
3952 MD5Final(digest, &ctx);
3953 dsize = sizeof digest;
3954
3955 sppp_auth_send(&chap, sp, CHAP_RESPONSE, h->ident,
3956 sizeof dsize, (const char *)&dsize,
3957 sizeof digest, digest,
3958 sp->myauth.name_len,
3959 sp->myauth.name,
3960 0);
3961 break;
3962
3963 case CHAP_SUCCESS:
3964 if (debug) {
3965 log(LOG_DEBUG, "%s: chap success",
3966 ifp->if_xname);
3967 if (len > 4) {
3968 addlog(": ");
3969 sppp_print_string((char *)(h + 1), len - 4);
3970 }
3971 addlog("\n");
3972 }
3973 x = splnet();
3974 sp->pp_auth_failures = 0;
3975 sp->pp_flags &= ~PP_NEEDAUTH;
3976 if (sp->myauth.proto == PPP_CHAP &&
3977 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
3978 (sp->lcp.protos & (1 << IDX_CHAP)) == 0) {
3979 /*
3980 * We are authenticator for CHAP but didn't
3981 * complete yet. Leave it to tlu to proceed
3982 * to network phase.
3983 */
3984 splx(x);
3985 break;
3986 }
3987 splx(x);
3988 sppp_phase_network(sp);
3989 break;
3990
3991 case CHAP_FAILURE:
3992 x = splnet();
3993 sp->pp_auth_failures++;
3994 splx(x);
3995 if (debug) {
3996 log(LOG_INFO, "%s: chap failure",
3997 ifp->if_xname);
3998 if (len > 4) {
3999 addlog(": ");
4000 sppp_print_string((char *)(h + 1), len - 4);
4001 }
4002 addlog("\n");
4003 } else
4004 log(LOG_INFO, "%s: chap failure\n",
4005 ifp->if_xname);
4006 /* await LCP shutdown by authenticator */
4007 break;
4008
4009 /* response is my authproto */
4010 case CHAP_RESPONSE:
4011 if (sp->hisauth.secret == NULL) {
4012 /* can't do anything usefull */
4013 printf("%s: chap input without his secret being set\n",
4014 ifp->if_xname);
4015 break;
4016 }
4017 value = 1 + (u_char *)(h + 1);
4018 value_len = value[-1];
4019 name = value + value_len;
4020 name_len = len - value_len - 5;
4021 if (name_len < 0) {
4022 if (debug) {
4023 log(LOG_DEBUG,
4024 "%s: chap corrupted response "
4025 "<%s id=0x%x len=%d",
4026 ifp->if_xname,
4027 sppp_auth_type_name(PPP_CHAP, h->type),
4028 h->ident, ntohs(h->len));
4029 if (len > 4)
4030 sppp_print_bytes((u_char *)(h + 1),
4031 len - 4);
4032 addlog(">\n");
4033 }
4034 break;
4035 }
4036 if (h->ident != sp->confid[IDX_CHAP]) {
4037 if (debug)
4038 log(LOG_DEBUG,
4039 "%s: chap dropping response for old ID "
4040 "(got %d, expected %d)\n",
4041 ifp->if_xname,
4042 h->ident, sp->confid[IDX_CHAP]);
4043 break;
4044 }
4045 if (sp->hisauth.name != NULL &&
4046 (name_len != sp->hisauth.name_len
4047 || memcmp(name, sp->hisauth.name, name_len) != 0)) {
4048 log(LOG_INFO, "%s: chap response, his name ",
4049 ifp->if_xname);
4050 sppp_print_string(name, name_len);
4051 addlog(" != expected ");
4052 sppp_print_string(sp->hisauth.name,
4053 sp->hisauth.name_len);
4054 addlog("\n");
4055 goto chap_failure;
4056 }
4057 if (debug) {
4058 log(LOG_DEBUG, "%s: chap input(%s) "
4059 "<%s id=0x%x len=%d name=",
4060 ifp->if_xname,
4061 sppp_state_name(sp->state[IDX_CHAP]),
4062 sppp_auth_type_name(PPP_CHAP, h->type),
4063 h->ident, ntohs(h->len));
4064 sppp_print_string((char *)name, name_len);
4065 addlog(" value-size=%d value=", value_len);
4066 sppp_print_bytes(value, value_len);
4067 addlog(">\n");
4068 }
4069 if (value_len != sizeof(sp->myauth.challenge)) {
4070 if (debug)
4071 log(LOG_DEBUG,
4072 "%s: chap bad hash value length: "
4073 "%d bytes, should be %ld\n",
4074 ifp->if_xname, value_len,
4075 (long) sizeof(sp->myauth.challenge));
4076 goto chap_failure;
4077 }
4078
4079 MD5Init(&ctx);
4080 MD5Update(&ctx, &h->ident, 1);
4081 MD5Update(&ctx, sp->hisauth.secret, sp->hisauth.secret_len);
4082 MD5Update(&ctx, sp->myauth.challenge, sizeof(sp->myauth.challenge));
4083 MD5Final(digest, &ctx);
4084
4085 #define FAILMSG "Failed..."
4086 #define SUCCMSG "Welcome!"
4087
4088 if (value_len != sizeof digest ||
4089 memcmp(digest, value, value_len) != 0) {
4090 chap_failure:
4091 /* action scn, tld */
4092 x = splnet();
4093 sp->pp_auth_failures++;
4094 splx(x);
4095 sppp_auth_send(&chap, sp, CHAP_FAILURE, h->ident,
4096 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG,
4097 0);
4098 chap.tld(sp);
4099 break;
4100 }
4101 sp->pp_auth_failures = 0;
4102 /* action sca, perhaps tlu */
4103 if (sp->state[IDX_CHAP] == STATE_REQ_SENT ||
4104 sp->state[IDX_CHAP] == STATE_OPENED)
4105 sppp_auth_send(&chap, sp, CHAP_SUCCESS, h->ident,
4106 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG,
4107 0);
4108 if (sp->state[IDX_CHAP] == STATE_REQ_SENT) {
4109 sppp_cp_change_state(&chap, sp, STATE_OPENED);
4110 chap.tlu(sp);
4111 }
4112 break;
4113
4114 default:
4115 /* Unknown CHAP packet type -- ignore. */
4116 if (debug) {
4117 log(LOG_DEBUG, "%s: chap unknown input(%s) "
4118 "<0x%x id=0x%xh len=%d",
4119 ifp->if_xname,
4120 sppp_state_name(sp->state[IDX_CHAP]),
4121 h->type, h->ident, ntohs(h->len));
4122 if (len > 4)
4123 sppp_print_bytes((u_char *)(h + 1), len - 4);
4124 addlog(">\n");
4125 }
4126 break;
4127
4128 }
4129 }
4130
4131 static void
4132 sppp_chap_init(struct sppp *sp)
4133 {
4134 /* Chap doesn't have STATE_INITIAL at all. */
4135 sp->state[IDX_CHAP] = STATE_CLOSED;
4136 sp->fail_counter[IDX_CHAP] = 0;
4137 sp->pp_seq[IDX_CHAP] = 0;
4138 sp->pp_rseq[IDX_CHAP] = 0;
4139 callout_init(&sp->ch[IDX_CHAP], 0);
4140 }
4141
4142 static void
4143 sppp_chap_open(struct sppp *sp)
4144 {
4145 if (sp->myauth.proto == PPP_CHAP &&
4146 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4147 /* we are authenticator for CHAP, start it */
4148 chap.scr(sp);
4149 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4150 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4151 }
4152 /* nothing to be done if we are peer, await a challenge */
4153 }
4154
4155 static void
4156 sppp_chap_close(struct sppp *sp)
4157 {
4158 if (sp->state[IDX_CHAP] != STATE_CLOSED)
4159 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4160 }
4161
4162 static void
4163 sppp_chap_TO(void *cookie)
4164 {
4165 struct sppp *sp = (struct sppp *)cookie;
4166 STDDCL;
4167 int s;
4168
4169 s = splnet();
4170 if (debug)
4171 log(LOG_DEBUG, "%s: chap TO(%s) rst_counter = %d\n",
4172 ifp->if_xname,
4173 sppp_state_name(sp->state[IDX_CHAP]),
4174 sp->rst_counter[IDX_CHAP]);
4175
4176 if (--sp->rst_counter[IDX_CHAP] < 0)
4177 /* TO- event */
4178 switch (sp->state[IDX_CHAP]) {
4179 case STATE_REQ_SENT:
4180 chap.tld(sp);
4181 sppp_cp_change_state(&chap, sp, STATE_CLOSED);
4182 break;
4183 }
4184 else
4185 /* TO+ (or TO*) event */
4186 switch (sp->state[IDX_CHAP]) {
4187 case STATE_OPENED:
4188 /* TO* event */
4189 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4190 /* fall through */
4191 case STATE_REQ_SENT:
4192 chap.scr(sp);
4193 /* sppp_cp_change_state() will restart the timer */
4194 sppp_cp_change_state(&chap, sp, STATE_REQ_SENT);
4195 break;
4196 }
4197
4198 splx(s);
4199 }
4200
4201 static void
4202 sppp_chap_tlu(struct sppp *sp)
4203 {
4204 STDDCL;
4205 int i, x;
4206
4207 i = 0;
4208 sp->rst_counter[IDX_CHAP] = sp->lcp.max_configure;
4209
4210 /*
4211 * Some broken CHAP implementations (Conware CoNet, firmware
4212 * 4.0.?) don't want to re-authenticate their CHAP once the
4213 * initial challenge-response exchange has taken place.
4214 * Provide for an option to avoid rechallenges.
4215 */
4216 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0) {
4217 /*
4218 * Compute the re-challenge timeout. This will yield
4219 * a number between 300 and 810 seconds.
4220 */
4221 i = 300 + ((unsigned)(arc4random() & 0xff00) >> 7);
4222
4223 callout_reset(&sp->ch[IDX_CHAP], i * hz, chap.TO, sp);
4224 }
4225
4226 if (debug) {
4227 log(LOG_DEBUG,
4228 "%s: chap %s, ",
4229 ifp->if_xname,
4230 sp->pp_phase == SPPP_PHASE_NETWORK? "reconfirmed": "tlu");
4231 if ((sp->hisauth.flags & SPPP_AUTHFLAG_NORECHALLENGE) == 0)
4232 addlog("next re-challenge in %d seconds\n", i);
4233 else
4234 addlog("re-challenging supressed\n");
4235 }
4236
4237 x = splnet();
4238 sp->pp_auth_failures = 0;
4239 /* indicate to LCP that we need to be closed down */
4240 sp->lcp.protos |= (1 << IDX_CHAP);
4241
4242 if (sp->pp_flags & PP_NEEDAUTH) {
4243 /*
4244 * Remote is authenticator, but his auth proto didn't
4245 * complete yet. Defer the transition to network
4246 * phase.
4247 */
4248 splx(x);
4249 return;
4250 }
4251 splx(x);
4252
4253 /*
4254 * If we are already in phase network, we are done here. This
4255 * is the case if this is a dummy tlu event after a re-challenge.
4256 */
4257 if (sp->pp_phase != SPPP_PHASE_NETWORK)
4258 sppp_phase_network(sp);
4259 }
4260
4261 static void
4262 sppp_chap_tld(struct sppp *sp)
4263 {
4264 STDDCL;
4265
4266 if (debug)
4267 log(LOG_DEBUG, "%s: chap tld\n", ifp->if_xname);
4268 callout_stop(&sp->ch[IDX_CHAP]);
4269 sp->lcp.protos &= ~(1 << IDX_CHAP);
4270
4271 lcp.Close(sp);
4272 }
4273
4274 static void
4275 sppp_chap_scr(struct sppp *sp)
4276 {
4277 uint32_t *ch;
4278 u_char clen;
4279
4280 if (sp->myauth.name == NULL) {
4281 /* can't do anything usefull */
4282 printf("%s: chap starting without my name being set\n",
4283 sp->pp_if.if_xname);
4284 return;
4285 }
4286
4287 /* Compute random challenge. */
4288 ch = (uint32_t *)sp->myauth.challenge;
4289 ch[0] = arc4random();
4290 ch[1] = arc4random();
4291 ch[2] = arc4random();
4292 ch[3] = arc4random();
4293 clen = 16; /* 4 * sizeof(uint32_t) */
4294
4295 sp->confid[IDX_CHAP] = ++sp->pp_seq[IDX_CHAP];
4296
4297 sppp_auth_send(&chap, sp, CHAP_CHALLENGE, sp->confid[IDX_CHAP],
4298 sizeof clen, (const char *)&clen,
4299 sizeof(sp->myauth.challenge), sp->myauth.challenge,
4300 sp->myauth.name_len,
4301 sp->myauth.name,
4302 0);
4303 }
4304
4305 /*
4306 *--------------------------------------------------------------------------*
4307 * *
4308 * The PAP implementation. *
4309 * *
4310 *--------------------------------------------------------------------------*
4311 */
4312 /*
4313 * For PAP, we need to keep a little state also if we are the peer, not the
4314 * authenticator. This is since we don't get a request to authenticate, but
4315 * have to repeatedly authenticate ourself until we got a response (or the
4316 * retry counter is expired).
4317 */
4318
4319 /*
4320 * Handle incoming PAP packets. */
4321 static void
4322 sppp_pap_input(struct sppp *sp, struct mbuf *m)
4323 {
4324 STDDCL;
4325 struct lcp_header *h;
4326 int len, x;
4327 u_char mlen;
4328 char *name, *secret;
4329 int name_len, secret_len;
4330
4331 /*
4332 * Malicious input might leave this uninitialized, so
4333 * init to an impossible value.
4334 */
4335 secret_len = -1;
4336
4337 len = m->m_pkthdr.len;
4338 if (len < 5) {
4339 if (debug)
4340 log(LOG_DEBUG,
4341 "%s: pap invalid packet length: %d bytes\n",
4342 ifp->if_xname, len);
4343 return;
4344 }
4345 h = mtod(m, struct lcp_header *);
4346 if (len > ntohs(h->len))
4347 len = ntohs(h->len);
4348 switch (h->type) {
4349 /* PAP request is my authproto */
4350 case PAP_REQ:
4351 if (sp->hisauth.name == NULL || sp->hisauth.secret == NULL) {
4352 /* can't do anything usefull */
4353 printf("%s: pap request without his name and his secret being set\n",
4354 ifp->if_xname);
4355 break;
4356 }
4357 name = 1 + (u_char *)(h + 1);
4358 name_len = name[-1];
4359 secret = name + name_len + 1;
4360 if (name_len > len - 6 ||
4361 (secret_len = secret[-1]) > len - 6 - name_len) {
4362 if (debug) {
4363 log(LOG_DEBUG, "%s: pap corrupted input "
4364 "<%s id=0x%x len=%d",
4365 ifp->if_xname,
4366 sppp_auth_type_name(PPP_PAP, h->type),
4367 h->ident, ntohs(h->len));
4368 if (len > 4)
4369 sppp_print_bytes((u_char *)(h + 1),
4370 len - 4);
4371 addlog(">\n");
4372 }
4373 break;
4374 }
4375 if (debug) {
4376 log(LOG_DEBUG, "%s: pap input(%s) "
4377 "<%s id=0x%x len=%d name=",
4378 ifp->if_xname,
4379 sppp_state_name(sp->state[IDX_PAP]),
4380 sppp_auth_type_name(PPP_PAP, h->type),
4381 h->ident, ntohs(h->len));
4382 sppp_print_string((char *)name, name_len);
4383 addlog(" secret=");
4384 sppp_print_string((char *)secret, secret_len);
4385 addlog(">\n");
4386 }
4387 if (name_len != sp->hisauth.name_len ||
4388 secret_len != sp->hisauth.secret_len ||
4389 memcmp(name, sp->hisauth.name, name_len) != 0 ||
4390 memcmp(secret, sp->hisauth.secret, secret_len) != 0) {
4391 /* action scn, tld */
4392 sp->pp_auth_failures++;
4393 mlen = sizeof(FAILMSG) - 1;
4394 sppp_auth_send(&pap, sp, PAP_NAK, h->ident,
4395 sizeof mlen, (const char *)&mlen,
4396 sizeof(FAILMSG) - 1, (const u_char *)FAILMSG,
4397 0);
4398 pap.tld(sp);
4399 break;
4400 }
4401 /* action sca, perhaps tlu */
4402 if (sp->state[IDX_PAP] == STATE_REQ_SENT ||
4403 sp->state[IDX_PAP] == STATE_OPENED) {
4404 mlen = sizeof(SUCCMSG) - 1;
4405 sppp_auth_send(&pap, sp, PAP_ACK, h->ident,
4406 sizeof mlen, (const char *)&mlen,
4407 sizeof(SUCCMSG) - 1, (const u_char *)SUCCMSG,
4408 0);
4409 }
4410 if (sp->state[IDX_PAP] == STATE_REQ_SENT) {
4411 sppp_cp_change_state(&pap, sp, STATE_OPENED);
4412 pap.tlu(sp);
4413 }
4414 break;
4415
4416 /* ack and nak are his authproto */
4417 case PAP_ACK:
4418 callout_stop(&sp->pap_my_to_ch);
4419 if (debug) {
4420 log(LOG_DEBUG, "%s: pap success",
4421 ifp->if_xname);
4422 name = 1 + (u_char *)(h + 1);
4423 name_len = name[-1];
4424 if (len > 5 && name_len < len+4) {
4425 addlog(": ");
4426 sppp_print_string(name, name_len);
4427 }
4428 addlog("\n");
4429 }
4430 x = splnet();
4431 sp->pp_auth_failures = 0;
4432 sp->pp_flags &= ~PP_NEEDAUTH;
4433 if (sp->myauth.proto == PPP_PAP &&
4434 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) &&
4435 (sp->lcp.protos & (1 << IDX_PAP)) == 0) {
4436 /*
4437 * We are authenticator for PAP but didn't
4438 * complete yet. Leave it to tlu to proceed
4439 * to network phase.
4440 */
4441 splx(x);
4442 break;
4443 }
4444 splx(x);
4445 sppp_phase_network(sp);
4446 break;
4447
4448 case PAP_NAK:
4449 callout_stop(&sp->pap_my_to_ch);
4450 sp->pp_auth_failures++;
4451 if (debug) {
4452 log(LOG_INFO, "%s: pap failure",
4453 ifp->if_xname);
4454 name = 1 + (u_char *)(h + 1);
4455 name_len = name[-1];
4456 if (len > 5 && name_len < len+4) {
4457 addlog(": ");
4458 sppp_print_string(name, name_len);
4459 }
4460 addlog("\n");
4461 } else
4462 log(LOG_INFO, "%s: pap failure\n",
4463 ifp->if_xname);
4464 /* await LCP shutdown by authenticator */
4465 break;
4466
4467 default:
4468 /* Unknown PAP packet type -- ignore. */
4469 if (debug) {
4470 log(LOG_DEBUG, "%s: pap corrupted input "
4471 "<0x%x id=0x%x len=%d",
4472 ifp->if_xname,
4473 h->type, h->ident, ntohs(h->len));
4474 if (len > 4)
4475 sppp_print_bytes((u_char *)(h + 1), len - 4);
4476 addlog(">\n");
4477 }
4478 break;
4479
4480 }
4481 }
4482
4483 static void
4484 sppp_pap_init(struct sppp *sp)
4485 {
4486 /* PAP doesn't have STATE_INITIAL at all. */
4487 sp->state[IDX_PAP] = STATE_CLOSED;
4488 sp->fail_counter[IDX_PAP] = 0;
4489 sp->pp_seq[IDX_PAP] = 0;
4490 sp->pp_rseq[IDX_PAP] = 0;
4491 callout_init(&sp->ch[IDX_PAP], 0);
4492 callout_init(&sp->pap_my_to_ch, 0);
4493 }
4494
4495 static void
4496 sppp_pap_open(struct sppp *sp)
4497 {
4498 if (sp->hisauth.proto == PPP_PAP &&
4499 (sp->lcp.opts & (1 << LCP_OPT_AUTH_PROTO)) != 0) {
4500 /* we are authenticator for PAP, start our timer */
4501 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4502 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4503 }
4504 if (sp->myauth.proto == PPP_PAP) {
4505 /* we are peer, send a request, and start a timer */
4506 pap.scr(sp);
4507 callout_reset(&sp->pap_my_to_ch, sp->lcp.timeout,
4508 sppp_pap_my_TO, sp);
4509 }
4510 }
4511
4512 static void
4513 sppp_pap_close(struct sppp *sp)
4514 {
4515 if (sp->state[IDX_PAP] != STATE_CLOSED)
4516 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4517 }
4518
4519 /*
4520 * That's the timeout routine if we are authenticator. Since the
4521 * authenticator is basically passive in PAP, we can't do much here.
4522 */
4523 static void
4524 sppp_pap_TO(void *cookie)
4525 {
4526 struct sppp *sp = (struct sppp *)cookie;
4527 STDDCL;
4528 int s;
4529
4530 s = splnet();
4531 if (debug)
4532 log(LOG_DEBUG, "%s: pap TO(%s) rst_counter = %d\n",
4533 ifp->if_xname,
4534 sppp_state_name(sp->state[IDX_PAP]),
4535 sp->rst_counter[IDX_PAP]);
4536
4537 if (--sp->rst_counter[IDX_PAP] < 0)
4538 /* TO- event */
4539 switch (sp->state[IDX_PAP]) {
4540 case STATE_REQ_SENT:
4541 pap.tld(sp);
4542 sppp_cp_change_state(&pap, sp, STATE_CLOSED);
4543 break;
4544 }
4545 else
4546 /* TO+ event, not very much we could do */
4547 switch (sp->state[IDX_PAP]) {
4548 case STATE_REQ_SENT:
4549 /* sppp_cp_change_state() will restart the timer */
4550 sppp_cp_change_state(&pap, sp, STATE_REQ_SENT);
4551 break;
4552 }
4553
4554 splx(s);
4555 }
4556
4557 /*
4558 * That's the timeout handler if we are peer. Since the peer is active,
4559 * we need to retransmit our PAP request since it is apparently lost.
4560 * XXX We should impose a max counter.
4561 */
4562 static void
4563 sppp_pap_my_TO(void *cookie)
4564 {
4565 struct sppp *sp = (struct sppp *)cookie;
4566 STDDCL;
4567
4568 if (debug)
4569 log(LOG_DEBUG, "%s: pap peer TO\n",
4570 ifp->if_xname);
4571
4572 pap.scr(sp);
4573 }
4574
4575 static void
4576 sppp_pap_tlu(struct sppp *sp)
4577 {
4578 STDDCL;
4579 int x;
4580
4581 sp->rst_counter[IDX_PAP] = sp->lcp.max_configure;
4582
4583 if (debug)
4584 log(LOG_DEBUG, "%s: %s tlu\n",
4585 ifp->if_xname, pap.name);
4586
4587 x = splnet();
4588 sp->pp_auth_failures = 0;
4589 /* indicate to LCP that we need to be closed down */
4590 sp->lcp.protos |= (1 << IDX_PAP);
4591
4592 if (sp->pp_flags & PP_NEEDAUTH) {
4593 /*
4594 * Remote is authenticator, but his auth proto didn't
4595 * complete yet. Defer the transition to network
4596 * phase.
4597 */
4598 splx(x);
4599 return;
4600 }
4601 splx(x);
4602 sppp_phase_network(sp);
4603 }
4604
4605 static void
4606 sppp_pap_tld(struct sppp *sp)
4607 {
4608 STDDCL;
4609
4610 if (debug)
4611 log(LOG_DEBUG, "%s: pap tld\n", ifp->if_xname);
4612 callout_stop(&sp->ch[IDX_PAP]);
4613 callout_stop(&sp->pap_my_to_ch);
4614 sp->lcp.protos &= ~(1 << IDX_PAP);
4615
4616 lcp.Close(sp);
4617 }
4618
4619 static void
4620 sppp_pap_scr(struct sppp *sp)
4621 {
4622 u_char idlen, pwdlen;
4623
4624 if (sp->myauth.secret == NULL || sp->myauth.name == NULL) {
4625 /* can't do anything usefull */
4626 printf("%s: pap starting without my name and secret being set\n",
4627 sp->pp_if.if_xname);
4628 return;
4629 }
4630
4631 sp->confid[IDX_PAP] = ++sp->pp_seq[IDX_PAP];
4632 pwdlen = sp->myauth.secret_len;
4633 idlen = sp->myauth.name_len;
4634
4635 sppp_auth_send(&pap, sp, PAP_REQ, sp->confid[IDX_PAP],
4636 sizeof idlen, (const char *)&idlen,
4637 idlen, sp->myauth.name,
4638 sizeof pwdlen, (const char *)&pwdlen,
4639 pwdlen, sp->myauth.secret,
4640 0);
4641 }
4642
4643 /*
4644 * Random miscellaneous functions.
4645 */
4646
4647 /*
4648 * Send a PAP or CHAP proto packet.
4649 *
4650 * Varadic function, each of the elements for the ellipsis is of type
4651 * ``size_t mlen, const u_char *msg''. Processing will stop iff
4652 * mlen == 0.
4653 * NOTE: never declare variadic functions with types subject to type
4654 * promotion (i.e. u_char). This is asking for big trouble depending
4655 * on the architecture you are on...
4656 */
4657
4658 static void
4659 sppp_auth_send(const struct cp *cp, struct sppp *sp,
4660 unsigned int type, unsigned int id,
4661 ...)
4662 {
4663 STDDCL;
4664 struct lcp_header *lh;
4665 struct mbuf *m;
4666 u_char *p;
4667 int len;
4668 size_t pkthdrlen;
4669 unsigned int mlen;
4670 const char *msg;
4671 va_list ap;
4672
4673 MGETHDR(m, M_DONTWAIT, MT_DATA);
4674 if (! m)
4675 return;
4676 m->m_pkthdr.rcvif = 0;
4677
4678 if (sp->pp_flags & PP_NOFRAMING) {
4679 *mtod(m, uint16_t *) = htons(cp->proto);
4680 pkthdrlen = 2;
4681 lh = (struct lcp_header *)(mtod(m, uint8_t *)+2);
4682 } else {
4683 struct ppp_header *h;
4684 h = mtod(m, struct ppp_header *);
4685 h->address = PPP_ALLSTATIONS; /* broadcast address */
4686 h->control = PPP_UI; /* Unnumbered Info */
4687 h->protocol = htons(cp->proto);
4688 pkthdrlen = PPP_HEADER_LEN;
4689
4690 lh = (struct lcp_header *)(h + 1);
4691 }
4692
4693 lh->type = type;
4694 lh->ident = id;
4695 p = (u_char *)(lh + 1);
4696
4697 va_start(ap, id);
4698 len = 0;
4699
4700 while ((mlen = (unsigned int)va_arg(ap, size_t)) != 0) {
4701 msg = va_arg(ap, const char *);
4702 len += mlen;
4703 if (len > MHLEN - pkthdrlen - LCP_HEADER_LEN) {
4704 va_end(ap);
4705 m_freem(m);
4706 return;
4707 }
4708
4709 memcpy(p, msg, mlen);
4710 p += mlen;
4711 }
4712 va_end(ap);
4713
4714 m->m_pkthdr.len = m->m_len = pkthdrlen + LCP_HEADER_LEN + len;
4715 lh->len = htons(LCP_HEADER_LEN + len);
4716
4717 if (debug) {
4718 log(LOG_DEBUG, "%s: %s output <%s id=0x%x len=%d",
4719 ifp->if_xname, cp->name,
4720 sppp_auth_type_name(cp->proto, lh->type),
4721 lh->ident, ntohs(lh->len));
4722 if (len)
4723 sppp_print_bytes((u_char *)(lh + 1), len);
4724 addlog(">\n");
4725 }
4726 if (IF_QFULL(&sp->pp_cpq)) {
4727 IF_DROP(&sp->pp_fastq);
4728 IF_DROP(&ifp->if_snd);
4729 m_freem(m);
4730 ++ifp->if_oerrors;
4731 return;
4732 } else
4733 IF_ENQUEUE(&sp->pp_cpq, m);
4734 if (! (ifp->if_flags & IFF_OACTIVE))
4735 (*ifp->if_start)(ifp);
4736 ifp->if_obytes += m->m_pkthdr.len + 3;
4737 }
4738
4739 /*
4740 * Send keepalive packets, every 10 seconds.
4741 */
4742 static void
4743 sppp_keepalive(void *dummy)
4744 {
4745 struct sppp *sp;
4746 int s;
4747 time_t now;
4748
4749 s = splnet();
4750 now = time_uptime;
4751 for (sp=spppq; sp; sp=sp->pp_next) {
4752 struct ifnet *ifp = &sp->pp_if;
4753
4754 /* check idle timeout */
4755 if ((sp->pp_idle_timeout != 0) && (ifp->if_flags & IFF_RUNNING)
4756 && (sp->pp_phase == SPPP_PHASE_NETWORK)) {
4757 /* idle timeout is enabled for this interface */
4758 if ((now-sp->pp_last_activity) >= sp->pp_idle_timeout) {
4759 if (ifp->if_flags & IFF_DEBUG)
4760 printf("%s: no activity for %lu seconds\n",
4761 sp->pp_if.if_xname,
4762 (unsigned long)(now-sp->pp_last_activity));
4763 lcp.Close(sp);
4764 continue;
4765 }
4766 }
4767
4768 /* Keepalive mode disabled or channel down? */
4769 if (! (sp->pp_flags & PP_KEEPALIVE) ||
4770 ! (ifp->if_flags & IFF_RUNNING))
4771 continue;
4772
4773 /* No keepalive in PPP mode if LCP not opened yet. */
4774 if (! (sp->pp_flags & PP_CISCO) &&
4775 sp->pp_phase < SPPP_PHASE_AUTHENTICATE)
4776 continue;
4777
4778 /* No echo reply, but maybe user data passed through? */
4779 if ((now - sp->pp_last_receive) < sp->pp_max_noreceive) {
4780 sp->pp_alivecnt = 0;
4781 continue;
4782 }
4783
4784 if (sp->pp_alivecnt >= sp->pp_maxalive) {
4785 /* No keepalive packets got. Stop the interface. */
4786 if_down (ifp);
4787 IF_PURGE(&sp->pp_cpq);
4788 if (! (sp->pp_flags & PP_CISCO)) {
4789 printf("%s: LCP keepalive timed out, going to restart the connection\n",
4790 ifp->if_xname);
4791 sp->pp_alivecnt = 0;
4792
4793 /* we are down, close all open protocols */
4794 lcp.Close(sp);
4795
4796 /* And now prepare LCP to reestablish the link, if configured to do so. */
4797 sppp_cp_change_state(&lcp, sp, STATE_STOPPED);
4798
4799 /* Close connection immediately, completition of this
4800 * will summon the magic needed to reestablish it. */
4801 if (sp->pp_tlf)
4802 sp->pp_tlf(sp);
4803 continue;
4804 }
4805 }
4806 if (sp->pp_alivecnt < sp->pp_maxalive)
4807 ++sp->pp_alivecnt;
4808 if (sp->pp_flags & PP_CISCO)
4809 sppp_cisco_send(sp, CISCO_KEEPALIVE_REQ,
4810 ++sp->pp_seq[IDX_LCP], sp->pp_rseq[IDX_LCP]);
4811 else if (sp->pp_phase >= SPPP_PHASE_AUTHENTICATE) {
4812 int32_t nmagic = htonl(sp->lcp.magic);
4813 sp->lcp.echoid = ++sp->pp_seq[IDX_LCP];
4814 sppp_cp_send(sp, PPP_LCP, ECHO_REQ,
4815 sp->lcp.echoid, 4, &nmagic);
4816 }
4817 }
4818 splx(s);
4819 callout_reset(&keepalive_ch, hz * LCP_KEEPALIVE_INTERVAL, sppp_keepalive, NULL);
4820 }
4821
4822 #ifdef INET
4823 /*
4824 * Get both IP addresses.
4825 */
4826 static void
4827 sppp_get_ip_addrs(struct sppp *sp, uint32_t *src, uint32_t *dst, uint32_t *srcmask)
4828 {
4829 struct ifnet *ifp = &sp->pp_if;
4830 struct ifaddr *ifa;
4831 struct sockaddr_in *si, *sm;
4832 uint32_t ssrc, ddst;
4833
4834 sm = NULL;
4835 ssrc = ddst = 0;
4836 /*
4837 * Pick the first AF_INET address from the list,
4838 * aliases don't make any sense on a p2p link anyway.
4839 */
4840 si = 0;
4841 IFADDR_FOREACH(ifa, ifp) {
4842 if (ifa->ifa_addr->sa_family == AF_INET) {
4843 si = (struct sockaddr_in *)ifa->ifa_addr;
4844 sm = (struct sockaddr_in *)ifa->ifa_netmask;
4845 if (si)
4846 break;
4847 }
4848 }
4849 if (ifa) {
4850 if (si && si->sin_addr.s_addr) {
4851 ssrc = si->sin_addr.s_addr;
4852 if (srcmask)
4853 *srcmask = ntohl(sm->sin_addr.s_addr);
4854 }
4855
4856 si = (struct sockaddr_in *)ifa->ifa_dstaddr;
4857 if (si && si->sin_addr.s_addr)
4858 ddst = si->sin_addr.s_addr;
4859 }
4860
4861 if (dst) *dst = ntohl(ddst);
4862 if (src) *src = ntohl(ssrc);
4863 }
4864
4865 /*
4866 * Set IP addresses. Must be called at splnet.
4867 * If an address is 0, leave it the way it is.
4868 */
4869 static void
4870 sppp_set_ip_addrs(struct sppp *sp, uint32_t myaddr, uint32_t hisaddr)
4871 {
4872 STDDCL;
4873 struct ifaddr *ifa;
4874 struct sockaddr_in *si, *dest;
4875
4876 /*
4877 * Pick the first AF_INET address from the list,
4878 * aliases don't make any sense on a p2p link anyway.
4879 */
4880
4881 IFADDR_FOREACH(ifa, ifp) {
4882 if (ifa->ifa_addr->sa_family == AF_INET) {
4883 si = (struct sockaddr_in *)ifa->ifa_addr;
4884 dest = (struct sockaddr_in *)ifa->ifa_dstaddr;
4885 goto found;
4886 }
4887 }
4888 return;
4889
4890 found:
4891 {
4892 int error;
4893 struct sockaddr_in new_sin = *si;
4894 struct sockaddr_in new_dst = *dest;
4895
4896 /*
4897 * Scrub old routes now instead of calling in_ifinit with
4898 * scrub=1, because we may change the dstaddr
4899 * before the call to in_ifinit.
4900 */
4901 in_ifscrub(ifp, ifatoia(ifa));
4902
4903 if (myaddr != 0)
4904 new_sin.sin_addr.s_addr = htonl(myaddr);
4905 if (hisaddr != 0) {
4906 new_dst.sin_addr.s_addr = htonl(hisaddr);
4907 if (new_dst.sin_addr.s_addr != dest->sin_addr.s_addr) {
4908 sp->ipcp.saved_hisaddr = dest->sin_addr.s_addr;
4909 *dest = new_dst; /* fix dstaddr in place */
4910 }
4911 }
4912 error = in_ifinit(ifp, ifatoia(ifa), &new_sin, 0);
4913 if (debug && error)
4914 {
4915 log(LOG_DEBUG, "%s: sppp_set_ip_addrs: in_ifinit "
4916 " failed, error=%d\n", ifp->if_xname, error);
4917 }
4918 #ifdef PFIL_HOOKS
4919 if (!error)
4920 (void)pfil_run_hooks(&if_pfil,
4921 (struct mbuf **)SIOCAIFADDR, ifp, PFIL_IFADDR);
4922 #endif
4923 }
4924 }
4925
4926 /*
4927 * Clear IP addresses. Must be called at splnet.
4928 */
4929 static void
4930 sppp_clear_ip_addrs(struct sppp *sp)
4931 {
4932 struct ifnet *ifp = &sp->pp_if;
4933 struct ifaddr *ifa;
4934 struct sockaddr_in *si, *dest;
4935
4936 uint32_t remote;
4937 if (sp->ipcp.flags & IPCP_HISADDR_DYN)
4938 remote = sp->ipcp.saved_hisaddr;
4939 else
4940 sppp_get_ip_addrs(sp, 0, &remote, 0);
4941
4942 /*
4943 * Pick the first AF_INET address from the list,
4944 * aliases don't make any sense on a p2p link anyway.
4945 */
4946
4947 IFADDR_FOREACH(ifa, ifp) {
4948 if (ifa->ifa_addr->sa_family == AF_INET) {
4949 si = (struct sockaddr_in *)ifa->ifa_addr;
4950 dest = (struct sockaddr_in *)ifa->ifa_dstaddr;
4951 goto found;
4952 }
4953 }
4954 return;
4955
4956 found:
4957 {
4958 struct sockaddr_in new_sin = *si;
4959
4960 in_ifscrub(ifp, ifatoia(ifa));
4961 if (sp->ipcp.flags & IPCP_MYADDR_DYN)
4962 new_sin.sin_addr.s_addr = 0;
4963 if (sp->ipcp.flags & IPCP_HISADDR_DYN)
4964 /* replace peer addr in place */
4965 dest->sin_addr.s_addr = sp->ipcp.saved_hisaddr;
4966 in_ifinit(ifp, ifatoia(ifa), &new_sin, 0);
4967 #ifdef PFIL_HOOKS
4968 (void)pfil_run_hooks(&if_pfil,
4969 (struct mbuf **)SIOCDIFADDR, ifp, PFIL_IFADDR);
4970 #endif
4971 }
4972 }
4973 #endif
4974
4975 #ifdef INET6
4976 /*
4977 * Get both IPv6 addresses.
4978 */
4979 static void
4980 sppp_get_ip6_addrs(struct sppp *sp, struct in6_addr *src, struct in6_addr *dst,
4981 struct in6_addr *srcmask)
4982 {
4983 struct ifnet *ifp = &sp->pp_if;
4984 struct ifaddr *ifa;
4985 struct sockaddr_in6 *si, *sm;
4986 struct in6_addr ssrc, ddst;
4987
4988 sm = NULL;
4989 memset(&ssrc, 0, sizeof(ssrc));
4990 memset(&ddst, 0, sizeof(ddst));
4991 /*
4992 * Pick the first link-local AF_INET6 address from the list,
4993 * aliases don't make any sense on a p2p link anyway.
4994 */
4995 si = 0;
4996 IFADDR_FOREACH(ifa, ifp)
4997 if (ifa->ifa_addr->sa_family == AF_INET6) {
4998 si = (struct sockaddr_in6 *)ifa->ifa_addr;
4999 sm = (struct sockaddr_in6 *)ifa->ifa_netmask;
5000 if (si && IN6_IS_ADDR_LINKLOCAL(&si->sin6_addr))
5001 break;
5002 }
5003 if (ifa) {
5004 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr)) {
5005 memcpy(&ssrc, &si->sin6_addr, sizeof(ssrc));
5006 if (srcmask) {
5007 memcpy(srcmask, &sm->sin6_addr,
5008 sizeof(*srcmask));
5009 }
5010 }
5011
5012 si = (struct sockaddr_in6 *)ifa->ifa_dstaddr;
5013 if (si && !IN6_IS_ADDR_UNSPECIFIED(&si->sin6_addr))
5014 memcpy(&ddst, &si->sin6_addr, sizeof(ddst));
5015 }
5016
5017 if (dst)
5018 memcpy(dst, &ddst, sizeof(*dst));
5019 if (src)
5020 memcpy(src, &ssrc, sizeof(*src));
5021 }
5022
5023 #ifdef IPV6CP_MYIFID_DYN
5024 /*
5025 * Generate random ifid.
5026 */
5027 static void
5028 sppp_gen_ip6_addr(struct sppp *sp, struct in6_addr *addr)
5029 {
5030 /* TBD */
5031 }
5032
5033 /*
5034 * Set my IPv6 address. Must be called at splnet.
5035 */
5036 static void
5037 sppp_set_ip6_addr(struct sppp *sp, const struct in6_addr *src)
5038 {
5039 STDDCL;
5040 struct ifaddr *ifa;
5041 struct sockaddr_in6 *sin6;
5042
5043 /*
5044 * Pick the first link-local AF_INET6 address from the list,
5045 * aliases don't make any sense on a p2p link anyway.
5046 */
5047
5048 sin6 = NULL;
5049 IFADDR_FOREACH(ifa, ifp)
5050 {
5051 if (ifa->ifa_addr->sa_family == AF_INET6)
5052 {
5053 sin6 = (struct sockaddr_in6 *)ifa->ifa_addr;
5054 if (sin6 && IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr))
5055 break;
5056 }
5057 }
5058
5059 if (ifa && sin6)
5060 {
5061 int error;
5062 struct sockaddr_in6 new_sin6 = *sin6;
5063
5064 memcpy(&new_sin6.sin6_addr, src, sizeof(new_sin6.sin6_addr));
5065 error = in6_ifinit(ifp, ifatoia6(ifa), &new_sin6, 1);
5066 if (debug && error)
5067 {
5068 log(LOG_DEBUG, "%s: sppp_set_ip6_addr: in6_ifinit "
5069 " failed, error=%d\n", ifp->if_xname, error);
5070 }
5071 #ifdef PFIL_HOOKS
5072 if (!error)
5073 (void)pfil_run_hooks(&if_pfil,
5074 (struct mbuf **)SIOCAIFADDR_IN6, ifp, PFIL_IFADDR);
5075 #endif
5076 }
5077 }
5078 #endif
5079
5080 /*
5081 * Suggest a candidate address to be used by peer.
5082 */
5083 static void
5084 sppp_suggest_ip6_addr(struct sppp *sp, struct in6_addr *suggest)
5085 {
5086 struct in6_addr myaddr;
5087 struct timeval tv;
5088
5089 sppp_get_ip6_addrs(sp, &myaddr, 0, 0);
5090
5091 myaddr.s6_addr[8] &= ~0x02; /* u bit to "local" */
5092 microtime(&tv);
5093 if ((tv.tv_usec & 0xff) == 0 && (tv.tv_sec & 0xff) == 0) {
5094 myaddr.s6_addr[14] ^= 0xff;
5095 myaddr.s6_addr[15] ^= 0xff;
5096 } else {
5097 myaddr.s6_addr[14] ^= (tv.tv_usec & 0xff);
5098 myaddr.s6_addr[15] ^= (tv.tv_sec & 0xff);
5099 }
5100 if (suggest)
5101 memcpy(suggest, &myaddr, sizeof(myaddr));
5102 }
5103 #endif /*INET6*/
5104
5105 /*
5106 * Process ioctl requests specific to the PPP interface.
5107 * Permissions have already been checked.
5108 */
5109 static int
5110 sppp_params(struct sppp *sp, u_long cmd, void *data)
5111 {
5112 switch (cmd) {
5113 case SPPPGETAUTHCFG:
5114 {
5115 struct spppauthcfg *cfg = (struct spppauthcfg *)data;
5116 int error;
5117 size_t len;
5118
5119 cfg->myauthflags = sp->myauth.flags;
5120 cfg->hisauthflags = sp->hisauth.flags;
5121 strncpy(cfg->ifname, sp->pp_if.if_xname, IFNAMSIZ);
5122 cfg->hisauth = 0;
5123 if (sp->hisauth.proto)
5124 cfg->hisauth = (sp->hisauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP;
5125 cfg->myauth = 0;
5126 if (sp->myauth.proto)
5127 cfg->myauth = (sp->myauth.proto == PPP_PAP) ? SPPP_AUTHPROTO_PAP : SPPP_AUTHPROTO_CHAP;
5128 if (cfg->myname_length == 0) {
5129 if (sp->myauth.name != NULL)
5130 cfg->myname_length = sp->myauth.name_len + 1;
5131 } else {
5132 if (sp->myauth.name == NULL) {
5133 cfg->myname_length = 0;
5134 } else {
5135 len = sp->myauth.name_len + 1;
5136 if (cfg->myname_length < len)
5137 return (ENAMETOOLONG);
5138 error = copyout(sp->myauth.name, cfg->myname, len);
5139 if (error) return error;
5140 }
5141 }
5142 if (cfg->hisname_length == 0) {
5143 if (sp->hisauth.name != NULL)
5144 cfg->hisname_length = sp->hisauth.name_len + 1;
5145 } else {
5146 if (sp->hisauth.name == NULL) {
5147 cfg->hisname_length = 0;
5148 } else {
5149 len = sp->hisauth.name_len + 1;
5150 if (cfg->hisname_length < len)
5151 return (ENAMETOOLONG);
5152 error = copyout(sp->hisauth.name, cfg->hisname, len);
5153 if (error) return error;
5154 }
5155 }
5156 }
5157 break;
5158 case SPPPSETAUTHCFG:
5159 {
5160 struct spppauthcfg *cfg = (struct spppauthcfg *)data;
5161 int error;
5162
5163 if (sp->myauth.name) {
5164 free(sp->myauth.name, M_DEVBUF);
5165 sp->myauth.name = NULL;
5166 }
5167 if (sp->myauth.secret) {
5168 free(sp->myauth.secret, M_DEVBUF);
5169 sp->myauth.secret = NULL;
5170 }
5171 if (sp->hisauth.name) {
5172 free(sp->hisauth.name, M_DEVBUF);
5173 sp->hisauth.name = NULL;
5174 }
5175 if (sp->hisauth.secret) {
5176 free(sp->hisauth.secret, M_DEVBUF);
5177 sp->hisauth.secret = NULL;
5178 }
5179
5180 if (cfg->hisname != NULL && cfg->hisname_length > 0) {
5181 if (cfg->hisname_length >= MCLBYTES)
5182 return (ENAMETOOLONG);
5183 sp->hisauth.name = malloc(cfg->hisname_length, M_DEVBUF, M_WAITOK);
5184 error = copyin(cfg->hisname, sp->hisauth.name, cfg->hisname_length);
5185 if (error) {
5186 free(sp->hisauth.name, M_DEVBUF);
5187 sp->hisauth.name = NULL;
5188 return error;
5189 }
5190 sp->hisauth.name_len = cfg->hisname_length - 1;
5191 sp->hisauth.name[sp->hisauth.name_len] = 0;
5192 }
5193 if (cfg->hissecret != NULL && cfg->hissecret_length > 0) {
5194 if (cfg->hissecret_length >= MCLBYTES)
5195 return (ENAMETOOLONG);
5196 sp->hisauth.secret = malloc(cfg->hissecret_length, M_DEVBUF, M_WAITOK);
5197 error = copyin(cfg->hissecret, sp->hisauth.secret, cfg->hissecret_length);
5198 if (error) {
5199 free(sp->hisauth.secret, M_DEVBUF);
5200 sp->hisauth.secret = NULL;
5201 return error;
5202 }
5203 sp->hisauth.secret_len = cfg->hissecret_length - 1;
5204 sp->hisauth.secret[sp->hisauth.secret_len] = 0;
5205 }
5206 if (cfg->myname != NULL && cfg->myname_length > 0) {
5207 if (cfg->myname_length >= MCLBYTES)
5208 return (ENAMETOOLONG);
5209 sp->myauth.name = malloc(cfg->myname_length, M_DEVBUF, M_WAITOK);
5210 error = copyin(cfg->myname, sp->myauth.name, cfg->myname_length);
5211 if (error) {
5212 free(sp->myauth.name, M_DEVBUF);
5213 sp->myauth.name = NULL;
5214 return error;
5215 }
5216 sp->myauth.name_len = cfg->myname_length - 1;
5217 sp->myauth.name[sp->myauth.name_len] = 0;
5218 }
5219 if (cfg->mysecret != NULL && cfg->mysecret_length > 0) {
5220 if (cfg->mysecret_length >= MCLBYTES)
5221 return (ENAMETOOLONG);
5222 sp->myauth.secret = malloc(cfg->mysecret_length, M_DEVBUF, M_WAITOK);
5223 error = copyin(cfg->mysecret, sp->myauth.secret, cfg->mysecret_length);
5224 if (error) {
5225 free(sp->myauth.secret, M_DEVBUF);
5226 sp->myauth.secret = NULL;
5227 return error;
5228 }
5229 sp->myauth.secret_len = cfg->mysecret_length - 1;
5230 sp->myauth.secret[sp->myauth.secret_len] = 0;
5231 }
5232 sp->myauth.flags = cfg->myauthflags;
5233 if (cfg->myauth)
5234 sp->myauth.proto = (cfg->myauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP;
5235 sp->hisauth.flags = cfg->hisauthflags;
5236 if (cfg->hisauth)
5237 sp->hisauth.proto = (cfg->hisauth == SPPP_AUTHPROTO_PAP) ? PPP_PAP : PPP_CHAP;
5238 sp->pp_auth_failures = 0;
5239 if (sp->hisauth.proto != 0)
5240 sp->lcp.opts |= (1 << LCP_OPT_AUTH_PROTO);
5241 else
5242 sp->lcp.opts &= ~(1 << LCP_OPT_AUTH_PROTO);
5243 }
5244 break;
5245 case SPPPGETLCPCFG:
5246 {
5247 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data;
5248 lcpp->lcp_timeout = sp->lcp.timeout;
5249 }
5250 break;
5251 case SPPPSETLCPCFG:
5252 {
5253 struct sppplcpcfg *lcpp = (struct sppplcpcfg *)data;
5254 sp->lcp.timeout = lcpp->lcp_timeout;
5255 }
5256 break;
5257 case SPPPGETSTATUS:
5258 {
5259 struct spppstatus *status = (struct spppstatus *)data;
5260 status->phase = sp->pp_phase;
5261 }
5262 break;
5263 case SPPPGETSTATUSNCP:
5264 {
5265 struct spppstatusncp *status = (struct spppstatusncp *)data;
5266 status->phase = sp->pp_phase;
5267 status->ncpup = sppp_ncp_check(sp);
5268 }
5269 break;
5270 case SPPPGETIDLETO:
5271 {
5272 struct spppidletimeout *to = (struct spppidletimeout *)data;
5273 to->idle_seconds = sp->pp_idle_timeout;
5274 }
5275 break;
5276 case SPPPSETIDLETO:
5277 {
5278 struct spppidletimeout *to = (struct spppidletimeout *)data;
5279 sp->pp_idle_timeout = to->idle_seconds;
5280 }
5281 break;
5282 case SPPPSETAUTHFAILURE:
5283 {
5284 struct spppauthfailuresettings *afsettings = (struct spppauthfailuresettings *)data;
5285 sp->pp_max_auth_fail = afsettings->max_failures;
5286 sp->pp_auth_failures = 0;
5287 }
5288 break;
5289 case SPPPGETAUTHFAILURES:
5290 {
5291 struct spppauthfailurestats *stats = (struct spppauthfailurestats *)data;
5292 stats->auth_failures = sp->pp_auth_failures;
5293 stats->max_failures = sp->pp_max_auth_fail;
5294 }
5295 break;
5296 case SPPPSETDNSOPTS:
5297 {
5298 struct spppdnssettings *req = (struct spppdnssettings *)data;
5299 sp->query_dns = req->query_dns & 3;
5300 }
5301 break;
5302 case SPPPGETDNSOPTS:
5303 {
5304 struct spppdnssettings *req = (struct spppdnssettings *)data;
5305 req->query_dns = sp->query_dns;
5306 }
5307 break;
5308 case SPPPGETDNSADDRS:
5309 {
5310 struct spppdnsaddrs *addrs = (struct spppdnsaddrs *)data;
5311 memcpy(&addrs->dns, &sp->dns_addrs, sizeof addrs->dns);
5312 }
5313 break;
5314 case SPPPGETKEEPALIVE:
5315 {
5316 struct spppkeepalivesettings *settings =
5317 (struct spppkeepalivesettings*)data;
5318 settings->maxalive = sp->pp_maxalive;
5319 settings->max_noreceive = sp->pp_max_noreceive;
5320 }
5321 break;
5322 case SPPPSETKEEPALIVE:
5323 {
5324 struct spppkeepalivesettings *settings =
5325 (struct spppkeepalivesettings*)data;
5326 sp->pp_maxalive = settings->maxalive;
5327 sp->pp_max_noreceive = settings->max_noreceive;
5328 }
5329 break;
5330 default:
5331 return (EINVAL);
5332 }
5333
5334 return (0);
5335 }
5336
5337 static void
5338 sppp_phase_network(struct sppp *sp)
5339 {
5340 STDDCL;
5341 int i;
5342 uint32_t mask;
5343
5344 sp->pp_phase = SPPP_PHASE_NETWORK;
5345
5346 if (debug)
5347 {
5348 log(LOG_INFO, "%s: phase %s\n", ifp->if_xname,
5349 sppp_phase_name(sp->pp_phase));
5350 }
5351
5352 /* Notify NCPs now. */
5353 for (i = 0; i < IDX_COUNT; i++)
5354 if ((cps[i])->flags & CP_NCP)
5355 (cps[i])->Open(sp);
5356
5357 /* Send Up events to all NCPs. */
5358 for (i = 0, mask = 1; i < IDX_COUNT; i++, mask <<= 1)
5359 if ((sp->lcp.protos & mask) && ((cps[i])->flags & CP_NCP))
5360 (cps[i])->Up(sp);
5361
5362 /* if no NCP is starting, all this was in vain, close down */
5363 sppp_lcp_check_and_close(sp);
5364 }
5365
5366
5367 static const char *
5368 sppp_cp_type_name(u_char type)
5369 {
5370 static char buf[12];
5371 switch (type) {
5372 case CONF_REQ: return "conf-req";
5373 case CONF_ACK: return "conf-ack";
5374 case CONF_NAK: return "conf-nak";
5375 case CONF_REJ: return "conf-rej";
5376 case TERM_REQ: return "term-req";
5377 case TERM_ACK: return "term-ack";
5378 case CODE_REJ: return "code-rej";
5379 case PROTO_REJ: return "proto-rej";
5380 case ECHO_REQ: return "echo-req";
5381 case ECHO_REPLY: return "echo-reply";
5382 case DISC_REQ: return "discard-req";
5383 }
5384 snprintf(buf, sizeof(buf), "0x%x", type);
5385 return buf;
5386 }
5387
5388 static const char *
5389 sppp_auth_type_name(u_short proto, u_char type)
5390 {
5391 static char buf[12];
5392 switch (proto) {
5393 case PPP_CHAP:
5394 switch (type) {
5395 case CHAP_CHALLENGE: return "challenge";
5396 case CHAP_RESPONSE: return "response";
5397 case CHAP_SUCCESS: return "success";
5398 case CHAP_FAILURE: return "failure";
5399 }
5400 case PPP_PAP:
5401 switch (type) {
5402 case PAP_REQ: return "req";
5403 case PAP_ACK: return "ack";
5404 case PAP_NAK: return "nak";
5405 }
5406 }
5407 snprintf(buf, sizeof(buf), "0x%x", type);
5408 return buf;
5409 }
5410
5411 static const char *
5412 sppp_lcp_opt_name(u_char opt)
5413 {
5414 static char buf[12];
5415 switch (opt) {
5416 case LCP_OPT_MRU: return "mru";
5417 case LCP_OPT_ASYNC_MAP: return "async-map";
5418 case LCP_OPT_AUTH_PROTO: return "auth-proto";
5419 case LCP_OPT_QUAL_PROTO: return "qual-proto";
5420 case LCP_OPT_MAGIC: return "magic";
5421 case LCP_OPT_PROTO_COMP: return "proto-comp";
5422 case LCP_OPT_ADDR_COMP: return "addr-comp";
5423 }
5424 snprintf(buf, sizeof(buf), "0x%x", opt);
5425 return buf;
5426 }
5427
5428 static const char *
5429 sppp_ipcp_opt_name(u_char opt)
5430 {
5431 static char buf[12];
5432 switch (opt) {
5433 case IPCP_OPT_ADDRESSES: return "addresses";
5434 case IPCP_OPT_COMPRESSION: return "compression";
5435 case IPCP_OPT_ADDRESS: return "address";
5436 }
5437 snprintf(buf, sizeof(buf), "0x%x", opt);
5438 return buf;
5439 }
5440
5441 #ifdef INET6
5442 static const char *
5443 sppp_ipv6cp_opt_name(u_char opt)
5444 {
5445 static char buf[12];
5446 switch (opt) {
5447 case IPV6CP_OPT_IFID: return "ifid";
5448 case IPV6CP_OPT_COMPRESSION: return "compression";
5449 }
5450 snprintf(buf, sizeof(buf), "0x%x", opt);
5451 return buf;
5452 }
5453 #endif
5454
5455 static const char *
5456 sppp_state_name(int state)
5457 {
5458 switch (state) {
5459 case STATE_INITIAL: return "initial";
5460 case STATE_STARTING: return "starting";
5461 case STATE_CLOSED: return "closed";
5462 case STATE_STOPPED: return "stopped";
5463 case STATE_CLOSING: return "closing";
5464 case STATE_STOPPING: return "stopping";
5465 case STATE_REQ_SENT: return "req-sent";
5466 case STATE_ACK_RCVD: return "ack-rcvd";
5467 case STATE_ACK_SENT: return "ack-sent";
5468 case STATE_OPENED: return "opened";
5469 }
5470 return "illegal";
5471 }
5472
5473 static const char *
5474 sppp_phase_name(int phase)
5475 {
5476 switch (phase) {
5477 case SPPP_PHASE_DEAD: return "dead";
5478 case SPPP_PHASE_ESTABLISH: return "establish";
5479 case SPPP_PHASE_TERMINATE: return "terminate";
5480 case SPPP_PHASE_AUTHENTICATE: return "authenticate";
5481 case SPPP_PHASE_NETWORK: return "network";
5482 }
5483 return "illegal";
5484 }
5485
5486 static const char *
5487 sppp_proto_name(u_short proto)
5488 {
5489 static char buf[12];
5490 switch (proto) {
5491 case PPP_LCP: return "lcp";
5492 case PPP_IPCP: return "ipcp";
5493 case PPP_PAP: return "pap";
5494 case PPP_CHAP: return "chap";
5495 case PPP_IPV6CP: return "ipv6cp";
5496 }
5497 snprintf(buf, sizeof(buf), "0x%x", (unsigned)proto);
5498 return buf;
5499 }
5500
5501 static void
5502 sppp_print_bytes(const u_char *p, u_short len)
5503 {
5504 addlog(" %02x", *p++);
5505 while (--len > 0)
5506 addlog("-%02x", *p++);
5507 }
5508
5509 static void
5510 sppp_print_string(const char *p, u_short len)
5511 {
5512 u_char c;
5513
5514 while (len-- > 0) {
5515 c = *p++;
5516 /*
5517 * Print only ASCII chars directly. RFC 1994 recommends
5518 * using only them, but we don't rely on it. */
5519 if (c < ' ' || c > '~')
5520 addlog("\\x%x", c);
5521 else
5522 addlog("%c", c);
5523 }
5524 }
5525
5526 static const char *
5527 sppp_dotted_quad(uint32_t addr)
5528 {
5529 static char s[16];
5530 snprintf(s, sizeof(s), "%d.%d.%d.%d",
5531 (int)((addr >> 24) & 0xff),
5532 (int)((addr >> 16) & 0xff),
5533 (int)((addr >> 8) & 0xff),
5534 (int)(addr & 0xff));
5535 return s;
5536 }
5537
5538 /* a dummy, used to drop uninteresting events */
5539 static void
5540 sppp_null(struct sppp *unused)
5541 {
5542 /* do just nothing */
5543 }
5544 /*
5545 * This file is large. Tell emacs to highlight it nevertheless.
5546 *
5547 * Local Variables:
5548 * hilit-auto-highlight-maxout: 120000
5549 * End:
5550 */
NetBSD on the FriendlyARM MINI2440