1 /*-
2 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
3 * based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
4 * Internet Initiative Japan, Inc (IIJ)
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD: src/usr.sbin/ppp/route.c,v 1.60.2.8 2003/04/05 10:39:05 ume Exp $
29 * $DragonFly: src/usr.sbin/ppp/route.c,v 1.3 2004/03/27 01:39:13 cpressey Exp $
30 */
31
32 #include <sys/param.h>
33 #include <sys/socket.h>
34 #include <net/if_types.h>
35 #include <net/route.h>
36 #include <net/if.h>
37 #include <netinet/in.h>
38 #include <arpa/inet.h>
39 #include <net/if_dl.h>
40 #include <netinet/in_systm.h>
41 #include <netinet/ip.h>
42 #include <sys/un.h>
43
44 #include <errno.h>
45 #include <stdarg.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <sys/sysctl.h>
50 #include <termios.h>
51 #include <unistd.h>
52
53 #include "layer.h"
54 #include "defs.h"
55 #include "command.h"
56 #include "mbuf.h"
57 #include "log.h"
58 #include "iplist.h"
59 #include "timer.h"
60 #include "throughput.h"
61 #include "lqr.h"
62 #include "hdlc.h"
63 #include "fsm.h"
64 #include "lcp.h"
65 #include "ccp.h"
66 #include "link.h"
67 #include "slcompress.h"
68 #include "ncpaddr.h"
69 #include "ipcp.h"
70 #include "filter.h"
71 #include "descriptor.h"
72 #include "mp.h"
73 #ifndef NORADIUS
74 #include "radius.h"
75 #endif
76 #include "ipv6cp.h"
77 #include "ncp.h"
78 #include "bundle.h"
79 #include "route.h"
80 #include "prompt.h"
81 #include "iface.h"
82 #include "id.h"
83
84
85 static void
p_sockaddr(struct prompt * prompt,struct sockaddr * phost,struct sockaddr * pmask,int width)86 p_sockaddr(struct prompt *prompt, struct sockaddr *phost,
87 struct sockaddr *pmask, int width)
88 {
89 struct ncprange range;
90 char buf[29];
91 struct sockaddr_dl *dl = (struct sockaddr_dl *)phost;
92
93 if (log_IsKept(LogDEBUG)) {
94 char tmp[50];
95
96 log_Printf(LogDEBUG, "Found the following sockaddr:\n");
97 log_Printf(LogDEBUG, " Family %d, len %d\n",
98 (int)phost->sa_family, (int)phost->sa_len);
99 inet_ntop(phost->sa_family, phost->sa_data, tmp, sizeof tmp);
100 log_Printf(LogDEBUG, " Addr %s\n", tmp);
101 if (pmask) {
102 inet_ntop(pmask->sa_family, pmask->sa_data, tmp, sizeof tmp);
103 log_Printf(LogDEBUG, " Mask %s\n", tmp);
104 }
105 }
106
107 switch (phost->sa_family) {
108 case AF_INET:
109 #ifndef NOINET6
110 case AF_INET6:
111 #endif
112 ncprange_setsa(&range, phost, pmask);
113 if (ncprange_isdefault(&range))
114 prompt_Printf(prompt, "%-*s ", width - 1, "default");
115 else
116 prompt_Printf(prompt, "%-*s ", width - 1, ncprange_ntoa(&range));
117 return;
118
119 case AF_LINK:
120 if (dl->sdl_nlen)
121 snprintf(buf, sizeof buf, "%.*s", dl->sdl_nlen, dl->sdl_data);
122 else if (dl->sdl_alen) {
123 if (dl->sdl_type == IFT_ETHER) {
124 if (dl->sdl_alen < sizeof buf / 3) {
125 int f;
126 u_char *MAC;
127
128 MAC = (u_char *)dl->sdl_data + dl->sdl_nlen;
129 for (f = 0; f < dl->sdl_alen; f++)
130 sprintf(buf+f*3, "%02x:", MAC[f]);
131 buf[f*3-1] = '\0';
132 } else
133 strcpy(buf, "??:??:??:??:??:??");
134 } else
135 sprintf(buf, "<IFT type %d>", dl->sdl_type);
136 } else if (dl->sdl_slen)
137 sprintf(buf, "<slen %d?>", dl->sdl_slen);
138 else
139 sprintf(buf, "link#%d", dl->sdl_index);
140 break;
141
142 default:
143 sprintf(buf, "<AF type %d>", phost->sa_family);
144 break;
145 }
146
147 prompt_Printf(prompt, "%-*s ", width-1, buf);
148 }
149
150 static struct bits {
151 u_int32_t b_mask;
152 char b_val;
153 } bits[] = {
154 { RTF_UP, 'U' },
155 { RTF_GATEWAY, 'G' },
156 { RTF_HOST, 'H' },
157 { RTF_REJECT, 'R' },
158 { RTF_DYNAMIC, 'D' },
159 { RTF_MODIFIED, 'M' },
160 { RTF_DONE, 'd' },
161 { RTF_CLONING, 'C' },
162 { RTF_XRESOLVE, 'X' },
163 { RTF_LLINFO, 'L' },
164 { RTF_STATIC, 'S' },
165 { RTF_PROTO1, '1' },
166 { RTF_PROTO2, '2' },
167 { RTF_BLACKHOLE, 'B' },
168 #ifdef RTF_WASCLONED
169 { RTF_WASCLONED, 'W' },
170 #endif
171 #ifdef RTF_PRCLONING
172 { RTF_PRCLONING, 'c' },
173 #endif
174 #ifdef RTF_PROTO3
175 { RTF_PROTO3, '3' },
176 #endif
177 #ifdef RTF_BROADCAST
178 { RTF_BROADCAST, 'b' },
179 #endif
180 { 0, '\0' }
181 };
182
183 #ifndef RTF_WASCLONED
184 #define RTF_WASCLONED (0)
185 #endif
186
187 static void
p_flags(struct prompt * prompt,u_int32_t f,unsigned max)188 p_flags(struct prompt *prompt, u_int32_t f, unsigned max)
189 {
190 char name[33], *flags;
191 struct bits *p = bits;
192
193 if (max > sizeof name - 1)
194 max = sizeof name - 1;
195
196 for (flags = name; p->b_mask && flags - name < (int)max; p++)
197 if (p->b_mask & f)
198 *flags++ = p->b_val;
199 *flags = '\0';
200 prompt_Printf(prompt, "%-*.*s", max, max, name);
201 }
202
203 static int route_nifs = -1;
204
205 const char *
Index2Nam(int idx)206 Index2Nam(int idx)
207 {
208 /*
209 * XXX: Maybe we should select() on the routing socket so that we can
210 * notice interfaces that come & go (PCCARD support).
211 * Or we could even support a signal that resets these so that
212 * the PCCARD insert/remove events can signal ppp.
213 */
214 static char **ifs; /* Figure these out once */
215 static int debug_done; /* Debug once */
216
217 if (idx > route_nifs || (idx > 0 && ifs[idx-1] == NULL)) {
218 int mib[6], have, had;
219 size_t needed;
220 char *buf, *ptr, *end;
221 struct sockaddr_dl *dl;
222 struct if_msghdr *ifm;
223
224 if (ifs) {
225 free(ifs);
226 ifs = NULL;
227 route_nifs = 0;
228 }
229 debug_done = 0;
230
231 mib[0] = CTL_NET;
232 mib[1] = PF_ROUTE;
233 mib[2] = 0;
234 mib[3] = 0;
235 mib[4] = NET_RT_IFLIST;
236 mib[5] = 0;
237
238 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
239 log_Printf(LogERROR, "Index2Nam: sysctl: estimate: %s\n",
240 strerror(errno));
241 return NumStr(idx, NULL, 0);
242 }
243 if ((buf = malloc(needed)) == NULL)
244 return NumStr(idx, NULL, 0);
245 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
246 free(buf);
247 return NumStr(idx, NULL, 0);
248 }
249 end = buf + needed;
250
251 have = 0;
252 for (ptr = buf; ptr < end; ptr += ifm->ifm_msglen) {
253 ifm = (struct if_msghdr *)ptr;
254 if (ifm->ifm_type != RTM_IFINFO)
255 continue;
256 dl = (struct sockaddr_dl *)(ifm + 1);
257 if (ifm->ifm_index > 0) {
258 if (ifm->ifm_index > have) {
259 char **newifs;
260
261 had = have;
262 have = ifm->ifm_index + 5;
263 if (had)
264 newifs = (char **)realloc(ifs, sizeof(char *) * have);
265 else
266 newifs = (char **)malloc(sizeof(char *) * have);
267 if (!newifs) {
268 log_Printf(LogDEBUG, "Index2Nam: %s\n", strerror(errno));
269 route_nifs = 0;
270 if (ifs) {
271 free(ifs);
272 ifs = NULL;
273 }
274 free(buf);
275 return NumStr(idx, NULL, 0);
276 }
277 ifs = newifs;
278 memset(ifs + had, '\0', sizeof(char *) * (have - had));
279 }
280 if (ifs[ifm->ifm_index-1] == NULL) {
281 ifs[ifm->ifm_index-1] = (char *)malloc(dl->sdl_nlen+1);
282 memcpy(ifs[ifm->ifm_index-1], dl->sdl_data, dl->sdl_nlen);
283 ifs[ifm->ifm_index-1][dl->sdl_nlen] = '\0';
284 if (route_nifs < ifm->ifm_index)
285 route_nifs = ifm->ifm_index;
286 }
287 } else if (log_IsKept(LogDEBUG))
288 log_Printf(LogDEBUG, "Skipping out-of-range interface %d!\n",
289 ifm->ifm_index);
290 }
291 free(buf);
292 }
293
294 if (log_IsKept(LogDEBUG) && !debug_done) {
295 int f;
296
297 log_Printf(LogDEBUG, "Found the following interfaces:\n");
298 for (f = 0; f < route_nifs; f++)
299 if (ifs[f] != NULL)
300 log_Printf(LogDEBUG, " Index %d, name \"%s\"\n", f+1, ifs[f]);
301 debug_done = 1;
302 }
303
304 if (idx < 1 || idx > route_nifs || ifs[idx-1] == NULL)
305 return NumStr(idx, NULL, 0);
306
307 return ifs[idx-1];
308 }
309
310 void
route_ParseHdr(struct rt_msghdr * rtm,struct sockaddr * sa[RTAX_MAX])311 route_ParseHdr(struct rt_msghdr *rtm, struct sockaddr *sa[RTAX_MAX])
312 {
313 char *wp;
314 int rtax;
315
316 wp = (char *)(rtm + 1);
317
318 for (rtax = 0; rtax < RTAX_MAX; rtax++)
319 if (rtm->rtm_addrs & (1 << rtax)) {
320 sa[rtax] = (struct sockaddr *)wp;
321 wp += RT_ROUNDUP(sa[rtax]->sa_len);
322 if (sa[rtax]->sa_family == 0)
323 sa[rtax] = NULL; /* ??? */
324 } else
325 sa[rtax] = NULL;
326 }
327
328 int
route_Show(struct cmdargs const * arg)329 route_Show(struct cmdargs const *arg)
330 {
331 struct rt_msghdr *rtm;
332 struct sockaddr *sa[RTAX_MAX];
333 char *sp, *ep, *cp;
334 size_t needed;
335 int mib[6];
336
337 mib[0] = CTL_NET;
338 mib[1] = PF_ROUTE;
339 mib[2] = 0;
340 mib[3] = 0;
341 mib[4] = NET_RT_DUMP;
342 mib[5] = 0;
343 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
344 log_Printf(LogERROR, "route_Show: sysctl: estimate: %s\n", strerror(errno));
345 return (1);
346 }
347 sp = malloc(needed);
348 if (sp == NULL)
349 return (1);
350 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) {
351 log_Printf(LogERROR, "route_Show: sysctl: getroute: %s\n", strerror(errno));
352 free(sp);
353 return (1);
354 }
355 ep = sp + needed;
356
357 prompt_Printf(arg->prompt, "%-20s%-20sFlags Netif\n",
358 "Destination", "Gateway");
359 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) {
360 rtm = (struct rt_msghdr *)cp;
361
362 route_ParseHdr(rtm, sa);
363
364 if (sa[RTAX_DST] && sa[RTAX_GATEWAY]) {
365 p_sockaddr(arg->prompt, sa[RTAX_DST], sa[RTAX_NETMASK], 20);
366 p_sockaddr(arg->prompt, sa[RTAX_GATEWAY], NULL, 20);
367
368 p_flags(arg->prompt, rtm->rtm_flags, 6);
369 prompt_Printf(arg->prompt, " %s\n", Index2Nam(rtm->rtm_index));
370 } else
371 prompt_Printf(arg->prompt, "<can't parse routing entry>\n");
372 }
373 free(sp);
374 return 0;
375 }
376
377 /*
378 * Delete routes associated with our interface
379 */
380 void
route_IfDelete(struct bundle * bundle,int all)381 route_IfDelete(struct bundle *bundle, int all)
382 {
383 struct rt_msghdr *rtm;
384 struct sockaddr *sa[RTAX_MAX];
385 struct ncprange range;
386 int pass;
387 size_t needed;
388 char *sp, *cp, *ep;
389 int mib[6];
390
391 log_Printf(LogDEBUG, "route_IfDelete (%d)\n", bundle->iface->index);
392
393 mib[0] = CTL_NET;
394 mib[1] = PF_ROUTE;
395 mib[2] = 0;
396 mib[3] = 0;
397 mib[4] = NET_RT_DUMP;
398 mib[5] = 0;
399 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
400 log_Printf(LogERROR, "route_IfDelete: sysctl: estimate: %s\n",
401 strerror(errno));
402 return;
403 }
404
405 sp = malloc(needed);
406 if (sp == NULL)
407 return;
408
409 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) {
410 log_Printf(LogERROR, "route_IfDelete: sysctl: getroute: %s\n",
411 strerror(errno));
412 free(sp);
413 return;
414 }
415 ep = sp + needed;
416
417 for (pass = 0; pass < 2; pass++) {
418 /*
419 * We do 2 passes. The first deletes all cloned routes. The second
420 * deletes all non-cloned routes. This is done to avoid
421 * potential errors from trying to delete route X after route Y where
422 * route X was cloned from route Y (and is no longer there 'cos it
423 * may have gone with route Y).
424 */
425 if (RTF_WASCLONED == 0 && pass == 0)
426 /* So we can't tell ! */
427 continue;
428 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) {
429 rtm = (struct rt_msghdr *)cp;
430 route_ParseHdr(rtm, sa);
431 if (rtm->rtm_index == bundle->iface->index &&
432 sa[RTAX_DST] && sa[RTAX_GATEWAY] &&
433 (sa[RTAX_DST]->sa_family == AF_INET
434 #ifndef NOINET6
435 || sa[RTAX_DST]->sa_family == AF_INET6
436 #endif
437 ) &&
438 (all || (rtm->rtm_flags & RTF_GATEWAY))) {
439 if (log_IsKept(LogDEBUG)) {
440 char gwstr[41];
441 struct ncpaddr gw;
442 ncprange_setsa(&range, sa[RTAX_DST], sa[RTAX_NETMASK]);
443 ncpaddr_setsa(&gw, sa[RTAX_GATEWAY]);
444 snprintf(gwstr, sizeof gwstr, "%s", ncpaddr_ntoa(&gw));
445 log_Printf(LogDEBUG, "Found %s %s\n", ncprange_ntoa(&range), gwstr);
446 }
447 if (sa[RTAX_GATEWAY]->sa_family == AF_INET ||
448 #ifndef NOINET6
449 sa[RTAX_GATEWAY]->sa_family == AF_INET6 ||
450 #endif
451 sa[RTAX_GATEWAY]->sa_family == AF_LINK) {
452 if ((pass == 0 && (rtm->rtm_flags & RTF_WASCLONED)) ||
453 (pass == 1 && !(rtm->rtm_flags & RTF_WASCLONED))) {
454 ncprange_setsa(&range, sa[RTAX_DST], sa[RTAX_NETMASK]);
455 rt_Set(bundle, RTM_DELETE, &range, NULL, 0, 0);
456 } else
457 log_Printf(LogDEBUG, "route_IfDelete: Skip it (pass %d)\n", pass);
458 } else
459 log_Printf(LogDEBUG,
460 "route_IfDelete: Can't remove routes for family %d\n",
461 sa[RTAX_GATEWAY]->sa_family);
462 }
463 }
464 }
465 free(sp);
466 }
467
468
469 /*
470 * Update the MTU on all routes for the given interface
471 */
472 void
route_UpdateMTU(struct bundle * bundle)473 route_UpdateMTU(struct bundle *bundle)
474 {
475 struct rt_msghdr *rtm;
476 struct sockaddr *sa[RTAX_MAX];
477 struct ncprange dst;
478 size_t needed;
479 char *sp, *cp, *ep;
480 int mib[6];
481
482 log_Printf(LogDEBUG, "route_UpdateMTU (%d)\n", bundle->iface->index);
483
484 mib[0] = CTL_NET;
485 mib[1] = PF_ROUTE;
486 mib[2] = 0;
487 mib[3] = 0;
488 mib[4] = NET_RT_DUMP;
489 mib[5] = 0;
490 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
491 log_Printf(LogERROR, "route_IfDelete: sysctl: estimate: %s\n",
492 strerror(errno));
493 return;
494 }
495
496 sp = malloc(needed);
497 if (sp == NULL)
498 return;
499
500 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) {
501 log_Printf(LogERROR, "route_IfDelete: sysctl: getroute: %s\n",
502 strerror(errno));
503 free(sp);
504 return;
505 }
506 ep = sp + needed;
507
508 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) {
509 rtm = (struct rt_msghdr *)cp;
510 route_ParseHdr(rtm, sa);
511 if (sa[RTAX_DST] && (sa[RTAX_DST]->sa_family == AF_INET
512 #ifndef NOINET6
513 || sa[RTAX_DST]->sa_family == AF_INET6
514 #endif
515 ) &&
516 sa[RTAX_GATEWAY] && rtm->rtm_index == bundle->iface->index) {
517 if (log_IsKept(LogTCPIP)) {
518 ncprange_setsa(&dst, sa[RTAX_DST], sa[RTAX_NETMASK]);
519 log_Printf(LogTCPIP, "route_UpdateMTU: Netif: %d (%s), dst %s,"
520 " mtu %lu\n", rtm->rtm_index, Index2Nam(rtm->rtm_index),
521 ncprange_ntoa(&dst), bundle->iface->mtu);
522 }
523 rt_Update(bundle, sa[RTAX_DST], sa[RTAX_GATEWAY], sa[RTAX_NETMASK]);
524 }
525 }
526
527 free(sp);
528 }
529
530 int
GetIfIndex(char * name)531 GetIfIndex(char *name)
532 {
533 int idx;
534
535 idx = 1;
536 while (route_nifs == -1 || idx < route_nifs)
537 if (strcmp(Index2Nam(idx), name) == 0)
538 return idx;
539 else
540 idx++;
541 return -1;
542 }
543
544 void
route_Change(struct bundle * bundle,struct sticky_route * r,const struct ncpaddr * me,const struct ncpaddr * peer)545 route_Change(struct bundle *bundle, struct sticky_route *r,
546 const struct ncpaddr *me, const struct ncpaddr *peer)
547 {
548 struct ncpaddr dst;
549
550 for (; r; r = r->next) {
551 ncprange_getaddr(&r->dst, &dst);
552 if (ncpaddr_family(me) == AF_INET) {
553 if ((r->type & ROUTE_DSTMYADDR) && !ncpaddr_equal(&dst, me)) {
554 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
555 ncprange_sethost(&r->dst, me);
556 if (r->type & ROUTE_GWHISADDR)
557 ncpaddr_copy(&r->gw, peer);
558 } else if ((r->type & ROUTE_DSTHISADDR) && !ncpaddr_equal(&dst, peer)) {
559 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
560 ncprange_sethost(&r->dst, peer);
561 if (r->type & ROUTE_GWHISADDR)
562 ncpaddr_copy(&r->gw, peer);
563 } else if ((r->type & ROUTE_DSTDNS0) && !ncpaddr_equal(&dst, peer)) {
564 if (bundle->ncp.ipcp.ns.dns[0].s_addr == INADDR_NONE)
565 continue;
566 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
567 if (r->type & ROUTE_GWHISADDR)
568 ncpaddr_copy(&r->gw, peer);
569 } else if ((r->type & ROUTE_DSTDNS1) && !ncpaddr_equal(&dst, peer)) {
570 if (bundle->ncp.ipcp.ns.dns[1].s_addr == INADDR_NONE)
571 continue;
572 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
573 if (r->type & ROUTE_GWHISADDR)
574 ncpaddr_copy(&r->gw, peer);
575 } else if ((r->type & ROUTE_GWHISADDR) && !ncpaddr_equal(&r->gw, peer))
576 ncpaddr_copy(&r->gw, peer);
577 #ifndef NOINET6
578 } else if (ncpaddr_family(me) == AF_INET6) {
579 if ((r->type & ROUTE_DSTMYADDR6) && !ncpaddr_equal(&dst, me)) {
580 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
581 ncprange_sethost(&r->dst, me);
582 if (r->type & ROUTE_GWHISADDR)
583 ncpaddr_copy(&r->gw, peer);
584 } else if ((r->type & ROUTE_DSTHISADDR6) && !ncpaddr_equal(&dst, peer)) {
585 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
586 ncprange_sethost(&r->dst, peer);
587 if (r->type & ROUTE_GWHISADDR)
588 ncpaddr_copy(&r->gw, peer);
589 } else if ((r->type & ROUTE_GWHISADDR6) && !ncpaddr_equal(&r->gw, peer))
590 ncpaddr_copy(&r->gw, peer);
591 #endif
592 }
593 rt_Set(bundle, RTM_ADD, &r->dst, &r->gw, 1, 0);
594 }
595 }
596
597 void
route_Add(struct sticky_route ** rp,int type,const struct ncprange * dst,const struct ncpaddr * gw)598 route_Add(struct sticky_route **rp, int type, const struct ncprange *dst,
599 const struct ncpaddr *gw)
600 {
601 struct sticky_route *r;
602 int dsttype = type & ROUTE_DSTANY;
603
604 r = NULL;
605 while (*rp) {
606 if ((dsttype && dsttype == ((*rp)->type & ROUTE_DSTANY)) ||
607 (!dsttype && ncprange_equal(&(*rp)->dst, dst))) {
608 /* Oops, we already have this route - unlink it */
609 free(r); /* impossible really */
610 r = *rp;
611 *rp = r->next;
612 } else
613 rp = &(*rp)->next;
614 }
615
616 if (!r)
617 r = (struct sticky_route *)malloc(sizeof(struct sticky_route));
618 r->type = type;
619 r->next = NULL;
620 ncprange_copy(&r->dst, dst);
621 ncpaddr_copy(&r->gw, gw);
622 *rp = r;
623 }
624
625 void
route_Delete(struct sticky_route ** rp,int type,const struct ncprange * dst)626 route_Delete(struct sticky_route **rp, int type, const struct ncprange *dst)
627 {
628 struct sticky_route *r;
629 int dsttype = type & ROUTE_DSTANY;
630
631 for (; *rp; rp = &(*rp)->next) {
632 if ((dsttype && dsttype == ((*rp)->type & ROUTE_DSTANY)) ||
633 (!dsttype && ncprange_equal(dst, &(*rp)->dst))) {
634 r = *rp;
635 *rp = r->next;
636 free(r);
637 break;
638 }
639 }
640 }
641
642 void
route_DeleteAll(struct sticky_route ** rp)643 route_DeleteAll(struct sticky_route **rp)
644 {
645 struct sticky_route *r, *rn;
646
647 for (r = *rp; r; r = rn) {
648 rn = r->next;
649 free(r);
650 }
651 *rp = NULL;
652 }
653
654 void
route_ShowSticky(struct prompt * p,struct sticky_route * r,const char * tag,int indent)655 route_ShowSticky(struct prompt *p, struct sticky_route *r, const char *tag,
656 int indent)
657 {
658 int tlen = strlen(tag);
659
660 if (tlen + 2 > indent)
661 prompt_Printf(p, "%s:\n%*s", tag, indent, "");
662 else
663 prompt_Printf(p, "%s:%*s", tag, indent - tlen - 1, "");
664
665 for (; r; r = r->next) {
666 prompt_Printf(p, "%*sadd ", tlen ? 0 : indent, "");
667 tlen = 0;
668 if (r->type & ROUTE_DSTMYADDR)
669 prompt_Printf(p, "MYADDR");
670 else if (r->type & ROUTE_DSTMYADDR6)
671 prompt_Printf(p, "MYADDR6");
672 else if (r->type & ROUTE_DSTHISADDR)
673 prompt_Printf(p, "HISADDR");
674 else if (r->type & ROUTE_DSTHISADDR6)
675 prompt_Printf(p, "HISADDR6");
676 else if (r->type & ROUTE_DSTDNS0)
677 prompt_Printf(p, "DNS0");
678 else if (r->type & ROUTE_DSTDNS1)
679 prompt_Printf(p, "DNS1");
680 else if (ncprange_isdefault(&r->dst))
681 prompt_Printf(p, "default");
682 else
683 prompt_Printf(p, "%s", ncprange_ntoa(&r->dst));
684
685 if (r->type & ROUTE_GWHISADDR)
686 prompt_Printf(p, " HISADDR\n");
687 else if (r->type & ROUTE_GWHISADDR6)
688 prompt_Printf(p, " HISADDR6\n");
689 else
690 prompt_Printf(p, " %s\n", ncpaddr_ntoa(&r->gw));
691 }
692 }
693
694 struct rtmsg {
695 struct rt_msghdr m_rtm;
696 char m_space[256];
697 };
698
699 static size_t
memcpy_roundup(char * cp,const void * data,size_t len)700 memcpy_roundup(char *cp, const void *data, size_t len)
701 {
702 size_t padlen;
703
704 padlen = RT_ROUNDUP(len);
705 memcpy(cp, data, len);
706 if (padlen > len)
707 memset(cp + len, '\0', padlen - len);
708
709 return padlen;
710 }
711
712 #if defined(__KAME__) && !defined(NOINET6)
713 static void
add_scope(struct sockaddr * sa,int ifindex)714 add_scope(struct sockaddr *sa, int ifindex)
715 {
716 struct sockaddr_in6 *sa6;
717
718 if (sa->sa_family != AF_INET6)
719 return;
720 sa6 = (struct sockaddr_in6 *)sa;
721 if (!IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr) &&
722 !IN6_IS_ADDR_MC_LINKLOCAL(&sa6->sin6_addr))
723 return;
724 if (*(u_int16_t *)&sa6->sin6_addr.s6_addr[2] != 0)
725 return;
726 *(u_int16_t *)&sa6->sin6_addr.s6_addr[2] = htons(ifindex);
727 }
728 #endif
729
730 int
rt_Set(struct bundle * bundle,int cmd,const struct ncprange * dst,const struct ncpaddr * gw,int bang,int quiet)731 rt_Set(struct bundle *bundle, int cmd, const struct ncprange *dst,
732 const struct ncpaddr *gw, int bang, int quiet)
733 {
734 struct rtmsg rtmes;
735 int s, nb, wb;
736 char *cp;
737 const char *cmdstr;
738 struct sockaddr_storage sadst, samask, sagw;
739 int result = 1;
740
741 if (bang)
742 cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!");
743 else
744 cmdstr = (cmd == RTM_ADD ? "Add" : "Delete");
745 s = ID0socket(PF_ROUTE, SOCK_RAW, 0);
746 if (s < 0) {
747 log_Printf(LogERROR, "rt_Set: socket(): %s\n", strerror(errno));
748 return result;
749 }
750 memset(&rtmes, '\0', sizeof rtmes);
751 rtmes.m_rtm.rtm_version = RTM_VERSION;
752 rtmes.m_rtm.rtm_type = cmd;
753 rtmes.m_rtm.rtm_addrs = RTA_DST;
754 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq;
755 rtmes.m_rtm.rtm_pid = getpid();
756 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;
757
758 if (cmd == RTM_ADD) {
759 if (bundle->ncp.cfg.sendpipe > 0) {
760 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.cfg.sendpipe;
761 rtmes.m_rtm.rtm_inits |= RTV_SPIPE;
762 }
763 if (bundle->ncp.cfg.recvpipe > 0) {
764 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.cfg.recvpipe;
765 rtmes.m_rtm.rtm_inits |= RTV_RPIPE;
766 }
767 }
768
769 ncprange_getsa(dst, &sadst, &samask);
770 #if defined(__KAME__) && !defined(NOINET6)
771 add_scope((struct sockaddr *)&sadst, bundle->iface->index);
772 #endif
773
774 cp = rtmes.m_space;
775 cp += memcpy_roundup(cp, &sadst, sadst.ss_len);
776 if (cmd == RTM_ADD) {
777 if (gw == NULL) {
778 log_Printf(LogERROR, "rt_Set: Program error\n");
779 close(s);
780 return result;
781 }
782 ncpaddr_getsa(gw, &sagw);
783 #if defined(__KAME__) && !defined(NOINET6)
784 add_scope((struct sockaddr *)&sagw, bundle->iface->index);
785 #endif
786 if (ncpaddr_isdefault(gw)) {
787 if (!quiet)
788 log_Printf(LogERROR, "rt_Set: Cannot add a route with"
789 " gateway 0.0.0.0\n");
790 close(s);
791 return result;
792 } else {
793 cp += memcpy_roundup(cp, &sagw, sagw.ss_len);
794 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY;
795 }
796 }
797
798 if (!ncprange_ishost(dst)) {
799 cp += memcpy_roundup(cp, &samask, samask.ss_len);
800 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK;
801 }
802
803 nb = cp - (char *)&rtmes;
804 rtmes.m_rtm.rtm_msglen = nb;
805 wb = ID0write(s, &rtmes, nb);
806 if (wb < 0) {
807 log_Printf(LogTCPIP, "rt_Set failure:\n");
808 log_Printf(LogTCPIP, "rt_Set: Cmd = %s\n", cmdstr);
809 log_Printf(LogTCPIP, "rt_Set: Dst = %s\n", ncprange_ntoa(dst));
810 if (gw != NULL)
811 log_Printf(LogTCPIP, "rt_Set: Gateway = %s\n", ncpaddr_ntoa(gw));
812 failed:
813 if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST ||
814 (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) {
815 if (!bang) {
816 log_Printf(LogWARN, "Add route failed: %s already exists\n",
817 ncprange_ntoa(dst));
818 result = 0; /* Don't add to our dynamic list */
819 } else {
820 rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE;
821 if ((wb = ID0write(s, &rtmes, nb)) < 0)
822 goto failed;
823 }
824 } else if (cmd == RTM_DELETE &&
825 (rtmes.m_rtm.rtm_errno == ESRCH ||
826 (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) {
827 if (!bang)
828 log_Printf(LogWARN, "Del route failed: %s: Non-existent\n",
829 ncprange_ntoa(dst));
830 } else if (rtmes.m_rtm.rtm_errno == 0) {
831 if (!quiet || errno != ENETUNREACH)
832 log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr,
833 ncprange_ntoa(dst), strerror(errno));
834 } else
835 log_Printf(LogWARN, "%s route failed: %s: %s\n",
836 cmdstr, ncprange_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno));
837 }
838
839 if (log_IsKept(LogDEBUG)) {
840 char gwstr[40];
841
842 if (gw)
843 snprintf(gwstr, sizeof gwstr, "%s", ncpaddr_ntoa(gw));
844 else
845 snprintf(gwstr, sizeof gwstr, "<none>");
846 log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %s, gateway = %s\n",
847 wb, cmdstr, ncprange_ntoa(dst), gwstr);
848 }
849 close(s);
850
851 return result;
852 }
853
854 void
rt_Update(struct bundle * bundle,const struct sockaddr * dst,const struct sockaddr * gw,const struct sockaddr * mask)855 rt_Update(struct bundle *bundle, const struct sockaddr *dst,
856 const struct sockaddr *gw, const struct sockaddr *mask)
857 {
858 struct ncprange ncpdst;
859 struct rtmsg rtmes;
860 char *p;
861 int s, wb;
862
863 s = ID0socket(PF_ROUTE, SOCK_RAW, 0);
864 if (s < 0) {
865 log_Printf(LogERROR, "rt_Update: socket(): %s\n", strerror(errno));
866 return;
867 }
868
869 memset(&rtmes, '\0', sizeof rtmes);
870 rtmes.m_rtm.rtm_version = RTM_VERSION;
871 rtmes.m_rtm.rtm_type = RTM_CHANGE;
872 rtmes.m_rtm.rtm_addrs = 0;
873 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq;
874 rtmes.m_rtm.rtm_pid = getpid();
875 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_STATIC;
876
877 if (bundle->ncp.cfg.sendpipe > 0) {
878 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.cfg.sendpipe;
879 rtmes.m_rtm.rtm_inits |= RTV_SPIPE;
880 }
881
882 if (bundle->ncp.cfg.recvpipe > 0) {
883 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.cfg.recvpipe;
884 rtmes.m_rtm.rtm_inits |= RTV_RPIPE;
885 }
886
887 rtmes.m_rtm.rtm_rmx.rmx_mtu = bundle->iface->mtu;
888 rtmes.m_rtm.rtm_inits |= RTV_MTU;
889 p = rtmes.m_space;
890
891 if (dst) {
892 rtmes.m_rtm.rtm_addrs |= RTA_DST;
893 p += memcpy_roundup(p, dst, dst->sa_len);
894 }
895
896 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY;
897 p += memcpy_roundup(p, gw, gw->sa_len);
898 if (mask) {
899 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK;
900 p += memcpy_roundup(p, mask, mask->sa_len);
901 }
902
903 rtmes.m_rtm.rtm_msglen = p - (char *)&rtmes;
904
905 wb = ID0write(s, &rtmes, rtmes.m_rtm.rtm_msglen);
906 if (wb < 0) {
907 ncprange_setsa(&ncpdst, dst, mask);
908
909 log_Printf(LogTCPIP, "rt_Update failure:\n");
910 log_Printf(LogTCPIP, "rt_Update: Dst = %s\n", ncprange_ntoa(&ncpdst));
911
912 if (rtmes.m_rtm.rtm_errno == 0)
913 log_Printf(LogWARN, "%s: Change route failed: errno: %s\n",
914 ncprange_ntoa(&ncpdst), strerror(errno));
915 else
916 log_Printf(LogWARN, "%s: Change route failed: %s\n",
917 ncprange_ntoa(&ncpdst), strerror(rtmes.m_rtm.rtm_errno));
918 }
919 close(s);
920 }
921