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 1.94.10.2.4.1 2010/12/21 17:10:29 kensmith Exp $
29 */
30
31 #include <sys/param.h>
32 #include <sys/socket.h>
33 #include <net/if_types.h>
34 #include <net/route.h>
35 #include <net/if.h>
36 #include <netinet/in.h>
37 #include <arpa/inet.h>
38 #include <net/if_dl.h>
39 #include <netinet/in_systm.h>
40 #include <netinet/ip.h>
41 #include <sys/un.h>
42
43 #include <errno.h>
44 #include <stdarg.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <sys/sysctl.h>
49 #include <termios.h>
50 #include <unistd.h>
51
52 #include "layer.h"
53 #include "defs.h"
54 #include "command.h"
55 #include "mbuf.h"
56 #include "log.h"
57 #include "iplist.h"
58 #include "timer.h"
59 #include "throughput.h"
60 #include "lqr.h"
61 #include "hdlc.h"
62 #include "fsm.h"
63 #include "lcp.h"
64 #include "ccp.h"
65 #include "link.h"
66 #include "slcompress.h"
67 #include "ncpaddr.h"
68 #include "ipcp.h"
69 #include "filter.h"
70 #include "descriptor.h"
71 #include "mp.h"
72 #ifndef NORADIUS
73 #include "radius.h"
74 #endif
75 #include "ipv6cp.h"
76 #include "ncp.h"
77 #include "bundle.h"
78 #include "route.h"
79 #include "prompt.h"
80 #include "iface.h"
81 #include "id.h"
82
83
84 static void
p_sockaddr(struct prompt * prompt,struct sockaddr * phost,struct sockaddr * pmask,int width)85 p_sockaddr(struct prompt *prompt, struct sockaddr *phost,
86 struct sockaddr *pmask, int width)
87 {
88 struct ncprange range;
89 char buf[29];
90 struct sockaddr_dl *dl = (struct sockaddr_dl *)phost;
91
92 if (log_IsKept(LogDEBUG)) {
93 char tmp[50];
94
95 log_Printf(LogDEBUG, "Found the following sockaddr:\n");
96 log_Printf(LogDEBUG, " Family %d, len %d\n",
97 (int)phost->sa_family, (int)phost->sa_len);
98 inet_ntop(phost->sa_family, phost->sa_data, tmp, sizeof tmp);
99 log_Printf(LogDEBUG, " Addr %s\n", tmp);
100 if (pmask) {
101 inet_ntop(pmask->sa_family, pmask->sa_data, tmp, sizeof tmp);
102 log_Printf(LogDEBUG, " Mask %s\n", tmp);
103 }
104 }
105
106 switch (phost->sa_family) {
107 case AF_INET:
108 #ifndef NOINET6
109 case AF_INET6:
110 #endif
111 ncprange_setsa(&range, phost, pmask);
112 if (ncprange_isdefault(&range))
113 prompt_Printf(prompt, "%-*s ", width - 1, "default");
114 else
115 prompt_Printf(prompt, "%-*s ", width - 1, ncprange_ntoa(&range));
116 return;
117
118 case AF_LINK:
119 if (dl->sdl_nlen)
120 snprintf(buf, sizeof buf, "%.*s", dl->sdl_nlen, dl->sdl_data);
121 else if (dl->sdl_alen) {
122 if (dl->sdl_type == IFT_ETHER) {
123 if (dl->sdl_alen < sizeof buf / 3) {
124 int f;
125 u_char *MAC;
126
127 MAC = (u_char *)dl->sdl_data + dl->sdl_nlen;
128 for (f = 0; f < dl->sdl_alen; f++)
129 sprintf(buf+f*3, "%02x:", MAC[f]);
130 buf[f*3-1] = '\0';
131 } else
132 strcpy(buf, "??:??:??:??:??:??");
133 } else
134 sprintf(buf, "<IFT type %d>", dl->sdl_type);
135 } else if (dl->sdl_slen)
136 sprintf(buf, "<slen %d?>", dl->sdl_slen);
137 else
138 sprintf(buf, "link#%d", dl->sdl_index);
139 break;
140
141 default:
142 sprintf(buf, "<AF type %d>", phost->sa_family);
143 break;
144 }
145
146 prompt_Printf(prompt, "%-*s ", width-1, buf);
147 }
148
149 static struct bits {
150 u_int32_t b_mask;
151 char b_val;
152 } bits[] = {
153 { RTF_UP, 'U' },
154 { RTF_GATEWAY, 'G' },
155 { RTF_HOST, 'H' },
156 { RTF_REJECT, 'R' },
157 { RTF_DYNAMIC, 'D' },
158 { RTF_MODIFIED, 'M' },
159 { RTF_DONE, 'd' },
160 { RTF_CLONING, 'C' },
161 { RTF_XRESOLVE, 'X' },
162 { RTF_LLINFO, 'L' },
163 { RTF_STATIC, 'S' },
164 { RTF_PROTO1, '1' },
165 { RTF_PROTO2, '2' },
166 { RTF_BLACKHOLE, 'B' },
167 #ifdef RTF_WASCLONED
168 { RTF_WASCLONED, 'W' },
169 #endif
170 #ifdef RTF_PRCLONING
171 { RTF_PRCLONING, 'c' },
172 #endif
173 #ifdef RTF_PROTO3
174 { RTF_PROTO3, '3' },
175 #endif
176 #ifdef RTF_BROADCAST
177 { RTF_BROADCAST, 'b' },
178 #endif
179 { 0, '\0' }
180 };
181
182 #ifndef RTF_WASCLONED
183 #define RTF_WASCLONED (0)
184 #endif
185
186 static void
p_flags(struct prompt * prompt,u_int32_t f,unsigned max)187 p_flags(struct prompt *prompt, u_int32_t f, unsigned max)
188 {
189 char name[33], *flags;
190 register struct bits *p = bits;
191
192 if (max > sizeof name - 1)
193 max = sizeof name - 1;
194
195 for (flags = name; p->b_mask && flags - name < (int)max; p++)
196 if (p->b_mask & f)
197 *flags++ = p->b_val;
198 *flags = '\0';
199 prompt_Printf(prompt, "%-*.*s", (int)max, (int)max, name);
200 }
201
202 static int route_nifs = -1;
203
204 const char *
Index2Nam(int idx)205 Index2Nam(int idx)
206 {
207 /*
208 * XXX: Maybe we should select() on the routing socket so that we can
209 * notice interfaces that come & go (PCCARD support).
210 * Or we could even support a signal that resets these so that
211 * the PCCARD insert/remove events can signal ppp.
212 */
213 static char **ifs; /* Figure these out once */
214 static int debug_done; /* Debug once */
215
216 if (idx > route_nifs || (idx > 0 && ifs[idx-1] == NULL)) {
217 int mib[6], have, had;
218 size_t needed;
219 char *buf, *ptr, *end;
220 struct sockaddr_dl *dl;
221 struct if_msghdr *ifm;
222
223 if (ifs) {
224 free(ifs);
225 ifs = NULL;
226 route_nifs = 0;
227 }
228 debug_done = 0;
229
230 mib[0] = CTL_NET;
231 mib[1] = PF_ROUTE;
232 mib[2] = 0;
233 mib[3] = 0;
234 mib[4] = NET_RT_IFLIST;
235 mib[5] = 0;
236
237 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
238 log_Printf(LogERROR, "Index2Nam: sysctl: estimate: %s\n",
239 strerror(errno));
240 return NumStr(idx, NULL, 0);
241 }
242 if ((buf = malloc(needed)) == NULL)
243 return NumStr(idx, NULL, 0);
244 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) {
245 free(buf);
246 return NumStr(idx, NULL, 0);
247 }
248 end = buf + needed;
249
250 have = 0;
251 for (ptr = buf; ptr < end; ptr += ifm->ifm_msglen) {
252 ifm = (struct if_msghdr *)ptr;
253 if (ifm->ifm_type != RTM_IFINFO)
254 continue;
255 dl = (struct sockaddr_dl *)(ifm + 1);
256 if (ifm->ifm_index > 0) {
257 if (ifm->ifm_index > have) {
258 char **newifs;
259
260 had = have;
261 have = ifm->ifm_index + 5;
262 if (had)
263 newifs = (char **)realloc(ifs, sizeof(char *) * have);
264 else
265 newifs = (char **)malloc(sizeof(char *) * have);
266 if (!newifs) {
267 log_Printf(LogDEBUG, "Index2Nam: %s\n", strerror(errno));
268 route_nifs = 0;
269 if (ifs) {
270 free(ifs);
271 ifs = NULL;
272 }
273 free(buf);
274 return NumStr(idx, NULL, 0);
275 }
276 ifs = newifs;
277 memset(ifs + had, '\0', sizeof(char *) * (have - had));
278 }
279 if (ifs[ifm->ifm_index-1] == NULL) {
280 ifs[ifm->ifm_index-1] = (char *)malloc(dl->sdl_nlen+1);
281 if (ifs[ifm->ifm_index-1] == NULL)
282 log_Printf(LogDEBUG, "Skipping interface %d: Out of memory\n",
283 ifm->ifm_index);
284 else {
285 memcpy(ifs[ifm->ifm_index-1], dl->sdl_data, dl->sdl_nlen);
286 ifs[ifm->ifm_index-1][dl->sdl_nlen] = '\0';
287 if (route_nifs < ifm->ifm_index)
288 route_nifs = ifm->ifm_index;
289 }
290 }
291 } else if (log_IsKept(LogDEBUG))
292 log_Printf(LogDEBUG, "Skipping out-of-range interface %d!\n",
293 ifm->ifm_index);
294 }
295 free(buf);
296 }
297
298 if (log_IsKept(LogDEBUG) && !debug_done) {
299 int f;
300
301 log_Printf(LogDEBUG, "Found the following interfaces:\n");
302 for (f = 0; f < route_nifs; f++)
303 if (ifs[f] != NULL)
304 log_Printf(LogDEBUG, " Index %d, name \"%s\"\n", f+1, ifs[f]);
305 debug_done = 1;
306 }
307
308 if (idx < 1 || idx > route_nifs || ifs[idx-1] == NULL)
309 return NumStr(idx, NULL, 0);
310
311 return ifs[idx-1];
312 }
313
314 void
route_ParseHdr(struct rt_msghdr * rtm,struct sockaddr * sa[RTAX_MAX])315 route_ParseHdr(struct rt_msghdr *rtm, struct sockaddr *sa[RTAX_MAX])
316 {
317 char *wp;
318 int rtax;
319
320 wp = (char *)(rtm + 1);
321
322 for (rtax = 0; rtax < RTAX_MAX; rtax++)
323 if (rtm->rtm_addrs & (1 << rtax)) {
324 sa[rtax] = (struct sockaddr *)wp;
325 wp += ROUNDUP(sa[rtax]->sa_len);
326 if (sa[rtax]->sa_family == 0)
327 sa[rtax] = NULL; /* ??? */
328 } else
329 sa[rtax] = NULL;
330 }
331
332 int
route_Show(struct cmdargs const * arg)333 route_Show(struct cmdargs const *arg)
334 {
335 struct rt_msghdr *rtm;
336 struct sockaddr *sa[RTAX_MAX];
337 char *sp, *ep, *cp;
338 size_t needed;
339 int mib[6];
340
341 mib[0] = CTL_NET;
342 mib[1] = PF_ROUTE;
343 mib[2] = 0;
344 mib[3] = 0;
345 mib[4] = NET_RT_DUMP;
346 mib[5] = 0;
347 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
348 log_Printf(LogERROR, "route_Show: sysctl: estimate: %s\n", strerror(errno));
349 return (1);
350 }
351 sp = malloc(needed);
352 if (sp == NULL)
353 return (1);
354 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) {
355 log_Printf(LogERROR, "route_Show: sysctl: getroute: %s\n", strerror(errno));
356 free(sp);
357 return (1);
358 }
359 ep = sp + needed;
360
361 prompt_Printf(arg->prompt, "%-20s%-20sFlags Netif\n",
362 "Destination", "Gateway");
363 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) {
364 rtm = (struct rt_msghdr *)cp;
365
366 route_ParseHdr(rtm, sa);
367
368 if (sa[RTAX_DST] && sa[RTAX_GATEWAY]) {
369 p_sockaddr(arg->prompt, sa[RTAX_DST], sa[RTAX_NETMASK], 20);
370 p_sockaddr(arg->prompt, sa[RTAX_GATEWAY], NULL, 20);
371
372 p_flags(arg->prompt, rtm->rtm_flags, 6);
373 prompt_Printf(arg->prompt, " %s\n", Index2Nam(rtm->rtm_index));
374 } else
375 prompt_Printf(arg->prompt, "<can't parse routing entry>\n");
376 }
377 free(sp);
378 return 0;
379 }
380
381 /*
382 * Delete routes associated with our interface
383 */
384 void
route_IfDelete(struct bundle * bundle,int all)385 route_IfDelete(struct bundle *bundle, int all)
386 {
387 struct rt_msghdr *rtm;
388 struct sockaddr *sa[RTAX_MAX];
389 struct ncprange range;
390 int pass;
391 size_t needed;
392 char *sp, *cp, *ep;
393 int mib[6];
394
395 log_Printf(LogDEBUG, "route_IfDelete (%d)\n", bundle->iface->index);
396
397 mib[0] = CTL_NET;
398 mib[1] = PF_ROUTE;
399 mib[2] = 0;
400 mib[3] = 0;
401 mib[4] = NET_RT_DUMP;
402 mib[5] = 0;
403 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
404 log_Printf(LogERROR, "route_IfDelete: sysctl: estimate: %s\n",
405 strerror(errno));
406 return;
407 }
408
409 sp = malloc(needed);
410 if (sp == NULL)
411 return;
412
413 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) {
414 log_Printf(LogERROR, "route_IfDelete: sysctl: getroute: %s\n",
415 strerror(errno));
416 free(sp);
417 return;
418 }
419 ep = sp + needed;
420
421 for (pass = 0; pass < 2; pass++) {
422 /*
423 * We do 2 passes. The first deletes all cloned routes. The second
424 * deletes all non-cloned routes. This is done to avoid
425 * potential errors from trying to delete route X after route Y where
426 * route X was cloned from route Y (and is no longer there 'cos it
427 * may have gone with route Y).
428 */
429 if (RTF_WASCLONED == 0 && pass == 0)
430 /* So we can't tell ! */
431 continue;
432 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) {
433 rtm = (struct rt_msghdr *)cp;
434 route_ParseHdr(rtm, sa);
435 if (rtm->rtm_index == bundle->iface->index &&
436 sa[RTAX_DST] && sa[RTAX_GATEWAY] &&
437 (sa[RTAX_DST]->sa_family == AF_INET
438 #ifndef NOINET6
439 || sa[RTAX_DST]->sa_family == AF_INET6
440 #endif
441 ) &&
442 (all || (rtm->rtm_flags & RTF_GATEWAY))) {
443 if (log_IsKept(LogDEBUG)) {
444 char gwstr[41];
445 struct ncpaddr gw;
446 ncprange_setsa(&range, sa[RTAX_DST], sa[RTAX_NETMASK]);
447 ncpaddr_setsa(&gw, sa[RTAX_GATEWAY]);
448 snprintf(gwstr, sizeof gwstr, "%s", ncpaddr_ntoa(&gw));
449 log_Printf(LogDEBUG, "Found %s %s\n", ncprange_ntoa(&range), gwstr);
450 }
451 if (sa[RTAX_GATEWAY]->sa_family == AF_INET ||
452 #ifndef NOINET6
453 sa[RTAX_GATEWAY]->sa_family == AF_INET6 ||
454 #endif
455 sa[RTAX_GATEWAY]->sa_family == AF_LINK) {
456 if ((pass == 0 && (rtm->rtm_flags & RTF_WASCLONED)) ||
457 (pass == 1 && !(rtm->rtm_flags & RTF_WASCLONED))) {
458 ncprange_setsa(&range, sa[RTAX_DST], sa[RTAX_NETMASK]);
459 rt_Set(bundle, RTM_DELETE, &range, NULL, 0, 0);
460 } else
461 log_Printf(LogDEBUG, "route_IfDelete: Skip it (pass %d)\n", pass);
462 } else
463 log_Printf(LogDEBUG,
464 "route_IfDelete: Can't remove routes for family %d\n",
465 sa[RTAX_GATEWAY]->sa_family);
466 }
467 }
468 }
469 free(sp);
470 }
471
472
473 /*
474 * Update the MTU on all routes for the given interface
475 */
476 void
route_UpdateMTU(struct bundle * bundle)477 route_UpdateMTU(struct bundle *bundle)
478 {
479 struct rt_msghdr *rtm;
480 struct sockaddr *sa[RTAX_MAX];
481 struct ncprange dst;
482 size_t needed;
483 char *sp, *cp, *ep;
484 int mib[6];
485
486 log_Printf(LogDEBUG, "route_UpdateMTU (%d)\n", bundle->iface->index);
487
488 mib[0] = CTL_NET;
489 mib[1] = PF_ROUTE;
490 mib[2] = 0;
491 mib[3] = 0;
492 mib[4] = NET_RT_DUMP;
493 mib[5] = 0;
494 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) {
495 log_Printf(LogERROR, "route_IfDelete: sysctl: estimate: %s\n",
496 strerror(errno));
497 return;
498 }
499
500 sp = malloc(needed);
501 if (sp == NULL)
502 return;
503
504 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) {
505 log_Printf(LogERROR, "route_IfDelete: sysctl: getroute: %s\n",
506 strerror(errno));
507 free(sp);
508 return;
509 }
510 ep = sp + needed;
511
512 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) {
513 rtm = (struct rt_msghdr *)cp;
514 route_ParseHdr(rtm, sa);
515 if (sa[RTAX_DST] && (sa[RTAX_DST]->sa_family == AF_INET
516 #ifndef NOINET6
517 || sa[RTAX_DST]->sa_family == AF_INET6
518 #endif
519 ) &&
520 sa[RTAX_GATEWAY] && rtm->rtm_index == bundle->iface->index) {
521 if (log_IsKept(LogTCPIP)) {
522 ncprange_setsa(&dst, sa[RTAX_DST], sa[RTAX_NETMASK]);
523 log_Printf(LogTCPIP, "route_UpdateMTU: Netif: %d (%s), dst %s,"
524 " mtu %lu\n", rtm->rtm_index, Index2Nam(rtm->rtm_index),
525 ncprange_ntoa(&dst), bundle->iface->mtu);
526 }
527 rt_Update(bundle, sa[RTAX_DST], sa[RTAX_GATEWAY], sa[RTAX_NETMASK]);
528 }
529 }
530
531 free(sp);
532 }
533
534 int
GetIfIndex(char * name)535 GetIfIndex(char *name)
536 {
537 int idx;
538
539 idx = 1;
540 while (route_nifs == -1 || idx < route_nifs)
541 if (strcmp(Index2Nam(idx), name) == 0)
542 return idx;
543 else
544 idx++;
545 return -1;
546 }
547
548 void
route_Change(struct bundle * bundle,struct sticky_route * r,const struct ncpaddr * me,const struct ncpaddr * peer)549 route_Change(struct bundle *bundle, struct sticky_route *r,
550 const struct ncpaddr *me, const struct ncpaddr *peer)
551 {
552 struct ncpaddr dst;
553
554 for (; r; r = r->next) {
555 ncprange_getaddr(&r->dst, &dst);
556 if (ncpaddr_family(me) == AF_INET) {
557 if ((r->type & ROUTE_DSTMYADDR) && !ncpaddr_equal(&dst, me)) {
558 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
559 ncprange_sethost(&r->dst, me);
560 if (r->type & ROUTE_GWHISADDR)
561 ncpaddr_copy(&r->gw, peer);
562 } else if ((r->type & ROUTE_DSTHISADDR) && !ncpaddr_equal(&dst, peer)) {
563 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
564 ncprange_sethost(&r->dst, peer);
565 if (r->type & ROUTE_GWHISADDR)
566 ncpaddr_copy(&r->gw, peer);
567 } else if ((r->type & ROUTE_DSTDNS0) && !ncpaddr_equal(&dst, peer)) {
568 if (bundle->ncp.ipcp.ns.dns[0].s_addr == INADDR_NONE)
569 continue;
570 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
571 if (r->type & ROUTE_GWHISADDR)
572 ncpaddr_copy(&r->gw, peer);
573 } else if ((r->type & ROUTE_DSTDNS1) && !ncpaddr_equal(&dst, peer)) {
574 if (bundle->ncp.ipcp.ns.dns[1].s_addr == INADDR_NONE)
575 continue;
576 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
577 if (r->type & ROUTE_GWHISADDR)
578 ncpaddr_copy(&r->gw, peer);
579 } else if ((r->type & ROUTE_GWHISADDR) && !ncpaddr_equal(&r->gw, peer))
580 ncpaddr_copy(&r->gw, peer);
581 #ifndef NOINET6
582 } else if (ncpaddr_family(me) == AF_INET6) {
583 if ((r->type & ROUTE_DSTMYADDR6) && !ncpaddr_equal(&dst, me)) {
584 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
585 ncprange_sethost(&r->dst, me);
586 if (r->type & ROUTE_GWHISADDR)
587 ncpaddr_copy(&r->gw, peer);
588 } else if ((r->type & ROUTE_DSTHISADDR6) && !ncpaddr_equal(&dst, peer)) {
589 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0);
590 ncprange_sethost(&r->dst, peer);
591 if (r->type & ROUTE_GWHISADDR)
592 ncpaddr_copy(&r->gw, peer);
593 } else if ((r->type & ROUTE_GWHISADDR6) && !ncpaddr_equal(&r->gw, peer))
594 ncpaddr_copy(&r->gw, peer);
595 #endif
596 }
597 rt_Set(bundle, RTM_ADD, &r->dst, &r->gw, 1, 0);
598 }
599 }
600
601 void
route_Add(struct sticky_route ** rp,int type,const struct ncprange * dst,const struct ncpaddr * gw)602 route_Add(struct sticky_route **rp, int type, const struct ncprange *dst,
603 const struct ncpaddr *gw)
604 {
605 struct sticky_route *r;
606 int dsttype = type & ROUTE_DSTANY;
607
608 r = NULL;
609 while (*rp) {
610 if ((dsttype && dsttype == ((*rp)->type & ROUTE_DSTANY)) ||
611 (!dsttype && ncprange_equal(&(*rp)->dst, dst))) {
612 /* Oops, we already have this route - unlink it */
613 free(r); /* impossible really */
614 r = *rp;
615 *rp = r->next;
616 } else
617 rp = &(*rp)->next;
618 }
619
620 if (r == NULL) {
621 r = (struct sticky_route *)malloc(sizeof(struct sticky_route));
622 if (r == NULL) {
623 log_Printf(LogERROR, "route_Add: Out of memory!\n");
624 return;
625 }
626 }
627 r->type = type;
628 r->next = NULL;
629 ncprange_copy(&r->dst, dst);
630 ncpaddr_copy(&r->gw, gw);
631 *rp = r;
632 }
633
634 void
route_Delete(struct sticky_route ** rp,int type,const struct ncprange * dst)635 route_Delete(struct sticky_route **rp, int type, const struct ncprange *dst)
636 {
637 struct sticky_route *r;
638 int dsttype = type & ROUTE_DSTANY;
639
640 for (; *rp; rp = &(*rp)->next) {
641 if ((dsttype && dsttype == ((*rp)->type & ROUTE_DSTANY)) ||
642 (!dsttype && ncprange_equal(dst, &(*rp)->dst))) {
643 r = *rp;
644 *rp = r->next;
645 free(r);
646 break;
647 }
648 }
649 }
650
651 void
route_DeleteAll(struct sticky_route ** rp)652 route_DeleteAll(struct sticky_route **rp)
653 {
654 struct sticky_route *r, *rn;
655
656 for (r = *rp; r; r = rn) {
657 rn = r->next;
658 free(r);
659 }
660 *rp = NULL;
661 }
662
663 void
route_ShowSticky(struct prompt * p,struct sticky_route * r,const char * tag,int indent)664 route_ShowSticky(struct prompt *p, struct sticky_route *r, const char *tag,
665 int indent)
666 {
667 int tlen = strlen(tag);
668
669 if (tlen + 2 > indent)
670 prompt_Printf(p, "%s:\n%*s", tag, indent, "");
671 else
672 prompt_Printf(p, "%s:%*s", tag, indent - tlen - 1, "");
673
674 for (; r; r = r->next) {
675 prompt_Printf(p, "%*sadd ", tlen ? 0 : indent, "");
676 tlen = 0;
677 if (r->type & ROUTE_DSTMYADDR)
678 prompt_Printf(p, "MYADDR");
679 else if (r->type & ROUTE_DSTMYADDR6)
680 prompt_Printf(p, "MYADDR6");
681 else if (r->type & ROUTE_DSTHISADDR)
682 prompt_Printf(p, "HISADDR");
683 else if (r->type & ROUTE_DSTHISADDR6)
684 prompt_Printf(p, "HISADDR6");
685 else if (r->type & ROUTE_DSTDNS0)
686 prompt_Printf(p, "DNS0");
687 else if (r->type & ROUTE_DSTDNS1)
688 prompt_Printf(p, "DNS1");
689 else if (ncprange_isdefault(&r->dst))
690 prompt_Printf(p, "default");
691 else
692 prompt_Printf(p, "%s", ncprange_ntoa(&r->dst));
693
694 if (r->type & ROUTE_GWHISADDR)
695 prompt_Printf(p, " HISADDR\n");
696 else if (r->type & ROUTE_GWHISADDR6)
697 prompt_Printf(p, " HISADDR6\n");
698 else
699 prompt_Printf(p, " %s\n", ncpaddr_ntoa(&r->gw));
700 }
701 }
702
703 struct rtmsg {
704 struct rt_msghdr m_rtm;
705 char m_space[256];
706 };
707
708 static size_t
memcpy_roundup(char * cp,const void * data,size_t len)709 memcpy_roundup(char *cp, const void *data, size_t len)
710 {
711 size_t padlen;
712
713 padlen = ROUNDUP(len);
714 memcpy(cp, data, len);
715 if (padlen > len)
716 memset(cp + len, '\0', padlen - len);
717
718 return padlen;
719 }
720
721 #if defined(__KAME__) && !defined(NOINET6)
722 static void
add_scope(struct sockaddr * sa,int ifindex)723 add_scope(struct sockaddr *sa, int ifindex)
724 {
725 struct sockaddr_in6 *sa6;
726
727 if (sa->sa_family != AF_INET6)
728 return;
729 sa6 = (struct sockaddr_in6 *)sa;
730 if (!IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr) &&
731 !IN6_IS_ADDR_MC_LINKLOCAL(&sa6->sin6_addr))
732 return;
733 if (*(u_int16_t *)&sa6->sin6_addr.s6_addr[2] != 0)
734 return;
735 *(u_int16_t *)&sa6->sin6_addr.s6_addr[2] = htons(ifindex);
736 }
737 #endif
738
739 int
rt_Set(struct bundle * bundle,int cmd,const struct ncprange * dst,const struct ncpaddr * gw,int bang,int quiet)740 rt_Set(struct bundle *bundle, int cmd, const struct ncprange *dst,
741 const struct ncpaddr *gw, int bang, int quiet)
742 {
743 struct rtmsg rtmes;
744 int s, nb, wb;
745 char *cp;
746 const char *cmdstr;
747 struct sockaddr_storage sadst, samask, sagw;
748 int result = 1;
749
750 if (bang)
751 cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!");
752 else
753 cmdstr = (cmd == RTM_ADD ? "Add" : "Delete");
754 s = ID0socket(PF_ROUTE, SOCK_RAW, 0);
755 if (s < 0) {
756 log_Printf(LogERROR, "rt_Set: socket(): %s\n", strerror(errno));
757 return result;
758 }
759 memset(&rtmes, '\0', sizeof rtmes);
760 rtmes.m_rtm.rtm_version = RTM_VERSION;
761 rtmes.m_rtm.rtm_type = cmd;
762 rtmes.m_rtm.rtm_addrs = RTA_DST;
763 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq;
764 rtmes.m_rtm.rtm_pid = getpid();
765 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC;
766
767 if (cmd == RTM_ADD) {
768 if (bundle->ncp.cfg.sendpipe > 0) {
769 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.cfg.sendpipe;
770 rtmes.m_rtm.rtm_inits |= RTV_SPIPE;
771 }
772 if (bundle->ncp.cfg.recvpipe > 0) {
773 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.cfg.recvpipe;
774 rtmes.m_rtm.rtm_inits |= RTV_RPIPE;
775 }
776 }
777
778 ncprange_getsa(dst, &sadst, &samask);
779 #if defined(__KAME__) && !defined(NOINET6)
780 add_scope((struct sockaddr *)&sadst, bundle->iface->index);
781 #endif
782
783 cp = rtmes.m_space;
784 cp += memcpy_roundup(cp, &sadst, sadst.ss_len);
785 if (cmd == RTM_ADD) {
786 if (gw == NULL) {
787 log_Printf(LogERROR, "rt_Set: Program error\n");
788 close(s);
789 return result;
790 }
791 ncpaddr_getsa(gw, &sagw);
792 #if defined(__KAME__) && !defined(NOINET6)
793 add_scope((struct sockaddr *)&sagw, bundle->iface->index);
794 #endif
795 if (ncpaddr_isdefault(gw)) {
796 if (!quiet)
797 log_Printf(LogERROR, "rt_Set: Cannot add a route with"
798 " gateway 0.0.0.0\n");
799 close(s);
800 return result;
801 } else {
802 cp += memcpy_roundup(cp, &sagw, sagw.ss_len);
803 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY;
804 }
805 }
806
807 if (!ncprange_ishost(dst)) {
808 cp += memcpy_roundup(cp, &samask, samask.ss_len);
809 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK;
810 }
811
812 nb = cp - (char *)&rtmes;
813 rtmes.m_rtm.rtm_msglen = nb;
814 wb = ID0write(s, &rtmes, nb);
815 if (wb < 0) {
816 log_Printf(LogTCPIP, "rt_Set failure:\n");
817 log_Printf(LogTCPIP, "rt_Set: Cmd = %s\n", cmdstr);
818 log_Printf(LogTCPIP, "rt_Set: Dst = %s\n", ncprange_ntoa(dst));
819 if (gw != NULL)
820 log_Printf(LogTCPIP, "rt_Set: Gateway = %s\n", ncpaddr_ntoa(gw));
821 failed:
822 if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST ||
823 (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) {
824 if (!bang) {
825 log_Printf(LogWARN, "Add route failed: %s already exists\n",
826 ncprange_ntoa(dst));
827 result = 0; /* Don't add to our dynamic list */
828 } else {
829 rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE;
830 if ((wb = ID0write(s, &rtmes, nb)) < 0)
831 goto failed;
832 }
833 } else if (cmd == RTM_DELETE &&
834 (rtmes.m_rtm.rtm_errno == ESRCH ||
835 (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) {
836 if (!bang)
837 log_Printf(LogWARN, "Del route failed: %s: Non-existent\n",
838 ncprange_ntoa(dst));
839 } else if (rtmes.m_rtm.rtm_errno == 0) {
840 if (!quiet || errno != ENETUNREACH)
841 log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr,
842 ncprange_ntoa(dst), strerror(errno));
843 } else
844 log_Printf(LogWARN, "%s route failed: %s: %s\n",
845 cmdstr, ncprange_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno));
846 }
847
848 if (log_IsKept(LogDEBUG)) {
849 char gwstr[40];
850
851 if (gw)
852 snprintf(gwstr, sizeof gwstr, "%s", ncpaddr_ntoa(gw));
853 else
854 snprintf(gwstr, sizeof gwstr, "<none>");
855 log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %s, gateway = %s\n",
856 wb, cmdstr, ncprange_ntoa(dst), gwstr);
857 }
858 close(s);
859
860 return result;
861 }
862
863 void
rt_Update(struct bundle * bundle,const struct sockaddr * dst,const struct sockaddr * gw,const struct sockaddr * mask)864 rt_Update(struct bundle *bundle, const struct sockaddr *dst,
865 const struct sockaddr *gw, const struct sockaddr *mask)
866 {
867 struct ncprange ncpdst;
868 struct rtmsg rtmes;
869 char *p;
870 int s, wb;
871
872 s = ID0socket(PF_ROUTE, SOCK_RAW, 0);
873 if (s < 0) {
874 log_Printf(LogERROR, "rt_Update: socket(): %s\n", strerror(errno));
875 return;
876 }
877
878 memset(&rtmes, '\0', sizeof rtmes);
879 rtmes.m_rtm.rtm_version = RTM_VERSION;
880 rtmes.m_rtm.rtm_type = RTM_CHANGE;
881 rtmes.m_rtm.rtm_addrs = 0;
882 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq;
883 rtmes.m_rtm.rtm_pid = getpid();
884 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_STATIC;
885
886 if (bundle->ncp.cfg.sendpipe > 0) {
887 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.cfg.sendpipe;
888 rtmes.m_rtm.rtm_inits |= RTV_SPIPE;
889 }
890
891 if (bundle->ncp.cfg.recvpipe > 0) {
892 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.cfg.recvpipe;
893 rtmes.m_rtm.rtm_inits |= RTV_RPIPE;
894 }
895
896 rtmes.m_rtm.rtm_rmx.rmx_mtu = bundle->iface->mtu;
897 rtmes.m_rtm.rtm_inits |= RTV_MTU;
898 p = rtmes.m_space;
899
900 if (dst) {
901 rtmes.m_rtm.rtm_addrs |= RTA_DST;
902 p += memcpy_roundup(p, dst, dst->sa_len);
903 }
904
905 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY;
906 p += memcpy_roundup(p, gw, gw->sa_len);
907 if (mask) {
908 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK;
909 p += memcpy_roundup(p, mask, mask->sa_len);
910 }
911
912 rtmes.m_rtm.rtm_msglen = p - (char *)&rtmes;
913
914 wb = ID0write(s, &rtmes, rtmes.m_rtm.rtm_msglen);
915 if (wb < 0) {
916 ncprange_setsa(&ncpdst, dst, mask);
917
918 log_Printf(LogTCPIP, "rt_Update failure:\n");
919 log_Printf(LogTCPIP, "rt_Update: Dst = %s\n", ncprange_ntoa(&ncpdst));
920
921 if (rtmes.m_rtm.rtm_errno == 0)
922 log_Printf(LogWARN, "%s: Change route failed: errno: %s\n",
923 ncprange_ntoa(&ncpdst), strerror(errno));
924 else
925 log_Printf(LogWARN, "%s: Change route failed: %s\n",
926 ncprange_ntoa(&ncpdst), strerror(rtmes.m_rtm.rtm_errno));
927 }
928 close(s);
929 }
930