usr.sbin/ppp/route.c

   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
  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
 188 p_flags(struct prompt *prompt, u_int32_t f, int 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 < 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 *
 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
 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 += 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
 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
 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
 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 %d\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
 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
 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
 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
 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
 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
 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
 700 memcpy_roundup(char *cp, const void *data, size_t len)
 701 {
 702   size_t padlen;
 703
 704   padlen = 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
 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
 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
 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 }