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  * $FreeBSD$
  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
  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
 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 *
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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 }