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 #include <netdb.h> 43 44 #include <errno.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 "ip.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 register 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 const char * 204 Index2Nam(int idx) 205 { 206 /* 207 * XXX: Maybe we should select() on the routing socket so that we can 208 * notice interfaces that come & go (PCCARD support). 209 * Or we could even support a signal that resets these so that 210 * the PCCARD insert/remove events can signal ppp. 211 */ 212 static char **ifs; /* Figure these out once */ 213 static int nifs, debug_done; /* Figure out how many once, and debug once */ 214 215 if (idx > nifs || (idx > 0 && ifs[idx-1] == NULL)) { 216 int mib[6], have, had; 217 size_t needed; 218 char *buf, *ptr, *end; 219 struct sockaddr_dl *dl; 220 struct if_msghdr *ifm; 221 222 if (ifs) { 223 free(ifs); 224 ifs = NULL; 225 nifs = 0; 226 } 227 debug_done = 0; 228 229 mib[0] = CTL_NET; 230 mib[1] = PF_ROUTE; 231 mib[2] = 0; 232 mib[3] = 0; 233 mib[4] = NET_RT_IFLIST; 234 mib[5] = 0; 235 236 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 237 log_Printf(LogERROR, "Index2Nam: sysctl: estimate: %s\n", 238 strerror(errno)); 239 return NumStr(idx, NULL, 0); 240 } 241 if ((buf = malloc(needed)) == NULL) 242 return NumStr(idx, NULL, 0); 243 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 244 free(buf); 245 return NumStr(idx, NULL, 0); 246 } 247 end = buf + needed; 248 249 have = 0; 250 for (ptr = buf; ptr < end; ptr += ifm->ifm_msglen) { 251 ifm = (struct if_msghdr *)ptr; 252 if (ifm->ifm_type != RTM_IFINFO) 253 continue; 254 dl = (struct sockaddr_dl *)(ifm + 1); 255 if (ifm->ifm_index > 0) { 256 if (ifm->ifm_index > have) { 257 char **newifs; 258 259 had = have; 260 have = ifm->ifm_index + 5; 261 if (had) 262 newifs = (char **)realloc(ifs, sizeof(char *) * have); 263 else 264 newifs = (char **)malloc(sizeof(char *) * have); 265 if (!newifs) { 266 log_Printf(LogDEBUG, "Index2Nam: %s\n", strerror(errno)); 267 nifs = 0; 268 if (ifs) { 269 free(ifs); 270 ifs = NULL; 271 } 272 free(buf); 273 return NumStr(idx, NULL, 0); 274 } 275 ifs = newifs; 276 memset(ifs + had, '\0', sizeof(char *) * (have - had)); 277 } 278 if (ifs[ifm->ifm_index-1] == NULL) { 279 ifs[ifm->ifm_index-1] = (char *)malloc(dl->sdl_nlen+1); 280 memcpy(ifs[ifm->ifm_index-1], dl->sdl_data, dl->sdl_nlen); 281 ifs[ifm->ifm_index-1][dl->sdl_nlen] = '\0'; 282 if (nifs < ifm->ifm_index) 283 nifs = ifm->ifm_index; 284 } 285 } else if (log_IsKept(LogDEBUG)) 286 log_Printf(LogDEBUG, "Skipping out-of-range interface %d!\n", 287 ifm->ifm_index); 288 } 289 free(buf); 290 } 291 292 if (log_IsKept(LogDEBUG) && !debug_done) { 293 int f; 294 295 log_Printf(LogDEBUG, "Found the following interfaces:\n"); 296 for (f = 0; f < nifs; f++) 297 if (ifs[f] != NULL) 298 log_Printf(LogDEBUG, " Index %d, name \"%s\"\n", f+1, ifs[f]); 299 debug_done = 1; 300 } 301 302 if (idx < 1 || idx > nifs || ifs[idx-1] == NULL) 303 return NumStr(idx, NULL, 0); 304 305 return ifs[idx-1]; 306 } 307 308 void 309 route_ParseHdr(struct rt_msghdr *rtm, struct sockaddr *sa[RTAX_MAX]) 310 { 311 char *wp; 312 int rtax; 313 314 wp = (char *)(rtm + 1); 315 316 for (rtax = 0; rtax < RTAX_MAX; rtax++) 317 if (rtm->rtm_addrs & (1 << rtax)) { 318 sa[rtax] = (struct sockaddr *)wp; 319 wp += ROUNDUP(sa[rtax]->sa_len); 320 if (sa[rtax]->sa_family == 0) 321 sa[rtax] = NULL; /* ??? */ 322 } else 323 sa[rtax] = NULL; 324 } 325 326 int 327 route_Show(struct cmdargs const *arg) 328 { 329 struct rt_msghdr *rtm; 330 struct sockaddr *sa[RTAX_MAX]; 331 char *sp, *ep, *cp; 332 size_t needed; 333 int mib[6]; 334 335 mib[0] = CTL_NET; 336 mib[1] = PF_ROUTE; 337 mib[2] = 0; 338 mib[3] = 0; 339 mib[4] = NET_RT_DUMP; 340 mib[5] = 0; 341 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 342 log_Printf(LogERROR, "route_Show: sysctl: estimate: %s\n", strerror(errno)); 343 return (1); 344 } 345 sp = malloc(needed); 346 if (sp == NULL) 347 return (1); 348 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) { 349 log_Printf(LogERROR, "route_Show: sysctl: getroute: %s\n", strerror(errno)); 350 free(sp); 351 return (1); 352 } 353 ep = sp + needed; 354 355 prompt_Printf(arg->prompt, "%-20s%-20sFlags Netif\n", 356 "Destination", "Gateway"); 357 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) { 358 rtm = (struct rt_msghdr *)cp; 359 360 route_ParseHdr(rtm, sa); 361 362 if (sa[RTAX_DST] && sa[RTAX_GATEWAY]) { 363 p_sockaddr(arg->prompt, sa[RTAX_DST], sa[RTAX_NETMASK], 20); 364 p_sockaddr(arg->prompt, sa[RTAX_GATEWAY], NULL, 20); 365 366 p_flags(arg->prompt, rtm->rtm_flags, 6); 367 prompt_Printf(arg->prompt, " %s\n", Index2Nam(rtm->rtm_index)); 368 } else 369 prompt_Printf(arg->prompt, "<can't parse routing entry>\n"); 370 } 371 free(sp); 372 return 0; 373 } 374 375 /* 376 * Delete routes associated with our interface 377 */ 378 void 379 route_IfDelete(struct bundle *bundle, int all) 380 { 381 struct rt_msghdr *rtm; 382 struct sockaddr *sa[RTAX_MAX]; 383 struct ncprange range; 384 int pass; 385 size_t needed; 386 char *sp, *cp, *ep; 387 int mib[6]; 388 389 log_Printf(LogDEBUG, "route_IfDelete (%d)\n", bundle->iface->index); 390 391 mib[0] = CTL_NET; 392 mib[1] = PF_ROUTE; 393 mib[2] = 0; 394 mib[3] = 0; 395 mib[4] = NET_RT_DUMP; 396 mib[5] = 0; 397 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 398 log_Printf(LogERROR, "route_IfDelete: sysctl: estimate: %s\n", 399 strerror(errno)); 400 return; 401 } 402 403 sp = malloc(needed); 404 if (sp == NULL) 405 return; 406 407 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) { 408 log_Printf(LogERROR, "route_IfDelete: sysctl: getroute: %s\n", 409 strerror(errno)); 410 free(sp); 411 return; 412 } 413 ep = sp + needed; 414 415 for (pass = 0; pass < 2; pass++) { 416 /* 417 * We do 2 passes. The first deletes all cloned routes. The second 418 * deletes all non-cloned routes. This is done to avoid 419 * potential errors from trying to delete route X after route Y where 420 * route X was cloned from route Y (and is no longer there 'cos it 421 * may have gone with route Y). 422 */ 423 if (RTF_WASCLONED == 0 && pass == 0) 424 /* So we can't tell ! */ 425 continue; 426 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) { 427 rtm = (struct rt_msghdr *)cp; 428 route_ParseHdr(rtm, sa); 429 if (rtm->rtm_index == bundle->iface->index && 430 sa[RTAX_DST] && sa[RTAX_GATEWAY] && 431 (sa[RTAX_DST]->sa_family == AF_INET 432 #ifndef NOINET6 433 || sa[RTAX_DST]->sa_family == AF_INET6 434 #endif 435 ) && 436 (all || (rtm->rtm_flags & RTF_GATEWAY))) { 437 if (log_IsKept(LogDEBUG)) { 438 char gwstr[41]; 439 struct ncpaddr gw; 440 ncprange_setsa(&range, sa[RTAX_DST], sa[RTAX_NETMASK]); 441 ncpaddr_setsa(&gw, sa[RTAX_GATEWAY]); 442 snprintf(gwstr, sizeof gwstr, "%s", ncpaddr_ntoa(&gw)); 443 log_Printf(LogDEBUG, "Found %s %s\n", ncprange_ntoa(&range), gwstr); 444 } 445 if (sa[RTAX_GATEWAY]->sa_family == AF_INET || 446 #ifndef NOINET6 447 sa[RTAX_GATEWAY]->sa_family == AF_INET6 || 448 #endif 449 sa[RTAX_GATEWAY]->sa_family == AF_LINK) { 450 if ((pass == 0 && (rtm->rtm_flags & RTF_WASCLONED)) || 451 (pass == 1 && !(rtm->rtm_flags & RTF_WASCLONED))) { 452 ncprange_setsa(&range, sa[RTAX_DST], sa[RTAX_NETMASK]); 453 rt_Set(bundle, RTM_DELETE, &range, NULL, 0, 0); 454 } else 455 log_Printf(LogDEBUG, "route_IfDelete: Skip it (pass %d)\n", pass); 456 } else 457 log_Printf(LogDEBUG, 458 "route_IfDelete: Can't remove routes for family %d\n", 459 sa[RTAX_GATEWAY]->sa_family); 460 } 461 } 462 } 463 free(sp); 464 } 465 466 467 /* 468 * Update the MTU on all routes for the given interface 469 */ 470 void 471 route_UpdateMTU(struct bundle *bundle) 472 { 473 struct rt_msghdr *rtm; 474 struct sockaddr *sa[RTAX_MAX]; 475 struct ncprange dst; 476 size_t needed; 477 char *sp, *cp, *ep; 478 int mib[6]; 479 480 log_Printf(LogDEBUG, "route_UpdateMTU (%d)\n", bundle->iface->index); 481 482 mib[0] = CTL_NET; 483 mib[1] = PF_ROUTE; 484 mib[2] = 0; 485 mib[3] = 0; 486 mib[4] = NET_RT_DUMP; 487 mib[5] = 0; 488 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 489 log_Printf(LogERROR, "route_IfDelete: sysctl: estimate: %s\n", 490 strerror(errno)); 491 return; 492 } 493 494 sp = malloc(needed); 495 if (sp == NULL) 496 return; 497 498 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) { 499 log_Printf(LogERROR, "route_IfDelete: sysctl: getroute: %s\n", 500 strerror(errno)); 501 free(sp); 502 return; 503 } 504 ep = sp + needed; 505 506 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) { 507 rtm = (struct rt_msghdr *)cp; 508 route_ParseHdr(rtm, sa); 509 if (sa[RTAX_DST] && (sa[RTAX_DST]->sa_family == AF_INET 510 #ifndef NOINET6 511 || sa[RTAX_DST]->sa_family == AF_INET6 512 #endif 513 ) && 514 sa[RTAX_GATEWAY] && rtm->rtm_index == bundle->iface->index) { 515 if (log_IsKept(LogTCPIP)) { 516 ncprange_setsa(&dst, sa[RTAX_DST], sa[RTAX_NETMASK]); 517 log_Printf(LogTCPIP, "route_UpdateMTU: Netif: %d (%s), dst %s," 518 " mtu %d\n", rtm->rtm_index, Index2Nam(rtm->rtm_index), 519 ncprange_ntoa(&dst), bundle->iface->mtu); 520 } 521 rt_Update(bundle, sa[RTAX_DST], sa[RTAX_GATEWAY], sa[RTAX_NETMASK]); 522 } 523 } 524 525 free(sp); 526 } 527 528 int 529 GetIfIndex(char *name) 530 { 531 int idx; 532 const char *got; 533 534 idx = 1; 535 while (strcmp(got = Index2Nam(idx), "???")) 536 if (!strcmp(got, name)) 537 return idx; 538 else 539 idx++; 540 return -1; 541 } 542 543 void 544 route_Change(struct bundle *bundle, struct sticky_route *r, 545 const struct ncpaddr *me, const struct ncpaddr *peer) 546 { 547 struct ncpaddr dst; 548 549 for (; r; r = r->next) { 550 ncprange_getaddr(&r->dst, &dst); 551 if (ncpaddr_family(me) == AF_INET) { 552 if ((r->type & ROUTE_DSTMYADDR) && !ncpaddr_equal(&dst, me)) { 553 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0); 554 ncprange_sethost(&r->dst, me); 555 if (r->type & ROUTE_GWHISADDR) 556 ncpaddr_copy(&r->gw, peer); 557 } else if ((r->type & ROUTE_DSTHISADDR) && !ncpaddr_equal(&dst, peer)) { 558 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0); 559 ncprange_sethost(&r->dst, peer); 560 if (r->type & ROUTE_GWHISADDR) 561 ncpaddr_copy(&r->gw, peer); 562 } else if ((r->type & ROUTE_DSTDNS0) && !ncpaddr_equal(&dst, peer)) { 563 if (bundle->ncp.ipcp.ns.dns[0].s_addr == INADDR_NONE) 564 continue; 565 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0); 566 if (r->type & ROUTE_GWHISADDR) 567 ncpaddr_copy(&r->gw, peer); 568 } else if ((r->type & ROUTE_DSTDNS1) && !ncpaddr_equal(&dst, peer)) { 569 if (bundle->ncp.ipcp.ns.dns[1].s_addr == INADDR_NONE) 570 continue; 571 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0); 572 if (r->type & ROUTE_GWHISADDR) 573 ncpaddr_copy(&r->gw, peer); 574 } else if ((r->type & ROUTE_GWHISADDR) && !ncpaddr_equal(&r->gw, peer)) 575 ncpaddr_copy(&r->gw, peer); 576 #ifndef NOINET6 577 } else if (ncpaddr_family(me) == AF_INET6) { 578 if ((r->type & ROUTE_DSTMYADDR6) && !ncpaddr_equal(&dst, me)) { 579 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0); 580 ncprange_sethost(&r->dst, me); 581 if (r->type & ROUTE_GWHISADDR) 582 ncpaddr_copy(&r->gw, peer); 583 } else if ((r->type & ROUTE_DSTHISADDR6) && !ncpaddr_equal(&dst, peer)) { 584 rt_Set(bundle, RTM_DELETE, &r->dst, NULL, 1, 0); 585 ncprange_sethost(&r->dst, peer); 586 if (r->type & ROUTE_GWHISADDR) 587 ncpaddr_copy(&r->gw, peer); 588 } else if ((r->type & ROUTE_GWHISADDR6) && !ncpaddr_equal(&r->gw, peer)) 589 ncpaddr_copy(&r->gw, peer); 590 #endif 591 } 592 rt_Set(bundle, RTM_ADD, &r->dst, &r->gw, 1, 0); 593 } 594 } 595 596 void 597 route_Add(struct sticky_route **rp, int type, const struct ncprange *dst, 598 const struct ncpaddr *gw) 599 { 600 struct sticky_route *r; 601 int dsttype = type & ROUTE_DSTANY; 602 603 r = NULL; 604 while (*rp) { 605 if ((dsttype && dsttype == ((*rp)->type & ROUTE_DSTANY)) || 606 (!dsttype && ncprange_equal(&(*rp)->dst, dst))) { 607 /* Oops, we already have this route - unlink it */ 608 free(r); /* impossible really */ 609 r = *rp; 610 *rp = r->next; 611 } else 612 rp = &(*rp)->next; 613 } 614 615 if (!r) 616 r = (struct sticky_route *)malloc(sizeof(struct sticky_route)); 617 r->type = type; 618 r->next = NULL; 619 ncprange_copy(&r->dst, dst); 620 ncpaddr_copy(&r->gw, gw); 621 *rp = r; 622 } 623 624 void 625 route_Delete(struct sticky_route **rp, int type, const struct ncprange *dst) 626 { 627 struct sticky_route *r; 628 int dsttype = type & ROUTE_DSTANY; 629 630 for (; *rp; rp = &(*rp)->next) { 631 if ((dsttype && dsttype == ((*rp)->type & ROUTE_DSTANY)) || 632 (!dsttype && ncprange_equal(dst, &(*rp)->dst))) { 633 r = *rp; 634 *rp = r->next; 635 free(r); 636 break; 637 } 638 } 639 } 640 641 void 642 route_DeleteAll(struct sticky_route **rp) 643 { 644 struct sticky_route *r, *rn; 645 646 for (r = *rp; r; r = rn) { 647 rn = r->next; 648 free(r); 649 } 650 *rp = NULL; 651 } 652 653 void 654 route_ShowSticky(struct prompt *p, struct sticky_route *r, const char *tag, 655 int indent) 656 { 657 int tlen = strlen(tag); 658 659 if (tlen + 2 > indent) 660 prompt_Printf(p, "%s:\n%*s", tag, indent, ""); 661 else 662 prompt_Printf(p, "%s:%*s", tag, indent - tlen - 1, ""); 663 664 for (; r; r = r->next) { 665 prompt_Printf(p, "%*sadd ", tlen ? 0 : indent, ""); 666 tlen = 0; 667 if (r->type & ROUTE_DSTMYADDR) 668 prompt_Printf(p, "MYADDR"); 669 else if (r->type & ROUTE_DSTMYADDR6) 670 prompt_Printf(p, "MYADDR6"); 671 else if (r->type & ROUTE_DSTHISADDR) 672 prompt_Printf(p, "HISADDR"); 673 else if (r->type & ROUTE_DSTHISADDR6) 674 prompt_Printf(p, "HISADDR6"); 675 else if (r->type & ROUTE_DSTDNS0) 676 prompt_Printf(p, "DNS0"); 677 else if (r->type & ROUTE_DSTDNS1) 678 prompt_Printf(p, "DNS1"); 679 else if (ncprange_isdefault(&r->dst)) 680 prompt_Printf(p, "default"); 681 else 682 prompt_Printf(p, "%s", ncprange_ntoa(&r->dst)); 683 684 if (r->type & ROUTE_GWHISADDR) 685 prompt_Printf(p, " HISADDR\n"); 686 else if (r->type & ROUTE_GWHISADDR6) 687 prompt_Printf(p, " HISADDR6\n"); 688 else 689 prompt_Printf(p, " %s\n", ncpaddr_ntoa(&r->gw)); 690 } 691 } 692 693 struct rtmsg { 694 struct rt_msghdr m_rtm; 695 char m_space[256]; 696 }; 697 698 static size_t 699 memcpy_roundup(char *cp, const void *data, size_t len) 700 { 701 size_t padlen; 702 703 padlen = ROUNDUP(len); 704 memcpy(cp, data, len); 705 if (padlen > len) 706 memset(cp + len, '\0', padlen - len); 707 708 return padlen; 709 } 710 711 int 712 rt_Set(struct bundle *bundle, int cmd, const struct ncprange *dst, 713 const struct ncpaddr *gw, int bang, int quiet) 714 { 715 struct rtmsg rtmes; 716 int s, nb, wb; 717 char *cp; 718 const char *cmdstr; 719 struct sockaddr_storage sadst, samask, sagw; 720 int result = 1; 721 722 if (bang) 723 cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!"); 724 else 725 cmdstr = (cmd == RTM_ADD ? "Add" : "Delete"); 726 s = ID0socket(PF_ROUTE, SOCK_RAW, 0); 727 if (s < 0) { 728 log_Printf(LogERROR, "rt_Set: socket(): %s\n", strerror(errno)); 729 return result; 730 } 731 memset(&rtmes, '\0', sizeof rtmes); 732 rtmes.m_rtm.rtm_version = RTM_VERSION; 733 rtmes.m_rtm.rtm_type = cmd; 734 rtmes.m_rtm.rtm_addrs = RTA_DST; 735 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; 736 rtmes.m_rtm.rtm_pid = getpid(); 737 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; 738 739 if (cmd == RTM_ADD) { 740 if (bundle->ncp.cfg.sendpipe > 0) { 741 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.cfg.sendpipe; 742 rtmes.m_rtm.rtm_inits |= RTV_SPIPE; 743 } 744 if (bundle->ncp.cfg.recvpipe > 0) { 745 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.cfg.recvpipe; 746 rtmes.m_rtm.rtm_inits |= RTV_RPIPE; 747 } 748 } 749 750 ncprange_getsa(dst, &sadst, &samask); 751 752 cp = rtmes.m_space; 753 cp += memcpy_roundup(cp, &sadst, sadst.ss_len); 754 if (cmd == RTM_ADD) { 755 if (gw == NULL) { 756 log_Printf(LogERROR, "rt_Set: Program error\n"); 757 close(s); 758 return result; 759 } 760 ncpaddr_getsa(gw, &sagw); 761 if (ncpaddr_isdefault(gw)) { 762 if (!quiet) 763 log_Printf(LogERROR, "rt_Set: Cannot add a route with" 764 " gateway 0.0.0.0\n"); 765 close(s); 766 return result; 767 } else { 768 cp += memcpy_roundup(cp, &sagw, sagw.ss_len); 769 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; 770 } 771 } 772 773 if (!ncprange_ishost(dst)) { 774 cp += memcpy_roundup(cp, &samask, samask.ss_len); 775 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; 776 } 777 778 nb = cp - (char *)&rtmes; 779 rtmes.m_rtm.rtm_msglen = nb; 780 wb = ID0write(s, &rtmes, nb); 781 if (wb < 0) { 782 log_Printf(LogTCPIP, "rt_Set failure:\n"); 783 log_Printf(LogTCPIP, "rt_Set: Cmd = %s\n", cmdstr); 784 log_Printf(LogTCPIP, "rt_Set: Dst = %s\n", ncprange_ntoa(dst)); 785 if (gw != NULL) 786 log_Printf(LogTCPIP, "rt_Set: Gateway = %s\n", ncpaddr_ntoa(gw)); 787 failed: 788 if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST || 789 (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) { 790 if (!bang) { 791 log_Printf(LogWARN, "Add route failed: %s already exists\n", 792 ncprange_ntoa(dst)); 793 result = 0; /* Don't add to our dynamic list */ 794 } else { 795 rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE; 796 if ((wb = ID0write(s, &rtmes, nb)) < 0) 797 goto failed; 798 } 799 } else if (cmd == RTM_DELETE && 800 (rtmes.m_rtm.rtm_errno == ESRCH || 801 (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) { 802 if (!bang) 803 log_Printf(LogWARN, "Del route failed: %s: Non-existent\n", 804 ncprange_ntoa(dst)); 805 } else if (rtmes.m_rtm.rtm_errno == 0) { 806 if (!quiet || errno != ENETUNREACH) 807 log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr, 808 ncprange_ntoa(dst), strerror(errno)); 809 } else 810 log_Printf(LogWARN, "%s route failed: %s: %s\n", 811 cmdstr, ncprange_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno)); 812 } 813 814 if (log_IsKept(LogDEBUG)) { 815 char gwstr[40]; 816 817 if (gw) 818 snprintf(gwstr, sizeof gwstr, "%s", ncpaddr_ntoa(gw)); 819 else 820 snprintf(gwstr, sizeof gwstr, "<none>"); 821 log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %s, gateway = %s\n", 822 wb, cmdstr, ncprange_ntoa(dst), gwstr); 823 } 824 close(s); 825 826 return result; 827 } 828 829 void 830 rt_Update(struct bundle *bundle, const struct sockaddr *dst, 831 const struct sockaddr *gw, const struct sockaddr *mask) 832 { 833 struct ncprange ncpdst; 834 struct rtmsg rtmes; 835 char *p; 836 int s, wb; 837 838 s = ID0socket(PF_ROUTE, SOCK_RAW, 0); 839 if (s < 0) { 840 log_Printf(LogERROR, "rt_Update: socket(): %s\n", strerror(errno)); 841 return; 842 } 843 844 memset(&rtmes, '\0', sizeof rtmes); 845 rtmes.m_rtm.rtm_version = RTM_VERSION; 846 rtmes.m_rtm.rtm_type = RTM_CHANGE; 847 rtmes.m_rtm.rtm_addrs = 0; 848 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; 849 rtmes.m_rtm.rtm_pid = getpid(); 850 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; 851 852 if (bundle->ncp.cfg.sendpipe > 0) { 853 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.cfg.sendpipe; 854 rtmes.m_rtm.rtm_inits |= RTV_SPIPE; 855 } 856 857 if (bundle->ncp.cfg.recvpipe > 0) { 858 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.cfg.recvpipe; 859 rtmes.m_rtm.rtm_inits |= RTV_RPIPE; 860 } 861 862 rtmes.m_rtm.rtm_rmx.rmx_mtu = bundle->iface->mtu; 863 rtmes.m_rtm.rtm_inits |= RTV_MTU; 864 p = rtmes.m_space; 865 866 if (dst) { 867 rtmes.m_rtm.rtm_addrs |= RTA_DST; 868 p += memcpy_roundup(p, dst, dst->sa_len); 869 } 870 871 rtmes.m_rtm.rtm_msglen = p - (char *)&rtmes; 872 873 wb = ID0write(s, &rtmes, rtmes.m_rtm.rtm_msglen); 874 if (wb < 0) { 875 ncprange_setsa(&ncpdst, dst, mask); 876 877 log_Printf(LogTCPIP, "rt_Update failure:\n"); 878 log_Printf(LogTCPIP, "rt_Update: Dst = %s\n", ncprange_ntoa(&ncpdst)); 879 880 if (rtmes.m_rtm.rtm_errno == 0) 881 log_Printf(LogWARN, "%s: Change route failed: errno: %s\n", 882 ncprange_ntoa(&ncpdst), strerror(errno)); 883 else 884 log_Printf(LogWARN, "%s: Change route failed: %s\n", 885 ncprange_ntoa(&ncpdst), strerror(rtmes.m_rtm.rtm_errno)); 886 } 887 close(s); 888 } 889