1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org> 5 * based on work by Toshiharu OHNO <tony-o@iij.ad.jp> 6 * Internet Initiative Japan, Inc (IIJ) 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 #include <sys/param.h> 34 #include <sys/socket.h> 35 #include <net/if_types.h> 36 #include <net/route.h> 37 #include <net/if.h> 38 #include <netinet/in.h> 39 #include <arpa/inet.h> 40 #include <net/if_dl.h> 41 #include <netinet/in_systm.h> 42 #include <netinet/ip.h> 43 #include <sys/un.h> 44 45 #include <errno.h> 46 #include <stdarg.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 #include <sys/sysctl.h> 51 #include <termios.h> 52 #include <unistd.h> 53 54 #include "layer.h" 55 #include "defs.h" 56 #include "command.h" 57 #include "mbuf.h" 58 #include "log.h" 59 #include "iplist.h" 60 #include "timer.h" 61 #include "throughput.h" 62 #include "lqr.h" 63 #include "hdlc.h" 64 #include "fsm.h" 65 #include "lcp.h" 66 #include "ccp.h" 67 #include "link.h" 68 #include "slcompress.h" 69 #include "ncpaddr.h" 70 #include "ipcp.h" 71 #include "filter.h" 72 #include "descriptor.h" 73 #include "mp.h" 74 #ifndef NORADIUS 75 #include "radius.h" 76 #endif 77 #include "ipv6cp.h" 78 #include "ncp.h" 79 #include "bundle.h" 80 #include "route.h" 81 #include "prompt.h" 82 #include "iface.h" 83 #include "id.h" 84 85 86 static void 87 p_sockaddr(struct prompt *prompt, struct sockaddr *phost, 88 struct sockaddr *pmask, int width) 89 { 90 struct ncprange range; 91 char buf[29]; 92 struct sockaddr_dl *dl = (struct sockaddr_dl *)phost; 93 94 if (log_IsKept(LogDEBUG)) { 95 char tmp[50]; 96 97 log_Printf(LogDEBUG, "Found the following sockaddr:\n"); 98 log_Printf(LogDEBUG, " Family %d, len %d\n", 99 (int)phost->sa_family, (int)phost->sa_len); 100 inet_ntop(phost->sa_family, phost->sa_data, tmp, sizeof tmp); 101 log_Printf(LogDEBUG, " Addr %s\n", tmp); 102 if (pmask) { 103 inet_ntop(pmask->sa_family, pmask->sa_data, tmp, sizeof tmp); 104 log_Printf(LogDEBUG, " Mask %s\n", tmp); 105 } 106 } 107 108 switch (phost->sa_family) { 109 case AF_INET: 110 #ifndef NOINET6 111 case AF_INET6: 112 #endif 113 ncprange_setsa(&range, phost, pmask); 114 if (ncprange_isdefault(&range)) 115 prompt_Printf(prompt, "%-*s ", width - 1, "default"); 116 else 117 prompt_Printf(prompt, "%-*s ", width - 1, ncprange_ntoa(&range)); 118 return; 119 120 case AF_LINK: 121 if (dl->sdl_nlen) 122 snprintf(buf, sizeof buf, "%.*s", dl->sdl_nlen, dl->sdl_data); 123 else if (dl->sdl_alen) { 124 if (dl->sdl_type == IFT_ETHER) { 125 if (dl->sdl_alen < sizeof buf / 3) { 126 int f; 127 u_char *MAC; 128 129 MAC = (u_char *)dl->sdl_data + dl->sdl_nlen; 130 for (f = 0; f < dl->sdl_alen; f++) 131 sprintf(buf+f*3, "%02x:", MAC[f]); 132 buf[f*3-1] = '\0'; 133 } else 134 strcpy(buf, "??:??:??:??:??:??"); 135 } else 136 sprintf(buf, "<IFT type %d>", dl->sdl_type); 137 } else if (dl->sdl_slen) 138 sprintf(buf, "<slen %d?>", dl->sdl_slen); 139 else 140 sprintf(buf, "link#%d", dl->sdl_index); 141 break; 142 143 default: 144 sprintf(buf, "<AF type %d>", phost->sa_family); 145 break; 146 } 147 148 prompt_Printf(prompt, "%-*s ", width-1, buf); 149 } 150 151 static struct bits { 152 u_int32_t b_mask; 153 char b_val; 154 } bits[] = { 155 { RTF_UP, 'U' }, 156 { RTF_GATEWAY, 'G' }, 157 { RTF_HOST, 'H' }, 158 { RTF_REJECT, 'R' }, 159 { RTF_DYNAMIC, 'D' }, 160 { RTF_MODIFIED, 'M' }, 161 { RTF_DONE, 'd' }, 162 { RTF_XRESOLVE, 'X' }, 163 { RTF_STATIC, 'S' }, 164 { RTF_PROTO1, '1' }, 165 { RTF_PROTO2, '2' }, 166 { RTF_BLACKHOLE, 'B' }, 167 #ifdef RTF_LLINFO 168 { RTF_LLINFO, 'L' }, 169 #endif 170 #ifdef RTF_CLONING 171 { RTF_CLONING, '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 static void 183 p_flags(struct prompt *prompt, u_int32_t f, unsigned max) 184 { 185 char name[33], *flags; 186 register struct bits *p = bits; 187 188 if (max > sizeof name - 1) 189 max = sizeof name - 1; 190 191 for (flags = name; p->b_mask && flags - name < (int)max; p++) 192 if (p->b_mask & f) 193 *flags++ = p->b_val; 194 *flags = '\0'; 195 prompt_Printf(prompt, "%-*.*s", (int)max, (int)max, name); 196 } 197 198 static int route_nifs = -1; 199 200 const char * 201 Index2Nam(int idx) 202 { 203 /* 204 * XXX: Maybe we should select() on the routing socket so that we can 205 * notice interfaces that come & go (PCCARD support). 206 * Or we could even support a signal that resets these so that 207 * the PCCARD insert/remove events can signal ppp. 208 */ 209 static char **ifs; /* Figure these out once */ 210 static int debug_done; /* Debug once */ 211 212 if (idx > route_nifs || (idx > 0 && ifs[idx-1] == NULL)) { 213 int mib[6], have, had; 214 size_t needed; 215 char *buf, *ptr, *end; 216 struct sockaddr_dl *dl; 217 struct if_msghdr *ifm; 218 219 if (ifs) { 220 free(ifs); 221 ifs = NULL; 222 route_nifs = 0; 223 } 224 debug_done = 0; 225 226 mib[0] = CTL_NET; 227 mib[1] = PF_ROUTE; 228 mib[2] = 0; 229 mib[3] = 0; 230 mib[4] = NET_RT_IFLIST; 231 mib[5] = 0; 232 233 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 234 log_Printf(LogERROR, "Index2Nam: sysctl: estimate: %s\n", 235 strerror(errno)); 236 return NumStr(idx, NULL, 0); 237 } 238 if ((buf = malloc(needed)) == NULL) 239 return NumStr(idx, NULL, 0); 240 if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0) { 241 free(buf); 242 return NumStr(idx, NULL, 0); 243 } 244 end = buf + needed; 245 246 have = 0; 247 for (ptr = buf; ptr < end; ptr += ifm->ifm_msglen) { 248 ifm = (struct if_msghdr *)ptr; 249 if (ifm->ifm_type != RTM_IFINFO) 250 continue; 251 dl = (struct sockaddr_dl *)(ifm + 1); 252 if (ifm->ifm_index > 0) { 253 if (ifm->ifm_index > have) { 254 char **newifs; 255 256 had = have; 257 have = ifm->ifm_index + 5; 258 if (had) 259 newifs = (char **)realloc(ifs, sizeof(char *) * have); 260 else 261 newifs = (char **)malloc(sizeof(char *) * have); 262 if (!newifs) { 263 log_Printf(LogDEBUG, "Index2Nam: %s\n", strerror(errno)); 264 route_nifs = 0; 265 if (ifs) { 266 free(ifs); 267 ifs = NULL; 268 } 269 free(buf); 270 return NumStr(idx, NULL, 0); 271 } 272 ifs = newifs; 273 memset(ifs + had, '\0', sizeof(char *) * (have - had)); 274 } 275 if (ifs[ifm->ifm_index-1] == NULL) { 276 ifs[ifm->ifm_index-1] = (char *)malloc(dl->sdl_nlen+1); 277 if (ifs[ifm->ifm_index-1] == NULL) 278 log_Printf(LogDEBUG, "Skipping interface %d: Out of memory\n", 279 ifm->ifm_index); 280 else { 281 memcpy(ifs[ifm->ifm_index-1], dl->sdl_data, dl->sdl_nlen); 282 ifs[ifm->ifm_index-1][dl->sdl_nlen] = '\0'; 283 if (route_nifs < ifm->ifm_index) 284 route_nifs = ifm->ifm_index; 285 } 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 (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[NCP_ASCIIBUFFERSIZE]; 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 == 1) { 453 ncprange_setsa(&range, sa[RTAX_DST], sa[RTAX_NETMASK]); 454 rt_Set(bundle, RTM_DELETE, &range, NULL, 0, 0); 455 } else 456 log_Printf(LogDEBUG, "route_IfDelete: Skip it (pass %d)\n", pass); 457 } else 458 log_Printf(LogDEBUG, 459 "route_IfDelete: Can't remove routes for family %d\n", 460 sa[RTAX_GATEWAY]->sa_family); 461 } 462 } 463 } 464 free(sp); 465 } 466 467 468 /* 469 * Update the MTU on all routes for the given interface 470 */ 471 void 472 route_UpdateMTU(struct bundle *bundle) 473 { 474 struct rt_msghdr *rtm; 475 struct sockaddr *sa[RTAX_MAX]; 476 struct ncprange dst; 477 size_t needed; 478 char *sp, *cp, *ep; 479 int mib[6]; 480 481 log_Printf(LogDEBUG, "route_UpdateMTU (%d)\n", bundle->iface->index); 482 483 mib[0] = CTL_NET; 484 mib[1] = PF_ROUTE; 485 mib[2] = 0; 486 mib[3] = 0; 487 mib[4] = NET_RT_DUMP; 488 mib[5] = 0; 489 if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0) { 490 log_Printf(LogERROR, "route_IfDelete: sysctl: estimate: %s\n", 491 strerror(errno)); 492 return; 493 } 494 495 sp = malloc(needed); 496 if (sp == NULL) 497 return; 498 499 if (sysctl(mib, 6, sp, &needed, NULL, 0) < 0) { 500 log_Printf(LogERROR, "route_IfDelete: sysctl: getroute: %s\n", 501 strerror(errno)); 502 free(sp); 503 return; 504 } 505 ep = sp + needed; 506 507 for (cp = sp; cp < ep; cp += rtm->rtm_msglen) { 508 rtm = (struct rt_msghdr *)cp; 509 route_ParseHdr(rtm, sa); 510 if (sa[RTAX_DST] && (sa[RTAX_DST]->sa_family == AF_INET 511 #ifndef NOINET6 512 || sa[RTAX_DST]->sa_family == AF_INET6 513 #endif 514 ) && 515 sa[RTAX_GATEWAY] && rtm->rtm_index == bundle->iface->index) { 516 if (log_IsKept(LogTCPIP)) { 517 ncprange_setsa(&dst, sa[RTAX_DST], sa[RTAX_NETMASK]); 518 log_Printf(LogTCPIP, "route_UpdateMTU: Netif: %d (%s), dst %s," 519 " mtu %lu\n", rtm->rtm_index, Index2Nam(rtm->rtm_index), 520 ncprange_ntoa(&dst), bundle->iface->mtu); 521 } 522 rt_Update(bundle, sa[RTAX_DST], sa[RTAX_GATEWAY], sa[RTAX_NETMASK], 523 sa[RTAX_IFP], sa[RTAX_IFA]); 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 == NULL) { 617 r = (struct sticky_route *)malloc(sizeof(struct sticky_route)); 618 if (r == NULL) { 619 log_Printf(LogERROR, "route_Add: Out of memory!\n"); 620 return; 621 } 622 } 623 r->type = type; 624 r->next = NULL; 625 ncprange_copy(&r->dst, dst); 626 ncpaddr_copy(&r->gw, gw); 627 *rp = r; 628 } 629 630 void 631 route_Delete(struct sticky_route **rp, int type, const struct ncprange *dst) 632 { 633 struct sticky_route *r; 634 int dsttype = type & ROUTE_DSTANY; 635 636 for (; *rp; rp = &(*rp)->next) { 637 if ((dsttype && dsttype == ((*rp)->type & ROUTE_DSTANY)) || 638 (!dsttype && ncprange_equal(dst, &(*rp)->dst))) { 639 r = *rp; 640 *rp = r->next; 641 free(r); 642 break; 643 } 644 } 645 } 646 647 void 648 route_DeleteAll(struct sticky_route **rp) 649 { 650 struct sticky_route *r, *rn; 651 652 for (r = *rp; r; r = rn) { 653 rn = r->next; 654 free(r); 655 } 656 *rp = NULL; 657 } 658 659 void 660 route_ShowSticky(struct prompt *p, struct sticky_route *r, const char *tag, 661 int indent) 662 { 663 int tlen = strlen(tag); 664 665 if (tlen + 2 > indent) 666 prompt_Printf(p, "%s:\n%*s", tag, indent, ""); 667 else 668 prompt_Printf(p, "%s:%*s", tag, indent - tlen - 1, ""); 669 670 for (; r; r = r->next) { 671 prompt_Printf(p, "%*sadd ", tlen ? 0 : indent, ""); 672 tlen = 0; 673 if (r->type & ROUTE_DSTMYADDR) 674 prompt_Printf(p, "MYADDR"); 675 else if (r->type & ROUTE_DSTMYADDR6) 676 prompt_Printf(p, "MYADDR6"); 677 else if (r->type & ROUTE_DSTHISADDR) 678 prompt_Printf(p, "HISADDR"); 679 else if (r->type & ROUTE_DSTHISADDR6) 680 prompt_Printf(p, "HISADDR6"); 681 else if (r->type & ROUTE_DSTDNS0) 682 prompt_Printf(p, "DNS0"); 683 else if (r->type & ROUTE_DSTDNS1) 684 prompt_Printf(p, "DNS1"); 685 else if (ncprange_isdefault(&r->dst)) 686 prompt_Printf(p, "default"); 687 else 688 prompt_Printf(p, "%s", ncprange_ntoa(&r->dst)); 689 690 if (r->type & ROUTE_GWHISADDR) 691 prompt_Printf(p, " HISADDR\n"); 692 else if (r->type & ROUTE_GWHISADDR6) 693 prompt_Printf(p, " HISADDR6\n"); 694 else 695 prompt_Printf(p, " %s\n", ncpaddr_ntoa(&r->gw)); 696 } 697 } 698 699 struct rtmsg { 700 struct rt_msghdr m_rtm; 701 char m_space[256]; 702 }; 703 704 static size_t 705 memcpy_roundup(char *cp, const void *data, size_t len) 706 { 707 size_t padlen; 708 709 padlen = ROUNDUP(len); 710 memcpy(cp, data, len); 711 if (padlen > len) 712 memset(cp + len, '\0', padlen - len); 713 714 return padlen; 715 } 716 717 #if defined(__KAME__) && !defined(NOINET6) 718 static void 719 add_scope(struct sockaddr *sa, int ifindex) 720 { 721 struct sockaddr_in6 *sa6; 722 723 if (sa->sa_family != AF_INET6) 724 return; 725 sa6 = (struct sockaddr_in6 *)sa; 726 if (!IN6_IS_ADDR_LINKLOCAL(&sa6->sin6_addr) && 727 !IN6_IS_ADDR_MC_LINKLOCAL(&sa6->sin6_addr)) 728 return; 729 if (*(u_int16_t *)&sa6->sin6_addr.s6_addr[2] != 0) 730 return; 731 *(u_int16_t *)&sa6->sin6_addr.s6_addr[2] = htons(ifindex); 732 } 733 #endif 734 735 int 736 rt_Set(struct bundle *bundle, int cmd, const struct ncprange *dst, 737 const struct ncpaddr *gw, int bang, int quiet) 738 { 739 struct rtmsg rtmes; 740 int s, nb, wb; 741 char *cp; 742 const char *cmdstr; 743 struct sockaddr_storage sadst, samask, sagw; 744 int result = 1; 745 746 if (bang) 747 cmdstr = (cmd == RTM_ADD ? "Add!" : "Delete!"); 748 else 749 cmdstr = (cmd == RTM_ADD ? "Add" : "Delete"); 750 s = ID0socket(PF_ROUTE, SOCK_RAW, 0); 751 if (s < 0) { 752 log_Printf(LogERROR, "rt_Set: socket(): %s\n", strerror(errno)); 753 return result; 754 } 755 memset(&rtmes, '\0', sizeof rtmes); 756 rtmes.m_rtm.rtm_version = RTM_VERSION; 757 rtmes.m_rtm.rtm_type = cmd; 758 rtmes.m_rtm.rtm_addrs = RTA_DST; 759 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; 760 rtmes.m_rtm.rtm_pid = getpid(); 761 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_GATEWAY | RTF_STATIC; 762 763 if (cmd == RTM_ADD) { 764 if (bundle->ncp.cfg.sendpipe > 0) { 765 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.cfg.sendpipe; 766 rtmes.m_rtm.rtm_inits |= RTV_SPIPE; 767 } 768 if (bundle->ncp.cfg.recvpipe > 0) { 769 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.cfg.recvpipe; 770 rtmes.m_rtm.rtm_inits |= RTV_RPIPE; 771 } 772 } 773 774 ncprange_getsa(dst, &sadst, &samask); 775 #if defined(__KAME__) && !defined(NOINET6) 776 add_scope((struct sockaddr *)&sadst, bundle->iface->index); 777 #endif 778 779 cp = rtmes.m_space; 780 cp += memcpy_roundup(cp, &sadst, sadst.ss_len); 781 if (cmd == RTM_ADD) { 782 if (gw == NULL) { 783 log_Printf(LogERROR, "rt_Set: Program error\n"); 784 close(s); 785 return result; 786 } 787 ncpaddr_getsa(gw, &sagw); 788 #if defined(__KAME__) && !defined(NOINET6) 789 add_scope((struct sockaddr *)&sagw, bundle->iface->index); 790 #endif 791 if (ncpaddr_isdefault(gw)) { 792 if (!quiet) 793 log_Printf(LogERROR, "rt_Set: Cannot add a route with" 794 " gateway 0.0.0.0\n"); 795 close(s); 796 return result; 797 } else { 798 cp += memcpy_roundup(cp, &sagw, sagw.ss_len); 799 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; 800 } 801 } 802 803 if (!ncprange_ishost(dst)) { 804 cp += memcpy_roundup(cp, &samask, samask.ss_len); 805 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; 806 } else 807 rtmes.m_rtm.rtm_flags |= RTF_HOST; 808 809 nb = cp - (char *)&rtmes; 810 rtmes.m_rtm.rtm_msglen = nb; 811 wb = ID0write(s, &rtmes, nb); 812 if (wb < 0) { 813 log_Printf(LogTCPIP, "rt_Set failure:\n"); 814 log_Printf(LogTCPIP, "rt_Set: Cmd = %s\n", cmdstr); 815 log_Printf(LogTCPIP, "rt_Set: Dst = %s\n", ncprange_ntoa(dst)); 816 if (gw != NULL) 817 log_Printf(LogTCPIP, "rt_Set: Gateway = %s\n", ncpaddr_ntoa(gw)); 818 failed: 819 if (cmd == RTM_ADD && (rtmes.m_rtm.rtm_errno == EEXIST || 820 (rtmes.m_rtm.rtm_errno == 0 && errno == EEXIST))) { 821 if (!bang) { 822 log_Printf(LogWARN, "Add route failed: %s already exists\n", 823 ncprange_ntoa(dst)); 824 result = 0; /* Don't add to our dynamic list */ 825 } else { 826 rtmes.m_rtm.rtm_type = cmd = RTM_CHANGE; 827 if ((wb = ID0write(s, &rtmes, nb)) < 0) 828 goto failed; 829 } 830 } else if (cmd == RTM_DELETE && 831 (rtmes.m_rtm.rtm_errno == ESRCH || 832 (rtmes.m_rtm.rtm_errno == 0 && errno == ESRCH))) { 833 if (!bang) 834 log_Printf(LogWARN, "Del route failed: %s: Non-existent\n", 835 ncprange_ntoa(dst)); 836 } else if (rtmes.m_rtm.rtm_errno == 0) { 837 if (!quiet || errno != ENETUNREACH) 838 log_Printf(LogWARN, "%s route failed: %s: errno: %s\n", cmdstr, 839 ncprange_ntoa(dst), strerror(errno)); 840 } else 841 log_Printf(LogWARN, "%s route failed: %s: %s\n", 842 cmdstr, ncprange_ntoa(dst), strerror(rtmes.m_rtm.rtm_errno)); 843 } 844 845 if (log_IsKept(LogDEBUG)) { 846 char gwstr[NCP_ASCIIBUFFERSIZE]; 847 848 if (gw) 849 snprintf(gwstr, sizeof gwstr, "%s", ncpaddr_ntoa(gw)); 850 else 851 snprintf(gwstr, sizeof gwstr, "<none>"); 852 log_Printf(LogDEBUG, "wrote %d: cmd = %s, dst = %s, gateway = %s\n", 853 wb, cmdstr, ncprange_ntoa(dst), gwstr); 854 } 855 close(s); 856 857 return result; 858 } 859 860 void 861 rt_Update(struct bundle *bundle, const struct sockaddr *dst, 862 const struct sockaddr *gw, const struct sockaddr *mask, 863 const struct sockaddr *ifp, const struct sockaddr *ifa) 864 { 865 struct ncprange ncpdst; 866 struct rtmsg rtmes; 867 char *p; 868 int s, wb; 869 870 s = ID0socket(PF_ROUTE, SOCK_RAW, 0); 871 if (s < 0) { 872 log_Printf(LogERROR, "rt_Update: socket(): %s\n", strerror(errno)); 873 return; 874 } 875 876 memset(&rtmes, '\0', sizeof rtmes); 877 rtmes.m_rtm.rtm_version = RTM_VERSION; 878 rtmes.m_rtm.rtm_type = RTM_CHANGE; 879 rtmes.m_rtm.rtm_addrs = 0; 880 rtmes.m_rtm.rtm_seq = ++bundle->routing_seq; 881 rtmes.m_rtm.rtm_pid = getpid(); 882 rtmes.m_rtm.rtm_flags = RTF_UP | RTF_STATIC; 883 884 if (bundle->ncp.cfg.sendpipe > 0) { 885 rtmes.m_rtm.rtm_rmx.rmx_sendpipe = bundle->ncp.cfg.sendpipe; 886 rtmes.m_rtm.rtm_inits |= RTV_SPIPE; 887 } 888 889 if (bundle->ncp.cfg.recvpipe > 0) { 890 rtmes.m_rtm.rtm_rmx.rmx_recvpipe = bundle->ncp.cfg.recvpipe; 891 rtmes.m_rtm.rtm_inits |= RTV_RPIPE; 892 } 893 894 rtmes.m_rtm.rtm_rmx.rmx_mtu = bundle->iface->mtu; 895 rtmes.m_rtm.rtm_inits |= RTV_MTU; 896 p = rtmes.m_space; 897 898 if (dst) { 899 rtmes.m_rtm.rtm_addrs |= RTA_DST; 900 p += memcpy_roundup(p, dst, dst->sa_len); 901 } 902 903 if (gw) { 904 rtmes.m_rtm.rtm_addrs |= RTA_GATEWAY; 905 p += memcpy_roundup(p, gw, gw->sa_len); 906 } 907 908 if (mask) { 909 rtmes.m_rtm.rtm_addrs |= RTA_NETMASK; 910 p += memcpy_roundup(p, mask, mask->sa_len); 911 } else 912 rtmes.m_rtm.rtm_flags |= RTF_HOST; 913 914 if (ifa && ifp && ifp->sa_family == AF_LINK) { 915 rtmes.m_rtm.rtm_addrs |= RTA_IFP; 916 p += memcpy_roundup(p, ifp, ifp->sa_len); 917 rtmes.m_rtm.rtm_addrs |= RTA_IFA; 918 p += memcpy_roundup(p, ifa, ifa->sa_len); 919 } 920 921 rtmes.m_rtm.rtm_msglen = p - (char *)&rtmes; 922 923 wb = ID0write(s, &rtmes, rtmes.m_rtm.rtm_msglen); 924 if (wb < 0) { 925 ncprange_setsa(&ncpdst, dst, mask); 926 927 log_Printf(LogTCPIP, "rt_Update failure:\n"); 928 log_Printf(LogTCPIP, "rt_Update: Dst = %s\n", ncprange_ntoa(&ncpdst)); 929 930 if (rtmes.m_rtm.rtm_errno == 0) 931 log_Printf(LogWARN, "%s: Change route failed: errno: %s\n", 932 ncprange_ntoa(&ncpdst), strerror(errno)); 933 else 934 log_Printf(LogWARN, "%s: Change route failed: %s\n", 935 ncprange_ntoa(&ncpdst), strerror(rtmes.m_rtm.rtm_errno)); 936 } 937 close(s); 938 } 939