1/* 2 * iproute.c "ip route". 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 * 9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 10 * 11 * 12 * Changes: 13 * 14 * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses 15 * Kunihiro Ishiguro <kunihiro@zebra.org> 001102: rtnh_ifindex was not initialized 16 */ 17 18#include <stdio.h> 19#include <stdlib.h> 20#include <unistd.h> 21#include <syslog.h> 22#include <fcntl.h> 23#include <string.h> 24#include <time.h> 25#include <sys/time.h> 26#include <sys/socket.h> 27#include <netinet/in.h> 28#include <netinet/ip.h> 29#include <arpa/inet.h> 30#include <linux/in_route.h> 31#include <linux/ip_mp_alg.h> 32 33#include "rt_names.h" 34#include "utils.h" 35#include "ip_common.h" 36 37#ifndef RTAX_RTTVAR 38#define RTAX_RTTVAR RTAX_HOPS 39#endif 40 41 42static void usage(void) __attribute__((noreturn)); 43 44static void usage(void) 45{ 46 fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n"); 47 fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n"); 48 fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n"); 49 fprintf(stderr, " ip route { add | del | change | append | replace | monitor } ROUTE\n"); 50 fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"); 51 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n"); 52 fprintf(stderr, " [ type TYPE ] [ scope SCOPE ]\n"); 53 fprintf(stderr, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"); 54 fprintf(stderr, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"); 55 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n"); 56 fprintf(stderr, " [ scope SCOPE ] [ metric METRIC ]\n"); 57 fprintf(stderr, " [ mpath MP_ALGO ]\n"); 58 fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n"); 59 fprintf(stderr, "NH := [ via ADDRESS ] [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"); 60 fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ]\n"); 61 fprintf(stderr, " [ rtt NUMBER ] [ rttvar NUMBER ]\n"); 62 fprintf(stderr, " [ window NUMBER] [ cwnd NUMBER ] [ ssthresh NUMBER ]\n"); 63 fprintf(stderr, " [ realms REALM ]\n"); 64 fprintf(stderr, "TYPE := [ unicast | local | broadcast | multicast | throw |\n"); 65 fprintf(stderr, " unreachable | prohibit | blackhole | nat ]\n"); 66 fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n"); 67 fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n"); 68 fprintf(stderr, "FLAGS := [ equalize ]\n"); 69 fprintf(stderr, "MP_ALGO := { rr | drr | random | wrandom }\n"); 70 fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n"); 71 fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n"); 72 exit(-1); 73} 74 75 76static struct 77{ 78 int tb; 79 int flushed; 80 char *flushb; 81 int flushp; 82 int flushe; 83 int protocol, protocolmask; 84 int scope, scopemask; 85 int type, typemask; 86 int tos, tosmask; 87 int iif, iifmask; 88 int oif, oifmask; 89 int realm, realmmask; 90 inet_prefix rprefsrc; 91 inet_prefix rvia; 92 inet_prefix rdst; 93 inet_prefix mdst; 94 inet_prefix rsrc; 95 inet_prefix msrc; 96} filter; 97 98static char *mp_alg_names[IP_MP_ALG_MAX+1] = { 99 [IP_MP_ALG_NONE] = "none", 100 [IP_MP_ALG_RR] = "rr", 101 [IP_MP_ALG_DRR] = "drr", 102 [IP_MP_ALG_RANDOM] = "random", 103 [IP_MP_ALG_WRANDOM] = "wrandom" 104}; 105 106static int flush_update(void) 107{ 108 if (rtnl_send(&rth, filter.flushb, filter.flushp) < 0) { 109 perror("Failed to send flush request\n"); 110 return -1; 111 } 112 filter.flushp = 0; 113 return 0; 114} 115 116int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) 117{ 118 FILE *fp = (FILE*)arg; 119 struct rtmsg *r = NLMSG_DATA(n); 120 int len = n->nlmsg_len; 121 struct rtattr * tb[RTA_MAX+1]; 122 char abuf[256]; 123 inet_prefix dst; 124 inet_prefix src; 125 inet_prefix prefsrc; 126 inet_prefix via; 127 int host_len = -1; 128 SPRINT_BUF(b1); 129 130 131 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) { 132 fprintf(stderr, "Not a route: %08x %08x %08x\n", 133 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags); 134 return 0; 135 } 136 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE) 137 return 0; 138 len -= NLMSG_LENGTH(sizeof(*r)); 139 if (len < 0) { 140 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len); 141 return -1; 142 } 143 144 if (r->rtm_family == AF_INET6) 145 host_len = 128; 146 else if (r->rtm_family == AF_INET) 147 host_len = 32; 148 else if (r->rtm_family == AF_DECnet) 149 host_len = 16; 150 else if (r->rtm_family == AF_IPX) 151 host_len = 80; 152 153 if (r->rtm_family == AF_INET6) { 154 if (filter.tb) { 155 if (filter.tb < 0) { 156 if (!(r->rtm_flags&RTM_F_CLONED)) 157 return 0; 158 } else { 159 if (r->rtm_flags&RTM_F_CLONED) 160 return 0; 161 if (filter.tb == RT_TABLE_LOCAL) { 162 if (r->rtm_type != RTN_LOCAL) 163 return 0; 164 } else if (filter.tb == RT_TABLE_MAIN) { 165 if (r->rtm_type == RTN_LOCAL) 166 return 0; 167 } else { 168 return 0; 169 } 170 } 171 } 172 } else { 173 if (filter.tb > 0 && filter.tb != r->rtm_table) 174 return 0; 175 } 176 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask) 177 return 0; 178 if ((filter.scope^r->rtm_scope)&filter.scopemask) 179 return 0; 180 if ((filter.type^r->rtm_type)&filter.typemask) 181 return 0; 182 if ((filter.tos^r->rtm_tos)&filter.tosmask) 183 return 0; 184 if (filter.rdst.family && 185 (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len)) 186 return 0; 187 if (filter.mdst.family && 188 (r->rtm_family != filter.mdst.family || 189 (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len))) 190 return 0; 191 if (filter.rsrc.family && 192 (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len)) 193 return 0; 194 if (filter.msrc.family && 195 (r->rtm_family != filter.msrc.family || 196 (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len))) 197 return 0; 198 if (filter.rvia.family && r->rtm_family != filter.rvia.family) 199 return 0; 200 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family) 201 return 0; 202 203 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len); 204 205 memset(&dst, 0, sizeof(dst)); 206 dst.family = r->rtm_family; 207 if (tb[RTA_DST]) 208 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8); 209 if (filter.rsrc.family || filter.msrc.family) { 210 memset(&src, 0, sizeof(src)); 211 src.family = r->rtm_family; 212 if (tb[RTA_SRC]) 213 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8); 214 } 215 if (filter.rvia.bitlen>0) { 216 memset(&via, 0, sizeof(via)); 217 via.family = r->rtm_family; 218 if (tb[RTA_GATEWAY]) 219 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len); 220 } 221 if (filter.rprefsrc.bitlen>0) { 222 memset(&prefsrc, 0, sizeof(prefsrc)); 223 prefsrc.family = r->rtm_family; 224 if (tb[RTA_PREFSRC]) 225 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len); 226 } 227 228 if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen)) 229 return 0; 230 if (filter.mdst.family && filter.mdst.bitlen >= 0 && 231 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len)) 232 return 0; 233 234 if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen)) 235 return 0; 236 if (filter.msrc.family && filter.msrc.bitlen >= 0 && 237 inet_addr_match(&src, &filter.msrc, r->rtm_src_len)) 238 return 0; 239 240 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen)) 241 return 0; 242 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen)) 243 return 0; 244 if (filter.realmmask) { 245 __u32 realms = 0; 246 if (tb[RTA_FLOW]) 247 realms = *(__u32*)RTA_DATA(tb[RTA_FLOW]); 248 if ((realms^filter.realm)&filter.realmmask) 249 return 0; 250 } 251 if (filter.iifmask) { 252 int iif = 0; 253 if (tb[RTA_IIF]) 254 iif = *(int*)RTA_DATA(tb[RTA_IIF]); 255 if ((iif^filter.iif)&filter.iifmask) 256 return 0; 257 } 258 if (filter.oifmask) { 259 int oif = 0; 260 if (tb[RTA_OIF]) 261 oif = *(int*)RTA_DATA(tb[RTA_OIF]); 262 if ((oif^filter.oif)&filter.oifmask) 263 return 0; 264 } 265 if (filter.flushb && 266 r->rtm_family == AF_INET6 && 267 r->rtm_dst_len == 0 && 268 r->rtm_type == RTN_UNREACHABLE && 269 tb[RTA_PRIORITY] && 270 *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1) 271 return 0; 272 273 if (filter.flushb) { 274 struct nlmsghdr *fn; 275 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) { 276 if (flush_update()) 277 return -1; 278 } 279 fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp)); 280 memcpy(fn, n, n->nlmsg_len); 281 fn->nlmsg_type = RTM_DELROUTE; 282 fn->nlmsg_flags = NLM_F_REQUEST; 283 fn->nlmsg_seq = ++rth.seq; 284 filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb; 285 filter.flushed++; 286 if (show_stats < 2) 287 return 0; 288 } 289 290 if (n->nlmsg_type == RTM_DELROUTE) 291 fprintf(fp, "Deleted "); 292 if (r->rtm_type != RTN_UNICAST && !filter.type) 293 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1))); 294 295 if (tb[RTA_DST]) { 296 if (r->rtm_dst_len != host_len) { 297 fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family, 298 RTA_PAYLOAD(tb[RTA_DST]), 299 RTA_DATA(tb[RTA_DST]), 300 abuf, sizeof(abuf)), 301 r->rtm_dst_len 302 ); 303 } else { 304 fprintf(fp, "%s ", format_host(r->rtm_family, 305 RTA_PAYLOAD(tb[RTA_DST]), 306 RTA_DATA(tb[RTA_DST]), 307 abuf, sizeof(abuf)) 308 ); 309 } 310 } else if (r->rtm_dst_len) { 311 fprintf(fp, "0/%d ", r->rtm_dst_len); 312 } else { 313 fprintf(fp, "default "); 314 } 315 if (tb[RTA_SRC]) { 316 if (r->rtm_src_len != host_len) { 317 fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family, 318 RTA_PAYLOAD(tb[RTA_SRC]), 319 RTA_DATA(tb[RTA_SRC]), 320 abuf, sizeof(abuf)), 321 r->rtm_src_len 322 ); 323 } else { 324 fprintf(fp, "from %s ", format_host(r->rtm_family, 325 RTA_PAYLOAD(tb[RTA_SRC]), 326 RTA_DATA(tb[RTA_SRC]), 327 abuf, sizeof(abuf)) 328 ); 329 } 330 } else if (r->rtm_src_len) { 331 fprintf(fp, "from 0/%u ", r->rtm_src_len); 332 } 333 if (r->rtm_tos && filter.tosmask != -1) { 334 SPRINT_BUF(b1); 335 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1))); 336 } 337 338 if (tb[RTA_MP_ALGO]) { 339 __u32 mp_alg = *(__u32*) RTA_DATA(tb[RTA_MP_ALGO]); 340 if (mp_alg > IP_MP_ALG_NONE) { 341 fprintf(fp, "mpath %s ", 342 mp_alg < IP_MP_ALG_MAX ? mp_alg_names[mp_alg] : "unknown"); 343 } 344 } 345 346 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) { 347 fprintf(fp, "via %s ", 348 format_host(r->rtm_family, 349 RTA_PAYLOAD(tb[RTA_GATEWAY]), 350 RTA_DATA(tb[RTA_GATEWAY]), 351 abuf, sizeof(abuf))); 352 } 353 if (tb[RTA_OIF] && filter.oifmask != -1) 354 fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF]))); 355 356 if (!(r->rtm_flags&RTM_F_CLONED)) { 357 if (r->rtm_table != RT_TABLE_MAIN && !filter.tb) 358 fprintf(fp, " table %s ", rtnl_rttable_n2a(r->rtm_table, b1, sizeof(b1))); 359 if (r->rtm_protocol != RTPROT_BOOT && filter.protocolmask != -1) 360 fprintf(fp, " proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1))); 361 if (r->rtm_scope != RT_SCOPE_UNIVERSE && filter.scopemask != -1) 362 fprintf(fp, " scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1))); 363 } 364 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) { 365 /* Do not use format_host(). It is our local addr 366 and symbolic name will not be useful. 367 */ 368 fprintf(fp, " src %s ", 369 rt_addr_n2a(r->rtm_family, 370 RTA_PAYLOAD(tb[RTA_PREFSRC]), 371 RTA_DATA(tb[RTA_PREFSRC]), 372 abuf, sizeof(abuf))); 373 } 374 if (tb[RTA_PRIORITY]) 375 fprintf(fp, " metric %d ", *(__u32*)RTA_DATA(tb[RTA_PRIORITY])); 376 if (r->rtm_flags & RTNH_F_DEAD) 377 fprintf(fp, "dead "); 378 if (r->rtm_flags & RTNH_F_ONLINK) 379 fprintf(fp, "onlink "); 380 if (r->rtm_flags & RTNH_F_PERVASIVE) 381 fprintf(fp, "pervasive "); 382 if (r->rtm_flags & RTM_F_EQUALIZE) 383 fprintf(fp, "equalize "); 384 if (r->rtm_flags & RTM_F_NOTIFY) 385 fprintf(fp, "notify "); 386 387 if (tb[RTA_FLOW] && filter.realmmask != ~0U) { 388 __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]); 389 __u32 from = to>>16; 390 to &= 0xFFFF; 391 fprintf(fp, "realm%s ", from ? "s" : ""); 392 if (from) { 393 fprintf(fp, "%s/", 394 rtnl_rtrealm_n2a(from, b1, sizeof(b1))); 395 } 396 fprintf(fp, "%s ", 397 rtnl_rtrealm_n2a(to, b1, sizeof(b1))); 398 } 399 if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) { 400 __u32 flags = r->rtm_flags&~0xFFFF; 401 int first = 1; 402 403 fprintf(fp, "%s cache ", _SL_); 404 405#define PRTFL(fl,flname) if (flags&RTCF_##fl) { \ 406 flags &= ~RTCF_##fl; \ 407 fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \ 408 first = 0; } 409 PRTFL(LOCAL, "local"); 410 PRTFL(REJECT, "reject"); 411 PRTFL(MULTICAST, "mc"); 412 PRTFL(BROADCAST, "brd"); 413 PRTFL(DNAT, "dst-nat"); 414 PRTFL(SNAT, "src-nat"); 415 PRTFL(MASQ, "masq"); 416 PRTFL(DIRECTDST, "dst-direct"); 417 PRTFL(DIRECTSRC, "src-direct"); 418 PRTFL(REDIRECTED, "redirected"); 419 PRTFL(DOREDIRECT, "redirect"); 420 PRTFL(FAST, "fastroute"); 421 PRTFL(NOTIFY, "notify"); 422 PRTFL(TPROXY, "proxy"); 423#ifdef RTCF_EQUALIZE 424 PRTFL(EQUALIZE, "equalize"); 425#endif 426 if (flags) 427 fprintf(fp, "%s%x> ", first ? "<" : "", flags); 428 if (tb[RTA_CACHEINFO]) { 429 struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]); 430 static int hz; 431 if (!hz) 432 hz = get_user_hz(); 433 if (ci->rta_expires != 0) 434 fprintf(fp, " expires %dsec", ci->rta_expires/hz); 435 if (ci->rta_error != 0) 436 fprintf(fp, " error %d", ci->rta_error); 437 if (show_stats) { 438 if (ci->rta_clntref) 439 fprintf(fp, " users %d", ci->rta_clntref); 440 if (ci->rta_used != 0) 441 fprintf(fp, " used %d", ci->rta_used); 442 if (ci->rta_lastuse != 0) 443 fprintf(fp, " age %dsec", ci->rta_lastuse/hz); 444 } 445#ifdef RTNETLINK_HAVE_PEERINFO 446 if (ci->rta_id) 447 fprintf(fp, " ipid 0x%04x", ci->rta_id); 448 if (ci->rta_ts || ci->rta_tsage) 449 fprintf(fp, " ts 0x%x tsage %dsec", ci->rta_ts, ci->rta_tsage); 450#endif 451 } 452 } else if (r->rtm_family == AF_INET6) { 453 struct rta_cacheinfo *ci = NULL; 454 if (tb[RTA_CACHEINFO]) 455 ci = RTA_DATA(tb[RTA_CACHEINFO]); 456 if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) { 457 static int hz; 458 if (!hz) 459 hz = get_user_hz(); 460 if (r->rtm_flags & RTM_F_CLONED) 461 fprintf(fp, "%s cache ", _SL_); 462 if (ci->rta_expires) 463 fprintf(fp, " expires %dsec", ci->rta_expires/hz); 464 if (ci->rta_error != 0) 465 fprintf(fp, " error %d", ci->rta_error); 466 if (show_stats) { 467 if (ci->rta_clntref) 468 fprintf(fp, " users %d", ci->rta_clntref); 469 if (ci->rta_used != 0) 470 fprintf(fp, " used %d", ci->rta_used); 471 if (ci->rta_lastuse != 0) 472 fprintf(fp, " age %dsec", ci->rta_lastuse/hz); 473 } 474 } else if (ci) { 475 if (ci->rta_error != 0) 476 fprintf(fp, " error %d", ci->rta_error); 477 } 478 } 479 if (tb[RTA_METRICS]) { 480 int i; 481 unsigned mxlock = 0; 482 struct rtattr *mxrta[RTAX_MAX+1]; 483 484 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), 485 RTA_PAYLOAD(tb[RTA_METRICS])); 486 if (mxrta[RTAX_LOCK]) 487 mxlock = *(unsigned*)RTA_DATA(mxrta[RTAX_LOCK]); 488 489 for (i=2; i<=RTAX_MAX; i++) { 490 static char *mx_names[] = 491 { 492 "mtu", 493 "window", 494 "rtt", 495 "rttvar", 496 "ssthresh", 497 "cwnd", 498 "advmss", 499 "reordering", 500 }; 501 static int hz; 502 if (mxrta[i] == NULL) 503 continue; 504 if (!hz) 505 hz = get_hz(); 506 if (i-2 < sizeof(mx_names)/sizeof(char*)) 507 fprintf(fp, " %s", mx_names[i-2]); 508 else 509 fprintf(fp, " metric %d", i); 510 if (mxlock & (1<<i)) 511 fprintf(fp, " lock"); 512 513 if (i != RTAX_RTT && i != RTAX_RTTVAR) 514 fprintf(fp, " %u", *(unsigned*)RTA_DATA(mxrta[i])); 515 else { 516 unsigned val = *(unsigned*)RTA_DATA(mxrta[i]); 517 518 val *= 1000; 519 if (i == RTAX_RTT) 520 val /= 8; 521 else 522 val /= 4; 523 if (val >= hz) 524 fprintf(fp, " %ums", val/hz); 525 else 526 fprintf(fp, " %.2fms", (float)val/hz); 527 } 528 } 529 } 530 if (tb[RTA_IIF] && filter.iifmask != -1) { 531 fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF]))); 532 } 533 if (tb[RTA_MULTIPATH]) { 534 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]); 535 int first = 0; 536 537 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); 538 539 for (;;) { 540 if (len < sizeof(*nh)) 541 break; 542 if (nh->rtnh_len > len) 543 break; 544 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) { 545 if (first) 546 fprintf(fp, " Oifs:"); 547 else 548 fprintf(fp, " "); 549 } else 550 fprintf(fp, "%s\tnexthop", _SL_); 551 if (nh->rtnh_len > sizeof(*nh)) { 552 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh)); 553 if (tb[RTA_GATEWAY]) { 554 fprintf(fp, " via %s ", 555 format_host(r->rtm_family, 556 RTA_PAYLOAD(tb[RTA_GATEWAY]), 557 RTA_DATA(tb[RTA_GATEWAY]), 558 abuf, sizeof(abuf))); 559 } 560 } 561 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) { 562 fprintf(fp, " %s", ll_index_to_name(nh->rtnh_ifindex)); 563 if (nh->rtnh_hops != 1) 564 fprintf(fp, "(ttl>%d)", nh->rtnh_hops); 565 } else { 566 fprintf(fp, " dev %s", ll_index_to_name(nh->rtnh_ifindex)); 567 fprintf(fp, " weight %d", nh->rtnh_hops+1); 568 } 569 if (nh->rtnh_flags & RTNH_F_DEAD) 570 fprintf(fp, " dead"); 571 if (nh->rtnh_flags & RTNH_F_ONLINK) 572 fprintf(fp, " onlink"); 573 if (nh->rtnh_flags & RTNH_F_PERVASIVE) 574 fprintf(fp, " pervasive"); 575 len -= NLMSG_ALIGN(nh->rtnh_len); 576 nh = RTNH_NEXT(nh); 577 } 578 } 579 fprintf(fp, "\n"); 580 fflush(fp); 581 return 0; 582} 583 584 585int parse_one_nh(struct rtattr *rta, struct rtnexthop *rtnh, int *argcp, char ***argvp) 586{ 587 int argc = *argcp; 588 char **argv = *argvp; 589 590 while (++argv, --argc > 0) { 591 if (strcmp(*argv, "via") == 0) { 592 NEXT_ARG(); 593 rta_addattr32(rta, 4096, RTA_GATEWAY, get_addr32(*argv)); 594 rtnh->rtnh_len += sizeof(struct rtattr) + 4; 595 } else if (strcmp(*argv, "dev") == 0) { 596 NEXT_ARG(); 597 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) { 598 fprintf(stderr, "Cannot find device \"%s\"\n", *argv); 599 exit(1); 600 } 601 } else if (strcmp(*argv, "weight") == 0) { 602 unsigned w; 603 NEXT_ARG(); 604 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256) 605 invarg("\"weight\" is invalid\n", *argv); 606 rtnh->rtnh_hops = w - 1; 607 } else if (strcmp(*argv, "onlink") == 0) { 608 rtnh->rtnh_flags |= RTNH_F_ONLINK; 609 } else 610 break; 611 } 612 *argcp = argc; 613 *argvp = argv; 614 return 0; 615} 616 617int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r, int argc, char **argv) 618{ 619 char buf[1024]; 620 struct rtattr *rta = (void*)buf; 621 struct rtnexthop *rtnh; 622 623 rta->rta_type = RTA_MULTIPATH; 624 rta->rta_len = RTA_LENGTH(0); 625 rtnh = RTA_DATA(rta); 626 627 while (argc > 0) { 628 if (strcmp(*argv, "nexthop") != 0) { 629 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv); 630 exit(-1); 631 } 632 if (argc <= 1) { 633 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n"); 634 exit(-1); 635 } 636 memset(rtnh, 0, sizeof(*rtnh)); 637 rtnh->rtnh_len = sizeof(*rtnh); 638 rta->rta_len += rtnh->rtnh_len; 639 parse_one_nh(rta, rtnh, &argc, &argv); 640 rtnh = RTNH_NEXT(rtnh); 641 } 642 643 if (rta->rta_len > RTA_LENGTH(0)) 644 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta)); 645 return 0; 646} 647 648 649int iproute_modify(int cmd, unsigned flags, int argc, char **argv) 650{ 651 struct { 652 struct nlmsghdr n; 653 struct rtmsg r; 654 char buf[1024]; 655 } req; 656 char mxbuf[256]; 657 struct rtattr * mxrta = (void*)mxbuf; 658 unsigned mxlock = 0; 659 char *d = NULL; 660 int gw_ok = 0; 661 int dst_ok = 0; 662 int nhs_ok = 0; 663 int scope_ok = 0; 664 int table_ok = 0; 665 int proto_ok = 0; 666 int type_ok = 0; 667 668 memset(&req, 0, sizeof(req)); 669 670 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); 671 req.n.nlmsg_flags = NLM_F_REQUEST|flags; 672 req.n.nlmsg_type = cmd; 673 req.r.rtm_family = preferred_family; 674 req.r.rtm_table = RT_TABLE_MAIN; 675 req.r.rtm_scope = RT_SCOPE_NOWHERE; 676 677 if (cmd != RTM_DELROUTE) { 678 req.r.rtm_protocol = RTPROT_BOOT; 679 req.r.rtm_scope = RT_SCOPE_UNIVERSE; 680 req.r.rtm_type = RTN_UNICAST; 681 } 682 683 mxrta->rta_type = RTA_METRICS; 684 mxrta->rta_len = RTA_LENGTH(0); 685 686 while (argc > 0) { 687 if (strcmp(*argv, "src") == 0) { 688 inet_prefix addr; 689 NEXT_ARG(); 690 get_addr(&addr, *argv, req.r.rtm_family); 691 if (req.r.rtm_family == AF_UNSPEC) 692 req.r.rtm_family = addr.family; 693 addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen); 694 } else if (strcmp(*argv, "via") == 0) { 695 inet_prefix addr; 696 gw_ok = 1; 697 NEXT_ARG(); 698 get_addr(&addr, *argv, req.r.rtm_family); 699 if (req.r.rtm_family == AF_UNSPEC) 700 req.r.rtm_family = addr.family; 701 addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen); 702 } else if (strcmp(*argv, "from") == 0) { 703 inet_prefix addr; 704 NEXT_ARG(); 705 get_prefix(&addr, *argv, req.r.rtm_family); 706 if (req.r.rtm_family == AF_UNSPEC) 707 req.r.rtm_family = addr.family; 708 if (addr.bytelen) 709 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen); 710 req.r.rtm_src_len = addr.bitlen; 711 } else if (strcmp(*argv, "tos") == 0 || 712 matches(*argv, "dsfield") == 0) { 713 __u32 tos; 714 NEXT_ARG(); 715 if (rtnl_dsfield_a2n(&tos, *argv)) 716 invarg("\"tos\" value is invalid\n", *argv); 717 req.r.rtm_tos = tos; 718 } else if (matches(*argv, "metric") == 0 || 719 matches(*argv, "priority") == 0 || 720 matches(*argv, "preference") == 0) { 721 __u32 metric; 722 NEXT_ARG(); 723 if (get_u32(&metric, *argv, 0)) 724 invarg("\"metric\" value is invalid\n", *argv); 725 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric); 726 } else if (strcmp(*argv, "scope") == 0) { 727 __u32 scope = 0; 728 NEXT_ARG(); 729 if (rtnl_rtscope_a2n(&scope, *argv)) 730 invarg("invalid \"scope\" value\n", *argv); 731 req.r.rtm_scope = scope; 732 scope_ok = 1; 733 } else if (strcmp(*argv, "mtu") == 0) { 734 unsigned mtu; 735 NEXT_ARG(); 736 if (strcmp(*argv, "lock") == 0) { 737 mxlock |= (1<<RTAX_MTU); 738 NEXT_ARG(); 739 } 740 if (get_unsigned(&mtu, *argv, 0)) 741 invarg("\"mtu\" value is invalid\n", *argv); 742 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu); 743#ifdef RTAX_ADVMSS 744 } else if (strcmp(*argv, "advmss") == 0) { 745 unsigned mss; 746 NEXT_ARG(); 747 if (strcmp(*argv, "lock") == 0) { 748 mxlock |= (1<<RTAX_ADVMSS); 749 NEXT_ARG(); 750 } 751 if (get_unsigned(&mss, *argv, 0)) 752 invarg("\"mss\" value is invalid\n", *argv); 753 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss); 754#endif 755#ifdef RTAX_REORDERING 756 } else if (matches(*argv, "reordering") == 0) { 757 unsigned reord; 758 NEXT_ARG(); 759 if (strcmp(*argv, "lock") == 0) { 760 mxlock |= (1<<RTAX_REORDERING); 761 NEXT_ARG(); 762 } 763 if (get_unsigned(&reord, *argv, 0)) 764 invarg("\"reordering\" value is invalid\n", *argv); 765 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord); 766#endif 767 } else if (strcmp(*argv, "rtt") == 0) { 768 unsigned rtt; 769 NEXT_ARG(); 770 if (strcmp(*argv, "lock") == 0) { 771 mxlock |= (1<<RTAX_RTT); 772 NEXT_ARG(); 773 } 774 if (get_unsigned(&rtt, *argv, 0)) 775 invarg("\"rtt\" value is invalid\n", *argv); 776 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT, rtt); 777 } else if (matches(*argv, "window") == 0) { 778 unsigned win; 779 NEXT_ARG(); 780 if (strcmp(*argv, "lock") == 0) { 781 mxlock |= (1<<RTAX_WINDOW); 782 NEXT_ARG(); 783 } 784 if (get_unsigned(&win, *argv, 0)) 785 invarg("\"window\" value is invalid\n", *argv); 786 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win); 787 } else if (matches(*argv, "cwnd") == 0) { 788 unsigned win; 789 NEXT_ARG(); 790 if (strcmp(*argv, "lock") == 0) { 791 mxlock |= (1<<RTAX_CWND); 792 NEXT_ARG(); 793 } 794 if (get_unsigned(&win, *argv, 0)) 795 invarg("\"cwnd\" value is invalid\n", *argv); 796 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win); 797 } else if (matches(*argv, "rttvar") == 0) { 798 unsigned win; 799 NEXT_ARG(); 800 if (strcmp(*argv, "lock") == 0) { 801 mxlock |= (1<<RTAX_RTTVAR); 802 NEXT_ARG(); 803 } 804 if (get_unsigned(&win, *argv, 0)) 805 invarg("\"rttvar\" value is invalid\n", *argv); 806 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR, win); 807 } else if (matches(*argv, "ssthresh") == 0) { 808 unsigned win; 809 NEXT_ARG(); 810 if (strcmp(*argv, "lock") == 0) { 811 mxlock |= (1<<RTAX_SSTHRESH); 812 NEXT_ARG(); 813 } 814 if (get_unsigned(&win, *argv, 0)) 815 invarg("\"ssthresh\" value is invalid\n", *argv); 816 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win); 817 } else if (matches(*argv, "realms") == 0) { 818 __u32 realm; 819 NEXT_ARG(); 820 if (get_rt_realms(&realm, *argv)) 821 invarg("\"realm\" value is invalid\n", *argv); 822 addattr32(&req.n, sizeof(req), RTA_FLOW, realm); 823 } else if (strcmp(*argv, "onlink") == 0) { 824 req.r.rtm_flags |= RTNH_F_ONLINK; 825 } else if (matches(*argv, "equalize") == 0 || 826 strcmp(*argv, "eql") == 0) { 827 req.r.rtm_flags |= RTM_F_EQUALIZE; 828 } else if (strcmp(*argv, "nexthop") == 0) { 829 nhs_ok = 1; 830 break; 831 } else if (matches(*argv, "protocol") == 0) { 832 __u32 prot; 833 NEXT_ARG(); 834 if (rtnl_rtprot_a2n(&prot, *argv)) 835 invarg("\"protocol\" value is invalid\n", *argv); 836 req.r.rtm_protocol = prot; 837 proto_ok =1; 838 } else if (matches(*argv, "table") == 0) { 839 __u32 tid; 840 NEXT_ARG(); 841 if (rtnl_rttable_a2n(&tid, *argv)) 842 invarg("\"table\" value is invalid\n", *argv); 843 req.r.rtm_table = tid; 844 table_ok = 1; 845 } else if (strcmp(*argv, "dev") == 0 || 846 strcmp(*argv, "oif") == 0) { 847 NEXT_ARG(); 848 d = *argv; 849 } else if (strcmp(*argv, "mpath") == 0 || 850 strcmp(*argv, "mp") == 0) { 851 int i; 852 __u32 mp_alg = IP_MP_ALG_NONE; 853 854 NEXT_ARG(); 855 for (i = 1; i < ARRAY_SIZE(mp_alg_names); i++) 856 if (strcmp(*argv, mp_alg_names[i]) == 0) 857 mp_alg = i; 858 if (mp_alg == IP_MP_ALG_NONE) 859 invarg("\"mpath\" value is invalid\n", *argv); 860 addattr_l(&req.n, sizeof(req), RTA_MP_ALGO, &mp_alg, sizeof(mp_alg)); 861 } else { 862 int type; 863 inet_prefix dst; 864 865 if (strcmp(*argv, "to") == 0) { 866 NEXT_ARG(); 867 } 868 if ((**argv < '0' || **argv > '9') && 869 rtnl_rtntype_a2n(&type, *argv) == 0) { 870 NEXT_ARG(); 871 req.r.rtm_type = type; 872 type_ok = 1; 873 } 874 875 if (matches(*argv, "help") == 0) 876 usage(); 877 if (dst_ok) 878 duparg2("to", *argv); 879 get_prefix(&dst, *argv, req.r.rtm_family); 880 if (req.r.rtm_family == AF_UNSPEC) 881 req.r.rtm_family = dst.family; 882 req.r.rtm_dst_len = dst.bitlen; 883 dst_ok = 1; 884 if (dst.bytelen) 885 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen); 886 } 887 argc--; argv++; 888 } 889 890 if (d || nhs_ok) { 891 int idx; 892 893 ll_init_map(&rth); 894 895 if (d) { 896 if ((idx = ll_name_to_index(d)) == 0) { 897 fprintf(stderr, "Cannot find device \"%s\"\n", d); 898 return -1; 899 } 900 addattr32(&req.n, sizeof(req), RTA_OIF, idx); 901 } 902 } 903 904 if (mxrta->rta_len > RTA_LENGTH(0)) { 905 if (mxlock) 906 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock); 907 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta)); 908 } 909 910 if (nhs_ok) 911 parse_nexthops(&req.n, &req.r, argc, argv); 912 913 if (!table_ok) { 914 if (req.r.rtm_type == RTN_LOCAL || 915 req.r.rtm_type == RTN_BROADCAST || 916 req.r.rtm_type == RTN_NAT || 917 req.r.rtm_type == RTN_ANYCAST) 918 req.r.rtm_table = RT_TABLE_LOCAL; 919 } 920 if (!scope_ok) { 921 if (req.r.rtm_type == RTN_LOCAL || 922 req.r.rtm_type == RTN_NAT) 923 req.r.rtm_scope = RT_SCOPE_HOST; 924 else if (req.r.rtm_type == RTN_BROADCAST || 925 req.r.rtm_type == RTN_MULTICAST || 926 req.r.rtm_type == RTN_ANYCAST) 927 req.r.rtm_scope = RT_SCOPE_LINK; 928 else if (req.r.rtm_type == RTN_UNICAST || 929 req.r.rtm_type == RTN_UNSPEC) { 930 if (cmd == RTM_DELROUTE) 931 req.r.rtm_scope = RT_SCOPE_NOWHERE; 932 else if (!gw_ok && !nhs_ok) 933 req.r.rtm_scope = RT_SCOPE_LINK; 934 } 935 } 936 937 if (req.r.rtm_family == AF_UNSPEC) 938 req.r.rtm_family = AF_INET; 939 940 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) 941 exit(2); 942 943 return 0; 944} 945 946static int rtnl_rtcache_request(struct rtnl_handle *rth, int family) 947{ 948 struct { 949 struct nlmsghdr nlh; 950 struct rtmsg rtm; 951 } req; 952 struct sockaddr_nl nladdr; 953 954 memset(&nladdr, 0, sizeof(nladdr)); 955 memset(&req, 0, sizeof(req)); 956 nladdr.nl_family = AF_NETLINK; 957 958 req.nlh.nlmsg_len = sizeof(req); 959 req.nlh.nlmsg_type = RTM_GETROUTE; 960 req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST; 961 req.nlh.nlmsg_pid = 0; 962 req.nlh.nlmsg_seq = rth->dump = ++rth->seq; 963 req.rtm.rtm_family = family; 964 req.rtm.rtm_flags |= RTM_F_CLONED; 965 966 return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr)); 967} 968 969static int iproute_flush_cache(void) 970{ 971#define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush" 972 973 int len; 974 int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY); 975 char *buffer = "-1"; 976 977 if (flush_fd < 0) { 978 fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH); 979 return -1; 980 } 981 982 len = strlen (buffer); 983 984 if ((write (flush_fd, (void *)buffer, len)) < len) { 985 fprintf (stderr, "Cannot flush routing cache\n"); 986 return -1; 987 } 988 close(flush_fd); 989 return 0; 990} 991 992 993static int iproute_list_or_flush(int argc, char **argv, int flush) 994{ 995 int do_ipv6 = preferred_family; 996 char *id = NULL; 997 char *od = NULL; 998 999 iproute_reset_filter(); 1000 filter.tb = RT_TABLE_MAIN; 1001 1002 if (flush && argc <= 0) { 1003 fprintf(stderr, "\"ip route flush\" requires arguments.\n"); 1004 return -1; 1005 } 1006 1007 while (argc > 0) { 1008 if (matches(*argv, "table") == 0) { 1009 __u32 tid; 1010 NEXT_ARG(); 1011 if (rtnl_rttable_a2n(&tid, *argv)) { 1012 if (strcmp(*argv, "all") == 0) { 1013 tid = 0; 1014 } else if (strcmp(*argv, "cache") == 0) { 1015 tid = -1; 1016 } else if (strcmp(*argv, "help") == 0) { 1017 usage(); 1018 } else { 1019 invarg("table id value is invalid\n", *argv); 1020 } 1021 } 1022 filter.tb = tid; 1023 } else if (matches(*argv, "cached") == 0 || 1024 matches(*argv, "cloned") == 0) { 1025 filter.tb = -1; 1026 } else if (strcmp(*argv, "tos") == 0 || 1027 matches(*argv, "dsfield") == 0) { 1028 __u32 tos; 1029 NEXT_ARG(); 1030 if (rtnl_dsfield_a2n(&tos, *argv)) 1031 invarg("TOS value is invalid\n", *argv); 1032 filter.tos = tos; 1033 filter.tosmask = -1; 1034 } else if (matches(*argv, "protocol") == 0) { 1035 __u32 prot = 0; 1036 NEXT_ARG(); 1037 filter.protocolmask = -1; 1038 if (rtnl_rtprot_a2n(&prot, *argv)) { 1039 if (strcmp(*argv, "all") != 0) 1040 invarg("invalid \"protocol\"\n", *argv); 1041 prot = 0; 1042 filter.protocolmask = 0; 1043 } 1044 filter.protocol = prot; 1045 } else if (matches(*argv, "scope") == 0) { 1046 __u32 scope = 0; 1047 NEXT_ARG(); 1048 filter.scopemask = -1; 1049 if (rtnl_rtscope_a2n(&scope, *argv)) { 1050 if (strcmp(*argv, "all") != 0) 1051 invarg("invalid \"scope\"\n", *argv); 1052 scope = RT_SCOPE_NOWHERE; 1053 filter.scopemask = 0; 1054 } 1055 filter.scope = scope; 1056 } else if (matches(*argv, "type") == 0) { 1057 int type; 1058 NEXT_ARG(); 1059 filter.typemask = -1; 1060 if (rtnl_rtntype_a2n(&type, *argv)) 1061 invarg("node type value is invalid\n", *argv); 1062 filter.type = type; 1063 } else if (strcmp(*argv, "dev") == 0 || 1064 strcmp(*argv, "oif") == 0) { 1065 NEXT_ARG(); 1066 od = *argv; 1067 } else if (strcmp(*argv, "iif") == 0) { 1068 NEXT_ARG(); 1069 id = *argv; 1070 } else if (strcmp(*argv, "via") == 0) { 1071 NEXT_ARG(); 1072 get_prefix(&filter.rvia, *argv, do_ipv6); 1073 } else if (strcmp(*argv, "src") == 0) { 1074 NEXT_ARG(); 1075 get_prefix(&filter.rprefsrc, *argv, do_ipv6); 1076 } else if (matches(*argv, "realms") == 0) { 1077 __u32 realm; 1078 NEXT_ARG(); 1079 if (get_rt_realms(&realm, *argv)) 1080 invarg("invalid realms\n", *argv); 1081 filter.realm = realm; 1082 filter.realmmask = ~0U; 1083 if ((filter.realm&0xFFFF) == 0 && 1084 (*argv)[strlen(*argv) - 1] == '/') 1085 filter.realmmask &= ~0xFFFF; 1086 if ((filter.realm&0xFFFF0000U) == 0 && 1087 (strchr(*argv, '/') == NULL || 1088 (*argv)[0] == '/')) 1089 filter.realmmask &= ~0xFFFF0000U; 1090 } else if (matches(*argv, "from") == 0) { 1091 NEXT_ARG(); 1092 if (matches(*argv, "root") == 0) { 1093 NEXT_ARG(); 1094 get_prefix(&filter.rsrc, *argv, do_ipv6); 1095 } else if (matches(*argv, "match") == 0) { 1096 NEXT_ARG(); 1097 get_prefix(&filter.msrc, *argv, do_ipv6); 1098 } else { 1099 if (matches(*argv, "exact") == 0) { 1100 NEXT_ARG(); 1101 } 1102 get_prefix(&filter.msrc, *argv, do_ipv6); 1103 filter.rsrc = filter.msrc; 1104 } 1105 } else { 1106 if (matches(*argv, "to") == 0) { 1107 NEXT_ARG(); 1108 } 1109 if (matches(*argv, "root") == 0) { 1110 NEXT_ARG(); 1111 get_prefix(&filter.rdst, *argv, do_ipv6); 1112 } else if (matches(*argv, "match") == 0) { 1113 NEXT_ARG(); 1114 get_prefix(&filter.mdst, *argv, do_ipv6); 1115 } else { 1116 if (matches(*argv, "exact") == 0) { 1117 NEXT_ARG(); 1118 } 1119 get_prefix(&filter.mdst, *argv, do_ipv6); 1120 filter.rdst = filter.mdst; 1121 } 1122 } 1123 argc--; argv++; 1124 } 1125 1126 if (do_ipv6 == AF_UNSPEC && filter.tb) 1127 do_ipv6 = AF_INET; 1128 1129 ll_init_map(&rth); 1130 1131 if (id || od) { 1132 int idx; 1133 1134 if (id) { 1135 if ((idx = ll_name_to_index(id)) == 0) { 1136 fprintf(stderr, "Cannot find device \"%s\"\n", id); 1137 return -1; 1138 } 1139 filter.iif = idx; 1140 filter.iifmask = -1; 1141 } 1142 if (od) { 1143 if ((idx = ll_name_to_index(od)) == 0) { 1144 fprintf(stderr, "Cannot find device \"%s\"\n", od); 1145 return -1; 1146 } 1147 filter.oif = idx; 1148 filter.oifmask = -1; 1149 } 1150 } 1151 1152 if (flush) { 1153 int round = 0; 1154 char flushb[4096-512]; 1155 time_t start = time(0); 1156 1157 if (filter.tb == -1) { 1158 if (do_ipv6 != AF_INET6) { 1159 iproute_flush_cache(); 1160 if (show_stats) 1161 printf("*** IPv4 routing cache is flushed.\n"); 1162 } 1163 if (do_ipv6 == AF_INET) 1164 return 0; 1165 } 1166 1167 filter.flushb = flushb; 1168 filter.flushp = 0; 1169 filter.flushe = sizeof(flushb); 1170 1171 for (;;) { 1172 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) { 1173 perror("Cannot send dump request"); 1174 exit(1); 1175 } 1176 filter.flushed = 0; 1177 if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) { 1178 fprintf(stderr, "Flush terminated\n"); 1179 exit(1); 1180 } 1181 if (filter.flushed == 0) { 1182 if (round == 0) { 1183 if (filter.tb != -1 || do_ipv6 == AF_INET6) 1184 fprintf(stderr, "Nothing to flush.\n"); 1185 } else if (show_stats) 1186 printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":""); 1187 fflush(stdout); 1188 return 0; 1189 } 1190 round++; 1191 if (flush_update() < 0) 1192 exit(1); 1193 1194 if (time(0) - start > 30) { 1195 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n", 1196 time(0) - start, filter.flushed); 1197 exit(1); 1198 } 1199 1200 if (show_stats) { 1201 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed); 1202 fflush(stdout); 1203 } 1204 } 1205 } 1206 1207 if (filter.tb != -1) { 1208 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) { 1209 perror("Cannot send dump request"); 1210 exit(1); 1211 } 1212 } else { 1213 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) { 1214 perror("Cannot send dump request"); 1215 exit(1); 1216 } 1217 } 1218 1219 if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) { 1220 fprintf(stderr, "Dump terminated\n"); 1221 exit(1); 1222 } 1223 1224 exit(0); 1225} 1226 1227 1228int iproute_get(int argc, char **argv) 1229{ 1230 struct { 1231 struct nlmsghdr n; 1232 struct rtmsg r; 1233 char buf[1024]; 1234 } req; 1235 char *idev = NULL; 1236 char *odev = NULL; 1237 int connected = 0; 1238 int from_ok = 0; 1239 1240 memset(&req, 0, sizeof(req)); 1241 1242 iproute_reset_filter(); 1243 1244 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); 1245 req.n.nlmsg_flags = NLM_F_REQUEST; 1246 req.n.nlmsg_type = RTM_GETROUTE; 1247 req.r.rtm_family = preferred_family; 1248 req.r.rtm_table = 0; 1249 req.r.rtm_protocol = 0; 1250 req.r.rtm_scope = 0; 1251 req.r.rtm_type = 0; 1252 req.r.rtm_src_len = 0; 1253 req.r.rtm_dst_len = 0; 1254 req.r.rtm_tos = 0; 1255 1256 while (argc > 0) { 1257 if (strcmp(*argv, "tos") == 0 || 1258 matches(*argv, "dsfield") == 0) { 1259 __u32 tos; 1260 NEXT_ARG(); 1261 if (rtnl_dsfield_a2n(&tos, *argv)) 1262 invarg("TOS value is invalid\n", *argv); 1263 req.r.rtm_tos = tos; 1264 } else if (matches(*argv, "from") == 0) { 1265 inet_prefix addr; 1266 NEXT_ARG(); 1267 if (matches(*argv, "help") == 0) 1268 usage(); 1269 from_ok = 1; 1270 get_prefix(&addr, *argv, req.r.rtm_family); 1271 if (req.r.rtm_family == AF_UNSPEC) 1272 req.r.rtm_family = addr.family; 1273 if (addr.bytelen) 1274 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen); 1275 req.r.rtm_src_len = addr.bitlen; 1276 } else if (matches(*argv, "iif") == 0) { 1277 NEXT_ARG(); 1278 idev = *argv; 1279 } else if (matches(*argv, "oif") == 0 || 1280 strcmp(*argv, "dev") == 0) { 1281 NEXT_ARG(); 1282 odev = *argv; 1283 } else if (matches(*argv, "notify") == 0) { 1284 req.r.rtm_flags |= RTM_F_NOTIFY; 1285 } else if (matches(*argv, "connected") == 0) { 1286 connected = 1; 1287 } else { 1288 inet_prefix addr; 1289 if (strcmp(*argv, "to") == 0) { 1290 NEXT_ARG(); 1291 } 1292 if (matches(*argv, "help") == 0) 1293 usage(); 1294 get_prefix(&addr, *argv, req.r.rtm_family); 1295 if (req.r.rtm_family == AF_UNSPEC) 1296 req.r.rtm_family = addr.family; 1297 if (addr.bytelen) 1298 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen); 1299 req.r.rtm_dst_len = addr.bitlen; 1300 } 1301 argc--; argv++; 1302 } 1303 1304 if (req.r.rtm_dst_len == 0) { 1305 fprintf(stderr, "need at least destination address\n"); 1306 exit(1); 1307 } 1308 1309 ll_init_map(&rth); 1310 1311 if (idev || odev) { 1312 int idx; 1313 1314 if (idev) { 1315 if ((idx = ll_name_to_index(idev)) == 0) { 1316 fprintf(stderr, "Cannot find device \"%s\"\n", idev); 1317 return -1; 1318 } 1319 addattr32(&req.n, sizeof(req), RTA_IIF, idx); 1320 } 1321 if (odev) { 1322 if ((idx = ll_name_to_index(odev)) == 0) { 1323 fprintf(stderr, "Cannot find device \"%s\"\n", odev); 1324 return -1; 1325 } 1326 addattr32(&req.n, sizeof(req), RTA_OIF, idx); 1327 } 1328 } 1329 1330 if (req.r.rtm_family == AF_UNSPEC) 1331 req.r.rtm_family = AF_INET; 1332 1333 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) 1334 exit(2); 1335 1336 if (connected && !from_ok) { 1337 struct rtmsg *r = NLMSG_DATA(&req.n); 1338 int len = req.n.nlmsg_len; 1339 struct rtattr * tb[RTA_MAX+1]; 1340 1341 if (print_route(NULL, &req.n, (void*)stdout) < 0) { 1342 fprintf(stderr, "An error :-)\n"); 1343 exit(1); 1344 } 1345 1346 if (req.n.nlmsg_type != RTM_NEWROUTE) { 1347 fprintf(stderr, "Not a route?\n"); 1348 return -1; 1349 } 1350 len -= NLMSG_LENGTH(sizeof(*r)); 1351 if (len < 0) { 1352 fprintf(stderr, "Wrong len %d\n", len); 1353 return -1; 1354 } 1355 1356 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len); 1357 1358 if (tb[RTA_PREFSRC]) { 1359 tb[RTA_PREFSRC]->rta_type = RTA_SRC; 1360 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]); 1361 } else if (!tb[RTA_SRC]) { 1362 fprintf(stderr, "Failed to connect the route\n"); 1363 return -1; 1364 } 1365 if (!odev && tb[RTA_OIF]) 1366 tb[RTA_OIF]->rta_type = 0; 1367 if (tb[RTA_GATEWAY]) 1368 tb[RTA_GATEWAY]->rta_type = 0; 1369 if (!idev && tb[RTA_IIF]) 1370 tb[RTA_IIF]->rta_type = 0; 1371 req.n.nlmsg_flags = NLM_F_REQUEST; 1372 req.n.nlmsg_type = RTM_GETROUTE; 1373 1374 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) 1375 exit(2); 1376 } 1377 1378 if (print_route(NULL, &req.n, (void*)stdout) < 0) { 1379 fprintf(stderr, "An error :-)\n"); 1380 exit(1); 1381 } 1382 1383 exit(0); 1384} 1385 1386void iproute_reset_filter() 1387{ 1388 memset(&filter, 0, sizeof(filter)); 1389 filter.mdst.bitlen = -1; 1390 filter.msrc.bitlen = -1; 1391} 1392 1393int do_iproute(int argc, char **argv) 1394{ 1395 if (argc < 1) 1396 return iproute_list_or_flush(0, NULL, 0); 1397 1398 if (matches(*argv, "add") == 0) 1399 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL, 1400 argc-1, argv+1); 1401 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0) 1402 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE, 1403 argc-1, argv+1); 1404 if (matches(*argv, "replace") == 0) 1405 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE, 1406 argc-1, argv+1); 1407 if (matches(*argv, "prepend") == 0) 1408 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE, 1409 argc-1, argv+1); 1410 if (matches(*argv, "append") == 0) 1411 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND, 1412 argc-1, argv+1); 1413 if (matches(*argv, "test") == 0) 1414 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL, 1415 argc-1, argv+1); 1416 if (matches(*argv, "delete") == 0) 1417 return iproute_modify(RTM_DELROUTE, 0, 1418 argc-1, argv+1); 1419 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 1420 || matches(*argv, "lst") == 0) 1421 return iproute_list_or_flush(argc-1, argv+1, 0); 1422 if (matches(*argv, "get") == 0) 1423 return iproute_get(argc-1, argv+1); 1424 if (matches(*argv, "flush") == 0) 1425 return iproute_list_or_flush(argc-1, argv+1, 1); 1426 if (matches(*argv, "help") == 0) 1427 usage(); 1428 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv); 1429 exit(-1); 1430} 1431 1432