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 (at) ms2.inr.ac.ru> 10 * 11 */ 12 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <unistd.h> 16 #include <syslog.h> 17 #include <fcntl.h> 18 #include <string.h> 19 #include <time.h> 20 #include <sys/time.h> 21 #include <sys/socket.h> 22 #include <netinet/in.h> 23 #include <netinet/ip.h> 24 #include <arpa/inet.h> 25 #include <linux/in_route.h> 26 27 #include "rt_names.h" 28 #include "utils.h" 29 #include "ip_common.h" 30 31 #ifndef RTAX_RTTVAR 32 #define RTAX_RTTVAR RTAX_HOPS 33 #endif 34 35 36 static const char *mx_names[RTAX_MAX+1] = { 37 [RTAX_MTU] = "mtu", 38 [RTAX_WINDOW] = "window", 39 [RTAX_RTT] = "rtt", 40 [RTAX_RTTVAR] = "rttvar", 41 [RTAX_SSTHRESH] = "ssthresh", 42 [RTAX_CWND] = "cwnd", 43 [RTAX_ADVMSS] = "advmss", 44 [RTAX_REORDERING]="reordering", 45 [RTAX_HOPLIMIT] = "hoplimit", 46 [RTAX_INITCWND] = "initcwnd", 47 [RTAX_FEATURES] = "features", 48 [RTAX_RTO_MIN] = "rto_min", 49 }; 50 static void usage(void) __attribute__((noreturn)); 51 52 static void usage(void) 53 { 54 fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n"); 55 fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n"); 56 fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n"); 57 fprintf(stderr, " ip route { add | del | change | append | replace | monitor } ROUTE\n"); 58 fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"); 59 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n"); 60 fprintf(stderr, " [ type TYPE ] [ scope SCOPE ]\n"); 61 fprintf(stderr, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"); 62 fprintf(stderr, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"); 63 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n"); 64 fprintf(stderr, " [ scope SCOPE ] [ metric METRIC ]\n"); 65 fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n"); 66 fprintf(stderr, "NH := [ via ADDRESS ] [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"); 67 fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ]\n"); 68 fprintf(stderr, " [ rtt TIME ] [ rttvar TIME ] [reordering NUMBER ]\n"); 69 fprintf(stderr, " [ window NUMBER] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"); 70 fprintf(stderr, " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"); 71 fprintf(stderr, " [ rto_min TIME ] [ hoplimit NUMBER ] \n"); 72 fprintf(stderr, "TYPE := [ unicast | local | broadcast | multicast | throw |\n"); 73 fprintf(stderr, " unreachable | prohibit | blackhole | nat ]\n"); 74 fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n"); 75 fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n"); 76 fprintf(stderr, "FLAGS := [ equalize ]\n"); 77 fprintf(stderr, "MP_ALGO := { rr | drr | random | wrandom }\n"); 78 fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n"); 79 fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n"); 80 fprintf(stderr, "TIME := NUMBER[s|ms|us|ns|j]\n"); 81 exit(-1); 82 } 83 84 85 static struct 86 { 87 int tb; 88 int cloned; 89 int flushed; 90 char *flushb; 91 int flushp; 92 int flushe; 93 int protocol, protocolmask; 94 int scope, scopemask; 95 int type, typemask; 96 int tos, tosmask; 97 int iif, iifmask; 98 int oif, oifmask; 99 int realm, realmmask; 100 inet_prefix rprefsrc; 101 inet_prefix rvia; 102 inet_prefix rdst; 103 inet_prefix mdst; 104 inet_prefix rsrc; 105 inet_prefix msrc; 106 } filter; 107 108 static int flush_update(void) 109 { 110 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) { 111 perror("Failed to send flush request"); 112 return -1; 113 } 114 filter.flushp = 0; 115 return 0; 116 } 117 118 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg) 119 { 120 FILE *fp = (FILE*)arg; 121 struct rtmsg *r = NLMSG_DATA(n); 122 int len = n->nlmsg_len; 123 struct rtattr * tb[RTA_MAX+1]; 124 char abuf[256]; 125 inet_prefix dst; 126 inet_prefix src; 127 inet_prefix prefsrc; 128 inet_prefix via; 129 int host_len = -1; 130 static int ip6_multiple_tables; 131 __u32 table; 132 SPRINT_BUF(b1); 133 static int hz; 134 135 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) { 136 fprintf(stderr, "Not a route: %08x %08x %08x\n", 137 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags); 138 return 0; 139 } 140 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE) 141 return 0; 142 len -= NLMSG_LENGTH(sizeof(*r)); 143 if (len < 0) { 144 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len); 145 return -1; 146 } 147 148 if (r->rtm_family == AF_INET6) 149 host_len = 128; 150 else if (r->rtm_family == AF_INET) 151 host_len = 32; 152 else if (r->rtm_family == AF_DECnet) 153 host_len = 16; 154 else if (r->rtm_family == AF_IPX) 155 host_len = 80; 156 157 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len); 158 table = rtm_get_table(r, tb); 159 160 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN) 161 ip6_multiple_tables = 1; 162 163 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) { 164 if (filter.cloned) { 165 if (!(r->rtm_flags&RTM_F_CLONED)) 166 return 0; 167 } 168 if (filter.tb) { 169 if (!filter.cloned && r->rtm_flags&RTM_F_CLONED) 170 return 0; 171 if (filter.tb == RT_TABLE_LOCAL) { 172 if (r->rtm_type != RTN_LOCAL) 173 return 0; 174 } else if (filter.tb == RT_TABLE_MAIN) { 175 if (r->rtm_type == RTN_LOCAL) 176 return 0; 177 } else { 178 return 0; 179 } 180 } 181 } else { 182 if (filter.cloned) { 183 if (!(r->rtm_flags&RTM_F_CLONED)) 184 return 0; 185 } 186 if (filter.tb > 0 && filter.tb != table) 187 return 0; 188 } 189 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask) 190 return 0; 191 if ((filter.scope^r->rtm_scope)&filter.scopemask) 192 return 0; 193 if ((filter.type^r->rtm_type)&filter.typemask) 194 return 0; 195 if ((filter.tos^r->rtm_tos)&filter.tosmask) 196 return 0; 197 if (filter.rdst.family && 198 (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len)) 199 return 0; 200 if (filter.mdst.family && 201 (r->rtm_family != filter.mdst.family || 202 (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len))) 203 return 0; 204 if (filter.rsrc.family && 205 (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len)) 206 return 0; 207 if (filter.msrc.family && 208 (r->rtm_family != filter.msrc.family || 209 (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len))) 210 return 0; 211 if (filter.rvia.family && r->rtm_family != filter.rvia.family) 212 return 0; 213 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family) 214 return 0; 215 216 memset(&dst, 0, sizeof(dst)); 217 dst.family = r->rtm_family; 218 if (tb[RTA_DST]) 219 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8); 220 if (filter.rsrc.family || filter.msrc.family) { 221 memset(&src, 0, sizeof(src)); 222 src.family = r->rtm_family; 223 if (tb[RTA_SRC]) 224 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8); 225 } 226 if (filter.rvia.bitlen>0) { 227 memset(&via, 0, sizeof(via)); 228 via.family = r->rtm_family; 229 if (tb[RTA_GATEWAY]) 230 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8); 231 } 232 if (filter.rprefsrc.bitlen>0) { 233 memset(&prefsrc, 0, sizeof(prefsrc)); 234 prefsrc.family = r->rtm_family; 235 if (tb[RTA_PREFSRC]) 236 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8); 237 } 238 239 if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen)) 240 return 0; 241 if (filter.mdst.family && filter.mdst.bitlen >= 0 && 242 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len)) 243 return 0; 244 245 if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen)) 246 return 0; 247 if (filter.msrc.family && filter.msrc.bitlen >= 0 && 248 inet_addr_match(&src, &filter.msrc, r->rtm_src_len)) 249 return 0; 250 251 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen)) 252 return 0; 253 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen)) 254 return 0; 255 if (filter.realmmask) { 256 __u32 realms = 0; 257 if (tb[RTA_FLOW]) 258 realms = *(__u32*)RTA_DATA(tb[RTA_FLOW]); 259 if ((realms^filter.realm)&filter.realmmask) 260 return 0; 261 } 262 if (filter.iifmask) { 263 int iif = 0; 264 if (tb[RTA_IIF]) 265 iif = *(int*)RTA_DATA(tb[RTA_IIF]); 266 if ((iif^filter.iif)&filter.iifmask) 267 return 0; 268 } 269 if (filter.oifmask) { 270 int oif = 0; 271 if (tb[RTA_OIF]) 272 oif = *(int*)RTA_DATA(tb[RTA_OIF]); 273 if ((oif^filter.oif)&filter.oifmask) 274 return 0; 275 } 276 if (filter.flushb && 277 r->rtm_family == AF_INET6 && 278 r->rtm_dst_len == 0 && 279 r->rtm_type == RTN_UNREACHABLE && 280 tb[RTA_PRIORITY] && 281 *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1) 282 return 0; 283 284 if (filter.flushb) { 285 struct nlmsghdr *fn; 286 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) { 287 if (flush_update()) 288 return -1; 289 } 290 fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp)); 291 memcpy(fn, n, n->nlmsg_len); 292 fn->nlmsg_type = RTM_DELROUTE; 293 fn->nlmsg_flags = NLM_F_REQUEST; 294 fn->nlmsg_seq = ++rth.seq; 295 filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb; 296 filter.flushed++; 297 if (show_stats < 2) 298 return 0; 299 } 300 301 if (n->nlmsg_type == RTM_DELROUTE) 302 fprintf(fp, "Deleted "); 303 if (r->rtm_type != RTN_UNICAST && !filter.type) 304 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1))); 305 306 if (tb[RTA_DST]) { 307 if (r->rtm_dst_len != host_len) { 308 fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family, 309 RTA_PAYLOAD(tb[RTA_DST]), 310 RTA_DATA(tb[RTA_DST]), 311 abuf, sizeof(abuf)), 312 r->rtm_dst_len 313 ); 314 } else { 315 fprintf(fp, "%s ", format_host(r->rtm_family, 316 RTA_PAYLOAD(tb[RTA_DST]), 317 RTA_DATA(tb[RTA_DST]), 318 abuf, sizeof(abuf)) 319 ); 320 } 321 } else if (r->rtm_dst_len) { 322 fprintf(fp, "0/%d ", r->rtm_dst_len); 323 } else { 324 fprintf(fp, "default "); 325 } 326 if (tb[RTA_SRC]) { 327 if (r->rtm_src_len != host_len) { 328 fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family, 329 RTA_PAYLOAD(tb[RTA_SRC]), 330 RTA_DATA(tb[RTA_SRC]), 331 abuf, sizeof(abuf)), 332 r->rtm_src_len 333 ); 334 } else { 335 fprintf(fp, "from %s ", format_host(r->rtm_family, 336 RTA_PAYLOAD(tb[RTA_SRC]), 337 RTA_DATA(tb[RTA_SRC]), 338 abuf, sizeof(abuf)) 339 ); 340 } 341 } else if (r->rtm_src_len) { 342 fprintf(fp, "from 0/%u ", r->rtm_src_len); 343 } 344 if (r->rtm_tos && filter.tosmask != -1) { 345 SPRINT_BUF(b1); 346 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1))); 347 } 348 349 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) { 350 fprintf(fp, "via %s ", 351 format_host(r->rtm_family, 352 RTA_PAYLOAD(tb[RTA_GATEWAY]), 353 RTA_DATA(tb[RTA_GATEWAY]), 354 abuf, sizeof(abuf))); 355 } 356 if (tb[RTA_OIF] && filter.oifmask != -1) 357 fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF]))); 358 359 if (!(r->rtm_flags&RTM_F_CLONED)) { 360 if (table != RT_TABLE_MAIN && !filter.tb) 361 fprintf(fp, " table %s ", rtnl_rttable_n2a(table, b1, sizeof(b1))); 362 if (r->rtm_protocol != RTPROT_BOOT && filter.protocolmask != -1) 363 fprintf(fp, " proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1))); 364 if (r->rtm_scope != RT_SCOPE_UNIVERSE && filter.scopemask != -1) 365 fprintf(fp, " scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1))); 366 } 367 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) { 368 /* Do not use format_host(). It is our local addr 369 and symbolic name will not be useful. 370 */ 371 fprintf(fp, " src %s ", 372 rt_addr_n2a(r->rtm_family, 373 RTA_PAYLOAD(tb[RTA_PREFSRC]), 374 RTA_DATA(tb[RTA_PREFSRC]), 375 abuf, sizeof(abuf))); 376 } 377 if (tb[RTA_PRIORITY]) 378 fprintf(fp, " metric %d ", *(__u32*)RTA_DATA(tb[RTA_PRIORITY])); 379 if (r->rtm_flags & RTNH_F_DEAD) 380 fprintf(fp, "dead "); 381 if (r->rtm_flags & RTNH_F_ONLINK) 382 fprintf(fp, "onlink "); 383 if (r->rtm_flags & RTNH_F_PERVASIVE) 384 fprintf(fp, "pervasive "); 385 if (r->rtm_flags & RTM_F_EQUALIZE) 386 fprintf(fp, "equalize "); 387 if (r->rtm_flags & RTM_F_NOTIFY) 388 fprintf(fp, "notify "); 389 390 if (tb[RTA_FLOW] && filter.realmmask != ~0U) { 391 __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]); 392 __u32 from = to>>16; 393 to &= 0xFFFF; 394 fprintf(fp, "realm%s ", from ? "s" : ""); 395 if (from) { 396 fprintf(fp, "%s/", 397 rtnl_rtrealm_n2a(from, b1, sizeof(b1))); 398 } 399 fprintf(fp, "%s ", 400 rtnl_rtrealm_n2a(to, b1, sizeof(b1))); 401 } 402 if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) { 403 __u32 flags = r->rtm_flags&~0xFFFF; 404 int first = 1; 405 406 fprintf(fp, "%s cache ", _SL_); 407 408 #define PRTFL(fl,flname) if (flags&RTCF_##fl) { \ 409 flags &= ~RTCF_##fl; \ 410 fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \ 411 first = 0; } 412 PRTFL(LOCAL, "local"); 413 PRTFL(REJECT, "reject"); 414 PRTFL(MULTICAST, "mc"); 415 PRTFL(BROADCAST, "brd"); 416 PRTFL(DNAT, "dst-nat"); 417 PRTFL(SNAT, "src-nat"); 418 PRTFL(MASQ, "masq"); 419 PRTFL(DIRECTDST, "dst-direct"); 420 PRTFL(DIRECTSRC, "src-direct"); 421 PRTFL(REDIRECTED, "redirected"); 422 PRTFL(DOREDIRECT, "redirect"); 423 PRTFL(FAST, "fastroute"); 424 PRTFL(NOTIFY, "notify"); 425 PRTFL(TPROXY, "proxy"); 426 #ifdef RTCF_EQUALIZE 427 PRTFL(EQUALIZE, "equalize"); 428 #endif 429 if (flags) 430 fprintf(fp, "%s%x> ", first ? "<" : "", flags); 431 if (tb[RTA_CACHEINFO]) { 432 struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]); 433 if (!hz) 434 hz = get_user_hz(); 435 if (ci->rta_expires != 0) 436 fprintf(fp, " expires %dsec", ci->rta_expires/hz); 437 if (ci->rta_error != 0) 438 fprintf(fp, " error %d", ci->rta_error); 439 if (show_stats) { 440 if (ci->rta_clntref) 441 fprintf(fp, " users %d", ci->rta_clntref); 442 if (ci->rta_used != 0) 443 fprintf(fp, " used %d", ci->rta_used); 444 if (ci->rta_lastuse != 0) 445 fprintf(fp, " age %dsec", ci->rta_lastuse/hz); 446 } 447 #ifdef RTNETLINK_HAVE_PEERINFO 448 if (ci->rta_id) 449 fprintf(fp, " ipid 0x%04x", ci->rta_id); 450 if (ci->rta_ts || ci->rta_tsage) 451 fprintf(fp, " ts 0x%x tsage %dsec", ci->rta_ts, ci->rta_tsage); 452 #endif 453 } 454 } else if (r->rtm_family == AF_INET6) { 455 struct rta_cacheinfo *ci = NULL; 456 if (tb[RTA_CACHEINFO]) 457 ci = RTA_DATA(tb[RTA_CACHEINFO]); 458 if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) { 459 if (!hz) 460 hz = get_user_hz(); 461 if (r->rtm_flags & RTM_F_CLONED) 462 fprintf(fp, "%s cache ", _SL_); 463 if (ci->rta_expires) 464 fprintf(fp, " expires %dsec", ci->rta_expires/hz); 465 if (ci->rta_error != 0) 466 fprintf(fp, " error %d", ci->rta_error); 467 if (show_stats) { 468 if (ci->rta_clntref) 469 fprintf(fp, " users %d", ci->rta_clntref); 470 if (ci->rta_used != 0) 471 fprintf(fp, " used %d", ci->rta_used); 472 if (ci->rta_lastuse != 0) 473 fprintf(fp, " age %dsec", ci->rta_lastuse/hz); 474 } 475 } else if (ci) { 476 if (ci->rta_error != 0) 477 fprintf(fp, " error %d", ci->rta_error); 478 } 479 } 480 if (tb[RTA_METRICS]) { 481 int i; 482 unsigned mxlock = 0; 483 struct rtattr *mxrta[RTAX_MAX+1]; 484 485 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]), 486 RTA_PAYLOAD(tb[RTA_METRICS])); 487 if (mxrta[RTAX_LOCK]) 488 mxlock = *(unsigned*)RTA_DATA(mxrta[RTAX_LOCK]); 489 490 for (i=2; i<= RTAX_MAX; i++) { 491 unsigned val; 492 493 if (mxrta[i] == NULL) 494 continue; 495 if (!hz) 496 hz = get_hz(); 497 498 if (i < sizeof(mx_names)/sizeof(char*) && mx_names[i]) 499 fprintf(fp, " %s", mx_names[i]); 500 else 501 fprintf(fp, " metric %d", i); 502 if (mxlock & (1<<i)) 503 fprintf(fp, " lock"); 504 505 val = *(unsigned*)RTA_DATA(mxrta[i]); 506 switch (i) { 507 case RTAX_HOPLIMIT: 508 if ((long)val == -1) 509 val = 0; 510 /* fall through */ 511 default: 512 fprintf(fp, " %u", val); 513 break; 514 515 case RTAX_RTT: 516 case RTAX_RTTVAR: 517 case RTAX_RTO_MIN: 518 val *= 1000; 519 if (i == RTAX_RTT) 520 val /= 8; 521 else if (i == RTAX_RTTVAR) 522 val /= 4; 523 524 if (val >= hz) 525 fprintf(fp, " %llums", 526 (unsigned long long) val / hz); 527 else 528 fprintf(fp, " %.2fms", 529 (double)val / hz); 530 } 531 } 532 } 533 if (tb[RTA_IIF] && filter.iifmask != -1) { 534 fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF]))); 535 } 536 if (tb[RTA_MULTIPATH]) { 537 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]); 538 int first = 0; 539 540 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]); 541 542 for (;;) { 543 if (len < sizeof(*nh)) 544 break; 545 if (nh->rtnh_len > len) 546 break; 547 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) { 548 if (first) 549 fprintf(fp, " Oifs:"); 550 else 551 fprintf(fp, " "); 552 } else 553 fprintf(fp, "%s\tnexthop", _SL_); 554 if (nh->rtnh_len > sizeof(*nh)) { 555 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh)); 556 if (tb[RTA_GATEWAY]) { 557 fprintf(fp, " via %s ", 558 format_host(r->rtm_family, 559 RTA_PAYLOAD(tb[RTA_GATEWAY]), 560 RTA_DATA(tb[RTA_GATEWAY]), 561 abuf, sizeof(abuf))); 562 } 563 if (tb[RTA_FLOW]) { 564 __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]); 565 __u32 from = to>>16; 566 to &= 0xFFFF; 567 fprintf(fp, " realm%s ", from ? "s" : ""); 568 if (from) { 569 fprintf(fp, "%s/", 570 rtnl_rtrealm_n2a(from, b1, sizeof(b1))); 571 } 572 fprintf(fp, "%s", 573 rtnl_rtrealm_n2a(to, b1, sizeof(b1))); 574 } 575 } 576 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) { 577 fprintf(fp, " %s", ll_index_to_name(nh->rtnh_ifindex)); 578 if (nh->rtnh_hops != 1) 579 fprintf(fp, "(ttl>%d)", nh->rtnh_hops); 580 } else { 581 fprintf(fp, " dev %s", ll_index_to_name(nh->rtnh_ifindex)); 582 fprintf(fp, " weight %d", nh->rtnh_hops+1); 583 } 584 if (nh->rtnh_flags & RTNH_F_DEAD) 585 fprintf(fp, " dead"); 586 if (nh->rtnh_flags & RTNH_F_ONLINK) 587 fprintf(fp, " onlink"); 588 if (nh->rtnh_flags & RTNH_F_PERVASIVE) 589 fprintf(fp, " pervasive"); 590 len -= NLMSG_ALIGN(nh->rtnh_len); 591 nh = RTNH_NEXT(nh); 592 } 593 } 594 fprintf(fp, "\n"); 595 fflush(fp); 596 return 0; 597 } 598 599 600 int parse_one_nh(struct rtattr *rta, struct rtnexthop *rtnh, int *argcp, char ***argvp) 601 { 602 int argc = *argcp; 603 char **argv = *argvp; 604 605 while (++argv, --argc > 0) { 606 if (strcmp(*argv, "via") == 0) { 607 NEXT_ARG(); 608 rta_addattr32(rta, 4096, RTA_GATEWAY, get_addr32(*argv)); 609 rtnh->rtnh_len += sizeof(struct rtattr) + 4; 610 } else if (strcmp(*argv, "dev") == 0) { 611 NEXT_ARG(); 612 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) { 613 fprintf(stderr, "Cannot find device \"%s\"\n", *argv); 614 exit(1); 615 } 616 } else if (strcmp(*argv, "weight") == 0) { 617 unsigned w; 618 NEXT_ARG(); 619 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256) 620 invarg("\"weight\" is invalid\n", *argv); 621 rtnh->rtnh_hops = w - 1; 622 } else if (strcmp(*argv, "onlink") == 0) { 623 rtnh->rtnh_flags |= RTNH_F_ONLINK; 624 } else if (matches(*argv, "realms") == 0) { 625 __u32 realm; 626 NEXT_ARG(); 627 if (get_rt_realms(&realm, *argv)) 628 invarg("\"realm\" value is invalid\n", *argv); 629 rta_addattr32(rta, 4096, RTA_FLOW, realm); 630 rtnh->rtnh_len += sizeof(struct rtattr) + 4; 631 } else 632 break; 633 } 634 *argcp = argc; 635 *argvp = argv; 636 return 0; 637 } 638 639 int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r, int argc, char **argv) 640 { 641 char buf[1024]; 642 struct rtattr *rta = (void*)buf; 643 struct rtnexthop *rtnh; 644 645 rta->rta_type = RTA_MULTIPATH; 646 rta->rta_len = RTA_LENGTH(0); 647 rtnh = RTA_DATA(rta); 648 649 while (argc > 0) { 650 if (strcmp(*argv, "nexthop") != 0) { 651 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv); 652 exit(-1); 653 } 654 if (argc <= 1) { 655 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n"); 656 exit(-1); 657 } 658 memset(rtnh, 0, sizeof(*rtnh)); 659 rtnh->rtnh_len = sizeof(*rtnh); 660 rta->rta_len += rtnh->rtnh_len; 661 parse_one_nh(rta, rtnh, &argc, &argv); 662 rtnh = RTNH_NEXT(rtnh); 663 } 664 665 if (rta->rta_len > RTA_LENGTH(0)) 666 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta)); 667 return 0; 668 } 669 670 671 int iproute_modify(int cmd, unsigned flags, int argc, char **argv) 672 { 673 struct { 674 struct nlmsghdr n; 675 struct rtmsg r; 676 char buf[1024]; 677 } req; 678 char mxbuf[256]; 679 struct rtattr * mxrta = (void*)mxbuf; 680 unsigned mxlock = 0; 681 char *d = NULL; 682 int gw_ok = 0; 683 int dst_ok = 0; 684 int nhs_ok = 0; 685 int scope_ok = 0; 686 int table_ok = 0; 687 int proto_ok = 0; 688 int type_ok = 0; 689 int raw = 0; 690 691 memset(&req, 0, sizeof(req)); 692 693 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); 694 req.n.nlmsg_flags = NLM_F_REQUEST|flags; 695 req.n.nlmsg_type = cmd; 696 req.r.rtm_family = preferred_family; 697 req.r.rtm_table = RT_TABLE_MAIN; 698 req.r.rtm_scope = RT_SCOPE_NOWHERE; 699 700 if (cmd != RTM_DELROUTE) { 701 req.r.rtm_protocol = RTPROT_BOOT; 702 req.r.rtm_scope = RT_SCOPE_UNIVERSE; 703 req.r.rtm_type = RTN_UNICAST; 704 } 705 706 mxrta->rta_type = RTA_METRICS; 707 mxrta->rta_len = RTA_LENGTH(0); 708 709 while (argc > 0) { 710 if (strcmp(*argv, "src") == 0) { 711 inet_prefix addr; 712 NEXT_ARG(); 713 get_addr(&addr, *argv, req.r.rtm_family); 714 if (req.r.rtm_family == AF_UNSPEC) 715 req.r.rtm_family = addr.family; 716 addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen); 717 } else if (strcmp(*argv, "via") == 0) { 718 inet_prefix addr; 719 gw_ok = 1; 720 NEXT_ARG(); 721 get_addr(&addr, *argv, req.r.rtm_family); 722 if (req.r.rtm_family == AF_UNSPEC) 723 req.r.rtm_family = addr.family; 724 addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen); 725 } else if (strcmp(*argv, "from") == 0) { 726 inet_prefix addr; 727 NEXT_ARG(); 728 get_prefix(&addr, *argv, req.r.rtm_family); 729 if (req.r.rtm_family == AF_UNSPEC) 730 req.r.rtm_family = addr.family; 731 if (addr.bytelen) 732 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen); 733 req.r.rtm_src_len = addr.bitlen; 734 } else if (strcmp(*argv, "tos") == 0 || 735 matches(*argv, "dsfield") == 0) { 736 __u32 tos; 737 NEXT_ARG(); 738 if (rtnl_dsfield_a2n(&tos, *argv)) 739 invarg("\"tos\" value is invalid\n", *argv); 740 req.r.rtm_tos = tos; 741 } else if (matches(*argv, "metric") == 0 || 742 matches(*argv, "priority") == 0 || 743 matches(*argv, "preference") == 0) { 744 __u32 metric; 745 NEXT_ARG(); 746 if (get_u32(&metric, *argv, 0)) 747 invarg("\"metric\" value is invalid\n", *argv); 748 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric); 749 } else if (strcmp(*argv, "scope") == 0) { 750 __u32 scope = 0; 751 NEXT_ARG(); 752 if (rtnl_rtscope_a2n(&scope, *argv)) 753 invarg("invalid \"scope\" value\n", *argv); 754 req.r.rtm_scope = scope; 755 scope_ok = 1; 756 } else if (strcmp(*argv, "mtu") == 0) { 757 unsigned mtu; 758 NEXT_ARG(); 759 if (strcmp(*argv, "lock") == 0) { 760 mxlock |= (1<<RTAX_MTU); 761 NEXT_ARG(); 762 } 763 if (get_unsigned(&mtu, *argv, 0)) 764 invarg("\"mtu\" value is invalid\n", *argv); 765 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu); 766 #ifdef RTAX_HOPLIMIT 767 } else if (strcmp(*argv, "hoplimit") == 0) { 768 unsigned hoplimit; 769 NEXT_ARG(); 770 if (strcmp(*argv, "lock") == 0) { 771 mxlock |= (1<<RTAX_HOPLIMIT); 772 NEXT_ARG(); 773 } 774 if (get_unsigned(&hoplimit, *argv, 0)) 775 invarg("\"hoplimit\" value is invalid\n", *argv); 776 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit); 777 #endif 778 #ifdef RTAX_ADVMSS 779 } else if (strcmp(*argv, "advmss") == 0) { 780 unsigned mss; 781 NEXT_ARG(); 782 if (strcmp(*argv, "lock") == 0) { 783 mxlock |= (1<<RTAX_ADVMSS); 784 NEXT_ARG(); 785 } 786 if (get_unsigned(&mss, *argv, 0)) 787 invarg("\"mss\" value is invalid\n", *argv); 788 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss); 789 #endif 790 #ifdef RTAX_REORDERING 791 } else if (matches(*argv, "reordering") == 0) { 792 unsigned reord; 793 NEXT_ARG(); 794 if (strcmp(*argv, "lock") == 0) { 795 mxlock |= (1<<RTAX_REORDERING); 796 NEXT_ARG(); 797 } 798 if (get_unsigned(&reord, *argv, 0)) 799 invarg("\"reordering\" value is invalid\n", *argv); 800 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord); 801 #endif 802 } else if (strcmp(*argv, "rtt") == 0) { 803 unsigned rtt; 804 NEXT_ARG(); 805 if (strcmp(*argv, "lock") == 0) { 806 mxlock |= (1<<RTAX_RTT); 807 NEXT_ARG(); 808 } 809 if (get_jiffies(&rtt, *argv, 0, &raw)) 810 invarg("\"rtt\" value is invalid\n", *argv); 811 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT, 812 (raw) ? rtt : rtt * 8); 813 } else if (strcmp(*argv, "rto_min") == 0) { 814 unsigned rto_min; 815 NEXT_ARG(); 816 mxlock |= (1<<RTAX_RTO_MIN); 817 if (get_jiffies(&rto_min, *argv, 0, &raw)) 818 invarg("\"rto_min\" value is invalid\n", 819 *argv); 820 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN, 821 rto_min); 822 } else if (matches(*argv, "window") == 0) { 823 unsigned win; 824 NEXT_ARG(); 825 if (strcmp(*argv, "lock") == 0) { 826 mxlock |= (1<<RTAX_WINDOW); 827 NEXT_ARG(); 828 } 829 if (get_unsigned(&win, *argv, 0)) 830 invarg("\"window\" value is invalid\n", *argv); 831 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win); 832 } else if (matches(*argv, "cwnd") == 0) { 833 unsigned win; 834 NEXT_ARG(); 835 if (strcmp(*argv, "lock") == 0) { 836 mxlock |= (1<<RTAX_CWND); 837 NEXT_ARG(); 838 } 839 if (get_unsigned(&win, *argv, 0)) 840 invarg("\"cwnd\" value is invalid\n", *argv); 841 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win); 842 } else if (matches(*argv, "initcwnd") == 0) { 843 unsigned win; 844 NEXT_ARG(); 845 if (strcmp(*argv, "lock") == 0) { 846 mxlock |= (1<<RTAX_INITCWND); 847 NEXT_ARG(); 848 } 849 if (get_unsigned(&win, *argv, 0)) 850 invarg("\"initcwnd\" value is invalid\n", *argv); 851 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITCWND, win); 852 } else if (matches(*argv, "rttvar") == 0) { 853 unsigned win; 854 NEXT_ARG(); 855 if (strcmp(*argv, "lock") == 0) { 856 mxlock |= (1<<RTAX_RTTVAR); 857 NEXT_ARG(); 858 } 859 if (get_jiffies(&win, *argv, 0, &raw)) 860 invarg("\"rttvar\" value is invalid\n", *argv); 861 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR, 862 (raw) ? win : win * 4); 863 } else if (matches(*argv, "ssthresh") == 0) { 864 unsigned win; 865 NEXT_ARG(); 866 if (strcmp(*argv, "lock") == 0) { 867 mxlock |= (1<<RTAX_SSTHRESH); 868 NEXT_ARG(); 869 } 870 if (get_unsigned(&win, *argv, 0)) 871 invarg("\"ssthresh\" value is invalid\n", *argv); 872 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win); 873 } else if (matches(*argv, "realms") == 0) { 874 __u32 realm; 875 NEXT_ARG(); 876 if (get_rt_realms(&realm, *argv)) 877 invarg("\"realm\" value is invalid\n", *argv); 878 addattr32(&req.n, sizeof(req), RTA_FLOW, realm); 879 } else if (strcmp(*argv, "onlink") == 0) { 880 req.r.rtm_flags |= RTNH_F_ONLINK; 881 } else if (matches(*argv, "equalize") == 0 || 882 strcmp(*argv, "eql") == 0) { 883 req.r.rtm_flags |= RTM_F_EQUALIZE; 884 } else if (strcmp(*argv, "nexthop") == 0) { 885 nhs_ok = 1; 886 break; 887 } else if (matches(*argv, "protocol") == 0) { 888 __u32 prot; 889 NEXT_ARG(); 890 if (rtnl_rtprot_a2n(&prot, *argv)) 891 invarg("\"protocol\" value is invalid\n", *argv); 892 req.r.rtm_protocol = prot; 893 proto_ok =1; 894 } else if (matches(*argv, "table") == 0) { 895 __u32 tid; 896 NEXT_ARG(); 897 if (rtnl_rttable_a2n(&tid, *argv)) 898 invarg("\"table\" value is invalid\n", *argv); 899 if (tid < 256) 900 req.r.rtm_table = tid; 901 else { 902 req.r.rtm_table = RT_TABLE_UNSPEC; 903 addattr32(&req.n, sizeof(req), RTA_TABLE, tid); 904 } 905 table_ok = 1; 906 } else if (strcmp(*argv, "dev") == 0 || 907 strcmp(*argv, "oif") == 0) { 908 NEXT_ARG(); 909 d = *argv; 910 } else { 911 int type; 912 inet_prefix dst; 913 914 if (strcmp(*argv, "to") == 0) { 915 NEXT_ARG(); 916 } 917 if ((**argv < '0' || **argv > '9') && 918 rtnl_rtntype_a2n(&type, *argv) == 0) { 919 NEXT_ARG(); 920 req.r.rtm_type = type; 921 type_ok = 1; 922 } 923 924 if (matches(*argv, "help") == 0) 925 usage(); 926 if (dst_ok) 927 duparg2("to", *argv); 928 get_prefix(&dst, *argv, req.r.rtm_family); 929 if (req.r.rtm_family == AF_UNSPEC) 930 req.r.rtm_family = dst.family; 931 req.r.rtm_dst_len = dst.bitlen; 932 dst_ok = 1; 933 if (dst.bytelen) 934 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen); 935 } 936 argc--; argv++; 937 } 938 939 if (d || nhs_ok) { 940 int idx; 941 942 ll_init_map(&rth); 943 944 if (d) { 945 if ((idx = ll_name_to_index(d)) == 0) { 946 fprintf(stderr, "Cannot find device \"%s\"\n", d); 947 return -1; 948 } 949 addattr32(&req.n, sizeof(req), RTA_OIF, idx); 950 } 951 } 952 953 if (mxrta->rta_len > RTA_LENGTH(0)) { 954 if (mxlock) 955 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock); 956 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta)); 957 } 958 959 if (nhs_ok) 960 parse_nexthops(&req.n, &req.r, argc, argv); 961 962 if (!table_ok) { 963 if (req.r.rtm_type == RTN_LOCAL || 964 req.r.rtm_type == RTN_BROADCAST || 965 req.r.rtm_type == RTN_NAT || 966 req.r.rtm_type == RTN_ANYCAST) 967 req.r.rtm_table = RT_TABLE_LOCAL; 968 } 969 if (!scope_ok) { 970 if (req.r.rtm_type == RTN_LOCAL || 971 req.r.rtm_type == RTN_NAT) 972 req.r.rtm_scope = RT_SCOPE_HOST; 973 else if (req.r.rtm_type == RTN_BROADCAST || 974 req.r.rtm_type == RTN_MULTICAST || 975 req.r.rtm_type == RTN_ANYCAST) 976 req.r.rtm_scope = RT_SCOPE_LINK; 977 else if (req.r.rtm_type == RTN_UNICAST || 978 req.r.rtm_type == RTN_UNSPEC) { 979 if (cmd == RTM_DELROUTE) 980 req.r.rtm_scope = RT_SCOPE_NOWHERE; 981 else if (!gw_ok && !nhs_ok) 982 req.r.rtm_scope = RT_SCOPE_LINK; 983 } 984 } 985 986 if (req.r.rtm_family == AF_UNSPEC) 987 req.r.rtm_family = AF_INET; 988 989 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0) 990 exit(2); 991 992 return 0; 993 } 994 995 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family) 996 { 997 struct { 998 struct nlmsghdr nlh; 999 struct rtmsg rtm; 1000 } req; 1001 struct sockaddr_nl nladdr; 1002 1003 memset(&nladdr, 0, sizeof(nladdr)); 1004 memset(&req, 0, sizeof(req)); 1005 nladdr.nl_family = AF_NETLINK; 1006 1007 req.nlh.nlmsg_len = sizeof(req); 1008 req.nlh.nlmsg_type = RTM_GETROUTE; 1009 req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST; 1010 req.nlh.nlmsg_pid = 0; 1011 req.nlh.nlmsg_seq = rth->dump = ++rth->seq; 1012 req.rtm.rtm_family = family; 1013 req.rtm.rtm_flags |= RTM_F_CLONED; 1014 1015 return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr)); 1016 } 1017 1018 static int iproute_flush_cache(void) 1019 { 1020 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush" 1021 1022 int len; 1023 int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY); 1024 char *buffer = "-1"; 1025 1026 if (flush_fd < 0) { 1027 fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH); 1028 return -1; 1029 } 1030 1031 len = strlen (buffer); 1032 1033 if ((write (flush_fd, (void *)buffer, len)) < len) { 1034 fprintf (stderr, "Cannot flush routing cache\n"); 1035 return -1; 1036 } 1037 close(flush_fd); 1038 return 0; 1039 } 1040 1041 1042 static int iproute_list_or_flush(int argc, char **argv, int flush) 1043 { 1044 int do_ipv6 = preferred_family; 1045 char *id = NULL; 1046 char *od = NULL; 1047 1048 iproute_reset_filter(); 1049 filter.tb = RT_TABLE_MAIN; 1050 1051 if (flush && argc <= 0) { 1052 fprintf(stderr, "\"ip route flush\" requires arguments.\n"); 1053 return -1; 1054 } 1055 1056 while (argc > 0) { 1057 if (matches(*argv, "table") == 0) { 1058 __u32 tid; 1059 NEXT_ARG(); 1060 if (rtnl_rttable_a2n(&tid, *argv)) { 1061 if (strcmp(*argv, "all") == 0) { 1062 filter.tb = 0; 1063 } else if (strcmp(*argv, "cache") == 0) { 1064 filter.cloned = 1; 1065 } else if (strcmp(*argv, "help") == 0) { 1066 usage(); 1067 } else { 1068 invarg("table id value is invalid\n", *argv); 1069 } 1070 } else 1071 filter.tb = tid; 1072 } else if (matches(*argv, "cached") == 0 || 1073 matches(*argv, "cloned") == 0) { 1074 filter.cloned = 1; 1075 } else if (strcmp(*argv, "tos") == 0 || 1076 matches(*argv, "dsfield") == 0) { 1077 __u32 tos; 1078 NEXT_ARG(); 1079 if (rtnl_dsfield_a2n(&tos, *argv)) 1080 invarg("TOS value is invalid\n", *argv); 1081 filter.tos = tos; 1082 filter.tosmask = -1; 1083 } else if (matches(*argv, "protocol") == 0) { 1084 __u32 prot = 0; 1085 NEXT_ARG(); 1086 filter.protocolmask = -1; 1087 if (rtnl_rtprot_a2n(&prot, *argv)) { 1088 if (strcmp(*argv, "all") != 0) 1089 invarg("invalid \"protocol\"\n", *argv); 1090 prot = 0; 1091 filter.protocolmask = 0; 1092 } 1093 filter.protocol = prot; 1094 } else if (matches(*argv, "scope") == 0) { 1095 __u32 scope = 0; 1096 NEXT_ARG(); 1097 filter.scopemask = -1; 1098 if (rtnl_rtscope_a2n(&scope, *argv)) { 1099 if (strcmp(*argv, "all") != 0) 1100 invarg("invalid \"scope\"\n", *argv); 1101 scope = RT_SCOPE_NOWHERE; 1102 filter.scopemask = 0; 1103 } 1104 filter.scope = scope; 1105 } else if (matches(*argv, "type") == 0) { 1106 int type; 1107 NEXT_ARG(); 1108 filter.typemask = -1; 1109 if (rtnl_rtntype_a2n(&type, *argv)) 1110 invarg("node type value is invalid\n", *argv); 1111 filter.type = type; 1112 } else if (strcmp(*argv, "dev") == 0 || 1113 strcmp(*argv, "oif") == 0) { 1114 NEXT_ARG(); 1115 od = *argv; 1116 } else if (strcmp(*argv, "iif") == 0) { 1117 NEXT_ARG(); 1118 id = *argv; 1119 } else if (strcmp(*argv, "via") == 0) { 1120 NEXT_ARG(); 1121 get_prefix(&filter.rvia, *argv, do_ipv6); 1122 } else if (strcmp(*argv, "src") == 0) { 1123 NEXT_ARG(); 1124 get_prefix(&filter.rprefsrc, *argv, do_ipv6); 1125 } else if (matches(*argv, "realms") == 0) { 1126 __u32 realm; 1127 NEXT_ARG(); 1128 if (get_rt_realms(&realm, *argv)) 1129 invarg("invalid realms\n", *argv); 1130 filter.realm = realm; 1131 filter.realmmask = ~0U; 1132 if ((filter.realm&0xFFFF) == 0 && 1133 (*argv)[strlen(*argv) - 1] == '/') 1134 filter.realmmask &= ~0xFFFF; 1135 if ((filter.realm&0xFFFF0000U) == 0 && 1136 (strchr(*argv, '/') == NULL || 1137 (*argv)[0] == '/')) 1138 filter.realmmask &= ~0xFFFF0000U; 1139 } else if (matches(*argv, "from") == 0) { 1140 NEXT_ARG(); 1141 if (matches(*argv, "root") == 0) { 1142 NEXT_ARG(); 1143 get_prefix(&filter.rsrc, *argv, do_ipv6); 1144 } else if (matches(*argv, "match") == 0) { 1145 NEXT_ARG(); 1146 get_prefix(&filter.msrc, *argv, do_ipv6); 1147 } else { 1148 if (matches(*argv, "exact") == 0) { 1149 NEXT_ARG(); 1150 } 1151 get_prefix(&filter.msrc, *argv, do_ipv6); 1152 filter.rsrc = filter.msrc; 1153 } 1154 } else { 1155 if (matches(*argv, "to") == 0) { 1156 NEXT_ARG(); 1157 } 1158 if (matches(*argv, "root") == 0) { 1159 NEXT_ARG(); 1160 get_prefix(&filter.rdst, *argv, do_ipv6); 1161 } else if (matches(*argv, "match") == 0) { 1162 NEXT_ARG(); 1163 get_prefix(&filter.mdst, *argv, do_ipv6); 1164 } else { 1165 if (matches(*argv, "exact") == 0) { 1166 NEXT_ARG(); 1167 } 1168 get_prefix(&filter.mdst, *argv, do_ipv6); 1169 filter.rdst = filter.mdst; 1170 } 1171 } 1172 argc--; argv++; 1173 } 1174 1175 if (do_ipv6 == AF_UNSPEC && filter.tb) 1176 do_ipv6 = AF_INET; 1177 1178 ll_init_map(&rth); 1179 1180 if (id || od) { 1181 int idx; 1182 1183 if (id) { 1184 if ((idx = ll_name_to_index(id)) == 0) { 1185 fprintf(stderr, "Cannot find device \"%s\"\n", id); 1186 return -1; 1187 } 1188 filter.iif = idx; 1189 filter.iifmask = -1; 1190 } 1191 if (od) { 1192 if ((idx = ll_name_to_index(od)) == 0) { 1193 fprintf(stderr, "Cannot find device \"%s\"\n", od); 1194 return -1; 1195 } 1196 filter.oif = idx; 1197 filter.oifmask = -1; 1198 } 1199 } 1200 1201 if (flush) { 1202 int round = 0; 1203 char flushb[4096-512]; 1204 time_t start = time(0); 1205 1206 if (filter.cloned) { 1207 if (do_ipv6 != AF_INET6) { 1208 iproute_flush_cache(); 1209 if (show_stats) 1210 printf("*** IPv4 routing cache is flushed.\n"); 1211 } 1212 if (do_ipv6 == AF_INET) 1213 return 0; 1214 } 1215 1216 filter.flushb = flushb; 1217 filter.flushp = 0; 1218 filter.flushe = sizeof(flushb); 1219 1220 for (;;) { 1221 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) { 1222 perror("Cannot send dump request"); 1223 exit(1); 1224 } 1225 filter.flushed = 0; 1226 if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) { 1227 fprintf(stderr, "Flush terminated\n"); 1228 exit(1); 1229 } 1230 if (filter.flushed == 0) { 1231 if (show_stats) { 1232 if (round == 0 && (!filter.cloned || do_ipv6 == AF_INET6)) 1233 printf("Nothing to flush.\n"); 1234 else 1235 printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":""); 1236 } 1237 fflush(stdout); 1238 return 0; 1239 } 1240 round++; 1241 if (flush_update() < 0) 1242 exit(1); 1243 1244 if (time(0) - start > 30) { 1245 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n", 1246 time(0) - start, filter.flushed); 1247 exit(1); 1248 } 1249 1250 if (show_stats) { 1251 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed); 1252 fflush(stdout); 1253 } 1254 } 1255 } 1256 1257 if (!filter.cloned) { 1258 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) { 1259 perror("Cannot send dump request"); 1260 exit(1); 1261 } 1262 } else { 1263 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) { 1264 perror("Cannot send dump request"); 1265 exit(1); 1266 } 1267 } 1268 1269 if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) { 1270 fprintf(stderr, "Dump terminated\n"); 1271 exit(1); 1272 } 1273 1274 exit(0); 1275 } 1276 1277 1278 int iproute_get(int argc, char **argv) 1279 { 1280 struct { 1281 struct nlmsghdr n; 1282 struct rtmsg r; 1283 char buf[1024]; 1284 } req; 1285 char *idev = NULL; 1286 char *odev = NULL; 1287 int connected = 0; 1288 int from_ok = 0; 1289 1290 memset(&req, 0, sizeof(req)); 1291 1292 iproute_reset_filter(); 1293 1294 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)); 1295 req.n.nlmsg_flags = NLM_F_REQUEST; 1296 req.n.nlmsg_type = RTM_GETROUTE; 1297 req.r.rtm_family = preferred_family; 1298 req.r.rtm_table = 0; 1299 req.r.rtm_protocol = 0; 1300 req.r.rtm_scope = 0; 1301 req.r.rtm_type = 0; 1302 req.r.rtm_src_len = 0; 1303 req.r.rtm_dst_len = 0; 1304 req.r.rtm_tos = 0; 1305 1306 while (argc > 0) { 1307 if (strcmp(*argv, "tos") == 0 || 1308 matches(*argv, "dsfield") == 0) { 1309 __u32 tos; 1310 NEXT_ARG(); 1311 if (rtnl_dsfield_a2n(&tos, *argv)) 1312 invarg("TOS value is invalid\n", *argv); 1313 req.r.rtm_tos = tos; 1314 } else if (matches(*argv, "from") == 0) { 1315 inet_prefix addr; 1316 NEXT_ARG(); 1317 if (matches(*argv, "help") == 0) 1318 usage(); 1319 from_ok = 1; 1320 get_prefix(&addr, *argv, req.r.rtm_family); 1321 if (req.r.rtm_family == AF_UNSPEC) 1322 req.r.rtm_family = addr.family; 1323 if (addr.bytelen) 1324 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen); 1325 req.r.rtm_src_len = addr.bitlen; 1326 } else if (matches(*argv, "iif") == 0) { 1327 NEXT_ARG(); 1328 idev = *argv; 1329 } else if (matches(*argv, "oif") == 0 || 1330 strcmp(*argv, "dev") == 0) { 1331 NEXT_ARG(); 1332 odev = *argv; 1333 } else if (matches(*argv, "notify") == 0) { 1334 req.r.rtm_flags |= RTM_F_NOTIFY; 1335 } else if (matches(*argv, "connected") == 0) { 1336 connected = 1; 1337 } else { 1338 inet_prefix addr; 1339 if (strcmp(*argv, "to") == 0) { 1340 NEXT_ARG(); 1341 } 1342 if (matches(*argv, "help") == 0) 1343 usage(); 1344 get_prefix(&addr, *argv, req.r.rtm_family); 1345 if (req.r.rtm_family == AF_UNSPEC) 1346 req.r.rtm_family = addr.family; 1347 if (addr.bytelen) 1348 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen); 1349 req.r.rtm_dst_len = addr.bitlen; 1350 } 1351 argc--; argv++; 1352 } 1353 1354 if (req.r.rtm_dst_len == 0) { 1355 fprintf(stderr, "need at least destination address\n"); 1356 exit(1); 1357 } 1358 1359 ll_init_map(&rth); 1360 1361 if (idev || odev) { 1362 int idx; 1363 1364 if (idev) { 1365 if ((idx = ll_name_to_index(idev)) == 0) { 1366 fprintf(stderr, "Cannot find device \"%s\"\n", idev); 1367 return -1; 1368 } 1369 addattr32(&req.n, sizeof(req), RTA_IIF, idx); 1370 } 1371 if (odev) { 1372 if ((idx = ll_name_to_index(odev)) == 0) { 1373 fprintf(stderr, "Cannot find device \"%s\"\n", odev); 1374 return -1; 1375 } 1376 addattr32(&req.n, sizeof(req), RTA_OIF, idx); 1377 } 1378 } 1379 1380 if (req.r.rtm_family == AF_UNSPEC) 1381 req.r.rtm_family = AF_INET; 1382 1383 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) 1384 exit(2); 1385 1386 if (connected && !from_ok) { 1387 struct rtmsg *r = NLMSG_DATA(&req.n); 1388 int len = req.n.nlmsg_len; 1389 struct rtattr * tb[RTA_MAX+1]; 1390 1391 if (print_route(NULL, &req.n, (void*)stdout) < 0) { 1392 fprintf(stderr, "An error :-)\n"); 1393 exit(1); 1394 } 1395 1396 if (req.n.nlmsg_type != RTM_NEWROUTE) { 1397 fprintf(stderr, "Not a route?\n"); 1398 return -1; 1399 } 1400 len -= NLMSG_LENGTH(sizeof(*r)); 1401 if (len < 0) { 1402 fprintf(stderr, "Wrong len %d\n", len); 1403 return -1; 1404 } 1405 1406 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len); 1407 1408 if (tb[RTA_PREFSRC]) { 1409 tb[RTA_PREFSRC]->rta_type = RTA_SRC; 1410 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]); 1411 } else if (!tb[RTA_SRC]) { 1412 fprintf(stderr, "Failed to connect the route\n"); 1413 return -1; 1414 } 1415 if (!odev && tb[RTA_OIF]) 1416 tb[RTA_OIF]->rta_type = 0; 1417 if (tb[RTA_GATEWAY]) 1418 tb[RTA_GATEWAY]->rta_type = 0; 1419 if (!idev && tb[RTA_IIF]) 1420 tb[RTA_IIF]->rta_type = 0; 1421 req.n.nlmsg_flags = NLM_F_REQUEST; 1422 req.n.nlmsg_type = RTM_GETROUTE; 1423 1424 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0) 1425 exit(2); 1426 } 1427 1428 if (print_route(NULL, &req.n, (void*)stdout) < 0) { 1429 fprintf(stderr, "An error :-)\n"); 1430 exit(1); 1431 } 1432 1433 exit(0); 1434 } 1435 1436 void iproute_reset_filter() 1437 { 1438 memset(&filter, 0, sizeof(filter)); 1439 filter.mdst.bitlen = -1; 1440 filter.msrc.bitlen = -1; 1441 } 1442 1443 int do_iproute(int argc, char **argv) 1444 { 1445 if (argc < 1) 1446 return iproute_list_or_flush(0, NULL, 0); 1447 1448 if (matches(*argv, "add") == 0) 1449 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL, 1450 argc-1, argv+1); 1451 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0) 1452 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE, 1453 argc-1, argv+1); 1454 if (matches(*argv, "replace") == 0) 1455 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE, 1456 argc-1, argv+1); 1457 if (matches(*argv, "prepend") == 0) 1458 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE, 1459 argc-1, argv+1); 1460 if (matches(*argv, "append") == 0) 1461 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND, 1462 argc-1, argv+1); 1463 if (matches(*argv, "test") == 0) 1464 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL, 1465 argc-1, argv+1); 1466 if (matches(*argv, "delete") == 0) 1467 return iproute_modify(RTM_DELROUTE, 0, 1468 argc-1, argv+1); 1469 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0 1470 || matches(*argv, "lst") == 0) 1471 return iproute_list_or_flush(argc-1, argv+1, 0); 1472 if (matches(*argv, "get") == 0) 1473 return iproute_get(argc-1, argv+1); 1474 if (matches(*argv, "flush") == 0) 1475 return iproute_list_or_flush(argc-1, argv+1, 1); 1476 if (matches(*argv, "help") == 0) 1477 usage(); 1478 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv); 1479 exit(-1); 1480 } 1481 1482
