2 * iproute.c "ip route".
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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
14 * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
15 * Kunihiro Ishiguro <kunihiro@zebra.org> 001102: rtnh_ifindex was not initialized
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>
35 #include "ip_common.h"
38 #define RTAX_RTTVAR RTAX_HOPS
42 static void usage(void) __attribute__((noreturn));
44 static void usage(void)
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");
83 int protocol, protocolmask;
98 static 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"
106 static int flush_update(void)
108 if (rtnl_send(&rth, filter.flushb, filter.flushp) < 0) {
109 perror("Failed to send flush request\n");
116 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
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];
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);
136 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
138 len -= NLMSG_LENGTH(sizeof(*r));
140 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
144 if (r->rtm_family == AF_INET6)
146 else if (r->rtm_family == AF_INET)
148 else if (r->rtm_family == AF_DECnet)
150 else if (r->rtm_family == AF_IPX)
153 if (r->rtm_family == AF_INET6) {
156 if (!(r->rtm_flags&RTM_F_CLONED))
159 if (r->rtm_flags&RTM_F_CLONED)
161 if (filter.tb == RT_TABLE_LOCAL) {
162 if (r->rtm_type != RTN_LOCAL)
164 } else if (filter.tb == RT_TABLE_MAIN) {
165 if (r->rtm_type == RTN_LOCAL)
173 if (filter.tb > 0 && filter.tb != r->rtm_table)
176 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
178 if ((filter.scope^r->rtm_scope)&filter.scopemask)
180 if ((filter.type^r->rtm_type)&filter.typemask)
182 if ((filter.tos^r->rtm_tos)&filter.tosmask)
184 if (filter.rdst.family &&
185 (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len))
187 if (filter.mdst.family &&
188 (r->rtm_family != filter.mdst.family ||
189 (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len)))
191 if (filter.rsrc.family &&
192 (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len))
194 if (filter.msrc.family &&
195 (r->rtm_family != filter.msrc.family ||
196 (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len)))
198 if (filter.rvia.family && r->rtm_family != filter.rvia.family)
200 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
203 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
205 memset(&dst, 0, sizeof(dst));
206 dst.family = r->rtm_family;
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;
213 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
215 if (filter.rvia.bitlen>0) {
216 memset(&via, 0, sizeof(via));
217 via.family = r->rtm_family;
219 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
221 if (filter.rprefsrc.bitlen>0) {
222 memset(&prefsrc, 0, sizeof(prefsrc));
223 prefsrc.family = r->rtm_family;
225 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
228 if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
230 if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
231 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
234 if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
236 if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
237 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
240 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
242 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
244 if (filter.realmmask) {
247 realms = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
248 if ((realms^filter.realm)&filter.realmmask)
251 if (filter.iifmask) {
254 iif = *(int*)RTA_DATA(tb[RTA_IIF]);
255 if ((iif^filter.iif)&filter.iifmask)
258 if (filter.oifmask) {
261 oif = *(int*)RTA_DATA(tb[RTA_OIF]);
262 if ((oif^filter.oif)&filter.oifmask)
266 r->rtm_family == AF_INET6 &&
267 r->rtm_dst_len == 0 &&
268 r->rtm_type == RTN_UNREACHABLE &&
270 *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1)
275 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
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;
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)));
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]),
304 fprintf(fp, "%s ", format_host(r->rtm_family,
305 RTA_PAYLOAD(tb[RTA_DST]),
306 RTA_DATA(tb[RTA_DST]),
310 } else if (r->rtm_dst_len) {
311 fprintf(fp, "0/%d ", r->rtm_dst_len);
313 fprintf(fp, "default ");
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]),
324 fprintf(fp, "from %s ", format_host(r->rtm_family,
325 RTA_PAYLOAD(tb[RTA_SRC]),
326 RTA_DATA(tb[RTA_SRC]),
330 } else if (r->rtm_src_len) {
331 fprintf(fp, "from 0/%u ", r->rtm_src_len);
333 if (r->rtm_tos && filter.tosmask != -1) {
335 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
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");
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)));
353 if (tb[RTA_OIF] && filter.oifmask != -1)
354 fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF])));
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)));
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.
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)));
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 ");
387 if (tb[RTA_FLOW] && filter.realmmask != ~0U) {
388 __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
391 fprintf(fp, "realm%s ", from ? "s" : "");
394 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
397 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
399 if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) {
400 __u32 flags = r->rtm_flags&~0xFFFF;
403 fprintf(fp, "%s cache ", _SL_);
405 #define PRTFL(fl,flname) if (flags&RTCF_##fl) { \
406 flags &= ~RTCF_##fl; \
407 fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
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");
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");
424 PRTFL(EQUALIZE, "equalize");
427 fprintf(fp, "%s%x> ", first ? "<" : "", flags);
428 if (tb[RTA_CACHEINFO]) {
429 struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]);
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);
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);
445 #ifdef RTNETLINK_HAVE_PEERINFO
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);
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)) {
460 if (r->rtm_flags & RTM_F_CLONED)
461 fprintf(fp, "%s cache ", _SL_);
463 fprintf(fp, " expires %dsec", ci->rta_expires/hz);
464 if (ci->rta_error != 0)
465 fprintf(fp, " error %d", ci->rta_error);
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);
475 if (ci->rta_error != 0)
476 fprintf(fp, " error %d", ci->rta_error);
479 if (tb[RTA_METRICS]) {
482 struct rtattr *mxrta[RTAX_MAX+1];
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]);
489 for (i=2; i<=RTAX_MAX; i++) {
490 static char *mx_names[] =
502 if (mxrta[i] == NULL)
506 if (i-2 < sizeof(mx_names)/sizeof(char*))
507 fprintf(fp, " %s", mx_names[i-2]);
509 fprintf(fp, " metric %d", i);
511 fprintf(fp, " lock");
513 if (i != RTAX_RTT && i != RTAX_RTTVAR)
514 fprintf(fp, " %u", *(unsigned*)RTA_DATA(mxrta[i]));
516 unsigned val = *(unsigned*)RTA_DATA(mxrta[i]);
524 fprintf(fp, " %ums", val/hz);
526 fprintf(fp, " %.2fms", (float)val/hz);
530 if (tb[RTA_IIF] && filter.iifmask != -1) {
531 fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF])));
533 if (tb[RTA_MULTIPATH]) {
534 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
537 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
540 if (len < sizeof(*nh))
542 if (nh->rtnh_len > len)
544 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
546 fprintf(fp, " Oifs:");
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)));
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);
566 fprintf(fp, " dev %s", ll_index_to_name(nh->rtnh_ifindex));
567 fprintf(fp, " weight %d", nh->rtnh_hops+1);
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);
585 int parse_one_nh(struct rtattr *rta, struct rtnexthop *rtnh, int *argcp, char ***argvp)
588 char **argv = *argvp;
590 while (++argv, --argc > 0) {
591 if (strcmp(*argv, "via") == 0) {
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) {
597 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
598 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
601 } else if (strcmp(*argv, "weight") == 0) {
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;
617 int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r, int argc, char **argv)
620 struct rtattr *rta = (void*)buf;
621 struct rtnexthop *rtnh;
623 rta->rta_type = RTA_MULTIPATH;
624 rta->rta_len = RTA_LENGTH(0);
625 rtnh = RTA_DATA(rta);
628 if (strcmp(*argv, "nexthop") != 0) {
629 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
633 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
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);
643 if (rta->rta_len > RTA_LENGTH(0))
644 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
649 int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
657 struct rtattr * mxrta = (void*)mxbuf;
668 memset(&req, 0, sizeof(req));
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;
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;
683 mxrta->rta_type = RTA_METRICS;
684 mxrta->rta_len = RTA_LENGTH(0);
687 if (strcmp(*argv, "src") == 0) {
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) {
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) {
705 get_prefix(&addr, *argv, req.r.rtm_family);
706 if (req.r.rtm_family == AF_UNSPEC)
707 req.r.rtm_family = addr.family;
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) {
715 if (rtnl_dsfield_a2n(&tos, *argv))
716 invarg("\"tos\" value is invalid\n", *argv);
718 } else if (matches(*argv, "metric") == 0 ||
719 matches(*argv, "priority") == 0 ||
720 matches(*argv, "preference") == 0) {
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) {
729 if (rtnl_rtscope_a2n(&scope, *argv))
730 invarg("invalid \"scope\" value\n", *argv);
731 req.r.rtm_scope = scope;
733 } else if (strcmp(*argv, "mtu") == 0) {
736 if (strcmp(*argv, "lock") == 0) {
737 mxlock |= (1<<RTAX_MTU);
740 if (get_unsigned(&mtu, *argv, 0))
741 invarg("\"mtu\" value is invalid\n", *argv);
742 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
744 } else if (strcmp(*argv, "advmss") == 0) {
747 if (strcmp(*argv, "lock") == 0) {
748 mxlock |= (1<<RTAX_ADVMSS);
751 if (get_unsigned(&mss, *argv, 0))
752 invarg("\"mss\" value is invalid\n", *argv);
753 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
755 #ifdef RTAX_REORDERING
756 } else if (matches(*argv, "reordering") == 0) {
759 if (strcmp(*argv, "lock") == 0) {
760 mxlock |= (1<<RTAX_REORDERING);
763 if (get_unsigned(&reord, *argv, 0))
764 invarg("\"reordering\" value is invalid\n", *argv);
765 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
767 } else if (strcmp(*argv, "rtt") == 0) {
770 if (strcmp(*argv, "lock") == 0) {
771 mxlock |= (1<<RTAX_RTT);
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) {
780 if (strcmp(*argv, "lock") == 0) {
781 mxlock |= (1<<RTAX_WINDOW);
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) {
790 if (strcmp(*argv, "lock") == 0) {
791 mxlock |= (1<<RTAX_CWND);
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) {
800 if (strcmp(*argv, "lock") == 0) {
801 mxlock |= (1<<RTAX_RTTVAR);
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) {
810 if (strcmp(*argv, "lock") == 0) {
811 mxlock |= (1<<RTAX_SSTHRESH);
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) {
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) {
831 } else if (matches(*argv, "protocol") == 0) {
834 if (rtnl_rtprot_a2n(&prot, *argv))
835 invarg("\"protocol\" value is invalid\n", *argv);
836 req.r.rtm_protocol = prot;
838 } else if (matches(*argv, "table") == 0) {
841 if (rtnl_rttable_a2n(&tid, *argv))
842 invarg("\"table\" value is invalid\n", *argv);
843 req.r.rtm_table = tid;
845 } else if (strcmp(*argv, "dev") == 0 ||
846 strcmp(*argv, "oif") == 0) {
849 } else if (strcmp(*argv, "mpath") == 0 ||
850 strcmp(*argv, "mp") == 0) {
852 __u32 mp_alg = IP_MP_ALG_NONE;
855 for (i = 1; i < ARRAY_SIZE(mp_alg_names); i++)
856 if (strcmp(*argv, mp_alg_names[i]) == 0)
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));
865 if (strcmp(*argv, "to") == 0) {
868 if ((**argv < '0' || **argv > '9') &&
869 rtnl_rtntype_a2n(&type, *argv) == 0) {
871 req.r.rtm_type = type;
875 if (matches(*argv, "help") == 0)
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;
885 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
896 if ((idx = ll_name_to_index(d)) == 0) {
897 fprintf(stderr, "Cannot find device \"%s\"\n", d);
900 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
904 if (mxrta->rta_len > RTA_LENGTH(0)) {
906 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
907 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
911 parse_nexthops(&req.n, &req.r, argc, argv);
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;
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;
937 if (req.r.rtm_family == AF_UNSPEC)
938 req.r.rtm_family = AF_INET;
940 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
946 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
952 struct sockaddr_nl nladdr;
954 memset(&nladdr, 0, sizeof(nladdr));
955 memset(&req, 0, sizeof(req));
956 nladdr.nl_family = AF_NETLINK;
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;
966 return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
969 static int iproute_flush_cache(void)
971 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
974 int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY);
978 fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH);
982 len = strlen (buffer);
984 if ((write (flush_fd, (void *)buffer, len)) < len) {
985 fprintf (stderr, "Cannot flush routing cache\n");
993 static int iproute_list_or_flush(int argc, char **argv, int flush)
995 int do_ipv6 = preferred_family;
999 iproute_reset_filter();
1000 filter.tb = RT_TABLE_MAIN;
1002 if (flush && argc <= 0) {
1003 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1008 if (matches(*argv, "table") == 0) {
1011 if (rtnl_rttable_a2n(&tid, *argv)) {
1012 if (strcmp(*argv, "all") == 0) {
1014 } else if (strcmp(*argv, "cache") == 0) {
1016 } else if (strcmp(*argv, "help") == 0) {
1019 invarg("table id value is invalid\n", *argv);
1023 } else if (matches(*argv, "cached") == 0 ||
1024 matches(*argv, "cloned") == 0) {
1026 } else if (strcmp(*argv, "tos") == 0 ||
1027 matches(*argv, "dsfield") == 0) {
1030 if (rtnl_dsfield_a2n(&tos, *argv))
1031 invarg("TOS value is invalid\n", *argv);
1033 filter.tosmask = -1;
1034 } else if (matches(*argv, "protocol") == 0) {
1037 filter.protocolmask = -1;
1038 if (rtnl_rtprot_a2n(&prot, *argv)) {
1039 if (strcmp(*argv, "all") != 0)
1040 invarg("invalid \"protocol\"\n", *argv);
1042 filter.protocolmask = 0;
1044 filter.protocol = prot;
1045 } else if (matches(*argv, "scope") == 0) {
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;
1055 filter.scope = scope;
1056 } else if (matches(*argv, "type") == 0) {
1059 filter.typemask = -1;
1060 if (rtnl_rtntype_a2n(&type, *argv))
1061 invarg("node type value is invalid\n", *argv);
1063 } else if (strcmp(*argv, "dev") == 0 ||
1064 strcmp(*argv, "oif") == 0) {
1067 } else if (strcmp(*argv, "iif") == 0) {
1070 } else if (strcmp(*argv, "via") == 0) {
1072 get_prefix(&filter.rvia, *argv, do_ipv6);
1073 } else if (strcmp(*argv, "src") == 0) {
1075 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1076 } else if (matches(*argv, "realms") == 0) {
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 ||
1089 filter.realmmask &= ~0xFFFF0000U;
1090 } else if (matches(*argv, "from") == 0) {
1092 if (matches(*argv, "root") == 0) {
1094 get_prefix(&filter.rsrc, *argv, do_ipv6);
1095 } else if (matches(*argv, "match") == 0) {
1097 get_prefix(&filter.msrc, *argv, do_ipv6);
1099 if (matches(*argv, "exact") == 0) {
1102 get_prefix(&filter.msrc, *argv, do_ipv6);
1103 filter.rsrc = filter.msrc;
1106 if (matches(*argv, "to") == 0) {
1109 if (matches(*argv, "root") == 0) {
1111 get_prefix(&filter.rdst, *argv, do_ipv6);
1112 } else if (matches(*argv, "match") == 0) {
1114 get_prefix(&filter.mdst, *argv, do_ipv6);
1116 if (matches(*argv, "exact") == 0) {
1119 get_prefix(&filter.mdst, *argv, do_ipv6);
1120 filter.rdst = filter.mdst;
1126 if (do_ipv6 == AF_UNSPEC && filter.tb)
1135 if ((idx = ll_name_to_index(id)) == 0) {
1136 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1140 filter.iifmask = -1;
1143 if ((idx = ll_name_to_index(od)) == 0) {
1144 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1148 filter.oifmask = -1;
1154 char flushb[4096-512];
1155 time_t start = time(0);
1157 if (filter.tb == -1) {
1158 if (do_ipv6 != AF_INET6) {
1159 iproute_flush_cache();
1161 printf("*** IPv4 routing cache is flushed.\n");
1163 if (do_ipv6 == AF_INET)
1167 filter.flushb = flushb;
1169 filter.flushe = sizeof(flushb);
1172 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1173 perror("Cannot send dump request");
1177 if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
1178 fprintf(stderr, "Flush terminated\n");
1181 if (filter.flushed == 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":"");
1191 if (flush_update() < 0)
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);
1201 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1207 if (filter.tb != -1) {
1208 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1209 perror("Cannot send dump request");
1213 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1214 perror("Cannot send dump request");
1219 if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
1220 fprintf(stderr, "Dump terminated\n");
1228 int iproute_get(int argc, char **argv)
1240 memset(&req, 0, sizeof(req));
1242 iproute_reset_filter();
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;
1252 req.r.rtm_src_len = 0;
1253 req.r.rtm_dst_len = 0;
1257 if (strcmp(*argv, "tos") == 0 ||
1258 matches(*argv, "dsfield") == 0) {
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) {
1267 if (matches(*argv, "help") == 0)
1270 get_prefix(&addr, *argv, req.r.rtm_family);
1271 if (req.r.rtm_family == AF_UNSPEC)
1272 req.r.rtm_family = addr.family;
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) {
1279 } else if (matches(*argv, "oif") == 0 ||
1280 strcmp(*argv, "dev") == 0) {
1283 } else if (matches(*argv, "notify") == 0) {
1284 req.r.rtm_flags |= RTM_F_NOTIFY;
1285 } else if (matches(*argv, "connected") == 0) {
1289 if (strcmp(*argv, "to") == 0) {
1292 if (matches(*argv, "help") == 0)
1294 get_prefix(&addr, *argv, req.r.rtm_family);
1295 if (req.r.rtm_family == AF_UNSPEC)
1296 req.r.rtm_family = addr.family;
1298 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1299 req.r.rtm_dst_len = addr.bitlen;
1304 if (req.r.rtm_dst_len == 0) {
1305 fprintf(stderr, "need at least destination address\n");
1315 if ((idx = ll_name_to_index(idev)) == 0) {
1316 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1319 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1322 if ((idx = ll_name_to_index(odev)) == 0) {
1323 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1326 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1330 if (req.r.rtm_family == AF_UNSPEC)
1331 req.r.rtm_family = AF_INET;
1333 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
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];
1341 if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1342 fprintf(stderr, "An error :-)\n");
1346 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1347 fprintf(stderr, "Not a route?\n");
1350 len -= NLMSG_LENGTH(sizeof(*r));
1352 fprintf(stderr, "Wrong len %d\n", len);
1356 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
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");
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;
1374 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1378 if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1379 fprintf(stderr, "An error :-)\n");
1386 void iproute_reset_filter()
1388 memset(&filter, 0, sizeof(filter));
1389 filter.mdst.bitlen = -1;
1390 filter.msrc.bitlen = -1;
1393 int do_iproute(int argc, char **argv)
1396 return iproute_list_or_flush(0, NULL, 0);
1398 if (matches(*argv, "add") == 0)
1399 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1401 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1402 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1404 if (matches(*argv, "replace") == 0)
1405 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1407 if (matches(*argv, "prepend") == 0)
1408 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1410 if (matches(*argv, "append") == 0)
1411 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
1413 if (matches(*argv, "test") == 0)
1414 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
1416 if (matches(*argv, "delete") == 0)
1417 return iproute_modify(RTM_DELROUTE, 0,
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)
1428 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);