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>
34 #include "ip_common.h"
37 #define RTAX_RTTVAR RTAX_HOPS
41 static void usage(void) __attribute__((noreturn));
43 static void usage(void)
45 fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n");
46 fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n");
47 fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n");
48 fprintf(stderr, " ip route { add | del | change | append | replace | monitor } ROUTE\n");
49 fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n");
50 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n");
51 fprintf(stderr, " [ type TYPE ] [ scope SCOPE ]\n");
52 fprintf(stderr, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n");
53 fprintf(stderr, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n");
54 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n");
55 fprintf(stderr, " [ scope SCOPE ] [ metric METRIC ]\n");
56 fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n");
57 fprintf(stderr, "NH := [ via ADDRESS ] [ dev STRING ] [ weight NUMBER ] NHFLAGS\n");
58 fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ]\n");
59 fprintf(stderr, " [ rtt NUMBER ] [ rttvar NUMBER ]\n");
60 fprintf(stderr, " [ window NUMBER] [ cwnd NUMBER ] [ ssthresh NUMBER ]\n");
61 fprintf(stderr, " [ realms REALM ]\n");
62 fprintf(stderr, "TYPE := [ unicast | local | broadcast | multicast | throw |\n");
63 fprintf(stderr, " unreachable | prohibit | blackhole | nat ]\n");
64 fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
65 fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n");
66 fprintf(stderr, "FLAGS := [ equalize ]\n");
67 fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n");
68 fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n");
80 struct rtnl_handle *rth;
81 int protocol, protocolmask;
96 static int flush_update(void)
98 if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
99 perror("Failed to send flush request\n");
106 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
108 FILE *fp = (FILE*)arg;
109 struct rtmsg *r = NLMSG_DATA(n);
110 int len = n->nlmsg_len;
111 struct rtattr * tb[RTA_MAX+1];
121 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
122 fprintf(stderr, "Not a route: %08x %08x %08x\n",
123 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
126 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
128 len -= NLMSG_LENGTH(sizeof(*r));
130 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
134 if (r->rtm_family == AF_INET6)
136 else if (r->rtm_family == AF_INET)
138 else if (r->rtm_family == AF_DECnet)
140 else if (r->rtm_family == AF_IPX)
143 if (r->rtm_family == AF_INET6) {
146 if (!(r->rtm_flags&RTM_F_CLONED))
149 if (r->rtm_flags&RTM_F_CLONED)
151 if (filter.tb == RT_TABLE_LOCAL) {
152 if (r->rtm_type != RTN_LOCAL)
154 } else if (filter.tb == RT_TABLE_MAIN) {
155 if (r->rtm_type == RTN_LOCAL)
163 if (filter.tb > 0 && filter.tb != r->rtm_table)
166 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
168 if ((filter.scope^r->rtm_scope)&filter.scopemask)
170 if ((filter.type^r->rtm_type)&filter.typemask)
172 if ((filter.tos^r->rtm_tos)&filter.tosmask)
174 if (filter.rdst.family &&
175 (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len))
177 if (filter.mdst.family &&
178 (r->rtm_family != filter.mdst.family ||
179 (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len)))
181 if (filter.rsrc.family &&
182 (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len))
184 if (filter.msrc.family &&
185 (r->rtm_family != filter.msrc.family ||
186 (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len)))
188 if (filter.rvia.family && r->rtm_family != filter.rvia.family)
190 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
193 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
195 memset(&dst, 0, sizeof(dst));
196 dst.family = r->rtm_family;
198 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
199 if (filter.rsrc.family || filter.msrc.family) {
200 memset(&src, 0, sizeof(src));
201 src.family = r->rtm_family;
203 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
205 if (filter.rvia.bitlen>0) {
206 memset(&via, 0, sizeof(via));
207 via.family = r->rtm_family;
209 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len);
211 if (filter.rprefsrc.bitlen>0) {
212 memset(&prefsrc, 0, sizeof(prefsrc));
213 prefsrc.family = r->rtm_family;
215 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len);
218 if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
220 if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
221 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
224 if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
226 if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
227 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
230 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
232 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
234 if (filter.realmmask) {
237 realms = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
238 if ((realms^filter.realm)&filter.realmmask)
241 if (filter.iifmask) {
244 iif = *(int*)RTA_DATA(tb[RTA_IIF]);
245 if ((iif^filter.iif)&filter.iifmask)
248 if (filter.oifmask) {
251 oif = *(int*)RTA_DATA(tb[RTA_OIF]);
252 if ((oif^filter.oif)&filter.oifmask)
256 r->rtm_family == AF_INET6 &&
257 r->rtm_dst_len == 0 &&
258 r->rtm_type == RTN_UNREACHABLE &&
260 *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1)
265 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
269 fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
270 memcpy(fn, n, n->nlmsg_len);
271 fn->nlmsg_type = RTM_DELROUTE;
272 fn->nlmsg_flags = NLM_F_REQUEST;
273 fn->nlmsg_seq = ++filter.rth->seq;
274 filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
280 if (n->nlmsg_type == RTM_DELROUTE)
281 fprintf(fp, "Deleted ");
282 if (r->rtm_type != RTN_UNICAST && !filter.type)
283 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
286 if (r->rtm_dst_len != host_len) {
287 fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family,
288 RTA_PAYLOAD(tb[RTA_DST]),
289 RTA_DATA(tb[RTA_DST]),
294 fprintf(fp, "%s ", format_host(r->rtm_family,
295 RTA_PAYLOAD(tb[RTA_DST]),
296 RTA_DATA(tb[RTA_DST]),
300 } else if (r->rtm_dst_len) {
301 fprintf(fp, "0/%d ", r->rtm_dst_len);
303 fprintf(fp, "default ");
306 if (r->rtm_src_len != host_len) {
307 fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
308 RTA_PAYLOAD(tb[RTA_SRC]),
309 RTA_DATA(tb[RTA_SRC]),
314 fprintf(fp, "from %s ", format_host(r->rtm_family,
315 RTA_PAYLOAD(tb[RTA_SRC]),
316 RTA_DATA(tb[RTA_SRC]),
320 } else if (r->rtm_src_len) {
321 fprintf(fp, "from 0/%u ", r->rtm_src_len);
323 if (r->rtm_tos && filter.tosmask != -1) {
325 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
327 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
328 fprintf(fp, "via %s ",
329 format_host(r->rtm_family,
330 RTA_PAYLOAD(tb[RTA_GATEWAY]),
331 RTA_DATA(tb[RTA_GATEWAY]),
332 abuf, sizeof(abuf)));
334 if (tb[RTA_OIF] && filter.oifmask != -1)
335 fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF])));
337 if (!(r->rtm_flags&RTM_F_CLONED)) {
338 if (r->rtm_table != RT_TABLE_MAIN && !filter.tb)
339 fprintf(fp, " table %s ", rtnl_rttable_n2a(r->rtm_table, b1, sizeof(b1)));
340 if (r->rtm_protocol != RTPROT_BOOT && filter.protocolmask != -1)
341 fprintf(fp, " proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1)));
342 if (r->rtm_scope != RT_SCOPE_UNIVERSE && filter.scopemask != -1)
343 fprintf(fp, " scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1)));
345 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
346 /* Do not use format_host(). It is our local addr
347 and symbolic name will not be useful.
349 fprintf(fp, " src %s ",
350 rt_addr_n2a(r->rtm_family,
351 RTA_PAYLOAD(tb[RTA_PREFSRC]),
352 RTA_DATA(tb[RTA_PREFSRC]),
353 abuf, sizeof(abuf)));
355 if (tb[RTA_PRIORITY])
356 fprintf(fp, " metric %d ", *(__u32*)RTA_DATA(tb[RTA_PRIORITY]));
357 if (r->rtm_flags & RTNH_F_DEAD)
358 fprintf(fp, "dead ");
359 if (r->rtm_flags & RTNH_F_ONLINK)
360 fprintf(fp, "onlink ");
361 if (r->rtm_flags & RTNH_F_PERVASIVE)
362 fprintf(fp, "pervasive ");
363 if (r->rtm_flags & RTM_F_EQUALIZE)
364 fprintf(fp, "equalize ");
365 if (r->rtm_flags & RTM_F_NOTIFY)
366 fprintf(fp, "notify ");
368 if (tb[RTA_FLOW] && filter.realmmask != ~0U) {
369 __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
372 fprintf(fp, "realm%s ", from ? "s" : "");
375 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
378 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
380 if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) {
381 __u32 flags = r->rtm_flags&~0xFFFF;
384 fprintf(fp, "%s cache ", _SL_);
386 #define PRTFL(fl,flname) if (flags&RTCF_##fl) { \
387 flags &= ~RTCF_##fl; \
388 fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
390 PRTFL(LOCAL, "local");
391 PRTFL(REJECT, "reject");
392 PRTFL(MULTICAST, "mc");
393 PRTFL(BROADCAST, "brd");
394 PRTFL(DNAT, "dst-nat");
395 PRTFL(SNAT, "src-nat");
397 PRTFL(DIRECTDST, "dst-direct");
398 PRTFL(DIRECTSRC, "src-direct");
399 PRTFL(REDIRECTED, "redirected");
400 PRTFL(DOREDIRECT, "redirect");
401 PRTFL(FAST, "fastroute");
402 PRTFL(NOTIFY, "notify");
403 PRTFL(TPROXY, "proxy");
405 PRTFL(EQUALIZE, "equalize");
408 fprintf(fp, "%s%x> ", first ? "<" : "", flags);
409 if (tb[RTA_CACHEINFO]) {
410 struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]);
414 if (ci->rta_expires != 0)
415 fprintf(fp, " expires %dsec", ci->rta_expires/hz);
416 if (ci->rta_error != 0)
417 fprintf(fp, " error %d", ci->rta_error);
420 fprintf(fp, " users %d", ci->rta_clntref);
421 if (ci->rta_used != 0)
422 fprintf(fp, " used %d", ci->rta_used);
423 if (ci->rta_lastuse != 0)
424 fprintf(fp, " age %dsec", ci->rta_lastuse/hz);
426 #ifdef RTNETLINK_HAVE_PEERINFO
428 fprintf(fp, " ipid 0x%04x", ci->rta_id);
429 if (ci->rta_ts || ci->rta_tsage)
430 fprintf(fp, " ts 0x%x tsage %dsec", ci->rta_ts, ci->rta_tsage);
433 } else if (r->rtm_family == AF_INET6) {
434 struct rta_cacheinfo *ci = NULL;
435 if (tb[RTA_CACHEINFO])
436 ci = RTA_DATA(tb[RTA_CACHEINFO]);
437 if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
441 if (r->rtm_flags & RTM_F_CLONED)
442 fprintf(fp, "%s cache ", _SL_);
444 fprintf(fp, " expires %dsec", ci->rta_expires/hz);
445 if (ci->rta_error != 0)
446 fprintf(fp, " error %d", ci->rta_error);
449 fprintf(fp, " users %d", ci->rta_clntref);
450 if (ci->rta_used != 0)
451 fprintf(fp, " used %d", ci->rta_used);
452 if (ci->rta_lastuse != 0)
453 fprintf(fp, " age %dsec", ci->rta_lastuse/hz);
456 if (ci->rta_error != 0)
457 fprintf(fp, " error %d", ci->rta_error);
460 if (tb[RTA_METRICS]) {
463 struct rtattr *mxrta[RTAX_MAX+1];
465 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]),
466 RTA_PAYLOAD(tb[RTA_METRICS]));
467 if (mxrta[RTAX_LOCK])
468 mxlock = *(unsigned*)RTA_DATA(mxrta[RTAX_LOCK]);
470 for (i=2; i<=RTAX_MAX; i++) {
471 static char *mx_names[] =
483 if (mxrta[i] == NULL)
487 if (i-2 < sizeof(mx_names)/sizeof(char*))
488 fprintf(fp, " %s", mx_names[i-2]);
490 fprintf(fp, " metric %d", i);
492 fprintf(fp, " lock");
494 if (i != RTAX_RTT && i != RTAX_RTTVAR)
495 fprintf(fp, " %u", *(unsigned*)RTA_DATA(mxrta[i]));
497 unsigned val = *(unsigned*)RTA_DATA(mxrta[i]);
505 fprintf(fp, " %ums", val/hz);
507 fprintf(fp, " %.2fms", (float)val/hz);
511 if (tb[RTA_IIF] && filter.iifmask != -1) {
512 fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF])));
514 if (tb[RTA_MULTIPATH]) {
515 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
518 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
521 if (len < sizeof(*nh))
523 if (nh->rtnh_len > len)
525 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
527 fprintf(fp, " Oifs:");
531 fprintf(fp, "%s\tnexthop", _SL_);
532 if (nh->rtnh_len > sizeof(*nh)) {
533 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh));
534 if (tb[RTA_GATEWAY]) {
535 fprintf(fp, " via %s ",
536 format_host(r->rtm_family,
537 RTA_PAYLOAD(tb[RTA_GATEWAY]),
538 RTA_DATA(tb[RTA_GATEWAY]),
539 abuf, sizeof(abuf)));
542 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
543 fprintf(fp, " %s", ll_index_to_name(nh->rtnh_ifindex));
544 if (nh->rtnh_hops != 1)
545 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
547 fprintf(fp, " dev %s", ll_index_to_name(nh->rtnh_ifindex));
548 fprintf(fp, " weight %d", nh->rtnh_hops+1);
550 if (nh->rtnh_flags & RTNH_F_DEAD)
551 fprintf(fp, " dead");
552 if (nh->rtnh_flags & RTNH_F_ONLINK)
553 fprintf(fp, " onlink");
554 if (nh->rtnh_flags & RTNH_F_PERVASIVE)
555 fprintf(fp, " pervasive");
556 len -= NLMSG_ALIGN(nh->rtnh_len);
566 int parse_one_nh(struct rtattr *rta, struct rtnexthop *rtnh, int *argcp, char ***argvp)
569 char **argv = *argvp;
571 while (++argv, --argc > 0) {
572 if (strcmp(*argv, "via") == 0) {
574 rta_addattr32(rta, 4096, RTA_GATEWAY, get_addr32(*argv));
575 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
576 } else if (strcmp(*argv, "dev") == 0) {
578 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
579 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
582 } else if (strcmp(*argv, "weight") == 0) {
585 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
586 invarg("\"weight\" is invalid\n", *argv);
587 rtnh->rtnh_hops = w - 1;
588 } else if (strcmp(*argv, "onlink") == 0) {
589 rtnh->rtnh_flags |= RTNH_F_ONLINK;
598 int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r, int argc, char **argv)
601 struct rtattr *rta = (void*)buf;
602 struct rtnexthop *rtnh;
604 rta->rta_type = RTA_MULTIPATH;
605 rta->rta_len = RTA_LENGTH(0);
606 rtnh = RTA_DATA(rta);
609 if (strcmp(*argv, "nexthop") != 0) {
610 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
614 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
617 memset(rtnh, 0, sizeof(*rtnh));
618 rtnh->rtnh_len = sizeof(*rtnh);
619 rta->rta_len += rtnh->rtnh_len;
620 parse_one_nh(rta, rtnh, &argc, &argv);
621 rtnh = RTNH_NEXT(rtnh);
624 if (rta->rta_len > RTA_LENGTH(0))
625 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
630 int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
632 struct rtnl_handle rth;
639 struct rtattr * mxrta = (void*)mxbuf;
650 memset(&req, 0, sizeof(req));
652 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
653 req.n.nlmsg_flags = NLM_F_REQUEST|flags;
654 req.n.nlmsg_type = cmd;
655 req.r.rtm_family = preferred_family;
656 req.r.rtm_table = RT_TABLE_MAIN;
657 req.r.rtm_scope = RT_SCOPE_NOWHERE;
659 if (cmd != RTM_DELROUTE) {
660 req.r.rtm_protocol = RTPROT_BOOT;
661 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
662 req.r.rtm_type = RTN_UNICAST;
665 mxrta->rta_type = RTA_METRICS;
666 mxrta->rta_len = RTA_LENGTH(0);
669 if (strcmp(*argv, "src") == 0) {
672 get_addr(&addr, *argv, req.r.rtm_family);
673 if (req.r.rtm_family == AF_UNSPEC)
674 req.r.rtm_family = addr.family;
675 addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
676 } else if (strcmp(*argv, "via") == 0) {
680 get_addr(&addr, *argv, req.r.rtm_family);
681 if (req.r.rtm_family == AF_UNSPEC)
682 req.r.rtm_family = addr.family;
683 addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen);
684 } else if (strcmp(*argv, "from") == 0) {
687 get_prefix(&addr, *argv, req.r.rtm_family);
688 if (req.r.rtm_family == AF_UNSPEC)
689 req.r.rtm_family = addr.family;
691 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
692 req.r.rtm_src_len = addr.bitlen;
693 } else if (strcmp(*argv, "tos") == 0 ||
694 matches(*argv, "dsfield") == 0) {
697 if (rtnl_dsfield_a2n(&tos, *argv))
698 invarg("\"tos\" value is invalid\n", *argv);
700 } else if (matches(*argv, "metric") == 0 ||
701 matches(*argv, "priority") == 0 ||
702 matches(*argv, "preference") == 0) {
705 if (get_u32(&metric, *argv, 0))
706 invarg("\"metric\" value is invalid\n", *argv);
707 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
708 } else if (strcmp(*argv, "scope") == 0) {
711 if (rtnl_rtscope_a2n(&scope, *argv))
712 invarg("invalid \"scope\" value\n", *argv);
713 req.r.rtm_scope = scope;
715 } else if (strcmp(*argv, "mtu") == 0) {
718 if (strcmp(*argv, "lock") == 0) {
719 mxlock |= (1<<RTAX_MTU);
722 if (get_unsigned(&mtu, *argv, 0))
723 invarg("\"mtu\" value is invalid\n", *argv);
724 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
726 } else if (strcmp(*argv, "advmss") == 0) {
729 if (strcmp(*argv, "lock") == 0) {
730 mxlock |= (1<<RTAX_ADVMSS);
733 if (get_unsigned(&mss, *argv, 0))
734 invarg("\"mss\" value is invalid\n", *argv);
735 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
737 #ifdef RTAX_REORDERING
738 } else if (matches(*argv, "reordering") == 0) {
741 if (strcmp(*argv, "lock") == 0) {
742 mxlock |= (1<<RTAX_REORDERING);
745 if (get_unsigned(&reord, *argv, 0))
746 invarg("\"reordering\" value is invalid\n", *argv);
747 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
749 } else if (strcmp(*argv, "rtt") == 0) {
752 if (strcmp(*argv, "lock") == 0) {
753 mxlock |= (1<<RTAX_RTT);
756 if (get_unsigned(&rtt, *argv, 0))
757 invarg("\"rtt\" value is invalid\n", *argv);
758 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT, rtt);
759 } else if (matches(*argv, "window") == 0) {
762 if (strcmp(*argv, "lock") == 0) {
763 mxlock |= (1<<RTAX_WINDOW);
766 if (get_unsigned(&win, *argv, 0))
767 invarg("\"window\" value is invalid\n", *argv);
768 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
769 } else if (matches(*argv, "cwnd") == 0) {
772 if (strcmp(*argv, "lock") == 0) {
773 mxlock |= (1<<RTAX_CWND);
776 if (get_unsigned(&win, *argv, 0))
777 invarg("\"cwnd\" value is invalid\n", *argv);
778 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
779 } else if (matches(*argv, "rttvar") == 0) {
782 if (strcmp(*argv, "lock") == 0) {
783 mxlock |= (1<<RTAX_RTTVAR);
786 if (get_unsigned(&win, *argv, 0))
787 invarg("\"rttvar\" value is invalid\n", *argv);
788 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR, win);
789 } else if (matches(*argv, "ssthresh") == 0) {
792 if (strcmp(*argv, "lock") == 0) {
793 mxlock |= (1<<RTAX_SSTHRESH);
796 if (get_unsigned(&win, *argv, 0))
797 invarg("\"ssthresh\" value is invalid\n", *argv);
798 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
799 } else if (matches(*argv, "realms") == 0) {
802 if (get_rt_realms(&realm, *argv))
803 invarg("\"realm\" value is invalid\n", *argv);
804 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
805 } else if (strcmp(*argv, "onlink") == 0) {
806 req.r.rtm_flags |= RTNH_F_ONLINK;
807 } else if (matches(*argv, "equalize") == 0 ||
808 strcmp(*argv, "eql") == 0) {
809 req.r.rtm_flags |= RTM_F_EQUALIZE;
810 } else if (strcmp(*argv, "nexthop") == 0) {
813 } else if (matches(*argv, "protocol") == 0) {
816 if (rtnl_rtprot_a2n(&prot, *argv))
817 invarg("\"protocol\" value is invalid\n", *argv);
818 req.r.rtm_protocol = prot;
820 } else if (matches(*argv, "table") == 0) {
823 if (rtnl_rttable_a2n(&tid, *argv))
824 invarg("\"table\" value is invalid\n", *argv);
825 req.r.rtm_table = tid;
827 } else if (strcmp(*argv, "dev") == 0 ||
828 strcmp(*argv, "oif") == 0) {
835 if (strcmp(*argv, "to") == 0) {
838 if ((**argv < '0' || **argv > '9') &&
839 rtnl_rtntype_a2n(&type, *argv) == 0) {
841 req.r.rtm_type = type;
845 if (matches(*argv, "help") == 0)
848 duparg2("to", *argv);
849 get_prefix(&dst, *argv, req.r.rtm_family);
850 if (req.r.rtm_family == AF_UNSPEC)
851 req.r.rtm_family = dst.family;
852 req.r.rtm_dst_len = dst.bitlen;
855 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
860 if (rtnl_open(&rth, 0) < 0)
869 if ((idx = ll_name_to_index(d)) == 0) {
870 fprintf(stderr, "Cannot find device \"%s\"\n", d);
873 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
877 if (mxrta->rta_len > RTA_LENGTH(0)) {
879 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
880 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
884 parse_nexthops(&req.n, &req.r, argc, argv);
887 if (req.r.rtm_type == RTN_LOCAL ||
888 req.r.rtm_type == RTN_BROADCAST ||
889 req.r.rtm_type == RTN_NAT ||
890 req.r.rtm_type == RTN_ANYCAST)
891 req.r.rtm_table = RT_TABLE_LOCAL;
894 if (req.r.rtm_type == RTN_LOCAL ||
895 req.r.rtm_type == RTN_NAT)
896 req.r.rtm_scope = RT_SCOPE_HOST;
897 else if (req.r.rtm_type == RTN_BROADCAST ||
898 req.r.rtm_type == RTN_MULTICAST ||
899 req.r.rtm_type == RTN_ANYCAST)
900 req.r.rtm_scope = RT_SCOPE_LINK;
901 else if (req.r.rtm_type == RTN_UNICAST ||
902 req.r.rtm_type == RTN_UNSPEC) {
903 if (cmd == RTM_DELROUTE)
904 req.r.rtm_scope = RT_SCOPE_NOWHERE;
905 else if (!gw_ok && !nhs_ok)
906 req.r.rtm_scope = RT_SCOPE_LINK;
910 if (req.r.rtm_family == AF_UNSPEC)
911 req.r.rtm_family = AF_INET;
913 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
919 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
925 struct sockaddr_nl nladdr;
927 memset(&nladdr, 0, sizeof(nladdr));
928 memset(&req, 0, sizeof(req));
929 nladdr.nl_family = AF_NETLINK;
931 req.nlh.nlmsg_len = sizeof(req);
932 req.nlh.nlmsg_type = RTM_GETROUTE;
933 req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST;
934 req.nlh.nlmsg_pid = 0;
935 req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
936 req.rtm.rtm_family = family;
937 req.rtm.rtm_flags |= RTM_F_CLONED;
939 return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
942 static int iproute_flush_cache(void)
944 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
947 int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY);
951 fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH);
955 len = strlen (buffer);
957 if ((write (flush_fd, (void *)buffer, len)) < len) {
958 fprintf (stderr, "Cannot flush routing cache\n");
966 static int iproute_list_or_flush(int argc, char **argv, int flush)
968 int do_ipv6 = preferred_family;
969 struct rtnl_handle rth;
973 iproute_reset_filter();
974 filter.tb = RT_TABLE_MAIN;
976 if (flush && argc <= 0) {
977 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
982 if (matches(*argv, "table") == 0) {
985 if (rtnl_rttable_a2n(&tid, *argv)) {
986 if (strcmp(*argv, "all") == 0) {
988 } else if (strcmp(*argv, "cache") == 0) {
990 } else if (strcmp(*argv, "help") == 0) {
993 invarg("table id value is invalid\n", *argv);
997 } else if (matches(*argv, "cached") == 0 ||
998 matches(*argv, "cloned") == 0) {
1000 } else if (strcmp(*argv, "tos") == 0 ||
1001 matches(*argv, "dsfield") == 0) {
1004 if (rtnl_dsfield_a2n(&tos, *argv))
1005 invarg("TOS value is invalid\n", *argv);
1007 filter.tosmask = -1;
1008 } else if (matches(*argv, "protocol") == 0) {
1011 filter.protocolmask = -1;
1012 if (rtnl_rtprot_a2n(&prot, *argv)) {
1013 if (strcmp(*argv, "all") != 0)
1014 invarg("invalid \"protocol\"\n", *argv);
1016 filter.protocolmask = 0;
1018 filter.protocol = prot;
1019 } else if (matches(*argv, "scope") == 0) {
1022 filter.scopemask = -1;
1023 if (rtnl_rtscope_a2n(&scope, *argv)) {
1024 if (strcmp(*argv, "all") != 0)
1025 invarg("invalid \"scope\"\n", *argv);
1026 scope = RT_SCOPE_NOWHERE;
1027 filter.scopemask = 0;
1029 filter.scope = scope;
1030 } else if (matches(*argv, "type") == 0) {
1033 filter.typemask = -1;
1034 if (rtnl_rtntype_a2n(&type, *argv))
1035 invarg("node type value is invalid\n", *argv);
1037 } else if (strcmp(*argv, "dev") == 0 ||
1038 strcmp(*argv, "oif") == 0) {
1041 } else if (strcmp(*argv, "iif") == 0) {
1044 } else if (strcmp(*argv, "via") == 0) {
1046 get_prefix(&filter.rvia, *argv, do_ipv6);
1047 } else if (strcmp(*argv, "src") == 0) {
1049 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1050 } else if (matches(*argv, "realms") == 0) {
1053 if (get_rt_realms(&realm, *argv))
1054 invarg("invalid realms\n", *argv);
1055 filter.realm = realm;
1056 filter.realmmask = ~0U;
1057 if ((filter.realm&0xFFFF) == 0 &&
1058 (*argv)[strlen(*argv) - 1] == '/')
1059 filter.realmmask &= ~0xFFFF;
1060 if ((filter.realm&0xFFFF0000U) == 0 &&
1061 (strchr(*argv, '/') == NULL ||
1063 filter.realmmask &= ~0xFFFF0000U;
1064 } else if (matches(*argv, "from") == 0) {
1066 if (matches(*argv, "root") == 0) {
1068 get_prefix(&filter.rsrc, *argv, do_ipv6);
1069 } else if (matches(*argv, "match") == 0) {
1071 get_prefix(&filter.msrc, *argv, do_ipv6);
1073 if (matches(*argv, "exact") == 0) {
1076 get_prefix(&filter.msrc, *argv, do_ipv6);
1077 filter.rsrc = filter.msrc;
1080 if (matches(*argv, "to") == 0) {
1083 if (matches(*argv, "root") == 0) {
1085 get_prefix(&filter.rdst, *argv, do_ipv6);
1086 } else if (matches(*argv, "match") == 0) {
1088 get_prefix(&filter.mdst, *argv, do_ipv6);
1090 if (matches(*argv, "exact") == 0) {
1093 get_prefix(&filter.mdst, *argv, do_ipv6);
1094 filter.rdst = filter.mdst;
1100 if (do_ipv6 == AF_UNSPEC && filter.tb)
1103 if (rtnl_open(&rth, 0) < 0)
1112 if ((idx = ll_name_to_index(id)) == 0) {
1113 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1117 filter.iifmask = -1;
1120 if ((idx = ll_name_to_index(od)) == 0) {
1121 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1125 filter.oifmask = -1;
1131 char flushb[4096-512];
1132 time_t start = time(0);
1134 if (filter.tb == -1) {
1135 if (do_ipv6 != AF_INET6) {
1136 iproute_flush_cache();
1138 printf("*** IPv4 routing cache is flushed.\n");
1140 if (do_ipv6 == AF_INET)
1144 filter.flushb = flushb;
1146 filter.flushe = sizeof(flushb);
1150 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1151 perror("Cannot send dump request");
1155 if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
1156 fprintf(stderr, "Flush terminated\n");
1159 if (filter.flushed == 0) {
1161 if (filter.tb != -1 || do_ipv6 == AF_INET6)
1162 fprintf(stderr, "Nothing to flush.\n");
1163 } else if (show_stats)
1164 printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":"");
1169 if (flush_update() < 0)
1172 if (time(0) - start > 30) {
1173 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1174 time(0) - start, filter.flushed);
1179 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1185 if (filter.tb != -1) {
1186 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1187 perror("Cannot send dump request");
1191 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1192 perror("Cannot send dump request");
1197 if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
1198 fprintf(stderr, "Dump terminated\n");
1206 int iproute_get(int argc, char **argv)
1208 struct rtnl_handle rth;
1219 memset(&req, 0, sizeof(req));
1221 iproute_reset_filter();
1223 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
1224 req.n.nlmsg_flags = NLM_F_REQUEST;
1225 req.n.nlmsg_type = RTM_GETROUTE;
1226 req.r.rtm_family = preferred_family;
1227 req.r.rtm_table = 0;
1228 req.r.rtm_protocol = 0;
1229 req.r.rtm_scope = 0;
1231 req.r.rtm_src_len = 0;
1232 req.r.rtm_dst_len = 0;
1236 if (strcmp(*argv, "tos") == 0 ||
1237 matches(*argv, "dsfield") == 0) {
1240 if (rtnl_dsfield_a2n(&tos, *argv))
1241 invarg("TOS value is invalid\n", *argv);
1242 req.r.rtm_tos = tos;
1243 } else if (matches(*argv, "from") == 0) {
1246 if (matches(*argv, "help") == 0)
1249 get_prefix(&addr, *argv, req.r.rtm_family);
1250 if (req.r.rtm_family == AF_UNSPEC)
1251 req.r.rtm_family = addr.family;
1253 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1254 req.r.rtm_src_len = addr.bitlen;
1255 } else if (matches(*argv, "iif") == 0) {
1258 } else if (matches(*argv, "oif") == 0 ||
1259 strcmp(*argv, "dev") == 0) {
1262 } else if (matches(*argv, "notify") == 0) {
1263 req.r.rtm_flags |= RTM_F_NOTIFY;
1264 } else if (matches(*argv, "connected") == 0) {
1268 if (strcmp(*argv, "to") == 0) {
1271 if (matches(*argv, "help") == 0)
1273 get_prefix(&addr, *argv, req.r.rtm_family);
1274 if (req.r.rtm_family == AF_UNSPEC)
1275 req.r.rtm_family = addr.family;
1277 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1278 req.r.rtm_dst_len = addr.bitlen;
1283 if (req.r.rtm_dst_len == 0) {
1284 fprintf(stderr, "need at least destination address\n");
1288 if (rtnl_open(&rth, 0) < 0)
1297 if ((idx = ll_name_to_index(idev)) == 0) {
1298 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1301 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1304 if ((idx = ll_name_to_index(odev)) == 0) {
1305 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1308 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1312 if (req.r.rtm_family == AF_UNSPEC)
1313 req.r.rtm_family = AF_INET;
1315 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1318 if (connected && !from_ok) {
1319 struct rtmsg *r = NLMSG_DATA(&req.n);
1320 int len = req.n.nlmsg_len;
1321 struct rtattr * tb[RTA_MAX+1];
1323 if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1324 fprintf(stderr, "An error :-)\n");
1328 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1329 fprintf(stderr, "Not a route?\n");
1332 len -= NLMSG_LENGTH(sizeof(*r));
1334 fprintf(stderr, "Wrong len %d\n", len);
1338 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1340 if (tb[RTA_PREFSRC]) {
1341 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1342 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1343 } else if (!tb[RTA_SRC]) {
1344 fprintf(stderr, "Failed to connect the route\n");
1347 if (!odev && tb[RTA_OIF])
1348 tb[RTA_OIF]->rta_type = 0;
1349 if (tb[RTA_GATEWAY])
1350 tb[RTA_GATEWAY]->rta_type = 0;
1351 if (!idev && tb[RTA_IIF])
1352 tb[RTA_IIF]->rta_type = 0;
1353 req.n.nlmsg_flags = NLM_F_REQUEST;
1354 req.n.nlmsg_type = RTM_GETROUTE;
1356 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1360 if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1361 fprintf(stderr, "An error :-)\n");
1368 void iproute_reset_filter()
1370 memset(&filter, 0, sizeof(filter));
1371 filter.mdst.bitlen = -1;
1372 filter.msrc.bitlen = -1;
1375 int do_iproute(int argc, char **argv)
1378 return iproute_list_or_flush(0, NULL, 0);
1380 if (matches(*argv, "add") == 0)
1381 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1383 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1384 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1386 if (matches(*argv, "replace") == 0)
1387 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1389 if (matches(*argv, "prepend") == 0)
1390 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1392 if (matches(*argv, "append") == 0)
1393 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
1395 if (matches(*argv, "test") == 0)
1396 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
1398 if (matches(*argv, "delete") == 0)
1399 return iproute_modify(RTM_DELROUTE, 0,
1401 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
1402 || matches(*argv, "lst") == 0)
1403 return iproute_list_or_flush(argc-1, argv+1, 0);
1404 if (matches(*argv, "get") == 0)
1405 return iproute_get(argc-1, argv+1);
1406 if (matches(*argv, "flush") == 0)
1407 return iproute_list_or_flush(argc-1, argv+1, 1);
1408 if (matches(*argv, "help") == 0)
1410 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);