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iproute2: Fix various manpage formatting nits
[mirror_iproute2.git] / ip / iproute.c
CommitLineData
aba5acdf
SH		 1/*
2 * iproute.c "ip route".
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
aba5acdf
SH		 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>
33551240 19#include <time.h>
aba5acdf
SH		 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>
f4ff11e3 26#include <errno.h>
aba5acdf
SH		 27
28#include "rt_names.h"
29#include "utils.h"
30#include "ip_common.h"
31
32#ifndef RTAX_RTTVAR
33#define RTAX_RTTVAR RTAX_HOPS
34#endif
35
f4ff11e3
DS		 36enum list_action {
37 IPROUTE_LIST,
38 IPROUTE_FLUSH,
39 IPROUTE_SAVE,
40};
f38c7334
SH		 41static const char *mx_names[RTAX_MAX+1] = {
42 [RTAX_MTU] = "mtu",
43 [RTAX_WINDOW] = "window",
44 [RTAX_RTT] = "rtt",
45 [RTAX_RTTVAR] = "rttvar",
46 [RTAX_SSTHRESH] = "ssthresh",
47 [RTAX_CWND] = "cwnd",
48 [RTAX_ADVMSS] = "advmss",
49 [RTAX_REORDERING]="reordering",
50 [RTAX_HOPLIMIT] = "hoplimit",
51 [RTAX_INITCWND] = "initcwnd",
52 [RTAX_FEATURES] = "features",
54e0b2e7 53 [RTAX_RTO_MIN] = "rto_min",
f5fd8003 54 [RTAX_INITRWND] = "initrwnd",
f38c7334 55};
aba5acdf
SH		 56static void usage(void) __attribute__((noreturn));
57
58static void usage(void)
59{
60 fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n");
f4ff11e3
DS		 61 fprintf(stderr, " ip route save SELECTOR\n");
62 fprintf(stderr, " ip route restore\n");
aba5acdf
SH		 63 fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n");
64 fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n");
b0373bfb 65 fprintf(stderr, " [ mark NUMBER ]\n");
c0c44bfe 66 fprintf(stderr, " ip route { add | del | change | append | replace } ROUTE\n");
aba5acdf
SH		 67 fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n");
68 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n");
69 fprintf(stderr, " [ type TYPE ] [ scope SCOPE ]\n");
70 fprintf(stderr, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n");
71 fprintf(stderr, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n");
72 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n");
73 fprintf(stderr, " [ scope SCOPE ] [ metric METRIC ]\n");
74 fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n");
75 fprintf(stderr, "NH := [ via ADDRESS ] [ dev STRING ] [ weight NUMBER ] NHFLAGS\n");
76 fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ]\n");
71e58151 77 fprintf(stderr, " [ rtt TIME ] [ rttvar TIME ] [reordering NUMBER ]\n");
a1f1143e 78 fprintf(stderr, " [ window NUMBER] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n");
576c63ee 79 fprintf(stderr, " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n");
f5fd8003 80 fprintf(stderr, " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n");
aba5acdf
SH		 81 fprintf(stderr, "TYPE := [ unicast | local | broadcast | multicast | throw |\n");
82 fprintf(stderr, " unreachable | prohibit | blackhole | nat ]\n");
83 fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
84 fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n");
aba5acdf
SH		 85 fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n");
86 fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n");
9b2cdc00 87 fprintf(stderr, "TIME := NUMBER[s|ms]\n");
aba5acdf
SH		 88 exit(-1);
89}
90
91
92static struct
93{
94 int tb;
bd4bcdad 95 int cloned;
aba5acdf
SH		 96 int flushed;
97 char *flushb;
98 int flushp;
99 int flushe;
aba5acdf
SH		 100 int protocol, protocolmask;
101 int scope, scopemask;
102 int type, typemask;
103 int tos, tosmask;
104 int iif, iifmask;
105 int oif, oifmask;
b0373bfb 106 int mark, markmask;
aba5acdf
SH		 107 int realm, realmmask;
108 inet_prefix rprefsrc;
109 inet_prefix rvia;
110 inet_prefix rdst;
111 inet_prefix mdst;
112 inet_prefix rsrc;
113 inet_prefix msrc;
114} filter;
115
116static int flush_update(void)
117{
f31a37f7 118 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
1fb0a998 119 perror("Failed to send flush request");
aba5acdf
SH		 120 return -1;
121 }
122 filter.flushp = 0;
123 return 0;
124}
125
f4ff11e3 126int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
aba5acdf 127{
aba5acdf 128 struct rtmsg *r = NLMSG_DATA(n);
aba5acdf
SH		 129 inet_prefix dst;
130 inet_prefix src;
aba5acdf 131 inet_prefix via;
f4ff11e3 132 inet_prefix prefsrc;
34e95647 133 __u32 table;
f4ff11e3 134 static int ip6_multiple_tables;
aba5acdf 135
34e95647
PM		 136 table = rtm_get_table(r, tb);
137
138 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
e0b29fe7
PM		 139 ip6_multiple_tables = 1;
140
44792827
UW		 141 if (filter.cloned == !(r->rtm_flags&RTM_F_CLONED))
142 return 0;
143
e0b29fe7 144 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
aba5acdf 145 if (filter.tb) {
bd4bcdad
PM		 146 if (filter.tb == RT_TABLE_LOCAL) {
147 if (r->rtm_type != RTN_LOCAL)
aba5acdf 148 return 0;
bd4bcdad
PM		 149 } else if (filter.tb == RT_TABLE_MAIN) {
150 if (r->rtm_type == RTN_LOCAL)
aba5acdf 151 return 0;
bd4bcdad
PM		 152 } else {
153 return 0;
aba5acdf
SH		 154 }
155 }
156 } else {
34e95647 157 if (filter.tb > 0 && filter.tb != table)
aba5acdf
SH		 158 return 0;
159 }
160 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
161 return 0;
162 if ((filter.scope^r->rtm_scope)&filter.scopemask)
163 return 0;
164 if ((filter.type^r->rtm_type)&filter.typemask)
165 return 0;
166 if ((filter.tos^r->rtm_tos)&filter.tosmask)
167 return 0;
168 if (filter.rdst.family &&
169 (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len))
170 return 0;
171 if (filter.mdst.family &&
172 (r->rtm_family != filter.mdst.family ||
173 (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len)))
174 return 0;
175 if (filter.rsrc.family &&
176 (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len))
177 return 0;
178 if (filter.msrc.family &&
179 (r->rtm_family != filter.msrc.family ||
180 (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len)))
181 return 0;
182 if (filter.rvia.family && r->rtm_family != filter.rvia.family)
183 return 0;
184 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
185 return 0;
186
aba5acdf
SH		 187 memset(&dst, 0, sizeof(dst));
188 dst.family = r->rtm_family;
189 if (tb[RTA_DST])
190 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
191 if (filter.rsrc.family || filter.msrc.family) {
192 memset(&src, 0, sizeof(src));
193 src.family = r->rtm_family;
194 if (tb[RTA_SRC])
195 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
196 }
197 if (filter.rvia.bitlen>0) {
198 memset(&via, 0, sizeof(via));
199 via.family = r->rtm_family;
200 if (tb[RTA_GATEWAY])
7849fb55 201 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
aba5acdf
SH		 202 }
203 if (filter.rprefsrc.bitlen>0) {
204 memset(&prefsrc, 0, sizeof(prefsrc));
205 prefsrc.family = r->rtm_family;
206 if (tb[RTA_PREFSRC])
7849fb55 207 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
aba5acdf
SH		 208 }
209
210 if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
211 return 0;
212 if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
213 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
214 return 0;
215
216 if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
217 return 0;
218 if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
219 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
220 return 0;
221
222 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
223 return 0;
224 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
225 return 0;
226 if (filter.realmmask) {
227 __u32 realms = 0;
228 if (tb[RTA_FLOW])
ff24746c 229 realms = rta_getattr_u32(tb[RTA_FLOW]);
aba5acdf
SH		 230 if ((realms^filter.realm)&filter.realmmask)
231 return 0;
232 }
233 if (filter.iifmask) {
234 int iif = 0;
235 if (tb[RTA_IIF])
236 iif = *(int*)RTA_DATA(tb[RTA_IIF]);
237 if ((iif^filter.iif)&filter.iifmask)
238 return 0;
239 }
240 if (filter.oifmask) {
241 int oif = 0;
242 if (tb[RTA_OIF])
243 oif = *(int*)RTA_DATA(tb[RTA_OIF]);
244 if ((oif^filter.oif)&filter.oifmask)
245 return 0;
246 }
b0373bfb
ED		 247 if (filter.markmask) {
248 int mark = 0;
249 if (tb[RTA_MARK])
250 mark = *(int *)RTA_DATA(tb[RTA_MARK]);
251 if ((mark ^ filter.mark) & filter.markmask)
252 return 0;
253 }
ae665a52 254 if (filter.flushb &&
aba5acdf
SH		 255 r->rtm_family == AF_INET6 &&
256 r->rtm_dst_len == 0 &&
257 r->rtm_type == RTN_UNREACHABLE &&
258 tb[RTA_PRIORITY] &&
259 *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1)
260 return 0;
261
f4ff11e3
DS		 262 return 1;
263}
264
265int calc_host_len(struct rtmsg *r)
266{
267 if (r->rtm_family == AF_INET6)
268 return 128;
269 else if (r->rtm_family == AF_INET)
270 return 32;
271 else if (r->rtm_family == AF_DECnet)
272 return 16;
273 else if (r->rtm_family == AF_IPX)
274 return 80;
275 else
276 return -1;
277}
278
279int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
280{
281 FILE *fp = (FILE*)arg;
282 struct rtmsg *r = NLMSG_DATA(n);
283 int len = n->nlmsg_len;
284 struct rtattr * tb[RTA_MAX+1];
285 char abuf[256];
286 int host_len = -1;
287 __u32 table;
288 SPRINT_BUF(b1);
289 static int hz;
290
291 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
292 fprintf(stderr, "Not a route: %08x %08x %08x\n",
293 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
294 return 0;
295 }
296 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
297 return 0;
298 len -= NLMSG_LENGTH(sizeof(*r));
299 if (len < 0) {
300 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
301 return -1;
302 }
303
304 host_len = calc_host_len(r);
305
306 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
307 table = rtm_get_table(r, tb);
308
309 if (!filter_nlmsg(n, tb, host_len))
310 return 0;
311
aba5acdf
SH		 312 if (filter.flushb) {
313 struct nlmsghdr *fn;
314 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
315 if (flush_update())
316 return -1;
317 }
318 fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
319 memcpy(fn, n, n->nlmsg_len);
320 fn->nlmsg_type = RTM_DELROUTE;
321 fn->nlmsg_flags = NLM_F_REQUEST;
351efcde 322 fn->nlmsg_seq = ++rth.seq;
aba5acdf
SH		 323 filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
324 filter.flushed++;
325 if (show_stats < 2)
326 return 0;
327 }
328
329 if (n->nlmsg_type == RTM_DELROUTE)
330 fprintf(fp, "Deleted ");
331 if (r->rtm_type != RTN_UNICAST && !filter.type)
332 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
333
334 if (tb[RTA_DST]) {
335 if (r->rtm_dst_len != host_len) {
336 fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family,
337 RTA_PAYLOAD(tb[RTA_DST]),
338 RTA_DATA(tb[RTA_DST]),
339 abuf, sizeof(abuf)),
340 r->rtm_dst_len
341 );
342 } else {
343 fprintf(fp, "%s ", format_host(r->rtm_family,
344 RTA_PAYLOAD(tb[RTA_DST]),
345 RTA_DATA(tb[RTA_DST]),
346 abuf, sizeof(abuf))
347 );
348 }
349 } else if (r->rtm_dst_len) {
350 fprintf(fp, "0/%d ", r->rtm_dst_len);
351 } else {
352 fprintf(fp, "default ");
353 }
354 if (tb[RTA_SRC]) {
355 if (r->rtm_src_len != host_len) {
356 fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
357 RTA_PAYLOAD(tb[RTA_SRC]),
358 RTA_DATA(tb[RTA_SRC]),
359 abuf, sizeof(abuf)),
360 r->rtm_src_len
361 );
362 } else {
363 fprintf(fp, "from %s ", format_host(r->rtm_family,
364 RTA_PAYLOAD(tb[RTA_SRC]),
365 RTA_DATA(tb[RTA_SRC]),
366 abuf, sizeof(abuf))
367 );
368 }
369 } else if (r->rtm_src_len) {
370 fprintf(fp, "from 0/%u ", r->rtm_src_len);
371 }
372 if (r->rtm_tos && filter.tosmask != -1) {
373 SPRINT_BUF(b1);
374 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
375 }
02d2ae55 376
aba5acdf 377 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
ae665a52 378 fprintf(fp, "via %s ",
aba5acdf
SH		 379 format_host(r->rtm_family,
380 RTA_PAYLOAD(tb[RTA_GATEWAY]),
381 RTA_DATA(tb[RTA_GATEWAY]),
382 abuf, sizeof(abuf)));
383 }
384 if (tb[RTA_OIF] && filter.oifmask != -1)
385 fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF])));
386
387 if (!(r->rtm_flags&RTM_F_CLONED)) {
34e95647
PM		 388 if (table != RT_TABLE_MAIN && !filter.tb)
389 fprintf(fp, " table %s ", rtnl_rttable_n2a(table, b1, sizeof(b1)));
aba5acdf
SH		 390 if (r->rtm_protocol != RTPROT_BOOT && filter.protocolmask != -1)
391 fprintf(fp, " proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1)));
392 if (r->rtm_scope != RT_SCOPE_UNIVERSE && filter.scopemask != -1)
393 fprintf(fp, " scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1)));
394 }
395 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
396 /* Do not use format_host(). It is our local addr
397 and symbolic name will not be useful.
398 */
ae665a52 399 fprintf(fp, " src %s ",
aba5acdf
SH		 400 rt_addr_n2a(r->rtm_family,
401 RTA_PAYLOAD(tb[RTA_PREFSRC]),
402 RTA_DATA(tb[RTA_PREFSRC]),
403 abuf, sizeof(abuf)));
404 }
405 if (tb[RTA_PRIORITY])
ff24746c 406 fprintf(fp, " metric %u ", rta_getattr_u32(tb[RTA_PRIORITY]));
aba5acdf
SH		 407 if (r->rtm_flags & RTNH_F_DEAD)
408 fprintf(fp, "dead ");
409 if (r->rtm_flags & RTNH_F_ONLINK)
410 fprintf(fp, "onlink ");
411 if (r->rtm_flags & RTNH_F_PERVASIVE)
412 fprintf(fp, "pervasive ");
aba5acdf
SH		 413 if (r->rtm_flags & RTM_F_NOTIFY)
414 fprintf(fp, "notify ");
b0373bfb
ED		 415 if (tb[RTA_MARK]) {
416 unsigned int mark = *(unsigned int*)RTA_DATA(tb[RTA_MARK]);
417 if (mark) {
418 if (mark >= 16)
419 fprintf(fp, " mark 0x%x", mark);
420 else
421 fprintf(fp, " mark %u", mark);
422 }
423 }
aba5acdf
SH		 424
425 if (tb[RTA_FLOW] && filter.realmmask != ~0U) {
ff24746c 426 __u32 to = rta_getattr_u32(tb[RTA_FLOW]);
aba5acdf
SH		 427 __u32 from = to>>16;
428 to &= 0xFFFF;
429 fprintf(fp, "realm%s ", from ? "s" : "");
430 if (from) {
431 fprintf(fp, "%s/",
432 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
433 }
434 fprintf(fp, "%s ",
435 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
436 }
437 if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) {
438 __u32 flags = r->rtm_flags&~0xFFFF;
439 int first = 1;
440
441 fprintf(fp, "%s cache ", _SL_);
442
443#define PRTFL(fl,flname) if (flags&RTCF_##fl) { \
444 flags &= ~RTCF_##fl; \
445 fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
446 first = 0; }
447 PRTFL(LOCAL, "local");
448 PRTFL(REJECT, "reject");
449 PRTFL(MULTICAST, "mc");
450 PRTFL(BROADCAST, "brd");
451 PRTFL(DNAT, "dst-nat");
452 PRTFL(SNAT, "src-nat");
453 PRTFL(MASQ, "masq");
454 PRTFL(DIRECTDST, "dst-direct");
455 PRTFL(DIRECTSRC, "src-direct");
456 PRTFL(REDIRECTED, "redirected");
457 PRTFL(DOREDIRECT, "redirect");
458 PRTFL(FAST, "fastroute");
459 PRTFL(NOTIFY, "notify");
460 PRTFL(TPROXY, "proxy");
63a0f20a 461
aba5acdf
SH		 462 if (flags)
463 fprintf(fp, "%s%x> ", first ? "<" : "", flags);
464 if (tb[RTA_CACHEINFO]) {
465 struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]);
aba5acdf 466 if (!hz)
5e8bc631 467 hz = get_user_hz();
aba5acdf
SH		 468 if (ci->rta_expires != 0)
469 fprintf(fp, " expires %dsec", ci->rta_expires/hz);
470 if (ci->rta_error != 0)
471 fprintf(fp, " error %d", ci->rta_error);
472 if (show_stats) {
473 if (ci->rta_clntref)
474 fprintf(fp, " users %d", ci->rta_clntref);
475 if (ci->rta_used != 0)
476 fprintf(fp, " used %d", ci->rta_used);
477 if (ci->rta_lastuse != 0)
478 fprintf(fp, " age %dsec", ci->rta_lastuse/hz);
479 }
aba5acdf
SH		 480 if (ci->rta_id)
481 fprintf(fp, " ipid 0x%04x", ci->rta_id);
482 if (ci->rta_ts || ci->rta_tsage)
d5b7420a
SH		 483 fprintf(fp, " ts 0x%x tsage %dsec",
484 ci->rta_ts, ci->rta_tsage);
aba5acdf
SH		 485 }
486 } else if (r->rtm_family == AF_INET6) {
487 struct rta_cacheinfo *ci = NULL;
488 if (tb[RTA_CACHEINFO])
489 ci = RTA_DATA(tb[RTA_CACHEINFO]);
490 if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
aba5acdf 491 if (!hz)
5e8bc631 492 hz = get_user_hz();
aba5acdf
SH		 493 if (r->rtm_flags & RTM_F_CLONED)
494 fprintf(fp, "%s cache ", _SL_);
495 if (ci->rta_expires)
496 fprintf(fp, " expires %dsec", ci->rta_expires/hz);
497 if (ci->rta_error != 0)
498 fprintf(fp, " error %d", ci->rta_error);
499 if (show_stats) {
500 if (ci->rta_clntref)
501 fprintf(fp, " users %d", ci->rta_clntref);
502 if (ci->rta_used != 0)
503 fprintf(fp, " used %d", ci->rta_used);
504 if (ci->rta_lastuse != 0)
505 fprintf(fp, " age %dsec", ci->rta_lastuse/hz);
506 }
507 } else if (ci) {
508 if (ci->rta_error != 0)
509 fprintf(fp, " error %d", ci->rta_error);
510 }
511 }
512 if (tb[RTA_METRICS]) {
513 int i;
514 unsigned mxlock = 0;
515 struct rtattr *mxrta[RTAX_MAX+1];
516
aba5acdf
SH		 517 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]),
518 RTA_PAYLOAD(tb[RTA_METRICS]));
519 if (mxrta[RTAX_LOCK])
520 mxlock = *(unsigned*)RTA_DATA(mxrta[RTAX_LOCK]);
521
f38c7334 522 for (i=2; i<= RTAX_MAX; i++) {
ced61d7d
SH		 523 unsigned val;
524
aba5acdf
SH		 525 if (mxrta[i] == NULL)
526 continue;
6a79240b
SH		 527
528 if (i < sizeof(mx_names)/sizeof(char*) && mx_names[i])
529 fprintf(fp, " %s", mx_names[i]);
aba5acdf 530 else
5e8bc631 531 fprintf(fp, " metric %d", i);
aba5acdf
SH		 532 if (mxlock & (1<<i))
533 fprintf(fp, " lock");
534
ced61d7d
SH		 535 val = *(unsigned*)RTA_DATA(mxrta[i]);
536 switch (i) {
537 case RTAX_HOPLIMIT:
62011a0b 538 if ((int)val == -1)
ced61d7d
SH		 539 val = 0;
540 /* fall through */
541 default:
542 fprintf(fp, " %u", val);
543 break;
aba5acdf 544
ced61d7d
SH		 545 case RTAX_RTT:
546 case RTAX_RTTVAR:
547 case RTAX_RTO_MIN:
aba5acdf
SH		 548 if (i == RTAX_RTT)
549 val /= 8;
54e0b2e7 550 else if (i == RTAX_RTTVAR)
aba5acdf 551 val /= 4;
ced61d7d 552
9b2cdc00
GR		 553 if (val >= 1000)
554 fprintf(fp, " %gs", val/1e3);
aba5acdf 555 else
9b2cdc00 556 fprintf(fp, " %ums", val);
aba5acdf
SH		 557 }
558 }
559 }
560 if (tb[RTA_IIF] && filter.iifmask != -1) {
561 fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF])));
562 }
563 if (tb[RTA_MULTIPATH]) {
564 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
565 int first = 0;
566
567 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
568
569 for (;;) {
570 if (len < sizeof(*nh))
571 break;
572 if (nh->rtnh_len > len)
573 break;
574 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
575 if (first)
576 fprintf(fp, " Oifs:");
577 else
578 fprintf(fp, " ");
579 } else
580 fprintf(fp, "%s\tnexthop", _SL_);
581 if (nh->rtnh_len > sizeof(*nh)) {
aba5acdf
SH		 582 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh));
583 if (tb[RTA_GATEWAY]) {
ae665a52 584 fprintf(fp, " via %s ",
aba5acdf
SH		 585 format_host(r->rtm_family,
586 RTA_PAYLOAD(tb[RTA_GATEWAY]),
587 RTA_DATA(tb[RTA_GATEWAY]),
588 abuf, sizeof(abuf)));
589 }
f4f6d640 590 if (tb[RTA_FLOW]) {
ff24746c 591 __u32 to = rta_getattr_u32(tb[RTA_FLOW]);
f4f6d640
PM		 592 __u32 from = to>>16;
593 to &= 0xFFFF;
594 fprintf(fp, " realm%s ", from ? "s" : "");
595 if (from) {
596 fprintf(fp, "%s/",
597 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
598 }
599 fprintf(fp, "%s",
600 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
601 }
aba5acdf
SH		 602 }
603 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
604 fprintf(fp, " %s", ll_index_to_name(nh->rtnh_ifindex));
605 if (nh->rtnh_hops != 1)
606 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
607 } else {
608 fprintf(fp, " dev %s", ll_index_to_name(nh->rtnh_ifindex));
609 fprintf(fp, " weight %d", nh->rtnh_hops+1);
610 }
611 if (nh->rtnh_flags & RTNH_F_DEAD)
612 fprintf(fp, " dead");
613 if (nh->rtnh_flags & RTNH_F_ONLINK)
614 fprintf(fp, " onlink");
615 if (nh->rtnh_flags & RTNH_F_PERVASIVE)
616 fprintf(fp, " pervasive");
617 len -= NLMSG_ALIGN(nh->rtnh_len);
618 nh = RTNH_NEXT(nh);
619 }
620 }
621 fprintf(fp, "\n");
622 fflush(fp);
623 return 0;
624}
625
626
627int parse_one_nh(struct rtattr *rta, struct rtnexthop *rtnh, int *argcp, char ***argvp)
628{
629 int argc = *argcp;
630 char **argv = *argvp;
631
632 while (++argv, --argc > 0) {
633 if (strcmp(*argv, "via") == 0) {
634 NEXT_ARG();
635 rta_addattr32(rta, 4096, RTA_GATEWAY, get_addr32(*argv));
636 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
637 } else if (strcmp(*argv, "dev") == 0) {
638 NEXT_ARG();
639 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
640 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
641 exit(1);
642 }
643 } else if (strcmp(*argv, "weight") == 0) {
644 unsigned w;
645 NEXT_ARG();
646 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
647 invarg("\"weight\" is invalid\n", *argv);
648 rtnh->rtnh_hops = w - 1;
649 } else if (strcmp(*argv, "onlink") == 0) {
650 rtnh->rtnh_flags |= RTNH_F_ONLINK;
f4f6d640
PM		 651 } else if (matches(*argv, "realms") == 0) {
652 __u32 realm;
653 NEXT_ARG();
654 if (get_rt_realms(&realm, *argv))
655 invarg("\"realm\" value is invalid\n", *argv);
656 rta_addattr32(rta, 4096, RTA_FLOW, realm);
657 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
aba5acdf
SH		 658 } else
659 break;
660 }
661 *argcp = argc;
662 *argvp = argv;
663 return 0;
664}
665
666int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r, int argc, char **argv)
667{
668 char buf[1024];
669 struct rtattr *rta = (void*)buf;
670 struct rtnexthop *rtnh;
671
672 rta->rta_type = RTA_MULTIPATH;
673 rta->rta_len = RTA_LENGTH(0);
674 rtnh = RTA_DATA(rta);
675
676 while (argc > 0) {
677 if (strcmp(*argv, "nexthop") != 0) {
678 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
679 exit(-1);
680 }
681 if (argc <= 1) {
682 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
683 exit(-1);
684 }
685 memset(rtnh, 0, sizeof(*rtnh));
686 rtnh->rtnh_len = sizeof(*rtnh);
687 rta->rta_len += rtnh->rtnh_len;
688 parse_one_nh(rta, rtnh, &argc, &argv);
689 rtnh = RTNH_NEXT(rtnh);
690 }
691
692 if (rta->rta_len > RTA_LENGTH(0))
693 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
694 return 0;
695}
696
697
698int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
699{
aba5acdf
SH		 700 struct {
701 struct nlmsghdr n;
702 struct rtmsg r;
703 char buf[1024];
704 } req;
705 char mxbuf[256];
706 struct rtattr * mxrta = (void*)mxbuf;
707 unsigned mxlock = 0;
708 char *d = NULL;
709 int gw_ok = 0;
710 int dst_ok = 0;
711 int nhs_ok = 0;
712 int scope_ok = 0;
713 int table_ok = 0;
54e0b2e7 714 int raw = 0;
aba5acdf
SH		 715
716 memset(&req, 0, sizeof(req));
717
718 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
719 req.n.nlmsg_flags = NLM_F_REQUEST|flags;
720 req.n.nlmsg_type = cmd;
721 req.r.rtm_family = preferred_family;
722 req.r.rtm_table = RT_TABLE_MAIN;
723 req.r.rtm_scope = RT_SCOPE_NOWHERE;
724
725 if (cmd != RTM_DELROUTE) {
726 req.r.rtm_protocol = RTPROT_BOOT;
727 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
728 req.r.rtm_type = RTN_UNICAST;
729 }
730
731 mxrta->rta_type = RTA_METRICS;
732 mxrta->rta_len = RTA_LENGTH(0);
733
734 while (argc > 0) {
735 if (strcmp(*argv, "src") == 0) {
736 inet_prefix addr;
737 NEXT_ARG();
738 get_addr(&addr, *argv, req.r.rtm_family);
739 if (req.r.rtm_family == AF_UNSPEC)
740 req.r.rtm_family = addr.family;
741 addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
742 } else if (strcmp(*argv, "via") == 0) {
743 inet_prefix addr;
744 gw_ok = 1;
745 NEXT_ARG();
746 get_addr(&addr, *argv, req.r.rtm_family);
747 if (req.r.rtm_family == AF_UNSPEC)
748 req.r.rtm_family = addr.family;
749 addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen);
750 } else if (strcmp(*argv, "from") == 0) {
751 inet_prefix addr;
752 NEXT_ARG();
753 get_prefix(&addr, *argv, req.r.rtm_family);
754 if (req.r.rtm_family == AF_UNSPEC)
755 req.r.rtm_family = addr.family;
756 if (addr.bytelen)
757 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
758 req.r.rtm_src_len = addr.bitlen;
759 } else if (strcmp(*argv, "tos") == 0 ||
760 matches(*argv, "dsfield") == 0) {
761 __u32 tos;
762 NEXT_ARG();
763 if (rtnl_dsfield_a2n(&tos, *argv))
764 invarg("\"tos\" value is invalid\n", *argv);
765 req.r.rtm_tos = tos;
766 } else if (matches(*argv, "metric") == 0 ||
767 matches(*argv, "priority") == 0 ||
768 matches(*argv, "preference") == 0) {
769 __u32 metric;
770 NEXT_ARG();
771 if (get_u32(&metric, *argv, 0))
772 invarg("\"metric\" value is invalid\n", *argv);
773 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
774 } else if (strcmp(*argv, "scope") == 0) {
f332d169 775 __u32 scope = 0;
aba5acdf
SH		 776 NEXT_ARG();
777 if (rtnl_rtscope_a2n(&scope, *argv))
778 invarg("invalid \"scope\" value\n", *argv);
779 req.r.rtm_scope = scope;
780 scope_ok = 1;
781 } else if (strcmp(*argv, "mtu") == 0) {
782 unsigned mtu;
783 NEXT_ARG();
784 if (strcmp(*argv, "lock") == 0) {
785 mxlock |= (1<<RTAX_MTU);
786 NEXT_ARG();
787 }
788 if (get_unsigned(&mtu, *argv, 0))
789 invarg("\"mtu\" value is invalid\n", *argv);
790 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
71e58151
GBY		 791 } else if (strcmp(*argv, "hoplimit") == 0) {
792 unsigned hoplimit;
793 NEXT_ARG();
794 if (strcmp(*argv, "lock") == 0) {
795 mxlock |= (1<<RTAX_HOPLIMIT);
796 NEXT_ARG();
797 }
798 if (get_unsigned(&hoplimit, *argv, 0))
799 invarg("\"hoplimit\" value is invalid\n", *argv);
800 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
aba5acdf
SH		 801 } else if (strcmp(*argv, "advmss") == 0) {
802 unsigned mss;
803 NEXT_ARG();
804 if (strcmp(*argv, "lock") == 0) {
805 mxlock |= (1<<RTAX_ADVMSS);
806 NEXT_ARG();
807 }
808 if (get_unsigned(&mss, *argv, 0))
809 invarg("\"mss\" value is invalid\n", *argv);
810 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
aba5acdf
SH		 811 } else if (matches(*argv, "reordering") == 0) {
812 unsigned reord;
813 NEXT_ARG();
814 if (strcmp(*argv, "lock") == 0) {
815 mxlock |= (1<<RTAX_REORDERING);
816 NEXT_ARG();
817 }
818 if (get_unsigned(&reord, *argv, 0))
819 invarg("\"reordering\" value is invalid\n", *argv);
820 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
aba5acdf
SH		 821 } else if (strcmp(*argv, "rtt") == 0) {
822 unsigned rtt;
823 NEXT_ARG();
824 if (strcmp(*argv, "lock") == 0) {
825 mxlock |= (1<<RTAX_RTT);
826 NEXT_ARG();
827 }
81d03dc3 828 if (get_time_rtt(&rtt, *argv, &raw))
aba5acdf 829 invarg("\"rtt\" value is invalid\n", *argv);
54e0b2e7
RJ		 830 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
831 (raw) ? rtt : rtt * 8);
832 } else if (strcmp(*argv, "rto_min") == 0) {
833 unsigned rto_min;
834 NEXT_ARG();
835 mxlock |= (1<<RTAX_RTO_MIN);
81d03dc3 836 if (get_time_rtt(&rto_min, *argv, &raw))
54e0b2e7
RJ		 837 invarg("\"rto_min\" value is invalid\n",
838 *argv);
839 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
840 rto_min);
aba5acdf
SH		 841 } else if (matches(*argv, "window") == 0) {
842 unsigned win;
843 NEXT_ARG();
844 if (strcmp(*argv, "lock") == 0) {
845 mxlock |= (1<<RTAX_WINDOW);
846 NEXT_ARG();
847 }
848 if (get_unsigned(&win, *argv, 0))
849 invarg("\"window\" value is invalid\n", *argv);
850 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
851 } else if (matches(*argv, "cwnd") == 0) {
852 unsigned win;
853 NEXT_ARG();
854 if (strcmp(*argv, "lock") == 0) {
855 mxlock |= (1<<RTAX_CWND);
856 NEXT_ARG();
857 }
858 if (get_unsigned(&win, *argv, 0))
859 invarg("\"cwnd\" value is invalid\n", *argv);
860 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
a1f1143e
VW		 861 } else if (matches(*argv, "initcwnd") == 0) {
862 unsigned win;
863 NEXT_ARG();
864 if (strcmp(*argv, "lock") == 0) {
865 mxlock |= (1<<RTAX_INITCWND);
866 NEXT_ARG();
867 }
868 if (get_unsigned(&win, *argv, 0))
869 invarg("\"initcwnd\" value is invalid\n", *argv);
870 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITCWND, win);
f5fd8003 871 } else if (matches(*argv, "initrwnd") == 0) {
872 unsigned win;
873 NEXT_ARG();
874 if (strcmp(*argv, "lock") == 0) {
875 mxlock |= (1<<RTAX_INITRWND);
876 NEXT_ARG();
877 }
878 if (get_unsigned(&win, *argv, 0))
879 invarg("\"initrwnd\" value is invalid\n", *argv);
880 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITRWND, win);
aba5acdf
SH		 881 } else if (matches(*argv, "rttvar") == 0) {
882 unsigned win;
883 NEXT_ARG();
884 if (strcmp(*argv, "lock") == 0) {
885 mxlock |= (1<<RTAX_RTTVAR);
886 NEXT_ARG();
887 }
81d03dc3 888 if (get_time_rtt(&win, *argv, &raw))
aba5acdf 889 invarg("\"rttvar\" value is invalid\n", *argv);
54e0b2e7
RJ		 890 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
891 (raw) ? win : win * 4);
aba5acdf
SH		 892 } else if (matches(*argv, "ssthresh") == 0) {
893 unsigned win;
894 NEXT_ARG();
895 if (strcmp(*argv, "lock") == 0) {
896 mxlock |= (1<<RTAX_SSTHRESH);
897 NEXT_ARG();
898 }
899 if (get_unsigned(&win, *argv, 0))
900 invarg("\"ssthresh\" value is invalid\n", *argv);
901 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
902 } else if (matches(*argv, "realms") == 0) {
903 __u32 realm;
904 NEXT_ARG();
905 if (get_rt_realms(&realm, *argv))
906 invarg("\"realm\" value is invalid\n", *argv);
907 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
908 } else if (strcmp(*argv, "onlink") == 0) {
909 req.r.rtm_flags |= RTNH_F_ONLINK;
aba5acdf
SH		 910 } else if (strcmp(*argv, "nexthop") == 0) {
911 nhs_ok = 1;
912 break;
913 } else if (matches(*argv, "protocol") == 0) {
f332d169 914 __u32 prot;
aba5acdf
SH		 915 NEXT_ARG();
916 if (rtnl_rtprot_a2n(&prot, *argv))
917 invarg("\"protocol\" value is invalid\n", *argv);
918 req.r.rtm_protocol = prot;
aba5acdf 919 } else if (matches(*argv, "table") == 0) {
f332d169 920 __u32 tid;
aba5acdf
SH		 921 NEXT_ARG();
922 if (rtnl_rttable_a2n(&tid, *argv))
923 invarg("\"table\" value is invalid\n", *argv);
34e95647
PM		 924 if (tid < 256)
925 req.r.rtm_table = tid;
926 else {
927 req.r.rtm_table = RT_TABLE_UNSPEC;
928 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
929 }
aba5acdf
SH		 930 table_ok = 1;
931 } else if (strcmp(*argv, "dev") == 0 ||
932 strcmp(*argv, "oif") == 0) {
933 NEXT_ARG();
934 d = *argv;
935 } else {
936 int type;
937 inet_prefix dst;
938
939 if (strcmp(*argv, "to") == 0) {
940 NEXT_ARG();
941 }
942 if ((**argv < '0' || **argv > '9') &&
943 rtnl_rtntype_a2n(&type, *argv) == 0) {
944 NEXT_ARG();
945 req.r.rtm_type = type;
aba5acdf
SH		 946 }
947
948 if (matches(*argv, "help") == 0)
949 usage();
950 if (dst_ok)
951 duparg2("to", *argv);
952 get_prefix(&dst, *argv, req.r.rtm_family);
953 if (req.r.rtm_family == AF_UNSPEC)
954 req.r.rtm_family = dst.family;
955 req.r.rtm_dst_len = dst.bitlen;
956 dst_ok = 1;
957 if (dst.bytelen)
958 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
959 }
960 argc--; argv++;
961 }
962
aba5acdf
SH		 963 if (d || nhs_ok) {
964 int idx;
965
966 ll_init_map(&rth);
967
968 if (d) {
969 if ((idx = ll_name_to_index(d)) == 0) {
970 fprintf(stderr, "Cannot find device \"%s\"\n", d);
971 return -1;
972 }
973 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
974 }
975 }
976
977 if (mxrta->rta_len > RTA_LENGTH(0)) {
978 if (mxlock)
979 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
980 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
981 }
982
983 if (nhs_ok)
984 parse_nexthops(&req.n, &req.r, argc, argv);
985
986 if (!table_ok) {
987 if (req.r.rtm_type == RTN_LOCAL ||
988 req.r.rtm_type == RTN_BROADCAST ||
989 req.r.rtm_type == RTN_NAT ||
990 req.r.rtm_type == RTN_ANYCAST)
991 req.r.rtm_table = RT_TABLE_LOCAL;
992 }
993 if (!scope_ok) {
994 if (req.r.rtm_type == RTN_LOCAL ||
995 req.r.rtm_type == RTN_NAT)
996 req.r.rtm_scope = RT_SCOPE_HOST;
997 else if (req.r.rtm_type == RTN_BROADCAST ||
998 req.r.rtm_type == RTN_MULTICAST ||
999 req.r.rtm_type == RTN_ANYCAST)
1000 req.r.rtm_scope = RT_SCOPE_LINK;
1001 else if (req.r.rtm_type == RTN_UNICAST ||
1002 req.r.rtm_type == RTN_UNSPEC) {
1003 if (cmd == RTM_DELROUTE)
1004 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1005 else if (!gw_ok && !nhs_ok)
1006 req.r.rtm_scope = RT_SCOPE_LINK;
1007 }
1008 }
1009
1010 if (req.r.rtm_family == AF_UNSPEC)
1011 req.r.rtm_family = AF_INET;
1012
cd70f3f5 1013 if (rtnl_talk(&rth, &req.n, 0, 0, NULL) < 0)
aba5acdf
SH		 1014 exit(2);
1015
1016 return 0;
1017}
1018
1019static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
1020{
1021 struct {
1022 struct nlmsghdr nlh;
1023 struct rtmsg rtm;
1024 } req;
1025 struct sockaddr_nl nladdr;
1026
1027 memset(&nladdr, 0, sizeof(nladdr));
1028 memset(&req, 0, sizeof(req));
1029 nladdr.nl_family = AF_NETLINK;
1030
1031 req.nlh.nlmsg_len = sizeof(req);
1032 req.nlh.nlmsg_type = RTM_GETROUTE;
1033 req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST;
1034 req.nlh.nlmsg_pid = 0;
1035 req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
1036 req.rtm.rtm_family = family;
1037 req.rtm.rtm_flags |= RTM_F_CLONED;
1038
1039 return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
1040}
1041
1042static int iproute_flush_cache(void)
1043{
1044#define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1045
1046 int len;
1047 int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY);
1048 char *buffer = "-1";
1049
1050 if (flush_fd < 0) {
1051 fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH);
1052 return -1;
1053 }
1054
1055 len = strlen (buffer);
ae665a52 1056
aba5acdf
SH		 1057 if ((write (flush_fd, (void *)buffer, len)) < len) {
1058 fprintf (stderr, "Cannot flush routing cache\n");
25352af7 1059 close(flush_fd);
aba5acdf
SH		 1060 return -1;
1061 }
1062 close(flush_fd);
1063 return 0;
1064}
1065
f4ff11e3
DS		 1066int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
1067{
1068 int ret;
1069 int len = n->nlmsg_len;
1070 struct rtmsg *r = NLMSG_DATA(n);
1071 struct rtattr *tb[RTA_MAX+1];
1072 int host_len = -1;
1073
1074 if (isatty(STDOUT_FILENO)) {
1075 fprintf(stderr, "Not sending binary stream to stdout\n");
1076 return -1;
1077 }
1078
1079 host_len = calc_host_len(r);
1080 len -= NLMSG_LENGTH(sizeof(*r));
1081 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1082
1083 if (!filter_nlmsg(n, tb, host_len))
1084 return 0;
1085
1086 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1087 if ((ret > 0) && (ret != n->nlmsg_len)) {
1088 fprintf(stderr, "Short write while saving nlmsg\n");
1089 ret = -EIO;
1090 }
1091
1092 return ret == n->nlmsg_len ? 0 : ret;
1093}
aba5acdf 1094
f4ff11e3 1095static int iproute_list_flush_or_save(int argc, char **argv, int action)
aba5acdf
SH		 1096{
1097 int do_ipv6 = preferred_family;
aba5acdf
SH		 1098 char *id = NULL;
1099 char *od = NULL;
b0373bfb 1100 unsigned int mark = 0;
f4ff11e3
DS		 1101 rtnl_filter_t filter_fn;
1102
1103 if (action == IPROUTE_SAVE)
1104 filter_fn = save_route;
1105 else
1106 filter_fn = print_route;
aba5acdf
SH		 1107
1108 iproute_reset_filter();
1109 filter.tb = RT_TABLE_MAIN;
1110
f4ff11e3 1111 if ((action == IPROUTE_FLUSH) && argc <= 0) {
aba5acdf
SH		 1112 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1113 return -1;
1114 }
1115
1116 while (argc > 0) {
1117 if (matches(*argv, "table") == 0) {
f332d169 1118 __u32 tid;
aba5acdf
SH		 1119 NEXT_ARG();
1120 if (rtnl_rttable_a2n(&tid, *argv)) {
1121 if (strcmp(*argv, "all") == 0) {
bd4bcdad 1122 filter.tb = 0;
aba5acdf 1123 } else if (strcmp(*argv, "cache") == 0) {
bd4bcdad 1124 filter.cloned = 1;
aba5acdf
SH		 1125 } else if (strcmp(*argv, "help") == 0) {
1126 usage();
1127 } else {
1128 invarg("table id value is invalid\n", *argv);
1129 }
bd4bcdad
PM		 1130 } else
1131 filter.tb = tid;
aba5acdf
SH		 1132 } else if (matches(*argv, "cached") == 0 ||
1133 matches(*argv, "cloned") == 0) {
bd4bcdad 1134 filter.cloned = 1;
aba5acdf
SH		 1135 } else if (strcmp(*argv, "tos") == 0 ||
1136 matches(*argv, "dsfield") == 0) {
1137 __u32 tos;
1138 NEXT_ARG();
1139 if (rtnl_dsfield_a2n(&tos, *argv))
1140 invarg("TOS value is invalid\n", *argv);
1141 filter.tos = tos;
1142 filter.tosmask = -1;
1143 } else if (matches(*argv, "protocol") == 0) {
f332d169 1144 __u32 prot = 0;
aba5acdf
SH		 1145 NEXT_ARG();
1146 filter.protocolmask = -1;
1147 if (rtnl_rtprot_a2n(&prot, *argv)) {
1148 if (strcmp(*argv, "all") != 0)
1149 invarg("invalid \"protocol\"\n", *argv);
1150 prot = 0;
1151 filter.protocolmask = 0;
1152 }
1153 filter.protocol = prot;
1154 } else if (matches(*argv, "scope") == 0) {
f332d169 1155 __u32 scope = 0;
aba5acdf
SH		 1156 NEXT_ARG();
1157 filter.scopemask = -1;
1158 if (rtnl_rtscope_a2n(&scope, *argv)) {
1159 if (strcmp(*argv, "all") != 0)
1160 invarg("invalid \"scope\"\n", *argv);
1161 scope = RT_SCOPE_NOWHERE;
1162 filter.scopemask = 0;
1163 }
1164 filter.scope = scope;
1165 } else if (matches(*argv, "type") == 0) {
1166 int type;
1167 NEXT_ARG();
1168 filter.typemask = -1;
1169 if (rtnl_rtntype_a2n(&type, *argv))
1170 invarg("node type value is invalid\n", *argv);
1171 filter.type = type;
1172 } else if (strcmp(*argv, "dev") == 0 ||
1173 strcmp(*argv, "oif") == 0) {
1174 NEXT_ARG();
1175 od = *argv;
1176 } else if (strcmp(*argv, "iif") == 0) {
1177 NEXT_ARG();
1178 id = *argv;
b0373bfb
ED		 1179 } else if (strcmp(*argv, "mark") == 0) {
1180 NEXT_ARG();
1181 get_unsigned(&mark, *argv, 0);
1182 filter.markmask = -1;
aba5acdf
SH		 1183 } else if (strcmp(*argv, "via") == 0) {
1184 NEXT_ARG();
1185 get_prefix(&filter.rvia, *argv, do_ipv6);
1186 } else if (strcmp(*argv, "src") == 0) {
1187 NEXT_ARG();
1188 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1189 } else if (matches(*argv, "realms") == 0) {
1190 __u32 realm;
1191 NEXT_ARG();
1192 if (get_rt_realms(&realm, *argv))
1193 invarg("invalid realms\n", *argv);
1194 filter.realm = realm;
1195 filter.realmmask = ~0U;
1196 if ((filter.realm&0xFFFF) == 0 &&
1197 (*argv)[strlen(*argv) - 1] == '/')
1198 filter.realmmask &= ~0xFFFF;
1199 if ((filter.realm&0xFFFF0000U) == 0 &&
1200 (strchr(*argv, '/') == NULL ||
1201 (*argv)[0] == '/'))
1202 filter.realmmask &= ~0xFFFF0000U;
1203 } else if (matches(*argv, "from") == 0) {
1204 NEXT_ARG();
1205 if (matches(*argv, "root") == 0) {
1206 NEXT_ARG();
1207 get_prefix(&filter.rsrc, *argv, do_ipv6);
1208 } else if (matches(*argv, "match") == 0) {
1209 NEXT_ARG();
1210 get_prefix(&filter.msrc, *argv, do_ipv6);
1211 } else {
1212 if (matches(*argv, "exact") == 0) {
1213 NEXT_ARG();
1214 }
1215 get_prefix(&filter.msrc, *argv, do_ipv6);
1216 filter.rsrc = filter.msrc;
1217 }
1218 } else {
1219 if (matches(*argv, "to") == 0) {
1220 NEXT_ARG();
1221 }
1222 if (matches(*argv, "root") == 0) {
1223 NEXT_ARG();
1224 get_prefix(&filter.rdst, *argv, do_ipv6);
1225 } else if (matches(*argv, "match") == 0) {
1226 NEXT_ARG();
1227 get_prefix(&filter.mdst, *argv, do_ipv6);
1228 } else {
1229 if (matches(*argv, "exact") == 0) {
1230 NEXT_ARG();
1231 }
1232 get_prefix(&filter.mdst, *argv, do_ipv6);
1233 filter.rdst = filter.mdst;
1234 }
1235 }
1236 argc--; argv++;
1237 }
1238
1239 if (do_ipv6 == AF_UNSPEC && filter.tb)
1240 do_ipv6 = AF_INET;
1241
aba5acdf
SH		 1242 ll_init_map(&rth);
1243
1244 if (id || od) {
1245 int idx;
1246
1247 if (id) {
1248 if ((idx = ll_name_to_index(id)) == 0) {
1249 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1250 return -1;
1251 }
1252 filter.iif = idx;
1253 filter.iifmask = -1;
1254 }
1255 if (od) {
1256 if ((idx = ll_name_to_index(od)) == 0) {
1257 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1258 return -1;
1259 }
1260 filter.oif = idx;
1261 filter.oifmask = -1;
1262 }
1263 }
b0373bfb 1264 filter.mark = mark;
aba5acdf 1265
f4ff11e3 1266 if (action == IPROUTE_FLUSH) {
aba5acdf
SH		 1267 int round = 0;
1268 char flushb[4096-512];
33551240 1269 time_t start = time(0);
aba5acdf 1270
bd4bcdad 1271 if (filter.cloned) {
aba5acdf
SH		 1272 if (do_ipv6 != AF_INET6) {
1273 iproute_flush_cache();
1274 if (show_stats)
1275 printf("*** IPv4 routing cache is flushed.\n");
1276 }
1277 if (do_ipv6 == AF_INET)
1278 return 0;
1279 }
1280
1281 filter.flushb = flushb;
1282 filter.flushp = 0;
1283 filter.flushe = sizeof(flushb);
aba5acdf
SH		 1284
1285 for (;;) {
1286 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1287 perror("Cannot send dump request");
1288 exit(1);
1289 }
1290 filter.flushed = 0;
cd70f3f5 1291 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
aba5acdf
SH		 1292 fprintf(stderr, "Flush terminated\n");
1293 exit(1);
1294 }
1295 if (filter.flushed == 0) {
f0b34d2d
AH		 1296 if (show_stats) {
1297 if (round == 0 && (!filter.cloned || do_ipv6 == AF_INET6))
1298 printf("Nothing to flush.\n");
1299 else
1300 printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":"");
1301 }
aba5acdf
SH		 1302 fflush(stdout);
1303 return 0;
1304 }
1305 round++;
1306 if (flush_update() < 0)
1307 exit(1);
33551240
SH		 1308
1309 if (time(0) - start > 30) {
1310 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1311 time(0) - start, filter.flushed);
1312 exit(1);
1313 }
1314
aba5acdf
SH		 1315 if (show_stats) {
1316 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1317 fflush(stdout);
1318 }
1319 }
1320 }
1321
bd4bcdad 1322 if (!filter.cloned) {
aba5acdf
SH		 1323 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1324 perror("Cannot send dump request");
1325 exit(1);
1326 }
1327 } else {
1328 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1329 perror("Cannot send dump request");
1330 exit(1);
1331 }
1332 }
1333
cd70f3f5 1334 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
aba5acdf
SH		 1335 fprintf(stderr, "Dump terminated\n");
1336 exit(1);
1337 }
1338
1339 exit(0);
1340}
1341
1342
1343int iproute_get(int argc, char **argv)
1344{
aba5acdf
SH		 1345 struct {
1346 struct nlmsghdr n;
1347 struct rtmsg r;
1348 char buf[1024];
1349 } req;
1350 char *idev = NULL;
1351 char *odev = NULL;
1352 int connected = 0;
1353 int from_ok = 0;
b0373bfb 1354 unsigned int mark = 0;
aba5acdf
SH		 1355
1356 memset(&req, 0, sizeof(req));
1357
1358 iproute_reset_filter();
c73f3e02 1359 filter.cloned = 2;
aba5acdf
SH		 1360
1361 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
1362 req.n.nlmsg_flags = NLM_F_REQUEST;
1363 req.n.nlmsg_type = RTM_GETROUTE;
1364 req.r.rtm_family = preferred_family;
1365 req.r.rtm_table = 0;
1366 req.r.rtm_protocol = 0;
1367 req.r.rtm_scope = 0;
1368 req.r.rtm_type = 0;
1369 req.r.rtm_src_len = 0;
1370 req.r.rtm_dst_len = 0;
1371 req.r.rtm_tos = 0;
ae665a52 1372
aba5acdf
SH		 1373 while (argc > 0) {
1374 if (strcmp(*argv, "tos") == 0 ||
1375 matches(*argv, "dsfield") == 0) {
1376 __u32 tos;
1377 NEXT_ARG();
1378 if (rtnl_dsfield_a2n(&tos, *argv))
1379 invarg("TOS value is invalid\n", *argv);
1380 req.r.rtm_tos = tos;
1381 } else if (matches(*argv, "from") == 0) {
1382 inet_prefix addr;
1383 NEXT_ARG();
1384 if (matches(*argv, "help") == 0)
1385 usage();
1386 from_ok = 1;
1387 get_prefix(&addr, *argv, req.r.rtm_family);
1388 if (req.r.rtm_family == AF_UNSPEC)
1389 req.r.rtm_family = addr.family;
1390 if (addr.bytelen)
1391 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1392 req.r.rtm_src_len = addr.bitlen;
1393 } else if (matches(*argv, "iif") == 0) {
1394 NEXT_ARG();
1395 idev = *argv;
b0373bfb
ED		 1396 } else if (matches(*argv, "mark") == 0) {
1397 NEXT_ARG();
1398 get_unsigned(&mark, *argv, 0);
aba5acdf
SH		 1399 } else if (matches(*argv, "oif") == 0 ||
1400 strcmp(*argv, "dev") == 0) {
1401 NEXT_ARG();
1402 odev = *argv;
1403 } else if (matches(*argv, "notify") == 0) {
1404 req.r.rtm_flags |= RTM_F_NOTIFY;
1405 } else if (matches(*argv, "connected") == 0) {
1406 connected = 1;
1407 } else {
1408 inet_prefix addr;
1409 if (strcmp(*argv, "to") == 0) {
1410 NEXT_ARG();
1411 }
1412 if (matches(*argv, "help") == 0)
1413 usage();
1414 get_prefix(&addr, *argv, req.r.rtm_family);
1415 if (req.r.rtm_family == AF_UNSPEC)
1416 req.r.rtm_family = addr.family;
1417 if (addr.bytelen)
1418 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1419 req.r.rtm_dst_len = addr.bitlen;
1420 }
1421 argc--; argv++;
1422 }
1423
1424 if (req.r.rtm_dst_len == 0) {
1425 fprintf(stderr, "need at least destination address\n");
1426 exit(1);
1427 }
1428
aba5acdf
SH		 1429 ll_init_map(&rth);
1430
1431 if (idev || odev) {
1432 int idx;
1433
1434 if (idev) {
1435 if ((idx = ll_name_to_index(idev)) == 0) {
1436 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1437 return -1;
1438 }
1439 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1440 }
1441 if (odev) {
1442 if ((idx = ll_name_to_index(odev)) == 0) {
1443 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1444 return -1;
1445 }
1446 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1447 }
1448 }
b0373bfb
ED		 1449 if (mark)
1450 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
aba5acdf
SH		 1451
1452 if (req.r.rtm_family == AF_UNSPEC)
1453 req.r.rtm_family = AF_INET;
1454
cd70f3f5 1455 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n) < 0)
aba5acdf
SH		 1456 exit(2);
1457
1458 if (connected && !from_ok) {
1459 struct rtmsg *r = NLMSG_DATA(&req.n);
1460 int len = req.n.nlmsg_len;
1461 struct rtattr * tb[RTA_MAX+1];
1462
1463 if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1464 fprintf(stderr, "An error :-)\n");
1465 exit(1);
1466 }
1467
1468 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1469 fprintf(stderr, "Not a route?\n");
1470 return -1;
1471 }
1472 len -= NLMSG_LENGTH(sizeof(*r));
1473 if (len < 0) {
1474 fprintf(stderr, "Wrong len %d\n", len);
1475 return -1;
1476 }
1477
aba5acdf
SH		 1478 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1479
1480 if (tb[RTA_PREFSRC]) {
1481 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1482 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1483 } else if (!tb[RTA_SRC]) {
1484 fprintf(stderr, "Failed to connect the route\n");
1485 return -1;
1486 }
1487 if (!odev && tb[RTA_OIF])
1488 tb[RTA_OIF]->rta_type = 0;
1489 if (tb[RTA_GATEWAY])
1490 tb[RTA_GATEWAY]->rta_type = 0;
1491 if (!idev && tb[RTA_IIF])
1492 tb[RTA_IIF]->rta_type = 0;
1493 req.n.nlmsg_flags = NLM_F_REQUEST;
1494 req.n.nlmsg_type = RTM_GETROUTE;
1495
cd70f3f5 1496 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n) < 0)
aba5acdf
SH		 1497 exit(2);
1498 }
1499
1500 if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1501 fprintf(stderr, "An error :-)\n");
1502 exit(1);
1503 }
1504
1505 exit(0);
1506}
1507
f4ff11e3
DS		 1508int restore_handler(const struct sockaddr_nl *nl, struct nlmsghdr *n, void *arg)
1509{
1510 int ret;
1511
1512 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
1513
1514 ll_init_map(&rth);
1515
cd70f3f5 1516 ret = rtnl_talk(&rth, n, 0, 0, n);
f4ff11e3
DS		 1517 if ((ret < 0) && (errno == EEXIST))
1518 ret = 0;
1519
1520 return ret;
1521}
1522
1523int iproute_restore(void)
1524{
1525 exit(rtnl_from_file(stdin, &restore_handler, NULL));
1526}
1527
aba5acdf
SH		 1528void iproute_reset_filter()
1529{
1530 memset(&filter, 0, sizeof(filter));
1531 filter.mdst.bitlen = -1;
1532 filter.msrc.bitlen = -1;
1533}
1534
1535int do_iproute(int argc, char **argv)
1536{
1537 if (argc < 1)
f4ff11e3 1538 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
ae665a52 1539
aba5acdf
SH		 1540 if (matches(*argv, "add") == 0)
1541 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1542 argc-1, argv+1);
1543 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1544 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1545 argc-1, argv+1);
1546 if (matches(*argv, "replace") == 0)
1547 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1548 argc-1, argv+1);
1549 if (matches(*argv, "prepend") == 0)
1550 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1551 argc-1, argv+1);
1552 if (matches(*argv, "append") == 0)
1553 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
1554 argc-1, argv+1);
1555 if (matches(*argv, "test") == 0)
1556 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
1557 argc-1, argv+1);
1558 if (matches(*argv, "delete") == 0)
1559 return iproute_modify(RTM_DELROUTE, 0,
1560 argc-1, argv+1);
1561 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
1562 || matches(*argv, "lst") == 0)
f4ff11e3 1563 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
aba5acdf
SH		 1564 if (matches(*argv, "get") == 0)
1565 return iproute_get(argc-1, argv+1);
1566 if (matches(*argv, "flush") == 0)
f4ff11e3
DS		 1567 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
1568 if (matches(*argv, "save") == 0)
1569 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
1570 if (matches(*argv, "restore") == 0)
1571 return iproute_restore();
aba5acdf
SH		 1572 if (matches(*argv, "help") == 0)
1573 usage();
1574 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
1575 exit(-1);
1576}
1577
Upstream mirror of iproute2