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(Logical change 1.3)
[mirror_iproute2.git] / ip / iproute.c
1 /*
2 * iproute.c "ip route".
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 *
12 * Changes:
13 *
14 * Rani Assaf <rani@magic.metawire.com> 980929: resolve addresses
15 * Kunihiro Ishiguro <kunihiro@zebra.org> 001102: rtnh_ifindex was not initialized
16 */
17
18 #include <stdio.h>
19 #include <stdlib.h>
20 #include <unistd.h>
21 #include <syslog.h>
22 #include <fcntl.h>
23 #include <string.h>
24 #include <sys/time.h>
25 #include <sys/socket.h>
26 #include <netinet/in.h>
27 #include <netinet/ip.h>
28 #include <arpa/inet.h>
29 #include <linux/in_route.h>
30
31 #include "rt_names.h"
32 #include "utils.h"
33 #include "ip_common.h"
34
35 #ifndef RTAX_RTTVAR
36 #define RTAX_RTTVAR RTAX_HOPS
37 #endif
38
39
40 static void usage(void) __attribute__((noreturn));
41
42 static void usage(void)
43 {
44 fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n");
45 fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n");
46 fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n");
47 fprintf(stderr, " ip route { add | del | change | append | replace | monitor } ROUTE\n");
48 fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n");
49 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n");
50 fprintf(stderr, " [ type TYPE ] [ scope SCOPE ]\n");
51 fprintf(stderr, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n");
52 fprintf(stderr, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n");
53 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n");
54 fprintf(stderr, " [ scope SCOPE ] [ metric METRIC ]\n");
55 fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n");
56 fprintf(stderr, "NH := [ via ADDRESS ] [ dev STRING ] [ weight NUMBER ] NHFLAGS\n");
57 fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ]\n");
58 fprintf(stderr, " [ rtt NUMBER ] [ rttvar NUMBER ]\n");
59 fprintf(stderr, " [ window NUMBER] [ cwnd NUMBER ] [ ssthresh REALM ]\n");
60 fprintf(stderr, " [ realms REALM ]\n");
61 fprintf(stderr, "TYPE := [ unicast | local | broadcast | multicast | throw |\n");
62 fprintf(stderr, " unreachable | prohibit | blackhole | nat ]\n");
63 fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
64 fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n");
65 fprintf(stderr, "FLAGS := [ equalize ]\n");
66 fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n");
67 fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n");
68 exit(-1);
69 }
70
71
72 static struct
73 {
74 int tb;
75 int flushed;
76 char *flushb;
77 int flushp;
78 int flushe;
79 struct rtnl_handle *rth;
80 int protocol, protocolmask;
81 int scope, scopemask;
82 int type, typemask;
83 int tos, tosmask;
84 int iif, iifmask;
85 int oif, oifmask;
86 int realm, realmmask;
87 inet_prefix rprefsrc;
88 inet_prefix rvia;
89 inet_prefix rdst;
90 inet_prefix mdst;
91 inet_prefix rsrc;
92 inet_prefix msrc;
93 } filter;
94
95 static int flush_update(void)
96 {
97 if (rtnl_send(filter.rth, filter.flushb, filter.flushp) < 0) {
98 perror("Failed to send flush request\n");
99 return -1;
100 }
101 filter.flushp = 0;
102 return 0;
103 }
104
105 int print_route(struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
106 {
107 FILE *fp = (FILE*)arg;
108 struct rtmsg *r = NLMSG_DATA(n);
109 int len = n->nlmsg_len;
110 struct rtattr * tb[RTA_MAX+1];
111 char abuf[256];
112 inet_prefix dst;
113 inet_prefix src;
114 inet_prefix prefsrc;
115 inet_prefix via;
116 int host_len = -1;
117 SPRINT_BUF(b1);
118
119
120 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
121 fprintf(stderr, "Not a route: %08x %08x %08x\n",
122 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
123 return 0;
124 }
125 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
126 return 0;
127 len -= NLMSG_LENGTH(sizeof(*r));
128 if (len < 0) {
129 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
130 return -1;
131 }
132
133 if (r->rtm_family == AF_INET6)
134 host_len = 128;
135 else if (r->rtm_family == AF_INET)
136 host_len = 32;
137 else if (r->rtm_family == AF_DECnet)
138 host_len = 16;
139 else if (r->rtm_family == AF_IPX)
140 host_len = 80;
141
142 if (r->rtm_family == AF_INET6) {
143 if (filter.tb) {
144 if (filter.tb < 0) {
145 if (!(r->rtm_flags&RTM_F_CLONED))
146 return 0;
147 } else {
148 if (r->rtm_flags&RTM_F_CLONED)
149 return 0;
150 if (filter.tb == RT_TABLE_LOCAL) {
151 if (r->rtm_type != RTN_LOCAL)
152 return 0;
153 } else if (filter.tb == RT_TABLE_MAIN) {
154 if (r->rtm_type == RTN_LOCAL)
155 return 0;
156 } else {
157 return 0;
158 }
159 }
160 }
161 } else {
162 if (filter.tb > 0 && filter.tb != r->rtm_table)
163 return 0;
164 }
165 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
166 return 0;
167 if ((filter.scope^r->rtm_scope)&filter.scopemask)
168 return 0;
169 if ((filter.type^r->rtm_type)&filter.typemask)
170 return 0;
171 if ((filter.tos^r->rtm_tos)&filter.tosmask)
172 return 0;
173 if (filter.rdst.family &&
174 (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len))
175 return 0;
176 if (filter.mdst.family &&
177 (r->rtm_family != filter.mdst.family ||
178 (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len)))
179 return 0;
180 if (filter.rsrc.family &&
181 (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len))
182 return 0;
183 if (filter.msrc.family &&
184 (r->rtm_family != filter.msrc.family ||
185 (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len)))
186 return 0;
187 if (filter.rvia.family && r->rtm_family != filter.rvia.family)
188 return 0;
189 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
190 return 0;
191
192
193 memset(tb, 0, sizeof(tb));
194 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
195
196 memset(&dst, 0, sizeof(dst));
197 dst.family = r->rtm_family;
198 if (tb[RTA_DST])
199 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
200 if (filter.rsrc.family || filter.msrc.family) {
201 memset(&src, 0, sizeof(src));
202 src.family = r->rtm_family;
203 if (tb[RTA_SRC])
204 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
205 }
206 if (filter.rvia.bitlen>0) {
207 memset(&via, 0, sizeof(via));
208 via.family = r->rtm_family;
209 if (tb[RTA_GATEWAY])
210 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len);
211 }
212 if (filter.rprefsrc.bitlen>0) {
213 memset(&prefsrc, 0, sizeof(prefsrc));
214 prefsrc.family = r->rtm_family;
215 if (tb[RTA_PREFSRC])
216 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len);
217 }
218
219 if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
220 return 0;
221 if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
222 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
223 return 0;
224
225 if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
226 return 0;
227 if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
228 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
229 return 0;
230
231 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
232 return 0;
233 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
234 return 0;
235 if (filter.realmmask) {
236 __u32 realms = 0;
237 if (tb[RTA_FLOW])
238 realms = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
239 if ((realms^filter.realm)&filter.realmmask)
240 return 0;
241 }
242 if (filter.iifmask) {
243 int iif = 0;
244 if (tb[RTA_IIF])
245 iif = *(int*)RTA_DATA(tb[RTA_IIF]);
246 if ((iif^filter.iif)&filter.iifmask)
247 return 0;
248 }
249 if (filter.oifmask) {
250 int oif = 0;
251 if (tb[RTA_OIF])
252 oif = *(int*)RTA_DATA(tb[RTA_OIF]);
253 if ((oif^filter.oif)&filter.oifmask)
254 return 0;
255 }
256 if (filter.flushb &&
257 r->rtm_family == AF_INET6 &&
258 r->rtm_dst_len == 0 &&
259 r->rtm_type == RTN_UNREACHABLE &&
260 tb[RTA_PRIORITY] &&
261 *(int*)RTA_DATA(tb[RTA_PRIORITY]) == -1)
262 return 0;
263
264 if (filter.flushb) {
265 struct nlmsghdr *fn;
266 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
267 if (flush_update())
268 return -1;
269 }
270 fn = (struct nlmsghdr*)(filter.flushb + NLMSG_ALIGN(filter.flushp));
271 memcpy(fn, n, n->nlmsg_len);
272 fn->nlmsg_type = RTM_DELROUTE;
273 fn->nlmsg_flags = NLM_F_REQUEST;
274 fn->nlmsg_seq = ++filter.rth->seq;
275 filter.flushp = (((char*)fn) + n->nlmsg_len) - filter.flushb;
276 filter.flushed++;
277 if (show_stats < 2)
278 return 0;
279 }
280
281 if (n->nlmsg_type == RTM_DELROUTE)
282 fprintf(fp, "Deleted ");
283 if (r->rtm_type != RTN_UNICAST && !filter.type)
284 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
285
286 if (tb[RTA_DST]) {
287 if (r->rtm_dst_len != host_len) {
288 fprintf(fp, "%s/%u ", rt_addr_n2a(r->rtm_family,
289 RTA_PAYLOAD(tb[RTA_DST]),
290 RTA_DATA(tb[RTA_DST]),
291 abuf, sizeof(abuf)),
292 r->rtm_dst_len
293 );
294 } else {
295 fprintf(fp, "%s ", format_host(r->rtm_family,
296 RTA_PAYLOAD(tb[RTA_DST]),
297 RTA_DATA(tb[RTA_DST]),
298 abuf, sizeof(abuf))
299 );
300 }
301 } else if (r->rtm_dst_len) {
302 fprintf(fp, "0/%d ", r->rtm_dst_len);
303 } else {
304 fprintf(fp, "default ");
305 }
306 if (tb[RTA_SRC]) {
307 if (r->rtm_src_len != host_len) {
308 fprintf(fp, "from %s/%u ", rt_addr_n2a(r->rtm_family,
309 RTA_PAYLOAD(tb[RTA_SRC]),
310 RTA_DATA(tb[RTA_SRC]),
311 abuf, sizeof(abuf)),
312 r->rtm_src_len
313 );
314 } else {
315 fprintf(fp, "from %s ", format_host(r->rtm_family,
316 RTA_PAYLOAD(tb[RTA_SRC]),
317 RTA_DATA(tb[RTA_SRC]),
318 abuf, sizeof(abuf))
319 );
320 }
321 } else if (r->rtm_src_len) {
322 fprintf(fp, "from 0/%u ", r->rtm_src_len);
323 }
324 if (r->rtm_tos && filter.tosmask != -1) {
325 SPRINT_BUF(b1);
326 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
327 }
328 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
329 fprintf(fp, "via %s ",
330 format_host(r->rtm_family,
331 RTA_PAYLOAD(tb[RTA_GATEWAY]),
332 RTA_DATA(tb[RTA_GATEWAY]),
333 abuf, sizeof(abuf)));
334 }
335 if (tb[RTA_OIF] && filter.oifmask != -1)
336 fprintf(fp, "dev %s ", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_OIF])));
337
338 if (!(r->rtm_flags&RTM_F_CLONED)) {
339 if (r->rtm_table != RT_TABLE_MAIN && !filter.tb)
340 fprintf(fp, " table %s ", rtnl_rttable_n2a(r->rtm_table, b1, sizeof(b1)));
341 if (r->rtm_protocol != RTPROT_BOOT && filter.protocolmask != -1)
342 fprintf(fp, " proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1)));
343 if (r->rtm_scope != RT_SCOPE_UNIVERSE && filter.scopemask != -1)
344 fprintf(fp, " scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1)));
345 }
346 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
347 /* Do not use format_host(). It is our local addr
348 and symbolic name will not be useful.
349 */
350 fprintf(fp, " src %s ",
351 rt_addr_n2a(r->rtm_family,
352 RTA_PAYLOAD(tb[RTA_PREFSRC]),
353 RTA_DATA(tb[RTA_PREFSRC]),
354 abuf, sizeof(abuf)));
355 }
356 if (tb[RTA_PRIORITY])
357 fprintf(fp, " metric %d ", *(__u32*)RTA_DATA(tb[RTA_PRIORITY]));
358 if (r->rtm_flags & RTNH_F_DEAD)
359 fprintf(fp, "dead ");
360 if (r->rtm_flags & RTNH_F_ONLINK)
361 fprintf(fp, "onlink ");
362 if (r->rtm_flags & RTNH_F_PERVASIVE)
363 fprintf(fp, "pervasive ");
364 if (r->rtm_flags & RTM_F_EQUALIZE)
365 fprintf(fp, "equalize ");
366 if (r->rtm_flags & RTM_F_NOTIFY)
367 fprintf(fp, "notify ");
368
369 if (tb[RTA_FLOW] && filter.realmmask != ~0U) {
370 __u32 to = *(__u32*)RTA_DATA(tb[RTA_FLOW]);
371 __u32 from = to>>16;
372 to &= 0xFFFF;
373 fprintf(fp, "realm%s ", from ? "s" : "");
374 if (from) {
375 fprintf(fp, "%s/",
376 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
377 }
378 fprintf(fp, "%s ",
379 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
380 }
381 if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) {
382 __u32 flags = r->rtm_flags&~0xFFFF;
383 int first = 1;
384
385 fprintf(fp, "%s cache ", _SL_);
386
387 #define PRTFL(fl,flname) if (flags&RTCF_##fl) { \
388 flags &= ~RTCF_##fl; \
389 fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
390 first = 0; }
391 PRTFL(LOCAL, "local");
392 PRTFL(REJECT, "reject");
393 PRTFL(MULTICAST, "mc");
394 PRTFL(BROADCAST, "brd");
395 PRTFL(DNAT, "dst-nat");
396 PRTFL(SNAT, "src-nat");
397 PRTFL(MASQ, "masq");
398 PRTFL(DIRECTDST, "dst-direct");
399 PRTFL(DIRECTSRC, "src-direct");
400 PRTFL(REDIRECTED, "redirected");
401 PRTFL(DOREDIRECT, "redirect");
402 PRTFL(FAST, "fastroute");
403 PRTFL(NOTIFY, "notify");
404 PRTFL(TPROXY, "proxy");
405 #ifdef RTCF_EQUALIZE
406 PRTFL(EQUALIZE, "equalize");
407 #endif
408 if (flags)
409 fprintf(fp, "%s%x> ", first ? "<" : "", flags);
410 if (tb[RTA_CACHEINFO]) {
411 struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]);
412 static int hz;
413 if (!hz)
414 hz = get_hz();
415 if (ci->rta_expires != 0)
416 fprintf(fp, " expires %dsec", ci->rta_expires/hz);
417 if (ci->rta_error != 0)
418 fprintf(fp, " error %d", ci->rta_error);
419 if (show_stats) {
420 if (ci->rta_clntref)
421 fprintf(fp, " users %d", ci->rta_clntref);
422 if (ci->rta_used != 0)
423 fprintf(fp, " used %d", ci->rta_used);
424 if (ci->rta_lastuse != 0)
425 fprintf(fp, " age %dsec", ci->rta_lastuse/hz);
426 }
427 #ifdef RTNETLINK_HAVE_PEERINFO
428 if (ci->rta_id)
429 fprintf(fp, " ipid 0x%04x", ci->rta_id);
430 if (ci->rta_ts || ci->rta_tsage)
431 fprintf(fp, " ts 0x%x tsage %dsec", ci->rta_ts, ci->rta_tsage);
432 #endif
433 }
434 } else if (r->rtm_family == AF_INET6) {
435 struct rta_cacheinfo *ci = NULL;
436 if (tb[RTA_CACHEINFO])
437 ci = RTA_DATA(tb[RTA_CACHEINFO]);
438 if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
439 static int hz;
440 if (!hz)
441 hz = get_hz();
442 if (r->rtm_flags & RTM_F_CLONED)
443 fprintf(fp, "%s cache ", _SL_);
444 if (ci->rta_expires)
445 fprintf(fp, " expires %dsec", ci->rta_expires/hz);
446 if (ci->rta_error != 0)
447 fprintf(fp, " error %d", ci->rta_error);
448 if (show_stats) {
449 if (ci->rta_clntref)
450 fprintf(fp, " users %d", ci->rta_clntref);
451 if (ci->rta_used != 0)
452 fprintf(fp, " used %d", ci->rta_used);
453 if (ci->rta_lastuse != 0)
454 fprintf(fp, " age %dsec", ci->rta_lastuse/hz);
455 }
456 } else if (ci) {
457 if (ci->rta_error != 0)
458 fprintf(fp, " error %d", ci->rta_error);
459 }
460 }
461 if (tb[RTA_METRICS]) {
462 int i;
463 unsigned mxlock = 0;
464 struct rtattr *mxrta[RTAX_MAX+1];
465
466 memset(mxrta, 0, sizeof(mxrta));
467
468 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]),
469 RTA_PAYLOAD(tb[RTA_METRICS]));
470 if (mxrta[RTAX_LOCK])
471 mxlock = *(unsigned*)RTA_DATA(mxrta[RTAX_LOCK]);
472
473 for (i=2; i<=RTAX_MAX; i++) {
474 static char *mx_names[] =
475 {
476 "mtu",
477 "window",
478 "rtt",
479 "rttvar",
480 "ssthresh",
481 "cwnd",
482 "advmss",
483 "reordering",
484 };
485 static int hz;
486 if (mxrta[i] == NULL)
487 continue;
488 if (!hz)
489 hz = get_hz();
490 if (i-2 < sizeof(mx_names)/sizeof(char*))
491 fprintf(fp, " %s", mx_names[i-2]);
492 else
493 fprintf(fp, " metric%d", i);
494 if (mxlock & (1<<i))
495 fprintf(fp, " lock");
496
497 if (i != RTAX_RTT && i != RTAX_RTTVAR)
498 fprintf(fp, " %u", *(unsigned*)RTA_DATA(mxrta[i]));
499 else {
500 unsigned val = *(unsigned*)RTA_DATA(mxrta[i]);
501
502 val *= 1000;
503 if (i == RTAX_RTT)
504 val /= 8;
505 else
506 val /= 4;
507 if (val >= hz)
508 fprintf(fp, " %ums", val/hz);
509 else
510 fprintf(fp, " %.2fms", (float)val/hz);
511 }
512 }
513 }
514 if (tb[RTA_IIF] && filter.iifmask != -1) {
515 fprintf(fp, " iif %s", ll_index_to_name(*(int*)RTA_DATA(tb[RTA_IIF])));
516 }
517 if (tb[RTA_MULTIPATH]) {
518 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
519 int first = 0;
520
521 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
522
523 for (;;) {
524 if (len < sizeof(*nh))
525 break;
526 if (nh->rtnh_len > len)
527 break;
528 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
529 if (first)
530 fprintf(fp, " Oifs:");
531 else
532 fprintf(fp, " ");
533 } else
534 fprintf(fp, "%s\tnexthop", _SL_);
535 if (nh->rtnh_len > sizeof(*nh)) {
536 memset(tb, 0, sizeof(tb));
537 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh));
538 if (tb[RTA_GATEWAY]) {
539 fprintf(fp, " via %s ",
540 format_host(r->rtm_family,
541 RTA_PAYLOAD(tb[RTA_GATEWAY]),
542 RTA_DATA(tb[RTA_GATEWAY]),
543 abuf, sizeof(abuf)));
544 }
545 }
546 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
547 fprintf(fp, " %s", ll_index_to_name(nh->rtnh_ifindex));
548 if (nh->rtnh_hops != 1)
549 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
550 } else {
551 fprintf(fp, " dev %s", ll_index_to_name(nh->rtnh_ifindex));
552 fprintf(fp, " weight %d", nh->rtnh_hops+1);
553 }
554 if (nh->rtnh_flags & RTNH_F_DEAD)
555 fprintf(fp, " dead");
556 if (nh->rtnh_flags & RTNH_F_ONLINK)
557 fprintf(fp, " onlink");
558 if (nh->rtnh_flags & RTNH_F_PERVASIVE)
559 fprintf(fp, " pervasive");
560 len -= NLMSG_ALIGN(nh->rtnh_len);
561 nh = RTNH_NEXT(nh);
562 }
563 }
564 fprintf(fp, "\n");
565 fflush(fp);
566 return 0;
567 }
568
569
570 int parse_one_nh(struct rtattr *rta, struct rtnexthop *rtnh, int *argcp, char ***argvp)
571 {
572 int argc = *argcp;
573 char **argv = *argvp;
574
575 while (++argv, --argc > 0) {
576 if (strcmp(*argv, "via") == 0) {
577 NEXT_ARG();
578 rta_addattr32(rta, 4096, RTA_GATEWAY, get_addr32(*argv));
579 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
580 } else if (strcmp(*argv, "dev") == 0) {
581 NEXT_ARG();
582 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
583 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
584 exit(1);
585 }
586 } else if (strcmp(*argv, "weight") == 0) {
587 unsigned w;
588 NEXT_ARG();
589 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
590 invarg("\"weight\" is invalid\n", *argv);
591 rtnh->rtnh_hops = w - 1;
592 } else if (strcmp(*argv, "onlink") == 0) {
593 rtnh->rtnh_flags |= RTNH_F_ONLINK;
594 } else
595 break;
596 }
597 *argcp = argc;
598 *argvp = argv;
599 return 0;
600 }
601
602 int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r, int argc, char **argv)
603 {
604 char buf[1024];
605 struct rtattr *rta = (void*)buf;
606 struct rtnexthop *rtnh;
607
608 rta->rta_type = RTA_MULTIPATH;
609 rta->rta_len = RTA_LENGTH(0);
610 rtnh = RTA_DATA(rta);
611
612 while (argc > 0) {
613 if (strcmp(*argv, "nexthop") != 0) {
614 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
615 exit(-1);
616 }
617 if (argc <= 1) {
618 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
619 exit(-1);
620 }
621 memset(rtnh, 0, sizeof(*rtnh));
622 rtnh->rtnh_len = sizeof(*rtnh);
623 rta->rta_len += rtnh->rtnh_len;
624 parse_one_nh(rta, rtnh, &argc, &argv);
625 rtnh = RTNH_NEXT(rtnh);
626 }
627
628 if (rta->rta_len > RTA_LENGTH(0))
629 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
630 return 0;
631 }
632
633
634 int iproute_modify(int cmd, unsigned flags, int argc, char **argv)
635 {
636 struct rtnl_handle rth;
637 struct {
638 struct nlmsghdr n;
639 struct rtmsg r;
640 char buf[1024];
641 } req;
642 char mxbuf[256];
643 struct rtattr * mxrta = (void*)mxbuf;
644 unsigned mxlock = 0;
645 char *d = NULL;
646 int gw_ok = 0;
647 int dst_ok = 0;
648 int nhs_ok = 0;
649 int scope_ok = 0;
650 int table_ok = 0;
651 int proto_ok = 0;
652 int type_ok = 0;
653
654 memset(&req, 0, sizeof(req));
655
656 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
657 req.n.nlmsg_flags = NLM_F_REQUEST|flags;
658 req.n.nlmsg_type = cmd;
659 req.r.rtm_family = preferred_family;
660 req.r.rtm_table = RT_TABLE_MAIN;
661 req.r.rtm_scope = RT_SCOPE_NOWHERE;
662
663 if (cmd != RTM_DELROUTE) {
664 req.r.rtm_protocol = RTPROT_BOOT;
665 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
666 req.r.rtm_type = RTN_UNICAST;
667 }
668
669 mxrta->rta_type = RTA_METRICS;
670 mxrta->rta_len = RTA_LENGTH(0);
671
672 while (argc > 0) {
673 if (strcmp(*argv, "src") == 0) {
674 inet_prefix addr;
675 NEXT_ARG();
676 get_addr(&addr, *argv, req.r.rtm_family);
677 if (req.r.rtm_family == AF_UNSPEC)
678 req.r.rtm_family = addr.family;
679 addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
680 } else if (strcmp(*argv, "via") == 0) {
681 inet_prefix addr;
682 gw_ok = 1;
683 NEXT_ARG();
684 get_addr(&addr, *argv, req.r.rtm_family);
685 if (req.r.rtm_family == AF_UNSPEC)
686 req.r.rtm_family = addr.family;
687 addattr_l(&req.n, sizeof(req), RTA_GATEWAY, &addr.data, addr.bytelen);
688 } else if (strcmp(*argv, "from") == 0) {
689 inet_prefix addr;
690 NEXT_ARG();
691 get_prefix(&addr, *argv, req.r.rtm_family);
692 if (req.r.rtm_family == AF_UNSPEC)
693 req.r.rtm_family = addr.family;
694 if (addr.bytelen)
695 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
696 req.r.rtm_src_len = addr.bitlen;
697 } else if (strcmp(*argv, "tos") == 0 ||
698 matches(*argv, "dsfield") == 0) {
699 __u32 tos;
700 NEXT_ARG();
701 if (rtnl_dsfield_a2n(&tos, *argv))
702 invarg("\"tos\" value is invalid\n", *argv);
703 req.r.rtm_tos = tos;
704 } else if (matches(*argv, "metric") == 0 ||
705 matches(*argv, "priority") == 0 ||
706 matches(*argv, "preference") == 0) {
707 __u32 metric;
708 NEXT_ARG();
709 if (get_u32(&metric, *argv, 0))
710 invarg("\"metric\" value is invalid\n", *argv);
711 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
712 } else if (strcmp(*argv, "scope") == 0) {
713 int scope = 0;
714 NEXT_ARG();
715 if (rtnl_rtscope_a2n(&scope, *argv))
716 invarg("invalid \"scope\" value\n", *argv);
717 req.r.rtm_scope = scope;
718 scope_ok = 1;
719 } else if (strcmp(*argv, "mtu") == 0) {
720 unsigned mtu;
721 NEXT_ARG();
722 if (strcmp(*argv, "lock") == 0) {
723 mxlock |= (1<<RTAX_MTU);
724 NEXT_ARG();
725 }
726 if (get_unsigned(&mtu, *argv, 0))
727 invarg("\"mtu\" value is invalid\n", *argv);
728 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
729 #ifdef RTAX_ADVMSS
730 } else if (strcmp(*argv, "advmss") == 0) {
731 unsigned mss;
732 NEXT_ARG();
733 if (strcmp(*argv, "lock") == 0) {
734 mxlock |= (1<<RTAX_ADVMSS);
735 NEXT_ARG();
736 }
737 if (get_unsigned(&mss, *argv, 0))
738 invarg("\"mss\" value is invalid\n", *argv);
739 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
740 #endif
741 #ifdef RTAX_REORDERING
742 } else if (matches(*argv, "reordering") == 0) {
743 unsigned reord;
744 NEXT_ARG();
745 if (strcmp(*argv, "lock") == 0) {
746 mxlock |= (1<<RTAX_REORDERING);
747 NEXT_ARG();
748 }
749 if (get_unsigned(&reord, *argv, 0))
750 invarg("\"reordering\" value is invalid\n", *argv);
751 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
752 #endif
753 } else if (strcmp(*argv, "rtt") == 0) {
754 unsigned rtt;
755 NEXT_ARG();
756 if (strcmp(*argv, "lock") == 0) {
757 mxlock |= (1<<RTAX_RTT);
758 NEXT_ARG();
759 }
760 if (get_unsigned(&rtt, *argv, 0))
761 invarg("\"rtt\" value is invalid\n", *argv);
762 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT, rtt);
763 } else if (matches(*argv, "window") == 0) {
764 unsigned win;
765 NEXT_ARG();
766 if (strcmp(*argv, "lock") == 0) {
767 mxlock |= (1<<RTAX_WINDOW);
768 NEXT_ARG();
769 }
770 if (get_unsigned(&win, *argv, 0))
771 invarg("\"window\" value is invalid\n", *argv);
772 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
773 } else if (matches(*argv, "cwnd") == 0) {
774 unsigned win;
775 NEXT_ARG();
776 if (strcmp(*argv, "lock") == 0) {
777 mxlock |= (1<<RTAX_CWND);
778 NEXT_ARG();
779 }
780 if (get_unsigned(&win, *argv, 0))
781 invarg("\"cwnd\" value is invalid\n", *argv);
782 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
783 } else if (matches(*argv, "rttvar") == 0) {
784 unsigned win;
785 NEXT_ARG();
786 if (strcmp(*argv, "lock") == 0) {
787 mxlock |= (1<<RTAX_RTTVAR);
788 NEXT_ARG();
789 }
790 if (get_unsigned(&win, *argv, 0))
791 invarg("\"rttvar\" value is invalid\n", *argv);
792 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR, win);
793 } else if (matches(*argv, "ssthresh") == 0) {
794 unsigned win;
795 NEXT_ARG();
796 if (strcmp(*argv, "lock") == 0) {
797 mxlock |= (1<<RTAX_SSTHRESH);
798 NEXT_ARG();
799 }
800 if (get_unsigned(&win, *argv, 0))
801 invarg("\"ssthresh\" value is invalid\n", *argv);
802 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
803 } else if (matches(*argv, "realms") == 0) {
804 __u32 realm;
805 NEXT_ARG();
806 if (get_rt_realms(&realm, *argv))
807 invarg("\"realm\" value is invalid\n", *argv);
808 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
809 } else if (strcmp(*argv, "onlink") == 0) {
810 req.r.rtm_flags |= RTNH_F_ONLINK;
811 } else if (matches(*argv, "equalize") == 0 ||
812 strcmp(*argv, "eql") == 0) {
813 req.r.rtm_flags |= RTM_F_EQUALIZE;
814 } else if (strcmp(*argv, "nexthop") == 0) {
815 nhs_ok = 1;
816 break;
817 } else if (matches(*argv, "protocol") == 0) {
818 int prot;
819 NEXT_ARG();
820 if (rtnl_rtprot_a2n(&prot, *argv))
821 invarg("\"protocol\" value is invalid\n", *argv);
822 req.r.rtm_protocol = prot;
823 proto_ok =1;
824 } else if (matches(*argv, "table") == 0) {
825 int tid;
826 NEXT_ARG();
827 if (rtnl_rttable_a2n(&tid, *argv))
828 invarg("\"table\" value is invalid\n", *argv);
829 req.r.rtm_table = tid;
830 table_ok = 1;
831 } else if (strcmp(*argv, "dev") == 0 ||
832 strcmp(*argv, "oif") == 0) {
833 NEXT_ARG();
834 d = *argv;
835 } else {
836 int type;
837 inet_prefix dst;
838
839 if (strcmp(*argv, "to") == 0) {
840 NEXT_ARG();
841 }
842 if ((**argv < '0' || **argv > '9') &&
843 rtnl_rtntype_a2n(&type, *argv) == 0) {
844 NEXT_ARG();
845 req.r.rtm_type = type;
846 type_ok = 1;
847 }
848
849 if (matches(*argv, "help") == 0)
850 usage();
851 if (dst_ok)
852 duparg2("to", *argv);
853 get_prefix(&dst, *argv, req.r.rtm_family);
854 if (req.r.rtm_family == AF_UNSPEC)
855 req.r.rtm_family = dst.family;
856 req.r.rtm_dst_len = dst.bitlen;
857 dst_ok = 1;
858 if (dst.bytelen)
859 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
860 }
861 argc--; argv++;
862 }
863
864 if (rtnl_open(&rth, 0) < 0)
865 exit(1);
866
867 if (d || nhs_ok) {
868 int idx;
869
870 ll_init_map(&rth);
871
872 if (d) {
873 if ((idx = ll_name_to_index(d)) == 0) {
874 fprintf(stderr, "Cannot find device \"%s\"\n", d);
875 return -1;
876 }
877 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
878 }
879 }
880
881 if (mxrta->rta_len > RTA_LENGTH(0)) {
882 if (mxlock)
883 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
884 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
885 }
886
887 if (nhs_ok)
888 parse_nexthops(&req.n, &req.r, argc, argv);
889
890 if (!table_ok) {
891 if (req.r.rtm_type == RTN_LOCAL ||
892 req.r.rtm_type == RTN_BROADCAST ||
893 req.r.rtm_type == RTN_NAT ||
894 req.r.rtm_type == RTN_ANYCAST)
895 req.r.rtm_table = RT_TABLE_LOCAL;
896 }
897 if (!scope_ok) {
898 if (req.r.rtm_type == RTN_LOCAL ||
899 req.r.rtm_type == RTN_NAT)
900 req.r.rtm_scope = RT_SCOPE_HOST;
901 else if (req.r.rtm_type == RTN_BROADCAST ||
902 req.r.rtm_type == RTN_MULTICAST ||
903 req.r.rtm_type == RTN_ANYCAST)
904 req.r.rtm_scope = RT_SCOPE_LINK;
905 else if (req.r.rtm_type == RTN_UNICAST ||
906 req.r.rtm_type == RTN_UNSPEC) {
907 if (cmd == RTM_DELROUTE)
908 req.r.rtm_scope = RT_SCOPE_NOWHERE;
909 else if (!gw_ok && !nhs_ok)
910 req.r.rtm_scope = RT_SCOPE_LINK;
911 }
912 }
913
914 if (req.r.rtm_family == AF_UNSPEC)
915 req.r.rtm_family = AF_INET;
916
917 if (rtnl_talk(&rth, &req.n, 0, 0, NULL, NULL, NULL) < 0)
918 exit(2);
919
920 return 0;
921 }
922
923 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
924 {
925 struct {
926 struct nlmsghdr nlh;
927 struct rtmsg rtm;
928 } req;
929 struct sockaddr_nl nladdr;
930
931 memset(&nladdr, 0, sizeof(nladdr));
932 memset(&req, 0, sizeof(req));
933 nladdr.nl_family = AF_NETLINK;
934
935 req.nlh.nlmsg_len = sizeof(req);
936 req.nlh.nlmsg_type = RTM_GETROUTE;
937 req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_REQUEST;
938 req.nlh.nlmsg_pid = 0;
939 req.nlh.nlmsg_seq = rth->dump = ++rth->seq;
940 req.rtm.rtm_family = family;
941 req.rtm.rtm_flags |= RTM_F_CLONED;
942
943 return sendto(rth->fd, (void*)&req, sizeof(req), 0, (struct sockaddr*)&nladdr, sizeof(nladdr));
944 }
945
946 static int iproute_flush_cache(void)
947 {
948 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
949
950 int len;
951 int flush_fd = open (ROUTE_FLUSH_PATH, O_WRONLY);
952 char *buffer = "-1";
953
954 if (flush_fd < 0) {
955 fprintf (stderr, "Cannot open \"%s\"\n", ROUTE_FLUSH_PATH);
956 return -1;
957 }
958
959 len = strlen (buffer);
960
961 if ((write (flush_fd, (void *)buffer, len)) < len) {
962 fprintf (stderr, "Cannot flush routing cache\n");
963 return -1;
964 }
965 close(flush_fd);
966 return 0;
967 }
968
969
970 static int iproute_list_or_flush(int argc, char **argv, int flush)
971 {
972 int do_ipv6 = preferred_family;
973 struct rtnl_handle rth;
974 char *id = NULL;
975 char *od = NULL;
976
977 iproute_reset_filter();
978 filter.tb = RT_TABLE_MAIN;
979
980 if (flush && argc <= 0) {
981 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
982 return -1;
983 }
984
985 while (argc > 0) {
986 if (matches(*argv, "table") == 0) {
987 int tid;
988 NEXT_ARG();
989 if (rtnl_rttable_a2n(&tid, *argv)) {
990 if (strcmp(*argv, "all") == 0) {
991 tid = 0;
992 } else if (strcmp(*argv, "cache") == 0) {
993 tid = -1;
994 } else if (strcmp(*argv, "help") == 0) {
995 usage();
996 } else {
997 invarg("table id value is invalid\n", *argv);
998 }
999 }
1000 filter.tb = tid;
1001 } else if (matches(*argv, "cached") == 0 ||
1002 matches(*argv, "cloned") == 0) {
1003 filter.tb = -1;
1004 } else if (strcmp(*argv, "tos") == 0 ||
1005 matches(*argv, "dsfield") == 0) {
1006 __u32 tos;
1007 NEXT_ARG();
1008 if (rtnl_dsfield_a2n(&tos, *argv))
1009 invarg("TOS value is invalid\n", *argv);
1010 filter.tos = tos;
1011 filter.tosmask = -1;
1012 } else if (matches(*argv, "protocol") == 0) {
1013 int prot = 0;
1014 NEXT_ARG();
1015 filter.protocolmask = -1;
1016 if (rtnl_rtprot_a2n(&prot, *argv)) {
1017 if (strcmp(*argv, "all") != 0)
1018 invarg("invalid \"protocol\"\n", *argv);
1019 prot = 0;
1020 filter.protocolmask = 0;
1021 }
1022 filter.protocol = prot;
1023 } else if (matches(*argv, "scope") == 0) {
1024 int scope = 0;
1025 NEXT_ARG();
1026 filter.scopemask = -1;
1027 if (rtnl_rtscope_a2n(&scope, *argv)) {
1028 if (strcmp(*argv, "all") != 0)
1029 invarg("invalid \"scope\"\n", *argv);
1030 scope = RT_SCOPE_NOWHERE;
1031 filter.scopemask = 0;
1032 }
1033 filter.scope = scope;
1034 } else if (matches(*argv, "type") == 0) {
1035 int type;
1036 NEXT_ARG();
1037 filter.typemask = -1;
1038 if (rtnl_rtntype_a2n(&type, *argv))
1039 invarg("node type value is invalid\n", *argv);
1040 filter.type = type;
1041 } else if (strcmp(*argv, "dev") == 0 ||
1042 strcmp(*argv, "oif") == 0) {
1043 NEXT_ARG();
1044 od = *argv;
1045 } else if (strcmp(*argv, "iif") == 0) {
1046 NEXT_ARG();
1047 id = *argv;
1048 } else if (strcmp(*argv, "via") == 0) {
1049 NEXT_ARG();
1050 get_prefix(&filter.rvia, *argv, do_ipv6);
1051 } else if (strcmp(*argv, "src") == 0) {
1052 NEXT_ARG();
1053 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1054 } else if (matches(*argv, "realms") == 0) {
1055 __u32 realm;
1056 NEXT_ARG();
1057 if (get_rt_realms(&realm, *argv))
1058 invarg("invalid realms\n", *argv);
1059 filter.realm = realm;
1060 filter.realmmask = ~0U;
1061 if ((filter.realm&0xFFFF) == 0 &&
1062 (*argv)[strlen(*argv) - 1] == '/')
1063 filter.realmmask &= ~0xFFFF;
1064 if ((filter.realm&0xFFFF0000U) == 0 &&
1065 (strchr(*argv, '/') == NULL ||
1066 (*argv)[0] == '/'))
1067 filter.realmmask &= ~0xFFFF0000U;
1068 } else if (matches(*argv, "from") == 0) {
1069 NEXT_ARG();
1070 if (matches(*argv, "root") == 0) {
1071 NEXT_ARG();
1072 get_prefix(&filter.rsrc, *argv, do_ipv6);
1073 } else if (matches(*argv, "match") == 0) {
1074 NEXT_ARG();
1075 get_prefix(&filter.msrc, *argv, do_ipv6);
1076 } else {
1077 if (matches(*argv, "exact") == 0) {
1078 NEXT_ARG();
1079 }
1080 get_prefix(&filter.msrc, *argv, do_ipv6);
1081 filter.rsrc = filter.msrc;
1082 }
1083 } else {
1084 if (matches(*argv, "to") == 0) {
1085 NEXT_ARG();
1086 }
1087 if (matches(*argv, "root") == 0) {
1088 NEXT_ARG();
1089 get_prefix(&filter.rdst, *argv, do_ipv6);
1090 } else if (matches(*argv, "match") == 0) {
1091 NEXT_ARG();
1092 get_prefix(&filter.mdst, *argv, do_ipv6);
1093 } else {
1094 if (matches(*argv, "exact") == 0) {
1095 NEXT_ARG();
1096 }
1097 get_prefix(&filter.mdst, *argv, do_ipv6);
1098 filter.rdst = filter.mdst;
1099 }
1100 }
1101 argc--; argv++;
1102 }
1103
1104 if (do_ipv6 == AF_UNSPEC && filter.tb)
1105 do_ipv6 = AF_INET;
1106
1107 if (rtnl_open(&rth, 0) < 0)
1108 exit(1);
1109
1110 ll_init_map(&rth);
1111
1112 if (id || od) {
1113 int idx;
1114
1115 if (id) {
1116 if ((idx = ll_name_to_index(id)) == 0) {
1117 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1118 return -1;
1119 }
1120 filter.iif = idx;
1121 filter.iifmask = -1;
1122 }
1123 if (od) {
1124 if ((idx = ll_name_to_index(od)) == 0) {
1125 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1126 return -1;
1127 }
1128 filter.oif = idx;
1129 filter.oifmask = -1;
1130 }
1131 }
1132
1133 if (flush) {
1134 int round = 0;
1135 char flushb[4096-512];
1136
1137 if (filter.tb == -1) {
1138 if (do_ipv6 != AF_INET6) {
1139 iproute_flush_cache();
1140 if (show_stats)
1141 printf("*** IPv4 routing cache is flushed.\n");
1142 }
1143 if (do_ipv6 == AF_INET)
1144 return 0;
1145 }
1146
1147 filter.flushb = flushb;
1148 filter.flushp = 0;
1149 filter.flushe = sizeof(flushb);
1150 filter.rth = &rth;
1151
1152 for (;;) {
1153 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1154 perror("Cannot send dump request");
1155 exit(1);
1156 }
1157 filter.flushed = 0;
1158 if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
1159 fprintf(stderr, "Flush terminated\n");
1160 exit(1);
1161 }
1162 if (filter.flushed == 0) {
1163 if (round == 0) {
1164 if (filter.tb != -1 || do_ipv6 == AF_INET6)
1165 fprintf(stderr, "Nothing to flush.\n");
1166 } else if (show_stats)
1167 printf("*** Flush is complete after %d round%s ***\n", round, round>1?"s":"");
1168 fflush(stdout);
1169 return 0;
1170 }
1171 round++;
1172 if (flush_update() < 0)
1173 exit(1);
1174 if (show_stats) {
1175 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1176 fflush(stdout);
1177 }
1178 }
1179 }
1180
1181 if (filter.tb != -1) {
1182 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1183 perror("Cannot send dump request");
1184 exit(1);
1185 }
1186 } else {
1187 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1188 perror("Cannot send dump request");
1189 exit(1);
1190 }
1191 }
1192
1193 if (rtnl_dump_filter(&rth, print_route, stdout, NULL, NULL) < 0) {
1194 fprintf(stderr, "Dump terminated\n");
1195 exit(1);
1196 }
1197
1198 exit(0);
1199 }
1200
1201
1202 int iproute_get(int argc, char **argv)
1203 {
1204 struct rtnl_handle rth;
1205 struct {
1206 struct nlmsghdr n;
1207 struct rtmsg r;
1208 char buf[1024];
1209 } req;
1210 char *idev = NULL;
1211 char *odev = NULL;
1212 int connected = 0;
1213 int from_ok = 0;
1214
1215 memset(&req, 0, sizeof(req));
1216
1217 iproute_reset_filter();
1218
1219 req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
1220 req.n.nlmsg_flags = NLM_F_REQUEST;
1221 req.n.nlmsg_type = RTM_GETROUTE;
1222 req.r.rtm_family = preferred_family;
1223 req.r.rtm_table = 0;
1224 req.r.rtm_protocol = 0;
1225 req.r.rtm_scope = 0;
1226 req.r.rtm_type = 0;
1227 req.r.rtm_src_len = 0;
1228 req.r.rtm_dst_len = 0;
1229 req.r.rtm_tos = 0;
1230
1231 while (argc > 0) {
1232 if (strcmp(*argv, "tos") == 0 ||
1233 matches(*argv, "dsfield") == 0) {
1234 __u32 tos;
1235 NEXT_ARG();
1236 if (rtnl_dsfield_a2n(&tos, *argv))
1237 invarg("TOS value is invalid\n", *argv);
1238 req.r.rtm_tos = tos;
1239 } else if (matches(*argv, "from") == 0) {
1240 inet_prefix addr;
1241 NEXT_ARG();
1242 if (matches(*argv, "help") == 0)
1243 usage();
1244 from_ok = 1;
1245 get_prefix(&addr, *argv, req.r.rtm_family);
1246 if (req.r.rtm_family == AF_UNSPEC)
1247 req.r.rtm_family = addr.family;
1248 if (addr.bytelen)
1249 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1250 req.r.rtm_src_len = addr.bitlen;
1251 } else if (matches(*argv, "iif") == 0) {
1252 NEXT_ARG();
1253 idev = *argv;
1254 } else if (matches(*argv, "oif") == 0 ||
1255 strcmp(*argv, "dev") == 0) {
1256 NEXT_ARG();
1257 odev = *argv;
1258 } else if (matches(*argv, "notify") == 0) {
1259 req.r.rtm_flags |= RTM_F_NOTIFY;
1260 } else if (matches(*argv, "connected") == 0) {
1261 connected = 1;
1262 } else {
1263 inet_prefix addr;
1264 if (strcmp(*argv, "to") == 0) {
1265 NEXT_ARG();
1266 }
1267 if (matches(*argv, "help") == 0)
1268 usage();
1269 get_prefix(&addr, *argv, req.r.rtm_family);
1270 if (req.r.rtm_family == AF_UNSPEC)
1271 req.r.rtm_family = addr.family;
1272 if (addr.bytelen)
1273 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1274 req.r.rtm_dst_len = addr.bitlen;
1275 }
1276 argc--; argv++;
1277 }
1278
1279 if (req.r.rtm_dst_len == 0) {
1280 fprintf(stderr, "need at least destination address\n");
1281 exit(1);
1282 }
1283
1284 if (rtnl_open(&rth, 0) < 0)
1285 exit(1);
1286
1287 ll_init_map(&rth);
1288
1289 if (idev || odev) {
1290 int idx;
1291
1292 if (idev) {
1293 if ((idx = ll_name_to_index(idev)) == 0) {
1294 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1295 return -1;
1296 }
1297 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1298 }
1299 if (odev) {
1300 if ((idx = ll_name_to_index(odev)) == 0) {
1301 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1302 return -1;
1303 }
1304 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1305 }
1306 }
1307
1308 if (req.r.rtm_family == AF_UNSPEC)
1309 req.r.rtm_family = AF_INET;
1310
1311 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1312 exit(2);
1313
1314 if (connected && !from_ok) {
1315 struct rtmsg *r = NLMSG_DATA(&req.n);
1316 int len = req.n.nlmsg_len;
1317 struct rtattr * tb[RTA_MAX+1];
1318
1319 if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1320 fprintf(stderr, "An error :-)\n");
1321 exit(1);
1322 }
1323
1324 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1325 fprintf(stderr, "Not a route?\n");
1326 return -1;
1327 }
1328 len -= NLMSG_LENGTH(sizeof(*r));
1329 if (len < 0) {
1330 fprintf(stderr, "Wrong len %d\n", len);
1331 return -1;
1332 }
1333
1334 memset(tb, 0, sizeof(tb));
1335 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1336
1337 if (tb[RTA_PREFSRC]) {
1338 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1339 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1340 } else if (!tb[RTA_SRC]) {
1341 fprintf(stderr, "Failed to connect the route\n");
1342 return -1;
1343 }
1344 if (!odev && tb[RTA_OIF])
1345 tb[RTA_OIF]->rta_type = 0;
1346 if (tb[RTA_GATEWAY])
1347 tb[RTA_GATEWAY]->rta_type = 0;
1348 if (!idev && tb[RTA_IIF])
1349 tb[RTA_IIF]->rta_type = 0;
1350 req.n.nlmsg_flags = NLM_F_REQUEST;
1351 req.n.nlmsg_type = RTM_GETROUTE;
1352
1353 if (rtnl_talk(&rth, &req.n, 0, 0, &req.n, NULL, NULL) < 0)
1354 exit(2);
1355 }
1356
1357 if (print_route(NULL, &req.n, (void*)stdout) < 0) {
1358 fprintf(stderr, "An error :-)\n");
1359 exit(1);
1360 }
1361
1362 exit(0);
1363 }
1364
1365 void iproute_reset_filter()
1366 {
1367 memset(&filter, 0, sizeof(filter));
1368 filter.mdst.bitlen = -1;
1369 filter.msrc.bitlen = -1;
1370 }
1371
1372 int do_iproute(int argc, char **argv)
1373 {
1374 if (argc < 1)
1375 return iproute_list_or_flush(0, NULL, 0);
1376
1377 if (matches(*argv, "add") == 0)
1378 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1379 argc-1, argv+1);
1380 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1381 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1382 argc-1, argv+1);
1383 if (matches(*argv, "replace") == 0)
1384 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1385 argc-1, argv+1);
1386 if (matches(*argv, "prepend") == 0)
1387 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1388 argc-1, argv+1);
1389 if (matches(*argv, "append") == 0)
1390 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
1391 argc-1, argv+1);
1392 if (matches(*argv, "test") == 0)
1393 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
1394 argc-1, argv+1);
1395 if (matches(*argv, "delete") == 0)
1396 return iproute_modify(RTM_DELROUTE, 0,
1397 argc-1, argv+1);
1398 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
1399 || matches(*argv, "lst") == 0)
1400 return iproute_list_or_flush(argc-1, argv+1, 0);
1401 if (matches(*argv, "get") == 0)
1402 return iproute_get(argc-1, argv+1);
1403 if (matches(*argv, "flush") == 0)
1404 return iproute_list_or_flush(argc-1, argv+1, 1);
1405 if (matches(*argv, "help") == 0)
1406 usage();
1407 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
1408 exit(-1);
1409 }
1410
Upstream mirror of iproute2