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