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iproute: Remove useless check for nexthop keyword when setting RTA_OIF
[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
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 #include <linux/icmpv6.h>
27 #include <errno.h>
28
29 #include "rt_names.h"
30 #include "utils.h"
31 #include "ip_common.h"
32 #include "iproute_lwtunnel.h"
33
34 #ifndef RTAX_RTTVAR
35 #define RTAX_RTTVAR RTAX_HOPS
36 #endif
37
38 enum list_action {
39 IPROUTE_LIST,
40 IPROUTE_FLUSH,
41 IPROUTE_SAVE,
42 };
43 static const char *mx_names[RTAX_MAX+1] = {
44 [RTAX_MTU] = "mtu",
45 [RTAX_WINDOW] = "window",
46 [RTAX_RTT] = "rtt",
47 [RTAX_RTTVAR] = "rttvar",
48 [RTAX_SSTHRESH] = "ssthresh",
49 [RTAX_CWND] = "cwnd",
50 [RTAX_ADVMSS] = "advmss",
51 [RTAX_REORDERING] = "reordering",
52 [RTAX_HOPLIMIT] = "hoplimit",
53 [RTAX_INITCWND] = "initcwnd",
54 [RTAX_FEATURES] = "features",
55 [RTAX_RTO_MIN] = "rto_min",
56 [RTAX_INITRWND] = "initrwnd",
57 [RTAX_QUICKACK] = "quickack",
58 [RTAX_CC_ALGO] = "congctl",
59 };
60 static void usage(void) __attribute__((noreturn));
61
62 static void usage(void)
63 {
64 fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n");
65 fprintf(stderr, " ip route save SELECTOR\n");
66 fprintf(stderr, " ip route restore\n");
67 fprintf(stderr, " ip route showdump\n");
68 fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n");
69 fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n");
70 fprintf(stderr, " [ mark NUMBER ] [ vrf NAME ]\n");
71 fprintf(stderr, " [ uid NUMBER ]\n");
72 fprintf(stderr, " ip route { add | del | change | append | replace } ROUTE\n");
73 fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n");
74 fprintf(stderr, " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n");
75 fprintf(stderr, " [ type TYPE ] [ scope SCOPE ]\n");
76 fprintf(stderr, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n");
77 fprintf(stderr, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n");
78 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n");
79 fprintf(stderr, " [ scope SCOPE ] [ metric METRIC ]\n");
80 fprintf(stderr, " [ ttl-propagate { enabled | disabled } ]\n");
81 fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n");
82 fprintf(stderr, "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n");
83 fprintf(stderr, " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n");
84 fprintf(stderr, "FAMILY := [ inet | inet6 | ipx | dnet | mpls | bridge | link ]\n");
85 fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n");
86 fprintf(stderr, " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n");
87 fprintf(stderr, " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n");
88 fprintf(stderr, " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n");
89 fprintf(stderr, " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n");
90 fprintf(stderr, " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n");
91 fprintf(stderr, " [ pref PREF ] [ expires TIME ]\n");
92 fprintf(stderr, "TYPE := { unicast | local | broadcast | multicast | throw |\n");
93 fprintf(stderr, " unreachable | prohibit | blackhole | nat }\n");
94 fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
95 fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n");
96 fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n");
97 fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n");
98 fprintf(stderr, "PREF := [ low | medium | high ]\n");
99 fprintf(stderr, "TIME := NUMBER[s|ms]\n");
100 fprintf(stderr, "BOOL := [1|0]\n");
101 fprintf(stderr, "FEATURES := ecn\n");
102 fprintf(stderr, "ENCAPTYPE := [ mpls | ip | ip6 | seg6 ]\n");
103 fprintf(stderr, "ENCAPHDR := [ MPLSLABEL | SEG6HDR ]\n");
104 fprintf(stderr, "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n");
105 fprintf(stderr, "SEGMODE := [ encap | inline ]\n");
106 exit(-1);
107 }
108
109
110 static struct
111 {
112 unsigned int tb;
113 int cloned;
114 int flushed;
115 char *flushb;
116 int flushp;
117 int flushe;
118 int protocol, protocolmask;
119 int scope, scopemask;
120 __u64 typemask;
121 int tos, tosmask;
122 int iif, iifmask;
123 int oif, oifmask;
124 int mark, markmask;
125 int realm, realmmask;
126 inet_prefix rprefsrc;
127 inet_prefix rvia;
128 inet_prefix rdst;
129 inet_prefix mdst;
130 inet_prefix rsrc;
131 inet_prefix msrc;
132 } filter;
133
134 static int flush_update(void)
135 {
136 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
137 perror("Failed to send flush request");
138 return -1;
139 }
140 filter.flushp = 0;
141 return 0;
142 }
143
144 static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
145 {
146 struct rtmsg *r = NLMSG_DATA(n);
147 inet_prefix dst = { .family = r->rtm_family };
148 inet_prefix src = { .family = r->rtm_family };
149 inet_prefix via = { .family = r->rtm_family };
150 inet_prefix prefsrc = { .family = r->rtm_family };
151 __u32 table;
152 static int ip6_multiple_tables;
153
154 table = rtm_get_table(r, tb);
155
156 if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
157 return 0;
158
159 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
160 ip6_multiple_tables = 1;
161
162 if (filter.cloned == !(r->rtm_flags&RTM_F_CLONED))
163 return 0;
164
165 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
166 if (filter.tb) {
167 if (filter.tb == RT_TABLE_LOCAL) {
168 if (r->rtm_type != RTN_LOCAL)
169 return 0;
170 } else if (filter.tb == RT_TABLE_MAIN) {
171 if (r->rtm_type == RTN_LOCAL)
172 return 0;
173 } else {
174 return 0;
175 }
176 }
177 } else {
178 if (filter.tb > 0 && filter.tb != table)
179 return 0;
180 }
181 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
182 return 0;
183 if ((filter.scope^r->rtm_scope)&filter.scopemask)
184 return 0;
185
186 if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
187 return 0;
188 if ((filter.tos^r->rtm_tos)&filter.tosmask)
189 return 0;
190 if (filter.rdst.family &&
191 (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len))
192 return 0;
193 if (filter.mdst.family &&
194 (r->rtm_family != filter.mdst.family ||
195 (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len)))
196 return 0;
197 if (filter.rsrc.family &&
198 (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len))
199 return 0;
200 if (filter.msrc.family &&
201 (r->rtm_family != filter.msrc.family ||
202 (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len)))
203 return 0;
204 if (filter.rvia.family) {
205 int family = r->rtm_family;
206
207 if (tb[RTA_VIA]) {
208 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
209
210 family = via->rtvia_family;
211 }
212 if (family != filter.rvia.family)
213 return 0;
214 }
215 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
216 return 0;
217
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 if (tb[RTA_SRC])
222 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
223 }
224 if (filter.rvia.bitlen > 0) {
225 if (tb[RTA_GATEWAY])
226 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
227 if (tb[RTA_VIA]) {
228 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
229 struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
230
231 via.family = rtvia->rtvia_family;
232 memcpy(&via.data, rtvia->rtvia_addr, len);
233 }
234 }
235 if (filter.rprefsrc.bitlen > 0) {
236 if (tb[RTA_PREFSRC])
237 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
238 }
239
240 if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
241 return 0;
242 if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
243 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
244 return 0;
245
246 if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
247 return 0;
248 if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
249 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
250 return 0;
251
252 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
253 return 0;
254 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
255 return 0;
256 if (filter.realmmask) {
257 __u32 realms = 0;
258
259 if (tb[RTA_FLOW])
260 realms = rta_getattr_u32(tb[RTA_FLOW]);
261 if ((realms^filter.realm)&filter.realmmask)
262 return 0;
263 }
264 if (filter.iifmask) {
265 int iif = 0;
266
267 if (tb[RTA_IIF])
268 iif = rta_getattr_u32(tb[RTA_IIF]);
269 if ((iif^filter.iif)&filter.iifmask)
270 return 0;
271 }
272 if (filter.oifmask) {
273 int oif = 0;
274
275 if (tb[RTA_OIF])
276 oif = rta_getattr_u32(tb[RTA_OIF]);
277 if ((oif^filter.oif)&filter.oifmask)
278 return 0;
279 }
280 if (filter.markmask) {
281 int mark = 0;
282
283 if (tb[RTA_MARK])
284 mark = rta_getattr_u32(tb[RTA_MARK]);
285 if ((mark ^ filter.mark) & filter.markmask)
286 return 0;
287 }
288 if (filter.flushb &&
289 r->rtm_family == AF_INET6 &&
290 r->rtm_dst_len == 0 &&
291 r->rtm_type == RTN_UNREACHABLE &&
292 tb[RTA_PRIORITY] &&
293 rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
294 return 0;
295
296 return 1;
297 }
298
299 static void print_rtax_features(FILE *fp, unsigned int features)
300 {
301 unsigned int of = features;
302
303 if (features & RTAX_FEATURE_ECN) {
304 fprintf(fp, "ecn ");
305 features &= ~RTAX_FEATURE_ECN;
306 }
307
308 if (features)
309 fprintf(fp, "0x%x ", of);
310 }
311
312 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
313 {
314 FILE *fp = (FILE *)arg;
315 struct rtmsg *r = NLMSG_DATA(n);
316 int len = n->nlmsg_len;
317 struct rtattr *tb[RTA_MAX+1];
318 int host_len, family;
319 __u32 table;
320
321 SPRINT_BUF(b1);
322 static int hz;
323
324 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
325 fprintf(stderr, "Not a route: %08x %08x %08x\n",
326 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
327 return -1;
328 }
329 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
330 return 0;
331 len -= NLMSG_LENGTH(sizeof(*r));
332 if (len < 0) {
333 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
334 return -1;
335 }
336
337 host_len = af_bit_len(r->rtm_family);
338
339 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
340 table = rtm_get_table(r, tb);
341
342 if (!filter_nlmsg(n, tb, host_len))
343 return 0;
344
345 if (filter.flushb) {
346 struct nlmsghdr *fn;
347
348 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
349 if (flush_update())
350 return -1;
351 }
352 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
353 memcpy(fn, n, n->nlmsg_len);
354 fn->nlmsg_type = RTM_DELROUTE;
355 fn->nlmsg_flags = NLM_F_REQUEST;
356 fn->nlmsg_seq = ++rth.seq;
357 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
358 filter.flushed++;
359 if (show_stats < 2)
360 return 0;
361 }
362
363 if (n->nlmsg_type == RTM_DELROUTE)
364 fprintf(fp, "Deleted ");
365 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
366 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
367 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
368
369 if (tb[RTA_DST]) {
370 family = get_real_family(r->rtm_type, r->rtm_family);
371 if (r->rtm_dst_len != host_len) {
372 fprintf(fp, "%s/%u ",
373 rt_addr_n2a_rta(family, tb[RTA_DST]),
374 r->rtm_dst_len);
375 } else {
376 fprintf(fp, "%s ",
377 format_host_rta(family, tb[RTA_DST]));
378 }
379 } else if (r->rtm_dst_len) {
380 fprintf(fp, "0/%d ", r->rtm_dst_len);
381 } else {
382 fprintf(fp, "default ");
383 }
384 if (tb[RTA_SRC]) {
385 family = get_real_family(r->rtm_type, r->rtm_family);
386 if (r->rtm_src_len != host_len) {
387 fprintf(fp, "from %s/%u ",
388 rt_addr_n2a_rta(family, tb[RTA_SRC]),
389 r->rtm_src_len);
390 } else {
391 fprintf(fp, "from %s ",
392 format_host_rta(family, tb[RTA_SRC]));
393 }
394 } else if (r->rtm_src_len) {
395 fprintf(fp, "from 0/%u ", r->rtm_src_len);
396 }
397 if (tb[RTA_NEWDST]) {
398 fprintf(fp, "as to %s ",
399 format_host_rta(r->rtm_family, tb[RTA_NEWDST]));
400 }
401
402 if (tb[RTA_ENCAP])
403 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
404
405 if (r->rtm_tos && filter.tosmask != -1) {
406 SPRINT_BUF(b1);
407 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
408 }
409
410 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
411 fprintf(fp, "via %s ",
412 format_host_rta(r->rtm_family, tb[RTA_GATEWAY]));
413 }
414 if (tb[RTA_VIA]) {
415 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
416 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
417
418 fprintf(fp, "via %s %s ",
419 family_name(via->rtvia_family),
420 format_host(via->rtvia_family, len, via->rtvia_addr));
421 }
422 if (tb[RTA_OIF] && filter.oifmask != -1)
423 fprintf(fp, "dev %s ", ll_index_to_name(rta_getattr_u32(tb[RTA_OIF])));
424
425 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
426 fprintf(fp, "table %s ", rtnl_rttable_n2a(table, b1, sizeof(b1)));
427 if (!(r->rtm_flags&RTM_F_CLONED)) {
428 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) && filter.protocolmask != -1)
429 fprintf(fp, "proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1)));
430 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) && filter.scopemask != -1)
431 fprintf(fp, "scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1)));
432 }
433 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
434 /* Do not use format_host(). It is our local addr
435 and symbolic name will not be useful.
436 */
437 fprintf(fp, "src %s ",
438 rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]));
439 }
440 if (tb[RTA_PRIORITY])
441 fprintf(fp, "metric %u ", rta_getattr_u32(tb[RTA_PRIORITY]));
442 if (r->rtm_flags & RTNH_F_DEAD)
443 fprintf(fp, "dead ");
444 if (r->rtm_flags & RTNH_F_ONLINK)
445 fprintf(fp, "onlink ");
446 if (r->rtm_flags & RTNH_F_PERVASIVE)
447 fprintf(fp, "pervasive ");
448 if (r->rtm_flags & RTNH_F_OFFLOAD)
449 fprintf(fp, "offload ");
450 if (r->rtm_flags & RTM_F_NOTIFY)
451 fprintf(fp, "notify ");
452 if (r->rtm_flags & RTNH_F_LINKDOWN)
453 fprintf(fp, "linkdown ");
454 if (r->rtm_flags & RTNH_F_UNRESOLVED)
455 fprintf(fp, "unresolved ");
456 if (tb[RTA_MARK]) {
457 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
458
459 if (mark) {
460 if (mark >= 16)
461 fprintf(fp, "mark 0x%x ", mark);
462 else
463 fprintf(fp, "mark %u ", mark);
464 }
465 }
466
467 if (tb[RTA_FLOW] && filter.realmmask != ~0U) {
468 __u32 to = rta_getattr_u32(tb[RTA_FLOW]);
469 __u32 from = to>>16;
470
471 to &= 0xFFFF;
472 fprintf(fp, "realm%s ", from ? "s" : "");
473 if (from) {
474 fprintf(fp, "%s/",
475 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
476 }
477 fprintf(fp, "%s ",
478 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
479 }
480
481 if (tb[RTA_UID])
482 fprintf(fp, "uid %u ", rta_getattr_u32(tb[RTA_UID]));
483
484 if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) {
485 __u32 flags = r->rtm_flags&~0xFFFF;
486 int first = 1;
487
488 fprintf(fp, "%s cache ", _SL_);
489
490 #define PRTFL(fl, flname) if (flags&RTCF_##fl) { \
491 flags &= ~RTCF_##fl; \
492 fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
493 first = 0; }
494 PRTFL(LOCAL, "local");
495 PRTFL(REJECT, "reject");
496 PRTFL(MULTICAST, "mc");
497 PRTFL(BROADCAST, "brd");
498 PRTFL(DNAT, "dst-nat");
499 PRTFL(SNAT, "src-nat");
500 PRTFL(MASQ, "masq");
501 PRTFL(DIRECTDST, "dst-direct");
502 PRTFL(DIRECTSRC, "src-direct");
503 PRTFL(REDIRECTED, "redirected");
504 PRTFL(DOREDIRECT, "redirect");
505 PRTFL(FAST, "fastroute");
506 PRTFL(NOTIFY, "notify");
507 PRTFL(TPROXY, "proxy");
508
509 if (flags)
510 fprintf(fp, "%s%x> ", first ? "<" : "", flags);
511 if (tb[RTA_CACHEINFO]) {
512 struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]);
513
514 if (!hz)
515 hz = get_user_hz();
516 if (ci->rta_expires != 0)
517 fprintf(fp, "expires %dsec ", ci->rta_expires/hz);
518 if (ci->rta_error != 0)
519 fprintf(fp, "error %d ", ci->rta_error);
520 if (show_stats) {
521 if (ci->rta_clntref)
522 fprintf(fp, "users %d ", ci->rta_clntref);
523 if (ci->rta_used != 0)
524 fprintf(fp, "used %d ", ci->rta_used);
525 if (ci->rta_lastuse != 0)
526 fprintf(fp, "age %dsec ", ci->rta_lastuse/hz);
527 }
528 if (ci->rta_id)
529 fprintf(fp, "ipid 0x%04x ", ci->rta_id);
530 if (ci->rta_ts || ci->rta_tsage)
531 fprintf(fp, "ts 0x%x tsage %dsec ",
532 ci->rta_ts, ci->rta_tsage);
533 }
534 } else if (r->rtm_family == AF_INET6) {
535 struct rta_cacheinfo *ci = NULL;
536
537 if (tb[RTA_CACHEINFO])
538 ci = RTA_DATA(tb[RTA_CACHEINFO]);
539 if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
540 if (!hz)
541 hz = get_user_hz();
542 if (r->rtm_flags & RTM_F_CLONED)
543 fprintf(fp, "%s cache ", _SL_);
544 if (ci->rta_expires)
545 fprintf(fp, "expires %dsec ", ci->rta_expires/hz);
546 if (ci->rta_error != 0)
547 fprintf(fp, "error %d ", ci->rta_error);
548 if (show_stats) {
549 if (ci->rta_clntref)
550 fprintf(fp, "users %d ", ci->rta_clntref);
551 if (ci->rta_used != 0)
552 fprintf(fp, "used %d ", ci->rta_used);
553 if (ci->rta_lastuse != 0)
554 fprintf(fp, "age %dsec ", ci->rta_lastuse/hz);
555 }
556 } else if (ci) {
557 if (ci->rta_error != 0)
558 fprintf(fp, "error %d ", ci->rta_error);
559 }
560 }
561 if (tb[RTA_METRICS]) {
562 int i;
563 unsigned int mxlock = 0;
564 struct rtattr *mxrta[RTAX_MAX+1];
565
566 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]),
567 RTA_PAYLOAD(tb[RTA_METRICS]));
568 if (mxrta[RTAX_LOCK])
569 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
570
571 for (i = 2; i <= RTAX_MAX; i++) {
572 __u32 val = 0U;
573
574 if (mxrta[i] == NULL)
575 continue;
576
577 if (i != RTAX_CC_ALGO)
578 val = rta_getattr_u32(mxrta[i]);
579
580 if (i == RTAX_HOPLIMIT && (int)val == -1)
581 continue;
582
583 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
584 fprintf(fp, "%s ", mx_names[i]);
585 else
586 fprintf(fp, "metric %d ", i);
587
588 if (mxlock & (1<<i))
589 fprintf(fp, "lock ");
590
591 switch (i) {
592 case RTAX_FEATURES:
593 print_rtax_features(fp, val);
594 break;
595 default:
596 fprintf(fp, "%u ", val);
597 break;
598
599 case RTAX_RTT:
600 case RTAX_RTTVAR:
601 case RTAX_RTO_MIN:
602 if (i == RTAX_RTT)
603 val /= 8;
604 else if (i == RTAX_RTTVAR)
605 val /= 4;
606
607 if (val >= 1000)
608 fprintf(fp, "%gs ", val/1e3);
609 else
610 fprintf(fp, "%ums ", val);
611 break;
612 case RTAX_CC_ALGO:
613 fprintf(fp, "%s ", rta_getattr_str(mxrta[i]));
614 break;
615 }
616 }
617 }
618 if (tb[RTA_IIF] && filter.iifmask != -1) {
619 fprintf(fp, "iif %s ",
620 ll_index_to_name(rta_getattr_u32(tb[RTA_IIF])));
621 }
622 if (tb[RTA_MULTIPATH]) {
623 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
624 int first = 0;
625
626 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
627
628 for (;;) {
629 if (len < sizeof(*nh))
630 break;
631 if (nh->rtnh_len > len)
632 break;
633 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
634 if (first)
635 fprintf(fp, "Oifs: ");
636 else
637 fprintf(fp, " ");
638 } else
639 fprintf(fp, "%s\tnexthop ", _SL_);
640 if (nh->rtnh_len > sizeof(*nh)) {
641 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh));
642
643 if (tb[RTA_ENCAP])
644 lwt_print_encap(fp,
645 tb[RTA_ENCAP_TYPE],
646 tb[RTA_ENCAP]);
647 if (tb[RTA_NEWDST]) {
648 fprintf(fp, "as to %s ",
649 format_host_rta(r->rtm_family,
650 tb[RTA_NEWDST]));
651 }
652 if (tb[RTA_GATEWAY]) {
653 fprintf(fp, "via %s ",
654 format_host_rta(r->rtm_family,
655 tb[RTA_GATEWAY]));
656 }
657 if (tb[RTA_VIA]) {
658 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
659 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
660
661 fprintf(fp, "via %s %s ",
662 family_name(via->rtvia_family),
663 format_host(via->rtvia_family, len, via->rtvia_addr));
664 }
665 if (tb[RTA_FLOW]) {
666 __u32 to = rta_getattr_u32(tb[RTA_FLOW]);
667 __u32 from = to>>16;
668
669 to &= 0xFFFF;
670 fprintf(fp, "realm%s ", from ? "s" : "");
671 if (from) {
672 fprintf(fp, "%s/",
673 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
674 }
675 fprintf(fp, "%s ",
676 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
677 }
678 }
679 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
680 fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
681 if (nh->rtnh_hops != 1)
682 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
683 fprintf(fp, " ");
684 } else {
685 fprintf(fp, "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
686 if (r->rtm_family != AF_MPLS)
687 fprintf(fp, "weight %d ",
688 nh->rtnh_hops+1);
689 }
690 if (nh->rtnh_flags & RTNH_F_DEAD)
691 fprintf(fp, "dead ");
692 if (nh->rtnh_flags & RTNH_F_ONLINK)
693 fprintf(fp, "onlink ");
694 if (nh->rtnh_flags & RTNH_F_PERVASIVE)
695 fprintf(fp, "pervasive ");
696 if (nh->rtnh_flags & RTNH_F_LINKDOWN)
697 fprintf(fp, "linkdown ");
698 len -= NLMSG_ALIGN(nh->rtnh_len);
699 nh = RTNH_NEXT(nh);
700 }
701 }
702 if (tb[RTA_PREF]) {
703 unsigned int pref = rta_getattr_u8(tb[RTA_PREF]);
704
705 fprintf(fp, "pref ");
706
707 switch (pref) {
708 case ICMPV6_ROUTER_PREF_LOW:
709 fprintf(fp, "low");
710 break;
711 case ICMPV6_ROUTER_PREF_MEDIUM:
712 fprintf(fp, "medium");
713 break;
714 case ICMPV6_ROUTER_PREF_HIGH:
715 fprintf(fp, "high");
716 break;
717 default:
718 fprintf(fp, "%u", pref);
719 }
720 }
721 if (tb[RTA_TTL_PROPAGATE]) {
722 fprintf(fp, "ttl-propagate ");
723 if (rta_getattr_u8(tb[RTA_TTL_PROPAGATE]))
724 fprintf(fp, "enabled");
725 else
726 fprintf(fp, "disabled");
727 }
728 fprintf(fp, "\n");
729 fflush(fp);
730 return 0;
731 }
732
733 static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
734 struct rtattr *rta, struct rtnexthop *rtnh,
735 int *argcp, char ***argvp)
736 {
737 int argc = *argcp;
738 char **argv = *argvp;
739
740 while (++argv, --argc > 0) {
741 if (strcmp(*argv, "via") == 0) {
742 inet_prefix addr;
743 int family;
744
745 NEXT_ARG();
746 family = read_family(*argv);
747 if (family == AF_UNSPEC)
748 family = r->rtm_family;
749 else
750 NEXT_ARG();
751 get_addr(&addr, *argv, family);
752 if (r->rtm_family == AF_UNSPEC)
753 r->rtm_family = addr.family;
754 if (addr.family == r->rtm_family) {
755 rta_addattr_l(rta, 4096, RTA_GATEWAY, &addr.data, addr.bytelen);
756 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
757 } else {
758 rta_addattr_l(rta, 4096, RTA_VIA, &addr.family, addr.bytelen+2);
759 rtnh->rtnh_len += RTA_SPACE(addr.bytelen+2);
760 }
761 } else if (strcmp(*argv, "dev") == 0) {
762 NEXT_ARG();
763 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
764 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
765 exit(1);
766 }
767 } else if (strcmp(*argv, "weight") == 0) {
768 unsigned int w;
769
770 NEXT_ARG();
771 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
772 invarg("\"weight\" is invalid\n", *argv);
773 rtnh->rtnh_hops = w - 1;
774 } else if (strcmp(*argv, "onlink") == 0) {
775 rtnh->rtnh_flags |= RTNH_F_ONLINK;
776 } else if (matches(*argv, "realms") == 0) {
777 __u32 realm;
778
779 NEXT_ARG();
780 if (get_rt_realms_or_raw(&realm, *argv))
781 invarg("\"realm\" value is invalid\n", *argv);
782 rta_addattr32(rta, 4096, RTA_FLOW, realm);
783 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
784 } else if (strcmp(*argv, "encap") == 0) {
785 int len = rta->rta_len;
786
787 lwt_parse_encap(rta, 4096, &argc, &argv);
788 rtnh->rtnh_len += rta->rta_len - len;
789 } else if (strcmp(*argv, "as") == 0) {
790 inet_prefix addr;
791
792 NEXT_ARG();
793 if (strcmp(*argv, "to") == 0)
794 NEXT_ARG();
795 get_addr(&addr, *argv, r->rtm_family);
796 rta_addattr_l(rta, 4096, RTA_NEWDST, &addr.data,
797 addr.bytelen);
798 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
799 } else
800 break;
801 }
802 *argcp = argc;
803 *argvp = argv;
804 return 0;
805 }
806
807 static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
808 int argc, char **argv)
809 {
810 char buf[1024];
811 struct rtattr *rta = (void *)buf;
812 struct rtnexthop *rtnh;
813
814 rta->rta_type = RTA_MULTIPATH;
815 rta->rta_len = RTA_LENGTH(0);
816 rtnh = RTA_DATA(rta);
817
818 while (argc > 0) {
819 if (strcmp(*argv, "nexthop") != 0) {
820 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
821 exit(-1);
822 }
823 if (argc <= 1) {
824 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
825 exit(-1);
826 }
827 memset(rtnh, 0, sizeof(*rtnh));
828 rtnh->rtnh_len = sizeof(*rtnh);
829 rta->rta_len += rtnh->rtnh_len;
830 parse_one_nh(n, r, rta, rtnh, &argc, &argv);
831 rtnh = RTNH_NEXT(rtnh);
832 }
833
834 if (rta->rta_len > RTA_LENGTH(0))
835 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
836 return 0;
837 }
838
839 static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
840 {
841 struct {
842 struct nlmsghdr n;
843 struct rtmsg r;
844 char buf[1024];
845 } req = {
846 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
847 .n.nlmsg_flags = NLM_F_REQUEST | flags,
848 .n.nlmsg_type = cmd,
849 .r.rtm_family = preferred_family,
850 .r.rtm_table = RT_TABLE_MAIN,
851 .r.rtm_scope = RT_SCOPE_NOWHERE,
852 };
853 char mxbuf[256];
854 struct rtattr *mxrta = (void *)mxbuf;
855 unsigned int mxlock = 0;
856 char *d = NULL;
857 int gw_ok = 0;
858 int dst_ok = 0;
859 int nhs_ok = 0;
860 int scope_ok = 0;
861 int table_ok = 0;
862 int raw = 0;
863 int type_ok = 0;
864
865 if (cmd != RTM_DELROUTE) {
866 req.r.rtm_protocol = RTPROT_BOOT;
867 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
868 req.r.rtm_type = RTN_UNICAST;
869 }
870
871 mxrta->rta_type = RTA_METRICS;
872 mxrta->rta_len = RTA_LENGTH(0);
873
874 while (argc > 0) {
875 if (strcmp(*argv, "src") == 0) {
876 inet_prefix addr;
877
878 NEXT_ARG();
879 get_addr(&addr, *argv, req.r.rtm_family);
880 if (req.r.rtm_family == AF_UNSPEC)
881 req.r.rtm_family = addr.family;
882 addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
883 } else if (strcmp(*argv, "as") == 0) {
884 inet_prefix addr;
885
886 NEXT_ARG();
887 if (strcmp(*argv, "to") == 0) {
888 NEXT_ARG();
889 }
890 get_addr(&addr, *argv, req.r.rtm_family);
891 if (req.r.rtm_family == AF_UNSPEC)
892 req.r.rtm_family = addr.family;
893 addattr_l(&req.n, sizeof(req), RTA_NEWDST, &addr.data, addr.bytelen);
894 } else if (strcmp(*argv, "via") == 0) {
895 inet_prefix addr;
896 int family;
897
898 if (gw_ok) {
899 invarg("use nexthop syntax to specify multiple via\n",
900 *argv);
901 }
902 gw_ok = 1;
903 NEXT_ARG();
904 family = read_family(*argv);
905 if (family == AF_UNSPEC)
906 family = req.r.rtm_family;
907 else
908 NEXT_ARG();
909 get_addr(&addr, *argv, family);
910 if (req.r.rtm_family == AF_UNSPEC)
911 req.r.rtm_family = addr.family;
912 if (addr.family == req.r.rtm_family)
913 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
914 &addr.data, addr.bytelen);
915 else
916 addattr_l(&req.n, sizeof(req), RTA_VIA,
917 &addr.family, addr.bytelen+2);
918 } else if (strcmp(*argv, "from") == 0) {
919 inet_prefix addr;
920
921 NEXT_ARG();
922 get_prefix(&addr, *argv, req.r.rtm_family);
923 if (req.r.rtm_family == AF_UNSPEC)
924 req.r.rtm_family = addr.family;
925 if (addr.bytelen)
926 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
927 req.r.rtm_src_len = addr.bitlen;
928 } else if (strcmp(*argv, "tos") == 0 ||
929 matches(*argv, "dsfield") == 0) {
930 __u32 tos;
931
932 NEXT_ARG();
933 if (rtnl_dsfield_a2n(&tos, *argv))
934 invarg("\"tos\" value is invalid\n", *argv);
935 req.r.rtm_tos = tos;
936 } else if (strcmp(*argv, "expires") == 0) {
937 __u32 expires;
938
939 NEXT_ARG();
940 if (get_u32(&expires, *argv, 0))
941 invarg("\"expires\" value is invalid\n", *argv);
942 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
943 } else if (matches(*argv, "metric") == 0 ||
944 matches(*argv, "priority") == 0 ||
945 strcmp(*argv, "preference") == 0) {
946 __u32 metric;
947
948 NEXT_ARG();
949 if (get_u32(&metric, *argv, 0))
950 invarg("\"metric\" value is invalid\n", *argv);
951 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
952 } else if (strcmp(*argv, "scope") == 0) {
953 __u32 scope = 0;
954
955 NEXT_ARG();
956 if (rtnl_rtscope_a2n(&scope, *argv))
957 invarg("invalid \"scope\" value\n", *argv);
958 req.r.rtm_scope = scope;
959 scope_ok = 1;
960 } else if (strcmp(*argv, "mtu") == 0) {
961 unsigned int mtu;
962
963 NEXT_ARG();
964 if (strcmp(*argv, "lock") == 0) {
965 mxlock |= (1<<RTAX_MTU);
966 NEXT_ARG();
967 }
968 if (get_unsigned(&mtu, *argv, 0))
969 invarg("\"mtu\" value is invalid\n", *argv);
970 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
971 } else if (strcmp(*argv, "hoplimit") == 0) {
972 unsigned int hoplimit;
973
974 NEXT_ARG();
975 if (strcmp(*argv, "lock") == 0) {
976 mxlock |= (1<<RTAX_HOPLIMIT);
977 NEXT_ARG();
978 }
979 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
980 invarg("\"hoplimit\" value is invalid\n", *argv);
981 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
982 } else if (strcmp(*argv, "advmss") == 0) {
983 unsigned int mss;
984
985 NEXT_ARG();
986 if (strcmp(*argv, "lock") == 0) {
987 mxlock |= (1<<RTAX_ADVMSS);
988 NEXT_ARG();
989 }
990 if (get_unsigned(&mss, *argv, 0))
991 invarg("\"mss\" value is invalid\n", *argv);
992 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
993 } else if (matches(*argv, "reordering") == 0) {
994 unsigned int reord;
995
996 NEXT_ARG();
997 if (strcmp(*argv, "lock") == 0) {
998 mxlock |= (1<<RTAX_REORDERING);
999 NEXT_ARG();
1000 }
1001 if (get_unsigned(&reord, *argv, 0))
1002 invarg("\"reordering\" value is invalid\n", *argv);
1003 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1004 } else if (strcmp(*argv, "rtt") == 0) {
1005 unsigned int rtt;
1006
1007 NEXT_ARG();
1008 if (strcmp(*argv, "lock") == 0) {
1009 mxlock |= (1<<RTAX_RTT);
1010 NEXT_ARG();
1011 }
1012 if (get_time_rtt(&rtt, *argv, &raw))
1013 invarg("\"rtt\" value is invalid\n", *argv);
1014 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1015 (raw) ? rtt : rtt * 8);
1016 } else if (strcmp(*argv, "rto_min") == 0) {
1017 unsigned int rto_min;
1018
1019 NEXT_ARG();
1020 mxlock |= (1<<RTAX_RTO_MIN);
1021 if (get_time_rtt(&rto_min, *argv, &raw))
1022 invarg("\"rto_min\" value is invalid\n",
1023 *argv);
1024 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1025 rto_min);
1026 } else if (matches(*argv, "window") == 0) {
1027 unsigned int win;
1028
1029 NEXT_ARG();
1030 if (strcmp(*argv, "lock") == 0) {
1031 mxlock |= (1<<RTAX_WINDOW);
1032 NEXT_ARG();
1033 }
1034 if (get_unsigned(&win, *argv, 0))
1035 invarg("\"window\" value is invalid\n", *argv);
1036 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1037 } else if (matches(*argv, "cwnd") == 0) {
1038 unsigned int win;
1039
1040 NEXT_ARG();
1041 if (strcmp(*argv, "lock") == 0) {
1042 mxlock |= (1<<RTAX_CWND);
1043 NEXT_ARG();
1044 }
1045 if (get_unsigned(&win, *argv, 0))
1046 invarg("\"cwnd\" value is invalid\n", *argv);
1047 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1048 } else if (matches(*argv, "initcwnd") == 0) {
1049 unsigned int win;
1050
1051 NEXT_ARG();
1052 if (strcmp(*argv, "lock") == 0) {
1053 mxlock |= (1<<RTAX_INITCWND);
1054 NEXT_ARG();
1055 }
1056 if (get_unsigned(&win, *argv, 0))
1057 invarg("\"initcwnd\" value is invalid\n", *argv);
1058 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITCWND, win);
1059 } else if (matches(*argv, "initrwnd") == 0) {
1060 unsigned int win;
1061
1062 NEXT_ARG();
1063 if (strcmp(*argv, "lock") == 0) {
1064 mxlock |= (1<<RTAX_INITRWND);
1065 NEXT_ARG();
1066 }
1067 if (get_unsigned(&win, *argv, 0))
1068 invarg("\"initrwnd\" value is invalid\n", *argv);
1069 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITRWND, win);
1070 } else if (matches(*argv, "features") == 0) {
1071 unsigned int features = 0;
1072
1073 while (argc > 0) {
1074 NEXT_ARG();
1075
1076 if (strcmp(*argv, "ecn") == 0)
1077 features |= RTAX_FEATURE_ECN;
1078 else
1079 invarg("\"features\" value not valid\n", *argv);
1080 break;
1081 }
1082
1083 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FEATURES, features);
1084 } else if (matches(*argv, "quickack") == 0) {
1085 unsigned int quickack;
1086
1087 NEXT_ARG();
1088 if (get_unsigned(&quickack, *argv, 0))
1089 invarg("\"quickack\" value is invalid\n", *argv);
1090 if (quickack != 1 && quickack != 0)
1091 invarg("\"quickack\" value should be 0 or 1\n", *argv);
1092 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_QUICKACK, quickack);
1093 } else if (matches(*argv, "congctl") == 0) {
1094 NEXT_ARG();
1095 if (strcmp(*argv, "lock") == 0) {
1096 mxlock |= 1 << RTAX_CC_ALGO;
1097 NEXT_ARG();
1098 }
1099 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1100 strlen(*argv));
1101 } else if (matches(*argv, "rttvar") == 0) {
1102 unsigned int win;
1103
1104 NEXT_ARG();
1105 if (strcmp(*argv, "lock") == 0) {
1106 mxlock |= (1<<RTAX_RTTVAR);
1107 NEXT_ARG();
1108 }
1109 if (get_time_rtt(&win, *argv, &raw))
1110 invarg("\"rttvar\" value is invalid\n", *argv);
1111 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1112 (raw) ? win : win * 4);
1113 } else if (matches(*argv, "ssthresh") == 0) {
1114 unsigned int win;
1115
1116 NEXT_ARG();
1117 if (strcmp(*argv, "lock") == 0) {
1118 mxlock |= (1<<RTAX_SSTHRESH);
1119 NEXT_ARG();
1120 }
1121 if (get_unsigned(&win, *argv, 0))
1122 invarg("\"ssthresh\" value is invalid\n", *argv);
1123 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1124 } else if (matches(*argv, "realms") == 0) {
1125 __u32 realm;
1126
1127 NEXT_ARG();
1128 if (get_rt_realms_or_raw(&realm, *argv))
1129 invarg("\"realm\" value is invalid\n", *argv);
1130 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1131 } else if (strcmp(*argv, "onlink") == 0) {
1132 req.r.rtm_flags |= RTNH_F_ONLINK;
1133 } else if (strcmp(*argv, "nexthop") == 0) {
1134 nhs_ok = 1;
1135 break;
1136 } else if (matches(*argv, "protocol") == 0) {
1137 __u32 prot;
1138
1139 NEXT_ARG();
1140 if (rtnl_rtprot_a2n(&prot, *argv))
1141 invarg("\"protocol\" value is invalid\n", *argv);
1142 req.r.rtm_protocol = prot;
1143 } else if (matches(*argv, "table") == 0) {
1144 __u32 tid;
1145
1146 NEXT_ARG();
1147 if (rtnl_rttable_a2n(&tid, *argv))
1148 invarg("\"table\" value is invalid\n", *argv);
1149 if (tid < 256)
1150 req.r.rtm_table = tid;
1151 else {
1152 req.r.rtm_table = RT_TABLE_UNSPEC;
1153 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1154 }
1155 table_ok = 1;
1156 } else if (matches(*argv, "vrf") == 0) {
1157 __u32 tid;
1158
1159 NEXT_ARG();
1160 tid = ipvrf_get_table(*argv);
1161 if (tid == 0)
1162 invarg("Invalid VRF\n", *argv);
1163 if (tid < 256)
1164 req.r.rtm_table = tid;
1165 else {
1166 req.r.rtm_table = RT_TABLE_UNSPEC;
1167 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1168 }
1169 table_ok = 1;
1170 } else if (strcmp(*argv, "dev") == 0 ||
1171 strcmp(*argv, "oif") == 0) {
1172 NEXT_ARG();
1173 d = *argv;
1174 } else if (matches(*argv, "pref") == 0) {
1175 __u8 pref;
1176
1177 NEXT_ARG();
1178 if (strcmp(*argv, "low") == 0)
1179 pref = ICMPV6_ROUTER_PREF_LOW;
1180 else if (strcmp(*argv, "medium") == 0)
1181 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1182 else if (strcmp(*argv, "high") == 0)
1183 pref = ICMPV6_ROUTER_PREF_HIGH;
1184 else if (get_u8(&pref, *argv, 0))
1185 invarg("\"pref\" value is invalid\n", *argv);
1186 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1187 } else if (strcmp(*argv, "encap") == 0) {
1188 char buf[1024];
1189 struct rtattr *rta = (void *)buf;
1190
1191 rta->rta_type = RTA_ENCAP;
1192 rta->rta_len = RTA_LENGTH(0);
1193
1194 lwt_parse_encap(rta, sizeof(buf), &argc, &argv);
1195
1196 if (rta->rta_len > RTA_LENGTH(0))
1197 addraw_l(&req.n, 1024, RTA_DATA(rta), RTA_PAYLOAD(rta));
1198 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1199 __u8 ttl_prop;
1200
1201 NEXT_ARG();
1202 if (matches(*argv, "enabled") == 0)
1203 ttl_prop = 1;
1204 else if (matches(*argv, "disabled") == 0)
1205 ttl_prop = 0;
1206 else
1207 invarg("\"ttl-propagate\" value is invalid\n",
1208 *argv);
1209
1210 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1211 ttl_prop);
1212 } else {
1213 int type;
1214 inet_prefix dst;
1215
1216 if (strcmp(*argv, "to") == 0) {
1217 NEXT_ARG();
1218 }
1219 if ((**argv < '0' || **argv > '9') &&
1220 rtnl_rtntype_a2n(&type, *argv) == 0) {
1221 NEXT_ARG();
1222 req.r.rtm_type = type;
1223 type_ok = 1;
1224 }
1225
1226 if (matches(*argv, "help") == 0)
1227 usage();
1228 if (dst_ok)
1229 duparg2("to", *argv);
1230 get_prefix(&dst, *argv, req.r.rtm_family);
1231 if (req.r.rtm_family == AF_UNSPEC)
1232 req.r.rtm_family = dst.family;
1233 req.r.rtm_dst_len = dst.bitlen;
1234 dst_ok = 1;
1235 if (dst.bytelen)
1236 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
1237 }
1238 argc--; argv++;
1239 }
1240
1241 if (!dst_ok)
1242 usage();
1243
1244 if (d) {
1245 int idx;
1246
1247 if ((idx = ll_name_to_index(d)) == 0) {
1248 fprintf(stderr, "Cannot find device \"%s\"\n", d);
1249 return -1;
1250 }
1251 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1252 }
1253
1254 if (mxrta->rta_len > RTA_LENGTH(0)) {
1255 if (mxlock)
1256 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1257 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1258 }
1259
1260 if (nhs_ok)
1261 parse_nexthops(&req.n, &req.r, argc, argv);
1262
1263 if (req.r.rtm_family == AF_UNSPEC)
1264 req.r.rtm_family = AF_INET;
1265
1266 if (!table_ok) {
1267 if (req.r.rtm_type == RTN_LOCAL ||
1268 req.r.rtm_type == RTN_BROADCAST ||
1269 req.r.rtm_type == RTN_NAT ||
1270 req.r.rtm_type == RTN_ANYCAST)
1271 req.r.rtm_table = RT_TABLE_LOCAL;
1272 }
1273 if (!scope_ok) {
1274 if (req.r.rtm_family == AF_INET6 ||
1275 req.r.rtm_family == AF_MPLS)
1276 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1277 else if (req.r.rtm_type == RTN_LOCAL ||
1278 req.r.rtm_type == RTN_NAT)
1279 req.r.rtm_scope = RT_SCOPE_HOST;
1280 else if (req.r.rtm_type == RTN_BROADCAST ||
1281 req.r.rtm_type == RTN_MULTICAST ||
1282 req.r.rtm_type == RTN_ANYCAST)
1283 req.r.rtm_scope = RT_SCOPE_LINK;
1284 else if (req.r.rtm_type == RTN_UNICAST ||
1285 req.r.rtm_type == RTN_UNSPEC) {
1286 if (cmd == RTM_DELROUTE)
1287 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1288 else if (!gw_ok && !nhs_ok)
1289 req.r.rtm_scope = RT_SCOPE_LINK;
1290 }
1291 }
1292
1293 if (!type_ok && req.r.rtm_family == AF_MPLS)
1294 req.r.rtm_type = RTN_UNICAST;
1295
1296 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
1297 return -2;
1298
1299 return 0;
1300 }
1301
1302 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
1303 {
1304 struct {
1305 struct nlmsghdr nlh;
1306 struct rtmsg rtm;
1307 } req = {
1308 .nlh.nlmsg_len = sizeof(req),
1309 .nlh.nlmsg_type = RTM_GETROUTE,
1310 .nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST,
1311 .nlh.nlmsg_seq = rth->dump = ++rth->seq,
1312 .rtm.rtm_family = family,
1313 .rtm.rtm_flags = RTM_F_CLONED,
1314 };
1315 struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
1316
1317 return sendto(rth->fd, (void *)&req, sizeof(req), 0, (struct sockaddr *)&nladdr, sizeof(nladdr));
1318 }
1319
1320 static int iproute_flush_cache(void)
1321 {
1322 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1323
1324 int len;
1325 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1326 char *buffer = "-1";
1327
1328 if (flush_fd < 0) {
1329 fprintf(stderr, "Cannot open \"%s\": %s\n",
1330 ROUTE_FLUSH_PATH, strerror(errno));
1331 return -1;
1332 }
1333
1334 len = strlen(buffer);
1335
1336 if ((write(flush_fd, (void *)buffer, len)) < len) {
1337 fprintf(stderr, "Cannot flush routing cache\n");
1338 close(flush_fd);
1339 return -1;
1340 }
1341 close(flush_fd);
1342 return 0;
1343 }
1344
1345 static __u32 route_dump_magic = 0x45311224;
1346
1347 static int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n,
1348 void *arg)
1349 {
1350 int ret;
1351 int len = n->nlmsg_len;
1352 struct rtmsg *r = NLMSG_DATA(n);
1353 struct rtattr *tb[RTA_MAX+1];
1354 int host_len;
1355
1356 host_len = af_bit_len(r->rtm_family);
1357 len -= NLMSG_LENGTH(sizeof(*r));
1358 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1359
1360 if (!filter_nlmsg(n, tb, host_len))
1361 return 0;
1362
1363 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1364 if ((ret > 0) && (ret != n->nlmsg_len)) {
1365 fprintf(stderr, "Short write while saving nlmsg\n");
1366 ret = -EIO;
1367 }
1368
1369 return ret == n->nlmsg_len ? 0 : ret;
1370 }
1371
1372 static int save_route_prep(void)
1373 {
1374 int ret;
1375
1376 if (isatty(STDOUT_FILENO)) {
1377 fprintf(stderr, "Not sending a binary stream to stdout\n");
1378 return -1;
1379 }
1380
1381 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1382 if (ret != sizeof(route_dump_magic)) {
1383 fprintf(stderr, "Can't write magic to dump file\n");
1384 return -1;
1385 }
1386
1387 return 0;
1388 }
1389
1390 static int iproute_list_flush_or_save(int argc, char **argv, int action)
1391 {
1392 int do_ipv6 = preferred_family;
1393 char *id = NULL;
1394 char *od = NULL;
1395 unsigned int mark = 0;
1396 rtnl_filter_t filter_fn;
1397
1398 if (action == IPROUTE_SAVE) {
1399 if (save_route_prep())
1400 return -1;
1401
1402 filter_fn = save_route;
1403 } else
1404 filter_fn = print_route;
1405
1406 iproute_reset_filter(0);
1407 filter.tb = RT_TABLE_MAIN;
1408
1409 if ((action == IPROUTE_FLUSH) && argc <= 0) {
1410 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1411 return -1;
1412 }
1413
1414 while (argc > 0) {
1415 if (matches(*argv, "table") == 0) {
1416 __u32 tid;
1417
1418 NEXT_ARG();
1419 if (rtnl_rttable_a2n(&tid, *argv)) {
1420 if (strcmp(*argv, "all") == 0) {
1421 filter.tb = 0;
1422 } else if (strcmp(*argv, "cache") == 0) {
1423 filter.cloned = 1;
1424 } else if (strcmp(*argv, "help") == 0) {
1425 usage();
1426 } else {
1427 invarg("table id value is invalid\n", *argv);
1428 }
1429 } else
1430 filter.tb = tid;
1431 } else if (matches(*argv, "vrf") == 0) {
1432 __u32 tid;
1433
1434 NEXT_ARG();
1435 tid = ipvrf_get_table(*argv);
1436 if (tid == 0)
1437 invarg("Invalid VRF\n", *argv);
1438 filter.tb = tid;
1439 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1440 } else if (matches(*argv, "cached") == 0 ||
1441 matches(*argv, "cloned") == 0) {
1442 filter.cloned = 1;
1443 } else if (strcmp(*argv, "tos") == 0 ||
1444 matches(*argv, "dsfield") == 0) {
1445 __u32 tos;
1446
1447 NEXT_ARG();
1448 if (rtnl_dsfield_a2n(&tos, *argv))
1449 invarg("TOS value is invalid\n", *argv);
1450 filter.tos = tos;
1451 filter.tosmask = -1;
1452 } else if (matches(*argv, "protocol") == 0) {
1453 __u32 prot = 0;
1454
1455 NEXT_ARG();
1456 filter.protocolmask = -1;
1457 if (rtnl_rtprot_a2n(&prot, *argv)) {
1458 if (strcmp(*argv, "all") != 0)
1459 invarg("invalid \"protocol\"\n", *argv);
1460 prot = 0;
1461 filter.protocolmask = 0;
1462 }
1463 filter.protocol = prot;
1464 } else if (matches(*argv, "scope") == 0) {
1465 __u32 scope = 0;
1466
1467 NEXT_ARG();
1468 filter.scopemask = -1;
1469 if (rtnl_rtscope_a2n(&scope, *argv)) {
1470 if (strcmp(*argv, "all") != 0)
1471 invarg("invalid \"scope\"\n", *argv);
1472 scope = RT_SCOPE_NOWHERE;
1473 filter.scopemask = 0;
1474 }
1475 filter.scope = scope;
1476 } else if (matches(*argv, "type") == 0) {
1477 int type;
1478
1479 NEXT_ARG();
1480 if (rtnl_rtntype_a2n(&type, *argv))
1481 invarg("node type value is invalid\n", *argv);
1482 filter.typemask = (1<<type);
1483 } else if (strcmp(*argv, "dev") == 0 ||
1484 strcmp(*argv, "oif") == 0) {
1485 NEXT_ARG();
1486 od = *argv;
1487 } else if (strcmp(*argv, "iif") == 0) {
1488 NEXT_ARG();
1489 id = *argv;
1490 } else if (strcmp(*argv, "mark") == 0) {
1491 NEXT_ARG();
1492 get_unsigned(&mark, *argv, 0);
1493 filter.markmask = -1;
1494 } else if (strcmp(*argv, "via") == 0) {
1495 int family;
1496
1497 NEXT_ARG();
1498 family = read_family(*argv);
1499 if (family == AF_UNSPEC)
1500 family = do_ipv6;
1501 else
1502 NEXT_ARG();
1503 get_prefix(&filter.rvia, *argv, family);
1504 } else if (strcmp(*argv, "src") == 0) {
1505 NEXT_ARG();
1506 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1507 } else if (matches(*argv, "realms") == 0) {
1508 __u32 realm;
1509
1510 NEXT_ARG();
1511 if (get_rt_realms_or_raw(&realm, *argv))
1512 invarg("invalid realms\n", *argv);
1513 filter.realm = realm;
1514 filter.realmmask = ~0U;
1515 if ((filter.realm&0xFFFF) == 0 &&
1516 (*argv)[strlen(*argv) - 1] == '/')
1517 filter.realmmask &= ~0xFFFF;
1518 if ((filter.realm&0xFFFF0000U) == 0 &&
1519 (strchr(*argv, '/') == NULL ||
1520 (*argv)[0] == '/'))
1521 filter.realmmask &= ~0xFFFF0000U;
1522 } else if (matches(*argv, "from") == 0) {
1523 NEXT_ARG();
1524 if (matches(*argv, "root") == 0) {
1525 NEXT_ARG();
1526 get_prefix(&filter.rsrc, *argv, do_ipv6);
1527 } else if (matches(*argv, "match") == 0) {
1528 NEXT_ARG();
1529 get_prefix(&filter.msrc, *argv, do_ipv6);
1530 } else {
1531 if (matches(*argv, "exact") == 0) {
1532 NEXT_ARG();
1533 }
1534 get_prefix(&filter.msrc, *argv, do_ipv6);
1535 filter.rsrc = filter.msrc;
1536 }
1537 } else {
1538 if (matches(*argv, "to") == 0) {
1539 NEXT_ARG();
1540 }
1541 if (matches(*argv, "root") == 0) {
1542 NEXT_ARG();
1543 get_prefix(&filter.rdst, *argv, do_ipv6);
1544 } else if (matches(*argv, "match") == 0) {
1545 NEXT_ARG();
1546 get_prefix(&filter.mdst, *argv, do_ipv6);
1547 } else {
1548 if (matches(*argv, "exact") == 0) {
1549 NEXT_ARG();
1550 }
1551 get_prefix(&filter.mdst, *argv, do_ipv6);
1552 filter.rdst = filter.mdst;
1553 }
1554 }
1555 argc--; argv++;
1556 }
1557
1558 if (do_ipv6 == AF_UNSPEC && filter.tb)
1559 do_ipv6 = AF_INET;
1560
1561 if (id || od) {
1562 int idx;
1563
1564 if (id) {
1565 if ((idx = ll_name_to_index(id)) == 0) {
1566 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1567 return -1;
1568 }
1569 filter.iif = idx;
1570 filter.iifmask = -1;
1571 }
1572 if (od) {
1573 if ((idx = ll_name_to_index(od)) == 0) {
1574 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1575 return -1;
1576 }
1577 filter.oif = idx;
1578 filter.oifmask = -1;
1579 }
1580 }
1581 filter.mark = mark;
1582
1583 if (action == IPROUTE_FLUSH) {
1584 int round = 0;
1585 char flushb[4096-512];
1586 time_t start = time(0);
1587
1588 if (filter.cloned) {
1589 if (do_ipv6 != AF_INET6) {
1590 iproute_flush_cache();
1591 if (show_stats)
1592 printf("*** IPv4 routing cache is flushed.\n");
1593 }
1594 if (do_ipv6 == AF_INET)
1595 return 0;
1596 }
1597
1598 filter.flushb = flushb;
1599 filter.flushp = 0;
1600 filter.flushe = sizeof(flushb);
1601
1602 for (;;) {
1603 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1604 perror("Cannot send dump request");
1605 exit(1);
1606 }
1607 filter.flushed = 0;
1608 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1609 fprintf(stderr, "Flush terminated\n");
1610 exit(1);
1611 }
1612 if (filter.flushed == 0) {
1613 if (show_stats) {
1614 if (round == 0 && (!filter.cloned || do_ipv6 == AF_INET6))
1615 printf("Nothing to flush.\n");
1616 else
1617 printf("*** Flush is complete after %d round%s ***\n", round, round > 1?"s":"");
1618 }
1619 fflush(stdout);
1620 return 0;
1621 }
1622 round++;
1623 if (flush_update() < 0)
1624 exit(1);
1625
1626 if (time(0) - start > 30) {
1627 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1628 (long)(time(0) - start), filter.flushed);
1629 exit(1);
1630 }
1631
1632 if (show_stats) {
1633 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1634 fflush(stdout);
1635 }
1636 }
1637 }
1638
1639 if (!filter.cloned) {
1640 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1641 perror("Cannot send dump request");
1642 exit(1);
1643 }
1644 } else {
1645 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1646 perror("Cannot send dump request");
1647 exit(1);
1648 }
1649 }
1650
1651 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1652 fprintf(stderr, "Dump terminated\n");
1653 exit(1);
1654 }
1655
1656 exit(0);
1657 }
1658
1659
1660 static int iproute_get(int argc, char **argv)
1661 {
1662 struct {
1663 struct nlmsghdr n;
1664 struct rtmsg r;
1665 char buf[1024];
1666 } req = {
1667 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1668 .n.nlmsg_flags = NLM_F_REQUEST,
1669 .n.nlmsg_type = RTM_GETROUTE,
1670 .r.rtm_family = preferred_family,
1671 };
1672 char *idev = NULL;
1673 char *odev = NULL;
1674 int connected = 0;
1675 int from_ok = 0;
1676 unsigned int mark = 0;
1677
1678 iproute_reset_filter(0);
1679 filter.cloned = 2;
1680
1681 while (argc > 0) {
1682 if (strcmp(*argv, "tos") == 0 ||
1683 matches(*argv, "dsfield") == 0) {
1684 __u32 tos;
1685
1686 NEXT_ARG();
1687 if (rtnl_dsfield_a2n(&tos, *argv))
1688 invarg("TOS value is invalid\n", *argv);
1689 req.r.rtm_tos = tos;
1690 } else if (matches(*argv, "from") == 0) {
1691 inet_prefix addr;
1692
1693 NEXT_ARG();
1694 if (matches(*argv, "help") == 0)
1695 usage();
1696 from_ok = 1;
1697 get_prefix(&addr, *argv, req.r.rtm_family);
1698 if (req.r.rtm_family == AF_UNSPEC)
1699 req.r.rtm_family = addr.family;
1700 if (addr.bytelen)
1701 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1702 req.r.rtm_src_len = addr.bitlen;
1703 } else if (matches(*argv, "iif") == 0) {
1704 NEXT_ARG();
1705 idev = *argv;
1706 } else if (matches(*argv, "mark") == 0) {
1707 NEXT_ARG();
1708 get_unsigned(&mark, *argv, 0);
1709 } else if (matches(*argv, "oif") == 0 ||
1710 strcmp(*argv, "dev") == 0) {
1711 NEXT_ARG();
1712 odev = *argv;
1713 } else if (matches(*argv, "notify") == 0) {
1714 req.r.rtm_flags |= RTM_F_NOTIFY;
1715 } else if (matches(*argv, "connected") == 0) {
1716 connected = 1;
1717 } else if (matches(*argv, "vrf") == 0) {
1718 NEXT_ARG();
1719 if (!name_is_vrf(*argv))
1720 invarg("Invalid VRF\n", *argv);
1721 odev = *argv;
1722 } else if (matches(*argv, "uid") == 0) {
1723 uid_t uid;
1724
1725 NEXT_ARG();
1726 if (get_unsigned(&uid, *argv, 0))
1727 invarg("invalid UID\n", *argv);
1728 addattr32(&req.n, sizeof(req), RTA_UID, uid);
1729 } else {
1730 inet_prefix addr;
1731
1732 if (strcmp(*argv, "to") == 0) {
1733 NEXT_ARG();
1734 }
1735 if (matches(*argv, "help") == 0)
1736 usage();
1737 get_prefix(&addr, *argv, req.r.rtm_family);
1738 if (req.r.rtm_family == AF_UNSPEC)
1739 req.r.rtm_family = addr.family;
1740 if (addr.bytelen)
1741 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1742 req.r.rtm_dst_len = addr.bitlen;
1743 }
1744 argc--; argv++;
1745 }
1746
1747 if (req.r.rtm_dst_len == 0) {
1748 fprintf(stderr, "need at least a destination address\n");
1749 exit(1);
1750 }
1751
1752 if (idev || odev) {
1753 int idx;
1754
1755 if (idev) {
1756 if ((idx = ll_name_to_index(idev)) == 0) {
1757 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1758 return -1;
1759 }
1760 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1761 }
1762 if (odev) {
1763 if ((idx = ll_name_to_index(odev)) == 0) {
1764 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1765 return -1;
1766 }
1767 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1768 }
1769 }
1770 if (mark)
1771 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
1772
1773 if (req.r.rtm_family == AF_UNSPEC)
1774 req.r.rtm_family = AF_INET;
1775
1776 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
1777
1778 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
1779 return -2;
1780
1781 if (connected && !from_ok) {
1782 struct rtmsg *r = NLMSG_DATA(&req.n);
1783 int len = req.n.nlmsg_len;
1784 struct rtattr *tb[RTA_MAX+1];
1785
1786 if (print_route(NULL, &req.n, (void *)stdout) < 0) {
1787 fprintf(stderr, "An error :-)\n");
1788 return -1;
1789 }
1790
1791 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1792 fprintf(stderr, "Not a route?\n");
1793 return -1;
1794 }
1795 len -= NLMSG_LENGTH(sizeof(*r));
1796 if (len < 0) {
1797 fprintf(stderr, "Wrong len %d\n", len);
1798 return -1;
1799 }
1800
1801 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1802
1803 if (tb[RTA_PREFSRC]) {
1804 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1805 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1806 } else if (!tb[RTA_SRC]) {
1807 fprintf(stderr, "Failed to connect the route\n");
1808 return -1;
1809 }
1810 if (!odev && tb[RTA_OIF])
1811 tb[RTA_OIF]->rta_type = 0;
1812 if (tb[RTA_GATEWAY])
1813 tb[RTA_GATEWAY]->rta_type = 0;
1814 if (tb[RTA_VIA])
1815 tb[RTA_VIA]->rta_type = 0;
1816 if (!idev && tb[RTA_IIF])
1817 tb[RTA_IIF]->rta_type = 0;
1818 req.n.nlmsg_flags = NLM_F_REQUEST;
1819 req.n.nlmsg_type = RTM_GETROUTE;
1820
1821 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
1822 return -2;
1823 }
1824
1825 if (print_route(NULL, &req.n, (void *)stdout) < 0) {
1826 fprintf(stderr, "An error :-)\n");
1827 return -1;
1828 }
1829
1830 return 0;
1831 }
1832
1833 static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
1834 {
1835 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
1836 return 1;
1837
1838 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
1839 }
1840
1841 static int restore_handler(const struct sockaddr_nl *nl,
1842 struct rtnl_ctrl_data *ctrl,
1843 struct nlmsghdr *n, void *arg)
1844 {
1845 struct rtmsg *r = NLMSG_DATA(n);
1846 struct rtattr *tb[RTA_MAX+1];
1847 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
1848 int ret, prio = *(int *)arg;
1849
1850 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1851
1852 /* Restore routes in correct order:
1853 * 0. ones for local addresses,
1854 * 1. ones for local networks,
1855 * 2. others (remote networks/hosts).
1856 */
1857 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
1858 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
1859 goto restore;
1860 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
1861 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
1862 goto restore;
1863 else if (prio == 2 && tb[RTA_GATEWAY])
1864 goto restore;
1865
1866 return 0;
1867
1868 restore:
1869 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
1870
1871 ll_init_map(&rth);
1872
1873 ret = rtnl_talk(&rth, n, n, sizeof(*n));
1874 if ((ret < 0) && (errno == EEXIST))
1875 ret = 0;
1876
1877 return ret;
1878 }
1879
1880 static int route_dump_check_magic(void)
1881 {
1882 int ret;
1883 __u32 magic = 0;
1884
1885 if (isatty(STDIN_FILENO)) {
1886 fprintf(stderr, "Can't restore route dump from a terminal\n");
1887 return -1;
1888 }
1889
1890 ret = fread(&magic, sizeof(magic), 1, stdin);
1891 if (magic != route_dump_magic) {
1892 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
1893 return -1;
1894 }
1895
1896 return 0;
1897 }
1898
1899 static int iproute_restore(void)
1900 {
1901 int pos, prio;
1902
1903 if (route_dump_check_magic())
1904 exit(-1);
1905
1906 pos = ftell(stdin);
1907 if (pos == -1) {
1908 perror("Failed to restore: ftell");
1909 exit(-1);
1910 }
1911
1912 for (prio = 0; prio < 3; prio++) {
1913 int err;
1914
1915 err = rtnl_from_file(stdin, &restore_handler, &prio);
1916 if (err)
1917 exit(err);
1918
1919 if (fseek(stdin, pos, SEEK_SET) == -1) {
1920 perror("Failed to restore: fseek");
1921 exit(-1);
1922 }
1923 }
1924
1925 exit(0);
1926 }
1927
1928 static int show_handler(const struct sockaddr_nl *nl,
1929 struct rtnl_ctrl_data *ctrl,
1930 struct nlmsghdr *n, void *arg)
1931 {
1932 print_route(nl, n, stdout);
1933 return 0;
1934 }
1935
1936 static int iproute_showdump(void)
1937 {
1938 if (route_dump_check_magic())
1939 exit(-1);
1940
1941 exit(rtnl_from_file(stdin, &show_handler, NULL));
1942 }
1943
1944 void iproute_reset_filter(int ifindex)
1945 {
1946 memset(&filter, 0, sizeof(filter));
1947 filter.mdst.bitlen = -1;
1948 filter.msrc.bitlen = -1;
1949 filter.oif = ifindex;
1950 if (filter.oif > 0)
1951 filter.oifmask = -1;
1952 }
1953
1954 int do_iproute(int argc, char **argv)
1955 {
1956 if (argc < 1)
1957 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
1958
1959 if (matches(*argv, "add") == 0)
1960 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1961 argc-1, argv+1);
1962 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1963 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1964 argc-1, argv+1);
1965 if (matches(*argv, "replace") == 0)
1966 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1967 argc-1, argv+1);
1968 if (matches(*argv, "prepend") == 0)
1969 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1970 argc-1, argv+1);
1971 if (matches(*argv, "append") == 0)
1972 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
1973 argc-1, argv+1);
1974 if (matches(*argv, "test") == 0)
1975 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
1976 argc-1, argv+1);
1977 if (matches(*argv, "delete") == 0)
1978 return iproute_modify(RTM_DELROUTE, 0,
1979 argc-1, argv+1);
1980 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
1981 || matches(*argv, "lst") == 0)
1982 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
1983 if (matches(*argv, "get") == 0)
1984 return iproute_get(argc-1, argv+1);
1985 if (matches(*argv, "flush") == 0)
1986 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
1987 if (matches(*argv, "save") == 0)
1988 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
1989 if (matches(*argv, "restore") == 0)
1990 return iproute_restore();
1991 if (matches(*argv, "showdump") == 0)
1992 return iproute_showdump();
1993 if (matches(*argv, "help") == 0)
1994 usage();
1995 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
1996 exit(-1);
1997 }
Upstream mirror of iproute2