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[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 [ ROUTE_GET_FLAGS ] ADDRESS\n");
69 fprintf(stderr, " [ from ADDRESS iif STRING ]\n");
70 fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n");
71 fprintf(stderr, " [ mark NUMBER ] [ vrf NAME ]\n");
72 fprintf(stderr, " [ uid NUMBER ]\n");
73 fprintf(stderr, " ip route { add | del | change | append | replace } ROUTE\n");
74 fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n");
75 fprintf(stderr, " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n");
76 fprintf(stderr, " [ type TYPE ] [ scope SCOPE ]\n");
77 fprintf(stderr, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n");
78 fprintf(stderr, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n");
79 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n");
80 fprintf(stderr, " [ scope SCOPE ] [ metric METRIC ]\n");
81 fprintf(stderr, " [ ttl-propagate { enabled | disabled } ]\n");
82 fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n");
83 fprintf(stderr, "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n");
84 fprintf(stderr, " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n");
85 fprintf(stderr, "FAMILY := [ inet | inet6 | ipx | dnet | mpls | bridge | link ]\n");
86 fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n");
87 fprintf(stderr, " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n");
88 fprintf(stderr, " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n");
89 fprintf(stderr, " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n");
90 fprintf(stderr, " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n");
91 fprintf(stderr, " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n");
92 fprintf(stderr, " [ pref PREF ] [ expires TIME ]\n");
93 fprintf(stderr, "TYPE := { unicast | local | broadcast | multicast | throw |\n");
94 fprintf(stderr, " unreachable | prohibit | blackhole | nat }\n");
95 fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
96 fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n");
97 fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n");
98 fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n");
99 fprintf(stderr, "PREF := [ low | medium | high ]\n");
100 fprintf(stderr, "TIME := NUMBER[s|ms]\n");
101 fprintf(stderr, "BOOL := [1|0]\n");
102 fprintf(stderr, "FEATURES := ecn\n");
103 fprintf(stderr, "ENCAPTYPE := [ mpls | ip | ip6 | seg6 ]\n");
104 fprintf(stderr, "ENCAPHDR := [ MPLSLABEL | SEG6HDR ]\n");
105 fprintf(stderr, "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n");
106 fprintf(stderr, "SEGMODE := [ encap | inline ]\n");
107 fprintf(stderr, "ROUTE_GET_FLAGS := [ fibmatch ]\n");
108 exit(-1);
109 }
110
111
112 static struct
113 {
114 unsigned int tb;
115 int cloned;
116 int flushed;
117 char *flushb;
118 int flushp;
119 int flushe;
120 int protocol, protocolmask;
121 int scope, scopemask;
122 __u64 typemask;
123 int tos, tosmask;
124 int iif, iifmask;
125 int oif, oifmask;
126 int mark, markmask;
127 int realm, realmmask;
128 inet_prefix rprefsrc;
129 inet_prefix rvia;
130 inet_prefix rdst;
131 inet_prefix mdst;
132 inet_prefix rsrc;
133 inet_prefix msrc;
134 } filter;
135
136 static int flush_update(void)
137 {
138 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
139 perror("Failed to send flush request");
140 return -2;
141 }
142 filter.flushp = 0;
143 return 0;
144 }
145
146 static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
147 {
148 struct rtmsg *r = NLMSG_DATA(n);
149 inet_prefix dst = { .family = r->rtm_family };
150 inet_prefix src = { .family = r->rtm_family };
151 inet_prefix via = { .family = r->rtm_family };
152 inet_prefix prefsrc = { .family = r->rtm_family };
153 __u32 table;
154 static int ip6_multiple_tables;
155
156 table = rtm_get_table(r, tb);
157
158 if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
159 return 0;
160
161 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
162 ip6_multiple_tables = 1;
163
164 if (filter.cloned == !(r->rtm_flags&RTM_F_CLONED))
165 return 0;
166
167 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
168 if (filter.tb) {
169 if (filter.tb == RT_TABLE_LOCAL) {
170 if (r->rtm_type != RTN_LOCAL)
171 return 0;
172 } else if (filter.tb == RT_TABLE_MAIN) {
173 if (r->rtm_type == RTN_LOCAL)
174 return 0;
175 } else {
176 return 0;
177 }
178 }
179 } else {
180 if (filter.tb > 0 && filter.tb != table)
181 return 0;
182 }
183 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
184 return 0;
185 if ((filter.scope^r->rtm_scope)&filter.scopemask)
186 return 0;
187
188 if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
189 return 0;
190 if ((filter.tos^r->rtm_tos)&filter.tosmask)
191 return 0;
192 if (filter.rdst.family &&
193 (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len))
194 return 0;
195 if (filter.mdst.family &&
196 (r->rtm_family != filter.mdst.family ||
197 (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len)))
198 return 0;
199 if (filter.rsrc.family &&
200 (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len))
201 return 0;
202 if (filter.msrc.family &&
203 (r->rtm_family != filter.msrc.family ||
204 (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len)))
205 return 0;
206 if (filter.rvia.family) {
207 int family = r->rtm_family;
208
209 if (tb[RTA_VIA]) {
210 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
211
212 family = via->rtvia_family;
213 }
214 if (family != filter.rvia.family)
215 return 0;
216 }
217 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
218 return 0;
219
220 if (tb[RTA_DST])
221 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
222 if (filter.rsrc.family || filter.msrc.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 if (tb[RTA_GATEWAY])
228 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
229 if (tb[RTA_VIA]) {
230 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
231 struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
232
233 via.family = rtvia->rtvia_family;
234 memcpy(&via.data, rtvia->rtvia_addr, len);
235 }
236 }
237 if (filter.rprefsrc.bitlen > 0) {
238 if (tb[RTA_PREFSRC])
239 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
240 }
241
242 if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
243 return 0;
244 if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
245 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
246 return 0;
247
248 if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
249 return 0;
250 if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
251 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
252 return 0;
253
254 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
255 return 0;
256 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
257 return 0;
258 if (filter.realmmask) {
259 __u32 realms = 0;
260
261 if (tb[RTA_FLOW])
262 realms = rta_getattr_u32(tb[RTA_FLOW]);
263 if ((realms^filter.realm)&filter.realmmask)
264 return 0;
265 }
266 if (filter.iifmask) {
267 int iif = 0;
268
269 if (tb[RTA_IIF])
270 iif = rta_getattr_u32(tb[RTA_IIF]);
271 if ((iif^filter.iif)&filter.iifmask)
272 return 0;
273 }
274 if (filter.oifmask) {
275 int oif = 0;
276
277 if (tb[RTA_OIF])
278 oif = rta_getattr_u32(tb[RTA_OIF]);
279 if ((oif^filter.oif)&filter.oifmask)
280 return 0;
281 }
282 if (filter.markmask) {
283 int mark = 0;
284
285 if (tb[RTA_MARK])
286 mark = rta_getattr_u32(tb[RTA_MARK]);
287 if ((mark ^ filter.mark) & filter.markmask)
288 return 0;
289 }
290 if (filter.flushb &&
291 r->rtm_family == AF_INET6 &&
292 r->rtm_dst_len == 0 &&
293 r->rtm_type == RTN_UNREACHABLE &&
294 tb[RTA_PRIORITY] &&
295 rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
296 return 0;
297
298 return 1;
299 }
300
301 static void print_rtax_features(FILE *fp, unsigned int features)
302 {
303 unsigned int of = features;
304
305 if (features & RTAX_FEATURE_ECN) {
306 fprintf(fp, "ecn ");
307 features &= ~RTAX_FEATURE_ECN;
308 }
309
310 if (features)
311 fprintf(fp, "0x%x ", of);
312 }
313
314 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
315 {
316 FILE *fp = (FILE *)arg;
317 struct rtmsg *r = NLMSG_DATA(n);
318 int len = n->nlmsg_len;
319 struct rtattr *tb[RTA_MAX+1];
320 int host_len, family;
321 __u32 table;
322 int ret;
323
324 SPRINT_BUF(b1);
325 static int hz;
326
327 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
328 fprintf(stderr, "Not a route: %08x %08x %08x\n",
329 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
330 return -1;
331 }
332 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
333 return 0;
334 len -= NLMSG_LENGTH(sizeof(*r));
335 if (len < 0) {
336 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
337 return -1;
338 }
339
340 host_len = af_bit_len(r->rtm_family);
341
342 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
343 table = rtm_get_table(r, tb);
344
345 if (!filter_nlmsg(n, tb, host_len))
346 return 0;
347
348 if (filter.flushb) {
349 struct nlmsghdr *fn;
350
351 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
352 if ((ret = flush_update()) < 0)
353 return ret;
354 }
355 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
356 memcpy(fn, n, n->nlmsg_len);
357 fn->nlmsg_type = RTM_DELROUTE;
358 fn->nlmsg_flags = NLM_F_REQUEST;
359 fn->nlmsg_seq = ++rth.seq;
360 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
361 filter.flushed++;
362 if (show_stats < 2)
363 return 0;
364 }
365
366 if (n->nlmsg_type == RTM_DELROUTE)
367 fprintf(fp, "Deleted ");
368 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
369 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
370 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
371
372 if (tb[RTA_DST]) {
373 family = get_real_family(r->rtm_type, r->rtm_family);
374 if (r->rtm_dst_len != host_len) {
375 fprintf(fp, "%s/%u ",
376 rt_addr_n2a_rta(family, tb[RTA_DST]),
377 r->rtm_dst_len);
378 } else {
379 fprintf(fp, "%s ",
380 format_host_rta(family, tb[RTA_DST]));
381 }
382 } else if (r->rtm_dst_len) {
383 fprintf(fp, "0/%d ", r->rtm_dst_len);
384 } else {
385 fprintf(fp, "default ");
386 }
387 if (tb[RTA_SRC]) {
388 family = get_real_family(r->rtm_type, r->rtm_family);
389 if (r->rtm_src_len != host_len) {
390 fprintf(fp, "from %s/%u ",
391 rt_addr_n2a_rta(family, tb[RTA_SRC]),
392 r->rtm_src_len);
393 } else {
394 fprintf(fp, "from %s ",
395 format_host_rta(family, tb[RTA_SRC]));
396 }
397 } else if (r->rtm_src_len) {
398 fprintf(fp, "from 0/%u ", r->rtm_src_len);
399 }
400 if (tb[RTA_NEWDST]) {
401 fprintf(fp, "as to %s ",
402 format_host_rta(r->rtm_family, tb[RTA_NEWDST]));
403 }
404
405 if (tb[RTA_ENCAP])
406 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
407
408 if (r->rtm_tos && filter.tosmask != -1) {
409 SPRINT_BUF(b1);
410 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
411 }
412
413 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
414 fprintf(fp, "via %s ",
415 format_host_rta(r->rtm_family, tb[RTA_GATEWAY]));
416 }
417 if (tb[RTA_VIA]) {
418 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
419 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
420
421 fprintf(fp, "via %s %s ",
422 family_name(via->rtvia_family),
423 format_host(via->rtvia_family, len, via->rtvia_addr));
424 }
425 if (tb[RTA_OIF] && filter.oifmask != -1)
426 fprintf(fp, "dev %s ", ll_index_to_name(rta_getattr_u32(tb[RTA_OIF])));
427
428 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
429 fprintf(fp, "table %s ", rtnl_rttable_n2a(table, b1, sizeof(b1)));
430 if (!(r->rtm_flags&RTM_F_CLONED)) {
431 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) && filter.protocolmask != -1)
432 fprintf(fp, "proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1)));
433 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) && filter.scopemask != -1)
434 fprintf(fp, "scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1)));
435 }
436 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
437 /* Do not use format_host(). It is our local addr
438 and symbolic name will not be useful.
439 */
440 fprintf(fp, "src %s ",
441 rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]));
442 }
443 if (tb[RTA_PRIORITY])
444 fprintf(fp, "metric %u ", rta_getattr_u32(tb[RTA_PRIORITY]));
445 if (r->rtm_flags & RTNH_F_DEAD)
446 fprintf(fp, "dead ");
447 if (r->rtm_flags & RTNH_F_ONLINK)
448 fprintf(fp, "onlink ");
449 if (r->rtm_flags & RTNH_F_PERVASIVE)
450 fprintf(fp, "pervasive ");
451 if (r->rtm_flags & RTNH_F_OFFLOAD)
452 fprintf(fp, "offload ");
453 if (r->rtm_flags & RTM_F_NOTIFY)
454 fprintf(fp, "notify ");
455 if (r->rtm_flags & RTNH_F_LINKDOWN)
456 fprintf(fp, "linkdown ");
457 if (r->rtm_flags & RTNH_F_UNRESOLVED)
458 fprintf(fp, "unresolved ");
459 if (tb[RTA_MARK]) {
460 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
461
462 if (mark) {
463 if (mark >= 16)
464 fprintf(fp, "mark 0x%x ", mark);
465 else
466 fprintf(fp, "mark %u ", mark);
467 }
468 }
469
470 if (tb[RTA_FLOW] && filter.realmmask != ~0U) {
471 __u32 to = rta_getattr_u32(tb[RTA_FLOW]);
472 __u32 from = to>>16;
473
474 to &= 0xFFFF;
475 fprintf(fp, "realm%s ", from ? "s" : "");
476 if (from) {
477 fprintf(fp, "%s/",
478 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
479 }
480 fprintf(fp, "%s ",
481 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
482 }
483
484 if (tb[RTA_UID])
485 fprintf(fp, "uid %u ", rta_getattr_u32(tb[RTA_UID]));
486
487 if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) {
488 __u32 flags = r->rtm_flags&~0xFFFF;
489 int first = 1;
490
491 fprintf(fp, "%s cache ", _SL_);
492
493 #define PRTFL(fl, flname) if (flags&RTCF_##fl) { \
494 flags &= ~RTCF_##fl; \
495 fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
496 first = 0; }
497 PRTFL(LOCAL, "local");
498 PRTFL(REJECT, "reject");
499 PRTFL(MULTICAST, "mc");
500 PRTFL(BROADCAST, "brd");
501 PRTFL(DNAT, "dst-nat");
502 PRTFL(SNAT, "src-nat");
503 PRTFL(MASQ, "masq");
504 PRTFL(DIRECTDST, "dst-direct");
505 PRTFL(DIRECTSRC, "src-direct");
506 PRTFL(REDIRECTED, "redirected");
507 PRTFL(DOREDIRECT, "redirect");
508 PRTFL(FAST, "fastroute");
509 PRTFL(NOTIFY, "notify");
510 PRTFL(TPROXY, "proxy");
511
512 if (flags)
513 fprintf(fp, "%s%x> ", first ? "<" : "", flags);
514 if (tb[RTA_CACHEINFO]) {
515 struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]);
516
517 if (!hz)
518 hz = get_user_hz();
519 if (ci->rta_expires != 0)
520 fprintf(fp, "expires %dsec ", ci->rta_expires/hz);
521 if (ci->rta_error != 0)
522 fprintf(fp, "error %d ", ci->rta_error);
523 if (show_stats) {
524 if (ci->rta_clntref)
525 fprintf(fp, "users %d ", ci->rta_clntref);
526 if (ci->rta_used != 0)
527 fprintf(fp, "used %d ", ci->rta_used);
528 if (ci->rta_lastuse != 0)
529 fprintf(fp, "age %dsec ", ci->rta_lastuse/hz);
530 }
531 if (ci->rta_id)
532 fprintf(fp, "ipid 0x%04x ", ci->rta_id);
533 if (ci->rta_ts || ci->rta_tsage)
534 fprintf(fp, "ts 0x%x tsage %dsec ",
535 ci->rta_ts, ci->rta_tsage);
536 }
537 } else if (r->rtm_family == AF_INET6) {
538 struct rta_cacheinfo *ci = NULL;
539
540 if (tb[RTA_CACHEINFO])
541 ci = RTA_DATA(tb[RTA_CACHEINFO]);
542 if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
543 if (!hz)
544 hz = get_user_hz();
545 if (r->rtm_flags & RTM_F_CLONED)
546 fprintf(fp, "%s cache ", _SL_);
547 if (ci->rta_expires)
548 fprintf(fp, "expires %dsec ", ci->rta_expires/hz);
549 if (ci->rta_error != 0)
550 fprintf(fp, "error %d ", ci->rta_error);
551 if (show_stats) {
552 if (ci->rta_clntref)
553 fprintf(fp, "users %d ", ci->rta_clntref);
554 if (ci->rta_used != 0)
555 fprintf(fp, "used %d ", ci->rta_used);
556 if (ci->rta_lastuse != 0)
557 fprintf(fp, "age %dsec ", ci->rta_lastuse/hz);
558 }
559 } else if (ci) {
560 if (ci->rta_error != 0)
561 fprintf(fp, "error %d ", ci->rta_error);
562 }
563 }
564 if (tb[RTA_METRICS]) {
565 int i;
566 unsigned int mxlock = 0;
567 struct rtattr *mxrta[RTAX_MAX+1];
568
569 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]),
570 RTA_PAYLOAD(tb[RTA_METRICS]));
571 if (mxrta[RTAX_LOCK])
572 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
573
574 for (i = 2; i <= RTAX_MAX; i++) {
575 __u32 val = 0U;
576
577 if (mxrta[i] == NULL)
578 continue;
579
580 if (i != RTAX_CC_ALGO)
581 val = rta_getattr_u32(mxrta[i]);
582
583 if (i == RTAX_HOPLIMIT && (int)val == -1)
584 continue;
585
586 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
587 fprintf(fp, "%s ", mx_names[i]);
588 else
589 fprintf(fp, "metric %d ", i);
590
591 if (mxlock & (1<<i))
592 fprintf(fp, "lock ");
593
594 switch (i) {
595 case RTAX_FEATURES:
596 print_rtax_features(fp, val);
597 break;
598 default:
599 fprintf(fp, "%u ", val);
600 break;
601
602 case RTAX_RTT:
603 case RTAX_RTTVAR:
604 case RTAX_RTO_MIN:
605 if (i == RTAX_RTT)
606 val /= 8;
607 else if (i == RTAX_RTTVAR)
608 val /= 4;
609
610 if (val >= 1000)
611 fprintf(fp, "%gs ", val/1e3);
612 else
613 fprintf(fp, "%ums ", val);
614 break;
615 case RTAX_CC_ALGO:
616 fprintf(fp, "%s ", rta_getattr_str(mxrta[i]));
617 break;
618 }
619 }
620 }
621 if (tb[RTA_IIF] && filter.iifmask != -1) {
622 fprintf(fp, "iif %s ",
623 ll_index_to_name(rta_getattr_u32(tb[RTA_IIF])));
624 }
625 if (tb[RTA_MULTIPATH]) {
626 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
627 int first = 1;
628
629 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
630
631 for (;;) {
632 if (len < sizeof(*nh))
633 break;
634 if (nh->rtnh_len > len)
635 break;
636 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
637 if (first) {
638 fprintf(fp, "Oifs: ");
639 first = 0;
640 } else {
641 fprintf(fp, " ");
642 }
643 } else
644 fprintf(fp, "%s\tnexthop ", _SL_);
645 if (nh->rtnh_len > sizeof(*nh)) {
646 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh));
647
648 if (tb[RTA_ENCAP])
649 lwt_print_encap(fp,
650 tb[RTA_ENCAP_TYPE],
651 tb[RTA_ENCAP]);
652 if (tb[RTA_NEWDST]) {
653 fprintf(fp, "as to %s ",
654 format_host_rta(r->rtm_family,
655 tb[RTA_NEWDST]));
656 }
657 if (tb[RTA_GATEWAY]) {
658 fprintf(fp, "via %s ",
659 format_host_rta(r->rtm_family,
660 tb[RTA_GATEWAY]));
661 }
662 if (tb[RTA_VIA]) {
663 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
664 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
665
666 fprintf(fp, "via %s %s ",
667 family_name(via->rtvia_family),
668 format_host(via->rtvia_family, len, via->rtvia_addr));
669 }
670 if (tb[RTA_FLOW]) {
671 __u32 to = rta_getattr_u32(tb[RTA_FLOW]);
672 __u32 from = to>>16;
673
674 to &= 0xFFFF;
675 fprintf(fp, "realm%s ", from ? "s" : "");
676 if (from) {
677 fprintf(fp, "%s/",
678 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
679 }
680 fprintf(fp, "%s ",
681 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
682 }
683 }
684 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
685 fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
686 if (nh->rtnh_hops != 1)
687 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
688 fprintf(fp, " ");
689 } else {
690 fprintf(fp, "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
691 if (r->rtm_family != AF_MPLS)
692 fprintf(fp, "weight %d ",
693 nh->rtnh_hops+1);
694 }
695 if (nh->rtnh_flags & RTNH_F_DEAD)
696 fprintf(fp, "dead ");
697 if (nh->rtnh_flags & RTNH_F_ONLINK)
698 fprintf(fp, "onlink ");
699 if (nh->rtnh_flags & RTNH_F_PERVASIVE)
700 fprintf(fp, "pervasive ");
701 if (nh->rtnh_flags & RTNH_F_LINKDOWN)
702 fprintf(fp, "linkdown ");
703 len -= NLMSG_ALIGN(nh->rtnh_len);
704 nh = RTNH_NEXT(nh);
705 }
706 }
707 if (tb[RTA_PREF]) {
708 unsigned int pref = rta_getattr_u8(tb[RTA_PREF]);
709
710 fprintf(fp, "pref ");
711
712 switch (pref) {
713 case ICMPV6_ROUTER_PREF_LOW:
714 fprintf(fp, "low");
715 break;
716 case ICMPV6_ROUTER_PREF_MEDIUM:
717 fprintf(fp, "medium");
718 break;
719 case ICMPV6_ROUTER_PREF_HIGH:
720 fprintf(fp, "high");
721 break;
722 default:
723 fprintf(fp, "%u", pref);
724 }
725 }
726 if (tb[RTA_TTL_PROPAGATE]) {
727 fprintf(fp, "ttl-propagate ");
728 if (rta_getattr_u8(tb[RTA_TTL_PROPAGATE]))
729 fprintf(fp, "enabled");
730 else
731 fprintf(fp, "disabled");
732 }
733 fprintf(fp, "\n");
734 fflush(fp);
735 return 0;
736 }
737
738 static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
739 struct rtattr *rta, struct rtnexthop *rtnh,
740 int *argcp, char ***argvp)
741 {
742 int argc = *argcp;
743 char **argv = *argvp;
744
745 while (++argv, --argc > 0) {
746 if (strcmp(*argv, "via") == 0) {
747 inet_prefix addr;
748 int family;
749
750 NEXT_ARG();
751 family = read_family(*argv);
752 if (family == AF_UNSPEC)
753 family = r->rtm_family;
754 else
755 NEXT_ARG();
756 get_addr(&addr, *argv, family);
757 if (r->rtm_family == AF_UNSPEC)
758 r->rtm_family = addr.family;
759 if (addr.family == r->rtm_family) {
760 rta_addattr_l(rta, 4096, RTA_GATEWAY, &addr.data, addr.bytelen);
761 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
762 } else {
763 rta_addattr_l(rta, 4096, RTA_VIA, &addr.family, addr.bytelen+2);
764 rtnh->rtnh_len += RTA_SPACE(addr.bytelen+2);
765 }
766 } else if (strcmp(*argv, "dev") == 0) {
767 NEXT_ARG();
768 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
769 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
770 return -1;
771 }
772 } else if (strcmp(*argv, "weight") == 0) {
773 unsigned int w;
774
775 NEXT_ARG();
776 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
777 invarg("\"weight\" is invalid\n", *argv);
778 rtnh->rtnh_hops = w - 1;
779 } else if (strcmp(*argv, "onlink") == 0) {
780 rtnh->rtnh_flags |= RTNH_F_ONLINK;
781 } else if (matches(*argv, "realms") == 0) {
782 __u32 realm;
783
784 NEXT_ARG();
785 if (get_rt_realms_or_raw(&realm, *argv))
786 invarg("\"realm\" value is invalid\n", *argv);
787 rta_addattr32(rta, 4096, RTA_FLOW, realm);
788 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
789 } else if (strcmp(*argv, "encap") == 0) {
790 int len = rta->rta_len;
791
792 lwt_parse_encap(rta, 4096, &argc, &argv);
793 rtnh->rtnh_len += rta->rta_len - len;
794 } else if (strcmp(*argv, "as") == 0) {
795 inet_prefix addr;
796
797 NEXT_ARG();
798 if (strcmp(*argv, "to") == 0)
799 NEXT_ARG();
800 get_addr(&addr, *argv, r->rtm_family);
801 rta_addattr_l(rta, 4096, RTA_NEWDST, &addr.data,
802 addr.bytelen);
803 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
804 } else
805 break;
806 }
807 *argcp = argc;
808 *argvp = argv;
809 return 0;
810 }
811
812 static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
813 int argc, char **argv)
814 {
815 char buf[1024];
816 struct rtattr *rta = (void *)buf;
817 struct rtnexthop *rtnh;
818
819 rta->rta_type = RTA_MULTIPATH;
820 rta->rta_len = RTA_LENGTH(0);
821 rtnh = RTA_DATA(rta);
822
823 while (argc > 0) {
824 if (strcmp(*argv, "nexthop") != 0) {
825 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
826 exit(-1);
827 }
828 if (argc <= 1) {
829 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
830 exit(-1);
831 }
832 memset(rtnh, 0, sizeof(*rtnh));
833 rtnh->rtnh_len = sizeof(*rtnh);
834 rta->rta_len += rtnh->rtnh_len;
835 parse_one_nh(n, r, rta, rtnh, &argc, &argv);
836 rtnh = RTNH_NEXT(rtnh);
837 }
838
839 if (rta->rta_len > RTA_LENGTH(0))
840 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
841 return 0;
842 }
843
844 static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
845 {
846 struct {
847 struct nlmsghdr n;
848 struct rtmsg r;
849 char buf[1024];
850 } req = {
851 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
852 .n.nlmsg_flags = NLM_F_REQUEST | flags,
853 .n.nlmsg_type = cmd,
854 .r.rtm_family = preferred_family,
855 .r.rtm_table = RT_TABLE_MAIN,
856 .r.rtm_scope = RT_SCOPE_NOWHERE,
857 };
858 char mxbuf[256];
859 struct rtattr *mxrta = (void *)mxbuf;
860 unsigned int mxlock = 0;
861 char *d = NULL;
862 int gw_ok = 0;
863 int dst_ok = 0;
864 int nhs_ok = 0;
865 int scope_ok = 0;
866 int table_ok = 0;
867 int raw = 0;
868 int type_ok = 0;
869
870 if (cmd != RTM_DELROUTE) {
871 req.r.rtm_protocol = RTPROT_BOOT;
872 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
873 req.r.rtm_type = RTN_UNICAST;
874 }
875
876 mxrta->rta_type = RTA_METRICS;
877 mxrta->rta_len = RTA_LENGTH(0);
878
879 while (argc > 0) {
880 if (strcmp(*argv, "src") == 0) {
881 inet_prefix addr;
882
883 NEXT_ARG();
884 get_addr(&addr, *argv, req.r.rtm_family);
885 if (req.r.rtm_family == AF_UNSPEC)
886 req.r.rtm_family = addr.family;
887 addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
888 } else if (strcmp(*argv, "as") == 0) {
889 inet_prefix addr;
890
891 NEXT_ARG();
892 if (strcmp(*argv, "to") == 0) {
893 NEXT_ARG();
894 }
895 get_addr(&addr, *argv, req.r.rtm_family);
896 if (req.r.rtm_family == AF_UNSPEC)
897 req.r.rtm_family = addr.family;
898 addattr_l(&req.n, sizeof(req), RTA_NEWDST, &addr.data, addr.bytelen);
899 } else if (strcmp(*argv, "via") == 0) {
900 inet_prefix addr;
901 int family;
902
903 if (gw_ok) {
904 invarg("use nexthop syntax to specify multiple via\n",
905 *argv);
906 }
907 gw_ok = 1;
908 NEXT_ARG();
909 family = read_family(*argv);
910 if (family == AF_UNSPEC)
911 family = req.r.rtm_family;
912 else
913 NEXT_ARG();
914 get_addr(&addr, *argv, family);
915 if (req.r.rtm_family == AF_UNSPEC)
916 req.r.rtm_family = addr.family;
917 if (addr.family == req.r.rtm_family)
918 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
919 &addr.data, addr.bytelen);
920 else
921 addattr_l(&req.n, sizeof(req), RTA_VIA,
922 &addr.family, addr.bytelen+2);
923 } else if (strcmp(*argv, "from") == 0) {
924 inet_prefix addr;
925
926 NEXT_ARG();
927 get_prefix(&addr, *argv, req.r.rtm_family);
928 if (req.r.rtm_family == AF_UNSPEC)
929 req.r.rtm_family = addr.family;
930 if (addr.bytelen)
931 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
932 req.r.rtm_src_len = addr.bitlen;
933 } else if (strcmp(*argv, "tos") == 0 ||
934 matches(*argv, "dsfield") == 0) {
935 __u32 tos;
936
937 NEXT_ARG();
938 if (rtnl_dsfield_a2n(&tos, *argv))
939 invarg("\"tos\" value is invalid\n", *argv);
940 req.r.rtm_tos = tos;
941 } else if (strcmp(*argv, "expires") == 0) {
942 __u32 expires;
943
944 NEXT_ARG();
945 if (get_u32(&expires, *argv, 0))
946 invarg("\"expires\" value is invalid\n", *argv);
947 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
948 } else if (matches(*argv, "metric") == 0 ||
949 matches(*argv, "priority") == 0 ||
950 strcmp(*argv, "preference") == 0) {
951 __u32 metric;
952
953 NEXT_ARG();
954 if (get_u32(&metric, *argv, 0))
955 invarg("\"metric\" value is invalid\n", *argv);
956 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
957 } else if (strcmp(*argv, "scope") == 0) {
958 __u32 scope = 0;
959
960 NEXT_ARG();
961 if (rtnl_rtscope_a2n(&scope, *argv))
962 invarg("invalid \"scope\" value\n", *argv);
963 req.r.rtm_scope = scope;
964 scope_ok = 1;
965 } else if (strcmp(*argv, "mtu") == 0) {
966 unsigned int mtu;
967
968 NEXT_ARG();
969 if (strcmp(*argv, "lock") == 0) {
970 mxlock |= (1<<RTAX_MTU);
971 NEXT_ARG();
972 }
973 if (get_unsigned(&mtu, *argv, 0))
974 invarg("\"mtu\" value is invalid\n", *argv);
975 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
976 } else if (strcmp(*argv, "hoplimit") == 0) {
977 unsigned int hoplimit;
978
979 NEXT_ARG();
980 if (strcmp(*argv, "lock") == 0) {
981 mxlock |= (1<<RTAX_HOPLIMIT);
982 NEXT_ARG();
983 }
984 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
985 invarg("\"hoplimit\" value is invalid\n", *argv);
986 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
987 } else if (strcmp(*argv, "advmss") == 0) {
988 unsigned int mss;
989
990 NEXT_ARG();
991 if (strcmp(*argv, "lock") == 0) {
992 mxlock |= (1<<RTAX_ADVMSS);
993 NEXT_ARG();
994 }
995 if (get_unsigned(&mss, *argv, 0))
996 invarg("\"mss\" value is invalid\n", *argv);
997 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
998 } else if (matches(*argv, "reordering") == 0) {
999 unsigned int reord;
1000
1001 NEXT_ARG();
1002 if (strcmp(*argv, "lock") == 0) {
1003 mxlock |= (1<<RTAX_REORDERING);
1004 NEXT_ARG();
1005 }
1006 if (get_unsigned(&reord, *argv, 0))
1007 invarg("\"reordering\" value is invalid\n", *argv);
1008 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1009 } else if (strcmp(*argv, "rtt") == 0) {
1010 unsigned int rtt;
1011
1012 NEXT_ARG();
1013 if (strcmp(*argv, "lock") == 0) {
1014 mxlock |= (1<<RTAX_RTT);
1015 NEXT_ARG();
1016 }
1017 if (get_time_rtt(&rtt, *argv, &raw))
1018 invarg("\"rtt\" value is invalid\n", *argv);
1019 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1020 (raw) ? rtt : rtt * 8);
1021 } else if (strcmp(*argv, "rto_min") == 0) {
1022 unsigned int rto_min;
1023
1024 NEXT_ARG();
1025 mxlock |= (1<<RTAX_RTO_MIN);
1026 if (get_time_rtt(&rto_min, *argv, &raw))
1027 invarg("\"rto_min\" value is invalid\n",
1028 *argv);
1029 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1030 rto_min);
1031 } else if (matches(*argv, "window") == 0) {
1032 unsigned int win;
1033
1034 NEXT_ARG();
1035 if (strcmp(*argv, "lock") == 0) {
1036 mxlock |= (1<<RTAX_WINDOW);
1037 NEXT_ARG();
1038 }
1039 if (get_unsigned(&win, *argv, 0))
1040 invarg("\"window\" value is invalid\n", *argv);
1041 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1042 } else if (matches(*argv, "cwnd") == 0) {
1043 unsigned int win;
1044
1045 NEXT_ARG();
1046 if (strcmp(*argv, "lock") == 0) {
1047 mxlock |= (1<<RTAX_CWND);
1048 NEXT_ARG();
1049 }
1050 if (get_unsigned(&win, *argv, 0))
1051 invarg("\"cwnd\" value is invalid\n", *argv);
1052 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1053 } else if (matches(*argv, "initcwnd") == 0) {
1054 unsigned int win;
1055
1056 NEXT_ARG();
1057 if (strcmp(*argv, "lock") == 0) {
1058 mxlock |= (1<<RTAX_INITCWND);
1059 NEXT_ARG();
1060 }
1061 if (get_unsigned(&win, *argv, 0))
1062 invarg("\"initcwnd\" value is invalid\n", *argv);
1063 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITCWND, win);
1064 } else if (matches(*argv, "initrwnd") == 0) {
1065 unsigned int win;
1066
1067 NEXT_ARG();
1068 if (strcmp(*argv, "lock") == 0) {
1069 mxlock |= (1<<RTAX_INITRWND);
1070 NEXT_ARG();
1071 }
1072 if (get_unsigned(&win, *argv, 0))
1073 invarg("\"initrwnd\" value is invalid\n", *argv);
1074 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITRWND, win);
1075 } else if (matches(*argv, "features") == 0) {
1076 unsigned int features = 0;
1077
1078 while (argc > 0) {
1079 NEXT_ARG();
1080
1081 if (strcmp(*argv, "ecn") == 0)
1082 features |= RTAX_FEATURE_ECN;
1083 else
1084 invarg("\"features\" value not valid\n", *argv);
1085 break;
1086 }
1087
1088 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FEATURES, features);
1089 } else if (matches(*argv, "quickack") == 0) {
1090 unsigned int quickack;
1091
1092 NEXT_ARG();
1093 if (get_unsigned(&quickack, *argv, 0))
1094 invarg("\"quickack\" value is invalid\n", *argv);
1095 if (quickack != 1 && quickack != 0)
1096 invarg("\"quickack\" value should be 0 or 1\n", *argv);
1097 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_QUICKACK, quickack);
1098 } else if (matches(*argv, "congctl") == 0) {
1099 NEXT_ARG();
1100 if (strcmp(*argv, "lock") == 0) {
1101 mxlock |= 1 << RTAX_CC_ALGO;
1102 NEXT_ARG();
1103 }
1104 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1105 strlen(*argv));
1106 } else if (matches(*argv, "rttvar") == 0) {
1107 unsigned int win;
1108
1109 NEXT_ARG();
1110 if (strcmp(*argv, "lock") == 0) {
1111 mxlock |= (1<<RTAX_RTTVAR);
1112 NEXT_ARG();
1113 }
1114 if (get_time_rtt(&win, *argv, &raw))
1115 invarg("\"rttvar\" value is invalid\n", *argv);
1116 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1117 (raw) ? win : win * 4);
1118 } else if (matches(*argv, "ssthresh") == 0) {
1119 unsigned int win;
1120
1121 NEXT_ARG();
1122 if (strcmp(*argv, "lock") == 0) {
1123 mxlock |= (1<<RTAX_SSTHRESH);
1124 NEXT_ARG();
1125 }
1126 if (get_unsigned(&win, *argv, 0))
1127 invarg("\"ssthresh\" value is invalid\n", *argv);
1128 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1129 } else if (matches(*argv, "realms") == 0) {
1130 __u32 realm;
1131
1132 NEXT_ARG();
1133 if (get_rt_realms_or_raw(&realm, *argv))
1134 invarg("\"realm\" value is invalid\n", *argv);
1135 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1136 } else if (strcmp(*argv, "onlink") == 0) {
1137 req.r.rtm_flags |= RTNH_F_ONLINK;
1138 } else if (strcmp(*argv, "nexthop") == 0) {
1139 nhs_ok = 1;
1140 break;
1141 } else if (matches(*argv, "protocol") == 0) {
1142 __u32 prot;
1143
1144 NEXT_ARG();
1145 if (rtnl_rtprot_a2n(&prot, *argv))
1146 invarg("\"protocol\" value is invalid\n", *argv);
1147 req.r.rtm_protocol = prot;
1148 } else if (matches(*argv, "table") == 0) {
1149 __u32 tid;
1150
1151 NEXT_ARG();
1152 if (rtnl_rttable_a2n(&tid, *argv))
1153 invarg("\"table\" value is invalid\n", *argv);
1154 if (tid < 256)
1155 req.r.rtm_table = tid;
1156 else {
1157 req.r.rtm_table = RT_TABLE_UNSPEC;
1158 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1159 }
1160 table_ok = 1;
1161 } else if (matches(*argv, "vrf") == 0) {
1162 __u32 tid;
1163
1164 NEXT_ARG();
1165 tid = ipvrf_get_table(*argv);
1166 if (tid == 0)
1167 invarg("Invalid VRF\n", *argv);
1168 if (tid < 256)
1169 req.r.rtm_table = tid;
1170 else {
1171 req.r.rtm_table = RT_TABLE_UNSPEC;
1172 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1173 }
1174 table_ok = 1;
1175 } else if (strcmp(*argv, "dev") == 0 ||
1176 strcmp(*argv, "oif") == 0) {
1177 NEXT_ARG();
1178 d = *argv;
1179 } else if (matches(*argv, "pref") == 0) {
1180 __u8 pref;
1181
1182 NEXT_ARG();
1183 if (strcmp(*argv, "low") == 0)
1184 pref = ICMPV6_ROUTER_PREF_LOW;
1185 else if (strcmp(*argv, "medium") == 0)
1186 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1187 else if (strcmp(*argv, "high") == 0)
1188 pref = ICMPV6_ROUTER_PREF_HIGH;
1189 else if (get_u8(&pref, *argv, 0))
1190 invarg("\"pref\" value is invalid\n", *argv);
1191 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1192 } else if (strcmp(*argv, "encap") == 0) {
1193 char buf[1024];
1194 struct rtattr *rta = (void *)buf;
1195
1196 rta->rta_type = RTA_ENCAP;
1197 rta->rta_len = RTA_LENGTH(0);
1198
1199 lwt_parse_encap(rta, sizeof(buf), &argc, &argv);
1200
1201 if (rta->rta_len > RTA_LENGTH(0))
1202 addraw_l(&req.n, 1024, RTA_DATA(rta), RTA_PAYLOAD(rta));
1203 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1204 __u8 ttl_prop;
1205
1206 NEXT_ARG();
1207 if (matches(*argv, "enabled") == 0)
1208 ttl_prop = 1;
1209 else if (matches(*argv, "disabled") == 0)
1210 ttl_prop = 0;
1211 else
1212 invarg("\"ttl-propagate\" value is invalid\n",
1213 *argv);
1214
1215 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1216 ttl_prop);
1217 } else {
1218 int type;
1219 inet_prefix dst;
1220
1221 if (strcmp(*argv, "to") == 0) {
1222 NEXT_ARG();
1223 }
1224 if ((**argv < '0' || **argv > '9') &&
1225 rtnl_rtntype_a2n(&type, *argv) == 0) {
1226 NEXT_ARG();
1227 req.r.rtm_type = type;
1228 type_ok = 1;
1229 }
1230
1231 if (matches(*argv, "help") == 0)
1232 usage();
1233 if (dst_ok)
1234 duparg2("to", *argv);
1235 get_prefix(&dst, *argv, req.r.rtm_family);
1236 if (req.r.rtm_family == AF_UNSPEC)
1237 req.r.rtm_family = dst.family;
1238 req.r.rtm_dst_len = dst.bitlen;
1239 dst_ok = 1;
1240 if (dst.bytelen)
1241 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
1242 }
1243 argc--; argv++;
1244 }
1245
1246 if (!dst_ok)
1247 usage();
1248
1249 if (d) {
1250 int idx;
1251
1252 if ((idx = ll_name_to_index(d)) == 0) {
1253 fprintf(stderr, "Cannot find device \"%s\"\n", d);
1254 return -1;
1255 }
1256 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1257 }
1258
1259 if (mxrta->rta_len > RTA_LENGTH(0)) {
1260 if (mxlock)
1261 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1262 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1263 }
1264
1265 if (nhs_ok)
1266 parse_nexthops(&req.n, &req.r, argc, argv);
1267
1268 if (req.r.rtm_family == AF_UNSPEC)
1269 req.r.rtm_family = AF_INET;
1270
1271 if (!table_ok) {
1272 if (req.r.rtm_type == RTN_LOCAL ||
1273 req.r.rtm_type == RTN_BROADCAST ||
1274 req.r.rtm_type == RTN_NAT ||
1275 req.r.rtm_type == RTN_ANYCAST)
1276 req.r.rtm_table = RT_TABLE_LOCAL;
1277 }
1278 if (!scope_ok) {
1279 if (req.r.rtm_family == AF_INET6 ||
1280 req.r.rtm_family == AF_MPLS)
1281 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1282 else if (req.r.rtm_type == RTN_LOCAL ||
1283 req.r.rtm_type == RTN_NAT)
1284 req.r.rtm_scope = RT_SCOPE_HOST;
1285 else if (req.r.rtm_type == RTN_BROADCAST ||
1286 req.r.rtm_type == RTN_MULTICAST ||
1287 req.r.rtm_type == RTN_ANYCAST)
1288 req.r.rtm_scope = RT_SCOPE_LINK;
1289 else if (req.r.rtm_type == RTN_UNICAST ||
1290 req.r.rtm_type == RTN_UNSPEC) {
1291 if (cmd == RTM_DELROUTE)
1292 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1293 else if (!gw_ok && !nhs_ok)
1294 req.r.rtm_scope = RT_SCOPE_LINK;
1295 }
1296 }
1297
1298 if (!type_ok && req.r.rtm_family == AF_MPLS)
1299 req.r.rtm_type = RTN_UNICAST;
1300
1301 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
1302 return -2;
1303
1304 return 0;
1305 }
1306
1307 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
1308 {
1309 struct {
1310 struct nlmsghdr nlh;
1311 struct rtmsg rtm;
1312 } req = {
1313 .nlh.nlmsg_len = sizeof(req),
1314 .nlh.nlmsg_type = RTM_GETROUTE,
1315 .nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST,
1316 .nlh.nlmsg_seq = rth->dump = ++rth->seq,
1317 .rtm.rtm_family = family,
1318 .rtm.rtm_flags = RTM_F_CLONED,
1319 };
1320 struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
1321
1322 return sendto(rth->fd, (void *)&req, sizeof(req), 0, (struct sockaddr *)&nladdr, sizeof(nladdr));
1323 }
1324
1325 static int iproute_flush_cache(void)
1326 {
1327 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1328
1329 int len;
1330 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1331 char *buffer = "-1";
1332
1333 if (flush_fd < 0) {
1334 fprintf(stderr, "Cannot open \"%s\": %s\n",
1335 ROUTE_FLUSH_PATH, strerror(errno));
1336 return -1;
1337 }
1338
1339 len = strlen(buffer);
1340
1341 if ((write(flush_fd, (void *)buffer, len)) < len) {
1342 fprintf(stderr, "Cannot flush routing cache\n");
1343 close(flush_fd);
1344 return -1;
1345 }
1346 close(flush_fd);
1347 return 0;
1348 }
1349
1350 static __u32 route_dump_magic = 0x45311224;
1351
1352 static int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n,
1353 void *arg)
1354 {
1355 int ret;
1356 int len = n->nlmsg_len;
1357 struct rtmsg *r = NLMSG_DATA(n);
1358 struct rtattr *tb[RTA_MAX+1];
1359 int host_len;
1360
1361 host_len = af_bit_len(r->rtm_family);
1362 len -= NLMSG_LENGTH(sizeof(*r));
1363 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1364
1365 if (!filter_nlmsg(n, tb, host_len))
1366 return 0;
1367
1368 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1369 if ((ret > 0) && (ret != n->nlmsg_len)) {
1370 fprintf(stderr, "Short write while saving nlmsg\n");
1371 ret = -EIO;
1372 }
1373
1374 return ret == n->nlmsg_len ? 0 : ret;
1375 }
1376
1377 static int save_route_prep(void)
1378 {
1379 int ret;
1380
1381 if (isatty(STDOUT_FILENO)) {
1382 fprintf(stderr, "Not sending a binary stream to stdout\n");
1383 return -1;
1384 }
1385
1386 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1387 if (ret != sizeof(route_dump_magic)) {
1388 fprintf(stderr, "Can't write magic to dump file\n");
1389 return -1;
1390 }
1391
1392 return 0;
1393 }
1394
1395 static int iproute_list_flush_or_save(int argc, char **argv, int action)
1396 {
1397 int do_ipv6 = preferred_family;
1398 char *id = NULL;
1399 char *od = NULL;
1400 unsigned int mark = 0;
1401 rtnl_filter_t filter_fn;
1402 int ret;
1403
1404 if (action == IPROUTE_SAVE) {
1405 if (save_route_prep())
1406 return -1;
1407
1408 filter_fn = save_route;
1409 } else
1410 filter_fn = print_route;
1411
1412 iproute_reset_filter(0);
1413 filter.tb = RT_TABLE_MAIN;
1414
1415 if ((action == IPROUTE_FLUSH) && argc <= 0) {
1416 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1417 return -1;
1418 }
1419
1420 while (argc > 0) {
1421 if (matches(*argv, "table") == 0) {
1422 __u32 tid;
1423
1424 NEXT_ARG();
1425 if (rtnl_rttable_a2n(&tid, *argv)) {
1426 if (strcmp(*argv, "all") == 0) {
1427 filter.tb = 0;
1428 } else if (strcmp(*argv, "cache") == 0) {
1429 filter.cloned = 1;
1430 } else if (strcmp(*argv, "help") == 0) {
1431 usage();
1432 } else {
1433 invarg("table id value is invalid\n", *argv);
1434 }
1435 } else
1436 filter.tb = tid;
1437 } else if (matches(*argv, "vrf") == 0) {
1438 __u32 tid;
1439
1440 NEXT_ARG();
1441 tid = ipvrf_get_table(*argv);
1442 if (tid == 0)
1443 invarg("Invalid VRF\n", *argv);
1444 filter.tb = tid;
1445 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1446 } else if (matches(*argv, "cached") == 0 ||
1447 matches(*argv, "cloned") == 0) {
1448 filter.cloned = 1;
1449 } else if (strcmp(*argv, "tos") == 0 ||
1450 matches(*argv, "dsfield") == 0) {
1451 __u32 tos;
1452
1453 NEXT_ARG();
1454 if (rtnl_dsfield_a2n(&tos, *argv))
1455 invarg("TOS value is invalid\n", *argv);
1456 filter.tos = tos;
1457 filter.tosmask = -1;
1458 } else if (matches(*argv, "protocol") == 0) {
1459 __u32 prot = 0;
1460
1461 NEXT_ARG();
1462 filter.protocolmask = -1;
1463 if (rtnl_rtprot_a2n(&prot, *argv)) {
1464 if (strcmp(*argv, "all") != 0)
1465 invarg("invalid \"protocol\"\n", *argv);
1466 prot = 0;
1467 filter.protocolmask = 0;
1468 }
1469 filter.protocol = prot;
1470 } else if (matches(*argv, "scope") == 0) {
1471 __u32 scope = 0;
1472
1473 NEXT_ARG();
1474 filter.scopemask = -1;
1475 if (rtnl_rtscope_a2n(&scope, *argv)) {
1476 if (strcmp(*argv, "all") != 0)
1477 invarg("invalid \"scope\"\n", *argv);
1478 scope = RT_SCOPE_NOWHERE;
1479 filter.scopemask = 0;
1480 }
1481 filter.scope = scope;
1482 } else if (matches(*argv, "type") == 0) {
1483 int type;
1484
1485 NEXT_ARG();
1486 if (rtnl_rtntype_a2n(&type, *argv))
1487 invarg("node type value is invalid\n", *argv);
1488 filter.typemask = (1<<type);
1489 } else if (strcmp(*argv, "dev") == 0 ||
1490 strcmp(*argv, "oif") == 0) {
1491 NEXT_ARG();
1492 od = *argv;
1493 } else if (strcmp(*argv, "iif") == 0) {
1494 NEXT_ARG();
1495 id = *argv;
1496 } else if (strcmp(*argv, "mark") == 0) {
1497 NEXT_ARG();
1498 if (get_unsigned(&mark, *argv, 0))
1499 invarg("invalid mark value", *argv);
1500 filter.markmask = -1;
1501 } else if (strcmp(*argv, "via") == 0) {
1502 int family;
1503
1504 NEXT_ARG();
1505 family = read_family(*argv);
1506 if (family == AF_UNSPEC)
1507 family = do_ipv6;
1508 else
1509 NEXT_ARG();
1510 get_prefix(&filter.rvia, *argv, family);
1511 } else if (strcmp(*argv, "src") == 0) {
1512 NEXT_ARG();
1513 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1514 } else if (matches(*argv, "realms") == 0) {
1515 __u32 realm;
1516
1517 NEXT_ARG();
1518 if (get_rt_realms_or_raw(&realm, *argv))
1519 invarg("invalid realms\n", *argv);
1520 filter.realm = realm;
1521 filter.realmmask = ~0U;
1522 if ((filter.realm&0xFFFF) == 0 &&
1523 (*argv)[strlen(*argv) - 1] == '/')
1524 filter.realmmask &= ~0xFFFF;
1525 if ((filter.realm&0xFFFF0000U) == 0 &&
1526 (strchr(*argv, '/') == NULL ||
1527 (*argv)[0] == '/'))
1528 filter.realmmask &= ~0xFFFF0000U;
1529 } else if (matches(*argv, "from") == 0) {
1530 NEXT_ARG();
1531 if (matches(*argv, "root") == 0) {
1532 NEXT_ARG();
1533 get_prefix(&filter.rsrc, *argv, do_ipv6);
1534 } else if (matches(*argv, "match") == 0) {
1535 NEXT_ARG();
1536 get_prefix(&filter.msrc, *argv, do_ipv6);
1537 } else {
1538 if (matches(*argv, "exact") == 0) {
1539 NEXT_ARG();
1540 }
1541 get_prefix(&filter.msrc, *argv, do_ipv6);
1542 filter.rsrc = filter.msrc;
1543 }
1544 } else {
1545 if (matches(*argv, "to") == 0) {
1546 NEXT_ARG();
1547 }
1548 if (matches(*argv, "root") == 0) {
1549 NEXT_ARG();
1550 get_prefix(&filter.rdst, *argv, do_ipv6);
1551 } else if (matches(*argv, "match") == 0) {
1552 NEXT_ARG();
1553 get_prefix(&filter.mdst, *argv, do_ipv6);
1554 } else {
1555 if (matches(*argv, "exact") == 0) {
1556 NEXT_ARG();
1557 }
1558 get_prefix(&filter.mdst, *argv, do_ipv6);
1559 filter.rdst = filter.mdst;
1560 }
1561 }
1562 argc--; argv++;
1563 }
1564
1565 if (do_ipv6 == AF_UNSPEC && filter.tb)
1566 do_ipv6 = AF_INET;
1567
1568 if (id || od) {
1569 int idx;
1570
1571 if (id) {
1572 if ((idx = ll_name_to_index(id)) == 0) {
1573 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1574 return -1;
1575 }
1576 filter.iif = idx;
1577 filter.iifmask = -1;
1578 }
1579 if (od) {
1580 if ((idx = ll_name_to_index(od)) == 0) {
1581 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1582 return -1;
1583 }
1584 filter.oif = idx;
1585 filter.oifmask = -1;
1586 }
1587 }
1588 filter.mark = mark;
1589
1590 if (action == IPROUTE_FLUSH) {
1591 int round = 0;
1592 char flushb[4096-512];
1593 time_t start = time(0);
1594
1595 if (filter.cloned) {
1596 if (do_ipv6 != AF_INET6) {
1597 iproute_flush_cache();
1598 if (show_stats)
1599 printf("*** IPv4 routing cache is flushed.\n");
1600 }
1601 if (do_ipv6 == AF_INET)
1602 return 0;
1603 }
1604
1605 filter.flushb = flushb;
1606 filter.flushp = 0;
1607 filter.flushe = sizeof(flushb);
1608
1609 for (;;) {
1610 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1611 perror("Cannot send dump request");
1612 return -2;
1613 }
1614 filter.flushed = 0;
1615 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1616 fprintf(stderr, "Flush terminated\n");
1617 return -2;
1618 }
1619 if (filter.flushed == 0) {
1620 if (show_stats) {
1621 if (round == 0 && (!filter.cloned || do_ipv6 == AF_INET6))
1622 printf("Nothing to flush.\n");
1623 else
1624 printf("*** Flush is complete after %d round%s ***\n", round, round > 1?"s":"");
1625 }
1626 fflush(stdout);
1627 return 0;
1628 }
1629 round++;
1630 if ((ret = flush_update()) < 0)
1631 return ret;
1632
1633 if (time(0) - start > 30) {
1634 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1635 (long)(time(0) - start), filter.flushed);
1636 return -1;
1637 }
1638
1639 if (show_stats) {
1640 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1641 fflush(stdout);
1642 }
1643 }
1644 }
1645
1646 if (!filter.cloned) {
1647 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1648 perror("Cannot send dump request");
1649 return -2;
1650 }
1651 } else {
1652 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1653 perror("Cannot send dump request");
1654 return -2;
1655 }
1656 }
1657
1658 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1659 fprintf(stderr, "Dump terminated\n");
1660 return -2;
1661 }
1662
1663 return 0;
1664 }
1665
1666
1667 static int iproute_get(int argc, char **argv)
1668 {
1669 struct {
1670 struct nlmsghdr n;
1671 struct rtmsg r;
1672 char buf[1024];
1673 } req = {
1674 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1675 .n.nlmsg_flags = NLM_F_REQUEST,
1676 .n.nlmsg_type = RTM_GETROUTE,
1677 .r.rtm_family = preferred_family,
1678 };
1679 char *idev = NULL;
1680 char *odev = NULL;
1681 int connected = 0;
1682 int fib_match = 0;
1683 int from_ok = 0;
1684 unsigned int mark = 0;
1685
1686 iproute_reset_filter(0);
1687 filter.cloned = 2;
1688
1689 while (argc > 0) {
1690 if (strcmp(*argv, "tos") == 0 ||
1691 matches(*argv, "dsfield") == 0) {
1692 __u32 tos;
1693
1694 NEXT_ARG();
1695 if (rtnl_dsfield_a2n(&tos, *argv))
1696 invarg("TOS value is invalid\n", *argv);
1697 req.r.rtm_tos = tos;
1698 } else if (matches(*argv, "from") == 0) {
1699 inet_prefix addr;
1700
1701 NEXT_ARG();
1702 if (matches(*argv, "help") == 0)
1703 usage();
1704 from_ok = 1;
1705 get_prefix(&addr, *argv, req.r.rtm_family);
1706 if (req.r.rtm_family == AF_UNSPEC)
1707 req.r.rtm_family = addr.family;
1708 if (addr.bytelen)
1709 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1710 req.r.rtm_src_len = addr.bitlen;
1711 } else if (matches(*argv, "iif") == 0) {
1712 NEXT_ARG();
1713 idev = *argv;
1714 } else if (matches(*argv, "mark") == 0) {
1715 NEXT_ARG();
1716 if (get_unsigned(&mark, *argv, 0))
1717 invarg("invalid mark value", *argv);
1718 } else if (matches(*argv, "oif") == 0 ||
1719 strcmp(*argv, "dev") == 0) {
1720 NEXT_ARG();
1721 odev = *argv;
1722 } else if (matches(*argv, "notify") == 0) {
1723 req.r.rtm_flags |= RTM_F_NOTIFY;
1724 } else if (matches(*argv, "connected") == 0) {
1725 connected = 1;
1726 } else if (matches(*argv, "vrf") == 0) {
1727 NEXT_ARG();
1728 if (!name_is_vrf(*argv))
1729 invarg("Invalid VRF\n", *argv);
1730 odev = *argv;
1731 } else if (matches(*argv, "uid") == 0) {
1732 uid_t uid;
1733
1734 NEXT_ARG();
1735 if (get_unsigned(&uid, *argv, 0))
1736 invarg("invalid UID\n", *argv);
1737 addattr32(&req.n, sizeof(req), RTA_UID, uid);
1738 } else if (matches(*argv, "fibmatch") == 0) {
1739 fib_match = 1;
1740 } else if (strcmp(*argv, "as") == 0) {
1741 inet_prefix addr;
1742
1743 NEXT_ARG();
1744 if (strcmp(*argv, "to") == 0)
1745 NEXT_ARG();
1746 get_addr(&addr, *argv, req.r.rtm_family);
1747 if (req.r.rtm_family == AF_UNSPEC)
1748 req.r.rtm_family = addr.family;
1749 addattr_l(&req.n, sizeof(req), RTA_NEWDST, &addr.data, addr.bytelen);
1750 } else {
1751 inet_prefix addr;
1752
1753 if (strcmp(*argv, "to") == 0) {
1754 NEXT_ARG();
1755 }
1756 if (matches(*argv, "help") == 0)
1757 usage();
1758 get_prefix(&addr, *argv, req.r.rtm_family);
1759 if (req.r.rtm_family == AF_UNSPEC)
1760 req.r.rtm_family = addr.family;
1761 if (addr.bytelen)
1762 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1763 req.r.rtm_dst_len = addr.bitlen;
1764 }
1765 argc--; argv++;
1766 }
1767
1768 if (req.r.rtm_dst_len == 0) {
1769 fprintf(stderr, "need at least a destination address\n");
1770 return -1;
1771 }
1772
1773 if (idev || odev) {
1774 int idx;
1775
1776 if (idev) {
1777 if ((idx = ll_name_to_index(idev)) == 0) {
1778 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1779 return -1;
1780 }
1781 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1782 }
1783 if (odev) {
1784 if ((idx = ll_name_to_index(odev)) == 0) {
1785 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1786 return -1;
1787 }
1788 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1789 }
1790 }
1791 if (mark)
1792 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
1793
1794 if (req.r.rtm_family == AF_UNSPEC)
1795 req.r.rtm_family = AF_INET;
1796
1797 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
1798 if (fib_match)
1799 req.r.rtm_flags |= RTM_F_FIB_MATCH;
1800
1801 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
1802 return -2;
1803
1804 if (connected && !from_ok) {
1805 struct rtmsg *r = NLMSG_DATA(&req.n);
1806 int len = req.n.nlmsg_len;
1807 struct rtattr *tb[RTA_MAX+1];
1808
1809 if (print_route(NULL, &req.n, (void *)stdout) < 0) {
1810 fprintf(stderr, "An error :-)\n");
1811 return -1;
1812 }
1813
1814 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1815 fprintf(stderr, "Not a route?\n");
1816 return -1;
1817 }
1818 len -= NLMSG_LENGTH(sizeof(*r));
1819 if (len < 0) {
1820 fprintf(stderr, "Wrong len %d\n", len);
1821 return -1;
1822 }
1823
1824 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1825
1826 if (tb[RTA_PREFSRC]) {
1827 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1828 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1829 } else if (!tb[RTA_SRC]) {
1830 fprintf(stderr, "Failed to connect the route\n");
1831 return -1;
1832 }
1833 if (!odev && tb[RTA_OIF])
1834 tb[RTA_OIF]->rta_type = 0;
1835 if (tb[RTA_GATEWAY])
1836 tb[RTA_GATEWAY]->rta_type = 0;
1837 if (tb[RTA_VIA])
1838 tb[RTA_VIA]->rta_type = 0;
1839 if (!idev && tb[RTA_IIF])
1840 tb[RTA_IIF]->rta_type = 0;
1841 req.n.nlmsg_flags = NLM_F_REQUEST;
1842 req.n.nlmsg_type = RTM_GETROUTE;
1843
1844 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
1845 return -2;
1846 }
1847
1848 if (print_route(NULL, &req.n, (void *)stdout) < 0) {
1849 fprintf(stderr, "An error :-)\n");
1850 return -1;
1851 }
1852
1853 return 0;
1854 }
1855
1856 static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
1857 {
1858 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
1859 return 1;
1860
1861 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
1862 }
1863
1864 static int restore_handler(const struct sockaddr_nl *nl,
1865 struct rtnl_ctrl_data *ctrl,
1866 struct nlmsghdr *n, void *arg)
1867 {
1868 struct rtmsg *r = NLMSG_DATA(n);
1869 struct rtattr *tb[RTA_MAX+1];
1870 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
1871 int ret, prio = *(int *)arg;
1872
1873 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1874
1875 /* Restore routes in correct order:
1876 * 0. ones for local addresses,
1877 * 1. ones for local networks,
1878 * 2. others (remote networks/hosts).
1879 */
1880 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
1881 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
1882 goto restore;
1883 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
1884 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
1885 goto restore;
1886 else if (prio == 2 && tb[RTA_GATEWAY])
1887 goto restore;
1888
1889 return 0;
1890
1891 restore:
1892 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
1893
1894 ll_init_map(&rth);
1895
1896 ret = rtnl_talk(&rth, n, n, sizeof(*n));
1897 if ((ret < 0) && (errno == EEXIST))
1898 ret = 0;
1899
1900 return ret;
1901 }
1902
1903 static int route_dump_check_magic(void)
1904 {
1905 int ret;
1906 __u32 magic = 0;
1907
1908 if (isatty(STDIN_FILENO)) {
1909 fprintf(stderr, "Can't restore route dump from a terminal\n");
1910 return -1;
1911 }
1912
1913 ret = fread(&magic, sizeof(magic), 1, stdin);
1914 if (magic != route_dump_magic) {
1915 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
1916 return -1;
1917 }
1918
1919 return 0;
1920 }
1921
1922 static int iproute_restore(void)
1923 {
1924 int pos, prio;
1925
1926 if (route_dump_check_magic())
1927 return -1;
1928
1929 pos = ftell(stdin);
1930 if (pos == -1) {
1931 perror("Failed to restore: ftell");
1932 return -1;
1933 }
1934
1935 for (prio = 0; prio < 3; prio++) {
1936 int err;
1937
1938 err = rtnl_from_file(stdin, &restore_handler, &prio);
1939 if (err)
1940 return -2;
1941
1942 if (fseek(stdin, pos, SEEK_SET) == -1) {
1943 perror("Failed to restore: fseek");
1944 return -1;
1945 }
1946 }
1947
1948 return 0;
1949 }
1950
1951 static int show_handler(const struct sockaddr_nl *nl,
1952 struct rtnl_ctrl_data *ctrl,
1953 struct nlmsghdr *n, void *arg)
1954 {
1955 print_route(nl, n, stdout);
1956 return 0;
1957 }
1958
1959 static int iproute_showdump(void)
1960 {
1961 if (route_dump_check_magic())
1962 return -1;
1963
1964 if (rtnl_from_file(stdin, &show_handler, NULL))
1965 return -2;
1966
1967 return 0;
1968 }
1969
1970 void iproute_reset_filter(int ifindex)
1971 {
1972 memset(&filter, 0, sizeof(filter));
1973 filter.mdst.bitlen = -1;
1974 filter.msrc.bitlen = -1;
1975 filter.oif = ifindex;
1976 if (filter.oif > 0)
1977 filter.oifmask = -1;
1978 }
1979
1980 int do_iproute(int argc, char **argv)
1981 {
1982 if (argc < 1)
1983 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
1984
1985 if (matches(*argv, "add") == 0)
1986 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1987 argc-1, argv+1);
1988 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1989 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1990 argc-1, argv+1);
1991 if (matches(*argv, "replace") == 0)
1992 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1993 argc-1, argv+1);
1994 if (matches(*argv, "prepend") == 0)
1995 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1996 argc-1, argv+1);
1997 if (matches(*argv, "append") == 0)
1998 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
1999 argc-1, argv+1);
2000 if (matches(*argv, "test") == 0)
2001 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
2002 argc-1, argv+1);
2003 if (matches(*argv, "delete") == 0)
2004 return iproute_modify(RTM_DELROUTE, 0,
2005 argc-1, argv+1);
2006 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2007 || matches(*argv, "lst") == 0)
2008 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
2009 if (matches(*argv, "get") == 0)
2010 return iproute_get(argc-1, argv+1);
2011 if (matches(*argv, "flush") == 0)
2012 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2013 if (matches(*argv, "save") == 0)
2014 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2015 if (matches(*argv, "restore") == 0)
2016 return iproute_restore();
2017 if (matches(*argv, "showdump") == 0)
2018 return iproute_showdump();
2019 if (matches(*argv, "help") == 0)
2020 usage();
2021 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
2022 exit(-1);
2023 }
Upstream mirror of iproute2