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