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ip route: replace exits with returns
[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 = 0;
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 else
640 fprintf(fp, " ");
641 } else
642 fprintf(fp, "%s\tnexthop ", _SL_);
643 if (nh->rtnh_len > sizeof(*nh)) {
644 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh));
645
646 if (tb[RTA_ENCAP])
647 lwt_print_encap(fp,
648 tb[RTA_ENCAP_TYPE],
649 tb[RTA_ENCAP]);
650 if (tb[RTA_NEWDST]) {
651 fprintf(fp, "as to %s ",
652 format_host_rta(r->rtm_family,
653 tb[RTA_NEWDST]));
654 }
655 if (tb[RTA_GATEWAY]) {
656 fprintf(fp, "via %s ",
657 format_host_rta(r->rtm_family,
658 tb[RTA_GATEWAY]));
659 }
660 if (tb[RTA_VIA]) {
661 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
662 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
663
664 fprintf(fp, "via %s %s ",
665 family_name(via->rtvia_family),
666 format_host(via->rtvia_family, len, via->rtvia_addr));
667 }
668 if (tb[RTA_FLOW]) {
669 __u32 to = rta_getattr_u32(tb[RTA_FLOW]);
670 __u32 from = to>>16;
671
672 to &= 0xFFFF;
673 fprintf(fp, "realm%s ", from ? "s" : "");
674 if (from) {
675 fprintf(fp, "%s/",
676 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
677 }
678 fprintf(fp, "%s ",
679 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
680 }
681 }
682 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
683 fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
684 if (nh->rtnh_hops != 1)
685 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
686 fprintf(fp, " ");
687 } else {
688 fprintf(fp, "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
689 if (r->rtm_family != AF_MPLS)
690 fprintf(fp, "weight %d ",
691 nh->rtnh_hops+1);
692 }
693 if (nh->rtnh_flags & RTNH_F_DEAD)
694 fprintf(fp, "dead ");
695 if (nh->rtnh_flags & RTNH_F_ONLINK)
696 fprintf(fp, "onlink ");
697 if (nh->rtnh_flags & RTNH_F_PERVASIVE)
698 fprintf(fp, "pervasive ");
699 if (nh->rtnh_flags & RTNH_F_LINKDOWN)
700 fprintf(fp, "linkdown ");
701 len -= NLMSG_ALIGN(nh->rtnh_len);
702 nh = RTNH_NEXT(nh);
703 }
704 }
705 if (tb[RTA_PREF]) {
706 unsigned int pref = rta_getattr_u8(tb[RTA_PREF]);
707
708 fprintf(fp, "pref ");
709
710 switch (pref) {
711 case ICMPV6_ROUTER_PREF_LOW:
712 fprintf(fp, "low");
713 break;
714 case ICMPV6_ROUTER_PREF_MEDIUM:
715 fprintf(fp, "medium");
716 break;
717 case ICMPV6_ROUTER_PREF_HIGH:
718 fprintf(fp, "high");
719 break;
720 default:
721 fprintf(fp, "%u", pref);
722 }
723 }
724 if (tb[RTA_TTL_PROPAGATE]) {
725 fprintf(fp, "ttl-propagate ");
726 if (rta_getattr_u8(tb[RTA_TTL_PROPAGATE]))
727 fprintf(fp, "enabled");
728 else
729 fprintf(fp, "disabled");
730 }
731 fprintf(fp, "\n");
732 fflush(fp);
733 return 0;
734 }
735
736 static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
737 struct rtattr *rta, struct rtnexthop *rtnh,
738 int *argcp, char ***argvp)
739 {
740 int argc = *argcp;
741 char **argv = *argvp;
742
743 while (++argv, --argc > 0) {
744 if (strcmp(*argv, "via") == 0) {
745 inet_prefix addr;
746 int family;
747
748 NEXT_ARG();
749 family = read_family(*argv);
750 if (family == AF_UNSPEC)
751 family = r->rtm_family;
752 else
753 NEXT_ARG();
754 get_addr(&addr, *argv, family);
755 if (r->rtm_family == AF_UNSPEC)
756 r->rtm_family = addr.family;
757 if (addr.family == r->rtm_family) {
758 rta_addattr_l(rta, 4096, RTA_GATEWAY, &addr.data, addr.bytelen);
759 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
760 } else {
761 rta_addattr_l(rta, 4096, RTA_VIA, &addr.family, addr.bytelen+2);
762 rtnh->rtnh_len += RTA_SPACE(addr.bytelen+2);
763 }
764 } else if (strcmp(*argv, "dev") == 0) {
765 NEXT_ARG();
766 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
767 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
768 return -1;
769 }
770 } else if (strcmp(*argv, "weight") == 0) {
771 unsigned int w;
772
773 NEXT_ARG();
774 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
775 invarg("\"weight\" is invalid\n", *argv);
776 rtnh->rtnh_hops = w - 1;
777 } else if (strcmp(*argv, "onlink") == 0) {
778 rtnh->rtnh_flags |= RTNH_F_ONLINK;
779 } else if (matches(*argv, "realms") == 0) {
780 __u32 realm;
781
782 NEXT_ARG();
783 if (get_rt_realms_or_raw(&realm, *argv))
784 invarg("\"realm\" value is invalid\n", *argv);
785 rta_addattr32(rta, 4096, RTA_FLOW, realm);
786 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
787 } else if (strcmp(*argv, "encap") == 0) {
788 int len = rta->rta_len;
789
790 lwt_parse_encap(rta, 4096, &argc, &argv);
791 rtnh->rtnh_len += rta->rta_len - len;
792 } else if (strcmp(*argv, "as") == 0) {
793 inet_prefix addr;
794
795 NEXT_ARG();
796 if (strcmp(*argv, "to") == 0)
797 NEXT_ARG();
798 get_addr(&addr, *argv, r->rtm_family);
799 rta_addattr_l(rta, 4096, RTA_NEWDST, &addr.data,
800 addr.bytelen);
801 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
802 } else
803 break;
804 }
805 *argcp = argc;
806 *argvp = argv;
807 return 0;
808 }
809
810 static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
811 int argc, char **argv)
812 {
813 char buf[1024];
814 struct rtattr *rta = (void *)buf;
815 struct rtnexthop *rtnh;
816
817 rta->rta_type = RTA_MULTIPATH;
818 rta->rta_len = RTA_LENGTH(0);
819 rtnh = RTA_DATA(rta);
820
821 while (argc > 0) {
822 if (strcmp(*argv, "nexthop") != 0) {
823 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
824 exit(-1);
825 }
826 if (argc <= 1) {
827 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
828 exit(-1);
829 }
830 memset(rtnh, 0, sizeof(*rtnh));
831 rtnh->rtnh_len = sizeof(*rtnh);
832 rta->rta_len += rtnh->rtnh_len;
833 parse_one_nh(n, r, rta, rtnh, &argc, &argv);
834 rtnh = RTNH_NEXT(rtnh);
835 }
836
837 if (rta->rta_len > RTA_LENGTH(0))
838 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
839 return 0;
840 }
841
842 static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
843 {
844 struct {
845 struct nlmsghdr n;
846 struct rtmsg r;
847 char buf[1024];
848 } req = {
849 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
850 .n.nlmsg_flags = NLM_F_REQUEST | flags,
851 .n.nlmsg_type = cmd,
852 .r.rtm_family = preferred_family,
853 .r.rtm_table = RT_TABLE_MAIN,
854 .r.rtm_scope = RT_SCOPE_NOWHERE,
855 };
856 char mxbuf[256];
857 struct rtattr *mxrta = (void *)mxbuf;
858 unsigned int mxlock = 0;
859 char *d = NULL;
860 int gw_ok = 0;
861 int dst_ok = 0;
862 int nhs_ok = 0;
863 int scope_ok = 0;
864 int table_ok = 0;
865 int raw = 0;
866 int type_ok = 0;
867
868 if (cmd != RTM_DELROUTE) {
869 req.r.rtm_protocol = RTPROT_BOOT;
870 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
871 req.r.rtm_type = RTN_UNICAST;
872 }
873
874 mxrta->rta_type = RTA_METRICS;
875 mxrta->rta_len = RTA_LENGTH(0);
876
877 while (argc > 0) {
878 if (strcmp(*argv, "src") == 0) {
879 inet_prefix addr;
880
881 NEXT_ARG();
882 get_addr(&addr, *argv, req.r.rtm_family);
883 if (req.r.rtm_family == AF_UNSPEC)
884 req.r.rtm_family = addr.family;
885 addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
886 } else if (strcmp(*argv, "as") == 0) {
887 inet_prefix addr;
888
889 NEXT_ARG();
890 if (strcmp(*argv, "to") == 0) {
891 NEXT_ARG();
892 }
893 get_addr(&addr, *argv, req.r.rtm_family);
894 if (req.r.rtm_family == AF_UNSPEC)
895 req.r.rtm_family = addr.family;
896 addattr_l(&req.n, sizeof(req), RTA_NEWDST, &addr.data, addr.bytelen);
897 } else if (strcmp(*argv, "via") == 0) {
898 inet_prefix addr;
899 int family;
900
901 if (gw_ok) {
902 invarg("use nexthop syntax to specify multiple via\n",
903 *argv);
904 }
905 gw_ok = 1;
906 NEXT_ARG();
907 family = read_family(*argv);
908 if (family == AF_UNSPEC)
909 family = req.r.rtm_family;
910 else
911 NEXT_ARG();
912 get_addr(&addr, *argv, family);
913 if (req.r.rtm_family == AF_UNSPEC)
914 req.r.rtm_family = addr.family;
915 if (addr.family == req.r.rtm_family)
916 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
917 &addr.data, addr.bytelen);
918 else
919 addattr_l(&req.n, sizeof(req), RTA_VIA,
920 &addr.family, addr.bytelen+2);
921 } else if (strcmp(*argv, "from") == 0) {
922 inet_prefix addr;
923
924 NEXT_ARG();
925 get_prefix(&addr, *argv, req.r.rtm_family);
926 if (req.r.rtm_family == AF_UNSPEC)
927 req.r.rtm_family = addr.family;
928 if (addr.bytelen)
929 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
930 req.r.rtm_src_len = addr.bitlen;
931 } else if (strcmp(*argv, "tos") == 0 ||
932 matches(*argv, "dsfield") == 0) {
933 __u32 tos;
934
935 NEXT_ARG();
936 if (rtnl_dsfield_a2n(&tos, *argv))
937 invarg("\"tos\" value is invalid\n", *argv);
938 req.r.rtm_tos = tos;
939 } else if (strcmp(*argv, "expires") == 0) {
940 __u32 expires;
941
942 NEXT_ARG();
943 if (get_u32(&expires, *argv, 0))
944 invarg("\"expires\" value is invalid\n", *argv);
945 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
946 } else if (matches(*argv, "metric") == 0 ||
947 matches(*argv, "priority") == 0 ||
948 strcmp(*argv, "preference") == 0) {
949 __u32 metric;
950
951 NEXT_ARG();
952 if (get_u32(&metric, *argv, 0))
953 invarg("\"metric\" value is invalid\n", *argv);
954 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
955 } else if (strcmp(*argv, "scope") == 0) {
956 __u32 scope = 0;
957
958 NEXT_ARG();
959 if (rtnl_rtscope_a2n(&scope, *argv))
960 invarg("invalid \"scope\" value\n", *argv);
961 req.r.rtm_scope = scope;
962 scope_ok = 1;
963 } else if (strcmp(*argv, "mtu") == 0) {
964 unsigned int mtu;
965
966 NEXT_ARG();
967 if (strcmp(*argv, "lock") == 0) {
968 mxlock |= (1<<RTAX_MTU);
969 NEXT_ARG();
970 }
971 if (get_unsigned(&mtu, *argv, 0))
972 invarg("\"mtu\" value is invalid\n", *argv);
973 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
974 } else if (strcmp(*argv, "hoplimit") == 0) {
975 unsigned int hoplimit;
976
977 NEXT_ARG();
978 if (strcmp(*argv, "lock") == 0) {
979 mxlock |= (1<<RTAX_HOPLIMIT);
980 NEXT_ARG();
981 }
982 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
983 invarg("\"hoplimit\" value is invalid\n", *argv);
984 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
985 } else if (strcmp(*argv, "advmss") == 0) {
986 unsigned int mss;
987
988 NEXT_ARG();
989 if (strcmp(*argv, "lock") == 0) {
990 mxlock |= (1<<RTAX_ADVMSS);
991 NEXT_ARG();
992 }
993 if (get_unsigned(&mss, *argv, 0))
994 invarg("\"mss\" value is invalid\n", *argv);
995 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
996 } else if (matches(*argv, "reordering") == 0) {
997 unsigned int reord;
998
999 NEXT_ARG();
1000 if (strcmp(*argv, "lock") == 0) {
1001 mxlock |= (1<<RTAX_REORDERING);
1002 NEXT_ARG();
1003 }
1004 if (get_unsigned(&reord, *argv, 0))
1005 invarg("\"reordering\" value is invalid\n", *argv);
1006 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1007 } else if (strcmp(*argv, "rtt") == 0) {
1008 unsigned int rtt;
1009
1010 NEXT_ARG();
1011 if (strcmp(*argv, "lock") == 0) {
1012 mxlock |= (1<<RTAX_RTT);
1013 NEXT_ARG();
1014 }
1015 if (get_time_rtt(&rtt, *argv, &raw))
1016 invarg("\"rtt\" value is invalid\n", *argv);
1017 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1018 (raw) ? rtt : rtt * 8);
1019 } else if (strcmp(*argv, "rto_min") == 0) {
1020 unsigned int rto_min;
1021
1022 NEXT_ARG();
1023 mxlock |= (1<<RTAX_RTO_MIN);
1024 if (get_time_rtt(&rto_min, *argv, &raw))
1025 invarg("\"rto_min\" value is invalid\n",
1026 *argv);
1027 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1028 rto_min);
1029 } else if (matches(*argv, "window") == 0) {
1030 unsigned int win;
1031
1032 NEXT_ARG();
1033 if (strcmp(*argv, "lock") == 0) {
1034 mxlock |= (1<<RTAX_WINDOW);
1035 NEXT_ARG();
1036 }
1037 if (get_unsigned(&win, *argv, 0))
1038 invarg("\"window\" value is invalid\n", *argv);
1039 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1040 } else if (matches(*argv, "cwnd") == 0) {
1041 unsigned int win;
1042
1043 NEXT_ARG();
1044 if (strcmp(*argv, "lock") == 0) {
1045 mxlock |= (1<<RTAX_CWND);
1046 NEXT_ARG();
1047 }
1048 if (get_unsigned(&win, *argv, 0))
1049 invarg("\"cwnd\" value is invalid\n", *argv);
1050 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1051 } else if (matches(*argv, "initcwnd") == 0) {
1052 unsigned int win;
1053
1054 NEXT_ARG();
1055 if (strcmp(*argv, "lock") == 0) {
1056 mxlock |= (1<<RTAX_INITCWND);
1057 NEXT_ARG();
1058 }
1059 if (get_unsigned(&win, *argv, 0))
1060 invarg("\"initcwnd\" value is invalid\n", *argv);
1061 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITCWND, win);
1062 } else if (matches(*argv, "initrwnd") == 0) {
1063 unsigned int win;
1064
1065 NEXT_ARG();
1066 if (strcmp(*argv, "lock") == 0) {
1067 mxlock |= (1<<RTAX_INITRWND);
1068 NEXT_ARG();
1069 }
1070 if (get_unsigned(&win, *argv, 0))
1071 invarg("\"initrwnd\" value is invalid\n", *argv);
1072 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITRWND, win);
1073 } else if (matches(*argv, "features") == 0) {
1074 unsigned int features = 0;
1075
1076 while (argc > 0) {
1077 NEXT_ARG();
1078
1079 if (strcmp(*argv, "ecn") == 0)
1080 features |= RTAX_FEATURE_ECN;
1081 else
1082 invarg("\"features\" value not valid\n", *argv);
1083 break;
1084 }
1085
1086 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FEATURES, features);
1087 } else if (matches(*argv, "quickack") == 0) {
1088 unsigned int quickack;
1089
1090 NEXT_ARG();
1091 if (get_unsigned(&quickack, *argv, 0))
1092 invarg("\"quickack\" value is invalid\n", *argv);
1093 if (quickack != 1 && quickack != 0)
1094 invarg("\"quickack\" value should be 0 or 1\n", *argv);
1095 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_QUICKACK, quickack);
1096 } else if (matches(*argv, "congctl") == 0) {
1097 NEXT_ARG();
1098 if (strcmp(*argv, "lock") == 0) {
1099 mxlock |= 1 << RTAX_CC_ALGO;
1100 NEXT_ARG();
1101 }
1102 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1103 strlen(*argv));
1104 } else if (matches(*argv, "rttvar") == 0) {
1105 unsigned int win;
1106
1107 NEXT_ARG();
1108 if (strcmp(*argv, "lock") == 0) {
1109 mxlock |= (1<<RTAX_RTTVAR);
1110 NEXT_ARG();
1111 }
1112 if (get_time_rtt(&win, *argv, &raw))
1113 invarg("\"rttvar\" value is invalid\n", *argv);
1114 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1115 (raw) ? win : win * 4);
1116 } else if (matches(*argv, "ssthresh") == 0) {
1117 unsigned int win;
1118
1119 NEXT_ARG();
1120 if (strcmp(*argv, "lock") == 0) {
1121 mxlock |= (1<<RTAX_SSTHRESH);
1122 NEXT_ARG();
1123 }
1124 if (get_unsigned(&win, *argv, 0))
1125 invarg("\"ssthresh\" value is invalid\n", *argv);
1126 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1127 } else if (matches(*argv, "realms") == 0) {
1128 __u32 realm;
1129
1130 NEXT_ARG();
1131 if (get_rt_realms_or_raw(&realm, *argv))
1132 invarg("\"realm\" value is invalid\n", *argv);
1133 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1134 } else if (strcmp(*argv, "onlink") == 0) {
1135 req.r.rtm_flags |= RTNH_F_ONLINK;
1136 } else if (strcmp(*argv, "nexthop") == 0) {
1137 nhs_ok = 1;
1138 break;
1139 } else if (matches(*argv, "protocol") == 0) {
1140 __u32 prot;
1141
1142 NEXT_ARG();
1143 if (rtnl_rtprot_a2n(&prot, *argv))
1144 invarg("\"protocol\" value is invalid\n", *argv);
1145 req.r.rtm_protocol = prot;
1146 } else if (matches(*argv, "table") == 0) {
1147 __u32 tid;
1148
1149 NEXT_ARG();
1150 if (rtnl_rttable_a2n(&tid, *argv))
1151 invarg("\"table\" value is invalid\n", *argv);
1152 if (tid < 256)
1153 req.r.rtm_table = tid;
1154 else {
1155 req.r.rtm_table = RT_TABLE_UNSPEC;
1156 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1157 }
1158 table_ok = 1;
1159 } else if (matches(*argv, "vrf") == 0) {
1160 __u32 tid;
1161
1162 NEXT_ARG();
1163 tid = ipvrf_get_table(*argv);
1164 if (tid == 0)
1165 invarg("Invalid VRF\n", *argv);
1166 if (tid < 256)
1167 req.r.rtm_table = tid;
1168 else {
1169 req.r.rtm_table = RT_TABLE_UNSPEC;
1170 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1171 }
1172 table_ok = 1;
1173 } else if (strcmp(*argv, "dev") == 0 ||
1174 strcmp(*argv, "oif") == 0) {
1175 NEXT_ARG();
1176 d = *argv;
1177 } else if (matches(*argv, "pref") == 0) {
1178 __u8 pref;
1179
1180 NEXT_ARG();
1181 if (strcmp(*argv, "low") == 0)
1182 pref = ICMPV6_ROUTER_PREF_LOW;
1183 else if (strcmp(*argv, "medium") == 0)
1184 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1185 else if (strcmp(*argv, "high") == 0)
1186 pref = ICMPV6_ROUTER_PREF_HIGH;
1187 else if (get_u8(&pref, *argv, 0))
1188 invarg("\"pref\" value is invalid\n", *argv);
1189 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1190 } else if (strcmp(*argv, "encap") == 0) {
1191 char buf[1024];
1192 struct rtattr *rta = (void *)buf;
1193
1194 rta->rta_type = RTA_ENCAP;
1195 rta->rta_len = RTA_LENGTH(0);
1196
1197 lwt_parse_encap(rta, sizeof(buf), &argc, &argv);
1198
1199 if (rta->rta_len > RTA_LENGTH(0))
1200 addraw_l(&req.n, 1024, RTA_DATA(rta), RTA_PAYLOAD(rta));
1201 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1202 __u8 ttl_prop;
1203
1204 NEXT_ARG();
1205 if (matches(*argv, "enabled") == 0)
1206 ttl_prop = 1;
1207 else if (matches(*argv, "disabled") == 0)
1208 ttl_prop = 0;
1209 else
1210 invarg("\"ttl-propagate\" value is invalid\n",
1211 *argv);
1212
1213 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1214 ttl_prop);
1215 } else {
1216 int type;
1217 inet_prefix dst;
1218
1219 if (strcmp(*argv, "to") == 0) {
1220 NEXT_ARG();
1221 }
1222 if ((**argv < '0' || **argv > '9') &&
1223 rtnl_rtntype_a2n(&type, *argv) == 0) {
1224 NEXT_ARG();
1225 req.r.rtm_type = type;
1226 type_ok = 1;
1227 }
1228
1229 if (matches(*argv, "help") == 0)
1230 usage();
1231 if (dst_ok)
1232 duparg2("to", *argv);
1233 get_prefix(&dst, *argv, req.r.rtm_family);
1234 if (req.r.rtm_family == AF_UNSPEC)
1235 req.r.rtm_family = dst.family;
1236 req.r.rtm_dst_len = dst.bitlen;
1237 dst_ok = 1;
1238 if (dst.bytelen)
1239 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
1240 }
1241 argc--; argv++;
1242 }
1243
1244 if (!dst_ok)
1245 usage();
1246
1247 if (d) {
1248 int idx;
1249
1250 if ((idx = ll_name_to_index(d)) == 0) {
1251 fprintf(stderr, "Cannot find device \"%s\"\n", d);
1252 return -1;
1253 }
1254 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1255 }
1256
1257 if (mxrta->rta_len > RTA_LENGTH(0)) {
1258 if (mxlock)
1259 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1260 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1261 }
1262
1263 if (nhs_ok)
1264 parse_nexthops(&req.n, &req.r, argc, argv);
1265
1266 if (req.r.rtm_family == AF_UNSPEC)
1267 req.r.rtm_family = AF_INET;
1268
1269 if (!table_ok) {
1270 if (req.r.rtm_type == RTN_LOCAL ||
1271 req.r.rtm_type == RTN_BROADCAST ||
1272 req.r.rtm_type == RTN_NAT ||
1273 req.r.rtm_type == RTN_ANYCAST)
1274 req.r.rtm_table = RT_TABLE_LOCAL;
1275 }
1276 if (!scope_ok) {
1277 if (req.r.rtm_family == AF_INET6 ||
1278 req.r.rtm_family == AF_MPLS)
1279 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1280 else if (req.r.rtm_type == RTN_LOCAL ||
1281 req.r.rtm_type == RTN_NAT)
1282 req.r.rtm_scope = RT_SCOPE_HOST;
1283 else if (req.r.rtm_type == RTN_BROADCAST ||
1284 req.r.rtm_type == RTN_MULTICAST ||
1285 req.r.rtm_type == RTN_ANYCAST)
1286 req.r.rtm_scope = RT_SCOPE_LINK;
1287 else if (req.r.rtm_type == RTN_UNICAST ||
1288 req.r.rtm_type == RTN_UNSPEC) {
1289 if (cmd == RTM_DELROUTE)
1290 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1291 else if (!gw_ok && !nhs_ok)
1292 req.r.rtm_scope = RT_SCOPE_LINK;
1293 }
1294 }
1295
1296 if (!type_ok && req.r.rtm_family == AF_MPLS)
1297 req.r.rtm_type = RTN_UNICAST;
1298
1299 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
1300 return -2;
1301
1302 return 0;
1303 }
1304
1305 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
1306 {
1307 struct {
1308 struct nlmsghdr nlh;
1309 struct rtmsg rtm;
1310 } req = {
1311 .nlh.nlmsg_len = sizeof(req),
1312 .nlh.nlmsg_type = RTM_GETROUTE,
1313 .nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST,
1314 .nlh.nlmsg_seq = rth->dump = ++rth->seq,
1315 .rtm.rtm_family = family,
1316 .rtm.rtm_flags = RTM_F_CLONED,
1317 };
1318 struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
1319
1320 return sendto(rth->fd, (void *)&req, sizeof(req), 0, (struct sockaddr *)&nladdr, sizeof(nladdr));
1321 }
1322
1323 static int iproute_flush_cache(void)
1324 {
1325 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1326
1327 int len;
1328 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1329 char *buffer = "-1";
1330
1331 if (flush_fd < 0) {
1332 fprintf(stderr, "Cannot open \"%s\": %s\n",
1333 ROUTE_FLUSH_PATH, strerror(errno));
1334 return -1;
1335 }
1336
1337 len = strlen(buffer);
1338
1339 if ((write(flush_fd, (void *)buffer, len)) < len) {
1340 fprintf(stderr, "Cannot flush routing cache\n");
1341 close(flush_fd);
1342 return -1;
1343 }
1344 close(flush_fd);
1345 return 0;
1346 }
1347
1348 static __u32 route_dump_magic = 0x45311224;
1349
1350 static int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n,
1351 void *arg)
1352 {
1353 int ret;
1354 int len = n->nlmsg_len;
1355 struct rtmsg *r = NLMSG_DATA(n);
1356 struct rtattr *tb[RTA_MAX+1];
1357 int host_len;
1358
1359 host_len = af_bit_len(r->rtm_family);
1360 len -= NLMSG_LENGTH(sizeof(*r));
1361 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1362
1363 if (!filter_nlmsg(n, tb, host_len))
1364 return 0;
1365
1366 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1367 if ((ret > 0) && (ret != n->nlmsg_len)) {
1368 fprintf(stderr, "Short write while saving nlmsg\n");
1369 ret = -EIO;
1370 }
1371
1372 return ret == n->nlmsg_len ? 0 : ret;
1373 }
1374
1375 static int save_route_prep(void)
1376 {
1377 int ret;
1378
1379 if (isatty(STDOUT_FILENO)) {
1380 fprintf(stderr, "Not sending a binary stream to stdout\n");
1381 return -1;
1382 }
1383
1384 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1385 if (ret != sizeof(route_dump_magic)) {
1386 fprintf(stderr, "Can't write magic to dump file\n");
1387 return -1;
1388 }
1389
1390 return 0;
1391 }
1392
1393 static int iproute_list_flush_or_save(int argc, char **argv, int action)
1394 {
1395 int do_ipv6 = preferred_family;
1396 char *id = NULL;
1397 char *od = NULL;
1398 unsigned int mark = 0;
1399 rtnl_filter_t filter_fn;
1400 int ret;
1401
1402 if (action == IPROUTE_SAVE) {
1403 if (save_route_prep())
1404 return -1;
1405
1406 filter_fn = save_route;
1407 } else
1408 filter_fn = print_route;
1409
1410 iproute_reset_filter(0);
1411 filter.tb = RT_TABLE_MAIN;
1412
1413 if ((action == IPROUTE_FLUSH) && argc <= 0) {
1414 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1415 return -1;
1416 }
1417
1418 while (argc > 0) {
1419 if (matches(*argv, "table") == 0) {
1420 __u32 tid;
1421
1422 NEXT_ARG();
1423 if (rtnl_rttable_a2n(&tid, *argv)) {
1424 if (strcmp(*argv, "all") == 0) {
1425 filter.tb = 0;
1426 } else if (strcmp(*argv, "cache") == 0) {
1427 filter.cloned = 1;
1428 } else if (strcmp(*argv, "help") == 0) {
1429 usage();
1430 } else {
1431 invarg("table id value is invalid\n", *argv);
1432 }
1433 } else
1434 filter.tb = tid;
1435 } else if (matches(*argv, "vrf") == 0) {
1436 __u32 tid;
1437
1438 NEXT_ARG();
1439 tid = ipvrf_get_table(*argv);
1440 if (tid == 0)
1441 invarg("Invalid VRF\n", *argv);
1442 filter.tb = tid;
1443 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1444 } else if (matches(*argv, "cached") == 0 ||
1445 matches(*argv, "cloned") == 0) {
1446 filter.cloned = 1;
1447 } else if (strcmp(*argv, "tos") == 0 ||
1448 matches(*argv, "dsfield") == 0) {
1449 __u32 tos;
1450
1451 NEXT_ARG();
1452 if (rtnl_dsfield_a2n(&tos, *argv))
1453 invarg("TOS value is invalid\n", *argv);
1454 filter.tos = tos;
1455 filter.tosmask = -1;
1456 } else if (matches(*argv, "protocol") == 0) {
1457 __u32 prot = 0;
1458
1459 NEXT_ARG();
1460 filter.protocolmask = -1;
1461 if (rtnl_rtprot_a2n(&prot, *argv)) {
1462 if (strcmp(*argv, "all") != 0)
1463 invarg("invalid \"protocol\"\n", *argv);
1464 prot = 0;
1465 filter.protocolmask = 0;
1466 }
1467 filter.protocol = prot;
1468 } else if (matches(*argv, "scope") == 0) {
1469 __u32 scope = 0;
1470
1471 NEXT_ARG();
1472 filter.scopemask = -1;
1473 if (rtnl_rtscope_a2n(&scope, *argv)) {
1474 if (strcmp(*argv, "all") != 0)
1475 invarg("invalid \"scope\"\n", *argv);
1476 scope = RT_SCOPE_NOWHERE;
1477 filter.scopemask = 0;
1478 }
1479 filter.scope = scope;
1480 } else if (matches(*argv, "type") == 0) {
1481 int type;
1482
1483 NEXT_ARG();
1484 if (rtnl_rtntype_a2n(&type, *argv))
1485 invarg("node type value is invalid\n", *argv);
1486 filter.typemask = (1<<type);
1487 } else if (strcmp(*argv, "dev") == 0 ||
1488 strcmp(*argv, "oif") == 0) {
1489 NEXT_ARG();
1490 od = *argv;
1491 } else if (strcmp(*argv, "iif") == 0) {
1492 NEXT_ARG();
1493 id = *argv;
1494 } else if (strcmp(*argv, "mark") == 0) {
1495 NEXT_ARG();
1496 get_unsigned(&mark, *argv, 0);
1497 filter.markmask = -1;
1498 } else if (strcmp(*argv, "via") == 0) {
1499 int family;
1500
1501 NEXT_ARG();
1502 family = read_family(*argv);
1503 if (family == AF_UNSPEC)
1504 family = do_ipv6;
1505 else
1506 NEXT_ARG();
1507 get_prefix(&filter.rvia, *argv, family);
1508 } else if (strcmp(*argv, "src") == 0) {
1509 NEXT_ARG();
1510 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1511 } else if (matches(*argv, "realms") == 0) {
1512 __u32 realm;
1513
1514 NEXT_ARG();
1515 if (get_rt_realms_or_raw(&realm, *argv))
1516 invarg("invalid realms\n", *argv);
1517 filter.realm = realm;
1518 filter.realmmask = ~0U;
1519 if ((filter.realm&0xFFFF) == 0 &&
1520 (*argv)[strlen(*argv) - 1] == '/')
1521 filter.realmmask &= ~0xFFFF;
1522 if ((filter.realm&0xFFFF0000U) == 0 &&
1523 (strchr(*argv, '/') == NULL ||
1524 (*argv)[0] == '/'))
1525 filter.realmmask &= ~0xFFFF0000U;
1526 } else if (matches(*argv, "from") == 0) {
1527 NEXT_ARG();
1528 if (matches(*argv, "root") == 0) {
1529 NEXT_ARG();
1530 get_prefix(&filter.rsrc, *argv, do_ipv6);
1531 } else if (matches(*argv, "match") == 0) {
1532 NEXT_ARG();
1533 get_prefix(&filter.msrc, *argv, do_ipv6);
1534 } else {
1535 if (matches(*argv, "exact") == 0) {
1536 NEXT_ARG();
1537 }
1538 get_prefix(&filter.msrc, *argv, do_ipv6);
1539 filter.rsrc = filter.msrc;
1540 }
1541 } else {
1542 if (matches(*argv, "to") == 0) {
1543 NEXT_ARG();
1544 }
1545 if (matches(*argv, "root") == 0) {
1546 NEXT_ARG();
1547 get_prefix(&filter.rdst, *argv, do_ipv6);
1548 } else if (matches(*argv, "match") == 0) {
1549 NEXT_ARG();
1550 get_prefix(&filter.mdst, *argv, do_ipv6);
1551 } else {
1552 if (matches(*argv, "exact") == 0) {
1553 NEXT_ARG();
1554 }
1555 get_prefix(&filter.mdst, *argv, do_ipv6);
1556 filter.rdst = filter.mdst;
1557 }
1558 }
1559 argc--; argv++;
1560 }
1561
1562 if (do_ipv6 == AF_UNSPEC && filter.tb)
1563 do_ipv6 = AF_INET;
1564
1565 if (id || od) {
1566 int idx;
1567
1568 if (id) {
1569 if ((idx = ll_name_to_index(id)) == 0) {
1570 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1571 return -1;
1572 }
1573 filter.iif = idx;
1574 filter.iifmask = -1;
1575 }
1576 if (od) {
1577 if ((idx = ll_name_to_index(od)) == 0) {
1578 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1579 return -1;
1580 }
1581 filter.oif = idx;
1582 filter.oifmask = -1;
1583 }
1584 }
1585 filter.mark = mark;
1586
1587 if (action == IPROUTE_FLUSH) {
1588 int round = 0;
1589 char flushb[4096-512];
1590 time_t start = time(0);
1591
1592 if (filter.cloned) {
1593 if (do_ipv6 != AF_INET6) {
1594 iproute_flush_cache();
1595 if (show_stats)
1596 printf("*** IPv4 routing cache is flushed.\n");
1597 }
1598 if (do_ipv6 == AF_INET)
1599 return 0;
1600 }
1601
1602 filter.flushb = flushb;
1603 filter.flushp = 0;
1604 filter.flushe = sizeof(flushb);
1605
1606 for (;;) {
1607 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1608 perror("Cannot send dump request");
1609 return -2;
1610 }
1611 filter.flushed = 0;
1612 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1613 fprintf(stderr, "Flush terminated\n");
1614 return -2;
1615 }
1616 if (filter.flushed == 0) {
1617 if (show_stats) {
1618 if (round == 0 && (!filter.cloned || do_ipv6 == AF_INET6))
1619 printf("Nothing to flush.\n");
1620 else
1621 printf("*** Flush is complete after %d round%s ***\n", round, round > 1?"s":"");
1622 }
1623 fflush(stdout);
1624 return 0;
1625 }
1626 round++;
1627 if ((ret = flush_update()) < 0)
1628 return ret;
1629
1630 if (time(0) - start > 30) {
1631 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1632 (long)(time(0) - start), filter.flushed);
1633 return -1;
1634 }
1635
1636 if (show_stats) {
1637 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1638 fflush(stdout);
1639 }
1640 }
1641 }
1642
1643 if (!filter.cloned) {
1644 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1645 perror("Cannot send dump request");
1646 return -2;
1647 }
1648 } else {
1649 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1650 perror("Cannot send dump request");
1651 return -2;
1652 }
1653 }
1654
1655 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1656 fprintf(stderr, "Dump terminated\n");
1657 return -2;
1658 }
1659
1660 return 0;
1661 }
1662
1663
1664 static int iproute_get(int argc, char **argv)
1665 {
1666 struct {
1667 struct nlmsghdr n;
1668 struct rtmsg r;
1669 char buf[1024];
1670 } req = {
1671 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1672 .n.nlmsg_flags = NLM_F_REQUEST,
1673 .n.nlmsg_type = RTM_GETROUTE,
1674 .r.rtm_family = preferred_family,
1675 };
1676 char *idev = NULL;
1677 char *odev = NULL;
1678 int connected = 0;
1679 int fib_match = 0;
1680 int from_ok = 0;
1681 unsigned int mark = 0;
1682
1683 iproute_reset_filter(0);
1684 filter.cloned = 2;
1685
1686 while (argc > 0) {
1687 if (strcmp(*argv, "tos") == 0 ||
1688 matches(*argv, "dsfield") == 0) {
1689 __u32 tos;
1690
1691 NEXT_ARG();
1692 if (rtnl_dsfield_a2n(&tos, *argv))
1693 invarg("TOS value is invalid\n", *argv);
1694 req.r.rtm_tos = tos;
1695 } else if (matches(*argv, "from") == 0) {
1696 inet_prefix addr;
1697
1698 NEXT_ARG();
1699 if (matches(*argv, "help") == 0)
1700 usage();
1701 from_ok = 1;
1702 get_prefix(&addr, *argv, req.r.rtm_family);
1703 if (req.r.rtm_family == AF_UNSPEC)
1704 req.r.rtm_family = addr.family;
1705 if (addr.bytelen)
1706 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1707 req.r.rtm_src_len = addr.bitlen;
1708 } else if (matches(*argv, "iif") == 0) {
1709 NEXT_ARG();
1710 idev = *argv;
1711 } else if (matches(*argv, "mark") == 0) {
1712 NEXT_ARG();
1713 get_unsigned(&mark, *argv, 0);
1714 } else if (matches(*argv, "oif") == 0 ||
1715 strcmp(*argv, "dev") == 0) {
1716 NEXT_ARG();
1717 odev = *argv;
1718 } else if (matches(*argv, "notify") == 0) {
1719 req.r.rtm_flags |= RTM_F_NOTIFY;
1720 } else if (matches(*argv, "connected") == 0) {
1721 connected = 1;
1722 } else if (matches(*argv, "vrf") == 0) {
1723 NEXT_ARG();
1724 if (!name_is_vrf(*argv))
1725 invarg("Invalid VRF\n", *argv);
1726 odev = *argv;
1727 } else if (matches(*argv, "uid") == 0) {
1728 uid_t uid;
1729
1730 NEXT_ARG();
1731 if (get_unsigned(&uid, *argv, 0))
1732 invarg("invalid UID\n", *argv);
1733 addattr32(&req.n, sizeof(req), RTA_UID, uid);
1734 } else if (matches(*argv, "fibmatch") == 0) {
1735 fib_match = 1;
1736 } else if (strcmp(*argv, "as") == 0) {
1737 inet_prefix addr;
1738
1739 NEXT_ARG();
1740 if (strcmp(*argv, "to") == 0)
1741 NEXT_ARG();
1742 get_addr(&addr, *argv, req.r.rtm_family);
1743 if (req.r.rtm_family == AF_UNSPEC)
1744 req.r.rtm_family = addr.family;
1745 addattr_l(&req.n, sizeof(req), RTA_NEWDST, &addr.data, addr.bytelen);
1746 } else {
1747 inet_prefix addr;
1748
1749 if (strcmp(*argv, "to") == 0) {
1750 NEXT_ARG();
1751 }
1752 if (matches(*argv, "help") == 0)
1753 usage();
1754 get_prefix(&addr, *argv, req.r.rtm_family);
1755 if (req.r.rtm_family == AF_UNSPEC)
1756 req.r.rtm_family = addr.family;
1757 if (addr.bytelen)
1758 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1759 req.r.rtm_dst_len = addr.bitlen;
1760 }
1761 argc--; argv++;
1762 }
1763
1764 if (req.r.rtm_dst_len == 0) {
1765 fprintf(stderr, "need at least a destination address\n");
1766 return -1;
1767 }
1768
1769 if (idev || odev) {
1770 int idx;
1771
1772 if (idev) {
1773 if ((idx = ll_name_to_index(idev)) == 0) {
1774 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1775 return -1;
1776 }
1777 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1778 }
1779 if (odev) {
1780 if ((idx = ll_name_to_index(odev)) == 0) {
1781 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1782 return -1;
1783 }
1784 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1785 }
1786 }
1787 if (mark)
1788 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
1789
1790 if (req.r.rtm_family == AF_UNSPEC)
1791 req.r.rtm_family = AF_INET;
1792
1793 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
1794 if (fib_match)
1795 req.r.rtm_flags |= RTM_F_FIB_MATCH;
1796
1797 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
1798 return -2;
1799
1800 if (connected && !from_ok) {
1801 struct rtmsg *r = NLMSG_DATA(&req.n);
1802 int len = req.n.nlmsg_len;
1803 struct rtattr *tb[RTA_MAX+1];
1804
1805 if (print_route(NULL, &req.n, (void *)stdout) < 0) {
1806 fprintf(stderr, "An error :-)\n");
1807 return -1;
1808 }
1809
1810 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1811 fprintf(stderr, "Not a route?\n");
1812 return -1;
1813 }
1814 len -= NLMSG_LENGTH(sizeof(*r));
1815 if (len < 0) {
1816 fprintf(stderr, "Wrong len %d\n", len);
1817 return -1;
1818 }
1819
1820 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1821
1822 if (tb[RTA_PREFSRC]) {
1823 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1824 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1825 } else if (!tb[RTA_SRC]) {
1826 fprintf(stderr, "Failed to connect the route\n");
1827 return -1;
1828 }
1829 if (!odev && tb[RTA_OIF])
1830 tb[RTA_OIF]->rta_type = 0;
1831 if (tb[RTA_GATEWAY])
1832 tb[RTA_GATEWAY]->rta_type = 0;
1833 if (tb[RTA_VIA])
1834 tb[RTA_VIA]->rta_type = 0;
1835 if (!idev && tb[RTA_IIF])
1836 tb[RTA_IIF]->rta_type = 0;
1837 req.n.nlmsg_flags = NLM_F_REQUEST;
1838 req.n.nlmsg_type = RTM_GETROUTE;
1839
1840 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
1841 return -2;
1842 }
1843
1844 if (print_route(NULL, &req.n, (void *)stdout) < 0) {
1845 fprintf(stderr, "An error :-)\n");
1846 return -1;
1847 }
1848
1849 return 0;
1850 }
1851
1852 static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
1853 {
1854 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
1855 return 1;
1856
1857 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
1858 }
1859
1860 static int restore_handler(const struct sockaddr_nl *nl,
1861 struct rtnl_ctrl_data *ctrl,
1862 struct nlmsghdr *n, void *arg)
1863 {
1864 struct rtmsg *r = NLMSG_DATA(n);
1865 struct rtattr *tb[RTA_MAX+1];
1866 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
1867 int ret, prio = *(int *)arg;
1868
1869 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1870
1871 /* Restore routes in correct order:
1872 * 0. ones for local addresses,
1873 * 1. ones for local networks,
1874 * 2. others (remote networks/hosts).
1875 */
1876 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
1877 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
1878 goto restore;
1879 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
1880 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
1881 goto restore;
1882 else if (prio == 2 && tb[RTA_GATEWAY])
1883 goto restore;
1884
1885 return 0;
1886
1887 restore:
1888 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
1889
1890 ll_init_map(&rth);
1891
1892 ret = rtnl_talk(&rth, n, n, sizeof(*n));
1893 if ((ret < 0) && (errno == EEXIST))
1894 ret = 0;
1895
1896 return ret;
1897 }
1898
1899 static int route_dump_check_magic(void)
1900 {
1901 int ret;
1902 __u32 magic = 0;
1903
1904 if (isatty(STDIN_FILENO)) {
1905 fprintf(stderr, "Can't restore route dump from a terminal\n");
1906 return -1;
1907 }
1908
1909 ret = fread(&magic, sizeof(magic), 1, stdin);
1910 if (magic != route_dump_magic) {
1911 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
1912 return -1;
1913 }
1914
1915 return 0;
1916 }
1917
1918 static int iproute_restore(void)
1919 {
1920 int pos, prio;
1921
1922 if (route_dump_check_magic())
1923 return -1;
1924
1925 pos = ftell(stdin);
1926 if (pos == -1) {
1927 perror("Failed to restore: ftell");
1928 return -1;
1929 }
1930
1931 for (prio = 0; prio < 3; prio++) {
1932 int err;
1933
1934 err = rtnl_from_file(stdin, &restore_handler, &prio);
1935 if (err)
1936 return -2;
1937
1938 if (fseek(stdin, pos, SEEK_SET) == -1) {
1939 perror("Failed to restore: fseek");
1940 return -1;
1941 }
1942 }
1943
1944 return 0;
1945 }
1946
1947 static int show_handler(const struct sockaddr_nl *nl,
1948 struct rtnl_ctrl_data *ctrl,
1949 struct nlmsghdr *n, void *arg)
1950 {
1951 print_route(nl, n, stdout);
1952 return 0;
1953 }
1954
1955 static int iproute_showdump(void)
1956 {
1957 if (route_dump_check_magic())
1958 return -1;
1959
1960 if (rtnl_from_file(stdin, &show_handler, NULL))
1961 return -2;
1962
1963 return 0;
1964 }
1965
1966 void iproute_reset_filter(int ifindex)
1967 {
1968 memset(&filter, 0, sizeof(filter));
1969 filter.mdst.bitlen = -1;
1970 filter.msrc.bitlen = -1;
1971 filter.oif = ifindex;
1972 if (filter.oif > 0)
1973 filter.oifmask = -1;
1974 }
1975
1976 int do_iproute(int argc, char **argv)
1977 {
1978 if (argc < 1)
1979 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
1980
1981 if (matches(*argv, "add") == 0)
1982 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1983 argc-1, argv+1);
1984 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1985 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1986 argc-1, argv+1);
1987 if (matches(*argv, "replace") == 0)
1988 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1989 argc-1, argv+1);
1990 if (matches(*argv, "prepend") == 0)
1991 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1992 argc-1, argv+1);
1993 if (matches(*argv, "append") == 0)
1994 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
1995 argc-1, argv+1);
1996 if (matches(*argv, "test") == 0)
1997 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
1998 argc-1, argv+1);
1999 if (matches(*argv, "delete") == 0)
2000 return iproute_modify(RTM_DELROUTE, 0,
2001 argc-1, argv+1);
2002 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2003 || matches(*argv, "lst") == 0)
2004 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
2005 if (matches(*argv, "get") == 0)
2006 return iproute_get(argc-1, argv+1);
2007 if (matches(*argv, "flush") == 0)
2008 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2009 if (matches(*argv, "save") == 0)
2010 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2011 if (matches(*argv, "restore") == 0)
2012 return iproute_restore();
2013 if (matches(*argv, "showdump") == 0)
2014 return iproute_showdump();
2015 if (matches(*argv, "help") == 0)
2016 usage();
2017 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
2018 exit(-1);
2019 }
Upstream mirror of iproute2