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Merge branch 'route_print_refactor' into iproute2-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 <fcntl.h>
17 #include <string.h>
18 #include <time.h>
19 #include <sys/time.h>
20 #include <sys/socket.h>
21 #include <netinet/in.h>
22 #include <netinet/ip.h>
23 #include <arpa/inet.h>
24 #include <linux/in_route.h>
25 #include <linux/icmpv6.h>
26 #include <errno.h>
27
28 #include "rt_names.h"
29 #include "utils.h"
30 #include "ip_common.h"
31
32 #ifndef RTAX_RTTVAR
33 #define RTAX_RTTVAR RTAX_HOPS
34 #endif
35
36 enum list_action {
37 IPROUTE_LIST,
38 IPROUTE_FLUSH,
39 IPROUTE_SAVE,
40 };
41 static const char *mx_names[RTAX_MAX+1] = {
42 [RTAX_MTU] = "mtu",
43 [RTAX_WINDOW] = "window",
44 [RTAX_RTT] = "rtt",
45 [RTAX_RTTVAR] = "rttvar",
46 [RTAX_SSTHRESH] = "ssthresh",
47 [RTAX_CWND] = "cwnd",
48 [RTAX_ADVMSS] = "advmss",
49 [RTAX_REORDERING] = "reordering",
50 [RTAX_HOPLIMIT] = "hoplimit",
51 [RTAX_INITCWND] = "initcwnd",
52 [RTAX_FEATURES] = "features",
53 [RTAX_RTO_MIN] = "rto_min",
54 [RTAX_INITRWND] = "initrwnd",
55 [RTAX_QUICKACK] = "quickack",
56 [RTAX_CC_ALGO] = "congctl",
57 [RTAX_FASTOPEN_NO_COOKIE] = "fastopen_no_cookie"
58 };
59 static void usage(void) __attribute__((noreturn));
60
61 static void usage(void)
62 {
63 fprintf(stderr,
64 "Usage: ip route { list | flush } SELECTOR\n"
65 " ip route save SELECTOR\n"
66 " ip route restore\n"
67 " ip route showdump\n"
68 " ip route get [ ROUTE_GET_FLAGS ] ADDRESS\n"
69 " [ from ADDRESS iif STRING ]\n"
70 " [ oif STRING ] [ tos TOS ]\n"
71 " [ mark NUMBER ] [ vrf NAME ]\n"
72 " [ uid NUMBER ]\n"
73 " ip route { add | del | change | append | replace } ROUTE\n"
74 "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"
75 " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n"
76 " [ type TYPE ] [ scope SCOPE ]\n"
77 "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"
78 "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"
79 " [ table TABLE_ID ] [ proto RTPROTO ]\n"
80 " [ scope SCOPE ] [ metric METRIC ]\n"
81 " [ ttl-propagate { enabled | disabled } ]\n"
82 "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n"
83 "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n"
84 " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"
85 "FAMILY := [ inet | inet6 | ipx | dnet | mpls | bridge | link ]\n"
86 "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n"
87 " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n"
88 " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"
89 " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"
90 " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n"
91 " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n"
92 " [ pref PREF ] [ expires TIME ] [ fastopen_no_cookie BOOL ]\n"
93 "TYPE := { unicast | local | broadcast | multicast | throw |\n"
94 " unreachable | prohibit | blackhole | nat }\n"
95 "TABLE_ID := [ local | main | default | all | NUMBER ]\n"
96 "SCOPE := [ host | link | global | NUMBER ]\n"
97 "NHFLAGS := [ onlink | pervasive ]\n"
98 "RTPROTO := [ kernel | boot | static | NUMBER ]\n"
99 "PREF := [ low | medium | high ]\n"
100 "TIME := NUMBER[s|ms]\n"
101 "BOOL := [1|0]\n"
102 "FEATURES := ecn\n"
103 "ENCAPTYPE := [ mpls | ip | ip6 | seg6 | seg6local ]\n"
104 "ENCAPHDR := [ MPLSLABEL | SEG6HDR ]\n"
105 "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n"
106 "SEGMODE := [ encap | inline ]\n"
107 "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 __u32 metric, metricmask;
129 inet_prefix rprefsrc;
130 inet_prefix rvia;
131 inet_prefix rdst;
132 inet_prefix mdst;
133 inet_prefix rsrc;
134 inet_prefix msrc;
135 } filter;
136
137 static int flush_update(void)
138 {
139 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
140 perror("Failed to send flush request");
141 return -2;
142 }
143 filter.flushp = 0;
144 return 0;
145 }
146
147 static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
148 {
149 struct rtmsg *r = NLMSG_DATA(n);
150 inet_prefix dst = { .family = r->rtm_family };
151 inet_prefix src = { .family = r->rtm_family };
152 inet_prefix via = { .family = r->rtm_family };
153 inet_prefix prefsrc = { .family = r->rtm_family };
154 __u32 table;
155 static int ip6_multiple_tables;
156
157 table = rtm_get_table(r, tb);
158
159 if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
160 return 0;
161
162 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
163 ip6_multiple_tables = 1;
164
165 if (filter.cloned == !(r->rtm_flags&RTM_F_CLONED))
166 return 0;
167
168 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
169 if (filter.tb) {
170 if (filter.tb == RT_TABLE_LOCAL) {
171 if (r->rtm_type != RTN_LOCAL)
172 return 0;
173 } else if (filter.tb == RT_TABLE_MAIN) {
174 if (r->rtm_type == RTN_LOCAL)
175 return 0;
176 } else {
177 return 0;
178 }
179 }
180 } else {
181 if (filter.tb > 0 && filter.tb != table)
182 return 0;
183 }
184 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
185 return 0;
186 if ((filter.scope^r->rtm_scope)&filter.scopemask)
187 return 0;
188
189 if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
190 return 0;
191 if ((filter.tos^r->rtm_tos)&filter.tosmask)
192 return 0;
193 if (filter.rdst.family) {
194 if (r->rtm_family != filter.rdst.family ||
195 filter.rdst.bitlen > r->rtm_dst_len)
196 return 0;
197 } else if (filter.rdst.flags & PREFIXLEN_SPECIFIED) {
198 if (filter.rdst.bitlen > r->rtm_dst_len)
199 return 0;
200 }
201 if (filter.mdst.family) {
202 if (r->rtm_family != filter.mdst.family ||
203 (filter.mdst.bitlen >= 0 &&
204 filter.mdst.bitlen < r->rtm_dst_len))
205 return 0;
206 } else if (filter.mdst.flags & PREFIXLEN_SPECIFIED) {
207 if (filter.mdst.bitlen >= 0 &&
208 filter.mdst.bitlen < r->rtm_dst_len)
209 return 0;
210 }
211 if (filter.rsrc.family) {
212 if (r->rtm_family != filter.rsrc.family ||
213 filter.rsrc.bitlen > r->rtm_src_len)
214 return 0;
215 } else if (filter.rsrc.flags & PREFIXLEN_SPECIFIED) {
216 if (filter.rsrc.bitlen > r->rtm_src_len)
217 return 0;
218 }
219 if (filter.msrc.family) {
220 if (r->rtm_family != filter.msrc.family ||
221 (filter.msrc.bitlen >= 0 &&
222 filter.msrc.bitlen < r->rtm_src_len))
223 return 0;
224 } else if (filter.msrc.flags & PREFIXLEN_SPECIFIED) {
225 if (filter.msrc.bitlen >= 0 &&
226 filter.msrc.bitlen < r->rtm_src_len)
227 return 0;
228 }
229 if (filter.rvia.family) {
230 int family = r->rtm_family;
231
232 if (tb[RTA_VIA]) {
233 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
234
235 family = via->rtvia_family;
236 }
237 if (family != filter.rvia.family)
238 return 0;
239 }
240 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
241 return 0;
242
243 if (tb[RTA_DST])
244 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
245 if (filter.rsrc.family || filter.msrc.family ||
246 filter.rsrc.flags & PREFIXLEN_SPECIFIED ||
247 filter.msrc.flags & PREFIXLEN_SPECIFIED) {
248 if (tb[RTA_SRC])
249 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
250 }
251 if (filter.rvia.bitlen > 0) {
252 if (tb[RTA_GATEWAY])
253 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
254 if (tb[RTA_VIA]) {
255 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
256 struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
257
258 via.family = rtvia->rtvia_family;
259 memcpy(&via.data, rtvia->rtvia_addr, len);
260 }
261 }
262 if (filter.rprefsrc.bitlen > 0) {
263 if (tb[RTA_PREFSRC])
264 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
265 }
266
267 if ((filter.rdst.family || filter.rdst.flags & PREFIXLEN_SPECIFIED) &&
268 inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
269 return 0;
270 if ((filter.mdst.family || filter.mdst.flags & PREFIXLEN_SPECIFIED) &&
271 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
272 return 0;
273
274 if ((filter.rsrc.family || filter.rsrc.flags & PREFIXLEN_SPECIFIED) &&
275 inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
276 return 0;
277 if ((filter.msrc.family || filter.msrc.flags & PREFIXLEN_SPECIFIED) &&
278 filter.msrc.bitlen >= 0 &&
279 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
280 return 0;
281
282 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
283 return 0;
284 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
285 return 0;
286 if (filter.realmmask) {
287 __u32 realms = 0;
288
289 if (tb[RTA_FLOW])
290 realms = rta_getattr_u32(tb[RTA_FLOW]);
291 if ((realms^filter.realm)&filter.realmmask)
292 return 0;
293 }
294 if (filter.iifmask) {
295 int iif = 0;
296
297 if (tb[RTA_IIF])
298 iif = rta_getattr_u32(tb[RTA_IIF]);
299 if ((iif^filter.iif)&filter.iifmask)
300 return 0;
301 }
302 if (filter.oifmask) {
303 int oif = 0;
304
305 if (tb[RTA_OIF])
306 oif = rta_getattr_u32(tb[RTA_OIF]);
307 if ((oif^filter.oif)&filter.oifmask)
308 return 0;
309 }
310 if (filter.markmask) {
311 int mark = 0;
312
313 if (tb[RTA_MARK])
314 mark = rta_getattr_u32(tb[RTA_MARK]);
315 if ((mark ^ filter.mark) & filter.markmask)
316 return 0;
317 }
318 if (filter.metricmask) {
319 __u32 metric = 0;
320
321 if (tb[RTA_PRIORITY])
322 metric = rta_getattr_u32(tb[RTA_PRIORITY]);
323 if ((metric ^ filter.metric) & filter.metricmask)
324 return 0;
325 }
326 if (filter.flushb &&
327 r->rtm_family == AF_INET6 &&
328 r->rtm_dst_len == 0 &&
329 r->rtm_type == RTN_UNREACHABLE &&
330 tb[RTA_PRIORITY] &&
331 rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
332 return 0;
333
334 return 1;
335 }
336
337 static void print_rtax_features(FILE *fp, unsigned int features)
338 {
339 unsigned int of = features;
340
341 if (features & RTAX_FEATURE_ECN) {
342 fprintf(fp, "ecn ");
343 features &= ~RTAX_FEATURE_ECN;
344 }
345
346 if (features)
347 fprintf(fp, "0x%x ", of);
348 }
349
350 static void print_rt_flags(FILE *fp, unsigned int flags)
351 {
352 if (flags & RTNH_F_DEAD)
353 fprintf(fp, "dead ");
354 if (flags & RTNH_F_ONLINK)
355 fprintf(fp, "onlink ");
356 if (flags & RTNH_F_PERVASIVE)
357 fprintf(fp, "pervasive ");
358 if (flags & RTNH_F_OFFLOAD)
359 fprintf(fp, "offload ");
360 if (flags & RTNH_F_LINKDOWN)
361 fprintf(fp, "linkdown ");
362 if (flags & RTNH_F_UNRESOLVED)
363 fprintf(fp, "unresolved ");
364 }
365
366 static void print_rt_pref(FILE *fp, unsigned int pref)
367 {
368 fprintf(fp, "pref ");
369
370 switch (pref) {
371 case ICMPV6_ROUTER_PREF_LOW:
372 fprintf(fp, "low");
373 break;
374 case ICMPV6_ROUTER_PREF_MEDIUM:
375 fprintf(fp, "medium");
376 break;
377 case ICMPV6_ROUTER_PREF_HIGH:
378 fprintf(fp, "high");
379 break;
380 default:
381 fprintf(fp, "%u", pref);
382 }
383 }
384
385 static void print_rta_if(FILE *fp, const struct rtattr *rta,
386 const char *prefix)
387 {
388 const char *ifname = ll_index_to_name(rta_getattr_u32(rta));
389
390 fprintf(fp, "%s %s ", prefix, ifname);
391 }
392
393 static void print_cache_flags(FILE *fp, __u32 flags)
394 {
395 flags &= ~0xFFFF;
396
397 fprintf(fp, "%s cache ", _SL_);
398
399 if (flags == 0)
400 return;
401
402 putc('<', fp);
403
404 #define PRTFL(fl, flname) \
405 if (flags & RTCF_##fl) { \
406 flags &= ~RTCF_##fl; \
407 fprintf(fp, "%s%s", flname, flags ? "," : "> "); \
408 }
409
410 PRTFL(LOCAL, "local");
411 PRTFL(REJECT, "reject");
412 PRTFL(MULTICAST, "mc");
413 PRTFL(BROADCAST, "brd");
414 PRTFL(DNAT, "dst-nat");
415 PRTFL(SNAT, "src-nat");
416 PRTFL(MASQ, "masq");
417 PRTFL(DIRECTDST, "dst-direct");
418 PRTFL(DIRECTSRC, "src-direct");
419 PRTFL(REDIRECTED, "redirected");
420 PRTFL(DOREDIRECT, "redirect");
421 PRTFL(FAST, "fastroute");
422 PRTFL(NOTIFY, "notify");
423 PRTFL(TPROXY, "proxy");
424 #undef PRTFL
425
426 if (flags)
427 fprintf(fp, "%#x> ", flags);
428 }
429
430 static void print_rta_cacheinfo(FILE *fp, const struct rta_cacheinfo *ci)
431 {
432 static int hz;
433
434 if (!hz)
435 hz = get_user_hz();
436 if (ci->rta_expires != 0)
437 fprintf(fp, "expires %dsec ", ci->rta_expires/hz);
438 if (ci->rta_error != 0)
439 fprintf(fp, "error %d ", ci->rta_error);
440 if (show_stats) {
441 if (ci->rta_clntref)
442 fprintf(fp, "users %d ", ci->rta_clntref);
443 if (ci->rta_used != 0)
444 fprintf(fp, "used %d ", ci->rta_used);
445 if (ci->rta_lastuse != 0)
446 fprintf(fp, "age %dsec ", ci->rta_lastuse/hz);
447 }
448 if (ci->rta_id)
449 fprintf(fp, "ipid 0x%04x ", ci->rta_id);
450 if (ci->rta_ts || ci->rta_tsage)
451 fprintf(fp, "ts 0x%x tsage %dsec ",
452 ci->rta_ts, ci->rta_tsage);
453 }
454
455 static void print_rta_flow(FILE *fp, const struct rtattr *rta)
456 {
457 __u32 to = rta_getattr_u32(rta);
458 __u32 from = to >> 16;
459 SPRINT_BUF(b1);
460
461 to &= 0xFFFF;
462 fprintf(fp, "realm%s ", from ? "s" : "");
463 if (from) {
464 fprintf(fp, "%s/",
465 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
466 }
467 fprintf(fp, "%s ",
468 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
469 }
470
471 static void print_rta_newdst(FILE *fp, const struct rtmsg *r,
472 const struct rtattr *rta)
473 {
474 const char *newdst = format_host_rta(r->rtm_family, rta);
475
476 fprintf(fp, "as to %s ", newdst);
477 }
478
479 static void print_rta_gateway(FILE *fp, const struct rtmsg *r,
480 const struct rtattr *rta)
481 {
482 const char *gateway = format_host_rta(r->rtm_family, rta);
483
484 fprintf(fp, "via %s ", gateway);
485 }
486
487 static void print_rta_via(FILE *fp, const struct rtattr *rta)
488 {
489 const struct rtvia *via = RTA_DATA(rta);
490 size_t len = RTA_PAYLOAD(rta);
491
492 fprintf(fp, "via %s %s ",
493 family_name(via->rtvia_family),
494 format_host(via->rtvia_family, len, via->rtvia_addr));
495 }
496
497 static void print_rta_metrics(FILE *fp, const struct rtattr *rta)
498 {
499 struct rtattr *mxrta[RTAX_MAX+1];
500 unsigned int mxlock = 0;
501 int i;
502
503 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta));
504
505 if (mxrta[RTAX_LOCK])
506 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
507
508 for (i = 2; i <= RTAX_MAX; i++) {
509 __u32 val = 0U;
510
511 if (mxrta[i] == NULL && !(mxlock & (1 << i)))
512 continue;
513
514 if (mxrta[i] != NULL && i != RTAX_CC_ALGO)
515 val = rta_getattr_u32(mxrta[i]);
516
517 if (i == RTAX_HOPLIMIT && (int)val == -1)
518 continue;
519
520 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
521 fprintf(fp, "%s ", mx_names[i]);
522 else
523 fprintf(fp, "metric %d ", i);
524
525 if (mxlock & (1<<i))
526 fprintf(fp, "lock ");
527
528 switch (i) {
529 case RTAX_FEATURES:
530 print_rtax_features(fp, val);
531 break;
532 default:
533 fprintf(fp, "%u ", val);
534 break;
535
536 case RTAX_RTT:
537 case RTAX_RTTVAR:
538 case RTAX_RTO_MIN:
539 if (i == RTAX_RTT)
540 val /= 8;
541 else if (i == RTAX_RTTVAR)
542 val /= 4;
543
544 if (val >= 1000)
545 fprintf(fp, "%gs ", val/1e3);
546 else
547 fprintf(fp, "%ums ", val);
548 break;
549 case RTAX_CC_ALGO:
550 fprintf(fp, "%s ", rta_getattr_str(mxrta[i]));
551 break;
552 }
553 }
554 }
555
556 static void print_rta_multipath(FILE *fp, const struct rtmsg *r,
557 struct rtattr *rta)
558 {
559 const struct rtnexthop *nh = RTA_DATA(rta);
560 int len = RTA_PAYLOAD(rta);
561 int first = 1;
562
563 while (len > sizeof(*nh)) {
564 struct rtattr *tb[RTA_MAX + 1];
565
566 if (nh->rtnh_len > len)
567 break;
568
569 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
570 if (first) {
571 fprintf(fp, "Oifs: ");
572 first = 0;
573 } else {
574 fprintf(fp, " ");
575 }
576 } else
577 fprintf(fp, "%s\tnexthop ", _SL_);
578
579 if (nh->rtnh_len > sizeof(*nh)) {
580 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh),
581 nh->rtnh_len - sizeof(*nh));
582
583 if (tb[RTA_ENCAP])
584 lwt_print_encap(fp,
585 tb[RTA_ENCAP_TYPE],
586 tb[RTA_ENCAP]);
587 if (tb[RTA_NEWDST])
588 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
589 if (tb[RTA_GATEWAY])
590 print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
591 if (tb[RTA_VIA])
592 print_rta_via(fp, tb[RTA_VIA]);
593 if (tb[RTA_FLOW])
594 print_rta_flow(fp, tb[RTA_FLOW]);
595 }
596
597 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
598 fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
599 if (nh->rtnh_hops != 1)
600 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
601 fprintf(fp, " ");
602 } else {
603 fprintf(fp, "dev %s ",
604 ll_index_to_name(nh->rtnh_ifindex));
605 if (r->rtm_family != AF_MPLS)
606 fprintf(fp, "weight %d ",
607 nh->rtnh_hops+1);
608 }
609
610 print_rt_flags(fp, nh->rtnh_flags);
611
612 len -= NLMSG_ALIGN(nh->rtnh_len);
613 nh = RTNH_NEXT(nh);
614 }
615 }
616
617 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
618 {
619 FILE *fp = (FILE *)arg;
620 struct rtmsg *r = NLMSG_DATA(n);
621 int len = n->nlmsg_len;
622 struct rtattr *tb[RTA_MAX+1];
623 int host_len, family;
624 __u32 table;
625 int ret;
626
627 SPRINT_BUF(b1);
628
629 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
630 fprintf(stderr, "Not a route: %08x %08x %08x\n",
631 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
632 return -1;
633 }
634 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
635 return 0;
636 len -= NLMSG_LENGTH(sizeof(*r));
637 if (len < 0) {
638 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
639 return -1;
640 }
641
642 host_len = af_bit_len(r->rtm_family);
643
644 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
645 table = rtm_get_table(r, tb);
646
647 if (!filter_nlmsg(n, tb, host_len))
648 return 0;
649
650 if (filter.flushb) {
651 struct nlmsghdr *fn;
652
653 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
654 if ((ret = flush_update()) < 0)
655 return ret;
656 }
657 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
658 memcpy(fn, n, n->nlmsg_len);
659 fn->nlmsg_type = RTM_DELROUTE;
660 fn->nlmsg_flags = NLM_F_REQUEST;
661 fn->nlmsg_seq = ++rth.seq;
662 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
663 filter.flushed++;
664 if (show_stats < 2)
665 return 0;
666 }
667
668 if (n->nlmsg_type == RTM_DELROUTE)
669 fprintf(fp, "Deleted ");
670 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
671 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
672 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
673
674 if (tb[RTA_DST]) {
675 family = get_real_family(r->rtm_type, r->rtm_family);
676 if (r->rtm_dst_len != host_len) {
677 fprintf(fp, "%s/%u ",
678 rt_addr_n2a_rta(family, tb[RTA_DST]),
679 r->rtm_dst_len);
680 } else {
681 fprintf(fp, "%s ",
682 format_host_rta(family, tb[RTA_DST]));
683 }
684 } else if (r->rtm_dst_len) {
685 fprintf(fp, "0/%d ", r->rtm_dst_len);
686 } else {
687 fprintf(fp, "default ");
688 }
689 if (tb[RTA_SRC]) {
690 family = get_real_family(r->rtm_type, r->rtm_family);
691 if (r->rtm_src_len != host_len) {
692 fprintf(fp, "from %s/%u ",
693 rt_addr_n2a_rta(family, tb[RTA_SRC]),
694 r->rtm_src_len);
695 } else {
696 fprintf(fp, "from %s ",
697 format_host_rta(family, tb[RTA_SRC]));
698 }
699 } else if (r->rtm_src_len) {
700 fprintf(fp, "from 0/%u ", r->rtm_src_len);
701 }
702
703 if (tb[RTA_NEWDST])
704 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
705
706 if (tb[RTA_ENCAP])
707 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
708
709 if (r->rtm_tos && filter.tosmask != -1) {
710 SPRINT_BUF(b1);
711 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
712 }
713
714 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len)
715 print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
716
717 if (tb[RTA_VIA])
718 print_rta_via(fp, tb[RTA_VIA]);
719
720 if (tb[RTA_OIF] && filter.oifmask != -1)
721 print_rta_if(fp, tb[RTA_OIF], "dev");
722
723 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
724 fprintf(fp, "table %s ", rtnl_rttable_n2a(table, b1, sizeof(b1)));
725 if (!(r->rtm_flags&RTM_F_CLONED)) {
726 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) && filter.protocolmask != -1)
727 fprintf(fp, "proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1)));
728 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) && filter.scopemask != -1)
729 fprintf(fp, "scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1)));
730 }
731 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
732 /* Do not use format_host(). It is our local addr
733 and symbolic name will not be useful.
734 */
735 fprintf(fp, "src %s ",
736 rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]));
737 }
738 if (tb[RTA_PRIORITY] && filter.metricmask != -1)
739 fprintf(fp, "metric %u ", rta_getattr_u32(tb[RTA_PRIORITY]));
740
741 print_rt_flags(fp, r->rtm_flags);
742
743 if (tb[RTA_MARK]) {
744 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
745
746 if (mark) {
747 if (mark >= 16)
748 fprintf(fp, "mark 0x%x ", mark);
749 else
750 fprintf(fp, "mark %u ", mark);
751 }
752 }
753
754 if (tb[RTA_FLOW] && filter.realmmask != ~0U)
755 print_rta_flow(fp, tb[RTA_FLOW]);
756
757 if (tb[RTA_UID])
758 fprintf(fp, "uid %u ", rta_getattr_u32(tb[RTA_UID]));
759
760 if ((r->rtm_flags & RTM_F_CLONED) && r->rtm_family == AF_INET) {
761 print_cache_flags(fp, r->rtm_flags);
762
763 if (tb[RTA_CACHEINFO])
764 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
765
766 } else if (r->rtm_family == AF_INET6) {
767
768 if (r->rtm_flags & RTM_F_CLONED)
769 fprintf(fp, "%s cache ", _SL_);
770
771 if (tb[RTA_CACHEINFO])
772 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
773 }
774
775 if (tb[RTA_METRICS])
776 print_rta_metrics(fp, tb[RTA_METRICS]);
777
778 if (tb[RTA_IIF] && filter.iifmask != -1)
779 print_rta_if(fp, tb[RTA_IIF], "iif");
780
781 if (tb[RTA_MULTIPATH])
782 print_rta_multipath(fp, r, tb[RTA_MULTIPATH]);
783
784 if (tb[RTA_PREF])
785 print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));
786
787 if (tb[RTA_TTL_PROPAGATE]) {
788 fprintf(fp, "ttl-propagate ");
789 if (rta_getattr_u8(tb[RTA_TTL_PROPAGATE]))
790 fprintf(fp, "enabled");
791 else
792 fprintf(fp, "disabled");
793 }
794 fprintf(fp, "\n");
795 fflush(fp);
796 return 0;
797 }
798
799 static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
800 struct rtattr *rta, struct rtnexthop *rtnh,
801 int *argcp, char ***argvp)
802 {
803 int argc = *argcp;
804 char **argv = *argvp;
805
806 while (++argv, --argc > 0) {
807 if (strcmp(*argv, "via") == 0) {
808 inet_prefix addr;
809 int family;
810
811 NEXT_ARG();
812 family = read_family(*argv);
813 if (family == AF_UNSPEC)
814 family = r->rtm_family;
815 else
816 NEXT_ARG();
817 get_addr(&addr, *argv, family);
818 if (r->rtm_family == AF_UNSPEC)
819 r->rtm_family = addr.family;
820 if (addr.family == r->rtm_family) {
821 rta_addattr_l(rta, 4096, RTA_GATEWAY, &addr.data, addr.bytelen);
822 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
823 } else {
824 rta_addattr_l(rta, 4096, RTA_VIA, &addr.family, addr.bytelen+2);
825 rtnh->rtnh_len += RTA_SPACE(addr.bytelen+2);
826 }
827 } else if (strcmp(*argv, "dev") == 0) {
828 NEXT_ARG();
829 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
830 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
831 return -1;
832 }
833 } else if (strcmp(*argv, "weight") == 0) {
834 unsigned int w;
835
836 NEXT_ARG();
837 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
838 invarg("\"weight\" is invalid\n", *argv);
839 rtnh->rtnh_hops = w - 1;
840 } else if (strcmp(*argv, "onlink") == 0) {
841 rtnh->rtnh_flags |= RTNH_F_ONLINK;
842 } else if (matches(*argv, "realms") == 0) {
843 __u32 realm;
844
845 NEXT_ARG();
846 if (get_rt_realms_or_raw(&realm, *argv))
847 invarg("\"realm\" value is invalid\n", *argv);
848 rta_addattr32(rta, 4096, RTA_FLOW, realm);
849 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
850 } else if (strcmp(*argv, "encap") == 0) {
851 int len = rta->rta_len;
852
853 lwt_parse_encap(rta, 4096, &argc, &argv);
854 rtnh->rtnh_len += rta->rta_len - len;
855 } else if (strcmp(*argv, "as") == 0) {
856 inet_prefix addr;
857
858 NEXT_ARG();
859 if (strcmp(*argv, "to") == 0)
860 NEXT_ARG();
861 get_addr(&addr, *argv, r->rtm_family);
862 rta_addattr_l(rta, 4096, RTA_NEWDST, &addr.data,
863 addr.bytelen);
864 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
865 } else
866 break;
867 }
868 *argcp = argc;
869 *argvp = argv;
870 return 0;
871 }
872
873 static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
874 int argc, char **argv)
875 {
876 char buf[1024];
877 struct rtattr *rta = (void *)buf;
878 struct rtnexthop *rtnh;
879
880 rta->rta_type = RTA_MULTIPATH;
881 rta->rta_len = RTA_LENGTH(0);
882 rtnh = RTA_DATA(rta);
883
884 while (argc > 0) {
885 if (strcmp(*argv, "nexthop") != 0) {
886 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
887 exit(-1);
888 }
889 if (argc <= 1) {
890 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
891 exit(-1);
892 }
893 memset(rtnh, 0, sizeof(*rtnh));
894 rtnh->rtnh_len = sizeof(*rtnh);
895 rta->rta_len += rtnh->rtnh_len;
896 parse_one_nh(n, r, rta, rtnh, &argc, &argv);
897 rtnh = RTNH_NEXT(rtnh);
898 }
899
900 if (rta->rta_len > RTA_LENGTH(0))
901 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
902 return 0;
903 }
904
905 static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
906 {
907 struct {
908 struct nlmsghdr n;
909 struct rtmsg r;
910 char buf[1024];
911 } req = {
912 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
913 .n.nlmsg_flags = NLM_F_REQUEST | flags,
914 .n.nlmsg_type = cmd,
915 .r.rtm_family = preferred_family,
916 .r.rtm_table = RT_TABLE_MAIN,
917 .r.rtm_scope = RT_SCOPE_NOWHERE,
918 };
919 char mxbuf[256];
920 struct rtattr *mxrta = (void *)mxbuf;
921 unsigned int mxlock = 0;
922 char *d = NULL;
923 int gw_ok = 0;
924 int dst_ok = 0;
925 int nhs_ok = 0;
926 int scope_ok = 0;
927 int table_ok = 0;
928 int raw = 0;
929 int type_ok = 0;
930
931 if (cmd != RTM_DELROUTE) {
932 req.r.rtm_protocol = RTPROT_BOOT;
933 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
934 req.r.rtm_type = RTN_UNICAST;
935 }
936
937 mxrta->rta_type = RTA_METRICS;
938 mxrta->rta_len = RTA_LENGTH(0);
939
940 while (argc > 0) {
941 if (strcmp(*argv, "src") == 0) {
942 inet_prefix addr;
943
944 NEXT_ARG();
945 get_addr(&addr, *argv, req.r.rtm_family);
946 if (req.r.rtm_family == AF_UNSPEC)
947 req.r.rtm_family = addr.family;
948 addattr_l(&req.n, sizeof(req),
949 RTA_PREFSRC, &addr.data, addr.bytelen);
950 } else if (strcmp(*argv, "as") == 0) {
951 inet_prefix addr;
952
953 NEXT_ARG();
954 if (strcmp(*argv, "to") == 0) {
955 NEXT_ARG();
956 }
957 get_addr(&addr, *argv, req.r.rtm_family);
958 if (req.r.rtm_family == AF_UNSPEC)
959 req.r.rtm_family = addr.family;
960 addattr_l(&req.n, sizeof(req),
961 RTA_NEWDST, &addr.data, addr.bytelen);
962 } else if (strcmp(*argv, "via") == 0) {
963 inet_prefix addr;
964 int family;
965
966 if (gw_ok) {
967 invarg("use nexthop syntax to specify multiple via\n",
968 *argv);
969 }
970 gw_ok = 1;
971 NEXT_ARG();
972 family = read_family(*argv);
973 if (family == AF_UNSPEC)
974 family = req.r.rtm_family;
975 else
976 NEXT_ARG();
977 get_addr(&addr, *argv, family);
978 if (req.r.rtm_family == AF_UNSPEC)
979 req.r.rtm_family = addr.family;
980 if (addr.family == req.r.rtm_family)
981 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
982 &addr.data, addr.bytelen);
983 else
984 addattr_l(&req.n, sizeof(req), RTA_VIA,
985 &addr.family, addr.bytelen+2);
986 } else if (strcmp(*argv, "from") == 0) {
987 inet_prefix addr;
988
989 NEXT_ARG();
990 get_prefix(&addr, *argv, req.r.rtm_family);
991 if (req.r.rtm_family == AF_UNSPEC)
992 req.r.rtm_family = addr.family;
993 if (addr.bytelen)
994 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
995 req.r.rtm_src_len = addr.bitlen;
996 } else if (strcmp(*argv, "tos") == 0 ||
997 matches(*argv, "dsfield") == 0) {
998 __u32 tos;
999
1000 NEXT_ARG();
1001 if (rtnl_dsfield_a2n(&tos, *argv))
1002 invarg("\"tos\" value is invalid\n", *argv);
1003 req.r.rtm_tos = tos;
1004 } else if (strcmp(*argv, "expires") == 0) {
1005 __u32 expires;
1006
1007 NEXT_ARG();
1008 if (get_u32(&expires, *argv, 0))
1009 invarg("\"expires\" value is invalid\n", *argv);
1010 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
1011 } else if (matches(*argv, "metric") == 0 ||
1012 matches(*argv, "priority") == 0 ||
1013 strcmp(*argv, "preference") == 0) {
1014 __u32 metric;
1015
1016 NEXT_ARG();
1017 if (get_u32(&metric, *argv, 0))
1018 invarg("\"metric\" value is invalid\n", *argv);
1019 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
1020 } else if (strcmp(*argv, "scope") == 0) {
1021 __u32 scope = 0;
1022
1023 NEXT_ARG();
1024 if (rtnl_rtscope_a2n(&scope, *argv))
1025 invarg("invalid \"scope\" value\n", *argv);
1026 req.r.rtm_scope = scope;
1027 scope_ok = 1;
1028 } else if (strcmp(*argv, "mtu") == 0) {
1029 unsigned int mtu;
1030
1031 NEXT_ARG();
1032 if (strcmp(*argv, "lock") == 0) {
1033 mxlock |= (1<<RTAX_MTU);
1034 NEXT_ARG();
1035 }
1036 if (get_unsigned(&mtu, *argv, 0))
1037 invarg("\"mtu\" value is invalid\n", *argv);
1038 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
1039 } else if (strcmp(*argv, "hoplimit") == 0) {
1040 unsigned int hoplimit;
1041
1042 NEXT_ARG();
1043 if (strcmp(*argv, "lock") == 0) {
1044 mxlock |= (1<<RTAX_HOPLIMIT);
1045 NEXT_ARG();
1046 }
1047 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
1048 invarg("\"hoplimit\" value is invalid\n", *argv);
1049 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
1050 } else if (strcmp(*argv, "advmss") == 0) {
1051 unsigned int mss;
1052
1053 NEXT_ARG();
1054 if (strcmp(*argv, "lock") == 0) {
1055 mxlock |= (1<<RTAX_ADVMSS);
1056 NEXT_ARG();
1057 }
1058 if (get_unsigned(&mss, *argv, 0))
1059 invarg("\"mss\" value is invalid\n", *argv);
1060 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
1061 } else if (matches(*argv, "reordering") == 0) {
1062 unsigned int reord;
1063
1064 NEXT_ARG();
1065 if (strcmp(*argv, "lock") == 0) {
1066 mxlock |= (1<<RTAX_REORDERING);
1067 NEXT_ARG();
1068 }
1069 if (get_unsigned(&reord, *argv, 0))
1070 invarg("\"reordering\" value is invalid\n", *argv);
1071 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1072 } else if (strcmp(*argv, "rtt") == 0) {
1073 unsigned int rtt;
1074
1075 NEXT_ARG();
1076 if (strcmp(*argv, "lock") == 0) {
1077 mxlock |= (1<<RTAX_RTT);
1078 NEXT_ARG();
1079 }
1080 if (get_time_rtt(&rtt, *argv, &raw))
1081 invarg("\"rtt\" value is invalid\n", *argv);
1082 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1083 (raw) ? rtt : rtt * 8);
1084 } else if (strcmp(*argv, "rto_min") == 0) {
1085 unsigned int rto_min;
1086
1087 NEXT_ARG();
1088 mxlock |= (1<<RTAX_RTO_MIN);
1089 if (get_time_rtt(&rto_min, *argv, &raw))
1090 invarg("\"rto_min\" value is invalid\n",
1091 *argv);
1092 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1093 rto_min);
1094 } else if (matches(*argv, "window") == 0) {
1095 unsigned int win;
1096
1097 NEXT_ARG();
1098 if (strcmp(*argv, "lock") == 0) {
1099 mxlock |= (1<<RTAX_WINDOW);
1100 NEXT_ARG();
1101 }
1102 if (get_unsigned(&win, *argv, 0))
1103 invarg("\"window\" value is invalid\n", *argv);
1104 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1105 } else if (matches(*argv, "cwnd") == 0) {
1106 unsigned int win;
1107
1108 NEXT_ARG();
1109 if (strcmp(*argv, "lock") == 0) {
1110 mxlock |= (1<<RTAX_CWND);
1111 NEXT_ARG();
1112 }
1113 if (get_unsigned(&win, *argv, 0))
1114 invarg("\"cwnd\" value is invalid\n", *argv);
1115 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1116 } else if (matches(*argv, "initcwnd") == 0) {
1117 unsigned int win;
1118
1119 NEXT_ARG();
1120 if (strcmp(*argv, "lock") == 0) {
1121 mxlock |= (1<<RTAX_INITCWND);
1122 NEXT_ARG();
1123 }
1124 if (get_unsigned(&win, *argv, 0))
1125 invarg("\"initcwnd\" value is invalid\n", *argv);
1126 rta_addattr32(mxrta, sizeof(mxbuf),
1127 RTAX_INITCWND, win);
1128 } else if (matches(*argv, "initrwnd") == 0) {
1129 unsigned int win;
1130
1131 NEXT_ARG();
1132 if (strcmp(*argv, "lock") == 0) {
1133 mxlock |= (1<<RTAX_INITRWND);
1134 NEXT_ARG();
1135 }
1136 if (get_unsigned(&win, *argv, 0))
1137 invarg("\"initrwnd\" value is invalid\n", *argv);
1138 rta_addattr32(mxrta, sizeof(mxbuf),
1139 RTAX_INITRWND, win);
1140 } else if (matches(*argv, "features") == 0) {
1141 unsigned int features = 0;
1142
1143 while (argc > 0) {
1144 NEXT_ARG();
1145
1146 if (strcmp(*argv, "ecn") == 0)
1147 features |= RTAX_FEATURE_ECN;
1148 else
1149 invarg("\"features\" value not valid\n", *argv);
1150 break;
1151 }
1152
1153 rta_addattr32(mxrta, sizeof(mxbuf),
1154 RTAX_FEATURES, features);
1155 } else if (matches(*argv, "quickack") == 0) {
1156 unsigned int quickack;
1157
1158 NEXT_ARG();
1159 if (get_unsigned(&quickack, *argv, 0))
1160 invarg("\"quickack\" value is invalid\n", *argv);
1161 if (quickack != 1 && quickack != 0)
1162 invarg("\"quickack\" value should be 0 or 1\n", *argv);
1163 rta_addattr32(mxrta, sizeof(mxbuf),
1164 RTAX_QUICKACK, quickack);
1165 } else if (matches(*argv, "congctl") == 0) {
1166 NEXT_ARG();
1167 if (strcmp(*argv, "lock") == 0) {
1168 mxlock |= 1 << RTAX_CC_ALGO;
1169 NEXT_ARG();
1170 }
1171 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1172 strlen(*argv));
1173 } else if (matches(*argv, "rttvar") == 0) {
1174 unsigned int win;
1175
1176 NEXT_ARG();
1177 if (strcmp(*argv, "lock") == 0) {
1178 mxlock |= (1<<RTAX_RTTVAR);
1179 NEXT_ARG();
1180 }
1181 if (get_time_rtt(&win, *argv, &raw))
1182 invarg("\"rttvar\" value is invalid\n", *argv);
1183 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1184 (raw) ? win : win * 4);
1185 } else if (matches(*argv, "ssthresh") == 0) {
1186 unsigned int win;
1187
1188 NEXT_ARG();
1189 if (strcmp(*argv, "lock") == 0) {
1190 mxlock |= (1<<RTAX_SSTHRESH);
1191 NEXT_ARG();
1192 }
1193 if (get_unsigned(&win, *argv, 0))
1194 invarg("\"ssthresh\" value is invalid\n", *argv);
1195 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1196 } else if (matches(*argv, "realms") == 0) {
1197 __u32 realm;
1198
1199 NEXT_ARG();
1200 if (get_rt_realms_or_raw(&realm, *argv))
1201 invarg("\"realm\" value is invalid\n", *argv);
1202 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1203 } else if (strcmp(*argv, "onlink") == 0) {
1204 req.r.rtm_flags |= RTNH_F_ONLINK;
1205 } else if (strcmp(*argv, "nexthop") == 0) {
1206 nhs_ok = 1;
1207 break;
1208 } else if (matches(*argv, "protocol") == 0) {
1209 __u32 prot;
1210
1211 NEXT_ARG();
1212 if (rtnl_rtprot_a2n(&prot, *argv))
1213 invarg("\"protocol\" value is invalid\n", *argv);
1214 req.r.rtm_protocol = prot;
1215 } else if (matches(*argv, "table") == 0) {
1216 __u32 tid;
1217
1218 NEXT_ARG();
1219 if (rtnl_rttable_a2n(&tid, *argv))
1220 invarg("\"table\" value is invalid\n", *argv);
1221 if (tid < 256)
1222 req.r.rtm_table = tid;
1223 else {
1224 req.r.rtm_table = RT_TABLE_UNSPEC;
1225 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1226 }
1227 table_ok = 1;
1228 } else if (matches(*argv, "vrf") == 0) {
1229 __u32 tid;
1230
1231 NEXT_ARG();
1232 tid = ipvrf_get_table(*argv);
1233 if (tid == 0)
1234 invarg("Invalid VRF\n", *argv);
1235 if (tid < 256)
1236 req.r.rtm_table = tid;
1237 else {
1238 req.r.rtm_table = RT_TABLE_UNSPEC;
1239 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1240 }
1241 table_ok = 1;
1242 } else if (strcmp(*argv, "dev") == 0 ||
1243 strcmp(*argv, "oif") == 0) {
1244 NEXT_ARG();
1245 d = *argv;
1246 } else if (matches(*argv, "pref") == 0) {
1247 __u8 pref;
1248
1249 NEXT_ARG();
1250 if (strcmp(*argv, "low") == 0)
1251 pref = ICMPV6_ROUTER_PREF_LOW;
1252 else if (strcmp(*argv, "medium") == 0)
1253 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1254 else if (strcmp(*argv, "high") == 0)
1255 pref = ICMPV6_ROUTER_PREF_HIGH;
1256 else if (get_u8(&pref, *argv, 0))
1257 invarg("\"pref\" value is invalid\n", *argv);
1258 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1259 } else if (strcmp(*argv, "encap") == 0) {
1260 char buf[1024];
1261 struct rtattr *rta = (void *)buf;
1262
1263 rta->rta_type = RTA_ENCAP;
1264 rta->rta_len = RTA_LENGTH(0);
1265
1266 lwt_parse_encap(rta, sizeof(buf), &argc, &argv);
1267
1268 if (rta->rta_len > RTA_LENGTH(0))
1269 addraw_l(&req.n, 1024
1270 , RTA_DATA(rta), RTA_PAYLOAD(rta));
1271 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1272 __u8 ttl_prop;
1273
1274 NEXT_ARG();
1275 if (matches(*argv, "enabled") == 0)
1276 ttl_prop = 1;
1277 else if (matches(*argv, "disabled") == 0)
1278 ttl_prop = 0;
1279 else
1280 invarg("\"ttl-propagate\" value is invalid\n",
1281 *argv);
1282
1283 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1284 ttl_prop);
1285 } else if (matches(*argv, "fastopen_no_cookie") == 0) {
1286 unsigned int fastopen_no_cookie;
1287
1288 NEXT_ARG();
1289 if (get_unsigned(&fastopen_no_cookie, *argv, 0))
1290 invarg("\"fastopen_no_cookie\" value is invalid\n", *argv);
1291 if (fastopen_no_cookie != 1 && fastopen_no_cookie != 0)
1292 invarg("\"fastopen_no_cookie\" value should be 0 or 1\n", *argv);
1293 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FASTOPEN_NO_COOKIE, fastopen_no_cookie);
1294 } else {
1295 int type;
1296 inet_prefix dst;
1297
1298 if (strcmp(*argv, "to") == 0) {
1299 NEXT_ARG();
1300 }
1301 if ((**argv < '0' || **argv > '9') &&
1302 rtnl_rtntype_a2n(&type, *argv) == 0) {
1303 NEXT_ARG();
1304 req.r.rtm_type = type;
1305 type_ok = 1;
1306 }
1307
1308 if (matches(*argv, "help") == 0)
1309 usage();
1310 if (dst_ok)
1311 duparg2("to", *argv);
1312 get_prefix(&dst, *argv, req.r.rtm_family);
1313 if (req.r.rtm_family == AF_UNSPEC)
1314 req.r.rtm_family = dst.family;
1315 req.r.rtm_dst_len = dst.bitlen;
1316 dst_ok = 1;
1317 if (dst.bytelen)
1318 addattr_l(&req.n, sizeof(req),
1319 RTA_DST, &dst.data, dst.bytelen);
1320 }
1321 argc--; argv++;
1322 }
1323
1324 if (!dst_ok)
1325 usage();
1326
1327 if (d) {
1328 int idx;
1329
1330 if ((idx = ll_name_to_index(d)) == 0) {
1331 fprintf(stderr, "Cannot find device \"%s\"\n", d);
1332 return -1;
1333 }
1334 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1335 }
1336
1337 if (mxrta->rta_len > RTA_LENGTH(0)) {
1338 if (mxlock)
1339 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1340 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1341 }
1342
1343 if (nhs_ok)
1344 parse_nexthops(&req.n, &req.r, argc, argv);
1345
1346 if (req.r.rtm_family == AF_UNSPEC)
1347 req.r.rtm_family = AF_INET;
1348
1349 if (!table_ok) {
1350 if (req.r.rtm_type == RTN_LOCAL ||
1351 req.r.rtm_type == RTN_BROADCAST ||
1352 req.r.rtm_type == RTN_NAT ||
1353 req.r.rtm_type == RTN_ANYCAST)
1354 req.r.rtm_table = RT_TABLE_LOCAL;
1355 }
1356 if (!scope_ok) {
1357 if (req.r.rtm_family == AF_INET6 ||
1358 req.r.rtm_family == AF_MPLS)
1359 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1360 else if (req.r.rtm_type == RTN_LOCAL ||
1361 req.r.rtm_type == RTN_NAT)
1362 req.r.rtm_scope = RT_SCOPE_HOST;
1363 else if (req.r.rtm_type == RTN_BROADCAST ||
1364 req.r.rtm_type == RTN_MULTICAST ||
1365 req.r.rtm_type == RTN_ANYCAST)
1366 req.r.rtm_scope = RT_SCOPE_LINK;
1367 else if (req.r.rtm_type == RTN_UNICAST ||
1368 req.r.rtm_type == RTN_UNSPEC) {
1369 if (cmd == RTM_DELROUTE)
1370 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1371 else if (!gw_ok && !nhs_ok)
1372 req.r.rtm_scope = RT_SCOPE_LINK;
1373 }
1374 }
1375
1376 if (!type_ok && req.r.rtm_family == AF_MPLS)
1377 req.r.rtm_type = RTN_UNICAST;
1378
1379 if (rtnl_talk(&rth, &req.n, NULL) < 0)
1380 return -2;
1381
1382 return 0;
1383 }
1384
1385 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
1386 {
1387 struct {
1388 struct nlmsghdr nlh;
1389 struct rtmsg rtm;
1390 } req = {
1391 .nlh.nlmsg_len = sizeof(req),
1392 .nlh.nlmsg_type = RTM_GETROUTE,
1393 .nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST,
1394 .nlh.nlmsg_seq = rth->dump = ++rth->seq,
1395 .rtm.rtm_family = family,
1396 .rtm.rtm_flags = RTM_F_CLONED,
1397 };
1398 struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
1399
1400 return sendto(rth->fd, (void *)&req, sizeof(req), 0, (struct sockaddr *)&nladdr, sizeof(nladdr));
1401 }
1402
1403 static int iproute_flush_cache(void)
1404 {
1405 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1406
1407 int len;
1408 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1409 char *buffer = "-1";
1410
1411 if (flush_fd < 0) {
1412 fprintf(stderr, "Cannot open \"%s\": %s\n",
1413 ROUTE_FLUSH_PATH, strerror(errno));
1414 return -1;
1415 }
1416
1417 len = strlen(buffer);
1418
1419 if ((write(flush_fd, (void *)buffer, len)) < len) {
1420 fprintf(stderr, "Cannot flush routing cache\n");
1421 close(flush_fd);
1422 return -1;
1423 }
1424 close(flush_fd);
1425 return 0;
1426 }
1427
1428 static __u32 route_dump_magic = 0x45311224;
1429
1430 static int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n,
1431 void *arg)
1432 {
1433 int ret;
1434 int len = n->nlmsg_len;
1435 struct rtmsg *r = NLMSG_DATA(n);
1436 struct rtattr *tb[RTA_MAX+1];
1437 int host_len;
1438
1439 host_len = af_bit_len(r->rtm_family);
1440 len -= NLMSG_LENGTH(sizeof(*r));
1441 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1442
1443 if (!filter_nlmsg(n, tb, host_len))
1444 return 0;
1445
1446 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1447 if ((ret > 0) && (ret != n->nlmsg_len)) {
1448 fprintf(stderr, "Short write while saving nlmsg\n");
1449 ret = -EIO;
1450 }
1451
1452 return ret == n->nlmsg_len ? 0 : ret;
1453 }
1454
1455 static int save_route_prep(void)
1456 {
1457 int ret;
1458
1459 if (isatty(STDOUT_FILENO)) {
1460 fprintf(stderr, "Not sending a binary stream to stdout\n");
1461 return -1;
1462 }
1463
1464 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1465 if (ret != sizeof(route_dump_magic)) {
1466 fprintf(stderr, "Can't write magic to dump file\n");
1467 return -1;
1468 }
1469
1470 return 0;
1471 }
1472
1473 static int iproute_list_flush_or_save(int argc, char **argv, int action)
1474 {
1475 int do_ipv6 = preferred_family;
1476 char *id = NULL;
1477 char *od = NULL;
1478 unsigned int mark = 0;
1479 rtnl_filter_t filter_fn;
1480 int ret;
1481
1482 if (action == IPROUTE_SAVE) {
1483 if (save_route_prep())
1484 return -1;
1485
1486 filter_fn = save_route;
1487 } else
1488 filter_fn = print_route;
1489
1490 iproute_reset_filter(0);
1491 filter.tb = RT_TABLE_MAIN;
1492
1493 if ((action == IPROUTE_FLUSH) && argc <= 0) {
1494 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1495 return -1;
1496 }
1497
1498 while (argc > 0) {
1499 if (matches(*argv, "table") == 0) {
1500 __u32 tid;
1501
1502 NEXT_ARG();
1503 if (rtnl_rttable_a2n(&tid, *argv)) {
1504 if (strcmp(*argv, "all") == 0) {
1505 filter.tb = 0;
1506 } else if (strcmp(*argv, "cache") == 0) {
1507 filter.cloned = 1;
1508 } else if (strcmp(*argv, "help") == 0) {
1509 usage();
1510 } else {
1511 invarg("table id value is invalid\n", *argv);
1512 }
1513 } else
1514 filter.tb = tid;
1515 } else if (matches(*argv, "vrf") == 0) {
1516 __u32 tid;
1517
1518 NEXT_ARG();
1519 tid = ipvrf_get_table(*argv);
1520 if (tid == 0)
1521 invarg("Invalid VRF\n", *argv);
1522 filter.tb = tid;
1523 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1524 } else if (matches(*argv, "cached") == 0 ||
1525 matches(*argv, "cloned") == 0) {
1526 filter.cloned = 1;
1527 } else if (strcmp(*argv, "tos") == 0 ||
1528 matches(*argv, "dsfield") == 0) {
1529 __u32 tos;
1530
1531 NEXT_ARG();
1532 if (rtnl_dsfield_a2n(&tos, *argv))
1533 invarg("TOS value is invalid\n", *argv);
1534 filter.tos = tos;
1535 filter.tosmask = -1;
1536 } else if (matches(*argv, "protocol") == 0) {
1537 __u32 prot = 0;
1538
1539 NEXT_ARG();
1540 filter.protocolmask = -1;
1541 if (rtnl_rtprot_a2n(&prot, *argv)) {
1542 if (strcmp(*argv, "all") != 0)
1543 invarg("invalid \"protocol\"\n", *argv);
1544 prot = 0;
1545 filter.protocolmask = 0;
1546 }
1547 filter.protocol = prot;
1548 } else if (matches(*argv, "scope") == 0) {
1549 __u32 scope = 0;
1550
1551 NEXT_ARG();
1552 filter.scopemask = -1;
1553 if (rtnl_rtscope_a2n(&scope, *argv)) {
1554 if (strcmp(*argv, "all") != 0)
1555 invarg("invalid \"scope\"\n", *argv);
1556 scope = RT_SCOPE_NOWHERE;
1557 filter.scopemask = 0;
1558 }
1559 filter.scope = scope;
1560 } else if (matches(*argv, "type") == 0) {
1561 int type;
1562
1563 NEXT_ARG();
1564 if (rtnl_rtntype_a2n(&type, *argv))
1565 invarg("node type value is invalid\n", *argv);
1566 filter.typemask = (1<<type);
1567 } else if (strcmp(*argv, "dev") == 0 ||
1568 strcmp(*argv, "oif") == 0) {
1569 NEXT_ARG();
1570 od = *argv;
1571 } else if (strcmp(*argv, "iif") == 0) {
1572 NEXT_ARG();
1573 id = *argv;
1574 } else if (strcmp(*argv, "mark") == 0) {
1575 NEXT_ARG();
1576 if (get_unsigned(&mark, *argv, 0))
1577 invarg("invalid mark value", *argv);
1578 filter.markmask = -1;
1579 } else if (matches(*argv, "metric") == 0 ||
1580 matches(*argv, "priority") == 0 ||
1581 strcmp(*argv, "preference") == 0) {
1582 __u32 metric;
1583
1584 NEXT_ARG();
1585 if (get_u32(&metric, *argv, 0))
1586 invarg("\"metric\" value is invalid\n", *argv);
1587 filter.metric = metric;
1588 filter.metricmask = -1;
1589 } else if (strcmp(*argv, "via") == 0) {
1590 int family;
1591
1592 NEXT_ARG();
1593 family = read_family(*argv);
1594 if (family == AF_UNSPEC)
1595 family = do_ipv6;
1596 else
1597 NEXT_ARG();
1598 get_prefix(&filter.rvia, *argv, family);
1599 } else if (strcmp(*argv, "src") == 0) {
1600 NEXT_ARG();
1601 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1602 } else if (matches(*argv, "realms") == 0) {
1603 __u32 realm;
1604
1605 NEXT_ARG();
1606 if (get_rt_realms_or_raw(&realm, *argv))
1607 invarg("invalid realms\n", *argv);
1608 filter.realm = realm;
1609 filter.realmmask = ~0U;
1610 if ((filter.realm&0xFFFF) == 0 &&
1611 (*argv)[strlen(*argv) - 1] == '/')
1612 filter.realmmask &= ~0xFFFF;
1613 if ((filter.realm&0xFFFF0000U) == 0 &&
1614 (strchr(*argv, '/') == NULL ||
1615 (*argv)[0] == '/'))
1616 filter.realmmask &= ~0xFFFF0000U;
1617 } else if (matches(*argv, "from") == 0) {
1618 NEXT_ARG();
1619 if (matches(*argv, "root") == 0) {
1620 NEXT_ARG();
1621 get_prefix(&filter.rsrc, *argv, do_ipv6);
1622 } else if (matches(*argv, "match") == 0) {
1623 NEXT_ARG();
1624 get_prefix(&filter.msrc, *argv, do_ipv6);
1625 } else {
1626 if (matches(*argv, "exact") == 0) {
1627 NEXT_ARG();
1628 }
1629 get_prefix(&filter.msrc, *argv, do_ipv6);
1630 filter.rsrc = filter.msrc;
1631 }
1632 } else {
1633 if (matches(*argv, "to") == 0) {
1634 NEXT_ARG();
1635 }
1636 if (matches(*argv, "root") == 0) {
1637 NEXT_ARG();
1638 get_prefix(&filter.rdst, *argv, do_ipv6);
1639 } else if (matches(*argv, "match") == 0) {
1640 NEXT_ARG();
1641 get_prefix(&filter.mdst, *argv, do_ipv6);
1642 } else {
1643 if (matches(*argv, "exact") == 0) {
1644 NEXT_ARG();
1645 }
1646 get_prefix(&filter.mdst, *argv, do_ipv6);
1647 filter.rdst = filter.mdst;
1648 }
1649 }
1650 argc--; argv++;
1651 }
1652
1653 if (do_ipv6 == AF_UNSPEC && filter.tb)
1654 do_ipv6 = AF_INET;
1655
1656 if (id || od) {
1657 int idx;
1658
1659 if (id) {
1660 if ((idx = ll_name_to_index(id)) == 0) {
1661 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1662 return -1;
1663 }
1664 filter.iif = idx;
1665 filter.iifmask = -1;
1666 }
1667 if (od) {
1668 if ((idx = ll_name_to_index(od)) == 0) {
1669 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1670 return -1;
1671 }
1672 filter.oif = idx;
1673 filter.oifmask = -1;
1674 }
1675 }
1676 filter.mark = mark;
1677
1678 if (action == IPROUTE_FLUSH) {
1679 int round = 0;
1680 char flushb[4096-512];
1681 time_t start = time(0);
1682
1683 if (filter.cloned) {
1684 if (do_ipv6 != AF_INET6) {
1685 iproute_flush_cache();
1686 if (show_stats)
1687 printf("*** IPv4 routing cache is flushed.\n");
1688 }
1689 if (do_ipv6 == AF_INET)
1690 return 0;
1691 }
1692
1693 filter.flushb = flushb;
1694 filter.flushp = 0;
1695 filter.flushe = sizeof(flushb);
1696
1697 for (;;) {
1698 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1699 perror("Cannot send dump request");
1700 return -2;
1701 }
1702 filter.flushed = 0;
1703 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1704 fprintf(stderr, "Flush terminated\n");
1705 return -2;
1706 }
1707 if (filter.flushed == 0) {
1708 if (show_stats) {
1709 if (round == 0 && (!filter.cloned || do_ipv6 == AF_INET6))
1710 printf("Nothing to flush.\n");
1711 else
1712 printf("*** Flush is complete after %d round%s ***\n", round, round > 1?"s":"");
1713 }
1714 fflush(stdout);
1715 return 0;
1716 }
1717 round++;
1718 if ((ret = flush_update()) < 0)
1719 return ret;
1720
1721 if (time(0) - start > 30) {
1722 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1723 (long)(time(0) - start), filter.flushed);
1724 return -1;
1725 }
1726
1727 if (show_stats) {
1728 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1729 fflush(stdout);
1730 }
1731 }
1732 }
1733
1734 if (!filter.cloned) {
1735 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1736 perror("Cannot send dump request");
1737 return -2;
1738 }
1739 } else {
1740 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1741 perror("Cannot send dump request");
1742 return -2;
1743 }
1744 }
1745
1746 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1747 fprintf(stderr, "Dump terminated\n");
1748 return -2;
1749 }
1750
1751 return 0;
1752 }
1753
1754
1755 static int iproute_get(int argc, char **argv)
1756 {
1757 struct {
1758 struct nlmsghdr n;
1759 struct rtmsg r;
1760 char buf[1024];
1761 } req = {
1762 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1763 .n.nlmsg_flags = NLM_F_REQUEST,
1764 .n.nlmsg_type = RTM_GETROUTE,
1765 .r.rtm_family = preferred_family,
1766 };
1767 char *idev = NULL;
1768 char *odev = NULL;
1769 struct nlmsghdr *answer;
1770 int connected = 0;
1771 int fib_match = 0;
1772 int from_ok = 0;
1773 unsigned int mark = 0;
1774
1775 iproute_reset_filter(0);
1776 filter.cloned = 2;
1777
1778 while (argc > 0) {
1779 if (strcmp(*argv, "tos") == 0 ||
1780 matches(*argv, "dsfield") == 0) {
1781 __u32 tos;
1782
1783 NEXT_ARG();
1784 if (rtnl_dsfield_a2n(&tos, *argv))
1785 invarg("TOS value is invalid\n", *argv);
1786 req.r.rtm_tos = tos;
1787 } else if (matches(*argv, "from") == 0) {
1788 inet_prefix addr;
1789
1790 NEXT_ARG();
1791 if (matches(*argv, "help") == 0)
1792 usage();
1793 from_ok = 1;
1794 get_prefix(&addr, *argv, req.r.rtm_family);
1795 if (req.r.rtm_family == AF_UNSPEC)
1796 req.r.rtm_family = addr.family;
1797 if (addr.bytelen)
1798 addattr_l(&req.n, sizeof(req), RTA_SRC,
1799 &addr.data, addr.bytelen);
1800 req.r.rtm_src_len = addr.bitlen;
1801 } else if (matches(*argv, "iif") == 0) {
1802 NEXT_ARG();
1803 idev = *argv;
1804 } else if (matches(*argv, "mark") == 0) {
1805 NEXT_ARG();
1806 if (get_unsigned(&mark, *argv, 0))
1807 invarg("invalid mark value", *argv);
1808 } else if (matches(*argv, "oif") == 0 ||
1809 strcmp(*argv, "dev") == 0) {
1810 NEXT_ARG();
1811 odev = *argv;
1812 } else if (matches(*argv, "notify") == 0) {
1813 req.r.rtm_flags |= RTM_F_NOTIFY;
1814 } else if (matches(*argv, "connected") == 0) {
1815 connected = 1;
1816 } else if (matches(*argv, "vrf") == 0) {
1817 NEXT_ARG();
1818 if (!name_is_vrf(*argv))
1819 invarg("Invalid VRF\n", *argv);
1820 odev = *argv;
1821 } else if (matches(*argv, "uid") == 0) {
1822 uid_t uid;
1823
1824 NEXT_ARG();
1825 if (get_unsigned(&uid, *argv, 0))
1826 invarg("invalid UID\n", *argv);
1827 addattr32(&req.n, sizeof(req), RTA_UID, uid);
1828 } else if (matches(*argv, "fibmatch") == 0) {
1829 fib_match = 1;
1830 } else if (strcmp(*argv, "as") == 0) {
1831 inet_prefix addr;
1832
1833 NEXT_ARG();
1834 if (strcmp(*argv, "to") == 0)
1835 NEXT_ARG();
1836 get_addr(&addr, *argv, req.r.rtm_family);
1837 if (req.r.rtm_family == AF_UNSPEC)
1838 req.r.rtm_family = addr.family;
1839 addattr_l(&req.n, sizeof(req), RTA_NEWDST,
1840 &addr.data, addr.bytelen);
1841 } else {
1842 inet_prefix addr;
1843
1844 if (strcmp(*argv, "to") == 0) {
1845 NEXT_ARG();
1846 }
1847 if (matches(*argv, "help") == 0)
1848 usage();
1849 get_prefix(&addr, *argv, req.r.rtm_family);
1850 if (req.r.rtm_family == AF_UNSPEC)
1851 req.r.rtm_family = addr.family;
1852 if (addr.bytelen)
1853 addattr_l(&req.n, sizeof(req),
1854 RTA_DST, &addr.data, addr.bytelen);
1855 req.r.rtm_dst_len = addr.bitlen;
1856 }
1857 argc--; argv++;
1858 }
1859
1860 if (req.r.rtm_dst_len == 0) {
1861 fprintf(stderr, "need at least a destination address\n");
1862 return -1;
1863 }
1864
1865 if (idev || odev) {
1866 int idx;
1867
1868 if (idev) {
1869 if ((idx = ll_name_to_index(idev)) == 0) {
1870 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1871 return -1;
1872 }
1873 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1874 }
1875 if (odev) {
1876 if ((idx = ll_name_to_index(odev)) == 0) {
1877 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1878 return -1;
1879 }
1880 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1881 }
1882 }
1883 if (mark)
1884 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
1885
1886 if (req.r.rtm_family == AF_UNSPEC)
1887 req.r.rtm_family = AF_INET;
1888
1889 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
1890 if (fib_match)
1891 req.r.rtm_flags |= RTM_F_FIB_MATCH;
1892
1893 if (rtnl_talk(&rth, &req.n, &answer) < 0)
1894 return -2;
1895
1896 if (connected && !from_ok) {
1897 struct rtmsg *r = NLMSG_DATA(answer);
1898 int len = answer->nlmsg_len;
1899 struct rtattr *tb[RTA_MAX+1];
1900
1901 if (print_route(NULL, answer, (void *)stdout) < 0) {
1902 fprintf(stderr, "An error :-)\n");
1903 free(answer);
1904 return -1;
1905 }
1906
1907 if (answer->nlmsg_type != RTM_NEWROUTE) {
1908 fprintf(stderr, "Not a route?\n");
1909 free(answer);
1910 return -1;
1911 }
1912 len -= NLMSG_LENGTH(sizeof(*r));
1913 if (len < 0) {
1914 fprintf(stderr, "Wrong len %d\n", len);
1915 free(answer);
1916 return -1;
1917 }
1918
1919 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1920
1921 if (tb[RTA_PREFSRC]) {
1922 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1923 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1924 } else if (!tb[RTA_SRC]) {
1925 fprintf(stderr, "Failed to connect the route\n");
1926 free(answer);
1927 return -1;
1928 }
1929 if (!odev && tb[RTA_OIF])
1930 tb[RTA_OIF]->rta_type = 0;
1931 if (tb[RTA_GATEWAY])
1932 tb[RTA_GATEWAY]->rta_type = 0;
1933 if (tb[RTA_VIA])
1934 tb[RTA_VIA]->rta_type = 0;
1935 if (!idev && tb[RTA_IIF])
1936 tb[RTA_IIF]->rta_type = 0;
1937 req.n.nlmsg_flags = NLM_F_REQUEST;
1938 req.n.nlmsg_type = RTM_GETROUTE;
1939
1940 free(answer);
1941 if (rtnl_talk(&rth, &req.n, &answer) < 0)
1942 return -2;
1943 }
1944
1945 if (print_route(NULL, answer, (void *)stdout) < 0) {
1946 fprintf(stderr, "An error :-)\n");
1947 free(answer);
1948 return -1;
1949 }
1950
1951 free(answer);
1952 return 0;
1953 }
1954
1955 static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
1956 {
1957 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
1958 return 1;
1959
1960 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
1961 }
1962
1963 static int restore_handler(const struct sockaddr_nl *nl,
1964 struct rtnl_ctrl_data *ctrl,
1965 struct nlmsghdr *n, void *arg)
1966 {
1967 struct rtmsg *r = NLMSG_DATA(n);
1968 struct rtattr *tb[RTA_MAX+1];
1969 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
1970 int ret, prio = *(int *)arg;
1971
1972 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1973
1974 /* Restore routes in correct order:
1975 * 0. ones for local addresses,
1976 * 1. ones for local networks,
1977 * 2. others (remote networks/hosts).
1978 */
1979 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
1980 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
1981 goto restore;
1982 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
1983 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
1984 goto restore;
1985 else if (prio == 2 && tb[RTA_GATEWAY])
1986 goto restore;
1987
1988 return 0;
1989
1990 restore:
1991 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
1992
1993 ll_init_map(&rth);
1994
1995 ret = rtnl_talk(&rth, n, NULL);
1996 if ((ret < 0) && (errno == EEXIST))
1997 ret = 0;
1998
1999 return ret;
2000 }
2001
2002 static int route_dump_check_magic(void)
2003 {
2004 int ret;
2005 __u32 magic = 0;
2006
2007 if (isatty(STDIN_FILENO)) {
2008 fprintf(stderr, "Can't restore route dump from a terminal\n");
2009 return -1;
2010 }
2011
2012 ret = fread(&magic, sizeof(magic), 1, stdin);
2013 if (magic != route_dump_magic) {
2014 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
2015 return -1;
2016 }
2017
2018 return 0;
2019 }
2020
2021 static int iproute_restore(void)
2022 {
2023 int pos, prio;
2024
2025 if (route_dump_check_magic())
2026 return -1;
2027
2028 pos = ftell(stdin);
2029 if (pos == -1) {
2030 perror("Failed to restore: ftell");
2031 return -1;
2032 }
2033
2034 for (prio = 0; prio < 3; prio++) {
2035 int err;
2036
2037 err = rtnl_from_file(stdin, &restore_handler, &prio);
2038 if (err)
2039 return -2;
2040
2041 if (fseek(stdin, pos, SEEK_SET) == -1) {
2042 perror("Failed to restore: fseek");
2043 return -1;
2044 }
2045 }
2046
2047 return 0;
2048 }
2049
2050 static int show_handler(const struct sockaddr_nl *nl,
2051 struct rtnl_ctrl_data *ctrl,
2052 struct nlmsghdr *n, void *arg)
2053 {
2054 print_route(nl, n, stdout);
2055 return 0;
2056 }
2057
2058 static int iproute_showdump(void)
2059 {
2060 if (route_dump_check_magic())
2061 return -1;
2062
2063 if (rtnl_from_file(stdin, &show_handler, NULL))
2064 return -2;
2065
2066 return 0;
2067 }
2068
2069 void iproute_reset_filter(int ifindex)
2070 {
2071 memset(&filter, 0, sizeof(filter));
2072 filter.mdst.bitlen = -1;
2073 filter.msrc.bitlen = -1;
2074 filter.oif = ifindex;
2075 if (filter.oif > 0)
2076 filter.oifmask = -1;
2077 }
2078
2079 int do_iproute(int argc, char **argv)
2080 {
2081 if (argc < 1)
2082 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
2083
2084 if (matches(*argv, "add") == 0)
2085 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
2086 argc-1, argv+1);
2087 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
2088 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
2089 argc-1, argv+1);
2090 if (matches(*argv, "replace") == 0)
2091 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
2092 argc-1, argv+1);
2093 if (matches(*argv, "prepend") == 0)
2094 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
2095 argc-1, argv+1);
2096 if (matches(*argv, "append") == 0)
2097 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
2098 argc-1, argv+1);
2099 if (matches(*argv, "test") == 0)
2100 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
2101 argc-1, argv+1);
2102 if (matches(*argv, "delete") == 0)
2103 return iproute_modify(RTM_DELROUTE, 0,
2104 argc-1, argv+1);
2105 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2106 || matches(*argv, "lst") == 0)
2107 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
2108 if (matches(*argv, "get") == 0)
2109 return iproute_get(argc-1, argv+1);
2110 if (matches(*argv, "flush") == 0)
2111 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2112 if (matches(*argv, "save") == 0)
2113 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2114 if (matches(*argv, "restore") == 0)
2115 return iproute_restore();
2116 if (matches(*argv, "showdump") == 0)
2117 return iproute_showdump();
2118 if (matches(*argv, "help") == 0)
2119 usage();
2120 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
2121 exit(-1);
2122 }
Upstream mirror of iproute2