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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 | seg6local ]\n");
104 fprintf(stderr, "ENCAPHDR := [ MPLSLABEL | SEG6HDR ]\n");
105 fprintf(stderr, "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n");
106 fprintf(stderr, "SEGMODE := [ encap | inline ]\n");
107 fprintf(stderr, "ROUTE_GET_FLAGS := [ fibmatch ]\n");
108 exit(-1);
109 }
110
111
112 static struct
113 {
114 unsigned int tb;
115 int cloned;
116 int flushed;
117 char *flushb;
118 int flushp;
119 int flushe;
120 int protocol, protocolmask;
121 int scope, scopemask;
122 __u64 typemask;
123 int tos, tosmask;
124 int iif, iifmask;
125 int oif, oifmask;
126 int mark, markmask;
127 int realm, realmmask;
128 inet_prefix rprefsrc;
129 inet_prefix rvia;
130 inet_prefix rdst;
131 inet_prefix mdst;
132 inet_prefix rsrc;
133 inet_prefix msrc;
134 } filter;
135
136 static int flush_update(void)
137 {
138 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
139 perror("Failed to send flush request");
140 return -2;
141 }
142 filter.flushp = 0;
143 return 0;
144 }
145
146 static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
147 {
148 struct rtmsg *r = NLMSG_DATA(n);
149 inet_prefix dst = { .family = r->rtm_family };
150 inet_prefix src = { .family = r->rtm_family };
151 inet_prefix via = { .family = r->rtm_family };
152 inet_prefix prefsrc = { .family = r->rtm_family };
153 __u32 table;
154 static int ip6_multiple_tables;
155
156 table = rtm_get_table(r, tb);
157
158 if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
159 return 0;
160
161 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
162 ip6_multiple_tables = 1;
163
164 if (filter.cloned == !(r->rtm_flags&RTM_F_CLONED))
165 return 0;
166
167 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
168 if (filter.tb) {
169 if (filter.tb == RT_TABLE_LOCAL) {
170 if (r->rtm_type != RTN_LOCAL)
171 return 0;
172 } else if (filter.tb == RT_TABLE_MAIN) {
173 if (r->rtm_type == RTN_LOCAL)
174 return 0;
175 } else {
176 return 0;
177 }
178 }
179 } else {
180 if (filter.tb > 0 && filter.tb != table)
181 return 0;
182 }
183 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
184 return 0;
185 if ((filter.scope^r->rtm_scope)&filter.scopemask)
186 return 0;
187
188 if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
189 return 0;
190 if ((filter.tos^r->rtm_tos)&filter.tosmask)
191 return 0;
192 if (filter.rdst.family &&
193 (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len))
194 return 0;
195 if (filter.mdst.family &&
196 (r->rtm_family != filter.mdst.family ||
197 (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len)))
198 return 0;
199 if (filter.rsrc.family &&
200 (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len))
201 return 0;
202 if (filter.msrc.family &&
203 (r->rtm_family != filter.msrc.family ||
204 (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len)))
205 return 0;
206 if (filter.rvia.family) {
207 int family = r->rtm_family;
208
209 if (tb[RTA_VIA]) {
210 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
211
212 family = via->rtvia_family;
213 }
214 if (family != filter.rvia.family)
215 return 0;
216 }
217 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
218 return 0;
219
220 if (tb[RTA_DST])
221 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
222 if (filter.rsrc.family || filter.msrc.family) {
223 if (tb[RTA_SRC])
224 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
225 }
226 if (filter.rvia.bitlen > 0) {
227 if (tb[RTA_GATEWAY])
228 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
229 if (tb[RTA_VIA]) {
230 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
231 struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
232
233 via.family = rtvia->rtvia_family;
234 memcpy(&via.data, rtvia->rtvia_addr, len);
235 }
236 }
237 if (filter.rprefsrc.bitlen > 0) {
238 if (tb[RTA_PREFSRC])
239 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
240 }
241
242 if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
243 return 0;
244 if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
245 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
246 return 0;
247
248 if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
249 return 0;
250 if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
251 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
252 return 0;
253
254 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
255 return 0;
256 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
257 return 0;
258 if (filter.realmmask) {
259 __u32 realms = 0;
260
261 if (tb[RTA_FLOW])
262 realms = rta_getattr_u32(tb[RTA_FLOW]);
263 if ((realms^filter.realm)&filter.realmmask)
264 return 0;
265 }
266 if (filter.iifmask) {
267 int iif = 0;
268
269 if (tb[RTA_IIF])
270 iif = rta_getattr_u32(tb[RTA_IIF]);
271 if ((iif^filter.iif)&filter.iifmask)
272 return 0;
273 }
274 if (filter.oifmask) {
275 int oif = 0;
276
277 if (tb[RTA_OIF])
278 oif = rta_getattr_u32(tb[RTA_OIF]);
279 if ((oif^filter.oif)&filter.oifmask)
280 return 0;
281 }
282 if (filter.markmask) {
283 int mark = 0;
284
285 if (tb[RTA_MARK])
286 mark = rta_getattr_u32(tb[RTA_MARK]);
287 if ((mark ^ filter.mark) & filter.markmask)
288 return 0;
289 }
290 if (filter.flushb &&
291 r->rtm_family == AF_INET6 &&
292 r->rtm_dst_len == 0 &&
293 r->rtm_type == RTN_UNREACHABLE &&
294 tb[RTA_PRIORITY] &&
295 rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
296 return 0;
297
298 return 1;
299 }
300
301 static void print_rtax_features(FILE *fp, unsigned int features)
302 {
303 unsigned int of = features;
304
305 if (features & RTAX_FEATURE_ECN) {
306 fprintf(fp, "ecn ");
307 features &= ~RTAX_FEATURE_ECN;
308 }
309
310 if (features)
311 fprintf(fp, "0x%x ", of);
312 }
313
314 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
315 {
316 FILE *fp = (FILE *)arg;
317 struct rtmsg *r = NLMSG_DATA(n);
318 int len = n->nlmsg_len;
319 struct rtattr *tb[RTA_MAX+1];
320 int host_len, family;
321 __u32 table;
322 int ret;
323
324 SPRINT_BUF(b1);
325 static int hz;
326
327 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
328 fprintf(stderr, "Not a route: %08x %08x %08x\n",
329 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
330 return -1;
331 }
332 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
333 return 0;
334 len -= NLMSG_LENGTH(sizeof(*r));
335 if (len < 0) {
336 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
337 return -1;
338 }
339
340 host_len = af_bit_len(r->rtm_family);
341
342 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
343 table = rtm_get_table(r, tb);
344
345 if (!filter_nlmsg(n, tb, host_len))
346 return 0;
347
348 if (filter.flushb) {
349 struct nlmsghdr *fn;
350
351 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
352 if ((ret = flush_update()) < 0)
353 return ret;
354 }
355 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
356 memcpy(fn, n, n->nlmsg_len);
357 fn->nlmsg_type = RTM_DELROUTE;
358 fn->nlmsg_flags = NLM_F_REQUEST;
359 fn->nlmsg_seq = ++rth.seq;
360 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
361 filter.flushed++;
362 if (show_stats < 2)
363 return 0;
364 }
365
366 if (n->nlmsg_type == RTM_DELROUTE)
367 fprintf(fp, "Deleted ");
368 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
369 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
370 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
371
372 if (tb[RTA_DST]) {
373 family = get_real_family(r->rtm_type, r->rtm_family);
374 if (r->rtm_dst_len != host_len) {
375 fprintf(fp, "%s/%u ",
376 rt_addr_n2a_rta(family, tb[RTA_DST]),
377 r->rtm_dst_len);
378 } else {
379 fprintf(fp, "%s ",
380 format_host_rta(family, tb[RTA_DST]));
381 }
382 } else if (r->rtm_dst_len) {
383 fprintf(fp, "0/%d ", r->rtm_dst_len);
384 } else {
385 fprintf(fp, "default ");
386 }
387 if (tb[RTA_SRC]) {
388 family = get_real_family(r->rtm_type, r->rtm_family);
389 if (r->rtm_src_len != host_len) {
390 fprintf(fp, "from %s/%u ",
391 rt_addr_n2a_rta(family, tb[RTA_SRC]),
392 r->rtm_src_len);
393 } else {
394 fprintf(fp, "from %s ",
395 format_host_rta(family, tb[RTA_SRC]));
396 }
397 } else if (r->rtm_src_len) {
398 fprintf(fp, "from 0/%u ", r->rtm_src_len);
399 }
400 if (tb[RTA_NEWDST]) {
401 fprintf(fp, "as to %s ",
402 format_host_rta(r->rtm_family, tb[RTA_NEWDST]));
403 }
404
405 if (tb[RTA_ENCAP])
406 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
407
408 if (r->rtm_tos && filter.tosmask != -1) {
409 SPRINT_BUF(b1);
410 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
411 }
412
413 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
414 fprintf(fp, "via %s ",
415 format_host_rta(r->rtm_family, tb[RTA_GATEWAY]));
416 }
417 if (tb[RTA_VIA]) {
418 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
419 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
420
421 fprintf(fp, "via %s %s ",
422 family_name(via->rtvia_family),
423 format_host(via->rtvia_family, len, via->rtvia_addr));
424 }
425 if (tb[RTA_OIF] && filter.oifmask != -1)
426 fprintf(fp, "dev %s ", ll_index_to_name(rta_getattr_u32(tb[RTA_OIF])));
427
428 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
429 fprintf(fp, "table %s ", rtnl_rttable_n2a(table, b1, sizeof(b1)));
430 if (!(r->rtm_flags&RTM_F_CLONED)) {
431 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) && filter.protocolmask != -1)
432 fprintf(fp, "proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1)));
433 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) && filter.scopemask != -1)
434 fprintf(fp, "scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1)));
435 }
436 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
437 /* Do not use format_host(). It is our local addr
438 and symbolic name will not be useful.
439 */
440 fprintf(fp, "src %s ",
441 rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]));
442 }
443 if (tb[RTA_PRIORITY])
444 fprintf(fp, "metric %u ", rta_getattr_u32(tb[RTA_PRIORITY]));
445 if (r->rtm_flags & RTNH_F_DEAD)
446 fprintf(fp, "dead ");
447 if (r->rtm_flags & RTNH_F_ONLINK)
448 fprintf(fp, "onlink ");
449 if (r->rtm_flags & RTNH_F_PERVASIVE)
450 fprintf(fp, "pervasive ");
451 if (r->rtm_flags & RTNH_F_OFFLOAD)
452 fprintf(fp, "offload ");
453 if (r->rtm_flags & RTM_F_NOTIFY)
454 fprintf(fp, "notify ");
455 if (r->rtm_flags & RTNH_F_LINKDOWN)
456 fprintf(fp, "linkdown ");
457 if (r->rtm_flags & RTNH_F_UNRESOLVED)
458 fprintf(fp, "unresolved ");
459 if (tb[RTA_MARK]) {
460 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
461
462 if (mark) {
463 if (mark >= 16)
464 fprintf(fp, "mark 0x%x ", mark);
465 else
466 fprintf(fp, "mark %u ", mark);
467 }
468 }
469
470 if (tb[RTA_FLOW] && filter.realmmask != ~0U) {
471 __u32 to = rta_getattr_u32(tb[RTA_FLOW]);
472 __u32 from = to>>16;
473
474 to &= 0xFFFF;
475 fprintf(fp, "realm%s ", from ? "s" : "");
476 if (from) {
477 fprintf(fp, "%s/",
478 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
479 }
480 fprintf(fp, "%s ",
481 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
482 }
483
484 if (tb[RTA_UID])
485 fprintf(fp, "uid %u ", rta_getattr_u32(tb[RTA_UID]));
486
487 if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) {
488 __u32 flags = r->rtm_flags&~0xFFFF;
489 int first = 1;
490
491 fprintf(fp, "%s cache ", _SL_);
492
493 #define PRTFL(fl, flname) if (flags&RTCF_##fl) { \
494 flags &= ~RTCF_##fl; \
495 fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
496 first = 0; }
497 PRTFL(LOCAL, "local");
498 PRTFL(REJECT, "reject");
499 PRTFL(MULTICAST, "mc");
500 PRTFL(BROADCAST, "brd");
501 PRTFL(DNAT, "dst-nat");
502 PRTFL(SNAT, "src-nat");
503 PRTFL(MASQ, "masq");
504 PRTFL(DIRECTDST, "dst-direct");
505 PRTFL(DIRECTSRC, "src-direct");
506 PRTFL(REDIRECTED, "redirected");
507 PRTFL(DOREDIRECT, "redirect");
508 PRTFL(FAST, "fastroute");
509 PRTFL(NOTIFY, "notify");
510 PRTFL(TPROXY, "proxy");
511
512 if (flags)
513 fprintf(fp, "%s%x> ", first ? "<" : "", flags);
514 if (tb[RTA_CACHEINFO]) {
515 struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]);
516
517 if (!hz)
518 hz = get_user_hz();
519 if (ci->rta_expires != 0)
520 fprintf(fp, "expires %dsec ", ci->rta_expires/hz);
521 if (ci->rta_error != 0)
522 fprintf(fp, "error %d ", ci->rta_error);
523 if (show_stats) {
524 if (ci->rta_clntref)
525 fprintf(fp, "users %d ", ci->rta_clntref);
526 if (ci->rta_used != 0)
527 fprintf(fp, "used %d ", ci->rta_used);
528 if (ci->rta_lastuse != 0)
529 fprintf(fp, "age %dsec ", ci->rta_lastuse/hz);
530 }
531 if (ci->rta_id)
532 fprintf(fp, "ipid 0x%04x ", ci->rta_id);
533 if (ci->rta_ts || ci->rta_tsage)
534 fprintf(fp, "ts 0x%x tsage %dsec ",
535 ci->rta_ts, ci->rta_tsage);
536 }
537 } else if (r->rtm_family == AF_INET6) {
538 struct rta_cacheinfo *ci = NULL;
539
540 if (tb[RTA_CACHEINFO])
541 ci = RTA_DATA(tb[RTA_CACHEINFO]);
542 if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
543 if (!hz)
544 hz = get_user_hz();
545 if (r->rtm_flags & RTM_F_CLONED)
546 fprintf(fp, "%s cache ", _SL_);
547 if (ci->rta_expires)
548 fprintf(fp, "expires %dsec ", ci->rta_expires/hz);
549 if (ci->rta_error != 0)
550 fprintf(fp, "error %d ", ci->rta_error);
551 if (show_stats) {
552 if (ci->rta_clntref)
553 fprintf(fp, "users %d ", ci->rta_clntref);
554 if (ci->rta_used != 0)
555 fprintf(fp, "used %d ", ci->rta_used);
556 if (ci->rta_lastuse != 0)
557 fprintf(fp, "age %dsec ", ci->rta_lastuse/hz);
558 }
559 } else if (ci) {
560 if (ci->rta_error != 0)
561 fprintf(fp, "error %d ", ci->rta_error);
562 }
563 }
564 if (tb[RTA_METRICS]) {
565 int i;
566 unsigned int mxlock = 0;
567 struct rtattr *mxrta[RTAX_MAX+1];
568
569 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]),
570 RTA_PAYLOAD(tb[RTA_METRICS]));
571 if (mxrta[RTAX_LOCK])
572 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
573
574 for (i = 2; i <= RTAX_MAX; i++) {
575 __u32 val = 0U;
576
577 if (mxrta[i] == NULL)
578 continue;
579
580 if (i != RTAX_CC_ALGO)
581 val = rta_getattr_u32(mxrta[i]);
582
583 if (i == RTAX_HOPLIMIT && (int)val == -1)
584 continue;
585
586 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
587 fprintf(fp, "%s ", mx_names[i]);
588 else
589 fprintf(fp, "metric %d ", i);
590
591 if (mxlock & (1<<i))
592 fprintf(fp, "lock ");
593
594 switch (i) {
595 case RTAX_FEATURES:
596 print_rtax_features(fp, val);
597 break;
598 default:
599 fprintf(fp, "%u ", val);
600 break;
601
602 case RTAX_RTT:
603 case RTAX_RTTVAR:
604 case RTAX_RTO_MIN:
605 if (i == RTAX_RTT)
606 val /= 8;
607 else if (i == RTAX_RTTVAR)
608 val /= 4;
609
610 if (val >= 1000)
611 fprintf(fp, "%gs ", val/1e3);
612 else
613 fprintf(fp, "%ums ", val);
614 break;
615 case RTAX_CC_ALGO:
616 fprintf(fp, "%s ", rta_getattr_str(mxrta[i]));
617 break;
618 }
619 }
620 }
621 if (tb[RTA_IIF] && filter.iifmask != -1) {
622 fprintf(fp, "iif %s ",
623 ll_index_to_name(rta_getattr_u32(tb[RTA_IIF])));
624 }
625 if (tb[RTA_MULTIPATH]) {
626 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
627 int first = 1;
628
629 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
630
631 for (;;) {
632 if (len < sizeof(*nh))
633 break;
634 if (nh->rtnh_len > len)
635 break;
636 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
637 if (first) {
638 fprintf(fp, "Oifs: ");
639 first = 0;
640 } else {
641 fprintf(fp, " ");
642 }
643 } else
644 fprintf(fp, "%s\tnexthop ", _SL_);
645 if (nh->rtnh_len > sizeof(*nh)) {
646 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh));
647
648 if (tb[RTA_ENCAP])
649 lwt_print_encap(fp,
650 tb[RTA_ENCAP_TYPE],
651 tb[RTA_ENCAP]);
652 if (tb[RTA_NEWDST]) {
653 fprintf(fp, "as to %s ",
654 format_host_rta(r->rtm_family,
655 tb[RTA_NEWDST]));
656 }
657 if (tb[RTA_GATEWAY]) {
658 fprintf(fp, "via %s ",
659 format_host_rta(r->rtm_family,
660 tb[RTA_GATEWAY]));
661 }
662 if (tb[RTA_VIA]) {
663 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
664 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
665
666 fprintf(fp, "via %s %s ",
667 family_name(via->rtvia_family),
668 format_host(via->rtvia_family, len, via->rtvia_addr));
669 }
670 if (tb[RTA_FLOW]) {
671 __u32 to = rta_getattr_u32(tb[RTA_FLOW]);
672 __u32 from = to>>16;
673
674 to &= 0xFFFF;
675 fprintf(fp, "realm%s ", from ? "s" : "");
676 if (from) {
677 fprintf(fp, "%s/",
678 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
679 }
680 fprintf(fp, "%s ",
681 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
682 }
683 }
684 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
685 fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
686 if (nh->rtnh_hops != 1)
687 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
688 fprintf(fp, " ");
689 } else {
690 fprintf(fp, "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
691 if (r->rtm_family != AF_MPLS)
692 fprintf(fp, "weight %d ",
693 nh->rtnh_hops+1);
694 }
695 if (nh->rtnh_flags & RTNH_F_DEAD)
696 fprintf(fp, "dead ");
697 if (nh->rtnh_flags & RTNH_F_ONLINK)
698 fprintf(fp, "onlink ");
699 if (nh->rtnh_flags & RTNH_F_PERVASIVE)
700 fprintf(fp, "pervasive ");
701 if (nh->rtnh_flags & RTNH_F_OFFLOAD)
702 fprintf(fp, "offload ");
703 if (nh->rtnh_flags & RTNH_F_LINKDOWN)
704 fprintf(fp, "linkdown ");
705 len -= NLMSG_ALIGN(nh->rtnh_len);
706 nh = RTNH_NEXT(nh);
707 }
708 }
709 if (tb[RTA_PREF]) {
710 unsigned int pref = rta_getattr_u8(tb[RTA_PREF]);
711
712 fprintf(fp, "pref ");
713
714 switch (pref) {
715 case ICMPV6_ROUTER_PREF_LOW:
716 fprintf(fp, "low");
717 break;
718 case ICMPV6_ROUTER_PREF_MEDIUM:
719 fprintf(fp, "medium");
720 break;
721 case ICMPV6_ROUTER_PREF_HIGH:
722 fprintf(fp, "high");
723 break;
724 default:
725 fprintf(fp, "%u", pref);
726 }
727 }
728 if (tb[RTA_TTL_PROPAGATE]) {
729 fprintf(fp, "ttl-propagate ");
730 if (rta_getattr_u8(tb[RTA_TTL_PROPAGATE]))
731 fprintf(fp, "enabled");
732 else
733 fprintf(fp, "disabled");
734 }
735 fprintf(fp, "\n");
736 fflush(fp);
737 return 0;
738 }
739
740 static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
741 struct rtattr *rta, struct rtnexthop *rtnh,
742 int *argcp, char ***argvp)
743 {
744 int argc = *argcp;
745 char **argv = *argvp;
746
747 while (++argv, --argc > 0) {
748 if (strcmp(*argv, "via") == 0) {
749 inet_prefix addr;
750 int family;
751
752 NEXT_ARG();
753 family = read_family(*argv);
754 if (family == AF_UNSPEC)
755 family = r->rtm_family;
756 else
757 NEXT_ARG();
758 get_addr(&addr, *argv, family);
759 if (r->rtm_family == AF_UNSPEC)
760 r->rtm_family = addr.family;
761 if (addr.family == r->rtm_family) {
762 rta_addattr_l(rta, 4096, RTA_GATEWAY, &addr.data, addr.bytelen);
763 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
764 } else {
765 rta_addattr_l(rta, 4096, RTA_VIA, &addr.family, addr.bytelen+2);
766 rtnh->rtnh_len += RTA_SPACE(addr.bytelen+2);
767 }
768 } else if (strcmp(*argv, "dev") == 0) {
769 NEXT_ARG();
770 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
771 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
772 return -1;
773 }
774 } else if (strcmp(*argv, "weight") == 0) {
775 unsigned int w;
776
777 NEXT_ARG();
778 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
779 invarg("\"weight\" is invalid\n", *argv);
780 rtnh->rtnh_hops = w - 1;
781 } else if (strcmp(*argv, "onlink") == 0) {
782 rtnh->rtnh_flags |= RTNH_F_ONLINK;
783 } else if (matches(*argv, "realms") == 0) {
784 __u32 realm;
785
786 NEXT_ARG();
787 if (get_rt_realms_or_raw(&realm, *argv))
788 invarg("\"realm\" value is invalid\n", *argv);
789 rta_addattr32(rta, 4096, RTA_FLOW, realm);
790 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
791 } else if (strcmp(*argv, "encap") == 0) {
792 int len = rta->rta_len;
793
794 lwt_parse_encap(rta, 4096, &argc, &argv);
795 rtnh->rtnh_len += rta->rta_len - len;
796 } else if (strcmp(*argv, "as") == 0) {
797 inet_prefix addr;
798
799 NEXT_ARG();
800 if (strcmp(*argv, "to") == 0)
801 NEXT_ARG();
802 get_addr(&addr, *argv, r->rtm_family);
803 rta_addattr_l(rta, 4096, RTA_NEWDST, &addr.data,
804 addr.bytelen);
805 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
806 } else
807 break;
808 }
809 *argcp = argc;
810 *argvp = argv;
811 return 0;
812 }
813
814 static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
815 int argc, char **argv)
816 {
817 char buf[1024];
818 struct rtattr *rta = (void *)buf;
819 struct rtnexthop *rtnh;
820
821 rta->rta_type = RTA_MULTIPATH;
822 rta->rta_len = RTA_LENGTH(0);
823 rtnh = RTA_DATA(rta);
824
825 while (argc > 0) {
826 if (strcmp(*argv, "nexthop") != 0) {
827 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
828 exit(-1);
829 }
830 if (argc <= 1) {
831 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
832 exit(-1);
833 }
834 memset(rtnh, 0, sizeof(*rtnh));
835 rtnh->rtnh_len = sizeof(*rtnh);
836 rta->rta_len += rtnh->rtnh_len;
837 parse_one_nh(n, r, rta, rtnh, &argc, &argv);
838 rtnh = RTNH_NEXT(rtnh);
839 }
840
841 if (rta->rta_len > RTA_LENGTH(0))
842 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
843 return 0;
844 }
845
846 static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
847 {
848 struct {
849 struct nlmsghdr n;
850 struct rtmsg r;
851 char buf[1024];
852 } req = {
853 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
854 .n.nlmsg_flags = NLM_F_REQUEST | flags,
855 .n.nlmsg_type = cmd,
856 .r.rtm_family = preferred_family,
857 .r.rtm_table = RT_TABLE_MAIN,
858 .r.rtm_scope = RT_SCOPE_NOWHERE,
859 };
860 char mxbuf[256];
861 struct rtattr *mxrta = (void *)mxbuf;
862 unsigned int mxlock = 0;
863 char *d = NULL;
864 int gw_ok = 0;
865 int dst_ok = 0;
866 int nhs_ok = 0;
867 int scope_ok = 0;
868 int table_ok = 0;
869 int raw = 0;
870 int type_ok = 0;
871
872 if (cmd != RTM_DELROUTE) {
873 req.r.rtm_protocol = RTPROT_BOOT;
874 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
875 req.r.rtm_type = RTN_UNICAST;
876 }
877
878 mxrta->rta_type = RTA_METRICS;
879 mxrta->rta_len = RTA_LENGTH(0);
880
881 while (argc > 0) {
882 if (strcmp(*argv, "src") == 0) {
883 inet_prefix addr;
884
885 NEXT_ARG();
886 get_addr(&addr, *argv, req.r.rtm_family);
887 if (req.r.rtm_family == AF_UNSPEC)
888 req.r.rtm_family = addr.family;
889 addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
890 } else if (strcmp(*argv, "as") == 0) {
891 inet_prefix addr;
892
893 NEXT_ARG();
894 if (strcmp(*argv, "to") == 0) {
895 NEXT_ARG();
896 }
897 get_addr(&addr, *argv, req.r.rtm_family);
898 if (req.r.rtm_family == AF_UNSPEC)
899 req.r.rtm_family = addr.family;
900 addattr_l(&req.n, sizeof(req), RTA_NEWDST, &addr.data, addr.bytelen);
901 } else if (strcmp(*argv, "via") == 0) {
902 inet_prefix addr;
903 int family;
904
905 if (gw_ok) {
906 invarg("use nexthop syntax to specify multiple via\n",
907 *argv);
908 }
909 gw_ok = 1;
910 NEXT_ARG();
911 family = read_family(*argv);
912 if (family == AF_UNSPEC)
913 family = req.r.rtm_family;
914 else
915 NEXT_ARG();
916 get_addr(&addr, *argv, family);
917 if (req.r.rtm_family == AF_UNSPEC)
918 req.r.rtm_family = addr.family;
919 if (addr.family == req.r.rtm_family)
920 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
921 &addr.data, addr.bytelen);
922 else
923 addattr_l(&req.n, sizeof(req), RTA_VIA,
924 &addr.family, addr.bytelen+2);
925 } else if (strcmp(*argv, "from") == 0) {
926 inet_prefix addr;
927
928 NEXT_ARG();
929 get_prefix(&addr, *argv, req.r.rtm_family);
930 if (req.r.rtm_family == AF_UNSPEC)
931 req.r.rtm_family = addr.family;
932 if (addr.bytelen)
933 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
934 req.r.rtm_src_len = addr.bitlen;
935 } else if (strcmp(*argv, "tos") == 0 ||
936 matches(*argv, "dsfield") == 0) {
937 __u32 tos;
938
939 NEXT_ARG();
940 if (rtnl_dsfield_a2n(&tos, *argv))
941 invarg("\"tos\" value is invalid\n", *argv);
942 req.r.rtm_tos = tos;
943 } else if (strcmp(*argv, "expires") == 0) {
944 __u32 expires;
945
946 NEXT_ARG();
947 if (get_u32(&expires, *argv, 0))
948 invarg("\"expires\" value is invalid\n", *argv);
949 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
950 } else if (matches(*argv, "metric") == 0 ||
951 matches(*argv, "priority") == 0 ||
952 strcmp(*argv, "preference") == 0) {
953 __u32 metric;
954
955 NEXT_ARG();
956 if (get_u32(&metric, *argv, 0))
957 invarg("\"metric\" value is invalid\n", *argv);
958 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
959 } else if (strcmp(*argv, "scope") == 0) {
960 __u32 scope = 0;
961
962 NEXT_ARG();
963 if (rtnl_rtscope_a2n(&scope, *argv))
964 invarg("invalid \"scope\" value\n", *argv);
965 req.r.rtm_scope = scope;
966 scope_ok = 1;
967 } else if (strcmp(*argv, "mtu") == 0) {
968 unsigned int mtu;
969
970 NEXT_ARG();
971 if (strcmp(*argv, "lock") == 0) {
972 mxlock |= (1<<RTAX_MTU);
973 NEXT_ARG();
974 }
975 if (get_unsigned(&mtu, *argv, 0))
976 invarg("\"mtu\" value is invalid\n", *argv);
977 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
978 } else if (strcmp(*argv, "hoplimit") == 0) {
979 unsigned int hoplimit;
980
981 NEXT_ARG();
982 if (strcmp(*argv, "lock") == 0) {
983 mxlock |= (1<<RTAX_HOPLIMIT);
984 NEXT_ARG();
985 }
986 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
987 invarg("\"hoplimit\" value is invalid\n", *argv);
988 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
989 } else if (strcmp(*argv, "advmss") == 0) {
990 unsigned int mss;
991
992 NEXT_ARG();
993 if (strcmp(*argv, "lock") == 0) {
994 mxlock |= (1<<RTAX_ADVMSS);
995 NEXT_ARG();
996 }
997 if (get_unsigned(&mss, *argv, 0))
998 invarg("\"mss\" value is invalid\n", *argv);
999 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
1000 } else if (matches(*argv, "reordering") == 0) {
1001 unsigned int reord;
1002
1003 NEXT_ARG();
1004 if (strcmp(*argv, "lock") == 0) {
1005 mxlock |= (1<<RTAX_REORDERING);
1006 NEXT_ARG();
1007 }
1008 if (get_unsigned(&reord, *argv, 0))
1009 invarg("\"reordering\" value is invalid\n", *argv);
1010 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1011 } else if (strcmp(*argv, "rtt") == 0) {
1012 unsigned int rtt;
1013
1014 NEXT_ARG();
1015 if (strcmp(*argv, "lock") == 0) {
1016 mxlock |= (1<<RTAX_RTT);
1017 NEXT_ARG();
1018 }
1019 if (get_time_rtt(&rtt, *argv, &raw))
1020 invarg("\"rtt\" value is invalid\n", *argv);
1021 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1022 (raw) ? rtt : rtt * 8);
1023 } else if (strcmp(*argv, "rto_min") == 0) {
1024 unsigned int rto_min;
1025
1026 NEXT_ARG();
1027 mxlock |= (1<<RTAX_RTO_MIN);
1028 if (get_time_rtt(&rto_min, *argv, &raw))
1029 invarg("\"rto_min\" value is invalid\n",
1030 *argv);
1031 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1032 rto_min);
1033 } else if (matches(*argv, "window") == 0) {
1034 unsigned int win;
1035
1036 NEXT_ARG();
1037 if (strcmp(*argv, "lock") == 0) {
1038 mxlock |= (1<<RTAX_WINDOW);
1039 NEXT_ARG();
1040 }
1041 if (get_unsigned(&win, *argv, 0))
1042 invarg("\"window\" value is invalid\n", *argv);
1043 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1044 } else if (matches(*argv, "cwnd") == 0) {
1045 unsigned int win;
1046
1047 NEXT_ARG();
1048 if (strcmp(*argv, "lock") == 0) {
1049 mxlock |= (1<<RTAX_CWND);
1050 NEXT_ARG();
1051 }
1052 if (get_unsigned(&win, *argv, 0))
1053 invarg("\"cwnd\" value is invalid\n", *argv);
1054 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1055 } else if (matches(*argv, "initcwnd") == 0) {
1056 unsigned int win;
1057
1058 NEXT_ARG();
1059 if (strcmp(*argv, "lock") == 0) {
1060 mxlock |= (1<<RTAX_INITCWND);
1061 NEXT_ARG();
1062 }
1063 if (get_unsigned(&win, *argv, 0))
1064 invarg("\"initcwnd\" value is invalid\n", *argv);
1065 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITCWND, win);
1066 } else if (matches(*argv, "initrwnd") == 0) {
1067 unsigned int win;
1068
1069 NEXT_ARG();
1070 if (strcmp(*argv, "lock") == 0) {
1071 mxlock |= (1<<RTAX_INITRWND);
1072 NEXT_ARG();
1073 }
1074 if (get_unsigned(&win, *argv, 0))
1075 invarg("\"initrwnd\" value is invalid\n", *argv);
1076 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITRWND, win);
1077 } else if (matches(*argv, "features") == 0) {
1078 unsigned int features = 0;
1079
1080 while (argc > 0) {
1081 NEXT_ARG();
1082
1083 if (strcmp(*argv, "ecn") == 0)
1084 features |= RTAX_FEATURE_ECN;
1085 else
1086 invarg("\"features\" value not valid\n", *argv);
1087 break;
1088 }
1089
1090 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FEATURES, features);
1091 } else if (matches(*argv, "quickack") == 0) {
1092 unsigned int quickack;
1093
1094 NEXT_ARG();
1095 if (get_unsigned(&quickack, *argv, 0))
1096 invarg("\"quickack\" value is invalid\n", *argv);
1097 if (quickack != 1 && quickack != 0)
1098 invarg("\"quickack\" value should be 0 or 1\n", *argv);
1099 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_QUICKACK, quickack);
1100 } else if (matches(*argv, "congctl") == 0) {
1101 NEXT_ARG();
1102 if (strcmp(*argv, "lock") == 0) {
1103 mxlock |= 1 << RTAX_CC_ALGO;
1104 NEXT_ARG();
1105 }
1106 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1107 strlen(*argv));
1108 } else if (matches(*argv, "rttvar") == 0) {
1109 unsigned int win;
1110
1111 NEXT_ARG();
1112 if (strcmp(*argv, "lock") == 0) {
1113 mxlock |= (1<<RTAX_RTTVAR);
1114 NEXT_ARG();
1115 }
1116 if (get_time_rtt(&win, *argv, &raw))
1117 invarg("\"rttvar\" value is invalid\n", *argv);
1118 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1119 (raw) ? win : win * 4);
1120 } else if (matches(*argv, "ssthresh") == 0) {
1121 unsigned int win;
1122
1123 NEXT_ARG();
1124 if (strcmp(*argv, "lock") == 0) {
1125 mxlock |= (1<<RTAX_SSTHRESH);
1126 NEXT_ARG();
1127 }
1128 if (get_unsigned(&win, *argv, 0))
1129 invarg("\"ssthresh\" value is invalid\n", *argv);
1130 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1131 } else if (matches(*argv, "realms") == 0) {
1132 __u32 realm;
1133
1134 NEXT_ARG();
1135 if (get_rt_realms_or_raw(&realm, *argv))
1136 invarg("\"realm\" value is invalid\n", *argv);
1137 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1138 } else if (strcmp(*argv, "onlink") == 0) {
1139 req.r.rtm_flags |= RTNH_F_ONLINK;
1140 } else if (strcmp(*argv, "nexthop") == 0) {
1141 nhs_ok = 1;
1142 break;
1143 } else if (matches(*argv, "protocol") == 0) {
1144 __u32 prot;
1145
1146 NEXT_ARG();
1147 if (rtnl_rtprot_a2n(&prot, *argv))
1148 invarg("\"protocol\" value is invalid\n", *argv);
1149 req.r.rtm_protocol = prot;
1150 } else if (matches(*argv, "table") == 0) {
1151 __u32 tid;
1152
1153 NEXT_ARG();
1154 if (rtnl_rttable_a2n(&tid, *argv))
1155 invarg("\"table\" value is invalid\n", *argv);
1156 if (tid < 256)
1157 req.r.rtm_table = tid;
1158 else {
1159 req.r.rtm_table = RT_TABLE_UNSPEC;
1160 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1161 }
1162 table_ok = 1;
1163 } else if (matches(*argv, "vrf") == 0) {
1164 __u32 tid;
1165
1166 NEXT_ARG();
1167 tid = ipvrf_get_table(*argv);
1168 if (tid == 0)
1169 invarg("Invalid VRF\n", *argv);
1170 if (tid < 256)
1171 req.r.rtm_table = tid;
1172 else {
1173 req.r.rtm_table = RT_TABLE_UNSPEC;
1174 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1175 }
1176 table_ok = 1;
1177 } else if (strcmp(*argv, "dev") == 0 ||
1178 strcmp(*argv, "oif") == 0) {
1179 NEXT_ARG();
1180 d = *argv;
1181 } else if (matches(*argv, "pref") == 0) {
1182 __u8 pref;
1183
1184 NEXT_ARG();
1185 if (strcmp(*argv, "low") == 0)
1186 pref = ICMPV6_ROUTER_PREF_LOW;
1187 else if (strcmp(*argv, "medium") == 0)
1188 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1189 else if (strcmp(*argv, "high") == 0)
1190 pref = ICMPV6_ROUTER_PREF_HIGH;
1191 else if (get_u8(&pref, *argv, 0))
1192 invarg("\"pref\" value is invalid\n", *argv);
1193 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1194 } else if (strcmp(*argv, "encap") == 0) {
1195 char buf[1024];
1196 struct rtattr *rta = (void *)buf;
1197
1198 rta->rta_type = RTA_ENCAP;
1199 rta->rta_len = RTA_LENGTH(0);
1200
1201 lwt_parse_encap(rta, sizeof(buf), &argc, &argv);
1202
1203 if (rta->rta_len > RTA_LENGTH(0))
1204 addraw_l(&req.n, 1024, RTA_DATA(rta), RTA_PAYLOAD(rta));
1205 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1206 __u8 ttl_prop;
1207
1208 NEXT_ARG();
1209 if (matches(*argv, "enabled") == 0)
1210 ttl_prop = 1;
1211 else if (matches(*argv, "disabled") == 0)
1212 ttl_prop = 0;
1213 else
1214 invarg("\"ttl-propagate\" value is invalid\n",
1215 *argv);
1216
1217 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1218 ttl_prop);
1219 } else {
1220 int type;
1221 inet_prefix dst;
1222
1223 if (strcmp(*argv, "to") == 0) {
1224 NEXT_ARG();
1225 }
1226 if ((**argv < '0' || **argv > '9') &&
1227 rtnl_rtntype_a2n(&type, *argv) == 0) {
1228 NEXT_ARG();
1229 req.r.rtm_type = type;
1230 type_ok = 1;
1231 }
1232
1233 if (matches(*argv, "help") == 0)
1234 usage();
1235 if (dst_ok)
1236 duparg2("to", *argv);
1237 get_prefix(&dst, *argv, req.r.rtm_family);
1238 if (req.r.rtm_family == AF_UNSPEC)
1239 req.r.rtm_family = dst.family;
1240 req.r.rtm_dst_len = dst.bitlen;
1241 dst_ok = 1;
1242 if (dst.bytelen)
1243 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
1244 }
1245 argc--; argv++;
1246 }
1247
1248 if (!dst_ok)
1249 usage();
1250
1251 if (d) {
1252 int idx;
1253
1254 if ((idx = ll_name_to_index(d)) == 0) {
1255 fprintf(stderr, "Cannot find device \"%s\"\n", d);
1256 return -1;
1257 }
1258 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1259 }
1260
1261 if (mxrta->rta_len > RTA_LENGTH(0)) {
1262 if (mxlock)
1263 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1264 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1265 }
1266
1267 if (nhs_ok)
1268 parse_nexthops(&req.n, &req.r, argc, argv);
1269
1270 if (req.r.rtm_family == AF_UNSPEC)
1271 req.r.rtm_family = AF_INET;
1272
1273 if (!table_ok) {
1274 if (req.r.rtm_type == RTN_LOCAL ||
1275 req.r.rtm_type == RTN_BROADCAST ||
1276 req.r.rtm_type == RTN_NAT ||
1277 req.r.rtm_type == RTN_ANYCAST)
1278 req.r.rtm_table = RT_TABLE_LOCAL;
1279 }
1280 if (!scope_ok) {
1281 if (req.r.rtm_family == AF_INET6 ||
1282 req.r.rtm_family == AF_MPLS)
1283 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1284 else if (req.r.rtm_type == RTN_LOCAL ||
1285 req.r.rtm_type == RTN_NAT)
1286 req.r.rtm_scope = RT_SCOPE_HOST;
1287 else if (req.r.rtm_type == RTN_BROADCAST ||
1288 req.r.rtm_type == RTN_MULTICAST ||
1289 req.r.rtm_type == RTN_ANYCAST)
1290 req.r.rtm_scope = RT_SCOPE_LINK;
1291 else if (req.r.rtm_type == RTN_UNICAST ||
1292 req.r.rtm_type == RTN_UNSPEC) {
1293 if (cmd == RTM_DELROUTE)
1294 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1295 else if (!gw_ok && !nhs_ok)
1296 req.r.rtm_scope = RT_SCOPE_LINK;
1297 }
1298 }
1299
1300 if (!type_ok && req.r.rtm_family == AF_MPLS)
1301 req.r.rtm_type = RTN_UNICAST;
1302
1303 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
1304 return -2;
1305
1306 return 0;
1307 }
1308
1309 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
1310 {
1311 struct {
1312 struct nlmsghdr nlh;
1313 struct rtmsg rtm;
1314 } req = {
1315 .nlh.nlmsg_len = sizeof(req),
1316 .nlh.nlmsg_type = RTM_GETROUTE,
1317 .nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST,
1318 .nlh.nlmsg_seq = rth->dump = ++rth->seq,
1319 .rtm.rtm_family = family,
1320 .rtm.rtm_flags = RTM_F_CLONED,
1321 };
1322 struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
1323
1324 return sendto(rth->fd, (void *)&req, sizeof(req), 0, (struct sockaddr *)&nladdr, sizeof(nladdr));
1325 }
1326
1327 static int iproute_flush_cache(void)
1328 {
1329 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1330
1331 int len;
1332 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1333 char *buffer = "-1";
1334
1335 if (flush_fd < 0) {
1336 fprintf(stderr, "Cannot open \"%s\": %s\n",
1337 ROUTE_FLUSH_PATH, strerror(errno));
1338 return -1;
1339 }
1340
1341 len = strlen(buffer);
1342
1343 if ((write(flush_fd, (void *)buffer, len)) < len) {
1344 fprintf(stderr, "Cannot flush routing cache\n");
1345 close(flush_fd);
1346 return -1;
1347 }
1348 close(flush_fd);
1349 return 0;
1350 }
1351
1352 static __u32 route_dump_magic = 0x45311224;
1353
1354 static int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n,
1355 void *arg)
1356 {
1357 int ret;
1358 int len = n->nlmsg_len;
1359 struct rtmsg *r = NLMSG_DATA(n);
1360 struct rtattr *tb[RTA_MAX+1];
1361 int host_len;
1362
1363 host_len = af_bit_len(r->rtm_family);
1364 len -= NLMSG_LENGTH(sizeof(*r));
1365 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1366
1367 if (!filter_nlmsg(n, tb, host_len))
1368 return 0;
1369
1370 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1371 if ((ret > 0) && (ret != n->nlmsg_len)) {
1372 fprintf(stderr, "Short write while saving nlmsg\n");
1373 ret = -EIO;
1374 }
1375
1376 return ret == n->nlmsg_len ? 0 : ret;
1377 }
1378
1379 static int save_route_prep(void)
1380 {
1381 int ret;
1382
1383 if (isatty(STDOUT_FILENO)) {
1384 fprintf(stderr, "Not sending a binary stream to stdout\n");
1385 return -1;
1386 }
1387
1388 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1389 if (ret != sizeof(route_dump_magic)) {
1390 fprintf(stderr, "Can't write magic to dump file\n");
1391 return -1;
1392 }
1393
1394 return 0;
1395 }
1396
1397 static int iproute_list_flush_or_save(int argc, char **argv, int action)
1398 {
1399 int do_ipv6 = preferred_family;
1400 char *id = NULL;
1401 char *od = NULL;
1402 unsigned int mark = 0;
1403 rtnl_filter_t filter_fn;
1404 int ret;
1405
1406 if (action == IPROUTE_SAVE) {
1407 if (save_route_prep())
1408 return -1;
1409
1410 filter_fn = save_route;
1411 } else
1412 filter_fn = print_route;
1413
1414 iproute_reset_filter(0);
1415 filter.tb = RT_TABLE_MAIN;
1416
1417 if ((action == IPROUTE_FLUSH) && argc <= 0) {
1418 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1419 return -1;
1420 }
1421
1422 while (argc > 0) {
1423 if (matches(*argv, "table") == 0) {
1424 __u32 tid;
1425
1426 NEXT_ARG();
1427 if (rtnl_rttable_a2n(&tid, *argv)) {
1428 if (strcmp(*argv, "all") == 0) {
1429 filter.tb = 0;
1430 } else if (strcmp(*argv, "cache") == 0) {
1431 filter.cloned = 1;
1432 } else if (strcmp(*argv, "help") == 0) {
1433 usage();
1434 } else {
1435 invarg("table id value is invalid\n", *argv);
1436 }
1437 } else
1438 filter.tb = tid;
1439 } else if (matches(*argv, "vrf") == 0) {
1440 __u32 tid;
1441
1442 NEXT_ARG();
1443 tid = ipvrf_get_table(*argv);
1444 if (tid == 0)
1445 invarg("Invalid VRF\n", *argv);
1446 filter.tb = tid;
1447 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1448 } else if (matches(*argv, "cached") == 0 ||
1449 matches(*argv, "cloned") == 0) {
1450 filter.cloned = 1;
1451 } else if (strcmp(*argv, "tos") == 0 ||
1452 matches(*argv, "dsfield") == 0) {
1453 __u32 tos;
1454
1455 NEXT_ARG();
1456 if (rtnl_dsfield_a2n(&tos, *argv))
1457 invarg("TOS value is invalid\n", *argv);
1458 filter.tos = tos;
1459 filter.tosmask = -1;
1460 } else if (matches(*argv, "protocol") == 0) {
1461 __u32 prot = 0;
1462
1463 NEXT_ARG();
1464 filter.protocolmask = -1;
1465 if (rtnl_rtprot_a2n(&prot, *argv)) {
1466 if (strcmp(*argv, "all") != 0)
1467 invarg("invalid \"protocol\"\n", *argv);
1468 prot = 0;
1469 filter.protocolmask = 0;
1470 }
1471 filter.protocol = prot;
1472 } else if (matches(*argv, "scope") == 0) {
1473 __u32 scope = 0;
1474
1475 NEXT_ARG();
1476 filter.scopemask = -1;
1477 if (rtnl_rtscope_a2n(&scope, *argv)) {
1478 if (strcmp(*argv, "all") != 0)
1479 invarg("invalid \"scope\"\n", *argv);
1480 scope = RT_SCOPE_NOWHERE;
1481 filter.scopemask = 0;
1482 }
1483 filter.scope = scope;
1484 } else if (matches(*argv, "type") == 0) {
1485 int type;
1486
1487 NEXT_ARG();
1488 if (rtnl_rtntype_a2n(&type, *argv))
1489 invarg("node type value is invalid\n", *argv);
1490 filter.typemask = (1<<type);
1491 } else if (strcmp(*argv, "dev") == 0 ||
1492 strcmp(*argv, "oif") == 0) {
1493 NEXT_ARG();
1494 od = *argv;
1495 } else if (strcmp(*argv, "iif") == 0) {
1496 NEXT_ARG();
1497 id = *argv;
1498 } else if (strcmp(*argv, "mark") == 0) {
1499 NEXT_ARG();
1500 if (get_unsigned(&mark, *argv, 0))
1501 invarg("invalid mark value", *argv);
1502 filter.markmask = -1;
1503 } else if (strcmp(*argv, "via") == 0) {
1504 int family;
1505
1506 NEXT_ARG();
1507 family = read_family(*argv);
1508 if (family == AF_UNSPEC)
1509 family = do_ipv6;
1510 else
1511 NEXT_ARG();
1512 get_prefix(&filter.rvia, *argv, family);
1513 } else if (strcmp(*argv, "src") == 0) {
1514 NEXT_ARG();
1515 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1516 } else if (matches(*argv, "realms") == 0) {
1517 __u32 realm;
1518
1519 NEXT_ARG();
1520 if (get_rt_realms_or_raw(&realm, *argv))
1521 invarg("invalid realms\n", *argv);
1522 filter.realm = realm;
1523 filter.realmmask = ~0U;
1524 if ((filter.realm&0xFFFF) == 0 &&
1525 (*argv)[strlen(*argv) - 1] == '/')
1526 filter.realmmask &= ~0xFFFF;
1527 if ((filter.realm&0xFFFF0000U) == 0 &&
1528 (strchr(*argv, '/') == NULL ||
1529 (*argv)[0] == '/'))
1530 filter.realmmask &= ~0xFFFF0000U;
1531 } else if (matches(*argv, "from") == 0) {
1532 NEXT_ARG();
1533 if (matches(*argv, "root") == 0) {
1534 NEXT_ARG();
1535 get_prefix(&filter.rsrc, *argv, do_ipv6);
1536 } else if (matches(*argv, "match") == 0) {
1537 NEXT_ARG();
1538 get_prefix(&filter.msrc, *argv, do_ipv6);
1539 } else {
1540 if (matches(*argv, "exact") == 0) {
1541 NEXT_ARG();
1542 }
1543 get_prefix(&filter.msrc, *argv, do_ipv6);
1544 filter.rsrc = filter.msrc;
1545 }
1546 } else {
1547 if (matches(*argv, "to") == 0) {
1548 NEXT_ARG();
1549 }
1550 if (matches(*argv, "root") == 0) {
1551 NEXT_ARG();
1552 get_prefix(&filter.rdst, *argv, do_ipv6);
1553 } else if (matches(*argv, "match") == 0) {
1554 NEXT_ARG();
1555 get_prefix(&filter.mdst, *argv, do_ipv6);
1556 } else {
1557 if (matches(*argv, "exact") == 0) {
1558 NEXT_ARG();
1559 }
1560 get_prefix(&filter.mdst, *argv, do_ipv6);
1561 filter.rdst = filter.mdst;
1562 }
1563 }
1564 argc--; argv++;
1565 }
1566
1567 if (do_ipv6 == AF_UNSPEC && filter.tb)
1568 do_ipv6 = AF_INET;
1569
1570 if (id || od) {
1571 int idx;
1572
1573 if (id) {
1574 if ((idx = ll_name_to_index(id)) == 0) {
1575 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1576 return -1;
1577 }
1578 filter.iif = idx;
1579 filter.iifmask = -1;
1580 }
1581 if (od) {
1582 if ((idx = ll_name_to_index(od)) == 0) {
1583 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1584 return -1;
1585 }
1586 filter.oif = idx;
1587 filter.oifmask = -1;
1588 }
1589 }
1590 filter.mark = mark;
1591
1592 if (action == IPROUTE_FLUSH) {
1593 int round = 0;
1594 char flushb[4096-512];
1595 time_t start = time(0);
1596
1597 if (filter.cloned) {
1598 if (do_ipv6 != AF_INET6) {
1599 iproute_flush_cache();
1600 if (show_stats)
1601 printf("*** IPv4 routing cache is flushed.\n");
1602 }
1603 if (do_ipv6 == AF_INET)
1604 return 0;
1605 }
1606
1607 filter.flushb = flushb;
1608 filter.flushp = 0;
1609 filter.flushe = sizeof(flushb);
1610
1611 for (;;) {
1612 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1613 perror("Cannot send dump request");
1614 return -2;
1615 }
1616 filter.flushed = 0;
1617 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1618 fprintf(stderr, "Flush terminated\n");
1619 return -2;
1620 }
1621 if (filter.flushed == 0) {
1622 if (show_stats) {
1623 if (round == 0 && (!filter.cloned || do_ipv6 == AF_INET6))
1624 printf("Nothing to flush.\n");
1625 else
1626 printf("*** Flush is complete after %d round%s ***\n", round, round > 1?"s":"");
1627 }
1628 fflush(stdout);
1629 return 0;
1630 }
1631 round++;
1632 if ((ret = flush_update()) < 0)
1633 return ret;
1634
1635 if (time(0) - start > 30) {
1636 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1637 (long)(time(0) - start), filter.flushed);
1638 return -1;
1639 }
1640
1641 if (show_stats) {
1642 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1643 fflush(stdout);
1644 }
1645 }
1646 }
1647
1648 if (!filter.cloned) {
1649 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1650 perror("Cannot send dump request");
1651 return -2;
1652 }
1653 } else {
1654 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1655 perror("Cannot send dump request");
1656 return -2;
1657 }
1658 }
1659
1660 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1661 fprintf(stderr, "Dump terminated\n");
1662 return -2;
1663 }
1664
1665 return 0;
1666 }
1667
1668
1669 static int iproute_get(int argc, char **argv)
1670 {
1671 struct {
1672 struct nlmsghdr n;
1673 struct rtmsg r;
1674 char buf[1024];
1675 } req = {
1676 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1677 .n.nlmsg_flags = NLM_F_REQUEST,
1678 .n.nlmsg_type = RTM_GETROUTE,
1679 .r.rtm_family = preferred_family,
1680 };
1681 char *idev = NULL;
1682 char *odev = NULL;
1683 int connected = 0;
1684 int fib_match = 0;
1685 int from_ok = 0;
1686 unsigned int mark = 0;
1687
1688 iproute_reset_filter(0);
1689 filter.cloned = 2;
1690
1691 while (argc > 0) {
1692 if (strcmp(*argv, "tos") == 0 ||
1693 matches(*argv, "dsfield") == 0) {
1694 __u32 tos;
1695
1696 NEXT_ARG();
1697 if (rtnl_dsfield_a2n(&tos, *argv))
1698 invarg("TOS value is invalid\n", *argv);
1699 req.r.rtm_tos = tos;
1700 } else if (matches(*argv, "from") == 0) {
1701 inet_prefix addr;
1702
1703 NEXT_ARG();
1704 if (matches(*argv, "help") == 0)
1705 usage();
1706 from_ok = 1;
1707 get_prefix(&addr, *argv, req.r.rtm_family);
1708 if (req.r.rtm_family == AF_UNSPEC)
1709 req.r.rtm_family = addr.family;
1710 if (addr.bytelen)
1711 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1712 req.r.rtm_src_len = addr.bitlen;
1713 } else if (matches(*argv, "iif") == 0) {
1714 NEXT_ARG();
1715 idev = *argv;
1716 } else if (matches(*argv, "mark") == 0) {
1717 NEXT_ARG();
1718 if (get_unsigned(&mark, *argv, 0))
1719 invarg("invalid mark value", *argv);
1720 } else if (matches(*argv, "oif") == 0 ||
1721 strcmp(*argv, "dev") == 0) {
1722 NEXT_ARG();
1723 odev = *argv;
1724 } else if (matches(*argv, "notify") == 0) {
1725 req.r.rtm_flags |= RTM_F_NOTIFY;
1726 } else if (matches(*argv, "connected") == 0) {
1727 connected = 1;
1728 } else if (matches(*argv, "vrf") == 0) {
1729 NEXT_ARG();
1730 if (!name_is_vrf(*argv))
1731 invarg("Invalid VRF\n", *argv);
1732 odev = *argv;
1733 } else if (matches(*argv, "uid") == 0) {
1734 uid_t uid;
1735
1736 NEXT_ARG();
1737 if (get_unsigned(&uid, *argv, 0))
1738 invarg("invalid UID\n", *argv);
1739 addattr32(&req.n, sizeof(req), RTA_UID, uid);
1740 } else if (matches(*argv, "fibmatch") == 0) {
1741 fib_match = 1;
1742 } else if (strcmp(*argv, "as") == 0) {
1743 inet_prefix addr;
1744
1745 NEXT_ARG();
1746 if (strcmp(*argv, "to") == 0)
1747 NEXT_ARG();
1748 get_addr(&addr, *argv, req.r.rtm_family);
1749 if (req.r.rtm_family == AF_UNSPEC)
1750 req.r.rtm_family = addr.family;
1751 addattr_l(&req.n, sizeof(req), RTA_NEWDST, &addr.data, addr.bytelen);
1752 } else {
1753 inet_prefix addr;
1754
1755 if (strcmp(*argv, "to") == 0) {
1756 NEXT_ARG();
1757 }
1758 if (matches(*argv, "help") == 0)
1759 usage();
1760 get_prefix(&addr, *argv, req.r.rtm_family);
1761 if (req.r.rtm_family == AF_UNSPEC)
1762 req.r.rtm_family = addr.family;
1763 if (addr.bytelen)
1764 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1765 req.r.rtm_dst_len = addr.bitlen;
1766 }
1767 argc--; argv++;
1768 }
1769
1770 if (req.r.rtm_dst_len == 0) {
1771 fprintf(stderr, "need at least a destination address\n");
1772 return -1;
1773 }
1774
1775 if (idev || odev) {
1776 int idx;
1777
1778 if (idev) {
1779 if ((idx = ll_name_to_index(idev)) == 0) {
1780 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1781 return -1;
1782 }
1783 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1784 }
1785 if (odev) {
1786 if ((idx = ll_name_to_index(odev)) == 0) {
1787 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1788 return -1;
1789 }
1790 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1791 }
1792 }
1793 if (mark)
1794 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
1795
1796 if (req.r.rtm_family == AF_UNSPEC)
1797 req.r.rtm_family = AF_INET;
1798
1799 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
1800 if (fib_match)
1801 req.r.rtm_flags |= RTM_F_FIB_MATCH;
1802
1803 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
1804 return -2;
1805
1806 if (connected && !from_ok) {
1807 struct rtmsg *r = NLMSG_DATA(&req.n);
1808 int len = req.n.nlmsg_len;
1809 struct rtattr *tb[RTA_MAX+1];
1810
1811 if (print_route(NULL, &req.n, (void *)stdout) < 0) {
1812 fprintf(stderr, "An error :-)\n");
1813 return -1;
1814 }
1815
1816 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1817 fprintf(stderr, "Not a route?\n");
1818 return -1;
1819 }
1820 len -= NLMSG_LENGTH(sizeof(*r));
1821 if (len < 0) {
1822 fprintf(stderr, "Wrong len %d\n", len);
1823 return -1;
1824 }
1825
1826 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1827
1828 if (tb[RTA_PREFSRC]) {
1829 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1830 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1831 } else if (!tb[RTA_SRC]) {
1832 fprintf(stderr, "Failed to connect the route\n");
1833 return -1;
1834 }
1835 if (!odev && tb[RTA_OIF])
1836 tb[RTA_OIF]->rta_type = 0;
1837 if (tb[RTA_GATEWAY])
1838 tb[RTA_GATEWAY]->rta_type = 0;
1839 if (tb[RTA_VIA])
1840 tb[RTA_VIA]->rta_type = 0;
1841 if (!idev && tb[RTA_IIF])
1842 tb[RTA_IIF]->rta_type = 0;
1843 req.n.nlmsg_flags = NLM_F_REQUEST;
1844 req.n.nlmsg_type = RTM_GETROUTE;
1845
1846 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
1847 return -2;
1848 }
1849
1850 if (print_route(NULL, &req.n, (void *)stdout) < 0) {
1851 fprintf(stderr, "An error :-)\n");
1852 return -1;
1853 }
1854
1855 return 0;
1856 }
1857
1858 static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
1859 {
1860 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
1861 return 1;
1862
1863 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
1864 }
1865
1866 static int restore_handler(const struct sockaddr_nl *nl,
1867 struct rtnl_ctrl_data *ctrl,
1868 struct nlmsghdr *n, void *arg)
1869 {
1870 struct rtmsg *r = NLMSG_DATA(n);
1871 struct rtattr *tb[RTA_MAX+1];
1872 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
1873 int ret, prio = *(int *)arg;
1874
1875 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1876
1877 /* Restore routes in correct order:
1878 * 0. ones for local addresses,
1879 * 1. ones for local networks,
1880 * 2. others (remote networks/hosts).
1881 */
1882 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
1883 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
1884 goto restore;
1885 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
1886 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
1887 goto restore;
1888 else if (prio == 2 && tb[RTA_GATEWAY])
1889 goto restore;
1890
1891 return 0;
1892
1893 restore:
1894 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
1895
1896 ll_init_map(&rth);
1897
1898 ret = rtnl_talk(&rth, n, n, sizeof(*n));
1899 if ((ret < 0) && (errno == EEXIST))
1900 ret = 0;
1901
1902 return ret;
1903 }
1904
1905 static int route_dump_check_magic(void)
1906 {
1907 int ret;
1908 __u32 magic = 0;
1909
1910 if (isatty(STDIN_FILENO)) {
1911 fprintf(stderr, "Can't restore route dump from a terminal\n");
1912 return -1;
1913 }
1914
1915 ret = fread(&magic, sizeof(magic), 1, stdin);
1916 if (magic != route_dump_magic) {
1917 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
1918 return -1;
1919 }
1920
1921 return 0;
1922 }
1923
1924 static int iproute_restore(void)
1925 {
1926 int pos, prio;
1927
1928 if (route_dump_check_magic())
1929 return -1;
1930
1931 pos = ftell(stdin);
1932 if (pos == -1) {
1933 perror("Failed to restore: ftell");
1934 return -1;
1935 }
1936
1937 for (prio = 0; prio < 3; prio++) {
1938 int err;
1939
1940 err = rtnl_from_file(stdin, &restore_handler, &prio);
1941 if (err)
1942 return -2;
1943
1944 if (fseek(stdin, pos, SEEK_SET) == -1) {
1945 perror("Failed to restore: fseek");
1946 return -1;
1947 }
1948 }
1949
1950 return 0;
1951 }
1952
1953 static int show_handler(const struct sockaddr_nl *nl,
1954 struct rtnl_ctrl_data *ctrl,
1955 struct nlmsghdr *n, void *arg)
1956 {
1957 print_route(nl, n, stdout);
1958 return 0;
1959 }
1960
1961 static int iproute_showdump(void)
1962 {
1963 if (route_dump_check_magic())
1964 return -1;
1965
1966 if (rtnl_from_file(stdin, &show_handler, NULL))
1967 return -2;
1968
1969 return 0;
1970 }
1971
1972 void iproute_reset_filter(int ifindex)
1973 {
1974 memset(&filter, 0, sizeof(filter));
1975 filter.mdst.bitlen = -1;
1976 filter.msrc.bitlen = -1;
1977 filter.oif = ifindex;
1978 if (filter.oif > 0)
1979 filter.oifmask = -1;
1980 }
1981
1982 int do_iproute(int argc, char **argv)
1983 {
1984 if (argc < 1)
1985 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
1986
1987 if (matches(*argv, "add") == 0)
1988 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1989 argc-1, argv+1);
1990 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1991 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1992 argc-1, argv+1);
1993 if (matches(*argv, "replace") == 0)
1994 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1995 argc-1, argv+1);
1996 if (matches(*argv, "prepend") == 0)
1997 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1998 argc-1, argv+1);
1999 if (matches(*argv, "append") == 0)
2000 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
2001 argc-1, argv+1);
2002 if (matches(*argv, "test") == 0)
2003 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
2004 argc-1, argv+1);
2005 if (matches(*argv, "delete") == 0)
2006 return iproute_modify(RTM_DELROUTE, 0,
2007 argc-1, argv+1);
2008 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2009 || matches(*argv, "lst") == 0)
2010 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
2011 if (matches(*argv, "get") == 0)
2012 return iproute_get(argc-1, argv+1);
2013 if (matches(*argv, "flush") == 0)
2014 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2015 if (matches(*argv, "save") == 0)
2016 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2017 if (matches(*argv, "restore") == 0)
2018 return iproute_restore();
2019 if (matches(*argv, "showdump") == 0)
2020 return iproute_showdump();
2021 if (matches(*argv, "help") == 0)
2022 usage();
2023 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
2024 exit(-1);
2025 }
Upstream mirror of iproute2