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iproute: Add support for ttl-propagation attribute
[mirror_iproute2.git] / ip / iproute.c
1 /*
2 * iproute.c "ip route".
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 */
12
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <unistd.h>
16 #include <syslog.h>
17 #include <fcntl.h>
18 #include <string.h>
19 #include <time.h>
20 #include <sys/time.h>
21 #include <sys/socket.h>
22 #include <netinet/in.h>
23 #include <netinet/ip.h>
24 #include <arpa/inet.h>
25 #include <linux/in_route.h>
26 #include <linux/icmpv6.h>
27 #include <errno.h>
28
29 #include "rt_names.h"
30 #include "utils.h"
31 #include "ip_common.h"
32 #include "iproute_lwtunnel.h"
33
34 #ifndef RTAX_RTTVAR
35 #define RTAX_RTTVAR RTAX_HOPS
36 #endif
37
38 enum list_action {
39 IPROUTE_LIST,
40 IPROUTE_FLUSH,
41 IPROUTE_SAVE,
42 };
43 static const char *mx_names[RTAX_MAX+1] = {
44 [RTAX_MTU] = "mtu",
45 [RTAX_WINDOW] = "window",
46 [RTAX_RTT] = "rtt",
47 [RTAX_RTTVAR] = "rttvar",
48 [RTAX_SSTHRESH] = "ssthresh",
49 [RTAX_CWND] = "cwnd",
50 [RTAX_ADVMSS] = "advmss",
51 [RTAX_REORDERING] = "reordering",
52 [RTAX_HOPLIMIT] = "hoplimit",
53 [RTAX_INITCWND] = "initcwnd",
54 [RTAX_FEATURES] = "features",
55 [RTAX_RTO_MIN] = "rto_min",
56 [RTAX_INITRWND] = "initrwnd",
57 [RTAX_QUICKACK] = "quickack",
58 [RTAX_CC_ALGO] = "congctl",
59 };
60 static void usage(void) __attribute__((noreturn));
61
62 static void usage(void)
63 {
64 fprintf(stderr, "Usage: ip route { list | flush } SELECTOR\n");
65 fprintf(stderr, " ip route save SELECTOR\n");
66 fprintf(stderr, " ip route restore\n");
67 fprintf(stderr, " ip route showdump\n");
68 fprintf(stderr, " ip route get ADDRESS [ from ADDRESS iif STRING ]\n");
69 fprintf(stderr, " [ oif STRING ] [ tos TOS ]\n");
70 fprintf(stderr, " [ mark NUMBER ] [ vrf NAME ]\n");
71 fprintf(stderr, " [ uid NUMBER ]\n");
72 fprintf(stderr, " ip route { add | del | change | append | replace } ROUTE\n");
73 fprintf(stderr, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n");
74 fprintf(stderr, " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n");
75 fprintf(stderr, " [ type TYPE ] [ scope SCOPE ]\n");
76 fprintf(stderr, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n");
77 fprintf(stderr, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n");
78 fprintf(stderr, " [ table TABLE_ID ] [ proto RTPROTO ]\n");
79 fprintf(stderr, " [ scope SCOPE ] [ metric METRIC ]\n");
80 fprintf(stderr, " [ ttl-propagate { enabled | disabled } ]\n");
81 fprintf(stderr, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n");
82 fprintf(stderr, "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n");
83 fprintf(stderr, " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n");
84 fprintf(stderr, "FAMILY := [ inet | inet6 | ipx | dnet | mpls | bridge | link ]\n");
85 fprintf(stderr, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n");
86 fprintf(stderr, " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n");
87 fprintf(stderr, " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n");
88 fprintf(stderr, " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n");
89 fprintf(stderr, " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n");
90 fprintf(stderr, " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n");
91 fprintf(stderr, " [ pref PREF ] [ expires TIME ]\n");
92 fprintf(stderr, "TYPE := { unicast | local | broadcast | multicast | throw |\n");
93 fprintf(stderr, " unreachable | prohibit | blackhole | nat }\n");
94 fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
95 fprintf(stderr, "SCOPE := [ host | link | global | NUMBER ]\n");
96 fprintf(stderr, "NHFLAGS := [ onlink | pervasive ]\n");
97 fprintf(stderr, "RTPROTO := [ kernel | boot | static | NUMBER ]\n");
98 fprintf(stderr, "PREF := [ low | medium | high ]\n");
99 fprintf(stderr, "TIME := NUMBER[s|ms]\n");
100 fprintf(stderr, "BOOL := [1|0]\n");
101 fprintf(stderr, "FEATURES := ecn\n");
102 fprintf(stderr, "ENCAPTYPE := [ mpls | ip | ip6 ]\n");
103 fprintf(stderr, "ENCAPHDR := [ MPLSLABEL ]\n");
104 exit(-1);
105 }
106
107
108 static struct
109 {
110 unsigned int tb;
111 int cloned;
112 int flushed;
113 char *flushb;
114 int flushp;
115 int flushe;
116 int protocol, protocolmask;
117 int scope, scopemask;
118 __u64 typemask;
119 int tos, tosmask;
120 int iif, iifmask;
121 int oif, oifmask;
122 int mark, markmask;
123 int realm, realmmask;
124 inet_prefix rprefsrc;
125 inet_prefix rvia;
126 inet_prefix rdst;
127 inet_prefix mdst;
128 inet_prefix rsrc;
129 inet_prefix msrc;
130 } filter;
131
132 static int flush_update(void)
133 {
134 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
135 perror("Failed to send flush request");
136 return -1;
137 }
138 filter.flushp = 0;
139 return 0;
140 }
141
142 static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
143 {
144 struct rtmsg *r = NLMSG_DATA(n);
145 inet_prefix dst = { .family = r->rtm_family };
146 inet_prefix src = { .family = r->rtm_family };
147 inet_prefix via = { .family = r->rtm_family };
148 inet_prefix prefsrc = { .family = r->rtm_family };
149 __u32 table;
150 static int ip6_multiple_tables;
151
152 table = rtm_get_table(r, tb);
153
154 if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
155 return 0;
156
157 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
158 ip6_multiple_tables = 1;
159
160 if (filter.cloned == !(r->rtm_flags&RTM_F_CLONED))
161 return 0;
162
163 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
164 if (filter.tb) {
165 if (filter.tb == RT_TABLE_LOCAL) {
166 if (r->rtm_type != RTN_LOCAL)
167 return 0;
168 } else if (filter.tb == RT_TABLE_MAIN) {
169 if (r->rtm_type == RTN_LOCAL)
170 return 0;
171 } else {
172 return 0;
173 }
174 }
175 } else {
176 if (filter.tb > 0 && filter.tb != table)
177 return 0;
178 }
179 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
180 return 0;
181 if ((filter.scope^r->rtm_scope)&filter.scopemask)
182 return 0;
183
184 if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
185 return 0;
186 if ((filter.tos^r->rtm_tos)&filter.tosmask)
187 return 0;
188 if (filter.rdst.family &&
189 (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len))
190 return 0;
191 if (filter.mdst.family &&
192 (r->rtm_family != filter.mdst.family ||
193 (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len)))
194 return 0;
195 if (filter.rsrc.family &&
196 (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len))
197 return 0;
198 if (filter.msrc.family &&
199 (r->rtm_family != filter.msrc.family ||
200 (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len)))
201 return 0;
202 if (filter.rvia.family) {
203 int family = r->rtm_family;
204
205 if (tb[RTA_VIA]) {
206 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
207
208 family = via->rtvia_family;
209 }
210 if (family != filter.rvia.family)
211 return 0;
212 }
213 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
214 return 0;
215
216 if (tb[RTA_DST])
217 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
218 if (filter.rsrc.family || filter.msrc.family) {
219 if (tb[RTA_SRC])
220 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
221 }
222 if (filter.rvia.bitlen > 0) {
223 if (tb[RTA_GATEWAY])
224 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
225 if (tb[RTA_VIA]) {
226 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
227 struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
228
229 via.family = rtvia->rtvia_family;
230 memcpy(&via.data, rtvia->rtvia_addr, len);
231 }
232 }
233 if (filter.rprefsrc.bitlen > 0) {
234 if (tb[RTA_PREFSRC])
235 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
236 }
237
238 if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
239 return 0;
240 if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
241 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
242 return 0;
243
244 if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
245 return 0;
246 if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
247 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
248 return 0;
249
250 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
251 return 0;
252 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
253 return 0;
254 if (filter.realmmask) {
255 __u32 realms = 0;
256
257 if (tb[RTA_FLOW])
258 realms = rta_getattr_u32(tb[RTA_FLOW]);
259 if ((realms^filter.realm)&filter.realmmask)
260 return 0;
261 }
262 if (filter.iifmask) {
263 int iif = 0;
264
265 if (tb[RTA_IIF])
266 iif = rta_getattr_u32(tb[RTA_IIF]);
267 if ((iif^filter.iif)&filter.iifmask)
268 return 0;
269 }
270 if (filter.oifmask) {
271 int oif = 0;
272
273 if (tb[RTA_OIF])
274 oif = rta_getattr_u32(tb[RTA_OIF]);
275 if ((oif^filter.oif)&filter.oifmask)
276 return 0;
277 }
278 if (filter.markmask) {
279 int mark = 0;
280
281 if (tb[RTA_MARK])
282 mark = rta_getattr_u32(tb[RTA_MARK]);
283 if ((mark ^ filter.mark) & filter.markmask)
284 return 0;
285 }
286 if (filter.flushb &&
287 r->rtm_family == AF_INET6 &&
288 r->rtm_dst_len == 0 &&
289 r->rtm_type == RTN_UNREACHABLE &&
290 tb[RTA_PRIORITY] &&
291 rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
292 return 0;
293
294 return 1;
295 }
296
297 static void print_rtax_features(FILE *fp, unsigned int features)
298 {
299 unsigned int of = features;
300
301 if (features & RTAX_FEATURE_ECN) {
302 fprintf(fp, "ecn ");
303 features &= ~RTAX_FEATURE_ECN;
304 }
305
306 if (features)
307 fprintf(fp, "0x%x ", of);
308 }
309
310 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
311 {
312 FILE *fp = (FILE *)arg;
313 struct rtmsg *r = NLMSG_DATA(n);
314 int len = n->nlmsg_len;
315 struct rtattr *tb[RTA_MAX+1];
316 int host_len, family;
317 __u32 table;
318
319 SPRINT_BUF(b1);
320 static int hz;
321
322 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
323 fprintf(stderr, "Not a route: %08x %08x %08x\n",
324 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
325 return -1;
326 }
327 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
328 return 0;
329 len -= NLMSG_LENGTH(sizeof(*r));
330 if (len < 0) {
331 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
332 return -1;
333 }
334
335 host_len = af_bit_len(r->rtm_family);
336
337 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
338 table = rtm_get_table(r, tb);
339
340 if (!filter_nlmsg(n, tb, host_len))
341 return 0;
342
343 if (filter.flushb) {
344 struct nlmsghdr *fn;
345
346 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
347 if (flush_update())
348 return -1;
349 }
350 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
351 memcpy(fn, n, n->nlmsg_len);
352 fn->nlmsg_type = RTM_DELROUTE;
353 fn->nlmsg_flags = NLM_F_REQUEST;
354 fn->nlmsg_seq = ++rth.seq;
355 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
356 filter.flushed++;
357 if (show_stats < 2)
358 return 0;
359 }
360
361 if (n->nlmsg_type == RTM_DELROUTE)
362 fprintf(fp, "Deleted ");
363 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
364 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
365 fprintf(fp, "%s ", rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
366
367 if (tb[RTA_DST]) {
368 family = get_real_family(r->rtm_type, r->rtm_family);
369 if (r->rtm_dst_len != host_len) {
370 fprintf(fp, "%s/%u ",
371 rt_addr_n2a_rta(family, tb[RTA_DST]),
372 r->rtm_dst_len);
373 } else {
374 fprintf(fp, "%s ",
375 format_host_rta(family, tb[RTA_DST]));
376 }
377 } else if (r->rtm_dst_len) {
378 fprintf(fp, "0/%d ", r->rtm_dst_len);
379 } else {
380 fprintf(fp, "default ");
381 }
382 if (tb[RTA_SRC]) {
383 family = get_real_family(r->rtm_type, r->rtm_family);
384 if (r->rtm_src_len != host_len) {
385 fprintf(fp, "from %s/%u ",
386 rt_addr_n2a_rta(family, tb[RTA_SRC]),
387 r->rtm_src_len);
388 } else {
389 fprintf(fp, "from %s ",
390 format_host_rta(family, tb[RTA_SRC]));
391 }
392 } else if (r->rtm_src_len) {
393 fprintf(fp, "from 0/%u ", r->rtm_src_len);
394 }
395 if (tb[RTA_NEWDST]) {
396 fprintf(fp, "as to %s ",
397 format_host_rta(r->rtm_family, tb[RTA_NEWDST]));
398 }
399
400 if (tb[RTA_ENCAP])
401 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
402
403 if (r->rtm_tos && filter.tosmask != -1) {
404 SPRINT_BUF(b1);
405 fprintf(fp, "tos %s ", rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
406 }
407
408 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len) {
409 fprintf(fp, "via %s ",
410 format_host_rta(r->rtm_family, tb[RTA_GATEWAY]));
411 }
412 if (tb[RTA_VIA]) {
413 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
414 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
415
416 fprintf(fp, "via %s %s ",
417 family_name(via->rtvia_family),
418 format_host(via->rtvia_family, len, via->rtvia_addr));
419 }
420 if (tb[RTA_OIF] && filter.oifmask != -1)
421 fprintf(fp, "dev %s ", ll_index_to_name(rta_getattr_u32(tb[RTA_OIF])));
422
423 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
424 fprintf(fp, "table %s ", rtnl_rttable_n2a(table, b1, sizeof(b1)));
425 if (!(r->rtm_flags&RTM_F_CLONED)) {
426 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) && filter.protocolmask != -1)
427 fprintf(fp, "proto %s ", rtnl_rtprot_n2a(r->rtm_protocol, b1, sizeof(b1)));
428 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) && filter.scopemask != -1)
429 fprintf(fp, "scope %s ", rtnl_rtscope_n2a(r->rtm_scope, b1, sizeof(b1)));
430 }
431 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
432 /* Do not use format_host(). It is our local addr
433 and symbolic name will not be useful.
434 */
435 fprintf(fp, "src %s ",
436 rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]));
437 }
438 if (tb[RTA_PRIORITY])
439 fprintf(fp, "metric %u ", rta_getattr_u32(tb[RTA_PRIORITY]));
440 if (r->rtm_flags & RTNH_F_DEAD)
441 fprintf(fp, "dead ");
442 if (r->rtm_flags & RTNH_F_ONLINK)
443 fprintf(fp, "onlink ");
444 if (r->rtm_flags & RTNH_F_PERVASIVE)
445 fprintf(fp, "pervasive ");
446 if (r->rtm_flags & RTNH_F_OFFLOAD)
447 fprintf(fp, "offload ");
448 if (r->rtm_flags & RTM_F_NOTIFY)
449 fprintf(fp, "notify ");
450 if (r->rtm_flags & RTNH_F_LINKDOWN)
451 fprintf(fp, "linkdown ");
452 if (r->rtm_flags & RTNH_F_UNRESOLVED)
453 fprintf(fp, "unresolved ");
454 if (tb[RTA_MARK]) {
455 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
456
457 if (mark) {
458 if (mark >= 16)
459 fprintf(fp, "mark 0x%x ", mark);
460 else
461 fprintf(fp, "mark %u ", mark);
462 }
463 }
464
465 if (tb[RTA_FLOW] && filter.realmmask != ~0U) {
466 __u32 to = rta_getattr_u32(tb[RTA_FLOW]);
467 __u32 from = to>>16;
468
469 to &= 0xFFFF;
470 fprintf(fp, "realm%s ", from ? "s" : "");
471 if (from) {
472 fprintf(fp, "%s/",
473 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
474 }
475 fprintf(fp, "%s ",
476 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
477 }
478
479 if (tb[RTA_UID])
480 fprintf(fp, "uid %u ", rta_getattr_u32(tb[RTA_UID]));
481
482 if ((r->rtm_flags&RTM_F_CLONED) && r->rtm_family == AF_INET) {
483 __u32 flags = r->rtm_flags&~0xFFFF;
484 int first = 1;
485
486 fprintf(fp, "%s cache ", _SL_);
487
488 #define PRTFL(fl, flname) if (flags&RTCF_##fl) { \
489 flags &= ~RTCF_##fl; \
490 fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
491 first = 0; }
492 PRTFL(LOCAL, "local");
493 PRTFL(REJECT, "reject");
494 PRTFL(MULTICAST, "mc");
495 PRTFL(BROADCAST, "brd");
496 PRTFL(DNAT, "dst-nat");
497 PRTFL(SNAT, "src-nat");
498 PRTFL(MASQ, "masq");
499 PRTFL(DIRECTDST, "dst-direct");
500 PRTFL(DIRECTSRC, "src-direct");
501 PRTFL(REDIRECTED, "redirected");
502 PRTFL(DOREDIRECT, "redirect");
503 PRTFL(FAST, "fastroute");
504 PRTFL(NOTIFY, "notify");
505 PRTFL(TPROXY, "proxy");
506
507 if (flags)
508 fprintf(fp, "%s%x> ", first ? "<" : "", flags);
509 if (tb[RTA_CACHEINFO]) {
510 struct rta_cacheinfo *ci = RTA_DATA(tb[RTA_CACHEINFO]);
511
512 if (!hz)
513 hz = get_user_hz();
514 if (ci->rta_expires != 0)
515 fprintf(fp, "expires %dsec ", ci->rta_expires/hz);
516 if (ci->rta_error != 0)
517 fprintf(fp, "error %d ", ci->rta_error);
518 if (show_stats) {
519 if (ci->rta_clntref)
520 fprintf(fp, "users %d ", ci->rta_clntref);
521 if (ci->rta_used != 0)
522 fprintf(fp, "used %d ", ci->rta_used);
523 if (ci->rta_lastuse != 0)
524 fprintf(fp, "age %dsec ", ci->rta_lastuse/hz);
525 }
526 if (ci->rta_id)
527 fprintf(fp, "ipid 0x%04x ", ci->rta_id);
528 if (ci->rta_ts || ci->rta_tsage)
529 fprintf(fp, "ts 0x%x tsage %dsec ",
530 ci->rta_ts, ci->rta_tsage);
531 }
532 } else if (r->rtm_family == AF_INET6) {
533 struct rta_cacheinfo *ci = NULL;
534
535 if (tb[RTA_CACHEINFO])
536 ci = RTA_DATA(tb[RTA_CACHEINFO]);
537 if ((r->rtm_flags & RTM_F_CLONED) || (ci && ci->rta_expires)) {
538 if (!hz)
539 hz = get_user_hz();
540 if (r->rtm_flags & RTM_F_CLONED)
541 fprintf(fp, "%s cache ", _SL_);
542 if (ci->rta_expires)
543 fprintf(fp, "expires %dsec ", ci->rta_expires/hz);
544 if (ci->rta_error != 0)
545 fprintf(fp, "error %d ", ci->rta_error);
546 if (show_stats) {
547 if (ci->rta_clntref)
548 fprintf(fp, "users %d ", ci->rta_clntref);
549 if (ci->rta_used != 0)
550 fprintf(fp, "used %d ", ci->rta_used);
551 if (ci->rta_lastuse != 0)
552 fprintf(fp, "age %dsec ", ci->rta_lastuse/hz);
553 }
554 } else if (ci) {
555 if (ci->rta_error != 0)
556 fprintf(fp, "error %d ", ci->rta_error);
557 }
558 }
559 if (tb[RTA_METRICS]) {
560 int i;
561 unsigned int mxlock = 0;
562 struct rtattr *mxrta[RTAX_MAX+1];
563
564 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(tb[RTA_METRICS]),
565 RTA_PAYLOAD(tb[RTA_METRICS]));
566 if (mxrta[RTAX_LOCK])
567 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
568
569 for (i = 2; i <= RTAX_MAX; i++) {
570 __u32 val = 0U;
571
572 if (mxrta[i] == NULL)
573 continue;
574
575 if (i != RTAX_CC_ALGO)
576 val = rta_getattr_u32(mxrta[i]);
577
578 if (i == RTAX_HOPLIMIT && (int)val == -1)
579 continue;
580
581 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
582 fprintf(fp, "%s ", mx_names[i]);
583 else
584 fprintf(fp, "metric %d ", i);
585
586 if (mxlock & (1<<i))
587 fprintf(fp, "lock ");
588
589 switch (i) {
590 case RTAX_FEATURES:
591 print_rtax_features(fp, val);
592 break;
593 default:
594 fprintf(fp, "%u ", val);
595 break;
596
597 case RTAX_RTT:
598 case RTAX_RTTVAR:
599 case RTAX_RTO_MIN:
600 if (i == RTAX_RTT)
601 val /= 8;
602 else if (i == RTAX_RTTVAR)
603 val /= 4;
604
605 if (val >= 1000)
606 fprintf(fp, "%gs ", val/1e3);
607 else
608 fprintf(fp, "%ums ", val);
609 break;
610 case RTAX_CC_ALGO:
611 fprintf(fp, "%s ", rta_getattr_str(mxrta[i]));
612 break;
613 }
614 }
615 }
616 if (tb[RTA_IIF] && filter.iifmask != -1) {
617 fprintf(fp, "iif %s ",
618 ll_index_to_name(rta_getattr_u32(tb[RTA_IIF])));
619 }
620 if (tb[RTA_MULTIPATH]) {
621 struct rtnexthop *nh = RTA_DATA(tb[RTA_MULTIPATH]);
622 int first = 0;
623
624 len = RTA_PAYLOAD(tb[RTA_MULTIPATH]);
625
626 for (;;) {
627 if (len < sizeof(*nh))
628 break;
629 if (nh->rtnh_len > len)
630 break;
631 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
632 if (first)
633 fprintf(fp, "Oifs: ");
634 else
635 fprintf(fp, " ");
636 } else
637 fprintf(fp, "%s\tnexthop ", _SL_);
638 if (nh->rtnh_len > sizeof(*nh)) {
639 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh), nh->rtnh_len - sizeof(*nh));
640
641 if (tb[RTA_ENCAP])
642 lwt_print_encap(fp,
643 tb[RTA_ENCAP_TYPE],
644 tb[RTA_ENCAP]);
645 if (tb[RTA_NEWDST]) {
646 fprintf(fp, "as to %s ",
647 format_host_rta(r->rtm_family,
648 tb[RTA_NEWDST]));
649 }
650 if (tb[RTA_GATEWAY]) {
651 fprintf(fp, "via %s ",
652 format_host_rta(r->rtm_family,
653 tb[RTA_GATEWAY]));
654 }
655 if (tb[RTA_VIA]) {
656 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
657 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
658
659 fprintf(fp, "via %s %s ",
660 family_name(via->rtvia_family),
661 format_host(via->rtvia_family, len, via->rtvia_addr));
662 }
663 if (tb[RTA_FLOW]) {
664 __u32 to = rta_getattr_u32(tb[RTA_FLOW]);
665 __u32 from = to>>16;
666
667 to &= 0xFFFF;
668 fprintf(fp, "realm%s ", from ? "s" : "");
669 if (from) {
670 fprintf(fp, "%s/",
671 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
672 }
673 fprintf(fp, "%s ",
674 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
675 }
676 }
677 if (r->rtm_flags&RTM_F_CLONED && r->rtm_type == RTN_MULTICAST) {
678 fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
679 if (nh->rtnh_hops != 1)
680 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
681 fprintf(fp, " ");
682 } else {
683 fprintf(fp, "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
684 if (r->rtm_family != AF_MPLS)
685 fprintf(fp, "weight %d ",
686 nh->rtnh_hops+1);
687 }
688 if (nh->rtnh_flags & RTNH_F_DEAD)
689 fprintf(fp, "dead ");
690 if (nh->rtnh_flags & RTNH_F_ONLINK)
691 fprintf(fp, "onlink ");
692 if (nh->rtnh_flags & RTNH_F_PERVASIVE)
693 fprintf(fp, "pervasive ");
694 if (nh->rtnh_flags & RTNH_F_LINKDOWN)
695 fprintf(fp, "linkdown ");
696 len -= NLMSG_ALIGN(nh->rtnh_len);
697 nh = RTNH_NEXT(nh);
698 }
699 }
700 if (tb[RTA_PREF]) {
701 unsigned int pref = rta_getattr_u8(tb[RTA_PREF]);
702
703 fprintf(fp, "pref ");
704
705 switch (pref) {
706 case ICMPV6_ROUTER_PREF_LOW:
707 fprintf(fp, "low");
708 break;
709 case ICMPV6_ROUTER_PREF_MEDIUM:
710 fprintf(fp, "medium");
711 break;
712 case ICMPV6_ROUTER_PREF_HIGH:
713 fprintf(fp, "high");
714 break;
715 default:
716 fprintf(fp, "%u", pref);
717 }
718 }
719 if (tb[RTA_TTL_PROPAGATE]) {
720 fprintf(fp, "ttl-propagate ");
721 if (rta_getattr_u8(tb[RTA_TTL_PROPAGATE]))
722 fprintf(fp, "enabled");
723 else
724 fprintf(fp, "disabled");
725 }
726 fprintf(fp, "\n");
727 fflush(fp);
728 return 0;
729 }
730
731 static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
732 struct rtattr *rta, struct rtnexthop *rtnh,
733 int *argcp, char ***argvp)
734 {
735 int argc = *argcp;
736 char **argv = *argvp;
737
738 while (++argv, --argc > 0) {
739 if (strcmp(*argv, "via") == 0) {
740 inet_prefix addr;
741 int family;
742
743 NEXT_ARG();
744 family = read_family(*argv);
745 if (family == AF_UNSPEC)
746 family = r->rtm_family;
747 else
748 NEXT_ARG();
749 get_addr(&addr, *argv, family);
750 if (r->rtm_family == AF_UNSPEC)
751 r->rtm_family = addr.family;
752 if (addr.family == r->rtm_family) {
753 rta_addattr_l(rta, 4096, RTA_GATEWAY, &addr.data, addr.bytelen);
754 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
755 } else {
756 rta_addattr_l(rta, 4096, RTA_VIA, &addr.family, addr.bytelen+2);
757 rtnh->rtnh_len += RTA_SPACE(addr.bytelen+2);
758 }
759 } else if (strcmp(*argv, "dev") == 0) {
760 NEXT_ARG();
761 if ((rtnh->rtnh_ifindex = ll_name_to_index(*argv)) == 0) {
762 fprintf(stderr, "Cannot find device \"%s\"\n", *argv);
763 exit(1);
764 }
765 } else if (strcmp(*argv, "weight") == 0) {
766 unsigned int w;
767
768 NEXT_ARG();
769 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
770 invarg("\"weight\" is invalid\n", *argv);
771 rtnh->rtnh_hops = w - 1;
772 } else if (strcmp(*argv, "onlink") == 0) {
773 rtnh->rtnh_flags |= RTNH_F_ONLINK;
774 } else if (matches(*argv, "realms") == 0) {
775 __u32 realm;
776
777 NEXT_ARG();
778 if (get_rt_realms_or_raw(&realm, *argv))
779 invarg("\"realm\" value is invalid\n", *argv);
780 rta_addattr32(rta, 4096, RTA_FLOW, realm);
781 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
782 } else if (strcmp(*argv, "encap") == 0) {
783 int len = rta->rta_len;
784
785 lwt_parse_encap(rta, 4096, &argc, &argv);
786 rtnh->rtnh_len += rta->rta_len - len;
787 } else if (strcmp(*argv, "as") == 0) {
788 inet_prefix addr;
789
790 NEXT_ARG();
791 if (strcmp(*argv, "to") == 0)
792 NEXT_ARG();
793 get_addr(&addr, *argv, r->rtm_family);
794 rta_addattr_l(rta, 4096, RTA_NEWDST, &addr.data,
795 addr.bytelen);
796 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
797 } else
798 break;
799 }
800 *argcp = argc;
801 *argvp = argv;
802 return 0;
803 }
804
805 static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
806 int argc, char **argv)
807 {
808 char buf[1024];
809 struct rtattr *rta = (void *)buf;
810 struct rtnexthop *rtnh;
811
812 rta->rta_type = RTA_MULTIPATH;
813 rta->rta_len = RTA_LENGTH(0);
814 rtnh = RTA_DATA(rta);
815
816 while (argc > 0) {
817 if (strcmp(*argv, "nexthop") != 0) {
818 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
819 exit(-1);
820 }
821 if (argc <= 1) {
822 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
823 exit(-1);
824 }
825 memset(rtnh, 0, sizeof(*rtnh));
826 rtnh->rtnh_len = sizeof(*rtnh);
827 rta->rta_len += rtnh->rtnh_len;
828 parse_one_nh(n, r, rta, rtnh, &argc, &argv);
829 rtnh = RTNH_NEXT(rtnh);
830 }
831
832 if (rta->rta_len > RTA_LENGTH(0))
833 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
834 return 0;
835 }
836
837 static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
838 {
839 struct {
840 struct nlmsghdr n;
841 struct rtmsg r;
842 char buf[1024];
843 } req = {
844 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
845 .n.nlmsg_flags = NLM_F_REQUEST | flags,
846 .n.nlmsg_type = cmd,
847 .r.rtm_family = preferred_family,
848 .r.rtm_table = RT_TABLE_MAIN,
849 .r.rtm_scope = RT_SCOPE_NOWHERE,
850 };
851 char mxbuf[256];
852 struct rtattr *mxrta = (void *)mxbuf;
853 unsigned int mxlock = 0;
854 char *d = NULL;
855 int gw_ok = 0;
856 int dst_ok = 0;
857 int nhs_ok = 0;
858 int scope_ok = 0;
859 int table_ok = 0;
860 int raw = 0;
861 int type_ok = 0;
862
863 if (cmd != RTM_DELROUTE) {
864 req.r.rtm_protocol = RTPROT_BOOT;
865 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
866 req.r.rtm_type = RTN_UNICAST;
867 }
868
869 mxrta->rta_type = RTA_METRICS;
870 mxrta->rta_len = RTA_LENGTH(0);
871
872 while (argc > 0) {
873 if (strcmp(*argv, "src") == 0) {
874 inet_prefix addr;
875
876 NEXT_ARG();
877 get_addr(&addr, *argv, req.r.rtm_family);
878 if (req.r.rtm_family == AF_UNSPEC)
879 req.r.rtm_family = addr.family;
880 addattr_l(&req.n, sizeof(req), RTA_PREFSRC, &addr.data, addr.bytelen);
881 } else if (strcmp(*argv, "as") == 0) {
882 inet_prefix addr;
883
884 NEXT_ARG();
885 if (strcmp(*argv, "to") == 0) {
886 NEXT_ARG();
887 }
888 get_addr(&addr, *argv, req.r.rtm_family);
889 if (req.r.rtm_family == AF_UNSPEC)
890 req.r.rtm_family = addr.family;
891 addattr_l(&req.n, sizeof(req), RTA_NEWDST, &addr.data, addr.bytelen);
892 } else if (strcmp(*argv, "via") == 0) {
893 inet_prefix addr;
894 int family;
895
896 if (gw_ok) {
897 invarg("use nexthop syntax to specify multiple via\n",
898 *argv);
899 }
900 gw_ok = 1;
901 NEXT_ARG();
902 family = read_family(*argv);
903 if (family == AF_UNSPEC)
904 family = req.r.rtm_family;
905 else
906 NEXT_ARG();
907 get_addr(&addr, *argv, family);
908 if (req.r.rtm_family == AF_UNSPEC)
909 req.r.rtm_family = addr.family;
910 if (addr.family == req.r.rtm_family)
911 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
912 &addr.data, addr.bytelen);
913 else
914 addattr_l(&req.n, sizeof(req), RTA_VIA,
915 &addr.family, addr.bytelen+2);
916 } else if (strcmp(*argv, "from") == 0) {
917 inet_prefix addr;
918
919 NEXT_ARG();
920 get_prefix(&addr, *argv, req.r.rtm_family);
921 if (req.r.rtm_family == AF_UNSPEC)
922 req.r.rtm_family = addr.family;
923 if (addr.bytelen)
924 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
925 req.r.rtm_src_len = addr.bitlen;
926 } else if (strcmp(*argv, "tos") == 0 ||
927 matches(*argv, "dsfield") == 0) {
928 __u32 tos;
929
930 NEXT_ARG();
931 if (rtnl_dsfield_a2n(&tos, *argv))
932 invarg("\"tos\" value is invalid\n", *argv);
933 req.r.rtm_tos = tos;
934 } else if (strcmp(*argv, "expires") == 0) {
935 __u32 expires;
936
937 NEXT_ARG();
938 if (get_u32(&expires, *argv, 0))
939 invarg("\"expires\" value is invalid\n", *argv);
940 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
941 } else if (matches(*argv, "metric") == 0 ||
942 matches(*argv, "priority") == 0 ||
943 strcmp(*argv, "preference") == 0) {
944 __u32 metric;
945
946 NEXT_ARG();
947 if (get_u32(&metric, *argv, 0))
948 invarg("\"metric\" value is invalid\n", *argv);
949 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
950 } else if (strcmp(*argv, "scope") == 0) {
951 __u32 scope = 0;
952
953 NEXT_ARG();
954 if (rtnl_rtscope_a2n(&scope, *argv))
955 invarg("invalid \"scope\" value\n", *argv);
956 req.r.rtm_scope = scope;
957 scope_ok = 1;
958 } else if (strcmp(*argv, "mtu") == 0) {
959 unsigned int mtu;
960
961 NEXT_ARG();
962 if (strcmp(*argv, "lock") == 0) {
963 mxlock |= (1<<RTAX_MTU);
964 NEXT_ARG();
965 }
966 if (get_unsigned(&mtu, *argv, 0))
967 invarg("\"mtu\" value is invalid\n", *argv);
968 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
969 } else if (strcmp(*argv, "hoplimit") == 0) {
970 unsigned int hoplimit;
971
972 NEXT_ARG();
973 if (strcmp(*argv, "lock") == 0) {
974 mxlock |= (1<<RTAX_HOPLIMIT);
975 NEXT_ARG();
976 }
977 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
978 invarg("\"hoplimit\" value is invalid\n", *argv);
979 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
980 } else if (strcmp(*argv, "advmss") == 0) {
981 unsigned int mss;
982
983 NEXT_ARG();
984 if (strcmp(*argv, "lock") == 0) {
985 mxlock |= (1<<RTAX_ADVMSS);
986 NEXT_ARG();
987 }
988 if (get_unsigned(&mss, *argv, 0))
989 invarg("\"mss\" value is invalid\n", *argv);
990 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
991 } else if (matches(*argv, "reordering") == 0) {
992 unsigned int reord;
993
994 NEXT_ARG();
995 if (strcmp(*argv, "lock") == 0) {
996 mxlock |= (1<<RTAX_REORDERING);
997 NEXT_ARG();
998 }
999 if (get_unsigned(&reord, *argv, 0))
1000 invarg("\"reordering\" value is invalid\n", *argv);
1001 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1002 } else if (strcmp(*argv, "rtt") == 0) {
1003 unsigned int rtt;
1004
1005 NEXT_ARG();
1006 if (strcmp(*argv, "lock") == 0) {
1007 mxlock |= (1<<RTAX_RTT);
1008 NEXT_ARG();
1009 }
1010 if (get_time_rtt(&rtt, *argv, &raw))
1011 invarg("\"rtt\" value is invalid\n", *argv);
1012 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1013 (raw) ? rtt : rtt * 8);
1014 } else if (strcmp(*argv, "rto_min") == 0) {
1015 unsigned int rto_min;
1016
1017 NEXT_ARG();
1018 mxlock |= (1<<RTAX_RTO_MIN);
1019 if (get_time_rtt(&rto_min, *argv, &raw))
1020 invarg("\"rto_min\" value is invalid\n",
1021 *argv);
1022 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1023 rto_min);
1024 } else if (matches(*argv, "window") == 0) {
1025 unsigned int win;
1026
1027 NEXT_ARG();
1028 if (strcmp(*argv, "lock") == 0) {
1029 mxlock |= (1<<RTAX_WINDOW);
1030 NEXT_ARG();
1031 }
1032 if (get_unsigned(&win, *argv, 0))
1033 invarg("\"window\" value is invalid\n", *argv);
1034 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1035 } else if (matches(*argv, "cwnd") == 0) {
1036 unsigned int win;
1037
1038 NEXT_ARG();
1039 if (strcmp(*argv, "lock") == 0) {
1040 mxlock |= (1<<RTAX_CWND);
1041 NEXT_ARG();
1042 }
1043 if (get_unsigned(&win, *argv, 0))
1044 invarg("\"cwnd\" value is invalid\n", *argv);
1045 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1046 } else if (matches(*argv, "initcwnd") == 0) {
1047 unsigned int win;
1048
1049 NEXT_ARG();
1050 if (strcmp(*argv, "lock") == 0) {
1051 mxlock |= (1<<RTAX_INITCWND);
1052 NEXT_ARG();
1053 }
1054 if (get_unsigned(&win, *argv, 0))
1055 invarg("\"initcwnd\" value is invalid\n", *argv);
1056 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITCWND, win);
1057 } else if (matches(*argv, "initrwnd") == 0) {
1058 unsigned int win;
1059
1060 NEXT_ARG();
1061 if (strcmp(*argv, "lock") == 0) {
1062 mxlock |= (1<<RTAX_INITRWND);
1063 NEXT_ARG();
1064 }
1065 if (get_unsigned(&win, *argv, 0))
1066 invarg("\"initrwnd\" value is invalid\n", *argv);
1067 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITRWND, win);
1068 } else if (matches(*argv, "features") == 0) {
1069 unsigned int features = 0;
1070
1071 while (argc > 0) {
1072 NEXT_ARG();
1073
1074 if (strcmp(*argv, "ecn") == 0)
1075 features |= RTAX_FEATURE_ECN;
1076 else
1077 invarg("\"features\" value not valid\n", *argv);
1078 break;
1079 }
1080
1081 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FEATURES, features);
1082 } else if (matches(*argv, "quickack") == 0) {
1083 unsigned int quickack;
1084
1085 NEXT_ARG();
1086 if (get_unsigned(&quickack, *argv, 0))
1087 invarg("\"quickack\" value is invalid\n", *argv);
1088 if (quickack != 1 && quickack != 0)
1089 invarg("\"quickack\" value should be 0 or 1\n", *argv);
1090 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_QUICKACK, quickack);
1091 } else if (matches(*argv, "congctl") == 0) {
1092 NEXT_ARG();
1093 if (strcmp(*argv, "lock") == 0) {
1094 mxlock |= 1 << RTAX_CC_ALGO;
1095 NEXT_ARG();
1096 }
1097 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1098 strlen(*argv));
1099 } else if (matches(*argv, "rttvar") == 0) {
1100 unsigned int win;
1101
1102 NEXT_ARG();
1103 if (strcmp(*argv, "lock") == 0) {
1104 mxlock |= (1<<RTAX_RTTVAR);
1105 NEXT_ARG();
1106 }
1107 if (get_time_rtt(&win, *argv, &raw))
1108 invarg("\"rttvar\" value is invalid\n", *argv);
1109 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1110 (raw) ? win : win * 4);
1111 } else if (matches(*argv, "ssthresh") == 0) {
1112 unsigned int win;
1113
1114 NEXT_ARG();
1115 if (strcmp(*argv, "lock") == 0) {
1116 mxlock |= (1<<RTAX_SSTHRESH);
1117 NEXT_ARG();
1118 }
1119 if (get_unsigned(&win, *argv, 0))
1120 invarg("\"ssthresh\" value is invalid\n", *argv);
1121 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1122 } else if (matches(*argv, "realms") == 0) {
1123 __u32 realm;
1124
1125 NEXT_ARG();
1126 if (get_rt_realms_or_raw(&realm, *argv))
1127 invarg("\"realm\" value is invalid\n", *argv);
1128 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1129 } else if (strcmp(*argv, "onlink") == 0) {
1130 req.r.rtm_flags |= RTNH_F_ONLINK;
1131 } else if (strcmp(*argv, "nexthop") == 0) {
1132 nhs_ok = 1;
1133 break;
1134 } else if (matches(*argv, "protocol") == 0) {
1135 __u32 prot;
1136
1137 NEXT_ARG();
1138 if (rtnl_rtprot_a2n(&prot, *argv))
1139 invarg("\"protocol\" value is invalid\n", *argv);
1140 req.r.rtm_protocol = prot;
1141 } else if (matches(*argv, "table") == 0) {
1142 __u32 tid;
1143
1144 NEXT_ARG();
1145 if (rtnl_rttable_a2n(&tid, *argv))
1146 invarg("\"table\" value is invalid\n", *argv);
1147 if (tid < 256)
1148 req.r.rtm_table = tid;
1149 else {
1150 req.r.rtm_table = RT_TABLE_UNSPEC;
1151 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1152 }
1153 table_ok = 1;
1154 } else if (matches(*argv, "vrf") == 0) {
1155 __u32 tid;
1156
1157 NEXT_ARG();
1158 tid = ipvrf_get_table(*argv);
1159 if (tid == 0)
1160 invarg("Invalid VRF\n", *argv);
1161 if (tid < 256)
1162 req.r.rtm_table = tid;
1163 else {
1164 req.r.rtm_table = RT_TABLE_UNSPEC;
1165 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1166 }
1167 table_ok = 1;
1168 } else if (strcmp(*argv, "dev") == 0 ||
1169 strcmp(*argv, "oif") == 0) {
1170 NEXT_ARG();
1171 d = *argv;
1172 } else if (matches(*argv, "pref") == 0) {
1173 __u8 pref;
1174
1175 NEXT_ARG();
1176 if (strcmp(*argv, "low") == 0)
1177 pref = ICMPV6_ROUTER_PREF_LOW;
1178 else if (strcmp(*argv, "medium") == 0)
1179 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1180 else if (strcmp(*argv, "high") == 0)
1181 pref = ICMPV6_ROUTER_PREF_HIGH;
1182 else if (get_u8(&pref, *argv, 0))
1183 invarg("\"pref\" value is invalid\n", *argv);
1184 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1185 } else if (strcmp(*argv, "encap") == 0) {
1186 char buf[1024];
1187 struct rtattr *rta = (void *)buf;
1188
1189 rta->rta_type = RTA_ENCAP;
1190 rta->rta_len = RTA_LENGTH(0);
1191
1192 lwt_parse_encap(rta, sizeof(buf), &argc, &argv);
1193
1194 if (rta->rta_len > RTA_LENGTH(0))
1195 addraw_l(&req.n, 1024, RTA_DATA(rta), RTA_PAYLOAD(rta));
1196 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1197 __u8 ttl_prop;
1198
1199 NEXT_ARG();
1200 if (matches(*argv, "enabled") == 0)
1201 ttl_prop = 1;
1202 else if (matches(*argv, "disabled") == 0)
1203 ttl_prop = 0;
1204 else
1205 invarg("\"ttl-propagate\" value is invalid\n",
1206 *argv);
1207
1208 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1209 ttl_prop);
1210 } else {
1211 int type;
1212 inet_prefix dst;
1213
1214 if (strcmp(*argv, "to") == 0) {
1215 NEXT_ARG();
1216 }
1217 if ((**argv < '0' || **argv > '9') &&
1218 rtnl_rtntype_a2n(&type, *argv) == 0) {
1219 NEXT_ARG();
1220 req.r.rtm_type = type;
1221 type_ok = 1;
1222 }
1223
1224 if (matches(*argv, "help") == 0)
1225 usage();
1226 if (dst_ok)
1227 duparg2("to", *argv);
1228 get_prefix(&dst, *argv, req.r.rtm_family);
1229 if (req.r.rtm_family == AF_UNSPEC)
1230 req.r.rtm_family = dst.family;
1231 req.r.rtm_dst_len = dst.bitlen;
1232 dst_ok = 1;
1233 if (dst.bytelen)
1234 addattr_l(&req.n, sizeof(req), RTA_DST, &dst.data, dst.bytelen);
1235 }
1236 argc--; argv++;
1237 }
1238
1239 if (!dst_ok)
1240 usage();
1241
1242 if (d || nhs_ok) {
1243 int idx;
1244
1245 if (d) {
1246 if ((idx = ll_name_to_index(d)) == 0) {
1247 fprintf(stderr, "Cannot find device \"%s\"\n", d);
1248 return -1;
1249 }
1250 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1251 }
1252 }
1253
1254 if (mxrta->rta_len > RTA_LENGTH(0)) {
1255 if (mxlock)
1256 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1257 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1258 }
1259
1260 if (nhs_ok)
1261 parse_nexthops(&req.n, &req.r, argc, argv);
1262
1263 if (req.r.rtm_family == AF_UNSPEC)
1264 req.r.rtm_family = AF_INET;
1265
1266 if (!table_ok) {
1267 if (req.r.rtm_type == RTN_LOCAL ||
1268 req.r.rtm_type == RTN_BROADCAST ||
1269 req.r.rtm_type == RTN_NAT ||
1270 req.r.rtm_type == RTN_ANYCAST)
1271 req.r.rtm_table = RT_TABLE_LOCAL;
1272 }
1273 if (!scope_ok) {
1274 if (req.r.rtm_family == AF_INET6 ||
1275 req.r.rtm_family == AF_MPLS)
1276 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1277 else if (req.r.rtm_type == RTN_LOCAL ||
1278 req.r.rtm_type == RTN_NAT)
1279 req.r.rtm_scope = RT_SCOPE_HOST;
1280 else if (req.r.rtm_type == RTN_BROADCAST ||
1281 req.r.rtm_type == RTN_MULTICAST ||
1282 req.r.rtm_type == RTN_ANYCAST)
1283 req.r.rtm_scope = RT_SCOPE_LINK;
1284 else if (req.r.rtm_type == RTN_UNICAST ||
1285 req.r.rtm_type == RTN_UNSPEC) {
1286 if (cmd == RTM_DELROUTE)
1287 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1288 else if (!gw_ok && !nhs_ok)
1289 req.r.rtm_scope = RT_SCOPE_LINK;
1290 }
1291 }
1292
1293 if (!type_ok && req.r.rtm_family == AF_MPLS)
1294 req.r.rtm_type = RTN_UNICAST;
1295
1296 if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
1297 return -2;
1298
1299 return 0;
1300 }
1301
1302 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
1303 {
1304 struct {
1305 struct nlmsghdr nlh;
1306 struct rtmsg rtm;
1307 } req = {
1308 .nlh.nlmsg_len = sizeof(req),
1309 .nlh.nlmsg_type = RTM_GETROUTE,
1310 .nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST,
1311 .nlh.nlmsg_seq = rth->dump = ++rth->seq,
1312 .rtm.rtm_family = family,
1313 .rtm.rtm_flags = RTM_F_CLONED,
1314 };
1315 struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
1316
1317 return sendto(rth->fd, (void *)&req, sizeof(req), 0, (struct sockaddr *)&nladdr, sizeof(nladdr));
1318 }
1319
1320 static int iproute_flush_cache(void)
1321 {
1322 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1323
1324 int len;
1325 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1326 char *buffer = "-1";
1327
1328 if (flush_fd < 0) {
1329 fprintf(stderr, "Cannot open \"%s\": %s\n",
1330 ROUTE_FLUSH_PATH, strerror(errno));
1331 return -1;
1332 }
1333
1334 len = strlen(buffer);
1335
1336 if ((write(flush_fd, (void *)buffer, len)) < len) {
1337 fprintf(stderr, "Cannot flush routing cache\n");
1338 close(flush_fd);
1339 return -1;
1340 }
1341 close(flush_fd);
1342 return 0;
1343 }
1344
1345 static __u32 route_dump_magic = 0x45311224;
1346
1347 static int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n,
1348 void *arg)
1349 {
1350 int ret;
1351 int len = n->nlmsg_len;
1352 struct rtmsg *r = NLMSG_DATA(n);
1353 struct rtattr *tb[RTA_MAX+1];
1354 int host_len;
1355
1356 host_len = af_bit_len(r->rtm_family);
1357 len -= NLMSG_LENGTH(sizeof(*r));
1358 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1359
1360 if (!filter_nlmsg(n, tb, host_len))
1361 return 0;
1362
1363 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1364 if ((ret > 0) && (ret != n->nlmsg_len)) {
1365 fprintf(stderr, "Short write while saving nlmsg\n");
1366 ret = -EIO;
1367 }
1368
1369 return ret == n->nlmsg_len ? 0 : ret;
1370 }
1371
1372 static int save_route_prep(void)
1373 {
1374 int ret;
1375
1376 if (isatty(STDOUT_FILENO)) {
1377 fprintf(stderr, "Not sending a binary stream to stdout\n");
1378 return -1;
1379 }
1380
1381 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1382 if (ret != sizeof(route_dump_magic)) {
1383 fprintf(stderr, "Can't write magic to dump file\n");
1384 return -1;
1385 }
1386
1387 return 0;
1388 }
1389
1390 static int iproute_list_flush_or_save(int argc, char **argv, int action)
1391 {
1392 int do_ipv6 = preferred_family;
1393 char *id = NULL;
1394 char *od = NULL;
1395 unsigned int mark = 0;
1396 rtnl_filter_t filter_fn;
1397
1398 if (action == IPROUTE_SAVE) {
1399 if (save_route_prep())
1400 return -1;
1401
1402 filter_fn = save_route;
1403 } else
1404 filter_fn = print_route;
1405
1406 iproute_reset_filter(0);
1407 filter.tb = RT_TABLE_MAIN;
1408
1409 if ((action == IPROUTE_FLUSH) && argc <= 0) {
1410 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1411 return -1;
1412 }
1413
1414 while (argc > 0) {
1415 if (matches(*argv, "table") == 0) {
1416 __u32 tid;
1417
1418 NEXT_ARG();
1419 if (rtnl_rttable_a2n(&tid, *argv)) {
1420 if (strcmp(*argv, "all") == 0) {
1421 filter.tb = 0;
1422 } else if (strcmp(*argv, "cache") == 0) {
1423 filter.cloned = 1;
1424 } else if (strcmp(*argv, "help") == 0) {
1425 usage();
1426 } else {
1427 invarg("table id value is invalid\n", *argv);
1428 }
1429 } else
1430 filter.tb = tid;
1431 } else if (matches(*argv, "vrf") == 0) {
1432 __u32 tid;
1433
1434 NEXT_ARG();
1435 tid = ipvrf_get_table(*argv);
1436 if (tid == 0)
1437 invarg("Invalid VRF\n", *argv);
1438 filter.tb = tid;
1439 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1440 } else if (matches(*argv, "cached") == 0 ||
1441 matches(*argv, "cloned") == 0) {
1442 filter.cloned = 1;
1443 } else if (strcmp(*argv, "tos") == 0 ||
1444 matches(*argv, "dsfield") == 0) {
1445 __u32 tos;
1446
1447 NEXT_ARG();
1448 if (rtnl_dsfield_a2n(&tos, *argv))
1449 invarg("TOS value is invalid\n", *argv);
1450 filter.tos = tos;
1451 filter.tosmask = -1;
1452 } else if (matches(*argv, "protocol") == 0) {
1453 __u32 prot = 0;
1454
1455 NEXT_ARG();
1456 filter.protocolmask = -1;
1457 if (rtnl_rtprot_a2n(&prot, *argv)) {
1458 if (strcmp(*argv, "all") != 0)
1459 invarg("invalid \"protocol\"\n", *argv);
1460 prot = 0;
1461 filter.protocolmask = 0;
1462 }
1463 filter.protocol = prot;
1464 } else if (matches(*argv, "scope") == 0) {
1465 __u32 scope = 0;
1466
1467 NEXT_ARG();
1468 filter.scopemask = -1;
1469 if (rtnl_rtscope_a2n(&scope, *argv)) {
1470 if (strcmp(*argv, "all") != 0)
1471 invarg("invalid \"scope\"\n", *argv);
1472 scope = RT_SCOPE_NOWHERE;
1473 filter.scopemask = 0;
1474 }
1475 filter.scope = scope;
1476 } else if (matches(*argv, "type") == 0) {
1477 int type;
1478
1479 NEXT_ARG();
1480 if (rtnl_rtntype_a2n(&type, *argv))
1481 invarg("node type value is invalid\n", *argv);
1482 filter.typemask = (1<<type);
1483 } else if (strcmp(*argv, "dev") == 0 ||
1484 strcmp(*argv, "oif") == 0) {
1485 NEXT_ARG();
1486 od = *argv;
1487 } else if (strcmp(*argv, "iif") == 0) {
1488 NEXT_ARG();
1489 id = *argv;
1490 } else if (strcmp(*argv, "mark") == 0) {
1491 NEXT_ARG();
1492 get_unsigned(&mark, *argv, 0);
1493 filter.markmask = -1;
1494 } else if (strcmp(*argv, "via") == 0) {
1495 int family;
1496
1497 NEXT_ARG();
1498 family = read_family(*argv);
1499 if (family == AF_UNSPEC)
1500 family = do_ipv6;
1501 else
1502 NEXT_ARG();
1503 get_prefix(&filter.rvia, *argv, family);
1504 } else if (strcmp(*argv, "src") == 0) {
1505 NEXT_ARG();
1506 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1507 } else if (matches(*argv, "realms") == 0) {
1508 __u32 realm;
1509
1510 NEXT_ARG();
1511 if (get_rt_realms_or_raw(&realm, *argv))
1512 invarg("invalid realms\n", *argv);
1513 filter.realm = realm;
1514 filter.realmmask = ~0U;
1515 if ((filter.realm&0xFFFF) == 0 &&
1516 (*argv)[strlen(*argv) - 1] == '/')
1517 filter.realmmask &= ~0xFFFF;
1518 if ((filter.realm&0xFFFF0000U) == 0 &&
1519 (strchr(*argv, '/') == NULL ||
1520 (*argv)[0] == '/'))
1521 filter.realmmask &= ~0xFFFF0000U;
1522 } else if (matches(*argv, "from") == 0) {
1523 NEXT_ARG();
1524 if (matches(*argv, "root") == 0) {
1525 NEXT_ARG();
1526 get_prefix(&filter.rsrc, *argv, do_ipv6);
1527 } else if (matches(*argv, "match") == 0) {
1528 NEXT_ARG();
1529 get_prefix(&filter.msrc, *argv, do_ipv6);
1530 } else {
1531 if (matches(*argv, "exact") == 0) {
1532 NEXT_ARG();
1533 }
1534 get_prefix(&filter.msrc, *argv, do_ipv6);
1535 filter.rsrc = filter.msrc;
1536 }
1537 } else {
1538 if (matches(*argv, "to") == 0) {
1539 NEXT_ARG();
1540 }
1541 if (matches(*argv, "root") == 0) {
1542 NEXT_ARG();
1543 get_prefix(&filter.rdst, *argv, do_ipv6);
1544 } else if (matches(*argv, "match") == 0) {
1545 NEXT_ARG();
1546 get_prefix(&filter.mdst, *argv, do_ipv6);
1547 } else {
1548 if (matches(*argv, "exact") == 0) {
1549 NEXT_ARG();
1550 }
1551 get_prefix(&filter.mdst, *argv, do_ipv6);
1552 filter.rdst = filter.mdst;
1553 }
1554 }
1555 argc--; argv++;
1556 }
1557
1558 if (do_ipv6 == AF_UNSPEC && filter.tb)
1559 do_ipv6 = AF_INET;
1560
1561 if (id || od) {
1562 int idx;
1563
1564 if (id) {
1565 if ((idx = ll_name_to_index(id)) == 0) {
1566 fprintf(stderr, "Cannot find device \"%s\"\n", id);
1567 return -1;
1568 }
1569 filter.iif = idx;
1570 filter.iifmask = -1;
1571 }
1572 if (od) {
1573 if ((idx = ll_name_to_index(od)) == 0) {
1574 fprintf(stderr, "Cannot find device \"%s\"\n", od);
1575 return -1;
1576 }
1577 filter.oif = idx;
1578 filter.oifmask = -1;
1579 }
1580 }
1581 filter.mark = mark;
1582
1583 if (action == IPROUTE_FLUSH) {
1584 int round = 0;
1585 char flushb[4096-512];
1586 time_t start = time(0);
1587
1588 if (filter.cloned) {
1589 if (do_ipv6 != AF_INET6) {
1590 iproute_flush_cache();
1591 if (show_stats)
1592 printf("*** IPv4 routing cache is flushed.\n");
1593 }
1594 if (do_ipv6 == AF_INET)
1595 return 0;
1596 }
1597
1598 filter.flushb = flushb;
1599 filter.flushp = 0;
1600 filter.flushe = sizeof(flushb);
1601
1602 for (;;) {
1603 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1604 perror("Cannot send dump request");
1605 exit(1);
1606 }
1607 filter.flushed = 0;
1608 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1609 fprintf(stderr, "Flush terminated\n");
1610 exit(1);
1611 }
1612 if (filter.flushed == 0) {
1613 if (show_stats) {
1614 if (round == 0 && (!filter.cloned || do_ipv6 == AF_INET6))
1615 printf("Nothing to flush.\n");
1616 else
1617 printf("*** Flush is complete after %d round%s ***\n", round, round > 1?"s":"");
1618 }
1619 fflush(stdout);
1620 return 0;
1621 }
1622 round++;
1623 if (flush_update() < 0)
1624 exit(1);
1625
1626 if (time(0) - start > 30) {
1627 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1628 (long)(time(0) - start), filter.flushed);
1629 exit(1);
1630 }
1631
1632 if (show_stats) {
1633 printf("\n*** Round %d, deleting %d entries ***\n", round, filter.flushed);
1634 fflush(stdout);
1635 }
1636 }
1637 }
1638
1639 if (!filter.cloned) {
1640 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1641 perror("Cannot send dump request");
1642 exit(1);
1643 }
1644 } else {
1645 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1646 perror("Cannot send dump request");
1647 exit(1);
1648 }
1649 }
1650
1651 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1652 fprintf(stderr, "Dump terminated\n");
1653 exit(1);
1654 }
1655
1656 exit(0);
1657 }
1658
1659
1660 static int iproute_get(int argc, char **argv)
1661 {
1662 struct {
1663 struct nlmsghdr n;
1664 struct rtmsg r;
1665 char buf[1024];
1666 } req = {
1667 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1668 .n.nlmsg_flags = NLM_F_REQUEST,
1669 .n.nlmsg_type = RTM_GETROUTE,
1670 .r.rtm_family = preferred_family,
1671 };
1672 char *idev = NULL;
1673 char *odev = NULL;
1674 int connected = 0;
1675 int from_ok = 0;
1676 unsigned int mark = 0;
1677
1678 iproute_reset_filter(0);
1679 filter.cloned = 2;
1680
1681 while (argc > 0) {
1682 if (strcmp(*argv, "tos") == 0 ||
1683 matches(*argv, "dsfield") == 0) {
1684 __u32 tos;
1685
1686 NEXT_ARG();
1687 if (rtnl_dsfield_a2n(&tos, *argv))
1688 invarg("TOS value is invalid\n", *argv);
1689 req.r.rtm_tos = tos;
1690 } else if (matches(*argv, "from") == 0) {
1691 inet_prefix addr;
1692
1693 NEXT_ARG();
1694 if (matches(*argv, "help") == 0)
1695 usage();
1696 from_ok = 1;
1697 get_prefix(&addr, *argv, req.r.rtm_family);
1698 if (req.r.rtm_family == AF_UNSPEC)
1699 req.r.rtm_family = addr.family;
1700 if (addr.bytelen)
1701 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1702 req.r.rtm_src_len = addr.bitlen;
1703 } else if (matches(*argv, "iif") == 0) {
1704 NEXT_ARG();
1705 idev = *argv;
1706 } else if (matches(*argv, "mark") == 0) {
1707 NEXT_ARG();
1708 get_unsigned(&mark, *argv, 0);
1709 } else if (matches(*argv, "oif") == 0 ||
1710 strcmp(*argv, "dev") == 0) {
1711 NEXT_ARG();
1712 odev = *argv;
1713 } else if (matches(*argv, "notify") == 0) {
1714 req.r.rtm_flags |= RTM_F_NOTIFY;
1715 } else if (matches(*argv, "connected") == 0) {
1716 connected = 1;
1717 } else if (matches(*argv, "vrf") == 0) {
1718 NEXT_ARG();
1719 if (!name_is_vrf(*argv))
1720 invarg("Invalid VRF\n", *argv);
1721 odev = *argv;
1722 } else if (matches(*argv, "uid") == 0) {
1723 uid_t uid;
1724
1725 NEXT_ARG();
1726 if (get_unsigned(&uid, *argv, 0))
1727 invarg("invalid UID\n", *argv);
1728 addattr32(&req.n, sizeof(req), RTA_UID, uid);
1729 } else {
1730 inet_prefix addr;
1731
1732 if (strcmp(*argv, "to") == 0) {
1733 NEXT_ARG();
1734 }
1735 if (matches(*argv, "help") == 0)
1736 usage();
1737 get_prefix(&addr, *argv, req.r.rtm_family);
1738 if (req.r.rtm_family == AF_UNSPEC)
1739 req.r.rtm_family = addr.family;
1740 if (addr.bytelen)
1741 addattr_l(&req.n, sizeof(req), RTA_DST, &addr.data, addr.bytelen);
1742 req.r.rtm_dst_len = addr.bitlen;
1743 }
1744 argc--; argv++;
1745 }
1746
1747 if (req.r.rtm_dst_len == 0) {
1748 fprintf(stderr, "need at least a destination address\n");
1749 exit(1);
1750 }
1751
1752 if (idev || odev) {
1753 int idx;
1754
1755 if (idev) {
1756 if ((idx = ll_name_to_index(idev)) == 0) {
1757 fprintf(stderr, "Cannot find device \"%s\"\n", idev);
1758 return -1;
1759 }
1760 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1761 }
1762 if (odev) {
1763 if ((idx = ll_name_to_index(odev)) == 0) {
1764 fprintf(stderr, "Cannot find device \"%s\"\n", odev);
1765 return -1;
1766 }
1767 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1768 }
1769 }
1770 if (mark)
1771 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
1772
1773 if (req.r.rtm_family == AF_UNSPEC)
1774 req.r.rtm_family = AF_INET;
1775
1776 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
1777
1778 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
1779 return -2;
1780
1781 if (connected && !from_ok) {
1782 struct rtmsg *r = NLMSG_DATA(&req.n);
1783 int len = req.n.nlmsg_len;
1784 struct rtattr *tb[RTA_MAX+1];
1785
1786 if (print_route(NULL, &req.n, (void *)stdout) < 0) {
1787 fprintf(stderr, "An error :-)\n");
1788 return -1;
1789 }
1790
1791 if (req.n.nlmsg_type != RTM_NEWROUTE) {
1792 fprintf(stderr, "Not a route?\n");
1793 return -1;
1794 }
1795 len -= NLMSG_LENGTH(sizeof(*r));
1796 if (len < 0) {
1797 fprintf(stderr, "Wrong len %d\n", len);
1798 return -1;
1799 }
1800
1801 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1802
1803 if (tb[RTA_PREFSRC]) {
1804 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
1805 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
1806 } else if (!tb[RTA_SRC]) {
1807 fprintf(stderr, "Failed to connect the route\n");
1808 return -1;
1809 }
1810 if (!odev && tb[RTA_OIF])
1811 tb[RTA_OIF]->rta_type = 0;
1812 if (tb[RTA_GATEWAY])
1813 tb[RTA_GATEWAY]->rta_type = 0;
1814 if (tb[RTA_VIA])
1815 tb[RTA_VIA]->rta_type = 0;
1816 if (!idev && tb[RTA_IIF])
1817 tb[RTA_IIF]->rta_type = 0;
1818 req.n.nlmsg_flags = NLM_F_REQUEST;
1819 req.n.nlmsg_type = RTM_GETROUTE;
1820
1821 if (rtnl_talk(&rth, &req.n, &req.n, sizeof(req)) < 0)
1822 return -2;
1823 }
1824
1825 if (print_route(NULL, &req.n, (void *)stdout) < 0) {
1826 fprintf(stderr, "An error :-)\n");
1827 return -1;
1828 }
1829
1830 return 0;
1831 }
1832
1833 static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
1834 {
1835 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
1836 return 1;
1837
1838 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
1839 }
1840
1841 static int restore_handler(const struct sockaddr_nl *nl,
1842 struct rtnl_ctrl_data *ctrl,
1843 struct nlmsghdr *n, void *arg)
1844 {
1845 struct rtmsg *r = NLMSG_DATA(n);
1846 struct rtattr *tb[RTA_MAX+1];
1847 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
1848 int ret, prio = *(int *)arg;
1849
1850 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1851
1852 /* Restore routes in correct order:
1853 * 0. ones for local addresses,
1854 * 1. ones for local networks,
1855 * 2. others (remote networks/hosts).
1856 */
1857 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
1858 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
1859 goto restore;
1860 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
1861 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
1862 goto restore;
1863 else if (prio == 2 && tb[RTA_GATEWAY])
1864 goto restore;
1865
1866 return 0;
1867
1868 restore:
1869 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
1870
1871 ll_init_map(&rth);
1872
1873 ret = rtnl_talk(&rth, n, n, sizeof(*n));
1874 if ((ret < 0) && (errno == EEXIST))
1875 ret = 0;
1876
1877 return ret;
1878 }
1879
1880 static int route_dump_check_magic(void)
1881 {
1882 int ret;
1883 __u32 magic = 0;
1884
1885 if (isatty(STDIN_FILENO)) {
1886 fprintf(stderr, "Can't restore route dump from a terminal\n");
1887 return -1;
1888 }
1889
1890 ret = fread(&magic, sizeof(magic), 1, stdin);
1891 if (magic != route_dump_magic) {
1892 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
1893 return -1;
1894 }
1895
1896 return 0;
1897 }
1898
1899 static int iproute_restore(void)
1900 {
1901 int pos, prio;
1902
1903 if (route_dump_check_magic())
1904 exit(-1);
1905
1906 pos = ftell(stdin);
1907 if (pos == -1) {
1908 perror("Failed to restore: ftell");
1909 exit(-1);
1910 }
1911
1912 for (prio = 0; prio < 3; prio++) {
1913 int err;
1914
1915 err = rtnl_from_file(stdin, &restore_handler, &prio);
1916 if (err)
1917 exit(err);
1918
1919 if (fseek(stdin, pos, SEEK_SET) == -1) {
1920 perror("Failed to restore: fseek");
1921 exit(-1);
1922 }
1923 }
1924
1925 exit(0);
1926 }
1927
1928 static int show_handler(const struct sockaddr_nl *nl,
1929 struct rtnl_ctrl_data *ctrl,
1930 struct nlmsghdr *n, void *arg)
1931 {
1932 print_route(nl, n, stdout);
1933 return 0;
1934 }
1935
1936 static int iproute_showdump(void)
1937 {
1938 if (route_dump_check_magic())
1939 exit(-1);
1940
1941 exit(rtnl_from_file(stdin, &show_handler, NULL));
1942 }
1943
1944 void iproute_reset_filter(int ifindex)
1945 {
1946 memset(&filter, 0, sizeof(filter));
1947 filter.mdst.bitlen = -1;
1948 filter.msrc.bitlen = -1;
1949 filter.oif = ifindex;
1950 if (filter.oif > 0)
1951 filter.oifmask = -1;
1952 }
1953
1954 int do_iproute(int argc, char **argv)
1955 {
1956 if (argc < 1)
1957 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
1958
1959 if (matches(*argv, "add") == 0)
1960 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
1961 argc-1, argv+1);
1962 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
1963 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
1964 argc-1, argv+1);
1965 if (matches(*argv, "replace") == 0)
1966 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
1967 argc-1, argv+1);
1968 if (matches(*argv, "prepend") == 0)
1969 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
1970 argc-1, argv+1);
1971 if (matches(*argv, "append") == 0)
1972 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
1973 argc-1, argv+1);
1974 if (matches(*argv, "test") == 0)
1975 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
1976 argc-1, argv+1);
1977 if (matches(*argv, "delete") == 0)
1978 return iproute_modify(RTM_DELROUTE, 0,
1979 argc-1, argv+1);
1980 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
1981 || matches(*argv, "lst") == 0)
1982 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
1983 if (matches(*argv, "get") == 0)
1984 return iproute_get(argc-1, argv+1);
1985 if (matches(*argv, "flush") == 0)
1986 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
1987 if (matches(*argv, "save") == 0)
1988 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
1989 if (matches(*argv, "restore") == 0)
1990 return iproute_restore();
1991 if (matches(*argv, "showdump") == 0)
1992 return iproute_showdump();
1993 if (matches(*argv, "help") == 0)
1994 usage();
1995 fprintf(stderr, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
1996 exit(-1);
1997 }
Upstream mirror of iproute2