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Merge branch 'iproute2-master' into iproute2-next
[mirror_iproute2.git] / ip / iproute.c
1 /*
2 * iproute.c "ip route".
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 */
12
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <unistd.h>
16 #include <fcntl.h>
17 #include <string.h>
18 #include <time.h>
19 #include <sys/time.h>
20 #include <sys/socket.h>
21 #include <netinet/in.h>
22 #include <netinet/ip.h>
23 #include <arpa/inet.h>
24 #include <linux/in_route.h>
25 #include <linux/icmpv6.h>
26 #include <errno.h>
27
28 #include "rt_names.h"
29 #include "utils.h"
30 #include "ip_common.h"
31
32 #ifndef RTAX_RTTVAR
33 #define RTAX_RTTVAR RTAX_HOPS
34 #endif
35
36 enum list_action {
37 IPROUTE_LIST,
38 IPROUTE_FLUSH,
39 IPROUTE_SAVE,
40 };
41 static const char *mx_names[RTAX_MAX+1] = {
42 [RTAX_MTU] = "mtu",
43 [RTAX_WINDOW] = "window",
44 [RTAX_RTT] = "rtt",
45 [RTAX_RTTVAR] = "rttvar",
46 [RTAX_SSTHRESH] = "ssthresh",
47 [RTAX_CWND] = "cwnd",
48 [RTAX_ADVMSS] = "advmss",
49 [RTAX_REORDERING] = "reordering",
50 [RTAX_HOPLIMIT] = "hoplimit",
51 [RTAX_INITCWND] = "initcwnd",
52 [RTAX_FEATURES] = "features",
53 [RTAX_RTO_MIN] = "rto_min",
54 [RTAX_INITRWND] = "initrwnd",
55 [RTAX_QUICKACK] = "quickack",
56 [RTAX_CC_ALGO] = "congctl",
57 [RTAX_FASTOPEN_NO_COOKIE] = "fastopen_no_cookie"
58 };
59 static void usage(void) __attribute__((noreturn));
60
61 static void usage(void)
62 {
63 fprintf(stderr,
64 "Usage: ip route { list | flush } SELECTOR\n"
65 " ip route save SELECTOR\n"
66 " ip route restore\n"
67 " ip route showdump\n"
68 " ip route get [ ROUTE_GET_FLAGS ] ADDRESS\n"
69 " [ from ADDRESS iif STRING ]\n"
70 " [ oif STRING ] [ tos TOS ]\n"
71 " [ mark NUMBER ] [ vrf NAME ]\n"
72 " [ uid NUMBER ]\n"
73 " ip route { add | del | change | append | replace } ROUTE\n"
74 "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"
75 " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n"
76 " [ type TYPE ] [ scope SCOPE ]\n"
77 "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"
78 "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"
79 " [ table TABLE_ID ] [ proto RTPROTO ]\n"
80 " [ scope SCOPE ] [ metric METRIC ]\n"
81 " [ ttl-propagate { enabled | disabled } ]\n"
82 "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n"
83 "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n"
84 " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"
85 "FAMILY := [ inet | inet6 | ipx | dnet | mpls | bridge | link ]\n"
86 "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n"
87 " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n"
88 " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"
89 " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"
90 " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n"
91 " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n"
92 " [ pref PREF ] [ expires TIME ] [ fastopen_no_cookie BOOL ]\n"
93 "TYPE := { unicast | local | broadcast | multicast | throw |\n"
94 " unreachable | prohibit | blackhole | nat }\n"
95 "TABLE_ID := [ local | main | default | all | NUMBER ]\n"
96 "SCOPE := [ host | link | global | NUMBER ]\n"
97 "NHFLAGS := [ onlink | pervasive ]\n"
98 "RTPROTO := [ kernel | boot | static | NUMBER ]\n"
99 "PREF := [ low | medium | high ]\n"
100 "TIME := NUMBER[s|ms]\n"
101 "BOOL := [1|0]\n"
102 "FEATURES := ecn\n"
103 "ENCAPTYPE := [ mpls | ip | ip6 | seg6 | seg6local ]\n"
104 "ENCAPHDR := [ MPLSLABEL | SEG6HDR ]\n"
105 "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n"
106 "SEGMODE := [ encap | inline ]\n"
107 "ROUTE_GET_FLAGS := [ fibmatch ]\n");
108 exit(-1);
109 }
110
111
112 static struct
113 {
114 unsigned int tb;
115 int cloned;
116 int flushed;
117 char *flushb;
118 int flushp;
119 int flushe;
120 int protocol, protocolmask;
121 int scope, scopemask;
122 __u64 typemask;
123 int tos, tosmask;
124 int iif, iifmask;
125 int oif, oifmask;
126 int mark, markmask;
127 int realm, realmmask;
128 __u32 metric, metricmask;
129 inet_prefix rprefsrc;
130 inet_prefix rvia;
131 inet_prefix rdst;
132 inet_prefix mdst;
133 inet_prefix rsrc;
134 inet_prefix msrc;
135 } filter;
136
137 static int flush_update(void)
138 {
139 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
140 perror("Failed to send flush request");
141 return -2;
142 }
143 filter.flushp = 0;
144 return 0;
145 }
146
147 static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
148 {
149 struct rtmsg *r = NLMSG_DATA(n);
150 inet_prefix dst = { .family = r->rtm_family };
151 inet_prefix src = { .family = r->rtm_family };
152 inet_prefix via = { .family = r->rtm_family };
153 inet_prefix prefsrc = { .family = r->rtm_family };
154 __u32 table;
155 static int ip6_multiple_tables;
156
157 table = rtm_get_table(r, tb);
158
159 if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
160 return 0;
161
162 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
163 ip6_multiple_tables = 1;
164
165 if (filter.cloned == !(r->rtm_flags & RTM_F_CLONED))
166 return 0;
167
168 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
169 if (filter.tb) {
170 if (filter.tb == RT_TABLE_LOCAL) {
171 if (r->rtm_type != RTN_LOCAL)
172 return 0;
173 } else if (filter.tb == RT_TABLE_MAIN) {
174 if (r->rtm_type == RTN_LOCAL)
175 return 0;
176 } else {
177 return 0;
178 }
179 }
180 } else {
181 if (filter.tb > 0 && filter.tb != table)
182 return 0;
183 }
184 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
185 return 0;
186 if ((filter.scope^r->rtm_scope)&filter.scopemask)
187 return 0;
188
189 if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
190 return 0;
191 if ((filter.tos^r->rtm_tos)&filter.tosmask)
192 return 0;
193 if (filter.rdst.family &&
194 (r->rtm_family != filter.rdst.family || filter.rdst.bitlen > r->rtm_dst_len))
195 return 0;
196 if (filter.mdst.family &&
197 (r->rtm_family != filter.mdst.family ||
198 (filter.mdst.bitlen >= 0 && filter.mdst.bitlen < r->rtm_dst_len)))
199 return 0;
200 if (filter.rsrc.family &&
201 (r->rtm_family != filter.rsrc.family || filter.rsrc.bitlen > r->rtm_src_len))
202 return 0;
203 if (filter.msrc.family &&
204 (r->rtm_family != filter.msrc.family ||
205 (filter.msrc.bitlen >= 0 && filter.msrc.bitlen < r->rtm_src_len)))
206 return 0;
207 if (filter.rvia.family) {
208 int family = r->rtm_family;
209
210 if (tb[RTA_VIA]) {
211 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
212
213 family = via->rtvia_family;
214 }
215 if (family != filter.rvia.family)
216 return 0;
217 }
218 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
219 return 0;
220
221 if (tb[RTA_DST])
222 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
223 if (filter.rsrc.family || filter.msrc.family) {
224 if (tb[RTA_SRC])
225 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
226 }
227 if (filter.rvia.bitlen > 0) {
228 if (tb[RTA_GATEWAY])
229 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
230 if (tb[RTA_VIA]) {
231 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
232 struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
233
234 via.family = rtvia->rtvia_family;
235 memcpy(&via.data, rtvia->rtvia_addr, len);
236 }
237 }
238 if (filter.rprefsrc.bitlen > 0) {
239 if (tb[RTA_PREFSRC])
240 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
241 }
242
243 if (filter.rdst.family && inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
244 return 0;
245 if (filter.mdst.family && filter.mdst.bitlen >= 0 &&
246 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
247 return 0;
248
249 if (filter.rsrc.family && inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
250 return 0;
251 if (filter.msrc.family && filter.msrc.bitlen >= 0 &&
252 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
253 return 0;
254
255 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
256 return 0;
257 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
258 return 0;
259 if (filter.realmmask) {
260 __u32 realms = 0;
261
262 if (tb[RTA_FLOW])
263 realms = rta_getattr_u32(tb[RTA_FLOW]);
264 if ((realms^filter.realm)&filter.realmmask)
265 return 0;
266 }
267 if (filter.iifmask) {
268 int iif = 0;
269
270 if (tb[RTA_IIF])
271 iif = rta_getattr_u32(tb[RTA_IIF]);
272 if ((iif^filter.iif)&filter.iifmask)
273 return 0;
274 }
275 if (filter.oifmask) {
276 int oif = 0;
277
278 if (tb[RTA_OIF])
279 oif = rta_getattr_u32(tb[RTA_OIF]);
280 if ((oif^filter.oif)&filter.oifmask)
281 return 0;
282 }
283 if (filter.markmask) {
284 int mark = 0;
285
286 if (tb[RTA_MARK])
287 mark = rta_getattr_u32(tb[RTA_MARK]);
288 if ((mark ^ filter.mark) & filter.markmask)
289 return 0;
290 }
291 if (filter.metricmask) {
292 __u32 metric = 0;
293
294 if (tb[RTA_PRIORITY])
295 metric = rta_getattr_u32(tb[RTA_PRIORITY]);
296 if ((metric ^ filter.metric) & filter.metricmask)
297 return 0;
298 }
299 if (filter.flushb &&
300 r->rtm_family == AF_INET6 &&
301 r->rtm_dst_len == 0 &&
302 r->rtm_type == RTN_UNREACHABLE &&
303 tb[RTA_PRIORITY] &&
304 rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
305 return 0;
306
307 return 1;
308 }
309
310 static void print_rtax_features(FILE *fp, unsigned int features)
311 {
312 unsigned int of = features;
313
314 if (features & RTAX_FEATURE_ECN) {
315 print_null(PRINT_ANY, "ecn", "ecn ", NULL);
316 features &= ~RTAX_FEATURE_ECN;
317 }
318
319 if (features)
320 print_0xhex(PRINT_ANY,
321 "features", "0x%x ", of);
322 }
323
324 static void print_rt_flags(FILE *fp, unsigned int flags)
325 {
326 open_json_array(PRINT_JSON,
327 is_json_context() ? "flags" : "");
328
329 if (flags & RTNH_F_DEAD)
330 print_string(PRINT_ANY, NULL, "%s ", "dead");
331 if (flags & RTNH_F_ONLINK)
332 print_string(PRINT_ANY, NULL, "%s ", "onlink");
333 if (flags & RTNH_F_PERVASIVE)
334 print_string(PRINT_ANY, NULL, "%s ", "pervasive");
335 if (flags & RTNH_F_OFFLOAD)
336 print_string(PRINT_ANY, NULL, "%s ", "offload");
337 if (flags & RTM_F_NOTIFY)
338 print_string(PRINT_ANY, NULL, "%s ", "notify");
339 if (flags & RTNH_F_LINKDOWN)
340 print_string(PRINT_ANY, NULL, "%s ", "linkdown");
341 if (flags & RTNH_F_UNRESOLVED)
342 print_string(PRINT_ANY, NULL, "%s ", "unresolved");
343
344 close_json_array(PRINT_JSON, NULL);
345 }
346
347 static void print_rt_pref(FILE *fp, unsigned int pref)
348 {
349
350 switch (pref) {
351 case ICMPV6_ROUTER_PREF_LOW:
352 print_string(PRINT_ANY,
353 "pref", "pref %s", "low");
354 break;
355 case ICMPV6_ROUTER_PREF_MEDIUM:
356 print_string(PRINT_ANY,
357 "pref", "pref %s", "medium");
358 break;
359 case ICMPV6_ROUTER_PREF_HIGH:
360 print_string(PRINT_ANY,
361 "pref", "pref %s", "high");
362 break;
363 default:
364 print_uint(PRINT_ANY,
365 "pref", "%u", pref);
366 }
367 }
368
369 static void print_rta_if(FILE *fp, const struct rtattr *rta,
370 const char *prefix)
371 {
372 const char *ifname = ll_index_to_name(rta_getattr_u32(rta));
373
374 if (is_json_context())
375 print_string(PRINT_JSON, prefix, NULL, ifname);
376 else {
377 fprintf(fp, "%s ", prefix);
378 color_fprintf(fp, COLOR_IFNAME, "%s ", ifname);
379 }
380 }
381
382 static void print_cache_flags(FILE *fp, __u32 flags)
383 {
384 json_writer_t *jw = get_json_writer();
385 flags &= ~0xFFFF;
386
387 if (jw) {
388 jsonw_name(jw, "cache");
389 jsonw_start_array(jw);
390 } else {
391 fprintf(fp, "%s cache ", _SL_);
392 if (flags == 0)
393 return;
394 putc('<', fp);
395 }
396
397 #define PRTFL(fl, flname) \
398 if (flags & RTCF_##fl) { \
399 flags &= ~RTCF_##fl; \
400 if (jw) \
401 jsonw_string(jw, flname); \
402 else \
403 fprintf(fp, "%s%s", flname, flags ? "," : "> "); \
404 }
405
406 PRTFL(LOCAL, "local");
407 PRTFL(REJECT, "reject");
408 PRTFL(MULTICAST, "mc");
409 PRTFL(BROADCAST, "brd");
410 PRTFL(DNAT, "dst-nat");
411 PRTFL(SNAT, "src-nat");
412 PRTFL(MASQ, "masq");
413 PRTFL(DIRECTDST, "dst-direct");
414 PRTFL(DIRECTSRC, "src-direct");
415 PRTFL(REDIRECTED, "redirected");
416 PRTFL(DOREDIRECT, "redirect");
417 PRTFL(FAST, "fastroute");
418 PRTFL(NOTIFY, "notify");
419 PRTFL(TPROXY, "proxy");
420 #undef PRTFL
421
422 if (flags)
423 print_hex(PRINT_ANY, "flags", "%x>", flags);
424
425 if (jw) {
426 jsonw_end_array(jw);
427 jsonw_destroy(&jw);
428 }
429 }
430
431 static void print_rta_cacheinfo(FILE *fp, const struct rta_cacheinfo *ci)
432 {
433 static int hz;
434
435 if (!hz)
436 hz = get_user_hz();
437
438 if (ci->rta_expires != 0)
439 print_uint(PRINT_ANY, "expires",
440 "expires %usec ", ci->rta_expires/hz);
441 if (ci->rta_error != 0)
442 print_uint(PRINT_ANY, "error",
443 "error %u ", ci->rta_error);
444
445 if (show_stats) {
446 if (ci->rta_clntref)
447 print_uint(PRINT_ANY, "users",
448 "users %u ", ci->rta_clntref);
449 if (ci->rta_used != 0)
450 print_uint(PRINT_ANY, "used",
451 "used %u ", ci->rta_used);
452 if (ci->rta_lastuse != 0)
453 print_uint(PRINT_ANY, "age",
454 "age %usec ", ci->rta_lastuse/hz);
455 }
456 if (ci->rta_id)
457 print_0xhex(PRINT_ANY, "ipid",
458 "ipid 0x%04x ", ci->rta_id);
459 if (ci->rta_ts || ci->rta_tsage) {
460 print_0xhex(PRINT_ANY, "ts",
461 "ts 0x%x", ci->rta_ts);
462 print_uint(PRINT_ANY, "tsage",
463 "tsage %usec ", ci->rta_tsage);
464 }
465 }
466
467 static void print_rta_flow(FILE *fp, const struct rtattr *rta)
468 {
469 __u32 to = rta_getattr_u32(rta);
470 __u32 from = to >> 16;
471 SPRINT_BUF(b1);
472
473 to &= 0xFFFF;
474 if (is_json_context()) {
475 open_json_object("flow");
476
477 if (from)
478 print_string(PRINT_JSON, "from", NULL,
479 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
480 print_string(PRINT_JSON, "to", NULL,
481 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
482 close_json_object();
483 } else {
484 fprintf(fp, "realm%s ", from ? "s" : "");
485
486 if (from)
487 print_string(PRINT_FP, NULL, "%s/",
488 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
489 print_string(PRINT_FP, NULL, "%s ",
490 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
491 }
492 }
493
494 static void print_rta_newdst(FILE *fp, const struct rtmsg *r,
495 const struct rtattr *rta)
496 {
497 const char *newdst = format_host_rta(r->rtm_family, rta);
498
499 if (is_json_context())
500 print_string(PRINT_JSON, "to", NULL, newdst);
501 else {
502 fprintf(fp, "as to ");
503 print_color_string(PRINT_FP,
504 ifa_family_color(r->rtm_family),
505 NULL, "%s ", newdst);
506 }
507 }
508
509 static void print_rta_gateway(FILE *fp, const struct rtmsg *r,
510 const struct rtattr *rta)
511 {
512 const char *gateway = format_host_rta(r->rtm_family, rta);
513
514 if (is_json_context())
515 print_string(PRINT_JSON, "gateway", NULL, gateway);
516 else {
517 fprintf(fp, "via ");
518 print_color_string(PRINT_FP,
519 ifa_family_color(r->rtm_family),
520 NULL, "%s ", gateway);
521 }
522 }
523
524 static void print_rta_via(FILE *fp, const struct rtattr *rta)
525 {
526 size_t len = RTA_PAYLOAD(rta) - 2;
527 const struct rtvia *via = RTA_DATA(rta);
528
529 if (is_json_context()) {
530 open_json_object("via");
531 print_string(PRINT_JSON, "family", NULL,
532 family_name(via->rtvia_family));
533 print_string(PRINT_JSON, "host", NULL,
534 format_host(via->rtvia_family, len,
535 via->rtvia_addr));
536 close_json_object();
537 } else {
538 print_string(PRINT_FP, NULL, "via %s ",
539 family_name(via->rtvia_family));
540 print_color_string(PRINT_FP,
541 ifa_family_color(via->rtvia_family),
542 NULL, "%s ",
543 format_host(via->rtvia_family,
544 len, via->rtvia_addr));
545 }
546 }
547
548 static void print_rta_metrics(FILE *fp, const struct rtattr *rta)
549 {
550 struct rtattr *mxrta[RTAX_MAX+1];
551 unsigned int mxlock = 0;
552 int i;
553
554 open_json_array(PRINT_JSON, "metrics");
555
556 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta));
557
558 if (mxrta[RTAX_LOCK])
559 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
560
561 for (i = 2; i <= RTAX_MAX; i++) {
562 __u32 val = 0U;
563
564 if (mxrta[i] == NULL && !(mxlock & (1 << i)))
565 continue;
566
567 if (mxrta[i] != NULL && i != RTAX_CC_ALGO)
568 val = rta_getattr_u32(mxrta[i]);
569
570 if (i == RTAX_HOPLIMIT && (int)val == -1)
571 continue;
572
573 if (!is_json_context()) {
574 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
575 fprintf(fp, "%s ", mx_names[i]);
576 else
577 fprintf(fp, "metric %d ", i);
578
579 if (mxlock & (1<<i))
580 fprintf(fp, "lock ");
581 }
582
583 switch (i) {
584 case RTAX_FEATURES:
585 print_rtax_features(fp, val);
586 break;
587 default:
588 fprintf(fp, "%u ", val);
589 break;
590
591 case RTAX_RTT:
592 case RTAX_RTTVAR:
593 case RTAX_RTO_MIN:
594 if (i == RTAX_RTT)
595 val /= 8;
596 else if (i == RTAX_RTTVAR)
597 val /= 4;
598
599 if (is_json_context())
600 print_uint(PRINT_JSON, mx_names[i],
601 NULL, val);
602 else {
603 if (val >= 1000)
604 fprintf(fp, "%gs ", val/1e3);
605 else
606 fprintf(fp, "%ums ", val);
607 }
608 break;
609 case RTAX_CC_ALGO:
610 print_string(PRINT_ANY, "congestion",
611 "%s ", rta_getattr_str(mxrta[i]));
612 break;
613 }
614 }
615
616 close_json_array(PRINT_JSON, NULL);
617 }
618
619 static void print_rta_multipath(FILE *fp, const struct rtmsg *r,
620 struct rtattr *rta)
621 {
622 const struct rtnexthop *nh = RTA_DATA(rta);
623 int len = RTA_PAYLOAD(rta);
624 int first = 1;
625
626 while (len > sizeof(*nh)) {
627 struct rtattr *tb[RTA_MAX + 1];
628
629 if (nh->rtnh_len > len)
630 break;
631
632 if (!is_json_context()) {
633 if ((r->rtm_flags & RTM_F_CLONED) &&
634 r->rtm_type == RTN_MULTICAST) {
635 if (first) {
636 fprintf(fp, "Oifs: ");
637 first = 0;
638 } else {
639 fprintf(fp, " ");
640 }
641 } else
642 fprintf(fp, "%s\tnexthop ", _SL_);
643 }
644
645 if (nh->rtnh_len > sizeof(*nh)) {
646 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh),
647 nh->rtnh_len - sizeof(*nh));
648
649 if (tb[RTA_ENCAP])
650 lwt_print_encap(fp,
651 tb[RTA_ENCAP_TYPE],
652 tb[RTA_ENCAP]);
653 if (tb[RTA_NEWDST])
654 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
655 if (tb[RTA_GATEWAY])
656 print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
657 if (tb[RTA_VIA])
658 print_rta_via(fp, tb[RTA_VIA]);
659 if (tb[RTA_FLOW])
660 print_rta_flow(fp, tb[RTA_FLOW]);
661 }
662
663 if ((r->rtm_flags & RTM_F_CLONED) &&
664 r->rtm_type == RTN_MULTICAST) {
665 fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
666 if (nh->rtnh_hops != 1)
667 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
668 fprintf(fp, " ");
669 } else {
670 fprintf(fp, "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
671 if (r->rtm_family != AF_MPLS)
672 fprintf(fp, "weight %d ",
673 nh->rtnh_hops+1);
674 }
675
676 print_rt_flags(fp, nh->rtnh_flags);
677
678 len -= NLMSG_ALIGN(nh->rtnh_len);
679 nh = RTNH_NEXT(nh);
680 }
681 }
682
683 int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
684 {
685 FILE *fp = (FILE *)arg;
686 struct rtmsg *r = NLMSG_DATA(n);
687 int len = n->nlmsg_len;
688 struct rtattr *tb[RTA_MAX+1];
689 int family, color, host_len;
690 __u32 table;
691 int ret;
692
693 SPRINT_BUF(b1);
694
695 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
696 fprintf(stderr, "Not a route: %08x %08x %08x\n",
697 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
698 return -1;
699 }
700 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
701 return 0;
702 len -= NLMSG_LENGTH(sizeof(*r));
703 if (len < 0) {
704 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
705 return -1;
706 }
707
708 host_len = af_bit_len(r->rtm_family);
709
710 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
711 table = rtm_get_table(r, tb);
712
713 if (!filter_nlmsg(n, tb, host_len))
714 return 0;
715
716 if (filter.flushb) {
717 struct nlmsghdr *fn;
718
719 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
720 ret = flush_update();
721 if (ret < 0)
722 return ret;
723 }
724 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
725 memcpy(fn, n, n->nlmsg_len);
726 fn->nlmsg_type = RTM_DELROUTE;
727 fn->nlmsg_flags = NLM_F_REQUEST;
728 fn->nlmsg_seq = ++rth.seq;
729 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
730 filter.flushed++;
731 if (show_stats < 2)
732 return 0;
733 }
734
735 open_json_object(NULL);
736 if (n->nlmsg_type == RTM_DELROUTE)
737 print_bool(PRINT_ANY, "deleted", "Deleted ", true);
738
739 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
740 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
741 print_string(PRINT_ANY, NULL, "%s ",
742 rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
743
744 color = COLOR_NONE;
745 if (tb[RTA_DST]) {
746 family = get_real_family(r->rtm_type, r->rtm_family);
747 color = ifa_family_color(family);
748
749 if (r->rtm_dst_len != host_len) {
750 snprintf(b1, sizeof(b1),
751 "%s/%u", rt_addr_n2a_rta(family, tb[RTA_DST]),
752 r->rtm_dst_len);
753 } else {
754 format_host_rta_r(family, tb[RTA_DST],
755 b1, sizeof(b1));
756
757 }
758 } else if (r->rtm_dst_len) {
759 snprintf(b1, sizeof(b1), "0/%d ", r->rtm_dst_len);
760 } else {
761 strncpy(b1, "default", sizeof(b1));
762 }
763 print_color_string(PRINT_ANY, color,
764 "dst", "%s ", b1);
765
766 if (tb[RTA_SRC]) {
767 family = get_real_family(r->rtm_type, r->rtm_family);
768 color = ifa_family_color(family);
769
770 if (r->rtm_src_len != host_len) {
771 snprintf(b1, sizeof(b1),
772 "%s/%u",
773 rt_addr_n2a_rta(family, tb[RTA_SRC]),
774 r->rtm_src_len);
775 } else {
776 format_host_rta_r(family, tb[RTA_SRC],
777 b1, sizeof(b1));
778 }
779 print_color_string(PRINT_ANY, color,
780 "from", "from %s ", b1);
781 } else if (r->rtm_src_len) {
782 snprintf(b1, sizeof(b1), "0/%u", r->rtm_src_len);
783
784 print_string(PRINT_ANY, "src", "from %s ", b1);
785 }
786
787 if (tb[RTA_NEWDST])
788 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
789
790 if (tb[RTA_ENCAP])
791 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
792
793 if (r->rtm_tos && filter.tosmask != -1) {
794 print_string(PRINT_ANY, "tos", "tos %s ",
795 rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
796 }
797
798 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len)
799 print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
800
801 if (tb[RTA_VIA])
802 print_rta_via(fp, tb[RTA_VIA]);
803
804 if (tb[RTA_OIF] && filter.oifmask != -1)
805 print_rta_if(fp, tb[RTA_OIF], "dev");
806
807 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
808 print_string(PRINT_ANY,
809 "table", "table %s ",
810 rtnl_rttable_n2a(table, b1, sizeof(b1)));
811
812 if (!(r->rtm_flags & RTM_F_CLONED)) {
813 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) &&
814 filter.protocolmask != -1)
815 print_string(PRINT_ANY,
816 "protocol", "proto %s ",
817 rtnl_rtprot_n2a(r->rtm_protocol,
818 b1, sizeof(b1)));
819
820 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) &&
821 filter.scopemask != -1)
822 print_string(PRINT_ANY,
823 "scope", "scope %s ",
824 rtnl_rtscope_n2a(r->rtm_scope,
825 b1, sizeof(b1)));
826 }
827
828 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
829 const char *psrc
830 = rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]);
831
832 /* Do not use format_host(). It is our local addr
833 and symbolic name will not be useful.
834 */
835 if (is_json_context())
836 print_string(PRINT_JSON, "prefsrc", NULL, psrc);
837 else {
838 fprintf(fp, "src ");
839 print_color_string(PRINT_FP,
840 ifa_family_color(r->rtm_family),
841 NULL, "%s ", psrc);
842 }
843
844 }
845
846 if (tb[RTA_PRIORITY] && filter.metricmask != -1)
847 print_uint(PRINT_ANY, "metric", "metric %u ",
848 rta_getattr_u32(tb[RTA_PRIORITY]));
849
850 print_rt_flags(fp, r->rtm_flags);
851
852 if (tb[RTA_MARK]) {
853 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
854
855 if (mark) {
856 if (is_json_context())
857 print_uint(PRINT_JSON, "mark", NULL, mark);
858 else if (mark >= 16)
859 print_0xhex(PRINT_FP, NULL,
860 "mark 0x%x ", mark);
861 else
862 print_uint(PRINT_FP, NULL,
863 "mark %u ", mark);
864 }
865 }
866
867 if (tb[RTA_FLOW] && filter.realmmask != ~0U)
868 print_rta_flow(fp, tb[RTA_FLOW]);
869
870 if (tb[RTA_UID])
871 print_uint(PRINT_ANY, "uid", "uid %u ",
872 rta_getattr_u32(tb[RTA_UID]));
873
874 if (r->rtm_family == AF_INET) {
875 if (r->rtm_flags & RTM_F_CLONED) {
876 print_cache_flags(fp, r->rtm_flags);
877
878 if (tb[RTA_CACHEINFO])
879 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
880 }
881 } else if (r->rtm_family == AF_INET6) {
882 if (r->rtm_flags & RTM_F_CLONED) {
883 if (tb[RTA_CACHEINFO])
884 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
885 }
886 }
887
888 if (tb[RTA_METRICS])
889 print_rta_metrics(fp, tb[RTA_METRICS]);
890
891 if (tb[RTA_IIF] && filter.iifmask != -1)
892 print_rta_if(fp, tb[RTA_IIF], "iif");
893
894 if (tb[RTA_MULTIPATH])
895 print_rta_multipath(fp, r, tb[RTA_MULTIPATH]);
896
897 if (tb[RTA_PREF])
898 print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));
899
900 if (tb[RTA_TTL_PROPAGATE]) {
901 bool propogate = rta_getattr_u8(tb[RTA_TTL_PROPAGATE]);
902
903 if (is_json_context())
904 print_bool(PRINT_JSON, "ttl-propogate", NULL,
905 propogate);
906 else
907 print_string(PRINT_FP, NULL,
908 "ttl-propogate %s",
909 propogate ? "enabled" : "disabled");
910 }
911
912 print_string(PRINT_FP, NULL, "\n", NULL);
913 close_json_object();
914 fflush(fp);
915 return 0;
916 }
917
918 static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
919 struct rtattr *rta, struct rtnexthop *rtnh,
920 int *argcp, char ***argvp)
921 {
922 int argc = *argcp;
923 char **argv = *argvp;
924
925 while (++argv, --argc > 0) {
926 if (strcmp(*argv, "via") == 0) {
927 inet_prefix addr;
928 int family;
929
930 NEXT_ARG();
931 family = read_family(*argv);
932 if (family == AF_UNSPEC)
933 family = r->rtm_family;
934 else
935 NEXT_ARG();
936 get_addr(&addr, *argv, family);
937 if (r->rtm_family == AF_UNSPEC)
938 r->rtm_family = addr.family;
939 if (addr.family == r->rtm_family) {
940 rta_addattr_l(rta, 4096, RTA_GATEWAY, &addr.data, addr.bytelen);
941 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
942 } else {
943 rta_addattr_l(rta, 4096, RTA_VIA, &addr.family, addr.bytelen+2);
944 rtnh->rtnh_len += RTA_SPACE(addr.bytelen+2);
945 }
946 } else if (strcmp(*argv, "dev") == 0) {
947 NEXT_ARG();
948 rtnh->rtnh_ifindex = ll_name_to_index(*argv);
949 if (!rtnh->rtnh_ifindex)
950 return nodev(*argv);
951 } else if (strcmp(*argv, "weight") == 0) {
952 unsigned int w;
953
954 NEXT_ARG();
955 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
956 invarg("\"weight\" is invalid\n", *argv);
957 rtnh->rtnh_hops = w - 1;
958 } else if (strcmp(*argv, "onlink") == 0) {
959 rtnh->rtnh_flags |= RTNH_F_ONLINK;
960 } else if (matches(*argv, "realms") == 0) {
961 __u32 realm;
962
963 NEXT_ARG();
964 if (get_rt_realms_or_raw(&realm, *argv))
965 invarg("\"realm\" value is invalid\n", *argv);
966 rta_addattr32(rta, 4096, RTA_FLOW, realm);
967 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
968 } else if (strcmp(*argv, "encap") == 0) {
969 int len = rta->rta_len;
970
971 lwt_parse_encap(rta, 4096, &argc, &argv);
972 rtnh->rtnh_len += rta->rta_len - len;
973 } else if (strcmp(*argv, "as") == 0) {
974 inet_prefix addr;
975
976 NEXT_ARG();
977 if (strcmp(*argv, "to") == 0)
978 NEXT_ARG();
979 get_addr(&addr, *argv, r->rtm_family);
980 rta_addattr_l(rta, 4096, RTA_NEWDST, &addr.data,
981 addr.bytelen);
982 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
983 } else
984 break;
985 }
986 *argcp = argc;
987 *argvp = argv;
988 return 0;
989 }
990
991 static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
992 int argc, char **argv)
993 {
994 char buf[1024];
995 struct rtattr *rta = (void *)buf;
996 struct rtnexthop *rtnh;
997
998 rta->rta_type = RTA_MULTIPATH;
999 rta->rta_len = RTA_LENGTH(0);
1000 rtnh = RTA_DATA(rta);
1001
1002 while (argc > 0) {
1003 if (strcmp(*argv, "nexthop") != 0) {
1004 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
1005 exit(-1);
1006 }
1007 if (argc <= 1) {
1008 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
1009 exit(-1);
1010 }
1011 memset(rtnh, 0, sizeof(*rtnh));
1012 rtnh->rtnh_len = sizeof(*rtnh);
1013 rta->rta_len += rtnh->rtnh_len;
1014 parse_one_nh(n, r, rta, rtnh, &argc, &argv);
1015 rtnh = RTNH_NEXT(rtnh);
1016 }
1017
1018 if (rta->rta_len > RTA_LENGTH(0))
1019 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
1020 return 0;
1021 }
1022
1023 static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
1024 {
1025 struct {
1026 struct nlmsghdr n;
1027 struct rtmsg r;
1028 char buf[1024];
1029 } req = {
1030 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1031 .n.nlmsg_flags = NLM_F_REQUEST | flags,
1032 .n.nlmsg_type = cmd,
1033 .r.rtm_family = preferred_family,
1034 .r.rtm_table = RT_TABLE_MAIN,
1035 .r.rtm_scope = RT_SCOPE_NOWHERE,
1036 };
1037 char mxbuf[256];
1038 struct rtattr *mxrta = (void *)mxbuf;
1039 unsigned int mxlock = 0;
1040 char *d = NULL;
1041 int gw_ok = 0;
1042 int dst_ok = 0;
1043 int nhs_ok = 0;
1044 int scope_ok = 0;
1045 int table_ok = 0;
1046 int raw = 0;
1047 int type_ok = 0;
1048
1049 if (cmd != RTM_DELROUTE) {
1050 req.r.rtm_protocol = RTPROT_BOOT;
1051 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1052 req.r.rtm_type = RTN_UNICAST;
1053 }
1054
1055 mxrta->rta_type = RTA_METRICS;
1056 mxrta->rta_len = RTA_LENGTH(0);
1057
1058 while (argc > 0) {
1059 if (strcmp(*argv, "src") == 0) {
1060 inet_prefix addr;
1061
1062 NEXT_ARG();
1063 get_addr(&addr, *argv, req.r.rtm_family);
1064 if (req.r.rtm_family == AF_UNSPEC)
1065 req.r.rtm_family = addr.family;
1066 addattr_l(&req.n, sizeof(req),
1067 RTA_PREFSRC, &addr.data, addr.bytelen);
1068 } else if (strcmp(*argv, "as") == 0) {
1069 inet_prefix addr;
1070
1071 NEXT_ARG();
1072 if (strcmp(*argv, "to") == 0) {
1073 NEXT_ARG();
1074 }
1075 get_addr(&addr, *argv, req.r.rtm_family);
1076 if (req.r.rtm_family == AF_UNSPEC)
1077 req.r.rtm_family = addr.family;
1078 addattr_l(&req.n, sizeof(req),
1079 RTA_NEWDST, &addr.data, addr.bytelen);
1080 } else if (strcmp(*argv, "via") == 0) {
1081 inet_prefix addr;
1082 int family;
1083
1084 if (gw_ok) {
1085 invarg("use nexthop syntax to specify multiple via\n",
1086 *argv);
1087 }
1088 gw_ok = 1;
1089 NEXT_ARG();
1090 family = read_family(*argv);
1091 if (family == AF_UNSPEC)
1092 family = req.r.rtm_family;
1093 else
1094 NEXT_ARG();
1095 get_addr(&addr, *argv, family);
1096 if (req.r.rtm_family == AF_UNSPEC)
1097 req.r.rtm_family = addr.family;
1098 if (addr.family == req.r.rtm_family)
1099 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
1100 &addr.data, addr.bytelen);
1101 else
1102 addattr_l(&req.n, sizeof(req), RTA_VIA,
1103 &addr.family, addr.bytelen+2);
1104 } else if (strcmp(*argv, "from") == 0) {
1105 inet_prefix addr;
1106
1107 NEXT_ARG();
1108 get_prefix(&addr, *argv, req.r.rtm_family);
1109 if (req.r.rtm_family == AF_UNSPEC)
1110 req.r.rtm_family = addr.family;
1111 if (addr.bytelen)
1112 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1113 req.r.rtm_src_len = addr.bitlen;
1114 } else if (strcmp(*argv, "tos") == 0 ||
1115 matches(*argv, "dsfield") == 0) {
1116 __u32 tos;
1117
1118 NEXT_ARG();
1119 if (rtnl_dsfield_a2n(&tos, *argv))
1120 invarg("\"tos\" value is invalid\n", *argv);
1121 req.r.rtm_tos = tos;
1122 } else if (strcmp(*argv, "expires") == 0) {
1123 __u32 expires;
1124
1125 NEXT_ARG();
1126 if (get_u32(&expires, *argv, 0))
1127 invarg("\"expires\" value is invalid\n", *argv);
1128 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
1129 } else if (matches(*argv, "metric") == 0 ||
1130 matches(*argv, "priority") == 0 ||
1131 strcmp(*argv, "preference") == 0) {
1132 __u32 metric;
1133
1134 NEXT_ARG();
1135 if (get_u32(&metric, *argv, 0))
1136 invarg("\"metric\" value is invalid\n", *argv);
1137 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
1138 } else if (strcmp(*argv, "scope") == 0) {
1139 __u32 scope = 0;
1140
1141 NEXT_ARG();
1142 if (rtnl_rtscope_a2n(&scope, *argv))
1143 invarg("invalid \"scope\" value\n", *argv);
1144 req.r.rtm_scope = scope;
1145 scope_ok = 1;
1146 } else if (strcmp(*argv, "mtu") == 0) {
1147 unsigned int mtu;
1148
1149 NEXT_ARG();
1150 if (strcmp(*argv, "lock") == 0) {
1151 mxlock |= (1<<RTAX_MTU);
1152 NEXT_ARG();
1153 }
1154 if (get_unsigned(&mtu, *argv, 0))
1155 invarg("\"mtu\" value is invalid\n", *argv);
1156 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
1157 } else if (strcmp(*argv, "hoplimit") == 0) {
1158 unsigned int hoplimit;
1159
1160 NEXT_ARG();
1161 if (strcmp(*argv, "lock") == 0) {
1162 mxlock |= (1<<RTAX_HOPLIMIT);
1163 NEXT_ARG();
1164 }
1165 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
1166 invarg("\"hoplimit\" value is invalid\n", *argv);
1167 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
1168 } else if (strcmp(*argv, "advmss") == 0) {
1169 unsigned int mss;
1170
1171 NEXT_ARG();
1172 if (strcmp(*argv, "lock") == 0) {
1173 mxlock |= (1<<RTAX_ADVMSS);
1174 NEXT_ARG();
1175 }
1176 if (get_unsigned(&mss, *argv, 0))
1177 invarg("\"mss\" value is invalid\n", *argv);
1178 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
1179 } else if (matches(*argv, "reordering") == 0) {
1180 unsigned int reord;
1181
1182 NEXT_ARG();
1183 if (strcmp(*argv, "lock") == 0) {
1184 mxlock |= (1<<RTAX_REORDERING);
1185 NEXT_ARG();
1186 }
1187 if (get_unsigned(&reord, *argv, 0))
1188 invarg("\"reordering\" value is invalid\n", *argv);
1189 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1190 } else if (strcmp(*argv, "rtt") == 0) {
1191 unsigned int rtt;
1192
1193 NEXT_ARG();
1194 if (strcmp(*argv, "lock") == 0) {
1195 mxlock |= (1<<RTAX_RTT);
1196 NEXT_ARG();
1197 }
1198 if (get_time_rtt(&rtt, *argv, &raw))
1199 invarg("\"rtt\" value is invalid\n", *argv);
1200 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1201 (raw) ? rtt : rtt * 8);
1202 } else if (strcmp(*argv, "rto_min") == 0) {
1203 unsigned int rto_min;
1204
1205 NEXT_ARG();
1206 mxlock |= (1<<RTAX_RTO_MIN);
1207 if (get_time_rtt(&rto_min, *argv, &raw))
1208 invarg("\"rto_min\" value is invalid\n",
1209 *argv);
1210 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1211 rto_min);
1212 } else if (matches(*argv, "window") == 0) {
1213 unsigned int win;
1214
1215 NEXT_ARG();
1216 if (strcmp(*argv, "lock") == 0) {
1217 mxlock |= (1<<RTAX_WINDOW);
1218 NEXT_ARG();
1219 }
1220 if (get_unsigned(&win, *argv, 0))
1221 invarg("\"window\" value is invalid\n", *argv);
1222 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1223 } else if (matches(*argv, "cwnd") == 0) {
1224 unsigned int win;
1225
1226 NEXT_ARG();
1227 if (strcmp(*argv, "lock") == 0) {
1228 mxlock |= (1<<RTAX_CWND);
1229 NEXT_ARG();
1230 }
1231 if (get_unsigned(&win, *argv, 0))
1232 invarg("\"cwnd\" value is invalid\n", *argv);
1233 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1234 } else if (matches(*argv, "initcwnd") == 0) {
1235 unsigned int win;
1236
1237 NEXT_ARG();
1238 if (strcmp(*argv, "lock") == 0) {
1239 mxlock |= (1<<RTAX_INITCWND);
1240 NEXT_ARG();
1241 }
1242 if (get_unsigned(&win, *argv, 0))
1243 invarg("\"initcwnd\" value is invalid\n", *argv);
1244 rta_addattr32(mxrta, sizeof(mxbuf),
1245 RTAX_INITCWND, win);
1246 } else if (matches(*argv, "initrwnd") == 0) {
1247 unsigned int win;
1248
1249 NEXT_ARG();
1250 if (strcmp(*argv, "lock") == 0) {
1251 mxlock |= (1<<RTAX_INITRWND);
1252 NEXT_ARG();
1253 }
1254 if (get_unsigned(&win, *argv, 0))
1255 invarg("\"initrwnd\" value is invalid\n", *argv);
1256 rta_addattr32(mxrta, sizeof(mxbuf),
1257 RTAX_INITRWND, win);
1258 } else if (matches(*argv, "features") == 0) {
1259 unsigned int features = 0;
1260
1261 while (argc > 0) {
1262 NEXT_ARG();
1263
1264 if (strcmp(*argv, "ecn") == 0)
1265 features |= RTAX_FEATURE_ECN;
1266 else
1267 invarg("\"features\" value not valid\n", *argv);
1268 break;
1269 }
1270
1271 rta_addattr32(mxrta, sizeof(mxbuf),
1272 RTAX_FEATURES, features);
1273 } else if (matches(*argv, "quickack") == 0) {
1274 unsigned int quickack;
1275
1276 NEXT_ARG();
1277 if (get_unsigned(&quickack, *argv, 0))
1278 invarg("\"quickack\" value is invalid\n", *argv);
1279 if (quickack != 1 && quickack != 0)
1280 invarg("\"quickack\" value should be 0 or 1\n", *argv);
1281 rta_addattr32(mxrta, sizeof(mxbuf),
1282 RTAX_QUICKACK, quickack);
1283 } else if (matches(*argv, "congctl") == 0) {
1284 NEXT_ARG();
1285 if (strcmp(*argv, "lock") == 0) {
1286 mxlock |= 1 << RTAX_CC_ALGO;
1287 NEXT_ARG();
1288 }
1289 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1290 strlen(*argv));
1291 } else if (matches(*argv, "rttvar") == 0) {
1292 unsigned int win;
1293
1294 NEXT_ARG();
1295 if (strcmp(*argv, "lock") == 0) {
1296 mxlock |= (1<<RTAX_RTTVAR);
1297 NEXT_ARG();
1298 }
1299 if (get_time_rtt(&win, *argv, &raw))
1300 invarg("\"rttvar\" value is invalid\n", *argv);
1301 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1302 (raw) ? win : win * 4);
1303 } else if (matches(*argv, "ssthresh") == 0) {
1304 unsigned int win;
1305
1306 NEXT_ARG();
1307 if (strcmp(*argv, "lock") == 0) {
1308 mxlock |= (1<<RTAX_SSTHRESH);
1309 NEXT_ARG();
1310 }
1311 if (get_unsigned(&win, *argv, 0))
1312 invarg("\"ssthresh\" value is invalid\n", *argv);
1313 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1314 } else if (matches(*argv, "realms") == 0) {
1315 __u32 realm;
1316
1317 NEXT_ARG();
1318 if (get_rt_realms_or_raw(&realm, *argv))
1319 invarg("\"realm\" value is invalid\n", *argv);
1320 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1321 } else if (strcmp(*argv, "onlink") == 0) {
1322 req.r.rtm_flags |= RTNH_F_ONLINK;
1323 } else if (strcmp(*argv, "nexthop") == 0) {
1324 nhs_ok = 1;
1325 break;
1326 } else if (matches(*argv, "protocol") == 0) {
1327 __u32 prot;
1328
1329 NEXT_ARG();
1330 if (rtnl_rtprot_a2n(&prot, *argv))
1331 invarg("\"protocol\" value is invalid\n", *argv);
1332 req.r.rtm_protocol = prot;
1333 } else if (matches(*argv, "table") == 0) {
1334 __u32 tid;
1335
1336 NEXT_ARG();
1337 if (rtnl_rttable_a2n(&tid, *argv))
1338 invarg("\"table\" value is invalid\n", *argv);
1339 if (tid < 256)
1340 req.r.rtm_table = tid;
1341 else {
1342 req.r.rtm_table = RT_TABLE_UNSPEC;
1343 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1344 }
1345 table_ok = 1;
1346 } else if (matches(*argv, "vrf") == 0) {
1347 __u32 tid;
1348
1349 NEXT_ARG();
1350 tid = ipvrf_get_table(*argv);
1351 if (tid == 0)
1352 invarg("Invalid VRF\n", *argv);
1353 if (tid < 256)
1354 req.r.rtm_table = tid;
1355 else {
1356 req.r.rtm_table = RT_TABLE_UNSPEC;
1357 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1358 }
1359 table_ok = 1;
1360 } else if (strcmp(*argv, "dev") == 0 ||
1361 strcmp(*argv, "oif") == 0) {
1362 NEXT_ARG();
1363 d = *argv;
1364 } else if (matches(*argv, "pref") == 0) {
1365 __u8 pref;
1366
1367 NEXT_ARG();
1368 if (strcmp(*argv, "low") == 0)
1369 pref = ICMPV6_ROUTER_PREF_LOW;
1370 else if (strcmp(*argv, "medium") == 0)
1371 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1372 else if (strcmp(*argv, "high") == 0)
1373 pref = ICMPV6_ROUTER_PREF_HIGH;
1374 else if (get_u8(&pref, *argv, 0))
1375 invarg("\"pref\" value is invalid\n", *argv);
1376 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1377 } else if (strcmp(*argv, "encap") == 0) {
1378 char buf[1024];
1379 struct rtattr *rta = (void *)buf;
1380
1381 rta->rta_type = RTA_ENCAP;
1382 rta->rta_len = RTA_LENGTH(0);
1383
1384 lwt_parse_encap(rta, sizeof(buf), &argc, &argv);
1385
1386 if (rta->rta_len > RTA_LENGTH(0))
1387 addraw_l(&req.n, 1024
1388 , RTA_DATA(rta), RTA_PAYLOAD(rta));
1389 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1390 __u8 ttl_prop;
1391
1392 NEXT_ARG();
1393 if (matches(*argv, "enabled") == 0)
1394 ttl_prop = 1;
1395 else if (matches(*argv, "disabled") == 0)
1396 ttl_prop = 0;
1397 else
1398 invarg("\"ttl-propagate\" value is invalid\n",
1399 *argv);
1400
1401 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1402 ttl_prop);
1403 } else if (matches(*argv, "fastopen_no_cookie") == 0) {
1404 unsigned int fastopen_no_cookie;
1405
1406 NEXT_ARG();
1407 if (get_unsigned(&fastopen_no_cookie, *argv, 0))
1408 invarg("\"fastopen_no_cookie\" value is invalid\n", *argv);
1409 if (fastopen_no_cookie != 1 && fastopen_no_cookie != 0)
1410 invarg("\"fastopen_no_cookie\" value should be 0 or 1\n", *argv);
1411 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FASTOPEN_NO_COOKIE, fastopen_no_cookie);
1412 } else {
1413 int type;
1414 inet_prefix dst;
1415
1416 if (strcmp(*argv, "to") == 0) {
1417 NEXT_ARG();
1418 }
1419 if ((**argv < '0' || **argv > '9') &&
1420 rtnl_rtntype_a2n(&type, *argv) == 0) {
1421 NEXT_ARG();
1422 req.r.rtm_type = type;
1423 type_ok = 1;
1424 }
1425
1426 if (matches(*argv, "help") == 0)
1427 usage();
1428 if (dst_ok)
1429 duparg2("to", *argv);
1430 get_prefix(&dst, *argv, req.r.rtm_family);
1431 if (req.r.rtm_family == AF_UNSPEC)
1432 req.r.rtm_family = dst.family;
1433 req.r.rtm_dst_len = dst.bitlen;
1434 dst_ok = 1;
1435 if (dst.bytelen)
1436 addattr_l(&req.n, sizeof(req),
1437 RTA_DST, &dst.data, dst.bytelen);
1438 }
1439 argc--; argv++;
1440 }
1441
1442 if (!dst_ok)
1443 usage();
1444
1445 if (d) {
1446 int idx = ll_name_to_index(d);
1447
1448 if (!idx)
1449 return nodev(d);
1450 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1451 }
1452
1453 if (mxrta->rta_len > RTA_LENGTH(0)) {
1454 if (mxlock)
1455 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1456 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1457 }
1458
1459 if (nhs_ok)
1460 parse_nexthops(&req.n, &req.r, argc, argv);
1461
1462 if (req.r.rtm_family == AF_UNSPEC)
1463 req.r.rtm_family = AF_INET;
1464
1465 if (!table_ok) {
1466 if (req.r.rtm_type == RTN_LOCAL ||
1467 req.r.rtm_type == RTN_BROADCAST ||
1468 req.r.rtm_type == RTN_NAT ||
1469 req.r.rtm_type == RTN_ANYCAST)
1470 req.r.rtm_table = RT_TABLE_LOCAL;
1471 }
1472 if (!scope_ok) {
1473 if (req.r.rtm_family == AF_INET6 ||
1474 req.r.rtm_family == AF_MPLS)
1475 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1476 else if (req.r.rtm_type == RTN_LOCAL ||
1477 req.r.rtm_type == RTN_NAT)
1478 req.r.rtm_scope = RT_SCOPE_HOST;
1479 else if (req.r.rtm_type == RTN_BROADCAST ||
1480 req.r.rtm_type == RTN_MULTICAST ||
1481 req.r.rtm_type == RTN_ANYCAST)
1482 req.r.rtm_scope = RT_SCOPE_LINK;
1483 else if (req.r.rtm_type == RTN_UNICAST ||
1484 req.r.rtm_type == RTN_UNSPEC) {
1485 if (cmd == RTM_DELROUTE)
1486 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1487 else if (!gw_ok && !nhs_ok)
1488 req.r.rtm_scope = RT_SCOPE_LINK;
1489 }
1490 }
1491
1492 if (!type_ok && req.r.rtm_family == AF_MPLS)
1493 req.r.rtm_type = RTN_UNICAST;
1494
1495 if (rtnl_talk(&rth, &req.n, NULL) < 0)
1496 return -2;
1497
1498 return 0;
1499 }
1500
1501 static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
1502 {
1503 struct {
1504 struct nlmsghdr nlh;
1505 struct rtmsg rtm;
1506 } req = {
1507 .nlh.nlmsg_len = sizeof(req),
1508 .nlh.nlmsg_type = RTM_GETROUTE,
1509 .nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST,
1510 .nlh.nlmsg_seq = rth->dump = ++rth->seq,
1511 .rtm.rtm_family = family,
1512 .rtm.rtm_flags = RTM_F_CLONED,
1513 };
1514 struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
1515
1516 return sendto(rth->fd, (void *)&req, sizeof(req), 0, (struct sockaddr *)&nladdr, sizeof(nladdr));
1517 }
1518
1519 static int iproute_flush_cache(void)
1520 {
1521 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1522
1523 int len;
1524 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1525 char *buffer = "-1";
1526
1527 if (flush_fd < 0) {
1528 fprintf(stderr, "Cannot open \"%s\": %s\n",
1529 ROUTE_FLUSH_PATH, strerror(errno));
1530 return -1;
1531 }
1532
1533 len = strlen(buffer);
1534
1535 if ((write(flush_fd, (void *)buffer, len)) < len) {
1536 fprintf(stderr, "Cannot flush routing cache\n");
1537 close(flush_fd);
1538 return -1;
1539 }
1540 close(flush_fd);
1541 return 0;
1542 }
1543
1544 static __u32 route_dump_magic = 0x45311224;
1545
1546 static int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n,
1547 void *arg)
1548 {
1549 int ret;
1550 int len = n->nlmsg_len;
1551 struct rtmsg *r = NLMSG_DATA(n);
1552 struct rtattr *tb[RTA_MAX+1];
1553 int host_len;
1554
1555 host_len = af_bit_len(r->rtm_family);
1556 len -= NLMSG_LENGTH(sizeof(*r));
1557 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1558
1559 if (!filter_nlmsg(n, tb, host_len))
1560 return 0;
1561
1562 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1563 if ((ret > 0) && (ret != n->nlmsg_len)) {
1564 fprintf(stderr, "Short write while saving nlmsg\n");
1565 ret = -EIO;
1566 }
1567
1568 return ret == n->nlmsg_len ? 0 : ret;
1569 }
1570
1571 static int save_route_prep(void)
1572 {
1573 int ret;
1574
1575 if (isatty(STDOUT_FILENO)) {
1576 fprintf(stderr, "Not sending a binary stream to stdout\n");
1577 return -1;
1578 }
1579
1580 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1581 if (ret != sizeof(route_dump_magic)) {
1582 fprintf(stderr, "Can't write magic to dump file\n");
1583 return -1;
1584 }
1585
1586 return 0;
1587 }
1588
1589 static int iproute_flush(int do_ipv6, rtnl_filter_t filter_fn)
1590 {
1591 time_t start = time(0);
1592 char flushb[4096-512];
1593 int round = 0;
1594 int ret;
1595
1596 if (filter.cloned) {
1597 if (do_ipv6 != AF_INET6) {
1598 iproute_flush_cache();
1599 if (show_stats)
1600 printf("*** IPv4 routing cache is flushed.\n");
1601 }
1602 if (do_ipv6 == AF_INET)
1603 return 0;
1604 }
1605
1606 filter.flushb = flushb;
1607 filter.flushp = 0;
1608 filter.flushe = sizeof(flushb);
1609
1610 for (;;) {
1611 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1612 perror("Cannot send dump request");
1613 return -2;
1614 }
1615 filter.flushed = 0;
1616 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1617 fprintf(stderr, "Flush terminated\n");
1618 return -2;
1619 }
1620 if (filter.flushed == 0) {
1621 if (show_stats) {
1622 if (round == 0 &&
1623 (!filter.cloned || do_ipv6 == AF_INET6))
1624 printf("Nothing to flush.\n");
1625 else
1626 printf("*** Flush is complete after %d round%s ***\n",
1627 round, round > 1 ? "s" : "");
1628 }
1629 fflush(stdout);
1630 return 0;
1631 }
1632 round++;
1633 ret = flush_update();
1634 if (ret < 0)
1635 return ret;
1636
1637 if (time(0) - start > 30) {
1638 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1639 (long)(time(0) - start), filter.flushed);
1640 return -1;
1641 }
1642
1643 if (show_stats) {
1644 printf("\n*** Round %d, deleting %d entries ***\n",
1645 round, filter.flushed);
1646 fflush(stdout);
1647 }
1648 }
1649 }
1650
1651 static int iproute_list_flush_or_save(int argc, char **argv, int action)
1652 {
1653 int do_ipv6 = preferred_family;
1654 char *id = NULL;
1655 char *od = NULL;
1656 unsigned int mark = 0;
1657 rtnl_filter_t filter_fn;
1658
1659 if (action == IPROUTE_SAVE) {
1660 if (save_route_prep())
1661 return -1;
1662
1663 filter_fn = save_route;
1664 } else
1665 filter_fn = print_route;
1666
1667 iproute_reset_filter(0);
1668 filter.tb = RT_TABLE_MAIN;
1669
1670 if ((action == IPROUTE_FLUSH) && argc <= 0) {
1671 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1672 return -1;
1673 }
1674
1675 while (argc > 0) {
1676 if (matches(*argv, "table") == 0) {
1677 __u32 tid;
1678
1679 NEXT_ARG();
1680 if (rtnl_rttable_a2n(&tid, *argv)) {
1681 if (strcmp(*argv, "all") == 0) {
1682 filter.tb = 0;
1683 } else if (strcmp(*argv, "cache") == 0) {
1684 filter.cloned = 1;
1685 } else if (strcmp(*argv, "help") == 0) {
1686 usage();
1687 } else {
1688 invarg("table id value is invalid\n", *argv);
1689 }
1690 } else
1691 filter.tb = tid;
1692 } else if (matches(*argv, "vrf") == 0) {
1693 __u32 tid;
1694
1695 NEXT_ARG();
1696 tid = ipvrf_get_table(*argv);
1697 if (tid == 0)
1698 invarg("Invalid VRF\n", *argv);
1699 filter.tb = tid;
1700 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1701 } else if (matches(*argv, "cached") == 0 ||
1702 matches(*argv, "cloned") == 0) {
1703 filter.cloned = 1;
1704 } else if (strcmp(*argv, "tos") == 0 ||
1705 matches(*argv, "dsfield") == 0) {
1706 __u32 tos;
1707
1708 NEXT_ARG();
1709 if (rtnl_dsfield_a2n(&tos, *argv))
1710 invarg("TOS value is invalid\n", *argv);
1711 filter.tos = tos;
1712 filter.tosmask = -1;
1713 } else if (matches(*argv, "protocol") == 0) {
1714 __u32 prot = 0;
1715
1716 NEXT_ARG();
1717 filter.protocolmask = -1;
1718 if (rtnl_rtprot_a2n(&prot, *argv)) {
1719 if (strcmp(*argv, "all") != 0)
1720 invarg("invalid \"protocol\"\n", *argv);
1721 prot = 0;
1722 filter.protocolmask = 0;
1723 }
1724 filter.protocol = prot;
1725 } else if (matches(*argv, "scope") == 0) {
1726 __u32 scope = 0;
1727
1728 NEXT_ARG();
1729 filter.scopemask = -1;
1730 if (rtnl_rtscope_a2n(&scope, *argv)) {
1731 if (strcmp(*argv, "all") != 0)
1732 invarg("invalid \"scope\"\n", *argv);
1733 scope = RT_SCOPE_NOWHERE;
1734 filter.scopemask = 0;
1735 }
1736 filter.scope = scope;
1737 } else if (matches(*argv, "type") == 0) {
1738 int type;
1739
1740 NEXT_ARG();
1741 if (rtnl_rtntype_a2n(&type, *argv))
1742 invarg("node type value is invalid\n", *argv);
1743 filter.typemask = (1<<type);
1744 } else if (strcmp(*argv, "dev") == 0 ||
1745 strcmp(*argv, "oif") == 0) {
1746 NEXT_ARG();
1747 od = *argv;
1748 } else if (strcmp(*argv, "iif") == 0) {
1749 NEXT_ARG();
1750 id = *argv;
1751 } else if (strcmp(*argv, "mark") == 0) {
1752 NEXT_ARG();
1753 if (get_unsigned(&mark, *argv, 0))
1754 invarg("invalid mark value", *argv);
1755 filter.markmask = -1;
1756 } else if (matches(*argv, "metric") == 0 ||
1757 matches(*argv, "priority") == 0 ||
1758 strcmp(*argv, "preference") == 0) {
1759 __u32 metric;
1760
1761 NEXT_ARG();
1762 if (get_u32(&metric, *argv, 0))
1763 invarg("\"metric\" value is invalid\n", *argv);
1764 filter.metric = metric;
1765 filter.metricmask = -1;
1766 } else if (strcmp(*argv, "via") == 0) {
1767 int family;
1768
1769 NEXT_ARG();
1770 family = read_family(*argv);
1771 if (family == AF_UNSPEC)
1772 family = do_ipv6;
1773 else
1774 NEXT_ARG();
1775 get_prefix(&filter.rvia, *argv, family);
1776 } else if (strcmp(*argv, "src") == 0) {
1777 NEXT_ARG();
1778 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1779 } else if (matches(*argv, "realms") == 0) {
1780 __u32 realm;
1781
1782 NEXT_ARG();
1783 if (get_rt_realms_or_raw(&realm, *argv))
1784 invarg("invalid realms\n", *argv);
1785 filter.realm = realm;
1786 filter.realmmask = ~0U;
1787 if ((filter.realm&0xFFFF) == 0 &&
1788 (*argv)[strlen(*argv) - 1] == '/')
1789 filter.realmmask &= ~0xFFFF;
1790 if ((filter.realm&0xFFFF0000U) == 0 &&
1791 (strchr(*argv, '/') == NULL ||
1792 (*argv)[0] == '/'))
1793 filter.realmmask &= ~0xFFFF0000U;
1794 } else if (matches(*argv, "from") == 0) {
1795 NEXT_ARG();
1796 if (matches(*argv, "root") == 0) {
1797 NEXT_ARG();
1798 get_prefix(&filter.rsrc, *argv, do_ipv6);
1799 } else if (matches(*argv, "match") == 0) {
1800 NEXT_ARG();
1801 get_prefix(&filter.msrc, *argv, do_ipv6);
1802 } else {
1803 if (matches(*argv, "exact") == 0) {
1804 NEXT_ARG();
1805 }
1806 get_prefix(&filter.msrc, *argv, do_ipv6);
1807 filter.rsrc = filter.msrc;
1808 }
1809 } else {
1810 if (matches(*argv, "to") == 0) {
1811 NEXT_ARG();
1812 }
1813 if (matches(*argv, "root") == 0) {
1814 NEXT_ARG();
1815 get_prefix(&filter.rdst, *argv, do_ipv6);
1816 } else if (matches(*argv, "match") == 0) {
1817 NEXT_ARG();
1818 get_prefix(&filter.mdst, *argv, do_ipv6);
1819 } else {
1820 if (matches(*argv, "exact") == 0) {
1821 NEXT_ARG();
1822 }
1823 get_prefix(&filter.mdst, *argv, do_ipv6);
1824 filter.rdst = filter.mdst;
1825 }
1826 }
1827 argc--; argv++;
1828 }
1829
1830 if (do_ipv6 == AF_UNSPEC && filter.tb)
1831 do_ipv6 = AF_INET;
1832
1833 if (id || od) {
1834 int idx;
1835
1836 if (id) {
1837 idx = ll_name_to_index(id);
1838 if (!idx)
1839 return nodev(id);
1840 filter.iif = idx;
1841 filter.iifmask = -1;
1842 }
1843 if (od) {
1844 idx = ll_name_to_index(od);
1845 if (!idx)
1846 return nodev(od);
1847 filter.oif = idx;
1848 filter.oifmask = -1;
1849 }
1850 }
1851 filter.mark = mark;
1852
1853 if (action == IPROUTE_FLUSH)
1854 return iproute_flush(do_ipv6, filter_fn);
1855
1856 if (!filter.cloned) {
1857 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1858 perror("Cannot send dump request");
1859 return -2;
1860 }
1861 } else {
1862 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1863 perror("Cannot send dump request");
1864 return -2;
1865 }
1866 }
1867
1868 new_json_obj(json);
1869
1870 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1871 fprintf(stderr, "Dump terminated\n");
1872 return -2;
1873 }
1874
1875 delete_json_obj();
1876 fflush(stdout);
1877 return 0;
1878 }
1879
1880
1881 static int iproute_get(int argc, char **argv)
1882 {
1883 struct {
1884 struct nlmsghdr n;
1885 struct rtmsg r;
1886 char buf[1024];
1887 } req = {
1888 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1889 .n.nlmsg_flags = NLM_F_REQUEST,
1890 .n.nlmsg_type = RTM_GETROUTE,
1891 .r.rtm_family = preferred_family,
1892 };
1893 char *idev = NULL;
1894 char *odev = NULL;
1895 struct nlmsghdr *answer;
1896 int connected = 0;
1897 int fib_match = 0;
1898 int from_ok = 0;
1899 unsigned int mark = 0;
1900
1901 iproute_reset_filter(0);
1902 filter.cloned = 2;
1903
1904 while (argc > 0) {
1905 if (strcmp(*argv, "tos") == 0 ||
1906 matches(*argv, "dsfield") == 0) {
1907 __u32 tos;
1908
1909 NEXT_ARG();
1910 if (rtnl_dsfield_a2n(&tos, *argv))
1911 invarg("TOS value is invalid\n", *argv);
1912 req.r.rtm_tos = tos;
1913 } else if (matches(*argv, "from") == 0) {
1914 inet_prefix addr;
1915
1916 NEXT_ARG();
1917 if (matches(*argv, "help") == 0)
1918 usage();
1919 from_ok = 1;
1920 get_prefix(&addr, *argv, req.r.rtm_family);
1921 if (req.r.rtm_family == AF_UNSPEC)
1922 req.r.rtm_family = addr.family;
1923 if (addr.bytelen)
1924 addattr_l(&req.n, sizeof(req), RTA_SRC,
1925 &addr.data, addr.bytelen);
1926 req.r.rtm_src_len = addr.bitlen;
1927 } else if (matches(*argv, "iif") == 0) {
1928 NEXT_ARG();
1929 idev = *argv;
1930 } else if (matches(*argv, "mark") == 0) {
1931 NEXT_ARG();
1932 if (get_unsigned(&mark, *argv, 0))
1933 invarg("invalid mark value", *argv);
1934 } else if (matches(*argv, "oif") == 0 ||
1935 strcmp(*argv, "dev") == 0) {
1936 NEXT_ARG();
1937 odev = *argv;
1938 } else if (matches(*argv, "notify") == 0) {
1939 req.r.rtm_flags |= RTM_F_NOTIFY;
1940 } else if (matches(*argv, "connected") == 0) {
1941 connected = 1;
1942 } else if (matches(*argv, "vrf") == 0) {
1943 NEXT_ARG();
1944 if (!name_is_vrf(*argv))
1945 invarg("Invalid VRF\n", *argv);
1946 odev = *argv;
1947 } else if (matches(*argv, "uid") == 0) {
1948 uid_t uid;
1949
1950 NEXT_ARG();
1951 if (get_unsigned(&uid, *argv, 0))
1952 invarg("invalid UID\n", *argv);
1953 addattr32(&req.n, sizeof(req), RTA_UID, uid);
1954 } else if (matches(*argv, "fibmatch") == 0) {
1955 fib_match = 1;
1956 } else if (strcmp(*argv, "as") == 0) {
1957 inet_prefix addr;
1958
1959 NEXT_ARG();
1960 if (strcmp(*argv, "to") == 0)
1961 NEXT_ARG();
1962 get_addr(&addr, *argv, req.r.rtm_family);
1963 if (req.r.rtm_family == AF_UNSPEC)
1964 req.r.rtm_family = addr.family;
1965 addattr_l(&req.n, sizeof(req), RTA_NEWDST,
1966 &addr.data, addr.bytelen);
1967 } else {
1968 inet_prefix addr;
1969
1970 if (strcmp(*argv, "to") == 0) {
1971 NEXT_ARG();
1972 }
1973 if (matches(*argv, "help") == 0)
1974 usage();
1975 get_prefix(&addr, *argv, req.r.rtm_family);
1976 if (req.r.rtm_family == AF_UNSPEC)
1977 req.r.rtm_family = addr.family;
1978 if (addr.bytelen)
1979 addattr_l(&req.n, sizeof(req),
1980 RTA_DST, &addr.data, addr.bytelen);
1981 req.r.rtm_dst_len = addr.bitlen;
1982 }
1983 argc--; argv++;
1984 }
1985
1986 if (req.r.rtm_dst_len == 0) {
1987 fprintf(stderr, "need at least a destination address\n");
1988 return -1;
1989 }
1990
1991 if (idev || odev) {
1992 int idx;
1993
1994 if (idev) {
1995 idx = ll_name_to_index(idev);
1996 if (!idx)
1997 return nodev(idev);
1998 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
1999 }
2000 if (odev) {
2001 idx = ll_name_to_index(odev);
2002 if (!idx)
2003 return nodev(odev);
2004 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
2005 }
2006 }
2007 if (mark)
2008 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
2009
2010 if (req.r.rtm_family == AF_UNSPEC)
2011 req.r.rtm_family = AF_INET;
2012
2013 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
2014 if (fib_match)
2015 req.r.rtm_flags |= RTM_F_FIB_MATCH;
2016
2017 if (rtnl_talk(&rth, &req.n, &answer) < 0)
2018 return -2;
2019
2020 if (connected && !from_ok) {
2021 struct rtmsg *r = NLMSG_DATA(answer);
2022 int len = answer->nlmsg_len;
2023 struct rtattr *tb[RTA_MAX+1];
2024
2025 if (print_route(NULL, answer, (void *)stdout) < 0) {
2026 fprintf(stderr, "An error :-)\n");
2027 free(answer);
2028 return -1;
2029 }
2030
2031 if (answer->nlmsg_type != RTM_NEWROUTE) {
2032 fprintf(stderr, "Not a route?\n");
2033 free(answer);
2034 return -1;
2035 }
2036 len -= NLMSG_LENGTH(sizeof(*r));
2037 if (len < 0) {
2038 fprintf(stderr, "Wrong len %d\n", len);
2039 free(answer);
2040 return -1;
2041 }
2042
2043 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2044
2045 if (tb[RTA_PREFSRC]) {
2046 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
2047 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
2048 } else if (!tb[RTA_SRC]) {
2049 fprintf(stderr, "Failed to connect the route\n");
2050 free(answer);
2051 return -1;
2052 }
2053 if (!odev && tb[RTA_OIF])
2054 tb[RTA_OIF]->rta_type = 0;
2055 if (tb[RTA_GATEWAY])
2056 tb[RTA_GATEWAY]->rta_type = 0;
2057 if (tb[RTA_VIA])
2058 tb[RTA_VIA]->rta_type = 0;
2059 if (!idev && tb[RTA_IIF])
2060 tb[RTA_IIF]->rta_type = 0;
2061 req.n.nlmsg_flags = NLM_F_REQUEST;
2062 req.n.nlmsg_type = RTM_GETROUTE;
2063
2064 free(answer);
2065 if (rtnl_talk(&rth, &req.n, &answer) < 0)
2066 return -2;
2067 }
2068
2069 if (print_route(NULL, answer, (void *)stdout) < 0) {
2070 fprintf(stderr, "An error :-)\n");
2071 free(answer);
2072 return -1;
2073 }
2074
2075 free(answer);
2076 return 0;
2077 }
2078
2079 static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
2080 {
2081 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
2082 return 1;
2083
2084 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
2085 }
2086
2087 static int restore_handler(const struct sockaddr_nl *nl,
2088 struct rtnl_ctrl_data *ctrl,
2089 struct nlmsghdr *n, void *arg)
2090 {
2091 struct rtmsg *r = NLMSG_DATA(n);
2092 struct rtattr *tb[RTA_MAX+1];
2093 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
2094 int ret, prio = *(int *)arg;
2095
2096 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2097
2098 /* Restore routes in correct order:
2099 * 0. ones for local addresses,
2100 * 1. ones for local networks,
2101 * 2. others (remote networks/hosts).
2102 */
2103 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
2104 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
2105 goto restore;
2106 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
2107 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
2108 goto restore;
2109 else if (prio == 2 && tb[RTA_GATEWAY])
2110 goto restore;
2111
2112 return 0;
2113
2114 restore:
2115 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
2116
2117 ll_init_map(&rth);
2118
2119 ret = rtnl_talk(&rth, n, NULL);
2120 if ((ret < 0) && (errno == EEXIST))
2121 ret = 0;
2122
2123 return ret;
2124 }
2125
2126 static int route_dump_check_magic(void)
2127 {
2128 int ret;
2129 __u32 magic = 0;
2130
2131 if (isatty(STDIN_FILENO)) {
2132 fprintf(stderr, "Can't restore route dump from a terminal\n");
2133 return -1;
2134 }
2135
2136 ret = fread(&magic, sizeof(magic), 1, stdin);
2137 if (magic != route_dump_magic) {
2138 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
2139 return -1;
2140 }
2141
2142 return 0;
2143 }
2144
2145 static int iproute_restore(void)
2146 {
2147 int pos, prio;
2148
2149 if (route_dump_check_magic())
2150 return -1;
2151
2152 pos = ftell(stdin);
2153 if (pos == -1) {
2154 perror("Failed to restore: ftell");
2155 return -1;
2156 }
2157
2158 for (prio = 0; prio < 3; prio++) {
2159 int err;
2160
2161 err = rtnl_from_file(stdin, &restore_handler, &prio);
2162 if (err)
2163 return -2;
2164
2165 if (fseek(stdin, pos, SEEK_SET) == -1) {
2166 perror("Failed to restore: fseek");
2167 return -1;
2168 }
2169 }
2170
2171 return 0;
2172 }
2173
2174 static int show_handler(const struct sockaddr_nl *nl,
2175 struct rtnl_ctrl_data *ctrl,
2176 struct nlmsghdr *n, void *arg)
2177 {
2178 print_route(nl, n, stdout);
2179 return 0;
2180 }
2181
2182 static int iproute_showdump(void)
2183 {
2184 if (route_dump_check_magic())
2185 return -1;
2186
2187 if (rtnl_from_file(stdin, &show_handler, NULL))
2188 return -2;
2189
2190 return 0;
2191 }
2192
2193 void iproute_reset_filter(int ifindex)
2194 {
2195 memset(&filter, 0, sizeof(filter));
2196 filter.mdst.bitlen = -1;
2197 filter.msrc.bitlen = -1;
2198 filter.oif = ifindex;
2199 if (filter.oif > 0)
2200 filter.oifmask = -1;
2201 }
2202
2203 int do_iproute(int argc, char **argv)
2204 {
2205 if (argc < 1)
2206 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
2207
2208 if (matches(*argv, "add") == 0)
2209 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
2210 argc-1, argv+1);
2211 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
2212 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
2213 argc-1, argv+1);
2214 if (matches(*argv, "replace") == 0)
2215 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
2216 argc-1, argv+1);
2217 if (matches(*argv, "prepend") == 0)
2218 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
2219 argc-1, argv+1);
2220 if (matches(*argv, "append") == 0)
2221 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
2222 argc-1, argv+1);
2223 if (matches(*argv, "test") == 0)
2224 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
2225 argc-1, argv+1);
2226 if (matches(*argv, "delete") == 0)
2227 return iproute_modify(RTM_DELROUTE, 0,
2228 argc-1, argv+1);
2229 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2230 || matches(*argv, "lst") == 0)
2231 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
2232 if (matches(*argv, "get") == 0)
2233 return iproute_get(argc-1, argv+1);
2234 if (matches(*argv, "flush") == 0)
2235 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2236 if (matches(*argv, "save") == 0)
2237 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2238 if (matches(*argv, "restore") == 0)
2239 return iproute_restore();
2240 if (matches(*argv, "showdump") == 0)
2241 return iproute_showdump();
2242 if (matches(*argv, "help") == 0)
2243 usage();
2244
2245 fprintf(stderr,
2246 "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
2247 exit(-1);
2248 }
Upstream mirror of iproute2