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ip route: Print "rt_offload" and "rt_trap" indication
[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 ] [ ipproto PROTOCOL ]\n"
73 " [ sport NUMBER ] [ dport NUMBER ]\n"
74 " ip route { add | del | change | append | replace } ROUTE\n"
75 "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"
76 " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n"
77 " [ type TYPE ] [ scope SCOPE ]\n"
78 "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"
79 "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"
80 " [ table TABLE_ID ] [ proto RTPROTO ]\n"
81 " [ scope SCOPE ] [ metric METRIC ]\n"
82 " [ ttl-propagate { enabled | disabled } ]\n"
83 "INFO_SPEC := { NH | nhid ID } OPTIONS FLAGS [ nexthop NH ]...\n"
84 "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n"
85 " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"
86 "FAMILY := [ inet | inet6 | mpls | bridge | link ]\n"
87 "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n"
88 " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n"
89 " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"
90 " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"
91 " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n"
92 " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n"
93 " [ pref PREF ] [ expires TIME ] [ fastopen_no_cookie BOOL ]\n"
94 "TYPE := { unicast | local | broadcast | multicast | throw |\n"
95 " unreachable | prohibit | blackhole | nat }\n"
96 "TABLE_ID := [ local | main | default | all | NUMBER ]\n"
97 "SCOPE := [ host | link | global | NUMBER ]\n"
98 "NHFLAGS := [ onlink | pervasive ]\n"
99 "RTPROTO := [ kernel | boot | static | NUMBER ]\n"
100 "PREF := [ low | medium | high ]\n"
101 "TIME := NUMBER[s|ms]\n"
102 "BOOL := [1|0]\n"
103 "FEATURES := ecn\n"
104 "ENCAPTYPE := [ mpls | ip | ip6 | seg6 | seg6local ]\n"
105 "ENCAPHDR := [ MPLSLABEL | SEG6HDR ]\n"
106 "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n"
107 "SEGMODE := [ encap | inline ]\n"
108 "ROUTE_GET_FLAGS := [ fibmatch ]\n");
109 exit(-1);
110 }
111
112
113 static struct
114 {
115 unsigned int tb;
116 int cloned;
117 int flushed;
118 char *flushb;
119 int flushp;
120 int flushe;
121 int protocol, protocolmask;
122 int scope, scopemask;
123 __u64 typemask;
124 int tos, tosmask;
125 int iif, iifmask;
126 int oif, oifmask;
127 int mark, markmask;
128 int realm, realmmask;
129 __u32 metric, metricmask;
130 inet_prefix rprefsrc;
131 inet_prefix rvia;
132 inet_prefix rdst;
133 inet_prefix mdst;
134 inet_prefix rsrc;
135 inet_prefix msrc;
136 } filter;
137
138 static int flush_update(void)
139 {
140 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
141 perror("Failed to send flush request");
142 return -2;
143 }
144 filter.flushp = 0;
145 return 0;
146 }
147
148 static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
149 {
150 struct rtmsg *r = NLMSG_DATA(n);
151 inet_prefix dst = { .family = r->rtm_family };
152 inet_prefix src = { .family = r->rtm_family };
153 inet_prefix via = { .family = r->rtm_family };
154 inet_prefix prefsrc = { .family = r->rtm_family };
155 __u32 table;
156 static int ip6_multiple_tables;
157
158 table = rtm_get_table(r, tb);
159
160 if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
161 return 0;
162
163 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
164 ip6_multiple_tables = 1;
165
166 if (filter.cloned == !(r->rtm_flags & RTM_F_CLONED))
167 return 0;
168
169 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
170 if (filter.tb) {
171 if (filter.tb == RT_TABLE_LOCAL) {
172 if (r->rtm_type != RTN_LOCAL)
173 return 0;
174 } else if (filter.tb == RT_TABLE_MAIN) {
175 if (r->rtm_type == RTN_LOCAL)
176 return 0;
177 } else {
178 return 0;
179 }
180 }
181 } else {
182 if (filter.tb > 0 && filter.tb != table)
183 return 0;
184 }
185 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
186 return 0;
187 if ((filter.scope^r->rtm_scope)&filter.scopemask)
188 return 0;
189
190 if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
191 return 0;
192 if ((filter.tos^r->rtm_tos)&filter.tosmask)
193 return 0;
194 if (filter.rdst.family) {
195 if (r->rtm_family != filter.rdst.family ||
196 filter.rdst.bitlen > r->rtm_dst_len)
197 return 0;
198 } else if (filter.rdst.flags & PREFIXLEN_SPECIFIED) {
199 if (filter.rdst.bitlen > r->rtm_dst_len)
200 return 0;
201 }
202 if (filter.mdst.family) {
203 if (r->rtm_family != filter.mdst.family ||
204 (filter.mdst.bitlen >= 0 &&
205 filter.mdst.bitlen < r->rtm_dst_len))
206 return 0;
207 } else if (filter.mdst.flags & PREFIXLEN_SPECIFIED) {
208 if (filter.mdst.bitlen >= 0 &&
209 filter.mdst.bitlen < r->rtm_dst_len)
210 return 0;
211 }
212 if (filter.rsrc.family) {
213 if (r->rtm_family != filter.rsrc.family ||
214 filter.rsrc.bitlen > r->rtm_src_len)
215 return 0;
216 } else if (filter.rsrc.flags & PREFIXLEN_SPECIFIED) {
217 if (filter.rsrc.bitlen > r->rtm_src_len)
218 return 0;
219 }
220 if (filter.msrc.family) {
221 if (r->rtm_family != filter.msrc.family ||
222 (filter.msrc.bitlen >= 0 &&
223 filter.msrc.bitlen < r->rtm_src_len))
224 return 0;
225 } else if (filter.msrc.flags & PREFIXLEN_SPECIFIED) {
226 if (filter.msrc.bitlen >= 0 &&
227 filter.msrc.bitlen < r->rtm_src_len)
228 return 0;
229 }
230 if (filter.rvia.family) {
231 int family = r->rtm_family;
232
233 if (tb[RTA_VIA]) {
234 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
235
236 family = via->rtvia_family;
237 }
238 if (family != filter.rvia.family)
239 return 0;
240 }
241 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
242 return 0;
243
244 if (tb[RTA_DST])
245 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
246 if (filter.rsrc.family || filter.msrc.family ||
247 filter.rsrc.flags & PREFIXLEN_SPECIFIED ||
248 filter.msrc.flags & PREFIXLEN_SPECIFIED) {
249 if (tb[RTA_SRC])
250 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
251 }
252 if (filter.rvia.bitlen > 0) {
253 if (tb[RTA_GATEWAY])
254 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
255 if (tb[RTA_VIA]) {
256 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
257 struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
258
259 via.family = rtvia->rtvia_family;
260 memcpy(&via.data, rtvia->rtvia_addr, len);
261 }
262 }
263 if (filter.rprefsrc.bitlen > 0) {
264 if (tb[RTA_PREFSRC])
265 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
266 }
267
268 if ((filter.rdst.family || filter.rdst.flags & PREFIXLEN_SPECIFIED) &&
269 inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
270 return 0;
271 if ((filter.mdst.family || filter.mdst.flags & PREFIXLEN_SPECIFIED) &&
272 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
273 return 0;
274
275 if ((filter.rsrc.family || filter.rsrc.flags & PREFIXLEN_SPECIFIED) &&
276 inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
277 return 0;
278 if ((filter.msrc.family || filter.msrc.flags & PREFIXLEN_SPECIFIED) &&
279 filter.msrc.bitlen >= 0 &&
280 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
281 return 0;
282
283 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
284 return 0;
285 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
286 return 0;
287 if (filter.realmmask) {
288 __u32 realms = 0;
289
290 if (tb[RTA_FLOW])
291 realms = rta_getattr_u32(tb[RTA_FLOW]);
292 if ((realms^filter.realm)&filter.realmmask)
293 return 0;
294 }
295 if (filter.iifmask) {
296 int iif = 0;
297
298 if (tb[RTA_IIF])
299 iif = rta_getattr_u32(tb[RTA_IIF]);
300 if ((iif^filter.iif)&filter.iifmask)
301 return 0;
302 }
303 if (filter.oifmask) {
304 int oif = 0;
305
306 if (tb[RTA_OIF])
307 oif = rta_getattr_u32(tb[RTA_OIF]);
308 if ((oif^filter.oif)&filter.oifmask)
309 return 0;
310 }
311 if (filter.markmask) {
312 int mark = 0;
313
314 if (tb[RTA_MARK])
315 mark = rta_getattr_u32(tb[RTA_MARK]);
316 if ((mark ^ filter.mark) & filter.markmask)
317 return 0;
318 }
319 if (filter.metricmask) {
320 __u32 metric = 0;
321
322 if (tb[RTA_PRIORITY])
323 metric = rta_getattr_u32(tb[RTA_PRIORITY]);
324 if ((metric ^ filter.metric) & filter.metricmask)
325 return 0;
326 }
327 if (filter.flushb &&
328 r->rtm_family == AF_INET6 &&
329 r->rtm_dst_len == 0 &&
330 r->rtm_type == RTN_UNREACHABLE &&
331 tb[RTA_PRIORITY] &&
332 rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
333 return 0;
334
335 return 1;
336 }
337
338 static void print_rtax_features(FILE *fp, unsigned int features)
339 {
340 unsigned int of = features;
341
342 if (features & RTAX_FEATURE_ECN) {
343 print_null(PRINT_ANY, "ecn", "ecn ", NULL);
344 features &= ~RTAX_FEATURE_ECN;
345 }
346
347 if (features)
348 print_0xhex(PRINT_ANY,
349 "features", "%#llx ", of);
350 }
351
352 void print_rt_flags(FILE *fp, unsigned int flags)
353 {
354 open_json_array(PRINT_JSON,
355 is_json_context() ? "flags" : "");
356
357 if (flags & RTNH_F_DEAD)
358 print_string(PRINT_ANY, NULL, "%s ", "dead");
359 if (flags & RTNH_F_ONLINK)
360 print_string(PRINT_ANY, NULL, "%s ", "onlink");
361 if (flags & RTNH_F_PERVASIVE)
362 print_string(PRINT_ANY, NULL, "%s ", "pervasive");
363 if (flags & RTNH_F_OFFLOAD)
364 print_string(PRINT_ANY, NULL, "%s ", "offload");
365 if (flags & RTM_F_NOTIFY)
366 print_string(PRINT_ANY, NULL, "%s ", "notify");
367 if (flags & RTNH_F_LINKDOWN)
368 print_string(PRINT_ANY, NULL, "%s ", "linkdown");
369 if (flags & RTNH_F_UNRESOLVED)
370 print_string(PRINT_ANY, NULL, "%s ", "unresolved");
371 if (flags & RTM_F_OFFLOAD)
372 print_string(PRINT_ANY, NULL, "%s ", "rt_offload");
373 if (flags & RTM_F_TRAP)
374 print_string(PRINT_ANY, NULL, "%s ", "rt_trap");
375
376 close_json_array(PRINT_JSON, NULL);
377 }
378
379 static void print_rt_pref(FILE *fp, unsigned int pref)
380 {
381
382 switch (pref) {
383 case ICMPV6_ROUTER_PREF_LOW:
384 print_string(PRINT_ANY,
385 "pref", "pref %s", "low");
386 break;
387 case ICMPV6_ROUTER_PREF_MEDIUM:
388 print_string(PRINT_ANY,
389 "pref", "pref %s", "medium");
390 break;
391 case ICMPV6_ROUTER_PREF_HIGH:
392 print_string(PRINT_ANY,
393 "pref", "pref %s", "high");
394 break;
395 default:
396 print_uint(PRINT_ANY,
397 "pref", "%u", pref);
398 }
399 }
400
401 void print_rta_if(FILE *fp, const struct rtattr *rta, const char *prefix)
402 {
403 const char *ifname = ll_index_to_name(rta_getattr_u32(rta));
404
405 if (is_json_context())
406 print_string(PRINT_JSON, prefix, NULL, ifname);
407 else {
408 fprintf(fp, "%s ", prefix);
409 color_fprintf(fp, COLOR_IFNAME, "%s ", ifname);
410 }
411 }
412
413 static void print_cache_flags(FILE *fp, __u32 flags)
414 {
415 json_writer_t *jw = get_json_writer();
416 flags &= ~0xFFFF;
417
418 if (jw) {
419 jsonw_name(jw, "cache");
420 jsonw_start_array(jw);
421 } else {
422 fprintf(fp, "%s cache ", _SL_);
423 if (flags == 0)
424 return;
425 putc('<', fp);
426 }
427
428 #define PRTFL(fl, flname) \
429 if (flags & RTCF_##fl) { \
430 flags &= ~RTCF_##fl; \
431 if (jw) \
432 jsonw_string(jw, flname); \
433 else \
434 fprintf(fp, "%s%s", flname, flags ? "," : "> "); \
435 }
436
437 PRTFL(LOCAL, "local");
438 PRTFL(REJECT, "reject");
439 PRTFL(MULTICAST, "mc");
440 PRTFL(BROADCAST, "brd");
441 PRTFL(DNAT, "dst-nat");
442 PRTFL(SNAT, "src-nat");
443 PRTFL(MASQ, "masq");
444 PRTFL(DIRECTDST, "dst-direct");
445 PRTFL(DIRECTSRC, "src-direct");
446 PRTFL(REDIRECTED, "redirected");
447 PRTFL(DOREDIRECT, "redirect");
448 PRTFL(FAST, "fastroute");
449 PRTFL(NOTIFY, "notify");
450 PRTFL(TPROXY, "proxy");
451 #undef PRTFL
452
453 if (flags)
454 print_hex(PRINT_ANY, "flags", "%x>", flags);
455
456 if (jw)
457 jsonw_end_array(jw);
458 }
459
460 static void print_rta_cacheinfo(FILE *fp, const struct rta_cacheinfo *ci)
461 {
462 static int hz;
463
464 if (!hz)
465 hz = get_user_hz();
466
467 if (ci->rta_expires != 0)
468 print_int(PRINT_ANY, "expires",
469 "expires %dsec ", ci->rta_expires/hz);
470 if (ci->rta_error != 0)
471 print_uint(PRINT_ANY, "error",
472 "error %u ", ci->rta_error);
473
474 if (show_stats) {
475 if (ci->rta_clntref)
476 print_uint(PRINT_ANY, "users",
477 "users %u ", ci->rta_clntref);
478 if (ci->rta_used != 0)
479 print_uint(PRINT_ANY, "used",
480 "used %u ", ci->rta_used);
481 if (ci->rta_lastuse != 0)
482 print_uint(PRINT_ANY, "age",
483 "age %usec ", ci->rta_lastuse/hz);
484 }
485 if (ci->rta_id)
486 print_0xhex(PRINT_ANY, "ipid",
487 "ipid 0x%04llx ", ci->rta_id);
488 if (ci->rta_ts || ci->rta_tsage) {
489 print_0xhex(PRINT_ANY, "ts",
490 "ts 0x%llx", ci->rta_ts);
491 print_uint(PRINT_ANY, "tsage",
492 "tsage %usec ", ci->rta_tsage);
493 }
494 }
495
496 static void print_rta_flow(FILE *fp, const struct rtattr *rta)
497 {
498 __u32 to = rta_getattr_u32(rta);
499 __u32 from = to >> 16;
500 SPRINT_BUF(b1);
501
502 to &= 0xFFFF;
503 if (is_json_context()) {
504 open_json_object("flow");
505
506 if (from)
507 print_string(PRINT_JSON, "from", NULL,
508 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
509 print_string(PRINT_JSON, "to", NULL,
510 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
511 close_json_object();
512 } else {
513 fprintf(fp, "realm%s ", from ? "s" : "");
514
515 if (from)
516 print_string(PRINT_FP, NULL, "%s/",
517 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
518 print_string(PRINT_FP, NULL, "%s ",
519 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
520 }
521 }
522
523 static void print_rta_newdst(FILE *fp, const struct rtmsg *r,
524 const struct rtattr *rta)
525 {
526 const char *newdst = format_host_rta(r->rtm_family, rta);
527
528 if (is_json_context())
529 print_string(PRINT_JSON, "to", NULL, newdst);
530 else {
531 fprintf(fp, "as to ");
532 print_color_string(PRINT_FP,
533 ifa_family_color(r->rtm_family),
534 NULL, "%s ", newdst);
535 }
536 }
537
538 void print_rta_gateway(FILE *fp, unsigned char family, const struct rtattr *rta)
539 {
540 const char *gateway = format_host_rta(family, rta);
541
542 if (is_json_context())
543 print_string(PRINT_JSON, "gateway", NULL, gateway);
544 else {
545 fprintf(fp, "via ");
546 print_color_string(PRINT_FP,
547 ifa_family_color(family),
548 NULL, "%s ", gateway);
549 }
550 }
551
552 static void print_rta_via(FILE *fp, const struct rtattr *rta)
553 {
554 size_t len = RTA_PAYLOAD(rta) - 2;
555 const struct rtvia *via = RTA_DATA(rta);
556
557 if (is_json_context()) {
558 open_json_object("via");
559 print_string(PRINT_JSON, "family", NULL,
560 family_name(via->rtvia_family));
561 print_string(PRINT_JSON, "host", NULL,
562 format_host(via->rtvia_family, len,
563 via->rtvia_addr));
564 close_json_object();
565 } else {
566 print_string(PRINT_FP, NULL, "via %s ",
567 family_name(via->rtvia_family));
568 print_color_string(PRINT_FP,
569 ifa_family_color(via->rtvia_family),
570 NULL, "%s ",
571 format_host(via->rtvia_family,
572 len, via->rtvia_addr));
573 }
574 }
575
576 static void print_rta_metrics(FILE *fp, const struct rtattr *rta)
577 {
578 struct rtattr *mxrta[RTAX_MAX+1];
579 unsigned int mxlock = 0;
580 int i;
581
582 open_json_array(PRINT_JSON, "metrics");
583 open_json_object(NULL);
584
585 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta));
586
587 if (mxrta[RTAX_LOCK])
588 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
589
590 for (i = 2; i <= RTAX_MAX; i++) {
591 __u32 val = 0U;
592
593 if (mxrta[i] == NULL && !(mxlock & (1 << i)))
594 continue;
595
596 if (mxrta[i] != NULL && i != RTAX_CC_ALGO)
597 val = rta_getattr_u32(mxrta[i]);
598
599 if (i == RTAX_HOPLIMIT && (int)val == -1)
600 continue;
601
602 if (!is_json_context()) {
603 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
604 fprintf(fp, "%s ", mx_names[i]);
605 else
606 fprintf(fp, "metric %d ", i);
607
608 if (mxlock & (1<<i))
609 fprintf(fp, "lock ");
610 }
611
612 switch (i) {
613 case RTAX_FEATURES:
614 print_rtax_features(fp, val);
615 break;
616 default:
617 print_uint(PRINT_ANY, mx_names[i], "%u ", val);
618 break;
619
620 case RTAX_RTT:
621 case RTAX_RTTVAR:
622 case RTAX_RTO_MIN:
623 if (i == RTAX_RTT)
624 val /= 8;
625 else if (i == RTAX_RTTVAR)
626 val /= 4;
627
628 if (is_json_context())
629 print_uint(PRINT_JSON, mx_names[i],
630 NULL, val);
631 else {
632 if (val >= 1000)
633 fprintf(fp, "%gs ", val/1e3);
634 else
635 fprintf(fp, "%ums ", val);
636 }
637 break;
638 case RTAX_CC_ALGO:
639 print_string(PRINT_ANY, "congestion",
640 "%s ", rta_getattr_str(mxrta[i]));
641 break;
642 }
643 }
644
645 close_json_object();
646 close_json_array(PRINT_JSON, NULL);
647 }
648
649 static void print_rta_multipath(FILE *fp, const struct rtmsg *r,
650 struct rtattr *rta)
651 {
652 const struct rtnexthop *nh = RTA_DATA(rta);
653 int len = RTA_PAYLOAD(rta);
654 int first = 1;
655
656 open_json_array(PRINT_JSON, "nexthops");
657
658 while (len >= sizeof(*nh)) {
659 struct rtattr *tb[RTA_MAX + 1];
660
661 if (nh->rtnh_len > len)
662 break;
663
664 open_json_object(NULL);
665
666 if ((r->rtm_flags & RTM_F_CLONED) &&
667 r->rtm_type == RTN_MULTICAST) {
668 if (first) {
669 print_string(PRINT_FP, NULL, "Oifs: ", NULL);
670 first = 0;
671 } else {
672 print_string(PRINT_FP, NULL, " ", NULL);
673 }
674 } else
675 print_string(PRINT_FP, NULL, "%s\tnexthop ", _SL_);
676
677 if (nh->rtnh_len > sizeof(*nh)) {
678 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh),
679 nh->rtnh_len - sizeof(*nh));
680
681 if (tb[RTA_ENCAP])
682 lwt_print_encap(fp,
683 tb[RTA_ENCAP_TYPE],
684 tb[RTA_ENCAP]);
685 if (tb[RTA_NEWDST])
686 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
687 if (tb[RTA_GATEWAY])
688 print_rta_gateway(fp, r->rtm_family,
689 tb[RTA_GATEWAY]);
690 if (tb[RTA_VIA])
691 print_rta_via(fp, tb[RTA_VIA]);
692 if (tb[RTA_FLOW])
693 print_rta_flow(fp, tb[RTA_FLOW]);
694 }
695
696 if ((r->rtm_flags & RTM_F_CLONED) &&
697 r->rtm_type == RTN_MULTICAST) {
698 print_string(PRINT_ANY, "dev",
699 "%s", ll_index_to_name(nh->rtnh_ifindex));
700
701 if (nh->rtnh_hops != 1)
702 print_int(PRINT_ANY, "ttl", "(ttl>%d)", nh->rtnh_hops);
703
704 print_string(PRINT_FP, NULL, " ", NULL);
705 } else {
706 print_string(PRINT_ANY, "dev",
707 "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
708
709 if (r->rtm_family != AF_MPLS)
710 print_int(PRINT_ANY, "weight",
711 "weight %d ", nh->rtnh_hops + 1);
712 }
713
714 print_rt_flags(fp, nh->rtnh_flags);
715
716 len -= NLMSG_ALIGN(nh->rtnh_len);
717 nh = RTNH_NEXT(nh);
718
719 close_json_object();
720 }
721 close_json_array(PRINT_JSON, NULL);
722 }
723
724 int print_route(struct nlmsghdr *n, void *arg)
725 {
726 FILE *fp = (FILE *)arg;
727 struct rtmsg *r = NLMSG_DATA(n);
728 int len = n->nlmsg_len;
729 struct rtattr *tb[RTA_MAX+1];
730 int family, color, host_len;
731 __u32 table;
732 int ret;
733
734 SPRINT_BUF(b1);
735
736 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
737 fprintf(stderr, "Not a route: %08x %08x %08x\n",
738 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
739 return -1;
740 }
741 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
742 return 0;
743 len -= NLMSG_LENGTH(sizeof(*r));
744 if (len < 0) {
745 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
746 return -1;
747 }
748
749 host_len = af_bit_len(r->rtm_family);
750
751 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
752 table = rtm_get_table(r, tb);
753
754 if (!filter_nlmsg(n, tb, host_len))
755 return 0;
756
757 if (filter.flushb) {
758 struct nlmsghdr *fn;
759
760 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
761 ret = flush_update();
762 if (ret < 0)
763 return ret;
764 }
765 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
766 memcpy(fn, n, n->nlmsg_len);
767 fn->nlmsg_type = RTM_DELROUTE;
768 fn->nlmsg_flags = NLM_F_REQUEST;
769 fn->nlmsg_seq = ++rth.seq;
770 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
771 filter.flushed++;
772 if (show_stats < 2)
773 return 0;
774 }
775
776 open_json_object(NULL);
777 if (n->nlmsg_type == RTM_DELROUTE)
778 print_bool(PRINT_ANY, "deleted", "Deleted ", true);
779
780 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
781 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
782 print_string(PRINT_ANY, "type", "%s ",
783 rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
784
785 color = COLOR_NONE;
786 if (tb[RTA_DST]) {
787 family = get_real_family(r->rtm_type, r->rtm_family);
788 color = ifa_family_color(family);
789
790 if (r->rtm_dst_len != host_len) {
791 snprintf(b1, sizeof(b1),
792 "%s/%u", rt_addr_n2a_rta(family, tb[RTA_DST]),
793 r->rtm_dst_len);
794 } else {
795 format_host_rta_r(family, tb[RTA_DST],
796 b1, sizeof(b1));
797
798 }
799 } else if (r->rtm_dst_len) {
800 snprintf(b1, sizeof(b1), "0/%d ", r->rtm_dst_len);
801 } else {
802 strncpy(b1, "default", sizeof(b1));
803 }
804 print_color_string(PRINT_ANY, color,
805 "dst", "%s ", b1);
806
807 if (tb[RTA_SRC]) {
808 family = get_real_family(r->rtm_type, r->rtm_family);
809 color = ifa_family_color(family);
810
811 if (r->rtm_src_len != host_len) {
812 snprintf(b1, sizeof(b1),
813 "%s/%u",
814 rt_addr_n2a_rta(family, tb[RTA_SRC]),
815 r->rtm_src_len);
816 } else {
817 format_host_rta_r(family, tb[RTA_SRC],
818 b1, sizeof(b1));
819 }
820 print_color_string(PRINT_ANY, color,
821 "from", "from %s ", b1);
822 } else if (r->rtm_src_len) {
823 snprintf(b1, sizeof(b1), "0/%u", r->rtm_src_len);
824
825 print_string(PRINT_ANY, "src", "from %s ", b1);
826 }
827
828 if (tb[RTA_NH_ID])
829 print_uint(PRINT_ANY, "nhid", "nhid %u ",
830 rta_getattr_u32(tb[RTA_NH_ID]));
831
832 if (tb[RTA_NEWDST])
833 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
834
835 if (tb[RTA_ENCAP])
836 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
837
838 if (r->rtm_tos && filter.tosmask != -1) {
839 print_string(PRINT_ANY, "tos", "tos %s ",
840 rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
841 }
842
843 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len)
844 print_rta_gateway(fp, r->rtm_family, tb[RTA_GATEWAY]);
845
846 if (tb[RTA_VIA])
847 print_rta_via(fp, tb[RTA_VIA]);
848
849 if (tb[RTA_OIF] && filter.oifmask != -1)
850 print_rta_if(fp, tb[RTA_OIF], "dev");
851
852 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
853 print_string(PRINT_ANY,
854 "table", "table %s ",
855 rtnl_rttable_n2a(table, b1, sizeof(b1)));
856
857 if (!(r->rtm_flags & RTM_F_CLONED)) {
858 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) &&
859 filter.protocolmask != -1)
860 print_string(PRINT_ANY,
861 "protocol", "proto %s ",
862 rtnl_rtprot_n2a(r->rtm_protocol,
863 b1, sizeof(b1)));
864
865 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) &&
866 filter.scopemask != -1)
867 print_string(PRINT_ANY,
868 "scope", "scope %s ",
869 rtnl_rtscope_n2a(r->rtm_scope,
870 b1, sizeof(b1)));
871 }
872
873 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
874 const char *psrc
875 = rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]);
876
877 /* Do not use format_host(). It is our local addr
878 and symbolic name will not be useful.
879 */
880 if (is_json_context())
881 print_string(PRINT_JSON, "prefsrc", NULL, psrc);
882 else {
883 fprintf(fp, "src ");
884 print_color_string(PRINT_FP,
885 ifa_family_color(r->rtm_family),
886 NULL, "%s ", psrc);
887 }
888
889 }
890
891 if (tb[RTA_PRIORITY] && filter.metricmask != -1)
892 print_uint(PRINT_ANY, "metric", "metric %u ",
893 rta_getattr_u32(tb[RTA_PRIORITY]));
894
895 print_rt_flags(fp, r->rtm_flags);
896
897 if (tb[RTA_MARK]) {
898 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
899
900 if (mark) {
901 if (is_json_context())
902 print_uint(PRINT_JSON, "mark", NULL, mark);
903 else if (mark >= 16)
904 print_0xhex(PRINT_FP, NULL,
905 "mark 0x%llx ", mark);
906 else
907 print_uint(PRINT_FP, NULL,
908 "mark %u ", mark);
909 }
910 }
911
912 if (tb[RTA_FLOW] && filter.realmmask != ~0U)
913 print_rta_flow(fp, tb[RTA_FLOW]);
914
915 if (tb[RTA_UID])
916 print_uint(PRINT_ANY, "uid", "uid %u ",
917 rta_getattr_u32(tb[RTA_UID]));
918
919 if (r->rtm_family == AF_INET) {
920 if (r->rtm_flags & RTM_F_CLONED)
921 print_cache_flags(fp, r->rtm_flags);
922
923 if (tb[RTA_CACHEINFO])
924 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
925 } else if (r->rtm_family == AF_INET6) {
926 if (tb[RTA_CACHEINFO])
927 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
928 }
929
930 if (tb[RTA_METRICS])
931 print_rta_metrics(fp, tb[RTA_METRICS]);
932
933 if (tb[RTA_IIF] && filter.iifmask != -1)
934 print_rta_if(fp, tb[RTA_IIF], "iif");
935
936 if (tb[RTA_MULTIPATH])
937 print_rta_multipath(fp, r, tb[RTA_MULTIPATH]);
938
939 if (tb[RTA_PREF])
940 print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));
941
942 if (tb[RTA_TTL_PROPAGATE]) {
943 bool propagate = rta_getattr_u8(tb[RTA_TTL_PROPAGATE]);
944
945 if (is_json_context())
946 print_bool(PRINT_JSON, "ttl-propogate", NULL,
947 propagate);
948 else
949 print_string(PRINT_FP, NULL,
950 "ttl-propogate %s",
951 propagate ? "enabled" : "disabled");
952 }
953
954 print_string(PRINT_FP, NULL, "\n", NULL);
955 close_json_object();
956 fflush(fp);
957 return 0;
958 }
959
960 static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
961 struct rtattr *rta, size_t len, struct rtnexthop *rtnh,
962 int *argcp, char ***argvp)
963 {
964 int argc = *argcp;
965 char **argv = *argvp;
966
967 while (++argv, --argc > 0) {
968 if (strcmp(*argv, "via") == 0) {
969 inet_prefix addr;
970 int family;
971
972 NEXT_ARG();
973 family = read_family(*argv);
974 if (family == AF_UNSPEC)
975 family = r->rtm_family;
976 else
977 NEXT_ARG();
978 get_addr(&addr, *argv, family);
979 if (r->rtm_family == AF_UNSPEC)
980 r->rtm_family = addr.family;
981 if (addr.family == r->rtm_family) {
982 if (rta_addattr_l(rta, len, RTA_GATEWAY,
983 &addr.data, addr.bytelen))
984 return -1;
985 rtnh->rtnh_len += sizeof(struct rtattr)
986 + addr.bytelen;
987 } else {
988 if (rta_addattr_l(rta, len, RTA_VIA,
989 &addr.family, addr.bytelen + 2))
990 return -1;
991 rtnh->rtnh_len += RTA_SPACE(addr.bytelen + 2);
992 }
993 } else if (strcmp(*argv, "dev") == 0) {
994 NEXT_ARG();
995 rtnh->rtnh_ifindex = ll_name_to_index(*argv);
996 if (!rtnh->rtnh_ifindex)
997 return nodev(*argv);
998 } else if (strcmp(*argv, "weight") == 0) {
999 unsigned int w;
1000
1001 NEXT_ARG();
1002 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
1003 invarg("\"weight\" is invalid\n", *argv);
1004 rtnh->rtnh_hops = w - 1;
1005 } else if (strcmp(*argv, "onlink") == 0) {
1006 rtnh->rtnh_flags |= RTNH_F_ONLINK;
1007 } else if (matches(*argv, "realms") == 0) {
1008 __u32 realm;
1009
1010 NEXT_ARG();
1011 if (get_rt_realms_or_raw(&realm, *argv))
1012 invarg("\"realm\" value is invalid\n", *argv);
1013 if (rta_addattr32(rta, len, RTA_FLOW, realm))
1014 return -1;
1015 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
1016 } else if (strcmp(*argv, "encap") == 0) {
1017 int old_len = rta->rta_len;
1018
1019 if (lwt_parse_encap(rta, len, &argc, &argv,
1020 RTA_ENCAP, RTA_ENCAP_TYPE))
1021 return -1;
1022 rtnh->rtnh_len += rta->rta_len - old_len;
1023 } else if (strcmp(*argv, "as") == 0) {
1024 inet_prefix addr;
1025
1026 NEXT_ARG();
1027 if (strcmp(*argv, "to") == 0)
1028 NEXT_ARG();
1029 get_addr(&addr, *argv, r->rtm_family);
1030 if (rta_addattr_l(rta, len, RTA_NEWDST,
1031 &addr.data, addr.bytelen))
1032 return -1;
1033 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
1034 } else
1035 break;
1036 }
1037 *argcp = argc;
1038 *argvp = argv;
1039 return 0;
1040 }
1041
1042 static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
1043 int argc, char **argv)
1044 {
1045 char buf[4096];
1046 struct rtattr *rta = (void *)buf;
1047 struct rtnexthop *rtnh;
1048
1049 rta->rta_type = RTA_MULTIPATH;
1050 rta->rta_len = RTA_LENGTH(0);
1051 rtnh = RTA_DATA(rta);
1052
1053 while (argc > 0) {
1054 if (strcmp(*argv, "nexthop") != 0) {
1055 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
1056 exit(-1);
1057 }
1058 if (argc <= 1) {
1059 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
1060 exit(-1);
1061 }
1062 memset(rtnh, 0, sizeof(*rtnh));
1063 rtnh->rtnh_len = sizeof(*rtnh);
1064 rta->rta_len += rtnh->rtnh_len;
1065 if (parse_one_nh(n, r, rta, 4096, rtnh, &argc, &argv)) {
1066 fprintf(stderr, "Error: cannot parse nexthop\n");
1067 exit(-1);
1068 }
1069 rtnh = RTNH_NEXT(rtnh);
1070 }
1071
1072 if (rta->rta_len > RTA_LENGTH(0))
1073 return addattr_l(n, 4096, RTA_MULTIPATH,
1074 RTA_DATA(rta), RTA_PAYLOAD(rta));
1075 return 0;
1076 }
1077
1078 static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
1079 {
1080 struct {
1081 struct nlmsghdr n;
1082 struct rtmsg r;
1083 char buf[4096];
1084 } req = {
1085 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1086 .n.nlmsg_flags = NLM_F_REQUEST | flags,
1087 .n.nlmsg_type = cmd,
1088 .r.rtm_family = preferred_family,
1089 .r.rtm_table = RT_TABLE_MAIN,
1090 .r.rtm_scope = RT_SCOPE_NOWHERE,
1091 };
1092 char mxbuf[256];
1093 struct rtattr *mxrta = (void *)mxbuf;
1094 unsigned int mxlock = 0;
1095 char *d = NULL;
1096 int gw_ok = 0;
1097 int dst_ok = 0;
1098 int nhs_ok = 0;
1099 int scope_ok = 0;
1100 int table_ok = 0;
1101 int raw = 0;
1102 int type_ok = 0;
1103 __u32 nhid = 0;
1104
1105 if (cmd != RTM_DELROUTE) {
1106 req.r.rtm_protocol = RTPROT_BOOT;
1107 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1108 req.r.rtm_type = RTN_UNICAST;
1109 }
1110
1111 mxrta->rta_type = RTA_METRICS;
1112 mxrta->rta_len = RTA_LENGTH(0);
1113
1114 while (argc > 0) {
1115 if (strcmp(*argv, "src") == 0) {
1116 inet_prefix addr;
1117
1118 NEXT_ARG();
1119 get_addr(&addr, *argv, req.r.rtm_family);
1120 if (req.r.rtm_family == AF_UNSPEC)
1121 req.r.rtm_family = addr.family;
1122 addattr_l(&req.n, sizeof(req),
1123 RTA_PREFSRC, &addr.data, addr.bytelen);
1124 } else if (strcmp(*argv, "as") == 0) {
1125 inet_prefix addr;
1126
1127 NEXT_ARG();
1128 if (strcmp(*argv, "to") == 0) {
1129 NEXT_ARG();
1130 }
1131 get_addr(&addr, *argv, req.r.rtm_family);
1132 if (req.r.rtm_family == AF_UNSPEC)
1133 req.r.rtm_family = addr.family;
1134 addattr_l(&req.n, sizeof(req),
1135 RTA_NEWDST, &addr.data, addr.bytelen);
1136 } else if (strcmp(*argv, "via") == 0) {
1137 inet_prefix addr;
1138 int family;
1139
1140 if (gw_ok) {
1141 invarg("use nexthop syntax to specify multiple via\n",
1142 *argv);
1143 }
1144 gw_ok = 1;
1145 NEXT_ARG();
1146 family = read_family(*argv);
1147 if (family == AF_UNSPEC)
1148 family = req.r.rtm_family;
1149 else
1150 NEXT_ARG();
1151 get_addr(&addr, *argv, family);
1152 if (req.r.rtm_family == AF_UNSPEC)
1153 req.r.rtm_family = addr.family;
1154 if (addr.family == req.r.rtm_family)
1155 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
1156 &addr.data, addr.bytelen);
1157 else
1158 addattr_l(&req.n, sizeof(req), RTA_VIA,
1159 &addr.family, addr.bytelen+2);
1160 } else if (strcmp(*argv, "from") == 0) {
1161 inet_prefix addr;
1162
1163 NEXT_ARG();
1164 get_prefix(&addr, *argv, req.r.rtm_family);
1165 if (req.r.rtm_family == AF_UNSPEC)
1166 req.r.rtm_family = addr.family;
1167 if (addr.bytelen)
1168 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1169 req.r.rtm_src_len = addr.bitlen;
1170 } else if (strcmp(*argv, "tos") == 0 ||
1171 matches(*argv, "dsfield") == 0) {
1172 __u32 tos;
1173
1174 NEXT_ARG();
1175 if (rtnl_dsfield_a2n(&tos, *argv))
1176 invarg("\"tos\" value is invalid\n", *argv);
1177 req.r.rtm_tos = tos;
1178 } else if (strcmp(*argv, "expires") == 0) {
1179 __u32 expires;
1180
1181 NEXT_ARG();
1182 if (get_u32(&expires, *argv, 0))
1183 invarg("\"expires\" value is invalid\n", *argv);
1184 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
1185 } else if (matches(*argv, "metric") == 0 ||
1186 matches(*argv, "priority") == 0 ||
1187 strcmp(*argv, "preference") == 0) {
1188 __u32 metric;
1189
1190 NEXT_ARG();
1191 if (get_u32(&metric, *argv, 0))
1192 invarg("\"metric\" value is invalid\n", *argv);
1193 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
1194 } else if (strcmp(*argv, "scope") == 0) {
1195 __u32 scope = 0;
1196
1197 NEXT_ARG();
1198 if (rtnl_rtscope_a2n(&scope, *argv))
1199 invarg("invalid \"scope\" value\n", *argv);
1200 req.r.rtm_scope = scope;
1201 scope_ok = 1;
1202 } else if (strcmp(*argv, "mtu") == 0) {
1203 unsigned int mtu;
1204
1205 NEXT_ARG();
1206 if (strcmp(*argv, "lock") == 0) {
1207 mxlock |= (1<<RTAX_MTU);
1208 NEXT_ARG();
1209 }
1210 if (get_unsigned(&mtu, *argv, 0))
1211 invarg("\"mtu\" value is invalid\n", *argv);
1212 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
1213 } else if (strcmp(*argv, "hoplimit") == 0) {
1214 unsigned int hoplimit;
1215
1216 NEXT_ARG();
1217 if (strcmp(*argv, "lock") == 0) {
1218 mxlock |= (1<<RTAX_HOPLIMIT);
1219 NEXT_ARG();
1220 }
1221 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
1222 invarg("\"hoplimit\" value is invalid\n", *argv);
1223 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
1224 } else if (strcmp(*argv, "advmss") == 0) {
1225 unsigned int mss;
1226
1227 NEXT_ARG();
1228 if (strcmp(*argv, "lock") == 0) {
1229 mxlock |= (1<<RTAX_ADVMSS);
1230 NEXT_ARG();
1231 }
1232 if (get_unsigned(&mss, *argv, 0))
1233 invarg("\"mss\" value is invalid\n", *argv);
1234 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
1235 } else if (matches(*argv, "reordering") == 0) {
1236 unsigned int reord;
1237
1238 NEXT_ARG();
1239 if (strcmp(*argv, "lock") == 0) {
1240 mxlock |= (1<<RTAX_REORDERING);
1241 NEXT_ARG();
1242 }
1243 if (get_unsigned(&reord, *argv, 0))
1244 invarg("\"reordering\" value is invalid\n", *argv);
1245 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1246 } else if (strcmp(*argv, "rtt") == 0) {
1247 unsigned int rtt;
1248
1249 NEXT_ARG();
1250 if (strcmp(*argv, "lock") == 0) {
1251 mxlock |= (1<<RTAX_RTT);
1252 NEXT_ARG();
1253 }
1254 if (get_time_rtt(&rtt, *argv, &raw))
1255 invarg("\"rtt\" value is invalid\n", *argv);
1256 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1257 (raw) ? rtt : rtt * 8);
1258 } else if (strcmp(*argv, "rto_min") == 0) {
1259 unsigned int rto_min;
1260
1261 NEXT_ARG();
1262 mxlock |= (1<<RTAX_RTO_MIN);
1263 if (get_time_rtt(&rto_min, *argv, &raw))
1264 invarg("\"rto_min\" value is invalid\n",
1265 *argv);
1266 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1267 rto_min);
1268 } else if (matches(*argv, "window") == 0) {
1269 unsigned int win;
1270
1271 NEXT_ARG();
1272 if (strcmp(*argv, "lock") == 0) {
1273 mxlock |= (1<<RTAX_WINDOW);
1274 NEXT_ARG();
1275 }
1276 if (get_unsigned(&win, *argv, 0))
1277 invarg("\"window\" value is invalid\n", *argv);
1278 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1279 } else if (matches(*argv, "cwnd") == 0) {
1280 unsigned int win;
1281
1282 NEXT_ARG();
1283 if (strcmp(*argv, "lock") == 0) {
1284 mxlock |= (1<<RTAX_CWND);
1285 NEXT_ARG();
1286 }
1287 if (get_unsigned(&win, *argv, 0))
1288 invarg("\"cwnd\" value is invalid\n", *argv);
1289 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1290 } else if (matches(*argv, "initcwnd") == 0) {
1291 unsigned int win;
1292
1293 NEXT_ARG();
1294 if (strcmp(*argv, "lock") == 0) {
1295 mxlock |= (1<<RTAX_INITCWND);
1296 NEXT_ARG();
1297 }
1298 if (get_unsigned(&win, *argv, 0))
1299 invarg("\"initcwnd\" value is invalid\n", *argv);
1300 rta_addattr32(mxrta, sizeof(mxbuf),
1301 RTAX_INITCWND, win);
1302 } else if (matches(*argv, "initrwnd") == 0) {
1303 unsigned int win;
1304
1305 NEXT_ARG();
1306 if (strcmp(*argv, "lock") == 0) {
1307 mxlock |= (1<<RTAX_INITRWND);
1308 NEXT_ARG();
1309 }
1310 if (get_unsigned(&win, *argv, 0))
1311 invarg("\"initrwnd\" value is invalid\n", *argv);
1312 rta_addattr32(mxrta, sizeof(mxbuf),
1313 RTAX_INITRWND, win);
1314 } else if (matches(*argv, "features") == 0) {
1315 unsigned int features = 0;
1316
1317 while (argc > 0) {
1318 NEXT_ARG();
1319
1320 if (strcmp(*argv, "ecn") == 0)
1321 features |= RTAX_FEATURE_ECN;
1322 else
1323 invarg("\"features\" value not valid\n", *argv);
1324 break;
1325 }
1326
1327 rta_addattr32(mxrta, sizeof(mxbuf),
1328 RTAX_FEATURES, features);
1329 } else if (matches(*argv, "quickack") == 0) {
1330 unsigned int quickack;
1331
1332 NEXT_ARG();
1333 if (get_unsigned(&quickack, *argv, 0))
1334 invarg("\"quickack\" value is invalid\n", *argv);
1335 if (quickack != 1 && quickack != 0)
1336 invarg("\"quickack\" value should be 0 or 1\n", *argv);
1337 rta_addattr32(mxrta, sizeof(mxbuf),
1338 RTAX_QUICKACK, quickack);
1339 } else if (matches(*argv, "congctl") == 0) {
1340 NEXT_ARG();
1341 if (strcmp(*argv, "lock") == 0) {
1342 mxlock |= 1 << RTAX_CC_ALGO;
1343 NEXT_ARG();
1344 }
1345 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1346 strlen(*argv));
1347 } else if (matches(*argv, "rttvar") == 0) {
1348 unsigned int win;
1349
1350 NEXT_ARG();
1351 if (strcmp(*argv, "lock") == 0) {
1352 mxlock |= (1<<RTAX_RTTVAR);
1353 NEXT_ARG();
1354 }
1355 if (get_time_rtt(&win, *argv, &raw))
1356 invarg("\"rttvar\" value is invalid\n", *argv);
1357 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1358 (raw) ? win : win * 4);
1359 } else if (matches(*argv, "ssthresh") == 0) {
1360 unsigned int win;
1361
1362 NEXT_ARG();
1363 if (strcmp(*argv, "lock") == 0) {
1364 mxlock |= (1<<RTAX_SSTHRESH);
1365 NEXT_ARG();
1366 }
1367 if (get_unsigned(&win, *argv, 0))
1368 invarg("\"ssthresh\" value is invalid\n", *argv);
1369 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1370 } else if (matches(*argv, "realms") == 0) {
1371 __u32 realm;
1372
1373 NEXT_ARG();
1374 if (get_rt_realms_or_raw(&realm, *argv))
1375 invarg("\"realm\" value is invalid\n", *argv);
1376 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1377 } else if (strcmp(*argv, "onlink") == 0) {
1378 req.r.rtm_flags |= RTNH_F_ONLINK;
1379 } else if (strcmp(*argv, "nexthop") == 0) {
1380 nhs_ok = 1;
1381 break;
1382 } else if (!strcmp(*argv, "nhid")) {
1383 NEXT_ARG();
1384 if (get_u32(&nhid, *argv, 0))
1385 invarg("\"id\" value is invalid\n", *argv);
1386 addattr32(&req.n, sizeof(req), RTA_NH_ID, nhid);
1387 } else if (matches(*argv, "protocol") == 0) {
1388 __u32 prot;
1389
1390 NEXT_ARG();
1391 if (rtnl_rtprot_a2n(&prot, *argv))
1392 invarg("\"protocol\" value is invalid\n", *argv);
1393 req.r.rtm_protocol = prot;
1394 } else if (matches(*argv, "table") == 0) {
1395 __u32 tid;
1396
1397 NEXT_ARG();
1398 if (rtnl_rttable_a2n(&tid, *argv))
1399 invarg("\"table\" value is invalid\n", *argv);
1400 if (tid < 256)
1401 req.r.rtm_table = tid;
1402 else {
1403 req.r.rtm_table = RT_TABLE_UNSPEC;
1404 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1405 }
1406 table_ok = 1;
1407 } else if (matches(*argv, "vrf") == 0) {
1408 __u32 tid;
1409
1410 NEXT_ARG();
1411 tid = ipvrf_get_table(*argv);
1412 if (tid == 0)
1413 invarg("Invalid VRF\n", *argv);
1414 if (tid < 256)
1415 req.r.rtm_table = tid;
1416 else {
1417 req.r.rtm_table = RT_TABLE_UNSPEC;
1418 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1419 }
1420 table_ok = 1;
1421 } else if (strcmp(*argv, "dev") == 0 ||
1422 strcmp(*argv, "oif") == 0) {
1423 NEXT_ARG();
1424 d = *argv;
1425 } else if (matches(*argv, "pref") == 0) {
1426 __u8 pref;
1427
1428 NEXT_ARG();
1429 if (strcmp(*argv, "low") == 0)
1430 pref = ICMPV6_ROUTER_PREF_LOW;
1431 else if (strcmp(*argv, "medium") == 0)
1432 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1433 else if (strcmp(*argv, "high") == 0)
1434 pref = ICMPV6_ROUTER_PREF_HIGH;
1435 else if (get_u8(&pref, *argv, 0))
1436 invarg("\"pref\" value is invalid\n", *argv);
1437 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1438 } else if (strcmp(*argv, "encap") == 0) {
1439 char buf[1024];
1440 struct rtattr *rta = (void *)buf;
1441
1442 rta->rta_type = RTA_ENCAP;
1443 rta->rta_len = RTA_LENGTH(0);
1444
1445 lwt_parse_encap(rta, sizeof(buf), &argc, &argv,
1446 RTA_ENCAP, RTA_ENCAP_TYPE);
1447
1448 if (rta->rta_len > RTA_LENGTH(0))
1449 addraw_l(&req.n, 1024
1450 , RTA_DATA(rta), RTA_PAYLOAD(rta));
1451 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1452 __u8 ttl_prop;
1453
1454 NEXT_ARG();
1455 if (matches(*argv, "enabled") == 0)
1456 ttl_prop = 1;
1457 else if (matches(*argv, "disabled") == 0)
1458 ttl_prop = 0;
1459 else
1460 invarg("\"ttl-propagate\" value is invalid\n",
1461 *argv);
1462
1463 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1464 ttl_prop);
1465 } else if (matches(*argv, "fastopen_no_cookie") == 0) {
1466 unsigned int fastopen_no_cookie;
1467
1468 NEXT_ARG();
1469 if (get_unsigned(&fastopen_no_cookie, *argv, 0))
1470 invarg("\"fastopen_no_cookie\" value is invalid\n", *argv);
1471 if (fastopen_no_cookie != 1 && fastopen_no_cookie != 0)
1472 invarg("\"fastopen_no_cookie\" value should be 0 or 1\n", *argv);
1473 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FASTOPEN_NO_COOKIE, fastopen_no_cookie);
1474 } else {
1475 int type;
1476 inet_prefix dst;
1477
1478 if (strcmp(*argv, "to") == 0) {
1479 NEXT_ARG();
1480 }
1481 if ((**argv < '0' || **argv > '9') &&
1482 rtnl_rtntype_a2n(&type, *argv) == 0) {
1483 NEXT_ARG();
1484 req.r.rtm_type = type;
1485 type_ok = 1;
1486 }
1487
1488 if (matches(*argv, "help") == 0)
1489 usage();
1490 if (dst_ok)
1491 duparg2("to", *argv);
1492 get_prefix(&dst, *argv, req.r.rtm_family);
1493 if (req.r.rtm_family == AF_UNSPEC)
1494 req.r.rtm_family = dst.family;
1495 req.r.rtm_dst_len = dst.bitlen;
1496 dst_ok = 1;
1497 if (dst.bytelen)
1498 addattr_l(&req.n, sizeof(req),
1499 RTA_DST, &dst.data, dst.bytelen);
1500 }
1501 argc--; argv++;
1502 }
1503
1504 if (!dst_ok)
1505 usage();
1506
1507 if (d) {
1508 int idx = ll_name_to_index(d);
1509
1510 if (!idx)
1511 return nodev(d);
1512 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1513 }
1514
1515 if (mxrta->rta_len > RTA_LENGTH(0)) {
1516 if (mxlock)
1517 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1518 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1519 }
1520
1521 if (nhs_ok && parse_nexthops(&req.n, &req.r, argc, argv))
1522 return -1;
1523
1524 if (req.r.rtm_family == AF_UNSPEC)
1525 req.r.rtm_family = AF_INET;
1526
1527 if (!table_ok) {
1528 if (req.r.rtm_type == RTN_LOCAL ||
1529 req.r.rtm_type == RTN_BROADCAST ||
1530 req.r.rtm_type == RTN_NAT ||
1531 req.r.rtm_type == RTN_ANYCAST)
1532 req.r.rtm_table = RT_TABLE_LOCAL;
1533 }
1534 if (!scope_ok) {
1535 if (req.r.rtm_family == AF_INET6 ||
1536 req.r.rtm_family == AF_MPLS)
1537 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1538 else if (req.r.rtm_type == RTN_LOCAL ||
1539 req.r.rtm_type == RTN_NAT)
1540 req.r.rtm_scope = RT_SCOPE_HOST;
1541 else if (req.r.rtm_type == RTN_BROADCAST ||
1542 req.r.rtm_type == RTN_MULTICAST ||
1543 req.r.rtm_type == RTN_ANYCAST)
1544 req.r.rtm_scope = RT_SCOPE_LINK;
1545 else if (req.r.rtm_type == RTN_UNICAST ||
1546 req.r.rtm_type == RTN_UNSPEC) {
1547 if (cmd == RTM_DELROUTE)
1548 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1549 else if (!gw_ok && !nhs_ok && !nhid)
1550 req.r.rtm_scope = RT_SCOPE_LINK;
1551 }
1552 }
1553
1554 if (!type_ok && req.r.rtm_family == AF_MPLS)
1555 req.r.rtm_type = RTN_UNICAST;
1556
1557 if (rtnl_talk(&rth, &req.n, NULL) < 0)
1558 return -2;
1559
1560 return 0;
1561 }
1562
1563 static int iproute_flush_cache(void)
1564 {
1565 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1566
1567 int len;
1568 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1569 char *buffer = "-1";
1570
1571 if (flush_fd < 0) {
1572 fprintf(stderr, "Cannot open \"%s\": %s\n",
1573 ROUTE_FLUSH_PATH, strerror(errno));
1574 return -1;
1575 }
1576
1577 len = strlen(buffer);
1578
1579 if ((write(flush_fd, (void *)buffer, len)) < len) {
1580 fprintf(stderr, "Cannot flush routing cache\n");
1581 close(flush_fd);
1582 return -1;
1583 }
1584 close(flush_fd);
1585 return 0;
1586 }
1587
1588 static __u32 route_dump_magic = 0x45311224;
1589
1590 static int save_route(struct nlmsghdr *n, void *arg)
1591 {
1592 int ret;
1593 int len = n->nlmsg_len;
1594 struct rtmsg *r = NLMSG_DATA(n);
1595 struct rtattr *tb[RTA_MAX+1];
1596 int host_len;
1597
1598 host_len = af_bit_len(r->rtm_family);
1599 len -= NLMSG_LENGTH(sizeof(*r));
1600 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1601
1602 if (!filter_nlmsg(n, tb, host_len))
1603 return 0;
1604
1605 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1606 if ((ret > 0) && (ret != n->nlmsg_len)) {
1607 fprintf(stderr, "Short write while saving nlmsg\n");
1608 ret = -EIO;
1609 }
1610
1611 return ret == n->nlmsg_len ? 0 : ret;
1612 }
1613
1614 static int save_route_prep(void)
1615 {
1616 int ret;
1617
1618 if (isatty(STDOUT_FILENO)) {
1619 fprintf(stderr, "Not sending a binary stream to stdout\n");
1620 return -1;
1621 }
1622
1623 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1624 if (ret != sizeof(route_dump_magic)) {
1625 fprintf(stderr, "Can't write magic to dump file\n");
1626 return -1;
1627 }
1628
1629 return 0;
1630 }
1631
1632 static int iproute_dump_filter(struct nlmsghdr *nlh, int reqlen)
1633 {
1634 struct rtmsg *rtm = NLMSG_DATA(nlh);
1635 int err;
1636
1637 rtm->rtm_protocol = filter.protocol;
1638 if (filter.cloned)
1639 rtm->rtm_flags |= RTM_F_CLONED;
1640
1641 if (filter.tb) {
1642 err = addattr32(nlh, reqlen, RTA_TABLE, filter.tb);
1643 if (err)
1644 return err;
1645 }
1646
1647 if (filter.oif) {
1648 err = addattr32(nlh, reqlen, RTA_OIF, filter.oif);
1649 if (err)
1650 return err;
1651 }
1652
1653 return 0;
1654 }
1655
1656 static int iproute_flush(int family, rtnl_filter_t filter_fn)
1657 {
1658 time_t start = time(0);
1659 char flushb[4096-512];
1660 int round = 0;
1661 int ret;
1662
1663 if (filter.cloned) {
1664 if (family != AF_INET6) {
1665 iproute_flush_cache();
1666 if (show_stats)
1667 printf("*** IPv4 routing cache is flushed.\n");
1668 }
1669 if (family == AF_INET)
1670 return 0;
1671 }
1672
1673 filter.flushb = flushb;
1674 filter.flushp = 0;
1675 filter.flushe = sizeof(flushb);
1676
1677 for (;;) {
1678 if (rtnl_routedump_req(&rth, family, iproute_dump_filter) < 0) {
1679 perror("Cannot send dump request");
1680 return -2;
1681 }
1682 filter.flushed = 0;
1683 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1684 fprintf(stderr, "Flush terminated\n");
1685 return -2;
1686 }
1687 if (filter.flushed == 0) {
1688 if (show_stats) {
1689 if (round == 0 &&
1690 (!filter.cloned || family == AF_INET6))
1691 printf("Nothing to flush.\n");
1692 else
1693 printf("*** Flush is complete after %d round%s ***\n",
1694 round, round > 1 ? "s" : "");
1695 }
1696 fflush(stdout);
1697 return 0;
1698 }
1699 round++;
1700 ret = flush_update();
1701 if (ret < 0)
1702 return ret;
1703
1704 if (time(0) - start > 30) {
1705 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1706 (long)(time(0) - start), filter.flushed);
1707 return -1;
1708 }
1709
1710 if (show_stats) {
1711 printf("\n*** Round %d, deleting %d entries ***\n",
1712 round, filter.flushed);
1713 fflush(stdout);
1714 }
1715 }
1716 }
1717
1718 static int iproute_list_flush_or_save(int argc, char **argv, int action)
1719 {
1720 int dump_family = preferred_family;
1721 char *id = NULL;
1722 char *od = NULL;
1723 unsigned int mark = 0;
1724 rtnl_filter_t filter_fn;
1725
1726 if (action == IPROUTE_SAVE) {
1727 if (save_route_prep())
1728 return -1;
1729
1730 filter_fn = save_route;
1731 } else
1732 filter_fn = print_route;
1733
1734 iproute_reset_filter(0);
1735 filter.tb = RT_TABLE_MAIN;
1736
1737 if ((action == IPROUTE_FLUSH) && argc <= 0) {
1738 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1739 return -1;
1740 }
1741
1742 while (argc > 0) {
1743 if (matches(*argv, "table") == 0) {
1744 __u32 tid;
1745
1746 NEXT_ARG();
1747 if (rtnl_rttable_a2n(&tid, *argv)) {
1748 if (strcmp(*argv, "all") == 0) {
1749 filter.tb = 0;
1750 } else if (strcmp(*argv, "cache") == 0) {
1751 filter.cloned = 1;
1752 } else if (strcmp(*argv, "help") == 0) {
1753 usage();
1754 } else {
1755 invarg("table id value is invalid\n", *argv);
1756 }
1757 } else
1758 filter.tb = tid;
1759 } else if (matches(*argv, "vrf") == 0) {
1760 __u32 tid;
1761
1762 NEXT_ARG();
1763 tid = ipvrf_get_table(*argv);
1764 if (tid == 0)
1765 invarg("Invalid VRF\n", *argv);
1766 filter.tb = tid;
1767 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1768 } else if (matches(*argv, "cached") == 0 ||
1769 matches(*argv, "cloned") == 0) {
1770 filter.cloned = 1;
1771 } else if (strcmp(*argv, "tos") == 0 ||
1772 matches(*argv, "dsfield") == 0) {
1773 __u32 tos;
1774
1775 NEXT_ARG();
1776 if (rtnl_dsfield_a2n(&tos, *argv))
1777 invarg("TOS value is invalid\n", *argv);
1778 filter.tos = tos;
1779 filter.tosmask = -1;
1780 } else if (matches(*argv, "protocol") == 0) {
1781 __u32 prot = 0;
1782
1783 NEXT_ARG();
1784 filter.protocolmask = -1;
1785 if (rtnl_rtprot_a2n(&prot, *argv)) {
1786 if (strcmp(*argv, "all") != 0)
1787 invarg("invalid \"protocol\"\n", *argv);
1788 prot = 0;
1789 filter.protocolmask = 0;
1790 }
1791 filter.protocol = prot;
1792 } else if (matches(*argv, "scope") == 0) {
1793 __u32 scope = 0;
1794
1795 NEXT_ARG();
1796 filter.scopemask = -1;
1797 if (rtnl_rtscope_a2n(&scope, *argv)) {
1798 if (strcmp(*argv, "all") != 0)
1799 invarg("invalid \"scope\"\n", *argv);
1800 scope = RT_SCOPE_NOWHERE;
1801 filter.scopemask = 0;
1802 }
1803 filter.scope = scope;
1804 } else if (matches(*argv, "type") == 0) {
1805 int type;
1806
1807 NEXT_ARG();
1808 if (rtnl_rtntype_a2n(&type, *argv))
1809 invarg("node type value is invalid\n", *argv);
1810 filter.typemask = (1<<type);
1811 } else if (strcmp(*argv, "dev") == 0 ||
1812 strcmp(*argv, "oif") == 0) {
1813 NEXT_ARG();
1814 od = *argv;
1815 } else if (strcmp(*argv, "iif") == 0) {
1816 NEXT_ARG();
1817 id = *argv;
1818 } else if (strcmp(*argv, "mark") == 0) {
1819 NEXT_ARG();
1820 if (get_unsigned(&mark, *argv, 0))
1821 invarg("invalid mark value", *argv);
1822 filter.markmask = -1;
1823 } else if (matches(*argv, "metric") == 0 ||
1824 matches(*argv, "priority") == 0 ||
1825 strcmp(*argv, "preference") == 0) {
1826 __u32 metric;
1827
1828 NEXT_ARG();
1829 if (get_u32(&metric, *argv, 0))
1830 invarg("\"metric\" value is invalid\n", *argv);
1831 filter.metric = metric;
1832 filter.metricmask = -1;
1833 } else if (strcmp(*argv, "via") == 0) {
1834 int family;
1835
1836 NEXT_ARG();
1837 family = read_family(*argv);
1838 if (family == AF_UNSPEC)
1839 family = dump_family;
1840 else
1841 NEXT_ARG();
1842 get_prefix(&filter.rvia, *argv, family);
1843 } else if (strcmp(*argv, "src") == 0) {
1844 NEXT_ARG();
1845 get_prefix(&filter.rprefsrc, *argv, dump_family);
1846 } else if (matches(*argv, "realms") == 0) {
1847 __u32 realm;
1848
1849 NEXT_ARG();
1850 if (get_rt_realms_or_raw(&realm, *argv))
1851 invarg("invalid realms\n", *argv);
1852 filter.realm = realm;
1853 filter.realmmask = ~0U;
1854 if ((filter.realm&0xFFFF) == 0 &&
1855 (*argv)[strlen(*argv) - 1] == '/')
1856 filter.realmmask &= ~0xFFFF;
1857 if ((filter.realm&0xFFFF0000U) == 0 &&
1858 (strchr(*argv, '/') == NULL ||
1859 (*argv)[0] == '/'))
1860 filter.realmmask &= ~0xFFFF0000U;
1861 } else if (matches(*argv, "from") == 0) {
1862 NEXT_ARG();
1863 if (matches(*argv, "root") == 0) {
1864 NEXT_ARG();
1865 get_prefix(&filter.rsrc, *argv, dump_family);
1866 } else if (matches(*argv, "match") == 0) {
1867 NEXT_ARG();
1868 get_prefix(&filter.msrc, *argv, dump_family);
1869 } else {
1870 if (matches(*argv, "exact") == 0) {
1871 NEXT_ARG();
1872 }
1873 get_prefix(&filter.msrc, *argv, dump_family);
1874 filter.rsrc = filter.msrc;
1875 }
1876 } else {
1877 if (matches(*argv, "to") == 0) {
1878 NEXT_ARG();
1879 }
1880 if (matches(*argv, "root") == 0) {
1881 NEXT_ARG();
1882 get_prefix(&filter.rdst, *argv, dump_family);
1883 } else if (matches(*argv, "match") == 0) {
1884 NEXT_ARG();
1885 get_prefix(&filter.mdst, *argv, dump_family);
1886 } else {
1887 if (matches(*argv, "exact") == 0) {
1888 NEXT_ARG();
1889 }
1890 get_prefix(&filter.mdst, *argv, dump_family);
1891 filter.rdst = filter.mdst;
1892 }
1893 }
1894 argc--; argv++;
1895 }
1896
1897 if (dump_family == AF_UNSPEC && filter.tb)
1898 dump_family = AF_INET;
1899
1900 if (id || od) {
1901 int idx;
1902
1903 if (id) {
1904 idx = ll_name_to_index(id);
1905 if (!idx)
1906 return nodev(id);
1907 filter.iif = idx;
1908 filter.iifmask = -1;
1909 }
1910 if (od) {
1911 idx = ll_name_to_index(od);
1912 if (!idx)
1913 return nodev(od);
1914 filter.oif = idx;
1915 filter.oifmask = -1;
1916 }
1917 }
1918 filter.mark = mark;
1919
1920 if (action == IPROUTE_FLUSH)
1921 return iproute_flush(dump_family, filter_fn);
1922
1923 if (rtnl_routedump_req(&rth, dump_family, iproute_dump_filter) < 0) {
1924 perror("Cannot send dump request");
1925 return -2;
1926 }
1927
1928 new_json_obj(json);
1929
1930 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1931 fprintf(stderr, "Dump terminated\n");
1932 return -2;
1933 }
1934
1935 delete_json_obj();
1936 fflush(stdout);
1937 return 0;
1938 }
1939
1940
1941 static int iproute_get(int argc, char **argv)
1942 {
1943 struct {
1944 struct nlmsghdr n;
1945 struct rtmsg r;
1946 char buf[1024];
1947 } req = {
1948 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1949 .n.nlmsg_flags = NLM_F_REQUEST,
1950 .n.nlmsg_type = RTM_GETROUTE,
1951 .r.rtm_family = preferred_family,
1952 };
1953 char *idev = NULL;
1954 char *odev = NULL;
1955 struct nlmsghdr *answer;
1956 int connected = 0;
1957 int fib_match = 0;
1958 int from_ok = 0;
1959 unsigned int mark = 0;
1960 bool address_found = false;
1961
1962 iproute_reset_filter(0);
1963 filter.cloned = 2;
1964
1965 while (argc > 0) {
1966 if (strcmp(*argv, "tos") == 0 ||
1967 matches(*argv, "dsfield") == 0) {
1968 __u32 tos;
1969
1970 NEXT_ARG();
1971 if (rtnl_dsfield_a2n(&tos, *argv))
1972 invarg("TOS value is invalid\n", *argv);
1973 req.r.rtm_tos = tos;
1974 } else if (matches(*argv, "from") == 0) {
1975 inet_prefix addr;
1976
1977 NEXT_ARG();
1978 if (matches(*argv, "help") == 0)
1979 usage();
1980 from_ok = 1;
1981 get_prefix(&addr, *argv, req.r.rtm_family);
1982 if (req.r.rtm_family == AF_UNSPEC)
1983 req.r.rtm_family = addr.family;
1984 if (addr.bytelen)
1985 addattr_l(&req.n, sizeof(req), RTA_SRC,
1986 &addr.data, addr.bytelen);
1987 req.r.rtm_src_len = addr.bitlen;
1988 } else if (matches(*argv, "iif") == 0) {
1989 NEXT_ARG();
1990 idev = *argv;
1991 } else if (matches(*argv, "mark") == 0) {
1992 NEXT_ARG();
1993 if (get_unsigned(&mark, *argv, 0))
1994 invarg("invalid mark value", *argv);
1995 } else if (matches(*argv, "oif") == 0 ||
1996 strcmp(*argv, "dev") == 0) {
1997 NEXT_ARG();
1998 odev = *argv;
1999 } else if (matches(*argv, "notify") == 0) {
2000 req.r.rtm_flags |= RTM_F_NOTIFY;
2001 } else if (matches(*argv, "connected") == 0) {
2002 connected = 1;
2003 } else if (matches(*argv, "vrf") == 0) {
2004 NEXT_ARG();
2005 if (!name_is_vrf(*argv))
2006 invarg("Invalid VRF\n", *argv);
2007 odev = *argv;
2008 } else if (matches(*argv, "uid") == 0) {
2009 uid_t uid;
2010
2011 NEXT_ARG();
2012 if (get_unsigned(&uid, *argv, 0))
2013 invarg("invalid UID\n", *argv);
2014 addattr32(&req.n, sizeof(req), RTA_UID, uid);
2015 } else if (matches(*argv, "fibmatch") == 0) {
2016 fib_match = 1;
2017 } else if (strcmp(*argv, "as") == 0) {
2018 inet_prefix addr;
2019
2020 NEXT_ARG();
2021 if (strcmp(*argv, "to") == 0)
2022 NEXT_ARG();
2023 get_addr(&addr, *argv, req.r.rtm_family);
2024 if (req.r.rtm_family == AF_UNSPEC)
2025 req.r.rtm_family = addr.family;
2026 addattr_l(&req.n, sizeof(req), RTA_NEWDST,
2027 &addr.data, addr.bytelen);
2028 } else if (matches(*argv, "sport") == 0) {
2029 __be16 sport;
2030
2031 NEXT_ARG();
2032 if (get_be16(&sport, *argv, 0))
2033 invarg("invalid sport\n", *argv);
2034 addattr16(&req.n, sizeof(req), RTA_SPORT, sport);
2035 } else if (matches(*argv, "dport") == 0) {
2036 __be16 dport;
2037
2038 NEXT_ARG();
2039 if (get_be16(&dport, *argv, 0))
2040 invarg("invalid dport\n", *argv);
2041 addattr16(&req.n, sizeof(req), RTA_DPORT, dport);
2042 } else if (matches(*argv, "ipproto") == 0) {
2043 int ipproto;
2044
2045 NEXT_ARG();
2046 ipproto = inet_proto_a2n(*argv);
2047 if (ipproto < 0)
2048 invarg("Invalid \"ipproto\" value\n",
2049 *argv);
2050 addattr8(&req.n, sizeof(req), RTA_IP_PROTO, ipproto);
2051 } else {
2052 inet_prefix addr;
2053
2054 if (strcmp(*argv, "to") == 0) {
2055 NEXT_ARG();
2056 }
2057 if (matches(*argv, "help") == 0)
2058 usage();
2059 get_prefix(&addr, *argv, req.r.rtm_family);
2060 if (req.r.rtm_family == AF_UNSPEC)
2061 req.r.rtm_family = addr.family;
2062 if (addr.bytelen)
2063 addattr_l(&req.n, sizeof(req),
2064 RTA_DST, &addr.data, addr.bytelen);
2065 req.r.rtm_dst_len = addr.bitlen;
2066 address_found = true;
2067 }
2068 argc--; argv++;
2069 }
2070
2071 if (!address_found) {
2072 fprintf(stderr, "need at least a destination address\n");
2073 return -1;
2074 }
2075
2076 if (idev || odev) {
2077 int idx;
2078
2079 if (idev) {
2080 idx = ll_name_to_index(idev);
2081 if (!idx)
2082 return nodev(idev);
2083 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
2084 }
2085 if (odev) {
2086 idx = ll_name_to_index(odev);
2087 if (!idx)
2088 return nodev(odev);
2089 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
2090 }
2091 }
2092 if (mark)
2093 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
2094
2095 if (req.r.rtm_family == AF_UNSPEC)
2096 req.r.rtm_family = AF_INET;
2097
2098 /* Only IPv4 supports the RTM_F_LOOKUP_TABLE flag */
2099 if (req.r.rtm_family == AF_INET)
2100 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
2101 if (fib_match)
2102 req.r.rtm_flags |= RTM_F_FIB_MATCH;
2103
2104 if (rtnl_talk(&rth, &req.n, &answer) < 0)
2105 return -2;
2106
2107 new_json_obj(json);
2108
2109 if (connected && !from_ok) {
2110 struct rtmsg *r = NLMSG_DATA(answer);
2111 int len = answer->nlmsg_len;
2112 struct rtattr *tb[RTA_MAX+1];
2113
2114 if (print_route(answer, (void *)stdout) < 0) {
2115 fprintf(stderr, "An error :-)\n");
2116 free(answer);
2117 return -1;
2118 }
2119
2120 if (answer->nlmsg_type != RTM_NEWROUTE) {
2121 fprintf(stderr, "Not a route?\n");
2122 free(answer);
2123 return -1;
2124 }
2125 len -= NLMSG_LENGTH(sizeof(*r));
2126 if (len < 0) {
2127 fprintf(stderr, "Wrong len %d\n", len);
2128 free(answer);
2129 return -1;
2130 }
2131
2132 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2133
2134 if (tb[RTA_PREFSRC]) {
2135 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
2136 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
2137 } else if (!tb[RTA_SRC]) {
2138 fprintf(stderr, "Failed to connect the route\n");
2139 free(answer);
2140 return -1;
2141 }
2142 if (!odev && tb[RTA_OIF])
2143 tb[RTA_OIF]->rta_type = 0;
2144 if (tb[RTA_GATEWAY])
2145 tb[RTA_GATEWAY]->rta_type = 0;
2146 if (tb[RTA_VIA])
2147 tb[RTA_VIA]->rta_type = 0;
2148 if (!idev && tb[RTA_IIF])
2149 tb[RTA_IIF]->rta_type = 0;
2150 req.n.nlmsg_flags = NLM_F_REQUEST;
2151 req.n.nlmsg_type = RTM_GETROUTE;
2152
2153 delete_json_obj();
2154 free(answer);
2155 if (rtnl_talk(&rth, &req.n, &answer) < 0)
2156 return -2;
2157 }
2158
2159 if (print_route(answer, (void *)stdout) < 0) {
2160 fprintf(stderr, "An error :-)\n");
2161 free(answer);
2162 return -1;
2163 }
2164
2165 delete_json_obj();
2166 free(answer);
2167 return 0;
2168 }
2169
2170 static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
2171 {
2172 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
2173 return 1;
2174
2175 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
2176 }
2177
2178 static int restore_handler(struct rtnl_ctrl_data *ctrl,
2179 struct nlmsghdr *n, void *arg)
2180 {
2181 struct rtmsg *r = NLMSG_DATA(n);
2182 struct rtattr *tb[RTA_MAX+1];
2183 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
2184 int ret, prio = *(int *)arg;
2185
2186 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2187
2188 /* Restore routes in correct order:
2189 * 0. ones for local addresses,
2190 * 1. ones for local networks,
2191 * 2. others (remote networks/hosts).
2192 */
2193 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
2194 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
2195 goto restore;
2196 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
2197 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
2198 goto restore;
2199 else if (prio == 2 && tb[RTA_GATEWAY])
2200 goto restore;
2201
2202 return 0;
2203
2204 restore:
2205 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
2206
2207 ll_init_map(&rth);
2208
2209 ret = rtnl_talk(&rth, n, NULL);
2210 if ((ret < 0) && (errno == EEXIST))
2211 ret = 0;
2212
2213 return ret;
2214 }
2215
2216 static int route_dump_check_magic(void)
2217 {
2218 int ret;
2219 __u32 magic = 0;
2220
2221 if (isatty(STDIN_FILENO)) {
2222 fprintf(stderr, "Can't restore route dump from a terminal\n");
2223 return -1;
2224 }
2225
2226 ret = fread(&magic, sizeof(magic), 1, stdin);
2227 if (magic != route_dump_magic) {
2228 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
2229 return -1;
2230 }
2231
2232 return 0;
2233 }
2234
2235 static int iproute_restore(void)
2236 {
2237 int pos, prio;
2238
2239 if (route_dump_check_magic())
2240 return -1;
2241
2242 pos = ftell(stdin);
2243 if (pos == -1) {
2244 perror("Failed to restore: ftell");
2245 return -1;
2246 }
2247
2248 for (prio = 0; prio < 3; prio++) {
2249 int err;
2250
2251 err = rtnl_from_file(stdin, &restore_handler, &prio);
2252 if (err)
2253 return -2;
2254
2255 if (fseek(stdin, pos, SEEK_SET) == -1) {
2256 perror("Failed to restore: fseek");
2257 return -1;
2258 }
2259 }
2260
2261 return 0;
2262 }
2263
2264 static int show_handler(struct rtnl_ctrl_data *ctrl,
2265 struct nlmsghdr *n, void *arg)
2266 {
2267 print_route(n, stdout);
2268 return 0;
2269 }
2270
2271 static int iproute_showdump(void)
2272 {
2273 if (route_dump_check_magic())
2274 return -1;
2275
2276 if (rtnl_from_file(stdin, &show_handler, NULL))
2277 return -2;
2278
2279 return 0;
2280 }
2281
2282 void iproute_reset_filter(int ifindex)
2283 {
2284 memset(&filter, 0, sizeof(filter));
2285 filter.mdst.bitlen = -1;
2286 filter.msrc.bitlen = -1;
2287 filter.oif = ifindex;
2288 if (filter.oif > 0)
2289 filter.oifmask = -1;
2290 }
2291
2292 int do_iproute(int argc, char **argv)
2293 {
2294 if (argc < 1)
2295 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
2296
2297 if (matches(*argv, "add") == 0)
2298 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
2299 argc-1, argv+1);
2300 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
2301 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
2302 argc-1, argv+1);
2303 if (matches(*argv, "replace") == 0)
2304 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
2305 argc-1, argv+1);
2306 if (matches(*argv, "prepend") == 0)
2307 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
2308 argc-1, argv+1);
2309 if (matches(*argv, "append") == 0)
2310 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
2311 argc-1, argv+1);
2312 if (matches(*argv, "test") == 0)
2313 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
2314 argc-1, argv+1);
2315 if (matches(*argv, "delete") == 0)
2316 return iproute_modify(RTM_DELROUTE, 0,
2317 argc-1, argv+1);
2318 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2319 || matches(*argv, "lst") == 0)
2320 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
2321 if (matches(*argv, "get") == 0)
2322 return iproute_get(argc-1, argv+1);
2323 if (matches(*argv, "flush") == 0)
2324 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2325 if (matches(*argv, "save") == 0)
2326 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2327 if (matches(*argv, "restore") == 0)
2328 return iproute_restore();
2329 if (matches(*argv, "showdump") == 0)
2330 return iproute_showdump();
2331 if (matches(*argv, "help") == 0)
2332 usage();
2333
2334 fprintf(stderr,
2335 "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
2336 exit(-1);
2337 }
Upstream mirror of iproute2