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1 /*
2 * iproute.c "ip route".
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 */
12
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <unistd.h>
16 #include <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 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 static 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
372 close_json_array(PRINT_JSON, NULL);
373 }
374
375 static void print_rt_pref(FILE *fp, unsigned int pref)
376 {
377
378 switch (pref) {
379 case ICMPV6_ROUTER_PREF_LOW:
380 print_string(PRINT_ANY,
381 "pref", "pref %s", "low");
382 break;
383 case ICMPV6_ROUTER_PREF_MEDIUM:
384 print_string(PRINT_ANY,
385 "pref", "pref %s", "medium");
386 break;
387 case ICMPV6_ROUTER_PREF_HIGH:
388 print_string(PRINT_ANY,
389 "pref", "pref %s", "high");
390 break;
391 default:
392 print_uint(PRINT_ANY,
393 "pref", "%u", pref);
394 }
395 }
396
397 static void print_rta_if(FILE *fp, const struct rtattr *rta,
398 const char *prefix)
399 {
400 const char *ifname = ll_index_to_name(rta_getattr_u32(rta));
401
402 if (is_json_context())
403 print_string(PRINT_JSON, prefix, NULL, ifname);
404 else {
405 fprintf(fp, "%s ", prefix);
406 color_fprintf(fp, COLOR_IFNAME, "%s ", ifname);
407 }
408 }
409
410 static void print_cache_flags(FILE *fp, __u32 flags)
411 {
412 json_writer_t *jw = get_json_writer();
413 flags &= ~0xFFFF;
414
415 if (jw) {
416 jsonw_name(jw, "cache");
417 jsonw_start_array(jw);
418 } else {
419 fprintf(fp, "%s cache ", _SL_);
420 if (flags == 0)
421 return;
422 putc('<', fp);
423 }
424
425 #define PRTFL(fl, flname) \
426 if (flags & RTCF_##fl) { \
427 flags &= ~RTCF_##fl; \
428 if (jw) \
429 jsonw_string(jw, flname); \
430 else \
431 fprintf(fp, "%s%s", flname, flags ? "," : "> "); \
432 }
433
434 PRTFL(LOCAL, "local");
435 PRTFL(REJECT, "reject");
436 PRTFL(MULTICAST, "mc");
437 PRTFL(BROADCAST, "brd");
438 PRTFL(DNAT, "dst-nat");
439 PRTFL(SNAT, "src-nat");
440 PRTFL(MASQ, "masq");
441 PRTFL(DIRECTDST, "dst-direct");
442 PRTFL(DIRECTSRC, "src-direct");
443 PRTFL(REDIRECTED, "redirected");
444 PRTFL(DOREDIRECT, "redirect");
445 PRTFL(FAST, "fastroute");
446 PRTFL(NOTIFY, "notify");
447 PRTFL(TPROXY, "proxy");
448 #undef PRTFL
449
450 if (flags)
451 print_hex(PRINT_ANY, "flags", "%x>", flags);
452
453 if (jw)
454 jsonw_end_array(jw);
455 }
456
457 static void print_rta_cacheinfo(FILE *fp, const struct rta_cacheinfo *ci)
458 {
459 static int hz;
460
461 if (!hz)
462 hz = get_user_hz();
463
464 if (ci->rta_expires != 0)
465 print_int(PRINT_ANY, "expires",
466 "expires %dsec ", ci->rta_expires/hz);
467 if (ci->rta_error != 0)
468 print_uint(PRINT_ANY, "error",
469 "error %u ", ci->rta_error);
470
471 if (show_stats) {
472 if (ci->rta_clntref)
473 print_uint(PRINT_ANY, "users",
474 "users %u ", ci->rta_clntref);
475 if (ci->rta_used != 0)
476 print_uint(PRINT_ANY, "used",
477 "used %u ", ci->rta_used);
478 if (ci->rta_lastuse != 0)
479 print_uint(PRINT_ANY, "age",
480 "age %usec ", ci->rta_lastuse/hz);
481 }
482 if (ci->rta_id)
483 print_0xhex(PRINT_ANY, "ipid",
484 "ipid 0x%04llx ", ci->rta_id);
485 if (ci->rta_ts || ci->rta_tsage) {
486 print_0xhex(PRINT_ANY, "ts",
487 "ts 0x%llx", ci->rta_ts);
488 print_uint(PRINT_ANY, "tsage",
489 "tsage %usec ", ci->rta_tsage);
490 }
491 }
492
493 static void print_rta_flow(FILE *fp, const struct rtattr *rta)
494 {
495 __u32 to = rta_getattr_u32(rta);
496 __u32 from = to >> 16;
497 SPRINT_BUF(b1);
498
499 to &= 0xFFFF;
500 if (is_json_context()) {
501 open_json_object("flow");
502
503 if (from)
504 print_string(PRINT_JSON, "from", NULL,
505 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
506 print_string(PRINT_JSON, "to", NULL,
507 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
508 close_json_object();
509 } else {
510 fprintf(fp, "realm%s ", from ? "s" : "");
511
512 if (from)
513 print_string(PRINT_FP, NULL, "%s/",
514 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
515 print_string(PRINT_FP, NULL, "%s ",
516 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
517 }
518 }
519
520 static void print_rta_newdst(FILE *fp, const struct rtmsg *r,
521 const struct rtattr *rta)
522 {
523 const char *newdst = format_host_rta(r->rtm_family, rta);
524
525 if (is_json_context())
526 print_string(PRINT_JSON, "to", NULL, newdst);
527 else {
528 fprintf(fp, "as to ");
529 print_color_string(PRINT_FP,
530 ifa_family_color(r->rtm_family),
531 NULL, "%s ", newdst);
532 }
533 }
534
535 static void print_rta_gateway(FILE *fp, const struct rtmsg *r,
536 const struct rtattr *rta)
537 {
538 const char *gateway = format_host_rta(r->rtm_family, rta);
539
540 if (is_json_context())
541 print_string(PRINT_JSON, "gateway", NULL, gateway);
542 else {
543 fprintf(fp, "via ");
544 print_color_string(PRINT_FP,
545 ifa_family_color(r->rtm_family),
546 NULL, "%s ", gateway);
547 }
548 }
549
550 static void print_rta_via(FILE *fp, const struct rtattr *rta)
551 {
552 size_t len = RTA_PAYLOAD(rta) - 2;
553 const struct rtvia *via = RTA_DATA(rta);
554
555 if (is_json_context()) {
556 open_json_object("via");
557 print_string(PRINT_JSON, "family", NULL,
558 family_name(via->rtvia_family));
559 print_string(PRINT_JSON, "host", NULL,
560 format_host(via->rtvia_family, len,
561 via->rtvia_addr));
562 close_json_object();
563 } else {
564 print_string(PRINT_FP, NULL, "via %s ",
565 family_name(via->rtvia_family));
566 print_color_string(PRINT_FP,
567 ifa_family_color(via->rtvia_family),
568 NULL, "%s ",
569 format_host(via->rtvia_family,
570 len, via->rtvia_addr));
571 }
572 }
573
574 static void print_rta_metrics(FILE *fp, const struct rtattr *rta)
575 {
576 struct rtattr *mxrta[RTAX_MAX+1];
577 unsigned int mxlock = 0;
578 int i;
579
580 open_json_array(PRINT_JSON, "metrics");
581
582 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta));
583
584 if (mxrta[RTAX_LOCK])
585 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
586
587 for (i = 2; i <= RTAX_MAX; i++) {
588 __u32 val = 0U;
589
590 if (mxrta[i] == NULL && !(mxlock & (1 << i)))
591 continue;
592
593 if (mxrta[i] != NULL && i != RTAX_CC_ALGO)
594 val = rta_getattr_u32(mxrta[i]);
595
596 if (i == RTAX_HOPLIMIT && (int)val == -1)
597 continue;
598
599 if (!is_json_context()) {
600 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
601 fprintf(fp, "%s ", mx_names[i]);
602 else
603 fprintf(fp, "metric %d ", i);
604
605 if (mxlock & (1<<i))
606 fprintf(fp, "lock ");
607 }
608
609 switch (i) {
610 case RTAX_FEATURES:
611 print_rtax_features(fp, val);
612 break;
613 default:
614 fprintf(fp, "%u ", val);
615 break;
616
617 case RTAX_RTT:
618 case RTAX_RTTVAR:
619 case RTAX_RTO_MIN:
620 if (i == RTAX_RTT)
621 val /= 8;
622 else if (i == RTAX_RTTVAR)
623 val /= 4;
624
625 if (is_json_context())
626 print_uint(PRINT_JSON, mx_names[i],
627 NULL, val);
628 else {
629 if (val >= 1000)
630 fprintf(fp, "%gs ", val/1e3);
631 else
632 fprintf(fp, "%ums ", val);
633 }
634 break;
635 case RTAX_CC_ALGO:
636 print_string(PRINT_ANY, "congestion",
637 "%s ", rta_getattr_str(mxrta[i]));
638 break;
639 }
640 }
641
642 close_json_array(PRINT_JSON, NULL);
643 }
644
645 static void print_rta_multipath(FILE *fp, const struct rtmsg *r,
646 struct rtattr *rta)
647 {
648 const struct rtnexthop *nh = RTA_DATA(rta);
649 int len = RTA_PAYLOAD(rta);
650 int first = 1;
651
652 while (len >= sizeof(*nh)) {
653 struct rtattr *tb[RTA_MAX + 1];
654
655 if (nh->rtnh_len > len)
656 break;
657
658 if (!is_json_context()) {
659 if ((r->rtm_flags & RTM_F_CLONED) &&
660 r->rtm_type == RTN_MULTICAST) {
661 if (first) {
662 fprintf(fp, "Oifs: ");
663 first = 0;
664 } else {
665 fprintf(fp, " ");
666 }
667 } else
668 fprintf(fp, "%s\tnexthop ", _SL_);
669 }
670
671 if (nh->rtnh_len > sizeof(*nh)) {
672 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh),
673 nh->rtnh_len - sizeof(*nh));
674
675 if (tb[RTA_ENCAP])
676 lwt_print_encap(fp,
677 tb[RTA_ENCAP_TYPE],
678 tb[RTA_ENCAP]);
679 if (tb[RTA_NEWDST])
680 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
681 if (tb[RTA_GATEWAY])
682 print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
683 if (tb[RTA_VIA])
684 print_rta_via(fp, tb[RTA_VIA]);
685 if (tb[RTA_FLOW])
686 print_rta_flow(fp, tb[RTA_FLOW]);
687 }
688
689 if ((r->rtm_flags & RTM_F_CLONED) &&
690 r->rtm_type == RTN_MULTICAST) {
691 fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
692 if (nh->rtnh_hops != 1)
693 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
694 fprintf(fp, " ");
695 } else {
696 fprintf(fp, "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
697 if (r->rtm_family != AF_MPLS)
698 fprintf(fp, "weight %d ",
699 nh->rtnh_hops+1);
700 }
701
702 print_rt_flags(fp, nh->rtnh_flags);
703
704 len -= NLMSG_ALIGN(nh->rtnh_len);
705 nh = RTNH_NEXT(nh);
706 }
707 }
708
709 int print_route(struct nlmsghdr *n, void *arg)
710 {
711 FILE *fp = (FILE *)arg;
712 struct rtmsg *r = NLMSG_DATA(n);
713 int len = n->nlmsg_len;
714 struct rtattr *tb[RTA_MAX+1];
715 int family, color, host_len;
716 __u32 table;
717 int ret;
718
719 SPRINT_BUF(b1);
720
721 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
722 fprintf(stderr, "Not a route: %08x %08x %08x\n",
723 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
724 return -1;
725 }
726 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
727 return 0;
728 len -= NLMSG_LENGTH(sizeof(*r));
729 if (len < 0) {
730 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
731 return -1;
732 }
733
734 host_len = af_bit_len(r->rtm_family);
735
736 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
737 table = rtm_get_table(r, tb);
738
739 if (!filter_nlmsg(n, tb, host_len))
740 return 0;
741
742 if (filter.flushb) {
743 struct nlmsghdr *fn;
744
745 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
746 ret = flush_update();
747 if (ret < 0)
748 return ret;
749 }
750 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
751 memcpy(fn, n, n->nlmsg_len);
752 fn->nlmsg_type = RTM_DELROUTE;
753 fn->nlmsg_flags = NLM_F_REQUEST;
754 fn->nlmsg_seq = ++rth.seq;
755 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
756 filter.flushed++;
757 if (show_stats < 2)
758 return 0;
759 }
760
761 open_json_object(NULL);
762 if (n->nlmsg_type == RTM_DELROUTE)
763 print_bool(PRINT_ANY, "deleted", "Deleted ", true);
764
765 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
766 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
767 print_string(PRINT_ANY, "type", "%s ",
768 rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
769
770 color = COLOR_NONE;
771 if (tb[RTA_DST]) {
772 family = get_real_family(r->rtm_type, r->rtm_family);
773 color = ifa_family_color(family);
774
775 if (r->rtm_dst_len != host_len) {
776 snprintf(b1, sizeof(b1),
777 "%s/%u", rt_addr_n2a_rta(family, tb[RTA_DST]),
778 r->rtm_dst_len);
779 } else {
780 format_host_rta_r(family, tb[RTA_DST],
781 b1, sizeof(b1));
782
783 }
784 } else if (r->rtm_dst_len) {
785 snprintf(b1, sizeof(b1), "0/%d ", r->rtm_dst_len);
786 } else {
787 strncpy(b1, "default", sizeof(b1));
788 }
789 print_color_string(PRINT_ANY, color,
790 "dst", "%s ", b1);
791
792 if (tb[RTA_SRC]) {
793 family = get_real_family(r->rtm_type, r->rtm_family);
794 color = ifa_family_color(family);
795
796 if (r->rtm_src_len != host_len) {
797 snprintf(b1, sizeof(b1),
798 "%s/%u",
799 rt_addr_n2a_rta(family, tb[RTA_SRC]),
800 r->rtm_src_len);
801 } else {
802 format_host_rta_r(family, tb[RTA_SRC],
803 b1, sizeof(b1));
804 }
805 print_color_string(PRINT_ANY, color,
806 "from", "from %s ", b1);
807 } else if (r->rtm_src_len) {
808 snprintf(b1, sizeof(b1), "0/%u", r->rtm_src_len);
809
810 print_string(PRINT_ANY, "src", "from %s ", b1);
811 }
812
813 if (tb[RTA_NEWDST])
814 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
815
816 if (tb[RTA_ENCAP])
817 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
818
819 if (r->rtm_tos && filter.tosmask != -1) {
820 print_string(PRINT_ANY, "tos", "tos %s ",
821 rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
822 }
823
824 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len)
825 print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
826
827 if (tb[RTA_VIA])
828 print_rta_via(fp, tb[RTA_VIA]);
829
830 if (tb[RTA_OIF] && filter.oifmask != -1)
831 print_rta_if(fp, tb[RTA_OIF], "dev");
832
833 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
834 print_string(PRINT_ANY,
835 "table", "table %s ",
836 rtnl_rttable_n2a(table, b1, sizeof(b1)));
837
838 if (!(r->rtm_flags & RTM_F_CLONED)) {
839 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) &&
840 filter.protocolmask != -1)
841 print_string(PRINT_ANY,
842 "protocol", "proto %s ",
843 rtnl_rtprot_n2a(r->rtm_protocol,
844 b1, sizeof(b1)));
845
846 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) &&
847 filter.scopemask != -1)
848 print_string(PRINT_ANY,
849 "scope", "scope %s ",
850 rtnl_rtscope_n2a(r->rtm_scope,
851 b1, sizeof(b1)));
852 }
853
854 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
855 const char *psrc
856 = rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]);
857
858 /* Do not use format_host(). It is our local addr
859 and symbolic name will not be useful.
860 */
861 if (is_json_context())
862 print_string(PRINT_JSON, "prefsrc", NULL, psrc);
863 else {
864 fprintf(fp, "src ");
865 print_color_string(PRINT_FP,
866 ifa_family_color(r->rtm_family),
867 NULL, "%s ", psrc);
868 }
869
870 }
871
872 if (tb[RTA_PRIORITY] && filter.metricmask != -1)
873 print_uint(PRINT_ANY, "metric", "metric %u ",
874 rta_getattr_u32(tb[RTA_PRIORITY]));
875
876 print_rt_flags(fp, r->rtm_flags);
877
878 if (tb[RTA_MARK]) {
879 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
880
881 if (mark) {
882 if (is_json_context())
883 print_uint(PRINT_JSON, "mark", NULL, mark);
884 else if (mark >= 16)
885 print_0xhex(PRINT_FP, NULL,
886 "mark 0x%llx ", mark);
887 else
888 print_uint(PRINT_FP, NULL,
889 "mark %u ", mark);
890 }
891 }
892
893 if (tb[RTA_FLOW] && filter.realmmask != ~0U)
894 print_rta_flow(fp, tb[RTA_FLOW]);
895
896 if (tb[RTA_UID])
897 print_uint(PRINT_ANY, "uid", "uid %u ",
898 rta_getattr_u32(tb[RTA_UID]));
899
900 if (r->rtm_family == AF_INET) {
901 if (r->rtm_flags & RTM_F_CLONED)
902 print_cache_flags(fp, r->rtm_flags);
903
904 if (tb[RTA_CACHEINFO])
905 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
906 } else if (r->rtm_family == AF_INET6) {
907 if (tb[RTA_CACHEINFO])
908 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
909 }
910
911 if (tb[RTA_METRICS])
912 print_rta_metrics(fp, tb[RTA_METRICS]);
913
914 if (tb[RTA_IIF] && filter.iifmask != -1)
915 print_rta_if(fp, tb[RTA_IIF], "iif");
916
917 if (tb[RTA_MULTIPATH])
918 print_rta_multipath(fp, r, tb[RTA_MULTIPATH]);
919
920 if (tb[RTA_PREF])
921 print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));
922
923 if (tb[RTA_TTL_PROPAGATE]) {
924 bool propagate = rta_getattr_u8(tb[RTA_TTL_PROPAGATE]);
925
926 if (is_json_context())
927 print_bool(PRINT_JSON, "ttl-propogate", NULL,
928 propagate);
929 else
930 print_string(PRINT_FP, NULL,
931 "ttl-propogate %s",
932 propagate ? "enabled" : "disabled");
933 }
934
935 print_string(PRINT_FP, NULL, "\n", NULL);
936 close_json_object();
937 fflush(fp);
938 return 0;
939 }
940
941 static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
942 struct rtattr *rta, size_t len, struct rtnexthop *rtnh,
943 int *argcp, char ***argvp)
944 {
945 int argc = *argcp;
946 char **argv = *argvp;
947
948 while (++argv, --argc > 0) {
949 if (strcmp(*argv, "via") == 0) {
950 inet_prefix addr;
951 int family;
952
953 NEXT_ARG();
954 family = read_family(*argv);
955 if (family == AF_UNSPEC)
956 family = r->rtm_family;
957 else
958 NEXT_ARG();
959 get_addr(&addr, *argv, family);
960 if (r->rtm_family == AF_UNSPEC)
961 r->rtm_family = addr.family;
962 if (addr.family == r->rtm_family) {
963 if (rta_addattr_l(rta, len, RTA_GATEWAY,
964 &addr.data, addr.bytelen))
965 return -1;
966 rtnh->rtnh_len += sizeof(struct rtattr)
967 + addr.bytelen;
968 } else {
969 if (rta_addattr_l(rta, len, RTA_VIA,
970 &addr.family, addr.bytelen + 2))
971 return -1;
972 rtnh->rtnh_len += RTA_SPACE(addr.bytelen + 2);
973 }
974 } else if (strcmp(*argv, "dev") == 0) {
975 NEXT_ARG();
976 rtnh->rtnh_ifindex = ll_name_to_index(*argv);
977 if (!rtnh->rtnh_ifindex)
978 return nodev(*argv);
979 } else if (strcmp(*argv, "weight") == 0) {
980 unsigned int w;
981
982 NEXT_ARG();
983 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
984 invarg("\"weight\" is invalid\n", *argv);
985 rtnh->rtnh_hops = w - 1;
986 } else if (strcmp(*argv, "onlink") == 0) {
987 rtnh->rtnh_flags |= RTNH_F_ONLINK;
988 } else if (matches(*argv, "realms") == 0) {
989 __u32 realm;
990
991 NEXT_ARG();
992 if (get_rt_realms_or_raw(&realm, *argv))
993 invarg("\"realm\" value is invalid\n", *argv);
994 if (rta_addattr32(rta, len, RTA_FLOW, realm))
995 return -1;
996 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
997 } else if (strcmp(*argv, "encap") == 0) {
998 int old_len = rta->rta_len;
999
1000 if (lwt_parse_encap(rta, len, &argc, &argv))
1001 return -1;
1002 rtnh->rtnh_len += rta->rta_len - old_len;
1003 } else if (strcmp(*argv, "as") == 0) {
1004 inet_prefix addr;
1005
1006 NEXT_ARG();
1007 if (strcmp(*argv, "to") == 0)
1008 NEXT_ARG();
1009 get_addr(&addr, *argv, r->rtm_family);
1010 if (rta_addattr_l(rta, len, RTA_NEWDST,
1011 &addr.data, addr.bytelen))
1012 return -1;
1013 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
1014 } else
1015 break;
1016 }
1017 *argcp = argc;
1018 *argvp = argv;
1019 return 0;
1020 }
1021
1022 static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
1023 int argc, char **argv)
1024 {
1025 char buf[4096];
1026 struct rtattr *rta = (void *)buf;
1027 struct rtnexthop *rtnh;
1028
1029 rta->rta_type = RTA_MULTIPATH;
1030 rta->rta_len = RTA_LENGTH(0);
1031 rtnh = RTA_DATA(rta);
1032
1033 while (argc > 0) {
1034 if (strcmp(*argv, "nexthop") != 0) {
1035 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
1036 exit(-1);
1037 }
1038 if (argc <= 1) {
1039 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
1040 exit(-1);
1041 }
1042 memset(rtnh, 0, sizeof(*rtnh));
1043 rtnh->rtnh_len = sizeof(*rtnh);
1044 rta->rta_len += rtnh->rtnh_len;
1045 if (parse_one_nh(n, r, rta, 4096, rtnh, &argc, &argv)) {
1046 fprintf(stderr, "Error: cannot parse nexthop\n");
1047 exit(-1);
1048 }
1049 rtnh = RTNH_NEXT(rtnh);
1050 }
1051
1052 if (rta->rta_len > RTA_LENGTH(0))
1053 return addattr_l(n, 4096, RTA_MULTIPATH,
1054 RTA_DATA(rta), RTA_PAYLOAD(rta));
1055 return 0;
1056 }
1057
1058 static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
1059 {
1060 struct {
1061 struct nlmsghdr n;
1062 struct rtmsg r;
1063 char buf[4096];
1064 } req = {
1065 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1066 .n.nlmsg_flags = NLM_F_REQUEST | flags,
1067 .n.nlmsg_type = cmd,
1068 .r.rtm_family = preferred_family,
1069 .r.rtm_table = RT_TABLE_MAIN,
1070 .r.rtm_scope = RT_SCOPE_NOWHERE,
1071 };
1072 char mxbuf[256];
1073 struct rtattr *mxrta = (void *)mxbuf;
1074 unsigned int mxlock = 0;
1075 char *d = NULL;
1076 int gw_ok = 0;
1077 int dst_ok = 0;
1078 int nhs_ok = 0;
1079 int scope_ok = 0;
1080 int table_ok = 0;
1081 int raw = 0;
1082 int type_ok = 0;
1083
1084 if (cmd != RTM_DELROUTE) {
1085 req.r.rtm_protocol = RTPROT_BOOT;
1086 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1087 req.r.rtm_type = RTN_UNICAST;
1088 }
1089
1090 mxrta->rta_type = RTA_METRICS;
1091 mxrta->rta_len = RTA_LENGTH(0);
1092
1093 while (argc > 0) {
1094 if (strcmp(*argv, "src") == 0) {
1095 inet_prefix addr;
1096
1097 NEXT_ARG();
1098 get_addr(&addr, *argv, req.r.rtm_family);
1099 if (req.r.rtm_family == AF_UNSPEC)
1100 req.r.rtm_family = addr.family;
1101 addattr_l(&req.n, sizeof(req),
1102 RTA_PREFSRC, &addr.data, addr.bytelen);
1103 } else if (strcmp(*argv, "as") == 0) {
1104 inet_prefix addr;
1105
1106 NEXT_ARG();
1107 if (strcmp(*argv, "to") == 0) {
1108 NEXT_ARG();
1109 }
1110 get_addr(&addr, *argv, req.r.rtm_family);
1111 if (req.r.rtm_family == AF_UNSPEC)
1112 req.r.rtm_family = addr.family;
1113 addattr_l(&req.n, sizeof(req),
1114 RTA_NEWDST, &addr.data, addr.bytelen);
1115 } else if (strcmp(*argv, "via") == 0) {
1116 inet_prefix addr;
1117 int family;
1118
1119 if (gw_ok) {
1120 invarg("use nexthop syntax to specify multiple via\n",
1121 *argv);
1122 }
1123 gw_ok = 1;
1124 NEXT_ARG();
1125 family = read_family(*argv);
1126 if (family == AF_UNSPEC)
1127 family = req.r.rtm_family;
1128 else
1129 NEXT_ARG();
1130 get_addr(&addr, *argv, family);
1131 if (req.r.rtm_family == AF_UNSPEC)
1132 req.r.rtm_family = addr.family;
1133 if (addr.family == req.r.rtm_family)
1134 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
1135 &addr.data, addr.bytelen);
1136 else
1137 addattr_l(&req.n, sizeof(req), RTA_VIA,
1138 &addr.family, addr.bytelen+2);
1139 } else if (strcmp(*argv, "from") == 0) {
1140 inet_prefix addr;
1141
1142 NEXT_ARG();
1143 get_prefix(&addr, *argv, req.r.rtm_family);
1144 if (req.r.rtm_family == AF_UNSPEC)
1145 req.r.rtm_family = addr.family;
1146 if (addr.bytelen)
1147 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1148 req.r.rtm_src_len = addr.bitlen;
1149 } else if (strcmp(*argv, "tos") == 0 ||
1150 matches(*argv, "dsfield") == 0) {
1151 __u32 tos;
1152
1153 NEXT_ARG();
1154 if (rtnl_dsfield_a2n(&tos, *argv))
1155 invarg("\"tos\" value is invalid\n", *argv);
1156 req.r.rtm_tos = tos;
1157 } else if (strcmp(*argv, "expires") == 0) {
1158 __u32 expires;
1159
1160 NEXT_ARG();
1161 if (get_u32(&expires, *argv, 0))
1162 invarg("\"expires\" value is invalid\n", *argv);
1163 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
1164 } else if (matches(*argv, "metric") == 0 ||
1165 matches(*argv, "priority") == 0 ||
1166 strcmp(*argv, "preference") == 0) {
1167 __u32 metric;
1168
1169 NEXT_ARG();
1170 if (get_u32(&metric, *argv, 0))
1171 invarg("\"metric\" value is invalid\n", *argv);
1172 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
1173 } else if (strcmp(*argv, "scope") == 0) {
1174 __u32 scope = 0;
1175
1176 NEXT_ARG();
1177 if (rtnl_rtscope_a2n(&scope, *argv))
1178 invarg("invalid \"scope\" value\n", *argv);
1179 req.r.rtm_scope = scope;
1180 scope_ok = 1;
1181 } else if (strcmp(*argv, "mtu") == 0) {
1182 unsigned int mtu;
1183
1184 NEXT_ARG();
1185 if (strcmp(*argv, "lock") == 0) {
1186 mxlock |= (1<<RTAX_MTU);
1187 NEXT_ARG();
1188 }
1189 if (get_unsigned(&mtu, *argv, 0))
1190 invarg("\"mtu\" value is invalid\n", *argv);
1191 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
1192 } else if (strcmp(*argv, "hoplimit") == 0) {
1193 unsigned int hoplimit;
1194
1195 NEXT_ARG();
1196 if (strcmp(*argv, "lock") == 0) {
1197 mxlock |= (1<<RTAX_HOPLIMIT);
1198 NEXT_ARG();
1199 }
1200 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
1201 invarg("\"hoplimit\" value is invalid\n", *argv);
1202 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
1203 } else if (strcmp(*argv, "advmss") == 0) {
1204 unsigned int mss;
1205
1206 NEXT_ARG();
1207 if (strcmp(*argv, "lock") == 0) {
1208 mxlock |= (1<<RTAX_ADVMSS);
1209 NEXT_ARG();
1210 }
1211 if (get_unsigned(&mss, *argv, 0))
1212 invarg("\"mss\" value is invalid\n", *argv);
1213 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
1214 } else if (matches(*argv, "reordering") == 0) {
1215 unsigned int reord;
1216
1217 NEXT_ARG();
1218 if (strcmp(*argv, "lock") == 0) {
1219 mxlock |= (1<<RTAX_REORDERING);
1220 NEXT_ARG();
1221 }
1222 if (get_unsigned(&reord, *argv, 0))
1223 invarg("\"reordering\" value is invalid\n", *argv);
1224 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1225 } else if (strcmp(*argv, "rtt") == 0) {
1226 unsigned int rtt;
1227
1228 NEXT_ARG();
1229 if (strcmp(*argv, "lock") == 0) {
1230 mxlock |= (1<<RTAX_RTT);
1231 NEXT_ARG();
1232 }
1233 if (get_time_rtt(&rtt, *argv, &raw))
1234 invarg("\"rtt\" value is invalid\n", *argv);
1235 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1236 (raw) ? rtt : rtt * 8);
1237 } else if (strcmp(*argv, "rto_min") == 0) {
1238 unsigned int rto_min;
1239
1240 NEXT_ARG();
1241 mxlock |= (1<<RTAX_RTO_MIN);
1242 if (get_time_rtt(&rto_min, *argv, &raw))
1243 invarg("\"rto_min\" value is invalid\n",
1244 *argv);
1245 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1246 rto_min);
1247 } else if (matches(*argv, "window") == 0) {
1248 unsigned int win;
1249
1250 NEXT_ARG();
1251 if (strcmp(*argv, "lock") == 0) {
1252 mxlock |= (1<<RTAX_WINDOW);
1253 NEXT_ARG();
1254 }
1255 if (get_unsigned(&win, *argv, 0))
1256 invarg("\"window\" value is invalid\n", *argv);
1257 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1258 } else if (matches(*argv, "cwnd") == 0) {
1259 unsigned int win;
1260
1261 NEXT_ARG();
1262 if (strcmp(*argv, "lock") == 0) {
1263 mxlock |= (1<<RTAX_CWND);
1264 NEXT_ARG();
1265 }
1266 if (get_unsigned(&win, *argv, 0))
1267 invarg("\"cwnd\" value is invalid\n", *argv);
1268 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1269 } else if (matches(*argv, "initcwnd") == 0) {
1270 unsigned int win;
1271
1272 NEXT_ARG();
1273 if (strcmp(*argv, "lock") == 0) {
1274 mxlock |= (1<<RTAX_INITCWND);
1275 NEXT_ARG();
1276 }
1277 if (get_unsigned(&win, *argv, 0))
1278 invarg("\"initcwnd\" value is invalid\n", *argv);
1279 rta_addattr32(mxrta, sizeof(mxbuf),
1280 RTAX_INITCWND, win);
1281 } else if (matches(*argv, "initrwnd") == 0) {
1282 unsigned int win;
1283
1284 NEXT_ARG();
1285 if (strcmp(*argv, "lock") == 0) {
1286 mxlock |= (1<<RTAX_INITRWND);
1287 NEXT_ARG();
1288 }
1289 if (get_unsigned(&win, *argv, 0))
1290 invarg("\"initrwnd\" value is invalid\n", *argv);
1291 rta_addattr32(mxrta, sizeof(mxbuf),
1292 RTAX_INITRWND, win);
1293 } else if (matches(*argv, "features") == 0) {
1294 unsigned int features = 0;
1295
1296 while (argc > 0) {
1297 NEXT_ARG();
1298
1299 if (strcmp(*argv, "ecn") == 0)
1300 features |= RTAX_FEATURE_ECN;
1301 else
1302 invarg("\"features\" value not valid\n", *argv);
1303 break;
1304 }
1305
1306 rta_addattr32(mxrta, sizeof(mxbuf),
1307 RTAX_FEATURES, features);
1308 } else if (matches(*argv, "quickack") == 0) {
1309 unsigned int quickack;
1310
1311 NEXT_ARG();
1312 if (get_unsigned(&quickack, *argv, 0))
1313 invarg("\"quickack\" value is invalid\n", *argv);
1314 if (quickack != 1 && quickack != 0)
1315 invarg("\"quickack\" value should be 0 or 1\n", *argv);
1316 rta_addattr32(mxrta, sizeof(mxbuf),
1317 RTAX_QUICKACK, quickack);
1318 } else if (matches(*argv, "congctl") == 0) {
1319 NEXT_ARG();
1320 if (strcmp(*argv, "lock") == 0) {
1321 mxlock |= 1 << RTAX_CC_ALGO;
1322 NEXT_ARG();
1323 }
1324 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1325 strlen(*argv));
1326 } else if (matches(*argv, "rttvar") == 0) {
1327 unsigned int win;
1328
1329 NEXT_ARG();
1330 if (strcmp(*argv, "lock") == 0) {
1331 mxlock |= (1<<RTAX_RTTVAR);
1332 NEXT_ARG();
1333 }
1334 if (get_time_rtt(&win, *argv, &raw))
1335 invarg("\"rttvar\" value is invalid\n", *argv);
1336 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1337 (raw) ? win : win * 4);
1338 } else if (matches(*argv, "ssthresh") == 0) {
1339 unsigned int win;
1340
1341 NEXT_ARG();
1342 if (strcmp(*argv, "lock") == 0) {
1343 mxlock |= (1<<RTAX_SSTHRESH);
1344 NEXT_ARG();
1345 }
1346 if (get_unsigned(&win, *argv, 0))
1347 invarg("\"ssthresh\" value is invalid\n", *argv);
1348 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1349 } else if (matches(*argv, "realms") == 0) {
1350 __u32 realm;
1351
1352 NEXT_ARG();
1353 if (get_rt_realms_or_raw(&realm, *argv))
1354 invarg("\"realm\" value is invalid\n", *argv);
1355 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1356 } else if (strcmp(*argv, "onlink") == 0) {
1357 req.r.rtm_flags |= RTNH_F_ONLINK;
1358 } else if (strcmp(*argv, "nexthop") == 0) {
1359 nhs_ok = 1;
1360 break;
1361 } else if (matches(*argv, "protocol") == 0) {
1362 __u32 prot;
1363
1364 NEXT_ARG();
1365 if (rtnl_rtprot_a2n(&prot, *argv))
1366 invarg("\"protocol\" value is invalid\n", *argv);
1367 req.r.rtm_protocol = prot;
1368 } else if (matches(*argv, "table") == 0) {
1369 __u32 tid;
1370
1371 NEXT_ARG();
1372 if (rtnl_rttable_a2n(&tid, *argv))
1373 invarg("\"table\" value is invalid\n", *argv);
1374 if (tid < 256)
1375 req.r.rtm_table = tid;
1376 else {
1377 req.r.rtm_table = RT_TABLE_UNSPEC;
1378 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1379 }
1380 table_ok = 1;
1381 } else if (matches(*argv, "vrf") == 0) {
1382 __u32 tid;
1383
1384 NEXT_ARG();
1385 tid = ipvrf_get_table(*argv);
1386 if (tid == 0)
1387 invarg("Invalid VRF\n", *argv);
1388 if (tid < 256)
1389 req.r.rtm_table = tid;
1390 else {
1391 req.r.rtm_table = RT_TABLE_UNSPEC;
1392 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1393 }
1394 table_ok = 1;
1395 } else if (strcmp(*argv, "dev") == 0 ||
1396 strcmp(*argv, "oif") == 0) {
1397 NEXT_ARG();
1398 d = *argv;
1399 } else if (matches(*argv, "pref") == 0) {
1400 __u8 pref;
1401
1402 NEXT_ARG();
1403 if (strcmp(*argv, "low") == 0)
1404 pref = ICMPV6_ROUTER_PREF_LOW;
1405 else if (strcmp(*argv, "medium") == 0)
1406 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1407 else if (strcmp(*argv, "high") == 0)
1408 pref = ICMPV6_ROUTER_PREF_HIGH;
1409 else if (get_u8(&pref, *argv, 0))
1410 invarg("\"pref\" value is invalid\n", *argv);
1411 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1412 } else if (strcmp(*argv, "encap") == 0) {
1413 char buf[1024];
1414 struct rtattr *rta = (void *)buf;
1415
1416 rta->rta_type = RTA_ENCAP;
1417 rta->rta_len = RTA_LENGTH(0);
1418
1419 lwt_parse_encap(rta, sizeof(buf), &argc, &argv);
1420
1421 if (rta->rta_len > RTA_LENGTH(0))
1422 addraw_l(&req.n, 1024
1423 , RTA_DATA(rta), RTA_PAYLOAD(rta));
1424 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1425 __u8 ttl_prop;
1426
1427 NEXT_ARG();
1428 if (matches(*argv, "enabled") == 0)
1429 ttl_prop = 1;
1430 else if (matches(*argv, "disabled") == 0)
1431 ttl_prop = 0;
1432 else
1433 invarg("\"ttl-propagate\" value is invalid\n",
1434 *argv);
1435
1436 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1437 ttl_prop);
1438 } else if (matches(*argv, "fastopen_no_cookie") == 0) {
1439 unsigned int fastopen_no_cookie;
1440
1441 NEXT_ARG();
1442 if (get_unsigned(&fastopen_no_cookie, *argv, 0))
1443 invarg("\"fastopen_no_cookie\" value is invalid\n", *argv);
1444 if (fastopen_no_cookie != 1 && fastopen_no_cookie != 0)
1445 invarg("\"fastopen_no_cookie\" value should be 0 or 1\n", *argv);
1446 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FASTOPEN_NO_COOKIE, fastopen_no_cookie);
1447 } else {
1448 int type;
1449 inet_prefix dst;
1450
1451 if (strcmp(*argv, "to") == 0) {
1452 NEXT_ARG();
1453 }
1454 if ((**argv < '0' || **argv > '9') &&
1455 rtnl_rtntype_a2n(&type, *argv) == 0) {
1456 NEXT_ARG();
1457 req.r.rtm_type = type;
1458 type_ok = 1;
1459 }
1460
1461 if (matches(*argv, "help") == 0)
1462 usage();
1463 if (dst_ok)
1464 duparg2("to", *argv);
1465 get_prefix(&dst, *argv, req.r.rtm_family);
1466 if (req.r.rtm_family == AF_UNSPEC)
1467 req.r.rtm_family = dst.family;
1468 req.r.rtm_dst_len = dst.bitlen;
1469 dst_ok = 1;
1470 if (dst.bytelen)
1471 addattr_l(&req.n, sizeof(req),
1472 RTA_DST, &dst.data, dst.bytelen);
1473 }
1474 argc--; argv++;
1475 }
1476
1477 if (!dst_ok)
1478 usage();
1479
1480 if (d) {
1481 int idx = ll_name_to_index(d);
1482
1483 if (!idx)
1484 return nodev(d);
1485 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1486 }
1487
1488 if (mxrta->rta_len > RTA_LENGTH(0)) {
1489 if (mxlock)
1490 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1491 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1492 }
1493
1494 if (nhs_ok && parse_nexthops(&req.n, &req.r, argc, argv))
1495 return -1;
1496
1497 if (req.r.rtm_family == AF_UNSPEC)
1498 req.r.rtm_family = AF_INET;
1499
1500 if (!table_ok) {
1501 if (req.r.rtm_type == RTN_LOCAL ||
1502 req.r.rtm_type == RTN_BROADCAST ||
1503 req.r.rtm_type == RTN_NAT ||
1504 req.r.rtm_type == RTN_ANYCAST)
1505 req.r.rtm_table = RT_TABLE_LOCAL;
1506 }
1507 if (!scope_ok) {
1508 if (req.r.rtm_family == AF_INET6 ||
1509 req.r.rtm_family == AF_MPLS)
1510 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1511 else if (req.r.rtm_type == RTN_LOCAL ||
1512 req.r.rtm_type == RTN_NAT)
1513 req.r.rtm_scope = RT_SCOPE_HOST;
1514 else if (req.r.rtm_type == RTN_BROADCAST ||
1515 req.r.rtm_type == RTN_MULTICAST ||
1516 req.r.rtm_type == RTN_ANYCAST)
1517 req.r.rtm_scope = RT_SCOPE_LINK;
1518 else if (req.r.rtm_type == RTN_UNICAST ||
1519 req.r.rtm_type == RTN_UNSPEC) {
1520 if (cmd == RTM_DELROUTE)
1521 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1522 else if (!gw_ok && !nhs_ok)
1523 req.r.rtm_scope = RT_SCOPE_LINK;
1524 }
1525 }
1526
1527 if (!type_ok && req.r.rtm_family == AF_MPLS)
1528 req.r.rtm_type = RTN_UNICAST;
1529
1530 if (rtnl_talk(&rth, &req.n, NULL) < 0)
1531 return -2;
1532
1533 return 0;
1534 }
1535
1536 static int iproute_flush_cache(void)
1537 {
1538 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1539
1540 int len;
1541 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1542 char *buffer = "-1";
1543
1544 if (flush_fd < 0) {
1545 fprintf(stderr, "Cannot open \"%s\": %s\n",
1546 ROUTE_FLUSH_PATH, strerror(errno));
1547 return -1;
1548 }
1549
1550 len = strlen(buffer);
1551
1552 if ((write(flush_fd, (void *)buffer, len)) < len) {
1553 fprintf(stderr, "Cannot flush routing cache\n");
1554 close(flush_fd);
1555 return -1;
1556 }
1557 close(flush_fd);
1558 return 0;
1559 }
1560
1561 static __u32 route_dump_magic = 0x45311224;
1562
1563 static int save_route(struct nlmsghdr *n, void *arg)
1564 {
1565 int ret;
1566 int len = n->nlmsg_len;
1567 struct rtmsg *r = NLMSG_DATA(n);
1568 struct rtattr *tb[RTA_MAX+1];
1569 int host_len;
1570
1571 host_len = af_bit_len(r->rtm_family);
1572 len -= NLMSG_LENGTH(sizeof(*r));
1573 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1574
1575 if (!filter_nlmsg(n, tb, host_len))
1576 return 0;
1577
1578 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1579 if ((ret > 0) && (ret != n->nlmsg_len)) {
1580 fprintf(stderr, "Short write while saving nlmsg\n");
1581 ret = -EIO;
1582 }
1583
1584 return ret == n->nlmsg_len ? 0 : ret;
1585 }
1586
1587 static int save_route_prep(void)
1588 {
1589 int ret;
1590
1591 if (isatty(STDOUT_FILENO)) {
1592 fprintf(stderr, "Not sending a binary stream to stdout\n");
1593 return -1;
1594 }
1595
1596 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1597 if (ret != sizeof(route_dump_magic)) {
1598 fprintf(stderr, "Can't write magic to dump file\n");
1599 return -1;
1600 }
1601
1602 return 0;
1603 }
1604
1605 static int iproute_flush(int family, rtnl_filter_t filter_fn)
1606 {
1607 time_t start = time(0);
1608 char flushb[4096-512];
1609 int round = 0;
1610 int ret;
1611
1612 if (filter.cloned) {
1613 if (family != AF_INET6) {
1614 iproute_flush_cache();
1615 if (show_stats)
1616 printf("*** IPv4 routing cache is flushed.\n");
1617 }
1618 if (family == AF_INET)
1619 return 0;
1620 }
1621
1622 filter.flushb = flushb;
1623 filter.flushp = 0;
1624 filter.flushe = sizeof(flushb);
1625
1626 for (;;) {
1627 if (rtnl_routedump_req(&rth, family, NULL) < 0) {
1628 perror("Cannot send dump request");
1629 return -2;
1630 }
1631 filter.flushed = 0;
1632 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1633 fprintf(stderr, "Flush terminated\n");
1634 return -2;
1635 }
1636 if (filter.flushed == 0) {
1637 if (show_stats) {
1638 if (round == 0 &&
1639 (!filter.cloned || family == AF_INET6))
1640 printf("Nothing to flush.\n");
1641 else
1642 printf("*** Flush is complete after %d round%s ***\n",
1643 round, round > 1 ? "s" : "");
1644 }
1645 fflush(stdout);
1646 return 0;
1647 }
1648 round++;
1649 ret = flush_update();
1650 if (ret < 0)
1651 return ret;
1652
1653 if (time(0) - start > 30) {
1654 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1655 (long)(time(0) - start), filter.flushed);
1656 return -1;
1657 }
1658
1659 if (show_stats) {
1660 printf("\n*** Round %d, deleting %d entries ***\n",
1661 round, filter.flushed);
1662 fflush(stdout);
1663 }
1664 }
1665 }
1666
1667 static int iproute_dump_filter(struct nlmsghdr *nlh, int reqlen)
1668 {
1669 struct rtmsg *rtm = NLMSG_DATA(nlh);
1670 int err;
1671
1672 rtm->rtm_protocol = filter.protocol;
1673 if (filter.cloned)
1674 rtm->rtm_flags |= RTM_F_CLONED;
1675
1676 if (filter.tb) {
1677 err = addattr32(nlh, reqlen, RTA_TABLE, filter.tb);
1678 if (err)
1679 return err;
1680 }
1681
1682 if (filter.oif) {
1683 err = addattr32(nlh, reqlen, RTA_OIF, filter.oif);
1684 if (err)
1685 return err;
1686 }
1687
1688 return 0;
1689 }
1690
1691 static int iproute_list_flush_or_save(int argc, char **argv, int action)
1692 {
1693 int dump_family = preferred_family;
1694 char *id = NULL;
1695 char *od = NULL;
1696 unsigned int mark = 0;
1697 rtnl_filter_t filter_fn;
1698
1699 if (action == IPROUTE_SAVE) {
1700 if (save_route_prep())
1701 return -1;
1702
1703 filter_fn = save_route;
1704 } else
1705 filter_fn = print_route;
1706
1707 iproute_reset_filter(0);
1708 filter.tb = RT_TABLE_MAIN;
1709
1710 if ((action == IPROUTE_FLUSH) && argc <= 0) {
1711 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1712 return -1;
1713 }
1714
1715 while (argc > 0) {
1716 if (matches(*argv, "table") == 0) {
1717 __u32 tid;
1718
1719 NEXT_ARG();
1720 if (rtnl_rttable_a2n(&tid, *argv)) {
1721 if (strcmp(*argv, "all") == 0) {
1722 filter.tb = 0;
1723 } else if (strcmp(*argv, "cache") == 0) {
1724 filter.cloned = 1;
1725 } else if (strcmp(*argv, "help") == 0) {
1726 usage();
1727 } else {
1728 invarg("table id value is invalid\n", *argv);
1729 }
1730 } else
1731 filter.tb = tid;
1732 } else if (matches(*argv, "vrf") == 0) {
1733 __u32 tid;
1734
1735 NEXT_ARG();
1736 tid = ipvrf_get_table(*argv);
1737 if (tid == 0)
1738 invarg("Invalid VRF\n", *argv);
1739 filter.tb = tid;
1740 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1741 } else if (matches(*argv, "cached") == 0 ||
1742 matches(*argv, "cloned") == 0) {
1743 filter.cloned = 1;
1744 } else if (strcmp(*argv, "tos") == 0 ||
1745 matches(*argv, "dsfield") == 0) {
1746 __u32 tos;
1747
1748 NEXT_ARG();
1749 if (rtnl_dsfield_a2n(&tos, *argv))
1750 invarg("TOS value is invalid\n", *argv);
1751 filter.tos = tos;
1752 filter.tosmask = -1;
1753 } else if (matches(*argv, "protocol") == 0) {
1754 __u32 prot = 0;
1755
1756 NEXT_ARG();
1757 filter.protocolmask = -1;
1758 if (rtnl_rtprot_a2n(&prot, *argv)) {
1759 if (strcmp(*argv, "all") != 0)
1760 invarg("invalid \"protocol\"\n", *argv);
1761 prot = 0;
1762 filter.protocolmask = 0;
1763 }
1764 filter.protocol = prot;
1765 } else if (matches(*argv, "scope") == 0) {
1766 __u32 scope = 0;
1767
1768 NEXT_ARG();
1769 filter.scopemask = -1;
1770 if (rtnl_rtscope_a2n(&scope, *argv)) {
1771 if (strcmp(*argv, "all") != 0)
1772 invarg("invalid \"scope\"\n", *argv);
1773 scope = RT_SCOPE_NOWHERE;
1774 filter.scopemask = 0;
1775 }
1776 filter.scope = scope;
1777 } else if (matches(*argv, "type") == 0) {
1778 int type;
1779
1780 NEXT_ARG();
1781 if (rtnl_rtntype_a2n(&type, *argv))
1782 invarg("node type value is invalid\n", *argv);
1783 filter.typemask = (1<<type);
1784 } else if (strcmp(*argv, "dev") == 0 ||
1785 strcmp(*argv, "oif") == 0) {
1786 NEXT_ARG();
1787 od = *argv;
1788 } else if (strcmp(*argv, "iif") == 0) {
1789 NEXT_ARG();
1790 id = *argv;
1791 } else if (strcmp(*argv, "mark") == 0) {
1792 NEXT_ARG();
1793 if (get_unsigned(&mark, *argv, 0))
1794 invarg("invalid mark value", *argv);
1795 filter.markmask = -1;
1796 } else if (matches(*argv, "metric") == 0 ||
1797 matches(*argv, "priority") == 0 ||
1798 strcmp(*argv, "preference") == 0) {
1799 __u32 metric;
1800
1801 NEXT_ARG();
1802 if (get_u32(&metric, *argv, 0))
1803 invarg("\"metric\" value is invalid\n", *argv);
1804 filter.metric = metric;
1805 filter.metricmask = -1;
1806 } else if (strcmp(*argv, "via") == 0) {
1807 int family;
1808
1809 NEXT_ARG();
1810 family = read_family(*argv);
1811 if (family == AF_UNSPEC)
1812 family = dump_family;
1813 else
1814 NEXT_ARG();
1815 get_prefix(&filter.rvia, *argv, family);
1816 } else if (strcmp(*argv, "src") == 0) {
1817 NEXT_ARG();
1818 get_prefix(&filter.rprefsrc, *argv, dump_family);
1819 } else if (matches(*argv, "realms") == 0) {
1820 __u32 realm;
1821
1822 NEXT_ARG();
1823 if (get_rt_realms_or_raw(&realm, *argv))
1824 invarg("invalid realms\n", *argv);
1825 filter.realm = realm;
1826 filter.realmmask = ~0U;
1827 if ((filter.realm&0xFFFF) == 0 &&
1828 (*argv)[strlen(*argv) - 1] == '/')
1829 filter.realmmask &= ~0xFFFF;
1830 if ((filter.realm&0xFFFF0000U) == 0 &&
1831 (strchr(*argv, '/') == NULL ||
1832 (*argv)[0] == '/'))
1833 filter.realmmask &= ~0xFFFF0000U;
1834 } else if (matches(*argv, "from") == 0) {
1835 NEXT_ARG();
1836 if (matches(*argv, "root") == 0) {
1837 NEXT_ARG();
1838 get_prefix(&filter.rsrc, *argv, dump_family);
1839 } else if (matches(*argv, "match") == 0) {
1840 NEXT_ARG();
1841 get_prefix(&filter.msrc, *argv, dump_family);
1842 } else {
1843 if (matches(*argv, "exact") == 0) {
1844 NEXT_ARG();
1845 }
1846 get_prefix(&filter.msrc, *argv, dump_family);
1847 filter.rsrc = filter.msrc;
1848 }
1849 } else {
1850 if (matches(*argv, "to") == 0) {
1851 NEXT_ARG();
1852 }
1853 if (matches(*argv, "root") == 0) {
1854 NEXT_ARG();
1855 get_prefix(&filter.rdst, *argv, dump_family);
1856 } else if (matches(*argv, "match") == 0) {
1857 NEXT_ARG();
1858 get_prefix(&filter.mdst, *argv, dump_family);
1859 } else {
1860 if (matches(*argv, "exact") == 0) {
1861 NEXT_ARG();
1862 }
1863 get_prefix(&filter.mdst, *argv, dump_family);
1864 filter.rdst = filter.mdst;
1865 }
1866 }
1867 argc--; argv++;
1868 }
1869
1870 if (dump_family == AF_UNSPEC && filter.tb)
1871 dump_family = AF_INET;
1872
1873 if (id || od) {
1874 int idx;
1875
1876 if (id) {
1877 idx = ll_name_to_index(id);
1878 if (!idx)
1879 return nodev(id);
1880 filter.iif = idx;
1881 filter.iifmask = -1;
1882 }
1883 if (od) {
1884 idx = ll_name_to_index(od);
1885 if (!idx)
1886 return nodev(od);
1887 filter.oif = idx;
1888 filter.oifmask = -1;
1889 }
1890 }
1891 filter.mark = mark;
1892
1893 if (action == IPROUTE_FLUSH)
1894 return iproute_flush(dump_family, filter_fn);
1895
1896 if (rtnl_routedump_req(&rth, dump_family, iproute_dump_filter) < 0) {
1897 perror("Cannot send dump request");
1898 return -2;
1899 }
1900
1901 new_json_obj(json);
1902
1903 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1904 fprintf(stderr, "Dump terminated\n");
1905 return -2;
1906 }
1907
1908 delete_json_obj();
1909 fflush(stdout);
1910 return 0;
1911 }
1912
1913
1914 static int iproute_get(int argc, char **argv)
1915 {
1916 struct {
1917 struct nlmsghdr n;
1918 struct rtmsg r;
1919 char buf[1024];
1920 } req = {
1921 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1922 .n.nlmsg_flags = NLM_F_REQUEST,
1923 .n.nlmsg_type = RTM_GETROUTE,
1924 .r.rtm_family = preferred_family,
1925 };
1926 char *idev = NULL;
1927 char *odev = NULL;
1928 struct nlmsghdr *answer;
1929 int connected = 0;
1930 int fib_match = 0;
1931 int from_ok = 0;
1932 unsigned int mark = 0;
1933 bool address_found = false;
1934
1935 iproute_reset_filter(0);
1936 filter.cloned = 2;
1937
1938 while (argc > 0) {
1939 if (strcmp(*argv, "tos") == 0 ||
1940 matches(*argv, "dsfield") == 0) {
1941 __u32 tos;
1942
1943 NEXT_ARG();
1944 if (rtnl_dsfield_a2n(&tos, *argv))
1945 invarg("TOS value is invalid\n", *argv);
1946 req.r.rtm_tos = tos;
1947 } else if (matches(*argv, "from") == 0) {
1948 inet_prefix addr;
1949
1950 NEXT_ARG();
1951 if (matches(*argv, "help") == 0)
1952 usage();
1953 from_ok = 1;
1954 get_prefix(&addr, *argv, req.r.rtm_family);
1955 if (req.r.rtm_family == AF_UNSPEC)
1956 req.r.rtm_family = addr.family;
1957 if (addr.bytelen)
1958 addattr_l(&req.n, sizeof(req), RTA_SRC,
1959 &addr.data, addr.bytelen);
1960 req.r.rtm_src_len = addr.bitlen;
1961 } else if (matches(*argv, "iif") == 0) {
1962 NEXT_ARG();
1963 idev = *argv;
1964 } else if (matches(*argv, "mark") == 0) {
1965 NEXT_ARG();
1966 if (get_unsigned(&mark, *argv, 0))
1967 invarg("invalid mark value", *argv);
1968 } else if (matches(*argv, "oif") == 0 ||
1969 strcmp(*argv, "dev") == 0) {
1970 NEXT_ARG();
1971 odev = *argv;
1972 } else if (matches(*argv, "notify") == 0) {
1973 req.r.rtm_flags |= RTM_F_NOTIFY;
1974 } else if (matches(*argv, "connected") == 0) {
1975 connected = 1;
1976 } else if (matches(*argv, "vrf") == 0) {
1977 NEXT_ARG();
1978 if (!name_is_vrf(*argv))
1979 invarg("Invalid VRF\n", *argv);
1980 odev = *argv;
1981 } else if (matches(*argv, "uid") == 0) {
1982 uid_t uid;
1983
1984 NEXT_ARG();
1985 if (get_unsigned(&uid, *argv, 0))
1986 invarg("invalid UID\n", *argv);
1987 addattr32(&req.n, sizeof(req), RTA_UID, uid);
1988 } else if (matches(*argv, "fibmatch") == 0) {
1989 fib_match = 1;
1990 } else if (strcmp(*argv, "as") == 0) {
1991 inet_prefix addr;
1992
1993 NEXT_ARG();
1994 if (strcmp(*argv, "to") == 0)
1995 NEXT_ARG();
1996 get_addr(&addr, *argv, req.r.rtm_family);
1997 if (req.r.rtm_family == AF_UNSPEC)
1998 req.r.rtm_family = addr.family;
1999 addattr_l(&req.n, sizeof(req), RTA_NEWDST,
2000 &addr.data, addr.bytelen);
2001 } else if (matches(*argv, "sport") == 0) {
2002 __be16 sport;
2003
2004 NEXT_ARG();
2005 if (get_be16(&sport, *argv, 0))
2006 invarg("invalid sport\n", *argv);
2007 addattr16(&req.n, sizeof(req), RTA_SPORT, sport);
2008 } else if (matches(*argv, "dport") == 0) {
2009 __be16 dport;
2010
2011 NEXT_ARG();
2012 if (get_be16(&dport, *argv, 0))
2013 invarg("invalid dport\n", *argv);
2014 addattr16(&req.n, sizeof(req), RTA_DPORT, dport);
2015 } else if (matches(*argv, "ipproto") == 0) {
2016 int ipproto;
2017
2018 NEXT_ARG();
2019 ipproto = inet_proto_a2n(*argv);
2020 if (ipproto < 0)
2021 invarg("Invalid \"ipproto\" value\n",
2022 *argv);
2023 addattr8(&req.n, sizeof(req), RTA_IP_PROTO, ipproto);
2024 } else {
2025 inet_prefix addr;
2026
2027 if (strcmp(*argv, "to") == 0) {
2028 NEXT_ARG();
2029 }
2030 if (matches(*argv, "help") == 0)
2031 usage();
2032 get_prefix(&addr, *argv, req.r.rtm_family);
2033 if (req.r.rtm_family == AF_UNSPEC)
2034 req.r.rtm_family = addr.family;
2035 if (addr.bytelen)
2036 addattr_l(&req.n, sizeof(req),
2037 RTA_DST, &addr.data, addr.bytelen);
2038 req.r.rtm_dst_len = addr.bitlen;
2039 address_found = true;
2040 }
2041 argc--; argv++;
2042 }
2043
2044 if (!address_found) {
2045 fprintf(stderr, "need at least a destination address\n");
2046 return -1;
2047 }
2048
2049 if (idev || odev) {
2050 int idx;
2051
2052 if (idev) {
2053 idx = ll_name_to_index(idev);
2054 if (!idx)
2055 return nodev(idev);
2056 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
2057 }
2058 if (odev) {
2059 idx = ll_name_to_index(odev);
2060 if (!idx)
2061 return nodev(odev);
2062 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
2063 }
2064 }
2065 if (mark)
2066 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
2067
2068 if (req.r.rtm_family == AF_UNSPEC)
2069 req.r.rtm_family = AF_INET;
2070
2071 /* Only IPv4 supports the RTM_F_LOOKUP_TABLE flag */
2072 if (req.r.rtm_family == AF_INET)
2073 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
2074 if (fib_match)
2075 req.r.rtm_flags |= RTM_F_FIB_MATCH;
2076
2077 if (rtnl_talk(&rth, &req.n, &answer) < 0)
2078 return -2;
2079
2080 new_json_obj(json);
2081
2082 if (connected && !from_ok) {
2083 struct rtmsg *r = NLMSG_DATA(answer);
2084 int len = answer->nlmsg_len;
2085 struct rtattr *tb[RTA_MAX+1];
2086
2087 if (print_route(answer, (void *)stdout) < 0) {
2088 fprintf(stderr, "An error :-)\n");
2089 free(answer);
2090 return -1;
2091 }
2092
2093 if (answer->nlmsg_type != RTM_NEWROUTE) {
2094 fprintf(stderr, "Not a route?\n");
2095 free(answer);
2096 return -1;
2097 }
2098 len -= NLMSG_LENGTH(sizeof(*r));
2099 if (len < 0) {
2100 fprintf(stderr, "Wrong len %d\n", len);
2101 free(answer);
2102 return -1;
2103 }
2104
2105 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2106
2107 if (tb[RTA_PREFSRC]) {
2108 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
2109 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
2110 } else if (!tb[RTA_SRC]) {
2111 fprintf(stderr, "Failed to connect the route\n");
2112 free(answer);
2113 return -1;
2114 }
2115 if (!odev && tb[RTA_OIF])
2116 tb[RTA_OIF]->rta_type = 0;
2117 if (tb[RTA_GATEWAY])
2118 tb[RTA_GATEWAY]->rta_type = 0;
2119 if (tb[RTA_VIA])
2120 tb[RTA_VIA]->rta_type = 0;
2121 if (!idev && tb[RTA_IIF])
2122 tb[RTA_IIF]->rta_type = 0;
2123 req.n.nlmsg_flags = NLM_F_REQUEST;
2124 req.n.nlmsg_type = RTM_GETROUTE;
2125
2126 delete_json_obj();
2127 free(answer);
2128 if (rtnl_talk(&rth, &req.n, &answer) < 0)
2129 return -2;
2130 }
2131
2132 if (print_route(answer, (void *)stdout) < 0) {
2133 fprintf(stderr, "An error :-)\n");
2134 free(answer);
2135 return -1;
2136 }
2137
2138 delete_json_obj();
2139 free(answer);
2140 return 0;
2141 }
2142
2143 static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
2144 {
2145 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
2146 return 1;
2147
2148 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
2149 }
2150
2151 static int restore_handler(struct rtnl_ctrl_data *ctrl,
2152 struct nlmsghdr *n, void *arg)
2153 {
2154 struct rtmsg *r = NLMSG_DATA(n);
2155 struct rtattr *tb[RTA_MAX+1];
2156 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
2157 int ret, prio = *(int *)arg;
2158
2159 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2160
2161 /* Restore routes in correct order:
2162 * 0. ones for local addresses,
2163 * 1. ones for local networks,
2164 * 2. others (remote networks/hosts).
2165 */
2166 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
2167 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
2168 goto restore;
2169 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
2170 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
2171 goto restore;
2172 else if (prio == 2 && tb[RTA_GATEWAY])
2173 goto restore;
2174
2175 return 0;
2176
2177 restore:
2178 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
2179
2180 ll_init_map(&rth);
2181
2182 ret = rtnl_talk(&rth, n, NULL);
2183 if ((ret < 0) && (errno == EEXIST))
2184 ret = 0;
2185
2186 return ret;
2187 }
2188
2189 static int route_dump_check_magic(void)
2190 {
2191 int ret;
2192 __u32 magic = 0;
2193
2194 if (isatty(STDIN_FILENO)) {
2195 fprintf(stderr, "Can't restore route dump from a terminal\n");
2196 return -1;
2197 }
2198
2199 ret = fread(&magic, sizeof(magic), 1, stdin);
2200 if (magic != route_dump_magic) {
2201 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
2202 return -1;
2203 }
2204
2205 return 0;
2206 }
2207
2208 static int iproute_restore(void)
2209 {
2210 int pos, prio;
2211
2212 if (route_dump_check_magic())
2213 return -1;
2214
2215 pos = ftell(stdin);
2216 if (pos == -1) {
2217 perror("Failed to restore: ftell");
2218 return -1;
2219 }
2220
2221 for (prio = 0; prio < 3; prio++) {
2222 int err;
2223
2224 err = rtnl_from_file(stdin, &restore_handler, &prio);
2225 if (err)
2226 return -2;
2227
2228 if (fseek(stdin, pos, SEEK_SET) == -1) {
2229 perror("Failed to restore: fseek");
2230 return -1;
2231 }
2232 }
2233
2234 return 0;
2235 }
2236
2237 static int show_handler(struct rtnl_ctrl_data *ctrl,
2238 struct nlmsghdr *n, void *arg)
2239 {
2240 print_route(n, stdout);
2241 return 0;
2242 }
2243
2244 static int iproute_showdump(void)
2245 {
2246 if (route_dump_check_magic())
2247 return -1;
2248
2249 if (rtnl_from_file(stdin, &show_handler, NULL))
2250 return -2;
2251
2252 return 0;
2253 }
2254
2255 void iproute_reset_filter(int ifindex)
2256 {
2257 memset(&filter, 0, sizeof(filter));
2258 filter.mdst.bitlen = -1;
2259 filter.msrc.bitlen = -1;
2260 filter.oif = ifindex;
2261 if (filter.oif > 0)
2262 filter.oifmask = -1;
2263 }
2264
2265 int do_iproute(int argc, char **argv)
2266 {
2267 if (argc < 1)
2268 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
2269
2270 if (matches(*argv, "add") == 0)
2271 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
2272 argc-1, argv+1);
2273 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
2274 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
2275 argc-1, argv+1);
2276 if (matches(*argv, "replace") == 0)
2277 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
2278 argc-1, argv+1);
2279 if (matches(*argv, "prepend") == 0)
2280 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
2281 argc-1, argv+1);
2282 if (matches(*argv, "append") == 0)
2283 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
2284 argc-1, argv+1);
2285 if (matches(*argv, "test") == 0)
2286 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
2287 argc-1, argv+1);
2288 if (matches(*argv, "delete") == 0)
2289 return iproute_modify(RTM_DELROUTE, 0,
2290 argc-1, argv+1);
2291 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2292 || matches(*argv, "lst") == 0)
2293 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
2294 if (matches(*argv, "get") == 0)
2295 return iproute_get(argc-1, argv+1);
2296 if (matches(*argv, "flush") == 0)
2297 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2298 if (matches(*argv, "save") == 0)
2299 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2300 if (matches(*argv, "restore") == 0)
2301 return iproute_restore();
2302 if (matches(*argv, "showdump") == 0)
2303 return iproute_showdump();
2304 if (matches(*argv, "help") == 0)
2305 usage();
2306
2307 fprintf(stderr,
2308 "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
2309 exit(-1);
2310 }
Upstream mirror of iproute2