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