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