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8#include <stdio.h>
9#include <stdlib.h>
10#include <unistd.h>
11#include <fcntl.h>
12#include <string.h>
13#include <time.h>
14#include <sys/time.h>
15#include <sys/socket.h>
16#include <netinet/in.h>
17#include <netinet/ip.h>
18#include <arpa/inet.h>
19#include <linux/in_route.h>
20#include <linux/icmpv6.h>
21#include <errno.h>
22
23#include "rt_names.h"
24#include "utils.h"
25#include "ip_common.h"
26#include "nh_common.h"
27
28#ifndef RTAX_RTTVAR
29#define RTAX_RTTVAR RTAX_HOPS
30#endif
31
32enum list_action {
33 IPROUTE_LIST,
34 IPROUTE_FLUSH,
35 IPROUTE_SAVE,
36};
37static const char *mx_names[RTAX_MAX+1] = {
38 [RTAX_MTU] = "mtu",
39 [RTAX_WINDOW] = "window",
40 [RTAX_RTT] = "rtt",
41 [RTAX_RTTVAR] = "rttvar",
42 [RTAX_SSTHRESH] = "ssthresh",
43 [RTAX_CWND] = "cwnd",
44 [RTAX_ADVMSS] = "advmss",
45 [RTAX_REORDERING] = "reordering",
46 [RTAX_HOPLIMIT] = "hoplimit",
47 [RTAX_INITCWND] = "initcwnd",
48 [RTAX_FEATURES] = "features",
49 [RTAX_RTO_MIN] = "rto_min",
50 [RTAX_INITRWND] = "initrwnd",
51 [RTAX_QUICKACK] = "quickack",
52 [RTAX_CC_ALGO] = "congctl",
53 [RTAX_FASTOPEN_NO_COOKIE] = "fastopen_no_cookie"
54};
55static void usage(void) __attribute__((noreturn));
56
57static void usage(void)
58{
59 fprintf(stderr,
60 "Usage: ip route { list | flush } SELECTOR\n"
61 " ip route save SELECTOR\n"
62 " ip route restore\n"
63 " ip route showdump\n"
64 " ip route get [ ROUTE_GET_FLAGS ] [ to ] ADDRESS\n"
65 " [ from ADDRESS iif STRING ]\n"
66 " [ oif STRING ] [ tos TOS ]\n"
67 " [ mark NUMBER ] [ vrf NAME ]\n"
68 " [ uid NUMBER ] [ ipproto PROTOCOL ]\n"
69 " [ sport NUMBER ] [ dport NUMBER ]\n"
70 " [ as ADDRESS ] [ flowlabel FLOWLABEL ]\n"
71 " ip route { add | del | change | append | replace } ROUTE\n"
72 "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"
73 " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n"
74 " [ type TYPE ] [ scope SCOPE ]\n"
75 "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"
76 "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"
77 " [ table TABLE_ID ] [ proto RTPROTO ]\n"
78 " [ scope SCOPE ] [ metric METRIC ]\n"
79 " [ ttl-propagate { enabled | disabled } ]\n"
80 "INFO_SPEC := { NH | nhid ID } OPTIONS FLAGS [ nexthop NH ]...\n"
81 "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n"
82 " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"
83 "FAMILY := [ inet | inet6 | mpls | bridge | link ]\n"
84 "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n"
85 " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n"
86 " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"
87 " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"
88 " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n"
89 " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n"
90 " [ pref PREF ] [ expires TIME ] [ fastopen_no_cookie BOOL ]\n"
91 "TYPE := { unicast | local | broadcast | multicast | throw |\n"
92 " unreachable | prohibit | blackhole | nat }\n"
93 "TABLE_ID := [ local | main | default | all | NUMBER ]\n"
94 "SCOPE := [ host | link | global | NUMBER ]\n"
95 "NHFLAGS := [ onlink | pervasive ]\n"
96 "RTPROTO := [ kernel | boot | static | NUMBER ]\n"
97 "PREF := [ low | medium | high ]\n"
98 "TIME := NUMBER[s|ms]\n"
99 "BOOL := [1|0]\n"
100 "FEATURES := ecn\n"
101 "ENCAPTYPE := [ mpls | ip | ip6 | seg6 | seg6local | rpl | ioam6 | xfrm ]\n"
102 "ENCAPHDR := [ MPLSLABEL | SEG6HDR | SEG6LOCAL | IOAM6HDR | XFRMINFO ]\n"
103 "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n"
104 "SEGMODE := [ encap | encap.red | inline | l2encap | l2encap.red ]\n"
105 "SEG6LOCAL := action ACTION [ OPTIONS ] [ count ]\n"
106 "ACTION := { End | End.X | End.T | End.DX2 | End.DX6 | End.DX4 |\n"
107 " End.DT6 | End.DT4 | End.DT46 | End.B6 | End.B6.Encaps |\n"
108 " End.BM | End.S | End.AS | End.AM | End.BPF }\n"
109 "OPTIONS := OPTION [ OPTIONS ]\n"
110 "OPTION := { flavors FLAVORS | srh SEG6HDR | nh4 ADDR | nh6 ADDR | iif DEV | oif DEV |\n"
111 " table TABLEID | vrftable TABLEID | endpoint PROGNAME }\n"
112 "FLAVORS := { FLAVOR[,FLAVOR] }\n"
113 "FLAVOR := { psp | usp | usd | next-csid }\n"
114 "IOAM6HDR := trace prealloc type IOAM6_TRACE_TYPE ns IOAM6_NAMESPACE size IOAM6_TRACE_SIZE\n"
115 "XFRMINFO := if_id IF_ID [ link_dev LINK ]\n"
116 "ROUTE_GET_FLAGS := ROUTE_GET_FLAG [ ROUTE_GET_FLAGS ]\n"
117 "ROUTE_GET_FLAG := [ connected | fibmatch | notify ]\n");
118 exit(-1);
119}
120
121
122static struct
123{
124 unsigned int tb;
125 int cloned;
126 int flushed;
127 char *flushb;
128 int flushp;
129 int flushe;
130 int protocol, protocolmask;
131 int scope, scopemask;
132 __u64 typemask;
133 int tos, tosmask;
134 int iif, iifmask;
135 int oif, oifmask;
136 int mark, markmask;
137 int realm, realmmask;
138 __u32 metric, metricmask;
139 inet_prefix rprefsrc;
140 inet_prefix rvia;
141 inet_prefix rdst;
142 inet_prefix mdst;
143 inet_prefix rsrc;
144 inet_prefix msrc;
145} filter;
146
147static int flush_update(void)
148{
149 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
150 perror("Failed to send flush request");
151 return -2;
152 }
153 filter.flushp = 0;
154 return 0;
155}
156
157static bool filter_multipath(const struct rtattr *rta)
158{
159 const struct rtnexthop *nh = RTA_DATA(rta);
160 int len = RTA_PAYLOAD(rta);
161
162 while (len >= sizeof(*nh)) {
163 if (nh->rtnh_len > len)
164 break;
165
166 if (!((nh->rtnh_ifindex ^ filter.oif) & filter.oifmask))
167 return true;
168
169 len -= NLMSG_ALIGN(nh->rtnh_len);
170 nh = RTNH_NEXT(nh);
171 }
172 return false;
173}
174
175static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
176{
177 struct rtmsg *r = NLMSG_DATA(n);
178 inet_prefix dst = { .family = r->rtm_family };
179 inet_prefix src = { .family = r->rtm_family };
180 inet_prefix via = { .family = r->rtm_family };
181 inet_prefix prefsrc = { .family = r->rtm_family };
182 __u32 table;
183 static int ip6_multiple_tables;
184
185 table = rtm_get_table(r, tb);
186
187 if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
188 return 0;
189
190 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
191 ip6_multiple_tables = 1;
192
193 if (filter.cloned == !(r->rtm_flags & RTM_F_CLONED))
194 return 0;
195
196 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
197 if (filter.tb) {
198 if (filter.tb == RT_TABLE_LOCAL) {
199 if (r->rtm_type != RTN_LOCAL)
200 return 0;
201 } else if (filter.tb == RT_TABLE_MAIN) {
202 if (r->rtm_type == RTN_LOCAL)
203 return 0;
204 } else {
205 return 0;
206 }
207 }
208 } else {
209 if (filter.tb > 0 && filter.tb != table)
210 return 0;
211 }
212 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
213 return 0;
214 if ((filter.scope^r->rtm_scope)&filter.scopemask)
215 return 0;
216
217 if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
218 return 0;
219 if ((filter.tos^r->rtm_tos)&filter.tosmask)
220 return 0;
221 if (filter.rdst.family) {
222 if (r->rtm_family != filter.rdst.family ||
223 filter.rdst.bitlen > r->rtm_dst_len)
224 return 0;
225 } else if (filter.rdst.flags & PREFIXLEN_SPECIFIED) {
226 if (filter.rdst.bitlen > r->rtm_dst_len)
227 return 0;
228 }
229 if (filter.mdst.family) {
230 if (r->rtm_family != filter.mdst.family ||
231 (filter.mdst.bitlen >= 0 &&
232 filter.mdst.bitlen < r->rtm_dst_len))
233 return 0;
234 } else if (filter.mdst.flags & PREFIXLEN_SPECIFIED) {
235 if (filter.mdst.bitlen >= 0 &&
236 filter.mdst.bitlen < r->rtm_dst_len)
237 return 0;
238 }
239 if (filter.rsrc.family) {
240 if (r->rtm_family != filter.rsrc.family ||
241 filter.rsrc.bitlen > r->rtm_src_len)
242 return 0;
243 } else if (filter.rsrc.flags & PREFIXLEN_SPECIFIED) {
244 if (filter.rsrc.bitlen > r->rtm_src_len)
245 return 0;
246 }
247 if (filter.msrc.family) {
248 if (r->rtm_family != filter.msrc.family ||
249 (filter.msrc.bitlen >= 0 &&
250 filter.msrc.bitlen < r->rtm_src_len))
251 return 0;
252 } else if (filter.msrc.flags & PREFIXLEN_SPECIFIED) {
253 if (filter.msrc.bitlen >= 0 &&
254 filter.msrc.bitlen < r->rtm_src_len)
255 return 0;
256 }
257 if (filter.rvia.family) {
258 int family = r->rtm_family;
259
260 if (tb[RTA_VIA]) {
261 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
262
263 family = via->rtvia_family;
264 }
265 if (family != filter.rvia.family)
266 return 0;
267 }
268 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
269 return 0;
270
271 if (tb[RTA_DST])
272 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
273 if (filter.rsrc.family || filter.msrc.family ||
274 filter.rsrc.flags & PREFIXLEN_SPECIFIED ||
275 filter.msrc.flags & PREFIXLEN_SPECIFIED) {
276 if (tb[RTA_SRC])
277 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
278 }
279 if (filter.rvia.bitlen > 0) {
280 if (tb[RTA_GATEWAY])
281 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
282 if (tb[RTA_VIA]) {
283 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
284 struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
285
286 via.family = rtvia->rtvia_family;
287 memcpy(&via.data, rtvia->rtvia_addr, len);
288 }
289 }
290 if (filter.rprefsrc.bitlen > 0) {
291 if (tb[RTA_PREFSRC])
292 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
293 }
294
295 if ((filter.rdst.family || filter.rdst.flags & PREFIXLEN_SPECIFIED) &&
296 inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
297 return 0;
298 if ((filter.mdst.family || filter.mdst.flags & PREFIXLEN_SPECIFIED) &&
299 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
300 return 0;
301
302 if ((filter.rsrc.family || filter.rsrc.flags & PREFIXLEN_SPECIFIED) &&
303 inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
304 return 0;
305 if ((filter.msrc.family || filter.msrc.flags & PREFIXLEN_SPECIFIED) &&
306 filter.msrc.bitlen >= 0 &&
307 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
308 return 0;
309
310 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
311 return 0;
312 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
313 return 0;
314 if (filter.realmmask) {
315 __u32 realms = 0;
316
317 if (tb[RTA_FLOW])
318 realms = rta_getattr_u32(tb[RTA_FLOW]);
319 if ((realms^filter.realm)&filter.realmmask)
320 return 0;
321 }
322 if (filter.iifmask) {
323 int iif = 0;
324
325 if (tb[RTA_IIF])
326 iif = rta_getattr_u32(tb[RTA_IIF]);
327 if ((iif^filter.iif)&filter.iifmask)
328 return 0;
329 }
330 if (filter.oifmask) {
331 if (tb[RTA_OIF]) {
332 int oif = rta_getattr_u32(tb[RTA_OIF]);
333
334 if ((oif ^ filter.oif) & filter.oifmask)
335 return 0;
336 } else if (tb[RTA_MULTIPATH]) {
337 if (!filter_multipath(tb[RTA_MULTIPATH]))
338 return 0;
339 }
340 }
341 if (filter.markmask) {
342 int mark = 0;
343
344 if (tb[RTA_MARK])
345 mark = rta_getattr_u32(tb[RTA_MARK]);
346 if ((mark ^ filter.mark) & filter.markmask)
347 return 0;
348 }
349 if (filter.metricmask) {
350 __u32 metric = 0;
351
352 if (tb[RTA_PRIORITY])
353 metric = rta_getattr_u32(tb[RTA_PRIORITY]);
354 if ((metric ^ filter.metric) & filter.metricmask)
355 return 0;
356 }
357 if (filter.flushb &&
358 r->rtm_family == AF_INET6 &&
359 r->rtm_dst_len == 0 &&
360 r->rtm_type == RTN_UNREACHABLE &&
361 tb[RTA_PRIORITY] &&
362 rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
363 return 0;
364
365 return 1;
366}
367
368static void print_rtax_features(FILE *fp, unsigned int features)
369{
370 unsigned int of = features;
371
372 if (features & RTAX_FEATURE_ECN) {
373 print_null(PRINT_ANY, "ecn", "ecn ", NULL);
374 features &= ~RTAX_FEATURE_ECN;
375 }
376
377 if (features & RTAX_FEATURE_TCP_USEC_TS) {
378 print_null(PRINT_ANY, "tcp_usec_ts", "tcp_usec_ts ", NULL);
379 features &= ~RTAX_FEATURE_TCP_USEC_TS;
380 }
381
382 if (features)
383 print_0xhex(PRINT_ANY,
384 "features", "%#llx ", of);
385}
386
387void print_rt_flags(FILE *fp, unsigned int flags)
388{
389 open_json_array(PRINT_JSON,
390 is_json_context() ? "flags" : "");
391
392 if (flags & RTNH_F_DEAD)
393 print_string(PRINT_ANY, NULL, "%s ", "dead");
394 if (flags & RTNH_F_ONLINK)
395 print_string(PRINT_ANY, NULL, "%s ", "onlink");
396 if (flags & RTNH_F_PERVASIVE)
397 print_string(PRINT_ANY, NULL, "%s ", "pervasive");
398 if (flags & RTNH_F_OFFLOAD)
399 print_string(PRINT_ANY, NULL, "%s ", "offload");
400 if (flags & RTNH_F_TRAP)
401 print_string(PRINT_ANY, NULL, "%s ", "trap");
402 if (flags & RTM_F_NOTIFY)
403 print_string(PRINT_ANY, NULL, "%s ", "notify");
404 if (flags & RTNH_F_LINKDOWN)
405 print_string(PRINT_ANY, NULL, "%s ", "linkdown");
406 if (flags & RTNH_F_UNRESOLVED)
407 print_string(PRINT_ANY, NULL, "%s ", "unresolved");
408 if (flags & RTM_F_OFFLOAD)
409 print_string(PRINT_ANY, NULL, "%s ", "rt_offload");
410 if (flags & RTM_F_TRAP)
411 print_string(PRINT_ANY, NULL, "%s ", "rt_trap");
412 if (flags & RTM_F_OFFLOAD_FAILED)
413 print_string(PRINT_ANY, NULL, "%s ", "rt_offload_failed");
414
415 close_json_array(PRINT_JSON, NULL);
416}
417
418static void print_rt_pref(FILE *fp, unsigned int pref)
419{
420
421 switch (pref) {
422 case ICMPV6_ROUTER_PREF_LOW:
423 print_string(PRINT_ANY,
424 "pref", "pref %s", "low");
425 break;
426 case ICMPV6_ROUTER_PREF_MEDIUM:
427 print_string(PRINT_ANY,
428 "pref", "pref %s", "medium");
429 break;
430 case ICMPV6_ROUTER_PREF_HIGH:
431 print_string(PRINT_ANY,
432 "pref", "pref %s", "high");
433 break;
434 default:
435 print_uint(PRINT_ANY,
436 "pref", "%u", pref);
437 }
438}
439
440void print_rta_ifidx(FILE *fp, __u32 ifidx, const char *prefix)
441{
442 const char *ifname = ll_index_to_name(ifidx);
443
444 if (is_json_context()) {
445 print_string(PRINT_JSON, prefix, NULL, ifname);
446 } else {
447 fprintf(fp, "%s ", prefix);
448 color_fprintf(fp, COLOR_IFNAME, "%s ", ifname);
449 }
450}
451
452static void print_cache_flags(FILE *fp, __u32 flags)
453{
454 json_writer_t *jw = get_json_writer();
455 flags &= ~0xFFFF;
456
457 if (jw) {
458 jsonw_name(jw, "cache");
459 jsonw_start_array(jw);
460 } else {
461 fprintf(fp, "%s cache ", _SL_);
462 if (flags == 0)
463 return;
464 putc('<', fp);
465 }
466
467#define PRTFL(fl, flname) \
468 if (flags & RTCF_##fl) { \
469 flags &= ~RTCF_##fl; \
470 if (jw) \
471 jsonw_string(jw, flname); \
472 else \
473 fprintf(fp, "%s%s", flname, flags ? "," : "> "); \
474 }
475
476 PRTFL(LOCAL, "local");
477 PRTFL(REJECT, "reject");
478 PRTFL(MULTICAST, "mc");
479 PRTFL(BROADCAST, "brd");
480 PRTFL(DNAT, "dst-nat");
481 PRTFL(SNAT, "src-nat");
482 PRTFL(MASQ, "masq");
483 PRTFL(DIRECTDST, "dst-direct");
484 PRTFL(DIRECTSRC, "src-direct");
485 PRTFL(REDIRECTED, "redirected");
486 PRTFL(DOREDIRECT, "redirect");
487 PRTFL(FAST, "fastroute");
488 PRTFL(NOTIFY, "notify");
489 PRTFL(TPROXY, "proxy");
490#undef PRTFL
491
492 if (flags)
493 print_hex(PRINT_ANY, "flags", "%x>", flags);
494
495 if (jw)
496 jsonw_end_array(jw);
497}
498
499static void print_rta_cacheinfo(FILE *fp, const struct rta_cacheinfo *ci)
500{
501 static int hz;
502
503 if (!hz)
504 hz = get_user_hz();
505
506 if (ci->rta_expires != 0)
507 print_int(PRINT_ANY, "expires",
508 "expires %dsec ", ci->rta_expires/hz);
509 if (ci->rta_error != 0)
510 print_uint(PRINT_ANY, "error",
511 "error %u ", ci->rta_error);
512
513 if (show_stats) {
514 if (ci->rta_clntref)
515 print_uint(PRINT_ANY, "users",
516 "users %u ", ci->rta_clntref);
517 if (ci->rta_used != 0)
518 print_uint(PRINT_ANY, "used",
519 "used %u ", ci->rta_used);
520 if (ci->rta_lastuse != 0)
521 print_uint(PRINT_ANY, "age",
522 "age %usec ", ci->rta_lastuse/hz);
523 }
524 if (ci->rta_id)
525 print_0xhex(PRINT_ANY, "ipid",
526 "ipid 0x%04llx ", ci->rta_id);
527 if (ci->rta_ts || ci->rta_tsage) {
528 print_0xhex(PRINT_ANY, "ts",
529 "ts 0x%llx", ci->rta_ts);
530 print_uint(PRINT_ANY, "tsage",
531 "tsage %usec ", ci->rta_tsage);
532 }
533}
534
535static void print_rta_flow(FILE *fp, const struct rtattr *rta)
536{
537 __u32 to = rta_getattr_u32(rta);
538 __u32 from = to >> 16;
539 SPRINT_BUF(b1);
540
541 to &= 0xFFFF;
542 if (is_json_context()) {
543 open_json_object("flow");
544
545 if (from)
546 print_string(PRINT_JSON, "from", NULL,
547 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
548 print_string(PRINT_JSON, "to", NULL,
549 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
550 close_json_object();
551 } else {
552 fprintf(fp, "realm%s ", from ? "s" : "");
553
554 if (from)
555 print_string(PRINT_FP, NULL, "%s/",
556 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
557 print_string(PRINT_FP, NULL, "%s ",
558 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
559 }
560}
561
562static void print_rta_newdst(FILE *fp, const struct rtmsg *r,
563 const struct rtattr *rta)
564{
565 const char *newdst = format_host_rta(r->rtm_family, rta);
566
567 if (is_json_context())
568 print_string(PRINT_JSON, "to", NULL, newdst);
569 else {
570 fprintf(fp, "as to ");
571 print_color_string(PRINT_FP,
572 ifa_family_color(r->rtm_family),
573 NULL, "%s ", newdst);
574 }
575}
576
577void __print_rta_gateway(FILE *fp, unsigned char family, const char *gateway)
578{
579 if (is_json_context()) {
580 print_string(PRINT_JSON, "gateway", NULL, gateway);
581 } else {
582 fprintf(fp, "via ");
583 print_color_string(PRINT_FP,
584 ifa_family_color(family),
585 NULL, "%s ", gateway);
586 }
587}
588
589static void print_rta_gateway(FILE *fp, unsigned char family, const struct rtattr *rta)
590{
591 const char *gateway = format_host_rta(family, rta);
592
593 __print_rta_gateway(fp, family, gateway);
594}
595
596static void print_rta_via(FILE *fp, const struct rtattr *rta)
597{
598 size_t len = RTA_PAYLOAD(rta) - 2;
599 const struct rtvia *via = RTA_DATA(rta);
600
601 if (is_json_context()) {
602 open_json_object("via");
603 print_string(PRINT_JSON, "family", NULL,
604 family_name(via->rtvia_family));
605 print_string(PRINT_JSON, "host", NULL,
606 format_host(via->rtvia_family, len,
607 via->rtvia_addr));
608 close_json_object();
609 } else {
610 print_string(PRINT_FP, NULL, "via %s ",
611 family_name(via->rtvia_family));
612 print_color_string(PRINT_FP,
613 ifa_family_color(via->rtvia_family),
614 NULL, "%s ",
615 format_host(via->rtvia_family,
616 len, via->rtvia_addr));
617 }
618}
619
620static void print_rta_metrics(FILE *fp, const struct rtattr *rta)
621{
622 struct rtattr *mxrta[RTAX_MAX+1];
623 unsigned int mxlock = 0;
624 int i;
625
626 open_json_array(PRINT_JSON, "metrics");
627 open_json_object(NULL);
628
629 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta));
630
631 if (mxrta[RTAX_LOCK])
632 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
633
634 for (i = 2; i <= RTAX_MAX; i++) {
635 __u32 val = 0U;
636
637 if (mxrta[i] == NULL && !(mxlock & (1 << i)))
638 continue;
639
640 if (mxrta[i] != NULL && i != RTAX_CC_ALGO)
641 val = rta_getattr_u32(mxrta[i]);
642
643 if (i == RTAX_HOPLIMIT && (int)val == -1)
644 continue;
645
646 if (!is_json_context()) {
647 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
648 fprintf(fp, "%s ", mx_names[i]);
649 else
650 fprintf(fp, "metric %d ", i);
651
652 if (mxlock & (1<<i))
653 fprintf(fp, "lock ");
654 }
655
656 switch (i) {
657 case RTAX_FEATURES:
658 print_rtax_features(fp, val);
659 break;
660 default:
661 print_uint(PRINT_ANY, mx_names[i], "%u ", val);
662 break;
663
664 case RTAX_RTT:
665 case RTAX_RTTVAR:
666 case RTAX_RTO_MIN:
667 if (i == RTAX_RTT)
668 val /= 8;
669 else if (i == RTAX_RTTVAR)
670 val /= 4;
671
672 if (is_json_context())
673 print_uint(PRINT_JSON, mx_names[i],
674 NULL, val);
675 else {
676 if (val >= 1000)
677 fprintf(fp, "%gs ", val/1e3);
678 else
679 fprintf(fp, "%ums ", val);
680 }
681 break;
682 case RTAX_CC_ALGO:
683 print_string(PRINT_ANY, "congestion",
684 "%s ", rta_getattr_str(mxrta[i]));
685 break;
686 }
687 }
688
689 close_json_object();
690 close_json_array(PRINT_JSON, NULL);
691}
692
693static void print_rta_multipath(FILE *fp, const struct rtmsg *r,
694 struct rtattr *rta)
695{
696 const struct rtnexthop *nh = RTA_DATA(rta);
697 int len = RTA_PAYLOAD(rta);
698 int first = 1;
699
700 open_json_array(PRINT_JSON, "nexthops");
701
702 while (len >= sizeof(*nh)) {
703 struct rtattr *tb[RTA_MAX + 1];
704
705 if (nh->rtnh_len > len)
706 break;
707
708 open_json_object(NULL);
709
710 if ((r->rtm_flags & RTM_F_CLONED) &&
711 r->rtm_type == RTN_MULTICAST) {
712 if (first) {
713 print_string(PRINT_FP, NULL, "Oifs: ", NULL);
714 first = 0;
715 } else {
716 print_string(PRINT_FP, NULL, " ", NULL);
717 }
718 } else
719 print_string(PRINT_FP, NULL, "%s\tnexthop ", _SL_);
720
721 if (nh->rtnh_len > sizeof(*nh)) {
722 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh),
723 nh->rtnh_len - sizeof(*nh));
724
725 if (tb[RTA_ENCAP])
726 lwt_print_encap(fp,
727 tb[RTA_ENCAP_TYPE],
728 tb[RTA_ENCAP]);
729 if (tb[RTA_NEWDST])
730 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
731 if (tb[RTA_GATEWAY])
732 print_rta_gateway(fp, r->rtm_family,
733 tb[RTA_GATEWAY]);
734 if (tb[RTA_VIA])
735 print_rta_via(fp, tb[RTA_VIA]);
736 if (tb[RTA_FLOW])
737 print_rta_flow(fp, tb[RTA_FLOW]);
738 }
739
740 if ((r->rtm_flags & RTM_F_CLONED) &&
741 r->rtm_type == RTN_MULTICAST) {
742 print_string(PRINT_ANY, "dev",
743 "%s", ll_index_to_name(nh->rtnh_ifindex));
744
745 if (nh->rtnh_hops != 1)
746 print_int(PRINT_ANY, "ttl", "(ttl>%d)", nh->rtnh_hops);
747
748 print_string(PRINT_FP, NULL, " ", NULL);
749 } else {
750 print_string(PRINT_ANY, "dev",
751 "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
752
753 if (r->rtm_family != AF_MPLS)
754 print_int(PRINT_ANY, "weight",
755 "weight %d ", nh->rtnh_hops + 1);
756 }
757
758 print_rt_flags(fp, nh->rtnh_flags);
759
760 len -= NLMSG_ALIGN(nh->rtnh_len);
761 nh = RTNH_NEXT(nh);
762
763 close_json_object();
764 }
765 close_json_array(PRINT_JSON, NULL);
766}
767
768int print_route(struct nlmsghdr *n, void *arg)
769{
770 FILE *fp = (FILE *)arg;
771 struct rtmsg *r = NLMSG_DATA(n);
772 int len = n->nlmsg_len;
773 struct rtattr *tb[RTA_MAX+1];
774 int family, color, host_len;
775 __u32 table;
776 int ret;
777
778 SPRINT_BUF(b1);
779 SPRINT_BUF(b2);
780
781 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
782 fprintf(stderr, "Not a route: %08x %08x %08x\n",
783 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
784 return -1;
785 }
786 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
787 return 0;
788 len -= NLMSG_LENGTH(sizeof(*r));
789 if (len < 0) {
790 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
791 return -1;
792 }
793
794 host_len = af_bit_len(r->rtm_family);
795
796 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
797 table = rtm_get_table(r, tb);
798
799 if (!filter_nlmsg(n, tb, host_len))
800 return 0;
801
802 if (filter.flushb) {
803 struct nlmsghdr *fn;
804
805 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
806 ret = flush_update();
807 if (ret < 0)
808 return ret;
809 }
810 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
811 memcpy(fn, n, n->nlmsg_len);
812 fn->nlmsg_type = RTM_DELROUTE;
813 fn->nlmsg_flags = NLM_F_REQUEST;
814 fn->nlmsg_seq = ++rth.seq;
815 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
816 filter.flushed++;
817 if (show_stats < 2)
818 return 0;
819 }
820
821 print_headers(fp, "[ROUTE]");
822
823 open_json_object(NULL);
824 if (n->nlmsg_type == RTM_DELROUTE)
825 print_bool(PRINT_ANY, "deleted", "Deleted ", true);
826
827 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
828 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
829 print_string(PRINT_ANY, "type", "%s ",
830 rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
831
832 color = COLOR_NONE;
833 if (tb[RTA_DST]) {
834 family = get_real_family(r->rtm_type, r->rtm_family);
835 color = ifa_family_color(family);
836
837 if (r->rtm_dst_len != host_len) {
838 snprintf(b1, sizeof(b1),
839 "%s/%u", rt_addr_n2a_rta(family, tb[RTA_DST]),
840 r->rtm_dst_len);
841 } else {
842 const char *hostname = format_host_rta_r(family, tb[RTA_DST],
843 b2, sizeof(b2));
844 if (hostname)
845 strncpy(b1, hostname, sizeof(b1) - 1);
846 }
847 } else if (r->rtm_dst_len) {
848 snprintf(b1, sizeof(b1), "0/%d ", r->rtm_dst_len);
849 } else {
850 strncpy(b1, "default", sizeof(b1));
851 }
852 print_color_string(PRINT_ANY, color,
853 "dst", "%s ", b1);
854
855 if (tb[RTA_SRC]) {
856 family = get_real_family(r->rtm_type, r->rtm_family);
857 color = ifa_family_color(family);
858
859 if (r->rtm_src_len != host_len) {
860 snprintf(b1, sizeof(b1),
861 "%s/%u",
862 rt_addr_n2a_rta(family, tb[RTA_SRC]),
863 r->rtm_src_len);
864 } else {
865 const char *hostname = format_host_rta_r(family, tb[RTA_SRC],
866 b2, sizeof(b2));
867 if (hostname)
868 strncpy(b1, hostname, sizeof(b1) - 1);
869 }
870 print_color_string(PRINT_ANY, color,
871 "from", "from %s ", b1);
872 } else if (r->rtm_src_len) {
873 snprintf(b1, sizeof(b1), "0/%u", r->rtm_src_len);
874
875 print_string(PRINT_ANY, "src", "from %s ", b1);
876 }
877
878 if (tb[RTA_NH_ID])
879 print_uint(PRINT_ANY, "nhid", "nhid %u ",
880 rta_getattr_u32(tb[RTA_NH_ID]));
881
882 if (tb[RTA_NEWDST])
883 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
884
885 if (tb[RTA_ENCAP])
886 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
887
888 if (r->rtm_tos && filter.tosmask != -1) {
889 print_string(PRINT_ANY, "tos", "tos %s ",
890 rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
891 }
892
893 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len)
894 print_rta_gateway(fp, r->rtm_family, tb[RTA_GATEWAY]);
895
896 if (tb[RTA_VIA])
897 print_rta_via(fp, tb[RTA_VIA]);
898
899 if (tb[RTA_OIF] && filter.oifmask != -1)
900 print_rta_ifidx(fp, rta_getattr_u32(tb[RTA_OIF]), "dev");
901
902 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
903 print_string(PRINT_ANY,
904 "table", "table %s ",
905 rtnl_rttable_n2a(table, b1, sizeof(b1)));
906
907 if (!(r->rtm_flags & RTM_F_CLONED)) {
908 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) &&
909 filter.protocolmask != -1)
910 print_string(PRINT_ANY,
911 "protocol", "proto %s ",
912 rtnl_rtprot_n2a(r->rtm_protocol,
913 b1, sizeof(b1)));
914
915 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) &&
916 filter.scopemask != -1)
917 print_string(PRINT_ANY,
918 "scope", "scope %s ",
919 rtnl_rtscope_n2a(r->rtm_scope,
920 b1, sizeof(b1)));
921 }
922
923 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
924 const char *psrc
925 = rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]);
926
927
928
929
930 if (is_json_context())
931 print_string(PRINT_JSON, "prefsrc", NULL, psrc);
932 else {
933 fprintf(fp, "src ");
934 print_color_string(PRINT_FP,
935 ifa_family_color(r->rtm_family),
936 NULL, "%s ", psrc);
937 }
938
939 }
940
941 if (tb[RTA_PRIORITY] && filter.metricmask != -1)
942 print_uint(PRINT_ANY, "metric", "metric %u ",
943 rta_getattr_u32(tb[RTA_PRIORITY]));
944
945 print_rt_flags(fp, r->rtm_flags);
946
947 if (tb[RTA_MARK]) {
948 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
949
950 if (mark) {
951 if (is_json_context())
952 print_uint(PRINT_JSON, "mark", NULL, mark);
953 else if (mark >= 16)
954 print_0xhex(PRINT_FP, NULL,
955 "mark 0x%llx ", mark);
956 else
957 print_uint(PRINT_FP, NULL,
958 "mark %u ", mark);
959 }
960 }
961
962 if (tb[RTA_FLOW] && filter.realmmask != ~0U)
963 print_rta_flow(fp, tb[RTA_FLOW]);
964
965 if (tb[RTA_UID])
966 print_uint(PRINT_ANY, "uid", "uid %u ",
967 rta_getattr_u32(tb[RTA_UID]));
968
969 if (r->rtm_family == AF_INET) {
970 if (r->rtm_flags & RTM_F_CLONED)
971 print_cache_flags(fp, r->rtm_flags);
972
973 if (tb[RTA_CACHEINFO])
974 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
975 } else if (r->rtm_family == AF_INET6) {
976 if (tb[RTA_CACHEINFO])
977 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
978 }
979
980 if (tb[RTA_METRICS])
981 print_rta_metrics(fp, tb[RTA_METRICS]);
982
983 if (tb[RTA_IIF] && filter.iifmask != -1)
984 print_rta_ifidx(fp, rta_getattr_u32(tb[RTA_IIF]), "iif");
985
986 if (tb[RTA_PREF])
987 print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));
988
989 if (tb[RTA_TTL_PROPAGATE]) {
990 bool propagate = rta_getattr_u8(tb[RTA_TTL_PROPAGATE]);
991
992 if (is_json_context())
993 print_bool(PRINT_JSON, "ttl-propogate", NULL,
994 propagate);
995 else
996 print_string(PRINT_FP, NULL,
997 "ttl-propogate %s",
998 propagate ? "enabled" : "disabled");
999 }
1000
1001 if (tb[RTA_NH_ID] && show_details)
1002 print_cache_nexthop_id(fp, "\n\tnh_info ", "nh_info",
1003 rta_getattr_u32(tb[RTA_NH_ID]));
1004
1005 if (tb[RTA_MULTIPATH])
1006 print_rta_multipath(fp, r, tb[RTA_MULTIPATH]);
1007
1008
1009
1010
1011
1012
1013 print_string(PRINT_FP, NULL, "\n", NULL);
1014 close_json_object();
1015 fflush(fp);
1016 return 0;
1017}
1018
1019static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
1020 struct rtattr *rta, size_t len, struct rtnexthop *rtnh,
1021 int *argcp, char ***argvp)
1022{
1023 int argc = *argcp;
1024 char **argv = *argvp;
1025
1026 while (++argv, --argc > 0) {
1027 if (strcmp(*argv, "via") == 0) {
1028 inet_prefix addr;
1029 int family;
1030
1031 NEXT_ARG();
1032 family = read_family(*argv);
1033 if (family == AF_UNSPEC)
1034 family = r->rtm_family;
1035 else
1036 NEXT_ARG();
1037 get_addr(&addr, *argv, family);
1038 if (r->rtm_family == AF_UNSPEC)
1039 r->rtm_family = addr.family;
1040 if (addr.family == r->rtm_family) {
1041 if (rta_addattr_l(rta, len, RTA_GATEWAY,
1042 &addr.data, addr.bytelen))
1043 return -1;
1044 rtnh->rtnh_len += sizeof(struct rtattr)
1045 + addr.bytelen;
1046 } else {
1047 if (rta_addattr_l(rta, len, RTA_VIA,
1048 &addr.family, addr.bytelen + 2))
1049 return -1;
1050 rtnh->rtnh_len += RTA_SPACE(addr.bytelen + 2);
1051 }
1052 } else if (strcmp(*argv, "dev") == 0) {
1053 NEXT_ARG();
1054 rtnh->rtnh_ifindex = ll_name_to_index(*argv);
1055 if (!rtnh->rtnh_ifindex)
1056 return nodev(*argv);
1057 } else if (strcmp(*argv, "weight") == 0) {
1058 unsigned int w;
1059
1060 NEXT_ARG();
1061 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
1062 invarg("\"weight\" is invalid\n", *argv);
1063 rtnh->rtnh_hops = w - 1;
1064 } else if (strcmp(*argv, "onlink") == 0) {
1065 rtnh->rtnh_flags |= RTNH_F_ONLINK;
1066 } else if (matches(*argv, "realms") == 0) {
1067 __u32 realm;
1068
1069 NEXT_ARG();
1070 if (get_rt_realms_or_raw(&realm, *argv))
1071 invarg("\"realm\" value is invalid\n", *argv);
1072 if (rta_addattr32(rta, len, RTA_FLOW, realm))
1073 return -1;
1074 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
1075 } else if (strcmp(*argv, "encap") == 0) {
1076 int old_len = rta->rta_len;
1077
1078 if (lwt_parse_encap(rta, len, &argc, &argv,
1079 RTA_ENCAP, RTA_ENCAP_TYPE))
1080 return -1;
1081 rtnh->rtnh_len += rta->rta_len - old_len;
1082 } else if (strcmp(*argv, "as") == 0) {
1083 inet_prefix addr;
1084
1085 NEXT_ARG();
1086 if (strcmp(*argv, "to") == 0)
1087 NEXT_ARG();
1088 get_addr(&addr, *argv, r->rtm_family);
1089 if (rta_addattr_l(rta, len, RTA_NEWDST,
1090 &addr.data, addr.bytelen))
1091 return -1;
1092 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
1093 } else
1094 break;
1095 }
1096 *argcp = argc;
1097 *argvp = argv;
1098 return 0;
1099}
1100
1101static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
1102 int argc, char **argv)
1103{
1104 char buf[4096];
1105 struct rtattr *rta = (void *)buf;
1106 struct rtnexthop *rtnh;
1107
1108 rta->rta_type = RTA_MULTIPATH;
1109 rta->rta_len = RTA_LENGTH(0);
1110 rtnh = RTA_DATA(rta);
1111
1112 while (argc > 0) {
1113 if (strcmp(*argv, "nexthop") != 0) {
1114 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
1115 exit(-1);
1116 }
1117 if (argc <= 1) {
1118 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
1119 exit(-1);
1120 }
1121 memset(rtnh, 0, sizeof(*rtnh));
1122 rtnh->rtnh_len = sizeof(*rtnh);
1123 rta->rta_len += rtnh->rtnh_len;
1124 if (parse_one_nh(n, r, rta, 4096, rtnh, &argc, &argv)) {
1125 fprintf(stderr, "Error: cannot parse nexthop\n");
1126 exit(-1);
1127 }
1128 rtnh = RTNH_NEXT(rtnh);
1129 }
1130
1131 if (rta->rta_len > RTA_LENGTH(0))
1132 return addattr_l(n, 4096, RTA_MULTIPATH,
1133 RTA_DATA(rta), RTA_PAYLOAD(rta));
1134 return 0;
1135}
1136
1137static unsigned int parse_features(int *argcp, char ***argvp)
1138{
1139 unsigned int features = 0;
1140 char **argv = *argvp;
1141 int argc = *argcp;
1142
1143 while (++argv, --argc > 0) {
1144 if (strcmp(*argv, "ecn") == 0) {
1145 features |= RTAX_FEATURE_ECN;
1146 } else if (strcmp(*argv, "tcp_usec_ts") == 0) {
1147 features |= RTAX_FEATURE_TCP_USEC_TS;
1148 } else {
1149 break;
1150 }
1151 }
1152
1153 *argcp = argc;
1154 *argvp = argv;
1155 return features;
1156}
1157
1158static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
1159{
1160 struct {
1161 struct nlmsghdr n;
1162 struct rtmsg r;
1163 char buf[4096];
1164 } req = {
1165 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1166 .n.nlmsg_flags = NLM_F_REQUEST | flags,
1167 .n.nlmsg_type = cmd,
1168 .r.rtm_family = preferred_family,
1169 .r.rtm_table = RT_TABLE_MAIN,
1170 .r.rtm_scope = RT_SCOPE_NOWHERE,
1171 };
1172 char mxbuf[256];
1173 struct rtattr *mxrta = (void *)mxbuf;
1174 unsigned int mxlock = 0;
1175 char *d = NULL;
1176 int gw_ok = 0;
1177 int dst_ok = 0;
1178 int nhs_ok = 0;
1179 int scope_ok = 0;
1180 int table_ok = 0;
1181 int raw = 0;
1182 int type_ok = 0;
1183 __u32 nhid = 0;
1184 int ret;
1185
1186 if (cmd != RTM_DELROUTE) {
1187 req.r.rtm_protocol = RTPROT_BOOT;
1188 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1189 req.r.rtm_type = RTN_UNICAST;
1190 }
1191
1192 mxrta->rta_type = RTA_METRICS;
1193 mxrta->rta_len = RTA_LENGTH(0);
1194
1195 while (argc > 0) {
1196 if (strcmp(*argv, "src") == 0) {
1197 inet_prefix addr;
1198
1199 NEXT_ARG();
1200 get_addr(&addr, *argv, req.r.rtm_family);
1201 if (req.r.rtm_family == AF_UNSPEC)
1202 req.r.rtm_family = addr.family;
1203 addattr_l(&req.n, sizeof(req),
1204 RTA_PREFSRC, &addr.data, addr.bytelen);
1205 } else if (strcmp(*argv, "as") == 0) {
1206 inet_prefix addr;
1207
1208 NEXT_ARG();
1209 if (strcmp(*argv, "to") == 0) {
1210 NEXT_ARG();
1211 }
1212 get_addr(&addr, *argv, req.r.rtm_family);
1213 if (req.r.rtm_family == AF_UNSPEC)
1214 req.r.rtm_family = addr.family;
1215 addattr_l(&req.n, sizeof(req),
1216 RTA_NEWDST, &addr.data, addr.bytelen);
1217 } else if (strcmp(*argv, "via") == 0) {
1218 inet_prefix addr;
1219 int family;
1220
1221 if (gw_ok) {
1222 invarg("use nexthop syntax to specify multiple via\n",
1223 *argv);
1224 }
1225 gw_ok = 1;
1226 NEXT_ARG();
1227 family = read_family(*argv);
1228 if (family == AF_UNSPEC)
1229 family = req.r.rtm_family;
1230 else
1231 NEXT_ARG();
1232 get_addr(&addr, *argv, family);
1233 if (req.r.rtm_family == AF_UNSPEC)
1234 req.r.rtm_family = addr.family;
1235 if (addr.family == req.r.rtm_family)
1236 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
1237 &addr.data, addr.bytelen);
1238 else
1239 addattr_l(&req.n, sizeof(req), RTA_VIA,
1240 &addr.family, addr.bytelen+2);
1241 } else if (strcmp(*argv, "from") == 0) {
1242 inet_prefix addr;
1243
1244 NEXT_ARG();
1245 get_prefix(&addr, *argv, req.r.rtm_family);
1246 if (req.r.rtm_family == AF_UNSPEC)
1247 req.r.rtm_family = addr.family;
1248 if (addr.bytelen)
1249 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1250 req.r.rtm_src_len = addr.bitlen;
1251 } else if (strcmp(*argv, "tos") == 0 ||
1252 matches(*argv, "dsfield") == 0) {
1253 __u32 tos;
1254
1255 NEXT_ARG();
1256 if (rtnl_dsfield_a2n(&tos, *argv))
1257 invarg("\"tos\" value is invalid\n", *argv);
1258 req.r.rtm_tos = tos;
1259 } else if (strcmp(*argv, "expires") == 0) {
1260 __u32 expires;
1261
1262 NEXT_ARG();
1263 if (get_u32(&expires, *argv, 0))
1264 invarg("\"expires\" value is invalid\n", *argv);
1265 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
1266 } else if (matches(*argv, "metric") == 0 ||
1267 matches(*argv, "priority") == 0 ||
1268 strcmp(*argv, "preference") == 0) {
1269 __u32 metric;
1270
1271 NEXT_ARG();
1272 if (get_u32(&metric, *argv, 0))
1273 invarg("\"metric\" value is invalid\n", *argv);
1274 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
1275 } else if (strcmp(*argv, "scope") == 0) {
1276 __u32 scope = 0;
1277
1278 NEXT_ARG();
1279 if (rtnl_rtscope_a2n(&scope, *argv))
1280 invarg("invalid \"scope\" value\n", *argv);
1281 req.r.rtm_scope = scope;
1282 scope_ok = 1;
1283 } else if (strcmp(*argv, "mtu") == 0) {
1284 unsigned int mtu;
1285
1286 NEXT_ARG();
1287 if (strcmp(*argv, "lock") == 0) {
1288 mxlock |= (1<<RTAX_MTU);
1289 NEXT_ARG();
1290 }
1291 if (get_unsigned(&mtu, *argv, 0))
1292 invarg("\"mtu\" value is invalid\n", *argv);
1293 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
1294 } else if (strcmp(*argv, "hoplimit") == 0) {
1295 unsigned int hoplimit;
1296
1297 NEXT_ARG();
1298 if (strcmp(*argv, "lock") == 0) {
1299 mxlock |= (1<<RTAX_HOPLIMIT);
1300 NEXT_ARG();
1301 }
1302 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
1303 invarg("\"hoplimit\" value is invalid\n", *argv);
1304 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
1305 } else if (strcmp(*argv, "advmss") == 0) {
1306 unsigned int mss;
1307
1308 NEXT_ARG();
1309 if (strcmp(*argv, "lock") == 0) {
1310 mxlock |= (1<<RTAX_ADVMSS);
1311 NEXT_ARG();
1312 }
1313 if (get_unsigned(&mss, *argv, 0))
1314 invarg("\"mss\" value is invalid\n", *argv);
1315 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
1316 } else if (matches(*argv, "reordering") == 0) {
1317 unsigned int reord;
1318
1319 NEXT_ARG();
1320 if (strcmp(*argv, "lock") == 0) {
1321 mxlock |= (1<<RTAX_REORDERING);
1322 NEXT_ARG();
1323 }
1324 if (get_unsigned(&reord, *argv, 0))
1325 invarg("\"reordering\" value is invalid\n", *argv);
1326 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1327 } else if (strcmp(*argv, "rtt") == 0) {
1328 unsigned int rtt;
1329
1330 NEXT_ARG();
1331 if (strcmp(*argv, "lock") == 0) {
1332 mxlock |= (1<<RTAX_RTT);
1333 NEXT_ARG();
1334 }
1335 if (get_time_rtt(&rtt, *argv, &raw))
1336 invarg("\"rtt\" value is invalid\n", *argv);
1337 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1338 (raw) ? rtt : rtt * 8);
1339 } else if (strcmp(*argv, "rto_min") == 0) {
1340 unsigned int rto_min;
1341
1342 NEXT_ARG();
1343 mxlock |= (1<<RTAX_RTO_MIN);
1344 if (get_time_rtt(&rto_min, *argv, &raw))
1345 invarg("\"rto_min\" value is invalid\n",
1346 *argv);
1347 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1348 rto_min);
1349 } else if (matches(*argv, "window") == 0) {
1350 unsigned int win;
1351
1352 NEXT_ARG();
1353 if (strcmp(*argv, "lock") == 0) {
1354 mxlock |= (1<<RTAX_WINDOW);
1355 NEXT_ARG();
1356 }
1357 if (get_unsigned(&win, *argv, 0))
1358 invarg("\"window\" value is invalid\n", *argv);
1359 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1360 } else if (matches(*argv, "cwnd") == 0) {
1361 unsigned int win;
1362
1363 NEXT_ARG();
1364 if (strcmp(*argv, "lock") == 0) {
1365 mxlock |= (1<<RTAX_CWND);
1366 NEXT_ARG();
1367 }
1368 if (get_unsigned(&win, *argv, 0))
1369 invarg("\"cwnd\" value is invalid\n", *argv);
1370 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1371 } else if (matches(*argv, "initcwnd") == 0) {
1372 unsigned int win;
1373
1374 NEXT_ARG();
1375 if (strcmp(*argv, "lock") == 0) {
1376 mxlock |= (1<<RTAX_INITCWND);
1377 NEXT_ARG();
1378 }
1379 if (get_unsigned(&win, *argv, 0))
1380 invarg("\"initcwnd\" value is invalid\n", *argv);
1381 rta_addattr32(mxrta, sizeof(mxbuf),
1382 RTAX_INITCWND, win);
1383 } else if (matches(*argv, "initrwnd") == 0) {
1384 unsigned int win;
1385
1386 NEXT_ARG();
1387 if (strcmp(*argv, "lock") == 0) {
1388 mxlock |= (1<<RTAX_INITRWND);
1389 NEXT_ARG();
1390 }
1391 if (get_unsigned(&win, *argv, 0))
1392 invarg("\"initrwnd\" value is invalid\n", *argv);
1393 rta_addattr32(mxrta, sizeof(mxbuf),
1394 RTAX_INITRWND, win);
1395 } else if (matches(*argv, "features") == 0) {
1396 unsigned int features = 0;
1397
1398 features = parse_features(&argc, &argv);
1399 if (!features)
1400 invarg("\"features\" value not valid\n", *argv);
1401
1402
1403
1404
1405 PREV_ARG();
1406
1407 rta_addattr32(mxrta, sizeof(mxbuf),
1408 RTAX_FEATURES, features);
1409 } else if (matches(*argv, "quickack") == 0) {
1410 unsigned int quickack;
1411
1412 NEXT_ARG();
1413 if (get_unsigned(&quickack, *argv, 0))
1414 invarg("\"quickack\" value is invalid\n", *argv);
1415 if (quickack != 1 && quickack != 0)
1416 invarg("\"quickack\" value should be 0 or 1\n", *argv);
1417 rta_addattr32(mxrta, sizeof(mxbuf),
1418 RTAX_QUICKACK, quickack);
1419 } else if (matches(*argv, "congctl") == 0) {
1420 NEXT_ARG();
1421 if (strcmp(*argv, "lock") == 0) {
1422 mxlock |= 1 << RTAX_CC_ALGO;
1423 NEXT_ARG();
1424 }
1425 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1426 strlen(*argv));
1427 } else if (matches(*argv, "rttvar") == 0) {
1428 unsigned int win;
1429
1430 NEXT_ARG();
1431 if (strcmp(*argv, "lock") == 0) {
1432 mxlock |= (1<<RTAX_RTTVAR);
1433 NEXT_ARG();
1434 }
1435 if (get_time_rtt(&win, *argv, &raw))
1436 invarg("\"rttvar\" value is invalid\n", *argv);
1437 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1438 (raw) ? win : win * 4);
1439 } else if (matches(*argv, "ssthresh") == 0) {
1440 unsigned int win;
1441
1442 NEXT_ARG();
1443 if (strcmp(*argv, "lock") == 0) {
1444 mxlock |= (1<<RTAX_SSTHRESH);
1445 NEXT_ARG();
1446 }
1447 if (get_unsigned(&win, *argv, 0))
1448 invarg("\"ssthresh\" value is invalid\n", *argv);
1449 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1450 } else if (matches(*argv, "realms") == 0) {
1451 __u32 realm;
1452
1453 NEXT_ARG();
1454 if (get_rt_realms_or_raw(&realm, *argv))
1455 invarg("\"realm\" value is invalid\n", *argv);
1456 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1457 } else if (strcmp(*argv, "onlink") == 0) {
1458 req.r.rtm_flags |= RTNH_F_ONLINK;
1459 } else if (strcmp(*argv, "nexthop") == 0) {
1460 nhs_ok = 1;
1461 break;
1462 } else if (!strcmp(*argv, "nhid")) {
1463 NEXT_ARG();
1464 if (get_u32(&nhid, *argv, 0))
1465 invarg("\"id\" value is invalid\n", *argv);
1466 addattr32(&req.n, sizeof(req), RTA_NH_ID, nhid);
1467 } else if (matches(*argv, "protocol") == 0) {
1468 __u32 prot;
1469
1470 NEXT_ARG();
1471 if (rtnl_rtprot_a2n(&prot, *argv))
1472 invarg("\"protocol\" value is invalid\n", *argv);
1473 req.r.rtm_protocol = prot;
1474 } else if (matches(*argv, "table") == 0) {
1475 __u32 tid;
1476
1477 NEXT_ARG();
1478 if (rtnl_rttable_a2n(&tid, *argv))
1479 invarg("\"table\" value is invalid\n", *argv);
1480 if (tid < 256)
1481 req.r.rtm_table = tid;
1482 else {
1483 req.r.rtm_table = RT_TABLE_UNSPEC;
1484 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1485 }
1486 table_ok = 1;
1487 } else if (matches(*argv, "vrf") == 0) {
1488 __u32 tid;
1489
1490 NEXT_ARG();
1491 tid = ipvrf_get_table(*argv);
1492 if (tid == 0)
1493 invarg("Invalid VRF\n", *argv);
1494 if (tid < 256)
1495 req.r.rtm_table = tid;
1496 else {
1497 req.r.rtm_table = RT_TABLE_UNSPEC;
1498 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1499 }
1500 table_ok = 1;
1501 } else if (strcmp(*argv, "dev") == 0 ||
1502 strcmp(*argv, "oif") == 0) {
1503 NEXT_ARG();
1504 d = *argv;
1505 } else if (matches(*argv, "pref") == 0) {
1506 __u8 pref;
1507
1508 NEXT_ARG();
1509 if (strcmp(*argv, "low") == 0)
1510 pref = ICMPV6_ROUTER_PREF_LOW;
1511 else if (strcmp(*argv, "medium") == 0)
1512 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1513 else if (strcmp(*argv, "high") == 0)
1514 pref = ICMPV6_ROUTER_PREF_HIGH;
1515 else if (get_u8(&pref, *argv, 0))
1516 invarg("\"pref\" value is invalid\n", *argv);
1517 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1518 } else if (strcmp(*argv, "encap") == 0) {
1519 char buf[1024];
1520 struct rtattr *rta = (void *)buf;
1521
1522 rta->rta_type = RTA_ENCAP;
1523 rta->rta_len = RTA_LENGTH(0);
1524
1525 lwt_parse_encap(rta, sizeof(buf), &argc, &argv,
1526 RTA_ENCAP, RTA_ENCAP_TYPE);
1527
1528 if (rta->rta_len > RTA_LENGTH(0))
1529 addraw_l(&req.n, 1024
1530 , RTA_DATA(rta), RTA_PAYLOAD(rta));
1531 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1532 __u8 ttl_prop;
1533
1534 NEXT_ARG();
1535 if (matches(*argv, "enabled") == 0)
1536 ttl_prop = 1;
1537 else if (matches(*argv, "disabled") == 0)
1538 ttl_prop = 0;
1539 else
1540 invarg("\"ttl-propagate\" value is invalid\n",
1541 *argv);
1542
1543 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1544 ttl_prop);
1545 } else if (matches(*argv, "fastopen_no_cookie") == 0) {
1546 unsigned int fastopen_no_cookie;
1547
1548 NEXT_ARG();
1549 if (get_unsigned(&fastopen_no_cookie, *argv, 0))
1550 invarg("\"fastopen_no_cookie\" value is invalid\n", *argv);
1551 if (fastopen_no_cookie != 1 && fastopen_no_cookie != 0)
1552 invarg("\"fastopen_no_cookie\" value should be 0 or 1\n", *argv);
1553 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FASTOPEN_NO_COOKIE, fastopen_no_cookie);
1554 } else {
1555 int type;
1556 inet_prefix dst;
1557
1558 if (strcmp(*argv, "to") == 0) {
1559 NEXT_ARG();
1560 }
1561 if ((**argv < '0' || **argv > '9') &&
1562 rtnl_rtntype_a2n(&type, *argv) == 0) {
1563 NEXT_ARG();
1564 req.r.rtm_type = type;
1565 type_ok = 1;
1566 }
1567
1568 if (matches(*argv, "help") == 0)
1569 usage();
1570 if (dst_ok)
1571 duparg2("to", *argv);
1572 get_prefix(&dst, *argv, req.r.rtm_family);
1573 if (req.r.rtm_family == AF_UNSPEC)
1574 req.r.rtm_family = dst.family;
1575 req.r.rtm_dst_len = dst.bitlen;
1576 dst_ok = 1;
1577 if (dst.bytelen)
1578 addattr_l(&req.n, sizeof(req),
1579 RTA_DST, &dst.data, dst.bytelen);
1580 }
1581 argc--; argv++;
1582 }
1583
1584 if (!dst_ok)
1585 usage();
1586
1587 if (d) {
1588 int idx = ll_name_to_index(d);
1589
1590 if (!idx)
1591 return nodev(d);
1592 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1593 }
1594
1595 if (mxrta->rta_len > RTA_LENGTH(0)) {
1596 if (mxlock)
1597 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1598 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1599 }
1600
1601 if (nhs_ok && parse_nexthops(&req.n, &req.r, argc, argv))
1602 return -1;
1603
1604 if (req.r.rtm_family == AF_UNSPEC)
1605 req.r.rtm_family = AF_INET;
1606
1607 if (!table_ok) {
1608 if (req.r.rtm_type == RTN_LOCAL ||
1609 req.r.rtm_type == RTN_BROADCAST ||
1610 req.r.rtm_type == RTN_NAT ||
1611 req.r.rtm_type == RTN_ANYCAST)
1612 req.r.rtm_table = RT_TABLE_LOCAL;
1613 }
1614 if (!scope_ok) {
1615 if (req.r.rtm_family == AF_INET6 ||
1616 req.r.rtm_family == AF_MPLS)
1617 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1618 else if (req.r.rtm_type == RTN_LOCAL ||
1619 req.r.rtm_type == RTN_NAT)
1620 req.r.rtm_scope = RT_SCOPE_HOST;
1621 else if (req.r.rtm_type == RTN_BROADCAST ||
1622 req.r.rtm_type == RTN_MULTICAST ||
1623 req.r.rtm_type == RTN_ANYCAST)
1624 req.r.rtm_scope = RT_SCOPE_LINK;
1625 else if (req.r.rtm_type == RTN_UNICAST ||
1626 req.r.rtm_type == RTN_UNSPEC) {
1627 if (cmd == RTM_DELROUTE)
1628 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1629 else if (!gw_ok && !nhs_ok && !nhid)
1630 req.r.rtm_scope = RT_SCOPE_LINK;
1631 }
1632 }
1633
1634 if (!type_ok && req.r.rtm_family == AF_MPLS)
1635 req.r.rtm_type = RTN_UNICAST;
1636
1637 if (echo_request)
1638 ret = rtnl_echo_talk(&rth, &req.n, json, print_route);
1639 else
1640 ret = rtnl_talk(&rth, &req.n, NULL);
1641
1642 if (ret)
1643 return -2;
1644
1645 return 0;
1646}
1647
1648static int iproute_flush_cache(void)
1649{
1650#define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1651
1652 int len;
1653 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1654 char *buffer = "-1";
1655
1656 if (flush_fd < 0) {
1657 fprintf(stderr, "Cannot open \"%s\": %s\n",
1658 ROUTE_FLUSH_PATH, strerror(errno));
1659 return -1;
1660 }
1661
1662 len = strlen(buffer);
1663
1664 if ((write(flush_fd, (void *)buffer, len)) < len) {
1665 fprintf(stderr, "Cannot flush routing cache\n");
1666 close(flush_fd);
1667 return -1;
1668 }
1669 close(flush_fd);
1670 return 0;
1671}
1672
1673static __u32 route_dump_magic = 0x45311224;
1674
1675static int save_route(struct nlmsghdr *n, void *arg)
1676{
1677 int ret;
1678 int len = n->nlmsg_len;
1679 struct rtmsg *r = NLMSG_DATA(n);
1680 struct rtattr *tb[RTA_MAX+1];
1681 int host_len;
1682
1683 host_len = af_bit_len(r->rtm_family);
1684 len -= NLMSG_LENGTH(sizeof(*r));
1685 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1686
1687 if (!filter_nlmsg(n, tb, host_len))
1688 return 0;
1689
1690 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1691 if ((ret > 0) && (ret != n->nlmsg_len)) {
1692 fprintf(stderr, "Short write while saving nlmsg\n");
1693 ret = -EIO;
1694 }
1695
1696 return ret == n->nlmsg_len ? 0 : ret;
1697}
1698
1699static int save_route_prep(void)
1700{
1701 int ret;
1702
1703 if (isatty(STDOUT_FILENO)) {
1704 fprintf(stderr, "Not sending a binary stream to stdout\n");
1705 return -1;
1706 }
1707
1708 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1709 if (ret != sizeof(route_dump_magic)) {
1710 fprintf(stderr, "Can't write magic to dump file\n");
1711 return -1;
1712 }
1713
1714 return 0;
1715}
1716
1717static int iproute_dump_filter(struct nlmsghdr *nlh, int reqlen)
1718{
1719 struct rtmsg *rtm = NLMSG_DATA(nlh);
1720 int err;
1721
1722 rtm->rtm_protocol = filter.protocol;
1723 if (filter.cloned)
1724 rtm->rtm_flags |= RTM_F_CLONED;
1725
1726 if (filter.tb) {
1727 err = addattr32(nlh, reqlen, RTA_TABLE, filter.tb);
1728 if (err)
1729 return err;
1730 }
1731
1732 if (filter.oif) {
1733 err = addattr32(nlh, reqlen, RTA_OIF, filter.oif);
1734 if (err)
1735 return err;
1736 }
1737
1738 return 0;
1739}
1740
1741static int iproute_flush(int family, rtnl_filter_t filter_fn)
1742{
1743 time_t start = time(0);
1744 char flushb[4096-512];
1745 int round = 0;
1746 int ret;
1747
1748 if (filter.cloned) {
1749 if (family != AF_INET6) {
1750 ret = iproute_flush_cache();
1751 if (ret < 0)
1752 return ret;
1753
1754 if (show_stats)
1755 printf("*** IPv4 routing cache is flushed.\n");
1756 }
1757 if (family == AF_INET)
1758 return 0;
1759 }
1760
1761 filter.flushb = flushb;
1762 filter.flushp = 0;
1763 filter.flushe = sizeof(flushb);
1764
1765 for (;;) {
1766 if (rtnl_routedump_req(&rth, family, iproute_dump_filter) < 0) {
1767 perror("Cannot send dump request");
1768 return -2;
1769 }
1770 filter.flushed = 0;
1771 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1772 fprintf(stderr, "Flush terminated\n");
1773 return -2;
1774 }
1775 if (filter.flushed == 0) {
1776 if (show_stats) {
1777 if (round == 0 &&
1778 (!filter.cloned || family == AF_INET6))
1779 printf("Nothing to flush.\n");
1780 else
1781 printf("*** Flush is complete after %d round%s ***\n",
1782 round, round > 1 ? "s" : "");
1783 }
1784 fflush(stdout);
1785 return 0;
1786 }
1787 round++;
1788 ret = flush_update();
1789 if (ret < 0)
1790 return ret;
1791
1792 if (time(0) - start > 30) {
1793 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1794 (long)(time(0) - start), filter.flushed);
1795 return -1;
1796 }
1797
1798 if (show_stats) {
1799 printf("\n*** Round %d, deleting %d entries ***\n",
1800 round, filter.flushed);
1801 fflush(stdout);
1802 }
1803 }
1804}
1805
1806static int save_route_errhndlr(struct nlmsghdr *n, void *arg)
1807{
1808 int err = -*(int *)NLMSG_DATA(n);
1809
1810 if (n->nlmsg_type == NLMSG_DONE &&
1811 filter.tb == RT_TABLE_MAIN &&
1812 err == ENOENT)
1813 return RTNL_SUPPRESS_NLMSG_DONE_NLERR;
1814
1815 return RTNL_LET_NLERR;
1816}
1817
1818static int iproute_list_flush_or_save(int argc, char **argv, int action)
1819{
1820 int dump_family = preferred_family;
1821 char *id = NULL;
1822 char *od = NULL;
1823 unsigned int mark = 0;
1824 rtnl_filter_t filter_fn;
1825
1826 if (action == IPROUTE_SAVE) {
1827 if (save_route_prep())
1828 return -1;
1829
1830 filter_fn = save_route;
1831 } else
1832 filter_fn = print_route;
1833
1834 iproute_reset_filter(0);
1835 filter.tb = RT_TABLE_MAIN;
1836
1837 if ((action == IPROUTE_FLUSH) && argc <= 0) {
1838 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1839 return -1;
1840 }
1841
1842 while (argc > 0) {
1843 if (matches(*argv, "table") == 0) {
1844 __u32 tid;
1845
1846 NEXT_ARG();
1847 if (rtnl_rttable_a2n(&tid, *argv)) {
1848 if (strcmp(*argv, "all") == 0) {
1849 filter.tb = 0;
1850 } else if (strcmp(*argv, "cache") == 0) {
1851 filter.cloned = 1;
1852 } else if (strcmp(*argv, "help") == 0) {
1853 usage();
1854 } else {
1855 invarg("table id value is invalid\n", *argv);
1856 }
1857 } else
1858 filter.tb = tid;
1859 } else if (matches(*argv, "vrf") == 0) {
1860 __u32 tid;
1861
1862 NEXT_ARG();
1863 tid = ipvrf_get_table(*argv);
1864 if (tid == 0)
1865 invarg("Invalid VRF\n", *argv);
1866 filter.tb = tid;
1867 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1868 } else if (matches(*argv, "cached") == 0 ||
1869 matches(*argv, "cloned") == 0) {
1870 filter.cloned = 1;
1871 } else if (strcmp(*argv, "tos") == 0 ||
1872 matches(*argv, "dsfield") == 0) {
1873 __u32 tos;
1874
1875 NEXT_ARG();
1876 if (rtnl_dsfield_a2n(&tos, *argv))
1877 invarg("TOS value is invalid\n", *argv);
1878 filter.tos = tos;
1879 filter.tosmask = -1;
1880 } else if (matches(*argv, "protocol") == 0) {
1881 __u32 prot = 0;
1882
1883 NEXT_ARG();
1884 filter.protocolmask = -1;
1885 if (rtnl_rtprot_a2n(&prot, *argv)) {
1886 if (strcmp(*argv, "all") != 0)
1887 invarg("invalid \"protocol\"\n", *argv);
1888 prot = 0;
1889 filter.protocolmask = 0;
1890 }
1891 filter.protocol = prot;
1892 } else if (matches(*argv, "scope") == 0) {
1893 __u32 scope = 0;
1894
1895 NEXT_ARG();
1896 filter.scopemask = -1;
1897 if (rtnl_rtscope_a2n(&scope, *argv)) {
1898 if (strcmp(*argv, "all") != 0)
1899 invarg("invalid \"scope\"\n", *argv);
1900 scope = RT_SCOPE_NOWHERE;
1901 filter.scopemask = 0;
1902 }
1903 filter.scope = scope;
1904 } else if (matches(*argv, "type") == 0) {
1905 int type;
1906
1907 NEXT_ARG();
1908 if (rtnl_rtntype_a2n(&type, *argv))
1909 invarg("node type value is invalid\n", *argv);
1910 filter.typemask = (1<<type);
1911 } else if (strcmp(*argv, "dev") == 0 ||
1912 strcmp(*argv, "oif") == 0) {
1913 NEXT_ARG();
1914 od = *argv;
1915 } else if (strcmp(*argv, "iif") == 0) {
1916 NEXT_ARG();
1917 id = *argv;
1918 } else if (strcmp(*argv, "mark") == 0) {
1919 NEXT_ARG();
1920 if (get_unsigned(&mark, *argv, 0))
1921 invarg("invalid mark value", *argv);
1922 filter.markmask = -1;
1923 } else if (matches(*argv, "metric") == 0 ||
1924 matches(*argv, "priority") == 0 ||
1925 strcmp(*argv, "preference") == 0) {
1926 __u32 metric;
1927
1928 NEXT_ARG();
1929 if (get_u32(&metric, *argv, 0))
1930 invarg("\"metric\" value is invalid\n", *argv);
1931 filter.metric = metric;
1932 filter.metricmask = -1;
1933 } else if (strcmp(*argv, "via") == 0) {
1934 int family;
1935
1936 NEXT_ARG();
1937 family = read_family(*argv);
1938 if (family == AF_UNSPEC)
1939 family = dump_family;
1940 else
1941 NEXT_ARG();
1942 get_prefix(&filter.rvia, *argv, family);
1943 } else if (strcmp(*argv, "src") == 0) {
1944 NEXT_ARG();
1945 get_prefix(&filter.rprefsrc, *argv, dump_family);
1946 } else if (matches(*argv, "realms") == 0) {
1947 __u32 realm;
1948
1949 NEXT_ARG();
1950 if (get_rt_realms_or_raw(&realm, *argv))
1951 invarg("invalid realms\n", *argv);
1952 filter.realm = realm;
1953 filter.realmmask = ~0U;
1954 if ((filter.realm&0xFFFF) == 0 &&
1955 (*argv)[strlen(*argv) - 1] == '/')
1956 filter.realmmask &= ~0xFFFF;
1957 if ((filter.realm&0xFFFF0000U) == 0 &&
1958 (strchr(*argv, '/') == NULL ||
1959 (*argv)[0] == '/'))
1960 filter.realmmask &= ~0xFFFF0000U;
1961 } else if (matches(*argv, "from") == 0) {
1962 NEXT_ARG();
1963 if (matches(*argv, "root") == 0) {
1964 NEXT_ARG();
1965 get_prefix(&filter.rsrc, *argv, dump_family);
1966 } else if (matches(*argv, "match") == 0) {
1967 NEXT_ARG();
1968 get_prefix(&filter.msrc, *argv, dump_family);
1969 } else {
1970 if (matches(*argv, "exact") == 0) {
1971 NEXT_ARG();
1972 }
1973 get_prefix(&filter.msrc, *argv, dump_family);
1974 filter.rsrc = filter.msrc;
1975 }
1976 } else {
1977 if (matches(*argv, "to") == 0) {
1978 NEXT_ARG();
1979 }
1980 if (matches(*argv, "root") == 0) {
1981 NEXT_ARG();
1982 get_prefix(&filter.rdst, *argv, dump_family);
1983 } else if (matches(*argv, "match") == 0) {
1984 NEXT_ARG();
1985 get_prefix(&filter.mdst, *argv, dump_family);
1986 } else {
1987 if (matches(*argv, "exact") == 0) {
1988 NEXT_ARG();
1989 }
1990 get_prefix(&filter.mdst, *argv, dump_family);
1991 filter.rdst = filter.mdst;
1992 }
1993 }
1994 argc--; argv++;
1995 }
1996
1997 if (dump_family == AF_UNSPEC && filter.tb)
1998 dump_family = AF_INET;
1999
2000 if (id || od) {
2001 int idx;
2002
2003 if (id) {
2004 idx = ll_name_to_index(id);
2005 if (!idx)
2006 return nodev(id);
2007 filter.iif = idx;
2008 filter.iifmask = -1;
2009 }
2010 if (od) {
2011 idx = ll_name_to_index(od);
2012 if (!idx)
2013 return nodev(od);
2014 filter.oif = idx;
2015 filter.oifmask = -1;
2016 }
2017 }
2018 filter.mark = mark;
2019
2020 if (action == IPROUTE_FLUSH)
2021 return iproute_flush(dump_family, filter_fn);
2022
2023 if (rtnl_routedump_req(&rth, dump_family, iproute_dump_filter) < 0) {
2024 perror("Cannot send dump request");
2025 return -2;
2026 }
2027
2028 new_json_obj(json);
2029
2030 if (rtnl_dump_filter_errhndlr(&rth, filter_fn, stdout,
2031 save_route_errhndlr, NULL) < 0) {
2032 fprintf(stderr, "Dump terminated\n");
2033 delete_json_obj();
2034 return -2;
2035 }
2036
2037 delete_json_obj();
2038 fflush(stdout);
2039 return 0;
2040}
2041
2042
2043static int iproute_get(int argc, char **argv)
2044{
2045 struct {
2046 struct nlmsghdr n;
2047 struct rtmsg r;
2048 char buf[1024];
2049 } req = {
2050 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
2051 .n.nlmsg_flags = NLM_F_REQUEST,
2052 .n.nlmsg_type = RTM_GETROUTE,
2053 .r.rtm_family = preferred_family,
2054 };
2055 char *idev = NULL;
2056 char *odev = NULL;
2057 struct nlmsghdr *answer;
2058 int connected = 0;
2059 int fib_match = 0;
2060 int from_ok = 0;
2061 unsigned int mark = 0;
2062 bool address_found = false;
2063
2064 iproute_reset_filter(0);
2065 filter.cloned = 2;
2066
2067 while (argc > 0) {
2068 if (strcmp(*argv, "tos") == 0 ||
2069 matches(*argv, "dsfield") == 0) {
2070 __u32 tos;
2071
2072 NEXT_ARG();
2073 if (rtnl_dsfield_a2n(&tos, *argv))
2074 invarg("TOS value is invalid\n", *argv);
2075 req.r.rtm_tos = tos;
2076 } else if (matches(*argv, "from") == 0) {
2077 inet_prefix addr;
2078
2079 NEXT_ARG();
2080 if (matches(*argv, "help") == 0)
2081 usage();
2082 from_ok = 1;
2083 get_prefix(&addr, *argv, req.r.rtm_family);
2084 if (req.r.rtm_family == AF_UNSPEC)
2085 req.r.rtm_family = addr.family;
2086 if (addr.bytelen)
2087 addattr_l(&req.n, sizeof(req), RTA_SRC,
2088 &addr.data, addr.bytelen);
2089 req.r.rtm_src_len = addr.bitlen;
2090 } else if (matches(*argv, "iif") == 0) {
2091 NEXT_ARG();
2092 idev = *argv;
2093 } else if (matches(*argv, "mark") == 0) {
2094 NEXT_ARG();
2095 if (get_unsigned(&mark, *argv, 0))
2096 invarg("invalid mark value", *argv);
2097 } else if (matches(*argv, "oif") == 0 ||
2098 strcmp(*argv, "dev") == 0) {
2099 NEXT_ARG();
2100 odev = *argv;
2101 } else if (matches(*argv, "notify") == 0) {
2102 req.r.rtm_flags |= RTM_F_NOTIFY;
2103 } else if (matches(*argv, "connected") == 0) {
2104 connected = 1;
2105 } else if (matches(*argv, "vrf") == 0) {
2106 NEXT_ARG();
2107 if (!name_is_vrf(*argv))
2108 invarg("Invalid VRF\n", *argv);
2109 odev = *argv;
2110 } else if (matches(*argv, "uid") == 0) {
2111 uid_t uid;
2112
2113 NEXT_ARG();
2114 if (get_unsigned(&uid, *argv, 0))
2115 invarg("invalid UID\n", *argv);
2116 addattr32(&req.n, sizeof(req), RTA_UID, uid);
2117 } else if (matches(*argv, "fibmatch") == 0) {
2118 fib_match = 1;
2119 } else if (strcmp(*argv, "as") == 0) {
2120 inet_prefix addr;
2121
2122 NEXT_ARG();
2123 if (strcmp(*argv, "to") == 0)
2124 NEXT_ARG();
2125 get_addr(&addr, *argv, req.r.rtm_family);
2126 if (req.r.rtm_family == AF_UNSPEC)
2127 req.r.rtm_family = addr.family;
2128 addattr_l(&req.n, sizeof(req), RTA_NEWDST,
2129 &addr.data, addr.bytelen);
2130 } else if (matches(*argv, "sport") == 0) {
2131 __be16 sport;
2132
2133 NEXT_ARG();
2134 if (get_be16(&sport, *argv, 0))
2135 invarg("invalid sport\n", *argv);
2136 addattr16(&req.n, sizeof(req), RTA_SPORT, sport);
2137 } else if (matches(*argv, "dport") == 0) {
2138 __be16 dport;
2139
2140 NEXT_ARG();
2141 if (get_be16(&dport, *argv, 0))
2142 invarg("invalid dport\n", *argv);
2143 addattr16(&req.n, sizeof(req), RTA_DPORT, dport);
2144 } else if (matches(*argv, "ipproto") == 0) {
2145 int ipproto;
2146
2147 NEXT_ARG();
2148 ipproto = inet_proto_a2n(*argv);
2149 if (ipproto < 0)
2150 invarg("Invalid \"ipproto\" value\n",
2151 *argv);
2152 addattr8(&req.n, sizeof(req), RTA_IP_PROTO, ipproto);
2153 } else if (strcmp(*argv, "flowlabel") == 0) {
2154 __be32 flowlabel;
2155
2156 NEXT_ARG();
2157 if (get_be32(&flowlabel, *argv, 0))
2158 invarg("invalid flowlabel", *argv);
2159 addattr32(&req.n, sizeof(req), RTA_FLOWLABEL,
2160 flowlabel);
2161 } else {
2162 inet_prefix addr;
2163
2164 if (strcmp(*argv, "to") == 0) {
2165 NEXT_ARG();
2166 }
2167 if (matches(*argv, "help") == 0)
2168 usage();
2169 get_prefix(&addr, *argv, req.r.rtm_family);
2170 if (req.r.rtm_family == AF_UNSPEC)
2171 req.r.rtm_family = addr.family;
2172 if (addr.bytelen)
2173 addattr_l(&req.n, sizeof(req),
2174 RTA_DST, &addr.data, addr.bytelen);
2175 if (req.r.rtm_family == AF_INET && addr.bitlen != 32) {
2176 fprintf(stderr,
2177 "Warning: /%u as prefix is invalid, only /32 (or none) is supported.\n",
2178 addr.bitlen);
2179 req.r.rtm_dst_len = 32;
2180 } else if (req.r.rtm_family == AF_INET6 && addr.bitlen != 128) {
2181 fprintf(stderr,
2182 "Warning: /%u as prefix is invalid, only /128 (or none) is supported.\n",
2183 addr.bitlen);
2184 req.r.rtm_dst_len = 128;
2185 } else
2186 req.r.rtm_dst_len = addr.bitlen;
2187 address_found = true;
2188 }
2189 argc--; argv++;
2190 }
2191
2192 if (!address_found) {
2193 fprintf(stderr, "need at least a destination address\n");
2194 return -1;
2195 }
2196
2197 if (idev || odev) {
2198 int idx;
2199
2200 if (idev) {
2201 idx = ll_name_to_index(idev);
2202 if (!idx)
2203 return nodev(idev);
2204 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
2205 }
2206 if (odev) {
2207 idx = ll_name_to_index(odev);
2208 if (!idx)
2209 return nodev(odev);
2210 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
2211 }
2212 }
2213 if (mark)
2214 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
2215
2216 if (req.r.rtm_family == AF_UNSPEC)
2217 req.r.rtm_family = AF_INET;
2218
2219
2220 if (req.r.rtm_family == AF_INET)
2221 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
2222 if (fib_match)
2223 req.r.rtm_flags |= RTM_F_FIB_MATCH;
2224
2225 if (rtnl_talk(&rth, &req.n, &answer) < 0)
2226 return -2;
2227
2228 new_json_obj(json);
2229
2230 if (connected && !from_ok) {
2231 struct rtmsg *r = NLMSG_DATA(answer);
2232 int len = answer->nlmsg_len;
2233 struct rtattr *tb[RTA_MAX+1];
2234
2235 if (print_route(answer, (void *)stdout) < 0) {
2236 fprintf(stderr, "An error :-)\n");
2237 delete_json_obj();
2238 free(answer);
2239 return -1;
2240 }
2241
2242 if (answer->nlmsg_type != RTM_NEWROUTE) {
2243 fprintf(stderr, "Not a route?\n");
2244 delete_json_obj();
2245 free(answer);
2246 return -1;
2247 }
2248 len -= NLMSG_LENGTH(sizeof(*r));
2249 if (len < 0) {
2250 fprintf(stderr, "Wrong len %d\n", len);
2251 delete_json_obj();
2252 free(answer);
2253 return -1;
2254 }
2255
2256 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2257
2258 if (tb[RTA_PREFSRC]) {
2259 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
2260 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
2261 } else if (!tb[RTA_SRC]) {
2262 fprintf(stderr, "Failed to connect the route\n");
2263 delete_json_obj();
2264 free(answer);
2265 return -1;
2266 }
2267 if (!odev && tb[RTA_OIF])
2268 tb[RTA_OIF]->rta_type = 0;
2269 if (tb[RTA_GATEWAY])
2270 tb[RTA_GATEWAY]->rta_type = 0;
2271 if (tb[RTA_VIA])
2272 tb[RTA_VIA]->rta_type = 0;
2273 if (!idev && tb[RTA_IIF])
2274 tb[RTA_IIF]->rta_type = 0;
2275 req.n.nlmsg_flags = NLM_F_REQUEST;
2276 req.n.nlmsg_type = RTM_GETROUTE;
2277
2278 delete_json_obj();
2279 free(answer);
2280 if (rtnl_talk(&rth, &req.n, &answer) < 0)
2281 return -2;
2282 }
2283
2284 if (print_route(answer, (void *)stdout) < 0) {
2285 fprintf(stderr, "An error :-)\n");
2286 delete_json_obj();
2287 free(answer);
2288 return -1;
2289 }
2290
2291 delete_json_obj();
2292 free(answer);
2293 return 0;
2294}
2295
2296static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
2297{
2298 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
2299 return 1;
2300
2301 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
2302}
2303
2304static int restore_handler(struct rtnl_ctrl_data *ctrl,
2305 struct nlmsghdr *n, void *arg)
2306{
2307 struct rtmsg *r = NLMSG_DATA(n);
2308 struct rtattr *tb[RTA_MAX+1];
2309 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
2310 int ret, prio = *(int *)arg;
2311
2312 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2313
2314
2315
2316
2317
2318
2319 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
2320 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
2321 goto restore;
2322 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
2323 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
2324 goto restore;
2325 else if (prio == 2 && tb[RTA_GATEWAY])
2326 goto restore;
2327
2328 return 0;
2329
2330restore:
2331 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
2332
2333 ll_init_map(&rth);
2334
2335 ret = rtnl_talk(&rth, n, NULL);
2336 if ((ret < 0) && (errno == EEXIST))
2337 ret = 0;
2338
2339 return ret;
2340}
2341
2342static int route_dump_check_magic(void)
2343{
2344 int ret;
2345 __u32 magic = 0;
2346
2347 if (isatty(STDIN_FILENO)) {
2348 fprintf(stderr, "Can't restore route dump from a terminal\n");
2349 return -1;
2350 }
2351
2352 ret = fread(&magic, sizeof(magic), 1, stdin);
2353 if (magic != route_dump_magic) {
2354 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
2355 return -1;
2356 }
2357
2358 return 0;
2359}
2360
2361static int iproute_restore(void)
2362{
2363 int pos, prio;
2364
2365 if (route_dump_check_magic())
2366 return -1;
2367
2368 pos = ftell(stdin);
2369 if (pos == -1) {
2370 perror("Failed to restore: ftell");
2371 return -1;
2372 }
2373
2374 for (prio = 0; prio < 3; prio++) {
2375 int err;
2376
2377 err = rtnl_from_file(stdin, &restore_handler, &prio);
2378 if (err)
2379 return -2;
2380
2381 if (fseek(stdin, pos, SEEK_SET) == -1) {
2382 perror("Failed to restore: fseek");
2383 return -1;
2384 }
2385 }
2386
2387 return 0;
2388}
2389
2390static int show_handler(struct rtnl_ctrl_data *ctrl,
2391 struct nlmsghdr *n, void *arg)
2392{
2393 print_route(n, stdout);
2394 return 0;
2395}
2396
2397static int iproute_showdump(void)
2398{
2399 if (route_dump_check_magic())
2400 return -1;
2401
2402 if (rtnl_from_file(stdin, &show_handler, NULL))
2403 return -2;
2404
2405 return 0;
2406}
2407
2408void iproute_reset_filter(int ifindex)
2409{
2410 memset(&filter, 0, sizeof(filter));
2411 filter.mdst.bitlen = -1;
2412 filter.msrc.bitlen = -1;
2413 filter.oif = ifindex;
2414 if (filter.oif > 0)
2415 filter.oifmask = -1;
2416}
2417
2418int do_iproute(int argc, char **argv)
2419{
2420 if (argc < 1)
2421 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
2422
2423 if (matches(*argv, "add") == 0)
2424 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
2425 argc-1, argv+1);
2426 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
2427 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
2428 argc-1, argv+1);
2429 if (matches(*argv, "replace") == 0)
2430 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
2431 argc-1, argv+1);
2432 if (matches(*argv, "prepend") == 0)
2433 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
2434 argc-1, argv+1);
2435 if (matches(*argv, "append") == 0)
2436 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
2437 argc-1, argv+1);
2438 if (matches(*argv, "test") == 0)
2439 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
2440 argc-1, argv+1);
2441 if (matches(*argv, "delete") == 0)
2442 return iproute_modify(RTM_DELROUTE, 0,
2443 argc-1, argv+1);
2444 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2445 || matches(*argv, "lst") == 0)
2446 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
2447 if (matches(*argv, "get") == 0)
2448 return iproute_get(argc-1, argv+1);
2449 if (matches(*argv, "flush") == 0)
2450 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2451 if (matches(*argv, "save") == 0)
2452 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2453 if (matches(*argv, "restore") == 0)
2454 return iproute_restore();
2455 if (matches(*argv, "showdump") == 0)
2456 return iproute_showdump();
2457 if (matches(*argv, "help") == 0)
2458 usage();
2459
2460 fprintf(stderr,
2461 "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
2462 exit(-1);
2463}
2464
