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ip route: print RTA_CACHEINFO if it exists
[mirror_iproute2.git] / ip / iproute.c
CommitLineData
aba5acdf
SH		 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 *
aba5acdf
SH		 11 */
12
13#include <stdio.h>
14#include <stdlib.h>
15#include <unistd.h>
aba5acdf
SH		 16#include <fcntl.h>
17#include <string.h>
33551240 18#include <time.h>
aba5acdf
SH		 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>
194e9b85 25#include <linux/icmpv6.h>
f4ff11e3 26#include <errno.h>
aba5acdf
SH		 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
f4ff11e3
DS		 36enum list_action {
37 IPROUTE_LIST,
38 IPROUTE_FLUSH,
39 IPROUTE_SAVE,
40};
f38c7334 41static const char *mx_names[RTAX_MAX+1] = {
e54ed380
CP		 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"
f38c7334 58};
aba5acdf
SH		 59static void usage(void) __attribute__((noreturn));
60
61static void usage(void)
62{
21fef525
SH		 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 ]\n"
73 " ip route { add | del | change | append | replace } ROUTE\n"
74 "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"
75 " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n"
76 " [ type TYPE ] [ scope SCOPE ]\n"
77 "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"
78 "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"
79 " [ table TABLE_ID ] [ proto RTPROTO ]\n"
80 " [ scope SCOPE ] [ metric METRIC ]\n"
81 " [ ttl-propagate { enabled | disabled } ]\n"
82 "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n"
83 "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n"
84 " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"
85 "FAMILY := [ inet | inet6 | ipx | dnet | mpls | bridge | link ]\n"
86 "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n"
87 " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n"
88 " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"
89 " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"
90 " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n"
91 " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n"
e54ed380 92 " [ pref PREF ] [ expires TIME ] [ fastopen_no_cookie BOOL ]\n"
21fef525
SH		 93 "TYPE := { unicast | local | broadcast | multicast | throw |\n"
94 " unreachable | prohibit | blackhole | nat }\n"
95 "TABLE_ID := [ local | main | default | all | NUMBER ]\n"
96 "SCOPE := [ host | link | global | NUMBER ]\n"
97 "NHFLAGS := [ onlink | pervasive ]\n"
98 "RTPROTO := [ kernel | boot | static | NUMBER ]\n"
99 "PREF := [ low | medium | high ]\n"
100 "TIME := NUMBER[s|ms]\n"
101 "BOOL := [1|0]\n"
102 "FEATURES := ecn\n"
103 "ENCAPTYPE := [ mpls | ip | ip6 | seg6 | seg6local ]\n"
104 "ENCAPHDR := [ MPLSLABEL | SEG6HDR ]\n"
105 "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n"
106 "SEGMODE := [ encap | inline ]\n"
107 "ROUTE_GET_FLAGS := [ fibmatch ]\n");
aba5acdf
SH		 108 exit(-1);
109}
110
111
112static struct
113{
caae16b3 114 unsigned int tb;
bd4bcdad 115 int cloned;
aba5acdf
SH		 116 int flushed;
117 char *flushb;
118 int flushp;
119 int flushe;
aba5acdf
SH		 120 int protocol, protocolmask;
121 int scope, scopemask;
d84b1878 122 __u64 typemask;
aba5acdf
SH		 123 int tos, tosmask;
124 int iif, iifmask;
125 int oif, oifmask;
b0373bfb 126 int mark, markmask;
aba5acdf 127 int realm, realmmask;
ed7fdc95 128 __u32 metric, metricmask;
aba5acdf
SH		 129 inet_prefix rprefsrc;
130 inet_prefix rvia;
131 inet_prefix rdst;
132 inet_prefix mdst;
133 inet_prefix rsrc;
134 inet_prefix msrc;
135} filter;
136
137static int flush_update(void)
138{
f31a37f7 139 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
1fb0a998 140 perror("Failed to send flush request");
2f406f2d 141 return -2;
aba5acdf
SH		 142 }
143 filter.flushp = 0;
144 return 0;
145}
146
d1f28cf1 147static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
aba5acdf 148{
aba5acdf 149 struct rtmsg *r = NLMSG_DATA(n);
d17b136f
PS		 150 inet_prefix dst = { .family = r->rtm_family };
151 inet_prefix src = { .family = r->rtm_family };
152 inet_prefix via = { .family = r->rtm_family };
153 inet_prefix prefsrc = { .family = r->rtm_family };
34e95647 154 __u32 table;
f4ff11e3 155 static int ip6_multiple_tables;
aba5acdf 156
34e95647
PM		 157 table = rtm_get_table(r, tb);
158
5b9ac190
AV		 159 if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
160 return 0;
161
34e95647 162 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
e0b29fe7
PM		 163 ip6_multiple_tables = 1;
164
80d1c528 165 if (filter.cloned == !(r->rtm_flags & RTM_F_CLONED))
44792827
UW		 166 return 0;
167
e0b29fe7 168 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
aba5acdf 169 if (filter.tb) {
bd4bcdad
PM		 170 if (filter.tb == RT_TABLE_LOCAL) {
171 if (r->rtm_type != RTN_LOCAL)
aba5acdf 172 return 0;
bd4bcdad
PM		 173 } else if (filter.tb == RT_TABLE_MAIN) {
174 if (r->rtm_type == RTN_LOCAL)
aba5acdf 175 return 0;
bd4bcdad
PM		 176 } else {
177 return 0;
aba5acdf
SH		 178 }
179 }
180 } else {
34e95647 181 if (filter.tb > 0 && filter.tb != table)
aba5acdf
SH		 182 return 0;
183 }
184 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
185 return 0;
186 if ((filter.scope^r->rtm_scope)&filter.scopemask)
187 return 0;
d84b1878
DA		 188
189 if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
aba5acdf
SH		 190 return 0;
191 if ((filter.tos^r->rtm_tos)&filter.tosmask)
192 return 0;
c1218072
AZ		 193 if (filter.rdst.family) {
194 if (r->rtm_family != filter.rdst.family ||
195 filter.rdst.bitlen > r->rtm_dst_len)
196 return 0;
197 } else if (filter.rdst.flags & PREFIXLEN_SPECIFIED) {
198 if (filter.rdst.bitlen > r->rtm_dst_len)
199 return 0;
200 }
201 if (filter.mdst.family) {
202 if (r->rtm_family != filter.mdst.family ||
203 (filter.mdst.bitlen >= 0 &&
204 filter.mdst.bitlen < r->rtm_dst_len))
205 return 0;
206 } else if (filter.mdst.flags & PREFIXLEN_SPECIFIED) {
207 if (filter.mdst.bitlen >= 0 &&
208 filter.mdst.bitlen < r->rtm_dst_len)
209 return 0;
210 }
211 if (filter.rsrc.family) {
212 if (r->rtm_family != filter.rsrc.family ||
213 filter.rsrc.bitlen > r->rtm_src_len)
214 return 0;
215 } else if (filter.rsrc.flags & PREFIXLEN_SPECIFIED) {
216 if (filter.rsrc.bitlen > r->rtm_src_len)
217 return 0;
218 }
219 if (filter.msrc.family) {
220 if (r->rtm_family != filter.msrc.family ||
221 (filter.msrc.bitlen >= 0 &&
222 filter.msrc.bitlen < r->rtm_src_len))
223 return 0;
224 } else if (filter.msrc.flags & PREFIXLEN_SPECIFIED) {
225 if (filter.msrc.bitlen >= 0 &&
226 filter.msrc.bitlen < r->rtm_src_len)
227 return 0;
228 }
93ae2835
EB		 229 if (filter.rvia.family) {
230 int family = r->rtm_family;
56f5daac 231
93ae2835
EB		 232 if (tb[RTA_VIA]) {
233 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
56f5daac 234
93ae2835
EB		 235 family = via->rtvia_family;
236 }
237 if (family != filter.rvia.family)
238 return 0;
239 }
aba5acdf
SH		 240 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
241 return 0;
242
aba5acdf
SH		 243 if (tb[RTA_DST])
244 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
c1218072
AZ		 245 if (filter.rsrc.family || filter.msrc.family ||
246 filter.rsrc.flags & PREFIXLEN_SPECIFIED ||
247 filter.msrc.flags & PREFIXLEN_SPECIFIED) {
aba5acdf
SH		 248 if (tb[RTA_SRC])
249 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
250 }
56f5daac 251 if (filter.rvia.bitlen > 0) {
aba5acdf 252 if (tb[RTA_GATEWAY])
7849fb55 253 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
93ae2835
EB		 254 if (tb[RTA_VIA]) {
255 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
256 struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
56f5daac 257
93ae2835
EB		 258 via.family = rtvia->rtvia_family;
259 memcpy(&via.data, rtvia->rtvia_addr, len);
260 }
aba5acdf 261 }
56f5daac 262 if (filter.rprefsrc.bitlen > 0) {
aba5acdf 263 if (tb[RTA_PREFSRC])
7849fb55 264 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
aba5acdf
SH		 265 }
266
c1218072
AZ		 267 if ((filter.rdst.family || filter.rdst.flags & PREFIXLEN_SPECIFIED) &&
268 inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
aba5acdf 269 return 0;
c1218072 270 if ((filter.mdst.family || filter.mdst.flags & PREFIXLEN_SPECIFIED) &&
aba5acdf
SH		 271 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
272 return 0;
273
c1218072
AZ		 274 if ((filter.rsrc.family || filter.rsrc.flags & PREFIXLEN_SPECIFIED) &&
275 inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
aba5acdf 276 return 0;
c1218072
AZ		 277 if ((filter.msrc.family || filter.msrc.flags & PREFIXLEN_SPECIFIED) &&
278 filter.msrc.bitlen >= 0 &&
aba5acdf
SH		 279 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
280 return 0;
281
282 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
283 return 0;
284 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
285 return 0;
286 if (filter.realmmask) {
287 __u32 realms = 0;
56f5daac 288
aba5acdf 289 if (tb[RTA_FLOW])
ff24746c 290 realms = rta_getattr_u32(tb[RTA_FLOW]);
aba5acdf
SH		 291 if ((realms^filter.realm)&filter.realmmask)
292 return 0;
293 }
294 if (filter.iifmask) {
295 int iif = 0;
56f5daac 296
aba5acdf 297 if (tb[RTA_IIF])
9f1370c0 298 iif = rta_getattr_u32(tb[RTA_IIF]);
aba5acdf
SH		 299 if ((iif^filter.iif)&filter.iifmask)
300 return 0;
301 }
302 if (filter.oifmask) {
303 int oif = 0;
56f5daac 304
aba5acdf 305 if (tb[RTA_OIF])
9f1370c0 306 oif = rta_getattr_u32(tb[RTA_OIF]);
aba5acdf
SH		 307 if ((oif^filter.oif)&filter.oifmask)
308 return 0;
309 }
b0373bfb
ED		 310 if (filter.markmask) {
311 int mark = 0;
56f5daac 312
b0373bfb 313 if (tb[RTA_MARK])
9f1370c0 314 mark = rta_getattr_u32(tb[RTA_MARK]);
b0373bfb
ED		 315 if ((mark ^ filter.mark) & filter.markmask)
316 return 0;
317 }
ed7fdc95
AZ		 318 if (filter.metricmask) {
319 __u32 metric = 0;
320
321 if (tb[RTA_PRIORITY])
322 metric = rta_getattr_u32(tb[RTA_PRIORITY]);
323 if ((metric ^ filter.metric) & filter.metricmask)
324 return 0;
325 }
ae665a52 326 if (filter.flushb &&
aba5acdf
SH		 327 r->rtm_family == AF_INET6 &&
328 r->rtm_dst_len == 0 &&
329 r->rtm_type == RTN_UNREACHABLE &&
330 tb[RTA_PRIORITY] &&
9f1370c0 331 rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
aba5acdf
SH		 332 return 0;
333
f4ff11e3
DS		 334 return 1;
335}
336
29d1f730
FW		 337static void print_rtax_features(FILE *fp, unsigned int features)
338{
339 unsigned int of = features;
340
341 if (features & RTAX_FEATURE_ECN) {
663c3cb2 342 print_null(PRINT_ANY, "ecn", "ecn ", NULL);
29d1f730
FW		 343 features &= ~RTAX_FEATURE_ECN;
344 }
345
346 if (features)
663c3cb2
SH		 347 print_0xhex(PRINT_ANY,
348 "features", "0x%x ", of);
29d1f730
FW		 349}
350
b3ab1e68
SH		 351static void print_rt_flags(FILE *fp, unsigned int flags)
352{
663c3cb2
SH		 353 open_json_array(PRINT_JSON,
354 is_json_context() ? "flags" : "");
355
b3ab1e68 356 if (flags & RTNH_F_DEAD)
663c3cb2 357 print_string(PRINT_ANY, NULL, "%s ", "dead");
b3ab1e68 358 if (flags & RTNH_F_ONLINK)
663c3cb2 359 print_string(PRINT_ANY, NULL, "%s ", "onlink");
b3ab1e68 360 if (flags & RTNH_F_PERVASIVE)
663c3cb2 361 print_string(PRINT_ANY, NULL, "%s ", "pervasive");
b3ab1e68 362 if (flags & RTNH_F_OFFLOAD)
663c3cb2
SH		 363 print_string(PRINT_ANY, NULL, "%s ", "offload");
364 if (flags & RTM_F_NOTIFY)
365 print_string(PRINT_ANY, NULL, "%s ", "notify");
b3ab1e68 366 if (flags & RTNH_F_LINKDOWN)
663c3cb2 367 print_string(PRINT_ANY, NULL, "%s ", "linkdown");
b3ab1e68 368 if (flags & RTNH_F_UNRESOLVED)
663c3cb2
SH		 369 print_string(PRINT_ANY, NULL, "%s ", "unresolved");
370
371 close_json_array(PRINT_JSON, NULL);
b3ab1e68
SH		 372}
373
8cfc2d47
SH		 374static void print_rt_pref(FILE *fp, unsigned int pref)
375{
8cfc2d47
SH		 376
377 switch (pref) {
378 case ICMPV6_ROUTER_PREF_LOW:
663c3cb2
SH		 379 print_string(PRINT_ANY,
380 "pref", "pref %s", "low");
8cfc2d47
SH		 381 break;
382 case ICMPV6_ROUTER_PREF_MEDIUM:
663c3cb2
SH		 383 print_string(PRINT_ANY,
384 "pref", "pref %s", "medium");
8cfc2d47
SH		 385 break;
386 case ICMPV6_ROUTER_PREF_HIGH:
663c3cb2
SH		 387 print_string(PRINT_ANY,
388 "pref", "pref %s", "high");
8cfc2d47
SH		 389 break;
390 default:
663c3cb2
SH		 391 print_uint(PRINT_ANY,
392 "pref", "%u", pref);
8cfc2d47
SH		 393 }
394}
395
1506d8d3 396static void print_rta_if(FILE *fp, const struct rtattr *rta,
663c3cb2 397 const char *prefix)
1506d8d3
SH		 398{
399 const char *ifname = ll_index_to_name(rta_getattr_u32(rta));
400
663c3cb2
SH		 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 }
1506d8d3
SH		 407}
408
daf30f6f
SH		 409static void print_cache_flags(FILE *fp, __u32 flags)
410{
663c3cb2 411 json_writer_t *jw = get_json_writer();
daf30f6f
SH		 412 flags &= ~0xFFFF;
413
663c3cb2
SH		 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 }
daf30f6f
SH		 423
424#define PRTFL(fl, flname) \
425 if (flags & RTCF_##fl) { \
426 flags &= ~RTCF_##fl; \
663c3cb2
SH		 427 if (jw) \
428 jsonw_string(jw, flname); \
429 else \
430 fprintf(fp, "%s%s", flname, flags ? "," : "> "); \
daf30f6f
SH		 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)
663c3cb2
SH		 450 print_hex(PRINT_ANY, "flags", "%x>", flags);
451
452 if (jw) {
453 jsonw_end_array(jw);
454 jsonw_destroy(&jw);
455 }
daf30f6f
SH		 456}
457
6e41810e
SH		 458static void print_rta_cacheinfo(FILE *fp, const struct rta_cacheinfo *ci)
459{
460 static int hz;
461
462 if (!hz)
463 hz = get_user_hz();
663c3cb2 464
6e41810e 465 if (ci->rta_expires != 0)
39d16a02
DA		 466 print_int(PRINT_ANY, "expires",
467 "expires %dsec ", ci->rta_expires/hz);
6e41810e 468 if (ci->rta_error != 0)
663c3cb2
SH		 469 print_uint(PRINT_ANY, "error",
470 "error %u ", ci->rta_error);
471
6e41810e
SH		 472 if (show_stats) {
473 if (ci->rta_clntref)
663c3cb2
SH		 474 print_uint(PRINT_ANY, "users",
475 "users %u ", ci->rta_clntref);
6e41810e 476 if (ci->rta_used != 0)
663c3cb2
SH		 477 print_uint(PRINT_ANY, "used",
478 "used %u ", ci->rta_used);
6e41810e 479 if (ci->rta_lastuse != 0)
663c3cb2
SH		 480 print_uint(PRINT_ANY, "age",
481 "age %usec ", ci->rta_lastuse/hz);
6e41810e
SH		 482 }
483 if (ci->rta_id)
663c3cb2
SH		 484 print_0xhex(PRINT_ANY, "ipid",
485 "ipid 0x%04x ", ci->rta_id);
486 if (ci->rta_ts || ci->rta_tsage) {
487 print_0xhex(PRINT_ANY, "ts",
488 "ts 0x%x", ci->rta_ts);
489 print_uint(PRINT_ANY, "tsage",
490 "tsage %usec ", ci->rta_tsage);
491 }
6e41810e
SH		 492}
493
5782965a
SH		 494static void print_rta_flow(FILE *fp, const struct rtattr *rta)
495{
496 __u32 to = rta_getattr_u32(rta);
497 __u32 from = to >> 16;
498 SPRINT_BUF(b1);
499
500 to &= 0xFFFF;
663c3cb2
SH		 501 if (is_json_context()) {
502 open_json_object("flow");
503
504 if (from)
505 print_string(PRINT_JSON, "from", NULL,
506 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
507 print_string(PRINT_JSON, "to", NULL,
508 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
509 close_json_object();
510 } else {
511 fprintf(fp, "realm%s ", from ? "s" : "");
512
513 if (from)
514 print_string(PRINT_FP, NULL, "%s/",
515 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
516 print_string(PRINT_FP, NULL, "%s ",
517 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
5782965a 518 }
5782965a
SH		 519}
520
a3484a9f
SH		 521static void print_rta_newdst(FILE *fp, const struct rtmsg *r,
522 const struct rtattr *rta)
523{
524 const char *newdst = format_host_rta(r->rtm_family, rta);
525
663c3cb2
SH		 526 if (is_json_context())
527 print_string(PRINT_JSON, "to", NULL, newdst);
528 else {
529 fprintf(fp, "as to ");
530 print_color_string(PRINT_FP,
531 ifa_family_color(r->rtm_family),
532 NULL, "%s ", newdst);
533 }
a3484a9f
SH		 534}
535
536static void print_rta_gateway(FILE *fp, const struct rtmsg *r,
537 const struct rtattr *rta)
538{
539 const char *gateway = format_host_rta(r->rtm_family, rta);
540
663c3cb2
SH		 541 if (is_json_context())
542 print_string(PRINT_JSON, "gateway", NULL, gateway);
543 else {
544 fprintf(fp, "via ");
545 print_color_string(PRINT_FP,
546 ifa_family_color(r->rtm_family),
547 NULL, "%s ", gateway);
548 }
a3484a9f
SH		 549}
550
551static void print_rta_via(FILE *fp, const struct rtattr *rta)
552{
663c3cb2 553 size_t len = RTA_PAYLOAD(rta) - 2;
a3484a9f 554 const struct rtvia *via = RTA_DATA(rta);
a3484a9f 555
663c3cb2
SH		 556 if (is_json_context()) {
557 open_json_object("via");
558 print_string(PRINT_JSON, "family", NULL,
559 family_name(via->rtvia_family));
560 print_string(PRINT_JSON, "host", NULL,
561 format_host(via->rtvia_family, len,
562 via->rtvia_addr));
563 close_json_object();
564 } else {
565 print_string(PRINT_FP, NULL, "via %s ",
566 family_name(via->rtvia_family));
567 print_color_string(PRINT_FP,
568 ifa_family_color(via->rtvia_family),
569 NULL, "%s ",
570 format_host(via->rtvia_family,
571 len, via->rtvia_addr));
572 }
a3484a9f
SH		 573}
574
968272e7
SH		 575static void print_rta_metrics(FILE *fp, const struct rtattr *rta)
576{
577 struct rtattr *mxrta[RTAX_MAX+1];
578 unsigned int mxlock = 0;
579 int i;
580
663c3cb2
SH		 581 open_json_array(PRINT_JSON, "metrics");
582
968272e7
SH		 583 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta));
584
585 if (mxrta[RTAX_LOCK])
586 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
587
588 for (i = 2; i <= RTAX_MAX; i++) {
589 __u32 val = 0U;
590
591 if (mxrta[i] == NULL && !(mxlock & (1 << i)))
592 continue;
593
594 if (mxrta[i] != NULL && i != RTAX_CC_ALGO)
595 val = rta_getattr_u32(mxrta[i]);
596
597 if (i == RTAX_HOPLIMIT && (int)val == -1)
598 continue;
599
663c3cb2
SH		 600 if (!is_json_context()) {
601 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
602 fprintf(fp, "%s ", mx_names[i]);
603 else
604 fprintf(fp, "metric %d ", i);
968272e7 605
663c3cb2
SH		 606 if (mxlock & (1<<i))
607 fprintf(fp, "lock ");
608 }
968272e7
SH		 609
610 switch (i) {
611 case RTAX_FEATURES:
612 print_rtax_features(fp, val);
613 break;
614 default:
615 fprintf(fp, "%u ", val);
616 break;
617
618 case RTAX_RTT:
619 case RTAX_RTTVAR:
620 case RTAX_RTO_MIN:
621 if (i == RTAX_RTT)
622 val /= 8;
623 else if (i == RTAX_RTTVAR)
624 val /= 4;
625
663c3cb2
SH		 626 if (is_json_context())
627 print_uint(PRINT_JSON, mx_names[i],
628 NULL, val);
629 else {
630 if (val >= 1000)
631 fprintf(fp, "%gs ", val/1e3);
632 else
633 fprintf(fp, "%ums ", val);
634 }
968272e7
SH		 635 break;
636 case RTAX_CC_ALGO:
663c3cb2
SH		 637 print_string(PRINT_ANY, "congestion",
638 "%s ", rta_getattr_str(mxrta[i]));
968272e7
SH		 639 break;
640 }
641 }
663c3cb2
SH		 642
643 close_json_array(PRINT_JSON, NULL);
968272e7
SH		 644}
645
f48e1488
SH		 646static void print_rta_multipath(FILE *fp, const struct rtmsg *r,
647 struct rtattr *rta)
648{
649 const struct rtnexthop *nh = RTA_DATA(rta);
650 int len = RTA_PAYLOAD(rta);
651 int first = 1;
652
c0ec7c9f 653 while (len >= sizeof(*nh)) {
f48e1488
SH		 654 struct rtattr *tb[RTA_MAX + 1];
655
656 if (nh->rtnh_len > len)
657 break;
658
663c3cb2
SH		 659 if (!is_json_context()) {
660 if ((r->rtm_flags & RTM_F_CLONED) &&
661 r->rtm_type == RTN_MULTICAST) {
662 if (first) {
663 fprintf(fp, "Oifs: ");
664 first = 0;
665 } else {
666 fprintf(fp, " ");
667 }
668 } else
669 fprintf(fp, "%s\tnexthop ", _SL_);
670 }
f48e1488
SH		 671
672 if (nh->rtnh_len > sizeof(*nh)) {
673 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh),
674 nh->rtnh_len - sizeof(*nh));
675
676 if (tb[RTA_ENCAP])
677 lwt_print_encap(fp,
678 tb[RTA_ENCAP_TYPE],
679 tb[RTA_ENCAP]);
680 if (tb[RTA_NEWDST])
681 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
682 if (tb[RTA_GATEWAY])
683 print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
684 if (tb[RTA_VIA])
685 print_rta_via(fp, tb[RTA_VIA]);
686 if (tb[RTA_FLOW])
687 print_rta_flow(fp, tb[RTA_FLOW]);
688 }
689
80d1c528
SH		 690 if ((r->rtm_flags & RTM_F_CLONED) &&
691 r->rtm_type == RTN_MULTICAST) {
f48e1488
SH		 692 fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
693 if (nh->rtnh_hops != 1)
694 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
695 fprintf(fp, " ");
696 } else {
663c3cb2 697 fprintf(fp, "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
f48e1488
SH		 698 if (r->rtm_family != AF_MPLS)
699 fprintf(fp, "weight %d ",
700 nh->rtnh_hops+1);
701 }
702
703 print_rt_flags(fp, nh->rtnh_flags);
704
705 len -= NLMSG_ALIGN(nh->rtnh_len);
706 nh = RTNH_NEXT(nh);
707 }
708}
709
f4ff11e3
DS		 710int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
711{
56f5daac 712 FILE *fp = (FILE *)arg;
f4ff11e3
DS		 713 struct rtmsg *r = NLMSG_DATA(n);
714 int len = n->nlmsg_len;
56f5daac 715 struct rtattr *tb[RTA_MAX+1];
663c3cb2 716 int family, color, host_len;
f4ff11e3 717 __u32 table;
2f406f2d 718 int ret;
56f5daac 719
f4ff11e3 720 SPRINT_BUF(b1);
f4ff11e3
DS		 721
722 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
723 fprintf(stderr, "Not a route: %08x %08x %08x\n",
724 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
ba7b9777 725 return -1;
f4ff11e3
DS		 726 }
727 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
728 return 0;
729 len -= NLMSG_LENGTH(sizeof(*r));
730 if (len < 0) {
731 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
732 return -1;
733 }
734
f3a2ddc1 735 host_len = af_bit_len(r->rtm_family);
f4ff11e3
DS		 736
737 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
738 table = rtm_get_table(r, tb);
739
740 if (!filter_nlmsg(n, tb, host_len))
741 return 0;
742
aba5acdf
SH		 743 if (filter.flushb) {
744 struct nlmsghdr *fn;
56f5daac 745
aba5acdf 746 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
cc560825
SH		 747 ret = flush_update();
748 if (ret < 0)
2f406f2d 749 return ret;
aba5acdf 750 }
56f5daac 751 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
aba5acdf
SH		 752 memcpy(fn, n, n->nlmsg_len);
753 fn->nlmsg_type = RTM_DELROUTE;
754 fn->nlmsg_flags = NLM_F_REQUEST;
351efcde 755 fn->nlmsg_seq = ++rth.seq;
56f5daac 756 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
aba5acdf
SH		 757 filter.flushed++;
758 if (show_stats < 2)
759 return 0;
760 }
761
663c3cb2 762 open_json_object(NULL);
aba5acdf 763 if (n->nlmsg_type == RTM_DELROUTE)
663c3cb2
SH		 764 print_bool(PRINT_ANY, "deleted", "Deleted ", true);
765
d84b1878
DA		 766 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
767 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
663c3cb2
SH		 768 print_string(PRINT_ANY, NULL, "%s ",
769 rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
aba5acdf 770
663c3cb2 771 color = COLOR_NONE;
aba5acdf 772 if (tb[RTA_DST]) {
56e3eb4c 773 family = get_real_family(r->rtm_type, r->rtm_family);
663c3cb2
SH		 774 color = ifa_family_color(family);
775
aba5acdf 776 if (r->rtm_dst_len != host_len) {
663c3cb2
SH		 777 snprintf(b1, sizeof(b1),
778 "%s/%u", rt_addr_n2a_rta(family, tb[RTA_DST]),
779 r->rtm_dst_len);
aba5acdf 780 } else {
663c3cb2
SH		 781 format_host_rta_r(family, tb[RTA_DST],
782 b1, sizeof(b1));
783
aba5acdf
SH		 784 }
785 } else if (r->rtm_dst_len) {
663c3cb2 786 snprintf(b1, sizeof(b1), "0/%d ", r->rtm_dst_len);
aba5acdf 787 } else {
663c3cb2 788 strncpy(b1, "default", sizeof(b1));
aba5acdf 789 }
663c3cb2
SH		 790 print_color_string(PRINT_ANY, color,
791 "dst", "%s ", b1);
792
aba5acdf 793 if (tb[RTA_SRC]) {
56e3eb4c 794 family = get_real_family(r->rtm_type, r->rtm_family);
663c3cb2
SH		 795 color = ifa_family_color(family);
796
aba5acdf 797 if (r->rtm_src_len != host_len) {
663c3cb2
SH		 798 snprintf(b1, sizeof(b1),
799 "%s/%u",
800 rt_addr_n2a_rta(family, tb[RTA_SRC]),
801 r->rtm_src_len);
aba5acdf 802 } else {
663c3cb2
SH		 803 format_host_rta_r(family, tb[RTA_SRC],
804 b1, sizeof(b1));
aba5acdf 805 }
663c3cb2
SH		 806 print_color_string(PRINT_ANY, color,
807 "from", "from %s ", b1);
aba5acdf 808 } else if (r->rtm_src_len) {
663c3cb2
SH		 809 snprintf(b1, sizeof(b1), "0/%u", r->rtm_src_len);
810
811 print_string(PRINT_ANY, "src", "from %s ", b1);
aba5acdf 812 }
a3484a9f
SH		 813
814 if (tb[RTA_NEWDST])
815 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
1e529305
RP		 816
817 if (tb[RTA_ENCAP])
818 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
819
aba5acdf 820 if (r->rtm_tos && filter.tosmask != -1) {
663c3cb2
SH		 821 print_string(PRINT_ANY, "tos", "tos %s ",
822 rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
aba5acdf 823 }
02d2ae55 824
a3484a9f
SH		 825 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len)
826 print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
827
828 if (tb[RTA_VIA])
829 print_rta_via(fp, tb[RTA_VIA]);
56f5daac 830
aba5acdf 831 if (tb[RTA_OIF] && filter.oifmask != -1)
663c3cb2 832 print_rta_if(fp, tb[RTA_OIF], "dev");
aba5acdf 833
bc234301 834 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
663c3cb2
SH		 835 print_string(PRINT_ANY,
836 "table", "table %s ",
837 rtnl_rttable_n2a(table, b1, sizeof(b1)));
838
80d1c528 839 if (!(r->rtm_flags & RTM_F_CLONED)) {
663c3cb2
SH		 840 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) &&
841 filter.protocolmask != -1)
842 print_string(PRINT_ANY,
843 "protocol", "proto %s ",
844 rtnl_rtprot_n2a(r->rtm_protocol,
845 b1, sizeof(b1)));
846
847 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) &&
848 filter.scopemask != -1)
849 print_string(PRINT_ANY,
850 "scope", "scope %s ",
851 rtnl_rtscope_n2a(r->rtm_scope,
852 b1, sizeof(b1)));
aba5acdf 853 }
663c3cb2 854
aba5acdf 855 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
663c3cb2
SH		 856 const char *psrc
857 = rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]);
858
aba5acdf
SH		 859 /* Do not use format_host(). It is our local addr
860 and symbolic name will not be useful.
663c3cb2
SH		 861 */
862 if (is_json_context())
863 print_string(PRINT_JSON, "prefsrc", NULL, psrc);
864 else {
865 fprintf(fp, "src ");
866 print_color_string(PRINT_FP,
867 ifa_family_color(r->rtm_family),
868 NULL, "%s ", psrc);
869 }
870
aba5acdf 871 }
663c3cb2 872
ed7fdc95 873 if (tb[RTA_PRIORITY] && filter.metricmask != -1)
663c3cb2
SH		 874 print_uint(PRINT_ANY, "metric", "metric %u ",
875 rta_getattr_u32(tb[RTA_PRIORITY]));
b3ab1e68
SH		 876
877 print_rt_flags(fp, r->rtm_flags);
878
b0373bfb 879 if (tb[RTA_MARK]) {
9f1370c0 880 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
56f5daac 881
b0373bfb 882 if (mark) {
663c3cb2
SH		 883 if (is_json_context())
884 print_uint(PRINT_JSON, "mark", NULL, mark);
885 else if (mark >= 16)
886 print_0xhex(PRINT_FP, NULL,
887 "mark 0x%x ", mark);
b0373bfb 888 else
663c3cb2
SH		 889 print_uint(PRINT_FP, NULL,
890 "mark %u ", mark);
b0373bfb
ED		 891 }
892 }
aba5acdf 893
5782965a
SH		 894 if (tb[RTA_FLOW] && filter.realmmask != ~0U)
895 print_rta_flow(fp, tb[RTA_FLOW]);
82252cdc
LC		 896
897 if (tb[RTA_UID])
663c3cb2
SH		 898 print_uint(PRINT_ANY, "uid", "uid %u ",
899 rta_getattr_u32(tb[RTA_UID]));
daf30f6f 900
663c3cb2 901 if (r->rtm_family == AF_INET) {
9107c425 902 if (r->rtm_flags & RTM_F_CLONED)
663c3cb2 903 print_cache_flags(fp, r->rtm_flags);
6e41810e 904
9107c425
DA		 905 if (tb[RTA_CACHEINFO])
906 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
aba5acdf 907 } else if (r->rtm_family == AF_INET6) {
9107c425
DA		 908 if (tb[RTA_CACHEINFO])
909 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
aba5acdf 910 }
6e41810e 911
968272e7
SH		 912 if (tb[RTA_METRICS])
913 print_rta_metrics(fp, tb[RTA_METRICS]);
aba5acdf 914
1506d8d3
SH		 915 if (tb[RTA_IIF] && filter.iifmask != -1)
916 print_rta_if(fp, tb[RTA_IIF], "iif");
b3ab1e68 917
f48e1488
SH		 918 if (tb[RTA_MULTIPATH])
919 print_rta_multipath(fp, r, tb[RTA_MULTIPATH]);
8cfc2d47
SH		 920
921 if (tb[RTA_PREF])
922 print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));
923
c44d18ea 924 if (tb[RTA_TTL_PROPAGATE]) {
663c3cb2
SH		 925 bool propogate = rta_getattr_u8(tb[RTA_TTL_PROPAGATE]);
926
927 if (is_json_context())
928 print_bool(PRINT_JSON, "ttl-propogate", NULL,
929 propogate);
c44d18ea 930 else
663c3cb2
SH		 931 print_string(PRINT_FP, NULL,
932 "ttl-propogate %s",
933 propogate ? "enabled" : "disabled");
c44d18ea 934 }
663c3cb2
SH		 935
936 print_string(PRINT_FP, NULL, "\n", NULL);
937 close_json_object();
aba5acdf
SH		 938 fflush(fp);
939 return 0;
940}
941
1e529305
RP		 942static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
943 struct rtattr *rta, struct rtnexthop *rtnh,
d1f28cf1 944 int *argcp, char ***argvp)
aba5acdf
SH		 945{
946 int argc = *argcp;
947 char **argv = *argvp;
948
949 while (++argv, --argc > 0) {
950 if (strcmp(*argv, "via") == 0) {
4d6c3796 951 inet_prefix addr;
93ae2835 952 int family;
56f5daac 953
aba5acdf 954 NEXT_ARG();
93ae2835
EB		 955 family = read_family(*argv);
956 if (family == AF_UNSPEC)
957 family = r->rtm_family;
958 else
959 NEXT_ARG();
960 get_addr(&addr, *argv, family);
4d6c3796
VB		 961 if (r->rtm_family == AF_UNSPEC)
962 r->rtm_family = addr.family;
93ae2835
EB		 963 if (addr.family == r->rtm_family) {
964 rta_addattr_l(rta, 4096, RTA_GATEWAY, &addr.data, addr.bytelen);
965 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
966 } else {
967 rta_addattr_l(rta, 4096, RTA_VIA, &addr.family, addr.bytelen+2);
ecc509f9 968 rtnh->rtnh_len += RTA_SPACE(addr.bytelen+2);
93ae2835 969 }
aba5acdf
SH		 970 } else if (strcmp(*argv, "dev") == 0) {
971 NEXT_ARG();
cc560825 972 rtnh->rtnh_ifindex = ll_name_to_index(*argv);
fe99adbc
SP		 973 if (!rtnh->rtnh_ifindex)
974 return nodev(*argv);
aba5acdf 975 } else if (strcmp(*argv, "weight") == 0) {
56f5daac
SH		 976 unsigned int w;
977
aba5acdf
SH		 978 NEXT_ARG();
979 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
980 invarg("\"weight\" is invalid\n", *argv);
981 rtnh->rtnh_hops = w - 1;
982 } else if (strcmp(*argv, "onlink") == 0) {
983 rtnh->rtnh_flags |= RTNH_F_ONLINK;
f4f6d640
PM		 984 } else if (matches(*argv, "realms") == 0) {
985 __u32 realm;
56f5daac 986
f4f6d640 987 NEXT_ARG();
d583e88e 988 if (get_rt_realms_or_raw(&realm, *argv))
f4f6d640
PM		 989 invarg("\"realm\" value is invalid\n", *argv);
990 rta_addattr32(rta, 4096, RTA_FLOW, realm);
991 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
1e529305
RP		 992 } else if (strcmp(*argv, "encap") == 0) {
993 int len = rta->rta_len;
994
995 lwt_parse_encap(rta, 4096, &argc, &argv);
996 rtnh->rtnh_len += rta->rta_len - len;
ecc509f9
RP		 997 } else if (strcmp(*argv, "as") == 0) {
998 inet_prefix addr;
999
1000 NEXT_ARG();
1001 if (strcmp(*argv, "to") == 0)
1002 NEXT_ARG();
1003 get_addr(&addr, *argv, r->rtm_family);
1004 rta_addattr_l(rta, 4096, RTA_NEWDST, &addr.data,
1005 addr.bytelen);
1006 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
aba5acdf
SH		 1007 } else
1008 break;
1009 }
1010 *argcp = argc;
1011 *argvp = argv;
1012 return 0;
1013}
1014
d1f28cf1
SH		 1015static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
1016 int argc, char **argv)
aba5acdf
SH		 1017{
1018 char buf[1024];
56f5daac 1019 struct rtattr *rta = (void *)buf;
aba5acdf
SH		 1020 struct rtnexthop *rtnh;
1021
1022 rta->rta_type = RTA_MULTIPATH;
1023 rta->rta_len = RTA_LENGTH(0);
1024 rtnh = RTA_DATA(rta);
1025
1026 while (argc > 0) {
1027 if (strcmp(*argv, "nexthop") != 0) {
1028 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
1029 exit(-1);
1030 }
1031 if (argc <= 1) {
1032 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
1033 exit(-1);
1034 }
1035 memset(rtnh, 0, sizeof(*rtnh));
1036 rtnh->rtnh_len = sizeof(*rtnh);
1037 rta->rta_len += rtnh->rtnh_len;
ee53b42f
JS		 1038 if (parse_one_nh(n, r, rta, rtnh, &argc, &argv)) {
1039 fprintf(stderr, "Error: cannot parse nexthop\n");
1040 exit(-1);
1041 }
aba5acdf
SH		 1042 rtnh = RTNH_NEXT(rtnh);
1043 }
1044
1045 if (rta->rta_len > RTA_LENGTH(0))
1046 addattr_l(n, 1024, RTA_MULTIPATH, RTA_DATA(rta), RTA_PAYLOAD(rta));
1047 return 0;
1048}
1049
56f5daac 1050static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
aba5acdf 1051{
aba5acdf 1052 struct {
4806867a
SH		 1053 struct nlmsghdr n;
1054 struct rtmsg r;
56f5daac 1055 char buf[1024];
d17b136f
PS		 1056 } req = {
1057 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1058 .n.nlmsg_flags = NLM_F_REQUEST | flags,
1059 .n.nlmsg_type = cmd,
1060 .r.rtm_family = preferred_family,
1061 .r.rtm_table = RT_TABLE_MAIN,
1062 .r.rtm_scope = RT_SCOPE_NOWHERE,
1063 };
aba5acdf 1064 char mxbuf[256];
56f5daac
SH		 1065 struct rtattr *mxrta = (void *)mxbuf;
1066 unsigned int mxlock = 0;
aba5acdf
SH		 1067 char *d = NULL;
1068 int gw_ok = 0;
1069 int dst_ok = 0;
1070 int nhs_ok = 0;
1071 int scope_ok = 0;
1072 int table_ok = 0;
54e0b2e7 1073 int raw = 0;
f638e9f7 1074 int type_ok = 0;
aba5acdf 1075
aba5acdf
SH		 1076 if (cmd != RTM_DELROUTE) {
1077 req.r.rtm_protocol = RTPROT_BOOT;
1078 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1079 req.r.rtm_type = RTN_UNICAST;
1080 }
1081
1082 mxrta->rta_type = RTA_METRICS;
1083 mxrta->rta_len = RTA_LENGTH(0);
1084
1085 while (argc > 0) {
1086 if (strcmp(*argv, "src") == 0) {
1087 inet_prefix addr;
56f5daac 1088
aba5acdf
SH		 1089 NEXT_ARG();
1090 get_addr(&addr, *argv, req.r.rtm_family);
1091 if (req.r.rtm_family == AF_UNSPEC)
1092 req.r.rtm_family = addr.family;
21fef525
SH		 1093 addattr_l(&req.n, sizeof(req),
1094 RTA_PREFSRC, &addr.data, addr.bytelen);
6f7a9f4d
EB		 1095 } else if (strcmp(*argv, "as") == 0) {
1096 inet_prefix addr;
56f5daac 1097
6f7a9f4d
EB		 1098 NEXT_ARG();
1099 if (strcmp(*argv, "to") == 0) {
1100 NEXT_ARG();
1101 }
1102 get_addr(&addr, *argv, req.r.rtm_family);
1103 if (req.r.rtm_family == AF_UNSPEC)
1104 req.r.rtm_family = addr.family;
21fef525
SH		 1105 addattr_l(&req.n, sizeof(req),
1106 RTA_NEWDST, &addr.data, addr.bytelen);
aba5acdf
SH		 1107 } else if (strcmp(*argv, "via") == 0) {
1108 inet_prefix addr;
93ae2835 1109 int family;
56f5daac 1110
11f2c753
DA		 1111 if (gw_ok) {
1112 invarg("use nexthop syntax to specify multiple via\n",
1113 *argv);
1114 }
aba5acdf
SH		 1115 gw_ok = 1;
1116 NEXT_ARG();
93ae2835
EB		 1117 family = read_family(*argv);
1118 if (family == AF_UNSPEC)
1119 family = req.r.rtm_family;
1120 else
1121 NEXT_ARG();
1122 get_addr(&addr, *argv, family);
aba5acdf
SH		 1123 if (req.r.rtm_family == AF_UNSPEC)
1124 req.r.rtm_family = addr.family;
93ae2835 1125 if (addr.family == req.r.rtm_family)
ecc509f9
RP		 1126 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
1127 &addr.data, addr.bytelen);
93ae2835 1128 else
ecc509f9
RP		 1129 addattr_l(&req.n, sizeof(req), RTA_VIA,
1130 &addr.family, addr.bytelen+2);
aba5acdf
SH		 1131 } else if (strcmp(*argv, "from") == 0) {
1132 inet_prefix addr;
56f5daac 1133
aba5acdf
SH		 1134 NEXT_ARG();
1135 get_prefix(&addr, *argv, req.r.rtm_family);
1136 if (req.r.rtm_family == AF_UNSPEC)
1137 req.r.rtm_family = addr.family;
1138 if (addr.bytelen)
1139 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1140 req.r.rtm_src_len = addr.bitlen;
1141 } else if (strcmp(*argv, "tos") == 0 ||
1142 matches(*argv, "dsfield") == 0) {
1143 __u32 tos;
56f5daac 1144
aba5acdf
SH		 1145 NEXT_ARG();
1146 if (rtnl_dsfield_a2n(&tos, *argv))
1147 invarg("\"tos\" value is invalid\n", *argv);
1148 req.r.rtm_tos = tos;
56f5daac 1149 } else if (strcmp(*argv, "expires") == 0) {
68eede25 1150 __u32 expires;
56f5daac 1151
68eede25
HL		 1152 NEXT_ARG();
1153 if (get_u32(&expires, *argv, 0))
1154 invarg("\"expires\" value is invalid\n", *argv);
eecc0069 1155 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
aba5acdf
SH		 1156 } else if (matches(*argv, "metric") == 0 ||
1157 matches(*argv, "priority") == 0 ||
194e9b85 1158 strcmp(*argv, "preference") == 0) {
aba5acdf 1159 __u32 metric;
56f5daac 1160
aba5acdf
SH		 1161 NEXT_ARG();
1162 if (get_u32(&metric, *argv, 0))
1163 invarg("\"metric\" value is invalid\n", *argv);
1164 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
1165 } else if (strcmp(*argv, "scope") == 0) {
f332d169 1166 __u32 scope = 0;
56f5daac 1167
aba5acdf
SH		 1168 NEXT_ARG();
1169 if (rtnl_rtscope_a2n(&scope, *argv))
1170 invarg("invalid \"scope\" value\n", *argv);
1171 req.r.rtm_scope = scope;
1172 scope_ok = 1;
1173 } else if (strcmp(*argv, "mtu") == 0) {
56f5daac
SH		 1174 unsigned int mtu;
1175
aba5acdf
SH		 1176 NEXT_ARG();
1177 if (strcmp(*argv, "lock") == 0) {
1178 mxlock |= (1<<RTAX_MTU);
1179 NEXT_ARG();
1180 }
1181 if (get_unsigned(&mtu, *argv, 0))
1182 invarg("\"mtu\" value is invalid\n", *argv);
1183 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
71e58151 1184 } else if (strcmp(*argv, "hoplimit") == 0) {
56f5daac
SH		 1185 unsigned int hoplimit;
1186
71e58151
GBY		 1187 NEXT_ARG();
1188 if (strcmp(*argv, "lock") == 0) {
1189 mxlock |= (1<<RTAX_HOPLIMIT);
1190 NEXT_ARG();
1191 }
ea6cbab7 1192 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
71e58151
GBY		 1193 invarg("\"hoplimit\" value is invalid\n", *argv);
1194 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
aba5acdf 1195 } else if (strcmp(*argv, "advmss") == 0) {
56f5daac
SH		 1196 unsigned int mss;
1197
aba5acdf
SH		 1198 NEXT_ARG();
1199 if (strcmp(*argv, "lock") == 0) {
1200 mxlock |= (1<<RTAX_ADVMSS);
1201 NEXT_ARG();
1202 }
1203 if (get_unsigned(&mss, *argv, 0))
1204 invarg("\"mss\" value is invalid\n", *argv);
1205 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
aba5acdf 1206 } else if (matches(*argv, "reordering") == 0) {
56f5daac
SH		 1207 unsigned int reord;
1208
aba5acdf
SH		 1209 NEXT_ARG();
1210 if (strcmp(*argv, "lock") == 0) {
1211 mxlock |= (1<<RTAX_REORDERING);
1212 NEXT_ARG();
1213 }
1214 if (get_unsigned(&reord, *argv, 0))
1215 invarg("\"reordering\" value is invalid\n", *argv);
1216 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
aba5acdf 1217 } else if (strcmp(*argv, "rtt") == 0) {
56f5daac
SH		 1218 unsigned int rtt;
1219
aba5acdf
SH		 1220 NEXT_ARG();
1221 if (strcmp(*argv, "lock") == 0) {
1222 mxlock |= (1<<RTAX_RTT);
1223 NEXT_ARG();
1224 }
81d03dc3 1225 if (get_time_rtt(&rtt, *argv, &raw))
aba5acdf 1226 invarg("\"rtt\" value is invalid\n", *argv);
0612519e 1227 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
54e0b2e7
RJ		 1228 (raw) ? rtt : rtt * 8);
1229 } else if (strcmp(*argv, "rto_min") == 0) {
56f5daac
SH		 1230 unsigned int rto_min;
1231
54e0b2e7
RJ		 1232 NEXT_ARG();
1233 mxlock |= (1<<RTAX_RTO_MIN);
81d03dc3 1234 if (get_time_rtt(&rto_min, *argv, &raw))
54e0b2e7
RJ		 1235 invarg("\"rto_min\" value is invalid\n",
1236 *argv);
1237 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1238 rto_min);
aba5acdf 1239 } else if (matches(*argv, "window") == 0) {
56f5daac
SH		 1240 unsigned int win;
1241
aba5acdf
SH		 1242 NEXT_ARG();
1243 if (strcmp(*argv, "lock") == 0) {
1244 mxlock |= (1<<RTAX_WINDOW);
1245 NEXT_ARG();
1246 }
1247 if (get_unsigned(&win, *argv, 0))
1248 invarg("\"window\" value is invalid\n", *argv);
1249 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1250 } else if (matches(*argv, "cwnd") == 0) {
56f5daac
SH		 1251 unsigned int win;
1252
aba5acdf
SH		 1253 NEXT_ARG();
1254 if (strcmp(*argv, "lock") == 0) {
1255 mxlock |= (1<<RTAX_CWND);
1256 NEXT_ARG();
1257 }
1258 if (get_unsigned(&win, *argv, 0))
1259 invarg("\"cwnd\" value is invalid\n", *argv);
1260 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
a1f1143e 1261 } else if (matches(*argv, "initcwnd") == 0) {
56f5daac
SH		 1262 unsigned int win;
1263
a1f1143e
VW		 1264 NEXT_ARG();
1265 if (strcmp(*argv, "lock") == 0) {
1266 mxlock |= (1<<RTAX_INITCWND);
1267 NEXT_ARG();
1268 }
1269 if (get_unsigned(&win, *argv, 0))
1270 invarg("\"initcwnd\" value is invalid\n", *argv);
21fef525
SH		 1271 rta_addattr32(mxrta, sizeof(mxbuf),
1272 RTAX_INITCWND, win);
f5fd8003 1273 } else if (matches(*argv, "initrwnd") == 0) {
56f5daac
SH		 1274 unsigned int win;
1275
f5fd8003 1276 NEXT_ARG();
1277 if (strcmp(*argv, "lock") == 0) {
1278 mxlock |= (1<<RTAX_INITRWND);
1279 NEXT_ARG();
1280 }
1281 if (get_unsigned(&win, *argv, 0))
1282 invarg("\"initrwnd\" value is invalid\n", *argv);
21fef525
SH		 1283 rta_addattr32(mxrta, sizeof(mxbuf),
1284 RTAX_INITRWND, win);
29d1f730
FW		 1285 } else if (matches(*argv, "features") == 0) {
1286 unsigned int features = 0;
1287
1288 while (argc > 0) {
1289 NEXT_ARG();
1290
1291 if (strcmp(*argv, "ecn") == 0)
1292 features |= RTAX_FEATURE_ECN;
1293 else
1294 invarg("\"features\" value not valid\n", *argv);
1295 break;
1296 }
1297
21fef525
SH		 1298 rta_addattr32(mxrta, sizeof(mxbuf),
1299 RTAX_FEATURES, features);
b37f2c89 1300 } else if (matches(*argv, "quickack") == 0) {
56f5daac
SH		 1301 unsigned int quickack;
1302
b37f2c89
CW		 1303 NEXT_ARG();
1304 if (get_unsigned(&quickack, *argv, 0))
1305 invarg("\"quickack\" value is invalid\n", *argv);
1306 if (quickack != 1 && quickack != 0)
1307 invarg("\"quickack\" value should be 0 or 1\n", *argv);
21fef525
SH		 1308 rta_addattr32(mxrta, sizeof(mxbuf),
1309 RTAX_QUICKACK, quickack);
6ef87f9c
DB		 1310 } else if (matches(*argv, "congctl") == 0) {
1311 NEXT_ARG();
1312 if (strcmp(*argv, "lock") == 0) {
1313 mxlock |= 1 << RTAX_CC_ALGO;
1314 NEXT_ARG();
1315 }
1316 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1317 strlen(*argv));
aba5acdf 1318 } else if (matches(*argv, "rttvar") == 0) {
56f5daac
SH		 1319 unsigned int win;
1320
aba5acdf
SH		 1321 NEXT_ARG();
1322 if (strcmp(*argv, "lock") == 0) {
1323 mxlock |= (1<<RTAX_RTTVAR);
1324 NEXT_ARG();
1325 }
81d03dc3 1326 if (get_time_rtt(&win, *argv, &raw))
aba5acdf 1327 invarg("\"rttvar\" value is invalid\n", *argv);
54e0b2e7
RJ		 1328 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1329 (raw) ? win : win * 4);
aba5acdf 1330 } else if (matches(*argv, "ssthresh") == 0) {
56f5daac
SH		 1331 unsigned int win;
1332
aba5acdf
SH		 1333 NEXT_ARG();
1334 if (strcmp(*argv, "lock") == 0) {
1335 mxlock |= (1<<RTAX_SSTHRESH);
1336 NEXT_ARG();
1337 }
1338 if (get_unsigned(&win, *argv, 0))
1339 invarg("\"ssthresh\" value is invalid\n", *argv);
1340 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1341 } else if (matches(*argv, "realms") == 0) {
1342 __u32 realm;
56f5daac 1343
aba5acdf 1344 NEXT_ARG();
d583e88e 1345 if (get_rt_realms_or_raw(&realm, *argv))
aba5acdf
SH		 1346 invarg("\"realm\" value is invalid\n", *argv);
1347 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1348 } else if (strcmp(*argv, "onlink") == 0) {
1349 req.r.rtm_flags |= RTNH_F_ONLINK;
aba5acdf
SH		 1350 } else if (strcmp(*argv, "nexthop") == 0) {
1351 nhs_ok = 1;
1352 break;
1353 } else if (matches(*argv, "protocol") == 0) {
f332d169 1354 __u32 prot;
56f5daac 1355
aba5acdf
SH		 1356 NEXT_ARG();
1357 if (rtnl_rtprot_a2n(&prot, *argv))
1358 invarg("\"protocol\" value is invalid\n", *argv);
1359 req.r.rtm_protocol = prot;
aba5acdf 1360 } else if (matches(*argv, "table") == 0) {
f332d169 1361 __u32 tid;
56f5daac 1362
aba5acdf
SH		 1363 NEXT_ARG();
1364 if (rtnl_rttable_a2n(&tid, *argv))
1365 invarg("\"table\" value is invalid\n", *argv);
34e95647
PM		 1366 if (tid < 256)
1367 req.r.rtm_table = tid;
1368 else {
1369 req.r.rtm_table = RT_TABLE_UNSPEC;
1370 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1371 }
aba5acdf 1372 table_ok = 1;
0130f012
DA		 1373 } else if (matches(*argv, "vrf") == 0) {
1374 __u32 tid;
1375
1376 NEXT_ARG();
1377 tid = ipvrf_get_table(*argv);
1378 if (tid == 0)
1379 invarg("Invalid VRF\n", *argv);
1380 if (tid < 256)
1381 req.r.rtm_table = tid;
1382 else {
1383 req.r.rtm_table = RT_TABLE_UNSPEC;
1384 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1385 }
1386 table_ok = 1;
aba5acdf
SH		 1387 } else if (strcmp(*argv, "dev") == 0 ||
1388 strcmp(*argv, "oif") == 0) {
1389 NEXT_ARG();
1390 d = *argv;
194e9b85
LR		 1391 } else if (matches(*argv, "pref") == 0) {
1392 __u8 pref;
56f5daac 1393
194e9b85
LR		 1394 NEXT_ARG();
1395 if (strcmp(*argv, "low") == 0)
1396 pref = ICMPV6_ROUTER_PREF_LOW;
1397 else if (strcmp(*argv, "medium") == 0)
1398 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1399 else if (strcmp(*argv, "high") == 0)
1400 pref = ICMPV6_ROUTER_PREF_HIGH;
1401 else if (get_u8(&pref, *argv, 0))
1402 invarg("\"pref\" value is invalid\n", *argv);
1403 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1e529305
RP		 1404 } else if (strcmp(*argv, "encap") == 0) {
1405 char buf[1024];
56f5daac 1406 struct rtattr *rta = (void *)buf;
1e529305
RP		 1407
1408 rta->rta_type = RTA_ENCAP;
1409 rta->rta_len = RTA_LENGTH(0);
1410
1411 lwt_parse_encap(rta, sizeof(buf), &argc, &argv);
1412
1413 if (rta->rta_len > RTA_LENGTH(0))
21fef525
SH		 1414 addraw_l(&req.n, 1024
1415 , RTA_DATA(rta), RTA_PAYLOAD(rta));
c44d18ea
RS		 1416 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1417 __u8 ttl_prop;
1418
1419 NEXT_ARG();
1420 if (matches(*argv, "enabled") == 0)
1421 ttl_prop = 1;
1422 else if (matches(*argv, "disabled") == 0)
1423 ttl_prop = 0;
1424 else
1425 invarg("\"ttl-propagate\" value is invalid\n",
1426 *argv);
1427
1428 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1429 ttl_prop);
e54ed380
CP		 1430 } else if (matches(*argv, "fastopen_no_cookie") == 0) {
1431 unsigned int fastopen_no_cookie;
1432
1433 NEXT_ARG();
1434 if (get_unsigned(&fastopen_no_cookie, *argv, 0))
1435 invarg("\"fastopen_no_cookie\" value is invalid\n", *argv);
1436 if (fastopen_no_cookie != 1 && fastopen_no_cookie != 0)
1437 invarg("\"fastopen_no_cookie\" value should be 0 or 1\n", *argv);
1438 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FASTOPEN_NO_COOKIE, fastopen_no_cookie);
aba5acdf
SH		 1439 } else {
1440 int type;
1441 inet_prefix dst;
1442
1443 if (strcmp(*argv, "to") == 0) {
1444 NEXT_ARG();
1445 }
1446 if ((**argv < '0' || **argv > '9') &&
1447 rtnl_rtntype_a2n(&type, *argv) == 0) {
1448 NEXT_ARG();
1449 req.r.rtm_type = type;
f638e9f7 1450 type_ok = 1;
aba5acdf
SH		 1451 }
1452
1453 if (matches(*argv, "help") == 0)
1454 usage();
1455 if (dst_ok)
1456 duparg2("to", *argv);
1457 get_prefix(&dst, *argv, req.r.rtm_family);
1458 if (req.r.rtm_family == AF_UNSPEC)
1459 req.r.rtm_family = dst.family;
1460 req.r.rtm_dst_len = dst.bitlen;
1461 dst_ok = 1;
1462 if (dst.bytelen)
21fef525
SH		 1463 addattr_l(&req.n, sizeof(req),
1464 RTA_DST, &dst.data, dst.bytelen);
aba5acdf
SH		 1465 }
1466 argc--; argv++;
1467 }
1468
922b4822
PS		 1469 if (!dst_ok)
1470 usage();
1471
7b201d60 1472 if (d) {
cc560825 1473 int idx = ll_name_to_index(d);
aba5acdf 1474
fe99adbc
SP		 1475 if (!idx)
1476 return nodev(d);
7b201d60 1477 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
aba5acdf
SH		 1478 }
1479
1480 if (mxrta->rta_len > RTA_LENGTH(0)) {
1481 if (mxlock)
1482 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1483 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1484 }
1485
1486 if (nhs_ok)
1487 parse_nexthops(&req.n, &req.r, argc, argv);
1488
f638e9f7
RP		 1489 if (req.r.rtm_family == AF_UNSPEC)
1490 req.r.rtm_family = AF_INET;
1491
aba5acdf
SH		 1492 if (!table_ok) {
1493 if (req.r.rtm_type == RTN_LOCAL ||
1494 req.r.rtm_type == RTN_BROADCAST ||
1495 req.r.rtm_type == RTN_NAT ||
1496 req.r.rtm_type == RTN_ANYCAST)
1497 req.r.rtm_table = RT_TABLE_LOCAL;
1498 }
1499 if (!scope_ok) {
f638e9f7
RP		 1500 if (req.r.rtm_family == AF_INET6 ||
1501 req.r.rtm_family == AF_MPLS)
1502 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1503 else if (req.r.rtm_type == RTN_LOCAL ||
1504 req.r.rtm_type == RTN_NAT)
aba5acdf
SH		 1505 req.r.rtm_scope = RT_SCOPE_HOST;
1506 else if (req.r.rtm_type == RTN_BROADCAST ||
1507 req.r.rtm_type == RTN_MULTICAST ||
1508 req.r.rtm_type == RTN_ANYCAST)
1509 req.r.rtm_scope = RT_SCOPE_LINK;
1510 else if (req.r.rtm_type == RTN_UNICAST ||
1511 req.r.rtm_type == RTN_UNSPEC) {
1512 if (cmd == RTM_DELROUTE)
1513 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1514 else if (!gw_ok && !nhs_ok)
1515 req.r.rtm_scope = RT_SCOPE_LINK;
1516 }
1517 }
1518
f638e9f7
RP		 1519 if (!type_ok && req.r.rtm_family == AF_MPLS)
1520 req.r.rtm_type = RTN_UNICAST;
aba5acdf 1521
86bf43c7 1522 if (rtnl_talk(&rth, &req.n, NULL) < 0)
d58ba4ba 1523 return -2;
aba5acdf
SH		 1524
1525 return 0;
1526}
1527
1528static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
1529{
1530 struct {
1531 struct nlmsghdr nlh;
1532 struct rtmsg rtm;
d17b136f
PS		 1533 } req = {
1534 .nlh.nlmsg_len = sizeof(req),
1535 .nlh.nlmsg_type = RTM_GETROUTE,
1536 .nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST,
1537 .nlh.nlmsg_seq = rth->dump = ++rth->seq,
1538 .rtm.rtm_family = family,
1539 .rtm.rtm_flags = RTM_F_CLONED,
1540 };
1541 struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
aba5acdf 1542
56f5daac 1543 return sendto(rth->fd, (void *)&req, sizeof(req), 0, (struct sockaddr *)&nladdr, sizeof(nladdr));
aba5acdf
SH		 1544}
1545
1546static int iproute_flush_cache(void)
1547{
1548#define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1549
1550 int len;
56f5daac 1551 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
aba5acdf
SH		 1552 char *buffer = "-1";
1553
1554 if (flush_fd < 0) {
56f5daac 1555 fprintf(stderr, "Cannot open \"%s\": %s\n",
9827fa57 1556 ROUTE_FLUSH_PATH, strerror(errno));
aba5acdf
SH		 1557 return -1;
1558 }
1559
56f5daac 1560 len = strlen(buffer);
ae665a52 1561
56f5daac
SH		 1562 if ((write(flush_fd, (void *)buffer, len)) < len) {
1563 fprintf(stderr, "Cannot flush routing cache\n");
25352af7 1564 close(flush_fd);
aba5acdf
SH		 1565 return -1;
1566 }
1567 close(flush_fd);
1568 return 0;
1569}
1570
76c61b34
PE		 1571static __u32 route_dump_magic = 0x45311224;
1572
d1f28cf1
SH		 1573static int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n,
1574 void *arg)
f4ff11e3
DS		 1575{
1576 int ret;
1577 int len = n->nlmsg_len;
1578 struct rtmsg *r = NLMSG_DATA(n);
1579 struct rtattr *tb[RTA_MAX+1];
f3a2ddc1 1580 int host_len;
f4ff11e3 1581
f3a2ddc1 1582 host_len = af_bit_len(r->rtm_family);
f4ff11e3
DS		 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}
aba5acdf 1597
76c61b34
PE		 1598static int save_route_prep(void)
1599{
1600 int ret;
1601
1602 if (isatty(STDOUT_FILENO)) {
14645ec2 1603 fprintf(stderr, "Not sending a binary stream to stdout\n");
76c61b34
PE		 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
432e5f97
SH		 1616static int iproute_flush(int do_ipv6, 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 (do_ipv6 != AF_INET6) {
1625 iproute_flush_cache();
1626 if (show_stats)
1627 printf("*** IPv4 routing cache is flushed.\n");
1628 }
1629 if (do_ipv6 == 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_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 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 || do_ipv6 == 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
f4ff11e3 1678static int iproute_list_flush_or_save(int argc, char **argv, int action)
aba5acdf
SH		 1679{
1680 int do_ipv6 = preferred_family;
aba5acdf
SH		 1681 char *id = NULL;
1682 char *od = NULL;
b0373bfb 1683 unsigned int mark = 0;
f4ff11e3
DS		 1684 rtnl_filter_t filter_fn;
1685
76c61b34
PE		 1686 if (action == IPROUTE_SAVE) {
1687 if (save_route_prep())
1688 return -1;
1689
f4ff11e3 1690 filter_fn = save_route;
76c61b34 1691 } else
f4ff11e3 1692 filter_fn = print_route;
aba5acdf 1693
093b7646 1694 iproute_reset_filter(0);
aba5acdf
SH		 1695 filter.tb = RT_TABLE_MAIN;
1696
f4ff11e3 1697 if ((action == IPROUTE_FLUSH) && argc <= 0) {
aba5acdf
SH		 1698 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1699 return -1;
1700 }
1701
1702 while (argc > 0) {
1703 if (matches(*argv, "table") == 0) {
f332d169 1704 __u32 tid;
56f5daac 1705
aba5acdf
SH		 1706 NEXT_ARG();
1707 if (rtnl_rttable_a2n(&tid, *argv)) {
1708 if (strcmp(*argv, "all") == 0) {
bd4bcdad 1709 filter.tb = 0;
aba5acdf 1710 } else if (strcmp(*argv, "cache") == 0) {
bd4bcdad 1711 filter.cloned = 1;
aba5acdf
SH		 1712 } else if (strcmp(*argv, "help") == 0) {
1713 usage();
1714 } else {
1715 invarg("table id value is invalid\n", *argv);
1716 }
bd4bcdad
PM		 1717 } else
1718 filter.tb = tid;
0130f012
DA		 1719 } else if (matches(*argv, "vrf") == 0) {
1720 __u32 tid;
1721
1722 NEXT_ARG();
1723 tid = ipvrf_get_table(*argv);
1724 if (tid == 0)
1725 invarg("Invalid VRF\n", *argv);
1726 filter.tb = tid;
1727 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
aba5acdf
SH		 1728 } else if (matches(*argv, "cached") == 0 ||
1729 matches(*argv, "cloned") == 0) {
bd4bcdad 1730 filter.cloned = 1;
aba5acdf
SH		 1731 } else if (strcmp(*argv, "tos") == 0 ||
1732 matches(*argv, "dsfield") == 0) {
1733 __u32 tos;
56f5daac 1734
aba5acdf
SH		 1735 NEXT_ARG();
1736 if (rtnl_dsfield_a2n(&tos, *argv))
1737 invarg("TOS value is invalid\n", *argv);
1738 filter.tos = tos;
1739 filter.tosmask = -1;
1740 } else if (matches(*argv, "protocol") == 0) {
f332d169 1741 __u32 prot = 0;
56f5daac 1742
aba5acdf
SH		 1743 NEXT_ARG();
1744 filter.protocolmask = -1;
1745 if (rtnl_rtprot_a2n(&prot, *argv)) {
1746 if (strcmp(*argv, "all") != 0)
1747 invarg("invalid \"protocol\"\n", *argv);
1748 prot = 0;
1749 filter.protocolmask = 0;
1750 }
1751 filter.protocol = prot;
1752 } else if (matches(*argv, "scope") == 0) {
f332d169 1753 __u32 scope = 0;
56f5daac 1754
aba5acdf
SH		 1755 NEXT_ARG();
1756 filter.scopemask = -1;
1757 if (rtnl_rtscope_a2n(&scope, *argv)) {
1758 if (strcmp(*argv, "all") != 0)
1759 invarg("invalid \"scope\"\n", *argv);
1760 scope = RT_SCOPE_NOWHERE;
1761 filter.scopemask = 0;
1762 }
1763 filter.scope = scope;
1764 } else if (matches(*argv, "type") == 0) {
1765 int type;
56f5daac 1766
aba5acdf 1767 NEXT_ARG();
aba5acdf
SH		 1768 if (rtnl_rtntype_a2n(&type, *argv))
1769 invarg("node type value is invalid\n", *argv);
d84b1878 1770 filter.typemask = (1<<type);
aba5acdf
SH		 1771 } else if (strcmp(*argv, "dev") == 0 ||
1772 strcmp(*argv, "oif") == 0) {
1773 NEXT_ARG();
1774 od = *argv;
1775 } else if (strcmp(*argv, "iif") == 0) {
1776 NEXT_ARG();
1777 id = *argv;
b0373bfb
ED		 1778 } else if (strcmp(*argv, "mark") == 0) {
1779 NEXT_ARG();
7c66d898
PS		 1780 if (get_unsigned(&mark, *argv, 0))
1781 invarg("invalid mark value", *argv);
b0373bfb 1782 filter.markmask = -1;
ed7fdc95 1783 } else if (matches(*argv, "metric") == 0 ||
80d1c528
SH		 1784 matches(*argv, "priority") == 0 ||
1785 strcmp(*argv, "preference") == 0) {
ed7fdc95
AZ		 1786 __u32 metric;
1787
1788 NEXT_ARG();
1789 if (get_u32(&metric, *argv, 0))
1790 invarg("\"metric\" value is invalid\n", *argv);
1791 filter.metric = metric;
1792 filter.metricmask = -1;
aba5acdf 1793 } else if (strcmp(*argv, "via") == 0) {
93ae2835 1794 int family;
56f5daac 1795
aba5acdf 1796 NEXT_ARG();
93ae2835
EB		 1797 family = read_family(*argv);
1798 if (family == AF_UNSPEC)
1799 family = do_ipv6;
1800 else
1801 NEXT_ARG();
1802 get_prefix(&filter.rvia, *argv, family);
aba5acdf
SH		 1803 } else if (strcmp(*argv, "src") == 0) {
1804 NEXT_ARG();
1805 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1806 } else if (matches(*argv, "realms") == 0) {
1807 __u32 realm;
56f5daac 1808
aba5acdf 1809 NEXT_ARG();
d583e88e 1810 if (get_rt_realms_or_raw(&realm, *argv))
aba5acdf
SH		 1811 invarg("invalid realms\n", *argv);
1812 filter.realm = realm;
1813 filter.realmmask = ~0U;
1814 if ((filter.realm&0xFFFF) == 0 &&
1815 (*argv)[strlen(*argv) - 1] == '/')
1816 filter.realmmask &= ~0xFFFF;
1817 if ((filter.realm&0xFFFF0000U) == 0 &&
1818 (strchr(*argv, '/') == NULL ||
1819 (*argv)[0] == '/'))
1820 filter.realmmask &= ~0xFFFF0000U;
1821 } else if (matches(*argv, "from") == 0) {
1822 NEXT_ARG();
1823 if (matches(*argv, "root") == 0) {
1824 NEXT_ARG();
1825 get_prefix(&filter.rsrc, *argv, do_ipv6);
1826 } else if (matches(*argv, "match") == 0) {
1827 NEXT_ARG();
1828 get_prefix(&filter.msrc, *argv, do_ipv6);
1829 } else {
1830 if (matches(*argv, "exact") == 0) {
1831 NEXT_ARG();
1832 }
1833 get_prefix(&filter.msrc, *argv, do_ipv6);
1834 filter.rsrc = filter.msrc;
1835 }
1836 } else {
1837 if (matches(*argv, "to") == 0) {
1838 NEXT_ARG();
1839 }
1840 if (matches(*argv, "root") == 0) {
1841 NEXT_ARG();
1842 get_prefix(&filter.rdst, *argv, do_ipv6);
1843 } else if (matches(*argv, "match") == 0) {
1844 NEXT_ARG();
1845 get_prefix(&filter.mdst, *argv, do_ipv6);
1846 } else {
1847 if (matches(*argv, "exact") == 0) {
1848 NEXT_ARG();
1849 }
1850 get_prefix(&filter.mdst, *argv, do_ipv6);
1851 filter.rdst = filter.mdst;
1852 }
1853 }
1854 argc--; argv++;
1855 }
1856
1857 if (do_ipv6 == AF_UNSPEC && filter.tb)
1858 do_ipv6 = AF_INET;
1859
aba5acdf
SH		 1860 if (id || od) {
1861 int idx;
1862
1863 if (id) {
cc560825 1864 idx = ll_name_to_index(id);
fe99adbc
SP		 1865 if (!idx)
1866 return nodev(id);
aba5acdf
SH		 1867 filter.iif = idx;
1868 filter.iifmask = -1;
1869 }
1870 if (od) {
cc560825 1871 idx = ll_name_to_index(od);
fe99adbc
SP		 1872 if (!idx)
1873 return nodev(od);
aba5acdf
SH		 1874 filter.oif = idx;
1875 filter.oifmask = -1;
1876 }
1877 }
b0373bfb 1878 filter.mark = mark;
aba5acdf 1879
432e5f97
SH		 1880 if (action == IPROUTE_FLUSH)
1881 return iproute_flush(do_ipv6, filter_fn);
aba5acdf 1882
bd4bcdad 1883 if (!filter.cloned) {
aba5acdf
SH		 1884 if (rtnl_wilddump_request(&rth, do_ipv6, RTM_GETROUTE) < 0) {
1885 perror("Cannot send dump request");
2f406f2d 1886 return -2;
aba5acdf
SH		 1887 }
1888 } else {
1889 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1890 perror("Cannot send dump request");
2f406f2d 1891 return -2;
aba5acdf
SH		 1892 }
1893 }
1894
663c3cb2
SH		 1895 new_json_obj(json);
1896
cd70f3f5 1897 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
aba5acdf 1898 fprintf(stderr, "Dump terminated\n");
2f406f2d 1899 return -2;
aba5acdf
SH		 1900 }
1901
663c3cb2
SH		 1902 delete_json_obj();
1903 fflush(stdout);
2f406f2d 1904 return 0;
aba5acdf
SH		 1905}
1906
1907
d1f28cf1 1908static int iproute_get(int argc, char **argv)
aba5acdf 1909{
aba5acdf 1910 struct {
4806867a
SH		 1911 struct nlmsghdr n;
1912 struct rtmsg r;
56f5daac 1913 char buf[1024];
d17b136f
PS		 1914 } req = {
1915 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1916 .n.nlmsg_flags = NLM_F_REQUEST,
1917 .n.nlmsg_type = RTM_GETROUTE,
1918 .r.rtm_family = preferred_family,
1919 };
aba5acdf
SH		 1920 char *idev = NULL;
1921 char *odev = NULL;
86bf43c7 1922 struct nlmsghdr *answer;
aba5acdf 1923 int connected = 0;
aa883d86 1924 int fib_match = 0;
aba5acdf 1925 int from_ok = 0;
b0373bfb 1926 unsigned int mark = 0;
aba5acdf 1927
093b7646 1928 iproute_reset_filter(0);
c73f3e02 1929 filter.cloned = 2;
aba5acdf 1930
aba5acdf
SH		 1931 while (argc > 0) {
1932 if (strcmp(*argv, "tos") == 0 ||
1933 matches(*argv, "dsfield") == 0) {
1934 __u32 tos;
56f5daac 1935
aba5acdf
SH		 1936 NEXT_ARG();
1937 if (rtnl_dsfield_a2n(&tos, *argv))
1938 invarg("TOS value is invalid\n", *argv);
1939 req.r.rtm_tos = tos;
1940 } else if (matches(*argv, "from") == 0) {
1941 inet_prefix addr;
56f5daac 1942
aba5acdf
SH		 1943 NEXT_ARG();
1944 if (matches(*argv, "help") == 0)
1945 usage();
1946 from_ok = 1;
1947 get_prefix(&addr, *argv, req.r.rtm_family);
1948 if (req.r.rtm_family == AF_UNSPEC)
1949 req.r.rtm_family = addr.family;
1950 if (addr.bytelen)
21fef525
SH		 1951 addattr_l(&req.n, sizeof(req), RTA_SRC,
1952 &addr.data, addr.bytelen);
aba5acdf
SH		 1953 req.r.rtm_src_len = addr.bitlen;
1954 } else if (matches(*argv, "iif") == 0) {
1955 NEXT_ARG();
1956 idev = *argv;
b0373bfb
ED		 1957 } else if (matches(*argv, "mark") == 0) {
1958 NEXT_ARG();
7c66d898
PS		 1959 if (get_unsigned(&mark, *argv, 0))
1960 invarg("invalid mark value", *argv);
aba5acdf
SH		 1961 } else if (matches(*argv, "oif") == 0 ||
1962 strcmp(*argv, "dev") == 0) {
1963 NEXT_ARG();
1964 odev = *argv;
1965 } else if (matches(*argv, "notify") == 0) {
1966 req.r.rtm_flags |= RTM_F_NOTIFY;
1967 } else if (matches(*argv, "connected") == 0) {
1968 connected = 1;
0130f012
DA		 1969 } else if (matches(*argv, "vrf") == 0) {
1970 NEXT_ARG();
1971 if (!name_is_vrf(*argv))
1972 invarg("Invalid VRF\n", *argv);
1973 odev = *argv;
82252cdc
LC		 1974 } else if (matches(*argv, "uid") == 0) {
1975 uid_t uid;
1976
1977 NEXT_ARG();
1978 if (get_unsigned(&uid, *argv, 0))
1979 invarg("invalid UID\n", *argv);
1980 addattr32(&req.n, sizeof(req), RTA_UID, uid);
aa883d86
RP		 1981 } else if (matches(*argv, "fibmatch") == 0) {
1982 fib_match = 1;
2e86ed54
RP		 1983 } else if (strcmp(*argv, "as") == 0) {
1984 inet_prefix addr;
1985
1986 NEXT_ARG();
1987 if (strcmp(*argv, "to") == 0)
1988 NEXT_ARG();
1989 get_addr(&addr, *argv, req.r.rtm_family);
1990 if (req.r.rtm_family == AF_UNSPEC)
1991 req.r.rtm_family = addr.family;
21fef525
SH		 1992 addattr_l(&req.n, sizeof(req), RTA_NEWDST,
1993 &addr.data, addr.bytelen);
aba5acdf
SH		 1994 } else {
1995 inet_prefix addr;
56f5daac 1996
aba5acdf
SH		 1997 if (strcmp(*argv, "to") == 0) {
1998 NEXT_ARG();
1999 }
2000 if (matches(*argv, "help") == 0)
2001 usage();
2002 get_prefix(&addr, *argv, req.r.rtm_family);
2003 if (req.r.rtm_family == AF_UNSPEC)
2004 req.r.rtm_family = addr.family;
2005 if (addr.bytelen)
21fef525
SH		 2006 addattr_l(&req.n, sizeof(req),
2007 RTA_DST, &addr.data, addr.bytelen);
aba5acdf
SH		 2008 req.r.rtm_dst_len = addr.bitlen;
2009 }
2010 argc--; argv++;
2011 }
2012
2013 if (req.r.rtm_dst_len == 0) {
14645ec2 2014 fprintf(stderr, "need at least a destination address\n");
2f406f2d 2015 return -1;
aba5acdf
SH		 2016 }
2017
aba5acdf
SH		 2018 if (idev || odev) {
2019 int idx;
2020
2021 if (idev) {
cc560825 2022 idx = ll_name_to_index(idev);
fe99adbc
SP		 2023 if (!idx)
2024 return nodev(idev);
aba5acdf
SH		 2025 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
2026 }
2027 if (odev) {
cc560825 2028 idx = ll_name_to_index(odev);
fe99adbc
SP		 2029 if (!idx)
2030 return nodev(odev);
aba5acdf
SH		 2031 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
2032 }
2033 }
b0373bfb
ED		 2034 if (mark)
2035 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
aba5acdf
SH		 2036
2037 if (req.r.rtm_family == AF_UNSPEC)
2038 req.r.rtm_family = AF_INET;
2039
bc234301 2040 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
aa883d86
RP		 2041 if (fib_match)
2042 req.r.rtm_flags |= RTM_F_FIB_MATCH;
bc234301 2043
86bf43c7 2044 if (rtnl_talk(&rth, &req.n, &answer) < 0)
8b21cef1 2045 return -2;
aba5acdf
SH		 2046
2047 if (connected && !from_ok) {
86bf43c7
HL		 2048 struct rtmsg *r = NLMSG_DATA(answer);
2049 int len = answer->nlmsg_len;
56f5daac 2050 struct rtattr *tb[RTA_MAX+1];
aba5acdf 2051
86bf43c7 2052 if (print_route(NULL, answer, (void *)stdout) < 0) {
aba5acdf 2053 fprintf(stderr, "An error :-)\n");
86bf43c7 2054 free(answer);
8be29558 2055 return -1;
aba5acdf
SH		 2056 }
2057
86bf43c7 2058 if (answer->nlmsg_type != RTM_NEWROUTE) {
aba5acdf 2059 fprintf(stderr, "Not a route?\n");
86bf43c7 2060 free(answer);
aba5acdf
SH		 2061 return -1;
2062 }
2063 len -= NLMSG_LENGTH(sizeof(*r));
2064 if (len < 0) {
2065 fprintf(stderr, "Wrong len %d\n", len);
86bf43c7 2066 free(answer);
aba5acdf
SH		 2067 return -1;
2068 }
2069
aba5acdf
SH		 2070 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2071
2072 if (tb[RTA_PREFSRC]) {
2073 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
2074 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
2075 } else if (!tb[RTA_SRC]) {
2076 fprintf(stderr, "Failed to connect the route\n");
86bf43c7 2077 free(answer);
aba5acdf
SH		 2078 return -1;
2079 }
2080 if (!odev && tb[RTA_OIF])
2081 tb[RTA_OIF]->rta_type = 0;
2082 if (tb[RTA_GATEWAY])
2083 tb[RTA_GATEWAY]->rta_type = 0;
93ae2835
EB		 2084 if (tb[RTA_VIA])
2085 tb[RTA_VIA]->rta_type = 0;
aba5acdf
SH		 2086 if (!idev && tb[RTA_IIF])
2087 tb[RTA_IIF]->rta_type = 0;
2088 req.n.nlmsg_flags = NLM_F_REQUEST;
2089 req.n.nlmsg_type = RTM_GETROUTE;
2090
86bf43c7
HL		 2091 free(answer);
2092 if (rtnl_talk(&rth, &req.n, &answer) < 0)
56d8ff0a 2093 return -2;
aba5acdf
SH		 2094 }
2095
86bf43c7 2096 if (print_route(NULL, answer, (void *)stdout) < 0) {
aba5acdf 2097 fprintf(stderr, "An error :-)\n");
86bf43c7 2098 free(answer);
56d8ff0a 2099 return -1;
aba5acdf
SH		 2100 }
2101
86bf43c7 2102 free(answer);
56d8ff0a 2103 return 0;
aba5acdf
SH		 2104}
2105
79f4a393 2106static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
74af8dd9
XL		 2107{
2108 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
2109 return 1;
2110
2111 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
2112}
2113
0628cddd
ND		 2114static int restore_handler(const struct sockaddr_nl *nl,
2115 struct rtnl_ctrl_data *ctrl,
2116 struct nlmsghdr *n, void *arg)
f4ff11e3 2117{
74af8dd9
XL		 2118 struct rtmsg *r = NLMSG_DATA(n);
2119 struct rtattr *tb[RTA_MAX+1];
2120 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
2121 int ret, prio = *(int *)arg;
2122
2123 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
f4ff11e3 2124
74af8dd9
XL		 2125 /* Restore routes in correct order:
2126 * 0. ones for local addresses,
2127 * 1. ones for local networks,
2128 * 2. others (remote networks/hosts).
2129 */
2130 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
2131 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
2132 goto restore;
c85703bb 2133 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
74af8dd9
XL		 2134 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
2135 goto restore;
2136 else if (prio == 2 && tb[RTA_GATEWAY])
2137 goto restore;
2138
2139 return 0;
2140
2141restore:
f4ff11e3
DS		 2142 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
2143
2144 ll_init_map(&rth);
2145
86bf43c7 2146 ret = rtnl_talk(&rth, n, NULL);
f4ff11e3
DS		 2147 if ((ret < 0) && (errno == EEXIST))
2148 ret = 0;
2149
2150 return ret;
2151}
2152
76c61b34
PE		 2153static int route_dump_check_magic(void)
2154{
2155 int ret;
2156 __u32 magic = 0;
2157
2158 if (isatty(STDIN_FILENO)) {
2159 fprintf(stderr, "Can't restore route dump from a terminal\n");
2160 return -1;
2161 }
2162
2163 ret = fread(&magic, sizeof(magic), 1, stdin);
2164 if (magic != route_dump_magic) {
2165 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
2166 return -1;
2167 }
2168
2169 return 0;
2170}
2171
d1f28cf1 2172static int iproute_restore(void)
f4ff11e3 2173{
74af8dd9
XL		 2174 int pos, prio;
2175
76c61b34 2176 if (route_dump_check_magic())
2f406f2d 2177 return -1;
76c61b34 2178
74af8dd9 2179 pos = ftell(stdin);
bffb68b6
HL		 2180 if (pos == -1) {
2181 perror("Failed to restore: ftell");
2f406f2d 2182 return -1;
bffb68b6
HL		 2183 }
2184
74af8dd9
XL		 2185 for (prio = 0; prio < 3; prio++) {
2186 int err;
2187
2188 err = rtnl_from_file(stdin, &restore_handler, &prio);
2189 if (err)
2f406f2d 2190 return -2;
74af8dd9 2191
bffb68b6
HL		 2192 if (fseek(stdin, pos, SEEK_SET) == -1) {
2193 perror("Failed to restore: fseek");
2f406f2d 2194 return -1;
bffb68b6 2195 }
74af8dd9
XL		 2196 }
2197
2f406f2d 2198 return 0;
f4ff11e3
DS		 2199}
2200
0628cddd
ND		 2201static int show_handler(const struct sockaddr_nl *nl,
2202 struct rtnl_ctrl_data *ctrl,
2203 struct nlmsghdr *n, void *arg)
93b79863
PE		 2204{
2205 print_route(nl, n, stdout);
2206 return 0;
2207}
2208
2209static int iproute_showdump(void)
2210{
2211 if (route_dump_check_magic())
2f406f2d 2212 return -1;
93b79863 2213
2f406f2d
ÉB		 2214 if (rtnl_from_file(stdin, &show_handler, NULL))
2215 return -2;
2216
2217 return 0;
93b79863
PE		 2218}
2219
093b7646 2220void iproute_reset_filter(int ifindex)
aba5acdf
SH		 2221{
2222 memset(&filter, 0, sizeof(filter));
2223 filter.mdst.bitlen = -1;
2224 filter.msrc.bitlen = -1;
093b7646 2225 filter.oif = ifindex;
2226 if (filter.oif > 0)
2227 filter.oifmask = -1;
aba5acdf
SH		 2228}
2229
2230int do_iproute(int argc, char **argv)
2231{
2232 if (argc < 1)
f4ff11e3 2233 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
ae665a52 2234
aba5acdf
SH		 2235 if (matches(*argv, "add") == 0)
2236 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
2237 argc-1, argv+1);
2238 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
2239 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
2240 argc-1, argv+1);
2241 if (matches(*argv, "replace") == 0)
2242 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
2243 argc-1, argv+1);
2244 if (matches(*argv, "prepend") == 0)
2245 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
2246 argc-1, argv+1);
2247 if (matches(*argv, "append") == 0)
2248 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
2249 argc-1, argv+1);
2250 if (matches(*argv, "test") == 0)
2251 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
2252 argc-1, argv+1);
2253 if (matches(*argv, "delete") == 0)
2254 return iproute_modify(RTM_DELROUTE, 0,
2255 argc-1, argv+1);
2256 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2257 || matches(*argv, "lst") == 0)
f4ff11e3 2258 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
aba5acdf
SH		 2259 if (matches(*argv, "get") == 0)
2260 return iproute_get(argc-1, argv+1);
2261 if (matches(*argv, "flush") == 0)
f4ff11e3
DS		 2262 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2263 if (matches(*argv, "save") == 0)
2264 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2265 if (matches(*argv, "restore") == 0)
2266 return iproute_restore();
93b79863
PE		 2267 if (matches(*argv, "showdump") == 0)
2268 return iproute_showdump();
aba5acdf
SH		 2269 if (matches(*argv, "help") == 0)
2270 usage();
80d1c528
SH		 2271
2272 fprintf(stderr,
2273 "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
aba5acdf
SH		 2274 exit(-1);
2275}
Upstream mirror of iproute2