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Merge branch 'master' into iproute2-next
[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"
804c7fff
RP		 72 " [ uid NUMBER ] [ ipproto PROTOCOL ]\n"
73 " [ sport NUMBER ] [ dport NUMBER ]\n"
21fef525
SH		 74 " ip route { add | del | change | append | replace } ROUTE\n"
75 "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"
76 " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n"
77 " [ type TYPE ] [ scope SCOPE ]\n"
78 "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"
79 "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"
80 " [ table TABLE_ID ] [ proto RTPROTO ]\n"
81 " [ scope SCOPE ] [ metric METRIC ]\n"
82 " [ ttl-propagate { enabled | disabled } ]\n"
83 "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n"
84 "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n"
85 " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"
86 "FAMILY := [ inet | inet6 | ipx | dnet | mpls | bridge | link ]\n"
87 "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n"
88 " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n"
89 " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"
90 " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"
91 " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n"
92 " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n"
e54ed380 93 " [ pref PREF ] [ expires TIME ] [ fastopen_no_cookie BOOL ]\n"
21fef525
SH		 94 "TYPE := { unicast | local | broadcast | multicast | throw |\n"
95 " unreachable | prohibit | blackhole | nat }\n"
96 "TABLE_ID := [ local | main | default | all | NUMBER ]\n"
97 "SCOPE := [ host | link | global | NUMBER ]\n"
98 "NHFLAGS := [ onlink | pervasive ]\n"
99 "RTPROTO := [ kernel | boot | static | NUMBER ]\n"
100 "PREF := [ low | medium | high ]\n"
101 "TIME := NUMBER[s|ms]\n"
102 "BOOL := [1|0]\n"
103 "FEATURES := ecn\n"
104 "ENCAPTYPE := [ mpls | ip | ip6 | seg6 | seg6local ]\n"
105 "ENCAPHDR := [ MPLSLABEL | SEG6HDR ]\n"
106 "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n"
107 "SEGMODE := [ encap | inline ]\n"
108 "ROUTE_GET_FLAGS := [ fibmatch ]\n");
aba5acdf
SH		 109 exit(-1);
110}
111
112
113static struct
114{
caae16b3 115 unsigned int tb;
bd4bcdad 116 int cloned;
aba5acdf
SH		 117 int flushed;
118 char *flushb;
119 int flushp;
120 int flushe;
aba5acdf
SH		 121 int protocol, protocolmask;
122 int scope, scopemask;
d84b1878 123 __u64 typemask;
aba5acdf
SH		 124 int tos, tosmask;
125 int iif, iifmask;
126 int oif, oifmask;
b0373bfb 127 int mark, markmask;
aba5acdf 128 int realm, realmmask;
ed7fdc95 129 __u32 metric, metricmask;
aba5acdf
SH		 130 inet_prefix rprefsrc;
131 inet_prefix rvia;
132 inet_prefix rdst;
133 inet_prefix mdst;
134 inet_prefix rsrc;
135 inet_prefix msrc;
136} filter;
137
138static int flush_update(void)
139{
f31a37f7 140 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
1fb0a998 141 perror("Failed to send flush request");
2f406f2d 142 return -2;
aba5acdf
SH		 143 }
144 filter.flushp = 0;
145 return 0;
146}
147
d1f28cf1 148static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
aba5acdf 149{
aba5acdf 150 struct rtmsg *r = NLMSG_DATA(n);
d17b136f
PS		 151 inet_prefix dst = { .family = r->rtm_family };
152 inet_prefix src = { .family = r->rtm_family };
153 inet_prefix via = { .family = r->rtm_family };
154 inet_prefix prefsrc = { .family = r->rtm_family };
34e95647 155 __u32 table;
f4ff11e3 156 static int ip6_multiple_tables;
aba5acdf 157
34e95647
PM		 158 table = rtm_get_table(r, tb);
159
5b9ac190
AV		 160 if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
161 return 0;
162
34e95647 163 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
e0b29fe7
PM		 164 ip6_multiple_tables = 1;
165
80d1c528 166 if (filter.cloned == !(r->rtm_flags & RTM_F_CLONED))
44792827
UW		 167 return 0;
168
e0b29fe7 169 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
aba5acdf 170 if (filter.tb) {
bd4bcdad
PM		 171 if (filter.tb == RT_TABLE_LOCAL) {
172 if (r->rtm_type != RTN_LOCAL)
aba5acdf 173 return 0;
bd4bcdad
PM		 174 } else if (filter.tb == RT_TABLE_MAIN) {
175 if (r->rtm_type == RTN_LOCAL)
aba5acdf 176 return 0;
bd4bcdad
PM		 177 } else {
178 return 0;
aba5acdf
SH		 179 }
180 }
181 } else {
34e95647 182 if (filter.tb > 0 && filter.tb != table)
aba5acdf
SH		 183 return 0;
184 }
185 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
186 return 0;
187 if ((filter.scope^r->rtm_scope)&filter.scopemask)
188 return 0;
d84b1878
DA		 189
190 if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
aba5acdf
SH		 191 return 0;
192 if ((filter.tos^r->rtm_tos)&filter.tosmask)
193 return 0;
c1218072
AZ		 194 if (filter.rdst.family) {
195 if (r->rtm_family != filter.rdst.family ||
196 filter.rdst.bitlen > r->rtm_dst_len)
197 return 0;
198 } else if (filter.rdst.flags & PREFIXLEN_SPECIFIED) {
199 if (filter.rdst.bitlen > r->rtm_dst_len)
200 return 0;
201 }
202 if (filter.mdst.family) {
203 if (r->rtm_family != filter.mdst.family ||
204 (filter.mdst.bitlen >= 0 &&
205 filter.mdst.bitlen < r->rtm_dst_len))
206 return 0;
207 } else if (filter.mdst.flags & PREFIXLEN_SPECIFIED) {
208 if (filter.mdst.bitlen >= 0 &&
209 filter.mdst.bitlen < r->rtm_dst_len)
210 return 0;
211 }
212 if (filter.rsrc.family) {
213 if (r->rtm_family != filter.rsrc.family ||
214 filter.rsrc.bitlen > r->rtm_src_len)
215 return 0;
216 } else if (filter.rsrc.flags & PREFIXLEN_SPECIFIED) {
217 if (filter.rsrc.bitlen > r->rtm_src_len)
218 return 0;
219 }
220 if (filter.msrc.family) {
221 if (r->rtm_family != filter.msrc.family ||
222 (filter.msrc.bitlen >= 0 &&
223 filter.msrc.bitlen < r->rtm_src_len))
224 return 0;
225 } else if (filter.msrc.flags & PREFIXLEN_SPECIFIED) {
226 if (filter.msrc.bitlen >= 0 &&
227 filter.msrc.bitlen < r->rtm_src_len)
228 return 0;
229 }
93ae2835
EB		 230 if (filter.rvia.family) {
231 int family = r->rtm_family;
56f5daac 232
93ae2835
EB		 233 if (tb[RTA_VIA]) {
234 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
56f5daac 235
93ae2835
EB		 236 family = via->rtvia_family;
237 }
238 if (family != filter.rvia.family)
239 return 0;
240 }
aba5acdf
SH		 241 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
242 return 0;
243
aba5acdf
SH		 244 if (tb[RTA_DST])
245 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
c1218072
AZ		 246 if (filter.rsrc.family || filter.msrc.family ||
247 filter.rsrc.flags & PREFIXLEN_SPECIFIED ||
248 filter.msrc.flags & PREFIXLEN_SPECIFIED) {
aba5acdf
SH		 249 if (tb[RTA_SRC])
250 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
251 }
56f5daac 252 if (filter.rvia.bitlen > 0) {
aba5acdf 253 if (tb[RTA_GATEWAY])
7849fb55 254 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
93ae2835
EB		 255 if (tb[RTA_VIA]) {
256 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
257 struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
56f5daac 258
93ae2835
EB		 259 via.family = rtvia->rtvia_family;
260 memcpy(&via.data, rtvia->rtvia_addr, len);
261 }
aba5acdf 262 }
56f5daac 263 if (filter.rprefsrc.bitlen > 0) {
aba5acdf 264 if (tb[RTA_PREFSRC])
7849fb55 265 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
aba5acdf
SH		 266 }
267
c1218072
AZ		 268 if ((filter.rdst.family || filter.rdst.flags & PREFIXLEN_SPECIFIED) &&
269 inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
aba5acdf 270 return 0;
c1218072 271 if ((filter.mdst.family || filter.mdst.flags & PREFIXLEN_SPECIFIED) &&
aba5acdf
SH		 272 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
273 return 0;
274
c1218072
AZ		 275 if ((filter.rsrc.family || filter.rsrc.flags & PREFIXLEN_SPECIFIED) &&
276 inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
aba5acdf 277 return 0;
c1218072
AZ		 278 if ((filter.msrc.family || filter.msrc.flags & PREFIXLEN_SPECIFIED) &&
279 filter.msrc.bitlen >= 0 &&
aba5acdf
SH		 280 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
281 return 0;
282
283 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
284 return 0;
285 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
286 return 0;
287 if (filter.realmmask) {
288 __u32 realms = 0;
56f5daac 289
aba5acdf 290 if (tb[RTA_FLOW])
ff24746c 291 realms = rta_getattr_u32(tb[RTA_FLOW]);
aba5acdf
SH		 292 if ((realms^filter.realm)&filter.realmmask)
293 return 0;
294 }
295 if (filter.iifmask) {
296 int iif = 0;
56f5daac 297
aba5acdf 298 if (tb[RTA_IIF])
9f1370c0 299 iif = rta_getattr_u32(tb[RTA_IIF]);
aba5acdf
SH		 300 if ((iif^filter.iif)&filter.iifmask)
301 return 0;
302 }
303 if (filter.oifmask) {
304 int oif = 0;
56f5daac 305
aba5acdf 306 if (tb[RTA_OIF])
9f1370c0 307 oif = rta_getattr_u32(tb[RTA_OIF]);
aba5acdf
SH		 308 if ((oif^filter.oif)&filter.oifmask)
309 return 0;
310 }
b0373bfb
ED		 311 if (filter.markmask) {
312 int mark = 0;
56f5daac 313
b0373bfb 314 if (tb[RTA_MARK])
9f1370c0 315 mark = rta_getattr_u32(tb[RTA_MARK]);
b0373bfb
ED		 316 if ((mark ^ filter.mark) & filter.markmask)
317 return 0;
318 }
ed7fdc95
AZ		 319 if (filter.metricmask) {
320 __u32 metric = 0;
321
322 if (tb[RTA_PRIORITY])
323 metric = rta_getattr_u32(tb[RTA_PRIORITY]);
324 if ((metric ^ filter.metric) & filter.metricmask)
325 return 0;
326 }
ae665a52 327 if (filter.flushb &&
aba5acdf
SH		 328 r->rtm_family == AF_INET6 &&
329 r->rtm_dst_len == 0 &&
330 r->rtm_type == RTN_UNREACHABLE &&
331 tb[RTA_PRIORITY] &&
9f1370c0 332 rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
aba5acdf
SH		 333 return 0;
334
f4ff11e3
DS		 335 return 1;
336}
337
29d1f730
FW		 338static void print_rtax_features(FILE *fp, unsigned int features)
339{
340 unsigned int of = features;
341
342 if (features & RTAX_FEATURE_ECN) {
663c3cb2 343 print_null(PRINT_ANY, "ecn", "ecn ", NULL);
29d1f730
FW		 344 features &= ~RTAX_FEATURE_ECN;
345 }
346
347 if (features)
663c3cb2
SH		 348 print_0xhex(PRINT_ANY,
349 "features", "0x%x ", of);
29d1f730
FW		 350}
351
b3ab1e68
SH		 352static void print_rt_flags(FILE *fp, unsigned int flags)
353{
663c3cb2
SH		 354 open_json_array(PRINT_JSON,
355 is_json_context() ? "flags" : "");
356
b3ab1e68 357 if (flags & RTNH_F_DEAD)
663c3cb2 358 print_string(PRINT_ANY, NULL, "%s ", "dead");
b3ab1e68 359 if (flags & RTNH_F_ONLINK)
663c3cb2 360 print_string(PRINT_ANY, NULL, "%s ", "onlink");
b3ab1e68 361 if (flags & RTNH_F_PERVASIVE)
663c3cb2 362 print_string(PRINT_ANY, NULL, "%s ", "pervasive");
b3ab1e68 363 if (flags & RTNH_F_OFFLOAD)
663c3cb2
SH		 364 print_string(PRINT_ANY, NULL, "%s ", "offload");
365 if (flags & RTM_F_NOTIFY)
366 print_string(PRINT_ANY, NULL, "%s ", "notify");
b3ab1e68 367 if (flags & RTNH_F_LINKDOWN)
663c3cb2 368 print_string(PRINT_ANY, NULL, "%s ", "linkdown");
b3ab1e68 369 if (flags & RTNH_F_UNRESOLVED)
663c3cb2
SH		 370 print_string(PRINT_ANY, NULL, "%s ", "unresolved");
371
372 close_json_array(PRINT_JSON, NULL);
b3ab1e68
SH		 373}
374
8cfc2d47
SH		 375static void print_rt_pref(FILE *fp, unsigned int pref)
376{
8cfc2d47
SH		 377
378 switch (pref) {
379 case ICMPV6_ROUTER_PREF_LOW:
663c3cb2
SH		 380 print_string(PRINT_ANY,
381 "pref", "pref %s", "low");
8cfc2d47
SH		 382 break;
383 case ICMPV6_ROUTER_PREF_MEDIUM:
663c3cb2
SH		 384 print_string(PRINT_ANY,
385 "pref", "pref %s", "medium");
8cfc2d47
SH		 386 break;
387 case ICMPV6_ROUTER_PREF_HIGH:
663c3cb2
SH		 388 print_string(PRINT_ANY,
389 "pref", "pref %s", "high");
8cfc2d47
SH		 390 break;
391 default:
663c3cb2
SH		 392 print_uint(PRINT_ANY,
393 "pref", "%u", pref);
8cfc2d47
SH		 394 }
395}
396
1506d8d3 397static void print_rta_if(FILE *fp, const struct rtattr *rta,
663c3cb2 398 const char *prefix)
1506d8d3
SH		 399{
400 const char *ifname = ll_index_to_name(rta_getattr_u32(rta));
401
663c3cb2
SH		 402 if (is_json_context())
403 print_string(PRINT_JSON, prefix, NULL, ifname);
404 else {
405 fprintf(fp, "%s ", prefix);
406 color_fprintf(fp, COLOR_IFNAME, "%s ", ifname);
407 }
1506d8d3
SH		 408}
409
daf30f6f
SH		 410static void print_cache_flags(FILE *fp, __u32 flags)
411{
663c3cb2 412 json_writer_t *jw = get_json_writer();
daf30f6f
SH		 413 flags &= ~0xFFFF;
414
663c3cb2
SH		 415 if (jw) {
416 jsonw_name(jw, "cache");
417 jsonw_start_array(jw);
418 } else {
419 fprintf(fp, "%s cache ", _SL_);
420 if (flags == 0)
421 return;
422 putc('<', fp);
423 }
daf30f6f
SH		 424
425#define PRTFL(fl, flname) \
426 if (flags & RTCF_##fl) { \
427 flags &= ~RTCF_##fl; \
663c3cb2
SH		 428 if (jw) \
429 jsonw_string(jw, flname); \
430 else \
431 fprintf(fp, "%s%s", flname, flags ? "," : "> "); \
daf30f6f
SH		 432 }
433
434 PRTFL(LOCAL, "local");
435 PRTFL(REJECT, "reject");
436 PRTFL(MULTICAST, "mc");
437 PRTFL(BROADCAST, "brd");
438 PRTFL(DNAT, "dst-nat");
439 PRTFL(SNAT, "src-nat");
440 PRTFL(MASQ, "masq");
441 PRTFL(DIRECTDST, "dst-direct");
442 PRTFL(DIRECTSRC, "src-direct");
443 PRTFL(REDIRECTED, "redirected");
444 PRTFL(DOREDIRECT, "redirect");
445 PRTFL(FAST, "fastroute");
446 PRTFL(NOTIFY, "notify");
447 PRTFL(TPROXY, "proxy");
448#undef PRTFL
449
450 if (flags)
663c3cb2
SH		 451 print_hex(PRINT_ANY, "flags", "%x>", flags);
452
453 if (jw) {
454 jsonw_end_array(jw);
455 jsonw_destroy(&jw);
456 }
daf30f6f
SH		 457}
458
6e41810e
SH		 459static void print_rta_cacheinfo(FILE *fp, const struct rta_cacheinfo *ci)
460{
461 static int hz;
462
463 if (!hz)
464 hz = get_user_hz();
663c3cb2 465
6e41810e 466 if (ci->rta_expires != 0)
39d16a02
DA		 467 print_int(PRINT_ANY, "expires",
468 "expires %dsec ", ci->rta_expires/hz);
6e41810e 469 if (ci->rta_error != 0)
663c3cb2
SH		 470 print_uint(PRINT_ANY, "error",
471 "error %u ", ci->rta_error);
472
6e41810e
SH		 473 if (show_stats) {
474 if (ci->rta_clntref)
663c3cb2
SH		 475 print_uint(PRINT_ANY, "users",
476 "users %u ", ci->rta_clntref);
6e41810e 477 if (ci->rta_used != 0)
663c3cb2
SH		 478 print_uint(PRINT_ANY, "used",
479 "used %u ", ci->rta_used);
6e41810e 480 if (ci->rta_lastuse != 0)
663c3cb2
SH		 481 print_uint(PRINT_ANY, "age",
482 "age %usec ", ci->rta_lastuse/hz);
6e41810e
SH		 483 }
484 if (ci->rta_id)
663c3cb2
SH		 485 print_0xhex(PRINT_ANY, "ipid",
486 "ipid 0x%04x ", ci->rta_id);
487 if (ci->rta_ts || ci->rta_tsage) {
488 print_0xhex(PRINT_ANY, "ts",
489 "ts 0x%x", ci->rta_ts);
490 print_uint(PRINT_ANY, "tsage",
491 "tsage %usec ", ci->rta_tsage);
492 }
6e41810e
SH		 493}
494
5782965a
SH		 495static void print_rta_flow(FILE *fp, const struct rtattr *rta)
496{
497 __u32 to = rta_getattr_u32(rta);
498 __u32 from = to >> 16;
499 SPRINT_BUF(b1);
500
501 to &= 0xFFFF;
663c3cb2
SH		 502 if (is_json_context()) {
503 open_json_object("flow");
504
505 if (from)
506 print_string(PRINT_JSON, "from", NULL,
507 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
508 print_string(PRINT_JSON, "to", NULL,
509 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
510 close_json_object();
511 } else {
512 fprintf(fp, "realm%s ", from ? "s" : "");
513
514 if (from)
515 print_string(PRINT_FP, NULL, "%s/",
516 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
517 print_string(PRINT_FP, NULL, "%s ",
518 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
5782965a 519 }
5782965a
SH		 520}
521
a3484a9f
SH		 522static void print_rta_newdst(FILE *fp, const struct rtmsg *r,
523 const struct rtattr *rta)
524{
525 const char *newdst = format_host_rta(r->rtm_family, rta);
526
663c3cb2
SH		 527 if (is_json_context())
528 print_string(PRINT_JSON, "to", NULL, newdst);
529 else {
530 fprintf(fp, "as to ");
531 print_color_string(PRINT_FP,
532 ifa_family_color(r->rtm_family),
533 NULL, "%s ", newdst);
534 }
a3484a9f
SH		 535}
536
537static void print_rta_gateway(FILE *fp, const struct rtmsg *r,
538 const struct rtattr *rta)
539{
540 const char *gateway = format_host_rta(r->rtm_family, rta);
541
663c3cb2
SH		 542 if (is_json_context())
543 print_string(PRINT_JSON, "gateway", NULL, gateway);
544 else {
545 fprintf(fp, "via ");
546 print_color_string(PRINT_FP,
547 ifa_family_color(r->rtm_family),
548 NULL, "%s ", gateway);
549 }
a3484a9f
SH		 550}
551
552static void print_rta_via(FILE *fp, const struct rtattr *rta)
553{
663c3cb2 554 size_t len = RTA_PAYLOAD(rta) - 2;
a3484a9f 555 const struct rtvia *via = RTA_DATA(rta);
a3484a9f 556
663c3cb2
SH		 557 if (is_json_context()) {
558 open_json_object("via");
559 print_string(PRINT_JSON, "family", NULL,
560 family_name(via->rtvia_family));
561 print_string(PRINT_JSON, "host", NULL,
562 format_host(via->rtvia_family, len,
563 via->rtvia_addr));
564 close_json_object();
565 } else {
566 print_string(PRINT_FP, NULL, "via %s ",
567 family_name(via->rtvia_family));
568 print_color_string(PRINT_FP,
569 ifa_family_color(via->rtvia_family),
570 NULL, "%s ",
571 format_host(via->rtvia_family,
572 len, via->rtvia_addr));
573 }
a3484a9f
SH		 574}
575
968272e7
SH		 576static void print_rta_metrics(FILE *fp, const struct rtattr *rta)
577{
578 struct rtattr *mxrta[RTAX_MAX+1];
579 unsigned int mxlock = 0;
580 int i;
581
663c3cb2
SH		 582 open_json_array(PRINT_JSON, "metrics");
583
968272e7
SH		 584 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta));
585
586 if (mxrta[RTAX_LOCK])
587 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
588
589 for (i = 2; i <= RTAX_MAX; i++) {
590 __u32 val = 0U;
591
592 if (mxrta[i] == NULL && !(mxlock & (1 << i)))
593 continue;
594
595 if (mxrta[i] != NULL && i != RTAX_CC_ALGO)
596 val = rta_getattr_u32(mxrta[i]);
597
598 if (i == RTAX_HOPLIMIT && (int)val == -1)
599 continue;
600
663c3cb2
SH		 601 if (!is_json_context()) {
602 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
603 fprintf(fp, "%s ", mx_names[i]);
604 else
605 fprintf(fp, "metric %d ", i);
968272e7 606
663c3cb2
SH		 607 if (mxlock & (1<<i))
608 fprintf(fp, "lock ");
609 }
968272e7
SH		 610
611 switch (i) {
612 case RTAX_FEATURES:
613 print_rtax_features(fp, val);
614 break;
615 default:
616 fprintf(fp, "%u ", val);
617 break;
618
619 case RTAX_RTT:
620 case RTAX_RTTVAR:
621 case RTAX_RTO_MIN:
622 if (i == RTAX_RTT)
623 val /= 8;
624 else if (i == RTAX_RTTVAR)
625 val /= 4;
626
663c3cb2
SH		 627 if (is_json_context())
628 print_uint(PRINT_JSON, mx_names[i],
629 NULL, val);
630 else {
631 if (val >= 1000)
632 fprintf(fp, "%gs ", val/1e3);
633 else
634 fprintf(fp, "%ums ", val);
635 }
968272e7
SH		 636 break;
637 case RTAX_CC_ALGO:
663c3cb2
SH		 638 print_string(PRINT_ANY, "congestion",
639 "%s ", rta_getattr_str(mxrta[i]));
968272e7
SH		 640 break;
641 }
642 }
663c3cb2
SH		 643
644 close_json_array(PRINT_JSON, NULL);
968272e7
SH		 645}
646
f48e1488
SH		 647static void print_rta_multipath(FILE *fp, const struct rtmsg *r,
648 struct rtattr *rta)
649{
650 const struct rtnexthop *nh = RTA_DATA(rta);
651 int len = RTA_PAYLOAD(rta);
652 int first = 1;
653
c0ec7c9f 654 while (len >= sizeof(*nh)) {
f48e1488
SH		 655 struct rtattr *tb[RTA_MAX + 1];
656
657 if (nh->rtnh_len > len)
658 break;
659
663c3cb2
SH		 660 if (!is_json_context()) {
661 if ((r->rtm_flags & RTM_F_CLONED) &&
662 r->rtm_type == RTN_MULTICAST) {
663 if (first) {
664 fprintf(fp, "Oifs: ");
665 first = 0;
666 } else {
667 fprintf(fp, " ");
668 }
669 } else
670 fprintf(fp, "%s\tnexthop ", _SL_);
671 }
f48e1488
SH		 672
673 if (nh->rtnh_len > sizeof(*nh)) {
674 parse_rtattr(tb, RTA_MAX, RTNH_DATA(nh),
675 nh->rtnh_len - sizeof(*nh));
676
677 if (tb[RTA_ENCAP])
678 lwt_print_encap(fp,
679 tb[RTA_ENCAP_TYPE],
680 tb[RTA_ENCAP]);
681 if (tb[RTA_NEWDST])
682 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
683 if (tb[RTA_GATEWAY])
684 print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
685 if (tb[RTA_VIA])
686 print_rta_via(fp, tb[RTA_VIA]);
687 if (tb[RTA_FLOW])
688 print_rta_flow(fp, tb[RTA_FLOW]);
689 }
690
80d1c528
SH		 691 if ((r->rtm_flags & RTM_F_CLONED) &&
692 r->rtm_type == RTN_MULTICAST) {
f48e1488
SH		 693 fprintf(fp, "%s", ll_index_to_name(nh->rtnh_ifindex));
694 if (nh->rtnh_hops != 1)
695 fprintf(fp, "(ttl>%d)", nh->rtnh_hops);
696 fprintf(fp, " ");
697 } else {
663c3cb2 698 fprintf(fp, "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
f48e1488
SH		 699 if (r->rtm_family != AF_MPLS)
700 fprintf(fp, "weight %d ",
701 nh->rtnh_hops+1);
702 }
703
704 print_rt_flags(fp, nh->rtnh_flags);
705
706 len -= NLMSG_ALIGN(nh->rtnh_len);
707 nh = RTNH_NEXT(nh);
708 }
709}
710
f4ff11e3
DS		 711int print_route(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
712{
56f5daac 713 FILE *fp = (FILE *)arg;
f4ff11e3
DS		 714 struct rtmsg *r = NLMSG_DATA(n);
715 int len = n->nlmsg_len;
56f5daac 716 struct rtattr *tb[RTA_MAX+1];
663c3cb2 717 int family, color, host_len;
f4ff11e3 718 __u32 table;
2f406f2d 719 int ret;
56f5daac 720
f4ff11e3 721 SPRINT_BUF(b1);
f4ff11e3
DS		 722
723 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
724 fprintf(stderr, "Not a route: %08x %08x %08x\n",
725 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
ba7b9777 726 return -1;
f4ff11e3
DS		 727 }
728 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
729 return 0;
730 len -= NLMSG_LENGTH(sizeof(*r));
731 if (len < 0) {
732 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
733 return -1;
734 }
735
f3a2ddc1 736 host_len = af_bit_len(r->rtm_family);
f4ff11e3
DS		 737
738 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
739 table = rtm_get_table(r, tb);
740
741 if (!filter_nlmsg(n, tb, host_len))
742 return 0;
743
aba5acdf
SH		 744 if (filter.flushb) {
745 struct nlmsghdr *fn;
56f5daac 746
aba5acdf 747 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
cc560825
SH		 748 ret = flush_update();
749 if (ret < 0)
2f406f2d 750 return ret;
aba5acdf 751 }
56f5daac 752 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
aba5acdf
SH		 753 memcpy(fn, n, n->nlmsg_len);
754 fn->nlmsg_type = RTM_DELROUTE;
755 fn->nlmsg_flags = NLM_F_REQUEST;
351efcde 756 fn->nlmsg_seq = ++rth.seq;
56f5daac 757 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
aba5acdf
SH		 758 filter.flushed++;
759 if (show_stats < 2)
760 return 0;
761 }
762
663c3cb2 763 open_json_object(NULL);
aba5acdf 764 if (n->nlmsg_type == RTM_DELROUTE)
663c3cb2
SH		 765 print_bool(PRINT_ANY, "deleted", "Deleted ", true);
766
d84b1878
DA		 767 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
768 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
663c3cb2
SH		 769 print_string(PRINT_ANY, NULL, "%s ",
770 rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
aba5acdf 771
663c3cb2 772 color = COLOR_NONE;
aba5acdf 773 if (tb[RTA_DST]) {
56e3eb4c 774 family = get_real_family(r->rtm_type, r->rtm_family);
663c3cb2
SH		 775 color = ifa_family_color(family);
776
aba5acdf 777 if (r->rtm_dst_len != host_len) {
663c3cb2
SH		 778 snprintf(b1, sizeof(b1),
779 "%s/%u", rt_addr_n2a_rta(family, tb[RTA_DST]),
780 r->rtm_dst_len);
aba5acdf 781 } else {
663c3cb2
SH		 782 format_host_rta_r(family, tb[RTA_DST],
783 b1, sizeof(b1));
784
aba5acdf
SH		 785 }
786 } else if (r->rtm_dst_len) {
663c3cb2 787 snprintf(b1, sizeof(b1), "0/%d ", r->rtm_dst_len);
aba5acdf 788 } else {
663c3cb2 789 strncpy(b1, "default", sizeof(b1));
aba5acdf 790 }
663c3cb2
SH		 791 print_color_string(PRINT_ANY, color,
792 "dst", "%s ", b1);
793
aba5acdf 794 if (tb[RTA_SRC]) {
56e3eb4c 795 family = get_real_family(r->rtm_type, r->rtm_family);
663c3cb2
SH		 796 color = ifa_family_color(family);
797
aba5acdf 798 if (r->rtm_src_len != host_len) {
663c3cb2
SH		 799 snprintf(b1, sizeof(b1),
800 "%s/%u",
801 rt_addr_n2a_rta(family, tb[RTA_SRC]),
802 r->rtm_src_len);
aba5acdf 803 } else {
663c3cb2
SH		 804 format_host_rta_r(family, tb[RTA_SRC],
805 b1, sizeof(b1));
aba5acdf 806 }
663c3cb2
SH		 807 print_color_string(PRINT_ANY, color,
808 "from", "from %s ", b1);
aba5acdf 809 } else if (r->rtm_src_len) {
663c3cb2
SH		 810 snprintf(b1, sizeof(b1), "0/%u", r->rtm_src_len);
811
812 print_string(PRINT_ANY, "src", "from %s ", b1);
aba5acdf 813 }
a3484a9f
SH		 814
815 if (tb[RTA_NEWDST])
816 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
1e529305
RP		 817
818 if (tb[RTA_ENCAP])
819 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
820
aba5acdf 821 if (r->rtm_tos && filter.tosmask != -1) {
663c3cb2
SH		 822 print_string(PRINT_ANY, "tos", "tos %s ",
823 rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
aba5acdf 824 }
02d2ae55 825
a3484a9f
SH		 826 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len)
827 print_rta_gateway(fp, r, tb[RTA_GATEWAY]);
828
829 if (tb[RTA_VIA])
830 print_rta_via(fp, tb[RTA_VIA]);
56f5daac 831
aba5acdf 832 if (tb[RTA_OIF] && filter.oifmask != -1)
663c3cb2 833 print_rta_if(fp, tb[RTA_OIF], "dev");
aba5acdf 834
bc234301 835 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
663c3cb2
SH		 836 print_string(PRINT_ANY,
837 "table", "table %s ",
838 rtnl_rttable_n2a(table, b1, sizeof(b1)));
839
80d1c528 840 if (!(r->rtm_flags & RTM_F_CLONED)) {
663c3cb2
SH		 841 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) &&
842 filter.protocolmask != -1)
843 print_string(PRINT_ANY,
844 "protocol", "proto %s ",
845 rtnl_rtprot_n2a(r->rtm_protocol,
846 b1, sizeof(b1)));
847
848 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) &&
849 filter.scopemask != -1)
850 print_string(PRINT_ANY,
851 "scope", "scope %s ",
852 rtnl_rtscope_n2a(r->rtm_scope,
853 b1, sizeof(b1)));
aba5acdf 854 }
663c3cb2 855
aba5acdf 856 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
663c3cb2
SH		 857 const char *psrc
858 = rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]);
859
aba5acdf
SH		 860 /* Do not use format_host(). It is our local addr
861 and symbolic name will not be useful.
663c3cb2
SH		 862 */
863 if (is_json_context())
864 print_string(PRINT_JSON, "prefsrc", NULL, psrc);
865 else {
866 fprintf(fp, "src ");
867 print_color_string(PRINT_FP,
868 ifa_family_color(r->rtm_family),
869 NULL, "%s ", psrc);
870 }
871
aba5acdf 872 }
663c3cb2 873
ed7fdc95 874 if (tb[RTA_PRIORITY] && filter.metricmask != -1)
663c3cb2
SH		 875 print_uint(PRINT_ANY, "metric", "metric %u ",
876 rta_getattr_u32(tb[RTA_PRIORITY]));
b3ab1e68
SH		 877
878 print_rt_flags(fp, r->rtm_flags);
879
b0373bfb 880 if (tb[RTA_MARK]) {
9f1370c0 881 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
56f5daac 882
b0373bfb 883 if (mark) {
663c3cb2
SH		 884 if (is_json_context())
885 print_uint(PRINT_JSON, "mark", NULL, mark);
886 else if (mark >= 16)
887 print_0xhex(PRINT_FP, NULL,
888 "mark 0x%x ", mark);
b0373bfb 889 else
663c3cb2
SH		 890 print_uint(PRINT_FP, NULL,
891 "mark %u ", mark);
b0373bfb
ED		 892 }
893 }
aba5acdf 894
5782965a
SH		 895 if (tb[RTA_FLOW] && filter.realmmask != ~0U)
896 print_rta_flow(fp, tb[RTA_FLOW]);
82252cdc
LC		 897
898 if (tb[RTA_UID])
663c3cb2
SH		 899 print_uint(PRINT_ANY, "uid", "uid %u ",
900 rta_getattr_u32(tb[RTA_UID]));
daf30f6f 901
663c3cb2 902 if (r->rtm_family == AF_INET) {
9107c425 903 if (r->rtm_flags & RTM_F_CLONED)
663c3cb2 904 print_cache_flags(fp, r->rtm_flags);
6e41810e 905
9107c425
DA		 906 if (tb[RTA_CACHEINFO])
907 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
aba5acdf 908 } else if (r->rtm_family == AF_INET6) {
9107c425
DA		 909 if (tb[RTA_CACHEINFO])
910 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
aba5acdf 911 }
6e41810e 912
968272e7
SH		 913 if (tb[RTA_METRICS])
914 print_rta_metrics(fp, tb[RTA_METRICS]);
aba5acdf 915
1506d8d3
SH		 916 if (tb[RTA_IIF] && filter.iifmask != -1)
917 print_rta_if(fp, tb[RTA_IIF], "iif");
b3ab1e68 918
f48e1488
SH		 919 if (tb[RTA_MULTIPATH])
920 print_rta_multipath(fp, r, tb[RTA_MULTIPATH]);
8cfc2d47
SH		 921
922 if (tb[RTA_PREF])
923 print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));
924
c44d18ea 925 if (tb[RTA_TTL_PROPAGATE]) {
663c3cb2
SH		 926 bool propogate = rta_getattr_u8(tb[RTA_TTL_PROPAGATE]);
927
928 if (is_json_context())
929 print_bool(PRINT_JSON, "ttl-propogate", NULL,
930 propogate);
c44d18ea 931 else
663c3cb2
SH		 932 print_string(PRINT_FP, NULL,
933 "ttl-propogate %s",
934 propogate ? "enabled" : "disabled");
c44d18ea 935 }
663c3cb2
SH		 936
937 print_string(PRINT_FP, NULL, "\n", NULL);
938 close_json_object();
aba5acdf
SH		 939 fflush(fp);
940 return 0;
941}
942
1e529305 943static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
bd59e5b1 944 struct rtattr *rta, size_t len, struct rtnexthop *rtnh,
d1f28cf1 945 int *argcp, char ***argvp)
aba5acdf
SH		 946{
947 int argc = *argcp;
948 char **argv = *argvp;
949
950 while (++argv, --argc > 0) {
951 if (strcmp(*argv, "via") == 0) {
4d6c3796 952 inet_prefix addr;
93ae2835 953 int family;
56f5daac 954
aba5acdf 955 NEXT_ARG();
93ae2835
EB		 956 family = read_family(*argv);
957 if (family == AF_UNSPEC)
958 family = r->rtm_family;
959 else
960 NEXT_ARG();
961 get_addr(&addr, *argv, family);
4d6c3796
VB		 962 if (r->rtm_family == AF_UNSPEC)
963 r->rtm_family = addr.family;
93ae2835 964 if (addr.family == r->rtm_family) {
bd59e5b1
PS		 965 if (rta_addattr_l(rta, len, RTA_GATEWAY,
966 &addr.data, addr.bytelen))
967 return -1;
968 rtnh->rtnh_len += sizeof(struct rtattr)
969 + addr.bytelen;
93ae2835 970 } else {
bd59e5b1
PS		 971 if (rta_addattr_l(rta, len, RTA_VIA,
972 &addr.family, addr.bytelen + 2))
973 return -1;
974 rtnh->rtnh_len += RTA_SPACE(addr.bytelen + 2);
93ae2835 975 }
aba5acdf
SH		 976 } else if (strcmp(*argv, "dev") == 0) {
977 NEXT_ARG();
cc560825 978 rtnh->rtnh_ifindex = ll_name_to_index(*argv);
fe99adbc
SP		 979 if (!rtnh->rtnh_ifindex)
980 return nodev(*argv);
aba5acdf 981 } else if (strcmp(*argv, "weight") == 0) {
56f5daac
SH		 982 unsigned int w;
983
aba5acdf
SH		 984 NEXT_ARG();
985 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
986 invarg("\"weight\" is invalid\n", *argv);
987 rtnh->rtnh_hops = w - 1;
988 } else if (strcmp(*argv, "onlink") == 0) {
989 rtnh->rtnh_flags |= RTNH_F_ONLINK;
f4f6d640
PM		 990 } else if (matches(*argv, "realms") == 0) {
991 __u32 realm;
56f5daac 992
f4f6d640 993 NEXT_ARG();
d583e88e 994 if (get_rt_realms_or_raw(&realm, *argv))
f4f6d640 995 invarg("\"realm\" value is invalid\n", *argv);
bd59e5b1
PS		 996 if (rta_addattr32(rta, len, RTA_FLOW, realm))
997 return -1;
f4f6d640 998 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
1e529305 999 } else if (strcmp(*argv, "encap") == 0) {
bd59e5b1 1000 int old_len = rta->rta_len;
1e529305 1001
bd59e5b1
PS		 1002 if (lwt_parse_encap(rta, len, &argc, &argv))
1003 return -1;
1004 rtnh->rtnh_len += rta->rta_len - old_len;
ecc509f9
RP		 1005 } else if (strcmp(*argv, "as") == 0) {
1006 inet_prefix addr;
1007
1008 NEXT_ARG();
1009 if (strcmp(*argv, "to") == 0)
1010 NEXT_ARG();
1011 get_addr(&addr, *argv, r->rtm_family);
bd59e5b1
PS		 1012 if (rta_addattr_l(rta, len, RTA_NEWDST,
1013 &addr.data, addr.bytelen))
1014 return -1;
ecc509f9 1015 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
aba5acdf
SH		 1016 } else
1017 break;
1018 }
1019 *argcp = argc;
1020 *argvp = argv;
1021 return 0;
1022}
1023
d1f28cf1
SH		 1024static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
1025 int argc, char **argv)
aba5acdf 1026{
bd59e5b1 1027 char buf[4096];
56f5daac 1028 struct rtattr *rta = (void *)buf;
aba5acdf
SH		 1029 struct rtnexthop *rtnh;
1030
1031 rta->rta_type = RTA_MULTIPATH;
1032 rta->rta_len = RTA_LENGTH(0);
1033 rtnh = RTA_DATA(rta);
1034
1035 while (argc > 0) {
1036 if (strcmp(*argv, "nexthop") != 0) {
1037 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
1038 exit(-1);
1039 }
1040 if (argc <= 1) {
1041 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
1042 exit(-1);
1043 }
1044 memset(rtnh, 0, sizeof(*rtnh));
1045 rtnh->rtnh_len = sizeof(*rtnh);
1046 rta->rta_len += rtnh->rtnh_len;
bd59e5b1 1047 if (parse_one_nh(n, r, rta, 4096, rtnh, &argc, &argv)) {
ee53b42f
JS		 1048 fprintf(stderr, "Error: cannot parse nexthop\n");
1049 exit(-1);
1050 }
aba5acdf
SH		 1051 rtnh = RTNH_NEXT(rtnh);
1052 }
1053
1054 if (rta->rta_len > RTA_LENGTH(0))
bd59e5b1
PS		 1055 return addattr_l(n, 4096, RTA_MULTIPATH,
1056 RTA_DATA(rta), RTA_PAYLOAD(rta));
aba5acdf
SH		 1057 return 0;
1058}
1059
56f5daac 1060static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
aba5acdf 1061{
aba5acdf 1062 struct {
4806867a
SH		 1063 struct nlmsghdr n;
1064 struct rtmsg r;
bd59e5b1 1065 char buf[4096];
d17b136f
PS		 1066 } req = {
1067 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1068 .n.nlmsg_flags = NLM_F_REQUEST | flags,
1069 .n.nlmsg_type = cmd,
1070 .r.rtm_family = preferred_family,
1071 .r.rtm_table = RT_TABLE_MAIN,
1072 .r.rtm_scope = RT_SCOPE_NOWHERE,
1073 };
aba5acdf 1074 char mxbuf[256];
56f5daac
SH		 1075 struct rtattr *mxrta = (void *)mxbuf;
1076 unsigned int mxlock = 0;
aba5acdf
SH		 1077 char *d = NULL;
1078 int gw_ok = 0;
1079 int dst_ok = 0;
1080 int nhs_ok = 0;
1081 int scope_ok = 0;
1082 int table_ok = 0;
54e0b2e7 1083 int raw = 0;
f638e9f7 1084 int type_ok = 0;
aba5acdf 1085
aba5acdf
SH		 1086 if (cmd != RTM_DELROUTE) {
1087 req.r.rtm_protocol = RTPROT_BOOT;
1088 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1089 req.r.rtm_type = RTN_UNICAST;
1090 }
1091
1092 mxrta->rta_type = RTA_METRICS;
1093 mxrta->rta_len = RTA_LENGTH(0);
1094
1095 while (argc > 0) {
1096 if (strcmp(*argv, "src") == 0) {
1097 inet_prefix addr;
56f5daac 1098
aba5acdf
SH		 1099 NEXT_ARG();
1100 get_addr(&addr, *argv, req.r.rtm_family);
1101 if (req.r.rtm_family == AF_UNSPEC)
1102 req.r.rtm_family = addr.family;
21fef525
SH		 1103 addattr_l(&req.n, sizeof(req),
1104 RTA_PREFSRC, &addr.data, addr.bytelen);
6f7a9f4d
EB		 1105 } else if (strcmp(*argv, "as") == 0) {
1106 inet_prefix addr;
56f5daac 1107
6f7a9f4d
EB		 1108 NEXT_ARG();
1109 if (strcmp(*argv, "to") == 0) {
1110 NEXT_ARG();
1111 }
1112 get_addr(&addr, *argv, req.r.rtm_family);
1113 if (req.r.rtm_family == AF_UNSPEC)
1114 req.r.rtm_family = addr.family;
21fef525
SH		 1115 addattr_l(&req.n, sizeof(req),
1116 RTA_NEWDST, &addr.data, addr.bytelen);
aba5acdf
SH		 1117 } else if (strcmp(*argv, "via") == 0) {
1118 inet_prefix addr;
93ae2835 1119 int family;
56f5daac 1120
11f2c753
DA		 1121 if (gw_ok) {
1122 invarg("use nexthop syntax to specify multiple via\n",
1123 *argv);
1124 }
aba5acdf
SH		 1125 gw_ok = 1;
1126 NEXT_ARG();
93ae2835
EB		 1127 family = read_family(*argv);
1128 if (family == AF_UNSPEC)
1129 family = req.r.rtm_family;
1130 else
1131 NEXT_ARG();
1132 get_addr(&addr, *argv, family);
aba5acdf
SH		 1133 if (req.r.rtm_family == AF_UNSPEC)
1134 req.r.rtm_family = addr.family;
93ae2835 1135 if (addr.family == req.r.rtm_family)
ecc509f9
RP		 1136 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
1137 &addr.data, addr.bytelen);
93ae2835 1138 else
ecc509f9
RP		 1139 addattr_l(&req.n, sizeof(req), RTA_VIA,
1140 &addr.family, addr.bytelen+2);
aba5acdf
SH		 1141 } else if (strcmp(*argv, "from") == 0) {
1142 inet_prefix addr;
56f5daac 1143
aba5acdf
SH		 1144 NEXT_ARG();
1145 get_prefix(&addr, *argv, req.r.rtm_family);
1146 if (req.r.rtm_family == AF_UNSPEC)
1147 req.r.rtm_family = addr.family;
1148 if (addr.bytelen)
1149 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1150 req.r.rtm_src_len = addr.bitlen;
1151 } else if (strcmp(*argv, "tos") == 0 ||
1152 matches(*argv, "dsfield") == 0) {
1153 __u32 tos;
56f5daac 1154
aba5acdf
SH		 1155 NEXT_ARG();
1156 if (rtnl_dsfield_a2n(&tos, *argv))
1157 invarg("\"tos\" value is invalid\n", *argv);
1158 req.r.rtm_tos = tos;
56f5daac 1159 } else if (strcmp(*argv, "expires") == 0) {
68eede25 1160 __u32 expires;
56f5daac 1161
68eede25
HL		 1162 NEXT_ARG();
1163 if (get_u32(&expires, *argv, 0))
1164 invarg("\"expires\" value is invalid\n", *argv);
eecc0069 1165 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
aba5acdf
SH		 1166 } else if (matches(*argv, "metric") == 0 ||
1167 matches(*argv, "priority") == 0 ||
194e9b85 1168 strcmp(*argv, "preference") == 0) {
aba5acdf 1169 __u32 metric;
56f5daac 1170
aba5acdf
SH		 1171 NEXT_ARG();
1172 if (get_u32(&metric, *argv, 0))
1173 invarg("\"metric\" value is invalid\n", *argv);
1174 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
1175 } else if (strcmp(*argv, "scope") == 0) {
f332d169 1176 __u32 scope = 0;
56f5daac 1177
aba5acdf
SH		 1178 NEXT_ARG();
1179 if (rtnl_rtscope_a2n(&scope, *argv))
1180 invarg("invalid \"scope\" value\n", *argv);
1181 req.r.rtm_scope = scope;
1182 scope_ok = 1;
1183 } else if (strcmp(*argv, "mtu") == 0) {
56f5daac
SH		 1184 unsigned int mtu;
1185
aba5acdf
SH		 1186 NEXT_ARG();
1187 if (strcmp(*argv, "lock") == 0) {
1188 mxlock |= (1<<RTAX_MTU);
1189 NEXT_ARG();
1190 }
1191 if (get_unsigned(&mtu, *argv, 0))
1192 invarg("\"mtu\" value is invalid\n", *argv);
1193 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
71e58151 1194 } else if (strcmp(*argv, "hoplimit") == 0) {
56f5daac
SH		 1195 unsigned int hoplimit;
1196
71e58151
GBY		 1197 NEXT_ARG();
1198 if (strcmp(*argv, "lock") == 0) {
1199 mxlock |= (1<<RTAX_HOPLIMIT);
1200 NEXT_ARG();
1201 }
ea6cbab7 1202 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
71e58151
GBY		 1203 invarg("\"hoplimit\" value is invalid\n", *argv);
1204 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
aba5acdf 1205 } else if (strcmp(*argv, "advmss") == 0) {
56f5daac
SH		 1206 unsigned int mss;
1207
aba5acdf
SH		 1208 NEXT_ARG();
1209 if (strcmp(*argv, "lock") == 0) {
1210 mxlock |= (1<<RTAX_ADVMSS);
1211 NEXT_ARG();
1212 }
1213 if (get_unsigned(&mss, *argv, 0))
1214 invarg("\"mss\" value is invalid\n", *argv);
1215 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
aba5acdf 1216 } else if (matches(*argv, "reordering") == 0) {
56f5daac
SH		 1217 unsigned int reord;
1218
aba5acdf
SH		 1219 NEXT_ARG();
1220 if (strcmp(*argv, "lock") == 0) {
1221 mxlock |= (1<<RTAX_REORDERING);
1222 NEXT_ARG();
1223 }
1224 if (get_unsigned(&reord, *argv, 0))
1225 invarg("\"reordering\" value is invalid\n", *argv);
1226 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
aba5acdf 1227 } else if (strcmp(*argv, "rtt") == 0) {
56f5daac
SH		 1228 unsigned int rtt;
1229
aba5acdf
SH		 1230 NEXT_ARG();
1231 if (strcmp(*argv, "lock") == 0) {
1232 mxlock |= (1<<RTAX_RTT);
1233 NEXT_ARG();
1234 }
81d03dc3 1235 if (get_time_rtt(&rtt, *argv, &raw))
aba5acdf 1236 invarg("\"rtt\" value is invalid\n", *argv);
0612519e 1237 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
54e0b2e7
RJ		 1238 (raw) ? rtt : rtt * 8);
1239 } else if (strcmp(*argv, "rto_min") == 0) {
56f5daac
SH		 1240 unsigned int rto_min;
1241
54e0b2e7
RJ		 1242 NEXT_ARG();
1243 mxlock |= (1<<RTAX_RTO_MIN);
81d03dc3 1244 if (get_time_rtt(&rto_min, *argv, &raw))
54e0b2e7
RJ		 1245 invarg("\"rto_min\" value is invalid\n",
1246 *argv);
1247 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1248 rto_min);
aba5acdf 1249 } else if (matches(*argv, "window") == 0) {
56f5daac
SH		 1250 unsigned int win;
1251
aba5acdf
SH		 1252 NEXT_ARG();
1253 if (strcmp(*argv, "lock") == 0) {
1254 mxlock |= (1<<RTAX_WINDOW);
1255 NEXT_ARG();
1256 }
1257 if (get_unsigned(&win, *argv, 0))
1258 invarg("\"window\" value is invalid\n", *argv);
1259 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1260 } else if (matches(*argv, "cwnd") == 0) {
56f5daac
SH		 1261 unsigned int win;
1262
aba5acdf
SH		 1263 NEXT_ARG();
1264 if (strcmp(*argv, "lock") == 0) {
1265 mxlock |= (1<<RTAX_CWND);
1266 NEXT_ARG();
1267 }
1268 if (get_unsigned(&win, *argv, 0))
1269 invarg("\"cwnd\" value is invalid\n", *argv);
1270 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
a1f1143e 1271 } else if (matches(*argv, "initcwnd") == 0) {
56f5daac
SH		 1272 unsigned int win;
1273
a1f1143e
VW		 1274 NEXT_ARG();
1275 if (strcmp(*argv, "lock") == 0) {
1276 mxlock |= (1<<RTAX_INITCWND);
1277 NEXT_ARG();
1278 }
1279 if (get_unsigned(&win, *argv, 0))
1280 invarg("\"initcwnd\" value is invalid\n", *argv);
21fef525
SH		 1281 rta_addattr32(mxrta, sizeof(mxbuf),
1282 RTAX_INITCWND, win);
f5fd8003 1283 } else if (matches(*argv, "initrwnd") == 0) {
56f5daac
SH		 1284 unsigned int win;
1285
f5fd8003 1286 NEXT_ARG();
1287 if (strcmp(*argv, "lock") == 0) {
1288 mxlock |= (1<<RTAX_INITRWND);
1289 NEXT_ARG();
1290 }
1291 if (get_unsigned(&win, *argv, 0))
1292 invarg("\"initrwnd\" value is invalid\n", *argv);
21fef525
SH		 1293 rta_addattr32(mxrta, sizeof(mxbuf),
1294 RTAX_INITRWND, win);
29d1f730
FW		 1295 } else if (matches(*argv, "features") == 0) {
1296 unsigned int features = 0;
1297
1298 while (argc > 0) {
1299 NEXT_ARG();
1300
1301 if (strcmp(*argv, "ecn") == 0)
1302 features |= RTAX_FEATURE_ECN;
1303 else
1304 invarg("\"features\" value not valid\n", *argv);
1305 break;
1306 }
1307
21fef525
SH		 1308 rta_addattr32(mxrta, sizeof(mxbuf),
1309 RTAX_FEATURES, features);
b37f2c89 1310 } else if (matches(*argv, "quickack") == 0) {
56f5daac
SH		 1311 unsigned int quickack;
1312
b37f2c89
CW		 1313 NEXT_ARG();
1314 if (get_unsigned(&quickack, *argv, 0))
1315 invarg("\"quickack\" value is invalid\n", *argv);
1316 if (quickack != 1 && quickack != 0)
1317 invarg("\"quickack\" value should be 0 or 1\n", *argv);
21fef525
SH		 1318 rta_addattr32(mxrta, sizeof(mxbuf),
1319 RTAX_QUICKACK, quickack);
6ef87f9c
DB		 1320 } else if (matches(*argv, "congctl") == 0) {
1321 NEXT_ARG();
1322 if (strcmp(*argv, "lock") == 0) {
1323 mxlock |= 1 << RTAX_CC_ALGO;
1324 NEXT_ARG();
1325 }
1326 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1327 strlen(*argv));
aba5acdf 1328 } else if (matches(*argv, "rttvar") == 0) {
56f5daac
SH		 1329 unsigned int win;
1330
aba5acdf
SH		 1331 NEXT_ARG();
1332 if (strcmp(*argv, "lock") == 0) {
1333 mxlock |= (1<<RTAX_RTTVAR);
1334 NEXT_ARG();
1335 }
81d03dc3 1336 if (get_time_rtt(&win, *argv, &raw))
aba5acdf 1337 invarg("\"rttvar\" value is invalid\n", *argv);
54e0b2e7
RJ		 1338 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1339 (raw) ? win : win * 4);
aba5acdf 1340 } else if (matches(*argv, "ssthresh") == 0) {
56f5daac
SH		 1341 unsigned int win;
1342
aba5acdf
SH		 1343 NEXT_ARG();
1344 if (strcmp(*argv, "lock") == 0) {
1345 mxlock |= (1<<RTAX_SSTHRESH);
1346 NEXT_ARG();
1347 }
1348 if (get_unsigned(&win, *argv, 0))
1349 invarg("\"ssthresh\" value is invalid\n", *argv);
1350 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1351 } else if (matches(*argv, "realms") == 0) {
1352 __u32 realm;
56f5daac 1353
aba5acdf 1354 NEXT_ARG();
d583e88e 1355 if (get_rt_realms_or_raw(&realm, *argv))
aba5acdf
SH		 1356 invarg("\"realm\" value is invalid\n", *argv);
1357 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1358 } else if (strcmp(*argv, "onlink") == 0) {
1359 req.r.rtm_flags |= RTNH_F_ONLINK;
aba5acdf
SH		 1360 } else if (strcmp(*argv, "nexthop") == 0) {
1361 nhs_ok = 1;
1362 break;
1363 } else if (matches(*argv, "protocol") == 0) {
f332d169 1364 __u32 prot;
56f5daac 1365
aba5acdf
SH		 1366 NEXT_ARG();
1367 if (rtnl_rtprot_a2n(&prot, *argv))
1368 invarg("\"protocol\" value is invalid\n", *argv);
1369 req.r.rtm_protocol = prot;
aba5acdf 1370 } else if (matches(*argv, "table") == 0) {
f332d169 1371 __u32 tid;
56f5daac 1372
aba5acdf
SH		 1373 NEXT_ARG();
1374 if (rtnl_rttable_a2n(&tid, *argv))
1375 invarg("\"table\" value is invalid\n", *argv);
34e95647
PM		 1376 if (tid < 256)
1377 req.r.rtm_table = tid;
1378 else {
1379 req.r.rtm_table = RT_TABLE_UNSPEC;
1380 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1381 }
aba5acdf 1382 table_ok = 1;
0130f012
DA		 1383 } else if (matches(*argv, "vrf") == 0) {
1384 __u32 tid;
1385
1386 NEXT_ARG();
1387 tid = ipvrf_get_table(*argv);
1388 if (tid == 0)
1389 invarg("Invalid VRF\n", *argv);
1390 if (tid < 256)
1391 req.r.rtm_table = tid;
1392 else {
1393 req.r.rtm_table = RT_TABLE_UNSPEC;
1394 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1395 }
1396 table_ok = 1;
aba5acdf
SH		 1397 } else if (strcmp(*argv, "dev") == 0 ||
1398 strcmp(*argv, "oif") == 0) {
1399 NEXT_ARG();
1400 d = *argv;
194e9b85
LR		 1401 } else if (matches(*argv, "pref") == 0) {
1402 __u8 pref;
56f5daac 1403
194e9b85
LR		 1404 NEXT_ARG();
1405 if (strcmp(*argv, "low") == 0)
1406 pref = ICMPV6_ROUTER_PREF_LOW;
1407 else if (strcmp(*argv, "medium") == 0)
1408 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1409 else if (strcmp(*argv, "high") == 0)
1410 pref = ICMPV6_ROUTER_PREF_HIGH;
1411 else if (get_u8(&pref, *argv, 0))
1412 invarg("\"pref\" value is invalid\n", *argv);
1413 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1e529305
RP		 1414 } else if (strcmp(*argv, "encap") == 0) {
1415 char buf[1024];
56f5daac 1416 struct rtattr *rta = (void *)buf;
1e529305
RP		 1417
1418 rta->rta_type = RTA_ENCAP;
1419 rta->rta_len = RTA_LENGTH(0);
1420
1421 lwt_parse_encap(rta, sizeof(buf), &argc, &argv);
1422
1423 if (rta->rta_len > RTA_LENGTH(0))
21fef525
SH		 1424 addraw_l(&req.n, 1024
1425 , RTA_DATA(rta), RTA_PAYLOAD(rta));
c44d18ea
RS		 1426 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1427 __u8 ttl_prop;
1428
1429 NEXT_ARG();
1430 if (matches(*argv, "enabled") == 0)
1431 ttl_prop = 1;
1432 else if (matches(*argv, "disabled") == 0)
1433 ttl_prop = 0;
1434 else
1435 invarg("\"ttl-propagate\" value is invalid\n",
1436 *argv);
1437
1438 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1439 ttl_prop);
e54ed380
CP		 1440 } else if (matches(*argv, "fastopen_no_cookie") == 0) {
1441 unsigned int fastopen_no_cookie;
1442
1443 NEXT_ARG();
1444 if (get_unsigned(&fastopen_no_cookie, *argv, 0))
1445 invarg("\"fastopen_no_cookie\" value is invalid\n", *argv);
1446 if (fastopen_no_cookie != 1 && fastopen_no_cookie != 0)
1447 invarg("\"fastopen_no_cookie\" value should be 0 or 1\n", *argv);
1448 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FASTOPEN_NO_COOKIE, fastopen_no_cookie);
aba5acdf
SH		 1449 } else {
1450 int type;
1451 inet_prefix dst;
1452
1453 if (strcmp(*argv, "to") == 0) {
1454 NEXT_ARG();
1455 }
1456 if ((**argv < '0' || **argv > '9') &&
1457 rtnl_rtntype_a2n(&type, *argv) == 0) {
1458 NEXT_ARG();
1459 req.r.rtm_type = type;
f638e9f7 1460 type_ok = 1;
aba5acdf
SH		 1461 }
1462
1463 if (matches(*argv, "help") == 0)
1464 usage();
1465 if (dst_ok)
1466 duparg2("to", *argv);
1467 get_prefix(&dst, *argv, req.r.rtm_family);
1468 if (req.r.rtm_family == AF_UNSPEC)
1469 req.r.rtm_family = dst.family;
1470 req.r.rtm_dst_len = dst.bitlen;
1471 dst_ok = 1;
1472 if (dst.bytelen)
21fef525
SH		 1473 addattr_l(&req.n, sizeof(req),
1474 RTA_DST, &dst.data, dst.bytelen);
aba5acdf
SH		 1475 }
1476 argc--; argv++;
1477 }
1478
922b4822
PS		 1479 if (!dst_ok)
1480 usage();
1481
7b201d60 1482 if (d) {
cc560825 1483 int idx = ll_name_to_index(d);
aba5acdf 1484
fe99adbc
SP		 1485 if (!idx)
1486 return nodev(d);
7b201d60 1487 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
aba5acdf
SH		 1488 }
1489
1490 if (mxrta->rta_len > RTA_LENGTH(0)) {
1491 if (mxlock)
1492 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1493 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1494 }
1495
bd59e5b1
PS		 1496 if (nhs_ok && parse_nexthops(&req.n, &req.r, argc, argv))
1497 return -1;
aba5acdf 1498
f638e9f7
RP		 1499 if (req.r.rtm_family == AF_UNSPEC)
1500 req.r.rtm_family = AF_INET;
1501
aba5acdf
SH		 1502 if (!table_ok) {
1503 if (req.r.rtm_type == RTN_LOCAL ||
1504 req.r.rtm_type == RTN_BROADCAST ||
1505 req.r.rtm_type == RTN_NAT ||
1506 req.r.rtm_type == RTN_ANYCAST)
1507 req.r.rtm_table = RT_TABLE_LOCAL;
1508 }
1509 if (!scope_ok) {
f638e9f7
RP		 1510 if (req.r.rtm_family == AF_INET6 ||
1511 req.r.rtm_family == AF_MPLS)
1512 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1513 else if (req.r.rtm_type == RTN_LOCAL ||
1514 req.r.rtm_type == RTN_NAT)
aba5acdf
SH		 1515 req.r.rtm_scope = RT_SCOPE_HOST;
1516 else if (req.r.rtm_type == RTN_BROADCAST ||
1517 req.r.rtm_type == RTN_MULTICAST ||
1518 req.r.rtm_type == RTN_ANYCAST)
1519 req.r.rtm_scope = RT_SCOPE_LINK;
1520 else if (req.r.rtm_type == RTN_UNICAST ||
1521 req.r.rtm_type == RTN_UNSPEC) {
1522 if (cmd == RTM_DELROUTE)
1523 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1524 else if (!gw_ok && !nhs_ok)
1525 req.r.rtm_scope = RT_SCOPE_LINK;
1526 }
1527 }
1528
f638e9f7
RP		 1529 if (!type_ok && req.r.rtm_family == AF_MPLS)
1530 req.r.rtm_type = RTN_UNICAST;
aba5acdf 1531
86bf43c7 1532 if (rtnl_talk(&rth, &req.n, NULL) < 0)
d58ba4ba 1533 return -2;
aba5acdf
SH		 1534
1535 return 0;
1536}
1537
1538static int rtnl_rtcache_request(struct rtnl_handle *rth, int family)
1539{
1540 struct {
1541 struct nlmsghdr nlh;
1542 struct rtmsg rtm;
d17b136f
PS		 1543 } req = {
1544 .nlh.nlmsg_len = sizeof(req),
1545 .nlh.nlmsg_type = RTM_GETROUTE,
1546 .nlh.nlmsg_flags = NLM_F_ROOT | NLM_F_REQUEST,
1547 .nlh.nlmsg_seq = rth->dump = ++rth->seq,
1548 .rtm.rtm_family = family,
1549 .rtm.rtm_flags = RTM_F_CLONED,
1550 };
1551 struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK };
aba5acdf 1552
56f5daac 1553 return sendto(rth->fd, (void *)&req, sizeof(req), 0, (struct sockaddr *)&nladdr, sizeof(nladdr));
aba5acdf
SH		 1554}
1555
1556static int iproute_flush_cache(void)
1557{
1558#define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1559
1560 int len;
56f5daac 1561 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
aba5acdf
SH		 1562 char *buffer = "-1";
1563
1564 if (flush_fd < 0) {
56f5daac 1565 fprintf(stderr, "Cannot open \"%s\": %s\n",
9827fa57 1566 ROUTE_FLUSH_PATH, strerror(errno));
aba5acdf
SH		 1567 return -1;
1568 }
1569
56f5daac 1570 len = strlen(buffer);
ae665a52 1571
56f5daac
SH		 1572 if ((write(flush_fd, (void *)buffer, len)) < len) {
1573 fprintf(stderr, "Cannot flush routing cache\n");
25352af7 1574 close(flush_fd);
aba5acdf
SH		 1575 return -1;
1576 }
1577 close(flush_fd);
1578 return 0;
1579}
1580
76c61b34
PE		 1581static __u32 route_dump_magic = 0x45311224;
1582
d1f28cf1
SH		 1583static int save_route(const struct sockaddr_nl *who, struct nlmsghdr *n,
1584 void *arg)
f4ff11e3
DS		 1585{
1586 int ret;
1587 int len = n->nlmsg_len;
1588 struct rtmsg *r = NLMSG_DATA(n);
1589 struct rtattr *tb[RTA_MAX+1];
f3a2ddc1 1590 int host_len;
f4ff11e3 1591
f3a2ddc1 1592 host_len = af_bit_len(r->rtm_family);
f4ff11e3
DS		 1593 len -= NLMSG_LENGTH(sizeof(*r));
1594 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1595
1596 if (!filter_nlmsg(n, tb, host_len))
1597 return 0;
1598
1599 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1600 if ((ret > 0) && (ret != n->nlmsg_len)) {
1601 fprintf(stderr, "Short write while saving nlmsg\n");
1602 ret = -EIO;
1603 }
1604
1605 return ret == n->nlmsg_len ? 0 : ret;
1606}
aba5acdf 1607
76c61b34
PE		 1608static int save_route_prep(void)
1609{
1610 int ret;
1611
1612 if (isatty(STDOUT_FILENO)) {
14645ec2 1613 fprintf(stderr, "Not sending a binary stream to stdout\n");
76c61b34
PE		 1614 return -1;
1615 }
1616
1617 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1618 if (ret != sizeof(route_dump_magic)) {
1619 fprintf(stderr, "Can't write magic to dump file\n");
1620 return -1;
1621 }
1622
1623 return 0;
1624}
1625
432e5f97
SH		 1626static int iproute_flush(int do_ipv6, rtnl_filter_t filter_fn)
1627{
1628 time_t start = time(0);
1629 char flushb[4096-512];
1630 int round = 0;
1631 int ret;
1632
1633 if (filter.cloned) {
1634 if (do_ipv6 != AF_INET6) {
1635 iproute_flush_cache();
1636 if (show_stats)
1637 printf("*** IPv4 routing cache is flushed.\n");
1638 }
1639 if (do_ipv6 == AF_INET)
1640 return 0;
1641 }
1642
1643 filter.flushb = flushb;
1644 filter.flushp = 0;
1645 filter.flushe = sizeof(flushb);
1646
1647 for (;;) {
bfb27dfa 1648 if (rtnl_routedump_req(&rth, do_ipv6) < 0) {
432e5f97
SH		 1649 perror("Cannot send dump request");
1650 return -2;
1651 }
1652 filter.flushed = 0;
1653 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1654 fprintf(stderr, "Flush terminated\n");
1655 return -2;
1656 }
1657 if (filter.flushed == 0) {
1658 if (show_stats) {
1659 if (round == 0 &&
1660 (!filter.cloned || do_ipv6 == AF_INET6))
1661 printf("Nothing to flush.\n");
1662 else
1663 printf("*** Flush is complete after %d round%s ***\n",
1664 round, round > 1 ? "s" : "");
1665 }
1666 fflush(stdout);
1667 return 0;
1668 }
1669 round++;
1670 ret = flush_update();
1671 if (ret < 0)
1672 return ret;
1673
1674 if (time(0) - start > 30) {
1675 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1676 (long)(time(0) - start), filter.flushed);
1677 return -1;
1678 }
1679
1680 if (show_stats) {
1681 printf("\n*** Round %d, deleting %d entries ***\n",
1682 round, filter.flushed);
1683 fflush(stdout);
1684 }
1685 }
1686}
1687
f4ff11e3 1688static int iproute_list_flush_or_save(int argc, char **argv, int action)
aba5acdf
SH		 1689{
1690 int do_ipv6 = preferred_family;
aba5acdf
SH		 1691 char *id = NULL;
1692 char *od = NULL;
b0373bfb 1693 unsigned int mark = 0;
f4ff11e3
DS		 1694 rtnl_filter_t filter_fn;
1695
76c61b34
PE		 1696 if (action == IPROUTE_SAVE) {
1697 if (save_route_prep())
1698 return -1;
1699
f4ff11e3 1700 filter_fn = save_route;
76c61b34 1701 } else
f4ff11e3 1702 filter_fn = print_route;
aba5acdf 1703
093b7646 1704 iproute_reset_filter(0);
aba5acdf
SH		 1705 filter.tb = RT_TABLE_MAIN;
1706
f4ff11e3 1707 if ((action == IPROUTE_FLUSH) && argc <= 0) {
aba5acdf
SH		 1708 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1709 return -1;
1710 }
1711
1712 while (argc > 0) {
1713 if (matches(*argv, "table") == 0) {
f332d169 1714 __u32 tid;
56f5daac 1715
aba5acdf
SH		 1716 NEXT_ARG();
1717 if (rtnl_rttable_a2n(&tid, *argv)) {
1718 if (strcmp(*argv, "all") == 0) {
bd4bcdad 1719 filter.tb = 0;
aba5acdf 1720 } else if (strcmp(*argv, "cache") == 0) {
bd4bcdad 1721 filter.cloned = 1;
aba5acdf
SH		 1722 } else if (strcmp(*argv, "help") == 0) {
1723 usage();
1724 } else {
1725 invarg("table id value is invalid\n", *argv);
1726 }
bd4bcdad
PM		 1727 } else
1728 filter.tb = tid;
0130f012
DA		 1729 } else if (matches(*argv, "vrf") == 0) {
1730 __u32 tid;
1731
1732 NEXT_ARG();
1733 tid = ipvrf_get_table(*argv);
1734 if (tid == 0)
1735 invarg("Invalid VRF\n", *argv);
1736 filter.tb = tid;
1737 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
aba5acdf
SH		 1738 } else if (matches(*argv, "cached") == 0 ||
1739 matches(*argv, "cloned") == 0) {
bd4bcdad 1740 filter.cloned = 1;
aba5acdf
SH		 1741 } else if (strcmp(*argv, "tos") == 0 ||
1742 matches(*argv, "dsfield") == 0) {
1743 __u32 tos;
56f5daac 1744
aba5acdf
SH		 1745 NEXT_ARG();
1746 if (rtnl_dsfield_a2n(&tos, *argv))
1747 invarg("TOS value is invalid\n", *argv);
1748 filter.tos = tos;
1749 filter.tosmask = -1;
1750 } else if (matches(*argv, "protocol") == 0) {
f332d169 1751 __u32 prot = 0;
56f5daac 1752
aba5acdf
SH		 1753 NEXT_ARG();
1754 filter.protocolmask = -1;
1755 if (rtnl_rtprot_a2n(&prot, *argv)) {
1756 if (strcmp(*argv, "all") != 0)
1757 invarg("invalid \"protocol\"\n", *argv);
1758 prot = 0;
1759 filter.protocolmask = 0;
1760 }
1761 filter.protocol = prot;
1762 } else if (matches(*argv, "scope") == 0) {
f332d169 1763 __u32 scope = 0;
56f5daac 1764
aba5acdf
SH		 1765 NEXT_ARG();
1766 filter.scopemask = -1;
1767 if (rtnl_rtscope_a2n(&scope, *argv)) {
1768 if (strcmp(*argv, "all") != 0)
1769 invarg("invalid \"scope\"\n", *argv);
1770 scope = RT_SCOPE_NOWHERE;
1771 filter.scopemask = 0;
1772 }
1773 filter.scope = scope;
1774 } else if (matches(*argv, "type") == 0) {
1775 int type;
56f5daac 1776
aba5acdf 1777 NEXT_ARG();
aba5acdf
SH		 1778 if (rtnl_rtntype_a2n(&type, *argv))
1779 invarg("node type value is invalid\n", *argv);
d84b1878 1780 filter.typemask = (1<<type);
aba5acdf
SH		 1781 } else if (strcmp(*argv, "dev") == 0 ||
1782 strcmp(*argv, "oif") == 0) {
1783 NEXT_ARG();
1784 od = *argv;
1785 } else if (strcmp(*argv, "iif") == 0) {
1786 NEXT_ARG();
1787 id = *argv;
b0373bfb
ED		 1788 } else if (strcmp(*argv, "mark") == 0) {
1789 NEXT_ARG();
7c66d898
PS		 1790 if (get_unsigned(&mark, *argv, 0))
1791 invarg("invalid mark value", *argv);
b0373bfb 1792 filter.markmask = -1;
ed7fdc95 1793 } else if (matches(*argv, "metric") == 0 ||
80d1c528
SH		 1794 matches(*argv, "priority") == 0 ||
1795 strcmp(*argv, "preference") == 0) {
ed7fdc95
AZ		 1796 __u32 metric;
1797
1798 NEXT_ARG();
1799 if (get_u32(&metric, *argv, 0))
1800 invarg("\"metric\" value is invalid\n", *argv);
1801 filter.metric = metric;
1802 filter.metricmask = -1;
aba5acdf 1803 } else if (strcmp(*argv, "via") == 0) {
93ae2835 1804 int family;
56f5daac 1805
aba5acdf 1806 NEXT_ARG();
93ae2835
EB		 1807 family = read_family(*argv);
1808 if (family == AF_UNSPEC)
1809 family = do_ipv6;
1810 else
1811 NEXT_ARG();
1812 get_prefix(&filter.rvia, *argv, family);
aba5acdf
SH		 1813 } else if (strcmp(*argv, "src") == 0) {
1814 NEXT_ARG();
1815 get_prefix(&filter.rprefsrc, *argv, do_ipv6);
1816 } else if (matches(*argv, "realms") == 0) {
1817 __u32 realm;
56f5daac 1818
aba5acdf 1819 NEXT_ARG();
d583e88e 1820 if (get_rt_realms_or_raw(&realm, *argv))
aba5acdf
SH		 1821 invarg("invalid realms\n", *argv);
1822 filter.realm = realm;
1823 filter.realmmask = ~0U;
1824 if ((filter.realm&0xFFFF) == 0 &&
1825 (*argv)[strlen(*argv) - 1] == '/')
1826 filter.realmmask &= ~0xFFFF;
1827 if ((filter.realm&0xFFFF0000U) == 0 &&
1828 (strchr(*argv, '/') == NULL ||
1829 (*argv)[0] == '/'))
1830 filter.realmmask &= ~0xFFFF0000U;
1831 } else if (matches(*argv, "from") == 0) {
1832 NEXT_ARG();
1833 if (matches(*argv, "root") == 0) {
1834 NEXT_ARG();
1835 get_prefix(&filter.rsrc, *argv, do_ipv6);
1836 } else if (matches(*argv, "match") == 0) {
1837 NEXT_ARG();
1838 get_prefix(&filter.msrc, *argv, do_ipv6);
1839 } else {
1840 if (matches(*argv, "exact") == 0) {
1841 NEXT_ARG();
1842 }
1843 get_prefix(&filter.msrc, *argv, do_ipv6);
1844 filter.rsrc = filter.msrc;
1845 }
1846 } else {
1847 if (matches(*argv, "to") == 0) {
1848 NEXT_ARG();
1849 }
1850 if (matches(*argv, "root") == 0) {
1851 NEXT_ARG();
1852 get_prefix(&filter.rdst, *argv, do_ipv6);
1853 } else if (matches(*argv, "match") == 0) {
1854 NEXT_ARG();
1855 get_prefix(&filter.mdst, *argv, do_ipv6);
1856 } else {
1857 if (matches(*argv, "exact") == 0) {
1858 NEXT_ARG();
1859 }
1860 get_prefix(&filter.mdst, *argv, do_ipv6);
1861 filter.rdst = filter.mdst;
1862 }
1863 }
1864 argc--; argv++;
1865 }
1866
1867 if (do_ipv6 == AF_UNSPEC && filter.tb)
1868 do_ipv6 = AF_INET;
1869
aba5acdf
SH		 1870 if (id || od) {
1871 int idx;
1872
1873 if (id) {
cc560825 1874 idx = ll_name_to_index(id);
fe99adbc
SP		 1875 if (!idx)
1876 return nodev(id);
aba5acdf
SH		 1877 filter.iif = idx;
1878 filter.iifmask = -1;
1879 }
1880 if (od) {
cc560825 1881 idx = ll_name_to_index(od);
fe99adbc
SP		 1882 if (!idx)
1883 return nodev(od);
aba5acdf
SH		 1884 filter.oif = idx;
1885 filter.oifmask = -1;
1886 }
1887 }
b0373bfb 1888 filter.mark = mark;
aba5acdf 1889
432e5f97
SH		 1890 if (action == IPROUTE_FLUSH)
1891 return iproute_flush(do_ipv6, filter_fn);
aba5acdf 1892
bd4bcdad 1893 if (!filter.cloned) {
bfb27dfa 1894 if (rtnl_routedump_req(&rth, do_ipv6) < 0) {
aba5acdf 1895 perror("Cannot send dump request");
2f406f2d 1896 return -2;
aba5acdf
SH		 1897 }
1898 } else {
1899 if (rtnl_rtcache_request(&rth, do_ipv6) < 0) {
1900 perror("Cannot send dump request");
2f406f2d 1901 return -2;
aba5acdf
SH		 1902 }
1903 }
1904
663c3cb2
SH		 1905 new_json_obj(json);
1906
cd70f3f5 1907 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
aba5acdf 1908 fprintf(stderr, "Dump terminated\n");
2f406f2d 1909 return -2;
aba5acdf
SH		 1910 }
1911
663c3cb2
SH		 1912 delete_json_obj();
1913 fflush(stdout);
2f406f2d 1914 return 0;
aba5acdf
SH		 1915}
1916
1917
d1f28cf1 1918static int iproute_get(int argc, char **argv)
aba5acdf 1919{
aba5acdf 1920 struct {
4806867a
SH		 1921 struct nlmsghdr n;
1922 struct rtmsg r;
56f5daac 1923 char buf[1024];
d17b136f
PS		 1924 } req = {
1925 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1926 .n.nlmsg_flags = NLM_F_REQUEST,
1927 .n.nlmsg_type = RTM_GETROUTE,
1928 .r.rtm_family = preferred_family,
1929 };
aba5acdf
SH		 1930 char *idev = NULL;
1931 char *odev = NULL;
86bf43c7 1932 struct nlmsghdr *answer;
aba5acdf 1933 int connected = 0;
aa883d86 1934 int fib_match = 0;
aba5acdf 1935 int from_ok = 0;
b0373bfb 1936 unsigned int mark = 0;
aba5acdf 1937
093b7646 1938 iproute_reset_filter(0);
c73f3e02 1939 filter.cloned = 2;
aba5acdf 1940
aba5acdf
SH		 1941 while (argc > 0) {
1942 if (strcmp(*argv, "tos") == 0 ||
1943 matches(*argv, "dsfield") == 0) {
1944 __u32 tos;
56f5daac 1945
aba5acdf
SH		 1946 NEXT_ARG();
1947 if (rtnl_dsfield_a2n(&tos, *argv))
1948 invarg("TOS value is invalid\n", *argv);
1949 req.r.rtm_tos = tos;
1950 } else if (matches(*argv, "from") == 0) {
1951 inet_prefix addr;
56f5daac 1952
aba5acdf
SH		 1953 NEXT_ARG();
1954 if (matches(*argv, "help") == 0)
1955 usage();
1956 from_ok = 1;
1957 get_prefix(&addr, *argv, req.r.rtm_family);
1958 if (req.r.rtm_family == AF_UNSPEC)
1959 req.r.rtm_family = addr.family;
1960 if (addr.bytelen)
21fef525
SH		 1961 addattr_l(&req.n, sizeof(req), RTA_SRC,
1962 &addr.data, addr.bytelen);
aba5acdf
SH		 1963 req.r.rtm_src_len = addr.bitlen;
1964 } else if (matches(*argv, "iif") == 0) {
1965 NEXT_ARG();
1966 idev = *argv;
b0373bfb
ED		 1967 } else if (matches(*argv, "mark") == 0) {
1968 NEXT_ARG();
7c66d898
PS		 1969 if (get_unsigned(&mark, *argv, 0))
1970 invarg("invalid mark value", *argv);
aba5acdf
SH		 1971 } else if (matches(*argv, "oif") == 0 ||
1972 strcmp(*argv, "dev") == 0) {
1973 NEXT_ARG();
1974 odev = *argv;
1975 } else if (matches(*argv, "notify") == 0) {
1976 req.r.rtm_flags |= RTM_F_NOTIFY;
1977 } else if (matches(*argv, "connected") == 0) {
1978 connected = 1;
0130f012
DA		 1979 } else if (matches(*argv, "vrf") == 0) {
1980 NEXT_ARG();
1981 if (!name_is_vrf(*argv))
1982 invarg("Invalid VRF\n", *argv);
1983 odev = *argv;
82252cdc
LC		 1984 } else if (matches(*argv, "uid") == 0) {
1985 uid_t uid;
1986
1987 NEXT_ARG();
1988 if (get_unsigned(&uid, *argv, 0))
1989 invarg("invalid UID\n", *argv);
1990 addattr32(&req.n, sizeof(req), RTA_UID, uid);
aa883d86
RP		 1991 } else if (matches(*argv, "fibmatch") == 0) {
1992 fib_match = 1;
2e86ed54
RP		 1993 } else if (strcmp(*argv, "as") == 0) {
1994 inet_prefix addr;
1995
1996 NEXT_ARG();
1997 if (strcmp(*argv, "to") == 0)
1998 NEXT_ARG();
1999 get_addr(&addr, *argv, req.r.rtm_family);
2000 if (req.r.rtm_family == AF_UNSPEC)
2001 req.r.rtm_family = addr.family;
21fef525
SH		 2002 addattr_l(&req.n, sizeof(req), RTA_NEWDST,
2003 &addr.data, addr.bytelen);
804c7fff
RP		 2004 } else if (matches(*argv, "sport") == 0) {
2005 __be16 sport;
2006
2007 NEXT_ARG();
2008 if (get_be16(&sport, *argv, 0))
2009 invarg("invalid sport\n", *argv);
2010 addattr16(&req.n, sizeof(req), RTA_SPORT, sport);
2011 } else if (matches(*argv, "dport") == 0) {
2012 __be16 dport;
2013
2014 NEXT_ARG();
2015 if (get_be16(&dport, *argv, 0))
2016 invarg("invalid dport\n", *argv);
2017 addattr16(&req.n, sizeof(req), RTA_DPORT, dport);
2018 } else if (matches(*argv, "ipproto") == 0) {
2019 int ipproto;
2020
2021 NEXT_ARG();
2022 ipproto = inet_proto_a2n(*argv);
2023 if (ipproto < 0)
2024 invarg("Invalid \"ipproto\" value\n",
2025 *argv);
2026 addattr8(&req.n, sizeof(req), RTA_IP_PROTO, ipproto);
aba5acdf
SH		 2027 } else {
2028 inet_prefix addr;
56f5daac 2029
aba5acdf
SH		 2030 if (strcmp(*argv, "to") == 0) {
2031 NEXT_ARG();
2032 }
2033 if (matches(*argv, "help") == 0)
2034 usage();
2035 get_prefix(&addr, *argv, req.r.rtm_family);
2036 if (req.r.rtm_family == AF_UNSPEC)
2037 req.r.rtm_family = addr.family;
2038 if (addr.bytelen)
21fef525
SH		 2039 addattr_l(&req.n, sizeof(req),
2040 RTA_DST, &addr.data, addr.bytelen);
aba5acdf
SH		 2041 req.r.rtm_dst_len = addr.bitlen;
2042 }
2043 argc--; argv++;
2044 }
2045
2046 if (req.r.rtm_dst_len == 0) {
14645ec2 2047 fprintf(stderr, "need at least a destination address\n");
2f406f2d 2048 return -1;
aba5acdf
SH		 2049 }
2050
aba5acdf
SH		 2051 if (idev || odev) {
2052 int idx;
2053
2054 if (idev) {
cc560825 2055 idx = ll_name_to_index(idev);
fe99adbc
SP		 2056 if (!idx)
2057 return nodev(idev);
aba5acdf
SH		 2058 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
2059 }
2060 if (odev) {
cc560825 2061 idx = ll_name_to_index(odev);
fe99adbc
SP		 2062 if (!idx)
2063 return nodev(odev);
aba5acdf
SH		 2064 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
2065 }
2066 }
b0373bfb
ED		 2067 if (mark)
2068 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
aba5acdf
SH		 2069
2070 if (req.r.rtm_family == AF_UNSPEC)
2071 req.r.rtm_family = AF_INET;
2072
bc234301 2073 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
aa883d86
RP		 2074 if (fib_match)
2075 req.r.rtm_flags |= RTM_F_FIB_MATCH;
bc234301 2076
86bf43c7 2077 if (rtnl_talk(&rth, &req.n, &answer) < 0)
8b21cef1 2078 return -2;
aba5acdf
SH		 2079
2080 if (connected && !from_ok) {
86bf43c7
HL		 2081 struct rtmsg *r = NLMSG_DATA(answer);
2082 int len = answer->nlmsg_len;
56f5daac 2083 struct rtattr *tb[RTA_MAX+1];
aba5acdf 2084
86bf43c7 2085 if (print_route(NULL, answer, (void *)stdout) < 0) {
aba5acdf 2086 fprintf(stderr, "An error :-)\n");
86bf43c7 2087 free(answer);
8be29558 2088 return -1;
aba5acdf
SH		 2089 }
2090
86bf43c7 2091 if (answer->nlmsg_type != RTM_NEWROUTE) {
aba5acdf 2092 fprintf(stderr, "Not a route?\n");
86bf43c7 2093 free(answer);
aba5acdf
SH		 2094 return -1;
2095 }
2096 len -= NLMSG_LENGTH(sizeof(*r));
2097 if (len < 0) {
2098 fprintf(stderr, "Wrong len %d\n", len);
86bf43c7 2099 free(answer);
aba5acdf
SH		 2100 return -1;
2101 }
2102
aba5acdf
SH		 2103 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2104
2105 if (tb[RTA_PREFSRC]) {
2106 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
2107 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
2108 } else if (!tb[RTA_SRC]) {
2109 fprintf(stderr, "Failed to connect the route\n");
86bf43c7 2110 free(answer);
aba5acdf
SH		 2111 return -1;
2112 }
2113 if (!odev && tb[RTA_OIF])
2114 tb[RTA_OIF]->rta_type = 0;
2115 if (tb[RTA_GATEWAY])
2116 tb[RTA_GATEWAY]->rta_type = 0;
93ae2835
EB		 2117 if (tb[RTA_VIA])
2118 tb[RTA_VIA]->rta_type = 0;
aba5acdf
SH		 2119 if (!idev && tb[RTA_IIF])
2120 tb[RTA_IIF]->rta_type = 0;
2121 req.n.nlmsg_flags = NLM_F_REQUEST;
2122 req.n.nlmsg_type = RTM_GETROUTE;
2123
86bf43c7
HL		 2124 free(answer);
2125 if (rtnl_talk(&rth, &req.n, &answer) < 0)
56d8ff0a 2126 return -2;
aba5acdf
SH		 2127 }
2128
86bf43c7 2129 if (print_route(NULL, answer, (void *)stdout) < 0) {
aba5acdf 2130 fprintf(stderr, "An error :-)\n");
86bf43c7 2131 free(answer);
56d8ff0a 2132 return -1;
aba5acdf
SH		 2133 }
2134
86bf43c7 2135 free(answer);
56d8ff0a 2136 return 0;
aba5acdf
SH		 2137}
2138
79f4a393 2139static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
74af8dd9
XL		 2140{
2141 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
2142 return 1;
2143
2144 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
2145}
2146
0628cddd
ND		 2147static int restore_handler(const struct sockaddr_nl *nl,
2148 struct rtnl_ctrl_data *ctrl,
2149 struct nlmsghdr *n, void *arg)
f4ff11e3 2150{
74af8dd9
XL		 2151 struct rtmsg *r = NLMSG_DATA(n);
2152 struct rtattr *tb[RTA_MAX+1];
2153 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
2154 int ret, prio = *(int *)arg;
2155
2156 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
f4ff11e3 2157
74af8dd9
XL		 2158 /* Restore routes in correct order:
2159 * 0. ones for local addresses,
2160 * 1. ones for local networks,
2161 * 2. others (remote networks/hosts).
2162 */
2163 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
2164 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
2165 goto restore;
c85703bb 2166 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
74af8dd9
XL		 2167 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
2168 goto restore;
2169 else if (prio == 2 && tb[RTA_GATEWAY])
2170 goto restore;
2171
2172 return 0;
2173
2174restore:
f4ff11e3
DS		 2175 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
2176
2177 ll_init_map(&rth);
2178
86bf43c7 2179 ret = rtnl_talk(&rth, n, NULL);
f4ff11e3
DS		 2180 if ((ret < 0) && (errno == EEXIST))
2181 ret = 0;
2182
2183 return ret;
2184}
2185
76c61b34
PE		 2186static int route_dump_check_magic(void)
2187{
2188 int ret;
2189 __u32 magic = 0;
2190
2191 if (isatty(STDIN_FILENO)) {
2192 fprintf(stderr, "Can't restore route dump from a terminal\n");
2193 return -1;
2194 }
2195
2196 ret = fread(&magic, sizeof(magic), 1, stdin);
2197 if (magic != route_dump_magic) {
2198 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
2199 return -1;
2200 }
2201
2202 return 0;
2203}
2204
d1f28cf1 2205static int iproute_restore(void)
f4ff11e3 2206{
74af8dd9
XL		 2207 int pos, prio;
2208
76c61b34 2209 if (route_dump_check_magic())
2f406f2d 2210 return -1;
76c61b34 2211
74af8dd9 2212 pos = ftell(stdin);
bffb68b6
HL		 2213 if (pos == -1) {
2214 perror("Failed to restore: ftell");
2f406f2d 2215 return -1;
bffb68b6
HL		 2216 }
2217
74af8dd9
XL		 2218 for (prio = 0; prio < 3; prio++) {
2219 int err;
2220
2221 err = rtnl_from_file(stdin, &restore_handler, &prio);
2222 if (err)
2f406f2d 2223 return -2;
74af8dd9 2224
bffb68b6
HL		 2225 if (fseek(stdin, pos, SEEK_SET) == -1) {
2226 perror("Failed to restore: fseek");
2f406f2d 2227 return -1;
bffb68b6 2228 }
74af8dd9
XL		 2229 }
2230
2f406f2d 2231 return 0;
f4ff11e3
DS		 2232}
2233
0628cddd
ND		 2234static int show_handler(const struct sockaddr_nl *nl,
2235 struct rtnl_ctrl_data *ctrl,
2236 struct nlmsghdr *n, void *arg)
93b79863
PE		 2237{
2238 print_route(nl, n, stdout);
2239 return 0;
2240}
2241
2242static int iproute_showdump(void)
2243{
2244 if (route_dump_check_magic())
2f406f2d 2245 return -1;
93b79863 2246
2f406f2d
ÉB		 2247 if (rtnl_from_file(stdin, &show_handler, NULL))
2248 return -2;
2249
2250 return 0;
93b79863
PE		 2251}
2252
093b7646 2253void iproute_reset_filter(int ifindex)
aba5acdf
SH		 2254{
2255 memset(&filter, 0, sizeof(filter));
2256 filter.mdst.bitlen = -1;
2257 filter.msrc.bitlen = -1;
093b7646 2258 filter.oif = ifindex;
2259 if (filter.oif > 0)
2260 filter.oifmask = -1;
aba5acdf
SH		 2261}
2262
2263int do_iproute(int argc, char **argv)
2264{
2265 if (argc < 1)
f4ff11e3 2266 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
ae665a52 2267
aba5acdf
SH		 2268 if (matches(*argv, "add") == 0)
2269 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
2270 argc-1, argv+1);
2271 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
2272 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
2273 argc-1, argv+1);
2274 if (matches(*argv, "replace") == 0)
2275 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
2276 argc-1, argv+1);
2277 if (matches(*argv, "prepend") == 0)
2278 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
2279 argc-1, argv+1);
2280 if (matches(*argv, "append") == 0)
2281 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
2282 argc-1, argv+1);
2283 if (matches(*argv, "test") == 0)
2284 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
2285 argc-1, argv+1);
2286 if (matches(*argv, "delete") == 0)
2287 return iproute_modify(RTM_DELROUTE, 0,
2288 argc-1, argv+1);
2289 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2290 || matches(*argv, "lst") == 0)
f4ff11e3 2291 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
aba5acdf
SH		 2292 if (matches(*argv, "get") == 0)
2293 return iproute_get(argc-1, argv+1);
2294 if (matches(*argv, "flush") == 0)
f4ff11e3
DS		 2295 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2296 if (matches(*argv, "save") == 0)
2297 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2298 if (matches(*argv, "restore") == 0)
2299 return iproute_restore();
93b79863
PE		 2300 if (matches(*argv, "showdump") == 0)
2301 return iproute_showdump();
aba5acdf
SH		 2302 if (matches(*argv, "help") == 0)
2303 usage();
80d1c528
SH		 2304
2305 fprintf(stderr,
2306 "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
aba5acdf
SH		 2307 exit(-1);
2308}
Upstream mirror of iproute2