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1 /*
2 * iproute.c "ip route".
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 *
11 */
12
13 #include <stdio.h>
14 #include <stdlib.h>
15 #include <unistd.h>
16 #include <fcntl.h>
17 #include <string.h>
18 #include <time.h>
19 #include <sys/time.h>
20 #include <sys/socket.h>
21 #include <netinet/in.h>
22 #include <netinet/ip.h>
23 #include <arpa/inet.h>
24 #include <linux/in_route.h>
25 #include <linux/icmpv6.h>
26 #include <errno.h>
27
28 #include "rt_names.h"
29 #include "utils.h"
30 #include "ip_common.h"
31
32 #ifndef RTAX_RTTVAR
33 #define RTAX_RTTVAR RTAX_HOPS
34 #endif
35
36 enum list_action {
37 IPROUTE_LIST,
38 IPROUTE_FLUSH,
39 IPROUTE_SAVE,
40 };
41 static const char *mx_names[RTAX_MAX+1] = {
42 [RTAX_MTU] = "mtu",
43 [RTAX_WINDOW] = "window",
44 [RTAX_RTT] = "rtt",
45 [RTAX_RTTVAR] = "rttvar",
46 [RTAX_SSTHRESH] = "ssthresh",
47 [RTAX_CWND] = "cwnd",
48 [RTAX_ADVMSS] = "advmss",
49 [RTAX_REORDERING] = "reordering",
50 [RTAX_HOPLIMIT] = "hoplimit",
51 [RTAX_INITCWND] = "initcwnd",
52 [RTAX_FEATURES] = "features",
53 [RTAX_RTO_MIN] = "rto_min",
54 [RTAX_INITRWND] = "initrwnd",
55 [RTAX_QUICKACK] = "quickack",
56 [RTAX_CC_ALGO] = "congctl",
57 [RTAX_FASTOPEN_NO_COOKIE] = "fastopen_no_cookie"
58 };
59 static void usage(void) __attribute__((noreturn));
60
61 static void usage(void)
62 {
63 fprintf(stderr,
64 "Usage: ip route { list | flush } SELECTOR\n"
65 " ip route save SELECTOR\n"
66 " ip route restore\n"
67 " ip route showdump\n"
68 " ip route get [ ROUTE_GET_FLAGS ] ADDRESS\n"
69 " [ from ADDRESS iif STRING ]\n"
70 " [ oif STRING ] [ tos TOS ]\n"
71 " [ mark NUMBER ] [ vrf NAME ]\n"
72 " [ uid NUMBER ] [ ipproto PROTOCOL ]\n"
73 " [ sport NUMBER ] [ dport NUMBER ]\n"
74 " ip route { add | del | change | append | replace } ROUTE\n"
75 "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n"
76 " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n"
77 " [ type TYPE ] [ scope SCOPE ]\n"
78 "ROUTE := NODE_SPEC [ INFO_SPEC ]\n"
79 "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n"
80 " [ table TABLE_ID ] [ proto RTPROTO ]\n"
81 " [ scope SCOPE ] [ metric METRIC ]\n"
82 " [ ttl-propagate { enabled | disabled } ]\n"
83 "INFO_SPEC := { NH | nhid ID } OPTIONS FLAGS [ nexthop NH ]...\n"
84 "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n"
85 " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n"
86 "FAMILY := [ inet | inet6 | mpls | bridge | link ]\n"
87 "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n"
88 " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n"
89 " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"
90 " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"
91 " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n"
92 " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n"
93 " [ pref PREF ] [ expires TIME ] [ fastopen_no_cookie BOOL ]\n"
94 "TYPE := { unicast | local | broadcast | multicast | throw |\n"
95 " unreachable | prohibit | blackhole | nat }\n"
96 "TABLE_ID := [ local | main | default | all | NUMBER ]\n"
97 "SCOPE := [ host | link | global | NUMBER ]\n"
98 "NHFLAGS := [ onlink | pervasive ]\n"
99 "RTPROTO := [ kernel | boot | static | NUMBER ]\n"
100 "PREF := [ low | medium | high ]\n"
101 "TIME := NUMBER[s|ms]\n"
102 "BOOL := [1|0]\n"
103 "FEATURES := ecn\n"
104 "ENCAPTYPE := [ mpls | ip | ip6 | seg6 | seg6local ]\n"
105 "ENCAPHDR := [ MPLSLABEL | SEG6HDR ]\n"
106 "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n"
107 "SEGMODE := [ encap | inline ]\n"
108 "ROUTE_GET_FLAGS := [ fibmatch ]\n");
109 exit(-1);
110 }
111
112
113 static struct
114 {
115 unsigned int tb;
116 int cloned;
117 int flushed;
118 char *flushb;
119 int flushp;
120 int flushe;
121 int protocol, protocolmask;
122 int scope, scopemask;
123 __u64 typemask;
124 int tos, tosmask;
125 int iif, iifmask;
126 int oif, oifmask;
127 int mark, markmask;
128 int realm, realmmask;
129 __u32 metric, metricmask;
130 inet_prefix rprefsrc;
131 inet_prefix rvia;
132 inet_prefix rdst;
133 inet_prefix mdst;
134 inet_prefix rsrc;
135 inet_prefix msrc;
136 } filter;
137
138 static int flush_update(void)
139 {
140 if (rtnl_send_check(&rth, filter.flushb, filter.flushp) < 0) {
141 perror("Failed to send flush request");
142 return -2;
143 }
144 filter.flushp = 0;
145 return 0;
146 }
147
148 static int filter_nlmsg(struct nlmsghdr *n, struct rtattr **tb, int host_len)
149 {
150 struct rtmsg *r = NLMSG_DATA(n);
151 inet_prefix dst = { .family = r->rtm_family };
152 inet_prefix src = { .family = r->rtm_family };
153 inet_prefix via = { .family = r->rtm_family };
154 inet_prefix prefsrc = { .family = r->rtm_family };
155 __u32 table;
156 static int ip6_multiple_tables;
157
158 table = rtm_get_table(r, tb);
159
160 if (preferred_family != AF_UNSPEC && r->rtm_family != preferred_family)
161 return 0;
162
163 if (r->rtm_family == AF_INET6 && table != RT_TABLE_MAIN)
164 ip6_multiple_tables = 1;
165
166 if (filter.cloned == !(r->rtm_flags & RTM_F_CLONED))
167 return 0;
168
169 if (r->rtm_family == AF_INET6 && !ip6_multiple_tables) {
170 if (filter.tb) {
171 if (filter.tb == RT_TABLE_LOCAL) {
172 if (r->rtm_type != RTN_LOCAL)
173 return 0;
174 } else if (filter.tb == RT_TABLE_MAIN) {
175 if (r->rtm_type == RTN_LOCAL)
176 return 0;
177 } else {
178 return 0;
179 }
180 }
181 } else {
182 if (filter.tb > 0 && filter.tb != table)
183 return 0;
184 }
185 if ((filter.protocol^r->rtm_protocol)&filter.protocolmask)
186 return 0;
187 if ((filter.scope^r->rtm_scope)&filter.scopemask)
188 return 0;
189
190 if (filter.typemask && !(filter.typemask & (1 << r->rtm_type)))
191 return 0;
192 if ((filter.tos^r->rtm_tos)&filter.tosmask)
193 return 0;
194 if (filter.rdst.family) {
195 if (r->rtm_family != filter.rdst.family ||
196 filter.rdst.bitlen > r->rtm_dst_len)
197 return 0;
198 } else if (filter.rdst.flags & PREFIXLEN_SPECIFIED) {
199 if (filter.rdst.bitlen > r->rtm_dst_len)
200 return 0;
201 }
202 if (filter.mdst.family) {
203 if (r->rtm_family != filter.mdst.family ||
204 (filter.mdst.bitlen >= 0 &&
205 filter.mdst.bitlen < r->rtm_dst_len))
206 return 0;
207 } else if (filter.mdst.flags & PREFIXLEN_SPECIFIED) {
208 if (filter.mdst.bitlen >= 0 &&
209 filter.mdst.bitlen < r->rtm_dst_len)
210 return 0;
211 }
212 if (filter.rsrc.family) {
213 if (r->rtm_family != filter.rsrc.family ||
214 filter.rsrc.bitlen > r->rtm_src_len)
215 return 0;
216 } else if (filter.rsrc.flags & PREFIXLEN_SPECIFIED) {
217 if (filter.rsrc.bitlen > r->rtm_src_len)
218 return 0;
219 }
220 if (filter.msrc.family) {
221 if (r->rtm_family != filter.msrc.family ||
222 (filter.msrc.bitlen >= 0 &&
223 filter.msrc.bitlen < r->rtm_src_len))
224 return 0;
225 } else if (filter.msrc.flags & PREFIXLEN_SPECIFIED) {
226 if (filter.msrc.bitlen >= 0 &&
227 filter.msrc.bitlen < r->rtm_src_len)
228 return 0;
229 }
230 if (filter.rvia.family) {
231 int family = r->rtm_family;
232
233 if (tb[RTA_VIA]) {
234 struct rtvia *via = RTA_DATA(tb[RTA_VIA]);
235
236 family = via->rtvia_family;
237 }
238 if (family != filter.rvia.family)
239 return 0;
240 }
241 if (filter.rprefsrc.family && r->rtm_family != filter.rprefsrc.family)
242 return 0;
243
244 if (tb[RTA_DST])
245 memcpy(&dst.data, RTA_DATA(tb[RTA_DST]), (r->rtm_dst_len+7)/8);
246 if (filter.rsrc.family || filter.msrc.family ||
247 filter.rsrc.flags & PREFIXLEN_SPECIFIED ||
248 filter.msrc.flags & PREFIXLEN_SPECIFIED) {
249 if (tb[RTA_SRC])
250 memcpy(&src.data, RTA_DATA(tb[RTA_SRC]), (r->rtm_src_len+7)/8);
251 }
252 if (filter.rvia.bitlen > 0) {
253 if (tb[RTA_GATEWAY])
254 memcpy(&via.data, RTA_DATA(tb[RTA_GATEWAY]), host_len/8);
255 if (tb[RTA_VIA]) {
256 size_t len = RTA_PAYLOAD(tb[RTA_VIA]) - 2;
257 struct rtvia *rtvia = RTA_DATA(tb[RTA_VIA]);
258
259 via.family = rtvia->rtvia_family;
260 memcpy(&via.data, rtvia->rtvia_addr, len);
261 }
262 }
263 if (filter.rprefsrc.bitlen > 0) {
264 if (tb[RTA_PREFSRC])
265 memcpy(&prefsrc.data, RTA_DATA(tb[RTA_PREFSRC]), host_len/8);
266 }
267
268 if ((filter.rdst.family || filter.rdst.flags & PREFIXLEN_SPECIFIED) &&
269 inet_addr_match(&dst, &filter.rdst, filter.rdst.bitlen))
270 return 0;
271 if ((filter.mdst.family || filter.mdst.flags & PREFIXLEN_SPECIFIED) &&
272 inet_addr_match(&dst, &filter.mdst, r->rtm_dst_len))
273 return 0;
274
275 if ((filter.rsrc.family || filter.rsrc.flags & PREFIXLEN_SPECIFIED) &&
276 inet_addr_match(&src, &filter.rsrc, filter.rsrc.bitlen))
277 return 0;
278 if ((filter.msrc.family || filter.msrc.flags & PREFIXLEN_SPECIFIED) &&
279 filter.msrc.bitlen >= 0 &&
280 inet_addr_match(&src, &filter.msrc, r->rtm_src_len))
281 return 0;
282
283 if (filter.rvia.family && inet_addr_match(&via, &filter.rvia, filter.rvia.bitlen))
284 return 0;
285 if (filter.rprefsrc.family && inet_addr_match(&prefsrc, &filter.rprefsrc, filter.rprefsrc.bitlen))
286 return 0;
287 if (filter.realmmask) {
288 __u32 realms = 0;
289
290 if (tb[RTA_FLOW])
291 realms = rta_getattr_u32(tb[RTA_FLOW]);
292 if ((realms^filter.realm)&filter.realmmask)
293 return 0;
294 }
295 if (filter.iifmask) {
296 int iif = 0;
297
298 if (tb[RTA_IIF])
299 iif = rta_getattr_u32(tb[RTA_IIF]);
300 if ((iif^filter.iif)&filter.iifmask)
301 return 0;
302 }
303 if (filter.oifmask) {
304 int oif = 0;
305
306 if (tb[RTA_OIF])
307 oif = rta_getattr_u32(tb[RTA_OIF]);
308 if ((oif^filter.oif)&filter.oifmask)
309 return 0;
310 }
311 if (filter.markmask) {
312 int mark = 0;
313
314 if (tb[RTA_MARK])
315 mark = rta_getattr_u32(tb[RTA_MARK]);
316 if ((mark ^ filter.mark) & filter.markmask)
317 return 0;
318 }
319 if (filter.metricmask) {
320 __u32 metric = 0;
321
322 if (tb[RTA_PRIORITY])
323 metric = rta_getattr_u32(tb[RTA_PRIORITY]);
324 if ((metric ^ filter.metric) & filter.metricmask)
325 return 0;
326 }
327 if (filter.flushb &&
328 r->rtm_family == AF_INET6 &&
329 r->rtm_dst_len == 0 &&
330 r->rtm_type == RTN_UNREACHABLE &&
331 tb[RTA_PRIORITY] &&
332 rta_getattr_u32(tb[RTA_PRIORITY]) == -1)
333 return 0;
334
335 return 1;
336 }
337
338 static void print_rtax_features(FILE *fp, unsigned int features)
339 {
340 unsigned int of = features;
341
342 if (features & RTAX_FEATURE_ECN) {
343 print_null(PRINT_ANY, "ecn", "ecn ", NULL);
344 features &= ~RTAX_FEATURE_ECN;
345 }
346
347 if (features)
348 print_0xhex(PRINT_ANY,
349 "features", "%#llx ", of);
350 }
351
352 void print_rt_flags(FILE *fp, unsigned int flags)
353 {
354 open_json_array(PRINT_JSON,
355 is_json_context() ? "flags" : "");
356
357 if (flags & RTNH_F_DEAD)
358 print_string(PRINT_ANY, NULL, "%s ", "dead");
359 if (flags & RTNH_F_ONLINK)
360 print_string(PRINT_ANY, NULL, "%s ", "onlink");
361 if (flags & RTNH_F_PERVASIVE)
362 print_string(PRINT_ANY, NULL, "%s ", "pervasive");
363 if (flags & RTNH_F_OFFLOAD)
364 print_string(PRINT_ANY, NULL, "%s ", "offload");
365 if (flags & RTM_F_NOTIFY)
366 print_string(PRINT_ANY, NULL, "%s ", "notify");
367 if (flags & RTNH_F_LINKDOWN)
368 print_string(PRINT_ANY, NULL, "%s ", "linkdown");
369 if (flags & RTNH_F_UNRESOLVED)
370 print_string(PRINT_ANY, NULL, "%s ", "unresolved");
371
372 close_json_array(PRINT_JSON, NULL);
373 }
374
375 static void print_rt_pref(FILE *fp, unsigned int pref)
376 {
377
378 switch (pref) {
379 case ICMPV6_ROUTER_PREF_LOW:
380 print_string(PRINT_ANY,
381 "pref", "pref %s", "low");
382 break;
383 case ICMPV6_ROUTER_PREF_MEDIUM:
384 print_string(PRINT_ANY,
385 "pref", "pref %s", "medium");
386 break;
387 case ICMPV6_ROUTER_PREF_HIGH:
388 print_string(PRINT_ANY,
389 "pref", "pref %s", "high");
390 break;
391 default:
392 print_uint(PRINT_ANY,
393 "pref", "%u", pref);
394 }
395 }
396
397 void print_rta_if(FILE *fp, const struct rtattr *rta, const char *prefix)
398 {
399 const char *ifname = ll_index_to_name(rta_getattr_u32(rta));
400
401 if (is_json_context())
402 print_string(PRINT_JSON, prefix, NULL, ifname);
403 else {
404 fprintf(fp, "%s ", prefix);
405 color_fprintf(fp, COLOR_IFNAME, "%s ", ifname);
406 }
407 }
408
409 static void print_cache_flags(FILE *fp, __u32 flags)
410 {
411 json_writer_t *jw = get_json_writer();
412 flags &= ~0xFFFF;
413
414 if (jw) {
415 jsonw_name(jw, "cache");
416 jsonw_start_array(jw);
417 } else {
418 fprintf(fp, "%s cache ", _SL_);
419 if (flags == 0)
420 return;
421 putc('<', fp);
422 }
423
424 #define PRTFL(fl, flname) \
425 if (flags & RTCF_##fl) { \
426 flags &= ~RTCF_##fl; \
427 if (jw) \
428 jsonw_string(jw, flname); \
429 else \
430 fprintf(fp, "%s%s", flname, flags ? "," : "> "); \
431 }
432
433 PRTFL(LOCAL, "local");
434 PRTFL(REJECT, "reject");
435 PRTFL(MULTICAST, "mc");
436 PRTFL(BROADCAST, "brd");
437 PRTFL(DNAT, "dst-nat");
438 PRTFL(SNAT, "src-nat");
439 PRTFL(MASQ, "masq");
440 PRTFL(DIRECTDST, "dst-direct");
441 PRTFL(DIRECTSRC, "src-direct");
442 PRTFL(REDIRECTED, "redirected");
443 PRTFL(DOREDIRECT, "redirect");
444 PRTFL(FAST, "fastroute");
445 PRTFL(NOTIFY, "notify");
446 PRTFL(TPROXY, "proxy");
447 #undef PRTFL
448
449 if (flags)
450 print_hex(PRINT_ANY, "flags", "%x>", flags);
451
452 if (jw)
453 jsonw_end_array(jw);
454 }
455
456 static void print_rta_cacheinfo(FILE *fp, const struct rta_cacheinfo *ci)
457 {
458 static int hz;
459
460 if (!hz)
461 hz = get_user_hz();
462
463 if (ci->rta_expires != 0)
464 print_int(PRINT_ANY, "expires",
465 "expires %dsec ", ci->rta_expires/hz);
466 if (ci->rta_error != 0)
467 print_uint(PRINT_ANY, "error",
468 "error %u ", ci->rta_error);
469
470 if (show_stats) {
471 if (ci->rta_clntref)
472 print_uint(PRINT_ANY, "users",
473 "users %u ", ci->rta_clntref);
474 if (ci->rta_used != 0)
475 print_uint(PRINT_ANY, "used",
476 "used %u ", ci->rta_used);
477 if (ci->rta_lastuse != 0)
478 print_uint(PRINT_ANY, "age",
479 "age %usec ", ci->rta_lastuse/hz);
480 }
481 if (ci->rta_id)
482 print_0xhex(PRINT_ANY, "ipid",
483 "ipid 0x%04llx ", ci->rta_id);
484 if (ci->rta_ts || ci->rta_tsage) {
485 print_0xhex(PRINT_ANY, "ts",
486 "ts 0x%llx", ci->rta_ts);
487 print_uint(PRINT_ANY, "tsage",
488 "tsage %usec ", ci->rta_tsage);
489 }
490 }
491
492 static void print_rta_flow(FILE *fp, const struct rtattr *rta)
493 {
494 __u32 to = rta_getattr_u32(rta);
495 __u32 from = to >> 16;
496 SPRINT_BUF(b1);
497
498 to &= 0xFFFF;
499 if (is_json_context()) {
500 open_json_object("flow");
501
502 if (from)
503 print_string(PRINT_JSON, "from", NULL,
504 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
505 print_string(PRINT_JSON, "to", NULL,
506 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
507 close_json_object();
508 } else {
509 fprintf(fp, "realm%s ", from ? "s" : "");
510
511 if (from)
512 print_string(PRINT_FP, NULL, "%s/",
513 rtnl_rtrealm_n2a(from, b1, sizeof(b1)));
514 print_string(PRINT_FP, NULL, "%s ",
515 rtnl_rtrealm_n2a(to, b1, sizeof(b1)));
516 }
517 }
518
519 static void print_rta_newdst(FILE *fp, const struct rtmsg *r,
520 const struct rtattr *rta)
521 {
522 const char *newdst = format_host_rta(r->rtm_family, rta);
523
524 if (is_json_context())
525 print_string(PRINT_JSON, "to", NULL, newdst);
526 else {
527 fprintf(fp, "as to ");
528 print_color_string(PRINT_FP,
529 ifa_family_color(r->rtm_family),
530 NULL, "%s ", newdst);
531 }
532 }
533
534 void print_rta_gateway(FILE *fp, unsigned char family, const struct rtattr *rta)
535 {
536 const char *gateway = format_host_rta(family, rta);
537
538 if (is_json_context())
539 print_string(PRINT_JSON, "gateway", NULL, gateway);
540 else {
541 fprintf(fp, "via ");
542 print_color_string(PRINT_FP,
543 ifa_family_color(family),
544 NULL, "%s ", gateway);
545 }
546 }
547
548 static void print_rta_via(FILE *fp, const struct rtattr *rta)
549 {
550 size_t len = RTA_PAYLOAD(rta) - 2;
551 const struct rtvia *via = RTA_DATA(rta);
552
553 if (is_json_context()) {
554 open_json_object("via");
555 print_string(PRINT_JSON, "family", NULL,
556 family_name(via->rtvia_family));
557 print_string(PRINT_JSON, "host", NULL,
558 format_host(via->rtvia_family, len,
559 via->rtvia_addr));
560 close_json_object();
561 } else {
562 print_string(PRINT_FP, NULL, "via %s ",
563 family_name(via->rtvia_family));
564 print_color_string(PRINT_FP,
565 ifa_family_color(via->rtvia_family),
566 NULL, "%s ",
567 format_host(via->rtvia_family,
568 len, via->rtvia_addr));
569 }
570 }
571
572 static void print_rta_metrics(FILE *fp, const struct rtattr *rta)
573 {
574 struct rtattr *mxrta[RTAX_MAX+1];
575 unsigned int mxlock = 0;
576 int i;
577
578 open_json_array(PRINT_JSON, "metrics");
579 open_json_object(NULL);
580
581 parse_rtattr(mxrta, RTAX_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta));
582
583 if (mxrta[RTAX_LOCK])
584 mxlock = rta_getattr_u32(mxrta[RTAX_LOCK]);
585
586 for (i = 2; i <= RTAX_MAX; i++) {
587 __u32 val = 0U;
588
589 if (mxrta[i] == NULL && !(mxlock & (1 << i)))
590 continue;
591
592 if (mxrta[i] != NULL && i != RTAX_CC_ALGO)
593 val = rta_getattr_u32(mxrta[i]);
594
595 if (i == RTAX_HOPLIMIT && (int)val == -1)
596 continue;
597
598 if (!is_json_context()) {
599 if (i < sizeof(mx_names)/sizeof(char *) && mx_names[i])
600 fprintf(fp, "%s ", mx_names[i]);
601 else
602 fprintf(fp, "metric %d ", i);
603
604 if (mxlock & (1<<i))
605 fprintf(fp, "lock ");
606 }
607
608 switch (i) {
609 case RTAX_FEATURES:
610 print_rtax_features(fp, val);
611 break;
612 default:
613 print_uint(PRINT_ANY, mx_names[i], "%u ", val);
614 break;
615
616 case RTAX_RTT:
617 case RTAX_RTTVAR:
618 case RTAX_RTO_MIN:
619 if (i == RTAX_RTT)
620 val /= 8;
621 else if (i == RTAX_RTTVAR)
622 val /= 4;
623
624 if (is_json_context())
625 print_uint(PRINT_JSON, mx_names[i],
626 NULL, val);
627 else {
628 if (val >= 1000)
629 fprintf(fp, "%gs ", val/1e3);
630 else
631 fprintf(fp, "%ums ", val);
632 }
633 break;
634 case RTAX_CC_ALGO:
635 print_string(PRINT_ANY, "congestion",
636 "%s ", rta_getattr_str(mxrta[i]));
637 break;
638 }
639 }
640
641 close_json_object();
642 close_json_array(PRINT_JSON, NULL);
643 }
644
645 static void print_rta_multipath(FILE *fp, const struct rtmsg *r,
646 struct rtattr *rta)
647 {
648 const struct rtnexthop *nh = RTA_DATA(rta);
649 int len = RTA_PAYLOAD(rta);
650 int first = 1;
651
652 open_json_array(PRINT_JSON, "nexthops");
653
654 while (len >= sizeof(*nh)) {
655 struct rtattr *tb[RTA_MAX + 1];
656
657 if (nh->rtnh_len > len)
658 break;
659
660 open_json_object(NULL);
661
662 if ((r->rtm_flags & RTM_F_CLONED) &&
663 r->rtm_type == RTN_MULTICAST) {
664 if (first) {
665 print_string(PRINT_FP, NULL, "Oifs: ", NULL);
666 first = 0;
667 } else {
668 print_string(PRINT_FP, NULL, " ", NULL);
669 }
670 } else
671 print_string(PRINT_FP, NULL, "%s\tnexthop ", _SL_);
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->rtm_family,
685 tb[RTA_GATEWAY]);
686 if (tb[RTA_VIA])
687 print_rta_via(fp, tb[RTA_VIA]);
688 if (tb[RTA_FLOW])
689 print_rta_flow(fp, tb[RTA_FLOW]);
690 }
691
692 if ((r->rtm_flags & RTM_F_CLONED) &&
693 r->rtm_type == RTN_MULTICAST) {
694 print_string(PRINT_ANY, "dev",
695 "%s", ll_index_to_name(nh->rtnh_ifindex));
696
697 if (nh->rtnh_hops != 1)
698 print_int(PRINT_ANY, "ttl", "(ttl>%d)", nh->rtnh_hops);
699
700 print_string(PRINT_FP, NULL, " ", NULL);
701 } else {
702 print_string(PRINT_ANY, "dev",
703 "dev %s ", ll_index_to_name(nh->rtnh_ifindex));
704
705 if (r->rtm_family != AF_MPLS)
706 print_int(PRINT_ANY, "weight",
707 "weight %d ", nh->rtnh_hops + 1);
708 }
709
710 print_rt_flags(fp, nh->rtnh_flags);
711
712 len -= NLMSG_ALIGN(nh->rtnh_len);
713 nh = RTNH_NEXT(nh);
714
715 close_json_object();
716 }
717 close_json_array(PRINT_JSON, NULL);
718 }
719
720 int print_route(struct nlmsghdr *n, void *arg)
721 {
722 FILE *fp = (FILE *)arg;
723 struct rtmsg *r = NLMSG_DATA(n);
724 int len = n->nlmsg_len;
725 struct rtattr *tb[RTA_MAX+1];
726 int family, color, host_len;
727 __u32 table;
728 int ret;
729
730 SPRINT_BUF(b1);
731
732 if (n->nlmsg_type != RTM_NEWROUTE && n->nlmsg_type != RTM_DELROUTE) {
733 fprintf(stderr, "Not a route: %08x %08x %08x\n",
734 n->nlmsg_len, n->nlmsg_type, n->nlmsg_flags);
735 return -1;
736 }
737 if (filter.flushb && n->nlmsg_type != RTM_NEWROUTE)
738 return 0;
739 len -= NLMSG_LENGTH(sizeof(*r));
740 if (len < 0) {
741 fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
742 return -1;
743 }
744
745 host_len = af_bit_len(r->rtm_family);
746
747 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
748 table = rtm_get_table(r, tb);
749
750 if (!filter_nlmsg(n, tb, host_len))
751 return 0;
752
753 if (filter.flushb) {
754 struct nlmsghdr *fn;
755
756 if (NLMSG_ALIGN(filter.flushp) + n->nlmsg_len > filter.flushe) {
757 ret = flush_update();
758 if (ret < 0)
759 return ret;
760 }
761 fn = (struct nlmsghdr *)(filter.flushb + NLMSG_ALIGN(filter.flushp));
762 memcpy(fn, n, n->nlmsg_len);
763 fn->nlmsg_type = RTM_DELROUTE;
764 fn->nlmsg_flags = NLM_F_REQUEST;
765 fn->nlmsg_seq = ++rth.seq;
766 filter.flushp = (((char *)fn) + n->nlmsg_len) - filter.flushb;
767 filter.flushed++;
768 if (show_stats < 2)
769 return 0;
770 }
771
772 open_json_object(NULL);
773 if (n->nlmsg_type == RTM_DELROUTE)
774 print_bool(PRINT_ANY, "deleted", "Deleted ", true);
775
776 if ((r->rtm_type != RTN_UNICAST || show_details > 0) &&
777 (!filter.typemask || (filter.typemask & (1 << r->rtm_type))))
778 print_string(PRINT_ANY, "type", "%s ",
779 rtnl_rtntype_n2a(r->rtm_type, b1, sizeof(b1)));
780
781 color = COLOR_NONE;
782 if (tb[RTA_DST]) {
783 family = get_real_family(r->rtm_type, r->rtm_family);
784 color = ifa_family_color(family);
785
786 if (r->rtm_dst_len != host_len) {
787 snprintf(b1, sizeof(b1),
788 "%s/%u", rt_addr_n2a_rta(family, tb[RTA_DST]),
789 r->rtm_dst_len);
790 } else {
791 format_host_rta_r(family, tb[RTA_DST],
792 b1, sizeof(b1));
793
794 }
795 } else if (r->rtm_dst_len) {
796 snprintf(b1, sizeof(b1), "0/%d ", r->rtm_dst_len);
797 } else {
798 strncpy(b1, "default", sizeof(b1));
799 }
800 print_color_string(PRINT_ANY, color,
801 "dst", "%s ", b1);
802
803 if (tb[RTA_SRC]) {
804 family = get_real_family(r->rtm_type, r->rtm_family);
805 color = ifa_family_color(family);
806
807 if (r->rtm_src_len != host_len) {
808 snprintf(b1, sizeof(b1),
809 "%s/%u",
810 rt_addr_n2a_rta(family, tb[RTA_SRC]),
811 r->rtm_src_len);
812 } else {
813 format_host_rta_r(family, tb[RTA_SRC],
814 b1, sizeof(b1));
815 }
816 print_color_string(PRINT_ANY, color,
817 "from", "from %s ", b1);
818 } else if (r->rtm_src_len) {
819 snprintf(b1, sizeof(b1), "0/%u", r->rtm_src_len);
820
821 print_string(PRINT_ANY, "src", "from %s ", b1);
822 }
823
824 if (tb[RTA_NH_ID])
825 print_uint(PRINT_ANY, "nhid", "nhid %u ",
826 rta_getattr_u32(tb[RTA_NH_ID]));
827
828 if (tb[RTA_NEWDST])
829 print_rta_newdst(fp, r, tb[RTA_NEWDST]);
830
831 if (tb[RTA_ENCAP])
832 lwt_print_encap(fp, tb[RTA_ENCAP_TYPE], tb[RTA_ENCAP]);
833
834 if (r->rtm_tos && filter.tosmask != -1) {
835 print_string(PRINT_ANY, "tos", "tos %s ",
836 rtnl_dsfield_n2a(r->rtm_tos, b1, sizeof(b1)));
837 }
838
839 if (tb[RTA_GATEWAY] && filter.rvia.bitlen != host_len)
840 print_rta_gateway(fp, r->rtm_family, tb[RTA_GATEWAY]);
841
842 if (tb[RTA_VIA])
843 print_rta_via(fp, tb[RTA_VIA]);
844
845 if (tb[RTA_OIF] && filter.oifmask != -1)
846 print_rta_if(fp, tb[RTA_OIF], "dev");
847
848 if (table && (table != RT_TABLE_MAIN || show_details > 0) && !filter.tb)
849 print_string(PRINT_ANY,
850 "table", "table %s ",
851 rtnl_rttable_n2a(table, b1, sizeof(b1)));
852
853 if (!(r->rtm_flags & RTM_F_CLONED)) {
854 if ((r->rtm_protocol != RTPROT_BOOT || show_details > 0) &&
855 filter.protocolmask != -1)
856 print_string(PRINT_ANY,
857 "protocol", "proto %s ",
858 rtnl_rtprot_n2a(r->rtm_protocol,
859 b1, sizeof(b1)));
860
861 if ((r->rtm_scope != RT_SCOPE_UNIVERSE || show_details > 0) &&
862 filter.scopemask != -1)
863 print_string(PRINT_ANY,
864 "scope", "scope %s ",
865 rtnl_rtscope_n2a(r->rtm_scope,
866 b1, sizeof(b1)));
867 }
868
869 if (tb[RTA_PREFSRC] && filter.rprefsrc.bitlen != host_len) {
870 const char *psrc
871 = rt_addr_n2a_rta(r->rtm_family, tb[RTA_PREFSRC]);
872
873 /* Do not use format_host(). It is our local addr
874 and symbolic name will not be useful.
875 */
876 if (is_json_context())
877 print_string(PRINT_JSON, "prefsrc", NULL, psrc);
878 else {
879 fprintf(fp, "src ");
880 print_color_string(PRINT_FP,
881 ifa_family_color(r->rtm_family),
882 NULL, "%s ", psrc);
883 }
884
885 }
886
887 if (tb[RTA_PRIORITY] && filter.metricmask != -1)
888 print_uint(PRINT_ANY, "metric", "metric %u ",
889 rta_getattr_u32(tb[RTA_PRIORITY]));
890
891 print_rt_flags(fp, r->rtm_flags);
892
893 if (tb[RTA_MARK]) {
894 unsigned int mark = rta_getattr_u32(tb[RTA_MARK]);
895
896 if (mark) {
897 if (is_json_context())
898 print_uint(PRINT_JSON, "mark", NULL, mark);
899 else if (mark >= 16)
900 print_0xhex(PRINT_FP, NULL,
901 "mark 0x%llx ", mark);
902 else
903 print_uint(PRINT_FP, NULL,
904 "mark %u ", mark);
905 }
906 }
907
908 if (tb[RTA_FLOW] && filter.realmmask != ~0U)
909 print_rta_flow(fp, tb[RTA_FLOW]);
910
911 if (tb[RTA_UID])
912 print_uint(PRINT_ANY, "uid", "uid %u ",
913 rta_getattr_u32(tb[RTA_UID]));
914
915 if (r->rtm_family == AF_INET) {
916 if (r->rtm_flags & RTM_F_CLONED)
917 print_cache_flags(fp, r->rtm_flags);
918
919 if (tb[RTA_CACHEINFO])
920 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
921 } else if (r->rtm_family == AF_INET6) {
922 if (tb[RTA_CACHEINFO])
923 print_rta_cacheinfo(fp, RTA_DATA(tb[RTA_CACHEINFO]));
924 }
925
926 if (tb[RTA_METRICS])
927 print_rta_metrics(fp, tb[RTA_METRICS]);
928
929 if (tb[RTA_IIF] && filter.iifmask != -1)
930 print_rta_if(fp, tb[RTA_IIF], "iif");
931
932 if (tb[RTA_MULTIPATH])
933 print_rta_multipath(fp, r, tb[RTA_MULTIPATH]);
934
935 if (tb[RTA_PREF])
936 print_rt_pref(fp, rta_getattr_u8(tb[RTA_PREF]));
937
938 if (tb[RTA_TTL_PROPAGATE]) {
939 bool propagate = rta_getattr_u8(tb[RTA_TTL_PROPAGATE]);
940
941 if (is_json_context())
942 print_bool(PRINT_JSON, "ttl-propogate", NULL,
943 propagate);
944 else
945 print_string(PRINT_FP, NULL,
946 "ttl-propogate %s",
947 propagate ? "enabled" : "disabled");
948 }
949
950 print_string(PRINT_FP, NULL, "\n", NULL);
951 close_json_object();
952 fflush(fp);
953 return 0;
954 }
955
956 static int parse_one_nh(struct nlmsghdr *n, struct rtmsg *r,
957 struct rtattr *rta, size_t len, struct rtnexthop *rtnh,
958 int *argcp, char ***argvp)
959 {
960 int argc = *argcp;
961 char **argv = *argvp;
962
963 while (++argv, --argc > 0) {
964 if (strcmp(*argv, "via") == 0) {
965 inet_prefix addr;
966 int family;
967
968 NEXT_ARG();
969 family = read_family(*argv);
970 if (family == AF_UNSPEC)
971 family = r->rtm_family;
972 else
973 NEXT_ARG();
974 get_addr(&addr, *argv, family);
975 if (r->rtm_family == AF_UNSPEC)
976 r->rtm_family = addr.family;
977 if (addr.family == r->rtm_family) {
978 if (rta_addattr_l(rta, len, RTA_GATEWAY,
979 &addr.data, addr.bytelen))
980 return -1;
981 rtnh->rtnh_len += sizeof(struct rtattr)
982 + addr.bytelen;
983 } else {
984 if (rta_addattr_l(rta, len, RTA_VIA,
985 &addr.family, addr.bytelen + 2))
986 return -1;
987 rtnh->rtnh_len += RTA_SPACE(addr.bytelen + 2);
988 }
989 } else if (strcmp(*argv, "dev") == 0) {
990 NEXT_ARG();
991 rtnh->rtnh_ifindex = ll_name_to_index(*argv);
992 if (!rtnh->rtnh_ifindex)
993 return nodev(*argv);
994 } else if (strcmp(*argv, "weight") == 0) {
995 unsigned int w;
996
997 NEXT_ARG();
998 if (get_unsigned(&w, *argv, 0) || w == 0 || w > 256)
999 invarg("\"weight\" is invalid\n", *argv);
1000 rtnh->rtnh_hops = w - 1;
1001 } else if (strcmp(*argv, "onlink") == 0) {
1002 rtnh->rtnh_flags |= RTNH_F_ONLINK;
1003 } else if (matches(*argv, "realms") == 0) {
1004 __u32 realm;
1005
1006 NEXT_ARG();
1007 if (get_rt_realms_or_raw(&realm, *argv))
1008 invarg("\"realm\" value is invalid\n", *argv);
1009 if (rta_addattr32(rta, len, RTA_FLOW, realm))
1010 return -1;
1011 rtnh->rtnh_len += sizeof(struct rtattr) + 4;
1012 } else if (strcmp(*argv, "encap") == 0) {
1013 int old_len = rta->rta_len;
1014
1015 if (lwt_parse_encap(rta, len, &argc, &argv,
1016 RTA_ENCAP, RTA_ENCAP_TYPE))
1017 return -1;
1018 rtnh->rtnh_len += rta->rta_len - old_len;
1019 } else if (strcmp(*argv, "as") == 0) {
1020 inet_prefix addr;
1021
1022 NEXT_ARG();
1023 if (strcmp(*argv, "to") == 0)
1024 NEXT_ARG();
1025 get_addr(&addr, *argv, r->rtm_family);
1026 if (rta_addattr_l(rta, len, RTA_NEWDST,
1027 &addr.data, addr.bytelen))
1028 return -1;
1029 rtnh->rtnh_len += sizeof(struct rtattr) + addr.bytelen;
1030 } else
1031 break;
1032 }
1033 *argcp = argc;
1034 *argvp = argv;
1035 return 0;
1036 }
1037
1038 static int parse_nexthops(struct nlmsghdr *n, struct rtmsg *r,
1039 int argc, char **argv)
1040 {
1041 char buf[4096];
1042 struct rtattr *rta = (void *)buf;
1043 struct rtnexthop *rtnh;
1044
1045 rta->rta_type = RTA_MULTIPATH;
1046 rta->rta_len = RTA_LENGTH(0);
1047 rtnh = RTA_DATA(rta);
1048
1049 while (argc > 0) {
1050 if (strcmp(*argv, "nexthop") != 0) {
1051 fprintf(stderr, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv);
1052 exit(-1);
1053 }
1054 if (argc <= 1) {
1055 fprintf(stderr, "Error: unexpected end of line after \"nexthop\"\n");
1056 exit(-1);
1057 }
1058 memset(rtnh, 0, sizeof(*rtnh));
1059 rtnh->rtnh_len = sizeof(*rtnh);
1060 rta->rta_len += rtnh->rtnh_len;
1061 if (parse_one_nh(n, r, rta, 4096, rtnh, &argc, &argv)) {
1062 fprintf(stderr, "Error: cannot parse nexthop\n");
1063 exit(-1);
1064 }
1065 rtnh = RTNH_NEXT(rtnh);
1066 }
1067
1068 if (rta->rta_len > RTA_LENGTH(0))
1069 return addattr_l(n, 4096, RTA_MULTIPATH,
1070 RTA_DATA(rta), RTA_PAYLOAD(rta));
1071 return 0;
1072 }
1073
1074 static int iproute_modify(int cmd, unsigned int flags, int argc, char **argv)
1075 {
1076 struct {
1077 struct nlmsghdr n;
1078 struct rtmsg r;
1079 char buf[4096];
1080 } req = {
1081 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1082 .n.nlmsg_flags = NLM_F_REQUEST | flags,
1083 .n.nlmsg_type = cmd,
1084 .r.rtm_family = preferred_family,
1085 .r.rtm_table = RT_TABLE_MAIN,
1086 .r.rtm_scope = RT_SCOPE_NOWHERE,
1087 };
1088 char mxbuf[256];
1089 struct rtattr *mxrta = (void *)mxbuf;
1090 unsigned int mxlock = 0;
1091 char *d = NULL;
1092 int gw_ok = 0;
1093 int dst_ok = 0;
1094 int nhs_ok = 0;
1095 int scope_ok = 0;
1096 int table_ok = 0;
1097 int raw = 0;
1098 int type_ok = 0;
1099 __u32 nhid = 0;
1100
1101 if (cmd != RTM_DELROUTE) {
1102 req.r.rtm_protocol = RTPROT_BOOT;
1103 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1104 req.r.rtm_type = RTN_UNICAST;
1105 }
1106
1107 mxrta->rta_type = RTA_METRICS;
1108 mxrta->rta_len = RTA_LENGTH(0);
1109
1110 while (argc > 0) {
1111 if (strcmp(*argv, "src") == 0) {
1112 inet_prefix addr;
1113
1114 NEXT_ARG();
1115 get_addr(&addr, *argv, req.r.rtm_family);
1116 if (req.r.rtm_family == AF_UNSPEC)
1117 req.r.rtm_family = addr.family;
1118 addattr_l(&req.n, sizeof(req),
1119 RTA_PREFSRC, &addr.data, addr.bytelen);
1120 } else if (strcmp(*argv, "as") == 0) {
1121 inet_prefix addr;
1122
1123 NEXT_ARG();
1124 if (strcmp(*argv, "to") == 0) {
1125 NEXT_ARG();
1126 }
1127 get_addr(&addr, *argv, req.r.rtm_family);
1128 if (req.r.rtm_family == AF_UNSPEC)
1129 req.r.rtm_family = addr.family;
1130 addattr_l(&req.n, sizeof(req),
1131 RTA_NEWDST, &addr.data, addr.bytelen);
1132 } else if (strcmp(*argv, "via") == 0) {
1133 inet_prefix addr;
1134 int family;
1135
1136 if (gw_ok) {
1137 invarg("use nexthop syntax to specify multiple via\n",
1138 *argv);
1139 }
1140 gw_ok = 1;
1141 NEXT_ARG();
1142 family = read_family(*argv);
1143 if (family == AF_UNSPEC)
1144 family = req.r.rtm_family;
1145 else
1146 NEXT_ARG();
1147 get_addr(&addr, *argv, family);
1148 if (req.r.rtm_family == AF_UNSPEC)
1149 req.r.rtm_family = addr.family;
1150 if (addr.family == req.r.rtm_family)
1151 addattr_l(&req.n, sizeof(req), RTA_GATEWAY,
1152 &addr.data, addr.bytelen);
1153 else
1154 addattr_l(&req.n, sizeof(req), RTA_VIA,
1155 &addr.family, addr.bytelen+2);
1156 } else if (strcmp(*argv, "from") == 0) {
1157 inet_prefix addr;
1158
1159 NEXT_ARG();
1160 get_prefix(&addr, *argv, req.r.rtm_family);
1161 if (req.r.rtm_family == AF_UNSPEC)
1162 req.r.rtm_family = addr.family;
1163 if (addr.bytelen)
1164 addattr_l(&req.n, sizeof(req), RTA_SRC, &addr.data, addr.bytelen);
1165 req.r.rtm_src_len = addr.bitlen;
1166 } else if (strcmp(*argv, "tos") == 0 ||
1167 matches(*argv, "dsfield") == 0) {
1168 __u32 tos;
1169
1170 NEXT_ARG();
1171 if (rtnl_dsfield_a2n(&tos, *argv))
1172 invarg("\"tos\" value is invalid\n", *argv);
1173 req.r.rtm_tos = tos;
1174 } else if (strcmp(*argv, "expires") == 0) {
1175 __u32 expires;
1176
1177 NEXT_ARG();
1178 if (get_u32(&expires, *argv, 0))
1179 invarg("\"expires\" value is invalid\n", *argv);
1180 addattr32(&req.n, sizeof(req), RTA_EXPIRES, expires);
1181 } else if (matches(*argv, "metric") == 0 ||
1182 matches(*argv, "priority") == 0 ||
1183 strcmp(*argv, "preference") == 0) {
1184 __u32 metric;
1185
1186 NEXT_ARG();
1187 if (get_u32(&metric, *argv, 0))
1188 invarg("\"metric\" value is invalid\n", *argv);
1189 addattr32(&req.n, sizeof(req), RTA_PRIORITY, metric);
1190 } else if (strcmp(*argv, "scope") == 0) {
1191 __u32 scope = 0;
1192
1193 NEXT_ARG();
1194 if (rtnl_rtscope_a2n(&scope, *argv))
1195 invarg("invalid \"scope\" value\n", *argv);
1196 req.r.rtm_scope = scope;
1197 scope_ok = 1;
1198 } else if (strcmp(*argv, "mtu") == 0) {
1199 unsigned int mtu;
1200
1201 NEXT_ARG();
1202 if (strcmp(*argv, "lock") == 0) {
1203 mxlock |= (1<<RTAX_MTU);
1204 NEXT_ARG();
1205 }
1206 if (get_unsigned(&mtu, *argv, 0))
1207 invarg("\"mtu\" value is invalid\n", *argv);
1208 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_MTU, mtu);
1209 } else if (strcmp(*argv, "hoplimit") == 0) {
1210 unsigned int hoplimit;
1211
1212 NEXT_ARG();
1213 if (strcmp(*argv, "lock") == 0) {
1214 mxlock |= (1<<RTAX_HOPLIMIT);
1215 NEXT_ARG();
1216 }
1217 if (get_unsigned(&hoplimit, *argv, 0) || hoplimit > 255)
1218 invarg("\"hoplimit\" value is invalid\n", *argv);
1219 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_HOPLIMIT, hoplimit);
1220 } else if (strcmp(*argv, "advmss") == 0) {
1221 unsigned int mss;
1222
1223 NEXT_ARG();
1224 if (strcmp(*argv, "lock") == 0) {
1225 mxlock |= (1<<RTAX_ADVMSS);
1226 NEXT_ARG();
1227 }
1228 if (get_unsigned(&mss, *argv, 0))
1229 invarg("\"mss\" value is invalid\n", *argv);
1230 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_ADVMSS, mss);
1231 } else if (matches(*argv, "reordering") == 0) {
1232 unsigned int reord;
1233
1234 NEXT_ARG();
1235 if (strcmp(*argv, "lock") == 0) {
1236 mxlock |= (1<<RTAX_REORDERING);
1237 NEXT_ARG();
1238 }
1239 if (get_unsigned(&reord, *argv, 0))
1240 invarg("\"reordering\" value is invalid\n", *argv);
1241 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_REORDERING, reord);
1242 } else if (strcmp(*argv, "rtt") == 0) {
1243 unsigned int rtt;
1244
1245 NEXT_ARG();
1246 if (strcmp(*argv, "lock") == 0) {
1247 mxlock |= (1<<RTAX_RTT);
1248 NEXT_ARG();
1249 }
1250 if (get_time_rtt(&rtt, *argv, &raw))
1251 invarg("\"rtt\" value is invalid\n", *argv);
1252 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTT,
1253 (raw) ? rtt : rtt * 8);
1254 } else if (strcmp(*argv, "rto_min") == 0) {
1255 unsigned int rto_min;
1256
1257 NEXT_ARG();
1258 mxlock |= (1<<RTAX_RTO_MIN);
1259 if (get_time_rtt(&rto_min, *argv, &raw))
1260 invarg("\"rto_min\" value is invalid\n",
1261 *argv);
1262 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTO_MIN,
1263 rto_min);
1264 } else if (matches(*argv, "window") == 0) {
1265 unsigned int win;
1266
1267 NEXT_ARG();
1268 if (strcmp(*argv, "lock") == 0) {
1269 mxlock |= (1<<RTAX_WINDOW);
1270 NEXT_ARG();
1271 }
1272 if (get_unsigned(&win, *argv, 0))
1273 invarg("\"window\" value is invalid\n", *argv);
1274 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_WINDOW, win);
1275 } else if (matches(*argv, "cwnd") == 0) {
1276 unsigned int win;
1277
1278 NEXT_ARG();
1279 if (strcmp(*argv, "lock") == 0) {
1280 mxlock |= (1<<RTAX_CWND);
1281 NEXT_ARG();
1282 }
1283 if (get_unsigned(&win, *argv, 0))
1284 invarg("\"cwnd\" value is invalid\n", *argv);
1285 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_CWND, win);
1286 } else if (matches(*argv, "initcwnd") == 0) {
1287 unsigned int win;
1288
1289 NEXT_ARG();
1290 if (strcmp(*argv, "lock") == 0) {
1291 mxlock |= (1<<RTAX_INITCWND);
1292 NEXT_ARG();
1293 }
1294 if (get_unsigned(&win, *argv, 0))
1295 invarg("\"initcwnd\" value is invalid\n", *argv);
1296 rta_addattr32(mxrta, sizeof(mxbuf),
1297 RTAX_INITCWND, win);
1298 } else if (matches(*argv, "initrwnd") == 0) {
1299 unsigned int win;
1300
1301 NEXT_ARG();
1302 if (strcmp(*argv, "lock") == 0) {
1303 mxlock |= (1<<RTAX_INITRWND);
1304 NEXT_ARG();
1305 }
1306 if (get_unsigned(&win, *argv, 0))
1307 invarg("\"initrwnd\" value is invalid\n", *argv);
1308 rta_addattr32(mxrta, sizeof(mxbuf),
1309 RTAX_INITRWND, win);
1310 } else if (matches(*argv, "features") == 0) {
1311 unsigned int features = 0;
1312
1313 while (argc > 0) {
1314 NEXT_ARG();
1315
1316 if (strcmp(*argv, "ecn") == 0)
1317 features |= RTAX_FEATURE_ECN;
1318 else
1319 invarg("\"features\" value not valid\n", *argv);
1320 break;
1321 }
1322
1323 rta_addattr32(mxrta, sizeof(mxbuf),
1324 RTAX_FEATURES, features);
1325 } else if (matches(*argv, "quickack") == 0) {
1326 unsigned int quickack;
1327
1328 NEXT_ARG();
1329 if (get_unsigned(&quickack, *argv, 0))
1330 invarg("\"quickack\" value is invalid\n", *argv);
1331 if (quickack != 1 && quickack != 0)
1332 invarg("\"quickack\" value should be 0 or 1\n", *argv);
1333 rta_addattr32(mxrta, sizeof(mxbuf),
1334 RTAX_QUICKACK, quickack);
1335 } else if (matches(*argv, "congctl") == 0) {
1336 NEXT_ARG();
1337 if (strcmp(*argv, "lock") == 0) {
1338 mxlock |= 1 << RTAX_CC_ALGO;
1339 NEXT_ARG();
1340 }
1341 rta_addattr_l(mxrta, sizeof(mxbuf), RTAX_CC_ALGO, *argv,
1342 strlen(*argv));
1343 } else if (matches(*argv, "rttvar") == 0) {
1344 unsigned int win;
1345
1346 NEXT_ARG();
1347 if (strcmp(*argv, "lock") == 0) {
1348 mxlock |= (1<<RTAX_RTTVAR);
1349 NEXT_ARG();
1350 }
1351 if (get_time_rtt(&win, *argv, &raw))
1352 invarg("\"rttvar\" value is invalid\n", *argv);
1353 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_RTTVAR,
1354 (raw) ? win : win * 4);
1355 } else if (matches(*argv, "ssthresh") == 0) {
1356 unsigned int win;
1357
1358 NEXT_ARG();
1359 if (strcmp(*argv, "lock") == 0) {
1360 mxlock |= (1<<RTAX_SSTHRESH);
1361 NEXT_ARG();
1362 }
1363 if (get_unsigned(&win, *argv, 0))
1364 invarg("\"ssthresh\" value is invalid\n", *argv);
1365 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_SSTHRESH, win);
1366 } else if (matches(*argv, "realms") == 0) {
1367 __u32 realm;
1368
1369 NEXT_ARG();
1370 if (get_rt_realms_or_raw(&realm, *argv))
1371 invarg("\"realm\" value is invalid\n", *argv);
1372 addattr32(&req.n, sizeof(req), RTA_FLOW, realm);
1373 } else if (strcmp(*argv, "onlink") == 0) {
1374 req.r.rtm_flags |= RTNH_F_ONLINK;
1375 } else if (strcmp(*argv, "nexthop") == 0) {
1376 nhs_ok = 1;
1377 break;
1378 } else if (!strcmp(*argv, "nhid")) {
1379 NEXT_ARG();
1380 if (get_u32(&nhid, *argv, 0))
1381 invarg("\"id\" value is invalid\n", *argv);
1382 addattr32(&req.n, sizeof(req), RTA_NH_ID, nhid);
1383 } else if (matches(*argv, "protocol") == 0) {
1384 __u32 prot;
1385
1386 NEXT_ARG();
1387 if (rtnl_rtprot_a2n(&prot, *argv))
1388 invarg("\"protocol\" value is invalid\n", *argv);
1389 req.r.rtm_protocol = prot;
1390 } else if (matches(*argv, "table") == 0) {
1391 __u32 tid;
1392
1393 NEXT_ARG();
1394 if (rtnl_rttable_a2n(&tid, *argv))
1395 invarg("\"table\" value is invalid\n", *argv);
1396 if (tid < 256)
1397 req.r.rtm_table = tid;
1398 else {
1399 req.r.rtm_table = RT_TABLE_UNSPEC;
1400 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1401 }
1402 table_ok = 1;
1403 } else if (matches(*argv, "vrf") == 0) {
1404 __u32 tid;
1405
1406 NEXT_ARG();
1407 tid = ipvrf_get_table(*argv);
1408 if (tid == 0)
1409 invarg("Invalid VRF\n", *argv);
1410 if (tid < 256)
1411 req.r.rtm_table = tid;
1412 else {
1413 req.r.rtm_table = RT_TABLE_UNSPEC;
1414 addattr32(&req.n, sizeof(req), RTA_TABLE, tid);
1415 }
1416 table_ok = 1;
1417 } else if (strcmp(*argv, "dev") == 0 ||
1418 strcmp(*argv, "oif") == 0) {
1419 NEXT_ARG();
1420 d = *argv;
1421 } else if (matches(*argv, "pref") == 0) {
1422 __u8 pref;
1423
1424 NEXT_ARG();
1425 if (strcmp(*argv, "low") == 0)
1426 pref = ICMPV6_ROUTER_PREF_LOW;
1427 else if (strcmp(*argv, "medium") == 0)
1428 pref = ICMPV6_ROUTER_PREF_MEDIUM;
1429 else if (strcmp(*argv, "high") == 0)
1430 pref = ICMPV6_ROUTER_PREF_HIGH;
1431 else if (get_u8(&pref, *argv, 0))
1432 invarg("\"pref\" value is invalid\n", *argv);
1433 addattr8(&req.n, sizeof(req), RTA_PREF, pref);
1434 } else if (strcmp(*argv, "encap") == 0) {
1435 char buf[1024];
1436 struct rtattr *rta = (void *)buf;
1437
1438 rta->rta_type = RTA_ENCAP;
1439 rta->rta_len = RTA_LENGTH(0);
1440
1441 lwt_parse_encap(rta, sizeof(buf), &argc, &argv,
1442 RTA_ENCAP, RTA_ENCAP_TYPE);
1443
1444 if (rta->rta_len > RTA_LENGTH(0))
1445 addraw_l(&req.n, 1024
1446 , RTA_DATA(rta), RTA_PAYLOAD(rta));
1447 } else if (strcmp(*argv, "ttl-propagate") == 0) {
1448 __u8 ttl_prop;
1449
1450 NEXT_ARG();
1451 if (matches(*argv, "enabled") == 0)
1452 ttl_prop = 1;
1453 else if (matches(*argv, "disabled") == 0)
1454 ttl_prop = 0;
1455 else
1456 invarg("\"ttl-propagate\" value is invalid\n",
1457 *argv);
1458
1459 addattr8(&req.n, sizeof(req), RTA_TTL_PROPAGATE,
1460 ttl_prop);
1461 } else if (matches(*argv, "fastopen_no_cookie") == 0) {
1462 unsigned int fastopen_no_cookie;
1463
1464 NEXT_ARG();
1465 if (get_unsigned(&fastopen_no_cookie, *argv, 0))
1466 invarg("\"fastopen_no_cookie\" value is invalid\n", *argv);
1467 if (fastopen_no_cookie != 1 && fastopen_no_cookie != 0)
1468 invarg("\"fastopen_no_cookie\" value should be 0 or 1\n", *argv);
1469 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_FASTOPEN_NO_COOKIE, fastopen_no_cookie);
1470 } else {
1471 int type;
1472 inet_prefix dst;
1473
1474 if (strcmp(*argv, "to") == 0) {
1475 NEXT_ARG();
1476 }
1477 if ((**argv < '0' || **argv > '9') &&
1478 rtnl_rtntype_a2n(&type, *argv) == 0) {
1479 NEXT_ARG();
1480 req.r.rtm_type = type;
1481 type_ok = 1;
1482 }
1483
1484 if (matches(*argv, "help") == 0)
1485 usage();
1486 if (dst_ok)
1487 duparg2("to", *argv);
1488 get_prefix(&dst, *argv, req.r.rtm_family);
1489 if (req.r.rtm_family == AF_UNSPEC)
1490 req.r.rtm_family = dst.family;
1491 req.r.rtm_dst_len = dst.bitlen;
1492 dst_ok = 1;
1493 if (dst.bytelen)
1494 addattr_l(&req.n, sizeof(req),
1495 RTA_DST, &dst.data, dst.bytelen);
1496 }
1497 argc--; argv++;
1498 }
1499
1500 if (!dst_ok)
1501 usage();
1502
1503 if (d) {
1504 int idx = ll_name_to_index(d);
1505
1506 if (!idx)
1507 return nodev(d);
1508 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
1509 }
1510
1511 if (mxrta->rta_len > RTA_LENGTH(0)) {
1512 if (mxlock)
1513 rta_addattr32(mxrta, sizeof(mxbuf), RTAX_LOCK, mxlock);
1514 addattr_l(&req.n, sizeof(req), RTA_METRICS, RTA_DATA(mxrta), RTA_PAYLOAD(mxrta));
1515 }
1516
1517 if (nhs_ok && parse_nexthops(&req.n, &req.r, argc, argv))
1518 return -1;
1519
1520 if (req.r.rtm_family == AF_UNSPEC)
1521 req.r.rtm_family = AF_INET;
1522
1523 if (!table_ok) {
1524 if (req.r.rtm_type == RTN_LOCAL ||
1525 req.r.rtm_type == RTN_BROADCAST ||
1526 req.r.rtm_type == RTN_NAT ||
1527 req.r.rtm_type == RTN_ANYCAST)
1528 req.r.rtm_table = RT_TABLE_LOCAL;
1529 }
1530 if (!scope_ok) {
1531 if (req.r.rtm_family == AF_INET6 ||
1532 req.r.rtm_family == AF_MPLS)
1533 req.r.rtm_scope = RT_SCOPE_UNIVERSE;
1534 else if (req.r.rtm_type == RTN_LOCAL ||
1535 req.r.rtm_type == RTN_NAT)
1536 req.r.rtm_scope = RT_SCOPE_HOST;
1537 else if (req.r.rtm_type == RTN_BROADCAST ||
1538 req.r.rtm_type == RTN_MULTICAST ||
1539 req.r.rtm_type == RTN_ANYCAST)
1540 req.r.rtm_scope = RT_SCOPE_LINK;
1541 else if (req.r.rtm_type == RTN_UNICAST ||
1542 req.r.rtm_type == RTN_UNSPEC) {
1543 if (cmd == RTM_DELROUTE)
1544 req.r.rtm_scope = RT_SCOPE_NOWHERE;
1545 else if (!gw_ok && !nhs_ok && !nhid)
1546 req.r.rtm_scope = RT_SCOPE_LINK;
1547 }
1548 }
1549
1550 if (!type_ok && req.r.rtm_family == AF_MPLS)
1551 req.r.rtm_type = RTN_UNICAST;
1552
1553 if (rtnl_talk(&rth, &req.n, NULL) < 0)
1554 return -2;
1555
1556 return 0;
1557 }
1558
1559 static int iproute_flush_cache(void)
1560 {
1561 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1562
1563 int len;
1564 int flush_fd = open(ROUTE_FLUSH_PATH, O_WRONLY);
1565 char *buffer = "-1";
1566
1567 if (flush_fd < 0) {
1568 fprintf(stderr, "Cannot open \"%s\": %s\n",
1569 ROUTE_FLUSH_PATH, strerror(errno));
1570 return -1;
1571 }
1572
1573 len = strlen(buffer);
1574
1575 if ((write(flush_fd, (void *)buffer, len)) < len) {
1576 fprintf(stderr, "Cannot flush routing cache\n");
1577 close(flush_fd);
1578 return -1;
1579 }
1580 close(flush_fd);
1581 return 0;
1582 }
1583
1584 static __u32 route_dump_magic = 0x45311224;
1585
1586 static int save_route(struct nlmsghdr *n, void *arg)
1587 {
1588 int ret;
1589 int len = n->nlmsg_len;
1590 struct rtmsg *r = NLMSG_DATA(n);
1591 struct rtattr *tb[RTA_MAX+1];
1592 int host_len;
1593
1594 host_len = af_bit_len(r->rtm_family);
1595 len -= NLMSG_LENGTH(sizeof(*r));
1596 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
1597
1598 if (!filter_nlmsg(n, tb, host_len))
1599 return 0;
1600
1601 ret = write(STDOUT_FILENO, n, n->nlmsg_len);
1602 if ((ret > 0) && (ret != n->nlmsg_len)) {
1603 fprintf(stderr, "Short write while saving nlmsg\n");
1604 ret = -EIO;
1605 }
1606
1607 return ret == n->nlmsg_len ? 0 : ret;
1608 }
1609
1610 static int save_route_prep(void)
1611 {
1612 int ret;
1613
1614 if (isatty(STDOUT_FILENO)) {
1615 fprintf(stderr, "Not sending a binary stream to stdout\n");
1616 return -1;
1617 }
1618
1619 ret = write(STDOUT_FILENO, &route_dump_magic, sizeof(route_dump_magic));
1620 if (ret != sizeof(route_dump_magic)) {
1621 fprintf(stderr, "Can't write magic to dump file\n");
1622 return -1;
1623 }
1624
1625 return 0;
1626 }
1627
1628 static int iproute_dump_filter(struct nlmsghdr *nlh, int reqlen)
1629 {
1630 struct rtmsg *rtm = NLMSG_DATA(nlh);
1631 int err;
1632
1633 rtm->rtm_protocol = filter.protocol;
1634 if (filter.cloned)
1635 rtm->rtm_flags |= RTM_F_CLONED;
1636
1637 if (filter.tb) {
1638 err = addattr32(nlh, reqlen, RTA_TABLE, filter.tb);
1639 if (err)
1640 return err;
1641 }
1642
1643 if (filter.oif) {
1644 err = addattr32(nlh, reqlen, RTA_OIF, filter.oif);
1645 if (err)
1646 return err;
1647 }
1648
1649 return 0;
1650 }
1651
1652 static int iproute_flush(int family, rtnl_filter_t filter_fn)
1653 {
1654 time_t start = time(0);
1655 char flushb[4096-512];
1656 int round = 0;
1657 int ret;
1658
1659 if (filter.cloned) {
1660 if (family != AF_INET6) {
1661 iproute_flush_cache();
1662 if (show_stats)
1663 printf("*** IPv4 routing cache is flushed.\n");
1664 }
1665 if (family == AF_INET)
1666 return 0;
1667 }
1668
1669 filter.flushb = flushb;
1670 filter.flushp = 0;
1671 filter.flushe = sizeof(flushb);
1672
1673 for (;;) {
1674 if (rtnl_routedump_req(&rth, family, iproute_dump_filter) < 0) {
1675 perror("Cannot send dump request");
1676 return -2;
1677 }
1678 filter.flushed = 0;
1679 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1680 fprintf(stderr, "Flush terminated\n");
1681 return -2;
1682 }
1683 if (filter.flushed == 0) {
1684 if (show_stats) {
1685 if (round == 0 &&
1686 (!filter.cloned || family == AF_INET6))
1687 printf("Nothing to flush.\n");
1688 else
1689 printf("*** Flush is complete after %d round%s ***\n",
1690 round, round > 1 ? "s" : "");
1691 }
1692 fflush(stdout);
1693 return 0;
1694 }
1695 round++;
1696 ret = flush_update();
1697 if (ret < 0)
1698 return ret;
1699
1700 if (time(0) - start > 30) {
1701 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1702 (long)(time(0) - start), filter.flushed);
1703 return -1;
1704 }
1705
1706 if (show_stats) {
1707 printf("\n*** Round %d, deleting %d entries ***\n",
1708 round, filter.flushed);
1709 fflush(stdout);
1710 }
1711 }
1712 }
1713
1714 static int iproute_list_flush_or_save(int argc, char **argv, int action)
1715 {
1716 int dump_family = preferred_family;
1717 char *id = NULL;
1718 char *od = NULL;
1719 unsigned int mark = 0;
1720 rtnl_filter_t filter_fn;
1721
1722 if (action == IPROUTE_SAVE) {
1723 if (save_route_prep())
1724 return -1;
1725
1726 filter_fn = save_route;
1727 } else
1728 filter_fn = print_route;
1729
1730 iproute_reset_filter(0);
1731 filter.tb = RT_TABLE_MAIN;
1732
1733 if ((action == IPROUTE_FLUSH) && argc <= 0) {
1734 fprintf(stderr, "\"ip route flush\" requires arguments.\n");
1735 return -1;
1736 }
1737
1738 while (argc > 0) {
1739 if (matches(*argv, "table") == 0) {
1740 __u32 tid;
1741
1742 NEXT_ARG();
1743 if (rtnl_rttable_a2n(&tid, *argv)) {
1744 if (strcmp(*argv, "all") == 0) {
1745 filter.tb = 0;
1746 } else if (strcmp(*argv, "cache") == 0) {
1747 filter.cloned = 1;
1748 } else if (strcmp(*argv, "help") == 0) {
1749 usage();
1750 } else {
1751 invarg("table id value is invalid\n", *argv);
1752 }
1753 } else
1754 filter.tb = tid;
1755 } else if (matches(*argv, "vrf") == 0) {
1756 __u32 tid;
1757
1758 NEXT_ARG();
1759 tid = ipvrf_get_table(*argv);
1760 if (tid == 0)
1761 invarg("Invalid VRF\n", *argv);
1762 filter.tb = tid;
1763 filter.typemask = ~(1 << RTN_LOCAL | 1<<RTN_BROADCAST);
1764 } else if (matches(*argv, "cached") == 0 ||
1765 matches(*argv, "cloned") == 0) {
1766 filter.cloned = 1;
1767 } else if (strcmp(*argv, "tos") == 0 ||
1768 matches(*argv, "dsfield") == 0) {
1769 __u32 tos;
1770
1771 NEXT_ARG();
1772 if (rtnl_dsfield_a2n(&tos, *argv))
1773 invarg("TOS value is invalid\n", *argv);
1774 filter.tos = tos;
1775 filter.tosmask = -1;
1776 } else if (matches(*argv, "protocol") == 0) {
1777 __u32 prot = 0;
1778
1779 NEXT_ARG();
1780 filter.protocolmask = -1;
1781 if (rtnl_rtprot_a2n(&prot, *argv)) {
1782 if (strcmp(*argv, "all") != 0)
1783 invarg("invalid \"protocol\"\n", *argv);
1784 prot = 0;
1785 filter.protocolmask = 0;
1786 }
1787 filter.protocol = prot;
1788 } else if (matches(*argv, "scope") == 0) {
1789 __u32 scope = 0;
1790
1791 NEXT_ARG();
1792 filter.scopemask = -1;
1793 if (rtnl_rtscope_a2n(&scope, *argv)) {
1794 if (strcmp(*argv, "all") != 0)
1795 invarg("invalid \"scope\"\n", *argv);
1796 scope = RT_SCOPE_NOWHERE;
1797 filter.scopemask = 0;
1798 }
1799 filter.scope = scope;
1800 } else if (matches(*argv, "type") == 0) {
1801 int type;
1802
1803 NEXT_ARG();
1804 if (rtnl_rtntype_a2n(&type, *argv))
1805 invarg("node type value is invalid\n", *argv);
1806 filter.typemask = (1<<type);
1807 } else if (strcmp(*argv, "dev") == 0 ||
1808 strcmp(*argv, "oif") == 0) {
1809 NEXT_ARG();
1810 od = *argv;
1811 } else if (strcmp(*argv, "iif") == 0) {
1812 NEXT_ARG();
1813 id = *argv;
1814 } else if (strcmp(*argv, "mark") == 0) {
1815 NEXT_ARG();
1816 if (get_unsigned(&mark, *argv, 0))
1817 invarg("invalid mark value", *argv);
1818 filter.markmask = -1;
1819 } else if (matches(*argv, "metric") == 0 ||
1820 matches(*argv, "priority") == 0 ||
1821 strcmp(*argv, "preference") == 0) {
1822 __u32 metric;
1823
1824 NEXT_ARG();
1825 if (get_u32(&metric, *argv, 0))
1826 invarg("\"metric\" value is invalid\n", *argv);
1827 filter.metric = metric;
1828 filter.metricmask = -1;
1829 } else if (strcmp(*argv, "via") == 0) {
1830 int family;
1831
1832 NEXT_ARG();
1833 family = read_family(*argv);
1834 if (family == AF_UNSPEC)
1835 family = dump_family;
1836 else
1837 NEXT_ARG();
1838 get_prefix(&filter.rvia, *argv, family);
1839 } else if (strcmp(*argv, "src") == 0) {
1840 NEXT_ARG();
1841 get_prefix(&filter.rprefsrc, *argv, dump_family);
1842 } else if (matches(*argv, "realms") == 0) {
1843 __u32 realm;
1844
1845 NEXT_ARG();
1846 if (get_rt_realms_or_raw(&realm, *argv))
1847 invarg("invalid realms\n", *argv);
1848 filter.realm = realm;
1849 filter.realmmask = ~0U;
1850 if ((filter.realm&0xFFFF) == 0 &&
1851 (*argv)[strlen(*argv) - 1] == '/')
1852 filter.realmmask &= ~0xFFFF;
1853 if ((filter.realm&0xFFFF0000U) == 0 &&
1854 (strchr(*argv, '/') == NULL ||
1855 (*argv)[0] == '/'))
1856 filter.realmmask &= ~0xFFFF0000U;
1857 } else if (matches(*argv, "from") == 0) {
1858 NEXT_ARG();
1859 if (matches(*argv, "root") == 0) {
1860 NEXT_ARG();
1861 get_prefix(&filter.rsrc, *argv, dump_family);
1862 } else if (matches(*argv, "match") == 0) {
1863 NEXT_ARG();
1864 get_prefix(&filter.msrc, *argv, dump_family);
1865 } else {
1866 if (matches(*argv, "exact") == 0) {
1867 NEXT_ARG();
1868 }
1869 get_prefix(&filter.msrc, *argv, dump_family);
1870 filter.rsrc = filter.msrc;
1871 }
1872 } else {
1873 if (matches(*argv, "to") == 0) {
1874 NEXT_ARG();
1875 }
1876 if (matches(*argv, "root") == 0) {
1877 NEXT_ARG();
1878 get_prefix(&filter.rdst, *argv, dump_family);
1879 } else if (matches(*argv, "match") == 0) {
1880 NEXT_ARG();
1881 get_prefix(&filter.mdst, *argv, dump_family);
1882 } else {
1883 if (matches(*argv, "exact") == 0) {
1884 NEXT_ARG();
1885 }
1886 get_prefix(&filter.mdst, *argv, dump_family);
1887 filter.rdst = filter.mdst;
1888 }
1889 }
1890 argc--; argv++;
1891 }
1892
1893 if (dump_family == AF_UNSPEC && filter.tb)
1894 dump_family = AF_INET;
1895
1896 if (id || od) {
1897 int idx;
1898
1899 if (id) {
1900 idx = ll_name_to_index(id);
1901 if (!idx)
1902 return nodev(id);
1903 filter.iif = idx;
1904 filter.iifmask = -1;
1905 }
1906 if (od) {
1907 idx = ll_name_to_index(od);
1908 if (!idx)
1909 return nodev(od);
1910 filter.oif = idx;
1911 filter.oifmask = -1;
1912 }
1913 }
1914 filter.mark = mark;
1915
1916 if (action == IPROUTE_FLUSH)
1917 return iproute_flush(dump_family, filter_fn);
1918
1919 if (rtnl_routedump_req(&rth, dump_family, iproute_dump_filter) < 0) {
1920 perror("Cannot send dump request");
1921 return -2;
1922 }
1923
1924 new_json_obj(json);
1925
1926 if (rtnl_dump_filter(&rth, filter_fn, stdout) < 0) {
1927 fprintf(stderr, "Dump terminated\n");
1928 return -2;
1929 }
1930
1931 delete_json_obj();
1932 fflush(stdout);
1933 return 0;
1934 }
1935
1936
1937 static int iproute_get(int argc, char **argv)
1938 {
1939 struct {
1940 struct nlmsghdr n;
1941 struct rtmsg r;
1942 char buf[1024];
1943 } req = {
1944 .n.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg)),
1945 .n.nlmsg_flags = NLM_F_REQUEST,
1946 .n.nlmsg_type = RTM_GETROUTE,
1947 .r.rtm_family = preferred_family,
1948 };
1949 char *idev = NULL;
1950 char *odev = NULL;
1951 struct nlmsghdr *answer;
1952 int connected = 0;
1953 int fib_match = 0;
1954 int from_ok = 0;
1955 unsigned int mark = 0;
1956 bool address_found = false;
1957
1958 iproute_reset_filter(0);
1959 filter.cloned = 2;
1960
1961 while (argc > 0) {
1962 if (strcmp(*argv, "tos") == 0 ||
1963 matches(*argv, "dsfield") == 0) {
1964 __u32 tos;
1965
1966 NEXT_ARG();
1967 if (rtnl_dsfield_a2n(&tos, *argv))
1968 invarg("TOS value is invalid\n", *argv);
1969 req.r.rtm_tos = tos;
1970 } else if (matches(*argv, "from") == 0) {
1971 inet_prefix addr;
1972
1973 NEXT_ARG();
1974 if (matches(*argv, "help") == 0)
1975 usage();
1976 from_ok = 1;
1977 get_prefix(&addr, *argv, req.r.rtm_family);
1978 if (req.r.rtm_family == AF_UNSPEC)
1979 req.r.rtm_family = addr.family;
1980 if (addr.bytelen)
1981 addattr_l(&req.n, sizeof(req), RTA_SRC,
1982 &addr.data, addr.bytelen);
1983 req.r.rtm_src_len = addr.bitlen;
1984 } else if (matches(*argv, "iif") == 0) {
1985 NEXT_ARG();
1986 idev = *argv;
1987 } else if (matches(*argv, "mark") == 0) {
1988 NEXT_ARG();
1989 if (get_unsigned(&mark, *argv, 0))
1990 invarg("invalid mark value", *argv);
1991 } else if (matches(*argv, "oif") == 0 ||
1992 strcmp(*argv, "dev") == 0) {
1993 NEXT_ARG();
1994 odev = *argv;
1995 } else if (matches(*argv, "notify") == 0) {
1996 req.r.rtm_flags |= RTM_F_NOTIFY;
1997 } else if (matches(*argv, "connected") == 0) {
1998 connected = 1;
1999 } else if (matches(*argv, "vrf") == 0) {
2000 NEXT_ARG();
2001 if (!name_is_vrf(*argv))
2002 invarg("Invalid VRF\n", *argv);
2003 odev = *argv;
2004 } else if (matches(*argv, "uid") == 0) {
2005 uid_t uid;
2006
2007 NEXT_ARG();
2008 if (get_unsigned(&uid, *argv, 0))
2009 invarg("invalid UID\n", *argv);
2010 addattr32(&req.n, sizeof(req), RTA_UID, uid);
2011 } else if (matches(*argv, "fibmatch") == 0) {
2012 fib_match = 1;
2013 } else if (strcmp(*argv, "as") == 0) {
2014 inet_prefix addr;
2015
2016 NEXT_ARG();
2017 if (strcmp(*argv, "to") == 0)
2018 NEXT_ARG();
2019 get_addr(&addr, *argv, req.r.rtm_family);
2020 if (req.r.rtm_family == AF_UNSPEC)
2021 req.r.rtm_family = addr.family;
2022 addattr_l(&req.n, sizeof(req), RTA_NEWDST,
2023 &addr.data, addr.bytelen);
2024 } else if (matches(*argv, "sport") == 0) {
2025 __be16 sport;
2026
2027 NEXT_ARG();
2028 if (get_be16(&sport, *argv, 0))
2029 invarg("invalid sport\n", *argv);
2030 addattr16(&req.n, sizeof(req), RTA_SPORT, sport);
2031 } else if (matches(*argv, "dport") == 0) {
2032 __be16 dport;
2033
2034 NEXT_ARG();
2035 if (get_be16(&dport, *argv, 0))
2036 invarg("invalid dport\n", *argv);
2037 addattr16(&req.n, sizeof(req), RTA_DPORT, dport);
2038 } else if (matches(*argv, "ipproto") == 0) {
2039 int ipproto;
2040
2041 NEXT_ARG();
2042 ipproto = inet_proto_a2n(*argv);
2043 if (ipproto < 0)
2044 invarg("Invalid \"ipproto\" value\n",
2045 *argv);
2046 addattr8(&req.n, sizeof(req), RTA_IP_PROTO, ipproto);
2047 } else {
2048 inet_prefix addr;
2049
2050 if (strcmp(*argv, "to") == 0) {
2051 NEXT_ARG();
2052 }
2053 if (matches(*argv, "help") == 0)
2054 usage();
2055 get_prefix(&addr, *argv, req.r.rtm_family);
2056 if (req.r.rtm_family == AF_UNSPEC)
2057 req.r.rtm_family = addr.family;
2058 if (addr.bytelen)
2059 addattr_l(&req.n, sizeof(req),
2060 RTA_DST, &addr.data, addr.bytelen);
2061 req.r.rtm_dst_len = addr.bitlen;
2062 address_found = true;
2063 }
2064 argc--; argv++;
2065 }
2066
2067 if (!address_found) {
2068 fprintf(stderr, "need at least a destination address\n");
2069 return -1;
2070 }
2071
2072 if (idev || odev) {
2073 int idx;
2074
2075 if (idev) {
2076 idx = ll_name_to_index(idev);
2077 if (!idx)
2078 return nodev(idev);
2079 addattr32(&req.n, sizeof(req), RTA_IIF, idx);
2080 }
2081 if (odev) {
2082 idx = ll_name_to_index(odev);
2083 if (!idx)
2084 return nodev(odev);
2085 addattr32(&req.n, sizeof(req), RTA_OIF, idx);
2086 }
2087 }
2088 if (mark)
2089 addattr32(&req.n, sizeof(req), RTA_MARK, mark);
2090
2091 if (req.r.rtm_family == AF_UNSPEC)
2092 req.r.rtm_family = AF_INET;
2093
2094 /* Only IPv4 supports the RTM_F_LOOKUP_TABLE flag */
2095 if (req.r.rtm_family == AF_INET)
2096 req.r.rtm_flags |= RTM_F_LOOKUP_TABLE;
2097 if (fib_match)
2098 req.r.rtm_flags |= RTM_F_FIB_MATCH;
2099
2100 if (rtnl_talk(&rth, &req.n, &answer) < 0)
2101 return -2;
2102
2103 new_json_obj(json);
2104
2105 if (connected && !from_ok) {
2106 struct rtmsg *r = NLMSG_DATA(answer);
2107 int len = answer->nlmsg_len;
2108 struct rtattr *tb[RTA_MAX+1];
2109
2110 if (print_route(answer, (void *)stdout) < 0) {
2111 fprintf(stderr, "An error :-)\n");
2112 free(answer);
2113 return -1;
2114 }
2115
2116 if (answer->nlmsg_type != RTM_NEWROUTE) {
2117 fprintf(stderr, "Not a route?\n");
2118 free(answer);
2119 return -1;
2120 }
2121 len -= NLMSG_LENGTH(sizeof(*r));
2122 if (len < 0) {
2123 fprintf(stderr, "Wrong len %d\n", len);
2124 free(answer);
2125 return -1;
2126 }
2127
2128 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2129
2130 if (tb[RTA_PREFSRC]) {
2131 tb[RTA_PREFSRC]->rta_type = RTA_SRC;
2132 r->rtm_src_len = 8*RTA_PAYLOAD(tb[RTA_PREFSRC]);
2133 } else if (!tb[RTA_SRC]) {
2134 fprintf(stderr, "Failed to connect the route\n");
2135 free(answer);
2136 return -1;
2137 }
2138 if (!odev && tb[RTA_OIF])
2139 tb[RTA_OIF]->rta_type = 0;
2140 if (tb[RTA_GATEWAY])
2141 tb[RTA_GATEWAY]->rta_type = 0;
2142 if (tb[RTA_VIA])
2143 tb[RTA_VIA]->rta_type = 0;
2144 if (!idev && tb[RTA_IIF])
2145 tb[RTA_IIF]->rta_type = 0;
2146 req.n.nlmsg_flags = NLM_F_REQUEST;
2147 req.n.nlmsg_type = RTM_GETROUTE;
2148
2149 delete_json_obj();
2150 free(answer);
2151 if (rtnl_talk(&rth, &req.n, &answer) < 0)
2152 return -2;
2153 }
2154
2155 if (print_route(answer, (void *)stdout) < 0) {
2156 fprintf(stderr, "An error :-)\n");
2157 free(answer);
2158 return -1;
2159 }
2160
2161 delete_json_obj();
2162 free(answer);
2163 return 0;
2164 }
2165
2166 static int rtattr_cmp(const struct rtattr *rta1, const struct rtattr *rta2)
2167 {
2168 if (!rta1 || !rta2 || rta1->rta_len != rta2->rta_len)
2169 return 1;
2170
2171 return memcmp(RTA_DATA(rta1), RTA_DATA(rta2), RTA_PAYLOAD(rta1));
2172 }
2173
2174 static int restore_handler(struct rtnl_ctrl_data *ctrl,
2175 struct nlmsghdr *n, void *arg)
2176 {
2177 struct rtmsg *r = NLMSG_DATA(n);
2178 struct rtattr *tb[RTA_MAX+1];
2179 int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
2180 int ret, prio = *(int *)arg;
2181
2182 parse_rtattr(tb, RTA_MAX, RTM_RTA(r), len);
2183
2184 /* Restore routes in correct order:
2185 * 0. ones for local addresses,
2186 * 1. ones for local networks,
2187 * 2. others (remote networks/hosts).
2188 */
2189 if (!prio && !tb[RTA_GATEWAY] && (!tb[RTA_PREFSRC] ||
2190 !rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST])))
2191 goto restore;
2192 else if (prio == 1 && !tb[RTA_GATEWAY] && tb[RTA_PREFSRC] &&
2193 rtattr_cmp(tb[RTA_PREFSRC], tb[RTA_DST]))
2194 goto restore;
2195 else if (prio == 2 && tb[RTA_GATEWAY])
2196 goto restore;
2197
2198 return 0;
2199
2200 restore:
2201 n->nlmsg_flags |= NLM_F_REQUEST | NLM_F_CREATE | NLM_F_ACK;
2202
2203 ll_init_map(&rth);
2204
2205 ret = rtnl_talk(&rth, n, NULL);
2206 if ((ret < 0) && (errno == EEXIST))
2207 ret = 0;
2208
2209 return ret;
2210 }
2211
2212 static int route_dump_check_magic(void)
2213 {
2214 int ret;
2215 __u32 magic = 0;
2216
2217 if (isatty(STDIN_FILENO)) {
2218 fprintf(stderr, "Can't restore route dump from a terminal\n");
2219 return -1;
2220 }
2221
2222 ret = fread(&magic, sizeof(magic), 1, stdin);
2223 if (magic != route_dump_magic) {
2224 fprintf(stderr, "Magic mismatch (%d elems, %x magic)\n", ret, magic);
2225 return -1;
2226 }
2227
2228 return 0;
2229 }
2230
2231 static int iproute_restore(void)
2232 {
2233 int pos, prio;
2234
2235 if (route_dump_check_magic())
2236 return -1;
2237
2238 pos = ftell(stdin);
2239 if (pos == -1) {
2240 perror("Failed to restore: ftell");
2241 return -1;
2242 }
2243
2244 for (prio = 0; prio < 3; prio++) {
2245 int err;
2246
2247 err = rtnl_from_file(stdin, &restore_handler, &prio);
2248 if (err)
2249 return -2;
2250
2251 if (fseek(stdin, pos, SEEK_SET) == -1) {
2252 perror("Failed to restore: fseek");
2253 return -1;
2254 }
2255 }
2256
2257 return 0;
2258 }
2259
2260 static int show_handler(struct rtnl_ctrl_data *ctrl,
2261 struct nlmsghdr *n, void *arg)
2262 {
2263 print_route(n, stdout);
2264 return 0;
2265 }
2266
2267 static int iproute_showdump(void)
2268 {
2269 if (route_dump_check_magic())
2270 return -1;
2271
2272 if (rtnl_from_file(stdin, &show_handler, NULL))
2273 return -2;
2274
2275 return 0;
2276 }
2277
2278 void iproute_reset_filter(int ifindex)
2279 {
2280 memset(&filter, 0, sizeof(filter));
2281 filter.mdst.bitlen = -1;
2282 filter.msrc.bitlen = -1;
2283 filter.oif = ifindex;
2284 if (filter.oif > 0)
2285 filter.oifmask = -1;
2286 }
2287
2288 int do_iproute(int argc, char **argv)
2289 {
2290 if (argc < 1)
2291 return iproute_list_flush_or_save(0, NULL, IPROUTE_LIST);
2292
2293 if (matches(*argv, "add") == 0)
2294 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_EXCL,
2295 argc-1, argv+1);
2296 if (matches(*argv, "change") == 0 || strcmp(*argv, "chg") == 0)
2297 return iproute_modify(RTM_NEWROUTE, NLM_F_REPLACE,
2298 argc-1, argv+1);
2299 if (matches(*argv, "replace") == 0)
2300 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_REPLACE,
2301 argc-1, argv+1);
2302 if (matches(*argv, "prepend") == 0)
2303 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE,
2304 argc-1, argv+1);
2305 if (matches(*argv, "append") == 0)
2306 return iproute_modify(RTM_NEWROUTE, NLM_F_CREATE|NLM_F_APPEND,
2307 argc-1, argv+1);
2308 if (matches(*argv, "test") == 0)
2309 return iproute_modify(RTM_NEWROUTE, NLM_F_EXCL,
2310 argc-1, argv+1);
2311 if (matches(*argv, "delete") == 0)
2312 return iproute_modify(RTM_DELROUTE, 0,
2313 argc-1, argv+1);
2314 if (matches(*argv, "list") == 0 || matches(*argv, "show") == 0
2315 || matches(*argv, "lst") == 0)
2316 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_LIST);
2317 if (matches(*argv, "get") == 0)
2318 return iproute_get(argc-1, argv+1);
2319 if (matches(*argv, "flush") == 0)
2320 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_FLUSH);
2321 if (matches(*argv, "save") == 0)
2322 return iproute_list_flush_or_save(argc-1, argv+1, IPROUTE_SAVE);
2323 if (matches(*argv, "restore") == 0)
2324 return iproute_restore();
2325 if (matches(*argv, "showdump") == 0)
2326 return iproute_showdump();
2327 if (matches(*argv, "help") == 0)
2328 usage();
2329
2330 fprintf(stderr,
2331 "Command \"%s\" is unknown, try \"ip route help\".\n", *argv);
2332 exit(-1);
2333 }
Upstream mirror of iproute2