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