2 * iproute.c "ip route".
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.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
21 #include <sys/socket.h>
22 #include <netinet/in.h>
23 #include <netinet/ip.h>
24 #include <arpa/inet.h>
25 #include <linux/in_route.h>
26 #include <linux/icmpv6.h>
31 #include "ip_common.h"
32 #include "iproute_lwtunnel.h"
35 #define RTAX_RTTVAR RTAX_HOPS
43 static const char *mx_names
[RTAX_MAX
+1] = {
45 [RTAX_WINDOW
] = "window",
47 [RTAX_RTTVAR
] = "rttvar",
48 [RTAX_SSTHRESH
] = "ssthresh",
50 [RTAX_ADVMSS
] = "advmss",
51 [RTAX_REORDERING
] = "reordering",
52 [RTAX_HOPLIMIT
] = "hoplimit",
53 [RTAX_INITCWND
] = "initcwnd",
54 [RTAX_FEATURES
] = "features",
55 [RTAX_RTO_MIN
] = "rto_min",
56 [RTAX_INITRWND
] = "initrwnd",
57 [RTAX_QUICKACK
] = "quickack",
58 [RTAX_CC_ALGO
] = "congctl",
60 static void usage(void) __attribute__((noreturn
));
62 static void usage(void)
64 fprintf(stderr
, "Usage: ip route { list | flush } SELECTOR\n");
65 fprintf(stderr
, " ip route save SELECTOR\n");
66 fprintf(stderr
, " ip route restore\n");
67 fprintf(stderr
, " ip route showdump\n");
68 fprintf(stderr
, " ip route get [ ROUTE_GET_FLAGS ] ADDRESS\n");
69 fprintf(stderr
, " [ from ADDRESS iif STRING ]\n");
70 fprintf(stderr
, " [ oif STRING ] [ tos TOS ]\n");
71 fprintf(stderr
, " [ mark NUMBER ] [ vrf NAME ]\n");
72 fprintf(stderr
, " [ uid NUMBER ]\n");
73 fprintf(stderr
, " ip route { add | del | change | append | replace } ROUTE\n");
74 fprintf(stderr
, "SELECTOR := [ root PREFIX ] [ match PREFIX ] [ exact PREFIX ]\n");
75 fprintf(stderr
, " [ table TABLE_ID ] [ vrf NAME ] [ proto RTPROTO ]\n");
76 fprintf(stderr
, " [ type TYPE ] [ scope SCOPE ]\n");
77 fprintf(stderr
, "ROUTE := NODE_SPEC [ INFO_SPEC ]\n");
78 fprintf(stderr
, "NODE_SPEC := [ TYPE ] PREFIX [ tos TOS ]\n");
79 fprintf(stderr
, " [ table TABLE_ID ] [ proto RTPROTO ]\n");
80 fprintf(stderr
, " [ scope SCOPE ] [ metric METRIC ]\n");
81 fprintf(stderr
, " [ ttl-propagate { enabled | disabled } ]\n");
82 fprintf(stderr
, "INFO_SPEC := NH OPTIONS FLAGS [ nexthop NH ]...\n");
83 fprintf(stderr
, "NH := [ encap ENCAPTYPE ENCAPHDR ] [ via [ FAMILY ] ADDRESS ]\n");
84 fprintf(stderr
, " [ dev STRING ] [ weight NUMBER ] NHFLAGS\n");
85 fprintf(stderr
, "FAMILY := [ inet | inet6 | ipx | dnet | mpls | bridge | link ]\n");
86 fprintf(stderr
, "OPTIONS := FLAGS [ mtu NUMBER ] [ advmss NUMBER ] [ as [ to ] ADDRESS ]\n");
87 fprintf(stderr
, " [ rtt TIME ] [ rttvar TIME ] [ reordering NUMBER ]\n");
88 fprintf(stderr
, " [ window NUMBER ] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n");
89 fprintf(stderr
, " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n");
90 fprintf(stderr
, " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n");
91 fprintf(stderr
, " [ features FEATURES ] [ quickack BOOL ] [ congctl NAME ]\n");
92 fprintf(stderr
, " [ pref PREF ] [ expires TIME ]\n");
93 fprintf(stderr
, "TYPE := { unicast | local | broadcast | multicast | throw |\n");
94 fprintf(stderr
, " unreachable | prohibit | blackhole | nat }\n");
95 fprintf(stderr
, "TABLE_ID := [ local | main | default | all | NUMBER ]\n");
96 fprintf(stderr
, "SCOPE := [ host | link | global | NUMBER ]\n");
97 fprintf(stderr
, "NHFLAGS := [ onlink | pervasive ]\n");
98 fprintf(stderr
, "RTPROTO := [ kernel | boot | static | NUMBER ]\n");
99 fprintf(stderr
, "PREF := [ low | medium | high ]\n");
100 fprintf(stderr
, "TIME := NUMBER[s|ms]\n");
101 fprintf(stderr
, "BOOL := [1|0]\n");
102 fprintf(stderr
, "FEATURES := ecn\n");
103 fprintf(stderr
, "ENCAPTYPE := [ mpls | ip | ip6 | seg6 ]\n");
104 fprintf(stderr
, "ENCAPHDR := [ MPLSLABEL | SEG6HDR ]\n");
105 fprintf(stderr
, "SEG6HDR := [ mode SEGMODE ] segs ADDR1,ADDRi,ADDRn [hmac HMACKEYID] [cleanup]\n");
106 fprintf(stderr
, "SEGMODE := [ encap | inline ]\n");
107 fprintf(stderr
, "ROUTE_GET_FLAGS := [ fibmatch ]\n");
120 int protocol
, protocolmask
;
121 int scope
, scopemask
;
127 int realm
, realmmask
;
128 inet_prefix rprefsrc
;
136 static int flush_update(void)
138 if (rtnl_send_check(&rth
, filter
.flushb
, filter
.flushp
) < 0) {
139 perror("Failed to send flush request");
146 static int filter_nlmsg(struct nlmsghdr
*n
, struct rtattr
**tb
, int host_len
)
148 struct rtmsg
*r
= NLMSG_DATA(n
);
149 inet_prefix dst
= { .family
= r
->rtm_family
};
150 inet_prefix src
= { .family
= r
->rtm_family
};
151 inet_prefix via
= { .family
= r
->rtm_family
};
152 inet_prefix prefsrc
= { .family
= r
->rtm_family
};
154 static int ip6_multiple_tables
;
156 table
= rtm_get_table(r
, tb
);
158 if (preferred_family
!= AF_UNSPEC
&& r
->rtm_family
!= preferred_family
)
161 if (r
->rtm_family
== AF_INET6
&& table
!= RT_TABLE_MAIN
)
162 ip6_multiple_tables
= 1;
164 if (filter
.cloned
== !(r
->rtm_flags
&RTM_F_CLONED
))
167 if (r
->rtm_family
== AF_INET6
&& !ip6_multiple_tables
) {
169 if (filter
.tb
== RT_TABLE_LOCAL
) {
170 if (r
->rtm_type
!= RTN_LOCAL
)
172 } else if (filter
.tb
== RT_TABLE_MAIN
) {
173 if (r
->rtm_type
== RTN_LOCAL
)
180 if (filter
.tb
> 0 && filter
.tb
!= table
)
183 if ((filter
.protocol
^r
->rtm_protocol
)&filter
.protocolmask
)
185 if ((filter
.scope
^r
->rtm_scope
)&filter
.scopemask
)
188 if (filter
.typemask
&& !(filter
.typemask
& (1 << r
->rtm_type
)))
190 if ((filter
.tos
^r
->rtm_tos
)&filter
.tosmask
)
192 if (filter
.rdst
.family
&&
193 (r
->rtm_family
!= filter
.rdst
.family
|| filter
.rdst
.bitlen
> r
->rtm_dst_len
))
195 if (filter
.mdst
.family
&&
196 (r
->rtm_family
!= filter
.mdst
.family
||
197 (filter
.mdst
.bitlen
>= 0 && filter
.mdst
.bitlen
< r
->rtm_dst_len
)))
199 if (filter
.rsrc
.family
&&
200 (r
->rtm_family
!= filter
.rsrc
.family
|| filter
.rsrc
.bitlen
> r
->rtm_src_len
))
202 if (filter
.msrc
.family
&&
203 (r
->rtm_family
!= filter
.msrc
.family
||
204 (filter
.msrc
.bitlen
>= 0 && filter
.msrc
.bitlen
< r
->rtm_src_len
)))
206 if (filter
.rvia
.family
) {
207 int family
= r
->rtm_family
;
210 struct rtvia
*via
= RTA_DATA(tb
[RTA_VIA
]);
212 family
= via
->rtvia_family
;
214 if (family
!= filter
.rvia
.family
)
217 if (filter
.rprefsrc
.family
&& r
->rtm_family
!= filter
.rprefsrc
.family
)
221 memcpy(&dst
.data
, RTA_DATA(tb
[RTA_DST
]), (r
->rtm_dst_len
+7)/8);
222 if (filter
.rsrc
.family
|| filter
.msrc
.family
) {
224 memcpy(&src
.data
, RTA_DATA(tb
[RTA_SRC
]), (r
->rtm_src_len
+7)/8);
226 if (filter
.rvia
.bitlen
> 0) {
228 memcpy(&via
.data
, RTA_DATA(tb
[RTA_GATEWAY
]), host_len
/8);
230 size_t len
= RTA_PAYLOAD(tb
[RTA_VIA
]) - 2;
231 struct rtvia
*rtvia
= RTA_DATA(tb
[RTA_VIA
]);
233 via
.family
= rtvia
->rtvia_family
;
234 memcpy(&via
.data
, rtvia
->rtvia_addr
, len
);
237 if (filter
.rprefsrc
.bitlen
> 0) {
239 memcpy(&prefsrc
.data
, RTA_DATA(tb
[RTA_PREFSRC
]), host_len
/8);
242 if (filter
.rdst
.family
&& inet_addr_match(&dst
, &filter
.rdst
, filter
.rdst
.bitlen
))
244 if (filter
.mdst
.family
&& filter
.mdst
.bitlen
>= 0 &&
245 inet_addr_match(&dst
, &filter
.mdst
, r
->rtm_dst_len
))
248 if (filter
.rsrc
.family
&& inet_addr_match(&src
, &filter
.rsrc
, filter
.rsrc
.bitlen
))
250 if (filter
.msrc
.family
&& filter
.msrc
.bitlen
>= 0 &&
251 inet_addr_match(&src
, &filter
.msrc
, r
->rtm_src_len
))
254 if (filter
.rvia
.family
&& inet_addr_match(&via
, &filter
.rvia
, filter
.rvia
.bitlen
))
256 if (filter
.rprefsrc
.family
&& inet_addr_match(&prefsrc
, &filter
.rprefsrc
, filter
.rprefsrc
.bitlen
))
258 if (filter
.realmmask
) {
262 realms
= rta_getattr_u32(tb
[RTA_FLOW
]);
263 if ((realms
^filter
.realm
)&filter
.realmmask
)
266 if (filter
.iifmask
) {
270 iif
= rta_getattr_u32(tb
[RTA_IIF
]);
271 if ((iif
^filter
.iif
)&filter
.iifmask
)
274 if (filter
.oifmask
) {
278 oif
= rta_getattr_u32(tb
[RTA_OIF
]);
279 if ((oif
^filter
.oif
)&filter
.oifmask
)
282 if (filter
.markmask
) {
286 mark
= rta_getattr_u32(tb
[RTA_MARK
]);
287 if ((mark
^ filter
.mark
) & filter
.markmask
)
291 r
->rtm_family
== AF_INET6
&&
292 r
->rtm_dst_len
== 0 &&
293 r
->rtm_type
== RTN_UNREACHABLE
&&
295 rta_getattr_u32(tb
[RTA_PRIORITY
]) == -1)
301 static void print_rtax_features(FILE *fp
, unsigned int features
)
303 unsigned int of
= features
;
305 if (features
& RTAX_FEATURE_ECN
) {
307 features
&= ~RTAX_FEATURE_ECN
;
311 fprintf(fp
, "0x%x ", of
);
314 int print_route(const struct sockaddr_nl
*who
, struct nlmsghdr
*n
, void *arg
)
316 FILE *fp
= (FILE *)arg
;
317 struct rtmsg
*r
= NLMSG_DATA(n
);
318 int len
= n
->nlmsg_len
;
319 struct rtattr
*tb
[RTA_MAX
+1];
320 int host_len
, family
;
326 if (n
->nlmsg_type
!= RTM_NEWROUTE
&& n
->nlmsg_type
!= RTM_DELROUTE
) {
327 fprintf(stderr
, "Not a route: %08x %08x %08x\n",
328 n
->nlmsg_len
, n
->nlmsg_type
, n
->nlmsg_flags
);
331 if (filter
.flushb
&& n
->nlmsg_type
!= RTM_NEWROUTE
)
333 len
-= NLMSG_LENGTH(sizeof(*r
));
335 fprintf(stderr
, "BUG: wrong nlmsg len %d\n", len
);
339 host_len
= af_bit_len(r
->rtm_family
);
341 parse_rtattr(tb
, RTA_MAX
, RTM_RTA(r
), len
);
342 table
= rtm_get_table(r
, tb
);
344 if (!filter_nlmsg(n
, tb
, host_len
))
350 if (NLMSG_ALIGN(filter
.flushp
) + n
->nlmsg_len
> filter
.flushe
) {
354 fn
= (struct nlmsghdr
*)(filter
.flushb
+ NLMSG_ALIGN(filter
.flushp
));
355 memcpy(fn
, n
, n
->nlmsg_len
);
356 fn
->nlmsg_type
= RTM_DELROUTE
;
357 fn
->nlmsg_flags
= NLM_F_REQUEST
;
358 fn
->nlmsg_seq
= ++rth
.seq
;
359 filter
.flushp
= (((char *)fn
) + n
->nlmsg_len
) - filter
.flushb
;
365 if (n
->nlmsg_type
== RTM_DELROUTE
)
366 fprintf(fp
, "Deleted ");
367 if ((r
->rtm_type
!= RTN_UNICAST
|| show_details
> 0) &&
368 (!filter
.typemask
|| (filter
.typemask
& (1 << r
->rtm_type
))))
369 fprintf(fp
, "%s ", rtnl_rtntype_n2a(r
->rtm_type
, b1
, sizeof(b1
)));
372 family
= get_real_family(r
->rtm_type
, r
->rtm_family
);
373 if (r
->rtm_dst_len
!= host_len
) {
374 fprintf(fp
, "%s/%u ",
375 rt_addr_n2a_rta(family
, tb
[RTA_DST
]),
379 format_host_rta(family
, tb
[RTA_DST
]));
381 } else if (r
->rtm_dst_len
) {
382 fprintf(fp
, "0/%d ", r
->rtm_dst_len
);
384 fprintf(fp
, "default ");
387 family
= get_real_family(r
->rtm_type
, r
->rtm_family
);
388 if (r
->rtm_src_len
!= host_len
) {
389 fprintf(fp
, "from %s/%u ",
390 rt_addr_n2a_rta(family
, tb
[RTA_SRC
]),
393 fprintf(fp
, "from %s ",
394 format_host_rta(family
, tb
[RTA_SRC
]));
396 } else if (r
->rtm_src_len
) {
397 fprintf(fp
, "from 0/%u ", r
->rtm_src_len
);
399 if (tb
[RTA_NEWDST
]) {
400 fprintf(fp
, "as to %s ",
401 format_host_rta(r
->rtm_family
, tb
[RTA_NEWDST
]));
405 lwt_print_encap(fp
, tb
[RTA_ENCAP_TYPE
], tb
[RTA_ENCAP
]);
407 if (r
->rtm_tos
&& filter
.tosmask
!= -1) {
409 fprintf(fp
, "tos %s ", rtnl_dsfield_n2a(r
->rtm_tos
, b1
, sizeof(b1
)));
412 if (tb
[RTA_GATEWAY
] && filter
.rvia
.bitlen
!= host_len
) {
413 fprintf(fp
, "via %s ",
414 format_host_rta(r
->rtm_family
, tb
[RTA_GATEWAY
]));
417 size_t len
= RTA_PAYLOAD(tb
[RTA_VIA
]) - 2;
418 struct rtvia
*via
= RTA_DATA(tb
[RTA_VIA
]);
420 fprintf(fp
, "via %s %s ",
421 family_name(via
->rtvia_family
),
422 format_host(via
->rtvia_family
, len
, via
->rtvia_addr
));
424 if (tb
[RTA_OIF
] && filter
.oifmask
!= -1)
425 fprintf(fp
, "dev %s ", ll_index_to_name(rta_getattr_u32(tb
[RTA_OIF
])));
427 if (table
&& (table
!= RT_TABLE_MAIN
|| show_details
> 0) && !filter
.tb
)
428 fprintf(fp
, "table %s ", rtnl_rttable_n2a(table
, b1
, sizeof(b1
)));
429 if (!(r
->rtm_flags
&RTM_F_CLONED
)) {
430 if ((r
->rtm_protocol
!= RTPROT_BOOT
|| show_details
> 0) && filter
.protocolmask
!= -1)
431 fprintf(fp
, "proto %s ", rtnl_rtprot_n2a(r
->rtm_protocol
, b1
, sizeof(b1
)));
432 if ((r
->rtm_scope
!= RT_SCOPE_UNIVERSE
|| show_details
> 0) && filter
.scopemask
!= -1)
433 fprintf(fp
, "scope %s ", rtnl_rtscope_n2a(r
->rtm_scope
, b1
, sizeof(b1
)));
435 if (tb
[RTA_PREFSRC
] && filter
.rprefsrc
.bitlen
!= host_len
) {
436 /* Do not use format_host(). It is our local addr
437 and symbolic name will not be useful.
439 fprintf(fp
, "src %s ",
440 rt_addr_n2a_rta(r
->rtm_family
, tb
[RTA_PREFSRC
]));
442 if (tb
[RTA_PRIORITY
])
443 fprintf(fp
, "metric %u ", rta_getattr_u32(tb
[RTA_PRIORITY
]));
444 if (r
->rtm_flags
& RTNH_F_DEAD
)
445 fprintf(fp
, "dead ");
446 if (r
->rtm_flags
& RTNH_F_ONLINK
)
447 fprintf(fp
, "onlink ");
448 if (r
->rtm_flags
& RTNH_F_PERVASIVE
)
449 fprintf(fp
, "pervasive ");
450 if (r
->rtm_flags
& RTNH_F_OFFLOAD
)
451 fprintf(fp
, "offload ");
452 if (r
->rtm_flags
& RTM_F_NOTIFY
)
453 fprintf(fp
, "notify ");
454 if (r
->rtm_flags
& RTNH_F_LINKDOWN
)
455 fprintf(fp
, "linkdown ");
456 if (r
->rtm_flags
& RTNH_F_UNRESOLVED
)
457 fprintf(fp
, "unresolved ");
459 unsigned int mark
= rta_getattr_u32(tb
[RTA_MARK
]);
463 fprintf(fp
, "mark 0x%x ", mark
);
465 fprintf(fp
, "mark %u ", mark
);
469 if (tb
[RTA_FLOW
] && filter
.realmmask
!= ~0U) {
470 __u32 to
= rta_getattr_u32(tb
[RTA_FLOW
]);
474 fprintf(fp
, "realm%s ", from
? "s" : "");
477 rtnl_rtrealm_n2a(from
, b1
, sizeof(b1
)));
480 rtnl_rtrealm_n2a(to
, b1
, sizeof(b1
)));
484 fprintf(fp
, "uid %u ", rta_getattr_u32(tb
[RTA_UID
]));
486 if ((r
->rtm_flags
&RTM_F_CLONED
) && r
->rtm_family
== AF_INET
) {
487 __u32 flags
= r
->rtm_flags
&~0xFFFF;
490 fprintf(fp
, "%s cache ", _SL_
);
492 #define PRTFL(fl, flname) if (flags&RTCF_##fl) { \
493 flags &= ~RTCF_##fl; \
494 fprintf(fp, "%s" flname "%s", first ? "<" : "", flags ? "," : "> "); \
496 PRTFL(LOCAL
, "local");
497 PRTFL(REJECT
, "reject");
498 PRTFL(MULTICAST
, "mc");
499 PRTFL(BROADCAST
, "brd");
500 PRTFL(DNAT
, "dst-nat");
501 PRTFL(SNAT
, "src-nat");
503 PRTFL(DIRECTDST
, "dst-direct");
504 PRTFL(DIRECTSRC
, "src-direct");
505 PRTFL(REDIRECTED
, "redirected");
506 PRTFL(DOREDIRECT
, "redirect");
507 PRTFL(FAST
, "fastroute");
508 PRTFL(NOTIFY
, "notify");
509 PRTFL(TPROXY
, "proxy");
512 fprintf(fp
, "%s%x> ", first
? "<" : "", flags
);
513 if (tb
[RTA_CACHEINFO
]) {
514 struct rta_cacheinfo
*ci
= RTA_DATA(tb
[RTA_CACHEINFO
]);
518 if (ci
->rta_expires
!= 0)
519 fprintf(fp
, "expires %dsec ", ci
->rta_expires
/hz
);
520 if (ci
->rta_error
!= 0)
521 fprintf(fp
, "error %d ", ci
->rta_error
);
524 fprintf(fp
, "users %d ", ci
->rta_clntref
);
525 if (ci
->rta_used
!= 0)
526 fprintf(fp
, "used %d ", ci
->rta_used
);
527 if (ci
->rta_lastuse
!= 0)
528 fprintf(fp
, "age %dsec ", ci
->rta_lastuse
/hz
);
531 fprintf(fp
, "ipid 0x%04x ", ci
->rta_id
);
532 if (ci
->rta_ts
|| ci
->rta_tsage
)
533 fprintf(fp
, "ts 0x%x tsage %dsec ",
534 ci
->rta_ts
, ci
->rta_tsage
);
536 } else if (r
->rtm_family
== AF_INET6
) {
537 struct rta_cacheinfo
*ci
= NULL
;
539 if (tb
[RTA_CACHEINFO
])
540 ci
= RTA_DATA(tb
[RTA_CACHEINFO
]);
541 if ((r
->rtm_flags
& RTM_F_CLONED
) || (ci
&& ci
->rta_expires
)) {
544 if (r
->rtm_flags
& RTM_F_CLONED
)
545 fprintf(fp
, "%s cache ", _SL_
);
547 fprintf(fp
, "expires %dsec ", ci
->rta_expires
/hz
);
548 if (ci
->rta_error
!= 0)
549 fprintf(fp
, "error %d ", ci
->rta_error
);
552 fprintf(fp
, "users %d ", ci
->rta_clntref
);
553 if (ci
->rta_used
!= 0)
554 fprintf(fp
, "used %d ", ci
->rta_used
);
555 if (ci
->rta_lastuse
!= 0)
556 fprintf(fp
, "age %dsec ", ci
->rta_lastuse
/hz
);
559 if (ci
->rta_error
!= 0)
560 fprintf(fp
, "error %d ", ci
->rta_error
);
563 if (tb
[RTA_METRICS
]) {
565 unsigned int mxlock
= 0;
566 struct rtattr
*mxrta
[RTAX_MAX
+1];
568 parse_rtattr(mxrta
, RTAX_MAX
, RTA_DATA(tb
[RTA_METRICS
]),
569 RTA_PAYLOAD(tb
[RTA_METRICS
]));
570 if (mxrta
[RTAX_LOCK
])
571 mxlock
= rta_getattr_u32(mxrta
[RTAX_LOCK
]);
573 for (i
= 2; i
<= RTAX_MAX
; i
++) {
576 if (mxrta
[i
] == NULL
)
579 if (i
!= RTAX_CC_ALGO
)
580 val
= rta_getattr_u32(mxrta
[i
]);
582 if (i
== RTAX_HOPLIMIT
&& (int)val
== -1)
585 if (i
< sizeof(mx_names
)/sizeof(char *) && mx_names
[i
])
586 fprintf(fp
, "%s ", mx_names
[i
]);
588 fprintf(fp
, "metric %d ", i
);
591 fprintf(fp
, "lock ");
595 print_rtax_features(fp
, val
);
598 fprintf(fp
, "%u ", val
);
606 else if (i
== RTAX_RTTVAR
)
610 fprintf(fp
, "%gs ", val
/1e3
);
612 fprintf(fp
, "%ums ", val
);
615 fprintf(fp
, "%s ", rta_getattr_str(mxrta
[i
]));
620 if (tb
[RTA_IIF
] && filter
.iifmask
!= -1) {
621 fprintf(fp
, "iif %s ",
622 ll_index_to_name(rta_getattr_u32(tb
[RTA_IIF
])));
624 if (tb
[RTA_MULTIPATH
]) {
625 struct rtnexthop
*nh
= RTA_DATA(tb
[RTA_MULTIPATH
]);
628 len
= RTA_PAYLOAD(tb
[RTA_MULTIPATH
]);
631 if (len
< sizeof(*nh
))
633 if (nh
->rtnh_len
> len
)
635 if (r
->rtm_flags
&RTM_F_CLONED
&& r
->rtm_type
== RTN_MULTICAST
) {
637 fprintf(fp
, "Oifs: ");
641 fprintf(fp
, "%s\tnexthop ", _SL_
);
642 if (nh
->rtnh_len
> sizeof(*nh
)) {
643 parse_rtattr(tb
, RTA_MAX
, RTNH_DATA(nh
), nh
->rtnh_len
- sizeof(*nh
));
649 if (tb
[RTA_NEWDST
]) {
650 fprintf(fp
, "as to %s ",
651 format_host_rta(r
->rtm_family
,
654 if (tb
[RTA_GATEWAY
]) {
655 fprintf(fp
, "via %s ",
656 format_host_rta(r
->rtm_family
,
660 size_t len
= RTA_PAYLOAD(tb
[RTA_VIA
]) - 2;
661 struct rtvia
*via
= RTA_DATA(tb
[RTA_VIA
]);
663 fprintf(fp
, "via %s %s ",
664 family_name(via
->rtvia_family
),
665 format_host(via
->rtvia_family
, len
, via
->rtvia_addr
));
668 __u32 to
= rta_getattr_u32(tb
[RTA_FLOW
]);
672 fprintf(fp
, "realm%s ", from
? "s" : "");
675 rtnl_rtrealm_n2a(from
, b1
, sizeof(b1
)));
678 rtnl_rtrealm_n2a(to
, b1
, sizeof(b1
)));
681 if (r
->rtm_flags
&RTM_F_CLONED
&& r
->rtm_type
== RTN_MULTICAST
) {
682 fprintf(fp
, "%s", ll_index_to_name(nh
->rtnh_ifindex
));
683 if (nh
->rtnh_hops
!= 1)
684 fprintf(fp
, "(ttl>%d)", nh
->rtnh_hops
);
687 fprintf(fp
, "dev %s ", ll_index_to_name(nh
->rtnh_ifindex
));
688 if (r
->rtm_family
!= AF_MPLS
)
689 fprintf(fp
, "weight %d ",
692 if (nh
->rtnh_flags
& RTNH_F_DEAD
)
693 fprintf(fp
, "dead ");
694 if (nh
->rtnh_flags
& RTNH_F_ONLINK
)
695 fprintf(fp
, "onlink ");
696 if (nh
->rtnh_flags
& RTNH_F_PERVASIVE
)
697 fprintf(fp
, "pervasive ");
698 if (nh
->rtnh_flags
& RTNH_F_LINKDOWN
)
699 fprintf(fp
, "linkdown ");
700 len
-= NLMSG_ALIGN(nh
->rtnh_len
);
705 unsigned int pref
= rta_getattr_u8(tb
[RTA_PREF
]);
707 fprintf(fp
, "pref ");
710 case ICMPV6_ROUTER_PREF_LOW
:
713 case ICMPV6_ROUTER_PREF_MEDIUM
:
714 fprintf(fp
, "medium");
716 case ICMPV6_ROUTER_PREF_HIGH
:
720 fprintf(fp
, "%u", pref
);
723 if (tb
[RTA_TTL_PROPAGATE
]) {
724 fprintf(fp
, "ttl-propagate ");
725 if (rta_getattr_u8(tb
[RTA_TTL_PROPAGATE
]))
726 fprintf(fp
, "enabled");
728 fprintf(fp
, "disabled");
735 static int parse_one_nh(struct nlmsghdr
*n
, struct rtmsg
*r
,
736 struct rtattr
*rta
, struct rtnexthop
*rtnh
,
737 int *argcp
, char ***argvp
)
740 char **argv
= *argvp
;
742 while (++argv
, --argc
> 0) {
743 if (strcmp(*argv
, "via") == 0) {
748 family
= read_family(*argv
);
749 if (family
== AF_UNSPEC
)
750 family
= r
->rtm_family
;
753 get_addr(&addr
, *argv
, family
);
754 if (r
->rtm_family
== AF_UNSPEC
)
755 r
->rtm_family
= addr
.family
;
756 if (addr
.family
== r
->rtm_family
) {
757 rta_addattr_l(rta
, 4096, RTA_GATEWAY
, &addr
.data
, addr
.bytelen
);
758 rtnh
->rtnh_len
+= sizeof(struct rtattr
) + addr
.bytelen
;
760 rta_addattr_l(rta
, 4096, RTA_VIA
, &addr
.family
, addr
.bytelen
+2);
761 rtnh
->rtnh_len
+= RTA_SPACE(addr
.bytelen
+2);
763 } else if (strcmp(*argv
, "dev") == 0) {
765 if ((rtnh
->rtnh_ifindex
= ll_name_to_index(*argv
)) == 0) {
766 fprintf(stderr
, "Cannot find device \"%s\"\n", *argv
);
769 } else if (strcmp(*argv
, "weight") == 0) {
773 if (get_unsigned(&w
, *argv
, 0) || w
== 0 || w
> 256)
774 invarg("\"weight\" is invalid\n", *argv
);
775 rtnh
->rtnh_hops
= w
- 1;
776 } else if (strcmp(*argv
, "onlink") == 0) {
777 rtnh
->rtnh_flags
|= RTNH_F_ONLINK
;
778 } else if (matches(*argv
, "realms") == 0) {
782 if (get_rt_realms_or_raw(&realm
, *argv
))
783 invarg("\"realm\" value is invalid\n", *argv
);
784 rta_addattr32(rta
, 4096, RTA_FLOW
, realm
);
785 rtnh
->rtnh_len
+= sizeof(struct rtattr
) + 4;
786 } else if (strcmp(*argv
, "encap") == 0) {
787 int len
= rta
->rta_len
;
789 lwt_parse_encap(rta
, 4096, &argc
, &argv
);
790 rtnh
->rtnh_len
+= rta
->rta_len
- len
;
791 } else if (strcmp(*argv
, "as") == 0) {
795 if (strcmp(*argv
, "to") == 0)
797 get_addr(&addr
, *argv
, r
->rtm_family
);
798 rta_addattr_l(rta
, 4096, RTA_NEWDST
, &addr
.data
,
800 rtnh
->rtnh_len
+= sizeof(struct rtattr
) + addr
.bytelen
;
809 static int parse_nexthops(struct nlmsghdr
*n
, struct rtmsg
*r
,
810 int argc
, char **argv
)
813 struct rtattr
*rta
= (void *)buf
;
814 struct rtnexthop
*rtnh
;
816 rta
->rta_type
= RTA_MULTIPATH
;
817 rta
->rta_len
= RTA_LENGTH(0);
818 rtnh
= RTA_DATA(rta
);
821 if (strcmp(*argv
, "nexthop") != 0) {
822 fprintf(stderr
, "Error: \"nexthop\" or end of line is expected instead of \"%s\"\n", *argv
);
826 fprintf(stderr
, "Error: unexpected end of line after \"nexthop\"\n");
829 memset(rtnh
, 0, sizeof(*rtnh
));
830 rtnh
->rtnh_len
= sizeof(*rtnh
);
831 rta
->rta_len
+= rtnh
->rtnh_len
;
832 parse_one_nh(n
, r
, rta
, rtnh
, &argc
, &argv
);
833 rtnh
= RTNH_NEXT(rtnh
);
836 if (rta
->rta_len
> RTA_LENGTH(0))
837 addattr_l(n
, 1024, RTA_MULTIPATH
, RTA_DATA(rta
), RTA_PAYLOAD(rta
));
841 static int iproute_modify(int cmd
, unsigned int flags
, int argc
, char **argv
)
848 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct rtmsg
)),
849 .n
.nlmsg_flags
= NLM_F_REQUEST
| flags
,
851 .r
.rtm_family
= preferred_family
,
852 .r
.rtm_table
= RT_TABLE_MAIN
,
853 .r
.rtm_scope
= RT_SCOPE_NOWHERE
,
856 struct rtattr
*mxrta
= (void *)mxbuf
;
857 unsigned int mxlock
= 0;
867 if (cmd
!= RTM_DELROUTE
) {
868 req
.r
.rtm_protocol
= RTPROT_BOOT
;
869 req
.r
.rtm_scope
= RT_SCOPE_UNIVERSE
;
870 req
.r
.rtm_type
= RTN_UNICAST
;
873 mxrta
->rta_type
= RTA_METRICS
;
874 mxrta
->rta_len
= RTA_LENGTH(0);
877 if (strcmp(*argv
, "src") == 0) {
881 get_addr(&addr
, *argv
, req
.r
.rtm_family
);
882 if (req
.r
.rtm_family
== AF_UNSPEC
)
883 req
.r
.rtm_family
= addr
.family
;
884 addattr_l(&req
.n
, sizeof(req
), RTA_PREFSRC
, &addr
.data
, addr
.bytelen
);
885 } else if (strcmp(*argv
, "as") == 0) {
889 if (strcmp(*argv
, "to") == 0) {
892 get_addr(&addr
, *argv
, req
.r
.rtm_family
);
893 if (req
.r
.rtm_family
== AF_UNSPEC
)
894 req
.r
.rtm_family
= addr
.family
;
895 addattr_l(&req
.n
, sizeof(req
), RTA_NEWDST
, &addr
.data
, addr
.bytelen
);
896 } else if (strcmp(*argv
, "via") == 0) {
901 invarg("use nexthop syntax to specify multiple via\n",
906 family
= read_family(*argv
);
907 if (family
== AF_UNSPEC
)
908 family
= req
.r
.rtm_family
;
911 get_addr(&addr
, *argv
, family
);
912 if (req
.r
.rtm_family
== AF_UNSPEC
)
913 req
.r
.rtm_family
= addr
.family
;
914 if (addr
.family
== req
.r
.rtm_family
)
915 addattr_l(&req
.n
, sizeof(req
), RTA_GATEWAY
,
916 &addr
.data
, addr
.bytelen
);
918 addattr_l(&req
.n
, sizeof(req
), RTA_VIA
,
919 &addr
.family
, addr
.bytelen
+2);
920 } else if (strcmp(*argv
, "from") == 0) {
924 get_prefix(&addr
, *argv
, req
.r
.rtm_family
);
925 if (req
.r
.rtm_family
== AF_UNSPEC
)
926 req
.r
.rtm_family
= addr
.family
;
928 addattr_l(&req
.n
, sizeof(req
), RTA_SRC
, &addr
.data
, addr
.bytelen
);
929 req
.r
.rtm_src_len
= addr
.bitlen
;
930 } else if (strcmp(*argv
, "tos") == 0 ||
931 matches(*argv
, "dsfield") == 0) {
935 if (rtnl_dsfield_a2n(&tos
, *argv
))
936 invarg("\"tos\" value is invalid\n", *argv
);
938 } else if (strcmp(*argv
, "expires") == 0) {
942 if (get_u32(&expires
, *argv
, 0))
943 invarg("\"expires\" value is invalid\n", *argv
);
944 addattr32(&req
.n
, sizeof(req
), RTA_EXPIRES
, expires
);
945 } else if (matches(*argv
, "metric") == 0 ||
946 matches(*argv
, "priority") == 0 ||
947 strcmp(*argv
, "preference") == 0) {
951 if (get_u32(&metric
, *argv
, 0))
952 invarg("\"metric\" value is invalid\n", *argv
);
953 addattr32(&req
.n
, sizeof(req
), RTA_PRIORITY
, metric
);
954 } else if (strcmp(*argv
, "scope") == 0) {
958 if (rtnl_rtscope_a2n(&scope
, *argv
))
959 invarg("invalid \"scope\" value\n", *argv
);
960 req
.r
.rtm_scope
= scope
;
962 } else if (strcmp(*argv
, "mtu") == 0) {
966 if (strcmp(*argv
, "lock") == 0) {
967 mxlock
|= (1<<RTAX_MTU
);
970 if (get_unsigned(&mtu
, *argv
, 0))
971 invarg("\"mtu\" value is invalid\n", *argv
);
972 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_MTU
, mtu
);
973 } else if (strcmp(*argv
, "hoplimit") == 0) {
974 unsigned int hoplimit
;
977 if (strcmp(*argv
, "lock") == 0) {
978 mxlock
|= (1<<RTAX_HOPLIMIT
);
981 if (get_unsigned(&hoplimit
, *argv
, 0) || hoplimit
> 255)
982 invarg("\"hoplimit\" value is invalid\n", *argv
);
983 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_HOPLIMIT
, hoplimit
);
984 } else if (strcmp(*argv
, "advmss") == 0) {
988 if (strcmp(*argv
, "lock") == 0) {
989 mxlock
|= (1<<RTAX_ADVMSS
);
992 if (get_unsigned(&mss
, *argv
, 0))
993 invarg("\"mss\" value is invalid\n", *argv
);
994 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_ADVMSS
, mss
);
995 } else if (matches(*argv
, "reordering") == 0) {
999 if (strcmp(*argv
, "lock") == 0) {
1000 mxlock
|= (1<<RTAX_REORDERING
);
1003 if (get_unsigned(&reord
, *argv
, 0))
1004 invarg("\"reordering\" value is invalid\n", *argv
);
1005 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_REORDERING
, reord
);
1006 } else if (strcmp(*argv
, "rtt") == 0) {
1010 if (strcmp(*argv
, "lock") == 0) {
1011 mxlock
|= (1<<RTAX_RTT
);
1014 if (get_time_rtt(&rtt
, *argv
, &raw
))
1015 invarg("\"rtt\" value is invalid\n", *argv
);
1016 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_RTT
,
1017 (raw
) ? rtt
: rtt
* 8);
1018 } else if (strcmp(*argv
, "rto_min") == 0) {
1019 unsigned int rto_min
;
1022 mxlock
|= (1<<RTAX_RTO_MIN
);
1023 if (get_time_rtt(&rto_min
, *argv
, &raw
))
1024 invarg("\"rto_min\" value is invalid\n",
1026 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_RTO_MIN
,
1028 } else if (matches(*argv
, "window") == 0) {
1032 if (strcmp(*argv
, "lock") == 0) {
1033 mxlock
|= (1<<RTAX_WINDOW
);
1036 if (get_unsigned(&win
, *argv
, 0))
1037 invarg("\"window\" value is invalid\n", *argv
);
1038 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_WINDOW
, win
);
1039 } else if (matches(*argv
, "cwnd") == 0) {
1043 if (strcmp(*argv
, "lock") == 0) {
1044 mxlock
|= (1<<RTAX_CWND
);
1047 if (get_unsigned(&win
, *argv
, 0))
1048 invarg("\"cwnd\" value is invalid\n", *argv
);
1049 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_CWND
, win
);
1050 } else if (matches(*argv
, "initcwnd") == 0) {
1054 if (strcmp(*argv
, "lock") == 0) {
1055 mxlock
|= (1<<RTAX_INITCWND
);
1058 if (get_unsigned(&win
, *argv
, 0))
1059 invarg("\"initcwnd\" value is invalid\n", *argv
);
1060 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_INITCWND
, win
);
1061 } else if (matches(*argv
, "initrwnd") == 0) {
1065 if (strcmp(*argv
, "lock") == 0) {
1066 mxlock
|= (1<<RTAX_INITRWND
);
1069 if (get_unsigned(&win
, *argv
, 0))
1070 invarg("\"initrwnd\" value is invalid\n", *argv
);
1071 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_INITRWND
, win
);
1072 } else if (matches(*argv
, "features") == 0) {
1073 unsigned int features
= 0;
1078 if (strcmp(*argv
, "ecn") == 0)
1079 features
|= RTAX_FEATURE_ECN
;
1081 invarg("\"features\" value not valid\n", *argv
);
1085 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_FEATURES
, features
);
1086 } else if (matches(*argv
, "quickack") == 0) {
1087 unsigned int quickack
;
1090 if (get_unsigned(&quickack
, *argv
, 0))
1091 invarg("\"quickack\" value is invalid\n", *argv
);
1092 if (quickack
!= 1 && quickack
!= 0)
1093 invarg("\"quickack\" value should be 0 or 1\n", *argv
);
1094 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_QUICKACK
, quickack
);
1095 } else if (matches(*argv
, "congctl") == 0) {
1097 if (strcmp(*argv
, "lock") == 0) {
1098 mxlock
|= 1 << RTAX_CC_ALGO
;
1101 rta_addattr_l(mxrta
, sizeof(mxbuf
), RTAX_CC_ALGO
, *argv
,
1103 } else if (matches(*argv
, "rttvar") == 0) {
1107 if (strcmp(*argv
, "lock") == 0) {
1108 mxlock
|= (1<<RTAX_RTTVAR
);
1111 if (get_time_rtt(&win
, *argv
, &raw
))
1112 invarg("\"rttvar\" value is invalid\n", *argv
);
1113 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_RTTVAR
,
1114 (raw
) ? win
: win
* 4);
1115 } else if (matches(*argv
, "ssthresh") == 0) {
1119 if (strcmp(*argv
, "lock") == 0) {
1120 mxlock
|= (1<<RTAX_SSTHRESH
);
1123 if (get_unsigned(&win
, *argv
, 0))
1124 invarg("\"ssthresh\" value is invalid\n", *argv
);
1125 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_SSTHRESH
, win
);
1126 } else if (matches(*argv
, "realms") == 0) {
1130 if (get_rt_realms_or_raw(&realm
, *argv
))
1131 invarg("\"realm\" value is invalid\n", *argv
);
1132 addattr32(&req
.n
, sizeof(req
), RTA_FLOW
, realm
);
1133 } else if (strcmp(*argv
, "onlink") == 0) {
1134 req
.r
.rtm_flags
|= RTNH_F_ONLINK
;
1135 } else if (strcmp(*argv
, "nexthop") == 0) {
1138 } else if (matches(*argv
, "protocol") == 0) {
1142 if (rtnl_rtprot_a2n(&prot
, *argv
))
1143 invarg("\"protocol\" value is invalid\n", *argv
);
1144 req
.r
.rtm_protocol
= prot
;
1145 } else if (matches(*argv
, "table") == 0) {
1149 if (rtnl_rttable_a2n(&tid
, *argv
))
1150 invarg("\"table\" value is invalid\n", *argv
);
1152 req
.r
.rtm_table
= tid
;
1154 req
.r
.rtm_table
= RT_TABLE_UNSPEC
;
1155 addattr32(&req
.n
, sizeof(req
), RTA_TABLE
, tid
);
1158 } else if (matches(*argv
, "vrf") == 0) {
1162 tid
= ipvrf_get_table(*argv
);
1164 invarg("Invalid VRF\n", *argv
);
1166 req
.r
.rtm_table
= tid
;
1168 req
.r
.rtm_table
= RT_TABLE_UNSPEC
;
1169 addattr32(&req
.n
, sizeof(req
), RTA_TABLE
, tid
);
1172 } else if (strcmp(*argv
, "dev") == 0 ||
1173 strcmp(*argv
, "oif") == 0) {
1176 } else if (matches(*argv
, "pref") == 0) {
1180 if (strcmp(*argv
, "low") == 0)
1181 pref
= ICMPV6_ROUTER_PREF_LOW
;
1182 else if (strcmp(*argv
, "medium") == 0)
1183 pref
= ICMPV6_ROUTER_PREF_MEDIUM
;
1184 else if (strcmp(*argv
, "high") == 0)
1185 pref
= ICMPV6_ROUTER_PREF_HIGH
;
1186 else if (get_u8(&pref
, *argv
, 0))
1187 invarg("\"pref\" value is invalid\n", *argv
);
1188 addattr8(&req
.n
, sizeof(req
), RTA_PREF
, pref
);
1189 } else if (strcmp(*argv
, "encap") == 0) {
1191 struct rtattr
*rta
= (void *)buf
;
1193 rta
->rta_type
= RTA_ENCAP
;
1194 rta
->rta_len
= RTA_LENGTH(0);
1196 lwt_parse_encap(rta
, sizeof(buf
), &argc
, &argv
);
1198 if (rta
->rta_len
> RTA_LENGTH(0))
1199 addraw_l(&req
.n
, 1024, RTA_DATA(rta
), RTA_PAYLOAD(rta
));
1200 } else if (strcmp(*argv
, "ttl-propagate") == 0) {
1204 if (matches(*argv
, "enabled") == 0)
1206 else if (matches(*argv
, "disabled") == 0)
1209 invarg("\"ttl-propagate\" value is invalid\n",
1212 addattr8(&req
.n
, sizeof(req
), RTA_TTL_PROPAGATE
,
1218 if (strcmp(*argv
, "to") == 0) {
1221 if ((**argv
< '0' || **argv
> '9') &&
1222 rtnl_rtntype_a2n(&type
, *argv
) == 0) {
1224 req
.r
.rtm_type
= type
;
1228 if (matches(*argv
, "help") == 0)
1231 duparg2("to", *argv
);
1232 get_prefix(&dst
, *argv
, req
.r
.rtm_family
);
1233 if (req
.r
.rtm_family
== AF_UNSPEC
)
1234 req
.r
.rtm_family
= dst
.family
;
1235 req
.r
.rtm_dst_len
= dst
.bitlen
;
1238 addattr_l(&req
.n
, sizeof(req
), RTA_DST
, &dst
.data
, dst
.bytelen
);
1249 if ((idx
= ll_name_to_index(d
)) == 0) {
1250 fprintf(stderr
, "Cannot find device \"%s\"\n", d
);
1253 addattr32(&req
.n
, sizeof(req
), RTA_OIF
, idx
);
1256 if (mxrta
->rta_len
> RTA_LENGTH(0)) {
1258 rta_addattr32(mxrta
, sizeof(mxbuf
), RTAX_LOCK
, mxlock
);
1259 addattr_l(&req
.n
, sizeof(req
), RTA_METRICS
, RTA_DATA(mxrta
), RTA_PAYLOAD(mxrta
));
1263 parse_nexthops(&req
.n
, &req
.r
, argc
, argv
);
1265 if (req
.r
.rtm_family
== AF_UNSPEC
)
1266 req
.r
.rtm_family
= AF_INET
;
1269 if (req
.r
.rtm_type
== RTN_LOCAL
||
1270 req
.r
.rtm_type
== RTN_BROADCAST
||
1271 req
.r
.rtm_type
== RTN_NAT
||
1272 req
.r
.rtm_type
== RTN_ANYCAST
)
1273 req
.r
.rtm_table
= RT_TABLE_LOCAL
;
1276 if (req
.r
.rtm_family
== AF_INET6
||
1277 req
.r
.rtm_family
== AF_MPLS
)
1278 req
.r
.rtm_scope
= RT_SCOPE_UNIVERSE
;
1279 else if (req
.r
.rtm_type
== RTN_LOCAL
||
1280 req
.r
.rtm_type
== RTN_NAT
)
1281 req
.r
.rtm_scope
= RT_SCOPE_HOST
;
1282 else if (req
.r
.rtm_type
== RTN_BROADCAST
||
1283 req
.r
.rtm_type
== RTN_MULTICAST
||
1284 req
.r
.rtm_type
== RTN_ANYCAST
)
1285 req
.r
.rtm_scope
= RT_SCOPE_LINK
;
1286 else if (req
.r
.rtm_type
== RTN_UNICAST
||
1287 req
.r
.rtm_type
== RTN_UNSPEC
) {
1288 if (cmd
== RTM_DELROUTE
)
1289 req
.r
.rtm_scope
= RT_SCOPE_NOWHERE
;
1290 else if (!gw_ok
&& !nhs_ok
)
1291 req
.r
.rtm_scope
= RT_SCOPE_LINK
;
1295 if (!type_ok
&& req
.r
.rtm_family
== AF_MPLS
)
1296 req
.r
.rtm_type
= RTN_UNICAST
;
1298 if (rtnl_talk(&rth
, &req
.n
, NULL
, 0) < 0)
1304 static int rtnl_rtcache_request(struct rtnl_handle
*rth
, int family
)
1307 struct nlmsghdr nlh
;
1310 .nlh
.nlmsg_len
= sizeof(req
),
1311 .nlh
.nlmsg_type
= RTM_GETROUTE
,
1312 .nlh
.nlmsg_flags
= NLM_F_ROOT
| NLM_F_REQUEST
,
1313 .nlh
.nlmsg_seq
= rth
->dump
= ++rth
->seq
,
1314 .rtm
.rtm_family
= family
,
1315 .rtm
.rtm_flags
= RTM_F_CLONED
,
1317 struct sockaddr_nl nladdr
= { .nl_family
= AF_NETLINK
};
1319 return sendto(rth
->fd
, (void *)&req
, sizeof(req
), 0, (struct sockaddr
*)&nladdr
, sizeof(nladdr
));
1322 static int iproute_flush_cache(void)
1324 #define ROUTE_FLUSH_PATH "/proc/sys/net/ipv4/route/flush"
1327 int flush_fd
= open(ROUTE_FLUSH_PATH
, O_WRONLY
);
1328 char *buffer
= "-1";
1331 fprintf(stderr
, "Cannot open \"%s\": %s\n",
1332 ROUTE_FLUSH_PATH
, strerror(errno
));
1336 len
= strlen(buffer
);
1338 if ((write(flush_fd
, (void *)buffer
, len
)) < len
) {
1339 fprintf(stderr
, "Cannot flush routing cache\n");
1347 static __u32 route_dump_magic
= 0x45311224;
1349 static int save_route(const struct sockaddr_nl
*who
, struct nlmsghdr
*n
,
1353 int len
= n
->nlmsg_len
;
1354 struct rtmsg
*r
= NLMSG_DATA(n
);
1355 struct rtattr
*tb
[RTA_MAX
+1];
1358 host_len
= af_bit_len(r
->rtm_family
);
1359 len
-= NLMSG_LENGTH(sizeof(*r
));
1360 parse_rtattr(tb
, RTA_MAX
, RTM_RTA(r
), len
);
1362 if (!filter_nlmsg(n
, tb
, host_len
))
1365 ret
= write(STDOUT_FILENO
, n
, n
->nlmsg_len
);
1366 if ((ret
> 0) && (ret
!= n
->nlmsg_len
)) {
1367 fprintf(stderr
, "Short write while saving nlmsg\n");
1371 return ret
== n
->nlmsg_len
? 0 : ret
;
1374 static int save_route_prep(void)
1378 if (isatty(STDOUT_FILENO
)) {
1379 fprintf(stderr
, "Not sending a binary stream to stdout\n");
1383 ret
= write(STDOUT_FILENO
, &route_dump_magic
, sizeof(route_dump_magic
));
1384 if (ret
!= sizeof(route_dump_magic
)) {
1385 fprintf(stderr
, "Can't write magic to dump file\n");
1392 static int iproute_list_flush_or_save(int argc
, char **argv
, int action
)
1394 int do_ipv6
= preferred_family
;
1397 unsigned int mark
= 0;
1398 rtnl_filter_t filter_fn
;
1400 if (action
== IPROUTE_SAVE
) {
1401 if (save_route_prep())
1404 filter_fn
= save_route
;
1406 filter_fn
= print_route
;
1408 iproute_reset_filter(0);
1409 filter
.tb
= RT_TABLE_MAIN
;
1411 if ((action
== IPROUTE_FLUSH
) && argc
<= 0) {
1412 fprintf(stderr
, "\"ip route flush\" requires arguments.\n");
1417 if (matches(*argv
, "table") == 0) {
1421 if (rtnl_rttable_a2n(&tid
, *argv
)) {
1422 if (strcmp(*argv
, "all") == 0) {
1424 } else if (strcmp(*argv
, "cache") == 0) {
1426 } else if (strcmp(*argv
, "help") == 0) {
1429 invarg("table id value is invalid\n", *argv
);
1433 } else if (matches(*argv
, "vrf") == 0) {
1437 tid
= ipvrf_get_table(*argv
);
1439 invarg("Invalid VRF\n", *argv
);
1441 filter
.typemask
= ~(1 << RTN_LOCAL
| 1<<RTN_BROADCAST
);
1442 } else if (matches(*argv
, "cached") == 0 ||
1443 matches(*argv
, "cloned") == 0) {
1445 } else if (strcmp(*argv
, "tos") == 0 ||
1446 matches(*argv
, "dsfield") == 0) {
1450 if (rtnl_dsfield_a2n(&tos
, *argv
))
1451 invarg("TOS value is invalid\n", *argv
);
1453 filter
.tosmask
= -1;
1454 } else if (matches(*argv
, "protocol") == 0) {
1458 filter
.protocolmask
= -1;
1459 if (rtnl_rtprot_a2n(&prot
, *argv
)) {
1460 if (strcmp(*argv
, "all") != 0)
1461 invarg("invalid \"protocol\"\n", *argv
);
1463 filter
.protocolmask
= 0;
1465 filter
.protocol
= prot
;
1466 } else if (matches(*argv
, "scope") == 0) {
1470 filter
.scopemask
= -1;
1471 if (rtnl_rtscope_a2n(&scope
, *argv
)) {
1472 if (strcmp(*argv
, "all") != 0)
1473 invarg("invalid \"scope\"\n", *argv
);
1474 scope
= RT_SCOPE_NOWHERE
;
1475 filter
.scopemask
= 0;
1477 filter
.scope
= scope
;
1478 } else if (matches(*argv
, "type") == 0) {
1482 if (rtnl_rtntype_a2n(&type
, *argv
))
1483 invarg("node type value is invalid\n", *argv
);
1484 filter
.typemask
= (1<<type
);
1485 } else if (strcmp(*argv
, "dev") == 0 ||
1486 strcmp(*argv
, "oif") == 0) {
1489 } else if (strcmp(*argv
, "iif") == 0) {
1492 } else if (strcmp(*argv
, "mark") == 0) {
1494 get_unsigned(&mark
, *argv
, 0);
1495 filter
.markmask
= -1;
1496 } else if (strcmp(*argv
, "via") == 0) {
1500 family
= read_family(*argv
);
1501 if (family
== AF_UNSPEC
)
1505 get_prefix(&filter
.rvia
, *argv
, family
);
1506 } else if (strcmp(*argv
, "src") == 0) {
1508 get_prefix(&filter
.rprefsrc
, *argv
, do_ipv6
);
1509 } else if (matches(*argv
, "realms") == 0) {
1513 if (get_rt_realms_or_raw(&realm
, *argv
))
1514 invarg("invalid realms\n", *argv
);
1515 filter
.realm
= realm
;
1516 filter
.realmmask
= ~0U;
1517 if ((filter
.realm
&0xFFFF) == 0 &&
1518 (*argv
)[strlen(*argv
) - 1] == '/')
1519 filter
.realmmask
&= ~0xFFFF;
1520 if ((filter
.realm
&0xFFFF0000U
) == 0 &&
1521 (strchr(*argv
, '/') == NULL
||
1523 filter
.realmmask
&= ~0xFFFF0000U
;
1524 } else if (matches(*argv
, "from") == 0) {
1526 if (matches(*argv
, "root") == 0) {
1528 get_prefix(&filter
.rsrc
, *argv
, do_ipv6
);
1529 } else if (matches(*argv
, "match") == 0) {
1531 get_prefix(&filter
.msrc
, *argv
, do_ipv6
);
1533 if (matches(*argv
, "exact") == 0) {
1536 get_prefix(&filter
.msrc
, *argv
, do_ipv6
);
1537 filter
.rsrc
= filter
.msrc
;
1540 if (matches(*argv
, "to") == 0) {
1543 if (matches(*argv
, "root") == 0) {
1545 get_prefix(&filter
.rdst
, *argv
, do_ipv6
);
1546 } else if (matches(*argv
, "match") == 0) {
1548 get_prefix(&filter
.mdst
, *argv
, do_ipv6
);
1550 if (matches(*argv
, "exact") == 0) {
1553 get_prefix(&filter
.mdst
, *argv
, do_ipv6
);
1554 filter
.rdst
= filter
.mdst
;
1560 if (do_ipv6
== AF_UNSPEC
&& filter
.tb
)
1567 if ((idx
= ll_name_to_index(id
)) == 0) {
1568 fprintf(stderr
, "Cannot find device \"%s\"\n", id
);
1572 filter
.iifmask
= -1;
1575 if ((idx
= ll_name_to_index(od
)) == 0) {
1576 fprintf(stderr
, "Cannot find device \"%s\"\n", od
);
1580 filter
.oifmask
= -1;
1585 if (action
== IPROUTE_FLUSH
) {
1587 char flushb
[4096-512];
1588 time_t start
= time(0);
1590 if (filter
.cloned
) {
1591 if (do_ipv6
!= AF_INET6
) {
1592 iproute_flush_cache();
1594 printf("*** IPv4 routing cache is flushed.\n");
1596 if (do_ipv6
== AF_INET
)
1600 filter
.flushb
= flushb
;
1602 filter
.flushe
= sizeof(flushb
);
1605 if (rtnl_wilddump_request(&rth
, do_ipv6
, RTM_GETROUTE
) < 0) {
1606 perror("Cannot send dump request");
1610 if (rtnl_dump_filter(&rth
, filter_fn
, stdout
) < 0) {
1611 fprintf(stderr
, "Flush terminated\n");
1614 if (filter
.flushed
== 0) {
1616 if (round
== 0 && (!filter
.cloned
|| do_ipv6
== AF_INET6
))
1617 printf("Nothing to flush.\n");
1619 printf("*** Flush is complete after %d round%s ***\n", round
, round
> 1?"s":"");
1625 if (flush_update() < 0)
1628 if (time(0) - start
> 30) {
1629 printf("\n*** Flush not completed after %ld seconds, %d entries remain ***\n",
1630 (long)(time(0) - start
), filter
.flushed
);
1635 printf("\n*** Round %d, deleting %d entries ***\n", round
, filter
.flushed
);
1641 if (!filter
.cloned
) {
1642 if (rtnl_wilddump_request(&rth
, do_ipv6
, RTM_GETROUTE
) < 0) {
1643 perror("Cannot send dump request");
1647 if (rtnl_rtcache_request(&rth
, do_ipv6
) < 0) {
1648 perror("Cannot send dump request");
1653 if (rtnl_dump_filter(&rth
, filter_fn
, stdout
) < 0) {
1654 fprintf(stderr
, "Dump terminated\n");
1662 static int iproute_get(int argc
, char **argv
)
1669 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct rtmsg
)),
1670 .n
.nlmsg_flags
= NLM_F_REQUEST
,
1671 .n
.nlmsg_type
= RTM_GETROUTE
,
1672 .r
.rtm_family
= preferred_family
,
1679 unsigned int mark
= 0;
1681 iproute_reset_filter(0);
1685 if (strcmp(*argv
, "tos") == 0 ||
1686 matches(*argv
, "dsfield") == 0) {
1690 if (rtnl_dsfield_a2n(&tos
, *argv
))
1691 invarg("TOS value is invalid\n", *argv
);
1692 req
.r
.rtm_tos
= tos
;
1693 } else if (matches(*argv
, "from") == 0) {
1697 if (matches(*argv
, "help") == 0)
1700 get_prefix(&addr
, *argv
, req
.r
.rtm_family
);
1701 if (req
.r
.rtm_family
== AF_UNSPEC
)
1702 req
.r
.rtm_family
= addr
.family
;
1704 addattr_l(&req
.n
, sizeof(req
), RTA_SRC
, &addr
.data
, addr
.bytelen
);
1705 req
.r
.rtm_src_len
= addr
.bitlen
;
1706 } else if (matches(*argv
, "iif") == 0) {
1709 } else if (matches(*argv
, "mark") == 0) {
1711 get_unsigned(&mark
, *argv
, 0);
1712 } else if (matches(*argv
, "oif") == 0 ||
1713 strcmp(*argv
, "dev") == 0) {
1716 } else if (matches(*argv
, "notify") == 0) {
1717 req
.r
.rtm_flags
|= RTM_F_NOTIFY
;
1718 } else if (matches(*argv
, "connected") == 0) {
1720 } else if (matches(*argv
, "vrf") == 0) {
1722 if (!name_is_vrf(*argv
))
1723 invarg("Invalid VRF\n", *argv
);
1725 } else if (matches(*argv
, "uid") == 0) {
1729 if (get_unsigned(&uid
, *argv
, 0))
1730 invarg("invalid UID\n", *argv
);
1731 addattr32(&req
.n
, sizeof(req
), RTA_UID
, uid
);
1732 } else if (matches(*argv
, "fibmatch") == 0) {
1737 if (strcmp(*argv
, "to") == 0) {
1740 if (matches(*argv
, "help") == 0)
1742 get_prefix(&addr
, *argv
, req
.r
.rtm_family
);
1743 if (req
.r
.rtm_family
== AF_UNSPEC
)
1744 req
.r
.rtm_family
= addr
.family
;
1746 addattr_l(&req
.n
, sizeof(req
), RTA_DST
, &addr
.data
, addr
.bytelen
);
1747 req
.r
.rtm_dst_len
= addr
.bitlen
;
1752 if (req
.r
.rtm_dst_len
== 0) {
1753 fprintf(stderr
, "need at least a destination address\n");
1761 if ((idx
= ll_name_to_index(idev
)) == 0) {
1762 fprintf(stderr
, "Cannot find device \"%s\"\n", idev
);
1765 addattr32(&req
.n
, sizeof(req
), RTA_IIF
, idx
);
1768 if ((idx
= ll_name_to_index(odev
)) == 0) {
1769 fprintf(stderr
, "Cannot find device \"%s\"\n", odev
);
1772 addattr32(&req
.n
, sizeof(req
), RTA_OIF
, idx
);
1776 addattr32(&req
.n
, sizeof(req
), RTA_MARK
, mark
);
1778 if (req
.r
.rtm_family
== AF_UNSPEC
)
1779 req
.r
.rtm_family
= AF_INET
;
1781 req
.r
.rtm_flags
|= RTM_F_LOOKUP_TABLE
;
1783 req
.r
.rtm_flags
|= RTM_F_FIB_MATCH
;
1785 if (rtnl_talk(&rth
, &req
.n
, &req
.n
, sizeof(req
)) < 0)
1788 if (connected
&& !from_ok
) {
1789 struct rtmsg
*r
= NLMSG_DATA(&req
.n
);
1790 int len
= req
.n
.nlmsg_len
;
1791 struct rtattr
*tb
[RTA_MAX
+1];
1793 if (print_route(NULL
, &req
.n
, (void *)stdout
) < 0) {
1794 fprintf(stderr
, "An error :-)\n");
1798 if (req
.n
.nlmsg_type
!= RTM_NEWROUTE
) {
1799 fprintf(stderr
, "Not a route?\n");
1802 len
-= NLMSG_LENGTH(sizeof(*r
));
1804 fprintf(stderr
, "Wrong len %d\n", len
);
1808 parse_rtattr(tb
, RTA_MAX
, RTM_RTA(r
), len
);
1810 if (tb
[RTA_PREFSRC
]) {
1811 tb
[RTA_PREFSRC
]->rta_type
= RTA_SRC
;
1812 r
->rtm_src_len
= 8*RTA_PAYLOAD(tb
[RTA_PREFSRC
]);
1813 } else if (!tb
[RTA_SRC
]) {
1814 fprintf(stderr
, "Failed to connect the route\n");
1817 if (!odev
&& tb
[RTA_OIF
])
1818 tb
[RTA_OIF
]->rta_type
= 0;
1819 if (tb
[RTA_GATEWAY
])
1820 tb
[RTA_GATEWAY
]->rta_type
= 0;
1822 tb
[RTA_VIA
]->rta_type
= 0;
1823 if (!idev
&& tb
[RTA_IIF
])
1824 tb
[RTA_IIF
]->rta_type
= 0;
1825 req
.n
.nlmsg_flags
= NLM_F_REQUEST
;
1826 req
.n
.nlmsg_type
= RTM_GETROUTE
;
1828 if (rtnl_talk(&rth
, &req
.n
, &req
.n
, sizeof(req
)) < 0)
1832 if (print_route(NULL
, &req
.n
, (void *)stdout
) < 0) {
1833 fprintf(stderr
, "An error :-)\n");
1840 static int rtattr_cmp(const struct rtattr
*rta1
, const struct rtattr
*rta2
)
1842 if (!rta1
|| !rta2
|| rta1
->rta_len
!= rta2
->rta_len
)
1845 return memcmp(RTA_DATA(rta1
), RTA_DATA(rta2
), RTA_PAYLOAD(rta1
));
1848 static int restore_handler(const struct sockaddr_nl
*nl
,
1849 struct rtnl_ctrl_data
*ctrl
,
1850 struct nlmsghdr
*n
, void *arg
)
1852 struct rtmsg
*r
= NLMSG_DATA(n
);
1853 struct rtattr
*tb
[RTA_MAX
+1];
1854 int len
= n
->nlmsg_len
- NLMSG_LENGTH(sizeof(*r
));
1855 int ret
, prio
= *(int *)arg
;
1857 parse_rtattr(tb
, RTA_MAX
, RTM_RTA(r
), len
);
1859 /* Restore routes in correct order:
1860 * 0. ones for local addresses,
1861 * 1. ones for local networks,
1862 * 2. others (remote networks/hosts).
1864 if (!prio
&& !tb
[RTA_GATEWAY
] && (!tb
[RTA_PREFSRC
] ||
1865 !rtattr_cmp(tb
[RTA_PREFSRC
], tb
[RTA_DST
])))
1867 else if (prio
== 1 && !tb
[RTA_GATEWAY
] && tb
[RTA_PREFSRC
] &&
1868 rtattr_cmp(tb
[RTA_PREFSRC
], tb
[RTA_DST
]))
1870 else if (prio
== 2 && tb
[RTA_GATEWAY
])
1876 n
->nlmsg_flags
|= NLM_F_REQUEST
| NLM_F_CREATE
| NLM_F_ACK
;
1880 ret
= rtnl_talk(&rth
, n
, n
, sizeof(*n
));
1881 if ((ret
< 0) && (errno
== EEXIST
))
1887 static int route_dump_check_magic(void)
1892 if (isatty(STDIN_FILENO
)) {
1893 fprintf(stderr
, "Can't restore route dump from a terminal\n");
1897 ret
= fread(&magic
, sizeof(magic
), 1, stdin
);
1898 if (magic
!= route_dump_magic
) {
1899 fprintf(stderr
, "Magic mismatch (%d elems, %x magic)\n", ret
, magic
);
1906 static int iproute_restore(void)
1910 if (route_dump_check_magic())
1915 perror("Failed to restore: ftell");
1919 for (prio
= 0; prio
< 3; prio
++) {
1922 err
= rtnl_from_file(stdin
, &restore_handler
, &prio
);
1926 if (fseek(stdin
, pos
, SEEK_SET
) == -1) {
1927 perror("Failed to restore: fseek");
1935 static int show_handler(const struct sockaddr_nl
*nl
,
1936 struct rtnl_ctrl_data
*ctrl
,
1937 struct nlmsghdr
*n
, void *arg
)
1939 print_route(nl
, n
, stdout
);
1943 static int iproute_showdump(void)
1945 if (route_dump_check_magic())
1948 exit(rtnl_from_file(stdin
, &show_handler
, NULL
));
1951 void iproute_reset_filter(int ifindex
)
1953 memset(&filter
, 0, sizeof(filter
));
1954 filter
.mdst
.bitlen
= -1;
1955 filter
.msrc
.bitlen
= -1;
1956 filter
.oif
= ifindex
;
1958 filter
.oifmask
= -1;
1961 int do_iproute(int argc
, char **argv
)
1964 return iproute_list_flush_or_save(0, NULL
, IPROUTE_LIST
);
1966 if (matches(*argv
, "add") == 0)
1967 return iproute_modify(RTM_NEWROUTE
, NLM_F_CREATE
|NLM_F_EXCL
,
1969 if (matches(*argv
, "change") == 0 || strcmp(*argv
, "chg") == 0)
1970 return iproute_modify(RTM_NEWROUTE
, NLM_F_REPLACE
,
1972 if (matches(*argv
, "replace") == 0)
1973 return iproute_modify(RTM_NEWROUTE
, NLM_F_CREATE
|NLM_F_REPLACE
,
1975 if (matches(*argv
, "prepend") == 0)
1976 return iproute_modify(RTM_NEWROUTE
, NLM_F_CREATE
,
1978 if (matches(*argv
, "append") == 0)
1979 return iproute_modify(RTM_NEWROUTE
, NLM_F_CREATE
|NLM_F_APPEND
,
1981 if (matches(*argv
, "test") == 0)
1982 return iproute_modify(RTM_NEWROUTE
, NLM_F_EXCL
,
1984 if (matches(*argv
, "delete") == 0)
1985 return iproute_modify(RTM_DELROUTE
, 0,
1987 if (matches(*argv
, "list") == 0 || matches(*argv
, "show") == 0
1988 || matches(*argv
, "lst") == 0)
1989 return iproute_list_flush_or_save(argc
-1, argv
+1, IPROUTE_LIST
);
1990 if (matches(*argv
, "get") == 0)
1991 return iproute_get(argc
-1, argv
+1);
1992 if (matches(*argv
, "flush") == 0)
1993 return iproute_list_flush_or_save(argc
-1, argv
+1, IPROUTE_FLUSH
);
1994 if (matches(*argv
, "save") == 0)
1995 return iproute_list_flush_or_save(argc
-1, argv
+1, IPROUTE_SAVE
);
1996 if (matches(*argv
, "restore") == 0)
1997 return iproute_restore();
1998 if (matches(*argv
, "showdump") == 0)
1999 return iproute_showdump();
2000 if (matches(*argv
, "help") == 0)
2002 fprintf(stderr
, "Command \"%s\" is unknown, try \"ip route help\".\n", *argv
);