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git.proxmox.com Git - mirror_iproute2.git/blob - ip/ipneigh.c
2 * ipneigh.c "ip neigh".
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>
20 #include <sys/socket.h>
21 #include <netinet/in.h>
22 #include <netinet/ip.h>
26 #include "ip_common.h"
28 #define NUD_VALID (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE|NUD_PROBE|NUD_STALE|NUD_DELAY)
45 static void usage(void) __attribute__((noreturn
));
47 static void usage(void)
49 fprintf(stderr
, "Usage: ip neigh { add | del | change | replace }\n"
50 " { ADDR [ lladdr LLADDR ] [ nud STATE ] | proxy ADDR } [ dev DEV ]\n");
51 fprintf(stderr
, " ip neigh { show | flush } [ proxy ] [ to PREFIX ] [ dev DEV ] [ nud STATE ]\n");
52 fprintf(stderr
, " [ vrf NAME ]\n\n");
53 fprintf(stderr
, "STATE := { permanent | noarp | stale | reachable | none |\n"
54 " incomplete | delay | probe | failed }\n");
58 static int nud_state_a2n(unsigned int *state
, const char *arg
)
60 if (matches(arg
, "permanent") == 0)
61 *state
= NUD_PERMANENT
;
62 else if (matches(arg
, "reachable") == 0)
63 *state
= NUD_REACHABLE
;
64 else if (strcmp(arg
, "noarp") == 0)
66 else if (strcmp(arg
, "none") == 0)
68 else if (strcmp(arg
, "stale") == 0)
70 else if (strcmp(arg
, "incomplete") == 0)
71 *state
= NUD_INCOMPLETE
;
72 else if (strcmp(arg
, "delay") == 0)
74 else if (strcmp(arg
, "probe") == 0)
76 else if (matches(arg
, "failed") == 0)
79 if (get_unsigned(state
, arg
, 0))
81 if (*state
>= 0x100 || (*state
&((*state
)-1)))
87 static int flush_update(void)
89 if (rtnl_send_check(&rth
, filter
.flushb
, filter
.flushp
) < 0) {
90 perror("Failed to send flush request");
98 static int ipneigh_modify(int cmd
, int flags
, int argc
, char **argv
)
105 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ndmsg
)),
106 .n
.nlmsg_flags
= NLM_F_REQUEST
| flags
,
108 .ndm
.ndm_family
= preferred_family
,
109 .ndm
.ndm_state
= NUD_PERMANENT
,
119 if (matches(*argv
, "lladdr") == 0) {
122 duparg("lladdr", *argv
);
125 } else if (strcmp(*argv
, "nud") == 0) {
129 if (nud_state_a2n(&state
, *argv
))
130 invarg("nud state is bad", *argv
);
131 req
.ndm
.ndm_state
= state
;
132 } else if (matches(*argv
, "proxy") == 0) {
134 if (matches(*argv
, "help") == 0)
137 duparg("address", *argv
);
138 get_addr(&dst
, *argv
, preferred_family
);
141 req
.ndm
.ndm_flags
|= NTF_PROXY
;
142 } else if (strcmp(*argv
, "dev") == 0) {
147 if (strcmp(*argv
, "to") == 0) {
150 if (matches(*argv
, "help") == 0) {
154 duparg2("to", *argv
);
155 get_addr(&dst
, *argv
, preferred_family
);
160 if (!dev_ok
|| !dst_ok
|| dst
.family
== AF_UNSPEC
) {
161 fprintf(stderr
, "Device and destination are required arguments.\n");
164 req
.ndm
.ndm_family
= dst
.family
;
165 if (addattr_l(&req
.n
, sizeof(req
), NDA_DST
, &dst
.data
, dst
.bytelen
) < 0)
168 if (lla
&& strcmp(lla
, "null")) {
172 l
= ll_addr_a2n(llabuf
, sizeof(llabuf
), lla
);
176 if (addattr_l(&req
.n
, sizeof(req
), NDA_LLADDR
, llabuf
, l
) < 0)
182 if (dev
&& (req
.ndm
.ndm_ifindex
= ll_name_to_index(dev
)) == 0) {
183 fprintf(stderr
, "Cannot find device \"%s\"\n", dev
);
187 if (rtnl_talk(&rth
, &req
.n
, NULL
) < 0)
194 int print_neigh(const struct sockaddr_nl
*who
, struct nlmsghdr
*n
, void *arg
)
196 FILE *fp
= (FILE *)arg
;
197 struct ndmsg
*r
= NLMSG_DATA(n
);
198 int len
= n
->nlmsg_len
;
199 struct rtattr
*tb
[NDA_MAX
+1];
200 static int logit
= 1;
202 if (n
->nlmsg_type
!= RTM_NEWNEIGH
&& n
->nlmsg_type
!= RTM_DELNEIGH
&&
203 n
->nlmsg_type
!= RTM_GETNEIGH
) {
204 fprintf(stderr
, "Not RTM_NEWNEIGH: %08x %08x %08x\n",
205 n
->nlmsg_len
, n
->nlmsg_type
, n
->nlmsg_flags
);
209 len
-= NLMSG_LENGTH(sizeof(*r
));
211 fprintf(stderr
, "BUG: wrong nlmsg len %d\n", len
);
215 if (filter
.flushb
&& n
->nlmsg_type
!= RTM_NEWNEIGH
)
218 if (filter
.family
&& filter
.family
!= r
->ndm_family
)
220 if (filter
.index
&& filter
.index
!= r
->ndm_ifindex
)
222 if (!(filter
.state
&r
->ndm_state
) &&
223 !(r
->ndm_flags
& NTF_PROXY
) &&
224 (r
->ndm_state
|| !(filter
.state
&0x100)) &&
225 (r
->ndm_family
!= AF_DECnet
))
228 if (filter
.master
&& !(n
->nlmsg_flags
& NLM_F_DUMP_FILTERED
)) {
232 "\nWARNING: Kernel does not support filtering by master device\n\n");
236 parse_rtattr(tb
, NDA_MAX
, NDA_RTA(r
), n
->nlmsg_len
- NLMSG_LENGTH(sizeof(*r
)));
239 if (filter
.pfx
.family
) {
240 inet_prefix dst
= { .family
= r
->ndm_family
};
242 memcpy(&dst
.data
, RTA_DATA(tb
[NDA_DST
]), RTA_PAYLOAD(tb
[NDA_DST
]));
243 if (inet_addr_match(&dst
, &filter
.pfx
, filter
.pfx
.bitlen
))
247 if (filter
.unused_only
&& tb
[NDA_CACHEINFO
]) {
248 struct nda_cacheinfo
*ci
= RTA_DATA(tb
[NDA_CACHEINFO
]);
257 if (NLMSG_ALIGN(filter
.flushp
) + n
->nlmsg_len
> filter
.flushe
) {
261 fn
= (struct nlmsghdr
*)(filter
.flushb
+ NLMSG_ALIGN(filter
.flushp
));
262 memcpy(fn
, n
, n
->nlmsg_len
);
263 fn
->nlmsg_type
= RTM_DELNEIGH
;
264 fn
->nlmsg_flags
= NLM_F_REQUEST
;
265 fn
->nlmsg_seq
= ++rth
.seq
;
266 filter
.flushp
= (((char *)fn
) + n
->nlmsg_len
) - filter
.flushb
;
272 if (n
->nlmsg_type
== RTM_DELNEIGH
)
273 fprintf(fp
, "Deleted ");
274 else if (n
->nlmsg_type
== RTM_GETNEIGH
)
275 fprintf(fp
, "miss ");
278 format_host_rta(r
->ndm_family
, tb
[NDA_DST
]));
280 if (!filter
.index
&& r
->ndm_ifindex
)
281 fprintf(fp
, "dev %s ", ll_index_to_name(r
->ndm_ifindex
));
282 if (tb
[NDA_LLADDR
]) {
284 fprintf(fp
, "lladdr %s", ll_addr_n2a(RTA_DATA(tb
[NDA_LLADDR
]),
285 RTA_PAYLOAD(tb
[NDA_LLADDR
]),
286 ll_index_to_type(r
->ndm_ifindex
),
289 if (r
->ndm_flags
& NTF_ROUTER
) {
290 fprintf(fp
, " router");
292 if (r
->ndm_flags
& NTF_PROXY
) {
293 fprintf(fp
, " proxy");
295 if (tb
[NDA_CACHEINFO
] && show_stats
) {
296 struct nda_cacheinfo
*ci
= RTA_DATA(tb
[NDA_CACHEINFO
]);
297 int hz
= get_user_hz();
300 printf(" ref %d", ci
->ndm_refcnt
);
301 fprintf(fp
, " used %d/%d/%d", ci
->ndm_used
/hz
,
302 ci
->ndm_confirmed
/hz
, ci
->ndm_updated
/hz
);
305 if (tb
[NDA_PROBES
] && show_stats
) {
306 __u32 p
= rta_getattr_u32(tb
[NDA_PROBES
]);
308 fprintf(fp
, " probes %u", p
);
312 int nud
= r
->ndm_state
;
316 #define PRINT_FLAG(f) if (nud & NUD_##f) { \
317 nud &= ~NUD_##f; fprintf(fp, #f "%s", nud ? "," : ""); }
318 PRINT_FLAG(INCOMPLETE
);
319 PRINT_FLAG(REACHABLE
);
325 PRINT_FLAG(PERMANENT
);
334 void ipneigh_reset_filter(int ifindex
)
336 memset(&filter
, 0, sizeof(filter
));
338 filter
.index
= ifindex
;
341 static int do_show_or_flush(int argc
, char **argv
, int flush
)
348 .n
.nlmsg_type
= RTM_GETNEIGH
,
349 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ndmsg
)),
351 char *filter_dev
= NULL
;
354 ipneigh_reset_filter(0);
357 filter
.family
= preferred_family
;
361 fprintf(stderr
, "Flush requires arguments.\n");
364 filter
.state
= ~(NUD_PERMANENT
|NUD_NOARP
);
366 filter
.state
= 0xFF & ~NUD_NOARP
;
369 if (strcmp(*argv
, "dev") == 0) {
372 duparg("dev", *argv
);
374 } else if (strcmp(*argv
, "master") == 0) {
378 ifindex
= ll_name_to_index(*argv
);
380 invarg("Device does not exist\n", *argv
);
381 addattr32(&req
.n
, sizeof(req
), NDA_MASTER
, ifindex
);
382 filter
.master
= ifindex
;
383 } else if (strcmp(*argv
, "vrf") == 0) {
387 ifindex
= ll_name_to_index(*argv
);
389 invarg("Not a valid VRF name\n", *argv
);
390 if (!name_is_vrf(*argv
))
391 invarg("Not a valid VRF name\n", *argv
);
392 addattr32(&req
.n
, sizeof(req
), NDA_MASTER
, ifindex
);
393 filter
.master
= ifindex
;
394 } else if (strcmp(*argv
, "unused") == 0) {
395 filter
.unused_only
= 1;
396 } else if (strcmp(*argv
, "nud") == 0) {
404 if (nud_state_a2n(&state
, *argv
)) {
405 if (strcmp(*argv
, "all") != 0)
406 invarg("nud state is bad", *argv
);
413 filter
.state
|= state
;
414 } else if (strcmp(*argv
, "proxy") == 0)
415 req
.ndm
.ndm_flags
= NTF_PROXY
;
417 if (strcmp(*argv
, "to") == 0) {
420 if (matches(*argv
, "help") == 0)
422 get_prefix(&filter
.pfx
, *argv
, filter
.family
);
423 if (filter
.family
== AF_UNSPEC
)
424 filter
.family
= filter
.pfx
.family
;
432 if ((filter
.index
= ll_name_to_index(filter_dev
)) == 0) {
433 fprintf(stderr
, "Cannot find device \"%s\"\n", filter_dev
);
436 addattr32(&req
.n
, sizeof(req
), NDA_IFINDEX
, filter
.index
);
439 req
.ndm
.ndm_family
= filter
.family
;
443 char flushb
[4096-512];
445 filter
.flushb
= flushb
;
447 filter
.flushe
= sizeof(flushb
);
449 while (round
< MAX_ROUNDS
) {
450 if (rtnl_dump_request_n(&rth
, &req
.n
) < 0) {
451 perror("Cannot send dump request");
455 if (rtnl_dump_filter(&rth
, print_neigh
, stdout
) < 0) {
456 fprintf(stderr
, "Flush terminated\n");
459 if (filter
.flushed
== 0) {
462 printf("Nothing to flush.\n");
464 printf("*** Flush is complete after %d round%s ***\n", round
, round
> 1?"s":"");
470 if (flush_update() < 0)
473 printf("\n*** Round %d, deleting %d entries ***\n", round
, filter
.flushed
);
476 filter
.state
&= ~NUD_FAILED
;
478 printf("*** Flush not complete bailing out after %d rounds\n",
483 if (rtnl_dump_request_n(&rth
, &req
.n
) < 0) {
484 perror("Cannot send dump request");
488 if (rtnl_dump_filter(&rth
, print_neigh
, stdout
) < 0) {
489 fprintf(stderr
, "Dump terminated\n");
496 int do_ipneigh(int argc
, char **argv
)
499 if (matches(*argv
, "add") == 0)
500 return ipneigh_modify(RTM_NEWNEIGH
, NLM_F_CREATE
|NLM_F_EXCL
, argc
-1, argv
+1);
501 if (matches(*argv
, "change") == 0 ||
502 strcmp(*argv
, "chg") == 0)
503 return ipneigh_modify(RTM_NEWNEIGH
, NLM_F_REPLACE
, argc
-1, argv
+1);
504 if (matches(*argv
, "replace") == 0)
505 return ipneigh_modify(RTM_NEWNEIGH
, NLM_F_CREATE
|NLM_F_REPLACE
, argc
-1, argv
+1);
506 if (matches(*argv
, "delete") == 0)
507 return ipneigh_modify(RTM_DELNEIGH
, 0, argc
-1, argv
+1);
508 if (matches(*argv
, "get") == 0) {
509 fprintf(stderr
, "Sorry, \"neigh get\" is not implemented :-(\n");
512 if (matches(*argv
, "show") == 0 ||
513 matches(*argv
, "lst") == 0 ||
514 matches(*argv
, "list") == 0)
515 return do_show_or_flush(argc
-1, argv
+1, 0);
516 if (matches(*argv
, "flush") == 0)
517 return do_show_or_flush(argc
-1, argv
+1, 1);
518 if (matches(*argv
, "help") == 0)
521 return do_show_or_flush(0, NULL
, 0);
523 fprintf(stderr
, "Command \"%s\" is unknown, try \"ip neigh help\".\n", *argv
);