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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>
19 #include <sys/socket.h>
20 #include <netinet/in.h>
21 #include <netinet/ip.h>
25 #include "ip_common.h"
26 #include "json_print.h"
28 #define NUD_VALID (NUD_PERMANENT|NUD_NOARP|NUD_REACHABLE|NUD_PROBE|NUD_STALE|NUD_DELAY)
47 static void usage(void) __attribute__((noreturn
));
49 static void usage(void)
51 fprintf(stderr
, "Usage: ip neigh { add | del | change | replace }\n"
52 " { ADDR [ lladdr LLADDR ] [ nud STATE ] | proxy ADDR } [ dev DEV ]\n");
53 fprintf(stderr
, " [ router ] [ extern_learn ] [ protocol PROTO ]\n\n");
54 fprintf(stderr
, " ip neigh { show | flush } [ proxy ] [ to PREFIX ] [ dev DEV ] [ nud STATE ]\n");
55 fprintf(stderr
, " [ vrf NAME ]\n\n");
56 fprintf(stderr
, "STATE := { permanent | noarp | stale | reachable | none |\n"
57 " incomplete | delay | probe | failed }\n");
61 static int nud_state_a2n(unsigned int *state
, const char *arg
)
63 if (matches(arg
, "permanent") == 0)
64 *state
= NUD_PERMANENT
;
65 else if (matches(arg
, "reachable") == 0)
66 *state
= NUD_REACHABLE
;
67 else if (strcmp(arg
, "noarp") == 0)
69 else if (strcmp(arg
, "none") == 0)
71 else if (strcmp(arg
, "stale") == 0)
73 else if (strcmp(arg
, "incomplete") == 0)
74 *state
= NUD_INCOMPLETE
;
75 else if (strcmp(arg
, "delay") == 0)
77 else if (strcmp(arg
, "probe") == 0)
79 else if (matches(arg
, "failed") == 0)
82 if (get_unsigned(state
, arg
, 0))
84 if (*state
>= 0x100 || (*state
&((*state
)-1)))
90 static int flush_update(void)
92 if (rtnl_send_check(&rth
, filter
.flushb
, filter
.flushp
) < 0) {
93 perror("Failed to send flush request");
101 static int ipneigh_modify(int cmd
, int flags
, int argc
, char **argv
)
108 .n
.nlmsg_len
= NLMSG_LENGTH(sizeof(struct ndmsg
)),
109 .n
.nlmsg_flags
= NLM_F_REQUEST
| flags
,
111 .ndm
.ndm_family
= preferred_family
,
112 .ndm
.ndm_state
= NUD_PERMANENT
,
122 if (matches(*argv
, "lladdr") == 0) {
125 duparg("lladdr", *argv
);
128 } else if (strcmp(*argv
, "nud") == 0) {
132 if (nud_state_a2n(&state
, *argv
))
133 invarg("nud state is bad", *argv
);
134 req
.ndm
.ndm_state
= state
;
135 } else if (matches(*argv
, "proxy") == 0) {
137 if (matches(*argv
, "help") == 0)
140 duparg("address", *argv
);
141 get_addr(&dst
, *argv
, preferred_family
);
144 req
.ndm
.ndm_flags
|= NTF_PROXY
;
145 } else if (strcmp(*argv
, "router") == 0) {
146 req
.ndm
.ndm_flags
|= NTF_ROUTER
;
147 } else if (matches(*argv
, "extern_learn") == 0) {
148 req
.ndm
.ndm_flags
|= NTF_EXT_LEARNED
;
149 } else if (strcmp(*argv
, "dev") == 0) {
153 } else if (matches(*argv
, "protocol") == 0) {
157 if (rtnl_rtprot_a2n(&proto
, *argv
))
158 invarg("\"protocol\" value is invalid\n", *argv
);
159 if (addattr8(&req
.n
, sizeof(req
), NDA_PROTOCOL
, proto
))
162 if (strcmp(*argv
, "to") == 0) {
165 if (matches(*argv
, "help") == 0) {
169 duparg2("to", *argv
);
170 get_addr(&dst
, *argv
, preferred_family
);
175 if (!dev_ok
|| !dst_ok
|| dst
.family
== AF_UNSPEC
) {
176 fprintf(stderr
, "Device and destination are required arguments.\n");
179 req
.ndm
.ndm_family
= dst
.family
;
180 if (addattr_l(&req
.n
, sizeof(req
), NDA_DST
, &dst
.data
, dst
.bytelen
) < 0)
183 if (lla
&& strcmp(lla
, "null")) {
187 l
= ll_addr_a2n(llabuf
, sizeof(llabuf
), lla
);
191 if (addattr_l(&req
.n
, sizeof(req
), NDA_LLADDR
, llabuf
, l
) < 0)
198 req
.ndm
.ndm_ifindex
= ll_name_to_index(dev
);
199 if (!req
.ndm
.ndm_ifindex
)
203 if (rtnl_talk(&rth
, &req
.n
, NULL
) < 0)
209 static void print_cacheinfo(const struct nda_cacheinfo
*ci
)
217 print_uint(PRINT_ANY
, "refcnt",
218 " ref %u", ci
->ndm_refcnt
);
220 print_uint(PRINT_ANY
, "used", " used %u", ci
->ndm_used
/ hz
);
221 print_uint(PRINT_ANY
, "confirmed", "/%u", ci
->ndm_confirmed
/ hz
);
222 print_uint(PRINT_ANY
, "updated", "/%u", ci
->ndm_updated
/ hz
);
225 static void print_neigh_state(unsigned int nud
)
228 open_json_array(PRINT_JSON
,
229 is_json_context() ? "state" : "");
231 #define PRINT_FLAG(f) \
232 if (nud & NUD_##f) { \
234 print_string(PRINT_ANY, NULL, " %s", #f); \
237 PRINT_FLAG(INCOMPLETE
);
238 PRINT_FLAG(REACHABLE
);
244 PRINT_FLAG(PERMANENT
);
247 close_json_array(PRINT_JSON
, NULL
);
250 int print_neigh(struct nlmsghdr
*n
, void *arg
)
252 FILE *fp
= (FILE *)arg
;
253 struct ndmsg
*r
= NLMSG_DATA(n
);
254 int len
= n
->nlmsg_len
;
255 struct rtattr
*tb
[NDA_MAX
+1];
256 static int logit
= 1;
259 if (n
->nlmsg_type
!= RTM_NEWNEIGH
&& n
->nlmsg_type
!= RTM_DELNEIGH
&&
260 n
->nlmsg_type
!= RTM_GETNEIGH
) {
261 fprintf(stderr
, "Not RTM_NEWNEIGH: %08x %08x %08x\n",
262 n
->nlmsg_len
, n
->nlmsg_type
, n
->nlmsg_flags
);
266 len
-= NLMSG_LENGTH(sizeof(*r
));
268 fprintf(stderr
, "BUG: wrong nlmsg len %d\n", len
);
272 if (filter
.flushb
&& n
->nlmsg_type
!= RTM_NEWNEIGH
)
275 if (filter
.family
&& filter
.family
!= r
->ndm_family
)
277 if (filter
.index
&& filter
.index
!= r
->ndm_ifindex
)
279 if (!(filter
.state
&r
->ndm_state
) &&
280 !(r
->ndm_flags
& NTF_PROXY
) &&
281 !(r
->ndm_flags
& NTF_EXT_LEARNED
) &&
282 (r
->ndm_state
|| !(filter
.state
&0x100)) &&
283 (r
->ndm_family
!= AF_DECnet
))
286 if (filter
.master
&& !(n
->nlmsg_flags
& NLM_F_DUMP_FILTERED
)) {
290 "\nWARNING: Kernel does not support filtering by master device\n\n");
294 parse_rtattr(tb
, NDA_MAX
, NDA_RTA(r
), n
->nlmsg_len
- NLMSG_LENGTH(sizeof(*r
)));
296 if (inet_addr_match_rta(&filter
.pfx
, tb
[NDA_DST
]))
299 if (tb
[NDA_PROTOCOL
])
300 protocol
= rta_getattr_u8(tb
[NDA_PROTOCOL
]);
302 if (filter
.protocol
&& filter
.protocol
!= protocol
)
305 if (filter
.unused_only
&& tb
[NDA_CACHEINFO
]) {
306 struct nda_cacheinfo
*ci
= RTA_DATA(tb
[NDA_CACHEINFO
]);
315 if (NLMSG_ALIGN(filter
.flushp
) + n
->nlmsg_len
> filter
.flushe
) {
319 fn
= (struct nlmsghdr
*)(filter
.flushb
+ NLMSG_ALIGN(filter
.flushp
));
320 memcpy(fn
, n
, n
->nlmsg_len
);
321 fn
->nlmsg_type
= RTM_DELNEIGH
;
322 fn
->nlmsg_flags
= NLM_F_REQUEST
;
323 fn
->nlmsg_seq
= ++rth
.seq
;
324 filter
.flushp
= (((char *)fn
) + n
->nlmsg_len
) - filter
.flushb
;
330 open_json_object(NULL
);
331 if (n
->nlmsg_type
== RTM_DELNEIGH
)
332 print_bool(PRINT_ANY
, "deleted", "Deleted ", true);
333 else if (n
->nlmsg_type
== RTM_GETNEIGH
)
334 print_null(PRINT_ANY
, "miss", "%s ", "miss");
339 dst
= format_host_rta(r
->ndm_family
, tb
[NDA_DST
]);
340 print_color_string(PRINT_ANY
,
341 ifa_family_color(r
->ndm_family
),
345 if (!filter
.index
&& r
->ndm_ifindex
) {
346 if (!is_json_context())
349 print_color_string(PRINT_ANY
, COLOR_IFNAME
,
351 ll_index_to_name(r
->ndm_ifindex
));
354 if (tb
[NDA_LLADDR
]) {
358 lladdr
= ll_addr_n2a(RTA_DATA(tb
[NDA_LLADDR
]),
359 RTA_PAYLOAD(tb
[NDA_LLADDR
]),
360 ll_index_to_type(r
->ndm_ifindex
),
363 if (!is_json_context())
364 fprintf(fp
, "lladdr ");
366 print_color_string(PRINT_ANY
, COLOR_MAC
,
367 "lladdr", "%s", lladdr
);
370 if (r
->ndm_flags
& NTF_ROUTER
)
371 print_null(PRINT_ANY
, "router", " %s", "router");
373 if (r
->ndm_flags
& NTF_PROXY
)
374 print_null(PRINT_ANY
, "proxy", " %s", "proxy");
376 if (r
->ndm_flags
& NTF_EXT_LEARNED
)
377 print_null(PRINT_ANY
, "extern_learn", " %s ", "extern_learn");
380 if (tb
[NDA_CACHEINFO
])
381 print_cacheinfo(RTA_DATA(tb
[NDA_CACHEINFO
]));
384 print_uint(PRINT_ANY
, "probes", " probes %u",
385 rta_getattr_u32(tb
[NDA_PROBES
]));
389 print_neigh_state(r
->ndm_state
);
394 print_string(PRINT_ANY
, "protocol", " proto %s ",
395 rtnl_rtprot_n2a(protocol
, b1
, sizeof(b1
)));
398 print_string(PRINT_FP
, NULL
, "\n", "");
405 void ipneigh_reset_filter(int ifindex
)
407 memset(&filter
, 0, sizeof(filter
));
409 filter
.index
= ifindex
;
412 static int ipneigh_dump_filter(struct nlmsghdr
*nlh
, int reqlen
)
414 struct ndmsg
*ndm
= NLMSG_DATA(nlh
);
417 ndm
->ndm_flags
= filter
.ndm_flags
;
420 err
= addattr32(nlh
, reqlen
, NDA_IFINDEX
, filter
.index
);
425 err
= addattr32(nlh
, reqlen
, NDA_MASTER
, filter
.master
);
433 static int do_show_or_flush(int argc
, char **argv
, int flush
)
435 char *filter_dev
= NULL
;
438 ipneigh_reset_filter(0);
441 filter
.family
= preferred_family
;
445 fprintf(stderr
, "Flush requires arguments.\n");
448 filter
.state
= ~(NUD_PERMANENT
|NUD_NOARP
);
450 filter
.state
= 0xFF & ~NUD_NOARP
;
453 if (strcmp(*argv
, "dev") == 0) {
456 duparg("dev", *argv
);
458 } else if (strcmp(*argv
, "master") == 0) {
462 ifindex
= ll_name_to_index(*argv
);
464 invarg("Device does not exist\n", *argv
);
465 filter
.master
= ifindex
;
466 } else if (strcmp(*argv
, "vrf") == 0) {
470 ifindex
= ll_name_to_index(*argv
);
472 invarg("Not a valid VRF name\n", *argv
);
473 if (!name_is_vrf(*argv
))
474 invarg("Not a valid VRF name\n", *argv
);
475 filter
.master
= ifindex
;
476 } else if (strcmp(*argv
, "unused") == 0) {
477 filter
.unused_only
= 1;
478 } else if (strcmp(*argv
, "nud") == 0) {
486 if (nud_state_a2n(&state
, *argv
)) {
487 if (strcmp(*argv
, "all") != 0)
488 invarg("nud state is bad", *argv
);
495 filter
.state
|= state
;
496 } else if (strcmp(*argv
, "proxy") == 0) {
497 filter
.ndm_flags
= NTF_PROXY
;
498 } else if (matches(*argv
, "protocol") == 0) {
502 if (rtnl_rtprot_a2n(&prot
, *argv
)) {
503 if (strcmp(*argv
, "all"))
504 invarg("invalid \"protocol\"\n", *argv
);
507 filter
.protocol
= prot
;
509 if (strcmp(*argv
, "to") == 0) {
512 if (matches(*argv
, "help") == 0)
514 if (get_prefix(&filter
.pfx
, *argv
, filter
.family
))
515 invarg("to value is invalid\n", *argv
);
516 if (filter
.family
== AF_UNSPEC
)
517 filter
.family
= filter
.pfx
.family
;
525 filter
.index
= ll_name_to_index(filter_dev
);
527 return nodev(filter_dev
);
532 char flushb
[4096-512];
534 filter
.flushb
= flushb
;
536 filter
.flushe
= sizeof(flushb
);
538 while (round
< MAX_ROUNDS
) {
539 if (rtnl_neighdump_req(&rth
, filter
.family
,
540 ipneigh_dump_filter
) < 0) {
541 perror("Cannot send dump request");
545 if (rtnl_dump_filter(&rth
, print_neigh
, stdout
) < 0) {
546 fprintf(stderr
, "Flush terminated\n");
549 if (filter
.flushed
== 0) {
552 printf("Nothing to flush.\n");
554 printf("*** Flush is complete after %d round%s ***\n", round
, round
> 1?"s":"");
560 if (flush_update() < 0)
563 printf("\n*** Round %d, deleting %d entries ***\n", round
, filter
.flushed
);
566 filter
.state
&= ~NUD_FAILED
;
568 printf("*** Flush not complete bailing out after %d rounds\n",
573 if (rtnl_neighdump_req(&rth
, filter
.family
, ipneigh_dump_filter
) < 0) {
574 perror("Cannot send dump request");
579 if (rtnl_dump_filter(&rth
, print_neigh
, stdout
) < 0) {
580 fprintf(stderr
, "Dump terminated\n");
588 int do_ipneigh(int argc
, char **argv
)
591 if (matches(*argv
, "add") == 0)
592 return ipneigh_modify(RTM_NEWNEIGH
, NLM_F_CREATE
|NLM_F_EXCL
, argc
-1, argv
+1);
593 if (matches(*argv
, "change") == 0 ||
594 strcmp(*argv
, "chg") == 0)
595 return ipneigh_modify(RTM_NEWNEIGH
, NLM_F_REPLACE
, argc
-1, argv
+1);
596 if (matches(*argv
, "replace") == 0)
597 return ipneigh_modify(RTM_NEWNEIGH
, NLM_F_CREATE
|NLM_F_REPLACE
, argc
-1, argv
+1);
598 if (matches(*argv
, "delete") == 0)
599 return ipneigh_modify(RTM_DELNEIGH
, 0, argc
-1, argv
+1);
600 if (matches(*argv
, "get") == 0) {
601 fprintf(stderr
, "Sorry, \"neigh get\" is not implemented :-(\n");
604 if (matches(*argv
, "show") == 0 ||
605 matches(*argv
, "lst") == 0 ||
606 matches(*argv
, "list") == 0)
607 return do_show_or_flush(argc
-1, argv
+1, 0);
608 if (matches(*argv
, "flush") == 0)
609 return do_show_or_flush(argc
-1, argv
+1, 1);
610 if (matches(*argv
, "help") == 0)
613 return do_show_or_flush(0, NULL
, 0);
615 fprintf(stderr
, "Command \"%s\" is unknown, try \"ip neigh help\".\n", *argv
);