libnl 3.5.0

nl-neigh-list.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3 * src/nl-neigh-list.c List Neighbours
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation version 2.1
8 * of the License.
9 *
10 * Copyright (c) 2003-2009 Thomas Graf <tgraf@suug.ch>
11 */
12
13 #include <netlink/cli/utils.h>
14 #include <netlink/cli/neigh.h>
15 #include <netlink/cli/link.h>
16
17 #include <linux/netlink.h>
18
19 static void print_usage(void)
20 {
21 printf(
22 "Usage: nl-neigh-list [OPTION]... [NEIGHBOUR]\n"
23 "\n"
24 "Options\n"
25 " -f, --format=TYPE Output format { brief | details | stats }\n"
26 " -h, --help Show this help\n"
27 " -v, --version Show versioning information\n"
28 "\n"
29 "Neighbour Options\n"
30 " -a, --addr=ADDR Destination address of neighbour\n"
31 " -l, --lladdr=ADDR Link layer address of neighbour\n"
32 " -d, --dev=DEV Device the neighbour is connected to\n"
33 " --family=FAMILY Destination address family\n"
34 " --state=STATE Neighbour state, (default = permanent)\n"
35 );
36 exit(0);
37 }
38
39 int main(int argc, char *argv[])
40 {
41 struct nl_sock *sock;
42 struct rtnl_neigh *neigh;
43 struct nl_cache *link_cache, *neigh_cache;
44 struct nl_dump_params params = {
45 .dp_type = NL_DUMP_LINE,
46 .dp_fd = stdout,
47 };
48
49 sock = nl_cli_alloc_socket();
50 nl_cli_connect(sock, NETLINK_ROUTE);
51 link_cache = nl_cli_link_alloc_cache_flags(sock, NL_CACHE_AF_ITER);
52 neigh_cache = nl_cli_neigh_alloc_cache(sock);
53 neigh = nl_cli_neigh_alloc();
54
55 for (;;) {
56 int c, optidx = 0;
57 enum {
58 ARG_FAMILY = 257,
59 ARG_STATE = 258,
60 };
61 static struct option long_opts[] = {
62 { "format", 1, 0, 'f' },
63 { "help", 0, 0, 'h' },
64 { "version", 0, 0, 'v' },
65 { "addr", 1, 0, 'a' },
66 { "lladdr", 1, 0, 'l' },
67 { "dev", 1, 0, 'd' },
68 { "family", 1, 0, ARG_FAMILY },
69 { "state", 1, 0, ARG_STATE },
70 { 0, 0, 0, 0 }
71 };
72
73 c = getopt_long(argc, argv, "f:hva:l:d:", long_opts, &optidx);
74 if (c == -1)
75 break;
76
77 switch (c) {
78 case 'f': params.dp_type = nl_cli_parse_dumptype(optarg); break;
79 case 'h': print_usage(); break;
80 case 'v': nl_cli_print_version(); break;
81 case 'a': nl_cli_neigh_parse_dst(neigh, optarg); break;
82 case 'l': nl_cli_neigh_parse_lladdr(neigh, optarg); break;
83 case 'd': nl_cli_neigh_parse_dev(neigh, link_cache, optarg); break;
84 case ARG_FAMILY: nl_cli_neigh_parse_family(neigh, optarg); break;
85 case ARG_STATE: nl_cli_neigh_parse_state(neigh, optarg); break;
86 }
87 }
88
89 nl_cache_dump_filter(neigh_cache, &params, OBJ_CAST(neigh));
90
91 rtnl_neigh_put(neigh);
92 nl_cache_put(neigh_cache);
93 nl_cache_put(link_cache);
94 nl_socket_free(sock);
95
96 return 0;
97 }
NL_DUMP_LINE
Dump object briefly on one line.
Definition: types.h:22
nl_dump_params::dp_type
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:38
nl_cache_dump_filter
void nl_cache_dump_filter(struct nl_cache *cache, struct nl_dump_params *params, struct nl_object *filter)
Dump all elements of a cache (filtered).
Definition: cache.c:1217
nl_socket_free
void nl_socket_free(struct nl_sock *sk)
Free a netlink socket.
Definition: socket.c:244
nl_dump_params
Dumping parameters.
Definition: types.h:33
NL_CACHE_AF_ITER
#define NL_CACHE_AF_ITER
Explicitely iterate over all address families when updating the cache.
Definition: cache.h:45