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 = {
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 }
Dump object briefly on one line.
Definition: types.h:22
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:38
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
void nl_socket_free(struct nl_sock *sk)
Free a netlink socket.
Definition: socket.c:244
Dumping parameters.
Definition: types.h:33
#define NL_CACHE_AF_ITER
Explicitely iterate over all address families when updating the cache.
Definition: cache.h:45