libnl  3.7.0
nl-link-list.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * Copyright (c) 2003-2010 Thomas Graf <tgraf@suug.ch>
4  */
5 
6 #include <netlink/cli/utils.h>
7 #include <netlink/cli/link.h>
8 
9 #include <linux/netlink.h>
10 
11 static void print_usage(void)
12 {
13  printf(
14 "Usage: nl-link-list [OPTIONS]... \n"
15 "\n"
16 "OPTIONS\n"
17 " --details Show detailed information of each link\n"
18 " --stats Show statistics, implies --details\n"
19 " -h, --help Show this help text.\n"
20 " -v, --version Show versioning information.\n"
21 "\n"
22 " -n, --name=NAME Name of link\n"
23 " -i, --index Interface index (unique identifier)\n"
24 " --family=NAME Link address family\n"
25 " --mtu=NUM MTU value\n"
26 " --txqlen=NUM TX queue length\n"
27 " --weight=NUM Weight\n"
28  );
29  exit(0);
30 }
31 
32 int main(int argc, char *argv[])
33 {
34  struct nl_sock *sock;
35  struct nl_cache *link_cache;
36  struct rtnl_link *link;
37  struct nl_dump_params params = {
39  .dp_fd = stdout,
40  };
41 
42  sock = nl_cli_alloc_socket();
43  nl_cli_connect(sock, NETLINK_ROUTE);
44  link = nl_cli_link_alloc();
45 
46  for (;;) {
47  int c, optidx = 0;
48  enum {
49  ARG_FAMILY = 257,
50  ARG_MTU = 258,
51  ARG_TXQLEN,
52  ARG_WEIGHT,
53  ARG_DETAILS,
54  ARG_STATS,
55  };
56  static struct option long_opts[] = {
57  { "details", 0, 0, ARG_DETAILS },
58  { "stats", 0, 0, ARG_STATS },
59  { "help", 0, 0, 'h' },
60  { "version", 0, 0, 'v' },
61  { "name", 1, 0, 'n' },
62  { "index", 1, 0, 'i' },
63  { "family", 1, 0, ARG_FAMILY },
64  { "mtu", 1, 0, ARG_MTU },
65  { "txqlen", 1, 0, ARG_TXQLEN },
66  { "weight", 1, 0, ARG_WEIGHT },
67  { 0, 0, 0, 0 }
68  };
69 
70  c = getopt_long(argc, argv, "hvn:i:", long_opts, &optidx);
71  if (c == -1)
72  break;
73 
74  switch (c) {
75  case ARG_DETAILS: params.dp_type = NL_DUMP_DETAILS; break;
76  case ARG_STATS: params.dp_type = NL_DUMP_STATS; break;
77  case 'h': print_usage(); break;
78  case 'v': nl_cli_print_version(); break;
79  case 'n': nl_cli_link_parse_name(link, optarg); break;
80  case 'i': nl_cli_link_parse_ifindex(link, optarg); break;
81  case ARG_FAMILY: nl_cli_link_parse_family(link, optarg); break;
82  case ARG_MTU: nl_cli_link_parse_mtu(link, optarg); break;
83  case ARG_TXQLEN: nl_cli_link_parse_txqlen(link, optarg); break;
84  case ARG_WEIGHT: nl_cli_link_parse_weight(link, optarg); break;
85  }
86  }
87 
88  link_cache = nl_cli_link_alloc_cache_family(sock,
89  rtnl_link_get_family(link));
90 
91  nl_cache_dump_filter(link_cache, &params, OBJ_CAST(link));
92 
93  return 0;
94 }
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:1211
@ NL_DUMP_STATS
Dump all attributes including statistics.
Definition: types.h:18
@ NL_DUMP_LINE
Dump object briefly on one line.
Definition: types.h:16
@ NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition: types.h:17
Dumping parameters.
Definition: types.h:28
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:32