libnl  3.5.0
nl-neigh-add.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * src/ nl-neigh-add.c Add a neighbour
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 int quiet = 0;
20 
21 static void print_usage(void)
22 {
23  printf(
24  "Usage: nl-neigh-add [OPTION]... NEIGHBOUR\n"
25  "\n"
26  "Options\n"
27  " --update-only Do not create neighbour, updates exclusively\n"
28  " --create-only Do not update neighbour if it exists already.\n"
29  " -q, --quiet Do not print informal notifications\n"
30  " -h, --help Show this help\n"
31  " -v, --version Show versioning information\n"
32  "\n"
33  "Neighbour Options\n"
34  " -a, --addr=ADDR Destination address of neighbour\n"
35  " -l, --lladdr=ADDR Link layer address of neighbour\n"
36  " -d, --dev=DEV Device the neighbour is connected to\n"
37  " --state=STATE Neighbour state, (default = permanent)\n"
38  "\n"
39  "Example\n"
40  " nl-neigh-add --create-only --addr=10.0.0.1 --dev=eth0 \\\n"
41  " --lladdr=AA:BB:CC:DD:EE:FF\n"
42  );
43 
44  exit(0);
45 }
46 
47 int main(int argc, char *argv[])
48 {
49  struct nl_sock *sock;
50  struct rtnl_neigh *neigh;
51  struct nl_cache *link_cache;
52  struct nl_dump_params dp = {
54  .dp_fd = stdout,
55  };
56  int err, ok = 0, nlflags = NLM_F_REPLACE | NLM_F_CREATE;
57 
58  sock = nl_cli_alloc_socket();
59  nl_cli_connect(sock, NETLINK_ROUTE);
60  link_cache = nl_cli_link_alloc_cache(sock);
61  neigh = nl_cli_neigh_alloc();
62 
63  for (;;) {
64  int c, optidx = 0;
65  enum {
66  ARG_UPDATE_ONLY = 257,
67  ARG_CREATE_ONLY = 258,
68  ARG_STATE,
69  };
70  static struct option long_opts[] = {
71  { "update-only", 0, 0, ARG_UPDATE_ONLY },
72  { "create-only", 0, 0, ARG_CREATE_ONLY },
73  { "quiet", 0, 0, 'q' },
74  { "help", 0, 0, 'h' },
75  { "version", 0, 0, 'v' },
76  { "addr", 1, 0, 'a' },
77  { "lladdr", 1, 0, 'l' },
78  { "dev", 1, 0, 'd' },
79  { "state", 1, 0, ARG_STATE },
80  { 0, 0, 0, 0 }
81  };
82 
83  c = getopt_long(argc, argv, "qhva:l:d:", long_opts, &optidx);
84  if (c == -1)
85  break;
86 
87  switch (c) {
88  case ARG_UPDATE_ONLY: nlflags &= ~NLM_F_CREATE; break;
89  case ARG_CREATE_ONLY: nlflags |= NLM_F_EXCL; break;
90  case 'q': quiet = 1; break;
91  case 'h': print_usage(); break;
92  case 'v': nl_cli_print_version(); break;
93  case 'a': ok++; nl_cli_neigh_parse_dst(neigh, optarg); break;
94  case 'l': nl_cli_neigh_parse_lladdr(neigh, optarg); break;
95  case 'd': nl_cli_neigh_parse_dev(neigh, link_cache, optarg); break;
96  case ARG_STATE: nl_cli_neigh_parse_state(neigh, optarg); break;
97  }
98  }
99 
100  if (!ok)
101  print_usage();
102 
103  if ((err = rtnl_neigh_add(sock, neigh, nlflags)) < 0)
104  nl_cli_fatal(err, "Unable to add neighbour: %s",
105  nl_geterror(err));
106 
107  if (!quiet) {
108  printf("Added ");
109  nl_object_dump(OBJ_CAST(neigh), &dp);
110  }
111 
112  return 0;
113 }
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
int rtnl_neigh_add(struct nl_sock *sk, struct rtnl_neigh *tmpl, int flags)
Add a new neighbour.
Definition: neigh.c:780
void nl_object_dump(struct nl_object *obj, struct nl_dump_params *params)
Dump this object according to the specified parameters.
Definition: object.c:289
void nl_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
Definition: utils.c:78
Dumping parameters.
Definition: types.h:33