libnl  3.5.0
nl-neigh-delete.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * src/nl-neigh-delete.c Delete 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, default_yes = 0, deleted = 0, interactive = 0;
20 static struct nl_sock *sock;
21 
22 static void print_usage(void)
23 {
24  printf(
25  "Usage: nl-neigh-delete [OPTION]... [NEIGHBOUR]\n"
26  "\n"
27  "Options\n"
28  " -i, --interactive Run interactively\n"
29  " --yes Set default answer to yes\n"
30  " -q, --quiet Do not print informal notifications\n"
31  " -h, --help Show this help\n"
32  " -v, --version Show versioning information\n"
33  "\n"
34  "Neighbour Options\n"
35  " -a, --addr=ADDR Destination address of neighbour\n"
36  " -l, --lladdr=ADDR Link layer address of neighbour\n"
37  " -d, --dev=DEV Device the neighbour is connected to\n"
38  " --family=FAMILY Destination address family\n"
39  " --state=STATE Neighbour state, (default = permanent)\n"
40  );
41 
42  exit(0);
43 }
44 
45 static void delete_cb(struct nl_object *obj, void *arg)
46 {
47  struct rtnl_neigh *neigh = nl_object_priv(obj);
48  struct nl_dump_params params = {
50  .dp_fd = stdout,
51  };
52  int err;
53 
54  if (interactive && !nl_cli_confirm(obj, &params, default_yes))
55  return;
56 
57  if ((err = rtnl_neigh_delete(sock, neigh, 0)) < 0)
58  nl_cli_fatal(err, "Unable to delete neighbour: %s\n",
59  nl_geterror(err));
60 
61  if (!quiet) {
62  printf("Deleted ");
63  nl_object_dump(obj, &params);
64  }
65 
66  deleted++;
67 }
68 
69 int main(int argc, char *argv[])
70 {
71  struct rtnl_neigh *neigh;
72  struct nl_cache *link_cache, *neigh_cache;
73 
74  sock = nl_cli_alloc_socket();
75  nl_cli_connect(sock, NETLINK_ROUTE);
76  link_cache = nl_cli_link_alloc_cache(sock);
77  neigh_cache = nl_cli_neigh_alloc_cache(sock);
78  neigh = nl_cli_neigh_alloc();
79 
80  for (;;) {
81  int c, optidx = 0;
82  enum {
83  ARG_FAMILY = 257,
84  ARG_STATE = 258,
85  ARG_YES,
86  };
87  static struct option long_opts[] = {
88  { "interactive", 0, 0, 'i' },
89  { "yes", 0, 0, ARG_YES },
90  { "quiet", 0, 0, 'q' },
91  { "help", 0, 0, 'h' },
92  { "version", 0, 0, 'v' },
93  { "addr", 1, 0, 'a' },
94  { "lladdr", 1, 0, 'l' },
95  { "dev", 1, 0, 'd' },
96  { "family", 1, 0, ARG_FAMILY },
97  { "state", 1, 0, ARG_STATE },
98  { 0, 0, 0, 0 }
99  };
100 
101  c = getopt_long(argc, argv, "qhva:l:d:", long_opts, &optidx);
102  if (c == -1)
103  break;
104 
105  switch (c) {
106  case 'i': interactive = 1; break;
107  case ARG_YES: default_yes = 1; break;
108  case 'q': quiet = 1; break;
109  case 'h': print_usage(); break;
110  case 'v': nl_cli_print_version(); break;
111  case 'a': nl_cli_neigh_parse_dst(neigh, optarg); break;
112  case 'l': nl_cli_neigh_parse_lladdr(neigh, optarg); break;
113  case 'd': nl_cli_neigh_parse_dev(neigh, link_cache, optarg); break;
114  case ARG_FAMILY: nl_cli_neigh_parse_family(neigh, optarg); break;
115  case ARG_STATE: nl_cli_neigh_parse_state(neigh, optarg); break;
116  }
117  }
118 
119  nl_cache_foreach_filter(neigh_cache, OBJ_CAST(neigh), delete_cb, NULL);
120 
121  if (!quiet)
122  printf("Deleted %d neighbours\n", deleted);
123 
124  return 0;
125 }
Dump object briefly on one line.
Definition: types.h:22
int rtnl_neigh_delete(struct nl_sock *sk, struct rtnl_neigh *neigh, int flags)
Delete a neighbour.
Definition: neigh.c:835
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:38
void nl_cache_foreach_filter(struct nl_cache *cache, struct nl_object *filter, void(*cb)(struct nl_object *, void *), void *arg)
Call a callback on each element of the cache (filtered).
Definition: cache.c:1283
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