libnftnl 1.2.3
nft-set-del.c
1/*
2 * (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This software has been sponsored by Sophos Astaro <http://www.sophos.com>
10 */
11
12#include <stdlib.h>
13#include <time.h>
14#include <string.h>
15#include <netinet/in.h>
16
17#include <linux/netfilter.h>
18#include <linux/netfilter/nf_tables.h>
19
20#include <libmnl/libmnl.h>
21#include <libnftnl/set.h>
22
23int main(int argc, char *argv[])
24{
25 struct mnl_socket *nl;
26 char buf[MNL_SOCKET_BUFFER_SIZE];
27 struct nlmsghdr *nlh;
28 struct mnl_nlmsg_batch *batch;
29 uint32_t portid, seq, family;
30 struct nftnl_set *t = NULL;
31 int ret;
32
33 if (argc != 4) {
34 fprintf(stderr, "%s <family> <table> <set>\n", argv[0]);
35 exit(EXIT_FAILURE);
36 }
37
38 t = nftnl_set_alloc();
39 if (t == NULL) {
40 perror("OOM");
41 exit(EXIT_FAILURE);
42 }
43
44 seq = time(NULL);
45 if (strcmp(argv[1], "ip") == 0)
46 family = NFPROTO_IPV4;
47 else if (strcmp(argv[1], "ip6") == 0)
48 family = NFPROTO_IPV6;
49 else if (strcmp(argv[1], "inet") == 0)
50 family = NFPROTO_INET;
51 else if (strcmp(argv[1], "bridge") == 0)
52 family = NFPROTO_BRIDGE;
53 else if (strcmp(argv[1], "arp") == 0)
54 family = NFPROTO_ARP;
55 else {
56 fprintf(stderr, "Unknown family: ip, ip6, inet, bridge, arp\n");
57 exit(EXIT_FAILURE);
58 }
59
60 batch = mnl_nlmsg_batch_start(buf, sizeof(buf));
61
62 nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++);
63 mnl_nlmsg_batch_next(batch);
64
65 nlh = nftnl_set_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
66 NFT_MSG_DELSET, family,
67 NLM_F_ACK, seq);
68 nftnl_set_set_str(t, NFTNL_SET_TABLE, argv[2]);
69 nftnl_set_set_str(t, NFTNL_SET_NAME, argv[3]);
70
71 nftnl_set_nlmsg_build_payload(nlh, t);
72 nftnl_set_free(t);
73 mnl_nlmsg_batch_next(batch);
74
75 nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++);
76 mnl_nlmsg_batch_next(batch);
77
78 nl = mnl_socket_open(NETLINK_NETFILTER);
79 if (nl == NULL) {
80 perror("mnl_socket_open");
81 exit(EXIT_FAILURE);
82 }
83
84 if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
85 perror("mnl_socket_bind");
86 exit(EXIT_FAILURE);
87 }
88 portid = mnl_socket_get_portid(nl);
89
90 ret = mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
91 mnl_nlmsg_batch_size(batch));
92 if (ret < 0) {
93 perror("mnl_socket_send");
94 exit(EXIT_FAILURE);
95 }
96
97 mnl_nlmsg_batch_stop(batch);
98
99 ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
100 while (ret < 0) {
101 perror("mnl_socket_recvfrom");
102 exit(EXIT_FAILURE);
103 }
104
105 ret = mnl_cb_run(buf, ret, 0, portid, NULL, NULL);
106 if (ret < 0) {
107 perror("mnl_cb_run");
108 exit(EXIT_FAILURE);
109 }
110 mnl_socket_close(nl);
111
112 return EXIT_SUCCESS;
113}