libnftnl 1.2.9
nft-set-del.c
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org>
4 *
5 * This software has been sponsored by Sophos Astaro <http://www.sophos.com>
6 */
7
8#include <stdlib.h>
9#include <time.h>
10#include <string.h>
11#include <netinet/in.h>
12
13#include <linux/netfilter.h>
14#include <linux/netfilter/nf_tables.h>
15
16#include <libmnl/libmnl.h>
17#include <libnftnl/set.h>
18
19int main(int argc, char *argv[])
20{
21 struct mnl_socket *nl;
22 char buf[MNL_SOCKET_BUFFER_SIZE];
23 struct nlmsghdr *nlh;
24 struct mnl_nlmsg_batch *batch;
25 uint32_t portid, seq, family;
26 struct nftnl_set *t = NULL;
27 int ret;
28
29 if (argc != 4) {
30 fprintf(stderr, "%s <family> <table> <set>\n", argv[0]);
31 exit(EXIT_FAILURE);
32 }
33
34 t = nftnl_set_alloc();
35 if (t == NULL) {
36 perror("OOM");
37 exit(EXIT_FAILURE);
38 }
39
40 seq = time(NULL);
41 if (strcmp(argv[1], "ip") == 0)
42 family = NFPROTO_IPV4;
43 else if (strcmp(argv[1], "ip6") == 0)
44 family = NFPROTO_IPV6;
45 else if (strcmp(argv[1], "inet") == 0)
46 family = NFPROTO_INET;
47 else if (strcmp(argv[1], "bridge") == 0)
48 family = NFPROTO_BRIDGE;
49 else if (strcmp(argv[1], "arp") == 0)
50 family = NFPROTO_ARP;
51 else {
52 fprintf(stderr, "Unknown family: ip, ip6, inet, bridge, arp\n");
53 exit(EXIT_FAILURE);
54 }
55
56 batch = mnl_nlmsg_batch_start(buf, sizeof(buf));
57
58 nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++);
59 mnl_nlmsg_batch_next(batch);
60
61 nlh = nftnl_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
62 NFT_MSG_DELSET, family, NLM_F_ACK, seq);
63 nftnl_set_set_str(t, NFTNL_SET_TABLE, argv[2]);
64 nftnl_set_set_str(t, NFTNL_SET_NAME, argv[3]);
65
66 nftnl_set_nlmsg_build_payload(nlh, t);
67 nftnl_set_free(t);
68 mnl_nlmsg_batch_next(batch);
69
70 nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++);
71 mnl_nlmsg_batch_next(batch);
72
73 nl = mnl_socket_open(NETLINK_NETFILTER);
74 if (nl == NULL) {
75 perror("mnl_socket_open");
76 exit(EXIT_FAILURE);
77 }
78
79 if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
80 perror("mnl_socket_bind");
81 exit(EXIT_FAILURE);
82 }
83 portid = mnl_socket_get_portid(nl);
84
85 ret = mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
86 mnl_nlmsg_batch_size(batch));
87 if (ret < 0) {
88 perror("mnl_socket_send");
89 exit(EXIT_FAILURE);
90 }
91
92 mnl_nlmsg_batch_stop(batch);
93
94 ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
95 while (ret < 0) {
96 perror("mnl_socket_recvfrom");
97 exit(EXIT_FAILURE);
98 }
99
100 ret = mnl_cb_run(buf, ret, 0, portid, NULL, NULL);
101 if (ret < 0) {
102 perror("mnl_cb_run");
103 exit(EXIT_FAILURE);
104 }
105 mnl_socket_close(nl);
106
107 return EXIT_SUCCESS;
108}