16 #include <netinet/in.h>
18 #include <linux/netfilter.h>
19 #include <linux/netfilter/nf_tables.h>
20 #include <linux/netfilter/nfnetlink.h>
22 #include <libmnl/libmnl.h>
23 #include <libnftnl/rule.h>
25 static void nftnl_mnl_batch_put(
char *buf, uint16_t type, uint32_t seq)
30 nlh = mnl_nlmsg_put_header(buf);
31 nlh->nlmsg_type = type;
32 nlh->nlmsg_flags = NLM_F_REQUEST;
35 nfg = mnl_nlmsg_put_extra_header(nlh,
sizeof(*nfg));
36 nfg->nfgen_family = AF_INET;
37 nfg->version = NFNETLINK_V0;
38 nfg->res_id = NFNL_SUBSYS_NFTABLES;
41 int main(
int argc,
char *argv[])
43 struct mnl_socket *nl;
44 char buf[MNL_SOCKET_BUFFER_SIZE];
46 struct mnl_nlmsg_batch *batch;
51 if (argc < 4 || argc > 5) {
52 fprintf(stderr,
"Usage: %s <family> <table> <chain> [<handle>]\n",
57 r = nftnl_rule_alloc();
63 if (strcmp(argv[1],
"ip") == 0)
64 family = NFPROTO_IPV4;
65 else if (strcmp(argv[1],
"ip6") == 0)
66 family = NFPROTO_IPV6;
67 else if (strcmp(argv[1],
"bridge") == 0)
68 family = NFPROTO_BRIDGE;
69 else if (strcmp(argv[1],
"arp") == 0)
72 fprintf(stderr,
"Unknown family: ip, ip6, bridge, arp\n");
77 nftnl_rule_set(r, NFTNL_RULE_TABLE, argv[2]);
78 nftnl_rule_set(r, NFTNL_RULE_CHAIN, argv[3]);
82 nftnl_rule_set_u64(r, NFTNL_RULE_HANDLE, atoi(argv[4]));
84 batch = mnl_nlmsg_batch_start(buf,
sizeof(buf));
86 nftnl_mnl_batch_put(mnl_nlmsg_batch_current(batch),
87 NFNL_MSG_BATCH_BEGIN, seq++);
88 mnl_nlmsg_batch_next(batch);
90 nlh = nftnl_rule_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
95 nftnl_rule_nlmsg_build_payload(nlh, r);
97 mnl_nlmsg_batch_next(batch);
99 nftnl_mnl_batch_put(mnl_nlmsg_batch_current(batch), NFNL_MSG_BATCH_END,
101 mnl_nlmsg_batch_next(batch);
103 nl = mnl_socket_open(NETLINK_NETFILTER);
105 perror(
"mnl_socket_open");
109 if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
110 perror(
"mnl_socket_bind");
113 portid = mnl_socket_get_portid(nl);
115 if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
116 mnl_nlmsg_batch_size(batch)) < 0) {
117 perror(
"mnl_socket_send");
121 mnl_nlmsg_batch_stop(batch);
123 ret = mnl_socket_recvfrom(nl, buf,
sizeof(buf));
125 ret = mnl_cb_run(buf, ret, 0, portid, NULL, NULL);
128 ret = mnl_socket_recvfrom(nl, buf,
sizeof(buf));
134 mnl_socket_close(nl);