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 int main(
int argc,
char *argv[])
27 struct mnl_socket *nl;
28 char buf[MNL_SOCKET_BUFFER_SIZE];
30 struct mnl_nlmsg_batch *batch;
33 int ret, batching, family;
35 if (argc < 4 || argc > 5) {
36 fprintf(stderr,
"Usage: %s <family> <table> <chain> [<handle>]\n",
41 r = nftnl_rule_alloc();
47 if (strcmp(argv[1],
"ip") == 0)
48 family = NFPROTO_IPV4;
49 else if (strcmp(argv[1],
"ip6") == 0)
50 family = NFPROTO_IPV6;
51 else if (strcmp(argv[1],
"bridge") == 0)
52 family = NFPROTO_BRIDGE;
53 else if (strcmp(argv[1],
"arp") == 0)
56 fprintf(stderr,
"Unknown family: ip, ip6, bridge, arp\n");
61 nftnl_rule_set(r, NFTNL_RULE_TABLE, argv[2]);
62 nftnl_rule_set(r, NFTNL_RULE_CHAIN, argv[3]);
66 nftnl_rule_set_u64(r, NFTNL_RULE_HANDLE, atoi(argv[4]));
68 batching = nftnl_batch_is_supported();
70 perror(
"cannot talk to nfnetlink");
74 batch = mnl_nlmsg_batch_start(buf,
sizeof(buf));
77 nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++);
78 mnl_nlmsg_batch_next(batch);
81 nlh = nftnl_rule_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
86 nftnl_rule_nlmsg_build_payload(nlh, r);
88 mnl_nlmsg_batch_next(batch);
91 nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++);
92 mnl_nlmsg_batch_next(batch);
95 nl = mnl_socket_open(NETLINK_NETFILTER);
97 perror(
"mnl_socket_open");
101 if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
102 perror(
"mnl_socket_bind");
105 portid = mnl_socket_get_portid(nl);
107 if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
108 mnl_nlmsg_batch_size(batch)) < 0) {
109 perror(
"mnl_socket_send");
113 mnl_nlmsg_batch_stop(batch);
115 ret = mnl_socket_recvfrom(nl, buf,
sizeof(buf));
117 ret = mnl_cb_run(buf, ret, 0, portid, NULL, NULL);
120 ret = mnl_socket_recvfrom(nl, buf,
sizeof(buf));
126 mnl_socket_close(nl);