15 #include <netinet/in.h>
17 #include <linux/netfilter.h>
18 #include <linux/netfilter/nf_tables.h>
20 #include <libmnl/libmnl.h>
21 #include <libnftnl/table.h>
23 int main(
int argc,
char *argv[])
25 struct mnl_socket *nl;
26 char buf[MNL_SOCKET_BUFFER_SIZE];
28 uint32_t portid, seq, table_seq, family, flags;
30 struct mnl_nlmsg_batch *batch;
34 fprintf(stderr,
"%s <family> <name> <state>\n", argv[0]);
38 t = nftnl_table_alloc();
44 batching = nftnl_batch_is_supported();
46 perror(
"cannot talk to nfnetlink");
51 batch = mnl_nlmsg_batch_start(buf,
sizeof(buf));
54 nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++);
55 mnl_nlmsg_batch_next(batch);
58 if (strcmp(argv[1],
"ip") == 0)
59 family = NFPROTO_IPV4;
60 else if (strcmp(argv[1],
"ip6") == 0)
61 family = NFPROTO_IPV6;
62 else if (strcmp(argv[1],
"bridge") == 0)
63 family = NFPROTO_BRIDGE;
64 else if (strcmp(argv[1],
"arp") == 0)
66 else if (strcmp(argv[1],
"netdev") == 0)
67 family = NFPROTO_NETDEV;
70 "Unknown family: ip, ip6, bridge, arp, netdev\n");
74 if (strcmp(argv[3],
"active") == 0)
76 else if (strcmp(argv[3],
"dormant") == 0)
77 flags = NFT_TABLE_F_DORMANT;
79 fprintf(stderr,
"Unknown state: active, dormant\n");
83 nftnl_table_set(t, NFTNL_TABLE_NAME, argv[2]);
84 nftnl_table_set_u32(t, NFTNL_TABLE_FLAGS, flags);
87 nlh = nftnl_table_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
88 NFT_MSG_NEWTABLE, family,
90 nftnl_table_nlmsg_build_payload(nlh, t);
92 mnl_nlmsg_batch_next(batch);
95 nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++);
96 mnl_nlmsg_batch_next(batch);
99 nl = mnl_socket_open(NETLINK_NETFILTER);
101 perror(
"mnl_socket_open");
105 if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
106 perror(
"mnl_socket_bind");
109 portid = mnl_socket_get_portid(nl);
111 if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
112 mnl_nlmsg_batch_size(batch)) < 0) {
113 perror(
"mnl_socket_send");
117 mnl_nlmsg_batch_stop(batch);
119 ret = mnl_socket_recvfrom(nl, buf,
sizeof(buf));
121 ret = mnl_cb_run(buf, ret, table_seq, portid, NULL, NULL);
124 ret = mnl_socket_recvfrom(nl, buf,
sizeof(buf));
130 mnl_socket_close(nl);