11#include <linux/netfilter.h>
12#include <linux/netfilter/nf_tables.h>
14#include <libmnl/libmnl.h>
15#include <libnftnl/object.h>
17static uint16_t parse_family(
char *str,
const char *option)
19 if (strcmp(str,
"ip") == 0)
21 else if (strcmp(str,
"ip6") == 0)
23 else if (strcmp(str,
"inet") == 0)
25 else if (strcmp(str,
"arp") == 0)
27 fprintf(stderr,
"Unknown %s: ip, ip6, inet, arp\n", option);
31static struct nftnl_obj *obj_parse(
int argc,
char *argv[])
36 t = nftnl_obj_alloc();
42 family = parse_family(argv[1],
"family");
43 nftnl_obj_set_u32(t, NFTNL_OBJ_FAMILY, family);
44 nftnl_obj_set_u32(t, NFTNL_OBJ_TYPE, NFT_OBJECT_CT_EXPECT);
45 nftnl_obj_set_str(t, NFTNL_OBJ_TABLE, argv[2]);
46 nftnl_obj_set_str(t, NFTNL_OBJ_NAME, argv[3]);
51int main(
int argc,
char *argv[])
53 struct mnl_socket *nl;
54 char buf[MNL_SOCKET_BUFFER_SIZE];
56 uint32_t portid, seq, obj_seq, family;
58 struct mnl_nlmsg_batch *batch;
62 fprintf(stderr,
"%s <family> <table> <name>\n", argv[0]);
66 t = obj_parse(argc, argv);
71 batch = mnl_nlmsg_batch_start(buf,
sizeof(buf));
73 nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++);
74 mnl_nlmsg_batch_next(batch);
77 family = nftnl_obj_get_u32(t, NFTNL_OBJ_FAMILY);
78 nlh = nftnl_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
79 NFT_MSG_DELOBJ, family, NLM_F_ACK,
81 nftnl_obj_nlmsg_build_payload(nlh, t);
82 mnl_nlmsg_batch_next(batch);
85 nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++);
86 mnl_nlmsg_batch_next(batch);
88 nl = mnl_socket_open(NETLINK_NETFILTER);
90 perror(
"mnl_socket_open");
94 if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
95 perror(
"mnl_socket_bind");
98 portid = mnl_socket_get_portid(nl);
100 if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
101 mnl_nlmsg_batch_size(batch)) < 0) {
102 perror(
"mnl_socket_send");
106 mnl_nlmsg_batch_stop(batch);
108 ret = mnl_socket_recvfrom(nl, buf,
sizeof(buf));
110 ret = mnl_cb_run(buf, ret, obj_seq, portid, NULL, NULL);
113 ret = mnl_socket_recvfrom(nl, buf,
sizeof(buf));
119 mnl_socket_close(nl);