13#include <netinet/in.h>
15#include <linux/netfilter.h>
16#include <linux/netfilter/nf_tables.h>
18#include <libmnl/libmnl.h>
19#include <libnftnl/object.h>
21static uint16_t parse_family(
char *str,
const char *option)
23 if (strcmp(str,
"ip") == 0)
25 else if (strcmp(str,
"ip6") == 0)
27 else if (strcmp(str,
"inet") == 0)
29 else if (strcmp(str,
"arp") == 0)
31 fprintf(stderr,
"Unknown %s: ip, ip6, inet, arp\n", option);
35static struct nftnl_obj *obj_parse(
int argc,
char *argv[])
40 t = nftnl_obj_alloc();
46 family = parse_family(argv[1],
"family");
47 nftnl_obj_set_u32(t, NFTNL_OBJ_FAMILY, family);
48 nftnl_obj_set_u32(t, NFTNL_OBJ_TYPE, NFT_OBJECT_CT_EXPECT);
49 nftnl_obj_set_str(t, NFTNL_OBJ_TABLE, argv[2]);
50 nftnl_obj_set_str(t, NFTNL_OBJ_NAME, argv[3]);
55int main(
int argc,
char *argv[])
57 struct mnl_socket *nl;
58 char buf[MNL_SOCKET_BUFFER_SIZE];
60 uint32_t portid, seq, obj_seq, family;
62 struct mnl_nlmsg_batch *batch;
66 fprintf(stderr,
"%s <family> <table> <name>\n", argv[0]);
70 t = obj_parse(argc, argv);
75 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 family = nftnl_obj_get_u32(t, NFTNL_OBJ_FAMILY);
82 nlh = nftnl_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
83 NFT_MSG_DELOBJ, family, NLM_F_ACK,
85 nftnl_obj_nlmsg_build_payload(nlh, t);
86 mnl_nlmsg_batch_next(batch);
89 nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++);
90 mnl_nlmsg_batch_next(batch);
92 nl = mnl_socket_open(NETLINK_NETFILTER);
94 perror(
"mnl_socket_open");
98 if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
99 perror(
"mnl_socket_bind");
102 portid = mnl_socket_get_portid(nl);
104 if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
105 mnl_nlmsg_batch_size(batch)) < 0) {
106 perror(
"mnl_socket_send");
110 mnl_nlmsg_batch_stop(batch);
112 ret = mnl_socket_recvfrom(nl, buf,
sizeof(buf));
114 ret = mnl_cb_run(buf, ret, obj_seq, portid, NULL, NULL);
117 ret = mnl_socket_recvfrom(nl, buf,
sizeof(buf));
123 mnl_socket_close(nl);