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-rw-r--r--examples/nfct-mnl-del.c81
1 files changed, 81 insertions, 0 deletions
diff --git a/examples/nfct-mnl-del.c b/examples/nfct-mnl-del.c
new file mode 100644
index 0000000..91ad9e4
--- /dev/null
+++ b/examples/nfct-mnl-del.c
@@ -0,0 +1,81 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <arpa/inet.h>
+
+#include <libmnl/libmnl.h>
+#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
+
+#include <linux/netfilter/nf_conntrack_tcp.h>
+
+int main(void)
+{
+ struct mnl_socket *nl;
+ struct nlmsghdr *nlh;
+ struct nfgenmsg *nfh;
+ char buf[MNL_SOCKET_BUFFER_SIZE];
+ unsigned int seq, portid;
+ struct nf_conntrack *ct;
+ int ret;
+
+ nl = mnl_socket_open(NETLINK_NETFILTER);
+ if (nl == NULL) {
+ perror("mnl_socket_open");
+ exit(EXIT_FAILURE);
+ }
+
+ if (mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID) < 0) {
+ perror("mnl_socket_bind");
+ exit(EXIT_FAILURE);
+ }
+ portid = mnl_socket_get_portid(nl);
+
+ nlh = mnl_nlmsg_put_header(buf);
+ nlh->nlmsg_type = (NFNL_SUBSYS_CTNETLINK << 8) | IPCTNL_MSG_CT_DELETE;
+ nlh->nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
+ nlh->nlmsg_seq = seq = time(NULL);
+
+ nfh = mnl_nlmsg_put_extra_header(nlh, sizeof(struct nfgenmsg));
+ nfh->nfgen_family = AF_INET;
+ nfh->version = NFNETLINK_V0;
+ nfh->res_id = 0;
+
+ ct = nfct_new();
+ if (ct == NULL) {
+ perror("nfct_new");
+ return 0;
+ }
+
+ nfct_set_attr_u8(ct, ATTR_L3PROTO, AF_INET);
+ nfct_set_attr_u32(ct, ATTR_IPV4_SRC, inet_addr("1.1.1.1"));
+ nfct_set_attr_u32(ct, ATTR_IPV4_DST, inet_addr("2.2.2.2"));
+
+ nfct_set_attr_u8(ct, ATTR_L4PROTO, IPPROTO_TCP);
+ nfct_set_attr_u16(ct, ATTR_PORT_SRC, htons(20));
+ nfct_set_attr_u16(ct, ATTR_PORT_DST, htons(10));
+
+ nfct_nlmsg_build(nlh, ct);
+
+ ret = mnl_socket_sendto(nl, nlh, nlh->nlmsg_len);
+ if (ret == -1) {
+ perror("mnl_socket_recvfrom");
+ exit(EXIT_FAILURE);
+ }
+
+ ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+ while (ret > 0) {
+ ret = mnl_cb_run(buf, ret, seq, portid, NULL, NULL);
+ if (ret <= MNL_CB_STOP)
+ break;
+ ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+ }
+ if (ret == -1) {
+ perror("mnl_socket_recvfrom");
+ exit(EXIT_FAILURE);
+ }
+
+ mnl_socket_close(nl);
+
+ return 0;
+}