1 files changed, 87 insertions, 0 deletions
diff --git a/examples/nfexp-mnl-dump.c b/examples/nfexp-mnl-dump.c
new file mode 100644
index 0000000..b44c7d8
--- /dev/null
+++ b/examples/nfexp-mnl-dump.c
@@ -0,0 +1,87 @@
+#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>
+
+static int data_cb(const struct nlmsghdr *nlh, void *data)
+{
+	struct nf_expect *exp;
+	uint32_t type = NFCT_T_UNKNOWN;
+	char buf[4096];
+
+	exp = nfexp_new();
+	if (exp == NULL)
+		return MNL_CB_OK;
+
+	if (nfexp_nlmsg_parse(nlh, exp) < 0) {
+		perror("failed to parse message from kernel");
+		return MNL_CB_ERROR;
+	}
+
+	nfexp_snprintf(buf, sizeof(buf), exp, type, NFCT_O_DEFAULT, 0);
+	printf("%s\n", buf);
+
+	nfexp_destroy(exp);
+
+	return MNL_CB_OK;
+}
+
+int main(void)
+{
+	struct mnl_socket *nl;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	struct nlmsghdr *nlh;
+	struct nfgenmsg *nfh;
+	uint32_t seq, portid;
+	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_EXP << 8) | IPCTNL_MSG_EXP_GET;
+	nlh->nlmsg_flags = NLM_F_REQUEST|NLM_F_DUMP|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;
+
+	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 (1) {
+		ret = mnl_cb_run(buf, ret, seq, portid, data_cb, 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;
+}