From d5e1f43e14bff7072e5a7a232bb2b04fcd710d52 Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Wed, 14 Nov 2012 16:20:15 +0100
Subject: examples: add connlabel dump/set/clear demo programs

Signed-off-by: Florian Westphal <fw@strlen.de>
---
 examples/nfct-mnl-dump-labels.c | 103 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 examples/nfct-mnl-dump-labels.c

(limited to 'examples/nfct-mnl-dump-labels.c')

diff --git a/examples/nfct-mnl-dump-labels.c b/examples/nfct-mnl-dump-labels.c
new file mode 100644
index 0000000..98df430
--- /dev/null
+++ b/examples/nfct-mnl-dump-labels.c
@@ -0,0 +1,103 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include <libmnl/libmnl.h>
+#include <libnetfilter_conntrack/libnetfilter_conntrack.h>
+
+static void print_label(struct nf_conntrack *ct, struct nfct_labelmap *map)
+{
+	unsigned int i, max;
+	const struct nfct_bitmask *b = nfct_get_attr(ct, ATTR_CONNLABELS);
+	if (!b)
+		return;
+
+	puts("labels:");
+	max = nfct_bitmask_maxbit(b);
+	for (i = 0; i <= max; i++) {
+		if (nfct_bitmask_test_bit(b, i))
+			printf("\t'%s' (%d)\n", map ? nfct_labelmap_get_name(map, i) : "", i);
+	}
+}
+
+static int data_cb(const struct nlmsghdr *nlh, void *data)
+{
+	struct nf_conntrack *ct;
+	char buf[4096];
+
+	ct = nfct_new();
+	if (ct == NULL)
+		return MNL_CB_OK;
+
+	nfct_nlmsg_parse(nlh, ct);
+
+	nfct_snprintf(buf, sizeof(buf), ct, NFCT_T_UNKNOWN, NFCT_O_DEFAULT, 0);
+	printf("%s\n", buf);
+
+	print_label(ct, data);
+
+	nfct_destroy(ct);
+
+	return MNL_CB_OK;
+}
+
+int main(void)
+{
+	struct mnl_socket *nl;
+	struct nlmsghdr *nlh;
+	struct nfgenmsg *nfh;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	unsigned int seq, portid;
+	int ret;
+	struct nfct_labelmap *l = nfct_labelmap_new(NULL);
+
+	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_GET;
+	nlh->nlmsg_flags = NLM_F_REQUEST|NLM_F_DUMP;
+	nlh->nlmsg_seq = seq = time(NULL);
+
+	nfh = mnl_nlmsg_put_extra_header(nlh, sizeof(struct nfgenmsg));
+	nfh->nfgen_family = AF_UNSPEC;
+	nfh->version = NFNETLINK_V0;
+	nfh->res_id = 0;
+
+
+	ret = mnl_socket_sendto(nl, nlh, nlh->nlmsg_len);
+	if (ret == -1) {
+		perror("mnl_socket_sendto");
+		exit(EXIT_FAILURE);
+	}
+
+	ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+
+
+	while (ret > 0) {
+		ret = mnl_cb_run(buf, ret, seq, portid, data_cb, l);
+		if (ret <= MNL_CB_STOP)
+			break;
+		ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	}
+	if (ret == -1) {
+		perror("mnl_socket_recvfrom");
+		exit(EXIT_FAILURE);
+	}
+
+	if (l)
+		nfct_labelmap_destroy(l);
+
+	mnl_socket_close(nl);
+
+	return 0;
+}
-- 
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