1 files changed, 124 insertions, 0 deletions
diff --git a/examples/nft-chain-del.c b/examples/nft-chain-del.c
new file mode 100644
index 0000000..3cd483e
--- /dev/null
+++ b/examples/nft-chain-del.c
@@ -0,0 +1,124 @@
+/*
+ * (C) 2012 by Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This software has been sponsored by Sophos Astaro <http://www.sophos.com>
+ */
+
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <netinet/in.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_tables.h>
+
+#include <libmnl/libmnl.h>
+#include <libnftnl/chain.h>
+
+static struct nftnl_chain *chain_del_parse(int argc, char *argv[])
+{
+	struct nftnl_chain *t;
+
+	t = nftnl_chain_alloc();
+	if (t == NULL) {
+		perror("OOM");
+		return NULL;
+	}
+
+	nftnl_chain_set_str(t, NFTNL_CHAIN_TABLE, argv[2]);
+	nftnl_chain_set_str(t, NFTNL_CHAIN_NAME, argv[3]);
+
+	return t;
+}
+
+int main(int argc, char *argv[])
+{
+	struct mnl_socket *nl;
+	struct mnl_nlmsg_batch *batch;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	struct nlmsghdr *nlh;
+	uint32_t portid, seq, chain_seq;
+	struct nftnl_chain *t;
+	int ret, family;
+
+	if (argc != 4) {
+		fprintf(stderr, "Usage: %s <family> <table> <chain>\n",
+			argv[0]);
+		exit(EXIT_FAILURE);
+	}
+
+	if (strcmp(argv[1], "ip") == 0)
+		family = NFPROTO_IPV4;
+	else if (strcmp(argv[1], "ip6") == 0)
+		family = NFPROTO_IPV6;
+	else if (strcmp(argv[1], "inet") == 0)
+		family = NFPROTO_INET;
+	else if (strcmp(argv[1], "bridge") == 0)
+		family = NFPROTO_BRIDGE;
+	else if (strcmp(argv[1], "arp") == 0)
+		family = NFPROTO_ARP;
+	else {
+		fprintf(stderr, "Unknown family: ip, ip6, inet, bridge, arp\n");
+		exit(EXIT_FAILURE);
+	}
+
+	t = chain_del_parse(argc, argv);
+	if (t == NULL)
+		exit(EXIT_FAILURE);
+
+	seq = time(NULL);
+	batch = mnl_nlmsg_batch_start(buf, sizeof(buf));
+
+	nftnl_batch_begin(mnl_nlmsg_batch_current(batch), seq++);
+	mnl_nlmsg_batch_next(batch);
+
+	chain_seq = seq;
+	nlh = nftnl_nlmsg_build_hdr(mnl_nlmsg_batch_current(batch),
+				    NFT_MSG_DELCHAIN, family, NLM_F_ACK, seq++);
+	nftnl_chain_nlmsg_build_payload(nlh, t);
+	nftnl_chain_free(t);
+	mnl_nlmsg_batch_next(batch);
+
+	nftnl_batch_end(mnl_nlmsg_batch_current(batch), seq++);
+	mnl_nlmsg_batch_next(batch);
+
+	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);
+
+	if (mnl_socket_sendto(nl, mnl_nlmsg_batch_head(batch),
+			      mnl_nlmsg_batch_size(batch)) < 0) {
+		perror("mnl_socket_send");
+		exit(EXIT_FAILURE);
+	}
+
+	mnl_nlmsg_batch_stop(batch);
+
+	ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	while (ret > 0) {
+		ret = mnl_cb_run(buf, ret, chain_seq, portid, NULL, NULL);
+		if (ret <= 0)
+			break;
+		ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	}
+	if (ret == -1) {
+		perror("error");
+		exit(EXIT_FAILURE);
+	}
+	mnl_socket_close(nl);
+
+	return EXIT_SUCCESS;
+}