From 83694bec010c247a9d08124edde99ac9728e74a1 Mon Sep 17 00:00:00 2001
From: Arturo Borrero <arturo.borrero.glez@gmail.com>
Date: Mon, 18 Aug 2014 21:06:14 +0200
Subject: examples: merge nft-chain-{xml|json}-add.c

Merge the two examples in one. Use an input argument to choose the
format to parse.

Signed-off-by: Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 examples/nft-chain-parse-add.c | 149 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 examples/nft-chain-parse-add.c

(limited to 'examples/nft-chain-parse-add.c')

diff --git a/examples/nft-chain-parse-add.c b/examples/nft-chain-parse-add.c
new file mode 100644
index 0000000..01696ad
--- /dev/null
+++ b/examples/nft-chain-parse-add.c
@@ -0,0 +1,149 @@
+/*
+ * (C) 2013 by Pablo Neira Ayuso <pablo@netfilter.org>
+ * (C) 2014 by Arturo Borrero Gonzalez <arturo.borrero.glez@gmail.com>
+ *
+ * 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 code has been sponsored by Sophos Astaro <http://www.sophos.com>
+ */
+
+#include <stdlib.h>
+#include <time.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_tables.h>
+
+#include <libmnl/libmnl.h>
+#include <libnftnl/chain.h>
+#include <libnftnl/rule.h>
+
+static struct nft_chain *chain_parse_file(const char *file, uint16_t format)
+{
+	int fd;
+	struct nft_chain *c;
+	struct nft_parse_err *err;
+	char data[4096];
+
+	c = nft_chain_alloc();
+	if (c == NULL) {
+		perror("OOM");
+		return NULL;
+	}
+
+	fd = open(file, O_RDONLY);
+	if (fd < 0) {
+		perror("open");
+		return NULL;
+	}
+
+	if (read(fd, data, sizeof(data)) < 0) {
+		perror("read");
+		close(fd);
+		return NULL;
+	}
+
+	close(fd);
+
+	err = nft_parse_err_alloc();
+	if (err == NULL) {
+		perror("OOM");
+		return NULL;
+	}
+
+	if (nft_chain_parse(c, format, data, err) < 0) {
+		nft_parse_perror("Unable to parse file", err);
+		nft_parse_err_free(err);
+		return NULL;
+	}
+
+	nft_parse_err_free(err);
+	return c;
+}
+
+int main(int argc, char *argv[])
+{
+	struct mnl_socket *nl;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	struct nlmsghdr *nlh;
+	uint32_t portid, seq;
+	struct nft_chain *c;
+	uint16_t family, format, outformat;
+	int ret;
+
+	if (argc < 3) {
+		printf("Usage: %s {xml|json} <file>\n", argv[0]);
+		exit(EXIT_FAILURE);
+	}
+
+	if (strcmp(argv[1], "xml") == 0) {
+		format = NFT_PARSE_XML;
+		outformat = NFT_OUTPUT_XML;
+	} else if (strcmp(argv[1], "json") == 0) {
+		format = NFT_PARSE_JSON;
+		outformat = NFT_OUTPUT_JSON;
+	} else {
+		printf("Unknown format: xml, json\n");
+		exit(EXIT_FAILURE);
+	}
+
+	c = chain_parse_file(argv[2], format);
+	if (c == NULL)
+		exit(EXIT_FAILURE);
+
+	nft_chain_fprintf(stdout, c, outformat, 0);
+	fprintf(stdout, "\n");
+
+	nft_chain_attr_unset(c, NFT_CHAIN_ATTR_HANDLE);
+	family = nft_chain_attr_get_u32(c, NFT_CHAIN_ATTR_FAMILY);
+
+	seq = time(NULL);
+	nlh = nft_chain_nlmsg_build_hdr(buf, NFT_MSG_NEWCHAIN, family,
+					NLM_F_CREATE|NLM_F_ACK, seq);
+	nft_chain_nlmsg_build_payload(nlh, c);
+
+	nft_chain_free(c);
+
+	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, nlh, nlh->nlmsg_len) < 0) {
+		perror("mnl_socket_send");
+		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 <= 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;
+}
-- 
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