summaryrefslogtreecommitdiffstats
path: root/examples/nft-chain-parse-add.c
diff options
context:
space:
mode:
authorArturo Borrero <arturo.borrero.glez@gmail.com>2014-08-18 21:06:14 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2014-08-18 22:17:56 +0200
commit83694bec010c247a9d08124edde99ac9728e74a1 (patch)
treeb5bb89b91f6007829c9e353ca3be0705c2b73308 /examples/nft-chain-parse-add.c
parent3a5d8b38f288c2f59a4045983e0734498b932770 (diff)
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>
Diffstat (limited to 'examples/nft-chain-parse-add.c')
-rw-r--r--examples/nft-chain-parse-add.c149
1 files changed, 149 insertions, 0 deletions
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;
+}