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author | Arturo Borrero <arturo.borrero.glez@gmail.com> | 2014-09-23 13:15:21 +0200 |
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committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2014-09-23 15:49:06 +0200 |
commit | 0260882c83780243078538a5bb14033258326f79 (patch) | |
tree | 322a124adcbce6c5f119b73e4998c7416bd00f16 /examples/nft-rule-parse-add.c | |
parent | 2e66fb09d6936d17ab8240188f511529fcae8c67 (diff) |
examples: merge nft-rule-{xml|json}-add.c
Merge the two examples in just one. An input argument choose the format to use.
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-rule-parse-add.c')
-rw-r--r-- | examples/nft-rule-parse-add.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/examples/nft-rule-parse-add.c b/examples/nft-rule-parse-add.c new file mode 100644 index 0000000..8b6152a --- /dev/null +++ b/examples/nft-rule-parse-add.c @@ -0,0 +1,148 @@ +/* + * (C) 2013 by Pablo Neira Ayuso <pablo@netfilter.org> + * (C) 2013 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 <stddef.h> /* for offsetof */ +#include <netinet/in.h> +#include <arpa/inet.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/rule.h> + +static struct nft_rule *rule_parse_file(const char *file, uint16_t format) +{ + int fd; + struct nft_rule *r; + struct nft_parse_err *err; + char data[4096]; + + 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); + + r = nft_rule_alloc(); + if (r == NULL) { + perror("OOM"); + exit(EXIT_FAILURE); + } + + err = nft_parse_err_alloc(); + if (err == NULL) { + perror("error"); + exit(EXIT_FAILURE); + } + + if (nft_rule_parse(r, format, data, err) < 0) { + nft_parse_perror("Unable to parse file", err); + nft_parse_err_free(err); + nft_rule_free(r); + return NULL; + } + + nft_rule_attr_unset(r, NFT_RULE_ATTR_HANDLE); + + nft_parse_err_free(err); + return r; +} + +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_rule *r; + int ret; + uint16_t family, format, outformat; + + 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); + } + + r = rule_parse_file(argv[2], format); + if (r == NULL) + exit(EXIT_FAILURE); + + nft_rule_fprintf(stdout, r, outformat, 0); + fprintf(stdout, "\n"); + + family = nft_rule_attr_get_u32(r, NFT_RULE_ATTR_FAMILY); + + seq = time(NULL); + nlh = nft_rule_nlmsg_build_hdr(buf, NFT_MSG_NEWRULE, family, + NLM_F_CREATE|NLM_F_APPEND|NLM_F_ACK, + seq); + nft_rule_nlmsg_build_payload(nlh, r); + nft_rule_free(r); + + 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; +} |