diff options
Diffstat (limited to 'examples')
-rw-r--r-- | examples/Makefile.am | 4 | ||||
-rw-r--r-- | examples/nft-table-upd.c | 102 |
2 files changed, 106 insertions, 0 deletions
diff --git a/examples/Makefile.am b/examples/Makefile.am index 9b9e345..aee95df 100644 --- a/examples/Makefile.am +++ b/examples/Makefile.am @@ -1,6 +1,7 @@ include $(top_srcdir)/Make_global.am check_PROGRAMS = nft-table-add \ + nft-table-upd \ nft-table-del \ nft-table-get \ nft-chain-add \ @@ -15,6 +16,9 @@ check_PROGRAMS = nft-table-add \ nft_table_add_SOURCES = nft-table-add.c nft_table_add_LDADD = ../src/libnftables.la ${LIBMNL_LIBS} +nft_table_upd_SOURCES = nft-table-upd.c +nft_table_upd_LDADD = ../src/libnftables.la ${LIBMNL_LIBS} + nft_table_del_SOURCES = nft-table-del.c nft_table_del_LDADD = ../src/libnftables.la ${LIBMNL_LIBS} diff --git a/examples/nft-table-upd.c b/examples/nft-table-upd.c new file mode 100644 index 0000000..6b938bf --- /dev/null +++ b/examples/nft-table-upd.c @@ -0,0 +1,102 @@ +/* + * (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/nf_tables.h> + +#include <libmnl/libmnl.h> +#include <libnftables/table.h> + +int main(int argc, char *argv[]) +{ + struct mnl_socket *nl; + char buf[MNL_SOCKET_BUFFER_SIZE]; + struct nlmsghdr *nlh; + uint32_t portid, seq, family, flags; + struct nft_table *t = NULL; + int ret; + + if (argc != 4) { + fprintf(stderr, "%s <family> <name> <state>\n", argv[0]); + exit(EXIT_FAILURE); + } + + t = nft_table_alloc(); + if (t == NULL) { + perror("OOM"); + exit(EXIT_FAILURE); + } + + seq = time(NULL); + if (strcmp(argv[1], "ip") == 0) + family = AF_INET; + else if (strcmp(argv[1], "ip6") == 0) + family = AF_INET6; + else if (strcmp(argv[1], "bridge") == 0) + family = AF_BRIDGE; + else { + fprintf(stderr, "Unknown family: ip, ip6, bridge\n"); + exit(EXIT_FAILURE); + } + + if (strcmp(argv[3], "active") == 0) + flags = 0; + else if (strcmp(argv[3], "dormant") == 0) + flags = NFT_TABLE_F_DORMANT; + else { + fprintf(stderr, "Unknown state: active, dormant\n"); + exit(EXIT_FAILURE); + } + + nft_table_attr_set(t, NFT_TABLE_ATTR_NAME, argv[2]); + nft_table_attr_set_u32(t, NFT_TABLE_ATTR_FLAGS, flags); + + nlh = nft_table_nlmsg_build_hdr(buf, NFT_MSG_NEWTABLE, family, + NLM_F_ACK, seq); + nft_table_nlmsg_build_payload(nlh, t); + nft_table_free(t); + + 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; +} |