From 726031795f23a69f104cba0e8a9dfacf2d4f698a Mon Sep 17 00:00:00 2001 From: Yang Zheng Date: Tue, 20 Mar 2018 22:53:22 +0800 Subject: examples: add nft-ct-helper-{add,get,del} nft-ct-helper-{add,get,del}: add, get, or delete ct helper objects from the specified table. Examples: % ./nft-ct-helper-get ip filter % ./nft-ct-helper-add ip filter sip-5060 sip udp % ./nft-ct-helper-get ip filter table filter name sip-5060 use 0 [ ct_helper name sip family 2 protocol 17 ] % ./nft-ct-helper-del ip filter sip-5060 % ./nft-ct-helper-get ip filter Signed-off-by: Yang Zheng Acked-by: Arturo Borrero Gonzalez Signed-off-by: Pablo Neira Ayuso --- examples/nft-ct-helper-get.c | 150 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 150 insertions(+) create mode 100644 examples/nft-ct-helper-get.c (limited to 'examples/nft-ct-helper-get.c') diff --git a/examples/nft-ct-helper-get.c b/examples/nft-ct-helper-get.c new file mode 100644 index 0000000..94bd0cd --- /dev/null +++ b/examples/nft-ct-helper-get.c @@ -0,0 +1,150 @@ +/* + * (C) 2012 by Pablo Neira Ayuso + * + * 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 + */ + + +#include +#include +#include +#include + +#include +#include + +#include +#include + +static int obj_cb(const struct nlmsghdr *nlh, void *data) +{ + struct nftnl_obj *t; + char buf[4096]; + uint32_t *type = data; + + t = nftnl_obj_alloc(); + if (t == NULL) { + perror("OOM"); + goto err; + } + + if (nftnl_obj_nlmsg_parse(nlh, t) < 0) { + perror("nftnl_obj_nlmsg_parse"); + goto err_free; + } + + nftnl_obj_snprintf(buf, sizeof(buf), t, *type, 0); + printf("%s\n", buf); + +err_free: + nftnl_obj_free(t); +err: + return MNL_CB_OK; +} + +int main(int argc, char *argv[]) +{ + struct mnl_socket *nl; + char buf[MNL_SOCKET_BUFFER_SIZE]; + struct nlmsghdr *nlh; + uint32_t portid, seq, family; + struct nftnl_obj *t = NULL; + int ret; + uint32_t type = NFTNL_OUTPUT_DEFAULT; + + if (argc < 3 || argc > 5) { + fprintf(stderr, "%s [] []\n", + argv[0]); + return 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], "unspec") == 0) + family = NFPROTO_UNSPEC; + else { + fprintf(stderr, "Unknown family: ip, ip6, inet, unspec"); + exit(EXIT_FAILURE); + } + + if (strcmp(argv[argc-1], "xml") == 0) { + type = NFTNL_OUTPUT_XML; + argv[argc-1] = NULL; + argc--; + }else if (strcmp(argv[argc-1], "json") == 0) { + type = NFTNL_OUTPUT_JSON; + argv[argc-1] = NULL; + argc--; + } else if (strcmp(argv[argc - 1], "default") == 0) { + argc--; + } + + if (argc == 3 || argc == 4) { + t = nftnl_obj_alloc(); + if (t == NULL) { + perror("OOM"); + exit(EXIT_FAILURE); + } + } + + seq = time(NULL); + nftnl_obj_set_u32(t, NFTNL_OBJ_TYPE, NFT_OBJECT_CT_HELPER); + if (argc < 4) { + nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_GETOBJ, family, + NLM_F_DUMP, seq); + if (argc == 3) { + nftnl_obj_set(t, NFTNL_OBJ_TABLE, argv[2]); + nftnl_obj_nlmsg_build_payload(nlh, t); + nftnl_obj_free(t); + } + } else { + nftnl_obj_set(t, NFTNL_OBJ_TABLE, argv[2]); + nftnl_obj_set(t, NFTNL_OBJ_NAME, argv[3]); + + nlh = nftnl_nlmsg_build_hdr(buf, NFT_MSG_GETOBJ, family, + NLM_F_ACK, seq); + nftnl_obj_nlmsg_build_payload(nlh, t); + nftnl_obj_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, obj_cb, &type); + 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; +} -- cgit v1.2.3