nf-ct-list.c

/* SPDX-License-Identifier: LGPL-2.1-only */
/*
 * Copyright (c) 2003-2009 Thomas Graf <tgraf@suug.ch>
 * Copyright (c) 2007 Philip Craig <philipc@snapgear.com>
 * Copyright (c) 2007 Secure Computing Corporation
 */
 
#include <netlink/cli/utils.h>
#include <netlink/cli/ct.h>
 
#include <linux/netlink.h>
 
static void print_usage(void)
{
        printf(
        "Usage: nf-ct-list [OPTION]... [CONNTRACK ENTRY]\n"
        "\n"
        "Options\n"
        " -f, --format=TYPE     Output format { brief | details | stats }\n"
        " -h, --help            Show this help\n"
        " -v, --version         Show versioning information\n"
        "\n"
        "Conntrack Selection\n"
        " -i, --id=NUM            Identifier\n"
        " -p, --proto=PROTOCOL    Protocol\n"
        "     --tcp-state=STATE   TCP connection state\n"
        "     --orig-src=ADDR     Original source address\n"
        "     --orig-sport=PORT   Original source port\n"
        "     --orig-dst=ADDR     Original destination address\n"
        "     --orig-dport=PORT   Original destination port\n"
        "     --reply-src=ADDR    Reply source address\n"
        "     --reply-sport=PORT  Reply source port\n"
        "     --reply-dst=ADDR    Reply destination address\n"
        "     --reply-dport=PORT  Reply destination port\n"
        " -F, --family=FAMILY     Address family\n"
        "     --mark=NUM          Mark value\n"
        "     --timeout=NUM       Timeout value\n"
        "     --refcnt=NUM        Use counter value\n"
        "     --flags             Flags\n"
        );
        exit(0);
}
 
int main(int argc, char *argv[])
{
        struct nl_sock *sock;
        struct nl_cache *ct_cache;
        struct nfnl_ct *ct;
        struct nl_dump_params params = {
                .dp_type = NL_DUMP_LINE,
                .dp_fd = stdout,
        };
 
        ct = nl_cli_ct_alloc();
 
        for (;;) {
                int c, optidx = 0;
                enum {
                        ARG_MARK = 257,
                        ARG_TCP_STATE = 258,
                        ARG_ORIG_SRC,
                        ARG_ORIG_SPORT,
                        ARG_ORIG_DST,
                        ARG_ORIG_DPORT,
                        ARG_REPLY_SRC,
                        ARG_REPLY_SPORT,
                        ARG_REPLY_DST,
                        ARG_REPLY_DPORT,
                        ARG_TIMEOUT,
                        ARG_REFCNT,
                        ARG_FLAGS,
                };
                static struct option long_opts[] = {
                        { "format", 1, 0, 'f' },
                        { "help", 0, 0, 'h' },
                        { "version", 0, 0, 'v' },
                        { "id", 1, 0, 'i' },
                        { "proto", 1, 0, 'p' },
                        { "tcp-state", 1, 0, ARG_TCP_STATE },
                        { "orig-src", 1, 0, ARG_ORIG_SRC },
                        { "orig-sport", 1, 0, ARG_ORIG_SPORT },
                        { "orig-dst", 1, 0, ARG_ORIG_DST },
                        { "orig-dport", 1, 0, ARG_ORIG_DPORT },
                        { "reply-src", 1, 0, ARG_REPLY_SRC },
                        { "reply-sport", 1, 0, ARG_REPLY_SPORT },
                        { "reply-dst", 1, 0, ARG_REPLY_DST },
                        { "reply-dport", 1, 0, ARG_REPLY_DPORT },
                        { "family", 1, 0, 'F' },
                        { "mark", 1, 0, ARG_MARK },
                        { "timeout", 1, 0, ARG_TIMEOUT },
                        { "refcnt", 1, 0, ARG_REFCNT },
                        { 0, 0, 0, 0 }
                };
 
                c = getopt_long(argc, argv, "46f:hvi:p:F:", long_opts, &optidx);
                if (c == -1)
                        break;
 
                switch (c) {
                case '?': exit(NLE_INVAL);
                case '4': nfnl_ct_set_family(ct, AF_INET); break;
                case '6': nfnl_ct_set_family(ct, AF_INET6); break;
                case 'f': params.dp_type = nl_cli_parse_dumptype(optarg); break;
                case 'h': print_usage(); break;
                case 'v': nl_cli_print_version(); break;
                case 'i': nl_cli_ct_parse_id(ct, optarg); break;
                case 'p': nl_cli_ct_parse_protocol(ct, optarg); break;
                case ARG_TCP_STATE: nl_cli_ct_parse_tcp_state(ct, optarg); break;
                case ARG_ORIG_SRC: nl_cli_ct_parse_src(ct, 0, optarg); break;
                case ARG_ORIG_SPORT: nl_cli_ct_parse_src_port(ct, 0, optarg); break;
                case ARG_ORIG_DST: nl_cli_ct_parse_dst(ct, 0, optarg); break;
                case ARG_ORIG_DPORT: nl_cli_ct_parse_dst_port(ct, 0, optarg); break;
                case ARG_REPLY_SRC: nl_cli_ct_parse_src(ct, 1, optarg); break;
                case ARG_REPLY_SPORT: nl_cli_ct_parse_src_port(ct, 1, optarg); break;
                case ARG_REPLY_DST: nl_cli_ct_parse_dst(ct, 1, optarg); break;
                case ARG_REPLY_DPORT: nl_cli_ct_parse_dst_port(ct, 1, optarg); break;
                case 'F': nl_cli_ct_parse_family(ct, optarg); break;
                case ARG_MARK: nl_cli_ct_parse_mark(ct, optarg); break;
                case ARG_TIMEOUT: nl_cli_ct_parse_timeout(ct, optarg); break;
                case ARG_REFCNT: nl_cli_ct_parse_use(ct, optarg); break;
                case ARG_FLAGS: nl_cli_ct_parse_status(ct, optarg); break;
                }
        }
 
        sock = nl_cli_alloc_socket();
        nl_cli_connect(sock, NETLINK_NETFILTER);
        ct_cache = nl_cli_ct_alloc_cache(sock);
 
        nl_cache_dump_filter(ct_cache, &params, OBJ_CAST(ct));
 
        return 0;
}