nl-addr-list.c

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2003-2009 Thomas Graf <tgraf@suug.ch>
 */
 
#include <netlink/cli/utils.h>
#include <netlink/cli/addr.h>
#include <netlink/cli/link.h>
 
#include <linux/netlink.h>
 
static void print_usage(void)
{
        printf(
"Usage: nl-addr-list [OPTION]... [ADDRESS]\n"
"\n"
"Options\n"
"     --details             Show details on multiple lines.\n"
"     --env                 Print address details in sh env variable syntax.\n"
"     --prefix=STRING       Prefix each printed line.\n"
" -h, --help                Show this help.\n"
" -v, --version             Show versioning information.\n"
"\n"
"Address Selection\n"
" -a, --local=ADDR          Local address.\n"
" -d, --dev=DEV             Associated network device.\n"
"     --family=FAMILY       Family of local address.\n"
"     --label=STRING        Address label (IPv4).\n"
"     --peer=ADDR           Peer address (IPv4).\n"
"     --scope=SCOPE         Address scope (IPv4).\n"
"     --broadcast=ADDR      Broadcast address of network (IPv4).\n"
"     --valid-lifetime=TS   Valid lifetime before route expires (IPv6).\n"
"     --preferred=TIME      Preferred lifetime (IPv6).\n"
"     --valid=TIME          Valid lifetime (IPv6).\n"
        );
        exit(0);
}
 
static char *prefix;
 
static void print_prefix(struct nl_dump_params *p, int line)
{
        if (prefix)
                nl_dump(p, "%s", prefix);
}
 
static void env_dump(struct nl_object *obj, void *arg)
{
        struct nl_dump_params *p = arg;
        struct rtnl_addr *addr = (struct rtnl_addr *) obj;
        struct nl_cache *link_cache;
        struct nl_addr *a;
        static int index = 0;
        char buf[128], pfx[32], *s;
 
        snprintf(pfx, sizeof(pfx), "ADDR%d", index++);
 
        nl_dump_line(p, "%s_FAMILY=%s\n", pfx,
                     nl_af2str(rtnl_addr_get_family(addr), buf, sizeof(buf)));
 
        nl_dump_line(p, "%s_LOCAL=%s\n", pfx,
                     nl_addr2str(rtnl_addr_get_local(addr), buf, sizeof(buf)));
 
        nl_dump_line(p, "%s_IFINDEX=%u\n", pfx, rtnl_addr_get_ifindex(addr));
        link_cache = nl_cache_mngt_require_safe("route/link");
        if (link_cache)
                nl_dump_line(p, "%s_IFNAME=%s\n", pfx,
                             rtnl_link_i2name(link_cache,
                                              rtnl_addr_get_ifindex(addr),
                                              buf, sizeof(buf)));
 
        if ((a = rtnl_addr_get_peer(addr)))
                nl_dump_line(p, "%s_PEER=%s\n", pfx,
                             nl_addr2str(a, buf, sizeof(buf)));
 
        if ((a = rtnl_addr_get_broadcast(addr)))
                nl_dump_line(p, "%s_BROADCAST=%s\n", pfx,
                             nl_addr2str(a, buf, sizeof(buf)));
 
        nl_dump_line(p, "%s_SCOPE=%s\n", pfx,
                     rtnl_scope2str(rtnl_addr_get_scope(addr),
                                    buf, sizeof(buf)));
 
        if ((s = rtnl_addr_get_label(addr)))
                nl_dump_line(p, "%s_LABEL=%s\n", pfx, s);
 
        rtnl_addr_flags2str(rtnl_addr_get_flags(addr), buf, sizeof(buf));
        if (buf[0])
                nl_dump_line(p, "%s_FLAGS=%s\n", pfx, buf);
 
        nl_dump_line(p, "%s_CACHEINFO_VALID=%u\n", pfx,
                     rtnl_addr_get_valid_lifetime(addr));
 
        if (link_cache)
                nl_cache_put(link_cache);
 
#if 0
        if (addr->ce_mask & ADDR_ATTR_CACHEINFO) {
                struct rtnl_addr_cacheinfo *ci = &addr->a_cacheinfo;
 
                nl_dump_line(p, "ADDR_CACHEINFO_PREFERRED=%u\n",
                             ci->aci_prefered);
 
                nl_dump_line(p, "ADDR_CACHEINFO_CREATED=%u\n", ci->aci_cstamp);
                nl_dump_line(p, "ADDR_CACHEINFO_LASTUPDATE=%u\n",
                             ci->aci_tstamp);
        }
#endif
}
 
int main(int argc, char *argv[])
{
        struct nl_sock *sock;
        struct rtnl_addr *addr;
        struct nl_cache *link_cache, *addr_cache;
        struct nl_dump_params params = {
                .dp_type = NL_DUMP_LINE,
                .dp_nl_cb = print_prefix,
                .dp_fd = stdout,
        };
        int dump_env = 0;
 
        sock = nl_cli_alloc_socket();
        nl_cli_connect(sock, NETLINK_ROUTE);
        link_cache = nl_cli_link_alloc_cache(sock);
        addr_cache = nl_cli_addr_alloc_cache(sock);
        addr = nl_cli_addr_alloc();
 
        for (;;) {
                int c, optidx = 0;
                enum {
                        ARG_FAMILY = 257,
                        ARG_LABEL = 258,
                        ARG_PEER,
                        ARG_SCOPE,
                        ARG_BROADCAST,
                        ARG_DETAILS,
                        ARG_ENV,
                        ARG_PREFIX,
                        ARG_PREFERRED,
                        ARG_VALID,
                };
                static struct option long_opts[] = {
                        { "details", 0, 0, ARG_DETAILS },
                        { "env", 0, 0, ARG_ENV },
                        { "prefix", 1, 0, ARG_PREFIX },
                        { "help", 0, 0, 'h' },
                        { "version", 0, 0, 'v' },
                        { "local", 1, 0, 'a' },
                        { "dev", 1, 0, 'd' },
                        { "family", 1, 0, ARG_FAMILY },
                        { "label", 1, 0, ARG_LABEL },
                        { "peer", 1, 0, ARG_PEER },
                        { "scope", 1, 0, ARG_SCOPE },
                        { "broadcast", 1, 0, ARG_BROADCAST },
                        { "preferred", 1, 0, ARG_PREFERRED },
                        { "valid", 1, 0, ARG_VALID },
                        { 0, 0, 0, 0 }
                };
 
                c = getopt_long(argc, argv, "46hva:d:", long_opts, &optidx);
                if (c == -1)
                        break;
 
                switch (c) {
                case '?': exit(NLE_INVAL);
                case '4': rtnl_addr_set_family(addr, AF_INET); break;
                case '6': rtnl_addr_set_family(addr, AF_INET6); break;
                case ARG_DETAILS: params.dp_type = NL_DUMP_DETAILS; break;
                case ARG_ENV: dump_env = 1; break;
                case ARG_PREFIX: prefix = strdup(optarg); break;
                case 'h': print_usage(); break;
                case 'v': nl_cli_print_version(); break;
                case 'a': nl_cli_addr_parse_local(addr, optarg); break;
                case 'd': nl_cli_addr_parse_dev(addr, link_cache, optarg); break;
                case ARG_FAMILY: nl_cli_addr_parse_family(addr, optarg); break;
                case ARG_LABEL: nl_cli_addr_parse_label(addr, optarg); break;
                case ARG_PEER: nl_cli_addr_parse_peer(addr, optarg); break;
                case ARG_SCOPE: nl_cli_addr_parse_scope(addr, optarg); break;
                case ARG_BROADCAST: nl_cli_addr_parse_broadcast(addr, optarg); break;
                case ARG_PREFERRED: nl_cli_addr_parse_preferred(addr, optarg); break;
                case ARG_VALID: nl_cli_addr_parse_valid(addr, optarg); break;
                }
        }
 
        if (dump_env)
                nl_cache_foreach_filter(addr_cache, OBJ_CAST(addr), env_dump,
                                        &params);
        else
                nl_cache_dump_filter(addr_cache, &params, OBJ_CAST(addr));
 
        return 0;
}