/* SPDX-License-Identifier: LGPL-2.1-only */

/*

 * src/nl-link-set.c     Set link attributes

 *

 *	This library is free software; you can redistribute it and/or

 *	modify it under the terms of the GNU Lesser General Public

 *	License as published by the Free Software Foundation version 2.1

 *	of the License.

 *

 * Copyright (c) 2003-2010 Thomas Graf <tgraf@suug.ch>

 */

#include <netlink/cli/utils.h>

#include <netlink/cli/link.h>

#include <linux/if.h>

#include <linux/netlink.h>

static struct nl_sock *sock;

static int quiet = 0;

#if 0

	"  changes := [link LINK]\n"

	"             [master MASTER] [qdisc QDISC] [addr ADDR] [broadcast BRD]\n"

	"             [{ up | down }] [{ arp | noarp }] [{ promisc | nopromisc }]\n"

	"             [{ dynamic | nodynamic }] [{ multicast | nomulticast }]\n"

	"             [{ trailers | notrailers }] [{ allmulticast | noallmulticast }]\n");

#endif

static void print_usage(void)

{

	printf(

	"Usage: nl-link-set [OPTION]... [LINK]\n"

	"\n"

	"Options\n"

	" -q, --quiet		Do not print informal notifications\n"

	" -h, --help            Show this help\n"

	" -v, --version         Show versioning information\n"

	"\n"

	"Selecting the Link\n"

	" -n, --name=NAME	link name\n"

	" -i, --index           interface index\n"

	"Change Options\n"

	"     --rename=NAME     rename interface\n"

	"     --mtu=NUM         MTU value\n"

	"     --txqlen=NUM      TX queue length\n"

	"     --weight=NUM      weight\n"

	"     --ifalias=NAME    alias name (SNMP IfAlias)\n"

	"     --state=up/down   set interface up/down\n"

	);

	exit(0);

}

static void set_cb(struct nl_object *obj, void *arg)

{

	struct rtnl_link *link = nl_object_priv(obj);

	struct rtnl_link *change = arg;

	struct nl_dump_params params = {

		.dp_type = NL_DUMP_LINE,

		.dp_fd = stdout,

	};

	int err;

	if ((err = rtnl_link_change(sock, link, change, 0)) < 0)

		nl_cli_fatal(err, "Unable to change link: %s",

			     nl_geterror(err));

	if (!quiet) {

		printf("Changed ");

		nl_object_dump(OBJ_CAST(link), &params);

	}

}

int main(int argc, char *argv[])

{

	struct nl_cache *link_cache;

	struct rtnl_link *link, *change;

	int ok = 0;

	sock = nl_cli_alloc_socket();

	nl_cli_connect(sock, NETLINK_ROUTE);

	link_cache = nl_cli_link_alloc_cache(sock);

	link = nl_cli_link_alloc();

	change = nl_cli_link_alloc();

	for (;;) {

		int c, optidx = 0;

		enum {

			ARG_RENAME = 257,

			ARG_MTU = 258,

			ARG_TXQLEN,

			ARG_WEIGHT,

			ARG_IFALIAS,

			ARG_STATE,

		};

		static struct option long_opts[] = {

			{ "quiet", 0, 0, 'q' },

			{ "help", 0, 0, 'h' },

			{ "version", 0, 0, 'v' },

			{ "name", 1, 0, 'n' },

			{ "index", 1, 0, 'i' },

			{ "rename", 1, 0, ARG_RENAME },

			{ "mtu", 1, 0, ARG_MTU },

			{ "txqlen", 1, 0, ARG_TXQLEN },

			{ "weight", 1, 0, ARG_WEIGHT },

			{ "ifalias", 1, 0, ARG_IFALIAS },

			{ "state", 1, 0, ARG_STATE },

			{ 0, 0, 0, 0 }

		};

		c = getopt_long(argc, argv, "qhvn:i:", long_opts, &optidx);

		if (c == -1)

			break;

		switch (c) {

		case 'q': quiet = 1; break;

		case 'h': print_usage(); break;

		case 'v': nl_cli_print_version(); break;

		case 'n': ok++; nl_cli_link_parse_name(link, optarg); break;

		case 'i': ok++; nl_cli_link_parse_ifindex(link, optarg); break;

		case ARG_RENAME: nl_cli_link_parse_name(change, optarg); break;

		case ARG_MTU: nl_cli_link_parse_mtu(change, optarg); break;

		case ARG_TXQLEN: nl_cli_link_parse_txqlen(change, optarg); break;

		case ARG_WEIGHT: nl_cli_link_parse_weight(change, optarg); break;

		case ARG_IFALIAS: nl_cli_link_parse_ifalias(change, optarg); break;

		case ARG_STATE:

			if(!strcmp(optarg, "up"))

				rtnl_link_set_flags(change, IFF_UP);

			else if(!strcmp(optarg, "down"))

				rtnl_link_unset_flags(change, IFF_UP);

			break;

		}

	}

	if (!ok)

		print_usage();

	nl_cache_foreach_filter(link_cache, OBJ_CAST(link), set_cb, change);

	return 0;

}