/* iplink_ipvlan.c	IPVLAN/IPVTAP device support

 *

 *              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.

 *

 * Authors:     Mahesh Bandewar <maheshb@google.com>

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/socket.h>

#include <linux/if_link.h>

#include "rt_names.h"

#include "utils.h"

#include "ip_common.h"

static void print_explain(struct link_util *lu, FILE *f)

{

	fprintf(f,

		"Usage: ... %s [ mode MODE ] [ FLAGS ]\n"

		"\n"

		"MODE: l3 | l3s | l2\n"

		"FLAGS: bridge | private | vepa\n"

		"(first values are the defaults if nothing is specified).\n",

		lu->id);

}

static int ipvlan_parse_opt(struct link_util *lu, int argc, char **argv,

			    struct nlmsghdr *n)

{

	__u16 flags = 0;

	bool mflag_given = false;

	while (argc > 0) {

		if (matches(*argv, "mode") == 0) {

			__u16 mode = 0;

			NEXT_ARG();

			if (strcmp(*argv, "l2") == 0)

				mode = IPVLAN_MODE_L2;

			else if (strcmp(*argv, "l3") == 0)

				mode = IPVLAN_MODE_L3;

			else if (strcmp(*argv, "l3s") == 0)

				mode = IPVLAN_MODE_L3S;

			else {

				fprintf(stderr, "Error: argument of \"mode\" must be either \"l2\", \"l3\" or \"l3s\"\n");

				return -1;

			}

			addattr16(n, 1024, IFLA_IPVLAN_MODE, mode);

		} else if (matches(*argv, "private") == 0 && !mflag_given) {

			flags |= IPVLAN_F_PRIVATE;

			mflag_given = true;

		} else if (matches(*argv, "vepa") == 0 && !mflag_given) {

			flags |= IPVLAN_F_VEPA;

			mflag_given = true;

		} else if (matches(*argv, "bridge") == 0 && !mflag_given) {

			mflag_given = true;

		} else if (matches(*argv, "help") == 0) {

			print_explain(lu, stderr);

			return -1;

		} else {

			fprintf(stderr, "%s: unknown option \"%s\"?\n",

				lu->id, *argv);

			print_explain(lu, stderr);

			return -1;

		}

		argc--;

		argv++;

	}

	addattr16(n, 1024, IFLA_IPVLAN_FLAGS, flags);

	return 0;

}

static void ipvlan_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])

{

	if (!tb)

		return;

	if (tb[IFLA_IPVLAN_MODE]) {

		if (RTA_PAYLOAD(tb[IFLA_IPVLAN_MODE]) == sizeof(__u16)) {

			__u16 mode = rta_getattr_u16(tb[IFLA_IPVLAN_MODE]);

			const char *mode_str = mode == IPVLAN_MODE_L2 ? "l2" :

				mode == IPVLAN_MODE_L3 ? "l3" :

				mode == IPVLAN_MODE_L3S ? "l3s" : "unknown";

			print_string(PRINT_ANY, "mode", " mode %s ", mode_str);

		}

	}

	if (tb[IFLA_IPVLAN_FLAGS]) {

		if (RTA_PAYLOAD(tb[IFLA_IPVLAN_FLAGS]) == sizeof(__u16)) {

			__u16 flags = rta_getattr_u16(tb[IFLA_IPVLAN_FLAGS]);

			if (flags & IPVLAN_F_PRIVATE)

				print_bool(PRINT_ANY, "private", "private ",

					   true);

			else if (flags & IPVLAN_F_VEPA)

				print_bool(PRINT_ANY, "vepa", "vepa ",

					   true);

			else

				print_bool(PRINT_ANY, "bridge", "bridge ",

					   true);

		}

	}

}

static void ipvlan_print_help(struct link_util *lu, int argc, char **argv,

			      FILE *f)

{

	print_explain(lu, f);

}

struct link_util ipvlan_link_util = {

	.id		= "ipvlan",

	.maxattr	= IFLA_IPVLAN_MAX,

	.parse_opt	= ipvlan_parse_opt,

	.print_opt	= ipvlan_print_opt,

	.print_help	= ipvlan_print_help,

};

struct link_util ipvtap_link_util = {

	.id		= "ipvtap",

	.maxattr	= IFLA_IPVLAN_MAX,

	.parse_opt	= ipvlan_parse_opt,

	.print_opt	= ipvlan_print_opt,

	.print_help	= ipvlan_print_help,

};