// SPDX-License-Identifier: GPL-2.0

/*

 * link_xfrm.c	Virtual XFRM Interface driver module

 *

 * Authors:	Matt Ellison <matt@arroyo.io>

 */

#include <string.h>

#include <linux/if_link.h>

#include "rt_names.h"

#include "utils.h"

#include "ip_common.h"

#include "tunnel.h"

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

			    FILE *f)

{

	fprintf(f,

		"Usage: ... %-4s dev [ PHYS_DEV ] [ if_id IF-ID ]\n"

		"\n"

		"Where: IF-ID := { 0x0..0xffffffff }\n",

		lu->id);

}

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

			  struct nlmsghdr *n)

{

	unsigned int link = 0;

	__u32 if_id = 0;

	while (argc > 0) {

		if (!matches(*argv, "dev")) {

			NEXT_ARG();

			link = ll_name_to_index(*argv);

			if (!link)

				exit(nodev(*argv));

		} else if (!matches(*argv, "if_id")) {

			NEXT_ARG();

			if (!get_u32(&if_id, *argv, 0))

				addattr32(n, 1024, IFLA_XFRM_IF_ID, if_id);

		} else {

			xfrm_print_help(lu, argc, argv, stderr);

			return -1;

		}

		argc--; argv++;

	}

	if (link)

		addattr32(n, 1024, IFLA_XFRM_LINK, link);

	return 0;

}

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

{

	if (!tb)

		return;

	if (tb[IFLA_XFRM_IF_ID]) {

		__u32 id = rta_getattr_u32(tb[IFLA_XFRM_IF_ID]);

		print_0xhex(PRINT_ANY, "if_id", "if_id %#llx ", id);

	}

}

struct link_util xfrm_link_util = {

	.id = "xfrm",

	.maxattr = IFLA_XFRM_MAX,

	.parse_opt = xfrm_parse_opt,

	.print_opt = xfrm_print_opt,

	.print_help = xfrm_print_help,

};