/*

 * iplink_ipoib.c	IPoIB 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:     Or Gerlitz <ogerlitz@mellanox.com>

 *		copied iflink_vlan.c authored by Patrick McHardy <kaber@trash.net>

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <linux/if_link.h>

#include "rt_names.h"

#include "utils.h"

#include "ip_common.h"

static void print_explain(FILE *f)

{

	fprintf(f,

		"Usage: ... ipoib [ pkey PKEY ]\n"

		"		 [ mode {datagram | connected} ]\n"

		"		 [ umcast {0|1} ]\n"

		"\n"

		"PKEY  := 0x8001-0xffff\n"

	);

}

static void explain(void)

{

	print_explain(stderr);

}

static int mode_arg(void)

{

	fprintf(stderr, "Error: argument of \"mode\" must be \"datagram\"or \"connected\"\n");

	return -1;

}

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

			  struct nlmsghdr *n)

{

	__u16 pkey, mode, umcast;

	while (argc > 0) {

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

			NEXT_ARG();

			if (get_u16(&pkey, *argv, 0))

				invarg("pkey is invalid", *argv);

			addattr_l(n, 1024, IFLA_IPOIB_PKEY, &pkey, 2);

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

			NEXT_ARG();

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

				mode = IPOIB_MODE_DATAGRAM;

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

				mode = IPOIB_MODE_CONNECTED;

			else

				return mode_arg();

			addattr_l(n, 1024, IFLA_IPOIB_MODE, &mode, 2);

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

			NEXT_ARG();

			if (get_u16(&umcast, *argv, 0))

				invarg("umcast is invalid", *argv);

			addattr_l(n, 1024, IFLA_IPOIB_UMCAST, &umcast, 2);

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

			explain();

			return -1;

		} else {

			fprintf(stderr, "ipoib: unknown option \"%s\"?\n", *argv);

			explain();

			return -1;

		}

		argc--, argv++;

	}

	return 0;

}

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

{

	__u16 mode;

	if (!tb)

		return;

	if (!tb[IFLA_IPOIB_PKEY] ||

	    RTA_PAYLOAD(tb[IFLA_IPOIB_PKEY]) < sizeof(__u16))

		return;

	__u16 pkey = rta_getattr_u16(tb[IFLA_IPOIB_PKEY]);

	if (is_json_context()) {

		SPRINT_BUF(b1);

		snprintf(b1, sizeof(b1), "%#.4x", pkey);

		print_string(PRINT_JSON, "key", NULL, b1);

	} else {

		fprintf(f, "pkey %#.4x ", pkey);

	}

	if (!tb[IFLA_IPOIB_MODE] ||

	    RTA_PAYLOAD(tb[IFLA_IPOIB_MODE]) < sizeof(__u16))

		return;

	mode = rta_getattr_u16(tb[IFLA_IPOIB_MODE]);

	const char *mode_str =

		mode == IPOIB_MODE_DATAGRAM ? "datagram" :

		mode == IPOIB_MODE_CONNECTED ? "connected" : "unknown";

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

	if (!tb[IFLA_IPOIB_UMCAST] ||

	    RTA_PAYLOAD(tb[IFLA_IPOIB_UMCAST]) < sizeof(__u16))

		return;

	__u16 umcast = rta_getattr_u16(tb[IFLA_IPOIB_UMCAST]);

	if (is_json_context()) {

		SPRINT_BUF(b1);

		snprintf(b1, sizeof(b1), "%.4x", umcast);

		print_string(PRINT_JSON, "umcast", NULL, b1);

	} else {

		fprintf(f, "umcast %.4x ", umcast);

	}

}

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

	FILE *f)

{

	print_explain(f);

}

struct link_util ipoib_link_util = {

	.id		= "ipoib",

	.maxattr	= IFLA_IPOIB_MAX,

	.parse_opt	= ipoib_parse_opt,

	.print_opt	= ipoib_print_opt,

	.print_help	= ipoib_print_help,

};