/*

 * q_qfq.c	QFQ.

 *

 *		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:	Stephen Hemminger <shemminger@vyatta.com>

 *		Fabio Checconi <fabio@gandalf.sssup.it>

 *

 */

#include <fcntl.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <string.h>

#include "utils.h"

#include "tc_util.h"

static void explain(void)

{

	fprintf(stderr, "Usage: ... qfq\n");

}

static void explain1(const char *arg)

{

	fprintf(stderr, "Illegal \"%s\"\n", arg);

}

static void explain_class(void)

{

	fprintf(stderr, "Usage: ... qfq weight NUMBER maxpkt BYTES\n");

}

static int qfq_parse_opt(struct qdisc_util *qu, int argc, char **argv,

			 struct nlmsghdr *n, const char *dev)

{

	if (argc > 0) {

		if (matches(*argv, "help") != 0)

			fprintf(stderr, "What is \"%s\"?\n", *argv);

		explain();

		return -1;

	}

	return 0;

}

static int qfq_parse_class_opt(struct qdisc_util *qu, int argc, char **argv,

			       struct nlmsghdr *n, const char *dev)

{

	struct rtattr *tail;

	__u32 tmp;

	tail = addattr_nest(n, 4096, TCA_OPTIONS);

	while (argc > 0) {

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

			NEXT_ARG();

			if (get_u32(&tmp, *argv, 10)) {

				explain1("weight"); return -1;

			}

			addattr32(n, 4096, TCA_QFQ_WEIGHT, tmp);

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

			NEXT_ARG();

			if (get_u32(&tmp, *argv, 10)) {

				explain1("maxpkt"); return -1;

			}

			addattr32(n, 4096, TCA_QFQ_LMAX, tmp);

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

			explain_class();

			return -1;

		} else {

			fprintf(stderr, "What is \"%s\"?\n", *argv);

			explain_class();

			return -1;

		}

		argc--; argv++;

	}

	addattr_nest_end(n, tail);

	return 0;

}

static int qfq_print_opt(struct qdisc_util *qu, FILE *f, struct rtattr *opt)

{

	struct rtattr *tb[TCA_QFQ_MAX + 1];

	if (opt == NULL)

		return 0;

	parse_rtattr_nested(tb, TCA_QFQ_MAX, opt);

	if (tb[TCA_QFQ_WEIGHT]) {

		fprintf(f, "weight %u ",

			rta_getattr_u32(tb[TCA_QFQ_WEIGHT]));

	}

	if (tb[TCA_QFQ_LMAX]) {

		fprintf(f, "maxpkt %u ",

			rta_getattr_u32(tb[TCA_QFQ_LMAX]));

	}

	return 0;

}

struct qdisc_util qfq_qdisc_util = {

	.id		= "qfq",

	.parse_qopt	= qfq_parse_opt,

	.print_qopt	= qfq_print_opt,

	.parse_copt	= qfq_parse_class_opt,

	.print_copt	= qfq_print_opt,

};