/* $Id$
 *
 * Copyright (C) 2006-2007 VozTelecom Sistemas S.L
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * Kamailio 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
 *
 * Kamailio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

/*
 * =====================================================================================
 *
 *        Filename:  encode_allow.c
 *
 *     Description:  [en|de]code allow header
 *
 *         Version:  1.0
 *         Created:  21/11/05 20:40:25 CET
 *        Revision:  none
 *        Compiler:  gcc
 *
 *          Author:  Elias Baixas (EB), elias@conillera.net
 *         Company:  VozTele.com
 *
 * =====================================================================================
 */

#define _GNU_SOURCE
#include <stdio.h>
#include <string.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "../../core/parser/parse_allow.h"
#include "../../core/parser/msg_parser.h"
#include "encode_allow.h"

char *mismetodos[] = {"UNDEF", "INVITE", "CANCEL", "ACK", "BYE", "INFO",
		"OPTIONS", "UPDATE", "REGISTER", "MESSAGE", "SUBSCRIBE", "NOTIFY",
		"PRACK", "REFER", "OTHER"};

/**
 * Encodes allow header.
 *
 * TODO: Does not support the UNDEFINED header type !!!
 */
int encode_allow(char *hdrstart, int hdrlen, unsigned int *bodi, char *where)
{
	unsigned int i;
	memcpy(&i, bodi, 4);
	i = htonl(i);
	memcpy(where, &i, 4);
	return 4;
}

int print_encoded_allow(FILE *fd, char *hdr, int hdrlen, unsigned char *payload,
		int paylen, char *prefix)
{
	unsigned int i, j = 0, body;

	memcpy(&body, payload, 4);
	body = ntohl(body);
	fprintf(fd, "%sMETHODS=", prefix);
	if(body == 0)
		fprintf(fd, "UNKNOWN");
	for(i = 0; i < 32; j = (0x01 << i), i++) {
		if(body & (j < 15))
			fprintf(fd, ",%s", mismetodos[i]);
	}
	fprintf(fd, "\n");
	return 1;
}
