/* $Id$
 *
 * 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_route.c
 *
 *     Description:  functions to encode/decode/print the route header
 *
 *         Version:  1.0
 *         Created:  20/11/05 04:24:55 CET
 *        Revision:  none
 *        Compiler:  gcc
 *
 *          Author:  Elias Baixas (EB), elias@conillera.net
 *         Company:  VozTele.com
 *
 * =====================================================================================
 */

#define _GNU_SOURCE
#include <stdio.h>

#include "../../core/parser/parse_rr.h"
#include "../../core/parser/parse_uri.h"
#include "encode_route.h"
#include "encode_uri.h"
#include "encode_header.h"
#include "encode_parameters.h"
#include "xaddress.h"


#define HAS_NAME_F 0x01
#define HAS_Q_F 0x02
#define HAS_EXPIRES_F 0x04
#define HAS_RECEIVED_F 0x08
#define HAS_METHOD_F 0x10

/*
 * encodes a (maybe aggregated) route/record-route header.
 * encoding is:
 * 1: flags
 * 1: number of routes present
 * N: fore each route present, the length of the route
 * N*M: the route structures concatenated
 */
int encode_route_body(
		char *hdr, int hdrlen, rr_t *route_parsed, unsigned char *where)
{
	int i = 0, k, route_offset;
	unsigned char tmp[500];
	rr_t *myroute;

	for(route_offset = 0, i = 0, myroute = route_parsed; myroute;
			myroute = myroute->next, i++) {
		if((k = encode_route(hdr, hdrlen, myroute, &tmp[route_offset])) < 0) {
			LM_ERR("parsing route number %d\n", i);
			return -1;
		}
		where[2 + i] = (unsigned char)k;
		route_offset += k;
	}
	where[1] = (unsigned char)i;
	memcpy(&where[2 + i], tmp, route_offset);
	return 2 + i + route_offset;
}

/* Encoder for route/record-route units (may be inside an aggegated
 * Route/RRoute header, see [rfc3261, 7.3.1, page 30] ).
 * Returns the length of the encoded structure in bytes
 * FORMAT (byte meanings):
 * 1: flags
 * 	0x01 :	there is a Display Name
 * 1: length of the XURI-encoded uri in bytes.
 * [2]: optionally, 1 HDR-based ptr to the displayname + the length of the name
 * N: the XURI-encoded URI.
 * [N:] optionally, HDR-based pointers to the different header-parameters
 *
 */
int encode_route(char *hdrstart, int hdrlen, rr_t *body, unsigned char *where)
{
	int i = 2, j = 0; /* 1*flags + 1*URI_len*/
	unsigned char flags = 0;
	struct sip_uri puri;

	if(body->nameaddr.name.s && body->nameaddr.name.len) {
		flags |= HAS_NAME_F;
		where[i++] = (unsigned char)(body->nameaddr.name.s - hdrstart);
		where[i++] = (unsigned char)body->nameaddr.name.len;
	}

	if(parse_uri(body->nameaddr.uri.s, body->nameaddr.uri.len, &puri) < 0) {
		LM_ERR("Bad URI in address\n");
		return -1;
	} else {
		if((j = encode_uri2(
					hdrstart, hdrlen, body->nameaddr.uri, &puri, &where[i]))
				< 0) {
			LM_ERR("error codifying the URI\n");
			return -1;
		} else {
			i += j;
		}
	}
	where[0] = flags;
	where[1] = (unsigned char)j;
	i += encode_parameters(
			&where[i], (void *)body->params, hdrstart, body, 'n');
	return i;
}


int print_encoded_route_body(FILE *fd, char *hdr, int hdrlen,
		unsigned char *payload, int paylen, char *prefix)
{
	unsigned char numroutes;
	int i, offset;

	fprintf(fd, "%s", prefix);
	for(i = 0; i < paylen; i++)
		fprintf(fd, "%s%d%s", i == 0 ? "ENCODED CONTACT BODY:[" : ":",
				payload[i], i == paylen - 1 ? "]\n" : "");

	numroutes = payload[1];
	if(numroutes == 0) {
		LM_ERR("no routes present?\n");
		return -1;
	}
	for(i = 0, offset = 2 + numroutes; i < numroutes; i++) {
		print_encoded_route(fd, hdr, hdrlen, &payload[offset], payload[2 + i],
				strcat(prefix, "  "));
		offset += payload[2 + i];
		prefix[strlen(prefix) - 2] = 0;
	}
	return 1;
}

int print_encoded_route(FILE *fd, char *hdr, int hdrlen, unsigned char *payload,
		int paylen, char *prefix)
{
	int i = 2; /* flags + urilength */
	unsigned char flags = 0;

	flags = payload[0];
	fprintf(fd, "%s", prefix);
	for(i = 0; i < paylen; i++)
		fprintf(fd, "%s%d%s", i == 0 ? "ENCODED ROUTE=[" : ":", payload[i],
				i == paylen - 1 ? "]\n" : "");
	i = 2;
	if(flags & HAS_NAME_F) {
		fprintf(fd, "%sNAME=[%.*s]\n", prefix, payload[i + 1],
				&hdr[payload[i]]);
		i += 2;
	}
	if(print_encoded_uri(
			   fd, &payload[i], payload[1], hdr, hdrlen, strcat(prefix, "  "))
			< 0) {
		prefix[strlen(prefix) - 2] = 0;
		fprintf(fd, "Error parsing URI\n");
		return -1;
	}
	prefix[strlen(prefix) - 2] = 0;
	print_encoded_parameters(
			fd, &payload[i + payload[1]], hdr, paylen - i - payload[1], prefix);
	/* for(i+=payload[1];i<paylen-1;i+=2){
      fprintf(fd,"%s[PARAMETER[%.*s]",prefix,payload[i+1]-payload[i]-1,&hdr[payload[i]]);
      fprintf(fd,"VALUE[%.*s]]\n",(payload[i+2]-payload[i+1])==0?0:(payload[i+2]-payload[i+1]-1),&hdr[payload[i+1]]);
   }*/
	return 0;
}


int dump_route_body_test(char *hdr, int hdrlen, unsigned char *payload,
		int paylen, FILE *fd, char segregationLevel, char *prefix)
{
	unsigned char numroutes;
	int i, offset;

	if(!segregationLevel) {
		return dump_standard_hdr_test(
				hdr, hdrlen, (unsigned char *)payload, paylen, fd);
	}

	numroutes = payload[1];
	if(numroutes == 0) {
		LM_ERR("no routes present?\n");
		return -1;
	}
	if(segregationLevel & (JUNIT | SEGREGATE | ONLY_URIS)) {
		for(i = 0, offset = 2 + numroutes; i < numroutes; i++) {
			dump_route_test(hdr, hdrlen, &payload[offset], payload[2 + i], fd,
					segregationLevel, prefix);
			offset += payload[2 + i];
		}
	}
	return 1;
}

int dump_route_test(char *hdr, int hdrlen, unsigned char *payload, int paylen,
		FILE *fd, char segregationLevel, char *prefix)
{
	int i = 2; /* flags + urilength */
	unsigned char flags = 0;

	if(!(segregationLevel & (ONLY_URIS | JUNIT))) {
		return dump_standard_hdr_test(
				hdr, hdrlen, (unsigned char *)payload, paylen, fd);
	}
	flags = payload[0];
	i = 2;
	if(flags & HAS_NAME_F) {
		i += 2;
	}
	if((!(segregationLevel & JUNIT)) && (segregationLevel & ONLY_URIS)) {
		return dump_standard_hdr_test(
				hdr, hdrlen, (unsigned char *)(payload + i), payload[1], fd);
	}
	if((segregationLevel & JUNIT) && (segregationLevel & ONLY_URIS)) {
		return print_uri_junit_tests(
				hdr, hdrlen, &payload[i], payload[1], fd, 1, "");
	}
	if(segregationLevel & JUNIT) {
		i = 2;
		fprintf(fd, "%sgetAddress.getDisplayName=(S)", prefix);
		if(flags & HAS_NAME_F) {
			fprintf(fd, "%.*s\n", payload[i + 1], &hdr[payload[i]]);
			i += 2;
		} else
			fprintf(fd, "(null)\n");
		return print_uri_junit_tests(hdr, hdrlen, &payload[i], payload[1], fd,
				0, "getAddress.getURI.");
	}
	return 0;
}
