/*******************************************************************************
 *
 * Copyright (c) 2000-2003 Intel Corporation 
 * All rights reserved. 
 * Copyright (c) 2012 France Telecom All rights reserved. 
 *
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met: 
 *
 * - Redistributions of source code must retain the above copyright notice, 
 * this list of conditions and the following disclaimer. 
 * - Redistributions in binary form must reproduce the above copyright notice, 
 * this list of conditions and the following disclaimer in the documentation 
 * and/or other materials provided with the distribution. 
 * - Neither name of Intel Corporation nor the names of its contributors 
 * may be used to endorse or promote products derived from this software 
 * without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 ******************************************************************************/

/*!
 * \file
 */

#include "config.h"

#if EXCLUDE_GENA == 0
#ifdef INCLUDE_DEVICE_APIS

#include "gena.h"
#include "httpparser.h"
#include "httpreadwrite.h"
#include "parsetools.h"
#include "ssdplib.h"
#include "statcodes.h"
#include "sysdep.h"
#include "unixutil.h"
#include "upnpapi.h"
#include "uuid.h"

#ifdef WIN32
	#define snprintf _snprintf
#endif

/*!
 * \brief Unregisters a device.
 *
 * \return UPNP_E_SUCCESS on success, GENA_E_BAD_HANDLE on failure.
 */
int genaUnregisterDevice(
	/*! [in] Device handle. */
	UpnpDevice_Handle device_handle)
{
	int ret = 0;
	struct Handle_Info *handle_info;

	HandleLock();
	if (GetHandleInfo(device_handle, &handle_info) != HND_DEVICE) {
		UpnpPrintf(UPNP_CRITICAL, GENA, __FILE__, __LINE__,
			"genaUnregisterDevice: BAD Handle: %d\n",
			device_handle);
		ret = GENA_E_BAD_HANDLE;
	} else {
		freeServiceTable(&handle_info->ServiceTable);
		ret = UPNP_E_SUCCESS;
	}
	HandleUnlock();

	return ret;
}

/*!
 * \brief Generates XML property set for notifications.
 *
 * \return UPNP_E_SUCCESS if successful else returns GENA_E_BAD_HANDLE.
 *
 * \note The XML_VERSION comment is NOT sent due to interoperability issues
 * 	with other UPnP vendors.
 */
static int GeneratePropertySet(
	/*! [in] Array of variable names (go in the event notify). */
	char **names,
	/*! [in] Array of variable values (go in the event notify). */
	char **values,
	/*! [in] number of variables. */
	int count,
	/*! [out] PropertySet node in the string format. */
	DOMString *out)
{
	char *buffer;
	int counter = 0;
	size_t size = 0;

	/*size += strlen(XML_VERSION);*/
	size += strlen(XML_PROPERTYSET_HEADER);
	size += strlen("</e:propertyset>\n\n");
	for (counter = 0; counter < count; counter++) {
		size += strlen( "<e:property>\n</e:property>\n" );
		size += 2 * strlen(names[counter]) +
			strlen(values[counter]) +
			strlen("<></>\n");
	}

	buffer = (char *)malloc(size + 1);
	if (buffer == NULL)
		return UPNP_E_OUTOF_MEMORY;
	memset(buffer, 0, size + 1);
	/*
	strcpy(buffer,XML_VERSION);
	strcat(buffer, XML_PROPERTYSET_HEADER);
	*/
	strcpy(buffer, XML_PROPERTYSET_HEADER);
	for (counter = 0; counter < count; counter++) {
		strcat(buffer, "<e:property>\n");
		sprintf(&buffer[strlen(buffer)],
			"<%s>%s</%s>\n</e:property>\n",
			names[counter],
			values[counter],
			names[counter]);
	}
	strcat(buffer, "</e:propertyset>\n\n");
	*out = ixmlCloneDOMString(buffer);
	free(buffer);

	return XML_SUCCESS;
}

/*!
 * \brief Frees memory used in notify_threads if the reference count is 0,
 * otherwise decrements the refrence count.
 */
static void free_notify_struct(
	/*! [in] Notify structure. */
	notify_thread_struct *input)
{
	(*input->reference_count)--;
	if (*input->reference_count == 0) {
		free(input->headers);
		ixmlFreeDOMString(input->propertySet);
		free(input->servId);
		free(input->UDN);
		free(input->reference_count);
	}
	free(input);
}

/*!
 * \brief Sends the notify message and returns a reply.
 *
 * \return on success returns UPNP_E_SUCCESS, otherwise returns a UPNP error.
 *
 * \note called by genaNotify
 */
static UPNP_INLINE int notify_send_and_recv(
	/*! [in] subscription callback URL (URL of the control point). */
	uri_type *destination_url,
	/*! [in] Common HTTP headers. */
	membuffer *mid_msg,
	/*! [in] The evented XML. */
	char *propertySet,
	/*! [out] The response from the control point. */
	http_parser_t *response)
{
	uri_type url;
	SOCKET conn_fd;
	membuffer start_msg;
	int ret_code;
	int err_code;
	int timeout;
	SOCKINFO info;
	const char *CRLF = "\r\n";

	/* connect */
	UpnpPrintf(UPNP_ALL, GENA, __FILE__, __LINE__,
		"gena notify to: %.*s\n",
		(int)destination_url->hostport.text.size,
		destination_url->hostport.text.buff);

	conn_fd = http_Connect(destination_url, &url);
	if (conn_fd < 0)
		/* return UPNP error */
		return UPNP_E_SOCKET_CONNECT;
	ret_code = sock_init(&info, conn_fd);
	if (ret_code) {
		sock_destroy(&info, SD_BOTH);
		return ret_code;
	}
	/* make start line and HOST header */
	membuffer_init(&start_msg);
	if (http_MakeMessage(
			&start_msg, 1, 1,
			"q" "s",
			HTTPMETHOD_NOTIFY, &url,
			mid_msg->buf) != 0) {
		membuffer_destroy(&start_msg);
		sock_destroy(&info, SD_BOTH);
		return UPNP_E_OUTOF_MEMORY;
	}
	timeout = GENA_NOTIFICATION_SENDING_TIMEOUT;
	/* send msg (note: end of notification will contain "\r\n" twice) */
	ret_code = http_SendMessage(&info, &timeout,
		"bbb",
		start_msg.buf, start_msg.length,
		propertySet, strlen(propertySet),
		CRLF, strlen(CRLF));
	if (ret_code) {
		membuffer_destroy(&start_msg);
		sock_destroy(&info, SD_BOTH);
		return ret_code;
	}
	timeout = GENA_NOTIFICATION_ANSWERING_TIMEOUT;
	ret_code = http_RecvMessage(&info, response,
		HTTPMETHOD_NOTIFY, &timeout, &err_code);
	if (ret_code) {
		membuffer_destroy(&start_msg);
		sock_destroy(&info, SD_BOTH);
		httpmsg_destroy(&response->msg);
		return ret_code;
	}
	/* should shutdown completely when closing socket */
	sock_destroy(&info, SD_BOTH);
	membuffer_destroy(&start_msg);

	return UPNP_E_SUCCESS;
}

/*!
 * \brief Function to Notify a particular subscription of a particular event.
 *
 * In general the service should NOT be blocked around this call (this may
 * cause deadlock with a client).
 *
 * NOTIFY http request is sent and the reply is processed.
 *
 * \return GENA_SUCCESS if the event was delivered, otherwise returns the
 * 	appropriate error code.
 */
static int genaNotify(
	/*! [in] Null terminated, includes all headers (including \\r\\n) except SID and SEQ. */
	char *headers,
	/*! [in] The evented XML. */
	char *propertySet,
	/*! [in] subscription to be Notified, assumes this is valid for life of function. */
	subscription *sub)
{
	size_t i;
	membuffer mid_msg;
	uri_type *url;
	http_parser_t response;
	int return_code = -1;

	membuffer_init(&mid_msg);
	if (http_MakeMessage(&mid_msg, 1, 1,
			     "s" "ssc" "sdcc",
			     headers,
			     "SID: ", sub->sid,
			     "SEQ: ", sub->ToSendEventKey) != 0) {
		membuffer_destroy(&mid_msg);
		return UPNP_E_OUTOF_MEMORY;
	}
	/* send a notify to each url until one goes thru */
	for (i = 0; i < sub->DeliveryURLs.size; i++) {
		url = &sub->DeliveryURLs.parsedURLs[i];
		return_code = notify_send_and_recv(
			url, &mid_msg, propertySet, &response);
		if (return_code == UPNP_E_SUCCESS)
			break;
	}
	membuffer_destroy(&mid_msg);
	if (return_code == UPNP_E_SUCCESS) {
		if (response.msg.status_code == HTTP_OK)
			return_code = GENA_SUCCESS;
		else {
			if (response.msg.status_code == HTTP_PRECONDITION_FAILED)
				/*Invalid SID gets removed */
				return_code = GENA_E_NOTIFY_UNACCEPTED_REMOVE_SUB;
			else
				return_code = GENA_E_NOTIFY_UNACCEPTED;
		}
		httpmsg_destroy(&response.msg);
	}

	return return_code;
}


/*!
 * \brief Thread job to Notify a control point.
 *
 * It validates the subscription and copies the subscription. Also make sure
 * that events are sent in order.
 *
 * \note calls the genaNotify to do the actual work.
 */
static void genaNotifyThread(
	/*! [in] notify thread structure containing all the headers and property set info. */
	void *input)
{
	subscription *sub;
	service_info *service;
	subscription sub_copy;
	notify_thread_struct *in = (notify_thread_struct *) input;
	int return_code;
	struct Handle_Info *handle_info;
	ThreadPoolJob job;

	memset(&job, 0, sizeof(job));

	/* This should be a HandleLock and not a HandleReadLock otherwise if there
	 * is a lot of notifications, then multiple threads will acquire a read
	 * lock and the thread which sends the notification will be blocked forever
	 * on the HandleLock at the end of this function. */
	/*HandleReadLock(); */
	HandleLock();
	/* validate context */

	if (GetHandleInfo(in->device_handle, &handle_info) != HND_DEVICE) {
		free_notify_struct(in);
		HandleUnlock();
		return;
	}

	if (!(service = FindServiceId(&handle_info->ServiceTable, in->servId, in->UDN)) ||
	    !service->active ||
	    !(sub = GetSubscriptionSID(in->sid, service)) ||
	    copy_subscription(sub, &sub_copy) != HTTP_SUCCESS) {
		free_notify_struct(in);
		HandleUnlock();
		return;
	}
#ifdef UPNP_ENABLE_NOTIFICATION_REORDERING
	/*If the event is out of order push it back to the job queue */
	if (in->eventKey != sub->ToSendEventKey) {
		TPJobInit(&job, (start_routine) genaNotifyThread, input);
		TPJobSetFreeFunction(&job, (free_function) free_notify_struct);
		TPJobSetPriority(&job, MED_PRIORITY);
		/* Sleep a little before creating another thread otherwise if there is
		 * a lot of notifications to send, the device will take 100% of the CPU
		 * to create threads and push them back to the job queue. */
		imillisleep(1);
		ThreadPoolAdd(&gSendThreadPool, &job, NULL);
		freeSubscription(&sub_copy);
		HandleUnlock();
		return;
	}
#endif

	HandleUnlock();

	/* send the notify */
	return_code = genaNotify(in->headers, in->propertySet, &sub_copy);
	freeSubscription(&sub_copy);
	HandleLock();
	if (GetHandleInfo(in->device_handle, &handle_info) != HND_DEVICE) {
		free_notify_struct(in);
		HandleUnlock();
		return;
	}
	/* validate context */
	if (!(service = FindServiceId(&handle_info->ServiceTable, in->servId, in->UDN)) ||
	    !service->active ||
	    !(sub = GetSubscriptionSID(in->sid, service))) {
		free_notify_struct(in);
		HandleUnlock();
		return;
	}
	sub->ToSendEventKey++;
	if (sub->ToSendEventKey < 0)
		/* wrap to 1 for overflow */
		sub->ToSendEventKey = 1;
	if (return_code == GENA_E_NOTIFY_UNACCEPTED_REMOVE_SUB)
		RemoveSubscriptionSID(in->sid, service);
	free_notify_struct(in);

	HandleUnlock();
}


/*!
 * \brief Allocates the GENA header.
 *
 * \note The header must be destroyed after with a call to free(), otherwise
 * there will be a memory leak.
 *
 * \return The constructed header.
 */
static char *AllocGenaHeaders(
	/*! [in] The property set string. */
	const DOMString propertySet)
{
	static const char *HEADER_LINE_1 =
		"CONTENT-TYPE: text/xml; charset=\"utf-8\"\r\n";
	static const char *HEADER_LINE_2A =
		"CONTENT-LENGTH: ";
	static const char *HEADER_LINE_2B =
		"\r\n";
	static const char *HEADER_LINE_3 =
		"NT: upnp:event\r\n";
	static const char *HEADER_LINE_4 =
		"NTS: upnp:propchange\r\n";
	char *headers = NULL;
	size_t headers_size = 0;
	int line = 0;
	int rc = 0;

	headers_size =
		strlen(HEADER_LINE_1 ) +
		strlen(HEADER_LINE_2A) + MAX_CONTENT_LENGTH +
		strlen(HEADER_LINE_2B) +
		strlen(HEADER_LINE_3 ) +
		strlen(HEADER_LINE_4 ) + 1;
	headers = (char *)malloc(headers_size);
	if (headers == NULL) {
		line = __LINE__;
		goto ExitFunction;
	}
	rc = snprintf(headers, headers_size, "%s%s%"PRIzu"%s%s%s",
		HEADER_LINE_1,
		HEADER_LINE_2A,
		strlen(propertySet) + 2,
		HEADER_LINE_2B,
		HEADER_LINE_3,
		HEADER_LINE_4);

ExitFunction:
	if (headers == NULL || rc < 0 || (unsigned int) rc >= headers_size) {
		UpnpPrintf(UPNP_ALL, GENA, __FILE__, line,
			"AllocGenaHeaders(): Error UPNP_E_OUTOF_MEMORY\n");
	}
	return headers;
}


int genaInitNotify(
	UpnpDevice_Handle device_handle,
	char *UDN,
	char *servId,
	char **VarNames,
	char **VarValues,
	int var_count,
	const Upnp_SID sid)
{
	int ret = GENA_SUCCESS;
	int line = 0;

	int *reference_count = NULL;
	char *UDN_copy = NULL;
	char *servId_copy = NULL;
	DOMString propertySet = NULL;
	char *headers = NULL;
	notify_thread_struct *thread_struct = NULL;

	subscription *sub = NULL;
	service_info *service = NULL;
	struct Handle_Info *handle_info;
	ThreadPoolJob job;

	memset(&job, 0, sizeof(job));

	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"GENA BEGIN INITIAL NOTIFY");

	reference_count = (int *)malloc(sizeof (int));
	if (reference_count == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}
	*reference_count = 0;
	
	UDN_copy = strdup(UDN);
	if (UDN_copy == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	servId_copy = strdup(servId);
	if (servId_copy == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	HandleLock();

	if (GetHandleInfo(device_handle, &handle_info) != HND_DEVICE) {
		line = __LINE__;
		ret = GENA_E_BAD_HANDLE;
		goto ExitFunction;
	}

	service = FindServiceId(&handle_info->ServiceTable, servId, UDN);
	if (service == NULL) {
		line = __LINE__;
		ret = GENA_E_BAD_SERVICE;
		goto ExitFunction;
	}
	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"FOUND SERVICE IN INIT NOTFY: UDN %s, ServID: %s",
		UDN, servId);

	sub = GetSubscriptionSID(sid, service);
	if (sub == NULL || sub->active) {
		line = __LINE__;
		ret = GENA_E_BAD_SID;
		goto ExitFunction;
	}
	UpnpPrintf( UPNP_INFO, GENA, __FILE__, __LINE__,
		"FOUND SUBSCRIPTION IN INIT NOTIFY: SID %s", sid);
	sub->active = 1;

	if (var_count <= 0) {
		line = __LINE__;
		ret = GENA_SUCCESS;
		goto ExitFunction;
	}

	ret = GeneratePropertySet(VarNames, VarValues, var_count, &propertySet);
	if (ret != XML_SUCCESS) {
		line = __LINE__;
		goto ExitFunction;
	}
	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"GENERATED PROPERTY SET IN INIT NOTIFY: %s",
		propertySet);

	headers = AllocGenaHeaders(propertySet);
	if (headers == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	/* schedule thread for initial notification */

	thread_struct = (notify_thread_struct *)malloc(sizeof (notify_thread_struct));
	if (thread_struct == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
	} else {
		*reference_count = 1;
		thread_struct->servId = servId_copy;
		thread_struct->UDN = UDN_copy;
		thread_struct->headers = headers;
		thread_struct->propertySet = propertySet;
		memset(thread_struct->sid, 0, sizeof(thread_struct->sid));
		strncpy(thread_struct->sid, sid,
			sizeof(thread_struct->sid) - 1);
		thread_struct->eventKey = sub->eventKey++;
		thread_struct->reference_count = reference_count;
		thread_struct->device_handle = device_handle;

		TPJobInit(&job, (start_routine)genaNotifyThread, thread_struct);
		TPJobSetFreeFunction(&job, (free_routine)free_notify_struct);
		TPJobSetPriority(&job, MED_PRIORITY);

		ret = ThreadPoolAdd(&gSendThreadPool, &job, NULL);
		if (ret != 0) {
			if (ret == EOUTOFMEM) {
				line = __LINE__;
				ret = UPNP_E_OUTOF_MEMORY;
			}
		} else {
			line = __LINE__;
			ret = GENA_SUCCESS;
		}
	}

ExitFunction:
	if (ret != GENA_SUCCESS || var_count <= 0) {
		free(thread_struct);
		free(headers);
		ixmlFreeDOMString(propertySet);
		free(servId_copy);
		free(UDN_copy);
		free(reference_count);
	}

	HandleUnlock();

	UpnpPrintf(UPNP_INFO, GENA, __FILE__, line,
		"GENA END INITIAL NOTIFY, ret = %d",
		ret);

	return ret;
}


int genaInitNotifyExt(
	UpnpDevice_Handle device_handle,
	char *UDN,
	char *servId,
	IXML_Document *PropSet,
	const Upnp_SID sid)
{
	int ret = GENA_SUCCESS;
	int line = 0;

	int *reference_count = NULL;
	char *UDN_copy = NULL;
	char *servId_copy = NULL;
	DOMString propertySet = NULL;
	char *headers = NULL;
	notify_thread_struct *thread_struct = NULL;

	subscription *sub = NULL;
	service_info *service = NULL;
	struct Handle_Info *handle_info;
	ThreadPoolJob job;

	memset(&job, 0, sizeof(job));

	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"GENA BEGIN INITIAL NOTIFY EXT");
	
	reference_count = (int *)malloc(sizeof (int));
	if (reference_count == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}
	*reference_count = 0;
	
	UDN_copy = strdup(UDN);
	if (UDN_copy == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	servId_copy = strdup(servId);
	if( servId_copy == NULL ) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	HandleLock();

	if (GetHandleInfo(device_handle, &handle_info) != HND_DEVICE) {
		line = __LINE__;
		ret = GENA_E_BAD_HANDLE;
		goto ExitFunction;
	}

	service = FindServiceId(&handle_info->ServiceTable, servId, UDN);
	if (service == NULL) {
		line = __LINE__;
		ret = GENA_E_BAD_SERVICE;
		goto ExitFunction;
	}
	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"FOUND SERVICE IN INIT NOTFY EXT: UDN %s, ServID: %s",
		UDN, servId);

	sub = GetSubscriptionSID(sid, service);
	if (sub == NULL || sub->active) {
		line = __LINE__;
		ret = GENA_E_BAD_SID;
		goto ExitFunction;
	}
	UpnpPrintf( UPNP_INFO, GENA, __FILE__, __LINE__,
		"FOUND SUBSCRIPTION IN INIT NOTIFY EXT: SID %s", sid);
	sub->active = 1;

	if (PropSet == 0) {
		line = __LINE__;
		ret = GENA_SUCCESS;
		goto ExitFunction;
	}

	propertySet = ixmlPrintNode((IXML_Node *)PropSet);
	if (propertySet == NULL) {
		line = __LINE__;
		ret = UPNP_E_INVALID_PARAM;
		goto ExitFunction;
	}
	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"GENERATED PROPERTY SET IN INIT EXT NOTIFY: %s",
		propertySet);

	headers = AllocGenaHeaders(propertySet);
	if (headers == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	/* schedule thread for initial notification */

	thread_struct = (notify_thread_struct *)malloc(sizeof (notify_thread_struct));
	if (thread_struct == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
	} else {
		*reference_count = 1;
		thread_struct->servId = servId_copy;
		thread_struct->UDN = UDN_copy;
		thread_struct->headers = headers;
		thread_struct->propertySet = propertySet;
		memset(thread_struct->sid, 0, sizeof(thread_struct->sid));
		strncpy(thread_struct->sid, sid,
			sizeof(thread_struct->sid) - 1);
		thread_struct->eventKey = sub->eventKey++;
		thread_struct->reference_count = reference_count;
		thread_struct->device_handle = device_handle;

		TPJobInit(&job, (start_routine)genaNotifyThread, thread_struct);
		TPJobSetFreeFunction(&job, (free_routine)free_notify_struct);
		TPJobSetPriority(&job, MED_PRIORITY);

		ret = ThreadPoolAdd(&gSendThreadPool, &job, NULL);
		if (ret != 0) {
			if (ret == EOUTOFMEM) {
				line = __LINE__;
				ret = UPNP_E_OUTOF_MEMORY;
			}
		} else {
			line = __LINE__;
			ret = GENA_SUCCESS;
		}
	}

ExitFunction:
	if (ret != GENA_SUCCESS || PropSet == 0) {
		free(thread_struct);
		free(headers);
		ixmlFreeDOMString(propertySet);
		free(servId_copy);
		free(UDN_copy);
		free(reference_count);
	}

	HandleUnlock();

	UpnpPrintf(UPNP_INFO, GENA, __FILE__, line,
		"GENA END INITIAL NOTIFY EXT, ret = %d",
		ret);

	return ret;
}


int genaNotifyAllExt(
	UpnpDevice_Handle device_handle,
	char *UDN,
	char *servId,
	IXML_Document *PropSet)
{
	int ret = GENA_SUCCESS;
	int line = 0;

	int *reference_count = NULL;
	char *UDN_copy = NULL;
	char *servId_copy = NULL;
	DOMString propertySet = NULL;
	char *headers = NULL;
	notify_thread_struct *thread_struct = NULL;

	subscription *finger = NULL;
	service_info *service = NULL;
	struct Handle_Info *handle_info;
	ThreadPoolJob job;

	memset(&job, 0, sizeof(job));

	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"GENA BEGIN NOTIFY ALL EXT");

	reference_count = (int *)malloc(sizeof (int));
	if (reference_count == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}
	*reference_count = 0;
	
	UDN_copy = strdup(UDN);
	if (UDN_copy == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	servId_copy = strdup(servId);
	if( servId_copy == NULL ) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	propertySet = ixmlPrintNode((IXML_Node *)PropSet);
	if (propertySet == NULL) {
		line = __LINE__;
		ret = UPNP_E_INVALID_PARAM;
		goto ExitFunction;
	}
	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"GENERATED PROPERTY SET IN EXT NOTIFY: %s",
		propertySet);

	headers = AllocGenaHeaders(propertySet);
	if (headers == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	HandleLock();

	if (GetHandleInfo(device_handle, &handle_info) != HND_DEVICE) {
		line = __LINE__;
		ret = GENA_E_BAD_HANDLE;
	} else {
		service = FindServiceId(&handle_info->ServiceTable, servId, UDN);
		if (service != NULL) {
			finger = GetFirstSubscription(service);
			while (finger) {
				thread_struct = (notify_thread_struct *)malloc(sizeof (notify_thread_struct));
				if (thread_struct == NULL) {
					line = __LINE__;
					ret = UPNP_E_OUTOF_MEMORY;
					break;
				}

				(*reference_count)++;
				thread_struct->reference_count = reference_count;
				thread_struct->UDN = UDN_copy;
				thread_struct->servId = servId_copy;
				thread_struct->headers = headers;
				thread_struct->propertySet = propertySet;
				memset(thread_struct->sid, 0,
					sizeof(thread_struct->sid));
				strncpy(thread_struct->sid, finger->sid,
					sizeof(thread_struct->sid) - 1);
				thread_struct->eventKey = finger->eventKey++;
				thread_struct->device_handle = device_handle;
				/* if overflow, wrap to 1 */
				if (finger->eventKey < 0) {
					finger->eventKey = 1;
				}

				TPJobInit(&job, (start_routine)genaNotifyThread, thread_struct);
				TPJobSetFreeFunction(&job, (free_routine)free_notify_struct);
				TPJobSetPriority(&job, MED_PRIORITY);
				ret = ThreadPoolAdd(&gSendThreadPool, &job, NULL);
				if (ret != 0) {
					line = __LINE__;
					if (ret == EOUTOFMEM) {
						line = __LINE__;
						ret = UPNP_E_OUTOF_MEMORY;
					}
					break;
				}

				finger = GetNextSubscription(service, finger);
			}
		} else {
			line = __LINE__;
			ret = GENA_E_BAD_SERVICE;
		}
	}

ExitFunction:
	if (ret != GENA_SUCCESS || *reference_count == 0) {
		free(headers);
		ixmlFreeDOMString(propertySet);
		free(servId_copy);
		free(UDN_copy);
		free(reference_count);
	}

	HandleUnlock();

	UpnpPrintf(UPNP_INFO, GENA, __FILE__, line,
		"GENA END NOTIFY ALL EXT, ret = %d",
		ret);

	return ret;
}


int genaNotifyAll(
	UpnpDevice_Handle device_handle,
	char *UDN,
	char *servId,
	char **VarNames,
	char **VarValues,
	int var_count)
{
	int ret = GENA_SUCCESS;
	int line = 0;

	int *reference_count = NULL;
	char *UDN_copy = NULL;
	char *servId_copy = NULL;
	DOMString propertySet = NULL;
	char *headers = NULL;
	notify_thread_struct *thread_struct = NULL;

	subscription *finger = NULL;
	service_info *service = NULL;
	struct Handle_Info *handle_info;
	ThreadPoolJob job;

	memset(&job, 0, sizeof(job));

	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"GENA BEGIN NOTIFY ALL");

	reference_count = (int *)malloc(sizeof (int));
	if (reference_count == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}
	*reference_count = 0;
	
	UDN_copy = strdup(UDN);
	if (UDN_copy == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	servId_copy = strdup(servId);
	if( servId_copy == NULL ) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	ret = GeneratePropertySet(VarNames, VarValues, var_count, &propertySet);
	if (ret != XML_SUCCESS) {
		line = __LINE__;
		goto ExitFunction;
	}
	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"GENERATED PROPERTY SET IN EXT NOTIFY: %s",
		propertySet);

	headers = AllocGenaHeaders(propertySet);
	if (headers == NULL) {
		line = __LINE__;
		ret = UPNP_E_OUTOF_MEMORY;
		goto ExitFunction;
	}

	HandleLock();

	if (GetHandleInfo(device_handle, &handle_info) != HND_DEVICE) {
		line = __LINE__;
		ret = GENA_E_BAD_HANDLE;
	} else {
		service = FindServiceId(&handle_info->ServiceTable, servId, UDN);
		if (service != NULL) {
			finger = GetFirstSubscription(service);
			while (finger) {
				thread_struct = (notify_thread_struct *)malloc(sizeof (notify_thread_struct));
				if (thread_struct == NULL) {
					line = __LINE__;
					ret = UPNP_E_OUTOF_MEMORY;
					break;
				}

				(*reference_count)++;
				thread_struct->reference_count = reference_count;
				thread_struct->UDN = UDN_copy;
				thread_struct->servId = servId_copy;
				thread_struct->headers = headers;
				thread_struct->propertySet = propertySet;
				memset(thread_struct->sid, 0,
					sizeof(thread_struct->sid));
				strncpy(thread_struct->sid, finger->sid,
					sizeof(thread_struct->sid) - 1);
				thread_struct->eventKey = finger->eventKey++;
				thread_struct->device_handle = device_handle;
				/* if overflow, wrap to 1 */
				if (finger->eventKey < 0) {
					finger->eventKey = 1;
				}


				TPJobInit(&job, (start_routine)genaNotifyThread, thread_struct);
				TPJobSetFreeFunction(&job, (free_routine)free_notify_struct);
				TPJobSetPriority(&job, MED_PRIORITY);
				ret = ThreadPoolAdd(&gSendThreadPool, &job, NULL);
				if (ret != 0) {
					line = __LINE__;
					if (ret == EOUTOFMEM) {
						line = __LINE__;
						ret = UPNP_E_OUTOF_MEMORY;
					}
					break;
				}

				finger = GetNextSubscription(service, finger);
			}
		} else {
			line = __LINE__;
			ret = GENA_E_BAD_SERVICE;
		}
	}

ExitFunction:
	if (ret != GENA_SUCCESS || *reference_count == 0) {
		free(headers);
		ixmlFreeDOMString(propertySet);
		free(servId_copy);
		free(UDN_copy);
		free(reference_count);
	}

	HandleUnlock();

	UpnpPrintf(UPNP_INFO, GENA, __FILE__, line,
		"GENA END NOTIFY ALL, ret = %d",
		ret);

	return ret;
}


/*!
 * \brief Returns OK message in the case of a subscription request.
 *
 * \return UPNP_E_SUCCESS if successful, otherwise the appropriate error code.
 */
static int respond_ok(
	/*! [in] Socket connection of request. */
	SOCKINFO *info,
	/*! [in] Accepted duration. */
	int time_out,
	/*! [in] Accepted subscription. */
	subscription *sub,
	/*! [in] Http request. */
	http_message_t *request)
{
    int major;
    int minor;
    membuffer response;
    int return_code;
    char timeout_str[100];
    int upnp_timeout = UPNP_TIMEOUT;
    int rc = 0;

    http_CalcResponseVersion( request->major_version,
                              request->minor_version, &major, &minor );

    if( time_out >= 0 ) {
        rc = snprintf( timeout_str, sizeof ( timeout_str ),
                       "TIMEOUT: Second-%d", time_out );
    } else {
        memset( timeout_str, 0, sizeof( timeout_str ) );
        strncpy( timeout_str, "TIMEOUT: Second-infinite",
                 sizeof ( timeout_str ) - 1);
    }
    if (rc < 0 || (unsigned int) rc >= sizeof ( timeout_str ) ) {
        error_respond( info, HTTP_INTERNAL_SERVER_ERROR, request ); 
        return UPNP_E_OUTOF_MEMORY;
    }

    membuffer_init( &response );
    response.size_inc = 30;
    if( http_MakeMessage(
        &response, major, minor,
        "R" "D" "S" "N" "Xc" "ssc" "scc",
        HTTP_OK,
        (off_t)0,
        X_USER_AGENT,
        "SID: ", sub->sid,
        timeout_str ) != 0 ) {
        membuffer_destroy( &response );
        error_respond( info, HTTP_INTERNAL_SERVER_ERROR, request );
        return UPNP_E_OUTOF_MEMORY;
    }

    return_code = http_SendMessage( info, &upnp_timeout, "b",
                                    response.buf, response.length );

    membuffer_destroy( &response );

    return return_code;
}


/*!
 * \brief Function to parse the Callback header value in subscription requests.
 *
 * Takes in a buffer containing URLS delimited by '<' and '>'. The entire buffer
 * is copied into dynamic memory and stored in the URL_list. Pointers to the
 * individual urls within this buffer are allocated and stored in the URL_list.
 * Only URLs with network addresses are considered (i.e. host:port or domain name).
 *
 * \return The number of URLs parsed if successful, otherwise UPNP_E_OUTOF_MEMORY.
 */
static int create_url_list(
	/*! [in] . */
	memptr *url_list,
	/*! [out] . */
	URL_list *out)
{
    size_t URLcount = 0, URLcount2 = 0;
    size_t i;
    int return_code = 0;
    uri_type temp;
    token urls;
    token *URLS;

    urls.buff = url_list->buf;
    urls.size = url_list->length;
    URLS = &urls;

    out->size = 0;
    out->URLs = NULL;
    out->parsedURLs = NULL;

    for( i = 0; i < URLS->size; i++ ) {
        if( ( URLS->buff[i] == '<' ) && ( i + 1 < URLS->size ) ) {
            if( ( ( return_code = parse_uri( &URLS->buff[i + 1],
                                             URLS->size - i + 1,
                                             &temp ) ) == HTTP_SUCCESS )
                && ( temp.hostport.text.size != 0 ) ) {
                URLcount++;
            } else {
                if( return_code == UPNP_E_OUTOF_MEMORY ) {
                    return return_code;
                }
            }
        }
    }

    if( URLcount > 0 ) {
        out->URLs = malloc(URLS->size + 1);
        out->parsedURLs = malloc(sizeof(uri_type) * URLcount);
        if (!out->URLs || !out->parsedURLs) {
            free(out->URLs);
            free(out->parsedURLs);
            out->URLs = NULL;
            out->parsedURLs = NULL;
            return UPNP_E_OUTOF_MEMORY;
        }
        memcpy( out->URLs, URLS->buff, URLS->size );
        out->URLs[URLS->size] = 0;
        for( i = 0; i < URLS->size; i++ ) {
            if( ( URLS->buff[i] == '<' ) && ( i + 1 < URLS->size ) ) {
                if( ( ( return_code =
                        parse_uri( &out->URLs[i + 1], URLS->size - i + 1,
                                   &out->parsedURLs[URLcount2] ) ) ==
                      HTTP_SUCCESS )
                    && ( out->parsedURLs[URLcount2].hostport.text.size !=
                         0 ) ) {
                    URLcount2++;
                    if (URLcount2 >= URLcount)
                        /*
                         * break early here in case there is a bogus URL that
                         * was skipped above. This prevents to access
                         * out->parsedURLs[URLcount] which is beyond the
                         * allocation.
                         */
                        break;
                } else {
                    if( return_code == UPNP_E_OUTOF_MEMORY ) {
                        free( out->URLs );
                        free( out->parsedURLs );
                        out->URLs = NULL;
                        out->parsedURLs = NULL;
                        return return_code;
                    }
                }
            }
        }
    }
    out->size = URLcount;

    return (int)URLcount;
}


void gena_process_subscription_request(
	SOCKINFO *info,
	http_message_t *request)
{
	struct Upnp_Subscription_Request request_struct;
	Upnp_SID temp_sid;
	int return_code = 1;
	int time_out = 1801;
	service_info *service;
	subscription *sub;
	uuid_upnp uid;
	struct Handle_Info *handle_info;
	void *cookie;
	Upnp_FunPtr callback_fun;
	UpnpDevice_Handle device_handle;
	memptr nt_hdr;
	char *event_url_path = NULL;
	memptr callback_hdr;
	memptr timeout_hdr;
	int rc = 0;

	memset(&request_struct, 0, sizeof(request_struct));

	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"Subscription Request Received:\n");

	if (httpmsg_find_hdr(request, HDR_NT, &nt_hdr) == NULL) {
		error_respond(info, HTTP_BAD_REQUEST, request);
		goto exit_function;
	}

	/* check NT header */
	/* Windows Millenium Interoperability: */
	/* we accept either upnp:event, or upnp:propchange for the NT header */
	if (memptr_cmp_nocase(&nt_hdr, "upnp:event") != 0) {
		error_respond(info, HTTP_PRECONDITION_FAILED, request);
		goto exit_function;
	}

	/* if a SID is present then the we have a bad request "incompatible headers" */
	if (httpmsg_find_hdr(request, HDR_SID, NULL) != NULL) {
		error_respond(info, HTTP_BAD_REQUEST, request);
		goto exit_function;
	}
	/* look up service by eventURL */
	event_url_path = str_alloc(request->uri.pathquery.buff, request->uri.pathquery.size);
	if (event_url_path == NULL) {
		error_respond(info, HTTP_INTERNAL_SERVER_ERROR, request);
		goto exit_function;
	}

	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"SubscriptionRequest for event URL path: %s\n",
		event_url_path);

	HandleLock();

	/* CURRENTLY, ONLY ONE DEVICE */
	if (GetDeviceHandleInfo(info->foreign_sockaddr.ss_family , 
	    &device_handle, &handle_info) != HND_DEVICE) {
		free(event_url_path);
		error_respond(info, HTTP_INTERNAL_SERVER_ERROR, request);
		HandleUnlock();
		goto exit_function;
	}
	service = FindServiceEventURLPath(&handle_info->ServiceTable, event_url_path);
	free(event_url_path);

	if (service == NULL || !service->active) {
		error_respond(info, HTTP_NOT_FOUND, request);
		HandleUnlock();
		goto exit_function;
	}

	UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__,
		"Subscription Request: Number of Subscriptions already %d\n "
		"Max Subscriptions allowed: %d\n",
		service->TotalSubscriptions,
		handle_info->MaxSubscriptions);

	/* too many subscriptions */
	if (handle_info->MaxSubscriptions != -1 &&
	    service->TotalSubscriptions >= handle_info->MaxSubscriptions) {
		error_respond(info, HTTP_INTERNAL_SERVER_ERROR, request);
		HandleUnlock();
		goto exit_function;
	}
	/* generate new subscription */
	sub = (subscription *)malloc(sizeof (subscription));
	if (sub == NULL) {
		error_respond(info, HTTP_INTERNAL_SERVER_ERROR, request);
		HandleUnlock();
		goto exit_function;
	}
	sub->eventKey = 0;
	sub->ToSendEventKey = 0;
	sub->active = 0;
	sub->next = NULL;
	sub->DeliveryURLs.size = 0;
	sub->DeliveryURLs.URLs = NULL;
	sub->DeliveryURLs.parsedURLs = NULL;

	/* check for valid callbacks */
	if (httpmsg_find_hdr( request, HDR_CALLBACK, &callback_hdr) == NULL) {
		error_respond(info, HTTP_PRECONDITION_FAILED, request);
		freeSubscriptionList(sub);
		HandleUnlock();
		goto exit_function;
	}
	return_code = create_url_list(&callback_hdr, &sub->DeliveryURLs);
	if (return_code == 0) {
		error_respond(info, HTTP_PRECONDITION_FAILED, request);
		freeSubscriptionList(sub);
		HandleUnlock();
		goto exit_function;
	}
	if (return_code == UPNP_E_OUTOF_MEMORY) {
		error_respond(info, HTTP_INTERNAL_SERVER_ERROR, request);
		freeSubscriptionList(sub);
		HandleUnlock();
		goto exit_function;
	}
	/* set the timeout */
	if (httpmsg_find_hdr(request, HDR_TIMEOUT, &timeout_hdr) != NULL) {
		if (matchstr(timeout_hdr.buf, timeout_hdr.length,
		    "%iSecond-%d%0", &time_out) == PARSE_OK) {
			/* nothing */
		} else if(memptr_cmp_nocase(&timeout_hdr, "Second-infinite") == 0) {
			/* infinite timeout */
			time_out = -1;
		} else {
			/* default is > 1800 seconds */
			time_out = DEFAULT_TIMEOUT;
		}
	}
	/* replace infinite timeout with max timeout, if possible */
	if (handle_info->MaxSubscriptionTimeOut != -1) {
		if (time_out == -1 ||
		    time_out > handle_info->MaxSubscriptionTimeOut) {
			time_out = handle_info->MaxSubscriptionTimeOut;
		}
	}
	if (time_out >= 0) {
		sub->expireTime = time(NULL) + time_out;
	} else {
		/* infinite time */
		sub->expireTime = 0;
	}

	/* generate SID */
	uuid_create(&uid);
	uuid_unpack(&uid, temp_sid);
	rc = snprintf(sub->sid, sizeof(sub->sid), "uuid:%s", temp_sid);

	/* respond OK */
	if (rc < 0 || (unsigned int) rc >= sizeof(sub->sid) ||
		(respond_ok(info, time_out,
		sub, request) != UPNP_E_SUCCESS)) {
		freeSubscriptionList(sub);
		HandleUnlock();
		goto exit_function;
	}
	/* add to subscription list */
	sub->next = service->subscriptionList;
	service->subscriptionList = sub;
	service->TotalSubscriptions++;

	/* finally generate callback for init table dump */
	request_struct.ServiceId = service->serviceId;
	request_struct.UDN = service->UDN;
	strncpy((char *)request_struct.Sid, sub->sid,
		sizeof(request_struct.Sid) - 1);

	/* copy callback */
	callback_fun = handle_info->Callback;
	cookie = handle_info->Cookie;

	HandleUnlock();

	/* make call back with request struct */
	/* in the future should find a way of mainting that the handle */
	/* is not unregistered in the middle of a callback */
	callback_fun(UPNP_EVENT_SUBSCRIPTION_REQUEST, &request_struct, cookie);

exit_function:
	return;
}


void gena_process_subscription_renewal_request(
	SOCKINFO *info,
	http_message_t *request)
{
    Upnp_SID sid;
    subscription *sub;
    int time_out = 1801;
    service_info *service;
    struct Handle_Info *handle_info;
    UpnpDevice_Handle device_handle;
    memptr temp_hdr;
    membuffer event_url_path;
    memptr timeout_hdr;

    /* if a CALLBACK or NT header is present, then it is an error */
    if( httpmsg_find_hdr( request, HDR_CALLBACK, NULL ) != NULL ||
        httpmsg_find_hdr( request, HDR_NT, NULL ) != NULL ) {
        error_respond( info, HTTP_BAD_REQUEST, request );
        return;
    }
    /* get SID */
    if( httpmsg_find_hdr( request, HDR_SID, &temp_hdr ) == NULL ||
        temp_hdr.length > SID_SIZE ) {
        error_respond( info, HTTP_PRECONDITION_FAILED, request );
        return;
    }
    memcpy( sid, temp_hdr.buf, temp_hdr.length );
    sid[temp_hdr.length] = '\0';

    /* lookup service by eventURL */
    membuffer_init( &event_url_path );
    if( membuffer_append( &event_url_path, request->uri.pathquery.buff,
                          request->uri.pathquery.size ) != 0 ) {
        error_respond( info, HTTP_INTERNAL_SERVER_ERROR, request );
        return;
    }

    HandleLock();

    /* CURRENTLY, ONLY SUPPORT ONE DEVICE */
    if( GetDeviceHandleInfo( info->foreign_sockaddr.ss_family,
        &device_handle, &handle_info ) != HND_DEVICE ) {
        error_respond( info, HTTP_PRECONDITION_FAILED, request );
        membuffer_destroy( &event_url_path );
        HandleUnlock();
        return;
    }
    service = FindServiceEventURLPath( &handle_info->ServiceTable,
                                       event_url_path.buf );
    membuffer_destroy( &event_url_path );

    /* get subscription */
    if( service == NULL ||
        !service->active ||
        ( ( sub = GetSubscriptionSID( sid, service ) ) == NULL ) ) {
        error_respond( info, HTTP_PRECONDITION_FAILED, request );
        HandleUnlock();
        return;
    }

    UpnpPrintf( UPNP_INFO, GENA, __FILE__, __LINE__,
        "Renew request: Number of subscriptions already: %d\n "
        "Max Subscriptions allowed:%d\n",
        service->TotalSubscriptions,
        handle_info->MaxSubscriptions );
    /* too many subscriptions */
    if( handle_info->MaxSubscriptions != -1 &&
            service->TotalSubscriptions > handle_info->MaxSubscriptions ) {
        error_respond( info, HTTP_INTERNAL_SERVER_ERROR, request );
        RemoveSubscriptionSID( sub->sid, service );
        HandleUnlock();
        return;
    }
    /* set the timeout */
    if( httpmsg_find_hdr( request, HDR_TIMEOUT, &timeout_hdr ) != NULL ) {
        if( matchstr( timeout_hdr.buf, timeout_hdr.length,
                      "%iSecond-%d%0", &time_out ) == PARSE_OK ) {

            /*nothing */

        } else if( memptr_cmp_nocase( &timeout_hdr, "Second-infinite" ) ==
                   0 ) {

            time_out = -1;      /* inifinite timeout */

        } else {
            time_out = DEFAULT_TIMEOUT; /* default is > 1800 seconds */

        }
    }

    /* replace infinite timeout with max timeout, if possible */
    if( handle_info->MaxSubscriptionTimeOut != -1 ) {
        if( time_out == -1 ||
            time_out > handle_info->MaxSubscriptionTimeOut ) {
            time_out = handle_info->MaxSubscriptionTimeOut;
        }
    }

    if( time_out == -1 ) {
        sub->expireTime = 0;
    } else {
        sub->expireTime = time( NULL ) + time_out;
    }

    if( respond_ok( info, time_out, sub, request ) != UPNP_E_SUCCESS ) {
        RemoveSubscriptionSID( sub->sid, service );
    }

    HandleUnlock();
}


void gena_process_unsubscribe_request(
	SOCKINFO *info,
	http_message_t *request)
{
    Upnp_SID sid;
    service_info *service;
    struct Handle_Info *handle_info;
    UpnpDevice_Handle device_handle;

    memptr temp_hdr;
    membuffer event_url_path;

    /* if a CALLBACK or NT header is present, then it is an error */
    if( httpmsg_find_hdr( request, HDR_CALLBACK, NULL ) != NULL ||
        httpmsg_find_hdr( request, HDR_NT, NULL ) != NULL ) {
        error_respond( info, HTTP_BAD_REQUEST, request );
        return;
    }
    /* get SID */
    if( httpmsg_find_hdr( request, HDR_SID, &temp_hdr ) == NULL ||
        temp_hdr.length > SID_SIZE ) {
        error_respond( info, HTTP_PRECONDITION_FAILED, request );
        return;
    }
    memcpy( sid, temp_hdr.buf, temp_hdr.length );
    sid[temp_hdr.length] = '\0';

    /* lookup service by eventURL */
    membuffer_init( &event_url_path );
    if( membuffer_append( &event_url_path, request->uri.pathquery.buff,
                          request->uri.pathquery.size ) != 0 ) {
        error_respond( info, HTTP_INTERNAL_SERVER_ERROR, request );
        return;
    }

    HandleLock();

    /* CURRENTLY, ONLY SUPPORT ONE DEVICE */
    if( GetDeviceHandleInfo( info->foreign_sockaddr.ss_family,
        &device_handle, &handle_info ) != HND_DEVICE ) {
        error_respond( info, HTTP_PRECONDITION_FAILED, request );
        membuffer_destroy( &event_url_path );
        HandleUnlock();
        return;
    }
    service = FindServiceEventURLPath( &handle_info->ServiceTable,
                                       event_url_path.buf );
    membuffer_destroy( &event_url_path );

    /* validate service */
    if( service == NULL ||
        !service->active || GetSubscriptionSID( sid, service ) == NULL )
    {
        error_respond( info, HTTP_PRECONDITION_FAILED, request );
        HandleUnlock();
        return;
    }

    RemoveSubscriptionSID(sid, service);
    error_respond(info, HTTP_OK, request);    /* success */

    HandleUnlock();
}


#endif /* INCLUDE_DEVICE_APIS */
#endif /* EXCLUDE_GENA */

