/************************************************************************
* Function : gena_process_notification_event
*
* Parameters:
* IN SOCKINFO *info: Socket structure containing the device socket
* information
* IN http_message_t* event: The http message contains the GENA
* notification
*
* Description:
* This function processes NOTIFY events that are sent by devices.
* called by genacallback()
*
* Returns: void
*
* Note : called by genacallback()
****************************************************************************/
void
gena_process_notification_event( IN SOCKINFO * info,
IN http_message_t * event )
{
struct Upnp_Event event_struct;
int eventKey;
token sid;
client_subscription *subscription;
IXML_Document *ChangedVars;
struct Handle_Info *handle_info;
void *cookie;
Upnp_FunPtr callback;
UpnpClient_Handle client_handle;
memptr sid_hdr;
memptr nt_hdr,
nts_hdr;
memptr seq_hdr;
// get SID
if( httpmsg_find_hdr( event, HDR_SID, &sid_hdr ) == NULL ) {
error_respond( info, HTTP_PRECONDITION_FAILED, event );
return;
}
sid.buff = sid_hdr.buf;
sid.size = sid_hdr.length;
// get event key
if( httpmsg_find_hdr( event, HDR_SEQ, &seq_hdr ) == NULL ||
matchstr( seq_hdr.buf, seq_hdr.length, "%d%0", &eventKey )
!= PARSE_OK ) {
error_respond( info, HTTP_BAD_REQUEST, event );
return;
}
// get NT and NTS headers
if( httpmsg_find_hdr( event, HDR_NT, &nt_hdr ) == NULL ||
httpmsg_find_hdr( event, HDR_NTS, &nts_hdr ) == NULL ) {
error_respond( info, HTTP_BAD_REQUEST, event );
return;
}
// verify NT and NTS headers
if( memptr_cmp( &nt_hdr, "upnp:event" ) != 0 ||
memptr_cmp( &nts_hdr, "upnp:propchange" ) != 0 ) {
error_respond( info, HTTP_PRECONDITION_FAILED, event );
return;
}
// parse the content (should be XML)
if( !has_xml_content_type( event ) ||
event->msg.length == 0 ||
( ixmlParseBufferEx( event->entity.buf, &ChangedVars ) ) !=
IXML_SUCCESS ) {
error_respond( info, HTTP_BAD_REQUEST, event );
return;
}
HandleLock( );
// get client info
if( GetClientHandleInfo( &client_handle, &handle_info ) != HND_CLIENT ) {
error_respond( info, HTTP_PRECONDITION_FAILED, event );
HandleUnlock( );
ixmlDocument_free( ChangedVars );
return;
}
// get subscription based on SID
if( ( subscription = GetClientSubActualSID( handle_info->ClientSubList,
&sid ) ) == NULL ) {
if( eventKey == 0 ) {
// wait until we've finished processing a subscription
// (if we are in the middle)
// this is to avoid mistakenly rejecting the first event if we
// receive it before the subscription response
HandleUnlock( );
// try and get Subscription Lock
// (in case we are in the process of subscribing)
SubscribeLock( );
// get HandleLock again
HandleLock( );
if( GetClientHandleInfo( &client_handle, &handle_info )
!= HND_CLIENT ) {
error_respond( info, HTTP_PRECONDITION_FAILED, event );
SubscribeUnlock( );
HandleUnlock( );
ixmlDocument_free( ChangedVars );
return;
}
if( ( subscription =
GetClientSubActualSID( handle_info->ClientSubList,
&sid ) ) == NULL ) {
error_respond( info, HTTP_PRECONDITION_FAILED, event );
SubscribeUnlock( );
HandleUnlock( );
ixmlDocument_free( ChangedVars );
return;
}
SubscribeUnlock( );
} else {
error_respond( info, HTTP_PRECONDITION_FAILED, event );
HandleUnlock( );
ixmlDocument_free( ChangedVars );
return;
}
}
error_respond( info, HTTP_OK, event ); // success
// fill event struct
strcpy( event_struct.Sid, subscription->sid );
event_struct.EventKey = eventKey;
event_struct.ChangedVariables = ChangedVars;
// copy callback
callback = handle_info->Callback;
cookie = handle_info->Cookie;
HandleUnlock( );
// make callback with event struct
// In future, should find a way of mainting
// that the handle is not unregistered in the middle of a
// callback
callback( UPNP_EVENT_RECEIVED, &event_struct, cookie );
ixmlDocument_free( ChangedVars );
}
void gena_process_notification_event(
SOCKINFO *info,
http_message_t *event)
{
struct Upnp_Event event_struct;
IXML_Document *ChangedVars = NULL;
int eventKey;
token sid;
ClientSubscription *subscription = NULL;
struct Handle_Info *handle_info;
void *cookie;
Upnp_FunPtr callback;
UpnpClient_Handle client_handle;
const UpnpString *tmpSID = NULL;
memptr sid_hdr;
memptr nt_hdr,
nts_hdr;
memptr seq_hdr;
/* get SID */
if (httpmsg_find_hdr(event, HDR_SID, &sid_hdr) == NULL) {
error_respond(info, HTTP_PRECONDITION_FAILED, event);
goto exit_function;
}
sid.buff = sid_hdr.buf;
sid.size = sid_hdr.length;
/* get event key */
if (httpmsg_find_hdr(event, HDR_SEQ, &seq_hdr) == NULL ||
matchstr(seq_hdr.buf, seq_hdr.length, "%d%0", &eventKey) != PARSE_OK) {
error_respond( info, HTTP_BAD_REQUEST, event );
goto exit_function;
}
/* get NT and NTS headers */
if (httpmsg_find_hdr(event, HDR_NT, &nt_hdr) == NULL ||
httpmsg_find_hdr(event, HDR_NTS, &nts_hdr) == NULL) {
error_respond( info, HTTP_BAD_REQUEST, event );
goto exit_function;
}
/* verify NT and NTS headers */
if (memptr_cmp(&nt_hdr, "upnp:event") != 0 ||
memptr_cmp(&nts_hdr, "upnp:propchange") != 0) {
error_respond(info, HTTP_PRECONDITION_FAILED, event);
goto exit_function;
}
/* parse the content (should be XML) */
if (!has_xml_content_type(event) ||
event->msg.length == 0 ||
ixmlParseBufferEx(event->entity.buf, &ChangedVars) != IXML_SUCCESS) {
error_respond(info, HTTP_BAD_REQUEST, event);
goto exit_function;
}
HandleLock();
/* get client info */
if (GetClientHandleInfo(&client_handle, &handle_info) != HND_CLIENT) {
error_respond(info, HTTP_PRECONDITION_FAILED, event);
HandleUnlock();
goto exit_function;
}
/* get subscription based on SID */
subscription = GetClientSubActualSID(handle_info->ClientSubList, &sid);
if (subscription == NULL) {
if (eventKey == 0) {
/* wait until we've finished processing a subscription */
/* (if we are in the middle) */
/* this is to avoid mistakenly rejecting the first event if we */
/* receive it before the subscription response */
HandleUnlock();
/* try and get Subscription Lock */
/* (in case we are in the process of subscribing) */
SubscribeLock();
/* get HandleLock again */
HandleLock();
if (GetClientHandleInfo(&client_handle, &handle_info) != HND_CLIENT) {
error_respond(info, HTTP_PRECONDITION_FAILED, event);
SubscribeUnlock();
HandleUnlock();
goto exit_function;
}
subscription = GetClientSubActualSID(handle_info->ClientSubList, &sid);
if (subscription == NULL) {
error_respond( info, HTTP_PRECONDITION_FAILED, event );
SubscribeUnlock();
HandleUnlock();
goto exit_function;
}
SubscribeUnlock();
} else {
error_respond( info, HTTP_PRECONDITION_FAILED, event );
HandleUnlock();
goto exit_function;
}
}
/* success */
error_respond(info, HTTP_OK, event);
/* fill event struct */
tmpSID = UpnpClientSubscription_get_SID(subscription);
memset(event_struct.Sid, 0, sizeof(event_struct.Sid));
strncpy(event_struct.Sid, UpnpString_get_String(tmpSID),
sizeof(event_struct.Sid) - 1);
event_struct.EventKey = eventKey;
event_struct.ChangedVariables = ChangedVars;
/* copy callback */
callback = handle_info->Callback;
cookie = handle_info->Cookie;
HandleUnlock();
/* make callback with event struct */
/* In future, should find a way of mainting */
/* that the handle is not unregistered in the middle of a */
/* callback */
callback(UPNP_EVENT_RECEIVED, &event_struct, cookie);
exit_function:
ixmlDocument_free(ChangedVars);
}
/************************************************************************
* Function : genaSubscribe
*
* Parameters:
* IN UpnpClient_Handle client_handle:
* IN char * PublisherURL: NULL Terminated, of the form :
* "http://134.134.156.80:4000/RedBulb/Event"
* INOUT int * TimeOut: requested Duration, if -1, then "infinite".
* in the OUT case: actual Duration granted
* by Service, -1 for infinite
* OUT Upnp_SID out_sid:sid of subscription, memory passed in by caller
*
* Description:
* This function subscribes to a PublisherURL ( also mentioned as EventURL
* some places). It sends SUBSCRIBE http request to service processes
* request. Finally adds a Subscription to
* the clients subscription list, if service responds with OK
*
* Returns: int
* return UPNP_E_SUCCESS if service response is OK else
* returns appropriate error
***************************************************************************/
int
genaSubscribe( IN UpnpClient_Handle client_handle,
IN char *PublisherURL,
INOUT int *TimeOut,
OUT Upnp_SID out_sid )
{
int return_code = GENA_SUCCESS;
client_subscription *newSubscription = NULL;
uuid_upnp uid;
Upnp_SID temp_sid;
char *ActualSID = NULL;
struct Handle_Info *handle_info;
char *EventURL = NULL;
DBGONLY( UpnpPrintf( UPNP_INFO, GENA, __FILE__, __LINE__,
"GENA SUBSCRIBE BEGIN" ) );
HandleLock( );
memset( out_sid, 0, sizeof( Upnp_SID ) );
// validate handle
if( GetHandleInfo( client_handle, &handle_info ) != HND_CLIENT ) {
HandleUnlock( );
return GENA_E_BAD_HANDLE;
}
HandleUnlock( );
// subscribe
SubscribeLock( );
return_code =
gena_subscribe( PublisherURL, TimeOut, NULL, &ActualSID );
HandleLock( );
if( return_code != UPNP_E_SUCCESS ) {
DBGONLY( UpnpPrintf( UPNP_CRITICAL, GENA, __FILE__, __LINE__,
"SUBSCRIBE FAILED in transfer error code: %d returned\n",
return_code ) );
goto error_handler;
}
if( GetHandleInfo( client_handle, &handle_info ) != HND_CLIENT ) {
return_code = GENA_E_BAD_HANDLE;
goto error_handler;
}
// generate client SID
uuid_create( &uid );
uuid_unpack( &uid, temp_sid );
sprintf( out_sid, "uuid:%s", temp_sid );
// create event url
EventURL = ( char * )malloc( strlen( PublisherURL ) + 1 );
if( EventURL == NULL ) {
return_code = UPNP_E_OUTOF_MEMORY;
goto error_handler;
}
strcpy( EventURL, PublisherURL );
// fill subscription
newSubscription =
( client_subscription * ) malloc( sizeof( client_subscription ) );
if( newSubscription == NULL ) {
return_code = UPNP_E_OUTOF_MEMORY;
goto error_handler;
}
newSubscription->EventURL = EventURL;
newSubscription->ActualSID = ActualSID;
strcpy( newSubscription->sid, out_sid );
newSubscription->RenewEventId = -1;
newSubscription->next = handle_info->ClientSubList;
handle_info->ClientSubList = newSubscription;
// schedule expiration event
return_code = ScheduleGenaAutoRenew( client_handle, *TimeOut,
newSubscription );
error_handler:
if( return_code != UPNP_E_SUCCESS ) {
free( ActualSID );
free( EventURL );
free( newSubscription );
}
HandleUnlock( );
SubscribeUnlock( );
return return_code;
}
int genaSubscribe(
UpnpClient_Handle client_handle,
const UpnpString *PublisherURL,
int *TimeOut,
UpnpString *out_sid)
{
int return_code = GENA_SUCCESS;
ClientSubscription *newSubscription = UpnpClientSubscription_new();
uuid_upnp uid;
Upnp_SID temp_sid;
Upnp_SID temp_sid2;
UpnpString *ActualSID = UpnpString_new();
UpnpString *EventURL = UpnpString_new();
struct Handle_Info *handle_info;
int rc = 0;
memset(temp_sid, 0, sizeof(temp_sid));
memset(temp_sid2, 0, sizeof(temp_sid2));
UpnpPrintf(UPNP_INFO, GENA, __FILE__, __LINE__, "GENA SUBSCRIBE BEGIN");
UpnpString_clear(out_sid);
HandleReadLock();
/* validate handle */
if (GetHandleInfo(client_handle, &handle_info) != HND_CLIENT) {
return_code = GENA_E_BAD_HANDLE;
SubscribeLock();
goto error_handler;
}
HandleUnlock();
/* subscribe */
SubscribeLock();
return_code = gena_subscribe(PublisherURL, TimeOut, NULL, ActualSID);
HandleLock();
if (return_code != UPNP_E_SUCCESS) {
UpnpPrintf( UPNP_CRITICAL, GENA, __FILE__, __LINE__,
"SUBSCRIBE FAILED in transfer error code: %d returned\n",
return_code );
goto error_handler;
}
if(GetHandleInfo(client_handle, &handle_info) != HND_CLIENT) {
return_code = GENA_E_BAD_HANDLE;
goto error_handler;
}
/* generate client SID */
uuid_create(&uid );
uuid_unpack(&uid, temp_sid);
rc = snprintf(temp_sid2, sizeof(temp_sid2), "uuid:%s", temp_sid);
if (rc < 0 || (unsigned int) rc >= sizeof(temp_sid2)) {
return_code = UPNP_E_OUTOF_MEMORY;
goto error_handler;
}
UpnpString_set_String(out_sid, temp_sid2);
/* create event url */
UpnpString_assign(EventURL, PublisherURL);
/* fill subscription */
if (newSubscription == NULL) {
return_code = UPNP_E_OUTOF_MEMORY;
goto error_handler;
}
UpnpClientSubscription_set_RenewEventId(newSubscription, -1);
UpnpClientSubscription_set_SID(newSubscription, out_sid);
UpnpClientSubscription_set_ActualSID(newSubscription, ActualSID);
UpnpClientSubscription_set_EventURL(newSubscription, EventURL);
UpnpClientSubscription_set_Next(newSubscription, handle_info->ClientSubList);
handle_info->ClientSubList = newSubscription;
/* schedule expiration event */
return_code = ScheduleGenaAutoRenew(client_handle, *TimeOut, newSubscription);
error_handler:
UpnpString_delete(ActualSID);
UpnpString_delete(EventURL);
if (return_code != UPNP_E_SUCCESS)
UpnpClientSubscription_delete(newSubscription);
HandleUnlock();
SubscribeUnlock();
return return_code;
}
