service_table.c

电驴下载工具eMule0.47aVeryCD的源代码,可作分析测试也可用于P2P软件的开发研究.

/************************************************************************
*	Function :	FindServiceControlURLPath
*
*	Parameters :
*		service_table * table ;	service table
*		char * controlURLPath ;	control URL path used to find a service 
*								from the table  
*
*	Description :	Traverses the service table and finds the node whose
*		control URL Path matches a know value 
*
*	Return : service_info * - pointer to the service list node from the 
*		service table whose control URL Path matches a known value;
*
*	Note :
************************************************************************/
service_info *
FindServiceControlURLPath( service_table * table,
                           char *controlURLPath )
{
    service_info *finger = NULL;
    uri_type parsed_url;
    uri_type parsed_url_in;

    if( ( table )
        &&
        ( parse_uri
          ( controlURLPath, strlen( controlURLPath ),
            &parsed_url_in ) ) ) {
        finger = table->serviceList;
        while( finger ) {
            if( finger->controlURL )
                if( ( parse_uri
                      ( finger->controlURL, strlen( finger->controlURL ),
                        &parsed_url ) ) ) {
                    if( !token_cmp
                        ( &parsed_url.pathquery,
                          &parsed_url_in.pathquery ) )
                        return finger;
                }
            finger = finger->next;
        }
    }

    return NULL;

}

/************************************************************************
*	Function :	printService
*
*	Parameters :
*		service_info *service ;Service whose information is to be printed
*		Dbg_Level level ; Debug level specified to the print function
*		Dbg_Module module ;	Debug module specified to the print function
*
*	Description :	For debugging purposes prints information from the 
*		service passed into the function.
*
*	Return : void ;
*
*	Note :
************************************************************************/
DBGONLY( void printService( service_info * service, Dbg_Level level,
                            Dbg_Module module ) {
         if( service ) {
         if( service->serviceType )
         UpnpPrintf( level, module, __FILE__, __LINE__,
                     "serviceType: %s\n", service->serviceType );
         if( service->serviceId )
         UpnpPrintf( level, module, __FILE__, __LINE__, "serviceId: %s\n",
                     service->serviceId ); if( service->SCPDURL )
         UpnpPrintf( level, module, __FILE__, __LINE__, "SCPDURL: %s\n",
                     service->SCPDURL ); if( service->controlURL )
         UpnpPrintf( level, module, __FILE__, __LINE__, "controlURL: %s\n",
                     service->controlURL ); if( service->eventURL )
         UpnpPrintf( level, module, __FILE__, __LINE__, "eventURL: %s\n",
                     service->eventURL ); if( service->UDN )
         UpnpPrintf( level, module, __FILE__, __LINE__, "UDN: %s\n\n",
                     service->UDN ); if( service->active )
         UpnpPrintf( level, module, __FILE__, __LINE__,
                     "Service is active\n" );
         else
         UpnpPrintf( level, module, __FILE__, __LINE__,
                     "Service is inactive\n" );}
         }

 )

/************************************************************************
*	Function :	printServiceList
*
*	Parameters :
*		service_info *service ;	Service whose information is to be printed
*		Dbg_Level level ;	Debug level specified to the print function
*		Dbg_Module module ;	Debug module specified to the print function
*
*	Description :	For debugging purposes prints information of each 
*		service from the service table passed into the function.
*
*	Return : void ;
*
*	Note :
************************************************************************/
    DBGONLY( void printServiceList( service_info * service,
                                    Dbg_Level level,
                                    Dbg_Module module ) {
             while( service ) {
             if( service->serviceType )
             UpnpPrintf( level, module, __FILE__, __LINE__,
                         "serviceType: %s\n", service->serviceType );
             if( service->serviceId )
             UpnpPrintf( level, module, __FILE__, __LINE__,
                         "serviceId: %s\n", service->serviceId );
             if( service->SCPDURL )
             UpnpPrintf( level, module, __FILE__, __LINE__,
                         "SCPDURL: %s\n", service->SCPDURL );
             if( service->controlURL )
             UpnpPrintf( level, module, __FILE__, __LINE__,
                         "controlURL: %s\n", service->controlURL );
             if( service->eventURL )
             UpnpPrintf( level, module, __FILE__, __LINE__,
                         "eventURL: %s\n", service->eventURL );
             if( service->UDN )
             UpnpPrintf( level, module, __FILE__, __LINE__, "UDN: %s\n\n",
                         service->UDN ); if( service->active )
             UpnpPrintf( level, module, __FILE__, __LINE__,
                         "Service is active\n" );
             else
             UpnpPrintf( level, module, __FILE__, __LINE__,
                         "Service is inactive\n" );
             service = service->next;}
             }
 )

/************************************************************************
*	Function :	printServiceTable
*
*	Parameters :
*		service_table * table ;	Service table to be printed
*		Dbg_Level level ;	Debug level specified to the print function
*		Dbg_Module module ;	Debug module specified to the print function
*
*	Description :	For debugging purposes prints the URL base of the table
*		and information of each service from the service table passed into 
*		the function.
*
*	Return : void ;
*
*	Note :
************************************************************************/
    DBGONLY( void printServiceTable( service_table * table,
                                     Dbg_Level level,
                                     Dbg_Module module ) {
             UpnpPrintf( level, module, __FILE__, __LINE__,
                         "URL_BASE: %s\n", table->URLBase );
             UpnpPrintf( level, module, __FILE__, __LINE__,
                         "Services: \n" );
             printServiceList( table->serviceList, level, module );}
 )

/************************************************************************
*	Function :	freeService
*
*	Parameters :
*		service_info *in ;	service information that is to be freed
*
*	Description :	Free's memory allocated for the various components 
*		of the service entry in the service table.
*
*	Return : void ;
*
*	Note :
************************************************************************/
     void freeService( service_info * in )
{
    if( in ) {
        if( in->serviceType )
            ixmlFreeDOMString( in->serviceType );

        if( in->serviceId )
            ixmlFreeDOMString( in->serviceId );

        if( in->SCPDURL )
            free( in->SCPDURL );

        if( in->controlURL )
            free( in->controlURL );

        if( in->eventURL )
            free( in->eventURL );

        if( in->UDN )
            ixmlFreeDOMString( in->UDN );

        if( in->subscriptionList )
            freeSubscriptionList( in->subscriptionList );

        in->TotalSubscriptions = 0;
        free( in );
    }
}

/************************************************************************
*	Function :	freeServiceList
*
*	Parameters :
*		service_info * head ;	Head of the service list to be freed
*
*	Description :	Free's memory allocated for the various components 
*		of each service entry in the service table.
*
*	Return : void ;
*
*	Note :
************************************************************************/
void
freeServiceList( service_info * head )
{
    service_info *next = NULL;

    while( head ) {
        if( head->serviceType )
            ixmlFreeDOMString( head->serviceType );
        if( head->serviceId )
            ixmlFreeDOMString( head->serviceId );
        if( head->SCPDURL )
            free( head->SCPDURL );
        if( head->controlURL )
            free( head->controlURL );
        if( head->eventURL )
            free( head->eventURL );
        if( head->UDN )
            ixmlFreeDOMString( head->UDN );
        if( head->subscriptionList )
            freeSubscriptionList( head->subscriptionList );

        head->TotalSubscriptions = 0;
        next = head->next;
        free( head );
        head = next;
    }
}

/************************************************************************
*	Function :	freeServiceTable
*
*	Parameters :
*		service_table * table ;	Service table whose memory needs to be 
*								freed
*
*	Description : Free's dynamic memory in table.
*		(does not free table, only memory within the structure)
*
*	Return : void ;
*
*	Note :
************************************************************************/
void
freeServiceTable( service_table * table )
{
    ixmlFreeDOMString( table->URLBase );
    freeServiceList( table->serviceList );
    table->serviceList = NULL;
    table->endServiceList = NULL;
}

/************************************************************************
*	Function :	getElementValue
*
*	Parameters :
*		IXML_Node *node ;	Input node which provides the list of child 
*							nodes
*
*	Description :	Returns the clone of the element value
*
*	Return : DOMString ;
*
*	Note : value must be freed with DOMString_free
************************************************************************/
DOMString
getElementValue( IXML_Node * node )
{
    IXML_Node *child = ( IXML_Node * ) ixmlNode_getFirstChild( node );
    DOMString temp = NULL;

    if( ( child != 0 ) && ( ixmlNode_getNodeType( child ) == eTEXT_NODE ) ) {
        temp = ixmlNode_getNodeValue( child );
        return ixmlCloneDOMString( temp );
    } else {
        return NULL;
    }
}

/************************************************************************
*	Function :	getSubElement
*
*	Parameters :
*		const char *element_name ;	sub element name to be searched for
*		IXML_Node *node ;	Input node which provides the list of child 
*							nodes
*		IXML_Node **out ;	Ouput node to which the matched child node is
*							returned.
*
*	Description :	Traverses through a list of XML nodes to find the 
*		node with the known element name.
*
*	Return : int ;
*		1 - On Success
*		0 - On Failure
*
*	Note :
************************************************************************/
int
getSubElement( const char *element_name,
               IXML_Node * node,
               IXML_Node ** out )
{

    const DOMString NodeName = NULL;
    int found = 0;

    IXML_Node *child = ( IXML_Node * ) ixmlNode_getFirstChild( node );

    ( *out ) = NULL;

    while( ( child != NULL ) && ( !found ) ) {

        switch ( ixmlNode_getNodeType( child ) ) {
            case eELEMENT_NODE:

                NodeName = ixmlNode_getNodeName( child );
                if( !strcmp( NodeName, element_name ) ) {
                    ( *out ) = child;
                    found = 1;
                    return found;
                }
                break;

            default:
                break;
        }

        child = ( IXML_Node * ) ixmlNode_getNextSibling( child );
    }

    return found;
}

/************************************************************************
*	Function :	getServiceList
*
*	Parameters :
*		IXML_Node *node ;	XML node information
*		service_info **end ; service added is returned to the output
*							parameter
*		char * URLBase ;	provides Base URL to resolve relative URL 
*
*	Description :	Returns pointer to service info after getting the 
*		sub-elements of the service info. 
*
*	Return : service_info * - pointer to the service info node ;
*
*	Note :
************************************************************************/
service_info *
getServiceList( IXML_Node * node,
                service_info ** end,
                char *URLBase )
{
    IXML_Node *serviceList = NULL;
    IXML_Node *current_service = NULL;
    IXML_Node *UDN = NULL;

    IXML_Node *serviceType = NULL;
    IXML_Node *serviceId = NULL;
    IXML_Node *SCPDURL = NULL;
    IXML_Node *controlURL = NULL;
    IXML_Node *eventURL = NULL;
    DOMString tempDOMString = NULL;