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 *  @returns The packet of dimensions at least as given.
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 *  @returns The packet of dimensions at least as given.
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 *  @returns NULL if there is not enough memory left.
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 *  @returns NULL if there is not enough memory left.
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 */
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 */
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packet_t    packet_create( size_t length, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix );
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packet_t    packet_create( size_t length, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix );
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/** Initializes the packet according to the given dimensions.
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/** Clears and initializes the packet according to the given dimensions.
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 *  @param packet The packet to be initialized. Input parameter.
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 *  @param packet The packet to be initialized. Input parameter.
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 *  @param addr_len The source and destination addresses maximal length in bytes. Input parameter.
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 *  @param addr_len The source and destination addresses maximal length in bytes. Input parameter.
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 *  @param max_prefix The maximal prefix length in bytes. Input parameter.
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 *  @param max_prefix The maximal prefix length in bytes. Input parameter.
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 *  @param max_content The maximal content length in bytes. Input parameter.
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 *  @param max_content The maximal content length in bytes. Input parameter.
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 *  @param max_suffix The maximal suffix length in bytes. Input parameter.
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 *  @param max_suffix The maximal suffix length in bytes. Input parameter.
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    if( packet == MAP_FAILED ) return NULL;
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    if( packet == MAP_FAILED ) return NULL;
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    ++ ps_globals.count;
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    ++ ps_globals.count;
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    packet->packet_id = ps_globals.count;
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    packet->packet_id = ps_globals.count;
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    packet->length = length;
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    packet->length = length;
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    packet_init( packet, addr_len, max_prefix, max_content, max_suffix );
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    packet_init( packet, addr_len, max_prefix, max_content, max_suffix );
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    packet->magic_value = PACKET_MAGIC_VALUE;
 - 
 
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    if( ERROR_OCCURRED( pm_add( packet ))){
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    if( ERROR_OCCURRED( pm_add( packet ))){
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        munmap( packet, packet->length );
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        munmap( packet, packet->length );
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        return NULL;
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        return NULL;
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    }
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    }
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    packet_release( packet );
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    packet_release( packet );
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    return packet;
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    return packet;
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}
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}
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void packet_init( packet_t packet, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){
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void packet_init( packet_t packet, size_t addr_len, size_t max_prefix, size_t max_content, size_t max_suffix ){
- 
 
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    int length;
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- 
 
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    // clear whole packet
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    length = packet->length;
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    bzero( packet, packet->length );
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    packet->length = length;
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    packet->magic_value = PACKET_MAGIC_VALUE;
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/*  // clear the packet header
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    packet->order = 0;
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    packet->order = 0;
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    packet->metric = 0;
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    packet->metric = 0;
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    packet->previous = 0;
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    packet->previous = 0;
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    packet->next = 0;
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    packet->next = 0;
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    packet->addr_len = addr_len;
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    packet->addr_len = 0;
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    packet->src_addr = sizeof( struct packet );
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*/  packet->src_addr = sizeof( struct packet );
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    packet->dest_addr = packet->src_addr + packet->addr_len;
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    packet->dest_addr = packet->src_addr + addr_len;
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    packet->max_prefix = max_prefix;
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    packet->max_prefix = max_prefix;
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    packet->max_content = max_content;
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    packet->max_content = max_content;
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    packet->data_start = packet->dest_addr + packet->addr_len + packet->max_prefix;
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    packet->data_start = packet->dest_addr + addr_len + packet->max_prefix;
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    packet->data_end = packet->data_start;
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    packet->data_end = packet->data_start;
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}
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}
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int packet_reply( const packet_t packet ){
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int packet_reply( const packet_t packet ){
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    ipc_callid_t    callid;
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    ipc_callid_t    callid;