Subversion Repositories HelenOS

/** Obtains the packet from the packet server as the shared memory block.

 *  Creates the local packet mapping as well.

 *  @param phone The packet server module phone. Input parameter.

 *  @param packet The packet reference pointer to store the received packet reference. Output parameter.

 *  @param packet_id The packet identifier. Input parameter.

 *  @param size The packet total size in bytes. Input parameter.

 *  @returns EOK on success.

 *  \todo ipc_share_in_start() error?

 *  @returns Other error codes as defined for the pm_add() function.

 */

int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size );

int packet_translate( int phone, packet_ref packet, packet_id_t packet_id ){

    ERROR_DECLARE;

    unsigned int        size;

    if( ! packet ) return EINVAL;

    * packet = pm_find( packet_id );

    if( * packet ) return EOK;

    ERROR_PROPAGATE( async_req_1_1( phone, NET_PACKET_GET_SIZE, packet_id, & size ));

    return packet_return( phone, packet, packet_id, size );

}

int packet_return( int phone, packet_ref packet, packet_id_t packet_id, size_t size ){

    ERROR_DECLARE;

    aid_t       message;

    ipc_call_t  answer;

    ipcarg_t    result;

    message = async_send_1( phone, NET_PACKET_GET, packet_id, & answer );

    * packet = ( packet_t ) as_get_mappable_page( size );

    if( ERROR_OCCURRED( ipc_share_in_start_0_0( phone, * packet, size ))

    || ERROR_OCCURRED( pm_add( * packet ))){

        munmap( * packet, size );

        async_wait_for( message, NULL );

        return ERROR_CODE;

    }

    async_wait_for( message, & result );

    return result;

}

packet_t packet_get_4( int phone, size_t max_content, size_t addr_len, size_t max_prefix, size_t max_suffix ){

    ERROR_DECLARE;

    packet_id_t packet_id;

    unsigned int size;

    packet_t packet;

    if( ERROR_OCCURRED( async_req_4_2( phone, NET_PACKET_CREATE_4, max_content, addr_len, max_prefix, max_suffix, ( ipcarg_t * ) & packet_id, & size ))

    || ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){

        return NULL;

    }

    return packet;

}

packet_t packet_get_1( int phone, size_t content ){

    ERROR_DECLARE;

    packet_id_t packet_id;

    unsigned int    size;

    packet_t    packet;

    if( ERROR_OCCURRED( async_req_1_2( phone, NET_PACKET_CREATE_1, content, ( ipcarg_t * ) & packet_id, & size ))

    || ERROR_OCCURRED( packet_return( phone, & packet, packet_id, size ))){

        return NULL;

    }

    return packet;

}

void pq_release( int phone, packet_id_t packet_id ){

    async_msg_1( phone, NET_PACKET_RELEASE, packet_id );

}