source: mainline/uspace/srv/net/modules.c@ bc9da2a

/*
 * Copyright (c) 2009 Lukas Mejdrech
 * 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
 */

/** @addtogroup net
 *  @{
 */

/** @file
 *  Generic module functions implementation.
 */

#include <async.h>
#include <malloc.h>

#include <ipc/ipc.h>
#include <ipc/services.h>

#include <sys/time.h>

#include "err.h"
#include "modules.h"

/** The time between connect requests in microseconds.
 */
#define MODULE_WAIT_TIME        ( 10 * 1000 )

int connect_to_service( services_t need ){
        return connect_to_service_timeout( need, 0 );
}

int connect_to_service_timeout( services_t need, suseconds_t timeout ){
        if (timeout <= 0)
                return async_connect_me_to_blocking( PHONE_NS, need, 0, 0);
        
        while( true ){
                int phone;

                phone = async_connect_me_to( PHONE_NS, need, 0, 0);
                if( (phone >= 0) || (phone != ENOENT) )
                        return phone;
        
                timeout -= MODULE_WAIT_TIME;
                if( timeout <= 0 ) return ETIMEOUT;

                usleep( MODULE_WAIT_TIME );
        }
}

int bind_service( services_t need, ipcarg_t arg1, ipcarg_t arg2, ipcarg_t arg3, async_client_conn_t client_receiver ){
        return bind_service_timeout( need, arg1, arg2, arg3, client_receiver, 0 );
}

int bind_service_timeout( services_t need, ipcarg_t arg1, ipcarg_t arg2, ipcarg_t arg3, async_client_conn_t client_receiver, suseconds_t timeout ){
        ERROR_DECLARE;

        int                     phone;
        ipcarg_t        phonehash;

        phone = connect_to_service_timeout( need, timeout );
        if( phone >= 0 ){
                if( ERROR_OCCURRED( ipc_connect_to_me( phone, arg1, arg2, arg3, & phonehash ))){
                        ipc_hangup( phone );
                        return ERROR_CODE;
                }
                async_new_connection( phonehash, 0, NULL, client_receiver );
        }
        return phone;
}

void answer_call( ipc_callid_t callid, int result, ipc_call_t * answer, int answer_count ){
        if( answer || ( ! answer_count )){
                switch( answer_count ){
                        case 0:
                                ipc_answer_0( callid, ( ipcarg_t ) result );
                                break;
                        case 1:
                                ipc_answer_1( callid, ( ipcarg_t ) result, IPC_GET_ARG1( * answer ));
                                break;
                        case 2:
                                ipc_answer_2( callid, ( ipcarg_t ) result, IPC_GET_ARG1( * answer ), IPC_GET_ARG2( * answer ));
                                break;
                        case 3:
                                ipc_answer_3( callid, ( ipcarg_t ) result, IPC_GET_ARG1( * answer ), IPC_GET_ARG2( * answer ), IPC_GET_ARG3( * answer ));
                                break;
                        case 4:
                                ipc_answer_4( callid, ( ipcarg_t ) result, IPC_GET_ARG1( * answer ), IPC_GET_ARG2( * answer ), IPC_GET_ARG3( * answer ), IPC_GET_ARG4( * answer ));
                                break;
                        case 5:
                        default:
                                ipc_answer_5( callid, ( ipcarg_t ) result, IPC_GET_ARG1( * answer ), IPC_GET_ARG2( * answer ), IPC_GET_ARG3( * answer ), IPC_GET_ARG4( * answer ), IPC_GET_ARG5( * answer ));
                                break;
                }
        }
}

void refresh_answer( ipc_call_t * answer, int * answer_count ){
        if( answer_count ){
                * answer_count = 0;
        }
        if( answer ){
                IPC_SET_RETVAL( * answer, 0 );
                // just to be precize
                IPC_SET_METHOD( * answer, 0 );
                IPC_SET_ARG1( * answer, 0 );
                IPC_SET_ARG2( * answer, 0 );
                IPC_SET_ARG3( * answer, 0 );
                IPC_SET_ARG4( * answer, 0 );
                IPC_SET_ARG5( * answer, 0 );
        }
}

int data_receive( void ** data, size_t * length ){
        ERROR_DECLARE;

        ipc_callid_t    callid;

        if( !( data && length )) return EBADMEM;
        if( ! async_data_write_receive( & callid, length )) return EINVAL;
        * data = malloc( * length );
        if( !( * data )) return ENOMEM;
        if( ERROR_OCCURRED( async_data_write_finalize( callid, * data, * length ))){
                free( data );
                return ERROR_CODE;
        }
        return EOK;
}

int data_reply( void * data, size_t data_length ){
        size_t                  length;
        ipc_callid_t    callid;

        if( ! async_data_read_receive( & callid, & length )){
                return EINVAL;
        }
        if( length < data_length ){
                async_data_read_finalize( callid, data, length );
                return EOVERFLOW;
        }
        return async_data_read_finalize( callid, data, data_length );
}

/** @}
 */