smsc.c

The Kannel Open Source WAP and SMS gateway works as both an SMS gateway, for implementing keyword b

/* ==================================================================== 
 * The Kannel Software License, Version 1.0 
 * 
 * Copyright (c) 2001-2004 Kannel Group  
 * Copyright (c) 1998-2001 WapIT Ltd.   
 * All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 
 * 1. Redistributions of source code must retain the above copyright 
 *    notice, this list of conditions and the following disclaimer. 
 * 
 * 2. 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. 
 * 
 * 3. The end-user documentation included with the redistribution, 
 *    if any, must include the following acknowledgment: 
 *       "This product includes software developed by the 
 *        Kannel Group (http://www.kannel.org/)." 
 *    Alternately, this acknowledgment may appear in the software itself, 
 *    if and wherever such third-party acknowledgments normally appear. 
 * 
 * 4. The names "Kannel" and "Kannel Group" must not be used to 
 *    endorse or promote products derived from this software without 
 *    prior written permission. For written permission, please  
 *    contact [e-mail]. 
 * 
 * 5. Products derived from this software may not be called "Kannel", 
 *    nor may "Kannel" appear in their name, without prior written 
 *    permission of the Kannel Group. 
 * 
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 KANNEL GROUP OR ITS CONTRIBUTORS 
 * 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. 
 * ==================================================================== 
 * 
 * This software consists of voluntary contributions made by many 
 * individuals on behalf of the Kannel Group.  For more information on  
 * the Kannel Group, please see <http://www.kannel.org/>. 
 * 
 * Portions of this software are based upon software originally written at  
 * WapIT Ltd., Helsinki, Finland for the Kannel project.  
 */ 

/*
 * smsc.c - implement interface to SMS centers as defined by smsc.h
 *
 * Lars Wirzenius and Kalle Marjola for WapIT Ltd.
 */

/* NOTE: private functions (only for smsc_* use) are named smscenter_*,
 * public functions (used by gateway) are named smsc_*
 */

#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/time.h>

#include "gwlib/gwlib.h"
#include "smsc.h"
#include "smsc_p.h"
#include "msg.h"

/*
 * Maximum number of characters for read_into_buffer to read at a time.
 */
#define MAX_READ_INTO_BUFFER	(1024)


static void smscenter_lock(SMSCenter *smsc);
static void smscenter_unlock(SMSCenter *smsc);

/*--------------------------------------------------------------------
 * TODO: WAP WDP functions!
 */


/*--------------------------------------------------------------------
 * smscenter functions
 */



SMSCenter *smscenter_construct(void)
{
    SMSCenter *smsc;
    static int next_id = 1;

    smsc = gw_malloc(sizeof(SMSCenter));

    smsc->killed = 0;
    smsc->type = SMSC_TYPE_DELETED;
    smsc->preferred_prefix = NULL;
    smsc->allowed_prefix = NULL;
    smsc->denied_prefix = NULL;
    smsc->alt_charset = 0;
    smsc->keepalive = 0;

    smsc->mutex = mutex_create();

    sprintf(smsc->name, "Unknown SMSC");
    smsc->id = next_id++;

    /* FAKE */
    smsc->hostname = NULL;
    smsc->port = -1;
    smsc->socket = -1;

    /* CIMD */
    smsc->cimd_hostname = NULL;
    smsc->cimd_port = -1;
    smsc->cimd_username = NULL;
    smsc->cimd_password = NULL;

    /* EMI_X25 */
    smsc->emi_phonenum = NULL;
    smsc->emi_serialdevice = NULL;
    smsc->emi_username = NULL;
    smsc->emi_password = NULL;

    /* SEMA SMS2000 */
    smsc->sema_smscnua = NULL;
    smsc->sema_homenua = NULL;
    smsc->sema_serialdevice = NULL;
    smsc->sema_fd = -1;

    /* SEMA SMS2000 OIS X.25 */
    smsc->ois_alive = 0;
    smsc->ois_alive2 = 0;
    smsc->ois_received_mo = NULL;
    smsc->ois_ack_debt = 0;
    smsc->ois_flags = 0;
    smsc->ois_listening_socket = -1;
    smsc->ois_socket = -1;
    smsc->ois_buflen = 0;
    smsc->ois_bufsize = 0;
    smsc->ois_buffer = 0;

    /* add new SMSCes here */

    /* Memory */
    smsc->buflen = 0;
    smsc->bufsize = 10*1024;
    smsc->buffer = gw_malloc(smsc->bufsize);
    memset(smsc->buffer, 0, smsc->bufsize);

    return smsc;
}


void smscenter_destruct(SMSCenter *smsc)
{
    if (smsc == NULL)
        return;

    /* FAKE */
    gw_free(smsc->hostname);

    /* CIMD */
    gw_free(smsc->cimd_hostname);
    gw_free(smsc->cimd_username);
    gw_free(smsc->cimd_password);

    /* EMI_X25 */
    gw_free(smsc->emi_phonenum);
    gw_free(smsc->emi_serialdevice);
    gw_free(smsc->emi_username);
    gw_free(smsc->emi_password);

    /* SEMA */
    gw_free(smsc->sema_smscnua);
    gw_free(smsc->sema_homenua);
    gw_free(smsc->sema_serialdevice);

    /* OIS */
    ois_delete_queue(smsc);
    gw_free(smsc->ois_buffer);

    /* add new SMSCes here */

    /* Other fields */
    mutex_destroy(smsc->mutex);

    /* Memory */
    gw_free(smsc->buffer);
    gw_free(smsc);
}




int smscenter_submit_msg(SMSCenter *smsc, Msg *msg)
{
    smscenter_lock(smsc);

    switch (smsc->type) {

    case SMSC_TYPE_CIMD:
        if (cimd_submit_msg(smsc, msg) == -1)
            goto error;
        break;

    case SMSC_TYPE_EMI_X25:
        if (emi_submit_msg(smsc, msg) == -1)
            goto error;
        break;

    case SMSC_TYPE_SEMA_X28:
        if (sema_submit_msg(smsc, msg) == -1)
            goto error;
        break;

    case SMSC_TYPE_OIS:
        if (ois_submit_msg(smsc, msg) == -1)
            goto error;
        break;

        /* add new SMSCes here */

    default:
        goto error;
    }

    smscenter_unlock(smsc);
    return 0;

error:
    smscenter_unlock(smsc);
    return -1;
}



int smscenter_receive_msg(SMSCenter *smsc, Msg **msg)
{
    int ret;

    smscenter_lock(smsc);

    switch (smsc->type) {

    case SMSC_TYPE_CIMD:
        ret = cimd_receive_msg(smsc, msg);
        if (ret == -1)
            goto error;
        break;

    case SMSC_TYPE_EMI_X25:
        ret = emi_receive_msg(smsc, msg);
        if (ret == -1)
            goto error;
        break;

    case SMSC_TYPE_OIS:
        ret = ois_receive_msg(smsc, msg);
        if (ret == -1)
            goto error;
        break;


    case SMSC_TYPE_SEMA_X28:
        ret = sema_receive_msg(smsc, msg);
        if (ret == -1)
            goto error;
        break;

    default:
        goto error;

    }
    smscenter_unlock(smsc);

    /* If the SMSC didn't set the timestamp, set it here. */
    if (ret == 1 && msg_type(*msg) == sms && (*msg)->sms.time == 0)
        time(&(*msg)->sms.time);

    return ret;

error:
    smscenter_unlock(smsc);
    return -1;
}


int smscenter_pending_smsmessage(SMSCenter *smsc)
{
    int ret;

    smscenter_lock(smsc);

    switch (smsc->type) {

    case SMSC_TYPE_CIMD:
        ret = cimd_pending_smsmessage(smsc);
        if (ret == -1)
            goto error;
        break;

    case SMSC_TYPE_EMI_X25:
        ret = emi_pending_smsmessage(smsc);
        if (ret == -1)
            goto error;
        break;

    case SMSC_TYPE_SEMA_X28:
        ret = sema_pending_smsmessage(smsc);
        if (ret == -1)
            goto error;
        break;

    case SMSC_TYPE_OIS:
        ret = ois_pending_smsmessage(smsc);
        if (ret == -1)
            goto error;
        break;

    default:
        goto error;
    }

    smscenter_unlock(smsc);
    return ret;

error:
    error(0, "smscenter_pending_smsmessage is failing");
    smscenter_unlock(smsc);
    return -1;
}