bacnet_stack/bacnet-stack/demo/server/main.c

/**************************************************************************
*
* Copyright (C) 2006 Steve Karg <skarg@users.sourceforge.net>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*********************************************************************/
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <time.h>
#include "config.h"
#include "address.h"
#include "bacdef.h"
#include "handlers.h"
#include "client.h"
#include "bacdcode.h"
#include "npdu.h"
#include "apdu.h"
#include "iam.h"
#include "tsm.h"
#include "device.h"
#include "bacfile.h"
#include "datalink.h"
#include "dcc.h"
#include "net.h"
#include "txbuf.h"
#include "lc.h"
#include "version.h"
#if defined(BACDL_MSTP)
#include "rs485.h"
#endif

/* This is an example server application using the BACnet Stack */

/* buffers used for receiving */
static uint8_t Rx_Buf[MAX_MPDU] = { 0 };

static void Init_Service_Handlers(
    void)
{
    /* we need to handle who-is to support dynamic device binding */
    apdu_set_unconfirmed_handler(SERVICE_UNCONFIRMED_WHO_IS, handler_who_is);
    apdu_set_unconfirmed_handler(SERVICE_UNCONFIRMED_WHO_HAS, handler_who_has);
    /* set the handler for all the services we don't implement */
    /* It is required to send the proper reject message... */
    apdu_set_unrecognized_service_handler_handler
        (handler_unrecognized_service);
    /* Set the handlers for any confirmed services that we support. */
    /* We must implement read property - it's required! */
    apdu_set_confirmed_handler(SERVICE_CONFIRMED_READ_PROPERTY,
        handler_read_property);
    apdu_set_confirmed_handler(SERVICE_CONFIRMED_READ_PROP_MULTIPLE,
        handler_read_property_multiple);
    apdu_set_confirmed_handler(SERVICE_CONFIRMED_WRITE_PROPERTY,
        handler_write_property);
#if defined(BACFILE)
    apdu_set_confirmed_handler(SERVICE_CONFIRMED_ATOMIC_READ_FILE,
        handler_atomic_read_file);
    apdu_set_confirmed_handler(SERVICE_CONFIRMED_ATOMIC_WRITE_FILE,
        handler_atomic_write_file);
#endif
    apdu_set_confirmed_handler(SERVICE_CONFIRMED_REINITIALIZE_DEVICE,
        handler_reinitialize_device);
    apdu_set_unconfirmed_handler(SERVICE_UNCONFIRMED_UTC_TIME_SYNCHRONIZATION,
        handler_timesync_utc);
    apdu_set_unconfirmed_handler(SERVICE_UNCONFIRMED_TIME_SYNCHRONIZATION,
        handler_timesync);
    apdu_set_confirmed_handler(SERVICE_CONFIRMED_SUBSCRIBE_COV,
        handler_cov_subscribe);
    /* handle communication so we can shutup when asked */
    apdu_set_confirmed_handler(SERVICE_CONFIRMED_DEVICE_COMMUNICATION_CONTROL,
        handler_device_communication_control);
}

static void cleanup(
    void)
{
    datalink_cleanup();
}

static void Init_DataLink(
    void)
{
    char *pEnv = NULL;
#if defined(BACDL_BIP) && BBMD_ENABLED
    long bbmd_port = 0xBAC0;
    long bbmd_address = 0;
    long bbmd_timetolive_seconds = 60000;
#endif

#if defined(BACDL_ALL)
    pEnv = getenv("BACNET_DATALINK");
    if (pEnv) {
        datalink_set(pEnv));
    } else {
        datalink_set(NULL);
    }
#endif

#if defined(BACDL_BIP)
    pEnv = getenv("BACNET_IP_PORT");
    if (pEnv) {
        bip_set_port(strtol(pEnv, NULL, 0));
    } else {
        bip_set_port(0xBAC0);
    }
    BIP_Debug = true;
#elif defined(BACDL_MSTP)
    pEnv = getenv("BACNET_MAX_INFO_FRAMES");
    if (pEnv) {
        dlmstp_set_max_info_frames(strtol(pEnv, NULL, 0));
    } else {
        dlmstp_set_max_info_frames(1);
    }
    pEnv = getenv("BACNET_MAX_MASTER");
    if (pEnv) {
        dlmstp_set_max_master(strtol(pEnv, NULL, 0));
    } else {
        dlmstp_set_max_master(127);
    }
    pEnv = getenv("BACNET_MSTP_BAUD");
    if (pEnv) {
        RS485_Set_Baud_Rate(strtol(pEnv, NULL, 0));
    } else {
        RS485_Set_Baud_Rate(38400);
    }
    pEnv = getenv("BACNET_MSTP_MAC");
    if (pEnv) {
        dlmstp_set_mac_address(strtol(pEnv, NULL, 0));
    } else {
        dlmstp_set_mac_address(127);
    }
#endif
    if (!datalink_init(getenv("BACNET_IFACE"))) {
        exit(1);
    }
#if defined(BACDL_BIP) && BBMD_ENABLED
    pEnv = getenv("BACNET_BBMD_PORT");
    if (pEnv) {
        bbmd_port = strtol(pEnv, NULL, 0);
        if (bbmd_port > 0xFFFF) {
            bbmd_port = 0xBAC0;
        }
    }
    pEnv = getenv("BACNET_BBMD_TIMETOLIVE");
    if (pEnv) {
        bbmd_timetolive_seconds = strtol(pEnv, NULL, 0);
        if (bbmd_timetolive_seconds > 0xFFFF) {
            bbmd_timetolive_seconds = 0xFFFF;
        }
    }
    pEnv = getenv("BACNET_BBMD_ADDRESS");
    if (pEnv) {
        bbmd_address = bip_getaddrbyname(pEnv);
        if (bbmd_address) {
            struct in_addr addr;
            addr.s_addr = bbmd_address;
            printf("Server: Registering with BBMD at %s:%ld for %ld seconds\n",
                inet_ntoa(addr), bbmd_port, bbmd_timetolive_seconds);
            bvlc_register_with_bbmd(bbmd_address, bbmd_port,
                bbmd_timetolive_seconds);
        }
    }
#endif
}

int main(int argc, char *argv[]) {
    BACNET_ADDRESS src = {
    0}; /* address where message came from */
    uint16_t pdu_len = 0;
    unsigned timeout = 1000;    /* milliseconds */
    time_t last_seconds = 0;
    time_t current_seconds = 0;
    uint32_t elapsed_seconds = 0;
    uint32_t elapsed_milliseconds = 0;

    /* allow the device ID to be set */
    if (argc > 1)
        Device_Set_Object_Instance_Number(strtol(argv[1], NULL, 0));
    printf("BACnet Server Demo\n" "BACnet Stack Version %s\n"
        "BACnet Device ID: %u\n" "Max APDU: %d\n", BACnet_Version,
        Device_Object_Instance_Number(), MAX_APDU);
    Init_Service_Handlers();
    Init_DataLink();
    atexit(cleanup);
    /* configure the timeout values */
    last_seconds = time(NULL);
    /* broadcast an I-Am on startup */
    Send_I_Am(&Handler_Transmit_Buffer[0]);
    /* loop forever */
    for (;;) {
        /* input */
        current_seconds = time(NULL);

        /* returns 0 bytes on timeout */
        pdu_len = datalink_receive(&src, &Rx_Buf[0], MAX_MPDU, timeout);

        /* process */
        if (pdu_len) {
            npdu_handler(&src, &Rx_Buf[0], pdu_len);
        }
        /* at least one second has passed */
        elapsed_seconds = current_seconds - last_seconds;
        if (elapsed_seconds) {
            last_seconds = current_seconds;
            dcc_timer_seconds(elapsed_seconds);
#if defined(BACDL_BIP) && BBMD_ENABLED
            bvlc_maintenance_timer(elapsed_seconds);
#endif
            Load_Control_State_Machine_Handler();
            elapsed_milliseconds = elapsed_seconds * 1000;
            handler_cov_task(elapsed_seconds);
            tsm_timer_milliseconds(elapsed_milliseconds);
        }
        /* output */

        /* blink LEDs, Turn on or off outputs, etc */
    }
}