skarg
225 lines
7.4 KiB
C
225 lines
7.4 KiB
C
/**************************************************************************
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*
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* Copyright (C) 2009 Steve Karg <skarg@users.sourceforge.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*********************************************************************/
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/* environment variables used for the command line tools */
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "config.h"
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#include "bacdef.h"
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#include "apdu.h"
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#include "datalink.h"
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#include "handlers.h"
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#include "dlenv.h"
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#include "tsm.h"
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/** @file dlenv.c Initialize the DataLink configuration. */
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/* timer used to renew Foreign Device Registration */
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static uint16_t BBMD_Timer_Seconds;
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/** Register as a Foreign Device
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* @ingroup DataLink
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* The Environment Variables depend on defines BACDL_BIP and BBMD_ENABLED:
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* - BACNET_BBMD_PORT - 0..65534, defaults to 47808
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* - BACNET_BBMD_TIMETOLIVE - 0..65535 seconds, defaults to 60000
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* - BACNET_BBMD_ADDRESS - dotted IPv4 address
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*/
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void dlenv_register_as_foreign_device(
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void)
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{
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#if defined(BACDL_BIP) && BBMD_ENABLED
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char *pEnv = NULL;
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long bbmd_timetolive_seconds = 60000;
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long bbmd_port = 0xBAC0;
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long bbmd_address = 0;
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pEnv = getenv("BACNET_BBMD_PORT");
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if (pEnv) {
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bbmd_port = strtol(pEnv, NULL, 0);
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if (bbmd_port > 0xFFFF) {
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bbmd_port = 0xBAC0;
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}
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}
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pEnv = getenv("BACNET_BBMD_TIMETOLIVE");
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if (pEnv) {
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bbmd_timetolive_seconds = strtol(pEnv, NULL, 0);
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if (bbmd_timetolive_seconds > 0xFFFF) {
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bbmd_timetolive_seconds = 0xFFFF;
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}
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}
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pEnv = getenv("BACNET_BBMD_ADDRESS");
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if (pEnv) {
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bbmd_address = bip_getaddrbyname(pEnv);
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if (bbmd_address) {
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struct in_addr addr;
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addr.s_addr = bbmd_address;
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fprintf(stderr,
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"Registering with BBMD at %s:%ld for %ld seconds\n",
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inet_ntoa(addr), bbmd_port, bbmd_timetolive_seconds);
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bvlc_register_with_bbmd(bbmd_address, (uint16_t) bbmd_port,
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(uint16_t) bbmd_timetolive_seconds);
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BBMD_Timer_Seconds = bbmd_timetolive_seconds;
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}
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}
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#endif
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}
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/** Datalink maintenance timer
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* @ingroup DataLink
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*
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* Call this function to renew Foreign Device Registration
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*/
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void dlenv_maintenance_timer(
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uint16_t elapsed_seconds)
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{
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if (BBMD_Timer_Seconds) {
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if (BBMD_Timer_Seconds <= elapsed_seconds) {
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BBMD_Timer_Seconds = 0;
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} else {
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BBMD_Timer_Seconds -= elapsed_seconds;
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}
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if (BBMD_Timer_Seconds == 0) {
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dlenv_register_as_foreign_device();
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}
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}
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}
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/** Initialize the DataLink configuration from Environment variables,
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* or else to defaults.
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* @ingroup DataLink
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* The items configured depend on which BACDL_ the code is built for,
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* eg, BACDL_BIP.
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*
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* For most items, checks first for an environment variable, and, if
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* found, uses that to set the item's value. Otherwise, will set
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* to a default value.
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*
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* The Environment Variables, by BACDL_ type, are:
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* - BACDL_ALL: (the general-purpose solution)
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* - BACNET_DATALINK to set which BACDL_ type we are using.
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* - (Any):
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* - BACNET_APDU_TIMEOUT - set this value in milliseconds to change
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* the APDU timeout. APDU Timeout is how much time a client
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* waits for a response from a BACnet device.
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* - BACNET_IFACE - set this value to dotted IP address (Windows) of
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* the interface (see ipconfig command on Windows) for which you
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* want to bind. On Linux, set this to the /dev interface
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* (i.e. eth0, arc0). Default is eth0 on Linux, and the default
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* interface on Windows. Hence, if there is only a single network
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* interface on Windows, the applications will choose it, and this
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* setting will not be needed.
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* - BACDL_BIP: (BACnet/IP)
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* - BACNET_IP_PORT - UDP/IP port number (0..65534) used for BACnet/IP
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* communications. Default is 47808 (0xBAC0).
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* - with BBMD_ENABLED also:
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* - BACNET_BBMD_PORT - UDP/IP port number (0..65534) used for Foreign
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* Device Registration. Defaults to 47808 (0xBAC0).
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* - BACNET_BBMD_TIMETOLIVE - number of seconds used in Foreign Device
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* Registration (0..65535). Defaults to 60000 seconds.
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* - BACNET_BBMD_ADDRESS - dotted IPv4 address of the BBMD or Foreign
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* Device Registrar.
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* - BACDL_MSTP: (BACnet MS/TP)
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* - BACNET_MAX_INFO_FRAMES
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* - BACNET_MAX_MASTER
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* - BACNET_MSTP_BAUD
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* - BACNET_MSTP_MAC
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*/
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void dlenv_init(
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void)
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{
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char *pEnv = NULL;
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#if defined(BACDL_ALL)
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pEnv = getenv("BACNET_DATALINK");
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if (pEnv) {
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datalink_set(pEnv));
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} else {
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datalink_set(NULL);
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}
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#endif
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#if defined(BACDL_BIP)
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#if defined(BIP_DEBUG)
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BIP_Debug = true;
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#endif
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pEnv = getenv("BACNET_IP_PORT");
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if (pEnv) {
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bip_set_port((uint16_t) strtol(pEnv, NULL, 0));
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} else {
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/* BIP_Port is statically initialized to 0xBAC0,
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* so if it is different, then it was programmatically altered,
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* and we shouldn't just stomp on it here.
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* Unless it is set below 1024, since:
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* "The range for well-known ports managed by the IANA is 0-1023."
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*/
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if (bip_get_port() < 1024)
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bip_set_port(0xBAC0);
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}
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#elif defined(BACDL_MSTP)
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pEnv = getenv("BACNET_MAX_INFO_FRAMES");
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if (pEnv) {
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dlmstp_set_max_info_frames(strtol(pEnv, NULL, 0));
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} else {
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dlmstp_set_max_info_frames(1);
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}
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pEnv = getenv("BACNET_MAX_MASTER");
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if (pEnv) {
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dlmstp_set_max_master(strtol(pEnv, NULL, 0));
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} else {
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dlmstp_set_max_master(127);
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}
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pEnv = getenv("BACNET_MSTP_BAUD");
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if (pEnv) {
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dlmstp_set_baud_rate(strtol(pEnv, NULL, 0));
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} else {
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dlmstp_set_baud_rate(38400);
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}
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pEnv = getenv("BACNET_MSTP_MAC");
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if (pEnv) {
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dlmstp_set_mac_address(strtol(pEnv, NULL, 0));
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} else {
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dlmstp_set_mac_address(127);
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}
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#endif
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pEnv = getenv("BACNET_APDU_TIMEOUT");
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if (pEnv) {
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apdu_timeout_set((uint16_t) strtol(pEnv, NULL, 0));
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fprintf(stderr, "BACNET_APDU_TIMEOUT=%s\r\n", pEnv);
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} else {
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#if defined(BACDL_MSTP)
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apdu_timeout_set(60000);
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#endif
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}
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if (!datalink_init(getenv("BACNET_IFACE"))) {
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exit(1);
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}
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pEnv = getenv("BACNET_INVOKE_ID");
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if (pEnv) {
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tsm_invokeID_set((uint8_t) strtol(pEnv, NULL, 0));
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}
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dlenv_register_as_foreign_device();
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}
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