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bacnet_stack/bacnet-stack/ports/linux/dlmstp.c
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/**************************************************************************
*
* Copyright (C) 2007 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 <stdbool.h>
#include <stdint.h>
#include <stddef.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
/* Linux Includes */
#include <sched.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>
#include <pthread.h>
#include <mqueue.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <errno.h>
/* project includes */
#include "bacdef.h"
#include "bacaddr.h"
#include "mstp.h"
#include "dlmstp.h"
#include "rs485.h"
#include "npdu.h"
#include "bits.h"
/* Number of MS/TP Packets Rx/Tx */
uint16_t MSTP_Packets = 0;
/* Posix queues are used for NPDU queues */
static mqd_t NPDU_Receive_Queue = -1;
static mqd_t NPDU_Transmit_Queue = -1;
/* local MS/TP port data - shared with RS-485 */
volatile struct mstp_port_struct_t MSTP_Port;
/* buffers needed by mstp port struct */
static uint8_t TxBuffer[MAX_MPDU];
static uint8_t RxBuffer[MAX_MPDU];
/* Timer that indicates line silence - and functions */
static uint16_t SilenceTime;
#define INCREMENT_AND_LIMIT_UINT16(x) {if (x < 0xFFFF) x++;}
static uint16_t Timer_Silence(
void)
{
return SilenceTime;
}
static void Timer_Silence_Reset(
void)
{
SilenceTime = 0;
}
static void dlmstp_millisecond_timer(
void)
{
INCREMENT_AND_LIMIT_UINT16(SilenceTime);
}
static void *dlmstp_milliseconds_task(
void *pArg)
{
struct timespec timeOut, remains;
timeOut.tv_sec = 0;
timeOut.tv_nsec = 1000000; /* 1 millisecond */
for (;;) {
nanosleep(&timeOut, &remains);
dlmstp_millisecond_timer();
}
return NULL;
}
void dlmstp_reinit(
void)
{
/*RS485_Reinit(); */
dlmstp_set_mac_address(DEFAULT_MAC_ADDRESS);
dlmstp_set_max_info_frames(DEFAULT_MAX_INFO_FRAMES);
dlmstp_set_max_master(DEFAULT_MAX_MASTER);
}
/* returns number of bytes sent on success, zero on failure */
int dlmstp_send_pdu(
BACNET_ADDRESS * dest, /* destination address */
BACNET_NPDU_DATA * npdu_data, /* network information */
uint8_t * pdu, /* any data to be sent - may be null */
unsigned pdu_len)
{ /* number of bytes of data */
DLMSTP_PACKET packet;
int bytes_sent = 0;
mqd_t rc = 0;
if (pdu_len) {
#if PRINT_ENABLED
fprintf(stderr, "MS/TP: sending packet\n");
#endif
if (npdu_data->data_expecting_reply) {
packet.frame_type = FRAME_TYPE_BACNET_DATA_EXPECTING_REPLY;
} else {
packet.frame_type = FRAME_TYPE_BACNET_DATA_NOT_EXPECTING_REPLY;
}
packet.pdu_len = pdu_len;
memmove(&packet.pdu[0], &pdu[0], pdu_len);
memmove(&packet.address, dest, sizeof(packet.address));
rc = mq_send(NPDU_Transmit_Queue, (const char *)&packet, sizeof(packet), 0);
if (rc > 0)
bytes_sent = rc;
}
return bytes_sent;
}
/* copy the packet if one is received.
Return the length of the packet */
uint16_t dlmstp_receive(
BACNET_ADDRESS * src, /* source address */
uint8_t * pdu, /* PDU data */
uint16_t max_pdu, /* amount of space available in the PDU */
unsigned timeout)
{ /* milliseconds to wait for a packet */
uint16_t pdu_len = 0;
mqd_t received_bytes = 0;
DLMSTP_PACKET packet;
struct timespec queue_timeout = {0};
time_t epoch_time = 0;
unsigned msg_prio = 0;
char buffer[sizeof(struct dlmstp_packet)+1];
if (NPDU_Receive_Queue == -1) {
return 0;
}
/* configure queue timeout */
if (timeout >= 1000) {
queue_timeout.tv_sec = timeout / 1000;
queue_timeout.tv_nsec =
1000000L * (timeout - queue_timeout.tv_sec * 1000);
} else {
queue_timeout.tv_sec = 0;
queue_timeout.tv_nsec = 1000000L * timeout;
}
/* get current time */
epoch_time = time(NULL);
queue_timeout.tv_sec += epoch_time;
received_bytes = mq_timedreceive(
NPDU_Receive_Queue,
buffer,
sizeof(buffer),
&msg_prio,
&queue_timeout);
/* See if there is a problem */
if (received_bytes == -1) {
/* EAGAIN Non-blocking I/O has been selected */
/* using O_NONBLOCK and no data */
/* was immediately available for reading. */
if ((errno != EAGAIN) && (errno != ETIMEDOUT)) {
#if PRINT_ENABLED
fprintf(stderr, "MS/TP: NPDU Receive: %s\n",
strerror(errno));
#endif
}
return 0;
}
if (received_bytes == 0)
return 0;
/* copy the buffer into the PDU */
memmove(&packet,buffer,sizeof(packet));
pdu_len = packet.pdu_len;
memmove(&pdu[0], &packet.pdu[0], pdu_len);
memmove(src, &packet.address, sizeof(packet.address));
/* not used in this scheme */
packet.ready = true;
return pdu_len;
}
static void *dlmstp_fsm_receive_task(
void *pArg)
{
bool received_frame = false;
for (;;) {
/* only do receive state machine while we don't have a frame */
if ((MSTP_Port.ReceivedValidFrame == false) &&
(MSTP_Port.ReceivedInvalidFrame == false)) {
do {
/* using blocking read with timeout on serial port */
RS485_Check_UART_Data(&MSTP_Port);
MSTP_Receive_Frame_FSM(&MSTP_Port);
received_frame = MSTP_Port.ReceivedValidFrame ||
MSTP_Port.ReceivedInvalidFrame;
if (received_frame)
break;
} while (MSTP_Port.DataAvailable);
}
}
return NULL;
}
static void *dlmstp_fsm_master_task(
void *pArg)
{
struct timespec timeOut, remains;
timeOut.tv_sec = 0;
timeOut.tv_nsec = 100000; /* .1 millisecond */
for (;;) {
nanosleep(&timeOut, &remains);
/* only do master state machine while rx is idle */
if (MSTP_Port.receive_state == MSTP_RECEIVE_STATE_IDLE) {
while (MSTP_Master_Node_FSM(&MSTP_Port)) {
sched_yield();
}
}
}
return NULL;
}
void dlmstp_fill_bacnet_address(
BACNET_ADDRESS * src,
uint8_t mstp_address)
{
int i = 0;
if (mstp_address == MSTP_BROADCAST_ADDRESS) {
/* mac_len = 0 if broadcast address */
src->mac_len = 0;
src->mac[0] = 0;
} else {
src->mac_len = 1;
src->mac[0] = mstp_address;
}
/* fill with 0's starting with index 1; index 0 filled above */
for (i = 1; i < MAX_MAC_LEN; i++) {
src->mac[i] = 0;
}
src->net = 0;
src->len = 0;
for (i = 0; i < MAX_MAC_LEN; i++) {
src->adr[i] = 0;
}
}
/* for the MS/TP state machine to use for putting received data */
uint16_t MSTP_Put_Receive(
volatile struct mstp_port_struct_t *mstp_port)
{
DLMSTP_PACKET packet;
uint16_t pdu_len = mstp_port->DataLength;
/* bounds check - maybe this should send an abort? */
if (pdu_len > sizeof(packet.pdu))
pdu_len = sizeof(packet.pdu);
if (pdu_len) {
#if PRINT_ENABLED
fprintf(stderr,"MSTP: packet from FSM.\n");
#endif
MSTP_Packets++;
memmove(&packet.pdu[0], (void *) &mstp_port->InputBuffer[0], pdu_len);
dlmstp_fill_bacnet_address(&packet.address, mstp_port->SourceAddress);
packet.pdu_len = pdu_len;
/* ready is not used in this scheme */
packet.ready = true;
mq_send(NPDU_Receive_Queue, (const char *)&packet, sizeof(packet), 0);
}
return pdu_len;
}
/* for the MS/TP state machine to use for getting data to send */
/* Return: amount of PDU data */
int dlmstp_get_transmit_packet(
DLMSTP_PACKET * packet,
unsigned timeout)
{ /* milliseconds to wait for a packet */
int received_bytes = 0; /* return value */
struct timespec queue_timeout = {0};
time_t epoch_time = 0;
unsigned msg_prio = 0;
char buffer[sizeof(struct dlmstp_packet)+1];
/* Make sure the socket is open */
if (NPDU_Transmit_Queue == -1)
return 0;
if (timeout >= 1000) {
queue_timeout.tv_sec = timeout / 1000;
queue_timeout.tv_nsec =
1000000L * (timeout - queue_timeout.tv_sec * 1000);
} else {
queue_timeout.tv_sec = 0;
queue_timeout.tv_nsec = 1000000L * timeout;
}
/* get current time */
epoch_time = time(NULL);
queue_timeout.tv_sec += epoch_time;
received_bytes = mq_timedreceive(
NPDU_Transmit_Queue,
buffer,
sizeof(buffer),
&msg_prio,
&queue_timeout);
/* See if there is a problem */
if (received_bytes == -1) {
/* EAGAIN Non-blocking I/O has been selected */
/* using O_NONBLOCK and no data */
/* was immediately available for reading. */
if ((errno != EAGAIN) && (errno != ETIMEDOUT)) {
#if PRINT_ENABLED
fprintf(stderr, "MS/TP: Read error in Transmit_Client packet: %s\n",
strerror(errno));
#endif
}
return 0;
}
memmove(packet,buffer,sizeof(packet));
return (received_bytes);
}
/* for the MS/TP state machine to use for getting data to send */
/* Return: amount of PDU data */
uint16_t MSTP_Get_Send(
volatile struct mstp_port_struct_t * mstp_port,
unsigned timeout)
{ /* milliseconds to wait for a packet */
uint16_t pdu_len = 0; /* return value */
int received_bytes = 0;
DLMSTP_PACKET packet;
uint8_t destination = 0; /* destination address */
received_bytes = dlmstp_get_transmit_packet(&packet, timeout);
if (received_bytes <= 0)
return 0;
/* load destination MAC address */
if (packet.address.mac_len == 1) {
destination = packet.address.mac[0];
} else {
return 0;
}
if ((MAX_HEADER + packet.pdu_len) > MAX_MPDU) {
return 0;
}
#if PRINT_ENABLED
fprintf(stderr,"MS/TP: sending packet to FSM.\n");
#endif
/* convert the PDU into the MSTP Frame */
pdu_len = MSTP_Create_Frame(&mstp_port->OutputBuffer[0], /* <-- loading this */
mstp_port->OutputBufferSize, packet.frame_type, destination,
mstp_port->This_Station, &packet.pdu[0], packet.pdu_len);
return pdu_len;
}
bool dlmstp_compare_data_expecting_reply(
uint8_t * request_pdu,
uint16_t request_pdu_len,
uint8_t src_address,
uint8_t * reply_pdu,
uint16_t reply_pdu_len,
BACNET_ADDRESS * dest_address)
{
uint16_t offset;
/* One way to check the message is to compare NPDU
src, dest, along with the APDU type, invoke id.
Seems a bit overkill */
struct DER_compare_t {
BACNET_NPDU_DATA npdu_data;
BACNET_ADDRESS address;
uint8_t pdu_type;
uint8_t invoke_id;
uint8_t service_choice;
};
struct DER_compare_t request;
struct DER_compare_t reply;
/* decode the request data */
request.address.mac[0] = src_address;
request.address.mac_len = 1;
offset =
npdu_decode(&request_pdu[0], NULL, &request.address,
&request.npdu_data);
if (request.npdu_data.network_layer_message) {
return false;
}
request.pdu_type = request_pdu[offset] & 0xF0;
if (request.pdu_type != PDU_TYPE_CONFIRMED_SERVICE_REQUEST) {
return false;
}
request.invoke_id = request_pdu[offset + 2];
/* segmented message? */
if (request_pdu[offset] & BIT3)
request.service_choice = request_pdu[offset + 5];
else
request.service_choice = request_pdu[offset + 3];
/* decode the reply data */
bacnet_address_copy(&reply.address, dest_address);
offset =
npdu_decode(&reply_pdu[0], &reply.address, NULL, &reply.npdu_data);
if (reply.npdu_data.network_layer_message) {
return false;
}
/* reply could be a lot of things:
confirmed, simple ack, abort, reject, error */
reply.pdu_type = reply_pdu[offset] & 0xF0;
switch (reply.pdu_type) {
case PDU_TYPE_CONFIRMED_SERVICE_REQUEST:
reply.invoke_id = reply_pdu[offset + 2];
/* segmented message? */
if (reply_pdu[offset] & BIT3)
reply.service_choice = reply_pdu[offset + 5];
else
reply.service_choice = reply_pdu[offset + 3];
break;
case PDU_TYPE_SIMPLE_ACK:
reply.invoke_id = reply_pdu[offset + 1];
reply.service_choice = reply_pdu[offset + 2];
break;
case PDU_TYPE_COMPLEX_ACK:
reply.invoke_id = reply_pdu[offset + 1];
/* segmented message? */
if (reply_pdu[offset] & BIT3)
reply.service_choice = reply_pdu[offset + 4];
else
reply.service_choice = reply_pdu[offset + 2];
break;
case PDU_TYPE_ERROR:
reply.invoke_id = reply_pdu[offset + 1];
reply.service_choice = reply_pdu[offset + 2];
break;
case PDU_TYPE_REJECT:
case PDU_TYPE_ABORT:
reply.invoke_id = reply_pdu[offset + 1];
break;
default:
return false;
}
/* these don't have service choice included */
if ((reply.pdu_type == PDU_TYPE_REJECT) ||
(reply.pdu_type == PDU_TYPE_ABORT)) {
if (request.invoke_id != reply.invoke_id) {
return false;
}
} else {
if (request.invoke_id != reply.invoke_id) {
return false;
}
if (request.service_choice != reply.service_choice) {
return false;
}
}
if (request.npdu_data.protocol_version != reply.npdu_data.protocol_version) {
return false;
}
if (request.npdu_data.priority != reply.npdu_data.priority) {
return false;
}
if (!bacnet_address_same(&request.address, &reply.address)) {
return false;
}
return true;
}
uint16_t MSTP_Get_Reply(
volatile struct mstp_port_struct_t * mstp_port,
unsigned timeout)
{ /* milliseconds to wait for a packet */
int received_bytes = 0;
DLMSTP_PACKET packet;
uint16_t pdu_len = 0; /* return value */
uint8_t destination = 0; /* destination address */
bool matched = false;
received_bytes = dlmstp_get_transmit_packet(&packet, timeout);
if (received_bytes <= 0)
return 0;
/* load destination MAC address */
if (packet.address.mac_len == 1) {
destination = packet.address.mac[0];
} else {
return 0;
}
if ((MAX_HEADER + packet.pdu_len) > MAX_MPDU) {
return 0;
}
/* is this the reply to the DER? */
matched =
dlmstp_compare_data_expecting_reply(&mstp_port->InputBuffer[0],
mstp_port->DataLength, mstp_port->SourceAddress,
&packet.pdu[0], packet.pdu_len,
&packet.address);
if (matched) {
#if PRINT_ENABLED
fprintf(stderr,"MSTP: sending packet to FSM.\n");
#endif
/* convert the PDU into the MSTP Frame */
pdu_len = MSTP_Create_Frame(&mstp_port->OutputBuffer[0],
mstp_port->OutputBufferSize, packet.frame_type,
destination, mstp_port->This_Station, &packet.pdu[0],
packet.pdu_len);
/* not used here, but setting it anyway */
packet.ready = false;
} else {
/* put it back into the queue */
(void)mq_send(NPDU_Transmit_Queue, (char *)&packet, sizeof(packet), 1);
}
return pdu_len;
}
void dlmstp_set_mac_address(
uint8_t mac_address)
{
/* Master Nodes can only have address 0-127 */
if (mac_address <= 127) {
MSTP_Port.This_Station = mac_address;
/* FIXME: implement your data storage */
/* I2C_Write_Byte(
EEPROM_DEVICE_ADDRESS,
mac_address,
EEPROM_MSTP_MAC_ADDR); */
if (mac_address > MSTP_Port.Nmax_master)
dlmstp_set_max_master(mac_address);
}
return;
}
uint8_t dlmstp_my_address(
void)
{
return MSTP_Port.This_Station;
}
/* This parameter represents the value of the Max_Info_Frames property of */
/* the node's Device object. The value of Max_Info_Frames specifies the */
/* maximum number of information frames the node may send before it must */
/* pass the token. Max_Info_Frames may have different values on different */
/* nodes. This may be used to allocate more or less of the available link */
/* bandwidth to particular nodes. If Max_Info_Frames is not writable in a */
/* node, its value shall be 1. */
void dlmstp_set_max_info_frames(
uint8_t max_info_frames)
{
if (max_info_frames >= 1) {
MSTP_Port.Nmax_info_frames = max_info_frames;
/* FIXME: implement your data storage */
/* I2C_Write_Byte(
EEPROM_DEVICE_ADDRESS,
(uint8_t)max_info_frames,
EEPROM_MSTP_MAX_INFO_FRAMES_ADDR); */
}
return;
}
uint8_t dlmstp_max_info_frames(
void)
{
return MSTP_Port.Nmax_info_frames;
}
/* This parameter represents the value of the Max_Master property of the */
/* node's Device object. The value of Max_Master specifies the highest */
/* allowable address for master nodes. The value of Max_Master shall be */
/* less than or equal to 127. If Max_Master is not writable in a node, */
/* its value shall be 127. */
void dlmstp_set_max_master(
uint8_t max_master)
{
if (max_master <= 127) {
if (MSTP_Port.This_Station <= max_master) {
MSTP_Port.Nmax_master = max_master;
/* FIXME: implement your data storage */
/* I2C_Write_Byte(
EEPROM_DEVICE_ADDRESS,
max_master,
EEPROM_MSTP_MAX_MASTER_ADDR); */
}
}
return;
}
uint8_t dlmstp_max_master(
void)
{
return MSTP_Port.Nmax_master;
}
void dlmstp_get_my_address(
BACNET_ADDRESS * my_address)
{
int i = 0; /* counter */
my_address->mac_len = 1;
my_address->mac[0] = MSTP_Port.This_Station;
my_address->net = 0; /* local only, no routing */
my_address->len = 0;
for (i = 0; i < MAX_MAC_LEN; i++) {
my_address->adr[i] = 0;
}
return;
}
void dlmstp_get_broadcast_address(
BACNET_ADDRESS * dest)
{ /* destination address */
int i = 0; /* counter */
if (dest) {
dest->mac_len = 1;
dest->mac[0] = MSTP_BROADCAST_ADDRESS;
dest->net = BACNET_BROADCAST_NETWORK;
dest->len = 0; /* always zero when DNET is broadcast */
for (i = 0; i < MAX_MAC_LEN; i++) {
dest->adr[i] = 0;
}
}
return;
}
/* RS485 Baud Rate 9600, 19200, 38400, 57600, 115200 */
void dlmstp_set_baud_rate(
uint32_t baud)
{
RS485_Set_Baud_Rate(baud);
}
uint32_t dlmstp_baud_rate(
void)
{
return RS485_Get_Baud_Rate();
}
void dlmstp_cleanup(
void)
{
mq_close(NPDU_Transmit_Queue);
mq_close(NPDU_Receive_Queue);
RS485_Cleanup();
/* nothing to do for static buffers */
}
bool dlmstp_init(
char *ifname)
{
int rc = 0;
pthread_t hThread;
char mqname[32];
struct mq_attr mqattr;
mqattr.mq_flags = 0;
mqattr.mq_maxmsg = 5;
mqattr.mq_msgsize = sizeof(struct dlmstp_packet);
/* create a queue for the NDPU data between MS/TP threads */
snprintf(mqname, sizeof(mqname), "/MSTP_Rx_%d", getpid());
NPDU_Transmit_Queue = mq_open(mqname,
O_RDWR | O_CREAT, 0600, &mqattr);
if (NPDU_Transmit_Queue == -1) {
#if PRINT_ENABLED
fprintf(stderr, "MS/TP: Create NPDU Transmit Queue %s: %s\n",
mqname,
strerror(errno));
#endif
}
snprintf(mqname, sizeof(mqname), "/MSTP_Tx_%d", getpid());
NPDU_Receive_Queue = mq_open(mqname,
O_RDWR | O_CREAT, 0600, &mqattr);
if (NPDU_Receive_Queue == -1) {
#if PRINT_ENABLED
fprintf(stderr, "MS/TP: Create NPDU Receive Queue %s: %s\n",
mqname,
strerror(errno));
#endif
}
/* initialize hardware */
if (ifname) {
RS485_Set_Interface(ifname);
#if PRINT_ENABLED
fprintf(stderr, "MS/TP Interface: %s\n", ifname);
#endif
}
RS485_Initialize();
MSTP_Port.InputBuffer = &RxBuffer[0];
MSTP_Port.InputBufferSize = sizeof(RxBuffer);
MSTP_Port.OutputBuffer = &TxBuffer[0];
MSTP_Port.OutputBufferSize = sizeof(TxBuffer);
MSTP_Port.SilenceTimer = Timer_Silence;
MSTP_Port.SilenceTimerReset = Timer_Silence_Reset;
MSTP_Init(&MSTP_Port);
#if 0
/* FIXME: implement your data storage */
if (data <= 127)
MSTP_Port.This_Station = data;
else
dlmstp_set_mac_address(DEFAULT_MAC_ADDRESS);
if ((data <= 127) && (data >= MSTP_Port.This_Station))
MSTP_Port.Nmax_master = data;
else
dlmstp_set_max_master(DEFAULT_MAX_MASTER);
if (data >= 1)
MSTP_Port.Nmax_info_frames = data;
else
dlmstp_set_max_info_frames(DEFAULT_MAX_INFO_FRAMES);
#endif
#if PRINT_ENABLED
fprintf(stderr, "MS/TP MAC: %02X\n", MSTP_Port.This_Station);
fprintf(stderr, "MS/TP baud: %u\n", RS485_Get_Baud_Rate());
fprintf(stderr, "MS/TP Max_Master: %02X\n", MSTP_Port.Nmax_master);
fprintf(stderr, "MS/TP Max_Info_Frames: %u\n", MSTP_Port.Nmax_info_frames);
#endif
/* start our MilliSec task */
rc = pthread_create(&hThread, NULL, dlmstp_milliseconds_task, NULL);
rc = pthread_create(&hThread, NULL, dlmstp_fsm_receive_task, NULL);
rc = pthread_create(&hThread, NULL, dlmstp_fsm_master_task, NULL);
return 1;
}
#ifdef TEST_DLMSTP
#include <stdio.h>
static char *Network_Interface = NULL;
int main(
int argc,
char *argv[])
{
uint16_t bytes_received = 0;
BACNET_ADDRESS src; /* source address */
uint8_t pdu[MAX_APDU]; /* PDU data */
#if (defined(MSTP_TEST_REQUEST) && MSTP_TEST_REQUEST)
struct timespec timeOut, remains;
timeOut.tv_sec = 1;
timeOut.tv_nsec = 0; /* 1 millisecond */
#endif
/* argv has the "/dev/ttyS0" or some other device */
if (argc > 1) {
Network_Interface = argv[1];
}
dlmstp_set_baud_rate(38400);
dlmstp_set_mac_address(0x05);
dlmstp_set_max_info_frames(DEFAULT_MAX_INFO_FRAMES);
dlmstp_set_max_master(DEFAULT_MAX_MASTER);
dlmstp_init(Network_Interface);
/* forever task */
for (;;) {
#if (defined(MSTP_TEST_REQUEST) && MSTP_TEST_REQUEST)
MSTP_Create_And_Send_Frame(&MSTP_Port, FRAME_TYPE_TEST_REQUEST,
MSTP_Port.SourceAddress, MSTP_Port.This_Station, NULL, 0);
nanosleep(&timeOut, &remains);
#endif
bytes_received = dlmstp_receive(&src, &pdu[0], sizeof(pdu), 10000);
if (bytes_received) {
#if PRINT_ENABLED
fprintf(stderr, "Received NPDU!\n");
#endif
}
}
return 0;
}
#endif
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