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Created MS/TP capture tool that captures from USB->RS485 converter and sends data to SNAP Protocol for Wireshark capture.

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This commit is contained in:
skarg
2008-08-17 00:35:18 +00:00
parent 2328f0fe59
commit 0326112c68
5 changed files with 1147 additions and 1 deletions
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bacnet-stack/ports/linux/ethernet.c
+31
View File
@@ -93,6 +93,7 @@ static int ethernet_bind(
char *interface_name)
{
int sock_fd = -1; /* return value */
int sockopt = 0;
int uid = 0;
fprintf(stderr, "ethernet: opening \"%s\"\n", interface_name);
@@ -108,6 +109,8 @@ static int ethernet_bind(
/* modules.conf (or in modutils/alias on Debian with update-modules) */
/* alias net-pf-17 af_packet */
/* Then follow it by: # modprobe af_packet */
/* Note: PF_INET/SOCK_PACKET has been replaced with
PF_PACKET/(SOCK_PACKET, SOCK_DGRAM, SOCK_RAW).*/
/* Attempt to open the socket for 802.2 ethernet frames */
if ((sock_fd = socket(PF_INET, SOCK_PACKET, htons(ETH_P_802_2))) < 0) {
@@ -122,6 +125,15 @@ static int ethernet_bind(
"# modprobe af_packet\n");
exit(-1);
}
#if 0
/* It is very advisable to do a IP_HDRINCL call, to make sure
that the kernel knows the header is included in the data,
and doesn't insert its own header into the packet before our data */
if (setsockopt (sock_fd, IPPROTO_IP, IP_HDRINCL, &sockopt,
sizeof(sockopt)) < 0) {
printf ("Warning: Cannot set HDRINCL!\n");
}
#endif
/* Bind the socket to an address */
eth_addr->sa_family = PF_INET;
/* Clear the memory before copying */
@@ -187,6 +199,25 @@ bool ethernet_init(
return ethernet_valid();
}
int ethernet_send(
uint8_t * mtu,
int mtu_len)
{
int bytes = 0;
/* Send the packet */
bytes =
sendto(eth802_sockfd, &mtu, mtu_len, 0, (struct sockaddr *) &eth_addr,
sizeof(struct sockaddr));
/* did it get sent? */
if (bytes < 0)
fprintf(stderr, "ethernet: Error sending packet: %s\n",
strerror(errno));
return bytes;
}
/* function to send a packet out the 802.2 socket */
/* returns number of bytes sent on success, negative on failure */
int ethernet_send_pdu(
bacnet-stack/ports/linux/mstpsnap.c
+321
View File
@@ -0,0 +1,321 @@
/*####COPYRIGHTBEGIN####
-------------------------------------------
Copyright (C) 2008 Steve Karg
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
The Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307
USA.
As a special exception, if other files instantiate templates or
use macros or inline functions from this file, or you compile
this file and link it with other works to produce a work based
on this file, this file does not by itself cause the resulting
work to be covered by the GNU General Public License. However
the source code for this file must still be made available in
accordance with section (3) of the GNU General Public License.
This exception does not invalidate any other reasons why a work
based on this file might be covered by the GNU General Public
License.
-------------------------------------------
####COPYRIGHTEND####*/
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
/* OS specific include*/
#include "net.h"
/* local includes */
#include "bytes.h"
#include "rs485.h"
#include "crc.h"
#include "mstp.h"
#include "mstptext.h"
#include "bacint.h"
/* local port data - shared with RS-485 */
static volatile struct mstp_port_struct_t MSTP_Port;
/* buffers needed by mstp port struct */
static uint8_t RxBuffer[MAX_MPDU];
static uint8_t TxBuffer[MAX_MPDU];
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);
}
void *milliseconds_task(
void *pArg)
{
struct timespec timeOut, remains;
timeOut.tv_sec = 0;
timeOut.tv_nsec = 10000000; /* 1 milliseconds */
for (;;) {
nanosleep(&timeOut, &remains);
dlmstp_millisecond_timer();
}
return NULL;
}
/* functions used by the MS/TP state machine to put or get data */
uint16_t MSTP_Put_Receive(
volatile struct mstp_port_struct_t * mstp_port)
{
(void) mstp_port;
return 0;
}
/* 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 */
(void) mstp_port;
(void) timeout;
return 0;
}
uint16_t MSTP_Get_Reply(
volatile struct mstp_port_struct_t * mstp_port,
unsigned timeout)
{ /* milliseconds to wait for a packet */
(void) mstp_port;
(void) timeout;
return 0;
}
static int network_init(const char *name, int protocol)
{
/* check to see if we are being run as root */
if (getuid() != 0) {
fprintf(stderr,
"Requires root priveleges.\n");
return -1;
}
int sockfd = socket(PF_PACKET, SOCK_RAW, htons(protocol));
if (sockfd == -1) {
perror("Unable to create socket");
return sockfd;
}
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strncpy(ifr.ifr_name, name, strlen(name));
if (ioctl(sockfd, SIOCGIFINDEX, &ifr) == -1) {
perror("Unable to get interface index");
return -1;
}
struct sockaddr_ll sll;
memset(&sll, 0, sizeof(sll));
sll.sll_family = AF_PACKET;
sll.sll_ifindex = ifr.ifr_ifindex;
sll.sll_protocol = htons(protocol);
if (bind(sockfd, (struct sockaddr *) &sll, sizeof(sll)) == -1) {
perror("Unable to bind socket");
return -1;
}
return sockfd;
}
static void snap_received_packet(
volatile struct mstp_port_struct_t *mstp_port,
int sockfd)
{
uint16_t mtu_len = 0; /* number of octets of packet saved in file */
unsigned i = 0; /* counter */
static uint8_t mtu[1500] = {0};
mtu[0] = 0;
mtu[1] = 0;
mtu[2] = 0;
mtu[3] = 0;
mtu[4] = 0;
mtu[5] = mstp_port->DestinationAddress;
mtu[6] = 0;
mtu[7] = 0;
mtu[8] = 0;
mtu[9] = 0;
mtu[10] = 0;
mtu[11]= mstp_port->SourceAddress;
/* length - 12, 13 */
mtu[14] = 0xaa; /* DSAP for SNAP */
mtu[15] = 0xaa; /* SSAP for SNAP */
mtu[16] = 0x03; /* Control Field for SNAP */
mtu[17] = 0x00; /* Organization Code: Cimetrics */
mtu[18] = 0x10; /* Organization Code: Cimetrics */
mtu[19] = 0x90; /* Organization Code: Cimetrics */
mtu[20] = 0x00; /* Protocol ID */
mtu[21] = 0x01; /* Protocol ID */
mtu[22] = 0x00; /* delta time */
mtu[23] = 0x00; /* delta time */
mtu[24] = 0x80; /* unknown byte */
mtu[25] = mstp_port->FrameType;
mtu[26] = mstp_port->DestinationAddress;
mtu[27] = mstp_port->SourceAddress;
mtu[28] = HI_BYTE(mstp_port->DataLength);
mtu[29] = LO_BYTE(mstp_port->DataLength);
mtu[30] = mstp_port->HeaderCRCActual;
mtu_len = 31;
if (mstp_port->DataLength) {
for (i = 0; i < mstp_port->DataLength; i++) {
mtu[31+i] = mstp_port->InputBuffer[i];
}
mtu[31+mstp_port->DataLength] = mstp_port->DataCRCActualMSB;
mtu[31+mstp_port->DataLength+1] = mstp_port->DataCRCActualLSB;
mtu_len += (mstp_port->DataLength+2);
}
/* Ethernet length is data only - not address or length bytes */
encode_unsigned16(&mtu[12], mtu_len-14);
write(sockfd,&mtu[0], mtu_len);
}
static void cleanup(
void)
{
}
#if (!defined(_WIN32))
static void sig_int(
int signo)
{
(void) signo;
cleanup();
exit(0);
}
void signal_init(
void)
{
signal(SIGINT, sig_int);
signal(SIGHUP, sig_int);
signal(SIGTERM, sig_int);
}
#endif
/* simple test to packetize the data and print it */
int main(
int argc,
char *argv[])
{
volatile struct mstp_port_struct_t *mstp_port;
long my_baud = 38400;
uint32_t packet_count = 0;
#if defined(_WIN32)
unsigned long hThread = 0;
uint32_t arg_value = 0;
#else
int rc = 0;
pthread_t hThread;
#endif
int sockfd = -1;
char *my_interface = "eth0";
/* mimic our pointer in the state machine */
mstp_port = &MSTP_Port;
/* initialize our interface */
if (argc > 1) {
RS485_Set_Interface(argv[1]);
}
if (argc > 2) {
my_baud = strtol(argv[2], NULL, 0);
}
if (argc > 3) {
my_interface = argv[3];
}
sockfd = network_init(my_interface, ETH_P_ALL);
if (sockfd == -1) {
return 1;
}
RS485_Set_Baud_Rate(my_baud);
RS485_Initialize();
MSTP_Port.InputBuffer = &RxBuffer[0];
MSTP_Port.InputBufferSize = sizeof(RxBuffer);
MSTP_Port.OutputBuffer = &TxBuffer[0];
MSTP_Port.OutputBufferSize = sizeof(TxBuffer);
MSTP_Port.This_Station = 127;
MSTP_Port.Nmax_info_frames = 1;
MSTP_Port.Nmax_master = 127;
MSTP_Port.SilenceTimer = Timer_Silence;
MSTP_Port.SilenceTimerReset = Timer_Silence_Reset;
MSTP_Init(mstp_port);
mstp_port->Lurking = true;
fprintf(stdout, "mstpcap: Using %s for capture at %ld bps.\n",
RS485_Interface(), (long) RS485_Get_Baud_Rate());
#if defined(_WIN32)
hThread = _beginthread(milliseconds_task, 4096, &arg_value);
if (hThread == 0) {
fprintf(stderr, "Failed to start timer task\n");
}
(void) SetThreadPriority(GetCurrentThread(),
THREAD_PRIORITY_TIME_CRITICAL);
#else
/* start our MilliSec task */
rc = pthread_create(&hThread, NULL, milliseconds_task, NULL);
signal_init();
#endif
atexit(cleanup);
/* run forever */
for (;;) {
RS485_Check_UART_Data(mstp_port);
MSTP_Receive_Frame_FSM(mstp_port);
/* process the data portion of the frame */
if (mstp_port->ReceivedValidFrame) {
mstp_port->ReceivedValidFrame = false;
snap_received_packet(mstp_port, sockfd);
packet_count++;
} else if (mstp_port->ReceivedInvalidFrame) {
mstp_port->ReceivedInvalidFrame = false;
fprintf(stderr, "ReceivedInvalidFrame\n");
snap_received_packet(mstp_port, sockfd);
packet_count++;
}
if (!(packet_count % 100)) {
fprintf(stdout, "\r%hu packets", packet_count);
}
}
return 0;
}
bacnet-stack/ports/linux/mstpsnap.mak
+63
View File
@@ -0,0 +1,63 @@
#Makefile to build BACnet Application for the Linux Port
# Compiler to use
CC = gcc
# Executable file name
TARGET = mstpsnap
# Configure the BACnet Datalink Layer
BACDL_DEFINE = -DBACDL_MSTP
BACNET_DEFINES = -DPRINT_ENABLED=1 -DBACAPP_ALL -DBACFILE
DEFINES = $(BACNET_DEFINES) $(BACDL_DEFINE)
# Directories
BACNET_PORT = linux
BACNET_PORT_DIR = .
BACNET_SOURCE_DIR = ../../src
BACNET_INCLUDE = ../../include
# Compiler Setup
INCLUDES = -I$(BACNET_INCLUDE) -I$(BACNET_PORT_DIR)
ifeq (${BACNET_PORT},linux)
PFLAGS = -pthread
TARGET_BIN = ${TARGET}
LIBRARIES=-lc,-lgcc,-lrt,-lm
endif
ifeq (${BACNET_PORT},win32)
TARGET_BIN = ${TARGET}.exe
LIBRARIES=-lws2_32,-lgcc,-lm,-liphlpapi
endif
#DEBUGGING = -g
#OPTIMIZATION = -O0
OPTIMIZATION = -Os
CFLAGS = -Wall $(DEBUGGING) $(OPTIMIZATION) $(INCLUDES) $(DEFINES) -fdata-sections -ffunction-sections
LFLAGS = -Wl,-Map=$(TARGET).map,$(LIBRARIES),--gc-sections
SRCS = mstpsnap.c \
${BACNET_PORT_DIR}/rs485.c \
${BACNET_SOURCE_DIR}/bacint.c \
${BACNET_SOURCE_DIR}/mstp.c \
${BACNET_SOURCE_DIR}/mstptext.c \
${BACNET_SOURCE_DIR}/debug.c \
${BACNET_SOURCE_DIR}/indtext.c \
${BACNET_SOURCE_DIR}/crc.c
OBJS = ${SRCS:.c=.o}
all: ${TARGET_BIN}
size ${TARGET_BIN}
${TARGET_BIN}: ${OBJS}
${CC} ${PFLAGS} ${OBJS} ${LFLAGS} -o $@
.c.o:
${CC} -c ${CFLAGS} $*.c -o $@
depend:
rm -f .depend
${CC} -MM ${CFLAGS} *.c >> .depend
clean:
rm -f core ${TARGET_BIN} ${OBJS}
include: .depend