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[r3066] Added Wireshark 2.x extcap live capture for mstpcap on Linux.

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Author: skarg@r3066
This commit is contained in:
Patrick Grimm
2016-10-30 02:12:09 +02:00
parent b1b85404f9
commit d6dea9fbd5
1 changed files with 69 additions and 4 deletions
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73
ports/linux/rs485.c
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@@ -57,6 +57,10 @@
#include <linux/serial.h> /* for struct serial_struct */
#include <math.h> /* for calculation of custom divisor */
#include <sys/ioctl.h>
/* for scandir */
#include <dirent.h>
/* for basename */
#include <libgen.h>
/* Local includes */
#include "mstp.h"
@@ -624,12 +628,73 @@ void RS485_Initialize(
printf("=success!\n");
}
/* Print in a format for Wireshark ExtCap */
void RS485_Print_Ports(void)
{
/* note: format for Wireshark ExtCap */
//printf("interface {value=/dev/ttyUSB%u}"
// "{display=MS/TP Capture on /dev/ttyUSB%u}\n", i, i);
/* FIXME: add code to print ports */
int n;
struct dirent **namelist;
const char* sysdir = "/sys/class/tty/";
struct stat st;
char buffer[1024];
char device_dir[1024];
char *driver_name = NULL;
int fd = 0;
bool valid_port = false;
struct serial_struct serinfo;
// Scan through /sys/class/tty - it contains all tty-devices in the system
n = scandir(sysdir, &namelist, NULL, NULL);
if (n < 0) {
perror("RS485: scandir");
} else {
while (n--) {
if (strcmp(namelist[n]->d_name,"..") &&
strcmp(namelist[n]->d_name,".")) {
snprintf(device_dir, sizeof(device_dir),
"%s%s/device",
sysdir, namelist[n]->d_name);
// Stat the devicedir and handle it if it is a symlink
if (lstat(device_dir, &st)==0 && S_ISLNK(st.st_mode)) {
memset(buffer, 0, sizeof(buffer));
snprintf(device_dir, sizeof(device_dir),
"%s%s/device/driver",
sysdir, namelist[n]->d_name);
if (readlink(device_dir, buffer, sizeof(buffer)) > 0) {
valid_port = false;
driver_name=basename(buffer);
if (strcmp(driver_name,"serial8250") == 0) {
// serial8250-devices must be probed
snprintf(device_dir, sizeof(device_dir),
"/dev/%s", namelist[n]->d_name);
fd = open(device_dir,
O_RDWR | O_NONBLOCK | O_NOCTTY);
if (fd >= 0) {
// Get serial_info
if (ioctl(fd, TIOCGSERIAL, &serinfo)==0) {
// If device type is not PORT_UNKNOWN
// we accept the port
if (serinfo.type != PORT_UNKNOWN) {
valid_port = true;
}
}
close(fd);
}
} else {
valid_port = true;
}
if (valid_port) {
// print full absolute file path
printf("interface {value=/dev/%s}"
"{display=MS/TP Capture on /dev/%s}\n",
namelist[n]->d_name, namelist[n]->d_name);
}
}
}
}
free(namelist[n]);
}
free(namelist);
}
}
#ifdef TEST_RS485