Windows 10 Device Path names character length should be increased

[KG6KZZ]

Windows 10 system has very long path name which are larger than 128 character currently reserved in Direwolf 1.7 dev source code. I have seen length of 135 and 156 characters long for different devices in the search fields for the CM108 HID device path.

The Direwolf initialization fails to detect PTT configuration when this happens.
This require increasing the variable size in the following files.

Jason Kim. KG6KZZ

=======================================================
src/cm108.c // increase devnode.hidraw length to [256] form current [128]
// increase devpath lenght to [256] from current [128]

src/audio.h // increase ptt_device path naem length to [256] form current 128]

diff --git a/src/cm108.c b/src/cm108.c
index 189512d..10c32ba 100644
--- a/src/cm108.c
+++ b/src/cm108.c
@@ -257,10 +257,14 @@ struct thing_s {
char plughw[72]; // Above in more familiar format e.g. plughw:0,0
// Oversized to silence a compiler warning.
char plughw2[72]; // With name rather than number.

• char devpath[128]; // Kernel dev path. Does not include /sys mount point.
• char devnode_hidraw[128]; // e.g. /dev/hidraw3 - for Linux - was length 17

•   		// The Windows path for a HID looks like this, lengths up to 95 seen.
  

• char devpath[256]; //KG6KZZ Kernel dev path. Does not include /sys mount point.
• //KG6KZZ char devpath[128]; // Kernel dev path. Does not include /sys mount point.

•   		// The Windows 10 path for a HID looks like this, lengths up to 95~135 seen. (KG6KZZ)
    		// \\?\hid#vid_0d8c&pid_000c&mi_03#8&164d11c9&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}
  

• char devnode_hidraw[256]; //KG6KZZ e.g. /dev/hidraw3 - for Linux - was length 17
• //KG6KZZ char devnode_hidraw[128]; // e.g. /dev/hidraw3 - for Linux - was length 17

•   		// The Windows 10 path for a HID looks like this, lengths up to 135 seen. (KG6KZZ)
  

•   		// \\?\hid#{00001812-0000-1000-8000-00805f9b34fb}_dev_vid&02046d_pid&b015_rev&0013_ca8fecccba10&col01#9&5d25122&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}\kbd
  

  char devnode_usb[25]; // e.g. /dev/bus/usb/001/012
  // This is what we use to match up audio and HID.
  };

========================================================
@@ -1369,7 +1380,8 @@ int get_input (int it, int chan)
#else
if (save_audio_config_p->achan[chan].ictrl[it].method == PTT_METHOD_GPIO) {
int fd;

• char gpio_value_path[80];
  

• #char gpio_value_path[80];  //KG6KZZ path name length for Windows 10 is long, seen over 150 characters
  

• char gpio_value_path[256];  //KG6KZZ increased to allow longer windows dirver path names
  
  snprintf (gpio_value_path, sizeof(gpio_value_path), "/sys/class/gpio/%s/value", save_audio_config_p->achan[chan].ictrl[it].in_gpio_name);
  

======================================================
diff --git a/src/audio.h b/src/audio.h
index f112f76..93bd03b 100644
--- a/src/audio.h
+++ b/src/audio.h
@@ -55,7 +55,8 @@ typedef enum retry_e {

// Type of communication medium associated with the channel.

-enum medium_e { MEDIUM_NONE = 0, // Channel is not valid for use.
+enum medium_e {

•   MEDIUM_NONE = 0,	// Channel is not valid for use.
    MEDIUM_RADIO,		// Internal modem for radio.
    MEDIUM_IGATE,		// Access IGate as ordinary channel.
    MEDIUM_NETTNC };	// Remote network TNC.  (possible future)
  

@@ -258,7 +259,8 @@ struct audio_s {

        ptt_method_t ptt_method; /* none, serial port, GPIO, LPT, HAMLIB, CM108. */

•       char ptt_device[128];	/* Serial device name for PTT.  e.g. COM1 or /dev/ttyS0 */
  

•       char ptt_device[256];	/* /KG6KZZ Serial device name for PTT.  e.g. COM1 or /dev/ttyS0 */
  

•       //char ptt_device[128];	/* Serial device name for PTT.  e.g. COM1 or /dev/ttyS0 */
    			/* Also used for HAMLIB.  Could be host:port when model is 1. */
    			/* For years, 20 characters was plenty then we start getting extreme names like this: */
    			/* /dev/serial/by-id/usb-FTDI_Navigator__CAT___2nd_PTT__00000000-if00-port0 */
  

@@ -269,6 +271,7 @@ struct audio_s {
/* have a name like /dev/hidraw1 for Linux or /
/ \?\hid#vid_0d8c&pid_0008&mi_03#8&39d3555&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030} /
/ for Windows. Largest observed was 95 but add some extra to be safe. */

•   			/* for Windows.  Largest observed was 135 (KG6KZZ) but add some extra to be safe. */