Cleanups and error messages.

[oweals/tinc.git] / src / cygwin / device.c

diff --git a/src/cygwin/device.c b/src/cygwin/device.c
index cbfebc23866a85ff22078374b063b29041e7fa07..e5f5354b04b3e28d7f2ac4f171f45df9714b39ab 100644 (file)
--- a/src/cygwin/device.c
+++ b/src/cygwin/device.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: device.c,v 1.1.2.14 2003/07/29 23:21:01 guus Exp $
+    $Id: device.c,v 1.1.2.15 2003/08/02 21:33:18 guus Exp $
 */
 
 #include "system.h"
@@ -32,15 +32,11 @@
 #include "utils.h"
 #include "xalloc.h"
 
-#define NETCARD_REG_KEY_2000 "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
-#define NETCARD_REG_KEY      "SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\NetworkCards"
-#define REG_SERVICE_KEY      "SYSTEM\\CurrentControlSet\\Services"
-#define REG_CONTROL_NET      "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
+#define REG_CONTROL_NET "SYSTEM\\CurrentControlSet\\Control\\Network\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
 
 #define USERMODEDEVICEDIR "\\\\.\\"
-#define SYSDEVICEDIR  "\\Device\\"
 #define USERDEVICEDIR "\\??\\"
-#define TAPSUFFIX     ".tap"
+#define TAPSUFFIX ".tap"
 
 #define TAP_CONTROL_CODE(request,method) CTL_CODE(FILE_DEVICE_PHYSICAL_NETCARD | 8000, request, method, FILE_ANY_ACCESS)
 
@@ -48,10 +44,8 @@
 #define TAP_IOCTL_GET_MAC        TAP_CONTROL_CODE(1, METHOD_BUFFERED)
 #define TAP_IOCTL_SET_STATISTICS TAP_CONTROL_CODE(2, METHOD_BUFFERED)
 
-/* FIXME: This only works for Windows 2000 */
-#define OSTYPE 5
-
 int device_fd = -1;
+static HANDLE device_handle = INVALID_HANDLE_VALUE;
 char *device = NULL;
 char *iface = NULL;
 char *device_info = NULL;
@@ -59,8 +53,6 @@ char *device_info = NULL;
 int device_total_in = 0;
 int device_total_out = 0;
 
-HANDLE handle;
-
 pid_t reader_pid;
 int sp[2];
 
@@ -86,7 +78,7 @@ bool setup_device(void)
        /* Open registry and look for network adapters */
 
        if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, REG_CONTROL_NET, 0, KEY_READ, &key)) {
-               logger(LOG_ERR, _("Unable to read registry"));
+               logger(LOG_ERR, _("Unable to read registry: %s"), winerror(GetLastError()));
                return false;
        }
 
@@ -124,9 +116,9 @@ bool setup_device(void)
                }
 
                snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
-               handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0);
-               if(handle != INVALID_HANDLE_VALUE) {
-                       CloseHandle(handle);
+               device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0);
+               if(device_handle != INVALID_HANDLE_VALUE) {
+                       CloseHandle(device_handle);
                        found = true;
                        break;
                }
@@ -158,10 +150,10 @@ bool setup_device(void)
 
        /* The parent opens the tap device for writing. */
        
-       handle = CreateFile(tapname, GENERIC_WRITE,  FILE_SHARE_READ,  0,  OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0);
+       device_handle = CreateFile(tapname, GENERIC_WRITE,  FILE_SHARE_READ,  0,  OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM , 0);
        
-       if(handle == INVALID_HANDLE_VALUE) {
-               logger(LOG_ERR, _("Could not open Windows tap device for writing!"));
+       if(device_handle == INVALID_HANDLE_VALUE) {
+               logger(LOG_ERR, _("Could not open Windows tap device for writing: %s"), winerror(GetLastError()));
                return false;
        }
 
@@ -169,8 +161,8 @@ bool setup_device(void)
 
        /* Get MAC address from tap device */
 
-       if(!DeviceIoControl(handle, TAP_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0)) {
-               logger(LOG_ERR, _("Could not get MAC address from Windows tap device!"));
+       if(!DeviceIoControl(device_handle, TAP_IOCTL_GET_MAC, mymac.x, sizeof(mymac.x), mymac.x, sizeof(mymac.x), &len, 0)) {
+               logger(LOG_ERR, _("Could not get MAC address from Windows tap device: %s"), winerror(GetLastError()));
                return false;
        }
 
@@ -194,12 +186,12 @@ bool setup_device(void)
                char buf[MTU];
                long lenin;
 
-               CloseHandle(handle);
+               CloseHandle(device_handle);
 
-               handle = CreateFile(tapname, GENERIC_READ, FILE_SHARE_WRITE, 0,  OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0);
+               device_handle = CreateFile(tapname, GENERIC_READ, FILE_SHARE_WRITE, 0,  OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0);
 
-               if(handle == INVALID_HANDLE_VALUE) {
-                       logger(LOG_ERR, _("Could not open Windows tap device for reading!"));
+               if(device_handle == INVALID_HANDLE_VALUE) {
+                       logger(LOG_ERR, _("Could not open Windows tap device for reading: %s"), winerror(GetLastError()));
                        buf[0] = 0;
                        write(sp[1], buf, 1);
                        exit(1);
@@ -215,7 +207,7 @@ bool setup_device(void)
                /* Pass packets */
 
                for(;;) {
-                       ReadFile(handle, buf, MTU, &lenin, NULL);
+                       ReadFile(device_handle, buf, MTU, &lenin, NULL);
                        write(sp[1], buf, lenin);
                }
        }
@@ -239,7 +231,7 @@ void close_device(void)
 
        close(sp[0]);
        close(sp[1]);
-       CloseHandle(handle);
+       CloseHandle(device_handle);
 
        kill(reader_pid, SIGKILL);
 }
@@ -275,8 +267,8 @@ bool write_packet(vpn_packet_t *packet)
        ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Writing packet of %d bytes to %s"),
                           packet->len, device_info);
 
-       if(!WriteFile (handle, packet->data, packet->len, &lenout, NULL)) {
-               logger(LOG_ERR, _("Error while writing to %s %s"), device_info, device);
+       if(!WriteFile (device_handle, packet->data, packet->len, &lenout, NULL)) {
+               logger(LOG_ERR, _("Error while writing to %s %s: %s"), device_info, device, winerror(GetLastError()));
                return false;
        }