Opening of device done, and it is set as active

This commit is contained in:
Erik Ekman 2009-01-25 10:56:32 +00:00
parent 0c4c529142
commit a939ad4f16

112
src/tun.c
View File

@ -26,21 +26,33 @@
#ifdef WINDOWS32 #ifdef WINDOWS32
#include <winsock.h> #include <winsock.h>
#include <winioctl.h>
#include "windows.h" #include "windows.h"
HANDLE dev_handle;
#define TAP_CONTROL_CODE(request,method) CTL_CODE(FILE_DEVICE_UNKNOWN, request, method, FILE_ANY_ACCESS)
#define TAP_IOCTL_CONFIG_TUN TAP_CONTROL_CODE(10, METHOD_BUFFERED)
#define TAP_IOCTL_SET_MEDIA_STATUS TAP_CONTROL_CODE(6, METHOD_BUFFERED)
#define TAP_ADAPTER_KEY "SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-BFC1-08002BE10318}"
#define TAP_DEVICE_SPACE "\\\\.\\Global\\"
#define TAP_COMPONENT_ID "tap0801"
#define KEY_COMPONENT_ID "ComponentId"
#define NET_CFG_INST_ID "NetCfgInstanceId"
#else #else
#include <err.h> #include <err.h>
#include <arpa/inet.h> #include <arpa/inet.h>
#include <netinet/in.h> #include <netinet/in.h>
#define TUN_MAX_TRY 50
char if_name[50];
#endif #endif
#include "plibc.h" #include "plibc.h"
#include "tun.h" #include "tun.h"
#include "common.h" #include "common.h"
#define TUN_MAX_TRY 50
char if_name[50];
#ifndef WINDOWS32 #ifndef WINDOWS32
#ifdef LINUX #ifdef LINUX
@ -144,10 +156,95 @@ open_tun(const char *tun_device)
#endif /* !LINUX */ #endif /* !LINUX */
#else /* WINDOWS32 */ #else /* WINDOWS32 */
static void
get_device(char *device, int device_len)
{
LONG status;
HKEY adapter_key;
int index;
index = 0;
status = RegOpenKeyEx(HKEY_LOCAL_MACHINE, TAP_ADAPTER_KEY, 0, KEY_READ, &adapter_key);
if (status != ERROR_SUCCESS) {
warnx("Error opening registry key " TAP_ADAPTER_KEY );
return;
}
while (TRUE) {
char name[256];
char unit[256];
char component[256];
char cid_string[256] = KEY_COMPONENT_ID;
HKEY device_key;
DWORD datatype;
DWORD len;
/* Iterate through all adapter of this kind */
len = sizeof(name);
status = RegEnumKeyEx(adapter_key, index, name, &len, NULL, NULL, NULL, NULL);
if (status == ERROR_NO_MORE_ITEMS) {
break;
} else if (status != ERROR_SUCCESS) {
warnx("Error enumerating subkeys of registry key " TAP_ADAPTER_KEY );
break;
}
snprintf(unit, sizeof(unit), TAP_ADAPTER_KEY "\\%s", name);
status = RegOpenKeyEx(HKEY_LOCAL_MACHINE, unit, 0, KEY_READ, &device_key);
if (status != ERROR_SUCCESS) {
warnx("Error opening registry key %s", unit);
goto next;
}
/* Check component id */
len = sizeof(component);
status = RegQueryValueEx(device_key, cid_string, NULL, &datatype, (LPBYTE)component, &len);
if (status != ERROR_SUCCESS || datatype != REG_SZ) {
goto next;
}
if (strncmp(TAP_COMPONENT_ID, component, strlen(TAP_COMPONENT_ID)) == 0) {
/* We found a TAP32 device, get its NetCfgInstanceId */
char iid_string[256] = NET_CFG_INST_ID;
status = RegQueryValueEx(device_key, iid_string, NULL, &datatype, (LPBYTE) device, (DWORD *) &device_len);
if (status != ERROR_SUCCESS || datatype != REG_SZ) {
warnx("Error reading registry key %s\\%s on TAP device", unit, iid_string);
} else {
/* Done getting name of TAP device */
RegCloseKey(device_key);
return;
}
}
next:
RegCloseKey(device_key);
index++;
}
RegCloseKey(adapter_key);
}
int int
open_tun(const char *tun_device) open_tun(const char *tun_device)
{ {
return 10; char adapter[256];
char tapfile[512];
memset(adapter, 0, sizeof(adapter));
get_device(adapter, sizeof(adapter));
if (strlen(adapter) == 0)
return -1;
snprintf(tapfile, sizeof(tapfile), "%s%s.tap", TAP_DEVICE_SPACE, adapter);
printf("Opening device %s\n", tapfile);
dev_handle = CreateFile(tapfile, GENERIC_WRITE | GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM, 0);
if (dev_handle == INVALID_HANDLE_VALUE) {
return -1;
}
printf("Opened handle: %p\n", dev_handle);
return (int) dev_handle;
} }
#endif #endif
@ -242,7 +339,12 @@ tun_setip(const char *ip, int netbits)
return 1; return 1;
#else /* WINDOWS32 */ #else /* WINDOWS32 */
DWORD status;
DWORD len;
/* Set device as connected */
status = 1;
DeviceIoControl(dev_handle, TAP_IOCTL_SET_MEDIA_STATUS, &status, sizeof(status), &status, sizeof(status), &len, NULL);
return 0; return 0;
#endif #endif
} }