kdxcxs
/
n2n
mirror of https://github.com/ntop/n2n.git
1
0
Fork 0
Code Issues Releases Wiki Activity
Browse Source

Print available Windows TAP devices after help

pull/155/head
emanuele-f 5 years ago
parent
6d38d4bfb4
commit
09707660a1
3 changed files with 92 additions and 64 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 5
      edge.c
  2. 140
      win32/wintap.c
  3. 1
      win32/wintap.h

5
edge.c
View File

@ -173,6 +173,11 @@ static void help() {
printf("\nEnvironment variables:\n");
printf(" N2N_KEY | Encryption key (ASCII). Not with -k.\n");
#ifdef WIN32
printf("\nAvailable TAP adapters:\n");
win_print_available_adapters();
#endif
exit(0);
}

140
win32/wintap.c
View File

@ -5,6 +5,8 @@
#include "../n2n.h"
#include "n2n_win32.h"
/* ***************************************************** */
void initWin32() {
WSADATA wsaData;
int err;
@ -18,29 +20,24 @@ void initWin32() {
}
}
int open_wintap(struct tuntap_dev *device,
const char * devname,
const char * address_mode, /* "static" or "dhcp" */
char *device_ip,
char *device_mask,
const char *device_mac,
int mtu) {
HKEY key, key2;
LONG rc;
char regpath[1024], cmd[256];
struct win_adapter_info {
HANDLE handle;
char adapterid[1024];
char adaptername[1024];
};
/* ***************************************************** */
static void iterate_win_network_adapters(
int (*callback)(struct win_adapter_info*, struct tuntap_dev *),
void *userdata) {
HKEY key, key2;
char regpath[1024];
char tapname[1024];
long len;
long len, rc;
int found = 0;
int err, i;
ULONG status = TRUE;
memset(device, 0, sizeof(struct tuntap_dev));
device->device_handle = INVALID_HANDLE_VALUE;
device->device_name = devname[0] ? devname : NULL;
device->ifName = NULL;
device->ip_addr = inet_addr(device_ip);
struct win_adapter_info adapter;
/* Open registry and look for network adapters */
if((rc = RegOpenKeyEx(HKEY_LOCAL_MACHINE, NETWORK_CONNECTIONS_KEY, 0, KEY_READ, &key))) {
@ -53,79 +50,104 @@ int open_wintap(struct tuntap_dev *device,
}
for (i = 0; ; i++) {
len = sizeof(adapterid);
if(RegEnumKeyEx(key, i, (LPTSTR)adapterid, &len, 0, 0, 0, NULL))
len = sizeof(adapter.adapterid);
if(RegEnumKeyEx(key, i, (LPTSTR)adapter.adapterid, &len, 0, 0, 0, NULL))
break;
/* Find out more about this adapter */
_snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapterid);
_snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapter.adapterid);
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, (LPCSTR)regpath, 0, KEY_READ, &key2))
continue;
len = sizeof(adaptername);
err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len);
len = sizeof(adapter.adaptername);
err = RegQueryValueEx(key2, "Name", 0, 0, adapter.adaptername, &len);
RegCloseKey(key2);
if(err)
continue;
if(device->device_name) {
if(!strcmp(device->device_name, adapterid)) {
found = 1;
break;
} else
continue;
}
if(device->ifName) {
if(!strcmp(device->ifName, adaptername)) {
found = 1;
break;
} else
continue;
}
_snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
device->device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ,
_snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapter.adapterid);
adapter.handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ,
0, /* Don't let other processes share or open
the resource until the handle's been closed */
0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
if(device->device_handle != INVALID_HANDLE_VALUE) {
found = 1;
if(adapter.handle != INVALID_HANDLE_VALUE) {
/* Valid device, use the callback */
if(!callback(&adapter, userdata))
break;
else
CloseHandle(adapter.handle);
/* continue */
}
}
RegCloseKey(key);
}
if(!found) {
printf("No Windows tap device found!\n");
exit(0);
}
/* ***************************************************** */
/* ************************************** */
static int print_adapter_callback(struct win_adapter_info *adapter, void *userdata) {
printf(" %s - %s\n", adapter->adapterid, adapter->adaptername);
}
if(!device->device_name)
device->device_name = _strdup(adapterid);
void win_print_available_adapters() {
iterate_win_network_adapters(print_adapter_callback, NULL);
}
if(!device->ifName)
device->ifName = _strdup(adaptername);
/* ***************************************************** */
/* Try to open the corresponding tap device->device_name */
static int choose_adapter_callback(struct win_adapter_info *adapter, void *userdata) {
struct tuntap_dev *device = (struct tuntap_dev *)userdata;
if(device->device_handle == INVALID_HANDLE_VALUE) {
_snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device->device_name);
device->device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0,
OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
if(device->device_name) {
/* A device name filter was set, name must match */
if(strcmp(device->device_name, adapter->adapterid) &&
strcmp(device->device_name, adapter->adaptername)) {
/* Not found, continue */
return(1);
}
} /* otherwise just pick the first available adapter */
/* Adapter found, break */
device->device_handle = adapter->handle;
device->device_name = _strdup(adapter->adapterid);
device->ifName = _strdup(adapter->adaptername);
return(0);
}
/* ***************************************************** */
int open_wintap(struct tuntap_dev *device,
const char * devname,
const char * address_mode, /* "static" or "dhcp" */
char *device_ip,
char *device_mask,
const char *device_mac,
int mtu) {
char cmd[256];
int len;
ULONG status = TRUE;
memset(device, 0, sizeof(struct tuntap_dev));
device->device_handle = INVALID_HANDLE_VALUE;
device->device_name = devname[0] ? devname : NULL;
device->ifName = NULL;
device->ip_addr = inet_addr(device_ip);
iterate_win_network_adapters(choose_adapter_callback, device);
if(device->device_handle == INVALID_HANDLE_VALUE) {
printf("%s (%s) is not a usable Windows tap device\n", device->device_name, device->ifName);
exit(-1);
if(!devname)
printf("No Windows tap devices found, did you run tapinstall.exe?\n");
else
printf("Cannot find tap device \"%s\"\n", devname);
exit(0);
}
/* ************************************** */
/* Get MAC address from tap device->device_name */
if(!DeviceIoControl(device->device_handle, TAP_IOCTL_GET_MAC,

1
win32/wintap.h
View File

@ -63,5 +63,6 @@
#define TAP_COMPONENT_ID "tap0801"
extern void initWin32();
extern void win_print_available_adapters();
#endif
Write Preview
Loading…
Cancel
Save