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https://github.com/ntop/n2n.git
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Print available Windows TAP devices after help
This commit is contained in:
emanuele-f
parent
6d38d4bfb4
commit
09707660a1
5
edge.c
5
edge.c
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@ -173,6 +173,11 @@ static void help() {
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printf("\nEnvironment variables:\n");
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printf(" N2N_KEY | Encryption key (ASCII). Not with -k.\n");
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#ifdef WIN32
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printf("\nAvailable TAP adapters:\n");
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win_print_available_adapters();
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#endif
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exit(0);
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}
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158
win32/wintap.c
158
win32/wintap.c
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@ -5,6 +5,8 @@
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#include "../n2n.h"
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#include "n2n_win32.h"
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/* ***************************************************** */
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void initWin32() {
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WSADATA wsaData;
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int err;
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@ -18,29 +20,24 @@ void initWin32() {
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}
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}
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int open_wintap(struct tuntap_dev *device,
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const char * devname,
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const char * address_mode, /* "static" or "dhcp" */
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char *device_ip,
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char *device_mask,
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const char *device_mac,
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int mtu) {
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HKEY key, key2;
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LONG rc;
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char regpath[1024], cmd[256];
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struct win_adapter_info {
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HANDLE handle;
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char adapterid[1024];
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char adaptername[1024];
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};
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/* ***************************************************** */
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static void iterate_win_network_adapters(
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int (*callback)(struct win_adapter_info*, struct tuntap_dev *),
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void *userdata) {
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HKEY key, key2;
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char regpath[1024];
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char tapname[1024];
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long len;
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long len, rc;
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int found = 0;
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int err, i;
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ULONG status = TRUE;
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memset(device, 0, sizeof(struct tuntap_dev));
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device->device_handle = INVALID_HANDLE_VALUE;
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device->device_name = devname[0] ? devname : NULL;
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device->ifName = NULL;
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device->ip_addr = inet_addr(device_ip);
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struct win_adapter_info adapter;
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/* Open registry and look for network adapters */
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if((rc = RegOpenKeyEx(HKEY_LOCAL_MACHINE, NETWORK_CONNECTIONS_KEY, 0, KEY_READ, &key))) {
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@ -53,79 +50,104 @@ int open_wintap(struct tuntap_dev *device,
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}
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for (i = 0; ; i++) {
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len = sizeof(adapterid);
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if(RegEnumKeyEx(key, i, (LPTSTR)adapterid, &len, 0, 0, 0, NULL))
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len = sizeof(adapter.adapterid);
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if(RegEnumKeyEx(key, i, (LPTSTR)adapter.adapterid, &len, 0, 0, 0, NULL))
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break;
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/* Find out more about this adapter */
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_snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapterid);
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_snprintf(regpath, sizeof(regpath), "%s\\%s\\Connection", NETWORK_CONNECTIONS_KEY, adapter.adapterid);
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if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, (LPCSTR)regpath, 0, KEY_READ, &key2))
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continue;
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len = sizeof(adaptername);
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err = RegQueryValueEx(key2, "Name", 0, 0, adaptername, &len);
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len = sizeof(adapter.adaptername);
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err = RegQueryValueEx(key2, "Name", 0, 0, adapter.adaptername, &len);
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RegCloseKey(key2);
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if(err)
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continue;
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if(device->device_name) {
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if(!strcmp(device->device_name, adapterid)) {
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found = 1;
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break;
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} else
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continue;
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}
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if(device->ifName) {
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if(!strcmp(device->ifName, adaptername)) {
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found = 1;
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break;
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} else
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continue;
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}
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_snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapterid);
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device->device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ,
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0, /* Don't let other processes share or open
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the resource until the handle's been closed */
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0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
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if(device->device_handle != INVALID_HANDLE_VALUE) {
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found = 1;
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break;
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_snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, adapter.adapterid);
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adapter.handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ,
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0, /* Don't let other processes share or open
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the resource until the handle's been closed */
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0, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
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if(adapter.handle != INVALID_HANDLE_VALUE) {
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/* Valid device, use the callback */
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if(!callback(&adapter, userdata))
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break;
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else
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CloseHandle(adapter.handle);
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/* continue */
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}
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}
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RegCloseKey(key);
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}
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if(!found) {
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printf("No Windows tap device found!\n");
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/* ***************************************************** */
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static int print_adapter_callback(struct win_adapter_info *adapter, void *userdata) {
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printf(" %s - %s\n", adapter->adapterid, adapter->adaptername);
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}
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void win_print_available_adapters() {
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iterate_win_network_adapters(print_adapter_callback, NULL);
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}
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/* ***************************************************** */
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static int choose_adapter_callback(struct win_adapter_info *adapter, void *userdata) {
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struct tuntap_dev *device = (struct tuntap_dev *)userdata;
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if(device->device_name) {
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/* A device name filter was set, name must match */
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if(strcmp(device->device_name, adapter->adapterid) &&
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strcmp(device->device_name, adapter->adaptername)) {
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/* Not found, continue */
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return(1);
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}
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} /* otherwise just pick the first available adapter */
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/* Adapter found, break */
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device->device_handle = adapter->handle;
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device->device_name = _strdup(adapter->adapterid);
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device->ifName = _strdup(adapter->adaptername);
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return(0);
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}
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/* ***************************************************** */
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int open_wintap(struct tuntap_dev *device,
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const char * devname,
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const char * address_mode, /* "static" or "dhcp" */
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char *device_ip,
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char *device_mask,
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const char *device_mac,
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int mtu) {
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char cmd[256];
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int len;
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ULONG status = TRUE;
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memset(device, 0, sizeof(struct tuntap_dev));
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device->device_handle = INVALID_HANDLE_VALUE;
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device->device_name = devname[0] ? devname : NULL;
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device->ifName = NULL;
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device->ip_addr = inet_addr(device_ip);
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iterate_win_network_adapters(choose_adapter_callback, device);
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if(device->device_handle == INVALID_HANDLE_VALUE) {
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if(!devname)
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printf("No Windows tap devices found, did you run tapinstall.exe?\n");
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else
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printf("Cannot find tap device \"%s\"\n", devname);
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exit(0);
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}
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/* ************************************** */
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if(!device->device_name)
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device->device_name = _strdup(adapterid);
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if(!device->ifName)
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device->ifName = _strdup(adaptername);
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/* Try to open the corresponding tap device->device_name */
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if(device->device_handle == INVALID_HANDLE_VALUE) {
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_snprintf(tapname, sizeof(tapname), USERMODEDEVICEDIR "%s" TAPSUFFIX, device->device_name);
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device->device_handle = CreateFile(tapname, GENERIC_WRITE | GENERIC_READ, 0, 0,
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OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, 0);
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}
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if(device->device_handle == INVALID_HANDLE_VALUE) {
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printf("%s (%s) is not a usable Windows tap device\n", device->device_name, device->ifName);
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exit(-1);
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}
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/* Get MAC address from tap device->device_name */
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if(!DeviceIoControl(device->device_handle, TAP_IOCTL_GET_MAC,
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@ -63,5 +63,6 @@
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#define TAP_COMPONENT_ID "tap0801"
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extern void initWin32();
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extern void win_print_available_adapters();
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#endif
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