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113 lines
3.4 KiB
C
113 lines
3.4 KiB
C
/*
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* Copyright (c)2018-2019 Rick V. All rights reserved.
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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*------------------------------------------------------------------------------
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* Shared object loaded by lokinet installer to properly detect the presence
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* of the TAP v9 adapter
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* -rick
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*/
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#include <sys/types.h>
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#include <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/* Windows registry crap */
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#define MAX_KEY_LENGTH 255
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#define MAX_VALUE_NAME 16383
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#define ETHER_ADDR_LEN 6
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/* checks if TAP-Win32 v9 is already installed */
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BOOL
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reg_query_helper()
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{
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HKEY adapters, adapter;
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DWORD i, ret, len;
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char *deviceid = NULL;
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DWORD sub_keys = 0;
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BOOL found = FALSE;
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ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE,
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TEXT("SYSTEM\\CurrentControlSet\\Control\\Class\\{"
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"4D36E972-E325-11CE-BFC1-08002BE10318}"),
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0, KEY_READ, &adapters);
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if(ret != ERROR_SUCCESS)
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return FALSE;
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ret = RegQueryInfoKey(adapters, NULL, NULL, NULL, &sub_keys, NULL, NULL, NULL,
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NULL, NULL, NULL, NULL);
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if(ret != ERROR_SUCCESS)
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return FALSE;
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if(sub_keys <= 0)
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return FALSE;
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/* Walk througt all adapters */
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for(i = 0; i < sub_keys; i++)
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{
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char new_key[MAX_KEY_LENGTH];
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char data[256];
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TCHAR key[MAX_KEY_LENGTH];
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DWORD keylen = MAX_KEY_LENGTH;
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/* Get the adapter key name */
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ret = RegEnumKeyEx(adapters, i, key, &keylen, NULL, NULL, NULL, NULL);
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if(ret != ERROR_SUCCESS)
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continue;
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/* Append it to NETWORK_ADAPTERS and open it */
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snprintf(new_key, sizeof new_key, "%s\\%s",
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"SYSTEM\\CurrentControlSet\\Control\\Class\\{4D36E972-E325-11CE-"
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"BFC1-08002BE10318}",
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key);
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ret =
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RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT(new_key), 0, KEY_READ, &adapter);
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if(ret != ERROR_SUCCESS)
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continue;
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/* Check its values */
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len = sizeof data;
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ret =
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RegQueryValueEx(adapter, "ComponentId", NULL, NULL, (LPBYTE)data, &len);
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if(ret != ERROR_SUCCESS)
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{
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/* This value doesn't exist in this adaptater tree */
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goto clean;
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}
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/* If its a tap adapter, its all good */
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/* We only support TAP 9.x, TAP 8.x users must upgrade. */
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if(strncmp(data, "tap0901", 7) == 0)
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{
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DWORD type;
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len = sizeof data;
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ret = RegQueryValueEx(adapter, "NetCfgInstanceId", NULL, &type,
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(LPBYTE)data, &len);
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if(ret != ERROR_SUCCESS)
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goto clean;
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found = TRUE;
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break;
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}
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clean:
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RegCloseKey(adapter);
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}
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RegCloseKey(adapters);
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return found;
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}
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