Hudsuckr windows proxy configuration tool

/* * Copyright 2007 ThoughtWorks, Inc. * *  Licensed under the Apache License, Version 2.0 (the "License"); *  you may not use this file except in compliance with the License. *  You may obtain a copy of the License at * *      http://www.apache.org/licenses/LICENSE-2.0 * *  Unless required by applicable law or agreed to in writing, software *  distributed under the License is distributed on an "AS IS" BASIS, *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *  See the License for the specific language governing permissions and *  limitations under the License. * */// Hudsuckr Windows Proxy Configuration Tool// "You know, for kids!"#define _WIN32_WINNT 0x0500// Change this to the appropriate value to target other versions of Windows.#include <stdio.h>#include <tchar.h>#include <windows.h>#include <wininet.h>#include <ras.h>#pragma comment( lib, "wininet" )#pragma comment( lib, "rasapi32" )//// Options used in INTERNET_PER_CONN_OPTON struct//#define INTERNET_PER_CONN_FLAGS                         1//#define INTERNET_PER_CONN_PROXY_SERVER                  2//#define INTERNET_PER_CONN_PROXY_BYPASS                  3//#define INTERNET_PER_CONN_AUTOCONFIG_URL                4//#define INTERNET_PER_CONN_AUTODISCOVERY_FLAGS           5//etc.//// PER_CONN_FLAGS//#define PROXY_TYPE_DIRECT                               0x00000001   // direct to net//#define PROXY_TYPE_PROXY                                0x00000002   // via named proxy//#define PROXY_TYPE_AUTO_PROXY_URL                       0x00000004   // autoproxy URL//#define PROXY_TYPE_AUTO_DETECT                          0x00000008   // use autoproxy detection// Figure out which Dial-Up or VPN connection is active; in a normal LAN connection, this should// return NULLLPTSTR FindActiveConnection(){    DWORD dwCb = sizeof(RASCONN);    DWORD dwErr = ERROR_SUCCESS;    DWORD dwRetries = 5;    DWORD dwConnections = 0;    RASCONN* lpRasConn = NULL;    RASCONNSTATUS rasconnstatus;    rasconnstatus.dwSize = sizeof(RASCONNSTATUS);    //    // Loop through in case the information from RAS changes between calls.    //    while (dwRetries--)    {        //        // If the memory is allocated, free it.        //        if (NULL != lpRasConn)        {            HeapFree(GetProcessHeap(), 0, lpRasConn);            lpRasConn = NULL;        }        //        // Allocate the size needed for the RAS structure.        //        lpRasConn = (RASCONN*)HeapAlloc(GetProcessHeap(), 0, dwCb);        if (NULL == lpRasConn)        {            dwErr = ERROR_NOT_ENOUGH_MEMORY;            break;        }        //        // Set the structure size for version checking purposes.        //        lpRasConn->dwSize = sizeof(RASCONN);        //        // Call the RAS API then exit the loop if we are successful or an unknown        // error occurs.        //        dwErr = RasEnumConnections(                    lpRasConn,                    &dwCb,                    &dwConnections);        if (ERROR_INSUFFICIENT_BUFFER != dwErr)        {            break;        }    }    //    // In the success case, print the names of the connections.    //    if (ERROR_SUCCESS == dwErr)    {        DWORD i;        for (i = 0; i < dwConnections; i++)        {            RasGetConnectStatus(lpRasConn[i].hrasconn, &rasconnstatus);            if (rasconnstatus.rasconnstate == RASCS_Connected)            {                return lpRasConn[i].szEntryName;            }        }    }    return NULL; // Couldn't find an active dial-up/VPN connection; return NULL}int QueryOptions(LPTSTR szActiveConnection){    _tprintf(L"ACTIVE_CONNECTION=%s/n", (szActiveConnection == NULL ? L"": szActiveConnection));    const int optionCount = 5;    INTERNET_PER_CONN_OPTION_LIST    List;    INTERNET_PER_CONN_OPTION         Option[optionCount];    unsigned long                    nSize = sizeof(INTERNET_PER_CONN_OPTION_LIST);    Option[0].dwOption = 1;    for (int i = 1; i < optionCount; i++) {        Option[i].dwOption = i;    }    List.dwSize = sizeof(INTERNET_PER_CONN_OPTION_LIST);    List.pszConnection = szActiveConnection;    List.dwOptionCount = optionCount;    List.dwOptionError = 0;    List.pOptions = Option;    if(!InternetQueryOption(NULL, INTERNET_OPTION_PER_CONNECTION_OPTION, &List, &nSize)) {        DWORD lastError = GetLastError();        _tprintf(L"InternetQueryOption failed! (%d)/n", lastError);        return lastError;    }    _tprintf(L"PROXY_TYPE_DIRECT=");    if((Option[INTERNET_PER_CONN_FLAGS].Value.dwValue & PROXY_TYPE_DIRECT) == PROXY_TYPE_DIRECT) {        _tprintf(L"true/n");    } else {        _tprintf(L"false/n");    }    _tprintf(L"PROXY_TYPE_PROXY=");    if((Option[INTERNET_PER_CONN_FLAGS].Value.dwValue & PROXY_TYPE_PROXY) == PROXY_TYPE_PROXY) {        _tprintf(L"true/n");    } else {        _tprintf(L"false/n");    }    _tprintf(L"PROXY_TYPE_AUTO_PROXY_URL=");    if((Option[INTERNET_PER_CONN_FLAGS].Value.dwValue & PROXY_TYPE_AUTO_PROXY_URL) == PROXY_TYPE_AUTO_PROXY_URL) {        _tprintf(L"true/n");    } else {        _tprintf(L"false/n");    }    _tprintf(L"PROXY_TYPE_AUTO_DETECT=");    if((Option[INTERNET_PER_CONN_FLAGS].Value.dwValue & PROXY_TYPE_AUTO_DETECT) == PROXY_TYPE_AUTO_DETECT) {        _tprintf(L"true/n");    } else {        _tprintf(L"false/n");    }    _tprintf(L"INTERNET_PER_CONN_PROXY_SERVER=");    if(Option[INTERNET_PER_CONN_PROXY_SERVER].Value.pszValue != NULL) {        _tprintf(L"%s/n", Option[INTERNET_PER_CONN_PROXY_SERVER].Value.pszValue);    } else {        _tprintf(L"/n");    }        _tprintf(L"INTERNET_PER_CONN_PROXY_BYPASS=");    if(Option[INTERNET_PER_CONN_PROXY_BYPASS].Value.pszValue != NULL) {        _tprintf(L"%s/n", Option[INTERNET_PER_CONN_PROXY_BYPASS].Value.pszValue);    } else {        _tprintf(L"/n");    }        _tprintf(L"INTERNET_PER_CONN_AUTOCONFIG_URL=");    if(Option[INTERNET_PER_CONN_AUTOCONFIG_URL].Value.pszValue != NULL) {        _tprintf(L"%s/n", Option[INTERNET_PER_CONN_AUTOCONFIG_URL].Value.pszValue);    } else {        _tprintf(L"/n");    }return 0;}int _tmain(int argc, _TCHAR* argv[]){    if (argc < 2) return QueryOptions(FindActiveConnection());    if (argc != 9) {        printf("Hudsuckr Windows Proxy Configuration Tool: /"You know, for kids!/"/n/n"            "Windows manages Internet proxy connection information in the registry;/n"            "each Internet /"connection/" can have its own separate proxy/n"            "configuration.  These settings correspond to settings in the /"Internet/n"            "Options/" Control Panel, under the /"Connections/" tab./n/n"            "Run /"hudsuckr/" without arguments to print out the current proxy/n"            "configuration details.  We print out the name of the current active/n"            "connection, the four connection flags (DIRECT, PROXY, AUTO_PROXY_URL,/n"            "AUTO_DETECT), and three strings: PROXY_SERVER, PROXY_BYPASS, and/n"            "AUTOCONFIG_URL. The seven settings are described in MS documentation/n"            "available here: http://msdn2.microsoft.com/en-us/library/aa385145.aspx/n/n"            "Run /"hudsuckr/" with exactly eight arguments to set the proxy/n"            "configuration, like this:/n"            "  hudsuckr /"/" true true true true /"localhost:4444/" /"<local>/" /"file://c:/proxy.pac/"/n/n"            "Specify the name of the connection first (or use the LAN settings by/n"            "specifying the blank string /"/"), then set the four flags using /"true/"/n"            "and /"false/", then the proxy server (with a colon to specify the port),/n"            "the list of servers to bypass delimited by semi-colons (with /"<local>/"/n"            "as a special string that bypasses local addresses), and finally the/n"            "URL to a proxy PAC autoconfiguration file.  Use /"/" to leave string/n"            "settings blank/empty./n/n"            "If you're still confused about the flags, look at the proxy settings/n"            "in the /"Internet Options/" Control Panel. See how you can check those/n"            "checkboxes independently of one another? The flags correspond to those/n"            "checkboxes.  If AUTO_DETECT is true, IE will try to use WPAD; if/n"            "successful, WPAD will override the specified AUTOCONFIG_URL. If an/n"            "AUTOCONFIG_URL is detected (by AUTO_DETECT) or specified directly/n"            "(AUTO_PROXY_URL is enabled), IE will use the autoconfig script as a/n"            "proxy PAC file.  If no AUTOCONFIG_URL was specified or detected, IE/n"            "will attempt to use the server specified in PROXY_SERVER if the PROXY/n"            "flag is enabled; it will bypass the proxy for the list of servers/n"            "specified in PROXY_BYPASS. Finally, if PROXY, AUTO_DETECT and/n"            "AUTO_PROXY_URL are all set to false, IE will attempt to contact the/n"            "web server directly.  Note that the DIRECT flag always appears to be/n"            "true, even if the PROXY flag is true; we recommend you leave it that/n"            "way, too."            );        return -1;    }    BOOL bDirect, bProxy, bAutoProxyUrl, bAutoDetect;    LPTSTR szActiveConnection, szProxyServer, szProxyBypass, szAutoConfigUrl;    int i = 1;    szActiveConnection = argv[i++];    if (_tcslen(szActiveConnection) == 0) {        szActiveConnection = NULL;    }    bDirect = (_tcsicmp(argv[i++], L"true") == 0);    bProxy = (_tcsicmp(argv[i++], L"true") == 0);    bAutoProxyUrl = (_tcsicmp(argv[i++], L"true") == 0);    bAutoDetect = (_tcsicmp(argv[i++], L"true") == 0);        DWORD dwConnFlags;    dwConnFlags = bDirect + (bProxy << 1) + (bAutoProxyUrl << 2) + (bAutoDetect << 3);        szProxyServer = argv[i++];    if (_tcslen(szProxyServer) == 0) {        szProxyServer = NULL;    }    szProxyBypass = argv[i++];    if (_tcslen(szProxyBypass) == 0) {        szProxyBypass = NULL;    }    szAutoConfigUrl = argv[i++];    if (_tcslen(szAutoConfigUrl) == 0) {        szAutoConfigUrl = NULL;    }    const int optionCount = 4;    INTERNET_PER_CONN_OPTION_LIST    List;    INTERNET_PER_CONN_OPTION         Option[optionCount];    unsigned long                    nSize = sizeof(INTERNET_PER_CONN_OPTION_LIST);    i = 0;    Option[i].dwOption = INTERNET_PER_CONN_FLAGS;    Option[i++].Value.dwValue = dwConnFlags;    Option[i].dwOption = INTERNET_PER_CONN_PROXY_SERVER;    Option[i++].Value.pszValue = szProxyServer;    Option[i].dwOption = INTERNET_PER_CONN_PROXY_BYPASS;    Option[i++].Value.pszValue = szProxyBypass;    Option[i].dwOption = INTERNET_PER_CONN_AUTOCONFIG_URL;    Option[i++].Value.pszValue = szAutoConfigUrl;    List.dwSize = sizeof(INTERNET_PER_CONN_OPTION_LIST);    List.pszConnection = szActiveConnection;    List.dwOptionCount = optionCount;    List.dwOptionError = 0;    List.pOptions = Option;        if(!InternetSetOption(NULL, INTERNET_OPTION_PER_CONNECTION_OPTION, &List, nSize)) {        DWORD lastError = GetLastError();        printf("InternetSetOption failed! (%d)/n", lastError);        return lastError;    }    if(!InternetSetOption(NULL, INTERNET_OPTION_SETTINGS_CHANGED, NULL, 0)) {        DWORD lastError = GetLastError();        printf("InternetSetOption failed! (%d)/n", lastError);        return lastError;    }    return QueryOptions(szActiveConnection);}