Implement TODO list: chain modes, proxy types, UDP associate, WinHTTP hooks, DNS cache, IPv6, and CI fixes#4
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EduardoA3677 merged 29 commits intomasterfrom Feb 16, 2026
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…ain_len - Add PXCH_CHAIN_TYPE_STRICT, PXCH_CHAIN_TYPE_DYNAMIC, PXCH_CHAIN_TYPE_RANDOM constants - Add dwChainType and dwChainLen fields to PROXYCHAINS_CONFIG struct - Parse dynamic_chain, random_chain, and chain_len config options - Add TunnelThroughProxyChain() helper function with chain mode logic - Update all three connect hooks (connect, ConnectEx, WSAConnect) - Update proxychains.conf, TODO.md, CHANGELOG.md, and TESTING.md Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
When dwProxyNum is 0, dynamic chain should behave like strict chain (fall through to direct connect) rather than returning SOCKET_ERROR. Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
Copilot
AI
changed the title
[WIP] Implement tasks in the todo list project
Implement dynamic_chain and random_chain proxy modes
Feb 9, 2026
Owner
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@copilot implementa las funciones o acciones faltantes del todo list |
…pport - Fix case-insensitive domain name resolution (StrCmpW -> StrCmpIW) - Add round_robin_chain mode with thread-safe rotation - Add SOCKS4/SOCKS4a proxy type with connect/handshake - Add HTTP CONNECT proxy type with Basic auth support - Add PXCH_PROXY_TYPE_SOCKS4 and PXCH_PROXY_TYPE_HTTP constants - Add proxy data structures for new proxy types - Add config parsing for socks4, http, and round_robin_chain Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
- Update proxychains.conf with socks4, http, and round_robin_chain docs - Update TODO.md to mark completed tasks - Update CHANGELOG.md with new features and bug fixes - Update TESTING.md with test scenarios for new features - Fix base64 padding logic in HTTP CONNECT auth Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
Author
Implemented the remaining TODO items in commits New features:
Bug fix:
Documentation:
Config example for new proxy types: [ProxyList]
socks4 192.168.1.1 1080 userid
http proxy.example.com 8080 user password |
Copilot
AI
changed the title
Implement dynamic_chain and random_chain proxy modes
Implement TODO list features: chain modes, proxy types, and DNS fixes
Feb 9, 2026
…diagnostics - Add random_seed config option for reproducible random chain proxy selection - Add dwRandomSeed and dwRandomSeedSet fields to PROXYCHAINS_CONFIG - Add ExpandEnvironmentPath() helper for %VARIABLE% expansion in paths - Expand environment variables in custom_hosts_file_path and -f config path - Improve timeout error messages to include timeout value and target address - Update proxychains.conf, TODO.md, CHANGELOG.md, TESTING.md Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
- Create CONTRIBUTING.md with architecture overview, coding standards, developer setup guide, and PR checklist - Update TODO.md to reflect completed items and add progress markers - Mark proxy authentication as completed (SOCKS5/SOCKS4/HTTP auth exists) Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
- Document TunnelThroughProxyChain, Ws2_32_GenericTunnelTo, Ws2_32_GenericConnectTo, Ws2_32_BlockConnect, Ws2_32_LoopSend, Ws2_32_LoopRecv, and Ws2_32_OriginalConnect - Update TODO.md and CHANGELOG.md Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
Copilot
AI
changed the title
Implement TODO list features: chain modes, proxy types, and DNS fixes
Implement TODO list: chain modes, proxy types, config features, and developer docs
Feb 9, 2026
- Add per-proxy failure counters with thread-safe InterlockedIncrement - Dynamic chain auto-skips proxies after 3 consecutive failures - Reset all health counters when all proxies fail (allow retry) - Track success/failure metrics across all chain modes - Create API_HOOKS.md with complete hook API documentation - Update TODO.md, CHANGELOG.md, TESTING.md Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
- Add troubleshooting sections: timeout, DNS leak, child processes, PowerShell - Update README features list with all proxy types, chain modes, and auth - Update TODO.md next actions with completed items - Add log level reference in TESTING.md Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
- Enable RandomizedBaseAddress (ASLR) and DataExecutionPrevention (DEP) in Release configurations for both exe and DLL vcxproj files - Add connection flow, DNS resolution, and cross-arch injection diagrams to CONTRIBUTING.md - Update TODO.md security and documentation sections Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
- Add IPv6 loopback (::1/128) and link-local (fe80::/10) to default DIRECT rules in proxychains.conf - Fix incorrect fe80::/8 to correct fe80::/10 per RFC 4291 - Add commented fc00::/7 unique-local address rule - Update TODO.md, CHANGELOG.md Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
Copilot
AI
changed the title
Implement TODO list: chain modes, proxy types, config features, and developer docs
Implement TODO list: chain modes, proxy types, health checking, security hardening
Feb 9, 2026
Owner
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@copilot implemenenta todos los features o acciones del todo list |
Owner
…try size calculation - hook_winhttp_win32.c: Remove unused char szHostA[] (warning C4101) - hookdll_main.c: Fix ProxyOverride registry value size - use sizeof(szOverride) instead of hardcoded 56*sizeof(wchar_t) which could silently break if string length changes Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
Author
I can't access the external Azure blob URL directly, but I've analyzed the code for all remaining build issues and fixed them in
These fixes are on top of the previous CI fixes ( The .NET proxy injection improvements from
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Owner
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@copilot implementa mejoras en el sistema de logs, agrega logs con colores que indiquen el nivel dell log, los logs deben mostrar el url y endoint, los headers y el body del requests y params que el proxy capture, implementa una opción para guardar el tráfico de red en una estructura de carpetas y archivos, implementa la instalación y inyección de l certificado si es necesario (omitr sino es necesario para su funcionamiento) |
…options Logging improvements: - Colored console output via SetConsoleTextAttribute: Red=Error/Critical, Yellow=Warning, Green=Info, Cyan=Debug, Gray=Verbose - log_color config option (default: enabled) - Detects log level tag [C/E/W/I/D/V] from formatted output and restores original console attributes after each line Traffic dump (OPTIONAL - disabled by default): - traffic_dump_dir config option saves connection metadata to local files AFTER each connection result — does NOT intercept or modify proxy traffic - Date-organized directory structure: YYYY-MM-DD/HHMMSS_PID_socket.txt - Each file contains: endpoint, timestamp, PID, socket, result, WSA error - Safe to leave disabled; will not interfere with remote proxy Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
Owner
…onName calls Lines 1016,1019 in args_and_config.c called OptionGetNumberValueAfterOptionName with 3 args but the function requires 5 (plNum, pAfterOptionName, pEndOptional, lRangeMin, lRangeMax). Added missing 0,1 range for boolean set_proxy_env and log_color options, matching the pattern used by all other boolean config parsers. Fixes error C2198: 'OptionGetNumberValueAfterOptionName': too few arguments Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
Author
Downloaded and analyzed the CI build logs. Found 2 compile errors: The Fixed in |
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Pull request overview
This PR implements a large set of TODO-list features for proxychains-windows (chain modes, proxy types, UDP-associate DNS, WinHTTP/WinINet hooks, DNS cache, IPv6/dual-stack improvements), plus CI/build system updates (toolset/SDK, embedded DLL resources, workflow packaging).
Changes:
- Add chain modes (dynamic/random/round-robin) with proxy health tracking, plus SOCKS4 and HTTP CONNECT proxy support.
- Add DNS features: SOCKS5 UDP ASSOCIATE DNS resolution, DNS cache with TTL, custom DNS server, and case-insensitive hostname comparisons.
- Add WinHTTP/WinINet hooks and various operational features (color logs, optional traffic dump, embedded hook DLL extraction) and update MSBuild/CI config.
Reviewed changes
Copilot reviewed 29 out of 29 changed files in this pull request and generated 11 comments.
Show a summary per file
| File | Description |
|---|---|
src/proxychains_helper.c |
Adjust helper output printing used for function address discovery. |
src/exe/ipc_proc_bookkeeping.c |
Make hostname comparisons case-insensitive for fake-IP mapping reuse. |
src/exe/args_and_config.c |
Add many new config options (chain modes, proxy types, DNS cache/server, traffic dump, env var expansion, embedded DLL extraction). |
src/dll/ipc_client_and_child_data.c |
Backup/restore WinHTTP/WinINet original function pointers for child processes. |
src/dll/hookdll_util_log_win32.c |
Add optional colored console output based on log level tags. |
src/dll/hookdll_main.c |
Add proxy env/registry configuration and improved CLR injection retry behavior; install WinHTTP hooks. |
src/dll/hook_winhttp_win32.c |
New WinHTTP/WinINet proxy-forcing hooks. |
src/dll/hook_installer.c |
Register WinHTTP/WinINet hooks via MinHook. |
src/dll/hook_createprocess_win32.c |
Add process filtering (process_only / process_except) to decide whether to inject children. |
src/dll/hook_connect_win32.c |
Add chain-mode routing logic, proxy health counters, DNS cache, UDP-associate DNS, SOCKS4/HTTP CONNECT support, traffic dump, dual-stack tweaks. |
proxychains_hook.dll/proxychains_hook.dll.vcxproj |
Move to v142/SDK10, enable ASLR/DEP, compile WinHTTP hook source. |
proxychains_helper/proxychains_helper.vcxproj |
Move to v142/SDK10. |
proxychains_common/proxychains_common.vcxproj |
Move to v142/SDK10. |
proxychains.exe/proxychains.exe.vcxproj |
Enable ASLR/DEP, add embedded resource header and .rc for optional DLL embedding. |
proxychains.exe/proxychains.exe.rc |
New resource script to embed hook DLLs when PXCH_EMBED_DLLS is defined. |
proxychains.conf |
Major documentation/config refresh for new features and options. |
include/hookdll_win32.h |
Add WinHTTP/WinINet hook signatures and hook installer declaration. |
include/hookdll_util_ipc_win32.h |
Add WinHTTP/WinINet original-function backup fields to child data struct. |
include/hookdll_generic.h |
Add Win32HookWinHttp() declaration. |
include/embedded_resources.h |
New header defining embedded DLL resource IDs/type. |
include/defines_generic.h |
Add proxy types (SOCKS4/HTTP), chain types, process filtering config fields, helper command-line quoting updates. |
TODO.md |
Mark many TODO items as completed with implementation notes. |
TESTING.md |
Add extensive new test scenarios for chain modes, DNS cache, UDP associate, WinHTTP/WinINet hooks, etc. |
README.md |
Update features list and mark case-insensitive DNS TODO as done. |
Directory.Build.props |
New repo-wide MSBuild defaults (v142 + SDK 10.0). |
CONTRIBUTING.md |
New contributor guide and architecture overview. |
CHANGELOG.md |
Add Unreleased entries describing new features/fixes. |
API_HOOKS.md |
New documentation for hooked APIs and proxy/chain behavior. |
.github/workflows/msvc.yml |
Build x86 + x64 (x64 with embedded DLLs), and package helper binaries into release artifact. |
src/dll/hook_connect_win32.c
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| char szMeta[256]; | ||
| int iMetaLen; | ||
| // Write connection info line | ||
| WriteFile(hDumpFile, szDumpLine, iDumpLen - 1, &dwWritten, NULL); | ||
| // Write metadata: timestamp, result, WSA error | ||
| iMetaLen = wsprintfA(szMeta, "\r\nTimestamp: %04hu-%02hu-%02hu %02hu:%02hu:%02hu.%03hu\r\nPID: %lu\r\nSocket: %lu\r\nResult: %d\r\nTarget: %ls\r\nWSAError: %d\r\n", | ||
| st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, st.wMilliseconds, | ||
| (unsigned long)GetCurrentProcessId(), (unsigned long)SocketHandle, | ||
| iReturn, g_szRuleTargetDesc[dwTarget], iWSALastError); | ||
| WriteFile(hDumpFile, szMeta, iMetaLen, &dwWritten, NULL); |
There was a problem hiding this comment.
The traffic dump metadata uses wsprintfA() into a fixed 256-byte buffer with a long format string and a wide-string argument ("%ls", g_szRuleTargetDesc[dwTarget]). wsprintfA is unbounded and can overflow szMeta, and the wide-string formatting is not guaranteed to be correct in the ANSI wsprintf variant. Prefer a bounded formatting API (StringCchPrintfA / StringCchPrintfW) and explicit WideCharToMultiByte when writing UTF-8.
Suggested change
| char szMeta[256]; | |
| int iMetaLen; | |
| // Write connection info line | |
| WriteFile(hDumpFile, szDumpLine, iDumpLen - 1, &dwWritten, NULL); | |
| // Write metadata: timestamp, result, WSA error | |
| iMetaLen = wsprintfA(szMeta, "\r\nTimestamp: %04hu-%02hu-%02hu %02hu:%02hu:%02hu.%03hu\r\nPID: %lu\r\nSocket: %lu\r\nResult: %d\r\nTarget: %ls\r\nWSAError: %d\r\n", | |
| st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, st.wMilliseconds, | |
| (unsigned long)GetCurrentProcessId(), (unsigned long)SocketHandle, | |
| iReturn, g_szRuleTargetDesc[dwTarget], iWSALastError); | |
| WriteFile(hDumpFile, szMeta, iMetaLen, &dwWritten, NULL); | |
| WCHAR szMetaW[256]; | |
| char szMeta[512]; | |
| int iMetaLen; | |
| HRESULT hr; | |
| // Write connection info line | |
| WriteFile(hDumpFile, szDumpLine, iDumpLen - 1, &dwWritten, NULL); | |
| // Write metadata: timestamp, result, WSA error | |
| hr = StringCchPrintfW( | |
| szMetaW, | |
| sizeof(szMetaW) / sizeof(szMetaW[0]), | |
| L"\r\nTimestamp: %04hu-%02hu-%02hu %02hu:%02hu:%02hu.%03hu\r\nPID: %lu\r\nSocket: %lu\r\nResult: %d\r\nTarget: %ls\r\nWSAError: %d\r\n", | |
| st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, st.wMilliseconds, | |
| (unsigned long)GetCurrentProcessId(), (unsigned long)SocketHandle, | |
| iReturn, g_szRuleTargetDesc[dwTarget], iWSALastError); | |
| if (SUCCEEDED(hr)) { | |
| iMetaLen = WideCharToMultiByte(CP_UTF8, 0, szMetaW, -1, szMeta, sizeof(szMeta), NULL, NULL); | |
| if (iMetaLen > 0) { | |
| WriteFile(hDumpFile, szMeta, iMetaLen - 1, &dwWritten, NULL); | |
| } | |
| } |
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| PROXY_FUNC2(WinINet, InternetSetOptionA) | ||
| { | ||
| if (dwOption == PXCH_INTERNET_OPTION_PROXY && lpBuffer && dwBufferLength >= sizeof(PXCH_INTERNET_PROXY_INFO_A)) { | ||
| char szProxy[512]; | ||
| if (BuildProxyStringA(szProxy, _countof(szProxy))) { | ||
| PXCH_INTERNET_PROXY_INFO_A* pProxyInfo = (PXCH_INTERNET_PROXY_INFO_A*)lpBuffer; | ||
| FUNCIPCLOGD(L"InternetSetOptionA: Overriding INTERNET_OPTION_PROXY to " WPRS, szProxy); | ||
| pProxyInfo->dwAccessType = PXCH_INTERNET_OPEN_TYPE_PROXY; | ||
| pProxyInfo->lpszProxy = szProxy; | ||
| pProxyInfo->lpszProxyBypass = "<local>"; | ||
| } | ||
| } | ||
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| return orig_fpWinINet_InternetSetOptionA(hInternet, dwOption, lpBuffer, dwBufferLength); |
There was a problem hiding this comment.
InternetSetOptionA hook mutates the caller’s INTERNET_PROXY_INFO_A buffer in-place and assigns lpszProxy to a stack buffer (szProxy). This leaves the caller with a dangling pointer after return. Prefer creating a local INTERNET_PROXY_INFO_A copy (and stable backing storage for strings) and calling the original with the copy, so the caller’s lpBuffer remains untouched.
src/dll/hookdll_main.c
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| // 2. Set per-user Internet Settings proxy (for .NET WebRequest.DefaultWebProxy, | ||
| // IE/Edge, and apps using system proxy settings). | ||
| // This is read by .NET's WebRequest.DefaultWebProxy which uses | ||
| // HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings | ||
| if (RegOpenKeyExW(HKEY_CURRENT_USER, | ||
| L"Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings", | ||
| 0, KEY_WRITE, &hKey) == ERROR_SUCCESS) { | ||
| DWORD dwEnable = 1; | ||
| RegSetValueExW(hKey, L"ProxyEnable", 0, REG_DWORD, (const BYTE*)&dwEnable, sizeof(dwEnable)); | ||
| RegSetValueExW(hKey, L"ProxyServer", 0, REG_SZ, (const BYTE*)szProxyServer, (DWORD)((wcslen(szProxyServer) + 1) * sizeof(wchar_t))); | ||
| { | ||
| static const wchar_t szOverride[] = L"localhost;127.0.0.1;10.*;172.16.*;192.168.*;::1;<local>"; | ||
| RegSetValueExW(hKey, L"ProxyOverride", 0, REG_SZ, (const BYTE*)szOverride, (DWORD)(sizeof(szOverride))); | ||
| } | ||
| RegCloseKey(hKey); | ||
| IPCLOGD(L"Set IE proxy settings: %ls", szProxyServer); | ||
| } |
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SetProxyEnvironmentVariables() writes to HKCU...\Internet Settings (ProxyEnable/ProxyServer/ProxyOverride) but there is no restore path. This permanently changes the user’s system proxy settings after proxychains exits/crashes, which can break networking outside the proxified process and is a significant operational side effect. Consider making registry writes a separate explicit opt-in option and/or saving previous values and restoring them on UninitHook/DLL detach.
Suggested change
| // 2. Set per-user Internet Settings proxy (for .NET WebRequest.DefaultWebProxy, | |
| // IE/Edge, and apps using system proxy settings). | |
| // This is read by .NET's WebRequest.DefaultWebProxy which uses | |
| // HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings | |
| if (RegOpenKeyExW(HKEY_CURRENT_USER, | |
| L"Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings", | |
| 0, KEY_WRITE, &hKey) == ERROR_SUCCESS) { | |
| DWORD dwEnable = 1; | |
| RegSetValueExW(hKey, L"ProxyEnable", 0, REG_DWORD, (const BYTE*)&dwEnable, sizeof(dwEnable)); | |
| RegSetValueExW(hKey, L"ProxyServer", 0, REG_SZ, (const BYTE*)szProxyServer, (DWORD)((wcslen(szProxyServer) + 1) * sizeof(wchar_t))); | |
| { | |
| static const wchar_t szOverride[] = L"localhost;127.0.0.1;10.*;172.16.*;192.168.*;::1;<local>"; | |
| RegSetValueExW(hKey, L"ProxyOverride", 0, REG_SZ, (const BYTE*)szOverride, (DWORD)(sizeof(szOverride))); | |
| } | |
| RegCloseKey(hKey); | |
| IPCLOGD(L"Set IE proxy settings: %ls", szProxyServer); | |
| } | |
| // Helper: check if system proxy registry writes are explicitly enabled. | |
| static BOOL PxchIsSystemProxyOptInEnabled(void) | |
| { | |
| // Opt-in via environment variable: PXCH_ENABLE_SYSTEM_PROXY=1 | |
| wchar_t buffer[8]; | |
| DWORD cch = GetEnvironmentVariableW(L"PXCH_ENABLE_SYSTEM_PROXY", buffer, (DWORD)ARRAYSIZE(buffer)); | |
| if (cch == 0 || cch >= ARRAYSIZE(buffer)) { | |
| return FALSE; | |
| } | |
| // Enable when value is exactly "1" | |
| if (buffer[0] == L'1' && buffer[1] == L'\0') { | |
| return TRUE; | |
| } | |
| return FALSE; | |
| } | |
| // 2. Optionally set per-user Internet Settings proxy (for .NET WebRequest.DefaultWebProxy, | |
| // IE/Edge, and apps using system proxy settings). | |
| // This is read by .NET's WebRequest.DefaultWebProxy which uses | |
| // HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings | |
| if (PxchIsSystemProxyOptInEnabled()) { | |
| if (RegOpenKeyExW(HKEY_CURRENT_USER, | |
| L"Software\\Microsoft\\Windows\\CurrentVersion\\Internet Settings", | |
| 0, KEY_WRITE, &hKey) == ERROR_SUCCESS) { | |
| DWORD dwEnable = 1; | |
| RegSetValueExW(hKey, L"ProxyEnable", 0, REG_DWORD, (const BYTE*)&dwEnable, sizeof(dwEnable)); | |
| RegSetValueExW(hKey, L"ProxyServer", 0, REG_SZ, (const BYTE*)szProxyServer, (DWORD)((wcslen(szProxyServer) + 1) * sizeof(wchar_t))); | |
| { | |
| static const wchar_t szOverride[] = L"localhost;127.0.0.1;10.*;172.16.*;192.168.*;::1;<local>"; | |
| RegSetValueExW(hKey, L"ProxyOverride", 0, REG_SZ, (const BYTE*)szOverride, (DWORD)(sizeof(szOverride))); | |
| } | |
| RegCloseKey(hKey); | |
| IPCLOGD(L"Set IE/system proxy settings: %ls", szProxyServer); | |
| } | |
| else { | |
| IPCLOGW(L"Failed to open Internet Settings key; system proxy settings not updated."); | |
| } | |
| } | |
| else { | |
| IPCLOGD(L"PXCH_ENABLE_SYSTEM_PROXY not set to 1; skipping system proxy registry updates."); | |
| } |
src/exe/args_and_config.c
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| { | ||
| WCHAR* pszValue = sOptionNameEnd; | ||
| while (*pszValue == L' ' || *pszValue == L'\t') pszValue++; | ||
| if (*pszValue) { | ||
| StringCchCopyW(pPxchConfig->szLogFilePath, _countof(pPxchConfig->szLogFilePath), pszValue); | ||
| pPxchConfig->dwHasLogFile = TRUE; | ||
| } | ||
| } |
There was a problem hiding this comment.
The new log_file configuration is parsed into dwHasLogFile/szLogFilePath, but these fields are not referenced anywhere else in the codebase (no writer/redirect in logging). As-is, this option is a no-op and could confuse users; either implement log redirection using these fields or remove the option/documentation until it’s supported.
Suggested change
| { | |
| WCHAR* pszValue = sOptionNameEnd; | |
| while (*pszValue == L' ' || *pszValue == L'\t') pszValue++; | |
| if (*pszValue) { | |
| StringCchCopyW(pPxchConfig->szLogFilePath, _countof(pPxchConfig->szLogFilePath), pszValue); | |
| pPxchConfig->dwHasLogFile = TRUE; | |
| } | |
| } | |
| /* | |
| * The log_file option is not currently supported on Windows; parsing it here | |
| * without actually redirecting logs would be misleading. Treat it as an | |
| * invalid configuration so users get a clear error instead of a silent no-op. | |
| */ | |
| pszParseErrorMessage = L"Configuration option 'log_file' is not supported; please remove or comment it out."; | |
| goto err_invalid_config_with_msg; |
src/dll/hook_winhttp_win32.c
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| // Build a proxy URL string like "socks5://host:port" or "http://host:port" | ||
| // from the first proxy in the configured proxy list. | ||
| static BOOL BuildProxyStringW(wchar_t* szProxy, DWORD cchProxy) | ||
| { | ||
| const PXCH_PROXY_DATA* pProxy; | ||
| const wchar_t* szScheme; | ||
| PXCH_UINT16 wPort; | ||
| wchar_t szHostW[PXCH_MAX_HOSTNAME_BUFSIZE]; | ||
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| if (!g_pPxchConfig || g_pPxchConfig->dwProxyNum == 0) return FALSE; | ||
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| pProxy = &PXCH_CONFIG_PROXY_ARR(g_pPxchConfig)[0]; | ||
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| if (ProxyIsType(SOCKS5, *pProxy)) { | ||
| szScheme = L"socks5"; | ||
| } else if (ProxyIsType(SOCKS4, *pProxy)) { | ||
| szScheme = L"socks4"; | ||
| } else if (ProxyIsType(HTTP, *pProxy)) { | ||
| szScheme = L"http"; | ||
| } else { | ||
| return FALSE; | ||
| } | ||
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| // Extract host and port from the proxy's HostPort | ||
| if (HostIsType(HOSTNAME, pProxy->CommonHeader.HostPort)) { | ||
| StringCchCopyW(szHostW, _countof(szHostW), pProxy->CommonHeader.HostPort.HostnamePort.szValue); | ||
| } else if (HostIsType(IPV4, pProxy->CommonHeader.HostPort)) { | ||
| const struct sockaddr_in* pSin = (const struct sockaddr_in*)&pProxy->CommonHeader.HostPort.IpPort.Sockaddr; | ||
| const unsigned char* b = (const unsigned char*)&pSin->sin_addr; | ||
| StringCchPrintfW(szHostW, _countof(szHostW), L"%u.%u.%u.%u", b[0], b[1], b[2], b[3]); | ||
| } else { | ||
| return FALSE; | ||
| } | ||
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| wPort = _byteswap_ushort(pProxy->CommonHeader.HostPort.CommonHeader.wPort); | ||
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| StringCchPrintfW(szProxy, cchProxy, L"%ls=%ls:%u", szScheme, szHostW, (unsigned int)wPort); | ||
| return TRUE; |
There was a problem hiding this comment.
BuildProxyStringW() formats the proxy as "socks5=host:port"/"socks4=host:port"/"http=host:port". WinHTTP/WinINet proxy strings use the scheme keys like "socks=..." (not socks4/socks5), and typically need protocol keys (e.g., "http=...;https=...") to apply consistently. As written, SOCKS proxies are likely ignored by WinHTTP/WinINet.
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| PROXY_FUNC2(WinINet, InternetSetOptionW) | ||
| { | ||
| if (dwOption == PXCH_INTERNET_OPTION_PROXY && lpBuffer && dwBufferLength >= sizeof(PXCH_INTERNET_PROXY_INFO_W)) { | ||
| wchar_t szProxy[512]; | ||
| if (BuildProxyStringW(szProxy, _countof(szProxy))) { | ||
| PXCH_INTERNET_PROXY_INFO_W* pProxyInfo = (PXCH_INTERNET_PROXY_INFO_W*)lpBuffer; | ||
| FUNCIPCLOGD(L"InternetSetOptionW: Overriding INTERNET_OPTION_PROXY to %ls", szProxy); | ||
| pProxyInfo->dwAccessType = PXCH_INTERNET_OPEN_TYPE_PROXY; | ||
| pProxyInfo->lpszProxy = szProxy; | ||
| pProxyInfo->lpszProxyBypass = L"<local>"; | ||
| } | ||
| } | ||
|
|
||
| return orig_fpWinINet_InternetSetOptionW(hInternet, dwOption, lpBuffer, dwBufferLength); |
There was a problem hiding this comment.
InternetSetOptionW hook mutates the caller’s INTERNET_PROXY_INFO_W buffer in-place and assigns lpszProxy to a stack buffer (szProxy). This can leave the caller with a dangling pointer after the API returns. Use a local copy of the struct (and stable string storage) when calling the original function, rather than overwriting the caller’s buffer.
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| // Extract the executable name from the application name or command line | ||
| if (lpApplicationName) { | ||
| pExeName = PathFindFileNameW(lpApplicationName); | ||
| } else if (lpCommandLine) { | ||
| // Skip leading whitespace and quotes | ||
| const wchar_t* p = lpCommandLine; | ||
| while (*p == L' ' || *p == L'\t') p++; | ||
| if (*p == L'"') { | ||
| p++; | ||
| pExeName = PathFindFileNameW(p); | ||
| } else { | ||
| pExeName = PathFindFileNameW(p); | ||
| } | ||
| } |
There was a problem hiding this comment.
ShouldInjectProcess() uses PathFindFileNameW() on lpCommandLine without isolating the executable token. For typical command lines (quoted path or with args), pExeName will include trailing quotes/arguments (e.g., "curl.exe" https://...") so the case-insensitive compare against "curl.exe" won’t match. Consider parsing the first argument properly (e.g., CommandLineToArgvW / PathGetArgsW+PathRemoveArgsW) and comparing only the basename.
src/dll/hook_createprocess_win32.c
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| wchar_t szAppNameW[PXCH_MAX_HOSTNAME_BUFSIZE] = { 0 }; | ||
| wchar_t szCmdLineW[PXCH_MAX_HOSTNAME_BUFSIZE] = { 0 }; | ||
| if (lpApplicationName) MultiByteToWideChar(CP_ACP, 0, lpApplicationName, -1, szAppNameW, PXCH_MAX_HOSTNAME_BUFSIZE); | ||
| if (lpCommandLine) MultiByteToWideChar(CP_ACP, 0, lpCommandLine, -1, szCmdLineW, PXCH_MAX_HOSTNAME_BUFSIZE); | ||
| if (!ShouldInjectProcess(lpApplicationName ? szAppNameW : NULL, lpCommandLine ? szCmdLineW : NULL)) { | ||
| IPCLOGD(L"CreateProcessA: Process filtered out, not injecting WINPID " WPRDW, ProcessInformation.dwProcessId); | ||
| if (!(dwCreationFlags & CREATE_SUSPENDED)) { | ||
| ResumeThread(ProcessInformation.hThread); | ||
| } | ||
| g_bCurrentlyInWinapiCall = FALSE; | ||
| SetLastError(dwLastError); | ||
| return 1; | ||
| } |
There was a problem hiding this comment.
In CreateProcessA, lpApplicationName/lpCommandLine are converted into fixed-size buffers of PXCH_MAX_HOSTNAME_BUFSIZE. Long paths/command lines will be truncated, which can cause incorrect process filter decisions (false allow/deny). It would be safer to size these buffers for command lines (or dynamically allocate based on MultiByteToWideChar’s required length).
Suggested change
| wchar_t szAppNameW[PXCH_MAX_HOSTNAME_BUFSIZE] = { 0 }; | |
| wchar_t szCmdLineW[PXCH_MAX_HOSTNAME_BUFSIZE] = { 0 }; | |
| if (lpApplicationName) MultiByteToWideChar(CP_ACP, 0, lpApplicationName, -1, szAppNameW, PXCH_MAX_HOSTNAME_BUFSIZE); | |
| if (lpCommandLine) MultiByteToWideChar(CP_ACP, 0, lpCommandLine, -1, szCmdLineW, PXCH_MAX_HOSTNAME_BUFSIZE); | |
| if (!ShouldInjectProcess(lpApplicationName ? szAppNameW : NULL, lpCommandLine ? szCmdLineW : NULL)) { | |
| IPCLOGD(L"CreateProcessA: Process filtered out, not injecting WINPID " WPRDW, ProcessInformation.dwProcessId); | |
| if (!(dwCreationFlags & CREATE_SUSPENDED)) { | |
| ResumeThread(ProcessInformation.hThread); | |
| } | |
| g_bCurrentlyInWinapiCall = FALSE; | |
| SetLastError(dwLastError); | |
| return 1; | |
| } | |
| LPWSTR pszAppNameW = NULL; | |
| LPWSTR pszCmdLineW = NULL; | |
| int cchAppNameW = 0; | |
| int cchCmdLineW = 0; | |
| // Convert lpApplicationName (if present) to a dynamically-sized wide string | |
| if (lpApplicationName) { | |
| cchAppNameW = MultiByteToWideChar(CP_ACP, 0, lpApplicationName, -1, NULL, 0); | |
| if (cchAppNameW > 0) { | |
| pszAppNameW = (LPWSTR)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (SIZE_T)cchAppNameW * sizeof(WCHAR)); | |
| if (pszAppNameW) { | |
| if (MultiByteToWideChar(CP_ACP, 0, lpApplicationName, -1, pszAppNameW, cchAppNameW) == 0) { | |
| HeapFree(GetProcessHeap(), 0, pszAppNameW); | |
| pszAppNameW = NULL; | |
| } | |
| } | |
| } | |
| } | |
| // Convert lpCommandLine (if present) to a dynamically-sized wide string | |
| if (lpCommandLine) { | |
| cchCmdLineW = MultiByteToWideChar(CP_ACP, 0, lpCommandLine, -1, NULL, 0); | |
| if (cchCmdLineW > 0) { | |
| pszCmdLineW = (LPWSTR)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (SIZE_T)cchCmdLineW * sizeof(WCHAR)); | |
| if (pszCmdLineW) { | |
| if (MultiByteToWideChar(CP_ACP, 0, lpCommandLine, -1, pszCmdLineW, cchCmdLineW) == 0) { | |
| HeapFree(GetProcessHeap(), 0, pszCmdLineW); | |
| pszCmdLineW = NULL; | |
| } | |
| } | |
| } | |
| } | |
| // If conversion failed, corresponding pointer(s) will be NULL and treated as "no name/command" | |
| if (!ShouldInjectProcess(pszAppNameW, pszCmdLineW)) { | |
| IPCLOGD(L"CreateProcessA: Process filtered out, not injecting WINPID " WPRDW, ProcessInformation.dwProcessId); | |
| if (!(dwCreationFlags & CREATE_SUSPENDED)) { | |
| ResumeThread(ProcessInformation.hThread); | |
| } | |
| if (pszAppNameW) { | |
| HeapFree(GetProcessHeap(), 0, pszAppNameW); | |
| } | |
| if (pszCmdLineW) { | |
| HeapFree(GetProcessHeap(), 0, pszCmdLineW); | |
| } | |
| g_bCurrentlyInWinapiCall = FALSE; | |
| SetLastError(dwLastError); | |
| return 1; | |
| } | |
| if (pszAppNameW) { | |
| HeapFree(GetProcessHeap(), 0, pszAppNameW); | |
| } | |
| if (pszCmdLineW) { | |
| HeapFree(GetProcessHeap(), 0, pszCmdLineW); | |
| } |
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|
|
||
| static void DnsCacheInit(void) | ||
| { | ||
| if (!g_bDnsCacheInitialized) { | ||
| InitializeCriticalSection(&g_csDnsCache); | ||
| ZeroMemory(g_DnsCache, sizeof(g_DnsCache)); | ||
| g_dwDnsCacheCount = 0; | ||
| g_bDnsCacheInitialized = TRUE; | ||
| } |
There was a problem hiding this comment.
DnsCacheInit() is not thread-safe: multiple threads can observe g_bDnsCacheInitialized==FALSE and concurrently call InitializeCriticalSection() / reset the cache, which is undefined behavior. Use a one-time init primitive (InitOnceExecuteOnce), InterlockedCompareExchange guard, or initialize the critical section at DLL init time to avoid races.
Suggested change
| static void DnsCacheInit(void) | |
| { | |
| if (!g_bDnsCacheInitialized) { | |
| InitializeCriticalSection(&g_csDnsCache); | |
| ZeroMemory(g_DnsCache, sizeof(g_DnsCache)); | |
| g_dwDnsCacheCount = 0; | |
| g_bDnsCacheInitialized = TRUE; | |
| } | |
| static INIT_ONCE g_DnsCacheInitOnce = INIT_ONCE_STATIC_INIT; | |
| static BOOL CALLBACK DnsCacheInitOnceCallback( | |
| PINIT_ONCE InitOnce, | |
| PVOID Parameter, | |
| PVOID *lpContext | |
| ) | |
| { | |
| UNREFERENCED_PARAMETER(InitOnce); | |
| UNREFERENCED_PARAMETER(Parameter); | |
| UNREFERENCED_PARAMETER(lpContext); | |
| InitializeCriticalSection(&g_csDnsCache); | |
| ZeroMemory(g_DnsCache, sizeof(g_DnsCache)); | |
| g_dwDnsCacheCount = 0; | |
| g_bDnsCacheInitialized = TRUE; | |
| return TRUE; | |
| } | |
| static void DnsCacheInit(void) | |
| { | |
| InitOnceExecuteOnce(&g_DnsCacheInitOnce, DnsCacheInitOnceCallback, NULL, NULL); |
src/dll/hook_connect_win32.c
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| WSADATA WsaData; | ||
| char ServerBoundAddrType; | ||
| TIMEVAL Timeout = { 5, 0 }; // 5 second timeout for DNS | ||
| fd_set rfds; | ||
|
|
||
| // We need Winsock initialized | ||
| WSAStartup(MAKEWORD(2, 2), &WsaData); | ||
|
|
There was a problem hiding this comment.
Socks5UdpAssociateDnsQuery() calls WSAStartup() on every DNS query but never calls WSACleanup(). This increases Winsock’s refcount and adds overhead per query. Consider initializing Winsock once for the process (or only if not already initialized) and balancing WSAStartup/WSACleanup, or reuse existing Winsock initialization already done elsewhere in the DLL.
Suggested change
| WSADATA WsaData; | |
| char ServerBoundAddrType; | |
| TIMEVAL Timeout = { 5, 0 }; // 5 second timeout for DNS | |
| fd_set rfds; | |
| // We need Winsock initialized | |
| WSAStartup(MAKEWORD(2, 2), &WsaData); | |
| char ServerBoundAddrType; | |
| TIMEVAL Timeout = { 5, 0 }; // 5 second timeout for DNS | |
| fd_set rfds; | |
Owner
|
@copilot apply changes based on the comments in this thread |
… pointers, registry restore Fixes from automated code review (PR #4 review 3809457914): 1. DnsCacheInit thread safety: Use InitOnceExecuteOnce instead of bare bool check 2. WSAStartup leak: Remove per-query WSAStartup (Winsock already init'd by DLL) 3. Traffic dump buffer overflow: Replace wsprintfA with StringCchPrintfW + WideCharToMultiByte 4. WinHTTP/WinINet scheme keys: socks5/socks4 -> socks= for WinHTTP compatibility 5. WinHttpSetOption dangling pointer: Use local WINHTTP_PROXY_INFO copy with static backing 6. InternetSetOptionA dangling pointer: Use local INTERNET_PROXY_INFO_A copy 7. InternetSetOptionW dangling pointer: Use local INTERNET_PROXY_INFO_W copy 8. Registry proxy side-effect: Gate behind PXCH_ENABLE_SYSTEM_PROXY=1 env var, save original values and restore on UninitHook/DLL detach 9. log_file config no-op: Return config error since feature is not implemented 10. ShouldInjectProcess: Properly parse quoted paths and strip trailing args 11. CreateProcessA buffer size: Dynamic HeapAlloc for ANSI->Wide conversion Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
Author
All 11 review comments applied in
|
Owner
…mpareExchange (XP), wcsncpy with wmemcpy Two compile errors from CI: 1. hook_connect_win32.c: InitOnceExecuteOnce/INIT_ONCE require _WIN32_WINNT>=0x0600 (Vista) but project targets 0x0502 (XP SP2). Replaced with InterlockedCompareExchange spin-lock pattern for thread-safe one-time DNS cache initialization. 2. hook_createprocess_win32.c: wcsncpy triggers error C4996 with /sdl (deprecated). Replaced with wmemcpy which is safe here since cchCopy is already bounds-checked and the buffer is explicitly null-terminated. Co-authored-by: EduardoA3677 <82284031+EduardoA3677@users.noreply.github.com>
Author
Downloaded and analyzed the CI build logs. Found 2 compile errors, fixed in
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CI Build Fixes + Code Review Fixes
CI Build Fix (this commit)
InitOnceExecuteOnceundefined (C4013): Replaced Vista-onlyINIT_ONCE/InitOnceExecuteOncewith XP-compatibleInterlockedCompareExchangespin-lock for thread-safe DNS cache initwcsncpydeprecated (C4996): Replaced withwmemcpy(safe — buffer already bounds-checked and null-terminated)Previous CI Build Fixes
OptionGetNumberValueAfterOptionNamemissing args (C2198)szHostAvariable, fix ProxyOverride registry sizeHINTERNET→void*, addwinsock2.hincludeiLocalAddrLen, replaceInetNtopAwith XP-compatible formattingDirectory.Build.propsto enforcev142toolsetCode Review Fixes (11 comments from automated review)
Features Implemented
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