Mercurial > hg > nginx
view src/os/win32/ngx_win32_init.c @ 7142:b9d919b53593 stable-1.12
Stream: relaxed next upstream condition (ticket #1317).
When switching to a next upstream, some buffers could be stuck in the middle
of the filter chain. A condition existed that raised an error when this
happened. As it turned out, this condition prevented switching to a next
upstream if ssl preread was used with the TCP protocol (see the ticket).
In fact, the condition does not make sense for TCP, since after successful
connection to an upstream switching to another upstream never happens. As for
UDP, the issue with stuck buffers is unlikely to happen, but is still possible.
Specifically, if a filter delays sending data to upstream.
The condition can be relaxed to only check the "buffered" bitmask of the
upstream connection. The new condition is simpler and fixes the ticket issue
as well. Additionally, the upstream_out chain is now reset for UDP prior to
connecting to a new upstream to prevent repeating the client data twice.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Mon, 11 Sep 2017 15:32:31 +0300 |
parents | 56fc55e32f23 |
children | 4089b3d2cb59 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> #include <nginx.h> ngx_uint_t ngx_win32_version; ngx_uint_t ngx_ncpu; ngx_uint_t ngx_max_wsabufs; ngx_int_t ngx_max_sockets; ngx_uint_t ngx_inherited_nonblocking = 1; ngx_uint_t ngx_tcp_nodelay_and_tcp_nopush; char ngx_unique[NGX_INT32_LEN + 1]; ngx_os_io_t ngx_os_io = { ngx_wsarecv, ngx_wsarecv_chain, ngx_udp_wsarecv, ngx_wsasend, NULL, NULL, ngx_wsasend_chain, 0 }; typedef struct { WORD wServicePackMinor; WORD wSuiteMask; BYTE wProductType; } ngx_osviex_stub_t; static u_int osviex; static OSVERSIONINFOEX osvi; /* Should these pointers be per protocol ? */ LPFN_ACCEPTEX ngx_acceptex; LPFN_GETACCEPTEXSOCKADDRS ngx_getacceptexsockaddrs; LPFN_TRANSMITFILE ngx_transmitfile; LPFN_TRANSMITPACKETS ngx_transmitpackets; LPFN_CONNECTEX ngx_connectex; LPFN_DISCONNECTEX ngx_disconnectex; static GUID ax_guid = WSAID_ACCEPTEX; static GUID as_guid = WSAID_GETACCEPTEXSOCKADDRS; static GUID tf_guid = WSAID_TRANSMITFILE; static GUID tp_guid = WSAID_TRANSMITPACKETS; static GUID cx_guid = WSAID_CONNECTEX; static GUID dx_guid = WSAID_DISCONNECTEX; ngx_int_t ngx_os_init(ngx_log_t *log) { DWORD bytes; SOCKET s; WSADATA wsd; ngx_err_t err; ngx_time_t *tp; ngx_uint_t n; SYSTEM_INFO si; /* get Windows version */ ngx_memzero(&osvi, sizeof(OSVERSIONINFOEX)); osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); #ifdef _MSC_VER #pragma warning(disable:4996) #endif osviex = GetVersionEx((OSVERSIONINFO *) &osvi); if (osviex == 0) { osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX); if (GetVersionEx((OSVERSIONINFO *) &osvi) == 0) { ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "GetVersionEx() failed"); return NGX_ERROR; } } #ifdef _MSC_VER #pragma warning(default:4996) #endif /* * Windows 3.1 Win32s 0xxxxx * * Windows 95 140000 * Windows 98 141000 * Windows ME 149000 * Windows NT 3.51 235100 * Windows NT 4.0 240000 * Windows NT 4.0 SP5 240050 * Windows 2000 250000 * Windows XP 250100 * Windows 2003 250200 * Windows Vista/2008 260000 * * Windows CE x.x 3xxxxx */ ngx_win32_version = osvi.dwPlatformId * 100000 + osvi.dwMajorVersion * 10000 + osvi.dwMinorVersion * 100; if (osviex) { ngx_win32_version += osvi.wServicePackMajor * 10 + osvi.wServicePackMinor; } GetSystemInfo(&si); ngx_pagesize = si.dwPageSize; ngx_allocation_granularity = si.dwAllocationGranularity; ngx_ncpu = si.dwNumberOfProcessors; ngx_cacheline_size = NGX_CPU_CACHE_LINE; for (n = ngx_pagesize; n >>= 1; ngx_pagesize_shift++) { /* void */ } /* delete default "C" locale for _wcsicmp() */ setlocale(LC_ALL, ""); /* init Winsock */ if (WSAStartup(MAKEWORD(2,2), &wsd) != 0) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, "WSAStartup() failed"); return NGX_ERROR; } if (ngx_win32_version < NGX_WIN_NT) { ngx_max_wsabufs = 16; return NGX_OK; } /* STUB: ngx_uint_t max */ ngx_max_wsabufs = 1024 * 1024; /* * get AcceptEx(), GetAcceptExSockAddrs(), TransmitFile(), * TransmitPackets(), ConnectEx(), and DisconnectEx() addresses */ s = ngx_socket(AF_INET, SOCK_STREAM, IPPROTO_IP); if (s == (ngx_socket_t) -1) { ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno, ngx_socket_n " failed"); return NGX_ERROR; } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &ax_guid, sizeof(GUID), &ngx_acceptex, sizeof(LPFN_ACCEPTEX), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_ACCEPTEX) failed"); } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &as_guid, sizeof(GUID), &ngx_getacceptexsockaddrs, sizeof(LPFN_GETACCEPTEXSOCKADDRS), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_GETACCEPTEXSOCKADDRS) failed"); } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &tf_guid, sizeof(GUID), &ngx_transmitfile, sizeof(LPFN_TRANSMITFILE), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_TRANSMITFILE) failed"); } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &tp_guid, sizeof(GUID), &ngx_transmitpackets, sizeof(LPFN_TRANSMITPACKETS), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_TRANSMITPACKETS) failed"); } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &cx_guid, sizeof(GUID), &ngx_connectex, sizeof(LPFN_CONNECTEX), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_CONNECTEX) failed"); } if (WSAIoctl(s, SIO_GET_EXTENSION_FUNCTION_POINTER, &dx_guid, sizeof(GUID), &ngx_disconnectex, sizeof(LPFN_DISCONNECTEX), &bytes, NULL, NULL) == -1) { ngx_log_error(NGX_LOG_NOTICE, log, ngx_socket_errno, "WSAIoctl(SIO_GET_EXTENSION_FUNCTION_POINTER, " "WSAID_DISCONNECTEX) failed"); } if (ngx_close_socket(s) == -1) { ngx_log_error(NGX_LOG_ALERT, log, ngx_socket_errno, ngx_close_socket_n " failed"); } if (GetEnvironmentVariable("ngx_unique", ngx_unique, NGX_INT32_LEN + 1) != 0) { ngx_process = NGX_PROCESS_WORKER; } else { err = ngx_errno; if (err != ERROR_ENVVAR_NOT_FOUND) { ngx_log_error(NGX_LOG_EMERG, log, err, "GetEnvironmentVariable(\"ngx_unique\") failed"); return NGX_ERROR; } ngx_sprintf((u_char *) ngx_unique, "%P%Z", ngx_pid); } tp = ngx_timeofday(); srand((ngx_pid << 16) ^ (unsigned) tp->sec ^ tp->msec); return NGX_OK; } void ngx_os_status(ngx_log_t *log) { ngx_osviex_stub_t *osviex_stub; ngx_log_error(NGX_LOG_NOTICE, log, 0, NGINX_VER_BUILD); if (osviex) { /* * the MSVC 6.0 SP2 defines wSuiteMask and wProductType * as WORD wReserved[2] */ osviex_stub = (ngx_osviex_stub_t *) &osvi.wServicePackMinor; ngx_log_error(NGX_LOG_INFO, log, 0, "OS: %ud build:%ud, \"%s\", suite:%Xd, type:%ud", ngx_win32_version, osvi.dwBuildNumber, osvi.szCSDVersion, osviex_stub->wSuiteMask, osviex_stub->wProductType); } else { if (osvi.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) { /* Win9x build */ ngx_log_error(NGX_LOG_INFO, log, 0, "OS: %u build:%ud.%ud.%ud, \"%s\"", ngx_win32_version, osvi.dwBuildNumber >> 24, (osvi.dwBuildNumber >> 16) & 0xff, osvi.dwBuildNumber & 0xffff, osvi.szCSDVersion); } else { /* * VER_PLATFORM_WIN32_NT * * we do not currently support VER_PLATFORM_WIN32_CE * and we do not support VER_PLATFORM_WIN32s at all */ ngx_log_error(NGX_LOG_INFO, log, 0, "OS: %ud build:%ud, \"%s\"", ngx_win32_version, osvi.dwBuildNumber, osvi.szCSDVersion); } } }