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397 lines
12 KiB
397 lines
12 KiB
/*==LICENSE==* |
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CyanWorlds.com Engine - MMOG client, server and tools |
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Copyright (C) 2011 Cyan Worlds, Inc. |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program. If not, see <http://www.gnu.org/licenses/>. |
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Additional permissions under GNU GPL version 3 section 7 |
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If you modify this Program, or any covered work, by linking or |
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combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK, |
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NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent |
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JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK |
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(or a modified version of those libraries), |
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containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA, |
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PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG |
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JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the |
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licensors of this Program grant you additional |
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permission to convey the resulting work. Corresponding Source for a |
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non-source form of such a combination shall include the source code for |
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the parts of OpenSSL and IJG JPEG Library used as well as that of the covered |
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work. |
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You can contact Cyan Worlds, Inc. by email legal@cyan.com |
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or by snail mail at: |
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Cyan Worlds, Inc. |
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14617 N Newport Hwy |
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Mead, WA 99021 |
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*==LICENSE==*/ |
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/***************************************************************************** |
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* |
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* $/Plasma20/Sources/Plasma/NucleusLib/pnAsyncCoreExe/Private/Win32/pnAceW32Dns.cpp |
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* |
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***/ |
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#include "../../Pch.h" |
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#pragma hdrstop |
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/***************************************************************************** |
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* |
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* Private |
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* |
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***/ |
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enum { |
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WM_LOOKUP_EXIT = WM_APP, |
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WM_LOOKUP_FOUND_HOST |
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}; |
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const unsigned kMaxLookupName = 128; |
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struct Lookup { |
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LINK(Lookup) link; |
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AsyncCancelId cancelId; |
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HANDLE cancelHandle; |
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FAsyncLookupProc lookupProc; |
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unsigned port; |
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void * param; |
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char name[kMaxLookupName]; |
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char buffer[MAXGETHOSTSTRUCT]; |
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}; |
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static CCritSect s_critsect; |
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static LISTDECL(Lookup, link) s_lookupList; |
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static HANDLE s_lookupThread; |
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static HWND s_lookupWindow; |
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static unsigned s_nextLookupCancelId = 1; |
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/***************************************************************************** |
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* |
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* Internal functions |
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* |
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***/ |
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//=========================================================================== |
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static void LookupProcess (Lookup * lookup, unsigned error) { |
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unsigned count = 0; |
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NetAddress * addrs = nil; |
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if (error) |
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return; |
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const HOSTENT & host = * (HOSTENT *) lookup->buffer; |
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if (host.h_addrtype != AF_INET) |
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return; |
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if (host.h_length != sizeof(in_addr)) |
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return; |
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if (!host.h_addr_list) |
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return; |
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in_addr const * const * const inAddr = (in_addr **) host.h_addr_list; |
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// count the number of addresses |
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while (inAddr[count]) |
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++count; |
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// allocate a buffer large enough to hold all the addresses |
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addrs = (NetAddress *)malloc(sizeof(*addrs) * count); |
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memset(addrs, 0, sizeof(*addrs) * count); |
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// fill in address data |
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const uint16_t port = htons((uint16_t) lookup->port); |
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for (unsigned i = 0; i < count; ++i) { |
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sockaddr_in * inetaddr = (sockaddr_in *) &addrs[i]; |
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inetaddr->sin_family = AF_INET; |
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inetaddr->sin_addr = *inAddr[i]; |
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inetaddr->sin_port = port; |
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} |
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if (host.h_name && host.h_name[0]) |
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strncpy(lookup->name, host.h_name, arrsize(lookup->name)); |
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if (lookup->lookupProc) |
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lookup->lookupProc(lookup->param, lookup->name, count, addrs); |
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// we can delete the operation outside an IoConn critical |
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// section because it isn't linked into an ioConn opList |
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// and because connection attempts are not waitable |
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ASSERT(!lookup->link.IsLinked()); |
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delete lookup; |
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PerfSubCounter(kAsyncPerfNameLookupAttemptsCurr, 1); |
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free(addrs); |
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} |
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//=========================================================================== |
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static void LookupFindAndProcess (HANDLE cancelHandle, unsigned error) { |
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// find the operation for this cancel handle |
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Lookup * lookup; |
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s_critsect.Enter(); |
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for (lookup = s_lookupList.Head(); lookup; lookup = s_lookupList.Next(lookup)) { |
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if (lookup->cancelHandle == cancelHandle) { |
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lookup->cancelHandle = nil; |
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s_lookupList.Unlink(lookup); |
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break; |
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} |
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} |
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s_critsect.Leave(); |
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if (lookup) |
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LookupProcess(lookup, error); |
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} |
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//=========================================================================== |
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static unsigned THREADCALL LookupThreadProc (AsyncThread * thread) { |
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static const char WINDOW_CLASS[] = "AsyncLookupWnd"; |
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WNDCLASS wc; |
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memset(&wc, 0, sizeof(wc)); |
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wc.lpfnWndProc = DefWindowProc; |
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wc.hInstance = GetModuleHandle(0); |
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wc.lpszClassName = WINDOW_CLASS; |
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RegisterClass(&wc); |
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s_lookupWindow = CreateWindow( |
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WINDOW_CLASS, |
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WINDOW_CLASS, |
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WS_OVERLAPPED, |
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CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, |
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(HWND)0, |
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(HMENU) 0, |
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wc.hInstance, |
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0 |
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); |
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if (!s_lookupWindow) |
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ErrorAssert(__LINE__, __FILE__, "CreateWindow %#x", GetLastError()); |
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HANDLE lookupStartEvent = (HANDLE) thread->argument; |
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SetEvent(lookupStartEvent); |
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MSG msg; |
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while (GetMessage(&msg, s_lookupWindow, 0, 0)) { |
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if (msg.message == WM_LOOKUP_FOUND_HOST) |
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LookupFindAndProcess((HANDLE) msg.wParam, HIWORD(msg.lParam)); |
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else if (msg.message == WM_LOOKUP_EXIT) |
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break; |
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else { |
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TranslateMessage(&msg); |
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DispatchMessage(&msg); |
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} |
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} |
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// fail all pending name lookups |
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for (;;) { |
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s_critsect.Enter(); |
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Lookup * lookup = s_lookupList.Head(); |
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if (lookup) { |
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WSACancelAsyncRequest(lookup->cancelHandle); |
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lookup->cancelHandle = nil; |
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s_lookupList.Unlink(lookup); |
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} |
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s_critsect.Leave(); |
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if (!lookup) |
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break; |
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LookupProcess(lookup, (unsigned) -1); |
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} |
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// cleanup |
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DestroyWindow(s_lookupWindow); |
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s_lookupWindow = nil; |
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return 0; |
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} |
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//=========================================================================== |
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static void StartLookupThread () { |
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if (s_lookupThread) |
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return; |
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// create a shutdown event |
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HANDLE lookupStartEvent = CreateEvent( |
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(LPSECURITY_ATTRIBUTES) 0, |
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true, // manual reset |
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false, // initial state off |
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(LPCTSTR) 0 // name |
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); |
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if (!lookupStartEvent) |
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ErrorAssert(__LINE__, __FILE__, "CreateEvent %#x", GetLastError()); |
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// create a thread to perform lookups |
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s_lookupThread = (HANDLE) AsyncThreadCreate( |
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LookupThreadProc, |
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lookupStartEvent, |
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L"AsyncLookupThread" |
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); |
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WaitForSingleObject(lookupStartEvent, INFINITE); |
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CloseHandle(lookupStartEvent); |
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ASSERT(s_lookupWindow); |
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} |
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/***************************************************************************** |
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* |
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* Module functions |
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* |
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***/ |
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//=========================================================================== |
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void DnsDestroy (unsigned exitThreadWaitMs) { |
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if (s_lookupThread) { |
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PostMessage(s_lookupWindow, WM_LOOKUP_EXIT, 0, 0); |
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WaitForSingleObject(s_lookupThread, exitThreadWaitMs); |
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CloseHandle(s_lookupThread); |
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s_lookupThread = nil; |
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ASSERT(!s_lookupWindow); |
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} |
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} |
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/***************************************************************************** |
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* |
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* Public functions |
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* |
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***/ |
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//=========================================================================== |
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void AsyncAddressLookupName ( |
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AsyncCancelId * cancelId, // out |
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FAsyncLookupProc lookupProc, |
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const char* name, |
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unsigned port, |
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void * param |
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) { |
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ASSERT(lookupProc); |
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ASSERT(name); |
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PerfAddCounter(kAsyncPerfNameLookupAttemptsCurr, 1); |
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PerfAddCounter(kAsyncPerfNameLookupAttemptsTotal, 1); |
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// Get name/port |
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char* ansiName = strdup(name); |
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if (char* portStr = StrChr(ansiName, ':')) { |
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if (unsigned newPort = StrToUnsigned(portStr + 1, nil, 10)) |
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port = newPort; |
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*portStr = 0; |
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} |
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// Initialize lookup |
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Lookup * lookup = new Lookup; |
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lookup->lookupProc = lookupProc; |
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lookup->port = port; |
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lookup->param = param; |
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strncpy(lookup->name, name, arrsize(lookup->name)); |
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s_critsect.Enter(); |
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{ |
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// Start the lookup thread if it wasn't started already |
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StartLookupThread(); |
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s_lookupList.Link(lookup); |
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// get cancel id; we can avoid checking for zero by always using an odd number |
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ASSERT(s_nextLookupCancelId & 1); |
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s_nextLookupCancelId += 2; |
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*cancelId = lookup->cancelId = (AsyncCancelId) s_nextLookupCancelId; |
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// Perform async lookup |
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lookup->cancelHandle = WSAAsyncGetHostByName( |
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s_lookupWindow, |
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WM_LOOKUP_FOUND_HOST, |
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name, |
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&lookup->buffer[0], |
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sizeof(lookup->buffer) |
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); |
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if (!lookup->cancelHandle) { |
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PostMessage(s_lookupWindow, WM_LOOKUP_FOUND_HOST, nil, (unsigned) -1); |
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} |
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} |
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s_critsect.Leave(); |
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} |
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//=========================================================================== |
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void AsyncAddressLookupAddr ( |
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AsyncCancelId * cancelId, // out |
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FAsyncLookupProc lookupProc, |
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const NetAddress & address, |
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void * param |
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) { |
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ASSERT(lookupProc); |
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PerfAddCounter(kAsyncPerfNameLookupAttemptsCurr, 1); |
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PerfAddCounter(kAsyncPerfNameLookupAttemptsTotal, 1); |
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// Initialize lookup |
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Lookup * lookup = new Lookup; |
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lookup->lookupProc = lookupProc; |
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lookup->port = 1; |
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lookup->param = param; |
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plString str = address.GetHostString(); |
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strncpy(lookup->name, str.c_str(), arrsize(lookup->name)); |
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s_critsect.Enter(); |
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{ |
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// Start the lookup thread if it wasn't started already |
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StartLookupThread(); |
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s_lookupList.Link(lookup); |
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// get cancel id; we can avoid checking for zero by always using an odd number |
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ASSERT(s_nextLookupCancelId & 1); |
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s_nextLookupCancelId += 2; |
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*cancelId = lookup->cancelId = (AsyncCancelId) s_nextLookupCancelId; |
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// Perform async lookup |
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u_long addr = ((const sockaddr_in *) &address)->sin_addr.S_un.S_addr; |
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lookup->cancelHandle = WSAAsyncGetHostByAddr( |
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s_lookupWindow, |
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WM_LOOKUP_FOUND_HOST, |
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(const char *) &addr, |
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sizeof(addr), |
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AF_INET, |
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&lookup->buffer[0], |
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sizeof(lookup->buffer) |
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); |
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if (!lookup->cancelHandle) { |
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PostMessage(s_lookupWindow, WM_LOOKUP_FOUND_HOST, nil, (unsigned) -1); |
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} |
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} |
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s_critsect.Leave(); |
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} |
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//=========================================================================== |
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void AsyncAddressLookupCancel ( |
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FAsyncLookupProc lookupProc, |
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AsyncCancelId cancelId // nil = cancel all with specified lookupProc |
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) { |
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s_critsect.Enter(); |
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for (Lookup * lookup = s_lookupList.Head(); lookup; lookup = s_lookupList.Next(lookup)) { |
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if (lookup->lookupProc && (lookup->lookupProc != lookupProc)) |
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continue; |
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if (cancelId && (lookup->cancelId != cancelId)) |
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continue; |
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if (!lookup->cancelHandle) |
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continue; |
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// cancel this request |
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WSACancelAsyncRequest(lookup->cancelHandle); |
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lookup->cancelHandle = nil; |
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// initiate user callback |
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PostMessage(s_lookupWindow, WM_LOOKUP_FOUND_HOST, nil, (unsigned) -1); |
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} |
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s_critsect.Leave(); |
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}
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