Implemented unicode-based name resolution.

src/net/common/socket_helper_cmn.cpp

@@ -16,22 +16,42 @@
  *   Free Software Foundation, Inc.,                                       *
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  ***************************************************************************/
-#ifndef _WIN32
-#error This source code is Win32 only.
-#endif
 
-#include "socket_helper.h"
+#include <net/socket_helper.h>
+#include <cstring>
+
+using namespace std;
 
 
 bool
-socket_string_to_addr(const char *str, int addrFamily, struct sockaddr * addr, int addrLen)
+internal_socket_resolve(const char *str, const char *port, int addrFamily, int sockType, int protocol, struct sockaddr *addr, int addrLen)
-{
-	// TODO: convert str from UTF-8 to UTF-16 (Win32 byte order)
-	//return (WSAStringToAddress((wchar_t *)str, addrFamily, NULL, addr, &addrLen) != SOCKET_ERROR);
-}
-
-bool
-socket_resolve(const char *str, int addrFamily, int sockType, int protocol, struct sockaddr *addr, int addrLen)
 {
+	bool retVal = false;
+
+	if (str && *str != 0)
+	{
+		struct addrinfo aiHints;
+		struct addrinfo *aiList = NULL;
+
+		memset(&aiHints, 0, sizeof(aiHints));
+		aiHints.ai_family = addrFamily;
+		aiHints.ai_socktype = sockType;
+		aiHints.ai_protocol = protocol;
+
+		// Try to resolve the name.
+		// Will (hopefully) use UTF-8 if called on Linux.
+		bool success = (getaddrinfo(str, port, &aiHints, &aiList) == 0);
+
+		if (success && aiList)
+		{
+			if ((int)aiList->ai_addrlen <= addrLen)
+			{
+				memcpy(addr, aiList->ai_addr, aiList->ai_addrlen);
+				retVal = true;
+			}
+			freeaddrinfo(aiList);
+		}
+	}
+	return retVal;
 }
 

src/net/genericsocket.h

@@ -23,6 +23,7 @@
 #ifdef _WIN32
 #include <winsock2.h>
 #include <ws2tcpip.h>
+#include <wspiapi.h>
 #else
 #include <sys/types.h>
 #include <sys/socket.h>

src/net/linux/socket_helper.cpp

@@ -20,7 +20,7 @@
 #error This source code is not for Win32.
 #endif
 
-#include "socket_helper.h"
+#include <net/socket_helper.h>
 
 
 bool
@@ -35,7 +35,8 @@ socket_string_to_addr(const char *str, int addrFamily, struct sockaddr * addr, i
 }
 
 bool
-socket_resolve(const char *str, int addrFamily, int sockType, int protocol, struct sockaddr *addr, int addrLen)
+socket_resolve(const char *str, const char *port, int addrFamily, int sockType, int protocol, struct sockaddr *addr, int addrLen)
 {
+	return internal_socket_resolve(str, port, addrFamily, sockType, protocol, addr, addrLen);
 }
 

src/net/linux/socket_startup.cpp

@@ -20,7 +20,7 @@
 #error This source code is not for Win32.
 #endif
 
-#include "socket_startup.h"
+#include <net/socket_startup.h>
 
 bool
 socket_startup()

src/net/socket_helper.h

@@ -20,7 +20,7 @@
 #ifndef _SOCKET_HELPER_H_
 #define _SOCKET_HELPER_H_
 
-#include "genericsocket.h"
+#include <net/genericsocket.h>
 
 #ifndef bzero
 	#include <cstring>
@@ -54,7 +54,12 @@ bool socket_string_to_addr(const char *str, int addrFamily, struct sockaddr *add
  * Resolve a name to a numeric address.
  * str is assumed to be UTF-8 encoded.
  */
-bool socket_resolve(const char *str, int addrFamily, int sockType, int protocol, struct sockaddr *addr, int addrLen);
+bool socket_resolve(const char *str, const char *port, int addrFamily, int sockType, int protocol, struct sockaddr *addr, int addrLen);
+
+/**
+ * Internal function (common for all OSs).
+ */
+bool internal_socket_resolve(const char *str, const char *port, int addrFamily, int sockType, int protocol, struct sockaddr *addr, int addrLen);
 
 #endif
 

src/net/win32/socket_helper.cpp

@@ -0,0 +1,130 @@
+/***************************************************************************
+ *   Copyright (C) 2007 by Lothar May                                      *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+#ifndef _WIN32
+#error This source code is Win32 only.
+#endif
+
+#include <net/socket_helper.h>
+
+#include <windows.h>
+#include <string>
+#include <cstring>
+
+using namespace std;
+
+typedef int (WSAAPI * getaddrinfow_ptr_t)(const wchar_t *nodename, const wchar_t* servname,
+			const ADDRINFOW *hints, PADDRINFOW *res);
+typedef void (WSAAPI * freeaddrinfow_ptr_t)(PADDRINFOW ai);
+
+static wstring
+utf8ToWchar(const char *str)
+{
+	// convert str from UTF-8 to UTF-16 (Win32 byte order)
+	wstring retStr;
+	if (str)
+	{
+		size_t len = strlen(str) + 1;
+		if (len > 1)
+		{
+			size_t reqLen = ::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, str, len, NULL, 0);
+
+			if (reqLen)
+			{
+				wchar_t *wstr = new wchar_t[reqLen];
+				wstr[0] = L'\0';
+				if (::MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, str, len, wstr, reqLen) == reqLen)
+					retStr = wstr;
+				delete[] wstr;
+			}
+		}
+	}
+	return retStr;
+}
+
+bool
+socket_string_to_addr(const char *str, int addrFamily, struct sockaddr * addr, int addrLen)
+{
+	bool retVal = false;
+#ifdef UNICODE
+	// convert str from UTF-8 to UTF-16 (Win32 byte order)
+	wstring wstr(utf8ToWchar(str));
+	if (!wstr.empty())
+		retVal = (WSAStringToAddress((LPWSTR)wstr.c_str(), addrFamily, NULL, addr, &addrLen) != SOCKET_ERROR);
+#else
+	if (str && *str != 0)
+		retVal = (WSAStringToAddress(str, addrFamily, NULL, addr, &addrLen) != SOCKET_ERROR);
+#endif
+
+	return retVal;
+}
+
+bool
+socket_resolve(const char *str, const char *port, int addrFamily, int sockType, int protocol, struct sockaddr *addr, int addrLen)
+{
+	bool retVal = false;
+	bool useUnicodeCall = false;
+
+	if (str && *str != 0)
+	{
+		HMODULE hWsock = ::LoadLibraryA("ws2_32");
+
+		if (hWsock)
+		{
+			// Determine functions at runtime, because some operating system do not
+			// support the unicode version of getaddrinfo.
+			getaddrinfow_ptr_t getaddrinfow_ptr = (getaddrinfow_ptr_t)::GetProcAddress(hWsock, "GetAddrInfoW");
+			freeaddrinfow_ptr_t freeaddrinfow_ptr = (freeaddrinfow_ptr_t)::GetProcAddress(hWsock, "FreeAddrInfoW");
+
+			if (getaddrinfow_ptr && freeaddrinfow_ptr)
+			{
+				useUnicodeCall = true;
+
+				// convert str from UTF-8 to UTF-16 (Win32 byte order)
+				wstring wstr(utf8ToWchar(str));
+				wstring wport(utf8ToWchar(port));
+				ADDRINFOW aiHints;
+				ADDRINFOW *aiList = NULL;
+
+				memset(&aiHints, 0, sizeof(aiHints));
+				aiHints.ai_family = addrFamily;
+				aiHints.ai_socktype = sockType;
+				aiHints.ai_protocol = protocol;
+
+				bool success = (getaddrinfow_ptr(wstr.c_str(), wport.c_str(), &aiHints, &aiList) == 0);
+
+				if (success && aiList)
+				{
+					if ((int)aiList->ai_addrlen <= addrLen)
+					{
+						memcpy(addr, aiList->ai_addr, aiList->ai_addrlen);
+						retVal = true;
+					}
+					freeaddrinfow_ptr(aiList);
+				}
+			}
+			::FreeLibrary(hWsock);
+		}
+		// If we cannot use the unicode function (OS older than XP SP 2),
+		// we call the "classic" getaddrinfo.
+		if (!useUnicodeCall)
+			retVal = internal_socket_resolve(str, port, addrFamily, sockType, protocol, addr, addrLen);
+	}
+	return retVal;
+}
+

src/net/win32/socket_startup.cpp

@@ -20,7 +20,8 @@
 #error This source code is Win32 only.
 #endif
 
-#include <winsock2.h>
+#include <net/socket_startup.h>
+#include <net/socket_helper.h>
 
 #define USE_SOCKET_VERSION_MAJOR	2
 #define USE_SOCKET_VERSION_MINOR	2