2005-04-29 Michael Koch <konqueror@gmx.de>

* java/net/NetworkInterface.java
	(static): Removed.
	(NetworkInterface(String,InetAddress)): Made package-private.
	(NetworkInterface(String,InetAddress[])): New constructor.
	(getRealNetworkInterfaces): Removed.
	(getByName): Use VMNetworkInterface.getInterfaces().
	(getByInetAddress): Likewise.
	(getNetworkInterfaces): Likewise.
	* java/net/VMNetworkInterface.java,
	java/net/natVMNetworkInterfaceNoNet.cc,
	java/net/natVMNetworkInterfacePosix.c,c
	java/net/natVMNetworkInterfaceWin32.cc: New files.
	* java/net/natNetworkInterfaceNoNet.cc,
	java/net/natNetworkInterfacePosix.cc,
	 java/net/natNetworkInterfaceWin32.cc: Removed.
	* configure.ac
	* Makefile.am
	* configure, Makefile.in: Regenerated.

From-SVN: r99021

libjava/java/net/natVMNetworkInterfaceWin32.cc

@@ -0,0 +1,143 @@
+/* Copyright (C) 2003, 2005  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+#include <config.h>
+#include <platform.h>
+
+#undef STRICT
+
+#include <java/net/NetworkInterface.h>
+#include <java/net/Inet4Address.h>
+#include <java/net/SocketException.h>
+#include <java/util/Vector.h>
+
+/* As of this writing, NetworkInterface.java has
+   getName() == getDisplayName() and only one IP address
+   per interface. If this changes, we'll need to use
+   iphlpapi (not supported on Win95) to retrieve richer
+   adapter information via GetAdaptersInfo(). In this
+   module, we provide the necessary hooks to detect the
+   presence of iphlpapi and use it if necessary, but
+   comment things out for now to avoid compiler warnings. */
+
+enum {MAX_INTERFACES = 50};
+
+typedef int
+(*PfnGetRealNetworkInterfaces) (jstring* pjstrName,
+  java::net::InetAddress** ppAddress);
+
+static int
+winsock2GetRealNetworkInterfaces (jstring* pjstrName,
+  java::net::InetAddress** ppAddress)
+{
+  // FIXME: Add IPv6 support.
+  
+  INTERFACE_INFO arInterfaceInfo[MAX_INTERFACES];
+
+  // Open a (random) socket to have a file descriptor for the WSAIoctl call.
+  SOCKET skt = ::socket (AF_INET, SOCK_DGRAM, 0);
+  if (skt == INVALID_SOCKET) 
+    _Jv_ThrowSocketException ();
+    
+  DWORD dwOutBufSize;
+  int nRetCode = ::WSAIoctl (skt, SIO_GET_INTERFACE_LIST,
+    NULL, 0, &arInterfaceInfo, sizeof(arInterfaceInfo),
+    &dwOutBufSize, NULL, NULL);
+    
+  if (nRetCode == SOCKET_ERROR)
+  {
+    DWORD dwLastErrorCode = WSAGetLastError ();
+    ::closesocket (skt);
+    _Jv_ThrowSocketException (dwLastErrorCode);
+  }
+  
+  // Get addresses of all interfaces.
+  int nNbInterfaces = dwOutBufSize / sizeof(INTERFACE_INFO);
+  int nCurETHInterface = 0;
+  for (int i=0; i < nNbInterfaces; ++i) 
+    {
+      int len = 4;
+      jbyteArray baddr = JvNewByteArray (len);
+      SOCKADDR_IN* pAddr = (SOCKADDR_IN*) &arInterfaceInfo[i].iiAddress;
+      memcpy (elements (baddr), &(pAddr->sin_addr), len);
+
+      // Concoct a name for this interface. Since we don't
+      // have access to the real name under Winsock 2, we use
+      // "lo" for the loopback interface and ethX for the
+      // real ones.
+      TCHAR szName[30];
+      u_long lFlags = arInterfaceInfo[i].iiFlags;
+
+      if (lFlags & IFF_LOOPBACK)
+        _tcscpy (szName, _T("lo"));
+      else
+        {
+          _tcscpy (szName, _T("eth"));
+          wsprintf(szName+3, _T("%d"), nCurETHInterface++);
+        }
+
+      jstring if_name = _Jv_Win32NewString (szName);
+      java::net::Inet4Address* address =
+        new java::net::Inet4Address (baddr, JvNewStringLatin1 (""));
+      pjstrName[i] = if_name;
+      ppAddress[i] = address;
+    }
+
+  ::closesocket (skt);
+  
+  return nNbInterfaces;
+}
+
+/*
+static int
+iphlpapiGetRealNetworkInterfaces (jstring* pjstrName,
+  java::net::InetAddress** ppAddress)
+{
+  return 0;
+}
+*/
+
+static PfnGetRealNetworkInterfaces
+determineGetRealNetworkInterfacesFN ()
+{
+  /* FIXME: Try to dynamically load iphlpapi.dll and
+     detect the presence of GetAdaptersInfo() using
+     GetProcAddress(). If successful, return
+     iphlpapiGetRealNetworkInterfaces; if not,
+     return winsock2GetRealNetworkInterfaces */
+  return &winsock2GetRealNetworkInterfaces;
+}
+
+::java::util::Vector*
+java::net::VMNetworkInterface::getInterfaces ()
+{
+  // This next declaration used to be a static local,
+  // but this introduced a dependency on libsupc++ due
+  // to _cxa_guard_acquire and _cxa_guard_release.
+  // When Win95 is gone and we eventually get rid of
+  // winsock2GetRealNetworkInterfaces, we can rework
+  // all of this. Alternatively, we could move this all
+  // to win32.cc and initialize this at startup time,
+  // but that seems more trouble than it's worth at
+  // the moment.
+  PfnGetRealNetworkInterfaces pfn =
+    determineGetRealNetworkInterfacesFN ();
+    
+  jstring arIFName[MAX_INTERFACES];
+  InetAddress* arpInetAddress[MAX_INTERFACES];
+  ::java::util::Vector* ht = new ::java::util::Vector ();
+  
+  int nNbInterfaces = (*pfn) (arIFName, arpInetAddress);
+  for (int i=0; i < nNbInterfaces; ++i) 
+    {
+      ht->add (new java::net::NetworkInterface (arIFName[i],
+        arpInetAddress[i]));
+    }
+    
+  return ht;
+}