NetworkInterface.java: New file.

2002-09-17  Michael Koch  <konqueror@gmx.de>

	* java/net/NetworkInterface.java: New file.
	* java/net/natNetworkInterface.java: New file.
	* configure.in: Added check for net/if.h.
	* configure: Regenerated.
	* Makefile.am
	(ordinary_java_source_files): Added NetworkInterface.java.
	(nat_source_files): Added natNetworkInterface.cc.
	* Makefile.in: Regenerated.

From-SVN: r57234

libjava/java/net/natNetworkInterface.cc

@@ -0,0 +1,144 @@
+// natNetworkInterface.cc
+
+/* Copyright (C) 2002  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>
+
+#ifdef WIN32
+
+#include <windows.h>
+#include <winsock.h>
+#undef STRICT
+
+#else /* WIN32 */
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+
+#include <sys/param.h>
+#include <sys/types.h>
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+#define BSD_COMP /* Get FIONREAD on Solaris2. */
+#include <sys/ioctl.h>
+#endif
+#ifdef HAVE_NET_IF_H
+#include <net/if.h>
+#endif
+
+#endif /* WIN32 */
+
+#include <gcj/cni.h>
+#include <jvm.h>
+#include <java/net/NetworkInterface.h>
+#include <java/net/Inet4Address.h>
+#include <java/net/Inet6Address.h>
+#include <java/net/SocketException.h>
+#include <java/util/Vector.h>
+
+#ifdef DISABLE_JAVA_NET
+
+::java::util::Vector*
+java::net::NetworkInterface::getRealNetworkInterfaces ()
+{
+  ::java::util::Vector* ht = new ::java::util::Vector();
+  return ht;
+}
+
+#else /* DISABLE_JAVA_NET */
+
+::java::util::Vector*
+java::net::NetworkInterface::getRealNetworkInterfaces ()
+{
+#if 0
+  int fd;
+  int num_interfaces = 0;
+  struct ifconf if_data;
+  struct ifreq* if_record;
+  ::java::util::Vector* ht = new ::java::util::Vector ();
+
+  if_data.ifc_len = 0;
+  if_data.ifc_buf = NULL;
+
+  // Open a (random) socket to have a file descriptor for the ioctl calls.
+  fd = ::socket (PF_INET, SOCK_DGRAM, htons (IPPROTO_IP));
+
+  if (fd < 0)
+    throw new ::java::net::SocketException;
+
+  // Get all interfaces. If not enough buffers are available try it
+  // with a bigger buffer size.
+  do
+    {
+      num_interfaces += 16;
+      
+      if_data.ifc_len = sizeof (struct ifreq) * num_interfaces;
+      if_data.ifc_buf =
+	(char*) _Jv_Realloc (if_data.ifc_buf, if_data.ifc_len);
+
+      // Try to get all local interfaces.
+      if (::ioctl (fd, SIOCGIFCONF, &if_data) < 0)
+        throw new java::net::SocketException;
+    }
+  while (if_data.ifc_len >= (sizeof (struct ifreq) * num_interfaces));
+
+  // Get addresses of all interfaces.
+  if_record = if_data.ifc_req;
+  for (int n = 0; n < if_data.ifc_len; n += sizeof (struct ifreq))
+    {
+      struct ifreq ifr;
+      
+      memset (&ifr, 0, sizeof (ifr));
+      strcpy (ifr.ifr_name, if_record->ifr_name);
+
+      // Try to get the IPv4-address of the local interface
+      if (::ioctl (fd, SIOCGIFADDR, &ifr) < 0)
+	throw new java::net::SocketException;
+
+      int len = 4;
+      struct sockaddr_in sa = *((sockaddr_in*) &(ifr.ifr_addr));
+
+      jbyteArray baddr = JvNewByteArray (len);
+      memcpy (elements (baddr), &(sa.sin_addr), len);
+      jstring if_name = JvNewStringLatin1 (if_record->ifr_name);
+      Inet4Address* address =
+        new java::net::Inet4Address (baddr, JvNewStringLatin1 (""));
+      ht->add (new NetworkInterface (if_name, address));
+      if_record++;
+    }
+
+#ifdef HAVE_INET6
+      // FIXME: read /proc/net/if_inet6
+#endif
+
+  _Jv_Free (if_data.ifc_buf);
+  
+  if (fd >= 0)
+    ::close (fd);
+  
+  return ht;
+#endif
+}
+
+#endif // DISABLE_JAVA_NET //