libjava/java/net/natVMInetAddressWin32.cc

   1 /* Copyright (C) 2003, 2006 Free Software Foundation
   2
   3    This file is part of libgcj.
   4
   5 This software is copyrighted work licensed under the terms of the
   6 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   7 details.  */
   8
   9 #include <config.h>
  10 #include <platform.h>
  11
  12 #undef STRICT
  13
  14 #include <java/net/VMInetAddress.h>
  15 #include <java/net/UnknownHostException.h>
  16
  17 jstring
  18 java::net::VMInetAddress::getLocalHostname ()
  19 {
  20   char buffer[400];
  21   if (gethostname (buffer, sizeof(buffer)))
  22     return NULL;
  23   // It is admittedly non-optimal to convert the hostname to Unicode
  24   // only to convert it back in getByName, but simplicity wins.
  25   return JvNewStringUTF (buffer);
  26 }
  27
  28 jbyteArray
  29 java::net::VMInetAddress::lookupInaddrAny ()
  30 {
  31   unsigned long laddr = INADDR_ANY;
  32   char *bytes = (char *) &laddr;
  33   int blen = sizeof (laddr);
  34   jbyteArray result = JvNewByteArray (blen);
  35   memcpy (elements (result), bytes, blen);
  36   return result;
  37 }
  38
  39 jstring
  40 java::net::VMInetAddress::getHostByAddr (jbyteArray addr)
  41 {
  42   struct hostent *hptr = NULL;
  43   char *bytes = (char*) elements (addr);
  44   int len = addr->length;
  45   int type;
  46   char *val;
  47   if (len == 4)
  48     {
  49       val = bytes;
  50       type = AF_INET;
  51     }
  52 #ifdef HAVE_INET6
  53   else if (len == 16)
  54     {
  55       val = (char *) &bytes;
  56       type = AF_INET6;
  57     }
  58 #endif /* HAVE_INET6 */
  59   else
  60     JvFail ("unrecognized size");
  61
  62   // FIXME: this is insufficient if some other piece of code calls
  63   // this gethostbyaddr.
  64   JvSynchronize sync (&java::net::VMInetAddress::class$);
  65   hptr = gethostbyaddr (val, len, type);
  66
  67   if (hptr == NULL)
  68     throw new java::net::UnknownHostException ();
  69
  70   return JvNewStringUTF (hptr->h_name);
  71 }
  72
  73 JArray<jbyteArray> *
  74 java::net::VMInetAddress::getHostByName (jstring host)
  75 {
  76   struct hostent *hptr = NULL;
  77   JV_TEMP_UTF_STRING (hostname, host);
  78
  79   // FIXME: this is insufficient if some other piece of code calls
  80   // this gethostbyname.
  81   JvSynchronize sync (&java::net::VMInetAddress::class$);
  82   hptr = gethostbyname (hostname);
  83
  84   if (hptr == NULL)
  85     throw new java::net::UnknownHostException (host);
  86
  87   int count = 0;
  88   char ** ptr = hptr->h_addr_list;
  89   while (*ptr++)  count++;
  90
  91   JArray<jbyteArray> *result =
  92     (JArray<jbyteArray> *) _Jv_NewObjectArray (
  93       count, _Jv_GetArrayClass(JvPrimClass(byte), NULL), NULL);
  94   jbyteArray* addrs = elements (result);
  95
  96   for (int i = 0; i < count; i++)
  97     {
  98       addrs[i] = JvNewByteArray (hptr->h_length);
  99       memcpy (elements (addrs[i]), hptr->h_addr_list[i], hptr->h_length);
 100     }
 101   return result;
 102 }
 103
 104 jbyteArray
 105 java::net::VMInetAddress::aton (jstring host)
 106 {
 107   JV_TEMP_UTF_STRING (hostname, host);
 108   char* bytes = NULL;
 109   int blen = 0;
 110   unsigned long laddr = inet_addr (hostname);
 111   if (laddr != INADDR_NONE)
 112     {
 113       bytes = (char *) &laddr;
 114       blen = 4;
 115     }
 116   if (blen == 0)
 117     return NULL;
 118   jbyteArray result = JvNewByteArray (blen);
 119   memcpy (elements (result), bytes, blen);
 120   return result;
 121 }