Initial revision
From-SVN: r102074
This commit is contained in:
Tom Tromey
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/* VMInetAddress.c - Native methods for InetAddress class
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Copyright (C) 1998, 2002, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath 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 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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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 GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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/* do not move; needed here because of some macro definitions */
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#include <config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <jni.h>
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#include <jcl.h>
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#include "javanet.h"
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#include "target_native.h"
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#ifndef WITHOUT_NETWORK
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#include "target_native_network.h"
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#endif /* WITHOUT_NETWORK */
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#include "java_net_VMInetAddress.h"
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/*************************************************************************/
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/*
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* Function to return the local hostname
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*/
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JNIEXPORT jstring JNICALL
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Java_java_net_VMInetAddress_getLocalHostname (JNIEnv * env,
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jclass class
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__attribute__ ((__unused__)))
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{
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char hostname[256];
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int result;
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jstring retval;
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assert (env != NULL);
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assert ((*env) != NULL);
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#ifndef WITHOUT_NETWORK
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TARGET_NATIVE_NETWORK_GET_HOSTNAME (hostname, sizeof (hostname), result);
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if (result != TARGET_NATIVE_OK)
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{
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strcpy (hostname, "localhost");
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}
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#else /* not WITHOUT_NETWORK */
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strcpy (hostname, "localhost");
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#endif /* not WITHOUT_NETWORK */
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retval = (*env)->NewStringUTF (env, hostname);
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return (retval);
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}
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/*************************************************************************/
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/*
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* Returns the value of the special IP address INADDR_ANY
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*/
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JNIEXPORT jarray JNICALL
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Java_java_net_VMInetAddress_lookupInaddrAny (JNIEnv * env,
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jclass class
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__attribute__ ((__unused__)))
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{
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jarray IParray;
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jbyte *octets;
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assert (env != NULL);
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assert ((*env) != NULL);
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/* Allocate an array for the IP address */
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IParray = (*env)->NewByteArray (env, 4);
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if (IParray == NULL)
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{
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JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Internal Error");
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return (jarray) NULL;
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}
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/* Copy in the values */
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octets = (*env)->GetByteArrayElements (env, IParray, 0);
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#ifndef WITHOUT_NETWORK
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TARGET_NATIVE_NETWORK_INT_TO_IPADDRESS_BYTES (INADDR_ANY,
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octets[0],
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octets[1],
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octets[2], octets[3]);
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(*env)->ReleaseByteArrayElements (env, IParray, octets, 0);
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#else /* not WITHOUT_NETWORK */
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octets[0] = 0;
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octets[1] = 0;
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octets[2] = 0;
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octets[3] = 0;
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#endif /* not WITHOUT_NETWORK */
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return (IParray);
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}
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/*************************************************************************/
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/*
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* Function to return the canonical hostname for a given IP address passed
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* in as a byte array
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*/
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JNIEXPORT jstring JNICALL
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Java_java_net_VMInetAddress_getHostByAddr (JNIEnv * env,
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jclass class
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__attribute__ ((__unused__)),
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jarray arr)
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{
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#ifndef WITHOUT_NETWORK
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jbyte *octets;
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jsize len;
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int addr;
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char hostname[255];
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int result;
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jstring retval;
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assert (env != NULL);
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assert ((*env) != NULL);
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/* Grab the byte[] array with the IP out of the input data */
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len = (*env)->GetArrayLength (env, arr);
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if (len != 4)
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{
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JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Bad IP Address");
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return (jstring) NULL;
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}
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octets = (*env)->GetByteArrayElements (env, arr, 0);
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if (!octets)
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{
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JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Bad IP Address");
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return (jstring) NULL;
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}
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/* Convert it to a 32 bit address */
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TARGET_NATIVE_NETWORK_IPADDRESS_BYTES_TO_INT (octets[0],
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octets[1],
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octets[2], octets[3], addr);
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/* Release some memory */
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(*env)->ReleaseByteArrayElements (env, arr, octets, 0);
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/* Resolve the address and return the name */
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TARGET_NATIVE_NETWORK_GET_HOSTNAME_BY_ADDRESS (addr, hostname,
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sizeof (hostname), result);
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if (result != TARGET_NATIVE_OK)
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{
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JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Bad IP address");
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return (jstring) NULL;
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}
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retval = (*env)->NewStringUTF (env, hostname);
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return (retval);
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#else /* not WITHOUT_NETWORK */
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return (jstring) NULL;
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#endif /* not WITHOUT_NETWORK */
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}
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/*************************************************************************/
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JNIEXPORT jobjectArray JNICALL
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Java_java_net_VMInetAddress_getHostByName (JNIEnv * env,
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jclass class
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__attribute__ ((__unused__)),
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jstring host)
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{
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#ifndef WITHOUT_NETWORK
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const char *hostname;
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/* FIXME: limitation of max. 64 addresses - how to make it more flexibale? */
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int addresses[64];
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jsize addresses_count;
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int result;
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jclass arr_class;
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jobjectArray addrs;
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int i;
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jbyte *octets;
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jarray ret_octets;
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int max_addresses;
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assert (env != NULL);
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assert ((*env) != NULL);
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/* Grab the hostname string */
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hostname = (*env)->GetStringUTFChars (env, host, 0);
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if (!hostname)
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{
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JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Null hostname");
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return (jobjectArray) NULL;
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}
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max_addresses = sizeof (addresses) / sizeof (addresses[0]);
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TARGET_NATIVE_NETWORK_GET_HOSTNAME_BY_NAME (hostname,
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addresses,
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max_addresses,
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addresses_count, result);
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if (result != TARGET_NATIVE_OK)
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{
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JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, (char *) hostname);
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return (jobjectArray) NULL;
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}
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(*env)->ReleaseStringUTFChars (env, host, hostname);
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arr_class = (*env)->FindClass (env, "[B");
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if (!arr_class)
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{
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JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Internal Error");
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return (jobjectArray) NULL;
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}
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addrs = (*env)->NewObjectArray (env, addresses_count, arr_class, 0);
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if (!addrs)
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{
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JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Internal Error");
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return (jobjectArray) NULL;
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}
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/* Now loop and copy in each address */
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for (i = 0; i < addresses_count; i++)
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{
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ret_octets = (*env)->NewByteArray (env, 4);
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if (!ret_octets)
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{
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JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Internal Error");
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return (jobjectArray) NULL;
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}
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octets = (*env)->GetByteArrayElements (env, ret_octets, 0);
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TARGET_NATIVE_NETWORK_INT_TO_IPADDRESS_BYTES (addresses[i],
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octets[0],
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octets[1],
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octets[2], octets[3]);
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(*env)->ReleaseByteArrayElements (env, ret_octets, octets, 0);
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(*env)->SetObjectArrayElement (env, addrs, i, ret_octets);
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}
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return (addrs);
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#else /* not WITHOUT_NETWORK */
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return (jobjectArray) NULL;
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#endif /* not WITHOUT_NETWORK */
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}
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/* end of file */
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