| /* VMInetAddress.c - Native methods for InetAddress class |
| Copyright (C) 1998, 2002, 2005, 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath 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, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| /* do not move; needed here because of some macro definitions */ |
| #include <config.h> |
| |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include <jni.h> |
| #include <jcl.h> |
| |
| #include "javanet.h" |
| |
| #include "target_native.h" |
| #ifndef WITHOUT_NETWORK |
| #include "target_native_network.h" |
| #endif /* WITHOUT_NETWORK */ |
| |
| #include "java_net_VMInetAddress.h" |
| |
| /*************************************************************************/ |
| |
| /* |
| * Function to return the local hostname |
| */ |
| JNIEXPORT jstring JNICALL |
| Java_java_net_VMInetAddress_getLocalHostname (JNIEnv * env, |
| jclass class |
| __attribute__ ((__unused__))) |
| { |
| char hostname[256]; |
| int result; |
| jstring retval; |
| |
| #ifndef WITHOUT_NETWORK |
| TARGET_NATIVE_NETWORK_GET_HOSTNAME (hostname, sizeof (hostname), result); |
| if (result != TARGET_NATIVE_OK) |
| { |
| strcpy (hostname, "localhost"); |
| } |
| #else /* not WITHOUT_NETWORK */ |
| strcpy (hostname, "localhost"); |
| #endif /* not WITHOUT_NETWORK */ |
| |
| retval = (*env)->NewStringUTF (env, hostname); |
| |
| return (retval); |
| } |
| |
| /*************************************************************************/ |
| |
| /* |
| * Returns the value of the special IP address INADDR_ANY |
| */ |
| JNIEXPORT jarray JNICALL |
| Java_java_net_VMInetAddress_lookupInaddrAny (JNIEnv * env, |
| jclass class |
| __attribute__ ((__unused__))) |
| { |
| jarray IParray; |
| jbyte *octets; |
| |
| /* Allocate an array for the IP address */ |
| IParray = (*env)->NewByteArray (env, 4); |
| if (IParray == NULL) |
| { |
| JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Internal Error"); |
| return (jarray) NULL; |
| } |
| |
| /* Copy in the values */ |
| octets = (*env)->GetByteArrayElements (env, IParray, 0); |
| |
| #ifndef WITHOUT_NETWORK |
| TARGET_NATIVE_NETWORK_INT_TO_IPADDRESS_BYTES (INADDR_ANY, |
| octets[0], |
| octets[1], |
| octets[2], octets[3]); |
| (*env)->ReleaseByteArrayElements (env, IParray, octets, 0); |
| #else /* not WITHOUT_NETWORK */ |
| octets[0] = 0; |
| octets[1] = 0; |
| octets[2] = 0; |
| octets[3] = 0; |
| #endif /* not WITHOUT_NETWORK */ |
| |
| return (IParray); |
| } |
| |
| /*************************************************************************/ |
| |
| /* |
| * Function to return the canonical hostname for a given IP address passed |
| * in as a byte array |
| */ |
| JNIEXPORT jstring JNICALL |
| Java_java_net_VMInetAddress_getHostByAddr (JNIEnv * env, |
| jclass class |
| __attribute__ ((__unused__)), |
| jarray arr) |
| { |
| #ifndef WITHOUT_NETWORK |
| jbyte *octets; |
| jsize len; |
| int addr; |
| char hostname[255]; |
| int result; |
| jstring retval; |
| |
| /* Grab the byte[] array with the IP out of the input data */ |
| len = (*env)->GetArrayLength (env, arr); |
| if (len != 4) |
| { |
| JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Bad IP Address"); |
| return (jstring) NULL; |
| } |
| |
| octets = (*env)->GetByteArrayElements (env, arr, 0); |
| if (!octets) |
| { |
| JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Bad IP Address"); |
| return (jstring) NULL; |
| } |
| |
| /* Convert it to a 32 bit address */ |
| TARGET_NATIVE_NETWORK_IPADDRESS_BYTES_TO_INT (octets[0], |
| octets[1], |
| octets[2], octets[3], addr); |
| |
| /* Release some memory */ |
| (*env)->ReleaseByteArrayElements (env, arr, octets, 0); |
| |
| /* Resolve the address and return the name */ |
| TARGET_NATIVE_NETWORK_GET_HOSTNAME_BY_ADDRESS (addr, hostname, |
| sizeof (hostname), result); |
| if (result != TARGET_NATIVE_OK) |
| { |
| JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, |
| TARGET_NATIVE_LAST_ERROR_STRING ()); |
| return (jstring) NULL; |
| } |
| |
| retval = (*env)->NewStringUTF (env, hostname); |
| |
| return (retval); |
| #else /* not WITHOUT_NETWORK */ |
| return (jstring) NULL; |
| #endif /* not WITHOUT_NETWORK */ |
| } |
| |
| /*************************************************************************/ |
| |
| JNIEXPORT jobjectArray JNICALL |
| Java_java_net_VMInetAddress_getHostByName (JNIEnv * env, |
| jclass class |
| __attribute__ ((__unused__)), |
| jstring host) |
| { |
| #ifndef WITHOUT_NETWORK |
| const char *hostname; |
| /* FIXME: limitation of max. 64 addresses - how to make it more flexibale? */ |
| int addresses[64]; |
| jsize addresses_count; |
| int result; |
| jclass arr_class; |
| jobjectArray addrs; |
| int i; |
| jbyte *octets; |
| jarray ret_octets; |
| int max_addresses; |
| |
| /* Grab the hostname string */ |
| hostname = (*env)->GetStringUTFChars (env, host, 0); |
| if (!hostname) |
| { |
| JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Null hostname"); |
| return (jobjectArray) NULL; |
| } |
| |
| max_addresses = sizeof (addresses) / sizeof (addresses[0]); |
| TARGET_NATIVE_NETWORK_GET_HOSTNAME_BY_NAME (hostname, |
| addresses, |
| max_addresses, |
| addresses_count, result); |
| if (result != TARGET_NATIVE_OK) |
| { |
| JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, (char *) hostname); |
| return (jobjectArray) NULL; |
| } |
| (*env)->ReleaseStringUTFChars (env, host, hostname); |
| |
| arr_class = (*env)->FindClass (env, "[B"); |
| if (!arr_class) |
| { |
| JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Internal Error"); |
| return (jobjectArray) NULL; |
| } |
| |
| addrs = (*env)->NewObjectArray (env, addresses_count, arr_class, 0); |
| if (!addrs) |
| { |
| JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Internal Error"); |
| return (jobjectArray) NULL; |
| } |
| |
| /* Now loop and copy in each address */ |
| for (i = 0; i < addresses_count; i++) |
| { |
| ret_octets = (*env)->NewByteArray (env, 4); |
| if (!ret_octets) |
| { |
| JCL_ThrowException (env, UNKNOWN_HOST_EXCEPTION, "Internal Error"); |
| return (jobjectArray) NULL; |
| } |
| |
| octets = (*env)->GetByteArrayElements (env, ret_octets, 0); |
| |
| TARGET_NATIVE_NETWORK_INT_TO_IPADDRESS_BYTES (addresses[i], |
| octets[0], |
| octets[1], |
| octets[2], octets[3]); |
| |
| (*env)->ReleaseByteArrayElements (env, ret_octets, octets, 0); |
| |
| (*env)->SetObjectArrayElement (env, addrs, i, ret_octets); |
| } |
| |
| return (addrs); |
| #else /* not WITHOUT_NETWORK */ |
| return (jobjectArray) NULL; |
| #endif /* not WITHOUT_NETWORK */ |
| } |
| |
| /* end of file */ |