diff options
Diffstat (limited to 'libjava/classpath/native/jni/java-net/java_net_VMInetAddress.c')
| -rw-r--r-- | libjava/classpath/native/jni/java-net/java_net_VMInetAddress.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/libjava/classpath/native/jni/java-net/java_net_VMInetAddress.c b/libjava/classpath/native/jni/java-net/java_net_VMInetAddress.c new file mode 100644 index 00000000000..d33265cff7e --- /dev/null +++ b/libjava/classpath/native/jni/java-net/java_net_VMInetAddress.c @@ -0,0 +1,282 @@ +/* VMInetAddress.c - Native methods for InetAddress class + Copyright (C) 1998, 2002, 2005 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 <assert.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; + + assert (env != NULL); + assert ((*env) != NULL); + +#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; + + assert (env != NULL); + assert ((*env) != NULL); + + /* 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; + + assert (env != NULL); + assert ((*env) != NULL); + + /* 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, "Bad IP address"); + 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; + + assert (env != NULL); + assert ((*env) != NULL); + + /* 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 */ |
