1 /* 2 * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 #include <string.h> 27 28 #include "java_net_InetAddress.h" 29 #include "net_util.h" 30 31 /************************************************************************ 32 * InetAddress 33 */ 34 35 jclass ia_class; 36 jclass iac_class; 37 jfieldID ia_holderID; 38 jfieldID iac_addressID; 39 jfieldID iac_familyID; 40 jfieldID iac_hostNameID; 41 jfieldID iac_origHostNameID; 42 43 static int ia_initialized = 0; 44 45 /* 46 * Class: java_net_InetAddress 47 * Method: init 48 * Signature: ()V 49 */ 50 JNIEXPORT void JNICALL 51 Java_java_net_InetAddress_init(JNIEnv *env, jclass cls) { 52 if (!ia_initialized) { 53 jclass c = (*env)->FindClass(env,"java/net/InetAddress"); 54 CHECK_NULL(c); 55 ia_class = (*env)->NewGlobalRef(env, c); 56 CHECK_NULL(ia_class); 57 c = (*env)->FindClass(env,"java/net/InetAddress$InetAddressHolder"); 58 CHECK_NULL(c); 59 iac_class = (*env)->NewGlobalRef(env, c); 60 CHECK_NULL(iac_class); 61 ia_holderID = (*env)->GetFieldID(env, ia_class, "holder", "Ljava/net/InetAddress$InetAddressHolder;"); 62 CHECK_NULL(ia_holderID); 63 64 iac_addressID = (*env)->GetFieldID(env, iac_class, "address", "I"); 65 CHECK_NULL(iac_addressID); 66 iac_familyID = (*env)->GetFieldID(env, iac_class, "family", "I"); 67 CHECK_NULL(iac_familyID); 68 iac_hostNameID = (*env)->GetFieldID(env, iac_class, "hostName", "Ljava/lang/String;"); 69 CHECK_NULL(iac_hostNameID); 70 iac_origHostNameID = (*env)->GetFieldID(env, iac_class, "originalHostName", "Ljava/lang/String;"); 71 CHECK_NULL(iac_origHostNameID); 72 ia_initialized = 1; 73 } 74 } 75 76 /* 77 * Class: java_net_InetAddress 78 * Method: isIPv4Available 79 */ 80 JNIEXPORT jboolean JNICALL 81 Java_java_net_InetAddress_isIPv4Available(JNIEnv *env, jclass clazz) { 82 return ipv4_available(); 83 }