1 /* 2 * Copyright (c) 1998, 2013, 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 "jni.h" 27 #include "jvm.h" 28 #include "jni_util.h" 29 #include "net_util.h" 30 31 int IPv6_supported() ; 32 33 static int IPv6_available; 34 35 JNIEXPORT jint JNICALL ipv6_available() 36 { 37 return IPv6_available ; 38 } 39 40 JNIEXPORT jint JNICALL 41 JNI_OnLoad(JavaVM *vm, void *reserved) 42 { 43 JNIEnv *env; 44 jclass iCls; 45 jmethodID mid; 46 jstring s; 47 jint preferIPv4Stack; 48 49 if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_2) != JNI_OK) { 50 return JNI_EVERSION; /* JNI version not supported */ 51 } 52 53 iCls = (*env)->FindClass(env, "java/lang/Boolean"); 54 CHECK_NULL_RETURN(iCls, JNI_VERSION_1_2); 55 mid = (*env)->GetStaticMethodID(env, iCls, "getBoolean", "(Ljava/lang/String;)Z"); 56 CHECK_NULL_RETURN(mid, JNI_VERSION_1_2); 57 s = (*env)->NewStringUTF(env, "java.net.preferIPv4Stack"); 58 CHECK_NULL_RETURN(s, JNI_VERSION_1_2); 59 preferIPv4Stack = (*env)->CallStaticBooleanMethod(env, iCls, mid, s); 60 61 /* | 1 /* 2 * Copyright (c) 1998, 2015, 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 "jni.h" 27 #include "jvm.h" 28 #include "jni_util.h" 29 #include "net_util.h" 30 31 int IPv6_supported() ; 32 33 static int IPv6_available; 34 35 JNIEXPORT jint JNICALL ipv6_available() 36 { 37 return IPv6_available ; 38 } 39 40 JNIEXPORT jint JNICALL 41 DEF_JNI_OnLoad(JavaVM *vm, void *reserved) 42 { 43 JNIEnv *env; 44 jclass iCls; 45 jmethodID mid; 46 jstring s; 47 jint preferIPv4Stack; 48 49 if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_2) != JNI_OK) { 50 return JNI_EVERSION; /* JNI version not supported */ 51 } 52 53 iCls = (*env)->FindClass(env, "java/lang/Boolean"); 54 CHECK_NULL_RETURN(iCls, JNI_VERSION_1_2); 55 mid = (*env)->GetStaticMethodID(env, iCls, "getBoolean", "(Ljava/lang/String;)Z"); 56 CHECK_NULL_RETURN(mid, JNI_VERSION_1_2); 57 s = (*env)->NewStringUTF(env, "java.net.preferIPv4Stack"); 58 CHECK_NULL_RETURN(s, JNI_VERSION_1_2); 59 preferIPv4Stack = (*env)->CallStaticBooleanMethod(env, iCls, mid, s); 60 61 /* |