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src/java.base/share/native/libnet/InetAddress.c

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 1 /*
 2  * Copyright (c) 1997, 2016, 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 jfieldID ia_preferIPv6AddressID;
43 
44 static int ia_initialized = 0;
45 
46 /*
47  * Class:     java_net_InetAddress
48  * Method:    init
49  * Signature: ()V
50  */
51 JNIEXPORT void JNICALL
52 Java_java_net_InetAddress_init(JNIEnv *env, jclass cls) {
53     if (!ia_initialized) {
54         jclass c = (*env)->FindClass(env,"java/net/InetAddress");
55         CHECK_NULL(c);
56         ia_class = (*env)->NewGlobalRef(env, c);
57         CHECK_NULL(ia_class);
58         c = (*env)->FindClass(env,"java/net/InetAddress$InetAddressHolder");
59         CHECK_NULL(c);
60         iac_class = (*env)->NewGlobalRef(env, c);
61         CHECK_NULL(iac_class);
62         ia_holderID = (*env)->GetFieldID(env, ia_class, "holder", "Ljava/net/InetAddress$InetAddressHolder;");
63         CHECK_NULL(ia_holderID);
64         ia_preferIPv6AddressID = (*env)->GetStaticFieldID(env, ia_class, "preferIPv6Address", "I");
65         CHECK_NULL(ia_preferIPv6AddressID);
66 
67         iac_addressID = (*env)->GetFieldID(env, iac_class, "address", "I");
68         CHECK_NULL(iac_addressID);
69         iac_familyID = (*env)->GetFieldID(env, iac_class, "family", "I");
70         CHECK_NULL(iac_familyID);
71         iac_hostNameID = (*env)->GetFieldID(env, iac_class, "hostName", "Ljava/lang/String;");
72         CHECK_NULL(iac_hostNameID);
73         iac_origHostNameID = (*env)->GetFieldID(env, iac_class, "originalHostName", "Ljava/lang/String;");
74         CHECK_NULL(iac_origHostNameID);
75         ia_initialized = 1;
76     }
77 }










 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 }
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