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 #ifndef NET_UTILS_H
27 #define NET_UTILS_H
28
29 #include "jvm.h"
30 #include "jni_util.h"
31 #include "net_util_md.h"
32
33 /************************************************************************
34 * Macros and misc constants
35 */
36
37 #define MAX_PACKET_LEN 65536
38
39 #define NET_WAIT_READ 0x01
40 #define NET_WAIT_WRITE 0x02
41 #define NET_WAIT_CONNECT 0x04
42
43 /************************************************************************
44 * Cached field IDs
45 *
46 * The naming convention for field IDs is
47 * <class abbrv>_<fieldName>ID
48 */
49 extern jclass ia_class;
50 extern jfieldID iac_addressID;
51 extern jfieldID iac_familyID;
52 extern jfieldID iac_hostNameID;
53 extern jfieldID iac_origHostNameID;
54 extern jfieldID ia_preferIPv6AddressID;
55
56 JNIEXPORT void JNICALL initInetAddressIDs(JNIEnv *env);
57
58 /** (Inet6Address accessors)
59 * set_ methods return JNI_TRUE on success JNI_FALSE on error
60 * get_ methods that return int/boolean, return -1 on error
61 * get_ methods that return objects return NULL on error.
62 */
63 extern jboolean setInet6Address_scopeifname(JNIEnv *env, jobject ia6Obj, jobject scopeifname);
64 extern unsigned int getInet6Address_scopeid(JNIEnv *env, jobject ia6Obj);
65 extern jboolean setInet6Address_scopeid(JNIEnv *env, jobject ia6Obj, int scopeid);
66 extern jboolean getInet6Address_ipaddress(JNIEnv *env, jobject ia6Obj, char *dest);
67 extern jboolean setInet6Address_ipaddress(JNIEnv *env, jobject ia6Obj, char *address);
68
69 extern void setInetAddress_addr(JNIEnv *env, jobject iaObj, int address);
70 extern void setInetAddress_family(JNIEnv *env, jobject iaObj, int family);
71 extern void setInetAddress_hostName(JNIEnv *env, jobject iaObj, jobject h);
72 extern int getInetAddress_addr(JNIEnv *env, jobject iaObj);
73 extern int getInetAddress_family(JNIEnv *env, jobject iaObj);
74
75 extern jclass ia4_class;
76 extern jmethodID ia4_ctrID;
77
78 /* NetworkInterface fields */
79 extern jclass ni_class;
80 extern jfieldID ni_nameID;
81 extern jfieldID ni_indexID;
82 extern jfieldID ni_addrsID;
83 extern jfieldID ni_descID;
84 extern jmethodID ni_ctrID;
85
86 /* DatagramPacket fields */
87 extern jfieldID dp_addressID;
88 extern jfieldID dp_portID;
89 extern jfieldID dp_bufID;
90 extern jfieldID dp_offsetID;
91 extern jfieldID dp_lengthID;
92 extern jfieldID dp_bufLengthID;
93
94 /* Inet6Address fields */
95 extern jclass ia6_class;
96 extern jfieldID ia6_holder6ID;
97 extern jfieldID ia6_ipaddressID;
98 extern jfieldID ia6_scopeidID;
99 extern jfieldID ia6_scopeidsetID;
100 extern jfieldID ia6_scopeifnameID;
101 extern jmethodID ia6_ctrID;
102
103 /************************************************************************
104 * Utilities
105 */
106 JNIEXPORT void JNICALL Java_java_net_InetAddress_init(JNIEnv *env, jclass cls);
107 JNIEXPORT void JNICALL Java_java_net_Inet4Address_init(JNIEnv *env, jclass cls);
108 JNIEXPORT void JNICALL Java_java_net_Inet6Address_init(JNIEnv *env, jclass cls);
109 JNIEXPORT void JNICALL Java_java_net_NetworkInterface_init(JNIEnv *env, jclass cls);
110
111 JNIEXPORT void JNICALL NET_ThrowNew(JNIEnv *env, int errorNum, char *msg);
112
113 void NET_ThrowCurrent(JNIEnv *env, char *msg);
114
115 jfieldID NET_GetFileDescriptorID(JNIEnv *env);
116
117 JNIEXPORT jint JNICALL ipv4_available();
118 JNIEXPORT jint JNICALL ipv6_available();
119
120 JNIEXPORT jint JNICALL reuseport_available();
121
122 /**
123 * This function will fill a SOCKETADDRESS structure from an InetAddress
124 * object.
125 *
126 * The parameter 'sa' must point to valid storage of size
127 * 'sizeof(SOCKETADDRESS)'.
128 *
129 * The parameter 'len' is a pointer to an int and is used for returning
130 * the actual sockaddr length, e.g. 'sizeof(struct sockaddr_in)' or
131 * 'sizeof(struct sockaddr_in6)'.
132 *
133 * If the type of the InetAddress object is IPv6, the function will fill a
134 * sockaddr_in6 structure. IPv6 must be available in that case, otherwise an
135 * exception is thrown.
136 * In the case of an IPv4 InetAddress, when IPv6 is available and
137 * v4MappedAddress is TRUE, this method will fill a sockaddr_in6 structure
138 * containing an IPv4 mapped IPv6 address. Otherwise a sockaddr_in
139 * structure will be filled.
140 */
141 JNIEXPORT int JNICALL
142 NET_InetAddressToSockaddr(JNIEnv *env, jobject iaObj, int port,
143 SOCKETADDRESS *sa, int *len,
144 jboolean v4MappedAddress);
145
146 JNIEXPORT jobject JNICALL
147 NET_SockaddrToInetAddress(JNIEnv *env, SOCKETADDRESS *sa, int *port);
148
149 void platformInit();
150
151 JNIEXPORT jint JNICALL NET_GetPortFromSockaddr(SOCKETADDRESS *sa);
152
153 JNIEXPORT jboolean JNICALL
154 NET_SockaddrEqualsInetAddress(JNIEnv *env, SOCKETADDRESS *sa, jobject iaObj);
155
156 int NET_IsIPv4Mapped(jbyte* caddr);
157
158 int NET_IPv4MappedToIPv4(jbyte* caddr);
159
160 int NET_IsEqual(jbyte* caddr1, jbyte* caddr2);
161
162 int NET_IsZeroAddr(jbyte* caddr);
163
164 /* Socket operations
165 *
166 * These work just like the system calls, except that they may do some
167 * platform-specific pre/post processing of the arguments and/or results.
168 */
169
170 JNIEXPORT int JNICALL
171 NET_SocketAvailable(int fd, int *pbytes);
172
173 JNIEXPORT int JNICALL
174 NET_GetSockOpt(int fd, int level, int opt, void *result, int *len);
175
176 JNIEXPORT int JNICALL
177 NET_SetSockOpt(int fd, int level, int opt, const void *arg, int len);
178
179 JNIEXPORT int JNICALL
180 NET_Bind(int fd, SOCKETADDRESS *sa, int len);
181
182 JNIEXPORT int JNICALL
183 NET_MapSocketOption(jint cmd, int *level, int *optname);
184
185 JNIEXPORT int JNICALL
186 NET_MapSocketOptionV6(jint cmd, int *level, int *optname);
187
188 JNIEXPORT jint JNICALL
189 NET_EnableFastTcpLoopback(int fd);
190
191 unsigned short in_cksum(unsigned short *addr, int len);
192
193 jint NET_Wait(JNIEnv *env, jint fd, jint flags, jint timeout);
194
195 #endif /* NET_UTILS_H */
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