1/*
2 * Copyright (c) 1997, 2019, 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 * i.e. psi_timeoutID is PlainSocketImpl's timeout field's ID.
49 */
50extern jclass ia_class;
51extern jfieldID iac_addressID;
52extern jfieldID iac_familyID;
53extern jfieldID iac_hostNameID;
54extern jfieldID iac_origHostNameID;
55extern jfieldID ia_preferIPv6AddressID;
56
57JNIEXPORT void JNICALL initInetAddressIDs(JNIEnv *env);
58
59/** (Inet6Address accessors)
60 * set_ methods return JNI_TRUE on success JNI_FALSE on error
61 * get_ methods that return int/boolean, return -1 on error
62 * get_ methods that return objects return NULL on error.
63 */
64extern jobject getInet6Address_scopeifname(JNIEnv *env, jobject ia6Obj);
65extern jboolean setInet6Address_scopeifname(JNIEnv *env, jobject ia6Obj, jobject scopeifname);
66extern jboolean getInet6Address_scopeid_set(JNIEnv *env, jobject ia6Obj);
67extern unsigned int getInet6Address_scopeid(JNIEnv *env, jobject ia6Obj);
68extern jboolean setInet6Address_scopeid(JNIEnv *env, jobject ia6Obj, int scopeid);
69extern jboolean getInet6Address_ipaddress(JNIEnv *env, jobject ia6Obj, char *dest);
70extern jboolean setInet6Address_ipaddress(JNIEnv *env, jobject ia6Obj, char *address);
71
72extern void setInetAddress_addr(JNIEnv *env, jobject iaObj, int address);
73extern void setInetAddress_family(JNIEnv *env, jobject iaObj, int family);
74extern void setInetAddress_hostName(JNIEnv *env, jobject iaObj, jobject h);
75extern int getInetAddress_addr(JNIEnv *env, jobject iaObj);
76extern int getInetAddress_family(JNIEnv *env, jobject iaObj);
77extern jobject getInetAddress_hostName(JNIEnv *env, jobject iaObj);
78
79extern jclass ia4_class;
80extern jmethodID ia4_ctrID;
81
82/* NetworkInterface fields */
83extern jclass ni_class;
84extern jfieldID ni_nameID;
85extern jfieldID ni_indexID;
86extern jfieldID ni_addrsID;
87extern jfieldID ni_descID;
88extern jmethodID ni_ctrID;
89
90/* PlainSocketImpl fields */
91extern jfieldID psi_timeoutID;
92extern jfieldID psi_fdID;
93extern jfieldID psi_addressID;
94extern jfieldID psi_portID;
95extern jfieldID psi_localportID;
96
97/* DatagramPacket fields */
98extern jfieldID dp_addressID;
99extern jfieldID dp_portID;
100extern jfieldID dp_bufID;
101extern jfieldID dp_offsetID;
102extern jfieldID dp_lengthID;
103extern jfieldID dp_bufLengthID;
104
105/* Inet6Address fields */
106extern jclass ia6_class;
107extern jfieldID ia6_holder6ID;
108extern jfieldID ia6_ipaddressID;
109extern jfieldID ia6_scopeidID;
110extern jfieldID ia6_scopeidsetID;
111extern jfieldID ia6_scopeifnameID;
112extern jmethodID ia6_ctrID;
113
114/************************************************************************
115 * Utilities
116 */
117JNIEXPORT void JNICALL Java_java_net_InetAddress_init(JNIEnv *env, jclass cls);
118JNIEXPORT void JNICALL Java_java_net_Inet4Address_init(JNIEnv *env, jclass cls);
119JNIEXPORT void JNICALL Java_java_net_Inet6Address_init(JNIEnv *env, jclass cls);
120JNIEXPORT void JNICALL Java_java_net_NetworkInterface_init(JNIEnv *env, jclass cls);
121
122JNIEXPORT void JNICALL NET_ThrowNew(JNIEnv *env, int errorNum, char *msg);
123
124void NET_ThrowCurrent(JNIEnv *env, char *msg);
125
126jfieldID NET_GetFileDescriptorID(JNIEnv *env);
127
128JNIEXPORT jint JNICALL ipv4_available();
129JNIEXPORT jint JNICALL ipv6_available();
130
131JNIEXPORT jint JNICALL reuseport_available();
132
133/**
134 * This function will fill a SOCKETADDRESS structure from an InetAddress
135 * object.
136 *
137 * The parameter 'sa' must point to valid storage of size
138 * 'sizeof(SOCKETADDRESS)'.
139 *
140 * The parameter 'len' is a pointer to an int and is used for returning
141 * the actual sockaddr length, e.g. 'sizeof(struct sockaddr_in)' or
142 * 'sizeof(struct sockaddr_in6)'.
143 *
144 * If the type of the InetAddress object is IPv6, the function will fill a
145 * sockaddr_in6 structure. IPv6 must be available in that case, otherwise an
146 * exception is thrown.
147 * In the case of an IPv4 InetAddress, when IPv6 is available and
148 * v4MappedAddress is TRUE, this method will fill a sockaddr_in6 structure
149 * containing an IPv4 mapped IPv6 address. Otherwise a sockaddr_in
150 * structure will be filled.
151 */
152JNIEXPORT int JNICALL
153NET_InetAddressToSockaddr(JNIEnv *env, jobject iaObj, int port,
154 SOCKETADDRESS *sa, int *len,
155 jboolean v4MappedAddress);
156
157JNIEXPORT jobject JNICALL
158NET_SockaddrToInetAddress(JNIEnv *env, SOCKETADDRESS *sa, int *port);
159
160void platformInit();
161
162void parseExclusiveBindProperty(JNIEnv *env);
163
164JNIEXPORT jint JNICALL NET_GetPortFromSockaddr(SOCKETADDRESS *sa);
165
166JNIEXPORT jboolean JNICALL
167NET_SockaddrEqualsInetAddress(JNIEnv *env, SOCKETADDRESS *sa, jobject iaObj);
168
169int NET_IsIPv4Mapped(jbyte* caddr);
170
171int NET_IPv4MappedToIPv4(jbyte* caddr);
172
173int NET_IsEqual(jbyte* caddr1, jbyte* caddr2);
174
175int NET_IsZeroAddr(jbyte* caddr);
176
177/* Socket operations
178 *
179 * These work just like the system calls, except that they may do some
180 * platform-specific pre/post processing of the arguments and/or results.
181 */
182
183JNIEXPORT int JNICALL
184NET_SocketAvailable(int fd, int *pbytes);
185
186JNIEXPORT int JNICALL
187NET_GetSockOpt(int fd, int level, int opt, void *result, int *len);
188
189JNIEXPORT int JNICALL
190NET_SetSockOpt(int fd, int level, int opt, const void *arg, int len);
191
192JNIEXPORT int JNICALL
193NET_Bind(int fd, SOCKETADDRESS *sa, int len);
194
195JNIEXPORT int JNICALL
196NET_MapSocketOption(jint cmd, int *level, int *optname);
197
198JNIEXPORT int JNICALL
199NET_MapSocketOptionV6(jint cmd, int *level, int *optname);
200
201JNIEXPORT jint JNICALL
202NET_EnableFastTcpLoopback(int fd);
203
204unsigned short in_cksum(unsigned short *addr, int len);
205
206jint NET_Wait(JNIEnv *env, jint fd, jint flags, jint timeout);
207
208#endif /* NET_UTILS_H */
209