1 /*
   2  * Copyright 1997-2008 Sun Microsystems, Inc.  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.  Sun designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  22  * CA 95054 USA or visit www.sun.com if you need additional information or
  23  * have any 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 IPv4 1
  40 #define IPv6 2
  41 
  42 #define NET_ERROR(env, ex, msg) \
  43 { if (!(*env)->ExceptionOccurred(env)) JNU_ThrowByName(env, ex, msg) }
  44 
  45 #define CHECK_NULL(x) if ((x) == NULL) return;
  46 #define CHECK_NULL_RETURN(x, y) if ((x) == NULL) return y;
  47 
  48 /************************************************************************
  49  * Cached field IDs
  50  *
  51  * The naming convention for field IDs is
  52  *      <class abbrv>_<fieldName>ID
  53  * i.e. psi_timeoutID is PlainSocketImpl's timeout field's ID.
  54  */
  55 extern jclass ia_class;
  56 extern jfieldID ia_addressID;
  57 extern jfieldID ia_familyID;
  58 extern jfieldID ia_preferIPv6AddressID;
  59 extern jfieldID ia_hostNameID;
  60 
  61 extern jclass ia4_class;
  62 extern jmethodID ia4_ctrID;
  63 
  64 /* NetworkInterface fields */
  65 extern jclass ni_class;
  66 extern jfieldID ni_nameID;
  67 extern jfieldID ni_indexID;
  68 extern jfieldID ni_addrsID;
  69 extern jfieldID ni_descID;
  70 extern jmethodID ni_ctrID;
  71 
  72 /* PlainSocketImpl fields */
  73 extern jfieldID psi_timeoutID;
  74 extern jfieldID psi_fdID;
  75 extern jfieldID psi_addressID;
  76 extern jfieldID psi_portID;
  77 extern jfieldID psi_localportID;
  78 
  79 /* DatagramPacket fields */
  80 extern jfieldID dp_addressID;
  81 extern jfieldID dp_portID;
  82 extern jfieldID dp_bufID;
  83 extern jfieldID dp_offsetID;
  84 extern jfieldID dp_lengthID;
  85 extern jfieldID dp_bufLengthID;
  86 
  87 /* Inet6Address fields */
  88 extern jclass ia6_class;
  89 extern jfieldID ia6_ipaddressID;
  90 extern jfieldID ia6_scopeidID;
  91 extern jfieldID ia6_cachedscopeidID;
  92 extern jfieldID ia6_scopeidsetID;
  93 extern jfieldID ia6_scopeifnameID;
  94 extern jfieldID ia6_scopeifnamesetID;
  95 extern jmethodID ia6_ctrID;
  96 
  97 /************************************************************************
  98  *  Utilities
  99  */
 100 void init(JNIEnv *env);
 101 
 102 JNIEXPORT void JNICALL Java_java_net_InetAddress_init(JNIEnv *env, jclass cls);
 103 JNIEXPORT void JNICALL Java_java_net_Inet4Address_init(JNIEnv *env, jclass cls);
 104 JNIEXPORT void JNICALL Java_java_net_Inet6Address_init(JNIEnv *env, jclass cls);
 105 JNIEXPORT void JNICALL Java_java_net_NetworkInterface_init(JNIEnv *env, jclass cls);
 106 
 107 JNIEXPORT void JNICALL NET_ThrowNew(JNIEnv *env, int errorNum, char *msg);
 108 int NET_GetError();
 109 
 110 void NET_ThrowCurrent(JNIEnv *env, char *msg);
 111 
 112 jfieldID NET_GetFileDescriptorID(JNIEnv *env);
 113 
 114 JNIEXPORT jint JNICALL ipv6_available() ;
 115 
 116 void
 117 NET_AllocSockaddr(struct sockaddr **him, int *len);
 118 
 119 JNIEXPORT int JNICALL
 120 NET_InetAddressToSockaddr(JNIEnv *env, jobject iaObj, int port, struct sockaddr *him, int *len, jboolean v4MappedAddress);
 121 
 122 JNIEXPORT jobject JNICALL
 123 NET_SockaddrToInetAddress(JNIEnv *env, struct sockaddr *him, int *port);
 124 
 125 void initLocalAddrTable ();
 126 
 127 void
 128 NET_SetTrafficClass(struct sockaddr *him, int trafficClass);
 129 
 130 JNIEXPORT jint JNICALL
 131 NET_GetPortFromSockaddr(struct sockaddr *him);
 132 
 133 JNIEXPORT jint JNICALL
 134 NET_SockaddrEqualsInetAddress(JNIEnv *env,struct sockaddr *him, jobject iaObj);
 135 
 136 int
 137 NET_IsIPv4Mapped(jbyte* caddr);
 138 
 139 int
 140 NET_IPv4MappedToIPv4(jbyte* caddr);
 141 
 142 int
 143 NET_IsEqual(jbyte* caddr1, jbyte* caddr2);
 144 
 145 /* Socket operations
 146  *
 147  * These work just like the JVM_* procedures, except that they may do some
 148  * platform-specific pre/post processing of the arguments and/or results.
 149  */
 150 
 151 JNIEXPORT int JNICALL
 152 NET_GetSockOpt(int fd, int level, int opt, void *result, int *len);
 153 
 154 JNIEXPORT int JNICALL
 155 NET_SetSockOpt(int fd, int level, int opt, const void *arg, int len);
 156 
 157 JNIEXPORT int JNICALL
 158 NET_Bind(int fd, struct sockaddr *him, int len);
 159 
 160 JNIEXPORT int JNICALL
 161 NET_MapSocketOption(jint cmd, int *level, int *optname);
 162 
 163 JNIEXPORT int JNICALL
 164 NET_MapSocketOptionV6(jint cmd, int *level, int *optname);
 165 
 166 int getScopeID (struct sockaddr *);
 167 
 168 int cmpScopeID (unsigned int, struct sockaddr *);
 169 
 170 unsigned short in_cksum(unsigned short *addr, int len);
 171 #endif /* NET_UTILS_H */