1 /* 2 * Copyright (c) 1997, 2020, 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 */ 50 extern jclass ia_class; 51 extern jfieldID iac_addressID; 52 extern jfieldID iac_familyID; 53 extern jfieldID iac_hostNameID; 54 extern jfieldID iac_origHostNameID; 55 extern jfieldID ia_preferIPv6AddressID; 56 57 JNIEXPORT 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 */ 64 extern jboolean setInet6Address_scopeifname(JNIEnv *env, jobject ia6Obj, jobject scopeifname); 65 extern unsigned int getInet6Address_scopeid(JNIEnv *env, jobject ia6Obj); 66 extern jboolean setInet6Address_scopeid(JNIEnv *env, jobject ia6Obj, int scopeid); 67 extern jboolean getInet6Address_ipaddress(JNIEnv *env, jobject ia6Obj, char *dest); 68 extern jboolean setInet6Address_ipaddress(JNIEnv *env, jobject ia6Obj, char *address); 69 70 extern void setInetAddress_addr(JNIEnv *env, jobject iaObj, int address); 71 extern void setInetAddress_family(JNIEnv *env, jobject iaObj, int family); 72 extern void setInetAddress_hostName(JNIEnv *env, jobject iaObj, jobject h); 73 extern int getInetAddress_addr(JNIEnv *env, jobject iaObj); 74 extern int getInetAddress_family(JNIEnv *env, jobject iaObj); 75 76 extern jclass ia4_class; 77 extern jmethodID ia4_ctrID; 78 79 /* NetworkInterface fields */ 80 extern jclass ni_class; 81 extern jfieldID ni_nameID; 82 extern jfieldID ni_indexID; 83 extern jfieldID ni_addrsID; 84 extern jfieldID ni_descID; 85 extern jmethodID ni_ctrID; 86 87 /* PlainSocketImpl fields */ 88 extern jfieldID psi_timeoutID; 89 extern jfieldID psi_fdID; 90 extern jfieldID psi_addressID; 91 extern jfieldID psi_portID; 92 extern jfieldID psi_localportID; 93 94 /* DatagramPacket fields */ 95 extern jfieldID dp_addressID; 96 extern jfieldID dp_portID; 97 extern jfieldID dp_bufID; 98 extern jfieldID dp_offsetID; 99 extern jfieldID dp_lengthID; 100 extern jfieldID dp_bufLengthID; 101 102 /* Inet6Address fields */ 103 extern jclass ia6_class; 104 extern jfieldID ia6_holder6ID; 105 extern jfieldID ia6_ipaddressID; 106 extern jfieldID ia6_scopeidID; 107 extern jfieldID ia6_scopeidsetID; 108 extern jfieldID ia6_scopeifnameID; 109 extern jmethodID ia6_ctrID; 110 111 /************************************************************************ 112 * Utilities 113 */ 114 JNIEXPORT void JNICALL Java_java_net_InetAddress_init(JNIEnv *env, jclass cls); 115 JNIEXPORT void JNICALL Java_java_net_Inet4Address_init(JNIEnv *env, jclass cls); 116 JNIEXPORT void JNICALL Java_java_net_Inet6Address_init(JNIEnv *env, jclass cls); 117 JNIEXPORT void JNICALL Java_java_net_NetworkInterface_init(JNIEnv *env, jclass cls); 118 119 JNIEXPORT void JNICALL NET_ThrowNew(JNIEnv *env, int errorNum, char *msg); 120 121 void NET_ThrowCurrent(JNIEnv *env, char *msg); 122 123 jfieldID NET_GetFileDescriptorID(JNIEnv *env); 124 125 JNIEXPORT jint JNICALL ipv4_available(); 126 JNIEXPORT jint JNICALL ipv6_available(); 127 128 JNIEXPORT jint JNICALL reuseport_available(); 129 130 /** 131 * This function will fill a SOCKETADDRESS structure from an InetAddress 132 * object. 133 * 134 * The parameter 'sa' must point to valid storage of size 135 * 'sizeof(SOCKETADDRESS)'. 136 * 137 * The parameter 'len' is a pointer to an int and is used for returning 138 * the actual sockaddr length, e.g. 'sizeof(struct sockaddr_in)' or 139 * 'sizeof(struct sockaddr_in6)'. 140 * 141 * If the type of the InetAddress object is IPv6, the function will fill a 142 * sockaddr_in6 structure. IPv6 must be available in that case, otherwise an 143 * exception is thrown. 144 * In the case of an IPv4 InetAddress, when IPv6 is available and 145 * v4MappedAddress is TRUE, this method will fill a sockaddr_in6 structure 146 * containing an IPv4 mapped IPv6 address. Otherwise a sockaddr_in 147 * structure will be filled. 148 */ 149 JNIEXPORT int JNICALL 150 NET_InetAddressToSockaddr(JNIEnv *env, jobject iaObj, int port, 151 SOCKETADDRESS *sa, int *len, 152 jboolean v4MappedAddress); 153 154 JNIEXPORT jobject JNICALL 155 NET_SockaddrToInetAddress(JNIEnv *env, SOCKETADDRESS *sa, int *port); 156 157 void platformInit(); 158 159 JNIEXPORT jint JNICALL NET_GetPortFromSockaddr(SOCKETADDRESS *sa); 160 161 JNIEXPORT jboolean JNICALL 162 NET_SockaddrEqualsInetAddress(JNIEnv *env, SOCKETADDRESS *sa, jobject iaObj); 163 164 int NET_IsIPv4Mapped(jbyte* caddr); 165 166 int NET_IPv4MappedToIPv4(jbyte* caddr); 167 168 int NET_IsEqual(jbyte* caddr1, jbyte* caddr2); 169 170 int NET_IsZeroAddr(jbyte* caddr); 171 172 /* Socket operations 173 * 174 * These work just like the system calls, except that they may do some 175 * platform-specific pre/post processing of the arguments and/or results. 176 */ 177 178 JNIEXPORT int JNICALL 179 NET_SocketAvailable(int fd, int *pbytes); 180 181 JNIEXPORT int JNICALL 182 NET_GetSockOpt(int fd, int level, int opt, void *result, int *len); 183 184 JNIEXPORT int JNICALL 185 NET_SetSockOpt(int fd, int level, int opt, const void *arg, int len); 186 187 JNIEXPORT int JNICALL 188 NET_Bind(int fd, SOCKETADDRESS *sa, int len); 189 190 JNIEXPORT int JNICALL 191 NET_MapSocketOption(jint cmd, int *level, int *optname); 192 193 JNIEXPORT int JNICALL 194 NET_MapSocketOptionV6(jint cmd, int *level, int *optname); 195 196 JNIEXPORT jint JNICALL 197 NET_EnableFastTcpLoopback(int fd); 198 199 unsigned short in_cksum(unsigned short *addr, int len); 200 201 jint NET_Wait(JNIEnv *env, jint fd, jint flags, jint timeout); 202 203 #endif /* NET_UTILS_H */