1 /* 2 * Copyright (c) 1997, 2018, 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 jobject getInet6Address_scopeifname(JNIEnv *env, jobject ia6Obj); 65 extern jboolean setInet6Address_scopeifname(JNIEnv *env, jobject ia6Obj, jobject scopeifname); 66 extern jboolean getInet6Address_scopeid_set(JNIEnv *env, jobject ia6Obj); 67 extern unsigned int getInet6Address_scopeid(JNIEnv *env, jobject ia6Obj); 68 extern jboolean setInet6Address_scopeid(JNIEnv *env, jobject ia6Obj, int scopeid); 69 extern jboolean getInet6Address_ipaddress(JNIEnv *env, jobject ia6Obj, char *dest); 70 extern jboolean setInet6Address_ipaddress(JNIEnv *env, jobject ia6Obj, char *address); 71 72 extern void setInetAddress_addr(JNIEnv *env, jobject iaObj, int address); 73 extern void setInetAddress_family(JNIEnv *env, jobject iaObj, int family); 74 extern void setInetAddress_hostName(JNIEnv *env, jobject iaObj, jobject h); 75 extern int getInetAddress_addr(JNIEnv *env, jobject iaObj); 76 extern int getInetAddress_family(JNIEnv *env, jobject iaObj); 77 extern jobject getInetAddress_hostName(JNIEnv *env, jobject iaObj); 78 79 extern jclass ia4_class; 80 extern jmethodID ia4_ctrID; 81 82 /* NetworkInterface fields */ 83 extern jclass ni_class; 84 extern jfieldID ni_nameID; 85 extern jfieldID ni_indexID; 86 extern jfieldID ni_addrsID; 87 extern jfieldID ni_descID; 88 extern jmethodID ni_ctrID; 89 90 /* PlainSocketImpl fields */ 91 extern jfieldID psi_timeoutID; 92 extern jfieldID psi_fdID; 93 extern jfieldID psi_addressID; 94 extern jfieldID psi_portID; 95 extern jfieldID psi_localportID; 96 97 /* DatagramPacket fields */ 98 extern jfieldID dp_addressID; 99 extern jfieldID dp_portID; 100 extern jfieldID dp_bufID; 101 extern jfieldID dp_offsetID; 102 extern jfieldID dp_lengthID; 103 extern jfieldID dp_bufLengthID; 104 105 /* Inet6Address fields */ 106 extern jclass ia6_class; 107 extern jfieldID ia6_holder6ID; 108 extern jfieldID ia6_ipaddressID; 109 extern jfieldID ia6_scopeidID; 110 extern jfieldID ia6_cachedscopeidID; 111 extern jfieldID ia6_scopeidsetID; 112 extern jfieldID ia6_scopeifnameID; 113 extern jmethodID ia6_ctrID; 114 115 /************************************************************************ 116 * Utilities 117 */ 118 JNIEXPORT void JNICALL Java_java_net_InetAddress_init(JNIEnv *env, jclass cls); 119 JNIEXPORT void JNICALL Java_java_net_Inet4Address_init(JNIEnv *env, jclass cls); 120 JNIEXPORT void JNICALL Java_java_net_Inet6Address_init(JNIEnv *env, jclass cls); 121 JNIEXPORT void JNICALL Java_java_net_NetworkInterface_init(JNIEnv *env, jclass cls); 122 123 JNIEXPORT void JNICALL NET_ThrowNew(JNIEnv *env, int errorNum, char *msg); 124 125 int NET_GetError(); 126 127 void NET_ThrowCurrent(JNIEnv *env, char *msg); 128 129 jfieldID NET_GetFileDescriptorID(JNIEnv *env); 130 131 JNIEXPORT jint JNICALL ipv6_available(); 132 133 JNIEXPORT jint JNICALL reuseport_available(); 134 135 /** 136 * This function will fill a SOCKETADDRESS structure from an InetAddress 137 * object. 138 * 139 * The parameter 'sa' must point to valid storage of size 140 * 'sizeof(SOCKETADDRESS)'. 141 * 142 * The parameter 'len' is a pointer to an int and is used for returning 143 * the actual sockaddr length, e.g. 'sizeof(struct sockaddr_in)' or 144 * 'sizeof(struct sockaddr_in6)'. 145 * 146 * If the type of the InetAddress object is IPv6, the function will fill a 147 * sockaddr_in6 structure. IPv6 must be available in that case, otherwise an 148 * exception is thrown. 149 * In the case of an IPv4 InetAddress, when IPv6 is available and 150 * v4MappedAddress is TRUE, this method will fill a sockaddr_in6 structure 151 * containing an IPv4 mapped IPv6 address. Otherwise a sockaddr_in 152 * structure will be filled. 153 */ 154 JNIEXPORT int JNICALL 155 NET_InetAddressToSockaddr(JNIEnv *env, jobject iaObj, int port, 156 SOCKETADDRESS *sa, int *len, 157 jboolean v4MappedAddress); 158 159 JNIEXPORT jobject JNICALL 160 NET_SockaddrToInetAddress(JNIEnv *env, SOCKETADDRESS *sa, int *port); 161 162 void platformInit(); 163 164 void parseExclusiveBindProperty(JNIEnv *env); 165 166 JNIEXPORT jint JNICALL NET_GetPortFromSockaddr(SOCKETADDRESS *sa); 167 168 JNIEXPORT jboolean JNICALL 169 NET_SockaddrEqualsInetAddress(JNIEnv *env, SOCKETADDRESS *sa, jobject iaObj); 170 171 int NET_IsIPv4Mapped(jbyte* caddr); 172 173 int NET_IPv4MappedToIPv4(jbyte* caddr); 174 175 int NET_IsEqual(jbyte* caddr1, jbyte* caddr2); 176 177 int NET_IsZeroAddr(jbyte* caddr); 178 179 /* Socket operations 180 * 181 * These work just like the system calls, except that they may do some 182 * platform-specific pre/post processing of the arguments and/or results. 183 */ 184 185 JNIEXPORT int JNICALL 186 NET_GetSockOpt(int fd, int level, int opt, void *result, int *len); 187 188 JNIEXPORT int JNICALL 189 NET_SetSockOpt(int fd, int level, int opt, const void *arg, int len); 190 191 JNIEXPORT int JNICALL 192 NET_Bind(int fd, SOCKETADDRESS *sa, int len); 193 194 JNIEXPORT int JNICALL 195 NET_MapSocketOption(jint cmd, int *level, int *optname); 196 197 JNIEXPORT int JNICALL 198 NET_MapSocketOptionV6(jint cmd, int *level, int *optname); 199 200 JNIEXPORT jint JNICALL 201 NET_EnableFastTcpLoopback(int fd); 202 203 unsigned short in_cksum(unsigned short *addr, int len); 204 205 JNIEXPORT jint JNICALL 206 NET_Wait(JNIEnv *env, jint fd, jint flags, jint timeout); 207 208 #endif /* NET_UTILS_H */