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 /* 2 bytes to allow for null at end of string and null at start of string for abstract name */ 44 #define MAX_UNIX_DOMAIN_PATH_LEN (int)(sizeof(((struct sockaddr_un *)0)->sun_path)-2) 45 46 /************************************************************************ 47 * Cached field IDs 48 * 49 * The naming convention for field IDs is 50 * <class abbrv>_<fieldName>ID 51 * i.e. psi_timeoutID is PlainSocketImpl's timeout field's ID. 52 */ 53 extern jclass ia_class; 54 extern jfieldID iac_addressID; 55 extern jfieldID iac_familyID; 56 extern jfieldID iac_hostNameID; 57 extern jfieldID iac_origHostNameID; 58 extern jfieldID ia_preferIPv6AddressID; 59 60 JNIEXPORT void JNICALL initInetAddressIDs(JNIEnv *env); 61 62 /** (Inet6Address accessors) 63 * set_ methods return JNI_TRUE on success JNI_FALSE on error 64 * get_ methods that return int/boolean, return -1 on error 65 * get_ methods that return objects return NULL on error. 66 */ 67 extern jboolean setInet6Address_scopeifname(JNIEnv *env, jobject ia6Obj, jobject scopeifname); 68 extern unsigned int getInet6Address_scopeid(JNIEnv *env, jobject ia6Obj); 69 extern jboolean setInet6Address_scopeid(JNIEnv *env, jobject ia6Obj, int scopeid); 70 extern jboolean getInet6Address_ipaddress(JNIEnv *env, jobject ia6Obj, char *dest); 71 extern jboolean setInet6Address_ipaddress(JNIEnv *env, jobject ia6Obj, char *address); 72 73 extern void setInetAddress_addr(JNIEnv *env, jobject iaObj, int address); 74 extern void setInetAddress_family(JNIEnv *env, jobject iaObj, int family); 75 extern void setInetAddress_hostName(JNIEnv *env, jobject iaObj, jobject h); 76 extern int getInetAddress_addr(JNIEnv *env, jobject iaObj); 77 extern int getInetAddress_family(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_scopeidsetID; 111 extern jfieldID ia6_scopeifnameID; 112 extern jmethodID ia6_ctrID; 113 114 /************************************************************************ 115 * Utilities 116 */ 117 JNIEXPORT void JNICALL Java_java_net_InetAddress_init(JNIEnv *env, jclass cls); 118 JNIEXPORT void JNICALL Java_java_net_Inet4Address_init(JNIEnv *env, jclass cls); 119 JNIEXPORT void JNICALL Java_java_net_Inet6Address_init(JNIEnv *env, jclass cls); 120 JNIEXPORT void JNICALL Java_java_net_NetworkInterface_init(JNIEnv *env, jclass cls); 121 122 JNIEXPORT void JNICALL NET_ThrowNew(JNIEnv *env, int errorNum, char *msg); 123 124 void NET_ThrowCurrent(JNIEnv *env, char *msg); 125 126 jfieldID NET_GetFileDescriptorID(JNIEnv *env); 127 128 JNIEXPORT jint JNICALL ipv4_available(); 129 JNIEXPORT jint JNICALL ipv6_available(); 130 131 JNIEXPORT 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 */ 152 JNIEXPORT int JNICALL 153 NET_InetAddressToSockaddr(JNIEnv *env, jobject iaObj, int port, 154 SOCKETADDRESS *sa, int *len, 155 jboolean v4MappedAddress); 156 157 JNIEXPORT jobject JNICALL 158 NET_SockaddrToInetAddress(JNIEnv *env, SOCKETADDRESS *sa, int *port); 159 160 JNIEXPORT jstring JNICALL 161 NET_SockaddrToUnixAddressString(JNIEnv *env, struct sockaddr_un *sa, socklen_t len); 162 163 JNIEXPORT jint JNICALL 164 NET_UnixSocketAddressToSockaddr(JNIEnv *env, jbyteArray uaddr, struct sockaddr_un *sa, int *len); 165 166 void platformInit(); 167 168 JNIEXPORT jint JNICALL NET_GetPortFromSockaddr(SOCKETADDRESS *sa); 169 170 JNIEXPORT jboolean JNICALL 171 NET_SockaddrEqualsInetAddress(JNIEnv *env, SOCKETADDRESS *sa, jobject iaObj); 172 173 int NET_IsIPv4Mapped(jbyte* caddr); 174 175 int NET_IPv4MappedToIPv4(jbyte* caddr); 176 177 int NET_IsEqual(jbyte* caddr1, jbyte* caddr2); 178 179 int NET_IsZeroAddr(jbyte* caddr); 180 181 /* Socket operations 182 * 183 * These work just like the system calls, except that they may do some 184 * platform-specific pre/post processing of the arguments and/or results. 185 */ 186 187 JNIEXPORT int JNICALL 188 NET_SocketAvailable(int fd, int *pbytes); 189 190 JNIEXPORT int JNICALL 191 NET_GetSockOpt(int fd, int level, int opt, void *result, int *len); 192 193 JNIEXPORT int JNICALL 194 NET_SetSockOpt(int fd, int level, int opt, const void *arg, int len); 195 196 JNIEXPORT int JNICALL 197 NET_Bind(int fd, SOCKETADDRESS *sa, int len); 198 199 JNIEXPORT int JNICALL 200 NET_MapSocketOption(jint cmd, int *level, int *optname); 201 202 JNIEXPORT int JNICALL 203 NET_MapSocketOptionV6(jint cmd, int *level, int *optname); 204 205 JNIEXPORT jint JNICALL 206 NET_EnableFastTcpLoopback(int fd); 207 208 unsigned short in_cksum(unsigned short *addr, int len); 209 210 jint NET_Wait(JNIEnv *env, jint fd, jint flags, jint timeout); 211 212 #endif /* NET_UTILS_H */