J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2005 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 | #include "jni.h" |
| 27 | #include "jvm.h" |
| 28 | #include "jni_util.h" |
| 29 | #include "net_util.h" |
| 30 | |
| 31 | int IPv6_supported() ; |
| 32 | |
| 33 | static int IPv6_available; |
| 34 | |
| 35 | JNIEXPORT jint JNICALL ipv6_available() |
| 36 | { |
| 37 | return IPv6_available ; |
| 38 | } |
| 39 | |
| 40 | JNIEXPORT jint JNICALL |
| 41 | JNI_OnLoad(JavaVM *vm, void *reserved) |
| 42 | { |
| 43 | JNIEnv *env; |
| 44 | jclass iCls; |
| 45 | jmethodID mid; |
| 46 | jstring s; |
| 47 | jint preferIPv4Stack; |
| 48 | |
| 49 | if ((*vm)->GetEnv(vm, (void **)&env, JNI_VERSION_1_2) == JNI_OK) { |
| 50 | if (JVM_InitializeSocketLibrary() < 0) { |
| 51 | JNU_ThrowByName(env, "java/lang/UnsatisfiedLinkError", |
| 52 | "failed to initialize net library."); |
| 53 | return JNI_VERSION_1_2; |
| 54 | } |
| 55 | } |
| 56 | iCls = (*env)->FindClass(env, "java/lang/Boolean"); |
| 57 | CHECK_NULL_RETURN(iCls, JNI_VERSION_1_2); |
| 58 | mid = (*env)->GetStaticMethodID(env, iCls, "getBoolean", "(Ljava/lang/String;)Z"); |
| 59 | CHECK_NULL_RETURN(mid, JNI_VERSION_1_2); |
| 60 | s = (*env)->NewStringUTF(env, "java.net.preferIPv4Stack"); |
| 61 | CHECK_NULL_RETURN(s, JNI_VERSION_1_2); |
| 62 | preferIPv4Stack = (*env)->CallStaticBooleanMethod(env, iCls, mid, s); |
| 63 | |
| 64 | /* |
| 65 | Since we have initialized and loaded the Socket library we will |
| 66 | check now to whether we have IPv6 on this platform and if the |
| 67 | supporting socket APIs are available |
| 68 | */ |
| 69 | IPv6_available = IPv6_supported() & (!preferIPv4Stack); |
| 70 | initLocalAddrTable (); |
| 71 | return JNI_VERSION_1_2; |
| 72 | } |
| 73 | |
| 74 | static int initialized = 0; |
| 75 | |
| 76 | void init(JNIEnv *env) { |
| 77 | if (!initialized) { |
| 78 | Java_java_net_InetAddress_init(env, 0); |
| 79 | Java_java_net_Inet4Address_init(env, 0); |
| 80 | Java_java_net_Inet6Address_init(env, 0); |
| 81 | initialized = 1; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | jobject |
| 86 | NET_SockaddrToInetAddress(JNIEnv *env, struct sockaddr *him, int *port) { |
| 87 | jobject iaObj; |
| 88 | init(env); |
| 89 | #ifdef AF_INET6 |
| 90 | if (him->sa_family == AF_INET6) { |
| 91 | jbyteArray ipaddress; |
| 92 | #ifdef WIN32 |
| 93 | struct SOCKADDR_IN6 *him6 = (struct SOCKADDR_IN6 *)him; |
| 94 | #else |
| 95 | struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)him; |
| 96 | #endif |
| 97 | jbyte *caddr = (jbyte *)&(him6->sin6_addr); |
| 98 | if (NET_IsIPv4Mapped(caddr)) { |
| 99 | int address; |
| 100 | static jclass inet4Cls = 0; |
| 101 | if (inet4Cls == 0) { |
| 102 | jclass c = (*env)->FindClass(env, "java/net/Inet4Address"); |
| 103 | CHECK_NULL_RETURN(c, NULL); |
| 104 | inet4Cls = (*env)->NewGlobalRef(env, c); |
| 105 | CHECK_NULL_RETURN(inet4Cls, NULL); |
| 106 | (*env)->DeleteLocalRef(env, c); |
| 107 | } |
| 108 | iaObj = (*env)->NewObject(env, inet4Cls, ia4_ctrID); |
| 109 | CHECK_NULL_RETURN(iaObj, NULL); |
| 110 | address = NET_IPv4MappedToIPv4(caddr); |
| 111 | (*env)->SetIntField(env, iaObj, ia_addressID, address); |
| 112 | (*env)->SetIntField(env, iaObj, ia_familyID, IPv4); |
| 113 | } else { |
| 114 | static jclass inet6Cls = 0; |
| 115 | if (inet6Cls == 0) { |
| 116 | jclass c = (*env)->FindClass(env, "java/net/Inet6Address"); |
| 117 | CHECK_NULL_RETURN(c, NULL); |
| 118 | inet6Cls = (*env)->NewGlobalRef(env, c); |
| 119 | CHECK_NULL_RETURN(inet6Cls, NULL); |
| 120 | (*env)->DeleteLocalRef(env, c); |
| 121 | } |
| 122 | iaObj = (*env)->NewObject(env, inet6Cls, ia6_ctrID); |
| 123 | CHECK_NULL_RETURN(iaObj, NULL); |
| 124 | ipaddress = (*env)->NewByteArray(env, 16); |
| 125 | CHECK_NULL_RETURN(ipaddress, NULL); |
| 126 | (*env)->SetByteArrayRegion(env, ipaddress, 0, 16, |
| 127 | (jbyte *)&(him6->sin6_addr)); |
| 128 | |
| 129 | (*env)->SetObjectField(env, iaObj, ia6_ipaddressID, ipaddress); |
| 130 | |
| 131 | (*env)->SetIntField(env, iaObj, ia_familyID, IPv6); |
| 132 | (*env)->SetIntField(env, iaObj, ia6_scopeidID, getScopeID(him)); |
| 133 | } |
| 134 | *port = ntohs(him6->sin6_port); |
| 135 | } else |
| 136 | #endif /* AF_INET6 */ |
| 137 | { |
| 138 | struct sockaddr_in *him4 = (struct sockaddr_in *)him; |
| 139 | static jclass inet4Cls = 0; |
| 140 | |
| 141 | if (inet4Cls == 0) { |
| 142 | jclass c = (*env)->FindClass(env, "java/net/Inet4Address"); |
| 143 | CHECK_NULL_RETURN(c, NULL); |
| 144 | inet4Cls = (*env)->NewGlobalRef(env, c); |
| 145 | CHECK_NULL_RETURN(inet4Cls, NULL); |
| 146 | (*env)->DeleteLocalRef(env, c); |
| 147 | } |
| 148 | iaObj = (*env)->NewObject(env, inet4Cls, ia4_ctrID); |
| 149 | CHECK_NULL_RETURN(iaObj, NULL); |
| 150 | (*env)->SetIntField(env, iaObj, ia_familyID, IPv4); |
| 151 | (*env)->SetIntField(env, iaObj, ia_addressID, |
| 152 | ntohl(him4->sin_addr.s_addr)); |
| 153 | *port = ntohs(him4->sin_port); |
| 154 | } |
| 155 | return iaObj; |
| 156 | } |
| 157 | |
| 158 | jint |
| 159 | NET_SockaddrEqualsInetAddress(JNIEnv *env, struct sockaddr *him, jobject iaObj) |
| 160 | { |
| 161 | jint family = (*env)->GetIntField(env, iaObj, ia_familyID) == IPv4? |
| 162 | AF_INET : AF_INET6; |
| 163 | |
| 164 | #ifdef AF_INET6 |
| 165 | if (him->sa_family == AF_INET6) { |
| 166 | #ifdef WIN32 |
| 167 | struct SOCKADDR_IN6 *him6 = (struct SOCKADDR_IN6 *)him; |
| 168 | #else |
| 169 | struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)him; |
| 170 | #endif |
| 171 | jbyte *caddrNew = (jbyte *)&(him6->sin6_addr); |
| 172 | if (NET_IsIPv4Mapped(caddrNew)) { |
| 173 | int addrNew; |
| 174 | int addrCur; |
| 175 | if (family == AF_INET6) { |
| 176 | return JNI_FALSE; |
| 177 | } |
| 178 | addrNew = NET_IPv4MappedToIPv4(caddrNew); |
| 179 | addrCur = (*env)->GetIntField(env, iaObj, ia_addressID); |
| 180 | if (addrNew == addrCur) { |
| 181 | return JNI_TRUE; |
| 182 | } else { |
| 183 | return JNI_FALSE; |
| 184 | } |
| 185 | } else { |
| 186 | jbyteArray ipaddress; |
| 187 | jbyte caddrCur[16]; |
| 188 | int scope; |
| 189 | |
| 190 | if (family == AF_INET) { |
| 191 | return JNI_FALSE; |
| 192 | } |
| 193 | ipaddress = (*env)->GetObjectField(env, iaObj, ia6_ipaddressID); |
| 194 | scope = (*env)->GetIntField(env, iaObj, ia6_scopeidID); |
| 195 | (*env)->GetByteArrayRegion(env, ipaddress, 0, 16, caddrCur); |
| 196 | if (NET_IsEqual(caddrNew, caddrCur) && cmpScopeID(scope, him)) { |
| 197 | return JNI_TRUE; |
| 198 | } else { |
| 199 | return JNI_FALSE; |
| 200 | } |
| 201 | } |
| 202 | } else |
| 203 | #endif /* AF_INET6 */ |
| 204 | { |
| 205 | struct sockaddr_in *him4 = (struct sockaddr_in *)him; |
| 206 | int addrNew, addrCur; |
| 207 | if (family != AF_INET) { |
| 208 | return JNI_FALSE; |
| 209 | } |
| 210 | addrNew = ntohl(him4->sin_addr.s_addr); |
| 211 | addrCur = (*env)->GetIntField(env, iaObj, ia_addressID); |
| 212 | if (addrNew == addrCur) { |
| 213 | return JNI_TRUE; |
| 214 | } else { |
| 215 | return JNI_FALSE; |
| 216 | } |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | unsigned short |
| 221 | in_cksum(unsigned short *addr, int len) { |
| 222 | int nleft = len; |
| 223 | int sum = 0; |
| 224 | unsigned short *w = addr; |
| 225 | unsigned short answer = 0; |
| 226 | while(nleft > 1) { |
| 227 | sum += *w++; |
| 228 | nleft -= 2; |
| 229 | } |
| 230 | |
| 231 | if (nleft == 1) { |
| 232 | *(unsigned char *) (&answer) = *(unsigned char *)w; |
| 233 | sum += answer; |
| 234 | } |
| 235 | |
| 236 | sum = (sum >> 16) + (sum & 0xffff); |
| 237 | sum += (sum >> 16); |
| 238 | answer = ~sum; |
| 239 | return (answer); |
| 240 | } |