J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001-2007 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 "jni_util.h" |
| 28 | #include "jvm.h" |
| 29 | #include "jlong.h" |
| 30 | |
| 31 | #include <netdb.h> |
| 32 | #include <sys/types.h> |
| 33 | #include <sys/socket.h> |
| 34 | #include <stdlib.h> |
| 35 | #include <string.h> |
| 36 | #include <errno.h> |
| 37 | |
| 38 | #if __linux__ |
| 39 | #include <netinet/in.h> |
| 40 | #endif |
| 41 | |
| 42 | #include "net_util.h" |
| 43 | #include "net_util_md.h" |
| 44 | #include "nio.h" |
| 45 | #include "nio_util.h" |
| 46 | |
| 47 | #include "sun_nio_ch_DatagramChannelImpl.h" |
| 48 | |
| 49 | static jfieldID isa_addrID; /* address in java.net.InetSocketAddress */ |
| 50 | static jfieldID isa_portID; /* port in java.net.InetSocketAddress */ |
| 51 | static jfieldID dci_senderID; /* sender in sun.nio.ch.DatagramChannelImpl */ |
| 52 | static jfieldID dci_senderAddrID; /* sender InetAddress in sun.nio.ch.DatagramChannelImpl */ |
| 53 | static jfieldID dci_senderPortID; /* sender port in sun.nio.ch.DatagramChannelImpl */ |
| 54 | static jclass isa_class; /* java.net.InetSocketAddress */ |
| 55 | static jmethodID isa_ctorID; /* .InetSocketAddress(InetAddress, int) */ |
| 56 | |
| 57 | JNIEXPORT void JNICALL |
| 58 | Java_sun_nio_ch_DatagramChannelImpl_initIDs(JNIEnv *env, jclass clazz) |
| 59 | { |
| 60 | clazz = (*env)->FindClass(env, "java/net/InetSocketAddress"); |
| 61 | isa_class = (*env)->NewGlobalRef(env, clazz); |
| 62 | isa_ctorID = (*env)->GetMethodID(env, clazz, "<init>", |
| 63 | "(Ljava/net/InetAddress;I)V"); |
| 64 | isa_addrID = (*env)->GetFieldID(env, clazz, "addr", |
| 65 | "Ljava/net/InetAddress;"); |
| 66 | isa_portID = (*env)->GetFieldID(env, clazz, "port", "I"); |
| 67 | |
| 68 | clazz = (*env)->FindClass(env, "sun/nio/ch/DatagramChannelImpl"); |
| 69 | dci_senderID = (*env)->GetFieldID(env, clazz, "sender", |
| 70 | "Ljava/net/SocketAddress;"); |
| 71 | dci_senderAddrID = (*env)->GetFieldID(env, clazz, |
| 72 | "cachedSenderInetAddress", |
| 73 | "Ljava/net/InetAddress;"); |
| 74 | dci_senderPortID = (*env)->GetFieldID(env, clazz, |
| 75 | "cachedSenderPort", "I"); |
| 76 | } |
| 77 | |
| 78 | JNIEXPORT void JNICALL |
| 79 | Java_sun_nio_ch_DatagramChannelImpl_disconnect0(JNIEnv *env, jobject this, |
| 80 | jobject fdo) |
| 81 | { |
| 82 | jint fd = fdval(env, fdo); |
| 83 | int rv; |
| 84 | |
| 85 | #ifdef __solaris__ |
| 86 | rv = connect(fd, 0, 0); |
| 87 | #endif |
| 88 | |
| 89 | #ifdef __linux__ |
| 90 | { |
| 91 | int len; |
| 92 | SOCKADDR sa; |
| 93 | |
| 94 | memset(&sa, 0, sizeof(sa)); |
| 95 | |
| 96 | #ifdef AF_INET6 |
| 97 | if (ipv6_available()) { |
| 98 | struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)&sa; |
| 99 | him6->sin6_family = AF_UNSPEC; |
| 100 | len = sizeof(struct sockaddr_in6); |
| 101 | } else |
| 102 | #endif |
| 103 | { |
| 104 | struct sockaddr_in *him4 = (struct sockaddr_in*)&sa; |
| 105 | him4->sin_family = AF_UNSPEC; |
| 106 | len = sizeof(struct sockaddr_in); |
| 107 | } |
| 108 | |
| 109 | rv = connect(fd, (struct sockaddr *)&sa, len); |
| 110 | } |
| 111 | #endif |
| 112 | |
| 113 | if (rv < 0) |
| 114 | handleSocketError(env, errno); |
| 115 | |
| 116 | } |
| 117 | |
| 118 | JNIEXPORT jint JNICALL |
| 119 | Java_sun_nio_ch_DatagramChannelImpl_receive0(JNIEnv *env, jobject this, |
| 120 | jobject fdo, jlong address, |
| 121 | jint len, jboolean connected) |
| 122 | { |
| 123 | jint fd = fdval(env, fdo); |
| 124 | void *buf = (void *)jlong_to_ptr(address); |
| 125 | SOCKADDR sa; |
| 126 | int sa_len = SOCKADDR_LEN; |
| 127 | jboolean retry = JNI_FALSE; |
| 128 | jint n = 0; |
| 129 | jobject senderAddr; |
| 130 | |
| 131 | if (len > MAX_PACKET_LEN) { |
| 132 | len = MAX_PACKET_LEN; |
| 133 | } |
| 134 | |
| 135 | do { |
| 136 | retry = JNI_FALSE; |
| 137 | n = recvfrom(fd, buf, len, 0, (struct sockaddr *)&sa, &sa_len); |
| 138 | if (n < 0) { |
| 139 | if (errno == EWOULDBLOCK) { |
| 140 | return IOS_UNAVAILABLE; |
| 141 | } |
| 142 | if (errno == EINTR) { |
| 143 | return IOS_INTERRUPTED; |
| 144 | } |
| 145 | if (errno == ECONNREFUSED) { |
| 146 | if (connected == JNI_FALSE) { |
| 147 | retry = JNI_TRUE; |
| 148 | } else { |
| 149 | JNU_ThrowByName(env, JNU_JAVANETPKG |
| 150 | "PortUnreachableException", 0); |
| 151 | return IOS_THROWN; |
| 152 | } |
| 153 | } else { |
| 154 | return handleSocketError(env, errno); |
| 155 | } |
| 156 | } |
| 157 | } while (retry == JNI_TRUE); |
| 158 | |
| 159 | /* |
| 160 | * If the source address and port match the cached address |
| 161 | * and port in DatagramChannelImpl then we don't need to |
| 162 | * create InetAddress and InetSocketAddress objects. |
| 163 | */ |
| 164 | senderAddr = (*env)->GetObjectField(env, this, dci_senderAddrID); |
| 165 | if (senderAddr != NULL) { |
| 166 | if (!NET_SockaddrEqualsInetAddress(env, (struct sockaddr *)&sa, |
| 167 | senderAddr)) { |
| 168 | senderAddr = NULL; |
| 169 | } else { |
| 170 | jint port = (*env)->GetIntField(env, this, dci_senderPortID); |
| 171 | if (port != NET_GetPortFromSockaddr((struct sockaddr *)&sa)) { |
| 172 | senderAddr = NULL; |
| 173 | } |
| 174 | } |
| 175 | } |
| 176 | if (senderAddr == NULL) { |
| 177 | jobject isa = NULL; |
| 178 | int port; |
| 179 | jobject ia = NET_SockaddrToInetAddress(env, (struct sockaddr *)&sa, |
| 180 | &port); |
| 181 | |
| 182 | if (ia != NULL) { |
| 183 | isa = (*env)->NewObject(env, isa_class, isa_ctorID, ia, port); |
| 184 | } |
| 185 | |
| 186 | if (isa == NULL) { |
| 187 | JNU_ThrowOutOfMemoryError(env, "heap allocation failed"); |
| 188 | return IOS_THROWN; |
| 189 | } |
| 190 | |
| 191 | (*env)->SetObjectField(env, this, dci_senderAddrID, ia); |
| 192 | (*env)->SetIntField(env, this, dci_senderPortID, |
| 193 | NET_GetPortFromSockaddr((struct sockaddr *)&sa)); |
| 194 | (*env)->SetObjectField(env, this, dci_senderID, isa); |
| 195 | } |
| 196 | return n; |
| 197 | } |
| 198 | |
| 199 | JNIEXPORT jint JNICALL |
| 200 | Java_sun_nio_ch_DatagramChannelImpl_send0(JNIEnv *env, jobject this, |
| 201 | jobject fdo, jlong address, |
| 202 | jint len, jobject dest) |
| 203 | { |
| 204 | jint fd = fdval(env, fdo); |
| 205 | void *buf = (void *)jlong_to_ptr(address); |
| 206 | SOCKADDR sa; |
| 207 | int sa_len = SOCKADDR_LEN; |
| 208 | jint n = 0; |
| 209 | jobject destAddress = (*env)->GetObjectField(env, dest, isa_addrID); |
| 210 | jint destPort = (*env)->GetIntField(env, dest, isa_portID); |
| 211 | |
| 212 | if (len > MAX_PACKET_LEN) { |
| 213 | len = MAX_PACKET_LEN; |
| 214 | } |
| 215 | |
| 216 | if (NET_InetAddressToSockaddr(env, destAddress, destPort, |
| 217 | (struct sockaddr *)&sa, |
| 218 | &sa_len, JNI_TRUE) != 0) { |
| 219 | return IOS_THROWN; |
| 220 | } |
| 221 | |
| 222 | n = sendto(fd, buf, len, 0, (struct sockaddr *)&sa, sa_len); |
| 223 | if (n < 0) { |
| 224 | if (errno == EAGAIN) { |
| 225 | return IOS_UNAVAILABLE; |
| 226 | } |
| 227 | if (errno == EINTR) { |
| 228 | return IOS_INTERRUPTED; |
| 229 | } |
| 230 | if (errno == ECONNREFUSED) { |
| 231 | JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0); |
| 232 | return IOS_THROWN; |
| 233 | } |
| 234 | return handleSocketError(env, errno); |
| 235 | } |
| 236 | return n; |
| 237 | } |