J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1997-2003 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 <windows.h> |
| 27 | #include <winsock2.h> |
| 28 | #include <ctype.h> |
| 29 | #include <stdio.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <malloc.h> |
| 32 | #include <sys/types.h> |
| 33 | |
| 34 | #include "java_net_SocketInputStream.h" |
| 35 | |
| 36 | #include "net_util.h" |
| 37 | #include "jni_util.h" |
| 38 | |
| 39 | /************************************************************************* |
| 40 | * SocketInputStream |
| 41 | */ |
| 42 | |
| 43 | static jfieldID IO_fd_fdID; |
| 44 | |
| 45 | /* |
| 46 | * Class: java_net_SocketInputStream |
| 47 | * Method: init |
| 48 | * Signature: ()V |
| 49 | */ |
| 50 | JNIEXPORT void JNICALL |
| 51 | Java_java_net_SocketInputStream_init(JNIEnv *env, jclass cls) { |
| 52 | IO_fd_fdID = NET_GetFileDescriptorID(env); |
| 53 | } |
| 54 | |
| 55 | /* |
| 56 | * Class: java_net_SocketInputStream |
| 57 | * Method: socketRead |
| 58 | * Signature: (Ljava/io/FileDescriptor;[BIII)I |
| 59 | */ |
| 60 | JNIEXPORT jint JNICALL |
| 61 | Java_java_net_SocketInputStream_socketRead0(JNIEnv *env, jobject this, |
| 62 | jobject fdObj, jbyteArray data, |
| 63 | jint off, jint len, jint timeout) |
| 64 | { |
| 65 | char *bufP; |
| 66 | char BUF[MAX_BUFFER_LEN]; |
| 67 | jint fd, newfd; |
| 68 | jint nread; |
| 69 | |
| 70 | if (IS_NULL(fdObj)) { |
| 71 | JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "socket closed"); |
| 72 | return -1; |
| 73 | } |
| 74 | fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID); |
| 75 | if (fd == -1) { |
| 76 | NET_ThrowSocketException(env, "Socket closed"); |
| 77 | return -1; |
| 78 | } |
| 79 | |
| 80 | /* |
| 81 | * If the caller buffer is large than our stack buffer then we allocate |
| 82 | * from the heap (up to a limit). If memory is exhausted we always use |
| 83 | * the stack buffer. |
| 84 | */ |
| 85 | if (len <= MAX_BUFFER_LEN) { |
| 86 | bufP = BUF; |
| 87 | } else { |
| 88 | if (len > MAX_HEAP_BUFFER_LEN) { |
| 89 | len = MAX_HEAP_BUFFER_LEN; |
| 90 | } |
| 91 | bufP = (char *)malloc((size_t)len); |
| 92 | if (bufP == NULL) { |
| 93 | /* allocation failed so use stack buffer */ |
| 94 | bufP = BUF; |
| 95 | len = MAX_BUFFER_LEN; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | |
| 100 | if (timeout) { |
| 101 | if (timeout <= 5000 || !isRcvTimeoutSupported) { |
| 102 | int ret = NET_Timeout (fd, timeout); |
| 103 | |
| 104 | if (ret <= 0) { |
| 105 | if (ret == 0) { |
| 106 | JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException", |
| 107 | "Read timed out"); |
| 108 | } else if (ret == JVM_IO_ERR) { |
| 109 | JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "socket closed"); |
| 110 | } else if (ret == JVM_IO_INTR) { |
| 111 | JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException", |
| 112 | "Operation interrupted"); |
| 113 | } |
| 114 | if (bufP != BUF) { |
| 115 | free(bufP); |
| 116 | } |
| 117 | return -1; |
| 118 | } |
| 119 | |
| 120 | /*check if the socket has been closed while we were in timeout*/ |
| 121 | newfd = (*env)->GetIntField(env, fdObj, IO_fd_fdID); |
| 122 | if (newfd == -1) { |
| 123 | NET_ThrowSocketException(env, "Socket Closed"); |
| 124 | return -1; |
| 125 | } |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | nread = recv(fd, bufP, len, 0); |
| 130 | if (nread > 0) { |
| 131 | (*env)->SetByteArrayRegion(env, data, off, nread, (jbyte *)bufP); |
| 132 | } else { |
| 133 | if (nread < 0) { |
| 134 | /* |
| 135 | * Recv failed. |
| 136 | */ |
| 137 | switch (WSAGetLastError()) { |
| 138 | case WSAEINTR: |
| 139 | JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", |
| 140 | "socket closed"); |
| 141 | break; |
| 142 | |
| 143 | case WSAECONNRESET: |
| 144 | case WSAESHUTDOWN: |
| 145 | /* |
| 146 | * Connection has been reset - Windows sometimes reports |
| 147 | * the reset as a shutdown error. |
| 148 | */ |
| 149 | JNU_ThrowByName(env, "sun/net/ConnectionResetException", |
| 150 | ""); |
| 151 | break; |
| 152 | |
| 153 | case WSAETIMEDOUT : |
| 154 | JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException", |
| 155 | "Read timed out"); |
| 156 | break; |
| 157 | |
| 158 | default: |
| 159 | NET_ThrowCurrent(env, "recv failed"); |
| 160 | } |
| 161 | } |
| 162 | } |
| 163 | if (bufP != BUF) { |
| 164 | free(bufP); |
| 165 | } |
| 166 | return nread; |
| 167 | } |