J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2003 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 "jni.h" |
| 30 | #include "jni_util.h" |
| 31 | #include "jvm.h" |
| 32 | #include "jlong.h" |
| 33 | #include "sun_nio_ch_SocketChannelImpl.h" |
| 34 | |
| 35 | #include "nio.h" |
| 36 | #include "nio_util.h" |
| 37 | #include "net_util.h" |
| 38 | |
| 39 | |
| 40 | static jfieldID ia_addrID; /* java.net.InetAddress.address */ |
| 41 | |
| 42 | JNIEXPORT void JNICALL |
| 43 | Java_sun_nio_ch_SocketChannelImpl_initIDs(JNIEnv *env, jclass cls) |
| 44 | { |
| 45 | cls = (*env)->FindClass(env, "java/net/InetAddress"); |
| 46 | ia_addrID = (*env)->GetFieldID(env, cls, "address", "I"); |
| 47 | } |
| 48 | |
| 49 | jint |
| 50 | handleSocketError(JNIEnv *env, int errorValue) |
| 51 | { |
| 52 | NET_ThrowNew(env, errorValue, NULL); |
| 53 | return IOS_THROWN; |
| 54 | } |
| 55 | |
| 56 | JNIEXPORT jint JNICALL |
| 57 | Java_sun_nio_ch_SocketChannelImpl_checkConnect(JNIEnv *env, jobject this, |
| 58 | jobject fdo, jboolean block, |
| 59 | jboolean ready) |
| 60 | { |
| 61 | int optError = 0; |
| 62 | int lastError = 0; |
| 63 | int result = 0; |
| 64 | int retry = 0; |
| 65 | int n = sizeof(int); |
| 66 | jint fd = fdval(env, fdo); |
| 67 | fd_set wr, ex; |
| 68 | struct timeval t = { 0, 0 }; |
| 69 | |
| 70 | FD_ZERO(&wr); |
| 71 | FD_ZERO(&ex); |
| 72 | FD_SET((u_int)fd, &wr); |
| 73 | FD_SET((u_int)fd, &ex); |
| 74 | |
| 75 | result = select(fd+1, 0, &wr, &ex, block ? NULL : &t); |
| 76 | |
| 77 | /* save last winsock error */ |
| 78 | if (result == SOCKET_ERROR) { |
| 79 | lastError = WSAGetLastError(); |
| 80 | } |
| 81 | |
| 82 | if (block) { /* must configure socket back to blocking state */ |
| 83 | u_long argp = 0; |
| 84 | int r = ioctlsocket(fd, FIONBIO, &argp); |
| 85 | if (r == SOCKET_ERROR) { |
| 86 | handleSocketError(env, WSAGetLastError()); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | if (result == 0) { /* timeout */ |
| 91 | return block ? 0 : IOS_UNAVAILABLE; |
| 92 | } else { |
| 93 | if (result == SOCKET_ERROR) { /* select failed */ |
| 94 | handleSocketError(env, lastError); |
| 95 | return IOS_THROWN; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | /* |
| 100 | * Socket is writable or error occured. On some Windows editions |
| 101 | * the socket will appear writable when the connect fails so we |
| 102 | * check for error rather than writable. |
| 103 | */ |
| 104 | if (!FD_ISSET(fd, &ex)) { |
| 105 | return 1; /* connection established */ |
| 106 | } |
| 107 | |
| 108 | /* |
| 109 | * A getsockopt( SO_ERROR ) may indicate success on NT4 even |
| 110 | * though the connection has failed. The workaround is to allow |
| 111 | * winsock to be scheduled and this is done via by yielding. |
| 112 | * As the yield approach is problematic in heavy load situations |
| 113 | * we attempt up to 3 times to get the failure reason. |
| 114 | */ |
| 115 | for (retry=0; retry<3; retry++) { |
| 116 | result = getsockopt((SOCKET)fd, |
| 117 | SOL_SOCKET, |
| 118 | SO_ERROR, |
| 119 | (char *)&optError, |
| 120 | &n); |
| 121 | if (result == SOCKET_ERROR) { |
| 122 | int lastError = WSAGetLastError(); |
| 123 | if (lastError == WSAEINPROGRESS) { |
| 124 | return IOS_UNAVAILABLE; |
| 125 | } |
| 126 | NET_ThrowNew(env, lastError, "getsockopt"); |
| 127 | return IOS_THROWN; |
| 128 | } |
| 129 | if (optError) { |
| 130 | break; |
| 131 | } |
| 132 | Sleep(0); |
| 133 | } |
| 134 | |
| 135 | if (optError != NO_ERROR) { |
| 136 | handleSocketError(env, optError); |
| 137 | return IOS_THROWN; |
| 138 | } |
| 139 | |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | JNIEXPORT void JNICALL |
| 144 | Java_sun_nio_ch_SocketChannelImpl_shutdown(JNIEnv *env, jclass cl, |
| 145 | jobject fdo, jint how) |
| 146 | { |
| 147 | if (shutdown(fdval(env, fdo), how) == SOCKET_ERROR) { |
| 148 | NET_ThrowNew(env, WSAGetLastError(), "shutdown"); |
| 149 | } |
| 150 | } |