1 /* 2 * Copyright (c) 2000, 2008, 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 #include <stdlib.h> 27 #include <netdb.h> 28 #include <sys/types.h> 29 #include <sys/socket.h> 30 31 #if __linux__ 32 #include <netinet/in.h> 33 #endif 34 35 #if defined(__solaris__) && !defined(_SOCKLEN_T) 36 typedef size_t socklen_t; /* New in SunOS 5.7, so need this for 5.6 */ 37 #endif 38 39 #include "jni.h" 40 #include "jni_util.h" 41 #include "net_util.h" 42 #include "jvm.h" 43 #include "jlong.h" 44 #include "sun_nio_ch_ServerSocketChannelImpl.h" 45 #include "nio.h" 46 #include "nio_util.h" 47 48 #include "JNIHelp.h" 49 50 51 #define NATIVE_METHOD(className, functionName, signature) \ 52 { #functionName, signature, (void*)(className ## _ ## functionName) } 53 54 55 static jfieldID fd_fdID; /* java.io.FileDescriptor.fd */ 56 static jclass isa_class; /* java.net.InetSocketAddress */ 57 static jmethodID isa_ctorID; /* .InetSocketAddress(InetAddress, int) */ 58 59 60 JNIEXPORT void JNICALL 61 ServerSocketChannelImpl_initIDs(JNIEnv *env, jclass c) 62 { 63 jclass cls; 64 65 cls = (*env)->FindClass(env, "java/io/FileDescriptor"); 66 fd_fdID = (*env)->GetFieldID(env, cls, "descriptor", "I"); 67 68 cls = (*env)->FindClass(env, "java/net/InetSocketAddress"); 69 isa_class = (*env)->NewGlobalRef(env, cls); 70 isa_ctorID = (*env)->GetMethodID(env, cls, "<init>", 71 "(Ljava/net/InetAddress;I)V"); 72 } 73 74 JNIEXPORT jint JNICALL 75 ServerSocketChannelImpl_accept0(JNIEnv *env, jobject this, 76 jobject ssfdo, jobject newfdo, 77 jobjectArray isaa) 78 { 79 jint ssfd = (*env)->GetIntField(env, ssfdo, fd_fdID); 80 jint newfd; 81 struct sockaddr *sa; 82 int alloc_len; 83 jobject remote_ia = 0; 84 jobject isa; 85 jint remote_port; 86 87 NET_AllocSockaddr(&sa, &alloc_len); 88 89 /* 90 * accept connection but ignore ECONNABORTED indicating that 91 * a connection was eagerly accepted but was reset before 92 * accept() was called. 93 */ 94 for (;;) { 95 socklen_t sa_len = alloc_len; 96 newfd = accept(ssfd, sa, &sa_len); 97 if (newfd >= 0) { 98 break; 99 } 100 if (errno != ECONNABORTED) { 101 break; 102 } 103 /* ECONNABORTED => restart accept */ 104 } 105 106 if (newfd < 0) { 107 free((void *)sa); 108 if (errno == EAGAIN) 109 return IOS_UNAVAILABLE; 110 if (errno == EINTR) 111 return IOS_INTERRUPTED; 112 JNU_ThrowIOExceptionWithLastError(env, "Accept failed"); 113 return IOS_THROWN; 114 } 115 116 (*env)->SetIntField(env, newfdo, fd_fdID, newfd); 117 remote_ia = NET_SockaddrToInetAddress(env, sa, (int *)&remote_port); 118 free((void *)sa); 119 isa = (*env)->NewObject(env, isa_class, isa_ctorID, 120 remote_ia, remote_port); 121 (*env)->SetObjectArrayElement(env, isaa, 0, isa); 122 return 1; 123 } 124 125 126 127 static JNINativeMethod gMethods[] = { 128 NATIVE_METHOD(ServerSocketChannelImpl, initIDs, "()V"), 129 NATIVE_METHOD(ServerSocketChannelImpl, accept0, 130 "(Ljava/io/FileDescriptor;Ljava/io/FileDescriptor;[Ljava/net/InetSocketAddress;)I"), 131 }; 132 133 void register_sun_nio_ch_ServerSocketChannelImpl(JNIEnv* env) { 134 jniRegisterNativeMethods(env, "sun/nio/ch/ServerSocketChannelImpl", gMethods, NELEM(gMethods)); 135 } 136