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 <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 "jni.h"
  35 #include "jni_util.h"
  36 #include "jvm.h"
  37 #include "jlong.h"
  38 
  39 #include "nio.h"
  40 #include "nio_util.h"
  41 #include "net_util.h"
  42 
  43 #include "sun_nio_ch_ServerSocketChannelImpl.h"
  44 
  45 
  46 static jfieldID fd_fdID;        /* java.io.FileDescriptor.fd */
  47 static jclass isa_class;        /* java.net.InetSocketAddress */
  48 static jmethodID isa_ctorID;    /* InetSocketAddress(InetAddress, int) */
  49 
  50 
  51 /**************************************************************
  52  * static method to store field IDs in initializers
  53  */
  54 
  55 JNIEXPORT void JNICALL
  56 Java_sun_nio_ch_ServerSocketChannelImpl_initIDs(JNIEnv *env, jclass cls)
  57 {
  58     cls = (*env)->FindClass(env, "java/io/FileDescriptor");
  59     fd_fdID = (*env)->GetFieldID(env, cls, "fd", "I");
  60 
  61     cls = (*env)->FindClass(env, "java/net/InetSocketAddress");
  62     isa_class = (*env)->NewGlobalRef(env, cls);
  63     isa_ctorID = (*env)->GetMethodID(env, cls, "<init>",
  64                                      "(Ljava/net/InetAddress;I)V");
  65 }
  66 
  67 JNIEXPORT void JNICALL
  68 Java_sun_nio_ch_ServerSocketChannelImpl_listen(JNIEnv *env, jclass cl,
  69                                                jobject fdo, jint backlog)
  70 {
  71     if (listen(fdval(env,fdo), backlog) == SOCKET_ERROR) {
  72         NET_ThrowNew(env, WSAGetLastError(), "listen");
  73     }
  74 }
  75 
  76 JNIEXPORT jint JNICALL
  77 Java_sun_nio_ch_ServerSocketChannelImpl_accept0(JNIEnv *env, jobject this,
  78                                                 jobject ssfdo, jobject newfdo,
  79                                                 jobjectArray isaa)
  80 {
  81     jint ssfd = (*env)->GetIntField(env, ssfdo, fd_fdID);
  82     jint newfd;
  83     SOCKETADDRESS sa;
  84     jobject remote_ia;
  85     int remote_port;
  86     jobject isa;
  87     int addrlen = sizeof(sa);
  88 
  89     memset((char *)&sa, 0, sizeof(sa));
  90     newfd = (jint)accept(ssfd, (struct sockaddr *)&sa, &addrlen);
  91     if (newfd == INVALID_SOCKET) {
  92         int theErr = (jint)WSAGetLastError();
  93         if (theErr == WSAEWOULDBLOCK) {
  94             return IOS_UNAVAILABLE;
  95         }
  96         JNU_ThrowIOExceptionWithLastError(env, "Accept failed");
  97         return IOS_THROWN;
  98     }
  99 
 100     (*env)->SetIntField(env, newfdo, fd_fdID, newfd);
 101     remote_ia = NET_SockaddrToInetAddress(env, (struct sockaddr *)&sa, (int *)&remote_port);
 102 
 103     isa = (*env)->NewObject(env, isa_class, isa_ctorID,
 104                             remote_ia, remote_port);
 105     (*env)->SetObjectArrayElement(env, isaa, 0, isa);
 106 
 107     return 1;
 108 }