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/*
* Copyright 2000-2003 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
#include <windows.h>
#include <winsock2.h>
#include <ctype.h>
#include "jni.h"
#include "jni_util.h"
#include "jvm.h"
#include "jlong.h"
#include "sun_nio_ch_SocketChannelImpl.h"
#include "nio.h"
#include "nio_util.h"
#include "net_util.h"
static jfieldID ia_addrID; /* java.net.InetAddress.address */
JNIEXPORT void JNICALL
Java_sun_nio_ch_SocketChannelImpl_initIDs(JNIEnv *env, jclass cls)
{
cls = (*env)->FindClass(env, "java/net/InetAddress");
ia_addrID = (*env)->GetFieldID(env, cls, "address", "I");
}
jint
handleSocketError(JNIEnv *env, int errorValue)
{
NET_ThrowNew(env, errorValue, NULL);
return IOS_THROWN;
}
JNIEXPORT jint JNICALL
Java_sun_nio_ch_SocketChannelImpl_checkConnect(JNIEnv *env, jobject this,
jobject fdo, jboolean block,
jboolean ready)
{
int optError = 0;
int lastError = 0;
int result = 0;
int retry = 0;
int n = sizeof(int);
jint fd = fdval(env, fdo);
fd_set wr, ex;
struct timeval t = { 0, 0 };
FD_ZERO(&wr);
FD_ZERO(&ex);
FD_SET((u_int)fd, &wr);
FD_SET((u_int)fd, &ex);
result = select(fd+1, 0, &wr, &ex, block ? NULL : &t);
/* save last winsock error */
if (result == SOCKET_ERROR) {
lastError = WSAGetLastError();
}
if (block) { /* must configure socket back to blocking state */
u_long argp = 0;
int r = ioctlsocket(fd, FIONBIO, &argp);
if (r == SOCKET_ERROR) {
handleSocketError(env, WSAGetLastError());
}
}
if (result == 0) { /* timeout */
return block ? 0 : IOS_UNAVAILABLE;
} else {
if (result == SOCKET_ERROR) { /* select failed */
handleSocketError(env, lastError);
return IOS_THROWN;
}
}
/*
* Socket is writable or error occured. On some Windows editions
* the socket will appear writable when the connect fails so we
* check for error rather than writable.
*/
if (!FD_ISSET(fd, &ex)) {
return 1; /* connection established */
}
/*
* A getsockopt( SO_ERROR ) may indicate success on NT4 even
* though the connection has failed. The workaround is to allow
* winsock to be scheduled and this is done via by yielding.
* As the yield approach is problematic in heavy load situations
* we attempt up to 3 times to get the failure reason.
*/
for (retry=0; retry<3; retry++) {
result = getsockopt((SOCKET)fd,
SOL_SOCKET,
SO_ERROR,
(char *)&optError,
&n);
if (result == SOCKET_ERROR) {
int lastError = WSAGetLastError();
if (lastError == WSAEINPROGRESS) {
return IOS_UNAVAILABLE;
}
NET_ThrowNew(env, lastError, "getsockopt");
return IOS_THROWN;
}
if (optError) {
break;
}
Sleep(0);
}
if (optError != NO_ERROR) {
handleSocketError(env, optError);
return IOS_THROWN;
}
return 0;
}
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