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/*
* Copyright 1997-2008 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 <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include "jvm.h"
#include "jni_util.h"
#include "net_util.h"
#include "java_net_SocketInputStream.h"
/************************************************************************
* SocketInputStream
*/
static jfieldID IO_fd_fdID;
/*
* Class: java_net_SocketInputStream
* Method: init
* Signature: ()V
*/
JNIEXPORT void JNICALL
Java_java_net_SocketInputStream_init(JNIEnv *env, jclass cls) {
IO_fd_fdID = NET_GetFileDescriptorID(env);
}
/*
* Class: java_net_SocketInputStream
* Method: socketRead0
* Signature: (Ljava/io/FileDescriptor;[BIII)I
*/
JNIEXPORT jint JNICALL
Java_java_net_SocketInputStream_socketRead0(JNIEnv *env, jobject this,
jobject fdObj, jbyteArray data,
jint off, jint len, jint timeout)
{
char BUF[MAX_BUFFER_LEN];
char *bufP;
jint fd, nread;
if (IS_NULL(fdObj)) {
/* should't this be a NullPointerException? -br */
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"Socket closed");
return -1;
} else {
fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
/* Bug 4086704 - If the Socket associated with this file descriptor
* was closed (sysCloseFD), the the file descriptor is set to -1.
*/
if (fd == -1) {
JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
return -1;
}
}
/*
* If the read is greater than our stack allocated buffer then
* we allocate from the heap (up to a limit)
*/
if (len > MAX_BUFFER_LEN) {
if (len > MAX_HEAP_BUFFER_LEN) {
len = MAX_HEAP_BUFFER_LEN;
}
bufP = (char *)malloc((size_t)len);
if (bufP == NULL) {
bufP = BUF;
len = MAX_BUFFER_LEN;
}
} else {
bufP = BUF;
}
if (timeout) {
nread = NET_Timeout(fd, timeout);
if (nread <= 0) {
if (nread == 0) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
"Read timed out");
} else if (nread == JVM_IO_ERR) {
if (errno == EBADF) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
} else {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
"select/poll failed");
}
} else if (nread == JVM_IO_INTR) {
JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException",
"Operation interrupted");
}
if (bufP != BUF) {
free(bufP);
}
return -1;
}
}
nread = NET_Read(fd, bufP, len);
if (nread <= 0) {
if (nread < 0) {
switch (errno) {
case ECONNRESET:
case EPIPE:
JNU_ThrowByName(env, "sun/net/ConnectionResetException",
"Connection reset");
break;
case EBADF:
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"Socket closed");
break;
case EINTR:
JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException",
"Operation interrupted");
break;
default:
NET_ThrowByNameWithLastError(env,
JNU_JAVANETPKG "SocketException", "Read failed");
}
}
} else {
(*env)->SetByteArrayRegion(env, data, off, nread, (jbyte *)bufP);
}
if (bufP != BUF) {
free(bufP);
}
return nread;
}
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