mirror of
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126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/*
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* Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include "net_util.h"
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#include "java_net_SocketOutputStream.h"
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#define min(a, b) ((a) < (b) ? (a) : (b))
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/*
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* SocketOutputStream
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*/
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static jfieldID IO_fd_fdID;
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/*
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* Class: java_net_SocketOutputStream
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* Method: init
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* Signature: ()V
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*/
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JNIEXPORT void JNICALL
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Java_java_net_SocketOutputStream_init(JNIEnv *env, jclass cls) {
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IO_fd_fdID = NET_GetFileDescriptorID(env);
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}
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/*
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* Class: java_net_SocketOutputStream
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* Method: socketWrite0
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* Signature: (Ljava/io/FileDescriptor;[BII)V
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*/
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JNIEXPORT void JNICALL
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Java_java_net_SocketOutputStream_socketWrite0(JNIEnv *env, jobject this,
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jobject fdObj,
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jbyteArray data,
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jint off, jint len) {
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char *bufP;
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char BUF[MAX_BUFFER_LEN];
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int buflen;
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int fd;
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if (IS_NULL(fdObj)) {
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JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
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return;
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} else {
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fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
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/* Bug 4086704 - If the Socket associated with this file descriptor
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* was closed (sysCloseFD), the file descriptor is set to -1.
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*/
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if (fd == -1) {
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JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
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return;
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}
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}
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if (len <= MAX_BUFFER_LEN) {
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bufP = BUF;
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buflen = MAX_BUFFER_LEN;
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} else {
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buflen = min(MAX_HEAP_BUFFER_LEN, len);
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bufP = (char *)malloc((size_t)buflen);
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/* if heap exhausted resort to stack buffer */
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if (bufP == NULL) {
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bufP = BUF;
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buflen = MAX_BUFFER_LEN;
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}
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}
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while(len > 0) {
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int loff = 0;
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int chunkLen = min(buflen, len);
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int llen = chunkLen;
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(*env)->GetByteArrayRegion(env, data, off, chunkLen, (jbyte *)bufP);
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if ((*env)->ExceptionCheck(env)) {
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break;
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} else {
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while(llen > 0) {
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int n = NET_Send(fd, bufP + loff, llen, 0);
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if (n > 0) {
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llen -= n;
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loff += n;
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continue;
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}
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JNU_ThrowByNameWithMessageAndLastError
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(env, "java/net/SocketException", "Write failed");
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if (bufP != BUF) {
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free(bufP);
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}
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return;
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}
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len -= chunkLen;
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off += chunkLen;
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}
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}
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if (bufP != BUF) {
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free(bufP);
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}
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}
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