| /* |
| * Copyright (c) 1997, 2017, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| #include <errno.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "jvm.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); |
| } |
| |
| static int NET_ReadWithTimeout(JNIEnv *env, int fd, char *bufP, int len, long timeout) { |
| int result = 0; |
| jlong prevNanoTime = JVM_NanoTime(env, 0); |
| jlong nanoTimeout = (jlong) timeout * NET_NSEC_PER_MSEC; |
| while (nanoTimeout >= NET_NSEC_PER_MSEC) { |
| result = NET_Timeout(env, fd, nanoTimeout / NET_NSEC_PER_MSEC, prevNanoTime); |
| if (result <= 0) { |
| if (result == 0) { |
| JNU_ThrowByName(env, "java/net/SocketTimeoutException", "Read timed out"); |
| } else if (result == -1) { |
| if (errno == EBADF) { |
| JNU_ThrowByName(env, "java/net/SocketException", "Socket closed"); |
| } else if (errno == ENOMEM) { |
| JNU_ThrowOutOfMemoryError(env, "NET_Timeout native heap allocation failed"); |
| } else { |
| JNU_ThrowByNameWithMessageAndLastError |
| (env, "java/net/SocketException", "select/poll failed"); |
| } |
| } |
| return -1; |
| } |
| result = NET_NonBlockingRead(fd, bufP, len); |
| if (result == -1 && ((errno == EAGAIN) || (errno == EWOULDBLOCK))) { |
| jlong newtNanoTime = JVM_NanoTime(env, 0); |
| nanoTimeout -= newtNanoTime - prevNanoTime; |
| if (nanoTimeout >= NET_NSEC_PER_MSEC) { |
| prevNanoTime = newtNanoTime; |
| } |
| } else { |
| break; |
| } |
| } |
| return result; |
| } |
| |
| /* |
| * 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)) { |
| JNU_ThrowByName(env, "java/net/SocketException", |
| "Socket closed"); |
| return -1; |
| } |
| fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID); |
| 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_ReadWithTimeout(env, fd, bufP, len, timeout); |
| if ((*env)->ExceptionCheck(env)) { |
| if (bufP != BUF) { |
| free(bufP); |
| } |
| return nread; |
| } |
| } else { |
| 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, "java/net/SocketException", |
| "Socket closed"); |
| break; |
| |
| case EINTR: |
| JNU_ThrowByName(env, "java/io/InterruptedIOException", |
| "Operation interrupted"); |
| break; |
| default: |
| JNU_ThrowByNameWithMessageAndLastError |
| (env, "java/net/SocketException", "Read failed"); |
| } |
| } |
| } else { |
| (*env)->SetByteArrayRegion(env, data, off, nread, (jbyte *)bufP); |
| } |
| |
| if (bufP != BUF) { |
| free(bufP); |
| } |
| return nread; |
| } |