1 /* 2 * Copyright (c) 1997, 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 <stdlib.h> 27 #include <errno.h> 28 #include <string.h> 29 #include <sys/types.h> 30 #include <sys/socket.h> 31 32 #include "jni_util.h" 33 #include "jvm.h" 34 #include "net_util.h" 35 36 #include "java_net_SocketOutputStream.h" 37 38 #define min(a, b) ((a) < (b) ? (a) : (b)) 39 40 /* 41 * SocketOutputStream 42 */ 43 44 static jfieldID IO_fd_fdID; 45 46 /* 47 * Class: java_net_SocketOutputStream 48 * Method: init 49 * Signature: ()V 50 */ 51 JNIEXPORT void JNICALL 52 Java_java_net_SocketOutputStream_init(JNIEnv *env, jclass cls) { 53 IO_fd_fdID = NET_GetFileDescriptorID(env); 54 } 55 56 /* 57 * Class: java_net_SocketOutputStream 58 * Method: socketWrite0 59 * Signature: (Ljava/io/FileDescriptor;[BII)V 60 */ 61 JNIEXPORT void JNICALL 62 Java_java_net_SocketOutputStream_socketWrite0(JNIEnv *env, jobject this, 63 jobject fdObj, 64 jbyteArray data, 65 jint off, jint len) { 66 char *bufP; 67 char BUF[MAX_BUFFER_LEN]; 68 int buflen; 69 int fd; 70 71 if (IS_NULL(fdObj)) { 72 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed"); 73 return; 74 } else { 75 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID); 76 /* Bug 4086704 - If the Socket associated with this file descriptor 77 * was closed (sysCloseFD), the file descriptor is set to -1. 78 */ 79 if (fd == -1) { 80 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed"); 81 return; 82 } 83 84 } 85 86 if (len <= MAX_BUFFER_LEN) { 87 bufP = BUF; 88 buflen = MAX_BUFFER_LEN; 89 } else { 90 buflen = min(MAX_HEAP_BUFFER_LEN, len); 91 bufP = (char *)malloc((size_t)buflen); 92 93 /* if heap exhausted resort to stack buffer */ 94 if (bufP == NULL) { 95 bufP = BUF; 96 buflen = MAX_BUFFER_LEN; 97 } 98 } 99 100 while(len > 0) { 101 int loff = 0; 102 int chunkLen = min(buflen, len); 103 int llen = chunkLen; 104 (*env)->GetByteArrayRegion(env, data, off, chunkLen, (jbyte *)bufP); 105 106 while(llen > 0) { 107 int n = NET_Send(fd, bufP + loff, llen, 0); 108 if (n > 0) { 109 llen -= n; 110 loff += n; 111 continue; 112 } 113 if (errno == ECONNRESET) { 114 JNU_ThrowByName(env, "sun/net/ConnectionResetException", 115 "Connection reset"); 116 } else { 117 NET_ThrowByNameWithLastError(env, "java/net/SocketException", 118 "Write failed"); 119 } 120 if (bufP != BUF) { 121 free(bufP); 122 } 123 return; 124 } 125 len -= chunkLen; 126 off += chunkLen; 127 } 128 129 if (bufP != BUF) { 130 free(bufP); 131 } 132 }