1 /* 2 * Copyright (c) 2002, 2012, 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 /* 27 */ 28 29 #include "jni.h" 30 #include "jni_util.h" 31 #include "jvm.h" 32 #include "jlong.h" 33 // Android removed. 34 // 35 #include <unistd.h> 36 #include <sys/types.h> 37 #include <sys/uio.h> 38 #include <sys/socket.h> 39 #include <string.h> 40 41 #include "nio_util.h" 42 #include <limits.h> 43 44 #include "nio.h" 45 #include <nativehelper/JNIHelp.h> 46 47 #define NATIVE_METHOD(className, functionName, signature) \ 48 { #functionName, signature, (void*)(Java_sun_nio_ch_ ## className ## _ ## functionName) } 49 50 JNIEXPORT jint JNICALL 51 Java_sun_nio_ch_DatagramDispatcher_read0(JNIEnv *env, jclass clazz, 52 jobject fdo, jlong address, jint len) 53 { 54 jint fd = fdval(env, fdo); 55 void *buf = (void *)jlong_to_ptr(address); 56 int result = recv(fd, buf, len, 0); 57 if (result < 0 && errno == ECONNREFUSED) { 58 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0); 59 return -2; 60 } 61 return convertReturnVal(env, result, JNI_TRUE); 62 } 63 64 // Android-changed : Use sysconf for IOV_MAX. 65 static int iov_max = -1; 66 67 JNIEXPORT jlong JNICALL 68 Java_sun_nio_ch_DatagramDispatcher_readv0(JNIEnv *env, jclass clazz, 69 jobject fdo, jlong address, jint len) 70 { 71 jint fd = fdval(env, fdo); 72 ssize_t result = 0; 73 struct iovec *iov = (struct iovec *)jlong_to_ptr(address); 74 struct msghdr m; 75 76 // Android-changed : Use sysconf for IOV_MAX. 77 if (iov_max == -1) { 78 iov_max = sysconf(_SC_IOV_MAX); 79 } 80 if (len > iov_max) { 81 len = iov_max; 82 } 83 84 // initialize the message 85 memset(&m, 0, sizeof(m)); 86 m.msg_iov = iov; 87 m.msg_iovlen = len; 88 89 result = recvmsg(fd, &m, 0); 90 if (result < 0 && errno == ECONNREFUSED) { 91 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0); 92 return -2; 93 } 94 return convertLongReturnVal(env, (jlong)result, JNI_TRUE); 95 } 96 97 JNIEXPORT jint JNICALL 98 Java_sun_nio_ch_DatagramDispatcher_write0(JNIEnv *env, jclass clazz, 99 jobject fdo, jlong address, jint len) 100 { 101 jint fd = fdval(env, fdo); 102 void *buf = (void *)jlong_to_ptr(address); 103 int result = send(fd, buf, len, 0); 104 if (result < 0 && errno == ECONNREFUSED) { 105 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0); 106 return -2; 107 } 108 return convertReturnVal(env, result, JNI_FALSE); 109 } 110 111 JNIEXPORT jlong JNICALL 112 Java_sun_nio_ch_DatagramDispatcher_writev0(JNIEnv *env, jclass clazz, 113 jobject fdo, jlong address, jint len) 114 { 115 jint fd = fdval(env, fdo); 116 struct iovec *iov = (struct iovec *)jlong_to_ptr(address); 117 struct msghdr m; 118 ssize_t result = 0; 119 120 // Android-changed : Use sysconf for IOV_MAX. 121 if (iov_max == -1) { 122 iov_max = sysconf(_SC_IOV_MAX); 123 } 124 125 if (len > iov_max) { 126 len = iov_max; 127 } 128 129 // initialize the message 130 memset(&m, 0, sizeof(m)); 131 m.msg_iov = iov; 132 m.msg_iovlen = len; 133 134 result = sendmsg(fd, &m, 0); 135 if (result < 0 && errno == ECONNREFUSED) { 136 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0); 137 return -2; 138 } 139 return convertLongReturnVal(env, (jlong)result, JNI_FALSE); 140 } 141 142 static JNINativeMethod gMethods[] = { 143 NATIVE_METHOD(DatagramDispatcher, read0, "(Ljava/io/FileDescriptor;JI)I"), 144 NATIVE_METHOD(DatagramDispatcher, readv0, "(Ljava/io/FileDescriptor;JI)J"), 145 NATIVE_METHOD(DatagramDispatcher, write0, "(Ljava/io/FileDescriptor;JI)I"), 146 NATIVE_METHOD(DatagramDispatcher, writev0, "(Ljava/io/FileDescriptor;JI)J"), 147 }; 148 149 void register_sun_nio_ch_DatagramDispatcher(JNIEnv* env) { 150 jniRegisterNativeMethods(env, "sun/nio/ch/DatagramDispatcher", gMethods, NELEM(gMethods)); 151 } 152
