1 /* 2 * Copyright (c) 2002, 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 #include "sun_nio_ch_DatagramDispatcher.h" 34 #include <sys/types.h> 35 #include <sys/uio.h> 36 #include <sys/socket.h> 37 38 #include "nio_util.h" 39 #include <limits.h> 40 41 JNIEXPORT jint JNICALL 42 Java_sun_nio_ch_DatagramDispatcher_read0(JNIEnv *env, jclass clazz, 43 jobject fdo, jlong address, jint len) 44 { 45 jint fd = fdval(env, fdo); 46 void *buf = (void *)jlong_to_ptr(address); 47 int result = recv(fd, buf, len, 0); 48 if (result < 0 && errno == ECONNREFUSED) { 49 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0); 50 return -2; 51 } 52 return convertReturnVal(env, result, JNI_TRUE); 53 } 54 55 56 JNIEXPORT jlong JNICALL 57 Java_sun_nio_ch_DatagramDispatcher_readv0(JNIEnv *env, jclass clazz, 58 jobject fdo, jlong address, jint len) 59 { 60 jint fd = fdval(env, fdo); 61 ssize_t result = 0; 62 struct iovec *iov = (struct iovec *)jlong_to_ptr(address); 63 struct msghdr m; 64 if (len > IOV_MAX) { 65 len = IOV_MAX; 66 } 67 68 // initialize the message 69 memset(&m, 0, sizeof(m)); 70 m.msg_iov = iov; 71 m.msg_iovlen = len; 72 73 result = recvmsg(fd, &m, 0); 74 if (result < 0 && errno == ECONNREFUSED) { 75 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0); 76 return -2; 77 } 78 return convertLongReturnVal(env, (jlong)result, JNI_TRUE); 79 } 80 81 JNIEXPORT jint JNICALL 82 Java_sun_nio_ch_DatagramDispatcher_write0(JNIEnv *env, jclass clazz, 83 jobject fdo, jlong address, jint len) 84 { 85 jint fd = fdval(env, fdo); 86 void *buf = (void *)jlong_to_ptr(address); 87 int result = send(fd, buf, len, 0); 88 if (result < 0 && errno == ECONNREFUSED) { 89 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0); 90 return -2; 91 } 92 return convertReturnVal(env, result, JNI_FALSE); 93 } 94 95 JNIEXPORT jlong JNICALL 96 Java_sun_nio_ch_DatagramDispatcher_writev0(JNIEnv *env, jclass clazz, 97 jobject fdo, jlong address, jint len) 98 { 99 jint fd = fdval(env, fdo); 100 struct iovec *iov = (struct iovec *)jlong_to_ptr(address); 101 struct msghdr m; 102 ssize_t result = 0; 103 if (len > IOV_MAX) { 104 len = IOV_MAX; 105 } 106 107 // initialize the message 108 memset(&m, 0, sizeof(m)); 109 m.msg_iov = iov; 110 m.msg_iovlen = len; 111 112 result = sendmsg(fd, &m, 0); 113 if (result < 0 && errno == ECONNREFUSED) { 114 JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0); 115 return -2; 116 } 117 return convertLongReturnVal(env, (jlong)result, JNI_FALSE); 118 }