author | alanb |
Fri, 23 Mar 2018 14:18:18 +0000 | |
changeset 49290 | 07779973cbe2 |
parent 47216 | 71c04702a3d5 |
child 50275 | 69204b98dc3d |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2017, 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 "jni.h" |
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#include "jni_util.h" |
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#include "jvm.h" |
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#include "jlong.h" |
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#include <netdb.h> |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <errno.h> |
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#if defined(__linux__) || defined(_ALLBSD_SOURCE) |
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#include <netinet/in.h> |
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#endif |
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#include "net_util.h" |
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#include "net_util_md.h" |
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#include "nio.h" |
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#include "nio_util.h" |
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#include "sun_nio_ch_DatagramChannelImpl.h" |
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static jfieldID dci_senderID; /* sender in sun.nio.ch.DatagramChannelImpl */ |
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static jfieldID dci_senderAddrID; /* sender InetAddress in sun.nio.ch.DatagramChannelImpl */ |
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static jfieldID dci_senderPortID; /* sender port in sun.nio.ch.DatagramChannelImpl */ |
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static jclass isa_class; /* java.net.InetSocketAddress */ |
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static jmethodID isa_ctorID; /* .InetSocketAddress(InetAddress, int) */ |
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JNIEXPORT void JNICALL |
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Java_sun_nio_ch_DatagramChannelImpl_initIDs(JNIEnv *env, jclass clazz) |
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{ |
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clazz = (*env)->FindClass(env, "java/net/InetSocketAddress"); |
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CHECK_NULL(clazz); |
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isa_class = (*env)->NewGlobalRef(env, clazz); |
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if (isa_class == NULL) { |
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JNU_ThrowOutOfMemoryError(env, NULL); |
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return; |
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} |
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isa_ctorID = (*env)->GetMethodID(env, clazz, "<init>", |
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"(Ljava/net/InetAddress;I)V"); |
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CHECK_NULL(isa_ctorID); |
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clazz = (*env)->FindClass(env, "sun/nio/ch/DatagramChannelImpl"); |
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CHECK_NULL(clazz); |
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dci_senderID = (*env)->GetFieldID(env, clazz, "sender", |
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"Ljava/net/SocketAddress;"); |
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CHECK_NULL(dci_senderID); |
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dci_senderAddrID = (*env)->GetFieldID(env, clazz, |
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"cachedSenderInetAddress", |
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"Ljava/net/InetAddress;"); |
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CHECK_NULL(dci_senderAddrID); |
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dci_senderPortID = (*env)->GetFieldID(env, clazz, |
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"cachedSenderPort", "I"); |
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CHECK_NULL(dci_senderPortID); |
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} |
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JNIEXPORT void JNICALL |
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Java_sun_nio_ch_DatagramChannelImpl_disconnect0(JNIEnv *env, jobject this, |
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jobject fdo, jboolean isIPv6) |
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{ |
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jint fd = fdval(env, fdo); |
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int rv; |
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#if defined(__solaris__) |
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rv = connect(fd, 0, 0); |
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#else |
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SOCKETADDRESS sa; |
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socklen_t len = isIPv6 ? sizeof(struct sockaddr_in6) : |
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sizeof(struct sockaddr_in); |
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memset(&sa, 0, sizeof(sa)); |
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#if defined(_ALLBSD_SOURCE) |
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sa.sa.sa_family = isIPv6 ? AF_INET6 : AF_INET; |
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#else |
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sa.sa.sa_family = AF_UNSPEC; |
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#endif |
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rv = connect(fd, &sa.sa, len); |
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#if defined(_ALLBSD_SOURCE) |
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if (rv < 0 && errno == EADDRNOTAVAIL) |
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rv = errno = 0; |
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#elif defined(_AIX) |
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/* See W. Richard Stevens, "UNIX Network Programming, Volume 1", p. 254: |
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* 'Setting the address family to AF_UNSPEC might return EAFNOSUPPORT |
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* but that is acceptable. |
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*/ |
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if (rv < 0 && errno == EAFNOSUPPORT) |
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rv = errno = 0; |
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#endif // defined(_ALLBSD_SOURCE) || defined(_AIX) |
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#endif // defined(__solaris__) |
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if (rv < 0) |
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handleSocketError(env, errno); |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_DatagramChannelImpl_receive0(JNIEnv *env, jobject this, |
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jobject fdo, jlong address, |
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jint len, jboolean connected) |
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{ |
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jint fd = fdval(env, fdo); |
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void *buf = (void *)jlong_to_ptr(address); |
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SOCKETADDRESS sa; |
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socklen_t sa_len = sizeof(SOCKETADDRESS); |
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jboolean retry = JNI_FALSE; |
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jint n = 0; |
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jobject senderAddr; |
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if (len > MAX_PACKET_LEN) { |
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len = MAX_PACKET_LEN; |
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} |
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do { |
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retry = JNI_FALSE; |
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n = recvfrom(fd, buf, len, 0, &sa.sa, &sa_len); |
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if (n < 0) { |
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if (errno == EWOULDBLOCK) { |
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return IOS_UNAVAILABLE; |
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} |
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if (errno == EINTR) { |
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return IOS_INTERRUPTED; |
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} |
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if (errno == ECONNREFUSED) { |
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if (connected == JNI_FALSE) { |
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retry = JNI_TRUE; |
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} else { |
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JNU_ThrowByName(env, JNU_JAVANETPKG |
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"PortUnreachableException", 0); |
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return IOS_THROWN; |
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} |
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} else { |
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return handleSocketError(env, errno); |
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} |
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} |
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} while (retry == JNI_TRUE); |
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/* |
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* If the source address and port match the cached address |
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* and port in DatagramChannelImpl then we don't need to |
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* create InetAddress and InetSocketAddress objects. |
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*/ |
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senderAddr = (*env)->GetObjectField(env, this, dci_senderAddrID); |
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if (senderAddr != NULL) { |
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if (!NET_SockaddrEqualsInetAddress(env, &sa, senderAddr)) { |
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senderAddr = NULL; |
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} else { |
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jint port = (*env)->GetIntField(env, this, dci_senderPortID); |
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if (port != NET_GetPortFromSockaddr(&sa)) { |
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senderAddr = NULL; |
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} |
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} |
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} |
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if (senderAddr == NULL) { |
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jobject isa = NULL; |
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int port = 0; |
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jobject ia = NET_SockaddrToInetAddress(env, &sa, &port); |
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if (ia != NULL) { |
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isa = (*env)->NewObject(env, isa_class, isa_ctorID, ia, port); |
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} |
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CHECK_NULL_RETURN(isa, IOS_THROWN); |
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(*env)->SetObjectField(env, this, dci_senderAddrID, ia); |
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(*env)->SetIntField(env, this, dci_senderPortID, |
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NET_GetPortFromSockaddr(&sa)); |
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(*env)->SetObjectField(env, this, dci_senderID, isa); |
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} |
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return n; |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_DatagramChannelImpl_send0(JNIEnv *env, jobject this, |
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jboolean preferIPv6, jobject fdo, jlong address, |
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jint len, jobject destAddress, jint destPort) |
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{ |
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jint fd = fdval(env, fdo); |
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void *buf = (void *)jlong_to_ptr(address); |
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SOCKETADDRESS sa; |
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int sa_len = 0; |
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jint n = 0; |
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if (len > MAX_PACKET_LEN) { |
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len = MAX_PACKET_LEN; |
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} |
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if (NET_InetAddressToSockaddr(env, destAddress, destPort, &sa, |
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&sa_len, preferIPv6) != 0) { |
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return IOS_THROWN; |
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} |
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n = sendto(fd, buf, len, 0, &sa.sa, sa_len); |
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if (n < 0) { |
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if (errno == EAGAIN) { |
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221 |
return IOS_UNAVAILABLE; |
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222 |
} |
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223 |
if (errno == EINTR) { |
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224 |
return IOS_INTERRUPTED; |
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225 |
} |
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if (errno == ECONNREFUSED) { |
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JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0); |
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return IOS_THROWN; |
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229 |
} |
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return handleSocketError(env, errno); |
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231 |
} |
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232 |
return n; |
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233 |
} |