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/*
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* Copyright 2001-2007 Sun Microsystems, Inc. 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. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any 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 __linux__
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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 isa_addrID; /* address in java.net.InetSocketAddress */
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static jfieldID isa_portID; /* port in java.net.InetSocketAddress */
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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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isa_class = (*env)->NewGlobalRef(env, clazz);
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isa_ctorID = (*env)->GetMethodID(env, clazz, "<init>",
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"(Ljava/net/InetAddress;I)V");
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isa_addrID = (*env)->GetFieldID(env, clazz, "addr",
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"Ljava/net/InetAddress;");
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isa_portID = (*env)->GetFieldID(env, clazz, "port", "I");
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clazz = (*env)->FindClass(env, "sun/nio/ch/DatagramChannelImpl");
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dci_senderID = (*env)->GetFieldID(env, clazz, "sender",
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"Ljava/net/SocketAddress;");
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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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dci_senderPortID = (*env)->GetFieldID(env, clazz,
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"cachedSenderPort", "I");
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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)
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{
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jint fd = fdval(env, fdo);
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int rv;
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#ifdef __solaris__
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rv = connect(fd, 0, 0);
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#endif
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#ifdef __linux__
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{
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int len;
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SOCKADDR sa;
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memset(&sa, 0, sizeof(sa));
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#ifdef AF_INET6
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if (ipv6_available()) {
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struct sockaddr_in6 *him6 = (struct sockaddr_in6 *)&sa;
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him6->sin6_family = AF_UNSPEC;
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len = sizeof(struct sockaddr_in6);
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} else
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#endif
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{
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struct sockaddr_in *him4 = (struct sockaddr_in*)&sa;
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him4->sin_family = AF_UNSPEC;
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len = sizeof(struct sockaddr_in);
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}
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rv = connect(fd, (struct sockaddr *)&sa, len);
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}
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#endif
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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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SOCKADDR sa;
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int sa_len = SOCKADDR_LEN;
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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, (struct sockaddr *)&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, (struct sockaddr *)&sa,
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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((struct sockaddr *)&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;
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jobject ia = NET_SockaddrToInetAddress(env, (struct sockaddr *)&sa,
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&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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if (isa == NULL) {
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JNU_ThrowOutOfMemoryError(env, "heap allocation failed");
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return IOS_THROWN;
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}
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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((struct sockaddr *)&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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jobject fdo, jlong address,
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jint len, jobject dest)
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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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SOCKADDR sa;
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int sa_len = SOCKADDR_LEN;
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jint n = 0;
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jobject destAddress = (*env)->GetObjectField(env, dest, isa_addrID);
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jint destPort = (*env)->GetIntField(env, dest, isa_portID);
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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,
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(struct sockaddr *)&sa,
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&sa_len, JNI_TRUE) != 0) {
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return IOS_THROWN;
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}
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n = sendto(fd, buf, len, 0, (struct sockaddr *)&sa, sa_len);
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if (n < 0) {
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if (errno == EAGAIN) {
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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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JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0);
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return IOS_THROWN;
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}
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return handleSocketError(env, errno);
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}
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return n;
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}
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