| /* |
| * Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include "jni.h" |
| #include "jni_util.h" |
| #include "jvm.h" |
| #include "jlong.h" |
| |
| #include <netdb.h> |
| #include <sys/types.h> |
| #include <sys/socket.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <errno.h> |
| |
| #if defined(__linux__) || defined(_ALLBSD_SOURCE) |
| #include <netinet/in.h> |
| #endif |
| |
| #include "net_util.h" |
| #include "net_util_md.h" |
| #include "nio.h" |
| #include "nio_util.h" |
| |
| #include "sun_nio_ch_DatagramChannelImpl.h" |
| |
| static jfieldID dci_senderID; /* sender in sun.nio.ch.DatagramChannelImpl */ |
| static jfieldID dci_senderAddrID; /* sender InetAddress in sun.nio.ch.DatagramChannelImpl */ |
| static jfieldID dci_senderPortID; /* sender port in sun.nio.ch.DatagramChannelImpl */ |
| static jclass isa_class; /* java.net.InetSocketAddress */ |
| static jmethodID isa_ctorID; /* .InetSocketAddress(InetAddress, int) */ |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_DatagramChannelImpl_initIDs(JNIEnv *env, jclass clazz) |
| { |
| clazz = (*env)->FindClass(env, "java/net/InetSocketAddress"); |
| CHECK_NULL(clazz); |
| isa_class = (*env)->NewGlobalRef(env, clazz); |
| if (isa_class == NULL) { |
| JNU_ThrowOutOfMemoryError(env, NULL); |
| return; |
| } |
| isa_ctorID = (*env)->GetMethodID(env, clazz, "<init>", |
| "(Ljava/net/InetAddress;I)V"); |
| CHECK_NULL(isa_ctorID); |
| |
| clazz = (*env)->FindClass(env, "sun/nio/ch/DatagramChannelImpl"); |
| CHECK_NULL(clazz); |
| dci_senderID = (*env)->GetFieldID(env, clazz, "sender", |
| "Ljava/net/SocketAddress;"); |
| CHECK_NULL(dci_senderID); |
| dci_senderAddrID = (*env)->GetFieldID(env, clazz, |
| "cachedSenderInetAddress", |
| "Ljava/net/InetAddress;"); |
| CHECK_NULL(dci_senderAddrID); |
| dci_senderPortID = (*env)->GetFieldID(env, clazz, |
| "cachedSenderPort", "I"); |
| CHECK_NULL(dci_senderPortID); |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_sun_nio_ch_DatagramChannelImpl_disconnect0(JNIEnv *env, jobject this, |
| jobject fdo, jboolean isIPv6) |
| { |
| jint fd = fdval(env, fdo); |
| int rv; |
| |
| #if defined(__solaris__) |
| rv = connect(fd, 0, 0); |
| #else |
| SOCKETADDRESS sa; |
| socklen_t len = isIPv6 ? sizeof(struct sockaddr_in6) : |
| sizeof(struct sockaddr_in); |
| |
| memset(&sa, 0, sizeof(sa)); |
| #if defined(_ALLBSD_SOURCE) |
| sa.sa.sa_family = isIPv6 ? AF_INET6 : AF_INET; |
| #else |
| sa.sa.sa_family = AF_UNSPEC; |
| #endif |
| |
| rv = connect(fd, &sa.sa, len); |
| |
| #if defined(_ALLBSD_SOURCE) |
| if (rv < 0 && errno == EADDRNOTAVAIL) |
| rv = errno = 0; |
| #elif defined(_AIX) |
| /* See W. Richard Stevens, "UNIX Network Programming, Volume 1", p. 254: |
| * 'Setting the address family to AF_UNSPEC might return EAFNOSUPPORT |
| * but that is acceptable. |
| */ |
| if (rv < 0 && errno == EAFNOSUPPORT) |
| rv = errno = 0; |
| #endif // defined(_ALLBSD_SOURCE) || defined(_AIX) |
| |
| #endif // defined(__solaris__) |
| |
| if (rv < 0) |
| handleSocketError(env, errno); |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_DatagramChannelImpl_receive0(JNIEnv *env, jobject this, |
| jobject fdo, jlong address, |
| jint len, jboolean connected) |
| { |
| jint fd = fdval(env, fdo); |
| void *buf = (void *)jlong_to_ptr(address); |
| SOCKETADDRESS sa; |
| socklen_t sa_len = sizeof(SOCKETADDRESS); |
| jboolean retry = JNI_FALSE; |
| jint n = 0; |
| jobject senderAddr; |
| |
| if (len > MAX_PACKET_LEN) { |
| len = MAX_PACKET_LEN; |
| } |
| |
| do { |
| retry = JNI_FALSE; |
| n = recvfrom(fd, buf, len, 0, &sa.sa, &sa_len); |
| if (n < 0) { |
| if (errno == EWOULDBLOCK) { |
| return IOS_UNAVAILABLE; |
| } |
| if (errno == EINTR) { |
| return IOS_INTERRUPTED; |
| } |
| if (errno == ECONNREFUSED) { |
| if (connected == JNI_FALSE) { |
| retry = JNI_TRUE; |
| } else { |
| JNU_ThrowByName(env, JNU_JAVANETPKG |
| "PortUnreachableException", 0); |
| return IOS_THROWN; |
| } |
| } else { |
| return handleSocketError(env, errno); |
| } |
| } |
| } while (retry == JNI_TRUE); |
| |
| /* |
| * If the source address and port match the cached address |
| * and port in DatagramChannelImpl then we don't need to |
| * create InetAddress and InetSocketAddress objects. |
| */ |
| senderAddr = (*env)->GetObjectField(env, this, dci_senderAddrID); |
| if (senderAddr != NULL) { |
| if (!NET_SockaddrEqualsInetAddress(env, &sa, senderAddr)) { |
| senderAddr = NULL; |
| } else { |
| jint port = (*env)->GetIntField(env, this, dci_senderPortID); |
| if (port != NET_GetPortFromSockaddr(&sa)) { |
| senderAddr = NULL; |
| } |
| } |
| } |
| if (senderAddr == NULL) { |
| jobject isa = NULL; |
| int port = 0; |
| jobject ia = NET_SockaddrToInetAddress(env, &sa, &port); |
| if (ia != NULL) { |
| isa = (*env)->NewObject(env, isa_class, isa_ctorID, ia, port); |
| } |
| CHECK_NULL_RETURN(isa, IOS_THROWN); |
| |
| (*env)->SetObjectField(env, this, dci_senderAddrID, ia); |
| (*env)->SetIntField(env, this, dci_senderPortID, |
| NET_GetPortFromSockaddr(&sa)); |
| (*env)->SetObjectField(env, this, dci_senderID, isa); |
| } |
| return n; |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_sun_nio_ch_DatagramChannelImpl_send0(JNIEnv *env, jobject this, |
| jboolean preferIPv6, jobject fdo, jlong address, |
| jint len, jobject destAddress, jint destPort) |
| { |
| jint fd = fdval(env, fdo); |
| void *buf = (void *)jlong_to_ptr(address); |
| SOCKETADDRESS sa; |
| int sa_len = 0; |
| jint n = 0; |
| |
| if (len > MAX_PACKET_LEN) { |
| len = MAX_PACKET_LEN; |
| } |
| |
| if (NET_InetAddressToSockaddr(env, destAddress, destPort, &sa, |
| &sa_len, preferIPv6) != 0) { |
| return IOS_THROWN; |
| } |
| |
| n = sendto(fd, buf, len, 0, &sa.sa, sa_len); |
| if (n < 0) { |
| if (errno == EAGAIN) { |
| return IOS_UNAVAILABLE; |
| } |
| if (errno == EINTR) { |
| return IOS_INTERRUPTED; |
| } |
| if (errno == ECONNREFUSED) { |
| JNU_ThrowByName(env, JNU_JAVANETPKG "PortUnreachableException", 0); |
| return IOS_THROWN; |
| } |
| return handleSocketError(env, errno); |
| } |
| return n; |
| } |