Java example source code file (PlainSocketImpl.c)
The PlainSocketImpl.c Java example source code/*
* Copyright (c) 1997, 2012, 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 <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#if defined(__linux__) && !defined(USE_SELECT)
#include <sys/poll.h>
#endif
#include <netinet/tcp.h> /* Defines TCP_NODELAY, needed for 2.6 */
#include <netinet/in.h>
#ifdef __linux__
#include <netinet/ip.h>
#endif
#include <netdb.h>
#include <stdlib.h>
#ifdef __solaris__
#include <fcntl.h>
#endif
#ifdef __linux__
#include <unistd.h>
#include <sys/sysctl.h>
#endif
#include "jvm.h"
#include "jni_util.h"
#include "net_util.h"
#include "java_net_SocketOptions.h"
#include "java_net_PlainSocketImpl.h"
/************************************************************************
* PlainSocketImpl
*/
static jfieldID IO_fd_fdID;
jfieldID psi_fdID;
jfieldID psi_addressID;
jfieldID psi_ipaddressID;
jfieldID psi_portID;
jfieldID psi_localportID;
jfieldID psi_timeoutID;
jfieldID psi_trafficClassID;
jfieldID psi_serverSocketID;
jfieldID psi_fdLockID;
jfieldID psi_closePendingID;
extern void setDefaultScopeID(JNIEnv *env, struct sockaddr *him);
/*
* file descriptor used for dup2
*/
static int marker_fd = -1;
#define SET_NONBLOCKING(fd) { \
int flags = fcntl(fd, F_GETFL); \
flags |= O_NONBLOCK; \
fcntl(fd, F_SETFL, flags); \
}
#define SET_BLOCKING(fd) { \
int flags = fcntl(fd, F_GETFL); \
flags &= ~O_NONBLOCK; \
fcntl(fd, F_SETFL, flags); \
}
/*
* Create the marker file descriptor by establishing a loopback connection
* which we shutdown but do not close the fd. The result is an fd that
* can be used for read/write.
*/
static int getMarkerFD()
{
int sv[2];
#ifdef AF_UNIX
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sv) == -1) {
return -1;
}
#else
return -1;
#endif
/*
* Finally shutdown sv[0] (any reads to this fd will get
* EOF; any writes will get an error).
*/
JVM_SocketShutdown(sv[0], 2);
JVM_SocketClose(sv[1]);
return sv[0];
}
/*
* Return the file descriptor given a PlainSocketImpl
*/
static int getFD(JNIEnv *env, jobject this) {
jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
CHECK_NULL_RETURN(fdObj, -1);
return (*env)->GetIntField(env, fdObj, IO_fd_fdID);
}
/*
* The initroto function is called whenever PlainSocketImpl is
* loaded, to cache field IDs for efficiency. This is called every time
* the Java class is loaded.
*
* Class: java_net_PlainSocketImpl
* Method: initProto
* Signature: ()V
*/
JNIEXPORT void JNICALL
Java_java_net_PlainSocketImpl_initProto(JNIEnv *env, jclass cls) {
psi_fdID = (*env)->GetFieldID(env, cls , "fd",
"Ljava/io/FileDescriptor;");
CHECK_NULL(psi_fdID);
psi_addressID = (*env)->GetFieldID(env, cls, "address",
"Ljava/net/InetAddress;");
CHECK_NULL(psi_addressID);
psi_portID = (*env)->GetFieldID(env, cls, "port", "I");
CHECK_NULL(psi_portID);
psi_localportID = (*env)->GetFieldID(env, cls, "localport", "I");
CHECK_NULL(psi_localportID);
psi_timeoutID = (*env)->GetFieldID(env, cls, "timeout", "I");
CHECK_NULL(psi_timeoutID);
psi_trafficClassID = (*env)->GetFieldID(env, cls, "trafficClass", "I");
CHECK_NULL(psi_trafficClassID);
psi_serverSocketID = (*env)->GetFieldID(env, cls, "serverSocket",
"Ljava/net/ServerSocket;");
CHECK_NULL(psi_serverSocketID);
psi_fdLockID = (*env)->GetFieldID(env, cls, "fdLock",
"Ljava/lang/Object;");
CHECK_NULL(psi_fdLockID);
psi_closePendingID = (*env)->GetFieldID(env, cls, "closePending", "Z");
CHECK_NULL(psi_closePendingID);
IO_fd_fdID = NET_GetFileDescriptorID(env);
CHECK_NULL(IO_fd_fdID);
/* Create the marker fd used for dup2 */
marker_fd = getMarkerFD();
}
/* a global reference to the java.net.SocketException class. In
* socketCreate, we ensure that this is initialized. This is to
* prevent the problem where socketCreate runs out of file
* descriptors, and is then unable to load the exception class.
*/
static jclass socketExceptionCls;
/*
* Class: java_net_PlainSocketImpl
* Method: socketCreate
* Signature: (Z)V */
JNIEXPORT void JNICALL
Java_java_net_PlainSocketImpl_socketCreate(JNIEnv *env, jobject this,
jboolean stream) {
jobject fdObj, ssObj;
int fd;
int type = (stream ? SOCK_STREAM : SOCK_DGRAM);
#ifdef AF_INET6
int domain = ipv6_available() ? AF_INET6 : AF_INET;
#else
int domain = AF_INET;
#endif
if (socketExceptionCls == NULL) {
jclass c = (*env)->FindClass(env, "java/net/SocketException");
CHECK_NULL(c);
socketExceptionCls = (jclass)(*env)->NewGlobalRef(env, c);
CHECK_NULL(socketExceptionCls);
}
fdObj = (*env)->GetObjectField(env, this, psi_fdID);
if (fdObj == NULL) {
(*env)->ThrowNew(env, socketExceptionCls, "null fd object");
return;
}
if ((fd = JVM_Socket(domain, type, 0)) == JVM_IO_ERR) {
/* note: if you run out of fds, you may not be able to load
* the exception class, and get a NoClassDefFoundError
* instead.
*/
NET_ThrowNew(env, errno, "can't create socket");
return;
}
#ifdef AF_INET6
/* Disable IPV6_V6ONLY to ensure dual-socket support */
if (domain == AF_INET6) {
int arg = 0;
if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (char*)&arg,
sizeof(int)) < 0) {
NET_ThrowNew(env, errno, "cannot set IPPROTO_IPV6");
close(fd);
return;
}
}
#endif /* AF_INET6 */
/*
* If this is a server socket then enable SO_REUSEADDR
* automatically and set to non blocking.
*/
ssObj = (*env)->GetObjectField(env, this, psi_serverSocketID);
if (ssObj != NULL) {
int arg = 1;
SET_NONBLOCKING(fd);
if (JVM_SetSockOpt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&arg,
sizeof(arg)) < 0) {
NET_ThrowNew(env, errno, "cannot set SO_REUSEADDR");
close(fd);
return;
}
}
(*env)->SetIntField(env, fdObj, IO_fd_fdID, fd);
}
/*
* inetAddress is the address object passed to the socket connect
* call.
*
* Class: java_net_PlainSocketImpl
* Method: socketConnect
* Signature: (Ljava/net/InetAddress;I)V
*/
JNIEXPORT void JNICALL
Java_java_net_PlainSocketImpl_socketConnect(JNIEnv *env, jobject this,
jobject iaObj, jint port,
jint timeout)
{
jint localport = (*env)->GetIntField(env, this, psi_localportID);
int len = 0;
/* fdObj is the FileDescriptor field on this */
jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
jclass clazz = (*env)->GetObjectClass(env, this);
jobject fdLock;
jint trafficClass = (*env)->GetIntField(env, this, psi_trafficClassID);
/* fd is an int field on iaObj */
jint fd;
SOCKADDR him;
/* The result of the connection */
int connect_rv = -1;
if (IS_NULL(fdObj)) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
return;
} else {
fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
}
if (IS_NULL(iaObj)) {
JNU_ThrowNullPointerException(env, "inet address argument null.");
return;
}
/* connect */
if (NET_InetAddressToSockaddr(env, iaObj, port, (struct sockaddr *)&him, &len, JNI_TRUE) != 0) {
return;
}
setDefaultScopeID(env, (struct sockaddr *)&him);
#ifdef AF_INET6
if (trafficClass != 0 && ipv6_available()) {
NET_SetTrafficClass((struct sockaddr *)&him, trafficClass);
}
#endif /* AF_INET6 */
if (timeout <= 0) {
connect_rv = NET_Connect(fd, (struct sockaddr *)&him, len);
#ifdef __solaris__
if (connect_rv == JVM_IO_ERR && errno == EINPROGRESS ) {
/* This can happen if a blocking connect is interrupted by a signal.
* See 6343810.
*/
while (1) {
#ifndef USE_SELECT
{
struct pollfd pfd;
pfd.fd = fd;
pfd.events = POLLOUT;
connect_rv = NET_Poll(&pfd, 1, -1);
}
#else
{
fd_set wr, ex;
FD_ZERO(&wr);
FD_SET(fd, &wr);
FD_ZERO(&ex);
FD_SET(fd, &ex);
connect_rv = NET_Select(fd+1, 0, &wr, &ex, 0);
}
#endif
if (connect_rv == JVM_IO_ERR) {
if (errno == EINTR) {
continue;
} else {
break;
}
}
if (connect_rv > 0) {
int optlen;
/* has connection been established */
optlen = sizeof(connect_rv);
if (JVM_GetSockOpt(fd, SOL_SOCKET, SO_ERROR,
(void*)&connect_rv, &optlen) <0) {
connect_rv = errno;
}
if (connect_rv != 0) {
/* restore errno */
errno = connect_rv;
connect_rv = JVM_IO_ERR;
}
break;
}
}
}
#endif
} else {
/*
* A timeout was specified. We put the socket into non-blocking
* mode, connect, and then wait for the connection to be
* established, fail, or timeout.
*/
SET_NONBLOCKING(fd);
/* no need to use NET_Connect as non-blocking */
connect_rv = connect(fd, (struct sockaddr *)&him, len);
/* connection not established immediately */
if (connect_rv != 0) {
int optlen;
jlong prevTime = JVM_CurrentTimeMillis(env, 0);
if (errno != EINPROGRESS) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
"connect failed");
SET_BLOCKING(fd);
return;
}
/*
* Wait for the connection to be established or a
* timeout occurs. poll/select needs to handle EINTR in
* case lwp sig handler redirects any process signals to
* this thread.
*/
while (1) {
jlong newTime;
#ifndef USE_SELECT
{
struct pollfd pfd;
pfd.fd = fd;
pfd.events = POLLOUT;
errno = 0;
connect_rv = NET_Poll(&pfd, 1, timeout);
}
#else
{
fd_set wr, ex;
struct timeval t;
t.tv_sec = timeout / 1000;
t.tv_usec = (timeout % 1000) * 1000;
FD_ZERO(&wr);
FD_SET(fd, &wr);
FD_ZERO(&ex);
FD_SET(fd, &ex);
errno = 0;
connect_rv = NET_Select(fd+1, 0, &wr, &ex, &t);
}
#endif
if (connect_rv >= 0) {
break;
}
if (errno != EINTR) {
break;
}
/*
* The poll was interrupted so adjust timeout and
* restart
*/
newTime = JVM_CurrentTimeMillis(env, 0);
timeout -= (newTime - prevTime);
if (timeout <= 0) {
connect_rv = 0;
break;
}
prevTime = newTime;
} /* while */
if (connect_rv == 0) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
"connect timed out");
/*
* Timeout out but connection may still be established.
* At the high level it should be closed immediately but
* just in case we make the socket blocking again and
* shutdown input & output.
*/
SET_BLOCKING(fd);
JVM_SocketShutdown(fd, 2);
return;
}
/* has connection been established */
optlen = sizeof(connect_rv);
if (JVM_GetSockOpt(fd, SOL_SOCKET, SO_ERROR, (void*)&connect_rv,
&optlen) <0) {
connect_rv = errno;
}
}
/* make socket blocking again */
SET_BLOCKING(fd);
/* restore errno */
if (connect_rv != 0) {
errno = connect_rv;
connect_rv = JVM_IO_ERR;
}
}
/* report the appropriate exception */
if (connect_rv < 0) {
#ifdef __linux__
/*
* Linux/GNU distribution setup /etc/hosts so that
* InetAddress.getLocalHost gets back the loopback address
* rather than the host address. Thus a socket can be
* bound to the loopback address and the connect will
* fail with EADDRNOTAVAIL. In addition the Linux kernel
* returns the wrong error in this case - it returns EINVAL
* instead of EADDRNOTAVAIL. We handle this here so that
* a more descriptive exception text is used.
*/
if (connect_rv == JVM_IO_ERR && errno == EINVAL) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"Invalid argument or cannot assign requested address");
return;
}
#endif
if (connect_rv == JVM_IO_INTR) {
JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException",
"operation interrupted");
#if defined(EPROTO)
} else if (errno == EPROTO) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ProtocolException",
"Protocol error");
#endif
} else if (errno == ECONNREFUSED) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
"Connection refused");
} else if (errno == ETIMEDOUT) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "ConnectException",
"Connection timed out");
} else if (errno == EHOSTUNREACH) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "NoRouteToHostException",
"Host unreachable");
} else if (errno == EADDRNOTAVAIL) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "NoRouteToHostException",
"Address not available");
} else if ((errno == EISCONN) || (errno == EBADF)) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"Socket closed");
} else {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "connect failed");
}
return;
}
(*env)->SetIntField(env, fdObj, IO_fd_fdID, fd);
/* set the remote peer address and port */
(*env)->SetObjectField(env, this, psi_addressID, iaObj);
(*env)->SetIntField(env, this, psi_portID, port);
/*
* we need to initialize the local port field if bind was called
* previously to the connect (by the client) then localport field
* will already be initialized
*/
if (localport == 0) {
/* Now that we're a connected socket, let's extract the port number
* that the system chose for us and store it in the Socket object.
*/
len = SOCKADDR_LEN;
if (JVM_GetSockName(fd, (struct sockaddr *)&him, &len) == -1) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
"Error getting socket name");
} else {
localport = NET_GetPortFromSockaddr((struct sockaddr *)&him);
(*env)->SetIntField(env, this, psi_localportID, localport);
}
}
}
/*
* Class: java_net_PlainSocketImpl
* Method: socketBind
* Signature: (Ljava/net/InetAddress;I)V
*/
JNIEXPORT void JNICALL
Java_java_net_PlainSocketImpl_socketBind(JNIEnv *env, jobject this,
jobject iaObj, jint localport) {
/* fdObj is the FileDescriptor field on this */
jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
/* fd is an int field on fdObj */
int fd;
int len;
SOCKADDR him;
if (IS_NULL(fdObj)) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"Socket closed");
return;
} else {
fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
}
if (IS_NULL(iaObj)) {
JNU_ThrowNullPointerException(env, "iaObj is null.");
return;
}
/* bind */
if (NET_InetAddressToSockaddr(env, iaObj, localport, (struct sockaddr *)&him, &len, JNI_TRUE) != 0) {
return;
}
setDefaultScopeID(env, (struct sockaddr *)&him);
if (NET_Bind(fd, (struct sockaddr *)&him, len) < 0) {
if (errno == EADDRINUSE || errno == EADDRNOTAVAIL ||
errno == EPERM || errno == EACCES) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "BindException",
"Bind failed");
} else {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
"Bind failed");
}
return;
}
/* set the address */
(*env)->SetObjectField(env, this, psi_addressID, iaObj);
/* initialize the local port */
if (localport == 0) {
/* Now that we're a connected socket, let's extract the port number
* that the system chose for us and store it in the Socket object.
*/
if (JVM_GetSockName(fd, (struct sockaddr *)&him, &len) == -1) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
"Error getting socket name");
return;
}
localport = NET_GetPortFromSockaddr((struct sockaddr *)&him);
(*env)->SetIntField(env, this, psi_localportID, localport);
} else {
(*env)->SetIntField(env, this, psi_localportID, localport);
}
}
/*
* Class: java_net_PlainSocketImpl
* Method: socketListen
* Signature: (I)V
*/
JNIEXPORT void JNICALL
Java_java_net_PlainSocketImpl_socketListen (JNIEnv *env, jobject this,
jint count)
{
/* this FileDescriptor fd field */
jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
/* fdObj's int fd field */
int fd;
if (IS_NULL(fdObj)) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"Socket closed");
return;
} else {
fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
}
/*
* Workaround for bugid 4101691 in Solaris 2.6. See 4106600.
* If listen backlog is Integer.MAX_VALUE then subtract 1.
*/
if (count == 0x7fffffff)
count -= 1;
if (JVM_Listen(fd, count) == JVM_IO_ERR) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
"Listen failed");
}
}
/*
* Class: java_net_PlainSocketImpl
* Method: socketAccept
* Signature: (Ljava/net/SocketImpl;)V
*/
JNIEXPORT void JNICALL
Java_java_net_PlainSocketImpl_socketAccept(JNIEnv *env, jobject this,
jobject socket)
{
/* fields on this */
int port;
jint timeout = (*env)->GetIntField(env, this, psi_timeoutID);
jlong prevTime = 0;
jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
/* the FileDescriptor field on socket */
jobject socketFdObj;
/* the InetAddress field on socket */
jobject socketAddressObj;
/* the ServerSocket fd int field on fdObj */
jint fd;
/* accepted fd */
jint newfd;
SOCKADDR him;
int len;
len = SOCKADDR_LEN;
if (IS_NULL(fdObj)) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"Socket closed");
return;
} else {
fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
}
if (IS_NULL(socket)) {
JNU_ThrowNullPointerException(env, "socket is null");
return;
}
/*
* accept connection but ignore ECONNABORTED indicating that
* connection was eagerly accepted by the OS but was reset
* before accept() was called.
*
* If accept timeout in place and timeout is adjusted with
* each ECONNABORTED or EWOULDBLOCK to ensure that semantics
* of timeout are preserved.
*/
for (;;) {
int ret;
/* first usage pick up current time */
if (prevTime == 0 && timeout > 0) {
prevTime = JVM_CurrentTimeMillis(env, 0);
}
/* passing a timeout of 0 to poll will return immediately,
but in the case of ServerSocket 0 means infinite. */
if (timeout <= 0) {
ret = NET_Timeout(fd, -1);
} else {
ret = NET_Timeout(fd, timeout);
}
if (ret == 0) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
"Accept timed out");
return;
} else if (ret == JVM_IO_ERR) {
if (errno == EBADF) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
} else {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "Accept failed");
}
return;
} else if (ret == JVM_IO_INTR) {
JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException",
"operation interrupted");
return;
}
newfd = NET_Accept(fd, (struct sockaddr *)&him, (jint*)&len);
/* connection accepted */
if (newfd >= 0) {
SET_BLOCKING(newfd);
break;
}
/* non (ECONNABORTED or EWOULDBLOCK) error */
if (!(errno == ECONNABORTED || errno == EWOULDBLOCK)) {
break;
}
/* ECONNABORTED or EWOULDBLOCK error so adjust timeout if there is one. */
if (timeout) {
jlong currTime = JVM_CurrentTimeMillis(env, 0);
timeout -= (currTime - prevTime);
if (timeout <= 0) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketTimeoutException",
"Accept timed out");
return;
}
prevTime = currTime;
}
}
if (newfd < 0) {
if (newfd == -2) {
JNU_ThrowByName(env, JNU_JAVAIOPKG "InterruptedIOException",
"operation interrupted");
} else {
if (errno == EINVAL) {
errno = EBADF;
}
if (errno == EBADF) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Socket closed");
} else {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException", "Accept failed");
}
}
return;
}
/*
* fill up the remote peer port and address in the new socket structure.
*/
socketAddressObj = NET_SockaddrToInetAddress(env, (struct sockaddr *)&him, &port);
if (socketAddressObj == NULL) {
/* should be pending exception */
close(newfd);
return;
}
/*
* Populate SocketImpl.fd.fd
*/
socketFdObj = (*env)->GetObjectField(env, socket, psi_fdID);
(*env)->SetIntField(env, socketFdObj, IO_fd_fdID, newfd);
(*env)->SetObjectField(env, socket, psi_addressID, socketAddressObj);
(*env)->SetIntField(env, socket, psi_portID, port);
/* also fill up the local port information */
port = (*env)->GetIntField(env, this, psi_localportID);
(*env)->SetIntField(env, socket, psi_localportID, port);
}
/*
* Class: java_net_PlainSocketImpl
* Method: socketAvailable
* Signature: ()I
*/
JNIEXPORT jint JNICALL
Java_java_net_PlainSocketImpl_socketAvailable(JNIEnv *env, jobject this) {
jint ret = -1;
jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
jint fd;
if (IS_NULL(fdObj)) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"Socket closed");
return -1;
} else {
fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
}
/* JVM_SocketAvailable returns 0 for failure, 1 for success */
if (!JVM_SocketAvailable(fd, &ret)){
if (errno == ECONNRESET) {
JNU_ThrowByName(env, "sun/net/ConnectionResetException", "");
} else {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
"ioctl FIONREAD failed");
}
}
return ret;
}
/*
* Class: java_net_PlainSocketImpl
* Method: socketClose0
* Signature: (Z)V
*/
JNIEXPORT void JNICALL
Java_java_net_PlainSocketImpl_socketClose0(JNIEnv *env, jobject this,
jboolean useDeferredClose) {
jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
jint fd;
if (IS_NULL(fdObj)) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"socket already closed");
return;
} else {
fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
}
if (fd != -1) {
if (useDeferredClose && marker_fd >= 0) {
NET_Dup2(marker_fd, fd);
} else {
(*env)->SetIntField(env, fdObj, IO_fd_fdID, -1);
NET_SocketClose(fd);
}
}
}
/*
* Class: java_net_PlainSocketImpl
* Method: socketShutdown
* Signature: (I)V
*/
JNIEXPORT void JNICALL
Java_java_net_PlainSocketImpl_socketShutdown(JNIEnv *env, jobject this,
jint howto)
{
jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
jint fd;
/*
* WARNING: THIS NEEDS LOCKING. ALSO: SHOULD WE CHECK for fd being
* -1 already?
*/
if (IS_NULL(fdObj)) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"socket already closed");
return;
} else {
fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
}
JVM_SocketShutdown(fd, howto);
}
/*
* Class: java_net_PlainSocketImpl
* Method: socketSetOption
* Signature: (IZLjava/lang/Object;)V
*/
JNIEXPORT void JNICALL
Java_java_net_PlainSocketImpl_socketSetOption(JNIEnv *env, jobject this,
jint cmd, jboolean on,
jobject value) {
int fd;
int level, optname, optlen;
union {
int i;
struct linger ling;
} optval;
/*
* Check that socket hasn't been closed
*/
fd = getFD(env, this);
if (fd < 0) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"Socket closed");
return;
}
/*
* SO_TIMEOUT is a NOOP on Solaris/Linux
*/
if (cmd == java_net_SocketOptions_SO_TIMEOUT) {
return;
}
/*
* Map the Java level socket option to the platform specific
* level and option name.
*/
if (NET_MapSocketOption(cmd, &level, &optname)) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Invalid option");
return;
}
switch (cmd) {
case java_net_SocketOptions_SO_SNDBUF :
case java_net_SocketOptions_SO_RCVBUF :
case java_net_SocketOptions_SO_LINGER :
case java_net_SocketOptions_IP_TOS :
{
jclass cls;
jfieldID fid;
cls = (*env)->FindClass(env, "java/lang/Integer");
CHECK_NULL(cls);
fid = (*env)->GetFieldID(env, cls, "value", "I");
CHECK_NULL(fid);
if (cmd == java_net_SocketOptions_SO_LINGER) {
if (on) {
optval.ling.l_onoff = 1;
optval.ling.l_linger = (*env)->GetIntField(env, value, fid);
} else {
optval.ling.l_onoff = 0;
optval.ling.l_linger = 0;
}
optlen = sizeof(optval.ling);
} else {
optval.i = (*env)->GetIntField(env, value, fid);
optlen = sizeof(optval.i);
}
break;
}
/* Boolean -> int */
default :
optval.i = (on ? 1 : 0);
optlen = sizeof(optval.i);
}
if (NET_SetSockOpt(fd, level, optname, (const void *)&optval, optlen) < 0) {
#ifdef __solaris__
if (errno == EINVAL) {
// On Solaris setsockopt will set errno to EINVAL if the socket
// is closed. The default error message is then confusing
char fullMsg[128];
jio_snprintf(fullMsg, sizeof(fullMsg), "Invalid option or socket reset by remote peer");
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", fullMsg);
return;
}
#endif /* __solaris__ */
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
"Error setting socket option");
}
}
/*
* Class: java_net_PlainSocketImpl
* Method: socketGetOption
* Signature: (I)I
*/
JNIEXPORT jint JNICALL
Java_java_net_PlainSocketImpl_socketGetOption(JNIEnv *env, jobject this,
jint cmd, jobject iaContainerObj) {
int fd;
int level, optname, optlen;
union {
int i;
struct linger ling;
} optval;
/*
* Check that socket hasn't been closed
*/
fd = getFD(env, this);
if (fd < 0) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
"Socket closed");
return -1;
}
/*
* SO_BINDADDR isn't a socket option
*/
if (cmd == java_net_SocketOptions_SO_BINDADDR) {
SOCKADDR him;
socklen_t len = 0;
int port;
jobject iaObj;
jclass iaCntrClass;
jfieldID iaFieldID;
len = SOCKADDR_LEN;
if (getsockname(fd, (struct sockaddr *)&him, &len) < 0) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
"Error getting socket name");
return -1;
}
iaObj = NET_SockaddrToInetAddress(env, (struct sockaddr *)&him, &port);
CHECK_NULL_RETURN(iaObj, -1);
iaCntrClass = (*env)->GetObjectClass(env, iaContainerObj);
iaFieldID = (*env)->GetFieldID(env, iaCntrClass, "addr", "Ljava/net/InetAddress;");
CHECK_NULL_RETURN(iaFieldID, -1);
(*env)->SetObjectField(env, iaContainerObj, iaFieldID, iaObj);
return 0; /* notice change from before */
}
/*
* Map the Java level socket option to the platform specific
* level and option name.
*/
if (NET_MapSocketOption(cmd, &level, &optname)) {
JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException", "Invalid option");
return -1;
}
/*
* Args are int except for SO_LINGER
*/
if (cmd == java_net_SocketOptions_SO_LINGER) {
optlen = sizeof(optval.ling);
} else {
optlen = sizeof(optval.i);
}
if (NET_GetSockOpt(fd, level, optname, (void *)&optval, &optlen) < 0) {
NET_ThrowByNameWithLastError(env, JNU_JAVANETPKG "SocketException",
"Error getting socket option");
return -1;
}
switch (cmd) {
case java_net_SocketOptions_SO_LINGER:
return (optval.ling.l_onoff ? optval.ling.l_linger: -1);
case java_net_SocketOptions_SO_SNDBUF:
case java_net_SocketOptions_SO_RCVBUF:
case java_net_SocketOptions_IP_TOS:
return optval.i;
default :
return (optval.i == 0) ? -1 : 1;
}
}
/*
* Class: java_net_PlainSocketImpl
* Method: socketSendUrgentData
* Signature: (B)V
*/
JNIEXPORT void JNICALL
Java_java_net_PlainSocketImpl_socketSendUrgentData(JNIEnv *env, jobject this,
jint data) {
/* The fd field */
jobject fdObj = (*env)->GetObjectField(env, this, psi_fdID);
int n, fd;
unsigned char d = data & 0xFF;
if (IS_NULL(fdObj)) {
JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
return;
} else {
fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
/* Bug 4086704 - If the Socket associated with this file descriptor
* was closed (sysCloseFD), the the file descriptor is set to -1.
*/
if (fd == -1) {
JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
return;
}
}
n = JVM_Send(fd, (char *)&d, 1, MSG_OOB);
if (n == JVM_IO_ERR) {
NET_ThrowByNameWithLastError(env, "java/io/IOException", "Write failed");
return;
}
if (n == JVM_IO_INTR) {
JNU_ThrowByName(env, "java/io/InterruptedIOException", 0);
return;
}
}
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