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|
/****************************************************************************
**
** Implementation of TQSocketDevice class.
**
** Created : 970521
**
** Copyright (C) 2010 Timothy Pearson and (C) 1992-2008 Trolltech ASA.
**
** This file is part of the network module of the TQt GUI Toolkit.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** This file may be used under the terms of the Q Public License as
** defined by Trolltech ASA and appearing in the file LICENSE.TQPL
** included in the packaging of this file. Licensees holding valid TQt
** Commercial licenses may use this file in accordance with the TQt
** Commercial License Agreement provided with the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#include "tqplatformdefs.h"
// Almost always the same. If not, specify in qplatformdefs.h.
#if !defined(TQT_SOCKOPTLEN_T)
# define TQT_SOCKOPTLEN_T TQT_SOCKLEN_T
#endif
// Tru64 redefines accept -> _accept with _XOPEN_SOURCE_EXTENDED
static inline int qt_socket_accept(int s, struct sockaddr *addr, TQT_SOCKLEN_T *addrlen)
{ return ::accept(s, addr, addrlen); }
#if defined(accept)
# undef accept
#endif
// Solaris redefines bind -> __xnet_bind with _XOPEN_SOURCE_EXTENDED
static inline int qt_socket_bind(int s, struct sockaddr *addr, TQT_SOCKLEN_T addrlen)
{ return ::bind(s, addr, addrlen); }
#if defined(bind)
# undef bind
#endif
// Solaris redefines connect -> __xnet_connect with _XOPEN_SOURCE_EXTENDED
static inline int qt_socket_connect(int s, struct sockaddr *addr, TQT_SOCKLEN_T addrlen)
{ return ::connect(s, addr, addrlen); }
#if defined(connect)
# undef connect
#endif
// UnixWare 7 redefines listen -> _listen
static inline int qt_socket_listen(int s, int backlog)
{ return ::listen(s, backlog); }
#if defined(listen)
# undef listen
#endif
// UnixWare 7 redefines socket -> _socket
static inline int qt_socket_socket(int domain, int type, int protocol)
{ return ::socket(domain, type, protocol); }
#if defined(socket)
# undef socket
#endif
#include "tqsocketdevice.h"
#ifndef TQT_NO_NETWORK
#include "tqwindowdefs.h"
#include <errno.h>
#include <sys/types.h>
static inline void qt_socket_getportaddr( struct sockaddr *sa,
TQ_UINT16 *port, TQHostAddress *addr )
{
#if !defined(TQT_NO_IPV6)
if ( sa->sa_family == AF_INET6 ) {
struct sockaddr_in6 *sa6 = ( struct sockaddr_in6 * )sa;
TQ_IPV6ADDR tmp;
memcpy( &tmp, &sa6->sin6_addr.s6_addr, sizeof(tmp) );
TQHostAddress a( tmp );
*addr = a;
*port = ntohs( sa6->sin6_port );
return;
}
#endif
struct sockaddr_in *sa4 = (struct sockaddr_in *)sa;
TQHostAddress a( ntohl( sa4->sin_addr.s_addr ) );
*port = ntohs( sa4->sin_port );
*addr = TQHostAddress( ntohl( sa4->sin_addr.s_addr ) );
return;
}
#ifdef USE_QT4
qint64 TQSocketDevice::readData( char *data, qint64 maxlen )
{
#if defined(QT_CHECK_NULL)
if ( data == 0 && maxlen != 0 ) {
qWarning( "TQSocketDevice::readBlock: Null pointer error" );
}
#endif
#if defined(QT_CHECK_STATE)
if ( !isValid() ) {
qWarning( "TQSocketDevice::readBlock: Invalid socket" );
return -1;
}
if ( !isOpen() ) {
qWarning( "TQSocketDevice::readBlock: Device is not open" );
return -1;
}
if ( !isReadable() ) {
qWarning( "TQSocketDevice::readBlock: Read operation not permitted" );
return -1;
}
#endif
bool done = false;
int r = 0;
while ( done == false ) {
if ( t == Datagram ) {
#if !defined(QT_NO_IPV6)
struct sockaddr_storage aa;
#else
struct sockaddr_in aa;
#endif
memset( &aa, 0, sizeof(aa) );
QT_SOCKLEN_T sz;
sz = sizeof( aa );
r = ::recvfrom( fd, data, maxlen, 0,
(struct sockaddr *)&aa, &sz );
qt_socket_getportaddr( (struct sockaddr *)&aa, &pp, &pa);
} else {
r = ::read( fd, data, maxlen );
}
done = true;
if ( r == 0 && t == Stream && maxlen > 0 ) {
// connection closed
close();
} else if ( r >= 0 || errno == EAGAIN || errno == EWOULDBLOCK ) {
// nothing
} else if ( errno == EINTR ) {
done = false;
} else if ( e == NoError ) {
switch( errno ) {
case EIO:
case EISDIR:
case EBADF:
case EINVAL:
case EFAULT:
case ENOTCONN:
case ENOTSOCK:
e = Impossible;
break;
#if defined(ENONET)
case ENONET:
#endif
case EHOSTUNREACH:
case ENETDOWN:
case ENETUNREACH:
case ETIMEDOUT:
e = NetworkFailure;
break;
case EPIPE:
case ECONNRESET:
// connection closed
close();
r = 0;
break;
default:
e = UnknownError;
break;
}
}
}
return r;
}
qint64 TQSocketDevice::writeData( const char *data, qint64 len )
{
if ( data == 0 && len != 0 ) {
#if defined(QT_CHECK_NULL) || defined(QSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::writeBlock: Null pointer error" );
#endif
return -1;
}
if ( !isValid() ) {
#if defined(QT_CHECK_STATE) || defined(QSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::writeBlock: Invalid socket" );
#endif
return -1;
}
if ( !isOpen() ) {
#if defined(QT_CHECK_STATE) || defined(QSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::writeBlock: Device is not open" );
#endif
return -1;
}
if ( !isWritable() ) {
#if defined(QT_CHECK_STATE) || defined(QSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::writeBlock: Write operation not permitted" );
#endif
return -1;
}
bool done = false;
int r = 0;
bool timeout;
while ( !done ) {
r = ::write( fd, data, len );
done = true;
if ( r < 0 && e == NoError &&
errno != EAGAIN && errno != EWOULDBLOCK ) {
switch( errno ) {
case EINTR: // signal - call read() or whatever again
done = false;
break;
case EPIPE:
case ECONNRESET:
// connection closed
close();
r = 0;
break;
case ENOSPC:
case EIO:
case EISDIR:
case EBADF:
case EINVAL:
case EFAULT:
case ENOTCONN:
case ENOTSOCK:
e = Impossible;
break;
#if defined(ENONET)
case ENONET:
#endif
case EHOSTUNREACH:
case ENETDOWN:
case ENETUNREACH:
case ETIMEDOUT:
e = NetworkFailure;
break;
default:
e = UnknownError;
break;
}
} else if ( waitForMore( 0, &timeout ) == 0 ) {
if ( !timeout ) {
// connection closed
close();
}
}
}
return r;
}
#endif // USE_QT4
//#define TQSOCKETDEVICE_DEBUG
// internal
void TQSocketDevice::init()
{
}
TQSocketDevice::Protocol TQSocketDevice::getProtocol() const
{
if ( isValid() ) {
#if !defined (TQT_NO_IPV6)
struct sockaddr_storage sa;
#else
struct sockaddr sa;
#endif
memset( &sa, 0, sizeof(sa) );
TQT_SOCKLEN_T sz = sizeof( sa );
#if !defined (TQT_NO_IPV6)
struct sockaddr *sap = reinterpret_cast<struct sockaddr *>(&sa);
if ( !::getsockname(fd, sap, &sz) ) {
switch ( sap->sa_family ) {
case AF_INET:
return IPv4;
case AF_INET6:
return IPv6;
default:
return Unknown;
}
}
#else
if ( !::getsockname(fd, &sa, &sz) ) {
switch ( sa.sa_family ) {
case AF_INET:
return IPv4;
default:
return Unknown;
}
}
#endif
}
return Unknown;
}
/*!
Creates a new socket identifier. Returns -1 if there is a failure
to create the new identifier; error() explains why.
\sa setSocket()
*/
int TQSocketDevice::createNewSocket()
{
#if !defined(TQT_NO_IPV6)
int s = qt_socket_socket( protocol() == IPv6 ? AF_INET6 : AF_INET,
t == Datagram ? SOCK_DGRAM : SOCK_STREAM, 0 );
#else
int s = qt_socket_socket( AF_INET, t==Datagram?SOCK_DGRAM:SOCK_STREAM, 0 );
#endif
if ( s < 0 ) {
switch( errno ) {
case EPROTONOSUPPORT:
e = InternalError; // 0 is supposed to work for both types
break;
case ENFILE:
e = NoFiles; // special case for this
break;
case EACCES:
e = Inaccessible;
break;
case ENOBUFS:
case ENOMEM:
e = NoResources;
break;
case EINVAL:
e = Impossible;
break;
default:
e = UnknownError;
break;
}
} else {
// ensure that the socket is closed on exec..() after being dup()'ed by
// fork() in TQProcess.
::fcntl(s, F_SETFD, FD_CLOEXEC);
return s;
}
return -1;
}
/*!
\reimp
Closes the socket and sets the socket identifier to -1 (invalid).
(This function ignores errors; if there are any then a file
descriptor leakage might result. As far as we know, the only error
that can arise is EBADF, and that would of course not cause
leakage. There may be OS-specfic errors that we haven't come
across, however.)
\sa open()
*/
void TQSocketDevice::close()
{
if ( fd == -1 || !isOpen() ) // already closed
return;
setFlags( IO_Sequential );
resetqStatus();
setState( 0 );
::close( fd );
#if defined(TQSOCKETDEVICE_DEBUG)
qDebug( "TQSocketDevice::close: Closed socket %x", fd );
#endif
fd = -1;
fetchConnectionParameters();
}
/*!
Returns TRUE if the socket is valid and in blocking mode;
otherwise returns FALSE.
Note that this function does not set error().
\warning On Windows, this function always returns TRUE since the
ioctlsocket() function is broken.
\sa setBlocking(), isValid()
*/
bool TQSocketDevice::blocking() const
{
if ( !isValid() )
return TRUE;
int s = fcntl(fd, F_GETFL, 0);
return !(s >= 0 && ((s & O_NDELAY) != 0));
}
/*!
Makes the socket blocking if \a enable is TRUE or nonblocking if
\a enable is FALSE.
Sockets are blocking by default, but we recommend using
nonblocking socket operations, especially for GUI programs that
need to be responsive.
\warning On Windows, this function should be used with care since
whenever you use a TQSocketNotifier on Windows, the socket is
immediately made nonblocking.
\sa blocking(), isValid()
*/
void TQSocketDevice::setBlocking( bool enable )
{
#if defined(TQSOCKETDEVICE_DEBUG)
qDebug( "TQSocketDevice::setBlocking( %d )", enable );
#endif
if ( !isValid() )
return;
int tmp = ::fcntl(fd, F_GETFL, 0);
if ( tmp >= 0 )
tmp = ::fcntl( fd, F_SETFL, enable ? (tmp&~O_NDELAY) : (tmp|O_NDELAY) );
if ( tmp >= 0 )
return;
if ( e )
return;
switch( errno ) {
case EACCES:
case EBADF:
e = Impossible;
break;
case EFAULT:
case EAGAIN:
#if EAGAIN != EWOULDBLOCK
case EWOULDBLOCK:
#endif
case EDEADLK:
case EINTR:
case EINVAL:
case EMFILE:
case ENOLCK:
case EPERM:
default:
e = UnknownError;
}
}
/*!
Returns the value of the socket option \a opt.
*/
int TQSocketDevice::option( Option opt ) const
{
if ( !isValid() )
return -1;
int n = -1;
int v = -1;
switch ( opt ) {
case Broadcast:
n = SO_BROADCAST;
break;
case ReceiveBuffer:
n = SO_RCVBUF;
break;
case ReuseAddress:
n = SO_REUSEADDR;
break;
case SendBuffer:
n = SO_SNDBUF;
break;
}
if ( n != -1 ) {
TQT_SOCKOPTLEN_T len;
len = sizeof(v);
int r = ::getsockopt( fd, SOL_SOCKET, n, (char*)&v, &len );
if ( r >= 0 )
return v;
if ( !e ) {
TQSocketDevice *that = (TQSocketDevice*)this; // mutable function
switch( errno ) {
case EBADF:
case ENOTSOCK:
that->e = Impossible;
break;
case EFAULT:
that->e = InternalError;
break;
default:
that->e = UnknownError;
break;
}
}
return -1;
}
return v;
}
/*!
Sets the socket option \a opt to \a v.
*/
void TQSocketDevice::setOption( Option opt, int v )
{
if ( !isValid() )
return;
int n = -1; // for really, really bad compilers
switch ( opt ) {
case Broadcast:
n = SO_BROADCAST;
break;
case ReceiveBuffer:
n = SO_RCVBUF;
break;
case ReuseAddress:
n = SO_REUSEADDR;
break;
case SendBuffer:
n = SO_SNDBUF;
break;
default:
return;
}
if ( ::setsockopt( fd, SOL_SOCKET, n, (char*)&v, sizeof(v)) < 0 &&
e == NoError ) {
switch( errno ) {
case EBADF:
case ENOTSOCK:
e = Impossible;
break;
case EFAULT:
e = InternalError;
break;
default:
e = UnknownError;
break;
}
}
}
/*!
Connects to the IP address and port specified by \a addr and \a
port. Returns TRUE if it establishes a connection; otherwise returns FALSE.
If it returns FALSE, error() explains why.
Note that error() commonly returns NoError for non-blocking
sockets; this just means that you can call connect() again in a
little while and it'll probably succeed.
*/
bool TQSocketDevice::connect( const TQHostAddress &addr, TQ_UINT16 port )
{
if ( !isValid() )
return FALSE;
pa = addr;
pp = port;
struct sockaddr_in a4;
struct sockaddr *aa;
TQT_SOCKLEN_T aalen;
#if !defined(TQT_NO_IPV6)
struct sockaddr_in6 a6;
if ( addr.isIPv6Address() ) {
memset( &a6, 0, sizeof(a6) );
a6.sin6_family = AF_INET6;
a6.sin6_port = htons( port );
TQ_IPV6ADDR ip6 = addr.toIPv6Address();
memcpy( &a6.sin6_addr.s6_addr, &ip6, sizeof(ip6) );
aalen = sizeof( a6 );
aa = (struct sockaddr *)&a6;
} else
#endif
if ( addr.isIPv4Address() ) {
memset( &a4, 0, sizeof(a4) );
a4.sin_family = AF_INET;
a4.sin_port = htons( port );
a4.sin_addr.s_addr = htonl( addr.toIPv4Address() );
aalen = sizeof(a4);
aa = (struct sockaddr *)&a4;
} else {
e = Impossible;
return FALSE;
}
int r = qt_socket_connect( fd, aa, aalen );
if ( r == 0 ) {
fetchConnectionParameters();
return TRUE;
}
if ( errno == EISCONN || errno == EALREADY || errno == EINPROGRESS ) {
fetchConnectionParameters();
return TRUE;
}
if ( e != NoError || errno == EAGAIN || errno == EWOULDBLOCK ) {
return FALSE;
}
switch( errno ) {
case EBADF:
case ENOTSOCK:
e = Impossible;
break;
case EFAULT:
case EAFNOSUPPORT:
e = InternalError;
break;
case ECONNREFUSED:
e = ConnectionRefused;
break;
case ETIMEDOUT:
case ENETUNREACH:
e = NetworkFailure;
break;
case EADDRINUSE:
e = NoResources;
break;
case EACCES:
case EPERM:
e = Inaccessible;
break;
default:
e = UnknownError;
break;
}
return FALSE;
}
/*!
Assigns a name to an unnamed socket. The name is the host address
\a address and the port number \a port. If the operation succeeds,
bind() returns TRUE; otherwise it returns FALSE without changing
what port() and address() return.
bind() is used by servers for setting up incoming connections.
Call bind() before listen().
*/
bool TQSocketDevice::bind( const TQHostAddress &address, TQ_UINT16 port )
{
if ( !isValid() )
return FALSE;
int r;
struct sockaddr_in a4;
#if !defined(TQT_NO_IPV6)
struct sockaddr_in6 a6;
if ( address.isIPv6Address() ) {
memset( &a6, 0, sizeof(a6) );
a6.sin6_family = AF_INET6;
a6.sin6_port = htons( port );
TQ_IPV6ADDR tmp = address.toIPv6Address();
memcpy( &a6.sin6_addr.s6_addr, &tmp, sizeof(tmp) );
r = qt_socket_bind( fd, (struct sockaddr *)&a6, sizeof(a6) );
} else
#endif
if ( address.isIPv4Address() ) {
memset( &a4, 0, sizeof(a4) );
a4.sin_family = AF_INET;
a4.sin_port = htons( port );
a4.sin_addr.s_addr = htonl( address.toIPv4Address() );
r = qt_socket_bind( fd, (struct sockaddr*)&a4, sizeof(a4) );
} else {
e = Impossible;
return FALSE;
}
if ( r < 0 ) {
switch( errno ) {
case EINVAL:
e = AlreadyBound;
break;
case EACCES:
e = Inaccessible;
break;
case ENOMEM:
e = NoResources;
break;
case EFAULT: // a was illegal
case ENAMETOOLONG: // sz was wrong
e = InternalError;
break;
case EBADF: // AF_UNIX only
case ENOTSOCK: // AF_UNIX only
case EROFS: // AF_UNIX only
case ENOENT: // AF_UNIX only
case ENOTDIR: // AF_UNIX only
case ELOOP: // AF_UNIX only
e = Impossible;
break;
default:
e = UnknownError;
break;
}
return FALSE;
}
fetchConnectionParameters();
return TRUE;
}
/*!
Specifies how many pending connections a server socket can have.
Returns TRUE if the operation was successful; otherwise returns
FALSE. A \a backlog value of 50 is quite common.
The listen() call only applies to sockets where type() is \c
Stream, i.e. not to \c Datagram sockets. listen() must not be
called before bind() or after accept().
\sa bind(), accept()
*/
bool TQSocketDevice::listen( int backlog )
{
if ( !isValid() )
return FALSE;
if ( qt_socket_listen( fd, backlog ) >= 0 )
return TRUE;
if ( !e )
e = Impossible;
return FALSE;
}
/*!
Extracts the first connection from the queue of pending
connections for this socket and returns a new socket identifier.
Returns -1 if the operation failed.
\sa bind(), listen()
*/
int TQSocketDevice::accept()
{
if ( !isValid() )
return -1;
#if !defined (TQT_NO_IPV6)
struct sockaddr_storage aa;
#else
struct sockaddr aa;
#endif
TQT_SOCKLEN_T l = sizeof( aa );
bool done;
int s;
do {
s = qt_socket_accept( fd, (struct sockaddr*)&aa, &l );
// we'll blithely throw away the stuff accept() wrote to aa
done = TRUE;
if ( s < 0 && e == NoError ) {
switch( errno ) {
case EINTR:
done = FALSE;
break;
#if defined(EPROTO)
case EPROTO:
#endif
#if defined(ENONET)
case ENONET:
#endif
case ENOPROTOOPT:
case EHOSTDOWN:
case EOPNOTSUPP:
case EHOSTUNREACH:
case ENETDOWN:
case ENETUNREACH:
case ETIMEDOUT:
// in all these cases, an error happened during connection
// setup. we're not interested in what happened, so we
// just treat it like the client-closed-quickly case.
case EPERM:
// firewalling wouldn't let us accept. we treat it like
// the client-closed-quickly case.
case EAGAIN:
#if EAGAIN != EWOULDBLOCK
case EWOULDBLOCK:
#endif
// the client closed the connection before we got around
// to accept()ing it.
break;
case EBADF:
case ENOTSOCK:
e = Impossible;
break;
case EFAULT:
e = InternalError;
break;
case ENOMEM:
case ENOBUFS:
e = NoResources;
break;
default:
e = UnknownError;
break;
}
}
} while (!done);
// ensure that the socket is closed on exec..() after being dup()'ed by
// fork() in TQProcess.
::fcntl(s, F_SETFD, FD_CLOEXEC);
return s;
}
/*!
Returns the number of bytes available for reading, or -1 if an
error occurred.
\warning On Microsoft Windows, we use the ioctlsocket() function
to determine the number of bytes queued on the socket. According
to Microsoft (KB Q125486), ioctlsocket() sometimes returns an
incorrect number. The only safe way to determine the amount of
data on the socket is to read it using readBlock(). TQSocket has
workarounds to deal with this problem.
*/
#ifdef USE_QT4
qint64 TQSocketDevice::bytesAvailable() const
#else // USE_QT4
TQ_LONG TQSocketDevice::bytesAvailable() const
#endif // USE_QT4
{
if ( !isValid() )
return -1;
/*
Apparently, there is not consistency among different operating
systems on how to use FIONREAD.
FreeBSD, Linux and Solaris all expect the 3rd argument to
ioctl() to be an int, which is normally 32-bit even on 64-bit
machines.
IRIX, on the other hand, expects a size_t, which is 64-bit on
64-bit machines.
So, the solution is to use size_t initialized to zero to make
sure all bits are set to zero, preventing underflow with the
FreeBSD/Linux/Solaris ioctls.
*/
size_t nbytes = 0;
// gives shorter than true amounts on Unix domain sockets.
if ( ::ioctl(fd, FIONREAD, (char*)&nbytes) < 0 )
return -1;
return (TQ_LONG) *((int *) &nbytes);
}
/*!
Wait up to \a msecs milliseconds for more data to be available. If
\a msecs is -1 the call will block indefinitely.
Returns the number of bytes available for reading, or -1 if an
error occurred.
If \a timeout is non-null and no error occurred (i.e. it does not
return -1): this function sets \a *timeout to TRUE, if the reason
for returning was that the timeout was reached; otherwise it sets
\a *timeout to FALSE. This is useful to tqfind out if the peer
closed the connection.
\warning This is a blocking call and should be avoided in event
driven applications.
\sa bytesAvailable()
*/
TQ_LONG TQSocketDevice::waitForMore( int msecs, bool *timeout ) const
{
if ( !isValid() )
return -1;
if ( fd >= FD_SETSIZE )
return -1;
fd_set fds;
struct timeval tv;
FD_ZERO( &fds );
FD_SET( fd, &fds );
tv.tv_sec = msecs / 1000;
tv.tv_usec = (msecs % 1000) * 1000;
int rv = select( fd+1, &fds, 0, 0, msecs < 0 ? 0 : &tv );
if ( rv < 0 )
return -1;
if ( timeout ) {
if ( rv == 0 )
*timeout = TRUE;
else
*timeout = FALSE;
}
return bytesAvailable();
}
/*!
Reads \a maxlen bytes from the socket into \a data and returns the
number of bytes read. Returns -1 if an error occurred. Returning 0
is not an error. For Stream sockets, 0 is returned when the remote
host closes the connection. For Datagram sockets, 0 is a valid
datagram size.
*/
TQ_LONG TQSocketDevice::readBlock( char *data, TQ_ULONG maxlen )
{
#if defined(TQT_CHECK_NULL)
if ( data == 0 && maxlen != 0 ) {
qWarning( "TQSocketDevice::readBlock: Null pointer error" );
}
#endif
#if defined(TQT_CHECK_STATE)
if ( !isValid() ) {
qWarning( "TQSocketDevice::readBlock: Invalid socket" );
return -1;
}
if ( !isOpen() ) {
qWarning( "TQSocketDevice::readBlock: Device is not open" );
return -1;
}
if ( !isReadable() ) {
qWarning( "TQSocketDevice::readBlock: Read operation not permitted" );
return -1;
}
#endif
bool done = FALSE;
int r = 0;
while ( done == FALSE ) {
if ( t == Datagram ) {
#if !defined(TQT_NO_IPV6)
struct sockaddr_storage aa;
#else
struct sockaddr_in aa;
#endif
memset( &aa, 0, sizeof(aa) );
TQT_SOCKLEN_T sz;
sz = sizeof( aa );
r = ::recvfrom( fd, data, maxlen, 0,
(struct sockaddr *)&aa, &sz );
qt_socket_getportaddr( (struct sockaddr *)&aa, &pp, &pa);
} else {
r = ::read( fd, data, maxlen );
}
done = TRUE;
if ( r == 0 && t == Stream && maxlen > 0 ) {
// connection closed
close();
} else if ( r >= 0 || errno == EAGAIN || errno == EWOULDBLOCK ) {
// nothing
} else if ( errno == EINTR ) {
done = FALSE;
} else if ( e == NoError ) {
switch( errno ) {
case EIO:
case EISDIR:
case EBADF:
case EINVAL:
case EFAULT:
case ENOTCONN:
case ENOTSOCK:
e = Impossible;
break;
#if defined(ENONET)
case ENONET:
#endif
case EHOSTUNREACH:
case ENETDOWN:
case ENETUNREACH:
case ETIMEDOUT:
e = NetworkFailure;
break;
case EPIPE:
case ECONNRESET:
// connection closed
close();
r = 0;
break;
default:
e = UnknownError;
break;
}
}
}
return r;
}
/*!
Writes \a len bytes to the socket from \a data and returns the
number of bytes written. Returns -1 if an error occurred.
This is used for \c TQSocketDevice::Stream sockets.
*/
TQ_LONG TQSocketDevice::writeBlock( const char *data, TQ_ULONG len )
{
if ( data == 0 && len != 0 ) {
#if defined(TQT_CHECK_NULL) || defined(TQSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::writeBlock: Null pointer error" );
#endif
return -1;
}
if ( !isValid() ) {
#if defined(TQT_CHECK_STATE) || defined(TQSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::writeBlock: Invalid socket" );
#endif
return -1;
}
if ( !isOpen() ) {
#if defined(TQT_CHECK_STATE) || defined(TQSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::writeBlock: Device is not open" );
#endif
return -1;
}
if ( !isWritable() ) {
#if defined(TQT_CHECK_STATE) || defined(TQSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::writeBlock: Write operation not permitted" );
#endif
return -1;
}
bool done = FALSE;
int r = 0;
bool timeout;
while ( !done ) {
r = ::write( fd, data, len );
done = TRUE;
if ( r < 0 && e == NoError &&
errno != EAGAIN && errno != EWOULDBLOCK ) {
switch( errno ) {
case EINTR: // signal - call read() or whatever again
done = FALSE;
break;
case EPIPE:
case ECONNRESET:
// connection closed
close();
r = 0;
break;
case ENOSPC:
case EIO:
case EISDIR:
case EBADF:
case EINVAL:
case EFAULT:
case ENOTCONN:
case ENOTSOCK:
e = Impossible;
break;
#if defined(ENONET)
case ENONET:
#endif
case EHOSTUNREACH:
case ENETDOWN:
case ENETUNREACH:
case ETIMEDOUT:
e = NetworkFailure;
break;
default:
e = UnknownError;
break;
}
} else if ( waitForMore( 0, &timeout ) == 0 ) {
if ( !timeout ) {
// connection closed
close();
}
}
}
return r;
}
/*!
\overload
Writes \a len bytes to the socket from \a data and returns the
number of bytes written. Returns -1 if an error occurred.
This is used for \c TQSocketDevice::Datagram sockets. You must
specify the \a host and \a port of the destination of the data.
*/
TQ_LONG TQSocketDevice::writeBlock( const char * data, TQ_ULONG len,
const TQHostAddress & host, TQ_UINT16 port )
{
if ( t != Datagram ) {
#if defined(TQT_CHECK_STATE) || defined(TQSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::sendBlock: Not datagram" );
#endif
return -1; // for now - later we can do t/tcp
}
if ( data == 0 && len != 0 ) {
#if defined(TQT_CHECK_NULL) || defined(TQSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::sendBlock: Null pointer error" );
#endif
return -1;
}
if ( !isValid() ) {
#if defined(TQT_CHECK_STATE) || defined(TQSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::sendBlock: Invalid socket" );
#endif
return -1;
}
if ( !isOpen() ) {
#if defined(TQT_CHECK_STATE) || defined(TQSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::sendBlock: Device is not open" );
#endif
return -1;
}
if ( !isWritable() ) {
#if defined(TQT_CHECK_STATE) || defined(TQSOCKETDEVICE_DEBUG)
qWarning( "TQSocketDevice::sendBlock: Write operation not permitted" );
#endif
return -1;
}
struct sockaddr_in a4;
struct sockaddr *aa;
TQT_SOCKLEN_T slen;
#if !defined(TQT_NO_IPV6)
struct sockaddr_in6 a6;
if ( host.isIPv6Address() ) {
memset( &a6, 0, sizeof(a6) );
a6.sin6_family = AF_INET6;
a6.sin6_port = htons( port );
TQ_IPV6ADDR tmp = host.toIPv6Address();
memcpy( &a6.sin6_addr.s6_addr, &tmp, sizeof(tmp) );
slen = sizeof( a6 );
aa = (struct sockaddr *)&a6;
} else
#endif
if ( host.isIPv4Address() ) {
memset( &a4, 0, sizeof(a4) );
a4.sin_family = AF_INET;
a4.sin_port = htons( port );
a4.sin_addr.s_addr = htonl( host.toIPv4Address() );
slen = sizeof(a4);
aa = (struct sockaddr *)&a4;
} else {
e = Impossible;
return -1;
}
// we'd use MSG_DONTWAIT + MSG_NOTQT_SIGNAL if Stevens were right.
// but apparently Stevens and most implementors disagree
bool done = FALSE;
int r = 0;
while ( !done ) {
r = ::sendto( fd, data, len, 0, aa, slen);
done = TRUE;
if ( r < 0 && e == NoError &&
errno != EAGAIN && errno != EWOULDBLOCK ) {
switch( errno ) {
case EINTR: // signal - call read() or whatever again
done = FALSE;
break;
case ENOSPC:
case EPIPE:
case EIO:
case EISDIR:
case EBADF:
case EINVAL:
case EFAULT:
case ENOTCONN:
case ENOTSOCK:
e = Impossible;
break;
#if defined(ENONET)
case ENONET:
#endif
case EHOSTUNREACH:
case ENETDOWN:
case ENETUNREACH:
case ETIMEDOUT:
e = NetworkFailure;
break;
default:
e = UnknownError;
break;
}
}
}
return r;
}
/*!
Fetches information about both ends of the connection: whatever is
available.
*/
void TQSocketDevice::fetchConnectionParameters()
{
if ( !isValid() ) {
p = 0;
a = TQHostAddress();
pp = 0;
pa = TQHostAddress();
return;
}
#if !defined(TQT_NO_IPV6)
struct sockaddr_storage sa;
#else
struct sockaddr_in sa;
#endif
memset( &sa, 0, sizeof(sa) );
TQT_SOCKLEN_T sz;
sz = sizeof( sa );
if ( !::getsockname( fd, (struct sockaddr *)(&sa), &sz ) )
qt_socket_getportaddr( (struct sockaddr *)&sa, &p, &a );
sz = sizeof( sa );
if ( !::getpeername( fd, (struct sockaddr *)(&sa), &sz ) )
qt_socket_getportaddr( (struct sockaddr *)&sa, &pp, &pa );
}
/*!
Returns the port number of the port this socket tqdevice is
connected to. This may be 0 for a while, but is set to something
sensible as soon as a sensible value is available.
Note that for Datagram sockets, this is the source port of the
last packet received, and that it is in native byte order.
*/
TQ_UINT16 TQSocketDevice::peerPort() const
{
return pp;
}
/*!
Returns the address of the port this socket tqdevice is connected
to. This may be 0.0.0.0 for a while, but is set to something
sensible as soon as a sensible value is available.
Note that for Datagram sockets, this is the source port of the
last packet received.
*/
TQHostAddress TQSocketDevice::peerAddress() const
{
return pa;
}
#endif //TQT_NO_NETWORK
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