DatagramSocket.cxx
上传用户:sy_wanhua
上传日期:2013-07-25
资源大小:3048k
文件大小:15k
- /* ====================================================================
- * The Vovida Software License, Version 1.0
- *
- * Copyright (c) 2000 Vovida Networks, Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The names "VOCAL", "Vovida Open Communication Application Library",
- * and "Vovida Open Communication Application Library (VOCAL)" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact vocal@vovida.org.
- *
- * 4. Products derived from this software may not be called "VOCAL", nor
- * may "VOCAL" appear in their name, without prior written
- * permission of Vovida Networks, Inc.
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
- * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL VOVIDA
- * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
- * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- * ====================================================================
- *
- * This software consists of voluntary contributions made by Vovida
- * Networks, Inc. and many individuals on behalf of Vovida Networks,
- * Inc. For more information on Vovida Networks, Inc., please see
- * <http://www.vovida.org/>.
- *
- */
- static const char* const DatagramSocket_cxx_Version =
- "$Id: DatagramSocket.cxx,v 1.21 2001/06/26 22:54:22 icahoon Exp $";
- #include "DatagramSocket.hxx"
- #include "TransportCommon.hxx"
- #include "SystemException.hxx"
- #include "SystemStatus.hxx"
- #include "VLog.hxx"
- #include <cerrno>
- #include <sys/types.h>
- using Vocal::Transport::DatagramSocket;
- using Vocal::Transport::Socket;
- using Vocal::Transport::TransportAddress;
- using Vocal::Transport::AddressFamily;
- using Vocal::Transport::SocketType;
- using Vocal::Logging::VLog;
- DatagramSocket::DatagramSocket(
- const AddressFamily & addressFamily,
- const char * name
- )
- throw ( Vocal::SystemException )
- : Socket( addressFamily,
- SocketType(SOCK_DGRAM),
- (name ? name : "Datagram")),
- remoteAddr_(0),
- localAddrUpdated_(false)
- {
- }
- DatagramSocket::DatagramSocket(
- const TransportAddress & localAddr,
- const char * name
- )
- throw ( Vocal::SystemException )
- : Socket(localAddr,
- SocketType(SOCK_DGRAM),
- (name ? name : "Datagram")),
- remoteAddr_(0),
- localAddrUpdated_(false)
- {
- }
- DatagramSocket::DatagramSocket(
- const TransportAddress & localAddr,
- const TransportAddress & remoteAddr,
- const char * name
- )
- throw ( Vocal::SystemException )
- : Socket(localAddr,
- SocketType(SOCK_DGRAM),
- (name ? name : "Datagram")),
- remoteAddr_(0),
- localAddrUpdated_(false)
- {
- connect(remoteAddr);
- }
- DatagramSocket::~DatagramSocket()
- {
- }
- void
- DatagramSocket::connect(
- const TransportAddress & remoteAddr
- )
- throw ( Vocal::SystemException )
- {
- const string fn("DatagramSocket::connect");
- VLog log(fn);
-
- if ( remoteAddr_ == 0 )
- {
- remoteAddr_ = remoteAddr.clone();
- }
-
- if ( ::connect(fd_,
- remoteAddr_->getAddress(),
- remoteAddr_->getAddressLength()) < SUCCESS
- )
- {
- throw Vocal::SystemException(fn + " on connect(): " + strerror(errno),
- __FILE__, __LINE__, errno);
- }
- VDEBUG(log) << fn << ": fd = " << fd_
- << " connected to remote address = "
- << *remoteAddr_ << VDEBUG_END(log);
- }
- void
- DatagramSocket::disconnect()
- throw ( Vocal::SystemException )
- {
- const string fn("DatagramSocket::disconnect");
- VLog log(fn);
- if ( !remoteAddr_ )
- {
- return;
- }
-
- sockaddr sa;
- sa.sa_family = AF_UNSPEC;
-
- if ( ::connect(fd_, &sa, sizeof(sa)) )
- {
- throw Vocal::SystemException(fn + " on disconnect(): " + strerror(errno),
- __FILE__, __LINE__, errno);
- }
- VDEBUG(log) << fn << ": fd = " << fd_
- << " disconnected from remote address = "
- << *remoteAddr_ << VDEBUG_END(log);
- remoteAddr_ = 0;
- }
-
- int
- DatagramSocket::send(const string & message)
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( !remoteAddr_ || message.size() == 0 )
- {
- return ( 0 );
- }
- void * msg = reinterpret_cast<void *>(const_cast<char *>(message.c_str()));
-
- return ( sendMessage(msg, message.size(), 0) );
- }
- int
- DatagramSocket::send(const char * message)
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- size_t messageLength = ( message ? strlen(message) : 0 );
-
- if ( !remoteAddr_ || messageLength == 0 )
- {
- return ( 0 );
- }
- void * msg = reinterpret_cast<void *>(const_cast<char *>(message));
-
- return ( sendMessage(msg, messageLength, 0) );
- }
- int
- DatagramSocket::send(const vector<u_int8_t> & message)
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( !remoteAddr_ || message.size() == 0 )
- {
- return ( 0 );
- }
- void * msg = reinterpret_cast<void *>(const_cast<u_int8_t *>(&message[0]));
- return ( sendMessage(msg, message.size(), 0) );
- }
- int
- DatagramSocket::send(const u_int8_t * message, size_t messageLength)
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( !remoteAddr_ || message == 0 || messageLength == 0 )
- {
- return ( 0 );
- }
- void * msg = reinterpret_cast<void *>(const_cast<u_int8_t *>(message));
- return ( sendMessage(msg, messageLength, 0) );
- }
- int
- DatagramSocket::sendTo(
- const string & message,
- const TransportAddress & remoteAddress
- )
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( message.size() == 0 )
- {
- return ( 0 );
- }
- void * msg = reinterpret_cast<void *>(const_cast<char *>(message.c_str()));
- return ( sendMessage(msg, message.size(), &remoteAddress) );
- }
- int
- DatagramSocket::sendTo(
- const char * message,
- const TransportAddress & remoteAddress
- )
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- size_t messageLength = ( message ? strlen(message) : 0 );
-
- if ( messageLength == 0 )
- {
- return ( 0 );
- }
- void * msg = reinterpret_cast<void *>(const_cast<char *>(message));
- return ( sendMessage(msg, messageLength, &remoteAddress) );
- }
- int
- DatagramSocket::sendTo(
- const vector<u_int8_t> & message,
- const TransportAddress & remoteAddress
- )
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( message.size() == 0 )
- {
- return ( 0 );
- }
- void * msg = reinterpret_cast<void *>(const_cast<u_int8_t *>(&message[0]));
- return ( sendMessage(msg, message.size(), &remoteAddress) );
- }
- int
- DatagramSocket::sendTo(
- const u_int8_t * message,
- size_t messageLength,
- const TransportAddress & remoteAddress
- )
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( message == 0 || messageLength == 0 )
- {
- return ( 0 );
- }
- void * msg = reinterpret_cast<void *>(const_cast<u_int8_t *>(message));
- return ( sendMessage(msg, messageLength, &remoteAddress) );
- }
- int
- DatagramSocket::receive(string & message)
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( !remoteAddr_ )
- {
- return ( 0 );
- }
-
- void * msg = reinterpret_cast<void *>(const_cast<char *>(message.data()));
- int bytesReceived = recvMessage(msg, message.size(), 0);
- message.resize(bytesReceived);
-
- return ( bytesReceived );
- }
- int
- DatagramSocket::receive(char * message, size_t messageCapacity)
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( !remoteAddr_ || message == 0 || messageCapacity == 0 )
- {
- return ( 0 );
- }
-
- void * msg = reinterpret_cast<void *>(message);
- int bytesReceived = recvMessage(msg, (messageCapacity > 1 ? messageCapacity-1 : 1 ), 0);
-
- if ( messageCapacity > 1 )
- {
- message[bytesReceived] = ' ';
- }
- return ( bytesReceived );
- }
- int
- DatagramSocket::receive(vector<u_int8_t> & message)
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( !remoteAddr_ )
- {
- return ( 0 );
- }
-
- message.clear();
-
- void * msg = reinterpret_cast<void *>(&message[0]);
- int bytesReceived = recvMessage(msg, message.size(), 0);
- return ( bytesReceived );
- }
- int
- DatagramSocket::receive(u_int8_t * message, size_t messageCapacity)
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( !remoteAddr_ || message == 0 || messageCapacity == 0 )
- {
- return ( 0 );
- }
-
- void * msg = reinterpret_cast<void *>(message);
- int bytesReceived = recvMessage(msg, messageCapacity, 0);
-
- return ( bytesReceived );
- }
- int
- DatagramSocket::receiveFrom(
- string & message,
- TransportAddress & remoteAddress
- )
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- void * msg = reinterpret_cast<void *>(const_cast<char *>(message.data()));
-
- int bytesReceived = recvMessage(msg, message.size(), &remoteAddress);
- message.resize(bytesReceived);
-
- return ( bytesReceived );
- }
- int
- DatagramSocket::receiveFrom(
- char * message,
- size_t messageCapacity,
- TransportAddress & remoteAddress
- )
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( message == 0 || messageCapacity == 0 )
- {
- return ( 0 );
- }
-
- void * msg = reinterpret_cast<void *>(message);
-
- int bytesReceived = recvMessage(msg, (messageCapacity > 1 ? messageCapacity-1 : 1 ), &remoteAddress);
- if ( messageCapacity > 1 )
- {
- message[bytesReceived] = ' ';
- }
-
- return ( bytesReceived );
- }
- int
- DatagramSocket::receiveFrom(
- vector<u_int8_t> & message,
- TransportAddress & remoteAddress
- )
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- message.clear();
-
- void * msg = reinterpret_cast<void *>(&message[0]);
-
- int bytesReceived = recvMessage(msg, message.size(), &remoteAddress);
- message.resize(bytesReceived);
-
- return ( bytesReceived );
- }
- int
- DatagramSocket::receiveFrom(
- u_int8_t * message,
- size_t messageCapacity,
- TransportAddress & remoteAddress
- )
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- if ( message == 0 || messageCapacity == 0 )
- {
- return ( 0 );
- }
-
- void * msg = reinterpret_cast<void *>(message);
-
- return ( recvMessage(msg, messageCapacity, &remoteAddress) );
- }
- Sptr<TransportAddress>
- DatagramSocket::getRemoteAddress() const
- {
- return ( remoteAddr_ );
- }
- ostream &
- DatagramSocket::writeTo(ostream & out) const
- {
- Socket::writeTo(out);
-
- if ( remoteAddr_ != 0 )
- {
- out << ", remote = " << *remoteAddr_;
- }
- return ( out );
- }
- int
- DatagramSocket::sendMessage(
- void * message,
- int messageLength,
- const TransportAddress * addr
- )
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- const string fn("DatagramSocket::send");
- VLog log(fn);
- int bytesSent = 0;
-
- if ( addr )
- {
- bytesSent = ::sendto( fd_,
- message,
- messageLength,
- 0,
- addr->getAddress(),
- addr->getAddressLength());
- }
- else
- {
- bytesSent = ::send( fd_,
- message,
- messageLength, 0);
- }
-
- if ( bytesSent < SUCCESS )
- {
- int error = errno;
-
- // If the socket is set nonblocking, we can get an EAGAIN
- // here, without sending the packet. If the socket is set
- // blocking we can get an EINTR here, without sending the packet.
- //
- if ( error == EAGAIN || error == EINTR )
- {
- throw Vocal::SystemStatus(fn + " on send(): " + strerror(error),
- __FILE__, __LINE__, error);
- }
- throw Vocal::SystemException(fn + " on send(): " + strerror(error),
- __FILE__, __LINE__, error);
- }
- totalBytesSent_ += bytesSent;
-
- VDEBUG(log) << fn << ": send on " << *this
- << ", bytes sent: " << bytesSent
- << ", of total: " << messageLength
- << VDEBUG_END(log);
- return ( bytesSent );
- }
- int
- DatagramSocket::recvMessage(
- void * message,
- int messageCapacity,
- TransportAddress * addr
- )
- throw ( Vocal::SystemException, Vocal::SystemStatus )
- {
- const string fn("DatagramSocket::receive");
- VLog log(fn);
- int bytesReceived = 0;
- if ( addr )
- {
- AddressFamily af = addr->getAddressFamily();
-
- socklen_t addrLength = addr->getAddressLength();
-
- bytesReceived = ::recvfrom( fd_,
- message,
- messageCapacity,
- 0,
- addr->getAddress(),
- &addrLength);
- // They gave us the wrong type of address. duh.
- //
- if ( af != addr->getAddressFamily() )
- {
- throw Vocal::SystemException(fn + " on recvfrom(): incorrect address type",
- __FILE__, __LINE__);
- }
- }
- else
- {
- bytesReceived = ::recvfrom( fd_,
- message,
- messageCapacity,
- 0,
- 0,
- 0);
- }
- if ( bytesReceived < SUCCESS )
- {
- int error = errno;
-
- // If the socket is set nonblocking, we can get an EAGAIN
- // here, without receiving the packet. If the socket is set
- // blocking we can get an EINTR here, without receiving the packet.
- //
- if ( error == EAGAIN || error == EINTR )
- {
- throw Vocal::SystemStatus(fn + " on recv(): " + strerror(error),
- __FILE__, __LINE__, error);
- }
- throw Vocal::SystemException(fn + " on recv(): " + strerror(error),
- __FILE__, __LINE__, error);
- }
- if ( !localAddrUpdated_ )
- {
- localAddrUpdated_ = true;
- localAddr_->updateAddress(*this);
- }
-
- totalBytesReceived_ += bytesReceived;
- VDEBUG(log) << fn << ": received on " << *this
- << ", bytes received: " << bytesReceived
- << ", of capacity: " << messageCapacity
- << VDEBUG_END(log);
- return ( bytesReceived );
- }