A network socket. More...

#include <XrdClSocket.hh>

Collaboration diagram for XrdCl::Socket:

Public Types
enum	SocketStatus { Disconnected = 1 , Connected = 2 , Connecting = 3 }
	Status of the socket. More...

Public Member Functions
	Socket (int socket=-1, SocketStatus status=Disconnected)

virtual	~Socket ()
	Desctuctor.

void	Close ()
	Disconnect.

XRootDStatus	Connect (const std::string &host, uint16_t port, uint16_t timout=10)

XRootDStatus	ConnectToAddress (const XrdNetAddr &addr, uint16_t timout=10)

XRootDStatus	Cork ()

XRootDStatus	Flash ()

const AnyObject *	GetChannelID () const

int	GetFD () const
	Get the file descriptor.

XRootDStatus	GetFlags (int &flags)
	Get the socket flags (man fcntl)

std::string	GetName () const
	Get the string representation of the socket.

std::string	GetPeerName () const
	Get the name of the remote peer.

const XrdNetAddr *	GetServerAddress () const
	Get the server address.

std::string	GetSockName () const
	Get the name of the socket.

XRootDStatus	GetSockOpt (int level, int optname, void optval, socklen_t optlen)
	Get socket options.

SocketStatus	GetStatus () const
	Get the socket status.

XRootDStatus	Initialize (int family=AF_INET)
	Initialize the socket.

bool	IsCorked () const

bool	IsEncrypted ()

uint8_t	MapEvent (uint8_t event)

virtual XRootDStatus	Read (char *buffer, size_t size, int &bytesRead)

XRootDStatus	ReadRaw (void *buffer, uint32_t size, int32_t timeout, uint32_t &bytesRead)
	Read raw bytes from the socket.

XRootDStatus	ReadV (iovec *iov, int iocnt, int &bytesRead)

virtual XRootDStatus	Send (const char *buffer, size_t size, int &bytesWritten)

XRootDStatus	Send (Message &msg, const std::string &strmname)

XRootDStatus	Send (XrdSys::KernelBuffer &kbuff, int &bytesWritten)

void	SetChannelID (AnyObject *channelID)

XRootDStatus	SetFlags (int flags)
	Set the socket flags (man fcntl)

XRootDStatus	SetSockOpt (int level, int optname, const void *optval, socklen_t optlen)
	Set socket options.

void	SetStatus (SocketStatus status)
	Set socket status - do not use unless you know what you're doing.

XRootDStatus	TlsHandShake (AsyncSocketHandler *socketHandler, const std::string &thehost=std::string())

XRootDStatus	Uncork ()

XRootDStatus	WriteRaw (void *buffer, uint32_t size, int32_t timeout, uint32_t &bytesWritten)

Static Public Member Functions
static XRootDStatus	ClassifyErrno (int error)

Protected Member Functions
XRootDStatus	Poll (bool readyForReading, bool readyForWriting, int32_t timeout)

Protected Attributes
AnyObject *	pChannelID

bool	pCorked

std::string	pName

std::string	pPeerName

int	pProtocolFamily

std::unique_ptr< XrdNetAddr >	pServerAddr

int	pSocket

std::string	pSockName

SocketStatus	pStatus

std::unique_ptr< Tls >	pTls

Detailed Description

A network socket.

Definition at line 42 of file XrdClSocket.hh.

Member Enumeration Documentation

◆ SocketStatus

enum XrdCl::Socket::SocketStatus

Status of the socket.

Enumerator
Disconnected	The socket is disconnected.
Connected	The socket is connected.
Connecting	The connection process is in progress.

Definition at line 48 of file XrdClSocket.hh.

      {
        Disconnected  = 1,      
        Connected     = 2,      
        Connecting    = 3       
      };

Constructor & Destructor Documentation

◆ Socket()

XrdCl::Socket::Socket	(	int	socket = `-1`,
		SocketStatus	status = `Disconnected`
	)

Constructor

Parameters

socket	already connected socket if available, -1 otherwise
status	status of a socket if available

Definition at line 44 of file XrdClSocket.cc.

                                                 :
    pSocket(socket), pStatus( status ),
    pProtocolFamily( AF_INET ),
    pChannelID( 0 ),
    pCorked( false )
  {
  };

◆ ~Socket()

XrdCl::Socket::~Socket ( )

virtual

Desctuctor.

Definition at line 55 of file XrdClSocket.cc.

  {
    Close();
  };

References Close().

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Member Function Documentation

◆ ClassifyErrno()

XRootDStatus XrdCl::Socket::ClassifyErrno ( int error )

static

Definition at line 692 of file XrdClSocket.cc.

  {
    switch( errno )
    {
 
      case EAGAIN:
#if EAGAIN != EWOULDBLOCK
      case EWOULDBLOCK:
#endif
      {
        //------------------------------------------------------------------
        // Reading/writing operation would block! So we are done for now,
        // but we will be back ;-)
        //------------------------------------------------------------------
        return XRootDStatus( stOK, suRetry );
      }
      case ECONNRESET:
      case EDESTADDRREQ:
      case EMSGSIZE:
      case ENOTCONN:
      case ENOTSOCK:
      {
        //------------------------------------------------------------------
        // Actual socket error error!
        //------------------------------------------------------------------
        return XRootDStatus( stError, errSocketError, errno );
      }
      case EFAULT:
      {
        //------------------------------------------------------------------
        // The buffer provided by the user for reading/writing is invalid
        //------------------------------------------------------------------
        return XRootDStatus( stError, errInvalidArgs );
      }
      default:
      {
        //------------------------------------------------------------------
        // Not a socket error
        //------------------------------------------------------------------
        return XRootDStatus( stError, errInternal, errno );
      }
    }
  }

References XrdCl::errInternal, XrdCl::errInvalidArgs, XrdCl::errSocketError, XrdCl::stError, XrdCl::stOK, and XrdCl::suRetry.

Referenced by Read(), ReadV(), Send(), and Send().

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◆ Close()

void XrdCl::Socket::Close ( )

Disconnect.

Definition at line 262 of file XrdClSocket.cc.

  {
    if( pTls ) pTls->Shutdown();
 
    if( pSocket != -1 )
    {
      close( pSocket );
      pStatus      = Disconnected;
      pSocket      = -1;
      pSockName    = "";
      pPeerName    = "";
      pName        = "";
    }
  }

References close, Disconnected, pName, pPeerName, pSocket, pSockName, pStatus, and pTls.

Referenced by ~Socket(), XrdCl::AsyncSocketHandler::Close(), XrdCl::AsyncSocketHandler::Connect(), ConnectToAddress(), Initialize(), ReadRaw(), and WriteRaw().

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◆ Connect()

XRootDStatus XrdCl::Socket::Connect	(	const std::string &	host,
		uint16_t	port,
		uint16_t	timout = `10`
	)

Connect to the given host name

Parameters

host	name of the host to connect to
port	port to connect to
timout	timeout in seconds, 0 for no timeout handling (may be used for non blocking IO)

Definition at line 183 of file XrdClSocket.cc.

  {
    if( pSocket == -1 || pStatus == Connected || pStatus == Connecting )
      return XRootDStatus( stError, errInvalidOp );
 
    std::vector<XrdNetAddr> addrs;
    std::ostringstream o; o << host << ":" << port;
    XRootDStatus st;
 
    if( pProtocolFamily == AF_INET6 )
      st = Utils::GetHostAddresses( addrs, URL( o.str() ), Utils::IPAll );
    else
      st = Utils::GetHostAddresses( addrs, URL( o.str() ), Utils::IPv4 );
 
    if( !st.IsOK() )
      return st;
 
    Utils::LogHostAddresses( DefaultEnv::GetLog(), PostMasterMsg, o.str(),
                             addrs );
 
 
    return ConnectToAddress( addrs[0], timeout );
  }

References Connected, Connecting, ConnectToAddress(), XrdCl::errInvalidOp, XrdCl::Utils::GetHostAddresses(), XrdCl::DefaultEnv::GetLog(), XrdCl::Utils::IPAll, XrdCl::Utils::IPv4, XrdCl::Status::IsOK(), XrdCl::Utils::LogHostAddresses(), XrdCl::PostMasterMsg, pProtocolFamily, pSocket, pStatus, and XrdCl::stError.

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◆ ConnectToAddress()

XRootDStatus XrdCl::Socket::ConnectToAddress	(	const XrdNetAddr &	addr,
		uint16_t	timout = `10`
	)

Connect to the given host address

Parameters

addr	address of the host to connect to
timout	timeout in seconds, 0 for no timeout handling (may be used for non blocking IO)

Definition at line 212 of file XrdClSocket.cc.

  {
    if( pSocket == -1 || pStatus == Connected || pStatus == Connecting )
      return XRootDStatus( stError, errInvalidOp );
 
    pServerAddr.reset( new XrdNetAddr( addr ) );;
 
    //--------------------------------------------------------------------------
    // Make sure TLS is off when the physical connection is newly established
    //--------------------------------------------------------------------------
    pTls.reset();
 
    //--------------------------------------------------------------------------
    // Connect
    //--------------------------------------------------------------------------
    int status = XrdNetConnect::Connect( pSocket, pServerAddr->SockAddr(),
                                         pServerAddr->SockSize(), timeout );
    if( status != 0 )
    {
      XRootDStatus st( stError );
 
      //------------------------------------------------------------------------
      // If we connect asynchronously this is not really an error
      //------------------------------------------------------------------------
      if( !timeout && status == EINPROGRESS )
      {
        pStatus = Connecting;
        return XRootDStatus();
      }
 
      //------------------------------------------------------------------------
      // Errors
      //------------------------------------------------------------------------
      else if( status == ETIMEDOUT )
        st.code = errSocketTimeout;
      else
        st.code = errSocketError;
      st.errNo = status;
 
      Close();
      return st;
    }
    pStatus = Connected;
    return XRootDStatus();
  }

References Close(), XrdCl::Status::code, XrdNetConnect::Connect(), Connected, Connecting, XrdCl::errInvalidOp, XrdCl::Status::errNo, XrdCl::errSocketError, XrdCl::errSocketTimeout, pServerAddr, pSocket, pStatus, pTls, and XrdCl::stError.

Referenced by Connect(), and XrdCl::AsyncSocketHandler::Connect().

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◆ Cork()

XRootDStatus XrdCl::Socket::Cork ( )

Definition at line 782 of file XrdClSocket.cc.

  {
#if defined(TCP_CORK) && !defined(__GNU__)
    // it's not defined on mac, we might want explore the possibility of using TCP_NOPUSH
    if( pCorked ) return XRootDStatus();
 
    int state = 1;
    int rc = setsockopt( pSocket, IPPROTO_TCP, TCP_CORK, &state, sizeof( state ) );
    if( rc != 0 )
      return XRootDStatus( stFatal, errSocketOptError, errno );
#endif
    pCorked = true;
    return XRootDStatus();
  }

References XrdCl::errSocketOptError, IPPROTO_TCP, pCorked, pSocket, and XrdCl::stFatal.

Referenced by Flash(), and XrdCl::AsyncSocketHandler::OnConnectionReturn().

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◆ Flash()

XRootDStatus XrdCl::Socket::Flash ( )

Definition at line 818 of file XrdClSocket.cc.

  {
    //----------------------------------------------------------------------
    // Uncork the socket in order to flash the socket
    //----------------------------------------------------------------------
    XRootDStatus st = Uncork();
    if( !st.IsOK() ) return st;
 
    //----------------------------------------------------------------------
    // Once the data has been flashed we can cork the socket back
    //----------------------------------------------------------------------
    return Cork();
  }

References Cork(), XrdCl::Status::IsOK(), and Uncork().

Referenced by XrdCl::AsyncHSWriter::Write(), and XrdCl::AsyncMsgWriter::Write().

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◆ GetChannelID()

const AnyObject * XrdCl::Socket::GetChannelID ( ) const

inline

Get Channel ID (an object that allows to identify all sockets corresponding to the same channel)

Definition at line 255 of file XrdClSocket.hh.

      {
        return pChannelID;
      }

References pChannelID.

◆ GetFD()

int XrdCl::Socket::GetFD ( ) const

inline

Get the file descriptor.

Definition at line 214 of file XrdClSocket.hh.

      {
        return pSocket;
      }

References pSocket.

Referenced by XrdCl::Tls::Tls(), XrdCl::PollerBuiltIn::AddSocket(), and XrdCl::PollerBuiltIn::Start().

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◆ GetFlags()

XRootDStatus XrdCl::Socket::GetFlags ( int & flags )

Get the socket flags (man fcntl)

Definition at line 137 of file XrdClSocket.cc.

  {
    if( pSocket == -1 )
      return XRootDStatus( stError, errInvalidOp );
 
    int st = ::fcntl( pSocket, F_GETFL, 0 );
    if( st == -1 )
      return XRootDStatus( stError, errSocketError, errno );
    flags = st;
    return XRootDStatus();
  }

References XrdCl::errInvalidOp, XrdCl::errSocketError, fcntl(), pSocket, and XrdCl::stError.

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◆ GetName()

std::string XrdCl::Socket::GetName ( ) const

Get the string representation of the socket.

Definition at line 672 of file XrdClSocket.cc.

  {
    if( pStatus != Connected )
      return "<x><--><x>";
 
    if( pName.length() )
      return pName;
 
    pName = "<";
    pName += GetSockName();
    pName += "><--><";
    pName += GetPeerName();
    pName += ">";
    return pName;
  }

References Connected, GetPeerName(), GetSockName(), pName, and pStatus.

Referenced by XrdCl::PollerBuiltIn::AddSocket(), XrdCl::PollerBuiltIn::EnableReadNotification(), XrdCl::PollerBuiltIn::EnableWriteNotification(), XrdCl::PollerBuiltIn::RemoveSocket(), and XrdCl::PollerBuiltIn::Stop().

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◆ GetPeerName()

std::string XrdCl::Socket::GetPeerName ( ) const

Get the name of the remote peer.

Definition at line 652 of file XrdClSocket.cc.

  {
    if( pStatus != Connected )
      return "";
 
    if( pPeerName.length() )
      return pPeerName;
 
    char      nameBuff[256];
    int len = XrdNetUtils::IPFormat( pSocket, nameBuff, sizeof(nameBuff) );
    if( len == 0 )
      return "";
 
    pPeerName = nameBuff;
    return pPeerName;
  }

References Connected, XrdNetUtils::IPFormat(), pPeerName, pSocket, and pStatus.

Referenced by GetName().

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◆ GetServerAddress()

const XrdNetAddr * XrdCl::Socket::GetServerAddress ( ) const

inline

Get the server address.

Definition at line 237 of file XrdClSocket.hh.

      {
        return pServerAddr.get();
      }

References pServerAddr.

Referenced by XrdCl::AsyncSocketHandler::OnConnectionReturn().

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◆ GetSockName()

std::string XrdCl::Socket::GetSockName ( ) const

Get the name of the socket.

Definition at line 632 of file XrdClSocket.cc.

  {
    if( pStatus != Connected )
      return "";
 
    if( pSockName.length() )
      return pSockName;
 
    char      nameBuff[256];
    int len = XrdNetUtils::IPFormat( -pSocket, nameBuff, sizeof(nameBuff) );
    if( len == 0 )
      return "";
 
    pSockName = nameBuff;
    return pSockName;
  }

References Connected, XrdNetUtils::IPFormat(), pSocket, pSockName, and pStatus.

Referenced by GetName(), and XrdCl::AsyncSocketHandler::OnConnectionReturn().

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◆ GetSockOpt()

XRootDStatus XrdCl::Socket::GetSockOpt	(	int	level,
		int	optname,
		void *	optval,
		socklen_t *	optlen
	)

Get socket options.

Definition at line 152 of file XrdClSocket.cc.

  {
    if( pSocket == -1 )
      return XRootDStatus( stError, errInvalidOp );
 
    if( ::getsockopt( pSocket, level, optname, optval, optlen ) != 0 )
      return XRootDStatus( stError, errSocketOptError, errno );
 
    return XRootDStatus();
  }

References XrdCl::errInvalidOp, XrdCl::errSocketOptError, pSocket, and XrdCl::stError.

Referenced by XrdCl::AsyncSocketHandler::OnConnectionReturn().

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◆ GetStatus()

SocketStatus XrdCl::Socket::GetStatus ( ) const

inline

Get the socket status.

Definition at line 125 of file XrdClSocket.hh.

      {
        return pStatus;
      }

References pStatus.

Referenced by XrdCl::PollerBuiltIn::AddSocket(), and XrdCl::AsyncSocketHandler::EventWrite().

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◆ Initialize()

XRootDStatus XrdCl::Socket::Initialize ( int family = AF_INET )

Initialize the socket.

Definition at line 63 of file XrdClSocket.cc.

  {
    if( pSocket != -1 )
      return XRootDStatus( stError, errInvalidOp );
 
    pSocket = XrdSysFD_Socket( family, SOCK_STREAM, 0 );
    if( pSocket < 0 )
    {
      pSocket = -1;
      return XRootDStatus( stError, errSocketError );
    }
 
    pProtocolFamily = family;
 
    //--------------------------------------------------------------------------
    // Make the socket non blocking and disable the Nagle algorithm since
    // we will be using this for transmitting messages not handling streams
    //--------------------------------------------------------------------------
    int flags;
    if( (flags = ::fcntl( pSocket, F_GETFL, 0 )) == -1 )
      flags = 0;
    if( ::fcntl( pSocket, F_SETFL, flags | O_NONBLOCK | O_NDELAY ) == -1 )
    {
      Close();
      return XRootDStatus( stError, errFcntl, errno );
    }
 
    XrdCl::Env *env = XrdCl::DefaultEnv::GetEnv();
    flags = DefaultNoDelay;
    env->GetInt( "NoDelay", flags );
    if( setsockopt( pSocket, IPPROTO_TCP, TCP_NODELAY, &flags, sizeof( int ) ) < 0 )
    {
      Close();
      return XRootDStatus( stError, errFcntl, errno );
    }
 
    //--------------------------------------------------------------------------
    // We use send with MSG_NOSIGNAL to avoid SIGPIPEs on Linux, on MacOSX
    // we set SO_NOSIGPIPE option, on Solaris we ignore the SIGPIPE
    //--------------------------------------------------------------------------
#ifdef __APPLE__
    int set = 1;
    XRootDStatus st = SetSockOpt( SOL_SOCKET, SO_NOSIGPIPE, &set, sizeof(int) );
    if( !st.IsOK() )
    {
      Close();
      return st;
    }
#elif __solaris__
    struct sigaction act;
    act.sa_handler = SIG_IGN;
    sigaction( SIGPIPE, &act, NULL );
#endif
 
    return XRootDStatus();
  }

References Close(), XrdCl::DefaultNoDelay, XrdCl::errFcntl, XrdCl::errInvalidOp, XrdCl::errSocketError, fcntl(), XrdCl::DefaultEnv::GetEnv(), XrdCl::Env::GetInt(), IPPROTO_TCP, XrdCl::Status::IsOK(), pProtocolFamily, pSocket, SetSockOpt(), and XrdCl::stError.

Referenced by XrdCl::AsyncSocketHandler::Connect().

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◆ IsCorked()

bool XrdCl::Socket::IsCorked ( ) const

inline

Definition at line 286 of file XrdClSocket.hh.

      {
        return pCorked;
      }

References pCorked.

Referenced by XrdCl::Tls::Connect(), XrdCl::Tls::Read(), and XrdCl::Tls::Send().

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◆ IsEncrypted()

bool XrdCl::Socket::IsEncrypted ( )

Definition at line 867 of file XrdClSocket.cc.

  {
    return bool( pTls.get() );
  }

References pTls.

Referenced by XrdCl::AsyncSocketHandler::HandleHandShake(), and XrdCl::XRootDMsgHandler::WriteMessageBody().

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◆ MapEvent()

uint8_t XrdCl::Socket::MapEvent ( uint8_t event )

Definition at line 835 of file XrdClSocket.cc.

  {
    if( pTls ) return pTls->MapEvent( event );
    return event;
  }

References pTls.

Referenced by XrdCl::AsyncSocketHandler::Event().

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◆ Poll()

XRootDStatus XrdCl::Socket::Poll	(	bool	readyForReading,
		bool	readyForWriting,
		int32_t	timeout
	)

protected

Poll the socket to see whether it is ready for IO

Parameters

readyForReading	poll for readiness to read
readyForWriting	poll for readiness to write
timeout	timeout in seconds, -1 to wait indefinitely

Returns: stOK - ready for IO errSocketDisconnected - on disconnection errSocketError - on socket error errSocketTimeout - on socket timeout errInvalidOp - when called on a non connected socket

Definition at line 541 of file XrdClSocket.cc.

  {
    //--------------------------------------------------------------------------
    // Check if we're connected
    //--------------------------------------------------------------------------
    if( pStatus != Connected )
      return XRootDStatus( stError, errInvalidOp );
 
    //--------------------------------------------------------------------------
    // Prepare the stuff
    //--------------------------------------------------------------------------
    pollfd   pollDesc;
    int      pollRet;
    bool     useTimeout = (timeout!=-1);
    time_t   now        = 0;
    time_t   newNow     = 0;
    short    hupEvents  = POLLHUP;
 
#ifdef __linux__
    hupEvents |= POLLRDHUP;
#endif
 
    if( useTimeout )
      now = ::time(0);
 
    pollDesc.fd     = pSocket;
    pollDesc.events = POLLERR | POLLNVAL | hupEvents;
 
    if( readyForReading )
      pollDesc.events |= (POLLIN | POLLPRI);
 
    if( readyForWriting )
      pollDesc.events |= POLLOUT;
 
    //--------------------------------------------------------------------------
    // We loop on poll because it may return -1 even thought no fatal error
    // has occurred, these may be:
    // * a signal interrupting the execution (errno == EINTR)
    // * a failure to initialize some internal structures (Solaris only)
    //   (errno == EAGAIN)
    //--------------------------------------------------------------------------
    do
    {
      pollRet = poll( &pollDesc, 1, (useTimeout ? timeout*1000 : -1) );
      if( (pollRet < 0) && (errno != EINTR) && (errno != EAGAIN) )
        return XRootDStatus( stError, errPoll, errno );
 
      //------------------------------------------------------------------------
      // Check if we did not time out in the case where we are not supposed
      // to wait indefinitely
      //------------------------------------------------------------------------
      if( useTimeout )
      {
        newNow   = time(0);
        timeout -= (newNow-now);
        now      = newNow;
        if( timeout < 0 )
          return XRootDStatus( stError, errSocketTimeout );
      }
    }
    while( pollRet == -1 );
 
    //--------------------------------------------------------------------------
    // Check if we have timed out
    //--------------------------------------------------------------------------
    if( pollRet == 0 )
      return XRootDStatus( stError, errSocketTimeout );
 
    //--------------------------------------------------------------------------
    // We have some events
    //--------------------------------------------------------------------------
    if( pollDesc.revents & (POLLIN | POLLPRI | POLLOUT) )
      return XRootDStatus( stOK );
 
    //--------------------------------------------------------------------------
    // We've been hang up on
    //--------------------------------------------------------------------------
    if( pollDesc.revents & hupEvents )
      return XRootDStatus( stError, errSocketDisconnected );
 
    //--------------------------------------------------------------------------
    // We're messed up, either because we messed up ourselves (POLLNVAL) or
    // got messed up by the network (POLLERR)
    //--------------------------------------------------------------------------
    return XRootDStatus( stError, errSocketError );
  }

References Connected, XrdCl::errInvalidOp, XrdCl::errPoll, XrdCl::errSocketDisconnected, XrdCl::errSocketError, XrdCl::errSocketTimeout, pSocket, pStatus, XrdCl::stError, and XrdCl::stOK.

Referenced by ReadRaw(), and WriteRaw().

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◆ Read()

XRootDStatus XrdCl::Socket::Read	(	char *	buffer,
		size_t	size,
		int &	bytesRead
	)

virtual

Read helper for raw socket

Parameters

buffer	: the sink for the data
size	: size of the sink
bytesRead	: number of bytes actually written into the sink

Returns: : success : ( stOK ) EAGAIN : ( stOK, suRetry ) EWOULDBLOCK : ( stOK, suRetry ) other error : ( stError, errSocketError )

Definition at line 740 of file XrdClSocket.cc.

  {
    if( pTls ) return pTls->Read( buffer, size, bytesRead );
 
    int status = ::read( pSocket, buffer, size );
 
    // if the server shut down the socket declare a socket error (it
    // will trigger a re-connect)
    if( status == 0 )
      return XRootDStatus( stError, errSocketError, errno );
 
    if( status < 0 )
      return ClassifyErrno( errno );
 
    bytesRead = status;
    return XRootDStatus();
  }

References ClassifyErrno(), XrdCl::errSocketError, pSocket, pTls, read, and XrdCl::stError.

Referenced by XrdCl::XRootDTransport::GetBody(), XrdCl::XRootDTransport::GetHeader(), XrdCl::XRootDTransport::GetMore(), and XrdCl::AsyncRawReaderIntfc::ReadBytesAsync().

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◆ ReadRaw()

XRootDStatus XrdCl::Socket::ReadRaw	(	void *	buffer,
		uint32_t	size,
		int32_t	timeout,
		uint32_t &	bytesRead
	)

Read raw bytes from the socket.

Read raw bytes from the socket

Parameters

buffer	data to be sent
size	size of the data buffer
timeout	timout value in seconds, -1 to wait indefinitely
bytesRead	the amount of data actually read

Definition at line 280 of file XrdClSocket.cc.

  {
    //--------------------------------------------------------------------------
    // Check if we're connected
    //--------------------------------------------------------------------------
    if( pStatus != Connected )
      return XRootDStatus( stError, errInvalidOp );
 
    //--------------------------------------------------------------------------
    // Some useful variables
    //--------------------------------------------------------------------------
    bytesRead = 0;
 
    char          *current    = (char *)buffer;
    bool           useTimeout = (timeout!=-1);
    time_t         now        = 0;
    time_t         newNow     = 0;
    XRootDStatus   sc;
 
    if( useTimeout )
      now = ::time(0);
 
    //--------------------------------------------------------------------------
    // Repeat the following until we have read all the requested data
    //--------------------------------------------------------------------------
    while ( bytesRead < size )
    {
      //------------------------------------------------------------------------
      // Check if we can read something
      //------------------------------------------------------------------------
      sc = Poll( true, false, useTimeout ? timeout : -1 );
 
      //------------------------------------------------------------------------
      // It looks like we've got an event. Let's check if we can read something.
      //------------------------------------------------------------------------
      if( sc.status == stOK )
      {
        ssize_t n = ::read( pSocket, current, (size-bytesRead) );
 
        if( n > 0 )
        {
          bytesRead += n;
          current   += n;
        }
 
        //----------------------------------------------------------------------
        // We got a close here - this means that there is no more data in
        // the buffer so we disconnect
        //----------------------------------------------------------------------
        if( n == 0 )
        {
          Close();
          return XRootDStatus( stError, errSocketDisconnected );
        }
 
        //----------------------------------------------------------------------
        // Error
        //----------------------------------------------------------------------
        if( (n < 0) && (errno != EAGAIN) && (errno != EWOULDBLOCK) )
        {
          Close();
          return XRootDStatus( stError, errSocketError, errno );
        }
      }
      else
      {
        Close();
        return sc;
      }
 
      //------------------------------------------------------------------------
      // Do we still have time to wait for data?
      //------------------------------------------------------------------------
      if( useTimeout )
      {
        newNow    = ::time(0);
        timeout -= (newNow-now);
        now       = newNow;
        if( timeout < 0 )
          break;
      }
    }
 
    //--------------------------------------------------------------------------
    // Have we managed to read everything?
    //--------------------------------------------------------------------------
    if( bytesRead < size )
      return XRootDStatus( stError, errSocketTimeout );
    return XRootDStatus( stOK );
  }

References Close(), Connected, XrdCl::errInvalidOp, XrdCl::errSocketDisconnected, XrdCl::errSocketError, XrdCl::errSocketTimeout, Poll(), pSocket, pStatus, read, XrdCl::Status::status, XrdCl::stError, and XrdCl::stOK.

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◆ ReadV()

XRootDStatus XrdCl::Socket::ReadV	(	iovec *	iov,
		int	iocnt,
		int &	bytesRead
	)

ReadV helper for raw socket

Parameters

iov	: the buffers for the data
iocnt	: number of buffers
bytesRead	: number of bytes actually written into the sink

Returns: : success : ( stOK ) EAGAIN : ( stOK, suRetry ) EWOULDBLOCK : ( stOK, suRetry ) other error : ( stError, errSocketError )

Definition at line 761 of file XrdClSocket.cc.

  {
    if( pTls ) return pTls->ReadV( iov, iovcnt, bytesRead );
 
    int status = ::readv( pSocket, iov, iovcnt );
 
    // if the server shut down the socket declare a socket error (it
    // will trigger a re-connect)
    if( status == 0 )
      return XRootDStatus( stError, errSocketError, errno );
 
    if( status < 0 )
      return ClassifyErrno( errno );
 
    bytesRead = status;
    return XRootDStatus();
  }

References ClassifyErrno(), XrdCl::errSocketError, pSocket, pTls, readv, and XrdCl::stError.

Referenced by XrdCl::AsyncPageReader::Read().

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◆ Send() [1/3]

XRootDStatus XrdCl::Socket::Send	(	const char *	buffer,
		size_t	size,
		int &	bytesWritten
	)

virtual

Portable wrapper around SIGPIPE free send

Parameters

buffer	: data to be written
size	: size of the data buffer
bytesWritten	: the amount of data actually written

Definition at line 461 of file XrdClSocket.cc.

  {
    if( pTls ) return pTls->Send( buffer, size, bytesWritten );
 
    //--------------------------------------------------------------------------
    // We use send with MSG_NOSIGNAL to avoid SIGPIPEs on Linux
    //--------------------------------------------------------------------------
#if defined(__linux__) || defined(__GNU__) || (defined(__FreeBSD_kernel__) && defined(__GLIBC__))
    int status = ::send( pSocket, buffer, size, MSG_NOSIGNAL );
#else
    int status = ::write( pSocket, buffer, size );
#endif
 
    if( status <= 0 )
      return ClassifyErrno( errno );
 
    bytesWritten = status;
    return XRootDStatus();
  }

References ClassifyErrno(), pSocket, pTls, and write.

Referenced by Send(), XrdCl::AsyncHSWriter::Write(), XrdCl::AsyncMsgWriter::Write(), and XrdCl::XRootDMsgHandler::WriteMessageBody().

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◆ Send() [2/3]

XRootDStatus XrdCl::Socket::Send	(	Message &	msg,
		const std::string &	strmname
	)

Write message to the socket

Parameters

msg	: message (request) to be sent
strmname	: stream name (for logging purposes)

Definition at line 503 of file XrdClSocket.cc.

  {
    //----------------------------------------------------------------------
    // Try to write down the current message
    //----------------------------------------------------------------------
    size_t btsleft = msg.GetSize() - msg.GetCursor();
    if( !btsleft ) return XRootDStatus();
 
    while( btsleft )
    {
      int wrtcnt = 0;
      XRootDStatus st = Send( msg.GetBufferAtCursor(), btsleft, wrtcnt );
 
      if( !st.IsOK() )
      {
        msg.SetCursor( 0 );
        return st;
      }
 
      if( st.code == suRetry ) return st;
 
      msg.AdvanceCursor( wrtcnt );
      btsleft -= wrtcnt;
    }
 
    //----------------------------------------------------------------------
    // We have written the message successfully
    //----------------------------------------------------------------------
    Log *log = DefaultEnv::GetLog();
    log->Dump( AsyncSockMsg, "[%s] Wrote a message: %s (%p), %d bytes",
               strmname.c_str(), msg.GetObfuscatedDescription().c_str(),
               &msg, msg.GetSize() );
    return XRootDStatus();
  }

References XrdCl::Buffer::AdvanceCursor(), XrdCl::AsyncSockMsg, XrdCl::Status::code, XrdCl::Log::Dump(), XrdCl::Buffer::GetBufferAtCursor(), XrdCl::Buffer::GetCursor(), XrdCl::DefaultEnv::GetLog(), XrdCl::Message::GetObfuscatedDescription(), XrdCl::Buffer::GetSize(), XrdCl::Status::IsOK(), Send(), XrdCl::Buffer::SetCursor(), and XrdCl::suRetry.

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◆ Send() [3/3]

XRootDStatus XrdCl::Socket::Send	(	XrdSys::KernelBuffer &	kbuff,
		int &	bytesWritten
	)

Write data from a kernel buffer to the socket

Parameters

kbuff	: data to be written
bytesWritten	: the amount of data actually written

Write data from a kernel buffer to the socket

Parameters

kbuff : data to be written

Returns: : the amount of data actually written

Definition at line 487 of file XrdClSocket.cc.

  {
    if( pTls ) return XRootDStatus( stError, errNotSupported, 0,
                                     "Cannot send a kernel-buffer over TLS." );
 
    ssize_t status = XrdSys::Send( pSocket, kbuff );
 
    if( status <= 0 )
      return ClassifyErrno( errno );
    bytesWritten += status;
    return XRootDStatus();
  }

References ClassifyErrno(), XrdCl::errNotSupported, pSocket, pTls, XrdSys::Send(), and XrdCl::stError.

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◆ SetChannelID()

void XrdCl::Socket::SetChannelID ( AnyObject * channelID )

inline

Set Channel ID (an object that allows to identify all sockets corresponding to the same channel)

Definition at line 246 of file XrdClSocket.hh.

      {
        pChannelID = channelID;
      }

References pChannelID.

Referenced by XrdCl::AsyncSocketHandler::AsyncSocketHandler().

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◆ SetFlags()

XRootDStatus XrdCl::Socket::SetFlags ( int flags )

Set the socket flags (man fcntl)

Definition at line 123 of file XrdClSocket.cc.

  {
    if( pSocket == -1 )
      return XRootDStatus( stError, errInvalidOp );
 
    int st = ::fcntl( pSocket, F_SETFL, flags );
    if( st == -1 )
      return XRootDStatus( stError, errSocketError, errno );
    return XRootDStatus();
  }

References XrdCl::errInvalidOp, XrdCl::errSocketError, fcntl(), pSocket, and XrdCl::stError.

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◆ SetSockOpt()

XRootDStatus XrdCl::Socket::SetSockOpt	(	int	level,
		int	optname,
		const void *	optval,
		socklen_t	optlen
	)

Set socket options.

Definition at line 167 of file XrdClSocket.cc.

  {
    if( pSocket == -1 )
      return XRootDStatus( stError, errInvalidOp );
 
    if( ::setsockopt( pSocket, level, optname, optval, optlen ) != 0 )
      return XRootDStatus( stError, errSocketOptError, errno );
 
    return XRootDStatus();
  }

References XrdCl::errInvalidOp, XrdCl::errSocketOptError, pSocket, and XrdCl::stError.

Referenced by XrdCl::AsyncSocketHandler::Connect(), and Initialize().

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◆ SetStatus()

void XrdCl::Socket::SetStatus ( SocketStatus status )

inline

Set socket status - do not use unless you know what you're doing.

Definition at line 133 of file XrdClSocket.hh.

      {
        pStatus = status;
      }

References pStatus.

Referenced by XrdCl::AsyncSocketHandler::Connect(), and XrdCl::AsyncSocketHandler::OnConnectionReturn().

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◆ TlsHandShake()

XRootDStatus XrdCl::Socket::TlsHandShake	(	AsyncSocketHandler *	socketHandler,
		const std::string &	thehost = `std::string()`
	)

Definition at line 844 of file XrdClSocket.cc.

  {
    try
    {
      if( !pServerAddr ) return XRootDStatus( stError, errInvalidOp );
      if( !pTls ) pTls.reset( new Tls( this, socketHandler ) );
      return pTls->Connect( thehost, pServerAddr.get() );
    }
    catch( std::exception& ex )
    {
      // the exception has been thrown when we tried to create
      // the TLS context
      return XRootDStatus( stFatal, errTlsError, 0, ex.what() );
    }
 
    return XRootDStatus();
  }

References XrdCl::errInvalidOp, XrdCl::errTlsError, pServerAddr, pTls, XrdCl::stError, and XrdCl::stFatal.

Referenced by XrdCl::AsyncSocketHandler::DoTlsHandShake().

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◆ Uncork()

XRootDStatus XrdCl::Socket::Uncork ( )

Definition at line 800 of file XrdClSocket.cc.

  {
#if defined(TCP_CORK) && !defined(__GNU__)
    // it's not defined on mac, we might want explore the possibility of using TCP_NOPUSH
    if( !pCorked ) return XRootDStatus();
 
    int state = 0;
    int rc = setsockopt( pSocket, IPPROTO_TCP, TCP_CORK, &state, sizeof( state ) );
    if( rc != 0 )
      return XRootDStatus( stFatal, errSocketOptError, errno );
#endif
    pCorked = false;
    return XRootDStatus();
  }

References XrdCl::errSocketOptError, IPPROTO_TCP, pCorked, pSocket, and XrdCl::stFatal.

Referenced by XrdCl::Tls::Connect(), Flash(), XrdCl::Tls::Read(), and XrdCl::Tls::Send().

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◆ WriteRaw()

XRootDStatus XrdCl::Socket::WriteRaw	(	void *	buffer,
		uint32_t	size,
		int32_t	timeout,
		uint32_t &	bytesWritten
	)

Write raw bytes to the socket

Parameters

buffer	data to be written
size	size of the data buffer
timeout	timeout value in seconds, -1 to wait indefinitely
bytesWritten	the amount of data actually written

Definition at line 375 of file XrdClSocket.cc.

  {
    //--------------------------------------------------------------------------
    // Check if we're connected
    //--------------------------------------------------------------------------
    if( pStatus != Connected )
      return XRootDStatus( stError, errInvalidOp );
 
    //--------------------------------------------------------------------------
    // Some useful variables
    //--------------------------------------------------------------------------
    bytesWritten = 0;
 
    char          *current    = (char *)buffer;
    bool           useTimeout = (timeout!=-1);
    time_t         now        = 0;
    time_t         newNow     = 0;
    XRootDStatus   sc;
 
    if( useTimeout )
      now = ::time(0);
 
    //--------------------------------------------------------------------------
    // Repeat the following until we have written everything
    //--------------------------------------------------------------------------
    while ( bytesWritten < size )
    {
      //------------------------------------------------------------------------
      // Check if we can read something
      //------------------------------------------------------------------------
      sc = Poll( false, true, useTimeout ? timeout : -1 );
 
      //------------------------------------------------------------------------
      // Let's write
      //------------------------------------------------------------------------
      if( sc.status == stOK )
      {
        ssize_t n = ::write( pSocket, current, (size-bytesWritten) );
 
        if( n > 0 )
        {
          bytesWritten += n;
          current   += n;
        }
 
        //----------------------------------------------------------------------
        // Error
        //----------------------------------------------------------------------
        if( (n <= 0) && (errno != EAGAIN) && (errno != EWOULDBLOCK) )
        {
          Close();
          return XRootDStatus( stError, errSocketError, errno );
        }
      }
      else
      {
        Close();
        return sc;
      }
 
      //------------------------------------------------------------------------
      // Do we still have time to wait for data?
      //------------------------------------------------------------------------
      if( useTimeout )
      {
        newNow    = ::time(0);
        timeout -= (newNow-now);
        now       = newNow;
        if( timeout < 0 )
          break;
      }
    }
 
    //--------------------------------------------------------------------------
    // Have we managed to read everything?
    //--------------------------------------------------------------------------
    if( bytesWritten < size )
      return XRootDStatus( stError, errSocketTimeout );
 
    return XRootDStatus( stOK );
  }

References Close(), Connected, XrdCl::errInvalidOp, XrdCl::errSocketError, XrdCl::errSocketTimeout, Poll(), pSocket, pStatus, XrdCl::Status::status, XrdCl::stError, XrdCl::stOK, and write.

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Member Data Documentation

◆ pChannelID

AnyObject* XrdCl::Socket::pChannelID

protected

Definition at line 334 of file XrdClSocket.hh.

Referenced by GetChannelID(), and SetChannelID().

◆ pCorked

bool XrdCl::Socket::pCorked

protected

Definition at line 335 of file XrdClSocket.hh.

Referenced by Cork(), IsCorked(), and Uncork().

◆ pName

std::string XrdCl::Socket::pName

mutableprotected

Definition at line 332 of file XrdClSocket.hh.

Referenced by Close(), and GetName().

◆ pPeerName

std::string XrdCl::Socket::pPeerName

mutableprotected

Definition at line 331 of file XrdClSocket.hh.

Referenced by Close(), and GetPeerName().

◆ pProtocolFamily

int XrdCl::Socket::pProtocolFamily

protected

Definition at line 333 of file XrdClSocket.hh.

Referenced by Connect(), and Initialize().

◆ pServerAddr

std::unique_ptr<XrdNetAddr> XrdCl::Socket::pServerAddr

protected

Definition at line 329 of file XrdClSocket.hh.

Referenced by ConnectToAddress(), GetServerAddress(), and TlsHandShake().

◆ pSocket

int XrdCl::Socket::pSocket

protected

Definition at line 327 of file XrdClSocket.hh.

Referenced by Close(), Connect(), ConnectToAddress(), Cork(), GetFD(), GetFlags(), GetPeerName(), GetSockName(), GetSockOpt(), Initialize(), Poll(), Read(), ReadRaw(), ReadV(), Send(), Send(), SetFlags(), SetSockOpt(), Uncork(), and WriteRaw().

◆ pSockName

std::string XrdCl::Socket::pSockName

mutableprotected

Definition at line 330 of file XrdClSocket.hh.

Referenced by Close(), and GetSockName().

◆ pStatus

SocketStatus XrdCl::Socket::pStatus

protected

Definition at line 328 of file XrdClSocket.hh.

Referenced by Close(), Connect(), ConnectToAddress(), GetName(), GetPeerName(), GetSockName(), GetStatus(), Poll(), ReadRaw(), SetStatus(), and WriteRaw().

◆ pTls

std::unique_ptr<Tls> XrdCl::Socket::pTls

protected

Definition at line 337 of file XrdClSocket.hh.

Referenced by Close(), ConnectToAddress(), IsEncrypted(), MapEvent(), Read(), ReadV(), Send(), Send(), and TlsHandShake().

The documentation for this class was generated from the following files:

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Enumeration Documentation

◆ SocketStatus

Constructor & Destructor Documentation

◆ Socket()

◆ ~Socket()

Member Function Documentation

◆ ClassifyErrno()

◆ Close()

◆ Connect()

◆ ConnectToAddress()

◆ Cork()

◆ Flash()

◆ GetChannelID()

◆ GetFD()

◆ GetFlags()

◆ GetName()

◆ GetPeerName()

◆ GetServerAddress()

◆ GetSockName()

◆ GetSockOpt()

◆ GetStatus()

◆ Initialize()

◆ IsCorked()

◆ IsEncrypted()

◆ MapEvent()

◆ Poll()

◆ Read()

◆ ReadRaw()

◆ ReadV()

◆ Send() [1/3]

◆ Send() [2/3]

◆ Send() [3/3]

◆ SetChannelID()

◆ SetFlags()

◆ SetSockOpt()

◆ SetStatus()

◆ TlsHandShake()

◆ Uncork()

◆ WriteRaw()

Member Data Documentation

◆ pChannelID

◆ pCorked

◆ pName

◆ pPeerName

◆ pProtocolFamily

◆ pServerAddr

◆ pSocket

◆ pSockName

◆ pStatus

◆ pTls