#SHUTDOWN SOHO NOTES HOW TO#
#SHUTDOWN SOHO NOTES CODE#
#SHUTDOWN SOHO NOTES WINDOWS#

If an application wants to reuse a socket, then the DisconnectEx function should be called with the dwFlags parameter set to TF_REUSE_SOCKET to close a connection on a socket and prepare the socket handle to be reused.

#SHUTDOWN SOHO NOTES WINDOWS#

In particular, a Windows Sockets provider is not required to support the use ofĬonnect on a socket that has been shut down. Once the shutdown function is called to disable send, receive, or both, there is no method to re-enable send or receive for the existing socket connection.Īn application should not rely on being able to reuse a socket after it has been shut down. If SOCKET_ERROR is returned, then the graceful disconnect is not possible.įor more information, see the section on Graceful Shutdown, Linger Options, and Socket Closure. Recv or WSARecv until the function completes with success and indicates zero bytes were received. If SOCKET_ERROR is returned, then the graceful disconnect is not possible.Īnother method to wait for notification that the remote end has sent all its data and initiated a graceful disconnect uses overlapped receive calls follows : The recv or WSARecv until the function completes with success and indicates that zero bytes were received. WSAEventSelect to register for FD_CLOSE notification. One method to wait for notification that the remote end has sent all its data and initiated a graceful disconnect uses the WSAEventSelect function as follows : Shutdown to close connection before callingĬlosesocket. To assure that all data is sent and received on a connected socket before it is closed, an application should use Any resources attached to the socket will not be freed until Shutdown function does not close the socket.

#SHUTDOWN SOHO NOTES HOW TO#

Setting how to SD_BOTH disables both sends and receives as described above. For TCP sockets, a FIN will be sent after all data is sent and acknowledged by the receiver. If the how parameter is SD_SEND, subsequent calls to the In no case will an ICMP error packet be generated. For UDP sockets, incoming datagrams are accepted and queued. For TCP sockets, if there is still data queued on the socket waiting to be received, or data arrives subsequently, the connection is reset, since the data cannot be delivered to the user. This has no effect on the lower protocol layers. Recv function on the socket will be disallowed. If the how parameter is SD_RECEIVE, subsequent calls to the Shutdown function is used on all types of sockets to disable reception, transmission, or both. WSAStartup call must occur before using this function. This error applies only to a connection-oriented socket. For example, SD_SEND is used with a UNI_RECV socket type. The how parameter is not valid, or is not consistent with the socket type. The application should close the socket as it is no longer usable.Ī blocking Windows Sockets 1.1 call is in progress, or the service provider is still processing a callback function. The virtual circuit was reset by the remote side executing a hard or abortive close. The application should close the socket as it is no longer usable. The virtual circuit was terminated due to a time-out or other failure.

#SHUTDOWN SOHO NOTES CODE#

Otherwise, a value of SOCKET_ERROR is returned, and a specific error code can be retrieved by calling Shutdown both send and receive operations. Possible values for this flag are listed in the Winsock2.h header file. Syntax int shutdown(Ī flag that describes what types of operation will no longer be allowed. Shutdown function disables sends or receives on a socket.

Shutdown soho notes