03-31-2009
HTTP doesn't keep connection all the time. Isn't it?
@Topic
You can implement a socket program the way you like. Why should anyone want to have connection all the time, even when client and server have no communication going on?
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LEARN ABOUT MOJAVE
shutdown
SHUTDOWN(2) BSD System Calls Manual SHUTDOWN(2)
NAME
shutdown -- shut down part of a full-duplex connection
SYNOPSIS
#include <sys/socket.h>
int
shutdown(int socket, int how);
DESCRIPTION
The shutdown() call causes all or part of a full-duplex connection on the socket associated with socket to be shut down. If how is SHUT_RD,
further receives will be disallowed. If how is SHUT_WR, further sends will be disallowed. If how is SHUT_RDWR, further sends and receives
will be disallowed.
RETURN VALUES
The shutdown() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indi-
cate the error.
ERRORS
The call succeeds unless:
[EBADF] Socket is not a valid descriptor.
[EINVAL] The how argument is invalid.
[ENOTCONN] The specified socket is not connected.
[ENOTSOCK] Socket is a file, not a socket.
SEE ALSO
connect(2), connectx(2), disconnectx(2), socket(2)
HISTORY
The shutdown() function call appeared in 4.2BSD.
4.2 Berkeley Distribution March 18, 2015 4.2 Berkeley Distribution