Winsock API function Encyclopedia 3

The Windows Sockets API interface provided by this system (winking) is a function (routine) as defined in version 1.1 of WINSOCK (as appendix) published on January 20, 1993; includes 30 Berkeley Software Dis Tribution (BSD) function and 16 functions that conform to the Windows message-driven feature.

SetSockOpt (): Sets the state of the Socket.

Format: int PASCAL FAR setsockopt (SOCKET s,int level,int optname,const char FAR *optval,int);

Parameters: s Socket identification code, level option set level,optname option name, optval option set value, Optlen option set value length

Return value: Success-0

Failed-Socket_error (call WSAGetLastError () for reasons)

Description: This function is used to set some options for the Socket to change its action.

The options that can be changed are: (see Winsock version 1.1, page 54)

Value Type

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So_broadcast BOOL

*so_debug BOOL

So_dontlinger BOOL

*so_dontroute BOOL

*so_keepalive BOOL

So_linger struct Linger far*

So_oobinline BOOL

*so_rcvbuf int

SO_REUSEADDR BOOL

*so_sndbuf int

Tcp_nodelay BOOL

() shutdown (): Stop Socket receive/transmit function.

Format: int PASCAL FAR shutdown (SOCKET s, int how);

Parameter: The identifier of the S Socket, how do I represent the flag that should stop those actions

Return value: Success-0

Failed-Socket_error (call WSAGetLastError () for reasons)

Description: This function is used to stop the subsequent receipt or transfer of the Socket.

If you have a value of 0, you no longer receive data.

If the value of how is 1, the transfer of data is no longer allowed.