SO_BROADCAST

The state of the SO_BROADCAST socket option determines whether broadcast messages can be transmitted over a datagram socket. This socket option applies only to datagram sockets.

To set the state of this socket option, a WSK application calls the WskControlSocket function with the following parameters.

Parameter	Value
RequestType	WskSetOption
ControlCode	SO_BROADCAST
Level	SOL_SOCKET
InputSize	sizeof(ULONG)
InputBuffer	A pointer to a ULONG-typed variable that contains the value for the new state of the socket option: 0: Do not allow broadcast messages 1: Allow broadcast messages
OutputSize	0
OutputBuffer	NULL
OutputSizeReturned	NULL

To retrieve the state of this socket option, a WSK application calls the WskControlSocket function with the following parameters.

Parameter	Value
RequestType	WskGetOption
ControlCode	SO_BROADCAST
Level	SOL_SOCKET
InputSize	0
InputBuffer	NULL
OutputSize	sizeof(ULONG)
OutputBuffer	A pointer to a ULONG-typed variable that receives the value of the state of the socket option: 0: Broadcast messages are not allowed 1: Broadcast messages are allowed
OutputSizeReturned	NULL

A WSK application must specify a pointer to an IRP when calling the WskControlSocket function to set or retrieve the state of the SO_BROADCAST socket option.

The default state of this socket option is that broadcast messages are not allowed.

Requirements

Version	Available in Windows Vista and later versions of the Windows operating systems.
Header	Ws2def.h (include Wsk.h)