so_broadcast example

Setting the SO_BROADCAST Option

The SO_BROADCAST option is a Boolean flag option, which is defined, fetched, and set with the int data type. The following example shows how to enable the SO_BROADCAST Option:

Example

#define TRUE 1

#define FALSE 0

int z;  /* Status code */

int s;  /* Socket s */

int so_broadcast;

. . .

so_broadcast = TRUE;

z = setsockopt(s,

               SOL_SOCKET,

               SO_BROADCAST,

               &so_broadcast,

               sizeof so_broadcast);

if ( z ) {

   perror("setsockopt(2)");

}

If the setsockopt(2) function returns zero, the socket s has been enabled to perform broadcasting. Note, however, that the socket type chosen must be one that is capable of broadcasting, such as a UDP socket.

See Also

SO_PASSCRED & SO_PEERCRED, SO_KEEPALIVE, SO_LINGER, SO_REUSEADD, SO_OBINLINE, SO_TYPE