pSOSystem System Calls - Read

setsockopt pNA+ System Calls
setsockopt Sets options on a socket.
#include
long setsockopt(
int s, /* socket descriptor */
int level, /* SOL_SOCKET, IPPROTO_TCP */
/* or IPPROTO_IP */
int optname, /* retrieval access */
char *optval,/* modification data */
int optlen /* sizeof modification data */
)
Description
Arguments
The setsockopt() system call sets options associated with the specified socket.
Socket level, IP protocol level, or TCP protocol level options can be set.
s Specifies the socket whose options are to be set.
level Specifies the level of the option to be set. Must be SOL_SOCKET for
socket level operations, IPPROTO_TCP for TCP protocol level operations,
or IPPROTO_IP for IP protocol level operations. These options
are defined in .
optname Specifies the option to be set and uses a symbolic constant defined
in . The symbolic constants available for each level
are described below.
optval Points to a buffer in which the option's value is specified. Most options
are 32-bit values. A nonzero value means the option should
be set, and a 0 means the option should be turned off.
optlen Specifies the size of the value pointed to by optval.
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