pSOSystem System Calls - Read

pNA+ System Calls setsockopt
Socket Level Options
level must be set to SOL_SOCKET for socket level operations and the optname
value can be one of the following (defined in ):
SO_BROADCAST Allows broadcast datagrams on a socket.
SO_DONTROUTE Indicates that the outgoing data should not be routed. Packets
directed at unconnected nodes are dropped.
SO_KEEPALIVE Maintains a connection by periodically transmitting a packet
over socket s.
SO_LINGER Controls the action taken when unsent messages are queued on a
socket and a close() is executed. If the socket is a stream
socket and SO_LINGER is set (l_onoff set to 1), the calling task
blocks until it is able to transmit the data or until a timeout occurs.
If SO_LINGER is disabled (l_onoff set to 0), the socket is
deleted immediately. SO_LINGER uses the linger structure,
which is defined in as follows:
struct linger {
int l_onoff; /* on/off option */
int l_linger; /* linger time in seconds */
}
This structure cannot be packed.
SO_OOBINLINE Requests that out-of-band data be placed in the normal data
input queue as it is received; it becomes accessible through
recv() calls without the MSG_OOB flag.
SO_RCVBUF Adjusts the normal allocated input buffer size. The buffer
size can be increased for high-volume connections or decreased
to limit the possible backlog of data. The pNA+ network
manager limits this value to 32 Kbytes.
SO_REUSEADDR Indicates that local addresses can be reused in a bind() call.
SO_REUSEPORT Indicates that local addresses can be reused in a bind()
call. For more information, see section 4.4.3 of the Network
Programming chapter in pSOSystem System Concepts.
SO_SNDBUF Adjusts the normal allocated output buffer size. The buffer
size can be increased for high-volume connections or decreased
to limit the possible backlog of data. The pNA+ network
manager limits this value to 32 Kbytes.
pSOSystem System Calls 4-67
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