AMX DESIGN XPRESS V 1.5 - PROGRAMMER GUIDE User's Guide download pdf (Page 216)

202

DAK

KwikNet TCP/IP Sockets

kn_getsockopt kn_getsockopt

Purpose Get a Particular Socket Option

Used by

n Task o ISP o Timer Procedure o Restart Procedure o Exit Procedure

Setup Prototype is in file KN_SOCK.H.

#include "KN_SOCK.H"

int kn_getsockopt(int s, int level, int optionid,

void *optionval, int *optionlen);

Description S is a socket descriptor identifying the socket for which the particular

socket information is desired.

Level is an identifier indicating the socket or protocol level for which

information is required. Use SOL_SOCKET for the highest, socket level

options. Use IPPROTO_TCP for TCP protocol level options. The Turbo

Treck TCP/IP Stack also supports the use of IPPROTO_IP for IP

protocol level options. Other protocol levels are not supported.

Optionid identifies the option of interest to the caller. The following

option identifiers can be used to determine the state of the option or to

retrieve its associated parameter. These options are described in

Chapter 5.3. Options marked > are non-standard KADAK extensions.

Only one option can be specified in each call. The Turbo Treck

TCP/IP Stack supports a number of additional socket, TCP and IP

options which are described in the Treck TCP/IP User Manual.

SO_REUSEADDR bool UDP TCP Local address reuse

SO_ACCEPTCONN bool TCP Check for listening socket

SO_KEEPALIVE bool TCP Keep connections alive

SO_BROADCAST bool UDP Permission to broadcast messages

SO_OOBINLINE bool TCP Allow out-of-band data in band

SO_LINGER struct TCP Linger on close if data present

SO_SNDBUF u/s long TCP Buffer size for send

SO_RCVBUF u/s long TCP Buffer size for receive

SO_SNDLOWAT u/s long TCP Buffer low limit for send

SO_RCVLOWAT u/s long TCP Buffer low limit for receive

SO_ERROR int UDP TCP Get and clear error on a socket

SO_NONBLOCK bool UDP TCP > Socket is non-blocking mode

TCP_NODELAY bool TCP Do not delay send to coalesce data

TCP_NOPUSH bool TCP Do not push last byte of data sent

TCP_MAXSEG int TCP Get maximum segment size (MSS)

...more

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AMX DESIGN XPRESS V 1.5 - PROGRAMMER GUIDE User's Guide Page 216