Properties

The context/connection properties for setting TCP input and output buffer sizes are CS_TCP_RCVBUF and CS_TCP_SNDBUF.

Client-Library properties for buffer size configuration
Property	Meaning	`*buffer` value	Level
CS_TCP_RCVBUF	Size of the input buffer for the client application	A positive integer	Context, connection
CS_TCP_SNDBUF	Size of the output buffer for the client application	A positive integer	Context, connection

Context example

ct_config(*context, CS_SET, CS_TCP_RCVBUF, &bufsize, CS_UNUSED, NULL);

ct_con_props(*connection, CS_SET, CS_TCP_RCVBUF, &bufsize, CS_UNUSED, NULL);

The server properties for setting TCP input and output buffer sizes are SRV_S_TCP_RCVBUF and SRV_S_TCP_SNDBUF.

Server properties for buffer size configuration
Property	SET/ CLEAR	GET	`bufp` when `cmd` is CS_SET	`bufp` when `cmd` is CS_GET
SRV_S_TCP_RCVBUF	Yes	Yes	A CS_INT	A CS_INT
SRV_S_TCP_SNDBUF	Yes	Yes	A CS_INT	A CS_INT

srv_props(cp, CS_SET, SRV_S_TCP_SNDBUF, bufp, CS_SIZEOF(CS_INT), (CS_INT *)NULL);

Set these parameters as appropriate for your application. For example, if the client is expected to be sending a large amount of data to the server, set CS_TCP_SNDBUF and SRV_S_TCP_RCVBUF to large values to increase the corresponding buffer sizes.
By default, the socket buffer size is set to the maximum allowable size for the operating system.