[#BIO_set_tcp_ndelay]
= BIO_set_tcp_ndelay
:mrdocs:

Enable or disable TCP_NODELAY on a socket.

== Synopsis

Declared in `<openssl/bio.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
BIO_set_tcp_ndelay(
    int sock,
    int turn_on);
----

== Return Value

0 on success, or ‐1 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *sock*
| Socket file descriptor.
| *turn_on*
| Non‐zero to disable Nagle coalescing (TCP_NODELAY on), or 0 to clear it.
|===


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