74 lines
2.6 KiB
Groff
74 lines
2.6 KiB
Groff
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.\" **************************************************************************
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.\" * _ _ ____ _
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.\" * Project ___| | | | _ \| |
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.\" * / __| | | | |_) | |
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.\" * | (__| |_| | _ <| |___
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.\" * \___|\___/|_| \_\_____|
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.\" *
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.\" * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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.\" *
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.\" * This software is licensed as described in the file COPYING, which
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.\" * you should have received as part of this distribution. The terms
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.\" * are also available at https://curl.se/docs/copyright.html.
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.\" *
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.\" * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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.\" * copies of the Software, and permit persons to whom the Software is
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.\" * furnished to do so, under the terms of the COPYING file.
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.\" *
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.\" * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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.\" * KIND, either express or implied.
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.\" *
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.\" * SPDX-License-Identifier: curl
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.\" *
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.\" **************************************************************************
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.\"
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.TH CURLOPT_TCP_NODELAY 3 "30 Jun 2016" libcurl libcurl
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.SH NAME
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CURLOPT_TCP_NODELAY \- the TCP_NODELAY option
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.SH SYNOPSIS
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.nf
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#include <curl/curl.h>
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CURLcode curl_easy_setopt(CURL *handle, CURLOPT_TCP_NODELAY, long nodelay);
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.fi
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.SH DESCRIPTION
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Pass a long specifying whether the \fITCP_NODELAY\fP option is to be set or
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cleared (1L = set, 0 = clear). The option is set by default. This has no
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effect after the connection has been established.
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Setting this option to 1L disables TCP's Nagle algorithm on connections
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created using this handle. The purpose of this algorithm is to try to minimize
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the number of small packets on the network (where "small packets" means TCP
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segments less than the Maximum Segment Size for the network).
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Maximizing the amount of data sent per TCP segment is good because it
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amortizes the overhead of the send. However, in some cases small segments may
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need to be sent without delay. This is less efficient than sending larger
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amounts of data at a time, and can contribute to congestion on the network if
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overdone.
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.SH DEFAULT
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1
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.SH PROTOCOLS
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All
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.SH EXAMPLE
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.nf
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int main(void)
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{
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CURL *curl = curl_easy_init();
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if(curl) {
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curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
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/* leave Nagle enabled */
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curl_easy_setopt(curl, CURLOPT_TCP_NODELAY, 0);
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curl_easy_perform(curl);
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}
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}
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.fi
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.SH AVAILABILITY
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Always. The default was changed to 1 from 0 in 7.50.2.
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.SH RETURN VALUE
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Returns CURLE_OK
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.SH "SEE ALSO"
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.BR CURLOPT_BUFFERSIZE (3),
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.BR CURLOPT_SOCKOPTFUNCTION (3),
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.BR CURLOPT_TCP_KEEPALIVE (3)
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