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.TH CURLOPT_SSL_ENABLE_NPN 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_SSL_ENABLE_NPN \- enable NPN
.SH SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_ENABLE_NPN, long npn);
.SH DESCRIPTION
Pass a long as parameter, 0 or 1 where 1 is for enable and 0 for disable. This
option enables/disables NPN in the SSL handshake (if the SSL backend libcurl
is built to use supports it), which can be used to negotiate http2.
.SH DEFAULT
1, enabled
.SH PROTOCOLS
HTTP
.SH EXAMPLE
TODO
.SH AVAILABILITY
Added in 7.36.0
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.\" Oracle has added the ARC stability level to this manual page
.SH ATTRIBUTES
See
.BR attributes (5)
for descriptions of the following attributes:
.sp
.TS
box;
cbp-1 | cbp-1
l | l .
ATTRIBUTE TYPE ATTRIBUTE VALUE
=
Availability web/curl
=
Stability Uncommitted
.TE
.PP
.SH "SEE ALSO"
.BR CURLOPT_SSL_ENABLE_ALPN "(3), " CURLOPT_SSL_OPTIONS "(3), "
.SH NOTES
.\" Oracle has added source availability information to this manual page
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Further information about this software can be found on the open source community website at http://curl.haxx.se/.