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.TH CURLOPT_H3 3 "27 Nov 2018" "libcurl 7.66.0" "curl_easy_setopt options"
.SH NAME
CURLOPT_H3 \- specify HTTP/3 protocol behavior
.SH SYNOPSIS
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_H3, long bitmask);
.SH EXPERIMENTAL
Warning: this feature is early code and is marked as experimental. It can only
be enabled by explicitly invoking configure with \fB--with-quiche\fP or
\fB--with-ngtcp2\fP. You are advised to not ship this feature used in
production before the experimental label is removed.
.SH DESCRIPTION
This function accepts a long \fIbitmask\fP with a set of flags set that
controls the HTTP/3 behavior for this transfer.
.SH DEFAULT
0
.SH PROTOCOLS
HTTPS
.SH EXAMPLE
.nf
CURL *curl = curl_easy_init();
if(curl) {
  CURLcode ret;
  curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
  curl_easy_setopt(curl, CURLOPT_H3, (long)0);
  ret = curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
Added in 7.66.0
.SH RETURN VALUE
Returns CURLE_OK if supported, an error otherwise.
.SH "SEE ALSO"
.BR CURLOPT_HTTP_VERSION "(3), "