.\" DO NOT MODIFY THIS FILE!  It was generated by gdoc.
.TH "gnutls_ext_register" 3 "3.8.5" "gnutls" "gnutls"
.SH NAME
gnutls_ext_register \- API function
.SH SYNOPSIS
.B #include <gnutls/gnutls.h>
.sp
.BI "int gnutls_ext_register(const char * " name ", int " id ", gnutls_ext_parse_type_t " parse_point ", gnutls_ext_recv_func " recv_func ", gnutls_ext_send_func " send_func ", gnutls_ext_deinit_data_func " deinit_func ", gnutls_ext_pack_func " pack_func ", gnutls_ext_unpack_func " unpack_func ");"
.SH ARGUMENTS
.IP "const char * name" 12
the name of the extension to register
.IP "int id" 12
the numeric TLS id of the extension
.IP "gnutls_ext_parse_type_t parse_point" 12
the parse type of the extension (see gnutls_ext_parse_type_t)
.IP "gnutls_ext_recv_func recv_func" 12
a function to receive the data
.IP "gnutls_ext_send_func send_func" 12
a function to send the data
.IP "gnutls_ext_deinit_data_func deinit_func" 12
a function deinitialize any private data
.IP "gnutls_ext_pack_func pack_func" 12
a function which serializes the extension's private data (used on session packing for resumption)
.IP "gnutls_ext_unpack_func unpack_func" 12
a function which will deserialize the extension's private data
.SH "DESCRIPTION"
This function will register a new extension type. The extension will remain
registered until \fBgnutls_global_deinit()\fP is called. If the extension type
is already registered then \fBGNUTLS_E_ALREADY_REGISTERED\fP will be returned.

Each registered extension can store temporary data into the gnutls_session_t
structure using \fBgnutls_ext_set_data()\fP, and they can be retrieved using
\fBgnutls_ext_get_data()\fP.

Any extensions registered with this function are valid for the client
and TLS1.2 server hello (or encrypted extensions for TLS1.3).

This function is not thread safe.
.SH "RETURNS"
\fBGNUTLS_E_SUCCESS\fP on success, otherwise a negative error code.
.SH "SINCE"
3.4.0
.SH "REPORTING BUGS"
Report bugs to <bugs@gnutls.org>.
.br
Home page: https://www.gnutls.org

.SH COPYRIGHT
Copyright \(co 2001-2023 Free Software Foundation, Inc., and others.
.br
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.
.SH "SEE ALSO"
The full documentation for
.B gnutls
is maintained as a Texinfo manual.
If the /usr/share/doc/gnutls/
directory does not contain the HTML form visit
.B
.IP https://www.gnutls.org/manual/
.PP