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# Copyright (c) 2018 GANDI SAS
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# Author: Emmanuel Hocdet <manu@gandi.net>
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$ABI strict
$Module proxy 3 "Varnish Module to extract TLV attributes from PROXYv2"

DESCRIPTION
===========

*vmod_proxy* contains functions to extract proxy-protocol-v2 TLV
attributes as described in
https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt.

$Function STRING alpn()

Extract ALPN attribute.

Example::

	set req.http.alpn = proxy.alpn();

$Restrict client

$Function STRING authority()

Extract authority attribute. This corresponds to SNI from a TLS
connection.

Example::

	set req.http.authority = proxy.authority();

$Restrict client

$Function BOOL is_ssl()

Report if proxy-protocol-v2 has SSL TLV.

Example::

	if (proxy.is_ssl()) {
		set req.http.ssl-version = proxy.ssl_version();
	}

$Restrict client

$Function BOOL client_has_cert_sess()

Report if the client provided a certificate at least once over the TLS
session this connection belongs to.

$Restrict client

$Function BOOL client_has_cert_conn()

Report if the client provided a certificate over the current
connection.

$Restrict client

$Function INT ssl_verify_result()

Report the SSL_get_verify_result from a TLS session. It only matters
if client_has_cert_sess() is true. Per default, value is set to 0
(X509_V_OK).

Example::

	if (proxy.client_has_cert_sess() && proxy.ssl_verify_result() == 0) {
		set req.http.ssl-verify = "ok";
	}

$Restrict client

$Function STRING ssl_version()

Extract SSL version attribute.

Example::

	set req.http.ssl-version = proxy.ssl_version();

$Restrict client

$Function STRING client_cert_cn()

Extract the common name attribute of the client certificate's.

Example::
	set req.http.cert-cn = proxy.client_cert_cn();

$Restrict client

$Function STRING ssl_cipher()

Extract the SSL cipher attribute.

Example::

	set req.http.ssl-cipher = proxy.ssl_cipher();

$Restrict client

$Function STRING cert_sign()

Extract the certificate signature algorithm attribute.

Example::

	set req.http.cert-sign = proxy.cert_sign();

$Restrict client

$Function STRING cert_key()

Extract the certificate key algorithm attribute.

Example::

	set req.http.cert-key = proxy.cert_key();

$Restrict client

SEE ALSO
========

* :ref:`varnishd(1)`
* :ref:`vsl(7)`