### -*-m4-*-
###
### Virtual host support for distorted.org.uk Exim configuration
###
### (c) 2012 Mark Wooding
###

###----- Licensing notice ---------------------------------------------------
###
### This program is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 2 of the License, or
### (at your option) any later version.
###
### This program is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
### GNU General Public License for more details.
###
### You should have received a copy of the GNU General Public License
### along with this program; if not, write to the Free Software Foundation,
### Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

m4_define(<:VHOST:>,
	<:domains = ${if exists{CONF_sysconf_dir/domains.conf} \
			 {partial0-lsearch; CONF_sysconf_dir/domains.conf} \
			 {}}:>)
m4_define(<:VHOST_FILTER:>,
	<:FILTER_BASE
	VHOST
	condition = DOMKV($2, {true}{false})
	router_home_directory = DOMKV(home, {$value} fail)
	$1 = ${expand:DOMKV($2)}:>)
m4_define(<:VHOST_USER:>,
	<:user = DOMKV(owner, {$value}{CONF_filter_user})
	errors_to = DOMKV(errors_to, {$value} fail):>)

###--------------------------------------------------------------------------
### Routers and transports for virtual hosting.

SECTION(routers, route)m4_dnl
## If we're a front-end for some other domain, or we have special information
## about the domain, then pass stuff along as instructed.  The hack for the
## `transport' is very nasty; see the commentary for `smtp'.
virtual_route:
	driver = manualroute
	self = fail
	VHOST
	condition = DOMKV(route, {true}{false})
	route_data = <;DOMKV(route)
	same_domain_copy_routing = true
	transport = DOMKV(tls-min-dh-bits, {smtp_dhbits_$value}{smtp})
	no_more

SECTION(routers, virtual)m4_dnl
## Remap recipients according to the virtual host's instructions.  This must
## be done in two passes, so that we can identify the correct user's spam
## threshold during address verification.
FILTER_ROUTER(virtual_data,
	<:VHOST_FILTER(data, redirect):>,, <:
	VHOST_USER:>)
FILTER_ROUTER(virtual_file,
	<:VHOST_FILTER(file, filter):>,, <:
	VHOST_USER:>)

SECTION(routers, virtual-spam)m4_dnl
## If we're dealing with a virtual host, see if we have special spam-limit
## rules to apply.
SPAMLIMIT_ROUTER(virtual_spam_limit_lookup)
	VHOST
	condition = DOMKV(spam-limit-file, {true}{false})
	SPAMLIMIT_LOOKUP(DOMKV(spam-limit-file),
		$local_part, $domain, $sender_address)
SPAMLIMIT_ROUTER(virtual_spam_limit_userv)
	VHOST
	condition = DOMKV(spam-limit-userv, {true}{false})
	SPAMLIMIT_USERV(DOMKV(spam-limit-userv),
		$local_part, $domain, $sender_address)

SECTION(routers, virtual-tail)m4_dnl
## Last ditch effort for required local parts.  This is a bit strange because
## we should only try this for `final' domains -- where we're not going to
## route using the system-wide rules -- and we want the router to decline if
## the local part isn't one of our required set so that routing as a whole
## fails.
virtual_endstop:
	VHOST
	condition = DOMKV(final, {$value}{true})
	driver = redirect
	no_more
	data = ${if match_local_part{$local_part}{+required} \
		    {DOMKV(errors_to, \
			   {$value} \
			   {DOMKV(owner, \
				  {$value} \
				  {postmaster})})} \
		    {:unknown:}}

DIVERT(null)
###----- That's all, folks --------------------------------------------------