;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
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;;; GNU General Public License for more details.
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;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu services avahi)
  #:use-module (gnu services)
  #:use-module (gnu services base)
  #:use-module (gnu services shepherd)
  #:use-module (gnu services dbus)
  #:use-module (gnu system shadow)
  #:u</td></tr></table>
<table class='tabs'><tr><td>
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</form>
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   (service-type (name 'avahi)
                  (extensions
                   (list (service-extension shepherd-root-service-type
                                            avahi-shepherd-service)
                         (service-extension dbus-root-service-type
                                            avahi-package)
                         (service-extension account-service-type
                                            (const %avahi-accounts))
                         (service-extension activation-service-type
                                            (const %avahi-activation))
                         (service-extension nscd-service-type
                                            (const (list nss-mdns)))

                         ;; Provide 'avahi-browse', 'avahi-resolve', etc. in
                         ;; the system profile.
                         (service-extension profile-service-type
                                            avahi-package))))))

(define* (avahi-service #:key (avahi avahi) debug?
                        host-name
                        (publish? #t)
                        (ipv4? #t) (ipv6? #t)
                        wide-area?
                        (domains-to-browse '()))
  "Return a service that runs @command{avahi-daemon}, a system-wide
mDNS/DNS-SD responder that allows for service discovery and
\"zero-configuration\" host name lookups (see @uref{http://avahi.org/}), and
extends the name service cache daemon (nscd) so that it can resolve
@code{.local} host names using
@uref{http://0pointer.de/lennart/projects/nss-mdns/, nss-mdns}.  Additionally,
add the @var{avahi} package to the system profile so that commands such as
@command{avahi-browse} are directly usable.

If @var{host-name} is different from @code{#f}, use that as the host name to
publish for this machine; otherwise, use the machine's actual host name.

When @var{publish?} is true, publishing of host names and services is allowed;
in particular, avahi-daemon will publish the machine's host name and IP
address via mDNS on the local network.

When @var{wide-area?} is true, DNS-SD over unicast DNS is enabled.

Boolean values @var{ipv4?} and @var{ipv6?} determine whether to use IPv4/IPv6
sockets."
  (service avahi-service-type
           (avahi-configuration
            (avahi avahi) (debug? debug?) (host-name host-name)
            (publish? publish?) (ipv4? ipv4?) (ipv6? ipv6?)
            (wide-area? wide-area?)
            (domains-to-browse domains-to-browse))))

;;; avahi.scm ends here