From 6fb5459e8b3c2c3183372af72aea538fff60c5d3 Mon Sep 17 00:00:00 2001
From: Nathan Dehnel <ncdehnel@gmail.com>
Date: Tue, 21 Dec 2021 14:18:22 -0600
Subject: services: wireguard: Add DNS config field.

* gnu/services/vpn.scm (wireguard-configuration)[dns]: New field.
(wireguard-configuration-file): Honor it.
* doc/guix.texi: Document it.

Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>
---
 doc/guix.texi        |  3 +++
 gnu/services/vpn.scm | 13 +++++++++++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/doc/guix.texi b/doc/guix.texi
index 34e75156eb..d76cfb0c89 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -28632,6 +28632,9 @@ The IP addresses to be assigned to the above interface.
 @item @code{port} (default: @code{51820})
 The port on which to listen for incoming connections.
 
+@item @code{dns} (default: @code{#f})
+The DNS server(s) to announce to VPN clients via DHCP.
+
 @item @code{private-key} (default: @code{"/etc/wireguard/private.key"})
 The private key file for the interface.  It is automatically generated if
 the file does not exist.
diff --git a/gnu/services/vpn.scm b/gnu/services/vpn.scm
index 6004e41d8d..3e370ba4be 100644
--- a/gnu/services/vpn.scm
+++ b/gnu/services/vpn.scm
@@ -8,6 +8,7 @@
 ;;; Copyright © 2021 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2021 Raghav Gururajan <rg@raghavgururajan.name>
 ;;; Copyright © 2021 jgart <jgart@dismail.de>
+;;; Copyright © 2021 Nathan Dehnel <ncdehnel@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -67,6 +68,7 @@
             wireguard-configuration-interface
             wireguard-configuration-addresses
             wireguard-configuration-port
+            wireguard-configuration-dns
             wireguard-configuration-private-key
             wireguard-configuration-peers
 
@@ -715,7 +717,9 @@ strongSwan.")))
   (private-key        wireguard-configuration-private-key ;string
                       (default "/etc/wireguard/private.key"))
   (peers              wireguard-configuration-peers ;list of <wiregard-peer>
-                      (default '())))
+                      (default '()))
+  (dns                wireguard-configuration-dns ;list of strings
+                      (default #f)))
 
 (define (wireguard-configuration-file config)
   (define (peer->config peer)
@@ -739,7 +743,7 @@ AllowedIPs = ~a
                   "\n"))))
 
   (match-record config <wireguard-configuration>
-    (wireguard interface addresses port private-key peers)
+    (wireguard interface addresses port private-key peers dns)
     (let* ((config-file (string-append interface ".conf"))
            (peers (map peer->config peers))
            (config
@@ -755,6 +759,7 @@ AllowedIPs = ~a
 Address = ~a
 PostUp = ~a set %i private-key ~a
 ~a
+~a
 ~{~a~^~%~}"
                                #$(string-join addresses ",")
                                #$(file-append wireguard "/bin/wg")
@@ -762,6 +767,10 @@ PostUp = ~a set %i private-key ~a
                                #$(if port
                                      (format #f "ListenPort = ~a" port)
                                      "")
+                               #$(if dns
+                                     (format #f "DNS = ~a"
+                                             (string-join dns ","))
+                                     "")
                                (list #$@peers)))))))))
       (file-append config "/" config-file))))
 
-- 
cgit 1.4.1