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lastFile:machines/rigel/configuration.nix

machines/rigel/configuration.nix

@@ -1,4 +1,8 @@
-{ config, ... }:
+{
+  config,
+  self,
+  ...
+}:
 {
   imports = [
     (import ../../lib/auto-accept-zerotier-members.nix {
@@ -10,6 +14,8 @@
     })
   ];
 
+  nixpkgs.overlays = [ self.overlays.asteriskOverlay ];
+
   system.stateVersion = "25.11";
   clan.core.sops.defaultGroups = [ "admins" ];
   clan.core.networking.targetHost = "root@[${config.clan.core.vars.generators.zerotier.files.zerotier-ip.value}]";

modules/clan/phonebox/default.nix

@@ -31,6 +31,7 @@
           }:
           let
             user = "asterisk";
+            faxDir = "/run/asterisk/fax";
             rtpPortFrom = 10000;
             rtpPortTo = 20000;
             ata-interface = settings.ata-ethernet-iface;
@@ -240,6 +241,13 @@
                     syslog.local0 => notice,warning,error
                   '';
 
+                  "modules.conf" = ''
+                    [modules]
+                    autoload=yes
+
+                    load => res_fax_spandsp.so
+                  '';
+
                   # Dial plan config
                   "extensions.conf" =
                     let
@@ -257,6 +265,16 @@
                       same  =>     n,Playback(hello-world)
                       same  =>     n,Hangup()
 
+                      exten => 000,1,Answer()
+                      same => n,ReceiveFAX(${faxDir}/echo-''${UNIQUEID}.tiff)
+                      same => n,Set(FAXFILE=${faxDir}/echo-''${UNIQUEID}.tiff)
+                      same => n,Set(FAXECHO=true)
+
+                      exten => h,1,GotoIf($[''${FAXECHO}]?sendfax)
+                      same => n,Hangup()
+                      same => n(sendfax),Originate(PJSIP/00,app,SendFAX,${faxDir}/echo-''${UNIQUEID}.tiff)
+                      same => n,Set(FAXECHO=false)
+
                     ''
                     + (genLocalExtenConf {
                       localNumber = config.clan.core.vars.generators.phonebox.files.ata-local-number.value;
@@ -318,6 +336,10 @@
                 };
             };
 
+            systemd.tmpfiles.rules = [
+              "d ${faxDir}                            0755 ${user} ${user} - -"
+            ];
+
             systemd.services.asterisk-watcher = {
               enable = true;
               description = "Asterisk Configuration files watcher";

overlays/default.nix

@@ -2,5 +2,10 @@
 {
   flake.overlays = {
     packagesOverlay = import ../pkgs/overlay.nix;
+    asteriskOverlay = final: prev: {
+      asterisk = prev.asterisk.overrideAttrs (old: {
+        propagatedNativeBuildInputs = [ prev.pkgs.spandsp3 ];
+      });
+    };
   };
 }