From d5fb41795f93127e6d20dac7ee532400e2d5a64d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Llu=C3=ADs=20Batlle=20i=20Rossell?=
 <viric@vicerveza.homeunix.net>
Date: Thu, 2 Dec 2010 20:23:45 +0000
Subject: [PATCH] Adding a wake on lan module.

svn path=/nixos/trunk/; revision=24958
---
 modules/config/power-management.nix        | 22 +++++++--
 modules/module-list.nix                    |  1 +
 modules/services/networking/wakeonlan.nix  | 56 ++++++++++++++++++++++
 modules/system/upstart-events/shutdown.nix |  4 +-
 4 files changed, 79 insertions(+), 4 deletions(-)
 create mode 100644 modules/services/networking/wakeonlan.nix

diff --git a/modules/config/power-management.nix b/modules/config/power-management.nix
index ce67285140e4..6baefa12791f 100644
--- a/modules/config/power-management.nix
+++ b/modules/config/power-management.nix
@@ -10,9 +10,14 @@ let
     ''
       #! ${pkgs.stdenv.shell}
       action="$1"
-      if [ "$action" = "resume" ]; then
-          ${cfg.resumeCommands}
-          ${cfg.powerUpCommands}
+      case "$action" in
+          hibernate|suspend)
+              ${cfg.powerDownCommands}
+              ;;
+          thaw|resume)
+              ${cfg.resumeCommands}
+              ${cfg.powerUpCommands}
+              ;;
       fi
     '';
 
@@ -50,6 +55,17 @@ in
             it resumes from suspend or hibernation.
           '';
       };
+
+      powerDownCommands = mkOption {
+        default = "";
+        example = "${pkgs.hdparm}/sbin/hdparm -B 255 /dev/sda";
+        description =
+          ''
+            Commands executed when the machine powers down.  That is,
+            they're executed both when the system shuts down and when
+            it goes to suspend or hibernation.
+          '';
+      };
       
     };
     
diff --git a/modules/module-list.nix b/modules/module-list.nix
index 8c927aa61429..0c7b9b6592f0 100644
--- a/modules/module-list.nix
+++ b/modules/module-list.nix
@@ -107,6 +107,7 @@
   ./services/networking/ssh/sshd.nix
   ./services/networking/tftpd.nix
   ./services/networking/vsftpd.nix
+  ./services/networking/wakeonlan.nix
   ./services/networking/wicd.nix
   ./services/networking/wpa_supplicant.nix
   ./services/networking/xinetd.nix
diff --git a/modules/services/networking/wakeonlan.nix b/modules/services/networking/wakeonlan.nix
new file mode 100644
index 000000000000..936936d29483
--- /dev/null
+++ b/modules/services/networking/wakeonlan.nix
@@ -0,0 +1,56 @@
+{ config, pkgs, ... }:
+
+with pkgs.lib;
+
+let
+  interfaces = config.services.wakeonlan.interfaces;
+
+  ethtool = "${pkgs.ethtool}/sbin/ethtool";
+
+  passwordParameter = password : if (password == "") then "" else
+    "sopass ${password}";
+
+  methodParameter = {method, password} :
+    if method == "magicpacket" then "wol g"
+    else if method == "password" then "wol s so ${passwordParameter password}"
+    else throw "Wake-On-Lan method not supported";
+    
+  line = { interface, method ? "magicpacket", password ? "" }: ''
+    ${ethtool} -s ${interface} ${methodParameter {inherit method password;}}
+  '';
+
+  concatStrings = fold (x: y: x + y) "";
+  lines = concatStrings (map (l: line l) interfaces);
+
+in
+{
+
+  ###### interface
+  
+  options = {
+
+    services.wakeonlan.interfaces = mkOption {
+      default = [ ];
+      example = [
+        {
+          interface = "eth0";
+          method = "password";
+          password = "00:11:22:33:44:55";
+        }
+      ];
+      description = ''
+        Interfaces where to enable Wake-On-LAN, and how. Two methods available:
+        "magickey" and "password". The password has the shape of six bytes
+        in hexadecimal separated by a colon each. For more information,
+        check the ethtool manual.
+      '';
+    };
+
+  };
+
+
+  ###### implementation
+
+  config.powerManagement.powerDownCommands = lines;
+
+}
diff --git a/modules/system/upstart-events/shutdown.nix b/modules/system/upstart-events/shutdown.nix
index 51b741d54e0a..85ad601914d8 100644
--- a/modules/system/upstart-events/shutdown.nix
+++ b/modules/system/upstart-events/shutdown.nix
@@ -29,9 +29,11 @@ with pkgs.lib;
               echo "<<< System shutdown >>>"
           fi
           echo ""
+
+          ${config.powerManagement.powerDownCommands}
       
           export PATH=${pkgs.utillinux}/bin:${pkgs.utillinux}/sbin:$PATH
-      
+
 
           # Do an initial sync just in case.
           sync