From 7278996bf80f2712537f821fffc48fdec69d8478 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Wed, 4 Nov 2015 13:40:18 +0100
Subject: tinc rewrite

---
 custom/tinc/def.nix       | 39 +++++++++++++++++---------------
 custom/tinc/yggdrasil.nix | 57 +++++++++++++++++++++++++----------------------
 users/gkleen.nix          |  4 +++-
 ymir.nix                  | 12 ++++++----
 4 files changed, 62 insertions(+), 50 deletions(-)

diff --git a/custom/tinc/def.nix b/custom/tinc/def.nix
index e191168f..5412826b 100644
--- a/custom/tinc/def.nix
+++ b/custom/tinc/def.nix
@@ -70,6 +70,13 @@ in
             '';
           };
 
+          interfaceConfig = mkOption {
+            default = { };
+            description = ''
+              Additional configuration for the generated network interface
+            '';
+          };
+
           package = mkOption {
             default = pkgs.tinc_pre;
             description = ''
@@ -122,7 +129,7 @@ in
       ({
         virtual = true;
         virtualType = "${data.interfaceType}";
-      })
+      } // data.interfaceConfig)
     );
 
     systemd.services = flip mapAttrs' cfg.networks (network: data: nameValuePair
@@ -141,23 +148,19 @@ in
 				preStart = ''
           ${pkgs.openresolv}/bin/resolvconf -d tinc.${network} || true
         '';
-        # preStart = ''
-        #   mkdir -p /etc/tinc/${network}/hosts
-
-        #   # Determine how we should generate our keys
-        #   if type tinc >/dev/null 2>&1; then
-        #     # Tinc 1.1+ uses the tinc helper application for key generation
-
-        #     # Prefer ED25519 keys (only in 1.1+)
-        #     [ -f "/etc/tinc/${network}/ed25519_key.priv" ] || tinc -n ${network} generate-ed25519-keys
-
-        #     # Otherwise use RSA keys
-        #     [ -f "/etc/tinc/${network}/rsa_key.priv" ] || tinc -n ${network} generate-rsa-keys 4096
-        #   else
-        #     # Tinc 1.0 uses the tincd application
-        #     [ -f "/etc/tinc/${network}/rsa_key.priv" ] || tincd -n ${network} -K 4096
-        #   fi
-        # '';
+        preStart = ''
+          mkdir -p /etc/tinc/${network}/hosts
+
+          # Determine how we should generate our keys
+          if type tinc >/dev/null 2>&1; then
+            # Tinc 1.1+ uses the tinc helper application for key generation
+            [ -f "/etc/tinc/${network}/ed25519_key.priv" ] || tinc -n ${network} generate-ed25519-keys || \
+              [ -f "/etc/tinc/${network}/rsa_key.priv" ] || tinc -n ${network} generate-rsa-keys 4096
+          else
+            # Tinc 1.0 uses the tincd application
+            [ -f "/etc/tinc/${network}/rsa_key.priv" ] || tincd -n ${network} -K 4096
+          fi
+        '';
         script = ''
           tincd -D -U tinc.${network} -n ${network} --pidfile /run/tinc.${network}.pid -d ${toString data.debugLevel}
         '';
diff --git a/custom/tinc/yggdrasil.nix b/custom/tinc/yggdrasil.nix
index 4c19e0e7..a4309278 100644
--- a/custom/tinc/yggdrasil.nix
+++ b/custom/tinc/yggdrasil.nix
@@ -1,30 +1,33 @@
-{ config, pkgs, name, ip }:
+{ stdenv
+, nettools
+, openresolv
+, connect ? true
+, ipConf ? {}
+}
 
-{
-  config.services.tinc = {
-    networks = {
-      "yggdrasil" = {
-        name = name;
-				debugLevel = 2;
-				hosts = ( import ./yggdrasil-hosts.nix );
-				extraConfig = "ConnectTo = surtr";
-				scripts = {
-				  tinc-up = ''
-            #!${pkgs.stdenv.shell}
-            ${pkgs.nettools}/bin/route add -net 10.141.1.0 netmask 255.255.255.0 gw 10.141.1.1 dev $INTERFACE metric 9999
-            ${pkgs.openresolv}/bin/resolvconf -m 0 -a tinc.yggdrasil <<EOF
-            domain yggdrasil
-            nameserver 10.141.1.1
-            EOF'';
-					tinc-down = ''
-						#!${pkgs.stdenv.shell}
-            ${pkgs.openresolv}/bin/resolvconf -d tinc.yggdrasil'';
-				};
-			};
-		};
-	};
 
-	config.networking.interfaces."tinc.yggdrasil" = {
-    useDHCP = false;
-	} // ip;
+let
+  connectTo = if connect then "" else "ConnectTo = ymir"
+{
+  "yggdrasil" = {
+    name = name;
+    debugLevel = 2;
+    hosts = ( import ./yggdrasil-hosts.nix );
+    extraConfig = connectTo;
+    scripts = {
+      tinc-up = ''
+        #!${stdenv.shell}
+        ${nettools}/bin/route add -net 10.141.1.0 netmask 255.255.255.0 gw 10.141.1.1 dev $INTERFACE metric 9999
+        ${openresolv}/bin/resolvconf -m 0 -a tinc.yggdrasil <<EOF
+        domain yggdrasil
+        nameserver 10.141.1.1
+        EOF
+      '';
+      tinc-down = ''
+        #!${stdenv.shell}
+        ${openresolv}/bin/resolvconf -d tinc.yggdrasil
+      '';
+    };
+    interfaceConfig = ipConf;
+  };
 }
diff --git a/users/gkleen.nix b/users/gkleen.nix
index 5b5a104e..1d33f2cf 100644
--- a/users/gkleen.nix
+++ b/users/gkleen.nix
@@ -1,7 +1,9 @@
+{ pkgs, config, lib, ... }
+
 {
   name = "gkleen";
   description = "Gregor Kleen";
-  extraGroups = [ "wheel" "wlan" "lp" "dialout" "audio" ];
+  extraGroups = [ "wheel" "wlan" "lp" "dialout" "audio" ] + (if config.networking.hostname == "ymir" then ["xmpp"] else []);
   group = "users";
   uid = 1000;
   createHome = true;
diff --git a/ymir.nix b/ymir.nix
index 0ff8ddb4..7cc5ec25 100644
--- a/ymir.nix
+++ b/ymir.nix
@@ -19,6 +19,7 @@ in {
       ./ymir-hw.nix
       ./custom/zsh.nix
       ./users.nix
+      ./custom/tinc.nix
     ];
 
   boot.loader.grub = {
@@ -143,8 +144,11 @@ in {
     chown root:shadow /etc/shadow
     chmod 0640 /etc/shadow
   '';
-  users.groups."xmpp" = {
-    members = [ "gkleen"
-              ];
-  };
+
+  services.tinc.networks = (pkgs.callPackage ./custom/yggdrasil.nix {
+    connect = false;
+    ipConf = {
+      ip4 = [ { address = "10.141.4.1"; prefixLength = 16; } ];
+    };
+    });
 }
-- 
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