From 7b8d19d10892eddd7cdaa1e9384185a0a6d64dae Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Fri, 31 Dec 2021 16:42:08 +0100
Subject: vidhar: prometheus: snmp: ...

---
 hosts/vidhar/network/dsl.nix | 217 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 217 insertions(+)
 create mode 100644 hosts/vidhar/network/dsl.nix

(limited to 'hosts/vidhar/network/dsl.nix')

diff --git a/hosts/vidhar/network/dsl.nix b/hosts/vidhar/network/dsl.nix
new file mode 100644
index 00000000..4f781422
--- /dev/null
+++ b/hosts/vidhar/network/dsl.nix
@@ -0,0 +1,217 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  pppInterface = config.networking.pppInterface;
+in {
+  options = {
+    networking.pppInterface = mkOption {
+      type = types.str;
+      default = "dsl";
+    };
+  };
+  
+  config = {
+    networking.vlans = {
+      telekom = {
+        id = 7;
+        interface = "eno2";
+      };
+    };
+    
+    services.pppd = {
+      enable = true;
+      peers.telekom.config = ''
+        nodefaultroute
+        ifname ${pppInterface}
+        lcp-echo-failure 1
+        lcp-echo-interval 1
+        maxfail 0
+        mtu 1492
+        mru 1492
+        plugin rp-pppoe.so
+        name telekom
+        user 002576900250551137425220#0001@t-online.de
+        telekom
+        debug
+      '';
+    };
+    systemd.services."pppd-telekom" = {
+      stopIfChanged = true;
+      
+      serviceConfig = lib.mkForce {
+        Type = "notify";
+        PIDFile = "/run/pppd/${pppInterface}.pid";
+        ExecStart = "${lib.getBin pkgs.ppp}/sbin/pppd call telekom up_sdnotify nolog +ipv6";
+        Restart = "always";
+        RestartSec = 5;
+
+        RuntimeDirectory = "pppd";
+        RuntimeDirectoryPreserve = true;
+      };
+    };
+    sops.secrets."pap-secrets" = {
+      format = "binary";
+      sopsFile = ./pap-secrets;
+      path = "/etc/ppp/pap-secrets";
+    };
+
+    environment.etc = {
+      "ppp/ip-up" = {
+        text = ''
+          #!${pkgs.runtimeShell}
+          ${pkgs.iproute}/bin/ip route add default via "$5" dev "${pppInterface}" metric 512
+        '';
+        mode = "0555";
+      };
+    };
+
+    systemd.network.networks.${pppInterface} = {
+      matchConfig = {
+        Name = pppInterface;
+      };
+      dns = [ "::1" "127.0.0.1" ];
+      domains = [ "~." ];
+      networkConfig = {
+        LinkLocalAddressing = "no";
+        DNSSEC = true;
+      };
+    };
+
+    services.corerad = {
+      enable = true;
+      settings = {
+        interfaces = [
+          { name = pppInterface;
+            monitor = true;
+            verbose = true;
+          }
+          { name = "lan";
+            advertise = true;
+            verbose = true;
+            prefix = [{ prefix = "::/64"; }];
+            route = [{ prefix = "::/0"; }];
+            rdnss = [{ servers = ["::"]; }];
+            dnssl = [{ domain_names = ["yggdrasil"]; }];
+          }
+        ];
+
+        debug = {
+          address = "localhost:9430";
+          prometheus = true;
+        };
+      };
+    };
+    services.ndppd = {
+      enable = true;
+      proxies = {
+        ${pppInterface} = {
+          router = true;
+          rules.lan = {
+            method = "iface";
+            interface = "lan";
+            network = "::/0";
+          };
+        };
+      };
+    };
+    boot.kernel.sysctl = {
+      "net.ipv6.conf.all.forwarding" = true;
+      "net.ipv6.conf.default.forwarding" = true;
+      "net.ipv4.conf.all.forwarding" = true;
+      "net.ipv4.conf.default.forwarding" = true;
+
+      "net.core.rmem_max" = "4194304";
+      "net.core.wmem_max" = "4194304";
+    };
+    systemd.services."pppd-telekom" = {
+      bindsTo = [ "sys-subsystem-net-devices-telekom.device" ];
+      after = [ "sys-subsystem-net-devices-telekom.device" ];
+    };
+    systemd.services."dhcpcd-${pppInterface}" = {
+      wantedBy = [ "multi-user.target" "network-online.target" "pppd-telekom.service" ];
+      bindsTo = [ "pppd-telekom.service" "sys-subsystem-net-devices-${pppInterface}.device" ];
+      after = [ "pppd-telekom.service" "sys-subsystem-net-devices-${pppInterface}.device" ];
+      wants = [ "network.target" ];
+      before = [ "network-online.target" ];
+
+      path = with pkgs; [ dhcpcd nettools openresolv ];
+      unitConfig.ConditionCapability = "CAP_NET_ADMIN";
+
+      stopIfChanged = true;
+
+      preStart = ''
+        i=0
+
+        while [[ -z "$(${pkgs.iproute2}/bin/ip -6 addr show dev ${pppInterface} scope link)" ]]; do
+          ${pkgs.coreutils}/bin/sleep 0.1
+          i=$((i + 1))
+          if [[ "$i" -ge 10 ]]; then
+            exit 1
+          fi
+        done
+      '';
+
+      serviceConfig = let
+        dhcpcdConf = pkgs.writeText "dhcpcd.conf" ''
+          duid
+          vendorclassid
+          ipv6only
+
+          nooption domain_name_servers, domain_name, domain_search
+          option classless_static_routes
+          option interface_mtu
+
+          option host_name
+          option rapid_commit
+          require dhcp_server_identifier
+          slaac private
+
+          nohook resolv.conf
+          ipv6ra_autoconf
+          iaid 1195061668
+          ipv6rs                 # enable routing solicitation for WAN adapter
+          ia_pd 1 lan/0/64/0     # request a PD and assign it to the LAN
+
+          reboot 0
+
+          waitip 6
+        '';
+      in {
+        Type = "forking";
+        PIDFile = "/var/run/dhcpcd/${pppInterface}.pid";
+        RuntimeDirectory = "dhcpcd";
+        ExecStart = "@${pkgs.dhcpcd}/sbin/dhcpcd dhcpcd -q --config ${dhcpcdConf} ${pppInterface}";
+        ExecReload = "${pkgs.dhcpcd}/sbin/dhcpcd --rebind ${pppInterface}";
+        Restart = "always";
+        RestartSec = "5";
+      };
+    };
+    systemd.services.ndppd = {
+      wantedBy = [ "dhcpcd-${pppInterface}.service" ];
+      bindsTo = [ "dhcpcd-${pppInterface}.service" ];
+      after = [ "dhcpcd-${pppInterface}.service" ];
+
+      serviceConfig = {
+        Restart = "always";
+        RestartSec = "5";
+      };
+    };
+    systemd.services.corerad = {
+      wantedBy = [ "dhcpcd-${pppInterface}.service" ];
+      bindsTo = [ "dhcpcd-${pppInterface}.service" ];
+      after = [ "dhcpcd-${pppInterface}.service" ];
+
+      serviceConfig = {
+        Restart = lib.mkForce "always";
+        RestartSec = "5";
+      };
+    };
+    users.users.dhcpcd = {
+      isSystemUser = true;
+      group = "dhcpcd";
+    };
+    users.groups.dhcpcd = {};
+  };
+}
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