Migrate to snowfall lib

modules/nixos/system/network/base/default.nix

@@ -0,0 +1,9 @@
+{ config, ... }: {
+  networking = {
+    hostName = config.hostcfg.hostname;
+    useDHCP = true;
+    nameservers = [ "1.1.1.1" "9.9.9.9" ];
+
+    firewall = { enable = true; };
+  };
+}

modules/nixos/system/network/bluetooth/default.nix

@@ -0,0 +1,7 @@
+{ pkgs, ... }: {
+  hardware.bluetooth.enable = true;
+  hardware.brillo.enable = true;
+  services.blueman.enable = true;
+
+  environment.systemPackages = with pkgs; [ bluez bluez-tools ];
+}

modules/nixos/system/network/security/default.nix

@@ -0,0 +1,47 @@
+{ ... }: {
+  boot.kernel.sysctl = {
+    # The Magic SysRq key is a key combo that allows users connected to the
+    # system console of a Linux kernel to perform some low-level commands.
+    # Disable it, since we don't need it, and is a potential security concern.
+    "kernel.sysrq" = 0;
+
+    ## TCP hardening
+    # Prevent bogus ICMP errors from filling up logs.
+    "net.ipv4.icmp_ignore_bogus_error_responses" = 1;
+    # Reverse path filtering causes the kernel to do source validation of
+    # packets received from all interfaces. This can mitigate IP spoofing.
+    "net.ipv4.conf.default.rp_filter" = 1;
+    "net.ipv4.conf.all.rp_filter" = 1;
+    # Do not accept IP source route packets (we're not a router)
+    "net.ipv4.conf.all.accept_source_route" = 0;
+    "net.ipv6.conf.all.accept_source_route" = 0;
+    # Don't send ICMP redirects (again, we're on a router)
+    "net.ipv4.conf.all.send_redirects" = 0;
+    "net.ipv4.conf.default.send_redirects" = 0;
+    # Refuse ICMP redirects (MITM mitigations)
+    "net.ipv4.conf.all.accept_redirects" = 0;
+    "net.ipv4.conf.default.accept_redirects" = 0;
+    "net.ipv4.conf.all.secure_redirects" = 0;
+    "net.ipv4.conf.default.secure_redirects" = 0;
+    "net.ipv6.conf.all.accept_redirects" = 0;
+    "net.ipv6.conf.default.accept_redirects" = 0;
+    # Protects against SYN flood attacks
+    "net.ipv4.tcp_syncookies" = 1;
+    # Incomplete protection again TIME-WAIT assassination
+    "net.ipv4.tcp_rfc1337" = 1;
+
+    ## TCP optimization
+    # TCP Fast Open is a TCP extension that reduces network latency by packing
+    # data in the sender’s initial TCP SYN. Setting 3 = enable TCP Fast Open for
+    # both incoming and outgoing connections:
+    "net.ipv4.tcp_fastopen" = 3;
+    # Bufferbloat mitigations + slight improvement in throughput & latency
+    "net.ipv4.tcp_congestion_control" = "bbr";
+    "net.core.default_qdisc" = "cake";
+  };
+  boot.kernelModules = [ "tcp_bbr" ];
+
+  # So we don't have to do this later...
+  security.acme = { acceptTerms = true; };
+}
+

modules/nixos/system/network/wifi/default.nix

@@ -0,0 +1,38 @@
+{ lib, config, ... }:
+let cfg = config.hostcfg.net.wlp;
+in {
+  config = lib.mkIf cfg.enable {
+    networking.supplicant = {
+      "${cfg.nif}" = {
+        configFile.path = config.sops.secrets.wifi.path;
+        extraConf = ''
+          network={
+              ssid="test"
+              psk="12345678"
+          }
+          network={
+              ssid="WIFIonICE"
+          }
+          network={
+              ssid="JR-EAST_FREE_Wi-Fi"
+          }
+          network={
+              ssid="JR-WEST_FREE_Wi-Fi"
+          }
+          network={
+              ssid="tabinohotel"
+              psk="tabinohotel"
+          }
+          network={
+              ssid="comforthotel" 
+              psk="comforthotel"
+          }
+          network={
+              ssid="sotetsu-hotels" 
+              psk="sotetsux"
+          }
+        '';
+      };
+    };
+  };
+}

modules/nixos/system/network/wireguard/default.nix

@@ -0,0 +1,18 @@
+{ config, ... }: {
+  networking.wireguard = {
+    enable = true;
+    interfaces = {
+      wg0 = {
+        ips = [ config.hostcfg.net.wg.ip4 config.hostcfg.net.wg.ip6 ];
+        privateKeyFile = config.hostcfg.net.wg.pk;
+        listenPort = 1515;
+        peers = [{
+          allowedIPs = [ "10.10.1.0/24" "fd10:10:10::0/64" ];
+          endpoint = "vpn.helcel.net:1515";
+          publicKey = "NFBJvYXZC+bd62jhrKnM7/pugidWhgR6+C5qIiUiq3Q=";
+          persistentKeepalive = 30;
+        }];
+      };
+    };
+  };
+}