.files/nix/configurations/vanadium/nixos/connectivity.nix

{
  config,
  pkgs,
  lib,
  ...
}: {
  # For nautilius and iOS
  services.gvfs.enable = true;
  # iOS
  services.usbmuxd.enable = true;
  environment.systemPackages = with pkgs; [libimobiledevice idevicerestore];

  # https://unix.stackexchange.com/questions/592775/how-can-i-enable-apple-ios-fast-charge-support
  services.udev.extraRules = ''
    SUBSYSTEM=="usb", ACTION=="add", DRIVER=="apple-mfi-fastcharge", RUN+="/bin/sh -c 'echo Fast > /sys/class/power_supply/apple_mfi_fastcharge/charge_type'"
  '';

  users.users.root.openssh.authorizedKeys.keys = let
    ids = import ../../../identities.nix;
  in
    builtins.concatMap builtins.attrValues (builtins.attrValues ids);

  networking = {
    networkmanager.enable = lib.mkForce false;

    firewall.allowedTCPPorts = [
      8080

      # For 'localsend'
      # https://github.com/localsend/localsend?tab=readme-ov-file#setup
      53317
    ];

    # To enable roaming https://wiki.archlinux.org/title/Wpa_supplicant#Roaming
    wireless = {
      enable = true;
      userControlled.enable = true;
      secretsFile = config.age.secrets.wpa_password.path;
      scanOnLowSignal = false;
      networks = let
        # wpa_supplicant uses `strchr` to seek to the first `=`, so the only forbidden character is `=`.
        escapePwdKey = lib.replaceStrings ["="] ["_"];

        fromList = ns: let
          go = networkArgs @ {
            ssid,
            # Custom fields wrapping nixpkgs module options
            hasPassword ? false,
            scanOnLowSignal ? false,
            randomizeMac ? false,
            ...
          }: {
            ${ssid} = lib.mkMerge [
              (builtins.removeAttrs networkArgs ["ssid" "hasPassword" "scanOnLowSignal" "randomizeMac"])
              (lib.optionalAttrs hasPassword {
                pskRaw = "ext:${escapePwdKey ssid}";
              })
              (lib.optionalAttrs scanOnLowSignal {
                extraConfig = ''
                  bgscan="simple:30:-70:3600"
                '';
              })
              (lib.optionalAttrs randomizeMac {
                extraConfig = ''
                  mac_addr=1
                '';
              })
            ];
          };
        in
          lib.mkMerge (map go ns);
      in
        fromList (import ./connectivity/networks.nix);
    };
  };

  services.mullvad-vpn.enable = true;

  hardware.bluetooth.enable = true;

  #
  # Secure DNS
  #
  # https://nixos.wiki/wiki/Encrypted_DNS
  networking = {
    nameservers = ["127.0.0.1" "::1"];
    dhcpcd.extraConfig = "nohook resolv.conf";
    # networkmanager.dns = "none";
  };

  services.resolved.enable = false;

  services.dnscrypt-proxy2 = {
    enable = true;
    # Settings reference:
    # https://github.com/DNSCrypt/dnscrypt-proxy/blob/master/dnscrypt-proxy/example-dnscrypt-proxy.toml
    settings = {
      listen_addresses = ["127.0.0.1:53"];
      ipv4_servers = true;

      require_dnssec = true;
      require_nolog = true;
      require_nofilter = true;

      lb_strategy = "p2";
      lb_estimator = true;

      blocked_names = {
        # Blocklists are made of one pattern per line.
        # https://github.com/DNSCrypt/dnscrypt-proxy/blob/fa59f990431a49b6485f63f96601bc7e64017bf8/dnscrypt-proxy/example-dnscrypt-proxy.toml#L583C4-L583C75
        blocked_names_file = let
          sources = import ../../../../npins;

          # Prevent building up reliance on chatbots
          # Gotta preserve that thinking ability of my smoof bwain
          ai_list = lib.pipe (builtins.readFile "${sources.ai-blocklist}/noai_hosts.txt") [
            (lib.replaceStrings ["\r\n"] ["\n"]) # convert to unix ending just in case
            (lib.splitString "\n")
            (builtins.filter (x: ! (x == "" || lib.hasPrefix "#" x)))
            (builtins.map (x: builtins.elemAt (lib.splitString " " x) 1)) # remove 0.0.0.0
          ];

          hategroup_list = lib.pipe (builtins.readFile "${sources.hategroup-blocklist}/blocklist.txt") [
            (lib.replaceStrings ["\r\n"] ["\n"]) # convert to unix ending just in case
            (lib.splitString "\n")
            (builtins.filter (x: ! (x == "" || lib.hasPrefix "#" x)))
          ];

          combined_lists = ai_list ++ hategroup_list;
        in
          pkgs.writeText "dnsblocklist" (builtins.concatStringsSep "\n" combined_lists);
      };

      # Add this to test if dnscrypt-proxy is actually used to resolve DNS requests
      # query_log.file = "/var/log/dnscrypt-proxy/query.log";
      sources.public-resolvers = {
        urls = [
          "https://raw.githubusercontent.com/DNSCrypt/dnscrypt-resolvers/master/v3/public-resolvers.md"
          "https://download.dnscrypt.info/resolvers-list/v3/public-resolvers.md"
        ];
        cache_file = "/var/cache/dnscrypt-proxy/public-resolvers.md";
        minisign_key = "RWQf6LRCGA9i53mlYecO4IzT51TGPpvWucNSCh1CBM0QTaLn73Y7GFO3";
      };
    };
  };
}