nixos/scion: init

nixos/modules/module-list.nix

@@ -1107,6 +1107,11 @@
   ./services/networking/rpcbind.nix
   ./services/networking/rxe.nix
   ./services/networking/sabnzbd.nix
+  ./services/networking/scion/scion.nix
+  ./services/networking/scion/scion-control.nix
+  ./services/networking/scion/scion-daemon.nix
+  ./services/networking/scion/scion-dispatcher.nix
+  ./services/networking/scion/scion-router.nix
   ./services/networking/seafile.nix
   ./services/networking/searx.nix
   ./services/networking/shadowsocks.nix

nixos/modules/services/networking/scion/scion-control.nix

@@ -0,0 +1,69 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.scion.scion-control;
+  toml = pkgs.formats.toml { };
+  defaultConfig = {
+    general = {
+      id = "cs";
+      config_dir = "/etc/scion";
+      reconnect_to_dispatcher = true;
+    };
+    beacon_db = {
+      connection = "/var/lib/scion-control/control.beacon.db";
+    };
+    path_db = {
+      connection = "/var/lib/scion-control/control.path.db";
+    };
+    trust_db = {
+      connection = "/var/lib/scion-control/control.trust.db";
+    };
+    log.console = {
+      level = "info";
+    };
+  };
+  configFile = toml.generate "scion-control.toml" (defaultConfig // cfg.settings);
+in
+{
+  options.services.scion.scion-control = {
+    enable = mkEnableOption (lib.mdDoc "the scion-control service");
+    settings = mkOption {
+      default = { };
+      type = toml.type;
+      example = literalExpression ''
+        {
+          path_db = {
+            connection = "/var/lib/scion-control/control.path.db";
+          };
+          log.console = {
+            level = "info";
+          };
+        }
+      '';
+      description = lib.mdDoc ''
+        scion-control configuration. Refer to
+        <https://docs.scion.org/en/latest/manuals/common.html>
+        for details on supported values.
+      '';
+    };
+  };
+  config = mkIf cfg.enable {
+    systemd.services.scion-control = {
+      description = "SCION Control Service";
+      after = [ "network-online.target" "scion-dispatcher.service" ];
+      wants = [ "network-online.target" "scion-dispatcher.service" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        Type = "simple";
+        Group = if (config.services.scion.scion-dispatcher.enable == true) then "scion" else null;
+        ExecStart = "${pkgs.scion}/bin/scion-control --config ${configFile}";
+        DynamicUser = true;
+        Restart = "on-failure";
+        BindPaths = [ "/dev/shm:/run/shm" ];
+        StateDirectory = "scion-control";
+      };
+    };
+  };
+}

nixos/modules/services/networking/scion/scion-daemon.nix

@@ -0,0 +1,64 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.scion.scion-daemon;
+  toml = pkgs.formats.toml { };
+  defaultConfig = {
+    general = {
+      id = "sd";
+      config_dir = "/etc/scion";
+      reconnect_to_dispatcher = true;
+    };
+    path_db = {
+      connection = "/var/lib/scion-daemon/sd.path.db";
+    };
+    trust_db = {
+      connection = "/var/lib/scion-daemon/sd.trust.db";
+    };
+    log.console = {
+      level = "info";
+    };
+  };
+  configFile = toml.generate "scion-daemon.toml" (defaultConfig // cfg.settings);
+in
+{
+  options.services.scion.scion-daemon = {
+    enable = mkEnableOption (lib.mdDoc "the scion-daemon service");
+    settings = mkOption {
+      default = { };
+      type = toml.type;
+      example = literalExpression ''
+        {
+          path_db = {
+            connection = "/var/lib/scion-daemon/sd.path.db";
+          };
+          log.console = {
+            level = "info";
+          };
+        }
+      '';
+      description = lib.mdDoc ''
+        scion-daemon configuration. Refer to
+        <https://docs.scion.org/en/latest/manuals/common.html>
+        for details on supported values.
+      '';
+    };
+  };
+  config = mkIf cfg.enable {
+    systemd.services.scion-daemon = {
+      description = "SCION Daemon";
+      after = [ "network-online.target" "scion-dispatcher.service" ];
+      wants = [ "network-online.target" "scion-dispatcher.service" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        Type = "simple";
+        ExecStart = "${pkgs.scion}/bin/scion-daemon --config ${configFile}";
+        Restart = "on-failure";
+        DynamicUser = true;
+        StateDirectory = "scion-daemon";
+      };
+    };
+  };
+}

nixos/modules/services/networking/scion/scion-dispatcher.nix

@@ -0,0 +1,74 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.scion.scion-dispatcher;
+  toml = pkgs.formats.toml { };
+  defaultConfig = {
+    dispatcher = {
+      id = "dispatcher";
+      socket_file_mode = "0770";
+      application_socket = "/dev/shm/dispatcher/default.sock";
+    };
+    log.console = {
+      level = "info";
+    };
+  };
+  configFile = toml.generate "scion-dispatcher.toml" (defaultConfig // cfg.settings);
+in
+{
+  options.services.scion.scion-dispatcher = {
+    enable = mkEnableOption (lib.mdDoc "the scion-dispatcher service");
+    settings = mkOption {
+      default = { };
+      type = toml.type;
+      example = literalExpression ''
+        {
+          dispatcher = {
+            id = "dispatcher";
+            socket_file_mode = "0770";
+            application_socket = "/dev/shm/dispatcher/default.sock";
+          };
+          log.console = {
+            level = "info";
+          };
+        }
+      '';
+      description = lib.mdDoc ''
+        scion-dispatcher configuration. Refer to
+        <https://docs.scion.org/en/latest/manuals/common.html>
+        for details on supported values.
+      '';
+    };
+  };
+  config = mkIf cfg.enable {
+    # Needed for group ownership of the dispatcher socket
+    users.groups.scion = {};
+
+    # scion programs hardcode path to dispatcher in /run/shm, and is not
+    # configurable at runtime upstream plans to obsolete the dispatcher in
+    # favor of an SCMP daemon, at which point this can be removed.
+    system.activationScripts.scion-dispatcher = ''
+      ln -sf /dev/shm /run/shm
+    '';
+
+    systemd.services.scion-dispatcher = {
+      description = "SCION Dispatcher";
+      after = [ "network-online.target" ];
+      wants = [ "network-online.target" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        Type = "simple";
+        Group = "scion";
+        DynamicUser = true;
+        BindPaths = [ "/dev/shm:/run/shm" ];
+        ExecStartPre = "${pkgs.coreutils}/bin/rm -rf /run/shm/dispatcher";
+        ExecStart = "${pkgs.scion}/bin/scion-dispatcher --config ${configFile}";
+        Restart = "on-failure";
+        StateDirectory = "scion-dispatcher";
+      };
+    };
+  };
+}
+

nixos/modules/services/networking/scion/scion-router.nix

@@ -0,0 +1,49 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.scion.scion-router;
+  toml = pkgs.formats.toml { };
+  defaultConfig = {
+    general = {
+      id = "br";
+      config_dir = "/etc/scion";
+    };
+  };
+  configFile = toml.generate "scion-router.toml" (defaultConfig // cfg.settings);
+in
+{
+  options.services.scion.scion-router = {
+    enable = mkEnableOption (lib.mdDoc "the scion-router service");
+    settings = mkOption {
+      default = { };
+      type = toml.type;
+      example = literalExpression ''
+        {
+          general.id = "br";
+        }
+      '';
+      description = lib.mdDoc ''
+        scion-router configuration. Refer to
+        <https://docs.scion.org/en/latest/manuals/common.html>
+        for details on supported values.
+      '';
+    };
+  };
+  config = mkIf cfg.enable {
+    systemd.services.scion-router = {
+      description = "SCION Router";
+      after = [ "network-online.target" ];
+      wants = [ "network-online.target" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        Type = "simple";
+        ExecStart = "${pkgs.scion}/bin/scion-router --config ${configFile}";
+        Restart = "on-failure";
+        DynamicUser = true;
+        StateDirectory = "scion-router";
+      };
+    };
+  };
+}

nixos/modules/services/networking/scion/scion.nix

@@ -0,0 +1,39 @@
+{ config, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.services.scion;
+in
+{
+  options.services.scion = {
+    enable = mkEnableOption (lib.mdDoc "all of the scion components and services");
+    bypassBootstrapWarning = mkOption {
+      type = types.bool;
+      default = false;
+      description = lib.mdDoc ''
+        bypass Nix warning about SCION PKI bootstrapping
+      '';
+    };
+  };
+  config = mkIf cfg.enable {
+    services.scion = {
+      scion-dispatcher.enable = true;
+      scion-daemon.enable = true;
+      scion-router.enable = true;
+      scion-control.enable = true;
+    };
+    assertions = [
+      { assertion = cfg.bypassBootstrapWarning == true;
+        message = ''
+          SCION is a routing protocol and requires bootstrapping with a manual, imperative key signing ceremony. You may want to join an existing Isolation Domain (ISD) such as scionlab.org, or bootstrap your own. If you have completed and configured the public key infrastructure for SCION and are sure this process is complete, then add the following to your configuration:
+
+          services.scion.bypassBootstrapWarning = true;
+
+          refer to docs.scion.org for more information
+        '';
+      }
+    ];
+  };
+}
+

nixos/tests/all-tests.nix

@@ -791,6 +791,7 @@ in {
   sanoid = handleTest ./sanoid.nix {};
   scaphandre = handleTest ./scaphandre.nix {};
   schleuder = handleTest ./schleuder.nix {};
+  scion-freestanding-deployment = handleTest ./scion/freestanding-deployment {};
   scrutiny = handleTest ./scrutiny.nix {};
   sddm = handleTest ./sddm.nix {};
   seafile = handleTest ./seafile.nix {};

nixos/tests/scion/freestanding-deployment/README.rst

@@ -0,0 +1,12 @@
+This NixOS VM test implements the network topology outlined in https://github.com/scionproto/scion/blob/27983125bccac6b84d1f96f406853aab0e460405/doc/tutorials/deploy.rst#sample-scion-demo-topology, below is an excerpt from that document
+
+Sample SCION Demo Topology
+..........................
+
+The topology of the ISD includes the inter-AS connections to neighboring ASes, and defines the underlay IP/UDP addresses of services and routers running in this AS. This is specified in topology files - this guide later explains how to configure these files. A following graphic depicts the topology on a high level.
+
+.. figure:: https://github.com/scionproto/scion/raw/27983125bccac6b84d1f96f406853aab0e460405/doc/tutorials/deploy/SCION-deployment-guide.drawio.png
+   :width: 95 %
+   :figwidth: 100 %
+
+   *Figure 1 - Topology of the sample SCION demo environment. It consists of 1 ISD, 3 core ASes and 2 non-core ASes.*

nixos/tests/scion/freestanding-deployment/default.nix

@@ -0,0 +1,172 @@
+# implements https://github.com/scionproto/scion/blob/27983125bccac6b84d1f96f406853aab0e460405/doc/tutorials/deploy.rst
+import ../../make-test-python.nix ({ pkgs, ... }:
+let
+  trust-root-configuration-keys = pkgs.runCommand "generate-trc-keys.sh" {
+    buildInputs = [
+      pkgs.scion
+    ];
+  } ''
+    set -euo pipefail
+
+    mkdir /tmp/tutorial-scion-certs && cd /tmp/tutorial-scion-certs
+    mkdir AS{1..5}
+
+    # Create voting and root keys and (self-signed) certificates for core ASes
+    pushd AS1
+    scion-pki certificate create --not-after=3650d --profile=sensitive-voting <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 sensitive voting cert"}') sensitive-voting.pem sensitive-voting.key
+    scion-pki certificate create --not-after=3650d --profile=regular-voting <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 regular voting cert"}') regular-voting.pem regular-voting.key
+    scion-pki certificate create --not-after=3650d --profile=cp-root <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 cp root cert"}') cp-root.pem cp-root.key
+    popd
+
+    pushd AS2
+    scion-pki certificate create --not-after=3650d --profile=cp-root <(echo '{"isd_as": "42-ffaa:1:2", "common_name": "42-ffaa:1:2 cp root cert"}') cp-root.pem cp-root.key
+    popd
+
+    pushd AS3
+    scion-pki certificate create --not-after=3650d --profile=sensitive-voting <(echo '{"isd_as": "42-ffaa:1:3", "common_name": "42-ffaa:1:3 sensitive voting cert"}') sensitive-voting.pem sensitive-voting.key
+    scion-pki certificate create --not-after=3650d --profile=regular-voting <(echo '{"isd_as": "42-ffaa:1:3", "common_name": "42-ffaa:1:3 regular voting cert"}') regular-voting.pem regular-voting.key
+    popd
+
+    # Create the TRC (Trust Root Configuration)
+    mkdir tmp
+    echo '
+    isd = 42
+    description = "Demo ISD 42"
+    serial_version = 1
+    base_version = 1
+    voting_quorum = 2
+
+    core_ases = ["ffaa:1:1", "ffaa:1:2", "ffaa:1:3"]
+    authoritative_ases = ["ffaa:1:1", "ffaa:1:2", "ffaa:1:3"]
+    cert_files = ["AS1/sensitive-voting.pem", "AS1/regular-voting.pem", "AS1/cp-root.pem", "AS2/cp-root.pem", "AS3/sensitive-voting.pem", "AS3/regular-voting.pem"]
+
+    [validity]
+    not_before = '$(date +%s)'
+    validity = "365d"' \
+    > trc-B1-S1-pld.tmpl
+
+    scion-pki trc payload --out=tmp/ISD42-B1-S1.pld.der --template trc-B1-S1-pld.tmpl
+    rm trc-B1-S1-pld.tmpl
+
+    # Sign and bundle the TRC
+    scion-pki trc sign tmp/ISD42-B1-S1.pld.der AS1/sensitive-voting.{pem,key} --out tmp/ISD42-B1-S1.AS1-sensitive.trc
+    scion-pki trc sign tmp/ISD42-B1-S1.pld.der AS1/regular-voting.{pem,key} --out tmp/ISD42-B1-S1.AS1-regular.trc
+    scion-pki trc sign tmp/ISD42-B1-S1.pld.der AS3/sensitive-voting.{pem,key} --out tmp/ISD42-B1-S1.AS3-sensitive.trc
+    scion-pki trc sign tmp/ISD42-B1-S1.pld.der AS3/regular-voting.{pem,key} --out tmp/ISD42-B1-S1.AS3-regular.trc
+
+    scion-pki trc combine tmp/ISD42-B1-S1.AS{1,3}-{sensitive,regular}.trc --payload tmp/ISD42-B1-S1.pld.der --out ISD42-B1-S1.trc
+    rm tmp -r
+
+    # Create CA key and certificate for issuing ASes
+    pushd AS1
+    scion-pki certificate create --profile=cp-ca <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 CA cert"}') cp-ca.pem cp-ca.key --ca cp-root.pem --ca-key cp-root.key
+    popd
+    pushd AS2
+    scion-pki certificate create --profile=cp-ca <(echo '{"isd_as": "42-ffaa:1:2", "common_name": "42-ffaa:1:2 CA cert"}') cp-ca.pem cp-ca.key --ca cp-root.pem --ca-key cp-root.key
+    popd
+
+    # Create AS key and certificate chains
+    scion-pki certificate create --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:1", "common_name": "42-ffaa:1:1 AS cert"}') AS1/cp-as.pem AS1/cp-as.key --ca AS1/cp-ca.pem --ca-key AS1/cp-ca.key --bundle
+    scion-pki certificate create --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:2", "common_name": "42-ffaa:1:2 AS cert"}') AS2/cp-as.pem AS2/cp-as.key --ca AS2/cp-ca.pem --ca-key AS2/cp-ca.key --bundle
+    scion-pki certificate create --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:3", "common_name": "42-ffaa:1:3 AS cert"}') AS3/cp-as.pem AS3/cp-as.key --ca AS1/cp-ca.pem --ca-key AS1/cp-ca.key --bundle
+    scion-pki certificate create --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:4", "common_name": "42-ffaa:1:4 AS cert"}') AS4/cp-as.pem AS4/cp-as.key --ca AS1/cp-ca.pem --ca-key AS1/cp-ca.key --bundle
+    scion-pki certificate create --profile=cp-as <(echo '{"isd_as": "42-ffaa:1:5", "common_name": "42-ffaa:1:5 AS cert"}') AS5/cp-as.pem AS5/cp-as.key --ca AS2/cp-ca.pem --ca-key AS2/cp-ca.key --bundle
+
+    for i in {1..5}
+    do
+      mkdir -p $out/AS$i
+      cp AS$i/cp-as.{key,pem} $out/AS$i
+    done
+
+    mv *.trc $out
+  '';
+  imports = hostId: [
+    ({
+      services.scion = {
+        enable = true;
+        bypassBootstrapWarning = true;
+      };
+      networking = {
+        useNetworkd = true;
+        useDHCP = false;
+      };
+      systemd.network.networks."01-eth1" = {
+        name = "eth1";
+        networkConfig.Address = "192.168.1.${toString hostId}/24";
+      };
+      environment.etc = {
+        "scion/topology.json".source = ./topology${toString hostId}.json;
+        "scion/crypto/as".source = trust-root-configuration-keys + "/AS${toString hostId}";
+        "scion/certs/ISD42-B1-S1.trc".source = trust-root-configuration-keys + "/ISD42-B1-S1.trc";
+        "scion/keys/master0.key".text = "U${toString hostId}v4k23ZXjGDwDofg/Eevw==";
+        "scion/keys/master1.key".text = "dBMko${toString hostId}qMS8DfrN/zP2OUdA==";
+      };
+      environment.systemPackages = [
+        pkgs.scion
+      ];
+    })
+  ];
+in
+{
+  name = "scion-test";
+  nodes = {
+    scion01 = { ... }: {
+      imports = (imports 1);
+    };
+    scion02 = { ... }: {
+      imports = (imports 2);
+    };
+    scion03 = { ... }: {
+      imports = (imports 3);
+    };
+    scion04 = { ... }: {
+      imports = (imports 4);
+    };
+    scion05 = { ... }: {
+      imports = (imports 5);
+    };
+  };
+  testScript = let
+    pingAll = pkgs.writeShellScript "ping-all-scion.sh" ''
+      addresses="42-ffaa:1:1 42-ffaa:1:2 42-ffaa:1:3 42-ffaa:1:4 42-ffaa:1:5"
+      timeout=100
+      wait_for_all() {
+        for as in "$@"
+        do
+          scion showpaths $as --no-probe > /dev/null
+          return 1
+        done
+        return 0
+      }
+      ping_all() {
+        for as in "$@"
+        do
+          scion ping "$as,127.0.0.1" -c 3
+        done
+        return 0
+      }
+      for i in $(seq 0 $timeout); do
+        wait_for_all $addresses && exit 0
+        ping_all $addresses && exit 0
+        sleep 1
+      done
+    '';
+  in
+  ''
+    # List of AS instances
+    machines = [scion01, scion02, scion03, scion04, scion05]
+
+    # Wait for scion-control.service on all instances
+    for i in machines:
+        i.wait_for_unit("scion-control.service")
+
+    # Execute pingAll command on all instances
+    for i in machines:
+        i.succeed("${pingAll} >&2")
+
+    # Restart scion-dispatcher and ping again to test robustness
+    for i in machines:
+        i.succeed("systemctl restart scion-dispatcher >&2")
+        i.succeed("${pingAll} >&2")
+  '';
+})

nixos/tests/scion/freestanding-deployment/topology1.json

@@ -0,0 +1,51 @@
+{
+  "attributes": [
+    "core"
+  ],
+  "isd_as": "42-ffaa:1:1",
+  "mtu": 1472,
+  "control_service": {
+    "cs": {
+      "addr": "127.0.0.1:31000"
+    }
+  },
+  "discovery_service": {
+    "cs": {
+      "addr": "127.0.0.1:31000"
+    }
+  },
+  "border_routers": {
+    "br": {
+      "internal_addr": "127.0.0.1:31002",
+      "interfaces": {
+        "1": {
+          "underlay": {
+            "public": "192.168.1.1:50014",
+            "remote": "192.168.1.4:50014"
+          },
+          "isd_as": "42-ffaa:1:4",
+          "link_to": "child",
+          "mtu": 1472
+        },
+        "2": {
+          "underlay": {
+            "public": "192.168.1.1:50012",
+            "remote": "192.168.1.2:50012"
+          },
+          "isd_as": "42-ffaa:1:2",
+          "link_to": "core",
+          "mtu": 1472
+        },
+        "3": {
+          "underlay": {
+            "public": "192.168.1.1:50013",
+            "remote": "192.168.1.3:50013"
+          },
+          "isd_as": "42-ffaa:1:3",
+          "link_to": "core",
+          "mtu": 1472
+        }
+      }
+    }
+  }
+}

nixos/tests/scion/freestanding-deployment/topology2.json

@@ -0,0 +1,51 @@
+{
+  "attributes": [
+    "core"
+  ],
+  "isd_as": "42-ffaa:1:2",
+  "mtu": 1472,
+  "control_service": {
+    "cs": {
+      "addr": "127.0.0.1:31000"
+    }
+  },
+  "discovery_service": {
+    "cs": {
+      "addr": "127.0.0.1:31000"
+    }
+  },
+  "border_routers": {
+    "br": {
+      "internal_addr": "127.0.0.1:31002",
+      "interfaces": {
+        "1": {
+          "underlay": {
+            "public": "192.168.1.2:50012",
+            "remote": "192.168.1.1:50012"
+          },
+          "isd_as": "42-ffaa:1:1",
+          "link_to": "core",
+          "mtu": 1472
+        },
+        "2": {
+          "underlay": {
+            "public": "192.168.1.2:50023",
+            "remote": "192.168.1.3:50023"
+          },
+          "isd_as": "42-ffaa:1:3",
+          "link_to": "core",
+          "mtu": 1472
+        },
+        "3": {
+          "underlay": {
+            "public": "192.168.1.2:50025",
+            "remote": "192.168.1.5:50025"
+          },
+          "isd_as": "42-ffaa:1:5",
+          "link_to": "child",
+          "mtu": 1472
+        }
+      }
+    }
+  }
+}

nixos/tests/scion/freestanding-deployment/topology3.json

@@ -0,0 +1,60 @@
+{
+  "attributes": [
+    "core"
+  ],
+  "isd_as": "42-ffaa:1:3",
+  "mtu": 1472,
+  "control_service": {
+    "cs": {
+      "addr": "127.0.0.1:31000"
+    }
+  },
+  "discovery_service": {
+    "cs": {
+      "addr": "127.0.0.1:31000"
+    }
+  },
+  "border_routers": {
+    "br": {
+      "internal_addr": "127.0.0.1:31002",
+      "interfaces": {
+        "1": {
+          "underlay": {
+            "public": "192.168.1.3:50013",
+            "remote": "192.168.1.1:50013"
+          },
+          "isd_as": "42-ffaa:1:1",
+          "link_to": "core",
+          "mtu": 1472
+        },
+        "2": {
+          "underlay": {
+            "public": "192.168.1.3:50023",
+            "remote": "192.168.1.2:50023"
+          },
+          "isd_as": "42-ffaa:1:2",
+          "link_to": "core",
+          "mtu": 1472
+        },
+        "3": {
+          "underlay": {
+            "public": "192.168.1.3:50034",
+            "remote": "192.168.1.4:50034"
+          },
+          "isd_as": "42-ffaa:1:4",
+          "link_to": "child",
+          "mtu": 1472
+        },
+        "4": {
+          "underlay": {
+            "public": "192.168.1.3:50035",
+            "remote": "192.168.1.5:50035"
+          },
+          "isd_as": "42-ffaa:1:5",
+          "link_to": "child",
+          "mtu": 1472
+        }
+      }
+    }
+  }
+}

nixos/tests/scion/freestanding-deployment/topology4.json

@@ -0,0 +1,40 @@
+{
+  "attributes": [],
+  "isd_as": "42-ffaa:1:4",
+  "mtu": 1472,
+  "control_service": {
+    "cs": {
+      "addr": "127.0.0.1:31000"
+    }
+  },
+  "discovery_service": {
+    "cs": {
+      "addr": "127.0.0.1:31000"
+    }
+  },
+  "border_routers": {
+    "br": {
+      "internal_addr": "127.0.0.1:31002",
+      "interfaces": {
+        "1": {
+          "underlay": {
+            "public": "192.168.1.4:50014",
+            "remote": "192.168.1.1:50014"
+          },
+          "isd_as": "42-ffaa:1:1",
+          "link_to": "parent",
+          "mtu": 1472
+        },
+        "2": {
+          "underlay": {
+            "public": "192.168.1.4:50034",
+            "remote": "192.168.1.3:50034"
+          },
+          "isd_as": "42-ffaa:1:3",
+          "link_to": "parent",
+          "mtu": 1472
+        }
+      }
+    }
+  }
+}

nixos/tests/scion/freestanding-deployment/topology5.json

@@ -0,0 +1,40 @@
+{
+  "attributes": [],
+  "isd_as": "42-ffaa:1:5",
+  "mtu": 1472,
+  "control_service": {
+    "cs": {
+      "addr": "127.0.0.1:31000"
+    }
+  },
+  "discovery_service": {
+    "cs": {
+      "addr": "127.0.0.1:31000"
+    }
+  },
+  "border_routers": {
+    "br": {
+      "internal_addr": "127.0.0.1:31002",
+      "interfaces": {
+        "1": {
+          "underlay": {
+            "public": "192.168.1.5:50025",
+            "remote": "192.168.1.2:50025"
+          },
+          "isd_as": "42-ffaa:1:2",
+          "link_to": "parent",
+          "mtu": 1472
+        },
+        "2": {
+          "underlay": {
+            "public": "192.168.1.5:50035",
+            "remote": "192.168.1.3:50035"
+          },
+          "isd_as": "42-ffaa:1:3",
+          "link_to": "parent",
+          "mtu": 1472
+        }
+      }
+    }
+  }
+}