Add networkHost(s) types

lib.nix

@@ -70,4 +70,47 @@ in {
     getHostIpv6 getHostIps getDomainPostgresqlServer getSiteHosts getDomainHosts
     getSiteGatewayV4 getHostGatewayV4 getSiteGatewayV6 getHostGatewayV6
     getSiteV4PrefixLength getSiteV6PrefixLength;
+
+  fudo.types = with lib.types; rec {
+    networkHost = { name, ... }: {
+      hostname = mkOption {
+        type = str;
+        description = "Hostname";
+        default = name;
+      };
+
+      ipv4-address = mkOption {
+        type = nullOr str;
+        description = "The V4 IP of a given host, if any.";
+        default = null;
+      };
+
+      ipv6-address = mkOption {
+        type = nullOr str;
+        description = "The V6 IP of a given host, if any.";
+        default = null;
+      };
+
+      mac-address = mkOption {
+        type = nullOr str;
+        description =
+          "The MAC address of a given host, if desired for IP reservation.";
+        default = null;
+      };
+
+      description = mkOption {
+        type = nullOr str;
+        description = "Description of the host.";
+        default = null;
+      };
+
+      sshfp-records = mkOption {
+        type = listOf str;
+        description = "List of SSHFP records for this host.";
+        default = [ ];
+      };
+    };
+
+    networkHosts = attrsOf (submodule networkHost);
+  };
 }