diff --git a/flake.nix b/flake.nix
index 0363238..929e62c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -6,177 +6,172 @@
     flake-utils.url = "github:numtide/flake-utils";
   };
 
-  outputs =
-    { self
-    , nixpkgs
-    , flake-utils
-    , ...
-    }:
-    let
-      headscaleVersion =
-        if (self ? shortRev)
-        then self.shortRev
-        else "dev";
-    in
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+    ...
+  }: let
+    headscaleVersion =
+      if (self ? shortRev)
+      then self.shortRev
+      else "dev";
+  in
     {
-      overlay = _: prev:
-        let
-          pkgs = nixpkgs.legacyPackages.${prev.system};
-        in
-        rec {
-          headscale = pkgs.buildGo120Module rec {
-            pname = "headscale";
-            version = headscaleVersion;
-            src = pkgs.lib.cleanSource self;
+      overlay = _: prev: let
+        pkgs = nixpkgs.legacyPackages.${prev.system};
+      in rec {
+        headscale = pkgs.buildGo120Module rec {
+          pname = "headscale";
+          version = headscaleVersion;
+          src = pkgs.lib.cleanSource self;
 
-            tags = [ "ts2019" ];
+          tags = ["ts2019"];
 
-            # Only run unit tests when testing a build
-            checkFlags = [ "-short" ];
+          # Only run unit tests when testing a build
+          checkFlags = ["-short"];
 
-            # When updating go.mod or go.sum, a new sha will need to be calculated,
-            # update this if you have a mismatch after doing a change to thos files.
-            vendorSha256 = "sha256-IOkbbFtE6+tNKnglE/8ZuNxhPSnloqM2sLgTvagMmnc=";
+          # When updating go.mod or go.sum, a new sha will need to be calculated,
+          # update this if you have a mismatch after doing a change to thos files.
+          vendorSha256 = "sha256-ui0V7a8bAAm5B7zfN9g2pWTyMpudtm10RgYWQwC6kcA=";
 
-            ldflags = [ "-s" "-w" "-X github.com/juanfont/headscale/cmd/headscale/cli.Version=v${version}" ];
-          };
-
-          golines = pkgs.buildGoModule rec {
-            pname = "golines";
-            version = "0.11.0";
-
-            src = pkgs.fetchFromGitHub {
-              owner = "segmentio";
-              repo = "golines";
-              rev = "v${version}";
-              sha256 = "sha256-2K9KAg8iSubiTbujyFGN3yggrL+EDyeUCs9OOta/19A=";
-            };
-
-            vendorSha256 = "sha256-rxYuzn4ezAxaeDhxd8qdOzt+CKYIh03A9zKNdzILq18=";
-
-            nativeBuildInputs = [ pkgs.installShellFiles ];
-          };
-
-          golangci-lint = prev.golangci-lint.override {
-            # Override https://github.com/NixOS/nixpkgs/pull/166801 which changed this
-            # to buildGo118Module because it does not build on Darwin.
-            inherit (prev) buildGoModule;
-          };
-
-          protoc-gen-grpc-gateway = pkgs.buildGoModule rec {
-            pname = "grpc-gateway";
-            version = "2.14.0";
-
-            src = pkgs.fetchFromGitHub {
-              owner = "grpc-ecosystem";
-              repo = "grpc-gateway";
-              rev = "v${version}";
-              sha256 = "sha256-lnNdsDCpeSHtl2lC1IhUw11t3cnGF+37qSM7HDvKLls=";
-            };
-
-            vendorSha256 = "sha256-dGdnDuRbwg8fU7uB5GaHEWa/zI3w06onqjturvooJQA=";
-
-            nativeBuildInputs = [ pkgs.installShellFiles ];
-
-            subPackages = [ "protoc-gen-grpc-gateway" "protoc-gen-openapiv2" ];
-          };
+          ldflags = ["-s" "-w" "-X github.com/juanfont/headscale/cmd/headscale/cli.Version=v${version}"];
         };
+
+        golines = pkgs.buildGoModule rec {
+          pname = "golines";
+          version = "0.11.0";
+
+          src = pkgs.fetchFromGitHub {
+            owner = "segmentio";
+            repo = "golines";
+            rev = "v${version}";
+            sha256 = "sha256-2K9KAg8iSubiTbujyFGN3yggrL+EDyeUCs9OOta/19A=";
+          };
+
+          vendorSha256 = "sha256-rxYuzn4ezAxaeDhxd8qdOzt+CKYIh03A9zKNdzILq18=";
+
+          nativeBuildInputs = [pkgs.installShellFiles];
+        };
+
+        golangci-lint = prev.golangci-lint.override {
+          # Override https://github.com/NixOS/nixpkgs/pull/166801 which changed this
+          # to buildGo118Module because it does not build on Darwin.
+          inherit (prev) buildGoModule;
+        };
+
+        protoc-gen-grpc-gateway = pkgs.buildGoModule rec {
+          pname = "grpc-gateway";
+          version = "2.14.0";
+
+          src = pkgs.fetchFromGitHub {
+            owner = "grpc-ecosystem";
+            repo = "grpc-gateway";
+            rev = "v${version}";
+            sha256 = "sha256-lnNdsDCpeSHtl2lC1IhUw11t3cnGF+37qSM7HDvKLls=";
+          };
+
+          vendorSha256 = "sha256-dGdnDuRbwg8fU7uB5GaHEWa/zI3w06onqjturvooJQA=";
+
+          nativeBuildInputs = [pkgs.installShellFiles];
+
+          subPackages = ["protoc-gen-grpc-gateway" "protoc-gen-openapiv2"];
+        };
+      };
     }
     // flake-utils.lib.eachDefaultSystem
-      (system:
-      let
-        pkgs = import nixpkgs {
-          overlays = [ self.overlay ];
-          inherit system;
-        };
-        buildDeps = with pkgs; [ git go_1_20 gnumake ];
-        devDeps = with pkgs;
-          buildDeps
-          ++ [
-            golangci-lint
-            golines
-            nodePackages.prettier
-            goreleaser
-            nfpm
-            gotestsum
-            gotests
+    (system: let
+      pkgs = import nixpkgs {
+        overlays = [self.overlay];
+        inherit system;
+      };
+      buildDeps = with pkgs; [git go_1_20 gnumake];
+      devDeps = with pkgs;
+        buildDeps
+        ++ [
+          golangci-lint
+          golines
+          nodePackages.prettier
+          goreleaser
+          nfpm
+          gotestsum
+          gotests
 
-            # 'dot' is needed for pprof graphs
-            # go tool pprof -http=: <source>
-            graphviz
+          # 'dot' is needed for pprof graphs
+          # go tool pprof -http=: <source>
+          graphviz
 
-            # Protobuf dependencies
-            protobuf
-            protoc-gen-go
-            protoc-gen-go-grpc
-            protoc-gen-grpc-gateway
-            buf
-            clang-tools # clang-format
-          ];
+          # Protobuf dependencies
+          protobuf
+          protoc-gen-go
+          protoc-gen-go-grpc
+          protoc-gen-grpc-gateway
+          buf
+          clang-tools # clang-format
+        ];
 
-        # Add entry to build a docker image with headscale
-        # caveat: only works on Linux
-        #
-        # Usage:
-        # nix build .#headscale-docker
-        # docker load < result
-        headscale-docker = pkgs.dockerTools.buildLayeredImage {
-          name = "headscale";
-          tag = headscaleVersion;
-          contents = [ pkgs.headscale ];
-          config.Entrypoint = [ (pkgs.headscale + "/bin/headscale") ];
-        };
-      in
-      rec {
-        # `nix develop`
-        devShell = pkgs.mkShell {
-          buildInputs = devDeps;
+      # Add entry to build a docker image with headscale
+      # caveat: only works on Linux
+      #
+      # Usage:
+      # nix build .#headscale-docker
+      # docker load < result
+      headscale-docker = pkgs.dockerTools.buildLayeredImage {
+        name = "headscale";
+        tag = headscaleVersion;
+        contents = [pkgs.headscale];
+        config.Entrypoint = [(pkgs.headscale + "/bin/headscale")];
+      };
+    in rec {
+      # `nix develop`
+      devShell = pkgs.mkShell {
+        buildInputs = devDeps;
 
-          shellHook = ''
-            export GOFLAGS=-tags="ts2019"
-            export PATH="$PWD/result/bin:$PATH"
+        shellHook = ''
+          export GOFLAGS=-tags="ts2019"
+          export PATH="$PWD/result/bin:$PATH"
 
-            mkdir -p ./ignored
-            export HEADSCALE_PRIVATE_KEY_PATH="./ignored/private.key"
-            export HEADSCALE_NOISE_PRIVATE_KEY_PATH="./ignored/noise_private.key"
-            export HEADSCALE_DB_PATH="./ignored/db.sqlite"
-            export HEADSCALE_TLS_LETSENCRYPT_CACHE_DIR="./ignored/cache"
-            export HEADSCALE_UNIX_SOCKET="./ignored/headscale.sock"
+          mkdir -p ./ignored
+          export HEADSCALE_PRIVATE_KEY_PATH="./ignored/private.key"
+          export HEADSCALE_NOISE_PRIVATE_KEY_PATH="./ignored/noise_private.key"
+          export HEADSCALE_DB_PATH="./ignored/db.sqlite"
+          export HEADSCALE_TLS_LETSENCRYPT_CACHE_DIR="./ignored/cache"
+          export HEADSCALE_UNIX_SOCKET="./ignored/headscale.sock"
+        '';
+      };
+
+      # `nix build`
+      packages = with pkgs; {
+        inherit headscale;
+        inherit headscale-docker;
+      };
+      defaultPackage = pkgs.headscale;
+
+      # `nix run`
+      apps.headscale = flake-utils.lib.mkApp {
+        drv = packages.headscale;
+      };
+      apps.default = apps.headscale;
+
+      checks = {
+        format =
+          pkgs.runCommand "check-format"
+          {
+            buildInputs = with pkgs; [
+              gnumake
+              nixpkgs-fmt
+              golangci-lint
+              nodePackages.prettier
+              golines
+              clang-tools
+            ];
+          } ''
+            ${pkgs.nixpkgs-fmt}/bin/nixpkgs-fmt ${./.}
+            ${pkgs.golangci-lint}/bin/golangci-lint run --fix --timeout 10m
+            ${pkgs.nodePackages.prettier}/bin/prettier --write '**/**.{ts,js,md,yaml,yml,sass,css,scss,html}'
+            ${pkgs.golines}/bin/golines --max-len=88 --base-formatter=gofumpt -w ${./.}
+            ${pkgs.clang-tools}/bin/clang-format -style="{BasedOnStyle: Google, IndentWidth: 4, AlignConsecutiveDeclarations: true, AlignConsecutiveAssignments: true, ColumnLimit: 0}" -i ${./.}
           '';
-        };
-
-        # `nix build`
-        packages = with pkgs; {
-          inherit headscale;
-          inherit headscale-docker;
-        };
-        defaultPackage = pkgs.headscale;
-
-        # `nix run`
-        apps.headscale = flake-utils.lib.mkApp {
-          drv = packages.headscale;
-        };
-        apps.default = apps.headscale;
-
-        checks = {
-          format =
-            pkgs.runCommand "check-format"
-              {
-                buildInputs = with pkgs; [
-                  gnumake
-                  nixpkgs-fmt
-                  golangci-lint
-                  nodePackages.prettier
-                  golines
-                  clang-tools
-                ];
-              } ''
-              ${pkgs.nixpkgs-fmt}/bin/nixpkgs-fmt ${./.}
-              ${pkgs.golangci-lint}/bin/golangci-lint run --fix --timeout 10m
-              ${pkgs.nodePackages.prettier}/bin/prettier --write '**/**.{ts,js,md,yaml,yml,sass,css,scss,html}'
-              ${pkgs.golines}/bin/golines --max-len=88 --base-formatter=gofumpt -w ${./.}
-              ${pkgs.clang-tools}/bin/clang-format -style="{BasedOnStyle: Google, IndentWidth: 4, AlignConsecutiveDeclarations: true, AlignConsecutiveAssignments: true, ColumnLimit: 0}" -i ${./.}
-            '';
-        };
-      });
+      };
+    });
 }
diff --git a/hscontrol/api_common.go b/hscontrol/api_common.go
deleted file mode 100644
index 4d40c1d..0000000
--- a/hscontrol/api_common.go
+++ /dev/null
@@ -1,115 +0,0 @@
-package hscontrol
-
-import (
-	"time"
-
-	"github.com/juanfont/headscale/hscontrol/types"
-	"github.com/juanfont/headscale/hscontrol/util"
-	"github.com/rs/zerolog/log"
-	"tailscale.com/tailcfg"
-)
-
-func (h *Headscale) generateMapResponse(
-	mapRequest tailcfg.MapRequest,
-	machine *types.Machine,
-) (*tailcfg.MapResponse, error) {
-	log.Trace().
-		Str("func", "generateMapResponse").
-		Str("machine", mapRequest.Hostinfo.Hostname).
-		Msg("Creating Map response")
-	node, err := h.db.TailNode(*machine, h.ACLPolicy, h.cfg.DNSConfig)
-	if err != nil {
-		log.Error().
-			Caller().
-			Str("func", "generateMapResponse").
-			Err(err).
-			Msg("Cannot convert to node")
-
-		return nil, err
-	}
-
-	peers, err := h.db.GetValidPeers(h.aclRules, machine)
-	if err != nil {
-		log.Error().
-			Caller().
-			Str("func", "generateMapResponse").
-			Err(err).
-			Msg("Cannot fetch peers")
-
-		return nil, err
-	}
-
-	profiles := h.db.GetMapResponseUserProfiles(*machine, peers)
-
-	nodePeers, err := h.db.TailNodes(peers, h.ACLPolicy, h.cfg.DNSConfig)
-	if err != nil {
-		log.Error().
-			Caller().
-			Str("func", "generateMapResponse").
-			Err(err).
-			Msg("Failed to convert peers to Tailscale nodes")
-
-		return nil, err
-	}
-
-	dnsConfig := getMapResponseDNSConfig(
-		h.cfg.DNSConfig,
-		h.cfg.BaseDomain,
-		*machine,
-		peers,
-	)
-
-	now := time.Now()
-
-	resp := tailcfg.MapResponse{
-		KeepAlive: false,
-		Node:      node,
-
-		// TODO: Only send if updated
-		DERPMap: h.DERPMap,
-
-		// TODO: Only send if updated
-		Peers: nodePeers,
-
-		// TODO(kradalby): Implement:
-		// https://github.com/tailscale/tailscale/blob/main/tailcfg/tailcfg.go#L1351-L1374
-		// PeersChanged
-		// PeersRemoved
-		// PeersChangedPatch
-		// PeerSeenChange
-		// OnlineChange
-
-		// TODO: Only send if updated
-		DNSConfig: dnsConfig,
-
-		// TODO: Only send if updated
-		Domain: h.cfg.BaseDomain,
-
-		// Do not instruct clients to collect services, we do not
-		// support or do anything with them
-		CollectServices: "false",
-
-		// TODO: Only send if updated
-		PacketFilter: h.aclRules,
-
-		UserProfiles: profiles,
-
-		// TODO: Only send if updated
-		SSHPolicy: h.sshPolicy,
-
-		ControlTime: &now,
-
-		Debug: &tailcfg.Debug{
-			DisableLogTail:      !h.cfg.LogTail.Enabled,
-			RandomizeClientPort: h.cfg.RandomizeClientPort,
-		},
-	}
-
-	log.Trace().
-		Str("func", "generateMapResponse").
-		Str("machine", mapRequest.Hostinfo.Hostname).
-		// Interface("payload", resp).
-		Msgf("Generated map response: %s", util.TailMapResponseToString(resp))
-
-	return &resp, nil
-}
diff --git a/hscontrol/app.go b/hscontrol/app.go
index bb68ced..0588037 100644
--- a/hscontrol/app.go
+++ b/hscontrol/app.go
@@ -80,7 +80,7 @@ type Headscale struct {
 	dbString        string
 	dbType          string
 	dbDebug         bool
-	privateKey      *key.MachinePrivate
+	privateKey2019  *key.MachinePrivate
 	noisePrivateKey *key.MachinePrivate
 
 	DERPMap    *tailcfg.DERPMap
@@ -166,7 +166,7 @@ func NewHeadscale(cfg *Config) (*Headscale, error) {
 		cfg:                cfg,
 		dbType:             cfg.DBtype,
 		dbString:           dbString,
-		privateKey:         privateKey,
+		privateKey2019:     privateKey,
 		noisePrivateKey:    noisePrivateKey,
 		aclRules:           tailcfg.FilterAllowAll, // default allowall
 		registrationCache:  registrationCache,
diff --git a/hscontrol/db/machine.go b/hscontrol/db/machine.go
index a8d3569..9bfe581 100644
--- a/hscontrol/db/machine.go
+++ b/hscontrol/db/machine.go
@@ -39,15 +39,7 @@ var (
 	)
 )
 
-// filterMachinesByACL wrapper function to not have devs pass around locks and maps
-// related to the application outside of tests.
-func (hsdb *HSDatabase) filterMachinesByACL(
-	aclRules []tailcfg.FilterRule,
-	currentMachine *types.Machine, peers types.Machines,
-) types.Machines {
-	return policy.FilterMachinesByACL(currentMachine, peers, aclRules)
-}
-
+// ListPeers returns all peers of machine, regardless of any Policy.
 func (hsdb *HSDatabase) ListPeers(machine *types.Machine) (types.Machines, error) {
 	log.Trace().
 		Caller().
@@ -72,67 +64,6 @@ func (hsdb *HSDatabase) ListPeers(machine *types.Machine) (types.Machines, error
 	return machines, nil
 }
 
-func (hsdb *HSDatabase) getPeers(
-	aclRules []tailcfg.FilterRule,
-	machine *types.Machine,
-) (types.Machines, error) {
-	var peers types.Machines
-	var err error
-
-	// If ACLs rules are defined, filter visible host list with the ACLs
-	// else use the classic user scope
-	if len(aclRules) > 0 {
-		var machines []types.Machine
-		machines, err = hsdb.ListMachines()
-		if err != nil {
-			log.Error().Err(err).Msg("Error retrieving list of machines")
-
-			return types.Machines{}, err
-		}
-		peers = hsdb.filterMachinesByACL(aclRules, machine, machines)
-	} else {
-		peers, err = hsdb.ListPeers(machine)
-		if err != nil {
-			log.Error().
-				Caller().
-				Err(err).
-				Msg("Cannot fetch peers")
-
-			return types.Machines{}, err
-		}
-	}
-
-	sort.Slice(peers, func(i, j int) bool { return peers[i].ID < peers[j].ID })
-
-	log.Trace().
-		Caller().
-		Str("self", machine.Hostname).
-		Str("peers", peers.String()).
-		Msg("Peers returned to caller")
-
-	return peers, nil
-}
-
-func (hsdb *HSDatabase) GetValidPeers(
-	aclRules []tailcfg.FilterRule,
-	machine *types.Machine,
-) (types.Machines, error) {
-	validPeers := make(types.Machines, 0)
-
-	peers, err := hsdb.getPeers(aclRules, machine)
-	if err != nil {
-		return types.Machines{}, err
-	}
-
-	for _, peer := range peers {
-		if !peer.IsExpired() {
-			validPeers = append(validPeers, peer)
-		}
-	}
-
-	return validPeers, nil
-}
-
 func (hsdb *HSDatabase) ListMachines() ([]types.Machine, error) {
 	machines := []types.Machine{}
 	if err := hsdb.db.Preload("AuthKey").Preload("AuthKey.User").Preload("User").Find(&machines).Error; err != nil {
diff --git a/hscontrol/db/machine_test.go b/hscontrol/db/machine_test.go
index f34f64d..7ca96d5 100644
--- a/hscontrol/db/machine_test.go
+++ b/hscontrol/db/machine_test.go
@@ -293,8 +293,8 @@ func (s *Suite) TestGetACLFilteredPeers(c *check.C) {
 	aclRules, _, err := policy.GenerateFilterRules(aclPolicy, machines, false)
 	c.Assert(err, check.IsNil)
 
-	peersOfTestMachine := db.filterMachinesByACL(aclRules, testMachine, machines)
-	peersOfAdminMachine := db.filterMachinesByACL(aclRules, adminMachine, machines)
+	peersOfTestMachine := policy.FilterMachinesByACL(testMachine, machines, aclRules)
+	peersOfAdminMachine := policy.FilterMachinesByACL(adminMachine, machines, aclRules)
 
 	c.Log(peersOfTestMachine)
 	c.Assert(len(peersOfTestMachine), check.Equals, 9)
diff --git a/hscontrol/db/users.go b/hscontrol/db/users.go
index e0ffd19..ce18675 100644
--- a/hscontrol/db/users.go
+++ b/hscontrol/db/users.go
@@ -2,13 +2,11 @@ package db
 
 import (
 	"errors"
-	"fmt"
 
 	"github.com/juanfont/headscale/hscontrol/types"
 	"github.com/juanfont/headscale/hscontrol/util"
 	"github.com/rs/zerolog/log"
 	"gorm.io/gorm"
-	"tailscale.com/tailcfg"
 )
 
 var (
@@ -163,32 +161,3 @@ func (hsdb *HSDatabase) SetMachineUser(machine *types.Machine, username string)
 
 	return nil
 }
-
-func (hsdb *HSDatabase) GetMapResponseUserProfiles(
-	machine types.Machine,
-	peers types.Machines,
-) []tailcfg.UserProfile {
-	userMap := make(map[string]types.User)
-	userMap[machine.User.Name] = machine.User
-	for _, peer := range peers {
-		userMap[peer.User.Name] = peer.User // not worth checking if already is there
-	}
-
-	profiles := []tailcfg.UserProfile{}
-	for _, user := range userMap {
-		displayName := user.Name
-
-		if hsdb.baseDomain != "" {
-			displayName = fmt.Sprintf("%s@%s", user.Name, hsdb.baseDomain)
-		}
-
-		profiles = append(profiles,
-			tailcfg.UserProfile{
-				ID:          tailcfg.UserID(user.ID),
-				LoginName:   user.Name,
-				DisplayName: displayName,
-			})
-	}
-
-	return profiles
-}
diff --git a/hscontrol/db/users_test.go b/hscontrol/db/users_test.go
index 02c0a2a..bc468b2 100644
--- a/hscontrol/db/users_test.go
+++ b/hscontrol/db/users_test.go
@@ -1,13 +1,10 @@
 package db
 
 import (
-	"net/netip"
-
 	"github.com/juanfont/headscale/hscontrol/types"
 	"github.com/juanfont/headscale/hscontrol/util"
 	"gopkg.in/check.v1"
 	"gorm.io/gorm"
-	"tailscale.com/tailcfg"
 )
 
 func (s *Suite) TestCreateAndDestroyUser(c *check.C) {
@@ -94,151 +91,6 @@ func (s *Suite) TestRenameUser(c *check.C) {
 	c.Assert(err, check.Equals, ErrUserExists)
 }
 
-func (s *Suite) TestGetMapResponseUserProfiles(c *check.C) {
-	userShared1, err := db.CreateUser("shared1")
-	c.Assert(err, check.IsNil)
-
-	userShared2, err := db.CreateUser("shared2")
-	c.Assert(err, check.IsNil)
-
-	userShared3, err := db.CreateUser("shared3")
-	c.Assert(err, check.IsNil)
-
-	preAuthKeyShared1, err := db.CreatePreAuthKey(
-		userShared1.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	preAuthKeyShared2, err := db.CreatePreAuthKey(
-		userShared2.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	preAuthKeyShared3, err := db.CreatePreAuthKey(
-		userShared3.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	preAuthKey2Shared1, err := db.CreatePreAuthKey(
-		userShared1.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	_, err = db.GetMachine(userShared1.Name, "test_get_shared_nodes_1")
-	c.Assert(err, check.NotNil)
-
-	machineInShared1 := &types.Machine{
-		ID:             1,
-		MachineKey:     "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
-		NodeKey:        "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
-		DiscoKey:       "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
-		Hostname:       "test_get_shared_nodes_1",
-		UserID:         userShared1.ID,
-		User:           *userShared1,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.1")},
-		AuthKeyID:      uint(preAuthKeyShared1.ID),
-	}
-	db.db.Save(machineInShared1)
-
-	_, err = db.GetMachine(userShared1.Name, machineInShared1.Hostname)
-	c.Assert(err, check.IsNil)
-
-	machineInShared2 := &types.Machine{
-		ID:             2,
-		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		Hostname:       "test_get_shared_nodes_2",
-		UserID:         userShared2.ID,
-		User:           *userShared2,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.2")},
-		AuthKeyID:      uint(preAuthKeyShared2.ID),
-	}
-	db.db.Save(machineInShared2)
-
-	_, err = db.GetMachine(userShared2.Name, machineInShared2.Hostname)
-	c.Assert(err, check.IsNil)
-
-	machineInShared3 := &types.Machine{
-		ID:             3,
-		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		Hostname:       "test_get_shared_nodes_3",
-		UserID:         userShared3.ID,
-		User:           *userShared3,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.3")},
-		AuthKeyID:      uint(preAuthKeyShared3.ID),
-	}
-	db.db.Save(machineInShared3)
-
-	_, err = db.GetMachine(userShared3.Name, machineInShared3.Hostname)
-	c.Assert(err, check.IsNil)
-
-	machine2InShared1 := &types.Machine{
-		ID:             4,
-		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		Hostname:       "test_get_shared_nodes_4",
-		UserID:         userShared1.ID,
-		User:           *userShared1,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.4")},
-		AuthKeyID:      uint(preAuthKey2Shared1.ID),
-	}
-	db.db.Save(machine2InShared1)
-
-	peersOfMachine1InShared1, err := db.getPeers([]tailcfg.FilterRule{}, machineInShared1)
-	c.Assert(err, check.IsNil)
-
-	userProfiles := db.GetMapResponseUserProfiles(
-		*machineInShared1,
-		peersOfMachine1InShared1,
-	)
-
-	c.Assert(len(userProfiles), check.Equals, 3)
-
-	found := false
-	for _, userProfiles := range userProfiles {
-		if userProfiles.DisplayName == userShared1.Name {
-			found = true
-
-			break
-		}
-	}
-	c.Assert(found, check.Equals, true)
-
-	found = false
-	for _, userProfile := range userProfiles {
-		if userProfile.DisplayName == userShared2.Name {
-			found = true
-
-			break
-		}
-	}
-	c.Assert(found, check.Equals, true)
-}
-
 func (s *Suite) TestSetMachineUser(c *check.C) {
 	oldUser, err := db.CreateUser("old")
 	c.Assert(err, check.IsNil)
diff --git a/hscontrol/derp_server.go b/hscontrol/derp_server.go
index 9ca6eee..f178802 100644
--- a/hscontrol/derp_server.go
+++ b/hscontrol/derp_server.go
@@ -32,7 +32,7 @@ type DERPServer struct {
 
 func (h *Headscale) NewDERPServer() (*DERPServer, error) {
 	log.Trace().Caller().Msg("Creating new embedded DERP server")
-	server := derp.NewServer(key.NodePrivate(*h.privateKey), log.Info().Msgf)
+	server := derp.NewServer(key.NodePrivate(*h.privateKey2019), log.Info().Msgf)
 	region, err := h.generateRegionLocalDERP()
 	if err != nil {
 		return nil, err
@@ -156,7 +156,7 @@ func (h *Headscale) DERPHandler(
 	log.Trace().Caller().Msgf("Hijacked connection from %v", req.RemoteAddr)
 
 	if !fastStart {
-		pubKey := h.privateKey.Public()
+		pubKey := h.privateKey2019.Public()
 		pubKeyStr, _ := pubKey.MarshalText() //nolint
 		fmt.Fprintf(conn, "HTTP/1.1 101 Switching Protocols\r\n"+
 			"Upgrade: DERP\r\n"+
diff --git a/hscontrol/dns.go b/hscontrol/dns.go
index 2c611f1..dcab04d 100644
--- a/hscontrol/dns.go
+++ b/hscontrol/dns.go
@@ -3,14 +3,9 @@ package hscontrol
 import (
 	"fmt"
 	"net/netip"
-	"net/url"
 	"strings"
 
-	mapset "github.com/deckarep/golang-set/v2"
-	"github.com/juanfont/headscale/hscontrol/types"
 	"go4.org/netipx"
-	"tailscale.com/tailcfg"
-	"tailscale.com/types/dnstype"
 	"tailscale.com/util/dnsname"
 )
 
@@ -23,10 +18,6 @@ const (
 	ipv6AddressLength = 128
 )
 
-const (
-	nextDNSDoHPrefix = "https://dns.nextdns.io"
-)
-
 // generateMagicDNSRootDomains generates a list of DNS entries to be included in `Routes` in `MapResponse`.
 // This list of reverse DNS entries instructs the OS on what subnets and domains the Tailscale embedded DNS
 // server (listening in 100.100.100.100 udp/53) should be used for.
@@ -158,63 +149,3 @@ func generateIPv6DNSRootDomain(ipPrefix netip.Prefix) []dnsname.FQDN {
 
 	return fqdns
 }
-
-// If any nextdns DoH resolvers are present in the list of resolvers it will
-// take metadata from the machine metadata and instruct tailscale to add it
-// to the requests. This makes it possible to identify from which device the
-// requests come in the NextDNS dashboard.
-//
-// This will produce a resolver like:
-// `https://dns.nextdns.io/<nextdns-id>?device_name=node-name&device_model=linux&device_ip=100.64.0.1`
-func addNextDNSMetadata(resolvers []*dnstype.Resolver, machine types.Machine) {
-	for _, resolver := range resolvers {
-		if strings.HasPrefix(resolver.Addr, nextDNSDoHPrefix) {
-			attrs := url.Values{
-				"device_name":  []string{machine.Hostname},
-				"device_model": []string{machine.HostInfo.OS},
-			}
-
-			if len(machine.IPAddresses) > 0 {
-				attrs.Add("device_ip", machine.IPAddresses[0].String())
-			}
-
-			resolver.Addr = fmt.Sprintf("%s?%s", resolver.Addr, attrs.Encode())
-		}
-	}
-}
-
-func getMapResponseDNSConfig(
-	dnsConfigOrig *tailcfg.DNSConfig,
-	baseDomain string,
-	machine types.Machine,
-	peers types.Machines,
-) *tailcfg.DNSConfig {
-	var dnsConfig *tailcfg.DNSConfig = dnsConfigOrig.Clone()
-	if dnsConfigOrig != nil && dnsConfigOrig.Proxied { // if MagicDNS is enabled
-		// Only inject the Search Domain of the current user - shared nodes should use their full FQDN
-		dnsConfig.Domains = append(
-			dnsConfig.Domains,
-			fmt.Sprintf(
-				"%s.%s",
-				machine.User.Name,
-				baseDomain,
-			),
-		)
-
-		userSet := mapset.NewSet[types.User]()
-		userSet.Add(machine.User)
-		for _, p := range peers {
-			userSet.Add(p.User)
-		}
-		for _, user := range userSet.ToSlice() {
-			dnsRoute := fmt.Sprintf("%v.%v", user.Name, baseDomain)
-			dnsConfig.Routes[dnsRoute] = nil
-		}
-	} else {
-		dnsConfig = dnsConfigOrig
-	}
-
-	addNextDNSMetadata(dnsConfig.Resolvers, machine)
-
-	return dnsConfig
-}
diff --git a/hscontrol/dns_test.go b/hscontrol/dns_test.go
index 6bee0ea..aae243c 100644
--- a/hscontrol/dns_test.go
+++ b/hscontrol/dns_test.go
@@ -1,14 +1,9 @@
 package hscontrol
 
 import (
-	"fmt"
 	"net/netip"
 
-	"github.com/juanfont/headscale/hscontrol/types"
-	"github.com/juanfont/headscale/hscontrol/util"
 	"gopkg.in/check.v1"
-	"tailscale.com/tailcfg"
-	"tailscale.com/types/dnstype"
 )
 
 func (s *Suite) TestMagicDNSRootDomains100(c *check.C) {
@@ -112,293 +107,3 @@ func (s *Suite) TestMagicDNSRootDomainsIPv6SingleMultiple(c *check.C) {
 	c.Assert(yieldsRoot("2.0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa."), check.Equals, true)
 	c.Assert(yieldsRoot("3.0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa."), check.Equals, true)
 }
-
-func (s *Suite) TestDNSConfigMapResponseWithMagicDNS(c *check.C) {
-	userShared1, err := app.db.CreateUser("shared1")
-	c.Assert(err, check.IsNil)
-
-	userShared2, err := app.db.CreateUser("shared2")
-	c.Assert(err, check.IsNil)
-
-	userShared3, err := app.db.CreateUser("shared3")
-	c.Assert(err, check.IsNil)
-
-	preAuthKeyInShared1, err := app.db.CreatePreAuthKey(
-		userShared1.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	preAuthKeyInShared2, err := app.db.CreatePreAuthKey(
-		userShared2.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	preAuthKeyInShared3, err := app.db.CreatePreAuthKey(
-		userShared3.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	PreAuthKey2InShared1, err := app.db.CreatePreAuthKey(
-		userShared1.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	_, err = app.db.GetMachine(userShared1.Name, "test_get_shared_nodes_1")
-	c.Assert(err, check.NotNil)
-
-	machineInShared1 := &types.Machine{
-		ID:             1,
-		MachineKey:     "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
-		NodeKey:        "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
-		DiscoKey:       "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
-		Hostname:       "test_get_shared_nodes_1",
-		UserID:         userShared1.ID,
-		User:           *userShared1,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.1")},
-		AuthKeyID:      uint(preAuthKeyInShared1.ID),
-	}
-	err = app.db.MachineSave(machineInShared1)
-	c.Assert(err, check.IsNil)
-
-	_, err = app.db.GetMachine(userShared1.Name, machineInShared1.Hostname)
-	c.Assert(err, check.IsNil)
-
-	machineInShared2 := &types.Machine{
-		ID:             2,
-		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		Hostname:       "test_get_shared_nodes_2",
-		UserID:         userShared2.ID,
-		User:           *userShared2,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.2")},
-		AuthKeyID:      uint(preAuthKeyInShared2.ID),
-	}
-	err = app.db.MachineSave(machineInShared2)
-	c.Assert(err, check.IsNil)
-
-	_, err = app.db.GetMachine(userShared2.Name, machineInShared2.Hostname)
-	c.Assert(err, check.IsNil)
-
-	machineInShared3 := &types.Machine{
-		ID:             3,
-		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		Hostname:       "test_get_shared_nodes_3",
-		UserID:         userShared3.ID,
-		User:           *userShared3,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.3")},
-		AuthKeyID:      uint(preAuthKeyInShared3.ID),
-	}
-	err = app.db.MachineSave(machineInShared3)
-	c.Assert(err, check.IsNil)
-
-	_, err = app.db.GetMachine(userShared3.Name, machineInShared3.Hostname)
-	c.Assert(err, check.IsNil)
-
-	machine2InShared1 := &types.Machine{
-		ID:             4,
-		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		Hostname:       "test_get_shared_nodes_4",
-		UserID:         userShared1.ID,
-		User:           *userShared1,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.4")},
-		AuthKeyID:      uint(PreAuthKey2InShared1.ID),
-	}
-	err = app.db.MachineSave(machine2InShared1)
-	c.Assert(err, check.IsNil)
-
-	baseDomain := "foobar.headscale.net"
-	dnsConfigOrig := tailcfg.DNSConfig{
-		Routes:  make(map[string][]*dnstype.Resolver),
-		Domains: []string{baseDomain},
-		Proxied: true,
-	}
-
-	peersOfMachineInShared1, err := app.db.GetValidPeers(app.aclRules, machineInShared1)
-	c.Assert(err, check.IsNil)
-
-	dnsConfig := getMapResponseDNSConfig(
-		&dnsConfigOrig,
-		baseDomain,
-		*machineInShared1,
-		peersOfMachineInShared1,
-	)
-	c.Assert(dnsConfig, check.NotNil)
-
-	c.Assert(len(dnsConfig.Routes), check.Equals, 3)
-
-	domainRouteShared1 := fmt.Sprintf("%s.%s", userShared1.Name, baseDomain)
-	_, ok := dnsConfig.Routes[domainRouteShared1]
-	c.Assert(ok, check.Equals, true)
-
-	domainRouteShared2 := fmt.Sprintf("%s.%s", userShared2.Name, baseDomain)
-	_, ok = dnsConfig.Routes[domainRouteShared2]
-	c.Assert(ok, check.Equals, true)
-
-	domainRouteShared3 := fmt.Sprintf("%s.%s", userShared3.Name, baseDomain)
-	_, ok = dnsConfig.Routes[domainRouteShared3]
-	c.Assert(ok, check.Equals, true)
-}
-
-func (s *Suite) TestDNSConfigMapResponseWithoutMagicDNS(c *check.C) {
-	userShared1, err := app.db.CreateUser("shared1")
-	c.Assert(err, check.IsNil)
-
-	userShared2, err := app.db.CreateUser("shared2")
-	c.Assert(err, check.IsNil)
-
-	userShared3, err := app.db.CreateUser("shared3")
-	c.Assert(err, check.IsNil)
-
-	preAuthKeyInShared1, err := app.db.CreatePreAuthKey(
-		userShared1.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	preAuthKeyInShared2, err := app.db.CreatePreAuthKey(
-		userShared2.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	preAuthKeyInShared3, err := app.db.CreatePreAuthKey(
-		userShared3.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	preAuthKey2InShared1, err := app.db.CreatePreAuthKey(
-		userShared1.Name,
-		false,
-		false,
-		nil,
-		nil,
-	)
-	c.Assert(err, check.IsNil)
-
-	_, err = app.db.GetMachine(userShared1.Name, "test_get_shared_nodes_1")
-	c.Assert(err, check.NotNil)
-
-	machineInShared1 := &types.Machine{
-		ID:             1,
-		MachineKey:     "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
-		NodeKey:        "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
-		DiscoKey:       "686824e749f3b7f2a5927ee6c1e422aee5292592d9179a271ed7b3e659b44a66",
-		Hostname:       "test_get_shared_nodes_1",
-		UserID:         userShared1.ID,
-		User:           *userShared1,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.1")},
-		AuthKeyID:      uint(preAuthKeyInShared1.ID),
-	}
-	err = app.db.MachineSave(machineInShared1)
-	c.Assert(err, check.IsNil)
-
-	_, err = app.db.GetMachine(userShared1.Name, machineInShared1.Hostname)
-	c.Assert(err, check.IsNil)
-
-	machineInShared2 := &types.Machine{
-		ID:             2,
-		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		Hostname:       "test_get_shared_nodes_2",
-		UserID:         userShared2.ID,
-		User:           *userShared2,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.2")},
-		AuthKeyID:      uint(preAuthKeyInShared2.ID),
-	}
-	err = app.db.MachineSave(machineInShared2)
-	c.Assert(err, check.IsNil)
-
-	_, err = app.db.GetMachine(userShared2.Name, machineInShared2.Hostname)
-	c.Assert(err, check.IsNil)
-
-	machineInShared3 := &types.Machine{
-		ID:             3,
-		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		Hostname:       "test_get_shared_nodes_3",
-		UserID:         userShared3.ID,
-		User:           *userShared3,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.3")},
-		AuthKeyID:      uint(preAuthKeyInShared3.ID),
-	}
-	err = app.db.MachineSave(machineInShared3)
-	c.Assert(err, check.IsNil)
-
-	_, err = app.db.GetMachine(userShared3.Name, machineInShared3.Hostname)
-	c.Assert(err, check.IsNil)
-
-	machine2InShared1 := &types.Machine{
-		ID:             4,
-		MachineKey:     "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		NodeKey:        "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		DiscoKey:       "dec46ef9dc45c7d2f03bfcd5a640d9e24e3cc68ce3d9da223867c9bc6d5e9863",
-		Hostname:       "test_get_shared_nodes_4",
-		UserID:         userShared1.ID,
-		User:           *userShared1,
-		RegisterMethod: util.RegisterMethodAuthKey,
-		IPAddresses:    []netip.Addr{netip.MustParseAddr("100.64.0.4")},
-		AuthKeyID:      uint(preAuthKey2InShared1.ID),
-	}
-	err = app.db.MachineSave(machine2InShared1)
-	c.Assert(err, check.IsNil)
-
-	baseDomain := "foobar.headscale.net"
-	dnsConfigOrig := tailcfg.DNSConfig{
-		Routes:  make(map[string][]*dnstype.Resolver),
-		Domains: []string{baseDomain},
-		Proxied: false,
-	}
-
-	peersOfMachine1Shared1, err := app.db.GetValidPeers(app.aclRules, machineInShared1)
-	c.Assert(err, check.IsNil)
-
-	dnsConfig := getMapResponseDNSConfig(
-		&dnsConfigOrig,
-		baseDomain,
-		*machineInShared1,
-		peersOfMachine1Shared1,
-	)
-	c.Assert(dnsConfig, check.NotNil)
-	c.Assert(len(dnsConfig.Routes), check.Equals, 0)
-	c.Assert(len(dnsConfig.Domains), check.Equals, 1)
-}
diff --git a/hscontrol/mapper/mapper.go b/hscontrol/mapper/mapper.go
new file mode 100644
index 0000000..5dfa949
--- /dev/null
+++ b/hscontrol/mapper/mapper.go
@@ -0,0 +1,418 @@
+package mapper
+
+import (
+	"encoding/binary"
+	"encoding/json"
+	"fmt"
+	"net/url"
+	"strings"
+	"sync"
+	"time"
+
+	mapset "github.com/deckarep/golang-set/v2"
+	"github.com/juanfont/headscale/hscontrol/db"
+	"github.com/juanfont/headscale/hscontrol/policy"
+	"github.com/juanfont/headscale/hscontrol/types"
+	"github.com/juanfont/headscale/hscontrol/util"
+	"github.com/klauspost/compress/zstd"
+	"github.com/rs/zerolog/log"
+	"tailscale.com/smallzstd"
+	"tailscale.com/tailcfg"
+	"tailscale.com/types/dnstype"
+	"tailscale.com/types/key"
+)
+
+const (
+	nextDNSDoHPrefix           = "https://dns.nextdns.io"
+	reservedResponseHeaderSize = 4
+)
+
+type Mapper struct {
+	db *db.HSDatabase
+
+	privateKey2019 *key.MachinePrivate
+	isNoise        bool
+
+	// Configuration
+	// TODO(kradalby): figure out if this is the format we want this in
+	derpMap          *tailcfg.DERPMap
+	baseDomain       string
+	dnsCfg           *tailcfg.DNSConfig
+	logtail          bool
+	randomClientPort bool
+	stripEmailDomain bool
+}
+
+func NewMapper(
+	db *db.HSDatabase,
+	privateKey *key.MachinePrivate,
+	isNoise bool,
+	derpMap *tailcfg.DERPMap,
+	baseDomain string,
+	dnsCfg *tailcfg.DNSConfig,
+	logtail bool,
+	randomClientPort bool,
+	stripEmailDomain bool,
+) *Mapper {
+	return &Mapper{
+		db: db,
+
+		privateKey2019: privateKey,
+		isNoise:        isNoise,
+
+		derpMap:          derpMap,
+		baseDomain:       baseDomain,
+		dnsCfg:           dnsCfg,
+		logtail:          logtail,
+		randomClientPort: randomClientPort,
+		stripEmailDomain: stripEmailDomain,
+	}
+}
+
+func (m Mapper) fullMapResponse(
+	mapRequest tailcfg.MapRequest,
+	machine *types.Machine,
+	pol *policy.ACLPolicy,
+) (*tailcfg.MapResponse, error) {
+	log.Trace().
+		Caller().
+		Str("machine", mapRequest.Hostinfo.Hostname).
+		Msg("Creating Map response")
+
+	// TODO(kradalby): Decouple this from DB?
+	node, err := m.db.TailNode(*machine, pol, m.dnsCfg)
+	if err != nil {
+		log.Error().
+			Caller().
+			Err(err).
+			Msg("Cannot convert to node")
+
+		return nil, err
+	}
+
+	peers, err := m.db.ListPeers(machine)
+	if err != nil {
+		log.Error().
+			Caller().
+			Err(err).
+			Msg("Cannot fetch peers")
+
+		return nil, err
+	}
+
+	rules, sshPolicy, err := policy.GenerateFilterRules(pol, peers, m.stripEmailDomain)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(rules) > 0 {
+		peers = policy.FilterMachinesByACL(machine, peers, rules)
+	}
+
+	profiles := generateUserProfiles(machine, peers, m.baseDomain)
+
+	// TODO(kradalby): Decouple this from DB?
+	nodePeers, err := m.db.TailNodes(peers, pol, m.dnsCfg)
+	if err != nil {
+		log.Error().
+			Caller().
+			Err(err).
+			Msg("Failed to convert peers to Tailscale nodes")
+
+		return nil, err
+	}
+
+	// TODO(kradalby): Shold this mutation happen before TailNode(s) is called?
+	dnsConfig := generateDNSConfig(
+		m.dnsCfg,
+		m.baseDomain,
+		*machine,
+		peers,
+	)
+
+	now := time.Now()
+
+	resp := tailcfg.MapResponse{
+		KeepAlive: false,
+		Node:      node,
+
+		// TODO: Only send if updated
+		DERPMap: m.derpMap,
+
+		// TODO: Only send if updated
+		Peers: nodePeers,
+
+		// TODO(kradalby): Implement:
+		// https://github.com/tailscale/tailscale/blob/main/tailcfg/tailcfg.go#L1351-L1374
+		// PeersChanged
+		// PeersRemoved
+		// PeersChangedPatch
+		// PeerSeenChange
+		// OnlineChange
+
+		// TODO: Only send if updated
+		DNSConfig: dnsConfig,
+
+		// TODO: Only send if updated
+		Domain: m.baseDomain,
+
+		// Do not instruct clients to collect services, we do not
+		// support or do anything with them
+		CollectServices: "false",
+
+		// TODO: Only send if updated
+		PacketFilter: rules,
+
+		UserProfiles: profiles,
+
+		// TODO: Only send if updated
+		SSHPolicy: sshPolicy,
+
+		ControlTime: &now,
+
+		Debug: &tailcfg.Debug{
+			DisableLogTail:      !m.logtail,
+			RandomizeClientPort: m.randomClientPort,
+		},
+	}
+
+	log.Trace().
+		Caller().
+		Str("machine", mapRequest.Hostinfo.Hostname).
+		// Interface("payload", resp).
+		Msgf("Generated map response: %s", util.TailMapResponseToString(resp))
+
+	return &resp, nil
+}
+
+func generateUserProfiles(
+	machine *types.Machine,
+	peers types.Machines,
+	baseDomain string,
+) []tailcfg.UserProfile {
+	userMap := make(map[string]types.User)
+	userMap[machine.User.Name] = machine.User
+	for _, peer := range peers {
+		userMap[peer.User.Name] = peer.User // not worth checking if already is there
+	}
+
+	profiles := []tailcfg.UserProfile{}
+	for _, user := range userMap {
+		displayName := user.Name
+
+		if baseDomain != "" {
+			displayName = fmt.Sprintf("%s@%s", user.Name, baseDomain)
+		}
+
+		profiles = append(profiles,
+			tailcfg.UserProfile{
+				ID:          tailcfg.UserID(user.ID),
+				LoginName:   user.Name,
+				DisplayName: displayName,
+			})
+	}
+
+	return profiles
+}
+
+func generateDNSConfig(
+	base *tailcfg.DNSConfig,
+	baseDomain string,
+	machine types.Machine,
+	peers types.Machines,
+) *tailcfg.DNSConfig {
+	dnsConfig := base.Clone()
+
+	// if MagicDNS is enabled
+	if base != nil && base.Proxied {
+		// Only inject the Search Domain of the current user
+		// shared nodes should use their full FQDN
+		dnsConfig.Domains = append(
+			dnsConfig.Domains,
+			fmt.Sprintf(
+				"%s.%s",
+				machine.User.Name,
+				baseDomain,
+			),
+		)
+
+		userSet := mapset.NewSet[types.User]()
+		userSet.Add(machine.User)
+		for _, p := range peers {
+			userSet.Add(p.User)
+		}
+		for _, user := range userSet.ToSlice() {
+			dnsRoute := fmt.Sprintf("%v.%v", user.Name, baseDomain)
+			dnsConfig.Routes[dnsRoute] = nil
+		}
+	} else {
+		dnsConfig = base
+	}
+
+	addNextDNSMetadata(dnsConfig.Resolvers, machine)
+
+	return dnsConfig
+}
+
+// If any nextdns DoH resolvers are present in the list of resolvers it will
+// take metadata from the machine metadata and instruct tailscale to add it
+// to the requests. This makes it possible to identify from which device the
+// requests come in the NextDNS dashboard.
+//
+// This will produce a resolver like:
+// `https://dns.nextdns.io/<nextdns-id>?device_name=node-name&device_model=linux&device_ip=100.64.0.1`
+func addNextDNSMetadata(resolvers []*dnstype.Resolver, machine types.Machine) {
+	for _, resolver := range resolvers {
+		if strings.HasPrefix(resolver.Addr, nextDNSDoHPrefix) {
+			attrs := url.Values{
+				"device_name":  []string{machine.Hostname},
+				"device_model": []string{machine.HostInfo.OS},
+			}
+
+			if len(machine.IPAddresses) > 0 {
+				attrs.Add("device_ip", machine.IPAddresses[0].String())
+			}
+
+			resolver.Addr = fmt.Sprintf("%s?%s", resolver.Addr, attrs.Encode())
+		}
+	}
+}
+
+func (m Mapper) CreateMapResponse(
+	mapRequest tailcfg.MapRequest,
+	machine *types.Machine,
+	pol *policy.ACLPolicy,
+) ([]byte, error) {
+	mapResponse, err := m.fullMapResponse(mapRequest, machine, pol)
+	if err != nil {
+		return nil, err
+	}
+
+	if m.isNoise {
+		return m.marshalMapResponse(mapResponse, key.MachinePublic{}, mapRequest.Compress)
+	}
+
+	var machineKey key.MachinePublic
+	err = machineKey.UnmarshalText([]byte(util.MachinePublicKeyEnsurePrefix(machine.MachineKey)))
+	if err != nil {
+		log.Error().
+			Caller().
+			Err(err).
+			Msg("Cannot parse client key")
+
+		return nil, err
+	}
+
+	return m.marshalMapResponse(mapResponse, machineKey, mapRequest.Compress)
+}
+
+func (m Mapper) CreateKeepAliveResponse(
+	mapRequest tailcfg.MapRequest,
+	machine *types.Machine,
+) ([]byte, error) {
+	keepAliveResponse := tailcfg.MapResponse{
+		KeepAlive: true,
+	}
+
+	if m.isNoise {
+		return m.marshalMapResponse(
+			keepAliveResponse,
+			key.MachinePublic{},
+			mapRequest.Compress,
+		)
+	}
+
+	var machineKey key.MachinePublic
+	err := machineKey.UnmarshalText([]byte(util.MachinePublicKeyEnsurePrefix(machine.MachineKey)))
+	if err != nil {
+		log.Error().
+			Caller().
+			Err(err).
+			Msg("Cannot parse client key")
+
+		return nil, err
+	}
+
+	return m.marshalMapResponse(keepAliveResponse, machineKey, mapRequest.Compress)
+}
+
+func MarshalResponse(
+	resp interface{},
+	privateKey2019 *key.MachinePrivate,
+	machineKey key.MachinePublic,
+) ([]byte, error) {
+	jsonBody, err := json.Marshal(resp)
+	if err != nil {
+		log.Error().
+			Caller().
+			Err(err).
+			Msg("Cannot marshal response")
+
+		return nil, err
+	}
+
+	if privateKey2019 != nil {
+		return privateKey2019.SealTo(machineKey, jsonBody), nil
+	}
+
+	return jsonBody, nil
+}
+
+func (m Mapper) marshalMapResponse(
+	resp interface{},
+	machineKey key.MachinePublic,
+	compression string,
+) ([]byte, error) {
+	jsonBody, err := json.Marshal(resp)
+	if err != nil {
+		log.Error().
+			Caller().
+			Err(err).
+			Msg("Cannot marshal map response")
+	}
+
+	var respBody []byte
+	if compression == util.ZstdCompression {
+		respBody = zstdEncode(jsonBody)
+		if !m.isNoise { // if legacy protocol
+			respBody = m.privateKey2019.SealTo(machineKey, respBody)
+		}
+	} else {
+		if !m.isNoise { // if legacy protocol
+			respBody = m.privateKey2019.SealTo(machineKey, jsonBody)
+		} else {
+			respBody = jsonBody
+		}
+	}
+
+	data := make([]byte, reservedResponseHeaderSize)
+	binary.LittleEndian.PutUint32(data, uint32(len(respBody)))
+	data = append(data, respBody...)
+
+	return data, nil
+}
+
+func zstdEncode(in []byte) []byte {
+	encoder, ok := zstdEncoderPool.Get().(*zstd.Encoder)
+	if !ok {
+		panic("invalid type in sync pool")
+	}
+	out := encoder.EncodeAll(in, nil)
+	_ = encoder.Close()
+	zstdEncoderPool.Put(encoder)
+
+	return out
+}
+
+var zstdEncoderPool = &sync.Pool{
+	New: func() any {
+		encoder, err := smallzstd.NewEncoder(
+			nil,
+			zstd.WithEncoderLevel(zstd.SpeedFastest))
+		if err != nil {
+			panic(err)
+		}
+
+		return encoder
+	},
+}
diff --git a/hscontrol/mapper/mapper_test.go b/hscontrol/mapper/mapper_test.go
new file mode 100644
index 0000000..a5d65c9
--- /dev/null
+++ b/hscontrol/mapper/mapper_test.go
@@ -0,0 +1,131 @@
+package mapper
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"github.com/google/go-cmp/cmp/cmpopts"
+	"github.com/juanfont/headscale/hscontrol/types"
+	"gopkg.in/check.v1"
+	"tailscale.com/tailcfg"
+	"tailscale.com/types/dnstype"
+)
+
+func (s *Suite) TestGetMapResponseUserProfiles(c *check.C) {
+	mach := func(hostname, username string, userid uint) types.Machine {
+		return types.Machine{
+			Hostname: hostname,
+			UserID:   userid,
+			User: types.User{
+				Name: username,
+			},
+		}
+	}
+
+	machineInShared1 := mach("test_get_shared_nodes_1", "user1", 1)
+	machineInShared2 := mach("test_get_shared_nodes_2", "user2", 2)
+	machineInShared3 := mach("test_get_shared_nodes_3", "user3", 3)
+	machine2InShared1 := mach("test_get_shared_nodes_4", "user1", 1)
+
+	userProfiles := generateUserProfiles(
+		&machineInShared1,
+		types.Machines{
+			machineInShared2, machineInShared3, machine2InShared1,
+		},
+		"",
+	)
+
+	c.Assert(len(userProfiles), check.Equals, 3)
+
+	users := []string{
+		"user1", "user2", "user3",
+	}
+
+	for _, user := range users {
+		found := false
+		for _, userProfile := range userProfiles {
+			if userProfile.DisplayName == user {
+				found = true
+
+				break
+			}
+		}
+		c.Assert(found, check.Equals, true)
+	}
+}
+
+func TestDNSConfigMapResponse(t *testing.T) {
+	tests := []struct {
+		magicDNS bool
+		want     *tailcfg.DNSConfig
+	}{
+		{
+			magicDNS: true,
+			want: &tailcfg.DNSConfig{
+				Routes: map[string][]*dnstype.Resolver{
+					"shared1.foobar.headscale.net": {},
+					"shared2.foobar.headscale.net": {},
+					"shared3.foobar.headscale.net": {},
+				},
+				Domains: []string{
+					"foobar.headscale.net",
+					"shared1.foobar.headscale.net",
+				},
+				Proxied: true,
+			},
+		},
+		{
+			magicDNS: false,
+			want: &tailcfg.DNSConfig{
+				Domains: []string{"foobar.headscale.net"},
+				Proxied: false,
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(fmt.Sprintf("with-magicdns-%v", tt.magicDNS), func(t *testing.T) {
+			mach := func(hostname, username string, userid uint) types.Machine {
+				return types.Machine{
+					Hostname: hostname,
+					UserID:   userid,
+					User: types.User{
+						Name: username,
+					},
+				}
+			}
+
+			baseDomain := "foobar.headscale.net"
+
+			dnsConfigOrig := tailcfg.DNSConfig{
+				Routes:  make(map[string][]*dnstype.Resolver),
+				Domains: []string{baseDomain},
+				Proxied: tt.magicDNS,
+			}
+
+			machineInShared1 := mach("test_get_shared_nodes_1", "shared1", 1)
+			machineInShared2 := mach("test_get_shared_nodes_2", "shared2", 2)
+			machineInShared3 := mach("test_get_shared_nodes_3", "shared3", 3)
+			machine2InShared1 := mach("test_get_shared_nodes_4", "shared1", 1)
+
+			peersOfMachineInShared1 := types.Machines{
+				machineInShared1,
+				machineInShared2,
+				machineInShared3,
+				machine2InShared1,
+			}
+
+			got := generateDNSConfig(
+				&dnsConfigOrig,
+				baseDomain,
+				machineInShared1,
+				peersOfMachineInShared1,
+			)
+
+			if diff := cmp.Diff(tt.want, got, cmpopts.EquateEmpty()); diff != "" {
+				t.Errorf("expandAlias() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
diff --git a/hscontrol/mapper/suite_test.go b/hscontrol/mapper/suite_test.go
new file mode 100644
index 0000000..c9b1a58
--- /dev/null
+++ b/hscontrol/mapper/suite_test.go
@@ -0,0 +1,15 @@
+package mapper
+
+import (
+	"testing"
+
+	"gopkg.in/check.v1"
+)
+
+func Test(t *testing.T) {
+	check.TestingT(t)
+}
+
+var _ = check.Suite(&Suite{})
+
+type Suite struct{}
diff --git a/hscontrol/protocol_common.go b/hscontrol/protocol_common.go
index ae034fb..c0ba924 100644
--- a/hscontrol/protocol_common.go
+++ b/hscontrol/protocol_common.go
@@ -9,6 +9,7 @@ import (
 	"strings"
 	"time"
 
+	"github.com/juanfont/headscale/hscontrol/mapper"
 	"github.com/juanfont/headscale/hscontrol/types"
 	"github.com/juanfont/headscale/hscontrol/util"
 	"github.com/rs/zerolog/log"
@@ -61,7 +62,7 @@ func (h *Headscale) KeyHandler(
 		// TS2021 (Tailscale v2 protocol) requires to have a different key
 		if clientCapabilityVersion >= NoiseCapabilityVersion {
 			resp := tailcfg.OverTLSPublicKeyResponse{
-				LegacyPublicKey: h.privateKey.Public(),
+				LegacyPublicKey: h.privateKey2019.Public(),
 				PublicKey:       h.noisePrivateKey.Public(),
 			}
 			writer.Header().Set("Content-Type", "application/json")
@@ -84,7 +85,7 @@ func (h *Headscale) KeyHandler(
 	// Old clients don't send a 'v' parameter, so we send the legacy public key
 	writer.Header().Set("Content-Type", "text/plain; charset=utf-8")
 	writer.WriteHeader(http.StatusOK)
-	_, err := writer.Write([]byte(util.MachinePublicKeyStripPrefix(h.privateKey.Public())))
+	_, err := writer.Write([]byte(util.MachinePublicKeyStripPrefix(h.privateKey2019.Public())))
 	if err != nil {
 		log.Error().
 			Caller().
@@ -323,7 +324,7 @@ func (h *Headscale) handleAuthKeyCommon(
 			Msg("Failed authentication via AuthKey")
 		resp.MachineAuthorized = false
 
-		respBody, err := h.marshalResponse(resp, machineKey, isNoise)
+		respBody, err := mapper.MarshalResponse(resp, h.privateKey2019, machineKey)
 		if err != nil {
 			log.Error().
 				Caller().
@@ -483,7 +484,7 @@ func (h *Headscale) handleAuthKeyCommon(
 	// Otherwise it will need to exec `tailscale up` twice to fetch the *LoginName*
 	resp.Login = *pak.User.TailscaleLogin()
 
-	respBody, err := h.marshalResponse(resp, machineKey, isNoise)
+	respBody, err := mapper.MarshalResponse(resp, h.privateKey2019, machineKey)
 	if err != nil {
 		log.Error().
 			Caller().
@@ -548,7 +549,7 @@ func (h *Headscale) handleNewMachineCommon(
 			registerRequest.NodeKey)
 	}
 
-	respBody, err := h.marshalResponse(resp, machineKey, isNoise)
+	respBody, err := mapper.MarshalResponse(resp, h.privateKey2019, machineKey)
 	if err != nil {
 		log.Error().
 			Caller().
@@ -609,7 +610,7 @@ func (h *Headscale) handleMachineLogOutCommon(
 	resp.MachineAuthorized = false
 	resp.NodeKeyExpired = true
 	resp.User = *machine.User.TailscaleUser()
-	respBody, err := h.marshalResponse(resp, machineKey, isNoise)
+	respBody, err := mapper.MarshalResponse(resp, h.privateKey2019, machineKey)
 	if err != nil {
 		log.Error().
 			Caller().
@@ -673,7 +674,7 @@ func (h *Headscale) handleMachineValidRegistrationCommon(
 	resp.User = *machine.User.TailscaleUser()
 	resp.Login = *machine.User.TailscaleLogin()
 
-	respBody, err := h.marshalResponse(resp, machineKey, isNoise)
+	respBody, err := mapper.MarshalResponse(resp, h.privateKey2019, machineKey)
 	if err != nil {
 		log.Error().
 			Caller().
@@ -735,7 +736,7 @@ func (h *Headscale) handleMachineRefreshKeyCommon(
 
 	resp.AuthURL = ""
 	resp.User = *machine.User.TailscaleUser()
-	respBody, err := h.marshalResponse(resp, machineKey, isNoise)
+	respBody, err := mapper.MarshalResponse(resp, h.privateKey2019, machineKey)
 	if err != nil {
 		log.Error().
 			Caller().
@@ -802,7 +803,7 @@ func (h *Headscale) handleMachineExpiredOrLoggedOutCommon(
 			registerRequest.NodeKey)
 	}
 
-	respBody, err := h.marshalResponse(resp, machineKey, isNoise)
+	respBody, err := mapper.MarshalResponse(resp, h.privateKey2019, machineKey)
 	if err != nil {
 		log.Error().
 			Caller().
diff --git a/hscontrol/protocol_common_poll.go b/hscontrol/protocol_common_poll.go
index 3d43238..27c5d82 100644
--- a/hscontrol/protocol_common_poll.go
+++ b/hscontrol/protocol_common_poll.go
@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"time"
 
+	"github.com/juanfont/headscale/hscontrol/mapper"
 	"github.com/juanfont/headscale/hscontrol/types"
 	"github.com/juanfont/headscale/hscontrol/util"
 	"github.com/rs/zerolog/log"
@@ -29,6 +30,19 @@ func (h *Headscale) handlePollCommon(
 	mapRequest tailcfg.MapRequest,
 	isNoise bool,
 ) {
+	// TODO(kradalby): This is a stepping stone, mapper should be initiated once
+	// per client or something similar
+	mapp := mapper.NewMapper(h.db,
+		h.privateKey2019,
+		isNoise,
+		h.DERPMap,
+		h.cfg.BaseDomain,
+		h.cfg.DNSConfig,
+		h.cfg.LogTail.Enabled,
+		h.cfg.RandomizeClientPort,
+		h.cfg.OIDC.StripEmaildomain,
+	)
+
 	machine.Hostname = mapRequest.Hostinfo.Hostname
 	machine.HostInfo = types.HostInfo(*mapRequest.Hostinfo)
 	machine.DiscoKey = util.DiscoPublicKeyStripPrefix(mapRequest.DiscoKey)
@@ -87,7 +101,7 @@ func (h *Headscale) handlePollCommon(
 		return
 	}
 
-	mapResp, err := h.getMapResponseData(mapRequest, machine, isNoise)
+	mapResp, err := mapp.CreateMapResponse(mapRequest, machine, h.ACLPolicy)
 	if err != nil {
 		log.Error().
 			Str("handler", "PollNetMap").
@@ -245,6 +259,19 @@ func (h *Headscale) pollNetMapStream(
 	updateChan chan struct{},
 	isNoise bool,
 ) {
+	// TODO(kradalby): This is a stepping stone, mapper should be initiated once
+	// per client or something similar
+	mapp := mapper.NewMapper(h.db,
+		h.privateKey2019,
+		isNoise,
+		h.DERPMap,
+		h.cfg.BaseDomain,
+		h.cfg.DNSConfig,
+		h.cfg.LogTail.Enabled,
+		h.cfg.RandomizeClientPort,
+		h.cfg.OIDC.StripEmaildomain,
+	)
+
 	h.pollNetMapStreamWG.Add(1)
 	defer h.pollNetMapStreamWG.Done()
 
@@ -463,7 +490,7 @@ func (h *Headscale) pollNetMapStream(
 					Time("last_successful_update", lastUpdate).
 					Time("last_state_change", h.getLastStateChange(machine.User)).
 					Msgf("There has been updates since the last successful update to %s", machine.Hostname)
-				data, err := h.getMapResponseData(mapRequest, machine, isNoise)
+				data, err := mapp.CreateMapResponse(mapRequest, machine, h.ACLPolicy)
 				if err != nil {
 					log.Error().
 						Str("handler", "PollNetMapStream").
@@ -623,6 +650,19 @@ func (h *Headscale) scheduledPollWorker(
 	machine *types.Machine,
 	isNoise bool,
 ) {
+	// TODO(kradalby): This is a stepping stone, mapper should be initiated once
+	// per client or something similar
+	mapp := mapper.NewMapper(h.db,
+		h.privateKey2019,
+		isNoise,
+		h.DERPMap,
+		h.cfg.BaseDomain,
+		h.cfg.DNSConfig,
+		h.cfg.LogTail.Enabled,
+		h.cfg.RandomizeClientPort,
+		h.cfg.OIDC.StripEmaildomain,
+	)
+
 	keepAliveTicker := time.NewTicker(keepAliveInterval)
 	updateCheckerTicker := time.NewTicker(h.cfg.NodeUpdateCheckInterval)
 
@@ -643,7 +683,7 @@ func (h *Headscale) scheduledPollWorker(
 			return
 
 		case <-keepAliveTicker.C:
-			data, err := h.getMapKeepAliveResponseData(mapRequest, machine, isNoise)
+			data, err := mapp.CreateKeepAliveResponse(mapRequest, machine)
 			if err != nil {
 				log.Error().
 					Str("func", "keepAlive").
diff --git a/hscontrol/protocol_common_utils.go b/hscontrol/protocol_common_utils.go
index 8990eeb..7b0b0ac 100644
--- a/hscontrol/protocol_common_utils.go
+++ b/hscontrol/protocol_common_utils.go
@@ -1,157 +1 @@
 package hscontrol
-
-import (
-	"encoding/binary"
-	"encoding/json"
-	"sync"
-
-	"github.com/juanfont/headscale/hscontrol/types"
-	"github.com/juanfont/headscale/hscontrol/util"
-	"github.com/klauspost/compress/zstd"
-	"github.com/rs/zerolog/log"
-	"tailscale.com/smallzstd"
-	"tailscale.com/tailcfg"
-	"tailscale.com/types/key"
-)
-
-func (h *Headscale) getMapResponseData(
-	mapRequest tailcfg.MapRequest,
-	machine *types.Machine,
-	isNoise bool,
-) ([]byte, error) {
-	mapResponse, err := h.generateMapResponse(mapRequest, machine)
-	if err != nil {
-		return nil, err
-	}
-
-	if isNoise {
-		return h.marshalMapResponse(mapResponse, key.MachinePublic{}, mapRequest.Compress, isNoise)
-	}
-
-	var machineKey key.MachinePublic
-	err = machineKey.UnmarshalText([]byte(util.MachinePublicKeyEnsurePrefix(machine.MachineKey)))
-	if err != nil {
-		log.Error().
-			Caller().
-			Err(err).
-			Msg("Cannot parse client key")
-
-		return nil, err
-	}
-
-	return h.marshalMapResponse(mapResponse, machineKey, mapRequest.Compress, isNoise)
-}
-
-func (h *Headscale) getMapKeepAliveResponseData(
-	mapRequest tailcfg.MapRequest,
-	machine *types.Machine,
-	isNoise bool,
-) ([]byte, error) {
-	keepAliveResponse := tailcfg.MapResponse{
-		KeepAlive: true,
-	}
-
-	if isNoise {
-		return h.marshalMapResponse(
-			keepAliveResponse,
-			key.MachinePublic{},
-			mapRequest.Compress,
-			isNoise,
-		)
-	}
-
-	var machineKey key.MachinePublic
-	err := machineKey.UnmarshalText([]byte(util.MachinePublicKeyEnsurePrefix(machine.MachineKey)))
-	if err != nil {
-		log.Error().
-			Caller().
-			Err(err).
-			Msg("Cannot parse client key")
-
-		return nil, err
-	}
-
-	return h.marshalMapResponse(keepAliveResponse, machineKey, mapRequest.Compress, isNoise)
-}
-
-func (h *Headscale) marshalResponse(
-	resp interface{},
-	machineKey key.MachinePublic,
-	isNoise bool,
-) ([]byte, error) {
-	jsonBody, err := json.Marshal(resp)
-	if err != nil {
-		log.Error().
-			Caller().
-			Err(err).
-			Msg("Cannot marshal response")
-
-		return nil, err
-	}
-
-	if isNoise {
-		return jsonBody, nil
-	}
-
-	return h.privateKey.SealTo(machineKey, jsonBody), nil
-}
-
-func (h *Headscale) marshalMapResponse(
-	resp interface{},
-	machineKey key.MachinePublic,
-	compression string,
-	isNoise bool,
-) ([]byte, error) {
-	jsonBody, err := json.Marshal(resp)
-	if err != nil {
-		log.Error().
-			Caller().
-			Err(err).
-			Msg("Cannot marshal map response")
-	}
-
-	var respBody []byte
-	if compression == util.ZstdCompression {
-		respBody = zstdEncode(jsonBody)
-		if !isNoise { // if legacy protocol
-			respBody = h.privateKey.SealTo(machineKey, respBody)
-		}
-	} else {
-		if !isNoise { // if legacy protocol
-			respBody = h.privateKey.SealTo(machineKey, jsonBody)
-		} else {
-			respBody = jsonBody
-		}
-	}
-
-	data := make([]byte, reservedResponseHeaderSize)
-	binary.LittleEndian.PutUint32(data, uint32(len(respBody)))
-	data = append(data, respBody...)
-
-	return data, nil
-}
-
-func zstdEncode(in []byte) []byte {
-	encoder, ok := zstdEncoderPool.Get().(*zstd.Encoder)
-	if !ok {
-		panic("invalid type in sync pool")
-	}
-	out := encoder.EncodeAll(in, nil)
-	_ = encoder.Close()
-	zstdEncoderPool.Put(encoder)
-
-	return out
-}
-
-var zstdEncoderPool = &sync.Pool{
-	New: func() any {
-		encoder, err := smallzstd.NewEncoder(
-			nil,
-			zstd.WithEncoderLevel(zstd.SpeedFastest))
-		if err != nil {
-			panic(err)
-		}
-
-		return encoder
-	},
-}
diff --git a/hscontrol/protocol_legacy.go b/hscontrol/protocol_legacy.go
index f443eba..06eb314 100644
--- a/hscontrol/protocol_legacy.go
+++ b/hscontrol/protocol_legacy.go
@@ -45,7 +45,7 @@ func (h *Headscale) RegistrationHandler(
 		return
 	}
 	registerRequest := tailcfg.RegisterRequest{}
-	err = util.DecodeAndUnmarshalNaCl(body, &registerRequest, &machineKey, h.privateKey)
+	err = util.DecodeAndUnmarshalNaCl(body, &registerRequest, &machineKey, h.privateKey2019)
 	if err != nil {
 		log.Error().
 			Caller().
diff --git a/hscontrol/protocol_legacy_poll.go b/hscontrol/protocol_legacy_poll.go
index 3755faf..27e38a9 100644
--- a/hscontrol/protocol_legacy_poll.go
+++ b/hscontrol/protocol_legacy_poll.go
@@ -57,7 +57,7 @@ func (h *Headscale) PollNetMapHandler(
 		return
 	}
 	mapRequest := tailcfg.MapRequest{}
-	err = util.DecodeAndUnmarshalNaCl(body, &mapRequest, &machineKey, h.privateKey)
+	err = util.DecodeAndUnmarshalNaCl(body, &mapRequest, &machineKey, h.privateKey2019)
 	if err != nil {
 		log.Error().
 			Str("handler", "PollNetMap").