feat(api): add fingerprint + posture fields to client state

Former-commit-id: 566084683a

api/api.go

@@ -61,6 +61,11 @@ type StatusResponse struct {
 	NetworkSettings network.NetworkSettings `json:"networkSettings,omitempty"`
 }
 
+type MetadataChangeRequest struct {
+	Fingerprint map[string]any `json:"fingerprint"`
+	Postures    map[string]any `json:"postures"`
+}
+
 // API represents the HTTP server and its state
 type API struct {
 	addr       string
@@ -68,10 +73,11 @@ type API struct {
 	listener   net.Listener
 	server     *http.Server
 
-	onConnect    func(ConnectionRequest) error
-	onSwitchOrg  func(SwitchOrgRequest) error
-	onDisconnect func() error
-	onExit       func() error
+	onConnect        func(ConnectionRequest) error
+	onSwitchOrg      func(SwitchOrgRequest) error
+	onMetadataChange func(MetadataChangeRequest) error
+	onDisconnect     func() error
+	onExit           func() error
 
 	statusMu     sync.RWMutex
 	peerStatuses map[int]*PeerStatus
@@ -117,6 +123,7 @@ func NewAPIStub() *API {
 func (s *API) SetHandlers(
 	onConnect func(ConnectionRequest) error,
 	onSwitchOrg func(SwitchOrgRequest) error,
+	onMetadataChange func(MetadataChangeRequest) error,
 	onDisconnect func() error,
 	onExit func() error,
 ) {
@@ -136,6 +143,7 @@ func (s *API) Start() error {
 	mux.HandleFunc("/connect", s.handleConnect)
 	mux.HandleFunc("/status", s.handleStatus)
 	mux.HandleFunc("/switch-org", s.handleSwitchOrg)
+	mux.HandleFunc("/metadata", s.handleMetadataChange)
 	mux.HandleFunc("/disconnect", s.handleDisconnect)
 	mux.HandleFunc("/exit", s.handleExit)
 	mux.HandleFunc("/health", s.handleHealth)
@@ -514,6 +522,32 @@ func (s *API) handleDisconnect(w http.ResponseWriter, r *http.Request) {
 	})
 }
 
+// handleMetadataChange handles the /metadata endpoint
+func (s *API) handleMetadataChange(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPut {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	var req MetadataChangeRequest
+	decoder := json.NewDecoder(r.Body)
+	if err := decoder.Decode(&req); err != nil {
+		http.Error(w, fmt.Sprintf("Invalid request: %v", err), http.StatusBadRequest)
+		return
+	}
+
+	logger.Info("Received metadata change request via API: %v", req)
+
+	_ = s.onMetadataChange(req)
+
+	// Return a success response
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	_ = json.NewEncoder(w).Encode(map[string]string{
+		"status": "metadata updated",
+	})
+}
+
 func (s *API) GetStatus() StatusResponse {
 	return StatusResponse{
 		Connected:       s.isConnected,

olm/olm.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 	_ "net/http/pprof"
 	"os"
+	"sync"
 	"time"
 
 	"github.com/fosrl/newt/bind"
@@ -51,6 +52,11 @@ type Olm struct {
 	olmConfig    OlmConfig
 	tunnelConfig TunnelConfig
 
+	// Metadata to send alongside pings
+	fingerprint map[string]any
+	postures    map[string]any
+	metaMu      sync.Mutex
+
 	stopRegister   func()
 	stopPeerSend   func()
 	updateRegister func(newData any)
@@ -229,6 +235,20 @@ func (o *Olm) registerAPICallbacks() {
 			logger.Info("Received switch organization request via HTTP: orgID=%s", req.OrgID)
 			return o.SwitchOrg(req.OrgID)
 		},
+		// onMetadataChange
+		func(req api.MetadataChangeRequest) error {
+			logger.Info("Received change metadata request via API")
+
+			if req.Fingerprint != nil {
+				o.SetFingerprint(req.Fingerprint)
+			}
+
+			if req.Postures != nil {
+				o.SetPostures(req.Postures)
+			}
+
+			return nil
+		},
 		// onDisconnect
 		func() error {
 			logger.Info("Processing disconnect request via API")
@@ -404,6 +424,19 @@ func (o *Olm) StartTunnel(config TunnelConfig) {
 		}
 	})
 
+	fingerprint := config.InitialFingerprint
+	if fingerprint == nil {
+		fingerprint = make(map[string]any)
+	}
+
+	postures := config.InitialPostures
+	if postures == nil {
+		postures = make(map[string]any)
+	}
+
+	o.SetFingerprint(fingerprint)
+	o.SetPostures(postures)
+
 	// Connect to the WebSocket server
 	if err := olmClient.Connect(); err != nil {
 		logger.Error("Failed to connect to server: %v", err)
@@ -577,28 +610,16 @@ func (o *Olm) SwitchOrg(orgID string) error {
 	return nil
 }
 
-func (o *Olm) AddDevice(fd uint32) error {
-	if o.middleDev == nil {
-		return fmt.Errorf("middle device is not initialized")
-	}
+func (o *Olm) SetFingerprint(data map[string]any) {
+	o.metaMu.Lock()
+	defer o.metaMu.Unlock()
 
-	if o.tunnelConfig.MTU == 0 {
-		return fmt.Errorf("tunnel MTU is not set")
-	}
-
-	tdev, err := olmDevice.CreateTUNFromFD(fd, o.tunnelConfig.MTU)
-	if err != nil {
-		return fmt.Errorf("failed to create TUN device from fd: %v", err)
-	}
-
-	// Update interface name if available
-	if realInterfaceName, err2 := tdev.Name(); err2 == nil {
-		o.tunnelConfig.InterfaceName = realInterfaceName
-	}
-
-	// Replace the existing TUN device in the middle device with the new one
-	o.middleDev.AddDevice(tdev)
-
-	logger.Info("Added device from file descriptor %d", fd)
-	return nil
+	o.fingerprint = data
+}
+
+func (o *Olm) SetPostures(data map[string]any) {
+	o.metaMu.Lock()
+	defer o.metaMu.Unlock()
+
+	o.postures = data
 }

olm/types.go

@@ -67,5 +67,8 @@ type TunnelConfig struct {
 	OverrideDNS bool
 	TunnelDNS   bool
 
+	InitialFingerprint map[string]any
+	InitialPostures    map[string]any
+
 	DisableRelay bool
 }