Make api availble over socket

Former-commit-id: e464af5302

api/api.go

@@ -0,0 +1,257 @@
+package api
+
+import (
+	"encoding/json"
+	"fmt"
+	"net"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/fosrl/newt/logger"
+)
+
+// ConnectionRequest defines the structure for an incoming connection request
+type ConnectionRequest struct {
+	ID       string `json:"id"`
+	Secret   string `json:"secret"`
+	Endpoint string `json:"endpoint"`
+}
+
+// PeerStatus represents the status of a peer connection
+type PeerStatus struct {
+	SiteID    int           `json:"siteId"`
+	Connected bool          `json:"connected"`
+	RTT       time.Duration `json:"rtt"`
+	LastSeen  time.Time     `json:"lastSeen"`
+	Endpoint  string        `json:"endpoint,omitempty"`
+	IsRelay   bool          `json:"isRelay"`
+}
+
+// StatusResponse is returned by the status endpoint
+type StatusResponse struct {
+	Status       string              `json:"status"`
+	Connected    bool                `json:"connected"`
+	TunnelIP     string              `json:"tunnelIP,omitempty"`
+	Version      string              `json:"version,omitempty"`
+	PeerStatuses map[int]*PeerStatus `json:"peers,omitempty"`
+}
+
+// API represents the HTTP server and its state
+type API struct {
+	addr           string
+	socketPath     string
+	listener       net.Listener
+	server         *http.Server
+	connectionChan chan ConnectionRequest
+	statusMu       sync.RWMutex
+	peerStatuses   map[int]*PeerStatus
+	connectedAt    time.Time
+	isConnected    bool
+	tunnelIP       string
+	version        string
+}
+
+// NewAPI creates a new HTTP server that listens on a TCP address
+func NewAPI(addr string) *API {
+	s := &API{
+		addr:           addr,
+		connectionChan: make(chan ConnectionRequest, 1),
+		peerStatuses:   make(map[int]*PeerStatus),
+	}
+
+	return s
+}
+
+// NewAPISocket creates a new HTTP server that listens on a Unix socket or Windows named pipe
+func NewAPISocket(socketPath string) *API {
+	s := &API{
+		socketPath:     socketPath,
+		connectionChan: make(chan ConnectionRequest, 1),
+		peerStatuses:   make(map[int]*PeerStatus),
+	}
+
+	return s
+}
+
+// Start starts the HTTP server
+func (s *API) Start() error {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/connect", s.handleConnect)
+	mux.HandleFunc("/status", s.handleStatus)
+
+	s.server = &http.Server{
+		Handler: mux,
+	}
+
+	var err error
+	if s.socketPath != "" {
+		// Use platform-specific socket listener
+		s.listener, err = createSocketListener(s.socketPath)
+		if err != nil {
+			return fmt.Errorf("failed to create socket listener: %w", err)
+		}
+		logger.Info("Starting HTTP server on socket %s", s.socketPath)
+	} else {
+		// Use TCP listener
+		s.listener, err = net.Listen("tcp", s.addr)
+		if err != nil {
+			return fmt.Errorf("failed to create TCP listener: %w", err)
+		}
+		logger.Info("Starting HTTP server on %s", s.addr)
+	}
+
+	go func() {
+		if err := s.server.Serve(s.listener); err != nil && err != http.ErrServerClosed {
+			logger.Error("HTTP server error: %v", err)
+		}
+	}()
+
+	return nil
+}
+
+// Stop stops the HTTP server
+func (s *API) Stop() error {
+	logger.Info("Stopping api server")
+
+	// Close the server first, which will also close the listener gracefully
+	if s.server != nil {
+		s.server.Close()
+	}
+
+	// Clean up socket file if using Unix socket
+	if s.socketPath != "" {
+		cleanupSocket(s.socketPath)
+	}
+
+	return nil
+}
+
+// GetConnectionChannel returns the channel for receiving connection requests
+func (s *API) GetConnectionChannel() <-chan ConnectionRequest {
+	return s.connectionChan
+}
+
+// UpdatePeerStatus updates the status of a peer including endpoint and relay info
+func (s *API) UpdatePeerStatus(siteID int, connected bool, rtt time.Duration, endpoint string, isRelay bool) {
+	s.statusMu.Lock()
+	defer s.statusMu.Unlock()
+
+	status, exists := s.peerStatuses[siteID]
+	if !exists {
+		status = &PeerStatus{
+			SiteID: siteID,
+		}
+		s.peerStatuses[siteID] = status
+	}
+
+	status.Connected = connected
+	status.RTT = rtt
+	status.LastSeen = time.Now()
+	status.Endpoint = endpoint
+	status.IsRelay = isRelay
+}
+
+// SetConnectionStatus sets the overall connection status
+func (s *API) SetConnectionStatus(isConnected bool) {
+	s.statusMu.Lock()
+	defer s.statusMu.Unlock()
+
+	s.isConnected = isConnected
+
+	if isConnected {
+		s.connectedAt = time.Now()
+	} else {
+		// Clear peer statuses when disconnected
+		s.peerStatuses = make(map[int]*PeerStatus)
+	}
+}
+
+// SetTunnelIP sets the tunnel IP address
+func (s *API) SetTunnelIP(tunnelIP string) {
+	s.statusMu.Lock()
+	defer s.statusMu.Unlock()
+	s.tunnelIP = tunnelIP
+}
+
+// SetVersion sets the olm version
+func (s *API) SetVersion(version string) {
+	s.statusMu.Lock()
+	defer s.statusMu.Unlock()
+	s.version = version
+}
+
+// UpdatePeerRelayStatus updates only the relay status of a peer
+func (s *API) UpdatePeerRelayStatus(siteID int, endpoint string, isRelay bool) {
+	s.statusMu.Lock()
+	defer s.statusMu.Unlock()
+
+	status, exists := s.peerStatuses[siteID]
+	if !exists {
+		status = &PeerStatus{
+			SiteID: siteID,
+		}
+		s.peerStatuses[siteID] = status
+	}
+
+	status.Endpoint = endpoint
+	status.IsRelay = isRelay
+}
+
+// handleConnect handles the /connect endpoint
+func (s *API) handleConnect(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	var req ConnectionRequest
+	decoder := json.NewDecoder(r.Body)
+	if err := decoder.Decode(&req); err != nil {
+		http.Error(w, fmt.Sprintf("Invalid request: %v", err), http.StatusBadRequest)
+		return
+	}
+
+	// Validate required fields
+	if req.ID == "" || req.Secret == "" || req.Endpoint == "" {
+		http.Error(w, "Missing required fields: id, secret, and endpoint must be provided", http.StatusBadRequest)
+		return
+	}
+
+	// Send the request to the main goroutine
+	s.connectionChan <- req
+
+	// Return a success response
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusAccepted)
+	json.NewEncoder(w).Encode(map[string]string{
+		"status": "connection request accepted",
+	})
+}
+
+// handleStatus handles the /status endpoint
+func (s *API) handleStatus(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodGet {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	s.statusMu.RLock()
+	defer s.statusMu.RUnlock()
+
+	resp := StatusResponse{
+		Connected:    s.isConnected,
+		TunnelIP:     s.tunnelIP,
+		Version:      s.version,
+		PeerStatuses: s.peerStatuses,
+	}
+
+	if s.isConnected {
+		resp.Status = "connected"
+	} else {
+		resp.Status = "disconnected"
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(resp)
+}

api/api_unix.go

@@ -0,0 +1,50 @@
+//go:build !windows
+// +build !windows
+
+package api
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"path/filepath"
+
+	"github.com/fosrl/newt/logger"
+)
+
+// createSocketListener creates a Unix domain socket listener
+func createSocketListener(socketPath string) (net.Listener, error) {
+	// Ensure the directory exists
+	dir := filepath.Dir(socketPath)
+	if err := os.MkdirAll(dir, 0755); err != nil {
+		return nil, fmt.Errorf("failed to create socket directory: %w", err)
+	}
+
+	// Remove existing socket file if it exists
+	if err := os.RemoveAll(socketPath); err != nil {
+		return nil, fmt.Errorf("failed to remove existing socket: %w", err)
+	}
+
+	listener, err := net.Listen("unix", socketPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to listen on Unix socket: %w", err)
+	}
+
+	// Set socket permissions to allow access
+	if err := os.Chmod(socketPath, 0666); err != nil {
+		listener.Close()
+		return nil, fmt.Errorf("failed to set socket permissions: %w", err)
+	}
+
+	logger.Debug("Created Unix socket at %s", socketPath)
+	return listener, nil
+}
+
+// cleanupSocket removes the Unix socket file
+func cleanupSocket(socketPath string) {
+	if err := os.Remove(socketPath); err != nil && !os.IsNotExist(err) {
+		logger.Error("Failed to remove socket file %s: %v", socketPath, err)
+	} else {
+		logger.Debug("Removed Unix socket at %s", socketPath)
+	}
+}

api/api_windows.go

@@ -0,0 +1,41 @@
+//go:build windows
+// +build windows
+
+package api
+
+import (
+	"fmt"
+	"net"
+
+	"github.com/Microsoft/go-winio"
+	"github.com/fosrl/newt/logger"
+)
+
+// createSocketListener creates a Windows named pipe listener
+func createSocketListener(pipePath string) (net.Listener, error) {
+	// Ensure the pipe path has the correct format
+	if pipePath[0] != '\\' {
+		pipePath = `\\.\pipe\` + pipePath
+	}
+
+	// Create a pipe configuration that allows everyone to write
+	config := &winio.PipeConfig{
+		// Set security descriptor to allow everyone full access
+		// This SDDL string grants full access to Everyone (WD) and to the current owner (OW)
+		SecurityDescriptor: "D:(A;;GA;;;WD)(A;;GA;;;OW)",
+	}
+
+	// Create a named pipe listener using go-winio with the configuration
+	listener, err := winio.ListenPipe(pipePath, config)
+	if err != nil {
+		return nil, fmt.Errorf("failed to listen on named pipe: %w", err)
+	}
+
+	logger.Debug("Created named pipe at %s with write access for everyone", pipePath)
+	return listener, nil
+}
+
+// cleanupSocket is a no-op on Windows as named pipes are automatically cleaned up
+func cleanupSocket(pipePath string) {
+	logger.Debug("Named pipe %s will be automatically cleaned up", pipePath)
+}