mirror of
https://github.com/Mezeporta/Erupe.git
synced 2026-03-22 23:54:33 +01:00
7ef5efc549
Add a recording and replay foundation for the MHF network protocol. A RecordingConn decorator wraps network.Conn to transparently capture all decrypted packets to binary .mhfr files, with zero handler changes and zero overhead when disabled. - network/pcap: binary capture format (writer, reader, filters) - RecordingConn: thread-safe Conn decorator with direction tracking - CaptureOptions in config (disabled by default) - Capture wired into all three server types (sign, entrance, channel) - cmd/replay: CLI tool with dump, json, stats, and compare modes - 19 new tests, all passing with -race
125 lines
2.6 KiB
Go
125 lines
2.6 KiB
Go
package signserver
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import (
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"fmt"
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"io"
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"net"
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"sync"
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cfg "erupe-ce/config"
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"erupe-ce/network"
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"github.com/jmoiron/sqlx"
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"go.uber.org/zap"
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)
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// Config struct allows configuring the server.
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type Config struct {
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Logger *zap.Logger
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DB *sqlx.DB
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ErupeConfig *cfg.Config
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}
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// Server is a MHF sign server.
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type Server struct {
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sync.Mutex
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logger *zap.Logger
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erupeConfig *cfg.Config
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userRepo SignUserRepo
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charRepo SignCharacterRepo
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sessionRepo SignSessionRepo
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listener net.Listener
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isShuttingDown bool
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}
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// NewServer creates a new Server type.
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func NewServer(config *Config) *Server {
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s := &Server{
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logger: config.Logger,
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erupeConfig: config.ErupeConfig,
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}
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if config.DB != nil {
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s.userRepo = NewSignUserRepository(config.DB)
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s.charRepo = NewSignCharacterRepository(config.DB)
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s.sessionRepo = NewSignSessionRepository(config.DB)
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}
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return s
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}
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// Start starts the server in a new goroutine.
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func (s *Server) Start() error {
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l, err := net.Listen("tcp", fmt.Sprintf(":%d", s.erupeConfig.Sign.Port))
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if err != nil {
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return err
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}
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s.listener = l
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go s.acceptClients()
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return nil
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}
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// Shutdown exits the server gracefully.
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func (s *Server) Shutdown() {
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s.logger.Debug("Shutting down...")
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s.Lock()
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s.isShuttingDown = true
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s.Unlock()
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// This will cause the acceptor goroutine to error and exit gracefully.
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_ = s.listener.Close()
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}
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func (s *Server) acceptClients() {
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for {
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conn, err := s.listener.Accept()
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if err != nil {
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// Check if we are shutting down and exit gracefully if so.
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s.Lock()
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shutdown := s.isShuttingDown
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s.Unlock()
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if shutdown {
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break
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} else {
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s.logger.Warn("Error accepting client", zap.Error(err))
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continue
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}
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}
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go s.handleConnection(conn)
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}
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}
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func (s *Server) handleConnection(conn net.Conn) {
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s.logger.Debug("New connection", zap.String("RemoteAddr", conn.RemoteAddr().String()))
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defer func() { _ = conn.Close() }()
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// Client initalizes the connection with a one-time buffer of 8 NULL bytes.
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nullInit := make([]byte, 8)
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_, err := io.ReadFull(conn, nullInit)
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if err != nil {
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s.logger.Error("Error initializing connection", zap.Error(err))
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return
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}
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// Create a new session.
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var cc network.Conn = network.NewCryptConn(conn, s.erupeConfig.RealClientMode, s.logger)
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cc, captureCleanup := startSignCapture(s, cc, conn.RemoteAddr())
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session := &Session{
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logger: s.logger,
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server: s,
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rawConn: conn,
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cryptConn: cc,
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captureCleanup: captureCleanup,
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}
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// Do the session's work.
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session.work()
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if session.captureCleanup != nil {
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session.captureCleanup()
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}
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}
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