RefactorHEADmaster

1 files changed, 71 insertions, 0 deletions

diff --git a/forged/internal/incoming/lmtp/lmtp.go b/forged/internal/incoming/lmtp/lmtp.go
new file mode 100644
index 0000000..c8918f8
--- /dev/null
+++ b/forged/internal/incoming/lmtp/lmtp.go
@@ -0,0 +1,71 @@
+package lmtp
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"time"
+
+	"go.lindenii.runxiyu.org/forge/forged/internal/common/misc"
+	"go.lindenii.runxiyu.org/forge/forged/internal/global"
+)
+
+type Server struct {
+	socket       string
+	domain       string
+	maxSize      int64
+	writeTimeout uint32
+	readTimeout  uint32
+	global       *global.Global
+}
+
+func New(global *global.Global) (server *Server) {
+	cfg := global.Config.LMTP
+	return &Server{
+		socket:       cfg.Socket,
+		domain:       cfg.Domain,
+		maxSize:      cfg.MaxSize,
+		writeTimeout: cfg.WriteTimeout,
+		readTimeout:  cfg.ReadTimeout,
+		global:       global,
+	}
+}
+
+func (server *Server) Run(ctx context.Context) error {
+	listener, _, err := misc.ListenUnixSocket(ctx, server.socket)
+	if err != nil {
+		return fmt.Errorf("listen unix socket for LMTP: %w", err)
+	}
+	defer func() {
+		_ = listener.Close()
+	}()
+
+	stop := context.AfterFunc(ctx, func() {
+		_ = listener.Close()
+	})
+	defer stop()
+
+	for {
+		conn, err := listener.Accept()
+		if err != nil {
+			if errors.Is(err, net.ErrClosed) || ctx.Err() != nil {
+				return nil
+			}
+			return fmt.Errorf("accept conn: %w", err)
+		}
+
+		go server.handleConn(ctx, conn)
+	}
+}
+
+func (server *Server) handleConn(ctx context.Context, conn net.Conn) {
+	defer func() {
+		_ = conn.Close()
+	}()
+	unblock := context.AfterFunc(ctx, func() {
+		_ = conn.SetDeadline(time.Now())
+		_ = conn.Close()
+	})
+	defer unblock()
+}