优化项目机构和服务端协程控制逻辑

server/mnt/service.go

@@ -0,0 +1,62 @@
+package mnt
+
+import (
+	"context"
+	"encoding/hex"
+	"log/slog"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/pcap"
+	"github.com/pkg/errors"
+)
+
+func Start(ctx context.Context, errCh chan error) {
+
+	// 打开一个网络接口
+	device, err := pcap.OpenLive("WLAN", 1600, true, pcap.BlockForever)
+	if err != nil {
+		b, er := hex.DecodeString("\\xbb")
+		slog.Debug("b", b, er)
+		errCh <- errors.Wrap(err, "打开网络接口失败")
+		return
+	}
+	defer device.Close()
+
+	err = device.SetBPFFilter("tcp")
+	if err != nil {
+		errCh <- errors.Wrap(err, "设置 BPF 过滤器失败")
+		return
+	}
+
+	err = device.SetDirection(pcap.DirectionIn)
+	if err != nil {
+		errCh <- errors.Wrap(err, "设置捕获方向失败")
+		return
+	}
+
+	// 创建一个数据包源
+	source := gopacket.NewPacketSource(device, device.LinkType())
+	source.NoCopy = true
+	source.Lazy = true
+
+	for {
+		select {
+		case <-ctx.Done():
+			slog.Debug("monitor 被动结束")
+			errCh <- nil
+			return
+
+		case packet := <-source.Packets():
+			handle(packet)
+		}
+	}
+}
+
+func handle(packet gopacket.Packet) {
+	slog.Debug("Packet: ", packet)
+	slog.Debug("Layers: ", packet.Layers())
+	slog.Debug("Application: ", packet.ApplicationLayer())
+	slog.Debug("Transport: ", packet.TransportLayer())
+	slog.Debug("Network: ", packet.NetworkLayer())
+	slog.Debug("Link: ", packet.LinkLayer())
+}