tcp报文头结构可视化解析;优化IP udp报文的可视化解析

tcpip/transport/tcp/segment.go

@@ -0,0 +1,45 @@
+package tcp
+
+import (
+	"log"
+	"netstack/tcpip/buffer"
+	"netstack/tcpip/header"
+	"netstack/tcpip/stack"
+	"sync/atomic"
+)
+
+// tcp 太复杂了 专门写一个协议解析器
+
+// segment 表示一个 TCP 段。它保存有效负载和解析的 TCP 段信息，并且可以添加到侵入列表中
+type segment struct {
+	segmentEntry
+	refCnt int32
+	id     stack.TransportEndpointID
+	route  stack.Route
+	data   buffer.VectorisedView
+	// views is used as buffer for data when its length is large
+	// enough to store a VectorisedView.
+	views [8]buffer.View
+	// TODO 需要添加
+}
+
+func newSegment(r *stack.Route, id stack.TransportEndpointID, vv buffer.VectorisedView) *segment {
+	s := &segment{refCnt: 1, id: id, route: r.Clone()}
+	s.data = vv.Clone(s.views[:])
+	return s
+}
+
+func (s *segment) decRef() {
+	if atomic.AddInt32(&s.refCnt, -1) == 0 {
+		s.route.Release()
+	}
+}
+
+func (s *segment) incRef() {
+	atomic.AddInt32(&s.refCnt, 1)
+}
+
+func (s *segment) parse() bool {
+	log.Println(header.TCP(s.data.First()))
+	return false
+}