使用logger尝试控制日志输出级别

cmd/netstack/main.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"log"
 	"net"
-	"netstack/logger"
 	"netstack/tcpip"
 	"netstack/tcpip/link/fdbased"
 	"netstack/tcpip/link/tuntap"
@@ -123,24 +122,6 @@ func main() {
 		},
 	})
 
-	//go func() { // echo server
-	//	// 监听udp localPort端口
-	//	conn := udpListen(s, proto, addr, localPort)
-
-	//	for {
-	//		buf := make([]byte, 1024)
-	//		n, err := conn.Read(buf)
-	//		if err != nil {
-	//			log.Println(err)
-	//			break
-	//		}
-	//		log.Println("接收到数据", string(buf[:n]))
-	//		conn.Write([]byte("server echo"))
-	//	}
-	//	// 关闭监听服务，此时会释放端口
-	//	conn.Close()
-	//}()
-
 	//logger.SetFlags(logger.TCP)
 	go func() { // echo server
 		listener := tcpListen(s, proto, addr, localPort)
@@ -152,9 +133,7 @@ func main() {
 		if _, err := conn.Read(buf); err != nil {
 			log.Fatal(err)
 		}
-		logger.GetInstance().Info(logger.TCP, func() {
 		fmt.Println(string(buf))
-		})
 		if string(buf) != "" {
 			conn.Write([]byte("Server echo"))
 		}

logger/logger.go

@@ -4,10 +4,23 @@ import (
 	"sync"
 )
 
+/*
+logger.GetInstance(IP|TCP)
+
+logger.GetInstance().Info(logger.IP, msg) // 会输出
+
+logger.GetInstance().Info(logger.UDP, msg) // 不会输出
+*/
+
 const (
-	IP = 1 << iota
+	// ETH 以太网
+	ETH = 1 << iota
+	IP
+	ARP
 	UDP
 	TCP
+	// HANDSHAKE 三次握手 四次挥手
+	HANDSHAKE
 )
 
 type logger struct {
@@ -32,16 +45,6 @@ func SetFlags(flags uint8) {
 	GetInstance().flags = flags
 }
 
-/*
-logger.GetInstance(IP|TCP)
-
-logger.GetInstance().Info(logger.IP, msg) // 会输出
-
-logger.GetInstance().Info(logger.UDP, msg) // 不会输出
-
-
-*/
-
 func (l *logger) Info(mask uint8, f func()) {
 	if mask&l.flags != 0 {
 		f()

tcpip/link/fdbased/endpoint.go

@@ -2,6 +2,7 @@ package fdbased
 
 import (
 	"log"
+	"netstack/logger"
 	"netstack/tcpip"
 	"netstack/tcpip/buffer"
 	"netstack/tcpip/header"
@@ -126,7 +127,9 @@ func (e *endpoint) WritePacket(r *stack.Route, hdr buffer.Prependable,
 		ethHdr.SrcAddr = e.addr // 说明这是一个原始报文
 	}
 	eth.Encode(ethHdr) // 将以太帧信息作为报文头编入
-	log.Println("链路层写回报文")
+	logger.GetInstance().Info(logger.ETH, func() {
+		log.Println("链路层写回以太报文")
+	})
 	// 写入网卡中
 	if payload.Size() == 0 {
 		return rawfile.NonBlockingWrite(e.fd, hdr.View())
@@ -203,7 +206,9 @@ func (e *endpoint) dispatch() (bool, *tcpip.Error) {
 
 	switch p {
 	case header.ARPProtocolNumber, header.IPv4ProtocolNumber:
+		logger.GetInstance().Info(logger.ETH, func() {
 			log.Println("链路层收到报文,来自: ", remoteLinkAddr, localLinkAddr)
+		})
 		e.dispatcher.DeliverNetworkPacket(e, remoteLinkAddr, localLinkAddr, p, vv)
 	case header.IPv6ProtocolNumber:
 		// TODO ipv6暂时不感兴趣

tcpip/network/fragmentation/fragmentation.go

@@ -2,6 +2,7 @@ package fragmentation
 
 import (
 	"log"
+	"netstack/logger"
 	"netstack/tcpip/buffer"
 	"sync"
 	"time"
@@ -71,7 +72,9 @@ func (f *Fragmentation) Process(id uint32, first, last uint16, more bool, vv buf
 
 	f.mu.Lock()
 	f.size += consumed
+	logger.GetInstance().Info(logger.IP, func() {
 		log.Printf("[%d]的分片 [%d,%d] 合并中\n", id, first, last)
+	})
 	if done {
 		f.release(r)
 	}

tcpip/network/ipv4/ipv4.go

@@ -111,11 +111,13 @@ func (e *endpoint) WritePacket(r *stack.Route, hdr buffer.Prependable, payload b
 	if protocol == header.ICMPv4ProtocolNumber {
 		log.Println("IP 写回ICMP报文", header.IPv4(append(ip, payload.ToView()...)))
 	} else {
+		logger.GetInstance().Info(logger.IP, func() {
 			if payload.Size() == 0 {
-			log.Printf("send ipv4 packet %d bytes, proto: 0x%x", hdr.UsedLength()+payload.Size(), protocol)
+				log.Printf("发送 IP 报文 %d bytes", hdr.UsedLength()+payload.Size())
 			} else {
 				log.Println(header.IPv4(append(ip, payload.ToView()...)))
 			}
+		})
 	}
 	return e.linkEP.WritePacket(r, hdr, payload, ProtocolNumber)
 }
@@ -162,7 +164,9 @@ func (e *endpoint) HandlePacket(r *stack.Route, vv buffer.VectorisedView) {
 	}
 	r.Stats().IP.PacketsDelivered.Increment()
 	// 根据协议分发到不同处理函数，比如协议时TCP，会进入tcp.HandlePacket
+	logger.GetInstance().Info(logger.IP, func() {
 		log.Printf("准备前往 UDP/TCP recv ipv4 packet %d bytes, proto: 0x%x", tlen, p)
+	})
 	e.dispatcher.DeliverTransportPacket(r, p, vv)
 }
 

tcpip/stack/linkaddrcache.go

@@ -20,6 +20,7 @@ import (
 	"sync"
 	"time"
 
+	"netstack/logger"
 	"netstack/sleep"
 	"netstack/tcpip"
 )
@@ -149,7 +150,9 @@ func (e *linkAddrEntry) removeWaker(w *sleep.Waker) {
 
 // add adds a k -> v mapping to the cache.
 func (c *linkAddrCache) add(k tcpip.FullAddress, v tcpip.LinkAddress) {
+	logger.GetInstance().Info(logger.ETH, func() {
 		log.Printf("add link cache: %v-%v", k, v)
+	})
 	c.mu.Lock()
 	defer c.mu.Unlock()
 
@@ -203,7 +206,9 @@ func (c *linkAddrCache) makeAndAddEntry(k tcpip.FullAddress, v tcpip.LinkAddress
 // get reports any known link address for k.
 func (c *linkAddrCache) get(k tcpip.FullAddress, linkRes LinkAddressResolver,
 	localAddr tcpip.Address, linkEP LinkEndpoint, waker *sleep.Waker) (tcpip.LinkAddress, <-chan struct{}, *tcpip.Error) {
+	logger.GetInstance().Info(logger.ETH, func() {
 		log.Println("在arp本地缓存中寻找", k)
+	})
 	if linkRes != nil {
 		if addr, ok := linkRes.ResolveStaticAddress(k.Addr); ok {
 			return addr, nil, nil

tcpip/stack/nic.go

@@ -3,6 +3,7 @@ package stack
 import (
 	"log"
 	"netstack/ilist"
+	"netstack/logger"
 	"netstack/tcpip"
 	"netstack/tcpip/buffer"
 	"netstack/tcpip/header"
@@ -92,7 +93,6 @@ func (n *NIC) addAddressLocked(protocol tcpip.NetworkProtocolNumber, addr tcpip.
 	peb PrimaryEndpointBehavior, replace bool) (*referencedNetworkEndpoint, *tcpip.Error) {
 	netProto, ok := n.stack.networkProtocols[protocol]
 	if !ok {
-		log.Println("添加失败")
 		return nil, tcpip.ErrUnknownProtocol
 	}
 
@@ -101,7 +101,9 @@ func (n *NIC) addAddressLocked(protocol tcpip.NetworkProtocolNumber, addr tcpip.
 	if err != nil {
 		return nil, err
 	}
+	logger.GetInstance().Info(logger.IP, func() {
 		log.Printf("基于[%d]协议 为 #%d 网卡 添加网络层实现 并绑定地址到: %s\n", netProto.Number(), n.id, ep.ID().LocalAddress)
+	})
 
 	// 获取网络层端的id 其实就是ip地址
 	id := *ep.ID()
@@ -340,19 +342,23 @@ func (n *NIC) DeliverNetworkPacket(linkEP LinkEndpoint, remoteLinkAddr, localLin
 		return
 	}
 	src, dst := netProto.ParseAddresses(vv.First())
+	logger.GetInstance().Info(logger.ETH, func() {
 		log.Printf("网卡[%v]准备从 [%s] 向 [%s] 分发数据: %v\n", linkEP.LinkAddress(), src, dst, func() []byte {
 			if len(vv.ToView()) > 64 {
 				return vv.ToView()[:64]
 			}
 			return vv.ToView()
 		}())
+	})
 	// 根据网络协议和数据包的目的地址，找到网络端
 	// 然后将数据包分发给网络层
 	if ref := n.getRef(protocol, dst); ref != nil {
 		r := makeRoute(protocol, dst, src, linkEP.LinkAddress(), ref)
 		r.RemoteLinkAddress = remoteLinkAddr
+		logger.GetInstance().Info(logger.ETH, func() {
 			log.Println("准备前往 IP 将本地和远端的MAC、IP 保存在路由中 以便协议栈使用",
 				r.LocalLinkAddress, r.RemoteLinkAddress, r.LocalAddress, r.RemoteAddress)
+		})
 		ref.ep.HandlePacket(&r, vv)
 		ref.decRef()
 		return
@@ -396,7 +402,9 @@ func (n *NIC) getRef(protocol tcpip.NetworkProtocolNumber, dst tcpip.Address) *r
 
 	n.mu.RLock()
 	if ref, ok := n.endpoints[id]; ok && ref.tryIncRef() {
+		logger.GetInstance().Info(logger.IP, func() {
 			log.Println("找到了目标网络端(绑定过的IP): ", id.LocalAddress)
+		})
 		n.mu.RUnlock()
 		return ref
 	}
@@ -453,7 +461,9 @@ func (n *NIC) DeliverTransportPacket(r *Route, protocol tcpip.TransportProtocolN
 		n.stack.stats.MalformedRcvdPackets.Increment()
 		return
 	}
+	logger.GetInstance().Info(logger.IP, func() {
 		log.Println("网卡准备分发传输层数据报", n.stack.transportProtocols, srcPort, dstPort)
+	})
 	id := TransportEndpointID{dstPort, r.LocalAddress, srcPort, r.RemoteAddress}
 	// 调用分流器，根据传输层协议和传输层id分发数据报文
 	if n.demux.deliverPacket(r, protocol, vv, id) {
@@ -484,6 +494,7 @@ func (n *NIC) DeliverTransportControlPacket(local, remote tcpip.Address, net tcp
 
 }
 
+// ID 网卡的标识号
 func (n *NIC) ID() tcpip.NICID {
 	return n.id
 }

tcpip/stack/stack.go

@@ -2,6 +2,7 @@ package stack
 
 import (
 	"log"
+	"netstack/logger"
 	"netstack/sleep"
 	"netstack/tcpip"
 	"netstack/tcpip/buffer"
@@ -389,7 +390,9 @@ func (s *Stack) FindRoute(id tcpip.NICID, localAddr, remoteAddr tcpip.Address,
 
 		r := makeRoute(netProto, ref.ep.ID().LocalAddress, remoteAddr, nic.linkEP.LinkAddress(), ref)
 		r.NextHop = s.routeTable[i].Gateway
+		logger.GetInstance().Info(logger.IP, func() {
 			log.Println(r.LocalLinkAddress, r.LocalAddress, r.RemoteLinkAddress, r.RemoteAddress, r.NextHop)
+		})
 		return r, nil
 	}
 
@@ -466,7 +469,9 @@ func (s *Stack) RemoveWaker(nicid tcpip.NICID, addr tcpip.Address, waker *sleep.
 // 最终调用 demuxer.registerEndpoint 函数来实现注册。
 func (s *Stack) RegisterTransportEndpoint(nicID tcpip.NICID, netProtos []tcpip.NetworkProtocolNumber,
 	protocol tcpip.TransportProtocolNumber, id TransportEndpointID, ep TransportEndpoint) *tcpip.Error {
+	logger.GetInstance().Info(logger.UDP|logger.TCP, func() {
 		log.Println("往", nicID, "网卡注册新的传输端")
+	})
 	if nicID == 0 {
 		return s.demux.registerEndpoint(netProtos, protocol, id, ep) // 给协议栈的所有网卡注册传输端
 	}