add tcpclient to aid debugging

examples/stackbasic/main.go

@@ -49,7 +49,11 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-
+	// h := &handler.H
+	// _ = h.AwaitingSynAck()
+	// _ = h.AwaitingSynResponse()
+	// _ = h.AwaitingSynSend()
+	// _ = h
 	err = handler.OpenListen(addrPort.Port(), iss)
 	if err != nil {
 		log.Fatal(err)
@@ -57,7 +61,7 @@ func main() {
 
 	tap := ltesto.NewHTTPTapClient("http://127.0.0.1:7070")
 	defer tap.Close()
-
+	tap.ReadDiscard() // Discard all unread content.
 	fmt.Println("hosting server at ", addrPort.String())
 	var buf [mtu]byte
 	var hdr httpraw.Header
@@ -68,6 +72,7 @@ func main() {
 			log.Fatal(err)
 		} else if nread > 0 {
 			debugEthPacket(nil, "IN ", buf[:nread])
+			fmt.Println("INHEX ", debugHex(buf[:nread]))
 			err = lStack.RecvEth(buf[:nread])
 			if err != nil {
 				slogger.error("recv", slog.String("err", err.Error()), slog.Int("plen", nread))
@@ -78,6 +83,7 @@ func main() {
 		if err != nil {
 			slogger.error("handle", slog.String("err", err.Error()))
 		} else if nw > 0 {
+			fmt.Println("OUTHEX ", debugHex(buf[:nread]))
 			_, err = tap.Write(buf[:nw])
 			if err != nil {
 				log.Fatal(err)
@@ -326,3 +332,15 @@ func debugEthPacket(logger *slog.Logger, prefix string, b []byte) {
 		fmt.Println("PAYLOAD:", string(payload))
 	}
 }
+
+func debugHex(b []byte) string {
+	var d []byte
+	for i := 0; i < len(b); i++ {
+		c1 := tblhex[b[i]&0xf]
+		c2 := tblhex[b[i]>>4]
+		d = append(d, c2, c1, ' ')
+	}
+	return string(d)
+}
+
+const tblhex = "0123456789abcdef"

examples/tcpclient/main.go

@@ -0,0 +1,43 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"os"
+
+	"github.com/soypat/lneto/http/httpraw"
+)
+
+func main() {
+	if err := run(); err != nil {
+		fmt.Println(err)
+		os.Exit(1)
+	}
+	fmt.Println("DONE")
+}
+
+func run() error {
+	fmt.Println("dialing...")
+	conn, err := net.DialTCP("tcp4", &net.TCPAddr{IP: []byte{192, 168, 10, 1}, Port: 1337}, &net.TCPAddr{IP: []byte{192, 168, 10, 2}, Port: 80})
+	if err != nil {
+		return err
+	}
+	fmt.Println("reading...")
+	var hdr httpraw.Header
+	for {
+		_, err = hdr.ReadFromLimited(conn, 1024)
+		if err != nil {
+			return err
+		}
+		const asRequest = false
+		var ok bool
+		ok, err = hdr.TryParse(asRequest)
+		if ok {
+			break
+		} else if err != nil {
+			return err
+		}
+	}
+	fmt.Println("got HTTP:\n", hdr.String())
+	return nil
+}

internet/tcpconn.go

@@ -21,6 +21,7 @@ var (
 )
 
 type TCPConn struct {
+	// deprecated: here for debugging purposes only.
 	h          tcp.Handler
 	remoteAddr []byte