add example server

example/main.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"net"
+
+	"github.com/lucas-clemente/quic-go"
+	"github.com/lucas-clemente/quic-go/crypto"
+)
+
+func main() {
+	addr, err := net.ResolveUDPAddr("udp", "localhost:6121")
+	if err != nil {
+		panic(err)
+	}
+
+	conn, err := net.ListenUDP("udp", addr)
+	if err != nil {
+		panic(err)
+	}
+
+	data := make([]byte, 0x10000)
+	n, remoteAddr, err := conn.ReadFromUDP(data)
+	if err != nil {
+		panic(err)
+	}
+	data = data[:n]
+	r := bytes.NewReader(data)
+
+	fmt.Printf("Number of bytes: %d\n", n)
+	fmt.Printf("Remote addr: %v\n", remoteAddr)
+
+	publicHeader, err := quic.ParsePublicHeader(r)
+	if err != nil {
+		panic(err)
+	}
+
+	if publicHeader.VersionFlag && publicHeader.QuicVersion != 0x51303330 {
+		panic("only version Q030 supported")
+	}
+
+	nullAEAD := &crypto.NullAEAD{}
+	r, err = nullAEAD.Open(data[0:int(r.Size())-r.Len()], r)
+	if err != nil {
+		panic(err)
+	}
+
+	privateFlag, err := r.ReadByte()
+	if err != nil {
+		panic(err)
+	}
+
+	if privateFlag&0x02 > 0 || privateFlag&0x04 > 0 {
+		panic(errors.New("FEC packets are not implemented"))
+	}
+
+	frame, err := quic.ParseStreamFrame(r)
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Printf("%s\n", string(frame.Data[0:4]))
+}