feat: split udp protocol to folder p2p

gold/p2p/define.go

@@ -0,0 +1,40 @@
+package p2p
+
+import (
+	"errors"
+	"fmt"
+	"io"
+
+	"github.com/RomiChan/syncx"
+)
+
+type Initializer func(endpoint string, configs ...any) EndPoint
+
+var factory syncx.Map[string, Initializer]
+
+func Register(network string, initializer Initializer) (actual Initializer, hasexist bool) {
+	return factory.LoadOrStore(network, initializer)
+}
+
+type EndPoint interface {
+	fmt.Stringer
+	Network() string
+	Euqal(EndPoint) bool
+	Listen() (Conn, error)
+}
+
+func NewEndPoint(network, endpoint string, configs ...any) (EndPoint, error) {
+	initializer, ok := factory.Load(network)
+	if !ok {
+		return nil, errors.New("network " + network + " not found")
+	}
+	return initializer(endpoint, configs...), nil
+}
+
+type Conn interface {
+	io.Closer
+	fmt.Stringer // basically, the local address string
+	LocalAddr() EndPoint
+	ReadFromPeer([]byte) (int, EndPoint, error)
+	WriteToPeer([]byte, EndPoint) (int, error)
+}