tcp mux and stuff

tcp-mux-client.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"encoding/binary"
+	"io"
+	"net"
+	"time"
+)
+
+type Client struct {
+	*TCPClientMux
+}
+
+func Dial(address string) (*Client, error) {
+	conn, err := net.Dial("tcp", address)
+	if err != nil {
+		return nil, err
+	}
+	client := &Client{
+		TCPClientMux: NewTCPClientMux(conn),
+	}
+	return client, nil
+}
+
+func (c *Client) Close() {
+	c.Conn.Close()
+}
+
+type TCPClientMux struct {
+	net.Conn
+	*PacketQueue
+}
+
+func NewTCPClientMux(connection net.Conn) *TCPClientMux {
+	return &TCPClientMux{
+		Conn:        connection,
+		PacketQueue: NewPacketQueue(connection),
+	}
+}
+
+func (m *TCPClientMux) Close() {
+	m.Conn.Close()
+}
+
+func (m *TCPClientMux) SendPacket(messageType uint16, data []byte) error {
+	err := binary.Write(m.Conn, binary.LittleEndian, Packet{
+		Version:     1,
+		MessageType: messageType,
+		DataLength:  uint16(len(data)),
+	})
+	if err != nil {
+		return err
+	}
+	_, err = m.Conn.Write(data)
+	return err
+}
+
+func (m *TCPClientMux) SendPacketFn(messageType uint16, datafn func(w io.Writer) error) error {
+	data, err := GetData(datafn)
+	if err != nil {
+		return err
+	}
+	return m.SendPacket(messageType, data)
+}
+
+func (m *TCPClientMux) Call(messageType uint16, responseType uint16, data []byte) ([]byte, error) {
+	err := m.SendPacket(messageType, data)
+	if err != nil {
+		return nil, err
+	}
+	packet, err := m.Expect(responseType, time.Second)
+	if err != nil {
+		return nil, err
+	}
+	return packet.Data, nil
+}