you can dial connection with timeout, and the PingAndList at /bot also.

bot/pinglist.go

@@ -0,0 +1,94 @@
+package bot
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/Tnze/go-mc/net"
+	pk "github.com/Tnze/go-mc/net/packet"
+)
+
+// PingAndList check server status and list online player.
+// Returns a JSON data with server status, and the delay.
+//
+// For more information for JSON format, see https://wiki.vg/Server_List_Ping#Response
+func PingAndList(addr string, port int) ([]byte, time.Duration, error) {
+	conn, err := net.DialMC(fmt.Sprintf("%s:%d", addr, port))
+	if err != nil {
+		return nil, 0, fmt.Errorf("bot: dial fail: %v", err)
+	}
+	return pingAndList(addr, port, conn)
+}
+
+// PingAndListTimeout PingAndLIstTimeout is the version of PingAndList with max request time.
+func PingAndListTimeout(addr string, port int, timeout time.Duration) ([]byte, time.Duration, error) {
+	deadLine := time.Now().Add(timeout)
+
+	conn, err := net.DialMCTimeout(fmt.Sprintf("%s:%d", addr, port), timeout)
+	if err != nil {
+		return nil, 0, fmt.Errorf("bot: dial fail: %v", err)
+	}
+
+	err = conn.Socket.SetDeadline(deadLine)
+	if err != nil {
+		return nil, 0, fmt.Errorf("bot: set deadline fail: %v", err)
+	}
+
+	return pingAndList(addr, port, conn)
+}
+
+func pingAndList(addr string, port int, conn *net.Conn) ([]byte, time.Duration, error) {
+	//握手
+	err := conn.WritePacket(
+		//Handshake Packet
+		pk.Marshal(
+			0x00,                       //Handshake packet ID
+			pk.VarInt(ProtocolVersion), //Protocol version
+			pk.String(addr),            //Server's address
+			pk.UnsignedShort(port),
+			pk.Byte(1),
+		))
+	if err != nil {
+		return nil, 0, fmt.Errorf("bot: send handshake packect fail: %v", err)
+	}
+
+	//LIST
+	//请求服务器状态
+	err = conn.WritePacket(pk.Marshal(0))
+	if err != nil {
+		return nil, 0, fmt.Errorf("bot: send list packect fail: %v", err)
+	}
+
+	//服务器返回状态
+	recv, err := conn.ReadPacket()
+	if err != nil {
+		return nil, 0, fmt.Errorf("bot: recv list packect fail: %v", err)
+	}
+	var s pk.String
+	err = recv.Scan(&s)
+	if err != nil {
+		return nil, 0, fmt.Errorf("bot: scan list packect fail: %v", err)
+	}
+
+	//PING
+	startTime := time.Now()
+	err = conn.WritePacket(pk.Marshal(0x01, pk.Long(startTime.Unix())))
+	if err != nil {
+		return nil, 0, fmt.Errorf("bot: send ping packect fail: %v", err)
+	}
+
+	recv, err = conn.ReadPacket()
+	if err != nil {
+		return nil, 0, fmt.Errorf("bot: recv pong packect fail: %v", err)
+	}
+	var t pk.Long
+	err = recv.Scan(&t)
+	if err != nil {
+		return nil, 0, fmt.Errorf("bot: scan pong packect fail: %v", err)
+	}
+	if t != pk.Long(startTime.Unix()) {
+		return nil, 0, fmt.Errorf("bot: pong packect no match: %v", err)
+	}
+
+	return []byte(s), time.Since(startTime), err
+}