diff --git a/third_party/message/can_bus.go b/third_party/message/can_bus.go
index a59d659..25f4d7b 100644
--- a/third_party/message/can_bus.go
+++ b/third_party/message/can_bus.go
@@ -203,31 +203,40 @@ const (
 
 const (
 	CAN_CRC16_ATPREQ = 0x11021
+	CAN_CRC32        = 0x04C11DB7
 )
 
 var (
 	crc16AtpReqTable []uint32 = nil
+	crc32CanTable    []uint32 = nil
 )
 
 func CanCreateCrcTable() {
 	if crc16AtpReqTable == nil {
 		crc16AtpReqTable = CreateCrcTable(CAN_CRC16_ATPREQ, 16, false)
 	}
+	if crc32CanTable == nil {
+		crc32CanTable = CreateCrcTable(CAN_CRC32, 32, false)
+	}
 }
 func calculateAtpReqCrc16(data []byte) uint16 {
 	crc := CrcTableBased(data, 16, 0, false, false, 0, crc16AtpReqTable)
 	return uint16(crc)
 }
+func calculateCanCrc32(data []byte) uint32 {
+	crc := CrcTableBased(data, 32, 0xFF_FF_FF_FF, false, false, 0, crc32CanTable)
+	return crc
+}
 
 // CRC32A的校验范围是：报文+时间戳A
 func calculateDataRspCrc32A(data []byte) uint32 {
-	return 0
+	return calculateCanCrc32(data)
 }
 
 // CRC32B的校验范围是：报文+时间戳B
 func calculateDataRspCrc32B(data []byte) uint32 {
-	return 0
+	return calculateCanCrc32(data)
 }
 func calculateDataRspCrc32C(data []byte) uint32 {
-	return 0
+	return calculateCanCrc32(data)
 }
diff --git a/third_party/tcp/tcp_client.go b/third_party/tcp/tcp_client.go
deleted file mode 100644
index e81963f..0000000
--- a/third_party/tcp/tcp_client.go
+++ /dev/null
@@ -1,41 +0,0 @@
-package tcp
-
-import "net"
-
-type client struct {
-	laddr *net.TCPAddr //local address
-	raddr *net.TCPAddr //remote address
-	con   *net.TCPConn //tcp 连接
-}
-
-func (c *client) NewClientWithLocal(remoteAddr string, localAddr string) *client {
-	ra, raEr := net.ResolveTCPAddr("tcp", remoteAddr)
-	if raEr != nil {
-		panic(raEr)
-	}
-	c.raddr = ra
-	//
-	la, laEr := net.ResolveTCPAddr("tcp", localAddr)
-	if laEr != nil {
-		panic(laEr)
-	}
-	c.laddr = la
-	return c
-}
-func (c *client) NewClient(remoteAddr string) *client {
-	ra, raEr := net.ResolveTCPAddr("tcp", remoteAddr)
-	if raEr != nil {
-		panic(raEr)
-	}
-	c.raddr = ra
-	c.con.LocalAddr()
-	return c
-}
-func (c *client) Start() error {
-	con, e := net.DialTCP(c.raddr.Network(), c.laddr, c.raddr)
-	if e != nil {
-		return e
-	}
-	c.con = con
-	return nil
-}
diff --git a/third_party/tcp/tcp_server.go b/third_party/tcp/tcp_server.go
deleted file mode 100644
index 4ae52b7..0000000
--- a/third_party/tcp/tcp_server.go
+++ /dev/null
@@ -1 +0,0 @@
-package tcp