+extern void TCP_SendC(const tTCPConn *Conn, uint8_t flags, size_t data_len, const void *data);
+extern void TCP_Send(int IF, int AF, const void *IP, short sport, short dport, uint32_t seq, uint32_t ack, uint8_t flags, uint16_t window, size_t data_len, const void *data);