16 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);
17 extern bool TCP_Pkt_Check(size_t len, const void *data, size_t *ofs, int AF, const void *IP, short sport, short dport, uint8_t flags);