struct tcp_PCB {/** common PCB members */ IP_PCB;/** protocol specific PCB members */ TCP_PCB_COMMON(struct tcp_pcb); /* ports are in host byte order */ u16_t remote_port; u8_t flags;#define TF_ACK_DELAY ((u8_t)0x01U) /* Delayed ACK. */#define TF_ACK_NOW ((u8_t)0x...