| lwIP
    2.0.3
    Lightweight IP stack | 
#include <tcp.h>
| Data Fields | |
| ip_addr_t | local_ip | 
| struct tcp_pcb * | next | 
the TCP protocol control block
| ip_addr_t tcp_pcb::local_ip | 
common PCB members
| struct tcp_pcb* tcp_pcb::next | 
protocol specific PCB members