how to reinitialise tcp connection to new ip in running state.

Hi all,

      i am using tm4c129 controller. I have written code of tcp master as bellow.

A)

/* initiasliastion */

then

 pcb= tcp_new();

tcp_bind(pcb,IO_ADDR)ANY,PORT);

pcb= tcp_listen(pcb);

tcp_accept(pcb, accept);

   now i want to change my ip (master ip)

so i call function as:

B)

tcp_arg(pcb,NULL);

tcp_sent(pcb,NULL);

tcp_receive(pcb,NULL);

tcp_close(pcb);

C)

 after this i called :

lwIPNetworkConfigChange(new_ip, new_subnetmask,0,IPADDR_USE_STATIC);

then again:

 pcb= tcp_new();

tcp_bind(pcb,IO_ADDR)ANY,PORT);

pcb= tcp_listen(pcb);

tcp_accept(pcb, accept);

But i found that after some time 10 sec my entire application get hanged. what is problem in new ip config or in freeing old pcb struct?

Regards,

Sagar