[lwip-users] problem in tcp_bind

[Taranowski, Thomas (SWCOE)]

I’m having a problem with my stack port, where I have some test code that is attempting to bind to a port.  I’m getting an access violation at an unexpected location, and am currently at a loss for what the cause could be.  Any pointers or ideas would be appreciated.  From what it looks like, the list of tcp_listen_pcbs has become corrupted somehow, but I don’t know of any likely candidates that would cause this.

 

Thanks!

 

err_t

tcp_bind(struct tcp_pcb *pcb, struct ip_addr *ipaddr, u16_t port)

{

  struct tcp_pcb *cpcb;

 

  if (port == 0) {

    port = tcp_new_port();

  }

  /* Check if the address already is in use. */

  /* Check the listen pcbs. */

  for(cpcb = (struct tcp_pcb *)tcp_listen_pcbs.pcbs;

      cpcb != NULL; cpcb = cpcb->next) {

    àif (cpcb->local_port == port) {ß Crashes here

      if (ip_addr_isany(&(cpcb->local_ip)) ||

          ip_addr_isany(ipaddr) ||

          ip_addr_cmp(&(cpcb->local_ip), ipaddr)) {

        return ERR_USE;

      }

    }

  }