[lwip-users] unsent segments chain a loop?!

[Fabian Koch]

Hey all,

I have a bug report where someone reports
that the following section in tcp_out.c has led to an endless loop:

In 1.3.2, line 550, in 1.4.1, line 934:

  /*
useg should point to last segment on unacked queue */
  useg = pcb->unacked;
  if
(useg != NULL) {
    for
(; useg->next != NULL; useg = useg->next);
  }

is it possible that useg->next loops
back to useg?

kind regards,
Fabian