[lwip-devel] [bug #46685] pcb->accepts_pending is not decreased

[Joel Cunningham]

Follow-up Comment #6, bug #46685 (project lwip):

Actually the pcb returned from tcp_listen() is of type struct tcp_pcb_listen
*lpcb, but it has been casted.  Take a look at tcp_listen_with_backlog().  The
original pcb is transformed into type tcp_pcb_listen, which you can pass to
tcp_accepted()

Within APIs and code, listener PCBs are treated as a normal struct tcp_pcb
until looking at the state (LISTEN) at which point it is casted to the correct
type.  If you look at the tcp_accepted() macro, you can see it's expecting the
input PCB to be struct tcb_pcb because it performs its own casts

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