Re: [lwip-users] Bind fails after previous server-initiated connection close

Hi, This is normal BSD semantics of a TCP listener, use SO_REUSEADDR before calling bind to avoid the issue Joel > On Jun 8, 2017, at 4:18 PM, Ignacio García Pérez wrote: > > Hi All, > > I'm writing a simple FTP server that needs to be started up and shut down > with

Re: [lwip-users] Bind fails after previous server-initiated connection close

Ignacio García Pérez wrote: > I'm writing a simple FTP server that needs to be started up and shut down > with relatively high frequency (say once per minute) That's a strange application scenario. And the result of this is what you are seeing. > Question: > 1- Is this behaviour expected?

Re: [lwip-users] Bind fails after previous server-initiated connection close

According to major communications texts authors, due to parallel paths and some esoteric magic, some data might be in transit when you close a TCP connection. IIRC it is mandatory that it remains that way after closure. There is a thread on this list where Simon answered (sort of) your question