Re: [lwip-users] Retransmission of a already acknowlegded package.

Hi again, the last days I tried to get the stack working with NO_SYS=0 set. I've implemented the port function. But it's not working. I always get a LWIP ASSERT pbuf_free: p-ref 0 message. I don't understand what this means and how I can find the reason. Any hints from your side? Thanks BR

Re: [lwip-users] Retransmission of a already acknowlegded package

Well, Christian, I don't have any expertise on the NO_SYS=0 world, but I can tell you that you normally don't implemented the port function. You don't port lwIP to an OS unless you know exactly what you are doing, you normally get a port for your OS and ask your OS port maintainers when you have

Re: [lwip-users] Retransmission of a already acknowlegded package.

Hi, there are many reasons why that can happen. You should tell which application you are running, so we can have less stuff to guess at. My best (probably educated) guess is that frame 1513 got lost somewhere. Somewhere here can be: - your transmitter, which is... - your network - your hardware,

[lwip-users] Retransmission of a already acknowlegded package.

Hi, I'm using lwip141 in NO_SYS mode. In random intervals a retransmission happens for a already acknowlegded package. After that a dupack package gets send. I've attached a Wireshark capture where you can see this at package 1516. What can be the reason for this behaviour? Thank you BR