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Re: [lwip-users] lwIP problem with new connection


From: Sergio R. Caprile
Subject: Re: [lwip-users] lwIP problem with new connection
Date: Fri, 2 Mar 2018 10:16:46 -0300
User-agent: Mozilla/5.0 (Windows NT 6.1; rv:52.0) Gecko/20100101 Thunderbird/52.6.0

You should compare what you actually do against what you should do.
Have you actually checked the echo server code, for example ?

You must call tcp_accepted(pcbreturnedwhencallingtcp_new) inside your tcp_accept callback. ( and you have to check for the return value of tcp_listen(), it might not have enough memory (pcbs) to do its job.
and AFAIK, you don't memp_free() a pcb. )

3 pieces of advice:
- If you use callbacks, you are not using "a socket", I guessed you are using the RAW API with or without an OS, try to be specific on your scenario.
- Don't link to pictures, we like to see capture files.
- Some of us are too lazy to look at such a big bunch of code.



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