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[lwip-devel] Problem with Lwip-2.0.3 TCP Connection Establishment

From: antonio
Subject: [lwip-devel] Problem with Lwip-2.0.3 TCP Connection Establishment
Date: Thu, 30 Nov 2017 01:47:33 -0700 (MST)

Hi All, 

I am trying to connecting to api.ipify.org which returns my IP. (using 
application enabled by MbedTLS). 

I am having an annoying problem with my port (Arm-Cortex-M3). More often the
TCP connection 
establishment does not finish, my client 
remains in TCP SYN and re-transmits it for 6X before the connection breaks. 

Anyone who have had this problem, or any hints how to debug it is really 

I ATTACH my Wireshark capture.  Lwip203_TCPConnectProblem.pcap

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