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[lwip-users] PPPos does not detect modem disconnection

From: vinimac
Subject: [lwip-users] PPPos does not detect modem disconnection
Date: Thu, 7 Nov 2019 09:49:02 -0700 (MST)

Hi all,

I am simulating a signal loss by removing the antenna from the modem and it
keep sending packets to a server using TCP socket. After remove the antenna,
the function send wont fail() and error number is not set too. 

I was expecting TCP layer to detect the lack of TCP ACK or PPP should have
some timeout? 

I am running Lwip 2.0 from ESP32 SDK.
(git master)
  ++ New features:
  2016-02-22: Ivan Delamer:
  * Initial 6LoWPAN support

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