Hi,
I am trying to make an embedded networking device communicate to a server
through TCP/IP. The device connects to the server through a constant local
port. The platform is Blackfin and I am using the lwip libraries.
After the connection is established, the device is sometimes shutdown
uncleanly (i.e. pulling out the power cord), and so it does not always
send a FIN to close the connection.
When the device comes back up, however, the SYN packets it sends to
re-establish the connection are not acknowledged. I would imagine this is
because the other side has not closed the previous connection (which uses
the same port/ip address).
Does this mean that I need to always send an RST packet forcibly to the
other side each time I try to establish the connection?
-Ajit
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