Hello Sergio,
    Sorry for the late response. The target IP address is 192.168.1.3 and
mask is 255.255.255.0, gateway is 192.168.1.10. Target is directly to
connected to Laptop, no devices in between. I've given the highest priority
for TCP Thread task. I'm using raw API. I'm initiating connection by
calling tcp_connect function and it gives ERR_OK. I've registered tcp_err
function too. If the target couldn't connect then it should atleast invoke
that error function right? That function is also not getting invoked. What
really confuses me most is, the connect function initiates the connection
by sending ARP request and it receives the ARP response but from there it
just ignores, no error function is called, no connection is established.
Even after this, if I ping target from my laptop it sends the ping
response. Hope I've given the information you wanted. Please let me know if
you need further information.

Best Regards,
ARUL PRAKASH M

On Fri 1 Mar, 2019, 6:13 PM Sergio R. Caprile, <[email protected]> wrote:

> Your scenario ? I mean: IP addresses, masks, gateways. Sometimes wrong
> configurations "just work".
> Your netif setup ?
> Your call setup ? How do you initiate your connection ? What does that
> function return ? Are you using the RAW API ? The netconn API ? The
> socket API ?
> Threading rules ?
>
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