I noted a different behaviour between W5500 and W5100 responding to [SYN] packet when all sockets are busy and no more connections can be accepted.
While W5100 answer with a [RST] packet, W5500 send a [RST,ACK] packet, I presume to speed up the ethernet traffic.
This difference impacts on browsers behaviour:
- with W5100 there is a retransmission of the [SYN] packet and the request is acknowledged as soon a socket becomes available
- with W5500 the request is aborted
Is there a way to set W5500 in order to send only the [RST] packet without the ACK as W5100 does?
I haven’t a W5200 to test. Does anybody knows how W5200 behaves?