TCP2 : How to add MSS option on sending [SYN, ACK] to client?

[liang8057]

I want to add mms to the tcp option during the three-way handshake.
Is there any API available?

[jukkar]

Currently the TCP stack does not add any tcp options when sending data. We could support TCP_MAXSEG socket option that the application could set. Patches are welcome if you want to implement it.

[liang8057]

Can TCP1 add mss tcp option?

[liang8057]

I did not find the TCP_MAXSEG socket option, is there an example for reference?

[jukkar]

Can TCP1 add mss tcp option?

Yes, there is some option setting in TCP1. Seach net_tcp_set_syn_opt() function.

[jukkar]

I did not find the TCP_MAXSEG socket option, is there an example for reference?

Yes, see for example subsys/net/lib/sockets/sockets.c and zsock_setsockopt_ctx()

[carlescufi]

Closing since it's out of date (TCP1 is no longer in the tree).