Re: [lwip-devel] SYN-SENT state does not accept SYN only segment

[address@hidden]

narke wrote:
> I found in lwIP,  when an active open pcb in its SYN-SENT state and
> received an segment sent from peer which has SYN flag but w/o ACK
> flag,  the pcb just ignore the segment.  However, in RFC 793, it is
> required to accept the SYN only segment in SYN-SENT state and switch
> to SYN-RCVD state.
>
> Can anyone please confirm this?  It's a bug or a dedicated design?

Well spotted, I think your observations are correct! I don't think it's 
a dedicated design, although I've never seen a stack behaving like that. 
Therefore I'd regard this as low prio (not targeting 1.4.1). Would you 
mind filing a bug?

Thanks,
Simon