Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx> wrote: > On Tue, Jun 20, 2023 at 10:08:36PM +0200, Florian Westphal wrote: > > ip header can only accomodate 8but value, but IPPROTO_MAX has been bumped > > due to uapi reasons to support MPTCP (262, which is used to toggle on > > multipath support in tcp). > > Maybe use IPPROTO_RAW + 1, hopefully that won't ever change. If you don't like UINT8_MAX+1, would you be fine with open-coding, i.e. [256] ?