On Tue, Sep 25, 2018 at 09:11:42AM +0800, Nan Xiao wrote:
> Hi tech@,
>
morning.
> According to netcat source code, the `-T' option not only takes effect
> in IPv4 but also IPv6:
>
> if (Tflag != -1) {
> if (af == AF_INET && setsockopt(s, IPPROTO_IP,
> IP_TOS, &Tflag, sizeof(Tflag)) == -1)
> err(1, "set IP ToS");
>
> else if (af == AF_INET6 && setsockopt(s, IPPROTO_IPV6,
> IPV6_TCLASS, &Tflag, sizeof(Tflag)) == -1)
> err(1, "set IPv6 traffic class");
> }
>
> So I think the following patch should be more accurate:
>
> diff --git nc.1 nc.1
> index cb391288f15..5588daf87ae 100644
> --- nc.1
> +++ nc.1
> @@ -241,7 +241,7 @@ Cannot be used together with
> or
> .Fl x .
> .It Fl T Ar keyword
> -Change the IPv4 TOS value or the TLS options.
> +Change the IPv4 TOS/IPv6 Traffic Class value or the TLS options.
> .Pp
> For TLS options,
> .Ar keyword
> @@ -269,7 +269,7 @@ for further details).
> Specifying TLS options requires
> .Fl c .
> .Pp
> -For the IPv4 TOS value,
> +For the IPv4 TOS/IPv6 Traffic Class value,
> .Ar keyword
> may be one of
one question: are the keywords identical for both v4 and 6?
if so, anyone want to ok this?
if not, the diff needs work.
also, i think traffic class should be lower case.
jmc
> .Cm critical ,
>
>
> Thanks!
>
> --
> Best Regards
> Nan Xiao
>
