Jeremie Courreges-Anglas(j...@wxcvbn.org) on 2017.07.12 21:00:44 +0200:
> Jeremie Courreges-Anglas <j...@wxcvbn.org> writes:
>
> > Kapetanakis Giannis <bil...@edu.physics.uoc.gr> writes:
> >
> >> On 10/07/17 17:22, Jeremie Courreges-Anglas wrote:
> >>> Using -1 for IPV6_UNICAST_HOPS is correct.
> >>>
> >>> Note that you can also use -1 for IP_TTL on OpenBSD, sadly some systems
> >>> out there don't support it.
> >>>
> >>>> comments?
> >>>
> >>> ok jca@ with the nits below.
> >>>
> >>> It would be nice to factor this out in a helper function and use it
> >>> elsewhere in relayd.
> >>
> >> Thanks for the comments.
> >>
> >> My guess is that the helper function should go outside of relayd so it can
> >> be used by others as well?
> >> I leave that to a more competent programmer.
> >>
> >> Would you like me to set -1 to IP_TTL as well and drop the call to
> >> getsockopt(2)?
> >
> > I'm not sure about this. Maybe it should be discussed separately?
> >
> >> updated diff bellow (in case not) with jca@ recommendations.
> >
> > I have tweaks, but this already looks fine to me. ok jca@
>
> The tweak I had in mind: consistently use "ttl" for all the
> get/setsockopt calls.
>
> ok?
yes please
>
>
> Index: check_icmp.c
> ===================================================================
> RCS file: /d/cvs/src/usr.sbin/relayd/check_icmp.c,v
> retrieving revision 1.46
> diff -u -p -p -u -r1.46 check_icmp.c
> --- check_icmp.c 11 Jul 2017 19:41:30 -0000 1.46
> +++ check_icmp.c 12 Jul 2017 18:57:52 -0000
> @@ -220,11 +220,12 @@ send_icmp(int s, short event, void *arg)
> sizeof(packet));
> }
>
> + ttl = host->conf.ttl;
> switch(cie->af) {
> case AF_INET:
> - if ((ttl = host->conf.ttl) > 0) {
> + if (ttl > 0) {
> if (setsockopt(s, IPPROTO_IP, IP_TTL,
> - &host->conf.ttl, sizeof(int)) == -1)
> + &ttl, sizeof(ttl)) == -1)
> log_warn("%s: setsockopt",
> __func__);
> } else {
> @@ -243,10 +244,10 @@ send_icmp(int s, short event, void *arg)
> }
> break;
> case AF_INET6:
> - if ((ttl = host->conf.ttl) > 0) {
> + if (ttl > 0) {
> if (setsockopt(s, IPPROTO_IPV6,
> - IPV6_UNICAST_HOPS, &host->conf.ttl,
> - sizeof(int)) == -1)
> + IPV6_UNICAST_HOPS, &ttl,
> + sizeof(ttl)) == -1)
> log_warn("%s: setsockopt",
> __func__);
> } else {
>
>
> --
> jca | PGP : 0x1524E7EE / 5135 92C1 AD36 5293 2BDF DDCC 0DFA 74AE 1524 E7EE
>
