Re: relayd's icmp check only works for a small number of hosts

[Remi Locherer]

On 2016-09-01 00:27, Sebastian Benoit wrote:
Remi Locherer(remi.loche...@relo.ch) on 2016.08.19 16:31:10 +0200:
>Synopsis:   relayd's icmp check only works for a small number of hosts
>Category:   relayd
>Environment:
        System      : OpenBSD 5.9
	Details     : OpenBSD 5.9 (GENERIC.MP) #10: Wed Aug  3 13:46:07 CEST 
2016
			 
r...@stable-59-amd64.mtier.org:/binpatchng/work-binpatch59-amd64/src/sys/arch/amd64/compile/GENERIC.MP

        Architecture: OpenBSD.amd64
        Machine     : amd64

>Description:
	relayd says 70 out of 104 hosts are not reachable via icmp. But ping 
on
the same host where relayd runs can reach all hosts with a rtt below 
1ms.

In the logs I see "210ms,icmp read timeout". But in relayd.conf a 
timeout
of 1000 is set.

Could this be related to the problem mentioned in the commit message 
of
src/usr.sbin/relayd/check_icmp.c rev 1.41?

i think you mean 1.40?

yes

try to increase

usr.sbin/relayd/relayd.h:93:#define ICMP_RCVBUF_SIZE 262144

and see if you can have more checks then.

I tried the values 524288 and 393216 for ICMP_RCVBUF_SIZE. For both 
values relayd tells me:

relayd_icmp_patch: icmp_setup: setsockopt: No buffer space available

And then it exits.