Hello,
On Tue, 23 Jun 2015, Willem de Bruijn wrote:
> The ping utility from iputils relies on cmsg IP_RECVERR to get
> the source address on icmp errors, not on msg_name, so that
> worked for me both before and after applying the patch. I used
> `ping -t 2 $hostname` to trigger a TTL exceeded. Perhaps you used
> a different tool or test? In any case, the change looks fine to me.
> Thanks for preparing the patch.
# rpm -qf `which ping`
iputils-20140519-1.fc20.i686
It is using IP_RECVERR and may be relying only on
original address returned in msg_name from MSG_ERRQUEUE.
May be it ignores the error if original address is missing
or is different.
I didn't checked the ping source but I noticed that
it does not print anything on the read from raw socket, only
on IP_RECVERR. I noticed it when my network connection
failed. The incoming ICMP packet from my router was
DEST_UNREACH(type=3), HOST_UNREACH(code=1) but simple
REJECT rule in OUTPUT can do the same.
Regards
--
Julian Anastasov <[email protected]>
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