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Re: [bug-inetutils] bug in ping: ip->ip_src and ip->ip_dst hold the same
From: |
Sam Halliday |
Subject: |
Re: [bug-inetutils] bug in ping: ip->ip_src and ip->ip_dst hold the same value |
Date: |
Mon, 10 Nov 2003 01:02:03 +0000 |
this one goes back a while
[http://mail.gnu.org/archive/html/bug-inetutils/2003-08/msg00001.html], sorry i
was a bit busy:
Sergey Poznyakoff wrote:
> > unfortunately i was not able to find or fix
> > this problem as i cannot even see where ip->ip_dst is being set anywhere in
> > the code, but it is clear that there is a problem somewhere.
>
> Ip_dst is not set anywhere, it is retrieved from the IP packet header
> received from the remote station. If both ip_src and ip_dst are the
> same, this means that the same interface was sending and answering
> the requests.
>
> If you wish a more detailed analisis, please supply some more
> information about your test, at least the exact invocation of ping and
> the first several lines of its output. Also, the information about the
> interfaces on the source machine.
ok, i am on a LAN which is served as usual by a DHCP server at 192.168.0.1, my
address being 192.168.0.2. i get the following output if i attempt to ping the
(non-existent) address 192.168.0.11 with inetutils-1.4.2
$ping -v 192.168.0.11
PING 192.168.0.11 (192.168.0.11): 56 data bytes
64 bytes from hostess (192.168.0.2): Destination Host Unreachable
Vr HL TOS Len ID Flg off TTL Pro cks Src Dst Data
4 5 c0 7000 09ed 0 0000 40 01 6f0b 192.168.0.2 192.168.0.2
(note the Dst Data is not correct), whereas i get the following from netkit-0.17
$ping -v 192.168.0.11
PING 192.168.0.11 (192.168.0.11): 56 octets data
92 octets from hostess (192.168.0.2): Destination Host Unreachable
Vr HL TOS Len ID Flg off TTL Pro cks Src Dst Data
4 5 00 5400 0000 0 0040 40 01 4bb9 192.168.0.2 192.168.0.11
which does contain the correct Dst Data.
the Src machine has a standard network card on eth0... the Dst does not exist.
cheers,
Sam
pgpdtbQYNluo8.pgp
Description: PGP signature
- Re: [bug-inetutils] bug in ping: ip->ip_src and ip->ip_dst hold the same value,
Sam Halliday <=
Re: [bug-inetutils] bug in ping: ip->ip_src and ip->ip_dst hold the same value, Sam Halliday, 2003/11/21