ping6

ping6

[eric]

Hi,
I've found what I think is a bug in the ping6 tool. Without the -n option,
it puts the hostname inside the parenthesis instead of the resolved ip
address as demonstrated below:

ericat@hydra:~/iputils-s20101006$ ping6 ipv6.he.net
PING ipv6.he.net(ipv6.he.net) 56 data bytes
64 bytes from ipv6.he.net: icmp_seq=1 ttl=58 time=186 ms

I expect output like this:

ericat@hydra:~/iputils-s20101006$ sudo ./ping6 ipv6.he.net
Password:
PING ipv6.he.net(2001:470:0:64::2) 56 data bytes
64 bytes from ipv6.he.net: icmp_seq=1 ttl=58 time=187 ms

Here's a very simple patch to ping6.c for proper behaviour:

ericat@hydra:~/iputils-s20101006$ diff ping6.c.orig ping6.c
979c979
<       printf("PING %s(%s) ", hostname, pr_addr(&whereto.sin6_addr));
---
>       printf("PING %s(%s) ", hostname, pr_addr_n(&whereto.sin6_addr));

Cheers,
Eric Atkin

Re: ping6

[Jérôme Poulin]

On Mon, Jul 18, 2011 at 4:23 PM, <eric@certus.bz> wrote:
>
> I've found what I think is a bug in the ping6 tool. Without the -n option,
> it puts the hostname inside the parenthesis instead of the resolved ip

I guess this is on purpose as IPv6 has very long IP and hostnames
should be used when possible, also, it does not show the hostname you
typed but the resolved RDNS of the IP as in:

jerome@MobileCPU ~ $ ping6 www.google.ca
PING www.google.ca(iad04s01-in-x63.1e100.net) 56 data bytes
64 bytes from iad04s01-in-x63.1e100.net: icmp_seq=1 ttl=55 time=57.7 ms

Re: ping6

[Krzysztof Olędzki]

On 2011-07-19 04:06, Jérôme Poulin wrote:
> On Mon, Jul 18, 2011 at 4:23 PM,<eric@certus.bz>  wrote:
>>
>> I've found what I think is a bug in the ping6 tool. Without the -n option,
>> it puts the hostname inside the parenthesis instead of the resolved ip
>
> I guess this is on purpose as IPv6 has very long IP and hostnames
> should be used when possible, also, it does not show the hostname you
> typed but the resolved RDNS of the IP as in:
>
> jerome@MobileCPU ~ $ ping6 www.google.ca
> PING www.google.ca(iad04s01-in-x63.1e100.net) 56 data bytes
> 64 bytes from iad04s01-in-x63.1e100.net: icmp_seq=1 ttl=55 time=57.7 ms

Hello,

Even if so it makes no sense to me. You end up without knowing which 
host you are pinging and a typical terminal is wide enough to display 
even longest IPv6 addresses.

Best regards,


			Krzysztof Olędzki