ping says unknown protocol icmp I have /etc/protocols file.

ping says unknown protocol icmp I have /etc/protocols file.

[Subodh Nijsure]

I have 2.4.1 running on my board with ramdisk loading etc.

However when I try to use ping it says unknown protocol icmp.

I have searched the mailing list archive and made sure that I have correct
/etc/protocols, /etc/services files.

Also I can see eth0 and loopback interface using ifconfig

Anybody knows how to get ping going.

Thanks.

/Subodh  Nijsure

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ping says unknown protocol icmp I have /etc/protocols file.

[Jeffrey D. Kowing]

Subodh Nijsure writes:
 >
 > I have 2.4.1 running on my board with ramdisk loading etc.
 >
 > However when I try to use ping it says unknown protocol icmp.
 >
 > I have searched the mailing list archive and made sure that I have correct
 > /etc/protocols, /etc/services files.

Had a similar problem recently.  Sadly, my little brain does not
exactly remember the solution, but I believe the problem was that I
did not have one of the necessary libraries on my ramdisk that allowed
ping to lookup the icmp protocol in the files you mention.

I think it was one of those libresolv* or libnss* libraries.


--
Jeff Kowing
jeffrey.d.kowing1@jsc.nasa.gov

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RE: ping says unknown protocol icmp I have /etc/protocols file.

[Subodh Nijsure]

Hello Jeffrey,


Thanks, indeed it was an issue of having libresolv library

I copied libresolve to /usr/lib when building the ramdisk and
ping works now.

BTW, is there a something equivalent to  ldd in powerpc world, so one
can find out which shared library an executable is linked with?
I have 8xx environment from MontaVista and I don't see ppc_8xx-ldd

/Subodh Nijsure

> -----Original Message-----
> From: Jeffrey D. Kowing [mailto:jeffrey.d.kowing1@jsc.nasa.gov]
> Sent: Friday, February 02, 2001 5:56 AM
> To: Subodh Nijsure
> Cc: linuxppc-embedded@lists.linuxppc.org
> Subject: ping says unknown protocol icmp I have /etc/protocols file.
>
>
>
> Subodh Nijsure writes:
>  >
>  > I have 2.4.1 running on my board with ramdisk loading etc.
>  >
>  > However when I try to use ping it says unknown protocol icmp.
>  >
>  > I have searched the mailing list archive and made sure
> that I have correct
>  > /etc/protocols, /etc/services files.
>
> Had a similar problem recently.  Sadly, my little brain does not
> exactly remember the solution, but I believe the problem was that I
> did not have one of the necessary libraries on my ramdisk that allowed
> ping to lookup the icmp protocol in the files you mention.
>
> I think it was one of those libresolv* or libnss* libraries.
>
>
> --
> Jeff Kowing
> jeffrey.d.kowing1@jsc.nasa.gov
>

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Re: ping says unknown protocol icmp I have /etc/protocols file.

[Frank Rowand]

Subodh Nijsure wrote:
>
> Hello Jeffrey,
>
> Thanks, indeed it was an issue of having libresolv library
>
> I copied libresolve to /usr/lib when building the ramdisk and
> ping works now.
>
> BTW, is there a something equivalent to  ldd in powerpc world, so one
> can find out which shared library an executable is linked with?
> I have 8xx environment from MontaVista and I don't see ppc_8xx-ldd
>
> /Subodh Nijsure

Yes, ldd is /bin/ldd in the target file system.

-Frank
--
Frank Rowand <frank_rowand@mvista.com>
MontaVista Software, Inc

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Re: ppc_8xx-ldd

[Joe Green]

[-- Attachment #1: Type: text/plain, Size: 749 bytes --]

On Fri, 02 Feb 2001, Frank Rowand wrote:
> Subodh Nijsure wrote:
> > BTW, is there a something equivalent to  ldd in powerpc world, so one
> > can find out which shared library an executable is linked with?
> > I have 8xx environment from MontaVista and I don't see ppc_8xx-ldd
>
> Yes, ldd is /bin/ldd in the target file system.

For execution on a development host, I've attached a simple shell script
that does something like ldd.  (ldd actually loads the program, which
won't work for cross-developed programs.)  It must be run from the same
directory as the target architecture objcopy and objdump, and must have
the same prefix (e.g., ppc_8xx-ldd, ppc_8xx-objcopy, ppc_8xx-objdump).

--
Joe Green <jgreen@mvista.com>
MontaVista Software, Inc.

[-- Attachment #2: ppc_8xx-ldd --]
[-- Type: application/x-shellscript, Size: 2768 bytes --]

Re: ppc_8xx-ldd

[Joe Green]

[-- Attachment #1: Type: text/plain, Size: 570 bytes --]

On Fri, 02 Feb 2001, Joe Green wrote:
> For execution on a development host, I've attached a simple shell script
> that does something like ldd.  (ldd actually loads the program, which
> won't work for cross-developed programs.)  It must be run from the same
> directory as the target architecture objcopy and objdump, and must have
> the same prefix (e.g., ppc_8xx-ldd, ppc_8xx-objcopy, ppc_8xx-objdump).

Of course, it would be better if it correctly removed the tmp file, as
the attached version does.  :-/

--
Joe Green <jgreen@mvista.com>
MontaVista Software, Inc.

[-- Attachment #2: ppc_8xx-ldd --]
[-- Type: application/x-shellscript, Size: 2776 bytes --]

Re: ping says unknown protocol icmp I have /etc/protocols file.

[Graham Stoney]

On Fri, Feb 02, 2001 at 10:33:15AM -0800, Frank Rowand wrote:
> Yes, ldd is /bin/ldd in the target file system.

Only problem is, you have to run it on the/a target, which implies that your
target is working (at least somewhat).  I looked around for a way of doing
this on the development system, but couldn't find anything better than
strings(1)...

Regards,
Graham
--
Graham Stoney
Assistant Technology Manager
Canon Information Systems Research Australia
Ph: +61 2 9805 2909  Fax: +61 2 9805 2929

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