[Bug 1798313] Re: traceoute6 gives error sendto: Invalid argument

[A. Karl Kornel]

Hello!

I just wanted to chime in: My co-worker and I ran into this exact
problem.  The `traceroute6` command was giving us "sendto: Invalid
argument", and we did not have the `traceroute` package installed.  It
was only by finding this Launchpad bug that we became aware of the
problem, after about half an hour of confusion and web-searching.

One other note: In addition to installing the `traceroute` package, we
also had to use `update-alternatives`, so that running traceroute (or
traceroute6) would go to the executable provided by the traceroute
package.

This was really confusing, so I would like to suggest that some sort of
action be taken upstream: Maybe a Release Notes item, or some other way
to let sysadmins know that the `traceroute6` executable in the iputils
package has an important bug (as per the Debian bug entry), and that the
workaround is to install the traceroute package, and then use `update-
alternatives` to set traceroute's traceroute6 as the preferred
traceroute6.

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https://bugs.launchpad.net/bugs/1798313

Title:
  traceoute6 gives error sendto: Invalid argument

Status in Iputils:
  Fix Released
Status in iputils package in Ubuntu:
  Confirmed
Status in iputils package in Debian:
  Fix Released

Bug description:
  When running the following command all get is an error. (traceroute6.db works)
  # traceroute6.iputils 2001:4860:4860::8888
  traceroute to 2001:4860:4860::8888 (2001:4860:4860::8888) from 2a00:8780:3:42:b92a:b222:8bed:4a9b, 30 hops max, 24 byte packets
  sendto: Invalid argument
   1 traceroute: wrote 2001:4860:4860::8888 24 chars, ret=-1
   *sendto: Invalid argument
  traceroute: wrote 2001:4860:4860::8888 24 chars, ret=-1
   *sendto: Invalid argument
  traceroute: wrote 2001:4860:4860::8888 24 chars, ret=-1
   *

  This seems like a regression of Debian bug https://bugs.debian.org
  /cgi-bin/bugreport.cgi?bug=843264

  Package version installed:
  iputils-tracepath 3:20161105-1ubuntu2 amd64

  # lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu 18.04.1 LTS
  Release:	18.04
  Codename:	bionic

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