If your hostname is 'foo.bar.baz' and your DNS server doesn't
actually reply to queries for 'foo.bar.baz' you can't just 'ping foo'
currently. While that may be somewhat of a misconfigured setup,
since we're already adding the domain part of the hostname to
/etc/resolv.conf we might as well add the short hostname to /etc/hosts
too so that ping works.
Otherwise glibc will count the localhost IPv6 (::1) mapping as
resolving to the IPv4 localhost mapping as well, so this:
127.0.0.1 localhost.localdomain localhost
::1 foobar localhost6.localdomain6 localhost6
192.168.1.2 fooar
causes a lookup of 'foobar' (or even just 'ping foobar') to resolve
to 127.0.0.1, even though the hostname is *not* listed on the
IPv4 localhost line. Apparently glibc just looks for the hostname
on any IPv4 or IPv6 localhost line.
We need to ensure that even if you don't have a routable IP address
for one of [IPv4, IPv6] that the hostname resolves to the localhost
address for that IP version, otherwise lots of stuff starts
breaking. But for the IP versions that you do have a routable IP
address, we want the hostname to map to that IP address too.
Instead of always mapping the current hostname to 127.0.0.1 or
whatever the user mapped it to manually, make sure the hostname
maps to the default device's IPv4 and IPv6 address if there's
a default device.
This helps out services that do a lookup on the machine hostname
to determine the IP address, which while a broken behavior (since
there are too many edge-cases) is pretty wide-spread and thus
we should support it.
If the hostname was changed while NM wasn't running, and thus /etc/hosts
was out of sync with the new hostname, NM wouldn't make sure that
the new hostname was mapped in /etc/hosts. Make sure that happens
and add a bunch of testcases for /etc/hosts rewriting.
Since the same interface could be used for both DHCPv4 and DHCPv6 we
can't just use 'iface' for tracking DHCP client lease changes. Instead
use a generated client ID, and track DHCP events based on the client's
PID instead of interface name.
0.7 requires dbus 1.1 or greater (for system bus activation), so make that
explicit, and remove compat code for D-Bus 0.6 and earlier. Consolidate
the various glib pkgconfig checks into one, since most anything will require
gthread, glib, and gobject anyway. Fixup the docs makefile to be more
automake-compatible and let 'make clean' actually work correctly when
docs are built.
Based on patches by Johan Bilien <jobi@via.ecp.fr>,
nick loeve <trickie@gmail.com>, and Roy Marples <roy@marples.name>
with significant changes for dhclient formatting and test cases.
Note that dhclient needs help before it can actually parse
classless static routes by adding the following to the
dhclient.conf file:
option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
