We call this, which avoids POLLERR returns from netlink on a loaded system,
if the kernel is new enough to support it. Sadly, qemu-user doesn't support
the socket option, so if it fails despite the kernel being new enough to
support it, we just emit a warning, rather than failing hard.
Route lookup in Linux is bounded by `ip rules` as well
as the contents of specific routing tables. With the
advent of vrf's(l3mdev's) non-default tables are regularly being
used for routing purposes.
dnsmasq listens to all route changes on the box and responds
to each one with an event. This is *expensive* when a full
BGP routing table is placed into the linux kernel, moreso
when dnsmasq is responding to events in tables that it will
never actually need to respond to, since dnsmasq at this
point in time has no concept of vrf's and would need
to be programmed to understand them. Help alleviate this load
by reducing the set of data that dnsmasq pays attention to
when we know there are events that are not useful at this
point in time.
Signed-off-by: Donald Sharp <donaldsharp72@gmail.com>
This was the source of a large number of #ifdefs, originally
included for use with old embedded libc versions. I'm
sure no-one wants or needs IPv6-free code these days, so this
is a move towards more maintainable code.
The nasty code with static variable in retry_send() which
avoids looping forever needs to be called on success of the syscall,
to reset the static variable.
The linux kernel treats all addresses with a limited lifetime as being
non permanent, but when taking over the prefix livetimes from
upstream assigned prefixes through DHCP, addresses will always have a limited
lifetime.
Still reject temporary addresses, as they indicate autoconfigured
interfaces.
Contributed by T-Labs, Deutsche Telekom Innovation Laboratories
Signed-off-by: Jonas Gorski<jogo@openwrt.org>
configuration - we have to read all the MAC addresses from netlink,
not bail when we find a suitable one.
Fix thinko in dhcp_update_configs - thanks to Hartmut for spotting
that.
Get a sensible address for the default DNS server even when using a
relay.
TODO
hostname handling.
update DHCP6 configs from dns
parse domain=<domain>,<IPv6 range>
pretty-print counted string options.
DECLINE messages
lease-script fro DHCPv6
Simon Kelley