• Jiri Pirko's avatar
    ipv4: introduce address lifetime · 5c766d64
    Jiri Pirko authored
    There are some usecase when lifetime of ipv4 addresses might be helpful.
    For example:
    1) initramfs networkmanager uses a DHCP daemon to learn network
    configuration parameters
    2) initramfs networkmanager addresses, routes and DNS configuration
    3) initramfs networkmanager is requested to stop
    4) initramfs networkmanager stops all daemons including dhclient
    5) there are addresses and routes configured but no daemon running. If
    the system doesn't start networkmanager for some reason, addresses and
    routes will be used forever, which violates RFC 2131.
    
    This patch is essentially a backport of ivp6 address lifetime mechanism
    for ipv4 addresses.
    
    Current "ip" tool supports this without any patch (since it does not
    distinguish between ipv4 and ipv6 addresses in this perspective.
    
    Also, this should be back-compatible with all current netlink users.
    Reported-by: default avatarPavel Šimerda <psimerda@redhat.com>
    Signed-off-by: default avatarJiri Pirko <jiri@resnulli.us>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    5c766d64
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