dhcpv4: rework lease expire handling logic
authorHans Dedecker <dedeckeh@gmail.com>
Tue, 12 Sep 2017 08:31:13 +0000 (10:31 +0200)
committerHans Dedecker <dedeckeh@gmail.com>
Wed, 13 Sep 2017 13:34:22 +0000 (15:34 +0200)
Don't rely on incoming DHCPv4 messages to trigger the lease expire
detection logic but rather use a periodic timer which checks every
second if a lease is expired

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

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