BIND 10 #1555: refactor: DHCP listening on more than one interface, timeout

[BIND 10 Development]

#1555: refactor: DHCP listening on more than one interface, timeout
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            Reporter:  tomek         |                        Owner:
                Type:  defect        |                       Status:  new
            Priority:  medium        |                    Milestone:  DHCP
           Component:  dhcp          |  Outstanding Tasks
            Keywords:                |                   Resolution:
           Sensitive:  0             |                 CVSS Scoring:
         Sub-Project:  DHCP          |              Defect Severity:  N/A
Estimated Difficulty:  0             |  Feature Depending on Ticket:
         Total Hours:  0             |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Comment (by tomek):

 The code was apparently updated to listen on every interface present.
 There is a configuration parameter !Dhcp/Interface and Dhcp6/Interface
 (which should be renamed to plural form as it is a list possibly more then
 one interface) that takes a list of interfaces. It can be specified, but
 the values are ignored.

 The original idea was to allow explicit interface names to be specific or
 a keyword 'all' which will autodetect and open on all (as it does now).

 IfaceMgr::openSockets{4,6} methods should be updated.

 Also see ticket #3038.

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Ticket URL: <https://bind10.isc.org/ticket/1555#comment:2>
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