BIND 10 #3319: IfaceMgr debuggability improvement

[BIND 10 Development]

#3319: IfaceMgr debuggability improvement
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                   Reporter:  tomek  |                 Owner:
                       Type:         |                Status:  new
  enhancement                        |             Milestone:  DHCP
                   Priority:         |  Outstanding Tasks
  medium                             |              Keywords:
                  Component:         |             Sensitive:  0
  libdhcp                            |           Sub-Project:  DHCP
               CVSS Scoring:         |  Estimated Difficulty:  0
            Defect Severity:  N/A    |           Total Hours:  0
Feature Depending on Ticket:         |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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 receive4() and receive6() methods in IfaceMgr should have the capability
 to log which sockets over which interface are used to receive data.

 Such an information was very useful in debugging various issues in
 Dibbler, and it will be helpful in Kea as well.

 In general, we need a way to log something from libdhcp.

 Tom suggested that socket callbacks could be extended with an extra
 descriptive string that could be logged as well.

 Also see changes in #3315 (the socket logging was partially implemented,
 but there was no way to print it out, so the code was removed).

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Ticket URL: <http://bind10.isc.org/ticket/3319>
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