BIND 10 #3188: socket creator support for raw sockets

[BIND 10 Development]

#3188: socket creator support for raw sockets
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            Reporter:  shane         |                        Owner:
                Type:  enhancement   |                       Status:  new
            Priority:  medium        |                    Milestone:
           Component:  Unclassified  |  Sprint-20131015
            Keywords:                |                   Resolution:
           Sensitive:  0             |                 CVSS Scoring:
         Sub-Project:  Core          |              Defect Severity:  N/A
Estimated Difficulty:  5             |  Feature Depending on Ticket:
         Total Hours:  0             |          Add Hours to Ticket:  0
                                     |                    Internal?:  0
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Comment (by muks):

 This ticket also involves doing some equivalent of:

 * Update b10-sockcreator to create the raw socket, set socket options and
 bind it as required by the code
 * update socketcreator.py to speak the b10-sockcreator "protocol" to
 handle raw sockets
 * updating the socket cache to cache raw sockets
 * modify `b10-init` to handle a `get_raw_socket` command and create a
 token for it
 * modify `b10-init` to send raw sockets for a token over its unix domain
 socket
 * Update `isc::server_common::SocketRequestor` (or create something
 equivalent) to get a raw socket from `b10-init` using its unix domain
 socket
 * Update the DHCP code itself to use this socket requestor

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Ticket URL: <http://bind10.isc.org/ticket/3188#comment:7>
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