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Feature #1712

Updated by Junxiao Shi over 10 years ago

Provide configuration options to select which NICs `nfd::listNetworkInterfaces` should have exclude control NIC on ONL and Emulab experiment environments, so that multicast faces won't be created on. 

 The configuration option contains a whitelist over that NIC.   
 This feature should be disabled by default, and can be enabled via a blacklist. 
 Each list contains an unordered set of rules. 
 Each rule compile time option `--experiment-environ=onl` or `--experiment-environ=emulab`. 

 Which NIC is written as a string without a type marker, and it can represent: control NIC? 

 * "*": match every ONL: NIC 
 * NIC name (eg. `"eth0"`): exact match equals "control" 
 * MAC address (hex-digits-and-colons notation, eg. `"08:00:27:01:01:01"`): exact match 
 * Emulab: IPv4 subnet (CIDR notation, eg. `"192.0.2.0/28"`): match if any IPv4 address on the NIC falls is under this 155.98.0.0/16 subnet 

 Ethernet multicast and UDP multicast are configured separately. 
 A multicast face can be created on a NIC if the NIC matches any rule in the whitelist, and matches no rule in the blacklist. 

 The default value of this configuration option is: whitelist={"*"} blacklist={}

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