Apple Documentation
- https://developer.apple.com/library/mac/documentation/darwin/conceptual/KEXTConcept
- https://developer.apple.com/library/mac/documentation/Darwin/Conceptual/NKEConceptual/
- https://developer.apple.com/library/mac/documentation/Darwin/Conceptual/NKEConceptual/socket_nke/socket_nke.html
- https://developer.apple.com/library/Mac/documentation/Kernel/Reference/kpi_socketfilter_header_reference/Reference/reference.html
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