Protocol Kernel Services
Protocol kernel services provide a means of finding a particular address family as well as a raw protocol handler. The raw protocol handler basically passes raw packets up through sockets so that a protocol can be implemented in user space.
The Protocol kernel services are:
| Item | Description |
|---|---|
| pfctlinput | Starts the ctlinput function for each configured protocol. |
| pffindproto | Returns the address of a protocol switch table entry. |
| raw_input | Builds a raw_header structure for a packet and sends both to the raw protocol handler. |
| raw_usrreq | Implements user requests for raw protocols. |