* Things to do * - How should we handle the case where MTU > MRU? Should we reduce the IP MTU to the link MRU (so TCP MSS is correct)? - Provide ways to: + set the IP address, possibly based on the peer's identity + have external checking of PAP user/password, CHAP response + supply the PAP user/password, CHAP secret + decide which tty to use (locking, DTR issues) - Integrate callback stuff? - Implement link quality monitoring - Implement other network control protocols