smb@ulysses.homer.nj.att.com (Steven M. Bellovin) (03/12/89)
Is there a comprehensive list of the new types and codes that have been added to ICMP since RFC 793? I know about subnet mask query and reply, and the Blacker Front End document lists code 10 (Administratively Prohibited) as a new code for Destination Unreachable. What should an implementation do with new codes? 4.3bsd, for example, rejects ICMP messages with unknown codes, rather than passing some error indication up to the application. --Steve Bellovin smb@ulysses.att.com