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The protocols file is a local source of information
regarding the known protocols used in the DARPA
Internet. The protocols file can be used in conjunction with or instead
of other protocols sources, including the NIS
maps ``protcols.byname'' and ``"protocols.bynumber'' and the NIS+ table ``protocols''. Programs use the getprotobyname(3SOCKET) routine
to access this information.
The protocols file has one line for each protocol. The line has the
following format:
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official-protocol-name protocol-number aliases
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Items are separated by any number of blanks and/or TAB characters. A `#' indicates the beginning
of a comment; characters up to the end of the line are not interpreted by
routines which search the file. Protocol names may contain any printable
character other than a field delimiter, NEWLINE,
or comment character.
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