NAME

protocols − protocol name data base

SYNOPSIS

/etc/protocols

DESCRIPTION

The protocols file contains information regarding the known protocols used in the DARPA Internet.  For each protocol a single line should be present with the following information:

official protocol name
protocol number
aliases

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. 

EXAMPLE

The following example is taken from SunOS. 

#
# Internet (IP) protocols
#
ip0IP# internet protocol, pseudo protocol number
icmp1ICMP# internet control message protocol
ggp3GGP# gateway-gateway protocol
tcp6TCP# transmission control protocol
pup12PUP# PARC universal packet protocol
udp17UDP# user datagram protocol

FILES

/etc/protocols

SEE ALSO

getprotoent(3N)

BUGS

A name server should be used instead of a static file.  A binary indexed file format should be available for fast access. 

Sun Release 4.0  —  Last change: 19 October 1987