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NAME | DESCRIPTION | FILES | SEE ALSO | COLOPHON |
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PROTOCOLS(5) Linux Programmer's Manual PROTOCOLS(5)
protocols - protocols definition file
This file is a plain ASCII file, describing the various DARPA
internet protocols that are available from the TCP/IP subsystem.
It should be consulted instead of using the numbers in the ARPA
include files, or, even worse, just guessing them. These numbers
will occur in the protocol field of any IP header.
Keep this file untouched since changes would result in incorrect
IP packages. Protocol numbers and names are specified by the
IANA (Internet Assigned Numbers Authority).
Each line is of the following format:
protocol number aliases ...
where the fields are delimited by spaces or tabs. Empty lines
are ignored. If a line contains a hash mark (#), the hash mark
and the part of the line following it are ignored.
The field descriptions are:
protocol
the native name for the protocol. For example ip, tcp, or
udp.
number the official number for this protocol as it will appear
within the IP header.
aliases
optional aliases for the protocol.
This file might be distributed over a network using a network-
wide naming service like Yellow Pages/NIS or BIND/Hesiod.
/etc/protocols
The protocols definition file.
getprotoent(3)
⟨http://www.iana.org/assignments/protocol-numbers⟩
This page is part of release 5.13 of the Linux man-pages project.
A description of the project, information about reporting bugs,
and the latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
Linux 2012-08-05 PROTOCOLS(5)
Pages that refer to this page: getsockopt(2), socket(2), getprotoent(3), getprotoent_r(3), services(5)
Copyright and license for this manual page
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