| .\" Copyright (c) 1995 Martin Schulze <joey@infodrom.north.de> |
| .\" |
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| .\" 1995-10-18 Martin Schulze <joey@infodrom.north.de> |
| .\" * first released |
| .\" 2002-09-22 Seth W. Klein <sk@sethwklein.net> |
| .\" * protocol numbers are now assigned by the IANA |
| .\" |
| .TH PROTOCOLS 5 2012-08-05 "Linux" "Linux Programmer's Manual" |
| .SH NAME |
| protocols \- protocols definition file |
| .SH DESCRIPTION |
| 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. |
| .PP |
| 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). |
| .\" .. by the DDN Network Information Center. |
| .PP |
| Each line is of the following format: |
| .PP |
| .RS |
| .I protocol number aliases ... |
| .RE |
| .PP |
| 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. |
| .PP |
| The field descriptions are: |
| .TP |
| .I protocol |
| the native name for the protocol. |
| For example |
| .IR ip , |
| .IR tcp , |
| or |
| .IR udp . |
| .TP |
| .I number |
| the official number for this protocol as it will appear within the IP |
| header. |
| .TP |
| .I aliases |
| optional aliases for the protocol. |
| .PP |
| This file might be distributed over a network using a network-wide |
| naming service like Yellow Pages/NIS or BIND/Hesiod. |
| .SH FILES |
| .TP |
| .I /etc/protocols |
| The protocols definition file. |
| .SH SEE ALSO |
| .BR getprotoent (3) |
| .PP |
| .UR http://www.iana.org\:/assignments\:/protocol\-numbers |
| .UE |