1.\" $OpenBSD: protocols.5,v 1.12 2019/03/03 17:04:17 deraadt Exp $ 2.\" $NetBSD: protocols.5,v 1.3 1994/11/30 19:31:27 jtc Exp $ 3.\" 4.\" Copyright (c) 1983, 1991, 1993 5.\" The Regents of the University of California. All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. Neither the name of the University nor the names of its contributors 16.\" may be used to endorse or promote products derived from this software 17.\" without specific prior written permission. 18.\" 19.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" 31.\" @(#)protocols.5 8.1 (Berkeley) 6/5/93 32.\" 33.Dd $Mdocdate: March 3 2019 $ 34.Dt PROTOCOLS 5 35.Os 36.Sh NAME 37.Nm protocols 38.Nd protocol name database 39.Sh DESCRIPTION 40The 41.Nm 42file contains information regarding the known protocols used in the 43Internet. 44For each protocol, a single line should be present 45with the following information: 46.Bd -unfilled -offset indent 47official protocol name 48protocol number 49aliases 50.Ed 51.Pp 52Items are separated by any number of blanks and/or tab characters. 53.Pp 54A hash mark 55.Pq Ql # 56indicates the beginning of a comment; subsequent characters up to the 57end of the line are not interpreted by the routines which search the file. 58.Pp 59Protocol names may contain any printable character other than a 60field delimiter, newline, or comment character. 61.Sh FILES 62.Bl -tag -width /etc/protocols -compact 63.It Pa /etc/protocols 64.El 65.Sh SEE ALSO 66.Xr getprotoent 3 67.Sh HISTORY 68The 69.Nm 70file format appeared in 71.Bx 4.2 . 72.Sh BUGS 73A name server should be used instead of a static file. 74Lines in 75.Pa /etc/protocols 76are limited to 77.Dv BUFSIZ 78characters (currently 1024). 79Longer lines will be ignored. 80