protocols man page on SmartOS

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PROTOCOLS(4)							  PROTOCOLS(4)

NAME
       protocols - protocol name database

SYNOPSIS
       /etc/inet/protocols

       /etc/protocols

DESCRIPTION
       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, includ‐
       ing the NIS maps ``protcols.byname'' and "protocols.bynumber"  and  the
       NIS+ table ``protocols''. Programs use the getprotobyname(3SOCKET) rou‐
       tine to access this information.

       The protocols file has one line for each protocol.  The	line  has  the
       following format:

	 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. Proto‐
       col names may contain any printable character other than a field delim‐
       iter, NEWLINE, or comment character.

EXAMPLES
       Example 1 A Sample Database

       The following is a sample database:

	 #
	 # Internet (IP) protocols
	 #
	 ip	     0	 IP	     # internet protocol, pseudo protocol number
	 icmp	     1	 ICMP	     # internet control message protocol
	 ggp	     3	 GGP	     # gateway-gateway protocol
	 tcp	     6	 TCP	     # transmission control protocol
	 egp	     8	 EGP	     # exterior gateway protocol
	 pup	     12	 PUP	     # PARC universal packet protocol
	 udp	     17	 UDP	     # user datagram protocol

	 #
	 # Internet (IPv6) extension headers
	 #
	 hopopt	     0	 HOPOPT	     # Hop-by-hop options for IPv6
	 ipv6	     41	 IPv6	     # IPv6 in IP encapsulation
	 ipv6-route  43	 IPv6-Route  # Routing header for IPv6
	 ipv6-frag   44	 IPv6-Frag   # Fragment header for IPv6
	 esp	     50	 ESP	     # Encap Security Payload for IPv6
	 ah	     51	 AH	     # Authentication Header for IPv6
	 ipv6-icmp   58	 IPv6-ICMP   # IPv6 internet control message protocol
	 ipv6-nonxt  59	 IPv6-NoNxt  # No next header extension header for IPv6
	 ipv6-opts   60	 IPv6-Opts   # Destination Options for IPv6

FILES
       /etc/nsswitch.conf
			     configuration file for name-service switch

SEE ALSO
       getprotobyname(3SOCKET), nsswitch.conf(4)

NOTES
       /etc/inet/protocols  is	the  official SVR4 name of the protocols file.
       The symbolic link /etc/protocols exists for BSD compatibility.

				 Jun 13, 2002			  PROTOCOLS(4)
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