Manual Pages for UNIX Operating System command usage for man protocols

File Formats                                         protocols(4)



NAME
     protocols - protocol name database

SYNOPSIS
     /etc/inet/protocols


     /etc/protocols


DESCRIPTION
     The protocols file  is a local source of information regard-
     ing the known protocols used in the DARPA Internet. The pro-
     tocols file can be used in conjunction with  or  instead  of
     other    protocols   sources,   including   the   NIS   maps
     ``protcols.byname'' and "protocols.bynumber".  Programs  use
     the  getprotobyname(3SOCKET) routine to access this informa-
     tion.


     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 char-
     acters.  A `#' indicates the beginning of a comment; charac-
     ters up to the end of the line are not interpreted  by  rou-
     tines  which search the file. Protocol names may contain any
     printable character other than a field  delimiter,  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




SunOS 5.11          Last change: 10 Dec 2009                    1






File Formats                                         protocols(4)



       #
       # 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  proto-
     cols  file.  The symbolic link /etc/protocols exists for BSD
     compatibility.




























SunOS 5.11          Last change: 10 Dec 2009                    2