protocols

 

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 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'' and the NIS+
      table       ``protocols''.       Programs       use      the
      getprotobyname(3SOCKET) routine 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. Protocol names may contain
      any printable character other than a field delimiter,  <NEW-
      LINE>, 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
 
 
 
 SunOS 5.8           Last change: 10 Nov 1999                    1
 
 
 
 
 
 
 File Formats                                         protocols(4)
 
 
 
      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 5.8           Last change: 10 Nov 1999                    2
 
 
 

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