RFC 996 (rfc996) - Page 2 of 3

Statistics server

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RFC 996                                                    February 1987


   commands and responses must fit into a single 576-octet IP datagram.
   In both UDP and TCP the assigned port number is 133 (decimal).

   As is conventional in other lightweight services of this type
   (NETSTAT, FINGER, etc.), there is no provision for access control or
   authentication in STATSRV. If necessary, each command could include a
   password or other mechanism to discourage casual abuse.

EXAMPLE

   The Fuzzball system includes many local commands to display internal
   data structures, including one that produces the following billboard
   for each network device, in this case "dm0" on host "udel2.udel.edu":

        Process type: 000027  options: 040000
        Subnet: DMV  status: 376  hello: 15  timeout: 2000
        Foreign address: [192.5.39.87]  max size: 576
        Input packets      3645    Output packets  3690
          bad format       0       ICMP msgs       0
          bad checksum     0       Input errors    0
          returned         0       Output errors   0
          dropped          2       No buffer       0
          HELLO msgs       2286    Preempted       0

   The same billboard is returned as a null-terminated ASCII string in a
   UDP datagram by sending the null-terminated ASCII command "dm0" in a
   UDP datagram to the host. Similar billboards can be produced for most
   processes in the system. Unix programs and shell scripts have been
   built which send commands like these to selected hosts on a periodic
   basis in order to construct a simple, ad-hoc monitoring facility.

REFERENCES

   [1]  Flood Page, D.,"Gateway Monitoring Protocol", DARPA Network
        Working Group Report IEN-131, Bolt Beranek and Newman, February
        1980.

   [2]  Flood Page, D., "The CMCC Terminal Process", DARPA Network
        Working Group Report IEN-132, Bolt Beranek and Newman, February
        1980.

   [3]  Flood Page, D., "CMCC Performance Measurement Message Formats",
        DARPA Network Working Group Report IEN-157, Bolt Beranek and
        Newman, September 1980.

   [4]  Jones, R.G., " A Proposal for Simple Measurement Support for
        Users", DARPA Network Working Group Report IEN-161, University
        College London, November 1980.






D. L. Mills
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