TCP/IPX Connection Mib Specification

Status of this Memo

This document defines an Experimental Protocol for the Internet community. This does not specify an Internet standard of any kind. Discussion and suggestions for improvement are requested. Distribution of this memo is unlimited.

IESG Note:

Internet Engineering Steering Group comment from the Area Director for Transport Services: Please note well that this memo is an individual product of the author. Implementation experience, particularly on the effectiveness of the protocols in dual-stack environments, is needed.

1. Introduction

Traditionally, TCP and UDP runs over IP. STD 17, RFC 1213 defines TCP connection MIB object and UDP listener object assuming just that. For TCP and UDP running over IPX, tcpConnTable and udpTable objects from RFC 1213 cannot be used since they define the address to be of type IpAddress. As such, we need to define new objects that can properly describe TCP and UDP connections over IPX.

New MIB objects, tcpIpxConnTable, udpIpxTable, tcpUnspecConnTable and udpUnspecTable are presented in this paper, to be used in place of tcpConnTable and udpListenerTable when TCP and UDP are running over IPX.

2. Objects

TCPIPX-MIB DEFINITIONS ::= BEGIN

IMPORTS

OBJECT-TYPE

FROM RFC-1212;

-- IPX address type.
-- First 4 octests are the network numbers and the last 6 -- octests are the node numbers. In ascii, it is represented

        -- as hex digits, as in:  nnnnnnnn:mmmmmmmmmmmm
        
        IpxAddress ::= OCTET STRING (size (10))
        
           -- TCP/IPX MIB object idenfifiers
        
        novell        OBJECT IDENTIFIER ::= { enterprises 23 }
        mibDoc        OBJECT IDENTIFIER ::= { novell 2 }
        tcpx          OBJECT IDENTIFIER ::= { mibDoc 29 }
        tcpxTcp       OBJECT IDENTIFIER ::= { tcpx 1 }
        tcpxUdp       OBJECT IDENTIFIER ::= { tcpx 2 }
        
          -- the TCP/IPX Connection table

-- The TCP/IPX connection table contains information

-- about this entity's existing TCP connections over

-- IPX.

tcpIpxConnTable OBJECT-TYPE

               SYNTAX  SEQUENCE OF TcpIpxConnEntry
               ACCESS  not-accessible
               STATUS  mandatory
               DESCRIPTION
                       "A table containing information specific on
                       TCP connection over IPX network layer."
               
               ::= { tcpxTcp 1 }

tcpIpxConnEntry OBJECT-TYPE

               SYNTAX  TcpIpxConnEntry
               ACCESS  not-accessible
               STATUS  mandatory
               DESCRIPTION
                       "Information about a particular current TCP
                       connection over IPX  An object of this type is
                       transient, in that it ceases to exist when (or
                       soon after) the connection makes the transition
                       to the CLOSED state."
               INDEX   { tcpIpxConnLocalAddress,
                         tcpIpxConnLocalPort,
                         tcpIpxConnRemAddress,
                         tcpIpxConnRemPort }
              ::= { tcpIpxConnTable 1 }

TcpIpxConnEntry ::=

               SEQUENCE {
                   tcpIpxConnState
                       INTEGER,
                   tcpIpxConnLocalAddress
                       IpxAddress
                   tcpIpxConnLocalPort
                       INTEGER (0..65535),
                   tcpIpxConnRemAddress
                       IpxAddress,
                   tcpIpxConnRemPort
                       INTEGER (0..65535)
               }

tcpIpxConnState OBJECT-TYPE

               SYNTAX  INTEGER {
                           closed(1),
                           listen(2),
                           synSent(3),
                           synReceived(4),
                           established(5),
                           finWait1(6),
                           finWait2(7),
                           closeWait(8),
                           lastAck(9),
                           closing(10),
                           timeWait(11),
                           deleteTCB(12)
                       }
               ACCESS  read-write
               STATUS  mandatory
               DESCRIPTION
                       "The state of this TCP connection.

The only value which may be set by a management station is deleteTCB(12). Accordingly, it is appropriate for an agent to return a `badValue' response if a management station attempts to set this object to any other value.

If a management station sets this object to the value deleteTCB(12), then this has the effect of deleting the TCB (as defined in RFC 793) of the corresponding connection on the managed node, resulting in immediate termination of the connection.

As an implementation-specific option, a RST segment may be sent from the managed node to the other TCP endpoint (note however that RST

                       segments are not sent reliably)."
               ::= { tcpIpxConnEntry 1 }

tcpIpxConnLocalAddress OBJECT-TYPE

               SYNTAX  IpxAddress
               ACCESS  read-only
               STATUS  mandatory
               DESCRIPTION
                       "The local IPX address for this TCP connection.
                       In the case of a connection in the listen state
                       which is willing to accept connections for any
                       interface, the value 00000000:000000000000 is
                       used.  See tcpUnspecConnTable for connections in
                       the listen  state which is willing to accept
                       connects for any IP interface associated with
                       the node."
               ::= { tcpIpxConnEntry 2 }

-- NetworkAddress defined in SMI only include IP currently, -- so we can't use it to represent both IP and IPX address.

tcpIpxConnLocalPort OBJECT-TYPE

               SYNTAX  INTEGER (0..65535)
               ACCESS  read-only
               STATUS  mandatory
               DESCRIPTION
                       "The local port number for this TCP connection."
               ::= { tcpIpxConnEntry 3 }

tcpIpxConnRemAddress OBJECT-TYPE

               SYNTAX  IpxAddress
               ACCESS  read-only
               STATUS  mandatory
               DESCRIPTION
                       "The remote IPX address for this TCP connection."
               ::= { tcpIpxConnEntry 4 }

tcpIpxConnRemPort OBJECT-TYPE

               SYNTAX  INTEGER (0..65535)
               ACCESS  read-only
               STATUS  mandatory
               DESCRIPTION
                       "The remote port number for this TCP connection."
               ::= { tcpIpxConnEntry 5 }
           
           -- the UDP Listener table

-- The UDP listener table contains information about this -- entity's UDP end-points on which a local application is -- currently accepting datagrams.

udpIpxTable OBJECT-TYPE

               SYNTAX  SEQUENCE OF UdpIpxEntry
               ACCESS  not-accessible
               STATUS  mandatory
               DESCRIPTION
                       "A table containing UDP listener information."
               ::= { tcpxUdp 1 }

udpIpxEntry OBJECT-TYPE

               SYNTAX  UdpIpxEntry
               ACCESS  not-accessible
               STATUS  mandatory
               DESCRIPTION
                       "Information about a particular current UDP
                       listener."
               INDEX   { udpIpxLocalAddress, udpIpxLocalPort }
               ::= { udpIpxTable 1 }

UdpIpxEntry ::=

               SEQUENCE {
                   udpIpxLocalAddress
            IpxAddress
                   udpIpxLocalPort
                       INTEGER (0..65535)
               }

udpIpxLocalAddress OBJECT-TYPE

               SYNTAX  IpxAddress
               ACCESS  read-only
               STATUS  mandatory
               DESCRIPTION
                       "The local IPX address for this UDP listener.  In
                       the case of a UDP listener which is willing to
                       accept datagrams for any interface, the value
                       00000000:000000000000 is used.  See
                       udpUnspecTable for UDP listener which is
                       willing to accept datagrams from any network
                       layer."
               ::= { udpIpxEntry 1 }

udpIpxLocalPort OBJECT-TYPE

               SYNTAX  INTEGER (0..65535)
               ACCESS  read-only
               STATUS  mandatory
               DESCRIPTION
                       "The local port number for this UDP listener."
               ::= { udpIpxEntry 2 }
           
           -- the TCP/UNSPEC Connection table

-- The TCP/UPSPEC connection table contains information -- about this entity's existing TCP connections over -- unspecified network.
-- Since the network is unspecified, the network -- address is also unspecified. Hence, this -- connection table does not include any network -- address.

tcpUnspecConnTable OBJECT-TYPE

               SYNTAX  SEQUENCE OF TcpIpxConnEntry
               ACCESS  not-accessible
               STATUS  mandatory
               DESCRIPTION
                       "A table containing information specific on
                       TCP connection over unspecified network layer."
               
               ::= { tcpxTcp 2 }

tcpUnspecConnEntry OBJECT-TYPE

               SYNTAX  TcpUnspecConnEntry
               ACCESS  not-accessible
               STATUS  mandatory
               DESCRIPTION
                       "Information about a particular current TCP
                       connection over unspecified network layer.  An
                       object of this type is transient, in that it
                       ceases to exist when the connection makes
                       transition beyond LISTEN state, or when (or
                       soon after) the connection makes transition
                       to the CLOSED state,"
               
               INDEX   { tcpUnspecConnLocalPort }
               ::= { tcpUnspecConnTable 1 }

TcpUnspecConnEntry ::=

SEQUENCE {

                   tcpUnspecConnState
                       INTEGER,
                   tcpUnspecConnLocalPort
                       INTEGER (0..65535),
               }

tcpUnspecConnState OBJECT-TYPE

               SYNTAX  INTEGER {
                           closed(1),
                           listen(2),
                           deleteTCB(12)
                       }
               ACCESS  read-write
               STATUS  mandatory
               DESCRIPTION
                       "The state of this TCP connection.

Since the TCP connection can belong to this table only when its state is less than SYN_SENT, only closed and listen state apply.

The only value which may be set by a management station is deleteTCB(12). Accordingly, it is appropriate for an agent to return a `badValue' response if a management station attempts to set this object to any other value.

If a management station sets this object to the value deleteTCB(12), then this has the effect of deleting the TCB (as defined in RFC 793) of the corresponding connection on the managed node, resulting in immediate termination of the connection.

                       As an implementation-specific option, a RST
                       segment may be sent from the managed node to the
                       other TCP endpoint (note however that RST
                       segments are not sent reliably)."
               ::= { tcpUnspecConnEntry 1 }

tcpUnspecConnLocalPort OBJECT-TYPE

               SYNTAX  INTEGER (0..65535)
               ACCESS  read-only
               STATUS  mandatory
               DESCRIPTION
                       "The local port number for this TCP connection."
               ::= { tcpUnspecConnEntry 2 }
           
           -- the UDP Listener table

-- The UDP listener table contains information about this -- entity's UDP end-points over unspecified network layer, -- on which a local application is currently accepting -- datagrams. If network layer is unspecified, the network -- address is also unspecified. Hence, this table does not -- include any network address.

udpUnspecTable OBJECT-TYPE

               SYNTAX  SEQUENCE OF UdpUnspecEntry
               ACCESS  not-accessible
               STATUS  mandatory
               DESCRIPTION
                        "A table containing UDP listener information."
               ::= { tcpxUdp 2 }

udpUnspecEntry OBJECT-TYPE

               SYNTAX  UdpUnspecEntry
               ACCESS  not-accessible
               STATUS  mandatory
               DESCRIPTION
                       "Information about a particular current UDP
                       listener."
               INDEX   { udpUnspecLocalPort }
               ::= { udpUnspecTable 1 }

UdpUnspecEntry ::=

               SEQUENCE {
                   udpUnspecLocalPort
                       INTEGER (0..65535)
               }

udpUnspecLocalPort OBJECT-TYPE

               SYNTAX  INTEGER (0..65535)
               ACCESS  read-only
               STATUS  mandatory
               DESCRIPTION
                       "The local port number for this UDP listener."
               ::= { udpUnspecEntry 1 }
            
            END

Acknowledgement

The author would like to thank following folks and others for their assitance: Greg Minshall, Dave Piscitello.

Security Considerations

Security issues are not discussed in this memo.

Author's Address

Tae Sung
Novell, Inc.
2180 Fortune Drive
San Jose, California, 95131

   Phone: (408)577-8439
   EMail: tae@novell.Com