NAME
          tcp-environ - TCP-related environment variables

     DESCRIPTION
          The following environment variables describe a TCP
          connection.  They are set up by tcp-env, tcpclient, and
          tcpserver.  Note that TCPLOCALHOST, TCPREMOTEHOST, and
          TCPREMOTEINFO can contain arbitrary characters.

          PROTO
               The string TCP.

          TCPLOCALHOST
               The domain name of the local host, with uppercase
               letters converted to lowercase.  If there is no
               currently available domain name for the local IP
               address, TCPLOCALHOST is not set.

          TCPLOCALIP
               The IP address of the local host, in dotted-decimal
               form.

          TCPLOCALPORT
               The local TCP port number, in decimal.

          TCPREMOTEHOST
               The domain name of the remote host, with uppercase
               letters converted to lowercase.  If there is no
               currently available domain name for the remote IP
               address, TCPREMOTEHOST is not set.

          TCPREMOTEINFO
               A connection-specific string, perhaps a username,
               supplied by the remote host via 931/1413/IDENT/TAP.  If
               the remote host did not supply connection information,
               TCPREMOTEINFO is not set.

          TCPREMOTEIP
               The IP address of the remote host.

          TCPREMOTEPORT
               The remote TCP port number.

     SEE ALSO
          tcpclient(1), tcpserver(1), tcp-env(1), tcp(4)