tcp-environ(5)

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.

TCPINTERFACE
    The interface name ("eth0") for IPv6 connections using link-local addresses.

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