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)