tcp-environ(5)
NAME
tcp-environ - TCP-related environment variables
DESCRIPTION
The following environment variables describe a TCP connec
tion. 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 cur
rently 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 cur
rently 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 informa
tion, TCPREMOTEINFO is not set. - TCPREMOTEIP
- The IP address of the remote host.
- TCPREMOTEPORT
- The remote TCP port number.