tcp-environ(5)
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.
