.TH tcp-environ 5

.SH NAME

tcp-environ \- TCP-related environment variables

.SH DESCRIPTION

The following environment variables

describe a TCP connection.

They are set up by

.BR tcp-env ,

.BR tcpclient ,

and

.BR tcpserver .

Note that

.BR TCPLOCALHOST ,

.BR TCPREMOTEHOST ,

and

.B TCPREMOTEINFO

can contain arbitrary characters.

.TP 5

PROTO

The string

.BR TCP .

.TP 5

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,

.B TCPLOCALHOST

is not set.

.TP 5

TCPLOCALIP

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

.TP 5

TCPLOCALPORT

The local TCP port number, in decimal.

.TP 5

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,

.B TCPREMOTEHOST

is not set.

.TP 5

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,

.B TCPREMOTEINFO

is not set.

.TP 5

TCPREMOTEIP

The IP address of the remote host.

.TP 5

TCPREMOTEPORT

The remote TCP port number.

.SH "SEE ALSO"

tcpclient(1),

tcpserver(1),

tcp-env(1),

tcp(4)