1 .TH tcp-environ 5

     2 .SH NAME

     3 tcp-environ \- TCP-related environment variables

     4 .SH DESCRIPTION

     5 The following environment variables

     6 describe a TCP connection.

     7 They are set up by

     8 .BR tcp-env ,

     9 .BR tcpclient ,

    10 and

    11 .BR tcpserver .

    12 Note that

    13 .BR TCPLOCALHOST ,

    14 .BR TCPREMOTEHOST ,

    15 and

    16 .B TCPREMOTEINFO

    17 can contain arbitrary characters.

    18 .TP 5

    19 PROTO

    20 The string

    21 .BR TCP .

    22 .TP 5

    23 TCPLOCALHOST

    24 The domain name of the local host,

    25 with uppercase letters converted to lowercase.

    26 If there is no currently available domain name

    27 for the local IP address,

    28 .B TCPLOCALHOST

    29 is not set.

    30 .TP 5

    31 TCPLOCALIP

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

    33 .TP 5

    34 TCPLOCALPORT

    35 The local TCP port number, in decimal.

    36 .TP 5

    37 TCPREMOTEHOST

    38 The domain name of the remote host,

    39 with uppercase letters converted to lowercase.

    40 If there is no currently available domain name

    41 for the remote IP address,

    42 .B TCPREMOTEHOST

    43 is not set.

    44 .TP 5

    45 TCPREMOTEINFO

    46 A connection-specific string, perhaps a username,

    47 supplied by the remote host

    48 via 931/1413/IDENT/TAP.

    49 If the remote host did not supply connection information,

    50 .B TCPREMOTEINFO

    51 is not set.

    52 .TP 5

    53 TCPREMOTEIP

    54 The IP address of the remote host.

    55 .TP 5

    56 TCPREMOTEPORT

    57 The remote TCP port number.

    58 .SH "SEE ALSO"

    59 tcpclient(1),

    60 tcpserver(1),

    61 tcp-env(1),

    62 tcp(4)