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Section: Misc. Reference Manual Pages (tcp-environ)
Updated: 5
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NAME
tcp-environ - TCP-related environment variables
DESCRIPTION
The following environment variables
describe a TCP connection.
They are set up by
tcpclient
and
tcpserver
as well as
sslclient
and
sslserver.
Note that
TCPLOCALHOST,
TCP6LOCALHOST,
TCPREMOTEHOST,
TCP6REMOTEHOST,
and
TCPREMOTEINFO,
TCP6REMOTEINFO,
can contain arbitrary characters.
- PROTO
-
The string
TCP,
or
TCP6.
- TCPLOCALHOST/TCP6LOCALHOST
-
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,
TCP6LOCALHOST
is not set.
- TCPLOCALIP
-
The IPv4 address of the local host, in dotted-decimal form.
- TCP6LOCALIP
-
The compactified IPv6 address of the local host.
- TCPLOCALPORT/TCP6LOCALPORT
-
The local TCP port number, in decimal.
- TCPREMOTEHOST/TCP6RMOTEHOST
-
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
or
TCP6REMOTEHOST
is not set.
- TCPREMOTEINFO/TCP6REMOTEINFO
-
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,
TCP6REMOTEINFO
is not set.
- TCPREMOTEIP
-
The IPv4 address of the remote host.
- TCP6REMOTEIP
-
The IPv6 address of the remote host.
- TCPREMOTEPORT/TCP6REMOTEPORT
-
The remote TCP port number.
- TCP6INTERFACE
-
contains the interface name for IPv6 connections.
SEE ALSO
tcpclient(1),
tcpserver(1),
sslclient(1),
sslserver(1),
tcp(4)
Index
- NAME
-
- DESCRIPTION
-
- SEE ALSO
-
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