18.5 Inetd Environment

If a connection is made with a streaming protocol (‘stream’) and if --environment option has been given, inetd will set the following environment variables before starting the program:

PROTO

Always ‘TCP’.

TCPLOCALIP

Local IP address of the interface which accepted the connection.

TCPLOCALPORT

Port number on which the TCP connection was established.

TCPREMOTEIP

IP address of the remote client.

TCPREMOTEPORT

Port number on the client side of the TCP connection.

Additionally, if given the --remote option, inetd sets the following environment variables:

TCPLOCALHOST

DNS name of TCPLOCALIP.

TCPREMOTEHOST

DNS name of TCPREMOTEIP.