A number of devices are used for X.25 within the system. They are either used for system management or they are mapped to an individual virtual circuit. X.25 virtual circuits may be accessed via STREAMS. For more information, see the Application Programming Interface Guide.
The device /dev/x25pkt allows an application program to scrutinize every Incoming Call packet that arrives before it becomes visible to other programs or processes.
The x25daemon uses this device to collect incoming calls from the network and process them according to the information inx25incalls . It records its activities in /usr/spool/x25/x25dlog.
The X.25 protocol implementation records statistics on every Switched Virtual Circuit call that it processes. This information includes addressing and facilities details, traffic distribution, and duration.
The x25account application collects these statistics from /dev/x25pkt and outputs it to the file /usr/spool/x25/x25acc_log. If you wish to collect accounting information, remove the comment from the x25account startup commands in your system's startup script.
There are two special purpose devices.
/dev/x25frm
This is a STREAMS device that provides a DLPI STREAMS interface to the LAPB, or X.25 HDLC frame layer that runs in the kernel. It is a cloning device that clones to offer multiple X.25 links.
/dev/x25pkt
This is a STREAMS device that provides a STREAMS interface to the X.25 PLP, or Packet Layer that runs in the kernel. It is a cloning device that clones to offer multiple virtual circuits.
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