cnet's Application Programming Interface
- NAME
- CNET_carrier_sense - determines if a LT_LAN or LT_WLAN link is busy.
- SYNOPSIS
- #include <cnet.h>
int CNET_carrier_sense(int link);
- DESCRIPTION
-
CNET_carrier_sense indicates if the indicated LT_LAN
or LT_WLAN link is currently transmitting or receiving a signal.
- RETURN VALUE
-
The value 1 is returned if the link is currently
transmitting or receiving a signal.
The value 0 is returned if there is no error,
and the link is neither transmitting nor receiving a signal.
On failure, the value -1 is returned,
and the global variable cnet_errno is set to one of the
following values to describe the error:
- ER_BADLINK
- The value of link is not a valid link number.
- ER_LINKDOWN
- The indicated link is down.
- ER_NOTREADY
- The current node is rebooting.
- ER_NOTSUPPORTED
- The indicated link is not of type LT_LAN or LT_WLAN.
- SEE ALSO
-
CNET_write_physical.
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cnet v3.3.4, written by Chris.McDonald@uwa.edu.au
Last modified: Tue Mar 1 7:43AM 2016