PTP_GET_COMPENSATION
Get the current PTP compensation value
Synopsis
#include <io-sock/ptp.h> #define PTP_GET_COMPENSATION 0x105
Arguments to ioctl():
Argument | Value |
---|---|
fd | File descriptor obtained by opening the device |
request | SIOCGDRVSPEC |
Additional argument | A pointer to an ifdrv |
Description
This command gets the current compensation value (from a
ptp_comp
) for the PTP module.
Input
A filled-in ifdrv
structure, defined in net/if.h.
struct ifdrv { char ifd_name[IFNAMSIZ]; unsigned long ifd_cmd; size_t ifd_len; void *ifd_data; };
Fill in each member using the following information:
ifd_name
: The interface name; e.g.,en0
ifd_cmd
:PTP_GET_COMPENSATION
ifd_len
: The size of aptp_comp
structureifd_data
: A pointer to aptp_comp
structure
Output
The ptp_comp
structure pointed to by ifd_data
is filled in with the current compensation value.
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