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Utilities & Libraries
Devctl and Ioctl Commands
DCMD_PTPD_*
DCMD_PTPD_INFO
Get the peer delay and neighbor rate ratio

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      - DCMD_PTPD_DELAYMS
        Get the master-to-slave delay
      - DCMD_PTPD_DELAYSM
        Get the slave-to-master delay
      - DCMD_PTPD_GET_PDELAY_INTERVAL
        Get the pdelay interval
      - DCMD_PTPD_GET_TAI_UTC_OFFSET
        Get the offset from TAI to UTC
      - DCMD_PTPD_GET_TIME
        Get the current time
      - DCMD_PTPD_INFO
        Get the peer delay and neighbor rate ratio
      - DCMD_PTPD_SEND_SIGNALING_MSG
        Send a signaling message
      - DCMD_PTPD_SET_PDELAY_INTERVAL
        Set the pdelay interval
      - DCMD_PTPD_STATUS
        Get the error status for the Precision Time Protocol
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DCMD_PTPD_INFO

QNX SDP8.0Devctl and Ioctl CommandsDeveloper

Get the peer delay and neighbor rate ratio

Synopsis:

#include <dcmd_ptpd.h>

#define DCMD_PTPD_INFO   __DIOF(_DCMD_NET, 13, MyPTPDINFOInternal )

Arguments to devctl():


Argument	Value
`filedes`	A file descriptor that you obtained by opening /dev/ptpd
`dcmd`	DCMD_PTPD_INFO
`dev_data_ptr`	A pointer to a MyPTPDINFOInternal structure
`n_bytes`	`sizeof(MyPTPDINFOInternal)`
`dev_info_ptr`	NULL

Description:

This command gets information about the Precision Time Protocol.

Note:

To use this command, you must specify the -K option when you start ptpd2.

Input:

None.

Output:

A filled-in MyPTPDINFOInternal structure, which is defined in <dcmd_ptpd.h> as follows:

typedef struct {
	int64_t peerdelay;
	int32_t neighborrateratio;
	uint8_t	neighborrateratio_valid;
} MyPTPDINFOInternal;

The members include:

peerdelay: The delay calculated from the timestamps of messages sent between two peers.
neighborrateratio: The neighbor rate ratio, which is used to adjust for the differences in frequencies between the clocks in adjacent devices on the network.
neighborrateratio_valid: Nonzero if the neighborrateratio member is valid.

Example:

See DCMD_PTPD_DELAYMS

See also:

DCMD_PTPD_DELAYMS, DCMD_PTPD_DELAYSM, DCMD_PTPD_GET_PDELAY_INTERVAL, DCMD_PTPD_GET_TAI_UTC_OFFSET, DCMD_PTPD_GET_TIME, DCMD_PTPD_SEND_SIGNALING_MSG, DCMD_PTPD_SET_PDELAY_INTERVAL, DCMD_PTPD_STATUS

devctl() in the QNX OS C Library Reference

ptpd2 in the Utilities Reference

Page updated: August 11, 2025