mojave man page for pcap_can_set_rfmon

PCAP_CAN_SET_RFMON(3PCAP)												 PCAP_CAN_SET_RFMON(3PCAP)

NAME
       pcap_can_set_rfmon - check whether monitor mode can be set for a not-yet-activated capture handle

SYNOPSIS
       #include <pcap/pcap.h>

       int pcap_can_set_rfmon(pcap_t *p);

DESCRIPTION
       pcap_can_set_rfmon() checks whether monitor mode could be set on a capture handle when the handle is activated.

RETURN VALUE
       pcap_can_set_rfmon() returns 0 if monitor mode could not be set, 1 if monitor mode could be set, and a negative value on error.	A negative
       return value indicates what error condition occurred.  The possible error values are:

       PCAP_ERROR_NO_SUCH_DEVICE
	      The capture source specified when the handle was created doesn't exist.

       PCAP_ERROR_PERM_DENIED
	      The process doesn't have permission to check whether monitor mode could be supported.

       PCAP_ERROR_ACTIVATED
	      The capture handle has already been activated.

       PCAP_ERROR
	      Another error occurred.  pcap_geterr() or pcap_perror() may be called with p as an argument to fetch or display a message describing
	      the error.

       Additional  error  codes  may  be  added in the future; a program should check for 0, 1, and negative, return codes, and treat all negative
       return codes as errors.	pcap_statustostr() can be called, with a warning or error code as an argument, to fetch a message  describing  the
       warning or error code.

SEE ALSO
       pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP), pcap_set_rfmon(3PCAP)

								  3 January 2014					 PCAP_CAN_SET_RFMON(3PCAP)