Manual Pages  — PCAP_CAN_SET_RFMON

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

SYNOPSIS DESCRIPTION RETURN VALUE SEE ALSO

#include <pcap/pcap.h>

int pcap_can_set_rfmon(pcap_t *p);

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

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(3) or  pcap_perror(3) 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(3) can be called, with a warning or error code as an argument, to fetch a message describing the warning or error code.