pcap_can_set_rfmon3pcap
Check whether monitor mode can be set for a not-yet-activated capture handle
Usage
#include <pcap/pcap.h>
int pcap_can_set_rfmon(pcap_t *p);
Overview
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(3PCAP)orpcap_perror(3PCAP) 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(3PCAP) can be called, with a warning or error code as an argument, to fetch a message describing the warning or error code.
Releases
90 releases since Mac OS X 10.6; the text changed 6 times.