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


#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:

The capture source specified when the handle was created doesn't exist.
The process doesn't have permission to check whether monitor mode could be supported.
The capture handle has already been activated.
Another error occurred. pcap_geterr(3PCAP) or pcap_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.


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

31 July 2016