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