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(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.

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

                                 31 July 2016        PCAP_CAN_SET_RFMON(3PCAP)