pcap_can_set_rfmon(3) - NetBSD Manual Pages

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PCAP_CAN_SET_RFMON(3)                                    PCAP_CAN_SET_RFMON(3)




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 cap-
       ture 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() or pcap_perror()  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() can be called, with a warn-
       ing  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)



                                3 January 2014           PCAP_CAN_SET_RFMON(3)