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pcap_set_rfmon(3) [freebsd man page]

PCAP_SET_RFMON(3)					     Library Functions Manual						 PCAP_SET_RFMON(3)

NAME
pcap_set_rfmon - set monitor mode for a not-yet-activated capture handle SYNOPSIS
#include <pcap/pcap.h> int pcap_set_rfmon(pcap_t *p, int rfmon); DESCRIPTION
pcap_set_rfmon() sets whether monitor mode should be set on a capture handle when the handle is activated. If rfmon is non-zero, monitor mode will be set, otherwise it will not be set. RETURN VALUE
pcap_set_rfmon() returns 0 on success or PCAP_ERROR_ACTIVATED if called on a capture handle that has been activated. SEE ALSO
pcap(3), pcap_create(3), pcap_activate(3), pcap_can_set_rfmon(3) 5 April 2008 PCAP_SET_RFMON(3)

Check Out this Related Man Page

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, PCAP_ERROR_NO_SUCH_DEVICE if the capture source specified when the handle was created doesn't exist, PCAP_ERROR_PERM_DENIED if the process doesn't have permission to check whether monitor mode could be supported, PCAP_ERROR_ACTIVATED if called on a capture handle that has been activated, or PCAP_ERROR if an error occurred. If PCAP_ERROR is returned, pcap_geterr() or pcap_perror() may be called with p as an argument to fetch or display the error text. SEE ALSO
pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP), pcap_set_rfmon(3PCAP) 18 May 2010 PCAP_CAN_SET_RFMON(3PCAP)
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