pcap_can_set_rfmon(3) - NetBSD Manual Pages

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PCAP_CAN_SET_RFMON(3)                                    PCAP_CAN_SET_RFMON(3)

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 cap- ture 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: 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.
pcap(3), pcap_create(3), pcap_activate(3), pcap_set_rfmon(3) 31 July 2016 PCAP_CAN_SET_RFMON(3)
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