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PCAP_CAN_SET_RFMON(3) Library Functions Manual 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 er- ror 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 de- scribing 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 re- turn codes as errors. pcap_statustostr(3) 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) 31 July 2016 PCAP_CAN_SET_RFMON(3)