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:
The capture source specified when the handle was created
The process doesn't have permission to check whether
monitor mode could be supported.
The capture handle has already been activated.
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.
This page is part of the libpcap (packet capture library)
project. Information about the project can be found at
⟨http://www.tcpdump.org/⟩. If you have a bug report for this
manual page, see ⟨http://www.tcpdump.org/#patches⟩. This page
was obtained from the project's upstream Git repository
⟨https://github.com/the-tcpdump-group/libpcap.git⟩ on 2021-08-27.
(At that time, the date of the most recent commit that was found
in the repository was 2021-08-17.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
31 July 2016 PCAP_CAN_SET_RFMON(3PCAP)