diff options
Diffstat (limited to 'pcap_can_set_rfmon.3pcap')
| -rw-r--r-- | pcap_can_set_rfmon.3pcap | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/pcap_can_set_rfmon.3pcap b/pcap_can_set_rfmon.3pcap index 07d65d7d..389e50dd 100644 --- a/pcap_can_set_rfmon.3pcap +++ b/pcap_can_set_rfmon.3pcap @@ -37,26 +37,36 @@ the handle is activated. .SH RETURN VALUE .B pcap_can_set_rfmon() returns 0 if monitor mode could not be set, -1 if monitor mode could 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: +.TP .B PCAP_ERROR_NO_SUCH_DEVICE -if the capture source specified when the handle was created doesn't -exist, +The capture source specified when the handle was created doesn't +exist. +.TP .B PCAP_ERROR_PERM_DENIED -if the process doesn't have permission to check whether monitor mode -could be supported, +The process doesn't have permission to check whether monitor mode +could be supported. +.TP .B PCAP_ERROR_ACTIVATED -if called on a capture handle that has been activated, or +The capture handle has already been activated. +.TP .B PCAP_ERROR -if an error occurred. -If -.B PCAP_ERROR -is returned, +Another error occurred. .B pcap_geterr() or .B pcap_perror() may be called with .I p -as an argument to fetch or display the error text. +as an argument to fetch or display a message describing the error. +.LP +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. +.B pcap_statustostr() +can be called, with a warning or error code as an argument, to fetch a +message describing the warning or error code. .SH SEE ALSO pcap(3PCAP), pcap_create(3PCAP), pcap_activate(3PCAP), pcap_set_rfmon(3PCAP) |