NAME

       pcap_activate - activate a capture handle

SYNOPSIS

       #include <pcap/pcap.h>

       int pcap_activate(pcap_t *p);

DESCRIPTION

       pcap_activate()  is  used to activate a packet capture handle to look at packets on the network, with the
       options that were set on the handle being in effect.

RETURN VALUE

       pcap_activate() returns 0 on success without warnings, PCAP_WARNING_PROMISC_NOTSUP on success on a device
       that doesn't support promiscuous mode if promiscuous mode was requested,  PCAP_WARNING_TSTAMP_TYPE_NOTSUP
       on  success if the time stamp type specified in a previous pcap_set_tstamp_type() call isn't supported by
       the capture source (the time stamp type is left as the default), PCAP_WARNING on success with  any  other
       warning,  PCAP_ERROR_ACTIVATED if the handle has already been activated, 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 open the capture source, PCAP_ERROR_PROMISC_PERM_DENIED  if  the  process  has
       permission  to  open  the  capture  source  but  doesn't have permission to put it into promiscuous mode,
       PCAP_ERROR_RFMON_NOTSUP if monitor mode was specified but the  capture  source  doesn't  support  monitor
       mode,  PCAP_ERROR_IFACE_NOT_UP if the capture source is not up, and PCAP_ERROR if another error occurred.
       If PCAP_WARNING or PCAP_ERROR is returned, pcap_geterr() or pcap_perror() may be  called  with  p  as  an
       argument  to fetch or display a message describing the warning or error.  If PCAP_WARNING_PROMISC_NOTSUP,
       PCAP_ERROR_NO_SUCH_DEVICE, or PCAP_ERROR_PERM_DENIED is returned, pcap_geterr() or pcap_perror()  may  be
       called  with  p as an argument to fetch or display an message giving additional details about the problem
       that might be useful for debugging the problem if it's unexpected.

SEE ALSO

       pcap(3PCAP)

                                                21 September 2010                           PCAP_ACTIVATE(3PCAP)