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PCAP_SETDIRECTION(3PCAP)                                                            PCAP_SETDIRECTION(3PCAP)



NAME
       pcap_setdirection - set the direction for which packets will be captured

SYNOPSIS
       #include <pcap/pcap.h>

       int pcap_setdirection(pcap_t *p, pcap_direction_t d);

DESCRIPTION
       pcap_setdirection()  is  used  to specify a direction that packets will be captured.  d is one of the
       constants PCAP_D_IN, PCAP_D_OUT or PCAP_D_INOUT.  PCAP_D_IN will only capture packets received by the
       device, PCAP_D_OUT will only capture packets sent by the device and PCAP_D_INOUT will capture packets
       received by or sent by the device.  PCAP_D_INOUT is the default  setting  if  this  function  is  not
       called.

       pcap_setdirection()  isn't  necessarily fully supported on all platforms; some platforms might return
       an error for all values, and some other platforms might not support PCAP_D_OUT.

       This operation is not supported if a ``savefile'' is being read.

RETURN VALUE
       pcap_setdirection() returns 0 on success and -1 on failure.  If  -1  is  returned,  pcap_geterr()  or
       pcap_perror() may be called with p as an argument to fetch or display the error text.

SEE ALSO
       pcap(3PCAP), pcap_geterr(3PCAP)



                                                5 April 2008                        PCAP_SETDIRECTION(3PCAP)