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NetBSD 6.1.5 - man page for pcap_setdirection (netbsd section 3)

PCAP_SETDIRECTION(3)							     PCAP_SETDIRECTION(3)

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(3), pcap_geterr(3)

					   5 April 2008 		     PCAP_SETDIRECTION(3)


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