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PCAP_SETDIRECTION(3)	   Library Functions Manual	  PCAP_SETDIRECTION(3)

NAME
       pcap_setdirection  -  set  the direction	for which packets will be cap-
       tured

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  de-
       vice,  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 PCAP_ERROR	on failure. If
       PCAP_ERROR is returned, pcap_geterr(3) or pcap_perror(3)	may be	called
       with p as an argument to	fetch or display the error text.

SEE ALSO
       pcap(3)

				 25 July 2018		  PCAP_SETDIRECTION(3)

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO

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