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PCAP_SETDIRECTION

Section: Misc. Reference Manual Pages (3PCAP)
Updated: 8 March 2015
Index Return to Main Contents
 

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)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
SEE ALSO





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