pcap_setdirection(3) - NetBSD Manual Pages

Command: Section: Arch: Collection:  
PCAP_SETDIRECTION(3)                                      PCAP_SETDIRECTION(3)

pcap_setdirection - set the direction for which packets will be cap- tured
#include <pcap/pcap.h> int pcap_setdirection(pcap_t *p, pcap_direction_t d);
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.
pcap_setdirection() returns 0 on success, PCAP_ERROR_NOT_ACTIVATED if called on a capture handle that has been created but not activated, or PCAP_ERROR on other errors. If PCAP_ERROR is returned, pcap_geterr(3) or pcap_perror(3) may be called with p as an argument to fetch or dis- play the error text.
pcap(3) 5 March 2022 PCAP_SETDIRECTION(3)
Powered by man-cgi (2024-03-20). Maintained for NetBSD by Kimmo Suominen. Based on man-cgi by Panagiotis Christias.