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PCAP_SETFILTER(3) FreeBSD Library Functions Manual PCAP_SETFILTER(3)

pcap_setfilter - set the filter

#include <pcap/pcap.h>
int pcap_setfilter(pcap_t *p, struct bpf_program *fp);

pcap_setfilter() is used to specify a filter program. fp is a pointer to a bpf_program struct, usually the result of a call to pcap_compile(3).

pcap_setfilter() 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.

pcap(3)
25 July 2018

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