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pcap_setfilter.3pcap

NAME

pcap_setfilter - set the filter

SYNOPSIS

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

DESCRIPTION

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().

RETURN VALUE

pcap_setfilter() 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_compile(3PCAP), pcap_geterr(3PCAP)