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| .TH PCAP_SETFILTER 3PCAP "5 April 2008" |
| .SH NAME |
| pcap_setfilter \- set the filter |
| .SH SYNOPSIS |
| .nf |
| .ft B |
| #include <pcap/pcap.h> |
| .ft |
| .LP |
| .ft B |
| int pcap_setfilter(pcap_t *p, struct bpf_program *fp); |
| .ft |
| .fi |
| .SH DESCRIPTION |
| .B pcap_setfilter() |
| is used to specify a filter program. |
| .I fp |
| is a pointer to a |
| .I bpf_program |
| struct, usually the result of a call to |
| .BR pcap_compile() . |
| .SH RETURN VALUE |
| .B pcap_setfilter() |
| returns 0 on success and \-1 on failure. |
| If \-1 is returned, |
| .B pcap_geterr() |
| or |
| .B pcap_perror() |
| may be called with |
| .I p |
| as an argument to fetch or display the error text. |
| .SH SEE ALSO |
| pcap(3PCAP), pcap_compile(3PCAP), pcap_geterr(3PCAP) |