NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON
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(3PCAP).
pcap_setfilter() 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(3PCAP) or pcap_perror(3PCAP) may be called with p as an argument to fetch or display the error text.
This page is part of the libpcap (packet capture library) project. Information about the project can be found at ⟨http://www.tcpdump.org/⟩. If you have a bug report for this manual page, see ⟨http://www.tcpdump.org/#patches⟩. This page was obtained from the project's upstream Git repository ⟨https://github.com/the-tcpdump-group/libpcap.git⟩ on 2022-12-17. (At that time, the date of the most recent commit that was found in the repository was 2022-12-13.) If you discover any rendering problems in this HTML version of the page, or you believe there is a better or more up-to-date source for the page, or you have corrections or improvements to the information in this COLOPHON (which is not part of the original manual page), send a mail to email@example.com 5 March 2022 PCAP_SETFILTER(3PCAP)