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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | COLOPHON |
PCAP_LOOKUPNET(3PCAP) PCAP_LOOKUPNET(3PCAP)
pcap_lookupnet - find the IPv4 network number and netmask for a
device
#include <pcap/pcap.h>
char errbuf[PCAP_ERRBUF_SIZE];
int pcap_lookupnet(const char *device, bpf_u_int32 *netp,
bpf_u_int32 *maskp, char *errbuf);
pcap_lookupnet() is used to determine the IPv4 network number and
mask associated with the network device device. Both netp and maskp
are bpf_u_int32 pointers.
pcap_lookupnet() returns 0 on success and PCAP_ERROR on failure. If
PCAP_ERROR is returned, errbuf is filled in with an appropriate error
message. errbuf is assumed to be able to hold at least
PCAP_ERRBUF_SIZE chars.
pcap(3PCAP)
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 2020-08-13.
(At that time, the date of the most recent commit that was found in
the repository was 2020-08-10.) If you discover any rendering prob‐
lems in this HTML version of the page, or you believe there is a bet‐
ter 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 man-pages@man7.org
25 July 2018 PCAP_LOOKUPNET(3PCAP)