pcap_lookupnet3pcap
Find the ipv4 network number and netmask for a device
Usage
#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);
Overview
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.
Return value
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.
Releases
90 releases since Mac OS X 10.6; the text changed 5 times.