PCAP_LOOKUPNET(3PCAP) PCAP_LOOKUPNET(3PCAP)
NAME
pcap_lookupnet - find the IPv4 network number and netmask for a device
SYNOPSIS
#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);
DESCRIPTION
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 -1 on failure. If -1 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.
SEE ALSO
pcap(3)
5 April 2008 PCAP_LOOKUPNET(3PCAP)
libpcap 1.0.0 - Generated Thu Oct 30 07:32:09 CDT 2008