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(3PCAP)