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 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.

SEE ALSO

       pcap(3PCAP)

                                                  25 July 2018                             PCAP_LOOKUPNET(3PCAP)