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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
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