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PCAP_LOOKUPNET(3)          Library Functions Manual          PCAP_LOOKUPNET(3)



NAME
       pcap_lookupnet - find the IPv4 network number and netmask for a device

SYNOPSIS
       #include <&lt;pcap/pcap.h>&gt;

       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(3)