1PCAP_LOOKUPNET(3PCAP)                                    PCAP_LOOKUPNET(3PCAP)
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NAME

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

9       #include <pcap/pcap.h>
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11       char errbuf[PCAP_ERRBUF_SIZE];
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13       int pcap_lookupnet(const char *device, bpf_u_int32 *netp,
14               bpf_u_int32 *maskp, char *errbuf);
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DESCRIPTION

17       pcap_lookupnet()  is used to determine the IPv4 network number and mask
18       associated with the network device device.  Both  netp  and  maskp  are
19       bpf_u_int32 pointers.
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RETURN VALUE

22       pcap_lookupnet()  returns  0  on  success  and -1 on failure.  If -1 is
23       returned, errbuf is  filled  in  with  an  appropriate  error  message.
24       errbuf is assumed to be able to hold at least PCAP_ERRBUF_SIZE chars.
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SEE ALSO

27       pcap(3PCAP)
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31                                 5 April 2008            PCAP_LOOKUPNET(3PCAP)
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