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PCAP_LOOKUPNET

Section: Misc. Reference Manual Pages (3PCAP)
Updated: 3 January 2014
Index Return to Main Contents
 

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)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
SEE ALSO


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