pcap_lookupnet.3pcap

Langue: en

Version: 5 April 2008 (debian - 07/07/09)

Section: 3 (Bibliothèques de fonctions)

Sommaire

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)