WinPcap 1

Get Device name & network & subnetmask

#include<pcap.h>
#pragma comment(lib,"ws2_32.lib")
#pragma comment(lib,"wpcap.lib")
#pragma warning(disable:4996)
 
int main(void)
{
    char *dev;                    // device name;
    pcap_t *pd;                   // packet descripter
    bpf_u_int32 net, subnet;      // network, subnetmask
    char errbuf[PCAP_ERRBUF_SIZE];    // error buffer
    struct in_addr net_addr, subnet_addr;    // for print
 
    if (!(dev = pcap_lookupdev(errbuf)))    // find device
    {
        printf("[!] Error : pcap_lookupdev\n");
        return -1;
    }
    if (pcap_lookupnet(dev, &net, &subnet, errbuf) < 0)    // get network, subnetmask
    {
        printf("[!] Error : pcap_lookupnet\n");
        return -1;
    }
    net_addr.s_addr = net;
    subnet_addr.s_addr = subnet;
    printf("[*] Device        :    %s\n", dev);
    printf("[*] Network       :    %s\n", inet_ntoa(net_addr));
    printf("[*] Subnetmask    :    %s\n", inet_ntoa(subnet_addr));
    return 0;
}