Does anybody know how to get all the ip addresses from linux kernel? I can google some code that runs in user mode. But not in kernel.
s = socket(AF_INET, SOCK_STREAM, 0);
if(s < 0)
{
printf("socket screwup\n");
exit(1);
}
memset(&ifr, 0, sizeof(ifr));
ifc.ifc_len = sizeof(buff);
ifc.ifc_buf = buff;
if(ioctl(s, SIOCGIFCONF, &ifc) < 0)
{
printf("SIOCGIFCONF screwed up\n");
exit(1);
}
pifr = (struct ifreq *)(ifc.ifc_req);
for(i = ifc.ifc_len / sizeof(struct ifreq); --i >= 0; pifr++)
{
strcpy(ifr.ifr_name, pifr->ifr_name); //eth0 eth1 ...
if(ioctl(s, SIOCGIFADDR, &ifr) < 0)
{
printf("ip screwed up\n");
exit(1);
}
memcpy(ip, ifr.ifr_addr.sa_data+2, 4);
printf("%s\n",inet_ntoa(*(struct in_addr *)ip));
}
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