unsigned long deviceIPAddress(const char *itfName, char *hw_address)
{
unsigned long theAddr = LOCALHOST;
InitAddresses();
GetIPAddresses();
GetHWAddresses();
int i = 0;
while(i++ < MAXADDRS)
{
if (ip_addrs[i] == 0)
break;
if (ip_addrs[i] == LOCALHOST)
continue;
if ((if_names[i] != NULL) && strcmp(if_names[i], itfName) == 0)
{
theAddr = ip_addrs[i];
if(hw_address != NULL)
strcpy(hw_address, hw_addrs[i]);
break;
}
}
FreeAddresses();
//this will get you the right IP from your device in format like 198.111.222.444. If you use the for loop above you will se that ip_names array will also contain localhost IP 127.0.0.1 that's why I don't use it. Eventualy this was code from mac that's why it uses arrays for ip_names as macs can have multiple IPs
return theAddr;
}
void FreeAddresses() {
int i;
for (i=0; i<MAXADDRS; ++i) {
if (if_names[i] != 0) free(if_names[i]);
if (ip_names[i] != 0) free(ip_names[i]);
if (hw_addrs[i] != 0) free(hw_addrs[i]);
ip_addrs[i] = 0;
}
InitAddresses();
}
