Can anybody tell me how i can get the ethernet adpater's MAC address using C API. My OS is SCO openserver 5.0.5. Please attach your code sample. Thank you.

I don't have a sco machine to test this against. Apologies for this not being a C answer. Flavor to suit. On my linux machine, ifconfig -a produces this output ifconfig -a eth0 Link encap:Ethernet HWaddr 00:50:04:16:65:04 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:100 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) Interrupt:5 Base address:0x9c00 I can get the mac address: MAC=`ifconfig -a | \ grep 'HWaddr' | \ head -1 | \ awk '{ print $5 }'` echo $MAC

thank u, I know on SCO i can use "ndstat" to get MAC address, but i need C API to do it, how can i do?

actually, you can do that same thing without the head and grep command since awk has that built right into it, as such: echo `ifconfig -a | awk /ether/'{ print $2 }'` gives you the same results, but on some *nix machines it shows "ether" before the mac address rather then "HWaddr". but i'm still wondering how one would get a MAC address of an IP OUTSIDE a network to track customers for billing purposes (ISP-related)