C Program to make static ARP entries

I need to write a c program to add static entries to the ARP cache.I
read somewhere that we can use the ioctl() function and the arpreq
structure to know the MAC address.This is the only info I could get
related to ARP entries.
Plz suggest how to add static entries in the ARP cache through a
program.The system in linux .I know in windows that one can do arp -s
through the command line.
Plz suggest me pointers to go about.

Like windows you can also add ARP entries to arp table in linux.
The Syntax is:

arp [-v] [<HW>] [-i <if>] -s <hostname> <hwaddr> [temp][nopub]


<HW>=Use '-H <hw>' to specify hardware address type. Default: ether


Regards,
Senthil Murugan