Networking/Discussion/Networking Drivers/ARP API for getting MAC address of an IP address/List of Posts
 
Forum Topic - ARP API for getting MAC address of an IP address: (5 Items)
   
Update
Muralidhar Duvvuri
01/20/2014 12:22 AM
post108021
ARP API for getting MAC address of an IP address   
Is there any API for getting the MAC address for a specified IP address? It looks like there is a SIOCGARP ioctl command
 but it does not work.
Dennis Kellly(deleted)
01/20/2014 7:36 AM
post108025
Re: ARP API for getting MAC address of an IP address   
See SIOCGDRVCOM
Sean Boudreau(deleted)
01/20/2014 9:59 AM
post108034
Re: ARP API for getting MAC address of an IP address   
IP addresses don't have mac addresses.  Interfaces may or may not
have both.  Look at getifaddrs() / freeifaddrs().

-seanb

On Mon, Jan 20, 2014 at 12:22:51AM -0500, Muralidhar Duvvuri wrote:
> Is there any API for getting the MAC address for a specified IP address? It looks like there is a SIOCGARP ioctl 
command but it does not work. 
> 
> 
> 
> _______________________________________________
> 
> Networking Drivers
> http://community.qnx.com/sf/go/post108021
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Muralidhar Duvvuri
01/21/2014 12:30 AM
post108047
Re: ARP API for getting MAC address of an IP address   
Thanks. The getifaddrs looks to populate the IP and MAC addresses of only the interfaces on the current system on which 
the code runs. If I want to retrieve the MAC address of a remote machine using its IP address typically ARP is used. 
However, it looks like QNX does not expose any API for retrieving this information. So, is there any way for me to get 
the MAC address of a remote node, given its IP address?
Sean Boudreau(deleted)
01/21/2014 9:21 AM
post108056
Re: ARP API for getting MAC address of an IP address   
Check out the NetBSD 4 arp utility.  Same applies to QNX:

# arp -an

http://cvsweb.netbsd.org/bsdweb.cgi/src/usr.sbin/arp/?only_with_tag=netbsd-4-0-RELEASE

On Tue, Jan 21, 2014 at 12:30:53AM -0500, Muralidhar Duvvuri wrote:
> Thanks. The getifaddrs looks to populate the IP and MAC addresses of only the interfaces on the current system on 
which the code runs. If I want to retrieve the MAC address of a remote machine using its IP address typically ARP is 
used. However, it looks like QNX does not expose any API for retrieving this information. So, is there any way for me to
 get the MAC address of a remote node, given its IP address?
> 
> 
> 
> _______________________________________________
> 
> Networking Drivers
> http://community.qnx.com/sf/go/post108047
> To cancel your subscription to this discussion, please e-mail drivers-networking-unsubscribe@community.qnx.com

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