Jump to content
  • Advertisement
Sign in to follow this  
LonelyStar

Getting systems MTU

This topic is 4854 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

Hello together, Is there a way to determine form a c++ programm the currents system maximum MTU? I am looking for a windows and a linux solution!

Share this post


Link to post
Share on other sites
Advertisement
The MTU is part of device configuration, and thus isn't very portable.

On Linux, you can open the device in question (if you can figure out which device it is) and issue an ioctl with SIOCGIFMTU as the operation.

Share this post


Link to post
Share on other sites
On Windows, there's a RegKey which stores the MTU. if this RegKey doesn't exists, Windows uses a default value (1492 I think, but i'm not really sure about it).

the reg key is:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\[Adapter]\MTU

(source: http://www.winguides.com/registry/display.php/280/)

Share this post


Link to post
Share on other sites
Sign in to follow this  

  • Advertisement
×

Important Information

By using GameDev.net, you agree to our community Guidelines, Terms of Use, and Privacy Policy.

We are the game development community.

Whether you are an indie, hobbyist, AAA developer, or just trying to learn, GameDev.net is the place for you to learn, share, and connect with the games industry. Learn more About Us or sign up!

Sign me up!