title: How to enable UDP checksums
body: <p>I'm working on a project involving UDP socket communication between a VxWorks device and a Linux machine.  In this project, I'd like to take advantage of the checksum field of the UDP header.</p>
  
  <p>It appears that in the VxWorks socket interface, the <code>checksum</code> field of outgoing UDP packets is enabled by default. </p>
  
  <p>However, for the usual Unix sockets interface, there doesn't appear to be any flag or other method to open a UDP socket that will check the checksum for incoming packets and populate it for outgoing ones.</p>
  
  <p>For the usual Unix sockets interface, does such a flag exist?</p>
  
  <p>Thanks!</p>