Revert "Remove iOS-specific checks for UDP header size."
Revert "Remove iOS-specific checks for UDP header size."

This reverts commit e6b3961c797fa87236198dbb50c4d663ea2975c0.

Parrot-Developers/libARNetworkAL,kradhub/libARNetworkAL,kradhub/libARNetworkAL,Parrot-Developers/libARNetworkAL,niavok/libARNetworkAL,Parrot-Developers/libARNetworkAL,niavok/libARNetworkAL,Parrot-Developers/libARNetworkAL,kradhub/libARNetworkAL,niavok/libARNetworkAL