Issue ParthPraim/ns-3-dce/#4

[ParthPratim]

Corresponding DCE Issue : #4

The execution gets stuck on a BUG_ON inside the skb_checksum_help function which is called from skb_csum_hwoffload_help .

It actually looks for the NETIF_F_CSUM_MASK flag here, which is not being set here. Also, the additional CHECKSUM_PARTIAL checks here call skb_checksum_help leadning to a BUG_ON again.

Both of the above have been patched for now, to make tests pass, but these lead to unoredictable results like the dce-iperf-heterogeneous-multihop example (which previously worked) to CRASH at the kernel wait queue due to a NULL pointer.

This is also most probably linked to hardware offloading.

[ParthPratim]

Patch : f528d9c