Name
skb_partial_csum_set —
set up and verify partial csum values for packet
Synopsis
bool skb_partial_csum_set ( | struct sk_buff * skb, |
| | u16 start, |
| | u16 off); |
Arguments
skb
the skb to set
start
the number of bytes after skb->data to start checksumming.
off
the offset from start to place the checksum.
Description
For untrusted partially-checksummed packets, we need to make sure the values
for skb->csum_start and skb->csum_offset are valid so we don't oops.
This function checks and sets those values and skb->ip_summed: if this
returns false you should drop the packet.