net/icmpv4: Create reply taking taking into account the IPv4 hdr lengh

Now that IPv4 options are handled, ICMPv4 echo reply must be created
taking into account that IPv4 header length can be variable. So instead
of cloning and rewriting (that would copy the useless options), let's
allocate and copy only the payload.

Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
1 file changed