On Tue, Jul 21, 2020 at 6:17 AM guodeqing <geffrey....@huawei.com> wrote: > > The ip header checksum can be error in the following steps. > $ ip netns add ns1 > $ ip link add gw link eth0 type ipvlan > $ ip addr add 168.16.0.1/24 dev gw > $ ip link set dev gw up > $ ip link add ip1 link eth0 type ipvlan > $ ip link set ip1 netns ns1 > $ ip netns exec ns1 ip link set ip1 up > $ ip netns exec ns1 ip addr add 168.16.0.2/24 dev ip1 > $ ip netns exec ns1 tc qdisc add dev ip1 root netem corrupt 50% > $ ip netns exec ns1 ping 168.16.0.1 > > The ip header of a packet maybe modified when it steps in > ipvlan_process_v4_outbound because of the netem, the corruptted > packets should be dropped.
This does not make much sense, as you intentionally corrupt the header. More importantly, the check you add is too late, right? ipvlan_xmit_mode_l3() already does the addr lookup with IP header, Thanks.
