A pending tx packets (called by the action ACTION_TX_HANDLE) which has a list of answer, while the host will be valid when the packet is created, but the host will be invalid while the packet is sending. We should double check the host is still valid when appending the answer to the packets.
There is a risk in this scenario:
A pending tx packets (called by the action ACTION_TX_HANDLE) which has a list of answer, while the host will be valid when the packet is created, but the host will be invalid while the packet is sending. We should double check the host is still valid when appending the answer to the packets.
This PR fix this risk.