Hi, I'm trying to preprocess packets that don't match flowtable before they are sent to the controller via PacketIn message.I found in ofproto/connmgr.c, function connmgr_send_async_msg() is given a struct ofproto_async_msg *am , encode and send a PacketIn message to the controller. I tried to read the source/dest ip and source/dest port of the captured packet by access am>pin.up.base.flow_metadata.flow but all fields are 0 except in_port. Is it the correct way to access the metadata of the captured packet? If I'm misunderstanding, how can I get the metadata of the captured packet in user space before it's sent to the controller?
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