linux - Extract PID from sk_buff. -

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i looking way determine process sk_buff directed. know there no straightforward way that. obtain sk_buff i'm using netif_rx notifier. i've had use notifiers instead of netfilter, because netfilter works in interrupt context (but, if netfilter can in way more usefull in case, can switch).
i've tried far:
struct pid *sk_peer_pid struct sock *.
compare struct file * opened file descriptors struct files_struct of each task. heavy.
network namespaces. useless, since processes use same namespace, , feature not enabled default on device.

last idea compare somehow destination port packet, ports processes listening. there way that? desired port number packet, , up, , see process listening on it?


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