net: add local_skb parameter to identify local tcp connection

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I7DNAP


CVE: N/A

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Add the local_skb parameter to struct sk_buff to identify the local
connection. Currently, this function is used only on
BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB and BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB
to help the sockops bpf program check whether the current connection is a
local connection. Updating the local_skb variable only when the ACK packet
is sent is sufficient for this function to work.

Signed-off-by: Liu Jian <liujian56@huawei.com>