documentation about net layer in the kernel

["john paul" <zxcjohn@xxxxxxxxxxx>]

Hello,
Where can I find documentation about net layer in the kernel?

I mean : explanation about metod in
af_unix.c (in /net/unix)  or af_inet.c (in /net/ipv4).
For example:
what is unix_find_other() method for ?
why is it called in unix_dgram_connect()
and in unix_stream_connect()

details about establishing the TCP/UDP connection , the
difference - from kernel point of view - between DGRAM and STREAM (TCP and 
UDP),
what unix_mkname does, socket lists,
what is sunaddr , unix_peer() methods , locks, etc...

I looked ar the code of these 2 modules and there is not much documentation.
regards,
john

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