[erlang-questions] gen_udp in passive mode

[Francesco Cesarini (Erlang Training and Consulting)]

Running a UDP socket in passive mode, you retrieve the packets using 
gen_udp:recv(Socket, Length). I could not find any reference to what 
Length  is used for in the documentation (Other than being used in 
gen_tcp module when packet types are raw). Is there a reason to have it 
here other than symmetry in the call among the modules?

I recall  a thread on the mailing list some time ago, but might be wrong 
as I could not find any reference to it.

Thanks,
Francesco
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