[erlang-questions] how to get the factual ip address?

Per Hedeland <>
Thu Oct 30 00:01:59 CET 2008


"Alex Alvarez" <> wrote:
>
>getif/0 and getiflist/0 seem very useful, but shouldn't their output be in
>sync order-wise with each other?
>
>getif/0 in my machine outputs...
>
>{ok,[{{192,168,1,3},{192,168,1,255},{255,255,255,0}},
>     {{127,0,0,1},{0,0,0,0},{255,0,0,0}}]}
>
>, while getiflist/0 outputs...
>
>{ok,["lo","eth0"]}

Yes, that would make sense - seems it's a foldl that should be a foldr
in inet:getif/1. But anyway if you want to know the address for a
specific interface, you can use ifget/2 instead - e.g.:

3> inet:ifget("bge0", [addr]).
{ok,[{addr,{192,168,1,70}}]}

And unfortunately is seems none of the above support the fact that an
interface can have multiple addresses.

--Per Hedeland




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