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defmodule SNet.Addr do
def get_if_inet4 do
{:ok, ifs} = :inet.getifaddrs
for {_, opts} <- ifs,
{:addr, addr} <- opts,
tuple_size(addr) == 4,
addr != {127,0,0,1}
do
addr
end
end
def get_pub_inet4 do
Application.ensure_all_started(:inets)
Application.ensure_all_started(:ssl)
{:ok, {_, _, body}} = :httpc.request('http://api.ipify.org')
{:ok, addr} = :inet.parse_address body
addr
end
def get_all_inet4 do
addrset = for x <- get_if_inet4(), into: %MapSet{}, do: x
addrset = MapSet.put(addrset, get_pub_inet4())
MapSet.to_list addrset
end
def is_local?({:inet, ip, port}) do
port == Application.get_env(:shard, :port) and (ip == {127,0,0,1} or ip in get_if_inet4())
end
end
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