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%% @doc Utilities related to listener configuration options |
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-module(mongoose_listener_config). |
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-export([ensure_ip_options/1, |
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verify_unique_listeners/1, |
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address_family/1, |
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listener_id/1]). |
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%% @doc Fill in IP-related options that can be calculated automatically. |
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%% Apart from these options, the input should be a complete listener configuration. |
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-spec ensure_ip_options(map()) -> mongoose_listener:options(). |
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ensure_ip_options(Opts = #{ip_address := IPAddr, ip_version := 4}) -> |
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{ok, IPTuple} = inet:parse_ipv4_address(IPAddr), |
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Opts#{ip_tuple => IPTuple}; |
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ensure_ip_options(Opts = #{ip_address := IPAddr, ip_version := 6}) -> |
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:-( |
{ok, IPTuple} = inet:parse_ipv6_address(IPAddr), |
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Opts#{ip_tuple => IPTuple}; |
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ensure_ip_options(Opts = #{ip_address := IPAddr}) -> |
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{ok, IPTuple} = inet:parse_address(IPAddr), |
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Opts#{ip_tuple => IPTuple, |
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ip_version => ip_version(IPTuple)}; |
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ensure_ip_options(Opts = #{ip_version := 6}) -> |
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ensure_ip_options(Opts#{ip_address => "::"}); |
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ensure_ip_options(Opts) -> |
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ensure_ip_options(Opts#{ip_address => "0"}). |
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ip_version(T) when tuple_size(T) =:= 4 -> 4; |
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ip_version(T) when tuple_size(T) =:= 8 -> 6. |
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%% @doc Verify that all listeners have unique socket addresses |
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-spec verify_unique_listeners([mongoose_listener:options()]) -> [mongoose_listener:options()]. |
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verify_unique_listeners(Listeners) -> |
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Counts = lists:foldl(fun(L, Cts) -> |
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maps:update_with(listener_id(L), fun(Ct) -> Ct + 1 end, 1, Cts) |
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end, #{}, Listeners), |
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case [K || {K, V} <- maps:to_list(Counts), V > 1] of |
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[] -> Listeners; |
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Dups -> error(#{what => duplicate_listeners, duplicates => Dups, |
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text => <<"Some listeners have duplicate listening socket addresses">>}) |
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end. |
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-spec address_family(4 | 6) -> inet:address_family(). |
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address_family(4) -> inet; |
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address_family(6) -> inet6. |
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%% @doc Create a unique ID based on the listening socket address |
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-spec listener_id(mongoose_listener:options()) -> mongoose_listener:id(). |
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listener_id(#{port := Port, ip_tuple := IPTuple, proto := Proto}) -> |
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{Port, IPTuple, Proto}. |