Better distinguish between Ranch and socket options

A map should now be used when specifying transport options
that contain more than just socket options. It is still
possible to pass a list of socket options directly as a
convenience.

The ack_timeout is renamed to handshake_timeout when
specified as a map. This corresponds to the new function
ranch:handshake/1,2 that will be favored in Ranch 2.0.

Specifying Ranch-specific options via the proplist will
no longer be possible starting from Ranch 2.0.

doc/src/manual/ranch.asciidoc

@@ -26,17 +26,43 @@ code.
 [source,erlang]
 ----
 opt() = {ack_timeout, timeout()}
-	| {connection_type, worker | supervisor}
-	| {max_connections, max_conns()}
-	| {num_acceptors, pos_integer()}
-	| {shutdown, timeout() | brutal_kill}
-	| {socket, any()}
+      | {connection_type, worker | supervisor}
+      | {max_connections, max_conns()}
+      | {num_acceptors, pos_integer()}
+      | {shutdown, timeout() | brutal_kill}
+      | {socket, any()}
 ----
 
-Ranch-specific transport options.
+Deprecated form for Ranch-specific options.
 
-These options are not passed on to the transports.
-They are used by Ranch while setting up the listeners.
+Please use the `opts()` type when you need to provide
+Ranch-specific transport options. Socket options will
+remain separate from the Ranch-specific options.
+
+=== opts()
+
+[source,erlang]
+----
+opts() = any() | #{
+    connection_type   => worker | supervisor,
+    handshake_timeout => timeout(),
+    max_connections   => max_conns(),
+    num_acceptors     => pos_integer(),
+    shutdown          => timeout() | brutal_kill,
+    socket            => any(),
+    socket_opts       => any()
+}
+----
+
+Transport options.
+
+The transport options are a combination of Ranch-specific
+options and socket options. Socket options may be given
+directly (assuming they are not a map and no Ranch-specific
+option needs to be given) or as part of `socket_opts`.
+
+The different options are described further down in this
+document.
 
 === ref() = any()
 
@@ -46,18 +72,41 @@ Unique name used to refer to a listener.
 
 None of the options are required.
 
-ack_timeout (5000)::
-	Maximum allowed time for the `ranch:handshake/{1,2}` call to finish.
+ack_timeout::
+
+When `ack_timeout` is found in a transport options proplist,
+it is converted to the `handshake_timeout` option from the
+map. They are equivalent. The `ack_timeout` option will be
+removed in Ranch 2.0.
+
 connection_type (worker)::
-	Type of process that will handle the connection.
+
+Type of process that will handle the connection.
+
+handshake_timeout (5000)::
+
+Maximum allowed time for the `ranch:handshake/1,2` call to finish.
+
 max_connections (1024)::
-	Maximum number of active connections. Soft limit. Using `infinity` will disable the limit entirely.
+
+Maximum number of active connections. Soft limit. Using `infinity` will disable the limit entirely.
+
 num_acceptors (10)::
-	Number of processes that accept connections.
+
+Number of processes that accept connections.
+
 shutdown (5000)::
-	Maximum allowed time for children to stop on listener shutdown.
+
+Maximum allowed time for children to stop on listener shutdown.
+
 socket::
-	Listening socket opened externally to be used instead of calling `Transport:listen/1`.
+
+Listening socket opened externally to be used instead of calling `Transport:listen/1`.
+
+socket_opts::
+
+Socket options given to the `Transport:listen/1`. Please refer to the
+documentation of the transport module you are using for more details.
 
 == Exports
 

src/ranch.erl

@@ -48,6 +48,7 @@
 -type max_conns() :: non_neg_integer() | infinity.
 -export_type([max_conns/0]).
 
+%% This type is deprecated and will be removed in Ranch 2.0.
 -type opt() :: {ack_timeout, timeout()}
 	| {connection_type, worker | supervisor}
 	| {max_connections, max_conns()}
@@ -56,28 +57,33 @@
 	| {socket, any()}.
 -export_type([opt/0]).
 
+-type opts() :: any() | #{
+	connection_type => worker | supervisor,
+	handshake_timeout => timeout(),
+	max_connections => max_conns(),
+	num_acceptors => pos_integer(),
+	shutdown => timeout() | brutal_kill,
+	socket => any(),
+	socket_opts => any()
+}.
+-export_type([opts/0]).
+
 -type ref() :: any().
 -export_type([ref/0]).
 
--spec start_listener(ref(), module(), any(), module(), any())
-	-> supervisor:startchild_ret().
-start_listener(Ref, Transport, TransOpts, Protocol, ProtoOpts) ->
-	NumAcceptors = proplists:get_value(num_acceptors, TransOpts, 10),
-	start_listener(Ref, NumAcceptors, Transport, TransOpts, Protocol, ProtoOpts).
-
--spec start_listener(ref(), non_neg_integer(), module(), any(), module(), any())
+-spec start_listener(ref(), module(), opts(), module(), any())
 	-> supervisor:startchild_ret().
-start_listener(Ref, NumAcceptors, Transport, TransOpts, Protocol, ProtoOpts)
-		when is_integer(NumAcceptors) andalso is_atom(Transport)
-		andalso is_atom(Protocol) ->
+start_listener(Ref, Transport, TransOpts0, Protocol, ProtoOpts)
+		when is_atom(Transport), is_atom(Protocol) ->
+	TransOpts = normalize_opts(TransOpts0),
 	_ = code:ensure_loaded(Transport),
 	case erlang:function_exported(Transport, name, 0) of
 		false ->
 			{error, badarg};
 		true ->
-			Res = supervisor:start_child(ranch_sup, child_spec(Ref, NumAcceptors,
+			Res = supervisor:start_child(ranch_sup, child_spec(Ref,
 					Transport, TransOpts, Protocol, ProtoOpts)),
-			Socket = proplists:get_value(socket, TransOpts),
+			Socket = maps:get(socket, TransOpts, undefined),
 			case Res of
 				{ok, Pid} when Socket =/= undefined ->
 					%% Give ownership of the socket to ranch_acceptors_sup
@@ -98,6 +104,59 @@ start_listener(Ref, NumAcceptors, Transport, TransOpts, Protocol, ProtoOpts)
 			maybe_started(Res)
 	end.
 
+-spec start_listener(ref(), non_neg_integer(), module(), opts(), module(), any())
+	-> supervisor:startchild_ret().
+start_listener(Ref, NumAcceptors, Transport, TransOpts0, Protocol, ProtoOpts)
+		when is_integer(NumAcceptors), is_atom(Transport), is_atom(Protocol) ->
+	TransOpts = normalize_opts(TransOpts0),
+	start_listener(Ref, Transport, TransOpts#{num_acceptors => NumAcceptors},
+		Protocol, ProtoOpts).
+
+normalize_opts(Map) when is_map(Map) ->
+	Map;
+normalize_opts(List0) when is_list(List0) ->
+	Map0 = #{},
+	{Map1, List1} = case take(ack_timeout, List0) of
+		{value, HandshakeTimeout, Tail0} ->
+			{Map0#{handshake_timeout => HandshakeTimeout}, Tail0};
+		false ->
+			{Map0, List0}
+	end,
+	{Map, List} = lists:foldl(fun(Key, {Map2, List2}) ->
+		case take(Key, List2) of
+			{value, ConnectionType, Tail2} ->
+				{Map2#{Key => ConnectionType}, Tail2};
+			false ->
+				{Map2, List2}
+		end
+	end, {Map1, List1}, [connection_type, max_connections, num_acceptors, shutdown, socket]),
+	if
+		Map =:= #{} ->
+			ok;
+		true ->
+			%% @todo This needs a test.
+			error_logger:warning_msg(
+				"Setting Ranch options together with socket options "
+				"is deprecated. Please use the new map syntax that allows "
+				"specifying socket options separately from other options.~n")
+	end,
+	case List of
+		[] -> Map;
+		_ -> Map#{socket_opts => List}
+	end;
+normalize_opts(Any) ->
+	#{socket_opts => Any}.
+
+take(Key, List) ->
+	take(Key, List, []).
+
+take(_, [], _) ->
+	false;
+take(Key, [{Key, Value}|Tail], Acc) ->
+	{value, Value, lists:reverse(Acc, Tail)};
+take(Key, [Value|Tail], Acc) ->
+	take(Key, Tail, [Value|Acc]).
+
 maybe_started({error, {{shutdown,
 		{failed_to_start_child, ranch_acceptors_sup,
 			{listen_error, _, Reason}}}, _}} = Error) ->
@@ -151,25 +210,26 @@ maybe_resumed({ok, _, _}) ->
 maybe_resumed(Res) ->
 	Res.
 
--spec child_spec(ref(), module(), any(), module(), any())
+-spec child_spec(ref(), module(), opts(), module(), any())
 	-> supervisor:child_spec().
-child_spec(Ref, Transport, TransOpts, Protocol, ProtoOpts) ->
-	NumAcceptors = proplists:get_value(num_acceptors, TransOpts, 10),
-	child_spec(Ref, NumAcceptors, Transport, TransOpts, Protocol, ProtoOpts).
-
--spec child_spec(ref(), non_neg_integer(), module(), any(), module(), any())
-	-> supervisor:child_spec().
-child_spec(Ref, NumAcceptors, Transport, TransOpts, Protocol, ProtoOpts)
-		when is_integer(NumAcceptors) andalso is_atom(Transport)
-		andalso is_atom(Protocol) ->
+child_spec(Ref, Transport, TransOpts0, Protocol, ProtoOpts) ->
+	TransOpts = normalize_opts(TransOpts0),
 	{{ranch_listener_sup, Ref}, {ranch_listener_sup, start_link, [
-		Ref, NumAcceptors, Transport, TransOpts, Protocol, ProtoOpts
+		Ref, Transport, TransOpts, Protocol, ProtoOpts
 	]}, permanent, infinity, supervisor, [ranch_listener_sup]}.
 
+-spec child_spec(ref(), non_neg_integer(), module(), opts(), module(), any())
+	-> supervisor:child_spec().
+child_spec(Ref, NumAcceptors, Transport, TransOpts0, Protocol, ProtoOpts)
+		when is_integer(NumAcceptors), is_atom(Transport), is_atom(Protocol) ->
+	TransOpts = normalize_opts(TransOpts0),
+	child_spec(Ref, Transport, TransOpts#{num_acceptors => NumAcceptors},
+		Protocol, ProtoOpts).
+
 -spec accept_ack(ref()) -> ok.
 accept_ack(Ref) ->
-	receive {handshake, Ref, Transport, Socket, AckTimeout} ->
-		Transport:accept_ack(Socket, AckTimeout)
+	receive {handshake, Ref, Transport, Socket, HandshakeTimeout} ->
+		Transport:accept_ack(Socket, HandshakeTimeout)
 	end.
 
 -spec handshake(ref()) -> {ok, ranch_transport:socket()}.
@@ -178,8 +238,8 @@ handshake(Ref) ->
 
 -spec handshake(ref(), any()) -> {ok, ranch_transport:socket()}.
 handshake(Ref, Opts) ->
-	receive {handshake, Ref, Transport, Socket, AckTimeout} ->
-		Transport:handshake(Socket, Opts, AckTimeout)
+	receive {handshake, Ref, Transport, Socket, HandshakeTimeout} ->
+		Transport:handshake(Socket, Opts, HandshakeTimeout)
 	end.
 
 -spec remove_connection(ref()) -> ok.
@@ -220,8 +280,9 @@ set_max_connections(Ref, MaxConnections) ->
 get_transport_options(Ref) ->
 	ranch_server:get_transport_options(Ref).
 
--spec set_transport_options(ref(), any()) -> ok | {error, running}.
-set_transport_options(Ref, TransOpts) ->
+-spec set_transport_options(ref(), opts()) -> ok | {error, running}.
+set_transport_options(Ref, TransOpts0) ->
+	TransOpts = normalize_opts(TransOpts0),
 	case get_status(Ref) of
 		suspended ->
 			ok = ranch_server:set_transport_options(Ref, TransOpts);
@@ -229,7 +290,7 @@ set_transport_options(Ref, TransOpts) ->
 			{error, running}
 	end.
 
--spec get_protocol_options(ref()) -> any().
+-spec get_protocol_options(ref()) -> opts().
 get_protocol_options(Ref) ->
 	ranch_server:get_protocol_options(Ref).
 
@@ -248,7 +309,7 @@ info(Ref) ->
 	listener_info(Ref, Pid).
 
 listener_info(Ref, Pid) ->
-	[_, NumAcceptors, Transport, _, Protocol, _] = ranch_server:get_listener_start_args(Ref),
+	[_, Transport, _, Protocol, _] = ranch_server:get_listener_start_args(Ref),
 	ConnsSup = ranch_server:get_connections_sup(Ref),
 	Status = get_status(Ref),
 	{IP, Port} = get_addr(Ref),
@@ -260,7 +321,6 @@ listener_info(Ref, Pid) ->
 		{status, Status},
 		{ip, IP},
 		{port, Port},
-		{num_acceptors, NumAcceptors},
 		{max_connections, MaxConns},
 		{active_connections, ranch_conns_sup:active_connections(ConnsSup)},
 		{all_connections, proplists:get_value(active, supervisor:count_children(ConnsSup))},

src/ranch_acceptors_sup.erl

@@ -15,28 +15,24 @@
 -module(ranch_acceptors_sup).
 -behaviour(supervisor).
 
--export([start_link/3]).
+-export([start_link/2]).
 -export([init/1]).
 
--spec start_link(ranch:ref(), non_neg_integer(), module())
+-spec start_link(ranch:ref(), module())
 	-> {ok, pid()}.
-start_link(Ref, NumAcceptors, Transport) ->
-	supervisor:start_link(?MODULE, [Ref, NumAcceptors, Transport]).
+start_link(Ref, Transport) ->
+	supervisor:start_link(?MODULE, [Ref, Transport]).
 
-init([Ref, NumAcceptors, Transport]) ->
+init([Ref, Transport]) ->
 	ConnsSup = ranch_server:get_connections_sup(Ref),
 	TransOpts = ranch_server:get_transport_options(Ref),
-	LSocket = case proplists:get_value(socket, TransOpts) of
+	NumAcceptors = maps:get(num_acceptors, TransOpts, 10),
+	LSocket = case maps:get(socket, TransOpts, undefined) of
 		undefined ->
-			TransOpts2 = proplists:delete(ack_timeout,
-				proplists:delete(connection_type,
-				proplists:delete(max_connections,
-				proplists:delete(num_acceptors,
-				proplists:delete(shutdown,
-				proplists:delete(socket, TransOpts)))))),
-			case Transport:listen(TransOpts2) of
+			SocketOpts = maps:get(socket_opts, TransOpts, []),
+			case Transport:listen(SocketOpts) of
 				{ok, Socket} -> Socket;
-				{error, Reason} -> listen_error(Ref, Transport, TransOpts2, Reason)
+				{error, Reason} -> listen_error(Ref, Transport, SocketOpts, Reason)
 			end;
 		Socket ->
 			Socket

src/ranch_conns_sup.erl

@@ -39,7 +39,7 @@
 	transport = undefined :: module(),
 	protocol = undefined :: module(),
 	opts :: any(),
-	ack_timeout :: timeout(),
+	handshake_timeout :: timeout(),
 	max_conns = undefined :: ranch:max_conns()
 }).
 
@@ -99,14 +99,14 @@ init(Parent, Ref, Transport, Protocol) ->
 	ok = ranch_server:set_connections_sup(Ref, self()),
 	MaxConns = ranch_server:get_max_connections(Ref),
 	TransOpts = ranch_server:get_transport_options(Ref),
-	ConnType = proplists:get_value(connection_type, TransOpts, worker),
-	Shutdown = proplists:get_value(shutdown, TransOpts, 5000),
-	AckTimeout = proplists:get_value(ack_timeout, TransOpts, 5000),
+	ConnType = maps:get(connection_type, TransOpts, worker),
+	Shutdown = maps:get(shutdown, TransOpts, 5000),
+	HandshakeTimeout = maps:get(handshake_timeout, TransOpts, 5000),
 	ProtoOpts = ranch_server:get_protocol_options(Ref),
 	ok = proc_lib:init_ack(Parent, {ok, self()}),
 	loop(#state{parent=Parent, ref=Ref, conn_type=ConnType,
 		shutdown=Shutdown, transport=Transport, protocol=Protocol,
-		opts=ProtoOpts, ack_timeout=AckTimeout, max_conns=MaxConns}, 0, 0, []).
+		opts=ProtoOpts, handshake_timeout=HandshakeTimeout, max_conns=MaxConns}, 0, 0, []).
 
 loop(State=#state{parent=Parent, ref=Ref, conn_type=ConnType,
 		transport=Transport, protocol=Protocol, opts=Opts,
@@ -219,11 +219,11 @@ loop(State=#state{parent=Parent, ref=Ref, conn_type=ConnType,
 			loop(State, CurConns, NbChildren, Sleepers)
 	end.
 
-handshake(State=#state{ref=Ref, transport=Transport, ack_timeout=AckTimeout, max_conns=MaxConns},
-		CurConns, NbChildren, Sleepers, To, Socket, SupPid, ProtocolPid) ->
+handshake(State=#state{ref=Ref, transport=Transport, handshake_timeout=HandshakeTimeout,
+		max_conns=MaxConns}, CurConns, NbChildren, Sleepers, To, Socket, SupPid, ProtocolPid) ->
 	case Transport:controlling_process(Socket, ProtocolPid) of
 		ok ->
-			ProtocolPid ! {handshake, Ref, Transport, Socket, AckTimeout},
+			ProtocolPid ! {handshake, Ref, Transport, Socket, HandshakeTimeout},
 			put(SupPid, active),
 			CurConns2 = CurConns + 1,
 			if CurConns2 < MaxConns ->

src/ranch_listener_sup.erl

@@ -15,27 +15,27 @@
 -module(ranch_listener_sup).
 -behaviour(supervisor).
 
--export([start_link/6]).
+-export([start_link/5]).
 -export([init/1]).
 
--spec start_link(ranch:ref(), non_neg_integer(), module(), any(), module(), any())
+-spec start_link(ranch:ref(), module(), any(), module(), any())
 	-> {ok, pid()}.
-start_link(Ref, NumAcceptors, Transport, TransOpts, Protocol, ProtoOpts) ->
-	MaxConns = proplists:get_value(max_connections, TransOpts, 1024),
+start_link(Ref, Transport, TransOpts, Protocol, ProtoOpts) ->
+	MaxConns = maps:get(max_connections, TransOpts, 1024),
 	ranch_server:set_new_listener_opts(Ref, MaxConns, TransOpts, ProtoOpts,
-		[Ref, NumAcceptors, Transport, TransOpts, Protocol, ProtoOpts]),
+		[Ref, Transport, TransOpts, Protocol, ProtoOpts]),
 	supervisor:start_link(?MODULE, {
-		Ref, NumAcceptors, Transport, Protocol
+		Ref, Transport, Protocol
 	}).
 
-init({Ref, NumAcceptors, Transport, Protocol}) ->
+init({Ref, Transport, Protocol}) ->
 	ok = ranch_server:set_listener_sup(Ref, self()),
 	ChildSpecs = [
 		{ranch_conns_sup, {ranch_conns_sup, start_link,
 				[Ref, Transport, Protocol]},
 			permanent, infinity, supervisor, [ranch_conns_sup]},
 		{ranch_acceptors_sup, {ranch_acceptors_sup, start_link,
-				[Ref, NumAcceptors, Transport]},
+				[Ref, Transport]},
 			permanent, infinity, supervisor, [ranch_acceptors_sup]}
 	],
 	{ok, {{rest_for_one, 1, 5}, ChildSpecs}}.

test/acceptor_SUITE.erl

@@ -83,30 +83,34 @@ groups() ->
 misc_bad_transport(_) ->
 	doc("Reject invalid transport modules."),
 	{error, badarg} = ranch:start_listener(misc_bad_transport,
-		bad_transport, [], echo_protocol, []),
+		bad_transport, #{},
+		echo_protocol, []),
 	ok.
 
 misc_bad_transport_options(_) ->
 	doc("Ignore invalid transport options."),
-	{ok, _} = ranch:start_listener(misc_bad_transport,
-		ranch_tcp, [binary, {packet, 4}, <<"garbage">>, raw, backlog], echo_protocol, []),
+	{ok, _} = ranch:start_listener(misc_bad_transport_options,
+		ranch_tcp, [binary, {packet, 4}, <<"garbage">>, raw, backlog],
+		echo_protocol, []),
 	ok.
 
 misc_info(_) ->
 	doc("Information about listeners."),
 	%% Open a listener with a few connections.
 	{ok, Pid1} = ranch:start_listener({misc_info, tcp},
-		ranch_tcp, [{num_acceptors, 1}],
+		ranch_tcp, #{num_acceptors => 1},
 		remove_conn_and_wait_protocol, [{remove, true, 2500}]),
 	Port1 = ranch:get_port({misc_info, tcp}),
 	%% Open a few more listeners with different arguments.
 	{ok, Pid2} = ranch:start_listener({misc_info, act},
-		ranch_tcp, [{num_acceptors, 2}], active_echo_protocol, {}),
+		ranch_tcp, #{num_acceptors => 2},
+		active_echo_protocol, {}),
 	Port2 = ranch:get_port({misc_info, act}),
 	ranch:set_max_connections({misc_info, act}, infinity),
 	Opts = ct_helper:get_certs_from_ets(),
 	{ok, Pid3} = ranch:start_listener({misc_info, ssl},
-		ranch_ssl, [{num_acceptors, 3}|Opts], echo_protocol, [{}]),
+		ranch_ssl, #{num_acceptors => 3, socket_opts => Opts},
+		echo_protocol, [{}]),
 	Port3 = ranch:get_port({misc_info, ssl}),
 	%% Open 5 connections, 3 removed from the count.
 	{ok, _} = gen_tcp:connect("localhost", Port1, [binary, {active, false}, {packet, raw}]),
@@ -125,12 +129,11 @@ misc_info(_) ->
 			{status, _},
 			{ip, _},
 			{port, Port2},
-			{num_acceptors, 2},
 			{max_connections, infinity}, %% Option was modified.
 			{active_connections, 0},
 			{all_connections, 0},
 			{transport, ranch_tcp},
-			{transport_options, [{num_acceptors, 2}]},
+			{transport_options, #{num_acceptors := 2}},
 			{protocol, active_echo_protocol},
 			{protocol_options, {}}
 		]},
@@ -139,12 +142,11 @@ misc_info(_) ->
 			{status, _},
 			{ip, _},
 			{port, Port3},
-			{num_acceptors, 3},
 			{max_connections, 1024},
 			{active_connections, 0},
 			{all_connections, 0},
 			{transport, ranch_ssl},
-			{transport_options, [{num_acceptors, 3}|Opts]},
+			{transport_options, #{num_acceptors := 3, socket_opts := Opts}},
 			{protocol, echo_protocol},
 			{protocol_options, [{}]}
 		]},
@@ -153,12 +155,11 @@ misc_info(_) ->
 			{status, _},
 			{ip, _},
 			{port, Port1},
-			{num_acceptors, 1},
 			{max_connections, 1024},
 			{active_connections, 2},
 			{all_connections, 5},
 			{transport, ranch_tcp},
-			{transport_options, [{num_acceptors, 1}]},
+			{transport_options, #{num_acceptors := 1}},
 			{protocol, remove_conn_and_wait_protocol},
 			{protocol_options, [{remove, false, 2500}]} %% Option was modified.
 		]}
@@ -177,15 +178,20 @@ misc_info_embedded(_) ->
 	doc("Information about listeners in embedded mode."),
 	{ok, SupPid} = embedded_sup:start_link(),
 	%% Open a listener with a few connections.
-	{ok, Pid1} = embedded_sup:start_listener(SupPid, {misc_info_embedded, tcp}, ranch_tcp, [{num_acceptors, 1}], remove_conn_and_wait_protocol, [{remove, true, 2500}]),
+	{ok, Pid1} = embedded_sup:start_listener(SupPid, {misc_info_embedded, tcp},
+		ranch_tcp, #{num_acceptors => 1},
+		remove_conn_and_wait_protocol, [{remove, true, 2500}]),
 	Port1 = ranch:get_port({misc_info_embedded, tcp}),
 	%% Open a few more listeners with different arguments.
-	{ok, Pid2} = embedded_sup:start_listener(SupPid, {misc_info_embedded, act}, ranch_tcp, [{num_acceptors, 2}], active_echo_protocol, {}),
+	{ok, Pid2} = embedded_sup:start_listener(SupPid, {misc_info_embedded, act},
+		ranch_tcp, #{num_acceptors => 2},
+		active_echo_protocol, {}),
 	Port2 = ranch:get_port({misc_info_embedded, act}),
 	ranch:set_max_connections({misc_info_embedded, act}, infinity),
 	Opts = ct_helper:get_certs_from_ets(),
 	{ok, Pid3} = embedded_sup:start_listener(SupPid, {misc_info_embedded, ssl},
-		ranch_ssl, [{num_acceptors, 3}|Opts], echo_protocol, [{}]),
+		ranch_ssl, #{num_acceptors => 3, socket_opts => Opts},
+		echo_protocol, [{}]),
 	Port3 = ranch:get_port({misc_info_embedded, ssl}),
 	%% Open 5 connections, 3 removed from the count.
 	{ok, _} = gen_tcp:connect("localhost", Port1, [binary, {active, false}, {packet, raw}]),
@@ -204,12 +210,11 @@ misc_info_embedded(_) ->
 			{status, _},
 			{ip, _},
 			{port, Port2},
-			{num_acceptors, 2},
 			{max_connections, infinity}, %% Option was modified.
 			{active_connections, 0},
 			{all_connections, 0},
 			{transport, ranch_tcp},
-			{transport_options, [{num_acceptors, 2}]},
+			{transport_options, #{num_acceptors := 2}},
 			{protocol, active_echo_protocol},
 			{protocol_options, {}}
 		]},
@@ -218,12 +223,11 @@ misc_info_embedded(_) ->
 			{status, _},
 			{ip, _},
 			{port, Port3},
-			{num_acceptors, 3},
 			{max_connections, 1024},
 			{active_connections, 0},
 			{all_connections, 0},
 			{transport, ranch_ssl},
-			{transport_options, [{num_acceptors, 3}|Opts]},
+			{transport_options, #{num_acceptors := 3, socket_opts := Opts}},
 			{protocol, echo_protocol},
 			{protocol_options, [{}]}
 		]},
@@ -232,12 +236,11 @@ misc_info_embedded(_) ->
 			{status, _},
 			{ip, _},
 			{port, Port1},
-			{num_acceptors, 1},
 			{max_connections, 1024},
 			{active_connections, 2},
 			{all_connections, 5},
 			{transport, ranch_tcp},
-			{transport_options, [{num_acceptors, 1}]},
+			{transport_options, #{num_acceptors := 1}},
 			{protocol, remove_conn_and_wait_protocol},
 			{protocol_options, [{remove, false, 2500}]} %% Option was modified.
 		]}
@@ -288,7 +291,7 @@ misc_wait_for_connections(_) ->
 	Pid2GE = do_create_waiter(Self, Name, '>=', 2),
 	Pid2EQ = do_create_waiter(Self, Name, '==', 2),
 	{ok, _} = ranch:start_listener(Name,
-		ranch_tcp, [{num_acceptors, 1}],
+		ranch_tcp, #{num_acceptors => 1},
 		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	%% Create some connections, ensure that waiters respond.
@@ -351,7 +354,8 @@ ssl_accept_error(_) ->
 	Name = name(),
 	Opts = ct_helper:get_certs_from_ets(),
 	{ok, ListenerSup} = ranch:start_listener(Name,
-		ranch_ssl, [{num_acceptors, 1}|Opts], echo_protocol, []),
+		ranch_ssl, #{num_acceptors => 1, socket_opts => Opts},
+		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	ListenerSupChildren = supervisor:which_children(ListenerSup),
 	{_, AcceptorsSup, _, _} = lists:keyfind(ranch_acceptors_sup, 1, ListenerSupChildren),
@@ -368,7 +372,9 @@ ssl_accept_socket(_) ->
 	Name = name(),
 	Opts = ct_helper:get_certs_from_ets(),
 	{ok, S} = ssl:listen(0, [binary, {active, false}, {packet, raw}, {reuseaddr, true}|Opts]),
-	{ok, _} = ranch:start_listener(Name, ranch_ssl, [{socket, S}], echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_ssl, #{socket => S},
+		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = ssl:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok = ssl:send(Socket, <<"TCP Ranch is working!">>),
@@ -383,7 +389,9 @@ ssl_active_echo(_) ->
 	doc("Ensure that active mode works with SSL transport."),
 	Name = name(),
 	Opts = ct_helper:get_certs_from_ets(),
-	{ok, _} = ranch:start_listener(Name, ranch_ssl, Opts, active_echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_ssl, Opts,
+		active_echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = ssl:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok = ssl:send(Socket, <<"SSL Ranch is working!">>),
@@ -398,7 +406,9 @@ ssl_echo(_) ->
 	doc("Ensure that passive mode works with SSL transport."),
 	Name = name(),
 	Opts = ct_helper:get_certs_from_ets(),
-	{ok, _} = ranch:start_listener(Name, ranch_ssl, Opts, echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_ssl, Opts,
+		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = ssl:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok = ssl:send(Socket, <<"SSL Ranch is working!">>),
@@ -421,7 +431,9 @@ do_ssl_sni_echo() ->
 	doc("Ensure that SNI works with SSL transport."),
 	Name = name(),
 	Opts = ct_helper:get_certs_from_ets(),
-	{ok, _} = ranch:start_listener(Name, ranch_ssl, [{sni_hosts, [{"localhost", Opts}]}], echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_ssl, [{sni_hosts, [{"localhost", Opts}]}],
+		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = ssl:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok = ssl:send(Socket, <<"SSL Ranch is working!">>),
@@ -444,7 +456,9 @@ do_ssl_sni_fail() ->
 	doc("Ensure that connection fails when host is not in SNI list."),
 	Name = name(),
 	Opts = ct_helper:get_certs_from_ets(),
-	{ok, _} = ranch:start_listener(Name, ranch_ssl, [{sni_hosts, [{"pouet", Opts}]}], echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_ssl, [{sni_hosts, [{"pouet", Opts}]}],
+		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{error, _} = ssl:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok = ranch:stop_listener(Name),
@@ -456,7 +470,9 @@ ssl_graceful(_) ->
 	doc("Ensure suspending and resuming of listeners does not kill active connections."),
 	Name = name(),
 	Opts = ct_helper:get_certs_from_ets(),
-	{ok, _} = ranch:start_listener(Name, ranch_ssl, Opts, echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_ssl, Opts,
+		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	%% Make sure connections with a fresh listener work.
 	running = ranch:get_status(Name),
@@ -465,7 +481,7 @@ ssl_graceful(_) ->
 	ok = ssl:send(Socket1, <<"SSL with fresh listener">>),
 	{ok, <<"SSL with fresh listener">>} = ssl:recv(Socket1, 23, 1000),
 	%% Make sure transport options cannot be changed on a running listener.
-	{error, running} = ranch:set_transport_options(Name, [{port, Port}|Opts]),
+	{error, running} = ranch:set_transport_options(Name, #{socket_opts => [{port, Port}|Opts]}),
 	%% Suspend listener, make sure established connections keep running.
 	ok = ranch:suspend_listener(Name),
 	suspended = ranch:get_status(Name),
@@ -475,7 +491,7 @@ ssl_graceful(_) ->
 	{error, econnrefused} = ssl:connect("localhost", Port,
 		[binary, {active, false}, {packet, raw}]),
 	%% Make sure transport options can be changed when listener is suspended.
-	ok = ranch:set_transport_options(Name, [{port, Port}|Opts]),
+	ok = ranch:set_transport_options(Name, #{socket_opts => [{port, Port}|Opts]}),
 	%% Resume listener, make sure connections can be established again.
 	ok = ranch:resume_listener(Name),
 	running = ranch:get_status(Name),
@@ -484,7 +500,7 @@ ssl_graceful(_) ->
 	ok = ssl:send(Socket2, <<"SSL with resumed listener">>),
 	{ok, <<"SSL with resumed listener">>} = ssl:recv(Socket2, 25, 1000),
 	%% Make sure transport options cannot be changed on resumed listener.
-	{error, running} = ranch:set_transport_options(Name, [{port, Port}|Opts]),
+	{error, running} = ranch:set_transport_options(Name, #{socket_opts => [{port, Port}|Opts]}),
 	ok = ranch:stop_listener(Name),
 	{error, closed} = ssl:recv(Socket1, 0, 1000),
 	{error, closed} = ssl:recv(Socket2, 0, 1000),
@@ -495,7 +511,9 @@ ssl_accept_ack(_) ->
 	doc("Ensure accept_ack works with SSL transport."),
 	Name = name(),
 	Opts = ct_helper:get_certs_from_ets(),
-	{ok, _} = ranch:start_listener(Name, ranch_ssl, Opts, accept_ack_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_ssl, Opts,
+		accept_ack_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = ssl:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok = ssl:send(Socket, <<"SSL transport accept_ack is working!">>),
@@ -509,7 +527,9 @@ ssl_getopts_capability(_) ->
 	doc("Ensure getopts/2 capability."),
 	Name=name(),
 	Opts=ct_helper:get_certs_from_ets(),
-	{ok, _}=ranch:start_listener(Name, ranch_ssl, Opts, transport_capabilities_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_ssl, Opts,
+		transport_capabilities_protocol, []),
 	Port=ranch:get_port(Name),
 	{ok, Socket}=ssl:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok=ssl:send(Socket, <<"getopts/2">>),
@@ -531,7 +551,9 @@ do_ssl_getstat_capability() ->
 	doc("Ensure getstat/{1,2} capability."),
 	Name=name(),
 	Opts=ct_helper:get_certs_from_ets(),
-	{ok, _}=ranch:start_listener(Name, ranch_ssl, Opts, transport_capabilities_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_ssl, Opts,
+		transport_capabilities_protocol, []),
 	Port=ranch:get_port(Name),
 	{ok, Socket}=ssl:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok=ssl:send(Socket, <<"getstat/1">>),
@@ -547,10 +569,13 @@ ssl_error_eaddrinuse(_) ->
 	doc("Ensure that failure due to an eaddrinuse returns a compact readable error."),
 	Name = name(),
 	Opts = ct_helper:get_certs_from_ets(),
-	{ok, _} = ranch:start_listener(Name, ranch_ssl, Opts, active_echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_ssl, Opts,
+		active_echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{error, eaddrinuse} = ranch:start_listener({Name, fails},
-		ranch_ssl, [{port, Port}|Opts], active_echo_protocol, []),
+		ranch_ssl, [{port, Port}|Opts],
+		active_echo_protocol, []),
 	ok = ranch:stop_listener(Name),
 	%% Make sure the listener stopped.
 	{'EXIT', _} = begin catch ranch:get_port(Name) end,
@@ -558,7 +583,9 @@ ssl_error_eaddrinuse(_) ->
 
 ssl_error_no_cert(_) ->
 	doc("Ensure that failure due to missing certificate returns a compact readable error."),
-	{error, no_cert} = ranch:start_listener(name(), ranch_ssl, [], active_echo_protocol, []),
+	{error, no_cert} = ranch:start_listener(name(),
+		ranch_ssl, #{},
+		active_echo_protocol, []),
 	ok.
 
 ssl_error_eacces(_) ->
@@ -570,7 +597,8 @@ ssl_error_eacces(_) ->
 			Name = name(),
 			Opts = ct_helper:get_certs_from_ets(),
 			{error, eacces} = ranch:start_listener(Name,
-				ranch_ssl, [{port, 283}|Opts], active_echo_protocol, []),
+				ranch_ssl, [{port, 283}|Opts],
+				active_echo_protocol, []),
 			ok
 	end.
 
@@ -580,7 +608,9 @@ tcp_accept_socket(_) ->
 	doc("Ensure that listener can use an externally opened TCP listen socket."),
 	Name = name(),
 	{ok, S} = gen_tcp:listen(0, [binary, {active, false}, {packet, raw}, {reuseaddr, true}]),
-	{ok, _} = ranch:start_listener(Name, ranch_tcp, [{socket, S}], echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_tcp, #{socket => S},
+		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = gen_tcp:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok = gen_tcp:send(Socket, <<"TCP Ranch is working!">>),
@@ -594,7 +624,9 @@ tcp_accept_socket(_) ->
 tcp_active_echo(_) ->
 	doc("Ensure that active mode works with TCP transport."),
 	Name = name(),
-	{ok, _} = ranch:start_listener(Name, ranch_tcp, [], active_echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_tcp, #{},
+		active_echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = gen_tcp:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok = gen_tcp:send(Socket, <<"TCP Ranch is working!">>),
@@ -608,7 +640,9 @@ tcp_active_echo(_) ->
 tcp_echo(_) ->
 	doc("Ensure that passive mode works with TCP transport."),
 	Name = name(),
-	{ok, _} = ranch:start_listener(Name, ranch_tcp, [], echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_tcp, #{},
+		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = gen_tcp:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok = gen_tcp:send(Socket, <<"TCP Ranch is working!">>),
@@ -622,7 +656,9 @@ tcp_echo(_) ->
 tcp_graceful(_) ->
 	doc("Ensure suspending and resuming of listeners does not kill active connections."),
 	Name = name(),
-	{ok, _} = ranch:start_listener(Name, ranch_tcp, [], echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_tcp, #{},
+		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	%% Make sure connections with a fresh listener work.
 	running = ranch:get_status(Name),
@@ -660,7 +696,9 @@ tcp_graceful(_) ->
 tcp_accept_ack(_) ->
 	doc("Ensure accept_ack works with TCP transport."),
 	Name = name(),
-	{ok, _} = ranch:start_listener(Name, ranch_tcp, [], accept_ack_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_tcp, #{},
+		accept_ack_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = gen_tcp:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok = gen_tcp:send(Socket, <<"TCP transport accept_ack is working!">>),
@@ -674,7 +712,9 @@ tcp_inherit_options(_) ->
 	doc("Ensure TCP options are inherited in the protocol."),
 	Name = name(),
 	Opts = [{nodelay, false}, {send_timeout_close, false}],
-	{ok, _} = ranch:start_listener(Name, ranch_tcp, Opts, check_tcp_options, [{pid, self()} | Opts]),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_tcp, Opts,
+		check_tcp_options, [{pid, self()} | Opts]),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = gen_tcp:connect("localhost", Port, [binary, {active, true}, {packet, raw}]),
 	receive checked -> ok after 1000 -> error(timeout) end,
@@ -685,7 +725,7 @@ tcp_max_connections(_) ->
 	doc("Ensure the max_connections option actually limits connections."),
 	Name = name(),
 	{ok, _} = ranch:start_listener(Name,
-		ranch_tcp, [{max_connections, 10}, {num_acceptors, 1}],
+		ranch_tcp, #{max_connections => 10, num_acceptors => 1},
 		notify_and_wait_protocol, [{msg, connected}, {pid, self()}]),
 	Port = ranch:get_port(Name),
 	ok = connect_loop(Port, 11, 150),
@@ -698,7 +738,7 @@ tcp_max_connections_and_beyond(_) ->
 	doc("Ensure the max_connections option works when connections are removed from the count."),
 	Name = name(),
 	{ok, _} = ranch:start_listener(Name,
-		ranch_tcp, [{max_connections, 10}, {num_acceptors, 1}],
+		ranch_tcp, #{max_connections => 10, num_acceptors => 1},
 		remove_conn_and_wait_protocol, [{remove, true, 2500}]),
 	Port = ranch:get_port(Name),
 	ok = connect_loop(Port, 10, 0),
@@ -725,7 +765,7 @@ tcp_max_connections_infinity(_) ->
 	doc("Set the max_connections option from 10 to infinity and back to 10."),
 	Name = name(),
 	{ok, _} = ranch:start_listener(Name,
-		ranch_tcp, [{max_connections, 10}, {num_acceptors, 1}],
+		ranch_tcp, #{max_connections => 10, num_acceptors => 1},
 		notify_and_wait_protocol, [{msg, connected}, {pid, self()}]),
 	Port = ranch:get_port(Name),
 	ok = connect_loop(Port, 20, 0),
@@ -746,7 +786,7 @@ tcp_remove_connections(_) ->
 	doc("Ensure that removed connections are only removed once."),
 	Name = name(),
 	{ok, _} = ranch:start_listener(Name,
-		ranch_tcp, [],
+		ranch_tcp, #{},
 		remove_conn_and_wait_protocol, [{remove, true, 0}]),
 	Port = ranch:get_port(Name),
 	ok = connect_loop(Port, 10, 0),
@@ -758,7 +798,7 @@ tcp_set_max_connections(_) ->
 	doc("Ensure that changing the max_connections option to a larger value allows for more connections."),
 	Name = name(),
 	{ok, _} = ranch:start_listener(Name,
-		ranch_tcp, [{max_connections, 10}, {num_acceptors, 1}],
+		ranch_tcp, #{max_connections => 10, num_acceptors => 1},
 		notify_and_wait_protocol, [{msg, connected}, {pid, self()}]),
 	Port = ranch:get_port(Name),
 	ok = connect_loop(Port, 20, 0),
@@ -779,9 +819,9 @@ tcp_set_max_connections_clean(Config) ->
 do_tcp_set_max_connections_clean(_) ->
 	doc("Ensure that setting max_connections does not crash any process."),
 	Name = name(),
-	{ok, ListSupPid} = ranch:start_listener(Name, ranch_tcp,
-			[{max_connections, 4}],
-			notify_and_wait_protocol, [{msg, connected}, {pid, self()}]),
+	{ok, ListSupPid} = ranch:start_listener(Name,
+		ranch_tcp, #{max_connections => 4},
+		notify_and_wait_protocol, [{msg, connected}, {pid, self()}]),
 	Children = supervisor:which_children(ListSupPid),
 	{_, AccSupPid, _, _} = lists:keyfind(ranch_acceptors_sup, 1, Children),
 	1 = erlang:trace(ListSupPid, true, [procs]),
@@ -805,7 +845,9 @@ do_tcp_set_max_connections_clean(_) ->
 tcp_getopts_capability(_) ->
 	doc("Ensure getopts/2 capability."),
 	Name=name(),
-	{ok, _}=ranch:start_listener(Name, ranch_tcp, [], transport_capabilities_protocol, []),
+	{ok, _}=ranch:start_listener(Name,
+		ranch_tcp, #{},
+		transport_capabilities_protocol, []),
 	Port=ranch:get_port(Name),
 	{ok, Socket}=gen_tcp:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok=gen_tcp:send(Socket, <<"getopts/2">>),
@@ -818,7 +860,9 @@ tcp_getopts_capability(_) ->
 tcp_getstat_capability(_) ->
 	doc("Ensure getstat/{1,2} capability."),
 	Name=name(),
-	{ok, _}=ranch:start_listener(Name, ranch_tcp, [], transport_capabilities_protocol, []),
+	{ok, _}=ranch:start_listener(Name,
+		ranch_tcp, #{},
+		transport_capabilities_protocol, []),
 	Port=ranch:get_port(Name),
 	{ok, Socket}=gen_tcp:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok=gen_tcp:send(Socket, <<"getstat/1">>),
@@ -834,7 +878,7 @@ tcp_upgrade(_) ->
 	doc("Ensure that protocol options can be updated."),
 	Name = name(),
 	{ok, _} = ranch:start_listener(Name,
-		ranch_tcp, [],
+		ranch_tcp, #{},
 		notify_and_wait_protocol, [{msg, connected}, {pid, self()}]),
 	Port = ranch:get_port(Name),
 	ok = connect_loop(Port, 1, 0),
@@ -847,10 +891,13 @@ tcp_upgrade(_) ->
 tcp_error_eaddrinuse(_) ->
 	doc("Ensure that failure due to an eaddrinuse returns a compact readable error."),
 	Name = name(),
-	{ok, _} = ranch:start_listener(Name, ranch_tcp, [], active_echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_tcp, #{},
+		active_echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{error, eaddrinuse} = ranch:start_listener({Name, fails},
-		ranch_tcp, [{port, Port}], active_echo_protocol, []),
+		ranch_tcp, [{port, Port}],
+		active_echo_protocol, []),
 	ok = ranch:stop_listener(Name),
 	%% Make sure the listener stopped.
 	{'EXIT', _} = begin catch ranch:get_port(Name) end,
@@ -864,7 +911,8 @@ tcp_error_eacces(_) ->
 			doc("Ensure that failure due to an eacces returns a compact readable error."),
 			Name = name(),
 			{error, eacces} = ranch:start_listener(Name,
-				ranch_tcp, [{port, 283}], active_echo_protocol, []),
+				ranch_tcp, [{port, 283}],
+				active_echo_protocol, []),
 			ok
 	end.
 
@@ -874,7 +922,7 @@ connection_type_supervisor(_) ->
 	doc("The supervisor connection type must be reflected in the specifications."),
 	Name = name(),
 	{ok, _} = ranch:start_listener(Name,
-		ranch_tcp, [{connection_type, supervisor}],
+		ranch_tcp, #{connection_type => supervisor},
 		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = gen_tcp:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
@@ -892,7 +940,7 @@ connection_type_supervisor_separate_from_connection(_) ->
 	doc("The supervisor connection type allows separate supervised and connection processes."),
 	Name = name(),
 	{ok, _} = ranch:start_listener(Name,
-		ranch_tcp, [{connection_type, supervisor}],
+		ranch_tcp, #{connection_type => supervisor},
 		supervisor_separate, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = gen_tcp:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
@@ -951,7 +999,8 @@ do_supervisor_clean_child_restart(_) ->
 	1 = erlang:trace_pattern({ranch_tcp, listen, 1},
 		[{'_', [], [{return_trace}]}], [global]),
 	{ok, Pid} = ranch:start_listener(Name,
-		ranch_tcp, [{num_acceptors, 1}], echo_protocol, []),
+		ranch_tcp, #{num_acceptors => 1},
+		echo_protocol, []),
 	%% Trace supervisor spawns.
 	1 = erlang:trace(Pid, true, [procs, set_on_spawn]),
 	ConnsSup = ranch_server:get_connections_sup(Name),
@@ -987,7 +1036,8 @@ supervisor_clean_conns_sup_restart(_) ->
 		"the ranch_server process."),
 	Name = name(),
 	{ok, _} = ranch:start_listener(Name,
-		ranch_tcp, [], echo_protocol, []),
+		ranch_tcp, #{},
+		echo_protocol, []),
 	Server = erlang:whereis(ranch_server),
 	ServerMonRef = erlang:monitor(process, Server),
 	%% Exit because Name already registered and is alive.
@@ -1013,7 +1063,8 @@ do_supervisor_clean_restart(_) ->
 	Name = name(),
 	NumAcc = 4,
 	{ok, Pid} = ranch:start_listener(Name,
-		ranch_tcp, [{num_acceptors, NumAcc}], echo_protocol, []),
+		ranch_tcp, #{num_acceptors => NumAcc},
+		echo_protocol, []),
 	%% Trace supervisor spawns.
 	1 = erlang:trace(Pid, true, [procs, set_on_spawn]),
 	ConnsSup0 = ranch_server:get_connections_sup(Name),
@@ -1053,7 +1104,7 @@ do_supervisor_conns_alive(_) ->
 	1 = erlang:trace_pattern({ranch_tcp, listen, 1},
 		[{'_', [], [{return_trace}]}], [global]),
 	{ok, _} = ranch:start_listener(Name,
-		ranch_tcp, [],
+		ranch_tcp, #{},
 		remove_conn_and_wait_protocol, [{remove, false, 2500}]),
 	%% Get the listener socket
 	LSocket = receive
@@ -1079,7 +1130,9 @@ do_supervisor_conns_alive(_) ->
 supervisor_protocol_start_link_crash(_) ->
 	doc("Ensure a protocol start crash does not kill all connections."),
 	Name = name(),
-	{ok, _} = ranch:start_listener(Name, ranch_tcp, [], crash_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_tcp, #{},
+		crash_protocol, []),
 	ConnsSup = ranch_server:get_connections_sup(Name),
 	Port = ranch:get_port(Name),
 	{ok, _} = gen_tcp:connect("localhost", Port, [binary, {active, true}, {packet, raw}]),
@@ -1100,7 +1153,9 @@ do_supervisor_server_recover_state(_) ->
 	_ = erlang:trace(new, true, [call]),
 	1 = erlang:trace_pattern({ranch_server, init, 1},
 		[{'_', [], [{return_trace}]}], [global]),
-	{ok, _} = ranch:start_listener(Name, ranch_tcp, [], echo_protocol, []),
+	{ok, _} = ranch:start_listener(Name,
+		ranch_tcp, #{},
+		echo_protocol, []),
 	ConnsSup = ranch_server:get_connections_sup(Name),
 	ServerPid = erlang:whereis(ranch_server),
 	{monitors, Monitors} = erlang:process_info(ServerPid, monitors),
@@ -1125,7 +1180,9 @@ supervisor_unexpected_message(_) ->
 	doc("Ensure the connections supervisor stays alive when it receives "
 		"an unexpected message."),
 	Name = name(),
-	{ok, ListenerPid} = ranch:start_listener(Name, ranch_tcp, [], echo_protocol, []),
+	{ok, ListenerPid} = ranch:start_listener(Name,
+		ranch_tcp, #{},
+		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, Socket} = gen_tcp:connect("localhost", Port, [binary, {active, false}, {packet, raw}]),
 	ok = gen_tcp:send(Socket, <<"TCP Ranch is working!">>),

test/shutdown_SUITE.erl

@@ -30,7 +30,7 @@ brutal_kill(_) ->
 	doc("Shutdown Ranch listener with shutdown option set to brutal_kill."),
 	Name = name(),
 	{ok, ListenerSup} = ranch:start_listener(Name,
-		ranch_tcp, [{port, 0}, {shutdown, brutal_kill}],
+		ranch_tcp, #{shutdown => brutal_kill},
 		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, _} = gen_tcp:connect("localhost", Port, []),
@@ -50,7 +50,7 @@ infinity(_) ->
 	doc("Shutdown Ranch listener with shutdown option set to infinity."),
 	Name = name(),
 	{ok, ListenerSup} = ranch:start_listener(Name,
-		ranch_tcp, [{port, 0}, {shutdown, infinity}],
+		ranch_tcp, #{shutdown => infinity},
 		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, _} = gen_tcp:connect("localhost", Port, []),
@@ -72,7 +72,7 @@ infinity_trap_exit(_) ->
 		"until the protocol process terminates."),
 	Name = name(),
 	{ok, ListenerSup} = ranch:start_listener(Name,
-		ranch_tcp, [{port, 0}, {shutdown, infinity}],
+		ranch_tcp, #{shutdown => infinity},
 		trap_exit_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, _} = gen_tcp:connect("localhost", Port, []),
@@ -101,7 +101,7 @@ timeout(_) ->
 	doc("Shutdown Ranch listener with shutdown option set to 500ms."),
 	Name = name(),
 	{ok, ListenerSup} = ranch:start_listener(Name,
-		ranch_tcp, [{port, 0}, {shutdown, 500}],
+		ranch_tcp, #{shutdown => 500},
 		echo_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, _} = gen_tcp:connect("localhost", Port, []),
@@ -123,7 +123,7 @@ timeout_trap_exit(_) ->
 		"after the 500ms timeout."),
 	Name = name(),
 	{ok, ListenerSup} = ranch:start_listener(Name,
-		ranch_tcp, [{port, 0}, {shutdown, 500}],
+		ranch_tcp, #{shutdown => 500},
 		trap_exit_protocol, []),
 	Port = ranch:get_port(Name),
 	{ok, _} = gen_tcp:connect("localhost", Port, []),