1%% This Source Code Form is subject to the terms of the Mozilla Public 2%% License, v. 2.0. If a copy of the MPL was not distributed with this 3%% file, You can obtain one at https://mozilla.org/MPL/2.0/. 4%% 5%% Copyright (c) 2007-2021 VMware, Inc. or its affiliates. All rights reserved. 6%% 7 8-module(tcp_listener_sup). 9 10%% Supervises TCP listeners. There is a separate supervisor for every 11%% protocol. In case of AMQP 0-9-1, it resides under rabbit_sup. Plugins 12%% that provide protocol support (e.g. STOMP) have an instance of this supervisor in their 13%% app supervision tree. 14%% 15%% See also rabbit_networking and tcp_listener. 16 17-behaviour(supervisor). 18 19-export([start_link/11]). 20-export([init/1]). 21 22-type mfargs() :: {atom(), atom(), [any()]}. 23 24-spec start_link 25 (inet:ip_address(), inet:port_number(), module(), [gen_tcp:listen_option()], 26 module(), any(), mfargs(), mfargs(), integer(), integer(), string()) -> 27 rabbit_types:ok_pid_or_error(). 28 29start_link(IPAddress, Port, Transport, SocketOpts, ProtoSup, ProtoOpts, OnStartup, OnShutdown, 30 ConcurrentAcceptorCount, ConcurrentConnsSups, Label) -> 31 supervisor:start_link( 32 ?MODULE, {IPAddress, Port, Transport, SocketOpts, ProtoSup, ProtoOpts, OnStartup, OnShutdown, 33 ConcurrentAcceptorCount, ConcurrentConnsSups, Label}). 34 35init({IPAddress, Port, Transport, SocketOpts, ProtoSup, ProtoOpts, OnStartup, OnShutdown, 36 ConcurrentAcceptorCount, ConcurrentConnsSups, Label}) -> 37 {ok, AckTimeout} = application:get_env(rabbit, ssl_handshake_timeout), 38 MaxConnections = max_conn(rabbit_misc:get_env(rabbit, connection_max, infinity), 39 ConcurrentConnsSups), 40 RanchListenerOpts = #{ 41 num_acceptors => ConcurrentAcceptorCount, 42 max_connections => MaxConnections, 43 handshake_timeout => AckTimeout, 44 connection_type => supervisor, 45 socket_opts => [{ip, IPAddress}, 46 {port, Port} | 47 SocketOpts], 48 num_conns_sups => ConcurrentConnsSups 49 }, 50 Flags = {one_for_all, 10, 10}, 51 OurChildSpecStart = {tcp_listener, start_link, [IPAddress, Port, OnStartup, OnShutdown, Label]}, 52 OurChildSpec = {tcp_listener, OurChildSpecStart, transient, 16#ffffffff, worker, [tcp_listener]}, 53 RanchChildSpec = ranch:child_spec(rabbit_networking:ranch_ref(IPAddress, Port), 54 Transport, RanchListenerOpts, 55 ProtoSup, ProtoOpts), 56 {ok, {Flags, [RanchChildSpec, OurChildSpec]}}. 57 58max_conn(infinity, _) -> 59 infinity; 60max_conn(Max, Sups) -> 61 %% connection_max in Ranch is per connection supervisor 62 Max div Sups. 63