prosody
d5f322dd424b
plugins/mod_net_multiplex.lua

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plugins/mod_net_multiplex.lua @ 13110:d5f322dd424b 0.12

mod_s2s: Add event where resolver for s2sout can be tweaked Could be used to implement custom connection methods (c.f. mod_onions) without needing to duplicate the rest of route_to_new_session(). Adds a feature to enable detection since it can be difficult to detect support for an event otherwise.
author Kim Alvefur <zash@zash.se>
date Thu, 18 Aug 2022 03:26:32 +0200
parent 11024:1c7602c70d1f
child 12977:74b9e05af71e
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 module:set_global();
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2
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3 local array = require "util.array";
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4 local max_buffer_len = module:get_option_number("multiplex_buffer_size", 1024);
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5 local default_mode = module:get_option_number("network_default_read_size", 4096);
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6
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7 local portmanager = require "core.portmanager";
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8
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9 local available_services = {};
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10 local service_by_protocol = {};
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11 local available_protocols = array();
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13 local function add_service(service)
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14 local multiplex_pattern = service.multiplex and service.multiplex.pattern;
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15 local protocol_name = service.multiplex and service.multiplex.protocol;
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16 if protocol_name then
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17 module:log("debug", "Adding multiplex service %q with protocol %q", service.name, protocol_name);
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18 service_by_protocol[protocol_name] = service;
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19 available_protocols:push(protocol_name);
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20 end
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21 if multiplex_pattern then
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22 module:log("debug", "Adding multiplex service %q with pattern %q", service.name, multiplex_pattern);
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23 available_services[service] = multiplex_pattern;
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24 elseif not protocol_name then
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25 module:log("debug", "Service %q is not multiplex-capable", service.name);
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26 end
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27 end
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28 module:hook("service-added", function (event) add_service(event.service); end);
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29 module:hook("service-removed", function (event)
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30 available_services[event.service] = nil;
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31 if event.service.multiplex and event.service.multiplex.protocol then
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32 available_protocols:filter(function (p) return p ~= event.service.multiplex.protocol end);
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33 service_by_protocol[event.service.multiplex.protocol] = nil;
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34 end
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35 end);
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36
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37 for _, services in pairs(portmanager.get_registered_services()) do
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38 for _, service in ipairs(services) do
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39 add_service(service);
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40 end
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41 end
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43 local buffers = {};
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44
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45 local listener = { default_mode = max_buffer_len };
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46
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47 function listener.onconnect(conn)
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48 local sock = conn:socket();
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49 if sock.getalpn then
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50 local selected_proto = sock:getalpn();
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51 local service = service_by_protocol[selected_proto];
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52 if service then
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53 module:log("debug", "Routing incoming connection to %s based on ALPN %q", service.name, selected_proto);
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54 local next_listener = service.listener;
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55 conn:setlistener(next_listener);
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56 conn:set_mode(next_listener.default_mode or default_mode);
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57 local onconnect = next_listener.onconnect;
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58 if onconnect then return onconnect(conn) end
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59 end
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60 end
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61 end
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62
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63 function listener.onincoming(conn, data)
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64 if not data then return; end
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65 local buf = buffers[conn];
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66 buf = buf and buf..data or data;
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67 for service, multiplex_pattern in pairs(available_services) do
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68 if buf:match(multiplex_pattern) then
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69 module:log("debug", "Routing incoming connection to %s", service.name);
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70 local next_listener = service.listener;
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71 conn:setlistener(next_listener);
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72 conn:set_mode(next_listener.default_mode or default_mode);
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73 local onconnect = next_listener.onconnect;
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74 if onconnect then onconnect(conn) end
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75 return next_listener.onincoming(conn, buf);
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76 end
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77 end
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78 if #buf > max_buffer_len then -- Give up
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79 conn:close();
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80 else
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81 buffers[conn] = buf;
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82 end
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83 end
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84
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85 function listener.ondisconnect(conn)
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86 buffers[conn] = nil; -- warn if no buffer?
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87 end
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88
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89 listener.ondetach = listener.ondisconnect;
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90
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91 module:provides("net", {
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92 name = "multiplex";
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93 config_prefix = "";
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94 listener = listener;
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95 });
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96
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97 module:provides("net", {
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98 name = "multiplex_ssl";
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99 config_prefix = "ssl";
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100 encryption = "ssl";
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101 ssl_config = {
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102 alpn = function ()
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103 return available_protocols;
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104 end;
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105 };
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106 listener = listener;
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107 });