Diff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/portmanager.lua	Sun Apr 29 02:10:55 2012 +0100
@@ -0,0 +1,206 @@
+local config = require "core.configmanager";
+local server = require "net.server";
+
+local log = require "util.logger".init("portmanager");
+local multitable = require "util.multitable";
+local set = require "util.set";
+
+local table, package = table, package;
+local setmetatable, rawset, rawget = setmetatable, rawset, rawget;
+local type, tonumber = type, tonumber;
+
+local prosody = prosody;
+local fire_event = prosody.events.fire_event;
+
+module "portmanager";
+
+--- Config
+
+local default_interfaces = { "*" };
+local default_local_interfaces = { "127.0.0.1" };
+if config.get("*", "use_ipv6") then
+	table.insert(default_interfaces, "::");
+	table.insert(default_local_interfaces, "::1");
+end
+
+--- Private state
+
+-- service_name -> { service_info, ... }
+local services = setmetatable({}, { __index = function (t, k) rawset(t, k, {}); return rawget(t, k); end });
+
+-- service_name, interface (string), port (number)
+local active_services = multitable.new();
+
+--- Private helpers
+
+local function error_to_friendly_message(service_name, port, err)
+	local friendly_message = err;
+	if err:match(" in use") then
+		-- FIXME: Use service_name here
+		if port == 5222 or port == 5223 or port == 5269 then
+			friendly_message = "check that Prosody or another XMPP server is "
+				.."not already running and using this port";
+		elseif port == 80 or port == 81 then
+			friendly_message = "check that a HTTP server is not already using "
+				.."this port";
+		elseif port == 5280 then
+			friendly_message = "check that Prosody or a BOSH connection manager "
+				.."is not already running";
+		else
+			friendly_message = "this port is in use by another application";
+		end
+	elseif err:match("permission") then
+		friendly_message = "Prosody does not have sufficient privileges to use this port";
+	elseif err == "no ssl context" then
+		if not config.get("*", "core", "ssl") then
+			friendly_message = "there is no 'ssl' config under Host \"*\" which is "
+				.."require for legacy SSL ports";
+		else
+			friendly_message = "initializing SSL support failed, see previous log entries";
+		end
+	end
+	return friendly_message;
+end
+
+prosody.events.add_handler("item-added/net-provider", function (event)
+	local item = event.item;
+	register_service(item.name, item);
+end);
+prosody.events.add_handler("item-removed/net-provider", function (event)
+	local item = event.item;
+	unregister_service(item.name, item);
+end);
+
+--- Public API
+
+function activate(service_name)
+	local service_info = services[service_name][1];
+	if not service_info then
+		return nil, "Unknown service: "..service_name;
+	end
+	
+	local listener = service_info.listener;
+
+	local config_prefix = (service_info.config_prefix or service_name).."_";
+	if config_prefix == "_" then
+		config_prefix = "";
+	end
+
+	local bind_interfaces = config.get("*", config_prefix.."interfaces")
+		or config.get("*", config_prefix.."interface") -- COMPAT w/pre-0.9
+		or (service_info.private and default_local_interfaces)
+		or config.get("*", "interfaces")
+		or config.get("*", "interface") -- COMPAT w/pre-0.9
+		or listener.default_interface -- COMPAT w/pre0.9
+		or default_interfaces
+	bind_interfaces = set.new(type(bind_interfaces)~="table" and {bind_interfaces} or bind_interfaces);
+	
+	local bind_ports = set.new(config.get("*", config_prefix.."ports")
+		or service_info.default_ports
+		or {service_info.default_port
+		    or listener.default_port -- COMPAT w/pre-0.9
+		   });
+
+	local mode = listener.default_mode or "*a";
+	local ssl;
+	if service_info.encryption == "ssl" then
+		ssl = prosody.global_ssl_ctx;
+		if not ssl then
+			return nil, "global-ssl-context-required";
+		end
+	end
+	
+	for interface in bind_interfaces do
+		for port in bind_ports do
+			port = tonumber(port);
+			if #active_services:search(nil, interface, port) > 0 then
+				log("error", "Multiple services configured to listen on the same port ([%s]:%d): %s, %s", interface, port, active_services:search(nil, interface, port)[1][1].service.name or "<unnamed>", service_name or "<unnamed>");
+			else
+				local handler, err = server.addserver(interface, port, listener, mode, ssl);
+				if not handler then
+					log("error", "Failed to open server port %d on %s, %s", port, interface, error_to_friendly_message(service_name, port, err));
+				else
+					log("debug", "Added listening service %s to [%s]:%d", service_name, interface, port);
+					active_services:add(service_name, interface, port, {
+						server = handler;
+						service = service_info;
+					});
+				end
+			end
+		end
+	end
+	log("info", "Activated service '%s'", service_name);
+	return true;
+end
+
+function deactivate(service_name)
+	local active = active_services:search(service_name)[1];
+	if not active then return; end
+	for interface, ports in pairs(active) do
+		for port, active_service in pairs(ports) do
+			close(interface, port);
+		end
+	end
+	log("info", "Deactivated service '%s'", service_name);
+end
+
+function register_service(service_name, service_info)
+	table.insert(services[service_name], service_info);
+
+	if not active_services:get(service_name) then
+		log("debug", "No active service for %s, activating...", service_name);
+		local ok, err = activate(service_name);
+		if not ok then
+			log("error", "Failed to activate service '%s': %s", service_name, err or "unknown error");
+		end
+	end
+	
+	fire_event("service-added", { name = service_name, service = service_info });
+	return true;
+end
+
+function unregister_service(service_name, service_info)
+	local service_info_list = services[service_name];
+	for i, service in ipairs(service_info_list) do
+		if service == service_info then
+			table.remove(service_info_list, i);
+		end
+	end
+	if active_services[service_name] == service_info then
+		deactivate(service_name);
+		if #service_info_list > 0 then -- Other services registered with this name
+			activate(service_name); -- Re-activate with the next available one
+		end
+	end
+	fire_event("service-removed", { name = service_name, service = service_info });
+end
+
+function close(interface, port)
+	local service, server = get_service_at(interface, port);
+	if not service then
+		return false, "port-not-open";
+	end
+	server:close();
+	active_services:remove(service.name, interface, port);
+	log("debug", "Removed listening service %s from [%s]:%d", service.name, interface, port);
+	return true;
+end
+
+function get_service_at(interface, port)
+	local data = active_services:search(nil, interface, port)[1][1];
+	return data.service, data.server;
+end
+
+function get_service(service_name)
+	return services[service_name];
+end
+
+function get_active_services(...)
+	return active_services;
+end
+
+function get_registered_services()
+	return services;
+end
+
+return _M;