portmanager: One manager to, in the darkness, bind them

1 files changed, 132 insertions, 0 deletions

diff --git a/core/portmanager.lua b/core/portmanager.lua
new file mode 100644
index 00000000..a460cd6a
--- /dev/null
+++ b/core/portmanager.lua
@@ -0,0 +1,132 @@
+
+local multitable = require "util.multitable";
+local fire_event = prosody.events.fire_event;
+
+--- 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 = {};
+
+-- service_name, interface (string), port (number)
+local active_services = multitable.new();
+
+--- Private helpers
+
+local function error_to_friendly_message(service_name, 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
+
+module("portmanager", package.seeall);
+
+--- Public API
+
+function activate_service(service_name)
+	local service_info = services[service_name];
+	if not service_info then
+		return nil, "Unknown service: "..service_name;
+	end
+
+	local bind_interfaces = set.new(config.get("*", service_name.."_interfaces")
+		or config.get("*", service_name.."_interface") -- COMPAT w/pre-0.9
+		or config.get("*", "interfaces")
+		or config.get("*", "interface") -- COMPAT w/pre-0.9
+		or (service_info.private and default_local_interfaces)
+		or service_info.default_interface -- COMPAT w/pre0.9
+		or default_interfaces);
+	
+	local bind_ports = set.new(config.get("*", service_name.."_ports")
+		or (service_info.multiplex and config.get("*", "ports"))
+		or service_info.default_ports
+		or {service_info.default_port});
+
+	local listener = service_info.listener;
+	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
+			if not service_info.multiplex and #active_services:search(nil, interface, port) > 0 then
+				log("error", "Multiple services configured to listen on the same port: %s, %s", table.concat(active_services:search(nil, interface, port), ", "), service_name);
+			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, 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);
+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
+			active_service:close();
+			active_services:remove(service_name, interface, port, active_service);
+			log("debug", "Removed listening service %s from [%s]:%d", service_name, interface, port);
+		end
+	end
+	log("info", "Deactivated service '%s'", service_name);
+end
+
+function register_service(service_name, service_info)
+	services[service_name] = service_info;
+
+	if not active_services[service_name] then
+		activate_service(service_name);
+	end
+	
+	fire_event("service-added", { name = service_name, service = service_info });
+	return true;
+end
+
+
+return _M;