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-rw-r--r--core/portmanager.lua194
1 files changed, 194 insertions, 0 deletions
diff --git a/core/portmanager.lua b/core/portmanager.lua
new file mode 100644
index 00000000..da238dba
--- /dev/null
+++ b/core/portmanager.lua
@@ -0,0 +1,194 @@
+
+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 = 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
+
+module("portmanager", package.seeall);
+
+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(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 = set.new(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);
+
+ 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
+ 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(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;