diff options
Diffstat (limited to 'core/portmanager.lua')
| -rw-r--r-- | core/portmanager.lua | 194 |
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; |