diff options
| -rw-r--r-- | net/server_event.lua | 1572 | ||||
| -rw-r--r-- | net/server_select.lua | 1842 |
2 files changed, 1707 insertions, 1707 deletions
diff --git a/net/server_event.lua b/net/server_event.lua index 99e972d7..21d6156c 100644 --- a/net/server_event.lua +++ b/net/server_event.lua @@ -1,786 +1,786 @@ ---[[
-
-
- server.lua based on lua/libevent by blastbeat
-
- notes:
- -- when using luaevent, never register 2 or more EV_READ at one socket, same for EV_WRITE
- -- you cant even register a new EV_READ/EV_WRITE callback inside another one
- -- never call eventcallback:close( ) from inside eventcallback
- -- to do some of the above, use timeout events or something what will called from outside
- -- dont let garbagecollect eventcallbacks, as long they are running
- -- when using luasec, there are 4 cases of timeout errors: wantread or wantwrite during reading or writing
-
---]]
-
-
-local SCRIPT_NAME = "server_event.lua"
-local SCRIPT_VERSION = "0.05"
-local SCRIPT_AUTHOR = "blastbeat"
-local LAST_MODIFIED = "2009/11/20"
-
-local cfg = {
- MAX_CONNECTIONS = 100000, -- max per server connections (use "ulimit -n" on *nix)
- MAX_HANDSHAKE_ATTEMPS = 10, -- attemps to finish ssl handshake
- HANDSHAKE_TIMEOUT = 1, -- timout in seconds per handshake attemp
- MAX_READ_LENGTH = 1024 * 1024 * 1024 * 1024, -- max bytes allowed to read from sockets
- MAX_SEND_LENGTH = 1024 * 1024 * 1024 * 1024, -- max bytes size of write buffer (for writing on sockets)
- ACCEPT_DELAY = 10, -- seconds to wait until the next attemp of a full server to accept
- READ_TIMEOUT = 60 * 30, -- timeout in seconds for read data from socket
- WRITE_TIMEOUT = 30, -- timeout in seconds for write data on socket
- CONNECT_TIMEOUT = 10, -- timeout in seconds for connection attemps
- CLEAR_DELAY = 5, -- seconds to wait for clearing interface list (and calling ondisconnect listeners)
- DEBUG = true, -- show debug messages
-}
-
-local function use(x) return rawget(_G, x); end
-local print = use "print"
-local pcall = use "pcall"
-local ipairs = use "ipairs"
-local string = use "string"
-local select = use "select"
-local require = use "require"
-local tostring = use "tostring"
-local coroutine = use "coroutine"
-local setmetatable = use "setmetatable"
-
-local ssl = use "ssl"
-local socket = use "socket"
-
-local log = require ("util.logger").init("socket")
-
-local function debug(...)
- return log("debug", ("%s "):rep(select('#', ...)), ...)
-end
-local vdebug = debug;
-
-local bitor = ( function( ) -- thx Rici Lake
- local hasbit = function( x, p )
- return x % ( p + p ) >= p
- end
- return function( x, y )
- local p = 1
- local z = 0
- local limit = x > y and x or y
- while p <= limit do
- if hasbit( x, p ) or hasbit( y, p ) then
- z = z + p
- end
- p = p + p
- end
- return z
- end
-end )( )
-
-local event = require "luaevent.core"
-local base = event.new( )
-local EV_READ = event.EV_READ
-local EV_WRITE = event.EV_WRITE
-local EV_TIMEOUT = event.EV_TIMEOUT
-
-local EV_READWRITE = bitor( EV_READ, EV_WRITE )
-
-local interfacelist = ( function( ) -- holds the interfaces for sockets
- local array = { }
- local len = 0
- return function( method, arg )
- if "add" == method then
- len = len + 1
- array[ len ] = arg
- arg:_position( len )
- return len
- elseif "delete" == method then
- if len <= 0 then
- return nil, "array is already empty"
- end
- local position = arg:_position() -- get position in array
- if position ~= len then
- local interface = array[ len ] -- get last interface
- array[ position ] = interface -- copy it into free position
- array[ len ] = nil -- free last position
- interface:_position( position ) -- set new position in array
- else -- free last position
- array[ len ] = nil
- end
- len = len - 1
- return len
- else
- return array
- end
- end
-end )( )
-
--- Client interface methods
-local interface_mt
-do
- interface_mt = {}; interface_mt.__index = interface_mt;
-
- local addevent = base.addevent
- local coroutine_wrap, coroutine_yield = coroutine.wrap,coroutine.yield
- local string_len = string.len
-
- -- Private methods
- function interface_mt:_position(new_position)
- self.position = new_position or self.position
- return self.position;
- end
- function interface_mt:_close() -- regs event to start self:_destroy()
- local callback = function( )
- self:_destroy();
- self.eventclose = nil
- return -1
- end
- self.eventclose = addevent( base, nil, EV_TIMEOUT, callback, 0 )
- return true
- end
-
- function interface_mt:_start_connection(plainssl) -- should be called from addclient
- local callback = function( event )
- if EV_TIMEOUT == event then -- timout during connection
- self.fatalerror = "connection timeout"
- self:ontimeout() -- call timeout listener
- self:_close()
- debug( "new connection failed. id:", self.id, "error:", self.fatalerror )
- else
- if plainssl then -- start ssl session
- self:_start_ssl( self.listener.onconnect )
- else -- normal connection
- self:_start_session( self.listener.onconnect )
- end
- debug( "new connection established. id:", self.id )
- end
- self.eventconnect = nil
- return -1
- end
- self.eventconnect = addevent( base, self.conn, EV_WRITE, callback, cfg.CONNECT_TIMEOUT )
- return true
- end
- function interface_mt:_start_session(onconnect) -- new session, for example after startssl
- if self.type == "client" then
- local callback = function( )
- self:_lock( false, false, false )
- --vdebug( "start listening on client socket with id:", self.id )
- self.eventread = addevent( base, self.conn, EV_READ, self.readcallback, cfg.READ_TIMEOUT ) -- register callback
- self:onconnect()
- self.eventsession = nil
- return -1
- end
- self.eventsession = addevent( base, nil, EV_TIMEOUT, callback, 0 )
- else
- self:_lock( false )
- --vdebug( "start listening on server socket with id:", self.id )
- self.eventread = addevent( base, self.conn, EV_READ, self.readcallback ) -- register callback
- end
- return true
- end
- function interface_mt:_start_ssl(arg) -- old socket will be destroyed, therefore we have to close read/write events first
- --vdebug( "starting ssl session with client id:", self.id )
- local _
- _ = self.eventread and self.eventread:close( ) -- close events; this must be called outside of the event callbacks!
- _ = self.eventwrite and self.eventwrite:close( )
- self.eventread, self.eventwrite = nil, nil
- local err
- self.conn, err = ssl.wrap( self.conn, self._sslctx )
- if err then
- self.fatalerror = err
- self.conn = nil -- cannot be used anymore
- if "onconnect" == arg then
- self.ondisconnect = nil -- dont call this when client isnt really connected
- end
- self:_close()
- debug( "fatal error while ssl wrapping:", err )
- return false
- end
- self.conn:settimeout( 0 ) -- set non blocking
- local handshakecallback = coroutine_wrap(
- function( event )
- local _, err
- local attempt = 0
- local maxattempt = cfg.MAX_HANDSHAKE_ATTEMPS
- while attempt < 1000 do -- no endless loop
- attempt = attempt + 1
- debug( "ssl handshake of client with id:"..tostring(self).."attemp:"..attempt )
- if attempt > maxattempt then
- self.fatalerror = "max handshake attemps exceeded"
- elseif EV_TIMEOUT == event then
- self.fatalerror = "timeout during handshake"
- else
- _, err = self.conn:dohandshake( )
- if not err then
- self:_lock( false, false, false ) -- unlock the interface; sending, closing etc allowed
- self.send = self.conn.send -- caching table lookups with new client object
- self.receive = self.conn.receive
- local onsomething
- if "onconnect" == arg then -- trigger listener
- onsomething = self.onconnect
- else
- onsomething = self.onsslconnection
- end
- self:_start_session( onsomething )
- debug( "ssl handshake done" )
- self.eventhandshake = nil
- return -1
- end
- debug( "error during ssl handshake:", err )
- if err == "wantwrite" then
- event = EV_WRITE
- elseif err == "wantread" then
- event = EV_READ
- else
- self.fatalerror = err
- end
- end
- if self.fatalerror then
- if "onconnect" == arg then
- self.ondisconnect = nil -- dont call this when client isnt really connected
- end
- self:_close()
- debug( "handshake failed because:", self.fatalerror )
- self.eventhandshake = nil
- return -1
- end
- event = coroutine_yield( event, cfg.HANDSHAKE_TIMEOUT ) -- yield this monster...
- end
- end
- )
- debug "starting handshake..."
- self:_lock( false, true, true ) -- unlock read/write events, but keep interface locked
- self.eventhandshake = addevent( base, self.conn, EV_READWRITE, handshakecallback, cfg.HANDSHAKE_TIMEOUT )
- return true
- end
- function interface_mt:_destroy() -- close this interface + events and call last listener
- debug( "closing client with id:", self.id )
- self:_lock( true, true, true ) -- first of all, lock the interface to avoid further actions
- local _
- _ = self.eventread and self.eventread:close( ) -- close events; this must be called outside of the event callbacks!
- if self.type == "client" then
- _ = self.eventwrite and self.eventwrite:close( )
- _ = self.eventhandshake and self.eventhandshake:close( )
- _ = self.eventstarthandshake and self.eventstarthandshake:close( )
- _ = self.eventconnect and self.eventconnect:close( )
- _ = self.eventsession and self.eventsession:close( )
- _ = self.eventwritetimeout and self.eventwritetimeout:close( )
- _ = self.eventreadtimeout and self.eventreadtimeout:close( )
- _ = self.ondisconnect and self:ondisconnect( self.fatalerror ) -- call ondisconnect listener (wont be the case if handshake failed on connect)
- _ = self.conn and self.conn:close( ) -- close connection, must also be called outside of any socket registered events!
- _ = self._server and self._server:counter(-1);
- self.eventread, self.eventwrite = nil, nil
- self.eventstarthandshake, self.eventhandshake, self.eventclose = nil, nil, nil
- self.readcallback, self.writecallback = nil, nil
- else
- self.conn:close( )
- self.eventread, self.eventclose = nil, nil
- self.interface, self.readcallback = nil, nil
- end
- interfacelist( "delete", self )
- return true
- end
-
- function interface_mt:_lock(nointerface, noreading, nowriting) -- lock or unlock this interface or events
- self.nointerface, self.noreading, self.nowriting = nointerface, noreading, nowriting
- return nointerface, noreading, nowriting
- end
-
- function interface_mt:counter(c)
- if c then
- self._connections = self._connections + c
- end
- return self._connections
- end
-
- -- Public methods
- function interface_mt:write(data)
- if self.nowriting then return nil, "locked" end
- --vdebug( "try to send data to client, id/data:", self.id, data )
- data = tostring( data )
- local len = string_len( data )
- local total = len + self.writebufferlen
- if total > cfg.MAX_SEND_LENGTH then -- check buffer length
- local err = "send buffer exceeded"
- debug( "error:", err ) -- to much, check your app
- return nil, err
- end
- self.writebuffer = self.writebuffer .. data -- new buffer
- self.writebufferlen = total
- if not self.eventwrite then -- register new write event
- --vdebug( "register new write event" )
- self.eventwrite = addevent( base, self.conn, EV_WRITE, self.writecallback, cfg.WRITE_TIMEOUT )
- end
- return true
- end
- function interface_mt:close(now)
- if self.nointerface then return nil, "locked"; end
- debug( "try to close client connection with id:", self.id )
- if self.type == "client" then
- self.fatalerror = "client to close"
- if ( not self.eventwrite ) or now then -- try to close immediately
- self:_lock( true, true, true )
- self:_close()
- return true
- else -- wait for incomplete write request
- self:_lock( true, true, false )
- debug "closing delayed until writebuffer is empty"
- return nil, "writebuffer not empty, waiting"
- end
- else
- debug( "try to close server with id:", self.id, "args:", now )
- self.fatalerror = "server to close"
- self:_lock( true )
- local count = 0
- for _, item in ipairs( interfacelist( ) ) do
- if ( item.type ~= "server" ) and ( item._server == self ) then -- client/server match
- if item:close( now ) then -- writebuffer was empty
- count = count + 1
- end
- end
- end
- local timeout = 0 -- dont wait for unfinished writebuffers of clients...
- if not now then
- timeout = cfg.WRITE_TIMEOUT -- ...or wait for it
- end
- self:_close( timeout ) -- add new event to remove the server interface
- debug( "seconds remained until server is closed:", timeout )
- return count -- returns finished clients with empty writebuffer
- end
- end
-
- function interface_mt:server()
- return self._server or self;
- end
-
- function interface_mt:port()
- return self._port
- end
-
- function interface_mt:ip()
- return self._ip
- end
-
- function interface_mt:ssl()
- return self._usingssl
- end
-
- function interface_mt:type()
- return self._type or "client"
- end
-
- function interface_mt:connections()
- return self._connections
- end
-
- function interface_mt:address()
- return self.addr
- end
-
- function interface_mt:set_sslctx(sslctx)
- self._sslctx = sslctx;
- if sslctx then
- self.starttls = nil; -- use starttls() of interface_mt
- else
- self.starttls = false; -- prevent starttls()
- end
- end
-
- function interface_mt:set_send(new_send)
- -- No-op, we always use the underlying connection's send
- end
-
- function interface_mt:starttls()
- debug( "try to start ssl at client id:", self.id )
- local err
- if not self._sslctx then -- no ssl available
- err = "no ssl context available"
- elseif self._usingssl then -- startssl was already called
- err = "ssl already active"
- end
- if err then
- debug( "error:", err )
- return nil, err
- end
- self._usingssl = true
- self.startsslcallback = function( ) -- we have to start the handshake outside of a read/write event
- self.startsslcallback = nil
- self:_start_ssl();
- self.eventstarthandshake = nil
- return -1
- end
- if not self.eventwrite then
- self:_lock( true, true, true ) -- lock the interface, to not disturb the handshake
- self.eventstarthandshake = addevent( base, nil, EV_TIMEOUT, self.startsslcallback, 0 ) -- add event to start handshake
- else -- wait until writebuffer is empty
- self:_lock( true, true, false )
- debug "ssl session delayed until writebuffer is empty..."
- end
- return true
- end
-
- -- Stub handlers
- function interface_mt:onconnect()
- end
- function interface_mt:onincoming()
- end
- function interface_mt:ondisconnect()
- end
- function interface_mt:ontimeout()
- end
-end
-
--- End of client interface methods
-
-local handleclient;
-do
- local string_sub = string.sub -- caching table lookups
- local string_len = string.len
- local addevent = base.addevent
- local coroutine_wrap = coroutine.wrap
- local socket_gettime = socket.gettime
- local coroutine_yield = coroutine.yield
- function handleclient( client, ip, port, server, pattern, listener, _, sslctx ) -- creates an client interface
- --vdebug("creating client interfacce...")
- local interface = {
- type = "client";
- conn = client;
- currenttime = socket_gettime( ); -- safe the origin
- writebuffer = ""; -- writebuffer
- writebufferlen = 0; -- length of writebuffer
- send = client.send; -- caching table lookups
- receive = client.receive;
- onconnect = listener.onconnect; -- will be called when client disconnects
- ondisconnect = listener.ondisconnect; -- will be called when client disconnects
- onincoming = listener.onincoming; -- will be called when client sends data
- ontimeout = listener.ontimeout; -- called when fatal socket timeout occurs
- eventread = false, eventwrite = false, eventclose = false,
- eventhandshake = false, eventstarthandshake = false; -- event handler
- eventconnect = false, eventsession = false; -- more event handler...
- eventwritetimeout = false; -- even more event handler...
- eventreadtimeout = false;
- fatalerror = false; -- error message
- writecallback = false; -- will be called on write events
- readcallback = false; -- will be called on read events
- nointerface = true; -- lock/unlock parameter of this interface
- noreading = false, nowriting = false; -- locks of the read/writecallback
- startsslcallback = false; -- starting handshake callback
- position = false; -- position of client in interfacelist
-
- -- Properties
- _ip = ip, _port = port, _server = server, _pattern = pattern,
- _sslctx = sslctx; -- parameters
- _usingssl = false; -- client is using ssl;
- }
- if not sslctx then
- interface.starttls = false -- don't allow TLS
- end
- interface.id = tostring(interface):match("%x+$");
- interface.writecallback = function( event ) -- called on write events
- --vdebug( "new client write event, id/ip/port:", interface, ip, port )
- if interface.nowriting or ( interface.fatalerror and ( "client to close" ~= interface.fatalerror ) ) then -- leave this event
- --vdebug( "leaving this event because:", interface.nowriting or interface.fatalerror )
- interface.eventwrite = false
- return -1
- end
- if EV_TIMEOUT == event then -- took too long to write some data to socket -> disconnect
- interface.fatalerror = "timeout during writing"
- debug( "writing failed:", interface.fatalerror )
- interface:_close()
- interface.eventwrite = false
- return -1
- else -- can write :)
- if interface._usingssl then -- handle luasec
- if interface.eventreadtimeout then -- we have to read first
- local ret = interface.readcallback( ) -- call readcallback
- --vdebug( "tried to read in writecallback, result:", ret )
- end
- if interface.eventwritetimeout then -- luasec only
- interface.eventwritetimeout:close( ) -- first we have to close timeout event which where regged after a wantread error
- interface.eventwritetimeout = false
- end
- end
- local succ, err, byte = interface.conn:send( interface.writebuffer, 1, interface.writebufferlen )
- --vdebug( "write data:", interface.writebuffer, "error:", err, "part:", byte )
- if succ then -- writing succesful
- interface.writebuffer = ""
- interface.writebufferlen = 0
- if interface.fatalerror then
- debug "closing client after writing"
- interface:_close() -- close interface if needed
- elseif interface.startsslcallback then -- start ssl connection if needed
- debug "starting ssl handshake after writing"
- interface.eventstarthandshake = addevent( base, nil, EV_TIMEOUT, interface.startsslcallback, 0 )
- elseif interface.eventreadtimeout then
- return EV_WRITE, EV_TIMEOUT
- end
- interface.eventwrite = nil
- return -1
- elseif byte then -- want write again
- --vdebug( "writebuffer is not empty:", err )
- interface.writebuffer = string_sub( interface.writebuffer, byte + 1, interface.writebufferlen ) -- new buffer
- interface.writebufferlen = interface.writebufferlen - byte
- if "wantread" == err then -- happens only with luasec
- local callback = function( )
- interface:_close()
- interface.eventwritetimeout = nil
- return evreturn, evtimeout
- end
- interface.eventwritetimeout = addevent( base, nil, EV_TIMEOUT, callback, cfg.WRITE_TIMEOUT ) -- reg a new timeout event
- debug( "wantread during write attemp, reg it in readcallback but dont know what really happens next..." )
- -- hopefully this works with luasec; its simply not possible to use 2 different write events on a socket in luaevent
- return -1
- end
- return EV_WRITE, cfg.WRITE_TIMEOUT
- else -- connection was closed during writing or fatal error
- interface.fatalerror = err or "fatal error"
- debug( "connection failed in write event:", interface.fatalerror )
- interface:_close()
- interface.eventwrite = nil
- return -1
- end
- end
- end
-
- interface.readcallback = function( event ) -- called on read events
- --vdebug( "new client read event, id/ip/port:", tostring(interface.id), tostring(ip), tostring(port) )
- if interface.noreading or interface.fatalerror then -- leave this event
- --vdebug( "leaving this event because:", tostring(interface.noreading or interface.fatalerror) )
- interface.eventread = nil
- return -1
- end
- if EV_TIMEOUT == event then -- took too long to get some data from client -> disconnect
- interface.fatalerror = "timeout during receiving"
- debug( "connection failed:", interface.fatalerror )
- interface:_close()
- interface.eventread = nil
- return -1
- else -- can read
- if interface._usingssl then -- handle luasec
- if interface.eventwritetimeout then -- ok, in the past writecallback was regged
- local ret = interface.writecallback( ) -- call it
- --vdebug( "tried to write in readcallback, result:", tostring(ret) )
- end
- if interface.eventreadtimeout then
- interface.eventreadtimeout:close( )
- interface.eventreadtimeout = nil
- end
- end
- local buffer, err, part = interface.conn:receive( pattern ) -- receive buffer with "pattern"
- --vdebug( "read data:", tostring(buffer), "error:", tostring(err), "part:", tostring(part) )
- buffer = buffer or part or ""
- local len = string_len( buffer )
- if len > cfg.MAX_READ_LENGTH then -- check buffer length
- interface.fatalerror = "receive buffer exceeded"
- debug( "fatal error:", interface.fatalerror )
- interface:_close()
- interface.eventread = nil
- return -1
- end
- interface.onincoming( interface, buffer, err ) -- send new data to listener
- if err and ( err ~= "timeout" and err ~= "wantread" ) then
- if "wantwrite" == err then -- need to read on write event
- if not interface.eventwrite then -- register new write event if needed
- interface.eventwrite = addevent( base, interface.conn, EV_WRITE, interface.writecallback, cfg.WRITE_TIMEOUT )
- end
- interface.eventreadtimeout = addevent( base, nil, EV_TIMEOUT,
- function( )
- interface:_close()
- end, cfg.READ_TIMEOUT
- )
- debug( "wantwrite during read attemp, reg it in writecallback but dont know what really happens next..." )
- -- to be honest i dont know what happens next, if it is allowed to first read, the write etc...
- else -- connection was closed or fatal error
- interface.fatalerror = err
- debug( "connection failed in read event:", interface.fatalerror )
- interface:_close()
- interface.eventread = nil
- return -1
- end
- end
- return EV_READ, cfg.READ_TIMEOUT
- end
- end
-
- client:settimeout( 0 ) -- set non blocking
- setmetatable(interface, interface_mt)
- interfacelist( "add", interface ) -- add to interfacelist
- return interface
- end
-end
-
-local handleserver
-do
- function handleserver( server, addr, port, pattern, listener, sslctx, startssl ) -- creates an server interface
- debug "creating server interface..."
- local interface = {
- _connections = 0;
-
- conn = server;
- onconnect = listener.onconnect; -- will be called when new client connected
- eventread = false; -- read event handler
- eventclose = false; -- close event handler
- readcallback = false; -- read event callback
- fatalerror = false; -- error message
- nointerface = true; -- lock/unlock parameter
- }
- interface.id = tostring(interface):match("%x+$");
- interface.readcallback = function( event ) -- server handler, called on incoming connections
- --vdebug( "server can accept, id/addr/port:", interface, addr, port )
- if interface.fatalerror then
- --vdebug( "leaving this event because:", self.fatalerror )
- interface.eventread = nil
- return -1
- end
- local delay = cfg.ACCEPT_DELAY
- if EV_TIMEOUT == event then
- if interface._connections >= cfg.MAX_CONNECTIONS then -- check connection count
- debug( "to many connections, seconds to wait for next accept:", delay )
- return EV_TIMEOUT, delay -- timeout...
- else
- return EV_READ -- accept again
- end
- end
- --vdebug("max connection check ok, accepting...")
- local client, err = server:accept() -- try to accept; TODO: check err
- while client do
- if interface._connections >= cfg.MAX_CONNECTIONS then
- client:close( ) -- refuse connection
- debug( "maximal connections reached, refuse client connection; accept delay:", delay )
- return EV_TIMEOUT, delay -- delay for next accept attemp
- end
- local ip, port = client:getpeername( )
- interface._connections = interface._connections + 1 -- increase connection count
- local clientinterface = handleclient( client, ip, port, interface, pattern, listener, nil, sslctx )
- --vdebug( "client id:", clientinterface, "startssl:", startssl )
- if startssl then
- clientinterface:_start_ssl( clientinterface.onconnect )
- else
- clientinterface:_start_session( clientinterface.onconnect )
- end
- debug( "accepted incoming client connection from:", ip, port )
- client, err = server:accept() -- try to accept again
- end
- return EV_READ
- end
-
- server:settimeout( 0 )
- setmetatable(interface, interface_mt)
- interfacelist( "add", interface )
- interface:_start_session()
- return interface
- end
-end
-
-local addserver = ( function( )
- return function( addr, port, listener, pattern, sslcfg, startssl ) -- TODO: check arguments
- --vdebug( "creating new tcp server with following parameters:", addr or "nil", port or "nil", sslcfg or "nil", startssl or "nil")
- local server, err = socket.bind( addr, port, cfg.ACCEPT_QUEUE ) -- create server socket
- if not server then
- debug( "creating server socket failed because:", err )
- return nil, err
- end
- local sslctx
- if sslcfg then
- if not ssl then
- debug "fatal error: luasec not found"
- return nil, "luasec not found"
- end
- sslctx, err = ssl.newcontext( sslcfg )
- if err then
- debug( "error while creating new ssl context for server socket:", err )
- return nil, err
- end
- end
- local interface = handleserver( server, addr, port, pattern, listener, sslctx, startssl ) -- new server handler
- debug( "new server created with id:", tostring(interface))
- return interface
- end
-end )( )
-
-local addclient, wrapclient
-do
- function wrapclient( client, ip, port, listeners, pattern, sslctx, startssl )
- local interface = handleclient( client, ip, port, nil, pattern, listeners, sslctx )
- interface:_start_session()
- return interface
- --function handleclient( client, ip, port, server, pattern, listener, _, sslctx ) -- creates an client interface
- end
-
- function addclient( addr, serverport, listener, pattern, localaddr, localport, sslcfg, startssl )
- local client, err = socket.tcp() -- creating new socket
- if not client then
- debug( "cannot create socket:", err )
- return nil, err
- end
- client:settimeout( 0 ) -- set nonblocking
- if localaddr then
- local res, err = client:bind( localaddr, localport, -1 )
- if not res then
- debug( "cannot bind client:", err )
- return nil, err
- end
- end
- local sslctx
- if sslcfg then -- handle ssl/new context
- if not ssl then
- debug "need luasec, but not available"
- return nil, "luasec not found"
- end
- sslctx, err = ssl.newcontext( sslcfg )
- if err then
- debug( "cannot create new ssl context:", err )
- return nil, err
- end
- end
- local res, err = client:connect( addr, serverport ) -- connect
- if res or ( err == "timeout" ) then
- local ip, port = client:getsockname( )
- local server = function( )
- return nil, "this is a dummy server interface"
- end
- local interface = wrapclient( client, ip, serverport, listeners, pattern, sslctx, startssl )
- interface:_start_connection( startssl )
- debug( "new connection id:", interface.id )
- return interface, err
- else
- debug( "new connection failed:", err )
- return nil, err
- end
- end
-end
-
-
-local loop = function( ) -- starts the event loop
- return base:loop( )
-end
-
-local newevent = ( function( )
- local add = base.addevent
- return function( ... )
- return add( base, ... )
- end
-end )( )
-
-local closeallservers = function( arg )
- for _, item in ipairs( interfacelist( ) ) do
- if item "type" == "server" then
- item( "close", arg )
- end
- end
-end
-
-return {
-
- cfg = cfg,
- base = base,
- loop = loop,
- event = event,
- event_base = base,
- addevent = newevent,
- addserver = addserver,
- addclient = addclient,
- wrapclient = wrapclient,
- closeallservers = closeallservers,
-
- __NAME = SCRIPT_NAME,
- __DATE = LAST_MODIFIED,
- __AUTHOR = SCRIPT_AUTHOR,
- __VERSION = SCRIPT_VERSION,
-
-}
+--[[ + + + server.lua based on lua/libevent by blastbeat + + notes: + -- when using luaevent, never register 2 or more EV_READ at one socket, same for EV_WRITE + -- you cant even register a new EV_READ/EV_WRITE callback inside another one + -- never call eventcallback:close( ) from inside eventcallback + -- to do some of the above, use timeout events or something what will called from outside + -- dont let garbagecollect eventcallbacks, as long they are running + -- when using luasec, there are 4 cases of timeout errors: wantread or wantwrite during reading or writing + +--]] + + +local SCRIPT_NAME = "server_event.lua" +local SCRIPT_VERSION = "0.05" +local SCRIPT_AUTHOR = "blastbeat" +local LAST_MODIFIED = "2009/11/20" + +local cfg = { + MAX_CONNECTIONS = 100000, -- max per server connections (use "ulimit -n" on *nix) + MAX_HANDSHAKE_ATTEMPS = 10, -- attemps to finish ssl handshake + HANDSHAKE_TIMEOUT = 1, -- timout in seconds per handshake attemp + MAX_READ_LENGTH = 1024 * 1024 * 1024 * 1024, -- max bytes allowed to read from sockets + MAX_SEND_LENGTH = 1024 * 1024 * 1024 * 1024, -- max bytes size of write buffer (for writing on sockets) + ACCEPT_DELAY = 10, -- seconds to wait until the next attemp of a full server to accept + READ_TIMEOUT = 60 * 30, -- timeout in seconds for read data from socket + WRITE_TIMEOUT = 30, -- timeout in seconds for write data on socket + CONNECT_TIMEOUT = 10, -- timeout in seconds for connection attemps + CLEAR_DELAY = 5, -- seconds to wait for clearing interface list (and calling ondisconnect listeners) + DEBUG = true, -- show debug messages +} + +local function use(x) return rawget(_G, x); end +local print = use "print" +local pcall = use "pcall" +local ipairs = use "ipairs" +local string = use "string" +local select = use "select" +local require = use "require" +local tostring = use "tostring" +local coroutine = use "coroutine" +local setmetatable = use "setmetatable" + +local ssl = use "ssl" +local socket = use "socket" + +local log = require ("util.logger").init("socket") + +local function debug(...) + return log("debug", ("%s "):rep(select('#', ...)), ...) +end +local vdebug = debug; + +local bitor = ( function( ) -- thx Rici Lake + local hasbit = function( x, p ) + return x % ( p + p ) >= p + end + return function( x, y ) + local p = 1 + local z = 0 + local limit = x > y and x or y + while p <= limit do + if hasbit( x, p ) or hasbit( y, p ) then + z = z + p + end + p = p + p + end + return z + end +end )( ) + +local event = require "luaevent.core" +local base = event.new( ) +local EV_READ = event.EV_READ +local EV_WRITE = event.EV_WRITE +local EV_TIMEOUT = event.EV_TIMEOUT + +local EV_READWRITE = bitor( EV_READ, EV_WRITE ) + +local interfacelist = ( function( ) -- holds the interfaces for sockets + local array = { } + local len = 0 + return function( method, arg ) + if "add" == method then + len = len + 1 + array[ len ] = arg + arg:_position( len ) + return len + elseif "delete" == method then + if len <= 0 then + return nil, "array is already empty" + end + local position = arg:_position() -- get position in array + if position ~= len then + local interface = array[ len ] -- get last interface + array[ position ] = interface -- copy it into free position + array[ len ] = nil -- free last position + interface:_position( position ) -- set new position in array + else -- free last position + array[ len ] = nil + end + len = len - 1 + return len + else + return array + end + end +end )( ) + +-- Client interface methods +local interface_mt +do + interface_mt = {}; interface_mt.__index = interface_mt; + + local addevent = base.addevent + local coroutine_wrap, coroutine_yield = coroutine.wrap,coroutine.yield + local string_len = string.len + + -- Private methods + function interface_mt:_position(new_position) + self.position = new_position or self.position + return self.position; + end + function interface_mt:_close() -- regs event to start self:_destroy() + local callback = function( ) + self:_destroy(); + self.eventclose = nil + return -1 + end + self.eventclose = addevent( base, nil, EV_TIMEOUT, callback, 0 ) + return true + end + + function interface_mt:_start_connection(plainssl) -- should be called from addclient + local callback = function( event ) + if EV_TIMEOUT == event then -- timout during connection + self.fatalerror = "connection timeout" + self:ontimeout() -- call timeout listener + self:_close() + debug( "new connection failed. id:", self.id, "error:", self.fatalerror ) + else + if plainssl then -- start ssl session + self:_start_ssl( self.listener.onconnect ) + else -- normal connection + self:_start_session( self.listener.onconnect ) + end + debug( "new connection established. id:", self.id ) + end + self.eventconnect = nil + return -1 + end + self.eventconnect = addevent( base, self.conn, EV_WRITE, callback, cfg.CONNECT_TIMEOUT ) + return true + end + function interface_mt:_start_session(onconnect) -- new session, for example after startssl + if self.type == "client" then + local callback = function( ) + self:_lock( false, false, false ) + --vdebug( "start listening on client socket with id:", self.id ) + self.eventread = addevent( base, self.conn, EV_READ, self.readcallback, cfg.READ_TIMEOUT ) -- register callback + self:onconnect() + self.eventsession = nil + return -1 + end + self.eventsession = addevent( base, nil, EV_TIMEOUT, callback, 0 ) + else + self:_lock( false ) + --vdebug( "start listening on server socket with id:", self.id ) + self.eventread = addevent( base, self.conn, EV_READ, self.readcallback ) -- register callback + end + return true + end + function interface_mt:_start_ssl(arg) -- old socket will be destroyed, therefore we have to close read/write events first + --vdebug( "starting ssl session with client id:", self.id ) + local _ + _ = self.eventread and self.eventread:close( ) -- close events; this must be called outside of the event callbacks! + _ = self.eventwrite and self.eventwrite:close( ) + self.eventread, self.eventwrite = nil, nil + local err + self.conn, err = ssl.wrap( self.conn, self._sslctx ) + if err then + self.fatalerror = err + self.conn = nil -- cannot be used anymore + if "onconnect" == arg then + self.ondisconnect = nil -- dont call this when client isnt really connected + end + self:_close() + debug( "fatal error while ssl wrapping:", err ) + return false + end + self.conn:settimeout( 0 ) -- set non blocking + local handshakecallback = coroutine_wrap( + function( event ) + local _, err + local attempt = 0 + local maxattempt = cfg.MAX_HANDSHAKE_ATTEMPS + while attempt < 1000 do -- no endless loop + attempt = attempt + 1 + debug( "ssl handshake of client with id:"..tostring(self).."attemp:"..attempt ) + if attempt > maxattempt then + self.fatalerror = "max handshake attemps exceeded" + elseif EV_TIMEOUT == event then + self.fatalerror = "timeout during handshake" + else + _, err = self.conn:dohandshake( ) + if not err then + self:_lock( false, false, false ) -- unlock the interface; sending, closing etc allowed + self.send = self.conn.send -- caching table lookups with new client object + self.receive = self.conn.receive + local onsomething + if "onconnect" == arg then -- trigger listener + onsomething = self.onconnect + else + onsomething = self.onsslconnection + end + self:_start_session( onsomething ) + debug( "ssl handshake done" ) + self.eventhandshake = nil + return -1 + end + debug( "error during ssl handshake:", err ) + if err == "wantwrite" then + event = EV_WRITE + elseif err == "wantread" then + event = EV_READ + else + self.fatalerror = err + end + end + if self.fatalerror then + if "onconnect" == arg then + self.ondisconnect = nil -- dont call this when client isnt really connected + end + self:_close() + debug( "handshake failed because:", self.fatalerror ) + self.eventhandshake = nil + return -1 + end + event = coroutine_yield( event, cfg.HANDSHAKE_TIMEOUT ) -- yield this monster... + end + end + ) + debug "starting handshake..." + self:_lock( false, true, true ) -- unlock read/write events, but keep interface locked + self.eventhandshake = addevent( base, self.conn, EV_READWRITE, handshakecallback, cfg.HANDSHAKE_TIMEOUT ) + return true + end + function interface_mt:_destroy() -- close this interface + events and call last listener + debug( "closing client with id:", self.id ) + self:_lock( true, true, true ) -- first of all, lock the interface to avoid further actions + local _ + _ = self.eventread and self.eventread:close( ) -- close events; this must be called outside of the event callbacks! + if self.type == "client" then + _ = self.eventwrite and self.eventwrite:close( ) + _ = self.eventhandshake and self.eventhandshake:close( ) + _ = self.eventstarthandshake and self.eventstarthandshake:close( ) + _ = self.eventconnect and self.eventconnect:close( ) + _ = self.eventsession and self.eventsession:close( ) + _ = self.eventwritetimeout and self.eventwritetimeout:close( ) + _ = self.eventreadtimeout and self.eventreadtimeout:close( ) + _ = self.ondisconnect and self:ondisconnect( self.fatalerror ) -- call ondisconnect listener (wont be the case if handshake failed on connect) + _ = self.conn and self.conn:close( ) -- close connection, must also be called outside of any socket registered events! + _ = self._server and self._server:counter(-1); + self.eventread, self.eventwrite = nil, nil + self.eventstarthandshake, self.eventhandshake, self.eventclose = nil, nil, nil + self.readcallback, self.writecallback = nil, nil + else + self.conn:close( ) + self.eventread, self.eventclose = nil, nil + self.interface, self.readcallback = nil, nil + end + interfacelist( "delete", self ) + return true + end + + function interface_mt:_lock(nointerface, noreading, nowriting) -- lock or unlock this interface or events + self.nointerface, self.noreading, self.nowriting = nointerface, noreading, nowriting + return nointerface, noreading, nowriting + end + + function interface_mt:counter(c) + if c then + self._connections = self._connections + c + end + return self._connections + end + + -- Public methods + function interface_mt:write(data) + if self.nowriting then return nil, "locked" end + --vdebug( "try to send data to client, id/data:", self.id, data ) + data = tostring( data ) + local len = string_len( data ) + local total = len + self.writebufferlen + if total > cfg.MAX_SEND_LENGTH then -- check buffer length + local err = "send buffer exceeded" + debug( "error:", err ) -- to much, check your app + return nil, err + end + self.writebuffer = self.writebuffer .. data -- new buffer + self.writebufferlen = total + if not self.eventwrite then -- register new write event + --vdebug( "register new write event" ) + self.eventwrite = addevent( base, self.conn, EV_WRITE, self.writecallback, cfg.WRITE_TIMEOUT ) + end + return true + end + function interface_mt:close(now) + if self.nointerface then return nil, "locked"; end + debug( "try to close client connection with id:", self.id ) + if self.type == "client" then + self.fatalerror = "client to close" + if ( not self.eventwrite ) or now then -- try to close immediately + self:_lock( true, true, true ) + self:_close() + return true + else -- wait for incomplete write request + self:_lock( true, true, false ) + debug "closing delayed until writebuffer is empty" + return nil, "writebuffer not empty, waiting" + end + else + debug( "try to close server with id:", self.id, "args:", now ) + self.fatalerror = "server to close" + self:_lock( true ) + local count = 0 + for _, item in ipairs( interfacelist( ) ) do + if ( item.type ~= "server" ) and ( item._server == self ) then -- client/server match + if item:close( now ) then -- writebuffer was empty + count = count + 1 + end + end + end + local timeout = 0 -- dont wait for unfinished writebuffers of clients... + if not now then + timeout = cfg.WRITE_TIMEOUT -- ...or wait for it + end + self:_close( timeout ) -- add new event to remove the server interface + debug( "seconds remained until server is closed:", timeout ) + return count -- returns finished clients with empty writebuffer + end + end + + function interface_mt:server() + return self._server or self; + end + + function interface_mt:port() + return self._port + end + + function interface_mt:ip() + return self._ip + end + + function interface_mt:ssl() + return self._usingssl + end + + function interface_mt:type() + return self._type or "client" + end + + function interface_mt:connections() + return self._connections + end + + function interface_mt:address() + return self.addr + end + + function interface_mt:set_sslctx(sslctx) + self._sslctx = sslctx; + if sslctx then + self.starttls = nil; -- use starttls() of interface_mt + else + self.starttls = false; -- prevent starttls() + end + end + + function interface_mt:set_send(new_send) + -- No-op, we always use the underlying connection's send + end + + function interface_mt:starttls() + debug( "try to start ssl at client id:", self.id ) + local err + if not self._sslctx then -- no ssl available + err = "no ssl context available" + elseif self._usingssl then -- startssl was already called + err = "ssl already active" + end + if err then + debug( "error:", err ) + return nil, err + end + self._usingssl = true + self.startsslcallback = function( ) -- we have to start the handshake outside of a read/write event + self.startsslcallback = nil + self:_start_ssl(); + self.eventstarthandshake = nil + return -1 + end + if not self.eventwrite then + self:_lock( true, true, true ) -- lock the interface, to not disturb the handshake + self.eventstarthandshake = addevent( base, nil, EV_TIMEOUT, self.startsslcallback, 0 ) -- add event to start handshake + else -- wait until writebuffer is empty + self:_lock( true, true, false ) + debug "ssl session delayed until writebuffer is empty..." + end + return true + end + + -- Stub handlers + function interface_mt:onconnect() + end + function interface_mt:onincoming() + end + function interface_mt:ondisconnect() + end + function interface_mt:ontimeout() + end +end + +-- End of client interface methods + +local handleclient; +do + local string_sub = string.sub -- caching table lookups + local string_len = string.len + local addevent = base.addevent + local coroutine_wrap = coroutine.wrap + local socket_gettime = socket.gettime + local coroutine_yield = coroutine.yield + function handleclient( client, ip, port, server, pattern, listener, _, sslctx ) -- creates an client interface + --vdebug("creating client interfacce...") + local interface = { + type = "client"; + conn = client; + currenttime = socket_gettime( ); -- safe the origin + writebuffer = ""; -- writebuffer + writebufferlen = 0; -- length of writebuffer + send = client.send; -- caching table lookups + receive = client.receive; + onconnect = listener.onconnect; -- will be called when client disconnects + ondisconnect = listener.ondisconnect; -- will be called when client disconnects + onincoming = listener.onincoming; -- will be called when client sends data + ontimeout = listener.ontimeout; -- called when fatal socket timeout occurs + eventread = false, eventwrite = false, eventclose = false, + eventhandshake = false, eventstarthandshake = false; -- event handler + eventconnect = false, eventsession = false; -- more event handler... + eventwritetimeout = false; -- even more event handler... + eventreadtimeout = false; + fatalerror = false; -- error message + writecallback = false; -- will be called on write events + readcallback = false; -- will be called on read events + nointerface = true; -- lock/unlock parameter of this interface + noreading = false, nowriting = false; -- locks of the read/writecallback + startsslcallback = false; -- starting handshake callback + position = false; -- position of client in interfacelist + + -- Properties + _ip = ip, _port = port, _server = server, _pattern = pattern, + _sslctx = sslctx; -- parameters + _usingssl = false; -- client is using ssl; + } + if not sslctx then + interface.starttls = false -- don't allow TLS + end + interface.id = tostring(interface):match("%x+$"); + interface.writecallback = function( event ) -- called on write events + --vdebug( "new client write event, id/ip/port:", interface, ip, port ) + if interface.nowriting or ( interface.fatalerror and ( "client to close" ~= interface.fatalerror ) ) then -- leave this event + --vdebug( "leaving this event because:", interface.nowriting or interface.fatalerror ) + interface.eventwrite = false + return -1 + end + if EV_TIMEOUT == event then -- took too long to write some data to socket -> disconnect + interface.fatalerror = "timeout during writing" + debug( "writing failed:", interface.fatalerror ) + interface:_close() + interface.eventwrite = false + return -1 + else -- can write :) + if interface._usingssl then -- handle luasec + if interface.eventreadtimeout then -- we have to read first + local ret = interface.readcallback( ) -- call readcallback + --vdebug( "tried to read in writecallback, result:", ret ) + end + if interface.eventwritetimeout then -- luasec only + interface.eventwritetimeout:close( ) -- first we have to close timeout event which where regged after a wantread error + interface.eventwritetimeout = false + end + end + local succ, err, byte = interface.conn:send( interface.writebuffer, 1, interface.writebufferlen ) + --vdebug( "write data:", interface.writebuffer, "error:", err, "part:", byte ) + if succ then -- writing succesful + interface.writebuffer = "" + interface.writebufferlen = 0 + if interface.fatalerror then + debug "closing client after writing" + interface:_close() -- close interface if needed + elseif interface.startsslcallback then -- start ssl connection if needed + debug "starting ssl handshake after writing" + interface.eventstarthandshake = addevent( base, nil, EV_TIMEOUT, interface.startsslcallback, 0 ) + elseif interface.eventreadtimeout then + return EV_WRITE, EV_TIMEOUT + end + interface.eventwrite = nil + return -1 + elseif byte then -- want write again + --vdebug( "writebuffer is not empty:", err ) + interface.writebuffer = string_sub( interface.writebuffer, byte + 1, interface.writebufferlen ) -- new buffer + interface.writebufferlen = interface.writebufferlen - byte + if "wantread" == err then -- happens only with luasec + local callback = function( ) + interface:_close() + interface.eventwritetimeout = nil + return evreturn, evtimeout + end + interface.eventwritetimeout = addevent( base, nil, EV_TIMEOUT, callback, cfg.WRITE_TIMEOUT ) -- reg a new timeout event + debug( "wantread during write attemp, reg it in readcallback but dont know what really happens next..." ) + -- hopefully this works with luasec; its simply not possible to use 2 different write events on a socket in luaevent + return -1 + end + return EV_WRITE, cfg.WRITE_TIMEOUT + else -- connection was closed during writing or fatal error + interface.fatalerror = err or "fatal error" + debug( "connection failed in write event:", interface.fatalerror ) + interface:_close() + interface.eventwrite = nil + return -1 + end + end + end + + interface.readcallback = function( event ) -- called on read events + --vdebug( "new client read event, id/ip/port:", tostring(interface.id), tostring(ip), tostring(port) ) + if interface.noreading or interface.fatalerror then -- leave this event + --vdebug( "leaving this event because:", tostring(interface.noreading or interface.fatalerror) ) + interface.eventread = nil + return -1 + end + if EV_TIMEOUT == event then -- took too long to get some data from client -> disconnect + interface.fatalerror = "timeout during receiving" + debug( "connection failed:", interface.fatalerror ) + interface:_close() + interface.eventread = nil + return -1 + else -- can read + if interface._usingssl then -- handle luasec + if interface.eventwritetimeout then -- ok, in the past writecallback was regged + local ret = interface.writecallback( ) -- call it + --vdebug( "tried to write in readcallback, result:", tostring(ret) ) + end + if interface.eventreadtimeout then + interface.eventreadtimeout:close( ) + interface.eventreadtimeout = nil + end + end + local buffer, err, part = interface.conn:receive( pattern ) -- receive buffer with "pattern" + --vdebug( "read data:", tostring(buffer), "error:", tostring(err), "part:", tostring(part) ) + buffer = buffer or part or "" + local len = string_len( buffer ) + if len > cfg.MAX_READ_LENGTH then -- check buffer length + interface.fatalerror = "receive buffer exceeded" + debug( "fatal error:", interface.fatalerror ) + interface:_close() + interface.eventread = nil + return -1 + end + interface.onincoming( interface, buffer, err ) -- send new data to listener + if err and ( err ~= "timeout" and err ~= "wantread" ) then + if "wantwrite" == err then -- need to read on write event + if not interface.eventwrite then -- register new write event if needed + interface.eventwrite = addevent( base, interface.conn, EV_WRITE, interface.writecallback, cfg.WRITE_TIMEOUT ) + end + interface.eventreadtimeout = addevent( base, nil, EV_TIMEOUT, + function( ) + interface:_close() + end, cfg.READ_TIMEOUT + ) + debug( "wantwrite during read attemp, reg it in writecallback but dont know what really happens next..." ) + -- to be honest i dont know what happens next, if it is allowed to first read, the write etc... + else -- connection was closed or fatal error + interface.fatalerror = err + debug( "connection failed in read event:", interface.fatalerror ) + interface:_close() + interface.eventread = nil + return -1 + end + end + return EV_READ, cfg.READ_TIMEOUT + end + end + + client:settimeout( 0 ) -- set non blocking + setmetatable(interface, interface_mt) + interfacelist( "add", interface ) -- add to interfacelist + return interface + end +end + +local handleserver +do + function handleserver( server, addr, port, pattern, listener, sslctx, startssl ) -- creates an server interface + debug "creating server interface..." + local interface = { + _connections = 0; + + conn = server; + onconnect = listener.onconnect; -- will be called when new client connected + eventread = false; -- read event handler + eventclose = false; -- close event handler + readcallback = false; -- read event callback + fatalerror = false; -- error message + nointerface = true; -- lock/unlock parameter + } + interface.id = tostring(interface):match("%x+$"); + interface.readcallback = function( event ) -- server handler, called on incoming connections + --vdebug( "server can accept, id/addr/port:", interface, addr, port ) + if interface.fatalerror then + --vdebug( "leaving this event because:", self.fatalerror ) + interface.eventread = nil + return -1 + end + local delay = cfg.ACCEPT_DELAY + if EV_TIMEOUT == event then + if interface._connections >= cfg.MAX_CONNECTIONS then -- check connection count + debug( "to many connections, seconds to wait for next accept:", delay ) + return EV_TIMEOUT, delay -- timeout... + else + return EV_READ -- accept again + end + end + --vdebug("max connection check ok, accepting...") + local client, err = server:accept() -- try to accept; TODO: check err + while client do + if interface._connections >= cfg.MAX_CONNECTIONS then + client:close( ) -- refuse connection + debug( "maximal connections reached, refuse client connection; accept delay:", delay ) + return EV_TIMEOUT, delay -- delay for next accept attemp + end + local ip, port = client:getpeername( ) + interface._connections = interface._connections + 1 -- increase connection count + local clientinterface = handleclient( client, ip, port, interface, pattern, listener, nil, sslctx ) + --vdebug( "client id:", clientinterface, "startssl:", startssl ) + if startssl then + clientinterface:_start_ssl( clientinterface.onconnect ) + else + clientinterface:_start_session( clientinterface.onconnect ) + end + debug( "accepted incoming client connection from:", ip, port ) + client, err = server:accept() -- try to accept again + end + return EV_READ + end + + server:settimeout( 0 ) + setmetatable(interface, interface_mt) + interfacelist( "add", interface ) + interface:_start_session() + return interface + end +end + +local addserver = ( function( ) + return function( addr, port, listener, pattern, sslcfg, startssl ) -- TODO: check arguments + --vdebug( "creating new tcp server with following parameters:", addr or "nil", port or "nil", sslcfg or "nil", startssl or "nil") + local server, err = socket.bind( addr, port, cfg.ACCEPT_QUEUE ) -- create server socket + if not server then + debug( "creating server socket failed because:", err ) + return nil, err + end + local sslctx + if sslcfg then + if not ssl then + debug "fatal error: luasec not found" + return nil, "luasec not found" + end + sslctx, err = ssl.newcontext( sslcfg ) + if err then + debug( "error while creating new ssl context for server socket:", err ) + return nil, err + end + end + local interface = handleserver( server, addr, port, pattern, listener, sslctx, startssl ) -- new server handler + debug( "new server created with id:", tostring(interface)) + return interface + end +end )( ) + +local addclient, wrapclient +do + function wrapclient( client, ip, port, listeners, pattern, sslctx, startssl ) + local interface = handleclient( client, ip, port, nil, pattern, listeners, sslctx ) + interface:_start_session() + return interface + --function handleclient( client, ip, port, server, pattern, listener, _, sslctx ) -- creates an client interface + end + + function addclient( addr, serverport, listener, pattern, localaddr, localport, sslcfg, startssl ) + local client, err = socket.tcp() -- creating new socket + if not client then + debug( "cannot create socket:", err ) + return nil, err + end + client:settimeout( 0 ) -- set nonblocking + if localaddr then + local res, err = client:bind( localaddr, localport, -1 ) + if not res then + debug( "cannot bind client:", err ) + return nil, err + end + end + local sslctx + if sslcfg then -- handle ssl/new context + if not ssl then + debug "need luasec, but not available" + return nil, "luasec not found" + end + sslctx, err = ssl.newcontext( sslcfg ) + if err then + debug( "cannot create new ssl context:", err ) + return nil, err + end + end + local res, err = client:connect( addr, serverport ) -- connect + if res or ( err == "timeout" ) then + local ip, port = client:getsockname( ) + local server = function( ) + return nil, "this is a dummy server interface" + end + local interface = wrapclient( client, ip, serverport, listeners, pattern, sslctx, startssl ) + interface:_start_connection( startssl ) + debug( "new connection id:", interface.id ) + return interface, err + else + debug( "new connection failed:", err ) + return nil, err + end + end +end + + +local loop = function( ) -- starts the event loop + return base:loop( ) +end + +local newevent = ( function( ) + local add = base.addevent + return function( ... ) + return add( base, ... ) + end +end )( ) + +local closeallservers = function( arg ) + for _, item in ipairs( interfacelist( ) ) do + if item "type" == "server" then + item( "close", arg ) + end + end +end + +return { + + cfg = cfg, + base = base, + loop = loop, + event = event, + event_base = base, + addevent = newevent, + addserver = addserver, + addclient = addclient, + wrapclient = wrapclient, + closeallservers = closeallservers, + + __NAME = SCRIPT_NAME, + __DATE = LAST_MODIFIED, + __AUTHOR = SCRIPT_AUTHOR, + __VERSION = SCRIPT_VERSION, + +} diff --git a/net/server_select.lua b/net/server_select.lua index f278edd5..4c923159 100644 --- a/net/server_select.lua +++ b/net/server_select.lua @@ -1,921 +1,921 @@ ---
--- server.lua by blastbeat of the luadch project
--- Re-used here under the MIT/X Consortium License
---
--- Modifications (C) 2008-2009 Matthew Wild, Waqas Hussain
---
-
--- // wrapping luadch stuff // --
-
-local use = function( what )
- return _G[ what ]
-end
-local clean = function( tbl )
- for i, k in pairs( tbl ) do
- tbl[ i ] = nil
- end
-end
-
-local log, table_concat = require ("util.logger").init("socket"), table.concat;
-local out_put = function (...) return log("debug", table_concat{...}); end
-local out_error = function (...) return log("warn", table_concat{...}); end
-local mem_free = collectgarbage
-
-----------------------------------// DECLARATION //--
-
---// constants //--
-
-local STAT_UNIT = 1 -- byte
-
---// lua functions //--
-
-local type = use "type"
-local pairs = use "pairs"
-local ipairs = use "ipairs"
-local tostring = use "tostring"
-local collectgarbage = use "collectgarbage"
-
---// lua libs //--
-
-local os = use "os"
-local table = use "table"
-local string = use "string"
-local coroutine = use "coroutine"
-
---// lua lib methods //--
-
-local os_time = os.time
-local os_difftime = os.difftime
-local table_concat = table.concat
-local table_remove = table.remove
-local string_len = string.len
-local string_sub = string.sub
-local coroutine_wrap = coroutine.wrap
-local coroutine_yield = coroutine.yield
-
---// extern libs //--
-
-local luasec = select( 2, pcall( require, "ssl" ) )
-local luasocket = require "socket"
-
---// extern lib methods //--
-
-local ssl_wrap = ( luasec and luasec.wrap )
-local socket_bind = luasocket.bind
-local socket_sleep = luasocket.sleep
-local socket_select = luasocket.select
-local ssl_newcontext = ( luasec and luasec.newcontext )
-
---// functions //--
-
-local id
-local loop
-local stats
-local idfalse
-local addtimer
-local closeall
-local addserver
-local getserver
-local wrapserver
-local getsettings
-local closesocket
-local removesocket
-local removeserver
-local changetimeout
-local wrapconnection
-local changesettings
-
---// tables //--
-
-local _server
-local _readlist
-local _timerlist
-local _sendlist
-local _socketlist
-local _closelist
-local _readtimes
-local _writetimes
-
---// simple data types //--
-
-local _
-local _readlistlen
-local _sendlistlen
-local _timerlistlen
-
-local _sendtraffic
-local _readtraffic
-
-local _selecttimeout
-local _sleeptime
-
-local _starttime
-local _currenttime
-
-local _maxsendlen
-local _maxreadlen
-
-local _checkinterval
-local _sendtimeout
-local _readtimeout
-
-local _cleanqueue
-
-local _timer
-
-local _maxclientsperserver
-
-----------------------------------// DEFINITION //--
-
-_server = { } -- key = port, value = table; list of listening servers
-_readlist = { } -- array with sockets to read from
-_sendlist = { } -- arrary with sockets to write to
-_timerlist = { } -- array of timer functions
-_socketlist = { } -- key = socket, value = wrapped socket (handlers)
-_readtimes = { } -- key = handler, value = timestamp of last data reading
-_writetimes = { } -- key = handler, value = timestamp of last data writing/sending
-_closelist = { } -- handlers to close
-
-_readlistlen = 0 -- length of readlist
-_sendlistlen = 0 -- length of sendlist
-_timerlistlen = 0 -- lenght of timerlist
-
-_sendtraffic = 0 -- some stats
-_readtraffic = 0
-
-_selecttimeout = 1 -- timeout of socket.select
-_sleeptime = 0 -- time to wait at the end of every loop
-
-_maxsendlen = 51000 * 1024 -- max len of send buffer
-_maxreadlen = 25000 * 1024 -- max len of read buffer
-
-_checkinterval = 1200000 -- interval in secs to check idle clients
-_sendtimeout = 60000 -- allowed send idle time in secs
-_readtimeout = 6 * 60 * 60 -- allowed read idle time in secs
-
-_cleanqueue = false -- clean bufferqueue after using
-
-_maxclientsperserver = 1000
-
-_maxsslhandshake = 30 -- max handshake round-trips
-----------------------------------// PRIVATE //--
-
-wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, maxconnections, startssl ) -- this function wraps a server
-
- maxconnections = maxconnections or _maxclientsperserver
-
- local connections = 0
-
- local dispatch, disconnect = listeners.onincoming, listeners.ondisconnect
-
- local err
-
- local ssl = false
-
- if sslctx then
- ssl = true
- if not ssl_newcontext then
- out_error "luasec not found"
- ssl = false
- end
- if type( sslctx ) ~= "table" then
- out_error "server.lua: wrong server sslctx"
- ssl = false
- end
- local ctx;
- ctx, err = ssl_newcontext( sslctx )
- if not ctx then
- err = err or "wrong sslctx parameters"
- local file;
- file = err:match("^error loading (.-) %(");
- if file then
- if file == "private key" then
- file = sslctx.key or "your private key";
- elseif file == "certificate" then
- file = sslctx.certificate or "your certificate file";
- end
- local reason = err:match("%((.+)%)$") or "some reason";
- if reason == "Permission denied" then
- reason = "Check that the permissions allow Prosody to read this file.";
- elseif reason == "No such file or directory" then
- reason = "Check that the path is correct, and the file exists.";
- elseif reason == "system lib" then
- reason = "Previous error (see logs), or other system error.";
- else
- reason = "Reason: "..tostring(reason or "unknown"):lower();
- end
- log("error", "SSL/TLS: Failed to load %s: %s", file, reason);
- else
- log("error", "SSL/TLS: Error initialising for port %d: %s", serverport, err );
- end
- ssl = false
- end
- sslctx = ctx;
- end
- if not ssl then
- sslctx = false;
- if startssl then
- log("error", "Failed to listen on port %d due to SSL/TLS to SSL/TLS initialisation errors (see logs)", serverport )
- return nil, "Cannot start ssl, see log for details"
- end
- end
-
- local accept = socket.accept
-
- --// public methods of the object //--
-
- local handler = { }
-
- handler.shutdown = function( ) end
-
- handler.ssl = function( )
- return ssl
- end
- handler.sslctx = function( )
- return sslctx
- end
- handler.remove = function( )
- connections = connections - 1
- end
- handler.close = function( )
- for _, handler in pairs( _socketlist ) do
- if handler.serverport == serverport then
- handler.disconnect( handler, "server closed" )
- handler:close( true )
- end
- end
- socket:close( )
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
- _readlistlen = removesocket( _readlist, socket, _readlistlen )
- _socketlist[ socket ] = nil
- handler = nil
- socket = nil
- --mem_free( )
- out_put "server.lua: closed server handler and removed sockets from list"
- end
- handler.ip = function( )
- return ip
- end
- handler.serverport = function( )
- return serverport
- end
- handler.socket = function( )
- return socket
- end
- handler.readbuffer = function( )
- if connections > maxconnections then
- out_put( "server.lua: refused new client connection: server full" )
- return false
- end
- local client, err = accept( socket ) -- try to accept
- if client then
- local ip, clientport = client:getpeername( )
- client:settimeout( 0 )
- local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx, startssl ) -- wrap new client socket
- if err then -- error while wrapping ssl socket
- return false
- end
- connections = connections + 1
- out_put( "server.lua: accepted new client connection from ", tostring(ip), ":", tostring(clientport), " to ", tostring(serverport))
- return dispatch( handler )
- elseif err then -- maybe timeout or something else
- out_put( "server.lua: error with new client connection: ", tostring(err) )
- return false
- end
- end
- return handler
-end
-
-wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx, startssl ) -- this function wraps a client to a handler object
-
- socket:settimeout( 0 )
-
- --// local import of socket methods //--
-
- local send
- local receive
- local shutdown
-
- --// private closures of the object //--
-
- local ssl
-
- local dispatch = listeners.onincoming
- local status = listeners.status
- local disconnect = listeners.ondisconnect
-
- local bufferqueue = { } -- buffer array
- local bufferqueuelen = 0 -- end of buffer array
-
- local toclose
- local fatalerror
- local needtls
-
- local bufferlen = 0
-
- local noread = false
- local nosend = false
-
- local sendtraffic, readtraffic = 0, 0
-
- local maxsendlen = _maxsendlen
- local maxreadlen = _maxreadlen
-
- --// public methods of the object //--
-
- local handler = bufferqueue -- saves a table ^_^
-
- handler.dispatch = function( )
- return dispatch
- end
- handler.disconnect = function( )
- return disconnect
- end
- handler.setlistener = function( self, listeners )
- dispatch = listeners.onincoming
- disconnect = listeners.ondisconnect
- end
- handler.getstats = function( )
- return readtraffic, sendtraffic
- end
- handler.ssl = function( )
- return ssl
- end
- handler.sslctx = function ( )
- return sslctx
- end
- handler.send = function( _, data, i, j )
- return send( socket, data, i, j )
- end
- handler.receive = function( pattern, prefix )
- return receive( socket, pattern, prefix )
- end
- handler.shutdown = function( pattern )
- return shutdown( socket, pattern )
- end
- handler.close = function( self, forced )
- if not handler then return true; end
- _readlistlen = removesocket( _readlist, socket, _readlistlen )
- _readtimes[ handler ] = nil
- if bufferqueuelen ~= 0 then
- if not ( forced or fatalerror ) then
- handler.sendbuffer( )
- if bufferqueuelen ~= 0 then -- try again...
- if handler then
- handler.write = nil -- ... but no further writing allowed
- end
- toclose = true
- return false
- end
- else
- send( socket, table_concat( bufferqueue, "", 1, bufferqueuelen ), 1, bufferlen ) -- forced send
- end
- end
- if socket then
- _ = shutdown and shutdown( socket )
- socket:close( )
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
- _socketlist[ socket ] = nil
- socket = nil
- else
- out_put "server.lua: socket already closed"
- end
- if handler then
- _writetimes[ handler ] = nil
- _closelist[ handler ] = nil
- handler = nil
- end
- if server then
- server.remove( )
- end
- out_put "server.lua: closed client handler and removed socket from list"
- return true
- end
- handler.ip = function( )
- return ip
- end
- handler.serverport = function( )
- return serverport
- end
- handler.clientport = function( )
- return clientport
- end
- local write = function( self, data )
- bufferlen = bufferlen + string_len( data )
- if bufferlen > maxsendlen then
- _closelist[ handler ] = "send buffer exceeded" -- cannot close the client at the moment, have to wait to the end of the cycle
- handler.write = idfalse -- dont write anymore
- return false
- elseif socket and not _sendlist[ socket ] then
- _sendlistlen = addsocket(_sendlist, socket, _sendlistlen)
- end
- bufferqueuelen = bufferqueuelen + 1
- bufferqueue[ bufferqueuelen ] = data
- if handler then
- _writetimes[ handler ] = _writetimes[ handler ] or _currenttime
- end
- return true
- end
- handler.write = write
- handler.bufferqueue = function( self )
- return bufferqueue
- end
- handler.socket = function( self )
- return socket
- end
- handler.pattern = function( self, new )
- pattern = new or pattern
- return pattern
- end
- handler.set_send = function ( self, newsend )
- send = newsend or send
- return send
- end
- handler.bufferlen = function( self, readlen, sendlen )
- maxsendlen = sendlen or maxsendlen
- maxreadlen = readlen or maxreadlen
- return bufferlen, maxreadlen, maxsendlen
- end
- handler.lock_read = function (self, switch)
- if switch == true then
- local tmp = _readlistlen
- _readlistlen = removesocket( _readlist, socket, _readlistlen )
- _readtimes[ handler ] = nil
- if _readlistlen ~= tmp then
- noread = true
- end
- elseif switch == false then
- if noread then
- noread = false
- _readlistlen = addsocket(_readlist, socket, _readlistlen)
- _readtimes[ handler ] = _currenttime
- end
- end
- return noread
- end
- handler.lock = function( self, switch )
- handler.lock_read (switch)
- if switch == true then
- handler.write = idfalse
- local tmp = _sendlistlen
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
- _writetimes[ handler ] = nil
- if _sendlistlen ~= tmp then
- nosend = true
- end
- elseif switch == false then
- handler.write = write
- if nosend then
- nosend = false
- write( "" )
- end
- end
- return noread, nosend
- end
- local _readbuffer = function( ) -- this function reads data
- local buffer, err, part = receive( socket, pattern ) -- receive buffer with "pattern"
- if not err or (err == "wantread" or err == "timeout") or string_len(part) > 0 then -- received something
- local buffer = buffer or part or ""
- local len = string_len( buffer )
- if len > maxreadlen then
- disconnect( handler, "receive buffer exceeded" )
- handler.close( true )
- return false
- end
- local count = len * STAT_UNIT
- readtraffic = readtraffic + count
- _readtraffic = _readtraffic + count
- _readtimes[ handler ] = _currenttime
- --out_put( "server.lua: read data '", buffer:gsub("[^%w%p ]", "."), "', error: ", err )
- return dispatch( handler, buffer, err )
- else -- connections was closed or fatal error
- out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " read error: ", tostring(err) )
- fatalerror = true
- disconnect( handler, err )
- _ = handler and handler.close( )
- return false
- end
- end
- local _sendbuffer = function( ) -- this function sends data
- local succ, err, byte, buffer, count;
- local count;
- if socket then
- buffer = table_concat( bufferqueue, "", 1, bufferqueuelen )
- succ, err, byte = send( socket, buffer, 1, bufferlen )
- count = ( succ or byte or 0 ) * STAT_UNIT
- sendtraffic = sendtraffic + count
- _sendtraffic = _sendtraffic + count
- _ = _cleanqueue and clean( bufferqueue )
- --out_put( "server.lua: sended '", buffer, "', bytes: ", tostring(succ), ", error: ", tostring(err), ", part: ", tostring(byte), ", to: ", tostring(ip), ":", tostring(clientport) )
- else
- succ, err, count = false, "closed", 0;
- end
- if succ then -- sending succesful
- bufferqueuelen = 0
- bufferlen = 0
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) -- delete socket from writelist
- _ = needtls and handler:starttls(true)
- _writetimes[ handler ] = nil
- _ = toclose and handler.close( )
- return true
- elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write
- buffer = string_sub( buffer, byte + 1, bufferlen ) -- new buffer
- bufferqueue[ 1 ] = buffer -- insert new buffer in queue
- bufferqueuelen = 1
- bufferlen = bufferlen - byte
- _writetimes[ handler ] = _currenttime
- return true
- else -- connection was closed during sending or fatal error
- out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " write error: ", tostring(err) )
- fatalerror = true
- disconnect( handler, err )
- _ = handler and handler.close( )
- return false
- end
- end
-
- -- Set the sslctx
- local handshake;
- function handler.set_sslctx(self, new_sslctx)
- ssl = true
- sslctx = new_sslctx;
- local wrote
- local read
- handshake = coroutine_wrap( function( client ) -- create handshake coroutine
- local err
- for i = 1, _maxsslhandshake do
- _sendlistlen = ( wrote and removesocket( _sendlist, client, _sendlistlen ) ) or _sendlistlen
- _readlistlen = ( read and removesocket( _readlist, client, _readlistlen ) ) or _readlistlen
- read, wrote = nil, nil
- _, err = client:dohandshake( )
- if not err then
- out_put( "server.lua: ssl handshake done" )
- handler.readbuffer = _readbuffer -- when handshake is done, replace the handshake function with regular functions
- handler.sendbuffer = _sendbuffer
- _ = status and status( handler, "ssl-handshake-complete" )
- _readlistlen = addsocket(_readlist, client, _readlistlen)
- return true
- else
- out_put( "server.lua: error during ssl handshake: ", tostring(err) )
- if err == "wantwrite" and not wrote then
- _sendlistlen = addsocket(_sendlist, client, _sendlistlen)
- wrote = true
- elseif err == "wantread" and not read then
- _readlistlen = addsocket(_readlist, client, _readlistlen)
- read = true
- else
- break;
- end
- --coroutine_yield( handler, nil, err ) -- handshake not finished
- coroutine_yield( )
- end
- end
- disconnect( handler, "ssl handshake failed" )
- _ = handler and handler:close( true ) -- forced disconnect
- return false -- handshake failed
- end
- )
- end
- if sslctx then -- ssl?
- handler:set_sslctx(sslctx);
- if startssl then -- ssl now?
- --out_put("server.lua: ", "starting ssl handshake")
- local err
- socket, err = ssl_wrap( socket, sslctx ) -- wrap socket
- if err then
- out_put( "server.lua: ssl error: ", tostring(err) )
- --mem_free( )
- return nil, nil, err -- fatal error
- end
- socket:settimeout( 0 )
- handler.readbuffer = handshake
- handler.sendbuffer = handshake
- handshake( socket ) -- do handshake
- if not socket then
- return nil, nil, "ssl handshake failed";
- end
- else
- -- We're not automatically doing SSL, so we're not secure (yet)
- ssl = false
- handler.starttls = function( self, now )
- if not now then
- --out_put "server.lua: we need to do tls, but delaying until later"
- needtls = true
- return
- end
- --out_put( "server.lua: attempting to start tls on " .. tostring( socket ) )
- local oldsocket, err = socket
- socket, err = ssl_wrap( socket, sslctx ) -- wrap socket
- --out_put( "server.lua: sslwrapped socket is " .. tostring( socket ) )
- if err then
- out_put( "server.lua: error while starting tls on client: ", tostring(err) )
- return nil, err -- fatal error
- end
-
- socket:settimeout( 0 )
-
- -- add the new socket to our system
-
- send = socket.send
- receive = socket.receive
- shutdown = id
-
- _socketlist[ socket ] = handler
- _readlistlen = addsocket(_readlist, socket, _readlistlen)
-
- -- remove traces of the old socket
-
- _readlistlen = removesocket( _readlist, oldsocket, _readlistlen )
- _sendlistlen = removesocket( _sendlist, oldsocket, _sendlistlen )
- _socketlist[ oldsocket ] = nil
-
- handler.starttls = nil
- needtls = nil
-
- -- Secure now
- ssl = true
-
- handler.readbuffer = handshake
- handler.sendbuffer = handshake
- handshake( socket ) -- do handshake
- end
- handler.readbuffer = _readbuffer
- handler.sendbuffer = _sendbuffer
- end
- else -- normal connection
- ssl = false
- handler.readbuffer = _readbuffer
- handler.sendbuffer = _sendbuffer
- end
-
- send = socket.send
- receive = socket.receive
- shutdown = ( ssl and id ) or socket.shutdown
-
- _socketlist[ socket ] = handler
- _readlistlen = addsocket(_readlist, socket, _readlistlen)
-
- return handler, socket
-end
-
-id = function( )
-end
-
-idfalse = function( )
- return false
-end
-
-addsocket = function( list, socket, len )
- if not list[ socket ] then
- len = len + 1
- list[ len ] = socket
- list[ socket ] = len
- end
- return len;
-end
-
-removesocket = function( list, socket, len ) -- this function removes sockets from a list ( copied from copas )
- local pos = list[ socket ]
- if pos then
- list[ socket ] = nil
- local last = list[ len ]
- list[ len ] = nil
- if last ~= socket then
- list[ last ] = pos
- list[ pos ] = last
- end
- return len - 1
- end
- return len
-end
-
-closesocket = function( socket )
- _sendlistlen = removesocket( _sendlist, socket, _sendlistlen )
- _readlistlen = removesocket( _readlist, socket, _readlistlen )
- _socketlist[ socket ] = nil
- socket:close( )
- --mem_free( )
-end
-
-----------------------------------// PUBLIC //--
-
-addserver = function( addr, port, listeners, pattern, sslctx, startssl ) -- this function provides a way for other scripts to reg a server
- local err
- --out_put("server.lua: autossl on ", port, " is ", startssl)
- if type( listeners ) ~= "table" then
- err = "invalid listener table"
- end
- if not type( port ) == "number" or not ( port >= 0 and port <= 65535 ) then
- err = "invalid port"
- elseif _server[ port ] then
- err = "listeners on port '" .. port .. "' already exist"
- elseif sslctx and not luasec then
- err = "luasec not found"
- end
- if err then
- out_error( "server.lua, port ", port, ": ", err )
- return nil, err
- end
- addr = addr or "*"
- local server, err = socket_bind( addr, port )
- if err then
- out_error( "server.lua, port ", port, ": ", err )
- return nil, err
- end
- local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx, _maxclientsperserver, startssl ) -- wrap new server socket
- if not handler then
- server:close( )
- return nil, err
- end
- server:settimeout( 0 )
- _readlistlen = addsocket(_readlist, server, _readlistlen)
- _server[ port ] = handler
- _socketlist[ server ] = handler
- out_put( "server.lua: new server listener on '", addr, ":", port, "'" )
- return handler
-end
-
-getserver = function ( port )
- return _server[ port ];
-end
-
-removeserver = function( port )
- local handler = _server[ port ]
- if not handler then
- return nil, "no server found on port '" .. tostring( port ) .. "'"
- end
- handler:close( )
- _server[ port ] = nil
- return true
-end
-
-closeall = function( )
- for _, handler in pairs( _socketlist ) do
- handler:close( )
- _socketlist[ _ ] = nil
- end
- _readlistlen = 0
- _sendlistlen = 0
- _timerlistlen = 0
- _server = { }
- _readlist = { }
- _sendlist = { }
- _timerlist = { }
- _socketlist = { }
- --mem_free( )
-end
-
-getsettings = function( )
- return _selecttimeout, _sleeptime, _maxsendlen, _maxreadlen, _checkinterval, _sendtimeout, _readtimeout, _cleanqueue, _maxclientsperserver, _maxsslhandshake
-end
-
-changesettings = function( new )
- if type( new ) ~= "table" then
- return nil, "invalid settings table"
- end
- _selecttimeout = tonumber( new.timeout ) or _selecttimeout
- _sleeptime = tonumber( new.sleeptime ) or _sleeptime
- _maxsendlen = tonumber( new.maxsendlen ) or _maxsendlen
- _maxreadlen = tonumber( new.maxreadlen ) or _maxreadlen
- _checkinterval = tonumber( new.checkinterval ) or _checkinterval
- _sendtimeout = tonumber( new.sendtimeout ) or _sendtimeout
- _readtimeout = tonumber( new.readtimeout ) or _readtimeout
- _cleanqueue = new.cleanqueue
- _maxclientsperserver = new._maxclientsperserver or _maxclientsperserver
- _maxsslhandshake = new._maxsslhandshake or _maxsslhandshake
- return true
-end
-
-addtimer = function( listener )
- if type( listener ) ~= "function" then
- return nil, "invalid listener function"
- end
- _timerlistlen = _timerlistlen + 1
- _timerlist[ _timerlistlen ] = listener
- return true
-end
-
-stats = function( )
- return _readtraffic, _sendtraffic, _readlistlen, _sendlistlen, _timerlistlen
-end
-
-local dontstop = true; -- thinking about tomorrow, ...
-
-setquitting = function (quit)
- dontstop = not quit;
- return;
-end
-
-loop = function( ) -- this is the main loop of the program
- while dontstop do
- local read, write, err = socket_select( _readlist, _sendlist, _selecttimeout )
- for i, socket in ipairs( write ) do -- send data waiting in writequeues
- local handler = _socketlist[ socket ]
- if handler then
- handler.sendbuffer( )
- else
- closesocket( socket )
- out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen
- end
- end
- for i, socket in ipairs( read ) do -- receive data
- local handler = _socketlist[ socket ]
- if handler then
- handler.readbuffer( )
- else
- closesocket( socket )
- out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen
- end
- end
- for handler, err in pairs( _closelist ) do
- handler.disconnect( )( handler, err )
- handler:close( true ) -- forced disconnect
- end
- clean( _closelist )
- _currenttime = os_time( )
- if os_difftime( _currenttime - _timer ) >= 1 then
- for i = 1, _timerlistlen do
- _timerlist[ i ]( _currenttime ) -- fire timers
- end
- _timer = _currenttime
- end
- socket_sleep( _sleeptime ) -- wait some time
- --collectgarbage( )
- end
- return "quitting"
-end
-
---// EXPERIMENTAL //--
-
-local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx, startssl )
- local handler = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx, startssl )
- _socketlist[ socket ] = handler
- _sendlistlen = addsocket(_sendlist, socket, _sendlistlen)
- return handler, socket
-end
-
-local addclient = function( address, port, listeners, pattern, sslctx, startssl )
- local client, err = luasocket.tcp( )
- if err then
- return nil, err
- end
- client:settimeout( 0 )
- _, err = client:connect( address, port )
- if err then -- try again
- local handler = wrapclient( client, address, port, listeners )
- else
- wrapconnection( nil, listeners, client, address, port, "clientport", pattern, sslctx, startssl )
- end
-end
-
---// EXPERIMENTAL //--
-
-----------------------------------// BEGIN //--
-
-use "setmetatable" ( _socketlist, { __mode = "k" } )
-use "setmetatable" ( _readtimes, { __mode = "k" } )
-use "setmetatable" ( _writetimes, { __mode = "k" } )
-
-_timer = os_time( )
-_starttime = os_time( )
-
-addtimer( function( )
- local difftime = os_difftime( _currenttime - _starttime )
- if difftime > _checkinterval then
- _starttime = _currenttime
- for handler, timestamp in pairs( _writetimes ) do
- if os_difftime( _currenttime - timestamp ) > _sendtimeout then
- --_writetimes[ handler ] = nil
- handler.disconnect( )( handler, "send timeout" )
- handler:close( true ) -- forced disconnect
- end
- end
- for handler, timestamp in pairs( _readtimes ) do
- if os_difftime( _currenttime - timestamp ) > _readtimeout then
- --_readtimes[ handler ] = nil
- handler.disconnect( )( handler, "read timeout" )
- handler:close( ) -- forced disconnect?
- end
- end
- end
- end
-)
-
-----------------------------------// PUBLIC INTERFACE //--
-
-return {
-
- addclient = addclient,
- wrapclient = wrapclient,
-
- loop = loop,
- stats = stats,
- closeall = closeall,
- addtimer = addtimer,
- addserver = addserver,
- getserver = getserver,
- getsettings = getsettings,
- setquitting = setquitting,
- removeserver = removeserver,
- changesettings = changesettings,
-}
+-- +-- server.lua by blastbeat of the luadch project +-- Re-used here under the MIT/X Consortium License +-- +-- Modifications (C) 2008-2009 Matthew Wild, Waqas Hussain +-- + +-- // wrapping luadch stuff // -- + +local use = function( what ) + return _G[ what ] +end +local clean = function( tbl ) + for i, k in pairs( tbl ) do + tbl[ i ] = nil + end +end + +local log, table_concat = require ("util.logger").init("socket"), table.concat; +local out_put = function (...) return log("debug", table_concat{...}); end +local out_error = function (...) return log("warn", table_concat{...}); end +local mem_free = collectgarbage + +----------------------------------// DECLARATION //-- + +--// constants //-- + +local STAT_UNIT = 1 -- byte + +--// lua functions //-- + +local type = use "type" +local pairs = use "pairs" +local ipairs = use "ipairs" +local tostring = use "tostring" +local collectgarbage = use "collectgarbage" + +--// lua libs //-- + +local os = use "os" +local table = use "table" +local string = use "string" +local coroutine = use "coroutine" + +--// lua lib methods //-- + +local os_time = os.time +local os_difftime = os.difftime +local table_concat = table.concat +local table_remove = table.remove +local string_len = string.len +local string_sub = string.sub +local coroutine_wrap = coroutine.wrap +local coroutine_yield = coroutine.yield + +--// extern libs //-- + +local luasec = select( 2, pcall( require, "ssl" ) ) +local luasocket = require "socket" + +--// extern lib methods //-- + +local ssl_wrap = ( luasec and luasec.wrap ) +local socket_bind = luasocket.bind +local socket_sleep = luasocket.sleep +local socket_select = luasocket.select +local ssl_newcontext = ( luasec and luasec.newcontext ) + +--// functions //-- + +local id +local loop +local stats +local idfalse +local addtimer +local closeall +local addserver +local getserver +local wrapserver +local getsettings +local closesocket +local removesocket +local removeserver +local changetimeout +local wrapconnection +local changesettings + +--// tables //-- + +local _server +local _readlist +local _timerlist +local _sendlist +local _socketlist +local _closelist +local _readtimes +local _writetimes + +--// simple data types //-- + +local _ +local _readlistlen +local _sendlistlen +local _timerlistlen + +local _sendtraffic +local _readtraffic + +local _selecttimeout +local _sleeptime + +local _starttime +local _currenttime + +local _maxsendlen +local _maxreadlen + +local _checkinterval +local _sendtimeout +local _readtimeout + +local _cleanqueue + +local _timer + +local _maxclientsperserver + +----------------------------------// DEFINITION //-- + +_server = { } -- key = port, value = table; list of listening servers +_readlist = { } -- array with sockets to read from +_sendlist = { } -- arrary with sockets to write to +_timerlist = { } -- array of timer functions +_socketlist = { } -- key = socket, value = wrapped socket (handlers) +_readtimes = { } -- key = handler, value = timestamp of last data reading +_writetimes = { } -- key = handler, value = timestamp of last data writing/sending +_closelist = { } -- handlers to close + +_readlistlen = 0 -- length of readlist +_sendlistlen = 0 -- length of sendlist +_timerlistlen = 0 -- lenght of timerlist + +_sendtraffic = 0 -- some stats +_readtraffic = 0 + +_selecttimeout = 1 -- timeout of socket.select +_sleeptime = 0 -- time to wait at the end of every loop + +_maxsendlen = 51000 * 1024 -- max len of send buffer +_maxreadlen = 25000 * 1024 -- max len of read buffer + +_checkinterval = 1200000 -- interval in secs to check idle clients +_sendtimeout = 60000 -- allowed send idle time in secs +_readtimeout = 6 * 60 * 60 -- allowed read idle time in secs + +_cleanqueue = false -- clean bufferqueue after using + +_maxclientsperserver = 1000 + +_maxsslhandshake = 30 -- max handshake round-trips +----------------------------------// PRIVATE //-- + +wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, maxconnections, startssl ) -- this function wraps a server + + maxconnections = maxconnections or _maxclientsperserver + + local connections = 0 + + local dispatch, disconnect = listeners.onincoming, listeners.ondisconnect + + local err + + local ssl = false + + if sslctx then + ssl = true + if not ssl_newcontext then + out_error "luasec not found" + ssl = false + end + if type( sslctx ) ~= "table" then + out_error "server.lua: wrong server sslctx" + ssl = false + end + local ctx; + ctx, err = ssl_newcontext( sslctx ) + if not ctx then + err = err or "wrong sslctx parameters" + local file; + file = err:match("^error loading (.-) %("); + if file then + if file == "private key" then + file = sslctx.key or "your private key"; + elseif file == "certificate" then + file = sslctx.certificate or "your certificate file"; + end + local reason = err:match("%((.+)%)$") or "some reason"; + if reason == "Permission denied" then + reason = "Check that the permissions allow Prosody to read this file."; + elseif reason == "No such file or directory" then + reason = "Check that the path is correct, and the file exists."; + elseif reason == "system lib" then + reason = "Previous error (see logs), or other system error."; + else + reason = "Reason: "..tostring(reason or "unknown"):lower(); + end + log("error", "SSL/TLS: Failed to load %s: %s", file, reason); + else + log("error", "SSL/TLS: Error initialising for port %d: %s", serverport, err ); + end + ssl = false + end + sslctx = ctx; + end + if not ssl then + sslctx = false; + if startssl then + log("error", "Failed to listen on port %d due to SSL/TLS to SSL/TLS initialisation errors (see logs)", serverport ) + return nil, "Cannot start ssl, see log for details" + end + end + + local accept = socket.accept + + --// public methods of the object //-- + + local handler = { } + + handler.shutdown = function( ) end + + handler.ssl = function( ) + return ssl + end + handler.sslctx = function( ) + return sslctx + end + handler.remove = function( ) + connections = connections - 1 + end + handler.close = function( ) + for _, handler in pairs( _socketlist ) do + if handler.serverport == serverport then + handler.disconnect( handler, "server closed" ) + handler:close( true ) + end + end + socket:close( ) + _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) + _readlistlen = removesocket( _readlist, socket, _readlistlen ) + _socketlist[ socket ] = nil + handler = nil + socket = nil + --mem_free( ) + out_put "server.lua: closed server handler and removed sockets from list" + end + handler.ip = function( ) + return ip + end + handler.serverport = function( ) + return serverport + end + handler.socket = function( ) + return socket + end + handler.readbuffer = function( ) + if connections > maxconnections then + out_put( "server.lua: refused new client connection: server full" ) + return false + end + local client, err = accept( socket ) -- try to accept + if client then + local ip, clientport = client:getpeername( ) + client:settimeout( 0 ) + local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx, startssl ) -- wrap new client socket + if err then -- error while wrapping ssl socket + return false + end + connections = connections + 1 + out_put( "server.lua: accepted new client connection from ", tostring(ip), ":", tostring(clientport), " to ", tostring(serverport)) + return dispatch( handler ) + elseif err then -- maybe timeout or something else + out_put( "server.lua: error with new client connection: ", tostring(err) ) + return false + end + end + return handler +end + +wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx, startssl ) -- this function wraps a client to a handler object + + socket:settimeout( 0 ) + + --// local import of socket methods //-- + + local send + local receive + local shutdown + + --// private closures of the object //-- + + local ssl + + local dispatch = listeners.onincoming + local status = listeners.status + local disconnect = listeners.ondisconnect + + local bufferqueue = { } -- buffer array + local bufferqueuelen = 0 -- end of buffer array + + local toclose + local fatalerror + local needtls + + local bufferlen = 0 + + local noread = false + local nosend = false + + local sendtraffic, readtraffic = 0, 0 + + local maxsendlen = _maxsendlen + local maxreadlen = _maxreadlen + + --// public methods of the object //-- + + local handler = bufferqueue -- saves a table ^_^ + + handler.dispatch = function( ) + return dispatch + end + handler.disconnect = function( ) + return disconnect + end + handler.setlistener = function( self, listeners ) + dispatch = listeners.onincoming + disconnect = listeners.ondisconnect + end + handler.getstats = function( ) + return readtraffic, sendtraffic + end + handler.ssl = function( ) + return ssl + end + handler.sslctx = function ( ) + return sslctx + end + handler.send = function( _, data, i, j ) + return send( socket, data, i, j ) + end + handler.receive = function( pattern, prefix ) + return receive( socket, pattern, prefix ) + end + handler.shutdown = function( pattern ) + return shutdown( socket, pattern ) + end + handler.close = function( self, forced ) + if not handler then return true; end + _readlistlen = removesocket( _readlist, socket, _readlistlen ) + _readtimes[ handler ] = nil + if bufferqueuelen ~= 0 then + if not ( forced or fatalerror ) then + handler.sendbuffer( ) + if bufferqueuelen ~= 0 then -- try again... + if handler then + handler.write = nil -- ... but no further writing allowed + end + toclose = true + return false + end + else + send( socket, table_concat( bufferqueue, "", 1, bufferqueuelen ), 1, bufferlen ) -- forced send + end + end + if socket then + _ = shutdown and shutdown( socket ) + socket:close( ) + _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) + _socketlist[ socket ] = nil + socket = nil + else + out_put "server.lua: socket already closed" + end + if handler then + _writetimes[ handler ] = nil + _closelist[ handler ] = nil + handler = nil + end + if server then + server.remove( ) + end + out_put "server.lua: closed client handler and removed socket from list" + return true + end + handler.ip = function( ) + return ip + end + handler.serverport = function( ) + return serverport + end + handler.clientport = function( ) + return clientport + end + local write = function( self, data ) + bufferlen = bufferlen + string_len( data ) + if bufferlen > maxsendlen then + _closelist[ handler ] = "send buffer exceeded" -- cannot close the client at the moment, have to wait to the end of the cycle + handler.write = idfalse -- dont write anymore + return false + elseif socket and not _sendlist[ socket ] then + _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) + end + bufferqueuelen = bufferqueuelen + 1 + bufferqueue[ bufferqueuelen ] = data + if handler then + _writetimes[ handler ] = _writetimes[ handler ] or _currenttime + end + return true + end + handler.write = write + handler.bufferqueue = function( self ) + return bufferqueue + end + handler.socket = function( self ) + return socket + end + handler.pattern = function( self, new ) + pattern = new or pattern + return pattern + end + handler.set_send = function ( self, newsend ) + send = newsend or send + return send + end + handler.bufferlen = function( self, readlen, sendlen ) + maxsendlen = sendlen or maxsendlen + maxreadlen = readlen or maxreadlen + return bufferlen, maxreadlen, maxsendlen + end + handler.lock_read = function (self, switch) + if switch == true then + local tmp = _readlistlen + _readlistlen = removesocket( _readlist, socket, _readlistlen ) + _readtimes[ handler ] = nil + if _readlistlen ~= tmp then + noread = true + end + elseif switch == false then + if noread then + noread = false + _readlistlen = addsocket(_readlist, socket, _readlistlen) + _readtimes[ handler ] = _currenttime + end + end + return noread + end + handler.lock = function( self, switch ) + handler.lock_read (switch) + if switch == true then + handler.write = idfalse + local tmp = _sendlistlen + _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) + _writetimes[ handler ] = nil + if _sendlistlen ~= tmp then + nosend = true + end + elseif switch == false then + handler.write = write + if nosend then + nosend = false + write( "" ) + end + end + return noread, nosend + end + local _readbuffer = function( ) -- this function reads data + local buffer, err, part = receive( socket, pattern ) -- receive buffer with "pattern" + if not err or (err == "wantread" or err == "timeout") or string_len(part) > 0 then -- received something + local buffer = buffer or part or "" + local len = string_len( buffer ) + if len > maxreadlen then + disconnect( handler, "receive buffer exceeded" ) + handler.close( true ) + return false + end + local count = len * STAT_UNIT + readtraffic = readtraffic + count + _readtraffic = _readtraffic + count + _readtimes[ handler ] = _currenttime + --out_put( "server.lua: read data '", buffer:gsub("[^%w%p ]", "."), "', error: ", err ) + return dispatch( handler, buffer, err ) + else -- connections was closed or fatal error + out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " read error: ", tostring(err) ) + fatalerror = true + disconnect( handler, err ) + _ = handler and handler.close( ) + return false + end + end + local _sendbuffer = function( ) -- this function sends data + local succ, err, byte, buffer, count; + local count; + if socket then + buffer = table_concat( bufferqueue, "", 1, bufferqueuelen ) + succ, err, byte = send( socket, buffer, 1, bufferlen ) + count = ( succ or byte or 0 ) * STAT_UNIT + sendtraffic = sendtraffic + count + _sendtraffic = _sendtraffic + count + _ = _cleanqueue and clean( bufferqueue ) + --out_put( "server.lua: sended '", buffer, "', bytes: ", tostring(succ), ", error: ", tostring(err), ", part: ", tostring(byte), ", to: ", tostring(ip), ":", tostring(clientport) ) + else + succ, err, count = false, "closed", 0; + end + if succ then -- sending succesful + bufferqueuelen = 0 + bufferlen = 0 + _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) -- delete socket from writelist + _ = needtls and handler:starttls(true) + _writetimes[ handler ] = nil + _ = toclose and handler.close( ) + return true + elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write + buffer = string_sub( buffer, byte + 1, bufferlen ) -- new buffer + bufferqueue[ 1 ] = buffer -- insert new buffer in queue + bufferqueuelen = 1 + bufferlen = bufferlen - byte + _writetimes[ handler ] = _currenttime + return true + else -- connection was closed during sending or fatal error + out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " write error: ", tostring(err) ) + fatalerror = true + disconnect( handler, err ) + _ = handler and handler.close( ) + return false + end + end + + -- Set the sslctx + local handshake; + function handler.set_sslctx(self, new_sslctx) + ssl = true + sslctx = new_sslctx; + local wrote + local read + handshake = coroutine_wrap( function( client ) -- create handshake coroutine + local err + for i = 1, _maxsslhandshake do + _sendlistlen = ( wrote and removesocket( _sendlist, client, _sendlistlen ) ) or _sendlistlen + _readlistlen = ( read and removesocket( _readlist, client, _readlistlen ) ) or _readlistlen + read, wrote = nil, nil + _, err = client:dohandshake( ) + if not err then + out_put( "server.lua: ssl handshake done" ) + handler.readbuffer = _readbuffer -- when handshake is done, replace the handshake function with regular functions + handler.sendbuffer = _sendbuffer + _ = status and status( handler, "ssl-handshake-complete" ) + _readlistlen = addsocket(_readlist, client, _readlistlen) + return true + else + out_put( "server.lua: error during ssl handshake: ", tostring(err) ) + if err == "wantwrite" and not wrote then + _sendlistlen = addsocket(_sendlist, client, _sendlistlen) + wrote = true + elseif err == "wantread" and not read then + _readlistlen = addsocket(_readlist, client, _readlistlen) + read = true + else + break; + end + --coroutine_yield( handler, nil, err ) -- handshake not finished + coroutine_yield( ) + end + end + disconnect( handler, "ssl handshake failed" ) + _ = handler and handler:close( true ) -- forced disconnect + return false -- handshake failed + end + ) + end + if sslctx then -- ssl? + handler:set_sslctx(sslctx); + if startssl then -- ssl now? + --out_put("server.lua: ", "starting ssl handshake") + local err + socket, err = ssl_wrap( socket, sslctx ) -- wrap socket + if err then + out_put( "server.lua: ssl error: ", tostring(err) ) + --mem_free( ) + return nil, nil, err -- fatal error + end + socket:settimeout( 0 ) + handler.readbuffer = handshake + handler.sendbuffer = handshake + handshake( socket ) -- do handshake + if not socket then + return nil, nil, "ssl handshake failed"; + end + else + -- We're not automatically doing SSL, so we're not secure (yet) + ssl = false + handler.starttls = function( self, now ) + if not now then + --out_put "server.lua: we need to do tls, but delaying until later" + needtls = true + return + end + --out_put( "server.lua: attempting to start tls on " .. tostring( socket ) ) + local oldsocket, err = socket + socket, err = ssl_wrap( socket, sslctx ) -- wrap socket + --out_put( "server.lua: sslwrapped socket is " .. tostring( socket ) ) + if err then + out_put( "server.lua: error while starting tls on client: ", tostring(err) ) + return nil, err -- fatal error + end + + socket:settimeout( 0 ) + + -- add the new socket to our system + + send = socket.send + receive = socket.receive + shutdown = id + + _socketlist[ socket ] = handler + _readlistlen = addsocket(_readlist, socket, _readlistlen) + + -- remove traces of the old socket + + _readlistlen = removesocket( _readlist, oldsocket, _readlistlen ) + _sendlistlen = removesocket( _sendlist, oldsocket, _sendlistlen ) + _socketlist[ oldsocket ] = nil + + handler.starttls = nil + needtls = nil + + -- Secure now + ssl = true + + handler.readbuffer = handshake + handler.sendbuffer = handshake + handshake( socket ) -- do handshake + end + handler.readbuffer = _readbuffer + handler.sendbuffer = _sendbuffer + end + else -- normal connection + ssl = false + handler.readbuffer = _readbuffer + handler.sendbuffer = _sendbuffer + end + + send = socket.send + receive = socket.receive + shutdown = ( ssl and id ) or socket.shutdown + + _socketlist[ socket ] = handler + _readlistlen = addsocket(_readlist, socket, _readlistlen) + + return handler, socket +end + +id = function( ) +end + +idfalse = function( ) + return false +end + +addsocket = function( list, socket, len ) + if not list[ socket ] then + len = len + 1 + list[ len ] = socket + list[ socket ] = len + end + return len; +end + +removesocket = function( list, socket, len ) -- this function removes sockets from a list ( copied from copas ) + local pos = list[ socket ] + if pos then + list[ socket ] = nil + local last = list[ len ] + list[ len ] = nil + if last ~= socket then + list[ last ] = pos + list[ pos ] = last + end + return len - 1 + end + return len +end + +closesocket = function( socket ) + _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) + _readlistlen = removesocket( _readlist, socket, _readlistlen ) + _socketlist[ socket ] = nil + socket:close( ) + --mem_free( ) +end + +----------------------------------// PUBLIC //-- + +addserver = function( addr, port, listeners, pattern, sslctx, startssl ) -- this function provides a way for other scripts to reg a server + local err + --out_put("server.lua: autossl on ", port, " is ", startssl) + if type( listeners ) ~= "table" then + err = "invalid listener table" + end + if not type( port ) == "number" or not ( port >= 0 and port <= 65535 ) then + err = "invalid port" + elseif _server[ port ] then + err = "listeners on port '" .. port .. "' already exist" + elseif sslctx and not luasec then + err = "luasec not found" + end + if err then + out_error( "server.lua, port ", port, ": ", err ) + return nil, err + end + addr = addr or "*" + local server, err = socket_bind( addr, port ) + if err then + out_error( "server.lua, port ", port, ": ", err ) + return nil, err + end + local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx, _maxclientsperserver, startssl ) -- wrap new server socket + if not handler then + server:close( ) + return nil, err + end + server:settimeout( 0 ) + _readlistlen = addsocket(_readlist, server, _readlistlen) + _server[ port ] = handler + _socketlist[ server ] = handler + out_put( "server.lua: new server listener on '", addr, ":", port, "'" ) + return handler +end + +getserver = function ( port ) + return _server[ port ]; +end + +removeserver = function( port ) + local handler = _server[ port ] + if not handler then + return nil, "no server found on port '" .. tostring( port ) .. "'" + end + handler:close( ) + _server[ port ] = nil + return true +end + +closeall = function( ) + for _, handler in pairs( _socketlist ) do + handler:close( ) + _socketlist[ _ ] = nil + end + _readlistlen = 0 + _sendlistlen = 0 + _timerlistlen = 0 + _server = { } + _readlist = { } + _sendlist = { } + _timerlist = { } + _socketlist = { } + --mem_free( ) +end + +getsettings = function( ) + return _selecttimeout, _sleeptime, _maxsendlen, _maxreadlen, _checkinterval, _sendtimeout, _readtimeout, _cleanqueue, _maxclientsperserver, _maxsslhandshake +end + +changesettings = function( new ) + if type( new ) ~= "table" then + return nil, "invalid settings table" + end + _selecttimeout = tonumber( new.timeout ) or _selecttimeout + _sleeptime = tonumber( new.sleeptime ) or _sleeptime + _maxsendlen = tonumber( new.maxsendlen ) or _maxsendlen + _maxreadlen = tonumber( new.maxreadlen ) or _maxreadlen + _checkinterval = tonumber( new.checkinterval ) or _checkinterval + _sendtimeout = tonumber( new.sendtimeout ) or _sendtimeout + _readtimeout = tonumber( new.readtimeout ) or _readtimeout + _cleanqueue = new.cleanqueue + _maxclientsperserver = new._maxclientsperserver or _maxclientsperserver + _maxsslhandshake = new._maxsslhandshake or _maxsslhandshake + return true +end + +addtimer = function( listener ) + if type( listener ) ~= "function" then + return nil, "invalid listener function" + end + _timerlistlen = _timerlistlen + 1 + _timerlist[ _timerlistlen ] = listener + return true +end + +stats = function( ) + return _readtraffic, _sendtraffic, _readlistlen, _sendlistlen, _timerlistlen +end + +local dontstop = true; -- thinking about tomorrow, ... + +setquitting = function (quit) + dontstop = not quit; + return; +end + +loop = function( ) -- this is the main loop of the program + while dontstop do + local read, write, err = socket_select( _readlist, _sendlist, _selecttimeout ) + for i, socket in ipairs( write ) do -- send data waiting in writequeues + local handler = _socketlist[ socket ] + if handler then + handler.sendbuffer( ) + else + closesocket( socket ) + out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen + end + end + for i, socket in ipairs( read ) do -- receive data + local handler = _socketlist[ socket ] + if handler then + handler.readbuffer( ) + else + closesocket( socket ) + out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen + end + end + for handler, err in pairs( _closelist ) do + handler.disconnect( )( handler, err ) + handler:close( true ) -- forced disconnect + end + clean( _closelist ) + _currenttime = os_time( ) + if os_difftime( _currenttime - _timer ) >= 1 then + for i = 1, _timerlistlen do + _timerlist[ i ]( _currenttime ) -- fire timers + end + _timer = _currenttime + end + socket_sleep( _sleeptime ) -- wait some time + --collectgarbage( ) + end + return "quitting" +end + +--// EXPERIMENTAL //-- + +local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx, startssl ) + local handler = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx, startssl ) + _socketlist[ socket ] = handler + _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) + return handler, socket +end + +local addclient = function( address, port, listeners, pattern, sslctx, startssl ) + local client, err = luasocket.tcp( ) + if err then + return nil, err + end + client:settimeout( 0 ) + _, err = client:connect( address, port ) + if err then -- try again + local handler = wrapclient( client, address, port, listeners ) + else + wrapconnection( nil, listeners, client, address, port, "clientport", pattern, sslctx, startssl ) + end +end + +--// EXPERIMENTAL //-- + +----------------------------------// BEGIN //-- + +use "setmetatable" ( _socketlist, { __mode = "k" } ) +use "setmetatable" ( _readtimes, { __mode = "k" } ) +use "setmetatable" ( _writetimes, { __mode = "k" } ) + +_timer = os_time( ) +_starttime = os_time( ) + +addtimer( function( ) + local difftime = os_difftime( _currenttime - _starttime ) + if difftime > _checkinterval then + _starttime = _currenttime + for handler, timestamp in pairs( _writetimes ) do + if os_difftime( _currenttime - timestamp ) > _sendtimeout then + --_writetimes[ handler ] = nil + handler.disconnect( )( handler, "send timeout" ) + handler:close( true ) -- forced disconnect + end + end + for handler, timestamp in pairs( _readtimes ) do + if os_difftime( _currenttime - timestamp ) > _readtimeout then + --_readtimes[ handler ] = nil + handler.disconnect( )( handler, "read timeout" ) + handler:close( ) -- forced disconnect? + end + end + end + end +) + +----------------------------------// PUBLIC INTERFACE //-- + +return { + + addclient = addclient, + wrapclient = wrapclient, + + loop = loop, + stats = stats, + closeall = closeall, + addtimer = addtimer, + addserver = addserver, + getserver = getserver, + getsettings = getsettings, + setquitting = setquitting, + removeserver = removeserver, + changesettings = changesettings, +} |