diff options
Diffstat (limited to 'net/server_select.lua')
| -rw-r--r-- | net/server_select.lua | 149 |
1 files changed, 94 insertions, 55 deletions
diff --git a/net/server_select.lua b/net/server_select.lua index deb8fe48..eea850ce 100644 --- a/net/server_select.lua +++ b/net/server_select.lua @@ -68,6 +68,7 @@ local idfalse local closeall local addsocket local addserver +local listen local addtimer local getserver local wrapserver @@ -123,7 +124,7 @@ local _maxsslhandshake _server = { } -- key = port, value = table; list of listening servers _readlist = { } -- array with sockets to read from -_sendlist = { } -- arrary with sockets to write to +_sendlist = { } -- array 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 @@ -149,7 +150,7 @@ _checkinterval = 30 -- interval in secs to check idle clients _sendtimeout = 60000 -- allowed send idle time in secs _readtimeout = 14 * 60 -- allowed read idle time in secs -local is_windows = package.config:sub(1,1) == "\\" -- check the directory separator, to detemine whether this is Windows +local is_windows = package.config:sub(1,1) == "\\" -- check the directory separator, to determine whether this is Windows _maxfd = (is_windows and math.huge) or luasocket._SETSIZE or 1024 -- max fd number, limit to 1024 by default to prevent glibc buffer overflow, but not on Windows _maxselectlen = luasocket._SETSIZE or 1024 -- But this still applies on Windows @@ -157,7 +158,7 @@ _maxsslhandshake = 30 -- max handshake round-trips ----------------------------------// PRIVATE //-- -wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- this function wraps a server -- FIXME Make sure FD < _maxfd +wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, ssldirect ) -- this function wraps a server -- FIXME Make sure FD < _maxfd if socket:getfd() >= _maxfd then out_error("server.lua: Disallowed FD number: "..socket:getfd()) @@ -183,6 +184,7 @@ wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- t handler.sslctx = function( ) return sslctx end + handler.hosts = {} -- sni handler.remove = function( ) connections = connections - 1 if handler then @@ -244,13 +246,13 @@ wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- t local client, err = accept( socket ) -- try to accept if client then local ip, clientport = client:getpeername( ) - local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx ) -- wrap new client socket + local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx, ssldirect ) -- 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)) - if dispatch and not sslctx then -- SSL connections will notify onconnect when handshake completes + if dispatch and not ssldirect then -- SSL connections will notify onconnect when handshake completes return dispatch( handler ); end return; @@ -264,7 +266,7 @@ wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx ) -- t return handler end -wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx, extra ) -- this function wraps a client to a handler object +wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx, ssldirect, extra ) -- this function wraps a client to a handler object if socket:getfd() >= _maxfd then out_error("server.lua: Disallowed FD number: "..socket:getfd()) -- PROTIP: Switch to libevent @@ -287,9 +289,12 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport local ssl + local pending + local dispatch = listeners.onincoming local status = listeners.onstatus local disconnect = listeners.ondisconnect + local predrain = listeners.onpredrain local drain = listeners.ondrain local onreadtimeout = listeners.onreadtimeout; local detach = listeners.ondetach @@ -334,6 +339,7 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport dispatch = listeners.onincoming disconnect = listeners.ondisconnect status = listeners.onstatus + predrain = listeners.onpredrain drain = listeners.ondrain handler.onreadtimeout = listeners.onreadtimeout detach = listeners.ondetach @@ -341,6 +347,9 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport listeners.onattach(self, data) end end + handler._setpending = function( ) + pending = true + end handler.getstats = function( ) return readtraffic, sendtraffic end @@ -377,7 +386,7 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport _readlistlen = removesocket( _readlist, socket, _readlistlen ) _readtimes[ handler ] = nil if bufferqueuelen ~= 0 then - handler.sendbuffer() -- Try now to send any outstanding data + handler:sendbuffer() -- Try now to send any outstanding data if bufferqueuelen ~= 0 then -- Still not empty, so we'll try again later if handler then handler.write = nil -- ... but no further writing allowed @@ -429,9 +438,8 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport bufferlen = bufferlen + #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 -- don't write anymore return false - elseif socket and not _sendlist[ socket ] then + elseif not nosend and socket and not _sendlist[ socket ] then _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) end bufferqueuelen = bufferqueuelen + 1 @@ -461,49 +469,55 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport maxreadlen = readlen or maxreadlen return bufferlen, maxreadlen, maxsendlen end - --TODO: Deprecate handler.lock_read = function (self, switch) + out_error( "server.lua, lock_read() is deprecated, use pause() and resume()" ) if switch == true then - local tmp = _readlistlen - _readlistlen = removesocket( _readlist, socket, _readlistlen ) - _readtimes[ handler ] = nil - if _readlistlen ~= tmp then - noread = true - end + return self:pause() elseif switch == false then - if noread then - noread = false - _readlistlen = addsocket(_readlist, socket, _readlistlen) - _readtimes[ handler ] = _currenttime - end + return self:resume() end return noread end handler.pause = function (self) - return self:lock_read(true); + local tmp = _readlistlen + _readlistlen = removesocket( _readlist, socket, _readlistlen ) + _readtimes[ handler ] = nil + if _readlistlen ~= tmp then + noread = true + end + return noread; end handler.resume = function (self) - return self:lock_read(false); + if noread then + noread = false + _readlistlen = addsocket(_readlist, socket, _readlistlen) + _readtimes[ handler ] = _currenttime + end + return noread; end handler.lock = function( self, switch ) - handler.lock_read (switch) + out_error( "server.lua, lock() is deprecated" ) + handler.lock_read (self, 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 + handler.pause_writes (self) elseif switch == false then - handler.write = write - if nosend then - nosend = false - write( "" ) - end + handler.resume_writes (self) end return noread, nosend end + handler.pause_writes = function (self) + local tmp = _sendlistlen + _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) + _writetimes[ handler ] = nil + nosend = true + end + handler.resume_writes = function (self) + nosend = false + if bufferlen > 0 and socket then + _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) + end + 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") then -- received something @@ -518,6 +532,12 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport _readtraffic = _readtraffic + count _readtimes[ handler ] = _currenttime --out_put( "server.lua: read data '", buffer:gsub("[^%w%p ]", "."), "', error: ", err ) + if pending then -- connection established + pending = nil + if listeners.onconnect then + listeners.onconnect(handler) + end + end 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) ) @@ -528,6 +548,15 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport local _sendbuffer = function( ) -- this function sends data local succ, err, byte, buffer, count; if socket then + if pending then + pending = nil + if listeners.onconnect then + listeners.onconnect(handler); + end + end + if predrain then + predrain(handler); + end buffer = table_concat( bufferqueue, "", 1, bufferqueuelen ) succ, err, byte = send( socket, buffer, 1, bufferlen ) count = ( succ or byte or 0 ) * STAT_UNIT @@ -604,7 +633,7 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport coroutine_yield( ) -- handshake not finished end end - err = "ssl handshake error: " .. ( err or "handshake too long" ); + err = ( err or "handshake too long" ); out_put( "server.lua: ", err ); _ = handler and handler:force_close(err) return false, err -- handshake failed @@ -624,13 +653,18 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport out_put( "server.lua: attempting to start tls on " .. tostring( socket ) ) local oldsocket, err = socket socket, err = ssl_wrap( socket, sslctx ) -- wrap socket + if not socket then out_put( "server.lua: error while starting tls on client: ", tostring(err or "unknown error") ) return nil, err -- fatal error end - if socket.sni and self.servername then - socket:sni(self.servername); + if socket.sni then + if self.servername then + socket:sni(self.servername); + elseif self._server and type(self._server.hosts) == "table" and next(self._server.hosts) ~= nil then + socket:sni(self.server().hosts, true); + end end socket:settimeout( 0 ) @@ -668,7 +702,7 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport _socketlist[ socket ] = handler _readlistlen = addsocket(_readlist, socket, _readlistlen) - if sslctx and has_luasec then + if sslctx and ssldirect and has_luasec then out_put "server.lua: auto-starting ssl negotiation..." handler.autostart_ssl = true; local ok, err = handler:starttls(sslctx); @@ -723,7 +757,7 @@ local function link(sender, receiver, buffersize) local sender_locked; local _sendbuffer = receiver.sendbuffer; function receiver.sendbuffer() - _sendbuffer(); + _sendbuffer(receiver); if sender_locked and receiver.bufferlen() < buffersize then sender:lock_read(false); -- Unlock now sender_locked = nil; @@ -743,9 +777,13 @@ end ----------------------------------// PUBLIC //-- -addserver = function( addr, port, listeners, pattern, sslctx ) -- this function provides a way for other scripts to reg a server +listen = function ( addr, port, listeners, config ) addr = addr or "*" + config = config or {} local err + local sslctx = config.tls_ctx; + local ssldirect = config.tls_direct; + local pattern = config.read_size; if type( listeners ) ~= "table" then err = "invalid listener table" elseif type ( addr ) ~= "string" then @@ -766,7 +804,7 @@ addserver = function( addr, port, listeners, pattern, sslctx ) -- this function out_error( "server.lua, [", addr, "]:", port, ": ", err ) return nil, err end - local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx ) -- wrap new server socket + local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx, ssldirect ) -- wrap new server socket if not handler then server:close( ) return nil, err @@ -779,6 +817,14 @@ addserver = function( addr, port, listeners, pattern, sslctx ) -- this function return handler end +addserver = function( addr, port, listeners, pattern, sslctx ) -- this function provides a way for other scripts to reg a server + return listen(addr, port, listeners, { + read_size = pattern; + tls_ctx = sslctx; + tls_direct = sslctx and true or false; + }); +end + getserver = function ( addr, port ) return _server[ addr..":"..port ]; end @@ -921,7 +967,7 @@ loop = function(once) -- this is the main loop of the program for _, socket in ipairs( read ) do -- receive data local handler = _socketlist[ socket ] if handler then - handler.readbuffer( ) + handler:readbuffer( ) else closesocket( socket ) out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen @@ -930,7 +976,7 @@ loop = function(once) -- this is the main loop of the program for _, socket in ipairs( write ) do -- send data waiting in writequeues local handler = _socketlist[ socket ] if handler then - handler.sendbuffer( ) + handler:sendbuffer( ) else closesocket( socket ) out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen @@ -987,21 +1033,13 @@ end --// EXPERIMENTAL //-- local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx, extra ) - local handler, socket, err = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx, extra) + local handler, socket, err = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx, sslctx, extra) if not handler then return nil, err end _socketlist[ socket ] = handler if not sslctx then + handler._setpending() _readlistlen = addsocket(_readlist, socket, _readlistlen) _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) - if listeners.onconnect then - -- When socket is writeable, call onconnect - local _sendbuffer = handler.sendbuffer; - handler.sendbuffer = function () - handler.sendbuffer = _sendbuffer; - listeners.onconnect(handler); - return _sendbuffer(); -- Send any queued outgoing data - end - end end return handler, socket end @@ -1123,6 +1161,7 @@ return { stats = stats, closeall = closeall, addserver = addserver, + listen = listen, getserver = getserver, setlogger = setlogger, getsettings = getsettings, |