/usr/lib/prosody/net/server_event.lua is in prosody 0.9.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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
-- 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_ATTEMPTS= 1000, -- attempts to finish ssl handshake
HANDSHAKE_TIMEOUT = 60, -- timeout in seconds per handshake attempt
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_QUEUE = 128, -- might influence the length of the pending sockets queue
ACCEPT_DELAY = 10, -- seconds to wait until the next attempt of a full server to accept
READ_TIMEOUT = 60 * 60 * 6, -- timeout in seconds for read data from socket
WRITE_TIMEOUT = 180, -- timeout in seconds for write data on socket
CONNECT_TIMEOUT = 20, -- timeout in seconds for connection attempts
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 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 t_insert = table.insert
local t_concat = table.concat
local ssl = use "ssl"
local socket = use "socket" or require "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_SIGNAL = event.EV_SIGNAL
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
-- Private methods
function interface_mt:_position(new_position)
self.position = new_position or self.position
return self.position;
end
function interface_mt:_close()
return self:_destroy();
end
function interface_mt:_start_connection(plainssl) -- should be called from addclient
local callback = function( event )
if EV_TIMEOUT == event then -- timeout 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 and ssl then -- start ssl session
self:starttls(self._sslctx, true)
else -- normal connection
self:_start_session(true)
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(call_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
if call_onconnect then
self:onconnect()
end
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(call_onconnect) -- 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 call_onconnect 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_ATTEMPTS
while attempt < maxattempt do -- no endless loop
attempt = attempt + 1
debug( "ssl handshake of client with id:"..tostring(self)..", attempt:"..attempt )
if attempt > maxattempt then
self.fatalerror = "max handshake attempts 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
if not call_onconnect then -- trigger listener
self:onstatus("ssl-handshake-complete");
end
self:_start_session( call_onconnect )
debug( "ssl handshake done" )
self.eventhandshake = nil
return -1
end
if err == "wantwrite" then
event = EV_WRITE
elseif err == "wantread" then
event = EV_READ
else
debug( "ssl handshake error:", err )
self.fatalerror = err
end
end
if self.fatalerror then
if call_onconnect 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.fatalerror )
self:_lock( true, true, true ) -- first of all, lock the interface to avoid further actions
local _
_ = self.eventread and self.eventread:close( )
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 ~= "client to close" and self.fatalerror) -- call ondisconnect listener (wont be the case if handshake failed on connect)
_ = self.conn and self.conn:close( ) -- close connection
_ = 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
--TODO: Deprecate
function interface_mt:lock_read(switch)
if switch then
return self:pause();
else
return self:resume();
end
end
function interface_mt:pause()
return self:_lock(self.nointerface, true, self.nowriting);
end
function interface_mt:resume()
self:_lock(self.nointerface, false, self.nowriting);
if not self.eventread then
self.eventread = addevent( base, self.conn, EV_READ, self.readcallback, cfg.READ_TIMEOUT ); -- register callback
end
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 = #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
t_insert(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()
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 self.eventwrite then -- wait for incomplete write request
self:_lock( true, true, false )
debug "closing delayed until writebuffer is empty"
return nil, "writebuffer not empty, waiting"
else -- close now
self:_lock( true, true, true )
self:_close()
return true
end
else
debug( "try to close server with id:", tostring(self.id))
self.fatalerror = "server to close"
self:_lock( true )
self:_close( 0 )
return true
end
end
function interface_mt:socket()
return self.conn
end
function interface_mt:server()
return self._server or self;
end
function interface_mt:port()
return self._port
end
function interface_mt:serverport()
return self._serverport
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_mode(pattern)
if pattern then
self._pattern = pattern;
end
return self._pattern;
end
function interface_mt:set_send(new_send)
-- No-op, we always use the underlying connection's send
end
function interface_mt:starttls(sslctx, call_onconnect)
debug( "try to start ssl at client id:", self.id )
local err
self._sslctx = sslctx;
if 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(call_onconnect);
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
self.starttls = false;
return true
end
function interface_mt:setoption(option, value)
if self.conn.setoption then
return self.conn:setoption(option, value);
end
return false, "setoption not implemented";
end
function interface_mt:setlistener(listener)
self.onconnect, self.ondisconnect, self.onincoming, self.ontimeout, self.onstatus
= listener.onconnect, listener.ondisconnect, listener.onincoming, listener.ontimeout, listener.onstatus;
end
-- Stub handlers
function interface_mt:onconnect()
end
function interface_mt:onincoming()
end
function interface_mt:ondisconnect()
end
function interface_mt:ontimeout()
end
function interface_mt:ondrain()
end
function interface_mt:onstatus()
end
end
-- End of client interface methods
local handleclient;
do
local string_sub = string.sub -- caching table lookups
local addevent = base.addevent
local socket_gettime = socket.gettime
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
ondrain = listener.ondrain; -- called when writebuffer is empty
onstatus = listener.onstatus; -- called for status changes (e.g. of SSL/TLS)
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,
_serverport = (server and server:port() or nil),
_sslctx = sslctx; -- parameters
_usingssl = false; -- client is using ssl;
}
if not ssl then interface.starttls = false; 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
interface.writebuffer = { t_concat(interface.writebuffer) }
local succ, err, byte = interface.conn:send( interface.writebuffer[1], 1, interface.writebufferlen )
--vdebug( "write data:", interface.writebuffer, "error:", err, "part:", byte )
if succ then -- writing succesful
interface.writebuffer[1] = nil
interface.writebufferlen = 0
interface:ondrain();
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 and (err == "timeout" or err == "wantwrite") then -- want write again
--vdebug( "writebuffer is not empty:", err )
interface.writebuffer[1] = string_sub( interface.writebuffer[1], 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 -1;
end
interface.eventwritetimeout = addevent( base, nil, EV_TIMEOUT, callback, cfg.WRITE_TIMEOUT ) -- reg a new timeout event
debug( "wantread during write attempt, 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( interface._pattern ) -- receive buffer with "pattern"
--vdebug( "read data:", tostring(buffer), "error:", tostring(err), "part:", tostring(part) )
buffer = buffer or part
if buffer and #buffer > 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
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 attempt, 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
else
interface.onincoming( interface, buffer, err ) -- send new data to listener
end
if interface.noreading then
interface.eventread = nil;
return -1;
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 ) -- 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
_ip = addr, _port = port, _pattern = pattern,
_sslctx = sslctx;
}
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 attempt
end
local client_ip, client_port = client:getpeername( )
interface._connections = interface._connections + 1 -- increase connection count
local clientinterface = handleclient( client, client_ip, client_port, interface, pattern, listener, sslctx )
--vdebug( "client id:", clientinterface, "startssl:", startssl )
if ssl and sslctx then
clientinterface:starttls(sslctx, true)
else
clientinterface:_start_session( true )
end
debug( "accepted incoming client connection from:", client_ip or "<unknown IP>", client_port or "<unknown port>", "to", port or "<unknown 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 on "..addr.." port "..port.." failed:", 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 = 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 )
local interface = handleclient( client, ip, port, nil, pattern, listeners, sslctx )
interface:_start_connection(sslctx)
return interface, client
--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 = 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 interface = wrapclient( client, ip, serverport, listener, 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
base:loop( )
return "quitting";
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
local function setquitting(yes)
if yes then
-- Quit now
closeallservers();
base:loopexit();
end
end
local function get_backend()
return base:method();
end
-- We need to hold onto the events to stop them
-- being garbage-collected
local signal_events = {}; -- [signal_num] -> event object
local function hook_signal(signal_num, handler)
local function _handler(event)
local ret = handler();
if ret ~= false then -- Continue handling this signal?
return EV_SIGNAL; -- Yes
end
return -1; -- Close this event
end
signal_events[signal_num] = base:addevent(signal_num, EV_SIGNAL, _handler);
return signal_events[signal_num];
end
local function link(sender, receiver, buffersize)
local sender_locked;
function receiver:ondrain()
if sender_locked then
sender:resume();
sender_locked = nil;
end
end
function sender:onincoming(data)
receiver:write(data);
if receiver.writebufferlen >= buffersize then
sender_locked = true;
sender:pause();
end
end
end
return {
cfg = cfg,
base = base,
loop = loop,
link = link,
event = event,
event_base = base,
addevent = newevent,
addserver = addserver,
addclient = addclient,
wrapclient = wrapclient,
setquitting = setquitting,
closeall = closeallservers,
get_backend = get_backend,
hook_signal = hook_signal,
__NAME = SCRIPT_NAME,
__DATE = LAST_MODIFIED,
__AUTHOR = SCRIPT_AUTHOR,
__VERSION = SCRIPT_VERSION,
}
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