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-rw-r--r--net/adns.lua6
-rw-r--r--net/dns.lua25
-rw-r--r--net/http.lua30
-rw-r--r--net/http/server.lua27
-rw-r--r--net/server.lua2
-rw-r--r--net/server_event.lua160
-rw-r--r--net/server_select.lua28
-rw-r--r--net/websocket.lua269
-rw-r--r--net/websocket/frames.lua195
9 files changed, 613 insertions, 129 deletions
diff --git a/net/adns.lua b/net/adns.lua
index 2a3fa8ad..15814fe7 100644
--- a/net/adns.lua
+++ b/net/adns.lua
@@ -1,7 +1,7 @@
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
---
+--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
@@ -65,7 +65,7 @@ function new_async_socket(sock, resolver)
if resolver.socketset[conn] == resolver.best_server and resolver.best_server == #servers then
log("error", "Exhausted all %d configured DNS servers, next lookup will try %s again", #servers, servers[1]);
end
-
+
resolver:servfail(conn); -- Let the magic commence
end
end
@@ -73,7 +73,7 @@ function new_async_socket(sock, resolver)
if not handler then
return nil, err;
end
-
+
handler.settimeout = function () end
handler.setsockname = function (_, ...) return sock:setsockname(...); end
handler.setpeername = function (_, ...) peername = (...); local ret = sock:setpeername(...); _:set_send(dummy_send); return ret; end
diff --git a/net/dns.lua b/net/dns.lua
index 89bd3564..42bbdb01 100644
--- a/net/dns.lua
+++ b/net/dns.lua
@@ -14,6 +14,7 @@
local socket = require "socket";
local timer = require "util.timer";
+local new_ip = require "util.ip".new_ip;
local _, windows = pcall(require, "util.windows");
local is_windows = (_ and windows) or os.getenv("WINDIR");
@@ -597,11 +598,12 @@ function resolver:adddefaultnameservers() -- - - - - adddefaultnameservers
if resolv_conf then
for line in resolv_conf:lines() do
line = line:gsub("#.*$", "")
- :match('^%s*nameserver%s+(.*)%s*$');
+ :match('^%s*nameserver%s+([%x:%.]*)%s*$');
if line then
- line:gsub("%f[%d.](%d+%.%d+%.%d+%.%d+)%f[^%d.]", function (address)
- self:addnameserver(address)
- end);
+ local ip = new_ip(line);
+ if ip then
+ self:addnameserver(ip.addr);
+ end
end
end
end
@@ -621,7 +623,12 @@ function resolver:getsocket(servernum) -- - - - - - - - - - - - - getsocket
if sock then return sock; end
local err;
- sock, err = socket.udp();
+ local peer = self.server[servernum];
+ if peer:find(":") then
+ sock, err = socket.udp6();
+ else
+ sock, err = socket.udp();
+ end
if sock and self.socket_wrapper then sock, err = self.socket_wrapper(sock, self); end
if not sock then
return nil, err;
@@ -629,7 +636,7 @@ function resolver:getsocket(servernum) -- - - - - - - - - - - - - getsocket
sock:settimeout(0);
-- todo: attempt to use a random port, fallback to 0
sock:setsockname('*', 0);
- sock:setpeername(self.server[servernum], 53);
+ sock:setpeername(peer, 53);
self.socket[servernum] = sock;
self.socketset[sock] = servernum;
return sock;
@@ -752,7 +759,7 @@ function resolver:query(qname, qtype, qclass) -- - - - - - - - - - -- query
return nil, err;
end
conn:send (o.packet)
-
+
if timer and self.timeout then
local num_servers = #self.server;
local i = 1;
@@ -848,7 +855,7 @@ function resolver:receive(rset) -- - - - - - - - - - - - - - - - - receive
-- retire the query
local queries = self.active[response.header.id];
queries[response.question.raw] = nil;
-
+
if not next(queries) then self.active[response.header.id] = nil; end
if not next(self.active) then self:closeall(); end
@@ -862,7 +869,7 @@ function resolver:receive(rset) -- - - - - - - - - - - - - - - - - receive
set(self.wanted, q.class, q.type, q.name, nil);
end
end
-
+
end
end
end
diff --git a/net/http.lua b/net/http.lua
index 9dde6062..0c0ef967 100644
--- a/net/http.lua
+++ b/net/http.lua
@@ -1,7 +1,7 @@
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
---
+--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
@@ -37,7 +37,7 @@ function listener.onconnect(conn)
if req.query then
t_insert(request_line, 4, "?"..req.query);
end
-
+
conn:write(t_concat(request_line));
local t = { [2] = ": ", [4] = "\r\n" };
for k, v in pairs(req.headers) do
@@ -45,7 +45,7 @@ function listener.onconnect(conn)
conn:write(t_concat(t));
end
conn:write("\r\n");
-
+
if req.body then
conn:write(req.body);
end
@@ -85,12 +85,12 @@ local function request_reader(request, data, err)
end
destroy_request(request);
end
-
+
if not data then
error_cb(err);
return;
end
-
+
local function success_cb(r)
if request.callback then
request.callback(r.body, r.code, r, request);
@@ -109,18 +109,18 @@ end
local function handleerr(err) log("error", "Traceback[http]: %s", traceback(tostring(err), 2)); end
function request(u, ex, callback)
local req = url.parse(u);
-
+
if not (req and req.host) then
callback(nil, 0, req);
return nil, "invalid-url";
end
-
+
if not req.path then
req.path = "/";
end
-
+
local method, headers, body;
-
+
local host, port = req.host, req.port;
local host_header = host;
if (port == "80" and req.scheme == "http")
@@ -134,7 +134,7 @@ function request(u, ex, callback)
["Host"] = host_header;
["User-Agent"] = "Prosody XMPP Server";
};
-
+
if req.userinfo then
headers["Authorization"] = "Basic "..b64(req.userinfo);
end
@@ -154,16 +154,16 @@ function request(u, ex, callback)
end
end
end
-
+
-- Attach to request object
req.method, req.headers, req.body = method, headers, body;
-
+
local using_https = req.scheme == "https";
if using_https and not ssl_available then
error("SSL not available, unable to contact https URL");
end
local port_number = port and tonumber(port) or (using_https and 443 or 80);
-
+
-- Connect the socket, and wrap it with net.server
local conn = socket.tcp();
conn:settimeout(10);
@@ -172,7 +172,7 @@ function request(u, ex, callback)
callback(nil, 0, req);
return nil, err;
end
-
+
local sslctx = false;
if using_https then
sslctx = ex and ex.sslctx or { mode = "client", protocol = "sslv23", options = { "no_sslv2" } };
@@ -180,7 +180,7 @@ function request(u, ex, callback)
req.handler, req.conn = assert(server.wrapclient(conn, host, port_number, listener, "*a", sslctx));
req.write = function (...) return req.handler:write(...); end
-
+
req.callback = function (content, code, request, response) log("debug", "Calling callback, status %s", code or "---"); return select(2, xpcall(function () return callback(content, code, request, response) end, handleerr)); end
req.reader = request_reader;
req.state = "status";
diff --git a/net/http/server.lua b/net/http/server.lua
index 7937f87c..be870c51 100644
--- a/net/http/server.lua
+++ b/net/http/server.lua
@@ -189,6 +189,7 @@ function handle_request(conn, request, finish_cb)
persistent = persistent;
conn = conn;
send = _M.send_response;
+ done = _M.finish_response;
finish_cb = finish_cb;
};
conn._http_open_response = response;
@@ -208,7 +209,7 @@ function handle_request(conn, request, finish_cb)
err_code, err = 400, "Missing or invalid 'Host' header";
end
end
-
+
if err then
response.status_code = err_code;
response:send(events.fire_event("http-error", { code = err_code, message = err }));
@@ -250,24 +251,30 @@ function handle_request(conn, request, finish_cb)
response.status_code = 404;
response:send(events.fire_event("http-error", { code = 404 }));
end
-function _M.send_response(response, body)
- if response.finished then return; end
- response.finished = true;
- response.conn._http_open_response = nil;
-
+local function prepare_header(response)
local status_line = "HTTP/"..response.request.httpversion.." "..(response.status or codes[response.status_code]);
local headers = response.headers;
- body = body or response.body or "";
- headers.content_length = #body;
-
local output = { status_line };
for k,v in pairs(headers) do
t_insert(output, headerfix[k]..v);
end
t_insert(output, "\r\n\r\n");
+ return output;
+end
+_M.prepare_header = prepare_header;
+function _M.send_response(response, body)
+ if response.finished then return; end
+ body = body or response.body or "";
+ response.headers.content_length = #body;
+ local output = prepare_header(response);
t_insert(output, body);
-
response.conn:write(t_concat(output));
+ response:done();
+end
+function _M.finish_response(response)
+ if response.finished then return; end
+ response.finished = true;
+ response.conn._http_open_response = nil;
if response.on_destroy then
response:on_destroy();
response.on_destroy = nil;
diff --git a/net/server.lua b/net/server.lua
index 375e7081..2a0b89ae 100644
--- a/net/server.lua
+++ b/net/server.lua
@@ -1,7 +1,7 @@
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
---
+--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
diff --git a/net/server_event.lua b/net/server_event.lua
index 45938a13..756e9837 100644
--- a/net/server_event.lua
+++ b/net/server_event.lua
@@ -115,10 +115,10 @@ end )( )
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
@@ -127,7 +127,7 @@ do
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
@@ -268,12 +268,12 @@ do
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
@@ -300,7 +300,7 @@ do
end
return self._connections
end
-
+
-- Public methods
function interface_mt:write(data)
if self.nowriting then return nil, "locked" end
@@ -343,27 +343,27 @@ do
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
@@ -372,15 +372,15 @@ do
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
@@ -396,11 +396,11 @@ do
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
@@ -429,22 +429,22 @@ do
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:ondetach(); -- Notify listener that it is no longer responsible for this connection
- self.onconnect, self.ondisconnect, self.onincoming,
- self.ontimeout, self.onstatus, self.ondetach
- = listener.onconnect, listener.ondisconnect, listener.onincoming,
- listener.ontimeout, listener.onstatus, listener.ondetach;
+ self.onconnect, self.ondisconnect, self.onincoming, self.ontimeout,
+ self.onreadtimeout, self.onstatus, self.ondetach
+ = listener.onconnect, listener.ondisconnect, listener.onincoming, listener.ontimeout,
+ listener.onreadtimeout, listener.onstatus, listener.ondetach;
end
-
+
-- Stub handlers
function interface_mt:onconnect()
end
@@ -454,6 +454,12 @@ do
end
function interface_mt:ontimeout()
end
+ function interface_mt:onreadtimeout()
+ self.fatalerror = "timeout during receiving"
+ debug( "connection failed:", self.fatalerror )
+ self:_close()
+ self.eventread = nil
+ end
function interface_mt:ondrain()
end
function interface_mt:ondetach()
@@ -483,6 +489,7 @@ do
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
+ onreadtimeout = listener.onreadtimeout; -- called when socket inactivity timeout occurs
ondrain = listener.ondrain; -- called when writebuffer is empty
ondetach = listener.ondetach; -- called when disassociating this listener from this connection
onstatus = listener.onstatus; -- called for status changes (e.g. of SSL/TLS)
@@ -498,7 +505,7 @@ do
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),
@@ -574,7 +581,7 @@ do
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
@@ -582,61 +589,56 @@ do
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 )
+ if EV_TIMEOUT == event and interface:onreadtimeout() ~= true then
+ return -1 -- took too long to get some data from client -> disconnect
+ end
+ 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
- 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
+ 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
- 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.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
- 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
+ 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
client:settimeout( 0 ) -- set non blocking
@@ -652,7 +654,7 @@ do
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
@@ -660,7 +662,7 @@ do
readcallback = false; -- read event callback
fatalerror = false; -- error message
nointerface = true; -- lock/unlock parameter
-
+
_ip = addr, _port = port, _pattern = pattern,
_sslctx = sslctx;
}
@@ -699,12 +701,12 @@ do
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 )
@@ -747,7 +749,7 @@ do
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
@@ -838,14 +840,14 @@ 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
diff --git a/net/server_select.lua b/net/server_select.lua
index 7ac41523..d2192f0a 100644
--- a/net/server_select.lua
+++ b/net/server_select.lua
@@ -1,7 +1,7 @@
---
+--
-- server.lua by blastbeat of the luadch project
-- Re-used here under the MIT/X Consortium License
---
+--
-- Modifications (C) 2008-2010 Matthew Wild, Waqas Hussain
--
@@ -145,7 +145,7 @@ _tcpbacklog = 128 -- some kind of hint to the OS
_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
+_checkinterval = 30 -- 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
@@ -284,6 +284,7 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport
local status = listeners.onstatus
local disconnect = listeners.ondisconnect
local drain = listeners.ondrain
+ local onreadtimeout = listeners.onreadtimeout;
local detach = listeners.ondetach
local bufferqueue = { } -- buffer array
@@ -313,6 +314,8 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport
handler.disconnect = function( )
return disconnect
end
+ handler.onreadtimeout = onreadtimeout;
+
handler.setlistener = function( self, listeners )
if detach then
detach(self) -- Notify listener that it is no longer responsible for this connection
@@ -321,6 +324,7 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport
disconnect = listeners.ondisconnect
status = listeners.onstatus
drain = listeners.ondrain
+ handler.onreadtimeout = listeners.onreadtimeout
detach = listeners.ondetach
end
handler.getstats = function( )
@@ -613,7 +617,7 @@ wrapconnection = function( server, listeners, socket, ip, serverport, clientport
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 )
@@ -701,7 +705,7 @@ local function link(sender, receiver, buffersize)
sender_locked = nil;
end
end
-
+
local _readbuffer = sender.readbuffer;
function sender.readbuffer()
_readbuffer();
@@ -870,16 +874,16 @@ loop = function(once) -- this is the main loop of the program
_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:force_close() -- 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?
+ if not(handler.onreadtimeout) or handler:onreadtimeout() ~= true then
+ handler.disconnect( )( handler, "read timeout" )
+ handler:close( ) -- forced disconnect?
+ end
end
end
end
@@ -940,9 +944,9 @@ local addclient = function( address, port, listeners, pattern, sslctx )
client:settimeout( 0 )
_, err = client:connect( address, port )
if err then -- try again
- local handler = wrapclient( client, address, port, listeners )
+ return wrapclient( client, address, port, listeners, pattern, sslctx )
else
- wrapconnection( nil, listeners, client, address, port, "clientport", pattern, sslctx )
+ return wrapconnection( nil, listeners, client, address, port, "clientport", pattern, sslctx )
end
end
@@ -972,7 +976,7 @@ return {
addclient = addclient,
wrapclient = wrapclient,
-
+
loop = loop,
link = link,
step = step,
diff --git a/net/websocket.lua b/net/websocket.lua
new file mode 100644
index 00000000..3c4746b7
--- /dev/null
+++ b/net/websocket.lua
@@ -0,0 +1,269 @@
+-- Prosody IM
+-- Copyright (C) 2012 Florian Zeitz
+-- Copyright (C) 2014 Daurnimator
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+local t_concat = table.concat;
+
+local http = require "net.http";
+local frames = require "net.websocket.frames";
+local base64 = require "util.encodings".base64;
+local sha1 = require "util.hashes".sha1;
+local random_bytes = require "util.random".bytes;
+local timer = require "util.timer";
+local log = require "util.logger".init "websocket";
+
+local close_timeout = 3; -- Seconds to wait after sending close frame until closing connection.
+
+local websockets = {};
+
+local websocket_listeners = {};
+function websocket_listeners.ondisconnect(handler, err)
+ local s = websockets[handler];
+ websockets[handler] = nil;
+ if s.close_timer then
+ timer.stop(s.close_timer);
+ s.close_timer = nil;
+ end
+ s.readyState = 3;
+ if s.close_code == nil and s.onerror then s:onerror(err); end
+ if s.onclose then s:onclose(s.close_code, s.close_message or err); end
+end
+
+function websocket_listeners.ondetach(handler)
+ websockets[handler] = nil;
+end
+
+local function fail(s, code, reason)
+ module:log("warn", "WebSocket connection failed, closing. %d %s", code, reason);
+ s:close(code, reason);
+ s.handler:close();
+ return false
+end
+
+function websocket_listeners.onincoming(handler, buffer, err)
+ local s = websockets[handler];
+ s.readbuffer = s.readbuffer..buffer;
+ while true do
+ local frame, len = frames.parse(s.readbuffer);
+ if frame == nil then break end
+ s.readbuffer = s.readbuffer:sub(len+1);
+
+ log("debug", "Websocket received frame: opcode=%0x, %i bytes", frame.opcode, #frame.data);
+
+ -- Error cases
+ if frame.RSV1 or frame.RSV2 or frame.RSV3 then -- Reserved bits non zero
+ return fail(s, 1002, "Reserved bits not zero");
+ end
+
+ if frame.opcode < 0x8 then
+ local databuffer = s.databuffer;
+ if frame.opcode == 0x0 then -- Continuation frames
+ if not databuffer then
+ return fail(s, 1002, "Unexpected continuation frame");
+ end
+ databuffer[#databuffer+1] = frame.data;
+ elseif frame.opcode == 0x1 or frame.opcode == 0x2 then -- Text or Binary frame
+ if databuffer then
+ return fail(s, 1002, "Continuation frame expected");
+ end
+ databuffer = {type=frame.opcode, frame.data};
+ s.databuffer = databuffer;
+ else
+ return fail(s, 1002, "Reserved opcode");
+ end
+ if frame.FIN then
+ s.databuffer = nil;
+ if s.onmessage then
+ s:onmessage(t_concat(databuffer), databuffer.type);
+ end
+ end
+ else -- Control frame
+ if frame.length > 125 then -- Control frame with too much payload
+ return fail(s, 1002, "Payload too large");
+ elseif not frame.FIN then -- Fragmented control frame
+ return fail(s, 1002, "Fragmented control frame");
+ end
+ if frame.opcode == 0x8 then -- Close request
+ if frame.length == 1 then
+ return fail(s, 1002, "Close frame with payload, but too short for status code");
+ end
+ local status_code, message = frames.parse_close(frame.data);
+ if status_code == nil then
+ --[[ RFC 6455 7.4.1
+ 1005 is a reserved value and MUST NOT be set as a status code in a
+ Close control frame by an endpoint. It is designated for use in
+ applications expecting a status code to indicate that no status
+ code was actually present.
+ ]]
+ status_code = 1005
+ elseif status_code < 1000 then
+ return fail(s, 1002, "Closed with invalid status code");
+ elseif ((status_code > 1003 and status_code < 1007) or status_code > 1011) and status_code < 3000 then
+ return fail(s, 1002, "Closed with reserved status code");
+ end
+ s.close_code, s.close_message = status_code, message;
+ s:close(1000);
+ return true;
+ elseif frame.opcode == 0x9 then -- Ping frame
+ frame.opcode = 0xA;
+ frame.MASK = true; -- RFC 6455 6.1.5: If the data is being sent by the client, the frame(s) MUST be masked
+ handler:write(frames.build(frame));
+ elseif frame.opcode == 0xA then -- Pong frame
+ log("debug", "Received unexpected pong frame: " .. tostring(frame.data));
+ else
+ return fail(s, 1002, "Reserved opcode");
+ end
+ end
+ end
+ return true;
+end
+
+local websocket_methods = {};
+local function close_timeout_cb(now, timerid, s)
+ s.close_timer = nil;
+ log("warn", "Close timeout waiting for server to close, closing manually.");
+ s.handler:close();
+end
+function websocket_methods:close(code, reason)
+ if self.readyState < 2 then
+ code = code or 1000;
+ log("debug", "closing WebSocket with code %i: %s" , code , tostring(reason));
+ self.readyState = 2;
+ local handler = self.handler;
+ handler:write(frames.build_close(code, reason));
+ -- Do not close socket straight away, wait for acknowledgement from server.
+ self.close_timer = timer.add_task(close_timeout, close_timeout_cb, self);
+ elseif self.readyState == 2 then
+ log("debug", "tried to close a closing WebSocket, closing the raw socket.");
+ -- Stop timer
+ if self.close_timer then
+ timer.stop(self.close_timer);
+ self.close_timer = nil;
+ end
+ local handler = self.handler;
+ handler:close();
+ else
+ log("debug", "tried to close a closed WebSocket, ignoring.");
+ end
+end
+function websocket_methods:send(data, opcode)
+ if self.readyState < 1 then
+ return nil, "WebSocket not open yet, unable to send data.";
+ elseif self.readyState >= 2 then
+ return nil, "WebSocket closed, unable to send data.";
+ end
+ if opcode == "text" or opcode == nil then
+ opcode = 0x1;
+ elseif opcode == "binary" then
+ opcode = 0x2;
+ end
+ local frame = {
+ FIN = true;
+ MASK = true; -- RFC 6455 6.1.5: If the data is being sent by the client, the frame(s) MUST be masked
+ opcode = opcode;
+ data = tostring(data);
+ };
+ log("debug", "WebSocket sending frame: opcode=%0x, %i bytes", frame.opcode, #frame.data);
+ return self.handler:write(frames.build(frame));
+end
+
+local websocket_metatable = {
+ __index = websocket_methods;
+};
+
+local function connect(url, ex, listeners)
+ ex = ex or {};
+
+ --[[RFC 6455 4.1.7:
+ The request MUST include a header field with the name
+ |Sec-WebSocket-Key|. The value of this header field MUST be a
+ nonce consisting of a randomly selected 16-byte value that has
+ been base64-encoded (see Section 4 of [RFC4648]). The nonce
+ MUST be selected randomly for each connection.
+ ]]
+ local key = base64.encode(random_bytes(16));
+
+ -- Either a single protocol string or an array of protocol strings.
+ local protocol = ex.protocol;
+ if type(protocol) == "string" then
+ protocol = { protocol };
+ end
+ for _, v in ipairs(protocol) do
+ protocol[v] = true;
+ end
+
+ local headers = {
+ ["Upgrade"] = "websocket";
+ ["Connection"] = "Upgrade";
+ ["Sec-WebSocket-Key"] = key;
+ ["Sec-WebSocket-Protocol"] = t_concat(protocol, ", ");
+ ["Sec-WebSocket-Version"] = "13";
+ ["Sec-WebSocket-Extensions"] = ex.extensions;
+ }
+ if ex.headers then
+ for k,v in pairs(ex.headers) do
+ headers[k] = v;
+ end
+ end
+
+ local s = setmetatable({
+ readbuffer = "";
+ databuffer = nil;
+ handler = nil;
+ close_code = nil;
+ close_message = nil;
+ close_timer = nil;
+ readyState = 0;
+ protocol = nil;
+
+ url = url;
+
+ onopen = listeners.onopen;
+ onclose = listeners.onclose;
+ onmessage = listeners.onmessage;
+ onerror = listeners.onerror;
+ }, websocket_metatable);
+
+ local http_url = url:gsub("^(ws)", "http");
+ local http_req = http.request(http_url, {
+ method = "GET";
+ headers = headers;
+ sslctx = ex.sslctx;
+ }, function(b, c, r, http_req)
+ if c ~= 101
+ or r.headers["connection"]:lower() ~= "upgrade"
+ or r.headers["upgrade"] ~= "websocket"
+ or r.headers["sec-websocket-accept"] ~= base64.encode(sha1(key .. "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"))
+ or not protocol[r.headers["sec-websocket-protocol"]]
+ then
+ s.readyState = 3;
+ log("warn", "WebSocket connection to %s failed: %s", url, tostring(b));
+ if s.onerror then s:onerror("connecting-failed"); end
+ return;
+ end
+
+ s.protocol = r.headers["sec-websocket-protocol"];
+
+ -- Take possession of socket from http
+ http_req.conn = nil;
+ local handler = http_req.handler;
+ s.handler = handler;
+ websockets[handler] = s;
+ handler:setlistener(websocket_listeners);
+
+ log("debug", "WebSocket connected successfully to %s", url);
+ s.readyState = 1;
+ if s.onopen then s:onopen(); end
+ websocket_listeners.onincoming(handler, b);
+ end);
+
+ return s;
+end
+
+return {
+ connect = connect;
+};
diff --git a/net/websocket/frames.lua b/net/websocket/frames.lua
new file mode 100644
index 00000000..8bbddd1c
--- /dev/null
+++ b/net/websocket/frames.lua
@@ -0,0 +1,195 @@
+-- Prosody IM
+-- Copyright (C) 2012 Florian Zeitz
+-- Copyright (C) 2014 Daurnimator
+--
+-- This project is MIT/X11 licensed. Please see the
+-- COPYING file in the source package for more information.
+--
+
+local softreq = require "util.dependencies".softreq;
+local log = require "util.logger".init "websocket.frames";
+local random_bytes = require "util.random".bytes;
+
+local bit;
+pcall(function() bit = require"bit"; end);
+bit = bit or softreq"bit32"
+if not bit then log("error", "No bit module found. Either LuaJIT 2, lua-bitop or Lua 5.2 is required"); end
+local band = bit.band;
+local bor = bit.bor;
+local bxor = bit.bxor;
+local lshift = bit.lshift;
+local rshift = bit.rshift;
+
+local t_concat = table.concat;
+local s_byte = string.byte;
+local s_char= string.char;
+local s_sub = string.sub;
+
+local function read_uint16be(str, pos)
+ local l1, l2 = s_byte(str, pos, pos+1);
+ return l1*256 + l2;
+end
+-- FIXME: this may lose precision
+local function read_uint64be(str, pos)
+ local l1, l2, l3, l4, l5, l6, l7, l8 = s_byte(str, pos, pos+7);
+ return lshift(l1, 56) + lshift(l2, 48) + lshift(l3, 40) + lshift(l4, 32)
+ + lshift(l5, 24) + lshift(l6, 16) + lshift(l7, 8) + l8;
+end
+local function pack_uint16be(x)
+ return s_char(rshift(x, 8), band(x, 0xFF));
+end
+local function get_byte(x, n)
+ return band(rshift(x, n), 0xFF);
+end
+local function pack_uint64be(x)
+ return s_char(rshift(x, 56), get_byte(x, 48), get_byte(x, 40), get_byte(x, 32),
+ get_byte(x, 24), get_byte(x, 16), get_byte(x, 8), band(x, 0xFF));
+end
+
+local function parse_frame_header(frame)
+ if #frame < 2 then return; end
+
+ local byte1, byte2 = s_byte(frame, 1, 2);
+ local result = {
+ FIN = band(byte1, 0x80) > 0;
+ RSV1 = band(byte1, 0x40) > 0;
+ RSV2 = band(byte1, 0x20) > 0;
+ RSV3 = band(byte1, 0x10) > 0;
+ opcode = band(byte1, 0x0F);
+
+ MASK = band(byte2, 0x80) > 0;
+ length = band(byte2, 0x7F);
+ };
+
+ local length_bytes = 0;
+ if result.length == 126 then
+ length_bytes = 2;
+ elseif result.length == 127 then
+ length_bytes = 8;
+ end
+
+ local header_length = 2 + length_bytes + (result.MASK and 4 or 0);
+ if #frame < header_length then return; end
+
+ if length_bytes == 2 then
+ result.length = read_uint16be(frame, 3);
+ elseif length_bytes == 8 then
+ result.length = read_uint64be(frame, 3);
+ end
+
+ if result.MASK then
+ result.key = { s_byte(frame, length_bytes+3, length_bytes+6) };
+ end
+
+ return result, header_length;
+end
+
+-- XORs the string `str` with the array of bytes `key`
+-- TODO: optimize
+local function apply_mask(str, key, from, to)
+ from = from or 1
+ if from < 0 then from = #str + from + 1 end -- negative indicies
+ to = to or #str
+ if to < 0 then to = #str + to + 1 end -- negative indicies
+ local key_len = #key
+ local counter = 0;
+ local data = {};
+ for i = from, to do
+ local key_index = counter%key_len + 1;
+ counter = counter + 1;
+ data[counter] = s_char(bxor(key[key_index], s_byte(str, i)));
+ end
+ return t_concat(data);
+end
+
+local function parse_frame_body(frame, header, pos)
+ if header.MASK then
+ return apply_mask(frame, header.key, pos, pos + header.length - 1);
+ else
+ return frame:sub(pos, pos + header.length - 1);
+ end
+end
+
+local function parse_frame(frame)
+ local result, pos = parse_frame_header(frame);
+ if result == nil or #frame < (pos + result.length) then return; end
+ result.data = parse_frame_body(frame, result, pos+1);
+ return result, pos + result.length;
+end
+
+local function build_frame(desc)
+ local data = desc.data or "";
+
+ assert(desc.opcode and desc.opcode >= 0 and desc.opcode <= 0xF, "Invalid WebSocket opcode");
+ if desc.opcode >= 0x8 then
+ -- RFC 6455 5.5
+ assert(#data <= 125, "WebSocket control frames MUST have a payload length of 125 bytes or less.");
+ end
+
+ local b1 = bor(desc.opcode,
+ desc.FIN and 0x80 or 0,
+ desc.RSV1 and 0x40 or 0,
+ desc.RSV2 and 0x20 or 0,
+ desc.RSV3 and 0x10 or 0);
+
+ local b2 = #data;
+ local length_extra;
+ if b2 <= 125 then -- 7-bit length
+ length_extra = "";
+ elseif b2 <= 0xFFFF then -- 2-byte length
+ b2 = 126;
+ length_extra = pack_uint16be(#data);
+ else -- 8-byte length
+ b2 = 127;
+ length_extra = pack_uint64be(#data);
+ end
+
+ local key = ""
+ if desc.MASK then
+ local key_a = desc.key
+ if key_a then
+ key = s_char(unpack(key_a, 1, 4));
+ else
+ key = random_bytes(4);
+ key_a = {key:byte(1,4)};
+ end
+ b2 = bor(b2, 0x80);
+ data = apply_mask(data, key_a);
+ end
+
+ return s_char(b1, b2) .. length_extra .. key .. data
+end
+
+local function parse_close(data)
+ local code, message
+ if #data >= 2 then
+ code = read_uint16be(data, 1);
+ if #data > 2 then
+ message = s_sub(data, 3);
+ end
+ end
+ return code, message
+end
+
+local function build_close(code, message)
+ local data = pack_uint16be(code);
+ if message then
+ assert(#message<=123, "Close reason must be <=123 bytes");
+ data = data .. message;
+ end
+ return build_frame({
+ opcode = 0x8;
+ FIN = true;
+ MASK = true;
+ data = data;
+ });
+end
+
+return {
+ parse_header = parse_frame_header;
+ parse_body = parse_frame_body;
+ parse = parse_frame;
+ build = build_frame;
+ parse_close = parse_close;
+ build_close = build_close;
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-30 07:19:01 +0000