diff options
Diffstat (limited to 'net/server_epoll.lua')
| -rw-r--r-- | net/server_epoll.lua | 92 |
1 files changed, 68 insertions, 24 deletions
diff --git a/net/server_epoll.lua b/net/server_epoll.lua index 5f62d931..49ad48ea 100644 --- a/net/server_epoll.lua +++ b/net/server_epoll.lua @@ -9,12 +9,12 @@ local t_insert = table.insert; local t_concat = table.concat; local setmetatable = setmetatable; -local tostring = tostring; local pcall = pcall; local type = type; local next = next; local pairs = pairs; -local log = require "util.logger".init("server_epoll"); +local logger = require "util.logger"; +local log = logger.init("server_epoll"); local socket = require "socket"; local luasec = require "ssl"; local gettime = require "util.time".now; @@ -23,6 +23,7 @@ local createtable = require "util.table".create; local inet = require "util.net"; local inet_pton = inet.pton; local _SOCKETINVALID = socket._SOCKETINVALID or -1; +local new_id = require "util.id".medium; local poller = require "util.poll" local EEXIST = poller.EEXIST; @@ -61,6 +62,10 @@ local default_config = { __index = { -- Maximum and minimum amount of time to sleep waiting for events (adjusted for pending timers) max_wait = 86400; min_wait = 1e-06; + + -- EXPERIMENTAL + -- Whether to kill connections in case of callback errors. + fatal_errors = false; }}; local cfg = default_config.__index; @@ -141,6 +146,15 @@ function interface_mt:__tostring() return ("FD %d"):format(self:getfd()); end +interface.log = log; +function interface:debug(msg, ...) --luacheck: ignore 212/self + self.log("debug", msg, ...); +end + +function interface:error(msg, ...) --luacheck: ignore 212/self + self.log("error", msg, ...); +end + -- Replace the listener and tell the old one function interface:setlistener(listeners, data) self:on("detach"); @@ -151,18 +165,23 @@ end -- Call a listener callback function interface:on(what, ...) if not self.listeners then - log("error", "%s has no listeners", self); + self:debug("Interface is missing listener callbacks"); return; end local listener = self.listeners["on"..what]; if not listener then - -- log("debug", "Missing listener 'on%s'", what); -- uncomment for development and debugging + -- self:debug("Missing listener 'on%s'", what); -- uncomment for development and debugging return; end local ok, err = pcall(listener, self, ...); if not ok then - log("error", "Error calling on%s: %s", what, err); - return; + if cfg.fatal_errors then + self:debug("Closing due to error calling on%s: %s", what, err); + self:destroy(); + else + self:debug("Error calling on%s: %s", what, err); + end + return nil, err; end return err; end @@ -273,15 +292,15 @@ function interface:add(r, w) local ok, err, errno = poll:add(fd, r, w); if not ok then if errno == EEXIST then - log("debug", "%s already registered!", self); + self:debug("FD already registered in poller! (EEXIST)"); return self:set(r, w); -- So try to change its flags end - log("error", "Could not register %s: %s(%d)", self, err, errno); + self:debug("Could not register in poller: %s(%d)", err, errno); return ok, err; end self._wantread, self._wantwrite = r, w; fds[fd] = self; - log("debug", "Watching %s", self); + self:debug("Registered in poller"); return true; end @@ -294,7 +313,7 @@ function interface:set(r, w) if w == nil then w = self._wantwrite; end local ok, err, errno = poll:set(fd, r, w); if not ok then - log("error", "Could not update poller state %s: %s(%d)", self, err, errno); + self:debug("Could not update poller state: %s(%d)", err, errno); return ok, err; end self._wantread, self._wantwrite = r, w; @@ -311,12 +330,12 @@ function interface:del() end local ok, err, errno = poll:del(fd); if not ok and errno ~= ENOENT then - log("error", "Could not unregister %s: %s(%d)", self, err, errno); + self:debug("Could not unregister: %s(%d)", err, errno); return ok, err; end self._wantread, self._wantwrite = nil, nil; fds[fd] = nil; - log("debug", "Unwatched %s", self); + self:debug("Unregistered from poller"); return true; end @@ -358,6 +377,14 @@ function interface:onreadable() end end if not self.conn then return; end + if self._limit and (data or partial) then + local cost = self._limit * #(data or partial); + if cost > cfg.min_wait then + self:setreadtimeout(false); + self:pausefor(cost); + return; + end + end if self._wantread and self.conn:dirty() then self:setreadtimeout(false); self:pausefor(cfg.read_retry_delay); @@ -424,10 +451,10 @@ function interface:close() if self.writebuffer and self.writebuffer[1] then self:set(false, true); -- Flush final buffer contents self.write, self.send = noop, noop; -- No more writing - log("debug", "Close %s after writing", self); + self:debug("Close after writing"); self.ondrain = interface.close; else - log("debug", "Close %s now", self); + self:debug("Closing now"); self.write, self.send = noop, noop; self.close = noop; self:on("disconnect"); @@ -456,7 +483,7 @@ function interface:starttls(tls_ctx) if tls_ctx then self.tls_ctx = tls_ctx; end self.starttls = false; if self.writebuffer and self.writebuffer[1] then - log("debug", "Start TLS on %s after write", self); + self:debug("Start TLS after write"); self.ondrain = interface.starttls; self:set(nil, true); -- make sure wantwrite is set else @@ -466,7 +493,7 @@ function interface:starttls(tls_ctx) self.onwritable = interface.tlshandskake; self.onreadable = interface.tlshandskake; self:set(true, true); - log("debug", "Prepare to start TLS on %s", self); + self:debug("Prepared to start TLS"); end end @@ -475,12 +502,12 @@ function interface:tlshandskake() self:setreadtimeout(false); if not self._tls then self._tls = true; - log("debug", "Start TLS on %s now", self); + self:debug("Starting TLS now"); self:del(); local ok, conn, err = pcall(luasec.wrap, self.conn, self.tls_ctx); if not ok then conn, err = ok, conn; - log("error", "Failed to initialize TLS: %s", err); + self:debug("Failed to initialize TLS: %s", err); end if not conn then self:on("disconnect", err); @@ -504,22 +531,22 @@ function interface:tlshandskake() end local ok, err = self.conn:dohandshake(); if ok then - log("debug", "TLS handshake on %s complete", self); + self:debug("TLS handshake complete"); self.onwritable = nil; self.onreadable = nil; self:on("status", "ssl-handshake-complete"); self:setwritetimeout(); self:set(true, true); elseif err == "wantread" then - log("debug", "TLS handshake on %s to wait until readable", self); + self:debug("TLS handshake to wait until readable"); self:set(true, false); self:setreadtimeout(cfg.ssl_handshake_timeout); elseif err == "wantwrite" then - log("debug", "TLS handshake on %s to wait until writable", self); + self:debug("TLS handshake to wait until writable"); self:set(false, true); self:setwritetimeout(cfg.ssl_handshake_timeout); else - log("debug", "TLS handshake error on %s: %s", self, err); + self:debug("TLS handshake error: %s", err); self:on("disconnect", err); self:destroy(); end @@ -536,6 +563,7 @@ local function wrapsocket(client, server, read_size, listeners, tls_ctx) -- luas writebuffer = {}; tls_ctx = tls_ctx or (server and server.tls_ctx); tls_direct = server and server.tls_direct; + log = logger.init(("conn%s"):format(new_id())); }, interface_mt); conn:updatenames(); @@ -559,12 +587,12 @@ end function interface:onacceptable() local conn, err = self.conn:accept(); if not conn then - log("debug", "Error accepting new client: %s, server will be paused for %ds", err, cfg.accept_retry_interval); + self:debug("Error accepting new client: %s, server will be paused for %ds", err, cfg.accept_retry_interval); self:pausefor(cfg.accept_retry_interval); return; end local client = wrapsocket(conn, self, nil, self.listeners); - log("debug", "New connection %s", tostring(client)); + client:debug("New connection %s on server %s", client, self); client:init(); if self.tls_direct then client:starttls(self.tls_ctx); @@ -589,6 +617,7 @@ end -- Pause connection for some time function interface:pausefor(t) + self:debug("Pause for %fs", t); if self._pausefor then self._pausefor:close(); end @@ -603,6 +632,14 @@ function interface:pausefor(t) end); end +function interface:setlimit(Bps) + if Bps > 0 then + self._limit = 1/Bps; + else + self._limit = nil; + end +end + function interface:pause_writes() self._write_lock = true; self:setwritetimeout(false); @@ -639,7 +676,9 @@ local function listen(addr, port, listeners, config) hosts = config and config.sni_hosts; sockname = addr; sockport = port; + log = logger.init(("serv%s"):format(new_id())); }, interface_mt); + server:debug("Server %s created", server); server:add(true, false); return server; end @@ -686,6 +725,7 @@ local function addclient(addr, port, listeners, read_size, tls_ctx, typ) return nil, "invalid socket type"; end local conn, err = create(); + if not conn then return conn, err; end local ok, err = conn:settimeout(0); if not ok then return ok, err; end local ok, err = conn:setpeername(addr, port); @@ -696,6 +736,7 @@ local function addclient(addr, port, listeners, read_size, tls_ctx, typ) if tls_ctx then client:starttls(tls_ctx); end + client:debug("Client %s created", client); return client, conn; end @@ -714,6 +755,7 @@ local function watchfd(fd, onreadable, onwritable) end; -- Otherwise it'll need to be something LuaSocket-compatible end + conn.log = logger.init(("fdwatch%s"):format(new_id())); conn:add(onreadable, onwritable); return conn; end; @@ -804,6 +846,7 @@ return { -- libevent emulation event = { EV_READ = "r", EV_WRITE = "w", EV_READWRITE = "rw", EV_LEAVE = -1 }; addevent = function (fd, mode, callback) + log("warn", "Using deprecated libevent emulation, please update code to use watchfd API instead"); local function onevent(self) local ret = self:callback(); if ret == -1 then @@ -823,6 +866,7 @@ return { fds[fd] = nil; end; }, interface_mt); + conn.log = logger.init(("fdwatch%d"):format(conn:getfd())); local ok, err = conn:add(mode == "r" or mode == "rw", mode == "w" or mode == "rw"); if not ok then return ok, err; end return conn; |