async_wrap: add provider types for net server

Adds `TCPSERVERWRAP` and `PIPESERVERWRAP` as provider types. This
makes it possible to distinguish servers from connections.

PR-URL: #17157
Backport-PR-URL: #17623
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

benchmark/net/tcp-raw-c2s.js

@@ -14,7 +14,7 @@ const bench = common.createBenchmark(main, {
   dur: [5]
 });
 
-const TCP = process.binding('tcp_wrap').TCP;
+const { TCP, constants: TCPConstants } = process.binding('tcp_wrap');
 const TCPConnectWrap = process.binding('tcp_wrap').TCPConnectWrap;
 const WriteWrap = process.binding('stream_wrap').WriteWrap;
 const PORT = common.PORT;
@@ -36,7 +36,7 @@ function fail(err, syscall) {
 }
 
 function server() {
-  const serverHandle = new TCP();
+  const serverHandle = new TCP(TCPConstants.SERVER);
   var err = serverHandle.bind('127.0.0.1', PORT);
   if (err)
     fail(err, 'bind');
@@ -92,7 +92,7 @@ function client() {
       throw new Error(`invalid type: ${type}`);
   }
 
-  const clientHandle = new TCP();
+  const clientHandle = new TCP(TCPConstants.SOCKET);
   const connectReq = new TCPConnectWrap();
   const err = clientHandle.connect(connectReq, '127.0.0.1', PORT);
 

benchmark/net/tcp-raw-pipe.js

@@ -14,7 +14,7 @@ const bench = common.createBenchmark(main, {
   dur: [5]
 });
 
-const TCP = process.binding('tcp_wrap').TCP;
+const { TCP, constants: TCPConstants } = process.binding('tcp_wrap');
 const TCPConnectWrap = process.binding('tcp_wrap').TCPConnectWrap;
 const WriteWrap = process.binding('stream_wrap').WriteWrap;
 const PORT = common.PORT;
@@ -35,7 +35,7 @@ function fail(err, syscall) {
 }
 
 function server() {
-  const serverHandle = new TCP();
+  const serverHandle = new TCP(TCPConstants.SERVER);
   var err = serverHandle.bind('127.0.0.1', PORT);
   if (err)
     fail(err, 'bind');
@@ -89,7 +89,7 @@ function client() {
       throw new Error(`invalid type: ${type}`);
   }
 
-  const clientHandle = new TCP();
+  const clientHandle = new TCP(TCPConstants.SOCKET);
   const connectReq = new TCPConnectWrap();
   const err = clientHandle.connect(connectReq, '127.0.0.1', PORT);
   var bytes = 0;

benchmark/net/tcp-raw-s2c.js

@@ -14,7 +14,7 @@ const bench = common.createBenchmark(main, {
   dur: [5]
 });
 
-const TCP = process.binding('tcp_wrap').TCP;
+const { TCP, constants: TCPConstants } = process.binding('tcp_wrap');
 const TCPConnectWrap = process.binding('tcp_wrap').TCPConnectWrap;
 const WriteWrap = process.binding('stream_wrap').WriteWrap;
 const PORT = common.PORT;
@@ -35,7 +35,7 @@ function fail(err, syscall) {
 }
 
 function server() {
-  const serverHandle = new TCP();
+  const serverHandle = new TCP(TCPConstants.SERVER);
   var err = serverHandle.bind('127.0.0.1', PORT);
   if (err)
     fail(err, 'bind');
@@ -107,7 +107,7 @@ function server() {
 }
 
 function client() {
-  const clientHandle = new TCP();
+  const clientHandle = new TCP(TCPConstants.SOCKET);
   const connectReq = new TCPConnectWrap();
   const err = clientHandle.connect(connectReq, '127.0.0.1', PORT);
 

doc/api/async_hooks.md

@@ -234,7 +234,7 @@ resource's constructor.
 ```text
 FSEVENTWRAP, FSREQWRAP, GETADDRINFOREQWRAP, GETNAMEINFOREQWRAP, HTTPPARSER,
 JSSTREAM, PIPECONNECTWRAP, PIPEWRAP, PROCESSWRAP, QUERYWRAP, SHUTDOWNWRAP,
-SIGNALWRAP, STATWATCHER, TCPCONNECTWRAP, TCPWRAP, TIMERWRAP, TTYWRAP,
+SIGNALWRAP, STATWATCHER, TCPCONNECTWRAP, TCPSERVER, TCPWRAP, TIMERWRAP, TTYWRAP,
 UDPSENDWRAP, UDPWRAP, WRITEWRAP, ZLIB, SSLCONNECTION, PBKDF2REQUEST,
 RANDOMBYTESREQUEST, TLSWRAP, Timeout, Immediate, TickObject
 ```
@@ -273,13 +273,13 @@ require('net').createServer((conn) => {}).listen(8080);
 Output when hitting the server with `nc localhost 8080`:
 
 ```console
-TCPWRAP(2): trigger: 1 execution: 1
+TCPSERVERWRAP(2): trigger: 1 execution: 1
 TCPWRAP(4): trigger: 2 execution: 0
 ```
 
-The first `TCPWRAP` is the server which receives the connections.
+The `TCPSERVERWRAP` is the server which receives the connections.
 
-The second `TCPWRAP` is the new connection from the client. When a new
+The `TCPWRAP` is the new connection from the client. When a new
 connection is made the `TCPWrap` instance is immediately constructed. This
 happens outside of any JavaScript stack (side note: a `executionAsyncId()` of `0`
 means it's being executed from C++, with no JavaScript stack above it).
@@ -352,7 +352,7 @@ require('net').createServer(() => {}).listen(8080, () => {
 Output from only starting the server:
 
 ```console
-TCPWRAP(2): trigger: 1 execution: 1
+TCPSERVERWRAP(2): trigger: 1 execution: 1
 TickObject(3): trigger: 2 execution: 1
 before:  3
   Timeout(4): trigger: 3 execution: 3
@@ -385,7 +385,7 @@ Only using `execution` to graph resource allocation results in the following:
 TTYWRAP(6) -> Timeout(4) -> TIMERWRAP(5) -> TickObject(3) -> root(1)
 ```
 
-The `TCPWRAP` is not part of this graph, even though it was the reason for
+The `TCPSERVERWRAP` is not part of this graph, even though it was the reason for
 `console.log()` being called. This is because binding to a port without a
 hostname is a *synchronous* operation, but to maintain a completely asynchronous
 API the user's callback is placed in a `process.nextTick()`.

lib/_tls_wrap.js

@@ -34,8 +34,8 @@ const { Buffer } = require('buffer');
 const debug = util.debuglog('tls');
 const { Timer } = process.binding('timer_wrap');
 const tls_wrap = process.binding('tls_wrap');
-const { TCP } = process.binding('tcp_wrap');
-const { Pipe } = process.binding('pipe_wrap');
+const { TCP, constants: TCPConstants } = process.binding('tcp_wrap');
+const { Pipe, constants: PipeConstants } = process.binding('pipe_wrap');
 const kDisableRenegotiation = Symbol('disable-renegotiation');
 
 function onhandshakestart() {
@@ -376,7 +376,9 @@ TLSSocket.prototype._wrapHandle = function(wrap) {
 
   var options = this._tlsOptions;
   if (!handle) {
-    handle = options.pipe ? new Pipe() : new TCP();
+    handle = options.pipe ?
+      new Pipe(PipeConstants.SOCKET) :
+      new TCP(TCPConstants.SOCKET);
     handle.owner = this;
   }
 

lib/child_process.js

@@ -31,7 +31,7 @@ const debug = util.debuglog('child_process');
 const uv = process.binding('uv');
 const spawn_sync = process.binding('spawn_sync');
 const { Buffer } = require('buffer');
-const { Pipe } = process.binding('pipe_wrap');
+const { Pipe, constants: PipeConstants } = process.binding('pipe_wrap');
 const child_process = require('internal/child_process');
 const {
   _validateStdio,
@@ -106,7 +106,7 @@ exports.fork = function(modulePath /*, args, options*/) {
 
 exports._forkChild = function(fd) {
   // set process.send()
-  var p = new Pipe(true);
+  var p = new Pipe(PipeConstants.IPC);
   p.open(fd);
   p.unref();
   const control = setupChannel(process, p);

lib/internal/child_process.js

@@ -10,7 +10,7 @@ const assert = require('assert');
 const uv = process.binding('uv');
 const { Process } = process.binding('process_wrap');
 const { WriteWrap } = process.binding('stream_wrap');
-const { Pipe } = process.binding('pipe_wrap');
+const { Pipe, constants: PipeConstants } = process.binding('pipe_wrap');
 const { TTY } = process.binding('tty_wrap');
 const { TCP } = process.binding('tcp_wrap');
 const { UDP } = process.binding('udp_wrap');
@@ -845,7 +845,7 @@ function _validateStdio(stdio, sync) {
       };
 
       if (!sync)
-        a.handle = new Pipe();
+        a.handle = new Pipe(PipeConstants.SOCKET);
 
       acc.push(a);
     } else if (stdio === 'ipc') {
@@ -858,7 +858,7 @@ function _validateStdio(stdio, sync) {
           throw new errors.Error('ERR_IPC_SYNC_FORK');
       }
 
-      ipc = new Pipe(true);
+      ipc = new Pipe(PipeConstants.IPC);
       ipcFd = i;
 
       acc.push({

lib/net.js

@@ -33,8 +33,8 @@ const uv = process.binding('uv');
 
 const { Buffer } = require('buffer');
 const TTYWrap = process.binding('tty_wrap');
-const { TCP } = process.binding('tcp_wrap');
-const { Pipe } = process.binding('pipe_wrap');
+const { TCP, constants: TCPConstants } = process.binding('tcp_wrap');
+const { Pipe, constants: PipeConstants } = process.binding('pipe_wrap');
 const { TCPConnectWrap } = process.binding('tcp_wrap');
 const { PipeConnectWrap } = process.binding('pipe_wrap');
 const { ShutdownWrap, WriteWrap } = process.binding('stream_wrap');
@@ -53,10 +53,20 @@ const exceptionWithHostPort = util._exceptionWithHostPort;
 
 function noop() {}
 
-function createHandle(fd) {
-  var type = TTYWrap.guessHandleType(fd);
-  if (type === 'PIPE') return new Pipe();
-  if (type === 'TCP') return new TCP();
+function createHandle(fd, is_server) {
+  const type = TTYWrap.guessHandleType(fd);
+  if (type === 'PIPE') {
+    return new Pipe(
+      is_server ? PipeConstants.SERVER : PipeConstants.SOCKET
+    );
+  }
+
+  if (type === 'TCP') {
+    return new TCP(
+      is_server ? TCPConstants.SERVER : TCPConstants.SOCKET
+    );
+  }
+
   throw new TypeError('Unsupported fd type: ' + type);
 }
 
@@ -196,7 +206,7 @@ function Socket(options) {
     this._handle = options.handle; // private
     this[async_id_symbol] = getNewAsyncId(this._handle);
   } else if (options.fd !== undefined) {
-    this._handle = createHandle(options.fd);
+    this._handle = createHandle(options.fd, false);
     this._handle.open(options.fd);
     this[async_id_symbol] = this._handle.getAsyncId();
     // options.fd can be string (since it is user-defined),
@@ -1003,7 +1013,9 @@ Socket.prototype.connect = function(...args) {
   debug('pipe', pipe, path);
 
   if (!this._handle) {
-    this._handle = pipe ? new Pipe() : new TCP();
+    this._handle = pipe ?
+      new Pipe(PipeConstants.SOCKET) :
+      new TCP(TCPConstants.SOCKET);
     initSocketHandle(this);
   }
 
@@ -1253,7 +1265,7 @@ function createServerHandle(address, port, addressType, fd) {
   var isTCP = false;
   if (typeof fd === 'number' && fd >= 0) {
     try {
-      handle = createHandle(fd);
+      handle = createHandle(fd, true);
     } catch (e) {
       // Not a fd we can listen on.  This will trigger an error.
       debug('listen invalid fd=%d:', fd, e.message);
@@ -1264,15 +1276,15 @@ function createServerHandle(address, port, addressType, fd) {
     handle.writable = true;
     assert(!address && !port);
   } else if (port === -1 && addressType === -1) {
-    handle = new Pipe();
+    handle = new Pipe(PipeConstants.SERVER);
     if (process.platform === 'win32') {
       var instances = parseInt(process.env.NODE_PENDING_PIPE_INSTANCES);
       if (!isNaN(instances)) {
         handle.setPendingInstances(instances);
       }
     }
   } else {
-    handle = new TCP();
+    handle = new TCP(TCPConstants.SERVER);
     isTCP = true;
   }
 

src/async-wrap.h

@@ -47,6 +47,7 @@ namespace node {
   V(HTTPPARSER)                                                               \
   V(JSSTREAM)                                                                 \
   V(PIPECONNECTWRAP)                                                          \
+  V(PIPESERVERWRAP)                                                           \
   V(PIPEWRAP)                                                                 \
   V(PROCESSWRAP)                                                              \
   V(PROMISE)                                                                  \
@@ -55,6 +56,7 @@ namespace node {
   V(SIGNALWRAP)                                                               \
   V(STATWATCHER)                                                              \
   V(TCPCONNECTWRAP)                                                           \
+  V(TCPSERVERWRAP)                                                            \
   V(TCPWRAP)                                                                  \
   V(TIMERWRAP)                                                                \
   V(TTYWRAP)                                                                  \

src/connection_wrap.cc

@@ -51,7 +51,9 @@ void ConnectionWrap<WrapType, UVType>::OnConnection(uv_stream_t* handle,
   if (status == 0) {
     env->set_init_trigger_async_id(wrap_data->get_async_id());
     // Instantiate the client javascript object and handle.
-    Local<Object> client_obj = WrapType::Instantiate(env, wrap_data);
+    Local<Object> client_obj = WrapType::Instantiate(env,
+                                                     wrap_data,
+                                                     WrapType::SOCKET);
 
     // Unwrap the client javascript object.
     WrapType* wrap;

src/pipe_wrap.cc

@@ -39,6 +39,7 @@ using v8::Function;
 using v8::FunctionCallbackInfo;
 using v8::FunctionTemplate;
 using v8::HandleScope;
+using v8::Int32;
 using v8::Local;
 using v8::Object;
 using v8::String;
@@ -47,14 +48,17 @@ using v8::Value;
 using AsyncHooks = Environment::AsyncHooks;
 
 
-Local<Object> PipeWrap::Instantiate(Environment* env, AsyncWrap* parent) {
+Local<Object> PipeWrap::Instantiate(Environment* env,
+                                    AsyncWrap* parent,
+                                    PipeWrap::SocketType type) {
   EscapableHandleScope handle_scope(env->isolate());
   AsyncHooks::InitScope init_scope(env, parent->get_async_id());
   CHECK_EQ(false, env->pipe_constructor_template().IsEmpty());
   Local<Function> constructor = env->pipe_constructor_template()->GetFunction();
   CHECK_EQ(false, constructor.IsEmpty());
+  Local<Value> type_value = Int32::New(env->isolate(), type);
   Local<Object> instance =
-      constructor->NewInstance(env->context()).ToLocalChecked();
+      constructor->NewInstance(env->context(), 1, &type_value).ToLocalChecked();
   return handle_scope.Escape(instance);
 }
 
@@ -106,6 +110,15 @@ void PipeWrap::Initialize(Local<Object> target,
       FIXED_ONE_BYTE_STRING(env->isolate(), "PipeConnectWrap");
   cwt->SetClassName(wrapString);
   target->Set(wrapString, cwt->GetFunction());
+
+  // Define constants
+  Local<Object> constants = Object::New(env->isolate());
+  NODE_DEFINE_CONSTANT(constants, SOCKET);
+  NODE_DEFINE_CONSTANT(constants, SERVER);
+  NODE_DEFINE_CONSTANT(constants, IPC);
+  target->Set(context,
+              FIXED_ONE_BYTE_STRING(env->isolate(), "constants"),
+              constants).FromJust();
 }
 
 
@@ -114,17 +127,40 @@ void PipeWrap::New(const FunctionCallbackInfo<Value>& args) {
   // Therefore we assert that we are not trying to call this as a
   // normal function.
   CHECK(args.IsConstructCall());
+  CHECK(args[0]->IsInt32());
   Environment* env = Environment::GetCurrent(args);
-  new PipeWrap(env, args.This(), args[0]->IsTrue());
+
+  int type_value = args[0].As<Int32>()->Value();
+  PipeWrap::SocketType type = static_cast<PipeWrap::SocketType>(type_value);
+
+  bool ipc;
+  ProviderType provider;
+  switch (type) {
+    case SOCKET:
+      provider = PROVIDER_PIPEWRAP;
+      ipc = false;
+      break;
+    case SERVER:
+      provider = PROVIDER_PIPESERVERWRAP;
+      ipc = false;
+      break;
+    case IPC:
+      provider = PROVIDER_PIPEWRAP;
+      ipc = true;
+      break;
+    default:
+      UNREACHABLE();
+  }
+
+  new PipeWrap(env, args.This(), provider, ipc);
 }
 
 
 PipeWrap::PipeWrap(Environment* env,
                    Local<Object> object,
+                   ProviderType provider,
                    bool ipc)
-    : ConnectionWrap(env,
-                     object,
-                     AsyncWrap::PROVIDER_PIPEWRAP) {
+    : ConnectionWrap(env, object, provider) {
   int r = uv_pipe_init(env->event_loop(), &handle_, ipc);
   CHECK_EQ(r, 0);  // How do we proxy this error up to javascript?
                    // Suggestion: uv_pipe_init() returns void.