lib,src: add unix socket getsockname/getpeername

The implementation is a minor API change in that socket.address() now
returns a `{ address: '/path/to/socket' }` object, like it does for TCP
and UDP sockets.  Before this commit, it returned `socket._pipeName`,
which is a string when present.

Change common.PIPE on Windows from '\\\\.\\pipe\\libuv-test' to
'\\\\?\\pipe\\libuv-test'.  Windows converts the '.' to a '?' when
creating a named pipe, meaning that common.PIPE didn't match the
result from NtQueryInformationFile().

Fixes: #954
PR-URL: #956
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>

Author: bnoordhuis

Diff for: doc/api/net.markdown

@@ -255,6 +255,9 @@ Example:
 
 Don't call `server.address()` until the `'listening'` event has been emitted.
 
+This method used to return the file path as a string for UNIX sockets and
+Windows pipes.  As of io.js v1.5.0, it returns the expected object.
+
 ### server.unref()
 
 Calling `unref` on a server will allow the program to exit if this is the only
@@ -508,25 +511,32 @@ Returns `socket`.
 The string representation of the remote IP address. For example,
 `'74.125.127.100'` or `'2001:4860:a005::68'`.
 
+For UNIX sockets and Windows pipes, the file path the socket is connected
+to.  The remote address for server sockets is always `''`, the empty string.
+
 ### socket.remoteFamily
 
-The string representation of the remote IP family. `'IPv4'` or `'IPv6'`.
+The string representation of the remote IP family. `'IPv4'` or `'IPv6'`
+for TCP sockets, `'pipe'` for UNIX sockets and Windows pipes.
 
 ### socket.remotePort
 
-The numeric representation of the remote port. For example,
-`80` or `21`.
+The numeric representation of the remote port. For example, `80` or `21`.
+`undefined` for UNIX sockets and Windows pipes.
 
 ### socket.localAddress
 
 The string representation of the local IP address the remote client is
 connecting on. For example, if you are listening on `'0.0.0.0'` and the
 client connects on `'192.168.1.1'`, the value would be `'192.168.1.1'`.
 
+For UNIX sockets and Windows pipes, the file path the socket is listening
+on.  The local address for client sockets is always `''`, the empty string.
+
 ### socket.localPort
 
-The numeric representation of the local port. For example,
-`80` or `21`.
+The numeric representation of the local port. For example, `80` or `21`.
+`undefined` for UNIX sockets and Windows pipes.
 
 ### socket.bytesRead
 

Diff for: lib/net.js

@@ -1339,16 +1339,14 @@ Server.prototype.listen = function() {
         else
           listen(self, null, h.port | 0, 4, backlog, undefined, h.exclusive);
       } else if (h.path && isPipeName(h.path)) {
-        var pipeName = self._pipeName = h.path;
-        listen(self, pipeName, -1, -1, backlog, undefined, h.exclusive);
+        listen(self, h.path, -1, -1, backlog, undefined, h.exclusive);
       } else {
         throw new Error('Invalid listen argument: ' + h);
       }
     }
   } else if (isPipeName(arguments[0])) {
     // UNIX socket or Windows pipe.
-    var pipeName = self._pipeName = arguments[0];
-    listen(self, pipeName, -1, -1, backlog);
+    listen(self, arguments[0], -1, -1, backlog);
 
   } else if (arguments[1] === undefined ||
              typeof arguments[1] === 'function' ||
@@ -1381,8 +1379,6 @@ Server.prototype.address = function() {
     this._handle.getsockname(out);
     // TODO(bnoordhuis) Check err and throw?
     return out;
-  } else if (this._pipeName) {
-    return this._pipeName;
   } else {
     return null;
   }

Diff for: src/pipe_wrap.cc

@@ -89,6 +89,10 @@ void PipeWrap::Initialize(Handle<Object> target,
   env->SetProtoMethod(t, "listen", Listen);
   env->SetProtoMethod(t, "connect", Connect);
   env->SetProtoMethod(t, "open", Open);
+  env->SetProtoMethod(t, "getpeername",
+                      GetSockOrPeerName<uv_pipe_getpeername>);
+  env->SetProtoMethod(t, "getsockname",
+                      GetSockOrPeerName<uv_pipe_getsockname>);
 
 #ifdef _WIN32
   env->SetProtoMethod(t, "setPendingInstances", SetPendingInstances);
@@ -276,6 +280,28 @@ void PipeWrap::Connect(const FunctionCallbackInfo<Value>& args) {
 }
 
 
+template <int (*F)(const uv_pipe_t*, char*, size_t*)>
+void PipeWrap::GetSockOrPeerName(
+    const v8::FunctionCallbackInfo<v8::Value>& args) {
+  CHECK(args[0]->IsObject());
+  char buffer[1024];
+  size_t size = sizeof(buffer);
+  const PipeWrap* wrap = Unwrap<PipeWrap>(args.Holder());
+  const int err = F(&wrap->handle_, buffer, &size);
+  if (err == 0) {
+    const uint8_t* data = reinterpret_cast<const uint8_t*>(buffer);
+    const String::NewStringType type = String::kNormalString;
+    Local<String> path =
+        String::NewFromOneByte(args.GetIsolate(), data, type, size);
+    Environment* env = Environment::GetCurrent(args);
+    Local<Object> out = args[0].As<Object>();
+    out->Set(env->address_string(), path);
+    out->Set(env->family_string(), env->pipe_string());
+  }
+  args.GetReturnValue().Set(err);
+}
+
+
 }  // namespace node
 
 NODE_MODULE_CONTEXT_AWARE_BUILTIN(pipe_wrap, node::PipeWrap::Initialize)

Diff for: src/pipe_wrap.h

@@ -30,6 +30,9 @@ class PipeWrap : public StreamWrap {
   static void Connect(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void Open(const v8::FunctionCallbackInfo<v8::Value>& args);
 
+  template <int (*F)(const uv_pipe_t*, char*, size_t*)>
+  static void GetSockOrPeerName(const v8::FunctionCallbackInfo<v8::Value>&);
+
 #ifdef _WIN32
   static void SetPendingInstances(
       const v8::FunctionCallbackInfo<v8::Value>& args);

Diff for: test/common.js

@@ -134,7 +134,7 @@ Object.defineProperty(exports, 'hasCrypto', {get: function() {
 }});
 
 if (exports.isWindows) {
-  exports.PIPE = '\\\\.\\pipe\\libuv-test';
+  exports.PIPE = '\\\\?\\pipe\\libuv-test';
 } else {
   exports.PIPE = exports.tmpDir + '/test.sock';
 }

Diff for: test/parallel/test-cluster-http-pipe.js

@@ -29,8 +29,11 @@ if (cluster.isMaster) {
 }
 
 http.createServer(function(req, res) {
-  assert.equal(req.connection.remoteAddress, undefined);
-  assert.equal(req.connection.localAddress, undefined); // TODO common.PIPE?
+  assert.equal(req.connection.remoteAddress, '');
+  assert.equal(req.connection.remoteFamily, 'pipe');
+  assert.equal(req.connection.remotePort, undefined);
+  assert.equal(req.connection.localAddress, common.PIPE);
+  assert.equal(req.connection.localPort, undefined);
   res.writeHead(200);
   res.end('OK');
 }).listen(common.PIPE, function() {

Diff for: test/parallel/test-http-unix-socket.js

@@ -9,6 +9,7 @@ var headers_ok = false;
 var body_ok = false;
 
 var server = http.createServer(function(req, res) {
+  assert.equal(req.socket.address().address, common.PIPE);
   res.writeHead(200, {
     'Content-Type': 'text/plain',
     'Connection': 'close'
@@ -19,6 +20,7 @@ var server = http.createServer(function(req, res) {
 });
 
 server.listen(common.PIPE, function() {
+  assert.equal(server.address().address, common.PIPE);
 
   var options = {
     socketPath: common.PIPE,

Diff for: test/sequential/test-pipe-address.js

@@ -15,5 +15,6 @@ server.listen(common.PIPE, function() {
 });
 
 process.on('exit', function() {
-  assert.equal(address, common.PIPE);
+  assert.equal(address.address, common.PIPE);
+  assert.equal(address.family, 'pipe');
 });