nstdlib-nightly/lib/dgram.mjs

Node.js standard library converted to runtime-agnostic ES modules.

// Source: https://github.com/nodejs/node/blob/65eff1eb/lib/dgram.js

import * as __hoisted_cluster__ from "nstdlib/lib/cluster";
import {
  ErrnoException,
  ExceptionWithHostPort,
  codes as __codes__,
} from "nstdlib/lib/internal/errors";
import {
  kStateSymbol,
  _createSocketHandle,
  newHandle,
} from "nstdlib/lib/internal/dgram";
import {
  isInt32,
  validateAbortSignal,
  validateString,
  validateNumber,
  validatePort,
} from "nstdlib/lib/internal/validators";
import { Buffer } from "nstdlib/lib/buffer";
import {
  deprecate,
  guessHandleType,
  promisify,
} from "nstdlib/lib/internal/util";
import { isArrayBufferView } from "nstdlib/lib/internal/util/types";
import * as EventEmitter from "nstdlib/lib/events";
import { addAbortListener } from "nstdlib/lib/internal/events/abort_listener";
import {
  defaultTriggerAsyncIdScope,
  symbols as __symbols__,
} from "nstdlib/lib/internal/async_hooks";
import {
  constants as __constants__,
  UDP,
  SendWrap,
} from "nstdlib/stub/binding/udp_wrap";
import * as dc from "nstdlib/lib/diagnostics_channel";
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

const {
  ERR_BUFFER_OUT_OF_BOUNDS,
  ERR_INVALID_ARG_TYPE,
  ERR_INVALID_FD_TYPE,
  ERR_MISSING_ARGS,
  ERR_SOCKET_ALREADY_BOUND,
  ERR_SOCKET_BAD_BUFFER_SIZE,
  ERR_SOCKET_BUFFER_SIZE,
  ERR_SOCKET_DGRAM_IS_CONNECTED,
  ERR_SOCKET_DGRAM_NOT_CONNECTED,
  ERR_SOCKET_DGRAM_NOT_RUNNING,
} = __codes__;

const { async_id_symbol, owner_symbol } = __symbols__;
const { UV_UDP_REUSEADDR } = require("binding/constants").os;

const { UV_UDP_IPV6ONLY } = __constants__;

const udpSocketChannel = dc.channel("udp.socket");

const BIND_STATE_UNBOUND = 0;
const BIND_STATE_BINDING = 1;
const BIND_STATE_BOUND = 2;

const CONNECT_STATE_DISCONNECTED = 0;
const CONNECT_STATE_CONNECTING = 1;
const CONNECT_STATE_CONNECTED = 2;

const RECV_BUFFER = true;
const SEND_BUFFER = false;

// Lazily loaded
let _cluster = null;
function lazyLoadCluster() {
  if (!_cluster) _cluster = __hoisted_cluster__;
  return _cluster;
}

function Socket(type, listener) {
  Function.prototype.call.call(EventEmitter, this);
  let lookup;
  let recvBufferSize;
  let sendBufferSize;

  let options;
  if (type !== null && typeof type === "object") {
    options = type;
    type = options.type;
    lookup = options.lookup;
    recvBufferSize = options.recvBufferSize;
    sendBufferSize = options.sendBufferSize;
  }

  const handle = newHandle(type, lookup);
  handle[owner_symbol] = this;

  this[async_id_symbol] = handle.getAsyncId();
  this.type = type;

  if (typeof listener === "function") this.on("message", listener);

  this[kStateSymbol] = {
    handle,
    receiving: false,
    bindState: BIND_STATE_UNBOUND,
    connectState: CONNECT_STATE_DISCONNECTED,
    queue: undefined,
    reuseAddr: options && options.reuseAddr, // Use UV_UDP_REUSEADDR if true.
    ipv6Only: options && options.ipv6Only,
    recvBufferSize,
    sendBufferSize,
  };

  if (options?.signal !== undefined) {
    const { signal } = options;
    validateAbortSignal(signal, "options.signal");
    const onAborted = () => {
      if (this[kStateSymbol].handle) this.close();
    };
    if (signal.aborted) {
      onAborted();
    } else {
      const disposable = addAbortListener(signal, onAborted);
      this.once("close", disposable[Symbol.for("nodejs.dispose")]);
    }
  }
  if (udpSocketChannel.hasSubscribers) {
    udpSocketChannel.publish({
      socket: this,
    });
  }
}
Object.setPrototypeOf(Socket.prototype, EventEmitter.prototype);
Object.setPrototypeOf(Socket, EventEmitter);

function createSocket(type, listener) {
  return new Socket(type, listener);
}

function startListening(socket) {
  const state = socket[kStateSymbol];

  state.handle.onmessage = onMessage;
  state.handle.onerror = onError;
  state.handle.recvStart();
  state.receiving = true;
  state.bindState = BIND_STATE_BOUND;

  if (state.recvBufferSize)
    bufferSize(socket, state.recvBufferSize, RECV_BUFFER);

  if (state.sendBufferSize)
    bufferSize(socket, state.sendBufferSize, SEND_BUFFER);

  socket.emit("listening");
}

function replaceHandle(self, newHandle) {
  const state = self[kStateSymbol];
  const oldHandle = state.handle;
  // Sync the old handle state to new handle
  if (!oldHandle.hasRef() && typeof newHandle.unref === "function") {
    newHandle.unref();
  }
  // Set up the handle that we got from primary.
  newHandle.lookup = oldHandle.lookup;
  newHandle.bind = oldHandle.bind;
  newHandle.send = oldHandle.send;
  newHandle[owner_symbol] = self;

  // Replace the existing handle by the handle we got from primary.
  oldHandle.close();
  state.handle = newHandle;
}

function bufferSize(self, size, buffer) {
  if (size >>> 0 !== size) throw new ERR_SOCKET_BAD_BUFFER_SIZE();

  const ctx = {};
  const ret = self[kStateSymbol].handle.bufferSize(size, buffer, ctx);
  if (ret === undefined) {
    throw new ERR_SOCKET_BUFFER_SIZE(ctx);
  }
  return ret;
}

// Query primary process to get the server handle and utilize it.
function bindServerHandle(self, options, errCb) {
  const cluster = lazyLoadCluster();

  const state = self[kStateSymbol];
  cluster._getServer(self, options, (err, handle) => {
    if (err) {
      // Do not call callback if socket is closed
      if (state.handle) {
        errCb(err);
      }
      return;
    }

    if (!state.handle) {
      // Handle has been closed in the mean time.
      return handle.close();
    }

    replaceHandle(self, handle);
    startListening(self);
  });
}

Socket.prototype.bind = function (port_, address_ /* , callback */) {
  let port = port_;

  healthCheck(this);
  const state = this[kStateSymbol];

  if (state.bindState !== BIND_STATE_UNBOUND)
    throw new ERR_SOCKET_ALREADY_BOUND();

  state.bindState = BIND_STATE_BINDING;

  const cb = arguments.length && arguments[arguments.length - 1];
  if (typeof cb === "function") {
    function removeListeners() {
      this.removeListener("error", removeListeners);
      this.removeListener("listening", onListening);
    }

    function onListening() {
      Function.prototype.call.call(removeListeners, this);
      Function.prototype.call.call(cb, this);
    }

    this.on("error", removeListeners);
    this.on("listening", onListening);
  }

  if (
    port !== null &&
    typeof port === "object" &&
    typeof port.recvStart === "function"
  ) {
    replaceHandle(this, port);
    startListening(this);
    return this;
  }

  // Open an existing fd instead of creating a new one.
  if (
    port !== null &&
    typeof port === "object" &&
    isInt32(port.fd) &&
    port.fd > 0
  ) {
    const fd = port.fd;
    const exclusive = !!port.exclusive;
    const state = this[kStateSymbol];

    const cluster = lazyLoadCluster();

    if (cluster.isWorker && !exclusive) {
      bindServerHandle(
        this,
        {
          address: null,
          port: null,
          addressType: this.type,
          fd,
          flags: null,
        },
        (err) => {
          // Callback to handle error.
          const ex = new ErrnoException(err, "open");
          state.bindState = BIND_STATE_UNBOUND;
          this.emit("error", ex);
        },
      );
      return this;
    }

    const type = guessHandleType(fd);
    if (type !== "UDP") throw new ERR_INVALID_FD_TYPE(type);
    const err = state.handle.open(fd);

    if (err) throw new ErrnoException(err, "open");

    startListening(this);
    return this;
  }

  let address;
  let exclusive;

  if (port !== null && typeof port === "object") {
    address = port.address || "";
    exclusive = !!port.exclusive;
    port = port.port;
  } else {
    address = typeof address_ === "function" ? "" : address_;
    exclusive = false;
  }

  // Defaulting address for bind to all interfaces
  if (!address) {
    if (this.type === "udp4") address = "0.0.0.0";
    else address = "::";
  }

  // Resolve address first
  state.handle.lookup(address, (err, ip) => {
    if (!state.handle) return; // Handle has been closed in the mean time

    if (err) {
      state.bindState = BIND_STATE_UNBOUND;
      this.emit("error", err);
      return;
    }

    const cluster = lazyLoadCluster();

    let flags = 0;
    if (state.reuseAddr) flags |= UV_UDP_REUSEADDR;
    if (state.ipv6Only) flags |= UV_UDP_IPV6ONLY;

    if (cluster.isWorker && !exclusive) {
      bindServerHandle(
        this,
        {
          address: ip,
          port: port,
          addressType: this.type,
          fd: -1,
          flags: flags,
        },
        (err) => {
          // Callback to handle error.
          const ex = new ExceptionWithHostPort(err, "bind", ip, port);
          state.bindState = BIND_STATE_UNBOUND;
          this.emit("error", ex);
        },
      );
    } else {
      const err = state.handle.bind(ip, port || 0, flags);
      if (err) {
        const ex = new ExceptionWithHostPort(err, "bind", ip, port);
        state.bindState = BIND_STATE_UNBOUND;
        this.emit("error", ex);
        // Todo: close?
        return;
      }

      startListening(this);
    }
  });

  return this;
};

Socket.prototype.connect = function (port, address, callback) {
  port = validatePort(port, "Port", false);
  if (typeof address === "function") {
    callback = address;
    address = "";
  } else if (address === undefined) {
    address = "";
  }

  validateString(address, "address");

  const state = this[kStateSymbol];

  if (state.connectState !== CONNECT_STATE_DISCONNECTED)
    throw new ERR_SOCKET_DGRAM_IS_CONNECTED();

  state.connectState = CONNECT_STATE_CONNECTING;
  if (state.bindState === BIND_STATE_UNBOUND)
    this.bind({ port: 0, exclusive: true }, null);

  if (state.bindState !== BIND_STATE_BOUND) {
    enqueue(
      this,
      Function.prototype.bind.call(_connect, this, port, address, callback),
    );
    return;
  }

  ReflectApply(_connect, this, [port, address, callback]);
};

function _connect(port, address, callback) {
  const state = this[kStateSymbol];
  if (callback) this.once("connect", callback);

  const afterDns = (ex, ip) => {
    defaultTriggerAsyncIdScope(
      this[async_id_symbol],
      doConnect,
      ex,
      this,
      ip,
      address,
      port,
      callback,
    );
  };

  state.handle.lookup(address, afterDns);
}

function doConnect(ex, self, ip, address, port, callback) {
  const state = self[kStateSymbol];
  if (!state.handle) return;

  if (!ex) {
    const err = state.handle.connect(ip, port);
    if (err) {
      ex = new ExceptionWithHostPort(err, "connect", address, port);
    }
  }

  if (ex) {
    state.connectState = CONNECT_STATE_DISCONNECTED;
    return process.nextTick(() => {
      if (callback) {
        self.removeListener("connect", callback);
        callback(ex);
      } else {
        self.emit("error", ex);
      }
    });
  }

  state.connectState = CONNECT_STATE_CONNECTED;
  process.nextTick(() => self.emit("connect"));
}

Socket.prototype.disconnect = function () {
  const state = this[kStateSymbol];
  if (state.connectState !== CONNECT_STATE_CONNECTED)
    throw new ERR_SOCKET_DGRAM_NOT_CONNECTED();

  const err = state.handle.disconnect();
  if (err) throw new ErrnoException(err, "connect");
  else state.connectState = CONNECT_STATE_DISCONNECTED;
};

// Thin wrapper around `send`, here for compatibility with dgram_legacy.js
Socket.prototype.sendto = function (
  buffer,
  offset,
  length,
  port,
  address,
  callback,
) {
  validateNumber(offset, "offset");
  validateNumber(length, "length");
  validateNumber(port, "port");
  validateString(address, "address");

  this.send(buffer, offset, length, port, address, callback);
};

function sliceBuffer(buffer, offset, length) {
  if (typeof buffer === "string") {
    buffer = Buffer.from(buffer);
  } else if (!isArrayBufferView(buffer)) {
    throw new ERR_INVALID_ARG_TYPE(
      "buffer",
      ["Buffer", "TypedArray", "DataView", "string"],
      buffer,
    );
  }

  offset = offset >>> 0;
  length = length >>> 0;
  if (offset > buffer.byteLength) {
    throw new ERR_BUFFER_OUT_OF_BOUNDS("offset");
  }

  if (offset + length > buffer.byteLength) {
    throw new ERR_BUFFER_OUT_OF_BOUNDS("length");
  }

  return Buffer.from(buffer.buffer, buffer.byteOffset + offset, length);
}

function fixBufferList(list) {
  const newlist = new Array(list.length);

  for (let i = 0, l = list.length; i < l; i++) {
    const buf = list[i];
    if (typeof buf === "string") newlist[i] = Buffer.from(buf);
    else if (!isArrayBufferView(buf)) return null;
    else newlist[i] = Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength);
  }

  return newlist;
}

function enqueue(self, toEnqueue) {
  const state = self[kStateSymbol];

  // If the send queue hasn't been initialized yet, do it, and install an
  // event handler that flushes the send queue after binding is done.
  if (state.queue === undefined) {
    state.queue = [];
    self.once(EventEmitter.errorMonitor, onListenError);
    self.once("listening", onListenSuccess);
  }
  Array.prototype.push.call(state.queue, toEnqueue);
}

function onListenSuccess() {
  this.removeListener(EventEmitter.errorMonitor, onListenError);
  Function.prototype.call.call(clearQueue, this);
}

function onListenError(err) {
  this.removeListener("listening", onListenSuccess);
  this[kStateSymbol].queue = undefined;
}

function clearQueue() {
  const state = this[kStateSymbol];
  const queue = state.queue;
  state.queue = undefined;

  // Flush the send queue.
  for (const queueEntry of queue) queueEntry();
}

// valid combinations
// For connectionless sockets
// send(buffer, offset, length, port, address, callback)
// send(buffer, offset, length, port, address)
// send(buffer, offset, length, port, callback)
// send(buffer, offset, length, port)
// send(bufferOrList, port, address, callback)
// send(bufferOrList, port, address)
// send(bufferOrList, port, callback)
// send(bufferOrList, port)
// For connected sockets
// send(buffer, offset, length, callback)
// send(buffer, offset, length)
// send(bufferOrList, callback)
// send(bufferOrList)
Socket.prototype.send = function (
  buffer,
  offset,
  length,
  port,
  address,
  callback,
) {
  let list;
  const state = this[kStateSymbol];
  const connected = state.connectState === CONNECT_STATE_CONNECTED;
  if (!connected) {
    if (address || (port && typeof port !== "function")) {
      buffer = sliceBuffer(buffer, offset, length);
    } else {
      callback = port;
      port = offset;
      address = length;
    }
  } else {
    if (typeof length === "number") {
      buffer = sliceBuffer(buffer, offset, length);
      if (typeof port === "function") {
        callback = port;
        port = null;
      }
    } else {
      callback = offset;
    }

    if (port || address) throw new ERR_SOCKET_DGRAM_IS_CONNECTED();
  }

  if (!Array.isArray(buffer)) {
    if (typeof buffer === "string") {
      list = [Buffer.from(buffer)];
    } else if (!isArrayBufferView(buffer)) {
      throw new ERR_INVALID_ARG_TYPE(
        "buffer",
        ["Buffer", "TypedArray", "DataView", "string"],
        buffer,
      );
    } else {
      list = [buffer];
    }
  } else if (!(list = fixBufferList(buffer))) {
    throw new ERR_INVALID_ARG_TYPE(
      "buffer list arguments",
      ["Buffer", "TypedArray", "DataView", "string"],
      buffer,
    );
  }

  if (!connected) port = validatePort(port, "Port", false);

  // Normalize callback so it's either a function or undefined but not anything
  // else.
  if (typeof callback !== "function") callback = undefined;

  if (typeof address === "function") {
    callback = address;
    address = undefined;
  } else if (address != null) {
    validateString(address, "address");
  }

  healthCheck(this);

  if (state.bindState === BIND_STATE_UNBOUND)
    this.bind({ port: 0, exclusive: true }, null);

  if (list.length === 0) Array.prototype.push.call(list, Buffer.alloc(0));

  // If the socket hasn't been bound yet, push the outbound packet onto the
  // send queue and send after binding is complete.
  if (state.bindState !== BIND_STATE_BOUND) {
    enqueue(
      this,
      Function.prototype.bind.call(
        this.send,
        this,
        list,
        port,
        address,
        callback,
      ),
    );
    return;
  }

  const afterDns = (ex, ip) => {
    defaultTriggerAsyncIdScope(
      this[async_id_symbol],
      doSend,
      ex,
      this,
      ip,
      list,
      address,
      port,
      callback,
    );
  };

  if (!connected) {
    state.handle.lookup(address, afterDns);
  } else {
    afterDns(null, null);
  }
};

function doSend(ex, self, ip, list, address, port, callback) {
  const state = self[kStateSymbol];

  if (ex) {
    if (typeof callback === "function") {
      process.nextTick(callback, ex);
      return;
    }

    process.nextTick(() => self.emit("error", ex));
    return;
  } else if (!state.handle) {
    return;
  }

  const req = new SendWrap();
  req.list = list; // Keep reference alive.
  req.address = address;
  req.port = port;
  if (callback) {
    req.callback = callback;
    req.oncomplete = afterSend;
  }

  let err;
  if (port)
    err = state.handle.send(req, list, list.length, port, ip, !!callback);
  else err = state.handle.send(req, list, list.length, !!callback);

  if (err >= 1) {
    // Synchronous finish. The return code is msg_length + 1 so that we can
    // distinguish between synchronous success and asynchronous success.
    if (callback) process.nextTick(callback, null, err - 1);
    return;
  }

  if (err && callback) {
    // Don't emit as error, dgram_legacy.js compatibility
    const ex = new ExceptionWithHostPort(err, "send", address, port);
    process.nextTick(callback, ex);
  }
}

function afterSend(err, sent) {
  if (err) {
    err = new ExceptionWithHostPort(err, "send", this.address, this.port);
  } else {
    err = null;
  }

  this.callback(err, sent);
}

Socket.prototype.close = function (callback) {
  const state = this[kStateSymbol];
  const queue = state.queue;

  if (typeof callback === "function") this.on("close", callback);

  if (queue !== undefined) {
    Array.prototype.push.call(
      queue,
      Function.prototype.bind.call(this.close, this),
    );
    return this;
  }

  healthCheck(this);
  stopReceiving(this);
  state.handle.close();
  state.handle = null;
  defaultTriggerAsyncIdScope(
    this[async_id_symbol],
    process.nextTick,
    socketCloseNT,
    this,
  );

  return this;
};

Socket.prototype[Symbol.for("nodejs.asyncDispose")] = async function () {
  if (!this[kStateSymbol].handle) {
    return;
  }
  return Function.prototype.call.call(promisify(this.close), this);
};

function socketCloseNT(self) {
  self.emit("close");
}

Socket.prototype.address = function () {
  healthCheck(this);

  const out = {};
  const err = this[kStateSymbol].handle.getsockname(out);
  if (err) {
    throw new ErrnoException(err, "getsockname");
  }

  return out;
};

Socket.prototype.remoteAddress = function () {
  healthCheck(this);

  const state = this[kStateSymbol];
  if (state.connectState !== CONNECT_STATE_CONNECTED)
    throw new ERR_SOCKET_DGRAM_NOT_CONNECTED();

  const out = {};
  const err = state.handle.getpeername(out);
  if (err) throw new ErrnoException(err, "getpeername");

  return out;
};

Socket.prototype.setBroadcast = function (arg) {
  const err = this[kStateSymbol].handle.setBroadcast(arg ? 1 : 0);
  if (err) {
    throw new ErrnoException(err, "setBroadcast");
  }
};

Socket.prototype.setTTL = function (ttl) {
  validateNumber(ttl, "ttl");

  const err = this[kStateSymbol].handle.setTTL(ttl);
  if (err) {
    throw new ErrnoException(err, "setTTL");
  }

  return ttl;
};

Socket.prototype.setMulticastTTL = function (ttl) {
  validateNumber(ttl, "ttl");

  const err = this[kStateSymbol].handle.setMulticastTTL(ttl);
  if (err) {
    throw new ErrnoException(err, "setMulticastTTL");
  }

  return ttl;
};

Socket.prototype.setMulticastLoopback = function (arg) {
  const err = this[kStateSymbol].handle.setMulticastLoopback(arg ? 1 : 0);
  if (err) {
    throw new ErrnoException(err, "setMulticastLoopback");
  }

  return arg; // 0.4 compatibility
};

Socket.prototype.setMulticastInterface = function (interfaceAddress) {
  healthCheck(this);
  validateString(interfaceAddress, "interfaceAddress");

  const err = this[kStateSymbol].handle.setMulticastInterface(interfaceAddress);
  if (err) {
    throw new ErrnoException(err, "setMulticastInterface");
  }
};

Socket.prototype.addMembership = function (multicastAddress, interfaceAddress) {
  healthCheck(this);

  if (!multicastAddress) {
    throw new ERR_MISSING_ARGS("multicastAddress");
  }

  const { handle } = this[kStateSymbol];
  const err = handle.addMembership(multicastAddress, interfaceAddress);
  if (err) {
    throw new ErrnoException(err, "addMembership");
  }
};

Socket.prototype.dropMembership = function (
  multicastAddress,
  interfaceAddress,
) {
  healthCheck(this);

  if (!multicastAddress) {
    throw new ERR_MISSING_ARGS("multicastAddress");
  }

  const { handle } = this[kStateSymbol];
  const err = handle.dropMembership(multicastAddress, interfaceAddress);
  if (err) {
    throw new ErrnoException(err, "dropMembership");
  }
};

Socket.prototype.addSourceSpecificMembership = function (
  sourceAddress,
  groupAddress,
  interfaceAddress,
) {
  healthCheck(this);

  validateString(sourceAddress, "sourceAddress");
  validateString(groupAddress, "groupAddress");

  const err = this[kStateSymbol].handle.addSourceSpecificMembership(
    sourceAddress,
    groupAddress,
    interfaceAddress,
  );
  if (err) {
    throw new ErrnoException(err, "addSourceSpecificMembership");
  }
};

Socket.prototype.dropSourceSpecificMembership = function (
  sourceAddress,
  groupAddress,
  interfaceAddress,
) {
  healthCheck(this);

  validateString(sourceAddress, "sourceAddress");
  validateString(groupAddress, "groupAddress");

  const err = this[kStateSymbol].handle.dropSourceSpecificMembership(
    sourceAddress,
    groupAddress,
    interfaceAddress,
  );
  if (err) {
    throw new ErrnoException(err, "dropSourceSpecificMembership");
  }
};

function healthCheck(socket) {
  if (!socket[kStateSymbol].handle) {
    // Error message from dgram_legacy.js.
    throw new ERR_SOCKET_DGRAM_NOT_RUNNING();
  }
}

function stopReceiving(socket) {
  const state = socket[kStateSymbol];

  if (!state.receiving) return;

  state.handle.recvStop();
  state.receiving = false;
}

function onMessage(nread, handle, buf, rinfo) {
  const self = handle[owner_symbol];
  if (nread < 0) {
    return self.emit("error", new ErrnoException(nread, "recvmsg"));
  }
  rinfo.size = buf.length; // compatibility
  self.emit("message", buf, rinfo);
}

function onError(nread, handle, error) {
  const self = handle[owner_symbol];
  return self.emit("error", error);
}

Socket.prototype.ref = function () {
  const handle = this[kStateSymbol].handle;

  if (handle) handle.ref();

  return this;
};

Socket.prototype.unref = function () {
  const handle = this[kStateSymbol].handle;

  if (handle) handle.unref();

  return this;
};

Socket.prototype.setRecvBufferSize = function (size) {
  bufferSize(this, size, RECV_BUFFER);
};

Socket.prototype.setSendBufferSize = function (size) {
  bufferSize(this, size, SEND_BUFFER);
};

Socket.prototype.getRecvBufferSize = function () {
  return bufferSize(this, 0, RECV_BUFFER);
};

Socket.prototype.getSendBufferSize = function () {
  return bufferSize(this, 0, SEND_BUFFER);
};

Socket.prototype.getSendQueueSize = function () {
  return this[kStateSymbol].handle.getSendQueueSize();
};

Socket.prototype.getSendQueueCount = function () {
  return this[kStateSymbol].handle.getSendQueueCount();
};

// Deprecated private APIs.
Object.defineProperty(Socket.prototype, "_handle", {
  __proto__: null,
  get: deprecate(
    function () {
      return this[kStateSymbol].handle;
    },
    "Socket.prototype._handle is deprecated",
    "DEP0112",
  ),
  set: deprecate(
    function (val) {
      this[kStateSymbol].handle = val;
    },
    "Socket.prototype._handle is deprecated",
    "DEP0112",
  ),
});

Object.defineProperty(Socket.prototype, "_receiving", {
  __proto__: null,
  get: deprecate(
    function () {
      return this[kStateSymbol].receiving;
    },
    "Socket.prototype._receiving is deprecated",
    "DEP0112",
  ),
  set: deprecate(
    function (val) {
      this[kStateSymbol].receiving = val;
    },
    "Socket.prototype._receiving is deprecated",
    "DEP0112",
  ),
});

Object.defineProperty(Socket.prototype, "_bindState", {
  __proto__: null,
  get: deprecate(
    function () {
      return this[kStateSymbol].bindState;
    },
    "Socket.prototype._bindState is deprecated",
    "DEP0112",
  ),
  set: deprecate(
    function (val) {
      this[kStateSymbol].bindState = val;
    },
    "Socket.prototype._bindState is deprecated",
    "DEP0112",
  ),
});

Object.defineProperty(Socket.prototype, "_queue", {
  __proto__: null,
  get: deprecate(
    function () {
      return this[kStateSymbol].queue;
    },
    "Socket.prototype._queue is deprecated",
    "DEP0112",
  ),
  set: deprecate(
    function (val) {
      this[kStateSymbol].queue = val;
    },
    "Socket.prototype._queue is deprecated",
    "DEP0112",
  ),
});

Object.defineProperty(Socket.prototype, "_reuseAddr", {
  __proto__: null,
  get: deprecate(
    function () {
      return this[kStateSymbol].reuseAddr;
    },
    "Socket.prototype._reuseAddr is deprecated",
    "DEP0112",
  ),
  set: deprecate(
    function (val) {
      this[kStateSymbol].reuseAddr = val;
    },
    "Socket.prototype._reuseAddr is deprecated",
    "DEP0112",
  ),
});

Socket.prototype._healthCheck = deprecate(
  function () {
    healthCheck(this);
  },
  "Socket.prototype._healthCheck() is deprecated",
  "DEP0112",
);

Socket.prototype._stopReceiving = deprecate(
  function () {
    stopReceiving(this);
  },
  "Socket.prototype._stopReceiving() is deprecated",
  "DEP0112",
);

// Legacy alias on the C++ wrapper object. This is not public API, so we may
// want to runtime-deprecate it at some point. There's no hurry, though.
Object.defineProperty(UDP.prototype, "owner", {
  __proto__: null,
  get() {
    return this[owner_symbol];
  },
  set(v) {
    return (this[owner_symbol] = v);
  },
});

const _export__createSocketHandle_ = deprecate(
  _createSocketHandle,
  "dgram._createSocketHandle() is deprecated",
  "DEP0112",
);
export { _export__createSocketHandle_ as _createSocketHandle };
export { createSocket };
export { Socket };