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std/node/internal/dgram.ts

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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// 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.
import { lookup as defaultLookup } from "../dns.ts";import { isInt32, validateFunction } from "./validators.mjs";import type { ErrnoException } from "./errors.ts";import { ERR_SOCKET_BAD_TYPE } from "./errors.ts";import { UDP } from "../internal_binding/udp_wrap.ts";import { guessHandleType } from "../internal_binding/util.ts";import { codeMap } from "../internal_binding/uv.ts";
export type SocketType = "udp4" | "udp6";
export const kStateSymbol: unique symbol = Symbol("kStateSymbol");
function lookup4( lookup: typeof defaultLookup, address: string, callback: ( err: ErrnoException | null, address: string, family: number, ) => void,) { return lookup(address || "127.0.0.1", 4, callback);}
function lookup6( lookup: typeof defaultLookup, address: string, callback: ( err: ErrnoException | null, address: string, family: number, ) => void,) { return lookup(address || "::1", 6, callback);}
export function newHandle( type: SocketType, lookup?: typeof defaultLookup,): UDP { if (lookup === undefined) { lookup = defaultLookup; } else { validateFunction(lookup, "lookup"); }
if (type === "udp4") { const handle = new UDP();
handle.lookup = lookup4.bind(handle, lookup);
return handle; }
if (type === "udp6") { const handle = new UDP();
handle.lookup = lookup6.bind(handle, lookup); handle.bind = handle.bind6; handle.connect = handle.connect6; handle.send = handle.send6;
return handle; }
throw new ERR_SOCKET_BAD_TYPE();}
export function _createSocketHandle( address: string, port: number, addressType: SocketType, fd: number, flags: number,) { const handle = newHandle(addressType); let err;
if (isInt32(fd) && fd > 0) { const type = guessHandleType(fd);
if (type !== "UDP") { err = codeMap.get("EINVAL")!; } else { err = handle.open(fd); } } else if (port || address) { err = handle.bind(address, port || 0, flags); }
if (err) { handle.close();
return err; }
return handle;}
export default { kStateSymbol, newHandle, _createSocketHandle,};