first

.dockerignore

+# compiled output
+/dist
+/node_modules
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# OS
+.DS_Store
+
+# Tests
+/coverage
+/.nyc_output
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+
+/data
+/output
+/config.yaml
+
+.git*
+Dockerfile
+.dockerignore
+/tests

.eslintignore

+webpack.config.js
+dist/*
+build/*
+*.js

.eslintrc.js

+module.exports = {
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    project: 'tsconfig.json',
+    tsconfigRootDir : __dirname, 
+    sourceType: 'module',
+  },
+  plugins: ['@typescript-eslint/eslint-plugin'],
+  extends: [
+    'plugin:@typescript-eslint/recommended',
+    'plugin:prettier/recommended',
+  ],
+  root: true,
+  env: {
+    node: true,
+    jest: true,
+  },
+  ignorePatterns: ['.eslintrc.js'],
+  rules: {
+    '@typescript-eslint/interface-name-prefix': 'off',
+    '@typescript-eslint/explicit-function-return-type': 'off',
+    '@typescript-eslint/explicit-module-boundary-types': 'off',
+    '@typescript-eslint/no-explicit-any': 'off',
+  },
+};

.gitignore

+# compiled output
+/dist
+/node_modules
+
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# OS
+.DS_Store
+
+# Tests
+/coverage
+/.nyc_output
+
+# IDEs and editors
+/.idea
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+
+# IDE - VSCode
+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+
+/data
+/output
+/config.yaml

.gitlab-ci.yml

+stages:
+  - build
+  - deploy
+variables:
+  GIT_DEPTH: "1"
+
+before_script:
+  - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+
+.build-image:
+  stage: build
+  script:
+    - docker build --pull -t $TARGET_IMAGE .
+    - docker push $TARGET_IMAGE
+
+build-x86:
+  extends: .build-image
+  tags:
+    - docker
+  variables:
+    TARGET_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-x86
+
+build-arm:
+  extends: .build-image
+  tags:
+    - docker-arm
+  variables:
+    TARGET_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-arm
+
+.deploy:
+  stage: deploy
+  tags:
+    - docker
+  script:
+    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-x86
+    - docker pull $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-arm
+    - docker manifest create $TARGET_IMAGE --amend $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-x86 --amend
+      $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG-arm
+    - docker manifest push $TARGET_IMAGE
+
+deploy_latest:
+  extends: .deploy
+  variables:
+    TARGET_IMAGE: $CI_REGISTRY_IMAGE:latest
+  only:
+    - master
+
+deploy_branch:
+  extends: .deploy
+  variables:
+    TARGET_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG

.npmignore

+/install-npm.sh
+.git*
+/data
+/output
+/config.yaml
+.idea
+.dockerignore
+Dockerfile
+/src
+/coverage
+/tests
+/dist/tests

.prettierrc

+{
+  "singleQuote": true,
+  "trailingComma": "all"
+}
\ No newline at end of file

Dockerfile

+FROM node:lts-bullseye-slim as base
+LABEL Author="Nanahira <nanahira@momobako.com>"
+
+RUN apt update && apt -y install python3 build-essential && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* /var/log/*
+WORKDIR /usr/src/app
+COPY ./package*.json ./
+
+FROM base as builder
+RUN npm ci && npm cache clean --force
+COPY . ./
+RUN npm run build
+
+FROM base
+ENV NODE_ENV production
+RUN npm ci && npm cache clean --force
+COPY --from=builder /usr/src/app/dist ./dist
+
+CMD [ "npm", "start" ]

LICENSE

+The MIT License (MIT)
+
+Copyright (c) 2021 Nanahira
+
+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.
+

index.ts

+import { createProxyServer } from '@mutagen-d/node-proxy-server';
+import { Server, createConnection } from 'net';
+import { hashAddress } from './src/hash-address';
+
+declare module 'net' {
+  interface Server {
+    on(
+      event: 'proxy-auth',
+      listener: (
+        socket: Socket,
+        username: string,
+        password: string,
+        callback: (success: boolean) => void,
+      ) => void,
+    ): this;
+  }
+}
+
+const targetIpSym = Symbol('targetIp');
+
+const server: Server = createProxyServer({
+  auth: true,
+  createProxyConnection: async (info) => {
+    const socket = createConnection({
+      host: info.dstHost,
+      port: info.dstPort,
+      localAddress: info.socket[targetIpSym] || undefined,
+    });
+    return new Promise((resolve, reject) => {
+      socket.on('connect', () => resolve(socket));
+      socket.on('error', (error) => reject(error));
+    });
+  },
+});
+
+server.on('proxy-auth', (socket, username, password, callback) => {
+  if (!username && !password) {
+    callback(true);
+    return;
+  }
+  const token = `${username}:${password}`;
+  socket[targetIpSym] = hashAddress(process.env.CIDR, token).toString();
+  console.log(`Mapped ${token} to ${socket[targetIpSym]}`);
+  callback(true);
+});
+
+const port = parseInt(process.env.PORT || '8080');
+server.listen(port, process.env.HOST || '0.0.0.0', () =>
+  console.log(`Listening on port ${port}`),
+);

package.json

+{
+  "name": "ipv6-proxy-switcher",
+  "description": "ipv6-proxy-switcher-desc",
+  "version": "1.0.0",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "scripts": {
+    "lint": "eslint --fix .",
+    "patch": "sed -i -e \"s/server.emit('proxy-auth', user/server.emit('proxy-auth', socket, user/g\" -e \"s/server.emit('proxy-auth', ''/server.emit('proxy-auth', socket, ''/g\" -e \"s/await createProxyConnection({ srcHost, srcPort/await createProxyConnection({ socket, srcHost, srcPort/g\" -e \"s/await createProxyConnection({ dstHost, dstPort/await createProxyConnection({ socket, dstHost, dstPort/g\" ./node_modules/@mutagen-d/node-proxy-server/src/index.js",
+    "build": "rimraf dist && npm run patch && tsc",
+    "test": "jest --passWithNoTests",
+    "start": "node dist/index.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://code.mycard.moe/mycard/ipv6-proxy-switcher.git"
+  },
+  "author": "Nanahira <nanahira@momobako.com>",
+  "license": "MIT",
+  "keywords": [],
+  "bugs": {
+    "url": "https://code.mycard.moe/mycard/ipv6-proxy-switcher/issues"
+  },
+  "homepage": "https://code.mycard.moe/mycard/ipv6-proxy-switcher",
+  "jest": {
+    "moduleFileExtensions": [
+      "js",
+      "json",
+      "ts"
+    ],
+    "rootDir": "tests",
+    "testRegex": ".*\\.spec\\.ts$",
+    "transform": {
+      "^.+\\.(t|j)s$": "ts-jest"
+    },
+    "collectCoverageFrom": [
+      "**/*.(t|j)s"
+    ],
+    "coverageDirectory": "../coverage",
+    "testEnvironment": "node"
+  },
+  "devDependencies": {
+    "@types/jest": "^29.5.0",
+    "@types/node": "^18.15.11",
+    "@typescript-eslint/eslint-plugin": "^5.58.0",
+    "@typescript-eslint/parser": "^5.58.0",
+    "eslint": "8.22.0",
+    "eslint-config-prettier": "^8.8.0",
+    "eslint-plugin-prettier": "^4.2.1",
+    "jest": "^29.5.0",
+    "prettier": "^2.8.7",
+    "rimraf": "^5.0.0",
+    "ts-jest": "^29.1.0",
+    "typescript": "^5.0.4"
+  },
+  "dependencies": {
+    "@mutagen-d/node-proxy-server": "^1.0.2",
+    "@stdlib/random-base-mt19937": "^0.0.6",
+    "ipaddr.js": "^2.0.1"
+  }
+}

src/hash-address.ts

+import mt19937 from '@stdlib/random-base-mt19937';
+import ip from 'ipaddr.js';
+
+export function hashAddress(cidr: string, token: string) {
+  const [range, prefixLength] = ip.parseCIDR(cidr);
+  const rand = mt19937.factory({
+    seed: Buffer.from(token || 'default', 'utf-8').toJSON().data,
+  });
+  let remaining = (range.kind() === 'ipv6' ? 128 : 32) - prefixLength;
+  const buffer = range.toByteArray();
+  for (let i = buffer.length - 1; i >= 0; i--) {
+    if (remaining < 8) {
+      const lastPart = (buffer[i] >> remaining) << remaining;
+      const randomPart = rand() % (1 << (1 + remaining));
+      buffer[i] = lastPart | randomPart;
+      break;
+    }
+    buffer[i] = rand() % 256;
+    remaining -= 8;
+  }
+  return ip.fromByteArray(buffer);
+}

tests/sample.spec.ts

+describe('Sample test.', () => {
+  it('should pass', () => {
+    expect(true).toBe(true);
+  });
+});

tsconfig.json

+{
+	"compilerOptions": {
+		"outDir": "dist",
+		"module": "commonjs",
+		"target": "es2021",
+		"esModuleInterop": true,
+		"emitDecoratorMetadata": true,
+		"experimentalDecorators": true,
+		"declaration": true,
+		"sourceMap": true,
+		"skipLibCheck": true
+	},
+	"compileOnSave": true,
+	"allowJs": true,
+	"include": [
+		"*.ts",
+		"src/**/*.ts",
+		"test/**/*.ts",
+		"tests/**/*.ts"
+	]
+}