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Modify DNS for Optus supplied Huawei B315 4G modem

The Huawei B315 modem supplied by Optus for the (now defunt) Vividwireless service is a workable but sadly rather crippled device, even down to the inability to modify assigned DNS servers from it's DHCP server away from Optus DNS to something sane (Google DNS/Cloudflare/etc.).

This script should allow for the easy update of assigned DNS servers and has been tested with Google Chrome.

Usage

Log into router web UI (e.g. http://192.168.0.1).
From the same browser session, open the "web developer tools" pane.

	import Foundation
	import CoreTelephony

	struct PhoneHelper {
	static func getCountryCode() -> String {
	guard let carrier = CTTelephonyNetworkInfo().subscriberCellularProvider, let countryCode = carrier.isoCountryCode else { return "+" }
	let prefixCodes = ["AF": "93", "AE": "971", "AL": "355", "AN": "599", "AS":"1", "AD": "376", "AO": "244", "AI": "1", "AG":"1", "AR": "54","AM": "374", "AW": "297", "AU":"61", "AT": "43","AZ": "994", "BS": "1", "BH":"973", "BF": "226","BI": "257", "BD": "880", "BB": "1", "BY": "375", "BE":"32","BZ": "501", "BJ": "229", "BM": "1", "BT":"975", "BA": "387", "BW": "267", "BR": "55", "BG": "359", "BO": "591", "BL": "590", "BN": "673", "CC": "61", "CD":"243","CI": "225", "KH":"855", "CM": "237", "CA": "1", "CV": "238", "KY":"345", "CF":"236", "CH": "41", "CL": "56", "CN":"86","CX": "61", "CO": "57", "KM": "269", "CG":"242", "CK": "682", "CR": "506", "CU":"53", "CY":"537","CZ": "420", "DE": "49", "DK": "45", "DJ":"253", "DM": "1", "DO": "1", "DZ": "213", "EC": "593"

	#include<stdio.h>
	#include<stdlib.h>

	struct node //make node for linked list using structure
	{
	int value; //value part of node contains the element
	struct node *next; //the next part of node contains the address of next element of list
	};

	struct node *head; //contains the address of first element of linked list


	#include <windows.h>
	#include <mmdeviceapi.h>
	#include <audioclient.h>

	#include <assert.h>
	#define _USE_MATH_DEFINES
	#include <math.h> // for sin()
	#include <stdint.h>

	//How to edit a user profile on the front end?
	//http://wordpress.stackexchange.com/questions/9775/how-to-edit-a-user-profile-on-the-front-end

	//Forcing nickname as display_name in custom edit profile template
	//http://wordpress.stackexchange.com/questions/35403/forcing-nickname-as-display-name-in-custom-edit-profile-template


	///////

	<?php

	# -- coding: utf-8 --
	from django.conf import settings
	from django.core.files.storage import FileSystemStorage
	from django.db import models

	class OverwriteStorage(FileSystemStorage):
	'''
	Muda o comportamento padrão do Django e o faz sobrescrever arquivos de
	mesmo nome que foram carregados pelo usuário ao invés de renomeá-los.
	'''

	// from https://kelvinzhang.com/playground/scroll-area

	import { CSSProperties, useCallback, useEffect, useRef, useState } from "react";
	import styled from 'styled-components';

	type ScrollAreaProps = {
	children: React.ReactNode;
	showOverflowIndicator?: boolean;
	hideScrollbar?: boolean;
	indicatorColor?: CSSProperties["background"];

	{
	"⤡": "⤡",
	"⊞": "⊞",
	"×": "×",
	"❮": "❮",
	"❯": "❯",
	"Loading...": "加载中...",
	"Waiting...": "等待中...",
	"In queue...": "队列中...",
	"@@/^Waiting (.*)$/": "等待中 $1",