- Sun Jun 21, 2015 7:45 pm
#21162
Ok, so I have tried various variations and none seem to work
I used a modified version of this package as suggested (even added some Serial.print)
https://github.com/esp8266/Arduino/tree ... /DNSServer
And also other version of DNS server, like in ethernet package. All seem to reply, but none seem to make the device think it is resolved correctly.
Both webserver and dnsserver seems to work in parallel, but like I said the DNS response is not accepted.
My ino, in case someone wants to have a look
Modified DNSserver.ccp
Any suggestions
I used a modified version of this package as suggested (even added some Serial.print)
https://github.com/esp8266/Arduino/tree ... /DNSServer
And also other version of DNS server, like in ethernet package. All seem to reply, but none seem to make the device think it is resolved correctly.
Both webserver and dnsserver seems to work in parallel, but like I said the DNS response is not accepted.
My ino, in case someone wants to have a look
Code: Select all
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <DNSServer.h>
const char* ssid = "esp8266";
boolean LEDstate[] = {LOW, false, LOW};
const byte DNS_PORT = 53;
IPAddress apIP(192, 168, 1, 1);
const char* html = "<html><head><style>.bt{display:block;width:250px;height:100px;padding:10px;margin:10px;"
"text-align:center;border-radius:5px;color:white;font-weight:bold;font-size:70px;text-decoration:none;} "
"body{background:#000;} .r{background:#933;} .g{background:#363;} .y{background:#EE0;height:100px;"
"width:100px;border-radius:50px;} .b{background:#000;height:100px;width:100px;border-radius:50px;} "
".a{font-size:35px;} td{vertical-align:middle;}</style>"
"</head><body><table><tr><td><div class='TGT0'></div></td><td><a class='bt g' href='/L0?v=1'>ON</a></td>"
"<td><a class='bt r' href='/L0?v=0'>OFF</a></td></tr><tr><td><div class='TGT2'></div></td><td>"
"<a class='bt g' href='/L2?v=1'>ON</a></td><td><a class='bt r' href='/L2?v=0'>OFF</a></td></tr>"
"<tr><td> </td><td><a class='bt g a' href='/ALL?v=1'><br/>ALL ON</a></td><td>"
"<a class='bt r a' href='/ALL?v=0'><br/>ALL OFF</a></td></tr></body></html>";
ESP8266WebServer server(80);
DNSServer dnsServer;
void setup() {
pinMode(0, OUTPUT);
pinMode(2, OUTPUT);
digitalWrite(2, LEDstate[0]);
digitalWrite(2, LEDstate[2]);
Serial.begin(115200);
WiFi.mode(WIFI_AP);
WiFi.softAPConfig(apIP,apIP,IPAddress(255,255,255,0));
WiFi.softAP(ssid);//, password);
Serial.print("\n\r \n\rWorking to connect");
Serial.println("");
Serial.print("AP is ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.softAPIP());
server.on("/", handle_root);
server.on("/L0", handle_L0);
server.on("/L2", handle_L2);
server.on("/ALL", handle_ALL);
server.begin();
Serial.println("HTTP server started");
dnsServer.setTTL(300);
dnsServer.setErrorReplyCode(DNSReplyCode::ServerFailure);
dnsServer.start(DNS_PORT, "www.example.com", apIP);
Serial.println("USP Server started");
}
void loop() {
server.handleClient();
dnsServer.processNextRequest();
}
void handle_root() {
Serial.println("Page served");
String toSend = html;
toSend.replace("TGT0", LEDstate[0] ? "y" : "b");
toSend.replace("TGT2", LEDstate[2] ? "y" : "b");
server.send(200, "text/html", toSend);
delay(100);
}
void handle_L0() {
change_states(0);
handle_root();
}
void handle_L2() {
change_states(2);
handle_root();
}
void handle_ALL() {
change_states(0);
change_states(2);
handle_root();
}
void change_states(int tgt) {
if (server.hasArg("v")) {
int state = server.arg("v").toInt() == 1;
Serial.print("LED");
Serial.print(tgt);
Serial.print("=");
Serial.println(state);
LEDstate[tgt] = state ? HIGH : LOW;
digitalWrite(tgt, LEDstate[tgt]);
}
}Modified DNSserver.ccp
Code: Select all
#include "DNSServer.h"
#include <lwip/def.h>
#include <Arduino.h>
DNSServer::DNSServer()
{
_ttl = htonl(60);
_errorReplyCode = DNSReplyCode::NonExistentDomain;
}
bool DNSServer::start(const uint16_t &port, const String &domainName,
const IPAddress &resolvedIP)
{
_port = port;
_domainName = domainName;
_resolvedIP[0] = resolvedIP[0];
_resolvedIP[1] = resolvedIP[1];
_resolvedIP[2] = resolvedIP[2];
_resolvedIP[3] = resolvedIP[3];
downcaseAndRemoveWwwPrefix(_domainName);
return _udp.begin(_port) == 1;
}
void DNSServer::setErrorReplyCode(const DNSReplyCode &replyCode)
{
_errorReplyCode = replyCode;
}
void DNSServer::setTTL(const uint32_t &ttl)
{
_ttl = htonl(ttl);
}
void DNSServer::stop()
{
_udp.stop();
}
void DNSServer::downcaseAndRemoveWwwPrefix(String &domainName)
{
domainName.toLowerCase();
domainName.replace("www.", "");
}
void DNSServer::processNextRequest()
{
_currentPacketSize = _udp.parsePacket();
if (_currentPacketSize)
{
_buffer = (unsigned char*)malloc(_currentPacketSize * sizeof(char));
_udp.read(_buffer, _currentPacketSize);
_dnsHeader = (DNSHeader*) _buffer;
if (_dnsHeader->QR == DNS_QR_QUERY &&
_dnsHeader->OPCode == DNS_OPCODE_QUERY &&
requestIncludesOnlyOneQuestion())// &&
//getDomainNameWithoutWwwPrefix() == _domainName)
{
replyWithIP();
}
else if (_dnsHeader->QR == DNS_QR_QUERY)
{
replyWithCustomCode();
}
free(_buffer);
}
}
bool DNSServer::requestIncludesOnlyOneQuestion()
{
return ntohs(_dnsHeader->QDCount) == 1 &&
_dnsHeader->ANCount == 0 &&
_dnsHeader->NSCount == 0 &&
_dnsHeader->ARCount == 0;
}
String DNSServer::getDomainNameWithoutWwwPrefix()
{
String parsedDomainName = "";
unsigned char *start = _buffer + 12;
if (*start == 0)
{
return parsedDomainName;
}
int pos = 0;
while(true)
{
unsigned char labelLength = *(start + pos);
for(int i = 0; i < labelLength; i++)
{
pos++;
parsedDomainName += (char)*(start + pos);
}
pos++;
if (*(start + pos) == 0)
{
downcaseAndRemoveWwwPrefix(parsedDomainName);
return parsedDomainName;
}
else
{
parsedDomainName += ".";
}
}
}
void DNSServer::replyWithIP()
{
Serial.print("Replying IP ");
Serial.print(_resolvedIP[0]);
Serial.print(".");
Serial.print(_resolvedIP[1]);
Serial.print(".");
Serial.print(_resolvedIP[2]);
Serial.print(".");
Serial.println(_resolvedIP[3]);
_dnsHeader->QR = DNS_QR_RESPONSE;
_dnsHeader->ANCount = _dnsHeader->QDCount;
_dnsHeader->QDCount = 0;
_udp.beginPacket(_udp.remoteIP(), _udp.remotePort());
_udp.write(_buffer, _currentPacketSize);
_udp.write((unsigned char*)&_ttl, 4);
// Length of RData is 4 bytes (because, in this case, RData is IPv4)
_udp.write((uint8_t)0);
_udp.write((uint8_t)4);
_udp.write(_resolvedIP, sizeof(_resolvedIP));
_udp.endPacket();
}
void DNSServer::replyWithCustomCode()
{
_dnsHeader->QR = DNS_QR_RESPONSE;
_dnsHeader->RCode = (unsigned char)_errorReplyCode;
_dnsHeader->QDCount = 0;
_udp.beginPacket(_udp.remoteIP(), _udp.remotePort());
_udp.write(_buffer, sizeof(DNSHeader));
_udp.endPacket();
}
Any suggestions
