IPv6 readiness and support "by default"

[nuclearcat]

Related area

tcp/ip stack

Hardware specification

any

Is your feature request related to a problem?

IPv6 support for IoT

Describe the solution you'd like

I want to create issue where i can track esp32 ipv6 readiness, ask questions regarding code and propose patches. First question i have: libraries/WiFi/src/WiFiGeneric.cpp function esp_err_t WiFiGenericClass::_eventCallback(arduino_event_t *event) event ARDUINO_EVENT_WIFI_STA_CONNECTED any particular reason why this line commented? esp_netif_create_ip6_linklocal(esp_netifs[ESP_IF_WIFI_STA]); Having it uncommented brings at least local IPv6 support.

I think if it might bring compatibility issues, i can send PR that will add some flag in wifi struct, which user can set to enable ipv6. For user it will look something like:

  Serial.begin(115200);
+ WiFi.IPV6(true);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);

Describe alternatives you've considered

No response

Additional context

No response

I have checked existing list of Feature requests and the Contribution Guide

• [X] I confirm I have checked existing list of Feature requests and Contribution Guide.

[copercini]

It's possible to do it calling WiFi.enableIpV6();

I usually use it in ARDUINO_EVENT_WIFI_STA_CONNECTED event, but it should work from other places

[VojtechBartoska]

@nuclearcat Any updates?

[VojtechBartoska]

is this still valid?

[nuclearcat]

Yes might work on it at free time, probably this week

[VojtechBartoska]

thanks @nuclearcat!

[nuclearcat]

I added series of patches in PR, that provide necessary support for IPv6, but it needs serious testing, especially as i dont have yet devboards on s2, s3 and c3. Also i will test in more scenarios in upcoming days and probably will provide additional test/demo sketches.

[nuclearcat]

Any feedback? :)

[leonelsr]

So... Another year has passed. Any progress on IPv6 support for ESP32 on Arduino Environment?

[nuclearcat]

Latest PR is https://github.com/espressif/arduino-esp32/pull/7722 , it's not mine anymore, but i believe can call myself as co-author and i'm totally happy with it (it is used also in Tasmota). I suggest to support author and ping Espressif maintainers, as it's important matter to merge it.

[anuragrao04]

What's the status of this PR? I have been trying to get an ipv6 address for my esp32 and it doesn't work. Here's the code:

#include <WiFi.h>
#include <HTTPClient.h>


const char* ssid = "ssid";
const char* password = "intentionally_removed";



void setup() {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  WiFi.enableIpV6();

  WiFi.begin(ssid, password);

  Serial.println("\nConnecting to WiFi Network...");

  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(100);
  }
  
  Serial.println("\nConnected to the wifi network!");
}

void loop() {
  HTTPClient http;
  http.begin("http://api64.ipify.org");
  int httpCode = http.GET();

  if (httpCode > 0) {
    String payload = http.getString();
    Serial.println(payload);
  }
  http.end();
  delay(1000);
}

Am I missing something? http://api64.ipify.org gives you an ipv6 address if you have one, else gives you an ipv4 address reply.

When I run this code, I only get the ipv4 address and not the ipv6 one.

[VojtechBartoska]

Hello,

this should be solved by this PR: https://github.com/espressif/arduino-esp32/pull/9016

Please give it a try, if needed you can reopen this ticket.