WiFi.hostByName resolves to 255.255.255.255 when should return error

[gnalbandian]

Hi.

I'm having issues with WiFi.hostByName.
The function is returning 255.255.255.255 when trying to resolve google.com.er, which doesn't exists.
It should return error.

The function used internally is dns_gethostbyname.

Can someone else makes some test to figure out is this is an actual issue or is something particularly of my own code.

Thanks!

[d-a-v]

255.255.255.255 is INADDR_NONE.
In current git version, the resulting IP can be tested with .isSet() which tests if IP address is neither 0.0.0.0 or 255.255.255.255.
The bool() operator uses ::isSet() so you can do that:

    if (!ip)
        Serial.println("address not found");

Unfortunately v2.7.4 (latest release) ::isSet() does not check for NONE.
v3.0 of this core will be out soon, in the meantime you can use git master, or the "stage" version if you are using PlatformIO, or an unofficial snapshot release for the arduino IDE board manager.

[gnalbandian]

Thanks. I really appreciate your answer.
Regard!