Change hostname with ethernet W5500lwIP library

[MassiPi]

Hello,
i searched both the open issues and the pull requests for setHostname() and i could not find anything, please excuse me if i lost something :)
i'm trying to change the hostname with a wired ethernet connection using the "new" W5500lwIP library.
I'm trying to use both the eth.setHostname() and the WiFi.setHostname() functions (that should be the very same and both based on the wifi_station_set_hostname())
I tried to change the hostname in various places, getting no result at all.
This is the sample code:

#include <ESP8266WiFi.h>
#include <SPI.h>
#include <W5500lwIP.h>

byte mac[] = {0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02};

const char hostname[] = "NAMETEST";

Wiznet5500lwIP eth(D1);


void setup() {
  WiFi.mode(WIFI_OFF);
  // Open serial communications and wait for port to open:
  Serial.begin(115200);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  SPI.begin();
  SPI.setBitOrder(MSBFIRST);
  SPI.setDataMode(SPI_MODE0);
  SPI.setFrequency(4000000);

  Serial.println("First: before setDefault");
  Serial.println("eth.setHostname()");
  eth.setHostname(hostname);
  Serial.println("WiFi.setHostname()");
  WiFi.setHostname(hostname);

  eth.setDefault(); // use ethernet for default route

  Serial.println("Second: before begin");
  Serial.println("eth.setHostname()");
  eth.setHostname(hostname);
  Serial.println("WiFi.setHostname()");
  WiFi.setHostname(hostname);

  int present = eth.begin(mac);
  if (!present) {
    Serial.println("no ethernet hardware present");
    while(1);
  }

  Serial.println("Third: before connected");
  Serial.println("eth.setHostname()");
  eth.setHostname(hostname);
  Serial.println("WiFi.setHostname()");
  WiFi.setHostname(hostname);

  Serial.print("connecting ethernet");
  while (!eth.connected()) {
    Serial.print(".");
    delay(100);
  }
  Serial.println("Connected");

  Serial.println("Fourth: after connection");
  Serial.println("eth.setHostname()");
  eth.setHostname(hostname);
  Serial.println("WiFi.setHostname()");
  WiFi.setHostname(hostname);

}

void loop() {

  Serial.println("Fifth: in loop");
  Serial.println("eth.setHostname()");
  eth.setHostname(hostname);
  Serial.println("WiFi.setHostname()");
  WiFi.setHostname(hostname);

  delay(5000);
}

This is what i get:

First: before setDefault
eth.setHostname()
WiFi.hostname(NAMETEST): wifi_station_set_hostname() failed
WiFi.setHostname()
WiFi.hostname(NAMETEST): wifi_station_set_hostname() failed
Second: before begin
eth.setHostname()
WiFi.hostname(NAMETEST): wifi_station_set_hostname() failed
WiFi.setHostname()
WiFi.hostname(NAMETEST): wifi_station_set_hostname() failed
Third: before connected
eth.setHostname()
WiFi.hostname(NAMETEST): wifi_station_set_hostname() failed
WiFi.setHostname()
WiFi.hostname(NAMETEST): wifi_station_set_hostname() failed
connecting ethernet.Connected
Fourth: after connection
eth.setHostname()
WiFi.hostname(NAMETEST): wifi_station_set_hostname() failed
WiFi.setHostname()
WiFi.hostname(NAMETEST): wifi_station_set_hostname() failed
Fifth: in loop
eth.setHostname()
WiFi.hostname(NAMETEST): wifi_station_set_hostname() failed
WiFi.setHostname()
WiFi.hostname(NAMETEST): wifi_station_set_hostname() failed

what am i missing?
is there a way to further debug this?
thanks!

[d-a-v]

Wifi is off by default. Maybe that's the reason. Could you try with

void setup () {
#ifdef WIFI_IS_OFF_AT_BOOT
  enableWiFiAtBootTime(); // can be called from anywhere with the same effect
#endif
...

[MassiPi]

Hello,
just tried, with and without the WiFi.mode(WIFI_OFF).
No differences, still wifi_station_set_hostname() failed and no hostname taken.
i noticed that also the status of the connection is wrongly reported when using common WiFi function (e.g. WiFi.status() reports 7 that should be disconnected), could this be linked?
no other ideas for me :)
Thanks!