Connecting to an IRC server, getting Ping timeout without receiving PING message - c++

Question

I'm trying my hands at network programming for the first time, implementing a small IRC bot using the SFML network functionality.
The connection gets established, but from there on I can't do much else. Trying to receive any data from the server yields nothing, until I get the "Ping timeout" message after a few seconds.
Removing all or some of the receive() calls in the loginOnIRC function doesn't do any good.
Trying to connect via telnet with the exact same messages works. Here I get a PING message right after sending my NICK message.
Am I missing something?
My code is as follows
#include <iostream>
#include <string>
#include <SFML/Network.hpp>
#define ARRAY_LEN(x) (sizeof(x)/sizeof(*x))
void receive(sf::TcpSocket* sck)
{
char rcvData[100];
memset(rcvData, 0, ARRAY_LEN(rcvData));
std::size_t received;
if (sck->receive(rcvData, ARRAY_LEN(rcvData), received) != sf::Socket::Done)
{
std::cout << "oops" << std::endl;
}
std::cout << "Received " << received << " bytes" << std::endl;
std::cout << rcvData << std::endl;
}
int establishConnection(sf::TcpSocket* sck)
{
sf::Socket::Status status = sck->connect("irc.euirc.net", 6667, sf::seconds(5.0f));
if (status != sf::Socket::Done)
{
std::cout << "Error on connect!" << std::endl;
return 1;
}
std::cout << "Connect was successful!" << std::endl;
return 0;
}
int loginOnIRC(sf::TcpSocket* sck)
{
receive(sck); // We get a Ping timeout here
std::string data{ "NICK NimBot" };
if(sck->send(data.c_str(), data.length()) != sf::Socket::Done)
{
std::cout << "Error on sending " << data << std::endl;
return 1;
}
receive(sck);
data = "USER NimBot * * :Nimelrians Bot";
if (sck->send(data.c_str(), data.length()) != sf::Socket::Done)
{
std::cout << "Error on sending " << data << std::endl;
return 1;
}
receive(sck);
data = "JOIN #nimbottest";
if (sck->send(data.c_str(), data.length()) != sf::Socket::Done)
{
std::cout << "Error on sending " << data << std::endl;
return 1;
}
return 0;
}
int main()
{
sf::TcpSocket sck{};
establishConnection(&sck); // works
loginOnIRC(&sck);
while(true)
{
char data[100];
memset(data, 0, ARRAY_LEN(data));
std::size_t received;
sf::Socket::Status rcvStatus = sck.receive(data, ARRAY_LEN(data), received);
if (rcvStatus != sf::Socket::Done)
{
std::cout << "oops" << std::endl;
if (rcvStatus == sf::Socket::Disconnected)
{
break;
}
}
std::cout << "Received " << received << " bytes" << std::endl;
std::cout << data << std::endl;
}
return 0;
}