C++ WebSocket in macOS App - c++

Question

I'm trying to build a little Chat App just between the Server and the Client. I stumbled across this YouTube video (GitHub source).
If I run both scripts everything works fine but if I try to put the Client-Side into an macOS Application the Client says that it has connected even though the Server isn't running.
Client.cpp
#include <iostream>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <unistd.h>
#include <netdb.h>
#include "Client.hpp"
using namespace std;
void connectToServer()
{
int client;
int portNum = 1600; // NOTE that the port number is same for both client and server
bool isExit = false;
int bufsize = 1024;
char buffer[bufsize];
char* ip = "127.0.0.1";
struct sockaddr_in server_addr;
client = socket(AF_INET, SOCK_STREAM, 0);
if (client < 0)
{
cout << "\nError establishing socket..." << endl;
exit(1);
}
cout << "\n=> Socket client has been created..." << endl;
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(portNum);
if (connect(client,(struct sockaddr *)&server_addr, sizeof(server_addr)) == 0)
cout << "=> Connection to the server port number: " << portNum << endl;
cout << "=> Awaiting confirmation from the server..." << endl; //line 40
recv(client, buffer, bufsize, 0);
std::cout << client << std::endl;
std::cout << buffer << std::endl;
cout << "=> Connection confirmed, you are good to go...";
cout << "\n\n=> Enter # to end the connection\n" << endl;
// Once it reaches here, the client can send a message first.
do {
cout << "Client: ";
do {
cin >> buffer;
send(client, buffer, bufsize, 0);
if (*buffer == '#') {
send(client, buffer, bufsize, 0);
*buffer = '*';
isExit = true;
}
} while (*buffer != 42);
cout << "Server: ";
do {
recv(client, buffer, bufsize, 0);
cout << buffer << " ";
if (*buffer == '#') {
*buffer = '*';
isExit = true;
}
} while (*buffer != 42);
cout << endl;
} while (!isExit);
cout << "\n=> Connection terminated.\nGoodbye...\n";
close(client);
}
ViewController.mm
- (void)viewDidLoad {
[super viewDidLoad];
connectToServer();
}
Console Output:
=> Socket client has been created...
=> Awaiting confirmation from the server...
=> Connection confirmed, you are good to go...
=> Enter # to end the connection
Client: test *
Server: *
Client: