c++ socket client implementation - c++

Question

I have maybe a strange problem, but I can't get sockets working. I need to connect c++ app with node.js server, which has open socket. I have tried many sources, but none of them are working. One of that, that I have at the moment:
#define DEFAULT_BUFLEN 512
#define DEFAULT_PORT "3000"
int sock()
{
int argc = 2;
const char* argv[3];
argv[0] = "127.0.0.1";
argv[1] = "127.0.0.1";
WSADATA wsaData;
SOCKET ConnectSocket = INVALID_SOCKET;
struct addrinfo* result = NULL,
* ptr = NULL,
hints;
const char* sendbuf = "this is a test";
char recvbuf[DEFAULT_BUFLEN];
int iResult;
int recvbuflen = DEFAULT_BUFLEN;
// Validate the parameters
if (argc != 2) {
printf("usage: %s server-name\n", argv[0]);
return 1;
}
// Initialize Winsock
iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != 0) {
printf("WSAStartup failed with error: %d\n", iResult);
return 1;
}
ZeroMemory(&hints, sizeof(hints));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
hints.ai_protocol = IPPROTO_TCP;
// Resolve the server address and port
iResult = getaddrinfo(argv[1], DEFAULT_PORT, &hints, &result);
if (iResult != 0) {
printf("getaddrinfo failed with error: %d\n", iResult);
WSACleanup();
return 1;
}
// Attempt to connect to an address until one succeeds
for (ptr = result; ptr != NULL; ptr = ptr->ai_next) {
// Create a SOCKET for connecting to server
ConnectSocket = socket(ptr->ai_family, ptr->ai_socktype,
ptr->ai_protocol);
if (ConnectSocket == INVALID_SOCKET) {
printf("socket failed with error: %ld\n", WSAGetLastError());
WSACleanup();
return 1;
}
// Connect to server.
iResult = connect(ConnectSocket, ptr->ai_addr, (int)ptr->ai_addrlen);
if (iResult == SOCKET_ERROR) {
closesocket(ConnectSocket);
ConnectSocket = INVALID_SOCKET;
continue;
}
break;
}
freeaddrinfo(result);
if (ConnectSocket == INVALID_SOCKET) {
printf("Unable to connect to server!\n");
WSACleanup();
return 1;
}
// Send an initial buffer
iResult = send(ConnectSocket, sendbuf, (int)strlen(sendbuf), 0);
if (iResult == SOCKET_ERROR) {
printf("send failed with error: %d\n", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return 1;
}
printf("Bytes Sent: %ld\n", iResult);
// shutdown the connection since no more data will be sent
iResult = shutdown(ConnectSocket, SD_SEND);
if (iResult == SOCKET_ERROR) {
printf("shutdown failed with error: %d\n", WSAGetLastError());
closesocket(ConnectSocket);
WSACleanup();
return 1;
}
// Receive until the peer closes the connection
do {
iResult = recv(ConnectSocket, recvbuf, recvbuflen, 0);
if (iResult > 0)
printf("Bytes received: %d\n", iResult);
else if (iResult == 0)
printf("Connection closed\n");
else
printf("recv failed with error: %d\n", WSAGetLastError());
} while (iResult > 0);
// cleanup
closesocket(ConnectSocket);
WSACleanup();
return 0;
}
This is official microsoft code for the winsock client. Also, I have tried socket client code from here: https://www.geeksforgeeks.org/socket-programming-cc/
From the microsoft code I am getting that, data was sent, but node.js console remains empty: https://prnt.sc/zdhpsi
Node.js server code:
var port = 3000;
var io = require('socket.io')().listen(port);
console.log("Listening on port " + port);
/* Socket.IO events */
io.on("connection", function(socket){
console.log("new connection");
socket.on('test_text', (...args) => {
console.log("test text event received.", args);
});
socket.on('test_binary', (...args) => {
console.log("test binary event received", args);
if(args[0] instanceof Buffer)
{
console.log("test binary event received,binary length:"+ args[0].length);
}
});
socket.on('test ack',function()
{
var args =Array.prototype.slice.call(arguments);
if('object' == typeof args[0])
{
console.log("test combo received,object:");
console.log(JSON.stringify(args[0]));
}
if(args.length>1 && 'function' == typeof args[args.length - 1])
{
console.log('need ack for test combo');
var fn = args[args.length - 1];
fn('Got bin length:' + args[0].bin.length);//invoke ack callback function.
}
});
});
On c++ side I don't need to recieve anything, I just need to send the data
Maybe you know how this could be done? Thanks :)