Issues with UDP client to UDP server with 10057 error - c++

Question

I have an issues of connecting to my UDP server. On VS it showed no errors except when I do an error checking it give me a Error 10057.
UDP Client:
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <Winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>
#include <iostream>
#include <string>
#include <string.h>
#pragma comment(lib, "ws2_32.lib")
#define ZeroMemory
using namespace std;
WSADATA wsadata;
SOCKET Client;
SOCKADDR_IN Server;
unsigned int Port = 5020;
int ret;
char buf[4096];
int len, tolen, fromlen, namelen;
int main(int argc, char * argv[])
{
// Initialize Winsocket
ret = WSAStartup(MAKEWORD(2, 2), &wsadata);
// CHECKS THE SOCKET STATUS
if (ret == SOCKET_ERROR)
{
printf("Client: Winstock Status is: %s ", wsadata.szSystemStatus);
WSACleanup();
cout << endl;
}
else
{
printf("Client: Winstock Status is: %s ", wsadata.szSystemStatus);
cout << endl;
}
// Client Address
Server.sin_family = AF_INET;
Server.sin_port = htons(Port);
inet_pton(AF_INET, "127.0.0.1", &Server.sin_addr);
// Create Socket
ret = Client = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
// CHECKS IF SOCKET IS CREATED
if (Client == INVALID_SOCKET)
{
cout << "Client: Can't Create Socket! ERROR: %s " << WSAGetLastError();
WSACleanup();
cout << endl;
}
// Bind Socket
ret = bind(Client, (sockaddr*)& Server,sizeof(Server));
// CHECKS IF SOCKET IS BINDED
if (ret == INVALID_SOCKET)
{
cout << "Client: Failed to bind socket" << WSAGetLastError(); ;
cout << endl;
}
string s(argv[1]);
// SendTo()
ret = sendto
(
Client,
s.c_str(),
s.size() + 1,
0,
(sockaddr*) & Server,
sizeof(Server)
);
if (ret == SOCKET_ERROR);
{
cout << "That did not work! Error Code: " << WSAGetLastError();
cout << endl;
}
// CloseSocket
closesocket(Client);
// CleanUp Winsocket
WSACleanup();
return 0;
}
UDP Server:
#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <Winsock2.h>
#include <ws2tcpip.h>
#include <stdio.h>
#include <iostream>
#include <string>
#include <string.h>
#pragma comment(lib, "ws2_32.lib")
using namespace std;
WSADATA wsadata;
SOCKET ServerSocket;
SOCKADDR_IN ServerAddress, Client;
unsigned int Port = 5020;
char buf[4096];
int ret;
int len, tolen, fromlen, namelen;
int main()
{
// Initializing Socket
ret = WSAStartup(MAKEWORD(2, 2), &wsadata);
if (ret == SOCKET_ERROR)
{
cout << "Server: Failed to initialized socket. Error: " << wsadata.szSystemStatus;
cout << endl;
}
else
{
cout << "Server: Successfully initialized socket." << wsadata.szSystemStatus;
cout << endl;
}
// Sever Address
ServerAddress.sin_family = AF_INET;
ServerAddress.sin_port = htons(Port);
inet_pton(AF_INET, "127.0.0.1", &ServerAddress.sin_addr);
// Create Socket
ret = ServerSocket = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (ret == -1)
{
cout << "Server: Failed to create socket. Error: " << WSAGetLastError();
cout << endl;
}
else
{
cout << "Server: Socket has been created ";
cout << endl;
}
// Bind Socket
ret = bind(ServerSocket, (sockaddr*)& ServerAddress, sizeof(ServerAddress));
if (ret == -1)
{
cout << "Server: Failed to bind socket. Error: " << WSAGetLastError();
cout << endl;
}
else
{
cout << "Server: Socket is binded to address ";
cout << endl;
}
int ClientLength = sizeof(Client);
while(true)
{
// receivefrom
ret = recvfrom
(
ServerSocket,
buf,
len,
0,
(sockaddr*)& Client,
&ClientLength
);
if (ret == SOCKET_ERROR)
{
cout << "Error receiving from client" << WSAGetLastError();
}
// display message
char ClientIP[256];
inet_ntop(AF_INET, &Client.sin_addr, ClientIP, 256);
cout << "message recieve from: " << ClientIP << " : " << buf << endl;
}
// Close Socket
closesocket(ServerSocket);
// Cleanup Winsocket
WSACleanup();
return 0;
}
I have executed the client first, no issues, executed server then client that's when it showed the issue.
// SendTo()
ret = sendto
(
Client,
s.c_str(),
s.size() + 1,
0,
(sockaddr*) & Server,
sizeof(Server)
);
if (ret == SOCKET_ERROR);
{
cout << "That did not work! Error Code: " << WSAGetLastError();
cout << endl;
}

Answer 1

Two mistakes:
ret = Client = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
If you are writing a UDP client, you need to create a UDP socket, not a TCP socket:
ret = Client = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
ret = bind(Client, (sockaddr*)& Server,sizeof(Server));
This is on the client side. Why are you trying to bind() to the server's endpoint? You use bind() to set the local address of the socket, not the remote address. Use connect() for the remote address (which you don't need to do when using sendto()).