WinSock2 Client.cpp

#include <stdio.h>
#include <string>
#include <winsock2.h>
#include <ws2tcpip.h>
using std::string;

class Sender {
  char* address;
  char* port;
public:
  Sender(char* address, char* port) {
    this->address = address;
    this->port = port;
  }

  void send(char* message)
  {
    ADDRINFO hints={0}, *result;
    SOCKET client;


    hints.ai_family = AF_UNSPEC;
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_protocol = IPPROTO_TCP;

    int addrinfoerror = getaddrinfo(address, port, &hints, &result);
    if (addrinfoerror)
    {
      printf("getaddrinfo returned error.");
      return;
    }
    client = socket(result->ai_family, result->ai_socktype, result->ai_protocol);
    

    int connectresult = connect(client, result->ai_addr, result->ai_addrlen);
    if (connectresult == SOCKET_ERROR)
    {
      printf("socket connect error.");
      return;
    }
    ::send(client, message, strlen(message), 0);
    closesocket(client);
  }
};

int main(int argc, char* argv[]) {
  WSAData wsData;

  if (WSAStartup(MAKEWORD(2,0), &wsData))
    return 1;

  Sender("127.0.0.1", "502").send("hello!");
  WSACleanup();
  return 0;
}