Basic network setup through winsock.

Lab1/server.cpp

@@ -0,0 +1,127 @@
+/*
+  Andreas Gagas
+  CLASS HERE
+  Lab01 - Implementation and Application of DES 
+*/
+
+#pragma comment(lib, "Ws2_32.lib")
+
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <winsock2.h>
+#include <ws2tcpip.h>
+
+#define DEFAULT_PORT_NUM 8000 
+
+
+int main(int argc, char **argv) {
+
+  // ----------- PORT # -------------------------------------------------------------
+  int port_num; 
+
+  if (argc == 1) port_num = DEFAULT_PORT_NUM;
+  else port_num = sscanf(argv[1], "%d", &port_num); 
+
+  std::cout << "port num is: " << port_num << std::endl; 
+
+  // ----------- GET KEY -------------------------------------------------------------
+  std::string key;
+  std::ifstream read_key("key.txt");
+
+  if (read_key.is_open()) {
+    while (getline(read_key, key)) {}
+    read_key.close();
+  }
+
+  std::cout << "key is: " << key << std::endl;
+
+
+  // ----------- Network Setup (Winsock) ----------------------------------------------
+
+  // Init Winsock
+  WSADATA wsa_data; 
+
+  int retval = WSAStartup(MAKEWORD(2, 2), &wsa_data); 
+  if (retval != 0) {
+    std::cout << "Error, WSAStartup failed" << std::endl;
+    return 1; 
+  }
+
+  // Prepare sockaddr_in structure
+  struct sockaddr_in server, client;
+
+  server.sin_family = AF_INET;
+  server.sin_addr.s_addr = INADDR_ANY; // default 127.0.0.1 
+  server.sin_port = htons(port_num);  // default is 8000
+
+  // Create Socket (server) 
+  SOCKET server_socket;
+
+  server_socket = socket(AF_INET, SOCK_STREAM, 0); 
+  if (server_socket == INVALID_SOCKET) {
+    std::cout << "Error, socket creation failed" << std::endl; 
+    WSACleanup(); 
+    return 1; 
+  }
+
+  // Bind (server socket address to socket desc.) 
+  retval = bind(server_socket, (struct sockaddr*)&server, sizeof(server));
+  if (retval == SOCKET_ERROR) {
+    std::cout << "Error, failed to bind" << std::endl; 
+    closesocket(server_socket); 
+    WSACleanup();
+    return 1; 
+  }
+
+  // Listen
+  retval = listen(server_socket, SOMAXCONN); 
+  std::cout << "Waiting for incoming connection on PORT: " << port_num << std::endl; 
+  if (retval == SOCKET_ERROR) {
+    std::cout << "Error, failed to listen" << std::endl;
+    closesocket(server_socket);
+    WSACleanup();
+    return 1;
+  }
+
+  // Accept connection (client) 
+  SOCKET client_socket; 
+
+  client_socket = accept(server_socket, NULL, NULL);
+  if (client_socket == INVALID_SOCKET) {
+    std::cout << "Error, failed to accept connection" << std::endl;
+    closesocket(server_socket);
+    WSACleanup();
+    return 1; 
+  }
+
+  std::cout << "Connected" << std::endl; 
+
+  // close server socket?? 
+
+
+   // ----------- Main Loop (Client is connected) ----------------------------------------------
+
+  while (1) {
+    // 
+  }
+
+
+
+
+
+
+
+
+
+  // Connected, send greeting to client 
+
+  // client will input their msg in plain text (store std::string message) 
+
+  // ... 
+
+
+
+
+  return 0; 
+}