performance improvements + a good amount of changes

src/socket.cpp

@@ -0,0 +1,78 @@
+#include <arpa/inet.h>
+#include <exception>
+#include <fstream>
+#include <iostream>
+#include <malloc.h>
+#include <netinet/in.h>
+#include <sstream>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <unordered_map>
+
+using namespace std;
+
+class anthracite_socket {
+private:
+    int server_socket;
+    int client_socket {};
+    string client_ip;
+    struct sockaddr_in client_addr {};
+    socklen_t client_addr_len {};
+
+public:
+    anthracite_socket(int port, int max_queue = 10)
+        : server_socket(socket(AF_INET, SOCK_STREAM, 0))
+        , client_ip("")
+    {
+        struct sockaddr_in address {};
+        address.sin_family = AF_INET;
+        address.sin_port = htons(port);
+        address.sin_addr.s_addr = INADDR_ANY;
+
+        int x = 1;
+        setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, &x, sizeof(x));
+        bind(server_socket, (struct sockaddr*)&address, sizeof(address));
+
+        ::listen(server_socket, max_queue);
+    }
+
+    void wait_for_conn()
+    {
+        client_ip = "";
+        client_socket = accept(server_socket, (struct sockaddr*)&client_addr, &client_addr_len);
+        char ip_str[INET_ADDRSTRLEN];
+        inet_ntop(AF_INET, &client_addr.sin_addr, ip_str, INET_ADDRSTRLEN);
+        client_ip = string(ip_str);
+    }
+
+    string get_client_ip()
+    {
+        return client_ip;
+    }
+
+    void close_conn()
+    {
+        close(client_socket);
+        client_socket = -1;
+    }
+
+    void send_message(string msg)
+    {
+        if (client_socket == -1) {
+            return;
+        }
+        send(client_socket, &msg[0], msg.length(), 0);
+    }
+
+    string recv_message(int buffer_size = 1024)
+    {
+        if (client_socket == -1) {
+            return "";
+        }
+
+        char response[buffer_size + 1];
+        recv(client_socket, response, sizeof(response), 0);
+        response[buffer_size] = '\0';
+        return string(response);
+    }
+};