WIP add crude Socket class

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CMakeLists.txt

@@ -8,7 +8,7 @@ set (SRCS_MAIN
 )
 
 set (SRCS
-    src/hello-world.cpp
+	src/Socket.cpp
 )
 set (EXEC_NAME webserv)
 

include/Socket.hpp

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <string>
+
+class Socket {
+   public:
+    Socket(int port, int backlog = 5);
+    Socket(const Socket &other);
+    ~Socket();
+
+    int accept();
+    void close();
+
+    bool pending() const;
+
+    Socket &operator=(const Socket &other);
+
+   private:
+    int _socket_fd = -1;
+
+    void _socket();
+    void _bind(int port);
+    void _listen(int backlog);
+
+    // Protected c function as a static private method
+    static int _dup(int fd);
+    static void _close(int fd);
+};

src/Socket.cpp

@@ -0,0 +1,97 @@
+#include "Socket.hpp"
+
+#include <netinet/in.h>
+#include <poll.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+#include <stdexcept>
+
+Socket::Socket(int port, int backlog) {
+    _socket();
+    _bind(port);
+    _listen(backlog);
+}
+
+Socket::Socket(const Socket &other) {
+    *this = other;
+}
+
+Socket::~Socket() {
+    close();
+}
+
+Socket &Socket::operator=(const Socket &other) {
+    if (this == &other)
+        return *this;
+    close();
+    _socket_fd = _dup(other._socket_fd);
+    return *this;
+}
+
+int Socket::accept() {
+    int client_fd = ::accept(_socket_fd, NULL, NULL);
+    if (client_fd < 0) {
+        throw std::runtime_error("Failed to accept connection");
+    }
+    return client_fd;
+}
+
+bool Socket::pending() const {
+    static const int fd_count = 1;
+    struct pollfd fds[fd_count];
+
+    fds[0].fd = _socket_fd;
+    fds[0].events = POLLIN;
+
+    return poll(fds, fd_count, 0) > 0;
+}
+
+void Socket::_socket() {
+    _socket_fd = socket(AF_INET, SOCK_STREAM, 0);
+
+    if (_socket_fd < 0) {
+        throw std::runtime_error("Failed to create socket");
+    }
+}
+
+void Socket::_bind(int port) {
+    struct sockaddr_in addr;
+
+    addr.sin_family = AF_INET;
+    addr.sin_port = htons(port);
+    addr.sin_addr.s_addr = htonl(INADDR_ANY);
+    if (bind(_socket_fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+        throw std::runtime_error("Failed to bind socket");
+    }
+}
+
+void Socket::_listen(int backlog) {
+    if (listen(_socket_fd, backlog) < 0) {
+        throw std::runtime_error("Failed to listen on socket");
+    }
+}
+
+void Socket::close() {
+    if (_socket_fd < 0) {
+        return;
+    }
+    _close(_socket_fd);
+    _socket_fd = -1;
+}
+
+// Protected c function as a static private method
+
+int Socket::_dup(int fd) {
+    int new_fd = dup(fd);
+    if (new_fd < 0) {
+        throw std::runtime_error("Failed to duplicate file descriptor");
+    }
+    return new_fd;
+}
+
+void Socket::_close(int fd) {
+    if (::close(fd) < 0) {
+        throw std::runtime_error("Failed to close file descriptor");
+    }
+}