example for new usage of poll()

srcs/Webserv.cpp

@@ -4,11 +4,11 @@
 Webserv::Webserv()
 {
 	std::cout << "Server init\n";
-	// _socket_fd = ::socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
-	_socket_fd = ::socket(AF_INET, SOCK_STREAM, 0);
+	_socket_fd = ::socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
+	//_socket_fd = ::socket(AF_INET, SOCK_STREAM, 0);
 	if (_socket_fd == -1)
 	{
-		::perror("err socket(): ");
+		std::perror("err socket(): ");
 		throw std::runtime_error("Socket init");
 	}
 }
@@ -37,13 +37,14 @@ void	Webserv::bind(in_port_t port)
 	// const struct sockaddr* cast_test = static_cast<const struct sockaddr*>(addr);
 
 	struct sockaddr_in	addr;
+	std::memset(&addr, 0, sizeof addr);
 	addr.sin_family = AF_INET;
 	addr.sin_port = ::htons(port);
 	addr.sin_addr.s_addr = ::htonl(INADDR_ANY); // htonl useless with 0 value (INADDR_ANY) ?
 
 	if (::bind(_socket_fd, (const sockaddr*)&addr, sizeof addr) == -1)
 	{
-		::perror("err bind(): ");
+		std::perror("err bind(): ");
 		throw std::runtime_error("Socket bind");		
 	}
 }
@@ -52,7 +53,7 @@ void	Webserv::listen(unsigned int max_connections)
 {
 	if (::listen(_socket_fd, max_connections) == -1)
 	{
-		::perror("err listen(): ");
+		std::perror("err listen(): ");
 		throw std::runtime_error("Socket listen");
 	}
 }
@@ -66,53 +67,93 @@ void	Webserv::start()
 	struct sockaddr_in	addr;
 	socklen_t 			addr_len;
 	int					accepted_fd;
-	struct pollfd		poll_s;
-	char				buf[BUFSIZE]; // WIP buffer. need to try with std::vector or std::string.
+	char				buf[BUFSIZE+1]; // WIP buffer. need to try with std::vector or std::string.
 	int					ret;
 
+	int	timeout = 3000;
+	int	i = 1;
+	int	nfds = 1;
+	int	ret_nfds;
+
+	_poll_s[0].fd = _socket_fd;
+	_poll_s[0].events = POLLIN;
+
 	std::cout << "Server started\n";
-	while (1)
+	int i_loop = 0;
+	++i_loop;
+	std::cout << i_loop << "----------\n";
+	std::cout << "loop poll()\n";
+	while ( (ret_nfds = ::poll(_poll_s, nfds, timeout)) != -1)
 	{
-		std::cout << "----------\n";
-		std::cout << "accept()\n";
-		addr_len = sizeof addr;
-		accepted_fd = ::accept(_socket_fd, (sockaddr*)&addr, &addr_len);
-		if (accepted_fd == -1)
+		i = 1;
+		while (i < nfds)
 		{
-			::perror("err accept(): ");
-			continue;		
+			if (ret_nfds == 0)
+			{
+				std::cout << "timeout\n";
+				::close(_poll_s[i].fd);
+				_poll_s[i].fd = -1;
+				--nfds;
+			}
+
+			else if (_poll_s[i].revents & POLLIN) // READ
+			{
+				std::cout << "recv()\n";
+				ret = ::recv(_poll_s[i].fd, buf, BUFSIZE, 0);
+				if (ret == -1)
+				{
+					std::perror("err recv(): ");
+					if (::send(_poll_s[i].fd, MSG_BOUNCE, sizeof MSG_BOUNCE - 1, 0) == -1)
+						std::perror("err send(): ");
+
+					::close(_poll_s[i].fd);
+					_poll_s[i].fd = -1;
+					--nfds;
+					continue;
+				}
+				/*
+				if (ret == BUFSIZE)
+					// send error like "request too long" to client
+				*/
+				buf[ret] = '\0';
+				_poll_s[i].events = POLLOUT;
+			}
+			
+			else if (_poll_s[i].revents & POLLOUT) // WRITE
+			{
+				std::cout << "send()\n";
+				if (::send(_poll_s[i].fd, buf, ret, 0) == -1) // echo the read
+					std::perror("err send(): ");
+				if (::send(_poll_s[i].fd, MSG_TEST, sizeof MSG_TEST - 1, 0) == -1)
+					std::perror("err send(): ");
+
+				::close(_poll_s[i].fd);
+				_poll_s[i].fd = -1;
+				--nfds;
+			}
+
+			++i;
 		}
-		// "Your server must never block and the client can be bounced properly if necessary".
-		// NO-Block OK, but how to handle it ? Miss the bouncing part.
-		::fcntl(accepted_fd, F_SETFL, O_NONBLOCK);
 
-		std::cout << "poll()\n"; // poll (or equivalent)
-		poll_s.fd = accepted_fd;
-		poll_s.events = POLLIN; // We need a way to valid POLLOUT and POLLIN at the same time (both, not one of them)
-		::poll(&poll_s, 1, -1);
 
-		std::cout << "recv()\n";
-		ret = ::recv(accepted_fd, buf, BUFSIZE, 0);
-		if (ret == -1)
+		if ((_poll_s[0].fd == _socket_fd) && (_poll_s[0].revents & POLLIN)) // ACCEPT
 		{
-			::perror("err recv(): ");
-			if (::send(accepted_fd, MSG_BOUNCE, sizeof MSG_BOUNCE - 1, 0) == -1)
-				::perror("err send(): ");
-			::close(accepted_fd);
-			continue;
+			std::cout << "accept()\n";
+			addr_len = sizeof addr;
+			accepted_fd = ::accept(_socket_fd, (sockaddr*)&addr, &addr_len);
+			if (accepted_fd == -1)
+			{
+				std::perror("err accept(): ");
+				continue;		
+			}
+			::fcntl(accepted_fd, F_SETFL, O_NONBLOCK);
+			_poll_s[nfds].fd = accepted_fd;
+			_poll_s[nfds].events = POLLIN;
+			++nfds;
 		}
-		/*
-		if (ret == BUFSIZE)
-			// send error like "request too long" to client
-		*/
-		buf[ret] = '\0';
-		
-		std::cout << "send()\n";
-		if (::send(accepted_fd, buf, ret, 0) == -1) // echo the read
-			::perror("err send(): ");
-		if (::send(accepted_fd, MSG_TEST, sizeof MSG_TEST - 1, 0) == -1)
-			::perror("err send(): ");
 
-		::close(accepted_fd);
+		++i_loop;
+		std::cout << i_loop << "----------\n";
+		std::cout << "loop poll()\n";
 	}
 }

srcs/Webserv.hpp

@@ -10,6 +10,7 @@
 # include <stdexcept>
 # include <unistd.h> // close
 # include <iostream> // cout, cin
+# include <cstring> // memset
 
 # include <sys/socket.h> // socket, accept, listen, send, recv, bind, connect, setsockopt, getsockname
 # include <netinet/in.h> // sockaddr_in
@@ -33,6 +34,7 @@ class Webserv
 
 	private:
 		int	_socket_fd;
+		struct pollfd	_poll_s[42]; // 42 PLACEHOLDER
 		std::map<std::string, std::string>	_request;
 		std::map<std::string, std::string>	_response;