push

.gitignore

@@ -0,0 +1 @@
+.claude

Makefile

@@ -0,0 +1,31 @@
+NAME		= ircserv
+CXX		= c++
+CXXFLAGS	= -Wall -Wextra -Werror -std=c++98
+INCLUDES	= -I includes
+
+SRCS		= main.cpp \
+		  srcs/Server.cpp \
+		  srcs/ParseBuffer.cpp \
+		  srcs/IrcParser.cpp \
+		  srcs/IrcMessage.cpp \
+		  srcs/CommandValidator.cpp
+
+OBJS		= $(SRCS:.cpp=.o)
+
+all:		$(NAME)
+
+$(NAME):	$(OBJS)
+		$(CXX) $(CXXFLAGS) $(OBJS) -o $(NAME)
+
+%.o:		%.cpp
+		$(CXX) $(CXXFLAGS) $(INCLUDES) -c $< -o $@
+
+clean:
+		rm -f $(OBJS)
+
+fclean:		clean
+		rm -f $(NAME)
+
+re:		fclean all
+
+.PHONY:		all clean fclean re

includes/Server.hpp

@@ -14,6 +14,7 @@
 # include <stdexcept>
 # include <cstring>
 # include <cerrno>
+# include "CommandValidator.hpp"
 
 struct ConnectedUser
 {
@@ -27,6 +28,7 @@ struct ConnectedUser
 	bool			userOk;
 	ParseBuffer		parseBuffer;
 
+	ConnectedUser(void);
 	explicit ConnectedUser(int fd);
 	bool	isRegistered(void) const;
 };
@@ -43,6 +45,12 @@ class Server
 		void	acceptNew(void);
 		void	handleRecv(int fd);
 		void	removeUser(int fd);
+		void	dispatch(int fd, const IrcMessage &msg);
+		void  	handlePass(int fd, const IrcMessage &msg);
+		void 	handleNick(int fd, const IrcMessage &msg);
+		void  	handleUser(int fd, const IrcMessage &msg);
+		void  	handlePing(int fd, const IrcMessage &msg);
+		void  	handleQuit(int fd, const IrcMessage &msg);
 
 	public:
 		Server(int port, const std::string &password);

main.cpp

@@ -0,0 +1,30 @@
+#include <iostream>
+#include <cstdlib>
+#include "Server.hpp"
+
+int	main(int argc, char **argv)
+{
+	if (argc != 3)
+	{
+		std::cerr << "Usage: ./ircserv <port> <password>" << std::endl;
+		return (1);
+	}
+	int port = std::atoi(argv[1]);
+	if (port <= 0 || port > 65535)
+	{
+		std::cerr << "Error: invalid port" << std::endl;
+		return (1);
+	}
+	try
+	{
+		Server server(port, argv[2]);
+		server.start();
+		server.run();
+	}
+	catch (std::exception &e)
+	{
+		std::cerr << "Error: " << e.what() << std::endl;
+		return (1);
+	}
+	return (0);
+}

srcs/Server.cpp

@@ -37,3 +37,210 @@ void Server::start(void)
     pollfd.revents = 0;
     _fds.push_back(pollfd);
 }
+
+ConnectedUser::ConnectedUser(void) : fd(-1), passOk(false), nickOk(false), userOk(false)
+{
+}
+
+ConnectedUser::ConnectedUser(int fd) : fd(fd), passOk(false), nickOk(false), userOk(false)
+{
+}
+
+bool ConnectedUser::isRegistered(void) const
+{
+    return (passOk && nickOk && userOk);
+}
+
+Server::Server(int port, const std::string &password)
+{
+    _port = port;
+    _password = password;
+    _serverFd = -1;
+}
+
+Server::Server(const Server &other)
+{
+    *this = other;
+}
+
+Server &Server::operator=(const Server &other)
+{
+     if (this != &other)
+     {
+        _serverFd = other._serverFd;
+        _port = other._port;
+        _password = other._password;
+        _fds = other._fds;
+        _users = other._users;
+     }
+     return *this;
+}
+
+Server::~Server(void)
+{
+    for (size_t i = 0; i < _fds.size(); i++)
+    {
+        close(_fds[i].fd);
+    }
+}
+
+void Server::sendReply(int fd, const std::string &msg)
+{
+    send(fd, msg.c_str(), msg.size(), 0);
+}
+
+void Server::removeUser(int fd)
+{
+    close(fd);
+    _users.erase(fd);
+    for (size_t i = 0; i < _fds.size(); i++)
+    {
+        if (_fds[i].fd == fd)
+        {
+            _fds.erase(_fds.begin() + i);
+            break ;
+        }
+    }
+}
+
+void Server::acceptNew(void)
+{
+    int newFd = accept(_serverFd, NULL, NULL);
+    if (newFd == -1)
+        throw std::runtime_error(strerror(errno));
+    fcntl(newFd, F_SETFL, O_NONBLOCK);
+    struct pollfd pfd;
+    pfd.fd = newFd;
+    pfd.events = POLLIN;
+    pfd.revents = 0;
+    _fds.push_back(pfd);
+    _users.insert(std::make_pair(newFd, ConnectedUser(newFd)));
+}
+
+void Server::handleRecv(int fd)
+{
+    char buf[512];
+    int n;   
+    n = recv(fd, buf, sizeof(buf), 0);
+    if (n == 0)
+    {
+        removeUser(fd);
+        return ;
+    }
+    else if (n == -1)
+    {
+        if (errno == EAGAIN || errno == EWOULDBLOCK)
+            return ;
+        else
+        {
+            removeUser(fd);
+            return ;
+        }   
+    }
+    _users[fd].parseBuffer.append(buf, n);
+    std::vector<IrcMessage> messages = _users[fd].parseBuffer.extractMessages();
+    for (size_t i = 0; i < messages.size(); i++)
+        dispatch(fd, messages[i]);
+}
+
+void Server::run(void)
+{
+    while (true)
+    {
+        int ret = poll(_fds.data(), _fds.size(), -1);
+        if (ret == -1)
+            break ;
+        for (size_t i = 0; i < _fds.size(); i++)
+        {
+            if (i == 0 && _fds[0].revents & POLLIN)
+                acceptNew();
+            else if (_fds[i].revents & (POLLHUP | POLLERR))
+            {
+                int fd = _fds[i].fd;
+                removeUser(fd);
+                i--;
+            }
+            else if ( _fds[i].revents & POLLIN)
+                handleRecv(_fds[i].fd);
+        }
+    }
+}
+
+void Server::dispatch(int fd, const IrcMessage &msg)
+{
+    if (!msg.isValid())
+        return ;
+    const std::string &cmd = msg.getCommand();
+    if (CommandValidator::needsRegistration(cmd) && !_users[fd].isRegistered())
+    {
+        sendReply(fd, "451 :You have not registered\r\n");
+        return ;
+    }
+    else if (!CommandValidator::hasEnoughParams(msg))
+    {
+        sendReply(fd, "461 " + cmd + " :Not enough parameters\r\n");
+        return ;
+    }
+    else if (cmd == "PASS")
+        handlePass(fd, msg);
+    else if (cmd == "NICK")
+        handleNick(fd, msg);
+    else if (cmd == "USER")
+        handleUser(fd, msg);
+    else if (cmd == "PING")
+        handlePing(fd, msg);
+    else if (cmd == "QUIT")
+        handleQuit(fd, msg);
+}
+
+void Server::handlePass(int fd, const IrcMessage &msg)
+{
+    if (msg.param(0) == _password)
+        _users[fd].passOk = true;
+    else
+    {
+        sendReply(fd, "464 :Password incorrect\r\n");
+        removeUser(fd);
+    }
+}
+
+void Server::handleNick(int fd, const IrcMessage &msg)
+{
+    std::string newNick = msg.param(0);
+    std::map<int, ConnectedUser>::iterator it = _users.begin();
+    for (; it != _users.end(); it++)
+    {
+        if (it->second.nick == newNick && it->first != fd)
+        {
+            sendReply(fd, "433 * " + newNick + " :Nickname is already in use\r\n");
+            return ;
+        }
+    }
+    _users[fd].nick = newNick;
+    _users[fd].nickOk = true;
+}
+
+void Server::handleUser(int fd, const IrcMessage &msg)
+{
+    if (_users[fd].isRegistered() == true)
+        return ;
+    _users[fd].username = msg.param(0);
+    _users[fd].realname = msg.param(3);
+    _users[fd].userOk = true;
+    if (_users[fd].isRegistered())
+    {
+        sendReply(fd, ":server 001 " + _users[fd].nick + " :Welcome to the IRC server\r\n");
+        sendReply(fd, ":server 002 " + _users[fd].nick + " :Your host is server\r\n");
+    }
+}
+
+void Server::handlePing(int fd, const IrcMessage &msg)
+{
+    sendReply(fd, "PONG :" + msg.param(0) + "\r\n");
+}
+
+void Server::handleQuit(int fd, const IrcMessage &msg)
+{
+    removeUser(fd);
+    (void)msg;
+}