Implement rcon support

This fixes #337

src/client/component/command.cpp

@@ -81,6 +81,24 @@ namespace command
 		assert(this->nesting_ < game::CMD_MAX_NESTING);
 	}
 
+	params::params(const std::string& text)
+		: needs_end_(true)
+	{
+		auto* cmd_args = get_cmd_args();
+		game::Cmd_TokenizeStringKernel(0, game::CONTROLLER_INDEX_FIRST, text.data(),
+		                               512 - cmd_args->totalUsedArgvPool, false, cmd_args);
+
+		this->nesting_ = cmd_args->nesting;
+	}
+
+	params::~params()
+	{
+		if (this->needs_end_)
+		{
+			game::Cmd_EndTokenizedString();
+		}
+	}
+
 	int params::size() const
 	{
 		return get_cmd_args()->argc[this->nesting_];
@@ -189,8 +207,10 @@ namespace command
 		auto& allocator = *utils::memory::get_allocator();
 		const auto* cmd_string = allocator.duplicate_string(command);
 
-		game::Cmd_AddCommandInternal(cmd_string, game::Cbuf_AddServerText_f, allocator.allocate<game::cmd_function_s>());
-		game::Cmd_AddServerCommandInternal(cmd_string, execute_custom_sv_command, allocator.allocate<game::cmd_function_s>());
+		game::Cmd_AddCommandInternal(cmd_string, game::Cbuf_AddServerText_f,
+		                             allocator.allocate<game::cmd_function_s>());
+		game::Cmd_AddServerCommandInternal(cmd_string, execute_custom_sv_command,
+		                                   allocator.allocate<game::cmd_function_s>());
 	}
 }
 

src/client/component/command.hpp

@@ -6,6 +6,14 @@ namespace command
 	{
 	public:
 		params();
+		params(const std::string& text);
+		~params();
+
+		params(params&&) = delete;
+		params(const params&) = delete;
+
+		params& operator=(params&&) = delete;
+		params& operator=(const params&) = delete;
 
 		[[nodiscard]] int size() const;
 		[[nodiscard]] const char* get(int index) const;
@@ -17,6 +25,7 @@ namespace command
 		}
 
 	private:
+		bool needs_end_{false};
 		int nesting_;
 	};
 

src/client/component/console.cpp

@@ -27,6 +27,7 @@ namespace console
 		utils::image::object logo;
 		std::atomic_bool started{false};
 		std::atomic_bool terminate_runner{false};
+		utils::concurrency::container<std::function<void(const std::string& message)>> interceptor{};
 		utils::concurrency::container<std::queue<std::string>> message_queue{};
 
 		void print_message(const char* message)
@@ -43,6 +44,14 @@ namespace console
 
 		void queue_message(const char* message)
 		{
+			interceptor.access([message](const std::function<void(const std::string&)>& callback)
+			{
+				if (callback)
+				{
+					callback(message);
+				}
+			});
+
 			message_queue.access([message](std::queue<std::string>& queue)
 			{
 				queue.push(message);
@@ -202,6 +211,19 @@ namespace console
 		}
 	}
 
+	void set_interceptor(std::function<void(const std::string& message)> callback)
+	{
+		interceptor.access([&callback](std::function<void(const std::string&)>& c)
+		{
+			c = std::move(callback);
+		});
+	}
+
+	void remove_interceptor()
+	{
+		set_interceptor({});
+	}
+
 	struct component final : generic_component
 	{
 		void post_unpack() override

src/client/component/console.hpp

@@ -3,4 +3,24 @@
 namespace console
 {
 	void set_title(const std::string& title);
+	void set_interceptor(std::function<void(const std::string& message)> callback);
+	void remove_interceptor();
+
+	struct scoped_interceptor
+	{
+		scoped_interceptor(std::function<void(const std::string& message)> callback)
+		{
+			set_interceptor(std::move(callback));
+		}
+
+		~scoped_interceptor()
+		{
+			remove_interceptor();
+		}
+
+		scoped_interceptor(scoped_interceptor&&) = delete;
+		scoped_interceptor(const scoped_interceptor&) = delete;
+		scoped_interceptor& operator=(scoped_interceptor&&) = delete;
+		scoped_interceptor& operator=(const scoped_interceptor&) = delete;
+	};
 }

src/client/component/network.hpp

@@ -1,5 +1,7 @@
 #pragma once
 
+#include <game/game.hpp>
+
 namespace network
 {
 	using data_view = std::basic_string_view<uint8_t>;

src/client/component/rcon.cpp

@@ -0,0 +1,74 @@
+#include <std_include.hpp>
+#include "loader/component_loader.hpp"
+
+#include "network.hpp"
+#include "console.hpp"
+#include "command.hpp"
+#include "scheduler.hpp"
+
+#include <utils/finally.hpp>
+#include <utils/string.hpp>
+
+#include <game/utils.hpp>
+
+namespace rcon
+{
+	namespace
+	{
+		std::optional<std::string> get_and_validate_rcon_command(const std::string& data)
+		{
+			const command::params params{reinterpret_cast<const char*>(data.data())};
+
+			if (params.size() <= 1)
+			{
+				return {};
+			}
+
+			if (params[0] != game::get_dvar_string("rcon_password"))
+			{
+				return {};
+			}
+
+			return params.join(1);
+		}
+
+		void rcon_executer(const game::netadr_t& target, const std::string& data)
+		{
+			const auto command = get_and_validate_rcon_command(data);
+			if (!command)
+			{
+				return;
+			}
+
+			std::string console_buffer{};
+
+			console::scoped_interceptor _([&console_buffer](const std::string& text)
+			{
+				console_buffer += text;
+			});
+
+			game::Cmd_ExecuteSingleCommand(0, game::CONTROLLER_INDEX_FIRST, command->data(), true);
+
+			network::send(target, "print", console_buffer);
+		}
+
+		void rcon_handler(const game::netadr_t& target, const network::data_view& data)
+		{
+			auto str_data = std::string(reinterpret_cast<const char*>(data.data()), data.size());
+			scheduler::once([target, s = std::move(str_data)]
+			{
+				rcon_executer(target, s);
+			}, scheduler::main);
+		}
+	}
+
+	struct component final : server_component
+	{
+		void post_unpack() override
+		{
+			network::on("rcon", rcon_handler);
+		}
+	};
+}
+
+REGISTER_COMPONENT(rcon::component)

src/client/game/symbols.hpp

@@ -50,8 +50,11 @@ namespace game
 	};
 	WEAK symbol<void(int localClientNum, ControllerIndex_t controllerIndex, const char* text,
 	                 bool fromRemoteConsole)> Cmd_ExecuteSingleCommand{
-		0x1420ED380
+		0x1420ED380, 0x1404F8890
 	};
+	WEAK symbol<void(int localClientNum, ControllerIndex_t localControllerIndex, const char* text_in, int max_tokens,
+	                 bool evalExpressions, CmdArgs* args)> Cmd_TokenizeStringKernel{0x1420EED60, 0x1404FA300};
+	WEAK symbol<void()> Cmd_EndTokenizedString{0x1420ECED0, 0x1404F8420};
 	WEAK symbol<void(char* text, int maxSize)> Con_GetTextCopy{0x14133A7D0, 0x140182C40};
 
 	// DB