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Libnetwork: add password protected rooms, guid, and error fixes (#3068)

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* Network: Add password protected roomsand GUID

* Limit chat message size
This commit is contained in:
B3n30 2017-11-19 19:52:37 +01:00 committed by GitHub
parent 4071da5012
commit c0a7afaa5c
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 139 additions and 33 deletions
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84
src/network/room.cpp
View file

@ -4,8 +4,10 @@
#include <algorithm>
#include <atomic>
#include <iomanip>
#include <mutex>
#include <random>
#include <sstream>
#include <thread>
#include "enet/enet.h"
#include "network/packet.h"
@ -13,9 +15,6 @@
namespace Network {
/// Maximum number of concurrent connections allowed to this room.
static constexpr u32 MaxConcurrentConnections = 10;
class Room::RoomImpl {
public:
// This MAC address is used to generate a 'Nintendo' like Mac address.
@ -27,6 +26,8 @@ public:
std::atomic<State> state{State::Closed}; ///< Current state of the room.
RoomInformation room_information; ///< Information about this room.
std::string password; ///< The password required to connect to this room.
struct Member {
std::string nickname; ///< The nickname of the member.
GameInfo game_info; ///< The current game of the member
@ -81,6 +82,11 @@ public:
*/
void SendVersionMismatch(ENetPeer* client);
/**
* Sends a ID_ROOM_WRONG_PASSWORD message telling the client that the password is wrong.
*/
void SendWrongPassword(ENetPeer* client);
/**
* Notifies the member that its connection attempt was successful,
* and it is now part of the room.
@ -99,6 +105,8 @@ public:
* <MessageID>ID_ROOM_INFORMATION
* <String> room_name
* <u32> member_slots: The max number of clients allowed in this room
* <String> uid
* <u16> port
* <u32> num_members: the number of currently joined clients
* This is followed by the following three values for each member:
* <String> nickname of that member
@ -136,13 +144,18 @@ public:
* to all other clients.
*/
void HandleClientDisconnection(ENetPeer* client);
/**
* Creates a random ID in the form 12345678-1234-1234-1234-123456789012
*/
void CreateUniqueID();
};
// RoomImpl
void Room::RoomImpl::ServerLoop() {
while (state != State::Closed) {
ENetEvent event;
if (enet_host_service(server, &event, 100) > 0) {
if (enet_host_service(server, &event, 50) > 0) {
switch (event.type) {
case ENET_EVENT_TYPE_RECEIVE:
switch (event.packet->data[0]) {
@ -188,6 +201,14 @@ void Room::RoomImpl::HandleJoinRequest(const ENetEvent* event) {
u32 client_version;
packet >> client_version;
std::string pass;
packet >> pass;
if (pass != password) {
SendWrongPassword(event->peer);
return;
}
if (!IsValidNickname(nickname)) {
SendNameCollision(event->peer);
return;
@ -260,6 +281,16 @@ void Room::RoomImpl::SendMacCollision(ENetPeer* client) {
enet_host_flush(server);
}
void Room::RoomImpl::SendWrongPassword(ENetPeer* client) {
Packet packet;
packet << static_cast<u8>(IdWrongPassword);
ENetPacket* enet_packet =
enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
enet_peer_send(client, 0, enet_packet);
enet_host_flush(server);
}
void Room::RoomImpl::SendVersionMismatch(ENetPeer* client) {
Packet packet;
packet << static_cast<u8>(IdVersionMismatch);
@ -301,6 +332,9 @@ void Room::RoomImpl::BroadcastRoomInformation() {
packet << static_cast<u8>(IdRoomInformation);
packet << room_information.name;
packet << room_information.member_slots;
packet << room_information.uid;
packet << room_information.port;
packet << room_information.preferred_game;
packet << static_cast<u32>(members.size());
{
@ -382,6 +416,9 @@ void Room::RoomImpl::HandleChatPacket(const ENetEvent* event) {
return; // Received a chat message from a unknown sender
}
// Limit the size of chat messages to MaxMessageSize
message.resize(MaxMessageSize);
Packet out_packet;
out_packet << static_cast<u8>(IdChatMessage);
out_packet << sending_member->nickname;
@ -433,12 +470,28 @@ void Room::RoomImpl::HandleClientDisconnection(ENetPeer* client) {
BroadcastRoomInformation();
}
void Room::RoomImpl::CreateUniqueID() {
std::uniform_int_distribution<> dis(0, 9999);
std::ostringstream stream;
stream << std::setfill('0') << std::setw(4) << dis(random_gen);
stream << std::setfill('0') << std::setw(4) << dis(random_gen) << "-";
stream << std::setfill('0') << std::setw(4) << dis(random_gen) << "-";
stream << std::setfill('0') << std::setw(4) << dis(random_gen) << "-";
stream << std::setfill('0') << std::setw(4) << dis(random_gen) << "-";
stream << std::setfill('0') << std::setw(4) << dis(random_gen);
stream << std::setfill('0') << std::setw(4) << dis(random_gen);
stream << std::setfill('0') << std::setw(4) << dis(random_gen);
room_information.uid = stream.str();
}
// Room
Room::Room() : room_impl{std::make_unique<RoomImpl>()} {}
Room::~Room() = default;
void Room::Create(const std::string& name, const std::string& server_address, u16 server_port) {
bool Room::Create(const std::string& name, const std::string& server_address, u16 server_port,
const std::string& password, const u32 max_connections,
const std::string& preferred_game, u64 preferred_game_id) {
ENetAddress address;
address.host = ENET_HOST_ANY;
if (!server_address.empty()) {
@ -446,13 +499,22 @@ void Room::Create(const std::string& name, const std::string& server_address, u1
}
address.port = server_port;
room_impl->server = enet_host_create(&address, MaxConcurrentConnections, NumChannels, 0, 0);
// TODO(B3N30): Allow specifying the maximum number of concurrent connections.
room_impl->server = enet_host_create(&address, max_connections, NumChannels, 0, 0);
if (!room_impl->server) {
return false;
}
room_impl->state = State::Open;
room_impl->room_information.name = name;
room_impl->room_information.member_slots = MaxConcurrentConnections;
room_impl->room_information.member_slots = max_connections;
room_impl->room_information.port = server_port;
room_impl->room_information.preferred_game = preferred_game;
room_impl->room_information.preferred_game_id = preferred_game_id;
room_impl->password = password;
room_impl->CreateUniqueID();
room_impl->StartLoop();
return true;
}
Room::State Room::GetState() const {
@ -474,7 +536,11 @@ std::vector<Room::Member> Room::GetRoomMemberList() const {
member_list.push_back(member);
}
return member_list;
};
}
bool Room::HasPassword() const {
return !room_impl->password.empty();
}
void Room::Destroy() {
room_impl->state = State::Closed;

28
src/network/room.h
View file

@ -14,12 +14,22 @@ namespace Network {
constexpr u32 network_version = 1; ///< The version of this Room and RoomMember
constexpr u16 DefaultRoomPort = 1234;
constexpr u16 DefaultRoomPort = 24872;
constexpr u32 MaxMessageSize = 500;
/// Maximum number of concurrent connections allowed to this room.
static constexpr u32 MaxConcurrentConnections = 254;
constexpr size_t NumChannels = 1; // Number of channels used for the connection
struct RoomInformation {
std::string name; ///< Name of the server
u32 member_slots; ///< Maximum number of members in this room
std::string name; ///< Name of the server
u32 member_slots; ///< Maximum number of members in this room
std::string uid; ///< The unique ID of the room
u16 port; ///< The port of this room
std::string preferred_game; ///< Game to advertise that you want to play
u64 preferred_game_id; ///< Title ID for the advertised game
};
struct GameInfo {
@ -46,6 +56,7 @@ enum RoomMessageTypes : u8 {
IdNameCollision,
IdMacCollision,
IdVersionMismatch,
IdWrongPassword,
IdCloseRoom
};
@ -81,12 +92,19 @@ public:
*/
std::vector<Member> GetRoomMemberList() const;
/**
* Checks if the room is password protected
*/
bool HasPassword() const;
/**
* Creates the socket for this room. Will bind to default address if
* server is empty string.
*/
void Create(const std::string& name, const std::string& server = "",
u16 server_port = DefaultRoomPort);
bool Create(const std::string& name, const std::string& server = "",
u16 server_port = DefaultRoomPort, const std::string& password = "",
const u32 max_connections = MaxConcurrentConnections,
const std::string& preferred_game = "", u64 preferred_game_id = 0);
/**
* Destroys the socket

47
src/network/room_member.cpp
View file

@ -74,10 +74,12 @@ public:
* nickname and preferred mac.
* @params nickname The desired nickname.
* @params preferred_mac The preferred MAC address to use in the room, the NoPreferredMac tells
* @params password The password for the room
* the server to assign one for us.
*/
void SendJoinRequest(const std::string& nickname,
const MacAddress& preferred_mac = NoPreferredMac);
const MacAddress& preferred_mac = NoPreferredMac,
const std::string& password = "");
/**
* Extracts a MAC Address from a received ENet packet.
@ -161,6 +163,9 @@ void RoomMember::RoomMemberImpl::MemberLoop() {
case IdVersionMismatch:
SetState(State::WrongVersion);
break;
case IdWrongPassword:
SetState(State::WrongPassword);
break;
case IdCloseRoom:
SetState(State::LostConnection);
break;
@ -196,12 +201,14 @@ void RoomMember::RoomMemberImpl::Send(Packet&& packet) {
}
void RoomMember::RoomMemberImpl::SendJoinRequest(const std::string& nickname,
const MacAddress& preferred_mac) {
const MacAddress& preferred_mac,
const std::string& password) {
Packet packet;
packet << static_cast<u8>(IdJoinRequest);
packet << nickname;
packet << preferred_mac;
packet << network_version;
packet << password;
Send(std::move(packet));
}
@ -215,8 +222,13 @@ void RoomMember::RoomMemberImpl::HandleRoomInformationPacket(const ENetEvent* ev
RoomInformation info{};
packet >> info.name;
packet >> info.member_slots;
packet >> info.uid;
packet >> info.port;
packet >> info.preferred_game;
room_information.name = info.name;
room_information.member_slots = info.member_slots;
room_information.port = info.port;
room_information.preferred_game = info.preferred_game;
u32 num_members;
packet >> num_members;
@ -260,10 +272,6 @@ void RoomMember::RoomMemberImpl::HandleWifiPackets(const ENetEvent* event) {
packet >> wifi_packet.channel;
packet >> wifi_packet.transmitter_address;
packet >> wifi_packet.destination_address;
u32 data_length;
packet >> data_length;
packet >> wifi_packet.data;
Invoke<WifiPacket>(wifi_packet);
@ -348,14 +356,13 @@ RoomMember::CallbackHandle<T> RoomMember::RoomMemberImpl::Bind(
}
// RoomMember
RoomMember::RoomMember() : room_member_impl{std::make_unique<RoomMemberImpl>()} {
room_member_impl->client = enet_host_create(nullptr, 1, NumChannels, 0, 0);
ASSERT_MSG(room_member_impl->client != nullptr, "Could not create client");
}
RoomMember::RoomMember() : room_member_impl{std::make_unique<RoomMemberImpl>()} {}
RoomMember::~RoomMember() {
ASSERT_MSG(!IsConnected(), "RoomMember is being destroyed while connected");
enet_host_destroy(room_member_impl->client);
if (room_member_impl->loop_thread) {
Leave();
}
}
RoomMember::State RoomMember::GetState() const {
@ -380,18 +387,22 @@ RoomInformation RoomMember::GetRoomInformation() const {
}
void RoomMember::Join(const std::string& nick, const char* server_addr, u16 server_port,
u16 client_port, const MacAddress& preferred_mac) {
u16 client_port, const MacAddress& preferred_mac,
const std::string& password) {
// If the member is connected, kill the connection first
if (room_member_impl->loop_thread && room_member_impl->loop_thread->joinable()) {
room_member_impl->SetState(State::Error);
room_member_impl->loop_thread->join();
room_member_impl->loop_thread.reset();
Leave();
}
// If the thread isn't running but the ptr still exists, reset it
else if (room_member_impl->loop_thread) {
room_member_impl->loop_thread.reset();
}
if (!room_member_impl->client) {
room_member_impl->client = enet_host_create(nullptr, 1, NumChannels, 0, 0);
ASSERT_MSG(room_member_impl->client != nullptr, "Could not create client");
}
ENetAddress address{};
enet_address_set_host(&address, server_addr);
address.port = server_port;
@ -409,9 +420,10 @@ void RoomMember::Join(const std::string& nick, const char* server_addr, u16 serv
room_member_impl->nickname = nick;
room_member_impl->SetState(State::Joining);
room_member_impl->StartLoop();
room_member_impl->SendJoinRequest(nick, preferred_mac);
room_member_impl->SendJoinRequest(nick, preferred_mac, password);
SendGameInfo(room_member_impl->current_game_info);
} else {
enet_peer_disconnect(room_member_impl->server, 0);
room_member_impl->SetState(State::CouldNotConnect);
}
}
@ -480,6 +492,9 @@ void RoomMember::Leave() {
room_member_impl->SetState(State::Idle);
room_member_impl->loop_thread->join();
room_member_impl->loop_thread.reset();
enet_host_destroy(room_member_impl->client);
room_member_impl->client = nullptr;
}
template void RoomMember::Unbind(CallbackHandle<WifiPacket>);

13
src/network/room_member.h
View file

@ -16,7 +16,13 @@ namespace Network {
/// Information about the received WiFi packets.
/// Acts as our own 802.11 header.
struct WifiPacket {
enum class PacketType : u8 { Beacon, Data, Authentication, AssociationResponse };
enum class PacketType : u8 {
Beacon,
Data,
Authentication,
AssociationResponse,
Deauthentication
};
PacketType type; ///< The type of 802.11 frame.
std::vector<u8> data; ///< Raw 802.11 frame data, starting at the management frame header
/// for management frames.
@ -49,6 +55,7 @@ public:
NameCollision, ///< Somebody is already using this name
MacCollision, ///< Somebody is already using that mac-address
WrongVersion, ///< The room version is not the same as for this RoomMember
WrongPassword, ///< The password doesn't match the one from the Room
CouldNotConnect ///< The room is not responding to a connection attempt
};
@ -109,8 +116,8 @@ public:
* This may fail if the username is already taken.
*/
void Join(const std::string& nickname, const char* server_addr = "127.0.0.1",
const u16 serverPort = DefaultRoomPort, const u16 clientPort = 0,
const MacAddress& preferred_mac = NoPreferredMac);
const u16 server_port = DefaultRoomPort, const u16 client_port = 0,
const MacAddress& preferred_mac = NoPreferredMac, const std::string& password = "");
/**
* Sends a WiFi packet to the room.