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Network: Send the game title

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This commit is contained in:
B3n30 2017-07-09 15:06:02 +02:00
parent 42e57c1218
commit 859be35d54
6 changed files with 185 additions and 114 deletions
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10
src/network/packet.cpp
View file

@ -13,10 +13,6 @@
namespace Network {
Packet::Packet() : read_pos(0), is_valid(true) {}
Packet::~Packet() {}
void Packet::Append(const void* in_data, std::size_t size_in_bytes) {
if (in_data && (size_in_bytes > 0)) {
std::size_t start = data.size();
@ -39,7 +35,7 @@ void Packet::Clear() {
}
const void* Packet::GetData() const {
return !data.empty() ? &data[0] : NULL;
return !data.empty() ? &data[0] : nullptr;
}
void Packet::IgnoreBytes(u32 length) {
@ -54,8 +50,8 @@ bool Packet::EndOfPacket() const {
return read_pos >= data.size();
}
Packet::operator BoolType() const {
return is_valid ? &Packet::CheckSize : NULL;
Packet::operator bool() const {
return is_valid ? &Packet::CheckSize : nullptr;
}
Packet& Packet::operator>>(bool& out_data) {

64
src/network/packet.h
View file

@ -10,14 +10,11 @@
namespace Network {
/// A class for serialize data for network transfer. It also handles endianess
/// A class that serializes data for network transfer. It also handles endianess
class Packet {
/// A bool-like type that cannot be converted to integer or pointer types
typedef bool (Packet::*BoolType)(std::size_t);
public:
Packet();
~Packet();
Packet() = default;
~Packet() = default;
/**
* Append data to the end of the packet
@ -64,41 +61,8 @@ public:
* @return True if all data was read, false otherwise
*/
bool EndOfPacket() const;
/**
* Test the validity of the packet, for reading
* This operator allows to test the packet as a boolean
* variable, to check if a reading operation was successful.
*
* A packet will be in an invalid state if it has no more
* data to read.
*
* This behaviour is the same as standard C++ streams.
*
* Usage example:
* @code
* float x;
* packet >> x;
* if (packet)
* {
* // ok, x was extracted successfully
* }
*
* // -- or --
*
* float x;
* if (packet >> x)
* {
* // ok, x was extracted successfully
* }
* @endcode
*
* Don't focus on the return type, it's equivalent to bool but
* it disallows unwanted implicit conversions to integer or
* pointer types.
*
* @return True if last data extraction from packet was successful
*/
operator BoolType() const;
explicit operator bool() const;
/// Overloads of operator >> to read data from the packet
Packet& operator>>(bool& out_data);
@ -135,10 +99,6 @@ public:
Packet& operator<<(const std::array<T, S>& data);
private:
/// Disallow comparisons between packets
bool operator==(const Packet& right) const;
bool operator!=(const Packet& right) const;
/**
* Check if the packet can extract a given number of bytes
* This function updates accordingly the state of the packet.
@ -148,14 +108,14 @@ private:
bool CheckSize(std::size_t size);
// Member data
std::vector<char> data; ///< Data stored in the packet
std::size_t read_pos; ///< Current reading position in the packet
bool is_valid; ///< Reading state of the packet
std::vector<char> data; ///< Data stored in the packet
std::size_t read_pos = 0; ///< Current reading position in the packet
bool is_valid = true; ///< Reading state of the packet
};
template <typename T>
Packet& Packet::operator>>(std::vector<T>& out_data) {
for (u32 i = 0; i < out_data.size(); ++i) {
for (std::size_t i = 0; i < out_data.size(); ++i) {
T character = 0;
*this >> character;
out_data[i] = character;
@ -165,7 +125,7 @@ Packet& Packet::operator>>(std::vector<T>& out_data) {
template <typename T, std::size_t S>
Packet& Packet::operator>>(std::array<T, S>& out_data) {
for (u32 i = 0; i < out_data.size(); ++i) {
for (std::size_t i = 0; i < out_data.size(); ++i) {
T character = 0;
*this >> character;
out_data[i] = character;
@ -175,7 +135,7 @@ Packet& Packet::operator>>(std::array<T, S>& out_data) {
template <typename T>
Packet& Packet::operator<<(const std::vector<T>& in_data) {
for (u32 i = 0; i < in_data.size(); ++i) {
for (std::size_t i = 0; i < in_data.size(); ++i) {
*this << in_data[i];
}
return *this;
@ -183,7 +143,7 @@ Packet& Packet::operator<<(const std::vector<T>& in_data) {
template <typename T, std::size_t S>
Packet& Packet::operator<<(const std::array<T, S>& in_data) {
for (u32 i = 0; i < in_data.size(); ++i) {
for (std::size_t i = 0; i < in_data.size(); ++i) {
*this << in_data[i];
}
return *this;

94
src/network/room.cpp
View file

@ -85,8 +85,8 @@ public:
* The packet has the structure:
* <MessageID>ID_ROOM_INFORMATION
* <String> room_name
* <uint32_t> member_slots: The max number of clients allowed in this room
* <uint32_t> num_members: the number of currently joined clients
* <u32> member_slots: The max number of clients allowed in this room
* <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
* <MacAddress> mac_address of that member
@ -112,6 +112,12 @@ public:
*/
void HandleChatPacket(const ENetEvent* event);
/**
* Extracts the game name from a received ENet packet and broadcasts it.
* @param event The ENet event that was received.
*/
void HandleGameNamePacket(const ENetEvent* event);
/**
* Removes the client from the members list if it was in it and announces the change
* to all other clients.
@ -130,7 +136,9 @@ void Room::RoomImpl::ServerLoop() {
case IdJoinRequest:
HandleJoinRequest(&event);
break;
// TODO(B3N30): Handle the other message types
case IdSetGameName:
HandleGameNamePacket(&event);
break;
case IdWifiPacket:
HandleWifiPacket(&event);
break;
@ -184,7 +192,7 @@ void Room::RoomImpl::HandleJoinRequest(const ENetEvent* event) {
member.nickname = nickname;
member.peer = event->peer;
members.push_back(member);
members.push_back(std::move(member));
// Notify everyone that the room information has changed.
BroadcastRoomInformation();
@ -194,22 +202,14 @@ void Room::RoomImpl::HandleJoinRequest(const ENetEvent* event) {
bool Room::RoomImpl::IsValidNickname(const std::string& nickname) const {
// A nickname is valid if it is not already taken by anybody else in the room.
// TODO(B3N30): Check for empty names, spaces, etc.
for (const Member& member : members) {
if (member.nickname == nickname) {
return false;
}
}
return true;
return std::all_of(members.begin(), members.end(),
[&nickname](const auto& member) { return member.nickname != nickname; });
}
bool Room::RoomImpl::IsValidMacAddress(const MacAddress& address) const {
// A MAC address is valid if it is not already taken by anybody else in the room.
for (const Member& member : members) {
if (member.mac_address == address) {
return false;
}
}
return true;
return std::all_of(members.begin(), members.end(),
[&address](const auto& member) { return member.mac_address != address; });
}
void Room::RoomImpl::SendNameCollision(ENetPeer* client) {
@ -248,7 +248,7 @@ void Room::RoomImpl::BroadcastRoomInformation() {
packet << room_information.name;
packet << room_information.member_slots;
packet << static_cast<uint32_t>(members.size());
packet << static_cast<u32>(members.size());
for (const auto& member : members) {
packet << member.nickname;
packet << member.mac_address;
@ -262,10 +262,11 @@ void Room::RoomImpl::BroadcastRoomInformation() {
}
MacAddress Room::RoomImpl::GenerateMacAddress() {
MacAddress result_mac = NintendoOUI;
MacAddress result_mac =
NintendoOUI; // The first three bytes of each MAC address will be the NintendoOUI
std::uniform_int_distribution<> dis(0x00, 0xFF); // Random byte between 0 and 0xFF
do {
for (int i = 3; i < result_mac.size(); ++i) {
for (size_t i = 3; i < result_mac.size(); ++i) {
result_mac[i] = dis(random_gen);
}
} while (!IsValidMacAddress(result_mac));
@ -273,9 +274,33 @@ MacAddress Room::RoomImpl::GenerateMacAddress() {
}
void Room::RoomImpl::HandleWifiPacket(const ENetEvent* event) {
for (auto it = members.begin(); it != members.end(); ++it) {
if (it->peer != event->peer)
enet_peer_send(it->peer, 0, event->packet);
Packet in_packet;
in_packet.Append(event->packet->data, event->packet->dataLength);
in_packet.IgnoreBytes(sizeof(MessageID));
in_packet.IgnoreBytes(sizeof(u8)); // WifiPacket Type
in_packet.IgnoreBytes(sizeof(u8)); // WifiPacket Channel
in_packet.IgnoreBytes(sizeof(MacAddress)); // WifiPacket Transmitter Address
MacAddress destination_address;
in_packet >> destination_address;
Packet out_packet;
out_packet.Append(event->packet->data, event->packet->dataLength);
ENetPacket* enet_packet = enet_packet_create(out_packet.GetData(), out_packet.GetDataSize(),
ENET_PACKET_FLAG_RELIABLE);
if (destination_address == BroadcastMac) { // Send the data to everyone except the sender
for (const auto& member : members) {
if (member.peer != event->peer)
enet_peer_send(member.peer, 0, event->packet);
}
} else { // Send the data only to the destination client
auto member = std::find_if(members.begin(), members.end(),
[destination_address](const Member& member) -> bool {
return member.mac_address == destination_address;
});
if (member != members.end()) {
enet_peer_send(member->peer, 0, enet_packet);
}
}
enet_host_flush(server);
}
@ -287,7 +312,7 @@ void Room::RoomImpl::HandleChatPacket(const ENetEvent* event) {
in_packet.IgnoreBytes(sizeof(MessageID));
std::string message;
in_packet >> message;
auto CompareNetworkAddress = [&](const Member member) -> bool {
auto CompareNetworkAddress = [event](const Member member) -> bool {
return member.peer == event->peer;
};
const auto sending_member = std::find_if(members.begin(), members.end(), CompareNetworkAddress);
@ -309,13 +334,30 @@ void Room::RoomImpl::HandleChatPacket(const ENetEvent* event) {
enet_host_flush(server);
}
void Room::RoomImpl::HandleGameNamePacket(const ENetEvent* event) {
Packet in_packet;
in_packet.Append(event->packet->data, event->packet->dataLength);
in_packet.IgnoreBytes(sizeof(MessageID));
std::string game_name;
in_packet >> game_name;
auto member =
std::find_if(members.begin(), members.end(),
[event](const Member& member) -> bool { return member.peer == event->peer; });
if (member != members.end()) {
member->game_name = game_name;
BroadcastRoomInformation();
}
}
void Room::RoomImpl::HandleClientDisconnection(ENetPeer* client) {
// Remove the client from the members list.
members.erase(std::remove_if(members.begin(), members.end(),
[&](const Member& member) { return member.peer == client; }),
[client](const Member& member) { return member.peer == client; }),
members.end());
// Announce the change to all clients.
enet_peer_disconnect(client, 0);
BroadcastRoomInformation();
}
@ -327,7 +369,6 @@ Room::~Room() = default;
void Room::Create(const std::string& name, const std::string& server_address, u16 server_port) {
ENetAddress address;
address.host = ENET_HOST_ANY;
enet_address_set_host(&address, server_address.c_str());
address.port = server_port;
room_impl->server = enet_host_create(&address, MaxConcurrentConnections, NumChannels, 0, 0);
@ -357,6 +398,9 @@ void Room::Destroy() {
}
room_impl->room_information = {};
room_impl->server = nullptr;
room_impl->members.clear();
room_impl->room_information.member_slots = 0;
room_impl->room_information.name.clear();
}
} // namespace Network

7
src/network/room.h
View file

@ -19,13 +19,16 @@ struct RoomInformation {
u32 member_slots; ///< Maximum number of members in this room
};
using MacAddress = std::array<uint8_t, 6>;
using MacAddress = std::array<u8, 6>;
/// A special MAC address that tells the room we're joining to assign us a MAC address
/// automatically.
const MacAddress NoPreferredMac = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
// 802.11 broadcast MAC address
constexpr MacAddress BroadcastMac = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF};
// The different types of messages that can be sent. The first byte of each packet defines the type
typedef uint8_t MessageID;
using MessageID = u8;
enum RoomMessageTypes {
IdJoinRequest = 1,
IdJoinSuccess,

97
src/network/room_member.cpp
View file

@ -74,6 +74,11 @@ public:
* @param event The ENet event that was received.
*/
void HandleChatPacket(const ENetEvent* event);
/**
* Disconnects the RoomMember from the Room
*/
void Disconnect();
};
// RoomMemberImpl
@ -92,7 +97,8 @@ void RoomMember::RoomMemberImpl::ReceiveLoop() {
std::lock_guard<std::mutex> lock(network_mutex);
ENetEvent event;
if (enet_host_service(client, &event, 1000) > 0) {
if (event.type == ENET_EVENT_TYPE_RECEIVE) {
switch (event.type) {
case ENET_EVENT_TYPE_RECEIVE:
switch (event.packet->data[0]) {
// TODO(B3N30): Handle the other message types
case IdChatMessage:
@ -111,25 +117,21 @@ void RoomMember::RoomMemberImpl::ReceiveLoop() {
break;
case IdNameCollision:
SetState(State::NameCollision);
enet_packet_destroy(event.packet);
enet_peer_disconnect(server, 0);
enet_peer_reset(server);
return;
break;
case IdMacCollision:
SetState(State::MacCollision);
enet_packet_destroy(event.packet);
enet_peer_disconnect(server, 0);
enet_peer_reset(server);
return;
break;
default:
break;
}
enet_packet_destroy(event.packet);
break;
case ENET_EVENT_TYPE_DISCONNECT:
SetState(State::LostConnection);
}
}
}
Disconnect();
};
void RoomMember::RoomMemberImpl::StartLoop() {
@ -137,6 +139,7 @@ void RoomMember::RoomMemberImpl::StartLoop() {
}
void RoomMember::RoomMemberImpl::Send(Packet& packet) {
std::lock_guard<std::mutex> lock(network_mutex);
ENetPacket* enetPacket =
enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
enet_peer_send(server, 0, enetPacket);
@ -165,7 +168,7 @@ void RoomMember::RoomMemberImpl::HandleRoomInformationPacket(const ENetEvent* ev
room_information.name = info.name;
room_information.member_slots = info.member_slots;
uint32_t num_members;
u32 num_members;
packet >> num_members;
member_information.resize(num_members);
@ -198,7 +201,7 @@ void RoomMember::RoomMemberImpl::HandleWifiPackets(const ENetEvent* event) {
packet.IgnoreBytes(sizeof(MessageID));
// Parse the WifiPacket from the BitStream
uint8_t frame_type;
u8 frame_type;
packet >> frame_type;
WifiPacket::PacketType type = static_cast<WifiPacket::PacketType>(frame_type);
@ -207,10 +210,10 @@ void RoomMember::RoomMemberImpl::HandleWifiPackets(const ENetEvent* event) {
packet >> wifi_packet.transmitter_address;
packet >> wifi_packet.destination_address;
uint32_t data_length;
u32 data_length;
packet >> data_length;
std::vector<uint8_t> data(data_length);
std::vector<u8> data(data_length);
packet >> data;
wifi_packet.data = std::move(data);
@ -230,6 +233,33 @@ void RoomMember::RoomMemberImpl::HandleChatPacket(const ENetEvent* event) {
// TODO(B3N30): Invoke callbacks
}
void RoomMember::RoomMemberImpl::Disconnect() {
member_information.clear();
room_information.member_slots = 0;
room_information.name.clear();
if (server) {
enet_peer_disconnect(server, 0);
} else {
return;
}
ENetEvent event;
while (enet_host_service(client, &event, ConnectionTimeoutMs) > 0) {
switch (event.type) {
case ENET_EVENT_TYPE_RECEIVE:
enet_packet_destroy(event.packet); // Ignore all incoming data
break;
case ENET_EVENT_TYPE_DISCONNECT:
server = nullptr;
return;
}
}
// didn't disconnect gracefully force disconnect
enet_peer_reset(server);
server = nullptr;
}
// RoomMember
RoomMember::RoomMember() : room_member_impl{std::make_unique<RoomMemberImpl>()} {
room_member_impl->client = enet_host_create(nullptr, 1, NumChannels, 0, 0);
@ -249,16 +279,36 @@ const RoomMember::MemberList& RoomMember::GetMemberInformation() const {
return room_member_impl->member_information;
}
const std::string& RoomMember::GetNickname() const {
return room_member_impl->nickname;
}
const MacAddress& RoomMember::GetMacAddress() const {
if (GetState() == State::Joined)
return room_member_impl->mac_address;
return MacAddress{};
}
RoomInformation RoomMember::GetRoomInformation() const {
return room_member_impl->room_information;
}
void RoomMember::Join(const std::string& nick, const char* server_addr, u16 server_port,
u16 client_port) {
// If the member is connected, kill the connection first
if (room_member_impl->receive_thread && room_member_impl->receive_thread->joinable()) {
room_member_impl->SetState(State::Error);
room_member_impl->receive_thread->join();
room_member_impl->receive_thread.reset();
}
// If the thread isn't running but the ptr still exists, reset it
else if (room_member_impl->receive_thread) {
room_member_impl->receive_thread.reset();
}
ENetAddress address{};
enet_address_set_host(&address, server_addr);
address.port = server_port;
room_member_impl->server =
enet_host_connect(room_member_impl->client, &address, NumChannels, 0);
@ -286,11 +336,11 @@ bool RoomMember::IsConnected() const {
void RoomMember::SendWifiPacket(const WifiPacket& wifi_packet) {
Packet packet;
packet << static_cast<MessageID>(IdWifiPacket);
packet << static_cast<uint8_t>(wifi_packet.type);
packet << static_cast<u8>(wifi_packet.type);
packet << wifi_packet.channel;
packet << wifi_packet.transmitter_address;
packet << wifi_packet.destination_address;
packet << static_cast<uint32_t>(wifi_packet.data.size());
packet << static_cast<u32>(wifi_packet.data.size());
packet << wifi_packet.data;
room_member_impl->Send(packet);
}
@ -302,16 +352,17 @@ void RoomMember::SendChatMessage(const std::string& message) {
room_member_impl->Send(packet);
}
void RoomMember::SendGameName(const std::string& game_name) {
Packet packet;
packet << static_cast<MessageID>(IdSetGameName);
packet << game_name;
room_member_impl->Send(packet);
}
void RoomMember::Leave() {
ASSERT_MSG(room_member_impl->receive_thread != nullptr, "Must be in a room to leave it.");
{
std::lock_guard<std::mutex> lock(room_member_impl->network_mutex);
enet_peer_disconnect(room_member_impl->server, 0);
room_member_impl->SetState(State::Idle);
}
room_member_impl->SetState(State::Idle);
room_member_impl->receive_thread->join();
room_member_impl->receive_thread.reset();
enet_peer_reset(room_member_impl->server);
}
} // namespace Network

27
src/network/room_member.h
View file

@ -15,13 +15,13 @@ namespace Network {
/// Information about the received WiFi packets.
/// Acts as our own 802.11 header.
struct WifiPacket {
enum class PacketType { Beacon, Data, Management };
PacketType type; ///< The type of 802.11 frame, Beacon / Data.
std::vector<uint8_t> data; ///< Raw 802.11 frame data, starting at the management frame header
/// for management frames.
enum class PacketType { Beacon, Data, Authentication, AssociationResponse };
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.
MacAddress transmitter_address; ///< Mac address of the transmitter.
MacAddress destination_address; ///< Mac address of the receiver.
uint8_t channel; ///< WiFi channel where this frame was transmitted.
u8 channel; ///< WiFi channel where this frame was transmitted.
};
/// Represents a chat message.
@ -70,6 +70,17 @@ public:
* Returns information about the members in the room we're currently connected to.
*/
const MemberList& GetMemberInformation() const;
/**
* Returns the nickname of the RoomMember.
*/
const std::string& GetNickname() const;
/**
* Returns the MAC address of the RoomMember.
*/
const MacAddress& GetMacAddress() const;
/**
* Returns information about the room we're currently connected to.
*/
@ -99,6 +110,12 @@ public:
*/
void SendChatMessage(const std::string& message);
/**
* Sends the current game name to the room.
* @param game_name The game name.
*/
void SendGameName(const std::string& game_name);
/**
* Leaves the current room.
*/