/// <summary>
/// Method for handling a login request for a new client.
/// </summary>
/// <param name="id">The ID of the client.</param>
/// <param name="endPoint">The IP endpoint of the client.</param>
/// <param name="loginRequest">The LoginRequest packet data.</param>
/// <param name="updateManager">The update manager for the client.</param>
/// <returns>true if the login request was approved, false otherwise.</returns>
private bool OnLoginRequest(
ushort id,
IPEndPoint endPoint,
LoginRequest loginRequest,
ServerUpdateManager updateManager
)
{
Logger.Get().Info(this, $"Received login request from IP: {endPoint.Address}, username: {loginRequest.Username}");
if (_banList.IsIpBanned(endPoint.Address.ToString()) || _banList.Contains(loginRequest.AuthKey))
{
updateManager.SetLoginResponse(new LoginResponse {
LoginResponseStatus = LoginResponseStatus.Banned
});
return(false);
}
if (_whiteList.IsEnabled)
{
if (!_whiteList.Contains(loginRequest.AuthKey))
{
if (!_whiteList.IsPreListed(loginRequest.Username))
{
updateManager.SetLoginResponse(new LoginResponse {
LoginResponseStatus = LoginResponseStatus.NotWhiteListed
});
return(false);
}
Logger.Get().Info(this, " Username was pre-listed, auth key has been added to whitelist");
_whiteList.Add(loginRequest.AuthKey);
_whiteList.RemovePreList(loginRequest.Username);
}
}
// Check whether the username is not already in use
foreach (var existingPlayerData in _playerData.GetCopy().Values)
{
if (existingPlayerData.Username.ToLower().Equals(loginRequest.Username.ToLower()))
{
updateManager.SetLoginResponse(new LoginResponse {
LoginResponseStatus = LoginResponseStatus.InvalidUsername
});
return(false);
}
}
var addonData = loginRequest.AddonData;
// Construct a string that contains all addons and respective versions by mapping the items in the addon data
var addonStringList = string.Join(", ", addonData.Select(addon => $"{addon.Identifier} v{addon.Version}"));
Logger.Get().Info(this, $" Client tries to connect with following addons: {addonStringList}");
// If there is a mismatch between the number of networked addons of the client and the server,
// we can immediately invalidate the request
if (addonData.Count != AddonManager.GetNetworkedAddonData().Count)
{
HandleInvalidLoginAddons(updateManager);
return(false);
}
// Create a byte list denoting the order of the addons on the server
var addonOrder = new List <byte>();
foreach (var addon in addonData)
{
// Check and retrieve the server addon with the same name and version
if (!AddonManager.TryGetNetworkedAddon(
addon.Identifier,
addon.Version,
out var correspondingServerAddon
))
{
// There was no corresponding server addon, so we send a login response with an invalid status
// and the addon data that is present on the server, so the client knows what is invalid
HandleInvalidLoginAddons(updateManager);
return(false);
}
if (!correspondingServerAddon.Id.HasValue)
{
continue;
}
// If the addon is also present on the server, we append the addon order with the correct index
addonOrder.Add(correspondingServerAddon.Id.Value);
}
var loginResponse = new LoginResponse {
LoginResponseStatus = LoginResponseStatus.Success,
AddonOrder = addonOrder.ToArray()
};
updateManager.SetLoginResponse(loginResponse);
// Create new player data and store it
var playerData = new ServerPlayerData(
id,
endPoint.Address.ToString(),
loginRequest.Username,
loginRequest.AuthKey,
_authorizedList
);
_playerData[id] = playerData;
return(true);
}