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Fix server getting completely choked up on even a little of DoS

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* If client count is unbearable, immediately delete denied clients
* Re-prioritize the checking order of things about incoming clients
* Remove a huge CPU-wasting exception in ReliablePacketBuffer
This commit is contained in:
Perttu Ahola 2013-08-04 08:17:07 +03:00
parent 8831669505
commit e6687be493
4 changed files with 229 additions and 168 deletions
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16
src/server.h
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@ -250,6 +250,8 @@ public:
bool definitions_sent;
bool denied;
RemoteClient():
m_time_from_building(9999),
m_excess_gotblocks(0)
@ -259,6 +261,7 @@ public:
net_proto_version = 0;
pending_serialization_version = SER_FMT_VER_INVALID;
definitions_sent = false;
denied = false;
m_nearest_unsent_d = 0;
m_nearest_unsent_reset_timer = 0.0;
m_nothing_to_send_counter = 0;
@ -589,7 +592,7 @@ private:
void SendHUDChange(u16 peer_id, u32 id, HudElementStat stat, void *value);
void SendHUDSetFlags(u16 peer_id, u32 flags, u32 mask);
void SendHUDSetParam(u16 peer_id, u16 param, const std::string &value);
/*
Send a node removal/addition event to all clients except ignore_id.
Additionally, if far_players!=NULL, players further away than
@ -658,11 +661,20 @@ private:
void DiePlayer(u16 peer_id);
void RespawnPlayer(u16 peer_id);
void DenyAccess(u16 peer_id, const std::wstring &reason);
enum ClientDeletionReason {
CDR_LEAVE,
CDR_TIMEOUT,
CDR_DENY
};
void DeleteClient(u16 peer_id, ClientDeletionReason reason);
void UpdateCrafting(u16 peer_id);
// When called, connection mutex should be locked
RemoteClient* getClient(u16 peer_id);
RemoteClient* getClientNoEx(u16 peer_id);
// When called, environment mutex should be locked
std::string getPlayerName(u16 peer_id)
@ -737,7 +749,7 @@ private:
std::map<u16, RemoteClient*> m_clients;
u16 m_clients_number; //for announcing masterserver
// Bann checking
// Ban checking
BanManager m_banmanager;
// Rollback manager (behind m_env_mutex)