oss/luanti
oss/luanti
1
0
Fork 0
mirror of https://github.com/luanti-org/luanti.git synced 2025-07-22 17:18:39 +00:00
Code Wiki Activity

Track connection half-open state

Browse source
This commit is contained in:
sfan5 2024-01-05 00:31:14 +01:00
parent 2ea8d9ca11
commit db88d24ff8
4 changed files with 119 additions and 40 deletions
Download patch file Download diff file Expand all files Collapse all files

18
src/network/connection.h
View file

@ -313,7 +313,8 @@ enum ConnectionCommandType{
CONNCMD_SEND,
CONNCMD_SEND_TO_ALL,
CONCMD_ACK,
CONCMD_CREATE_PEER
CONCMD_CREATE_PEER,
CONNCMD_RESEND_ONE
};
struct ConnectionCommand;
@ -336,6 +337,7 @@ struct ConnectionCommand
static ConnectionCommandPtr connect(Address address);
static ConnectionCommandPtr disconnect();
static ConnectionCommandPtr disconnect_peer(session_t peer_id);
static ConnectionCommandPtr resend_one(session_t peer_id);
static ConnectionCommandPtr send(session_t peer_id, u8 channelnum, NetworkPacket *pkt, bool reliable);
static ConnectionCommandPtr ack(session_t peer_id, u8 channelnum, const Buffer<u8> &data);
static ConnectionCommandPtr createPeer(session_t peer_id, const Buffer<u8> &data);
@ -520,6 +522,9 @@ class Peer {
void ResetTimeout()
{MutexAutoLock lock(m_exclusive_access_mutex); m_timeout_counter = 0.0; };
bool isHalfOpen() const { return m_half_open; }
void SetFullyOpen() { m_half_open = false; }
bool isTimedOut(float timeout);
unsigned int m_increment_packets_remaining = 0;
@ -590,6 +595,15 @@ class Peer {
rttstats m_rtt;
float m_last_rtt = -1.0f;
/*
Until the peer has communicated with us using their assigned peer id
the connection is considered half-open.
During this time we inhibit re-sending any reliables or pings. This
is to avoid spending too many resources on a potential DoS attack
and to make sure Minetest servers are not useful for UDP amplificiation.
*/
bool m_half_open = true;
// current usage count
unsigned int m_usage = 0;
@ -736,6 +750,8 @@ protected:
void SetPeerID(session_t id) { m_peer_id = id; }
void doResendOne(session_t peer_id);
void sendAck(session_t peer_id, u8 channelnum, u16 seqnum);
std::vector<session_t> getPeerIDs()