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verify session and agent ids earlier in udp packet processing

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UbitUmarov
2024-04-25 00:45:21 +01:00
parent 3e9258e371
commit 800f47d718
2 changed files with 23 additions and 573 deletions
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586
OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
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10
OpenSim/Region/ClientStack/Linden/UDP/LLUDPServer.cs
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@@ -1285,7 +1285,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
FreeUDPBuffer(buffer);
// Determine which agent this packet came from
if (client == null || client is not LLClientView)
if (client == null || client is not LLClientView lclient)
{
//m_log.Debug("[LLUDPSERVER]: Received a " + packet.Type + " packet from an unrecognized source: " + address + " in " + m_scene.RegionInfo.RegionName);
@@ -1298,7 +1298,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
return;
}
LLUDPClient udpClient = ((LLClientView)client).UDPClient;
LLUDPClient udpClient = lclient.UDPClient;
if (!udpClient.IsConnected)
{
@@ -1314,6 +1314,12 @@ namespace OpenSim.Region.ClientStack.LindenUDP
int now = Environment.TickCount & Int32.MaxValue;
udpClient.TickLastPacketReceived = now;
if(packet.NeedValidateIDs)
{
if(!packet.ValidIDs(lclient.m_sessionId, lclient.m_agentId))
return;
}
#region ACK Receiving
// Handle appended ACKs