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Code Issues Releases Activity

Don't try to parse packets identified as UPnP responses even when UPnP response parsing fails

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lidgren
2014-10-10 15:55:55 +00:00
parent 0d2955637d
commit 2b9135b312
1 changed files with 11 additions and 5 deletions
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16
Lidgren.Network/NetPeer.Internal.cs
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@@ -458,21 +458,27 @@ namespace Lidgren.Network
IPEndPoint ipsender = (IPEndPoint)m_senderRemote; IPEndPoint ipsender = (IPEndPoint)m_senderRemote;
if (m_upnp != null && now < m_upnp.m_discoveryResponseDeadline) if (m_upnp != null && now < m_upnp.m_discoveryResponseDeadline && bytesReceived > 32)
{ {
// is this an UPnP response? // is this an UPnP response?
try string resp = System.Text.Encoding.ASCII.GetString(m_receiveBuffer, 0, bytesReceived);
if (resp.Contains("upnp:rootdevice") || resp.Contains("UPnP/1.0"))
{ {
string resp = System.Text.Encoding.ASCII.GetString(m_receiveBuffer, 0, bytesReceived); try
if (resp.Contains("upnp:rootdevice") || resp.Contains("UPnP/1.0"))
{ {
resp = resp.Substring(resp.ToLower().IndexOf("location:") + 9); resp = resp.Substring(resp.ToLower().IndexOf("location:") + 9);
resp = resp.Substring(0, resp.IndexOf("\r")).Trim(); resp = resp.Substring(0, resp.IndexOf("\r")).Trim();
m_upnp.ExtractServiceUrl(resp); m_upnp.ExtractServiceUrl(resp);
return; return;
} }
catch (Exception ex)
{
LogDebug("Failed to parse UPnP response: " + ex.ToString());
// don't try to parse this packet further
return;
}
} }
catch { }
} }
NetConnection sender = null; NetConnection sender = null;