Don't accept multiple connections from the same peer

[alexdovzhanyn]

2 peers shouldn't be able to connect to more than one of each others handlers, this clogs up the network distribution and allows for a potential peer isolation attack.

Peers should check other handlers before accepting a connection, and reject a connection if there is another handler already talking to the peer which started a second connection.

[fantypants]

Updates?

[alexdovzhanyn]

This was semi-fixed for a while with a little hack i put together but ultimately i ended up removing it because of race conditions that caused too many crashes. Still something that needs to get fixes