* improve tracing of message exchange
run e.g. as
```
nim c -r -d:debug -d:chronicles_enabled=on -d:chronicles_log_level=TRACE -d:chronicles_sinks=textlines[nocolors,stdout] tests/dht/test_providers.nim >err
```
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
* add debug on Handshake timeour
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
* queue messages during handshake and send later
If a handshake was already in progress, messages were dropped.
Instead of this, it is better to queue these and send as soon
as the handshake is finished and thus the encryption key is known.
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
* rename handshakeInProgress to keyexchangeInProgress
Handshake is also a name of a message, which makes previous
name less clear.
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
* keyexchangeInProgress: do not remove on handshake received
This is the wrong direction, not needed
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
* fix cross-connect key exchange
Since key exchange can be started both ways simultaneously, and
these might not get finalised with UDP transport, we can't be
sure what encryption key will be used by the other side:
- the one derived in the key-exchange started by us,
- the one derived in the key-exchange started by the other node.
To alleviate this issue, we store two decryption keys in each session.
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
---------
Signed-off-by: Csaba Kiraly <csaba.kiraly@gmail.com>
