com.unity.transport 1.0.0-pre.6 Package Notes

Added heartbeats functionality to all protocols (enabled by default). If there's no traffic on a connection for some time, a heartbeat is automatically sent to keep the connection alive. The inactivity timeout is controlled by the new parameter `heartbeatTimeoutMS` in `NetworkConfigParameter`. Setting it to 0 disables the feature.

Added `heartbeatTimeoutMS` in `NetworkConfigParameter` to support heartbeats (see above).
`NetworkDriver.Bind` is now synchronous when using Relay (matches behavior of other protocols).
`NetworkDriver.Bind` is not required to be called anymore for Relay clients (only for host).
`EndSend` will now return an error if called with a writer that has failed writes.
MTU decreased to 1384 (from 1400) on Xbox platforms.
`Connect` will automatically bind the driver if not already bound. This was already done implicitly before, but now it's explicit (the `NetworkDriver.Bound` property will be true after a successful call to `Connect`).
Added `DataStream.ReadLong`

Fixed: Receiving a Disconnect message on DTLS would crash the receive job
Fixed: TLS server name might be set to nothing in Relay+DTLS, causing the handshake to fail
Fixed: Couldn't send large messages on fragmented pipeline if `requiredPayloadSize` was not provided to `BeginSend`
Fixed: DTLS handshake messages were never resent if lost
Fixed: Clients wouldn't honor the endpoint their were bound to

Function pointers (for instance in `BeginSend` and `EndSend`) generate GC allocations in non-Burst use cases. The issue will be fixed in the next releases
XboxOne(S/X) crash when using fragmentation pipeline when the size of the packet is within 100 bytes of the MTU. This will be fixed in the next release

com.unity.transport 1.0.0-pre.6