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@ -25,6 +25,34 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
- in case of vulnerabilities.
-->
## [0.3.9] - 2019-09-27
### Added
- Yggdrasil will now complain more verbosely when a peer URI is incorrectly formatted
- Soft-shutdown methods have been added, allowing a node to shut down gracefully when terminated
- New multicast interval logic which sends multicast beacons more often when Yggdrasil is first started to increase the chance of finding nearby nodes quickly after startup
### Changed
- The switch now buffers packets more eagerly in an attempt to give the best link a chance to send, which appears to reduce packet reordering when crossing aggregate sets of peerings
- Substantial amounts of the codebase have been refactored to use the actor model, which should substantially reduce the chance of deadlocks
- Nonce tracking in sessions has been modified so that memory usage is reduced whilst still only allowing duplicate packets within a small window
- Soft-reconfiguration support has been simplified using new actor functions
- The garbage collector threshold has been adjusted for mobile builds
- The maximum queue size is now managed exclusively by the switch rather than by the core
### Fixed
- The broken `hjson-go` dependency which affected builds of the previous version has now been resolved in the module manifest
- Some minor memory leaks in the switch have been fixed, which improves memory usage on mobile builds
- A memory leak in the add-peer loop has been fixed
- The admin socket now reports the correct URI strings for SOCKS peers in `getPeers`
- A race condition when dialling a remote node by both the node address and routed prefix simultaneously has been fixed
- A race condition between the router and the dial code resulting in a panic has been fixed
- A panic which could occur when the TUN/TAP interface disappears (e.g. during soft-shutdown) has been fixed
- A bug in the semantic versioning script which accompanies Yggdrasil for builds has been fixed
- A panic which could occur when the TUN/TAP interface reads an undersized/corrupted packet has been fixed
### Removed
- A number of legacy debug functions have now been removed and a number of exported API functions are now better documented
## [0.3.8] - 2019-08-21
### Changed
- Yggdrasil can now send multiple packets from the switch at once, which results in improved throughput with smaller packets or lower MTUs
@ -39,12 +67,14 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
- New nonce tracking should help to reduce the number of packets dropped as a result of multiple/aggregate paths or congestion control in the switch
### Fixed
- **Security vulnerability**: Address verification was not strict enough, which could result in a malicious session sending traffic with unexpected or spoofed source or destination addresses which Yggdrasil could fail to reject
- Versions `0.3.6` and `0.3.7` are vulnerable - users of these versions should upgrade as soon as possible
- Versions `0.3.5` and earlier are not affected
- A deadlock was fixed in the session code which could result in Yggdrasil failing to pass traffic after some time
## [0.3.7] - 2019-08-18
### Security
- Address verification was not strict enough, which could result in a malicious session sending traffic with unexpected or spoofed source or destination addresses which Yggdrasil could fail to reject
- Versions `0.3.6` and `0.3.7` are vulnerable - users of these versions should upgrade as soon as possible
- Versions `0.3.5` and earlier are not affected
## [0.3.7] - 2019-08-14
### Changed
- The switch should now forward packets along a single path more consistently in cases where congestion is low and multiple equal-length paths exist, which should improve stability and result in fewer out-of-order packets
- Sessions should now be more tolerant of out-of-order packets, by replacing a bitmask with a variable sized heap+map structure to track recently received nonces, which should reduce the number of packets dropped due to reordering when multiple paths are used or multiple independent flows are transmitted through the same session