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Update changelog for v0.3.16 release (#769)
* draft of changelog * more changelog
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CHANGELOG.md
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CHANGELOG.md
@ -25,6 +25,31 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
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- in case of vulnerabilities.
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- in case of vulnerabilities.
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-->
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-->
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## [0.3.16] - 2021-03-18
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### Added
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- New simulation code under `cmd/yggdrasilsim` (work-in-progress)
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### Changed
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- Multi-threading in the switch
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- Swich lookups happen independently for each (incoming) peer connection, instead of being funneled to a single dedicated switch worker
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- Packets are queued for each (outgoing) peer connection, instead of being handled by a single dedicated switch worker
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- Queue logic rewritten
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- Heap structure per peer that traffic is routed to, with one FIFO queue per traffic flow
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- The total size of each heap is configured automatically (we basically queue packets until we think we're blocked on a socket write)
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- When adding to a full heap, the oldest packet from the largest queue is dropped
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- Packets are popped from the queue in FIFO order (oldest packet from among all queues in the heap) to prevent packet reordering at the session level
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- Removed global `sync.Pool` of `[]byte`
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- Local `sync.Pool`s are used in the hot loops, but not exported, to avoid memory corruption if libraries are reused by other projects
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- This may increase allocations (and slightly reduce speed in CPU-bound benchmarks) when interacting with the tun/tap device, but traffic forwarded at the switch layer should be unaffected
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- Upgrade dependencies
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- Upgrade build to Go 1.16
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### Fixed
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- Fixed a bug where the connection listener could exit prematurely due to resoruce exhaustion (if e.g. too many connections were opened)
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- Fixed DefaultIfName for OpenBSD (`/dev/tun0` -> `tun0`)
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- Fixed an issue where a peer could sometimes never be added to the switch
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- Fixed a goroutine leak that could occur if a peer with an open connection continued to spam additional connection attempts
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## [0.3.15] - 2020-09-27
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## [0.3.15] - 2020-09-27
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### Added
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### Added
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- Support for pinning remote public keys in peering strings has been added, e.g.
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- Support for pinning remote public keys in peering strings has been added, e.g.
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