v0.4.0

This release stabilizes the SSU2 transport and brings IPv6 support to both NTCP2 (#322) and SSU2 (#323). Simplified bandwidth metering has been implemented (#324) and the router configuration now supports specifying a bandwidth limit and a share percentage. The defaults are 1 MB/s and 90% (router class P).

PQ hybrid support has been implemented for destinations (#329), NTCP2 (#331) and SSU2 (#334). The crypto used by destinations can be controlled with i2cp.leaseSetEncType (default is 6,4). [ntcp2] and [ssu2] have ml_kem and disable_pq options which allow controlling the PQ-related behavior of the transports. See router configuration documentation for NTCP2 and SSU2 for more details.

Added

• ssu2: Implement peer test protocol (#266)
• sam: Add support for QUIT/EXIT/STOP (#268)
• cli: Implement RouterCommand::RouterUiDev (#301)
• ssu2: Introduce RelayManager (#306)
• ssu2: Implement support for fragmented RouterInfos (#318)
• ssu2: Add support for RouterInfo compression (#319)
• ntcp2: Implement idle timeouts (#321)
• ntcp2: Add IPv6 support (#322)
• ssu2: Add IPv6 support (#323)
• core: Implement simple bandwidth metering (#324)
• ssu2: Implement connection migration (#327)
• session: Add support for PQ Hybrid ECIES-x25519-AEAD-Ratchet (#329)
• ntcp2: Add support for PQ hybrid connections (#331)
• ssu2: Add support for PQ hybrid connections (#334)
• cli/socks: Add outproxy support (#335)

Changed

• core: Introduce SubsystemManager (#247)
• core: Add more metrics (#251)
• ssu2: Check clock skew (#252)
• docs: Improve router configuration documentation (#256)
• ssu2: Share R::UdpSocket between sessions (#257)
• streaming: Make opening a stream more aggressive (#262)
• core: Address warning about private macro usage (#270)
• core: Expose I2CP port in ProtocolAddressInfo (#271)
• ssu2: Refactor TransmissionManager (#274)
• transit: Close tunnels which have no activity after 2 minutes (#275)
• docs: Improve docs (#280)
• ci: Use nextest (#281)
• core: Decrease the time it takes to run tests by using tokio::test's start_paused (#282)
• Be precise when marking tests with start_paused, make investigation for #288 easier (#289)
• ssu2: Refactor Detector (#290)
• cli: Specify which client tunnel exited (#296)
• cli/http: Allow specifying HTTP Proxy tunnel lengths (#297)
• ssu2: Add support for parallel peer tests (#300)
• core: Use userspace CRNG seeded by a system RNG (#302)
• core: Add fuzzers for SAM, I2CP, SSU2 and NTCP2 (#307)
• primitives: Refactor RouterAddress (#309)
• ssu2: Request introducers if the router is firewalled (#313)
• transport: Add introducer support to TransportManager (#314)
• ssu2: Implement outbound relay support (#315)
• transport: Refactor firewall/external address handling (#316)
• transit: Remove total_bandwidth (#317)
• cli/ui: Upgrade iced (#320)
• transport: Add more metrics (#326)
• cli/http: Allow specifying port for HTTP outproxy (#332)
• cli: Enable SSU2 by default (#336)
• docs: Update documentation (#337)

Fixed

• ssu2: Terminate inbound connection if outbound connection is pending (#249)
• transport: Reject dial requests if the router is already connected (#250)
• ssu2: Inform transport manager when a connection has been terminated (#255)
• streaming: Resend reply SYN if it doesn't get acknowledged (#259)
• i2cp: Treat options field of GetDate as optional (#261)
• core: Fix fuzz tests (#269)
• tunnel: Fix flaky exploratory_tunnel_test (#276)
• transit: Improve transit tunnel cleanup logic (#279)
• cli: Fix configuration tests (#298)
• docs: Add Runtime trait parameter to examples (#303)
• cli: Decrease mock update interval to 250 milliseconds (#305)
• cli/ui: Improve subscription address validation (#311)
• util: Use correct protocol for SSU2 NAT-PMP port mapping (#312)
• core: Fix bugs (#328)
• tunnel: Return random inbound/outbound tunnel (#330)
• cli: Do not add duplicate entries to addres book (#333)

Thanks to @bheesham, @hizani and @Shrike05 for their contributions!