ChangeLog

# for this file format description,
# see https://github.com/olivierlacan/keep-a-changelog

## [2.40.0] - 2021-11-29
### Added
- Keep alive parameter for client tunnels
- Support openssl 3.0.0
- Localization to Armenian
- Show git commit info in version 
- Windows menu item for opening datadir
- Reseed if too few floodfills 
- Don't publish old and replacing tunnel in LeaseSet
### Changed
- Set gzip compression to false by default
- Build tunnel through ECIES routers only
- Removed ElGamal support for tunnels
- Moved webconsole resource to separate file
- Pick tunnels with compatible transport with another tunnel of floodfill
- Use common cleanup timer for all SSU sessions
- Reduced memory usage
- Reseed servers list
### Fixed
- Tunnels reload
- Some typos in log messages
- Cleanup relay requests table
- Server tunnel is not published
- Build on GNU/Hurd. Disable pthread_setname_np

## [2.39.0] - 2021-08-23
### Added
- Short tunnel build messages
- Localization. To: Russian, Ukrainian, Turkmen, Uzbek and Afrikaans
- Custom CSS styles for webconsole
- Avoid slow tunnels with more than 250 ms per hop
- Process DELAY_REQUESTED streaming option
- "certsdir" options for certificates location
- Keep own RouterInfo in NetBb
- Pick ECIES routers only for tunnels on non-x64
- NTP sync through ipv6
- Allow ipv6 addresses for UDP server tunnels
### Changed
- Rekey of all routers to ECIES
- Better distribution for random tunnel's peer selection
- Yggdrasil reseed for v0.4, added two more
- Encryption type 0,4 by default for server tunnels
- Handle i2cp.dontPublishLeaseSet param for all destinations 
- reg.i2p for subscriptions
- LeaseSet type 3 by default
- Don't allocate payload buffer for every single ECIESx25519 message
- Prefer public ipv6 instead rfc4941 
- Optimal padding for one-time ECIESx25519 message
- Don't send datetime block for one-time ECIESx25519 message with one-time key
- Router with expired introducer is still valid
- Don't disable floodfill if still reachable by ipv6
- Set minimal version for floodfill to 0.9.38
- Eliminate extra lookups for sequential fragments on tunnel endpoint
- Consistent path for explicit peers
- Always create new tunnel from exploratory pool
- Don't try to connect to a router not reachable from us
- Mark additional ipv6 addresses/nets as reserved (#1679)
### Fixed
- Zero-hop tunnels
- Crash upon SAM session termination
- Build with boost < 1.55.0
- Address type for NTCP2 acceptors
- Check of ipv4/ipv6 address
- Request router to send to if not in NetDb
- Count outbound traffic for zero-hop tunnels
- URLdecode domain for registration string generator in webconsole

## [2.38.0] - 2021-05-17
### Added
- Publish ipv6 introducers
- Bind ipv6 or yggdrasil NTCP2 acceptor to specified address 
- Support .b32.i2p addresses and hostnames for SAM STREAM CREATE
- ipv6 peer tests
- Publish iexp param for introducers
- Show ipv6 network status on the webconsole
- EdDSA signing keys can also be blinded
- Show router version on the webconsole
### Changed
- Rekey of all routers but floodfills to ECIES
- Increased number of precalculated x25519 keys to 15
- Don't publish LeaseSet without inbound tunnels
- Reseed from compatible address(ipv4 or ipv6)
- Recongnize v4 and v6 SSU addresses without host
- Inbound tunnel gateway must be ipv4 compatible
- Don't select next introducers from existing sessions
- Set X bandwidth for floodfill by default
### Fixed
- Incoming ECIES-x25519 session doesn't send updated LeaseSet
- Unique local address for server tunnels
- Race condition for LeaseSet creation in I2CP
- Relay tag for ipv6 introducer
- Already expired introducers
- Find connected router for first peer in tunnel
- Failed outgoing ECIES-x25519 session's tagset stays forever
- Yggdrasil address disappears if router becomes unreachable through ipv6
- Ignore SSU address/introducers if port is not specified
- Check identity and signature length for SSU SessionConfirmed

## [2.37.0] - 2021-03-15
### Added
- Address registration line for reg.i2p and stats.i2p through the web console
- "4" and "6" caps for addresses without published IP address
- Mesh and Proxy network statuses
- Symmetric NAT network status error
- Bind server tunnel connection to specified address
- lookuplocal BOB extended command
- address4 and address6 parameters to bind outgoing connections to 
- Rekey of low-bandwidth routers to ECIES
- Popup notification windows when unable to parse config for Windows
### Changed
- Floodfills with "U" cap are not ignored anymore
- Check transports reachability between tunnel peers and between router and floodfill 
- NTCP2 and reseed HTTP proxy support authorization now
- Show actual IP addresses for proxy connections
- Publish and handle SSU addreses without host
- Outbound tunnel endpoint must be ipv4 compatible
- Logging optimization
- Removed Windows service
### Fixed
- Incoming SSU session terminates after 5 seconds
- Outgoing NTCP2 ipv4 session even if ipv4 is disabled
- No incoming Yggdrasil connection if connected through NTCP2 proxy
- Race condition between tunnel build and floodfill requests decryption for ECIES routers
- Numeric bandwidth limitation
- Yggdrasil for Android

## [2.36.0] - 2021-02-15
### Added
- Encrypted lookup and publications to ECIES-x25519 floodfiils
- Yggdrasil transports and reseeds
- Dump addressbook in hosts.txt format
- Request RouterInfo through exploratory tunnels if direct connection to fllodfill is not possible
- Threads naming
- Check if public x25519 key is valid 
- ECIES-X25519-AEAD-Ratchet for shared local destination
- LeaseSet creation timeout for I2CP session
- Resend RouterInfo after some interval for longer NTCP2 sessions
- Select reachable router of inbound tunnel gateway
- Reseed if no compatible routers in netdb 
- Refresh on swipe in Android webconsole
### Changed
- reg.i2p for default addressbook instead inr.i2p
- ECIES-x25519 (crypto type 4) for new routers
- Try to connect to all compatible addresses from peer's RouterInfo
- Replace LeaseSet completely if store type changes 
- Try ECIES-X25519-AEAD-Ratchet tag before ElGamal
- Don't detach ECIES-X25519-AEAD-Ratchet session from destination immediately
- Viewport and styles on error in HTTP proxy
- Don't create notification when Windows taskbar restarted 
- Cumulative SSU ACK bitfields
- limit tunnel length to 8 hops
- Limit tunnels quantity to 16
### Fixed
- Handling chunked HTTP response in addressbook
- Missing ECIES-X25519-AEAD-Ratchet tags for multiple streams with the same destination
- Correct NAME for NAMING REPLY in SAM
- SSU crash on termination
- Offline signature length for stream close packet
- Don't send updated LeaseSet through a terminated session
- Decryption of follow-on ECIES-X25519-AEAD-Ratchet NSR messages
- Non-confirmed LeaseSet is resent too late for ECIES-X25519-AEAD-Ratchet session

## [2.35.0] - 2020-11-30
### Added
- ECIES-x25519 routers
- Random intro keys for SSU
- Graceful shutdown timer for windows
- Send queue for I2CP messages
- Update DSA router keys to EdDSA
- TCP_QUICKACK for NTCP2 sockets on Linux
### Changed
- Exclude floodfills with DSA signatures and < 0.9.28
- Random intervals between tunnel tests and manage for tunnel pools
- Don't replace an addressbook record by one with DSA signature
- Publish RouterInfo after update
- Create paired inbound tunnels if no inbound tunnels yet
- Reseed servers list
### Fixed
- Transient signature length, if different from identity
- Terminate I2CP session if destroyed
- RouterInfo publishing confirmation
- Check if ECIES-X25519-AEAD-Ratchet session expired before generating more tags 
- Correct block size for delivery type local for ECIES-X25519-AEAD-Ratchet

## [2.34.0] - 2020-10-27
### Added
- Ping responses for streaming
- STREAM FORWARD for SAM
- Tunnels through ECIES-x25519 routers
- Single thread for I2CP
- Shared transient destination between proxies
- Database lookups from ECIES destinations with ratchets response
- Handle WebDAV HTTP methods 
- Don't try to connect or build tunnels if offline
- Validate IP when trying connect to remote peer
- Handle ICMP responses and WinAPI errors for SSU
### Changed
- Removed NTCP
- Dropped gcc 4.7 support
- Encyption type 0,4 by default for client tunnels
- Stripped out some HTTP header for HTTP server response
- HTTP 1.1 addressbook requests
- Set LeaseSet type to 3 for ratchets if not specified
- Handle SSU v4 and v6 messages in one thread
- Eliminate DH keys thread
### Fixed
- Random crashes on I2CP session disconnect
- Stream through racthets hangs if first SYN was not acked
- Check "Last-Modified" instead "If-Modified-Since" for addressbook reponse
- Trim behind ECIESx25519 tags 
- Few bugs with Android main activity
- QT visual and layout issues

## [2.33.0] - 2020-08-24
### Added
- Shared transient addresses
- crypto.ratchet.inboundTags paramater
- Multiple encryption keys through I2CP
- Pre-calculated x25519 ephemeral keys
- Change datagram routing path if nothing comes back in 10 seconds
- Shared routing path for datagram session 
### Changed
- UDP tunnels send mix of repliable and raw datagrams in bulk
- Encrypt SSU packet again upon resend
- Start new tunnel message if remaining buffer is too small 
- Use LeaseSet2 for ECIES-X25519-AEAD-Ratchet automatically
- Save new ECIES-X25519-AEAD-Ratchet session with NSR tagset
- Generate random padding lengths for ECIES-X25519-AEAD-Ratchet in bulk
- Webconsole layout
- Reseed servers list
### Fixed
- Don't connect through terminated SAM destination
- Differentiate UDP server sessions by port 
- ECIES-X25519-AEAD-Ratchet through I2CP
- Don't save invalid address to AddressBook
- ECDSA signatures names in SAM
- AppArmor profile 

## [2.32.1] - 2020-06-02
### Added
- Read explicit peers in tunnels config
### Fixed
- Generation of tags for detached sessions
- Non-updating LeaseSet1
- Start when deprecated websocket options present in i2pd.conf

## [2.32.0] - 2020-05-25
### Added
- Multiple encryption types for local destinations
- Next key and tagset for ECIES-X25519-AEAD-Ratchet
- NTCP2 through SOCKS proxy
- Throw error message if any port to bind is occupied
- gzip parameter for UDP tunnels
- Show ECIES-X25519-AEAD-Ratchet sessions and tags on the web console
- Simplified implementation of gzip for no compression mode
- Allow ECIES-X25519-AEAD-Ratchet session restart after 2 minutes
- Added logrotate config for rpm package
### Changed
- Select peers for client tunnels among routers >= 0.9.36
- Check ECIES flag for encrypted lookup reply
- Streaming MTU size 1812 for ECIES-X25519-AEAD-Ratchet
- Don't calculate checksum for Data message send through ECIES-X25519-AEAD-Ratchet
- Catch network connectivity status for Windows
- Stop as soon as no more transit tunnels during graceful shutdown for Android
- RouterInfo gzip compression level depends on size
- Send response to received datagram from ECIES-X25519-AEAD-Ratchet session
- Update webconsole functional
- Increased max transit tunnels limit
- Reseeds list
- Dropped windows support in cmake
### Fixed
- Correct timestamp check for LeaseSet2
- Encrypted leaseset without authentication
- Change SOCKS proxy connection response for clients without socks5h support (#1336)

## [2.31.0] - 2020-04-10
### Added
- NTCP2 through HTTP proxy
- Publish LeaseSet2 for I2CP destinations
- Show status page on main activity for android
- Handle ECIESFlag in DatabaseLookup at floodfill
- C++17 features for eligible compilers
### Changed
- Droped Websockets and Lua support
- Send DeliveryStatusMsg for LeaseSet for ECIES-X25519-AEAD-Ratchet
- Keep sending new session reply until established for ECIES-X25519-AEAD-Ratchet
- Updated SSU log messages
- Reopen SSU socket on exception
- Security hardening headers in web console
- Various web console changes
- Various QT changes
### Fixed
- NTCP2 socket descriptors leak
- Race condition with router's identity in transport sessions
- Not terminated streams remain forever

## [2.30.0] - 2020-02-25
### Added
- Single threaded SAM
- Experimental support of ECIES-X25519-AEAD-Ratchet crypto type
### Changed
- Minimal MTU size is 1280 for ipv6
- Use unordered_map instead map for destination's sessions and tags list
- Use std::shuffle instead std::random_shuffle
- SAM is single threaded by default
- Reseeds list
### Fixed
- Correct termination of streaming destination
- Extra ',' in RouterInfo response in I2PControl
- SAM crash on session termination
- Storage for Android 10

## [2.29.0] - 2019-10-21
### Added
- Client auth flag for b33 address
### Changed
- Remove incoming  NTCP2 session from pending list when established
- Handle errors for NTCP2 SessionConfrimed send
### Fixed
- Failure to start on Windows XP
- SAM crash if invalid lookup address
- Possible crash when UPnP enabled on shutdown

## [2.28.0] - 2019-08-27
### Added
- RAW datagrams in SAM
- Publishing encrypted LeaseSet2 with DH or PSH authentication
- Ability to disable battery optimization for Android
- Transport Network ID Check
### Changed
- Set and handle published encrypted flag for LeaseSet2
### Fixed
- ReceiveID changes in the same stream
- "\r\n" command terminator in SAM
- Addressbook lines with signatures

## [2.27.0] - 2019-07-03
### Added
- Support of PSK and DH authentication for encrypted LeaseSet2
### Changed
- Uptime is based on monotonic timer
### Fixed
- BOB status command response
- Correct NTCP2 port if NTCP is disabled
- Flood encrypted LeaseSet2 with store hash

## [2.26.0] - 2019-06-07
### Added
- HTTP method "PROPFIND"
- Detection of external ipv6 address through the SSU
- NTCP2 publishing depends on network status
### Changed
- ntcp is disabled by default, ntcp2 is published by default
- Response to BOB's "list" command
- ipv6 address is not longer NTCP's local endpoint's address
- Reseeds list
- HTTP_REFERER stripping in httpproxy (#823)
### Fixed
- Check and handle incorrect BOB input
- Ignore introducers for NTCP or NTCP2 addresses
- RouterInfo check from NTCP2

## [2.25.0] - 2019-05-09
### Added
- Create, publish and handle encrypted LeaseSet2
- Support of b33 addresses
- RedDSA key blinding
- .b32.i2p addresses in jump links
- ntcp2.addressv6 parameter
### Changed
- Allow HTTP headers without value
- Set data directory from external storage path for Android
- addresshelper support is configurable per tunnel
- gradlew script for android build
### Fixed
- Deletion of expired encrypted LeaseSet2 on floodfills
- ipv6 fallback address
- SSU incoming packets routing

## [2.24.0] - 2019-03-21
### Added
- Support of transient keys for LeaseSet2
- Support of encrypted LeaseSet2
- Recognize signature type 11 (RedDSA)
- Support websocket connections over HTTP proxy
- Ability to disable full addressbook persist
### Changed
- Don't load peer profiles if non-persistant
- REUSE_ADDR for ipv6 acceptors
- Reset eTags if addressbook can't be loaded
### Fixed
- Build with boost 1.70
- Filter out unspecified addresses from RouterInfo
- Check floodfill status change
- Correct SAM response for invalid key
- SAM crash on termination for Windows
- Race condition for publishing

## [2.23.0] - 2019-01-21
### Added
- Standard LeaseSet2 support
- Ability to adjust timestamps through the NTP
- Ability to disable peer profile persist
- Request permission for android >= 6
- Initial addressbook to android assets
- Cancel graceful shutdown for android
- Russian translation for android
### Changed
- Chacha20 and Poly1305 implementation
- Eliminate extra copy of NTCP2 send buffers
- Extract content of tunnel.d from assets on android
- Removed name resolvers from transports
- Update reseed certificates
### Fixed
- LeaseSet published content verification
- Exclude invalid LeaseSets from the list on a floodfill
- Build for OpenWrt with openssl 1.1.1

## [2.22.0] - 2018-11-09
### Added
- Multiple tunnel config files from tunnels.d folder
### Changed
- Fetch own RouterInfo upon SessionRequest for NTCP2
- Faster XOR between AES blocks for non AVX capable CPUs
### Fixed
- Fixed NTCP2 termination send

## [2.21.1] - 2018-10-22
### Changed
- cost=13 for unpublished NTCP2 address
### Fixed
- Handle I2NP messages longer than 32K

## [2.21.0] - 2018-10-04
### Added
- EdDSA, x25519 and SipHash from openssl 1.1.1
- NTCP2 ipv6 incoming connections
- Show total number of destination's outgoing tags in the web console
### Changed
- Android build with openssl 1.1.1/boost 1.64
- Bandwidth classes 'P' and 'X' don't add 'O' anymore
### Fixed
- Update own RouterInfo if no SSU
- Recognize 'P' and 'X' routers as high bandwidth without 'O'
- NTCP address doesn't disappear if NTCP2 enabled
- Android with api 26+

## [2.20.0] - 2018-08-23
### Added
- Full implementation of NTCP2
- Assets for android
### Changed
- armeabi-v7a and x86 in one apk for android
- NTCP2 is enabled by default
- Show lease's expiration time in readable format in the web console
### Fixed
- Correct names for transports in the web console

## [2.19.0] - 2018-06-26
### Added
- ECIES support for RouterInfo
- HTTP outproxy authorization
- AVX/AESNI runtime detection
- Initial implementation of NTCP2
- I2CP session reconfigure
- I2CP method ClientServicesInfo
- Datagrams to websocks
### Changed
- RouterInfo uses EdDSA signature by default
- Remove stream bans
- Android build system changed to gradle
- Multiple changes in QT GUI
- Dockerfile
### Fixed
- zero tunnelID issue
- tunnels reload
- headers in webconsole
- XSS in webconsole from SAM session name
- build for gcc 8
- cmake build scripts
- systemd service files
- some netbsd issues

## [2.18.0] - 2018-01-30
### Added
- Show tunnel nicknames for I2CP destination in WebUI
- Re-create HTTP and SOCKS proxy by tunnel reload
- Graceful shutdown as soon as no more transit tunnels
### Changed
- Regenerate shared local destination by tunnel reload
- Use transient local destination by default if not specified
- Return correct code if pid file can't be created
- Timing and number of attempts for adressbook requests
- Certificates list
### Fixed
- Malformed addressbook subsctiption request
- Build with boost 1.66
- Few race conditions for SAM
- Check LeaseSet's signature before update

## [2.17.0] - 2017-12-04
### Added
- Reseed through HTTP and SOCKS proxy
- Show status of client services through web console
- Change log level through web connsole
- transient keys for tunnels
- i2p.streaming.initialAckDelay parameter
- CRYPTO_TYPE for SAM destination
- signature and crypto type for newkeys BOB command
### Changed
- Correct publication of ECIES destinations
- Disable RSA signatures completely
### Fixed
- CVE-2017-17066
- Possible buffer overflow for RSA-4096
- Shutdown from web console for Windows
- Web console page layout
## [2.16.0] - 2017-11-13
### Added
- https and "Connect" method for HTTP proxy
- outproxy for HTTP proxy
- initial support of ECIES crypto
- NTCP soft and hard descriptors limits
- Support full timestamps in logs
### Changed
- Faster implementation of GOST R 34.11 hash
- Reject routers with RSA signtures
- Reload config and shudown from Windows GUI
- Update tunnels address(destination) without restart
### Fixed
- BOB crashes if destination is not set
- Correct SAM tunnel name
- QT GUI issues

## [2.15.0] - 2017-08-17
### Added
- QT GUI
- Ability to add and remove I2P tunnels without restart
- Ability to disable SOCKS outproxy option
### Changed
- Strip-out Accept-* hedaers in HTTP proxy
- Don't run peer test if nat=false
- Separate output of NTCP and SSU sessions in Transports tab
### Fixed
- Handle lines with comments in hosts.txt file for address book
- Run router with empty netdb for testnet
- Skip expired introducers by iexp

## [2.14.0] - 2017-06-01
### Added
- Transit traffic bandwidth limitation
- NTCP connections through HTTP and SOCKS proxies
- Ability to disable address helper for HTTP proxy
### Changed
- Reseed servers list
- Minimal required version is 4.0 for Android
### Fixed
- Ignore comments in addressbook feed

## [2.13.0] - 2017-04-06
### Added
- Persist local destination's tags
- GOST signature types 9 and 10
- Exploratory tunnels configuration
### Changed
- Reseed servers list
- Inactive NTCP sockets get closed faster
- Some EdDSA speed up
### Fixed
- Multiple acceptors for SAM
- Follow on data after STREAM CREATE for SAM
- Memory leaks

## [2.12.0] - 2017-02-14
### Added
- Additional HTTP and SOCKS proxy tunnels
- Reseed from ZIP archive
- Some stats in a main window for Windows version
### Changed
- Reseed servers list
- MTU of 1488 for ipv6
- Android and Mac OS X versions use OpenSSL 1.1
- New logo for Android
### Fixed
- Multiple memory leaks
- Incomptibility of some EdDSA private keys with Java
- Clock skew for Windows XP
- Occasional crashes with I2PSnark

## [2.11.0] - 2016-12-18
### Added
- Websockets support
- Reseed through a floodfill
- Tunnel configuration for HTTP and SOCKS proxy
- Zero-hops tunnels for destinations
- Multiple acceptors for SAM
### Changed
- Reseed servers list
- DHT uses AVX if applicable
- New logo
- LeaseSet lookups
### Fixed
- HTTP Proxy connection reset for Windows
- Crash upon SAM session termination
- Can't connect to a destination for a longer time after restart
- Mass packet loss for UDP tunnels

## [2.10.2] - 2016-12-04
### Fixed
- Fixes UPnP discovery bug, producing excessive CPU usage
- Fixes sudden SSU thread stop for Windows.

## [2.10.1] - 2016-11-07
### Fixed
- Fixed some performance issues for Windows and Android

## [2.10.0] - 2016-10-17
### Added
- Datagram i2p tunnels
- Unique local addresses for server tunnels
- Configurable list of reseed servers  and initial addressbook
- Configurable netid
- Initial iOS support

### Changed
- Reduced file descriptors usage
- Strict reseed checks enabled by default

## Fixed
- Multiple fixes in I2CP and BOB implementations

## [2.9.0] - 2016-08-12
### Changed
- Proxy refactoring & speedup
- Transmission-I2P support
- Graceful shutdown for Windows
- Android without QT
- Reduced number of timers in SSU
- ipv6 peer test support
- Reseed from SU3 file

## [2.8.0] - 2016-06-20
### Added
- Basic Android support
- I2CP implementation
- 'doxygen' target

### Changed
- I2PControl refactoring & fixes (proper jsonrpc responses on errors)
- boost::regex no more needed

### Fixed
- initscripts: added openrc one, in sysv-ish make I2PD_PORT optional
- properly close NTCP sessions (memleak)

## [2.7.0] - 2016-05-18
### Added
- Precomputed El-Gamal/DH tables
- Configurable limit of transit tunnels

### Changed
- Speed-up of asymmetric crypto for non-x64 platforms
- Refactoring of web-console

## [2.6.0] - 2016-03-31
### Added
- Graceful shutdown on SIGINT
- Numeric bandwidth limits (was: by router class)
- Jumpservices in web-console
- Logging to syslog
- Tray icon for windows application

### Changed
- Logs refactoring
- Improved statistics in web-console

### Deprecated:
- Renamed main/tunnels config files (will use old, if found, but emits warning)

## [2.5.1] - 2016-03-10
### Fixed
- Doesn't create ~/.i2pd dir if missing

## [2.5.0] - 2016-03-04
### Added
- IRC server tunnels
- SOCKS outproxy support
- Support for gzipped addressbook updates
- Support for router families

### Changed
- Shared RTT/RTO between streams
- Filesystem work refactoring

## [2.4.0] - 2016-02-03
### Added
- X-I2P-* headers for server http-tunnels
- I2CP options for I2P tunnels
- Show I2P tunnels in webconsole

### Changed
- Refactoring of cmdline/config parsing

## [2.3.0] - 2016-01-12
### Added
- Support for new router bandwidth class codes (P and X)
- I2PControl supports external webui
- Added --pidfile and --notransit parameters
- Ability to specify signature type for i2p tunnel

### Changed
- Fixed multiple floodfill-related bugs
- New webconsole layout

## [2.2.0] - 2015-12-22
### Added
- Ability to connect to router without ip via introducer

### Changed
- Persist temporary encryption keys for local destinations
- Performance improvements for EdDSA
- New addressbook structure

## [2.1.0] - 2015-11-12
### Added
- Implementation of EdDSA

### Changed
- EdDSA is default signature type for new RouterInfos