CHANGELOG

Version explained:
 major : codebase increase on incompatible changes
 minor : increase on risk of code breakage during a major release
 bug   : increase on bug or incremental changes

Version 3.4.5
 * Fix: improper distribution of events to process workers
    reported by: Tim Epkes

Version 3.4.4
 * Fix: bug with IPv4 / ipv6 handling
 * Fix: better peer isolation when parsing messages
 * Fix: IPv6 decoding when the routes includes link-local
 * Fix: missing text API paramter
 * Fix: no JSON for Aggregator
 * Fix: show route extensive
    patch by: Michal Grzedzicki, thank you
 * Fix: 4-Octet AS Specific BGP Extended Community (RFC 5668)
    patch by: Michal Grzedzicki
 * Fix: bug with label encoding
    patch by: Jesse Mather
 * Improvement: add support for add-path with family MPLS
    requested by: Tim Epkes
 * Fix: bug when process writes multiple lines
    reported by: Ilya Voronin
 * Feature: accept packet with confedation (RFC 3065)
    requested by: oriordan (with a patch, thank you)
 * Fix: do not bark if an unknown ASPath attribute is found
 * Fix: correctly accept connection on AF_INET6 socket
    patch by: John W. O'Brien
 * Fix: restore lost python2.6 compatibility
    reported by: Minsuk Song
 * Fix: IPv6 MD5
    reported by: Dave J Knight
 * Add framework to debug SIGUSR1 related problems
 * Fix: do not drop session when receiving an unknown capability
    patch by: Peter van Dijk (PowerDNS)

Version 3.4.3
 * Fix: JSON message increment
    reported by: Daniel Neiter, with a patch, thank you.
 * Fix: JSON message format for operational
    reported by: Rob Barnes, with a patch, thank you.
 * Fix: JSON message for route-refresh
 * Fix: EOR unpack issue
 * Fix: ASPath encoding
 * Fix: possible bad notify call
 * Fix: Aggregator configuration issue
 * Fix: pycharm reported issues
   * operational, using afi instead of safi
   * bad function paramters
   * missing return keyword
   * many cleanups
 * Change: use RFC MULTISESSION capability and not CISCO variant anymore

Version 3.4.2
 * Feature: add more information in crash report
 * Fix: problem when trying to report exception errors
 * Fix: better handling of on PIPE errors
    reported by: Thomas Raabo
 * Fix: could not split MPLS routes
    reported by: Hideaki HAYASHI
 * Fix: not correctly handling NOTIFICATION message
    reported by: Hideaki HAYASHI
 * Fix: do not block on a peer should a socket become blocking
    reported by: Wouter Miltenburg
 * Fix: API JSON message id incrementation
    reported by: Wouter Miltenburg

Version 3.4.1
 * Fix: on bad JSON message
    patch from: Wouter Miltenburg
 * Fix: parsing of default route
    reported by: Wouter Miltenburg
 * Fix: remove legacy exabgp.tcp.timeout
 * Fix: forgot some processes options when printing neighbor
 * Fix: bad function call for API
 * Fix: correct JSON for OPEN
 * Fix: issues with bad naming of APIOption
    patch from: Wouter Miltenburg
 * Fix: do not try to be clever (and possibly get it wrong) and rely on keepalive timer to detect TCP faults
 * Fix: formating issue of extended community
 * Fix: issue with EOR
 * Fix: caching issue
    reported by: Wouter Miltenburg
 * Fix: make sure we do not call select with a negative time
    reported by: Wouter Miltenburg, Daniel Piekacz
    patch from: Wouter Miltenburg
 * Fix: handle AS4_PATH with PARTIAL bit set
    reported by: Daniel Piekacz
 * Fix: bug with generic attribute generation
 * Fix: bad Notification
    patch from: Wouter Miltenburg
 * Fix: bad Keepalive JSON message
    patch from: Wouter Miltenburg

Version 3.4.0
 * Feature: add support for extended-attribute for FlowSpec
 * Feature: more detailed JSON objects
    patch from: Wouter Miltenburg
 * Feature: support for L2VPN (experimental)
    patch from: Nikita V. Shirokov
 * Improvement: better handling of NOTIFICATION received during OPEN negotiation
 * Improvement: ExaBGP can restart failed helper process
 * Fix: Do not reconnect too fast when connection fails
    reported by: Robert Barnes
 * Fix: Invalid JSON object for route-refresh
    reported by: Robert Barnes
 * Fix: We were not reporting the NLRI of the route received when exabgp.log.routes was set
 * Fix: accept exabgp_tcp_port as configuration option and not only exabgp.tcp.port
 * Fix: duplicate line output
 * Fix: bad refactorisation which caused an bad ASN4 bug
 * Fix: change EOR from IPv4 multicast (mistake) to IPv4 unicast
    reported by: Mark Treacy
 * Fix: bad encoding of flow fragment encoding
    reported by: Andrei-Marius Radu
 * Fix: bad reporting of process open sending
    reported by: Mark Treacy (with patch, thank you)
 * Fix: Incorporating NETBSD compatibility patches
 * Fix: Generation of Generic Attributes
 * Fix: Faster reactor (should be able to process much more API/BGP messages)
 * Change: new commands for the configuration of the API
 * Change: JSON objects now include a unique neighbor identifier
 * Change: JSON objects now include a counter for unique message id
 * Change: JSON objects now include a "type" to now how to best parse them
 * Change: JSON new EOR object
 * Change: JSON new Flow format
 * Change: slight variation with the command line option names, now using docopt
    patch from: Michael Robert Watson
 * Change: the profile information is now exported in kcachegrind format
 * Compatibility: JSON re-introduced the family under the "announce" section ( removed by mistake )
 * Compatibility: restoring integer as default time, high resolution must be enabled to not break older installations
 * Change: JSON and Text shutdown object now shows the PID and PPID

Version 3.3.2
 * Fix: work toward working operational-01
   patch by: David Freedman
 * Fix: do not use . notation in systemd but _
   reported by: Apollon Oikonomopoulos

Version 3.3.1
 * Fix: typo using uid instead gid (could prevent dropping privileges !)
   reported by: Adrian Gämperli (with a merge request, thank you)
 * Fix: prevent ExaBGP to start if the log folder is not writeable by the user
 * Fix: configuration defaults for booleans ( and warns when group-updates is not enabled );
 * Fix: issue when removing some routes
    reported by: Adrian Gämperli (backb1 on github)
 * Fix: bad printing of route as-path
 * Fix: neighbor matching was too permissive
    reported by: Adrian Gämperli (with a merge request, thank you)
 * Fix: under load ExaBGP could miss some commands sent through the API
    reported by: Adrian Gämperli (with a merge request, thank you)
 * Change: performing KeepAlive handling as first action
 * Change: time is provided as an high resolution real number and not an integer
 * Debian package update by:
    Henry-Nicolas Tourneur

Version 3.3.0
 * Fix: typo causing issue when parsing multiple neighbor commands
    reported by: Pablo Camarillo Garvia
 * Fix: bad handling of EOR
    reported by: Petr Lapukhov
 * Fix: multiple bugs with multi neighbor commands
 * Feature: allow as-path [ asn asn, [ asn ] ]
 * Other: migrate the setup.py script to work with git (vs hg)
 * Change: TEXT API format changed and version updated to 3.3.0 (reflect the version when the last change was introduced)
 * Change: JSON API format changed and version updated to 3.3.0
 * Change: as-path now returns two JSON keys, 'as-path' and 'as-set'
 * Change: NLRI are now grouped by next-hop, next-hop removed from the NLRI
 * Change: raw message use the keyword "message" and not "update"
 * Change/Fix: JSON for announcement was missing next-hop
 * Change: on TEXT API, "announced route eor" becomes "announced eor"

Version 3.2.19
 * Fix: bug when displaying EOR
 * Fix: invalid check on next-hop for multi-line routes
    reported by: Pierre Aubry
 * Fix: badly parsing command line for run option
    reported by: Allan Feid
    solution by: Vincent Bernat
 * Fix: allow the creation of 'allow' flows
    reported by: Adrian Cepleanu
 * Fix: bad JSON encoding for EOR
    reported by: Robert Barnes
 * Fix: API message encoding
    patch by: Daniel Neiter
 * Feature: allow digit:digit in extended communities
    requested by: Pierre Aubry
 * Feature: healtcheck.py, python 2.6 and community support
    pulled from: Allan Feid

Version 3.2.18
 * Fix: add path for IPv6 was badly negotiated
    reported by: Robert Barnes

Version 3.2.17
 * Feature: make route auto-flush an option with an API call to flush routes on demand
 * Feature: make the reactor loop time an option (it allows for a faster flush of routes)
 * Feature: allow to disable the Adj-RIB-Out (can save lots of memory if you know what you are going to send)
    requested by: David Hauweele
 * Fix: Keep API routes between SIGUSR
 * Fix: Missing empty added nlri when the update only has withdrawn
    reported by Robert Barnes (and his co-workers) with a patch, thank you !
 * Fix: Single AS Path with AS Set were reported as empty AS Path and AS Set
    reported by: David Hauweele
 * Fix: possibly not sending withdrawal when it was required
    reported by: David Hauweele
 * Fix: typo in code causing crash when process went away
    reported by: Robert Barnes
 * Fix: RouterID MUST be an IPv4
    reported by: Kristopher Beevers
 * Fix: JSON output on EBGP and IBGP session is not the same
    reported by: Robert Barnes
 * Fix: route representation with labels and route distinguisher
 * Fix: do not double remove the BGP header size
    reported by: Hideaki HAYASHI
 * Fix: parsing flow NLRI, withdrawal were reported as announcement
 * Fix: printing extended communities
 * Fix: retry when network is blocking (issue 60)
    reported by: Hideaki HAYASHI
 * Change: remove next-hop from attributes in JSON as it is given in the announce section
 * Change: cleanup in configuration parsing
 * Change: the path-information, labels and route distinguisher are now printed before the next-hop

Version 3.2.16
 * Fix: fix an issue with RIB cache handling
 * Fix: fix an issue with Flow generation introduced recently (mandatory attributes are mandatory even for Flow Routes)
    thanks to: Quentin Loos for reporting the issue and helping fixing it
 * Fix: on SIGUSR no route withdrawal update was performed
    reported by: Sascha Schumann
 * Fix: Do not oversend routes for route refresh
    reported by: Hideaki HAYASHI
 * Fix: Bug when route when trying to withdraw an absent route with the API
    reported by: Peter Bristow
 * Fix: Malformed JSON message
    reported by: Robert Barnes
 * Fix: validate the FLAG of the attribute received (following our own advise on IDR)
 * Change: major RIB code modification
 * Change: match attributes using the flag value as well

Version 3.2.15
 * Fix: a wrong fix introducing a bug in 3.2.14

Version 3.2.14
 * Fix: do not leak route between peers
 * Fix: restore group level static group for all peers thereafter
 * Fix: a bug in group-updates causing attributes to not be included in the update message
 * Fix: a bug when update large than 4096 could be generated with group-updates
 * Fix: an issue with JSON generation
 * Fix: MD5 support had been removed by error from 3.2
 * Feature: allow to use quote with --decode
 * Feature: implement draft-ietf-idr-aigp-10

Version 3.2.13
 * Fix: do not send enhanced route refresh BoRR and EoRR on reconnection
 * Fix: do not take all the CPU when connecting

Version 3.2.12
 * Fix: the signal for reload were wrong in the debian script
    reported by: Sascha Schumann
 * Fix: a critical bug introduce in 3.2.11 when route were not resent on reconnect
    reported by: Sascha Schumann

Version 3.2.11
 * Feature: the TCP server allows 'neighbor' commands
    patch by: Hideaki HAYASHI
 * Feature: initial Enhanced route refresh initial implementation
    thanks to: Hideaki HAYASHI for reporting an issue before the release (some border cases still exist)
 * Fix: bug in generating API string, missing space
 * Fix: bug in generating API string, withdrawn reported as invalid announced
 * Fix: bug in generating API string, withdawn was missing Path-Information
 * Fix: route refresh implementation issues
 * Fix: a bug with capability parsing introduced with operational
    reported by: M. Brent Busby
 * Fix: be more aggressive on reconnection (3.2 was slower than 3.1)
    reported by: Sascha Schumann

Version 3.2.10
 * Fix: was not announcing add-path for IPv6 unicast
 * Fix: we were not sending the Notification messages
    reported by: Hideaki HAYASHI
 * Feature: add support for route-refresh (RFC 2918)

Version 3.2.9
 * Fix: some json generation issue
    reported by: Peter Spikings
 * Fix: bad decoding of withdrawn routes with label ( checking 0x80000 and not 0x800000 )
 * Fix: only treat 0x800000 as special for route withdrawal
 * Fix: we could believe we were already connected when we were not
 * Fix: handle when ExaBGP daftly connects to iself
 * Fix: did not parse add-path capability correctly (only registered the last family sent)
    reported Ryan Steinmetz
 * Fix: ASM messages were sent as ADM
 * Feature: decode shows the JSON representation of updates
 * Feature: start of support for draft-ietf-idr-operational-message-00
 * Feature: allow operational advisory message using the API

Version 3.2.8
 * Fix: correctly re-send routes between restart

Version 3.2.7
 * Fix: do not try to read empty body, causing loop delay

Version 3.2.6
 * Fix: bug in collision detection
 * Fix: prevent re-announcement of identical routes

Version 3.2.5
 * Feature: FlowSpec decoding (ExaBGP can decode incoming FlowSpec)
 * Feature: detect invalid netmask on route parsing
 * Feature: "next-hop self" is supported via the API
 * Feature: can accept incoming connect and perform collision detection
 * Feature: add support for draft-ietf-idr-flowspec-redirect-ip-00.txt
 * Feature: add missing DCSP marking from RFC 5575 (flowspec)
 * Feature: add missing traffic-action from RFC 5575 (flowspec)
 * Feature: add support for draft-raszuk-idr-flow-spec-v6-03
 * Feature: complete RFC 5575 by providing support for flow-vpn
 * Fix: async connect issues
    reported by: Vincent Bernat (with very good advice for the patch)
 * Fix: bad function defintions
    patch by: Vincent Bernat
 * Fix/Compatibility: bad naming of flow capability
 * Compatibility: -c becomes -f (it should not be used by users anyway)

Version 3.2.4
 * Feature: new update code generation can really group NLRI in one update packet
 * Feature: massive code cleanup, much easier to read
 * Feature: new RIB code (inbound and outbound tables) much faster
 * Compatibility: JSON next-hop for the route is not in the attribute anymore but the NLRI

Version 3.2.3
 * Fix: an issue in the 3.2.x series when the socket return a non-fatal error
    reported by: Daniel Bradshaw
 * Fix: an issue when the code would not behave correctly on network error
 * Fix: some issues when encoding vpnv4 routes
 * Fix: change the behaviour of the main peer loop (should behave more like expected - no bug reported tho)
 * Fix: many small fixes
 * Fix: bad encoding of FlowSpec Fragments
 * Feature: implemented some defensive coding practice (enable with exabgp.debug.defensive)
 * Feature: IO code now fully non blocking on read and write
 * Feature: total rewrite of the watchdog feature now extremely scalable

Version 3.2.2
 * Feature: allow to generate NOTIFICATION messages through the API
    requested by: Parag Jain
 * Feature: new syntax for the multiple neighbor announcement created in 3.1.13
    Allow to filter on more than the IP address
    requested by: Petr Lapukhov
 * Feature: better uid/euid/gid change check
 * Feature: allow to reload with restart of helper process with SIGUSR1
    patch by: Vincent Bernat
 * Feature: --decode can now be passed multiple messages to decode
 * Feature: -v,--version returns ExaBGP's version
 * Feature: be more robust on ^C
 * Feature: totally rewrote the networking code, it now better deal with blocking write and not not need buffering
 * Feature: user controlled open wait timer
 * Feature: handle unknown transitive attributes
 * Feature: allow the generation of generic attributes
 * Feature: faster parsing of consecutive updates with the same attributes
 * Feature: more regression testing
 * Fix: potential issue with multisession collision detection
 * Fix: with multisession recent python would refuse to copy an route due to a lock in logger of the neighbor object
 * Fix: could not handle NOTICATION sent during the OPEN negotiation stage
 * Fix: extra spaces in the configuration could cause bad parsing
    reported by: Parag Jain (with a patch for the RD case - thank you)
    reported by: Vincent Bernat (with an alternate solution)
 * Fix: ExaBGP would not connect if the OS did not implement SO_REUSEPORT
    reported by: Vincent Bernat
 * Fix: the configuration would not handle run program with upper case or spaces
    reported by: Vincent Bernat
 * Fix: bug in the networking code
    patch by: Vincent Bernat
 * Fix: an issue with received timer expiring when it should not have
    reported by: Eric Cables
 * Fix: do not try to parse Flow Route when perforing self-check (ExaBGP regression suite)
 * Compatibility: supervisor was renamed reactor
 * Compatibility: the word inet4/inet6 are now replaced by ipv4/ipv6
 * Compatibility: the option exabgp.tcp.block was removed following the networking code change
 * Compatibility: reload the configuration with SIGUSR1, reload configuration and processes with SIGUSR2
 * Compatinility: using SIGHUP will now TERMINATE ExaBGP and not reload the configuration
    reported by: Daniel Bradshaw (issue 32)

Version 3.1.13 - 6th July 2013
 * Fix: only clear buffered routes on restart and not reload (bug never reported)
 * Fix: an issue when parsing EOR
 * Fix: bug with RD community genration
    reported by: Parag Jain
 * Feature: use less memory on route change calculation
 * Feature: more regression testing
 * Feature: allow to control which neighbor will get API notification
    requested by: Parag Jain
 * Feature: allow to control which neighbors will get API notification
    requested by: Petr Lapukhov
 * Feature: allow delayed connections
    requested by: David Freeman
 * Feature: block on busy socket for performance testing
    requested by: David Freeman
 * Fix/Feature: only announce routes for the negociated family on a connection
    requested by: Andrew Hoyos

Version 3.1.12 - 16th May 2013
 * Fix: could crash when a family safi was not defined in the peer family group instead of exiting with an error
 * Fix: a bug in the generation of extended community (target and origin)

Version 3.1.11 - 2nd of May 2013
 * Fix/Feature: prevent exabgp api command to block the main loop if very long (issue 29)
 * Feature: better sharing of available time between api and peers
 * Fix: a bug when trying to stop exabgp and a worker process is unstable
 * Feature: count how many time a worker crashed and stop the application it is unstable (5 restart in 64 seconds)

Version 3.1.10 - 2nd of May 2013
 * Change: the JSON format of ASPath

Version 3.1.10 - 8th of April 2013
 * Change: relax a rule and let MED propagate on IBGP

Version 3.1.9 - 27th of March 2013
 * Fix: bug in logging
 * Fix: typo in neighbor printing

Version 3.1.8 - 22nd of March 2013
 * Fix: bad encoding of extended community for FlowSpec redirect
    reported by: Ozgur Karaman
 * Feature: unsupported before the next configuration format 'next-hop self', the neighbor MUST be defined first
    requested by: Federic Gabut-Deloraine

Version 3.1.7 - 18th of March 2013
 * Fix: api only get bgp session negotiation messages if neighbor-changes is set
    reported by: Lorenzo Murillo
 * Fix: json quoted integer and long by mistake
    reported by: Lorenzo Murillo
 * Fix: json used comma with no data to separate
    reported by: Lorenzo Murillo

Version 3.1.6 - 8th of March 2013
 * Fix: unclear log entry when removing route using API
    reported by: Lorenzo Murillo
 * Fix: withdrawn routes were always prepended with add-path information
 * Fix: bad withdrawal of routes (issue 11)
 * Fix: more sanity checking when parsing flow routes
 * Change: split configuration code to not be exabgp only
 * Feature: add a very simple BMP deamon (version 1 of the draft)

Version 3.1.5 - 18th of Febuary 2013
 * Fix: function name broking some features (issue 23)
    reported by: Lorenzo Murillo

Version 3.1.4 - 18th of Febuary 2013
 * Fix: Learn to spell negotiated (issue 21)
    reported by: Ian Wells
 * Feature: option to only attempt one TCP connection per peer (required by unittesting code)
 * Fix: a bug in code in charge of parsing legacy API names
 * Fix: fix relative path from exabgp
 * Fix: bug in api code causing crash
 * Fix: did not cleanup routes from the api before tokenisation (issue 22)
    reported by: Lorenzo Murillo
 * Fix: did not split routes from the api (issue 22)
    reported by: Lorenzo Murillo
 * Fix: when the api program was sending message too fast, some were missed (issue 22)
    reported by: Lorenzo Murillo
 * Fix: make peer name more unique (adding asn, and router-id) to prevent to router configuration to merge
 * Feature: restart the API program if we lost its file descriptor

Version 3.1.3 - 4th of Febuary 2013
 * Fix: JSON bugs (encoding for cluster-list, withdrawn routes)
    patch by: Vincent Bernat

Version 3.1.2 - 10th of January 2013
 * Copyright: updated all copyright notice (welcome to 2013)
 * Change: tidy process command name (keeping compatibility)
 * Feature: pass raw update message to the API
 * Feature: better control of the API message passed
 * Feature: allow/make work a global process for multiples peers (partial compatibility kept)

Version 3.1.1 - 6th of January 2013
 * Complete Fix: watchdog feature (issue 13)
 * Feature: JSON API 1.0, flowspec untested (issue 17)
 * Feature: allow to remove routes by only providing the nlri and next hop (issue 16)

Version 3.1.0 - 2nd of January 2013
 * Partial Fix: watchdog feature
    reported by: Ryan Steinmetz
 * Fix: problem with SIGHUP when deleting peer
    patch by: Justin Azoff (thank you)
 * Fix: cluster-list attribute was not passed to api correctly
 * Feature: MD5 support on FreeBSD (issue 14)
    patch by: Ryan Steinmetz (thank you)
 * Feature: caching of Community and Next-Hop
    requested by: Justin Azoff (with benchmarking gains report,thank you)
 * Feature: Store routes in neighbor as set and not list, so removal are O(1)
    patch by: Justin Azoff (thank you)
 * Feature: (experimental) Limit the memory used for parsed route caching
 * Feature: (experimental) json encoding on the API (issue 17) not tested with flow routes or complex routes

Version 3.0.11 - 21st of November 2012
 * Fix: add support for IPv6 MD5SUM
    reported by: Eiichiro Watanabe (with a patch, thank you)
 * Fix: RFC compliance, supporting keepalive timer of zero
 * Fix: parsing an invalid community string could cause a program crash
 * Feature: add possibility to disable route attribute caching to reduce memory usage
               (over a few hundred Mb saved per full routing tables)
    requested by Daniel Piekacz

Version 3.0.10 - 6th of September 2012
 * Fix: not removing duplicate route correctly (same nlri different attributes) (issue 7)
    patch by: Reggie Yam (thank you)

Version 3.0.9 - 5th of September 2012
 * Fix: problem when parsing ASN which are not fitting in a Python integer
    reported by: Matthias Cramer

Version 3.0.8 - 28th of August 2012
 * Fix: empty as-path route printing
 * Fix: bug in printing neighbor objects
 * Fix: the first route of any MultiProtocol Update did not get its attributes set
 * Fix: safi on extensive route printing
 * Feature: change the packet dump format to be cisco like
 * Change: added configuration self-checking (-t, --test)
 * Feature: added parsing of raw update in command line (--decode)
 * Feature: add a capability to disable asn4 support (useful when decoding routes)

Version 3.0.7 - 19th of August 2012
 * Fix: parser had a bug with multiple flow routes
    reported by Dmitry Lisakov and Oleg Alekseenko

Version 3.0.6 - 5th of August 2012
 * Fix: ommission during a variable name change
 * Fix: the example supervise script
 * Fix: withdrawing routes via helper program (issue 5)

Version 3.0.5 - 22 of July 2012
 * Feature: suppor for systemd
    patch by: Sébastien Luttringer
 * Fix: some unexpected verbosity when use the exabgp shell script on some OSes
    patch by: Sébastien Luttringer
 * Fix: possible miss of connection loss
 * Fix: EOR code (again)
 * Fix: we were deleting the next-hop of MP routes !
 * Fix: follow correctly RFC 4760 (MP) for route generation (it was working, we were lucky)
 * Fix: exabgp.daemon was spelt exabgp.deamon for the PID location migration
    reported by: Tim Gebbett
 * CHANGE: Do not start if the PID file exists
 * CHANGE: helpers can now get new message for EORs like "announced eor 1/1 (IPv4 unicast)"
 * Debian package update by:
    Henry-Nicolas Tourneur
 * ArchLinux package by:
    by: Sébastien Luttringer

Version 3.0.4 - 19 of July 2012
 * Fix: FlowSpec API change update forgotten
 * Fix: Provide the right user to -fi when upgrading on Debian
 * Fix: split option now works with non ipv4 unicast route
 * Fix: log level parsing with -d
 * Fix: need to change gid before uid when dropping privileges
 * Fix: do not run our forked program as the caller but the suid user (fix bug when daemonizing too)
 * Fix: bug when daemonizing and not using syslog
 * Fix: handle gracefully ^C during configuration load/reload
 * Feature: prevent SIGINT to reach the forked programs
 * Feature: allow multiple configuration files, which forks multiple main loops
 * Feature: send a "shutdown" message before terminating the worker processes
 * Feature: group-updates option in neighbor which group routes with the same attributes in one update
 * Feature: announce to helpers the start and end of update

Version 3.0.3 - 17 of July 2012 (unreleased experimental version)
 * Fix: bug in ASN4 path reconstruction
 * Fix: on peer close, do not carry untransmitted routes through the next cycle
 * Fix: on peer reload make sure all the routes are re-announced
 * Fix: massive CPU saving - only check for new route to announce when we have some
 * Fix: route buffering when sending many routes over slow connection/to slow routers was broken
    reported by Simon Woodhead (thank you for the testbed to debug it)
 * Feature: in the way we store route in memory for the route delta on config change
 * Feature: better reporting of message buffering
 * CHANGE: The way the routes as-path is printed/parsed (final for the 3.x.x)

Version 3.0.2 - 16 of July 2012 (unreleased experimental version)
 * CHANGE: python2.4 may work but it not supported anymore
 * Fix: as-path decoding issue with as-set being eaten (full rewrite of ASPATH and ASN4 parsing)
    reported by Rishabh Goel
 * Fix: bug with profiling
 * Fix: withdrawal was broken when path-info was added
 * API CHANGE: as-path configurtion syntax (as-sequence removed)
 * CHANGE: restructuration of file hierarchy

Version 3.0.1 - 14 of July 2012 (unreleased experimental version)
 * Feature: caching of parsed attributes of route received (saving memory and CPU)
 * Feature: do not generate complex string with packet data if not printed
 * Feature: all objects are storing data in the wire format when possible
 * Feature: add AGGREGATOR and AS4_AGGREGATOR support
    requested by: Rishabh Goel <rgoel@internap.com>
 * Feature: add ATOMIC_AGGREGATE support
    requested by Rishabh Goel
 * Feature: faster configuration parsing
 * Feature: bring compatibility mode for option with 2.0.x
 * Feature: support for RFC 4659 BGP-MPLS IP VPN Extension for IPv6 VPN
 * Fix: harmless bug in the EOR generation
 * Fix: missing family announcement in open when autogenerated with option "all"
 * Fix: silly bug in profiling
 * Fix: clusterid and originator_id were not added to generated routes
 * Fix: were not parsing extended-community in multi-line routes
 * Fix: flow-spec route creation (broken during the work for 3.0.0)
 * Fix: typo when generating route string with labels
 * Fix: problem when forking on BSD/Darwin
 * Change: to ASN4 code

Version 3.0.0 - 13 of July 2012 (unreleased experimental version)
 * Major version change due to incompatible CLI interface with version 1.x.x and 2.x.x
 * Major version change due to a change of API behaviour with the forked worker processes

 * Change : Many printed message have changed, including OPEN MultiProtocol
 * CLI Change: use new ini file and environment values for configuration
 * API Change: send "up" message to worker process when neighbour OPEN negotiation is complete (not on TCP up)
 * API Change: the format of the line sent to the worker changed, neighbor name include multi-session information
 * API Change: the down message sent to help programs now include a reason for the shutdown of the session
 * API Change: use the word withdrawn when the route was received, withdraw when it is an action, same for announce and announced
 * API Addition: send "connected" to worker when neighbour TCP session is established (replace previous 'up')
 * API Addition: requires peer-updates under 'process' to announce peer status changes
 * API Addition: show routes, show routes extensive, show neighbors
 * Fix: were not dropping root privileges correctly
 * Fix: reset counters correctly for number of routes seen (only affects the logs)
 * Fix: prevent 100% CPU usage/loop when trying to read on unreliable links
 * Fix: correctly process IPv6 routes with 32 bytes long next-hop
    reported by Daniel Piekacz (with patch, thank you)
 * Fix: problem on broken pipe with the helper program
 * Fix: correct sending of message to helper program (every worker was getting every peers messages)
 * Fix: if an helper program goes away, do not try to restart the peer (prevent surprises)
 * Fix: problem when writing too fast and causing EGAIN errno failure on the socket (mostly/only on Mac OSX)
    reported by Simon Helson (with patch, thank you)
 * Fix: a nasty bug when dynamic route announcement would not work when no routes were setup
    reported by Tim Gebbett
 * Fix: bad counting of routes parsed (not resetting in some case)
 * Fix: badly printed local-preference when generating route representation
 * Fix: bug when trying to daemonise ExaBGP, caused by unclosed FD
    reported by Ryan Lane (with a patch, thank you)
 * Fix: parse correctly routes with empty AS-SET or AS-SEQUENCE
 * Feature: hidden option to change BGP select timeout (use at your own risk - do not ask me where it is - it is hidden)
 * Feature: announce EOR even if Graceful-Restart was not negotiated but only MultiProtocol
 * Feature: implementation of draft-ietf-idr-bgp-multisession-06
    use capability 131 (and not 68) for multisession to achieve interop with Cisco
 * Feature: following RFC 6608 new notification codes
 * Feature: to the logging code and message filtering
 * Feature: support RFC 3765 (NOPEER community)
 * Feature: support for draft-ietf-idr-add-paths-07 (even IPv6 even if it is not supported by anyone)
    requested by: Rishabh Goel (Thank you for giving me a BGP session to an XR)
 * Feature: support for RFC 4456 (BGP Route Reflection: An Alternative to Full Mesh Internal BGP (IBGP))
    more exactly the generation and parsing of originator-id and cluster-list attributes
    requested by Rishabh Goel
 * Feature: add tcp timeout control for connection over very slow ebgp multihop (dangerous, use with care)
 * Feature: control of the MP families announced in the OPEN message
 * Feature: support for RFC 3107 and 4364 (Carrying Label Information in BGP-4)
 * Feature: selfcheck, allow to check if the routes we generate pass our own parser

Version 2.0.8 - 31 of March 2012 (stable version)
 * Fix: the update grouping could cause message up to "header size" bigger than allowed.
 * Fix: caller script path detection

Version 2.0.7 - 24 of March 2012
 * Fix: debian packaging issue
 * Note: Only released for debian (again :p)

Version 2.0.6 - 28 of Febuary 2012 (stable version)
 * Feature: update grouping up to 4096 bytes
 * Fix: debian packaging issue

Version 2.0.5 - 10 of Febuary 2012
 * Feature: allow named community
 * Fix: bad flowspec component size calculation for large flow routes
 * Fix: bad attribute generation for attributes bigger than 256 chars
 * Fix: allows to pass arguments to the helper programs
 * Contribution: route collector utilities from Daniel Piekacz

Version 2.0.4 - 1st of Febuary 2012
 * Fix: sending any signal stoped the program instead of reloading

Version 2.0.3 - 1st of Febuary 2012
 * Feature: now sending help "neighbor <ip> up" when a neighbor goes up
 * Fix: now sending correctly "neighbor <ip> down" when a neighbor goes down
 * Fix: a bug when parsing "split" configuration
 * Fix: sending routes faster than a router can accept does not cause the BGP session to go down
    problem found by Eric Nghia Nguyen Duy (thank you for giving me access to his lab to fix the issue)
 * Feature: Buffering message we can not send if sockets return a transient failure
 * Feature: Limiting how long and how deep the buffer are kept before we kill the session
 * Fix: under load we could receive partial messages, read until we have it all
 * Fix: we were not always sending the 'down' message to handlers
 * Fix: handle signal during select
 * Internal Change: how we read from socket
 * User Change: new DEBUG_CORE option (alias for DEBUG_SUPERVISOR, DEBUG_DAEMON, DEBUG_PROCESS, DEBUG_MESSAGE, DEBUG_TIMER, DEBUG_ROUTE)
 * User Change: DEBUG_ROUTES is deprecated please use DEBUG_ROUTE (2.0.x release with have both values)
 * Feature: Parsing AS4_PATH message and merging AS_PATH when required
 * Fix: possible problem with session establishment
 * Feature: extendeded community are available in the configuration file
 * Feature: printed routes now include extended community information
 * Fix: bad route generation for OLD BGP speakers, previously not including 2 bytes ASN in the AS4_PATH

Version 2.0.2 - 1st of January 2012
 * Copyright: updated all copyright notice (welcome to 2012)
 * Fix : would not daemonise correctly
 * Fix: we were mistakenly not displaying Notify sent on errors
 * Fix: some debian packaging issues
 * Fix: bug when parsing unknown open capability
 * Fix: forgotten to allow some route option on multiline
 * User Change: implemented RFC 6286 BGP Identifier released restrictions
 * Improvment: recognise multisession capability (draft-ietf-idr-bgp-multisession-06)
 * Improvment: allow the configuration of route which will not be announced on configuration reload (to work in conjunction with watchdog)
    requested by Marco d'Itri

Version 2.0.1 - 8th of December 2011
 * Fix : Regression on FlowSpec
 * Fix : interpreter not found on some Linux version
    (issue 3) reported by  Sebastien Luttringer

Version 2.0.0 - 3rd of December 2011 (experimental version)
 * Feature: can set flowspec communities
    requested by Yiming Gong
 * Feature: incoming route parsing for processing by an external application
    requested by Daniel Piekacz (and others)
 * Improvment: Add profiling features to find bottlenecks
 * Improvment: Code speedup following profiling
 * Internal Change : lots of folder restructuration
 * Internal Change : all includes now under exabpg and not bgp
 * User Change : move the program from bin to sbin, and renamed it from bgpd to exabgp
 * User Change : configuration folder now called exabgp to match debian package
 * User Change : move all external processes in the exabgp configuration folder

Version 1.3.4 - 21th of September 2011 (stable version)
 * Feature: added support for asdot/asdot+
    requested by jonlooney (with a patch - thank you)
 * Fix: when the pid file could not be written, the daemon was crashing on exit

Version 1.3.3 - 25th of June 2011
 * Feature: massive speed improvement when reloading with many routes (60 to 2 seconds with 10k routes)
    reported by Martin Baum (with proof of concept patch)

Version 1.3.2 - 23rd of June 2011
 * Fix bug where we would not wait long enough for OPEN/KEEPALIVE messages on startup
    reported by: Yann Berthier

Version 1.3.1 - 3rd of May 2011
 * Fix bug in configuration parsing introduce just before 1.3.0
 * Feature: make tcp-server implement all the internal API available

Version 1.3.0 - 2nd of May 2011
 * Feature: reduce likelyness of route update recalculation causing us to not send keepalive in time
 * Fix: introduced a bug in neighbor printing
 * Fix: we were trying to send a KEEPALIVE after the initial routes, but it was not going
 * Fix: a work around a python bug with TCP was not implemented everywhere
 * Feature: adding a 'ttl-security' to allow to explicit setup of TCP TTL
 * Feature: better handling of BGP timer for keepalive
 * Feature: refuse to run as root, try to run as nobody automatically, uid/gid set to the user defined by env USER otherwise
 * Removed: the old wiki documentation
 * Feature: Debian Packaging (author and maintainer: Henry-Nicolas Tourneur - thank you)
 * Change: renamed env variable DAEMON to DAEMONIZE (to prevent name clash with Debian)
 * Feature: added env variable PDB if set the program will call pdb, the python debugger, on program fault
 * Feature: it is now possible to get some routes withdrawn from an external process (see watchdog example conf.)
    warning: this code is not yet considered production ready, expect some bugs for complex configurations
 * Feature: it is now possible to modify the configuration without reload from external proccess (see process example conf.)
    warning: this code is not yet considered production ready, expect some bugs for complex configurations
 * Fix: make sure we can setup a session even if no route (ie: AFI/SAFI families for Mulitprotocol) are in the configuration
 * Fix: many small bug fixes, simple code refactorisation, ...

Version 1.2.0 - 25th of January 2011
 * Feature: Allow to break route in more specific (ie define a /22 and get 4x /24 announced)
                This is useful when blackholing traffic to make sure no routes more specific are received from your network peer/transit
    requested by : Renaud Chaput
 * Feature: Save the program PID into a file (set the PID= environment value with the file path)
    requested by : Renaud Chaput
 * Feature: Add syslog support (env SYSLOG= nothing for local syslog, a file name (auto-rotate) or host:<host> for remote syslog)
    requested by : Josh Ward
 * Feature: Can now daemonise (env DAEMON= detach and send the program in the background)
    requested by : Josh Ward
 * Feature: Selection of what subsystems to log, more readable logs (well, less unreadeable to be exact)
 * Feature: Create a new "group" in the configuration to share routes and configuration options between neighbors
    requested by : Multiple people
 * Fix: non detection of MD5 change on configuration reload
 * Feature: support distutil with a setup.py file for easy installation

Version 1.1.0 - 10th of January 2011
 * Feature: Tested and completed TCP MD5 signature
    contribution: MD5 TCP code by David Farrar

Version 1.0.4 - 8th of January 2011
 * Feature: can now toggle debuging using environment values (DEBUG_CONFIGURATION, DEBUG_SUPERVISOR, DEBUG_WIRE)
 * Fix: some change to the AS_PATH generation code (some routers did not accept empty AS_PATH as it was encoded before)
    reported by: R.P. Aditya
 * Fix: some interoperability issue with openbgpd (could not parse their OPEN message)
    (issue 1) reported by Manuel Guesdon
 * Experimental: Some MD5 for Linux (untested - surely not working)

Version 1.0.3 - 6th of January 2011
 * Fix: missing default localpref on IBGP session if not specified on the route
 * Feature: more verbose messages in case of OPEN negociation issue
 * Fix: typo preventing 4 Bytes ASN to work

Version 1.0.2 - 22nd of October 2010
 * Feature: only try to generate UPDATE messages if the configuration was changed (save quite some CPU as the algorithm is really naive)
 * Fix : a neighbor configuration change could have been undetected on SIGHUP/SIGALRM
    reported by: Yann Berthier
 * Fix : reloading the configuration did not detect the removed routes
    reported by Renaud Chaput
 * Fix : a bug in the format of the UPDATE for route withdrawal causing Cisco (and not Quagga) to tear the session
    reported by Renaud Chaput

Version 1.0.1 - 7th of September 2010
 * Fixes an issue with some python versions (at least 2.5.2) when sending a large number of routes (several hundred). Some messages could be sent in multiple parts, causing the parser at the other end to barf (Thank you to Renaud Chaput for the bug report)