Current devel version will be numbered 4.4.0 and it is planned to be released during first trimester of 2016.

Previous devel version was 4.3.x (released on June, 2015), see what was new in that release at:

• http://www.kamailio.org/wiki/features/new-in-4.3.x

This is a draft of new features added in devel version, manually updated, thus not always synchronized with what is new in source code repository.

• reports config execution for unit test evaluation
• http://kamailio.org/docs/modules/devel/modules/cfgt.html

• cryptographic functions for use in config file
• http://kamailio.org/docs/modules/devel/modules/crypto.html

• http queries using curl library
• http://kamailio.org/docs/modules/devel/modules/curl.html

• send log messages to custom backend
• http://kamailio.org/docs/modules/devel/modules/log_custom.html

• send log messages to systemd journal
• http://kamailio.org/docs/modules/devel/modules/log_systemd.html

• sms operations for sip messages
• http://kamailio.org/docs/modules/devel/modules/smsops.html

• statistics collector providing reports
• http://kamailio.org/docs/modules/devel/modules/statsc.html

• new acc_prepare_always parameter to allow preparation of the request no matter if the acc_prepare_flag is set at the moment of the transaction creation. See sr-user discussion

• export registrar.lookup_to_dset to app_lua interface
• export many sdpops functions to LUA

• module timer processes based on workers parameter

• added class of auth session to know more info about auth session - for example: ims_qos can now report Rx session for Reg or for media
• CER/CEA retry if send/receive FD disappeared
• evaluate the supported_vendor_id-AVP during CER/CEA
• load balancing timer has millisecond resolution

• sleep() and usleep() accept vars as parameter

• added file_read() and file_write() functions
  • file_read(fpath, var) - read content of a text file into a variable
  • file_write(fpat, content) - write content of parameter to a text file

• support 'order by' in raw query

• add support for static and dynamic, module specific, logging facility
• new dbg_sip_msg() config function, which prints how the sip message would look like if it were to be sent out at that point in config

• re-entrant mutex for dialogs hash table slots
• run event_route[dialog:end] in case of dialog termination by interface commands
• make dialog context available in event route tm:local-request
• new parameter db_skip_load to skip loading dialogs on startup

• relative weight distribution added - it is possible to assign “rweight” (relative weight) param to each host in destination group. rweight is in the integer range from 1 to 100
• added new probing_mode=3 to always probe flagged gateways

• implement deleted contact replication

• allow 'type' field in domain_attrs to be a DB1_BIGINT, makes it work with MySQL views on 64bit systems

• support for symbols “#*+” in drouting trees

• implemented receive buffering per connected client

• improved error message when loading from database
• htable.dump - added the type of the value to the result

• added option to set destination host for MAR requests

• added Multiple-Services Indicator
• allow ro session id to be used from cfg file as avp

• make Release-Reason from QoS configurable
• option to add Extra-Header, in case QoS fails during a session
• added Rx-Specific-Action AVPs to work with some PCRFs

• added functionality to unREGISTER a contact, eg. based on a failed network ping
• set received host, proto and port when searching for pcontact

• added counters for reporting hashtable usage - collision slot count for contacts and subscriptions
• implemented overwrite oldest contact behaviour

• allow null json error property in rpc response

• add max_conn_attempt parameter to control max number of reconnections

• support alternative federated exchanges
• allow multiple simultaneous servers
• add async query feature - suspend the transaction on send and continue on return or timeout

• support VERSION_NODATE and VERSION_DATE for reproducible builds

• added priority_ordering module parameter - allows ordering of matched gateways only by priority and weight

• allow for larger (max 64) prefix values to be used (e.g., case of uuid, ipv6)

• support filter contacts by server_id

• added path and +instance support

• new protocol between pdb_server and kama pdb module

• match trusted rules considering priority and regexp over r-uri
  • two new columns to set priority of the rule as well as regular expression matching over r-uri

• added support for custom params as contact parameters (e.g. <unknown-param name=“+g.oma.sip-im”></unknown-param>)

• pv_var_to_xavp script function to copy $var values to $xavp
• transformation to remove all non-numeric parts of a string
• add auth digest pseudo variables
  • $adn - auth nonce
  • $adc - auth cnonce
  • $adr - auth response
  • $ado - auth opaque
• pv_var_to_xavp() - copy script variables values to xavps

• add contact and recieved values to xavp_rcd
• set xavp_rcd on registered()
• export lookup_to_dset with uri to config
• allow registered() in any route

• add enable_double_rr_always option

• new fifo command, namely nh_ping_rtpp, which pings the given proxy or all proxies, and if a proxy does not respond, disable it temporarily
• try the next media relay available if the limit reached reply is received
• unset “don't fragment” ip header flag
• new read_sdp_pv parameter - this parameter allows to specify a script var or AVP for rtpengine to get the SDP from, instead of the SIP message body

• insert From URI domain, To URI domain and request URI domain to database
• added homer5 functionality to sipcapture module

• add refresher parameter in order to follow RFC 4028

• can use IPv6 as server address

• keepalive functions enabled on BSD

• use xavps for t_load_contacts/t_next_contacts/t_next_contact_flow
• execute the onsend_route for responses forwarded by tm module - not executed for local generated sip responses
• enable drop in onsend_route for tm replies

• added module specific satistics
• t_store(…) accepts uri as parameter
• ts_append_to() can take uri as parameter
• removed usrloc dependency

• support filter by server_id at get_all_ucontacts
• new module option to support preload using server_id as filter
• new matching mode: CALLID_ONLY
• new param to skip non-local location record - yf set, kamailio will skip record if socket value doesn't in listening socket list when loading record from database

• added optional parameter for setting additional http headers
• option to trim leading and trailing white spaces in http response - new parameter http_response_trim to control it; default is 0 - don't trim (backward compatible); set to 1 for enabling trimming
• new parameter http_response_mode to control what response part is returned
  • if http_response_mode=0, only the first line is returned
  • if http_response_mode=1, all the response is returned

• added support for SIP message fragmentation
  • websocket connections are created with a BUF_SIZE (64K) buffer used for concatenating frames
  • continuation frames (fragments) are supported for the SIP sub-protocol

• convenience functions for various log levels
  • xinfo(), xnotice(), xwarn(), xerr(), xbug(), xcrit(), xalert()

• new parameter async_usleep - add option to do usleep() before processing async tasks
  • could help saving cpu usage on vms with immediate interruptions triggered to recvfrom()

• cast operator (int) converts hex strings as well - in addition to dec string
• name of the structure exported by a module can be prefixed with module name

• display the 2 levels matrix in TLSF status
• shared (shm) memory manager can be selected with -x command line parameter at startup
• private (pkg) memory manager can be selected with -X command line parameter at startup. If this parameter is omitted, the value of -x is used

• support VERSION_NODATE and VERSION_DATE for reproducible builds

• added mongodb schema files
  • custom json format specifying structure of collections/tables
  • version-create.mongo - a script with mongo commands to fill the version collection/table