Previous stable version was 4.4.x (released on March, 2016), see what was new in that release at:

• http://www.kamailio.org/wiki/features/new-in-4.4.x

This is a draft of new features added in v5.0.x, manually updated, thus not always synchronized with what is new in source code repository.

• execute embedded JavaScript code inside kamailio.cfg
• relies on Duktape JS engine
• http://kamailio.org/docs/modules/devel/modules/app_jsdt.html

• IMS online charging module
• http://kamailio.org/docs/modules/devel/modules/ims_ocs.html

• nsq.io connector for kamailio.cfg
• http://kamailio.org/docs/modules/devel/modules/nsq.html

• RPC commands related to presence user agent functionality
• http://kamailio.org/docs/modules/devel/modules/pua_rpc.html

• rabbitmq client for configuration script
• http://kamailio.org/docs/modules/devel/modules/rabbitmq.html

• JSON-based access to SS7 packets received over HEP
• http://kamailio.org/docs/modules/devel/modules/ss7ops.html

• ability to execute routing blocks written directly in Lua

• ability to execute routing blocks written directly in Python

• added option to use SHA-256 encryption algorithm for digest authentication
• add an option to include an Authentication-Info header in the response to a successful authentication

• new config variable replace_query
  • Tells if the ODBC replace query is supported by the DB odbc driver
  • Just like insert, but update the row if it exists otherwise insert

• new rpc function: dlg.terminate_dlg
  • terminates a single dialog, identified by a Call-ID.
  • terminates an ongoing dialog by sending BYE in both directions

• single digit is now valid in function enum_query
  • is_e164() returns true for a single digit (previously two digits)

• support for tagging connections and select for sending based on tag
  • evapi_set_tag(tname)
  • evapi_multicast(data, tag)
  • evapi_async_multicast(data, tag)
  • evapi_unicast(data, tag)
  • evapi_async_unicast(data, tag)

• new core stats
  • RPC request: stats.get_statistics all
  • requests by method
    • core:rcv_requests_invite
    • core:rcv_requests_cancel
    • core:rcv_requests_ack
    • core:rcv_requests_bye
    • core:rcv_requests_info
    • core:rcv_requests_register
    • core:rcv_requests_subscribe
    • core:rcv_requests_notify
    • core:rcv_requests_message
    • core:rcv_requests_options
    • core:rcv_requests_prack
    • core:rcv_requests_update
    • core:rcv_requests_refer
    • core:rcv_requests_publish
  • replies by status code
    • core:rcv_replies_1xx
    • core:rcv_replies_18x
    • core:rcv_replies_2xx
    • core:rcv_replies_3xx
    • core:rcv_replies_4xx
    • core:rcv_replies_401
    • core:rcv_replies_404
    • core:rcv_replies_407
    • core:rcv_replies_480
    • core:rcv_replies_486
    • core:rcv_replies_5xx
    • core:rcv_replies_6xx

• added parameters to control connect and command timeouts
  • connect_timeout (int)
  • cmd_timeout (int)

• new module parameter `force_delete`
  • disabled by default
  • enabling this parameter will delete expired presentity records without updating watchers (no NOTIFY)

• new module parameter `retrieve_order_by`
  • default value is “priority”
  • Used to set the order-by of the db query for fetching the presence records

• new function pv_evalx(dst, fmt)
  • The fmt string is evaluated twice for exiting variables, the result is stored in dst variable.

• Add expiry value to the xavp.
  • handy if Kamailio for some reason changes the expiry value (min, max or variations caused by expiry_range)

• new 'unidirectional' flag in Sipwise rtpengine
  • allows kernelization of one-way streams

• new module parameters:
  • onhold_bflag, if bflag is set skips parsing SDP and sets onhold
  • server_address, force Contact header address in replies

• sca_call_info_update(): new to/from URI parameters
  • skips parsing message for To/From header values and uses URI values from parameters

• new config variable $sdp(body)
  • returns the sdp body as raw string
• new optional parameter to sdp_remove_line_by_prefix script function
  • sdp_remove_line_by_prefix(string [, mtype])
  • mtype can be provided to apply the operations only to the streams matching m=mtype

• new pseudo variables
  • $pcv(orig) - returns orig-ioi from P-Charging-Vector header
  • $pcv(term) - returns term-ioi from P-Charging-Vector header

• added $ws_conid pseudo variable
  • gives id of closed connection in websocket:closed event route

• print tos value if socket option for it cannot be set
• skip unusable network interfaces
  • no IP addr associated
  • address family AF_PACKET

A new framework (named kemi - kamailio embedded interface) was added, allowing to writing routing blocks in embedded languages such as Lua, JavaScript or Python:

• http://www.kamailio.org/wiki/devel/config-engines

• log_prefix_mode
  • If set to 1, then the log prefix is evaluated before/after each config action
  • needs to be set when the log_prefix has variables that are different based on the context of config execution
    • e.g., $cfg(line))

• latency_cfg_log
  • Log message with the duration of executing request route or reply route is printed to syslog

• mcast
  • Specify interface to join multicast group for multicast listen address

• rr module parameter enable_full_lr now defaults to 0
• no more lr=on in Record-Route

• use t_precheck_trans() to catch retransmissions faster

• drop silently traffic from scanners

• added option to block 401/407 from downstream

• now interacts with Kamailio via a fifo file using jsonrpcs module
  • CTLENGINE is RPCFIFO by default
  • RPCFIFOPATH has to be set to the fifo file created by jsonrpcs module

• kamctl rpc command is available for sending raw jsonrpc commands
  • see documentation for all RPC methods
  • the prefix s: or i: can be used to enforce type string or int for parameters
    • by default forwards number cli parameters as number type in jsonrpc commands

  kamctl rpc jsonrpc.echo abc 123
  kamctl rpc jsonrpc.echo s:abc i:123
  kamctl rpc jsonrpc.echo s:888 i:123
  kamctl rpc core.version
  

• new command line tool
• kamcli is aiming at being a modern and extensible alternative to the shell script kamctl
• communicates to Kamailio via jsonrpcs module
• https://github.com/kamailio/kamcli