3 thoughts on - Get SIP Call-ID From ARI

• ‘pjsip_header’ is not a valid route. All possible routes are documented on the wiki, if it’s not there then it doesn’t exist.

  Instead you would use variable[1] to execute the PJSIP_HEADER dialplan function[2] or a better way would be the CHANNEL dialplan function[3] such as:

  GET /channels/{channelid}/variable?variable=CHANNEL(pjsip,call-id)

  Though I haven’t tested that.

  Newer versions also include the protocol identifier (Call-ID) in the channel ARI structure[4] which would be in events, or explicitly retrieved[5].

  [1]
  https://wiki.asterisk.org/wiki/display/AST/Asterisk+20+Channels+REST+API#Asterisk20ChannelsRESTAPI-getChannelVar
  [2]
  https://wiki.asterisk.org/wiki/display/AST/Asterisk+20+Function_PJSIP_HEADER
  [3] https://wiki.asterisk.org/wiki/display/AST/Asterisk+20+Function_CHANNEL
  [4]
  https://wiki.asterisk.org/wiki/display/AST/Asterisk+20+REST+Data+Models#Asterisk20RESTDataModels-Channel
  [5]
  https://wiki.asterisk.org/wiki/display/AST/Asterisk+20+Channels+REST+API#Asterisk20ChannelsRESTAPI-get

• I tried

  GET /channels/{channelid}/variable?variable=CHANNEL(pjsip,call-id)

  But it responds with

  “message”: “Channel not in Stasis application”

  Since I want to get the call-id for a channel not in stasis I guess that won’t work. Similarly, I can’t force the channel through my own code in the dialplan, so the PJSIP_HEADER function won’t work. So it looks like I’ll have to upgrade my Asterisk test system to get the Call-ID from the ARI event. It looks like it was added in Ast 16.

  Out of curiosity, I see that call-id is returned in the “protocol_id” field of channel data structure. However, since all channels in the same call must have the same Call-ID, how can this data be associated with a channel? Wouldn’t it have to be associated with a bridge? The Call-ID should not be available until two legs are bridged (I think).

  Brian

  From: asterisk-users [mailto:asterisk-users-bounces@lists.digium.com] Based on postings it should be possible to get the SIP Call-ID header value from the ARI. At what point is this value available ? As well, how do I retrieve that value – something like

  GET /channels/{channelId}/pjsip_header?key=Call-Id

  But that doesn’t work.

  ‘pjsip_header’ is not a valid route. All possible routes are documented on the wiki, if it’s not there then it doesn’t exist.

  Instead you would use variable[1] to execute the PJSIP_HEADER dialplan function[2] or a better way would be the CHANNEL dialplan function[3] such as:

  GET /channels/{channelid}/variable?variable=CHANNEL(pjsip,call-id)

  Though I haven’t tested that.

  Newer versions also include the protocol identifier (Call-ID) in the channel ARI structure[4] which would be in events, or explicitly retrieved[5].

  [1] https://wiki.asterisk.org/wiki/display/AST/Asterisk+20+Channels+REST+API#Asterisk20ChannelsRESTAPI-getChannelVar

  [2] https://wiki.asterisk.org/wiki/display/AST/Asterisk+20+Function_PJSIP_HEADER

  [3] https://wiki.asterisk.org/wiki/display/AST/Asterisk+20+Function_CHANNEL

  [4] https://wiki.asterisk.org/wiki/display/AST/Asterisk+20+REST+Data+Models#Asterisk20RESTDataModels-Channel

  [5] https://wiki.asterisk.org/wiki/display/AST/Asterisk+20+Channels+REST+API#Asterisk20ChannelsRESTAPI-get

• All channels in a call do not have the same Call-ID. Each channel has its own SIP Call-ID (if it is a PJSIP channel) as they are individual call legs and individual SIP dialogs.