[asterisk-bugs] [JIRA] (ASTERISK-26951) chan_sip: ACK with SDP does not update a direct media bridge

[Jean Aunis - Prescom (JIRA)]

Jean Aunis - Prescom created ASTERISK-26951:
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             Summary: chan_sip: ACK with SDP does not update a direct media bridge
                 Key: ASTERISK-26951
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-26951
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/chan_sip/General
    Affects Versions: 14.3.0, 13.7.2
            Reporter: Jean Aunis - Prescom


This issue happens with chan_sip.

Given I have two SIP users Alice and Bob
Given Alice calls Asterisk
Given Asterisk calls Bob and bridges him with Alice in a direct media bridge
When Alice sends a re-INVITE, with the final ACK request containing a SDP with a new connection address
Then Asterisk does not send a re-INVITE to Bob with the new connection address

Expected : Asterisk sends a re-INVITE to Bob with the new connection address

To be clearer, here is a sequence diagram :
||Alice||  ||Asterisk||  ||Bob||
| |INVITE (SDP : c=@addrA1) --->|  |  |  |
| | <--- 100/180 |  |INVITE --->|  |
| |<--- 200|  | <--- 200 (SDP: c=@addrB1) |  |
| |<--- INVITE (SDP: c=@addrB1)| *direct media establishement* |INVITE (SDP: c=@addrA1) --->|  |
| |200 --->|  |<--- 200  |  |
| |INVITE --->|  |  |  |
| | <--- 200 |  |  |  |
| |ACK (SDP: c=@addrA2) --->|  |  |  |

At this point Asterisk should send a re-INVITE to Bob with @addrA2.




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