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SDP traffic is dropped after an upgrade to R80.30 Jumbo Hotfix Take 215 Technical Level
Symptoms
  • SDP traffic is dropped after an upgrade to R80.30 Jumbo Hotfix Take 215.
  • The following drop appears in the drop debug:
    fw_log_drop_ex: Packet proto=17 x.x.x.x:x -> x.x.x.x:5060 dropped by fw_post_vm_chain_handler Reason: Handler 'sip_manager' drop;
  • A log with the following fields appears in SmartConsole logs:
    VoiP Reject Reason: Malformed SIP packet
    VoIP Reject Reason information: Invalid SDP header
  • SIP debug shows the following lines:
    fw ctl debug -m fw + sip
    fw ctl debug -m WS_SIP + all
    @;1509687;13Aug2020 9:43:55.703069;[cpu_3];[fw4_0];voip_handle_bool_protection: 43.17.18.32 is not allowed to open media ports on behalf of 43.17.18.48. not dropping. action=0. protection. track=-1. not logging; @;1509687;13Aug2020 9:43:55.703073;[cpu_3];[fw4_0];sip_save_sdp_invite: Failed - unexcpected pkt_type=180; @;1509687;13Aug2020 9:43:55.703076;[cpu_3];[fw4_0];sip_handle_sdp: failed to save SDP. dropping;

Cause
Due to a change in the code, SDP Status code 180 is not handled properly.


Solution
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