Opened 10 years ago

Last modified 5 years ago

#9675 new defect

SIMPLE: Request retried with credentials with same branch and cseq number, ie. same transaction

Reported by: mikma Owned by: seanegan
Milestone: Patches Needing Review Component: SIMPLE
Version: 2.5.5 Keywords:
Cc: dohmniq


When 401 or 407 is received for a request and it's decided that the request should be retried with credentials, then the new request must be sent in a new transaction with a new branch id and cseq number.

Otherwise the SIP proxy or server which received the request may take it as a re-transmission of the initial request without credentials, and therefore re-transmits its 401/407 response.

Tested on 2.5.5, but inspecting current development version of simple.c tells me the bug still exists in process_input_message.

Both PUBLISH, and SUBSCRIBE requests publishing current status and subscribing to other users status are affected by this bug. But not REGISTER requests, which are handled differently.

Attachments (1)

simple-cseq-bump.patch (1.5 KB) - added by dohmniq 5 years ago.
patch to bump CSeq in SIMPLE for 401 responses

Download all attachments as: .zip

Change History (5)

comment:1 Changed 10 years ago by normanr

(This only happened to me when in UDP mode)

comment:2 Changed 8 years ago by Thub

I'm seeing that the CSeq isn't being incremented and branch remains the same for REGISTER requests in 2.7.9 using UDP. I can't really get any further to see if it's affecting other requests.

Changed 5 years ago by dohmniq

patch to bump CSeq in SIMPLE for 401 responses

comment:3 Changed 5 years ago by dohmniq

patch works for me using 2.10.9 on FreeBSD 10 connecting to Asterisk v11 server

comment:4 Changed 5 years ago by Robby

  • Milestone set to Patches Needing Review
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