Hello,
the patch cannot be applied as it is. The comments contain references to
request processing, which is obviously wrong. Then I have seen code
specific to requests, like managing the request uri or dst uri -- these
fields shouldn't be set for replies, it's ok as safety to clear them up,
but not cloning.
From the patch I see the new function are only for internal usage, not
for config file. Are they supposed to be used only in the transaction
context (i.e., after the transaction is matched for reply)?
Cheers,
Daniel
On 7/4/13 5:24 PM, Richard Good wrote:
Hi
I've finally got working functionality for t-suspend and t_continue
for SIP responses in the tmp/tm_async_reply_support branch.
I've memory and load tested the branch and have also isolated the
changes so that if there are problems they will only be experienced if
you use the new API functions.
However keeping mind that TM can be tricky to program (as mentioned in
the documentation ;)) - I've included below a summary of the changes
and a git diff against the latest master. So the TM experts can have
a look and see if there are any obvious problems.
If there are no complaints or queries I will commit the changes to
master next week Friday (July 12).
Regards
Richard.
Change summary:
1. parser/msg_parser.h: added new message state FL_RPL_SUSPENDED
2. tm_load.c: new api functions: *t_suspend_reply*,
*t_continue_reply* and *t_cancel_suspend_reply*
3. t_suspend.c/h: new methods: *t_suspend_reply*, *t_continue_reply*
and *t_cancel_suspend_reply
*4. tm/t_reply.c: if msg is in state FL_RPL_SUSPENDED then we skip
sending the reply on
5. tm/t_reply.c/h: new methods to fake env for responses:
*faked_env_resp, faked_resp, free_faked_resp
*
6. API documentation to include new functions: *t_suspend_reply*,
*t_continue_reply* and *t_cancel_suspend_reply
*
*
*
*
*
On 18 March 2013 14:13, Richard Good <[email protected]
<mailto:[email protected]>> wrote:
Hi Daniel and other TM experts
We have been working on a prototype for being able to use the
t_suspend() and t_continue() methods for SIP responses. The
version in branch /tmp/tm_async_reply_support is working, though
still needs to be 100% tested and only works for 1 branch (i.e. no
forking)
Would it be possible for you to have a look at this branch code
and see if we are on the right track. The code is working but TM
(as mentioned in the documentation ;)) can be tricky to program
and we want to make sure we are not breaking anything, as the goal
is to get this into the master branch.
The changes we have done:
1. parser/msg_parser.h: added new message state FL_RPL_SUSPENDED
2. tm/h_table.h: added int suspended_request to ua_server and int
suspended_reply to ua_client
3. tm/t_suspend.c:t_suspend
1. Changed suspend method to check if the message is a
request or response and set the
suspended_request/suspended_reply variable accordingly
2. If its a request we do as the existing code
3. If its a response we get the correct uac branch, clone the
msg into t->uac[branch].reply and set the msg state to
FL_RPL_SUSPENDED
4. tm/t_reply.c: if msg is in state FL_RPL_SUSPENDED then we skip
sending the reply on
5. tm/t_suspend.c:t_continue
1. Check if this uas was suspended - if so this is a continue
for a request so continue with existing code
2. If not then we search for the branch that was suspended
3. Once branch is found unsuspend the message state
4. do pre-script, run_top_route and post scripts
5. Relay the reply using basically the same code we skipped
in step 4
First next step after we confirm we are on the right track is to
add forking support - this will require a new t_continue method
where the calling application passes in the branch of the
suspended reply when wanting to continue.
Any comments/feedback would be appreciated.
Regards
Richard.
On 11 March 2013 14:34, Daniel-Constantin Mierla
<[email protected] <mailto:[email protected]>> wrote:
Hello,
t_suspend() and t_continue() are only for requests at this moment.
Cheers,
Daniel
On 3/6/13 2:49 PM, Richard Good wrote:
Hi
We are using the t_suspend and t_continue functionality to
asynchronously send Diameter messages.
This works nicely when we suspend and resume on a SIP
request. However in some circumstances we want to send a
Diameter message on a SIP response.
I have found that the SIP responses continue to be relayed
despite being suspended and returning 0 to the cfg file.
I am investigating the cause but before I get any deeper does
anyone know if the t_suspend and t_continue functionality in
the tm module can be used on a SIP response?
Regards
Richard.
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