Hi Klaus,
Klaus Darilion wrote:
Retransmissions are good (most of the time). Somehow the ser
script would need to know that there is another thread tending to
a DNS lookup. How does my script know if a message is original,
or a retransmission anyway?
It seems to me that the tm module should be reaping the retransmits.
At first the proxy should reply 100 trying to stop retransmissions.
this is very and elegant to do with the new flags in t_reply(). You can
statelessly send a 100 and configure t_relay() not to do it again. See:
http://www.openser.org/docs/modules/1.2.x/tm.html#AEN342
letting t_relay() to auto generate the 100 is in most of the case
futile, as it is too late.
Further, the retransmissions should be absorbed by tm - if not then we
should analyze it.
the TM functions do that, but again, in most of the case it, as the
relaying is done at the end of processing, it can be a wast of
computation and time - just to apply all changes and perform ops to
figure out at the end that the request was a retransmission.
So, you can use the t_check_trans() function from the beginning:
http://www.openser.org/docs/modules/1.2.x/tm.html#AEN482
the great part is that the function does not affect the further
processing and has no computation penalties.
regards,
bogdan
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