See t_newtran() and t_check_trans() to create/check transaction state for certain requests:

http://www.kamailio.org/docs/modules/3.2.x/modules/tm.html#t_newtran
http://www.kamailio.org/docs/modules/3.2.x/modules/tm.html#t_check_trans

There is no method to check if responses are retransmissions - this is handled internally in tm module.

regards
Klaus

On 09.05.2012 11:54, Vineet Menon wrote:
Hi,

How do we detect a message as retransmitted message, in a transaction
oriented proxy?

Regards,

Vineet Menon




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