Hello,

I'm interested in retrieving the reception time, in the UDP buffer, of the SIP packets handled by Kamailio. I see there is a "struct timeval tval" in "struct sip_msg", but this is the timestamp of reading the packet by Kamailio, so not what I'm looking for.

According to the kernel documentation, this could be achieved using SO_TIMESTAMPNS on the socket:

https://www.kernel.org/doc/Documentation/networking/timestamping.txt

Do you think adding this feature to Kamailio could be useful ?

To implement this we would need, I think: - Only buid this if SO_TIMESTAMPNS is supported (Linux >= 2.6.22) - Add a configuration to enable / disable this feature - Set the SO_TIMESTAMPNS flag when creating the socket - Add a field in "struct sip_msg" to store the new timestamp - When receiving a packet, read the ancillary data, extract the SO_TIMESTAMPNS information and store the timestamp in "struct sip_msg" - Provide a new PV to make this accessible from Kamailio script

What do you think ?

Regards, Nicolas.

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