Just checking to see if this is the designed behavior.  The SL module will attempt to match ACKs for stateless replies and handle them (absorb them?).

The question I have is that it looks as though this ACK gets counted as dropped by the core.drop_requests from the KEX module.   Tested using this config:

#!KAMAILIO

loadmodule "pv"

loadmodule "sl"

loadmodule "xlog"

loadmodule "kex"

loadmodule "corex"

loadmodule "ctl"

modparam("sl", "bind_tm", 0)

route {

    xinfo("[$ci] $rm Request. Src:[$si:$sp] RURI:[$ru] To:[$tu] From:[$fu]\n");

    sl_send_reply("404", "Not Found");

}

event_route[sl:filtered-ack] {

    xnotice("sl:filtered-ack ACK [$ci] to local reply absorbed\n");

}

Then validate by kamcmd stats.fetch core:drop_requests

Is this the designed and “correct” behavior?

Kaufman