rtpengine: query rtt per call leg

[jchavanton]

Type Of Change

• New feature (non-breaking change which adds new functionality)

Checklist:

• Tested changes locally

Description

This modification is to provide access to the new exposed metrics.

RTPengine is now keeping track of RTT per call leg
sipwise/rtpengine#1116

I also corrected the documentation as the RTT was always in microseconds not milliseconds.|

Kamailio config :

modparam("rtpengine", "mos_B_label_pv", "$avp(mos_B_label)")
modparam("rtpengine", "mos_max_roundtrip_B_pv", "$avp(mos_max_roundtrip_B)");
modparam("rtpengine", "mos_average_roundtrip_B_pv", "$avp(mos_average_roundtrip_B)");
modparam("rtpengine", "mos_average_roundtrip_leg_B_pv", "$avp(mos_average_roundtrip_leg_B)");

modparam("rtpengine", "mos_A_label_pv", "$avp(mos_A_label)")
modparam("rtpengine", "mos_max_roundtrip_A_pv", "$avp(mos_max_roundtrip_A)");
modparam("rtpengine", "mos_average_roundtrip_A_pv", "$avp(mos_average_roundtrip_A)");
modparam("rtpengine", "mos_average_roundtrip_leg_A_pv", "$avp(mos_average_roundtrip_leg_A)");

modparam("rtpengine", "mos_min_pv", "$avp(mos_min)")
modparam("rtpengine", "mos_max_roundtrip_pv", "$avp(mos_max_roundtrip)");
modparam("rtpengine", "mos_average_roundtrip_pv", "$avp(mos_average_roundtrip)");
modparam("rtpengine", "mos_average_roundtrip_leg_pv", "$avp(mos_average_roundtrip_leg)");

route[QOS] {
	$avp(mos_A_label) = "legA";	
	$avp(mos_B_label) = "legB";	
	rtpengine_query();
	xinfo("[QOS][Caller]rtt[$avp(mos_average_roundtrip_A)us]rtt_leg[$avp(mos_average_roundtrip_leg_A)]\n");
	xinfo("[QOS][Callee]rtt[$avp(mos_average_roundtrip_B)us]rtt_leg[$avp(mos_average_roundtrip_leg_B)]\n");
	xinfo("[QOS][Average]rtt[$avp(mos_average_roundtrip)us]rtt_leg[$avp(mos_average_roundtrip_leg)]\n");
}

[miconda]

Maybe @rfuchs wants to take a look, otherwise it can be merged in the near future. Thanks!