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siptrace: Update doc for the two new modparams

Stefan Mititelu authored on 10/08/2022 07:24:51
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@@ -656,6 +656,7 @@ modparam("siptrace", "evcb_msg", "ksr_siptrace_msg")
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                 <title><varname>trace_dialog_ack</varname> (str)</title>
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                 <para>
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 			Enable tracing of in-dialog ACK.
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+			Before this param, one must have set the onsend() route and captured the outgoing ACK there.
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                 </para>
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                 <para>
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 			Default value is 1 (enabled).
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@@ -674,6 +675,8 @@ modparam("siptrace", "trace_dialog_ack", 1)
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                 <title><varname>trace_dialog_spiral</varname> (str)</title>
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                 <para>
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 			Enable tracing of dialog spirals.
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+			A spiraled dialog is a dialog established by a SIP INVITE that loops back to the same kamailio(as next hop).
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+			Right now, inside the siptrace code, a spiraled dialog is identified by (*params->param == NULL).
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                 </para>
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                 <para>
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 			Default value is 1 (enabled).