Paul Kyzivat wrote: > I'm not sure about INFO, but overlap is allowed for NOTIFY. Furthermore, > messages belonging to different usages of the same dialog can overlap - > e.g. UPDATE and NOTIFY. (Assuming you have multiple usages in the dialog.)
I think UPDATE can never overlap, because there can only be one outstanding offer/answer, cmiiw. Good point about CSeq below. -benny > *BUT* overlapping has the potential to get you into trouble except in a > few specific cases. The problem is that if the messages get reordered > before delivery, then when the second one arrives it will be seen as > having a CSeq that is too small, and so will fail. In some limited cases > this may be ok. In particular, if you have an event package where each > new NOTIFY supercedes the prior one, then all may be well. In all other > cases it will be a problem. > > So in practice it may really be necessary to serialize most messages in > a dialog. > > Paul _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
