CSEQ must be higer than the previous INVITE. Ofcourse Call-ID must be same.
-----Original Message----- From: Voipers Portugal [mailto:[EMAIL PROTECTED] Sent: Sunday, January 15, 2006 8:05 AM To: Jerry Yin Cc: Uttam Kumar Sarkar; Ramesh; [email protected] Subject: Re: [Sip-implementors] Distinguishing Initail Invite fromReInvit es. To see if it's a reinvite I normally use CSEQ field. It's unique for each type of message in each call. So if you get the same CSEQ and it's a INVITE message, it means that it's a REINVITE. Jose Simoes On 1/13/06, Jerry Yin <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote: The way is to check the to-tag. If it is exist, it is a re-invite. Otherwise, it's the Invite. If the UA receives a invite with to-tag but there's no dialog, it should reject the request by a 481 "Call Leg/Transaction Does Not Exist" response. Jerry > -----Original Message----- > From: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > [mailto: <mailto:[EMAIL PROTECTED]> [EMAIL PROTECTED] Behalf Of Uttam > Kumar Sarkar > Sent: Friday, January 13, 2006 10:57 AM > To: 'Ramesh'; [email protected] <mailto:[email protected]> > Subject: Re: [Sip-implementors] Distinguishing Initail Invite > fromReInvit es. > > > Probably you must be storing the call-ids of all new calls. If > the INVITE's > call id matches your active call list then it's a re-INVITE. > > -----Original Message----- > From: Ramesh [mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ] > Sent: Friday, January 13, 2006 10:56 AM > To: [email protected] <mailto:[email protected]> > Subject: [Sip-implementors] Distinguishing Initail Invite from ReInvites. > > > Hi, > How can we distinguish between an Initial Invite and a re-Invite? Is it > by looking at the Tag in the To field or by someother means? The > problem on > hand is that we are using session timers using INVITES and > sometimes we get > a response from the uac as though it is a new call. Since the client does > not support session timers we are using reinvites to check if the > session is > still up from our side. > > Thanks in advance > -- > cheers > ramesh > _______________________________________________ > Sip-implementors mailing list > [email protected] <mailto:[email protected]> > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors <https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors> > > > > > NOTE: This message, including any attachments, may include privileged, > confidential and/or inside information. Any distribution or use of this > communication by anyone other than the intended recipient(s) is strictly > prohibited and may be unlawful. If you are not the intended recipient, > please notify the sender by replying to this message and then > delete it from > your system. Thank you. > _______________________________________________ > Sip-implementors mailing list > [email protected] <mailto:[email protected]> > https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors <https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors> > _______________________________________________ Sip-implementors mailing list [email protected] <mailto:[email protected]> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors <https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors> NOTE: This message, including any attachments, may include privileged, confidential and/or inside information. Any distribution or use of this communication by anyone other than the intended recipient(s) is strictly prohibited and may be unlawful. If you are not the intended recipient, please notify the sender by replying to this message and then delete it from your system. Thank you. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
