Hello Siddhardha/All , The offer answer RFC says that you should be ready to receive media as soon as you send the offer. That is where my doubt comes in ... If I start receiving my media before any answer from the other side , how do I know for sure that it's actually the intended called party who is sending me the packets. Also ,after I receive the answer if the called party plays the media from a different IP address than the one he is using to receive media , how do I know that it's actually the called party who is playing me the media , I looked into SRTP , but that does not seem to have a solution for this ... Regards , Sayan
________________________________ From: Siddhardha Garige [mailto:[EMAIL PROTECTED] Sent: Thursday, May 25, 2006 8:17 PM To: Sayan Chowdhury (WT01 - IP-Multimedia Carrier & Ent Networks); [email protected] Subject: Re: [Sip-implementors] Query on when to open RTP ports during offer/answer Sayan, Dont you have to wait for a response 183 or 200 OK before you open your RTP ports? Siddhardah [EMAIL PROTECTED] wrote: Hello All , Once I send an offer in in INVITE I am supposed to be ready to listen to media. However If I start getting media packets before getting the answer , I do not know for sure whether the called Party is playing me the media or somebody else is playing me the media. What do I do in this case ? Should I be rejecting the media packets till I get an answer ? Also if the called party plays the media from a different IP address from the one which he provides in the the SDP (for receiving media)how can I be sure it's not some kind of attack on my UA ? Regards , Sayan The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors ******************************************************* Siddhardha N. Garige Tampa, FL. Ph: (813)-298-4236. www.pbase.com/garige ******************************************************* ________________________________ Talk is cheap. Use Yahoo! Messenger to make PC-to-Phone calls. Great rates starting at 1ยข/min. <http://us.rd.yahoo.com/mail_us/taglines/postman7/*http://us.rd.yahoo.com/evt=39666/*http://messenger.yahoo.com> The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
