Hi, I am using a media relay which implements some internal loop detection by adding a non-IANA-registered SDP attribute to any offer or answer that passes through it:
a=CustomAttribute:GUID >From what I understood from RFC 4566 § 5.13, this isn't illegal, but such an attribute must be ignored. Now, there is a particular type of endpoint in use in this environment which takes that attribute from an incoming initial INVITE--which is, by definition, not locally intelligible--and copies it dumbly into its 2xx/SDP answer. Commonsensically, this seems like broken behaviour; if it doesn't understand the attribute, it must be ignored, per § 5.13. Beyond that, is there any specific proscription against doing this in the standard? Thanks! -- Alex -- Alex Balashov | Principal | Evariste Systems LLC Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
