Content-Disposition: notification

disposition 型 notification (SIP)

[1] RFC 5438 - Instant Message Disposition Notification (2014-09-07 06:11:14 +09:00 版) <http://tools.ietf.org/html/rfc5438#section-9>
[2] RFC 5438 - Instant Message Disposition Notification (2014-09-07 06:11:14 +09:00 版) <http://tools.ietf.org/html/rfc5438#section-15.4>