Subject: [rtcweb] SDP-SCTP: Max value for SDP max-message-size attribute?

From: Christer Holmberg <[email-masked]>
Date: Fri, 13 Feb 2015 13:28:29 +0000

Hi,

The MMUSIC SCTP-SDP draft defines the SDP max-message-size attribute, which can be used to indicate the maximum size of message that an entity is willing to receive on an SCTP association

I have received a comment on whether we should define a max value for the attribute.

When reading the rtcweb-data-channel draft, it says that a sender should not send messages bigger than 16 KB, unless interleaving is used.

As an entity can choose how big messages to send (as long as the message size is smaller than the max-message-size value), but suggestion would be to NOT define an attribute max value in the SCTP-SDP draft. Different usages (e.g. webrtc data channels) need to choose the size based on SCTP features supported etc.

Regards,

Christer