Reviewable status: 0 of 1 files reviewed, 2 unresolved discussions (waiting on @jiceatscion and @oncilla)

doc/sig.rst line 80 at r3 (raw file):
How about adding back this sentence?

The Session ID and Stream ID are chosen by the sender but the tuple MUST be unique within a session.

doc/sig.rst line 25 at r3 (raw file):

====================

IP packets are encapsulated into SIG frames, which are sent as SCION/UDP datagrams.

IN the draft we had these few lines that explained reasons to use SIG framing instead of other protocols. How about we leave them somewhere?

Code snippet:

This protocol is designed to:

- provide independence from the underlying SCION path MTU which can increase and decrease over time.
- provide fast detection of packet loss and subsequent recovery of decapsulation for packets that weren't lost.
- support for multiple streams within a framing session such that independent packet sequences be tunneled in parallel.