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Re: [MMUSIC] JSEP Issue #394: What appears in m= lines.

Roman Shpount <roman@telurix.com> Tue, 17 January 2017 01:35 UTC

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References: <52E4A8FC978E0241AE652516E24CAF001E483F95@ESESSMB309.ericsson.se> <CABcZeBPznLKNHek-SGE5Ly6QTOBL-j65sZBb5MbwQVkmBkpyFw@mail.gmail.com> <9110d772-9269-7fed-3ed4-5269d49acb84@alvestrand.no> <282955c7-d077-105b-6a99-a0f5ede87d91@ericsson.com> <CABcZeBPtMMR-xC_=pr1umBWY1CPkAm1J=T=Q_1F1bLNkZwtJkg@mail.gmail.com> <D4A2966B.15C88%christer.holmberg@ericsson.com> <CABcZeBOS+b_bdgaTnQfsNAhdf7g=fspyYON2r5=BoKvPD-32Rw@mail.gmail.com> <7594FB04B1934943A5C02806D1A2204B4BF78DE0@ESESSMB209.ericsson.se> <CAD5OKxtN=sHrGoQU9D=WLXWQwNpCqOT5P6ZwhkaS1945VnTT-Q@mail.gmail.com> <CABcZeBN+MGKD_opEq7bKeafb46o3=jKyMEKLDKQ-Mj8a5eezyg@mail.gmail.com> <CAD5OKxuqBeE3VkpRp-Leyyf1nzh2wwPG0giwbtcFOwJ8AecG8w@mail.gmail.com> <CABcZeBOrPzqKh2CWMqHCz8vFLvT20WDqL7_FK=SPnZ_PXn_P_A@mail.gmail.com> <CAD5OKxtST7PN8v=K5G0JYoaK5yt+Fjdio=qJrGRbNOE4CAvSew@mail.gmail.com> <CABcZeBMP4SdneHo6Bh6Y-gu2wLAhrKFGMyGW2wis9MqpaJG-Pg@mail.gmail.com>
From: Roman Shpount <roman@telurix.com>
Date: Mon, 16 Jan 2017 20:35:43 -0500
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To: Eric Rescorla <ekr@rtfm.com>
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Cc: Magnus Westerlund <magnus.westerlund@ericsson.com>, mmusic WG <mmusic@ietf.org>, Christer Holmberg <christer.holmberg@ericsson.com>
Subject: Re: [MMUSIC] JSEP Issue #394: What appears in m= lines.
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After considering your arguments regarding trickle ICE argument I agree
with you.

To summarize, I can live with the following:

1. JSEP end point MUST send an offer with UDP/DTLS/SCTP or UDP/TLS/RTP/SAVPF
2. If JSEP end point receives the offer, it MUST response with the same
transport even if no ice candidate matching this protocol are present in
the answer
3. If non JSEP end point responds with a protocol that does not match the
offer, this is considered an error regardless of the ICE candidate supplied
in the answer.

I do agree to this only within the limit of JSEP. Outside of JSEP it needs
to be discussed in more detail, since things like ICE mismatch will need to
be considered.

Regards,
_____________
Roman Shpount

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