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From: Alan Ford <alan.ford@gmail.com>
In-Reply-To: <7C3C61AA-2849-4918-A86C-D62E1B60F223@ericsson.com>
Date: Fri, 4 May 2018 08:27:03 +0100
Cc: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>, "bfcpbis@ietf.org" <bfcpbis@ietf.org>
Message-Id: <A4E14607-64A0-4AD3-AFF5-6DA9569B0C90@gmail.com>
References: <60538334-75B5-4A93-8561-2CD2B7DC4295@cisco.com> <7C3C61AA-2849-4918-A86C-D62E1B60F223@ericsson.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>
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Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute
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Hi all,

Apologies, for some reason I totally missed this mail. I think the =
intention was for bfcpver to be included in both; prior to Christer=92s =
recent clarification text this was not so obvious with the way the text =
flowed. Now it is, I think this needs correction.

Changing text to support this would be simple, just changing in the =
offer (13.1) section:

   When the offerer creates an initial offer, the offerer MUST associate
   an SDP 'floorctrl' attribute (Section 5 =
<https://tools.ietf.org/html/draft-ietf-bfcpbis-rfc4583bis-22#section-5>) =
with the 'm' line.

To:

   When the offerer creates an initial offer, the offerer MUST associate
   an SDP 'floorctrl' attribute (Section 5 =
<https://tools.ietf.org/html/draft-ietf-bfcpbis-rfc4583bis-22#section-5>) =
and an SDP 'bfcpver' attribute
   (Section 8) with the 'm' line.

And removing the line about bfcpver from the bullet point list.

And for the answer section (13.2), move the bfcpver bullet point to the =
first list.

Ultimately the bfcpver attribute is informational; we do not specify any =
algorithms. Endpoints will decide what version to use based on what is =
shared and thus what is known about the peer=92s capabilities. But it =
would remove any ambiguity to have this explicitly stated by both ends.

Regards,
Alan

> On 27 Mar 2018, at 06:07, Christer Holmberg =
<christer.holmberg@ericsson.com> wrote:
>=20
> Hi,
>=20
> There is a way to determine a default value of the attribute is not =
present, so that is not a problem.
>=20
> The question is whether the floor control server should care about a =
value sent (either explicit or implicit default) by the floor control =
client or not, or whether the only one sending a valid value is the =
floor control server.
>=20
> I am fine either way, but if both the client and server send it we =
will need additional procedures. So, it would probably be easiest to =
keep the text saying that only the server sends it.
>=20
> Regards,
>=20
> Christer=20
>=20
> Sent from my iPhone
>=20
> On 27 Mar 2018, at 6.43, Charles Eckel (eckelcu) <eckelcu@cisco.com =
<mailto:eckelcu@cisco.com>> wrote:
>=20
>> (as an individual)
>> =20
>> Hi Christer,
>> =20
>> The offer/answer language used for confid, userid, and floorid, was =
used for bfcpver as well. I do not see any harm in a floor control =
client including a bfcpver attribute in an SDP offer or answer, but the =
draft is currently silent on this.
>> If I had it to do over, I would probably opt for being explicit that =
the bfcpver attribute is required in all offers and answers, but I do =
not think we can make that change now. The example is okay as is. It =
would also be fine to remove the bfcpver attribute from the answer in =
which he answerer is a client.
>> Alternatively, I suppose we could as that the bfcpver is optional =
(i.e. MAY include) when acting as a floor control client. Thoughts?
>> =20
>> Charles
>> =20
>> From: bfcpbis <bfcpbis-bounces@ietf.org =
<mailto:bfcpbis-bounces@ietf.org>> on behalf of Christer Holmberg =
<christer.holmberg@ericsson.com <mailto:christer.holmberg@ericsson.com>>
>> Date: Monday, March 26, 2018 at 12:14 AM
>> To: "bfcpbis@ietf.org <mailto:bfcpbis@ietf.org>" <bfcpbis@ietf.org =
<mailto:bfcpbis@ietf.org>>
>> Subject: [bfcpbis] 4583bis: SDP bfcpver attribute
>> =20
>> Hi, <>
>> =20
>> I would like to clarify the usage of the SDP =91bfcpver' attribute.
>> =20
>> According to the procedures, the attribute is only inserted by the =
floor control server. I double checked this in older versions of =
4583bis. However, in the examples of older versions the attribute is =
included in an SDP answer, even if the answerer indicates that it will =
be floor control client.
>> =20
>> So, what is the correct way?
>> =20
>> Regards,
>> =20
>> Christer
>> =20
>> =20
> _______________________________________________
> bfcpbis mailing list
> bfcpbis@ietf.org
> https://www.ietf.org/mailman/listinfo/bfcpbis


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Hi all,<div class=3D""><br class=3D""></div><div =
class=3D"">Apologies, for some reason I totally missed this mail. I =
think the intention was for bfcpver to be included in both; prior to =
Christer=92s recent clarification text this was not so obvious with the =
way the text flowed. Now it is, I think this needs correction.</div><div =
class=3D""><br class=3D""></div><div class=3D"">Changing text to support =
this would be simple, just changing in the offer (13.1) =
section:</div><div class=3D""><br class=3D""></div><div class=3D""><pre =
class=3D"newpage" style=3D"font-size: 13.333333015441895px; margin-top: =
0px; margin-bottom: 0px;">   When the offerer creates an initial offer, =
the offerer MUST associate
   an SDP 'floorctrl' attribute (<a =
href=3D"https://tools.ietf.org/html/draft-ietf-bfcpbis-rfc4583bis-22#secti=
on-5" class=3D"">Section 5</a>) with the 'm' line.</pre><div =
class=3D""><br class=3D""></div></div><div class=3D"">To:</div><div =
class=3D""><br class=3D""></div><div class=3D""><pre class=3D"newpage" =
style=3D"font-size: 13.333333015441895px; margin-top: 0px; =
margin-bottom: 0px;">   When the offerer creates an initial offer, the =
offerer MUST associate
   an SDP 'floorctrl' attribute (<a =
href=3D"https://tools.ietf.org/html/draft-ietf-bfcpbis-rfc4583bis-22#secti=
on-5" class=3D"">Section 5</a>) and an SDP 'bfcpver' attribute</pre><pre =
class=3D"newpage" style=3D"font-size: 13.333333015441895px; margin-top: =
0px; margin-bottom: 0px;">   (Section 8) with the 'm' line.</pre><div =
class=3D""><br class=3D""></div></div><div class=3D"">And removing the =
line about bfcpver from the bullet point list.</div><div class=3D""><br =
class=3D""></div><div class=3D"">And for the answer section (13.2), move =
the bfcpver bullet point to the first list.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Ultimately the bfcpver attribute is =
informational; we do not specify any algorithms. Endpoints will decide =
what version to use based on what is shared and thus what is known about =
the peer=92s capabilities. But it would remove any ambiguity to have =
this explicitly stated by both ends.</div><div class=3D""><br =
class=3D""></div><div class=3D"">Regards,</div><div =
class=3D"">Alan</div><div class=3D""><br class=3D""><div><blockquote =
type=3D"cite" class=3D""><div class=3D"">On 27 Mar 2018, at 06:07, =
Christer Holmberg &lt;<a href=3D"mailto:christer.holmberg@ericsson.com" =
class=3D"">christer.holmberg@ericsson.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><span =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" class=3D"">Hi,</span><div style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D""><br class=3D""></div><div style=3D"font-family: Helvetica; =
font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" =
class=3D"">There is a way to determine a default value of the attribute =
is not present, so that is not a problem.</div><div style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><br class=3D""></div><div style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D"">The question is whether the floor control server should =
care about a value sent (either explicit or implicit default) by the =
floor control client or not, or whether the only one sending a valid =
value is the floor control server.</div><div style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D""><br class=3D""></div><div style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;" class=3D"">I am fine either way, but if both the client and server =
send it we will need additional procedures. So, it would probably be =
easiest to keep the text saying that only the server sends it.</div><div =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><br class=3D""></div><div =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D"">Regards,</div><div =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><br class=3D""></div><div =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D"">Christer&nbsp;<br =
class=3D""><br class=3D""><div class=3D"">Sent from my iPhone</div><div =
class=3D""><br class=3D"">On 27 Mar 2018, at 6.43, Charles Eckel =
(eckelcu) &lt;<a href=3D"mailto:eckelcu@cisco.com" style=3D"color: =
rgb(149, 79, 114); text-decoration: underline;" =
class=3D"">eckelcu@cisco.com</a>&gt; wrote:<br class=3D""><br =
class=3D""></div><blockquote type=3D"cite" class=3D""><div class=3D""><div=
 class=3D"WordSection1" style=3D"page: WordSection1;"><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-size: 12pt; =
font-family: 'Times New Roman', serif;" class=3D"">(as an =
individual)<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-size: 12pt; font-family: 'Times New =
Roman', serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-size: 12pt; =
font-family: 'Times New Roman', serif;" class=3D"">Hi Christer,<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-size: 12pt; font-family: 'Times New =
Roman', serif;" class=3D"">The offer/answer language used for confid, =
userid, and floorid, was used for bfcpver as well. I do not see any harm =
in a floor control client including a bfcpver attribute in an SDP offer =
or answer, but the draft is currently silent on this.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">If I had it to do over, I would probably opt for being =
explicit that the bfcpver attribute is required in all offers and =
answers, but I do not think we can make that change now. The example is =
okay as is. It would also be fine to remove the bfcpver attribute from =
the answer in which he answerer is a client.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">Alternatively, I suppose we could as that the bfcpver is =
optional (i.e. MAY include) when acting as a floor control client. =
Thoughts?<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span style=3D"font-size: 12pt; font-family: 'Times New =
Roman', serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span style=3D"font-size: 12pt; =
font-family: 'Times New Roman', serif;" class=3D"">Charles<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div =
style=3D"border-style: solid none none; border-top-color: rgb(181, 196, =
223); border-top-width: 1pt; padding: 3pt 0in 0in;" class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><b class=3D""><span style=3D"font-size: =
12pt;" class=3D"">From:<span =
class=3D"Apple-converted-space">&nbsp;</span></span></b><span =
style=3D"font-size: 12pt;" class=3D"">bfcpbis &lt;<a =
href=3D"mailto:bfcpbis-bounces@ietf.org" style=3D"color: rgb(149, 79, =
114); text-decoration: underline;" =
class=3D"">bfcpbis-bounces@ietf.org</a>&gt; on behalf of Christer =
Holmberg &lt;<a href=3D"mailto:christer.holmberg@ericsson.com" =
style=3D"color: rgb(149, 79, 114); text-decoration: underline;" =
class=3D"">christer.holmberg@ericsson.com</a>&gt;<br class=3D""><b =
class=3D"">Date:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Monday, March 26, 2018 =
at 12:14 AM<br class=3D""><b class=3D"">To:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>"<a =
href=3D"mailto:bfcpbis@ietf.org" style=3D"color: rgb(149, 79, 114); =
text-decoration: underline;" class=3D"">bfcpbis@ietf.org</a>" &lt;<a =
href=3D"mailto:bfcpbis@ietf.org" style=3D"color: rgb(149, 79, 114); =
text-decoration: underline;" class=3D"">bfcpbis@ietf.org</a>&gt;<br =
class=3D""><b class=3D"">Subject:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>[bfcpbis] 4583bis: SDP =
bfcpver attribute<o:p class=3D""></o:p></span></div></div><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><a name=3D"_MailOriginalBody" class=3D"">Hi,<o:p =
class=3D""></o:p></a></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">I would like to =
clarify the usage of the SDP =91bfcpver' attribute.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">According to the =
procedures, the attribute is only inserted by the floor control server. =
I double checked this in older versions of 4583bis. However, in the =
examples of older versions the attribute is included in an SDP answer, =
even if the answerer indicates that it will be floor control client.<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">So, what is the =
correct way?<o:p class=3D""></o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">Regards,<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><span class=3D"">Christer<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><span class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div></div><div class=3D""><pre =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 10pt; font-family: =
'Courier New'; font-variant-ligatures: normal; orphans: 2; widows: 2; =
word-wrap: break-word; white-space: pre-wrap;" class=3D""><span =
class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></pre></div></div></div></blockquote></div><=
span style=3D"font-family: Helvetica; font-size: 12px; font-style: =
normal; font-variant-caps: normal; font-weight: normal; letter-spacing: =
normal; orphans: auto; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; widows: auto; word-spacing: =
0px; -webkit-text-stroke-width: 0px; float: none; display: inline =
!important;" =
class=3D"">_______________________________________________</span><br =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
none; white-space: normal; widows: auto; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><span style=3D"font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
float: none; display: inline !important;" class=3D"">bfcpbis mailing =
list</span><br style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px;" class=3D""><span =
style=3D"font-family: Helvetica; font-size: 12px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
orphans: auto; text-align: start; text-indent: 0px; text-transform: =
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!important;" class=3D""><a href=3D"mailto:bfcpbis@ietf.org" =
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Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
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text-align: start; text-indent: 0px; text-transform: none; white-space: =
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0px;" class=3D""><span style=3D"font-family: Helvetica; font-size: 12px; =
font-style: normal; font-variant-caps: normal; font-weight: normal; =
letter-spacing: normal; orphans: auto; text-align: start; text-indent: =
0px; text-transform: none; white-space: normal; widows: auto; =
word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: =
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Alan Ford <alan.ford@gmail.com>
CC: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>, "bfcpbis@ietf.org" <bfcpbis@ietf.org>
Thread-Topic: [bfcpbis] 4583bis: SDP bfcpver attribute
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Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute
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Hi,

> Apologies, for some reason I totally missed this mail. I think the intent=
ion was for bfcpver to be
> included in both; prior to Christer's recent clarification text this was =
not so obvious with the way
> the text flowed. Now it is, I think this needs correction.
>
> Changing text to support this would be simple, just changing in the offer=
 (13.1) section:
>

>   When the offerer creates an initial offer, the offerer MUST associate

>   an SDP 'floorctrl' attribute (Section 5<https://tools.ietf.org/html/dra=
ft-ietf-bfcpbis-rfc4583bis-22#section-5>) with the 'm' line.
>
> To:
>

>   When the offerer creates an initial offer, the offerer MUST associate

>   an SDP 'floorctrl' attribute (Section 5<https://tools.ietf.org/html/dra=
ft-ietf-bfcpbis-rfc4583bis-22#section-5>) and an SDP 'bfcpver' attribute

>   (Section 8) with the 'm' line.
>
> And removing the line about bfcpver from the bullet point list.
>
> And for the answer section (13.2), move the bfcpver bullet point to the f=
irst list.
>
> Ultimately the bfcpver attribute is informational; we do not specify any =
algorithms. Endpoints will
> decide what version to use based on what is shared and thus what is known=
 about the peer's capabilities.
> But it would remove any ambiguity to have this explicitly stated by both =
ends.

Regarding the algorithms, if the offerer indicates versions X, Y, Z, I thin=
k the answerer has to indicate a subset of those - it the answerer does not=
 support any of the versions it should not accept the BFCP establishment. S=
ure, we could allow the answerer to also include versions not included by t=
he offerer, for endpoints must use versions that both endpoints have indica=
ted support of.

Regards,

Christer






On 27 Mar 2018, at 06:07, Christer Holmberg <christer.holmberg@ericsson.com=
<mailto:christer.holmberg@ericsson.com>> wrote:

Hi,

There is a way to determine a default value of the attribute is not present=
, so that is not a problem.

The question is whether the floor control server should care about a value =
sent (either explicit or implicit default) by the floor control client or n=
ot, or whether the only one sending a valid value is the floor control serv=
er.

I am fine either way, but if both the client and server send it we will nee=
d additional procedures. So, it would probably be easiest to keep the text =
saying that only the server sends it.

Regards,

Christer
Sent from my iPhone

On 27 Mar 2018, at 6.43, Charles Eckel (eckelcu) <eckelcu@cisco.com<mailto:=
eckelcu@cisco.com>> wrote:
(as an individual)

Hi Christer,

The offer/answer language used for confid, userid, and floorid, was used fo=
r bfcpver as well. I do not see any harm in a floor control client includin=
g a bfcpver attribute in an SDP offer or answer, but the draft is currently=
 silent on this.
If I had it to do over, I would probably opt for being explicit that the bf=
cpver attribute is required in all offers and answers, but I do not think w=
e can make that change now. The example is okay as is. It would also be fin=
e to remove the bfcpver attribute from the answer in which he answerer is a=
 client.
Alternatively, I suppose we could as that the bfcpver is optional (i.e. MAY=
 include) when acting as a floor control client. Thoughts?

Charles

From: bfcpbis <bfcpbis-bounces@ietf.org<mailto:bfcpbis-bounces@ietf.org>> o=
n behalf of Christer Holmberg <christer.holmberg@ericsson.com<mailto:christ=
er.holmberg@ericsson.com>>
Date: Monday, March 26, 2018 at 12:14 AM
To: "bfcpbis@ietf.org<mailto:bfcpbis@ietf.org>" <bfcpbis@ietf.org<mailto:bf=
cpbis@ietf.org>>
Subject: [bfcpbis] 4583bis: SDP bfcpver attribute

Hi,

I would like to clarify the usage of the SDP 'bfcpver' attribute.

According to the procedures, the attribute is only inserted by the floor co=
ntrol server. I double checked this in older versions of 4583bis. However, =
in the examples of older versions the attribute is included in an SDP answe=
r, even if the answerer indicates that it will be floor control client.

So, what is the correct way?

Regards,

Christer



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<p class=3D"MsoNormal">&gt; Apologies, for some reason I totally missed thi=
s mail. I think the intention was for bfcpver to be
<br>
&gt; included in both; prior to Christer&#8217;s recent clarification text =
this was not so obvious with the way
<br>
&gt; the text flowed. Now it is, I think this needs correction.<o:p></o:p><=
/p>
</div>
<div>
<p class=3D"MsoNormal">&gt;<o:p>&nbsp;</o:p></p>
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<div>
<p class=3D"MsoNormal">&gt; Changing text to support this would be simple, =
just changing in the offer (13.1) section:<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&gt;<o:p>&nbsp;</o:p></p>
</div>
<div>
<pre>&gt;&nbsp;&nbsp; When the offerer creates an initial offer, the offere=
r MUST associate<o:p></o:p></pre>
<pre>&gt;&nbsp;&nbsp; an SDP 'floorctrl' attribute (<a href=3D"https://tool=
s.ietf.org/html/draft-ietf-bfcpbis-rfc4583bis-22#section-5">Section 5</a>) =
with the 'm' line.<o:p></o:p></pre>
<div>
<p class=3D"MsoNormal">&gt;<o:p>&nbsp;</o:p></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">&gt; To:<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&gt;<o:p>&nbsp;</o:p></p>
</div>
<div>
<pre>&gt;&nbsp;&nbsp; When the offerer creates an initial offer, the offere=
r MUST associate<o:p></o:p></pre>
<pre>&gt;&nbsp;&nbsp; an SDP 'floorctrl' attribute (<a href=3D"https://tool=
s.ietf.org/html/draft-ietf-bfcpbis-rfc4583bis-22#section-5">Section 5</a>) =
and an SDP 'bfcpver' attribute<o:p></o:p></pre>
<pre>&gt;&nbsp;&nbsp; (Section 8) with the 'm' line.<o:p></o:p></pre>
<div>
<p class=3D"MsoNormal">&gt;<o:p>&nbsp;</o:p></p>
</div>
</div>
<div>
<p class=3D"MsoNormal">&gt; And removing the line about bfcpver from the bu=
llet point list.<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&gt;<o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&gt; And for the answer section (13.2), move the bfc=
pver bullet point to the first list.<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&gt;<o:p>&nbsp;</o:p></p>
</div>
<div>
<p class=3D"MsoNormal">&gt; Ultimately the bfcpver attribute is information=
al; we do not specify any algorithms. Endpoints will
<br>
&gt; decide what version to use based on what is shared and thus what is kn=
own about the peer&#8217;s capabilities.
<br>
&gt; But it would remove any ambiguity to have this explicitly stated by bo=
th ends.<o:p></o:p></p>
</div>
<div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Regarding the algorithms, if the offerer indicates =
versions X, Y, Z, I think the answerer has to indicate a subset of those &#=
8211; it the answerer does not support any of the versions
 it should not accept the BFCP establishment. Sure, we could allow the answ=
erer to also include versions not included by the offerer, for endpoints mu=
st use versions that both endpoints have indicated support of.<o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Christer<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class=3D"MsoNormal">On 27 Mar 2018, at 06:07, Christer Holmberg &lt;<a h=
ref=3D"mailto:christer.holmberg@ericsson.com">christer.holmberg@ericsson.co=
m</a>&gt; wrote:<o:p></o:p></p>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif">Hi,</span><o:p></o:p></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif">There is a way to determine a default value of the=
 attribute is not present, so that is not a problem.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif">The question is whether the floor control server s=
hould care about a value sent (either explicit or implicit default) by the =
floor control client or not, or whether the only
 one sending a valid value is the floor control server.<o:p></o:p></span></=
p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif">I am fine either way, but if both the client and s=
erver send it we will need additional procedures. So, it would probably be =
easiest to keep the text saying that only the
 server sends it.<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif">Regards,<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif"><o:p>&nbsp;</o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif">Christer&nbsp;<o:p>=
</o:p></span></p>
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif">Sent from my iPhone<o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12.0pt"><span style=3D"font-s=
ize:9.0pt;font-family:&quot;Helvetica&quot;,sans-serif"><br>
On 27 Mar 2018, at 6.43, Charles Eckel (eckelcu) &lt;<a href=3D"mailto:ecke=
lcu@cisco.com"><span style=3D"color:#954F72">eckelcu@cisco.com</span></a>&g=
t; wrote:<o:p></o:p></span></p>
</div>
<blockquote style=3D"margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<div>
<p class=3D"MsoNormal">(as an individual)<span style=3D"font-size:11.0pt;fo=
nt-family:&quot;Calibri&quot;,sans-serif"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal">Hi Christer,<span style=3D"font-size:11.0pt;font-fam=
ily:&quot;Calibri&quot;,sans-serif"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal">The offer/answer language used for confid, userid, a=
nd floorid, was used for bfcpver as well. I do not see any harm in a floor =
control client including a bfcpver attribute in an SDP offer or answer, but=
 the draft is currently silent on
 this.<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-=
serif"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal">If I had it to do over, I would probably opt for bei=
ng explicit that the bfcpver attribute is required in all offers and answer=
s, but I do not think we can make that change now. The example is okay as i=
s. It would also be fine to remove
 the bfcpver attribute from the answer in which he answerer is a client.<sp=
an style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o=
:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal">Alternatively, I suppose we could as that the bfcpve=
r is optional (i.e. MAY include) when acting as a floor control client. Tho=
ughts?<span style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-=
serif"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal">Charles<span style=3D"font-size:11.0pt;font-family:&=
quot;Calibri&quot;,sans-serif"><o:p></o:p></span></p>
</div>
<div>
<p class=3D"MsoNormal">&nbsp;<span style=3D"font-size:11.0pt;font-family:&q=
uot;Calibri&quot;,sans-serif"><o:p></o:p></span></p>
</div>
<div style=3D"border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm">
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><b><span style=3D"font-family:&quot;Calibri&quot;,sa=
ns-serif">From:<span class=3D"apple-converted-space">&nbsp;</span></span></=
b><span style=3D"font-family:&quot;Calibri&quot;,sans-serif">bfcpbis &lt;<a=
 href=3D"mailto:bfcpbis-bounces@ietf.org"><span style=3D"color:#954F72">bfc=
pbis-bounces@ietf.org</span></a>&gt;
 on behalf of Christer Holmberg &lt;<a href=3D"mailto:christer.holmberg@eri=
csson.com"><span style=3D"color:#954F72">christer.holmberg@ericsson.com</sp=
an></a>&gt;<br>
<b>Date:<span class=3D"apple-converted-space">&nbsp;</span></b>Monday, Marc=
h 26, 2018 at 12:14 AM<br>
<b>To:<span class=3D"apple-converted-space">&nbsp;</span></b>&quot;<a href=
=3D"mailto:bfcpbis@ietf.org"><span style=3D"color:#954F72">bfcpbis@ietf.org=
</span></a>&quot; &lt;<a href=3D"mailto:bfcpbis@ietf.org"><span style=3D"co=
lor:#954F72">bfcpbis@ietf.org</span></a>&gt;<br>
<b>Subject:<span class=3D"apple-converted-space">&nbsp;</span></b>[bfcpbis]=
 4583bis: SDP bfcpver attribute</span><span style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif"><o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><a name=3D"_MailOriginalBody"><span style=3D"font-si=
ze:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">Hi,</span></a><span s=
tyle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><o:p><=
/o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">I would like to clarify the usage of the SDP &#8216=
;bfcpver' attribute.<o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">According to the procedures, the attribute is only =
inserted by the floor control server. I double checked this in older versio=
ns of 4583bis. However, in the examples of older
 versions the attribute is included in an SDP answer, even if the answerer =
indicates that it will be floor control client.<o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">So, what is the correct way?<o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Regards,<o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Christer<o:p></o:p></span></p>
</div>
</div>
<div>
<div style=3D"margin-left:36.0pt">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">&nbsp;<o:p></o:p></span></p>
</div>
</div>
<div>
<pre style=3D"margin-left:36.0pt;font-variant-ligatures: normal;orphans: 2;=
widows: 2;word-wrap: break-word;white-space:pre-wrap">&nbsp;<o:p></o:p></pr=
e>
</div>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><span style=3D"font-size:9.0pt;font-family:&quot;Hel=
vetica&quot;,sans-serif">_______________________________________________<br=
>
bfcpbis mailing list<br>
<a href=3D"mailto:bfcpbis@ietf.org">bfcpbis@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/bfcpbis">https://www.ietf.=
org/mailman/listinfo/bfcpbis</a></span><o:p></o:p></p>
</div>
</blockquote>
</div>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
</div>
</div>
</body>
</html>

--_000_7594FB04B1934943A5C02806D1A2204B72EB0482ESESSMB109erics_--


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Date: Fri, 4 May 2018 09:33:16 +0100
Cc: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>, "bfcpbis@ietf.org" <bfcpbis@ietf.org>
Message-Id: <6FE02199-FF21-472A-8419-953F434343F2@gmail.com>
References: <60538334-75B5-4A93-8561-2CD2B7DC4295@cisco.com> <7C3C61AA-2849-4918-A86C-D62E1B60F223@ericsson.com> <A4E14607-64A0-4AD3-AFF5-6DA9569B0C90@gmail.com> <7594FB04B1934943A5C02806D1A2204B72EB0482@ESESSMB109.ericsson.se>
To: Christer Holmberg <christer.holmberg@ericsson.com>
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Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute
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Hi,

> On 4 May 2018, at 09:06, Christer Holmberg =
<christer.holmberg@ericsson.com> wrote:
>=20
> > Ultimately the bfcpver attribute is informational; we do not specify =
any algorithms. Endpoints will=20
> > decide what version to use based on what is shared and thus what is =
known about the peer=E2=80=99s capabilities.=20
> > But it would remove any ambiguity to have this explicitly stated by =
both ends.
> =20
> Regarding the algorithms, if the offerer indicates versions X, Y, Z, I =
think the answerer has to indicate a subset of those =E2=80=93 it the =
answerer does not support any of the versions it should not accept the =
BFCP establishment. Sure, we could allow the answerer to also include =
versions not included by the offerer, for endpoints must use versions =
that both endpoints have indicated support of.

We could specify that, but as you say, there is no harm in an endpoint =
presenting more - the one which is used must be mutually supported. But =
I have no problem adding that to the 13.2 list, in order words:

 o  MUST associate a 'bfcpver' attribute with the 'm=E2=80=99 line, =
containing a subset of the versions presented in the offer.

Regards,
Alan


--Apple-Mail=_33782F22-BA0D-488B-ACDA-34F9BE2F8DA5
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Hi,<div class=3D""><br class=3D""><div><blockquote =
type=3D"cite" class=3D""><div class=3D"">On 4 May 2018, at 09:06, =
Christer Holmberg &lt;<a href=3D"mailto:christer.holmberg@ericsson.com" =
class=3D"">christer.holmberg@ericsson.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; font-family: =
Helvetica; font-size: 12px; font-style: normal; font-variant-caps: =
normal; font-weight: normal; letter-spacing: normal; orphans: auto; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: =
0px;"><div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;" class=3D""><span =
style=3D"font-size: 12pt;" class=3D"">&gt; Ultimately the bfcpver =
attribute is informational; we do not specify any algorithms. Endpoints =
will</span>&nbsp;</div><div class=3D""><div style=3D"margin: 0cm 0cm =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">&gt; decide what version to use based on what is shared and =
thus what is known about the peer=E2=80=99s capabilities.<span =
class=3D"Apple-converted-space">&nbsp;</span><br class=3D"">&gt; But it =
would remove any ambiguity to have this explicitly stated by both =
ends.<o:p class=3D""></o:p></div></div><div class=3D""><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div><div =
style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">Regarding the algorithms, =
if the offerer indicates versions X, Y, Z, I think the answerer has to =
indicate a subset of those =E2=80=93 it the answerer does not support =
any of the versions it should not accept the BFCP establishment. Sure, =
we could allow the answerer to also include versions not included by the =
offerer, for endpoints must use versions that both endpoints have =
indicated support of.</span></div></div></div></div></blockquote><br =
class=3D""></div><div>We could specify that, but as you say, there is no =
harm in an endpoint presenting more - the one which is used must be =
mutually supported. But I have no problem adding that to the 13.2 list, =
in order words:</div></div><div><br class=3D""></div><div><pre =
class=3D"newpage" style=3D"font-size: 13.3333px; margin-top: 0px; =
margin-bottom: 0px; font-variant-ligatures: normal; orphans: 2; widows: =
2;"> o  MUST associate a 'bfcpver' attribute with the 'm=E2=80=99 line, =
containing a subset of the versions presented in the offer.</pre><div =
class=3D""><br =
class=3D""></div></div><div>Regards,</div><div>Alan</div><div><br =
class=3D""></div></body></html>=

--Apple-Mail=_33782F22-BA0D-488B-ACDA-34F9BE2F8DA5--


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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Alan Ford <alan.ford@gmail.com>
CC: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>, "bfcpbis@ietf.org" <bfcpbis@ietf.org>
Thread-Topic: [bfcpbis] 4583bis: SDP bfcpver attribute
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Date: Fri, 4 May 2018 11:01:35 +0000
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References: <60538334-75B5-4A93-8561-2CD2B7DC4295@cisco.com> <7C3C61AA-2849-4918-A86C-D62E1B60F223@ericsson.com> <A4E14607-64A0-4AD3-AFF5-6DA9569B0C90@gmail.com> <7594FB04B1934943A5C02806D1A2204B72EB0482@ESESSMB109.ericsson.se> <6FE02199-FF21-472A-8419-953F434343F2@gmail.com>
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Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute
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Hi,

I can go other way, so I=92d like to hear what others think.

Charles?

Regards,

Christer


From: Alan Ford <alan.ford@gmail.com<mailto:alan.ford@gmail.com>>
Date: Friday 4 May 2018 at 11:33
To: Christer Holmberg <christer.holmberg@ericsson.com<mailto:christer.holmb=
erg@ericsson.com>>
Cc: Charles Eckel <eckelcu@cisco.com<mailto:eckelcu@cisco.com>>, "bfcpbis@i=
etf.org<mailto:bfcpbis@ietf.org>" <bfcpbis@ietf.org<mailto:bfcpbis@ietf.org=
>>
Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute

Hi,

On 4 May 2018, at 09:06, Christer Holmberg <christer.holmberg@ericsson.com<=
mailto:christer.holmberg@ericsson.com>> wrote:

> Ultimately the bfcpver attribute is informational; we do not specify any =
algorithms. Endpoints will
> decide what version to use based on what is shared and thus what is known=
 about the peer=92s capabilities.
> But it would remove any ambiguity to have this explicitly stated by both =
ends.

Regarding the algorithms, if the offerer indicates versions X, Y, Z, I thin=
k the answerer has to indicate a subset of those =96 it the answerer does n=
ot support any of the versions it should not accept the BFCP establishment.=
 Sure, we could allow the answerer to also include versions not included by=
 the offerer, for endpoints must use versions that both endpoints have indi=
cated support of.

We could specify that, but as you say, there is no harm in an endpoint pres=
enting more - the one which is used must be mutually supported. But I have =
no problem adding that to the 13.2 list, in order words:


 o  MUST associate a 'bfcpver' attribute with the 'm=92 line, containing a =
subset of the versions presented in the offer.

Regards,
Alan


--_000_D71218B02F3C9christerholmbergericssoncom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div><br>
</div>
<div>Hi,</div>
<div><br>
</div>
<div>I can go other way, so I=92d like to hear what others think.</div>
<div><br>
</div>
<div>Charles?</div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>Christer</div>
<div><br>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>Alan Ford &lt;<a href=3D"mail=
to:alan.ford@gmail.com">alan.ford@gmail.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Friday 4 May 2018 at 11:33<br=
>
<span style=3D"font-weight:bold">To: </span>Christer Holmberg &lt;<a href=
=3D"mailto:christer.holmberg@ericsson.com">christer.holmberg@ericsson.com</=
a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>Charles Eckel &lt;<a href=3D"ma=
ilto:eckelcu@cisco.com">eckelcu@cisco.com</a>&gt;, &quot;<a href=3D"mailto:=
bfcpbis@ietf.org">bfcpbis@ietf.org</a>&quot; &lt;<a href=3D"mailto:bfcpbis@=
ietf.org">bfcpbis@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bfcpbis] 4583bis: SDP=
 bfcpver attribute<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space;" class=3D"">
Hi,
<div class=3D""><br class=3D"">
<div>
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On 4 May 2018, at 09:06, Christer Holmberg &lt;<a href=3D"m=
ailto:christer.holmberg@ericsson.com" class=3D"">christer.holmberg@ericsson=
.com</a>&gt; wrote:</div>
<br class=3D"Apple-interchange-newline">
<div class=3D"">
<div class=3D"WordSection1" style=3D"page: WordSection1; font-family: Helve=
tica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-=
weight: normal; letter-spacing: normal; orphans: auto; text-align: start; t=
ext-indent: 0px; text-transform: none; white-space: normal; widows: auto; w=
ord-spacing: 0px; -webkit-text-stroke-width: 0px;">
<div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 12pt;" class=3D"">&gt; Ultimately the bfcpver att=
ribute is informational; we do not specify any algorithms. Endpoints will</=
span>&nbsp;</div>
<div class=3D"">
<div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
&gt; decide what version to use based on what is shared and thus what is kn=
own about the peer=92s capabilities.<span class=3D"Apple-converted-space">&=
nbsp;</span><br class=3D"">
&gt; But it would remove any ambiguity to have this explicitly stated by bo=
th ends.<o:p class=3D""></o:p></div>
</div>
<div class=3D"">
<div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<o:p class=3D"">&nbsp;</o:p></div>
<div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" class=3D=
"">Regarding the algorithms, if the offerer indicates versions X, Y, Z, I t=
hink the answerer has to indicate a subset of those =96 it the answerer doe=
s not support any of the versions it should
 not accept the BFCP establishment. Sure, we could allow the answerer to al=
so include versions not included by the offerer, for endpoints must use ver=
sions that both endpoints have indicated support of.</span></div>
</div>
</div>
</div>
</blockquote>
<br class=3D"">
</div>
<div>We could specify that, but as you say, there is no harm in an endpoint=
 presenting more - the one which is used must be mutually supported. But I =
have no problem adding that to the 13.2 list, in order words:</div>
</div>
<div><br class=3D"">
</div>
<div>
<pre class=3D"newpage" style=3D"font-size: 13.3333px; margin-top: 0px; marg=
in-bottom: 0px; font-variant-ligatures: normal; orphans: 2; widows: 2;"> o =
 MUST associate a 'bfcpver' attribute with the 'm=92 line, containing a sub=
set of the versions presented in the offer.</pre>
<div class=3D""><br class=3D"">
</div>
</div>
<div>Regards,</div>
<div>Alan</div>
<div><br class=3D"">
</div>
</div>
</div>
</span>
</body>
</html>

--_000_D71218B02F3C9christerholmbergericssoncom_--


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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>, Alan Ford <alan.ford@gmail.com>
CC: "bfcpbis@ietf.org" <bfcpbis@ietf.org>, "Charles Eckel (eckelcu)" <eckelcu@cisco.com>
Thread-Topic: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
Thread-Index: AQHT46exKsH2DNnBKk64nshzQ5jiwQ==
Date: Fri, 4 May 2018 12:59:11 +0000
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Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
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--_000_D71234232F3DAchristerholmbergericssoncom_
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Hi,

I have created a pull request based on Alan=92s suggestion:

https://github.com/cdh4u/draft-bfcp-4583bis/pull/7

Regards,

Christer


From: bfcpbis <bfcpbis-bounces@ietf.org<mailto:bfcpbis-bounces@ietf.org>> o=
n behalf of Christer Holmberg <christer.holmberg@ericsson.com<mailto:christ=
er.holmberg@ericsson.com>>
Date: Friday 4 May 2018 at 14:01
To: Alan Ford <alan.ford@gmail.com<mailto:alan.ford@gmail.com>>
Cc: "bfcpbis@ietf.org<mailto:bfcpbis@ietf.org>" <bfcpbis@ietf.org<mailto:bf=
cpbis@ietf.org>>, Charles Eckel <eckelcu@cisco.com<mailto:eckelcu@cisco.com=
>>
Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute


Hi,

I can go other way, so I=92d like to hear what others think.

Charles?

Regards,

Christer


From: Alan Ford <alan.ford@gmail.com<mailto:alan.ford@gmail.com>>
Date: Friday 4 May 2018 at 11:33
To: Christer Holmberg <christer.holmberg@ericsson.com<mailto:christer.holmb=
erg@ericsson.com>>
Cc: Charles Eckel <eckelcu@cisco.com<mailto:eckelcu@cisco.com>>, "bfcpbis@i=
etf.org<mailto:bfcpbis@ietf.org>" <bfcpbis@ietf.org<mailto:bfcpbis@ietf.org=
>>
Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute

Hi,

On 4 May 2018, at 09:06, Christer Holmberg <christer.holmberg@ericsson..com=
<mailto:christer.holmberg@ericsson.com>> wrote:

> Ultimately the bfcpver attribute is informational; we do not specify any =
algorithms. Endpoints will
> decide what version to use based on what is shared and thus what is known=
 about the peer=92s capabilities.
> But it would remove any ambiguity to have this explicitly stated by both =
ends.

Regarding the algorithms, if the offerer indicates versions X, Y, Z, I thin=
k the answerer has to indicate a subset of those =96 it the answerer does n=
ot support any of the versions it should not accept the BFCP establishment.=
 Sure, we could allow the answerer to also include versions not included by=
 the offerer, for endpoints must use versions that both endpoints have indi=
cated support of.

We could specify that, but as you say, there is no harm in an endpoint pres=
enting more - the one which is used must be mutually supported. But I have =
no problem adding that to the 13.2 list, in order words:


 o  MUST associate a 'bfcpver' attribute with the 'm=92 line, containing a =
subset of the versions presented in the offer.

Regards,
Alan


--_000_D71234232F3DAchristerholmbergericssoncom_
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<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3DWindows-1=
252">
</head>
<body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-lin=
e-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-fami=
ly: Calibri, sans-serif;">
<div>Hi,</div>
<div><br>
</div>
<div>I have created a pull request based on Alan=92s suggestion:</div>
<div><br>
</div>
<div><a href=3D"https://github.com/cdh4u/draft-bfcp-4583bis/pull/7">https:/=
/github.com/cdh4u/draft-bfcp-4583bis/pull/7</a></div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>Christer</div>
<div><br>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>bfcpbis &lt;<a href=3D"mailto=
:bfcpbis-bounces@ietf.org">bfcpbis-bounces@ietf.org</a>&gt; on behalf of Ch=
rister Holmberg &lt;<a href=3D"mailto:christer.holmberg@ericsson.com">chris=
ter.holmberg@ericsson.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Friday 4 May 2018 at 14:01<br=
>
<span style=3D"font-weight:bold">To: </span>Alan Ford &lt;<a href=3D"mailto=
:alan.ford@gmail.com">alan.ford@gmail.com</a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>&quot;<a href=3D"mailto:bfcpbis=
@ietf.org">bfcpbis@ietf.org</a>&quot; &lt;<a href=3D"mailto:bfcpbis@ietf.or=
g">bfcpbis@ietf.org</a>&gt;, Charles Eckel &lt;<a href=3D"mailto:eckelcu@ci=
sco.com">eckelcu@cisco.com</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bfcpbis] 4583bis: SDP=
 bfcpver attribute<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-famil=
y: Calibri, sans-serif;">
<div><br>
</div>
<div>Hi,</div>
<div><br>
</div>
<div>I can go other way, so I=92d like to hear what others think.</div>
<div><br>
</div>
<div>Charles?</div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>Christer</div>
<div><br>
</div>
<div><br>
</div>
<span id=3D"OLK_SRC_BODY_SECTION">
<div style=3D"font-family:Calibri; font-size:11pt; text-align:left; color:b=
lack; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM:=
 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid;=
 BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<span style=3D"font-weight:bold">From: </span>Alan Ford &lt;<a href=3D"mail=
to:alan.ford@gmail.com">alan.ford@gmail.com</a>&gt;<br>
<span style=3D"font-weight:bold">Date: </span>Friday 4 May 2018 at 11:33<br=
>
<span style=3D"font-weight:bold">To: </span>Christer Holmberg &lt;<a href=
=3D"mailto:christer.holmberg@ericsson.com">christer.holmberg@ericsson.com</=
a>&gt;<br>
<span style=3D"font-weight:bold">Cc: </span>Charles Eckel &lt;<a href=3D"ma=
ilto:eckelcu@cisco.com">eckelcu@cisco.com</a>&gt;, &quot;<a href=3D"mailto:=
bfcpbis@ietf.org">bfcpbis@ietf.org</a>&quot; &lt;<a href=3D"mailto:bfcpbis@=
ietf.org">bfcpbis@ietf.org</a>&gt;<br>
<span style=3D"font-weight:bold">Subject: </span>Re: [bfcpbis] 4583bis: SDP=
 bfcpver attribute<br>
</div>
<div><br>
</div>
<div>
<div style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line=
-break: after-white-space;" class=3D"">
Hi,
<div class=3D""><br class=3D"">
<div>
<blockquote type=3D"cite" class=3D"">
<div class=3D"">On 4 May 2018, at 09:06, Christer Holmberg &lt;<a href=3D"m=
ailto:christer.holmberg@ericsson.com" class=3D"">christer.holmberg@ericsson=
..com</a>&gt; wrote:</div>
<br class=3D"Apple-interchange-newline">
<div class=3D"">
<div class=3D"WordSection1" style=3D"page: WordSection1; font-family: Helve=
tica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-=
weight: normal; letter-spacing: normal; orphans: auto; text-align: start; t=
ext-indent: 0px; text-transform: none; white-space: normal; widows: auto; w=
ord-spacing: 0px; -webkit-text-stroke-width: 0px;">
<div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 12pt;" class=3D"">&gt; Ultimately the bfcpver att=
ribute is informational; we do not specify any algorithms. Endpoints will</=
span>&nbsp;</div>
<div class=3D"">
<div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
&gt; decide what version to use based on what is shared and thus what is kn=
own about the peer=92s capabilities.<span class=3D"Apple-converted-space">&=
nbsp;</span><br class=3D"">
&gt; But it would remove any ambiguity to have this explicitly stated by bo=
th ends.<o:p class=3D""></o:p></div>
</div>
<div class=3D"">
<div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<o:p class=3D"">&nbsp;</o:p></div>
<div style=3D"margin: 0cm 0cm 0.0001pt; font-size: 12pt; font-family: 'Time=
s New Roman', serif;" class=3D"">
<span style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" class=3D=
"">Regarding the algorithms, if the offerer indicates versions X, Y, Z, I t=
hink the answerer has to indicate a subset of those =96 it the answerer doe=
s not support any of the versions it should
 not accept the BFCP establishment. Sure, we could allow the answerer to al=
so include versions not included by the offerer, for endpoints must use ver=
sions that both endpoints have indicated support of.</span></div>
</div>
</div>
</div>
</blockquote>
<br class=3D"">
</div>
<div>We could specify that, but as you say, there is no harm in an endpoint=
 presenting more - the one which is used must be mutually supported. But I =
have no problem adding that to the 13.2 list, in order words:</div>
</div>
<div><br class=3D"">
</div>
<div>
<pre class=3D"newpage" style=3D"font-size: 13.3333px; margin-top: 0px; marg=
in-bottom: 0px; font-variant-ligatures: normal; orphans: 2; widows: 2;"> o =
 MUST associate a 'bfcpver' attribute with the 'm=92 line, containing a sub=
set of the versions presented in the offer.</pre>
<div class=3D""><br class=3D"">
</div>
</div>
<div>Regards,</div>
<div>Alan</div>
<div><br class=3D"">
</div>
</div>
</div>
</span></div>
</div>
</span>
</body>
</html>

--_000_D71234232F3DAchristerholmbergericssoncom_--


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Thread-Topic: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
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Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
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From: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>, Alan Ford <alan.ford@gmail.com>
CC: "bfcpbis@ietf.org" <bfcpbis@ietf.org>
Thread-Topic: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
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Date: Fri, 4 May 2018 21:30:33 +0000
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Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
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To: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>, Alan Ford <alan.ford@gmail.com>
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Thread-Topic: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
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Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>, "Charles Eckel (eckelcu)" <eckelcu@cisco.com>, Alan Ford <alan.ford@gmail.com>
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Thread-Topic: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
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Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
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From: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>, Alan Ford <alan.ford@gmail.com>
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Thread-Topic: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
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Date: Fri, 4 May 2018 22:46:49 +0000
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Subject: Re: [bfcpbis] 4583bis: SDP bfcpver attribute - pull request
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From nobody Mon May 21 13:48:36 2018
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A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Binary Floor Control Protocol Bis WG of the IETF.

        Title           : Session Description Protocol (SDP) Format for Binary Floor Control Protocol (BFCP) Streams
        Authors         : Gonzalo Camarillo
                          Tom Kristensen
                          Christer Holmberg
	Filename        : draft-ietf-bfcpbis-rfc4583bis-23.txt
	Pages           : 23
	Date            : 2018-05-21

Abstract:
   This document defines the Session Description Protocol (SDP) offer/
   answer procedures for negotiating and establishing Binary Floor
   Control Protocol (BFCP) streams.

   This document obsoletes RFC 4583.  Changes from RFC 4583 are
   summarized in Section 15.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-bfcpbis-rfc4583bis/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-bfcpbis-rfc4583bis-23
https://datatracker.ietf.org/doc/html/draft-ietf-bfcpbis-rfc4583bis-23

A diff from the previous version is available at:
https://www.ietf.org/rfcdiff?url2=draft-ietf-bfcpbis-rfc4583bis-23


Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/


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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: "bfcpbis@ietf.org" <bfcpbis@ietf.org>, "bfcpbis-chairs@tools.ietf.org" <bfcpbis-chairs@tools.ietf.org>, Ben Campbell <ben@nostrum.com>
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--_000_7594FB04B1934943A5C02806D1A2204B72EFC4C7ESESSMB109erics_
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Hi,

I have submitted a new version (-23) of draft-4583bis.

The following pull request was merged and implemented in the new version:

https://github.com/cdh4u/draft-bfcp-4583bis/pull/7

Regards,

Christer

--_000_7594FB04B1934943A5C02806D1A2204B72EFC4C7ESESSMB109erics_
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<p class=3D"MsoNormal">Hi,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">I have submitted a new version (-23) of draft-4583bi=
s.<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">The following pull request was merged and implemente=
d in the new version:<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"><a href=3D"https://github.com/cdh4u/draft-bfcp-4583b=
is/pull/7">https://github.com/cdh4u/draft-bfcp-4583bis/pull/7</a><o:p></o:p=
></p>
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<p class=3D"MsoNormal">Regards,<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Christer<o:p></o:p></p>
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From: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>
To: "bfcpbis@ietf.org" <bfcpbis@ietf.org>
CC: "alan@pexip.com" <alan@pexip.com>, Roman Shpount <roman@telurix.com>, "Tom Kristensen (tomkrist)" <tomkrist@cisco.com>, Paul Kyzivat <pkyzivat@alum.mit.edu>, Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>
Thread-Topic: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
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From: Alan Ford <alan.ford@gmail.com>
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Date: Mon, 21 May 2018 22:55:53 +0100
Cc: "bfcpbis@ietf.org" <bfcpbis@ietf.org>, Paul Kyzivat <pkyzivat@alum.mit.edu>, Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>, Roman Shpount <roman@telurix.com>, "Tom Kristensen (tomkrist)" <tomkrist@cisco.com>
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To: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>
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Subject: Re: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
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Hi all,

So this is quite a significant change from 4583; the attributes confid, =
userid, floorid, and bfcpver have all changed from =E2=80=9Ctoken=E2=80=9D=
 to =E2=80=9CDIGIT=E2=80=9D. Only numeric values are now valid. In my =
opinion this seems fine, since the relevant fields in the protocol are =
defined as unsigned integers so in fact permitting tokens was not =
appropriate in the first place.

All these changes seem fine.

Regards,
Alan

> On 21 May 2018, at 22:04, Charles Eckel (eckelcu) <eckelcu@cisco.com> =
wrote:
>=20
> (As chair)
>=20
> Hi Folks,
>=20
> This version of the draft addresses comments provided by the SDP =
directorate review (thanks Paul).=20
> It includes changes to the ABNF and corresponding editorial =
clarifications. I realized only now that the working group was not =
included in the discussion of these changes. Please review closely and =
share your feedback with the list. Not much changed but it is critical =
that we got the changes right.
>=20
> Thanks,
> Charles
>=20
>=20
> =EF=BB=BF-----Original Message-----
> From: bfcpbis <bfcpbis-bounces@ietf.org> on behalf of =
"internet-drafts@ietf.org" <internet-drafts@ietf.org>
> Date: Monday, May 21, 2018 at 1:48 PM
> To: "i-d-announce@ietf.org" <i-d-announce@ietf.org>
> Cc: "bfcpbis@ietf.org" <bfcpbis@ietf.org>
> Subject: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
>=20
>=20
>    A New Internet-Draft is available from the on-line Internet-Drafts =
directories.
>    This draft is a work item of the Binary Floor Control Protocol Bis =
WG of the IETF.
>=20
>            Title           : Session Description Protocol (SDP) Format =
for Binary Floor Control Protocol (BFCP) Streams
>            Authors         : Gonzalo Camarillo
>                              Tom Kristensen
>                              Christer Holmberg
>    	Filename        : draft-ietf-bfcpbis-rfc4583bis-23.txt
>    	Pages           : 23
>    	Date            : 2018-05-21
>=20
>    Abstract:
>       This document defines the Session Description Protocol (SDP) =
offer/
>       answer procedures for negotiating and establishing Binary Floor
>       Control Protocol (BFCP) streams.
>=20
>       This document obsoletes RFC 4583.  Changes from RFC 4583 are
>       summarized in Section 15.
>=20
>=20
>    The IETF datatracker status page for this draft is:
>    https://datatracker.ietf.org/doc/draft-ietf-bfcpbis-rfc4583bis/
>=20
>    There are also htmlized versions available at:
>    https://tools.ietf.org/html/draft-ietf-bfcpbis-rfc4583bis-23
>    =
https://datatracker.ietf.org/doc/html/draft-ietf-bfcpbis-rfc4583bis-23
>=20
>    A diff from the previous version is available at:
>    https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-bfcpbis-rfc4583bis-23
>=20
>=20
>    Please note that it may take a couple of minutes from the time of =
submission
>    until the htmlized version and diff are available at =
tools.ietf.org.
>=20
>    Internet-Drafts are also available by anonymous FTP at:
>    ftp://ftp.ietf.org/internet-drafts/
>=20
>    _______________________________________________
>    bfcpbis mailing list
>    bfcpbis@ietf.org
>    https://www.ietf.org/mailman/listinfo/bfcpbis
>=20
>=20
> _______________________________________________
> bfcpbis mailing list
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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Alan Ford <alan.ford@gmail.com>, "Charles Eckel (eckelcu)" <eckelcu@cisco.com>
CC: Roman Shpount <roman@telurix.com>, "bfcpbis@ietf.org" <bfcpbis@ietf.org>,  Gonzalo Camarillo <gonzalo.camarillo@ericsson.com>, Paul Kyzivat <pkyzivat@alum.mit.edu>, "Tom Kristensen (tomkrist)" <tomkrist@cisco.com>
Thread-Topic: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
Thread-Index: AQHT8UUZ1pLEymKVsEimEUKtCs2PZKQ6in2AgAAOa4CABCzqwA==
Date: Thu, 24 May 2018 11:42:07 +0000
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References: <152693571549.23828.5670441744617994813@ietfa.amsl.com> <CA29301E-BB20-49CB-A251-E298B01C3E5B@cisco.com> <4D5033D0-D132-4DEC-BB6F-3190BAE0B184@gmail.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bfcpbis/QMGogvghQkt47Hl3UFlWHmLc4Bs>
Subject: Re: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
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From: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>
To: Christer Holmberg <christer.holmberg@ericsson.com>, Alan Ford <alan.ford@gmail.com>
CC: Roman Shpount <roman@telurix.com>, "bfcpbis@ietf.org" <bfcpbis@ietf.org>,  Gonzalo Camarillo <gonzalo.camarillo@ericsson.com>, Paul Kyzivat <pkyzivat@alum.mit.edu>, "Tom Kristensen (tomkrist)" <tomkrist@cisco.com>, Mary Barnes <mary.ietf.barnes@gmail.com>
Thread-Topic: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
Thread-Index: AQHT8UUZ1pLEymKVsEimEUKtCs2PZKQ6in2AgACDxICABAuCgIABUcoA
Date: Fri, 25 May 2018 14:51:07 +0000
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To: "Charles Eckel (eckelcu)" <eckelcu@cisco.com>, Christer Holmberg <christer.holmberg@ericsson.com>, Alan Ford <alan.ford@gmail.com>
CC: Roman Shpount <roman@telurix.com>, "bfcpbis@ietf.org" <bfcpbis@ietf.org>,  Paul Kyzivat <pkyzivat@alum.mit.edu>, "Tom Kristensen (tomkrist)" <tomkrist@cisco.com>, Mary Barnes <mary.ietf.barnes@gmail.com>
References: <152693571549.23828.5670441744617994813@ietfa.amsl.com> <CA29301E-BB20-49CB-A251-E298B01C3E5B@cisco.com> <4D5033D0-D132-4DEC-BB6F-3190BAE0B184@gmail.com> <7594FB04B1934943A5C02806D1A2204B72F04FC0@ESESSMB109.ericsson.se> <8314C25C-B7D0-48B2-BCBF-E037C0AE22D7@cisco.com>
From: Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/bfcpbis/vWRXGf58T2BJ56eAKQEW27lILl0>
Subject: Re: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
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X-List-Received-Date: Fri, 25 May 2018 16:01:41 -0000

Hi Charles,

I have already gotten back to Mary. Thanks!

Cheers,

Gonzalo

On 25/05/2018 4:51 PM, Charles Eckel (eckelcu) wrote:
> Hi Christer,
> 
> I agree that the draft is ready to move forward. Mary is the document shepherd and is working on the write-up. Last I checked, she was still waiting for confirmation from your co-authors that any and all appropriate IPR disclosures required for full conformance with the provisions of BCP 78 and BCP 79 have already been filed. Tom and Gonzalo, please get back to Mary on this as soon as possible.
> 
> Cheers,
> Charles
> 
> ﻿-----Original Message-----
> From: Christer Holmberg <christer.holmberg@ericsson.com>
> Date: Thursday, May 24, 2018 at 4:42 AM
> To: Alan Ford <alan.ford@gmail.com>, Charles Eckel <eckelcu@cisco.com>
> Cc: Roman Shpount <roman@telurix.com>, "bfcpbis@ietf.org" <bfcpbis@ietf.org>, Gonzalo Camarillo <gonzalo.camarillo@ericsson.com>, Paul Kyzivat <pkyzivat@alum.mit.edu>, Tom Kristensen <tomkrist@cisco.com>
> Subject: RE: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
> 
>     Thanks! So, I guess we can ship the document :)
>     
>     Regards,
>     
>     Christer
>     
>     -----Original Message-----
>     From: bfcpbis [mailto:bfcpbis-bounces@ietf.org] On Behalf Of Alan Ford
>     Sent: 21 May 2018 23:56
>     To: Charles Eckel (eckelcu) <eckelcu@cisco.com>
>     Cc: Roman Shpount <roman@telurix.com>; bfcpbis@ietf.org; Gonzalo Camarillo <gonzalo.camarillo@ericsson.com>; Paul Kyzivat <pkyzivat@alum.mit.edu>; Tom Kristensen (tomkrist) <tomkrist@cisco.com>
>     Subject: Re: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
>     
>     Hi all,
>     
>     So this is quite a significant change from 4583; the attributes confid, userid, floorid, and bfcpver have all changed from “token” to “DIGIT”. Only numeric values are now valid. In my opinion this seems fine, since the relevant fields in the protocol are defined as unsigned integers so in fact permitting tokens was not appropriate in the first place.
>     
>     All these changes seem fine.
>     
>     Regards,
>     Alan
>     
>     > On 21 May 2018, at 22:04, Charles Eckel (eckelcu) <eckelcu@cisco.com> wrote:
>     > 
>     > (As chair)
>     > 
>     > Hi Folks,
>     > 
>     > This version of the draft addresses comments provided by the SDP directorate review (thanks Paul). 
>     > It includes changes to the ABNF and corresponding editorial clarifications. I realized only now that the working group was not included in the discussion of these changes. Please review closely and share your feedback with the list. Not much changed but it is critical that we got the changes right.
>     > 
>     > Thanks,
>     > Charles
>     > 
>     > 
>     > -----Original Message-----
>     > From: bfcpbis <bfcpbis-bounces@ietf.org> on behalf of "internet-drafts@ietf.org" <internet-drafts@ietf.org>
>     > Date: Monday, May 21, 2018 at 1:48 PM
>     > To: "i-d-announce@ietf.org" <i-d-announce@ietf.org>
>     > Cc: "bfcpbis@ietf.org" <bfcpbis@ietf.org>
>     > Subject: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
>     > 
>     > 
>     >    A New Internet-Draft is available from the on-line Internet-Drafts directories.
>     >    This draft is a work item of the Binary Floor Control Protocol Bis WG of the IETF.
>     > 
>     >            Title           : Session Description Protocol (SDP) Format for Binary Floor Control Protocol (BFCP) Streams
>     >            Authors         : Gonzalo Camarillo
>     >                              Tom Kristensen
>     >                              Christer Holmberg
>     >    	Filename        : draft-ietf-bfcpbis-rfc4583bis-23.txt
>     >    	Pages           : 23
>     >    	Date            : 2018-05-21
>     > 
>     >    Abstract:
>     >       This document defines the Session Description Protocol (SDP) offer/
>     >       answer procedures for negotiating and establishing Binary Floor
>     >       Control Protocol (BFCP) streams.
>     > 
>     >       This document obsoletes RFC 4583.  Changes from RFC 4583 are
>     >       summarized in Section 15.
>     > 
>     > 
>     >    The IETF datatracker status page for this draft is:
>     >    https://datatracker.ietf.org/doc/draft-ietf-bfcpbis-rfc4583bis/
>     > 
>     >    There are also htmlized versions available at:
>     >    https://tools.ietf.org/html/draft-ietf-bfcpbis-rfc4583bis-23
>     >    https://datatracker.ietf.org/doc/html/draft-ietf-bfcpbis-rfc4583bis-23
>     > 
>     >    A diff from the previous version is available at:
>     >    https://www.ietf.org/rfcdiff?url2=draft-ietf-bfcpbis-rfc4583bis-23
>     > 
>     > 
>     >    Please note that it may take a couple of minutes from the time of submission
>     >    until the htmlized version and diff are available at tools.ietf.org.
>     > 
>     >    Internet-Drafts are also available by anonymous FTP at:
>     >    ftp://ftp.ietf.org/internet-drafts/
>     > 
>     >    _______________________________________________
>     >    bfcpbis mailing list
>     >    bfcpbis@ietf.org
>     >    https://www.ietf.org/mailman/listinfo/bfcpbis
>     > 
>     > 
>     > _______________________________________________
>     > bfcpbis mailing list
>     > bfcpbis@ietf.org
>     > https://www.ietf.org/mailman/listinfo/bfcpbis
>     
>     _______________________________________________
>     bfcpbis mailing list
>     bfcpbis@ietf.org
>     https://www.ietf.org/mailman/listinfo/bfcpbis
>     
> 


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Subject: [bfcpbis] bfcpbis - Not having a session at IETF 102
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Charles Eckel, a chair of the bfcpbis working group, indicated that the bfcpbis working group does not plan to hold a session at IETF 102.

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Gonzalo Camarillo <gonzalo.camarillo@ericsson.com>, "Charles Eckel (eckelcu)" <eckelcu@cisco.com>, Alan Ford <alan.ford@gmail.com>
CC: Roman Shpount <roman@telurix.com>, "bfcpbis@ietf.org" <bfcpbis@ietf.org>,  Paul Kyzivat <pkyzivat@alum.mit.edu>, "Tom Kristensen (tomkrist)" <tomkrist@cisco.com>, Mary Barnes <mary.ietf.barnes@gmail.com>
Thread-Topic: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
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Date: Thu, 31 May 2018 10:33:26 +0000
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References: <152693571549.23828.5670441744617994813@ietfa.amsl.com> <CA29301E-BB20-49CB-A251-E298B01C3E5B@cisco.com> <4D5033D0-D132-4DEC-BB6F-3190BAE0B184@gmail.com> <7594FB04B1934943A5C02806D1A2204B72F04FC0@ESESSMB109.ericsson.se> <8314C25C-B7D0-48B2-BCBF-E037C0AE22D7@cisco.com> <38ba10a4-ca32-59fe-b711-948946e0d8ba@ericsson.com>
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Subject: Re: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
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Mary?

On 25/05/18 19:01, "Gonzalo Camarillo" <gonzalo.camarillo@ericsson.com>
wrote:

>Hi Charles,
>
>I have already gotten back to Mary. Thanks!
>
>Cheers,
>
>Gonzalo
>
>On 25/05/2018 4:51 PM, Charles Eckel (eckelcu) wrote:
>> Hi Christer,
>>=20
>> I agree that the draft is ready to move forward. Mary is the document
>>shepherd and is working on the write-up. Last I checked, she was still
>>waiting for confirmation from your co-authors that any and all
>>appropriate IPR disclosures required for full conformance with the
>>provisions of BCP 78 and BCP 79 have already been filed. Tom and
>>Gonzalo, please get back to Mary on this as soon as possible.
>>=20
>> Cheers,
>> Charles
>>=20
>> -----Original Message-----
>> From: Christer Holmberg <christer.holmberg@ericsson.com>
>> Date: Thursday, May 24, 2018 at 4:42 AM
>> To: Alan Ford <alan.ford@gmail.com>, Charles Eckel <eckelcu@cisco.com>
>> Cc: Roman Shpount <roman@telurix.com>, "bfcpbis@ietf.org"
>><bfcpbis@ietf.org>, Gonzalo Camarillo <gonzalo.camarillo@ericsson.com>,
>>Paul Kyzivat <pkyzivat@alum.mit.edu>, Tom Kristensen <tomkrist@cisco.com>
>> Subject: RE: [bfcpbis] I-D Action: draft-ietf-bfcpbis-rfc4583bis-23.txt
>>=20
>>     Thanks! So, I guess we can ship the document :)
>>    =20
>>     Regards,
>>    =20
>>     Christer
>>    =20
>>     -----Original Message-----
>>     From: bfcpbis [mailto:bfcpbis-bounces@ietf.org] On Behalf Of Alan
>>Ford
>>     Sent: 21 May 2018 23:56
>>     To: Charles Eckel (eckelcu) <eckelcu@cisco.com>
>>     Cc: Roman Shpount <roman@telurix.com>; bfcpbis@ietf.org; Gonzalo
>>Camarillo <gonzalo.camarillo@ericsson.com>; Paul Kyzivat
>><pkyzivat@alum.mit.edu>; Tom Kristensen (tomkrist) <tomkrist@cisco.com>
>>     Subject: Re: [bfcpbis] I-D Action:
>>draft-ietf-bfcpbis-rfc4583bis-23.txt
>>    =20
>>     Hi all,
>>    =20
>>     So this is quite a significant change from 4583; the attributes
>>confid, userid, floorid, and bfcpver have all changed from =B3token=B2 to
>>=B3DIGIT=B2. Only numeric values are now valid. In my opinion this seems
>>fine, since the relevant fields in the protocol are defined as unsigned
>>integers so in fact permitting tokens was not appropriate in the first
>>place.
>>    =20
>>     All these changes seem fine.
>>    =20
>>     Regards,
>>     Alan
>>    =20
>>     > On 21 May 2018, at 22:04, Charles Eckel (eckelcu)
>><eckelcu@cisco.com> wrote:
>>     >=20
>>     > (As chair)
>>     >=20
>>     > Hi Folks,
>>     >=20
>>     > This version of the draft addresses comments provided by the SDP
>>directorate review (thanks Paul).
>>     > It includes changes to the ABNF and corresponding editorial
>>clarifications. I realized only now that the working group was not
>>included in the discussion of these changes. Please review closely and
>>share your feedback with the list. Not much changed but it is critical
>>that we got the changes right.
>>     >=20
>>     > Thanks,
>>     > Charles
>>     >=20
>>     >=20
>>     > -----Original Message-----
>>     > From: bfcpbis <bfcpbis-bounces@ietf.org> on behalf of
>>"internet-drafts@ietf.org" <internet-drafts@ietf.org>
>>     > Date: Monday, May 21, 2018 at 1:48 PM
>>     > To: "i-d-announce@ietf.org" <i-d-announce@ietf.org>
>>     > Cc: "bfcpbis@ietf.org" <bfcpbis@ietf.org>
>>     > Subject: [bfcpbis] I-D Action:
>>draft-ietf-bfcpbis-rfc4583bis-23.txt
>>     >=20
>>     >=20
>>     >    A New Internet-Draft is available from the on-line
>>Internet-Drafts directories.
>>     >    This draft is a work item of the Binary Floor Control Protocol
>>Bis WG of the IETF.
>>     >=20
>>     >            Title           : Session Description Protocol (SDP)
>>Format for Binary Floor Control Protocol (BFCP) Streams
>>     >            Authors         : Gonzalo Camarillo
>>     >                              Tom Kristensen
>>     >                              Christer Holmberg
>>     >    	Filename        : draft-ietf-bfcpbis-rfc4583bis-23.txt
>>     >    	Pages           : 23
>>     >    	Date            : 2018-05-21
>>     >=20
>>     >    Abstract:
>>     >       This document defines the Session Description Protocol
>>(SDP) offer/
>>     >       answer procedures for negotiating and establishing Binary
>>Floor
>>     >       Control Protocol (BFCP) streams.
>>     >=20
>>     >       This document obsoletes RFC 4583.  Changes from RFC 4583 are
>>     >       summarized in Section 15.
>>     >=20
>>     >=20
>>     >    The IETF datatracker status page for this draft is:
>>     >    https://datatracker.ietf.org/doc/draft-ietf-bfcpbis-rfc4583bis/
>>     >=20
>>     >    There are also htmlized versions available at:
>>     >    https://tools.ietf.org/html/draft-ietf-bfcpbis-rfc4583bis-23
>>     >   =20
>>https://datatracker.ietf.org/doc/html/draft-ietf-bfcpbis-rfc4583bis-23
>>     >=20
>>     >    A diff from the previous version is available at:
>>     >   =20
>>https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-bfcpbis-rfc4583bis-23
>>     >=20
>>     >=20
>>     >    Please note that it may take a couple of minutes from the time
>>of submission
>>     >    until the htmlized version and diff are available at
>>tools.ietf.org.
>>     >=20
>>     >    Internet-Drafts are also available by anonymous FTP at:
>>     >    ftp://ftp.ietf.org/internet-drafts/
>>     >=20
>>     >    _______________________________________________
>>     >    bfcpbis mailing list
>>     >    bfcpbis@ietf.org
>>     >    https://www.ietf.org/mailman/listinfo/bfcpbis
>>     >=20
>>     >=20
>>     > _______________________________________________
>>     > bfcpbis mailing list
>>     > bfcpbis@ietf.org
>>     > https://www.ietf.org/mailman/listinfo/bfcpbis
>>    =20
>>     _______________________________________________
>>     bfcpbis mailing list
>>     bfcpbis@ietf.org
>>     https://www.ietf.org/mailman/listinfo/bfcpbis
>>    =20
>>=20

