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Hi,
=20
In the current p2psip-base-26, all descriptions of storage_time check (e.g =
7.4.1.1 and 13.5.3) states that a Store request must satisfy condition:

    new_item->storage_time > existing_item->storage_time
=20
However, these two places have wordings to the contrary in terms of equalit=
y in the above comparison:
=20
Section 7. Data Storage Protocol
storage_time
  ... Any attempt to store a data value with a storage
 time before that of a value already stored at this location MUST
 generate a Error_Data_Too_Old error.=20
Section 6.3.3.1
Error_Data_Too_Old: A store cannot be completed because the
 storage_time precedes the existing value.
=20
The word "before" must be changed to "older than or equal to", and
the word "precedes" must be changed to "is older than or equal to".
=20
Thanks
=20
--Michael

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<div>Hi,</div>
<div>&nbsp;</div>
<div>In the current p2psip-base-26, all descriptions of storage_time check =
(e.g 7.4.1.1 and 13.5.3) states that a Store request must satisfy condition=
:<br /><br />&nbsp;&nbsp;&nbsp; new_item-&gt;storage_time &gt; existing_ite=
m-&gt;storage_time</div>
<div>&nbsp;</div>
<div>However, these two places have wordings to the contrary in terms of eq=
uality in the above comparison:</div>
<div>&nbsp;</div>
<div>Section 7. Data Storage Protocol</div>
<div>
<pre class=3D"newpage">   storage_time<br />     &nbsp;... Any attempt to s=
tore a data value with a storage
      time <strong>before</strong> that of a value already stored at this l=
ocation MUST
      generate a Error_Data_Too_Old error.</pre>
</div>
<div>Section 6.3.3.1</div>
<div>
<pre class=3D"newpage">   Error_Data_Too_Old:  A store cannot be completed =
because the
      storage_time <strong>precedes</strong> the existing value.
</pre>
</div>
<div>The word "before" must be changed to "older than or equal to", and</di=
v>
<div>the word "precedes" must be changed to "is older than or equal to".</d=
iv>
<div>&nbsp;</div>
<div>Thanks</div>
<div>&nbsp;</div>
<div>--Michael</div>

--=_445c695a7644d55efc64e24bac413d57--

From michaelc@idssoftware.com  Thu Jul  4 10:56:27 2013
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Hi,
=20
Background
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
In a SIP usage of RELOAD, a peer can store its AoR and certificate in a sin=
gle RELOAD Store Request with a SIP Registration kind and a Certificate By =
User kind. The data model for the SIP Registration is dictionary with its N=
ode-ID as key, and Certificate By User is array.
=20
P2PSIP Draft
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
In pspsip-base-26, section 11.3, bullet #5 says:
 o One or more Node-IDs ...
 ... The enrollment server
 SHOULD maintain a mapping of users to Node-IDs and if the same
 user returns (e.g., to have their certificate re-issued) return
 the same Node-IDs, thus avoiding the need for implementations to
 re-store all their data when their certificates expire.
=20
=20
Implementation
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
The enrollment server always returns a new Node-ID or keeps the above mappi=
ng for a short period compared to the expiration time of the certificate.
=20
Usage Scenario
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
A device goes in and out of the range of WiFi as it moves or sleeps then aw=
akes. Each time it loses the WiFi, RELOAD does not get the chance to proper=
ly Leave the overlay. Each time it gets the WiFi back, it rejoins the overl=
ay and receives a new Node-ID and thus a new certificate.
=20
Resource Leak
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Due to the data model (dictionary key off Node-ID) and array (Store by appe=
nding), the overlay holds on to more and more useless SIP Registration and =
Certificate By User at the Resource-ID (hash of the device's AoR).
=20
Possible Remedy 1
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
(p2psip-base) The enrollment server MUST maintain the same AoR to Node-ID m=
apping as long as the corresponding certificate is still valid. Con: expens=
ive enrollment server storage.
=20
Possible Remedy 2
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
(p2psip-sip and p2psip-base?) The joining peer MUST fetch and remove existi=
ng SIP Registration and Certificate By User at the Resource-ID before stori=
ng its current one. Con: peer-join complexity.
=20
Do I have a case?
=20
Thanks
=20
--Michael

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<div>Hi,</div>
<div>&nbsp;</div>
<div>Background</div>
<div>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
<div>In a SIP usage of RELOAD, a peer can store its AoR and certificate in =
a single RELOAD Store Request with a SIP Registration kind and a Certificat=
e By User kind. The data model for the SIP Registration is dictionary with =
its Node-ID as key, and Certificate By User is array.</div>
<div>&nbsp;</div>
<div>P2PSIP Draft</div>
<div>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
<div>In pspsip-base-26, section 11.3, bullet #5 says:<br />
<pre class=3D"newpage">   o  One or more Node-IDs ...
      ...  The enrollment server
      <strong>SHOULD</strong> maintain a mapping of users to Node-IDs and i=
f the same
      user returns (e.g., to have their certificate re-issued) return
      the same Node-IDs, thus avoiding the need for implementations to<br /=
>      re-store all their data when their certificates expire.
</pre>
</div>
<div>&nbsp;</div>
<div>Implementation</div>
<div>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
<div>The enrollment server always returns a new Node-ID or keeps the above =
mapping for a short period compared to the expiration time of the certifica=
te.</div>
<div>&nbsp;</div>
<div>Usage Scenario</div>
<div>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
<div>A device goes in and out of the range of WiFi as it moves or sleeps th=
en awakes. Each time it loses the WiFi, RELOAD does not get the chance to p=
roperly Leave the overlay. Each time it gets the WiFi back, it rejoins the =
overlay and receives a new Node-ID and thus a new certificate.</div>
<div>&nbsp;</div>
<div>Resource Leak</div>
<div>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
<div>Due to the data model (dictionary key off Node-ID) and array (Store by=
 appending), the overlay holds on to more and more useless SIP Registration=
 and Certificate By User at the Resource-ID (hash of the device's AoR).</di=
v>
<div>&nbsp;</div>
<div>Possible Remedy 1</div>
<div>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
<div>(p2psip-base) The enrollment server MUST maintain the same AoR to Node=
-ID mapping as long as the corresponding certificate is still valid. Con: e=
xpensive enrollment server storage.</div>
<div>&nbsp;</div>
<div>Possible Remedy 2</div>
<div>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</div>
<div>(p2psip-sip and p2psip-base?) The joining peer MUST fetch and remove e=
xisting SIP Registration and Certificate By User at the Resource-ID before =
storing its current one. Con: peer-join complexity.</div>
<div>&nbsp;</div>
<div>Do I have a case?</div>
<div>&nbsp;</div>
<div>Thanks</div>
<div>&nbsp;</div>
<div>--Michael</div>

--=_e740131120c60eb21b349ef9d4fb929c--

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Hi Michael,

=20

I agree with you that there is a hole when subsequent store requests =
have the same storage_time value.

But should every equality case be responded with a TOO-OLD error?

=20

If there is  only one writer to the data object, it seems like a =
repetition, and it makes sense to discard it like you said.

Whereas if there are more than one writers to the data object, I am not =
sure what is expected.=20

=20

Do we have to consider the multi-writer case?

=20

BR

Lingli

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: p2psip-bounces@ietf.org =
[mailto:p2psip-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Michael Chen
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2013=E5=B9=B47=E6=9C=885=E6=97=A5 =
1:52
=E6=94=B6=E4=BB=B6=E4=BA=BA: p2psip@ietf.org
=E4=B8=BB=E9=A2=98: [P2PSIP] storage_time check wording inconsistency

=20

Hi,

=20

In the current p2psip-base-26, all descriptions of storage_time check =
(e.g 7.4.1.1 and 13.5.3) states that a Store request must satisfy =
condition:

    new_item->storage_time > existing_item->storage_time

=20

However, these two places have wordings to the contrary in terms of =
equality in the above comparison:

=20

Section 7. Data Storage Protocol

   storage_time
      ... Any attempt to store a data value with a storage
      time before that of a value already stored at this location MUST
      generate a Error_Data_Too_Old error.

Section 6.3.3.1

   Error_Data_Too_Old:  A store cannot be completed because the
      storage_time precedes the existing value.

The word "before" must be changed to "older than or equal to", and

the word "precedes" must be changed to "is older than or equal to".

=20

Thanks

=20

--Michael


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lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi Michael,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I agree with you that there is a hole when subsequent store requests =
have the same storage_time value.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>But should every equality case be responded with a TOO-OLD =
error?<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>If there is=C2=A0 only one writer to the data object, it seems like a =
repetition, and it makes sense to discard it like you =
said.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Whereas if there are more than one writers to the data object, I am =
not sure what is expected. <o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Do we have to consider the multi-writer case?<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>BR<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Lingli<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt'> p2psip-bounces@ietf.org =
[mailto:p2psip-bounces@ietf.org] </span><b><span =
style=3D'font-size:10.0pt'>=E4=BB=A3=E8=A1=A8 </span></b><span =
lang=3DEN-US style=3D'font-size:10.0pt'>Michael Chen<br></span><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt'> 2013</span><span =
style=3D'font-size:10.0pt'>=E5=B9=B4<span =
lang=3DEN-US>7</span>=E6=9C=88<span lang=3DEN-US>5</span>=E6=97=A5<span =
lang=3DEN-US> 1:52<br></span><b>=E6=94=B6=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> =
p2psip@ietf.org<br></span><b>=E4=B8=BB=E9=A2=98<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> [P2PSIP] storage_time check =
wording inconsistency<o:p></o:p></span></span></p></div><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>Hi,<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>In the current p2psip-base-26, all =
descriptions of storage_time check (e.g 7.4.1.1 and 13.5.3) states that =
a Store request must satisfy condition:<br><br>&nbsp;&nbsp;&nbsp; =
new_item-&gt;storage_time &gt; =
existing_item-&gt;storage_time<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>However, these two places have =
wordings to the contrary in terms of equality in the above =
comparison:<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>Section 7. Data Storage =
Protocol<o:p></o:p></span></p></div><div><pre><span =
lang=3DEN-US>=C2=A0=C2=A0 storage_time<br>=C2=A0=C2=A0=C2=A0=C2=A0 =
&nbsp;... Any attempt to store a data value with a =
storage<o:p></o:p></span></pre><pre><span =
lang=3DEN-US>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 time <strong><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>before</span></strong> that of =
a value already stored at this location =
MUST<o:p></o:p></span></pre><pre><span =
lang=3DEN-US>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 generate a =
Error_Data_Too_Old error.<o:p></o:p></span></pre></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>Section =
6.3.3.1<o:p></o:p></span></p></div><div><pre><span =
lang=3DEN-US>=C2=A0=C2=A0 Error_Data_Too_Old:=C2=A0 A store cannot be =
completed because the<o:p></o:p></span></pre><pre><span =
lang=3DEN-US>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 storage_time <strong><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>precedes</span></strong> the =
existing value.<o:p></o:p></span></pre></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>The word &quot;before&quot; must be =
changed to &quot;older than or equal to&quot;, =
and<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>the word &quot;precedes&quot; must be changed to &quot;is =
older than or equal to&quot;.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>Thanks<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>--Michael<o:p></o:p></span></p></div></div></body></html>
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From: =?utf-8?B?6YKT54G16I6JL0xpbmdsaSBEZW5n?= <denglingli@chinamobile.com>
To: "'Michael Chen'" <michaelc@idssoftware.com>, <p2psip@ietf.org>
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Hi Michael,

=20

I don=E2=80=99t quite follow the case you described.

=20

Shouldn=E2=80=99t a well-behaved rejoining peer be using the still valid =
certificate in the first place?

Otherwise, it is easy to exploit this to launch a DoS attack against ES, =
which must be protected.

=20

BR

Lingli

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: p2psip-bounces@ietf.org =
[mailto:p2psip-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Michael Chen
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2013=E5=B9=B47=E6=9C=885=E6=97=A5 =
1:56
=E6=94=B6=E4=BB=B6=E4=BA=BA: p2psip@ietf.org
=E4=B8=BB=E9=A2=98: [P2PSIP] An overlay resource leak scenario

=20

Hi,

=20

Background

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

In a SIP usage of RELOAD, a peer can store its AoR and certificate in a =
single RELOAD Store Request with a SIP Registration kind and a =
Certificate By User kind. The data model for the SIP Registration is =
dictionary with its Node-ID as key, and Certificate By User is array.

=20

P2PSIP Draft

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

In pspsip-base-26, section 11.3, bullet #5 says:

   o  One or more Node-IDs ...
      ...  The enrollment server
      SHOULD maintain a mapping of users to Node-IDs and if the same
      user returns (e.g., to have their certificate re-issued) return
      the same Node-IDs, thus avoiding the need for implementations to
      re-store all their data when their certificates expire.

=20

Implementation

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

The enrollment server always returns a new Node-ID or keeps the above =
mapping for a short period compared to the expiration time of the =
certificate.

=20

Usage Scenario

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

A device goes in and out of the range of WiFi as it moves or sleeps then =
awakes. Each time it loses the WiFi, RELOAD does not get the chance to =
properly Leave the overlay. Each time it gets the WiFi back, it rejoins =
the overlay and receives a new Node-ID and thus a new certificate.

=20

Resource Leak

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

Due to the data model (dictionary key off Node-ID) and array (Store by =
appending), the overlay holds on to more and more useless SIP =
Registration and Certificate By User at the Resource-ID (hash of the =
device's AoR).

=20

Possible Remedy 1

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

(p2psip-base) The enrollment server MUST maintain the same AoR to =
Node-ID mapping as long as the corresponding certificate is still valid. =
Con: expensive enrollment server storage.

=20

Possible Remedy 2

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

(p2psip-sip and p2psip-base?) The joining peer MUST fetch and remove =
existing SIP Registration and Certificate By User at the Resource-ID =
before storing its current one. Con: peer-join complexity.

=20

Do I have a case?

=20

Thanks

=20

--Michael


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</o:shapelayout></xml><![endif]--></head><body lang=3DZH-CN link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi Michael,<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I don=E2=80=99t quite follow the case you =
described.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Shouldn=E2=80=99t a well-behaved rejoining peer be using the still =
valid certificate in the first place?<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Otherwise, it is easy to exploit this to launch a DoS attack against =
ES, which must be protected.<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>BR<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Lingli<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt'> p2psip-bounces@ietf.org =
[mailto:p2psip-bounces@ietf.org] </span><b><span =
style=3D'font-size:10.0pt'>=E4=BB=A3=E8=A1=A8 </span></b><span =
lang=3DEN-US style=3D'font-size:10.0pt'>Michael Chen<br></span><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt'> 2013</span><span =
style=3D'font-size:10.0pt'>=E5=B9=B4<span =
lang=3DEN-US>7</span>=E6=9C=88<span lang=3DEN-US>5</span>=E6=97=A5<span =
lang=3DEN-US> 1:56<br></span><b>=E6=94=B6=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> =
p2psip@ietf.org<br></span><b>=E4=B8=BB=E9=A2=98<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> [P2PSIP] An overlay =
resource leak scenario<o:p></o:p></span></span></p></div><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>Hi,<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>Background<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<o:p></o:p></span></p></div><d=
iv><p class=3DMsoNormal><span lang=3DEN-US>In a SIP usage of RELOAD, a =
peer can store its AoR and certificate in a single RELOAD Store Request =
with a SIP Registration kind and a Certificate By User kind. The data =
model for the SIP Registration is dictionary with its Node-ID as key, =
and Certificate By User is array.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>P2PSIP =
Draft<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<o:p></o:p></span></p></div=
><div><p class=3DMsoNormal><span lang=3DEN-US>In pspsip-base-26, section =
11.3, bullet #5 says:<o:p></o:p></span></p><pre><span =
lang=3DEN-US>=C2=A0=C2=A0 o=C2=A0 One or more Node-IDs =
...<o:p></o:p></span></pre><pre><span =
lang=3DEN-US>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 ...=C2=A0 The enrollment =
server<o:p></o:p></span></pre><pre><span =
lang=3DEN-US>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 <strong><span =
style=3D'font-family:=E5=AE=8B=E4=BD=93'>SHOULD</span></strong> maintain =
a mapping of users to Node-IDs and if the =
same<o:p></o:p></span></pre><pre><span =
lang=3DEN-US>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 user returns (e.g., to have =
their certificate re-issued) return<o:p></o:p></span></pre><pre><span =
lang=3DEN-US>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 the same Node-IDs, thus =
avoiding the need for implementations =
to<br>=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 re-store all their data when their =
certificates expire.<o:p></o:p></span></pre></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>Implementation<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<o:p></o:p></span></p=
></div><div><p class=3DMsoNormal><span lang=3DEN-US>The enrollment =
server always returns a new Node-ID or keeps the above mapping for a =
short period compared to the expiration time of the =
certificate.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>Usage =
Scenario<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<o:p></o:p></span></p=
></div><div><p class=3DMsoNormal><span lang=3DEN-US>A device goes in and =
out of the range of WiFi as it moves or sleeps then awakes. Each time it =
loses the WiFi, RELOAD does not get the chance to properly Leave the =
overlay. Each time it gets the WiFi back, it rejoins the overlay and =
receives a new Node-ID and thus a new =
certificate.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>Resource =
Leak<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<o:p></o:p></span></p=
></div><div><p class=3DMsoNormal><span lang=3DEN-US>Due to the data =
model (dictionary key off Node-ID) and array (Store by appending), the =
overlay holds on to more and more useless SIP Registration and =
Certificate By User at the Resource-ID (hash of the device's =
AoR).<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>Possible Remedy =
1<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<o:p></o:p><=
/span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>(p2psip-base) The enrollment server MUST maintain the same =
AoR to Node-ID mapping as long as the corresponding certificate is still =
valid. Con: expensive enrollment server =
storage.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>Possible Remedy =
2<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D<o:p></o:p><=
/span></p></div><div><p class=3DMsoNormal><span lang=3DEN-US>(p2psip-sip =
and p2psip-base?) The joining peer MUST fetch and remove existing SIP =
Registration and Certificate By User at the Resource-ID before storing =
its current one. Con: peer-join =
complexity.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>Do I have a =
case?<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>Thanks<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>--Michael<o:p></o:p></span></p></div></div></body></html>
------=_NextPart_000_022A_01CE794C.FCB37DA0--




From bbl@lowekamp.net  Fri Jul  5 10:23:01 2013
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Subject: Re: [P2PSIP] References to concepts draft in draft-ietf-p2psip-rpr and draft-ietf-p2psip-drr
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On the concepts draft refs, in -base we chose to redefine them in
http://tools.ietf.org/html/draft-ietf-p2psip-base-26#section-2 as it
didn't appear concepts was moving forward.  If -base doesn't include
the terminology etc now, may want to simply move the content into the
appropriate document.

Bruce

On Mon, Jun 17, 2013 at 7:46 AM, Gonzalo Camarillo
<Gonzalo.Camarillo@ericsson.com> wrote:
> Hi,
>
> both of these drafts (in the publication requested state) have
> informative references to the concepts draft:
>
> http://www.ietf.org/id/draft-ietf-p2psip-rpr-07.txt
> http://www.ietf.org/id/draft-ietf-p2psip-drr-07.txt
>
> Given that both draft state that they use the terminology defined in the
> concepts draft "extensively", shouldn't those references be normative?
> That is, downrefs.
>
> Also, what is the status of the concepts draft?
>
> http://tools.ietf.org/html/draft-ietf-p2psip-concepts-04
>
> Thanks,
>
> Gonzalo
> _______________________________________________
> P2PSIP mailing list
> P2PSIP@ietf.org
> https://www.ietf.org/mailman/listinfo/p2psip

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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

On 07/04/2013 03:57 PM, 邓灵莉/Lingli Deng wrote:
> Hi Michael,
> 
> 
> 
> I don’t quite follow the case you described.
> 
> 
> 
> Shouldn’t a well-behaved rejoining peer be using the still valid
> certificate in the first place?
> 
> Otherwise, it is easy to exploit this to launch a DoS attack against ES,
> which must be protected.

Yes, and a well written enrollment server would certainly rate limit the
number of certificates granted per user.

Another solution that was proposed during the meeting in Vancouver by EKR is
that the enrollment server generates a Node-ID using a hash (e.g. on the user
name) so the same Node-IDs are always allocated to the same user, which solves
the problem of certificate renewal and also helps RELOAD clients that cannot
persistently store their certificate.

> 
> 
> 
> BR
> 
> Lingli
> 
> 
> 
> *发件人:*p2psip-bounces@ietf.org [mailto:p2psip-bounces@ietf.org] *代表
> *Michael Chen *发送时间:*2013年7月5日1:56 *收件人:*p2psip@ietf.org *主题:*[P2PSIP] An
> overlay resource leak scenario
> 
> 
> 
> Hi,
> 
> 
> 
> Background
> 
> ==========
> 
> In a SIP usage of RELOAD, a peer can store its AoR and certificate in a
> single RELOAD Store Request with a SIP Registration kind and a Certificate
> By User kind. The data model for the SIP Registration is dictionary with
> its Node-ID as key, and Certificate By User is array.
> 
> 
> 
> P2PSIP Draft
> 
> ===========
> 
> In pspsip-base-26, section 11.3, bullet #5 says:
> 
> o  One or more Node-IDs ...
> 
> ...  The enrollment server
> 
> *SHOULD* maintain a mapping of users to Node-IDs and if the same
> 
> user returns (e.g., to have their certificate re-issued) return
> 
> the same Node-IDs, thus avoiding the need for implementations to re-store
> all their data when their certificates expire.
> 
> 
> 
> Implementation
> 
> =============
> 
> The enrollment server always returns a new Node-ID or keeps the above
> mapping for a short period compared to the expiration time of the
> certificate.
> 
> 
> 
> Usage Scenario
> 
> =============
> 
> A device goes in and out of the range of WiFi as it moves or sleeps then
> awakes. Each time it loses the WiFi, RELOAD does not get the chance to
> properly Leave the overlay. Each time it gets the WiFi back, it rejoins the
> overlay and receives a new Node-ID and thus a new certificate.
> 
> 
> 
> Resource Leak
> 
> =============
> 
> Due to the data model (dictionary key off Node-ID) and array (Store by 
> appending), the overlay holds on to more and more useless SIP Registration
> and Certificate By User at the Resource-ID (hash of the device's AoR).
> 
> 
> 
> Possible Remedy 1
> 
> ================
> 
> (p2psip-base) The enrollment server MUST maintain the same AoR to Node-ID 
> mapping as long as the corresponding certificate is still valid. Con:
> expensive enrollment server storage.
> 
> 
> 
> Possible Remedy 2
> 
> ================
> 
> (p2psip-sip and p2psip-base?) The joining peer MUST fetch and remove
> existing SIP Registration and Certificate By User at the Resource-ID before
> storing its current one. Con: peer-join complexity.
> 
> 
> 
> Do I have a case?
> 
> 
> 
> Thanks
> 
> 
> 
> --Michael
> 
> 
> 
> _______________________________________________ P2PSIP mailing list 
> P2PSIP@ietf.org https://www.ietf.org/mailman/listinfo/p2psip
> 


- -- 
Marc Petit-Huguenin
Email: marc@petit-huguenin.org
Blog: http://blog.marc.petit-huguenin.org
Profile: http://www.linkedin.com/in/petithug
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From michaelc@idssoftware.com  Sat Jul  6 12:42:07 2013
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Hi,
=20
In the current p2psip-base-26, the past paragraph of section 7.4.2.2:
=20
There is one subtle point about signature computation on arrays. If
 the storing node uses the append feature (where the
 index=3D0xffffffff), then the index in the StoredData that is returned
 will not match that used by the storing node, which would break the
 signature. In order to avoid this issue, the index value in the
 array is set to zero before the signature is computed. This implies
 that malicious storing nodes can reorder array entries without being
 detected.
=20
=20
is even more critical to Store requests, thus should not be in the descript=
ion of Fetch response. It should be moved to section "7.1 Data Signature Co=
mputation" and reiterated in section 7.4.1.1 and 7.4.2.2.
=20
A use case would be Certificate By User. Only the certificate owner can sig=
n the StoredDataValue, which often has the array index of 0xffffffff for ap=
pending. Since the responsible peer will change the array index, the above =
paragraph becomes critical to both signing and verification.
=20
Thanks
=20
--Michael

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<div>Hi,</div>
<div>&nbsp;</div>
<div>In the current p2psip-base-26, the past paragraph of section 7.4.2.2:<=
/div>
<div>&nbsp;</div>
<div>
<pre class=3D"newpage">   There is one subtle point about signature computa=
tion on arrays.  If
   the storing node uses the append feature (where the
   index=3D0xffffffff), then the index in the StoredData that is returned
   will not match that used by the storing node, which would break the
   signature.  In order to avoid this issue, the index value in the
   array is set to zero before the signature is computed.  This implies
   that malicious storing nodes can reorder array entries without being
   detected.
</pre>
</div>
<div>&nbsp;</div>
<div>is even more critical to Store requests, thus should not be in the des=
cription of Fetch response. It should be moved to section "7.1 Data Signatu=
re Computation" and reiterated in section 7.4.1.1 and 7.4.2.2.</div>
<div>&nbsp;</div>
<div>A use case would be Certificate By User. Only the certificate owner ca=
n sign the StoredDataValue, which often has the array index of 0xffffffff f=
or appending. Since the responsible peer will change the array index, the a=
bove paragraph becomes critical to both signing and verification.</div>
<div>&nbsp;</div>
<div>Thanks</div>
<div>&nbsp;</div>
<div>--Michael</div>

--=_11f08feaed5d49cbd39c21b6456676a0--

From michaelc@idssoftware.com  Sun Jul  7 07:26:27 2013
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Date: Sun, 07 Jul 2013 07:26:19 -0700
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Subject: [P2PSIP] No such thing as "the hash function for the overlay".
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Hi
=20
In the current p2psip-base-26, section 7.3.1, 7.3.2, 7.3.3, 7.3.4 and 13.5=
=2E1, all refers to "the hash function for the overlay". For example,
=20
In the USER-MATCH policy, a given value MUST be written (or
 overwritten) if and only if the signer's certificate has a user name
 which hashes (using the hash function for the overlay) to the
 Resource-ID for the resource. Recall that the certificate may,
 depending on the overlay configuration, be self-signed.
=20
=20
However, there is no such hash function defined in the configuration XML, e=
xcept the <self-signed-permitted> tag's "digest" attribute. The <self-signe=
d-permitted> tag does not exist for enrolled overlay configuration.
=20
While the RELOAD signature dynamically specifies the hash function in used,=
 we need an explicit hash function contract for other usage like computing =
the Resource-ID from the SIP AoR.
=20
I propose moving the "digest" attribute out of <self-signed-permitted> tag =
and into the top level <configuration> tag, alongside "instance-name", etc=
=2E, or adding a new attribute to that effect.
=20
Thanks
=20
--Michael

--=_93887a2e86a6ca8e342f532c4c14b2b8
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<div>Hi</div>
<div>&nbsp;</div>
<div>In the current p2psip-base-26, section 7.3.1, 7.3.2, 7.3.3, 7.3.4 and =
13.5.1, all refers to "the hash function for the overlay". For example,</di=
v>
<div>&nbsp;</div>
<div>
<pre class=3D"newpage">   In the USER-MATCH policy, a given value MUST be w=
ritten (or
   overwritten) if and only if the signer's certificate has a user name
   which hashes (using <strong>the hash function for the overlay</strong>) =
to the
   Resource-ID for the resource.  Recall that the certificate may,
   depending on the overlay configuration, be self-signed.
</pre>
</div>
<div>&nbsp;</div>
<div>However, there is no such hash function defined in the configuration X=
ML, except the &lt;self-signed-permitted&gt; tag's "digest" attribute. The =
&lt;self-signed-permitted&gt; tag does not exist for enrolled overlay confi=
guration.</div>
<div>&nbsp;</div>
<div>While the RELOAD signature dynamically specifies the hash function in =
used, we need an explicit hash function contract for other usage like compu=
ting the Resource-ID from the SIP AoR.</div>
<div>&nbsp;</div>
<div>I propose moving the "digest" attribute out of &lt;self-signed-permitt=
ed&gt; tag and into the top level &lt;configuration&gt; tag, alongside "ins=
tance-name", etc., or adding a new attribute to that effect.</div>
<div>&nbsp;</div>
<div>Thanks</div>
<div>&nbsp;</div>
<div>--Michael</div>

--=_93887a2e86a6ca8e342f532c4c14b2b8--

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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Hi Michael,

On 07/07/2013 07:26 AM, Michael Chen wrote:
> Hi
> 
> In the current p2psip-base-26, section 7.3.1, 7.3.2, 7.3.3, 7.3.4 and
> 13.5.1, all refers to "the hash function for the overlay". For example,
> 
> 
> In the USER-MATCH policy, a given value MUST be written (or overwritten) if
> and only if the signer's certificate has a user name which hashes (using
> *the hash function for the overlay*) to the Resource-ID for the resource.
> Recall that the certificate may, depending on the overlay configuration, be
> self-signed.
> 
> 
> However, there is no such hash function defined in the configuration XML,
> except the <self-signed-permitted> tag's "digest" attribute. The 
> <self-signed-permitted> tag does not exist for enrolled overlay
> configuration.

The hash function is indirectly defined by the <topology-plugin> element.
When it is set to CHORD-OVERLAY (or if the element is not present), then the
hash definition is the one in 10.2.

> 
> While the RELOAD signature dynamically specifies the hash function in used,
> we need an explicit hash function contract for other usage like computing
> the Resource-ID from the SIP AoR.
> 
> I propose moving the "digest" attribute out of <self-signed-permitted> tag
> and into the top level <configuration> tag, alongside "instance-name",
> etc., or adding a new attribute to that effect.
> 

- -- 
Marc Petit-Huguenin
Email: marc@petit-huguenin.org
Blog: http://blog.marc.petit-huguenin.org
Profile: http://www.linkedin.com/in/petithug
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From michaelc@idssoftware.com  Sun Jul  7 08:34:02 2013
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Hi Lingli,
=20
"Writer" is a vague term. Section 7.3 Access Control describes validation a=
round the "signer" of the stored data. A storage data can be stored (or wri=
tten) by the signer and by the responsible peer as replica to its successor=
s.
=20
The problem is not as simple as it may seem. During replication, successors=
 will receive identical copies of the same StoredDataValue with a storage_t=
ime equals to the one it already has (previously received). Therefore, for =
replicas, storage_time equality is expected and must be allowed.
=20
This topic needs more discussions. Please add it to the Berlin agendas if n=
one of the principal authors are able to respond before then.
=20
Thanks
=20
--Michael
--------- Original Message --------- Subject: =E7=AD=94=E5=A4=8D: [P2PSIP] =
storage_time check wording inconsistency
From: "=E9=82=93=E7=81=B5=E8=8E=89/Lingli Deng" <denglingli@chinamobile.com=
>
Date: 7/4/13 3:46 pm
To: "'Michael Chen'" <michaelc@idssoftware.com>, p2psip@ietf.org

  Hi Michael,
 =20
 I agree with you that there is a hole when subsequent store requests have =
the same storage_time value.
 But should every equality case be responded with a TOO-OLD error?
 =20
 If there is  only one writer to the data object, it seems like a repetitio=
n, and it makes sense to discard it like you said.
 Whereas if there are more than one writers to the data object, I am not su=
re what is expected.=20
 =20
 Do we have to consider the multi-writer case?
 =20
 BR
 Lingli

--=_d02879f17c0d234bdd72f86accf4c216
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
 charset=utf-8

<div>Hi Lingli,</div>
<div>&nbsp;</div>
<div>"Writer" is a vague term. Section 7.3 Access Control describes validat=
ion around the "signer" of the stored data. A storage data can be stored (o=
r written) by the signer and by the responsible peer as replica to its succ=
essors.</div>
<div>&nbsp;</div>
<div>The problem is not as simple as it may seem. During replication, succe=
ssors will receive identical copies of the same StoredDataValue with a stor=
age_time equals to the one it already has (previously received). Therefore,=
 for replicas, storage_time equality is expected and must be allowed.</div>
<div>&nbsp;</div>
<div>This topic needs more discussions. Please add it to the Berlin agendas=
 if none of the principal authors are able to respond before then.</div>
<div>&nbsp;</div>
<div>Thanks</div>
<div>&nbsp;</div>
<div>--Michael</div>
<blockquote class=3D"threadBlockQuote" style=3D"border-left: 2px solid #C2C=
2C2; padding-left: 3px; margin-left: 4px;">--------- Original Message -----=
----
<div>Subject: =E7=AD=94=E5=A4=8D: [P2PSIP] storage_time check wording incon=
sistency<br />From: "=E9=82=93=E7=81=B5=E8=8E=89/Lingli Deng" &lt;denglingl=
i@chinamobile.com&gt;<br />Date: 7/4/13 3:46 pm<br />To: "'Michael Chen'" &=
lt;michaelc@idssoftware.com&gt;, p2psip@ietf.org<br /><br /><!--[if gte mso=
 9]><xml>
<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]-->
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">Hi Michael,</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">I agree with you that th=
ere is a hole when subsequent store requests have the same storage_time val=
ue.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">But should every equalit=
y case be responded with a TOO-OLD error?</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">If there is&nbsp; only o=
ne writer to the data object, it seems like a repetition, and it makes sens=
e to discard it like you said.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">Whereas if there are mor=
e than one writers to the data object, I am not sure what is expected. </sp=
an></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">Do we have to consider t=
he multi-writer case?</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">BR</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">Lingli</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US"><br /></span></p>
</div>
</div>
</blockquote>

--=_d02879f17c0d234bdd72f86accf4c216--

From michaelc@idssoftware.com  Sun Jul  7 08:51:47 2013
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--=_3d0b7ee60770e797c03b6d304c744a3d
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 charset=utf-8

Hi Lingli,
=20
A secure system cannot rely on "well-behaved" client. What if this is an at=
tack? A peer does nothing but register and store the new certificate.
=20
The enrollment server side limit mentioned by Marc is another possible coun=
ter measure, but I think Remedy #1 is better. If you're going to keep the s=
tate information for the limit, why not just keep the expiration date of th=
e certificate already issued. The server resource cause will be the same.
=20
EKR's suggestion will also work, if there is no security risk with known us=
er_name to Node-ID mapping.
=20
This topic needs more discussions. Please add it to the Berlin agendas if n=
one of the principal authors are able to respond before then.

=20
Thanks
=20
--Michael
--------- Original Message --------- Subject: =E7=AD=94=E5=A4=8D: [P2PSIP] =
An overlay resource leak scenario
From: "=E9=82=93=E7=81=B5=E8=8E=89/Lingli Deng" <denglingli@chinamobile.com=
>
Date: 7/4/13 3:57 pm
To: "'Michael Chen'" <michaelc@idssoftware.com>, p2psip@ietf.org

  Hi Michael,
 =20
 I don't quite follow the case you described.
 =20
 Shouldn't a well-behaved rejoining peer be using the still valid certifica=
te in the first place?
 Otherwise, it is easy to exploit this to launch a DoS attack against ES, w=
hich must be protected.
 =20
 BR
 Lingli

--=_3d0b7ee60770e797c03b6d304c744a3d
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html;
 charset=utf-8

<div>Hi Lingli,</div>
<div>&nbsp;</div>
<div>A secure system cannot rely on "well-behaved" client. What if this is =
an attack? A peer does nothing but register and store the new certificate=
=2E</div>
<div>&nbsp;</div>
<div>The enrollment server side limit mentioned by Marc is another possible=
 counter measure, but I think Remedy #1 is better. If you're going to keep =
the state information for the limit, why not just keep the expiration date =
of the certificate already issued. The server resource cause will be the sa=
me.</div>
<div>&nbsp;</div>
<div>EKR's suggestion will also work, if there is no security risk with kno=
wn user_name to Node-ID mapping.</div>
<div>&nbsp;</div>
<div>
<div>This topic needs more discussions. Please add it to the Berlin agendas=
 if none of the principal authors are able to respond before then.</div>
</div>
<div>&nbsp;</div>
<div>Thanks</div>
<div>&nbsp;</div>
<div>--Michael</div>
<blockquote class=3D"threadBlockQuote" style=3D"border-left: 2px solid #C2C=
2C2; padding-left: 3px; margin-left: 4px;">--------- Original Message -----=
----
<div>Subject: =E7=AD=94=E5=A4=8D: [P2PSIP] An overlay resource leak scenari=
o<br />From: "=E9=82=93=E7=81=B5=E8=8E=89/Lingli Deng" &lt;denglingli@china=
mobile.com&gt;<br />Date: 7/4/13 3:57 pm<br />To: "'Michael Chen'" &lt;mich=
aelc@idssoftware.com&gt;, p2psip@ietf.org<br /><br /><!--[if gte mso 9]><xm=
l>
<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]-->
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">Hi Michael,</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">I don&rsquo;t quite foll=
ow the case you described.</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">Shouldn&rsquo;t a well-b=
ehaved rejoining peer be using the still valid certificate in the first pla=
ce?</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">Otherwise, it is easy to=
 exploit this to launch a DoS attack against ES, which must be protected.</=
span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">&nbsp;</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">BR</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">Lingli</span></p>
<p class=3D"MsoNormal"><span style=3D"font-size: 10.5pt; font-family: 'Cali=
bri','sans-serif'; color: #1f497d;" lang=3D"EN-US">&nbsp;</span></p>
</div>
</div>
</blockquote>

--=_3d0b7ee60770e797c03b6d304c744a3d--

From denglingli@chinamobile.com  Sun Jul  7 19:17:40 2013
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From: =?UTF-8?B?6YKT54G16I6JL0xpbmdsaSBEZW5n?= <denglingli@chinamobile.com>
To: "'Marc Petit-Huguenin'" <petithug@acm.org>
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Subject: [P2PSIP] =?utf-8?b?562U5aSNOiAg562U5aSNOiAgQW4gb3ZlcmxheSByZXNv?= =?utf-8?q?urce_leak_scenario?=
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Yes, and a well written enrollment server would certainly rate limit the
number of certificates granted per user.

[dll] Agreed. It would be better if the problem is briefly discussed in =
the security considerations part of the base?

Another solution that was proposed during the meeting in Vancouver by =
EKR is
that the enrollment server generates a Node-ID using a hash (e.g. on the =
user
name) so the same Node-IDs are always allocated to the same user, which =
solves
the problem of certificate renewal and also helps RELOAD clients that =
cannot
persistently store their certificate.

[dll] It is an smart design. I think it would work for most cases. Where =
did you put it?
But since there is no collision-free hash function theoretically (i.e. =
the possibility from two user names mapping to a single Node-ID is small =
but not zero), it doesn=E2=80=99t wipe out the case that a peer's =
Node-ID could change after a certificate renewal.

BR
Lingli

-----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
=E5=8F=91=E4=BB=B6=E4=BA=BA: Marc Petit-Huguenin =
[mailto:petithug@acm.org]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2013=E5=B9=B47=E6=9C=886=E6=97=A5 =
1:47
=E6=94=B6=E4=BB=B6=E4=BA=BA: =E9=82=93=E7=81=B5=E8=8E=89/Lingli Deng
=E6=8A=84=E9=80=81: 'Michael Chen'; p2psip@ietf.org
=E4=B8=BB=E9=A2=98: Re: [P2PSIP] =E7=AD=94=E5=A4=8D: An overlay resource =
leak scenario

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

On 07/04/2013 03:57 PM, =E9=82=93=E7=81=B5=E8=8E=89/Lingli Deng wrote:
> Hi Michael,
>=20
>=20
>=20
> I don=E2=80=99t quite follow the case you described.
>=20
>=20
>=20
> Shouldn=E2=80=99t a well-behaved rejoining peer be using the still =
valid
> certificate in the first place?
>=20
> Otherwise, it is easy to exploit this to launch a DoS attack against =
ES,
> which must be protected.

Yes, and a well written enrollment server would certainly rate limit the
number of certificates granted per user.

Another solution that was proposed during the meeting in Vancouver by =
EKR is
that the enrollment server generates a Node-ID using a hash (e.g. on the =
user
name) so the same Node-IDs are always allocated to the same user, which =
solves
the problem of certificate renewal and also helps RELOAD clients that =
cannot
persistently store their certificate.

>=20
>=20
>=20
> BR
>=20
> Lingli
>=20
>=20
>=20
> *=E5=8F=91=E4=BB=B6=E4=BA=BA:*p2psip-bounces@ietf.org =
[mailto:p2psip-bounces@ietf.org] *=E4=BB=A3=E8=A1=A8
> *Michael Chen =
*=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4:*2013=E5=B9=B47=E6=9C=885=E6=97=A51=
:56 *=E6=94=B6=E4=BB=B6=E4=BA=BA:*p2psip@ietf.org =
*=E4=B8=BB=E9=A2=98:*[P2PSIP] An
> overlay resource leak scenario
>=20
>=20
>=20
> Hi,
>=20
>=20
>=20
> Background
>=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>=20
> In a SIP usage of RELOAD, a peer can store its AoR and certificate in =
a
> single RELOAD Store Request with a SIP Registration kind and a =
Certificate
> By User kind. The data model for the SIP Registration is dictionary =
with
> its Node-ID as key, and Certificate By User is array.
>=20
>=20
>=20
> P2PSIP Draft
>=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>=20
> In pspsip-base-26, section 11.3, bullet #5 says:
>=20
> o  One or more Node-IDs ...
>=20
> ...  The enrollment server
>=20
> *SHOULD* maintain a mapping of users to Node-IDs and if the same
>=20
> user returns (e.g., to have their certificate re-issued) return
>=20
> the same Node-IDs, thus avoiding the need for implementations to =
re-store
> all their data when their certificates expire.
>=20
>=20
>=20
> Implementation
>=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>=20
> The enrollment server always returns a new Node-ID or keeps the above
> mapping for a short period compared to the expiration time of the
> certificate.
>=20
>=20
>=20
> Usage Scenario
>=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>=20
> A device goes in and out of the range of WiFi as it moves or sleeps =
then
> awakes. Each time it loses the WiFi, RELOAD does not get the chance to
> properly Leave the overlay. Each time it gets the WiFi back, it =
rejoins the
> overlay and receives a new Node-ID and thus a new certificate.
>=20
>=20
>=20
> Resource Leak
>=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>=20
> Due to the data model (dictionary key off Node-ID) and array (Store by =

> appending), the overlay holds on to more and more useless SIP =
Registration
> and Certificate By User at the Resource-ID (hash of the device's AoR).
>=20
>=20
>=20
> Possible Remedy 1
>=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>=20
> (p2psip-base) The enrollment server MUST maintain the same AoR to =
Node-ID=20
> mapping as long as the corresponding certificate is still valid. Con:
> expensive enrollment server storage.
>=20
>=20
>=20
> Possible Remedy 2
>=20
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>=20
> (p2psip-sip and p2psip-base?) The joining peer MUST fetch and remove
> existing SIP Registration and Certificate By User at the Resource-ID =
before
> storing its current one. Con: peer-join complexity.
>=20
>=20
>=20
> Do I have a case?
>=20
>=20
>=20
> Thanks
>=20
>=20
>=20
> --Michael
>=20
>=20
>=20
> _______________________________________________ P2PSIP mailing list=20
> P2PSIP@ietf.org https://www.ietf.org/mailman/listinfo/p2psip
>=20


- --=20
Marc Petit-Huguenin
Email: marc@petit-huguenin.org
Blog: http://blog.marc.petit-huguenin.org
Profile: http://www.linkedin.com/in/petithug
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From: =?UTF-8?B?6YKT54G16I6JL0xpbmdsaSBEZW5n?= <denglingli@chinamobile.com>
To: "'Michael Chen'" <michaelc@idssoftware.com>, <p2psip@ietf.org>
References: <022901ce7909$ee903da0$cbb0b8e0$@com> <20130707085111.59ca11a9ba9389561a029f06442e67fa.2472c124d7.mailapi@email03.secureserver.net>
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I agree that we should have more discussion on this.

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: Michael Chen =
[mailto:michaelc@idssoftware.com]=20
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2013=E5=B9=B47=E6=9C=887=E6=97=A5 =
23:51
=E6=94=B6=E4=BB=B6=E4=BA=BA: =E9=82=93=E7=81=B5=E8=8E=89/Lingli Deng; =
p2psip@ietf.org
=E4=B8=BB=E9=A2=98: RE: [P2PSIP] An overlay resource leak scenario

=20

Hi Lingli,

=20

A secure system cannot rely on "well-behaved" client. What if this is an =
attack? A peer does nothing but register and store the new certificate.

=20

The enrollment server side limit mentioned by Marc is another possible =
counter measure, but I think Remedy #1 is better. If you're going to =
keep the state information for the limit, why not just keep the =
expiration date of the certificate already issued. The server resource =
cause will be the same.

=20

EKR's suggestion will also work, if there is no security risk with known =
user_name to Node-ID mapping.

=20

This topic needs more discussions. Please add it to the Berlin agendas =
if none of the principal authors are able to respond before then.

=20

Thanks

=20

--Michael

--------- Original Message ---------=20

Subject: =E7=AD=94=E5=A4=8D: [P2PSIP] An overlay resource leak scenario
From: "=E9=82=93=E7=81=B5=E8=8E=89/Lingli Deng" =
<denglingli@chinamobile.com>
Date: 7/4/13 3:57 pm
To: "'Michael Chen'" <michaelc@idssoftware.com>, p2psip@ietf.org

Hi Michael,

=20

I don=E2=80=99t quite follow the case you described.

=20

Shouldn=E2=80=99t a well-behaved rejoining peer be using the still valid =
certificate in the first place?

Otherwise, it is easy to exploit this to launch a DoS attack against ES, =
which must be protected.

=20

BR

Lingli

=20


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</o:shapelayout></xml><![endif]--></head><body lang=3DZH-CN link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I agree that we should have more discussion on =
this.<o:p></o:p></span></p><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt'> Michael Chen =
[mailto:michaelc@idssoftware.com] <br></span><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt'> 2013</span><span =
style=3D'font-size:10.0pt'>=E5=B9=B4<span =
lang=3DEN-US>7</span>=E6=9C=88<span lang=3DEN-US>7</span>=E6=97=A5<span =
lang=3DEN-US> 23:51<br></span><b>=E6=94=B6=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> =
</span>=E9=82=93=E7=81=B5=E8=8E=89<span lang=3DEN-US>/Lingli Deng; =
p2psip@ietf.org<br></span><b>=E4=B8=BB=E9=A2=98<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> RE: [P2PSIP] An overlay =
resource leak scenario<o:p></o:p></span></span></p></div><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div><p =
class=3DMsoNormal><span lang=3DEN-US>Hi =
Lingli,<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>A secure system cannot rely on =
&quot;well-behaved&quot; client. What if this is an attack? A peer does =
nothing but register and store the new =
certificate.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>The enrollment server side limit =
mentioned by Marc is another possible counter measure, but I think =
Remedy #1 is better. If you're going to keep the state information for =
the limit, why not just keep the expiration date of the certificate =
already issued. The server resource cause will be the =
same.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>EKR's suggestion will also work, if =
there is no security risk with known user_name to Node-ID =
mapping.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><div><p =
class=3DMsoNormal><span lang=3DEN-US>This topic needs more discussions. =
Please add it to the Berlin agendas if none of the principal authors are =
able to respond before then.<o:p></o:p></span></p></div></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>Thanks<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>--Michael<o:p></o:p></span></p></div><blockquote =
style=3D'border:none;border-left:solid #C2C2C2 1.5pt;padding:0cm 0cm 0cm =
2.0pt;margin-left:3.0pt;margin-top:5.0pt;margin-bottom:5.0pt'><p =
class=3DMsoNormal><span lang=3DEN-US>--------- Original Message =
--------- <o:p></o:p></span></p><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span lang=3DEN-US>Subject: =
</span>=E7=AD=94=E5=A4=8D<span lang=3DEN-US>: [P2PSIP] An overlay =
resource leak scenario<br>From: =
&quot;</span>=E9=82=93=E7=81=B5=E8=8E=89<span lang=3DEN-US>/Lingli =
Deng&quot; &lt;denglingli@chinamobile.com&gt;<br>Date: 7/4/13 3:57 =
pm<br>To: &quot;'Michael Chen'&quot; &lt;michaelc@idssoftware.com&gt;, =
p2psip@ietf.org<o:p></o:p></span></p><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Hi Michael,</span><span lang=3DEN-US><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span lang=3DEN-US><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>I don=E2=80=99t quite follow the case you described.</span><span =
lang=3DEN-US><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span lang=3DEN-US><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Shouldn=E2=80=99t a well-behaved rejoining peer be using the still =
valid certificate in the first place?</span><span =
lang=3DEN-US><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Otherwise, it is easy to exploit this to launch a DoS attack against =
ES, which must be protected.</span><span =
lang=3DEN-US><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span lang=3DEN-US><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>BR</span><span lang=3DEN-US><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Lingli</span><span lang=3DEN-US><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>&nbsp;</span><span =
lang=3DEN-US><o:p></o:p></span></p></div></div></blockquote></div></body>=
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To: "'Michael Chen'" <michaelc@idssoftware.com>, <p2psip@ietf.org>
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My question is since there is such obvious security threat here (that a =
malicious storing peer may reorder the array), why must a signing peer =
using this appending feature?

Is it OK to substitute the appending STORE request to a explicitly =
indexed array STRORE?

=20

=E5=8F=91=E4=BB=B6=E4=BA=BA: p2psip-bounces@ietf.org =
[mailto:p2psip-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Michael Chen
=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2013=E5=B9=B47=E6=9C=887=E6=97=A5 =
3:42
=E6=94=B6=E4=BB=B6=E4=BA=BA: p2psip@ietf.org
=E4=B8=BB=E9=A2=98: [P2PSIP] A badly placed critical paragraph

=20

Hi,

=20

In the current p2psip-base-26, the past paragraph of section 7.4.2.2:

=20

   There is one subtle point about signature computation on arrays.  If
   the storing node uses the append feature (where the
   index=3D0xffffffff), then the index in the StoredData that is =
returned
   will not match that used by the storing node, which would break the
   signature.  In order to avoid this issue, the index value in the
   array is set to zero before the signature is computed.  This implies
   that malicious storing nodes can reorder array entries without being
   detected.

=20

is even more critical to Store requests, thus should not be in the =
description of Fetch response. It should be moved to section "7.1 Data =
Signature Computation" and reiterated in section 7.4.1.1 and 7.4.2.2.

=20

A use case would be Certificate By User. Only the certificate owner can =
sign the StoredDataValue, which often has the array index of 0xffffffff =
for appending. Since the responsible peer will change the array index, =
the above paragraph becomes critical to both signing and verification.

=20

Thanks

=20

--Michael


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<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body lang=3DZH-CN link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>My question is since there is such obvious security threat here (that =
a malicious storing peer may reorder the array), why must a signing peer =
using this appending feature?<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'>Is it OK to substitute the appending STORE request to a explicitly =
indexed array STRORE?<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.5pt;font-family:"Calibri","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt'> p2psip-bounces@ietf.org =
[mailto:p2psip-bounces@ietf.org] </span><b><span =
style=3D'font-size:10.0pt'>=E4=BB=A3=E8=A1=A8 </span></b><span =
lang=3DEN-US style=3D'font-size:10.0pt'>Michael Chen<br></span><b><span =
style=3D'font-size:10.0pt'>=E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4<span =
lang=3DEN-US>:</span></span></b><span lang=3DEN-US =
style=3D'font-size:10.0pt'> 2013</span><span =
style=3D'font-size:10.0pt'>=E5=B9=B4<span =
lang=3DEN-US>7</span>=E6=9C=88<span lang=3DEN-US>7</span>=E6=97=A5<span =
lang=3DEN-US> 3:42<br></span><b>=E6=94=B6=E4=BB=B6=E4=BA=BA<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> =
p2psip@ietf.org<br></span><b>=E4=B8=BB=E9=A2=98<span =
lang=3DEN-US>:</span></b><span lang=3DEN-US> [P2PSIP] A badly placed =
critical paragraph<o:p></o:p></span></span></p></div><p =
class=3DMsoNormal><span lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>Hi,<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>In the current p2psip-base-26, the =
past paragraph of section 7.4.2.2:<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><pre><span =
lang=3DEN-US>=C2=A0=C2=A0 There is one subtle point about signature =
computation on arrays.=C2=A0 If<o:p></o:p></span></pre><pre><span =
lang=3DEN-US>=C2=A0=C2=A0 the storing node uses the append feature =
(where the<o:p></o:p></span></pre><pre><span lang=3DEN-US>=C2=A0=C2=A0 =
index=3D0xffffffff), then the index in the StoredData that is =
returned<o:p></o:p></span></pre><pre><span lang=3DEN-US>=C2=A0=C2=A0 =
will not match that used by the storing node, which would break =
the<o:p></o:p></span></pre><pre><span lang=3DEN-US>=C2=A0=C2=A0 =
signature.=C2=A0 In order to avoid this issue, the index value in =
the<o:p></o:p></span></pre><pre><span lang=3DEN-US>=C2=A0=C2=A0 array is =
set to zero before the signature is computed.=C2=A0 This =
implies<o:p></o:p></span></pre><pre><span lang=3DEN-US>=C2=A0=C2=A0 that =
malicious storing nodes can reorder array entries without =
being<o:p></o:p></span></pre><pre><span lang=3DEN-US>=C2=A0=C2=A0 =
detected.<o:p></o:p></span></pre></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>is even more critical to Store =
requests, thus should not be in the description of Fetch response. It =
should be moved to section &quot;7.1 Data Signature Computation&quot; =
and reiterated in section 7.4.1.1 and =
7.4.2.2.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US>A use case would be Certificate By =
User. Only the certificate owner can sign the StoredDataValue, which =
often has the array index of 0xffffffff for appending. Since the =
responsible peer will change the array index, the above paragraph =
becomes critical to both signing and =
verification.<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>Thanks<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span =
lang=3DEN-US>--Michael<o:p></o:p></span></p></div></div></body></html>
------=_NextPart_000_0030_01CE7BF8.4D544FC0--




From cjbc@it.uc3m.es  Mon Jul  8 06:28:18 2013
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From: Carlos =?ISO-8859-1?Q?Jes=FAs?= Bernardos Cano <cjbc@it.uc3m.es>
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Date: Mon, 08 Jul 2013 15:28:03 +0200
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Cc: p2psip-chairs@tools.ietf.org
Subject: [P2PSIP] Soliciting agenda items for IETF 87
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Hello,

The P2PSIP WG is scheduled to meet at IETF 87 on THURSDAY, August 1,
2013 from 1300-1500  (Afternoon Session I) at the Tiergarten 1/2 room.

If you need an agenda slot at the WG meeting, please send a request to
the chairs (p2psip-chairs@tools.ietf.org).

Please indicate:

1. Name of the I-D.
2. Relevance to the P2PSIP WG charter.
3. Amount of time needed.
4. Name of the presenter.

Thanks,

Chairs


From ron.even.tlv@gmail.com  Tue Jul  9 04:07:32 2013
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From: "Roni Even" <ron.even.tlv@gmail.com>
To: "'Gonzalo Camarillo'" <Gonzalo.Camarillo@ericsson.com>
References: <51BEFAC4.3050302@ericsson.com> <004b01ce7026$55930650$00b912f0$@gmail.com> <51C7FF29.9070901@ericsson.com> <008401ce70b8$fd5ff220$f81fd660$@gmail.com> <51C81A7C.7030404@ericsson.com>
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Date: Tue, 9 Jul 2013 14:05:46 +0300
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Cc: 'P2PSIP Mailing List' <p2psip@ietf.org>
Subject: Re: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
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Hi Gonzalo,
I will try to summarize what is the current recommendation in the document
and try to make  it clearer.

1. DRR is always available with a fall back to SRR. 
2. Section 6.2  of the base draft says " An overlay MAY be configured to use
alternative routing algorithms, and alternative routing algorithms
   MAY be selected on a per-message basis.  I.e., a node in an overlay
which supports SRR and some other routing algorithm called XXX might
   use SRR some of the time and XXX some of the time."  This is the
preferred way when trying to use DRR based on the overlay configuration and
having DRR as preferred mode.
3. The administrator when defining the configuration and not having enough
knowledge (this is not a managed / private network) about the usage of DRR
but still likes to try it may configure DRR. The sender may try using DRR
but fall back to SRR if fails as explained in section 6.4 of DRR draft.

4. section 4.2 provides guidance about how to decide of to continue using
DRR or just use SRR for all cases. Still the decision to try DRR in the
first place will be based on configuration.

5. We can add text that say that we discourage using DRR in the open
Internet or if the administrator does not feel he have enough information
about the overlay network topology.

6. The application should use the configuration to decide if to try DRR
before SRR and fall back to SRR if fails

7. using DRR  by a node is not recommended per specific connection. The
application should use DRR based on success rate and should give up DRR if
the success rate falls for all it connections. 

8. The  document will emphasis that the decision to continue with DRR is not
per a specific case but based on the node total success rate.

Roni

 

> -----Original Message-----
> From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
> Sent: 24 June, 2013 1:08 PM
> To: Roni Even
> Cc: 'P2PSIP Mailing List'
> Subject: Re: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
> 
> Hi Roni,
> 
> sure, the purpose of this document is not to create a new ICE type of
> mechanism, I agree. Nevertheless, the document needs to be clear about
> the options implementers and administrators have. That is, what is likely
to
> work, what is not likely to work, special cases (e.g., when two nodes are
in
> the same private address space), etc. That is the type of (brief)
discussion I
> would like to see in the draft. When it comes to the definition of the
> mechanisms themselves, I am OK with them as they are.
> 
> Thanks,
> 
> Gonzalo
> 
> On 24/06/2013 11:58 AM, Roni Even wrote:
> > Hi Gonzalo,
> > During the WG discussion we were asked to have in the main body just
> > the case of manage networks and leave in the informational appendix A
> > some informational text about finding routable addresses since it was
> > clear that there is no guarantee that it will work. I do not think
> > that it is the purpose of this document to discuss the whole topic of
> > finding routable addresses, we are just pointing at available options.
> > The idea is that there is always a fall back to SRR Roni
> >
> >> -----Original Message-----
> >> From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
> >> Sent: 24 June, 2013 11:11 AM
> >> To: Roni Even
> >> Cc: 'P2PSIP Mailing List'
> >> Subject: Re: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
> >>
> >> Hi Roni,
> >>
> >> I think the draft should discuss in more detail how a node makes the
> > decision
> >> of attempting to use DRR and what are the trade-offs. The case of
> >> closed
> > or
> >> managed networks is clear. The draft can mention that an
> >> administrator simply configures nodes to use DRR because the
> >> administrator knows, somehow, that it will work fine.
> >>
> >> In open networks, the draft should discuss the trial and error system
> > being
> >> proposed. For example, a node without a public IP address may be able
> >> to communicate directly with a node in the same non-public address
> space.
> >> That case is not covered by the discussions about UNSAF mechanisms.
> >> The whole point about developing ICE was that UNSAF mechanisms do
> not
> >> work in many situations.
> >>
> >> In short, this is an important interoperability issue because it
> >> relates
> > to when
> >> a node should use one mechanism or another. Therefore, the draft
> >> should discuss all the implications of the proposed mechanism
carefully.
> >>
> >> Thanks,
> >>
> >> Gonzalo
> >>
> >>
> >>
> >> On 23/06/2013 6:28 PM, Roni Even wrote:
> >>> Hi Gonzalo,
> >>> Thanks for point out to RFC3424.
> >>> How about adding to the following sentence an informative reference
> >>> to RFC3424. Note that appendix A is not creating an UNSAF proposal
> >>> but just mentions some methods for informational purpose.
> >>>
> >>> Suggest adding to "Note that there is no foolproof way to determine
> >>> if a peer is publically reachable, other than via out-of-band
> >>> mechanisms."  to
> >>>
> >>> "Note that there is no foolproof way to determine if a peer is
> >>> publically reachable, other than via out-of-band mechanisms. For
> >>> discussion about issues with address evaluation also see UNSAF
> > [RFC3424]"
> >>>
> >>> I am not sure if it adds much information but it may be good to have
> >>> this reference
> >>>
> >>> Roni Even
> >>>
> >>>> -----Original Message-----
> >>>> From: p2psip-bounces@ietf.org [mailto:p2psip-bounces@ietf.org] On
> >>>> Behalf Of Gonzalo Camarillo
> >>>> Sent: 17 June, 2013 3:02 PM
> >>>> To: P2PSIP Mailing List
> >>>> Subject: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
> >>>>
> >>>> Folks,
> >>>>
> >>>> Appendix A of the following draft describes how a node can obtain
> >>>> IP addresses on which it may be reached:
> >>>>
> >>>> http://tools.ietf.org/html/draft-ietf-p2psip-drr-07#appendix-A
> >>>>
> >>>> Have you taken into account the UNSAF considerations?
> >>>>
> >>>> http://tools.ietf.org/html/rfc3424
> >>>>
> >>>> Cheers,
> >>>>
> >>>> Gonzalo
> >>>> _______________________________________________
> >>>> P2PSIP mailing list
> >>>> P2PSIP@ietf.org
> >>>> https://www.ietf.org/mailman/listinfo/p2psip
> >>>
> >


From ron.even.tlv@gmail.com  Fri Jul 12 00:38:01 2013
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From: "Roni Even" <ron.even.tlv@gmail.com>
To: "'Gonzalo Camarillo'" <Gonzalo.Camarillo@ericsson.com>
References: <51BEFAC4.3050302@ericsson.com> <004b01ce7026$55930650$00b912f0$@gmail.com> <51C7FF29.9070901@ericsson.com> <008401ce70b8$fd5ff220$f81fd660$@gmail.com> <51C81A7C.7030404@ericsson.com> 
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Date: Fri, 12 Jul 2013 10:36:13 +0300
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Cc: 'P2PSIP Mailing List' <p2psip@ietf.org>
Subject: Re: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
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Hi,
After further review we will also add to the configuration document a new
element that will specify the usage of DRR or RPR.
I assume this is a bigger change and may require the WG to look at it
Roni

> -----Original Message-----
> From: Roni Even [mailto:ron.even.tlv@gmail.com]
> Sent: 09 July, 2013 2:06 PM
> To: 'Gonzalo Camarillo'
> Cc: 'P2PSIP Mailing List'
> Subject: RE: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
> 
> Hi Gonzalo,
> I will try to summarize what is the current recommendation in the document
> and try to make  it clearer.
> 
> 1. DRR is always available with a fall back to SRR.
> 2. Section 6.2  of the base draft says " An overlay MAY be configured to
use
> alternative routing algorithms, and alternative routing algorithms
>    MAY be selected on a per-message basis.  I.e., a node in an overlay
which
> supports SRR and some other routing algorithm called XXX might
>    use SRR some of the time and XXX some of the time."  This is the
preferred
> way when trying to use DRR based on the overlay configuration and having
> DRR as preferred mode.
> 3. The administrator when defining the configuration and not having enough
> knowledge (this is not a managed / private network) about the usage of DRR
> but still likes to try it may configure DRR. The sender may try using DRR
but
> fall back to SRR if fails as explained in section 6.4 of DRR draft.
> 
> 4. section 4.2 provides guidance about how to decide of to continue using
> DRR or just use SRR for all cases. Still the decision to try DRR in the
first place
> will be based on configuration.
> 
> 5. We can add text that say that we discourage using DRR in the open
> Internet or if the administrator does not feel he have enough information
> about the overlay network topology.
> 
> 6. The application should use the configuration to decide if to try DRR
before
> SRR and fall back to SRR if fails
> 
> 7. using DRR  by a node is not recommended per specific connection. The
> application should use DRR based on success rate and should give up DRR if
> the success rate falls for all it connections.
> 
> 8. The  document will emphasis that the decision to continue with DRR is
not
> per a specific case but based on the node total success rate.
> 
> Roni
> 
> 
> 
> > -----Original Message-----
> > From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
> > Sent: 24 June, 2013 1:08 PM
> > To: Roni Even
> > Cc: 'P2PSIP Mailing List'
> > Subject: Re: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
> >
> > Hi Roni,
> >
> > sure, the purpose of this document is not to create a new ICE type of
> > mechanism, I agree. Nevertheless, the document needs to be clear about
> > the options implementers and administrators have. That is, what is
> > likely to work, what is not likely to work, special cases (e.g., when
> > two nodes are in the same private address space), etc. That is the
> > type of (brief) discussion I would like to see in the draft. When it
> > comes to the definition of the mechanisms themselves, I am OK with them
> as they are.
> >
> > Thanks,
> >
> > Gonzalo
> >
> > On 24/06/2013 11:58 AM, Roni Even wrote:
> > > Hi Gonzalo,
> > > During the WG discussion we were asked to have in the main body just
> > > the case of manage networks and leave in the informational appendix
> > > A some informational text about finding routable addresses since it
> > > was clear that there is no guarantee that it will work. I do not
> > > think that it is the purpose of this document to discuss the whole
> > > topic of finding routable addresses, we are just pointing at available
> options.
> > > The idea is that there is always a fall back to SRR Roni
> > >
> > >> -----Original Message-----
> > >> From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
> > >> Sent: 24 June, 2013 11:11 AM
> > >> To: Roni Even
> > >> Cc: 'P2PSIP Mailing List'
> > >> Subject: Re: [P2PSIP] UNSAF considerations and
> > >> draft-ietf-p2psip-drr
> > >>
> > >> Hi Roni,
> > >>
> > >> I think the draft should discuss in more detail how a node makes
> > >> the
> > > decision
> > >> of attempting to use DRR and what are the trade-offs. The case of
> > >> closed
> > > or
> > >> managed networks is clear. The draft can mention that an
> > >> administrator simply configures nodes to use DRR because the
> > >> administrator knows, somehow, that it will work fine.
> > >>
> > >> In open networks, the draft should discuss the trial and error
> > >> system
> > > being
> > >> proposed. For example, a node without a public IP address may be
> > >> able to communicate directly with a node in the same non-public
> > >> address
> > space.
> > >> That case is not covered by the discussions about UNSAF mechanisms.
> > >> The whole point about developing ICE was that UNSAF mechanisms do
> > not
> > >> work in many situations.
> > >>
> > >> In short, this is an important interoperability issue because it
> > >> relates
> > > to when
> > >> a node should use one mechanism or another. Therefore, the draft
> > >> should discuss all the implications of the proposed mechanism
carefully.
> > >>
> > >> Thanks,
> > >>
> > >> Gonzalo
> > >>
> > >>
> > >>
> > >> On 23/06/2013 6:28 PM, Roni Even wrote:
> > >>> Hi Gonzalo,
> > >>> Thanks for point out to RFC3424.
> > >>> How about adding to the following sentence an informative
> > >>> reference to RFC3424. Note that appendix A is not creating an
> > >>> UNSAF proposal but just mentions some methods for informational
> purpose.
> > >>>
> > >>> Suggest adding to "Note that there is no foolproof way to
> > >>> determine if a peer is publically reachable, other than via
> > >>> out-of-band mechanisms."  to
> > >>>
> > >>> "Note that there is no foolproof way to determine if a peer is
> > >>> publically reachable, other than via out-of-band mechanisms. For
> > >>> discussion about issues with address evaluation also see UNSAF
> > > [RFC3424]"
> > >>>
> > >>> I am not sure if it adds much information but it may be good to
> > >>> have this reference
> > >>>
> > >>> Roni Even
> > >>>
> > >>>> -----Original Message-----
> > >>>> From: p2psip-bounces@ietf.org [mailto:p2psip-bounces@ietf.org]
> On
> > >>>> Behalf Of Gonzalo Camarillo
> > >>>> Sent: 17 June, 2013 3:02 PM
> > >>>> To: P2PSIP Mailing List
> > >>>> Subject: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
> > >>>>
> > >>>> Folks,
> > >>>>
> > >>>> Appendix A of the following draft describes how a node can obtain
> > >>>> IP addresses on which it may be reached:
> > >>>>
> > >>>> http://tools.ietf.org/html/draft-ietf-p2psip-drr-07#appendix-A
> > >>>>
> > >>>> Have you taken into account the UNSAF considerations?
> > >>>>
> > >>>> http://tools.ietf.org/html/rfc3424
> > >>>>
> > >>>> Cheers,
> > >>>>
> > >>>> Gonzalo
> > >>>> _______________________________________________
> > >>>> P2PSIP mailing list
> > >>>> P2PSIP@ietf.org
> > >>>> https://www.ietf.org/mailman/listinfo/p2psip
> > >>>
> > >


From gonzalo.camarillo@ericsson.com  Fri Jul 12 04:29:47 2013
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Date: Fri, 12 Jul 2013 14:29:37 +0300
From: Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>
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To: Roni Even <ron.even.tlv@gmail.com>
References: <51BEFAC4.3050302@ericsson.com> <004b01ce7026$55930650$00b912f0$@gmail.com> <51C7FF29.9070901@ericsson.com> <008401ce70b8$fd5ff220$f81fd660$@gmail.com> <51C81A7C.7030404@ericsson.com> <00c201ce7ed2$7da2b450$78e81cf0$@gmail.com>
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Cc: 'P2PSIP Mailing List' <p2psip@ietf.org>
Subject: Re: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
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X-List-Received-Date: Fri, 12 Jul 2013 11:29:47 -0000

Hi Roni,

sure, please go ahead work within the WG on this change and let me know
when the draft is ready.

Cheers,

Gonzalo

On 12/07/2013 10:36 AM, Roni Even wrote:
> Hi,
> After further review we will also add to the configuration document a new
> element that will specify the usage of DRR or RPR.
> I assume this is a bigger change and may require the WG to look at it
> Roni
> 
>> -----Original Message-----
>> From: Roni Even [mailto:ron.even.tlv@gmail.com]
>> Sent: 09 July, 2013 2:06 PM
>> To: 'Gonzalo Camarillo'
>> Cc: 'P2PSIP Mailing List'
>> Subject: RE: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
>>
>> Hi Gonzalo,
>> I will try to summarize what is the current recommendation in the document
>> and try to make  it clearer.
>>
>> 1. DRR is always available with a fall back to SRR.
>> 2. Section 6.2  of the base draft says " An overlay MAY be configured to
> use
>> alternative routing algorithms, and alternative routing algorithms
>>    MAY be selected on a per-message basis.  I.e., a node in an overlay
> which
>> supports SRR and some other routing algorithm called XXX might
>>    use SRR some of the time and XXX some of the time."  This is the
> preferred
>> way when trying to use DRR based on the overlay configuration and having
>> DRR as preferred mode.
>> 3. The administrator when defining the configuration and not having enough
>> knowledge (this is not a managed / private network) about the usage of DRR
>> but still likes to try it may configure DRR. The sender may try using DRR
> but
>> fall back to SRR if fails as explained in section 6.4 of DRR draft.
>>
>> 4. section 4.2 provides guidance about how to decide of to continue using
>> DRR or just use SRR for all cases. Still the decision to try DRR in the
> first place
>> will be based on configuration.
>>
>> 5. We can add text that say that we discourage using DRR in the open
>> Internet or if the administrator does not feel he have enough information
>> about the overlay network topology.
>>
>> 6. The application should use the configuration to decide if to try DRR
> before
>> SRR and fall back to SRR if fails
>>
>> 7. using DRR  by a node is not recommended per specific connection. The
>> application should use DRR based on success rate and should give up DRR if
>> the success rate falls for all it connections.
>>
>> 8. The  document will emphasis that the decision to continue with DRR is
> not
>> per a specific case but based on the node total success rate.
>>
>> Roni
>>
>>
>>
>>> -----Original Message-----
>>> From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
>>> Sent: 24 June, 2013 1:08 PM
>>> To: Roni Even
>>> Cc: 'P2PSIP Mailing List'
>>> Subject: Re: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
>>>
>>> Hi Roni,
>>>
>>> sure, the purpose of this document is not to create a new ICE type of
>>> mechanism, I agree. Nevertheless, the document needs to be clear about
>>> the options implementers and administrators have. That is, what is
>>> likely to work, what is not likely to work, special cases (e.g., when
>>> two nodes are in the same private address space), etc. That is the
>>> type of (brief) discussion I would like to see in the draft. When it
>>> comes to the definition of the mechanisms themselves, I am OK with them
>> as they are.
>>>
>>> Thanks,
>>>
>>> Gonzalo
>>>
>>> On 24/06/2013 11:58 AM, Roni Even wrote:
>>>> Hi Gonzalo,
>>>> During the WG discussion we were asked to have in the main body just
>>>> the case of manage networks and leave in the informational appendix
>>>> A some informational text about finding routable addresses since it
>>>> was clear that there is no guarantee that it will work. I do not
>>>> think that it is the purpose of this document to discuss the whole
>>>> topic of finding routable addresses, we are just pointing at available
>> options.
>>>> The idea is that there is always a fall back to SRR Roni
>>>>
>>>>> -----Original Message-----
>>>>> From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
>>>>> Sent: 24 June, 2013 11:11 AM
>>>>> To: Roni Even
>>>>> Cc: 'P2PSIP Mailing List'
>>>>> Subject: Re: [P2PSIP] UNSAF considerations and
>>>>> draft-ietf-p2psip-drr
>>>>>
>>>>> Hi Roni,
>>>>>
>>>>> I think the draft should discuss in more detail how a node makes
>>>>> the
>>>> decision
>>>>> of attempting to use DRR and what are the trade-offs. The case of
>>>>> closed
>>>> or
>>>>> managed networks is clear. The draft can mention that an
>>>>> administrator simply configures nodes to use DRR because the
>>>>> administrator knows, somehow, that it will work fine.
>>>>>
>>>>> In open networks, the draft should discuss the trial and error
>>>>> system
>>>> being
>>>>> proposed. For example, a node without a public IP address may be
>>>>> able to communicate directly with a node in the same non-public
>>>>> address
>>> space.
>>>>> That case is not covered by the discussions about UNSAF mechanisms.
>>>>> The whole point about developing ICE was that UNSAF mechanisms do
>>> not
>>>>> work in many situations.
>>>>>
>>>>> In short, this is an important interoperability issue because it
>>>>> relates
>>>> to when
>>>>> a node should use one mechanism or another. Therefore, the draft
>>>>> should discuss all the implications of the proposed mechanism
> carefully.
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Gonzalo
>>>>>
>>>>>
>>>>>
>>>>> On 23/06/2013 6:28 PM, Roni Even wrote:
>>>>>> Hi Gonzalo,
>>>>>> Thanks for point out to RFC3424.
>>>>>> How about adding to the following sentence an informative
>>>>>> reference to RFC3424. Note that appendix A is not creating an
>>>>>> UNSAF proposal but just mentions some methods for informational
>> purpose.
>>>>>>
>>>>>> Suggest adding to "Note that there is no foolproof way to
>>>>>> determine if a peer is publically reachable, other than via
>>>>>> out-of-band mechanisms."  to
>>>>>>
>>>>>> "Note that there is no foolproof way to determine if a peer is
>>>>>> publically reachable, other than via out-of-band mechanisms. For
>>>>>> discussion about issues with address evaluation also see UNSAF
>>>> [RFC3424]"
>>>>>>
>>>>>> I am not sure if it adds much information but it may be good to
>>>>>> have this reference
>>>>>>
>>>>>> Roni Even
>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: p2psip-bounces@ietf.org [mailto:p2psip-bounces@ietf.org]
>> On
>>>>>>> Behalf Of Gonzalo Camarillo
>>>>>>> Sent: 17 June, 2013 3:02 PM
>>>>>>> To: P2PSIP Mailing List
>>>>>>> Subject: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
>>>>>>>
>>>>>>> Folks,
>>>>>>>
>>>>>>> Appendix A of the following draft describes how a node can obtain
>>>>>>> IP addresses on which it may be reached:
>>>>>>>
>>>>>>> http://tools.ietf.org/html/draft-ietf-p2psip-drr-07#appendix-A
>>>>>>>
>>>>>>> Have you taken into account the UNSAF considerations?
>>>>>>>
>>>>>>> http://tools.ietf.org/html/rfc3424
>>>>>>>
>>>>>>> Cheers,
>>>>>>>
>>>>>>> Gonzalo
>>>>>>> _______________________________________________
>>>>>>> P2PSIP mailing list
>>>>>>> P2PSIP@ietf.org
>>>>>>> https://www.ietf.org/mailman/listinfo/p2psip
>>>>>>
>>>>
> 


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Date: Fri, 12 Jul 2013 09:21:00 -0700
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Subject: [P2PSIP] I-D Action: draft-ietf-p2psip-disco-01.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Peer-to-Peer Session Initiation Protocol =
Working Group of the IETF.

	Title           : A RELOAD Usage for Distributed Conference Control (DisCo)
	Author(s)       : Alexander Knauf
                          Thomas C. Schmidt
                          Gabriel Hege
                          Matthias Waehlisch
	Filename        : draft-ietf-p2psip-disco-01.txt
	Pages           : 37
	Date            : 2013-07-12

Abstract:
   This document defines a RELOAD Usage for Distributed Conference
   Control (DisCo) with SIP.  DisCo preserves conference addressing
   through a single SIP URI by splitting its semantic of identifier and
   locator using a new Kind data structure.  Conference members are
   enabled to select conference controllers based on proximity awareness
   and to recover from failures of individual resource instances.  DisCo
   proposes call delegation to balance the load at focus peers.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-p2psip-disco

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-p2psip-disco-01

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-p2psip-disco-01


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


From schmidt@informatik.haw-hamburg.de  Fri Jul 12 09:32:18 2013
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Date: Fri, 12 Jul 2013 18:32:01 +0200
From: "Thomas C. Schmidt" <schmidt@informatik.haw-hamburg.de>
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Cc: p2psip-chairs@tools.ietf.org, p2psip@ietf.org
Subject: Re: [P2PSIP] WGLC for draft-ietf-p2psip-sip-09
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Hi Michael,

sorry for having missed your mail: we'll address in an update.

Best,

Thomas

On 09.06.2013 17:36, Michael Chen wrote:
> Hi,
> Has the issue of keep-alive been addressed?
>    http://www.ietf.org/mail-archive/web/p2psip/current/msg06176.html
> Thanks
> --Michael
>
>     --------- Original Message ---------
>     Subject: Re: [P2PSIP] WGLC for draft-ietf-p2psip-sip-09
>     From: "Marc Petit-Huguenin" <petithug@acm.org>
>     Date: 5/20/13 8:19 am
>     To: cjbc@it.uc3m.es
>     Cc: p2psip-chairs@tools.ietf.org, p2psip@ietf.org
>
>     -----BEGIN PGP SIGNED MESSAGE-----
>     Hash: SHA256
>
>     Sorry for the delay in responding to this.
>
>     I read again the I-D, and I think that this document is ready to be
>     submitted
>     to the IESG.
>
>     On 05/04/2013 10:33 AM, Carlos Jes�s Bernardos Cano wrote:
>      > Hi,
>      >
>      > Hereby we are issuing a WGLC for draft-ietf-p2psip-sip-09.
>      >
>      > The WGLC will be open till the 20th of May. We kindly ask the WG
>     to review
>      > the document and provide comments.
>      >
>      > If you have no comments and think the document is ready to be
>     submitted to
>      > IESG, please do send a note stating that to the WG ML.
>      >
>      > Additional information about the document is below:
>      >
>      > Title : A SIP Usage for RELOAD Author(s) : Cullen Jennings
>      > Bruce B. Lowekamp Eric Rescorla Salman A. Baset Henning
>     Schulzrinne Thomas
>      > C. Schmidt Filename : draft-ietf-p2psip-sip-09.txt Pages :
>      > 19 Date : 2013-02-25
>      >
>      > Abstract: This document defines a SIP Usage for REsource LOcation And
>      > Discovery (RELOAD). The SIP Usage provides the functionality of a SIP
>      > proxy or registrar in a fully-distributed system and includes a
>     lookup
>      > service for Address of Records (AORs) stored in the overlay. It also
>      > defines Globally Routable User Agent Uris (GRUUs) that allow the
>      > registrations to map an AOR to a specific node reachable through the
>      > overlay. After such initial contact of a peer, the AppAttach
>     method is
>      > used to establish a direct connection between nodes through which SIP
>      > messages are exchanged.
>      >
>      > The IETF datatracker status page for this draft is:
>      > https://datatracker.ietf.org/doc/draft-ietf-p2psip-sip
>      >
>      > There's also a htmlized version available at:
>      > http://tools.ietf.org/html/draft-ietf-p2psip-sip-09
>      >
>
>     - --
>     Marc Petit-Huguenin
>     Email: marc@petit-huguenin.org
>     Blog: http://blog.marc.petit-huguenin.org
>     Profile: http://www.linkedin.com/in/petithug
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>     _______________________________________________
>     P2PSIP mailing list
>     P2PSIP@ietf.org
>     https://www.ietf.org/mailman/listinfo/p2psip
>
>
>
> _______________________________________________
> P2PSIP mailing list
> P2PSIP@ietf.org
> https://www.ietf.org/mailman/listinfo/p2psip
>

-- 

Prof. Dr. Thomas C. Schmidt
� Hamburg University of Applied Sciences                   Berliner Tor 7 �
� Dept. Informatik, Internet Technologies Group    20099 Hamburg, Germany �
� http://www.haw-hamburg.de/inet                   Fon: +49-40-42875-8452 �
� http://www.informatik.haw-hamburg.de/~schmidt    Fax: +49-40-42875-8409 �

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Subject: [P2PSIP] I-D Action: draft-ietf-p2psip-concepts-05.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Peer-to-Peer Session Initiation Protocol =
Working Group of the IETF.

	Title           : Concepts and Terminology for Peer to Peer SIP
	Author(s)       : David A. Bryan
                          Philip Matthews
                          Eunsoo Shim
                          Dean Willis
                          Spencer Dawkins
	Filename        : draft-ietf-p2psip-concepts-05.txt
	Pages           : 20
	Date            : 2013-07-12

Abstract:
   This document defines concepts and terminology for the use of the
   Session Initiation Protocol in a peer-to-peer environment where the
   traditional proxy-registrar and message routing functions are
   replaced by a distributed mechanism.  These mechanisms may be
   implemented using a distributed hash table or other distributed data
   mechanism with similar external properties.  This document includes a
   high-level view of the functional relationships between the network
   elements defined herein, a conceptual model of operations, and an
   outline of the related problems addressed by the P2PSIP working group
   and the RELOAD protocol ([I-D.ietf-p2psip-base],
   [I-D.ietf-p2psip-sip]) defined by the working group.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-p2psip-concepts

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-p2psip-concepts-05

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-p2psip-concepts-05


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


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Subject: [P2PSIP] I-D Action: draft-ietf-p2psip-drr-08.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Peer-to-Peer Session Initiation Protocol =
Working Group of the IETF.

	Title           : An extension to RELOAD to support Direct Response Routing
	Author(s)       : Ning Zong
                          Xingfeng Jiang
                          Roni Even
                          Yunfei Zhang
	Filename        : draft-ietf-p2psip-drr-08.txt
	Pages           : 17
	Date            : 2013-07-14

Abstract:
   This document proposes an optional extension to RELOAD to support
   direct response routing mode.  RELOAD recommends symmetric recursive
   routing for routing messages.  The new optional extension provides a
   shorter route for responses reducing the overhead on intermediate
   peers and describes the potential cases where this extension can be
   used.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-p2psip-drr

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-p2psip-drr-08

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-p2psip-drr-08


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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Peer-to-Peer Session Initiation Protocol =
Working Group of the IETF.

	Title           : An extension to RELOAD to support Relay Peer Routing
	Author(s)       : Ning Zong
                          Xingfeng Jiang
                          Roni Even
                          Yunfei Zhang
	Filename        : draft-ietf-p2psip-rpr-08.txt
	Pages           : 14
	Date            : 2013-07-14

Abstract:
   This document proposes an optional extension to RELOAD to support
   relay peer routing mode.  RELOAD recommends symmetric recursive
   routing for routing messages.  The new optional extension provides a
   shorter route for responses reducing the overhead on intermediate
   peers and describes the potential use cases where this extension can
   be used.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-p2psip-rpr

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-p2psip-rpr-08

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-p2psip-rpr-08


Internet-Drafts are also available by anonymous FTP at:
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From: Zongning <zongning@huawei.com>
To: "p2psip@ietf.org" <p2psip@ietf.org>
Thread-Topic: [P2PSIP] I-D Action: draft-ietf-p2psip-drr-08.txt
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Date: Mon, 15 Jul 2013 00:59:17 +0000
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Subject: [P2PSIP] FW:  I-D Action: draft-ietf-p2psip-drr-08.txt
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Hi,

As mentioned earlier on the list, the authors have defined a new element of=
 P2PSIP overlay configuration in DRR draft. Please see Section 7.
Thanks.

-Ning

> -----Original Message-----
> From: p2psip-bounces@ietf.org [mailto:p2psip-bounces@ietf.org] On Behalf =
Of
> internet-drafts@ietf.org
> Sent: Monday, July 15, 2013 8:50 AM
> To: i-d-announce@ietf.org
> Cc: p2psip@ietf.org
> Subject: [P2PSIP] I-D Action: draft-ietf-p2psip-drr-08.txt
>=20
>=20
> A New Internet-Draft is available from the on-line Internet-Drafts direct=
ories.
>  This draft is a work item of the Peer-to-Peer Session Initiation Protoco=
l
> Working Group of the IETF.
>=20
> 	Title           : An extension to RELOAD to support Direct Response
> Routing
> 	Author(s)       : Ning Zong
>                           Xingfeng Jiang
>                           Roni Even
>                           Yunfei Zhang
> 	Filename        : draft-ietf-p2psip-drr-08.txt
> 	Pages           : 17
> 	Date            : 2013-07-14
>=20
> Abstract:
>    This document proposes an optional extension to RELOAD to support
>    direct response routing mode.  RELOAD recommends symmetric recursive
>    routing for routing messages.  The new optional extension provides a
>    shorter route for responses reducing the overhead on intermediate
>    peers and describes the potential cases where this extension can be
>    used.
>=20
>=20
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-p2psip-drr
>=20
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-ietf-p2psip-drr-08
>=20
> A diff from the previous version is available at:
> http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-p2psip-drr-08
>=20
>=20
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
>=20
> _______________________________________________
> P2PSIP mailing list
> P2PSIP@ietf.org
> https://www.ietf.org/mailman/listinfo/p2psip

From gonzalo.camarillo@ericsson.com  Mon Jul 15 00:04:14 2013
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From: Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>
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Subject: Re: [P2PSIP] I-D Action: draft-ietf-p2psip-rpr-08.txt
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Hi,

this revision does not seem to reference the concepts draft any longer
but still has the draft under Informational References.

Cheers,

Gonzalo

On 15/07/2013 3:52 AM, internet-drafts@ietf.org wrote:
> 
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>  This draft is a work item of the Peer-to-Peer Session Initiation Protocol Working Group of the IETF.
> 
> 	Title           : An extension to RELOAD to support Relay Peer Routing
> 	Author(s)       : Ning Zong
>                           Xingfeng Jiang
>                           Roni Even
>                           Yunfei Zhang
> 	Filename        : draft-ietf-p2psip-rpr-08.txt
> 	Pages           : 14
> 	Date            : 2013-07-14
> 
> Abstract:
>    This document proposes an optional extension to RELOAD to support
>    relay peer routing mode.  RELOAD recommends symmetric recursive
>    routing for routing messages.  The new optional extension provides a
>    shorter route for responses reducing the overhead on intermediate
>    peers and describes the potential use cases where this extension can
>    be used.
> 
> 
> The IETF datatracker status page for this draft is:
> https://datatracker.ietf.org/doc/draft-ietf-p2psip-rpr
> 
> There's also a htmlized version available at:
> http://tools.ietf.org/html/draft-ietf-p2psip-rpr-08
> 
> A diff from the previous version is available at:
> http://www.ietf.org/rfcdiff?url2=draft-ietf-p2psip-rpr-08
> 
> 
> Internet-Drafts are also available by anonymous FTP at:
> ftp://ftp.ietf.org/internet-drafts/
> 
> _______________________________________________
> P2PSIP mailing list
> P2PSIP@ietf.org
> https://www.ietf.org/mailman/listinfo/p2psip
> 


From zongning@huawei.com  Mon Jul 15 00:17:20 2013
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From: Zongning <zongning@huawei.com>
To: Gonzalo Camarillo <Gonzalo.Camarillo@ericsson.com>, "p2psip@ietf.org" <p2psip@ietf.org>
Thread-Topic: [P2PSIP] I-D Action: draft-ietf-p2psip-rpr-08.txt
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Hi, Gonzalo,

It should be removed. My apologies!
I will fix it in next revision.

-Ning

> -----Original Message-----
> From: p2psip-bounces@ietf.org [mailto:p2psip-bounces@ietf.org] On Behalf =
Of
> Gonzalo Camarillo
> Sent: Monday, July 15, 2013 3:04 PM
> To: p2psip@ietf.org
> Subject: Re: [P2PSIP] I-D Action: draft-ietf-p2psip-rpr-08.txt
>=20
> Hi,
>=20
> this revision does not seem to reference the concepts draft any longer
> but still has the draft under Informational References.
>=20
> Cheers,
>=20
> Gonzalo
>=20
> On 15/07/2013 3:52 AM, internet-drafts@ietf.org wrote:
> >
> > A New Internet-Draft is available from the on-line Internet-Drafts dire=
ctories.
> >  This draft is a work item of the Peer-to-Peer Session Initiation Proto=
col
> Working Group of the IETF.
> >
> > 	Title           : An extension to RELOAD to support Relay Peer Routing
> > 	Author(s)       : Ning Zong
> >                           Xingfeng Jiang
> >                           Roni Even
> >                           Yunfei Zhang
> > 	Filename        : draft-ietf-p2psip-rpr-08.txt
> > 	Pages           : 14
> > 	Date            : 2013-07-14
> >
> > Abstract:
> >    This document proposes an optional extension to RELOAD to support
> >    relay peer routing mode.  RELOAD recommends symmetric recursive
> >    routing for routing messages.  The new optional extension provides a
> >    shorter route for responses reducing the overhead on intermediate
> >    peers and describes the potential use cases where this extension can
> >    be used.
> >
> >
> > The IETF datatracker status page for this draft is:
> > https://datatracker.ietf.org/doc/draft-ietf-p2psip-rpr
> >
> > There's also a htmlized version available at:
> > http://tools.ietf.org/html/draft-ietf-p2psip-rpr-08
> >
> > A diff from the previous version is available at:
> > http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-p2psip-rpr-08
> >
> >
> > Internet-Drafts are also available by anonymous FTP at:
> > ftp://ftp.ietf.org/internet-drafts/
> >
> > _______________________________________________
> > P2PSIP mailing list
> > P2PSIP@ietf.org
> > https://www.ietf.org/mailman/listinfo/p2psip
> >
>=20
> _______________________________________________
> P2PSIP mailing list
> P2PSIP@ietf.org
> https://www.ietf.org/mailman/listinfo/p2psip

From internet-drafts@ietf.org  Mon Jul 15 00:20:55 2013
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Subject: [P2PSIP] I-D Action: draft-ietf-p2psip-sip-10.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Peer-to-Peer Session Initiation Protocol =
Working Group of the IETF.

	Title           : A SIP Usage for RELOAD
	Author(s)       : Cullen Jennings
                          Bruce B. Lowekamp
                          Eric Rescorla
                          Salman A. Baset
                          Henning Schulzrinne
                          Thomas C. Schmidt
	Filename        : draft-ietf-p2psip-sip-10.txt
	Pages           : 19
	Date            : 2013-07-15

Abstract:
   This document defines a SIP Usage for REsource LOcation And Discovery
   (RELOAD).  The SIP Usage provides the functionality of a SIP proxy or
   registrar in a fully-distributed system and includes a lookup service
   for Address of Records (AORs) stored in the overlay.  It also defines
   Globally Routable User Agent Uris (GRUUs) that allow the
   registrations to map an AOR to a specific node reachable through the
   overlay.  After such initial contact of a peer, the AppAttach method
   is used to establish a direct connection between nodes through which
   SIP messages are exchanged.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-p2psip-sip

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-p2psip-sip-10

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-p2psip-sip-10


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


From michaelc@idssoftware.com  Mon Jul 15 10:43:22 2013
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--=_4f85c63a79b7edc08f0475a12d565f31
Content-Transfer-Encoding: quoted-printable
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 charset=utf-8

Hi Thomas,
=20
The change in sip-10 is not appropriate. Please refer to my Feb 14, 2012 co=
mment:
=20
  http://www.ietf.org/mail-archive/web/p2psip/current/msg06176.html
=20
The keep-alive needed is for the application channel created from AppAttach=
, in this case should only carry SIP traffics. Therefore, RELOAD Ping is no=
t appropriate.
=20
Instead, p2psip-sip should simply mention these two techniques or select on=
e of:
=20
  http://tools.ietf.org/html/rfc5626#section-3.5
=20
Thanks
=20
--Michael
--------- Original Message --------- Subject: Re: [P2PSIP] WGLC for draft-i=
etf-p2psip-sip-09
From: "Thomas C. Schmidt" <schmidt@fhtw-berlin.de>
Date: 7/15/13 12:21 am
To: "Michael Chen" <michaelc@idssoftware.com>
Cc: p2psip@ietf.org

Hi Michael, all,
=20
 it's updated now ... as this doc is on last call, it would be good to=20
 hear about all other comments/remarks by the Berlin meeting.
=20
 Cheers,
=20
 Thomas
=20
=20
 On 12.07.2013 18:32, Thomas C. Schmidt wrote:
 > Hi Michael,
 >
 > sorry for having missed your mail: we'll address in an update.
 >
 > Best,
 >
 > Thomas
 >
 > On 09.06.2013 17:36, Michael Chen wrote:
 >> Hi,
 >> Has the issue of keep-alive been addressed?
 >> http://www.ietf.org/mail-archive/web/p2psip/current/msg06176.html
 >> Thanks
 >> --Michael
 >>

--=_4f85c63a79b7edc08f0475a12d565f31
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Content-Type: text/html;
 charset=utf-8

<div>Hi Thomas,</div>
<div>&nbsp;</div>
<div>The change in sip-10 is not appropriate. Please refer to my Feb 14, 20=
12 comment:</div>
<div>&nbsp;</div>
<div>&nbsp; http://www.ietf.org/mail-archive/web/p2psip/current/msg06176.ht=
ml</div>
<div>&nbsp;</div>
<div>The keep-alive needed is for the application channel created from AppA=
ttach, in this case should only carry SIP traffics. Therefore, RELOAD Ping =
is not appropriate.</div>
<div>&nbsp;</div>
<div>Instead, p2psip-sip should simply mention these two techniques or sele=
ct one of:</div>
<div>&nbsp;</div>
<div>&nbsp; http://tools.ietf.org/html/rfc5626#section-3.5</div>
<div>&nbsp;</div>
<div>Thanks</div>
<div>&nbsp;</div>
<div>--Michael</div>
<blockquote class=3D"threadBlockQuote" style=3D"border-left: 2px solid #C2C=
2C2; padding-left: 3px; margin-left: 4px;">--------- Original Message -----=
----
<div>Subject: Re: [P2PSIP] WGLC for draft-ietf-p2psip-sip-09<br />From: "Th=
omas C. Schmidt" &lt;schmidt@fhtw-berlin.de&gt;<br />Date: 7/15/13 12:21 am=
<br />To: "Michael Chen" &lt;michaelc@idssoftware.com&gt;<br />Cc: p2psip@i=
etf.org<br /><br />Hi Michael, all,<br /> <br /> it's updated now ... as th=
is doc is on last call, it would be good to <br /> hear about all other com=
ments/remarks by the Berlin meeting.<br /> <br /> Cheers,<br /> <br /> Thom=
as<br /> <br /> <br /> On 12.07.2013 18:32, Thomas C. Schmidt wrote:<br /> =
&gt; Hi Michael,<br /> &gt;<br /> &gt; sorry for having missed your mail: w=
e'll address in an update.<br /> &gt;<br /> &gt; Best,<br /> &gt;<br /> &gt=
; Thomas<br /> &gt;<br /> &gt; On 09.06.2013 17:36, Michael Chen wrote:<br =
/> &gt;&gt; Hi,<br /> &gt;&gt; Has the issue of keep-alive been addressed?<=
br /> &gt;&gt; http://www.ietf.org/mail-archive/web/p2psip/current/msg06176=
=2Ehtml<br /> &gt;&gt; Thanks<br /> &gt;&gt; --Michael<br /> &gt;&gt;<br />=
 </div>
</blockquote>

--=_4f85c63a79b7edc08f0475a12d565f31--

From schmidt@informatik.haw-hamburg.de  Tue Jul 16 09:17:14 2013
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Hi Michael,

thanks for the pointer and sorry to have missed this point.

Currently I'm on travel and rather intermittently connected: We'll fix 
next week.

Best,

Thomas

On 15.07.2013 19:43, Michael Chen wrote:
> Hi Thomas,
> The change in sip-10 is not appropriate. Please refer to my Feb 14, 2012
> comment:
>    http://www.ietf.org/mail-archive/web/p2psip/current/msg06176.html
> The keep-alive needed is for the application channel created from
> AppAttach, in this case should only carry SIP traffics. Therefore,
> RELOAD Ping is not appropriate.
> Instead, p2psip-sip should simply mention these two techniques or select
> one of:
>    http://tools.ietf.org/html/rfc5626#section-3.5
> Thanks
> --Michael
>
>     --------- Original Message ---------
>     Subject: Re: [P2PSIP] WGLC for draft-ietf-p2psip-sip-09
>     From: "Thomas C. Schmidt" <schmidt@fhtw-berlin.de>
>     Date: 7/15/13 12:21 am
>     To: "Michael Chen" <michaelc@idssoftware.com>
>     Cc: p2psip@ietf.org
>
>     Hi Michael, all,
>
>     it's updated now ... as this doc is on last call, it would be good to
>     hear about all other comments/remarks by the Berlin meeting.
>
>     Cheers,
>
>     Thomas
>
>
>     On 12.07.2013 18:32, Thomas C. Schmidt wrote:
>      > Hi Michael,
>      >
>      > sorry for having missed your mail: we'll address in an update.
>      >
>      > Best,
>      >
>      > Thomas
>      >
>      > On 09.06.2013 17:36, Michael Chen wrote:
>      >> Hi,
>      >> Has the issue of keep-alive been addressed?
>      >> http://www.ietf.org/mail-archive/web/p2psip/current/msg06176.html
>      >> Thanks
>      >> --Michael
>      >>
>

-- 

Prof. Dr. Thomas C. Schmidt
° Hamburg University of Applied Sciences                   Berliner Tor 7 °
° Dept. Informatik, Internet Technologies Group    20099 Hamburg, Germany °
° http://www.haw-hamburg.de/inet                   Fon: +49-40-42875-8452 °
° http://www.informatik.haw-hamburg.de/~schmidt    Fax: +49-40-42875-8409 °

From cjbc@it.uc3m.es  Wed Jul 17 06:38:13 2013
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Hi all,

You can find a first version of the agenda for Berlin at the end of
this e-mail. Note that most updated version can always be found at:
https://datatracker.ietf.org/meeting/87/agenda/p2psip

If we missed any request or assigned a wrong slot, please let us know.

-- Brian and Carlos


-------------------------------------------------------------------------
Agenda of the P2PSIP WG meeting at IETF 87
THURSDAY, August 1, 2013
1300-1500  (Afternoon Session I), Tiergarten 1/2 
Conflicts: core, mif, i2rs, pim, saag, rmcat

-------------------------------------------------------------------------

13:00 Administrativia ...........................................  5 min
      B. Rosen, CJ. Bernardos

13:05 WG Status Update .......................................... 20 min
      B. Rosen, CJ. Bernardos

13:25 A SIP Concepts and Terminology for Peer to Peer SIP ....... 10 min
  o draft-ietf-p2psip-concepts-05
    * Presenter: Dean Willis

13:35 An extension to RELOAD to support DRR .....................  5 min
  o draft-ietf-p2psip-drr-08
    * Presenter: Zongning

13:40 A SIP Usage for RELOAD .................................... 10 min
  o draft-ietf-p2psip-sip-10
    * Presenter: Thomas C. Schmidt

13:50 A RELOAD Usage for Distributed Conference Control (DisCo) . 15 min
  o draft-ietf-p2psip-disco-01
    * Presenter: Thomas C. Schmidt

14:05 Next steps ................................................ 10 min
      B. Rosen, CJ. Bernardos

-------------------------------------------------------------------------


From gonzalo.camarillo@ericsson.com  Fri Jul 19 04:36:25 2013
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Subject: Re: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
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Hi,

I have just read version 08 of this draft. I had asked for a brief
discussion about the UNSAF considerations. This version contains a
single sentence referring to the to the UNSAF RFC without any other
discussion. I am afraid that it too brief a discussion :-)

Note that the UNSAF RFC states that it is not acceptable to define UNSAF
mechanisms unless certain conditions are met. Please, add a brief
discussion explaining why it is OK to use an UNSAF mechanism like the
one described in this draft in open networks.

The discussion should explain how this mechanism is similar to ICE in
the sense that addresses that are obtained via the INSAF mechanism are
simply tried to see if they work, and if they don't, we always have a
fall back mechanism that will work. In essence, we are just probing to
see what works and what doesn't.

Thanks,

Gonzalo



On 12/07/2013 2:29 PM, Gonzalo Camarillo wrote:
> Hi Roni,
> 
> sure, please go ahead work within the WG on this change and let me know
> when the draft is ready.
> 
> Cheers,
> 
> Gonzalo
> 
> On 12/07/2013 10:36 AM, Roni Even wrote:
>> Hi,
>> After further review we will also add to the configuration document a new
>> element that will specify the usage of DRR or RPR.
>> I assume this is a bigger change and may require the WG to look at it
>> Roni
>>
>>> -----Original Message-----
>>> From: Roni Even [mailto:ron.even.tlv@gmail.com]
>>> Sent: 09 July, 2013 2:06 PM
>>> To: 'Gonzalo Camarillo'
>>> Cc: 'P2PSIP Mailing List'
>>> Subject: RE: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
>>>
>>> Hi Gonzalo,
>>> I will try to summarize what is the current recommendation in the document
>>> and try to make  it clearer.
>>>
>>> 1. DRR is always available with a fall back to SRR.
>>> 2. Section 6.2  of the base draft says " An overlay MAY be configured to
>> use
>>> alternative routing algorithms, and alternative routing algorithms
>>>    MAY be selected on a per-message basis.  I.e., a node in an overlay
>> which
>>> supports SRR and some other routing algorithm called XXX might
>>>    use SRR some of the time and XXX some of the time."  This is the
>> preferred
>>> way when trying to use DRR based on the overlay configuration and having
>>> DRR as preferred mode.
>>> 3. The administrator when defining the configuration and not having enough
>>> knowledge (this is not a managed / private network) about the usage of DRR
>>> but still likes to try it may configure DRR. The sender may try using DRR
>> but
>>> fall back to SRR if fails as explained in section 6.4 of DRR draft.
>>>
>>> 4. section 4.2 provides guidance about how to decide of to continue using
>>> DRR or just use SRR for all cases. Still the decision to try DRR in the
>> first place
>>> will be based on configuration.
>>>
>>> 5. We can add text that say that we discourage using DRR in the open
>>> Internet or if the administrator does not feel he have enough information
>>> about the overlay network topology.
>>>
>>> 6. The application should use the configuration to decide if to try DRR
>> before
>>> SRR and fall back to SRR if fails
>>>
>>> 7. using DRR  by a node is not recommended per specific connection. The
>>> application should use DRR based on success rate and should give up DRR if
>>> the success rate falls for all it connections.
>>>
>>> 8. The  document will emphasis that the decision to continue with DRR is
>> not
>>> per a specific case but based on the node total success rate.
>>>
>>> Roni
>>>
>>>
>>>
>>>> -----Original Message-----
>>>> From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
>>>> Sent: 24 June, 2013 1:08 PM
>>>> To: Roni Even
>>>> Cc: 'P2PSIP Mailing List'
>>>> Subject: Re: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
>>>>
>>>> Hi Roni,
>>>>
>>>> sure, the purpose of this document is not to create a new ICE type of
>>>> mechanism, I agree. Nevertheless, the document needs to be clear about
>>>> the options implementers and administrators have. That is, what is
>>>> likely to work, what is not likely to work, special cases (e.g., when
>>>> two nodes are in the same private address space), etc. That is the
>>>> type of (brief) discussion I would like to see in the draft. When it
>>>> comes to the definition of the mechanisms themselves, I am OK with them
>>> as they are.
>>>>
>>>> Thanks,
>>>>
>>>> Gonzalo
>>>>
>>>> On 24/06/2013 11:58 AM, Roni Even wrote:
>>>>> Hi Gonzalo,
>>>>> During the WG discussion we were asked to have in the main body just
>>>>> the case of manage networks and leave in the informational appendix
>>>>> A some informational text about finding routable addresses since it
>>>>> was clear that there is no guarantee that it will work. I do not
>>>>> think that it is the purpose of this document to discuss the whole
>>>>> topic of finding routable addresses, we are just pointing at available
>>> options.
>>>>> The idea is that there is always a fall back to SRR Roni
>>>>>
>>>>>> -----Original Message-----
>>>>>> From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
>>>>>> Sent: 24 June, 2013 11:11 AM
>>>>>> To: Roni Even
>>>>>> Cc: 'P2PSIP Mailing List'
>>>>>> Subject: Re: [P2PSIP] UNSAF considerations and
>>>>>> draft-ietf-p2psip-drr
>>>>>>
>>>>>> Hi Roni,
>>>>>>
>>>>>> I think the draft should discuss in more detail how a node makes
>>>>>> the
>>>>> decision
>>>>>> of attempting to use DRR and what are the trade-offs. The case of
>>>>>> closed
>>>>> or
>>>>>> managed networks is clear. The draft can mention that an
>>>>>> administrator simply configures nodes to use DRR because the
>>>>>> administrator knows, somehow, that it will work fine.
>>>>>>
>>>>>> In open networks, the draft should discuss the trial and error
>>>>>> system
>>>>> being
>>>>>> proposed. For example, a node without a public IP address may be
>>>>>> able to communicate directly with a node in the same non-public
>>>>>> address
>>>> space.
>>>>>> That case is not covered by the discussions about UNSAF mechanisms.
>>>>>> The whole point about developing ICE was that UNSAF mechanisms do
>>>> not
>>>>>> work in many situations.
>>>>>>
>>>>>> In short, this is an important interoperability issue because it
>>>>>> relates
>>>>> to when
>>>>>> a node should use one mechanism or another. Therefore, the draft
>>>>>> should discuss all the implications of the proposed mechanism
>> carefully.
>>>>>>
>>>>>> Thanks,
>>>>>>
>>>>>> Gonzalo
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 23/06/2013 6:28 PM, Roni Even wrote:
>>>>>>> Hi Gonzalo,
>>>>>>> Thanks for point out to RFC3424.
>>>>>>> How about adding to the following sentence an informative
>>>>>>> reference to RFC3424. Note that appendix A is not creating an
>>>>>>> UNSAF proposal but just mentions some methods for informational
>>> purpose.
>>>>>>>
>>>>>>> Suggest adding to "Note that there is no foolproof way to
>>>>>>> determine if a peer is publically reachable, other than via
>>>>>>> out-of-band mechanisms."  to
>>>>>>>
>>>>>>> "Note that there is no foolproof way to determine if a peer is
>>>>>>> publically reachable, other than via out-of-band mechanisms. For
>>>>>>> discussion about issues with address evaluation also see UNSAF
>>>>> [RFC3424]"
>>>>>>>
>>>>>>> I am not sure if it adds much information but it may be good to
>>>>>>> have this reference
>>>>>>>
>>>>>>> Roni Even
>>>>>>>
>>>>>>>> -----Original Message-----
>>>>>>>> From: p2psip-bounces@ietf.org [mailto:p2psip-bounces@ietf.org]
>>> On
>>>>>>>> Behalf Of Gonzalo Camarillo
>>>>>>>> Sent: 17 June, 2013 3:02 PM
>>>>>>>> To: P2PSIP Mailing List
>>>>>>>> Subject: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
>>>>>>>>
>>>>>>>> Folks,
>>>>>>>>
>>>>>>>> Appendix A of the following draft describes how a node can obtain
>>>>>>>> IP addresses on which it may be reached:
>>>>>>>>
>>>>>>>> http://tools.ietf.org/html/draft-ietf-p2psip-drr-07#appendix-A
>>>>>>>>
>>>>>>>> Have you taken into account the UNSAF considerations?
>>>>>>>>
>>>>>>>> http://tools.ietf.org/html/rfc3424
>>>>>>>>
>>>>>>>> Cheers,
>>>>>>>>
>>>>>>>> Gonzalo
>>>>>>>> _______________________________________________
>>>>>>>> P2PSIP mailing list
>>>>>>>> P2PSIP@ietf.org
>>>>>>>> https://www.ietf.org/mailman/listinfo/p2psip
>>>>>>>
>>>>>
>>
> 
> _______________________________________________
> P2PSIP mailing list
> P2PSIP@ietf.org
> https://www.ietf.org/mailman/listinfo/p2psip
> 
> 


From ron.even.tlv@gmail.com  Fri Jul 19 05:41:34 2013
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From: "Roni Even" <ron.even.tlv@gmail.com>
To: "'Gonzalo Camarillo'" <Gonzalo.Camarillo@ericsson.com>, "'P2PSIP Mailing List'" <p2psip@ietf.org>
References: <51BEFAC4.3050302@ericsson.com> <004b01ce7026$55930650$00b912f0$@gmail.com> <51C7FF29.9070901@ericsson.com> <008401ce70b8$fd5ff220$f81fd660$@gmail.com> <51C81A7C.7030404@ericsson.com> <00c201ce7ed2$7da2b450$78e81cf0$@gmail.com> <51DFE8A1.50604@ericsson.com> <51E924B1.7010603@ericsson.com>
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Date: Fri, 19 Jul 2013 15:39:40 +0300
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Subject: Re: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
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Hi Gonzalo,
I will add the text you suggested, I just think that the main body talks
about falling back to SRR and says that using the DRR in open Internet is
not recommended
Roni

> -----Original Message-----
> From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
> Sent: 19 July, 2013 2:36 PM
> To: 'P2PSIP Mailing List'
> Cc: Roni Even
> Subject: Re: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
> 
> Hi,
> 
> I have just read version 08 of this draft. I had asked for a brief
discussion
> about the UNSAF considerations. This version contains a single sentence
> referring to the to the UNSAF RFC without any other discussion. I am
afraid
> that it too brief a discussion :-)
> 
> Note that the UNSAF RFC states that it is not acceptable to define UNSAF
> mechanisms unless certain conditions are met. Please, add a brief
discussion
> explaining why it is OK to use an UNSAF mechanism like the one described
in
> this draft in open networks.
> 
> The discussion should explain how this mechanism is similar to ICE in the
> sense that addresses that are obtained via the INSAF mechanism are simply
> tried to see if they work, and if they don't, we always have a fall back
> mechanism that will work. In essence, we are just probing to see what
works
> and what doesn't.
> 
> Thanks,
> 
> Gonzalo
> 
> 
> 
> On 12/07/2013 2:29 PM, Gonzalo Camarillo wrote:
> > Hi Roni,
> >
> > sure, please go ahead work within the WG on this change and let me
> > know when the draft is ready.
> >
> > Cheers,
> >
> > Gonzalo
> >
> > On 12/07/2013 10:36 AM, Roni Even wrote:
> >> Hi,
> >> After further review we will also add to the configuration document a
> >> new element that will specify the usage of DRR or RPR.
> >> I assume this is a bigger change and may require the WG to look at it
> >> Roni
> >>
> >>> -----Original Message-----
> >>> From: Roni Even [mailto:ron.even.tlv@gmail.com]
> >>> Sent: 09 July, 2013 2:06 PM
> >>> To: 'Gonzalo Camarillo'
> >>> Cc: 'P2PSIP Mailing List'
> >>> Subject: RE: [P2PSIP] UNSAF considerations and draft-ietf-p2psip-drr
> >>>
> >>> Hi Gonzalo,
> >>> I will try to summarize what is the current recommendation in the
> >>> document and try to make  it clearer.
> >>>
> >>> 1. DRR is always available with a fall back to SRR.
> >>> 2. Section 6.2  of the base draft says " An overlay MAY be
> >>> configured to
> >> use
> >>> alternative routing algorithms, and alternative routing algorithms
> >>>    MAY be selected on a per-message basis.  I.e., a node in an
> >>> overlay
> >> which
> >>> supports SRR and some other routing algorithm called XXX might
> >>>    use SRR some of the time and XXX some of the time."  This is the
> >> preferred
> >>> way when trying to use DRR based on the overlay configuration and
> >>> having DRR as preferred mode.
> >>> 3. The administrator when defining the configuration and not having
> >>> enough knowledge (this is not a managed / private network) about the
> >>> usage of DRR but still likes to try it may configure DRR. The sender
> >>> may try using DRR
> >> but
> >>> fall back to SRR if fails as explained in section 6.4 of DRR draft.
> >>>
> >>> 4. section 4.2 provides guidance about how to decide of to continue
> >>> using DRR or just use SRR for all cases. Still the decision to try
> >>> DRR in the
> >> first place
> >>> will be based on configuration.
> >>>
> >>> 5. We can add text that say that we discourage using DRR in the open
> >>> Internet or if the administrator does not feel he have enough
> >>> information about the overlay network topology.
> >>>
> >>> 6. The application should use the configuration to decide if to try
> >>> DRR
> >> before
> >>> SRR and fall back to SRR if fails
> >>>
> >>> 7. using DRR  by a node is not recommended per specific connection.
> >>> The application should use DRR based on success rate and should give
> >>> up DRR if the success rate falls for all it connections.
> >>>
> >>> 8. The  document will emphasis that the decision to continue with
> >>> DRR is
> >> not
> >>> per a specific case but based on the node total success rate.
> >>>
> >>> Roni
> >>>
> >>>
> >>>
> >>>> -----Original Message-----
> >>>> From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
> >>>> Sent: 24 June, 2013 1:08 PM
> >>>> To: Roni Even
> >>>> Cc: 'P2PSIP Mailing List'
> >>>> Subject: Re: [P2PSIP] UNSAF considerations and
> >>>> draft-ietf-p2psip-drr
> >>>>
> >>>> Hi Roni,
> >>>>
> >>>> sure, the purpose of this document is not to create a new ICE type
> >>>> of mechanism, I agree. Nevertheless, the document needs to be clear
> >>>> about the options implementers and administrators have. That is,
> >>>> what is likely to work, what is not likely to work, special cases
> >>>> (e.g., when two nodes are in the same private address space), etc.
> >>>> That is the type of (brief) discussion I would like to see in the
> >>>> draft. When it comes to the definition of the mechanisms
> >>>> themselves, I am OK with them
> >>> as they are.
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Gonzalo
> >>>>
> >>>> On 24/06/2013 11:58 AM, Roni Even wrote:
> >>>>> Hi Gonzalo,
> >>>>> During the WG discussion we were asked to have in the main body
> >>>>> just the case of manage networks and leave in the informational
> >>>>> appendix A some informational text about finding routable
> >>>>> addresses since it was clear that there is no guarantee that it
> >>>>> will work. I do not think that it is the purpose of this document
> >>>>> to discuss the whole topic of finding routable addresses, we are
> >>>>> just pointing at available
> >>> options.
> >>>>> The idea is that there is always a fall back to SRR Roni
> >>>>>
> >>>>>> -----Original Message-----
> >>>>>> From: Gonzalo Camarillo [mailto:Gonzalo.Camarillo@ericsson.com]
> >>>>>> Sent: 24 June, 2013 11:11 AM
> >>>>>> To: Roni Even
> >>>>>> Cc: 'P2PSIP Mailing List'
> >>>>>> Subject: Re: [P2PSIP] UNSAF considerations and
> >>>>>> draft-ietf-p2psip-drr
> >>>>>>
> >>>>>> Hi Roni,
> >>>>>>
> >>>>>> I think the draft should discuss in more detail how a node makes
> >>>>>> the
> >>>>> decision
> >>>>>> of attempting to use DRR and what are the trade-offs. The case of
> >>>>>> closed
> >>>>> or
> >>>>>> managed networks is clear. The draft can mention that an
> >>>>>> administrator simply configures nodes to use DRR because the
> >>>>>> administrator knows, somehow, that it will work fine.
> >>>>>>
> >>>>>> In open networks, the draft should discuss the trial and error
> >>>>>> system
> >>>>> being
> >>>>>> proposed. For example, a node without a public IP address may be
> >>>>>> able to communicate directly with a node in the same non-public
> >>>>>> address
> >>>> space.
> >>>>>> That case is not covered by the discussions about UNSAF
> mechanisms.
> >>>>>> The whole point about developing ICE was that UNSAF mechanisms
> do
> >>>> not
> >>>>>> work in many situations.
> >>>>>>
> >>>>>> In short, this is an important interoperability issue because it
> >>>>>> relates
> >>>>> to when
> >>>>>> a node should use one mechanism or another. Therefore, the draft
> >>>>>> should discuss all the implications of the proposed mechanism
> >> carefully.
> >>>>>>
> >>>>>> Thanks,
> >>>>>>
> >>>>>> Gonzalo
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> On 23/06/2013 6:28 PM, Roni Even wrote:
> >>>>>>> Hi Gonzalo,
> >>>>>>> Thanks for point out to RFC3424.
> >>>>>>> How about adding to the following sentence an informative
> >>>>>>> reference to RFC3424. Note that appendix A is not creating an
> >>>>>>> UNSAF proposal but just mentions some methods for informational
> >>> purpose.
> >>>>>>>
> >>>>>>> Suggest adding to "Note that there is no foolproof way to
> >>>>>>> determine if a peer is publically reachable, other than via
> >>>>>>> out-of-band mechanisms."  to
> >>>>>>>
> >>>>>>> "Note that there is no foolproof way to determine if a peer is
> >>>>>>> publically reachable, other than via out-of-band mechanisms. For
> >>>>>>> discussion about issues with address evaluation also see UNSAF
> >>>>> [RFC3424]"
> >>>>>>>
> >>>>>>> I am not sure if it adds much information but it may be good to
> >>>>>>> have this reference
> >>>>>>>
> >>>>>>> Roni Even
> >>>>>>>
> >>>>>>>> -----Original Message-----
> >>>>>>>> From: p2psip-bounces@ietf.org [mailto:p2psip-
> bounces@ietf.org]
> >>> On
> >>>>>>>> Behalf Of Gonzalo Camarillo
> >>>>>>>> Sent: 17 June, 2013 3:02 PM
> >>>>>>>> To: P2PSIP Mailing List
> >>>>>>>> Subject: [P2PSIP] UNSAF considerations and
> >>>>>>>> draft-ietf-p2psip-drr
> >>>>>>>>
> >>>>>>>> Folks,
> >>>>>>>>
> >>>>>>>> Appendix A of the following draft describes how a node can
> >>>>>>>> obtain IP addresses on which it may be reached:
> >>>>>>>>
> >>>>>>>> http://tools.ietf.org/html/draft-ietf-p2psip-drr-07#appendix-A
> >>>>>>>>
> >>>>>>>> Have you taken into account the UNSAF considerations?
> >>>>>>>>
> >>>>>>>> http://tools.ietf.org/html/rfc3424
> >>>>>>>>
> >>>>>>>> Cheers,
> >>>>>>>>
> >>>>>>>> Gonzalo
> >>>>>>>> _______________________________________________
> >>>>>>>> P2PSIP mailing list
> >>>>>>>> P2PSIP@ietf.org
> >>>>>>>> https://www.ietf.org/mailman/listinfo/p2psip
> >>>>>>>
> >>>>>
> >>
> >
> > _______________________________________________
> > P2PSIP mailing list
> > P2PSIP@ietf.org
> > https://www.ietf.org/mailman/listinfo/p2psip
> >
> >


From schmidt@informatik.haw-hamburg.de  Sun Jul 21 14:56:49 2013
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Hi Michael,

thanks again for the pointer - please see inline.

On 15.07.2013 19:43, Michael Chen wrote:
> The change in sip-10 is not appropriate. Please refer to my Feb 14, 2012
> comment:
>    http://www.ietf.org/mail-archive/web/p2psip/current/msg06176.html
> The keep-alive needed is for the application channel created from
> AppAttach, in this case should only carry SIP traffics. Therefore,
> RELOAD Ping is not appropriate.

Yup - sorry, I was too quick. A new version of the draft can be 
provisionally obtained from 
http://inet.cpt.haw-hamburg.de/papers/draft-ietf-p2psip-sip-11.txt until 
the submission re-opens.

However, as we are talking about plain SIP connectivity, there is just a 
reference pointer useful ... nothing new here.

> Instead, p2psip-sip should simply mention these two techniques or select
> one of:
>    http://tools.ietf.org/html/rfc5626#section-3.5

We've added the reference - a selection of the techniques depends on the 
transport choice.

Cheers,

Thomas


>     --------- Original Message ---------
>     Subject: Re: [P2PSIP] WGLC for draft-ietf-p2psip-sip-09
>     From: "Thomas C. Schmidt" <schmidt@fhtw-berlin.de>
>     Date: 7/15/13 12:21 am
>     To: "Michael Chen" <michaelc@idssoftware.com>
>     Cc: p2psip@ietf.org
>
>     Hi Michael, all,
>
>     it's updated now ... as this doc is on last call, it would be good to
>     hear about all other comments/remarks by the Berlin meeting.
>
>     Cheers,
>
>     Thomas
>
>
>     On 12.07.2013 18:32, Thomas C. Schmidt wrote:
>      > Hi Michael,
>      >
>      > sorry for having missed your mail: we'll address in an update.
>      >
>      > Best,
>      >
>      > Thomas
>      >
>      > On 09.06.2013 17:36, Michael Chen wrote:
>      >> Hi,
>      >> Has the issue of keep-alive been addressed?
>      >> http://www.ietf.org/mail-archive/web/p2psip/current/msg06176.html
>      >> Thanks
>      >> --Michael
>      >>
>

-- 

Prof. Dr. Thomas C. Schmidt
° Hamburg University of Applied Sciences                   Berliner Tor 7 °
° Dept. Informatik, Internet Technologies Group    20099 Hamburg, Germany °
° http://www.haw-hamburg.de/inet                   Fon: +49-40-42875-8452 °
° http://www.informatik.haw-hamburg.de/~schmidt    Fax: +49-40-42875-8409 °

From internet-drafts@ietf.org  Mon Jul 29 00:38:50 2013
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Subject: [P2PSIP] I-D Action: draft-ietf-p2psip-sip-11.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Peer-to-Peer Session Initiation Protocol =
Working Group of the IETF.

	Title           : A SIP Usage for RELOAD
	Author(s)       : Cullen Jennings
                          Bruce B. Lowekamp
                          Eric Rescorla
                          Salman A. Baset
                          Henning Schulzrinne
                          Thomas C. Schmidt
	Filename        : draft-ietf-p2psip-sip-11.txt
	Pages           : 19
	Date            : 2013-07-29

Abstract:
   This document defines a SIP Usage for REsource LOcation And Discovery
   (RELOAD).  The SIP Usage provides the functionality of a SIP proxy or
   registrar in a fully-distributed system and includes a lookup service
   for Address of Records (AORs) stored in the overlay.  It also defines
   Globally Routable User Agent Uris (GRUUs) that allow the
   registrations to map an AOR to a specific node reachable through the
   overlay.  After such initial contact of a peer, the AppAttach method
   is used to establish a direct connection between nodes through which
   SIP messages are exchanged.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-p2psip-sip

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-p2psip-sip-11

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-p2psip-sip-11


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/


From schmidt@informatik.haw-hamburg.de  Mon Jul 29 00:42:00 2013
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Date: Mon, 29 Jul 2013 09:41:48 +0200
From: "Thomas C. Schmidt" <schmidt@informatik.haw-hamburg.de>
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Hi,

in the previous discussion we have overlooked that ICE includes 
keepalives of data channels. This has now been added to the submission.

Cheers,

Thomas

On 21.07.2013 23:56, Thomas C. Schmidt wrote:
> Hi Michael,
>
> thanks again for the pointer - please see inline.
>
> On 15.07.2013 19:43, Michael Chen wrote:
>> The change in sip-10 is not appropriate. Please refer to my Feb 14, 2012
>> comment:
>>    http://www.ietf.org/mail-archive/web/p2psip/current/msg06176.html
>> The keep-alive needed is for the application channel created from
>> AppAttach, in this case should only carry SIP traffics. Therefore,
>> RELOAD Ping is not appropriate.
>
> Yup - sorry, I was too quick. A new version of the draft can be
> provisionally obtained from
> http://inet.cpt.haw-hamburg.de/papers/draft-ietf-p2psip-sip-11.txt until
> the submission re-opens.
>
> However, as we are talking about plain SIP connectivity, there is just a
> reference pointer useful ... nothing new here.
>
>> Instead, p2psip-sip should simply mention these two techniques or select
>> one of:
>>    http://tools.ietf.org/html/rfc5626#section-3.5
>
> We've added the reference - a selection of the techniques depends on the
> transport choice.
>
> Cheers,
>
> Thomas
>
>
>>     --------- Original Message ---------
>>     Subject: Re: [P2PSIP] WGLC for draft-ietf-p2psip-sip-09
>>     From: "Thomas C. Schmidt" <schmidt@fhtw-berlin.de>
>>     Date: 7/15/13 12:21 am
>>     To: "Michael Chen" <michaelc@idssoftware.com>
>>     Cc: p2psip@ietf.org
>>
>>     Hi Michael, all,
>>
>>     it's updated now ... as this doc is on last call, it would be good to
>>     hear about all other comments/remarks by the Berlin meeting.
>>
>>     Cheers,
>>
>>     Thomas
>>
>>
>>     On 12.07.2013 18:32, Thomas C. Schmidt wrote:
>>      > Hi Michael,
>>      >
>>      > sorry for having missed your mail: we'll address in an update.
>>      >
>>      > Best,
>>      >
>>      > Thomas
>>      >
>>      > On 09.06.2013 17:36, Michael Chen wrote:
>>      >> Hi,
>>      >> Has the issue of keep-alive been addressed?
>>      >> http://www.ietf.org/mail-archive/web/p2psip/current/msg06176.html
>>      >> Thanks
>>      >> --Michael
>>      >>
>>
>

-- 

Prof. Dr. Thomas C. Schmidt
° Hamburg University of Applied Sciences                   Berliner Tor 7 °
° Dept. Informatik, Internet Technologies Group    20099 Hamburg, Germany °
° http://www.haw-hamburg.de/inet                   Fon: +49-40-42875-8452 °
° http://www.informatik.haw-hamburg.de/~schmidt    Fax: +49-40-42875-8409 °

From cjbc@it.uc3m.es  Mon Jul 29 06:59:51 2013
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From: Carlos =?ISO-8859-1?Q?Jes=FAs?= Bernardos Cano <cjbc@it.uc3m.es>
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Hi,

I've performed a Document Shepherd review of
draft-ietf-p2psip-service-discovery-08.

I think the document is in very good shape and I'll be requesting the
publication of the document later this week. I have some very minor
comments that maybe can be addressed by the authors in the next revision
of the document, together with any other comments you might get during
the next steps in the publication process:

- Page 4. Section 2 (Terminology). There is a reference to
draft-ietf-p2psip-concepts. We'll discuss in this meeting (and follow up
on the ML later) what to do with this document. Depending on the
decision, you might need to modify/remove this part and add some other
changes.

- Page 4. Section 2 (Terminology). I think adding some text introducing
the listed terms would not harm.

- Sections 10.2 and 10.3. I guess RFC-AAAA refers to the number assigned
to the document when finally published, right? If so, adding a note to
the RFC-Editor would not harm. Please, also fix table in Section 10.3
(now it expands over two different pages).

- Page 3: "it scales linearly in the number of nodes" --> I think it
should be "it scales linearly in the number of nodes".

Thanks,

Carlos


From cjbc@it.uc3m.es  Mon Jul 29 07:12:04 2013
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Cc: draft-ietf-p2psip-self-tuning@tools.ietf.org
Subject: [P2PSIP] Review of draft-ietf-p2psip-self-tuning-08
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Hi,

I've performed a Document Shepherd review of
draft-ietf-p2psip-self-tuning-08.

I think the document is in very good shape and I'll be requesting the
publication of the document later this week. I have some very minor
comments that maybe can be addressed by the authors in the next revision
of the document, together with any other comments you might get during
the next steps in the publication process:

- Page 3. Section 1 (Introduction). Expand DHT (first time it appears on
the document).

- Page 4. Section 2 (Terminology). There is a reference to
draft-ietf-p2psip-concepts. We'll discuss in this meeting (and follow up
on the ML later) what to do with this document. Depending on the
decision, you might need to modify/remove this part and add some other
changes.

- Page 4. Section 2 (Terminology). I think adding some text introducing
the listed terms would not harm.

- Page 4. Section 2 (Terminology). Some reordering of the terms might be
useful. For example, numBitsInNodeId can be introduced before Chord
Ring. Some comment about Routing Table and Successor List.

- Page 4. Section 2 (Terminology). Not sure it is needed to explain what
log2(N) represents.

- Page 16. Not sure if it is worth to explicitly mention if the result
of the join_rate field is a "floor" or a "ceil".

- Page 16. I'd maybe use "(log2(N))^2" instead of "log2^2(N)".

- Security Considerations. What would happen if a node sends fake
estimates? Maybe we need to add some text on that.

- Section 9.1. I guess RFC-AAAA refers to the number assigned to RELOAD
RFC, right? If so, adding a note to the RFC-Editor would not harm. 

- Section 11 (References). Ref [I-D.ietf-mmusic-ice] needs to be updated
with RFC 5245.

- Section 11 (References). Check consistency in the format used for the
references. For example, use expanded or shortened month names in all of
them.

- The nits checking tool also reports the following:

"The document seems to use 'NOT RECOMMENDED' as an RFC 2119 keyword, but
does not include the phrase in its RFC 2119 key words list."

Thanks,

Carlos


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Subject: [P2PSIP] I-D Action: draft-ietf-p2psip-disco-02.txt
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A New Internet-Draft is available from the on-line Internet-Drafts director=
ies.
 This draft is a work item of the Peer-to-Peer Session Initiation Protocol =
Working Group of the IETF.

	Title           : A RELOAD Usage for Distributed Conference Control (DisCo)
	Author(s)       : Alexander Knauf
                          Thomas C. Schmidt
                          Gabriel Hege
                          Matthias Waehlisch
	Filename        : draft-ietf-p2psip-disco-02.txt
	Pages           : 46
	Date            : 2013-07-31

Abstract:
   This document defines a RELOAD Usage for Distributed Conference
   Control (DisCo) with SIP.  DisCo preserves conference addressing
   through a single SIP URI by splitting its semantic of identifier and
   locator using a new Kind data structure.  Conference members are
   enabled to select conference controllers based on proximity awareness
   and to recover from failures of individual resource instances.  DisCo
   proposes call delegation to balance the load at focus peers.


The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-p2psip-disco

There's also a htmlized version available at:
http://tools.ietf.org/html/draft-ietf-p2psip-disco-02

A diff from the previous version is available at:
http://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-p2psip-disco-02


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/


From cjbc@it.uc3m.es  Wed Jul 31 16:19:40 2013
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From: Carlos =?ISO-8859-1?Q?Jes=FAs?= Bernardos Cano <cjbc@it.uc3m.es>
To: p2psip@ietf.org
Date: Thu, 01 Aug 2013 01:19:31 +0200
Organization: Universidad Carlos III de Madrid
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Cc: draft-ietf-p2psip-diagnostics@tools.ietf.org
Subject: [P2PSIP] Review of draft-ietf-p2psip-diagnostics
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Hi,

I've performed a Document Shepherd review of
draft-ietf-p2psip-diagnostics. My review is attached to this e-mail (I
added comments to the PDF version of the draft, hope this is fine).

I'd like authors to go through the comments before sending the document
to the IESG. There might be some issues that need to be brought to the
WG for discussion.

Thanks,

Carlos


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