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Wei Su

2005-Mar-18 11:41 UTC

[Asterisk-Users] Asterisk handling of SIP info

We encouter a situation where we need to use SIP info to convey infomation
for one end point to another endpoint. I use asterisk to do the test and
find asterisk does not forward the SIP info to another endpoint, but act as
UAS and returns a 4xx error message. I think asterisk is not right to handle
this SIP info message. 
 
In RFC 3261 Page 70 "This protocol is designed to be extended. Future
extensions may define new methods and header fields at any time. An element
MUST NOT refuse to proxy a request becasue it contains a method or header
field it does not know about". In this case, asterisk does not understand
this INFO message, so it acts as a UAS instead of proxy.
 
How to let asterisk just forward this request to the other endpoint and
instead processing it as a UAS?
 
Thank you,
 
Wei
 
 
 
 
Here is the log from the asterisk server:
 
Mar 17 12:01:31 WARNING[2804]: chan_sip.c:6134 receive_info: Unable to parse
INFO message 
 
 
Here is the trace:
 
 
Frame 96 (808 bytes on wire, 808 bytes captured)
Session Initiation Protocol
    Request-Line: INFO sip:6002@192.168.10.90 SIP/2.0
        Method: INFO
        Resent Packet: False
    Message Header
        Call-ID: 60b8596c-4135c-c0a81e68@192.168.10.90
        From: Demo2<sip:6003@192.168.10.90;user=phone>;tag=221a0-a1cf
            SIP Display info: Demo2
            SIP from address: sip:6003@192.168.10.90
            SIP tag: 221a0-a1cf
        To: <sip:6002@192.168.10.90;user=phone>;tag=as6b294484
            SIP to address: sip:6002@192.168.10.90
            SIP tag: as6b294484
        CSeq: 102 INFO
        Via: SIP/2.0/UDP 192.168.10.164:5060
        Contact: Demo2<sip:6003@192.168.10.164:5060;user=phone>
        Max-Forwards: 70
        Supported: timer
        Proxy-Authorization: Digest
username="6003",realm="asterisk",uri="sip:6002@192.168.10.90",response="034d
6b15ec1b2fa91f59c55d51c0a8e7",nonce="70c7fe86"
        Content-Type: application/media_control+xml
        Content-Length: 195
    Message body
        <?xml version="1.0" encoding="utf-8" ?>\n
         <media_control>\n
          <vc_primitive>\n
           <to_encoder>\n
            <picture_fast_update>\n
            </picture_fast_update>\n
           </to_encoder>\n
          </vc_primitive>\n
         </media_control>
 

Frame 97 (430 bytes on wire, 430 bytes captured)
Session Initiation Protocol
    Status-Line: SIP/2.0 415 Unsupported media type
        Status-Code: 415
        Resent Packet: False
    Message Header
        Via: SIP/2.0/UDP 192.168.10.164:5060
        From: Demo2<sip:6003@192.168.10.90;user=phone>;tag=221a0-a1cf
            SIP Display info: Demo2
            SIP from address: sip:6003@192.168.10.90
            SIP tag: 221a0-a1cf
        To: <sip:6002@192.168.10.90;user=phone>;tag=as6b294484
            SIP to address: sip:6002@192.168.10.90
            SIP tag: as6b294484
        Call-ID: 60b8596c-4135c-c0a81e68@192.168.10.90
        CSeq: 102 INFO
        User-Agent: Asterisk PBX
        Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
        Contact: <sip:6002@192.168.10.90>
        Content-Length: 0

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Steve Blair

2005-Mar-18 11:49 UTC

head link

[Asterisk-Users] Asterisk handling of SIP info

The last time I looked Asterisk was not a proxy server. It has been
quite a while since I looked however so I may be mistaken as to it's
SIP capabilities.

Eric Wieling

2005-Mar-18 11:51 UTC

head link

[Asterisk-Users] Asterisk handling of SIP info

Asterisk is not a SIP proxy.

Wei Su wrote:
> We encouter a situation where we need to use SIP info to convey infomation
> for one end point to another endpoint. I use asterisk to do the test and
> find asterisk does not forward the SIP info to another endpoint, but act as
> UAS and returns a 4xx error message. I think asterisk is not right to
handle
> this SIP info message. 
>  
> In RFC 3261 Page 70 "This protocol is designed to be extended. Future
> extensions may define new methods and header fields at any time. An element
> MUST NOT refuse to proxy a request becasue it contains a method or header
> field it does not know about". In this case, asterisk does not
understand
> this INFO message, so it acts as a UAS instead of proxy.
>  
> How to let asterisk just forward this request to the other endpoint and
> instead processing it as a UAS?
>  
> Thank you,
>  
> Wei
>  
>  
>  
>  
> Here is the log from the asterisk server:
>  
> Mar 17 12:01:31 WARNING[2804]: chan_sip.c:6134 receive_info: Unable to
parse
> INFO message 
>  
>  
> Here is the trace:
>  
>  
> Frame 96 (808 bytes on wire, 808 bytes captured)
> Session Initiation Protocol
>     Request-Line: INFO sip:6002@192.168.10.90 SIP/2.0
>         Method: INFO
>         Resent Packet: False
>     Message Header
>         Call-ID: 60b8596c-4135c-c0a81e68@192.168.10.90
>         From: Demo2<sip:6003@192.168.10.90;user=phone>;tag=221a0-a1cf
>             SIP Display info: Demo2
>             SIP from address: sip:6003@192.168.10.90
>             SIP tag: 221a0-a1cf
>         To: <sip:6002@192.168.10.90;user=phone>;tag=as6b294484
>             SIP to address: sip:6002@192.168.10.90
>             SIP tag: as6b294484
>         CSeq: 102 INFO
>         Via: SIP/2.0/UDP 192.168.10.164:5060
>         Contact: Demo2<sip:6003@192.168.10.164:5060;user=phone>
>         Max-Forwards: 70
>         Supported: timer
>         Proxy-Authorization: Digest
>
username="6003",realm="asterisk",uri="sip:6002@192.168.10.90",response="034d
> 6b15ec1b2fa91f59c55d51c0a8e7",nonce="70c7fe86"
>         Content-Type: application/media_control+xml
>         Content-Length: 195
>     Message body
>         <?xml version="1.0" encoding="utf-8" ?>\n
>          <media_control>\n
>           <vc_primitive>\n
>            <to_encoder>\n
>             <picture_fast_update>\n
>             </picture_fast_update>\n
>            </to_encoder>\n
>           </vc_primitive>\n
>          </media_control>
>  
> 
> Frame 97 (430 bytes on wire, 430 bytes captured)
> Session Initiation Protocol
>     Status-Line: SIP/2.0 415 Unsupported media type
>         Status-Code: 415
>         Resent Packet: False
>     Message Header
>         Via: SIP/2.0/UDP 192.168.10.164:5060
>         From: Demo2<sip:6003@192.168.10.90;user=phone>;tag=221a0-a1cf
>             SIP Display info: Demo2
>             SIP from address: sip:6003@192.168.10.90
>             SIP tag: 221a0-a1cf
>         To: <sip:6002@192.168.10.90;user=phone>;tag=as6b294484
>             SIP to address: sip:6002@192.168.10.90
>             SIP tag: as6b294484
>         Call-ID: 60b8596c-4135c-c0a81e68@192.168.10.90
>         CSeq: 102 INFO
>         User-Agent: Asterisk PBX
>         Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
>         Contact: <sip:6002@192.168.10.90>
>         Content-Length: 0
> 
> 
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Asterisk-Users mailing list
> Asterisk-Users@lists.digium.com
> http://lists.digium.com/mailman/listinfo/asterisk-users
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
> 
> 
> ------------------------------------------------------------------------
> 
> This message has been 'sanitized'.  This means that potentially
> dangerous content has been rewritten or removed.  The following
> log describes which actions were taken.
> 
> Sanitizer (start="1111171580"):
>   Part (pos="2669"):
>     Part (pos="182"):
>       SanitizeFile (filename="unnamed.txt",
mimetype="text/plain"):
>         Match (names="unnamed.txt", rule="1"):
>           Enforced policy: accept
> 
>     Part (pos="3417"):
>       SanitizeFile (filename="unnamed.html",
mimetype="text/html"):
>         Match (names="unnamed.html", rule="3"):
>           ScanFile (file="/tmp/att-423b21fc-N8P-unnamed.html"):
>             Scan succeeded, file is clean.
> 
>           Enforced policy: unknown
> 
>         Match (names="unnamed.html", rule="4"):
>           Enforced policy: accept
> 
>       Note: Styles and layers give attackers many tools to fool the
>       user and common browsers interpret Javascript code found
>       within style definitions.  References:
>        - http://www.securityfocus.com/bid/630
>        -
http://archives.indenial.com/hypermail/bugtraq/2001/January2001/0512.html
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_FONT
face=&#23435;&#20307;_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;"_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_SPAN class=359343218-18032005_<<
>                     as: >>_DEFANGED_SPAN
class=359343218-18032005_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/SPAN_<<
>                     as: >>_/DEFANGED_SPAN_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_DIV_<<
>                     as: >>_p__DEFANGED_DIV_<<
>       Rewrote HTML tag: >>_FONT face=&#23435;&#20307;
size=2_<<
>                     as: >>_FONT
DEFANGED_face="&#23435;&#20307;" size="2"_<<
>       Rewrote HTML tag: >>_/DIV_<<
>                     as: >>_/p__DEFANGED_DIV_<<
> 
>   Part (pos="13954"):
>     SanitizeFile (filename="unnamed.txt",
mimetype="text/plain"):
>       Match (names="unnamed.txt", rule="1"):
>         Enforced policy: accept
> 
>   Total modifications so far: 91
> 
> 
> Anomy 0.0.0 : Sanitizer.pm
> $Id: Sanitizer.pm,v 1.89 2004/09/02 10:14:15 bre Exp $

-- 
Always do right. This will gratify some people and astonish the rest.
Mark Twain

Kevin P. Fleming

2005-Mar-18 11:53 UTC

head link

[Asterisk-Users] Asterisk handling of SIP info

Wei Su wrote:
> How to let asterisk just forward this request to the other endpoint and
> instead processing it as a UAS?
Asterisk _IS_ a UAS, it is not a proxy.

(Also, in the future, please send plain-text (not HTML) messages to 
public mailing lists)

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