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List:       openser-devel
Subject:    [sr-dev] [kamailio] modules/uac: Record-Route header parameter format for replace_uri (#455)
From:       Dmitri Savolainen <notifications () github ! com>
Date:       2015-12-27 13:38:27
Message-ID: kamailio/kamailio/issues/455 () github ! com
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Module uac use some kind of Base64 for SipUri saving in Record-Route header parameter \
"rr_from_store_param"  Base64 is case sensitive, but according to rfc3261:
```
   When comparing header fields, field names are always case-
   insensitive  Unless otherwise stated in the definition of a
   particular header field, field values, parameter names, and parameter
   values are case-insensitive  Tokens are always case-insensitive
   Unless specified otherwise, values expressed as quoted strings are
   case-sensitive For example,

      Contact: <sip:alice@atlantacom>;expires=3600

   is equivalent to

      CONTACT: <sip:alice@atlantacom>;ExPiReS=3600

   and

      Content-Disposition: session;handling=optional

   is equivalent to

      content-disposition: Session;HANDLING=OPTIONAL

   The following two header fields are not equivalent:

      Warning: 370 devnull "Choose a bigger pipe"
      Warning: 370 devnull "CHOOSE A BIGGER PIPE"
```
Ok " values expressed as quoted strings are case-sensitive", so I thought to make a \
quoted string like ```
Record-Route: <sip:xxxxxxxxxxxx:5071;lr;ftag=SDj3nsa01-78422015;vsf="baSE64strinG";nat=yes>
 ```
but according to rfc3261 DQUATE is not possible here:
```
other-param       =  pname [ "=" pvalue ]
pname             =  1*paramchar
pvalue            =  1*paramchar
paramchar         =  param-unreserved / unreserved / escaped
param-unreserved  =  "[" / "]" / "/" / ":" / "&" / "+" / "$"
```
Some devices in my network convert "rr_from_store_param" to lower-case letters, so \
there is trash in To/From headers after restore,  It is not wise behaviour, but is \
rfc compliant 

So any idea for using Base32 instead of Base64?

---
Reply to this email directly or view it on GitHub:
https://github.com/kamailio/kamailio/issues/455


[Attachment #5 (text/html)]

<p>Module uac use some kind of Base64 for SipUri saving in Record-Route header \
parameter "rr_from_store_param" <br> Base64 is case sensitive, but according to \
rfc3261:</p>

<pre><code>   When comparing header fields, field names are always case-
   insensitive  Unless otherwise stated in the definition of a
   particular header field, field values, parameter names, and parameter
   values are case-insensitive  Tokens are always case-insensitive
   Unless specified otherwise, values expressed as quoted strings are
   case-sensitive For example,

      Contact: &lt;sip:alice@atlantacom&gt;;expires=3600

   is equivalent to

      CONTACT: &lt;sip:alice@atlantacom&gt;;ExPiReS=3600

   and

      Content-Disposition: session;handling=optional

   is equivalent to

      content-disposition: Session;HANDLING=OPTIONAL

   The following two header fields are not equivalent:

      Warning: 370 devnull "Choose a bigger pipe"
      Warning: 370 devnull "CHOOSE A BIGGER PIPE"
</code></pre>

<p>Ok " values expressed as quoted strings are case-sensitive", so I thought to make \
a quoted string like</p>

<pre><code>Record-Route: \
&lt;sip:xxxxxxxxxxxx:5071;lr;ftag=SDj3nsa01-78422015;vsf="baSE64strinG";nat=yes&gt; \
</code></pre>

<p>but according to rfc3261 DQUATE is not possible here:</p>

<pre><code>other-param       =  pname [ "=" pvalue ]
pname             =  1*paramchar
pvalue            =  1*paramchar
paramchar         =  param-unreserved / unreserved / escaped
param-unreserved  =  "[" / "]" / "/" / ":" / "&amp;" / "+" / "$"
</code></pre>

<p>Some devices in my network convert "rr_from_store_param" to lower-case letters, so \
there is trash in To/From headers after restore,  It is not wise behaviour, but is \
rfc compliant </p>

<p>So any idea for using Base32 instead of Base64?</p>

<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">&mdash;<br>Reply \
to this email directly or <a \
href="https://github.com/kamailio/kamailio/issues/455">view it on GitHub</a>.<img \
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