[OpenSIPS-Users] Does topology hiding match RFC3261?

[vasilevalex]

Hello.

OpenSIPS 2.4.2

I use topology hiding module without dialog module. So it changes Contact
URI, adding thinfo param (default).
But it is added like this:
Contact:
<sip:[0:0:0:0:0:0:0:1]:8061;transport=wss;thinfo="U2h5YhUORg5uUBNZW1dIUAQadlZjRlFWUV0DBHJXRGgWBhZdBwxxSWRaTVBWXxgGcF9pXVNUVg==">

I checked it with RFC3261
https://tools.ietf.org/html/rfc3261#section-25.1

Contact        =  ("Contact" / "m" ) HCOLON
                  ( STAR / (contact-param *(COMMA contact-param)))
contact-param  =  (name-addr / addr-spec) *(SEMI contact-params)
name-addr      =  [ display-name ] LAQUOT addr-spec RAQUOT
addr-spec      =  SIP-URI / SIPS-URI / absoluteURI
display-name   =  *(token LWS)/ quoted-string
SIP-URI          =  "sip:" [ userinfo ] hostport
                    uri-parameters [ headers ]
SIPS-URI         =  "sips:" [ userinfo ] hostport
                    uri-parameters [ headers ]
uri-parameters    =  *( ";" uri-parameter)
uri-parameter     =  transport-param / user-param / method-param
                     / ttl-param / maddr-param / lr-param / other-param
other-param       =  pname [ "=" pvalue ]
pname             =  1*paramchar
pvalue            =  1*paramchar
paramchar         =  param-unreserved / unreserved / escaped
param-unreserved  =  "[" / "]" / "/" / ":" / "&" / "+" / "$"
unreserved  =  alphanum / mark
      mark        =  "-" / "_" / "." / "!" / "~" / "*" / "'"
                     / "(" / ")"
      escaped     =  "%" HEXDIG HEXDIG
contact-params     =  c-p-q / c-p-expires
                      / contact-extension
c-p-q              =  "q" EQUAL qvalue
c-p-expires        =  "expires" EQUAL delta-seconds
contact-extension  =  generic-param
generic-param  =  token [ EQUAL gen-value ]
gen-value      =  token / host / quoted-string
quoted-string  =  SWS DQUOTE *(qdtext / quoted-pair ) DQUOTE
qdtext         =  LWS / %x21 / %x23-5B / %x5D-7E
                        / UTF8-NONASCII

So between LAQUOT and RAQUOT there is addr-spec. And according 
to RFC it can't contain  quoted-string, or even DQUOTE symbol.
And can't contain EQUAL sign. Or they must be escaped.
But if it is possible to move "thinfo" from Contact URI to Contact params,
it can be quoted string, like it is now.



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