On Tue, Aug 30, 2016 at 06:48:24PM +0200, Marco Angaroni wrote:
> Current parsing methods for SIP header Call-ID do not check correctly all
> characters allowed by RFC 3261. In particular "," character is allowed
> instead of "'" character. As a result Call-ID headers like the following
> are discarded by IPVS SIP persistence engine.
>
> Call-ID: -.!%*_+`'~()<>:\"/[]?{}
>
> Above example is composed using all non-alphanumeric characters listed
> in RFC 3261 for Call-ID header syntax.
>
> Proposed fix is in nf_conntrack_sip module; function iswordc() checks this
> range: (c >= '(' && c <= '/') which includes these characters: ()*+,-./
> They are all allowed except ",". Instead "'" is not included in the list.
>
> Below is an extract of relevant SIP ABNF syntax.
>
> Call-ID = ( "Call-ID" / "i" ) HCOLON callid
> callid = word [ "@" word ]
>
> HCOLON = *( SP / HTAB ) ":" SWS
> SWS = [LWS] ; sep whitespace
> LWS = [*WSP CRLF] 1*WSP ; linear whitespace
> WSP = SP / HTAB
> word = 1*(alphanum / "-" / "." / "!" / "%" / "*" /
> "_" / "+" / "`" / "'" / "~" /
> "(" / ")" / "<" / ">" /
> ":" / "\" / DQUOTE /
> "/" / "[" / "]" / "?" /
> "{" / "}" )
Also applied, thanks.
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