I think your error is that you are trying to create a Contact header which is not valid.
If the BNF grammar doesn't permit your header, then you shouldn't try to construct it. >>it is possible to create a >>"Contact" HCOLON STAR _or_ >>"Contact" HCOLON ((contact-param *(COMMA contact-param)) Correct, but "Contact: *; expires=0" is none of the above so it is not valid. Regards, Attila -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Michael Hirschbichler Sent: 17 April 2007 10:40 To: [email protected] Subject: [Sip-implementors] Question regarding BNF and Contact:-Header Hi, I am trying to create the contact-header Contact: *; expires=0 but if I use the BNF in RFC 3261, I am not able to reconstruct it: RFC3261: ======================================================== ... 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 SEMI = SWS ";" SWS ; semicolon STAR = SWS "*" SWS ; asterisk HCOLON = *( SP / HTAB ) ":" SWS RAQUOT = ">" SWS ; right angle quote LAQUOT = SWS "<"; left angle quote ... ======================================================== Regarding ("Contact" / "m" ) HCOLON ( STAR / (contact-param *(COMMA contact-param))) it is possible to create a "Contact" HCOLON STAR _or_ "Contact" HCOLON ((contact-param *(COMMA contact-param)) So, where is my error? Best regards Michael _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
