//inv - globalny invite, via - globalna via z invitu
Request newRequest = messageFactory.createRequest(inv.getRequestURI(), "CANCEL", (CallIdHeader)inv.getHeader(CallIdHeader.NAME), (CSeqHeader)inv.getHeader(CSeqHeader.NAME), (FromHeader)inv.getHeader(FromHeader.NAME), (ToHeader)inv.getHeader(ToHeader.NAME), null, (MaxForwardsHeader)inv.getHeader(MaxForwardsHeader.NAME));

inv.addHeader(via);