/** Set the default values in the request URI if necessary. */
protected void setDefaults() {
// The request line may be unparseable (set to null by the
// exception handler.
if (requestLine == null) return;
String method = requestLine.getMethod();
// The requestLine may be malformed!
if (method == null) return;
GenericURI u = (GenericURI) requestLine.getUri();
if (u == null) return;
if (method.compareTo(Request.REGISTER) == 0 || method.compareTo(Request.INVITE) == 0) {
if (u instanceof SipUri) {
SipUri sipUri = (SipUri) u;
sipUri.setUserParam(DEFAULT_USER);
try {
sipUri.setTransportParam(DEFAULT_TRANSPORT);
} catch (ParseException ex) {
}
}
}
}
/**
* Check header for constraints. (1) Invite options and bye requests can only have SIP URIs in the
* contact headers. (2) Request must have cseq, to and from and via headers. (3) Method in request
* URI must match that in CSEQ.
*/
public void checkHeaders() throws ParseException {
String prefix = "Missing a required header : ";
/* Check for required headers */
if (getCSeq() == null) {
throw new ParseException(prefix + CSeqHeader.NAME, 0);
}
if (getTo() == null) {
throw new ParseException(prefix + ToHeader.NAME, 0);
}
if (this.callIdHeader == null
|| this.callIdHeader.getCallId() == null
|| callIdHeader.getCallId().equals("")) {
throw new ParseException(prefix + CallIdHeader.NAME, 0);
}
if (getFrom() == null) {
throw new ParseException(prefix + FromHeader.NAME, 0);
}
if (getViaHeaders() == null) {
throw new ParseException(prefix + ViaHeader.NAME, 0);
}
if (getMaxForwards() == null) {
throw new ParseException(prefix + MaxForwardsHeader.NAME, 0);
}
if (getTopmostVia() == null) throw new ParseException("No via header in request! ", 0);
if (getMethod().equals(Request.NOTIFY)) {
if (getHeader(SubscriptionStateHeader.NAME) == null)
throw new ParseException(prefix + SubscriptionStateHeader.NAME, 0);
if (getHeader(EventHeader.NAME) == null)
throw new ParseException(prefix + EventHeader.NAME, 0);
} else if (getMethod().equals(Request.PUBLISH)) {
/*
* For determining the type of the published event state, the EPA MUST include a
* single Event header field in PUBLISH requests. The value of this header field
* indicates the event package for which this request is publishing event state.
*/
if (getHeader(EventHeader.NAME) == null)
throw new ParseException(prefix + EventHeader.NAME, 0);
}
/*
* RFC 3261 8.1.1.8 The Contact header field MUST be present and contain exactly one SIP
* or SIPS URI in any request that can result in the establishment of a dialog. For the
* methods defined in this specification, that includes only the INVITE request. For these
* requests, the scope of the Contact is global. That is, the Contact header field value
* contains the URI at which the UA would like to receive requests, and this URI MUST be
* valid even if used in subsequent requests outside of any dialogs.
*
* If the Request-URI or top Route header field value contains a SIPS URI, the Contact
* header field MUST contain a SIPS URI as well.
*/
if (requestLine.getMethod().equals(Request.INVITE)
|| requestLine.getMethod().equals(Request.SUBSCRIBE)
|| requestLine.getMethod().equals(Request.REFER)) {
if (this.getContactHeader() == null) {
// Make sure this is not a target refresh. If this is a target
// refresh its ok not to have a contact header. Otherwise
// contact header is mandatory.
if (this.getToTag() == null) throw new ParseException(prefix + ContactHeader.NAME, 0);
}
if (requestLine.getUri() instanceof SipUri) {
String scheme = ((SipUri) requestLine.getUri()).getScheme();
if ("sips".equalsIgnoreCase(scheme)) {
SipUri sipUri = (SipUri) this.getContactHeader().getAddress().getURI();
if (!sipUri.getScheme().equals("sips")) {
throw new ParseException("Scheme for contact should be sips:" + sipUri, 0);
}
}
}
}
/*
* Contact header is mandatory for a SIP INVITE request.
*/
if (this.getContactHeader() == null
&& (this.getMethod().equals(Request.INVITE)
|| this.getMethod().equals(Request.REFER)
|| this.getMethod().equals(Request.SUBSCRIBE))) {
throw new ParseException("Contact Header is Mandatory for a SIP INVITE", 0);
}
if (requestLine != null
&& requestLine.getMethod() != null
&& getCSeq().getMethod() != null
&& requestLine.getMethod().compareTo(getCSeq().getMethod()) != 0) {
throw new ParseException("CSEQ method mismatch with Request-Line ", 0);
}
}
