/*
* Conditions Of Use
*
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain. As a result, a formal
* license is not needed to use the software.
*
* This software is provided by NIST as a service and is expressly
* provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY. NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
*
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*
* .
*
*/
/*******************************************************************************
* Product of NIST/ITL Advanced Networking Technologies Division (ANTD). *
*******************************************************************************/
package gov.nist.javax.sip.header;
import gov.nist.core.Host;
import gov.nist.core.HostPort;
import gov.nist.core.NameValue;
import gov.nist.core.NameValueList;
import gov.nist.javax.sip.stack.HopImpl;
import javax.sip.InvalidArgumentException;
import javax.sip.address.Hop;
import javax.sip.header.ViaHeader;
import java.text.ParseException;
/**
* Via SIPHeader (these are strung together in a ViaList).
*
* @see ViaList
*
* @version 1.2 $Revision: 1.15 $ $Date: 2009/05/11 18:52:38 $
*
* @author M. Ranganathan <br/>
*
*
*
*/
public class Via
extends ParametersHeader
implements javax.sip.header.ViaHeader, ViaHeaderExt {
/**
* Comment for <code>serialVersionUID</code>
*/
private static final long serialVersionUID = 5281728373401351378L;
/** The branch parameter is included by every forking proxy.
*/
public static final String BRANCH = ParameterNames.BRANCH;
/** The "received" parameter is added only for receiver-added Via Fields.
*/
public static final String RECEIVED = ParameterNames.RECEIVED;
/** The "maddr" paramter is designating the multicast address.
*/
public static final String MADDR = ParameterNames.MADDR;
/** The "TTL" parameter is designating the time-to-live value.
*/
public static final String TTL = ParameterNames.TTL;
/** The RPORT parameter.
*/
public static final String RPORT = ParameterNames.RPORT;
/** sentProtocol field.
*/
protected Protocol sentProtocol;
/** sentBy field.
*/
protected HostPort sentBy;
/**
* comment field
*
* JvB note: RFC3261 does not allow a comment to appear in Via headers, and this
* is not accessible through the API. Suggest removal
*/
protected String comment;
/** Default constructor
*/
public Via() {
super(NAME);
sentProtocol = new Protocol();
}
public boolean equals(Object other) {
if (other==this) return true;
if (other instanceof ViaHeader) {
final ViaHeader o = (ViaHeader) other;
return getProtocol().equalsIgnoreCase( o.getProtocol() )
&& getTransport().equalsIgnoreCase( o.getTransport() )
&& getHost().equalsIgnoreCase( o.getHost() )
&& getPort() == o.getPort()
&& equalParameters( o );
}
return false;
}
/** get the Protocol Version
* @return String
*/
public String getProtocolVersion() {
if (sentProtocol == null)
return null;
else
return sentProtocol.getProtocolVersion();
}
/**
* Accessor for the sentProtocol field.
* @return Protocol field
*/
public Protocol getSentProtocol() {
return sentProtocol;
}
/**
* Accessor for the sentBy field
*@return SentBy field
*/
public HostPort getSentBy() {
return sentBy;
}
/**
* Get the host, port and transport as a Hop. This is
* useful for the stack to avoid duplication of code.
*
*/
public Hop getHop() {
HopImpl hop = new HopImpl(sentBy.getHost().getHostname(),
sentBy.getPort(),sentProtocol.getTransport());
return hop;
}
/**
* Accessor for the parameters field
* @return parameters field
*/
public NameValueList getViaParms() {
return parameters;
}
/**
* Accessor for the comment field.
* @return comment field.
* @deprecated RFC 2543 support feature.
*/
public String getComment() {
return comment;
}
/** port of the Via Header.
* @return true if Port exists.
*/
public boolean hasPort() {
return (getSentBy()).hasPort();
}
/** comment of the Via Header.
*
* @return false if comment does not exist and true otherwise.
*/
public boolean hasComment() {
return comment != null;
}
/** remove the port.
*/
public void removePort() {
sentBy.removePort();
}
/** remove the comment field.
*/
public void removeComment() {
comment = null;
}
/** set the Protocol Version
* @param protocolVersion String to set
*/
public void setProtocolVersion(String protocolVersion) {
if (sentProtocol == null)
sentProtocol = new Protocol();
sentProtocol.setProtocolVersion(protocolVersion);
}
/** set the Host of the Via Header
* @param host String to set
*/
public void setHost(Host host) {
if (sentBy == null) {
sentBy = new HostPort();
}
sentBy.setHost(host);
}
/**
* Set the sentProtocol member
* @param s Protocol to set.
*/
public void setSentProtocol(Protocol s) {
sentProtocol = s;
}
/**
* Set the sentBy member
* @param s HostPort to set.
*/
public void setSentBy(HostPort s) {
sentBy = s;
}
/**
* Set the comment member
* @param c String to set.
* @deprecated This is an RFC 2543 feature.
*/
public void setComment(String c) {
comment = c;
}
/** Encode the body of this header (the stuff that follows headerName).
* A.K.A headerValue.
*/
protected String encodeBody() {
return encodeBody(new StringBuffer()).toString();
}
protected StringBuffer encodeBody(StringBuffer buffer) {
sentProtocol.encode(buffer);
buffer.append(SP);
sentBy.encode(buffer);
if (!parameters.isEmpty()) {
buffer.append(SEMICOLON);
parameters.encode(buffer);
}
if (comment != null) {
buffer.append(SP).append(LPAREN).append(comment).append(RPAREN);
}
return buffer;
}
/**
* Set the host part of this ViaHeader to the newly supplied <code>host</code>
* parameter.
*
* @throws ParseException which signals that an error has been reached
* unexpectedly while parsing the host value.
*/
public void setHost(String host) throws ParseException {
if (sentBy == null)
sentBy = new HostPort();
try {
Host h = new Host(host);
sentBy.setHost(h);
} catch (Exception e) {
throw new NullPointerException(" host parameter is null");
}
}
/**
* Returns the host part of this ViaHeader.
*
* @return the string value of the host
*/
public String getHost() {
if (sentBy == null)
return null;
else {
Host host = sentBy.getHost();
if (host == null)
return null;
else
return host.getHostname();
}
}
/**
* Set the port part of this ViaHeader to the newly supplied <code>port</code>
* parameter.
*
* @param port - the new integer value of the port of this ViaHeader
*/
public void setPort(int port) throws InvalidArgumentException {
if ( port!=-1 && (port<1 || port>65535)) {
throw new InvalidArgumentException( "Port value out of range -1, [1..65535]" );
}
if (sentBy == null)
sentBy = new HostPort();
sentBy.setPort(port);
}
/**
* Set the RPort flag parameter
*/
public void setRPort(){
try {
this.setParameter(Via.RPORT,"");
} catch (ParseException e) {
e.printStackTrace(); // should not occur
}
}
/**
* Returns the port part of this ViaHeader.
*
* @return the integer value of the port
*/
public int getPort() {
if (sentBy == null)
return -1;
return sentBy.getPort();
}
/**
* Return the rport parameter.
*
*@return the rport parameter or -1.
*/
public int getRPort() {
String strRport = getParameter(ParameterNames.RPORT);
if (strRport != null && ! strRport.equals(""))
return new Integer(strRport).intValue();
else
return -1;
}
/**
* Returns the value of the transport parameter.
*
* @return the string value of the transport paramter of the ViaHeader
*/
public String getTransport() {
if (sentProtocol == null)
return null;
return sentProtocol.getTransport();
}
/**
* Sets the value of the transport. This parameter specifies
* which transport protocol to use for sending requests and responses to
* this entity. The following values are defined: "udp", "tcp", "sctp",
* "tls", but other values may be used also.
*
* @param transport - new value for the transport parameter
* @throws ParseException which signals that an error has been reached
* unexpectedly while parsing the transport value.
*/
public void setTransport(String transport) throws ParseException {
if (transport == null)
throw new NullPointerException(
"JAIN-SIP Exception, "
+ "Via, setTransport(), the transport parameter is null.");
if (sentProtocol == null)
sentProtocol = new Protocol();
sentProtocol.setTransport(transport);
}
/**
* Returns the value of the protocol used.
*
* @return the string value of the protocol paramter of the ViaHeader
*/
public String getProtocol() {
if (sentProtocol == null)
return null;
return sentProtocol.getProtocol(); // JvB: Return name ~and~ version
}
/**
* Sets the value of the protocol parameter. This parameter specifies
* which protocol is used, for example "SIP/2.0".
*
* @param protocol - new value for the protocol parameter
* @throws ParseException which signals that an error has been reached
* unexpectedly while parsing the protocol value.
*/
public void setProtocol(String protocol) throws ParseException {
if (protocol == null)
throw new NullPointerException(
"JAIN-SIP Exception, "
+ "Via, setProtocol(), the protocol parameter is null.");
if (sentProtocol == null)
sentProtocol = new Protocol();
sentProtocol.setProtocol(protocol);
}
/**
* Returns the value of the ttl parameter, or -1 if this is not set.
*
* @return the integer value of the <code>ttl</code> parameter
*/
public int getTTL() {
int ttl = getParameterAsInt(ParameterNames.TTL);
return ttl;
}
/**
* Sets the value of the ttl parameter. The ttl parameter specifies the
* time-to-live value when packets are sent using UDP multicast.
*
* @param ttl - new value of the ttl parameter
* @throws InvalidArgumentException if supplied value is less than zero or
* greater than 255, excluding -1 the default not set value.
*/
public void setTTL(int ttl) throws InvalidArgumentException {
if (ttl < 0 && ttl != -1)
throw new InvalidArgumentException(
"JAIN-SIP Exception"
+ ", Via, setTTL(), the ttl parameter is < 0");
setParameter(new NameValue(ParameterNames.TTL, new Integer(ttl)));
}
/**
* Returns the value of the <code>maddr</code> parameter, or null if this
* is not set.
*
* @return the string value of the maddr parameter
*/
public String getMAddr() {
return getParameter(ParameterNames.MADDR);
}
/**
* Sets the value of the <code>maddr</code> parameter of this ViaHeader. The
* maddr parameter indicates the server address to be contacted for this
* user, overriding any address derived from the host field.
*
* @param mAddr new value of the <code>maddr</code> parameter
* @throws ParseException which signals that an error has been reached
* unexpectedly while parsing the mAddr value.
*/
public void setMAddr(String mAddr) throws ParseException {
if (mAddr == null)
throw new NullPointerException(
"JAIN-SIP Exception, "
+ "Via, setMAddr(), the mAddr parameter is null.");
Host host = new Host();
host.setAddress(mAddr);
NameValue nameValue = new NameValue(ParameterNames.MADDR, host);
setParameter(nameValue);
}
/**
* Gets the received paramater of the ViaHeader. Returns null if received
* does not exist.
*
* @return the string received value of ViaHeader
*/
public String getReceived() {
return getParameter(ParameterNames.RECEIVED);
}
/**
* Sets the received parameter of ViaHeader.
*
* @param received - the newly supplied received parameter.
* @throws ParseException which signals that an error has been reached
* unexpectedly while parsing the received value.
*/
public void setReceived(String received) throws ParseException {
if (received == null)
throw new NullPointerException(
"JAIN-SIP Exception, "
+ "Via, setReceived(), the received parameter is null.");
setParameter(ParameterNames.RECEIVED, received);
}
/**
* Gets the branch paramater of the ViaHeader. Returns null if branch
* does not exist.
*
* @return the string branch value of ViaHeader
*/
public String getBranch() {
return getParameter(ParameterNames.BRANCH);
}
/**
* Sets the branch parameter of the ViaHeader to the newly supplied
* branch value.
*
* @param branch - the new string branch parmameter of the ViaHeader.
* @throws ParseException which signals that an error has been reached
* unexpectedly while parsing the branch value.
*/
public void setBranch(String branch) throws ParseException {
if (branch == null || branch.length()==0)
throw new NullPointerException(
"JAIN-SIP Exception, "
+ "Via, setBranch(), the branch parameter is null or length 0.");
setParameter(ParameterNames.BRANCH, branch);
}
public Object clone() {
Via retval = (Via) super.clone();
if (this.sentProtocol != null)
retval.sentProtocol = (Protocol) this.sentProtocol.clone();
if (this.sentBy != null)
retval.sentBy = (HostPort) this.sentBy.clone();
if ( this.getRPort() != -1)
retval.setParameter(RPORT,this.getRPort());
return retval;
}
/*
* (non-Javadoc)
* @see gov.nist.javax.sip.header.ViaHeaderExt#getSentByField()
*/
public String getSentByField() {
if(sentBy != null)
return sentBy.encode();
return null;
}
/*
* (non-Javadoc)
* @see gov.nist.javax.sip.header.ViaHeaderExt#getSentProtocolField()
*/
public String getSentProtocolField() {
if(sentProtocol != null)
return sentProtocol.encode();
return null;
}
}