/*
* Portions Copyright 2000-2007 Sun Microsystems, Inc. All Rights
* Reserved. Use is subject to license terms.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
/*
*/
package gov.nist.siplite.header;
import gov.nist.siplite.parser.*;
import gov.nist.core.*;
/**
* Via Header (these are strung together in a ViaList).
*
* @version JAIN-SIP-1.1
*
*
* <a href="{@docRoot}/uncopyright.html">This code is in the public domain.</a>
*
*/
public class ViaHeader extends gov.nist.siplite.header.ParametersHeader {
/** Class handle. */
public static Class clazz;
/** Via header field label. */
public static final String NAME = Header.VIA;
/**
* The branch parameter is included by every forking proxy.
*/
public static final String BRANCH = "branch";
/**
* The "hidden" paramter is included if this header field
* was hidden by the upstream proxy.
*/
public static final String HIDDEN = "hidden";
/**
* The "received" parameter is added only for receiver-added Via Fields.
*/
public static final String RECEIVED = "received";
/**
* The "maddr" parameter is designating the multicast address.
*/
public static final String MADDR = "maddr";
/**
* The "TTL" parameter is designating the time-to-live value.
*/
public static final String TTL = "ttl";
/**
* Sent protocol field.
*/
protected Protocol sentProtocol;
/**
* Sent by field.
*/
protected HostPort sentBy;
/**
* Comment field.
*/
protected String comment;
static {
clazz = new ViaHeader().getClass();
}
/**
* Default constructor.
*/
public ViaHeader() {
super(VIA);
this.sentBy = new HostPort();
sentProtocol = new Protocol();
}
/**
* Compares two via headers for equaltiy.
* @param other Object to set.
* @return true if the two via headers are the same.
*/
public boolean equals(Object other) {
if (! this.getClass().equals(other.getClass())) {
return false;
}
ViaHeader that = (ViaHeader) other;
if (! this.sentProtocol.equals(that.sentProtocol)) {
return false;
}
if (! this.parameters.equals(that.parameters)) {
return false;
}
if (! this.sentBy.equals(that.sentBy)) {
return false;
}
return true;
}
/**
* Encodes the via header into a cannonical string.
* @return String containing cannonical encoding of via header.
*/
public String encodeBody() {
String encoding = "";
encoding += sentProtocol.encode() + Separators.SP + sentBy.encode();
// Add the default port if there is no port specified.
if (! sentBy.hasPort()) encoding += Separators.COLON + "5060";
if (comment != null) {
encoding += Separators.LPAREN + comment + Separators.RPAREN;
}
encoding += encodeWithSep();
return encoding;
}
/**
* Gets 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;
}
/**
* Gest the host name. (null if not yet set).
* @return host name from the via header.
*/
public String getHost() {
if (sentBy == null)
return null;
else {
Host host = sentBy.getHost();
if (host == null)
return null;
else return host.getHostname();
}
}
/**
* Port of the Via header.
* @return port field.
*/
public int getPort() {
if (sentBy == null)
return -1;
return sentBy.getPort();
}
/**
* Port of the Via Header.
* @return true if Port exists.
*/
public boolean hasPort() {
if (sentBy == null)
return false;
return (getSentBy()).hasPort();
}
/**
* Accessor for the comment field.
* @return comment field.
*/
public String getComment() {
return comment;
}
/**
* Gets the Branch parameter if it exists.
* @return Branch field.
*/
public String getBranch() {
return super.getParameter(ViaHeader.BRANCH);
}
/**
* Gets the received parameter if it exists.
* @return received parameter.
*/
public String getReceived() {
return super.getParameter(ViaHeader.RECEIVED);
}
/**
* Gets the maddr parameter if it exists.
* @return maddr parameter.
*/
public String getMaddr() {
return super.getParameter(ViaHeader.MADDR);
}
/**
* get the ttl parameter if it exists.
* @return ttl parameter.
*/
public String getTTL() {
return super.getParameter(ViaHeader.TTL);
}
/**
* Comment of the Via Header.
*
* @return false if comment does not exist and true otherwise.
*/
public boolean hasComment() {
return comment != null;
}
/**
* Removes the comment field.
*/
public void removeComment() {
comment = null;
}
/**
* Sets the Protocol Version.
*
* BNF (RFC3261, p. 222, 232):
* protocol-version = token
*
* @param protocolVersion String to set
*/
public void setProtocolVersion(String protocolVersion) {
if (sentProtocol == null) sentProtocol = new Protocol();
sentProtocol.setProtocolVersion(protocolVersion);
}
/**
* Sets the sentProtocol member
* @param s Protocol to set.
*/
public void setSentProtocol(Protocol s) {
sentProtocol = s;
}
/**
* Sets the transport string.
*
* BNF (RFC3261, p. 222, 232):
* transport = "UDP" / "TCP" / "TLS" / "SCTP" / other-transport
*
* @param transport String to set
*/
public void setTransport(String transport) {
if (sentProtocol == null) sentProtocol = new Protocol();
sentProtocol.setTransport(transport);
}
/**
* Sets the sentBy member
* @param s HostPort to set.
*/
public void setSentBy(HostPort s) {
sentBy = s;
}
/**
* Sets the comment member
* @param c String to set.
*/
public void setComment(String c) {
comment = c;
}
/**
* Clone - do a deep copy.
* @return Object Via
*/
public Object clone() {
ViaHeader retval = new ViaHeader();
if (this.comment != null) retval.comment = new String(this.comment);
if (this.parameters != null) retval.parameters =
(NameValueList) parameters.clone();
if (this.sentBy != null) retval.sentBy = (HostPort)sentBy.clone();
if (this.sentProtocol != null)
retval.sentProtocol = (Protocol)sentProtocol.clone();
return retval;
}
/**
* Gets the value portion of this header (does nto include the parameters).
* @return the via header field value
*/
public Object getValue() {
return sentProtocol.encode() + " " + sentBy.encode();
}
/**
* Sets the header value field (without parameters).
* @param value is the value field to set.
* @throws IllegalArgumentException if the value is invalid.
*/
public void setHeaderValue(String value)
throws IllegalArgumentException {
StringMsgParser smp = new StringMsgParser();
ViaList hl = null;
String strNewHeader = NAME + Separators.COLON + value;
try {
hl = (ViaList)smp.parseHeader(strNewHeader);
} catch (ParseException e) {
throw new IllegalArgumentException(e.toString());
}
if (hl.size() > 1) {
throw new IllegalArgumentException("Ivalid Via header " +
"value: " + value);
}
ViaHeader header = (ViaHeader)hl.elementAt(0);
// Copy the values from the header created from the parsed value
setSentBy(header.getSentBy());
setSentProtocol(header.getSentProtocol());
if (sentProtocol != null) {
setProtocolVersion(header.getProtocolVersion());
setTransport(header.getTransport());
}
if (sentBy != null) {
setHost(header.getHost());
setPort(header.getPort());
}
// IMPL_NOTE:
// System.out.println("new: '" + strNewHeader + "'");
// System.out.println("this: '" + strNewHeader + "'");
}
/**
* This function is overloaded in order to validate the parameters.
* Sets the value of the specified parameter. If the parameter already
* had a value it will be overwritten. A zero-length String indicates flag
* parameter.
*
* IMPL_NOTE: add a support for all parameters that are stored as
* members of this class.
*
* @param name a String specifying the parameter name
* @param value a String specifying the parameter value
* @throws IllegalArgumentException if the parameter's name or its value
* is invalid.
*/
public void setParameter(String name, String value)
throws IllegalArgumentException {
if (name.equalsIgnoreCase(ViaHeader.TTL)) {
setTTL(value);
} else if (name.equalsIgnoreCase(ViaHeader.RECEIVED)) {
setReceived(value);
} else {
super.setParameter(name, value);
}
}
/**
* Sets the 'received' parameter.
*
* BNF (RFC3261, p. 223, 232):
* via-received = "received" EQUAL (IPv4address / IPv6address)
* IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
* IPv6address = hexpart [ ":" IPv4address ]
* hexpart = hexseq / hexseq "::" [ hexseq ] / "::" [ hexseq ]
* hexseq = hex4 *( ":" hex4)
* hex4 = 1*4HEXDIG
*
* @param received the new 'received' value.
* @throws IllegalArgumentException if the new 'received' value is invalid.
*/
public void setReceived(String received) throws IllegalArgumentException {
if (!Lexer.isValidIpv4Address(received) &&
!Lexer.isValidIpv6Address(received)) {
throw new IllegalArgumentException("Invalid IP address");
}
super.setParameter(RECEIVED, received);
}
/**
* Sets the maddr parameter.
*
* BNF (RFC3261, p. 222, 232):
* via-maddr = "maddr" EQUAL host
* host = hostname / IPv4address / IPv6reference
* hostname = *( domainlabel "." ) toplabel [ "." ]
* domainlabel = alphanum / alphanum *( alphanum / "-" ) alphanum
* toplabel = ALPHA / ALPHA *( alphanum / "-" ) alphanum
*
* IPv4address = 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT "." 1*3DIGIT
* IPv6reference = "[" IPv6address "]"
* IPv6address = hexpart [ ":" IPv4address ]
* hexpart = hexseq / hexseq "::" [ hexseq ] / "::" [ hexseq ]
* hexseq = hex4 *( ":" hex4)
* hex4 = 1*4HEXDIG
*
* IMPL_NOTE: check maddr for validity.
* @param maddr the new maddr value.
* @throws IllegalArgumentException if the new maddr value is invalid.
*/
public void setMaddr(String maddr) throws IllegalArgumentException {
super.setParameter(MADDR, maddr);
}
/**
* Sets the ttl parameter.
*
* BNF (RFC3261, p. 232):
* ttl = 1*3DIGIT ; 0 to 255
*
* @param strTTL the new ttl value given in a string form.
* @throws IllegalArgumentException if the new ttl value is invalid.
*/
public void setTTL(String strTTL) throws IllegalArgumentException {
int ttl = 0;
try {
ttl = Integer.parseInt(strTTL);
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Cannot parse TTL '" +
strTTL + "': " + e);
}
if (ttl < 0 || ttl > 255) {
throw new IllegalArgumentException("Invalid TTL: " + strTTL);
}
super.setParameter(TTL, strTTL);
}
/**
* Sets the branch field.
*
* BNF (RFC3261, p. 232):
* via-branch = "branch" EQUAL token
*
* @param branch the new branch value
*/
public void setBranch(String branch) {
super.setParameter(BRANCH, branch);
}
/**
* Sets the host field.
*
* BNF (RFC3261, p. 222):
* host = hostname / IPv4address / IPv6reference
* See setMaddr() for the full BNF.
*
* @param host the new host value
*/
public void setHost(String host) {
this.sentBy.setHost(new Host(host));
}
/**
* Sets the host field.
* @param host the new host value
*/
public void setHost(Host host) {
this.sentBy.setHost(host);
}
/**
* Sets the port field.
*
* BNF (RFC3261, p. 232):
* port = 1*DIGIT
*
* @param port the new port value
*/
public void setPort(int port) {
this.sentBy.setPort(port);
}
/**
* Gets the current transport.
* @return the current transport
*/
public String getTransport() {
if (this.sentProtocol == null)
return null;
else return this.sentProtocol.getTransport();
}
}
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