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diff --git a/src/parser/response.h b/src/parser/response.h
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+/*
+    Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    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 for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+// Response
+
+#ifndef _H_RESPONSE
+#define _H_RESPONSE
+
+#include <string>
+#include "sip_message.h"
+
+using namespace std;
+
+// Repsonse codes
+// Informational
+#define	R_100_TRYING 100
+#define	R_180_RINGING 180
+#define	R_181_CALL_IS_BEING_FORWARDED 181
+#define	R_182_QUEUED 182
+#define	R_183_SESSION_PROGRESS 183
+
+// Success
+#define	R_200_OK 200
+#define R_202_ACCEPTED 202
+
+// Redirection
+#define	R_300_MULTIPLE_CHOICES 300
+#define	R_301_MOVED_PERMANENTLY 301
+#define	R_302_MOVED_TEMPORARILY 302
+#define	R_305_USE_PROXY 305
+#define	R_380_ALTERNATIVE_SERVICE 380
+
+// Client error
+#define	R_400_BAD_REQUEST 400
+#define	R_401_UNAUTHORIZED 401
+#define	R_402_PAYMENT_REQUIRED 402
+#define	R_403_FORBIDDEN 403
+#define	R_404_NOT_FOUND 404
+#define	R_405_METHOD_NOT_ALLOWED 405
+#define	R_406_NOT_ACCEPTABLE 406
+#define	R_407_PROXY_AUTH_REQUIRED 407
+#define	R_408_REQUEST_TIMEOUT 408
+#define	R_410_GONE 410
+#define R_412_CONDITIONAL_REQUEST_FAILED 412
+#define	R_413_REQ_ENTITY_TOO_LARGE 413
+#define	R_414_REQ_URI_TOO_LARGE 414
+#define	R_415_UNSUPPORTED_MEDIA_TYPE 415
+#define	R_416_UNSUPPORTED_URI_SCHEME 416
+#define	R_420_BAD_EXTENSION 420
+#define	R_421_EXTENSION_REQUIRED 421
+#define	R_423_INTERVAL_TOO_BRIEF 423
+#define	R_480_TEMP_NOT_AVAILABLE 480
+#define	R_481_TRANSACTION_NOT_EXIST 481
+#define	R_482_LOOP_DETECTED 482
+#define	R_483_TOO_MANY_HOPS 483
+#define	R_484_ADDRESS_INCOMPLETE 484
+#define	R_485_AMBIGUOUS 485
+#define	R_486_BUSY_HERE 486
+#define	R_487_REQUEST_TERMINATED 487
+#define	R_488_NOT_ACCEPTABLE_HERE 488
+#define R_489_BAD_EVENT 489
+#define	R_491_REQUEST_PENDING 491
+#define	R_493_UNDECIPHERABLE 493
+
+// Server error
+#define	R_500_INTERNAL_SERVER_ERROR 500
+#define	R_501_NOT_IMPLEMENTED 501
+#define	R_502_BAD_GATEWAY 502
+#define	R_503_SERVICE_UNAVAILABLE 503
+#define	R_504_SERVER_TIMEOUT 504
+#define	R_505_SIP_VERSION_NOT_SUPPORTED 505
+#define	R_513_MESSAGE_TOO_LARGE 513
+
+// Global failure
+#define	R_600_BUSY_EVERYWHERE 600
+#define	R_603_DECLINE 603
+#define	R_604_NOT_EXIST_ANYWHERE 604
+#define	R_606_NOT_ACCEPTABLE 606
+
+// Response classes
+#define	R_1XX	1	// Informational
+#define	R_2XX	2	// Success
+#define	R_3XX	3	// Redirection
+#define	R_4XX	4	// Client error
+#define	R_5XX	5	// Server error
+#define	R_6XX	6	// Global failure
+
+// Default reason strings
+#define REASON_100 "Trying"
+#define REASON_180 "Ringing"
+#define REASON_181 "Call Is Being Forwarded"
+#define REASON_182 "Queued"
+#define REASON_183 "Session Progress"
+
+#define REASON_200 "OK"
+#define REASON_202 "Accepted"
+
+#define REASON_300 "Multiple Choices"
+#define REASON_301 "Moved Permanently"
+#define REASON_302 "Moved Temporarily"
+#define REASON_305 "Use Proxy"
+#define REASON_380 "Alternative Service"
+
+#define REASON_400 "Bad Request"
+#define REASON_401 "Unauthorized"
+#define REASON_402 "Payment Required"
+#define REASON_403 "Forbidden"
+#define REASON_404 "Not Found"
+#define REASON_405 "Method Not Allowed"
+#define REASON_406 "Not Acceptable"
+#define REASON_407 "Proxy Authentication Required"
+#define REASON_408 "Request Timeout"
+#define REASON_410 "Gone"
+#define REASON_412 "Conditional Request Failed"
+#define REASON_413 "Request Entity Too Large"
+#define REASON_414 "Request-URI Too Large"
+#define REASON_415 "Unsupported Media Type"
+#define REASON_416 "Unsupported URI Scheme"
+#define REASON_420 "Bad Extension"
+#define REASON_421 "Extension Required"
+#define REASON_423 "Interval Too Brief"
+#define REASON_480 "Temporarily Not Available"
+#define REASON_481 "Call Leg/Transaction Does Not Exist"
+#define REASON_482 "Loop Detected"
+#define REASON_483 "Too Many Hops"
+#define REASON_484 "Address Incomplete"
+#define REASON_485 "Ambiguous"
+#define REASON_486 "Busy Here"
+#define REASON_487 "Request Terminated"
+#define REASON_488 "Not Acceptable Here"
+#define REASON_489 "Bad Event"
+#define REASON_491 "Request Pending"
+#define REASON_493 "Undecipherable"
+
+#define REASON_500 "Internal Server Error"
+#define REASON_501 "Not Implemented"
+#define REASON_502 "Bad Gateway"
+#define REASON_503 "Service Unavailable"
+#define REASON_504 "Server Time-out"
+#define REASON_505 "SIP Version Not Supported"
+#define REASON_513 "Message Too Large"
+
+#define REASON_600 "Busy Everywhere"
+#define REASON_603 "Decline"
+#define REASON_604 "Does Not Exist Anywhere"
+#define REASON_606 "Not Acceptable"
+
+// The protocol allows a SIP response to have a non-default reason
+// phrase that gives a more detailed reason.
+
+// RFC 3261 21.4.18
+// Code 480 should have a specific reason phrase
+#define REASON_480_NO_ANSWER			"User not responding"
+
+// RFC 3265 3.2.4
+#define REASON_481_SUBSCRIPTION_NOT_EXIST	"Subscription does not exist"
+
+
+class t_response : public t_sip_message {
+public:
+	int		code;
+	string		reason;
+	
+	/** The source address of the request generating this response. */
+	t_ip_port	src_ip_port_request;
+
+	t_response();
+	t_response(const t_response &r);
+	t_response(int _code, string _reason = "");
+
+	t_msg_type get_type(void) const { return MSG_RESPONSE; }
+
+	// Return the response class 1,2,3,4,5,6
+	int get_class(void) const;
+
+	bool is_provisional(void) const;
+	bool is_final(void) const;
+	bool is_success(void) const;
+
+	string encode(bool add_content_length = true);
+	list<string> encode_env(void);
+	t_sip_message *copy(void) const;
+
+	bool is_valid(bool &fatal, string &reason) const;
+
+	// Returns true if the response is a 401/407 with
+	// the proper authenticate header.
+	bool must_authenticate(void) const;
+	
+	/**
+	 * Get the destination address for sending the response.
+	 * @param ip_port [out] The destination address.
+	 */
+	void get_destination(t_ip_port &ip_port) const;
+	
+	virtual void calc_local_ip(void);
+};
+
+#endif