/* $Id$ */
/*
 ** Copyright (C) 2014-2015 Cisco and/or its affiliates. All rights reserved.
 * ** Copyright (C) 2005-2013 Sourcefire, Inc.
 * ** AUTHOR: Steven Sturges
 * **
 * ** This program is free software; you can redistribute it and/or modify
 * ** it under the terms of the GNU General Public License Version 2 as
 * ** published by the Free Software Foundation.  You may not use, modify or
 * ** distribute this program under any other version of the GNU General
 * ** Public License.
 * **
 * ** 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 * */

/* sip_common.h
 *
 * Purpose: Common SIP Definition shared between preprocessors.
 *
 * Arguments:
 *
 * Effect:
 *
 * Comments:
 *
 * Any comments?
 *
 */

#ifndef SIP_COMMON_H_
#define SIP_COMMON_H_

typedef enum _SIP_method
{
	SIP_METHOD_NULL        = 0, //0x0000,
	SIP_METHOD_INVITE      = 1, //0x0001,
	SIP_METHOD_CANCEL      = 2, //0x0002,
	SIP_METHOD_ACK         = 3, //0x0004,
	SIP_METHOD_BYE         = 4, //0x0008,
	SIP_METHOD_REGISTER    = 5, //0x0010,
	SIP_METHOD_OPTIONS     = 6, //0x0020,
	SIP_METHOD_REFER       = 7, //0x0040,
	SIP_METHOD_SUBSCRIBE   = 8, //0x0080,
	SIP_METHOD_UPDATE      = 9, //0x0100,
	SIP_METHOD_JOIN        = 10,//0x0200,
	SIP_METHOD_INFO        = 11,//0x0400,
	SIP_METHOD_MESSAGE     = 12,//0x0800,
	SIP_METHOD_NOTIFY      = 13,//0x1000,
	SIP_METHOD_PRACK       = 14,//0x2000,
	SIP_METHOD_USER_DEFINE = 15,//0x4000,
	SIP_METHOD_USER_DEFINE_MAX = 32//0x80000000,

} SIPMethodsFlag;

typedef struct _SipHeaders
{
    const char *callid;
    const char *from;
    const char *userAgent;
    const char *server;
    const char *userName;
    uint16_t callidLen;
    uint16_t fromLen;
    uint16_t userAgentLen;
    uint16_t serverLen;
    uint16_t userNameLen;

    SIPMethodsFlag methodFlag;
} SipHeaders;

typedef enum _SIP_DialogState
{
   SIP_DLG_CREATE = 1,    //1
   SIP_DLG_INVITING,      //2
   SIP_DLG_EARLY,         //3
   SIP_DLG_AUTHENCATING,  //4
   SIP_DLG_ESTABLISHED,   //5
   SIP_DLG_REINVITING,    //6
   SIP_DLG_TERMINATING,   //7
   SIP_DLG_TERMINATED     //8
} SIP_DialogState;

typedef struct _SIP_MediaData
{
	sfaddr_t maddress;  // media IP
	uint16_t mport;   // media port
	uint8_t numPort;   // number of media ports
	struct _SIP_MediaData *nextM;
} SIP_MediaData;

typedef SIP_MediaData* SIP_MediaDataList;

typedef struct _SIP_MediaSession
{
	uint32_t sessionID; // a hash value of the session
	int savedFlag;      // whether this data has been saved by a dialog,
	                    // if savedFlag = 1, this session will be deleted after sip message is processed.
	sfaddr_t maddress_default;  //Default media IP
	SIP_MediaDataList medias; //Media list in the session
	struct _SIP_MediaSession *nextS; // Next media session
} SIP_MediaSession;

typedef SIP_MediaSession* SIP_MediaList;

typedef struct _SipDialog
{
    SIP_DialogState state;
	SIP_MediaList mediaSessions;
    bool          mediaUpdated;
} SipDialog;

typedef struct _SipEventData
{
    SFSnortPacket *packet;
    const SipHeaders *headers;
    const SipDialog  *dialog;
} SipEventData;

typedef enum _SipEventType
{
    SIP_EVENT_TYPE_SIP_DIALOG
} SipEventType;

#endif /* SIP_COMMON_H_ */
