/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _SIP_DIALOG_H
#define _SIP_DIALOG_H

#ifdef  __cplusplus
extern "C" {
#endif

#include <pthread.h>
#include <sip.h>
#include <sys/types.h>

#include "sip_msg.h"
#include "sip_miscdefs.h"

/*
 * Dialogs are linked in their own list.
 */


/* This is always done within sip_dlg_mutex */
#define SIP_DLG_REFCNT_INCR(dialog)                                     \
        (dialog)->sip_dlg_ref_cnt++;

#define SIP_DLG_REFCNT_DECR(dialog)      {                              \
        (void) pthread_mutex_lock(&((dialog)->sip_dlg_mutex));          \
        assert((dialog)->sip_dlg_ref_cnt > 0);                          \
        (dialog)->sip_dlg_ref_cnt--;                                    \
        if ((dialog)->sip_dlg_ref_cnt == 0 &&                           \
            (dialog)->sip_dlg_state == SIP_DLG_DESTROYED) {             \
                (void) pthread_mutex_unlock(&((dialog)->sip_dlg_mutex)); \
                sip_dialog_delete(dialog);                              \
        } else {                                                        \
                (void) pthread_mutex_unlock(&((dialog)->sip_dlg_mutex));\
        }                                                               \
}

/* The dialog structure */
typedef struct sip_dialog
{
        _sip_header_t           *sip_dlg_remote_uri_tag;
        _sip_header_t           *sip_dlg_local_uri_tag;
        _sip_header_t           *sip_dlg_remote_target;
        _sip_header_t           *sip_dlg_local_contact;
        _sip_header_t           *sip_dlg_new_local_contact; /* for re-INVITE */
        _sip_header_t           *sip_dlg_route_set;
        _sip_header_t           *sip_dlg_event;
        sip_str_t               sip_dlg_rset;
        sip_str_t               sip_dlg_req_uri;
        _sip_header_t           *sip_dlg_call_id;
        uint32_t                sip_dlg_local_cseq;
        uint32_t                sip_dlg_remote_cseq;
        uint16_t                sip_dlg_id[8];
        boolean_t               sip_dlg_secure;
        dialog_state_t          sip_dlg_state;
        int                     sip_dlg_type;   /* CALLEE or CALLER */
        pthread_mutex_t         sip_dlg_mutex;
        uint32_t                sip_dlg_ref_cnt;
        sip_timer_t             sip_dlg_timer;  /* to delete partial dialogs */
        boolean_t               sip_dlg_on_fork;
        sip_method_t            sip_dlg_method;
        void                    *sip_dlg_ctxt;  /* currently unused */
        int                     sip_dlg_msgcnt;
        sip_log_t               sip_dlg_log[SIP_DLG_DESTROYED + 1];
} _sip_dialog_t;

void                    sip_dialog_init(void (*sip_ulp_dlg_del)(sip_dialog_t,
                            sip_msg_t, void *),
                            void (*ulp_dlg_state)(sip_dialog_t, sip_msg_t,
                            int, int));
sip_dialog_t            sip_dialog_create(_sip_msg_t *, _sip_msg_t *, int);
sip_dialog_t            sip_dialog_find(_sip_msg_t *);
int                     sip_dialog_process(_sip_msg_t *, sip_dialog_t *);
sip_dialog_t            sip_update_dialog(sip_dialog_t, _sip_msg_t *);
void                    sip_dialog_add_new_contact(sip_dialog_t, _sip_msg_t *);
void                    sip_dialog_terminate(sip_dialog_t, sip_msg_t);
sip_dialog_t            sip_seed_dialog(sip_conn_object_t, _sip_msg_t *,
                            boolean_t, int);
char                    *sip_dialog_req_uri(sip_dialog_t);
void                    sip_dialog_delete(_sip_dialog_t *);
extern char             *sip_get_dialog_state_str(int);
extern boolean_t        sip_incomplete_dialog(sip_dialog_t);

#ifdef  __cplusplus
}
#endif

#endif  /* _SIP_DIALOG_H */