osip.h

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/*
  The oSIP library implements the Session Initiation Protocol (SIP -rfc3261-)
  Copyright (C) 2001,2002,2003,2004  Aymeric MOIZARD jack@atosc.org
  
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
  
  This library 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
  Lesser General Public License for more details.
  
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/


#ifndef _OSIP_H_
#define _OSIP_H_

#include <osipparser2/osip_const.h>

/* Time-related functions and data types */
#include <osip2/osip_time.h>

#ifdef __sun
#include <sys/types.h>
#endif

#include <osipparser2/osip_parser.h>
#include <osip2/osip_fifo.h>

#ifdef __cplusplus
extern "C"
{
#endif


  typedef enum _state_t
  {
    /* STATES for invite client transaction */
    ICT_PRE_CALLING,
    ICT_CALLING,
    ICT_PROCEEDING,
    ICT_COMPLETED,
    ICT_TERMINATED,

    /* STATES for invite server transaction */
    IST_PRE_PROCEEDING,
    IST_PROCEEDING,
    IST_COMPLETED,
    IST_CONFIRMED,
    IST_TERMINATED,

    /* STATES for NON-invite client transaction */
    NICT_PRE_TRYING,
    NICT_TRYING,
    NICT_PROCEEDING,
    NICT_COMPLETED,
    NICT_TERMINATED,

    /* STATES for NON-invite server transaction */
    NIST_PRE_TRYING,
    NIST_TRYING,
    NIST_PROCEEDING,
    NIST_COMPLETED,
    NIST_TERMINATED,

#ifndef DOXYGEN
    DIALOG_EARLY,
    DIALOG_CONFIRMED,
    DIALOG_CLOSE                /* ?? */
#endif
  }
  state_t;

  typedef enum type_t
  {
    /* TIMEOUT EVENTS for ICT */
    TIMEOUT_A,   
    TIMEOUT_B,   
    TIMEOUT_D,   
    /* TIMEOUT EVENTS for NICT */
    TIMEOUT_E,   
    TIMEOUT_F,   
    TIMEOUT_K,   
    /* TIMEOUT EVENTS for IST */
    TIMEOUT_G,   
    TIMEOUT_H,   
    TIMEOUT_I,   
    /* TIMEOUT EVENTS for NIST */
    TIMEOUT_J,   
    /* FOR INCOMING MESSAGE */
    RCV_REQINVITE,    
    RCV_REQACK,       
    RCV_REQUEST,      
    RCV_STATUS_1XX,   
    RCV_STATUS_2XX,   
    RCV_STATUS_3456XX,
    /* FOR OUTGOING MESSAGE */
    SND_REQINVITE,    
    SND_REQACK,       
    SND_REQUEST,      
    SND_STATUS_1XX,   
    SND_STATUS_2XX,   
    SND_STATUS_3456XX,
    KILL_TRANSACTION, 
    UNKNOWN_EVT
  }
  type_t;

  typedef enum osip_fsm_type_t
  {
    ICT, 
    IST, 
    NICT,
    NIST 
  }
  osip_fsm_type_t;

#ifndef DEFAULT_T1

#define DEFAULT_T1 500          /* 500 ms */
#endif
#ifndef DEFAULT_T2

#define DEFAULT_T2 4000         /* 4s */
#endif
#ifndef DEFAULT_T4

#define DEFAULT_T4 5000         /* 5s */
#endif


  typedef struct osip_ict osip_ict_t;

  struct osip_ict
  {
    int timer_a_length;           
    struct timeval timer_a_start; 
    int timer_b_length;           
    struct timeval timer_b_start; 
    int timer_d_length;           
    struct timeval timer_d_start; 
    char *destination;            
    int port;                     
  };

  typedef struct osip_nict osip_nict_t;

  struct osip_nict
  {
    int timer_e_length;           
    struct timeval timer_e_start; 
    int timer_f_length;           
    struct timeval timer_f_start; 
    int timer_k_length;           
    struct timeval timer_k_start; 
    char *destination;            
    int port;                     
  };

  typedef struct osip_ist osip_ist_t;

  struct osip_ist
  {
    int timer_g_length;      
    struct timeval timer_g_start; 
    int timer_h_length;           
    struct timeval timer_h_start; 
    int timer_i_length;           
    struct timeval timer_i_start; 
  };

  typedef struct osip_nist osip_nist_t;

  struct osip_nist
  {
    int timer_j_length;            
    struct timeval timer_j_start;  
  };

  typedef struct osip_transaction osip_transaction_t;

  struct osip_transaction
  {

    void *your_instance;        
    int transactionid;          
    osip_fifo_t *transactionff; 
    osip_via_t *topvia;         
    osip_from_t *from;          
    osip_to_t *to;              
    osip_call_id_t *callid;     
    osip_cseq_t *cseq;          
    osip_message_t *orig_request;  
    osip_message_t *last_response; 
    osip_message_t *ack;           
    state_t state;              
    time_t birth_time;          
    time_t completed_time;      
    int in_socket;              
    int out_socket;             
    void *config;               
    osip_fsm_type_t ctx_type;   
    osip_ict_t *ict_context;    
    osip_ist_t *ist_context;    
    osip_nict_t *nict_context;  
    osip_nist_t *nist_context;  
  };


  typedef enum osip_message_callback_type
  {
    OSIP_ICT_INVITE_SENT = 0,               
    OSIP_ICT_INVITE_SENT_AGAIN,             
    OSIP_ICT_ACK_SENT,                      
    OSIP_ICT_ACK_SENT_AGAIN,                
    OSIP_ICT_STATUS_1XX_RECEIVED,           
    OSIP_ICT_STATUS_2XX_RECEIVED,           
    OSIP_ICT_STATUS_2XX_RECEIVED_AGAIN,     
    OSIP_ICT_STATUS_3XX_RECEIVED,           
    OSIP_ICT_STATUS_4XX_RECEIVED,           
    OSIP_ICT_STATUS_5XX_RECEIVED,           
    OSIP_ICT_STATUS_6XX_RECEIVED,           
    OSIP_ICT_STATUS_3456XX_RECEIVED_AGAIN,  
    OSIP_IST_INVITE_RECEIVED,               
    OSIP_IST_INVITE_RECEIVED_AGAIN,         
    OSIP_IST_ACK_RECEIVED,                  
    OSIP_IST_ACK_RECEIVED_AGAIN,            
    OSIP_IST_STATUS_1XX_SENT,               
    OSIP_IST_STATUS_2XX_SENT,               
    OSIP_IST_STATUS_2XX_SENT_AGAIN,         
    OSIP_IST_STATUS_3XX_SENT,               
    OSIP_IST_STATUS_4XX_SENT,               
    OSIP_IST_STATUS_5XX_SENT,               
    OSIP_IST_STATUS_6XX_SENT,               
    OSIP_IST_STATUS_3456XX_SENT_AGAIN,      
    OSIP_NICT_REGISTER_SENT,                
    OSIP_NICT_BYE_SENT,                     
    OSIP_NICT_OPTIONS_SENT,                 
    OSIP_NICT_INFO_SENT,                    
    OSIP_NICT_CANCEL_SENT,                  
    OSIP_NICT_NOTIFY_SENT,                  
    OSIP_NICT_SUBSCRIBE_SENT,               
    OSIP_NICT_UNKNOWN_REQUEST_SENT,         
    OSIP_NICT_REQUEST_SENT_AGAIN,           
    OSIP_NICT_STATUS_1XX_RECEIVED,          
    OSIP_NICT_STATUS_2XX_RECEIVED,          
    OSIP_NICT_STATUS_2XX_RECEIVED_AGAIN,    
    OSIP_NICT_STATUS_3XX_RECEIVED,          
    OSIP_NICT_STATUS_4XX_RECEIVED,          
    OSIP_NICT_STATUS_5XX_RECEIVED,          
    OSIP_NICT_STATUS_6XX_RECEIVED,          
    OSIP_NICT_STATUS_3456XX_RECEIVED_AGAIN, 
    OSIP_NIST_REGISTER_RECEIVED,            
    OSIP_NIST_BYE_RECEIVED,                 
    OSIP_NIST_OPTIONS_RECEIVED,             
    OSIP_NIST_INFO_RECEIVED,                
    OSIP_NIST_CANCEL_RECEIVED,              
    OSIP_NIST_NOTIFY_RECEIVED,              
    OSIP_NIST_SUBSCRIBE_RECEIVED,           
    OSIP_NIST_UNKNOWN_REQUEST_RECEIVED,     
    OSIP_NIST_REQUEST_RECEIVED_AGAIN,       
    OSIP_NIST_STATUS_1XX_SENT,              
    OSIP_NIST_STATUS_2XX_SENT,              
    OSIP_NIST_STATUS_2XX_SENT_AGAIN,        
    OSIP_NIST_STATUS_3XX_SENT,              
    OSIP_NIST_STATUS_4XX_SENT,              
    OSIP_NIST_STATUS_5XX_SENT,              
    OSIP_NIST_STATUS_6XX_SENT,              
    OSIP_NIST_STATUS_3456XX_SENT_AGAIN,     
    OSIP_MESSAGE_CALLBACK_COUNT             
  } osip_message_callback_type_t;

  typedef enum osip_kill_callback_type
  {
    OSIP_ICT_KILL_TRANSACTION,      
    OSIP_IST_KILL_TRANSACTION,      
    OSIP_NICT_KILL_TRANSACTION,     
    OSIP_NIST_KILL_TRANSACTION,     
    OSIP_KILL_CALLBACK_COUNT        
  } osip_kill_callback_type_t;

  typedef enum osip_transport_error_callback_type
  {
    OSIP_ICT_TRANSPORT_ERROR,             
    OSIP_IST_TRANSPORT_ERROR,             
    OSIP_NICT_TRANSPORT_ERROR,            
    OSIP_NIST_TRANSPORT_ERROR,            
    OSIP_TRANSPORT_ERROR_CALLBACK_COUNT   
  } osip_transport_error_callback_type_t;

  typedef void (*osip_message_cb_t) (int type, osip_transaction_t *,
                                     osip_message_t *);
  typedef void (*osip_kill_transaction_cb_t) (int type, osip_transaction_t *);
  typedef void (*osip_transport_error_cb_t) (int type, osip_transaction_t *,
                                             int error);


  struct osip_dialog;

  typedef struct ixt_t ixt_t;

  struct ixt_t
  {
    /* any ACK received that match this context will set counter to -1 */
    struct osip_dialog *dialog; 
    osip_message_t *msg2xx;     
    osip_message_t *ack;        
    time_t start;               
    int interval;               
    char *dest;                 
    int port;                   
    int sock;                   
    int counter;                
  };


  typedef struct osip osip_t;

  struct osip
  {

    void *application_context;  
    /* list of transactions for ict, ist, nict, nist */
    osip_list_t *osip_ict_transactions;  
    osip_list_t *osip_ist_transactions;  
    osip_list_t *osip_nict_transactions; 
    osip_list_t *osip_nist_transactions; 
    osip_list_t *ixt_retransmissions;    
    osip_message_cb_t msg_callbacks[OSIP_MESSAGE_CALLBACK_COUNT];        
    osip_kill_transaction_cb_t kill_callbacks[OSIP_KILL_CALLBACK_COUNT]; 
    osip_transport_error_cb_t tp_error_callbacks[OSIP_TRANSPORT_ERROR_CALLBACK_COUNT];  
    int (*cb_send_message) (osip_transaction_t *, osip_message_t *, char *,
                            int, int);  
  };

  int osip_set_message_callback (osip_t *osip, int type, osip_message_cb_t cb);

  int osip_set_kill_transaction_callback (osip_t *osip, int type,
                                          osip_kill_transaction_cb_t cb);

  int osip_set_transport_error_callback (osip_t *osip, int type,
                                         osip_transport_error_cb_t cb);

  typedef struct osip_event osip_event_t;

  struct osip_event
  {
    type_t type;             
    int transactionid;       
    osip_message_t *sip;     
  };



  int osip_transaction_init (osip_transaction_t ** transaction,
                             osip_fsm_type_t ctx_type, osip_t * osip,
                             osip_message_t * request);
  int osip_transaction_free (osip_transaction_t * transaction);
  int osip_transaction_free2 (osip_transaction_t * transaction);

  void osip_response_get_destination (osip_message_t * response,
                                      char **address,
                                      int *portnum);
  int osip_ict_set_destination (osip_ict_t * ict, char *destination,
                                int port);

  int osip_nict_set_destination (osip_nict_t * nict, char *destination,
                                 int port);

  int osip_transaction_add_event (osip_transaction_t * transaction,
                                  osip_event_t * evt);
  int osip_transaction_execute (osip_transaction_t * transaction,
                                osip_event_t * evt);
  int osip_transaction_set_your_instance (osip_transaction_t * transaction,
                                          void *instance);
  void *osip_transaction_get_your_instance (osip_transaction_t * transaction);

  int osip_transaction_get_destination (osip_transaction_t * transaction,
                                        char **ip, int *port);


  int osip_transaction_set_in_socket (osip_transaction_t * transaction,
                                      int sock);
  int osip_transaction_set_out_socket (osip_transaction_t * transaction,
                                       int sock);



  int osip_init (osip_t ** osip);
  void osip_release (osip_t * osip);

  void osip_set_application_context (osip_t * osip, void *pointer);

  void *osip_get_application_context (osip_t * osip);


  int osip_remove_transaction (osip_t * osip, osip_transaction_t * ict);


  int osip_ict_execute (osip_t * osip);
  int osip_ist_execute (osip_t * osip);
  int osip_nict_execute (osip_t * osip);
  int osip_nist_execute (osip_t * osip);

  void osip_timers_gettimeout (osip_t * osip, struct timeval *lower_tv);

  void osip_timers_ict_execute (osip_t * osip);
  void osip_timers_ist_execute (osip_t * osip);
  void osip_timers_nict_execute (osip_t * osip);
  void osip_timers_nist_execute (osip_t * osip);

/* Take care of mutlithreading issuewhile using this method */
  osip_transaction_t *osip_transaction_find (osip_list_t * transactions,
                                             osip_event_t * evt);


#ifndef DOXYGEN

#ifndef OSIP_MT
  osip_transaction_t *osip_find_transaction (osip_t * osip,
                                             osip_event_t * evt);
#endif

  osip_transaction_t *__osip_find_transaction (osip_t * osip,
                                               osip_event_t * evt,
                                               int consume);
#endif

  int osip_find_transaction_and_add_event (osip_t * osip, osip_event_t * evt);

  osip_transaction_t *osip_create_transaction (osip_t * osip,
                                               osip_event_t * evt);

  osip_event_t *osip_parse (const char *buf, size_t length);


  void osip_retransmissions_execute (osip_t * osip);

  void osip_start_200ok_retransmissions (osip_t * osip,
                                         struct osip_dialog *dialog,
                                         osip_message_t * msg200ok, int sock);

  void osip_start_ack_retransmissions (osip_t * osip,
                                       struct osip_dialog *dialog,
                                       osip_message_t * ack, char *dest,
                                       int port, int sock);

  struct osip_dialog *osip_stop_200ok_retransmissions (osip_t * osip, osip_message_t * ack);

  void osip_stop_retransmissions_from_dialog (osip_t * osip,
                                              struct osip_dialog *dialog);


  osip_event_t *osip_new_outgoing_sipmessage (osip_message_t * sip);

  void osip_event_free (osip_event_t * event);

  void osip_set_cb_send_message (osip_t * cf,
                                 int (*cb) (osip_transaction_t *,
                                            osip_message_t *, char *,
                                            int, int));

/* FOR INCOMING TRANSACTION */
#define EVT_IS_RCV_INVITE(event)       (event->type==RCV_REQINVITE)

#define EVT_IS_RCV_ACK(event)          (event->type==RCV_REQACK)

#define EVT_IS_RCV_REQUEST(event)      (event->type==RCV_REQUEST)

#define EVT_IS_RCV_STATUS_1XX(event)   (event->type==RCV_STATUS_1XX)

#define EVT_IS_RCV_STATUS_2XX(event)   (event->type==RCV_STATUS_2XX)

#define EVT_IS_RCV_STATUS_3456XX(event)   (event->type==RCV_STATUS_3456XX)


/* FOR OUTGOING TRANSACTION */
#define EVT_IS_SND_INVITE(event)       (event->type==SND_REQINVITE)

#define EVT_IS_SND_ACK(event)          (event->type==SND_REQACK)

#define EVT_IS_SND_REQUEST(event)      (event->type==SND_REQUEST)

#define EVT_IS_SND_STATUS_1XX(event)   (event->type==SND_STATUS_1XX)

#define EVT_IS_SND_STATUS_2XX(event)   (event->type==SND_STATUS_2XX)

#define EVT_IS_SND_STATUS_3456XX(event)   (event->type==SND_STATUS_3456XX)

#define EVT_IS_INCOMINGMSG(event)      (event->type>=RCV_REQINVITE \
                                       &&event->type<=RCV_STATUS_3456XX)

#define EVT_IS_INCOMINGREQ(event)      (EVT_IS_RCV_INVITE(event) \
                                       ||EVT_IS_RCV_ACK(event) \
                                       ||EVT_IS_RCV_REQUEST(event))

#define EVT_IS_INCOMINGRESP(event)     (EVT_IS_RCV_STATUS_1XX(event) \
                                       ||EVT_IS_RCV_STATUS_2XX(event) \
                                       ||EVT_IS_RCV_STATUS_3456XX(event))

#define EVT_IS_OUTGOINGMSG(event)      (event->type>=SND_REQINVITE \
                                       &&event->type<=SND_STATUS_3456XX)

#define EVT_IS_OUTGOINGREQ(event)      (EVT_IS_SND_INVITE(event) \
                                       ||EVT_IS_SND_ACK(event) \
                                       ||EVT_IS_SND_REQUEST(event))

#define EVT_IS_OUTGOINGRESP(event)     (EVT_IS_SND_STATUS_1XX(event) \
                                       ||EVT_IS_SND_STATUS_2XX(event) \
                                       ||EVT_IS_SND_STATUS_3456XX(event))

#define EVT_IS_MSG(event)              (event->type>=RCV_REQINVITE \
                                       &&event->type<=SND_STATUS_3456XX)

#define EVT_IS_KILL_TRANSACTION(event) (event->type==KILL_TRANSACTION)

#ifdef __cplusplus
}
#endif


#endif

---