switch_core_event_hook.h

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/* 
 * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
 * Copyright (C) 2005-2014, Anthony Minessale II <anthm@freeswitch.org>
 *
 * Version: MPL 1.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
 *
 * The Initial Developer of the Original Code is
 * Anthony Minessale II <anthm@freeswitch.org>
 * Portions created by the Initial Developer are Copyright (C)
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 * 
 * Anthony Minessale II <anthm@freeswitch.org>
 *
 * switch_core_event_hook.h Core Event Hooks
 *
 */
#ifndef SWITCH_EVENT_HOOKS_H
#define SWITCH_EVENT_HOOKS_H

#include <switch.h>
SWITCH_BEGIN_EXTERN_C typedef struct switch_io_event_hooks switch_io_event_hooks_t;

typedef struct switch_io_event_hook_outgoing_channel switch_io_event_hook_outgoing_channel_t;
typedef struct switch_io_event_hook_receive_message switch_io_event_hook_receive_message_t;
typedef struct switch_io_event_hook_receive_event switch_io_event_hook_receive_event_t;
typedef struct switch_io_event_hook_read_frame switch_io_event_hook_read_frame_t;
typedef struct switch_io_event_hook_video_read_frame switch_io_event_hook_video_read_frame_t;
typedef struct switch_io_event_hook_write_frame switch_io_event_hook_write_frame_t;
typedef struct switch_io_event_hook_video_write_frame switch_io_event_hook_video_write_frame_t;
typedef struct switch_io_event_hook_kill_channel switch_io_event_hook_kill_channel_t;
typedef struct switch_io_event_hook_send_dtmf switch_io_event_hook_send_dtmf_t;
typedef struct switch_io_event_hook_recv_dtmf switch_io_event_hook_recv_dtmf_t;
typedef struct switch_io_event_hook_state_change switch_io_event_hook_state_change_t;
typedef struct switch_io_event_hook_state_run switch_io_event_hook_state_run_t;
typedef switch_status_t (*switch_outgoing_channel_hook_t)
                (switch_core_session_t *, switch_event_t *, switch_caller_profile_t *, switch_core_session_t *, switch_originate_flag_t);
typedef switch_status_t (*switch_receive_message_hook_t) (switch_core_session_t *, switch_core_session_message_t *);
typedef switch_status_t (*switch_receive_event_hook_t) (switch_core_session_t *, switch_event_t *);
typedef switch_status_t (*switch_read_frame_hook_t) (switch_core_session_t *, switch_frame_t **, switch_io_flag_t, int);
typedef switch_status_t (*switch_video_read_frame_hook_t) (switch_core_session_t *, switch_frame_t **, switch_io_flag_t, int);
typedef switch_status_t (*switch_write_frame_hook_t) (switch_core_session_t *, switch_frame_t *, switch_io_flag_t, int);
typedef switch_status_t (*switch_video_write_frame_hook_t) (switch_core_session_t *, switch_frame_t *, switch_io_flag_t, int);
typedef switch_status_t (*switch_kill_channel_hook_t) (switch_core_session_t *, int);
typedef switch_status_t (*switch_send_dtmf_hook_t) (switch_core_session_t *, const switch_dtmf_t *, switch_dtmf_direction_t direction);
typedef switch_status_t (*switch_recv_dtmf_hook_t) (switch_core_session_t *, const switch_dtmf_t *, switch_dtmf_direction_t direction);
typedef switch_status_t (*switch_state_change_hook_t) (switch_core_session_t *);
typedef switch_status_t (*switch_state_run_hook_t) (switch_core_session_t *);

/*! \brief Node in which to store custom receive message callback hooks */
struct switch_io_event_hook_outgoing_channel {
        switch_outgoing_channel_hook_t outgoing_channel;
        struct switch_io_event_hook_outgoing_channel *next;
};

/*! \brief Node in which to store custom receive message callback hooks */
struct switch_io_event_hook_receive_message {
        switch_receive_message_hook_t receive_message;
        struct switch_io_event_hook_receive_message *next;
};


/*! \brief Node in which to store custom receive message callback hooks */
struct switch_io_event_hook_receive_event {
        /*! the event callback hook */
        switch_receive_event_hook_t receive_event;
        struct switch_io_event_hook_receive_event *next;
};

/*! \brief Node in which to store custom read frame channel callback hooks */
struct switch_io_event_hook_read_frame {
        /*! the read frame channel callback hook */
        switch_read_frame_hook_t read_frame;
        struct switch_io_event_hook_read_frame *next;
};

/*! \brief Node in which to store custom read frame channel callback hooks */
struct switch_io_event_hook_video_read_frame {
        /*! the read frame channel callback hook */
        switch_read_frame_hook_t video_read_frame;
        struct switch_io_event_hook_video_read_frame *next;
};

/*! \brief Node in which to store custom write_frame channel callback hooks */
struct switch_io_event_hook_write_frame {
        /*! the write_frame channel callback hook */
        switch_write_frame_hook_t write_frame;
        struct switch_io_event_hook_write_frame *next;
};

/*! \brief Node in which to store custom video_write_frame channel callback hooks */
struct switch_io_event_hook_video_write_frame {
        /*! the video_write_frame channel callback hook */
        switch_video_write_frame_hook_t video_write_frame;
        struct switch_io_event_hook_video_write_frame *next;
};

/*! \brief Node in which to store custom kill channel callback hooks */
struct switch_io_event_hook_kill_channel {
        /*! the kill channel callback hook */
        switch_kill_channel_hook_t kill_channel;
        struct switch_io_event_hook_kill_channel *next;
};

/*! \brief Node in which to store custom send dtmf channel callback hooks */
struct switch_io_event_hook_send_dtmf {
        /*! the send dtmf channel callback hook */
        switch_send_dtmf_hook_t send_dtmf;
        struct switch_io_event_hook_send_dtmf *next;
};

/*! \brief Node in which to store custom recv dtmf channel callback hooks */
struct switch_io_event_hook_recv_dtmf {
        /*! the recv dtmf channel callback hook */
        switch_recv_dtmf_hook_t recv_dtmf;
        struct switch_io_event_hook_recv_dtmf *next;
};

/*! \brief Node in which to store state change callback hooks */
struct switch_io_event_hook_state_change {
        /*! the state change channel callback hook */
        switch_state_change_hook_t state_change;
        struct switch_io_event_hook_state_change *next;
};

/*! \brief Node in which to store state run callback hooks */
struct switch_io_event_hook_state_run {
        /*! the state run channel callback hook */
        switch_state_run_hook_t state_run;
        struct switch_io_event_hook_state_run *next;
};


/*! \brief A table of lists of io_event_hooks to store the event hooks associated with a session */
struct switch_io_event_hooks {
        /*! a list of outgoing channel hooks */
        switch_io_event_hook_outgoing_channel_t *outgoing_channel;
        /*! a list of receive message hooks */
        switch_io_event_hook_receive_message_t *receive_message;
        /*! a list of queue message hooks */
        switch_io_event_hook_receive_event_t *receive_event;
        /*! a list of read frame hooks */
        switch_io_event_hook_read_frame_t *read_frame;
        /*! a list of video read frame hooks */
        switch_io_event_hook_video_read_frame_t *video_read_frame;
        /*! a list of write frame hooks */
        switch_io_event_hook_write_frame_t *write_frame;
        /*! a list of video write frame hooks */
        switch_io_event_hook_video_write_frame_t *video_write_frame;
        /*! a list of kill channel hooks */
        switch_io_event_hook_kill_channel_t *kill_channel;
        /*! a list of send dtmf hooks */
        switch_io_event_hook_send_dtmf_t *send_dtmf;
        /*! a list of recv dtmf hooks */
        switch_io_event_hook_recv_dtmf_t *recv_dtmf;
        /*! a list of state change hooks */
        switch_io_event_hook_state_change_t *state_change;
        switch_io_event_hook_state_run_t *state_run;
};

extern switch_io_event_hooks_t switch_core_session_get_event_hooks(switch_core_session_t *session);

#define NEW_HOOK_DECL_ADD_P(_NAME) SWITCH_DECLARE(switch_status_t) switch_core_event_hook_add_##_NAME \
                                                                                                                           (switch_core_session_t *session, switch_##_NAME##_hook_t _NAME)

#define NEW_HOOK_DECL_REM_P(_NAME) SWITCH_DECLARE(switch_status_t) switch_core_event_hook_remove_##_NAME \
                                                                                                                                   (switch_core_session_t *session, switch_##_NAME##_hook_t _NAME)

#define NEW_HOOK_DECL(_NAME) NEW_HOOK_DECL_ADD_P(_NAME)                                 \
        {                                                                                                                                       \
                switch_io_event_hook_##_NAME##_t *hook, *ptr;                                   \
                assert(_NAME != NULL);                                                                                  \
                for (ptr = session->event_hooks._NAME; ptr && ptr->next; ptr = ptr->next) \
                        if (ptr->_NAME == _NAME) return SWITCH_STATUS_FALSE;            \
                if (ptr && ptr->_NAME == _NAME) return SWITCH_STATUS_FALSE;             \
                if ((hook = switch_core_session_alloc(session, sizeof(*hook))) != 0) { \
                        hook->_NAME = _NAME ;                                                                           \
                        if (! session->event_hooks._NAME ) {                                            \
                                session->event_hooks._NAME = hook;                                              \
                        } else {                                                                                                        \
                                ptr->next = hook;                                                                               \
                        }                                                                                                                       \
                        return SWITCH_STATUS_SUCCESS;                                                           \
                }                                                                                                                               \
                return SWITCH_STATUS_MEMERR;                                                                    \
        }                                                                                                                                       \
        NEW_HOOK_DECL_REM_P(_NAME)                                                                                      \
        {                                                                                                                                       \
                switch_io_event_hook_##_NAME##_t *ptr, *last = NULL;                    \
                assert(_NAME != NULL);                                                                                  \
                for (ptr = session->event_hooks._NAME; ptr; ptr = ptr->next) {  \
                        if (ptr->_NAME == _NAME) {                                                                      \
                                if (last) {                                                                                             \
                                        last->next = ptr->next;                                                         \
                                } else {                                                                                                \
                                        session->event_hooks._NAME = ptr->next;                         \
                                }                                                                                                               \
                                return SWITCH_STATUS_SUCCESS;                                                   \
                        }                                                                                                                       \
                        last = ptr;                                                                                                     \
                }                                                                                                                               \
                return SWITCH_STATUS_FALSE;                                                                             \
        }


NEW_HOOK_DECL_ADD_P(outgoing_channel);
NEW_HOOK_DECL_ADD_P(receive_message);
NEW_HOOK_DECL_ADD_P(receive_event);
NEW_HOOK_DECL_ADD_P(state_change);
NEW_HOOK_DECL_ADD_P(state_run);
NEW_HOOK_DECL_ADD_P(read_frame);
NEW_HOOK_DECL_ADD_P(write_frame);
NEW_HOOK_DECL_ADD_P(video_read_frame);
NEW_HOOK_DECL_ADD_P(video_write_frame);
NEW_HOOK_DECL_ADD_P(kill_channel);
NEW_HOOK_DECL_ADD_P(send_dtmf);
NEW_HOOK_DECL_ADD_P(recv_dtmf);

NEW_HOOK_DECL_REM_P(outgoing_channel);
NEW_HOOK_DECL_REM_P(receive_message);
NEW_HOOK_DECL_REM_P(receive_event);
NEW_HOOK_DECL_REM_P(state_change);
NEW_HOOK_DECL_REM_P(state_run);
NEW_HOOK_DECL_REM_P(read_frame);
NEW_HOOK_DECL_REM_P(write_frame);
NEW_HOOK_DECL_REM_P(video_read_frame);
NEW_HOOK_DECL_REM_P(video_write_frame);
NEW_HOOK_DECL_REM_P(kill_channel);
NEW_HOOK_DECL_REM_P(send_dtmf);
NEW_HOOK_DECL_REM_P(recv_dtmf);


SWITCH_END_EXTERN_C
#endif
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