event.h File Reference

#include "asterisk/event_defs.h"

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Typedefs
typedef void(*	ast_event_cb_t )(const struct ast_event *event, void *userdata)
	Subscriber event callback type.
Functions
int	ast_event_append_eid (struct ast_event **event)
	Append the global EID IE.
int	ast_event_append_ie_bitflags (struct ast_event **event, enum ast_event_ie_type ie_type, uint32_t bitflags)
	Append an information element that has a bitflags payload.
int	ast_event_append_ie_raw (struct ast_event **event, enum ast_event_ie_type ie_type, const void *data, size_t data_len)
	Append an information element that has a raw payload.
int	ast_event_append_ie_str (struct ast_event **event, enum ast_event_ie_type ie_type, const char *str)
	Append an information element that has a string payload.
int	ast_event_append_ie_uint (struct ast_event **event, enum ast_event_ie_type ie_type, uint32_t data)
	Append an information element that has an integer payload.
enum ast_event_subscriber_res	ast_event_check_subscriber (enum ast_event_type event_type,...)
	Check if subscribers exist.
void	ast_event_destroy (struct ast_event *event)
	Destroy an event.
void	ast_event_dump_cache (const struct ast_event_sub *event_sub)
	Dump the event cache for the subscriber.
struct ast_event *	ast_event_get_cached (enum ast_event_type,...)
	Retrieve an event from the cache.
uint32_t	ast_event_get_ie_bitflags (const struct ast_event *event, enum ast_event_ie_type ie_type)
	Get the value of an information element that has a bitflags payload.
enum ast_event_ie_pltype	ast_event_get_ie_pltype (enum ast_event_ie_type ie_type)
	Get the payload type for a given information element type.
const void *	ast_event_get_ie_raw (const struct ast_event *event, enum ast_event_ie_type ie_type)
	Get the value of an information element that has a raw payload.
uint16_t	ast_event_get_ie_raw_payload_len (const struct ast_event *event, enum ast_event_ie_type ie_type)
	Get the length of the raw payload for a particular IE.
const char *	ast_event_get_ie_str (const struct ast_event *event, enum ast_event_ie_type ie_type)
	Get the value of an information element that has a string payload.
uint32_t	ast_event_get_ie_str_hash (const struct ast_event *event, enum ast_event_ie_type ie_type)
	Get the hash for the string payload of an IE.
const char *	ast_event_get_ie_type_name (enum ast_event_ie_type ie_type)
	Get the string representation of an information element type.
uint32_t	ast_event_get_ie_uint (const struct ast_event *event, enum ast_event_ie_type ie_type)
	Get the value of an information element that has an integer payload.
size_t	ast_event_get_size (const struct ast_event *event)
	Get the size of an event.
enum ast_event_type	ast_event_get_type (const struct ast_event *event)
	Get the type for an event.
const char *	ast_event_get_type_name (const struct ast_event *event)
	Get the string representation of the type of the given event.
uint32_t	ast_event_iterator_get_ie_bitflags (struct ast_event_iterator *iterator)
	Get the value of the current IE in the iterator as a bitflags payload.
void *	ast_event_iterator_get_ie_raw (struct ast_event_iterator *iterator)
	Get the value of the current IE in the iterator instance that has a raw payload.
uint16_t	ast_event_iterator_get_ie_raw_payload_len (struct ast_event_iterator *iterator)
	Get the length of the raw payload for the current IE for an iterator.
const char *	ast_event_iterator_get_ie_str (struct ast_event_iterator *iterator)
	Get the value of the current IE in the iterator as a string payload.
enum ast_event_ie_type	ast_event_iterator_get_ie_type (struct ast_event_iterator *iterator)
	Get the type of the current IE in the iterator instance.
uint32_t	ast_event_iterator_get_ie_uint (struct ast_event_iterator *iterator)
	Get the value of the current IE in the iterator as an integer payload.
int	ast_event_iterator_init (struct ast_event_iterator *iterator, const struct ast_event *event)
	Initialize an event iterator instance.
int	ast_event_iterator_next (struct ast_event_iterator *iterator)
	Move iterator instance to next IE.
size_t	ast_event_minimum_length (void)
	Get the minimum length of an ast_event.
struct ast_event *	ast_event_new (enum ast_event_type event_type,...)
	Create a new event.
int	ast_event_queue (struct ast_event *event)
	Queue an event.
int	ast_event_queue_and_cache (struct ast_event *event)
	Queue and cache an event.
void	ast_event_report_subs (const struct ast_event_sub *sub)
	Report current subscriptions to a subscription subscriber.
int	ast_event_str_to_event_type (const char *str, enum ast_event_type *event_type)
	Convert a string into an event type.
int	ast_event_str_to_ie_type (const char *str, enum ast_event_ie_type *ie_type)
	Convert a string to an IE type.
int	ast_event_sub_activate (struct ast_event_sub *sub)
	Activate a dynamically built subscription.
int	ast_event_sub_append_ie_bitflags (struct ast_event_sub *sub, enum ast_event_ie_type ie_type, uint32_t flags)
	Append a bitflags parameter to a subscription.
int	ast_event_sub_append_ie_exists (struct ast_event_sub *sub, enum ast_event_ie_type ie_type)
	Append an 'exists' parameter to a subscription.
int	ast_event_sub_append_ie_raw (struct ast_event_sub *sub, enum ast_event_ie_type ie_type, void *data, size_t raw_datalen)
	Append a raw parameter to a subscription.
int	ast_event_sub_append_ie_str (struct ast_event_sub *sub, enum ast_event_ie_type ie_type, const char *str)
	Append a string parameter to a subscription.
int	ast_event_sub_append_ie_uint (struct ast_event_sub *sub, enum ast_event_ie_type ie_type, uint32_t uint)
	Append a uint parameter to a subscription.
void	ast_event_sub_destroy (struct ast_event_sub *sub)
	Destroy an allocated subscription.
struct ast_event_sub *	ast_event_subscribe (enum ast_event_type event_type, ast_event_cb_t cb, const char *description, void *userdata,...)
	Subscribe to events.
struct ast_event_sub *	ast_event_subscribe_new (enum ast_event_type type, ast_event_cb_t cb, void *userdata)
	Allocate a subscription, but do not activate it.
const char *	ast_event_subscriber_get_description (struct ast_event_sub *sub)
	Get description for a subscription.
struct ast_event_sub *	ast_event_unsubscribe (struct ast_event_sub *event_sub)
	Un-subscribe from events.

---

Detailed Description

Author:

Russell Bryant <russell@digium.com> Generic event system

Definition in file event.h.

---

Typedef Documentation

typedef void(* ast_event_cb_t)(const struct ast_event *event, void *userdata)

Subscriber event callback type.

Parameters:

event	the event being passed to the subscriber
userdata	the data provider in the call to ast_event_subscribe()

Returns:

The event callbacks do not return anything.

Definition at line 74 of file event.h.

---

Function Documentation

int ast_event_append_eid

(

struct ast_event **

event

)

Append the global EID IE.

Parameters:

event

the event to append IE to

Note:

For ast_event_new() that includes IEs, this is done automatically for you.

Return values:

0	success
-1	failure

Definition at line 1267 of file event.c.

References ast_eid_default, ast_event_append_ie_raw(), and AST_EVENT_IE_EID.

Referenced by ast_event_new().

{
   return ast_event_append_ie_raw(event, AST_EVENT_IE_EID,
         &ast_eid_default, sizeof(ast_eid_default));
}

int ast_event_append_ie_bitflags	(	struct ast_event **	event,
		enum ast_event_ie_type	ie_type,
		uint32_t	bitflags
	)

Append an information element that has a bitflags payload.

Parameters:

event	the event that the IE will be appended to
ie_type	the type of IE to append
bitflags	the flags that are the payload of the IE

Return values:

0	success
-1	failure

Since:

1.8

The pointer to the event will get updated with the new location for the event that now contains the appended information element. If the re-allocation of the memory for this event fails, it will be set to NULL.

Definition at line 1131 of file event.c.

References ast_event_append_ie_raw().

Referenced by ast_event_get_cached(), ast_event_new(), and gen_sub_event().

{
   flags = htonl(flags);
   return ast_event_append_ie_raw(event, ie_type, &flags, sizeof(flags));
}

int ast_event_append_ie_raw	(	struct ast_event **	event,
		enum ast_event_ie_type	ie_type,
		const void *	data,
		size_t	data_len
	)

Append an information element that has a raw payload.

Parameters:

event	the event that the IE will be appended to
ie_type	the type of IE to append
data	A pointer to the raw data for the payload of the IE
data_len	The amount of data to copy into the payload

Return values:

0	success
-1	failure

The pointer to the event will get updated with the new location for the event that now contains the appended information element. If the re-allocation of the memory for this event fails, it will be set to NULL.

Definition at line 1138 of file event.c.

References ast_realloc, ast_event_ie::ie_payload, ast_event_ie::ie_payload_len, and ast_event_ie::ie_type.

Referenced by ast_event_append_eid(), ast_event_append_ie_bitflags(), ast_event_append_ie_str(), ast_event_append_ie_uint(), ast_event_get_cached(), ast_event_new(), and gen_sub_event().

{
   struct ast_event_ie *ie;
   unsigned int extra_len;
   uint16_t event_len;

   event_len = ntohs((*event)->event_len);
   extra_len = sizeof(*ie) + data_len;

   if (!(*event = ast_realloc(*event, event_len + extra_len))) {
      return -1;
   }

   ie = (struct ast_event_ie *) ( ((char *) *event) + event_len );
   ie->ie_type = htons(ie_type);
   ie->ie_payload_len = htons(data_len);
   memcpy(ie->ie_payload, data, data_len);

   (*event)->event_len = htons(event_len + extra_len);

   return 0;
}

int ast_event_append_ie_str	(	struct ast_event **	event,
		enum ast_event_ie_type	ie_type,
		const char *	str
	)

Append an information element that has a string payload.

Parameters:

event	the event that the IE will be appended to
ie_type	the type of IE to append
str	The string for the payload of the IE

Return values:

0	success
-1	failure

The pointer to the event will get updated with the new location for the event that now contains the appended information element. If the re-allocation of the memory for this event fails, it will be set to NULL.

Definition at line 1109 of file event.c.

References ast_event_append_ie_raw(), ast_str_hash(), ast_event_ie_str_payload::hash, and ast_event_ie_str_payload::str.

Referenced by add_ie(), add_ipv4_ie(), add_timeval_ie(), ast_event_get_cached(), ast_event_new(), and gen_sub_event().

{
   struct ast_event_ie_str_payload *str_payload;
   size_t payload_len;

   payload_len = sizeof(*str_payload) + strlen(str);
   str_payload = alloca(payload_len);

   strcpy(str_payload->str, str);
   str_payload->hash = ast_str_hash(str);

   return ast_event_append_ie_raw(event, ie_type, str_payload, payload_len);
}

int ast_event_append_ie_uint	(	struct ast_event **	event,
		enum ast_event_ie_type	ie_type,
		uint32_t	data
	)

Append an information element that has an integer payload.

Parameters:

event	the event that the IE will be appended to
ie_type	the type of IE to append
data	The integer for the payload of the IE

Return values:

0	success
-1	failure

The pointer to the event will get updated with the new location for the event that now contains the appended information element. If the re-allocation of the memory for this event fails, it will be set to NULL.

Definition at line 1124 of file event.c.

References ast_event_append_ie_raw().

Referenced by add_ie(), ast_event_get_cached(), ast_event_new(), and gen_sub_event().

{
   data = htonl(data);
   return ast_event_append_ie_raw(event, ie_type, &data, sizeof(data));
}

enum ast_event_subscriber_res ast_event_check_subscriber	(	enum ast_event_type	event_type,
			...
	)

Check if subscribers exist.

Parameters:

event_type

This is the type of event that the caller would like to check for subscribers to.

The rest of the arguments to this function specify additional parameters for checking for subscriptions to subsets of an event type. The arguments must in sets of:

    <enum ast_event_ie_type>, [enum ast_event_ie_pltype, [payload] ]

and must end with AST_EVENT_IE_END.

If the ie_type specified is *not* AST_EVENT_IE_END, then it must be followed by a valid IE payload type. If the payload type specified is AST_EVENT_IE_PLTYPE_EXISTS, then the 3rd argument should not be provided. Otherwise, a payload must also be specified.

Returns:

This returns one of the values defined in the ast_event_subscriber_res enum which will indicate if subscribers exist that match the given criteria.

Example usage:

 if (ast_event_check_subscriber(AST_EVENT_MWI,
     AST_EVENT_IE_MAILBOX, AST_EVENT_IE_PLTYPE_STR, mailbox,
     AST_EVENT_IE_END) == AST_EVENT_SUB_NONE) {
       return;
 }

This example will check if there are any subscribers to MWI events for the mailbox defined in the "mailbox" variable.

Definition at line 435 of file event.c.

References ARRAY_LEN, AST_EVENT_ALL, AST_EVENT_IE_END, AST_EVENT_IE_PLTYPE_BITFLAGS, AST_EVENT_IE_PLTYPE_EXISTS, AST_EVENT_IE_PLTYPE_RAW, AST_EVENT_IE_PLTYPE_STR, AST_EVENT_IE_PLTYPE_UINT, AST_EVENT_IE_PLTYPE_UNKNOWN, AST_EVENT_SUB_EXISTS, AST_EVENT_SUB_NONE, ast_event_subs, AST_LIST_HEAD_NOLOCK_INIT_VALUE, AST_LIST_INSERT_TAIL, AST_LIST_TRAVERSE, ast_log(), AST_RWDLLIST_RDLOCK, AST_RWDLLIST_TRAVERSE, AST_RWDLLIST_UNLOCK, AST_RWLIST_FIRST, ast_event_ie_val::ie_pltype, ast_event_ie_val::ie_type, ast_event_sub::ie_vals, ast_ev_check_list::ie_vals, LOG_ERROR, LOG_WARNING, match_sub_ie_val_to_event(), ast_event_ie_val::payload, ast_event_ie_val::raw, ast_event_ie_val::raw_datalen, ast_event_ie_val::str, ast_event_sub::type, and ast_event_ie_val::uint.

Referenced by ast_event_queue(), ast_event_sub_activate(), and ast_event_unsubscribe().

{
   va_list ap;
   enum ast_event_ie_type ie_type;
   enum ast_event_subscriber_res res = AST_EVENT_SUB_NONE;
   struct ast_event_ie_val *ie_val;
   struct ast_event_sub *sub;
   struct ast_ev_check_list check_ie_vals = {
      .ie_vals = AST_LIST_HEAD_NOLOCK_INIT_VALUE
   };
   const enum ast_event_type event_types[] = { type, AST_EVENT_ALL };
   int i;
   int want_specific_event;/* TRUE if looking for subscribers wanting specific parameters. */

   if (type >= AST_EVENT_TOTAL) {
      ast_log(LOG_ERROR, "%u is an invalid type!\n", type);
      return res;
   }

   want_specific_event = 0;
   va_start(ap, type);
   for (ie_type = va_arg(ap, enum ast_event_ie_type);
      ie_type != AST_EVENT_IE_END;
      ie_type = va_arg(ap, enum ast_event_ie_type))
   {
      struct ast_event_ie_val *ie_value = alloca(sizeof(*ie_value));
      int insert = 0;

      memset(ie_value, 0, sizeof(*ie_value));
      ie_value->ie_type = ie_type;
      ie_value->ie_pltype = va_arg(ap, enum ast_event_ie_pltype);
      switch (ie_value->ie_pltype) {
      case AST_EVENT_IE_PLTYPE_UINT:
         ie_value->payload.uint = va_arg(ap, uint32_t);
         insert = 1;
         break;
      case AST_EVENT_IE_PLTYPE_BITFLAGS:
         ie_value->payload.uint = va_arg(ap, uint32_t);
         insert = 1;
         break;
      case AST_EVENT_IE_PLTYPE_STR:
         ie_value->payload.str = va_arg(ap, const char *);
         insert = 1;
         break;
      case AST_EVENT_IE_PLTYPE_RAW:
      {
         void *data = va_arg(ap, void *);
         size_t datalen = va_arg(ap, size_t);

         ie_value->payload.raw = alloca(datalen);
         memcpy(ie_value->payload.raw, data, datalen);
         ie_value->raw_datalen = datalen;
         insert = 1;
         break;
      }
      case AST_EVENT_IE_PLTYPE_UNKNOWN:
      case AST_EVENT_IE_PLTYPE_EXISTS:
         /* Unsupported payload type. */
         break;
      }

      if (insert) {
         want_specific_event = 1;
         AST_LIST_INSERT_TAIL(&check_ie_vals.ie_vals, ie_value, entry);
      } else {
         ast_log(LOG_WARNING, "Unsupported PLTYPE(%d)\n", ie_value->ie_pltype);
      }
   }
   va_end(ap);

   for (i = 0; i < ARRAY_LEN(event_types); i++) {
      AST_RWDLLIST_RDLOCK(&ast_event_subs[event_types[i]]);
      if (want_specific_event) {
         AST_RWDLLIST_TRAVERSE(&ast_event_subs[event_types[i]], sub, entry) {
            AST_LIST_TRAVERSE(&sub->ie_vals, ie_val, entry) {
               if (!match_sub_ie_val_to_event(ie_val, &check_ie_vals)) {
                  /* The current subscription ie did not match an event ie. */
                  break;
               }
            }
            if (!ie_val) {
               /* Everything matched.  A subscriber is looking for this event. */
               break;
            }
         }
      } else {
         /* Just looking to see if there are ANY subscribers to the event type. */
         sub = AST_RWLIST_FIRST(&ast_event_subs[event_types[i]]);
      }
      AST_RWDLLIST_UNLOCK(&ast_event_subs[event_types[i]]);
      if (sub) {
         break;
      }
   }

   return sub ? AST_EVENT_SUB_EXISTS : AST_EVENT_SUB_NONE;
}

void ast_event_destroy

(

struct ast_event *

event

)

Destroy an event.

Parameters:

event

the event to destroy

Returns:

Nothing

Note:

Events that have been queued should *not* be destroyed by the code that created the event. It will be automatically destroyed after being dispatched to the appropriate subscribers.

Definition at line 1273 of file event.c.

References ast_free.

Referenced by ast_cel_report_event(), ast_event_get_cached(), ast_event_queue(), ast_event_queue_and_cache(), ast_event_ref_destroy(), ast_event_report_subs(), ast_event_sub_activate(), ast_event_unsubscribe(), devstate_cached(), event_update_cache(), get_cached_mwi(), handle_security_event(), has_voicemail(), process_collection(), sig_pri_mwi_cache_update(), stun_monitor_request(), unistim_send_mwi_to_peer(), and update_registry().

{
   ast_free(event);
}

void ast_event_dump_cache

(

const struct ast_event_sub *

event_sub

)

Dump the event cache for the subscriber.

Since:

1.6.1

Definition at line 630 of file event.c.

References ao2_callback, ast_event_cache, dump_cache_cb(), OBJ_NODATA, and ast_event_sub::type.

Referenced by add_publish_event(), aji_init_event_distribution(), and handle_devstate_change().

{
   ao2_callback(ast_event_cache[event_sub->type].container, OBJ_NODATA,
         dump_cache_cb, (void *) event_sub);
}

struct ast_event* ast_event_get_cached	(	enum	ast_event_type,
			...
	)		[read]

Retrieve an event from the cache.

Parameters:

ast_event_type

The type of event to retrieve from the cache

The rest of the arguments to this function specify information elements to match for retrieving events from the cache. They are specified in the form:

    <enum ast_event_ie_type>, [enum ast_event_ie_pltype, [payload] ]

and must end with AST_EVENT_IE_END.

If the ie_type specified is *not* AST_EVENT_IE_END, then it must be followed by a valid IE payload type. If the payload type specified is AST_EVENT_IE_PLTYPE_EXISTS, then the 3rd argument should not be provided. Otherwise, a payload must also be specified.

Returns:

A reference to an event retrieved from the cache. If no event was found that matches the specified criteria, then NULL will be returned.

Note:

If more than one event in the cache matches the specified criteria, only one will be returned, and it is undefined which one it will be.

The caller of this function *must* call ast_event_destroy() on the returned event after it is done using it.

Example Usage:

 event = ast_event_get_cached(AST_EVENT_MWI,
     AST_EVENT_IE_MAILBOX, AST_EVENT_IE_PLTYPE_STR, mailbox,
     AST_EVENT_IE_END);

This example will check for an MWI event in the cache that matches the specified mailbox. This would be the way to find out the last known state of a mailbox without having to poll the mailbox directly.

Definition at line 1301 of file event.c.

References ao2_find, ao2_ref, ast_event_append_ie_bitflags(), ast_event_append_ie_raw(), ast_event_append_ie_str(), ast_event_append_ie_uint(), ast_event_cache, ast_event_destroy(), ast_event_dup(), AST_EVENT_IE_END, AST_EVENT_IE_PLTYPE_BITFLAGS, AST_EVENT_IE_PLTYPE_EXISTS, AST_EVENT_IE_PLTYPE_RAW, AST_EVENT_IE_PLTYPE_STR, AST_EVENT_IE_PLTYPE_UINT, AST_EVENT_IE_PLTYPE_UNKNOWN, ast_event_new(), ast_log(), container, ast_event_ref::event, LOG_ERROR, LOG_WARNING, and OBJ_POINTER.

Referenced by devstate_cached(), get_cached_mwi(), has_voicemail(), process_collection(), sig_pri_mwi_cache_update(), unistim_send_mwi_to_peer(), and update_registry().

{
   va_list ap;
   enum ast_event_ie_type ie_type;
   struct ast_event *dup_event = NULL;
   struct ast_event_ref *cached_event_ref;
   struct ast_event *cache_arg_event;
   struct ast_event_ref tmp_event_ref = {
      .event = NULL,
   };
   struct ao2_container *container = NULL;

   if (type >= AST_EVENT_TOTAL) {
      ast_log(LOG_ERROR, "%u is an invalid type!\n", type);
      return NULL;
   }

   if (!(container = ast_event_cache[type].container)) {
      ast_log(LOG_ERROR, "%u is not a cached event type\n", type);
      return NULL;
   }

   if (!(cache_arg_event = ast_event_new(type, AST_EVENT_IE_END))) {
      return NULL;
   }

   va_start(ap, type);
   for (ie_type = va_arg(ap, enum ast_event_ie_type);
      ie_type != AST_EVENT_IE_END;
      ie_type = va_arg(ap, enum ast_event_ie_type))
   {
      enum ast_event_ie_pltype ie_pltype;

      ie_pltype = va_arg(ap, enum ast_event_ie_pltype);

      switch (ie_pltype) {
      case AST_EVENT_IE_PLTYPE_UINT:
         ast_event_append_ie_uint(&cache_arg_event, ie_type, va_arg(ap, uint32_t));
         break;
      case AST_EVENT_IE_PLTYPE_BITFLAGS:
         ast_event_append_ie_bitflags(&cache_arg_event, ie_type, va_arg(ap, uint32_t));
         break;
      case AST_EVENT_IE_PLTYPE_STR:
         ast_event_append_ie_str(&cache_arg_event, ie_type, va_arg(ap, const char *));
         break;
      case AST_EVENT_IE_PLTYPE_RAW:
      {
         void *data = va_arg(ap, void *);
         size_t datalen = va_arg(ap, size_t);
         ast_event_append_ie_raw(&cache_arg_event, ie_type, data, datalen);
         break;
      }
      case AST_EVENT_IE_PLTYPE_EXISTS:
         ast_log(LOG_WARNING, "PLTYPE_EXISTS not supported by this function\n");
         break;
      case AST_EVENT_IE_PLTYPE_UNKNOWN:
         break;
      }
   }
   va_end(ap);

   tmp_event_ref.event = cache_arg_event;

   cached_event_ref = ao2_find(container, &tmp_event_ref, OBJ_POINTER);

   ast_event_destroy(cache_arg_event);
   cache_arg_event = NULL;

   if (cached_event_ref) {
      dup_event = ast_event_dup(cached_event_ref->event);
      ao2_ref(cached_event_ref, -1);
      cached_event_ref = NULL;
   }

   return dup_event;
}

uint32_t ast_event_get_ie_bitflags	(	const struct ast_event *	event,
		enum ast_event_ie_type	ie_type
	)

Get the value of an information element that has a bitflags payload.

Parameters:

event	The event to get the IE from
ie_type	the type of information element to retrieve

Returns:

This returns the payload of the information element with the given type. However, an IE with a payload of 0, and the case where no IE is found yield the same return value.

Definition at line 1054 of file event.c.

References ast_event_get_ie_raw(), and get_unaligned_uint32().

Referenced by append_ie(), and match_ie_val().

{
   const uint32_t *ie_val;

   ie_val = ast_event_get_ie_raw(event, ie_type);

   return ie_val ? ntohl(get_unaligned_uint32(ie_val)) : 0;
}

enum ast_event_ie_pltype ast_event_get_ie_pltype

(

enum ast_event_ie_type

ie_type

)

Get the payload type for a given information element type.

Parameters:

ie_type

the information element type to get the payload type of

Returns:

the payload type for the provided IE type

Since:

1.6.1

Definition at line 309 of file event.c.

References ARRAY_LEN, AST_EVENT_IE_PLTYPE_UNKNOWN, ast_log(), ie_maps, ie_map::ie_pltype, and LOG_ERROR.

Referenced by append_ie(), ast_event_cmp(), and event_dump_cli().

{
   if (ie_type <= 0 || ie_type >= ARRAY_LEN(ie_maps)) {
      ast_log(LOG_ERROR, "Invalid IE type - '%d'\n", ie_type);
      return AST_EVENT_IE_PLTYPE_UNKNOWN;
   }

   return ie_maps[ie_type].ie_pltype;
}

const void* ast_event_get_ie_raw	(	const struct ast_event *	event,
		enum ast_event_ie_type	ie_type
	)

Get the value of an information element that has a raw payload.

Parameters:

event	The event to get the IE from
ie_type	the type of information element to retrieve

Returns:

This returns the payload of the information element with the given type. If the information element isn't found, NULL will be returned.

Definition at line 1081 of file event.c.

References ast_event_iterator_get_ie_raw(), ast_event_iterator_get_ie_type(), ast_event_iterator_init(), and ast_event_iterator_next().

Referenced by aji_devstate_cb(), aji_mwi_cb(), ast_event_cb(), ast_event_get_ie_bitflags(), ast_event_get_ie_str(), ast_event_get_ie_str_hash(), ast_event_get_ie_uint(), ast_event_new(), devstate_cache_cb(), devstate_change_collector_cb(), evt_event_deliver_cb(), ie_is_present(), and match_ie_val().

{
   struct ast_event_iterator iterator;
   int res;

   for (res = ast_event_iterator_init(&iterator, event); !res; res = ast_event_iterator_next(&iterator)) {
      if (ast_event_iterator_get_ie_type(&iterator) == ie_type) {
         return ast_event_iterator_get_ie_raw(&iterator);
      }
   }

   return NULL;
}

uint16_t ast_event_get_ie_raw_payload_len	(	const struct ast_event *	event,
		enum ast_event_ie_type	ie_type
	)

Get the length of the raw payload for a particular IE.

Parameters:

event	The event to get the IE payload length from
ie_type	the type of information element to get the length of

Returns:

If an IE of type ie_type is found, its payload length is returned. Otherwise, 0 is returned.

Definition at line 1095 of file event.c.

References ast_event_iterator_get_ie_raw_payload_len(), ast_event_iterator_get_ie_type(), ast_event_iterator_init(), and ast_event_iterator_next().

Referenced by match_ie_val().

{
   struct ast_event_iterator iterator;
   int res;

   for (res = ast_event_iterator_init(&iterator, event); !res; res = ast_event_iterator_next(&iterator)) {
      if (ast_event_iterator_get_ie_type(&iterator) == ie_type) {
         return ast_event_iterator_get_ie_raw_payload_len(&iterator);
      }
   }

   return 0;
}

const char* ast_event_get_ie_str	(	const struct ast_event *	event,
		enum ast_event_ie_type	ie_type
	)

Get the value of an information element that has a string payload.

Parameters:

event	The event to get the IE from
ie_type	the type of information element to retrieve

Returns:

This returns the payload of the information element with the given type. If the information element isn't found, NULL will be returned.

Definition at line 1072 of file event.c.

References ast_event_get_ie_raw(), and ast_event_ie_str_payload::str.

Referenced by aji_devstate_cb(), aji_mwi_cb(), append_ie(), ast_cel_fill_record(), ast_event_hash_devstate(), ast_event_hash_devstate_change(), ast_event_hash_mwi(), device_state_cb(), devstate_change_collector_cb(), generic_monitor_devstate_cb(), match_ie_val(), mwi_sub_event_cb(), print_cel_sub(), and sig_pri_mwi_event_cb().

{
   const struct ast_event_ie_str_payload *str_payload;

   str_payload = ast_event_get_ie_raw(event, ie_type);

   return str_payload ? str_payload->str : NULL;
}

uint32_t ast_event_get_ie_str_hash	(	const struct ast_event *	event,
		enum ast_event_ie_type	ie_type
	)

Get the hash for the string payload of an IE.

Parameters:

event	The event to get the IE from
ie_type	the type of information element to retrieve the hash for

Returns:

This function returns the hash value as calculated by ast_str_hash() for the string payload. This is stored in the event to avoid unnecessary string comparisons.

Definition at line 1063 of file event.c.

References ast_event_get_ie_raw(), and ast_event_ie_str_payload::hash.

Referenced by match_ie_val().

{
   const struct ast_event_ie_str_payload *str_payload;

   str_payload = ast_event_get_ie_raw(event, ie_type);

   return str_payload ? str_payload->hash : 0;
}

const char* ast_event_get_ie_type_name

(

enum ast_event_ie_type

ie_type

)

Get the string representation of an information element type.

Parameters:

ie_type

the information element type to get the string representation of

Returns:

the string representation of the information element type

Since:

1.6.1

Definition at line 299 of file event.c.

References ARRAY_LEN, ast_log(), ie_maps, LOG_ERROR, and ie_map::name.

Referenced by append_ie(), dump_raw_ie(), event_dump_cache(), event_dump_cli(), and security_event_cb().

{
   if (ie_type <= 0 || ie_type >= ARRAY_LEN(ie_maps)) {
      ast_log(LOG_ERROR, "Invalid IE type - '%d'\n", ie_type);
      return "";
   }

   return ie_maps[ie_type].name;
}

uint32_t ast_event_get_ie_uint	(	const struct ast_event *	event,
		enum ast_event_ie_type	ie_type
	)

Get the value of an information element that has an integer payload.

Parameters:

event	The event to get the IE from
ie_type	the type of information element to retrieve

Returns:

This returns the payload of the information element with the given type. However, an IE with a payload of 0, and the case where no IE is found yield the same return value.

Definition at line 1045 of file event.c.

References ast_event_get_ie_raw(), and get_unaligned_uint32().

Referenced by aji_devstate_cb(), aji_mwi_cb(), append_ie(), ast_cel_fill_record(), device_state_cb(), devstate_cache_cb(), devstate_cached(), devstate_change_collector_cb(), generic_agent_devstate_cb(), generic_monitor_devstate_cb(), get_cached_mwi(), has_voicemail(), match_ie_val(), mwi_event_cb(), mwi_sub_event_cb(), mwi_unsub_event_cb(), process_collection(), security_event_cb(), sig_pri_mwi_cache_update(), sig_pri_mwi_event_cb(), unistim_send_mwi_to_peer(), and update_registry().

{
   const uint32_t *ie_val;

   ie_val = ast_event_get_ie_raw(event, ie_type);

   return ie_val ? ntohl(get_unaligned_uint32(ie_val)) : 0;
}

size_t ast_event_get_size

(

const struct ast_event *

event

)

Get the size of an event.

Parameters:

event

the event to get the size of

Returns:

the number of bytes contained in the event

Since:

1.6.1

Definition at line 335 of file event.c.

References ast_event::event_len.

Referenced by ast_event_cb(), ast_event_dup(), and ast_event_iterator_init().

{
   size_t res;

   res = ntohs(event->event_len);

   return res;
}

enum ast_event_type ast_event_get_type

(

const struct ast_event *

event

)

Get the type for an event.

Parameters:

event

the event to get the type for

Returns:

the event type as represented by one of the values in the ast_event_type enum

Definition at line 1040 of file event.c.

References ast_event::type.

Referenced by ast_event_cb(), ast_event_cmp(), ast_event_get_type_name(), ast_event_hash(), ast_event_queue_and_cache(), mwi_sub_event_cb(), and mwi_unsub_event_cb().

{
   return ntohs(event->type);
}

const char* ast_event_get_type_name

(

const struct ast_event *

event

)

Get the string representation of the type of the given event.

• event the event to get the type of

Returns:

the string representation of the event type of the provided event

Since:

1.6.1

Definition at line 269 of file event.c.

References ARRAY_LEN, ast_event_get_type(), ast_log(), event_names, LOG_ERROR, and ast_event_sub::type.

Referenced by event_dump_cli().

{
   enum ast_event_type type;

   type = ast_event_get_type(event);

   if (type < 0 || type >= ARRAY_LEN(event_names)) {
      ast_log(LOG_ERROR, "Invalid event type - '%d'\n", type);
      return "";
   }

   return event_names[type];
}

uint32_t ast_event_iterator_get_ie_bitflags

(

struct ast_event_iterator *

iterator

)

Get the value of the current IE in the iterator as a bitflags payload.

Parameters:

iterator

The iterator instance

Returns:

This returns the payload of the information element as bitflags.

Definition at line 1016 of file event.c.

References get_unaligned_uint32(), ast_event_iterator::ie, and ast_event_ie::ie_payload.

Referenced by event_dump_cli().

{
   return ntohl(get_unaligned_uint32(iterator->ie->ie_payload));
}

void* ast_event_iterator_get_ie_raw

(

struct ast_event_iterator *

iterator

)

Get the value of the current IE in the iterator instance that has a raw payload.

Parameters:

iterator

The iterator instance

Returns:

This returns the payload of the information element as type raw.

Definition at line 1030 of file event.c.

References ast_event_iterator::ie, and ast_event_ie::ie_payload.

Referenced by ast_event_get_ie_raw(), and dump_raw_ie().

{
   return iterator->ie->ie_payload;
}

uint16_t ast_event_iterator_get_ie_raw_payload_len

(

struct ast_event_iterator *

iterator

)

Get the length of the raw payload for the current IE for an iterator.

Parameters:

iterator

The IE iterator

Returns:

The payload length of the current IE

Definition at line 1035 of file event.c.

References ast_event_iterator::ie, and ast_event_ie::ie_payload_len.

Referenced by ast_event_get_ie_raw_payload_len().

{
   return ntohs(iterator->ie->ie_payload_len);
}

const char* ast_event_iterator_get_ie_str

(

struct ast_event_iterator *

iterator

)

Get the value of the current IE in the iterator as a string payload.

Parameters:

iterator

The iterator instance

Returns:

This returns the payload of the information element as a string.

Definition at line 1021 of file event.c.

References ast_event_iterator::ie, ast_event_ie::ie_payload, and ast_event_ie_str_payload::str.

Referenced by event_dump_cli().

{
   const struct ast_event_ie_str_payload *str_payload;

   str_payload = (struct ast_event_ie_str_payload *) iterator->ie->ie_payload;

   return str_payload ? str_payload->str : NULL;
}

enum ast_event_ie_type ast_event_iterator_get_ie_type

(

struct ast_event_iterator *

iterator

)

Get the type of the current IE in the iterator instance.

Parameters:

iterator

The iterator instance

Returns:

the ie type as represented by one of the value sin the ast_event_ie_type enum

Definition at line 1006 of file event.c.

References ast_event_iterator::ie, and ast_event_ie::ie_type.

Referenced by ast_event_get_ie_raw(), ast_event_get_ie_raw_payload_len(), dump_raw_ie(), and event_dump_cli().

{
   return ntohs(iterator->ie->ie_type);
}

uint32_t ast_event_iterator_get_ie_uint

(

struct ast_event_iterator *

iterator

)

Get the value of the current IE in the iterator as an integer payload.

Parameters:

iterator

The iterator instance

Returns:

This returns the payload of the information element as a uint.

Definition at line 1011 of file event.c.

References get_unaligned_uint32(), ast_event_iterator::ie, and ast_event_ie::ie_payload.

Referenced by event_dump_cli().

{
   return ntohl(get_unaligned_uint32(iterator->ie->ie_payload));
}

int ast_event_iterator_init	(	struct ast_event_iterator *	iterator,
		const struct ast_event *	event
	)

Initialize an event iterator instance.

Parameters:

iterator	The iterator instance to initialize
event	The event that will be iterated through

Return values:

0	Success, there are IEs available to iterate
-1	Failure, there are no IEs in the event to iterate

Definition at line 984 of file event.c.

References ast_event_get_size(), ast_event_iterator::event, ast_event_iterator::event_len, and ast_event_iterator::ie.

Referenced by ast_event_get_ie_raw(), ast_event_get_ie_raw_payload_len(), and event_dump_cli().

{
   int res = 0;

   iterator->event_len = ast_event_get_size(event);
   iterator->event = event;
   if (iterator->event_len >= sizeof(*event) + sizeof(struct ast_event_ie)) {
      iterator->ie = (struct ast_event_ie *) ( ((char *) event) + sizeof(*event) );
   } else {
      iterator->ie = NULL;
      res = -1;
   }

   return res;
}

int ast_event_iterator_next

(

struct ast_event_iterator *

iterator

)

Move iterator instance to next IE.

Parameters:

iterator

The iterator instance

Return values:

0	on success
-1	if end is reached

Definition at line 1000 of file event.c.

References ast_event_iterator::event, ast_event_iterator::event_len, ast_event_iterator::ie, and ast_event_ie::ie_payload_len.

Referenced by ast_event_get_ie_raw(), ast_event_get_ie_raw_payload_len(), and event_dump_cli().

{
   iterator->ie = (struct ast_event_ie *) ( ((char *) iterator->ie) + sizeof(*iterator->ie) + ntohs(iterator->ie->ie_payload_len));
   return ((iterator->event_len <= (((char *) iterator->ie) - ((char *) iterator->event))) ? -1 : 0);
}

size_t ast_event_minimum_length

(

void

)

Get the minimum length of an ast_event.

Returns:

minimum amount of memory that will be consumed by any ast_event.

Definition at line 1773 of file event.c.

Referenced by evt_event_deliver_cb().

{
   return sizeof(struct ast_event);
}

struct ast_event* ast_event_new	(	enum ast_event_type	event_type,
			...
	)		[read]

Create a new event.

Parameters:

event_type

The type of event to create

The rest of the arguments to this function specify information elements to add to the event. They are specified in the form:

    <enum ast_event_ie_type>, [enum ast_event_ie_pltype, [payload] ]

and must end with AST_EVENT_IE_END.

If the ie_type specified is *not* AST_EVENT_IE_END, then it must be followed by a valid IE payload type. The payload type, EXISTS, should not be used here because it makes no sense to do so. So, a payload must also be specified after the IE payload type.

Note:

The EID IE will be appended automatically when this function is used with at least one IE specified.

Returns:

This returns the event that has been created. If there is an error creating the event, NULL will be returned.

Example usage:

 if (!(event = ast_event_new(AST_EVENT_MWI,
     AST_EVENT_IE_MAILBOX, AST_EVENT_IE_PLTYPE_STR, mailbox,
     AST_EVENT_IE_NEWMSGS, AST_EVENT_IE_PLTYPE_UINT, new,
     AST_EVENT_IE_OLDMSGS, AST_EVENT_IE_PLTYPE_UINT, old,
     AST_EVENT_IE_END))) {
       return;
 }

This creates a MWI event with 3 information elements, a mailbox which is a string, and the number of new and old messages, specified as integers.

Definition at line 1162 of file event.c.

References ast_calloc, ast_event_append_eid(), ast_event_append_ie_bitflags(), ast_event_append_ie_raw(), ast_event_append_ie_str(), ast_event_append_ie_uint(), ast_event_get_ie_raw(), AST_EVENT_IE_EID, AST_EVENT_IE_END, AST_EVENT_IE_PLTYPE_BITFLAGS, AST_EVENT_IE_PLTYPE_EXISTS, AST_EVENT_IE_PLTYPE_RAW, AST_EVENT_IE_PLTYPE_STR, AST_EVENT_IE_PLTYPE_UINT, AST_EVENT_IE_PLTYPE_UNKNOWN, AST_LIST_HEAD_NOLOCK_STATIC, AST_LIST_INSERT_TAIL, AST_LIST_TRAVERSE, ast_log(), ast_event_ie_val::ie_pltype, ast_event_ie_val::ie_type, LOG_WARNING, ast_event_ie_val::payload, ast_event_ie_val::raw, ast_event_ie_val::raw_datalen, ast_event_ie_val::str, and ast_event_ie_val::uint.

Referenced by aji_handle_pubsub_event(), alloc_event(), ast_cel_report_event(), ast_event_get_cached(), ast_event_unsubscribe(), devstate_event(), gen_sub_event(), handle_request_notify(), notify_message(), process_collection(), queue_mwi_event(), and stun_monitor_request().

{
   va_list ap;
   struct ast_event *event;
   enum ast_event_ie_type ie_type;
   struct ast_event_ie_val *ie_val;
   int has_ie = 0;
   AST_LIST_HEAD_NOLOCK_STATIC(ie_vals, ast_event_ie_val);

   /* Invalid type */
   if (type >= AST_EVENT_TOTAL) {
      ast_log(LOG_WARNING, "Someone tried to create an event of invalid "
         "type '%d'!\n", type);
      return NULL;
   }

   va_start(ap, type);
   for (ie_type = va_arg(ap, enum ast_event_ie_type);
      ie_type != AST_EVENT_IE_END;
      ie_type = va_arg(ap, enum ast_event_ie_type))
   {
      struct ast_event_ie_val *ie_value = alloca(sizeof(*ie_value));
      int insert = 0;

      memset(ie_value, 0, sizeof(*ie_value));
      ie_value->ie_type = ie_type;
      ie_value->ie_pltype = va_arg(ap, enum ast_event_ie_pltype);
      switch (ie_value->ie_pltype) {
      case AST_EVENT_IE_PLTYPE_UINT:
         ie_value->payload.uint = va_arg(ap, uint32_t);
         insert = 1;
         break;
      case AST_EVENT_IE_PLTYPE_BITFLAGS:
         ie_value->payload.uint = va_arg(ap, uint32_t);
         insert = 1;
         break;
      case AST_EVENT_IE_PLTYPE_STR:
         ie_value->payload.str = va_arg(ap, const char *);
         insert = 1;
         break;
      case AST_EVENT_IE_PLTYPE_RAW:
      {
         void *data = va_arg(ap, void *);
         size_t datalen = va_arg(ap, size_t);
         ie_value->payload.raw = alloca(datalen);
         memcpy(ie_value->payload.raw, data, datalen);
         ie_value->raw_datalen = datalen;
         insert = 1;
         break;
      }
      case AST_EVENT_IE_PLTYPE_UNKNOWN:
      case AST_EVENT_IE_PLTYPE_EXISTS:
         break;
      }

      if (insert) {
         AST_LIST_INSERT_TAIL(&ie_vals, ie_value, entry);
         has_ie = 1;
      } else {
         ast_log(LOG_WARNING, "Unsupported PLTYPE(%d)\n", ie_value->ie_pltype);
      }
   }
   va_end(ap);

   if (!(event = ast_calloc(1, sizeof(*event)))) {
      return NULL;
   }

   event->type = htons(type);
   event->event_len = htons(sizeof(*event));

   AST_LIST_TRAVERSE(&ie_vals, ie_val, entry) {
      switch (ie_val->ie_pltype) {
      case AST_EVENT_IE_PLTYPE_STR:
         ast_event_append_ie_str(&event, ie_val->ie_type, ie_val->payload.str);
         break;
      case AST_EVENT_IE_PLTYPE_UINT:
         ast_event_append_ie_uint(&event, ie_val->ie_type, ie_val->payload.uint);
         break;
      case AST_EVENT_IE_PLTYPE_BITFLAGS:
         ast_event_append_ie_bitflags(&event, ie_val->ie_type, ie_val->payload.uint);
         break;
      case AST_EVENT_IE_PLTYPE_RAW:
         ast_event_append_ie_raw(&event, ie_val->ie_type,
               ie_val->payload.raw, ie_val->raw_datalen);
         break;
      case AST_EVENT_IE_PLTYPE_EXISTS:
      case AST_EVENT_IE_PLTYPE_UNKNOWN:
         break;
      }

      if (!event) {
         break;
      }
   }

   if (has_ie && !ast_event_get_ie_raw(event, AST_EVENT_IE_EID)) {
      /* If the event is originating on this server, add the server's
       * entity ID to the event. */
      ast_event_append_eid(&event);
   }

   return event;
}

int ast_event_queue

(

struct ast_event *

event

)

Queue an event.

Parameters:

event

the event to be queued

Return values:

zero	success
non-zero	failure. Note that the caller of this function is responsible for destroying the event in the case of a failure.

This function queues an event to be dispatched to all of the appropriate subscribers. This function will not block while the event is being dispatched because the event is queued up for a dispatching thread to handle.

Definition at line 1476 of file event.c.

References alloc_event_ref(), ao2_ref, ast_event_check_subscriber(), ast_event_destroy(), AST_EVENT_IE_END, AST_EVENT_SUB_NONE, ast_log(), ast_taskprocessor_push(), ast_event_ref::event, handle_event(), LOG_WARNING, and ast_event::type.

Referenced by ast_cel_report_event(), ast_event_queue_and_cache(), ast_event_sub_activate(), ast_event_unsubscribe(), handle_security_event(), and stun_monitor_request().

{
   struct ast_event_ref *event_ref;
   uint16_t host_event_type;
   int res;

   host_event_type = ntohs(event->type);

   /* Invalid type */
   if (host_event_type >= AST_EVENT_TOTAL) {
      ast_log(LOG_WARNING, "Someone tried to queue an event of invalid "
         "type '%d'!\n", host_event_type);
      return -1;
   }

   /* If nobody has subscribed to this event type, throw it away now */
   if (ast_event_check_subscriber(host_event_type, AST_EVENT_IE_END)
         == AST_EVENT_SUB_NONE) {
      ast_event_destroy(event);
      return 0;
   }

   if (!(event_ref = alloc_event_ref())) {
      return -1;
   }

   event_ref->event = event;

   res = ast_taskprocessor_push(event_dispatcher, handle_event, event_ref);
   if (res) {
      event_ref->event = NULL;
      ao2_ref(event_ref, -1);
   }
   return res;
}

int ast_event_queue_and_cache

(

struct ast_event *

event

)

Queue and cache an event.

Parameters:

event

the event to be queued and cached

The purpose of caching events is so that the core can retain the last known information for events that represent some sort of state. That way, when code needs to find out the current state, it can query the cache.

The event API already knows which events can be cached and how to cache them.

Return values:

0	success
non-zero	failure.

Definition at line 1424 of file event.c.

References ast_event_cache, ast_event_destroy(), ast_event_get_type(), ast_event_queue(), ast_log(), container, event_update_cache(), and LOG_WARNING.

Referenced by aji_handle_pubsub_event(), devstate_event(), handle_request_notify(), notify_message(), process_collection(), queue_event(), and queue_mwi_event().

{
   struct ao2_container *container;

   container = ast_event_cache[ast_event_get_type(event)].container;
   if (!container) {
      ast_log(LOG_WARNING, "cache requested for non-cached event type\n");
   } else {
      event_update_cache(container, event);
   }

   if (ast_event_queue(event)) {
      ast_event_destroy(event);
   }
   return 0;
}

void ast_event_report_subs

(

const struct ast_event_sub *

event_sub

)

Report current subscriptions to a subscription subscriber.

• sub the subscription subscriber

Returns:

nothing

This reports all of the current subscribers to a subscriber of subscribers to a specific event type. (Try saying that a few times fast).

The idea here is that it is sometimes very useful for a module to know when someone subscribes to events. However, when they first subscribe, this provides that module the ability to request the event core report to them all of the subscriptions to that event type that already exist.

Definition at line 677 of file event.c.

References ast_event_destroy(), AST_EVENT_IE_EVENTTYPE, AST_EVENT_SUB, ast_event_subs, AST_LIST_TRAVERSE, AST_RWDLLIST_RDLOCK, AST_RWDLLIST_TRAVERSE, AST_RWDLLIST_UNLOCK, ast_event_sub::cb, gen_sub_event(), ast_event_ie_val::ie_type, ast_event_sub::ie_vals, ast_event_ie_val::payload, ast_event_sub::type, ast_event_ie_val::uint, and ast_event_sub::userdata.

Referenced by handle_cli_status(), and start_poll_thread().

{
   struct ast_event *event;
   struct ast_event_sub *sub;
   enum ast_event_type event_type = -1;
   struct ast_event_ie_val *ie_val;

   if (event_sub->type != AST_EVENT_SUB)
      return;

   AST_LIST_TRAVERSE(&event_sub->ie_vals, ie_val, entry) {
      if (ie_val->ie_type == AST_EVENT_IE_EVENTTYPE) {
         event_type = ie_val->payload.uint;
         break;
      }
   }

   if (event_type == -1)
      return;

   AST_RWDLLIST_RDLOCK(&ast_event_subs[event_type]);
   AST_RWDLLIST_TRAVERSE(&ast_event_subs[event_type], sub, entry) {
      if (event_sub == sub) {
         continue;
      }

      event = gen_sub_event(sub);
      if (!event) {
         continue;
      }

      event_sub->cb(event, event_sub->userdata);

      ast_event_destroy(event);
   }
   AST_RWDLLIST_UNLOCK(&ast_event_subs[event_type]);
}

int ast_event_str_to_event_type	(	const char *	str,
		enum ast_event_type *	event_type
	)

Convert a string into an event type.

Parameters:

str	the string to convert
event_type	an output parameter for the event type

Return values:

0	success
non-zero	failure

Since:

1.6.1

Definition at line 283 of file event.c.

References ARRAY_LEN, ast_strlen_zero(), and event_names.

Referenced by event_dump_cache().

{
   int i;

   for (i = 0; i < ARRAY_LEN(event_names); i++) {
      if (ast_strlen_zero(event_names[i]) || strcasecmp(event_names[i], str)) {
         continue;
      }

      *event_type = i;
      return 0;
   }

   return -1;
}

int ast_event_str_to_ie_type	(	const char *	str,
		enum ast_event_ie_type *	ie_type
	)

Convert a string to an IE type.

Parameters:

str	the string to convert
ie_type	an output parameter for the IE type

Return values:

0	success
non-zero	failure

Since:

1.6.1

Definition at line 319 of file event.c.

References ARRAY_LEN, ie_maps, and name.

{
   int i;

   for (i = 0; i < ARRAY_LEN(ie_maps); i++) {
      if (strcasecmp(ie_maps[i].name, str)) {
         continue;
      }

      *ie_type = i;
      return 0;
   }

   return -1;
}

int ast_event_sub_activate

(

struct ast_event_sub *

sub

)

Activate a dynamically built subscription.

Parameters:

sub	the subscription to activate that was allocated using ast_event_subscribe_new()

Once a dynamically built subscription has had all of the parameters added to it, it should be activated using this function.

Return values:

0	success
non-zero	failure

Since:

1.6.1

Definition at line 859 of file event.c.

References ast_event_check_subscriber(), ast_event_destroy(), AST_EVENT_IE_END, AST_EVENT_IE_EVENTTYPE, AST_EVENT_IE_PLTYPE_UINT, ast_event_queue(), AST_EVENT_SUB, AST_EVENT_SUB_NONE, ast_event_subs, AST_RWDLLIST_INSERT_TAIL, AST_RWDLLIST_UNLOCK, AST_RWDLLIST_WRLOCK, gen_sub_event(), and ast_event_sub::type.

Referenced by ast_event_subscribe().

{
   if (ast_event_check_subscriber(AST_EVENT_SUB,
      AST_EVENT_IE_EVENTTYPE, AST_EVENT_IE_PLTYPE_UINT, sub->type,
      AST_EVENT_IE_END) != AST_EVENT_SUB_NONE) {
      struct ast_event *event;

      event = gen_sub_event(sub);
      if (event && ast_event_queue(event)) {
         ast_event_destroy(event);
      }
   }

   AST_RWDLLIST_WRLOCK(&ast_event_subs[sub->type]);
   AST_RWDLLIST_INSERT_TAIL(&ast_event_subs[sub->type], sub, entry);
   AST_RWDLLIST_UNLOCK(&ast_event_subs[sub->type]);

   return 0;
}

int ast_event_sub_append_ie_bitflags	(	struct ast_event_sub *	sub,
		enum ast_event_ie_type	ie_type,
		uint32_t	flags
	)

Append a bitflags parameter to a subscription.

Parameters:

sub	the dynamic subscription allocated with ast_event_subscribe_new()
ie_type	the information element type for the parameter
flags	the flags that must be present in the event to match this subscription

Return values:

0	success
non-zero	failure

Since:

1.8

Definition at line 759 of file event.c.

References ast_calloc, AST_EVENT_IE_PLTYPE_BITFLAGS, AST_EVENT_IE_TOTAL, AST_LIST_INSERT_TAIL, ast_event_ie_val::ie_pltype, ast_event_ie_val::ie_type, ast_event_sub::ie_vals, ast_event_ie_val::payload, and ast_event_ie_val::uint.

Referenced by ast_event_subscribe().

{
   struct ast_event_ie_val *ie_val;

   if (ie_type <= 0 || ie_type >= AST_EVENT_IE_TOTAL) {
      return -1;
   }

   if (!(ie_val = ast_calloc(1, sizeof(*ie_val)))) {
      return -1;
   }

   ie_val->ie_type = ie_type;
   ie_val->payload.uint = flags;
   ie_val->ie_pltype = AST_EVENT_IE_PLTYPE_BITFLAGS;

   AST_LIST_INSERT_TAIL(&sub->ie_vals, ie_val, entry);

   return 0;
}

int ast_event_sub_append_ie_exists	(	struct ast_event_sub *	sub,
		enum ast_event_ie_type	ie_type
	)

Append an 'exists' parameter to a subscription.

Parameters:

sub	the dynamic subscription allocated with ast_event_subscribe_new()
ie_type	the information element type that must be present in the event for it to match this subscription.

Return values:

0	success
non-zero	failure

Since:

1.6.1

Definition at line 781 of file event.c.

References ast_calloc, AST_EVENT_IE_PLTYPE_EXISTS, AST_EVENT_IE_TOTAL, AST_LIST_INSERT_TAIL, ast_event_ie_val::ie_pltype, ast_event_ie_val::ie_type, and ast_event_sub::ie_vals.

Referenced by ast_event_subscribe().

{
   struct ast_event_ie_val *ie_val;

   if (ie_type <= 0 || ie_type >= AST_EVENT_IE_TOTAL) {
      return -1;
   }

   if (!(ie_val = ast_calloc(1, sizeof(*ie_val)))) {
      return -1;
   }

   ie_val->ie_type = ie_type;
   ie_val->ie_pltype = AST_EVENT_IE_PLTYPE_EXISTS;

   AST_LIST_INSERT_TAIL(&sub->ie_vals, ie_val, entry);

   return 0;
}

int ast_event_sub_append_ie_raw	(	struct ast_event_sub *	sub,
		enum ast_event_ie_type	ie_type,
		void *	data,
		size_t	raw_datalen
	)

Append a raw parameter to a subscription.

Parameters:

sub	the dynamic subscription allocated with ast_event_subscribe_new()
ie_type	the information element type for the parameter
data	the data that must be present in the event to match this subscription
raw_datalen	length of data

Return values:

0	success
non-zero	failure

Since:

1.6.1

Definition at line 830 of file event.c.

References ast_calloc, AST_EVENT_IE_PLTYPE_RAW, AST_EVENT_IE_TOTAL, ast_free, AST_LIST_INSERT_TAIL, ast_malloc, ast_event_ie_val::ie_pltype, ast_event_ie_val::ie_type, ast_event_sub::ie_vals, ast_event_ie_val::payload, ast_event_ie_val::raw, and ast_event_ie_val::raw_datalen.

Referenced by ast_event_subscribe().

{
   struct ast_event_ie_val *ie_val;

   if (ie_type <= 0 || ie_type >= AST_EVENT_IE_TOTAL) {
      return -1;
   }

   if (!(ie_val = ast_calloc(1, sizeof(*ie_val)))) {
      return -1;
   }

   ie_val->ie_type = ie_type;
   ie_val->ie_pltype = AST_EVENT_IE_PLTYPE_RAW;
   ie_val->raw_datalen = raw_datalen;

   if (!(ie_val->payload.raw = ast_malloc(raw_datalen))) {
      ast_free(ie_val);
      return -1;
   }

   memcpy(ie_val->payload.raw, data, raw_datalen);

   AST_LIST_INSERT_TAIL(&sub->ie_vals, ie_val, entry);

   return 0;
}

int ast_event_sub_append_ie_str	(	struct ast_event_sub *	sub,
		enum ast_event_ie_type	ie_type,
		const char *	str
	)

Append a string parameter to a subscription.

Parameters:

sub	the dynamic subscription allocated with ast_event_subscribe_new()
ie_type	the information element type for the parameter
str	the string that must be present in the event to match this subscription

Return values:

0	success
non-zero	failure

Since:

1.6.1

Definition at line 802 of file event.c.

References ast_calloc, AST_EVENT_IE_PLTYPE_STR, AST_EVENT_IE_TOTAL, ast_free, AST_LIST_INSERT_TAIL, ast_str_hash(), ast_strdup, ast_event_ie_val::hash, ast_event_ie_val::ie_pltype, ast_event_ie_val::ie_type, ast_event_sub::ie_vals, ast_event_ie_val::payload, and ast_event_ie_val::str.

Referenced by ast_event_subscribe(), and handle_devstate_change().

{
   struct ast_event_ie_val *ie_val;

   if (ie_type <= 0 || ie_type >= AST_EVENT_IE_TOTAL) {
      return -1;
   }

   if (!(ie_val = ast_calloc(1, sizeof(*ie_val)))) {
      return -1;
   }

   ie_val->ie_type = ie_type;
   ie_val->ie_pltype = AST_EVENT_IE_PLTYPE_STR;

   if (!(ie_val->payload.str = ast_strdup(str))) {
      ast_free(ie_val);
      return -1;
   }

   ie_val->payload.hash = ast_str_hash(str);

   AST_LIST_INSERT_TAIL(&sub->ie_vals, ie_val, entry);

   return 0;
}

int ast_event_sub_append_ie_uint	(	struct ast_event_sub *	sub,
		enum ast_event_ie_type	ie_type,
		uint32_t	uint
	)

Append a uint parameter to a subscription.

Parameters:

sub	the dynamic subscription allocated with ast_event_subscribe_new()
ie_type	the information element type for the parameter
uint	the value that must be present in the event to match this subscription

Return values:

0	success
non-zero	failure

Since:

1.6.1

Definition at line 737 of file event.c.

References ast_calloc, AST_EVENT_IE_PLTYPE_UINT, AST_EVENT_IE_TOTAL, AST_LIST_INSERT_TAIL, ast_event_ie_val::ie_pltype, ast_event_ie_val::ie_type, ast_event_sub::ie_vals, ast_event_ie_val::payload, and ast_event_ie_val::uint.

Referenced by ast_event_subscribe(), and handle_cli_status().

{
   struct ast_event_ie_val *ie_val;

   if (ie_type <= 0 || ie_type >= AST_EVENT_IE_TOTAL) {
      return -1;
   }

   if (!(ie_val = ast_calloc(1, sizeof(*ie_val)))) {
      return -1;
   }

   ie_val->ie_type = ie_type;
   ie_val->payload.uint = unsigned_int;
   ie_val->ie_pltype = AST_EVENT_IE_PLTYPE_UINT;

   AST_LIST_INSERT_TAIL(&sub->ie_vals, ie_val, entry);

   return 0;
}

void ast_event_sub_destroy

(

struct ast_event_sub *

sub

)

Destroy an allocated subscription.

Parameters:

sub	the subscription to destroy

This function should be used when a subscription is allocated with ast_event_subscribe_new(), but for some reason, you want to destroy it instead of activating it. This could be because of an error when reading in the configuration for the dynamically built subscription.

Since:

1.6.1

Definition at line 941 of file event.c.

References ast_event_ie_val_destroy(), ast_free, AST_LIST_REMOVE_HEAD, and ast_event_sub::ie_vals.

Referenced by ast_event_unsubscribe(), handle_cli_status(), and handle_devstate_change().

{
   struct ast_event_ie_val *ie_val;

   while ((ie_val = AST_LIST_REMOVE_HEAD(&sub->ie_vals, entry))) {
      ast_event_ie_val_destroy(ie_val);
   }

   ast_free(sub);
}

struct ast_event_sub* ast_event_subscribe	(	enum ast_event_type	event_type,
		ast_event_cb_t	cb,
		const char *	description,
		void *	userdata,
			...
	)		[read]

Subscribe to events.

Parameters:

event_type	The type of events to subscribe to
cb	The function to be called with events
description	Description of the subscription.
userdata	data to be passed to the event callback

The rest of the arguments to this function specify additional parameters for the subscription to filter which events are passed to this subscriber. The arguments must be in sets of:

    <enum ast_event_ie_type>, [enum ast_event_ie_pltype, [payload] ]

and must end with AST_EVENT_IE_END.

If the ie_type specified is *not* AST_EVENT_IE_END, then it must be followed by a valid IE payload type. If the payload type specified is AST_EVENT_IE_PLTYPE_EXISTS, then the 3rd argument should not be provided. Otherwise, a payload must also be specified.

Returns:

This returns a reference to the subscription for use with un-subscribing later. If there is a failure in creating the subscription, NULL will be returned.

Example usage:

 peer->mwi_event_sub = ast_event_subscribe(AST_EVENT_MWI, mwi_event_cb, peer,
     AST_EVENT_IE_MAILBOX, AST_EVENT_IE_PLTYPE_STR, peer->mailbox,
     AST_EVENT_IE_END);

This creates a subscription to AST_EVENT_MWI events that contain an information element, AST_EVENT_IE_MAILBOX, with the same string value contained in peer->mailbox. Also, the event callback will be passed a pointer to the peer.

Note:

A NULL description will cause this function to crash, so watch out!

Definition at line 879 of file event.c.

References ast_copy_string(), AST_EVENT_IE_END, AST_EVENT_IE_PLTYPE_BITFLAGS, AST_EVENT_IE_PLTYPE_EXISTS, AST_EVENT_IE_PLTYPE_RAW, AST_EVENT_IE_PLTYPE_STR, AST_EVENT_IE_PLTYPE_UINT, AST_EVENT_IE_PLTYPE_UNKNOWN, ast_event_sub_activate(), ast_event_sub_append_ie_bitflags(), ast_event_sub_append_ie_exists(), ast_event_sub_append_ie_raw(), ast_event_sub_append_ie_str(), ast_event_sub_append_ie_uint(), ast_event_subscribe_new(), ast_event_sub::description, and str.

Referenced by add_peer_mwi_subs(), add_publish_event(), aji_init_event_distribution(), ast_enable_distributed_devstate(), build_gateway(), build_peer(), cc_generic_agent_start_monitoring(), config_line(), create_new_generic_list(), load_module(), load_pbx(), mkintf(), network_change_event_subscribe(), sig_pri_start_pri(), and start_poll_thread().

{
   va_list ap;
   enum ast_event_ie_type ie_type;
   struct ast_event_sub *sub;

   if (!(sub = ast_event_subscribe_new(type, cb, userdata))) {
      return NULL;
   }

   ast_copy_string(sub->description, description, sizeof(sub->description));

   va_start(ap, userdata);
   for (ie_type = va_arg(ap, enum ast_event_ie_type);
      ie_type != AST_EVENT_IE_END;
      ie_type = va_arg(ap, enum ast_event_ie_type))
   {
      enum ast_event_ie_pltype ie_pltype;

      ie_pltype = va_arg(ap, enum ast_event_ie_pltype);

      switch (ie_pltype) {
      case AST_EVENT_IE_PLTYPE_UNKNOWN:
         break;
      case AST_EVENT_IE_PLTYPE_UINT:
      {
         uint32_t unsigned_int = va_arg(ap, uint32_t);
         ast_event_sub_append_ie_uint(sub, ie_type, unsigned_int);
         break;
      }
      case AST_EVENT_IE_PLTYPE_BITFLAGS:
      {
         uint32_t unsigned_int = va_arg(ap, uint32_t);
         ast_event_sub_append_ie_bitflags(sub, ie_type, unsigned_int);
         break;
      }
      case AST_EVENT_IE_PLTYPE_STR:
      {
         const char *str = va_arg(ap, const char *);
         ast_event_sub_append_ie_str(sub, ie_type, str);
         break;
      }
      case AST_EVENT_IE_PLTYPE_RAW:
      {
         void *data = va_arg(ap, void *);
         size_t data_len = va_arg(ap, size_t);
         ast_event_sub_append_ie_raw(sub, ie_type, data, data_len);
         break;
      }
      case AST_EVENT_IE_PLTYPE_EXISTS:
         ast_event_sub_append_ie_exists(sub, ie_type);
         break;
      }
   }
   va_end(ap);

   ast_event_sub_activate(sub);

   return sub;
}

struct ast_event_sub* ast_event_subscribe_new	(	enum ast_event_type	type,
		ast_event_cb_t	cb,
		void *	userdata
	)		[read]

Allocate a subscription, but do not activate it.

Parameters:

type	the event type to subscribe to
cb	the function to call when an event matches this subscription
userdata	data to pass to the provided callback

This function should be used when you want to dynamically build a subscription.

Returns:

the allocated subscription, or NULL on failure

Since:

1.6.1

Definition at line 715 of file event.c.

References ast_atomic_fetchadd_int(), ast_calloc, ast_log(), ast_event_sub::cb, LOG_ERROR, ast_event_sub::type, ast_event_sub::uniqueid, and ast_event_sub::userdata.

Referenced by ast_event_subscribe(), handle_cli_status(), and handle_devstate_change().

{
   struct ast_event_sub *sub;

   if (type < 0 || type >= AST_EVENT_TOTAL) {
      ast_log(LOG_ERROR, "%u is an invalid type!\n", type);
      return NULL;
   }

   if (!(sub = ast_calloc(1, sizeof(*sub)))) {
      return NULL;
   }

   sub->type = type;
   sub->cb = cb;
   sub->userdata = userdata;
   sub->uniqueid = ast_atomic_fetchadd_int((int *) &sub_uniqueid, 1);

   return sub;
}

const char* ast_event_subscriber_get_description

(

struct ast_event_sub *

sub

)

Get description for a subscription.

Parameters:

sub	subscription

Returns:

string description of the subscription

Definition at line 952 of file event.c.

References ast_event_sub::description.

{
   return sub ? sub->description : NULL;
}

struct ast_event_sub* ast_event_unsubscribe

(

struct ast_event_sub *

event_sub

)

[read]

Un-subscribe from events.

Parameters:

event_sub

This is the reference to the subscription returned by ast_event_subscribe.

This function will remove a subscription and free the associated data structures.

Returns:

NULL for convenience.

Version:

1.6.1 return changed to NULL

Definition at line 957 of file event.c.

References AST_DLLIST_REMOVE, ast_event_check_subscriber(), ast_event_destroy(), AST_EVENT_IE_DESCRIPTION, AST_EVENT_IE_END, AST_EVENT_IE_EVENTTYPE, AST_EVENT_IE_PLTYPE_STR, AST_EVENT_IE_PLTYPE_UINT, AST_EVENT_IE_UNIQUEID, ast_event_new(), ast_event_queue(), ast_event_sub_destroy(), AST_EVENT_SUB_NONE, ast_event_subs, AST_EVENT_UNSUB, AST_RWDLLIST_UNLOCK, AST_RWDLLIST_WRLOCK, ast_event_sub::description, ast_event_sub::type, and ast_event_sub::uniqueid.

Referenced by add_peer_mwi_subs(), cc_generic_agent_destructor(), destroy_dahdi_pvt(), destroy_endpoint(), destroy_mailbox(), generic_agent_devstate_unsubscribe(), generic_monitor_instance_list_destructor(), network_change_event_unsubscribe(), peer_destructor(), publish_event_destroy(), sig_pri_start_pri(), sig_pri_stop_pri(), stop_poll_thread(), and unload_module().

{
   struct ast_event *event;

   AST_RWDLLIST_WRLOCK(&ast_event_subs[sub->type]);
   AST_DLLIST_REMOVE(&ast_event_subs[sub->type], sub, entry);
   AST_RWDLLIST_UNLOCK(&ast_event_subs[sub->type]);

   if (ast_event_check_subscriber(AST_EVENT_UNSUB,
      AST_EVENT_IE_EVENTTYPE, AST_EVENT_IE_PLTYPE_UINT, sub->type,
      AST_EVENT_IE_END) != AST_EVENT_SUB_NONE) {

      event = ast_event_new(AST_EVENT_UNSUB,
         AST_EVENT_IE_UNIQUEID,    AST_EVENT_IE_PLTYPE_UINT, sub->uniqueid,
         AST_EVENT_IE_EVENTTYPE,   AST_EVENT_IE_PLTYPE_UINT, sub->type,
         AST_EVENT_IE_DESCRIPTION, AST_EVENT_IE_PLTYPE_STR, sub->description,
         AST_EVENT_IE_END);
      if (event && ast_event_queue(event)) {
         ast_event_destroy(event);
      }
   }

   ast_event_sub_destroy(sub);

   return NULL;
}