libcoap  4.2.1
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1 /*
2  * async.h -- state management for asynchronous messages
3  *
4  * Copyright (C) 2010-2011 Olaf Bergmann <>
5  *
6  * This file is part of the CoAP library libcoap. Please see README for terms
7  * of use.
8  */
15 #ifndef COAP_ASYNC_H_
16 #define COAP_ASYNC_H_
18 #include "net.h"
20 #ifndef WITHOUT_ASYNC
31 typedef struct coap_async_state_t {
32  unsigned char flags;
45  void *appdata;
49  size_t tokenlen;
53 /* Definitions for Async Status Flags These flags can be used to control the
54  * behaviour of asynchronous response generation.
55  */
56 #define COAP_ASYNC_CONFIRM 0x01
57 #define COAP_ASYNC_SEPARATE 0x02
58 #define COAP_ASYNC_OBSERVED 0x04
86  coap_pdu_t *request,
87  unsigned char flags,
88  void *data);
106 int coap_remove_async(coap_context_t *context,
108  coap_tid_t id,
109  coap_async_state_t **s);
118 void
146 #endif /* WITHOUT_ASYNC */
148 #endif /* COAP_ASYNC_H_ */
coap_tick_t created
Holds the internal time when the object was registered with a resource.
Definition: async.h:39
void * appdata
This field can be used to register opaque application data with the asynchronous state object...
Definition: async.h:45
int coap_tid_t
coap_tid_t is used to store CoAP transaction id, i.e.
Definition: pdu.h:238
unsigned char flags
holds the flags to control behaviour
Definition: async.h:32
COAP_STATIC_INLINE void coap_touch_async(coap_async_state_t *s)
Updates the time stamp of s.
Definition: async.h:142
coap_tid_t id
transaction id
Definition: async.h:47
coap_session_t * session
transaction session
Definition: async.h:46
structure for CoAP PDUs token, if any, follows the fixed size header, then options until payload mark...
Definition: pdu.h:287
struct coap_async_state_t coap_async_state_t
uint64_t coap_tick_t
This data type represents internal timer ticks with COAP_TICKS_PER_SECOND resolution.
Definition: coap_time.h:93
coap_async_state_t * coap_register_async(coap_context_t *context, coap_session_t *session, coap_pdu_t *request, unsigned char flags, void *data)
Allocates a new coap_async_state_t object and fills its fields according to the given request...
Definition: async.c:30
int coap_remove_async(coap_context_t *context, coap_session_t *session, coap_tid_t id, coap_async_state_t **s)
Removes the state object identified by id from context.
Definition: async.c:84
void coap_ticks(coap_tick_t *t)
Sets t to the internal time with COAP_TICKS_PER_SECOND resolution.
Definition: libcoap.h:38
coap_async_state_t * coap_find_async(coap_context_t *context, coap_session_t *session, coap_tid_t id)
Retrieves the object identified by id from the list of asynchronous transactions that are registered ...
Definition: async.c:77
void coap_free_async(coap_async_state_t *state)
Releases the memory that was allocated by coap_async_state_init() for the object s.
Definition: async.c:96
uint8_t token[8]
the token to use in a response
Definition: async.h:50
size_t tokenlen
length of the token
Definition: async.h:49
struct coap_async_state_t * next
internally used for linking
Definition: async.h:48
unsigned char uint8_t
Definition: uthash.h:79
The CoAP stack&#39;s global state is stored in a coap_context_t object.
Definition: net.h:147