Trickle Timer Library¶
Overview¶
The Trickle timer library implements IETF RFC6206 (Trickle Algorithm).
The Trickle algorithm allows nodes in a lossy shared medium (e.g., low-power and lossy networks) to exchange information in a highly robust, energy efficient, simple, and scalable manner.
API Reference¶
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group
trickle Trickle algorithm library.
Typedefs
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typedef void (*
net_trickle_cb_t)(struct net_trickle *trickle, bool do_suppress, void *user_data)¶ Trickle timer callback.
The callback is called after Trickle timeout expires.
- Parameters
trickle – The trickle context to use.
do_suppress – Is TX allowed (true) or not (false).
user_data – The user data given in net_trickle_start() call.
Functions
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int
net_trickle_create(struct net_trickle *trickle, uint32_t Imin, uint8_t Imax, uint8_t k)¶ Create a Trickle timer.
- Parameters
trickle – Pointer to Trickle struct.
Imin – Imin configuration parameter in ms.
Imax – Max number of doublings.
k – Redundancy constant parameter. See RFC 6206 for details.
- Returns
Return 0 if ok and <0 if error.
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int
net_trickle_start(struct net_trickle *trickle, net_trickle_cb_t cb, void *user_data)¶ Start a Trickle timer.
- Parameters
trickle – Pointer to Trickle struct.
cb – User callback to call at time T within the current trickle interval
user_data – User pointer that is passed to callback.
- Returns
Return 0 if ok and <0 if error.
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int
net_trickle_stop(struct net_trickle *trickle)¶ Stop a Trickle timer.
- Parameters
trickle – Pointer to Trickle struct.
- Returns
Return 0 if ok and <0 if error.
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void
net_trickle_consistency(struct net_trickle *trickle)¶ To be called by the protocol handler when it hears a consistent network transmission.
- Parameters
trickle – Pointer to Trickle struct.
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void
net_trickle_inconsistency(struct net_trickle *trickle)¶ To be called by the protocol handler when it hears an inconsistent network transmission.
- Parameters
trickle – Pointer to Trickle struct.
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static inline bool
net_trickle_is_running(struct net_trickle *trickle)¶ Check if the Trickle timer is running or not.
- Parameters
trickle – Pointer to Trickle struct.
- Returns
Return True if timer is running and False if not.
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struct
net_trickle¶ - #include <trickle.h>
The variable names are taken directly from RFC 6206 when applicable. Note that the struct members should not be accessed directly but only via the Trickle API.
Public Members
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uint32_t
Imin¶ Min interval size in ms
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uint8_t
Imax¶ Max number of doublings
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uint8_t
k¶ Redundancy constant
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uint32_t
I¶ Current interval size
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uint32_t
Istart¶ Start of the interval in ms
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uint8_t
c¶ Consistency counter
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uint32_t
Imax_abs¶ Max interval size in ms (not doublings)
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net_trickle_cb_t
cb¶ Callback to be called when timer expires
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uint32_t
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typedef void (*