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RPL: support for run-time selection of the OF. RPL_OF_OCP defines the OF to be advertised at the root, while RPL_SUPPORTED_OFS defines the set of supported OFs

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Simon Duquennoy 2015-11-29 21:48:06 +01:00 • committed by Simon Duquennoy
parent c5cf8608e9
commit cd76b4b1c2
4 changed files with 60 additions and 26 deletions
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21
core/net/rpl/rpl-private.h
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@ -144,11 +144,28 @@
((unsigned long)(instance)->lifetime_unit * (lifetime))
#ifndef RPL_CONF_MIN_HOPRANKINC
/* RFC6550 defines the default MIN_HOPRANKINC as 256.
* However, we use MRHOF as a default Objective Function (RFC6719),
* which recommends setting MIN_HOPRANKINC with care, in particular
* when used with ETX as a metric. ETX is computed as a fixed point
* real with a divisor of 128 (RFC6719, RFC6551). We choose to also
* use 128 for RPL_MIN_HOPRANKINC, resulting in a rank equal to the
* ETX path cost. Larger values may also be desirable, as discussed
* in section 6.1 of RFC6719. */
#if RPL_OF_OCP == RPL_OCP_MRHOF
#define RPL_MIN_HOPRANKINC 128
#else /* RPL_OF_OCP == RPL_OCP_MRHOF */
#define RPL_MIN_HOPRANKINC 256
#else
#endif /* RPL_OF_OCP == RPL_OCP_MRHOF */
#else /* RPL_CONF_MIN_HOPRANKINC */
#define RPL_MIN_HOPRANKINC RPL_CONF_MIN_HOPRANKINC
#endif
#endif /* RPL_CONF_MIN_HOPRANKINC */
#ifndef RPL_CONF_MAX_RANKINC
#define RPL_MAX_RANKINC (7 * RPL_MIN_HOPRANKINC)
#else /* RPL_CONF_MAX_RANKINC */
#define RPL_MAX_RANKINC RPL_CONF_MAX_RANKINC
#endif /* RPL_CONF_MAX_RANKINC */
#define DAG_RANK(fixpt_rank, instance) \
((fixpt_rank) / (instance)->min_hoprankinc)