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host/mesh: Missed IV update cannot be captured

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It seems that if the IV update is missed, a node cannot
recover it until the IV index has increased to a value
greater than Node's Last known IV + 1.

This is port of c1e053c9b3789b613771b68ba521b1b2585517c6
This commit is contained in:
Krzysztof Kopyściński
2021-11-10 06:24:00 +01:00
committed by Krzysztof Kopyściński
parent 2745cf4708
commit 267eed3ca7
1 changed files with 26 additions and 16 deletions
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nimble/host/mesh/src/net.c
+26 -16
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@@ -85,6 +85,15 @@ struct bt_mesh_net bt_mesh = {
.local_queue = STAILQ_HEAD_INITIALIZER(bt_mesh.local_queue),
};
/* Mesh Profile Specification 3.10.6
* The node shall not execute more than one IV Index Recovery within a period of
* 192 hours.
*
* Mark that the IV Index Recovery has been done to prevent two recoveries to be
* done before a normal IV Index update has been completed within 96h+96h.
*/
static bool ivi_was_recovered;
static struct os_mbuf_pool loopback_os_mbuf_pool;
static struct os_mempool loopback_buf_mempool;
os_membuf_t loopback_mbuf_membuf[
@@ -259,24 +268,24 @@ bool bt_mesh_net_iv_update(uint32_t iv_index, bool iv_update)
return false;
}
if (iv_index > bt_mesh.iv_index + 1) {
if ((iv_index > bt_mesh.iv_index + 1) ||
(iv_index == bt_mesh.iv_index + 1 && !iv_update)) {
if (ivi_was_recovered) {
BT_ERR("IV Index Recovery before minimum delay");
return false;
}
/* The Mesh profile specification allows to initiate an
* IV Index Recovery procedure if previous IV update has
* been missed. This allows the node to remain
* functional.
*/
BT_WARN("Performing IV Index Recovery");
ivi_was_recovered = true;
bt_mesh_rpl_clear();
bt_mesh.iv_index = iv_index;
bt_mesh.seq = 0;
goto do_update;
}
if (iv_index == bt_mesh.iv_index + 1 && !iv_update) {
BT_WARN("Ignoring new index in normal mode");
return false;
}
if (!iv_update) {
/* Nothing to do */
BT_DBG("Already in Normal state");
return false;
}
}
if (!(IS_ENABLED(CONFIG_BT_MESH_IV_UPDATE_TEST) &&
@@ -294,21 +303,22 @@ bool bt_mesh_net_iv_update(uint32_t iv_index, bool iv_update)
return false;
}
do_update:
atomic_set_bit_to(bt_mesh.flags, BT_MESH_IVU_IN_PROGRESS, iv_update);
bt_mesh.ivu_duration = 0U;
if (iv_update) {
bt_mesh.iv_index = iv_index;
BT_DBG("IV Update state entered. New index 0x%08x",
(unsigned) bt_mesh.iv_index);
bt_mesh_rpl_reset();
ivi_was_recovered = false;
} else {
BT_DBG("Normal mode entered");
bt_mesh.seq = 0;
}
do_update:
atomic_set_bit_to(bt_mesh.flags, BT_MESH_IVU_IN_PROGRESS, iv_update);
bt_mesh.ivu_duration = 0U;
k_work_reschedule(&bt_mesh.ivu_timer, BT_MESH_IVU_TIMEOUT);
/* Notify other modules */