int bt_mesh_provision()

in nimble/host/mesh/src/mesh.c [46:126]
60 lines of code
12 McCabe index (conditional complexity)

int bt_mesh_provision(const uint8_t net_key[16], uint16_t net_idx,
		      uint8_t flags, uint32_t iv_index, uint16_t addr,
		      const uint8_t dev_key[16])
{
	int err;

	BT_INFO("Primary Element: 0x%04x", addr);
	BT_DBG("net_idx 0x%04x flags 0x%02x iv_index 0x%04x",
	       net_idx, flags, (unsigned) iv_index);

	if (atomic_test_and_set_bit(bt_mesh.flags, BT_MESH_VALID)) {
		return -EALREADY;
	}

	/*
	 * FIXME:
	 * Should net_key and iv_index be over-ridden?
	 */
	if (IS_ENABLED(CONFIG_BT_MESH_CDB) &&
	    atomic_test_bit(bt_mesh_cdb.flags, BT_MESH_CDB_VALID)) {
		const struct bt_mesh_comp *comp;
		const struct bt_mesh_prov *prov;
		struct bt_mesh_cdb_node *node;

		comp = bt_mesh_comp_get();
		if (comp == NULL) {
			BT_ERR("Failed to get node composition");
			atomic_clear_bit(bt_mesh.flags, BT_MESH_VALID);
			return -EINVAL;
		}

		if (!bt_mesh_cdb_subnet_get(net_idx)) {
			BT_ERR("No subnet with idx %d", net_idx);
			atomic_clear_bit(bt_mesh.flags, BT_MESH_VALID);
			return -ENOENT;
		}

		prov = bt_mesh_prov_get();
		node = bt_mesh_cdb_node_alloc(prov->uuid, addr,
					      comp->elem_count, net_idx);
		if (node == NULL) {
			BT_ERR("Failed to allocate database node");
			atomic_clear_bit(bt_mesh.flags, BT_MESH_VALID);
			return -ENOMEM;
		}

		addr = node->addr;
		iv_index = bt_mesh_cdb.iv_index;
		memcpy(node->dev_key, dev_key, 16);

		if (IS_ENABLED(CONFIG_BT_SETTINGS)) {
			bt_mesh_cdb_node_store(node);
		}
	}

	err = bt_mesh_net_create(net_idx, flags, net_key, iv_index);
	if (err) {
		atomic_clear_bit(bt_mesh.flags, BT_MESH_VALID);

		return err;
	}

	bt_mesh.seq = 0;

	bt_mesh_comp_provision(addr);

	memcpy(bt_mesh.dev_key, dev_key, 16);

	if (IS_ENABLED(CONFIG_BT_MESH_LOW_POWER) &&
		IS_ENABLED(CONFIG_BT_MESH_LPN_SUB_ALL_NODES_ADDR)) {
			bt_mesh_lpn_group_add(BT_MESH_ADDR_ALL_NODES);
	}

	if (IS_ENABLED(CONFIG_BT_SETTINGS)) {
		bt_mesh_net_pending_net_store();
	}

	bt_mesh_start();

	return 0;
}