bool bt_mesh_rpl_check()

in nimble/host/mesh/src/rpl.c [104:156]

• 40 lines of code
• 13 McCabe index (conditional complexity)

bool bt_mesh_rpl_check(struct bt_mesh_net_rx *rx,
		struct bt_mesh_rpl **match)
{
	int i;

	/* Don't bother checking messages from ourselves */
	if (rx->net_if == BT_MESH_NET_IF_LOCAL) {
		return false;
	}

	/* The RPL is used only for the local node */
	if (!rx->local_match) {
		return false;
	}

	for (i = 0; i < ARRAY_SIZE(replay_list); i++) {
		struct bt_mesh_rpl *rpl = &replay_list[i];

		/* Empty slot */
		if (!rpl->src) {
			if (match) {
				*match = rpl;
			} else {
				bt_mesh_rpl_update(rpl, rx);
			}

			return false;
		}

		/* Existing slot for given address */
		if (rpl->src == rx->ctx.addr) {
			if (rx->old_iv && !rpl->old_iv) {
				return true;
			}

			if ((!rx->old_iv && rpl->old_iv) ||
			    rpl->seq < rx->seq) {
				if (match) {
					*match = rpl;
				} else {
					bt_mesh_rpl_update(rpl, rx);
				}

				return false;
			} else {
				return true;
			}
		}
	}

	BT_ERR("RPL is full!");
	return true;
}