Checking for overflow of integer addition by comparing against one of
the arguments of the addition does not work when the result of the
addition is automatically promoted to a larger type.
Fix by using an explicit cast to make sure that the result of the
addition is not implicitly converted to a larger type.
In situations with high packet loss, if all sync packets are lost, conflicting
subnets will be configured.
If the network is static, this can be prevented by always using the highest number
of subnets that has been observed.
This assumes no nodes are physically added / removed from the network.
Synchronize the RPL thread updating the RPL netstats with the RPL
shell command reading it by disabling IRQs. This will prevent printing
corrupted data on non-32bit platforms as well as printing inconsistent
data (e.g. TX count of old state in conjunction with TX bytes of new
state) for all platforms.
Co-authored-by: Martine Lenders <mail@martine-lenders.eu>
There is a repeating pattern in the struct that is split out into a
subtype in this commit. This makes handling the data easier, as now
done in the print routine.
In a881af8b08 we would return early if the subnet did not change,
but we must still send the router advertisement with the route information
option to the upstream network, otherwise hosts in that network will not
consider the downstream subnet off-link.
This is required for Linux to accept the RIO
with this patch:
2001:db8:8000::/33 via fe80::d0e7:ffff:fe46:6b52 dev tap0 proto ra metric 1024 expires 86338sec pref medium
2001:db8::/32 dev tap0 proto kernel metric 256 pref medium
before:
2001:db8::/32 dev tap0 proto kernel metric 256 pref medium
If we get a large (e.g. /62) prefix from e.g. DHCPv6, we can split it
into subnets automatically to configure downstream interfaces.
This allows for automatic configuration of daisy-chained nodes or
nodes connected in a tree topology.
To enable the feature, a new pseudo-module `gnrc_ipv6_auto_subnets` is
provided.
When gnrc_rpl_init was called from a thread with higher priority than
the RPL thread, the initializer's call to gnrc_netreg_register would be
executed before the event loop even had a chance to set up its message
queue.
The added short-lived lock makes it work from threads of any priority.
This changes the prefixes of the symbols generated from USEMODULE and
USEPKG variables. The changes are as follow:
KCONFIG_MODULE_ => KCONFIG_USEMODULE_
KCONFIG_PKG_ => KCONFIG_USEPKG_
MODULE_ => USEMODULE_
PKG_ => USEPKG_
On receiving a DIO message, RPL sets the lifetime for the default
route and the parent timeout event to the value. This leads to short
amounts of time whem the node looses its default route, while it
handles the parent timeout event to probe its parent.
This commit fixes this by adding time the node needs for probing
to the default route lifetime.
