There was no close method implemented for AF_PACKET type
sockets. This meant that calling close() on packet socket
caused NULL pointer access.
This will allow #32949 issue to work properly.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
OpenThread UART tx callback has been processed even if it was not
triggered by OpenThread otPlatUartSend function.
Signed-off-by: Lukasz Maciejonczyk <lukasz.maciejonczyk@nordicsemi.no>
Implement MSG_WAITALL flag for stream sockets. Setting this flag on
`recv()` call will make it wait until the requested amount of data is
received.
In case both, MSG_WAITALL all is set and SO_RCVTIMEO option configured
on a socket, follow the Linux behavior, i. e. when the requested amount
of data is not received until the timeout expires, return the data
received so far w/o an error.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
If there is no timeout, the connect will timeout immediately
and the connection is not established.
Fixes#33185
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
DHCPv4 client code needs to know information when network
interfaces are going down and up. So make sure that network
management config options are enabled in that case.
Fixes#33137
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Add option to disable validation callback support by setting the
validation buffer size to 0, which allows to save some memory in case
it's not needed.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Add a data validation callback to the resource structure, which can be
registered by an application. It allows to verify the data before
actually modifying the resource data.
If the callback is registered for a resource, the data is decoded into a
temporary buffer first, and only copied into the actual resource buffer
if the validation is successfull. If no validation is required (and thus
no callback registered) the resource value is decoded directly into the
resource buffer, as it used to be.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Mention that it's "data offset" in 32-bit words. Helpful when doing
code review and using search for "th_off".
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
If CONFIG_NET_TCP_ISN_RFC6528 is disabled, then mbedtls include
files are not available so check this.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Verify the result of option encoding while forming Deregister message
instead of silently ignoring it.
Coverity ID: 215373
Fixes#33096
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Calculate Initial Sequence Number (ISN) as described in RFC 6528
https://tools.ietf.org/html/rfc6528
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
The address pointer cannot be null at this point so remove
the checks.
Coverity-CID: 219595
Fixes#33071
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
check_interface resets the counter semaphore, but
net_config_init_by_iface first calls check_interface, then inits
the semaphore.
Initialize the semaphore up front to allow the k_sem_reset call
to work properly.
Signed-off-by: James Harris <james.harris@intel.com>
Currently there is no way to distinguish between a caller
explicitly asking for a semaphore with a limit that
happens to be `UINT_MAX` and a semaphore that just
has a limit "as large as possible".
Add `K_SEM_MAX_LIMIT`, currently defined to `UINT_MAX`, and akin
to `K_FOREVER` versus just passing some very large wait time.
In addition, the `k_sem_*` APIs were type-confused, where
the internal data structure was `uint32_t`, but the APIs took
and returned `unsigned int`. This changes the underlying data
structure to also use `unsigned int`, as changing the APIs
would be a (potentially) breaking change.
These changes are backwards-compatible, but it is strongly suggested
to take a quick scan for `k_sem_init` and `K_SEM_DEFINE` calls with
`UINT_MAX` (or `UINT32_MAX`) and replace them with `K_SEM_MAX_LIMIT`
where appropriate.
Signed-off-by: James Harris <james.harris@intel.com>
Add NET_HEXDUMP_DBG/ERR/WARN/INFO macros, then use them for new
MQTT_HEXDUMP_TRC/ERR/WARN/INFO macros.
Log struct mqtt_utf8 using MQTT_HEXDUMP_TRC. One cannot safely log
mqtt_utf8 strings due to no guarantee of a NULL terminator being
present. Also, logging without log_strdup() as if it were a NULL
terminated string asserts when CONFIG_LOG_IMMEDIATE=n. This solves
both issues.
Signed-off-by: Pete Skeggs <peter.skeggs@nordicsemi.no>
Uses of k_work_pending are to be replaced by k_work_is_pending which
conforms to current proposed naming guidelines.
Switch to the new function.
Also initialize the private work structure at build time, rather than
on each iteration (it is not permitted to invoke work API on an
uninitialized work item).
The implementation here is racy: that a work item is pending does not
mean changes since it was first submitted are guaranteed to be seen
when the work item begins (began) executing.
A better solution would be to have transmit_message be able to
determine whether there is unprocessed work. Then the work item can
be submitted unconditionally.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Uses of k_work_pending are to be replaced by k_work_is_pending which
conforms to current proposed naming guidelines.
Both uses in this file are fragile: that a work item is pending does
not mean changes since it was first submitted are guaranteed to be
seen when the work item begins (began) executing.
As long as this module is expected to be replaced by tcp2 it doesn't
seem worth trying to fix the logic, so just switch to the new function
name.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Checking whether a work item is pending before submitting it is racy:
the item may be finishing up in its handler, and essentially
completed, in which case chosing not to resubmit would leave work
unhandled.
In this case it appears very wrong, since the sole call site in
net_if.c has just initialized the work item, which is not permitted if
the work item is pending.
Remove the check.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
The compiler generates a warning regarding a variable being used
w/o being initialized in certian configuration. According to the logic
that's not the case, so just add some initial value to the variable to
silence the compiler.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
As network interface array size might be larger than the actual
network interface count, check this condition and ignore those
interfaces that are not in use.
We cannot know for certain how many network interfaces there
are at built time, as the total count is only available at runtime.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
The network interface index is very useful info to see in
debug prints so add those to debug output.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
If we are sending a network packet and if the remote address
is not set in the context (which means that connect() has not
been called), then we must set the target network interface
to a proper value.
This is done so that when we select the local source address,
we might select the wrong interface if we have multiple network
interfaces in the system. In this case the packet would be always
assigned to first network interface regardless of the destination
address.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Now that the old API has been reimplemented with the new API remove
the old implementation and its tests.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
The tcp2 infrastructure is using the legacy delayed work API, and
relies heavily on the transient state indicated by an estimate of
delayed time remaining to determine whether a delayed work item is
still active. While the wrappers for this work in most cases, one use
is unsanctioned: directly accessing the fields of k_delayed_work
structure to satisfy the calling parameters of the handler when
invoked directly.
The chosen solution for this specific need in the new API is to use a
schedule (rather than reschedule) operation, which leaves any previous
timer unchanged but allows immediate submission if the work is idle.
This changes behavior in that the resend is delegated to the work
queue, rather than done immediately. The former behavior can be
supported by further refactoring that turns the work handler into a
wrapper around a function that takes a connection reference, and
invoking that here, while the handler invokes it after reconstructing
the connection from the contained work item.
For now put in a hack that also uses the non-public fields of the
delayed work structure to implement the required behavior. The
complete fix if this solution is used requires replacing all use of
k_delayed_work in this module with k_work_delayable, leveraging the
new functionality of the API to avoid having to guess about the true
state of a work item based on its transient timer or flag states.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This lets an application detect when a PPP connection fails to establish
or terminates, so that the connection can be reattempted (for example,
by setting carrier off and on).
Signed-off-by: Jim Paris <jim@jim.sh>
In case the endpoint string provided by the application is longer or
equal to CLIENT_EP_LEN - 1, the strncpy() function will not add the NULL
terminator. As the endpoint buffer is treated as a C-string in other
places in the code, make sure it's NULL terminated by adding NULL
explicitly at the end of the buffer.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Make sure query string used by the lwm2m_rd_client is large enough to
encode any query string that can be sent during bootstrap/registration.
As the maximum query string length is related to the endpoint name,
which is limited by `CONFIG_LWM2M_RD_CLIENT_ENDPOINT_NAME_MAX_LENGTH`,
make the query string corellated to the value of this config.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
This commit adds to network shell set of basic commands for UDP
protocol to receive and send datagrams.
Signed-off-by: Hubert Miś <hubert.mis@nordicsemi.no>
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Check NULL value when we are trying to print link address
because the link address can be null.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
As the input string can be allocated from stack, we need to use
log_strdup() in net_pkt_hexdump() to print the extra string.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This returns the available contingous space in the packet starting from
the current cursor position.
Signed-off-by: Christian Taedcke <christian.taedcke@lemonbeat.com>
Avoid splitting lines when possible while keeping length below 100
chars. Some other minor style corrections.
Signed-off-by: Eduardo Montoya <eduardo.montoya@nordicsemi.no>
The use of a single error variable for RX and TX operations has
shown the OpenThread code to be asserting in some conditions.
This commit splits tx_rx_result into rx_result and tx_result
to avoid such cases.
Signed-off-by: Eduardo Montoya <eduardo.montoya@nordicsemi.no>
If the network interface is down when trying to send a message,
return -ENETDOWN as we cannot send a message in this case.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit fixes some edge cases when using net_bufs with reserved
bytes (headroom) as fragments of a net_pkt.
Signed-off-by: Reto Schneider <reto.schneider@husqvarnagroup.com>
net_buf_max_len() provides the maximum number of bytes which can be put
behind the data pointer. This provides a save alternative to using the
size field of the net_buf structure directly, which does not take the
reserved bytes (headroom) into account.
This commit also replaces the usage of the size field in places where
size got used directly. Code has not been adjusted when it is easy to
recognise that the buffer does not have any reserved bytes, which is the
case after allocation or reset. Same goes for the faulty usage by
net_pkt as exposed by the last commit and begin fixed by a separate
commit.
Even though it would be cleaner, I decided to not rename the size field
to e.g. __buf_size in order to keep the amount of code changes low.
Signed-off-by: Reto Schneider <reto.schneider@husqvarnagroup.com>
Added 3 utility functions :
- lwm2m_engine_update_period_service() which updates the period of a
given service.
- lwm2m_engine_update_period_min_observer() which updates the
min_period_sec for a given observe node.
- lwm2m_engine_update_period_max_observer() which updates the
max_period_sec for a given observe node.
Signed-off-by: Thomas LE ROUX <thomas.leroux@smile.fr>
* Added implementations of otPlatCAlloc and otPlatFree methods
necessary for the OpenThread in case of using EXTERNAL_HEAP.
* Added CONFIG_OPENTHREAD_DNSSD_SERVER option to allow enabling
OT_DNSS_SERVER feature.
Signed-off-by: Kamil Kasperczyk <kamil.kasperczyk@nordicsemi.no>
If user sets CONFIG_NUM_PREEMPT_PRIORITIES=0, then the priority
of the net_mgmt thread will be -1 which is the same as idle thread.
This will trigger assert in kernel as then the minimum coop priority
is -2 in this case. Remove the net_mgmt thread priority setting from
Kconfig file as it is low value and set the coop thread priority
the same way as other network threads are doing it.
Fixes#32375
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This patch adds implementation of socket option used to get
protocol used for given socket (e.g. IPPROTO_TCP). This option
is not defined in POSIX, but it is Linux extension.
Signed-off-by: Hubert Miś <hubert.mis@nordicsemi.no>
This patch adds implementation of socket option used to get
type of given socket (e.g. SOCK_STREAM).
Signed-off-by: Hubert Miś <hubert.mis@nordicsemi.no>
Remove `OPENTHREAD_CONFIG_NCP_BUFFER_SIZE` define since it does not
exist in OpenThread.
Signed-off-by: Eduardo Montoya <eduardo.montoya@nordicsemi.no>
If userspace is enabled, then the TLS context needs to be
made a NET_SOCKET kernel object. Without this the userspace
cannot access TLS sockets.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
When handling CoAP Confirmable requests, there is a common
Acknowledgement initialization procedure that repeats for each
response packet initialization. This patch adds a function that
simplifies Acknowledgement initialization procedure encapsulating
repeating code.
Signed-off-by: Hubert Miś <hubert.mis@nordicsemi.no>
Current 6lo implementation is unable to deal with scattered headers
(which should not happen usually, though it's a valid use case), so
let's just fail uncompressing such packet then.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Bogus fragmented packet could be sent without a FRAG1 fragment and hit
reassembly. Let's make sure this does not happen.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
In case the current packet is the same as the cached one, let's not
unreference it while clearing the cache.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Though ACK frames are not meant to reach L2 (drivers must ensure this
never happens), let's "re-enforce" the L2 by dropping them.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
All addressing mode but IEEE802154_ADDR_MODE_NONE should have a valid
address. If not, the frame is invalid.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
This patch replaces magic numbers with COAP_TOKEN_MAX_LEN value and
removes unnecessary castings of token buffer type.
Signed-off-by: Hubert Miś <hubert.mis@nordicsemi.no>
RFC 7252 (CoAP) specifies value of the Version (Ver) field in the
protocol header to value 1. This patch defines value of the Version
field to make packet initialization easier. All samples and tests
are updated to use the new COAP_VERSION_1 field when initializing
a CoAP packet.
Signed-off-by: Hubert Miś <hubert.mis@nordicsemi.no>
When pushing received data to the application, check that app
was able to receive the data. If the application already closed
the socket, then we must free the received net_pkt in order to
avoid memory leak.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
If we cannot allocate net_pkt or net_buf, then check this condition
properly and release other resources that were already allocated.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
We need to make sure that when listening a connection establishment,
the connection gets cleared if we do not receive final ACK.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
CoAP RFC (RFC7252) states that end points should support
the CoRE Link Format of discoverable resources as described in RFC6690
(refer section 7.2 of the RFC7252).
Fixes#31609
Signed-off-by: Kasun Hewage <kasun.ch@gmail.com>
After the latest upmerge, OpenThread requires explicit configuration
of the Master Key. This commit adds a Kconfig symbol that can be
used to setup its value. By default no Master Key is configured and
OpenThread generates a random one.
The Sockets Echo samples are configured with a fixed key with this
commit.
Signed-off-by: Eduardo Montoya <eduardo.montoya@nordicsemi.no>
Only start the network logging backend if the autostarting
option CONFIG_LOG_BACKEND_NET_AUTOSTART is enabled.
Also, call init to make sure that the backend is initialized
properly.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Token and payload are appended from data buffers to a CoAP packet
being encoded. Keyword const was missing for parameters in functions
appending these parts to a packet.
Now token and paylod can be copied to CoAP packet from constant
buffers, that can be stored in ROM.
Signed-off-by: Hubert Miś <hubert.mis@nordicsemi.no>
This patch introduces COAP_TOKEN_MAX_LEN definition in coap.h file.
This definition replaces magic number across CoAP protocol
implementation and CoAP samples.
Signed-off-by: Hubert Miś <hubert.mis@nordicsemi.no>
This enables to use net_buf_append_bytes without passing an allocator in
which case the code would attempt to use the net_buf_pool of the
original buffer.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
CoAP protocol defines registry of Content-Format option values.
This patch adds this enumeration to coap header file to make it
available to all applications using CoAP protocol. It modifies
code using CoAP service to use new enumeration.
Signed-off-by: Hubert Miś <hubert.mis@nordicsemi.no>
Add Kconfig option to randomize the initial ACK timeout, as specified in
RFC 7252. The option is enabled by default.
Additionally, finetune the default value of COAP_INIT_ACK_TIMEOUT_MS
option, to match the default ACK_TIMEOUT value specified by the RFC
7252. The RFC does not specify the minimum/maximum value of the
ACK_TIMEOUT parameter, but only suggests it should be no lower than 1
second, so adjust the option range to reflect this.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Introduce retransmission counter to the coap_pending structure. This
allows to simplify the retransmission logic and allows to keep track of
the number of remaining retranmissions.
Additionally, extend the `coap_pending_init()` function with `retries`
parameter, which allows to set the retransmission count individually for
each confirmable transaction.
Fixes#28117
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Multi-instance resources shall report its dimension (number of
resource instances) on discovery. Since it was not possible to tell
simply on the instance count whether the resource is multi-instance or
not (there could be a multi-instance resource with only one instance
avaialble) add a new parameter to the structure representing resource,
indicating whether it's multi-instance or not.
Add dimension information to the discovery result.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Remove any references of Bootstrap Discovery from Device Management
Discovery procedure and fix some of it's logic following the
specification.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Bootstrap discovery was not implemented properly in the LwM2M engine.
Although, there were some indications in the source code that it is
implemented, it was not done according to spec (and actually broken).
Given that Bootstrap Discovery procedure differs a lot from the regular
Device Management Discovery (different permissions, different
information returned), it's easier to implement it as a separate
function (`bootstrap_discovery()`) instead of making the existing
`do_discovery_op()` function even more complicated.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
This commit improves portability somewhat on machines where sizeof
(int) is less than sizeof (void *). Note that the implementation is
still not portable and will fail when you start using addresses which
can not be represented by "int cast to unsigned int".
On RISC-V 64-bit with RAM on 0x80000000 we previously got hit by
E: Exception cause Load access fault (5)
ld s0,16(a0)
a0: 0xffffffff80025610
(The int should probably be changed to intptr_t if possible.)
Signed-off-by: Martin Åberg <martin.aberg@gaisler.com>
This patch brings support for AF_PACKET and SOCK_RAW type of sockets.
In net_conn_input() function the new flag has been introduced -
'raw_pkt_continue' to indicate if there are other than AF_PACKET
connections registered.
If we do not have other connections than AF_PACKET, the packet is
solely handled in net_conn_input() (or to be more specific in its
helper function - conn_raw_socket()).
Otherwise, it is passed back to net_conn_input in IPv4/6 processing.
Signed-off-by: Lukasz Majewski <lukma@denx.de>
The new function - namely conn_raw_socket(); has been introduced to
handle raw sockets processing. Its code, up till now, only was
executed when IS_ENABLED(CONFIG_NET_SOCKETS_PACKET) was defined.
After this change it can be reused when one would like to handle
raw sockets also when CONFIG_NET_{UDP|TCP} are enabled.
Signed-off-by: Lukasz Majewski <lukma@denx.de>
Add a check to stop a multicast address to be registered multiple times.
This can happen if the application is using net_if_ipv6_maddr_add()
directly.
Tested on the existing bluetooth/ipsp sample:
<wrn> net_if: Multicast address ff02::1 is is already registered.
Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
6lowpan over BLE should work without solicit node multicast messages
according to RFC7668[1], but that requires Neighbor Solicitation with
Address Registration Option, which is currently not implemented in
either Zephyr or Linux. This is causing the router to fallback to normal
neighbor solicitation based discovery, but the NS frames are being
discarded in the host stack because the solicit node multicast groups
are not registered.
This drops the NET_L2_MULTICAST_SKIP_JOIN_SOLICIT_NODE as a workaround
and adds a TODO about it.
[1] https://tools.ietf.org/html/rfc7668#section-3.2.3
Signed-off-by: Fabio Baltieri <fabio.baltieri@gmail.com>
Add Kconfig option NET_HOSTNAME_UNIQUE_UPDATE to allow the unique
hostname - which is derived from the network interface's link
address - to be updated on both initial assignment and updates of
the link address.
Signed-off-by: Markus Fuchs <markus.fuchs@de.sauter-bc.com>
`delta_size` was incorrectly used to assess whether extended option
length field shall be used. In result, options larger than 268 bytes
were not encoded properly.
Fixes#31206
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
The #if statement used IS_ENABLED to check if it was defined.
IS_ENABLED will only return true if the value is 1, and false otherwise.
If the NET_TCP_MAX_SEND_WINDOW_SIZE value would be e.g. 8, then the
check would fail.
Signed-off-by: Emil Gydesen <emil.gydesen@nordicsemi.no>
If we receive data that is out-of-order, queue sequential
TCP segments until we have received earlier segment or a timeout
happens.
Note that we only queue data sequentially in current version i.e.,
there should be no holes in the queue. For example, if we receive
SEQs 5,4,3,6 and are waiting SEQ 2, the data in segments 3,4,5,6 is
queued (in this order), and then given to application when we receive
SEQ 2. But if we receive SEQs 5,4,3,7 then the SEQ 7 is discarded
because the list would not be sequential as number 6 is be missing.
Fixes#30364
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Modifies openthread shim layer to automatically join multicast
addresses as they are added to zephyr from openthread, unless the
address is interface-local or link-local. This allows incoming
openthread multicast group messages to avoid being filtered by
zephyr ipv6 recv.
Fixes#31085
Signed-off-by: Joel Frazier <frazieje@gmail.com>
The LwM2M firmware pull object no longer uses the system workqueue
to execute firmware_transfer(), but directly executes it itself.
Previously, the workqueue would be blocked because firmware_transfer()
indirectly calls a blocking connect(). This would lead to problems
with e.g. modem drivers that use UART to interface with the modem
hardware, as some UART drivers use the workqueue.
Fixes#31053.
Signed-off-by: Maik Vermeulen <maik.vermeulen@innotractor.com>
As the tcp header struct can be cast to unaligned memory, mark
it as packed and access fields using UNALIGNED_GET/PUT when
needed.
Fixes#31145
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Both RS and DAD timeouts are simplified because the delay is a
constant, and by construction the list of timeouts is in increasing
time remaining.
Refactor to avoid repeating the expression that represents the time
until DAD state expires. Uniformly use unsigned operands in deadline
calculation.
Note a case where the racy idiom for retaining an existing timeout is
required in the current work API, but can be replaced with a robust
solution in the proposed new API (the reschedule API replaces any
existing pending update, but the schedule API will leave an existing
scheduled submission in place).
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
The existing implementation is inconsistent in that checking for
expired routers when a timeout is processed detects end-of-life
correctly (when the remaining duration exceeds the signed maximum),
but the calculation of time remaining before expiration uses only
unsigned calculation. So when the set of routers is changed the newly
calculated timeout will not recognize routers that have expired, and
so those routers expired late. In the worst case if the only
remaining router had expired the timer may be set for almost two
months in the future.
Refactor to calculate remaining time in one place and as a signed
value. Change a function name to more clearly reflect what it does.
Avoid unnecessary race conditions in k_work API.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
The net_timeout structure is documented to exist because of behavior
that is no longer true, i.e. that `k_delayed_work_submit()` supports
only delays up to INT32_MAX milliseconds. Nonetheless, use of 32-bit
timestamps within the work handlers mean the restriction is still
present.
This infrastructure is currently used for two timers with long
durations:
* address for IPv6 addresses
* prefix for IPv6 prefixes
The handling of rollover was subtly different between these: address
wraps reset the start time while prefix wraps did not.
The calculation of remaining time in ipv6_nbr was incorrect when the
original requested time in seconds was a multiple of
NET_TIMEOUT_MAX_VALUE: the remainder value would be zero while the
wrap counter was positive, causing the calculation to indicate no time
remained.
The maximum value was set to allow a 100 ms latency between elapse of
the deadline and assessment of a given timer, but detection of
rollover assumed that the captured time in the work handler was
precisely the expected deadline, which is unlikely to be true. Use of
the shared system work queue also risks observed latency exceeding 100
ms. These calculations could produce delays to next event that
exceeded the maximum delay, which introduced special cases.
Refactor so all operations that use this structure are encapsulated
into API that is documented and has a full-coverage unit test. Switch
to the standard mechanism of detecting completed deadlines by
calculating the signed difference between the deadline and the current
time, which eliminates some special cases.
Uniformly rely on the scanning the set of timers to determine the next
deadline, rather than assuming that the most recent update is always
next.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
Adds a new family of `struct net_buf` operations that remove data from
the end of the buffer.
The semantics of `net_buf_remove_mem` have been chosen to match those of
`net_buf_pull_mem`, i.e. the return value is a pointer to the memory
that was removed.
The opposite of this function, `net_buf_remove`, would need to return
the old end of the data buffer to be useful. However this value is
always an invalid target for reading or writing data to (It points to
the middle of unused data).The existance of the function would be
misleading, therefore it is not implemented.
Fixes#31069.
Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
