This returns the available contingous space in the packet starting from
the current cursor position.
Signed-off-by: Christian Taedcke <christian.taedcke@lemonbeat.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>
using CONFIG_NET_BUF_POOL_USAGE monitor avail_count,
this variable should be protect.
Protecting it by using atomic variable
Signed-off-by: Ehud Naim <ehudn@marvell.com>
If we have removed first net_buf, then we must not restore the
original cursor as that will point to wrong head net_buf.
Add also unit test to check that the packets are removed
properly.
Clarify the documentation that we are removing data from
beginning of the function, also document that the cursor
is reset after this call.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
If net_pkt_pull() would cause an empty net_buf, then unref
those empty buffers from the list.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
net_pkt_clone() initializes the original packet cursor
and clone the packet. But it doesn't restore the cursor
back to original position.
Issue noticed when mDNS resolving fails when mdns responder
is also enabled.
net_conn_input(), in case of multicast packet, connection
handler clone the packet and deliver to matching handler.
Example case: dns_resolver and mdns_responder both register
handlers for 5353 port. After first clone original packet
cursor moved back to starting position. But first cloned
packet cursor is set properly. Second time cloning makes
cursor position to set to zero. Which makes second packet
handler header unpacking goes wrong.
Fixes#21970.
Signed-off-by: Ravi kumar Veeramally <ravikumar.veeramally@linux.intel.com>
IPv4 header options length will be stored in ipv4_opts_len
in net_pkt structure. Now IPv4 header length will be in
net_pkt ip_hdr_len + ipv4_opts_len. So modified relevant
places of ip header length calculation for IPv4.
Signed-off-by: Ravi kumar Veeramally <ravikumar.veeramally@linux.intel.com>
Calculate how long on average net_pkt has spent on its way from
application to the network device driver. The data is calculated
for all network packets and not just for UDP or TCP ones like in
RX statistics.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Calculate how long on average net_pkt has spent on its way from
network device driver to the application. The data is only
calculated for UDP and TCP network packets.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
We need to make sure that net_pkt_clone() sets cursor correctly.
This cursor position is needed so that we can skip IP header
for incoming packet properly. Not all applications need to know
the cursor position of the cloned packet. Unfortunately we cannot
know that in advance so just set the cursor to correct position in
the cloned packet.
Fixes#19135
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit implements net_pkt_shallow_clone. A shallow clone clones
the net_pkt but not the buffers. The buffers are only referenced and
therefor only freed when both copies of the net_pkt are freed.
Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
When net_pkt_skip skips the entire data in a net buffer, the cursor
still points to this buffer on data that is off by one.
Calling pkt_cursor_advance in net_pkt_is_contiguous fixes this and
moves the cursor to the next buffer.
Signed-off-by: Alexander Wachter <alexander.wachter@student.tugraz.at>
If the allocated net_pkt is larger than the network interface MTU,
then check if the IPv6 fragmentation is enabled and allow larger
net_pkt length as the IPv6 fragmentation will split the packet into
suitable parts.
Fixes#16354
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
The net_pkt_pull() needs to move all the remaining data in the
net_buf instead of just the pull amount.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
move misc/util.h to sys/util.h and
create a shim for backward-compatibility.
No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.
Related to #16539
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
In case socket offloading is used, one might want to disable native IP
stack, both IPv4 and IPv6, to save memory. Currently it is not possible
due to preprocessor check. Prevent that by adding additional exception
for socket offloading.
Signed-off-by: Robert Lubos <robert.lubos@nordicsemi.no>
Rename reserved function names in the subsys/ subdirectory except
for static _mod_pub_set and _mod_unbind functions in bluetooth mesh
cfg_srv.c which clash with the similarly named global functions.
Signed-off-by: Patrik Flykt <patrik.flykt@intel.com>
Seems like a useless attribute. Since net_context is not being used by
the user directly (socket is the unique interface now) and since no core
parts uses the token parameter of net_context API: let's remove the
attribute.
This helps to save 4 bytes from struct net_pkt.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Now that legacy - and unrelated - function named net_pkt_get_data has
been removed, we can rename net_pkt_get_data_new relevantly.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
That function was responsible for allocating new buffer element, but it
is now unused and can be removed safely. Buffer allocation is now done
via net_pkt_alloc_buffer().
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
This is meant for very particular use case as only logging uses that.
Where it makes entirely sense for it to send the logs through its own
slab/pool in order to not drain the core slabs/pools.
So enabling the new API to manage that. That has to be used with
net_context for the buffer pool. So one has to first allocate the
net_pkt from external slab, set the context and then (and only then)
allocate buffer. Basically, only net_context will uses that scheme
anyway.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
That can be useful on some tests which will not have any interface but
still allocate net_pkt. Also, one may allocate a packet with buffer not
knowing yet the interface it will be send through.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
There are issues using lowercase min and max macros when compiling a C++
application with a third-party toolchain such as GNU ARM Embedded when
using some STL headers i.e. <chrono>.
This is because there are actual C++ functions called min and max
defined in some of the STL headers and these macros interfere with them.
By changing the macros to UPPERCASE, which is consistent with almost all
other pre-processor macros this naming conflict is avoided.
All files that use these macros have been updated.
Signed-off-by: Carlos Stuart <carlosstuart1970@gmail.com>
Now that legacy net_pkt_pull function has been removed, the new
function can be renamed accordingly.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Now that the stack uses the new API from net_pkt for pulling, no need
to keep the legacy one around.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Now that legacy net_pkt_clone function has been removed, the new
function can be renamed accordingly.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
Now that the stack uses the new API from net_pkt for copying, no need
to keep the legacy one around.
Signed-off-by: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
