doc: release: 2.7: Add release notes for networking

Networking

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* 802.15.4 L2:

  * Fixed a bug, where the net_pkt structure contained invalid LL address

    pointers after being processed by 802.15.4 L2.

  * Added an optional destination address filtering in the 802.15.4 L2.

* CoAP:

  * Added ``user_data`` field to the :c:struct:`coap_packet` structure.

  * Fixed processing of out-of-order notifications.

  * Fixed :c:func:`coap_packet_get_payload` function.

  * Converted CoAP test suite to ztest API.

  * Improved :c:func:`coap_packet_get_payload` function to minimize number

    of RNG calls.

  * Fixed retransmissions in the ``coap_server`` sample.

  * Fixed observer removal in the ``coap_server`` sample (on notification

    timeout).

* DHCPv4:

  * Fixed a bug, where DHPCv4 library removed statically configured gateway

    before obtaining a new one from the server.

* DNS:

  * Fixed a bug, where the same IP address was used to populate the result

    address info entries, when multiple IP addresses were obtained from the

    server.

* HTTP:

  * Switched the library to use ``zsock_*`` API, to improve compatibility with

    various POSIX configurations.

  * Fixed a bug, where ``HTTP_DATA_FINAL`` notification was triggered even for

    intermediate response fragments.

* IPv4:

* IPv6:

  * Multiple IPv6 fixes, addressing failures in IPv6Ready compliance tests.

* LwM2M:

  * Added support for notification timeout reporting to the application.

  * Fixed a bug, where a multi instance resource with only one active instance

    was incorrectly encoded on reads.

  * Fixed a bug, where notifications were generated on changes to non-readable

    resources.

  * Added mutex protection  for the state variable of the ``lwm2m_rd_client``

    module.

  * Removed LWM2M_RES_TYPE_U64 type, as it's not possible to encode it properly

    for large values.

  * Fixed a bug, where large unsigned integers were incorrectly encoded in TLV.

  * Multiple fixes for FLOAT type processing in the LwM2M engine and encoders.

  * Fix a bug, where IPSO Push Button counter resource was not triggering

    notification on incrementation.

  * Fixed a bug, where Register failures were reported as success to the

    application.

* Misc:

  * Added RX/TX timeout on a socket in ``big_http_download`` sample.

  * Introduced :c:func:`net_pkt_remove_tail` function.

    Added IEEE 802.15.4 security-related flags to the :c:struct:`net_pkt`

    structure.

  * Added bridging support to the Ethernet L2.

  * Fixed a bug in mDNS, where an incorrect address type could be set as a

    response destination.

  * Added an option to suppress ICMP destination unreachable errors.

  * Fixed possible assertion in ``net nbr`` shell command.

  * Major refactoring of the TFTP library.

* MQTT:

  * Added an option to register a custom transport type.

  * Fixed a bug in :c:func:`mqtt_abort`, where the function could return without

    releasing a lock.

* OpenThread:

  * Update OpenThread module up to commit ``9ea34d1e2053b6b2a80e1d46b65a6aee99fc504a``.

    Added several new Kconfig options to align with new OpenThread

    configurations.

  * Added OpenThread API mutex protection during initialization.

  * Converted OpenThread thread to a dedicated work queue.

  * Implemented missing :c:func:`otPlatAssertFail` platform function.

  * Fixed a bug, where NONE level OpenThread logs were not processed.

  * Added possibility to disable CSL sampling, when used.

  * Fixed a potential bug, where invalid error code could be returned by the

    platform radio layer to OpenThread.

  * Reworked UART configuration in the OpenThread Coprocessor sample.

* Socket:

  * Added microsecond accuracy in :c:func:`zsock_select` function.

  * Reworked :c:func:`zsock_select` into a syscall.

  * Fixed a bug, where :c:func:`poll` events were not signalled correctly

    for socketpair sockets.

  * Fixed a bug, where socket mutex could be used after being initialized by a

    new owner after being deallocated in :c:func:`zsock_close`.

  * Fixed a possible assert after enabling CAN sockets.

  * Fixed IPPROTO_RAW usage in packet socket implementation.

* TCP:

  * Fixed a bug, where ``unacked_len`` could be set to a negative value.

  * Fixed possible assertion failure in :c:func:`tcp_send_data`.

  * Fixed a bug, where [FIN, PSH, ACK] was not handled properly in

    TCP_FIN_WAIT_2 state.

* TLS:

  * Reworked TLS sockets to use secure random generator from Zephyr.

  * Fixed busy looping during DTLS handshake with offloaded sockets.

  * Fixed busy looping during TLS/DTLS handshake on non blocking sockets.

  * Reset mbed TLS session on timed out DTLS handshake, to allow a retry without

    closing a socket.

  * Fixed TLS/DTLS :c:func:`sendmsg` implementation for larger payloads.

  * Fixed TLS/DTLS sockets ``POLLHUP`` notification.

* WebSocket:

  * Fixed :c:func:`poll` implementation for WebSocket, which did not work

    correctly with offloaded sockets.

  * Fixed :c:func:`ioctl` implementation for WebSocket, which did not work

    correctly with offloaded sockets.

USB

***