Bluetooth: Add initial implementation of BIS connections

This adds initial support for BIS/BIG which includes:

== Broadcaster role: Setup a periodic advertising and create a BIG ==

> tools/isotest -s 00:00:00:00:00:00
isotest[63]: Connected [00:00:00:00:00:00]
isotest[63]: QoS BIG 0x00 BIS 0x00 Packing 0x00 Framing 0x00]
isotest[63]: Output QoS [Interval 10000 us Latency 10 ms SDU 40 PHY 0x02
RTN 2]
isotest[63]: Sending ...
isotest[63]: Number of packets: 1
isotest[63]: Socket jitter buffer: 80 buffer
< HCI Command: LE Set Perio.. (0x08|0x003e) plen 7
...
> HCI Event: Command Complete (0x0e) plen 4
LE Set Periodic Advertising Parameters (0x08|0x003e) ncmd 1
Status: Success (0x00)
< HCI Command: LE Set Perio.. (0x08|0x003f) plen 7
...
> HCI Event: Command Complete (0x0e) plen 4
LE Set Periodic Advertising Data (0x08|0x003f) ncmd 1
Status: Success (0x00)
< HCI Command: LE Set Perio.. (0x08|0x0040) plen 2
...
> HCI Event: Command Complete (0x0e) plen 4
LE Set Periodic Advertising Enable (0x08|0x0040) ncmd 1
Status: Success (0x00)
< HCI Command: LE Create B.. (0x08|0x0068) plen 31
...
> HCI Event: Command Status (0x0f) plen 4
LE Create Broadcast Isochronous Group (0x08|0x0068) ncmd 1
Status: Success (0x00)
> HCI Event: LE Meta Event (0x3e) plen 21
LE Broadcast Isochronous Group Complete (0x1b)
...

== Broadcast Receiver role: Create a PA Sync and BIG Sync ==

> tools/isotest -i hci1 -d 00:AA:01:00:00:00
isotest[66]: Waiting for connection 00:AA:01:00:00:00...
< HCI Command: LE Periodic Advert.. (0x08|0x0044) plen 14
...
> HCI Event: Command Status (0x0f) plen 4
LE Periodic Advertising Create Sync (0x08|0x0044) ncmd 1
Status: Success (0x00)
< HCI Command: LE Set Extended Sca.. (0x08|0x0041) plen 8
...
> HCI Event: Command Complete (0x0e) plen 4
LE Set Extended Scan Parameters (0x08|0x0041) ncmd 1
Status: Success (0x00)
< HCI Command: LE Set Extended Sca.. (0x08|0x0042) plen 6
...
> HCI Event: Command Complete (0x0e) plen 4
LE Set Extended Scan Enable (0x08|0x0042) ncmd 1
Status: Success (0x00)
> HCI Event: LE Meta Event (0x3e) plen 29
LE Extended Advertising Report (0x0d)
...
> HCI Event: LE Meta Event (0x3e) plen 16
LE Periodic Advertising Sync Established (0x0e)
...
< HCI Command: LE Broadcast Isoch.. (0x08|0x006b) plen 25
...
> HCI Event: Command Status (0x0f) plen 4
LE Broadcast Isochronous Group Create Sync (0x08|0x006b) ncmd 1
Status: Success (0x00)
> HCI Event: LE Meta Event (0x3e) plen 17
LE Broadcast Isochronous Group Sync Estabilished (0x1d)
...

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

Bluetooth: eir: Add helpers for managing service data

This adds helpers for accessing and appending service data (0x16) ad
type.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

Bluetooth: Improve skb handling in mgmt_device_connected()

This patch introduce eir_skb_put_data() that can be used to simplify
operations on eir in goal of eliminating the necessity of intermediary
buffers.
eir_skb_put_data() is in pair to what eir_append_data() does with help of
eir_len, but without awkwardness when passing return value to skb_put() (as
it returns updated offset not size).

Signed-off-by: Radoslaw Biernacki <rad@semihalf.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

Bluetooth: Fix skb allocation in mgmt_remote_name() & mgmt_device_connected()

This patch fixes skb allocation, as lack of space for ev might push skb
tail beyond its end.
Also introduce eir_precalc_len() that can be used instead of magic
numbers for similar eir operations on skb.

Fixes: cf1bce1de7eeb ("Bluetooth: mgmt: Make use of mgmt_send_event_skb in MGMT_EV_DEVICE_FOUND")
Fixes: e96741437ef0a ("Bluetooth: mgmt: Make use of mgmt_send_event_skb in MGMT_EV_DEVICE_CONNECTED")
Signed-off-by: Angela Czubak <acz@semihalf.com>
Signed-off-by: Marek Maslanka <mm@semihalf.com>
Signed-off-by: Radoslaw Biernacki <rad@semihalf.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

net: Don't include filter.h from net/sock.h

sock.h is pretty heavily used (5k objects rebuilt on x86 after
it's touched). We can drop the include of filter.h from it and
add a forward declaration of struct sk_filter instead.
This decreases the number of rebuilt objects when bpf.h
is touched from ~5k to ~1k.

There's a lot of missing includes this was masking. Primarily
in networking tho, this time.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Acked-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/bpf/20211229004913.513372-1-kuba@kernel.org

Bluetooth: eir: Move EIR/Adv Data functions to its own file

This moves functions manipulating EIR/Adv Data to its own file so it
can be reused by other files.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>