Fix 'u_char' undeclared on musl libc

On musl libc we get build errors with 'u_char' undeclared and

```
expected expression before ')' token
205 | btbb_pcap_dump(h->pcap_file, &pcap_pkt.pc

Fix 'u_char' undeclared on musl libc

On musl libc we get build errors with 'u_char' undeclared and

```
expected expression before ')' token
205 | btbb_pcap_dump(h->pcap_file, &pcap_pkt.pcap_header, (u_char *)&pcap_pkt.bredr_bb_header);
```

This PR fixes both the issues, one of the issue is caused by another.

Signed-off-by: brahmajit das <[email protected]>

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Use `DLT_BLUETOOTH_LE_LL` for PPI rather than `DLT_USER0`.

`DLT_USER*` is intended for private use. It requires extra configuration in
tools like Wireshark to make it actually work, and causes prob

Use `DLT_BLUETOOTH_LE_LL` for PPI rather than `DLT_USER0`.

`DLT_USER*` is intended for private use. It requires extra configuration in
tools like Wireshark to make it actually work, and causes problems for
Ubertooth users in other tools (eg: secdev/scapy#1673)

I don't have the hardware for this, so I cannot test this change.

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Fix pcap magic number for nanoseconds

The magic number in the pcap header should be 0xa1b23c4d for
nanosecond resolution pcap files. The previous value 0xa1b2c3d4
made wireshark show the wrong times

Fix pcap magic number for nanoseconds

The magic number in the pcap header should be 0xa1b23c4d for
nanosecond resolution pcap files. The previous value 0xa1b2c3d4
made wireshark show the wrong timestamp.

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Or bits not and

Fixed Payload present

Fixed the packet length?

Started logging the payloads to the output files

Fix uint types for non-OS X systems

Force PCAP on by default, and remove dependency from cmake

Fixes #34

Could probably use more testing

pcap: write PCAP directly from libbtbb without using libpcap

include assert.h so that call to assert() doesn't break the build

le: prevent buffer overflows on memcpy

closes #25
closes #26

warnings: kill (most) warnings with -Wall -Werror -Wextra

Silence build warnings and remove unused code

Fix pcap cmake optionato be ON/OFF
default is on, but it is not an error if pcap is not found

Modify btbb.h based on pcap support
- To inform ubertooth / gr-bluetooth pcap support

Add modulation/transport to packet data
- This should improve our mapping from packet -> pcap

Tidy / fix some PCAP / PCAPNG formatting code

pcap: flush each packet

le: prevent buffer overflow when memcpy'ing large-ish packets

Fix building against latest libpcap

le: correctly dump data into PCAP PPI format

There were two issues with this code. First, the length of the dump was
incorrect as it did not include fields not accounted for in LE LL
length. Second,

le: correctly dump data into PCAP PPI format

There were two issues with this code. First, the length of the dump was
incorrect as it did not include fields not accounted for in LE LL
length. Second, the code skipped dumping the PPI header.

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build: build on systems with libpcap 1.4 and earlier

Update to include storing captures in pcap and pcapng format for
LINKTYPE_BLUETOOTH_BREDR_BB and LINKTYPE_BLUETOOTH_LE_LL_WITH_PHDR.

Includes:
* Add support for BTLE access address validity determin

Update to include storing captures in pcap and pcapng format for
LINKTYPE_BLUETOOTH_BREDR_BB and LINKTYPE_BLUETOOTH_LE_LL_WITH_PHDR.

Includes:
* Add support for BTLE access address validity determination.
* Refactor BTLE support with accessors and opaque internals similar
to BR support.

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