remove __packed attribute from struct ieee80211_radiotap_header
and all the structures that include it.

this should not change anything while avoiding packed vs alignment
warnings from GCC 8, and potentially pessimised code generation
due to the packed marker (there are no misaligned members, just
that the per-device parts may end unaligned.)

all consumers of these members are done from the properly aligned
packet members directly, or, as a union with a 64 byte member,
also properly aligned. codegen didn't appear to change, except
for the definition of sizeof(struct driver_[rt]x_radiotap_header)
in debug info, which is not directly used anywhere.

branches: 1.24.56;
Remove duplicate definitions which break the build.

fix botched line break. How did this even compile for me?

sync with FreeBSD rev 1.11. No binary changes.

branches: 1.21.4; 1.21.6; 1.21.8;
Drop 3rd and 4th clauses from David Young's license.
Reviewed and approved by dyoung@ (copyright holder).

Replace most gcc-specific __attribute__ uses with BSD-style sys/cdef.h
preprocessor macros.

- trailing commas in enums
- arithmetic on enums needs cast
from Anon Ymous

branches: 1.18.28; 1.18.30; 1.18.34; 1.18.36; 1.18.38; 1.18.40;
Reference the right flag,
s/IEEE80211_RADIOTAP_F_FCS/IEEE80211_RADIOTAP_F_BADFCS/.

Define four new radiotap fields per discussions with John Bicket, Sam
Leffler, and others:

IEEE80211_RADIOTAP_RX_FLAGS = 14,
IEEE80211_RADIOTAP_TX_FLAGS = 15,
IEEE80211_RADIOTAP_RTS_RETRIES = 16,
IEEE80211_RADIOTAP_DATA_RETRIES = 17,

I describe the fields in the manual page and in comments in the
header file (cross-referenced by the manual page).

branches: 1.16.2; 1.16.6; 1.16.8; 1.16.10;
Add a hint to the compiler that the radiotap header requires 8-byte
alignment. This

1 helps GCC make better code for architectures such as ARM
where it would otherwise do a lot of byte-loads and shifts
to load a multi-byte word, and

2 ensures that the compiler will add no padding between a
radiotap header and a 64-bit or narrower field that
follows it.

branches: 1.15.10;
Note in radiotap header file and manual page that radiotap fields
are little-endian. Fix wi(4) and atw(4) to reflect this fact.

branches: 1.14.4; 1.14.6; 1.14.8; 1.14.10;
Multiple inclusion protection, as suggested by christos@ on tech-kern@
few days ago.

Add flag IEEE80211_RADIOTAP_F_BADFCS for packets whose checksum
doesn't match their contents. While I'm here, remove the mention
of field IEEE80211_RADIOTAP_FCS, which wasn't adopted.

Resolve conflicts.

branches: 1.11.2;
Resolve conflicts in importation of 18-May-2005 ath(4) / net80211(9)
from FreeBSD. Introduce compatibility shims (sys/dev/ic/ath_netbsd.[ch],
sys/net80211/ieee80211_netbsd.[ch]). Update drivers (an, atu, atw,
awi, ipw, iwi, rtw, wi) for the new net80211(9) API.

Fix a typo.

branches: 1.9.2;
Define IEEE80211_RADIOTAP_HDRLEN, the length of a radiotap header.

Sync with FreeBSD. Some apps get confused when the FCS comes at
the end of the tapped frame, so stick it into the radiotap header.

Add missing flags IEEE80211_CHAN_DYN and IEEE80211_CHAN_GFSK, needed
by userland programs to interpret radiotap channel indications.

Whitespace nits, esp. change #define<SPACE> to #define<TAB>.

Forget the tcpdump $Header$.

Updates to 802.11 radiotap. The _DB_ flags were used everywhere to
denote a signed dBm Rx power, so rename them to _DBM_ and change
the signedness. Add new _DB_ flags for unsigned Rx power measured
from an arbitrary reference.

Try to synchronize net80211/ieee80211_radiotap.h with my tcpdump
sources (which public tcpdump has not seen, yet) and with FreeBSD.

Add data-link type DLT_IEEE802_11_RADIO to wi and atw. DLT_IEEE802_11_RADIO
lets you monitor radio stats like received signal strength, which
diversity antenna was used, channel/frequency, modulation, and data
rate.

Insert RCSIDs.

branches: 1.1.1;
Initial revision