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ifconfig.8: Add capability codes descriptions from handbook

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We document capability codes (the CAPS field of "ifconfig wlan0 scan")
in both ifconfig(8) and the handbook. The list is more complete in the
manual page, while the descriptions of individual capabilities are more
detailed in the handbook.

In order to reduce content duplication and bit rot, let's move
handbook's details to the manual page and reference the manual page
whenever necessary.

Reviewed by:	debdrup
Reviewed by:	Pau Amma
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D34662
This commit is contained in:
Mateusz Piotrowski 2022-03-29 13:11:46 +02:00
parent fd126a732c
commit 05621e0b20
1 changed files with 16 additions and 4 deletions
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20
sbin/ifconfig/ifconfig.8
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@ -28,7 +28,7 @@
.\" From: @(#)ifconfig.8 8.3 (Berkeley) 1/5/94
.\" $FreeBSD$
.\"
.Dd November 8, 2021
.Dd March 29, 2022
.Dt IFCONFIG 8
.Os
.Sh NAME
@ -1515,7 +1515,7 @@ with a
.Cm scan
request or through background scanning.
Depending on the capabilities of the stations the following
flags can be included in the output:
flags (capability codes) can be included in the output:
.Bl -tag -width 3n
.It Li A
Channel agility.
@ -1527,21 +1527,33 @@ Poll request capability.
DSSS/OFDM capability.
.It Li E
Extended Service Set (ESS).
Indicates that the station is part of an infrastructure network
rather than an IBSS/ad-hoc network.
.It Li I
Independent Basic Service Set (IBSS).
Indicates that the station is part of an ad-hoc network
rather than an ESS network.
.It Li P
Privacy capability.
The station requires authentication.
The station requires authentication and encryption
for all data frames exchanged within the BSS using cryptographic means
such as WEP, TKIP, or AES-CCMP.
.It Li R
Robust Secure Network (RSN).
.It Li S
Short Preamble.
Indicates that the station is doing short preamble to optionally
Indicates that the network is using short preambles,
defined in 802.11b High Rate/DSSS PHY,
and utilizes a 56 bit sync field
rather than the 128 bit field used in long preamble mode.
Short preambles are used to optionally
improve throughput performance with 802.11g and 802.11b.
.It Li c
Pollable capability.
.It Li s
Short slot time capability.
Indicates that the 802.11g network is using a short slot time
because there are no legacy (802.11b) stations present.
.El
.Pp
By default interesting information elements captured from the neighboring