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Message-Id: <015916acf01942ca53453444aa48f70e7bfa5221.1588261997.git.mchehab+huawei@kernel.org>
Date: Thu, 30 Apr 2020 18:03:59 +0200
From: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To: Linux Doc Mailing List <linux-doc@...r.kernel.org>
Cc: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Johannes Berg <johannes@...solutions.net>,
netdev@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: [PATCH 04/37] docs: networking: convert mac80211-injection.txt to ReST
- add SPDX header;
- adjust title markup;
- mark code blocks and literals as such;
- mark tables as such;
- adjust identation, whitespaces and blank lines;
- add to networking/index.rst.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
Documentation/networking/index.rst | 1 +
...1-injection.txt => mac80211-injection.rst} | 39 ++++++++++++-------
MAINTAINERS | 2 +-
net/mac80211/tx.c | 2 +-
4 files changed, 27 insertions(+), 17 deletions(-)
rename Documentation/networking/{mac80211-injection.txt => mac80211-injection.rst} (68%)
diff --git a/Documentation/networking/index.rst b/Documentation/networking/index.rst
index b3608b177a8b..81c1834bfb57 100644
--- a/Documentation/networking/index.rst
+++ b/Documentation/networking/index.rst
@@ -77,6 +77,7 @@ Contents:
l2tp
lapb-module
ltpc
+ mac80211-injection
.. only:: subproject and html
diff --git a/Documentation/networking/mac80211-injection.txt b/Documentation/networking/mac80211-injection.rst
similarity index 68%
rename from Documentation/networking/mac80211-injection.txt
rename to Documentation/networking/mac80211-injection.rst
index d58d78df9ca2..75d4edcae852 100644
--- a/Documentation/networking/mac80211-injection.txt
+++ b/Documentation/networking/mac80211-injection.rst
@@ -1,9 +1,12 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=========================================
How to use packet injection with mac80211
=========================================
mac80211 now allows arbitrary packets to be injected down any Monitor Mode
interface from userland. The packet you inject needs to be composed in the
-following format:
+following format::
[ radiotap header ]
[ ieee80211 header ]
@@ -18,15 +21,19 @@ radiotap headers and used to control injection:
* IEEE80211_RADIOTAP_FLAGS
- IEEE80211_RADIOTAP_F_FCS: FCS will be removed and recalculated
- IEEE80211_RADIOTAP_F_WEP: frame will be encrypted if key available
- IEEE80211_RADIOTAP_F_FRAG: frame will be fragmented if longer than the
+ ========================= ===========================================
+ IEEE80211_RADIOTAP_F_FCS FCS will be removed and recalculated
+ IEEE80211_RADIOTAP_F_WEP frame will be encrypted if key available
+ IEEE80211_RADIOTAP_F_FRAG frame will be fragmented if longer than the
current fragmentation threshold.
+ ========================= ===========================================
* IEEE80211_RADIOTAP_TX_FLAGS
- IEEE80211_RADIOTAP_F_TX_NOACK: frame should be sent without waiting for
+ ============================= ========================================
+ IEEE80211_RADIOTAP_F_TX_NOACK frame should be sent without waiting for
an ACK even if it is a unicast frame
+ ============================= ========================================
* IEEE80211_RADIOTAP_RATE
@@ -37,8 +44,10 @@ radiotap headers and used to control injection:
HT rate for the transmission (only for devices without own rate control).
Also some flags are parsed
- IEEE80211_RADIOTAP_MCS_SGI: use short guard interval
- IEEE80211_RADIOTAP_MCS_BW_40: send in HT40 mode
+ ============================ ========================
+ IEEE80211_RADIOTAP_MCS_SGI use short guard interval
+ IEEE80211_RADIOTAP_MCS_BW_40 send in HT40 mode
+ ============================ ========================
* IEEE80211_RADIOTAP_DATA_RETRIES
@@ -51,17 +60,17 @@ radiotap headers and used to control injection:
without own rate control). Also other fields are parsed
flags field
- IEEE80211_RADIOTAP_VHT_FLAG_SGI: use short guard interval
+ IEEE80211_RADIOTAP_VHT_FLAG_SGI: use short guard interval
bandwidth field
- 1: send using 40MHz channel width
- 4: send using 80MHz channel width
- 11: send using 160MHz channel width
+ * 1: send using 40MHz channel width
+ * 4: send using 80MHz channel width
+ * 11: send using 160MHz channel width
The injection code can also skip all other currently defined radiotap fields
facilitating replay of captured radiotap headers directly.
-Here is an example valid radiotap header defining some parameters
+Here is an example valid radiotap header defining some parameters::
0x00, 0x00, // <-- radiotap version
0x0b, 0x00, // <- radiotap header length
@@ -71,7 +80,7 @@ Here is an example valid radiotap header defining some parameters
0x01 //<-- antenna
The ieee80211 header follows immediately afterwards, looking for example like
-this:
+this::
0x08, 0x01, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
@@ -84,10 +93,10 @@ Then lastly there is the payload.
After composing the packet contents, it is sent by send()-ing it to a logical
mac80211 interface that is in Monitor mode. Libpcap can also be used,
(which is easier than doing the work to bind the socket to the right
-interface), along the following lines:
+interface), along the following lines:::
ppcap = pcap_open_live(szInterfaceName, 800, 1, 20, szErrbuf);
-...
+ ...
r = pcap_inject(ppcap, u8aSendBuffer, nLength);
You can also find a link to a complete inject application here:
diff --git a/MAINTAINERS b/MAINTAINERS
index 0db63acd07b0..1546ecb855b5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10112,7 +10112,7 @@ S: Maintained
W: https://wireless.wiki.kernel.org/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git
T: git git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next.git
-F: Documentation/networking/mac80211-injection.txt
+F: Documentation/networking/mac80211-injection.rst
F: Documentation/networking/mac80211_hwsim/mac80211_hwsim.rst
F: drivers/net/wireless/mac80211_hwsim.[ch]
F: include/net/mac80211.h
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 6dad67eb60b2..47f460c8bd74 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -2144,7 +2144,7 @@ static bool ieee80211_parse_tx_radiotap(struct ieee80211_local *local,
/*
* Please update the file
- * Documentation/networking/mac80211-injection.txt
+ * Documentation/networking/mac80211-injection.rst
* when parsing new fields here.
*/
--
2.25.4
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