docs: networking: convert radiotap-headers.txt to ReST

- add SPDX header;
- adjust title markup;
- mark code blocks and literals as such;
- adjust identation, whitespaces and blank lines where needed;
- add to networking/index.rst.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/networking/index.rst b/Documentation/networking/index.rst
index 0da7eb0..85bc52d 100644 (file)
--- a/Documentation/networking/index.rst
+++ b/Documentation/networking/index.rst
@@ -95,6 +95,7 @@ Contents:
    plip
    ppp_generic
    proc_net_tcp
+   radiotap-headers
 
 .. only::  subproject and html
 

diff --git a/Documentation/networking/mac80211-injection.rst b/Documentation/networking/mac80211-injection.rst
index 75d4edc..be65f88 100644 (file)
--- a/Documentation/networking/mac80211-injection.rst
+++ b/Documentation/networking/mac80211-injection.rst
@@ -13,7 +13,7 @@ following format::
  [ payload ]
 
 The radiotap format is discussed in
-./Documentation/networking/radiotap-headers.txt.
+./Documentation/networking/radiotap-headers.rst.
 
 Despite many radiotap parameters being currently defined, most only make sense
 to appear on received packets.  The following information is parsed from the

diff --git a/Documentation/networking/radiotap-headers.txt b/Documentation/networking/radiotap-headers.rst
similarity index 70%
rename from Documentation/networking/radiotap-headers.txt
rename to Documentation/networking/radiotap-headers.rst
index 953331c..1a1bd1e 100644 (file)
--- a/Documentation/networking/radiotap-headers.txt
+++ b/Documentation/networking/radiotap-headers.rst
@@ -1,3 +1,6 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+===========================
 How to use radiotap headers
 ===========================
 
@@ -5,9 +8,9 @@ Pointer to the radiotap include file
 ------------------------------------
 
 Radiotap headers are variable-length and extensible, you can get most of the
-information you need to know on them from:
+information you need to know on them from::
 
-./include/net/ieee80211_radiotap.h
+    ./include/net/ieee80211_radiotap.h
 
 This document gives an overview and warns on some corner cases.
 
@@ -21,6 +24,8 @@ of the it_present member of ieee80211_radiotap_header is set, it means that
 the header for argument index 0 (IEEE80211_RADIOTAP_TSFT) is present in the
 argument area.
 
+::
+
    < 8-byte ieee80211_radiotap_header >
    [ <possible argument bitmap extensions ... > ]
    [ <argument> ... ]
@@ -76,6 +81,8 @@ ieee80211_radiotap_header.
 Example valid radiotap header
 -----------------------------
 
+::
+
        0x00, 0x00, // <-- radiotap version + pad byte
        0x0b, 0x00, // <- radiotap header length
        0x04, 0x0c, 0x00, 0x00, // <-- bitmap
@@ -89,64 +96,64 @@ Using the Radiotap Parser
 
 If you are having to parse a radiotap struct, you can radically simplify the
 job by using the radiotap parser that lives in net/wireless/radiotap.c and has
-its prototypes available in include/net/cfg80211.h.  You use it like this:
+its prototypes available in include/net/cfg80211.h.  You use it like this::
 
-#include <net/cfg80211.h>
+    #include <net/cfg80211.h>
 
-/* buf points to the start of the radiotap header part */
+    /* buf points to the start of the radiotap header part */
 
-int MyFunction(u8 * buf, int buflen)
-{
-       int pkt_rate_100kHz = 0, antenna = 0, pwr = 0;
-       struct ieee80211_radiotap_iterator iterator;
-       int ret = ieee80211_radiotap_iterator_init(&iterator, buf, buflen);
+    int MyFunction(u8 * buf, int buflen)
+    {
+           int pkt_rate_100kHz = 0, antenna = 0, pwr = 0;
+           struct ieee80211_radiotap_iterator iterator;
+           int ret = ieee80211_radiotap_iterator_init(&iterator, buf, buflen);
 
-       while (!ret) {
+           while (!ret) {
 
-               ret = ieee80211_radiotap_iterator_next(&iterator);
+                   ret = ieee80211_radiotap_iterator_next(&iterator);
 
-               if (ret)
-                       continue;
+                   if (ret)
+                           continue;
 
-               /* see if this argument is something we can use */
+                   /* see if this argument is something we can use */
 
-               switch (iterator.this_arg_index) {
-               /*
-                * You must take care when dereferencing iterator.this_arg
-                * for multibyte types... the pointer is not aligned.  Use
-                * get_unaligned((type *)iterator.this_arg) to dereference
-                * iterator.this_arg for type "type" safely on all arches.
-                */
-               case IEEE80211_RADIOTAP_RATE:
-                       /* radiotap "rate" u8 is in
-                        * 500kbps units, eg, 0x02=1Mbps
-                        */
-                       pkt_rate_100kHz = (*iterator.this_arg) * 5;
-                       break;
+                   switch (iterator.this_arg_index) {
+                   /*
+                   * You must take care when dereferencing iterator.this_arg
+                   * for multibyte types... the pointer is not aligned.  Use
+                   * get_unaligned((type *)iterator.this_arg) to dereference
+                   * iterator.this_arg for type "type" safely on all arches.
+                   */
+                   case IEEE80211_RADIOTAP_RATE:
+                           /* radiotap "rate" u8 is in
+                           * 500kbps units, eg, 0x02=1Mbps
+                           */
+                           pkt_rate_100kHz = (*iterator.this_arg) * 5;
+                           break;
 
-               case IEEE80211_RADIOTAP_ANTENNA:
-                       /* radiotap uses 0 for 1st ant */
-                       antenna = *iterator.this_arg);
-                       break;
+                   case IEEE80211_RADIOTAP_ANTENNA:
+                           /* radiotap uses 0 for 1st ant */
+                           antenna = *iterator.this_arg);
+                           break;
 
-               case IEEE80211_RADIOTAP_DBM_TX_POWER:
-                       pwr = *iterator.this_arg;
-                       break;
+                   case IEEE80211_RADIOTAP_DBM_TX_POWER:
+                           pwr = *iterator.this_arg;
+                           break;
 
-               default:
-                       break;
-               }
-       }  /* while more rt headers */
+                   default:
+                           break;
+                   }
+           }  /* while more rt headers */
 
-       if (ret != -ENOENT)
-               return TXRX_DROP;
+           if (ret != -ENOENT)
+                   return TXRX_DROP;
 
-       /* discard the radiotap header part */
-       buf += iterator.max_length;
-       buflen -= iterator.max_length;
+           /* discard the radiotap header part */
+           buf += iterator.max_length;
+           buflen -= iterator.max_length;
 
-       ...
+           ...
 
-}
+    }
 
 Andy Green <andy@warmcat.com>

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 70e48f6..46ac804 100644 (file)
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -5211,7 +5211,7 @@ u32 ieee80211_mandatory_rates(struct ieee80211_supported_band *sband,
  * Radiotap parsing functions -- for controlled injection support
  *
  * Implemented in net/wireless/radiotap.c
- * Documentation in Documentation/networking/radiotap-headers.txt
+ * Documentation in Documentation/networking/radiotap-headers.rst
  */
 
 struct radiotap_align_size {

diff --git a/net/wireless/radiotap.c b/net/wireless/radiotap.c
index 6582d15..d5e2823 100644 (file)
--- a/net/wireless/radiotap.c
+++ b/net/wireless/radiotap.c
@@ -90,7 +90,7 @@ static const struct ieee80211_radiotap_namespace radiotap_ns = {
  * iterator.this_arg for type "type" safely on all arches.
  *
  * Example code:
- * See Documentation/networking/radiotap-headers.txt
+ * See Documentation/networking/radiotap-headers.rst
  */
 
 int ieee80211_radiotap_iterator_init(