lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

[PATCH] WEP fields are incorrectly shown to be INSIDE snap in the doc

Browse Source 
>If encryption is enabled, each fragment payload size is reduced by enough space
>to add the prefix and postfix (IV and ICV totalling 8 bytes in the case of WEP)
>So if you have 1500 bytes of payload with ieee->fts set to 500 without
>encryption it will take 3 frames.  With WEP it will take 4 frames as the
>payload of each frame is reduced to 492 bytes.

Text is correct, but in picture (IV,payload,ICV) sits inside SNAP.
Patch corrects this.

Signed-Off-By: Denis Vlasenko <vda@ilport.com.ua>
Acked-By: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Denis Vlasenko
2006-01-18 12:02:33 +02:00
committed by John W. Linville
parent 4a99ac3a9e
commit 44d7a8cfbd
1 changed files with 13 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
net/ieee80211/ieee80211_tx.c
View File

@@ -56,7 +56,18 @@ Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs |
`--------------------------------------------------| |------' `--------------------------------------------------| |------'
Total: 28 non-data bytes `----.----' Total: 28 non-data bytes `----.----'
| |
.- 'Frame data' expands to <---------------------------' .- 'Frame data' expands, if WEP enabled, to <----------'
|
V
,-----------------------.
Bytes | 4 | 0-2296 | 4 |
|-----|-----------|-----|
Desc. | IV | Encrypted | ICV |
| | Packet | |
`-----| |-----'
`-----.-----'
|
.- 'Encrypted Packet' expands to
| |
V V
,---------------------------------------------------. ,---------------------------------------------------.
@@ -65,18 +76,7 @@ Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 |
Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP | Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP |
| DSAP | SSAP | | | | Packet | | DSAP | SSAP | | | | Packet |
| 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | | | 0xAA | 0xAA |0x03 (UI)|0x00-00-F8| | |
`-----------------------------------------| | `----------------------------------------------------
Total: 8 non-data bytes `----.----'
|
.- 'IP Packet' expands, if WEP enabled, to <--'
|
V
,-----------------------.
Bytes | 4 | 0-2296 | 4 |
|-----|-----------|-----|
Desc. | IV | Encrypted | ICV |
| | IP Packet | |
`-----------------------'
Total: 8 non-data bytes Total: 8 non-data bytes
802.3 Ethernet Data Frame 802.3 Ethernet Data Frame