[PATCH] WEP fields are incorrectly shown to be INSIDE snap in the doc
>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:
parent
4a99ac3a9e
commit
44d7a8cfbd
|
@ -56,7 +56,18 @@ Desc. | ctrl | dura | DA/RA | TA | SA | Sequ | Frame | fcs |
|
|||
`--------------------------------------------------| |------'
|
||||
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
|
||||
,---------------------------------------------------.
|
||||
|
@ -65,18 +76,7 @@ Bytes | 1 | 1 | 1 | 3 | 2 | 0-2304 |
|
|||
Desc. | SNAP | SNAP | Control |Eth Tunnel| Type | IP |
|
||||
| DSAP | SSAP | | | | Packet |
|
||||
| 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
|
||||
|
||||
802.3 Ethernet Data Frame
|
||||
|
|
Loading…
Reference in a new issue