* 7 more packets after each beacon frame
@ 2011-08-16 18:27 Andreas Hartmann
2011-08-16 18:44 ` Ivo Van Doorn
0 siblings, 1 reply; 5+ messages in thread
From: Andreas Hartmann @ 2011-08-16 18:27 UTC (permalink / raw)
To: linux-wireless
[-- Attachment #1: Type: text/plain, Size: 525 bytes --]
Hello!
When examining my own AP (rt2860 based) with another STA in monitor
mode, I can see always 7 packets after each beacon frame:
- Deauthentication [Malformed Packet]
- Unrecognized
- Unrecognized
- Unrecognized
- QoS CF-Ack + CF-Poll [Malformed Packet]
- Unrecognized
- Clear-to-send [Malformed Packet]
These packets don't have any MAC address or IP address.
I attached them as text file.
I can't see these packages after beacon packets from other AP's.
What are they used for?
Thanks for your advice,
Andreas
[-- Attachment #2: 7-packets.txt --]
[-- Type: text/plain, Size: 30228 bytes --]
No. Time Source Destination Protocol Length Info
154 19.455817 802.11 30 Deauthentication[Malformed Packet]
Frame 154: 30 bytes on wire (240 bits), 30 bytes captured (240 bits)
Arrival Time: Aug 16, 2011 20:04:55.124169000 CEST
Epoch Time: 1313517895.124169000 seconds
[Time delta from previous captured frame: 0.000009000 seconds]
[Time delta from previous displayed frame: 0.000009000 seconds]
[Time since reference or first frame: 19.455817000 seconds]
Frame Number: 154
Frame Length: 30 bytes (240 bits)
Capture Length: 30 bytes (240 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: radiotap:wlan]
Radiotap Header v0, Length 26
Header revision: 0
Header pad: 0
Header length: 26
Present flags
.... .... .... .... .... .... .... ...1 = TSFT: True
.... .... .... .... .... .... .... ..1. = Flags: True
.... .... .... .... .... .... .... .1.. = Rate: True
.... .... .... .... .... .... .... 1... = Channel: True
.... .... .... .... .... .... ...0 .... = FHSS: False
.... .... .... .... .... .... ..1. .... = DBM Antenna Signal: True
.... .... .... .... .... .... .0.. .... = DBM Antenna Noise: False
.... .... .... .... .... .... 0... .... = Lock Quality: False
.... .... .... .... .... ...0 .... .... = TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DB TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DBM TX Attenuation: False
.... .... .... .... .... 1... .... .... = Antenna: True
.... .... .... .... ...0 .... .... .... = DB Antenna Signal: False
.... .... .... .... ..0. .... .... .... = DB Antenna Noise: False
.... .... .... .... .1.. .... .... .... = RX flags: True
.... .... .... .0.. .... .... .... .... = Channel+: False
.... .... .... 0... .... .... .... .... = HT information: False
..0. .... .... .... .... .... .... .... = Radiotap NS next: False
.0.. .... .... .... .... .... .... .... = Vendor NS next: False
0... .... .... .... .... .... .... .... = Ext: False
MAC timestamp: 33360005
Flags: 0x50
.... ...0 = CFP: False
.... ..0. = Preamble: Long
.... .0.. = WEP: False
.... 0... = Fragmentation: False
...1 .... = FCS at end: True
..0. .... = Data Pad: False
.1.. .... = Bad FCS: True
0... .... = Short GI: False
Data Rate: 1.0 Mb/s
Channel frequency: 2442 [BG 7]
Channel type: 802.11b (0x00a0)
.... .... ...0 .... = Turbo: False
.... .... ..1. .... = Complementary Code Keying (CCK): True
.... .... .0.. .... = Orthogonal Frequency-Division Multiplexing (OFDM): False
.... .... 1... .... = 2 GHz spectrum: True
.... ...0 .... .... = 5 GHz spectrum: False
.... ..0. .... .... = Passive: False
.... .0.. .... .... = Dynamic CCK-OFDM: False
.... 0... .... .... = Gaussian Frequency Shift Keying (GFSK): False
...0 .... .... .... = GSM (900MHz): False
..0. .... .... .... = Static Turbo: False
.0.. .... .... .... = Half Rate Channel (10MHz Channel Width): False
0... .... .... .... = Quarter Rate Channel (5MHz Channel Width): False
SSI Signal: -68 dBm
Antenna: 1
RX flags: 0x0000
.... .... .... .... .... ..0. = Bad PLCP: False
IEEE 802.11 Deauthentication
Type/Subtype: Deauthentication (0x0c)
Frame Control: 0xB5C3 (Normal)
Version: 3
Type: Management frame (0)
Subtype: 12
Flags: 0xB5
.... ..01 = DS status: Frame from STA to DS via an AP (To DS: 1 From DS: 0) (0x01)
.... .1.. = More Fragments: More fragments follow
.... 0... = Retry: Frame is not being retransmitted
...1 .... = PWR MGT: STA will go to sleep
..1. .... = More Data: Data is buffered for STA at AP
.0.. .... = Protected flag: Data is not protected
1... .... = Order flag: Strictly ordered
Duration: 58414
[Malformed Packet: IEEE 802.11]
[Expert Info (Error/Malformed): Malformed Packet (Exception occurred)]
[Message: Malformed Packet (Exception occurred)]
[Severity level: Error]
[Group: Malformed]
No. Time Source Destination Protocol Length Info
155 19.455820 802.11 30 Unrecognized (Reserved frame), Flags=..mP..FTC
Frame 155: 30 bytes on wire (240 bits), 30 bytes captured (240 bits)
Arrival Time: Aug 16, 2011 20:04:55.124172000 CEST
Epoch Time: 1313517895.124172000 seconds
[Time delta from previous captured frame: 0.000003000 seconds]
[Time delta from previous displayed frame: 0.000003000 seconds]
[Time since reference or first frame: 19.455820000 seconds]
Frame Number: 155
Frame Length: 30 bytes (240 bits)
Capture Length: 30 bytes (240 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: radiotap:wlan]
Radiotap Header v0, Length 26
Header revision: 0
Header pad: 0
Header length: 26
Present flags
.... .... .... .... .... .... .... ...1 = TSFT: True
.... .... .... .... .... .... .... ..1. = Flags: True
.... .... .... .... .... .... .... .1.. = Rate: True
.... .... .... .... .... .... .... 1... = Channel: True
.... .... .... .... .... .... ...0 .... = FHSS: False
.... .... .... .... .... .... ..1. .... = DBM Antenna Signal: True
.... .... .... .... .... .... .0.. .... = DBM Antenna Noise: False
.... .... .... .... .... .... 0... .... = Lock Quality: False
.... .... .... .... .... ...0 .... .... = TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DB TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DBM TX Attenuation: False
.... .... .... .... .... 1... .... .... = Antenna: True
.... .... .... .... ...0 .... .... .... = DB Antenna Signal: False
.... .... .... .... ..0. .... .... .... = DB Antenna Noise: False
.... .... .... .... .1.. .... .... .... = RX flags: True
.... .... .... .0.. .... .... .... .... = Channel+: False
.... .... .... 0... .... .... .... .... = HT information: False
..0. .... .... .... .... .... .... .... = Radiotap NS next: False
.0.. .... .... .... .... .... .... .... = Vendor NS next: False
0... .... .... .... .... .... .... .... = Ext: False
MAC timestamp: 33360246
Flags: 0x50
.... ...0 = CFP: False
.... ..0. = Preamble: Long
.... .0.. = WEP: False
.... 0... = Fragmentation: False
...1 .... = FCS at end: True
..0. .... = Data Pad: False
.1.. .... = Bad FCS: True
0... .... = Short GI: False
Data Rate: 1.0 Mb/s
Channel frequency: 2442 [BG 7]
Channel type: 802.11b (0x00a0)
.... .... ...0 .... = Turbo: False
.... .... ..1. .... = Complementary Code Keying (CCK): True
.... .... .0.. .... = Orthogonal Frequency-Division Multiplexing (OFDM): False
.... .... 1... .... = 2 GHz spectrum: True
.... ...0 .... .... = 5 GHz spectrum: False
.... ..0. .... .... = Passive: False
.... .0.. .... .... = Dynamic CCK-OFDM: False
.... 0... .... .... = Gaussian Frequency Shift Keying (GFSK): False
...0 .... .... .... = GSM (900MHz): False
..0. .... .... .... = Static Turbo: False
.0.. .... .... .... = Half Rate Channel (10MHz Channel Width): False
0... .... .... .... = Quarter Rate Channel (5MHz Channel Width): False
SSI Signal: -68 dBm
Antenna: 1
RX flags: 0x0000
.... .... .... .... .... ..0. = Bad PLCP: False
IEEE 802.11 Unrecognized (Reserved frame), Flags: ..mP..FTC
Type/Subtype: Unknown (0x3d)
Frame Control: 0x33DC (Normal)
Version: 0
Type: Unknown (3)
Subtype: 13
Flags: 0x33
.... ..11 = DS status: Frame part of WDS from one AP to another AP (To DS: 1 From DS: 1) (0x03)
.... .0.. = More Fragments: This is the last fragment
.... 0... = Retry: Frame is not being retransmitted
...1 .... = PWR MGT: STA will go to sleep
..1. .... = More Data: Data is buffered for STA at AP
.0.. .... = Protected flag: Data is not protected
0... .... = Order flag: Not strictly ordered
Duration: 22560
No. Time Source Destination Protocol Length Info
156 19.455822 802.11 30 Unrecognized (Reserved frame), Flags=opm.RM.TC
Frame 156: 30 bytes on wire (240 bits), 30 bytes captured (240 bits)
Arrival Time: Aug 16, 2011 20:04:55.124174000 CEST
Epoch Time: 1313517895.124174000 seconds
[Time delta from previous captured frame: 0.000002000 seconds]
[Time delta from previous displayed frame: 0.000002000 seconds]
[Time since reference or first frame: 19.455822000 seconds]
Frame Number: 156
Frame Length: 30 bytes (240 bits)
Capture Length: 30 bytes (240 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: radiotap:wlan]
Radiotap Header v0, Length 26
Header revision: 0
Header pad: 0
Header length: 26
Present flags
.... .... .... .... .... .... .... ...1 = TSFT: True
.... .... .... .... .... .... .... ..1. = Flags: True
.... .... .... .... .... .... .... .1.. = Rate: True
.... .... .... .... .... .... .... 1... = Channel: True
.... .... .... .... .... .... ...0 .... = FHSS: False
.... .... .... .... .... .... ..1. .... = DBM Antenna Signal: True
.... .... .... .... .... .... .0.. .... = DBM Antenna Noise: False
.... .... .... .... .... .... 0... .... = Lock Quality: False
.... .... .... .... .... ...0 .... .... = TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DB TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DBM TX Attenuation: False
.... .... .... .... .... 1... .... .... = Antenna: True
.... .... .... .... ...0 .... .... .... = DB Antenna Signal: False
.... .... .... .... ..0. .... .... .... = DB Antenna Noise: False
.... .... .... .... .1.. .... .... .... = RX flags: True
.... .... .... .0.. .... .... .... .... = Channel+: False
.... .... .... 0... .... .... .... .... = HT information: False
..0. .... .... .... .... .... .... .... = Radiotap NS next: False
.0.. .... .... .... .... .... .... .... = Vendor NS next: False
0... .... .... .... .... .... .... .... = Ext: False
MAC timestamp: 33360486
Flags: 0x50
.... ...0 = CFP: False
.... ..0. = Preamble: Long
.... .0.. = WEP: False
.... 0... = Fragmentation: False
...1 .... = FCS at end: True
..0. .... = Data Pad: False
.1.. .... = Bad FCS: True
0... .... = Short GI: False
Data Rate: 1.0 Mb/s
Channel frequency: 2442 [BG 7]
Channel type: 802.11b (0x00a0)
.... .... ...0 .... = Turbo: False
.... .... ..1. .... = Complementary Code Keying (CCK): True
.... .... .0.. .... = Orthogonal Frequency-Division Multiplexing (OFDM): False
.... .... 1... .... = 2 GHz spectrum: True
.... ...0 .... .... = 5 GHz spectrum: False
.... ..0. .... .... = Passive: False
.... .0.. .... .... = Dynamic CCK-OFDM: False
.... 0... .... .... = Gaussian Frequency Shift Keying (GFSK): False
...0 .... .... .... = GSM (900MHz): False
..0. .... .... .... = Static Turbo: False
.0.. .... .... .... = Half Rate Channel (10MHz Channel Width): False
0... .... .... .... = Quarter Rate Channel (5MHz Channel Width): False
SSI Signal: -62 dBm
Antenna: 1
RX flags: 0x0000
.... .... .... .... .... ..0. = Bad PLCP: False
IEEE 802.11 Unrecognized (Reserved frame), Flags: opm.RM.TC
Type/Subtype: Unknown (0x39)
Frame Control: 0xED9D (Normal)
Version: 1
Type: Unknown (3)
Subtype: 9
Flags: 0xED
.... ..01 = DS status: Frame from STA to DS via an AP (To DS: 1 From DS: 0) (0x01)
.... .1.. = More Fragments: More fragments follow
.... 1... = Retry: Frame is being retransmitted
...0 .... = PWR MGT: STA will stay up
..1. .... = More Data: Data is buffered for STA at AP
.1.. .... = Protected flag: Data is protected
1... .... = Order flag: Strictly ordered
Duration: 56898
No. Time Source Destination Protocol Length Info
157 19.455825 802.11 30 Unrecognized (Reserved frame), Flags=o....MFTC
Frame 157: 30 bytes on wire (240 bits), 30 bytes captured (240 bits)
Arrival Time: Aug 16, 2011 20:04:55.124177000 CEST
Epoch Time: 1313517895.124177000 seconds
[Time delta from previous captured frame: 0.000003000 seconds]
[Time delta from previous displayed frame: 0.000003000 seconds]
[Time since reference or first frame: 19.455825000 seconds]
Frame Number: 157
Frame Length: 30 bytes (240 bits)
Capture Length: 30 bytes (240 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: radiotap:wlan]
Radiotap Header v0, Length 26
Header revision: 0
Header pad: 0
Header length: 26
Present flags
.... .... .... .... .... .... .... ...1 = TSFT: True
.... .... .... .... .... .... .... ..1. = Flags: True
.... .... .... .... .... .... .... .1.. = Rate: True
.... .... .... .... .... .... .... 1... = Channel: True
.... .... .... .... .... .... ...0 .... = FHSS: False
.... .... .... .... .... .... ..1. .... = DBM Antenna Signal: True
.... .... .... .... .... .... .0.. .... = DBM Antenna Noise: False
.... .... .... .... .... .... 0... .... = Lock Quality: False
.... .... .... .... .... ...0 .... .... = TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DB TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DBM TX Attenuation: False
.... .... .... .... .... 1... .... .... = Antenna: True
.... .... .... .... ...0 .... .... .... = DB Antenna Signal: False
.... .... .... .... ..0. .... .... .... = DB Antenna Noise: False
.... .... .... .... .1.. .... .... .... = RX flags: True
.... .... .... .0.. .... .... .... .... = Channel+: False
.... .... .... 0... .... .... .... .... = HT information: False
..0. .... .... .... .... .... .... .... = Radiotap NS next: False
.0.. .... .... .... .... .... .... .... = Vendor NS next: False
0... .... .... .... .... .... .... .... = Ext: False
MAC timestamp: 33360728
Flags: 0x50
.... ...0 = CFP: False
.... ..0. = Preamble: Long
.... .0.. = WEP: False
.... 0... = Fragmentation: False
...1 .... = FCS at end: True
..0. .... = Data Pad: False
.1.. .... = Bad FCS: True
0... .... = Short GI: False
Data Rate: 1.0 Mb/s
Channel frequency: 2442 [BG 7]
Channel type: 802.11b (0x00a0)
.... .... ...0 .... = Turbo: False
.... .... ..1. .... = Complementary Code Keying (CCK): True
.... .... .0.. .... = Orthogonal Frequency-Division Multiplexing (OFDM): False
.... .... 1... .... = 2 GHz spectrum: True
.... ...0 .... .... = 5 GHz spectrum: False
.... ..0. .... .... = Passive: False
.... .0.. .... .... = Dynamic CCK-OFDM: False
.... 0... .... .... = Gaussian Frequency Shift Keying (GFSK): False
...0 .... .... .... = GSM (900MHz): False
..0. .... .... .... = Static Turbo: False
.0.. .... .... .... = Half Rate Channel (10MHz Channel Width): False
0... .... .... .... = Quarter Rate Channel (5MHz Channel Width): False
SSI Signal: -62 dBm
Antenna: 1
RX flags: 0x0000
.... .... .... .... .... ..0. = Bad PLCP: False
IEEE 802.11 Unrecognized (Reserved frame), Flags: o....MFTC
Type/Subtype: Unknown (0x3d)
Frame Control: 0x87DF (Normal)
Version: 3
Type: Unknown (3)
Subtype: 13
Flags: 0x87
.... ..11 = DS status: Frame part of WDS from one AP to another AP (To DS: 1 From DS: 1) (0x03)
.... .1.. = More Fragments: More fragments follow
.... 0... = Retry: Frame is not being retransmitted
...0 .... = PWR MGT: STA will stay up
..0. .... = More Data: No data buffered
.0.. .... = Protected flag: Data is not protected
1... .... = Order flag: Strictly ordered
Duration: 56875
No. Time Source Destination Protocol Length Info
158 19.455827 802.11 30 QoS CF-Ack + CF-Poll (No data)[Malformed Packet]
Frame 158: 30 bytes on wire (240 bits), 30 bytes captured (240 bits)
Arrival Time: Aug 16, 2011 20:04:55.124179000 CEST
Epoch Time: 1313517895.124179000 seconds
[Time delta from previous captured frame: 0.000002000 seconds]
[Time delta from previous displayed frame: 0.000002000 seconds]
[Time since reference or first frame: 19.455827000 seconds]
Frame Number: 158
Frame Length: 30 bytes (240 bits)
Capture Length: 30 bytes (240 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: radiotap:wlan]
Radiotap Header v0, Length 26
Header revision: 0
Header pad: 0
Header length: 26
Present flags
.... .... .... .... .... .... .... ...1 = TSFT: True
.... .... .... .... .... .... .... ..1. = Flags: True
.... .... .... .... .... .... .... .1.. = Rate: True
.... .... .... .... .... .... .... 1... = Channel: True
.... .... .... .... .... .... ...0 .... = FHSS: False
.... .... .... .... .... .... ..1. .... = DBM Antenna Signal: True
.... .... .... .... .... .... .0.. .... = DBM Antenna Noise: False
.... .... .... .... .... .... 0... .... = Lock Quality: False
.... .... .... .... .... ...0 .... .... = TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DB TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DBM TX Attenuation: False
.... .... .... .... .... 1... .... .... = Antenna: True
.... .... .... .... ...0 .... .... .... = DB Antenna Signal: False
.... .... .... .... ..0. .... .... .... = DB Antenna Noise: False
.... .... .... .... .1.. .... .... .... = RX flags: True
.... .... .... .0.. .... .... .... .... = Channel+: False
.... .... .... 0... .... .... .... .... = HT information: False
..0. .... .... .... .... .... .... .... = Radiotap NS next: False
.0.. .... .... .... .... .... .... .... = Vendor NS next: False
0... .... .... .... .... .... .... .... = Ext: False
MAC timestamp: 33360969
Flags: 0x50
.... ...0 = CFP: False
.... ..0. = Preamble: Long
.... .0.. = WEP: False
.... 0... = Fragmentation: False
...1 .... = FCS at end: True
..0. .... = Data Pad: False
.1.. .... = Bad FCS: True
0... .... = Short GI: False
Data Rate: 1.0 Mb/s
Channel frequency: 2442 [BG 7]
Channel type: 802.11b (0x00a0)
.... .... ...0 .... = Turbo: False
.... .... ..1. .... = Complementary Code Keying (CCK): True
.... .... .0.. .... = Orthogonal Frequency-Division Multiplexing (OFDM): False
.... .... 1... .... = 2 GHz spectrum: True
.... ...0 .... .... = 5 GHz spectrum: False
.... ..0. .... .... = Passive: False
.... .0.. .... .... = Dynamic CCK-OFDM: False
.... 0... .... .... = Gaussian Frequency Shift Keying (GFSK): False
...0 .... .... .... = GSM (900MHz): False
..0. .... .... .... = Static Turbo: False
.0.. .... .... .... = Half Rate Channel (10MHz Channel Width): False
0... .... .... .... = Quarter Rate Channel (5MHz Channel Width): False
SSI Signal: -67 dBm
Antenna: 1
RX flags: 0x0000
.... .... .... .... .... ..0. = Bad PLCP: False
IEEE 802.11 QoS CF-Ack + CF-Poll (No data)
Type/Subtype: QoS CF-Ack + CF-Poll (No data) (0x2f)
Frame Control: 0xF8F9 (Normal)
Version: 1
Type: Data frame (2)
Subtype: 15
Flags: 0xF8
.... ..00 = DS status: Not leaving DS or network is operating in AD-HOC mode (To DS: 0 From DS: 0) (0x00)
.... .0.. = More Fragments: This is the last fragment
.... 1... = Retry: Frame is being retransmitted
...1 .... = PWR MGT: STA will go to sleep
..1. .... = More Data: Data is buffered for STA at AP
.1.. .... = Protected flag: Data is protected
1... .... = Order flag: Strictly ordered
Duration: 52455
[Malformed Packet: IEEE 802.11]
[Expert Info (Error/Malformed): Malformed Packet (Exception occurred)]
[Message: Malformed Packet (Exception occurred)]
[Severity level: Error]
[Group: Malformed]
No. Time Source Destination Protocol Length Info
159 19.455831 802.11 30 Unrecognized (Reserved frame), Flags=opm...FTC
Frame 159: 30 bytes on wire (240 bits), 30 bytes captured (240 bits)
Arrival Time: Aug 16, 2011 20:04:55.124183000 CEST
Epoch Time: 1313517895.124183000 seconds
[Time delta from previous captured frame: 0.000004000 seconds]
[Time delta from previous displayed frame: 0.000004000 seconds]
[Time since reference or first frame: 19.455831000 seconds]
Frame Number: 159
Frame Length: 30 bytes (240 bits)
Capture Length: 30 bytes (240 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: radiotap:wlan]
Radiotap Header v0, Length 26
Header revision: 0
Header pad: 0
Header length: 26
Present flags
.... .... .... .... .... .... .... ...1 = TSFT: True
.... .... .... .... .... .... .... ..1. = Flags: True
.... .... .... .... .... .... .... .1.. = Rate: True
.... .... .... .... .... .... .... 1... = Channel: True
.... .... .... .... .... .... ...0 .... = FHSS: False
.... .... .... .... .... .... ..1. .... = DBM Antenna Signal: True
.... .... .... .... .... .... .0.. .... = DBM Antenna Noise: False
.... .... .... .... .... .... 0... .... = Lock Quality: False
.... .... .... .... .... ...0 .... .... = TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DB TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DBM TX Attenuation: False
.... .... .... .... .... 1... .... .... = Antenna: True
.... .... .... .... ...0 .... .... .... = DB Antenna Signal: False
.... .... .... .... ..0. .... .... .... = DB Antenna Noise: False
.... .... .... .... .1.. .... .... .... = RX flags: True
.... .... .... .0.. .... .... .... .... = Channel+: False
.... .... .... 0... .... .... .... .... = HT information: False
..0. .... .... .... .... .... .... .... = Radiotap NS next: False
.0.. .... .... .... .... .... .... .... = Vendor NS next: False
0... .... .... .... .... .... .... .... = Ext: False
MAC timestamp: 33361210
Flags: 0x50
.... ...0 = CFP: False
.... ..0. = Preamble: Long
.... .0.. = WEP: False
.... 0... = Fragmentation: False
...1 .... = FCS at end: True
..0. .... = Data Pad: False
.1.. .... = Bad FCS: True
0... .... = Short GI: False
Data Rate: 1.0 Mb/s
Channel frequency: 2442 [BG 7]
Channel type: 802.11b (0x00a0)
.... .... ...0 .... = Turbo: False
.... .... ..1. .... = Complementary Code Keying (CCK): True
.... .... .0.. .... = Orthogonal Frequency-Division Multiplexing (OFDM): False
.... .... 1... .... = 2 GHz spectrum: True
.... ...0 .... .... = 5 GHz spectrum: False
.... ..0. .... .... = Passive: False
.... .0.. .... .... = Dynamic CCK-OFDM: False
.... 0... .... .... = Gaussian Frequency Shift Keying (GFSK): False
...0 .... .... .... = GSM (900MHz): False
..0. .... .... .... = Static Turbo: False
.0.. .... .... .... = Half Rate Channel (10MHz Channel Width): False
0... .... .... .... = Quarter Rate Channel (5MHz Channel Width): False
SSI Signal: -68 dBm
Antenna: 1
RX flags: 0x0000
.... .... .... .... .... ..0. = Bad PLCP: False
IEEE 802.11 Unrecognized (Reserved frame), Flags: opm...FTC
Type/Subtype: Unknown (0x38)
Frame Control: 0xE38E (Normal)
Version: 2
Type: Unknown (3)
Subtype: 8
Flags: 0xE3
.... ..11 = DS status: Frame part of WDS from one AP to another AP (To DS: 1 From DS: 1) (0x03)
.... .0.. = More Fragments: This is the last fragment
.... 0... = Retry: Frame is not being retransmitted
...0 .... = PWR MGT: STA will stay up
..1. .... = More Data: Data is buffered for STA at AP
.1.. .... = Protected flag: Data is protected
1... .... = Order flag: Strictly ordered
Duration: 51353
No. Time Source Destination Protocol Length Info
160 19.455833 802.11 30 Clear-to-send[Malformed Packet]
Frame 160: 30 bytes on wire (240 bits), 30 bytes captured (240 bits)
Arrival Time: Aug 16, 2011 20:04:55.124185000 CEST
Epoch Time: 1313517895.124185000 seconds
[Time delta from previous captured frame: 0.000002000 seconds]
[Time delta from previous displayed frame: 0.000002000 seconds]
[Time since reference or first frame: 19.455833000 seconds]
Frame Number: 160
Frame Length: 30 bytes (240 bits)
Capture Length: 30 bytes (240 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: radiotap:wlan]
Radiotap Header v0, Length 26
Header revision: 0
Header pad: 0
Header length: 26
Present flags
.... .... .... .... .... .... .... ...1 = TSFT: True
.... .... .... .... .... .... .... ..1. = Flags: True
.... .... .... .... .... .... .... .1.. = Rate: True
.... .... .... .... .... .... .... 1... = Channel: True
.... .... .... .... .... .... ...0 .... = FHSS: False
.... .... .... .... .... .... ..1. .... = DBM Antenna Signal: True
.... .... .... .... .... .... .0.. .... = DBM Antenna Noise: False
.... .... .... .... .... .... 0... .... = Lock Quality: False
.... .... .... .... .... ...0 .... .... = TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DB TX Attenuation: False
.... .... .... .... .... ..0. .... .... = DBM TX Attenuation: False
.... .... .... .... .... 1... .... .... = Antenna: True
.... .... .... .... ...0 .... .... .... = DB Antenna Signal: False
.... .... .... .... ..0. .... .... .... = DB Antenna Noise: False
.... .... .... .... .1.. .... .... .... = RX flags: True
.... .... .... .0.. .... .... .... .... = Channel+: False
.... .... .... 0... .... .... .... .... = HT information: False
..0. .... .... .... .... .... .... .... = Radiotap NS next: False
.0.. .... .... .... .... .... .... .... = Vendor NS next: False
0... .... .... .... .... .... .... .... = Ext: False
MAC timestamp: 33361451
Flags: 0x50
.... ...0 = CFP: False
.... ..0. = Preamble: Long
.... .0.. = WEP: False
.... 0... = Fragmentation: False
...1 .... = FCS at end: True
..0. .... = Data Pad: False
.1.. .... = Bad FCS: True
0... .... = Short GI: False
Data Rate: 1.0 Mb/s
Channel frequency: 2442 [BG 7]
Channel type: 802.11b (0x00a0)
.... .... ...0 .... = Turbo: False
.... .... ..1. .... = Complementary Code Keying (CCK): True
.... .... .0.. .... = Orthogonal Frequency-Division Multiplexing (OFDM): False
.... .... 1... .... = 2 GHz spectrum: True
.... ...0 .... .... = 5 GHz spectrum: False
.... ..0. .... .... = Passive: False
.... .0.. .... .... = Dynamic CCK-OFDM: False
.... 0... .... .... = Gaussian Frequency Shift Keying (GFSK): False
...0 .... .... .... = GSM (900MHz): False
..0. .... .... .... = Static Turbo: False
.0.. .... .... .... = Half Rate Channel (10MHz Channel Width): False
0... .... .... .... = Quarter Rate Channel (5MHz Channel Width): False
SSI Signal: -62 dBm
Antenna: 1
RX flags: 0x0000
.... .... .... .... .... ..0. = Bad PLCP: False
IEEE 802.11 Clear-to-send
Type/Subtype: Clear-to-send (0x1c)
Frame Control: 0x27C4 (Normal)
Version: 0
Type: Control frame (1)
Subtype: 12
Flags: 0x27
.... ..11 = DS status: Frame part of WDS from one AP to another AP (To DS: 1 From DS: 1) (0x03)
.... .1.. = More Fragments: More fragments follow
.... 0... = Retry: Frame is not being retransmitted
...0 .... = PWR MGT: STA will stay up
..1. .... = More Data: Data is buffered for STA at AP
.0.. .... = Protected flag: Data is not protected
0... .... = Order flag: Not strictly ordered
Duration: 64053
[Malformed Packet: IEEE 802.11]
[Expert Info (Error/Malformed): Malformed Packet (Exception occurred)]
[Message: Malformed Packet (Exception occurred)]
[Severity level: Error]
[Group: Malformed]
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: 7 more packets after each beacon frame
2011-08-16 18:27 7 more packets after each beacon frame Andreas Hartmann
@ 2011-08-16 18:44 ` Ivo Van Doorn
2011-08-16 20:03 ` Andreas Hartmann
0 siblings, 1 reply; 5+ messages in thread
From: Ivo Van Doorn @ 2011-08-16 18:44 UTC (permalink / raw)
To: Andreas Hartmann; +Cc: linux-wireless
Hi,
> When examining my own AP (rt2860 based) with another STA in monitor
> mode, I can see always 7 packets after each beacon frame:
Well if it is an AP with a rt2860 chipset, then it probably isn't
using the rt2x00 drivers,
so no idea what those extra frames would be.
Can't they come from another client somewhere which is responding to the AP?
Ivo
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: 7 more packets after each beacon frame
2011-08-16 18:44 ` Ivo Van Doorn
@ 2011-08-16 20:03 ` Andreas Hartmann
2011-08-16 22:08 ` Helmut Schaa
0 siblings, 1 reply; 5+ messages in thread
From: Andreas Hartmann @ 2011-08-16 20:03 UTC (permalink / raw)
To: Ivo Van Doorn; +Cc: linux-wireless@vger.kernel.org
Ivo Van Doorn schrieb:
> Hi,
>
>> When examining my own AP (rt2860 based) with another STA in monitor
>> mode, I can see always 7 packets after each beacon frame:
>
> Well if it is an AP with a rt2860 chipset, then it probably isn't
> using the rt2x00 drivers,
I'm using rt2800pci driver (from compat-wireless-2011-08-08).
Aug 16 20:33:24 pc kernel: [52436.719073] cfg80211: Calling CRDA to
update world regulatory domain
Aug 16 20:33:24 pc kernel: [52436.740378] cfg80211: World regulatory
domain updated:
Aug 16 20:33:24 pc kernel: [52436.740383] cfg80211: (start_freq -
end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Aug 16 20:33:24 pc kernel: [52436.740386] cfg80211: (2402000 KHz -
2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Aug 16 20:33:24 pc kernel: [52436.740389] cfg80211: (2457000 KHz -
2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Aug 16 20:33:24 pc kernel: [52436.740391] cfg80211: (2474000 KHz -
2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Aug 16 20:33:24 pc kernel: [52436.740393] cfg80211: (5170000 KHz -
5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Aug 16 20:33:24 pc kernel: [52436.740396] cfg80211: (5735000 KHz -
5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Aug 16 20:33:24 pc kernel: [52436.750023] cfg80211: Calling CRDA for
country: DE
Aug 16 20:33:24 pc kernel: [52436.756976] cfg80211: Regulatory domain
changed to country: DE
Aug 16 20:33:24 pc kernel: [52436.756981] cfg80211: (start_freq -
end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Aug 16 20:33:24 pc kernel: [52436.756983] cfg80211: (2400000 KHz -
2483500 KHz @ 40000 KHz), (N/A, 2000 mBm)
Aug 16 20:33:24 pc kernel: [52436.756986] cfg80211: (5150000 KHz -
5350000 KHz @ 40000 KHz), (N/A, 2000 mBm)
Aug 16 20:33:24 pc kernel: [52436.756988] cfg80211: (5470000 KHz -
5725000 KHz @ 40000 KHz), (N/A, 2698 mBm)
Aug 16 20:33:24 pc kernel: [52436.825208] rt2800pci 0000:03:07.0: PCI
INT A -> GSI 21 (level, low) -> IRQ 21
Aug 16 20:33:24 pc kernel: [52436.835011] phy0 -> rt2x00_set_chip: Info
- Chipset detected - rt: 2860, rf: 0002, rev: 0103.
Aug 16 20:33:24 pc kernel: [52436.844383] ieee80211 phy0: Selected rate
control algorithm 'minstrel_ht'
Aug 16 20:33:24 pc kernel: [52436.845258] Registered led device:
rt2800pci-phy0::radio
Aug 16 20:33:24 pc kernel: [52436.845276] Registered led device:
rt2800pci-phy0::assoc
Aug 16 20:33:24 pc kernel: [52436.845293] Registered led device:
rt2800pci-phy0::quality
Aug 16 20:33:24 pc kernel: [52436.863893] udev: renamed network
interface wlan0 to wlan1
Aug 16 20:33:24 pc ifup: wlan1 device: RaLink RT2800 802.11n PCI
Aug 16 20:33:24 pc ifup: No configuration found for wlan1
Aug 16 20:33:26 pc kernel: [52438.868947] phy0 ->
rt2x00lib_request_firmware: Info - Loading firmware file 'rt2860.bin'.
Aug 16 20:33:26 pc kernel: [52438.873544] phy0 ->
rt2x00lib_request_firmware: Info - Firmware detected - version: 0.34.
Aug 16 20:33:26 pc kernel: [52438.900652] phy0 -> rt2800pci_mcu_status:
Error - MCU request failed, no response from hardware
Aug 16 20:33:26 pc kernel: [52438.907351] phy0 -> rt2x00mac_conf_tx:
Info - Configured TX queue 0 - CWmin: 3, CWmax: 4, Aifs: 2, TXop: 102.
Aug 16 20:33:26 pc kernel: [52438.907373] phy0 -> rt2x00mac_conf_tx:
Info - Configured TX queue 1 - CWmin: 4, CWmax: 5, Aifs: 2, TXop: 188.
Aug 16 20:33:26 pc kernel: [52438.907390] phy0 -> rt2x00mac_conf_tx:
Info - Configured TX queue 2 - CWmin: 5, CWmax: 10, Aifs: 3, TXop: 0.
Aug 16 20:33:26 pc kernel: [52438.907407] phy0 -> rt2x00mac_conf_tx:
Info - Configured TX queue 3 - CWmin: 5, CWmax: 10, Aifs: 7, TXop: 0.
> so no idea what those extra frames would be.
They are coming up exactly with the starting of hostapd.
> Can't they come from another client somewhere which is responding to the AP?
None of my clients have been running as supplicant during the
measurement. There can't be seen any MAC or IP addresses in this
package. But they're sent on exactly this channel the AP (hostapd) is
configured on.
Andreas
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: 7 more packets after each beacon frame
2011-08-16 20:03 ` Andreas Hartmann
@ 2011-08-16 22:08 ` Helmut Schaa
2011-08-17 6:20 ` Andreas Hartmann
0 siblings, 1 reply; 5+ messages in thread
From: Helmut Schaa @ 2011-08-16 22:08 UTC (permalink / raw)
To: Andreas Hartmann; +Cc: Ivo Van Doorn, linux-wireless@vger.kernel.org
On Tue, Aug 16, 2011 at 10:03 PM, Andreas Hartmann
<andihartmann@01019freenet.de> wrote:
>> When examining my own AP (rt2860 based) with another STA in monitor
>> mode, I can see always 7 packets after each beacon frame:
That looks quite odd. Maybe some garbage ended up in the beacon slots
after the first beacon.
Do you use multiple virtual interfaces?
Helmut
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: 7 more packets after each beacon frame
2011-08-16 22:08 ` Helmut Schaa
@ 2011-08-17 6:20 ` Andreas Hartmann
0 siblings, 0 replies; 5+ messages in thread
From: Andreas Hartmann @ 2011-08-17 6:20 UTC (permalink / raw)
To: Helmut Schaa; +Cc: Ivo Van Doorn, linux-wireless@vger.kernel.org
Helmut Schaa schrieb:
> On Tue, Aug 16, 2011 at 10:03 PM, Andreas Hartmann
> <andihartmann@01019freenet.de> wrote:
>>> When examining my own AP (rt2860 based) with another STA in monitor
>>> mode, I can see always 7 packets after each beacon frame:
>
> That looks quite odd. Maybe some garbage ended up in the beacon slots
> after the first beacon.
> Do you use multiple virtual interfaces?
I removed _all_ of my network devices (but lo) and tested again (on a
now clean machine :-)). The complete module stack for rt2800pci was
unloaded and loaded again. I could see the same odd packages again.
Andreas
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2011-08-17 6:20 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
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2011-08-16 18:27 7 more packets after each beacon frame Andreas Hartmann
2011-08-16 18:44 ` Ivo Van Doorn
2011-08-16 20:03 ` Andreas Hartmann
2011-08-16 22:08 ` Helmut Schaa
2011-08-17 6:20 ` Andreas Hartmann
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