Radio tap present flags
0 /TSFT
1 /Flags
2 /Rate
3 /Channel
4 /FHSS
11 /Antenna
14 /RX flags
19 /MCS
21 /VHT
Radiotab flags
Mask | Meaning |
0x01 | sent/received during CFP |
0x02 | sent/received with short preamble |
0x04 | sent/received with WEP encryption |
0x08 | sent/received with fragmentation |
0x10 | frame includes FCS |
0x20 | frame has padding between 802.11 header and payload (to 32-bit boundary) |
0x40 | frame failed FCS check |
Currently unspecified but used:
Mask | Meaning |
0x80 | frame used short guard interval (HT) |
beacon 프레임 사이에 PCF는 두가지 구간을 정한다. 하나는 비경쟁구간 Contention Free Period (CFP)이고 다른 하나는 경쟁 구간 Contention Period (CP)이다. 경쟁구간에서는 DCF가 사용된다. 비경쟁구간에서 AP는 Contention-Free-Poll (CF-Poll) 패킷을 각 station에 차례차례 전송하게 된다. CF-Poll을 받은 station은 패킷을 전송할 권할을 갖는다. 즉 AP가 경쟁에 관한 중재자가 된다. 비록 이 방법이 QoS를 관리하는데 더 좋긴하지만 PCF는 802.1p나 DiffServ 같은 다른 QoS 시스템에서 일반적으로 사용하는 트래픽별 전송 우선 순위를 사용하지는 않는다.
OFDM방식의 PLCP 프레임
MAC 부계층 프레임
관리 프레임
기능 종류 별 필드구성
제어프레임
RTS
Ack 제어프레임
Table 8-54 Element IDs | ||||
Element | Element ID | element (in octets) | Extensible | |
SSID (see 8.4.2.2) | 0 | 2 to 34 | ||
Supported rates (see 8.4.2.3) | 1 | 3 to 10 | ||
FH Parameter Set (see 8.4.2.4) | 2 | 7 | ||
DSSS Parameter Set (see 8.4.2.5) | 3 | 3 | ||
CF Parameter Set (see 8.4.2.6) | 4 | 8 | ||
TIM (see 8.4.2.7) | 5 | 6 to 256 | ||
IBSS Parameter Set (see 8.4.2.8) | 6 | 4 | ||
Country (see 8.4.2.10) | 7 | 8 to 256 | ||
Hopping Pattern Parameters (see 8.4.2.11) | 8 | 4 | ||
Hopping Pattern Table (see 8.4.2.12) | 9 | 6 to 256 | ||
Request (see 8.4.2.13) | 10 | 2 to 256 | ||
BSS Load (see 8.4.2.30) | 11 | 7 | ||
EDCA Parameter Set (see 8.4.2.31) | 12 | 20 | ||
TSPEC (see 8.4.2.32) | 13 | 57 | ||
TCLAS (see 8.4.2.33) | 14 | 2 to 257 | ||
Schedule (see 8.4.2.36) | 15 | 16 | ||
Challenge text (see 8.4.2.9) | 16 | 3 to 255 | ||
Reserved | 17–31 | |||
Power Constraint (see 8.4.2.16) | 32 | 3 | ||
Power Capability (see 8.4.2.17) | 33 | 4 | ||
TPC Request (see 8.4.2.18) | 34 | 2 | ||
TPC Report (see 8.4.2.19) | 35 | 4 | ||
Supported Channels (see 8.4.2.20) | 36 | 4 to 256 | ||
Channel Switch Announcement (see 8.4.2.21) | 37 | 5 | ||
Measurement Request (see 8.4.2.23) | 38 | 5 to 257 | Subelements, for formats using 8.4.2.23.4 to 8.4.2.23.12. | |
Measurement Report(see 8.4.2.24) | 39 | 5 to 257 | Subelements, for formats using 8.4.2.24.4 to 8.4.2.24.11. | |
Quiet (see 8.4.2.25) | 40 | 8 | ||
IBSS DFS (see 8.4.2.26) | 41 | 10 to 255 | ||
ERP (see 8.4.2.14) | 42 | 3 | ||
TS Delay (see 8.4.2.34) | 43 | 6 | ||
TCLAS Processing (see 8.4.2.35) | 44 | 3 | ||
HT Capabilities (see 8.4.2.58) | 45 | 28 | Yes | |
QoS Capability (see 8.4.2.37) | 46 | 3 | ||
Reserved | 47 | |||
RSN (see 8.4.2.27) | 48 | 36 to 256 | ||
Reserved | 49 | |||
Extended Supported Rates (see 8.4.2.15) | 50 | 3 to 257 | ||
AP Channel Report (see 8.4.2.38) | 51 | 3 to 257 | ||
Neighbor Report (see 8.4.2.39) | 52 | 15 to 257 | Subelements | |
RCPI (see 8.4.2.40) | 53 | 3 | Yes | |
Mobility Domain (MDE) (see 8.4.2.49) | 54 | 5 | ||
Fast BSS Transition (FTE) (see 8.4.2.50) | 55 | 84 to 257 | ||
Timeout Interval (see 8.4.2.51) | 56 | 7 | ||
RIC Data (RDE) (see 8.4.2.52) | 57 | 6 | ||
DSE Registered Location (see 8.4.2.54) | 58 | 22 | ||
Supported Operating Classes (see 8.4.2.56) | 59 | 4 to 255 | ||
Extended Channel Switch Announcement | 60 | 6 | ||
(see 8.4.2.55) | ||||
HT Operation (see 8.4.2.59) | 61 | 24 | Yes | |
Secondary Channel Offset (see 8.4.2.22) | 62 | 3 | ||
BSS Average Access Delay (see 8.4.2.41) | 63 | 3 | Yes | |
Antenna (see 8.4.2.42) | 64 | 3 | Yes | |
RSNI (see 8.4.2.43) | 65 | 3 | Yes | |
Measurement Pilot Transmission (see 8.4.2.44) | 66 | 3 to 257 | Subelements | |
BSS Available Admission Capacity | 67 | 4 to 28 | Yes | |
(see 8.4.2.45) | ||||
BSS AC Access Delay (see 8.4.2.46) | 68 | 6 | Yes | |
Time Advertisement (see 8.4.2.63) | 69 | 3 to 18 | Yes | |
RM Enabled Capabilities (see 8.4.2.47) | 70 | 7 | Yes | |
Multiple BSSID (see 8.4.2.48) | 71 | 3 to 257 | Subelements | |
20/40 BSS Coexistence (see 8.4.2.62) | 72 | 3 | Yes | |
20/40 BSS Intolerant Channel Report (see 8.4.2.60) | 73 | 3 to 257 | ||
Overlapping BSS Scan Parameters (see 8.4.2.61) | 74 | 16 | ||
RIC Descriptor (see 8.4.2.53) | 75 | 3 to 257 | ||
Management MIC (see 8.4.2.57) | 76 | 18 | ||
Event Request (see 8.4.2.69) | 78 | 5 to 257 | Subelements | |
Event Report (see 8.4.2.70) | 79 | 5 to 257 | ||
Diagnostic Request (see 8.4.2.71) | 80 | 6 to 257 | Subelements | |
Diagnostic Report (see 8.4.2.72) | 81 | 5 to 257 | Subelements | |
Location Parameters (see 8.4.2.73) | 82 | 2 to 257 | Subelements | |
Nontransmitted BSSID Capability (see 8.4.2.74) | 83 | 4 | ||
SSID List (see 8.4.2.75) | 84 | 2 to 257 | ||
Multiple BSSID-Index (see 8.4.2.76) | 85 | 3 to 5 | ||
FMS Descriptor (see 8.4.2.77) | 86 | 3 to 257 | ||
FMS Request (see 8.4.2.78) | 87 | 3 to 257 | Subelements | |
FMS Response (see 8.4.2.79) | 88 | 18 to 257 | Subelements | |
QoS Traffic Capability (see 8.4.2.80) | 89 | 3 to 5 | Yes | |
BSS Max Idle Period (see 8.4.2.81) | 90 | 5 | Yes | |
TFS Request (see 8.4.2.82) | 91 | 6 to 257 | Subelements | |
TFS Response (see 8.4.2.83) | 92 | 6 to 256 | Subelements | |
WNM-Sleep Mode (see 8.4.2.84) | 93 | 6 | Yes | |
TIM Broadcast Request (see 8.4.2.85) | 94 | 3 | Yes | |
TIM Broadcast Response (see 8.4.2.86) | 95 | 3 or 12 | Yes | |
Collocated Interference Report (see 8.4.2.87) | 96 | 23 | Yes | |
Channel Usage (see 8.4.2.88) | 97 | 3 to 257 | Subelements | |
Time Zone (see 8.4.2.89) | 98 | 3 to 257 | Yes | |
DMS Request (see 8.4.2.90) | 99 | 3 to 257 | Subelements | |
DMS Response (see 8.4.2.91) | 100 | 3 to 257 | Subelements | |
Link Identifier (see 8.4.2.64) | 101 | 20 | Yes | |
Wakeup Schedule (see 8.4.2.65) | 102 | 20 | Yes | |
Channel Switch Timing (see 8.4.2.66) | 104 | 6 | Yes | |
PTI Control (see 8.4.2.67) | 105 | 5 | Yes | |
TPU Buffer Status (see 8.4.2.68) | 106 | 3 | Yes | |
Interworking (see 8.4.2.94) | 107 | 3, 5, 9, 11 | ||
Advertisement Protocol (see 8.4.2.95) | 108 | variable | ||
Expedited Bandwidth Request (see 8.4.2.96) | 109 | 3 | ||
QoS Map Set (see 8.4.2.97) | 110 | 18 to 60 | Yes | |
Roaming Consortium (see 8.4.2.98) | 111 | variable | Yes | |
Emergency Alert Identifier (see 8.4.2.99) | 112 | 10 | ||
Mesh Configuration (see 8.4.2.100 | 113 | 9 | Yes | |
Mesh ID (see 8.4.2.101 | 114 | 2 to 34 | ||
Mesh Link Metric Report (see 8.4.2.102) | 115 | 3 to 257 | ||
Congestion Notification (see 8.4.2.103) | 116 | 16 | Yes | |
Mesh Peering Management (see 8.4.2.104) | 117 | 5, 7, 9, 21, 23, or 25 | Yes | |
Mesh Channel Switch Parameters (see 8.4.2.105) | 118 | 8 | Yes | |
Mesh Awake Window (see 8.4.2.106) | 119 | 4 | Yes | |
Beacon Timing (see 8.4.2.107) | 120 | 3 to 255 | ||
MCCAOP Setup Request (see 8.4.2.108) | 121 | 8 | Yes | |
MCCAOP Setup Reply (see 8.4.2.109) | 122 | 4 or 9 | ||
MCCAOP Advertisement (see 8.4.2.111) | 123 | 4 to 257 | Yes | |
MCCAOP Teardown (see 8.4.2.112) | 124 | 3 or 9 | Yes | |
GANN (see 8.4.2.113) | 125 | 17 | Yes | |
RANN (see 8.4.2.114) | 126 | 23 | Yes | |
Extended Capabilities (see 8.4.2.29) | 127 | 3 to 8 | Yes | |
Reserved | 128–129 | |||
PREQ (see 8.4.2.115) | 130 | 39 to 254 | Yes | |
PREP (see 8.4.2.116) | 131 | 33 or 39 | Yes | |
PERR (see 8.4.2.117) | 132 | 17 to 251 | Yes | |
Reserved | 133–136 | |||
PXU (see 8.4.2.118) | 137 | 21 to 257 | Yes | |
PXUC (see 8.4.2.119) | 138 | 9 | Yes | |
Authenticated Mesh Peering Exchange | 139 | 86 to 257 | ||
(see 8.4.2.120) | ||||
MIC (see 8.4.2.121) | 140 | 18 | ||
Destination URI (see 8.4.2.92) | 141 | 3 to 257 | Yes | |
U-APSD Coexistence (see 8.4.2.93) | 142 | 14 to 257 | Subelements | |
Reserved | 143–173 | |||
MCCAOP Advertisement Overview (see 8.4.2.110) | 174 | 8 | Yes | |
Reserved | 175–220 | |||
Vendor Specific (see 8.4.2.28) | 221 | 3 to 257 | ||
222–255 | ||||
Table 8-54 Element IDs | ||||
'취미' 카테고리의 다른 글
| AWS DynamoDB, Lambda를 이용한 auto scaling #2 (2) | 2017.02.20 |
|---|---|
| JWT(JSON Web Token) (0) | 2017.02.20 |
| AWS DynamoDB, Lambda를 이용한 auto scaling #1 (0) | 2017.02.19 |
| 아이폰 MAC address 랜덤화 (3) | 2016.04.09 |
| 파이썬 scapy로 AP 만들기 - WEP 구현 (0) | 2016.02.15 |
