抓包工具： wireshark and omnipeek

【常用过滤器】
wireshark捕捉过滤器：
参考：
http://www.tcpdump.org/manpages/pcap-filter.7.html
https://wiki.wireshark.org/CaptureFilters

在捕捉过滤器中，fddi、tr（Token Ring）、wlan是ether的别名。
type mtg subtype [assoc-req, assoc-resp, reassoc-req, reassoc-resp, probe-req, probe-resp, beacon, atim, disassoc, auth and deauth]
type ctl subtype [rts, cts, ack ...]
type data subtype [data, qos-data, ...]
ether proto [ip, ip6, arp, rarp, atalk, aarp, decnet, sca, lat, mopdl, moprc, iso, stp, ipx, or netbeui]
ether proto 0x888e
ether src 11:22:33:44:55:66 and ether dst AA:BB:CC:DD:EE:FF
wlan addr1 11:22:33:44:55:66
wlan addr2 AA:BB:CC:DD:EE:FF
tcp port 23 and not src host 10.0.0.5
expr relop expr  ---     proto [ expr : size ]   ---   proto is one of ether, fddi, tr, wlan, ppp, slip, link, ip, arp, rarp, tcp, udp, icmp, ip6 or radio, and indicates the protocol layer for the index operation. (ether, fddi, wlan, tr, ppp, slip and link all refer to the link layer. radio refers to the "radio header" added to some 802.11 captures.)  --- eg. ip[6:2] & 0x1fff = 0

RX MAC ---------- AA:AA:AA:AA:AA:AA
TX Dev MAC ---- BB:BB:BB:BB:BB:BB
TX P2P MAC ---- CC:CC:CC:CC:CC:CC

所有的包：
(type ctl && (wlan addr1 AA:AA:AA:AA:AA:AA || wlan addr1 BB:BB:BB:BB:BB:BB || wlan addr1 CC:CC:CC:CC:CC:CC)) ||
(type data && (wlan addr1 AA:AA:AA:AA:AA:AA || wlan addr1 CC:CC:CC:CC:CC:CC)) ||
(type mgt && (
    (wlan addr1 AA:AA:AA:AA:AA:AA && (wlan addr2 BB:BB:BB:BB:BB:BB || wlan addr2 CC:CC:CC:CC:CC:CC)) ||
    (wlan addr2 AA:AA:AA:AA:AA:AA && (wlan addr1 BB:BB:BB:BB:BB:BB || wlan addr1 CC:CC:CC:CC:CC:CC)) ||
    (wlan addr1 FF:FF:FF:FF:FF:FF && (wlan addr2 AA:AA:AA:AA:AA:AA || wlan addr2 BB:BB:BB:BB:BB:BB || wlan addr2 CC:CC:CC:CC:CC:CC))
))

关键包：
(ether proto 0x888e && (wlan addr1 AA:AA:AA:AA:AA:AA || wlan addr1 CC:CC:CC:CC:CC:CC)) ||
(type mgt && (
    (wlan addr1 AA:AA:AA:AA:AA:AA && (wlan addr2 BB:BB:BB:BB:BB:BB || wlan addr2 CC:CC:CC:CC:CC:CC)) ||
    (wlan addr2 AA:AA:AA:AA:AA:AA && (wlan addr1 BB:BB:BB:BB:BB:BB || wlan addr1 CC:CC:CC:CC:CC:CC))
))

wireshark显式过滤器：
参考：
https://wiki.wireshark.org/DisplayFilters
https://www.wireshark.org/docs/dfref/  
https://www.wireshark.org/docs/dfref/w/wlan.html

eth.addr == AA:BB:CC:DD:EE:FF
wlan.addr == AA:BB:CC:DD:EE:FF
wlan.fc.type == 0 // management frame
wlan.fc.type == 1 // control frame
wlan.fc.type == 2 // data frame
wlan.fc.subtype == 4
wlan.fc.type_subtype == 0x00  // mgt assoc req
wlan.fc.type_subtype == 0x01  // mgt assoc rsp
wlan.fc.type_subtype == 0x04  // mgt probe req
wlan.fc.type_subtype == 0x05  // mgt probe rsp
wlan.fc.type_subtype == 0x08  // mgt Beacon
wlan.fc.type_subtype == 0x0A   // mgt Disassoc
wlan.fc.type_subtype == 0x0B   // mgt Auth
wlan.fc.type_subtype == 0x0C   // mgt Deauth
wlan.fc.type_subtype == 0x0D   // mgt Action
wlan.fc.type_subtype == 0x0E   // mgt Action No Ack
wlan.ta == AA:BB:CC:DD:EE:FF
wlan.ra == AA:BB:CC:DD:EE:FF
wlan.da == AA:BB:CC:DD:EE:FF
wlan.addr == AA:BB:CC:DD:EE:FF
wlan.addr contains AA:BB:CC
ip.addr == 1.2.3.4
tcp.port in {80 443 8080}
tcp.port == 80 || tcp.port == 443 || tcp.port == 8080

wlan type and subtype:

00 Management 0000 Association request  
00 Management 0001 Association response  
00 Management 0010 Reassociation request  
00 Management 0011 Reassociation response  
00 Management <strong>0100 Probe request</strong>  
00 Management <strong>0101 Probe response</strong>  
00 Management 0110 Timing Advertisement  
00 Management 0111 Reserved  
00 Management <strong>1000 Beacon</strong>  
00 Management 1001 ATIM  
00 Management 1010 Disassociation  
00 Management 1011 Authentication  
00 Management 1100 Deauthentication  
00 Management <strong>1101 Action</strong>  
00 Management 1110 Action No Ack  
00 Management 1111 Reserved  
  
01 Control 0000–0110 Reserved  
01 Control 0111 Control Wrapper  
01 Control 1000 Block Ack Request (BlockAckReq)  
01 Control 1001 Block Ack (BlockAck)  
01 Control 1010 PS-Poll  
01 Control <strong>1011 RTS</strong>  
01 Control <strong>1100 CT</strong>S  
01 Control 1101 ACK  
01 Control 1110 CF-End  
01 Control 1111 CF-End + CF-Ack  
  
10 Data 0000 Data  
10 Data 0001 Data + CF-Ack  
10 Data 0010 Data + CF-Poll  
10 Data 0011 Data + CF-Ack + CF-Poll  
10 Data 0100 Null (no data)  
10 Data 0101 CF-Ack (no data)  
10 Data 0110 CF-Poll (no data)  
10 Data 0111 CF-Ack + CF-Poll (no data)  
10 Data 1000 <strong>QoS Data</strong>  
10 Data 1001 QoS Data + CF-Ack  
10 Data 1010 QoS Data + CF-Poll  
10 Data 1011 QoS Data + CF-Ack + CF-Poll  
10 Data 1100 QoS Null (no data)  
10 Data 1101 Reserved  
10 Data 1110 QoS CF-Poll (no data)  
10 Data 1111 QoS CF-Ack + CF-Poll (no data)  
11 Reserved 0000–1111 Reserved 

omnipeek捕捉过滤器：使用图形界面配置方式
omnipeek显式过滤器：使用图形界面配置方式或者手动输入下面的过滤器
addr(wireless:'0E:8B:FD:*:*:*')
addr(ip:'10.4.3.*')
addr(type: ip, addr1: 10.4.3.1, addr2: 10.5.1.1, dir: 1to2)
protocol(protospec: http)
wireless(media:'802.11b', channelnum: 1, encrypted: 1)
pattern(ascii: 'smb', case: off)
pattern(hex: FF464D50)
port(80)
channel(2)
length(min:128,max: 256)
filter('SMB')


【解密】
可以使用wireshark配合airpcap抓无线数据包，也可以用omnipeek配合相应网卡D-link抓无线数据包。
抓到的包通常是加密的，wireshark可以解密WEP和WPA，omnipeek可以解密WEP、WPA和WPA2。
Wireshark解密方法： Edit -> Protocols -> IEEE 802.11 -> Enable decryption & Edit ....
Wireshark RTP Decode： Analyze -> Decode As ... -> RTP , Telephony -> RTP -> Stream Analysis ...
使用omnipeek解密的前提是要抓到EAPoL-key四次握手包。


ubuntu wifi抓包方法
sudo apt-get install aircrack-ng
sudo airmon-ng start wlan0 11
sudo iwconfig mon0 channel 6
sudo airmon-ng stop mon0
参考：http://www.humbug.in/2012/wireless-sniffer-on-ubuntu-Linux-capture-analyze-network-traffic/