Linux下查看连接WiFi的BSSID
可以通过iw命令查看当前无线网卡连接状态，获取连接wifi的MAC地址BSSID，也可以扫描附近的无线网络，获取附近的无线网络信息。
如果没有iw命令，可以通过以下命令安装
# Ubuntu下安装iw
sudo apt install iw操作示例:
iw dev wlxc83a35xxxxx link 查看当前无线网卡连接状态
iw dev wlxc83a35xxxxx scan 扫描附近的无线网络
1.获取无线网卡名称
通过ip addr查看wifi网卡名称
3: wlxc83a3550000: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether c8:3a:35:58:49:9c brd ff:ff:ff:ff:ff:ff
inet 192.168.55.1/21 brd 192.168.55.255 scope global wlxc83a3550000
valid_lft forever preferred_lft forever
inet6 fe80::ca3a:35ff:fe58:499c/64 scope link
valid_lft forever preferred_lft forever这里的网卡名称是 wlxc83a35xxxxx
2.查看当前无线网卡连接状态
查看当前连接的WiFi的BSSID，也就是mac地址
# 查看当前无线网卡连接状态
iw dev wlxc83a35xxxxx link输出
Connected to b0:44:14:xx:xx:xx (on wlxc83a35xxxxx) # 当前连接的无线MAC地址 b0:44:14:xx:xx:xx
SSID: test # SSID 连接的无线网络名称 test
freq: 5260 # 频率 5260 MHz，无线连接使用的 射频频道
RX: 3493948 bytes (17276 packets) # 接收数据包
TX: 7693505 bytes (18522 packets) # 发送数据包
signal: -52 dBm # 信号强度
rx bitrate: 292.5 MBit/s VHT-MCS 7 80MHz VHT-NSS 1 # 接收速率
tx bitrate: 263.3 MBit/s VHT-MCS 6 80MHz VHT-NSS 1 # 发送速率3.扫描附近的无线网络
iw dev wlxc83a3550000 scan输出示例：
BSS 68:dd:b7:xx:xx:xx(on wlxc83a35xxxxx)
TSF: 1745890211343116 usec (20207d, 01:30:11)
freq: 2437
beacon interval: 100 TUs
capability: ESS Privacy ShortSlotTime RadioMeasure (0x1411)
signal: -72.00 dBm
last seen: 2396 ms ago
Information elements from Probe Response frame:
SSID: test
Supported rates: 1.0* 2.0* 5.5* 11.0* 6.0 9.0 12.0 18.0
Extended supported rates: 24.0 36.0 48.0 54.0
DS Parameter set: channel 6
Country: CN Environment: bogus
Channels [1 - 13] @ 30 dBm
ERP: <no flags>
HT capabilities:
Capabilities: 0x106e
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 3839 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 2 usec (0x04)
HT RX MCS rate indexes supported: 0-15
HT TX MCS rate indexes are undefined
HT operation:
* primary channel: 6
* secondary channel offset: below
* STA channel width: any
* RIFS: 0
* HT protection: no
* non-GF present: 0
* OBSS non-GF present: 0
* dual beacon: 0
* dual CTS protection: 0
* STBC beacon: 0
* L-SIG TXOP Prot: 0
* PCO active: 0
* PCO phase: 0
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
WPA: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
WMM: * Parameter version 1
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
Extended capabilities:
* BSS Transition
BSS 68:dd:b7:xx:xx:xx(on wlxc83a35xxxxx)
TSF: 1745890213380663 usec (20207d, 01:30:13)
freq: 5745
beacon interval: 100 TUs
capability: ESS Privacy SpectrumMgmt RadioMeasure (0x1111)
signal: -83.00 dBm
last seen: 360 ms ago
Information elements from Probe Response frame:
SSID: test
Supported rates: 6.0* 9.0 12.0* 18.0 24.0* 36.0 48.0 54.0
DS Parameter set: channel 149
Country: CN Environment: Indoor/Outdoor
Channels [36 - 64] @ 23 dBm
Channels [149 - 165] @ 30 dBm
Power constraint: 3 dB
RSN: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
* Capabilities: 16-PTKSA-RC 1-GTKSA-RC (0x000c)
HT capabilities:
Capabilities: 0x86e
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
No RX STBC
Max AMSDU length: 7935 bytes
No DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: No restriction (0x00)
HT RX MCS rate indexes supported: 0-15
HT TX MCS rate indexes are undefined
HT operation:
* primary channel: 149
* secondary channel offset: above
* STA channel width: any
* RIFS: 0
* HT protection: no
* non-GF present: 1
* OBSS non-GF present: 0
* dual beacon: 0
* dual CTS protection: 0
* STBC beacon: 0
* L-SIG TXOP Prot: 0
* PCO active: 0
* PCO phase: 0
WPA: * Version: 1
* Group cipher: CCMP
* Pairwise ciphers: CCMP
* Authentication suites: PSK
WMM: * Parameter version 1
* BE: CW 15-1023, AIFSN 3
* BK: CW 15-1023, AIFSN 7
* VI: CW 7-15, AIFSN 2, TXOP 3008 usec
* VO: CW 3-7, AIFSN 2, TXOP 1504 usec
VHT capabilities:
VHT Capabilities (0x03d979b1):
Max MPDU length: 7991
Supported Channel Width: neither 160 nor 80+80
RX LDPC
short GI (80 MHz)
TX STBC
SU Beamformer
SU Beamformee
MU Beamformer
MU Beamformee
+HTC-VHT
VHT RX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT RX highest supported: 867 Mbps
VHT TX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT TX highest supported: 867 Mbps
VHT operation:
* channel width: 1 (80 MHz)
* center freq segment 1: 155
* center freq segment 2: 0
* VHT basic MCS set: 0xfffa
Extended capabilities:
* Extended Channel Switching
* BSS Transition
* SSID List
* Operating Mode Notification
* Max Number Of MSDUs In A-MSDU is unlimited