$ uname -a
Linux mycomputer 3.19.0-32-generic #37~14.04.1-Ubuntu SMP Thu Oct 22 09:37:25 UTC 2015 i686 i686 i686 GNU/Linux

$ lspci -knn | grep Net -A2
0b:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)
Subsystem: Dell Wireless 1395 WLAN Mini-Card [1028:000b]
Kernel driver in use: wl

$ dmesg | grep wl
[   11.216767] wl: module license 'MIXED/Proprietary' taints kernel.
[   11.225409] wl: module verification failed: signature and/or  required key missing - tainting kernel
[   11.476882] wlan0: Broadcom BCM4315 802.11 Hybrid Wireless Controller 6.30.223.248 (r487574)