When I use arp-scan on OpenWrt 19.07.0-rc1, I get "0 responded":
# arp-scan -I br-lan -l
Interface: br-lan, datalink type: EN10MB (Ethernet)
WARNING: Cannot open MAC/Vendor file /usr/share/arp-scan/ieee-oui.txt: No such file or directory
WARNING: Cannot open MAC/Vendor file /usr/share/arp-scan/ieee-iab.txt: No such file or directory
WARNING: Cannot open MAC/Vendor file /usr/share/arp-scan/mac-vendor.txt: No such file or directory
Starting arp-scan 1.9.5 with 256 hosts (https://github.com/royhills/arp-scan)
15 packets received by filter, 0 packets dropped by kernel
Ending arp-scan 1.9.5: 256 hosts scanned in 1.852 seconds (138.23 hosts/sec). 0 responded
This appears to be the same bug as:
Updating OpenWrt's version of arp-scan from 1.9.5 to 1.9.7 would probably fix the problem.
Pinging package maintainer @urusha
The updated package does indeed fix the problem, thank you!
@alexhenrie @urusha Probably a dumb question, but how do I get the v1.9.7 package on OpenWRT 18.06? As near as I can tell 18.086 is still stuck on version 1.9-40-g69b2f70-1; when I install it directly, the app says it's version 1.9.2.
Edit: It looks like 1.9.7 is available here in the snapshots packages: https://downloads.openwrt.org/snapshots/packages/mipsel_24kc/packages/arp-scan_1.9.7-1_mipsel_24kc.ipk
Any idea if that will get released in a new branch version of OpenWRT? (For example, we're on 18.06.8 and 19.07.2 right now. Would it come out in 18.06.9 or 19.07.3? Or will it only come in the next major release?)
Thanks!