[pkg-wpa-devel] Bug#894316: iw dev interface scan ssid <ssid> returns all SSIDs

[Chiraag Nataraj]

Package: iw
Version: 4.14-0.1
Severity: normal

Dear Maintainer,

I have started using systemd-networkd/resolved and wpa_supplicant to configure my wireless card automatically, and it works pretty well. However, given that they don't present much of an interactive interface (wpa_cli doesn't really count ;)), I thought I could use iw to figure out the details of a particular SSID (so I would know how to configure it in wpa_supplicant). Assuming I know the SSID, I expected that `iw dev wlp60s0 scan ssid Chiraag-VPN` would result in just the details for Chiraag-VPN. However, it turns out that iw returns the results for _all_ discovered networks, completely ignoring the `ssid` option. This seems to conflict with the behavior documented in `iw dev wlp60s0 scan help` and thus seems to be a bug. It also seems that this has been reported in Fedora (https://bugzilla.redhat.com/show_bug.cgi?id=1300205) with no resolution. I'd be happy to help get to the bottom of this once and for all. With the introduction of systemd-networkd, it seems that systemd-networkd/resolved + wpa_supplicant + iw could make a great lightweight network management solution, and solving this bug could really help make iw actually useful for many of us.

Sincerely,

Chiraag

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.15.11-chiraag (SMP w/8 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages iw depends on:
ii  libc6             2.27-2
ii  libnl-3-200       3.2.27-2
ii  libnl-genl-3-200  3.2.27-2

Versions of packages iw recommends:
ii  crda  3.18-1

iw suggests no packages.

-- no debconf information