From cb66d542db83504001d99f50d044c281dc5951d8 Mon Sep 17 00:00:00 2001
From: Nils Schneider <nils@nilsschneider.net>
Date: Sun, 10 Aug 2014 12:49:56 +0200
Subject: [PATCH] mesh-batman-adv-core: add clientcount statistics

This adds

  "client" { "total": <int>, "wifi": <int>" }

to statistics.d. "total" will be the number of clients connected.
"wifi" will be the number of clients connected over wifi. I.e. "total"
will always be equal to or greater than "wifi".

The node will not count itself.
---
 .../lib/gluon/announce/statistics.d/clients   | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 gluon/gluon-mesh-batman-adv-core/files/lib/gluon/announce/statistics.d/clients

diff --git a/gluon/gluon-mesh-batman-adv-core/files/lib/gluon/announce/statistics.d/clients b/gluon/gluon-mesh-batman-adv-core/files/lib/gluon/announce/statistics.d/clients
new file mode 100644
index 0000000..235865e
--- /dev/null
+++ b/gluon/gluon-mesh-batman-adv-core/files/lib/gluon/announce/statistics.d/clients
@@ -0,0 +1,20 @@
+local list = io.lines("/sys/kernel/debug/batman_adv/bat0/transtable_local")
+
+local count = 0
+local wifi = 0
+for line in list do
+  local mac, _, flags, lastseen = line:match("^ %* ([0-9a-f:]+) *(.- )%[(.-)%] +(%d+%.%d+)")
+  if mac then
+    if not flags:match('P') then
+      count = count + 1
+
+      if flags:match('W') then
+        wifi = wifi +1
+      end
+    end
+  end
+end
+
+return { total = count
+       , wifi  = wifi
+       }