WIP: Add network information

Readme.md

@@ -0,0 +1,4 @@
+# info-beamer testcard
+Screen test card with additional information for https://info-beamer.com.
+
+This is a modified version of https://git.franzi.business/kunsi/infobeamer-testcard, which adds network connectivity information (taken from the [Screen Installation Instructions](https://github.com/info-beamer/package-installation-help) package).

node.json

@@ -1,7 +1,9 @@
 {
-    "name": "c3voc testcard",
+    "name": "Screen Testcard",
     "options": [],
     "permissions": {
-        "network": "Needs to fetch device info from info-beamer api"
+        "network": "Needs to fetch device info from info-beamer api",
+        "unboxed": "Needs access to the device configuration",
+        "run-as-root": "Needs access to /sd/config"
     }
-}
+}

node.lua

@@ -1,3 +1,4 @@
+node.alias "testcard"
 util.init_hosted()
 
 local json = require "json"
@@ -19,6 +20,19 @@ gl.setup(NATIVE_WIDTH, NATIVE_HEIGHT)
 card = resource.load_image("testcard.png")
 font = resource.load_font("vera.ttf")
 
+local v = {
+    network = "<unkown>",
+    ethip = "<unkown>",
+    wlanip = "<unkown>",
+    gw = "<unkown>"
+}
+
+util.data_mapper{
+    ["update/(.*)"] = function(key, val)
+        v[key] = val
+    end
+}
+
 function node.render()
     gl.clear(0,0,0,1)
 
@@ -27,7 +41,7 @@ function node.render()
     -- upper: 623
     -- lower: 707
 
-    upper_text = "C3VOC: " .. description
+    upper_text = "CCC: " .. description
 
     if location == nil or location == '' then
         lower_text = "Serial " .. serial
@@ -40,4 +54,35 @@ function node.render()
 
     lower_width = font:width(lower_text, 20)
     font:write(960-(lower_width/2), 679, lower_text, 20, 1,1,1,1)
+
+    -- draw text on left and right dark grey area
+    local fontsize = 30
+    local offset = fontsize+10
+    local x_left = 90
+    local x_right = 1450
+    local y_start = 500
+
+    -- left side: network config, online status
+    local y = y_start
+    font:write(x_left, y, "Mode: " .. v.network, fontsize, 1,1,1,1)
+
+    y = y + offset
+    font:write(x_left, y, "GW: " .. v.gw, fontsize, 1,1,1,1)
+
+    y = y + offset
+    if v.online then
+        local col = {1,0,0,1}
+        if v.online == "online" then
+            col = {0,1,0,1}
+        end
+        font:write(x_left, y, v.online, fontsize, unpack(col))
+    end
+
+    -- right side: IP addresses
+    y = y_start
+    font:write(x_right, y, "Eth:  " .. v.ethip, fontsize, 1,1,1,1)
+
+    y = y + offset
+    font:write(x_right, y, "WiFi: " .. v.wlanip, fontsize, 1,1,1,1)
+
 end

package.json

@@ -1,8 +1,8 @@
 {
-    "name": "c3voc testcard",
+    "name": "Info-beamer Testcard",
-    "author": "Kunsi <kunsi@c3voc.de>",
+    "author": "Jannik Beyerstedt <code@jbeyerstedt.de>",
     "desc": "testcard",
-    "repository": "https://git.kunsmann.eu/kunsi/icinga2beamer",
+    "repository": "https://git.beyerstedt.de/jannik/infobeamer-testcard",
     "nesting": {
         "parents": [
             "top-level"
@@ -17,4 +17,4 @@
         "support": "no",
         "info": "Needs to fetch information about itself from info-beamer api"
     }
-}
+}

service

@@ -1,12 +1,22 @@
 #!/usr/bin/python
 
+import os
 import sys
+import fcntl
+import socket
+import struct
+import requests
 import time
 import traceback
 
+from functools import partial
+from heapq import heappush, heapreplace
 from hosted import api, node
 
 
+sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+
+
 def fetch_info():
     info = api.device_info.get()
     print >> sys.stderr, info
@@ -18,11 +28,89 @@ def fetch_info():
     )
 
 
+def send(key, val):
+    sys.stderr.write("sending %s->%s\n" % (key, val))
+    sock.sendto('testcard/update/%s:%s' % (key, val), ('127.0.0.1', 4444))
+
+
+def get_default_gateway():
+    with open("/proc/net/route") as fh:
+        for line in fh:
+            fields = line.strip().split()
+            if fields[1] != '00000000' or not int(fields[3], 16) & 2:
+                continue
+            return socket.inet_ntoa(struct.pack("<L", int(fields[2], 16)))
+
+
+def get_ipv4(ifname):
+    try:
+        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+        info = fcntl.ioctl(s.fileno(), 0x8915,
+                           struct.pack('256s', ifname[:15]))
+        ip = socket.inet_ntoa(info[20:24])
+
+        mask = struct.unpack('>I', fcntl.ioctl(
+            s.fileno(), 0x891b, struct.pack('256s', ifname))[20:24])[0]
+        # Remember: not everything has to be performance optimal :-)
+        mask = bin(mask)[2:].count('1')
+        return "%s/%d" % (ip, mask)
+    except IOError:
+        return "<no ipv4>"
+    except:
+        return None
+
+
+def check_network():
+    return os.path.exists('/sd/config/network') and "static" or "dhcp"
+
+
+def check_internet():
+    try:
+        r = requests.get("http://ping.infobeamer.com/ping", timeout=10, headers={
+            'User-Agent': 'info-beamer syncer/network-check',
+        })
+        r.raise_for_status()
+        if r.content == "pong":
+            return "online"
+        else:
+            return "filtered"
+    except:
+        traceback.print_exc()
+        return "offline"
+
+
+tests = [
+    (1,  "ethip",   partial(get_ipv4, "eth0")),
+    (1,  "wlanip",  partial(get_ipv4, "wlan0")),
+    (1,  "gw",      get_default_gateway),
+    (10, "online",  check_internet),
+    (5,  "network", check_network),
+]
+
+q = []
+now = time.time()
+for interval, key, val_fn in tests:
+    heappush(q, (now, (interval, key, val_fn)))
+
+
+def run_next_test():
+    now = time.time()
+    t, test = q[0]
+    if now < t:
+        return False
+    interval, key, val_fn = test
+    heapreplace(q, (now + interval, test))
+    val = val_fn()
+    if val is not None:
+        send(key, val)
+    return True
+
+
 if __name__ == "__main__":
     while 1:
         try:
             fetch_info()
+            if not run_next_test():
+                time.sleep(1)
         except:
             traceback.print_exc()
-        finally:
-            time.sleep(15)