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a72fc3de4addfd85d246c77e1df5057f31c87aae
[etc/awesome.git] / widget / net.lua
1 --[[
2
3      Licensed under GNU General Public License v2
4       * (c) 2013,      Luke Bonham
5       * (c) 2010-2012, Peter Hofmann
6
7 --]]
8
9 local helpers = require("lain.helpers")
10 local naughty = require("naughty")
11 local wibox   = require("wibox")
12 local string  = { format = string.format, match = string.match }
13
14 -- Network infos
15 -- lain.widget.net
16
17 local function factory(args)
18     local net      = { widget = wibox.widget.textbox(), devices = {} }
19     local args     = args or {}
20     local timeout  = args.timeout or 2
21     local units    = args.units or 1024 -- KB
22     local notify   = args.notify or "on"
23     local screen   = args.screen or 1
24     local settings = args.settings or function() end
25
26     -- Compatibility with old API where iface was a string corresponding to 1 interface
27     net.iface = (args.iface and (type(args.iface) == "string" and {args.iface}) or
28                 (type(args.iface) == "table" and args.iface)) or {}
29
30     function net.get_device()
31         helpers.async(string.format("ip link show", device_cmd), function(ws)
32             ws = ws:match("(%w+): <BROADCAST,MULTICAST,.-UP,LOWER_UP>")
33             net.iface = ws and { ws } or {}
34         end)
35     end
36
37     if #net.iface == 0 then net.get_device() end
38
39     function net.update()
40         -- These are the totals over all specified interfaces
41         net_now = {
42             devices  = {},
43             -- Bytes since last iteration
44             sent     = 0,
45             received = 0
46         }
47
48         for i, dev in ipairs(net.iface) do
49             local dev_now    = {}
50             local dev_before = net.devices[dev] or { last_t = 0, last_r = 0 }
51             local now_t      = tonumber(helpers.first_line(string.format("/sys/class/net/%s/statistics/tx_bytes", dev)) or 0)
52             local now_r      = tonumber(helpers.first_line(string.format("/sys/class/net/%s/statistics/rx_bytes", dev)) or 0)
53
54             dev_now.carrier  = helpers.first_line(string.format("/sys/class/net/%s/carrier", dev)) or "0"
55             dev_now.state    = helpers.first_line(string.format("/sys/class/net/%s/operstate", dev)) or "down"
56
57             dev_now.sent     = (now_t - dev_before.last_t) / timeout / units
58             dev_now.received = (now_r - dev_before.last_r) / timeout / units
59
60             net_now.sent     = net_now.sent + dev_now.sent
61             net_now.received = net_now.received + dev_now.received
62
63             dev_now.sent     = string.format("%.1f", dev_now.sent)
64             dev_now.received = string.format("%.1f", dev_now.received)
65
66             dev_now.last_t   = now_t
67             dev_now.last_r   = now_r
68
69             net.devices[dev] = dev_now
70
71             -- Notify only once when connection is loss
72             if string.match(dev_now.carrier, "0") and notify == "on" and helpers.get_map(dev) then
73                 naughty.notify {
74                     title    = dev,
75                     text     = "No carrier",
76                     icon     = helpers.icons_dir .. "no_net.png",
77                     screen   = screen
78                 }
79                 helpers.set_map(dev, false)
80             elseif string.match(dev_now.carrier, "1") then
81                 helpers.set_map(dev, true)
82             end
83
84             net_now.carrier = dev_now.carrier
85             net_now.state = dev_now.state
86             net_now.devices[dev] = dev_now
87             -- new_now.sent and net_now.received will be
88             -- the totals across all specified devices
89         end
90
91         net_now.sent = string.format("%.1f", net_now.sent)
92         net_now.received = string.format("%.1f", net_now.received)
93
94         widget = net.widget
95         settings()
96     end
97
98     helpers.newtimer("network", timeout, net.update)
99
100     return net
101 end
102
103 return factory