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lain: wiki updated
[etc/awesome.git] / widgets / net.lua
1
2 --[[
3                                                   
4      Licensed under GNU General Public License v2 
5       * (c) 2013,      Luke Bonham                
6       * (c) 2010-2012, Peter Hofmann              
7                                                   
8 --]]
9
10 local helpers      = require("lain.helpers")
11 local naughty      = require("naughty")
12 local wibox        = require("wibox")
13
14 local string       = { format = string.format,
15                        gsub   = string.gsub,
16                        match  = string.match }
17
18 local setmetatable = setmetatable
19
20 -- Network infos
21 -- lain.widgets.net
22
23 local function worker(args)
24     local net = { last_t = 0, last_r = 0 }
25
26     function net.get_first_device()
27         local ws = helpers.read_pipe("ip link show | cut -d' ' -f2,9")
28         ws = ws:match("%w+: UP") or ws:match("ppp%w+: UNKNOWN")
29         if ws then return { ws:match("(%w+):") }
30         else return {} end
31     end
32
33     local args     = args or {}
34     local timeout  = args.timeout or 2
35     local units    = args.units or 1024 --kb
36     local notify   = args.notify or "on"
37     local screen   = args.screen or 1
38     local settings = args.settings or function() end
39     local iface    = args.iface or net.get_first_device()
40
41     net.widget = wibox.widget.textbox('')
42
43     -- Compatibility with old API where iface was a string corresponding to 1 interface
44     if type(iface) == "string" then
45         iftable = {iface}
46     else
47         iftable = iface
48     end
49
50     -- Mark all devices as initially online/active
51     for i, dev in ipairs(iftable) do
52         helpers.set_map(dev, true)
53     end
54
55     function update()
56         -- These are the totals over all specified interfaces
57         net_now = {
58             sent     = 0,
59             received = 0
60         }
61
62         -- Total bytes transfered
63         local total_t = 0
64         local total_r = 0
65
66         for i, dev in ipairs(iftable) do
67             local dev_now = {}
68             local dev_before = net_now[dev] or net
69
70             dev_now.carrier  = helpers.first_line(string.format('/sys/class/net/%s/carrier', dev)) or '0'
71             dev_now.state    = helpers.first_line(string.format('/sys/class/net/%s/operstate', dev)) or 'down'
72
73             local now_t      = tonumber(helpers.first_line(string.format('/sys/class/net/%s/statistics/tx_bytes', dev)) or 0)
74             local now_r      = tonumber(helpers.first_line(string.format('/sys/class/net/%s/statistics/rx_bytes', dev)) or 0)
75
76             if now_t ~= dev_before.last_t or now_r ~= dev_before.last_r then
77                 dev_now.sent     = (now_t - (dev_before.last_t or 0)) / timeout / units
78                 net_now.sent     = net_now.sent + dev_now.sent
79                 dev_now.sent     = string.gsub(string.format('%.1f', dev_now.sent), ',', '.')
80                 dev_now.received = (now_r - (dev_before.last_r or 0)) / timeout / units
81                 net_now.received = net_now.received + dev_now.received
82                 dev_now.received = string.gsub(string.format('%.1f', dev_now.received), ',', '.')
83             end
84
85             total_t  = total_t + now_t
86             total_r  = total_r + now_r
87
88             net_now[dev] = dev_now
89
90             if string.match(dev_now.carrier, "0") and notify == "on" and helpers.get_map(dev) then
91                 naughty.notify({
92                     title    = dev,
93                     text     = "no carrier",
94                     icon     = helpers.icons_dir .. "no_net.png",
95                     screen   = screen
96                 })
97                 helpers.set_map(dev, false)
98             else
99                 helpers.set_map(dev, true)
100             end
101         end
102
103         if total_t ~= net.last_t or total_r ~= net.last_r then
104             net_now.sent     = string.gsub(string.format('%.1f', net_now.sent), ',', '.')
105             net_now.received = string.gsub(string.format('%.1f', net_now.received), ',', '.')
106
107             widget = net.widget
108             settings()
109
110             net.last_t = total_t
111             net.last_r = total_r
112         end
113     end
114
115     helpers.newtimer(iface, timeout, update)
116
117     return setmetatable(net, { __index = net.widget })
118 end
119
120 return setmetatable({}, { __call = function(_, ...) return worker(...) end })