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Merge pull request #420 from sim590/unpack-lua51-compat
[etc/awesome.git] / widget / net.lua
1 --[[
2
3      Licensed under GNU General Public License v2
4       * (c) 2013,      Luca CPZ
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  = string
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 wifi_state = args.wifi_state or "off"
24     local eth_state  = args.eth_state or "off"
25     local screen     = args.screen or 1
26     local settings   = args.settings or function() end
27
28     -- Compatibility with old API where iface was a string corresponding to 1 interface
29     net.iface = (args.iface and (type(args.iface) == "string" and {args.iface}) or
30                 (type(args.iface) == "table" and args.iface)) or {}
31
32     function net.get_device()
33         helpers.line_callback("ip link", function(line)
34             net.iface[#net.iface + 1] = not string.match(line, "LOOPBACK") and string.match(line, "(%w+): <") or nil
35         end)
36     end
37
38     if #net.iface == 0 then net.get_device() end
39
40     function net.update()
41         -- These are the totals over all specified interfaces
42         net_now = {
43             devices  = {},
44             -- Bytes since last iteration
45             sent     = 0,
46             received = 0
47         }
48
49         for _, dev in ipairs(net.iface) do
50             local dev_now    = {}
51             local dev_before = net.devices[dev] or { last_t = 0, last_r = 0 }
52             local now_t      = tonumber(helpers.first_line(string.format("/sys/class/net/%s/statistics/tx_bytes", dev)) or 0)
53             local now_r      = tonumber(helpers.first_line(string.format("/sys/class/net/%s/statistics/rx_bytes", dev)) or 0)
54
55             dev_now.carrier  = helpers.first_line(string.format("/sys/class/net/%s/carrier", dev)) or "0"
56             dev_now.state    = helpers.first_line(string.format("/sys/class/net/%s/operstate", dev)) or "down"
57
58             dev_now.sent     = (now_t - dev_before.last_t) / timeout / units
59             dev_now.received = (now_r - dev_before.last_r) / timeout / units
60
61             net_now.sent     = net_now.sent + dev_now.sent
62             net_now.received = net_now.received + dev_now.received
63
64             dev_now.sent     = string.format("%.1f", dev_now.sent)
65             dev_now.received = string.format("%.1f", dev_now.received)
66
67             dev_now.last_t   = now_t
68             dev_now.last_r   = now_r
69
70             if wifi_state == "on" and helpers.first_line(string.format("/sys/class/net/%s/uevent", dev)) == "DEVTYPE=wlan" and string.match(dev_now.carrier, "1") then
71                 dev_now.wifi   = true
72                 dev_now.signal = tonumber(string.match(helpers.lines_from("/proc/net/wireless")[3], "(%-%d+%.)")) or nil
73             end
74
75             if eth_state == "on" and helpers.first_line(string.format("/sys/class/net/%s/uevent", dev)) ~= "DEVTYPE=wlan" and string.match(dev_now.carrier, "1") then
76                 dev_now.ethernet = true
77             end
78
79             net.devices[dev] = dev_now
80
81             -- Notify only once when connection is lost
82             if string.match(dev_now.carrier, "0") and notify == "on" and helpers.get_map(dev) then
83                 naughty.notify {
84                     title    = dev,
85                     text     = "No carrier",
86                     icon     = helpers.icons_dir .. "no_net.png",
87                     screen   = screen
88                 }
89                 helpers.set_map(dev, false)
90             elseif string.match(dev_now.carrier, "1") then
91                 helpers.set_map(dev, true)
92             end
93
94             net_now.carrier = dev_now.carrier
95             net_now.state = dev_now.state
96             net_now.devices[dev] = dev_now
97             -- net_now.sent and net_now.received will be
98             -- the totals across all specified devices
99         end
100
101         net_now.sent = string.format("%.1f", net_now.sent)
102         net_now.received = string.format("%.1f", net_now.received)
103
104         widget = net.widget
105         settings()
106     end
107
108     helpers.newtimer("network", timeout, net.update)
109
110     return net
111 end
112
113 return factory