111 lines
3.7 KiB
Python
111 lines
3.7 KiB
Python
"""
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A module to show currently active network connection (ethernet or wifi) and connection strength if the connection is wireless.
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"""
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import util.cli
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import util.format
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import core.module
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import core.widget
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import core.input
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import netifaces
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import socket
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class Module(core.module.Module):
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@core.decorators.every(seconds=5)
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def __init__(self, config, theme):
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super().__init__(config, theme, core.widget.Widget(self.network))
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self.__is_wireless = False
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self.__is_connected = False
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self.__interface = None
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self.__message = None
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self.__signal = -110
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# Get network information to display to the user
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def network(self, widgets):
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# Determine whether there is an internet connection
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try:
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socket.create_connection(("1.1.1.1", 53))
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self.__is_connected = True
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except Exception:
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self.__is_connected = False
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# Attempt to extract a valid network interface device
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try:
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self.__interface = netifaces.gateways()["default"][netifaces.AF_INET][1]
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except Exception:
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self.__interface = None
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# Check to see if the interface (if connected to the internet) is wireless
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if self.__is_connected and self.__interface:
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try:
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with open("/proc/net/wireless", "r") as f:
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self.__is_wireless = self.__interface in f.read()
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f.close()
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except Exception:
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self.__is_wireless = False
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# setup message to send to the user
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if not self.__is_connected or not self.__interface:
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self.__message = "No connection"
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elif not self.__is_wireless:
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# Assuming that if user is connected via non-wireless means that it will be ethernet
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self.__signal = -30
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self.__message = "Ethernet"
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else:
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# We have a wireless connection
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iw_dat = util.cli.execute("iwgetid")
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has_ssid = "ESSID" in iw_dat
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signal = self.__compute_signal(self.__interface)
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# If signal is None, that means that we can't compute the default interface's signal strength
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self.__signal = (
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util.format.asint(signal, minimum=-110, maximum=-30) if signal else None
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)
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ssid = (
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iw_dat[iw_dat.index(":") + 1 :].replace('"', "").strip()
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if has_ssid
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else "Unknown"
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)
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self.__message = self.__generate_wireles_message(ssid, self.__signal)
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return self.__message
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# State determined by signal strength
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def state(self, widget):
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if self.__compute_strength(self.__signal) < 50:
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return "critical"
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if self.__compute_strength(self.__signal) < 75:
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return "warning"
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return None
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# manually done for better granularity / ease of parsing strength data
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def __generate_wireles_message(self, ssid, signal):
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computed_strength = self.__compute_strength(signal)
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strength_str = str(computed_strength) if computed_strength else "?"
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return "{} {}%".format(ssid, strength_str)
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def __compute_strength(self, signal):
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return int(100 * ((signal + 100) / 70.0)) if signal else None
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# get signal strength in decibels/milliwat
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def __compute_signal(self, interface):
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# Get connection strength
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cmd = "iwconfig {}".format(interface)
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config_dat = " ".join(util.cli.execute(cmd).split())
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config_tokens = config_dat.replace("=", " ").split()
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# handle weird output
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try:
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signal = config_tokens[config_tokens.index("level") + 1]
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except Exception:
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signal = None
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return signal
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