"Weak Network" error message about inb

[3ruce]

Instead of using ping as per this code

https://github.com/joshiayush/inb/blob/master/inb/lib/utils/net.py

Why not use wget or curl and download google.com's homepage and then delete the temp file to test the internet e.g.

wget -O inb-test-google-index.html google.com
rm inb-test-google-index.html

inb needs port 80/443 open while ping uses another, non-standard port

[3ruce]

Here's the fix for the problem with pinging not being allowed when running ping 8.8.8.8 and getting this error ping: socket: Operation not permitted, likely caused by using inb in an lxd container or similar...

Find out where the ping package is.It might have a different location. On my Ubuntu 18.04 machine, it is in /bin. Use type -a ping to locate it. Next, verify that it is there and is owned by root and is permed 755 (or similar)

ls -lsa /bin/ping
sudo chmod 4711 /bin/ping

Verify that the fix worked

ls -lsa /bin/ping
ping 8.8.8.8
ping 2600:3c01::f03c:92ff:fe3b:2efa

Via https://askubuntu.com/a/1189359

[joshiayush]

We need to replace the current ping function with the function is_internet_alive() defined below in order to make it platform independent. I guess Python socket will not have any issue with a LXD container.

inb/inb/lib/utils/net.py

Lines 29 to 52 in 57fe58d

	def ping(host: str = None) -> bool:
	"""Returns True if host (str) responds to a ping request.
	Remember that a host may not respond to a ping (ICMP) request even if the host
	name is valid.
	We avoid 'os.system' calls with 'subprocess.call' to avoid shell injection
	vulnerability.
	:Args:
	- host: {str} Hostname.
	:Returns:
	- {bool} True if server responds, false otherwise.
	"""
	if not host:
	host = "google.com"
	if platform.system().lower() == "windows":
	param = "-n"
	else:
	param = "-c"
	command: List[str] = ["ping", param, '1', host]
	return subprocess.call(command, stdout=subprocess.DEVNULL,
	stderr=subprocess.DEVNULL) == 0

Possible solutions

def is_internet_alive(host: str = '1.1.1.1', port: int = 53, timeout: int = 3) -> bool:
    """Check if Internet Connection is alive and external IP address is reachable.
    
    Args:
        host (string): 1.1.1.1 (DNS servver)
        port (integer): (53/tcp DNS Service).
        timeout (float): timeout in seconds.
    
    Returns:
        True (bool): if external IP address is reachable.
        False (bool): if external IP address is unreachable.
    """
    try:
        socket.setdefaulttimeout(timeout)
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.connect((host, port))
    except OSError as error:
        return False
    else:
        s.close()
    return True