public async Task <NetworkControllerStatus> GetNetworkControllerStatusAsync(CancellationToken cs)
{
try
{
string output = await CommandExecutor.Execute(
LinuxTrafficControllerHelper.CommandName,
LinuxTrafficControllerHelper.GetShowRules(this.networkInterfaceName),
cs);
// parse output to see if online or offline
if (output.Contains("qdisc noqueue"))
{
Log.LogDebug("No rule is set");
return(NetworkControllerStatus.Disabled);
}
else
{
Log.LogDebug($"Found rules {output}");
return(NetworkControllerStatus.Enabled);
}
}
catch (Exception e)
{
Log.LogError(e, "Failed to get network status");
return(NetworkControllerStatus.Unknown);
}
}
async Task <bool> AddDropRule(CancellationToken cs)
{
try
{
IPAddress[] iothubAddresses = await Dns.GetHostAddressesAsync(this.iotHubHostname);
if (iothubAddresses.Length == 0)
{
throw new CommandExecutionException("No IP found for iothub hostname");
}
foreach (var item in iothubAddresses)
{
Log.LogInformation($"Found iotHub IP {item}");
}
// Adding rules to filter packages by iotHub IP
// Details about how the rules work https://wiki.archlinux.org/index.php/Advanced_traffic_control
Log.LogInformation($"Executing: {LinuxTrafficControllerHelper.GetRootRule(this.networkInterfaceName)}");
await CommandExecutor.Execute(
LinuxTrafficControllerHelper.CommandName,
LinuxTrafficControllerHelper.GetRootRule(this.networkInterfaceName),
cs);
Log.LogInformation($"Executing: {LinuxTrafficControllerHelper.GetNetworkEmulatorAddRule(this.networkInterfaceName, this.profileRuleSettings)}");
await CommandExecutor.Execute(
LinuxTrafficControllerHelper.CommandName,
LinuxTrafficControllerHelper.GetNetworkEmulatorAddRule(this.networkInterfaceName, this.profileRuleSettings),
cs);
Log.LogInformation($"Executing: {LinuxTrafficControllerHelper.GetIpFilter(this.networkInterfaceName, iothubAddresses)}");
await CommandExecutor.Execute(
LinuxTrafficControllerHelper.CommandName,
LinuxTrafficControllerHelper.GetIpFilter(this.networkInterfaceName, iothubAddresses),
cs);
return(true);
}
catch (Exception e)
{
Log.LogError(e, "Failed to set drop rule");
return(false);
}
}
async Task <bool> RemoveDropRule(CancellationToken cs)
{
try
{
// Delete the root rules cleans the chilldren rules
await CommandExecutor.Execute(
LinuxTrafficControllerHelper.CommandName,
LinuxTrafficControllerHelper.GetRemoveAllArguments(this.networkInterfaceName),
cs);
return(true);
}
catch (Exception e)
{
Log.LogError(e, "Failed to set accept rule");
return(false);
}
}