/*
* Returns the number of default gateways
* in the routing table. Default gateways
* have destination IPs of 0.0.0.0.
*/
public static int DiagnoseMultipleDefaultGateways(IPForwardTable routingTable)
{
int defaultGateways = 0;
foreach (IPFORWARDROW forwardRow in routingTable.Table)
{
if (forwardRow.dwForwardDest == 0)
{
++defaultGateways;
}
}
return(defaultGateways);
}
private bool RunAutomaticDiagnoses()
{
bool issuesDetected = false;
NetworkInterface wifiAdapter = Diagnosis.GetAdapter("Wi-Fi");
IPForwardTable routingTable = Diagnosis.GetIPForwardTable();
IPAddress localIP = Diagnosis.GetLocalIP();
if (wifiAdapter == null)
{
string message =
"Detected: Failed to get the wi-fi adapter.\n\n" +
"The interface may be offline or nonexistant.\n\n" +
"In the main dialog, choose \"Manage Network Adapters\"" +
"and ensure the adapter named \"Wi-Fi\" exists, and is enabled.\n\n" +
"If the problem persists, create a report to send\n" +
"to your support staff by choosing \"Generate Text Report.\"";
MessageBox.Show(message, "HD Diagnostic Utility");
//if we can't get the interface, there's not
//much other diagnosis we can do
return(true);
}
if (Diagnosis.DiagnoseDHCPDisabled(wifiAdapter))
{
string message =
"Detected: DHCP is disabled.\n\n" +
"In the main dialog, choose \"Enable DHCP\" under\n" +
"\"Troubleshooting Options.\"\n" +
"If the problem persists, try choosing Automatic Diagnosis\n" +
"again.\n\n" +
"If the problem still persists, create a report to send\n" +
"to your support staff by choosing \"Generate Text Report.\"";
MessageBox.Show(message, "HD Diagnostic Utility");
//DHCP should be enabled
//before we attempt to solve other problems
return(true);
}
if (Diagnosis.DiagnoseIllegalDNSServers(wifiAdapter))
{
string message =
"Detected: DNS servers are not set to be automatically acquired.\n\n" +
"In the main dialog, choose \"Reset DNS Servers\" under\n" +
"\"Troubleshooting Options.\"";
MessageBox.Show(message, "HD Diagnostic Utility");
issuesDetected = true;
}
int defaultGateways = Diagnosis.DiagnoseMultipleDefaultGateways(routingTable);
if (defaultGateways == 0)
{
string message =
"Detected: There is no default gateway in the IP routing table.\n\n" +
"Create a report to send to your support staff\n" +
"by choosing \"Generate Text Report.\" in the main dialog.";
MessageBox.Show(message, "HD Diagnostic Utility");
issuesDetected = true;
}
else if (defaultGateways > 1)
{
string message =
"Detected: There are multiple default gateways in the IP routing table.\n\n" +
"There may be more than one active network interface.\n" +
"When more than one network interface is active, Windows\n" +
"can become confused and route network traffic incorrectly.\n\n" +
"In the main dialog, choose \"Manage Network Adapters\"\n" +
"and ensure the only enabled adapter is the \"Wi-Fi\" adapter.\n\n" +
"If the problem persists, choose \"Disable Tunnelling\" in\n" +
"the main dialog.\n\n" +
"If the problem still persists, create a report to send\n" +
"to your support staff by choosing \"Generate Text Report.\"";
MessageBox.Show(message, "HD Diagnostic Utility");
issuesDetected = true;
}
if (localIP == null)
{
string message =
"Detected: Failed to determine the local IP.\n\n" +
"There is no local IP available.\n\n" +
"Create a report to send to your support staff\n" +
"by choosing \"Generate Text Report.\" in the main dialog.";
MessageBox.Show(message, "HD Diagnostic Utility");
issuesDetected = true;
}
else if (Diagnosis.DiagnoseLocalIpUnrecognizedRange(localIP))
{
string message =
"Detected: Local IP is not in a known RPI network range.\n\n" +
"Create a report to send to your support staff\n" +
"by choosing \"Generate Text Report.\" in the main dialog.";
MessageBox.Show(message, "HD Diagnostic Utility");
issuesDetected = true;
}
if (Diagnosis.DiagnoseNetBIOSOverTcpip(wifiAdapter))
{
string message =
"Detected: NetBIOS over TCP/IP is enabled.\n\n" +
"In the main dialog, choose \"Disable NetBIOS over TCP/IP.\"\n\n" +
"If the problem persists, create a report to send\n" +
"to your support staff by choosing \"Generate Text Report.\"";
MessageBox.Show(message, "HD Diagnostic Utility");
issuesDetected = true;
}
return(issuesDetected);
}
