EapTlsResult EapTls_DiagnoseNetwork()

in EAP-TLS_Solution/EAP-TLS Client/lib/eap_tls_lib.c [308:421]
101 lines of code
19 McCabe index (conditional complexity)

EapTlsResult EapTls_DiagnoseNetwork(const char *networkName)
{
	EapTlsResult iRes = EapTlsResult_Error;

	if (NULL != networkName)
	{
		int networkID = WifiConfig_GetNetworkIdByConfigName(networkName);
		if (-1 == networkID)
		{
			iRes = EapTlsResult_NetworkUnknown;
			EapTls_Log("Cannot find network configuration '%s': errno=%d (%s)\n", networkName, errno, strerror(errno));
		}
		else
		{
			WifiConfig_NetworkDiagnostics networkDiagnostics;
			int res = WifiConfig_GetNetworkDiagnostics(networkID, &networkDiagnostics);
			if (-1 == res)
			{
				iRes = EapTlsResult_FailedDiagnosingNetwork;
				EapTls_Log("Failed getting diagnostics for network '%s' - Id[%d]: errno=%d (%s)\n", networkName, networkID, errno, strerror(errno));
			}
			else
			{
				// Check the connection state, and report eventual errors
				if (networkDiagnostics.isConnected)
				{
					iRes = EapTlsResult_Connected;
				}
				else
				{
					switch (networkDiagnostics.error)
					{
						case 2: // NetworkNotFound = 2 : Network was not found.
						{
							iRes = EapTlsResult_NetworkUnknown;
							EapTls_Log("Network '%s' - Id[%d] not found!\n", networkName, networkID);
						}
						break;


						case 5: // AuthenticationFailed = 5: Authentication failed. This error is thrown for EAP-TLS
						{
							// Let's attempt requesting new certificates (we already validated the certs at the first state)
							switch (networkDiagnostics.certError)
							{
								case 101: // InvalidRootCA
								{
									iRes = EapTlsResult_AuthenticationError_InvalidRootCaCert;
								}
								break;

								case 102: // InvalidClientAuth
								{
									iRes = EapTlsResult_AuthenticationError_InvalidClientCert;
								}
								break;
								
								case 103: // UnknownClientId
								{
									iRes = EapTlsResult_AuthenticationError_InvalidClientIdentity;
								}
								break;

								default:
								{
									iRes = EapTlsResult_AuthenticationError;
								}
								break;
							}

							EapTls_Log("Authentication error connecting to network '%s' - Id[%d]: error=%d, certError=%d\n", networkName, networkID, networkDiagnostics.error, networkDiagnostics.certError);
						}
						break;

						case 1:  // ConnectionFailed = 1 : Generic error message when connection fails.
						case 3:  // NoPskIncluded = 3: Network password is missing.
						case 4:  // WrongKey = 4: Network is using an incorrect password.
						case 6:  // SecurityTypeMismatch = 6: The stored network's security type does not match the available network.
						case 7:  // NetworkFrequencyNotAllowed = 7: Network frequency not allowed.
						case 8:  // NetworkNotEssPbssMbss = 8: Network is not supported because no ESS, PBSS or MBSS was detected.
						case 9:  // NetworkNotSupported = 9: Network is not supported.
						case 10: // NetworkNonWpa = 10: Network is not WPA2PSK, WPA2EAP or Open.
						{
							iRes = EapTlsResult_ConnectionError;
							EapTls_Log("FAILED connecting to network '%s' - Id[%d]: error=%d\n", networkName, networkID, networkDiagnostics.error);
						}
						break;

						default:
						{
							EapTls_Log("ERROR connecting to network '%s' - Id[%d]: error=%d\n", networkName, networkID, networkDiagnostics.error);
							if (!networkDiagnostics.isEnabled)
							{
								iRes = EapTlsResult_NetworkDisabled;
							}
							else
							{
								// This should never happen!
								iRes = EapTlsResult_BadParameters;
							}
						}
						break;
					}
				}
			}
		}
	}
	else
	{
		iRes = EapTlsResult_BadParameters;
	}

	return iRes;
}