public static void initWifiConnection(GTM.GHIElectronics.WiFi_RS21 wifi, string wlanName, string wlanPassword)
{
Debug.Print("connecting to: " + wlanName);
if (wifi.Interface.IsOpen)
{
Debug.Print("interface was open");
}
else
{
Debug.Print("interface was not open");
wifi.Interface.Open();
}
wifi.Interface.WirelessConnectivityChanged +=
new WiFiRS9110.WirelessConnectivityChangedEventHandler((s, e) =>
{
Debug.Print("wifi conn changed!");
if (e.IsConnected) { Debug.Print("WIFI (" + wlanName + ") connected!"); }
else { Debug.Print("WIFI (" + wlanName + ") disconnected.."); }
});
wifi.DebugPrintEnabled = true;
wifi.UseDHCP();
GHI.Premium.Net.WiFiNetworkInfo info = new WiFiNetworkInfo();
info.SSID = wlanName;
info.SecMode = GHI.Premium.Net.SecurityMode.WPA2;
info.networkType = GHI.Premium.Net.NetworkType.AccessPoint;
wifi.Interface.Join(info, wlanPassword);
wifi.UseThisNetworkInterface();
}
internal bool Matches(WiFiNetworkInfo ap)
{
if (ap == null)
{
return(false);
}
if (!Prefix)
{
return(ap.SSID == SSID);
}
return(ap.SSID.Length >= SSID.Length && ap.SSID.Substring(0, SSID.Length) == SSID);
}
void Interface_NetworkAddressChanged(object sender, EventArgs e)
{
try
{
if (wifi.Interface.IsLinkConnected)
{
Debug.Print("WiFi up with AP " + currentAP.SSID);
Debug.Print("IP Address: " + wifi.Interface.NetworkInterface.IPAddress);
Debug.Print("Subnet Mask: " + wifi.Interface.NetworkInterface.SubnetMask);
Debug.Print("Gateway: " + wifi.Interface.NetworkInterface.GatewayAddress);
var dnsAddresses = wifi.Interface.NetworkInterface.DnsAddresses;
Debug.Print("DNS Server: " + (dnsAddresses == null ? "NULL" : (dnsAddresses.Length == 0 ? "none" : dnsAddresses[0])));
Debug.Print("Elapsed time from join: " + (GT.Timer.GetMachineTime() - joinTime).Seconds + "s");
wifiConnected = true;
SetScreen();
SetLed();
//SendUDPBroadcast();
WebServer.StartLocalServer(wifi.Interface.NetworkInterface.IPAddress, 80);
if (ConnectedToHomeNetwork)
{
OnHomeNetworkJoined();
}
}
else
{
wifiConnected = false;
WebServer.StopLocalServer();
SetLed();
SetScreen();
Debug.Print("Wifi down");
if (firstDown)
{
firstDown = false;
}
else
{
currentAP = null;
}
}
}
catch (Exception ex)
{
Debug.Print("Exception in Interface_WirelessConnectivityChanged: " + ex);
}
}
/// <summary>
/// Should be called by an application when the home network credentials should be forgotten, e.g. after a reset button is held down.
/// </summary>
public void ResetNetworkCredentials()
{
Debug.Print("Forgetting home wireless network credentials");
wifiNetworks.Clear();
if (EnableWifiSetupNetworks)
{
APDetails.AddSetupAPs(wifiNetworks);
}
SaveData();
WebServer.StopLocalServer();
currentAP = null;
SetLed();
wifi.Interface.Disconnect();
}
public void Start()
{
if (OpenWiFi() && EnableDHCP())
{
NetworkInterfaceExtension.AssignNetworkingStackTo(wifi);
WiFiNetworkInfo ni = SearchForNetwork();
if (!Join(ni))
{
if (Stopped != null)
{
Stopped(this, EventArgs.Empty);
}
}
}
}
// Step 3. Network Timer
void NetworkTimer_Tick(GT.Timer timer)
{
if (NetworkTimer.IsRunning == true)
{
wifi_RS21.Interface.Open();
wifi_RS21.UseDHCP();
WiFiNetworkInfo info = new WiFiNetworkInfo();
info.SSID = SSID;
info.SecMode = SecurityMode.WPA2;
info.networkType = NetworkType.AccessPoint;
wifi_RS21.NetworkUp -= wifi_RS21_NetworkUp;
wifi_RS21.NetworkDown -= wifi_RS21_NetworkDown;
wifi_RS21.NetworkUp += wifi_RS21_NetworkUp;
wifi_RS21.NetworkDown += wifi_RS21_NetworkDown;
wifi_RS21.Interface.Join(info, PASSWORD);
}
}
// secure reception of wifi credentials over wifi network - secured by receiving secret
void CredentialsWebEventReceived(string path, WebServer.HttpMethod method, Responder responder)
{
if (responder.UrlParameters == null || !responder.UrlParameters.Contains("ssid") || !responder.UrlParameters.Contains("setupauthcode"))
{
responder.Respond("ERROR::Syntax: " + path + "?ssid=SSID&setupauthcode=SETUPAUTHCODE[&key=WIFIKEY]");
return;
}
if (((string)responder.UrlParameters["setupauthcode"]) != SetupAuthCode)
{
responder.Respond("ERROR::Incorrect setupauthcode");
return;
}
var ssid = responder.UrlParameters["ssid"] as string;
if (ssid == null || ssid == "")
{
responder.Respond("ERROR::Invalid SSID");
return;
}
var key = "";
if (responder.UrlParameters.Contains("key"))
{
key = responder.UrlParameters["key"] as string;
}
Debug.Print("Received (via web event) credentials for network " + ssid);
bool newcreds = ReceivedCredentials(ssid, key);
if (newcreds)
{
responder.Respond("OK::Got new credentials");
SaveData();
Thread.Sleep(10);
WebServer.StopLocalServer();
currentAP = null;
SetLed();
SetScreen();
wifi.Interface.Disconnect();
}
else
{
responder.Respond("OK::Already had those");
}
}
private bool Join(WiFiNetworkInfo ni)
{
if (wifi.IsLinkConnected)
{
return(true);
}
try
{
Debug.Print("Connecting to " + ni.SSID + "...");
//blocker.Reset();
wifi.Join(ni, password);
while (wifi.NetworkInterface.IPAddress == "0.0.0.0")
{
Debug.Print("Waiting for IPAddress");
Thread.Sleep(250);
}
}
catch (NetworkInterfaceExtensionException e)
{
switch (e.errorCode)
{
case NetworkInterfaceExtensionException.ErrorCode.AuthenticationFailed: Debug.Print("AuthenticationFailed"); break;
//case NetworkInterfaceExtensionException.ErrorCode.AlreadyActivated: break;
default: Debug.Print(e.errorCode.ToString()); break;
}
//Debug.Print("Error Message: " + e.ErrorMsg);
//if (e.errorCode != NetworkInterfaceExtensionException.ErrorCode.AlreadyActivated)
return(false);
}
catch (Exception e)
{
Debug.Print("Error Message: " + e.Message);
return(false);
}
Debug.Print("Done connecting...\n");
//blocker.WaitOne();
Debug.Print("We got NetworkAvailable event. WiFi link is ready!\n");
return(true);
}
private static string WiFiNetworkInfoToString(WiFiNetworkInfo info)
{
string str = "SSID: " + info.SSID + "\n";
str += "Channel Number: " + info.ChannelNumber + "\n";
str += "RSSI: -" + info.RSSI + "dB" + "\n";
str += "Security Mode: ";
switch (info.SecMode)
{
case SecurityMode.Open: str += "Open"; break;
case SecurityMode.WEP: str += "WEP"; break;
case SecurityMode.WPA: str += "WPA"; break;
case SecurityMode.WPA2: str += "WPA2"; break;
}
;
str += "\n";
str += "Network Type: ";
switch (info.networkType)
{
case NetworkType.AccessPoint: str += "Access Point"; break;
case NetworkType.AdHoc: str += "AdHoc"; break;
}
str += "\n";
str += "BS MAC: " +
Utils.ByteToHex(info.PhysicalAddress[0]) + "-" +
Utils.ByteToHex(info.PhysicalAddress[1]) + "-" +
Utils.ByteToHex(info.PhysicalAddress[2]) + "-" +
Utils.ByteToHex(info.PhysicalAddress[3]) + "-" +
Utils.ByteToHex(info.PhysicalAddress[4]) + "-" +
Utils.ByteToHex(info.PhysicalAddress[5]);
str += "\n";
return(str);
}
void wifiTimer_Tick(GT.Timer timer)
{
Debug.Print("wifiTimer start - currentAP " + (currentAP != null ? currentAP.SSID : "(null)") + " wifiUp " + wifiConnected + (wifiConnected ? " IP " + wifi.Interface.NetworkInterface.IPAddress : ""));
if (sp != null)
{
var spMessage = BroadcastMessageWithNewline;
sp.Write(spMessage, 0, spMessage.Length);
}
if (SkipWifiTimer())
{
Debug.Print("aborting wifitimer tick since SkipWifiTimer delegate is true");
return;
}
if (wifiConnected && currentAP == null)
{
Debug.Print("ERROR: wifi is up but current AP is null! Disconnecting.");
currentAP = null;
wifiConnected = false;
SetLed();
SetScreen();
wifi.Interface.Disconnect();
WebServer.StopLocalServer();
return;
}
if (currentAP != null && !wifiConnected)
{
wifiUpTime++;
if (wifiUpTime == wifiUpTimeout)
{
Debug.Print("WARN: starting wifi for " + currentAP.SSID + " timeout - resetting currentAP");
currentAP = null;
wifiConnected = false;
SetLed();
SetScreen();
wifi.Interface.Disconnect();
WebServer.StopLocalServer();
return;
}
}
if (wifiConnected && currentAP != null && APDetails.IsSetupAP(currentAP))
{
if (GT.Timer.GetMachineTime() - joinTime > maxTimeOnSetupNetwork)
{
Debug.Print("Disconnecting from setup AP due to timeout (setup should not take this long)");
currentAP = null;
wifiConnected = false;
SetLed();
SetScreen();
wifi.Interface.Disconnect();
WebServer.StopLocalServer();
return;
}
else
{
// only sending unsolicited beacons when we're not on the home network
Debug.Print("Sending unsolicited UDP beacon since we're on a setup network");
SendUDPBroadcast(BeaconPort);
}
}
if (wifiConnected && currentAP != null)
{
if (!WebServer.IsRunning())
{
WebServer.StartLocalServer(wifi.Interface.NetworkInterface.IPAddress, 80);
}
}
// skip scanning when connected since it fails
if (currentAP == null)
{
try
{
var scan = wifi.Interface.Scan();
Thread.Sleep(1);
foreach (var ap in scan)
{
Debug.Print("Scanned AP " + ap.SSID + " rssi " + ap.RSSI);
}
if (scan != null)
{
foreach (APDetails knownAP in wifiNetworks)
{
// APs are in priority order, so break once we see the current ap
if (knownAP.Matches(currentAP))
{
break;
}
WiFiNetworkInfo joinAP = null;
foreach (var scanAP in scan)
{
if (!knownAP.Matches(scanAP))
{
continue;
}
if (joinAP == null)
{
joinAP = scanAP;
}
if (joinAP.RSSI > scanAP.RSSI)
{
joinAP = scanAP; // lower RSSI is better
}
}
if (joinAP == null)
{
continue;
}
try
{
if (currentAP != null)
{
Debug.Print("Disconnecting from WiFi network " + currentAP + " to join " + joinAP.SSID);
wifi.Interface.Disconnect();
}
//// stop pictimeout and any streaming since wifi join operation hogs processor
//picTimeout.Stop();
//camera.StopStreamingBitmaps();
joinTime = GT.Timer.GetMachineTime();
Debug.Print("Joining WiFi network " + joinAP.SSID + " rssi " + joinAP.RSSI);
//wifi.Interface.();
currentAP = joinAP;
SetLed();
SetScreen();
wifi.Interface.Join(joinAP, knownAP.Key);
//Debug.Print("Joined WiFi network " + scanAP.SSID);
wifiUpTime = 0;
break;
}
catch
{
Debug.Print("Error joining wifi network: " + joinAP.SSID);
wifi.Interface.Disconnect();
timer.Stop();
timer.Start();
currentAP = null;
SetLed();
SetScreen();
break;
}
}
}
}
catch (GHI.Premium.Net.NetworkInterfaceExtensionException wex)
{
wifi.Interface.Disconnect();
// restart the timer to prevent it immediately firing again
timer.Stop();
timer.Start();
Debug.Print("Error scanning wifi networks: " + wex);
currentAP = null;
setLedError();
setScreenError();
}
}
Debug.Print("wifiTimer end - currentAP " + (currentAP != null ? currentAP.SSID : "(null)") + " wifiUp " + wifiConnected);
}
internal static bool IsSetupAP(WiFiNetworkInfo ap)
{
return(SetupSecretAPNew.Matches(ap) || SetupSecretAP.Matches(ap) || SetupOpenAP.Matches(ap));
}
internal bool Matches(WiFiNetworkInfo ap)
{
if (ap == null) return false;
if (!Prefix)
{
return ap.SSID == SSID;
}
return ap.SSID.Length >= SSID.Length && ap.SSID.Substring(0, SSID.Length) == SSID;
}
private static string WiFiNetworkInfoToString(WiFiNetworkInfo info)
{
string str = "SSID: " + info.SSID + "\n";
str += "Channel Number: " + info.ChannelNumber + "\n";
str += "RSSI: -" + info.RSSI + "dB" + "\n";
str += "Security Mode: ";
switch (info.SecMode)
{
case SecurityMode.Open: str += "Open"; break;
case SecurityMode.WEP: str += "WEP"; break;
case SecurityMode.WPA: str += "WPA"; break;
case SecurityMode.WPA2: str += "WPA2"; break;
};
str += "\n";
str += "Network Type: ";
switch (info.networkType)
{
case NetworkType.AccessPoint: str += "Access Point"; break;
case NetworkType.AdHoc: str += "AdHoc"; break;
}
str += "\n";
str += "BS MAC: " +
Utils.ByteToHex(info.PhysicalAddress[0]) + "-" +
Utils.ByteToHex(info.PhysicalAddress[1]) + "-" +
Utils.ByteToHex(info.PhysicalAddress[2]) + "-" +
Utils.ByteToHex(info.PhysicalAddress[3]) + "-" +
Utils.ByteToHex(info.PhysicalAddress[4]) + "-" +
Utils.ByteToHex(info.PhysicalAddress[5]);
str += "\n";
return str;
}
private bool Join(WiFiNetworkInfo ni)
{
if (wifi.IsLinkConnected)
return true;
try
{
Debug.Print("Connecting to " + ni.SSID + "...");
//blocker.Reset();
wifi.Join(ni, password);
while (wifi.NetworkInterface.IPAddress == "0.0.0.0")
{
Debug.Print("Waiting for IPAddress");
Thread.Sleep(250);
}
}
catch (NetworkInterfaceExtensionException e)
{
switch (e.errorCode)
{
case NetworkInterfaceExtensionException.ErrorCode.AuthenticationFailed: Debug.Print("AuthenticationFailed"); break;
//case NetworkInterfaceExtensionException.ErrorCode.AlreadyActivated: break;
default: Debug.Print(e.errorCode.ToString()); break;
}
//Debug.Print("Error Message: " + e.ErrorMsg);
//if (e.errorCode != NetworkInterfaceExtensionException.ErrorCode.AlreadyActivated)
return false;
}
catch (Exception e)
{
Debug.Print("Error Message: " + e.Message);
return false;
}
Debug.Print("Done connecting...\n");
//blocker.WaitOne();
Debug.Print("We got NetworkAvailable event. WiFi link is ready!\n");
return true;
}
/// <summary>
/// Should be called by an application when the home network credentials should be forgotten, e.g. after a reset button is held down.
/// </summary>
public void ResetNetworkCredentials()
{
Debug.Print("Forgetting home wireless network credentials");
wifiNetworks.Clear();
if(EnableWifiSetupNetworks) APDetails.AddSetupAPs(wifiNetworks);
SaveData();
WebServer.StopLocalServer();
currentAP = null;
SetLed();
wifi.Interface.Disconnect();
}
// secure reception of wifi credentials over wifi network - secured by receiving secret
void CredentialsWebEventReceived(string path, WebServer.HttpMethod method, Responder responder)
{
if (responder.UrlParameters == null || !responder.UrlParameters.Contains("ssid") || !responder.UrlParameters.Contains("setupauthcode"))
{
responder.Respond("ERROR::Syntax: " + path + "?ssid=SSID&setupauthcode=SETUPAUTHCODE[&key=WIFIKEY]");
return;
}
if (((string)responder.UrlParameters["setupauthcode"]) != SetupAuthCode)
{
responder.Respond("ERROR::Incorrect setupauthcode");
return;
}
var ssid = responder.UrlParameters["ssid"] as string;
if (ssid == null || ssid == "")
{
responder.Respond("ERROR::Invalid SSID");
return;
}
var key = "";
if (responder.UrlParameters.Contains("key"))
{
key = responder.UrlParameters["key"] as string;
}
Debug.Print("Received (via web event) credentials for network " + ssid);
bool newcreds = ReceivedCredentials(ssid, key);
if (newcreds)
{
responder.Respond("OK::Got new credentials");
SaveData();
Thread.Sleep(10);
WebServer.StopLocalServer();
currentAP = null;
SetLed();
SetScreen();
wifi.Interface.Disconnect();
}
else
{
responder.Respond("OK::Already had those");
}
}
void Interface_NetworkAddressChanged(object sender, EventArgs e)
{
try
{
if (wifi.Interface.IsLinkConnected)
{
Debug.Print("WiFi up with AP " + currentAP.SSID);
Debug.Print("IP Address: " + wifi.Interface.NetworkInterface.IPAddress);
Debug.Print("Subnet Mask: " + wifi.Interface.NetworkInterface.SubnetMask);
Debug.Print("Gateway: " + wifi.Interface.NetworkInterface.GatewayAddress);
var dnsAddresses = wifi.Interface.NetworkInterface.DnsAddresses;
Debug.Print("DNS Server: " + (dnsAddresses == null ? "NULL" : (dnsAddresses.Length == 0 ? "none" : dnsAddresses[0])));
Debug.Print("Elapsed time from join: " + (GT.Timer.GetMachineTime() - joinTime).Seconds + "s");
wifiConnected = true;
SetScreen();
SetLed();
//SendUDPBroadcast();
WebServer.StartLocalServer(wifi.Interface.NetworkInterface.IPAddress, 80);
if (ConnectedToHomeNetwork)
{
OnHomeNetworkJoined();
}
}
else
{
wifiConnected = false;
WebServer.StopLocalServer();
SetLed();
SetScreen();
Debug.Print("Wifi down");
if (firstDown)
{
firstDown = false;
}
else
{
currentAP = null;
}
}
}
catch (Exception ex)
{
Debug.Print("Exception in Interface_WirelessConnectivityChanged: " + ex);
}
}
void wifiTimer_Tick(GT.Timer timer)
{
Debug.Print("wifiTimer start - currentAP " + (currentAP != null ? currentAP.SSID : "(null)") + " wifiUp " + wifiConnected + (wifiConnected ? " IP " + wifi.Interface.NetworkInterface.IPAddress : ""));
if (sp != null)
{
var spMessage = BroadcastMessageWithNewline;
sp.Write(spMessage, 0, spMessage.Length);
}
if (SkipWifiTimer())
{
Debug.Print("aborting wifitimer tick since SkipWifiTimer delegate is true");
return;
}
if (wifiConnected && currentAP == null)
{
Debug.Print("ERROR: wifi is up but current AP is null! Disconnecting.");
currentAP = null;
wifiConnected = false;
SetLed();
SetScreen();
wifi.Interface.Disconnect();
WebServer.StopLocalServer();
return;
}
if (currentAP != null && !wifiConnected)
{
wifiUpTime++;
if (wifiUpTime == wifiUpTimeout)
{
Debug.Print("WARN: starting wifi for " + currentAP.SSID + " timeout - resetting currentAP");
currentAP = null;
wifiConnected = false;
SetLed();
SetScreen();
wifi.Interface.Disconnect();
WebServer.StopLocalServer();
return;
}
}
if (wifiConnected && currentAP != null && APDetails.IsSetupAP(currentAP))
{
if (GT.Timer.GetMachineTime() - joinTime > maxTimeOnSetupNetwork)
{
Debug.Print("Disconnecting from setup AP due to timeout (setup should not take this long)");
currentAP = null;
wifiConnected = false;
SetLed();
SetScreen();
wifi.Interface.Disconnect();
WebServer.StopLocalServer();
return;
}
else
{
// only sending unsolicited beacons when we're not on the home network
Debug.Print("Sending unsolicited UDP beacon since we're on a setup network");
SendUDPBroadcast(BeaconPort);
}
}
if (wifiConnected && currentAP != null)
{
if (!WebServer.IsRunning()) WebServer.StartLocalServer(wifi.Interface.NetworkInterface.IPAddress, 80);
}
// skip scanning when connected since it fails
if (currentAP == null)
{
try
{
var scan = wifi.Interface.Scan();
Thread.Sleep(1);
foreach (var ap in scan)
{
Debug.Print("Scanned AP " + ap.SSID + " rssi " + ap.RSSI);
}
if (scan != null) foreach (APDetails knownAP in wifiNetworks)
{
// APs are in priority order, so break once we see the current ap
if (knownAP.Matches(currentAP)) break;
WiFiNetworkInfo joinAP = null;
foreach (var scanAP in scan)
{
if (!knownAP.Matches(scanAP)) continue;
if (joinAP == null) joinAP = scanAP;
if (joinAP.RSSI > scanAP.RSSI) joinAP = scanAP; // lower RSSI is better
}
if (joinAP == null) continue;
try
{
if (currentAP != null)
{
Debug.Print("Disconnecting from WiFi network " + currentAP + " to join " + joinAP.SSID);
wifi.Interface.Disconnect();
}
//// stop pictimeout and any streaming since wifi join operation hogs processor
//picTimeout.Stop();
//camera.StopStreamingBitmaps();
joinTime = GT.Timer.GetMachineTime();
Debug.Print("Joining WiFi network " + joinAP.SSID + " rssi " + joinAP.RSSI);
//wifi.Interface.();
currentAP = joinAP;
SetLed();
SetScreen();
wifi.Interface.Join(joinAP, knownAP.Key);
//Debug.Print("Joined WiFi network " + scanAP.SSID);
wifiUpTime = 0;
break;
}
catch
{
Debug.Print("Error joining wifi network: " + joinAP.SSID);
wifi.Interface.Disconnect();
timer.Stop();
timer.Start();
currentAP = null;
SetLed();
SetScreen();
break;
}
}
}
catch (GHI.Premium.Net.NetworkInterfaceExtensionException wex)
{
wifi.Interface.Disconnect();
// restart the timer to prevent it immediately firing again
timer.Stop();
timer.Start();
Debug.Print("Error scanning wifi networks: " + wex);
currentAP = null;
setLedError();
setScreenError();
}
}
Debug.Print("wifiTimer end - currentAP " + (currentAP != null ? currentAP.SSID : "(null)") + " wifiUp " + wifiConnected);
}
internal static bool IsSetupAP(WiFiNetworkInfo ap)
{
return SetupSecretAPNew.Matches(ap) || SetupSecretAP.Matches(ap) || SetupOpenAP.Matches(ap);
}
