Hello all,
I am attempting to have a reliable and autoreconnect system based on G400.
The G400 based device is sending and receiving data from a computer using udp and tcp stream and ftp.
This involves to launch an event if the ip adress change, if the cable is connected etc…
Is there a way to do it? (Networkavailability changed seems not working)
Network up/down cable disconnect / connect works like a charm on my G400 Header with build in ethernet. Independent if the board starts with or without network cable attached.
I was also struggling with this subject but problems dissapeared when i moved some code before nic.open() is called.
tested and worked on spider / emx / g400 with enc28, RS9110 and build in ethernet
Although RS9110 does not fire a disconnect event but that will be resolved in the next SDK
Here’s a copy paste of some code to get an idea.
_nic = new EthernetBuiltIn();
// Remark 2014-12-01 : It seems to be important to set IP before nic open
if (_useDHCP)
{
if (!_nic.IsDhcpEnabled)
{
_nic.EnableDhcp();
_nic.EnableDynamicDns();
}
}
else
{
_nic.EnableStaticIP(_deviceIP, _deviceSubNetMask, _deviceGateWayIP);
_nic.EnableStaticDns(_dnsServerIPs);
}
NetworkChange.NetworkAddressChanged += NetworkChangeNetworkAddressChanged;
NetworkChange.NetworkAvailabilityChanged += NetworkChangeNetworkAvailabilityChanged;
if (!_nic.Opened)
_nic.Open();
/*
_wifiConnectThread = new Thread(EstablishWiFiConnection) { Priority = ThreadPriority.Highest };
_wifiConnectThread.Start();
*/
DebugHelper.Print("IDLE..");
private void NetworkChangeNetworkAddressChanged(object sender, EventArgs e)
{
//_addressChange = true;
if (IPAddress.GetDefaultLocalAddress().Equals(IPAddress.Any))
{
DebugHelper.DebugPrint("IP=" + IPAddress.GetDefaultLocalAddress());
}
else
{
DebugHelper.DebugPrint("IP=" + IPAddress.GetDefaultLocalAddress());
DebugHelper.Print("Start network services >>>");
if (_dhcpServer != null) _dhcpServer.Start();
if (_dnsServer != null) _dnsServer.Start(IPAddress.GetDefaultLocalAddress());
if (_mdnsServer != null) _mdnsServer.Start(IPAddress.GetDefaultLocalAddress());
if (_llmnr != null) _llmnr.Start(IPAddress.GetDefaultLocalAddress());
if (_httpServer != null) _httpServer.Start();
}
}
private void NetworkChangeNetworkAvailabilityChanged(object sender, NetworkAvailabilityEventArgs e)
{
if (e.IsAvailable)
{
DebugHelper.Print("Connected");
}
else
{
DebugHelper.Print("Lost connection. request services to stop if network in infrastructure mode");
if (!_one2oneConnection)
{
if (_dhcpServer != null) _dhcpServer.Stop();
if (_dnsServer != null) _dnsServer.Stop();
if (_mdnsServer != null) _mdnsServer.Stop();
if (_llmnr != null) _llmnr.Stop();
if (_httpServer != null) _httpServer.Stop();
}
/*
// WiFi lost connection with router in case of infra structure
if (_wifiConnectThread.IsAlive) // TODO 2014-12-01 : Test if this is correct
return;
_wifiConnectThread = new Thread(EstablishWiFiConnection) {Priority = ThreadPriority.Highest};
_wifiConnectThread.Start();
*/
}
}
Hi all
I am trying to precisely understand how the stack works and to be honest my opinion is that it is a bit messy. I don’t understand the opened property.
After instantiating the ethernet built in I check if it is opened and it returns false. So far so good.
Then I claim for an Ip address to the dhcp by enabling it
if (!netif.IsDhcpEnabled)
netif.EnableDhcp();
I am surprising to see dhcp transaction on wireshark while the interface is still supposed to be closed…
I tested your code and it is working properly. But as soon as I insert your code in my entire application events are not fired…
:’(
I moved the code at the beginning of main function and now I get the following exception :
Edit I only had this exception one time.
Now there’s no exception but event are not fired if I connect or disconnect the cable :wall:
I am going on investigating… It seems that the bug is related with Usb host instanciation
It seems that when I call the Start method of the controller it stops firing ethernet events.
This occurs only if a Memory Key is inserted. If the memory key is not present the events are fired properly.
@ leforban - Could you create a small program then with USB host that shows the issue for us to look into?
Hi John I finally succeed to have something working. I think that this was due to a bad sync of the autoreset event or the sleep(-1) in usb sample.
I recode this part in the entire application and will let you know.