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sailoog / openplotter

Obsolete project. New one and active: https://github.com/openplotter
http://www.sailoog.com/openplotter
GNU General Public License v2.0
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Unable to access to internet with USB Wifi dongle randomly #232

Open pkernevez opened 5 years ago

pkernevez commented 5 years ago

Hi all,

I have a Wifi USB dongle. During the first boots I don't have issues, I was able to connect to internet and update openplotter. But now I lost the capacity to connect to internet. This is due to the definition of 2 default IP routes. Now the interface that win is not the internet interface.

My model : Raspberry Pi 3 Model B Rev 1.2 My configuration: wlan 0 : my dongle wlan 1 : board Wifi Openplotter : 1.2.0 alpha

My Wifi configuration :

image

My routes just after the boot:

$ ip route show
default via 10.10.10.1 dev wlan1 src 10.10.10.1 metric 303
default via 192.168.1.1 dev wlan0 src 192.168.1.131 metric 304
10.10.10.0/24 dev wlan1 proto kernel scope link src 10.10.10.1 metric 303
192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.131 metric 304

My pb and the solution:

pi@openplotter:~ $ ping google.com
ping: google.com: Temporary failure in name resolution
pi@openplotter:~ $ sudo ip route delete default via 10.10.10.1 dev wlan1 src 10.10.10.1
pi@openplotter:~ $ ping google.com
PING google.com (216.58.215.238) 56(84) bytes of data.
64 bytes from zrh11s02-in-f14.1e100.net (216.58.215.238): icmp_seq=1 ttl=53 time=15.6 ms
64 bytes from zrh11s02-in-f14.1e100.net (216.58.215.238): icmp_seq=2 ttl=53 time=21.7 ms

I don't know why with the configuration : AP + Client the access point has a default route.

Thank to the team for this beautiful tool ! Philippe

pkernevez commented 5 years ago

I there a public forum somewhere to ask for question before creating an issue ?

richardmbell commented 5 years ago

Absolutely! We are at forum.OpenMarine.net

Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message -------- From: Kernevez notifications@github.com Date: 1/16/19 16:01 (GMT-05:00) To: sailoog/openplotter openplotter@noreply.github.com Cc: Subscribed subscribed@noreply.github.com Subject: Re: [sailoog/openplotter] Unable to access to internet with USB Wifi dongle randomly (#232)

I there a public forum somewhere to ask for question before creating an issue ?

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pkernevez commented 5 years ago

After some new tests. It seems that the default routes are applied in a random order. Half of the time the first default route is the route of the AP (wlan1) instead the internet client (wlan0). An idea of the root cause ?

FredericGuilbault commented 5 years ago

Udev node attribution is first up first attributed. Relying on wlanX is not a stable way to do it.

Writing udev rules that use manifacturer+ model version or MAC address would be the proper way fingerprint your devices.

This said, IDK how openplotter do it. It's just my 2 cents on the topic.