connection with ipad to some mac osx do not work

[mbonani]

at least two user cannot connect scratch with ipad to a osx machine, it seems it works on Mojave but not on Catalina. Thymio Suite on ipad see the master computer;Thymio are correctly listed on the ipad but then the connection to scratch is not working (orange dot). Same tablet connecting to a windows host works fine.
Is there a hidden firewall? something else?

[mbonani]

I can reproduce on my local mac Mojave 10.14.4
what is strange I do see the thymio from the ipad but not from my windows desktop, but I am sure it as worked

[mbonani]

setup: one macosx 10.14.4 on windows 10 and ipad on same access point. Each computer as a simulator with 4 robots
ipad see both but scratch connection do only work on windows
mac see 8 robots and can connect to all with scratch
windows see only his 4 robots

is there a problem with bonjour? my bonjour browser on windows do not see the mac,

[mbonani]

I do a similar test with another mac on High Sierra 10.13 same behavior on the same access point
but putting both computer on another access point windows to macs was working. Perhaps a problem with ipv6 ?

[mbonani]

I will put some testing infomation to surround the problem:
test case 1 ipad 1 mac osx 10.14.4 (Firewall disabled) 1 PC running windows (firewall enable but Thymio Suite/TDM allowed for local connection) Netgear access point (I will dig in parameter if needet)
What is working:

• mac see and connect to all robot using scratch
• ipad see and connect to all robot (also mac this time, but it is not always the case)
• on window only window robot are shown and are connectable

Discovery Bonjour scanner:

just append writing this post, simulator on mac has this error:

and robot are no more available on mac and on network
no more robot on ipad (even windows one)
windows robot can be seens and connect on mac and window

[mbonani]

relaunching the simulator make it works again also to connect on robot that are onthe mac

[mbonani]

relanching Thymio Suite on the windows make all work fine again (expeted windows do no see macs robot, but ipad yes)

[mbonani]

putin playgound on back make it the disconnection error probably the power saving mecanism of the mac

[mbonani]

this make the bonjour service also not working for the windows, so for me asebaplayground on mac OSX make strange thing on Bonjour

[mbonani]

setup changes now all on another access point gl inet:
all is working fine, after some strange behaviour but I think Bonjour was not totally correct without restarting Thymio Suite on both computers
windows can see mac and connect to robots
ipad work fine on all robot

[mbonani]

bonjour on win see the mac with this access point but info are not there

[mbonani]

[mbonani]

playground still make this disconnection problem when it is put in background

[mbonani]

back on the netgear access point (was shut down) all seems to work again... winodows see everything

[mbonani]

I confirm that the IP address is not passed by Thymio Suite to the browser, it seem that the Bonjour service is not totatlly discribe:

[mbonani]

is there some asio initialisation to be fix due to new version https://www.boost.org/doc/libs/1_72_0/doc/html/boost_asio/history.html?

[mbonani]

is there something that is fix in https://www.boost.org/doc/libs/1_73_0/doc/html/boost_asio/history.html ?

[mbonani]

back from lunch connection with scratch from computer or ipad do not work, it work with studio or VPL, is there something wrong with this connection link?
file:///C:/Program%20Files/Thymio/scratch/index.html?device=%7B43b62dfe-7796-41d4-a2d1-980d5aa2417b%7D&ws=

[mbonani]

ok If I correct Ip by hand on address bar adding IP from mac it works! file:///C:/Program%20Files/Thymio/scratch/index.html?device=%7B43b62dfe-7796-41d4-a2d1-980d5aa2417b%7D&ws=ws://192.168.1.3:8597

[mbonani]

if confirm this test case same result as explain upside
on thing strange is that also locally ws-port is not shown with discovery

[mbonani]

exactly same behavior (not working) this time with second router that was working before
similar decription failure of service of Bonjour of the Mac

[mbonani]

I did not get it work again...

[mbonani]

for me the Bonjour service or mDNS is not working properly on this mac (or only TDM do not describe itself corretly)

[mbonani]

I made some test also with a build with boost 1.73
no miracle bug is still there. This time it is a old 10.12.6.
I launch several time Thymio suite and look with Discovery the Bonjour description, half of the time the ws port is missing that makes then remot access not work for webbase connection

so we should focus to understand this description why is sometime not complete (race condition?)

[mbonani]

boostorg/asio#110 evaluate this?

[mbonani]

probably related on this part of code:
9641614

[mbonani]

fastest path to see if bug is reproduce:

• launch Discovery: https://apps.apple.com/ch/app/discovery-dns-sd-browser/id305441017?l=fr
• launch Thymio Suite
• launch a simulator
• look in Discovery if ws-port=8597 is there (good) or not (bad)
• just relaunch several time Thymio Suite (let the simulator run is ok) to see result on Discovery

[mbonani]

code related:

aseba/aseba/thymio-device-manager/aseba_node_registery.h

Line 72 in aee313f

// Endpoint of the WebSocket - So we can expose the port on zeroconf

aseba/aseba/thymio-device-manager/main.cpp

Line 66 in aee313f

node_registery.set_ws_endpoint(websocket_server.endpoint());

[mbonani]

I found that when discovery do not shows correctly ws port we have a correct error message in thymio-device-manager log:

[2020-10-12 10:52:14.125] [console] [trace] aseba_node_registery@L138:	Discovery : update complete
[2020-10-12 10:52:14.125] [console] [error] aseba_node_registery@L136:	Discovery : already registered