catt scan unable to find devices about catt

[diimpp]

@xiota as far as I understand my issue is not related to connectivity, I can cast from chrome and the same time catt fails to find devices, catt has never worked for me even once in my current setup. If anything, it has something to do with samsung tv device, which is too old or something like that.

[diimpp]

Tv has several ports open

$ nmap 192.168.1.2
Starting Nmap 7.80 ( https://nmap.org ) at 2022-12-11 22:40 +04
Nmap scan report for 192.168.1.2
Host is up (0.0088s latency).
Not shown: 996 closed ports
PORT     STATE SERVICE
8001/tcp open  vcom-tunnel
8002/tcp open  teradataordbms
8080/tcp open  http-proxy
9080/tcp open  glrpc

Nmap done: 1 IP address (1 host up) scanned in 0.23 seconds

What's my next step? How do I debug this?

[diimpp]

$ python3.10 -m netdisco
Discovered devices:
Discovered 0 devices

$ catt -d 192.168.1.2 scan
Scanning Chromecasts...
Error: No devices found.

$ catt -d 192.168.1.2 cast  https://www.youtube.com/watch\?v\=dQw4w9WgXcQ
Error: No device found at 192.168.1.2.

[sbradnick]

If you have one running, have you tried disabling a firewall on the host to ensure it isn't possibly blocking? I use firewalld in openSUSE and I have to allow some inbound ports for it all to work.

rule family="ipv4" source mac="<some chromecast dev mac addr>" port port="32768-60999" protocol="tcp" accept
rule family="ipv4" source mac="<some other chromecast mac addr>" port port="32768-60999" protocol="tcp" accept
rule family="ipv4" destination address="224.0.0.0/24" protocol value="udp" accept

[diimpp]

@sbradnick ubuntu seems to use ufw by default and it's disabled for me. Chromium on the PC is able to find and cast to a tv, so my guess it's not a network issue.

$ sudo ufw status
Status: inactive

Is there a way to make a curl request to a TV and get info on whatever chromecast protocols available? Could it be just a older unsupported TV?

[xiota]

catt compiled from ddc5989 was previously working for me. Stopped working today. Recompiled with 82cd0fe. catt scan intermittently has different outputs:

$ catt scan
Scanning Chromecasts...
Error: No devices found.

$ catt scan
Scanning Chromecasts...
Failed to determine cast type for host <unknown> (<urlopen error [Errno 113] No route to host>) (services:{ServiceInfo(type='mdns', data='SmartTV-4K-xxxxx._googlecast._tcp.local.')})
xxx.xxx.xxx.xxx - xxxxx - Unknown manufacturer SmartTV 4K

$ catt scan
Scanning Chromecasts...
xxx.xxx.xxx.xxx - xxxxx - Hisense SmartTV 4K

After power cycling the device (hold down the power button), catt now seems to be working again. Scanning consistently finds the device.

[skorokithakis]

Seems like a problem with the device, if power-cycling fixes it...

[xiota]

@skorokithakis Probably. Mentioned it so @diimpp and others who have connection problems can try ruling out glitches on the device itself. They're perpetually put in and out of sleep mode, and it seems a good ol' fashioned reboot is occasionally required.

Also, the error message Failed to determine cast type for host may indicate where to look for other problems.

[JrdnRgrs]

I am having similar issues as well. Here are some details about mine, i am running W11 for clarity.

I can run catt scan from my powershell console just fine, but when running in WSL or a docker container (with the net=host option) I just get Error: No devices found.. What is interesting though is that when I run the above mentioned curl command from WSL or the docker container, I can retrieve information about the device, so I know it is at least reachable...

What is very odd to me though is that when I first started trying to use catt, about a day or 2 ago, I had no issues running it in WSL or a docker container.

As far as I'm aware I did not update any local network settings, and havent changed anything at all within docker or WSL... so really not sure what is now causing me to not be able to scan for devices...

[ubeaut]

Hi I am using version 0.12.10 and the scan sometimes doesn't show but after a minute or so it works again. It is very hit and miss.
Is there a command I can use to restart the catt process so it works consistently?
Other than that when it does work it works well.