[sane-devel] How to scan via WiFi over a LAN

Media Mouth communque at gmail.com
Sat May 8 21:08:04 BST 2021



> On May 8, 2021, at 12:55 PM, Ralph Little <skelband at gmail.com> wrote:
> 
> On the client, if the net backend has access to the server then you should be able to just do scanimage -L
> 
> If you are not sure if it is contacting the server, you can generate net backend diag to see what it is doing:
> 
> SANE_DEBUG_NET=10 scanimage -L

Ok that's brilliant, and indeed it did look look for the scanner on the remote machine, but got "access to [LAN IP] denied."
Possibly because the user on the client doesn't match the user required by the server?

[13:03:04.606515] [sanei_debug] Setting debug level of net to 10.
[13:03:04.606716] [net] sane_init: authorize != null, version_code != null
[13:03:04.606720] [net] sane_init: SANE net backend version 1.0.14 (AF-indep) from sane-backends 1.0.32
[13:03:04.606723] [net] sane_init: Client has little endian byte order
[13:03:04.606726] [net] sane_init: searching for config file
[13:03:04.606782] [net] sane_init: trying to add 192.168.0.15
[13:03:04.606787] [net] add_device: adding backend 192.168.0.15
[13:03:04.611399] [net] add_device: backend 192.168.0.15 added
[13:03:04.611415] [net] sane_init: done reading config
[13:03:04.611419] [net] sane_init: evaluating environment variable SANE_NET_HOSTS
[13:03:04.611425] [net] sane_init: evaluating environment variable SANE_NET_TIMEOUT
[13:03:04.611428] [net] sane_init: done
[13:03:04.611431] [net] sane_get_devices: local_only = 0
[13:03:04.611437] [net] connect_dev: trying to connect to 192.168.0.15
[13:03:04.663809] [net] connect_dev: [0] connection succeeded (IPv4)
[13:03:04.663837] [net] connect_dev: sanei_w_init
[13:03:04.664008] [net] connect_dev: net_init (user=ScanClient, local version=1.0.3)
[13:03:54.809164] [net] connect_dev: freeing init reply (status=Unknown SANE status code 796226418, remote version=47.115.25193)
[13:03:54.809376] [net] connect_dev: access to 192.168.0.15 denied
[13:03:54.809391] [net] connect_dev: closing connection to 192.168.0.15
[13:03:54.809433] [net] sane_get_devices: ignoring failure to connect to 192.168.0.15
[13:03:54.809448] [net] sane_get_devices: finished (0 devices)

No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).



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