[sane-devel] Running sane din docker

Sun Jul 30 19:32:34 UTC 2017

On Sun, 30 Jul 2017, at 06:31, Olaf Meeuwissen wrote:
> Hi Jan,
> 
> Jan De Luyck writes:
> 
> > Ah. I'm running saned in a container, which runs on the host which has
> > the usb scanner plugged in. I want to share that scanner over the
> > network to other machines.
> 
> # For folks more familiar with VMs, it's like making the USB devices
> # from the host OS visible to the guest OS and then use saned from the
> # guest OS to expose a host OS connected USB scanner.
> 
> Can I have a look at your Dockerfile?  What docker command-line
> invocation (or what docker-compose.yml) do you use?

Sure. I've got everything up on https://github.com/jdeluyck/docker-saned

> 
> Can you scan via the USB interface from within the container as well as
> from outside of the container?  If that works, the problem is with the
> networking part.
> 
> Can you scan via saned from *within* the container?  Obviously, from
> outside the container doesn't work otherwise you wouldn't have asked
> here ;-)

I've tested with scanimage:

# scanimage -T
scanimage: scanning image of size 638x877 pixels at 24 bits/pixel
scanimage: acquiring RGB frame, 8 bits/sample
scanimage: reading one scanline, 1914 bytes...  PASS
scanimage: reading one byte...          PASS
scanimage: stepped read, 2 bytes...     PASS
scanimage: stepped read, 4 bytes...     PASS
scanimage: stepped read, 8 bytes...     PASS
scanimage: stepped read, 16 bytes...    PASS
scanimage: stepped read, 32 bytes...    PASS
scanimage: stepped read, 64 bytes...    PASS
scanimage: stepped read, 128 bytes...   PASS
scanimage: stepped read, 256 bytes...   PASS
scanimage: stepped read, 512 bytes...   PASS
scanimage: stepped read, 1024 bytes...  PASS
scanimage: stepped read, 2048 bytes...  PASS
scanimage: stepped read, 2047 bytes...  PASS
scanimage: stepped read, 1023 bytes...  PASS
scanimage: stepped read, 511 bytes...   PASS
scanimage: stepped read, 255 bytes...   PASS
scanimage: stepped read, 127 bytes...   PASS
scanimage: stepped read, 63 bytes...    PASS
scanimage: stepped read, 31 bytes...    PASS
scanimage: stepped read, 15 bytes...    PASS
scanimage: stepped read, 7 bytes...     PASS
scanimage: stepped read, 3 bytes...     PASS

- which I would say looks good. This is running from inside the
container.

> 
> > The scanner is a HP PSC 1200, supported through hpaio (and works great).
> >
> > Hpaio backend is version 3.16.11.
> > Sane is version 1.0.25
> >> >
> >> > I'm currently trying to get Sane to run inside a docker container.
> >> > Reasons being that I can't modify the OS of the underlying machine, but
> >> > I can play with docker containers.
> >> >
> >> > By sharing the /dev/bus/usb filesystem to the container, and mapping the
> >> > necessary ports, I've gotten it to run (using runit to keep the services
> >> > up and running). The scanner is detected, and I can start a remote scan
> >> > - unfortunately it never completes, it fails shortly in the scan with a
> >> > SIGPIPE error, and the client app (being scanimage or xsane) bombs out.
> >> >
> >> > The docker container is based on Debian Stable, I have dbus running
> >> > inside it and ahavi is available.
> 
> IIUC, you shouldn't need either.  Not for a USB scanner exposed via
> saned.

Oh. OK. That greatly reduces my dependencies.

> 
> >> > Running scanimage -T returns:
> >> > $ scanimage -T
> >> > scanimage: scanning image of size 638x877 pixels at 24 bits/pixel
> >> > scanimage: acquiring RGB frame, 8 bits/sample
> >> > scanimage: reading one scanline, 1914 bytes...  FAIL No data
> 
> No data?  Right from the start ...
> 
> >> > [...]
> >> > scanimage: stepped read, 3 bytes...     FAIL No data
> >> > scanimage: received signal 13
> >> > scanimage: trying to stop scanner
> >> > Segmentation fault
> >> >
> >> > The last messages I get from saned -d128 are:
> >> >
> >> > [saned] do_scan: trying to write 8192 bytes to client
> >> > [saned] quit: received signal 13
> 
> Given that you get No data from the start, there may be something more
> interesting earlier in the log.

This is the full dump:

# saned -d 128
[saned] main: starting debug mode (level 128)
[saned] read_config: searching for config file
[saned] read_config: data port range: 10000 - 10001
[saned] read_config: done reading config
[saned] saned (AF-indep+IPv6) from sane-backends 1.0.25 starting up
[saned] do_bindings: trying to get port for service "sane-port"
(getaddrinfo)
[saned] do_bindings: [1] socket () using IPv6
[saned] do_bindings: [1] setsockopt ()
[saned] do_bindings: [1] bind () to port 6566
[saned] do_bindings: [1] listen ()
[saned] do_bindings: [0] socket () using IPv4
[saned] do_bindings: [0] setsockopt ()
[saned] do_bindings: [0] bind () to port 6566
[saned] do_bindings: [0] bind failed: Address already in use
[saned] run_standalone: spawning Avahi process
[saned] run_standalone: waiting for control connection
[saned] saned_avahi_callback: AVAHI_CLIENT_CONNECTING
[saned] handle_connection: processing client connection
[saned] check_host: detected an IPv4-mapped address
[saned] check_host: access by remote host: ::ffff:172.17.0.1
[saned] check_host: remote host is not IN_LOOPBACK nor IN6_LOOPBACK
[saned] check_host: local hostname: fdb8cf4e1d9f
[saned] check_host: local hostname(s) (from DNS): fdb8cf4e1d9f
[saned] check_host: local hostname(s) (from DNS): (null)
[saned] check_host: local hostname(s) (from DNS): (null)
[saned] check_host: remote host doesn't have same addr as local
[saned] check_host: opening config file: /etc/hosts.equiv
[saned] check_host: can't open config file: /etc/hosts.equiv (No such
file or directory)
[saned] check_host: opening config file: saned.conf
[saned] check_host: config file line: `# saned.conf'
[saned] check_host: config file line: `# Configuration for the saned
daemon'
[saned] check_host: config file line: `'
[saned] check_host: config file line: `## Daemon options'
[saned] check_host: config file line: `# Port range for the data
connection. Choose a range inside [1024 - 65535].'
[saned] check_host: config file line: `# Avoid specifying too large a
range, for performance reasons.'
[saned] check_host: config file line: `#'
[saned] check_host: config file line: `# ONLY use this if your saned
server is sitting behind a firewall. If your'
[saned] check_host: config file line: `# firewall is a Linux machine, we
strongly recommend using the'
[saned] check_host: config file line: `# Netfilter nf_conntrack_sane
connection tracking module instead.'
[saned] check_host: config file line: `#'
[saned] check_host: config file line: `data_portrange = 10000 - 10001'
[saned] check_host: config file line: `'
[saned] check_host: config file line: `'
[saned] check_host: config file line: `## Access list'
[saned] check_host: config file line: `# A list of host names, IP
addresses or IP subnets (CIDR notation) that'
[saned] check_host: config file line: `# are permitted to use local SANE
devices. IPv6 addresses must be enclosed'
[saned] check_host: config file line: `# in brackets, and should always
be specified in their compressed form.'
[saned] check_host: config file line: `#'
[saned] check_host: config file line: `# The hostname matching is not
case-sensitive.'
[saned] check_host: config file line: `'
[saned] check_host: config file line: `#scan-client.somedomain.firm'
[saned] check_host: config file line: `#192.168.0.1'
[saned] check_host: config file line: `#192.168.0.1/29'
[saned] check_host: config file line: `#[2001:db8:185e::42:12]'
[saned] check_host: config file line: `#[2001:db8:185e::42:12]/64'
[saned] check_host: config file line: `'
[saned] check_host: config file line: `# NOTE: /etc/inetd.conf (or
/etc/xinetd.conf) and'
[saned] check_host: config file line: `# /etc/services must also be
properly configured to start'
[saned] check_host: config file line: `# the saned daemon as documented
in saned(8), services(4)'
[saned] check_host: config file line: `# and inetd.conf(4) (or
xinetd.conf(5)).'
[saned] check_host: config file line: `localhost'
[saned] check_host: DNS lookup returns IP address: ::1
[saned] check_host: DNS lookup returns IP address: ::1
[saned] check_host: DNS lookup returns IP address: ::1
[saned] check_host: DNS lookup returns IP address: 127.0.0.1
[saned] check_host: DNS lookup returns IP address: 127.0.0.1
[saned] check_host: DNS lookup returns IP address: 127.0.0.1
[saned] check_host: config file line: `0.0.0/0'
[saned] check_host: subnet with base IP = 0.0.0, CIDR netmask = 0
[saned] check_host: access granted from IP address 172.17.0.1 (in subnet
0.0.0/0)
[saned] init: access granted
[saned] init: access granted to user@::ffff:172.17.0.1
[saned] process_request: waiting for request
[saned] process_request: got request 1
[saned] process_request: waiting for request
[saned] process_request: got request 2
[saned] process_request: access to resource `hpaio' granted
[saned] process_request: sane_open returned: Success
[saned] process_request: waiting for request
[saned] process_request: got request 4
[saned] process_request: waiting for request
[saned] process_request: got request 5
[saned] process_request: waiting for request
[saned] process_request: got request 5
[saned] process_request: waiting for request
[saned] process_request: got request 5
[saned] process_request: waiting for request
[saned] process_request: got request 5
[saned] process_request: waiting for request
[saned] process_request: got request 5
[saned] process_request: waiting for request
[saned] process_request: got request 5
[saned] process_request: waiting for request
[saned] process_request: got request 5
[saned] process_request: waiting for request
[saned] process_request: got request 5
[saned] process_request: waiting for request
[saned] process_request: got request 5
[saned] process_request: waiting for request
[saned] process_request: got request 5
[saned] process_request: waiting for request
[saned] process_request: got request 7
[saned] start_scan: trying to bind data port 10000
[saned] start_scan: using port 10000 for data
[saned] process_request: waiting for data connection
[saned] process_request: access to data port from ::ffff:172.17.0.1
[saned] do_scan: start
[saned] do_scan: trying to read 8188 bytes from scanner
[saned] do_scan: read 8188 bytes from scanner
[saned] do_scan: processing RPC request on fd 4
[saned] process_request: waiting for request
[saned] process_request: got request 6
[saned] do_scan: trying to write 8192 bytes to client
[saned] do_scan: wrote 8192 bytes to client
[saned] do_scan: trying to read 8188 bytes from scanner
[saned] do_scan: read 8188 bytes from scanner
[saned] do_scan: trying to write 8192 bytes to client
[saned] quit: received signal 13
[saned] quit: exiting
#

Kind regards,

Jan