[sane-devel] saned issues for remote scanner access

[Jim George]

Hi Julien and all,
>
> Jim, is the error 100% reproducible ? If yes, could you add the
> following lines in saned.c, decode_handle(), between lines 459 and 460?
>

Yes the error is 100% reproducible when saned is access from a remote host
(it works fine when saned is accessed locally).

Did you see my note to Henning about the debug output from the gt68xx
backend?  It showed 'local_only = true' just before failing, when accessed
remotely.  Is this relevant?

I put the following in as requested.

> DBG (DBG_ERR, "decode_handle: w->status: %d, h: %d, num_handles: %d,
> inuse: %d\n",
>      w->status, h, num_handles, handle[h].inuse);
>

Here's the output.

[saned] check_host: config file line: `# SANE devices. IPv6 addresses must
be enclosed in brackets,  and  should'
[saned] check_host: config file line: `# 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: subnet with base IP = 192.168.0.1, CIDR netmask = 29
[saned] check_host: config file line: `+'
[saned] check_host: access granted from any host (`+')
[saned] init: access granted
[saned] init: access granted to jgeorge@::ffff:192.168.0.16
[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: (open) strlen(resource) == 0
[saned] process_request: access to resource `gt68xx' granted
[saned] process_request: waiting for request
[saned] process_request: got request 8

Program received signal SIGSEGV, Segmentation fault.
0x08049d3e in decode_handle (w=0x8053460, op=0x804f370 "cancel") at
saned.c:460
460       DBG (DBG_ERR, "decode_handle: w->status: %d, h: %d, num_handles:
%d, inuse: %d\n",
(gdb) bt
#0  0x08049d3e in decode_handle (w=0x8053460, op=0x804f370 "cancel") at
saned.c:460
#1  0x0804bb76 in process_request (w=0x8053460) at saned.c:2005
#2  0x0804bcf2 in main (argc=2, argv=0xbffff5d4) at saned.c:2278
#3  0x4009e4c2 in __libc_start_main () from /lib/i686/libc.so.6

Cheers,

Jim