Re: Problems connecting to Canon Powershot G9X using PTPIP

On Sun, May 21, 2017 at 08:07:44PM +0200, Michael Schaffner wrote:
> Hi,
> 
> i am trying to use my Canon Powershot G9 X with gphoto2.
> Using USB everything works (using digikam in debian stretch).
> Using PTPIP there is no success so far (after reading lots of blog
> posts,mailing list posts and so on).
> 
> I connected the camera successfully using the original canon software
> and captured the initial Handshake using Wireshark/libpcap on a Windows
> 10 machine.
> 
> When filtering the captured packets for ptpip, the first lines i got were:
> Init Command Request GUID: 0000000000000000ffff821934822fef Name: AEBOOK
> Init Command Ack Connection #:23213 GUID:
> 372671113c97074fb908945be4dfa273 Name: Canon PowerShot G9 X
> 
> So i put the line
> ptp2_ip=guid=00:00:00:00:00:00:00:00:ff:ff:82:19:34:82:2f:ef
> in ~/.gphoto2/settings.
> 
> Being still not successful i used
> env LANG=C gphoto2 --debug --debug-logfile=my-logfile.txt --port
> ptpip:192.168.10.211 --camera "PTP/IP Camera" -L
> to get a logfile. Here is the relevant (imho) part:
> 
> 0.099013 ptp_ptpip_init_command_request(3): ptpip/init_cmd data:
> (hexdump of 42 bytes)
> 0000  2a 00 00 00 01 00 00 00-00 00 00 00 00 00 00 00  *...............
> 0010  ff ff 82 19 34 82 2f ef-41 00 45 00 42 00 4f 00  ....4./.A.E.B.O.
> 0020  4f 00 4b 00 00 00 00 00-01 00                    O.K.......
> 
> 0.099136 ptp_ptpip_init_command_request [ptpip.c:473](0): return 42 / len 42
> 0.101962 ptp_ptpip_generic_read      (3): ptpip/generic_read header:
> (hexdump of 8 bytes)
> 0000  0c 00 00 00 05 00 00 00-                         ........
> 
> 0.101994 ptp_ptpip_generic_read      (3): ptpip/generic_read data:
> (hexdump of 4 bytes)
> 0000  01 00 00 00            -                         ....
> 
> 0.102004 ptp_ptpip_init_command_ack [ptpip.c:498](0): bad type returned 5
> 0.102056 camera_init [library.c:7678](0): Failed to connect.
> 0.102065 gp_port_close               (2): Closing port...
> 0.102423 gp_context_error            (0): An error occurred in the
> io-library ('Unspecified error'): No error description available
> 0.103179 gp_camera_free              (2): Freeing camera...
> 0.103199 gp_port_free                (2): Freeing port...
> 0.103206 gp_port_close               (2): Closing port...
> 0.103251 gp_filesystem_reset         (2): resetting filesystem
> 0.103259 gp_filesystem_lru_clear     (2): Clearing fscache LRU list...
> 0.103265 gp_filesystem_lru_clear     (2): fscache LRU list already empty
> 0.103271 delete_all_folders          (2): Internally deleting all
> folders from '/'...
> 0.103277 lookup_folder               (2): Lookup folder '/'...
> 0.103284 lookup_folder               (2): Found! / is 0x5556a2498420
> 0.103290 recurse_delete_folder       (2): Recurse delete folder
> 0x5556a2498420//
> 
> The error "bad type returned 5" is still the same as in my first tests
> without any capturing/messing with GUIDs, etc.
> As im not really understanding whats going on here i even tried to use
> both GUIDs from the Capture - in desperation i even patched libgphoto2
> to hardcode the hostname to AEBOOK (which is the name of the Windows
> machine i used for testing) just in case :-).
> 
> Still no luck.
> 
> Has anybody succesfully connected a G9X (or another newer Canon Camera)
> using PTPIP and libgphoto2 or are some of the above steps terribly wrong?

type 5 is INIT_FAILED, so something was amiss. It would be the GUID usually
and it is weird that its the same as windows uses :( That really should work.

What is the full packet content in hex from windows?

The hostname should not really matter though.

Ciao, Marcus

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