arv_camera_new / arv_open_device doesn't work with IP on LLA

[hackel6]

Describe the bug
Using the camera's IP address when it's assigned to Link Local Address (LLA - 169.254.112.30), like most cameras are out of the box, does not work with arv_camera_new (or, down the callstack with arv_open_device). It DOES, however, work with the camera name, or even the wildcard '*' when it is the only camera connected.

To Reproduce
Steps to reproduce the behavior:

 # ifconfig eth1 | grep inet
        inet 192.168.1.1  netmask 255.255.255.0  broadcast 192.168.1.255
 # ./arv-tool-0.8
FLIR-Blackfly S BFS-PGE-244S8M-XXXXXXXX (169.254.112.30)
 # ./arv-tool-0.8 -a "169.254.112.30"
Can't connect to device at address '169.254.112.30'
 # ./arv-tool-0.8 -n "FLIR-Blackfly S BFS-PGE-244S8M-XXXXXXXX"
FLIR-Blackfly S BFS-PGE-244S8M-25501295

Expected behavior
Expected:

# ./arv-tool-0.8 -a "169.254.112.30"
FLIR-Blackfly S BFS-PGE-244S8M-XXXXXXXX
# ./arv-tool-0.8 -n "169.254.112.30"
FLIR-Blackfly S BFS-PGE-244S8M-XXXXXXXX

Camera description:

• Manufacturer: FLIR
• Model: Blackfly S BFS-PGE-244S8M-25501295
• Interface: GigE
  But it is the same behavior with all GigE cameras I've tried.

Platform description:

• Aravis version: 0.8.35
• OS: Gentoo Linux 4.14.178-gentoo #17 SMP
• Hardware: x86_64

[EmmanuelP]

Hi. Thanks for the report.

Could you attach the output of ./arv-tool-0.8 -a "169.254.112.30" -d all:3 ?

[hackel6]

>./arv-tool-0.8 -a "169.254.112.30" -d all:3
[10:01:46.858] 🅸 interface> [GvDiscoverSocket::new] Add interface 127.0.0.1 (127.0.0.1)
[10:01:46.858] 🅸 interface> [GvDiscoverSocket::new] Add interface xxx.xxx.1.104 (xxx.xxx.255.255)
[10:01:46.859] 🅸 interface> [GvDiscoverSocket::new] Add interface 192.168.1.1 (192.168.1.255)
[10:01:46.859] 🆆 interface> [ArvGVInterface::arv_gv_interface_camera_locate] Error: Error sending message: Invalid argument
Can't connect to device at address '169.254.112.30'

[EmmanuelP]

And ./arv-tool-0.8 -n "FLIR-Blackfly S BFS-PGE-244S8M-XXXXXXXX" -d all:3 ?

[EmmanuelP]

I can not reproduce what you are seeing. On my laptop, by default I can not see a camera in LLA mode connected directly. This is consistent with Basler Pylon implementation. Baumer Gapi discovers the camera, but can not open it.

If I enable ipv4 link local on my interface, I can discover and open the camera with the 3 implementations, either using the camera name or its IP address. Enabling LLA is done with this command:

nmcli connection modify "Connexion filaire" ipv4.method auto ipv4.link-local enabled

When enabled, an interface in the local link range is available:

[09:59:08.928] 🅸 interface> [GvDiscoverSocket::new] Add interface 127.0.0.1 (127.0.0.1)
[09:59:08.928] 🅸 interface> [GvDiscoverSocket::new] Add interface 192.168.122.1 (192.168.122.255)
[09:59:08.928] 🅸 interface> [GvDiscoverSocket::new] Add interface 169.254.223.239 (169.254.255.255)
[09:59:08.928] 🅸 interface> [GvDiscoverSocket::new] Add interface 192.168.0.114 (192.168.0.255)

Given aravis is consistent with pylon, and gapi just discover the camera but can not open it if LLA is not enabled on the interface, I would say it is more a network configuration issue than an aravis one.

[hackel6]

I guess the crux of my issue is the difference between using the IP address or the device name (or even the wildcard *) in arv_camera_new() when the device is configured for DHCP/LLA.

 ~ # ./arv-tool-0.8 -a "169.254.112.30" -d all:3
[09:48:47.699] 🅸 interface> [GvDiscoverSocket::new] Add interface 127.0.0.1 (127.0.0.1)
[09:48:47.699] 🅸 interface> [GvDiscoverSocket::new] Add interface xxx.xxx.1.104 (xxx.xxx.255.255)
[09:48:47.699] 🅸 interface> [GvDiscoverSocket::new] Add interface 192.168.1.1 (192.168.1.255)
[09:48:47.699] 🆆 interface> [ArvGVInterface::arv_gv_interface_camera_locate] Error: Error sending message: Invalid argument
Can't connect to device at address '169.254.112.30'
 ~ # ./arv-tool-0.8 -n "FLIR-Blackfly S BFS-PGE-244S8M-xxxxxxxx" -d all:3
[09:48:56.140] 🅸 interface> [GvDiscoverSocket::new] Add interface 127.0.0.1 (127.0.0.1)
[09:48:56.140] 🅸 interface> [GvDiscoverSocket::new] Add interface xxx.xxx.1.104 (xxx.xxx.255.255)
[09:48:56.140] 🅸 interface> [GvDiscoverSocket::new] Add interface 192.168.1.1 (192.168.1.255)
[09:48:56.143] 🅳 cp> packet_type  = ack
                     command      = discovery-ack
                     size         = 248
                     id           = 65535
                     manufacturer = FLIR
                     name         =
                     model        = Blackfly S BFS-PGE-244S8M
                     address      = 169.254.112.30
                     00000000 00 00 00 03 00 f8 ff ff 00 01 00 02 80 00 00 01  ................
                     00000010 00 00 2c dd a3 85 1e 6f 00 00 00 07 00 00 00 06  ..,....o........
                     00000020 00 00 00 00 00 00 00 00 00 00 00 00 a9 fe 70 1e  ..............p.
                     00000030 00 00 00 00 00 00 00 00 00 00 00 00 ff ff 00 00  ................
                     00000040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
                     00000050 46 4c 49 52 00 00 00 00 00 00 00 00 00 00 00 00  FLIR............
                     00000060 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
                     00000070 42 6c 61 63 6b 66 6c 79 20 53 20 42 46 53 2d 50  Blackfly S BFS-P
                     00000080 47 45 2d 32 34 34 53 38 4d 00 00 00 00 00 00 00  GE-244S8M.......
                     00000090 32 31 30 37 2e 30 2e 33 31 31 2e 30 00 00 00 00  2107.0.311.0....
                     000000a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
                     000000b0 4a 75 6c 20 32 33 20 32 30 32 31 20 30 39 3a 33  Jul 23 2021 09:3
                     000000c0 38 3a 35 31 00 00 00 00 00 00 00 00 00 00 00 00  8:51............
                     000000d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
                     000000e0 32 35 35 30 31 32 39 35 00 00 00 00 00 00 00 00  xxxxxxxx........
                     000000f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[09:48:56.143] 🅸 interface> [GvInterface::discovery] Device 'FLIR-Blackfly S BFS-PGE-244S8M-xxxxxxxx' found (interface 192.168.1.1) user_id '' - MAC 'XX:XX:XX:XX:XX:XX'
[09:48:56.143] 🅸 device> [GvDevice::new] Interface address = 192.168.1.1
[09:48:56.143] 🅸 device> [GvDevice::new] Device address = 169.254.112.30
[09:48:56.644] 🆆 device> [GvDevice::read_memory] Ack reception timeout
[09:48:56.644] 🆆 device> [GvDevice::read_memory] Ack reception timeout
[09:48:57.145] 🆆 device> [GvDevice::read_memory] Ack reception timeout
[09:48:57.145] 🆆 device> [GvDevice::read_memory] Ack reception timeout
[09:48:57.646] 🆆 device> [GvDevice::read_memory] Ack reception timeout
[09:48:57.646] 🆆 device> [GvDevice::read_memory] Ack reception timeout
[09:48:58.147] 🆆 device> [GvDevice::read_memory] Ack reception timeout
[09:48:58.147] 🆆 device> [GvDevice::read_memory] Ack reception timeout
[09:48:58.648] 🆆 device> [GvDevice::read_memory] Ack reception timeout
[09:48:58.648] 🆆 device> [GvDevice::read_memory] Ack reception timeout
GigEVision read_memory timeout
 ~ # ./arv-tool-0.8 -n "*" -d all:3
[09:49:09.305] 🅸 interface> [GvDiscoverSocket::new] Add interface 127.0.0.1 (127.0.0.1)
[09:49:09.305] 🅸 interface> [GvDiscoverSocket::new] Add interface xxx.xxx.1.104 (xxx.xxx.255.255)
[09:49:09.305] 🅸 interface> [GvDiscoverSocket::new] Add interface 192.168.1.1 (192.168.1.255)
[09:49:09.308] 🅳 cp> packet_type  = ack
                     command      = discovery-ack
                     size         = 248
                     id           = 65535
                     manufacturer = FLIR
                     name         =
                     model        = Blackfly S BFS-PGE-244S8M
                     address      = 169.254.112.30
                     00000000 00 00 00 03 00 f8 ff ff 00 01 00 02 80 00 00 01  ................
                     00000010 00 00 2c dd a3 85 1e 6f 00 00 00 07 00 00 00 06  ..,....o........
                     00000020 00 00 00 00 00 00 00 00 00 00 00 00 a9 fe 70 1e  ..............p.
                     00000030 00 00 00 00 00 00 00 00 00 00 00 00 ff ff 00 00  ................
                     00000040 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
                     00000050 46 4c 49 52 00 00 00 00 00 00 00 00 00 00 00 00  FLIR............
                     00000060 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
                     00000070 42 6c 61 63 6b 66 6c 79 20 53 20 42 46 53 2d 50  Blackfly S BFS-P
                     00000080 47 45 2d 32 34 34 53 38 4d 00 00 00 00 00 00 00  GE-244S8M.......
                     00000090 32 31 30 37 2e 30 2e 33 31 31 2e 30 00 00 00 00  2107.0.311.0....
                     000000a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
                     000000b0 4a 75 6c 20 32 33 20 32 30 32 31 20 30 39 3a 33  Jul 23 2021 09:3
                     000000c0 38 3a 35 31 00 00 00 00 00 00 00 00 00 00 00 00  8:51............
                     000000d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
                     000000e0 32 35 35 30 31 32 39 35 00 00 00 00 00 00 00 00  xxxxxxxx........
                     000000f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
[09:49:09.309] 🅸 interface> [GvInterface::discovery] Device 'FLIR-Blackfly S BFS-PGE-244S8M-xxxxxxxx' found (interface 192.168.1.1) user_id '' - MAC 'XX:XX:XX:XX:XX:XX'
[09:49:10.309] 🅳 misc> Regex '^.*$' created from glob '*'
FLIR-Blackfly S BFS-PGE-244S8M-xxxxxxxx (169.254.112.30)

I am not necessary trying to CONTROL the device, but rather allow the user to set the persistent IP on a camera out of the box (usually configured with DHCP). It does not seem to work if I pass the IP address string into arv_camera_new(), but once i changed to using the device "name" (and changing nothing else), it works and i can connect to the camera and configure the IP address.

it's not really a big deal because switching my paradigm to using the device name string rather than the IP address string is all i needed to do to get it working. I was just pointing out the unexpected discrepancy between using the IP vs using the device name in arv_camera_new().

[eudoxos]

From cursory read of the issue, it seems that you don't have LLA assigned to any local interfaces. LLAs are special in the way they are assigned, but you still need a local interface within the 169.254.0.0/16 block on your machine, with corresponding netmask, otherwise the IP stack does not know how to reach your camera.