Not really an issue, but just a question. Possibly a dumb one, as I'm rather inexperienced when it comes to cryptography, certificates and signing keys. Forgive me for that in advance. I should also mention I'm playing with OpenDrop on macOS, running on top or native AWDL, no OWL involved, although I don't think it makes any difference for this particular question.

If I read correctly, what I can understand from this paper (section 3.3) and OpenDrop source file util.py, (line 94), in order to discover and send files to a device in Contacts Only mode, two certificates are needed. The first one is a device-specific Apple-signed certificate, with subject name something like com.apple.idms.appleid.prd.uuid, where uuid part is an Apple ID account UUID. The certificate is usually placed into user's login Keychain when logging into the device with its Apple ID. The whole purpose of this certificate is to get that UUID (and put it into the record data) and if one can figure out some other way of doing it (e.g. using Apple's private Sharing framework), that certificate is not needed at all.

The second certificate is used to sign binary plist data of created record data. It is said that "to be accepted by Apple clients, we would need the Apple-owned private key of the signing certificate", and of course we don't have it. When my Apple AirDrop devices in Contacts Only mode are discovered by my Mac, I assume the record data containing my Apple ID UUID and hashed contacts is somehow signed on the Mac and send to those devices when trying to establish an authenticated connection. So, if there are no Apple-owned private keys on my Mac, I wonder how that record data gets signed when the Mac initiates authenticated connection to other AirDrop device.

Once again, I apologise for potentially dumb question for the reasons I explained in the first paragraph and thanks for clarification.

I was able to receive files (although I don't know where the file was put), but opendrop won't find the same iphone when attempting to send a file.

I only get this message:

Looking for receivers. Press enter to stop ...

Hi, I've tried in multiple virtual machines with the following configuration the "receive" command with no success:

• Ubuntu 18.04, network card: Alpha AWUS052NH
• Debian 9, network card: Alpha AWUS052NH
• Kali Linux 2019, network card: Alpha AWUS052NH

In all of the environments, I've managed to set up the network with the card in monitor mode, although I have only been able to run the owl process with the -N flag sudo owl -i [iface] -N When i run the process (both with the daemon process or without it) I've been able to use the opendrop find command all the time, discovering all the devices but when i try to run opendrop receive there are some random issues:

• Most of the time it does not work, freezing and sending random zerconf mdns packets but not receiven anything.
• Sometimes it captures the devices and my iDevices display the new device created by opendrop with the given name.
• Sometimes it captures the devices but it does not appear in my iDevices.

So I don't know what to do to fix those issues. Thanks in advance.

Currently the command pip3 install opendrop shows that the package is not registered in the PIP repositories yet, therefore it is easy for someone malicious to claim the package and serve arbitrary code with it.

I suggest the maintainers of this project register it with PIP so it can be installed with above-mentioned command.

opendrop receive

Traceback (most recent call last): File "/home/santiago/.local/bin/opendrop", line 8, in sys.exit(main()) File "/home/santiago/.local/lib/python3.6/site-packages/opendrop/cli.py", line 36, in main AirDropCli(sys.argv[1:]) File "/home/santiago/.local/lib/python3.6/site-packages/opendrop/cli.py", line 75, in init self.receive() File "/home/santiago/.local/lib/python3.6/site-packages/opendrop/cli.py", line 156, in receive self.server = AirDropServer(self.config) File "/home/santiago/.local/lib/python3.6/site-packages/opendrop/server.py", line 54, in init 'Make sure that owl is running.'.format(self.config.interface)) RuntimeError: Interface awdl0 does not have an IPv6 address. Make sure that owl is running.

opendrop find Looking for receivers. Press enter to stop ... Traceback (most recent call last): File "/home/santiago/.local/bin/opendrop", line 8, in sys.exit(main()) File "/home/santiago/.local/lib/python3.6/site-packages/opendrop/cli.py", line 36, in main AirDropCli(sys.argv[1:]) File "/home/santiago/.local/lib/python3.6/site-packages/opendrop/cli.py", line 77, in init self.find() File "/home/santiago/.local/lib/python3.6/site-packages/opendrop/cli.py", line 96, in find self.browser = AirDropBrowser(self.config) File "/home/santiago/.local/lib/python3.6/site-packages/opendrop/client.py", line 44, in init 'Make sure that owl is running.'.format(config.interface)) RuntimeError: Interface awdl0 does not have an IPv6 address. Make sure that owl is running.

System information: • Operating system: MacOS Catalina 10.15.7 • Device: MacBook Pro (16-inch, 2019)

Steps to reproduce:

~ opendrop find
Looking for receivers. Press enter to stop ...
Error sending through socket 4
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/zeroconf/__init__.py", line 2889, in send
    bytes_sent = s.sendto(packet, 0, (real_addr, port))
OSError: [Errno 55] No buffer space available

~ opendrop receive
Announcing service: host 3c22fbf03a1f.ant.amazon.com, address fe80::7446:c4ff:fe51:d986, port 8771
Error sending through socket 4
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/zeroconf/__init__.py", line 2889, in send
    bytes_sent = s.sendto(packet, 0, (real_addr, port))
OSError: [Errno 55] No buffer space available
Starting HTTPS server

Expected results: Find new devices and/or receive incoming payload Actual results: Catching OSError: [Errno 55] No buffer space available errors upon execution.

Things tried:

1. Increasing datagram size:

sudo sysctl -w net.inet.udp.maxdgram=655350
net.inet.udp.maxdgram: 9216 -> 655350

No effect.

title^

debugging shows that FileIcon from this line definitely has some bytes in it, but upon receiving no preview is available, just the plain text

Expected behavior: this

Actual behavior: same but without an image

Ok great, I made the changes in my fork. I had to change the tree structure, by having an intermediary src folder, otherwise, relative imports would break.

The cfg file also has support for coverage.rc, doc8.ini files that can be used for testing with Travis

I'm working through the Use AirDrop on a Raspberry Pi 3 guide using the suggested setup:

• Raspberry Pi 3 Model B
• Raspbian Stretch Lite
• BCM43430A1 Wi-Fi chip

When attempting to send a file from the Raspberry Pi to an iPhone, the phone is prompted with the Airdrop Decline/Accept popup. After pressing Accept on the phone, an Alert pops up with the text "AirDrop from "raspberrypi" Failed" and OpenDrop throws either a [Errno 32] Broken pipe or a [Errno 104] Connection reset by peer exception.

Example stack trace of the [Errno 32] Broken pipe exception:

pi@raspberrypi:~ $ opendrop send -r 0 -f IMG_0631.jpg 
Asking receiver to accept ...
Receiver accepted
Uploading file ...
Traceback (most recent call last):
  File "/usr/local/bin/opendrop", line 11, in <module>
    load_entry_point('opendrop==0.10', 'console_scripts', 'opendrop')()
  File "/usr/local/lib/python3.5/dist-packages/opendrop/cli.py", line 38, in main
    AirDropCli(sys.argv[1:])
  File "/usr/local/lib/python3.5/dist-packages/opendrop/cli.py", line 85, in __init__
    self.send()
  File "/usr/local/lib/python3.5/dist-packages/opendrop/cli.py", line 162, in send
    if not self.client.send_upload(self.file):
  File "/usr/local/lib/python3.5/dist-packages/opendrop/client.py", line 201, in send_upload
    success, _ = self.send_POST('/Upload', stream, headers=headers)
  File "/usr/local/lib/python3.5/dist-packages/opendrop/client.py", line 112, in send_POST
    self.http_conn.request('POST', url, body=body, headers=_headers)
  File "/usr/lib/python3.5/http/client.py", line 1107, in request
    self._send_request(method, url, body, headers)
  File "/usr/lib/python3.5/http/client.py", line 1152, in _send_request
    self.endheaders(body)
  File "/usr/lib/python3.5/http/client.py", line 1103, in endheaders
    self._send_output(message_body)
  File "/usr/lib/python3.5/http/client.py", line 936, in _send_output
    self.send(message_body)
  File "/usr/lib/python3.5/http/client.py", line 905, in send
    self.sock.sendall(datablock)
  File "/usr/lib/python3.5/ssl.py", line 899, in sendall
    v = self.send(data[count:])
  File "/usr/lib/python3.5/ssl.py", line 869, in send
    return self._sslobj.write(data)
  File "/usr/lib/python3.5/ssl.py", line 594, in write
    return self._sslobj.write(data)
BrokenPipeError: [Errno 32] Broken pipe

Example stack trace of the [Errno 104] Connection reset by peer exception:

pi@raspberrypi:~ $ opendrop send -r 0 -f IMG_0631.jpg 
Asking receiver to accept ...
Receiver accepted
Uploading file ...
Traceback (most recent call last):
  File "/usr/local/bin/opendrop", line 11, in <module>
    load_entry_point('opendrop==0.10', 'console_scripts', 'opendrop')()
  File "/usr/local/lib/python3.5/dist-packages/opendrop/cli.py", line 38, in main
    AirDropCli(sys.argv[1:])
  File "/usr/local/lib/python3.5/dist-packages/opendrop/cli.py", line 85, in __init__
    self.send()
  File "/usr/local/lib/python3.5/dist-packages/opendrop/cli.py", line 162, in send
    if not self.client.send_upload(self.file):
  File "/usr/local/lib/python3.5/dist-packages/opendrop/client.py", line 201, in send_upload
    success, _ = self.send_POST('/Upload', stream, headers=headers)
  File "/usr/local/lib/python3.5/dist-packages/opendrop/client.py", line 112, in send_POST
    self.http_conn.request('POST', url, body=body, headers=_headers)
  File "/usr/lib/python3.5/http/client.py", line 1107, in request
    self._send_request(method, url, body, headers)
  File "/usr/lib/python3.5/http/client.py", line 1152, in _send_request
    self.endheaders(body)
  File "/usr/lib/python3.5/http/client.py", line 1103, in endheaders
    self._send_output(message_body)
  File "/usr/lib/python3.5/http/client.py", line 936, in _send_output
    self.send(message_body)
  File "/usr/lib/python3.5/http/client.py", line 905, in send
    self.sock.sendall(datablock)
  File "/usr/lib/python3.5/ssl.py", line 899, in sendall
    v = self.send(data[count:])
  File "/usr/lib/python3.5/ssl.py", line 869, in send
    return self._sslobj.write(data)
  File "/usr/lib/python3.5/ssl.py", line 594, in write
    return self._sslobj.write(data)
ConnectionResetError: [Errno 104] Connection reset by peer

Installed opendrop using pip installation method.

<Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/PIL/ImageFile.py", line 498, in _save
    fh = fp.fileno()
io.UnsupportedOperation: fileno

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/PIL/Image.py", line 476, in _getencoder
    encoder = getattr(core, encoder_name + "_encoder")
AttributeError: module 'PIL._imaging' has no attribute 'jpeg2k_encoder'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/bin/opendrop", line 10, in <module>
    sys.exit(main())
  File "/usr/local/lib/python3.7/dist-packages/opendrop/cli.py", line
36, in main
    AirDropCli(sys.argv[1:])
  File "/usr/local/lib/python3.7/dist-packages/opendrop/cli.py", line
87, in __init__
    self.send()
  File "/usr/local/lib/python3.7/dist-packages/opendrop/cli.py", line
166, in send
    if not self.client.send_ask(self.file):
  File "/usr/local/lib/python3.7/dist-packages/opendrop/client.py",
line 151, in send_ask
    icon = AirDropUtil.generate_file_icon(f.name)
  File "/usr/local/lib/python3.7/dist-packages/opendrop/util.py", line
175, in generate_file_icon
    im.save(imgByteArr, format='JPEG2000')
  File "/usr/lib/python3/dist-packages/PIL/Image.py", line 2084, in save
    save_handler(self, fp, filename)
  File "/usr/lib/python3/dist-packages/PIL/Jpeg2KImagePlugin.py", line
294, in _save
    ImageFile._save(im, fp, [("jpeg2k", (0, 0) + im.size, 0, kind)])
  File "/usr/lib/python3/dist-packages/PIL/ImageFile.py", line 503, in _save
    e = Image._getencoder(im.mode, e, a, im.encoderconfig)
  File "/usr/lib/python3/dist-packages/PIL/Image.py", line 479, in _getencoder
    raise IOError("encoder %s not available" % encoder_name)
OSError: encoder jpeg2k not available

I've tried everything that I could think of to install jpeg2k (too many things to list, mostly making sure that all of the openjpeg stuff was installed)

Traceback (most recent call last):
  File "/usr/local/bin/opendrop", line 11, in <module>
    load_entry_point('opendrop==0.10.3', 'console_scripts', 'opendrop')()
  File "/usr/local/lib/python3.6/site-packages/opendrop/cli.py", line 38, in main
    AirDropCli(sys.argv[1:])
  File "/usr/local/lib/python3.6/site-packages/opendrop/cli.py", line 77, in __init__
    self.find()
  File "/usr/local/lib/python3.6/site-packages/opendrop/cli.py", line 96, in find
    self.browser = AirDropBrowser(self.config)
  File "/usr/local/lib/python3.6/site-packages/opendrop/client.py", line 49, in __init__
    self.zeroconf = Zeroconf(interfaces=[self.ip_addr], ipv6_interface_name=config.interface)
  File "/usr/local/lib/python3.6/site-packages/opendrop/zeroconf.py", line 1779, in __init__
    socket.inet_aton(_MDNS_ADDR) + socket.inet_aton(i))
TypeError: inet_aton() argument 1 must be str, not IPv4Address

i have the following problem related to the os i use i am running chromeos and used homecrew to install owl i have a strange poblem with opendrop although new devices are found in owl but i can't discover them or finding them with the following error message

`/usr/local/lib64/python3.10/site-packages/zeroconf/_services/browser.py:179: FutureWarning: <opendrop.client.AirDropBrowser object at 0x7ae7ba49ef20> has no update_service method. Provide one (it can be empty if you don't care about the updates), it'll become mandatory. warnings.warn(

Exception in thread Thread-3 (_send_discover): Traceback (most recent call last): File "/usr/local/lib64/python3.10/threading.py", line 1016, in _bootstrap_inner self.run() File "/usr/local/lib64/python3.10/threading.py", line 953, in run self._target(*self._args, **self._kwargs) File "/usr/local/lib/python3.10/site-packages/opendrop/cli.py", line 156, in _send_discover receiver_name = client.send_discover() File "/usr/local/lib/python3.10/site-packages/opendrop/client.py", line 141, in send_discover _, response_bytes = self.send_POST("/Discover", discover_plist_binary) File "/usr/local/lib/python3.10/site-packages/opendrop/client.py", line 115, in send_POST self.http_conn.request("POST", url, body=body, headers=_headers) File "/usr/local/lib64/python3.10/http/client.py", line 1282, in request self._send_request(method, url, body, headers, encode_chunked) File "/usr/local/lib64/python3.10/http/client.py", line 1328, in _send_request self.endheaders(body, encode_chunked=encode_chunked) File "/usr/local/lib64/python3.10/http/client.py", line 1277, in endheaders self._send_output(message_body, encode_chunked=encode_chunked) File "/usr/local/lib64/python3.10/http/client.py", line 1037, in _send_output self.send(msg) File "/usr/local/lib64/python3.10/http/client.py", line 975, in send self.connect() File "/usr/local/lib64/python3.10/http/client.py", line 1447, in connect super().connect() File "/usr/local/lib64/python3.10/http/client.py", line 941, in connect self.sock = self._create_connection( File "/usr/local/lib/python3.10/site-packages/opendrop/client.py", line 318, in create_connection_awdl raise err File "/usr/local/lib/python3.10/site-packages/opendrop/client.py", line 308, in create_connection_awdl sock.connect(sa) OSError: [Errno 101] Network is unreachable ^Cmunmap_chunk(): invalid pointer`

how to solve it

when i start opendrop find it through this error although owl is still running !!!!

`Looking for receivers. Press Ctrl+C to stop ... /usr/local/lib/python3.8/site-packages/zeroconf/_services/browser.py:168: FutureWarning: <opendrop.client.AirDropBrowser object at 0x7d797418be80> has no update_service method. Provide one (it can be empty if you don't care about the updates), it'll become mandatory. warnings.warn(

Error with socket 4 (('fe80::eb8:2aff:fe00:5aa6', 5353, 0, 21))): [Errno 101] Network is unreachable Traceback (most recent call last): File "/usr/local/lib/python3.8/asyncio/selector_events.py", line 1048, in sendto self._sock.sendto(data, addr) OSError: [Errno 101] Network is unreachable `

do you have any clue for that ?

I am trying to transfer a text file between two mac books.

Opendrop find works as expected -- ./opendrop find Looking for receivers. Press Ctrl+C to stop ... /Users/haimonti/Library/Python/3.9/lib/python/site-packages/zeroconf/_services/browser.py:168: FutureWarning: <opendrop.client.AirDropBrowser object at 0x1043857c0> has no update_service method. Provide one (it can be empty if you don't care about the updates), it'll become mandatory. warnings.warn( Found index 0 ID 242435eddd0c name Haimonti Dutta’s iPhone Found index 1 ID bb3502543837 name jac325p-duttaOLD

But opendrop send gives an error after asking the receiver to accept, receiver accepted, and uploading file (airdrop is cancelled eventually). In particular, here is the error:

./opendrop send -r 1 -f /Users/haimonti/Research/DDM/DistMomMethods/test.txt Asking receiver to accept ... Receiver accepted Uploading file ... Exception ignored in: <function ArchiveEntry.del at 0x102dd1c10> Traceback (most recent call last): File "/Users/haimonti/Library/Python/3.9/lib/python/site-packages/libarchive/entry.py", line 51, in del ffi.entry_free(self._entry_p) AttributeError: _entry_p Traceback (most recent call last): File "/Users/haimonti/Library/Python/3.9/bin/./opendrop", line 8, in sys.exit(main()) File "/Users/haimonti/Library/Python/3.9/lib/python/site-packages/opendrop/cli.py", line 36, in main AirDropCli(sys.argv[1:]) File "/Users/haimonti/Library/Python/3.9/lib/python/site-packages/opendrop/cli.py", line 112, in init self.send() File "/Users/haimonti/Library/Python/3.9/lib/python/site-packages/opendrop/cli.py", line 196, in send if not self.client.send_upload(self.file, is_url=self.is_url): File "/Users/haimonti/Library/Python/3.9/lib/python/site-packages/opendrop/client.py", line 214, in send_upload archive.add_abs_file(f, os.path.join(".", ff)) File "/Users/haimonti/Library/Python/3.9/lib/python/site-packages/opendrop/util.py", line 184, in add_abs_file entry = ArchiveEntry(None, entry_p) TypeError: init() takes from 1 to 2 positional arguments but 3 were given

Any suggestions would be very helpful. Thanks much in advance.

I think I have installed opendrop correctly (I just did it through the pip command). Whenever I run the opendrop find command, my terminal (MacOS) keeps searching for receivers but none are ever found.

Do I have to add specific settings to my iPhone in order for it to work?

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