Noel Hibbard

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Posts posted by Noel Hibbard

  1. This worked for me on Win8.1x64. 

    {    "storage_path" : "c:/BTSync",    "use_gui" : true,    "webui" : {        "listen" : "127.0.0.1:8888",        "login" : "<someusername>",        "password" : "<somepassword>",        "api_key" : "<someAPIkey>"    }}

    Then save this file in this path (path and filename are important):

    "%UserProfile%\AppData\Roaming\BitTorrent Sync\sync.conf"

     

    Then launch BTSync without any command line options.

  2. Yes you are right, if you look at the data in my packets it should look something like this:

    d<RecordLength>:<Record><RecordLength>:<Record>e

    But you can see in my data the packets are truncated so it is something like:

    d4:test10:012345

    When it should look something like:

    d4:test10:01234567890e

    I am capturing at the source which is odd, what could possibly be manipulating the packets before they leave the machine? For the other machines that I tested I was just capturing traffic from a remote machine. So hardware in between could have been a factor.

  3. I just did some closer examination of the broadcast traffic with Wireshark and I am seeing some malformed UDP packets. The length of the data on some of these packets doesn't match the payload header. Some of these multicast packets are truncated.

    Here is a snippet of a few good packets along with a few bad ones:

    https://dl.dropbox.c...k/Sample.pcapng

    Right now I have 4 shares. If I have "Search LAN" enabled on all of them I get packet loss and in Wireshark I see these truncated multicast packets. I have a filter set in Wireshark to ip.dst == 239.192.0.0 so I can easily see the stuff I am conserned about. I then started turning off "Search LAN" one share at a time and found one share that isn't producing these truncated packets. So I can actually enable "Search LAN" on this one share and don't get any packet loss or truncated packets. But on any of these other shares I get instant truncated packets and packet loss if I turn "Search LAN" on.

    I shot a video of my desktop (both monitors) while I was running through several scenarios. You can view it here:

    http://www.ustream.tv/recorded/37963169

    The video contradicts what I typed up here though. It seems very inconsistent. I typed that post up, then had LAN search disabled on all shares for several minutes while I tracked down some screen recording software. Then when I got back to it I could reproduce the exact same results. Now it sees no single share will produce the malformed packets. You have to enable it on two or more to generate the malformed packets. But the one thing that is consistent is that the packet loss coincides with the malformed packets.

  4. When you ask if I have any machines with two NICs I assume you mean machines running BTSync. If so, no. There are however a bunch of machines on the network with two NICs and possibly even both connected (WiFi and Ethernet) but none of those machines are running BTSync. At this point there is only one machine on this network running BTSync and that is my own. The only other place I have BTSync running is at the house on another subnet which is connected via IPSec.

    I shut down the IPSec tunnel which broke the peer that was running at the house but I figured it would recover and start routing over the internet rather than trying to route through the IPSec tunnel but it never did (without the help of the relay). I finally just turned the IPSec tunnel back on but even then my peers refused to talk to each other. I removed the shares and readded them a few times (on both peers) and restarted BTSync a few times. I even left it alone while I went out for lunch. Came back and it still wasn't talking. So I shut down BTSync and wiped out my <UserProfile>\AppData\Roaming\BitTorrent Sync folder and then relaunched BTSync, added my shares and it instantly started syncing and isn't dropping packets either.

    I am seriously confused. Hahaha

    Can't wait until we get an API for BTSync so I can write a tool to export and import all my shares so I don't have to do it by hand every time.

  5. That is a good idea. So I shutdown my tunnel and now that peer can't be reached (without the relay). When looking at the debug log I see these lines:

    [2013-08-28 12:47:30] Peer 7: 76.123.123.123:38820 003B8615EF1D57ED65734960A43EB8C9DA0D3222
    [2013-08-28 12:47:30] Peer 7: local IP 10.18.1.1:49525

    I masked my public IP in this log but you can see the port number on the public IP is different from the private. 49525 is the port that I have set for the listening port and is auto forwarded by UPnP on my router. I have no clue where port 38820 came from and how it expects people to communicate on that port if it isn't requesting that port to be opened via UPnP. So my peer at home is going through the relay now. I manually added 76.123.123.123:49525 (again, a fake IP) to my peer list and now it is direct again.

    I guess I am a little confused about how peers discover each other.

    But I guess I am getting a little off topic. I will report back my findings related to the packet loss stuff.

  6. Okay... I think I am getting somewhere. As I said, packet loss is still happening even when syncing is paused (not to be confused with idle). So with syncing paused I decided to take a look at the traffic with Wireshark and I see that the only traffic going on now is broadcasts and what looks like some talk with trackers. So I then went into all my shares and disabled the "Search LAN" option. So now while syncing is paused I am only seeing traffic with trackers. The broadcast traffic stopped. After making that change I saw the packet loss go away. To be sure I left it for about 10mins (really 10secs is long enough seeing how bad it was before). It stayed clean the whole time. So I just added back all of my shares which should dramatically increase the load. When I first added them all back I saw some packet loss again but after going into these shares and disabling the "Search LAN" option the loss has gone away again.

    I am going to let it run for several hours and see how it goes. It has been clean for another 10mins so I think this is the answer. So now the question is why would the "Search LAN" option cause my machine to have packet loss that is so bad I can hardly get anything done?

  7. I just tested the iOS client and it does this. I can sync with an entire music library and browse through the folders and click on the files I want it to download. If I no longer want that file on the phone I can swipe the file to delete it (Make sure you are using a read-only hash before deleting though).

    I would love to see something like this come to the other platforms.

  8. Yeah I understand ICMP isn't guaranteed, the thing is I will be doing something like remote controlling another machine where it is very obvious that packets are dropped because the whole screen freezes for a few seconds and then I look over at my second monitor to see PingPlotter showing a bunch of red. Then it recovers and my RDP session starts responding again. Some goes for websites. I click a link and it just sits. Or if I have a file transfer going (via HTTP) and it will just hang for a few secs and then resume. Shut down BTSync and all goes back to normal.

    I thought maybe it was related to other machines on my LAN so I shut the one and only client on the LAN other than my own. I also shot down one that was running on my machine at the house which is connected via IPSec just to rule that out too. The problem persists. Then I started removing shares one by one and one they are all gone the packet loss goes away. I tried adding them one at a time and in different orders trying to find one share that may have an older client with a bug or something but the packet loss comes back the second I add a share.

    I have watched the traffic (with shares but all in sync and idle) with Wireshark and there is still a lot of traffic, but really any traffic in Wireshark looks like a ton. hahaha. I need to dig in a little closer with Wireshark and see if I can find anything consistent.

    So right now I am just starting BTSync on demand. Kind of a pain. :(

  9. I don't have any problems transferring files. The problem is packet loss on my whole computer. BTSync works fine otherwise. This isn't the first machine I have experienced this on either. I was running it on a server that is running Server 2008 R2 x64 and it was doing the same thing. It would drop packets so bad you could hardly even connect to the machine via RDP. As soon as you would kill BTSync the machine would go back to normal.

    What is odd too is BTSync causes me to drop packets even when it is totally in sync and idle. BTSync isn't creating any CPU activity or disk activity either.

    I have never seen a windows app cause packet loss before. Bad drivers, bad NIC, bad cable, bad port on switch or bad stitch, but never an application.

  10. I have been having very bad packet loss on my machine the past 3 weeks and have tried everything under the sun to find the cause. New cable, different port on the switch, different NIC, firewall changes and on and on. I finally figured out what was causing the problem. BTSync! As soon as I close BTSync the loss goes away. Start it back up and I am back to lost packets. I am not talking about a packet here and there, I am talking about 60 - 70% loss. I am extremely excited to find the source but not be able to use BTSync anymore.

    Has anyone ever experienced this and if so, any ideas?

    This is on Win8x64 and client version 1.1.69.

  11. I have all my ports opened and most devices in the devices tap show up as Cloud connections. I have a handful of devices that are direct connects though so I don't think it is my end. I went through the debug log and located a few people that clearly haven't setup their port forwarding correctly which explains why they show as clouds but a few people have ports that are open (using some port checking sites to verify) and those people are still showing up as clouds.

    I have one share that about 7 people are connected to. All but one of them shows as a cloud yet one of the guys on the other end is telling me that everyone on his list shows direct except for me. Very strange.