Chromebooks browser can't connect: invalid packet header format

[totaam]

Issue migrated from trac ticket # 1729

component: android | priority: major | resolution: fixed

2017-12-29 10:49:01: pma created the issue

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Xenials Firefox can connect to the same server. Chromebooks browser tries to connect number of times, but eventually gives up. Server is running on Ubuntu Xenial.

Attached server log shows successful connection with Firefox and failed connection with chromebook.

Browsers chrome://version:

Google Chrome 64.0.3282.41 (Official Build) beta (64-bit)
Revision  0
Platform  10176.22.0 (Official Build) beta-channel auron_paine
Firmware Version  Google_Auron_paine.6301.58.98
ARC   4510202
JavaScript    V8 6.4.388.9
Flash 28.0.0.133 /opt/google/chrome/pepper/libpepflashplayer.so
User Agent    Mozilla/5.0 (X11; CrOS x86_64 10176.22.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.41 Safari/537.36
Command Line  /opt/google/chrome/chrome --ppapi-flash-path=/opt/google/chrome/pepper/libpepflashplayer.so --ppapi-flash-version=28.0.0.133 --ui-prioritize-in-gpu-process --use-gl=egl --enable-native-gpu-memory-buffers --gpu-sandbox-failures-fatal=yes --enable-logging --log-level=1 --use-cras --enable-wayland-server --user-data-dir=/home/chronos --max-unused-resource-memory-usage-percentage=5 --system-developer-mode --login-profile=user --has-chromeos-keyboard --default-wallpaper-large=/usr/share/chromeos-assets/wallpaper/oem_large.jpg --default-wallpaper-small=/usr/share/chromeos-assets/wallpaper/oem_small.jpg --default-wallpaper-is-oem --guest-wallpaper-large=/usr/share/chromeos-assets/wallpaper/guest_large.jpg --guest-wallpaper-small=/usr/share/chromeos-assets/wallpaper/guest_small.jpg --enable-consumer-kiosk --arc-availability=officially-supported --enterprise-enrollment-initial-modulus=15 --enterprise-enrollment-modulus-limit=19 --login-user=petteri.markkula@multitaction.com --login-profile=ac0b6d3c52a505b6b20d0c9fdf6226a6dbab684c --flag-switches-begin --enable-video-player-chromecast-support --enable-features=WebRtcHWH264Encoding,WebRtcHWVP8Encoding --flag-switches-end --vmodule=*arc/*=1,tablet_power_button_controller=1,*chromeos/login/*=1,auto_enrollment_controller=1,*plugin*=2,*zygote*=1,*/ui/ozone/*=1,*/ui/display/manager/chromeos/*=1,*night_light*=1,power_button_observer=2,webui_login_view=2,lock_state_controller=2,webui_screen_locker=2,screen_locker=2 --enable-features=WebRtcHWH264Encoding,WebRtcHWVP8Encoding
Executable Path   /opt/google/chrome/chrome
Profile Path  /home/chronos/u-ac0b6d3c52a505b6b20d0c9fdf6226a6dbab684c
Variations    6a89113b-ccb9a6a5
1e528f0f-f23d1dea
b130ecb8-2e32ee7e
6345b824-3f4a17df
38eb801c-3f4a17df
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79898f76-f23d1dea
9e201a2b-38d7ffb9
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9773d3bd-f23d1dea
93731dca-3d47f4f4
8e3b2dc5-93702590
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4bc337ce-612a79a3
1354da85-f34af386
17507c76-3f4a17df
494d8760-6843eff2
3ac60855-486e2a9c
f296190c-116bbed1
4442aae2-6e3b1976
ed1d377-e1cc0f14
75f0f0a0-6bdfffe7
e2b18481-6bdfffe7
e7e71889-e1cc0f14
f5fff3a2-f5fff3a2
f141d4bc-28ad44a
da4aaa01-f23d1dea

[totaam]

2017-12-29 10:50:45: pma uploaded file failed_browser_connect.log (42.0 KiB)

Log from server with --debug=protocol.

[totaam]

2017-12-29 10:57:49: antoine changed owner from antoine to pma

[totaam]

2017-12-29 10:57:49: antoine commented

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From your log, I see that bencode is generating invalid data in the browser:

Error parsing bencode packet:[0m
 invalid literal for long() with base 10: 'Infinity'
failed to parse bencode packet: 6c353a68656c6c6f64373a7665...

Unfortunately, the packet data was not logged in full. Here's what can be decoded:

$ python -c "import binascii;print(binascii.unhexlify('6c353a68656c6c6f64373a76657273696f6e353a322e322e31383a706c6174666f726d353a506f73697831333a706c6174666f726d2e6e616d65353a506f73697831383a706c6174666f726d2e70726f636573736f72373a756e6b6e6f776e31373a706c6174666f726d2e706c6174666f726d3130363a352e3020285831313b'))"
l5:hellod7:version5:2.2.18:platform5:Posix13:platform.name5:Posix18:platform.processor7:unknown17:platform.platform106:5.0 (X11;

Can you try to capture the packet data using tcpdump?

[totaam]

2018-01-02 12:06:26: pma commented

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Is it enough to capture tcp traffic on port 14500?

Btw. I did not get notification email when the ticket was updated.

[totaam]

2018-01-02 12:39:56: antoine commented

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Is it enough to capture tcp traffic on port 14500? Yes.

Btw. I did not get notification email when the ticket was updated. I'm not aware of any problems with the mail service. (ie: I get them)

[totaam]

2018-01-02 12:58:37: pma uploaded file tcpdump.log.xz (768.0 KiB)

"tcpdump tcp port 14500 -i eth0 -w tcpdump.log" from server.

[totaam]

2018-01-02 13:02:23: pma commented

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Tcpdump log attached.

I am not getting any emails. I already had trouble with registration verification email.

[totaam]

2018-01-02 13:26:52: antoine commented

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That tcpdump is big! Lots of things we don't care about (HTTP requests and responses for all the assets), but I can't seem to find the hello packet. This might just be easier (raw dump, before compression, before wrapping using websockets):

--- html5/js/Protocol.js  (revision 17823)
+++ html5/js/Protocol.js  (working copy)
@@ -368,6 +368,7 @@
      var bdata = null;
      try {
          bdata = bencode(packet);
+         console.log("packet", packet[0], ""+bdata.length+" bytes:", bdata);
      }
      catch (e) {
          console.error("Error: failed to bencode packet:", packet);

Temporarily apply this patch to the client and capture the hello packet from the javascript console output. Something in there contains Infinity, we just need to know what.

I am not getting any emails. I already had trouble with registration verification email. I'll keep an eye on the MTA logs this time and report here.

[totaam]

2018-01-02 13:48:11: antoine commented

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I'll keep an eye on the MTA logs this time and report here. It might have been because the outgoing emails were going through the virus and spam detection. Other gmail addresses worked though..

[totaam]

2018-01-02 13:52:36: pma commented

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I got the notification!

[totaam]

2018-01-02 14:59:30: pma commented

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When trying to build with

debuild -us -uc -b

I get some brotli usage errors (it doesn't recognize -k option) and this

make[1]: Leaving directory '/home/petteri/Share/Xpra/trunk/src'
   dh_install
dh_install: xpra missing files: usr/share/xpra/cuda/*
dh_install: missing files, aborting
debian/rules:12: recipe for target 'binary' failed
make: *** [binary] Error 2
dpkg-buildpackage: error: fakeroot debian/rules binary gave error exit status 2
debuild: fatal error at line 1376:
dpkg-buildpackage -rfakeroot -D -us -uc -b failed

Am I missing some development package?

[totaam]

2018-01-02 15:07:50: antoine commented

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When trying to build with debuild... The change is a one liner to the the html5 client, you can just apply it by hand to your existing install.

I get some brotli usage errors (it doesn't recognize -k option) and this Your distro version of brotli is out of date. That's OK, we just fallback to gzip.

dh_install: xpra missing files: usr/share/xpra/cuda/* It expects to find the CUDA kernels for NVENC, but you don't have the headers installed so they didn't get built. Easiest thing to do is just to remove this path from the xpra.install file.

[totaam]

2018-01-02 15:22:26: pma uploaded file failed_browser_connect2.log (31.2 KiB)

Server log with oneliner from comment #5.

[totaam]

2018-01-02 15:23:56: pma commented

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Replying to [comment:9 Antoine Martin]:

The change is a one liner to the the html5 client, you can just apply it by hand to your existing install.

Didn't realize that. Added the line and attached new server log.

[totaam]

2018-01-02 15:24:18: antoine commented

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Server log with oneliner from comment:5 There won't be anything in the server log, the message is going to be in the browser's javascript console output. (usually under "developer tools")

[totaam]

2018-01-02 15:41:58: pma commented

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Here it is.

packet hello 6106 bytes: l5:hellod7:version5:2.2.18:platform5:Posix13:platform.name5:Posix18:platform.processor7:unknown17:platform.platform106:5.0 (X11; CrOS x86_64 10176.22.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.41 Safari/537.3612:session-type6:Chrome17:session-type.full114:Mozilla/5.0 (X11; CrOS x86_64 10176.22.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.41 Safari/537.369:namespacei1e5:sharei0e5:steali1e11:client_type5:HTML516:encoding.generici1e8:username0:4:uuid36:198af9c7-afa3-6060-7d85-8f119745f0764:argvl31:http://mtc1216:14500/index.htmle6:digestl4:hmac8:hmac+md53:xor8:hmac+md59:hmac+sha111:hmac+sha256e11:salt-digestl4:hmac8:hmac+md53:xor8:hmac+md59:hmac+sha111:hmac+sha256e4:zlibi1e3:lzoi0e17:compression_leveli1e7:rencodei0e7:bencodei1e4:yamli0e15:connection-datad4:type8:ethernet14:effective-type2:4g8:downlinki8550000e12:downlink.maxiInfinitye3:rtti50ee3:lz4i1e14:lz4.js.version5:0.5.116:encoding.rgb_lz4i1e18:auto_refresh_delayi500e12:randr_notifyi1e19:sound.server_driveni1e20:server-window-resizei1e23:notify-startup-completei1e21:generic-rgb-encodingsi1e12:window.raisei1e26:window.initiate-moveresizei1e18:metadata.supportedl10:fullscreen9:maximized5:above5:below5:title10:size-hints14:class-instance13:transient-for11:window-type11:decorations17:override-redirect4:tray5:modal7:opacitye9:encodingsl4:jpeg3:png3:rgb5:rgb324:webpe16:raw_window_iconsi1e23:encoding.icons.max_sizeli30ei30ee14:encodings.corel4:jpeg3:png3:rgb5:rgb324:webpe21:encodings.rgb_formatsl4:RGBX4:RGBAe21:encodings.window-iconl3:pnge16:encodings.cursorl3:pnge14:encoding.flushi1e21:encoding.transparencyi1e23:encoding.client_optionsi1e18:encoding.csc_atomsi1e18:encoding.scrollingi1e20:encoding.color-gamut4:srgb22:encoding.video_scalingi1e23:encoding.full_csc_modesd4:h264l7:YUV420Pe9:mpeg4+mp4l7:YUV420Pe8:h264+mp4l7:YUV420Pe8:vp8+webml7:YUV420Pee29:encoding.x264.YUV420P.profile8:baseline29:encoding.h264.YUV420P.profile8:baseline27:encoding.h264.YUV420P.level3:2.119:encoding.h264.cabaci0e31:encoding.h264.deblocking-filteri0e33:encoding.h264+mp4.YUV420P.profile4:main31:encoding.h264+mp4.YUV420P.level3:3.025:encoding.h264.score-deltai-20e29:encoding.h264+mp4.score-deltai50e30:encoding.mpeg4+mp4.score-deltai50e29:encoding.vp8+webm.score-deltai50e13:sound.receivei1e10:sound.sendi0e14:sound.decodersle21:sound.bundle-metadatai1e18:encoding.rgb24zlibi1e17:encoding.rgb_zlibi1e7:windowsi1e8:keyboardi1e13:xkbmap_layout2:us15:xkbmap_keycodeslli8e9:BackSpacei8ei0ei0eeli9e3:Tabi9ei0ei0eeli12e8:KP_Begini12ei0ei0eeli13e6:Returni13ei0ei0eeli16e7:Shift_Li16ei0ei0eeli17e9:Control_Li17ei0ei0eeli18e5:Alt_Li18ei0ei0eeli19e5:Pausei19ei0ei0eeli20e9:Caps_Locki20ei0ei0eeli27e6:Escapei27ei0ei0eeli31e11:Mode_switchi31ei0ei0eeli32e5:spacei32ei0ei0eeli33e5:Priori33ei0ei0eeli34e4:Nexti34ei0ei0eeli35e3:Endi35ei0ei0eeli36e4:Homei36ei0ei0eeli37e4:Lefti37ei0ei0eeli38e2:Upi38ei0ei0eeli39e5:Righti39ei0ei0eeli40e4:Downi40ei0ei0eeli42e5:Printi42ei0ei0eeli45e6:Inserti45ei0ei0eeli46e6:Deletei46ei0ei0eeli48e1:0i48ei0ei0eeli49e1:1i49ei0ei0eeli50e1:2i50ei0ei0eeli51e1:3i51ei0ei0eeli52e1:4i52ei0ei0eeli53e1:5i53ei0ei0eeli54e1:6i54ei0ei0eeli55e1:7i55ei0ei0eeli56e1:8i56ei0ei0eeli57e1:9i57ei0ei0eeli58e5:coloni58ei0ei0eeli59e9:semicoloni59ei0ei0eeli60e4:lessi60ei0ei0eeli61e5:equali61ei0ei0eeli62e7:greateri62ei0ei0eeli63e8:questioni63ei0ei0eeli64e2:ati64ei0ei0eeli65e1:ai65ei0ei0eeli66e1:bi66ei0ei0eeli67e1:ci67ei0ei0eeli68e1:di68ei0ei0eeli69e1:ei69ei0ei0eeli70e1:fi70ei0ei0eeli71e1:gi71ei0ei0eeli72e1:hi72ei0ei0eeli73e1:ii73ei0ei0eeli74e1:ji74ei0ei0eeli75e1:ki75ei0ei0eeli76e1:li76ei0ei0eeli77e1:mi77ei0ei0eeli78e1:ni78ei0ei0eeli79e1:oi79ei0ei0eeli80e1:pi80ei0ei0eeli81e1:qi81ei0ei0eeli82e1:ri82ei0ei0eeli83e1:si83ei0ei0eeli84e1:ti84ei0ei0eeli85e1:ui85ei0ei0eeli86e1:vi86ei0ei0eeli87e1:wi87ei0ei0eeli88e1:xi88ei0ei0eeli89e1:yi89ei0ei0eeli90e1:zi90ei0ei0eeli91e4:Menui91ei0ei0eeli92e4:Menui92ei0ei0eeli93e8:KP_Enteri93ei0ei0eeli96e1:0i96ei0ei0eeli97e1:1i97ei0ei0eeli98e1:2i98ei0ei0eeli99e1:3i99ei0ei0eeli100e1:4i100ei0ei0eeli101e1:5i101ei0ei0eeli102e1:6i102ei0ei0eeli103e1:7i103ei0ei0eeli104e1:8i104ei0ei0eeli105e1:9i105ei0ei0eeli106e11:KP_Multiplyi106ei0ei0eeli107e6:KP_Addi107ei0ei0eeli109e11:KP_Subtracti109ei0ei0eeli110e9:KP_Deletei110ei0ei0eeli111e9:KP_Dividei111ei0ei0eeli112e2:F1i112ei0ei0eeli113e2:F2i113ei0ei0eeli114e2:F3i114ei0ei0eeli115e2:F4i115ei0ei0eeli116e2:F5i116ei0ei0eeli117e2:F6i117ei0ei0eeli118e2:F7i118ei0ei0eeli119e2:F8i119ei0ei0eeli120e2:F9i120ei0ei0eeli121e3:F10i121ei0ei0eeli122e3:F11i122ei0ei0eeli123e3:F12i123ei0ei0eeli124e3:F13i124ei0ei0eeli125e3:F14i125ei0ei0eeli126e3:F15i126ei0ei0eeli127e3:F16i127ei0ei0eeli128e3:F17i128ei0ei0eeli129e3:F18i129ei0ei0eeli130e3:F19i130ei0ei0eeli131e3:F20i131ei0ei0eeli132e3:F21i132ei0ei0eeli133e3:F22i133ei0ei0eeli134e3:F23i134ei0ei0eeli135e3:F24i135ei0ei0eeli144e8:Num_Locki144ei0ei0eeli145e11:Scroll_Locki145ei0ei0eeli160e15:dead_circumflexi160ei0ei0eeli161e6:exclami161ei0ei0eeli162e8:quotedbli162ei0ei0eeli163e10:numbersigni163ei0ei0eeli164e6:dollari164ei0ei0eeli165e7:percenti165ei0ei0eeli166e9:ampersandi166ei0ei0eeli167e10:underscorei167ei0ei0eeli168e9:parenlefti168ei0ei0eeli169e10:parenrighti169ei0ei0eeli170e8:asteriski170ei0ei0eeli171e4:plusi171ei0ei0eeli172e3:bari172ei0ei0eeli173e5:minusi173ei0ei0eeli174e9:bracelefti174ei0ei0eeli175e10:bracerighti175ei0ei0eeli176e10:asciitildei176ei0ei0eeli186e9:semicoloni186e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[totaam]

2018-01-02 15:52:11: antoine commented

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Here it is Thanks. That was easy, the problem comes from the bandwidth detection code added in 2.2 (see #1581#comment:3), the fix is in r17830.

You can test using the latest html5 client code here: [http://xpra.org/html5/connect.html]

Please close this ticket if the fix works for you.

[totaam]

2018-01-02 15:58:11: pma commented

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It does work for me.