[tor-dev] Introducing Snowflake (webrtc pt)

Tue Jan 26 01:55:04 UTC 2016

> On 26 Jan 2016, at 12:47, Arlo Breault <arlo at torproject.org> wrote:
> 
> 
>> I get about this far on OS X, I'm behind a NAT:
>> 
>> Jan 26 12:25:50.063 [notice] Tor v0.2.7.6 running on Darwin with Libevent 2.0.22-stable, OpenSSL 1.0.2e and Zlib 1.2.8.
>> …
>> Jan 26 12:25:50.071 [notice] Opening Socks listener on 127.0.0.1:9050
>> Jan 26 12:25:50.000 [notice] Parsing GEOIP IPv4 file /opt/local/share/tor/geoip.
>> Jan 26 12:25:50.000 [notice] Parsing GEOIP IPv6 file /opt/local/share/tor/geoip6.
>> Jan 26 12:25:50.000 [notice] Bootstrapped 0%: Starting
>> Jan 26 12:25:50.000 [notice] Delaying directory fetches: No running bridges
>> Jan 26 12:25:52.000 [notice] Bootstrapped 5%: Connecting to directory server
>> Jan 26 12:25:52.000 [notice] Bootstrapped 10%: Finishing handshake with directory server
>> 
>> Any hints?
> 
> Can you paste a sanitized version of your snowflake.log
> (same dir as client) so we can see how far it gets?
> 
> The pt should make a domain-fronted request to,
> https://snowflake-reg.appspot.com/
> with an sdp offer and receive an answer,
> then try to negotiate a session with a snowflake (proxy) using,
> stun:stun.l.google.com:19302

I'm connected using dual-stack IPv4 and IPv6, but I'm not sure if that's the issue.

-----

2016/01/26 12:23:15 starting
2016/01/26 12:23:18 OnNegotiationNeeded
2016/01/26 12:23:18 OnIceCandidate {"candidate":"candidate:4081377822 1 udp 2122262783 2001:... 49215 typ host generation 0 ufrag MhDVA7+9JyUZKlqY","sdpMid":"data","sdpMLineIndex":0}
2016/01/26 12:23:18 OnIceCandidate {"candidate":"candidate:44203497 1 udp 2122194687 10…. 60053 typ host generation 0 ufrag MhDVA7+9JyUZKlqY","sdpMid":"data","sdpMLineIndex":0}
2016/01/26 12:23:18 OnIceCandidate {"candidate":"candidate:3183943406 1 tcp 1518283007 2001:... 64926 typ host tcptype passive generation 0 ufrag MhDVA7+9JyUZKlqY","sdpMid":"data","sdpMLineIndex":0}
2016/01/26 12:23:18 OnIceCandidate {"candidate":"candidate:1277264153 1 tcp 1518214911 10…. 64927 typ host tcptype passive generation 0 ufrag MhDVA7+9JyUZKlqY","sdpMid":"data","sdpMLineIndex":0}
2016/01/26 12:23:21 OnIceCandidate {"candidate":"candidate:1036294592 1 udp 1685987071 180... 60053 typ srflx raddr 10…. rport 60053 generation 0 ufrag MhDVA7+9JyUZKlqY","sdpMid":"data","sdpMLineIndex":0}
2016/01/26 12:23:21 OnIceComplete
2016/01/26 12:23:21 ----------------

{"type":"offer","sdp":"v=0\r\no=- 8307480261278365747 2 IN IP4 127.0.0.1\r\ns=-\r\nt=0 0\r\na=msid-semantic: WMS\r\nm=application 60053 DTLS/SCTP 5000\r\nc=IN IP4 180….\r\na=candidate:4081377822 1 udp 2122262783 2001:... 49215 typ host generation 0\r\na=candidate:44203497 1 udp 2122194687 10…. 60053 typ host generation 0\r\na=candidate:3183943406 1 tcp 1518283007 2001:... 64926 typ host tcptype passive generation 0\r\na=candidate:1277264153 1 tcp 1518214911 10…. 64927 typ host tcptype passive generation 0\r\na=candidate:1036294592 1 udp 1685987071 180…. 60053 typ srflx raddr 10…. rport 60053 generation 0\r\na=ice-ufrag:MhDVA7+9JyUZKlqY\r\na=ice-pwd:8P3MROhYGYJJ6PBD4sxh5Hs6\r\na=fingerprint:sha-256 6A:2F:9D:5D:DF:83:9C:0A:2F:73:CF:1E:2D:AF:FF:F4:05:08:C8:C5:30:37:1C:A0:CE:C8:C6:1A:D0:E0:12:44\r\na=setup:actpass\r\na=mid:data\r\na=sctpmap:5000 webrtc-datachannel 1024\r\n"}

2016/01/26 12:23:21 ----------------
2016/01/26 12:23:21 waiting for answer
2016/01/26 12:23:21 Sending offer via meek channel...
Target URL:  https://snowflake-reg.appspot.com/
Front URL:   www.google.com
2016/01/26 12:23:25 MeekChannel Response:
200 OK

2016/01/26 12:23:25 Received Answer:

v=0
o=- 1195921414501541321 2 IN IP4 127.0.0.1
s=-
t=0 0
a=msid-semantic: WMS
m=application 48952 DTLS/SCTP 5000
c=IN IP4 199.241.201.138
b=AS:30
a=candidate:2885715399 1 udp 2122260223 192.168…. 48952 typ host generation 0
a=candidate:3800267063 1 tcp 1518280447 192.168…. 0 typ host tcptype active generation 0
a=candidate:759726963 1 udp 1686052607 199... 48952 typ srflx raddr 192.168…. rport 48952 generation 0
a=ice-ufrag:gW3Squmad22xQeoQ
a=ice-pwd:OAGHWixl0ZICWg2JYTXOri3W
a=fingerprint:sha-256 A5:1A:FC:85:52:BE:D6:68:08:52:BE:66:B7:84:08:45:0F:63:47:70:1E:4F:E1:7D:1A:EC:67:47:D4:74:D3:07
a=setup:active
a=mid:data
a=sctpmap:5000 webrtc-datachannel 1024

2016/01/26 12:25:48 WebRTC: interrupted

-----

Tim Wilson-Brown (teor)

teor2345 at gmail dot com
PGP 968F094B

teor at blah dot im
OTR CAD08081 9755866D 89E2A06F E3558B7F B5A9D14F

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