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Re: [tor-bugs] #21312 [Obfuscation/Snowflake]: snowflake-client is pegged at 100% cpu
#21312: snowflake-client is pegged at 100% cpu
-----------------------------------+--------------------------------
Reporter: arlolra | Owner: arlolra
Type: defect | Status: needs_revision
Priority: High | Milestone:
Component: Obfuscation/Snowflake | Version:
Severity: Major | Resolution:
Keywords: | Actual Points:
Parent ID: | Points:
Reviewer: | Sponsor:
-----------------------------------+--------------------------------
Changes (by dcf):
* status: needs_review => needs_revision
Comment:
Replying to [comment:28 dcf]:
> So, is the last thing needed for this ticket a patch for server-webrtc?
Here's a stab at it.
Stand by. The server-webrtc process stopped running for some reason. I'm
not sure if it's related to the patch or not. I'll try running it again
with a debugger attached.
The last messages in the server-webrtc log:
{{{
2018/03/13 03:27:19 sdp offer successfully received.
2018/03/13 03:27:19 Generating answer...
2018/03/13 03:27:19 answering HTTP POST
2018/03/13 03:27:19 OnDataChannel
2018/03/13 03:27:19 OnOpen channel
2018/03/13 03:27:25 Write 543 bytes --> WebRTC
}}}
The last messages in the client log:
{{{
2018/03/13 03:27:19 WebRTC: DataChannel.OnOpen
2018/03/13 03:27:20 Traffic Bytes (in|out): 1086 | 1086 -- (2 OnMessages,
2 Sends)
2018/03/13 03:27:29 WebRTC: At capacity [3/3] Retrying in 10 seconds...
2018/03/13 03:27:30 Traffic Bytes (in|out): 0 | 543 -- (0 OnMessages, 1
Sends)
2018/03/13 03:27:39 WebRTC: No messages received for 30 seconds -- closing
stale connection.
2018/03/13 03:27:39 WebRTC: closing DataChannel
2018/03/13 03:27:39 WebRTC: DataChannel.OnClose [locally]
2018/03/13 03:27:39 WebRTC: closing PeerConnection
2018/03/13 03:27:39 WebRTC: Closing
2018/03/13 03:27:39 WebRTC: Collecting a new Snowflake. Currently at [2/3]
2018/03/13 03:27:39 snowflake-6UnoOk512PFjOuaU connecting...
2018/03/13 03:27:39 WebRTC: PeerConnection created.
2018/03/13 03:27:39 WebRTC: OnNegotiationNeeded
2018/03/13 03:27:39 WebRTC: DataChannel created.
2018/03/13 03:27:39 candidate:1749024283 1 udp 2122260223 X.X.X.X 57098
typ host generation 0 ufrag GUHO network-id 1 network-cost 50
2018/03/13 03:27:39 candidate:649855723 1 tcp 1518280447 X.X.X.X 33197 typ
host tcptype passive generation 0 ufrag GUHO network-id 1 network-cost 50
2018/03/13 03:27:39 WebRTC: OnIceComplete
2018/03/13 03:27:39 Negotiating via BrokerChannel...
Target URL:
Front URL: 127.0.0.1:8080
2018/03/13 03:27:39 http://127.0.0.1:8080/client
2018/03/13 03:27:39 "http://127.0.0.1:8080/client";
2018/03/13 03:27:39 BrokerChannel Error: dial tcp 127.0.0.1:8080:
getsockopt: connection refused
2018/03/13 03:27:39 Failed to retrieve answer. Retrying in 10 seconds
2018/03/13 03:27:41 Traffic Bytes (in|out): 0 | 543 -- (0 OnMessages, 1
Sends)
2018/03/13 03:27:46 WebRTC: No messages received for 30 seconds -- closing
stale connection.
2018/03/13 03:27:46 WebRTC: closing DataChannel
2018/03/13 03:27:46 WebRTC: DataChannel.OnClose [locally]
2018/03/13 03:27:46 WebRTC: closing PeerConnection
2018/03/13 03:27:46 WebRTC: Closing
2018/03/13 03:27:46 copy loop ended
2018/03/13 03:27:46 ---- Handler: closed ---
2018/03/13 03:27:46 SOCKS listening...
2018/03/13 03:27:46 SOCKS accepted: {0.0.3.0:1 map[]}
2018/03/13 03:27:46 ---- Handler: snowflake assigned ----
2018/03/13 03:27:49 WebRTC: No messages received for 30 seconds -- closing
stale connection.
2018/03/13 03:27:49 WebRTC: closing DataChannel
2018/03/13 03:27:49 WebRTC: DataChannel.OnClose [locally]
2018/03/13 03:27:49 WebRTC: closing PeerConnection
2018/03/13 03:27:49 WebRTC: Closing
2018/03/13 03:27:49 copy loop ended
2018/03/13 03:27:49 ---- Handler: closed ---
2018/03/13 03:27:49 SOCKS listening...
2018/03/13 03:27:49 Negotiating via BrokerChannel...
Target URL:
Front URL: 127.0.0.1:8080
2018/03/13 03:27:49 http://127.0.0.1:8080/client
2018/03/13 03:27:49 "http://127.0.0.1:8080/client";
2018/03/13 03:27:49 BrokerChannel Error: dial tcp 127.0.0.1:8080:
getsockopt: connection refused
2018/03/13 03:27:49 Failed to retrieve answer. Retrying in 10 seconds
2018/03/13 03:27:51 Traffic Bytes (in|out): 0 | 190 -- (0 OnMessages, 1
Sends)
2018/03/13 03:27:59 Negotiating via BrokerChannel...
Target URL:
Front URL: 127.0.0.1:8080
2018/03/13 03:27:59 http://127.0.0.1:8080/client
2018/03/13 03:27:59 "http://127.0.0.1:8080/client";
2018/03/13 03:27:59 BrokerChannel Error: dial tcp 127.0.0.1:8080:
getsockopt: connection refused
2018/03/13 03:27:59 Failed to retrieve answer. Retrying in 10 seconds
}}}
(Then it repeats with further getsockopt errors.)
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21312#comment:29>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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