[tor-bugs] #30498 [Circumvention/Snowflake]: Proxy-go is receiving a lot of client timeouts

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#30498: Proxy-go is receiving a lot of client timeouts
-------------------------------------+---------------------------
 Reporter:  cohosh                   |          Owner:  (none)
     Type:  defect                   |         Status:  new
 Priority:  Medium                   |      Milestone:
Component:  Circumvention/Snowflake  |        Version:
 Severity:  Normal                   |     Resolution:
 Keywords:  snowflake                |  Actual Points:
Parent ID:                           |         Points:
 Reviewer:                           |        Sponsor:  Sponsor19
-------------------------------------+---------------------------

Comment (by phw):

 Here's another data point. It's from a proxy-go instance that I run on my
 laptop, behind a NAT.

 {{{
 INFO: configuration.go:256: Converting Config:
 &{[{[stun:stun.l.google.com:19302]  }] All Balanced }
 INFO: peerconnection.go:168: Created PeerConnection:  &{<nil> <nil> false
 <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil> <nil>
 {[{[stun:stun.l.google.com:19302]  }] 3 0 } 0x7f05600008c0 77}
 0x7f05600008c0
 INFO: peerconnection.go:436: fired OnSignalingStateChange:  77
 HaveRemoteOffer
 2019/06/05 15:57:03 sdp offer successfully received.
 2019/06/05 15:57:03 Generating answer...
 INFO: peerconnection.go:436: fired OnSignalingStateChange:  77 Stable
 INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  77
 INFO: peerconnection.go:495: fired OnConnectionStateChange:  77
 INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 77
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:4184645392 1 udp 2122262783 2600:1700:2ec0:6430::710 33908 typ
 host generation 0 ufrag 25g6network-id 3 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:2723859191 1 udp 2122197247
 2600:1700:2ec0:6430:66aa:6bd9:61bb:2d40 46469 typ host generation 0 ufrag
 25g6 network-id 7 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:3287535956 1 udp 2122131711 2600:1700:2ec0:6430::68e 39170 typ
 host generation 0 ufrag 25g6network-id 8 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:3885250869 1 udp 2122063615 172.17.0.1 35276 typ host generation
 0 ufrag 25g6 network-id 1 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:1995739850 1 udp 2121998079 192.168.1.65 36136 typ host
 generation 0 ufrag 25g6 network-id 2 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:3707591233 1 udp 2121932543 192.168.1.67 59569 typ host
 generation 0 ufrag 25g6 network-id 6 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:2162486046 1 udp 1685790463 108.208.27.175 36136 typ srflx raddr
 192.168.1.65 rport 36136 generation 0 ufrag 25g6 network-id 2 network-cost
 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77 candidate:79019993
 1 udp 1685855999 108.208.27.175 35276 typ srflx raddr 172.17.0.1 rport
 35276 generation 0 ufrag 25g6 network-id 1 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:3085919200 1 tcp 1518283007 2600:1700:2ec0:6430::710 34815 typ
 host tcptype passive generation 0 ufrag 25g6 network-id 3 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:3973658119 1 tcp 1518217471
 2600:1700:2ec0:6430:66aa:6bd9:61bb:2d40 50359 typ host tcptype passive
 generation 0 ufrag 25g6 network-id 7 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:2372939172 1 tcp 1518151935 2600:1700:2ec0:6430::68e 35785 typ
 host tcptype passive generation 0 ufrag 25g6 network-id 8 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:2836907461 1 tcp 1518083839 172.17.0.1 33511 typ host tcptype
 passive generation 0 ufrag 25g6 network-id 1 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77 candidate:947351098
 1 tcp 1518018303 192.168.1.65 43871 typ host tcptype passive generation 0
 ufrag 25g6 network-id 2 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77
 candidate:2457773745 1 tcp 1517952767 192.168.1.67 47947 typ host tcptype
 passive generation 0 ufrag 25g6 network-id 6 network-cost 50
 INFO: peerconnection.go:459: fired OnIceCandidate:  77 candidate:720184213
 1 udp 1685724927 108.208.27.175 59569 typ srflx raddr 192.168.1.67 rport
 59569 generation 0 ufrag 25g6 network-id 6 network-cost 50
 INFO: peerconnection.go:513: fired OnIceGatheringStateChange: 77
 2019/06/05 15:57:23 Timed out waiting for client to open data channel.
 INFO: peerconnection.go:504: fired OnIceConnectionStateChange:  77
 INFO: peerconnection.go:436: fired OnSignalingStateChange:  77 Closed
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30498#comment:2>
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