[tor-bugs] #12971 [- Select a component]: Invalid SOCKS5 response to UDP associate request

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#12971: Invalid SOCKS5 response to UDP associate request
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 Reporter:  yurivict271           |          Owner:
     Type:  defect                |         Status:  new
 Priority:  normal                |      Milestone:
Component:  - Select a component  |        Version:
 Keywords:                        |  Actual Points:
Parent ID:                        |         Points:
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 The attached script sends UDP ASSOCIATE request to tor socks5 server. It
 gets two bytes in response:
 $ ./testcase.py
 >> 05 03 00 01 08 08 08 08 00 35
 << 05 00

 As per RFC 1928, this response is invalid. Only 2 bytes out of 10 expected
 bytes are in response (see Section 6: Replies). Subsection "UDP ASSOCIATE"
 there says "In the reply to a UDP ASSOCIATE request, the BND.PORT and
 BND.ADDR fields indicate the port number/address where the client MUST
 send UDP request messages to be relayed."

 Tor sends back only two fields: 05 (version), 00 (Reply field=succeeded),
 and nothing else. It should either send ip/port in a full reply, or
 (maybe) 05 01 (error response).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/12971>
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