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39 Commits
Author SHA1 Message Date
David Fifield f168777a13 dns Message.Opcode method. 2020-04-19 10:33:40 -06:00
David Fifield 4b0b144257 Consolidate the authoritative domain check. 
Formerly this was split into two pieces: one that did the domain check
and set the AA bit, and another that checked the AA bit and returned an
error if it was not set. It was done in two parts because the check for
UDP payload size occurred in the middle. Since 59f03791 the payload
check is moved to the end, so we can do the authoritative domain check
in one piece.
 2020-04-19 10:28:56 -06:00
David Fifield 0567fa9abb Remove addr fro "cannot parse DNS query" log message. 2020-04-19 09:44:05 -06:00
David Fifield e9a98c3aef Avoid logging EOF and ErrClosedPipe errors. 
smux Stream.WriteTo may return io.EOF, which breaks the contract of
io.Copy that says it should not return io.EOF. smux.Stream doesn't have
a unidirectional shutdown, so we always end up slamming it shut in both
directions and leave the other direction with a broken pipe.
 2020-04-19 02:13:48 -06:00
David Fifield 34b7e82af4 More logging of query validation errors in server. 2020-04-19 01:17:33 -06:00
David Fifield 98bf401738 Use NXDOMAIN rather than FORMERR for QTYPE != TXT. 2020-04-19 01:13:35 -06:00
David Fifield 59f03791df Do the payload size check after the TXT and base32 checks. 
That way we can respond with NXDOMAIN rather than FORMERR to more of the
random queries that arrive.
 2020-04-19 00:59:04 -06:00
David Fifield 04e1295e52 Infer a payload size of 512 even when there is no OPT RR. 
Before we were inferring a size of 0. It would still be rejected for
being too small, but was confusing with the log messages I am adding.
 2020-04-19 00:53:34 -06:00
David Fifield 294f1acc7d Fix second AA check. 2020-04-19 00:53:34 -06:00
David Fifield 1e57ed8d42 Add missing return for EDNS version != 0. 2020-04-19 00:53:34 -06:00
David Fifield 7fad23ceca Reduce maxUDPPayload to 1232 for compatibility with Quad9. 2020-04-19 00:53:34 -06:00
David Fifield 0a630f91c5 Log stream begin/end in server, log conv in client. 2020-04-18 19:05:23 -06:00
David Fifield b1bf9164a7 -privkey-file and -pubkey-file options. 2020-04-18 17:56:45 -06:00
David Fifield 505db3ec23 Server -privkey option and client -pubkey option. 2020-04-18 17:35:32 -06:00
David Fifield cd03021417 Note -udp is required on server. 2020-04-18 16:02:14 -06:00
David Fifield b98eb2c75e Move dummyAddr to turbotunnel.DummyAddr. 2020-04-18 16:02:14 -06:00
David Fifield f69e4e0d71 Truncation and TC bit in responses. 2020-04-18 16:02:14 -06:00
David Fifield e53d332eca Reduce response delay to 1 s. 
To be below the reported Quad9 timeout.
 2020-04-18 16:02:14 -06:00
David Fifield 7f3e9e4571 Overlay a noise layer atop KCP. 2020-04-18 14:34:10 -06:00
David Fifield f8b9d73493 Switch up order of query checks in server. 
We should set the AA bit if it applies, even if there are things wrong
with the query. An EDNS(0)-related error supersedes all others.
 2020-04-18 14:34:10 -06:00
David Fifield 0a568a386b Need to set RR class in responses. 
The lack of this (Class==0) worked fine with Google UDP and DoH, and
Cloudflare UDP, but failed with Cloudflare DoH (the DoH resolver
stripped the TXT RR).
 2020-04-18 14:34:04 -06:00
David Fifield f2abcbf4de Larger downstream capacity. 2020-04-18 14:33:39 -06:00
David Fifield 0022cdd16c EDNS check 2020-04-18 14:33:39 -06:00
David Fifield 163ae7f1b8 Per-message byte limit depends on name length. 2020-04-18 14:33:39 -06:00
David Fifield f1ee951fd6 Timer priority. 2020-04-18 14:33:39 -06:00
David Fifield 443a3ac855 delay resp 2020-04-18 14:33:39 -06:00
David Fifield 8aace665d5 Bundle multiple packets downstream. 2020-04-18 14:33:36 -06:00
David Fifield 0a8e5f5b72 Packet framing downstream. 2020-04-18 14:29:30 -06:00
David Fifield 2050034fb1 Factor out separate sending and receiving threads. 2020-04-18 14:29:30 -06:00
David Fifield 5bb844b00a Logging in server. 2020-04-18 14:29:30 -06:00
David Fifield 933f17de78 Packetization and padding in the client→server direction. 2020-04-18 14:29:29 -06:00
David Fifield 0e72afd1e7 Downstream MTU. 2020-04-18 14:29:14 -06:00
David Fifield 3b48d1aee1 Send full 8-byte ClientID 
Sending just 4 bytes and relying on the convid for the remaining bytes
doesn't work for empty polling requests. Could probably just eliminate
the convid and make it a static constant before feeding to KCP.
 2020-04-18 14:28:55 -06:00
David Fifield 9f72a8a87d client 2020-04-18 14:28:53 -06:00
David Fifield cfbbc9aaee Better command-line usage message. 2020-04-18 14:23:11 -06:00
David Fifield 6633ee8b8d Exchange payloads. 2020-04-18 14:23:11 -06:00
David Fifield 32bf8ef5db Generating a response. 2020-04-18 13:18:08 -06:00
David Fifield 57dbb4a4a8 MessageFromWireFormat 2020-04-18 13:18:08 -06:00
David Fifield cdeecf2ec6 Starting on server. 2020-04-18 13:18:04 -06:00