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Author SHA1 Message Date
Mike Perry
a956b20c1d Add a delta parameter to Vegas. 
This allows us to cap the queue use during steady state. In shadow, this
reduced instances of long circuit queues at relays.
 2022-02-22 19:28:35 +00:00
Mike Perry
3a3f111b23 Exit slow start at the gamma threshold 
This improves performance and fairness.
 2022-02-22 19:28:35 +00:00
Mike Perry
1960bf09f3 Increment by at least 2 sendme_incs in slow start 2022-02-22 19:28:35 +00:00
Mike Perry
d62f9c9d00 Only apply more frequent cwnd updates after slow start. 2022-02-22 19:28:35 +00:00
Mike Perry
43f6f3fd3a Make N_EWMA a percentage of CWND update rate, capped by a max value. 
This proved better in Shadow sims than just a multiple of CWND.
 2022-02-22 19:28:35 +00:00
Mike Perry
3079e2cacc Relocate two parameters from circuit scope to global scope. 
Changes in these will not affect in-progress transfers.
 2022-02-22 19:28:35 +00:00
Mike Perry
4f3a0e39cf Guard against 0 time delta in BDP calc. 
This can only happen in Shadow, but it will cause issues there.
 2022-02-22 19:28:35 +00:00
Mike Perry
8052d0c2c0 Increase RTT ratio used to detect monotime jumps/stalls. 
In Shadow, we saw RTT jumps as high as 1000 naturally.

So let's set this to 5000, to give us some breathing room.
 2022-02-22 19:28:35 +00:00
Mike Perry
338d00ba92 Fix NULL pointer deref in logs 2022-02-22 19:28:35 +00:00
Mike Perry
86f81abe30 Properly compute the number or recv cells from deliver_window 
Without this conversion, there is an implict 1000-recv_cells, which causes
the mod to fail if it is not a factor of 1000.
 2022-02-22 19:28:35 +00:00
Mike Perry
b2553bfba2 Use path type hint for Vegas queue parameters. 
These parameters will vary depending on path length, especially for onions.
 2022-02-22 19:28:35 +00:00
Mike Perry
0a6cde8756 Set new defaults for congestion control parameters. 
Defaults determined from Shadow experimentation.

More parameter functionality changes to follow.
 2022-02-22 19:28:35 +00:00
David Goulet
d4cf3fadec cc: Change edge_get_ccontrol() to look at both cpath and on_circuit 
Signed-off-by: David Goulet <dgoulet@torproject.org>
 2022-02-22 19:28:35 +00:00
David Goulet
02f4e7b42e cc: Export sendme_inc validation into public function 
This is needed for client validation of server descriptor value,
before launching a rend/intro.
 2022-02-22 19:28:34 +00:00
David Goulet
bbf160d311 cc: Use trunnel extension for ntorv3 circ parameters 
Signed-off-by: David Goulet <dgoulet@torproject.org>
 2022-02-22 19:28:34 +00:00
David Goulet
dd938e58d3 protover: Add function to get the value of a single type 
We can now query the protover subsystem to get the current value we
support for a specific protover type.

This will be useful for prop324 onion service part which puts in the
FlowCtrl value in the service descriptor.

No behavior change.

Signed-off-by: David Goulet <dgoulet@torproject.org>
 2022-02-22 19:28:34 +00:00
Mike Perry
6b2086773c Add test for congestion control negotiation logic. 2022-02-22 19:28:34 +00:00
Mike Perry
b2789ae72a Add hidden torrc option to always try CC negotiation. 
This is for public network testing and for sbws. Should not otherwise be used,
hence it is an undocumented __option.

The option deliberately does not allow force-disabling congestion control, as
this is bad for queueing and fairness.
 2022-02-22 19:28:34 +00:00
Mike Perry
a0eeadfba2 Handle other places that use onion handshake type values 
We want ntor and ntorv3 to use the same queues and stats.
 2022-02-22 19:28:34 +00:00
Mike Perry
a07e008616 Congestion control usage of negotiated params 2022-02-22 19:28:34 +00:00
Mike Perry
1b1c261080 Protover flag handling for congestion control negotiation 2022-02-22 19:28:34 +00:00
Mike Perry
76bdadce12 Hook up client usage of congestion control negotiation 2022-02-22 19:28:34 +00:00
Mike Perry
b6d5fbba7d Implement congestion control parameter negotiation 2022-02-22 19:28:34 +00:00
Nick Mathewson
93318ba5e2 Convert TODO into TODO-324 for better visibility. 2022-02-22 19:28:33 +00:00
Nick Mathewson
662b9c1c0d Add stub argument for constructing congestion_control_t 2022-02-22 19:28:33 +00:00
Nick Mathewson
a511718a30 Negotiated circuit parameters must pass from worker. 2022-02-22 19:28:33 +00:00
Nick Mathewson
baaabb503c Use protover to signal support for ntor3 + congestion control. 2022-02-22 19:28:33 +00:00
Nick Mathewson
bd2e9a4409 Implement core of ntor3 negotiation. 
There are a lot of TODOs about what to send, whom to send it to, and
etc.
 2022-02-22 19:28:33 +00:00
Nick Mathewson
244444e8b1 Add an exported struct to onion handshakes for circuits params 
THis will eventually hold the congestion control parameters that we
negotiated, plus whatever else is relevant.
 2022-02-22 19:28:33 +00:00
Nick Mathewson
358ce9a19d Add a size argument for the buffer on onion handshake functions 2022-02-22 19:28:33 +00:00
David Goulet
763d72238d kist: Don't try to flush empty outbuf 
It is possible that a scheduled channel ended up with 0 bytes in its
outbuf after the scheduling loop and having an outbuf table entry
indicating that we need to flush bytes on the wire after the loop.

This lead to attempt to write 0 bytes up to the TLS layer that would
prevent such action.

All in all, this fixes wasted CPU cycles on attempting to flush nothing.

Fixes #40548

Signed-off-by: David Goulet <dgoulet@torproject.org>
 2022-02-08 09:31:17 -05:00
Nick Mathewson
7a3d60d471 Use an alternative solution to the warning in trace_probes_cc.c 2022-01-20 14:46:38 -05:00
Nick Mathewson
935d7b5803 Resolve typedef conflict from congestion_control_t 
Resumes being able to build on old / esoteric gcc versions.

Fixes bug 40550; bugfix on 0.4.7.1-alpha.
 2022-01-20 14:22:00 -05:00
David Goulet
a4510603f7 Merge branch 'maint-0.4.6' 2022-01-18 13:12:35 -05:00
David Goulet
7d9d769123 Merge branch 'maint-0.4.5' into maint-0.4.6 2022-01-18 13:12:35 -05:00
David Goulet
aac5731f86 Merge branch 'maint-0.3.5' into maint-0.4.5 2022-01-18 13:12:13 -05:00
David Goulet
72041c6306 relay: Don't advertise HSv2 protocol version 
We removed HSIntro=3 and HSDir=1 that are v2 specific. Since 0.3.5.17,
we do not support introducing or being a directory for onion service v2.

Closes #40509

Signed-off-by: David Goulet <dgoulet@torproject.org>
 2022-01-18 12:39:06 -05:00
Alexander Færøy
48d778bc32 Merge remote-tracking branch 'tor-gitlab/mr/491' into main 2021-12-15 12:41:00 +00:00
Nick Mathewson
dd085d42f9 Do not count controller-selected paths towards path bias. 
As a side effect, this fixes a "Bug" warning.

Closes #40515.  Bugfix on 0.2.4.10-alpha.
 2021-11-15 08:55:47 -05:00
David Goulet
77b265f96e Merge branch 'maint-0.4.5' into maint-0.4.6 2021-11-05 10:44:10 -04:00
David Goulet
1c77deca4f Merge branch 'maint-0.4.6' 2021-11-05 10:44:10 -04:00
David Goulet
a7fe37f1fa protover: Fix merge forward from 035 
Signed-off-by: David Goulet <dgoulet@torproject.org>
 2021-11-05 10:42:54 -04:00
David Goulet
47adba879c Merge branch 'maint-0.3.5' into maint-0.4.5 2021-11-05 10:35:08 -04:00
Nick Mathewson
439e17180c Light edit to protover warnings. 2021-11-05 10:30:57 -04:00
David Goulet
f93cd5deb8 protover: Add a note on why LinkAuth is not recommended or required 
Signed-off-by: David Goulet <dgoulet@torproject.org>
 2021-11-05 10:16:08 -04:00
David Goulet
3d1a49908c protover: Move all hardcoded lists in one place 
This also moves the warnings and add some theatrical effect around the
code so anyone modifying those list should notice the warnings signs and
read the comment accordingly.

Signed-off-by: David Goulet <dgoulet@torproject.org>
 2021-11-05 10:13:47 -04:00
Nick Mathewson
7c085490f5 Add scary warnings about changing the protover list. 
Doing this in the wrong way has potential to cause serious havoc on
the network, so let's make it harder for future programmers to mess
it up.
 2021-11-05 09:20:05 -04:00
Alexander Færøy
ee38ec02f3 Use TOR_PRIuSZ instead of %ld for CC logging. 
This patch fixes the current build of main on Windows.
 2021-10-29 19:08:20 +00:00
Alexander Færøy
ae05f06597 Merge branch 'tor-gitlab/mr/452_squashed' into main 2021-10-21 12:57:37 +00:00
Nick Mathewson
fc542167cb Implement a MiddleOnly flag for vote generation. 
This proposal implements part of Prop335; it's based on a patch
from Neel Chauhan.

When configured to do so, authorities will assign a MiddleOnly flag
to certain relays.  Any relay which an authority gives this flag
will not get Exit, V2Dir, Guard, or HSDir, and might get BadExit if
the authority votes for that one.
 2021-10-21 12:57:20 +00:00