Delete all the bespoke hashing logic and replace it with
DiskManager.GetHashAsync.

DiskManager ...

This will be useful when creating torrents. In this scenario
we want to be able to read a piece ...

Increase some timeouts as some web servers, specifically some
from internet archive, take longer...

These are internal variables so there's no concern about
exposing consts as public API.

There w...

Error out if this is ever negative.

The bep52 spec is woefully unclear about what happens when a
file is a lot smaller than the piec...

HaveBundle and RequestBundle are cached/reused, so we should just
instantiate a HaveMessage/Requ...

The engine now uses the exact same logic for 'picking'
bittorrent v2 hashes, fetching the metada...

Move piece picker so it relies on two things.
1) The concept of a 'Piece'. Each piece is a thing...

When fetching hashes from other peers, we'll never need to request
hashes for files which have o...

If we are downloading a V2 only torrent we will only have
the V2 infohash in the engine, as such...

Missing a conversion from index -> bytelength here.

This ensures Modes never see a potentially incorrect picker.

This is a bit easier to reason through for most of the math.

Add the core classes used to create and operate merkle trees
This would've been better as a seri...

Oops?

t

bep47

Whoops :) Tests are always important!

This will unblock bep 0047 from merging as md5 hashes are computed
correctly now.

The sha sums ...

Add the beginnings of a 'FetchHashes' mode.

There's some cleanup for this PR already, but the gist of it is.

1) The torrent metadata is no ...

Don't reinstantiate the Random or it'll choose the
same port repeatedly because it's seeded from...

as the previous file in the torrent.

Ensures empty files at the end of a torrent are never the o...

Simplify the way different pickers are enabled/disabled. The engine will
now create a standard p...

Whoops :)

[core] Better read-only bitfield support

By having 'MutableBitfield' be a subclass of 'BitField' it's possible
for users of the library t...

Fails because md5sum isn't present in the torrent

We can fast path some things here which may slightly improve the
performance of this code at run...

[bep52] Ensure nothing is downloaded before piece hashes are available

The addition of this bitfield ensures no pieces are downloaded by the
engine until V2 piece hash...

[bep52] Modify the API to support dynamically retrieving Bep52 hashes

We should treat this as having no hash data, and ensure
'isvalid' always returns false. This sho...

The torrent metadata is no longer the source of truth for piece
hashes. Piece hashes are optiona...

This test covers the fix merged as part of
ed563b6da29a01d2a7deb5096d2db2f5460c75b9

Hybrid torrents aren't fully supported (yet). To support these the
engine will load them as eith...

piece length is only available when the torrent metadata has been
loaded, so don't expose it on ...

V2 only magnetlink support

Consolidate on 'DownloadRate' and 'UploadRate' for everything to
do with sending/receiving data.

This is a bit more threadsafe. While it is usually automatically
handled by ClientEngine, users ...

This is a bit more consistent.

ClientEngine automatically starts/stops many things, including the
Dht engine registered with th...

This can only be changed when the engine isn't running, and at that
point it should only really ...

We can pop this in a reusable buffer.

This cropped up as netcoreapp3.0 and net5.0 targets were added
to all the libs which compiled pr...

If the rate limit is high enough then peer connections can/should
always receive in 16kB slices....

Be a little more thorough checking for both the overall max
and the per-torrent max open connect...

We don't need to segregate these i suppose. I've found more uses
for ArraySegment<byte> buffers ...

There's a negligible performance difference when assigning
a buffer to a SocketAsyncEventArgs an...

ReusableTasks 2.0.2 has some perf improvements.

We can completely skip this check if no files are set to
'DoNotDownload'

IThreadPoolWorkItem allocates less data and does less work.

There are optimisations scattered in many files now,
for example ThreadSwitcher.

The original code accidentally created a new delegate every
time the timer expired. This iterati...

Apparently this has negative performance implications on
windows, and it's probably not that muc...

Disregard empty path segments

Nullable reference types