mirror of
https://github.com/zerotier/udwee.git
synced 2026-05-22 16:29:12 -07:00
initial commit
This commit is contained in:
Adam Ierymenko
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@@ -0,0 +1,373 @@
|
||||
Mozilla Public License Version 2.0
|
||||
==================================
|
||||
|
||||
1. Definitions
|
||||
--------------
|
||||
|
||||
1.1. "Contributor"
|
||||
means each individual or legal entity that creates, contributes to
|
||||
the creation of, or owns Covered Software.
|
||||
|
||||
1.2. "Contributor Version"
|
||||
means the combination of the Contributions of others (if any) used
|
||||
by a Contributor and that particular Contributor's Contribution.
|
||||
|
||||
1.3. "Contribution"
|
||||
means Covered Software of a particular Contributor.
|
||||
|
||||
1.4. "Covered Software"
|
||||
means Source Code Form to which the initial Contributor has attached
|
||||
the notice in Exhibit A, the Executable Form of such Source Code
|
||||
Form, and Modifications of such Source Code Form, in each case
|
||||
including portions thereof.
|
||||
|
||||
1.5. "Incompatible With Secondary Licenses"
|
||||
means
|
||||
|
||||
(a) that the initial Contributor has attached the notice described
|
||||
in Exhibit B to the Covered Software; or
|
||||
|
||||
(b) that the Covered Software was made available under the terms of
|
||||
version 1.1 or earlier of the License, but not also under the
|
||||
terms of a Secondary License.
|
||||
|
||||
1.6. "Executable Form"
|
||||
means any form of the work other than Source Code Form.
|
||||
|
||||
1.7. "Larger Work"
|
||||
means a work that combines Covered Software with other material, in
|
||||
a separate file or files, that is not Covered Software.
|
||||
|
||||
1.8. "License"
|
||||
means this document.
|
||||
|
||||
1.9. "Licensable"
|
||||
means having the right to grant, to the maximum extent possible,
|
||||
whether at the time of the initial grant or subsequently, any and
|
||||
all of the rights conveyed by this License.
|
||||
|
||||
1.10. "Modifications"
|
||||
means any of the following:
|
||||
|
||||
(a) any file in Source Code Form that results from an addition to,
|
||||
deletion from, or modification of the contents of Covered
|
||||
Software; or
|
||||
|
||||
(b) any new file in Source Code Form that contains any Covered
|
||||
Software.
|
||||
|
||||
1.11. "Patent Claims" of a Contributor
|
||||
means any patent claim(s), including without limitation, method,
|
||||
process, and apparatus claims, in any patent Licensable by such
|
||||
Contributor that would be infringed, but for the grant of the
|
||||
License, by the making, using, selling, offering for sale, having
|
||||
made, import, or transfer of either its Contributions or its
|
||||
Contributor Version.
|
||||
|
||||
1.12. "Secondary License"
|
||||
means either the GNU General Public License, Version 2.0, the GNU
|
||||
Lesser General Public License, Version 2.1, the GNU Affero General
|
||||
Public License, Version 3.0, or any later versions of those
|
||||
licenses.
|
||||
|
||||
1.13. "Source Code Form"
|
||||
means the form of the work preferred for making modifications.
|
||||
|
||||
1.14. "You" (or "Your")
|
||||
means an individual or a legal entity exercising rights under this
|
||||
License. For legal entities, "You" includes any entity that
|
||||
controls, is controlled by, or is under common control with You. For
|
||||
purposes of this definition, "control" means (a) the power, direct
|
||||
or indirect, to cause the direction or management of such entity,
|
||||
whether by contract or otherwise, or (b) ownership of more than
|
||||
fifty percent (50%) of the outstanding shares or beneficial
|
||||
ownership of such entity.
|
||||
|
||||
2. License Grants and Conditions
|
||||
--------------------------------
|
||||
|
||||
2.1. Grants
|
||||
|
||||
Each Contributor hereby grants You a world-wide, royalty-free,
|
||||
non-exclusive license:
|
||||
|
||||
(a) under intellectual property rights (other than patent or trademark)
|
||||
Licensable by such Contributor to use, reproduce, make available,
|
||||
modify, display, perform, distribute, and otherwise exploit its
|
||||
Contributions, either on an unmodified basis, with Modifications, or
|
||||
as part of a Larger Work; and
|
||||
|
||||
(b) under Patent Claims of such Contributor to make, use, sell, offer
|
||||
for sale, have made, import, and otherwise transfer either its
|
||||
Contributions or its Contributor Version.
|
||||
|
||||
2.2. Effective Date
|
||||
|
||||
The licenses granted in Section 2.1 with respect to any Contribution
|
||||
become effective for each Contribution on the date the Contributor first
|
||||
distributes such Contribution.
|
||||
|
||||
2.3. Limitations on Grant Scope
|
||||
|
||||
The licenses granted in this Section 2 are the only rights granted under
|
||||
this License. No additional rights or licenses will be implied from the
|
||||
distribution or licensing of Covered Software under this License.
|
||||
Notwithstanding Section 2.1(b) above, no patent license is granted by a
|
||||
Contributor:
|
||||
|
||||
(a) for any code that a Contributor has removed from Covered Software;
|
||||
or
|
||||
|
||||
(b) for infringements caused by: (i) Your and any other third party's
|
||||
modifications of Covered Software, or (ii) the combination of its
|
||||
Contributions with other software (except as part of its Contributor
|
||||
Version); or
|
||||
|
||||
(c) under Patent Claims infringed by Covered Software in the absence of
|
||||
its Contributions.
|
||||
|
||||
This License does not grant any rights in the trademarks, service marks,
|
||||
or logos of any Contributor (except as may be necessary to comply with
|
||||
the notice requirements in Section 3.4).
|
||||
|
||||
2.4. Subsequent Licenses
|
||||
|
||||
No Contributor makes additional grants as a result of Your choice to
|
||||
distribute the Covered Software under a subsequent version of this
|
||||
License (see Section 10.2) or under the terms of a Secondary License (if
|
||||
permitted under the terms of Section 3.3).
|
||||
|
||||
2.5. Representation
|
||||
|
||||
Each Contributor represents that the Contributor believes its
|
||||
Contributions are its original creation(s) or it has sufficient rights
|
||||
to grant the rights to its Contributions conveyed by this License.
|
||||
|
||||
2.6. Fair Use
|
||||
|
||||
This License is not intended to limit any rights You have under
|
||||
applicable copyright doctrines of fair use, fair dealing, or other
|
||||
equivalents.
|
||||
|
||||
2.7. Conditions
|
||||
|
||||
Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
|
||||
in Section 2.1.
|
||||
|
||||
3. Responsibilities
|
||||
-------------------
|
||||
|
||||
3.1. Distribution of Source Form
|
||||
|
||||
All distribution of Covered Software in Source Code Form, including any
|
||||
Modifications that You create or to which You contribute, must be under
|
||||
the terms of this License. You must inform recipients that the Source
|
||||
Code Form of the Covered Software is governed by the terms of this
|
||||
License, and how they can obtain a copy of this License. You may not
|
||||
attempt to alter or restrict the recipients' rights in the Source Code
|
||||
Form.
|
||||
|
||||
3.2. Distribution of Executable Form
|
||||
|
||||
If You distribute Covered Software in Executable Form then:
|
||||
|
||||
(a) such Covered Software must also be made available in Source Code
|
||||
Form, as described in Section 3.1, and You must inform recipients of
|
||||
the Executable Form how they can obtain a copy of such Source Code
|
||||
Form by reasonable means in a timely manner, at a charge no more
|
||||
than the cost of distribution to the recipient; and
|
||||
|
||||
(b) You may distribute such Executable Form under the terms of this
|
||||
License, or sublicense it under different terms, provided that the
|
||||
license for the Executable Form does not attempt to limit or alter
|
||||
the recipients' rights in the Source Code Form under this License.
|
||||
|
||||
3.3. Distribution of a Larger Work
|
||||
|
||||
You may create and distribute a Larger Work under terms of Your choice,
|
||||
provided that You also comply with the requirements of this License for
|
||||
the Covered Software. If the Larger Work is a combination of Covered
|
||||
Software with a work governed by one or more Secondary Licenses, and the
|
||||
Covered Software is not Incompatible With Secondary Licenses, this
|
||||
License permits You to additionally distribute such Covered Software
|
||||
under the terms of such Secondary License(s), so that the recipient of
|
||||
the Larger Work may, at their option, further distribute the Covered
|
||||
Software under the terms of either this License or such Secondary
|
||||
License(s).
|
||||
|
||||
3.4. Notices
|
||||
|
||||
You may not remove or alter the substance of any license notices
|
||||
(including copyright notices, patent notices, disclaimers of warranty,
|
||||
or limitations of liability) contained within the Source Code Form of
|
||||
the Covered Software, except that You may alter any license notices to
|
||||
the extent required to remedy known factual inaccuracies.
|
||||
|
||||
3.5. Application of Additional Terms
|
||||
|
||||
You may choose to offer, and to charge a fee for, warranty, support,
|
||||
indemnity or liability obligations to one or more recipients of Covered
|
||||
Software. However, You may do so only on Your own behalf, and not on
|
||||
behalf of any Contributor. You must make it absolutely clear that any
|
||||
such warranty, support, indemnity, or liability obligation is offered by
|
||||
You alone, and You hereby agree to indemnify every Contributor for any
|
||||
liability incurred by such Contributor as a result of warranty, support,
|
||||
indemnity or liability terms You offer. You may include additional
|
||||
disclaimers of warranty and limitations of liability specific to any
|
||||
jurisdiction.
|
||||
|
||||
4. Inability to Comply Due to Statute or Regulation
|
||||
---------------------------------------------------
|
||||
|
||||
If it is impossible for You to comply with any of the terms of this
|
||||
License with respect to some or all of the Covered Software due to
|
||||
statute, judicial order, or regulation then You must: (a) comply with
|
||||
the terms of this License to the maximum extent possible; and (b)
|
||||
describe the limitations and the code they affect. Such description must
|
||||
be placed in a text file included with all distributions of the Covered
|
||||
Software under this License. Except to the extent prohibited by statute
|
||||
or regulation, such description must be sufficiently detailed for a
|
||||
recipient of ordinary skill to be able to understand it.
|
||||
|
||||
5. Termination
|
||||
--------------
|
||||
|
||||
5.1. The rights granted under this License will terminate automatically
|
||||
if You fail to comply with any of its terms. However, if You become
|
||||
compliant, then the rights granted under this License from a particular
|
||||
Contributor are reinstated (a) provisionally, unless and until such
|
||||
Contributor explicitly and finally terminates Your grants, and (b) on an
|
||||
ongoing basis, if such Contributor fails to notify You of the
|
||||
non-compliance by some reasonable means prior to 60 days after You have
|
||||
come back into compliance. Moreover, Your grants from a particular
|
||||
Contributor are reinstated on an ongoing basis if such Contributor
|
||||
notifies You of the non-compliance by some reasonable means, this is the
|
||||
first time You have received notice of non-compliance with this License
|
||||
from such Contributor, and You become compliant prior to 30 days after
|
||||
Your receipt of the notice.
|
||||
|
||||
5.2. If You initiate litigation against any entity by asserting a patent
|
||||
infringement claim (excluding declaratory judgment actions,
|
||||
counter-claims, and cross-claims) alleging that a Contributor Version
|
||||
directly or indirectly infringes any patent, then the rights granted to
|
||||
You by any and all Contributors for the Covered Software under Section
|
||||
2.1 of this License shall terminate.
|
||||
|
||||
5.3. In the event of termination under Sections 5.1 or 5.2 above, all
|
||||
end user license agreements (excluding distributors and resellers) which
|
||||
have been validly granted by You or Your distributors under this License
|
||||
prior to termination shall survive termination.
|
||||
|
||||
************************************************************************
|
||||
* *
|
||||
* 6. Disclaimer of Warranty *
|
||||
* ------------------------- *
|
||||
* *
|
||||
* Covered Software is provided under this License on an "as is" *
|
||||
* basis, without warranty of any kind, either expressed, implied, or *
|
||||
* statutory, including, without limitation, warranties that the *
|
||||
* Covered Software is free of defects, merchantable, fit for a *
|
||||
* particular purpose or non-infringing. The entire risk as to the *
|
||||
* quality and performance of the Covered Software is with You. *
|
||||
* Should any Covered Software prove defective in any respect, You *
|
||||
* (not any Contributor) assume the cost of any necessary servicing, *
|
||||
* repair, or correction. This disclaimer of warranty constitutes an *
|
||||
* essential part of this License. No use of any Covered Software is *
|
||||
* authorized under this License except under this disclaimer. *
|
||||
* *
|
||||
************************************************************************
|
||||
|
||||
************************************************************************
|
||||
* *
|
||||
* 7. Limitation of Liability *
|
||||
* -------------------------- *
|
||||
* *
|
||||
* Under no circumstances and under no legal theory, whether tort *
|
||||
* (including negligence), contract, or otherwise, shall any *
|
||||
* Contributor, or anyone who distributes Covered Software as *
|
||||
* permitted above, be liable to You for any direct, indirect, *
|
||||
* special, incidental, or consequential damages of any character *
|
||||
* including, without limitation, damages for lost profits, loss of *
|
||||
* goodwill, work stoppage, computer failure or malfunction, or any *
|
||||
* and all other commercial damages or losses, even if such party *
|
||||
* shall have been informed of the possibility of such damages. This *
|
||||
* limitation of liability shall not apply to liability for death or *
|
||||
* personal injury resulting from such party's negligence to the *
|
||||
* extent applicable law prohibits such limitation. Some *
|
||||
* jurisdictions do not allow the exclusion or limitation of *
|
||||
* incidental or consequential damages, so this exclusion and *
|
||||
* limitation may not apply to You. *
|
||||
* *
|
||||
************************************************************************
|
||||
|
||||
8. Litigation
|
||||
-------------
|
||||
|
||||
Any litigation relating to this License may be brought only in the
|
||||
courts of a jurisdiction where the defendant maintains its principal
|
||||
place of business and such litigation shall be governed by laws of that
|
||||
jurisdiction, without reference to its conflict-of-law provisions.
|
||||
Nothing in this Section shall prevent a party's ability to bring
|
||||
cross-claims or counter-claims.
|
||||
|
||||
9. Miscellaneous
|
||||
----------------
|
||||
|
||||
This License represents the complete agreement concerning the subject
|
||||
matter hereof. If any provision of this License is held to be
|
||||
unenforceable, such provision shall be reformed only to the extent
|
||||
necessary to make it enforceable. Any law or regulation which provides
|
||||
that the language of a contract shall be construed against the drafter
|
||||
shall not be used to construe this License against a Contributor.
|
||||
|
||||
10. Versions of the License
|
||||
---------------------------
|
||||
|
||||
10.1. New Versions
|
||||
|
||||
Mozilla Foundation is the license steward. Except as provided in Section
|
||||
10.3, no one other than the license steward has the right to modify or
|
||||
publish new versions of this License. Each version will be given a
|
||||
distinguishing version number.
|
||||
|
||||
10.2. Effect of New Versions
|
||||
|
||||
You may distribute the Covered Software under the terms of the version
|
||||
of the License under which You originally received the Covered Software,
|
||||
or under the terms of any subsequent version published by the license
|
||||
steward.
|
||||
|
||||
10.3. Modified Versions
|
||||
|
||||
If you create software not governed by this License, and you want to
|
||||
create a new license for such software, you may create and use a
|
||||
modified version of this License if you rename the license and remove
|
||||
any references to the name of the license steward (except to note that
|
||||
such modified license differs from this License).
|
||||
|
||||
10.4. Distributing Source Code Form that is Incompatible With Secondary
|
||||
Licenses
|
||||
|
||||
If You choose to distribute Source Code Form that is Incompatible With
|
||||
Secondary Licenses under the terms of this version of the License, the
|
||||
notice described in Exhibit B of this License must be attached.
|
||||
|
||||
Exhibit A - Source Code Form License Notice
|
||||
-------------------------------------------
|
||||
|
||||
This Source Code Form is subject to the terms of the Mozilla Public
|
||||
License, v. 2.0. If a copy of the MPL was not distributed with this
|
||||
file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
||||
|
||||
If it is not possible or desirable to put the notice in a particular
|
||||
file, then You may include the notice in a location (such as a LICENSE
|
||||
file in a relevant directory) where a recipient would be likely to look
|
||||
for such a notice.
|
||||
|
||||
You may add additional accurate notices of copyright ownership.
|
||||
|
||||
Exhibit B - "Incompatible With Secondary Licenses" Notice
|
||||
---------------------------------------------------------
|
||||
|
||||
This Source Code Form is "Incompatible With Secondary Licenses", as
|
||||
defined by the Mozilla Public License, v. 2.0.
|
||||
@@ -0,0 +1,10 @@
|
||||
UDWee
|
||||
======
|
||||
|
||||
UDWee makes UDP go *weeeeeeeeee* as in really fast. It uses the following approaches on each platform:
|
||||
|
||||
* macOS / BSD: SO_REUSEPORT and thread-per-core I/O.
|
||||
* Linux: SO_REUSEPORT and thread-per-core with `recvmmsg` and `sendmmsg` (and io_uring possibly in the future)
|
||||
* Windows: TBD
|
||||
|
||||
It's designed for use with ZeroTier but can be used by other projects as well. The `InetAddress` class from the ZeroTier common utilities crate is used instead of the usual `SocketAddr` as it can easily be cast to/from the low-level OS `sockaddr` structures, but it implements into/from traits for `SocketAddr` and friends.
|
||||
@@ -0,0 +1,16 @@
|
||||
#unstable_features = true
|
||||
max_width = 120
|
||||
#use_small_heuristics = "Max"
|
||||
edition = "2021"
|
||||
#empty_item_single_line = true
|
||||
newline_style = "Unix"
|
||||
struct_lit_width = 60
|
||||
tab_spaces = 4
|
||||
use_small_heuristics = "Default"
|
||||
#fn_single_line = true
|
||||
#hex_literal_case = "Lower"
|
||||
#merge_imports = false
|
||||
group_imports = "StdExternalCrate"
|
||||
single_line_if_else_max_width = 0
|
||||
use_try_shorthand = true
|
||||
imports_granularity = "Module"
|
||||
+463
@@ -0,0 +1,463 @@
|
||||
mod os_socket;
|
||||
|
||||
use std::collections::HashSet;
|
||||
use std::error::Error;
|
||||
use std::mem::size_of;
|
||||
use std::os::fd::RawFd;
|
||||
use std::pin::Pin;
|
||||
use std::sync::atomic::{AtomicUsize, Ordering};
|
||||
use std::sync::{Arc, Mutex, Weak};
|
||||
use std::thread::JoinHandle;
|
||||
use std::time::Duration;
|
||||
|
||||
#[allow(unused_imports)]
|
||||
use num_traits::AsPrimitive;
|
||||
|
||||
use polling::{Event, Poller};
|
||||
use zerotier_common_utils::inetaddress::InetAddress;
|
||||
|
||||
/// Trait to be implemented to handle packets read from UDP sockets.
|
||||
pub trait PacketHandler: Send + Sync + Sized + 'static {
|
||||
/// Data type for buffers passed in and out of the UDP I/O engine.
|
||||
///
|
||||
/// This is commonly Box<[u8]> or similar. It should be a thin pointer and not a whole literal
|
||||
/// buffer to avoid a lot of memory copying.
|
||||
type Buffer: AsMut<[u8]> + Send;
|
||||
|
||||
/// A cloneable reference to the handler, typically Arc<...>.
|
||||
type Ref: AsRef<Self> + Send + Clone;
|
||||
|
||||
/// Data type for arbitrary data to attach to a socket.
|
||||
///
|
||||
/// It must be safe an efficient to clone this since a copy will be distributed to each
|
||||
/// worker thread. This would typically be a small bit of static data or an Arc<> or Weak<>.
|
||||
///
|
||||
/// Use () if this is not needed.
|
||||
type SocketApplicationData: Send + Clone;
|
||||
|
||||
/// Obtain a buffer to receive a new packet.
|
||||
///
|
||||
/// The buffer's contents do not need to be zeroed prior to being used. Its as_mut() function
|
||||
/// must return a slice large enough to receive a UDP packet or packets will be lost.
|
||||
fn get_buffer(&self) -> Self::Buffer;
|
||||
|
||||
/// Called by the engine to return a buffer after a send completes (or fails).
|
||||
///
|
||||
/// This isn't called after on_udp_packet() since that handler takes ownership of the buffer.
|
||||
/// If you are doing pooling you could instead call this internally inside on_udp_packet when
|
||||
/// processing is complete.
|
||||
///
|
||||
/// The default implementation is a no-op. Override if needed to e.g. return buffers to a pool.
|
||||
#[allow(unused_variables)]
|
||||
fn return_buffer(&self, buffer: Self::Buffer) {}
|
||||
|
||||
/// Called whan a UDP packet is received.
|
||||
///
|
||||
/// This is called directly (and concurrently) from the actual I/O thread(s) internal
|
||||
/// to the engine. It therefore should never do anything time consuming unless you are
|
||||
/// okay with blocking engine threads. Queues or channels can be used to send packets
|
||||
/// elsewhere for processing. This also works for interoperability with async code.
|
||||
fn on_udp_packet(&self, socket: &UdpSocket<Self>, remote_address: &InetAddress, data: Self::Buffer, len: usize);
|
||||
}
|
||||
|
||||
/// Fast UDP I/O engine.
|
||||
pub struct Engine<H: PacketHandler> {
|
||||
threads: Vec<Arc<EngineThread<H>>>,
|
||||
bound: Mutex<HashSet<InetAddress>>,
|
||||
}
|
||||
|
||||
/// Bound UDP socket handle.
|
||||
///
|
||||
/// UdpSocket doesn't implement Clone because the socket returned from bind() is meant to
|
||||
/// uniquely represent the socket in the application. Shadow socket instances are also created
|
||||
/// internally to supply each thread with one to give to on_udp_packet() to send packets within
|
||||
/// a receive handler, but these are not "canonical" and cloning them would create confusion.
|
||||
///
|
||||
/// Wrapping the returned socket in Rc<> or Arc<> is fine if you want auto-GC inside your
|
||||
/// application.
|
||||
pub struct UdpSocket<H: PacketHandler> {
|
||||
fd: RawFd,
|
||||
|
||||
/// Unique internal ID (not a file descriptor) for this socket.
|
||||
pub id: usize,
|
||||
/// Local address to which this socket is bound.
|
||||
pub local_address: InetAddress,
|
||||
/// Handler supplied when opening this socket.
|
||||
pub handler: H::Ref,
|
||||
/// Arbitrary application data attached to socket.
|
||||
pub data: H::SocketApplicationData,
|
||||
}
|
||||
|
||||
/// Commands that can be sent to worker threads.
|
||||
enum ThreadCommand<H: PacketHandler> {
|
||||
Open(UdpSocket<H>),
|
||||
Close(usize),
|
||||
Shutdown,
|
||||
}
|
||||
|
||||
/// State information for each worker thread.
|
||||
struct EngineThread<H: PacketHandler> {
|
||||
poller: Poller,
|
||||
commands: Mutex<Vec<ThreadCommand<H>>>,
|
||||
thread: JoinHandle<()>,
|
||||
}
|
||||
|
||||
impl<H: PacketHandler> Engine<H> {
|
||||
/// Create a new engine.
|
||||
pub fn new() -> Self {
|
||||
let wait_for_arc_init = |self_ref: Weak<EngineThread<H>>| loop {
|
||||
if let Some(self_ref) = self_ref.upgrade() {
|
||||
self_ref.thread_main();
|
||||
break;
|
||||
} else {
|
||||
// wait for self_ref to be fully constructed by Arc::new_cyclic()
|
||||
std::thread::sleep(Duration::from_millis(1));
|
||||
}
|
||||
};
|
||||
Self {
|
||||
threads: if let Some(core_ids) = core_affinity::get_core_ids() {
|
||||
assert!(core_ids.len() > 0);
|
||||
core_ids
|
||||
.into_iter()
|
||||
.map(|core_id| {
|
||||
Arc::new_cyclic(|self_ref: &Weak<EngineThread<H>>| {
|
||||
let self_ref = self_ref.clone();
|
||||
EngineThread {
|
||||
poller: Poller::new().unwrap(),
|
||||
commands: Mutex::new(Vec::with_capacity(8)),
|
||||
thread: std::thread::spawn(move || {
|
||||
core_affinity::set_for_current(core_id);
|
||||
wait_for_arc_init(self_ref);
|
||||
}),
|
||||
}
|
||||
})
|
||||
})
|
||||
.collect()
|
||||
} else {
|
||||
let hw_par = std::thread::available_parallelism().unwrap().get();
|
||||
let mut threads = Vec::with_capacity(hw_par);
|
||||
for _ in 0..hw_par {
|
||||
threads.push(Arc::new_cyclic(|self_ref: &Weak<EngineThread<H>>| {
|
||||
let self_ref = self_ref.clone();
|
||||
EngineThread {
|
||||
poller: Poller::new().unwrap(),
|
||||
commands: Mutex::new(Vec::with_capacity(8)),
|
||||
thread: std::thread::spawn(move || wait_for_arc_init(self_ref)),
|
||||
}
|
||||
}))
|
||||
}
|
||||
threads
|
||||
},
|
||||
bound: Mutex::new(HashSet::new()),
|
||||
}
|
||||
}
|
||||
|
||||
/// Bind a UDP socket to a local address.
|
||||
///
|
||||
/// The returned UdpSocket must be closed explicitly with close() when the application is
|
||||
/// finished with it.
|
||||
///
|
||||
/// Packets are sent via the returned socket object. When packets are received the handler
|
||||
/// will be called directly.
|
||||
///
|
||||
/// * `bind_address`: Local IP address and port
|
||||
/// * `bind_to_device`: If specified, bind to a network interface (platform-specific, mainly Linux)
|
||||
/// * `v6only`: If true IPv6 sockets bound to ::0 should only receive IPv6 datagrams.
|
||||
/// * `handler`: Reference to handler instance for packets read from this socket.
|
||||
/// * `data`: Arbitrary data to attach to socket.
|
||||
pub fn bind(
|
||||
&self,
|
||||
bind_address: &InetAddress,
|
||||
bind_to_device: Option<&str>,
|
||||
v6only: bool,
|
||||
handler: H::Ref,
|
||||
data: H::SocketApplicationData,
|
||||
) -> Result<UdpSocket<H>, Box<dyn Error>> {
|
||||
// Counter used to assign each UdpSocket an internally unique ID.
|
||||
static ID_COUNTER: AtomicUsize = AtomicUsize::new(1);
|
||||
|
||||
let mut bound = self.bound.lock().unwrap(); // also serializes calls to bind()
|
||||
if bound.contains(bind_address) {
|
||||
return Err(Box::new(std::io::Error::new(
|
||||
std::io::ErrorKind::AddrNotAvailable,
|
||||
"already bound to this address",
|
||||
)));
|
||||
}
|
||||
|
||||
let mut fds = Vec::with_capacity(self.threads.len());
|
||||
for _ in 0..self.threads.len() {
|
||||
match unsafe { crate::os_socket::bind_udp(bind_address, bind_to_device, true, v6only, true) } {
|
||||
Ok(fd) => fds.push(fd),
|
||||
Err(desc) => {
|
||||
for fd in fds.iter() {
|
||||
unsafe { libc::close(*fd) };
|
||||
}
|
||||
return Err(Box::new(std::io::Error::new(
|
||||
std::io::ErrorKind::AddrNotAvailable,
|
||||
desc,
|
||||
)));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
let id = ID_COUNTER.fetch_add(1, Ordering::SeqCst);
|
||||
bound.insert(bind_address.clone());
|
||||
|
||||
for (t, fd) in self.threads.iter().zip(fds.iter()) {
|
||||
t.commands.lock().unwrap().push(ThreadCommand::Open(UdpSocket {
|
||||
fd: *fd,
|
||||
id,
|
||||
local_address: bind_address.clone(),
|
||||
handler: handler.clone(),
|
||||
data: data.clone(),
|
||||
}));
|
||||
let _ = t.poller.notify();
|
||||
}
|
||||
|
||||
Ok(UdpSocket {
|
||||
fd: *fds.first().unwrap(),
|
||||
id,
|
||||
local_address: bind_address.clone(),
|
||||
handler,
|
||||
data,
|
||||
})
|
||||
}
|
||||
|
||||
/// Close a socket.
|
||||
///
|
||||
/// Note that it's possible for a few packets to continue to be received on this socket
|
||||
/// until all threads have had a chance to receive a close command for it.
|
||||
pub fn close(&self, socket: UdpSocket<H>) {
|
||||
if self.bound.lock().unwrap().remove(&socket.local_address) {
|
||||
for t in self.threads.iter() {
|
||||
t.commands.lock().unwrap().push(ThreadCommand::Close(socket.id));
|
||||
let _ = t.poller.notify();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<H: PacketHandler> Drop for Engine<H> {
|
||||
fn drop(&mut self) {
|
||||
for t in self.threads.drain(..) {
|
||||
t.commands.lock().unwrap().insert(0, ThreadCommand::Shutdown); // tell thread to exit
|
||||
loop {
|
||||
let _ = t.poller.notify();
|
||||
if t.thread.is_finished() {
|
||||
break;
|
||||
} else {
|
||||
std::thread::sleep(Duration::from_millis(1));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<H: PacketHandler> EngineThread<H> {
|
||||
fn thread_main(&self) {
|
||||
let mut events = Vec::with_capacity(16);
|
||||
let mut commands = Vec::with_capacity(16);
|
||||
let mut sockets: Vec<Pin<Box<UdpSocket<H>>>> = Vec::with_capacity(16);
|
||||
let mut from_address = InetAddress::new();
|
||||
loop {
|
||||
if self.poller.wait(&mut events, None).is_err() {
|
||||
panic!("polling failed");
|
||||
}
|
||||
|
||||
for ev in events.iter() {
|
||||
match ev {
|
||||
Event { key, readable, writable: _writable } => {
|
||||
if *readable {
|
||||
let d: &UdpSocket<H> = unsafe { &*(*key as *const UdpSocket<H>) };
|
||||
let handler = d.handler.as_ref();
|
||||
loop {
|
||||
let mut buf = handler.get_buffer();
|
||||
let buf_inner = buf.as_mut();
|
||||
let mut addrlen = size_of::<InetAddress>() as libc::socklen_t;
|
||||
let packet_size = unsafe {
|
||||
libc::recvfrom(
|
||||
d.fd,
|
||||
buf_inner.as_mut_ptr().cast(),
|
||||
buf_inner.len().as_(),
|
||||
0,
|
||||
(&mut from_address as *mut InetAddress).cast(),
|
||||
(&mut addrlen as *mut libc::socklen_t).cast(),
|
||||
) as isize
|
||||
};
|
||||
if packet_size >= 0 {
|
||||
handler.on_udp_packet(d, &from_address, buf, packet_size as usize);
|
||||
} else {
|
||||
break;
|
||||
}
|
||||
}
|
||||
let _ = self
|
||||
.poller
|
||||
.modify(d.fd, Event { key: *key, readable: true, writable: false });
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
events.clear();
|
||||
|
||||
std::mem::swap(self.commands.lock().unwrap().as_mut(), &mut commands);
|
||||
for command in commands.drain(..) {
|
||||
match command {
|
||||
ThreadCommand::Open(socket) => {
|
||||
let fd = socket.fd;
|
||||
sockets.push(Box::pin(socket));
|
||||
self.poller
|
||||
.add(
|
||||
fd,
|
||||
Event {
|
||||
key: (&*sockets.last().unwrap().as_ref() as *const UdpSocket<H>) as usize,
|
||||
readable: true,
|
||||
writable: false,
|
||||
},
|
||||
)
|
||||
.unwrap();
|
||||
}
|
||||
ThreadCommand::Close(id) => sockets.retain(|d| {
|
||||
if d.id == id {
|
||||
self.poller.delete(d.fd).unwrap();
|
||||
unsafe { libc::close(d.fd) };
|
||||
false
|
||||
} else {
|
||||
true
|
||||
}
|
||||
}),
|
||||
ThreadCommand::Shutdown => {
|
||||
for d in sockets.iter() {
|
||||
unsafe { libc::close(d.fd) };
|
||||
}
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<H: PacketHandler> UdpSocket<H> {
|
||||
/// Send a packet over this socket.
|
||||
///
|
||||
/// This doesn't provide a return value because (1) UDP does not guarantee delivery anyway
|
||||
/// and (2) on some platforms a queue might be used to batch sends and so no feedback will
|
||||
/// be immediately available.
|
||||
///
|
||||
/// Attempting to send on a socket after the engine that created it has been dropped will
|
||||
/// either silently fail or panic depending on the implementation.
|
||||
#[inline]
|
||||
pub fn send(&self, dest: &InetAddress, mut data: H::Buffer, len: usize) {
|
||||
// Basic implementation for most platforms.
|
||||
unsafe {
|
||||
libc::sendto(
|
||||
self.fd,
|
||||
data.as_mut().as_ptr().cast(),
|
||||
len.as_(),
|
||||
0,
|
||||
(dest as *const InetAddress).cast(),
|
||||
size_of::<InetAddress>().as_(),
|
||||
);
|
||||
self.handler.as_ref().return_buffer(data);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::*;
|
||||
use std::sync::atomic::AtomicU64;
|
||||
|
||||
#[derive(Default)]
|
||||
struct TestHandler {
|
||||
pool: Mutex<Vec<Box<[u8]>>>,
|
||||
received: AtomicU64,
|
||||
echo: bool,
|
||||
}
|
||||
|
||||
impl PacketHandler for TestHandler {
|
||||
type Buffer = Box<[u8]>;
|
||||
type Ref = Arc<Self>;
|
||||
type SocketApplicationData = ();
|
||||
|
||||
fn get_buffer(&self) -> Self::Buffer {
|
||||
let mut pool = self.pool.lock().unwrap();
|
||||
if pool.is_empty() {
|
||||
drop(pool);
|
||||
let mut v = Vec::new();
|
||||
v.resize(2048, 0);
|
||||
v.into_boxed_slice()
|
||||
} else {
|
||||
pool.pop().unwrap()
|
||||
}
|
||||
}
|
||||
|
||||
fn return_buffer(&self, buffer: Self::Buffer) {
|
||||
self.pool.lock().unwrap().push(buffer);
|
||||
}
|
||||
|
||||
fn on_udp_packet(
|
||||
&self,
|
||||
socket: &UdpSocket<Self>,
|
||||
remote_address: &InetAddress,
|
||||
data: Self::Buffer,
|
||||
len: usize,
|
||||
) {
|
||||
self.received.fetch_add(len as u64, Ordering::SeqCst);
|
||||
if self.echo {
|
||||
socket.send(remote_address, data, len);
|
||||
//println!("echo! {} {}", len, self.received.load(Ordering::Relaxed));
|
||||
} else {
|
||||
self.return_buffer(data);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn loopback() {
|
||||
let eng = Engine::<TestHandler>::new();
|
||||
|
||||
let sender_handler = Arc::new(TestHandler {
|
||||
pool: Mutex::new(Vec::new()),
|
||||
received: AtomicU64::new(0),
|
||||
echo: false,
|
||||
});
|
||||
let sender = eng
|
||||
.bind(
|
||||
&InetAddress::from_ip_port(&[127, 0, 0, 1], 11111),
|
||||
None,
|
||||
true,
|
||||
sender_handler.clone(),
|
||||
(),
|
||||
)
|
||||
.unwrap();
|
||||
|
||||
let receiver_handler = Arc::new(TestHandler {
|
||||
pool: Mutex::new(Vec::new()),
|
||||
received: AtomicU64::new(0),
|
||||
echo: true,
|
||||
});
|
||||
let sendto_addr = InetAddress::from_ip_port(&[127, 0, 0, 1], 11112);
|
||||
let _receiver = eng
|
||||
.bind(&sendto_addr, None, true, receiver_handler.clone(), ())
|
||||
.unwrap();
|
||||
|
||||
const PACKET_COUNT: usize = 1024;
|
||||
for _ in 0..PACKET_COUNT {
|
||||
let mut b = sender_handler.get_buffer();
|
||||
b.as_mut().fill(1);
|
||||
sender.send(&sendto_addr, b, 1024);
|
||||
}
|
||||
|
||||
for _ in 0..5000 {
|
||||
if sender_handler.received.load(Ordering::Relaxed) == (PACKET_COUNT * 1024) as u64
|
||||
&& receiver_handler.received.load(Ordering::Relaxed) == (PACKET_COUNT * 1024) as u64
|
||||
{
|
||||
return;
|
||||
} else {
|
||||
std::thread::sleep(Duration::from_millis(1));
|
||||
}
|
||||
}
|
||||
panic!("receive timed out");
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,188 @@
|
||||
#[allow(unused_imports)]
|
||||
use num_traits::AsPrimitive;
|
||||
|
||||
use zerotier_common_utils::inetaddress::InetAddress;
|
||||
|
||||
#[allow(unused)]
|
||||
#[cfg(unix)]
|
||||
pub(crate) unsafe fn bind_udp(
|
||||
address: &InetAddress,
|
||||
bind_to_device: Option<&str>,
|
||||
reuseport: bool,
|
||||
v6only: bool,
|
||||
nonblock: bool,
|
||||
) -> Result<i32, &'static str> {
|
||||
use libc::*;
|
||||
use zerotier_common_utils::inetaddress::InetAddress;
|
||||
|
||||
let mut setsockopt_results: c_int = 0;
|
||||
let mut fl;
|
||||
|
||||
let (af, sa_len) = if address.is_ipv4() {
|
||||
(AF_INET, std::mem::size_of::<sockaddr_in>().as_())
|
||||
} else if address.is_ipv6() {
|
||||
(AF_INET6, std::mem::size_of::<sockaddr_in6>().as_())
|
||||
} else {
|
||||
return Err("unrecognized address family");
|
||||
};
|
||||
|
||||
let s = socket(af.as_(), SOCK_DGRAM, 0);
|
||||
if s <= 0 {
|
||||
return Err("unable to create new UDP socket");
|
||||
}
|
||||
|
||||
if nonblock {
|
||||
fcntl(s, F_SETFL, O_NONBLOCK);
|
||||
}
|
||||
|
||||
/*
|
||||
let mut timeo: timeval = std::mem::zeroed();
|
||||
timeo.tv_sec = SOCKET_RECV_TIMEOUT_SECONDS.as_();
|
||||
timeo.tv_usec = 0;
|
||||
setsockopt_results |= setsockopt(
|
||||
s,
|
||||
SOL_SOCKET.as_(),
|
||||
SO_RCVTIMEO.as_(),
|
||||
(&mut timeo as *mut timeval).cast(),
|
||||
std::mem::size_of::<timeval>().as_(),
|
||||
);
|
||||
*/
|
||||
|
||||
if reuseport {
|
||||
fl = 1;
|
||||
if setsockopt(
|
||||
s,
|
||||
SOL_SOCKET.as_(),
|
||||
SO_REUSEPORT.as_(),
|
||||
(&mut fl as *mut c_int).cast(),
|
||||
std::mem::size_of::<c_int>().as_(),
|
||||
) != 0
|
||||
{
|
||||
close(s);
|
||||
return Err("unable to set SO_REUSEPORT");
|
||||
}
|
||||
}
|
||||
|
||||
fl = 1;
|
||||
setsockopt(
|
||||
s,
|
||||
SOL_SOCKET.as_(),
|
||||
SO_BROADCAST.as_(),
|
||||
(&mut fl as *mut c_int).cast(),
|
||||
std::mem::size_of::<c_int>().as_(),
|
||||
);
|
||||
|
||||
if af == AF_INET6 {
|
||||
fl = if v6only {
|
||||
1
|
||||
} else {
|
||||
0
|
||||
};
|
||||
if setsockopt(
|
||||
s,
|
||||
IPPROTO_IPV6.as_(),
|
||||
IPV6_V6ONLY.as_(),
|
||||
(&mut fl as *mut c_int).cast(),
|
||||
std::mem::size_of::<c_int>().as_(),
|
||||
) != 0
|
||||
{
|
||||
close(s);
|
||||
return Err("unable to set V6ONLY");
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(target_os = "linux")]
|
||||
{
|
||||
if let Some(bind_to_device) = bind_to_device {
|
||||
if !bind_to_device.is_empty() {
|
||||
let _ = std::ffi::CString::new(bind_to_device).map(|dn| {
|
||||
let dnb = dn.as_bytes_with_nul();
|
||||
let _ = setsockopt(
|
||||
s.as_(),
|
||||
SOL_SOCKET.as_(),
|
||||
SO_BINDTODEVICE.as_(),
|
||||
dnb.as_ptr().cast(),
|
||||
(dnb.len() - 1).as_(),
|
||||
);
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if setsockopt_results != 0 {
|
||||
close(s);
|
||||
return Err("setsockopt() failed");
|
||||
}
|
||||
|
||||
if af == AF_INET {
|
||||
#[cfg(not(target_os = "linux"))]
|
||||
{
|
||||
fl = 0;
|
||||
setsockopt(
|
||||
s,
|
||||
IPPROTO_IP.as_(),
|
||||
IP_DONTFRAG.as_(),
|
||||
(&mut fl as *mut c_int).cast(),
|
||||
std::mem::size_of::<c_int>().as_(),
|
||||
);
|
||||
}
|
||||
#[cfg(target_os = "linux")]
|
||||
{
|
||||
fl = IP_PMTUDISC_DONT as c_int;
|
||||
setsockopt(
|
||||
s,
|
||||
IPPROTO_IP.as_(),
|
||||
IP_MTU_DISCOVER.as_(),
|
||||
(&mut fl as *mut c_int).cast(),
|
||||
std::mem::size_of::<c_int>().as_(),
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
if af == AF_INET6 {
|
||||
fl = 0;
|
||||
setsockopt(
|
||||
s,
|
||||
IPPROTO_IPV6.as_(),
|
||||
IPV6_DONTFRAG.as_(),
|
||||
(&mut fl as *mut c_int).cast(),
|
||||
std::mem::size_of::<c_int>().as_(),
|
||||
);
|
||||
}
|
||||
|
||||
fl = 1048576;
|
||||
while fl >= 65536 {
|
||||
if setsockopt(
|
||||
s,
|
||||
SOL_SOCKET.as_(),
|
||||
SO_RCVBUF.as_(),
|
||||
(&mut fl as *mut c_int).cast(),
|
||||
std::mem::size_of::<c_int>().as_(),
|
||||
) == 0
|
||||
{
|
||||
break;
|
||||
}
|
||||
fl -= 65536;
|
||||
}
|
||||
fl = 1048576;
|
||||
while fl >= 65536 {
|
||||
if setsockopt(
|
||||
s,
|
||||
SOL_SOCKET.as_(),
|
||||
SO_SNDBUF.as_(),
|
||||
(&mut fl as *mut c_int).cast(),
|
||||
std::mem::size_of::<c_int>().as_(),
|
||||
) == 0
|
||||
{
|
||||
break;
|
||||
}
|
||||
fl -= 65536;
|
||||
}
|
||||
|
||||
if bind(s, (address as *const InetAddress).cast(), sa_len) != 0 {
|
||||
close(s);
|
||||
return Err("bind to address failed");
|
||||
}
|
||||
|
||||
Ok(s as i32)
|
||||
}
|
||||
Reference in New Issue
Block a user