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5b555ee5aa
- removes all the llarp_ev_* functions, replacing with methods/classes/functions in the llarp
namespace.
- banish ev/ev.h to the void
- Passes various things by const lvalue ref, especially shared_ptr's that don't need to be copied
(to avoid an atomic refcount increment/decrement).
- Add a llarp::UDPHandle abstract class for UDP handling
- Removes the UDP tick handler; code that needs tick can just do a separate handler on the event
loop outside the UDP socket.
- Adds an "OwnedBuffer" which owns its own memory but is implicitly convertible to a llarp_buffer_t.
This is mostly needed to take over ownership of buffers from uvw without copying them as,
currently, uvw does its own allocation (pending some open upstream issues/PRs).
- Logic:
- add `make_caller`/`call_forever`/`call_every` utility functions to abstract Call wrapping and
dependent timed tasks.
- Add inLogicThread() so that code can tell its inside the logic thread (typically for
debugging assertions).
- get rid of janky integer returns and dealing with cancellations on call_later: the other methods
added here and the event loop code remove the need for them.
- Event loop:
- redo everything with uvw instead of libuv
- rename EventLoopWakeup::Wakeup to EventLoopWakeup::Trigger to better reflect what it does.
- add EventLoopRepeater for repeated events, and replace the code that reschedules itself every
time it is called with a repeater.
- Split up `EventLoop::run()` into a non-virtual base method and abstract `run_loop()` methods;
the base method does a couple extra setup/teardown things that don't need to be in the derived class.
- udp_listen is replaced with ev->udp(...) which returns a new UDPHandle object rather that
needing gross C-style-but-not-actually-C-compatible structs.
- Remove unused register_poll_fd_(un)readable
- Use shared_ptr for EventLoopWakeup rather than returning a raw pointer; uvw lets us not have to
worry about having the event loop class maintain ownership of it.
- Add factory EventLoop::create() function to create a default (uvw-based) event loop (previously
this was one of the llarp_ev_blahblah unnamespaced functions).
- ev_libuv: this is mostly rewritten; all of the glue code/structs, in particular, are gone as
they are no longer needed with uvw.
- DNS:
- Rename DnsHandler to DnsInterceptor to better describe what it does (this is the code that
intercepts all DNS to the tun IP range for Android).
- endpoint:
- remove unused "isolated network" code
- remove distinct (but actually always the same) variables for router/endpoint logic objects
- llarp_buffer_t
- make constructors type-safe against being called with points to non-size-1 values
- tun packet reading:
- read all available packets off the device/file descriptor; previously we were reading one packet
at a time then returning to the event loop to poll again.
- ReadNextPacket() now returns a 0-size packet if the read would block (so that we can implement
the previous point).
- ReadNextPacket() now throws on I/O error
- Miscellaneous code cleanups/simplifications
42 lines
1.4 KiB
C++
42 lines
1.4 KiB
C++
#include "ev.hpp"
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#include "../util/buffer.hpp"
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namespace llarp
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{
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// Base type for UDP handling; constructed via EventLoop::udp().
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struct UDPHandle
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{
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using ReceiveFunc = EventLoop::UDPReceiveFunc;
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// Starts listening for incoming UDP packets on the given address. Returns true on success,
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// false if the address could not be bound. If you send without calling this first then the
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// socket will bind to a random high port on 0.0.0.0 (the "all addresses" address).
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virtual bool
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listen(const SockAddr& addr) = 0;
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// Sends a packet to the given recipient, immediately. Returns true if the send succeeded,
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// false it could not be performed (either because of error, or because it would have blocked).
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// If listen hasn't been called then a random IP/port will be used.
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virtual bool
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send(const SockAddr& dest, const llarp_buffer_t& buf) = 0;
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// Closes the listening UDP socket (if opened); this is typically called (automatically) during
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// destruction. Does nothing if the UDP socket is already closed.
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virtual void
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close() = 0;
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// Base class destructor
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virtual ~UDPHandle() = default;
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protected:
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explicit UDPHandle(ReceiveFunc on_recv) : on_recv{std::move(on_recv)}
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{
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// It makes no sense at all to use this with a null receive function:
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assert(this->on_recv);
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}
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// Callback to invoke when data is received
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ReceiveFunc on_recv;
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};
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} // namespace llarp
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