two version of R2R are here HEAD master

1 files changed, 295 insertions, 0 deletions

diff --git a/.venv/lib/python3.12/site-packages/dns/quic/_sync.py b/.venv/lib/python3.12/site-packages/dns/quic/_sync.py
new file mode 100644
index 00000000..473d1f48
--- /dev/null
+++ b/.venv/lib/python3.12/site-packages/dns/quic/_sync.py
@@ -0,0 +1,295 @@
+# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
+
+import selectors
+import socket
+import ssl
+import struct
+import threading
+import time
+
+import aioquic.quic.configuration  # type: ignore
+import aioquic.quic.connection  # type: ignore
+import aioquic.quic.events  # type: ignore
+
+import dns.exception
+import dns.inet
+from dns.quic._common import (
+    QUIC_MAX_DATAGRAM,
+    BaseQuicConnection,
+    BaseQuicManager,
+    BaseQuicStream,
+    UnexpectedEOF,
+)
+
+# Function used to create a socket.  Can be overridden if needed in special
+# situations.
+socket_factory = socket.socket
+
+
+class SyncQuicStream(BaseQuicStream):
+    def __init__(self, connection, stream_id):
+        super().__init__(connection, stream_id)
+        self._wake_up = threading.Condition()
+        self._lock = threading.Lock()
+
+    def wait_for(self, amount, expiration):
+        while True:
+            timeout = self._timeout_from_expiration(expiration)
+            with self._lock:
+                if self._buffer.have(amount):
+                    return
+                self._expecting = amount
+            with self._wake_up:
+                if not self._wake_up.wait(timeout):
+                    raise dns.exception.Timeout
+            self._expecting = 0
+
+    def wait_for_end(self, expiration):
+        while True:
+            timeout = self._timeout_from_expiration(expiration)
+            with self._lock:
+                if self._buffer.seen_end():
+                    return
+            with self._wake_up:
+                if not self._wake_up.wait(timeout):
+                    raise dns.exception.Timeout
+
+    def receive(self, timeout=None):
+        expiration = self._expiration_from_timeout(timeout)
+        if self._connection.is_h3():
+            self.wait_for_end(expiration)
+            with self._lock:
+                return self._buffer.get_all()
+        else:
+            self.wait_for(2, expiration)
+            with self._lock:
+                (size,) = struct.unpack("!H", self._buffer.get(2))
+            self.wait_for(size, expiration)
+            with self._lock:
+                return self._buffer.get(size)
+
+    def send(self, datagram, is_end=False):
+        data = self._encapsulate(datagram)
+        self._connection.write(self._stream_id, data, is_end)
+
+    def _add_input(self, data, is_end):
+        if self._common_add_input(data, is_end):
+            with self._wake_up:
+                self._wake_up.notify()
+
+    def close(self):
+        with self._lock:
+            self._close()
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.close()
+        with self._wake_up:
+            self._wake_up.notify()
+        return False
+
+
+class SyncQuicConnection(BaseQuicConnection):
+    def __init__(self, connection, address, port, source, source_port, manager):
+        super().__init__(connection, address, port, source, source_port, manager)
+        self._socket = socket_factory(self._af, socket.SOCK_DGRAM, 0)
+        if self._source is not None:
+            try:
+                self._socket.bind(
+                    dns.inet.low_level_address_tuple(self._source, self._af)
+                )
+            except Exception:
+                self._socket.close()
+                raise
+        self._socket.connect(self._peer)
+        (self._send_wakeup, self._receive_wakeup) = socket.socketpair()
+        self._receive_wakeup.setblocking(False)
+        self._socket.setblocking(False)
+        self._handshake_complete = threading.Event()
+        self._worker_thread = None
+        self._lock = threading.Lock()
+
+    def _read(self):
+        count = 0
+        while count < 10:
+            count += 1
+            try:
+                datagram = self._socket.recv(QUIC_MAX_DATAGRAM)
+            except BlockingIOError:
+                return
+            with self._lock:
+                self._connection.receive_datagram(datagram, self._peer, time.time())
+
+    def _drain_wakeup(self):
+        while True:
+            try:
+                self._receive_wakeup.recv(32)
+            except BlockingIOError:
+                return
+
+    def _worker(self):
+        try:
+            sel = selectors.DefaultSelector()
+            sel.register(self._socket, selectors.EVENT_READ, self._read)
+            sel.register(self._receive_wakeup, selectors.EVENT_READ, self._drain_wakeup)
+            while not self._done:
+                (expiration, interval) = self._get_timer_values(False)
+                items = sel.select(interval)
+                for key, _ in items:
+                    key.data()
+                with self._lock:
+                    self._handle_timer(expiration)
+                self._handle_events()
+                with self._lock:
+                    datagrams = self._connection.datagrams_to_send(time.time())
+                for datagram, _ in datagrams:
+                    try:
+                        self._socket.send(datagram)
+                    except BlockingIOError:
+                        # we let QUIC handle any lossage
+                        pass
+        finally:
+            with self._lock:
+                self._done = True
+            self._socket.close()
+            # Ensure anyone waiting for this gets woken up.
+            self._handshake_complete.set()
+
+    def _handle_events(self):
+        while True:
+            with self._lock:
+                event = self._connection.next_event()
+            if event is None:
+                return
+            if isinstance(event, aioquic.quic.events.StreamDataReceived):
+                if self.is_h3():
+                    h3_events = self._h3_conn.handle_event(event)
+                    for h3_event in h3_events:
+                        if isinstance(h3_event, aioquic.h3.events.HeadersReceived):
+                            with self._lock:
+                                stream = self._streams.get(event.stream_id)
+                            if stream:
+                                if stream._headers is None:
+                                    stream._headers = h3_event.headers
+                                elif stream._trailers is None:
+                                    stream._trailers = h3_event.headers
+                                if h3_event.stream_ended:
+                                    stream._add_input(b"", True)
+                        elif isinstance(h3_event, aioquic.h3.events.DataReceived):
+                            with self._lock:
+                                stream = self._streams.get(event.stream_id)
+                            if stream:
+                                stream._add_input(h3_event.data, h3_event.stream_ended)
+                else:
+                    with self._lock:
+                        stream = self._streams.get(event.stream_id)
+                    if stream:
+                        stream._add_input(event.data, event.end_stream)
+            elif isinstance(event, aioquic.quic.events.HandshakeCompleted):
+                self._handshake_complete.set()
+            elif isinstance(event, aioquic.quic.events.ConnectionTerminated):
+                with self._lock:
+                    self._done = True
+            elif isinstance(event, aioquic.quic.events.StreamReset):
+                with self._lock:
+                    stream = self._streams.get(event.stream_id)
+                if stream:
+                    stream._add_input(b"", True)
+
+    def write(self, stream, data, is_end=False):
+        with self._lock:
+            self._connection.send_stream_data(stream, data, is_end)
+        self._send_wakeup.send(b"\x01")
+
+    def send_headers(self, stream_id, headers, is_end=False):
+        with self._lock:
+            super().send_headers(stream_id, headers, is_end)
+        if is_end:
+            self._send_wakeup.send(b"\x01")
+
+    def send_data(self, stream_id, data, is_end=False):
+        with self._lock:
+            super().send_data(stream_id, data, is_end)
+        if is_end:
+            self._send_wakeup.send(b"\x01")
+
+    def run(self):
+        if self._closed:
+            return
+        self._worker_thread = threading.Thread(target=self._worker)
+        self._worker_thread.start()
+
+    def make_stream(self, timeout=None):
+        if not self._handshake_complete.wait(timeout):
+            raise dns.exception.Timeout
+        with self._lock:
+            if self._done:
+                raise UnexpectedEOF
+            stream_id = self._connection.get_next_available_stream_id(False)
+            stream = SyncQuicStream(self, stream_id)
+            self._streams[stream_id] = stream
+        return stream
+
+    def close_stream(self, stream_id):
+        with self._lock:
+            super().close_stream(stream_id)
+
+    def close(self):
+        with self._lock:
+            if self._closed:
+                return
+            self._manager.closed(self._peer[0], self._peer[1])
+            self._closed = True
+            self._connection.close()
+            self._send_wakeup.send(b"\x01")
+        self._worker_thread.join()
+
+
+class SyncQuicManager(BaseQuicManager):
+    def __init__(
+        self, conf=None, verify_mode=ssl.CERT_REQUIRED, server_name=None, h3=False
+    ):
+        super().__init__(conf, verify_mode, SyncQuicConnection, server_name, h3)
+        self._lock = threading.Lock()
+
+    def connect(
+        self,
+        address,
+        port=853,
+        source=None,
+        source_port=0,
+        want_session_ticket=True,
+        want_token=True,
+    ):
+        with self._lock:
+            (connection, start) = self._connect(
+                address, port, source, source_port, want_session_ticket, want_token
+            )
+            if start:
+                connection.run()
+            return connection
+
+    def closed(self, address, port):
+        with self._lock:
+            super().closed(address, port)
+
+    def save_session_ticket(self, address, port, ticket):
+        with self._lock:
+            super().save_session_ticket(address, port, ticket)
+
+    def save_token(self, address, port, token):
+        with self._lock:
+            super().save_token(address, port, token)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        # Copy the iterator into a list as exiting things will mutate the connections
+        # table.
+        connections = list(self._connections.values())
+        for connection in connections:
+            connection.close()
+        return False