Trying to make full suite pass with uds

Type hint all ctx managers in _ringbuf.py
Remove unnecesary send lock on ring chan sender
Handle EOF on ring chan receiver
Rename ringbuf tests to make it less redundant

default.nix

@@ -10,9 +10,10 @@ pkgs.mkShell {
   inherit nativeBuildInputs;
 
   LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath nativeBuildInputs;
+  TMPDIR = "/tmp";
 
   shellHook = ''
     set -e
-    uv venv .venv --python=3.12
+    uv venv .venv --python=3.11
   '';
 }

examples/service_discovery.py

@@ -9,7 +9,7 @@ async def main(service_name):
     async with tractor.open_nursery() as an:
         await an.start_actor(service_name)
 
-        async with tractor.get_registry('127.0.0.1', 1616) as portal:
+        async with tractor.get_registry() as portal:
             print(f"Arbiter is listening on {portal.channel}")
 
         async with tractor.wait_for_actor(service_name) as sockaddr:

tests/test_discovery.py

@@ -26,7 +26,7 @@ async def test_reg_then_unreg(reg_addr):
         portal = await n.start_actor('actor', enable_modules=[__name__])
         uid = portal.channel.uid
 
-        async with tractor.get_registry(*reg_addr) as aportal:
+        async with tractor.get_registry(reg_addr) as aportal:
             # this local actor should be the arbiter
             assert actor is aportal.actor
 
@@ -160,7 +160,7 @@ async def spawn_and_check_registry(
     async with tractor.open_root_actor(
         registry_addrs=[reg_addr],
     ):
-        async with tractor.get_registry(*reg_addr) as portal:
+        async with tractor.get_registry(reg_addr) as portal:
             # runtime needs to be up to call this
             actor = tractor.current_actor()
 
@@ -300,7 +300,7 @@ async def close_chans_before_nursery(
     async with tractor.open_root_actor(
         registry_addrs=[reg_addr],
     ):
-        async with tractor.get_registry(*reg_addr) as aportal:
+        async with tractor.get_registry(reg_addr) as aportal:
             try:
                 get_reg = partial(unpack_reg, aportal)
 

tests/test_docs_examples.py

@@ -66,6 +66,9 @@ def run_example_in_subproc(
         # due to backpressure!!!
         proc = testdir.popen(
             cmdargs,
+            stdin=subprocess.PIPE,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
             **kwargs,
         )
         assert not proc.returncode
@@ -119,10 +122,14 @@ def test_example(
         code = ex.read()
 
         with run_example_in_subproc(code) as proc:
-            proc.wait()
+            err = None
-            err, _ = proc.stderr.read(), proc.stdout.read()
+            try:
-            # print(f'STDERR: {err}')
+                if not proc.poll():
-            # print(f'STDOUT: {out}')
+                    _, err = proc.communicate(timeout=15)
+
+            except subprocess.TimeoutExpired as e:
+                proc.kill()
+                err = e.stderr
 
             # if we get some gnarly output let's aggregate and raise
             if err:

tests/test_eventfd.py

@@ -0,0 +1,32 @@
+import trio
+import pytest
+from tractor.ipc import (
+    open_eventfd,
+    EFDReadCancelled,
+    EventFD
+)
+
+
+def test_eventfd_read_cancellation():
+    '''
+    Ensure EventFD.read raises EFDReadCancelled if EventFD.close()
+    is called.
+
+    '''
+    fd = open_eventfd()
+
+    async def _read(event: EventFD):
+        with pytest.raises(EFDReadCancelled):
+            await event.read()
+
+    async def main():
+        async with trio.open_nursery() as n:
+            with (
+                EventFD(fd, 'w') as event,
+                trio.fail_after(3)
+            ):
+                n.start_soon(_read, event)
+                await trio.sleep(0.2)
+                event.close()
+
+    trio.run(main)

tests/test_inter_peer_cancellation.py

@@ -871,7 +871,7 @@ async def serve_subactors(
                 )
                 await ipc.send((
                     peer.chan.uid,
-                    peer.chan.raddr,
+                    peer.chan.raddr.unwrap(),
                 ))
 
         print('Spawner exiting spawn serve loop!')

tests/test_local.py

@@ -38,7 +38,7 @@ async def test_self_is_registered_localportal(reg_addr):
     "Verify waiting on the arbiter to register itself using a local portal."
     actor = tractor.current_actor()
     assert actor.is_arbiter
-    async with tractor.get_registry(*reg_addr) as portal:
+    async with tractor.get_registry(reg_addr) as portal:
         assert isinstance(portal, tractor._portal.LocalPortal)
 
         with trio.fail_after(0.2):

tests/test_multi_program.py

@@ -32,7 +32,7 @@ def test_abort_on_sigint(daemon):
 @tractor_test
 async def test_cancel_remote_arbiter(daemon, reg_addr):
     assert not tractor.current_actor().is_arbiter
-    async with tractor.get_registry(*reg_addr) as portal:
+    async with tractor.get_registry(reg_addr) as portal:
         await portal.cancel_actor()
 
     time.sleep(0.1)
@@ -41,7 +41,7 @@ async def test_cancel_remote_arbiter(daemon, reg_addr):
 
     # no arbiter socket should exist
     with pytest.raises(OSError):
-        async with tractor.get_registry(*reg_addr) as portal:
+        async with tractor.get_registry(reg_addr) as portal:
             pass
 
 

tests/test_ringbuf.py

@@ -1,15 +1,21 @@
 import time
+import hashlib
 
 import trio
 import pytest
 import tractor
 from tractor.ipc import (
     open_ringbuf,
+    attach_to_ringbuf_receiver,
+    attach_to_ringbuf_sender,
+    attach_to_ringbuf_stream,
+    attach_to_ringbuf_channel,
     RBToken,
-    RingBuffSender,
-    RingBuffReceiver
 )
-from tractor._testing.samples import generate_sample_messages
+from tractor._testing.samples import (
+    generate_single_byte_msgs,
+    generate_sample_messages
+)
 
 
 @tractor.context
@@ -17,19 +23,27 @@ async def child_read_shm(
     ctx: tractor.Context,
     msg_amount: int,
     token: RBToken,
-    total_bytes: int,
+) -> str:
-) -> None:
+    '''
-    recvd_bytes = 0
+    Sub-actor used in `test_ringbuf`.
-    await ctx.started()
-    start_ts = time.time()
-    async with RingBuffReceiver(token) as receiver:
-        while recvd_bytes < total_bytes:
-            msg = await receiver.receive_some()
-            recvd_bytes += len(msg)
 
-        # make sure we dont hold any memoryviews
+    Attach to a ringbuf and receive all messages until end of stream.
-        # before the ctx manager aclose()
+    Keep track of how many bytes received and also calculate 
-        msg = None
+    sha256 of the whole byte stream.
+
+    Calculate and print performance stats, finally return calculated
+    hash.
+
+    '''
+    await ctx.started()
+    print('reader started')
+    recvd_bytes = 0
+    recvd_hash = hashlib.sha256()
+    start_ts = time.time()
+    async with attach_to_ringbuf_receiver(token) as receiver:
+        async for msg in receiver:
+            recvd_hash.update(msg)
+            recvd_bytes += len(msg)
 
     end_ts = time.time()
     elapsed = end_ts - start_ts
@@ -38,6 +52,9 @@ async def child_read_shm(
     print(f'\n\telapsed ms: {elapsed_ms}')
     print(f'\tmsg/sec: {int(msg_amount / elapsed):,}')
     print(f'\tbytes/sec: {int(recvd_bytes / elapsed):,}')
+    print(f'\treceived bytes: {recvd_bytes:,}')
+
+    return recvd_hash.hexdigest()
 
 
 @tractor.context
@@ -48,16 +65,32 @@ async def child_write_shm(
     rand_max: int,
     token: RBToken,
 ) -> None:
-    msgs, total_bytes = generate_sample_messages(
+    '''
+    Sub-actor used in `test_ringbuf`
+
+    Generate `msg_amount` payloads with
+    `random.randint(rand_min, rand_max)` random bytes at the end,
+    Calculate sha256 hash and send it to parent on `ctx.started`.
+
+    Attach to ringbuf and send all generated messages.
+
+    '''
+    msgs, _total_bytes = generate_sample_messages(
         msg_amount,
         rand_min=rand_min,
         rand_max=rand_max,
     )
-    await ctx.started(total_bytes)
+    print('writer hashing payload...')
-    async with RingBuffSender(token) as sender:
+    sent_hash = hashlib.sha256(b''.join(msgs)).hexdigest()
+    print('writer done hashing.')
+    await ctx.started(sent_hash)
+    print('writer started')
+    async with attach_to_ringbuf_sender(token, cleanup=False) as sender:
         for msg in msgs:
             await sender.send_all(msg)
 
+    print('writer exit')
+
 
 @pytest.mark.parametrize(
     'msg_amount,rand_min,rand_max,buf_size',
@@ -83,19 +116,23 @@ def test_ringbuf(
     rand_max: int,
     buf_size: int
 ):
+    '''
+    - Open a new ring buf on root actor
+    - Open `child_write_shm` ctx in sub-actor which will generate a
+    random payload and send its hash on `ctx.started`, finally sending
+    the payload through the stream.
+    - Open `child_read_shm` ctx in sub-actor which will receive the
+    payload, calculate perf stats and return the hash.
+    - Compare both hashes
+
+    '''
     async def main():
         with open_ringbuf(
             'test_ringbuf',
             buf_size=buf_size
         ) as token:
-            proc_kwargs = {
+            proc_kwargs = {'pass_fds': token.fds}
-                'pass_fds': (token.write_eventfd, token.wrap_eventfd)
-            }
 
-            common_kwargs = {
-                'msg_amount': msg_amount,
-                'token': token,
-            }
             async with tractor.open_nursery() as an:
                 send_p = await an.start_actor(
                     'ring_sender',
@@ -110,17 +147,20 @@ def test_ringbuf(
                 async with (
                     send_p.open_context(
                         child_write_shm,
+                        token=token,
+                        msg_amount=msg_amount,
                         rand_min=rand_min,
                         rand_max=rand_max,
-                        **common_kwargs
+                    ) as (_sctx, sent_hash),
-                    ) as (sctx, total_bytes),
                     recv_p.open_context(
                         child_read_shm,
-                        **common_kwargs,
+                        token=token,
-                        total_bytes=total_bytes,
+                        msg_amount=msg_amount
-                    ) as (sctx, _sent),
+                    ) as (rctx, _sent),
                 ):
-                    await recv_p.result()
+                    recvd_hash = await rctx.result()
+
+                    assert sent_hash == recvd_hash
 
                 await send_p.cancel_actor()
                 await recv_p.cancel_actor()
@@ -134,23 +174,28 @@ async def child_blocked_receiver(
     ctx: tractor.Context,
     token: RBToken
 ):
-    async with RingBuffReceiver(token) as receiver:
+    async with attach_to_ringbuf_receiver(token) as receiver:
         await ctx.started()
         await receiver.receive_some()
 
 
-def test_ring_reader_cancel():
+def test_reader_cancel():
+    '''
+    Test that a receiver blocked on eventfd(2) read responds to
+    cancellation.
+
+    '''
     async def main():
         with open_ringbuf('test_ring_cancel_reader') as token:
             async with (
                 tractor.open_nursery() as an,
-                RingBuffSender(token) as _sender,
+                attach_to_ringbuf_sender(token) as _sender,
             ):
                 recv_p = await an.start_actor(
                     'ring_blocked_receiver',
                     enable_modules=[__name__],
                     proc_kwargs={
-                        'pass_fds': (token.write_eventfd, token.wrap_eventfd)
+                        'pass_fds': token.fds
                     }
                 )
                 async with (
@@ -172,12 +217,17 @@ async def child_blocked_sender(
     ctx: tractor.Context,
     token: RBToken
 ):
-    async with RingBuffSender(token) as sender:
+    async with attach_to_ringbuf_sender(token) as sender:
         await ctx.started()
         await sender.send_all(b'this will wrap')
 
 
-def test_ring_sender_cancel():
+def test_sender_cancel():
+    '''
+    Test that a sender blocked on eventfd(2) read responds to
+    cancellation.
+
+    '''
     async def main():
         with open_ringbuf(
             'test_ring_cancel_sender',
@@ -188,7 +238,7 @@ def test_ring_sender_cancel():
                     'ring_blocked_sender',
                     enable_modules=[__name__],
                     proc_kwargs={
-                        'pass_fds': (token.write_eventfd, token.wrap_eventfd)
+                        'pass_fds': token.fds
                     }
                 )
                 async with (
@@ -203,3 +253,171 @@ def test_ring_sender_cancel():
 
     with pytest.raises(tractor._exceptions.ContextCancelled):
         trio.run(main)
+
+
+def test_receiver_max_bytes():
+    '''
+    Test that RingBuffReceiver.receive_some's max_bytes optional
+    argument works correctly, send a msg of size 100, then
+    force receive of messages with max_bytes == 1, wait until
+    100 of these messages are received, then compare join of
+    msgs with original message
+
+    '''
+    msg = generate_single_byte_msgs(100)
+    msgs = []
+
+    async def main():
+        with open_ringbuf(
+            'test_ringbuf_max_bytes',
+            buf_size=10
+        ) as token:
+            async with (
+                trio.open_nursery() as n,
+                attach_to_ringbuf_sender(token, cleanup=False) as sender,
+                attach_to_ringbuf_receiver(token, cleanup=False) as receiver
+            ):
+                async def _send_and_close():
+                    await sender.send_all(msg)
+                    await sender.aclose()
+
+                n.start_soon(_send_and_close)
+                while len(msgs) < len(msg):
+                    msg_part = await receiver.receive_some(max_bytes=1)
+                    assert len(msg_part) == 1
+                    msgs.append(msg_part)
+
+    trio.run(main)
+    assert msg == b''.join(msgs)
+
+
+def test_stapled_ringbuf():
+    '''
+    Open two ringbufs and give tokens to tasks (swap them such that in/out tokens
+    are inversed on each task) which will open the streams and use trio.StapledStream
+    to have a single bidirectional stream.
+
+    Then take turns to send and receive messages.
+
+    '''
+    msg = generate_single_byte_msgs(100)
+    pair_0_msgs = []
+    pair_1_msgs = []
+
+    pair_0_done = trio.Event()
+    pair_1_done = trio.Event()
+
+    async def pair_0(token_in: RBToken, token_out: RBToken):
+        async with attach_to_ringbuf_stream(
+            token_in,
+            token_out,
+            cleanup_in=False,
+            cleanup_out=False
+        ) as stream:
+            # first turn to send
+            await stream.send_all(msg)
+
+            # second turn to receive
+            while len(pair_0_msgs) != len(msg):
+                _msg = await stream.receive_some(max_bytes=1)
+                pair_0_msgs.append(_msg)
+
+            pair_0_done.set()
+            await pair_1_done.wait()
+
+
+    async def pair_1(token_in: RBToken, token_out: RBToken):
+        async with attach_to_ringbuf_stream(
+            token_in,
+            token_out,
+            cleanup_in=False,
+            cleanup_out=False
+        ) as stream:
+            # first turn to receive
+            while len(pair_1_msgs) != len(msg):
+                _msg = await stream.receive_some(max_bytes=1)
+                pair_1_msgs.append(_msg)
+
+            # second turn to send
+            await stream.send_all(msg)
+
+            pair_1_done.set()
+            await pair_0_done.wait()
+
+
+    async def main():
+        with tractor.ipc.open_ringbuf_pair(
+            'test_stapled_ringbuf'
+        ) as (token_0, token_1):
+            async with trio.open_nursery() as n:
+                n.start_soon(pair_0, token_0, token_1)
+                n.start_soon(pair_1, token_1, token_0)
+
+
+    trio.run(main)
+
+    assert msg == b''.join(pair_0_msgs)
+    assert msg == b''.join(pair_1_msgs)
+
+
+@tractor.context
+async def child_channel_sender(
+    ctx: tractor.Context,
+    msg_amount_min: int,
+    msg_amount_max: int,
+    token_in: RBToken,
+    token_out: RBToken
+):
+    import random
+    msgs, _total_bytes = generate_sample_messages(
+        random.randint(msg_amount_min, msg_amount_max),
+        rand_min=256,
+        rand_max=1024,
+    )
+    async with attach_to_ringbuf_channel(
+        token_in,
+        token_out
+    ) as chan:
+        await ctx.started(msgs)
+
+        for msg in msgs:
+            await chan.send(msg)
+
+
+def test_channel():
+
+    msg_amount_min = 100
+    msg_amount_max = 1000
+
+    async def main():
+        with tractor.ipc.open_ringbuf_pair(
+            'test_ringbuf_transport'
+        ) as (token_0, token_1):
+            async with (
+                attach_to_ringbuf_channel(token_0, token_1) as chan,
+                tractor.open_nursery() as an
+            ):
+                recv_p = await an.start_actor(
+                    'test_ringbuf_transport_sender',
+                    enable_modules=[__name__],
+                    proc_kwargs={
+                        'pass_fds': token_0.fds + token_1.fds
+                    }
+                )
+                async with (
+                    recv_p.open_context(
+                        child_channel_sender,
+                        msg_amount_min=msg_amount_min,
+                        msg_amount_max=msg_amount_max,
+                        token_in=token_1,
+                        token_out=token_0
+                    ) as (ctx, msgs),
+                ):
+                    recv_msgs = []
+                    async for msg in chan:
+                        recv_msgs.append(msg)
+
+                    await recv_p.cancel_actor()
+                    assert recv_msgs == msgs
+
+    trio.run(main)

tests/test_spawning.py

@@ -77,7 +77,7 @@ async def movie_theatre_question():
 async def test_movie_theatre_convo(start_method):
     """The main ``tractor`` routine.
     """
-    async with tractor.open_nursery() as n:
+    async with tractor.open_nursery(debug_mode=True) as n:
 
         portal = await n.start_actor(
             'frank',

tractor/_addr.py

@@ -0,0 +1,310 @@
+# tractor: structured concurrent "actors".
+# Copyright 2018-eternity Tyler Goodlet.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+from __future__ import annotations
+import os
+import tempfile
+from uuid import uuid4
+from typing import (
+    Protocol,
+    ClassVar,
+    TypeVar,
+    Union,
+    Type
+)
+
+import trio
+from trio import socket
+
+
+NamespaceType = TypeVar('NamespaceType')
+AddressType = TypeVar('AddressType')
+StreamType = TypeVar('StreamType')
+ListenerType = TypeVar('ListenerType')
+
+
+class Address(Protocol[
+    NamespaceType,
+    AddressType,
+    StreamType,
+    ListenerType
+]):
+
+    name_key: ClassVar[str]
+    address_type: ClassVar[Type[AddressType]]
+
+    @property
+    def is_valid(self) -> bool:
+        ...
+
+    @property
+    def namespace(self) -> NamespaceType|None:
+        ...
+
+    @classmethod
+    def from_addr(cls, addr: AddressType) -> Address:
+        ...
+
+    def unwrap(self) -> AddressType:
+        ...
+
+    @classmethod
+    def get_random(cls, namespace: NamespaceType | None = None) -> Address:
+        ...
+
+    @classmethod
+    def get_root(cls) -> Address:
+        ...
+
+    def __repr__(self) -> str:
+        ...
+
+    def __eq__(self, other) -> bool:
+        ...
+
+    async def open_stream(self, **kwargs) -> StreamType:
+        ...
+
+    async def open_listener(self, **kwargs) -> ListenerType:
+        ...
+
+    async def close_listener(self):
+        ...
+
+
+class TCPAddress(Address[
+    str,
+    tuple[str, int],
+    trio.SocketStream,
+    trio.SocketListener
+]):
+
+    name_key: str = 'tcp'
+    address_type: type = tuple[str, int]
+
+    def __init__(
+        self,
+        host: str,
+        port: int
+    ):
+        if (
+            not isinstance(host, str)
+            or
+            not isinstance(port, int)
+        ):
+            raise TypeError(f'Expected host {host} to be str and port {port} to be int')
+        self._host = host
+        self._port = port
+
+    @property
+    def is_valid(self) -> bool:
+        return self._port != 0
+
+    @property
+    def namespace(self) -> str:
+        return self._host
+
+    @classmethod
+    def from_addr(cls, addr: tuple[str, int]) -> TCPAddress:
+        return TCPAddress(addr[0], addr[1])
+
+    def unwrap(self) -> tuple[str, int]:
+        return self._host, self._port
+
+    @classmethod
+    def get_random(cls, namespace: str = '127.0.0.1') -> TCPAddress:
+        return TCPAddress(namespace, 0)
+
+    @classmethod
+    def get_root(cls) -> Address:
+        return TCPAddress('127.0.0.1', 1616)
+
+    def __repr__(self) -> str:
+        return f'{type(self)} @ {self.unwrap()}'
+
+    def __eq__(self, other) -> bool:
+        if not isinstance(other, TCPAddress):
+            raise TypeError(
+                f'Can not compare {type(other)} with {type(self)}'
+            )
+
+        return (
+            self._host == other._host
+            and
+            self._port == other._port
+        )
+
+    async def open_stream(self, **kwargs) -> trio.SocketStream:
+        stream = await trio.open_tcp_stream(
+            self._host,
+            self._port,
+            **kwargs
+        )
+        self._host, self._port = stream.socket.getsockname()[:2]
+        return stream
+
+    async def open_listener(self, **kwargs) -> trio.SocketListener:
+        listeners = await trio.open_tcp_listeners(
+            host=self._host,
+            port=self._port,
+            **kwargs
+        )
+        assert len(listeners) == 1
+        listener = listeners[0]
+        self._host, self._port = listener.socket.getsockname()[:2]
+        return listener
+
+    async def close_listener(self):
+        ...
+
+
+class UDSAddress(Address[
+    None,
+    str,
+    trio.SocketStream,
+    trio.SocketListener
+]):
+
+    name_key: str = 'uds'
+    address_type: type = str
+
+    def __init__(
+        self,
+        filepath: str
+    ):
+        self._filepath = filepath
+
+    @property
+    def is_valid(self) -> bool:
+        return True
+
+    @property
+    def namespace(self) -> None:
+        return
+
+    @classmethod
+    def from_addr(cls, filepath: str) -> UDSAddress:
+        return UDSAddress(filepath)
+
+    def unwrap(self) -> str:
+        return self._filepath
+
+    @classmethod
+    def get_random(cls, namespace: None = None) -> UDSAddress:
+        return UDSAddress(f'{tempfile.gettempdir()}/{uuid4()}.sock')
+
+    @classmethod
+    def get_root(cls) -> Address:
+        return UDSAddress('tractor.sock')
+
+    def __repr__(self) -> str:
+        return f'{type(self)} @ {self._filepath}'
+
+    def __eq__(self, other) -> bool:
+        if not isinstance(other, UDSAddress):
+            raise TypeError(
+                f'Can not compare {type(other)} with {type(self)}'
+            )
+
+        return self._filepath == other._filepath
+
+    async def open_stream(self, **kwargs) -> trio.SocketStream:
+        stream = await trio.open_unix_socket(
+            self._filepath,
+            **kwargs
+        )
+        return stream
+
+    async def open_listener(self, **kwargs) -> trio.SocketListener:
+        self._sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+        await self._sock.bind(self._filepath)
+        self._sock.listen(1)
+        return trio.SocketListener(self._sock)
+
+    async def close_listener(self):
+        self._sock.close()
+        os.unlink(self._filepath)
+
+
+preferred_transport = 'uds'
+
+
+_address_types = (
+    TCPAddress,
+    UDSAddress
+)
+
+
+_default_addrs: dict[str, Type[Address]] = {
+    cls.name_key: cls
+    for cls in _address_types
+}
+
+
+AddressTypes = Union[
+    tuple([
+        cls.address_type
+        for cls in _address_types
+    ])
+]
+
+
+_default_lo_addrs: dict[
+    str,
+    AddressTypes
+] = {
+    cls.name_key: cls.get_root().unwrap()
+    for cls in _address_types
+}
+
+
+def get_address_cls(name: str) -> Type[Address]:
+    return _default_addrs[name]
+
+
+def is_wrapped_addr(addr: any) -> bool:
+    return type(addr) in _address_types
+
+
+def wrap_address(addr: AddressTypes) -> Address:
+
+    if is_wrapped_addr(addr):
+        return addr
+
+    cls = None
+    match addr:
+        case str():
+            cls = UDSAddress
+
+        case tuple() | list():
+            cls = TCPAddress
+
+        case None:
+            cls = get_address_cls(preferred_transport)
+            addr = cls.get_root().unwrap()
+
+        case _:
+            raise TypeError(
+                f'Can not wrap addr {addr} of type {type(addr)}'
+            )
+
+    return cls.from_addr(addr)
+
+
+def default_lo_addrs(transports: list[str]) -> list[AddressTypes]:
+    return [
+        _default_lo_addrs[transport]
+        for transport in transports
+    ]

tractor/_child.py

@@ -31,8 +31,12 @@ def parse_uid(arg):
     return str(name), str(uuid)  # ensures str encoding
 
 def parse_ipaddr(arg):
-    host, port = literal_eval(arg)
+    try:
-    return (str(host), int(port))
+        return literal_eval(arg)
+
+    except (ValueError, SyntaxError):
+        # UDS: try to interpret as a straight up str
+        return arg
 
 
 if __name__ == "__main__":

tractor/_context.py

@@ -859,19 +859,10 @@ class Context:
     @property
     def dst_maddr(self) -> str:
         chan: Channel = self.chan
-        dst_addr, dst_port = chan.raddr
         trans: MsgTransport = chan.transport
         # cid: str = self.cid
         # cid_head, cid_tail = cid[:6], cid[-6:]
-        return (
+        return trans.maddr
-            f'/ipv4/{dst_addr}'
-            f'/{trans.name_key}/{dst_port}'
-            # f'/{self.chan.uid[0]}'
-            # f'/{self.cid}'
-
-            # f'/cid={cid_head}..{cid_tail}'
-            # TODO: ? not use this ^ right ?
-        )
 
     dmaddr = dst_maddr
 

tractor/_discovery.py

@@ -30,6 +30,12 @@ from contextlib import asynccontextmanager as acm
 from tractor.log import get_logger
 from .trionics import gather_contexts
 from .ipc import _connect_chan, Channel
+from ._addr import (
+    AddressTypes,
+    Address,
+    preferred_transport,
+    wrap_address
+)
 from ._portal import (
     Portal,
     open_portal,
@@ -48,11 +54,7 @@ log = get_logger(__name__)
 
 
 @acm
-async def get_registry(
+async def get_registry(addr: AddressTypes | None = None) -> AsyncGenerator[
-    host: str,
-    port: int,
-
-) -> AsyncGenerator[
     Portal | LocalPortal | None,
     None,
 ]:
@@ -69,13 +71,13 @@ async def get_registry(
         # (likely a re-entrant call from the arbiter actor)
         yield LocalPortal(
             actor,
-            Channel((host, port))
+            await Channel.from_addr(addr)
         )
     else:
         # TODO: try to look pre-existing connection from
         # `Actor._peers` and use it instead?
         async with (
-            _connect_chan(host, port) as chan,
+            _connect_chan(addr) as chan,
             open_portal(chan) as regstr_ptl,
         ):
             yield regstr_ptl
@@ -89,11 +91,10 @@ async def get_root(
 
     # TODO: rename mailbox to `_root_maddr` when we finally
     # add and impl libp2p multi-addrs?
-    host, port = _runtime_vars['_root_mailbox']
+    addr = _runtime_vars['_root_mailbox']
-    assert host is not None
 
     async with (
-        _connect_chan(host, port) as chan,
+        _connect_chan(addr) as chan,
         open_portal(chan, **kwargs) as portal,
     ):
         yield portal
@@ -134,10 +135,10 @@ def get_peer_by_name(
 @acm
 async def query_actor(
     name: str,
-    regaddr: tuple[str, int]|None = None,
+    regaddr: AddressTypes|None = None,
 
 ) -> AsyncGenerator[
-    tuple[str, int]|None,
+    AddressTypes|None,
     None,
 ]:
     '''
@@ -163,31 +164,31 @@ async def query_actor(
         return
 
     reg_portal: Portal
-    regaddr: tuple[str, int] = regaddr or actor.reg_addrs[0]
+    regaddr: Address = wrap_address(regaddr) or actor.reg_addrs[0]
-    async with get_registry(*regaddr) as reg_portal:
+    async with get_registry(regaddr) as reg_portal:
         # TODO: return portals to all available actors - for now
         # just the last one that registered
-        sockaddr: tuple[str, int] = await reg_portal.run_from_ns(
+        addr: AddressTypes = await reg_portal.run_from_ns(
             'self',
             'find_actor',
             name=name,
         )
-        yield sockaddr
+        yield addr
 
 
 @acm
 async def maybe_open_portal(
-    addr: tuple[str, int],
+    addr: AddressTypes,
     name: str,
 ):
     async with query_actor(
         name=name,
         regaddr=addr,
-    ) as sockaddr:
+    ) as addr:
         pass
 
-    if sockaddr:
+    if addr:
-        async with _connect_chan(*sockaddr) as chan:
+        async with _connect_chan(addr) as chan:
             async with open_portal(chan) as portal:
                 yield portal
     else:
@@ -197,7 +198,8 @@ async def maybe_open_portal(
 @acm
 async def find_actor(
     name: str,
-    registry_addrs: list[tuple[str, int]]|None = None,
+    registry_addrs: list[AddressTypes]|None = None,
+    enable_transports: list[str] = [preferred_transport],
 
     only_first: bool = True,
     raise_on_none: bool = False,
@@ -224,15 +226,15 @@ async def find_actor(
         # XXX NOTE: make sure to dynamically read the value on
         # every call since something may change it globally (eg.
         # like in our discovery test suite)!
-        from . import _root
+        from ._addr import default_lo_addrs
         registry_addrs = (
             _runtime_vars['_registry_addrs']
             or
-            _root._default_lo_addrs
+            default_lo_addrs(enable_transports)
         )
 
     maybe_portals: list[
-        AsyncContextManager[tuple[str, int]]
+        AsyncContextManager[AddressTypes]
     ] = list(
         maybe_open_portal(
             addr=addr,
@@ -274,7 +276,7 @@ async def find_actor(
 @acm
 async def wait_for_actor(
     name: str,
-    registry_addr: tuple[str, int] | None = None,
+    registry_addr: AddressTypes | None = None,
 
 ) -> AsyncGenerator[Portal, None]:
     '''
@@ -291,7 +293,7 @@ async def wait_for_actor(
             yield peer_portal
             return
 
-    regaddr: tuple[str, int] = (
+    regaddr: AddressTypes = (
         registry_addr
         or
         actor.reg_addrs[0]
@@ -299,8 +301,8 @@ async def wait_for_actor(
     # TODO: use `.trionics.gather_contexts()` like
     # above in `find_actor()` as well?
     reg_portal: Portal
-    async with get_registry(*regaddr) as reg_portal:
+    async with get_registry(regaddr) as reg_portal:
-        sockaddrs = await reg_portal.run_from_ns(
+        addrs = await reg_portal.run_from_ns(
             'self',
             'wait_for_actor',
             name=name,
@@ -308,8 +310,8 @@ async def wait_for_actor(
 
         # get latest registered addr by default?
         # TODO: offer multi-portal yields in multi-homed case?
-        sockaddr: tuple[str, int] = sockaddrs[-1]
+        addr: AddressTypes = addrs[-1]
 
-        async with _connect_chan(*sockaddr) as chan:
+        async with _connect_chan(addr) as chan:
             async with open_portal(chan) as portal:
                 yield portal

tractor/_entry.py

@@ -37,6 +37,7 @@ from .log import (
 from . import _state
 from .devx import _debug
 from .to_asyncio import run_as_asyncio_guest
+from ._addr import AddressTypes
 from ._runtime import (
     async_main,
     Actor,
@@ -52,10 +53,10 @@ log = get_logger(__name__)
 def _mp_main(
 
     actor: Actor,
-    accept_addrs: list[tuple[str, int]],
+    accept_addrs: list[AddressTypes],
     forkserver_info: tuple[Any, Any, Any, Any, Any],
     start_method: SpawnMethodKey,
-    parent_addr: tuple[str, int] | None = None,
+    parent_addr: AddressTypes | None = None,
     infect_asyncio: bool = False,
 
 ) -> None:
@@ -206,7 +207,7 @@ def nest_from_op(
 def _trio_main(
     actor: Actor,
     *,
-    parent_addr: tuple[str, int] | None = None,
+    parent_addr: AddressTypes | None = None,
     infect_asyncio: bool = False,
 
 ) -> None:

tractor/_root.py

@@ -43,21 +43,18 @@ from .devx import _debug
 from . import _spawn
 from . import _state
 from . import log
-from .ipc import _connect_chan
+from .ipc import (
+    _connect_chan,
+)
+from ._addr import (
+    AddressTypes,
+    wrap_address,
+    preferred_transport,
+    default_lo_addrs
+)
 from ._exceptions import is_multi_cancelled
 
 
-# set at startup and after forks
-_default_host: str = '127.0.0.1'
-_default_port: int = 1616
-
-# default registry always on localhost
-_default_lo_addrs: list[tuple[str, int]] = [(
-    _default_host,
-    _default_port,
-)]
-
-
 logger = log.get_logger('tractor')
 
 
@@ -66,10 +63,12 @@ async def open_root_actor(
 
     *,
     # defaults are above
-    registry_addrs: list[tuple[str, int]]|None = None,
+    registry_addrs: list[AddressTypes]|None = None,
 
     # defaults are above
-    arbiter_addr: tuple[str, int]|None = None,
+    arbiter_addr: tuple[AddressTypes]|None = None,
+
+    enable_transports: list[str] = [preferred_transport],
 
     name: str|None = 'root',
 
@@ -195,11 +194,9 @@ async def open_root_actor(
         )
         registry_addrs = [arbiter_addr]
 
-    registry_addrs: list[tuple[str, int]] = (
+    if not registry_addrs:
-        registry_addrs
+        registry_addrs: list[AddressTypes] = default_lo_addrs(enable_transports)
-        or
+
-        _default_lo_addrs
-    )
     assert registry_addrs
 
     loglevel = (
@@ -248,10 +245,10 @@ async def open_root_actor(
         enable_stack_on_sig()
 
     # closed into below ping task-func
-    ponged_addrs: list[tuple[str, int]] = []
+    ponged_addrs: list[AddressTypes] = []
 
     async def ping_tpt_socket(
-        addr: tuple[str, int],
+        addr: AddressTypes,
         timeout: float = 1,
     ) -> None:
         '''
@@ -271,7 +268,7 @@ async def open_root_actor(
             # be better to eventually have a "discovery" protocol
             # with basic handshake instead?
             with trio.move_on_after(timeout):
-                async with _connect_chan(*addr):
+                async with _connect_chan(addr):
                     ponged_addrs.append(addr)
 
         except OSError:
@@ -284,10 +281,10 @@ async def open_root_actor(
         for addr in registry_addrs:
             tn.start_soon(
                 ping_tpt_socket,
-                tuple(addr),  # TODO: just drop this requirement?
+                addr,
             )
 
-    trans_bind_addrs: list[tuple[str, int]] = []
+    trans_bind_addrs: list[AddressTypes] = []
 
     # Create a new local root-actor instance which IS NOT THE
     # REGISTRAR
@@ -311,9 +308,12 @@ async def open_root_actor(
         )
         # DO NOT use the registry_addrs as the transport server
         # addrs for this new non-registar, root-actor.
-        for host, port in ponged_addrs:
+        for addr in ponged_addrs:
-            # NOTE: zero triggers dynamic OS port allocation
+            waddr = wrap_address(addr)
-            trans_bind_addrs.append((host, 0))
+            print(waddr)
+            trans_bind_addrs.append(
+                waddr.get_random(namespace=waddr.namespace)
+            )
 
     # Start this local actor as the "registrar", aka a regular
     # actor who manages the local registry of "mailboxes" of
@@ -322,7 +322,7 @@ async def open_root_actor(
 
         # NOTE that if the current actor IS THE REGISTAR, the
         # following init steps are taken:
-        # - the tranport layer server is bound to each (host, port)
+        # - the tranport layer server is bound to each addr
         #   pair defined in provided registry_addrs, or the default.
         trans_bind_addrs = registry_addrs
 
@@ -462,7 +462,7 @@ def run_daemon(
 
     # runtime kwargs
     name: str | None = 'root',
-    registry_addrs: list[tuple[str, int]] = _default_lo_addrs,
+    registry_addrs: list[AddressTypes]|None = None,
 
     start_method: str | None = None,
     debug_mode: bool = False,

tractor/_runtime.py

@@ -74,6 +74,13 @@ from tractor.msg import (
     types as msgtypes,
 )
 from .ipc import Channel
+from ._addr import (
+    AddressTypes,
+    Address,
+    wrap_address,
+    preferred_transport,
+    default_lo_addrs
+)
 from ._context import (
     mk_context,
     Context,
@@ -179,11 +186,11 @@ class Actor:
         enable_modules: list[str] = [],
         uid: str|None = None,
         loglevel: str|None = None,
-        registry_addrs: list[tuple[str, int]]|None = None,
+        registry_addrs: list[AddressTypes]|None = None,
         spawn_method: str|None = None,
 
         # TODO: remove!
-        arbiter_addr: tuple[str, int]|None = None,
+        arbiter_addr: AddressTypes|None = None,
 
     ) -> None:
         '''
@@ -223,7 +230,7 @@ class Actor:
                 DeprecationWarning,
                 stacklevel=2,
             )
-            registry_addrs: list[tuple[str, int]] = [arbiter_addr]
+            registry_addrs: list[AddressTypes] = [arbiter_addr]
 
         # marked by the process spawning backend at startup
         # will be None for the parent most process started manually
@@ -257,6 +264,7 @@ class Actor:
         ] = {}
 
         self._listeners: list[trio.abc.Listener] = []
+        self._listen_addrs: list[Address] = []
         self._parent_chan: Channel|None = None
         self._forkserver_info: tuple|None = None
 
@@ -269,13 +277,13 @@ class Actor:
 
         # when provided, init the registry addresses property from
         # input via the validator.
-        self._reg_addrs: list[tuple[str, int]] = []
+        self._reg_addrs: list[AddressTypes] = []
         if registry_addrs:
-            self.reg_addrs: list[tuple[str, int]] = registry_addrs
+            self.reg_addrs: list[AddressTypes] = registry_addrs
             _state._runtime_vars['_registry_addrs'] = registry_addrs
 
     @property
-    def reg_addrs(self) -> list[tuple[str, int]]:
+    def reg_addrs(self) -> list[AddressTypes]:
         '''
         List of (socket) addresses for all known (and contactable)
         registry actors.
@@ -286,7 +294,7 @@ class Actor:
     @reg_addrs.setter
     def reg_addrs(
         self,
-        addrs: list[tuple[str, int]],
+        addrs: list[AddressTypes],
     ) -> None:
         if not addrs:
             log.warning(
@@ -295,15 +303,6 @@ class Actor:
             )
             return
 
-        # always sanity check the input list since it's critical
-        # that addrs are correct for discovery sys operation.
-        for addr in addrs:
-            if not isinstance(addr, tuple):
-                raise ValueError(
-                    'Expected `Actor.reg_addrs: list[tuple[str, int]]`\n'
-                    f'Got {addrs}'
-                )
-
         self._reg_addrs = addrs
 
     async def wait_for_peer(
@@ -1024,11 +1023,11 @@ class Actor:
 
     async def _from_parent(
         self,
-        parent_addr: tuple[str, int]|None,
+        parent_addr: AddressTypes|None,
 
     ) -> tuple[
         Channel,
-        list[tuple[str, int]]|None,
+        list[AddressTypes]|None,
     ]:
         '''
         Bootstrap this local actor's runtime config from its parent by
@@ -1040,16 +1039,13 @@ class Actor:
             # Connect back to the parent actor and conduct initial
             # handshake. From this point on if we error, we
             # attempt to ship the exception back to the parent.
-            chan = Channel(
+            chan = await Channel.from_addr(wrap_address(parent_addr))
-                destaddr=parent_addr,
-            )
-            await chan.connect()
 
             # TODO: move this into a `Channel.handshake()`?
             # Initial handshake: swap names.
             await self._do_handshake(chan)
 
-            accept_addrs: list[tuple[str, int]]|None = None
+            accept_addrs: list[AddressTypes]|None = None
 
             if self._spawn_method == "trio":
 
@@ -1066,7 +1062,7 @@ class Actor:
                     # if "trace"/"util" mode is enabled?
                     f'{pretty_struct.pformat(spawnspec)}\n'
                 )
-                accept_addrs: list[tuple[str, int]] = spawnspec.bind_addrs
+                accept_addrs: list[AddressTypes] = spawnspec.bind_addrs
 
                 # TODO: another `Struct` for rtvs..
                 rvs: dict[str, Any] = spawnspec._runtime_vars
@@ -1173,8 +1169,7 @@ class Actor:
         self,
         handler_nursery: Nursery,
         *,
-        # (host, port) to bind for channel server
+        listen_addrs: list[AddressTypes]|None = None,
-        listen_sockaddrs: list[tuple[str, int]]|None = None,
 
         task_status: TaskStatus[Nursery] = trio.TASK_STATUS_IGNORED,
     ) -> None:
@@ -1186,41 +1181,45 @@ class Actor:
         `.cancel_server()` is called.
 
         '''
-        if listen_sockaddrs is None:
+        if listen_addrs is None:
-            listen_sockaddrs = [(None, 0)]
+            listen_addrs = default_lo_addrs([preferred_transport])
+
+        else:
+            listen_addrs: list[Address] = [
+                wrap_address(a) for a in listen_addrs
+            ]
 
         self._server_down = trio.Event()
         try:
             async with trio.open_nursery() as server_n:
-
+                listeners: list[trio.abc.Listener] = [
-                for host, port in listen_sockaddrs:
+                    await addr.open_listener()
-                    listeners: list[trio.abc.Listener] = await server_n.start(
+                    for addr in listen_addrs
+                ]
+                await server_n.start(
                     partial(
-                            trio.serve_tcp,
+                        trio.serve_listeners,
-
                         handler=self._stream_handler,
-                            port=port,
+                        listeners=listeners,
-                            host=host,
 
                         # NOTE: configured such that new
                         # connections will stay alive even if
                         # this server is cancelled!
-                            handler_nursery=handler_nursery,
+                        handler_nursery=handler_nursery
                     )
                 )
-                    sockets: list[trio.socket] = [
-                        getattr(listener, 'socket', 'unknown socket')
-                        for listener in listeners
-                    ]
                 log.runtime(
-                        'Started TCP server(s)\n'
+                    'Started server(s)\n'
-                        f'|_{sockets}\n'
+                    '\n'.join([f'|_{addr}' for addr in listen_addrs])
                 )
+                self._listen_addrs.extend(listen_addrs)
                 self._listeners.extend(listeners)
 
                 task_status.started(server_n)
 
         finally:
+            for addr in listen_addrs:
+                await addr.close_listener()
             # signal the server is down since nursery above terminated
             self._server_down.set()
 
@@ -1579,26 +1578,21 @@ class Actor:
         return False
 
     @property
-    def accept_addrs(self) -> list[tuple[str, int]]:
+    def accept_addrs(self) -> list[AddressTypes]:
         '''
         All addresses to which the transport-channel server binds
         and listens for new connections.
 
         '''
-        # throws OSError on failure
+        return [a.unwrap() for a in self._listen_addrs]
-        return [
-            listener.socket.getsockname() 
-            for listener in self._listeners
-        ]  # type: ignore
 
     @property
-    def accept_addr(self) -> tuple[str, int]:
+    def accept_addr(self) -> AddressTypes:
         '''
         Primary address to which the IPC transport server is
         bound and listening for new connections.
 
         '''
-        # throws OSError on failure
         return self.accept_addrs[0]
 
     def get_parent(self) -> Portal:
@@ -1670,7 +1664,7 @@ class Actor:
 
 async def async_main(
     actor: Actor,
-    accept_addrs: tuple[str, int]|None = None,
+    accept_addrs: AddressTypes|None = None,
 
     # XXX: currently ``parent_addr`` is only needed for the
     # ``multiprocessing`` backend (which pickles state sent to
@@ -1679,7 +1673,7 @@ async def async_main(
     # change this to a simple ``is_subactor: bool`` which will
     # be False when running as root actor and True when as
     # a subactor.
-    parent_addr: tuple[str, int]|None = None,
+    parent_addr: AddressTypes|None = None,
     task_status: TaskStatus[None] = trio.TASK_STATUS_IGNORED,
 
 ) -> None:
@@ -1769,7 +1763,7 @@ async def async_main(
                         partial(
                             actor._serve_forever,
                             service_nursery,
-                            listen_sockaddrs=accept_addrs,
+                            listen_addrs=accept_addrs,
                         )
                     )
                 except OSError as oserr:
@@ -1785,7 +1779,7 @@ async def async_main(
 
                     raise
 
-                accept_addrs: list[tuple[str, int]] = actor.accept_addrs
+                accept_addrs: list[AddressTypes] = actor.accept_addrs
 
                 # NOTE: only set the loopback addr for the 
                 # process-tree-global "root" mailbox since
@@ -1793,9 +1787,8 @@ async def async_main(
                 # their root actor over that channel.
                 if _state._runtime_vars['_is_root']:
                     for addr in accept_addrs:
-                        host, _ = addr
+                        waddr = wrap_address(addr)
-                        # TODO: generic 'lo' detector predicate
+                        if waddr == waddr.get_root():
-                        if '127.0.0.1' in host:
                             _state._runtime_vars['_root_mailbox'] = addr
 
                 # Register with the arbiter if we're told its addr
@@ -1810,24 +1803,21 @@ async def async_main(
                 # only on unique actor uids?
                 for addr in actor.reg_addrs:
                     try:
-                        assert isinstance(addr, tuple)
+                        waddr = wrap_address(addr)
-                        assert addr[1]  # non-zero after bind
+                        assert waddr.is_valid
                     except AssertionError:
                         await _debug.pause()
 
-                    async with get_registry(*addr) as reg_portal:
+                    async with get_registry(addr) as reg_portal:
                         for accept_addr in accept_addrs:
-
+                            accept_addr = wrap_address(accept_addr)
-                            if not accept_addr[1]:
+                            assert accept_addr.is_valid
-                                await _debug.pause()
-
-                            assert accept_addr[1]
 
                             await reg_portal.run_from_ns(
                                 'self',
                                 'register_actor',
                                 uid=actor.uid,
-                                sockaddr=accept_addr,
+                                addr=accept_addr.unwrap(),
                             )
 
                     is_registered: bool = True
@@ -1954,12 +1944,13 @@ async def async_main(
         ):
             failed: bool = False
             for addr in actor.reg_addrs:
-                assert isinstance(addr, tuple)
+                waddr = wrap_address(addr)
+                assert waddr.is_valid
                 with trio.move_on_after(0.5) as cs:
                     cs.shield = True
                     try:
                         async with get_registry(
-                            *addr,
+                            addr,
                         ) as reg_portal:
                             await reg_portal.run_from_ns(
                                 'self',
@@ -2037,7 +2028,7 @@ class Arbiter(Actor):
 
         self._registry: dict[
             tuple[str, str],
-            tuple[str, int],
+            AddressTypes,
         ] = {}
         self._waiters: dict[
             str,
@@ -2053,18 +2044,18 @@ class Arbiter(Actor):
         self,
         name: str,
 
-    ) -> tuple[str, int]|None:
+    ) -> AddressTypes|None:
 
-        for uid, sockaddr in self._registry.items():
+        for uid, addr in self._registry.items():
             if name in uid:
-                return sockaddr
+                return addr
 
         return None
 
     async def get_registry(
         self
 
-    ) -> dict[str, tuple[str, int]]:
+    ) -> dict[str, AddressTypes]:
         '''
         Return current name registry.
 
@@ -2084,7 +2075,7 @@ class Arbiter(Actor):
         self,
         name: str,
 
-    ) -> list[tuple[str, int]]:
+    ) -> list[AddressTypes]:
         '''
         Wait for a particular actor to register.
 
@@ -2092,44 +2083,41 @@ class Arbiter(Actor):
         registered.
 
         '''
-        sockaddrs: list[tuple[str, int]] = []
+        addrs: list[AddressTypes] = []
-        sockaddr: tuple[str, int]
+        addr: AddressTypes
 
         mailbox_info: str = 'Actor registry contact infos:\n'
-        for uid, sockaddr in self._registry.items():
+        for uid, addr in self._registry.items():
             mailbox_info += (
                 f'|_uid: {uid}\n'
-                f'|_sockaddr: {sockaddr}\n\n'
+                f'|_addr: {addr}\n\n'
             )
             if name == uid[0]:
-                sockaddrs.append(sockaddr)
+                addrs.append(addr)
 
-        if not sockaddrs:
+        if not addrs:
             waiter = trio.Event()
             self._waiters.setdefault(name, []).append(waiter)
             await waiter.wait()
 
             for uid in self._waiters[name]:
                 if not isinstance(uid, trio.Event):
-                    sockaddrs.append(self._registry[uid])
+                    addrs.append(self._registry[uid])
 
         log.runtime(mailbox_info)
-        return sockaddrs
+        return addrs
 
     async def register_actor(
         self,
         uid: tuple[str, str],
-        sockaddr: tuple[str, int]
+        addr: AddressTypes
-
     ) -> None:
         uid = name, hash = (str(uid[0]), str(uid[1]))
-        addr = (host, port) = (
+        waddr: Address = wrap_address(addr)
-            str(sockaddr[0]),
+        if not waddr.is_valid:
-            int(sockaddr[1]),
+            # should never be 0-dynamic-os-alloc
-        )
-        if port == 0:
             await _debug.pause()
-        assert port  # should never be 0-dynamic-os-alloc
+
         self._registry[uid] = addr
 
         # pop and signal all waiter events

tractor/_spawn.py

@@ -46,6 +46,7 @@ from tractor._state import (
     _runtime_vars,
 )
 from tractor.log import get_logger
+from tractor._addr import AddressTypes
 from tractor._portal import Portal
 from tractor._runtime import Actor
 from tractor._entry import _mp_main
@@ -392,8 +393,8 @@ async def new_proc(
     errors: dict[tuple[str, str], Exception],
 
     # passed through to actor main
-    bind_addrs: list[tuple[str, int]],
+    bind_addrs: list[AddressTypes],
-    parent_addr: tuple[str, int],
+    parent_addr: AddressTypes,
     _runtime_vars: dict[str, Any],  # serialized and sent to _child
 
     *,
@@ -431,8 +432,8 @@ async def trio_proc(
     errors: dict[tuple[str, str], Exception],
 
     # passed through to actor main
-    bind_addrs: list[tuple[str, int]],
+    bind_addrs: list[AddressTypes],
-    parent_addr: tuple[str, int],
+    parent_addr: AddressTypes,
     _runtime_vars: dict[str, Any],  # serialized and sent to _child
     *,
     infect_asyncio: bool = False,
@@ -520,15 +521,15 @@ async def trio_proc(
 
         # send a "spawning specification" which configures the
         # initial runtime state of the child.
-        await chan.send(
+        sspec = SpawnSpec(
-            SpawnSpec(
             _parent_main_data=subactor._parent_main_data,
             enable_modules=subactor.enable_modules,
             reg_addrs=subactor.reg_addrs,
             bind_addrs=bind_addrs,
             _runtime_vars=_runtime_vars,
         )
-        )
+        log.runtime(f'Sending spawn spec: {str(sspec)}')
+        await chan.send(sspec)
 
         # track subactor in current nursery
         curr_actor: Actor = current_actor()
@@ -638,8 +639,8 @@ async def mp_proc(
     subactor: Actor,
     errors: dict[tuple[str, str], Exception],
     # passed through to actor main
-    bind_addrs: list[tuple[str, int]],
+    bind_addrs: list[AddressTypes],
-    parent_addr: tuple[str, int],
+    parent_addr: AddressTypes,
     _runtime_vars: dict[str, Any],  # serialized and sent to _child
     *,
     infect_asyncio: bool = False,

tractor/_supervise.py

@@ -28,7 +28,13 @@ import warnings
 
 import trio
 
+
 from .devx._debug import maybe_wait_for_debugger
+from ._addr import (
+    AddressTypes,
+    preferred_transport,
+    get_address_cls
+)
 from ._state import current_actor, is_main_process
 from .log import get_logger, get_loglevel
 from ._runtime import Actor
@@ -47,8 +53,6 @@ if TYPE_CHECKING:
 
 log = get_logger(__name__)
 
-_default_bind_addr: tuple[str, int] = ('127.0.0.1', 0)
-
 
 class ActorNursery:
     '''
@@ -130,8 +134,9 @@ class ActorNursery:
 
         *,
 
-        bind_addrs: list[tuple[str, int]] = [_default_bind_addr],
+        bind_addrs: list[AddressTypes]|None = None,
         rpc_module_paths: list[str]|None = None,
+        enable_transports: list[str] = [preferred_transport],
         enable_modules: list[str]|None = None,
         loglevel: str|None = None,  # set log level per subactor
         debug_mode: bool|None = None,
@@ -156,6 +161,12 @@ class ActorNursery:
             or get_loglevel()
         )
 
+        if not bind_addrs:
+            bind_addrs: list[AddressTypes] = [
+                get_address_cls(transport).get_random().unwrap()
+                for transport in enable_transports
+            ]
+
         # configure and pass runtime state
         _rtv = _state._runtime_vars.copy()
         _rtv['_is_root'] = False
@@ -224,7 +235,7 @@ class ActorNursery:
         *,
 
         name: str | None = None,
-        bind_addrs: tuple[str, int] = [_default_bind_addr],
+        bind_addrs: AddressTypes|None = None,
         rpc_module_paths: list[str] | None = None,
         enable_modules: list[str] | None = None,
         loglevel: str | None = None,  # set log level per subactor

tractor/_testing/samples.py

@@ -2,19 +2,59 @@ import os
 import random
 
 
+def generate_single_byte_msgs(amount: int) -> bytes:
+    '''
+    Generate a byte instance of len `amount` with:
+
+    ```
+    byte_at_index(i) = (i % 10).encode()
+    ```
+
+    this results in constantly repeating sequences of:
+
+    b'0123456789'
+
+    '''
+    return b''.join(str(i % 10).encode() for i in range(amount))
+
+
 def generate_sample_messages(
     amount: int,
     rand_min: int = 0,
     rand_max: int = 0,
-    silent: bool = False
+    silent: bool = False,
 ) -> tuple[list[bytes], int]:
+    '''
+    Generate bytes msgs for tests.
 
+    Messages will have the following format:
+
+    ```
+    b'[{i:08}]' + os.urandom(random.randint(rand_min, rand_max))
+    ```
+
+    so for message index 25:
+
+    b'[00000025]' + random_bytes
+
+    '''
     msgs = []
     size = 0
 
+    log_interval = None
     if not silent:
         print(f'\ngenerating {amount} messages...')
 
+        # calculate an apropiate log interval based on
+        # max message size
+        max_msg_size = 10 + rand_max
+
+        if max_msg_size <= 32 * 1024:
+            log_interval = 10_000
+
+        else:
+            log_interval = 1000
+
     for i in range(amount):
         msg = f'[{i:08}]'.encode('utf-8')
 
@@ -26,7 +66,13 @@ def generate_sample_messages(
 
         msgs.append(msg)
 
-        if not silent and i and i % 10_000 == 0:
+        if (
+            not silent
+            and
+            i > 0
+            and
+            i % log_interval == 0
+        ):
             print(f'{i} generated')
 
     if not silent:

tractor/ipc/__init__.py

@@ -13,20 +13,25 @@
 
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
-
-
 import platform
 
-from ._transport import MsgTransport as MsgTransport
+from ._transport import (
+    MsgTransportKey as MsgTransportKey,
+    MsgType as MsgType,
+    MsgTransport as MsgTransport,
+    MsgpackTransport as MsgpackTransport
+)
 
-from ._tcp import (
+from ._tcp import MsgpackTCPStream as MsgpackTCPStream
-    get_stream_addrs as get_stream_addrs,
+from ._uds import MsgpackUDSStream as MsgpackUDSStream
-    MsgpackTCPStream as MsgpackTCPStream
+
+from ._types import (
+    transport_from_addr as transport_from_addr,
+    transport_from_stream as transport_from_stream,
 )
 
 from ._chan import (
     _connect_chan as _connect_chan,
-    get_msg_transport as get_msg_transport,
     Channel as Channel
 )
 
@@ -39,12 +44,23 @@ if platform.system() == 'Linux':
         write_eventfd as write_eventfd,
         read_eventfd as read_eventfd,
         close_eventfd as close_eventfd,
+        EFDReadCancelled as EFDReadCancelled,
         EventFD as EventFD,
     )
 
     from ._ringbuf import (
         RBToken as RBToken,
+        open_ringbuf as open_ringbuf,
         RingBuffSender as RingBuffSender,
         RingBuffReceiver as RingBuffReceiver,
-        open_ringbuf as open_ringbuf
+        open_ringbuf_pair as open_ringbuf_pair,
+        attach_to_ringbuf_receiver as attach_to_ringbuf_receiver,
+        attach_to_ringbuf_sender as attach_to_ringbuf_sender,
+        attach_to_ringbuf_stream as attach_to_ringbuf_stream,
+        RingBuffBytesSender as RingBuffBytesSender,
+        RingBuffBytesReceiver as RingBuffBytesReceiver,
+        RingBuffChannel as RingBuffChannel,
+        attach_to_ringbuf_schannel as attach_to_ringbuf_schannel,
+        attach_to_ringbuf_rchannel as attach_to_ringbuf_rchannel,
+        attach_to_ringbuf_channel as attach_to_ringbuf_channel,
     )

tractor/ipc/_chan.py

@@ -29,15 +29,19 @@ from pprint import pformat
 import typing
 from typing import (
     Any,
-    Type
 )
 
 import trio
 
 from tractor.ipc._transport import MsgTransport
-from tractor.ipc._tcp import (
+from tractor.ipc._types import (
-    MsgpackTCPStream,
+    transport_from_addr,
-    get_stream_addrs
+    transport_from_stream,
+)
+from tractor._addr import (
+    wrap_address,
+    Address,
+    AddressTypes
 )
 from tractor.log import get_logger
 from tractor._exceptions import (
@@ -52,17 +56,6 @@ log = get_logger(__name__)
 _is_windows = platform.system() == 'Windows'
 
 
-def get_msg_transport(
-
-    key: tuple[str, str],
-
-) -> Type[MsgTransport]:
-
-    return {
-        ('msgpack', 'tcp'): MsgpackTCPStream,
-    }[key]
-
-
 class Channel:
     '''
     An inter-process channel for communication between (remote) actors.
@@ -77,10 +70,7 @@ class Channel:
     def __init__(
 
         self,
-        destaddr: tuple[str, int]|None,
+        transport: MsgTransport|None = None,
-
-        msg_transport_type_key: tuple[str, str] = ('msgpack', 'tcp'),
-
         # TODO: optional reconnection support?
         # auto_reconnect: bool = False,
         # on_reconnect: typing.Callable[..., typing.Awaitable] = None,
@@ -90,13 +80,9 @@ class Channel:
         # self._recon_seq = on_reconnect
         # self._autorecon = auto_reconnect
 
-        self._destaddr = destaddr
-        self._transport_key = msg_transport_type_key
-
         # Either created in ``.connect()`` or passed in by
         # user in ``.from_stream()``.
-        self._stream: trio.SocketStream|None = None
+        self._transport: MsgTransport|None = transport
-        self._transport: MsgTransport|None = None
 
         # set after handshake - always uid of far end
         self.uid: tuple[str, str]|None = None
@@ -110,6 +96,10 @@ class Channel:
         # runtime.
         self._cancel_called: bool = False
 
+    @property
+    def stream(self) -> trio.abc.Stream | None:
+        return self._transport.stream if self._transport else None
+
     @property
     def msgstream(self) -> MsgTransport:
         log.info(
@@ -124,52 +114,32 @@ class Channel:
     @classmethod
     def from_stream(
         cls,
-        stream: trio.SocketStream,
+        stream: trio.abc.Stream,
-        **kwargs,
-
     ) -> Channel:
-
+        transport_cls = transport_from_stream(stream)
-        src, dst = get_stream_addrs(stream)
+        return Channel(
-        chan = Channel(
+            transport=transport_cls(stream)
-            destaddr=dst,
-            **kwargs,
         )
 
-        # set immediately here from provided instance
+    @classmethod
-        chan._stream: trio.SocketStream = stream
+    async def from_addr(
-        chan.set_msg_transport(stream)
+        cls,
-        return chan
+        addr: AddressTypes,
+        **kwargs
+    ) -> Channel:
+        addr: Address = wrap_address(addr)
+        transport_cls = transport_from_addr(addr)
+        transport = await transport_cls.connect_to(addr, **kwargs)
 
-    def set_msg_transport(
+        log.transport(
-        self,
+            f'Opened channel[{type(transport)}]: {transport.laddr} -> {transport.raddr}'
-        stream: trio.SocketStream,
-        type_key: tuple[str, str]|None = None,
-
-        # XXX optionally provided codec pair for `msgspec`:
-        # https://jcristharif.com/msgspec/extending.html#mapping-to-from-native-types
-        codec: MsgCodec|None = None,
-
-    ) -> MsgTransport:
-        type_key = (
-            type_key
-            or
-            self._transport_key
         )
-        # get transport type, then
+        return Channel(transport=transport)
-        self._transport = get_msg_transport(
-            type_key
-        # instantiate an instance of the msg-transport
-        )(
-            stream,
-            codec=codec,
-        )
-        return self._transport
 
     @cm
     def apply_codec(
         self,
         codec: MsgCodec,
-
     ) -> None:
         '''
         Temporarily override the underlying IPC msg codec for
@@ -189,44 +159,20 @@ class Channel:
             return '<Channel with inactive transport?>'
 
         return repr(
-            self._transport.stream.socket._sock
+            self._transport
         ).replace(  # type: ignore
             "socket.socket",
             "Channel",
         )
 
     @property
-    def laddr(self) -> tuple[str, int]|None:
+    def laddr(self) -> Address|None:
         return self._transport.laddr if self._transport else None
 
     @property
-    def raddr(self) -> tuple[str, int]|None:
+    def raddr(self) -> Address|None:
         return self._transport.raddr if self._transport else None
 
-    async def connect(
-        self,
-        destaddr: tuple[Any, ...] | None = None,
-        **kwargs
-
-    ) -> MsgTransport:
-
-        if self.connected():
-            raise RuntimeError("channel is already connected?")
-
-        destaddr = destaddr or self._destaddr
-        assert isinstance(destaddr, tuple)
-
-        stream = await trio.open_tcp_stream(
-            *destaddr,
-            **kwargs
-        )
-        transport = self.set_msg_transport(stream)
-
-        log.transport(
-            f'Opened channel[{type(transport)}]: {self.laddr} -> {self.raddr}'
-        )
-        return transport
-
     # TODO: something like,
     # `pdbp.hideframe_on(errors=[MsgTypeError])`
     # instead of the `try/except` hack we have rn..
@@ -261,8 +207,12 @@ class Channel:
                 # assert err
                 __tracebackhide__: bool = False
             else:
+                try:
                     assert err.cid
 
+                except KeyError:
+                    raise err
+
             raise
 
     async def recv(self) -> Any:
@@ -388,17 +338,14 @@ class Channel:
 
 @acm
 async def _connect_chan(
-    host: str,
+    addr: AddressTypes
-    port: int
-
 ) -> typing.AsyncGenerator[Channel, None]:
     '''
     Create and connect a channel with disconnect on context manager
     teardown.
 
     '''
-    chan = Channel((host, port))
+    chan = await Channel.from_addr(addr)
-    await chan.connect()
     yield chan
     with trio.CancelScope(shield=True):
         await chan.aclose()

tractor/ipc/_linux.py

@@ -108,6 +108,10 @@ def close_eventfd(fd: int) -> int:
         raise OSError(errno.errorcode[ffi.errno], 'close failed')
 
 
+class EFDReadCancelled(Exception):
+    ...
+
+
 class EventFD:
     '''
     Use a previously opened eventfd(2), meant to be used in
@@ -124,6 +128,7 @@ class EventFD:
         self._fd: int = fd
         self._omode: str = omode
         self._fobj = None
+        self._cscope: trio.CancelScope | None = None
 
     @property
     def fd(self) -> int | None:
@@ -133,18 +138,47 @@ class EventFD:
         return write_eventfd(self._fd, value)
 
     async def read(self) -> int:
+        '''
+        Async wrapper for `read_eventfd(self.fd)`
+
+        `trio.to_thread.run_sync` is used, need to use a `trio.CancelScope`
+        in order to make it cancellable when `self.close()` is called.
+
+        '''
+        self._cscope = trio.CancelScope()
+        with self._cscope:
             return await trio.to_thread.run_sync(
                 read_eventfd, self._fd,
                 abandon_on_cancel=True
             )
 
+        if self._cscope.cancelled_caught:
+            raise EFDReadCancelled
+
+        self._cscope = None
+
+    def read_direct(self) -> int:
+        '''
+        Direct call to `read_eventfd(self.fd)`, unless `eventfd` was
+        opened with `EFD_NONBLOCK` its gonna block the thread.
+
+        '''
+        return read_eventfd(self._fd)
+
     def open(self):
         self._fobj = os.fdopen(self._fd, self._omode)
 
     def close(self):
         if self._fobj:
+            try:
                 self._fobj.close()
 
+            except OSError:
+                ...
+
+        if self._cscope:
+            self._cscope.cancel()
+
     def __enter__(self):
         self.open()
         return self

tractor/ipc/_ringbuf.py

@@ -18,7 +18,15 @@ IPC Reliable RingBuffer implementation
 
 '''
 from __future__ import annotations
-from contextlib import contextmanager as cm
+import struct
+from typing import (
+    ContextManager,
+    AsyncContextManager
+)
+from contextlib import (
+    contextmanager as cm,
+    asynccontextmanager as acm
+)
 from multiprocessing.shared_memory import SharedMemory
 
 import trio
@@ -28,25 +36,37 @@ from msgspec import (
 )
 
 from ._linux import (
-    EFD_NONBLOCK,
     open_eventfd,
+    EFDReadCancelled,
     EventFD
 )
 from ._mp_bs import disable_mantracker
+from tractor.log import get_logger
+from tractor._exceptions import (
+    InternalError
+)
+
+
+log = get_logger(__name__)
 
 
 disable_mantracker()
 
+_DEFAULT_RB_SIZE = 10 * 1024
+
 
 class RBToken(Struct, frozen=True):
     '''
-    RingBuffer token contains necesary info to open the two
+    RingBuffer token contains necesary info to open the three
     eventfds and the shared memory
 
     '''
     shm_name: str
-    write_eventfd: int
+
-    wrap_eventfd: int
+    write_eventfd: int  # used to signal writer ptr advance
+    wrap_eventfd: int  # used to signal reader ready after wrap around
+    eof_eventfd: int  # used to signal writer closed
+
     buf_size: int
 
     def as_msg(self):
@@ -59,24 +79,45 @@ class RBToken(Struct, frozen=True):
 
         return RBToken(**msg)
 
+    @property
+    def fds(self) -> tuple[int, int, int]:
+        '''
+        Useful for `pass_fds` params
+
+        '''
+        return (
+            self.write_eventfd,
+            self.wrap_eventfd,
+            self.eof_eventfd
+        )
+
 
 @cm
 def open_ringbuf(
     shm_name: str,
-    buf_size: int = 10 * 1024,
+    buf_size: int = _DEFAULT_RB_SIZE,
-    write_efd_flags: int = 0,
+) -> ContextManager[RBToken]:
-    wrap_efd_flags: int = 0
+    '''
-) -> RBToken:
+    Handle resources for a ringbuf (shm, eventfd), yield `RBToken` to
+    be used with `attach_to_ringbuf_sender` and `attach_to_ringbuf_receiver`
+
+    '''
     shm = SharedMemory(
         name=shm_name,
         size=buf_size,
         create=True
     )
     try:
+        with (
+            EventFD(open_eventfd(), 'r') as write_event,
+            EventFD(open_eventfd(), 'r') as wrap_event,
+            EventFD(open_eventfd(), 'r') as eof_event,
+        ):
             token = RBToken(
                 shm_name=shm_name,
-            write_eventfd=open_eventfd(flags=write_efd_flags),
+                write_eventfd=write_event.fd,
-            wrap_eventfd=open_eventfd(flags=wrap_efd_flags),
+                wrap_eventfd=wrap_event.fd,
+                eof_eventfd=eof_event.fd,
                 buf_size=buf_size
             )
             yield token
@@ -85,36 +126,50 @@ def open_ringbuf(
         shm.unlink()
 
 
+Buffer = bytes | bytearray | memoryview
+
+
+'''
+IPC Reliable Ring Buffer
+
+`eventfd(2)` is used for wrap around sync, to signal writes to
+the reader and end of stream.
+
+'''
+
+
 class RingBuffSender(trio.abc.SendStream):
     '''
-    IPC Reliable Ring Buffer sender side implementation
+    Ring Buffer sender side implementation
 
-    `eventfd(2)` is used for wrap around sync, and also to signal
+    Do not use directly! manage with `attach_to_ringbuf_sender`
-    writes to the reader.
+    after having opened a ringbuf context with `open_ringbuf`.
 
     '''
     def __init__(
         self,
         token: RBToken,
-        start_ptr: int = 0,
+        cleanup: bool = False
     ):
-        token = RBToken.from_msg(token)
+        self._token = RBToken.from_msg(token)
-        self._shm = SharedMemory(
+        self._shm: SharedMemory | None = None
-            name=token.shm_name,
+        self._write_event = EventFD(self._token.write_eventfd, 'w')
-            size=token.buf_size,
+        self._wrap_event = EventFD(self._token.wrap_eventfd, 'r')
-            create=False
+        self._eof_event = EventFD(self._token.eof_eventfd, 'w')
-        )
+        self._ptr = 0
-        self._write_event = EventFD(token.write_eventfd, 'w')
+
-        self._wrap_event = EventFD(token.wrap_eventfd, 'r')
+        self._cleanup = cleanup
-        self._ptr = start_ptr
+        self._send_lock = trio.StrictFIFOLock()
 
     @property
-    def key(self) -> str:
+    def name(self) -> str:
+        if not self._shm:
+            raise ValueError('shared memory not initialized yet!')
         return self._shm.name
 
     @property
     def size(self) -> int:
-        return self._shm.size
+        return self._token.buf_size
 
     @property
     def ptr(self) -> int:
@@ -128,7 +183,11 @@ class RingBuffSender(trio.abc.SendStream):
     def wrap_fd(self) -> int:
         return self._wrap_event.fd
 
-    async def send_all(self, data: bytes | bytearray | memoryview):
+    async def _wait_wrap(self):
+        await self._wrap_event.read()
+
+    async def send_all(self, data: Buffer):
+        async with self._send_lock:
             # while data is larger than the remaining buf
             target_ptr = self.ptr + len(data)
             while target_ptr > self.size:
@@ -137,7 +196,7 @@ class RingBuffSender(trio.abc.SendStream):
                 self._shm.buf[self.ptr:] = data[:remaining]
                 # signal write and wait for reader wrap around
                 self._write_event.write(remaining)
-            await self._wrap_event.read()
+                await self._wait_wrap()
 
                 # wrap around and trim already written bytes
                 self._ptr = 0
@@ -152,49 +211,69 @@ class RingBuffSender(trio.abc.SendStream):
     async def wait_send_all_might_not_block(self):
         raise NotImplementedError
 
-    async def aclose(self):
+    def open(self):
-        self._write_event.close()
+        self._shm = SharedMemory(
-        self._wrap_event.close()
+            name=self._token.shm_name,
-        self._shm.close()
+            size=self._token.buf_size,
-
+            create=False
-    async def __aenter__(self):
+        )
         self._write_event.open()
         self._wrap_event.open()
+        self._eof_event.open()
+
+    def close(self):
+        self._eof_event.write(
+            self._ptr if self._ptr > 0 else self.size
+        )
+
+        if self._cleanup:
+            self._write_event.close()
+            self._wrap_event.close()
+            self._eof_event.close()
+            self._shm.close()
+
+    async def aclose(self):
+        async with self._send_lock:
+            self.close()
+
+    async def __aenter__(self):
+        self.open()
         return self
 
 
 class RingBuffReceiver(trio.abc.ReceiveStream):
     '''
-    IPC Reliable Ring Buffer receiver side implementation
+    Ring Buffer receiver side implementation
 
-    `eventfd(2)` is used for wrap around sync, and also to signal
+    Do not use directly! manage with `attach_to_ringbuf_receiver`
-    writes to the reader.
+    after having opened a ringbuf context with `open_ringbuf`.
 
     '''
     def __init__(
         self,
         token: RBToken,
-        start_ptr: int = 0,
+        cleanup: bool = True,
-        flags: int = 0
     ):
-        token = RBToken.from_msg(token)
+        self._token = RBToken.from_msg(token)
-        self._shm = SharedMemory(
+        self._shm: SharedMemory | None = None
-            name=token.shm_name,
+        self._write_event = EventFD(self._token.write_eventfd, 'w')
-            size=token.buf_size,
+        self._wrap_event = EventFD(self._token.wrap_eventfd, 'r')
-            create=False
+        self._eof_event = EventFD(self._token.eof_eventfd, 'r')
-        )
+        self._ptr: int = 0
-        self._write_event = EventFD(token.write_eventfd, 'w')
+        self._write_ptr: int = 0
-        self._wrap_event = EventFD(token.wrap_eventfd, 'r')
+        self._end_ptr: int = -1
-        self._ptr = start_ptr
+
-        self._flags = flags
+        self._cleanup: bool = cleanup
 
     @property
-    def key(self) -> str:
+    def name(self) -> str:
+        if not self._shm:
+            raise ValueError('shared memory not initialized yet!')
         return self._shm.name
 
     @property
     def size(self) -> int:
-        return self._shm.size
+        return self._token.buf_size
 
     @property
     def ptr(self) -> int:
@@ -208,46 +287,368 @@ class RingBuffReceiver(trio.abc.ReceiveStream):
     def wrap_fd(self) -> int:
         return self._wrap_event.fd
 
-    async def receive_some(
+    async def _eof_monitor_task(self):
-        self,
+        '''
-        max_bytes: int | None = None,
+        Long running EOF event monitor, automatically run in bg by
-        nb_timeout: float = 0.1
+        `attach_to_ringbuf_receiver` context manager, if EOF event
-    ) -> memoryview:
+        is set its value will be the end pointer (highest valid
-        # if non blocking eventfd enabled, do polling
+        index to be read from buf, after setting the `self._end_ptr`
-        # until next write, this allows signal handling
+        we close the write event which should cancel any blocked
-        if self._flags | EFD_NONBLOCK:
+        `self._write_event.read()`s on it.
-            delta = None
+
-            while delta is None:
+        '''
+        try:
+            self._end_ptr = await self._eof_event.read()
+            self._write_event.close()
+
+        except EFDReadCancelled:
+            ...
+
+        except trio.Cancelled:
+            ...
+
+    async def receive_some(self, max_bytes: int | None = None) -> bytes:
+        '''
+        Receive up to `max_bytes`, if no `max_bytes` is provided
+        a reasonable default is used.
+
+        '''
+        if max_bytes is None:
+            max_bytes: int = _DEFAULT_RB_SIZE
+
+        if max_bytes < 1:
+            raise ValueError("max_bytes must be >= 1")
+
+        # delta is remaining bytes we havent read
+        delta = self._write_ptr - self._ptr
+        if delta == 0:
+            # we have read all we can, see if new data is available
+            if self._end_ptr < 0:
+                # if we havent been signaled about EOF yet
                 try:
                     delta = await self._write_event.read()
+                    self._write_ptr += delta
 
-                except OSError as e:
+                except EFDReadCancelled:
-                    if e.errno == 'EAGAIN':
+                    # while waiting for new data `self._write_event` was closed
-                        continue
+                    # this means writer signaled EOF
-
+                    if self._end_ptr > 0:
-                    raise e
+                        # final self._write_ptr modification and recalculate delta
+                        self._write_ptr = self._end_ptr
+                        delta = self._end_ptr - self._ptr
 
                     else:
-            delta = await self._write_event.read()
+                        # shouldnt happen cause self._eof_monitor_task always sets
+                        # self._end_ptr before closing self._write_event
+                        raise InternalError(
+                            'self._write_event.read cancelled but self._end_ptr is not set'
+                        )
+
+            else:
+                # no more bytes to read and self._end_ptr set, EOF reached
+                return b''
+
+        # dont overflow caller
+        delta = min(delta, max_bytes)
+
+        target_ptr = self._ptr + delta
 
         # fetch next segment and advance ptr
-        next_ptr = self._ptr + delta
+        segment = bytes(self._shm.buf[self._ptr:target_ptr])
-        segment = self._shm.buf[self._ptr:next_ptr]
+        self._ptr = target_ptr
-        self._ptr = next_ptr
 
-        if self.ptr == self.size:
+        if self._ptr == self.size:
             # reached the end, signal wrap around
             self._ptr = 0
+            self._write_ptr = 0
             self._wrap_event.write(1)
 
         return segment
 
-    async def aclose(self):
+    def open(self):
-        self._write_event.close()
+        self._shm = SharedMemory(
-        self._wrap_event.close()
+            name=self._token.shm_name,
-        self._shm.close()
+            size=self._token.buf_size,
-
+            create=False
-    async def __aenter__(self):
+        )
         self._write_event.open()
         self._wrap_event.open()
+        self._eof_event.open()
+
+    def close(self):
+        if self._cleanup:
+            self._write_event.close()
+            self._wrap_event.close()
+            self._eof_event.close()
+            self._shm.close()
+
+    async def aclose(self):
+        self.close()
+
+    async def __aenter__(self):
+        self.open()
         return self
+
+
+@acm
+async def attach_to_ringbuf_receiver(
+    token: RBToken,
+    cleanup: bool = True
+) -> AsyncContextManager[RingBuffReceiver]:
+    '''
+    Attach a RingBuffReceiver from a previously opened
+    RBToken.
+
+    Launches `receiver._eof_monitor_task` in a `trio.Nursery`.
+    '''
+    async with (
+        trio.open_nursery() as n,
+        RingBuffReceiver(
+            token,
+            cleanup=cleanup
+        ) as receiver
+    ):
+        n.start_soon(receiver._eof_monitor_task)
+        yield receiver
+
+
+@acm
+async def attach_to_ringbuf_sender(
+    token: RBToken,
+    cleanup: bool = True
+) -> AsyncContextManager[RingBuffSender]:
+    '''
+    Attach a RingBuffSender from a previously opened
+    RBToken.
+
+    '''
+    async with RingBuffSender(
+        token,
+        cleanup=cleanup
+    ) as sender:
+        yield sender
+
+
+@cm
+def open_ringbuf_pair(
+    name: str,
+    buf_size: int = _DEFAULT_RB_SIZE
+) -> ContextManager[tuple(RBToken, RBToken)]:
+    '''
+    Handle resources for a ringbuf pair to be used for
+    bidirectional messaging.
+
+    '''
+    with (
+        open_ringbuf(
+            name + '.pair0',
+            buf_size=buf_size
+        ) as token_0,
+
+        open_ringbuf(
+            name + '.pair1',
+            buf_size=buf_size
+        ) as token_1
+    ):
+        yield token_0, token_1
+
+
+@acm
+async def attach_to_ringbuf_stream(
+    token_in: RBToken,
+    token_out: RBToken,
+    cleanup_in: bool = True,
+    cleanup_out: bool = True
+) -> AsyncContextManager[trio.StapledStream]:
+    '''
+    Attach a trio.StapledStream from a previously opened
+    ringbuf pair.
+
+    '''
+    async with (
+        attach_to_ringbuf_receiver(
+            token_in,
+            cleanup=cleanup_in
+        ) as receiver,
+        attach_to_ringbuf_sender(
+            token_out,
+            cleanup=cleanup_out
+        ) as sender,
+    ):
+        yield trio.StapledStream(sender, receiver)
+
+
+
+class RingBuffBytesSender(trio.abc.SendChannel[bytes]):
+    '''
+    In order to guarantee full messages are received, all bytes
+    sent by `RingBuffBytesSender` are preceded with a 4 byte header
+    which decodes into a uint32 indicating the actual size of the
+    next payload.
+
+    Optional batch mode:
+
+    If `batch_size` > 1 messages wont get sent immediately but will be
+    stored until `batch_size` messages are pending, then it will send
+    them all at once.
+
+    `batch_size` can be changed dynamically but always call, `flush()`
+    right before.
+
+    '''
+    def __init__(
+        self,
+        sender: RingBuffSender,
+        batch_size: int = 1
+    ):
+        self._sender = sender
+        self.batch_size = batch_size
+        self._batch_msg_len = 0
+        self._batch: bytes = b''
+
+    async def flush(self) -> None:
+        await self._sender.send_all(self._batch)
+        self._batch = b''
+        self._batch_msg_len = 0
+
+    async def send(self, value: bytes) -> None:
+        msg: bytes = struct.pack("<I", len(value)) + value
+        if self.batch_size == 1:
+            await self._sender.send_all(msg)
+            return
+
+        self._batch += msg
+        self._batch_msg_len += 1
+        if self._batch_msg_len == self.batch_size:
+            await self.flush()
+
+
+    async def aclose(self) -> None:
+        await self._sender.aclose()
+
+
+class RingBuffBytesReceiver(trio.abc.ReceiveChannel[bytes]):
+    '''
+    See `RingBuffBytesSender` docstring.
+
+    A `tricycle.BufferedReceiveStream` is used for the
+    `receive_exactly` API.
+    '''
+    def __init__(
+        self,
+        receiver: RingBuffReceiver
+    ):
+        self._receiver = receiver
+
+    async def _receive_exactly(self, num_bytes: int) -> bytes:
+        '''
+        Fetch bytes from receiver until we read exactly `num_bytes`
+        or end of stream is signaled.
+
+        '''
+        payload = b''
+        while len(payload) < num_bytes:
+            remaining = num_bytes - len(payload)
+
+            new_bytes = await self._receiver.receive_some(
+                max_bytes=remaining
+            )
+
+            if new_bytes == b'':
+                raise trio.EndOfChannel
+
+            payload += new_bytes
+
+        return payload
+
+    async def receive(self) -> bytes:
+        header: bytes = await self._receive_exactly(4)
+        size: int
+        size, = struct.unpack("<I", header)
+        if size == 0:
+            raise trio.EndOfChannel
+        return await self._receive_exactly(size)
+
+    async def aclose(self) -> None:
+        await self._receiver.aclose()
+
+
+@acm
+async def attach_to_ringbuf_rchannel(
+    token: RBToken,
+    cleanup: bool = True
+) -> AsyncContextManager[RingBuffBytesReceiver]:
+    '''
+    Attach a RingBuffBytesReceiver from a previously opened
+    RBToken.
+    '''
+    async with attach_to_ringbuf_receiver(
+        token, cleanup=cleanup
+    ) as receiver:
+        yield RingBuffBytesReceiver(receiver)
+
+
+@acm
+async def attach_to_ringbuf_schannel(
+    token: RBToken,
+    cleanup: bool = True,
+    batch_size: int = 1,
+) -> AsyncContextManager[RingBuffBytesSender]:
+    '''
+    Attach a RingBuffBytesSender from a previously opened
+    RBToken.
+    '''
+    async with attach_to_ringbuf_sender(
+        token, cleanup=cleanup
+    ) as sender:
+        yield RingBuffBytesSender(sender, batch_size=batch_size)
+
+
+class RingBuffChannel(trio.abc.Channel[bytes]):
+    '''
+    Combine `RingBuffBytesSender` and `RingBuffBytesReceiver`
+    in order to expose the bidirectional `trio.abc.Channel` API.
+
+    '''
+    def __init__(
+        self,
+        sender: RingBuffBytesSender,
+        receiver: RingBuffBytesReceiver
+    ):
+        self._sender = sender
+        self._receiver = receiver
+
+    async def send(self, value: bytes):
+        await self._sender.send(value)
+
+    async def receive(self) -> bytes:
+        return await self._receiver.receive()
+
+    async def aclose(self):
+        await self._receiver.aclose()
+        await self._sender.aclose()
+
+
+@acm
+async def attach_to_ringbuf_channel(
+    token_in: RBToken,
+    token_out: RBToken,
+    cleanup_in: bool = True,
+    cleanup_out: bool = True
+) -> AsyncContextManager[RingBuffChannel]:
+    '''
+    Attach to an already opened ringbuf pair and return
+    a `RingBuffChannel`.
+
+    '''
+    async with (
+        attach_to_ringbuf_rchannel(
+            token_in,
+            cleanup=cleanup_in
+        ) as receiver,
+        attach_to_ringbuf_schannel(
+            token_out,
+            cleanup=cleanup_out
+        ) as sender,
+    ):
+        yield RingBuffChannel(sender, receiver)

tractor/ipc/_tcp.py

@@ -18,389 +18,88 @@ TCP implementation of tractor.ipc._transport.MsgTransport protocol
 
 '''
 from __future__ import annotations
-from collections.abc import (
-    AsyncGenerator,
-    AsyncIterator,
-)
-import struct
-from typing import (
-    Any,
-    Callable,
-    Type,
-)
 
-import msgspec
-from tricycle import BufferedReceiveStream
 import trio
 
+from tractor.msg import MsgCodec
 from tractor.log import get_logger
-from tractor._exceptions import (
+from tractor._addr import TCPAddress
-    MsgTypeError,
+from tractor.ipc._transport import MsgpackTransport
-    TransportClosed,
-    _mk_send_mte,
-    _mk_recv_mte,
-)
-from tractor.msg import (
-    _ctxvar_MsgCodec,
-    # _codec,  XXX see `self._codec` sanity/debug checks
-    MsgCodec,
-    types as msgtypes,
-    pretty_struct,
-)
-from tractor.ipc import MsgTransport
 
 
 log = get_logger(__name__)
 
 
-def get_stream_addrs(
-    stream: trio.SocketStream
-) -> tuple[
-    tuple[str, int],  # local
-    tuple[str, int],  # remote
-]:
-    '''
-    Return the `trio` streaming transport prot's socket-addrs for
-    both the local and remote sides as a pair.
-
-    '''
-    # rn, should both be IP sockets
-    lsockname = stream.socket.getsockname()
-    rsockname = stream.socket.getpeername()
-    return (
-        tuple(lsockname[:2]),
-        tuple(rsockname[:2]),
-    )
-
-
 # TODO: typing oddity.. not sure why we have to inherit here, but it
 # seems to be an issue with `get_msg_transport()` returning
 # a `Type[Protocol]`; probably should make a `mypy` issue?
-class MsgpackTCPStream(MsgTransport):
+class MsgpackTCPStream(MsgpackTransport):
     '''
     A ``trio.SocketStream`` delivering ``msgpack`` formatted data
     using the ``msgspec`` codec lib.
 
     '''
+    address_type = TCPAddress
     layer_key: int = 4
-    name_key: str = 'tcp'
 
-    # TODO: better naming for this?
+    # def __init__(
-    # -[ ] check how libp2p does naming for such things?
+    #     self,
-    codec_key: str = 'msgpack'
+    #     stream: trio.SocketStream,
+    #     prefix_size: int = 4,
+    #     codec: CodecType = None,
 
-    def __init__(
+    # ) -> None:
-        self,
+    #     super().__init__(
-        stream: trio.SocketStream,
+    #         stream,
-        prefix_size: int = 4,
+    #         prefix_size=prefix_size,
-
+    #         codec=codec
-        # XXX optionally provided codec pair for `msgspec`:
-        # https://jcristharif.com/msgspec/extending.html#mapping-to-from-native-types
-        #
-        # TODO: define this as a `Codec` struct which can be
-        # overriden dynamically by the application/runtime?
-        codec: tuple[
-            Callable[[Any], Any]|None,  # coder
-            Callable[[type, Any], Any]|None,  # decoder
-        ]|None = None,
-
-    ) -> None:
-
-        self.stream = stream
-        assert self.stream.socket
-
-        # should both be IP sockets
-        self._laddr, self._raddr = get_stream_addrs(stream)
-
-        # create read loop instance
-        self._aiter_pkts = self._iter_packets()
-        self._send_lock = trio.StrictFIFOLock()
-
-        # public i guess?
-        self.drained: list[dict] = []
-
-        self.recv_stream = BufferedReceiveStream(
-            transport_stream=stream
-        )
-        self.prefix_size = prefix_size
-
-        # allow for custom IPC msg interchange format
-        # dynamic override Bo
-        self._task = trio.lowlevel.current_task()
-
-        # XXX for ctxvar debug only!
-        # self._codec: MsgCodec = (
-        #     codec
-        #     or
-        #     _codec._ctxvar_MsgCodec.get()
     #     )
 
-    async def _iter_packets(self) -> AsyncGenerator[dict, None]:
-        '''
-        Yield `bytes`-blob decoded packets from the underlying TCP
-        stream using the current task's `MsgCodec`.
-
-        This is a streaming routine implemented as an async generator
-        func (which was the original design, but could be changed?)
-        and is allocated by a `.__call__()` inside `.__init__()` where
-        it is assigned to the `._aiter_pkts` attr.
-
-        '''
-        decodes_failed: int = 0
-
-        while True:
-            try:
-                header: bytes = await self.recv_stream.receive_exactly(4)
-            except (
-                ValueError,
-                ConnectionResetError,
-
-                # not sure entirely why we need this but without it we
-                # seem to be getting racy failures here on
-                # arbiter/registry name subs..
-                trio.BrokenResourceError,
-
-            ) as trans_err:
-
-                loglevel = 'transport'
-                match trans_err:
-                    # case (
-                    #     ConnectionResetError()
-                    # ):
-                    #     loglevel = 'transport'
-
-                    # peer actor (graceful??) TCP EOF but `tricycle`
-                    # seems to raise a 0-bytes-read?
-                    case ValueError() if (
-                        'unclean EOF' in trans_err.args[0]
-                    ):
-                        pass
-
-                    # peer actor (task) prolly shutdown quickly due
-                    # to cancellation
-                    case trio.BrokenResourceError() if (
-                        'Connection reset by peer' in trans_err.args[0]
-                    ):
-                        pass
-
-                    # unless the disconnect condition falls under "a
-                    # normal operation breakage" we usualy console warn
-                    # about it.
-                    case _:
-                        loglevel: str = 'warning'
-
-
-                raise TransportClosed(
-                    message=(
-                        f'IPC transport already closed by peer\n'
-                        f'x)> {type(trans_err)}\n'
-                        f' |_{self}\n'
-                    ),
-                    loglevel=loglevel,
-                ) from trans_err
-
-            # XXX definitely can happen if transport is closed
-            # manually by another `trio.lowlevel.Task` in the
-            # same actor; we use this in some simulated fault
-            # testing for ex, but generally should never happen
-            # under normal operation!
-            #
-            # NOTE: as such we always re-raise this error from the
-            #       RPC msg loop!
-            except trio.ClosedResourceError as closure_err:
-                raise TransportClosed(
-                    message=(
-                        f'IPC transport already manually closed locally?\n'
-                        f'x)> {type(closure_err)} \n'
-                        f' |_{self}\n'
-                    ),
-                    loglevel='error',
-                    raise_on_report=(
-                        closure_err.args[0] == 'another task closed this fd'
-                        or
-                        closure_err.args[0] in ['another task closed this fd']
-                    ),
-                ) from closure_err
-
-            # graceful TCP EOF disconnect
-            if header == b'':
-                raise TransportClosed(
-                    message=(
-                        f'IPC transport already gracefully closed\n'
-                        f')>\n'
-                        f'|_{self}\n'
-                    ),
-                    loglevel='transport',
-                    # cause=???  # handy or no?
-                )
-
-            size: int
-            size, = struct.unpack("<I", header)
-
-            log.transport(f'received header {size}')  # type: ignore
-            msg_bytes: bytes = await self.recv_stream.receive_exactly(size)
-
-            log.transport(f"received {msg_bytes}")  # type: ignore
-            try:
-                # NOTE: lookup the `trio.Task.context`'s var for
-                # the current `MsgCodec`.
-                codec: MsgCodec = _ctxvar_MsgCodec.get()
-
-                # XXX for ctxvar debug only!
-                # if self._codec.pld_spec != codec.pld_spec:
-                #     assert (
-                #         task := trio.lowlevel.current_task()
-                #     ) is not self._task
-                #     self._task = task
-                #     self._codec = codec
-                #     log.runtime(
-                #         f'Using new codec in {self}.recv()\n'
-                #         f'codec: {self._codec}\n\n'
-                #         f'msg_bytes: {msg_bytes}\n'
-                #     )
-                yield codec.decode(msg_bytes)
-
-            # XXX NOTE: since the below error derives from
-            # `DecodeError` we need to catch is specially
-            # and always raise such that spec violations
-            # are never allowed to be caught silently!
-            except msgspec.ValidationError as verr:
-                msgtyperr: MsgTypeError = _mk_recv_mte(
-                    msg=msg_bytes,
-                    codec=codec,
-                    src_validation_error=verr,
-                )
-                # XXX deliver up to `Channel.recv()` where
-                # a re-raise and `Error`-pack can inject the far
-                # end actor `.uid`.
-                yield msgtyperr
-
-            except (
-                msgspec.DecodeError,
-                UnicodeDecodeError,
-            ):
-                if decodes_failed < 4:
-                    # ignore decoding errors for now and assume they have to
-                    # do with a channel drop - hope that receiving from the
-                    # channel will raise an expected error and bubble up.
-                    try:
-                        msg_str: str|bytes = msg_bytes.decode()
-                    except UnicodeDecodeError:
-                        msg_str = msg_bytes
-
-                    log.exception(
-                        'Failed to decode msg?\n'
-                        f'{codec}\n\n'
-                        'Rxed bytes from wire:\n\n'
-                        f'{msg_str!r}\n'
-                    )
-                    decodes_failed += 1
-                else:
-                    raise
-
-    async def send(
-        self,
-        msg: msgtypes.MsgType,
-
-        strict_types: bool = True,
-        hide_tb: bool = False,
-
-    ) -> None:
-        '''
-        Send a msgpack encoded py-object-blob-as-msg over TCP.
-
-        If `strict_types == True` then a `MsgTypeError` will be raised on any
-        invalid msg type
-
-        '''
-        __tracebackhide__: bool = hide_tb
-
-        # XXX see `trio._sync.AsyncContextManagerMixin` for details
-        # on the `.acquire()`/`.release()` sequencing..
-        async with self._send_lock:
-
-            # NOTE: lookup the `trio.Task.context`'s var for
-            # the current `MsgCodec`.
-            codec: MsgCodec = _ctxvar_MsgCodec.get()
-
-            # XXX for ctxvar debug only!
-            # if self._codec.pld_spec != codec.pld_spec:
-            #     self._codec = codec
-            #     log.runtime(
-            #         f'Using new codec in {self}.send()\n'
-            #         f'codec: {self._codec}\n\n'
-            #         f'msg: {msg}\n'
-            #     )
-
-            if type(msg) not in msgtypes.__msg_types__:
-                if strict_types:
-                    raise _mk_send_mte(
-                        msg,
-                        codec=codec,
-                    )
-                else:
-                    log.warning(
-                        'Sending non-`Msg`-spec msg?\n\n'
-                        f'{msg}\n'
-                    )
-
-            try:
-                bytes_data: bytes = codec.encode(msg)
-            except TypeError as _err:
-                typerr = _err
-                msgtyperr: MsgTypeError = _mk_send_mte(
-                    msg,
-                    codec=codec,
-                    message=(
-                        f'IPC-msg-spec violation in\n\n'
-                        f'{pretty_struct.Struct.pformat(msg)}'
-                    ),
-                    src_type_error=typerr,
-                )
-                raise msgtyperr from typerr
-
-            # supposedly the fastest says,
-            # https://stackoverflow.com/a/54027962
-            size: bytes = struct.pack("<I", len(bytes_data))
-            return await self.stream.send_all(size + bytes_data)
-
-        # ?TODO? does it help ever to dynamically show this
-        # frame?
-        # try:
-        #     <the-above_code>
-        # except BaseException as _err:
-        #     err = _err
-        #     if not isinstance(err, MsgTypeError):
-        #         __tracebackhide__: bool = False
-        #     raise
-
     @property
-    def laddr(self) -> tuple[str, int]:
+    def maddr(self) -> str:
-        return self._laddr
+        host, port = self.raddr.unwrap()
+        return (
+            f'/ipv4/{host}'
+            f'/{self.address_type.name_key}/{port}'
+            # f'/{self.chan.uid[0]}'
+            # f'/{self.cid}'
 
-    @property
+            # f'/cid={cid_head}..{cid_tail}'
-    def raddr(self) -> tuple[str, int]:
+            # TODO: ? not use this ^ right ?
-        return self._raddr
+        )
-
-    async def recv(self) -> Any:
-        return await self._aiter_pkts.asend(None)
-
-    async def drain(self) -> AsyncIterator[dict]:
-        '''
-        Drain the stream's remaining messages sent from
-        the far end until the connection is closed by
-        the peer.
-
-        '''
-        try:
-            async for msg in self._iter_packets():
-                self.drained.append(msg)
-        except TransportClosed:
-            for msg in self.drained:
-                yield msg
-
-    def __aiter__(self):
-        return self._aiter_pkts
 
     def connected(self) -> bool:
         return self.stream.socket.fileno() != -1
+
+    @classmethod
+    async def connect_to(
+        cls,
+        destaddr: TCPAddress,
+        prefix_size: int = 4,
+        codec: MsgCodec|None = None,
+        **kwargs
+    ) -> MsgpackTCPStream:
+        stream = await trio.open_tcp_stream(
+            *destaddr.unwrap(),
+            **kwargs
+        )
+        return MsgpackTCPStream(
+            stream,
+            prefix_size=prefix_size,
+            codec=codec
+        )
+
+    @classmethod
+    def get_stream_addrs(
+        cls,
+        stream: trio.SocketStream
+    ) -> tuple[
+        tuple[str, int],
+        tuple[str, int]
+    ]:
+        lsockname = stream.socket.getsockname()
+        rsockname = stream.socket.getpeername()
+        return (
+            TCPAddress.from_addr(tuple(lsockname[:2])),
+            TCPAddress.from_addr(tuple(rsockname[:2])),
+        )

tractor/ipc/_transport.py

@@ -18,13 +18,45 @@ typing.Protocol based generic msg API, implement this class to add backends for
 tractor.ipc.Channel
 
 '''
-import trio
+from __future__ import annotations
 from typing import (
     runtime_checkable,
+    Type,
     Protocol,
     TypeVar,
+    ClassVar
 )
-from collections.abc import AsyncIterator
+from collections.abc import (
+    AsyncGenerator,
+    AsyncIterator,
+)
+import struct
+
+import trio
+import msgspec
+from tricycle import BufferedReceiveStream
+
+from tractor.log import get_logger
+from tractor._exceptions import (
+    MsgTypeError,
+    TransportClosed,
+    _mk_send_mte,
+    _mk_recv_mte,
+)
+from tractor.msg import (
+    _ctxvar_MsgCodec,
+    # _codec,  XXX see `self._codec` sanity/debug checks
+    MsgCodec,
+    types as msgtypes,
+    pretty_struct,
+)
+from tractor._addr import Address
+
+log = get_logger(__name__)
+
+
+# (codec, transport)
+MsgTransportKey = tuple[str, str]
 
 
 # from tractor.msg.types import MsgType
@@ -41,11 +73,11 @@ class MsgTransport(Protocol[MsgType]):
 # eventual msg definition/types?
 # - https://docs.python.org/3/library/typing.html#typing.Protocol
 
-    stream: trio.SocketStream
+    stream: trio.abc.Stream
     drained: list[MsgType]
 
-    def __init__(self, stream: trio.SocketStream) -> None:
+    address_type: ClassVar[Type[Address]]
-        ...
+    codec_key: ClassVar[str]
 
     # XXX: should this instead be called `.sendall()`?
     async def send(self, msg: MsgType) -> None:
@@ -65,10 +97,354 @@ class MsgTransport(Protocol[MsgType]):
     def drain(self) -> AsyncIterator[dict]:
         ...
 
+    @classmethod
+    def key(cls) -> MsgTransportKey:
+        return cls.codec_key, cls.address_type.name_key
+
     @property
-    def laddr(self) -> tuple[str, int]:
+    def laddr(self) -> Address:
         ...
 
     @property
-    def raddr(self) -> tuple[str, int]:
+    def raddr(self) -> Address:
         ...
+
+    @property
+    def maddr(self) -> str:
+        ...
+
+    @classmethod
+    async def connect_to(
+        cls,
+        addr: Address,
+        **kwargs
+    ) -> MsgTransport:
+        ...
+
+    @classmethod
+    def get_stream_addrs(
+        cls,
+        stream: trio.abc.Stream
+    ) -> tuple[
+        Address,  # local
+        Address   # remote
+    ]:
+        '''
+        Return the `trio` streaming transport prot's addrs for both
+        the local and remote sides as a pair.
+
+        '''
+        ...
+
+
+class MsgpackTransport(MsgTransport):
+
+    # TODO: better naming for this?
+    # -[ ] check how libp2p does naming for such things?
+    codec_key: str = 'msgpack'
+
+    def __init__(
+        self,
+        stream: trio.abc.Stream,
+        prefix_size: int = 4,
+
+        # XXX optionally provided codec pair for `msgspec`:
+        # https://jcristharif.com/msgspec/extending.html#mapping-to-from-native-types
+        #
+        # TODO: define this as a `Codec` struct which can be
+        # overriden dynamically by the application/runtime?
+        codec: MsgCodec = None,
+
+    ) -> None:
+        self.stream = stream
+        self._laddr, self._raddr = self.get_stream_addrs(stream)
+
+        # create read loop instance
+        self._aiter_pkts = self._iter_packets()
+        self._send_lock = trio.StrictFIFOLock()
+
+        # public i guess?
+        self.drained: list[dict] = []
+
+        self.recv_stream = BufferedReceiveStream(
+            transport_stream=stream
+        )
+        self.prefix_size = prefix_size
+
+        # allow for custom IPC msg interchange format
+        # dynamic override Bo
+        self._task = trio.lowlevel.current_task()
+
+        # XXX for ctxvar debug only!
+        # self._codec: MsgCodec = (
+        #     codec
+        #     or
+        #     _codec._ctxvar_MsgCodec.get()
+        # )
+
+    async def _iter_packets(self) -> AsyncGenerator[dict, None]:
+        '''
+        Yield `bytes`-blob decoded packets from the underlying TCP
+        stream using the current task's `MsgCodec`.
+
+        This is a streaming routine implemented as an async generator
+        func (which was the original design, but could be changed?)
+        and is allocated by a `.__call__()` inside `.__init__()` where
+        it is assigned to the `._aiter_pkts` attr.
+
+        '''
+        decodes_failed: int = 0
+
+        while True:
+            try:
+                header: bytes = await self.recv_stream.receive_exactly(4)
+            except (
+                ValueError,
+                ConnectionResetError,
+
+                # not sure entirely why we need this but without it we
+                # seem to be getting racy failures here on
+                # arbiter/registry name subs..
+                trio.BrokenResourceError,
+
+            ) as trans_err:
+
+                loglevel = 'transport'
+                match trans_err:
+                    # case (
+                    #     ConnectionResetError()
+                    # ):
+                    #     loglevel = 'transport'
+
+                    # peer actor (graceful??) TCP EOF but `tricycle`
+                    # seems to raise a 0-bytes-read?
+                    case ValueError() if (
+                        'unclean EOF' in trans_err.args[0]
+                    ):
+                        pass
+
+                    # peer actor (task) prolly shutdown quickly due
+                    # to cancellation
+                    case trio.BrokenResourceError() if (
+                        'Connection reset by peer' in trans_err.args[0]
+                    ):
+                        pass
+
+                    # unless the disconnect condition falls under "a
+                    # normal operation breakage" we usualy console warn
+                    # about it.
+                    case _:
+                        loglevel: str = 'warning'
+
+
+                raise TransportClosed(
+                    message=(
+                        f'IPC transport already closed by peer\n'
+                        f'x)> {type(trans_err)}\n'
+                        f' |_{self}\n'
+                    ),
+                    loglevel=loglevel,
+                ) from trans_err
+
+            # XXX definitely can happen if transport is closed
+            # manually by another `trio.lowlevel.Task` in the
+            # same actor; we use this in some simulated fault
+            # testing for ex, but generally should never happen
+            # under normal operation!
+            #
+            # NOTE: as such we always re-raise this error from the
+            #       RPC msg loop!
+            except trio.ClosedResourceError as closure_err:
+                raise TransportClosed(
+                    message=(
+                        f'IPC transport already manually closed locally?\n'
+                        f'x)> {type(closure_err)} \n'
+                        f' |_{self}\n'
+                    ),
+                    loglevel='error',
+                    raise_on_report=(
+                        closure_err.args[0] == 'another task closed this fd'
+                        or
+                        closure_err.args[0] in ['another task closed this fd']
+                    ),
+                ) from closure_err
+
+            # graceful TCP EOF disconnect
+            if header == b'':
+                raise TransportClosed(
+                    message=(
+                        f'IPC transport already gracefully closed\n'
+                        f')>\n'
+                        f'|_{self}\n'
+                    ),
+                    loglevel='transport',
+                    # cause=???  # handy or no?
+                )
+
+            size: int
+            size, = struct.unpack("<I", header)
+
+            log.transport(f'received header {size}')  # type: ignore
+            msg_bytes: bytes = await self.recv_stream.receive_exactly(size)
+
+            log.transport(f"received {msg_bytes}")  # type: ignore
+            try:
+                # NOTE: lookup the `trio.Task.context`'s var for
+                # the current `MsgCodec`.
+                codec: MsgCodec = _ctxvar_MsgCodec.get()
+
+                # XXX for ctxvar debug only!
+                # if self._codec.pld_spec != codec.pld_spec:
+                #     assert (
+                #         task := trio.lowlevel.current_task()
+                #     ) is not self._task
+                #     self._task = task
+                #     self._codec = codec
+                #     log.runtime(
+                #         f'Using new codec in {self}.recv()\n'
+                #         f'codec: {self._codec}\n\n'
+                #         f'msg_bytes: {msg_bytes}\n'
+                #     )
+                yield codec.decode(msg_bytes)
+
+            # XXX NOTE: since the below error derives from
+            # `DecodeError` we need to catch is specially
+            # and always raise such that spec violations
+            # are never allowed to be caught silently!
+            except msgspec.ValidationError as verr:
+                msgtyperr: MsgTypeError = _mk_recv_mte(
+                    msg=msg_bytes,
+                    codec=codec,
+                    src_validation_error=verr,
+                )
+                # XXX deliver up to `Channel.recv()` where
+                # a re-raise and `Error`-pack can inject the far
+                # end actor `.uid`.
+                yield msgtyperr
+
+            except (
+                msgspec.DecodeError,
+                UnicodeDecodeError,
+            ):
+                if decodes_failed < 4:
+                    # ignore decoding errors for now and assume they have to
+                    # do with a channel drop - hope that receiving from the
+                    # channel will raise an expected error and bubble up.
+                    try:
+                        msg_str: str|bytes = msg_bytes.decode()
+                    except UnicodeDecodeError:
+                        msg_str = msg_bytes
+
+                    log.exception(
+                        'Failed to decode msg?\n'
+                        f'{codec}\n\n'
+                        'Rxed bytes from wire:\n\n'
+                        f'{msg_str!r}\n'
+                    )
+                    decodes_failed += 1
+                else:
+                    raise
+
+    async def send(
+        self,
+        msg: msgtypes.MsgType,
+
+        strict_types: bool = True,
+        hide_tb: bool = False,
+
+    ) -> None:
+        '''
+        Send a msgpack encoded py-object-blob-as-msg over TCP.
+
+        If `strict_types == True` then a `MsgTypeError` will be raised on any
+        invalid msg type
+
+        '''
+        __tracebackhide__: bool = hide_tb
+
+        # XXX see `trio._sync.AsyncContextManagerMixin` for details
+        # on the `.acquire()`/`.release()` sequencing..
+        async with self._send_lock:
+
+            # NOTE: lookup the `trio.Task.context`'s var for
+            # the current `MsgCodec`.
+            codec: MsgCodec = _ctxvar_MsgCodec.get()
+
+            # XXX for ctxvar debug only!
+            # if self._codec.pld_spec != codec.pld_spec:
+            #     self._codec = codec
+            #     log.runtime(
+            #         f'Using new codec in {self}.send()\n'
+            #         f'codec: {self._codec}\n\n'
+            #         f'msg: {msg}\n'
+            #     )
+
+            if type(msg) not in msgtypes.__msg_types__:
+                if strict_types:
+                    raise _mk_send_mte(
+                        msg,
+                        codec=codec,
+                    )
+                else:
+                    log.warning(
+                        'Sending non-`Msg`-spec msg?\n\n'
+                        f'{msg}\n'
+                    )
+
+            try:
+                bytes_data: bytes = codec.encode(msg)
+            except TypeError as _err:
+                typerr = _err
+                msgtyperr: MsgTypeError = _mk_send_mte(
+                    msg,
+                    codec=codec,
+                    message=(
+                        f'IPC-msg-spec violation in\n\n'
+                        f'{pretty_struct.Struct.pformat(msg)}'
+                    ),
+                    src_type_error=typerr,
+                )
+                raise msgtyperr from typerr
+
+            # supposedly the fastest says,
+            # https://stackoverflow.com/a/54027962
+            size: bytes = struct.pack("<I", len(bytes_data))
+            return await self.stream.send_all(size + bytes_data)
+
+        # ?TODO? does it help ever to dynamically show this
+        # frame?
+        # try:
+        #     <the-above_code>
+        # except BaseException as _err:
+        #     err = _err
+        #     if not isinstance(err, MsgTypeError):
+        #         __tracebackhide__: bool = False
+        #     raise
+
+    async def recv(self) -> msgtypes.MsgType:
+        return await self._aiter_pkts.asend(None)
+
+    async def drain(self) -> AsyncIterator[dict]:
+        '''
+        Drain the stream's remaining messages sent from
+        the far end until the connection is closed by
+        the peer.
+
+        '''
+        try:
+            async for msg in self._iter_packets():
+                self.drained.append(msg)
+        except TransportClosed:
+            for msg in self.drained:
+                yield msg
+
+    def __aiter__(self):
+        return self._aiter_pkts
+
+    @property
+    def laddr(self) -> Address:
+        return self._laddr
+
+    @property
+    def raddr(self) -> Address:
+        return self._raddr

tractor/ipc/_types.py

@@ -0,0 +1,99 @@
+# tractor: structured concurrent "actors".
+# Copyright 2018-eternity Tyler Goodlet.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+from typing import Type
+
+import trio
+import socket
+
+from tractor._addr import Address
+from tractor.ipc._transport import (
+    MsgTransportKey,
+    MsgTransport
+)
+from tractor.ipc._tcp import MsgpackTCPStream
+from tractor.ipc._uds import MsgpackUDSStream
+
+
+# manually updated list of all supported msg transport types
+_msg_transports = [
+    MsgpackTCPStream,
+    MsgpackUDSStream
+]
+
+
+# convert a MsgTransportKey to the corresponding transport type
+_key_to_transport: dict[MsgTransportKey, Type[MsgTransport]] = {
+    cls.key(): cls
+    for cls in _msg_transports
+}
+
+# convert an Address wrapper to its corresponding transport type
+_addr_to_transport: dict[Type[Address], Type[MsgTransport]] = {
+    cls.address_type: cls
+    for cls in _msg_transports
+}
+
+
+def transport_from_addr(
+    addr: Address,
+    codec_key: str = 'msgpack',
+) -> Type[MsgTransport]:
+    '''
+    Given a destination address and a desired codec, find the
+    corresponding `MsgTransport` type.
+
+    '''
+    try:
+        return _addr_to_transport[type(addr)]
+
+    except KeyError:
+        raise NotImplementedError(
+            f'No known transport for address {repr(addr)}'
+        )
+
+
+def transport_from_stream(
+    stream: trio.abc.Stream,
+    codec_key: str = 'msgpack'
+) -> Type[MsgTransport]:
+    '''
+    Given an arbitrary `trio.abc.Stream` and a desired codec,
+    find the corresponding `MsgTransport` type.
+
+    '''
+    transport = None
+    if isinstance(stream, trio.SocketStream):
+        sock = stream.socket
+        match sock.family:
+            case socket.AF_INET | socket.AF_INET6:
+                transport = 'tcp'
+
+            case socket.AF_UNIX:
+                transport = 'uds'
+
+            case _:
+                raise NotImplementedError(
+                    f'Unsupported socket family: {sock.family}'
+                )
+
+    if not transport:
+        raise NotImplementedError(
+            f'Could not figure out transport type for stream type {type(stream)}'
+        )
+
+    key = (codec_key, transport)
+
+    return _key_to_transport[key]

tractor/ipc/_uds.py

@@ -0,0 +1,97 @@
+# tractor: structured concurrent "actors".
+# Copyright 2018-eternity Tyler Goodlet.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+'''
+Unix Domain Socket implementation of tractor.ipc._transport.MsgTransport protocol 
+
+'''
+from __future__ import annotations
+
+import trio
+
+from tractor.msg import MsgCodec
+from tractor.log import get_logger
+from tractor._addr import UDSAddress
+from tractor.ipc._transport import MsgpackTransport
+
+
+log = get_logger(__name__)
+
+
+class MsgpackUDSStream(MsgpackTransport):
+    '''
+    A ``trio.SocketStream`` delivering ``msgpack`` formatted data
+    using the ``msgspec`` codec lib.
+
+    '''
+    address_type = UDSAddress
+    layer_key: int = 7
+
+    # def __init__(
+    #     self,
+    #     stream: trio.SocketStream,
+    #     prefix_size: int = 4,
+    #     codec: CodecType = None,
+
+    # ) -> None:
+    #     super().__init__(
+    #         stream,
+    #         prefix_size=prefix_size,
+    #         codec=codec
+    #     )
+
+    @property
+    def maddr(self) -> str:
+        filepath = self.raddr.unwrap()
+        return (
+            f'/ipv4/localhost'
+            f'/{self.address_type.name_key}/{filepath}'
+            # f'/{self.chan.uid[0]}'
+            # f'/{self.cid}'
+
+            # f'/cid={cid_head}..{cid_tail}'
+            # TODO: ? not use this ^ right ?
+        )
+
+    def connected(self) -> bool:
+        return self.stream.socket.fileno() != -1
+
+    @classmethod
+    async def connect_to(
+        cls,
+        addr: UDSAddress,
+        prefix_size: int = 4,
+        codec: MsgCodec|None = None,
+        **kwargs
+    ) -> MsgpackUDSStream:
+        stream = await trio.open_unix_socket(
+            addr.unwrap(),
+            **kwargs
+        )
+        return MsgpackUDSStream(
+            stream,
+            prefix_size=prefix_size,
+            codec=codec
+        )
+
+    @classmethod
+    def get_stream_addrs(
+        cls,
+        stream: trio.SocketStream
+    ) -> tuple[UDSAddress, UDSAddress]:
+        return (
+            UDSAddress.from_addr(stream.socket.getsockname()),
+            UDSAddress.from_addr(stream.socket.getsockname()),
+        )

tractor/msg/types.py

@@ -47,6 +47,7 @@ from tractor.msg import (
     pretty_struct,
 )
 from tractor.log import get_logger
+from tractor._addr import AddressTypes
 
 
 log = get_logger('tractor.msgspec')
@@ -167,8 +168,8 @@ class SpawnSpec(
 
     # TODO: not just sockaddr pairs?
     # -[ ] abstract into a `TransportAddr` type?
-    reg_addrs: list[tuple[str, int]]
+    reg_addrs: list[AddressTypes]
-    bind_addrs: list[tuple[str, int]]
+    bind_addrs: list[AddressTypes]
 
 
 # TODO: caps based RPC support in the payload?