| Commit message (Collapse) | Author | Age |
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This is easier and agnostic about the underlying L3 protocol.
We plan to remove direct NNG_OPT_LOCADDR support from listeners
(and probably both NNG_OPT_LOCADDR and NNG_OPT_REMADDR have numbered
days left in their lifetime. They will be replaced with more direct
typed access functions as has been done for pipes already.)
While here fixed some include for IWYU in the POSIX platform.
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This is going to be used to facilitate debugging, and eliminate some
inconveniences around these things. We plan to move the pipe functions
to use these directly, hopefully moving away from the pipe_getopt hack.
(The transport API will need to grow these. For now this is just the
streams.)
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This change moves the posix pollers to inline the PFD and makes
the callbacks constant, so that we can dispense with tests, failures,
and locks. It is anticipated that this will reduce lock based
pressure on the bus and increase performance modestly.
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We reap the connections when closing, to ensure that the clean up is
done outside the pollq thread. This also reduces pressure on the
pollq, we think. But more importantly it eliminates some complex
code that was meant to avoid deadlocks, but ultimately created other
use-after-free challenges. This work is an enabler for further
simplifications in the aio/task logic. While here we converted some
potentially racy locking of the dialers and reference counts to simpler
lock-free reference counting.
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This reference counts both TCP and IPC dialers running on POSIX
configurations, as we need to take care not to destroy the dialer
until any streams associated with are completely destroyed.
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This is a major change, and includes changes to use a polymorphic
stream API for all transports. There have been related bugs fixed
along the way. Additionally the man pages have changed.
The old non-polymorphic APIs are removed now. This is a breaking
change, but the old APIs were never part of any released public API.
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This changes much of the internal API for TCP option handling, and
includes hooks for some of this in various consumers. Note that the
consumers still need to have additional work done to complete them,
which will be part of providing public "raw" TLS and WebSocket APIs.
We would also like to finish addressing the call sites of
nni_tcp_listener_start() that assume the sockaddr is modified --
it would be superior to use the NNG_OPT_LOCADDR option. Thaat will be
addressed in a follow up PR.
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This also fixes a leaked TCP connection on a failure path, which we
noticed while working this change.
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fixes #179 DNS resolution should be done at connect time
fixes #586 Windows IO completion port work could be better
fixes #339 Windows iocp could use synchronous completions
fixes #280 TCP abstraction improvements
This is a rather monstrous set of changes, which refactors TCP, and
the underlying Windows I/O completion path logic, in order to obtain
a cleaner, simpler API, with support for asynchronous DNS lookups performed
on connect rather than initialization time, the ability to have multiple
connects or accepts pending, as well as fewer extraneous function calls.
The Windows code also benefits from greatly reduced context switching,
fewer lock operations performed, and a reduced number of system calls
on the hot code path. (We use automatic event resetting instead of manual.)
Some dead code was removed as well, and a few potential edge case leaks
on failure paths (in the websocket code) were plugged.
Note that all TCP based transports benefit from this work. The IPC code
on Windows still uses the legacy IOCP for now, as does the UDP code (used
for ZeroTier.) We will be converting those soon too.
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