| Commit message (Collapse) | Author | Age |
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These functions can no longer fail.
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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 is part of our work to improve type safety/awareness, and also
improve debugger support, for NNG error codes. There are still quite
a few more but this should help.
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This will be slower, as each vector element has to be sent in a single
system call, but for platforms that lack sendmsg it will at least work.
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This will replace nni_aio_schedule, and it includes finishing the
task if needed. It does so without dropping the lock and so is
more efficient and race free.
This includes some conversion of some subsystems to it.
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The dialer aio needs to be set before starting the dial operation,
as the operation may complete right away.
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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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Some platforms or configurations may not have more modern options
like kqueue or epoll, or may be constrained by policy.
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This allows us to explicitly stop streams, dialers, and listeners,
before we start tearing down things. This hopefully will be useful
in resolving use-after-free bugs in http, tls, and websockets.
The new functions are not yet documented, but they are
nng_stream_stop, nng_stream_dialer_stop, and nng_stream_listener_stop.
They should be called after close, and before free. The close
functions now close without blocking, but the stop function is
allowed to block.
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This eliminates some code. A test is added as well, so this should
help with coverage.
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This is a sweeping cleanup of the transport logic around options,
and also harmonizes the names used when setting or getting options.
Additionally, legacy methods are now moved into a separate file and
can be elided via CMake or a preprocessor define.
Fundamentally, the ability to set to transport options via the socket
is deprecated; there are numerous problems with this and my earlier
approaches to deal with this have been somewhat misguided. Further
these approaches will not work with future protocol work that is
planned (were some options need to be negotiated with peers at the
time of connection establishment.)
Documentation has been updated to reflect this. The test suites still
make rather broad use of the older APIs, and will be converted later.
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fixes #1326 Linux IPC could use fchmod
fixes #1327 getsockname on ipc may not work
This introduces an abstract:// style transport, which on Linux
results in using the abstract socket with the given name (not
including the leading NULL byte). A new NNG_AF_ABSTRACT is
provided. Auto bind abstract sockets are also supported.
While here we have inlined the aios for the POSIX ipc pipe
objects, eliminating at least one set of failure paths, and
have also performed various other cleanups.
A unix:// alias is available on POSIX systems, which acts just
like ipc:// (and is fact just an alias). This is supplied so
that in the future we can add support for AF_UNIX on Windows.
We've also absorbed the ipcperms test into the new ipc_test suite.
Finally we are now enforcing that IPC path names on Windows are
not over the maximum size, rather than just silently truncating
them.
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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 also makes some smaller related changes to use the new
nni_type instead of nni_opt_type.
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This introduces a basic IPC API, modeled on the TCP API, for direct access.
Only connection options are exposed at present -- we need to add options
for dialers and listeners (and particularly listener settings for
permissions and security attributes.) Documentation is still outstanding,
but a very limited test suite exists.
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This changes the signature of the aio cancellation routines
to take the argument for cancellation directly, so we do not
need to lookup the argument using the nni_aio_get_prov_data.
We should probably consider eliminating nni_aio_get_prov_data,
and co, and changing the prov_extra to reflect prov_data. Later.
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fixed compilation error on OpenBSD, missing sockpeercred
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This changeset needs work. We are seeing errors described by
This reverts commit d7f7c896c0ede24249ef63b1e45b1878bf4bd473.
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fixes #208 pipe start should occur before connect / accept
fixes #616 Race condition closing between header & body
This refactors the transports to handle their own connection
handshaking before passing the pipe to the socket. This
changes and simplifies the setup. This also fixes a rather
challenging race condition described by #616.
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fixes #596 POSIX IPC should move away from pipedesc/epdesc
fixes #598 TLS and TCP listeners could support NNG_OPT_LOCADDR
fixes #594 Windows IPC should use "new style" win_io code.
fixes #597 macOS could support PEER PID
This large change set cleans up the IPC support on Windows and
POSIX. This has the beneficial impact of significantly reducing
the complexity of the code, reducing locking, increasing
concurrency (multiple dial and accepts can be outstanding now),
reducing context switches (we complete thins synchronously now).
While here we have added some missing option support, and fixed a
few more bugs that we found in the TCP code changes from last week.
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