| Commit message (Collapse) | Author | Age |
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This eliminates all the old #define's or enum values, making all
option IDs now totally dynamic, and providing well-known string
values for well-behaved applications.
We have added tests of some of these options, including lookups, and
so forth. We have also fixed a few problems; including at least
one crasher bug when the timeouts on reconnect were zero.
Protocol specific options are now handled in the protocol. We will
be moving the initialization for a few of those well known entities
to the protocol startup code, following the PAIRv1 pattern, later.
Applications must therefore not depend on the value of the integer IDs,
at least until the application has opened a socket of the appropriate
type.
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This permits option numbers to be allocated based on string name.
Eventually all the option values will be replaced with option
names. This will facilitate transports (ZeroTier) that may need
further options.
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This supports creating listeners and dialers, managing options
on them (though only a few options are supported at present),
starting them and closing them, all independently.
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Also enables creating endpoints that are idle (first part of
endpoint options API) and shutting down endpoints.
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fixes #66 Make pipe and endpoint structures private
This changes a number of things, refactoring endpoints and supporting
code to keep their internals private, and making endpoint close
synchronous. This will allow us to add a consumer facing API for
nng_ep_close(), as well as property APIs, etc.
While here a bunch of convoluted and dead code was cleaned up.
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This adds functions that know about option sizes and make them
easier to use. While here I added some validation of those, and
cleaned up a few tests slightly. Note that we do not need to
use the nng_impl.h for most tests. More of them need to be
cleaned up.
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This makes the operations that work on headers start with
nni_msg_header or nng_msg_header. It also renames _trunc to
_chop (same strlen as _trim), and renames prepend to insert.
We add a shorthand for clearing message content, and make
better use of the endian safe 32-bit accessors too.
This also fixes a bug in inserting large headers into messages.
A test suite for message handling is included.
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The PAIR_V1 protocol supports both raw and cooked modes, and has loop
prevention included. It also has a polyamorous mode, wherein it allows
multiple connections to be established. In polyamorous mode (set by
an option), the sender requests a paritcular pipe by setting it on the
message.
We default to PAIR_V1 now.
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fixes #38 Make protocols "pluggable", or at least optional
This is a breaking change, as we've done away with the central
registered list of protocols, and instead demand the user call
nng_xxx_open() where xxx is a protocol name. (We did keep a
table around in the compat framework though.)
There is a nice way for protocols to plug in via
an nni_proto_open(), where they can use a generic constructor
that they use to build a protocol specific constructor (passing
their ops vector in.)
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Hop counts for REQ were busted (bad TTL), and imported the
compat_reqtll test. At the same time, added code to nn_term
to shut down completely, discarding sockets. (Note that some
things, such as globals, may still be left around; that's ok.)
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It turns out that I had to fix a number of subtle asynchronous
handling bugs, but now TCP is fully asynchronous. We need to
change the high-level dial and listen interfaces to be async
as well.
Some of the transport APIs have changed here, and I've elected
to change what we expose to consumers as endpoints into seperate
dialers and listeners. Under the hood they are the same, but
it turns out that its helpful to know the intended use of the
endpoint at initialization time.
Scalability still occasionally hangs on Linux. Investigation
pending.
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Also, while here fixed a bug for the PAIR protocol in compat mode.
It should now be possible to import more of the nanomsg tests directly
with little or no modification.
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This does a few things. First it closes some preexisting leaks.
Second it tightens the overall close logic so that we automatically
discard idhash resources (while keeping numeric values for next id
etc. around) when the last socket is closed. This then eliminates
the need for applications to ever explicitly terminate resources.
It turns out platform-specific resources established at nni_init()
time might still be leaked, but it's also the case that we now no
longer dynamically allocate anything at platform initialization time.
(This presumes that the platform doesn't do so under the hood when
creating critical sections or mutexes for example.)
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This was the main blocker, I think, for the nanomsg legacy compat
shim. Now that we have this, it should be relatively straight-forward
to implement the legacy nanomsg API, including the SENDFD, RECVFD thing.
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There are lots of changes here, mostly stuff we did in support of
Windows TCP. However, there are some bugs that were fixed, and we
added some new error codes, and generalized the handling of some failures
during accept. Windows IPC (NamedPipes) is still missing.
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Windows is getting there. Needs a couple of more more hours to enable
everything, especially IPC, and most of the work at this point is probably
some combination of debug and tweaking things like error handling.
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As part of this, we've added a way to unblock callers in a message
queue with an error, even without a signal channel. This was necessary
to interrupt blockers upon survey timeout. They will get NNG_ETIMEDOUT,
but afterwards callers get NNG_ESTATE.
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The use of a single function to get both size and length actually
turned out to be awkward to use; better to have separate functions
to get each. While here, disable some of the initialization/fork
checks, because it turns out they aren't needed.
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Also we added a two phase shutdown for threads.
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This uncovered a few problems - inproc was not moving the headers
to the body on transmit, and the message chunk allocator had a serious
bug leading to memory corruption. I've also added a message dumper,
which turns out to be incredibly useful during debugging.
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We use some hints from Python's dict implementation, using an
open addressing scheme, and just ripping off the lower bits as
needed. Since we assign IDs consecutively, this should work
well. We shrink the table when it is only 1/8 full, and
we ensure that we grow the table when it is 2/3 full. (The
growth will start by at minimum doubling the required size.)
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This error code is set when a cooked mode protocol cannot support
an operation yet. For example, it makes no sense to recv() a
reply on a REQ socket if no request has been sent yet.
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In order to give control over synchronous vs. async dialing, we provide a
flag to indicate synchronous dialing is desired. (Hmm. Should we reverse the
default sense?) We extend listen to have the same flag.
Logic is moved to endpt.c since dialing is really and endpoint specific operation.
There are other minor related bug fixes here too.
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Instead of supplying a pipe, and expecting that the info there would be included
we use nng_msg_getopt(). This will be enabled by the app asking for extended
information by setting an option, we don't copy the data for every app (most won't
care). This means we don't have to worry about reference counting the pipe for
the life of associated messages.
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The external API now uses simpler names for various things, notably
we ditch the whole nng_socket_xx prefix. For example, intstead of
nng_socket_create, we just use nng_open(). There are no more nng_socket_xxx
calls.
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