| 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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If the underlying platform fails (FreeBSD is the only one I'm aware
of that does this!), we use a global lock or condition variable instead.
This means that our lock initializers never ever fail.
Probably we could eliminate most of this for Linux and Darwin, since
on those platforms, mutex and condvar initialization reasonably never
fails. Initial benchmarks show little difference either way -- so we
can revisit (optimize) later.
This removes a lot of otherwise untested code in error cases and so forth,
improving coverage and resilience in the face of allocation failures.
Platforms other than POSIX should follow a similar pattern if they need
this. (VxWorks, I'm thinking of you.) Most sane platforms won't have
an issue here, since normally these initializations do not need to allocate
memory. (Reportedly, even FreeBSD has plans to "fix" this in libthr2.)
While here, some bugs were fixed in initialization & teardown.
The fallback code is properly tested with dedicated test cases.
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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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