| Commit message (Collapse) | Author | Age |
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More direct access methods are provided instead.
This results in much lower friction when using, and is a step on the path
to removing NNG_OPT_LOCADDR as well.
We need to figure a solution for NNG_OPT_LOCADDR for dialers; for
listeners there is little use in it either, and it will be removed.
(Dialers will probably get a new NNG_OPT_BIND_IP option.)
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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 work is inspired by the DTLS work, and harmonizes the UDP implementation
with DTLS somewhat.
This should make it more resilient to failures, although there is no longer any
attempt to guard against sequencing (reorders, dupes) errors. Applications that
need such protection should either add it themselves, or use a transport which
provides that guarantee (such as TCP). Note that with devices and and such in
the way, such guarantees have never been perfect with SP anyway.
The UDP transport header sizes for this are now just 8 bytes (beyond the UDP header
itself.
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This aligns more closely with the nng_ctx functions.
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This allows a URL object to be used for dialing, which may
be easier than using a string if you already have the URL object.
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This eliminates most (but not all) of the dynamic allocations
associated with URL objects. A number of convenience fields
on the URL are removed, but we are able to use common buffer
for most of the details.
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Adds test cases for this and for remote pipe as well.
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This seems to give much higher reliability in message receives,
so we've tightened it up a bit for now.
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The burst test should be more reliable (by avoiding extra work during the
hot code path). We also make the threshold for pass/failure tunable via
an environment variable (NNG_UDP_PASS_RATE) which is a percentage.
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This starts by updating UDP to use this approach, since we already
have a convenient lock. We should look at doing the same for other stats.
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We are finding that on darwin its very easy for us to lose UDP messages
as the socket buffer appears to be depressingly small.
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There were several bugs here, including use-after-free,
a problem when the copy limit was exceeded, and uninitialized
receive thresholds.
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This is the initial implementation of UDP transport.
It does in order guarantees (and consequently filters duplicates),
but it does not guarantee delivery. The protocol limits payloads
to 65000 bytes (minus headers for SP), but you really want to
keep it to much less -- probably best for short messages that within
a single MTU to avoid IP fragmentation and reassembly.
This is unicast only for now (although there are plans for some
support for multicast and broadcast as well as being able to
perform automatic mesh building, but that will be in following work.
Additional tunables are coming. This is only lightly tested at
this point, and should be considered experimental. Its also undocumented.
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