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https://github.com/matrix-construct/construct
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57 lines
1.9 KiB
Markdown
57 lines
1.9 KiB
Markdown
## Network Interface
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#### open()
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The open() call combines DNS resolution, TCP connecting and SSL handshaking.
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A dedicated options structure is provided to tweak the specifics of the process.
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#### close()
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Like the open() sequence, the close() sequence composes a complex of
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multiple operations to close_notify the SSL session with cryptographic
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soundness and then disconnect the TCP session. A dedicated options
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structure is provided to tweak details.
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### Conveyance
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*Four* strategies are available to work with the socket. We have it all
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covered. The `read()` and `write()` suites contain functions postfixed
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by their behavior:
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#### _all()
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A call to `read_all()` or `write_all()` will yield the calling `ircd::ctx`
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until the supplied buffers are filled or transmitted, respectively.
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It is strongly advised to set a timeout in the options structure when making
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calls of this type.
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An `ircd::ctx` is required to make this call, it does not work on the main
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stack.
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#### _few()
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A call to `*_few()` also yields the `ircd::ctx`, but the yield only lasts until
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some data is sent or received. Once some activity takes place, as much as
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possible is accomplished; there will not be any more yielding.
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It is strongly advised to set a timeout in the options structure when making
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calls of this type.
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An `ircd::ctx` is required to make this call, it does not work on the main
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stack.
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#### _any()
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A call to `*_any()` has true non-blocking behavior. It does not require an
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`ircd::ctx`. This call tries to conduct as much IO as possible without
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blocking. Internally it may be a loop of the `_one()` strategy that works
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through as much of the buffers until error.
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#### _one()
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A call to `*_one()` also has true non-blocking behavior and does not require
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an `ircd::ctx`. This call makes one syscall which may not fill or transmit
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all of the user buffers even if the kernel has more capacity to do so. To
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maximize the amount of data read or written to kernelland use the `_any()`
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strategy.
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