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Pre-release documentation audit against master. Adds the two fully
undocumented modules and closes gaps found by diffing every docs/*.html
page against its corresponding source:
- New docs/unix.html and docs/serial.html (socket.unix stream/dgram and
socket.serial were never documented), linked from index.html,
introduction.html, socket.html and reference.html. serial.html notes
the current lack of a baud/parity/flow-control API and includes an
os.execute+stty workaround example. Both note Windows is unsupported.
- socket.html: document headers.setcanonic, point to unix/serial modules.
- tcp.html: document getfamily, setpeername/setsockname aliases.
- udp.html: document getfamily, getfd/setfd, dirty; document the
ipv6-multicast-hops/ipv6-unicast-hops aliasing as current (known-buggy)
behavior rather than the originally intended semantics.
- http.html: correct redirect text (301/302/303/307/308, was 301/302
only); document MAXHEADERLINE/MAXHEADERSIZE.
- dns.html: document getnameinfo.
- ltn12.html: document source.rewind and BLOCKSIZE.
- installation.html: fix stale "LuaSocket 3.0" sample output to 3.1.0.
- reference.html: index every anchor added above plus new Unix/Serial
blocks.
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feat(receive): add maxsize argument to bound memory usage
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client:receive("*l") and receive("*a") are unbounded: a peer that never
sends a newline, or never closes, makes LuaSocket buffer until the
process runs out of memory (e.g. src/http.lua reading response headers
in a loop). Add an optional maxsize argument that caps the payload a
single call may accumulate, including prefix.
- Hoist all argument validation ahead of timeout_markstart() so bad
calls (maxsize < 1, #prefix >= maxsize, numeric pattern > maxsize)
raise before any I/O and leave the socket untouched.
- recvline/recvall take a budget and return a new internal
BUF_OVERSIZED code, surfaced to Lua as the "oversized" error
alongside "timeout"/"closed", with the partial held in the 3rd
return value.
- recvraw is left untouched: argument checks make the cap unreachable
for numeric patterns.
- Preserve three invariants: a timeout partial is always shorter than
maxsize (safe to retry as prefix), completion beats the cap for *a,
and no bytes are lost or skipped on overflow.
- tcp.c, unixstream.c and serial.c all share this code path unchanged.
Adds test coverage (argument errors, *l/*a boundaries, timeout/close
at the cap, the drain idiom, numeric patterns, unix-stream mirror) and
documents the new argument, error, and recovery idioms in docs/tcp.html.
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Adds docs for the option, but also adds the docs for other
options present in the code but missing from the docs.
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This makes it so that a listening socket does not become readable for
accept() until a connection has been fully established *and* started
sending something, thus the program doesn't have to wait for the first
data. This only makes sense for client-speaks-first protocols.
Co-authored-by: Caleb Maclennan <caleb@alerque.com>
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