Orkuncakilkaya
ebb1a00352
Udp.open/port/send/recv/from_ip/from_port/close/resolve/local_ip/ip/ip_text, native BSD sockets (udp.ll) and Winsock (udp_win.ll, -lws2_32), linked only when a program uses Udp.*; example, docs and tests. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
24 lines
720 B
Markdown
24 lines
720 B
Markdown
---
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id: udp-recv
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name: Udp.recv
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category: udp
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kind: namespace-method
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tokens: Udp.recv
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sig: Udp.recv(socket, bytes, cap) -> int
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tip: Read the next waiting datagram.
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order: 3
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ns: Udp
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member: recv
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---
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Copies the next waiting datagram, up to <code>cap</code> bytes, into <code>bytes</code> and returns its length, or <code>0</code> when nothing is waiting. It never blocks: call it in a loop each frame until it returns <code>0</code>. The sender is <a href="udp-from_ip.html"><code>Udp.from_ip</code></a> / <a href="udp-from_port.html"><code>from_port</code></a>.
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```ludic
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program Demo {
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entry {
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let s = Udp.open(port: 0)
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let buf = Memory.bytes(64)
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print(Udp.recv(socket: s, bytes: buf, cap: 64))
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}
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}
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```
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