Expose secret-stream datagram C API#3
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jjacke13 merged 2 commits intojjacke13:mainfrom Apr 26, 2026
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The existing C API only surfaced the reliable byte stream from
SecretStreamDuplex. Wire up the unreliable/datagram side too so
embedders that want UDP-like semantics (e.g. carrying raw IP
packets across hyperdht-routed peers) don't have to drop down
into C++.
Adds three new C entry points on hyperdht_stream_t:
* hyperdht_stream_set_on_udp_message — install a callback that
fires for each inbound UDP datagram (SecretStreamDuplex::
on_udp_message). If unset, datagrams are silently dropped.
* hyperdht_stream_send_udp — best-effort send via
SecretStreamDuplex::send_udp.
* hyperdht_stream_try_send_udp — non-blocking variant
that returns immediately if the path is congested.
ffi_internal.hpp gains storage for the callback + userdata, and
ffi_stream.cpp installs an on_udp_message dispatcher inside
hyperdht_stream_open so the C callback slot is always wired
once a stream is open.
No behavioural change for existing callers: the new callback
slot is opt-in and the send entry points are additive.
Made-with: Cursor
Use the same NS_SEND constant as @hyperswarm/secret-stream so unordered datagrams authenticate across the C++ and JS implementations. Made-with: Cursor
Owner
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thanks for the fixes :) |
jjacke13
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Apr 26, 2026
- REMAINING-WORK.md: remove completed items (ESP32, aarch64 CI, Kotlin wrapper, Python smoke test, stream drain), update FFI count 76→84, note Luke Burns' PRs #1-#3 - rpc.cpp: add DHT_LOG in check_persistent() showing NAT classification (UNKNOWN/OPEN/CONSISTENT/RANDOM) — aids debugging persistent transition - test/js/test_node_queries.js: verifies a server's announcement on DHT - test/js/test_node_serves.js: verifies a node serves PING, FIND_NODE, FIND_PEER, LOOKUP when queried directly
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Summary
SecretStreamDuplex::send_udp/on_udp_messagefor encrypted unreliable packet delivery.NS_SENDnamespace constant to match@hyperswarm/secret-stream, so C++ and JS peers can authenticate unordered messages.Test plan
hyperdhtpeer and back.SecretStreamDuplexUDP round-trip is present.Made with Cursor