feat: Suricata EVE JSON output for the IDS#394
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Add an opt-in Suricata-compatible EVE JSON sink (logging.eve_log: enabled/file/event_types). Producers publish non-blocking onto a broadcast; a single async subscriber owns the writer and flushes on an interval (lossy/lagged-counted), so a slow sink never stalls the IDS hot path. Disabled by default; stdout/stderr/file sinks. Emits the common EVE envelope (timestamp, flow_id, src/dest, proto, app_proto) plus typed alert/http/stats objects; placeholder loopback/unspecified endpoints are omitted. Wired up at app boot alongside the other inspect-channel sinks.
Map thalamus alerts to EVE alert records (with JA4+ fingerprints and, on the L7 path, the triggering HTTP transaction embedded) across the XDP, AF_PACKET and L7-ingest paths. Emit a standalone EVE http record per decrypted transaction, and a periodic EVE stats record from the stats loop. All gated on the sink being enabled so the disabled path is free.
Carry the downstream server address into the post-TLS HttpTxn so the IDS sees a real destination instead of a loopback stand-in: dest_ip uses the node host IP (SYNAPSE_NODE_IP downward-API env) with the local socket as fallback, dest_port is the real listener port. Synthesize a Host header from the HTTP/2 :authority pseudo-header when absent so http.host rules, JA4H, and the hostname field are populated on h2 traffic.
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Adds opt-in Suricata-compatible EVE JSON output for the IDS.
What
synapse-core— a non-blocking EVE JSON sink (logging.eve_log:enabled/file/event_types). Producers publish onto a broadcast; one async subscriber owns the writer and flushes on an interval, so a slow sink drops (lagged-counted) rather than stalling the inspect path.stdout/stderr/file sinks; disabled by default.synapse-idp— map alerts to EVEalertrecords (with the JA4+ suite, and the triggering HTTP transaction embedded on the L7 path) across the XDP, AF_PACKET and L7-ingest paths; emit standalonehttprecords per decrypted transaction and a periodicstatsrecord.synapse-proxy— carry the downstream server address into the post-TLSHttpTxnso the IDS sees a real destination (node host IP viaSYNAPSE_NODE_IP, local-socket fallback) instead of a loopback stand-in; synthesize aHostheader from the HTTP/2:authoritysohttp.hostrules / JA4H / thehostnamefield populate on h2.Records use Suricata field spellings (
dest_ip/dest_port), ISO8601-µs timestamps,action: allowed|blocked, and carry the JA4+ suite. Placeholder loopback/unspecified endpoints are omitted.Tests
fmt+clippy --deny warnings+cargo check --workspacegreen; unit tests for the serializer shape, placeholder omission, and config parsing.