fix(server): enforce ipWhitelist for Socket.IO too#4169
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ipWhitelist was only applied to HTTP routes, so Socket.IO module namespaces could still be reached from disallowed clients. This adds the same whitelist check to Socket.IO handshakes (allowRequest), and reuses the same client IP resolution for both HTTP and Socket.IO (forwarded IP is only trusted for loopback peers). Also adds tests for handshake allow/deny and forwarded-header behavior. Fixes: GHSA-w26r-fwg8-rcp3
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ipWhitelist was only applied to HTTP routes, so Socket.IO module namespaces could still be reached from disallowed clients.
This adds the same whitelist check to Socket.IO handshakes (allowRequest), and reuses the same client IP resolution for both HTTP and Socket.IO (forwarded IP is only trusted for loopback peers).
Also adds tests for handshake allow/deny and forwarded-header behavior.
Fixes: GHSA-w26r-fwg8-rcp3