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Shiju
45e3308d39
* fix(network): refuse protocol upgrades on JSON-RPC and MCP endpoints JSON-RPC and MCP rules apply to each HTTP request, but the proxy could forward a request that also carried upgrade headers. After an upstream answered 101, route selection and the forward proxy relayed the connection without inspection. Refuse any request that carries an Upgrade header on JSON-RPC-family endpoints before the L7 policy decision, in every enforcement mode. Share the check with the existing h2c refusal and call it from relay_jsonrpc as well. Record the refusal as a policy denial and answer with the unsupported_l7_protocol error, because no policy rule can allow the request. If a JSON-RPC-family endpoint still receives 101, close the connection instead of relaying raw bytes. Document the refusal and the WebSocket alternative. Signed-off-by: Shiju <shiju@nvidia.com> * docs(observability): remove duplicate protocol error definition Keep unsupported_l7_protocol in the response error-code list and retain its explanation in the policy troubleshooting table. Signed-off-by: Shiju <shiju@nvidia.com> --------- Signed-off-by: Shiju <shiju@nvidia.com>