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1b21eba81e
When receiving a PFCP Session Establishment Request with an invalid PDN type(0), the UPF would crash due to a failed assertion. This commit improves error handling by: - Removing the session_type assertion check that caused the crash - Changing warning log to error log for better visibility - Returning CAUSE_SERVICE_NOT_SUPPORTED instead of proceeding with invalid type This prevents potential DoS attacks through malformed PFCP messages.
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