Details
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Type: New Feature
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Status: Closed
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Priority: Minor
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Resolution: Fixed
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Affects Version/s: None
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Fix Version/s: V5.3.0.5, V5.4.0.1, V5.4.1.0 (open)
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Labels:None
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Account:SPC TCP_IP (SPCTCPIP)
Description
The current implementation will generate a TCP/RST and/or ICMP Unreachable for each received TCP/UDP frame addressed to a closed port. This contributes substantial cpu load in network load/attack scenarios and will also further increase the network load due to backscatter effects.
To improve the behavior under such condition, a budget mechanism is provided which will limit the amout of these error responses to a resonable frequency. The mechanism has to be explicitly enabled in the firmware by calling "LwIP_EnableErrorBudget()"