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LIN6-10462 : CLONE - wrlinux 4 - SCTP PMTU Discovery does not work if MTU is not multiple of 4

Created: Oct 28, 2015    Updated: Dec 3, 2018
Resolved Date: Oct 29, 2015
Found In Version: 6.0
Fix Version:
Severity: Standard
Applicable for: Wind River Linux 6
Component/s: Kernel


In SCTP PMTU calculation, problem is that data portion limit calculation leads to re-fragmentation in IP, which is sub-optimal. The problem is max_data initial value, which doesn't take into account the fact, that data chunk must be padded to 4-bytes boundary.

Steps to Reproduce

Any SCT PMTUD basic test case should be enough to reproduce this given the MTU of the patch is not multiple of 4.

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