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Differential D12429

hyperv/hn: Fix UDP checksum offload issue in Azure
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Authored by sepherosa_gmail.com on Sep 21 2017, 7:25 AM.
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decui_microsoft.com
honzhan_microsoft.com
howard0su_gmail.com
royger
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rS324049: hyperv/hn: Fix UDP checksum offload issue in Azure.
Summary

UDP checksum offload does not work in Azure if following conditions are met:

  • sizeof(IP hdr + UDP hdr + payload) > 1420.
  • IP_DF is not set in IP hdr

Use software checksum for UDP datagrams falling into this category.

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rS FreeBSD src repository - subversion
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sepherosa_gmail.com created this revision.Sep 21 2017, 7:25 AM
Closed by commit rS324049: hyperv/hn: Fix UDP checksum offload issue in Azure. (authored by sephe). · Explain WhySep 27 2017, 5:45 AM
This revision was automatically updated to reflect the committed changes.

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PathSize
head/
sys/
dev/
hyperv/
netvsc/
59 lines

Diff 33480

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head/sys/dev/hyperv/netvsc/if_hn.c

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