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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Repository

rS FreeBSD src repository - subversion

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Event Timeline

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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Path

Size

head/

sys/

dev/

hyperv/

netvsc/

if_hn.c

59 lines

Diff 33480

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

hyperv/hn: Fix UDP checksum offload issue in AzureClosedPublicActions