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Modify the PCAP filter to allow multicast packets#4289

Merged
OBattler merged 1 commit into
86Box:version/4.2from
cold-brewed:pcap-filter
Mar 21, 2024
Merged

Modify the PCAP filter to allow multicast packets#4289
OBattler merged 1 commit into
86Box:version/4.2from
cold-brewed:pcap-filter

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@cold-brewed

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Summary

This PR modifies the PCAP filter accordingly:

  • Multicast packets are now passed through
  • The broadcast keyword is used instead of ff:ff:ff:ff:ff:ff

The biggest effect is fixing NetBEUI / NetBIOS which was not working before: NetBEUI uses a multicast address (03:00:00:00:00:01) instead of a standard ethernet broadcast which was not passing the PCAP filter.

Anything that uses NetBEUI / NetBIOS should now work with PCAP, including LAN Manager. Any other L3 that uses multicast should also now work.

Screenshot of win98 with no TCP/IP installed, using only NetBEUI to communicate with another win98 host configured the same:

netbeui

Checklist

  • I have discussed this with core contributors already

References

N/A

@NJRoadfan

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This should also fix AppleTalk if someone is using NT Services For Macintosh or PCMacLAN in a VM.

@OBattler
OBattler merged commit a02118c into 86Box:version/4.2 Mar 21, 2024
@cold-brewed
cold-brewed deleted the pcap-filter branch March 21, 2024 21:08
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3 participants