tree 46eec2ff55ac38a3591cfba23feebaf0f814e2c9
parent 785e5f1f962ec95cf59333c931280890f130b9c2
author Aaron Huang <huangaaron@google.com> 1542285046 +0800
committer Aaron Huang <huangaaron@google.com> 1544451494 +0000

apf: Drop ARP reply if SPA is 0.0.0.0

Some network re-writing packet from broadcast MACs to unicast,
result in this kind of packets cannot be dropped by APF filter.
Thus, drop ARP reply if source IP is 0.0.0.0.

Note: Linux kernel always ignores such replies in the function arp_process().

Bug: 118044271
Test: runtest frameworks-net -c android.net.apf.ApfTest
Change-Id: Id293bf231913d9b483ce7d8dd909e05fa927ccd7