FreeBSD Bugzilla – Attachment 135850 Details for
Bug 180893
[if_ethersubr] [patch] Packets received with own LLADDR confuse things.
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[patch]
file.diff
file.diff (text/plain), 711 bytes, created by
dave
on 2013-07-27 18:50:00 UTC
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file.diff
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dave
Created:
2013-07-27 18:50:00 UTC
Size:
711 bytes
patch
obsolete
>Index: if_ethersubr.c >=================================================================== >--- if_ethersubr.c (revision 253638) >+++ if_ethersubr.c (working copy) >@@ -636,6 +636,17 @@ > ETHER_BPF_MTAP(ifp, m); > > /* >+ * Drop the frame if it appears to be sent by us. That is: >+ * it appears to have the same LLADDR. >+ */ >+ if(bcmp(eh->ether_shost, IF_LLADDR(ifp), ETHER_ADDR_LEN) == 0) { >+ if_printf(ifp, "Dropped packet that claims to be from me!\n"); >+ ifp->if_ierrors++; >+ m_freem(m); >+ return; >+ } >+ >+ /* > * If the CRC is still on the packet, trim it off. We do this once > * and once only in case we are re-entered. Nothing else on the > * Ethernet receive path expects to see the FCS.
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bug 180893
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