[coLinux-devel] [ colinux-Bugs-1955601 ] IPv6 not supported in colinux-*-net-daemon.exe

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Bugs item #1955601, was opened at 2008-05-01 20:55
Message generated for change (Comment added) made by henryn
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>Category: Daemons (Windows)
>Group: v0.8.x (devel)
>Status: Closed
>Resolution: Duplicate
Priority: 5
Private: No
Submitted By: Arion Lawrence (arionl)
Assigned to: Nobody/Anonymous (nobody)
Summary: IPv6 not supported in colinux-*-net-daemon.exe

Initial Comment:
IPv6 doesn't work inside coLinux even with the "ipv6" kernel module loaded. It seems that the "colinux-*-net-daemon.exe" programs don't pass IPv6 packets from the host to coLinux. CoLinux can try to send IPv6 packets (i.e., router solicitation) and I have verified that the packets get transmitted via sniffer, but it does not receive any responses. Looks like the host-side filtering doesn't pass IPv6 ethernet frames.

Excerpt from /devel-colinux-20080420/src/colinux/os/winnt/kernel/conet.c

        if ( co_conet_ntohs(pEthHdr->h_proto) == ETH_P_IP ) {
                if ( RtlCompareMemory(pEthHdr->h_dest, "\xFF\xFF\xFF\xFF\xFF\xFF", 6) == 6 ) {
                [ ...debug stuff...]
                        return TRUE;
                } else if ( RtlCompareMemory(pEthHdr->h_dest, adapter->macaddr, 6) == 6 ) {
                [ ...debug stuff...]
                        return TRUE;
                } else {
                [ ...debug stuff... ]
                        return FALSE;
                }
        }
        else if ( co_conet_ntohs(pEthHdr->h_proto) == ETH_P_ARP ) {
                 [ ...debug stuff... ]
                return TRUE;
        }
        else {
                co_debug("not IP or ARP protocol");
                return FALSE;
        }


The ethernet frame filter these daemons use only pass ARP and IP packets. They need to include ETH_P_IPV6 (frame type 0x86DD) so the packets can pass.



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>Comment By: Henry N. (henryn)
Date: 2009-02-11 00:44

Message:
This should be fixed from removing the IP frame checks. See Bug #2357494.
All packets are filtered on MAC layer only now.


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