dnspcap: Decode IPv6 packets in DLT_RAW captures correctly

DLT_RAW captures (linktype 101) were not handling IPv6 packets
correctly.

For DLT_RAW, PcapPacketReader::getUDPPacket() synthesizes a fake
ethertype value (the "contentCode" variable), but for IPv6 it was
incorrectly set to 0x0806 (ARP) instead of 0x86dd (IPv6). This caused
IPv6 packets to silently be discarded.

diff --git a/pdns/dnspcap.cc b/pdns/dnspcap.cc
index 0280d702f7359379ab74d0ed8ea0301909bcfbb7..3366e70a9ae8396e8e39b2cff9d579866d8ea1c4 100644 (file)
--- a/pdns/dnspcap.cc
+++ b/pdns/dnspcap.cc
@@ -88,7 +88,7 @@ try
       if(d_ip->ip_v==4)
        contentCode = 0x0800;
       else
-       contentCode = 0x0806; 
+       contentCode = 0x86dd;
     }
     else if(d_pfh.linktype==113)
       contentCode=ntohs(d_lcc->lcc_protocol);