Support LOOP link type

[thirdparty/pdns.git] / pdns / dnspcap.cc

diff --git a/pdns/dnspcap.cc b/pdns/dnspcap.cc
index 3924a698d17a05007215ac8d4137dd765dedf65a..aa17af85f1bbdd90430b62e00d7320e3e859292f 100644 (file)
--- a/pdns/dnspcap.cc
+++ b/pdns/dnspcap.cc
@@ -45,6 +45,9 @@ PcapPacketReader::PcapPacketReader(const string& fname) : d_fname(fname)
   if( d_pfh.linktype==1) {
     d_skipMediaHeader=sizeof(struct ether_header);
   }
+  else if( d_pfh.linktype==12) { // LOOP
+    d_skipMediaHeader=4;
+  }
   else if(d_pfh.linktype==101) {
     d_skipMediaHeader=0;
   }
@@ -114,6 +117,16 @@ try
       d_ether=reinterpret_cast<struct ether_header*>(d_buffer);
       contentCode=ntohs(d_ether->ether_type);
     }
+    else if(d_pfh.linktype == 12) { // LOOP
+      if (d_pheader.caplen < (d_skipMediaHeader + sizeof(*d_ip))) {
+        d_runts++;
+        continue;
+      }
+      if(d_ip->ip_v == 4)
+       contentCode = 0x0800;
+      else
+       contentCode = 0x86dd;
+    }
     else if(d_pfh.linktype==101) {
       if (d_pheader.caplen < (d_skipMediaHeader + sizeof(*d_ip))) {
         d_runts++;