Ticket #2840: dyff.diff

device.c

@@ -125 +125 @@
         IF_DEQUEUE(&ifp->receive_queue, mb);
     } while (mb == NULL);
 
-    length = min_c(max_c((size_t)mb->m_len, 0), *numBytes);
+    length = min_c(max_c((size_t)mb->m_pkthdr.len, 0), *numBytes);
 
 #if 0
     mb = m_defrag(mb, 0);
@@ -135 +135 @@
     }
 #endif
 
-    memcpy(buffer, mtod(mb, const void *), length);
+    m_copydata(mb, 0, length, buffer);
     *numBytes = length;
 
     m_freem(mb);