1 files changed, 51 insertions, 0 deletions
diff --git a/regress/sys/netinet6/frag6/frag6_overhead.py b/regress/sys/netinet6/frag6/frag6_overhead.py
new file mode 100644
index 00000000000..388258358bc
--- /dev/null
+++ b/regress/sys/netinet6/frag6/frag6_overhead.py
@@ -0,0 +1,51 @@
+#!/usr/local/bin/python2.7
+# send ping6 fragment that overlaps the second fragment  with the head
+
+# |----|
+#      |----|
+#      |XXXXXXXXX|
+#           |----|
+
+import os
+from addr import *
+from scapy.all import *
+
+dstaddr=sys.argv[1]
+pid=os.getpid()
+payload="ABCDEFGHIJKLOMNO"
+dummy="0123456701234567"
+packet=IPv6(src=SRC_OUT6, dst=dstaddr)/ICMPv6EchoRequest(id=pid, data=payload)
+frag=[]
+frag.append(IPv6ExtHdrFragment(nh=58, id=pid, m=1)/str(packet)[40:48])
+frag.append(IPv6ExtHdrFragment(nh=58, id=pid, offset=1, m=1)/str(packet)[48:56])
+frag.append(IPv6ExtHdrFragment(nh=58, id=pid, offset=1)/dummy)
+frag.append(IPv6ExtHdrFragment(nh=58, id=pid, offset=2)/str(packet)[56:64])
+eth=[]
+for f in frag:
+	pkt=IPv6(src=SRC_OUT6, dst=dstaddr)/f
+	eth.append(Ether(src=SRC_MAC, dst=DST_MAC)/pkt)
+
+if os.fork() == 0:
+	time.sleep(1)
+	sendp(eth, iface=SRC_IF)
+	os._exit(0)
+
+ans=sniff(iface=SRC_IF, timeout=3, filter=
+    "ip6 and src "+dstaddr+" and dst "+SRC_OUT6+" and icmp6")
+for a in ans:
+	if a and a.type == scapy.layers.dot11.ETHER_TYPES.IPv6 and \
+	    ipv6nh[a.payload.nh] == 'ICMPv6' and \
+	    icmp6types[a.payload.payload.type] == 'Echo Reply':
+		id=a.payload.payload.id
+		print "id=%#x" % (id)
+		if id != pid:
+			print "WRONG ECHO REPLY ID"
+			exit(2)
+		data=a.payload.payload.data
+		print "payload=%s" % (data)
+		if data == payload:
+			exit(0)
+		print "PAYLOAD!=%s" % (payload)
+		exit(1)
+print "NO ECHO REPLY"
+exit(2)