Fragment one large 64k IP ping packet into 155 fragments, each with

424 bytes payload.  Send them in random order.  Expect a fragment
with matching echo reply header.

1 files changed, 64 insertions, 0 deletions

diff --git a/regress/sys/netinet6/frag6/frag6_maxlen.py b/regress/sys/netinet6/frag6/frag6_maxlen.py
new file mode 100644
index 00000000000..70040b3ae29
--- /dev/null
+++ b/regress/sys/netinet6/frag6/frag6_maxlen.py
@@ -0,0 +1,64 @@
+#!/usr/local/bin/python2.7
+
+print "fully fragmented maximum size ping6 packet, sent in random order"
+
+#          |----|
+#                                        |----|
+#                              |----|
+#                                                       |----|
+#     |----|
+
+import os
+import random
+from addr import *
+from scapy.all import *
+
+pid=os.getpid()
+eid=pid & 0xffff
+iplen=2**16
+size=424
+payload="ABCDEFGHIJKLMNOP" * (iplen / 16)
+packet=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/ \
+    ICMPv6EchoRequest(id=eid, data=str(payload)[0:iplen-8-1])
+frag=[]
+fid=pid & 0xffffffff
+max=iplen/size
+for i in range(max):
+	frag.append(IPv6ExtHdrFragment(nh=58, id=fid, m=1,
+	    offset=i*(size/8))/str(packet)[40+i*size:40+(i+1)*size])
+frag.append(IPv6ExtHdrFragment(nh=58, id=fid,
+    offset=max*(size/8))/str(packet)[40+max*size:])
+eth=[]
+for f in frag:
+	pkt=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/f
+	eth.append(Ether(src=LOCAL_MAC, dst=REMOTE_MAC)/pkt)
+
+child = os.fork()
+if child == 0:
+	time.sleep(1)
+	randeth=eth
+	random.shuffle(randeth)
+	for e in randeth:
+		sendp(e, iface=LOCAL_IF)
+		time.sleep(0.001)
+	os._exit(0)
+
+ans=sniff(iface=LOCAL_IF, timeout=10, filter=
+    "ip6 and src "+REMOTE_ADDR6+" and dst "+LOCAL_ADDR6+" and proto ipv6-frag")
+os.kill(child, 15)
+os.wait()
+
+for a in ans:
+	if a and a.type == ETH_P_IPV6 and \
+	    ipv6nh[a.payload.nh] == 'Fragment Header' and \
+	    a.payload.payload.offset == 0 and \
+	    ipv6nh[a.payload.payload.nh] == 'ICMPv6' and \
+	    icmp6types[a.payload.payload.payload.type] == 'Echo Reply':
+		id=a.payload.payload.payload.id
+		print "id=%#x" % (id)
+		if id != eid:
+			print "WRONG ECHO REPLY ID"
+			exit(2)
+		exit(0)
+print "NO ECHO REPLY"
+exit(1)