Differential D17376 Diff 49985 tests/sys/netinet6/frag6/frag6_queuelimit.py

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tests/sys/netinet6/frag6/frag6_queuelimit.py

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				#!/usr/local/bin/python2.7

				print "drop too long fragment queue, reassemble less fragments"

				# \|----\|
				# \|----\|
				# \|----\|
				# ... ...
				# \|----\|

				import os
				from addr import *
				from scapy.all import *

				pid=os.getpid()
				eid=pid & 0xffff
				payload="ABCDEFGHIJKLMNOP" * 70
				frag=[]
				fid=pid & 0xffffffff
				# send packets with 65 and 64 fragments
				for max in (64, 63):
				eid = ~eid & 0xffff
				packet=IPv6(src=LOCAL_ADDR6, dst=REMOTE_ADDR6)/ \
				ICMPv6EchoRequest(id=eid, data=payload)
				fid = ~fid & 0xffffffff
				for i in range(max):
				frag.append(IPv6ExtHdrFragment(nh=58, id=fid, m=1,
				offset=i)/str(packet)[40+i8:40+(i+1)8])
				frag.append(IPv6ExtHdrFragment(nh=58, id=fid,
				offset=max)/str(packet)[40+max*8:])
				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)
				for e in eth:
				sendp(e, iface=LOCAL_IF)
				time.sleep(0.001)
				os._exit(0)

				ans=sniff(iface=LOCAL_IF, timeout=6, filter=
				"ip6 and src "+REMOTE_ADDR6+" and dst "+LOCAL_ADDR6+" and icmp6")
				os.kill(child, 15)
				os.wait()

				reply=False
				for a in ans:
				if a and a.type == ETH_P_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 == ~eid & 0xffff:
				print "ECHO REPLY FROM 65 FRAGMENTS"
				exit(1)
				if id != eid:
				print "WRONG ECHO REPLY ID"
				exit(2)
				data=a.payload.payload.data
				print "payload=%s" % (data)
				if data != payload:
				print "PAYLOAD!=%s" % (payload)
				exit(2)
				reply=True
				if not reply:
				print "NO ECHO REPLY FROM 64 FRAGMENTS"
				exit(1)
				exit(0)