1 files changed, 58 insertions, 0 deletions
diff --git a/tests/sys/netpfil/pf/frag-adjhole.py b/tests/sys/netpfil/pf/frag-adjhole.py
new file mode 100644
index 000000000000..99caf66617dd
--- /dev/null
+++ b/tests/sys/netpfil/pf/frag-adjhole.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python3
+#
+# Copyright (c) 2025 Alexander Bluhm <bluhm@openbsd.org>
+
+from fragcommon import *
+
+# |--------|
+#          |--------|
+#      |-------|
+#                   |----|
+
+def send(src, dst, send_if, recv_if):
+	pid = os.getpid()
+	eid = pid & 0xffff
+	payload = b"ABCDEFGHIJKLMNOP" * 2
+	packet = sp.IP(src=src, dst=dst)/ \
+	    sp.ICMP(type='echo-request', id=eid) / payload
+	frag = []
+	fid = pid & 0xffff
+	frag.append(sp.IP(src=src, dst=dst, proto=1, id=fid,
+	    flags='MF') / bytes(packet)[20:36])
+	frag.append(sp.IP(src=src, dst=dst, proto=1, id=fid,
+	    frag=2, flags='MF') / bytes(packet)[36:52])
+	frag.append(sp.IP(src=src, dst=dst, proto=1, id=fid,
+	    frag=1, flags='MF') / bytes(packet)[28:44])
+	frag.append(sp.IP(src=src, dst=dst, proto=1, id=fid,
+	    frag=4) / bytes(packet)[52:60])
+	eth=[]
+	for f in frag:
+		eth.append(sp.Ether()/f)
+	if os.fork() == 0:
+		time.sleep(1)
+		sp.sendp(eth, iface=send_if)
+		os._exit(0)
+
+	ans = sp.sniff(iface=recv_if, timeout=3, filter=
+	    "ip and src " + dst + " and dst " + src + " and icmp")
+	for a in ans:
+		if a and a.type == sp.ETH_P_IP and \
+		    a.payload.proto == 1 and \
+		    a.payload.frag == 0 and a.payload.flags == 0 and \
+		    sp.icmptypes[a.payload.payload.type] == 'echo-reply':
+			id = a.payload.payload.id
+			print("id=%#x" % (id))
+			if id != eid:
+				print("WRONG ECHO REPLY ID")
+				exit(2)
+			data = a.payload.payload.payload.load
+			print("payload=%s" % (data))
+			if data == payload:
+				exit(0)
+			print("PAYLOAD!=%s" % (payload))
+			exit(1)
+	print("NO ECHO REPLY")
+	exit(2)
+
+if __name__ == '__main__':
+	main(send)