git: 07ffa50ba075 - main - pf tests: test short packets
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Date: Tue, 28 Jun 2022 08:43:43 UTC
The branch main has been updated by kp:
URL: https://cgit.FreeBSD.org/src/commit/?id=07ffa50ba075d450287e22385f110e3c319470e9
commit 07ffa50ba075d450287e22385f110e3c319470e9
Author: Kristof Provost <kp@FreeBSD.org>
AuthorDate: 2022-06-23 15:52:52 +0000
Commit: Kristof Provost <kp@FreeBSD.org>
CommitDate: 2022-06-28 08:31:23 +0000
pf tests: test short packets
Test sending very short packets (i.e. too short for an IP header)
packets in the Ethernet filtering code.
Sponsored by: Rubicon Communications, LLC ("Netgate")
---
tests/sys/netpfil/pf/Makefile | 2 ++
tests/sys/netpfil/pf/ether.sh | 46 +++++++++++++++++++++++++++
tests/sys/netpfil/pf/pft_ether.py | 67 +++++++++++++++++++++++++++++++++++++++
3 files changed, 115 insertions(+)
diff --git a/tests/sys/netpfil/pf/Makefile b/tests/sys/netpfil/pf/Makefile
index 45eaec2f8ddc..83f0d94e952e 100644
--- a/tests/sys/netpfil/pf/Makefile
+++ b/tests/sys/netpfil/pf/Makefile
@@ -45,6 +45,7 @@ ${PACKAGE}FILES+= CVE-2019-5597.py \
frag-overlimit.py \
frag-overreplace.py \
pfsync_defer.py \
+ pft_ether.py \
utils.subr
${PACKAGE}FILESMODE_CVE-2019-5597.py= 0555
@@ -54,5 +55,6 @@ ${PACKAGE}FILESMODE_frag-overindex.py= 0555
${PACKAGE}FILESMODE_frag-overlimit.py= 0555
${PACKAGE}FILESMODE_frag-overreplace.py= 0555
${PACKAGE}FILESMODE_pfsync_defer.py= 0555
+${PACKAGE}FILESMODE_pft_ether.py= 0555
.include <bsd.test.mk>
diff --git a/tests/sys/netpfil/pf/ether.sh b/tests/sys/netpfil/pf/ether.sh
index 283267b98c54..549fbf22ab7b 100644
--- a/tests/sys/netpfil/pf/ether.sh
+++ b/tests/sys/netpfil/pf/ether.sh
@@ -634,6 +634,51 @@ match_tag_cleanup()
pft_cleanup
}
+atf_test_case "short_pkt" "cleanup"
+short_pkt_head()
+{
+ atf_set descr 'Test overly short Ethernet packets'
+ atf_set require.user root
+}
+
+short_pkt_body()
+{
+ pft_init
+
+ epair=$(vnet_mkepair)
+ ifconfig ${epair}a 192.0.2.1/24 up
+
+ vnet_mkjail alcatraz ${epair}b
+ jexec alcatraz ifconfig ${epair}b 192.0.2.2/24 up
+
+ jexec alcatraz pfctl -e
+ pft_set_rules alcatraz \
+ "ether pass in" \
+ "ether pass out" \
+ "ether pass in l3 from 192.0.2.1"
+
+ # Sanity check
+ atf_check -s exit:0 -o ignore ping -c 1 192.0.2.2
+
+ jexec alcatraz pfctl -se -v
+
+ # Try sending ever shorter ping requests
+ # BPF won't let us send anything shorter than an Ethernet header, but
+ # that's good enough for this test
+ for i in `seq 46 14`
+ do
+ $(atf_get_srcdir)/pft_ether.py \
+ --sendif ${epair}a \
+ --to 192.0.2.2 \
+ --len ${i}
+ done
+}
+
+short_pkt_cleanup()
+{
+ pft_cleanup
+}
+
atf_init_test_cases()
{
atf_add_test_case "mac"
@@ -646,4 +691,5 @@ atf_init_test_cases()
atf_add_test_case "ip"
atf_add_test_case "tag"
atf_add_test_case "match_tag"
+ atf_add_test_case "short_pkt"
}
diff --git a/tests/sys/netpfil/pf/pft_ether.py b/tests/sys/netpfil/pf/pft_ether.py
new file mode 100644
index 000000000000..1892e0a8f95e
--- /dev/null
+++ b/tests/sys/netpfil/pf/pft_ether.py
@@ -0,0 +1,67 @@
+#!/usr/bin/env python3
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright © 2022. Rubicon Communications, LLC (Netgate). All Rights Reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+
+import argparse
+import logging
+logging.getLogger("scapy").setLevel(logging.CRITICAL)
+import scapy.all as sp
+import socket
+import sys
+
+PAYLOAD_MAGIC = bytes.fromhex('42c0ffee')
+
+def ping(send_if, dst_ip, length):
+ ether = sp.Ether()
+ ip = sp.IP(dst=dst_ip)
+ icmp = sp.ICMP(type='echo-request')
+ raw = sp.raw(PAYLOAD_MAGIC)
+
+ req = ether / ip / icmp / raw
+ req = req.build()[0:length]
+
+ sp.sendp(req, iface=send_if, verbose=False)
+
+def main():
+ parser = argparse.ArgumentParser("pft_ether.py",
+ description="Ethernet test tool")
+ parser.add_argument('--sendif', nargs=1,
+ required=True,
+ help='The interface through which the packet(s) will be sent')
+ parser.add_argument('--to', nargs=1,
+ required=True,
+ help='The destination IP address for the ICMP echo request')
+ parser.add_argument('--len', nargs=1,
+ required=True,
+ help='The length of the packet')
+
+ args = parser.parse_args()
+
+ ping(args.sendif[0], args.to[0], int(args.len[0]))
+
+if __name__ == '__main__':
+ main()