Set up two loopback interfaces in different routing domains. Try

to ping existing and non existing addresses in these domains.  Also
test pinging to different rdomains via pf.  Create routing loops
and check that the packet vanishes.

2 files changed, 129 insertions, 0 deletions

diff --git a/regress/sys/net/loop/Makefile b/regress/sys/net/loop/Makefile
new file mode 100644
index 00000000000..69671ab7e98
--- /dev/null
+++ b/regress/sys/net/loop/Makefile
@@ -0,0 +1,126 @@
+#	$OpenBSD: Makefile,v 1.1 2017/11/17 10:26:58 bluhm Exp $
+
+# Copyright (c) 2017 Alexander Bluhm <bluhm@openbsd.org>
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+# Set up two loopback interfaces in different routing domains.
+# Try to ping existing and non existing addresses in these domains.
+# Also test pinging to different rdomains via pf.
+
+SYSCTL_FORWARDING !=       sysctl net.inet.ip.forwarding
+
+.if ${SYSCTL_FORWARDING:C/.*=//} != 1
+regress:
+	@echo "${SYSCTL_FORWARDING}"
+	@echo set this sysctl to 1 for additional tests
+	@echo SKIPPED
+.endif
+
+# This test uses routing doamin and interface number 11 and 12.
+# Adjust it here, if ue want to use something else.
+N1 =		11
+N2 =		12
+NUMS =		${N1} ${N2}
+
+.PHONY: check-interfaces check-rdomains ifconfig unconfig
+
+check-rdomains:
+	# check if rdomains are busy
+.for n in ${NUMS}
+	@if /sbin/ifconfig | grep -v '^lo${n}:' | grep ' rdomain ${n} '; then\
+	    echo routing domain ${n} is already used >&2; exit 1; fi
+.endfor
+
+ifconfig: check-rdomains
+	# create and configure loopback interfaces
+.for n in ${NUMS}
+	${SUDO} /sbin/ifconfig lo${n} rdomain ${n}
+	${SUDO} /sbin/ifconfig lo${n} inet 127.0.0.1/8
+	${SUDO} /sbin/ifconfig lo${n} inet 127.0.0.${n} alias
+	${SUDO} /sbin/route -n -T ${n} add -inet -host 127.6.6.6 127.0.0.1
+.endfor
+	${SUDO} /sbin/route -n -T ${N1} add -inet -host 127.0.0.${N2} 127.0.0.1
+	${SUDO} /sbin/route -n -T ${N2} add -inet -host 127.0.0.${N1} 127.0.0.1
+
+unconfig:
+	# destroy interfaces
+.for n in ${NUMS}
+	-${SUDO} /sbin/ifconfig lo${n} 127.0.0.1 delete
+	-${SUDO} /sbin/ifconfig lo${n} 127.0.0.${n} delete
+.endfor
+	rm -f stamp-setup
+
+stamp-setup: Makefile
+	@echo '\n======== $@ ========'
+	${.MAKE} -C ${.CURDIR} ifconfig
+	date >$@
+
+# Create python include file containing the addresses.
+addr.py: Makefile
+	rm -f $@ $@.tmp
+.for var in N1 N2
+	echo '${var}="${${var}}"' >>$@.tmp
+	echo 'ADDR_${var}="127.0.0.${${var}}"' >>$@.tmp
+.endfor
+	mv $@.tmp $@
+
+# Load the pf rules into the kernel.
+stamp-pfctl: addr.py pf.conf stamp-setup
+	@echo '\n======== $@ ========'
+	cat addr.py ${.CURDIR}/pf.conf | pfctl -n -f -
+	cat addr.py ${.CURDIR}/pf.conf | ${SUDO} pfctl -a regress -f -
+	@date >$@
+
+.for n in ${N1} ${N2}
+
+REGRESS_TARGETS +=	run-regress-ping-local-${n}
+run-regress-ping-local-${n}: stamp-setup
+	@echo '\n======== $@ ========'
+	# Ping localhost in routing domain ${n}.
+	/sbin/ping -n -w 1 -c 1 -V ${n} 127.0.0.1
+
+REGRESS_TARGETS +=	run-regress-ping-loop-${n}
+run-regress-ping-loop-${n}: stamp-setup
+	@echo '\n======== $@ ========'
+	# Ping non existing address with loopback route in routing domain ${n}.
+	! /sbin/ping -n -w 1 -c 1 -V ${n} 127.6.6.6
+
+REGRESS_TARGETS +=	run-regress-ping-address-${n}
+run-regress-ping-address-${n}: stamp-pfctl
+	@echo '\n======== $@ ========'
+	# Ping local address in routing domain ${n}.
+	/sbin/ping -n -w 1 -c 1 -V ${n} 127.0.0.${n}
+
+.endfor
+
+REGRESS_TARGETS +=	run-regress-ping-rdomain-pass
+run-regress-ping-rdomain-pass: stamp-pfctl
+	@echo '\n======== $@ ========'
+	# Pass ping packets between routing domains with pf rule.
+	/sbin/ping -n -w 1 -c 1 -V ${N1} 127.0.0.${N2}
+
+REGRESS_TARGETS +=	run-regress-ping-rdomain-block
+run-regress-ping-rdomain-block: stamp-pfctl
+	@echo '\n======== $@ ========'
+	# Check that reverse direction without pf rule is not allowed.
+	! /sbin/ping -n -w 1 -c 1 -V ${N2} 127.0.0.${N1}
+
+REGRESS_TARGETS +=	run-regress-cleanup
+run-regress-cleanup: stamp-setup
+	@echo '\n======== $@ ========'
+	${.MAKE} -C ${.CURDIR} unconfig
+
+CLEANFILES +=	addr.py *.pyc *.log stamp-*
+
+.include <bsd.regress.mk>
diff --git a/regress/sys/net/loop/pf.conf b/regress/sys/net/loop/pf.conf
new file mode 100644
index 00000000000..1587f5233e3
--- /dev/null
+++ b/regress/sys/net/loop/pf.conf
@@ -0,0 +1,3 @@
+# pf must have these rules in the regress anchor
+
+pass in on rdomain $N1 to $ADDR_N2 rtable $N2