# $NetBSD: t_ldp_regen.sh,v 1.11 2021/11/25 14:17:22 hannken Exp $
#
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# IP/MPLS & LDP label reallocation test
# Create 4 routers connected like this: R1--R2--R3--R4--
# The goal is to push packets from R1 to the R4 shmif1 (the right one) interface
# Enable MPLS forwarding on R2
# Disable IP forwarding and enable MPLS forwarding on R3
# Start ldpd and wait for adjancencies to come up
# Add an alias on shmif1 on R4 for which we already have a route on R3
# Now: * R4 should install label IMPLNULL for that prefix
#      * R3 should realloc the target label from IMPLNULL to something else

LDP_FLAGS=""

atf_test_case ldp_regen cleanup
ldp_regen_head() {

	atf_set "descr" "IP/MPLS and LDP label regeneration test"
	atf_set "require.progs" "rump_server"
	atf_set "use.fs" "true"
}

newaddr_and_ping() {

	# Add new address on R4
	RUMP_SERVER=${RUMP_SERVER4} atf_check -s exit:0 \
		rump.ifconfig shmif1 10.0.5.1/24 alias
	RUMP_SERVER=${RUMP_SERVER4} atf_check -s exit:0 \
		rump.ifconfig -w 60

	# Now ldpd on R5 should take notice of the new route and announce it
	# to R4's ldpd. ldpd on R4 should verify that the next hop
	# corresponds to its routing table and change its tag entry
	RUMP_SERVER=${RUMP_SERVER1} atf_check -s exit:0 -o ignore -e ignore \
		rump.ping -n -o -w 5 10.0.5.1
}

configservers() {

	# LDP HIJACK
	export RUMPHIJACK=path=/rump,socket=all,sysctl=yes
	export LD_PRELOAD=/usr/lib/librumphijack.so

	# Setup first server
	export RUMP_SERVER=${RUMP_SERVER1}
	atf_check -s exit:0 rump.ifconfig shmif0 create
	atf_check -s exit:0 rump.ifconfig shmif0 linkstr ./shdom1
	atf_check -s exit:0 rump.ifconfig shmif0 10.0.1.1/24
	atf_check -s exit:0 rump.ifconfig mpls0 create up
	atf_check -s exit:0 rump.sysctl -q -w net.inet.ip.forwarding=0
	atf_check -s exit:0 rump.route -q add 10.0.4.0/24 10.0.1.2
	atf_check -s exit:0 rump.route -q add 10.0.5.0/24 10.0.1.2
	atf_check -s exit:0 /usr/sbin/ldpd ${LDP_FLAGS}

	# Setup second server
	export RUMP_SERVER=${RUMP_SERVER2}
	atf_check -s exit:0 rump.ifconfig shmif0 create
	atf_check -s exit:0 rump.ifconfig shmif0 linkstr ./shdom1
	atf_check -s exit:0 rump.ifconfig shmif0 10.0.1.2/24
	atf_check -s exit:0 rump.ifconfig shmif1 create
	atf_check -s exit:0 rump.ifconfig shmif1 linkstr ./shdom2
	atf_check -s exit:0 rump.ifconfig shmif1 10.0.2.1/24
	atf_check -s exit:0 rump.ifconfig mpls0 create up
	atf_check -s exit:0 rump.sysctl -q -w net.mpls.accept=1
	atf_check -s exit:0 rump.sysctl -q -w net.mpls.forwarding=1
	# This one should still do ip forwarding because it announces IMPLNULL
	# for the 10.0.1.0/24 subnet
	atf_check -s exit:0 rump.route -q add 10.0.4.0/24 10.0.2.2
	atf_check -s exit:0 rump.route -q add 10.0.5.0/24 10.0.2.2
	atf_check -s exit:0 /usr/sbin/ldpd ${LDP_FLAGS}

	# Setup third server
	export RUMP_SERVER=${RUMP_SERVER3}
	atf_check -s exit:0 rump.ifconfig shmif0 create
	atf_check -s exit:0 rump.ifconfig shmif0 linkstr ./shdom2
	atf_check -s exit:0 rump.ifconfig shmif0 10.0.2.2/24
	atf_check -s exit:0 rump.ifconfig shmif1 create
	atf_check -s exit:0 rump.ifconfig shmif1 linkstr ./shdom3
	atf_check -s exit:0 rump.ifconfig shmif1 10.0.3.1/24
	atf_check -s exit:0 rump.ifconfig mpls0 create up
	atf_check -s exit:0 rump.sysctl -q -w net.mpls.accept=1
	atf_check -s exit:0 rump.sysctl -q -w net.mpls.forwarding=1
	atf_check -s exit:0 rump.sysctl -q -w net.inet.ip.forwarding=0
	atf_check -s exit:0 rump.route -q add 10.0.1.0/24 10.0.2.1
	atf_check -s exit:0 rump.route -q add 10.0.4.0/24 10.0.3.2
	atf_check -s exit:0 rump.route -q add 10.0.5.0/24 10.0.3.2
	atf_check -s exit:0 /usr/sbin/ldpd ${LDP_FLAGS}

	# Setup fourth server
	export RUMP_SERVER=${RUMP_SERVER4}
	atf_check -s exit:0 rump.ifconfig shmif0 create
	atf_check -s exit:0 rump.ifconfig shmif0 linkstr ./shdom3
	atf_check -s exit:0 rump.ifconfig shmif0 10.0.3.2/24
	atf_check -s exit:0 rump.ifconfig shmif1 create
	atf_check -s exit:0 rump.ifconfig shmif1 linkstr ./shdom4
	atf_check -s exit:0 rump.ifconfig shmif1 10.0.4.1/24
	atf_check -s exit:0 rump.sysctl -q -w net.inet.ip.forwarding=0
	atf_check -s exit:0 rump.ifconfig mpls0 create up
	atf_check -s exit:0 rump.route -q add 10.0.1.0/24 10.0.3.1
	atf_check -s exit:0 /usr/sbin/ldpd ${LDP_FLAGS}

	unset RUMP_SERVER
	unset LD_PRELOAD
	unset RUMPHIJACK
}

wait_ldp_ok() {

	RUMP_SERVER=${RUMP_SERVER1} atf_check -s exit:0 -o ignore -e ignore \
		rump.ifconfig -w 60
	RUMP_SERVER=${RUMP_SERVER1} atf_check -s exit:0 -o ignore -e ignore \
		rump.ping -o -w 60 10.0.4.1
}

ldp_regen_body() {

	if drvctl -l qemufwcfg0 >/dev/null 2>&1
	then
	    atf_skip "unreliable under qemu, skip until PR kern/43997 fixed"
	fi
	dostart
	configservers
	wait_ldp_ok
	newaddr_and_ping
}

ldp_regen_cleanup() {

	docleanup
}

atf_init_test_cases() {

	atf_add_test_case ldp_regen
}