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563f8e97e0
Use the new dscp_t type to replace the tos field of struct fib4_rule, so that fib4-rules consistently ignore ECN bits. Before this patch, fib4-rules did accept rules with the high order ECN bit set (but not the low order one). Also, it relied on its callers masking the ECN bits of ->flowi4_tos to prevent those from influencing the result. This was brittle and a few call paths still do the lookup without masking the ECN bits first. After this patch fib4-rules only compare the DSCP bits. ECN can't influence the result anymore, even if the caller didn't mask these bits. Also, fib4-rules now must have both ECN bits cleared or they will be rejected. Signed-off-by: Guillaume Nault <gnault@redhat.com> Acked-by: David Ahern <dsahern@kernel.org> Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
328 lines
7.2 KiB
Bash
Executable File
328 lines
7.2 KiB
Bash
Executable File
#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# This test is for checking IPv4 and IPv6 FIB rules API
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# Kselftest framework requirement - SKIP code is 4.
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ksft_skip=4
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ret=0
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PAUSE_ON_FAIL=${PAUSE_ON_FAIL:=no}
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IP="ip -netns testns"
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RTABLE=100
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GW_IP4=192.51.100.2
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SRC_IP=192.51.100.3
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GW_IP6=2001:db8:1::2
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SRC_IP6=2001:db8:1::3
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DEV_ADDR=192.51.100.1
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DEV_ADDR6=2001:db8:1::1
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DEV=dummy0
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log_test()
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{
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local rc=$1
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local expected=$2
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local msg="$3"
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if [ ${rc} -eq ${expected} ]; then
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nsuccess=$((nsuccess+1))
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printf "\n TEST: %-50s [ OK ]\n" "${msg}"
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else
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ret=1
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nfail=$((nfail+1))
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printf "\n TEST: %-50s [FAIL]\n" "${msg}"
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if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
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echo
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echo "hit enter to continue, 'q' to quit"
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read a
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[ "$a" = "q" ] && exit 1
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fi
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fi
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}
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log_section()
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{
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echo
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echo "######################################################################"
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echo "TEST SECTION: $*"
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echo "######################################################################"
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}
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setup()
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{
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set -e
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ip netns add testns
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$IP link set dev lo up
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$IP link add dummy0 type dummy
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$IP link set dev dummy0 up
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$IP address add $DEV_ADDR/24 dev dummy0
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$IP -6 address add $DEV_ADDR6/64 dev dummy0
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set +e
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}
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cleanup()
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{
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$IP link del dev dummy0 &> /dev/null
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ip netns del testns
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}
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fib_check_iproute_support()
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{
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ip rule help 2>&1 | grep -q $1
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if [ $? -ne 0 ]; then
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echo "SKIP: iproute2 iprule too old, missing $1 match"
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return 1
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fi
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ip route get help 2>&1 | grep -q $2
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if [ $? -ne 0 ]; then
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echo "SKIP: iproute2 get route too old, missing $2 match"
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return 1
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fi
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return 0
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}
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fib_rule6_del()
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{
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$IP -6 rule del $1
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log_test $? 0 "rule6 del $1"
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}
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fib_rule6_del_by_pref()
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{
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pref=$($IP -6 rule show $1 table $RTABLE | cut -d ":" -f 1)
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$IP -6 rule del pref $pref
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}
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fib_rule6_test_match_n_redirect()
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{
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local match="$1"
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local getmatch="$2"
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local description="$3"
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$IP -6 rule add $match table $RTABLE
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$IP -6 route get $GW_IP6 $getmatch | grep -q "table $RTABLE"
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log_test $? 0 "rule6 check: $description"
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fib_rule6_del_by_pref "$match"
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log_test $? 0 "rule6 del by pref: $description"
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}
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fib_rule6_test_reject()
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{
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local match="$1"
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local rc
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$IP -6 rule add $match table $RTABLE 2>/dev/null
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rc=$?
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log_test $rc 2 "rule6 check: $match"
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if [ $rc -eq 0 ]; then
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$IP -6 rule del $match table $RTABLE
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fi
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}
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fib_rule6_test()
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{
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local getmatch
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local match
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local cnt
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# setup the fib rule redirect route
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$IP -6 route add table $RTABLE default via $GW_IP6 dev $DEV onlink
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match="oif $DEV"
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fib_rule6_test_match_n_redirect "$match" "$match" "oif redirect to table"
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match="from $SRC_IP6 iif $DEV"
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fib_rule6_test_match_n_redirect "$match" "$match" "iif redirect to table"
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# Reject dsfield (tos) options which have ECN bits set
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for cnt in $(seq 1 3); do
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match="dsfield $cnt"
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fib_rule6_test_reject "$match"
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done
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# Don't take ECN bits into account when matching on dsfield
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match="tos 0x10"
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for cnt in "0x10" "0x11" "0x12" "0x13"; do
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# Using option 'tos' instead of 'dsfield' as old iproute2
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# versions don't support 'dsfield' in ip rule show.
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getmatch="tos $cnt"
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fib_rule6_test_match_n_redirect "$match" "$getmatch" \
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"$getmatch redirect to table"
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done
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match="fwmark 0x64"
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getmatch="mark 0x64"
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fib_rule6_test_match_n_redirect "$match" "$getmatch" "fwmark redirect to table"
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fib_check_iproute_support "uidrange" "uid"
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if [ $? -eq 0 ]; then
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match="uidrange 100-100"
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getmatch="uid 100"
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fib_rule6_test_match_n_redirect "$match" "$getmatch" "uid redirect to table"
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fi
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fib_check_iproute_support "sport" "sport"
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if [ $? -eq 0 ]; then
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match="sport 666 dport 777"
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fib_rule6_test_match_n_redirect "$match" "$match" "sport and dport redirect to table"
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fi
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fib_check_iproute_support "ipproto" "ipproto"
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if [ $? -eq 0 ]; then
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match="ipproto tcp"
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fib_rule6_test_match_n_redirect "$match" "$match" "ipproto match"
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fi
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fib_check_iproute_support "ipproto" "ipproto"
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if [ $? -eq 0 ]; then
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match="ipproto ipv6-icmp"
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fib_rule6_test_match_n_redirect "$match" "$match" "ipproto ipv6-icmp match"
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fi
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}
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fib_rule4_del()
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{
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$IP rule del $1
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log_test $? 0 "del $1"
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}
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fib_rule4_del_by_pref()
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{
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pref=$($IP rule show $1 table $RTABLE | cut -d ":" -f 1)
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$IP rule del pref $pref
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}
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fib_rule4_test_match_n_redirect()
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{
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local match="$1"
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local getmatch="$2"
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local description="$3"
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$IP rule add $match table $RTABLE
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$IP route get $GW_IP4 $getmatch | grep -q "table $RTABLE"
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log_test $? 0 "rule4 check: $description"
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fib_rule4_del_by_pref "$match"
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log_test $? 0 "rule4 del by pref: $description"
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}
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fib_rule4_test_reject()
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{
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local match="$1"
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local rc
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$IP rule add $match table $RTABLE 2>/dev/null
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rc=$?
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log_test $rc 2 "rule4 check: $match"
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if [ $rc -eq 0 ]; then
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$IP rule del $match table $RTABLE
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fi
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}
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fib_rule4_test()
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{
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local getmatch
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local match
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local cnt
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# setup the fib rule redirect route
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$IP route add table $RTABLE default via $GW_IP4 dev $DEV onlink
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match="oif $DEV"
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fib_rule4_test_match_n_redirect "$match" "$match" "oif redirect to table"
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# need enable forwarding and disable rp_filter temporarily as all the
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# addresses are in the same subnet and egress device == ingress device.
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ip netns exec testns sysctl -qw net.ipv4.ip_forward=1
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ip netns exec testns sysctl -qw net.ipv4.conf.$DEV.rp_filter=0
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match="from $SRC_IP iif $DEV"
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fib_rule4_test_match_n_redirect "$match" "$match" "iif redirect to table"
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ip netns exec testns sysctl -qw net.ipv4.ip_forward=0
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# Reject dsfield (tos) options which have ECN bits set
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for cnt in $(seq 1 3); do
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match="dsfield $cnt"
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fib_rule4_test_reject "$match"
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done
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# Don't take ECN bits into account when matching on dsfield
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match="tos 0x10"
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for cnt in "0x10" "0x11" "0x12" "0x13"; do
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# Using option 'tos' instead of 'dsfield' as old iproute2
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# versions don't support 'dsfield' in ip rule show.
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getmatch="tos $cnt"
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fib_rule4_test_match_n_redirect "$match" "$getmatch" \
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"$getmatch redirect to table"
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done
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match="fwmark 0x64"
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getmatch="mark 0x64"
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fib_rule4_test_match_n_redirect "$match" "$getmatch" "fwmark redirect to table"
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fib_check_iproute_support "uidrange" "uid"
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if [ $? -eq 0 ]; then
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match="uidrange 100-100"
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getmatch="uid 100"
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fib_rule4_test_match_n_redirect "$match" "$getmatch" "uid redirect to table"
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fi
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fib_check_iproute_support "sport" "sport"
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if [ $? -eq 0 ]; then
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match="sport 666 dport 777"
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fib_rule4_test_match_n_redirect "$match" "$match" "sport and dport redirect to table"
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fi
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fib_check_iproute_support "ipproto" "ipproto"
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if [ $? -eq 0 ]; then
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match="ipproto tcp"
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fib_rule4_test_match_n_redirect "$match" "$match" "ipproto tcp match"
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fi
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fib_check_iproute_support "ipproto" "ipproto"
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if [ $? -eq 0 ]; then
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match="ipproto icmp"
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fib_rule4_test_match_n_redirect "$match" "$match" "ipproto icmp match"
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fi
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}
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run_fibrule_tests()
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{
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log_section "IPv4 fib rule"
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fib_rule4_test
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log_section "IPv6 fib rule"
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fib_rule6_test
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}
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if [ "$(id -u)" -ne 0 ];then
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echo "SKIP: Need root privileges"
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exit $ksft_skip
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fi
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if [ ! -x "$(command -v ip)" ]; then
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echo "SKIP: Could not run test without ip tool"
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exit $ksft_skip
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fi
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# start clean
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cleanup &> /dev/null
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setup
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run_fibrule_tests
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cleanup
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if [ "$TESTS" != "none" ]; then
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printf "\nTests passed: %3d\n" ${nsuccess}
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printf "Tests failed: %3d\n" ${nfail}
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fi
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exit $ret
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