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selftests: forwarding: bridge_mdb_max: Fix failing test with old libnet 

As explained in commit 8bcfb4ae4d ("selftests: forwarding: Fix failing
tests with old libnet"), old versions of libnet (used by mausezahn) do
not use the "SO_BINDTODEVICE" socket option. For IP unicast packets,
this can be solved by prefixing mausezahn invocations with "ip vrf
exec". However, IP multicast packets do not perform routing and simply
egress the bound device, which does not exist in this case.

Fix by specifying the source and destination MAC of the packet which
will cause mausezahn to use a packet socket instead of an IP socket.

Fixes: 3446dcd7df ("selftests: forwarding: bridge_mdb_max: Add a new selftest")
Reported-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
Closes: https://lore.kernel.org/netdev/adc5e40d-d040-a65e-eb26-edf47dac5b02@alu.unizg.hr/
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
Reviewed-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://lore.kernel.org/r/20230808141503.4060661-17-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ido Schimmel 2023-08-08 17:15:02 +03:00 committed by Jakub Kicinski
parent e98e195d90
commit cb034948ac
1 changed files with 10 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
tools/testing/selftests/net/forwarding/bridge_mdb_max.sh
View File

@ -252,7 +252,8 @@ ctl4_entries_add()
local IPs=$(seq -f 192.0.2.%g 1 $((n - 1)))
local peer=$(locus_dev_peer $locus)
local GRP=239.1.1.${grp}
$MZ $peer -c 1 -A 192.0.2.1 -B $GRP \
local dmac=01:00:5e:01:01:$(printf "%02x" $grp)
$MZ $peer -a own -b $dmac -c 1 -A 192.0.2.1 -B $GRP \
-t ip proto=2,p=$(igmpv3_is_in_get $GRP $IPs) -q
sleep 1
@ -272,7 +273,8 @@ ctl4_entries_del()
local peer=$(locus_dev_peer $locus)
local GRP=239.1.1.${grp}
$MZ $peer -c 1 -A 192.0.2.1 -B 224.0.0.2 \
local dmac=01:00:5e:00:00:02
$MZ $peer -a own -b $dmac -c 1 -A 192.0.2.1 -B 224.0.0.2 \
-t ip proto=2,p=$(igmpv2_leave_get $GRP) -q
sleep 1
! bridge mdb show dev br0 | grep -q $GRP
@ -289,8 +291,10 @@ ctl6_entries_add()
local peer=$(locus_dev_peer $locus)
local SIP=fe80::1
local GRP=ff0e::${grp}
local dmac=33:33:00:00:00:$(printf "%02x" $grp)
local p=$(mldv2_is_in_get $SIP $GRP $IPs)
$MZ -6 $peer -c 1 -A $SIP -B $GRP -t ip hop=1,next=0,p="$p" -q
$MZ -6 $peer -a own -b $dmac -c 1 -A $SIP -B $GRP \
-t ip hop=1,next=0,p="$p" -q
sleep 1
local nn=$(bridge mdb show dev br0 | grep $GRP | wc -l)
@ -310,8 +314,10 @@ ctl6_entries_del()
local peer=$(locus_dev_peer $locus)
local SIP=fe80::1
local GRP=ff0e::${grp}
local dmac=33:33:00:00:00:$(printf "%02x" $grp)
local p=$(mldv1_done_get $SIP $GRP)
$MZ -6 $peer -c 1 -A $SIP -B $GRP -t ip hop=1,next=0,p="$p" -q
$MZ -6 $peer -a own -b $dmac -c 1 -A $SIP -B $GRP \
-t ip hop=1,next=0,p="$p" -q
sleep 1
! bridge mdb show dev br0 | grep -q $GRP
}