netdev - [PATCH net-next v3 14/16] selftests: forwarding: lib: Allow list of IPs for IGMPv3/MLDv2

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Date:   Thu, 2 Feb 2023 18:59:32 +0100
From:   Petr Machata <petrm@...dia.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <razor@...ckwall.org>,
        <netdev@...r.kernel.org>
CC:     <bridge@...ts.linux-foundation.org>,
        Petr Machata <petrm@...dia.com>,
        "Ido Schimmel" <idosch@...dia.com>
Subject: [PATCH net-next v3 14/16] selftests: forwarding: lib: Allow list of IPs for IGMPv3/MLDv2

The testsuite that checks for mcast_max_groups functionality will need
to generate IGMP and MLD packets with configurable number of (S,G)
addresses. To that end, further extend igmpv3_is_in_get() and
mldv2_is_in_get() to allow a list of IP addresses instead of one
address.

Signed-off-by: Petr Machata <petrm@...dia.com>
Acked-by: Nikolay Aleksandrov <razor@...ckwall.org>
---
 tools/testing/selftests/net/forwarding/lib.sh | 22 +++++++++++++------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index 190e49e60508..12ef34ebcbbf 100755
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -1789,11 +1789,12 @@ payload_template_nbytes()
 igmpv3_is_in_get()
 {
 	local GRP=$1; shift
-	local IP=$1; shift
+	local sources=("$@")
 
 	local igmpv3
+	local nsources=$(u16_to_bytes ${#sources[@]})
 
-	# IS_IN ( $IP )
+	# IS_IN ( $sources )
 	igmpv3=$(:
 		)"22:"$(			: Type - Membership Report
 		)"00:"$(			: Reserved
@@ -1802,9 +1803,12 @@ igmpv3_is_in_get()
 		)"00:01:"$(			: Number of Group Records
 		)"01:"$(			: Record Type - IS_IN
 		)"00:"$(			: Aux Data Len
-		)"00:01:"$(			: Number of Sources
+		)"${nsources}:"$(		: Number of Sources
 		)"$(ipv4_to_bytes $GRP):"$(	: Multicast Address
-		)"$(ipv4_to_bytes $IP)"$(	: Source Address
+		)"$(for src in "${sources[@]}"; do
+			ipv4_to_bytes $src
+			echo -n :
+		    done)"$(			: Source Addresses
 		)
 	local checksum=$(payload_template_calc_checksum "$igmpv3")
 
@@ -1815,10 +1819,11 @@ mldv2_is_in_get()
 {
 	local SIP=$1; shift
 	local GRP=$1; shift
-	local IP=$1; shift
+	local sources=("$@")
 
 	local hbh
 	local icmpv6
+	local nsources=$(u16_to_bytes ${#sources[@]})
 
 	hbh=$(:
 		)"3a:"$(			: Next Header - ICMPv6
@@ -1834,9 +1839,12 @@ mldv2_is_in_get()
 		)"00:01:"$(			: Number of Group Records
 		)"01:"$(			: Record Type - IS_IN
 		)"00:"$(			: Aux Data Len
-		)"00:01:"$(			: Number of Sources
+		)"${nsources}:"$(		: Number of Sources
 		)"$(ipv6_to_bytes $GRP):"$(	: Multicast address
-		)"$(ipv6_to_bytes $IP):"$(	: Source Address
+		)"$(for src in "${sources[@]}"; do
+			ipv6_to_bytes $src
+			echo -n :
+		    done)"$(			: Source Addresses
 		)
 
 	local len=$(u16_to_bytes $(payload_template_nbytes $icmpv6))
-- 
2.39.0