Commit 9ae85469 authored by Petr Machata's avatar Petr Machata Committed by David S. Miller
Browse files

selftests: forwarding: lib: Add helpers to build IGMP/MLD leave packets 



The testsuite that checks for mcast_max_groups functionality will need to
wipe the added groups as well. Add helpers to build an IGMP or MLD packets
announcing that host is leaving a given group.

Signed-off-by: default avatarPetr Machata <petrm@nvidia.com>
Acked-by: default avatarNikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 705d4bc7

tools/testing/selftests/net/forwarding/lib.sh

+50 −0
Original line number Diff line number Diff line
@@ -1794,6 +1794,21 @@ igmpv3_is_in_get() 
	payload_template_expand_checksum "$igmpv3" $checksum

}



igmpv2_leave_get()

{

	local GRP=$1; shift



	local payload=$(:

		)"17:"$(			: Type - Leave Group

		)"00:"$(			: Max Resp Time - not meaningful

		)"CHECKSUM:"$(			: Checksum

		)"$(ipv4_to_bytes $GRP)"$(	: Group Address

		)

	local checksum=$(payload_template_calc_checksum "$payload")



	payload_template_expand_checksum "$payload" $checksum

}



mldv2_is_in_get()

{

	local SIP=$1; shift
@@ -1837,3 +1852,38 @@ mldv2_is_in_get() 


	payload_template_expand_checksum "$hbh$icmpv6" $checksum

}



mldv1_done_get()

{

	local SIP=$1; shift

	local GRP=$1; shift



	local hbh

	local icmpv6



	hbh=$(:

		)"3a:"$(			: Next Header - ICMPv6

		)"00:"$(			: Hdr Ext Len

		)"00:00:00:00:00:00:"$(		: Options and Padding

		)



	icmpv6=$(:

		)"84:"$(			: Type - MLDv1 Done

		)"00:"$(			: Code

		)"CHECKSUM:"$(			: Checksum

		)"00:00:"$(			: Max Resp Delay - not meaningful

		)"00:00:"$(			: Reserved

		)"$(ipv6_to_bytes $GRP):"$(	: Multicast address

		)



	local len=$(u16_to_bytes $(payload_template_nbytes $icmpv6))

	local sudohdr=$(:

		)"$(ipv6_to_bytes $SIP):"$(	: SIP

		)"$(ipv6_to_bytes $GRP):"$(	: DIP is multicast address

	        )"${len}:"$(			: Upper-layer length

	        )"00:3a:"$(			: Zero and next-header

	        )

	local checksum=$(payload_template_calc_checksum ${sudohdr}${icmpv6})



	payload_template_expand_checksum "$hbh$icmpv6" $checksum

}