From fcf4927632eecb25e40c8c5ac1e40df2090cc2eb Mon Sep 17 00:00:00 2001 From: Petr Machata Date: Thu, 2 Feb 2023 18:59:29 +0100 Subject: [PATCH] selftests: forwarding: lib: Add helpers for IP address handling In order to generate IGMPv3 and MLDv2 packets on the fly, we will need helpers to expand IPv4 and IPv6 addresses given as parameters in mausezahn payload notation. Add helpers that do it. Signed-off-by: Petr Machata Acked-by: Nikolay Aleksandrov Signed-off-by: David S. Miller --- tools/testing/selftests/net/forwarding/lib.sh | 37 +++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh index 736f56098cc7..9fe3004af6dc 100755 --- a/tools/testing/selftests/net/forwarding/lib.sh +++ b/tools/testing/selftests/net/forwarding/lib.sh @@ -1672,6 +1672,43 @@ hw_stats_monitor_test() log_test "${type}_stats notifications" } +ipv4_to_bytes() +{ + local IP=$1; shift + + printf '%02x:' ${IP//./ } | + sed 's/:$//' +} + +# Convert a given IPv6 address, `IP' such that the :: token, if present, is +# expanded, and each 16-bit group is padded with zeroes to be 4 hexadecimal +# digits. An optional `BYTESEP' parameter can be given to further separate +# individual bytes of each 16-bit group. +expand_ipv6() +{ + local IP=$1; shift + local bytesep=$1; shift + + local cvt_ip=${IP/::/_} + local colons=${cvt_ip//[^:]/} + local allcol=::::::: + # IP where :: -> the appropriate number of colons: + local allcol_ip=${cvt_ip/_/${allcol:${#colons}}} + + echo $allcol_ip | tr : '\n' | + sed s/^/0000/ | + sed 's/.*\(..\)\(..\)/\1'"$bytesep"'\2/' | + tr '\n' : | + sed 's/:$//' +} + +ipv6_to_bytes() +{ + local IP=$1; shift + + expand_ipv6 "$IP" : +} + igmpv3_is_in_get() { local igmpv3 -- 2.11.0