Commit fcf49276 authored by Petr Machata's avatar Petr Machata Committed by David S. Miller
Browse files

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: 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 f7ccf60c

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

+37 −0
Original line number Diff line number Diff line
@@ -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