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Improve is_ipv6_enabled() (thx stanv@).

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Check if module ipv6 is loaded, but disabled by sysctl
configuration.
Also add optional argument to check ipv6 per interface.
This commit is contained in:
Mikhail Efremov 2014-10-07 20:41:03 +04:00
parent 39af5f3d6e
commit 535e489ef1
1 changed files with 17 additions and 1 deletions
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alterator-net-functions/alterator-net-functions
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@ -52,9 +52,25 @@ valid_ipv4addr()
### IPv6 helpers
# argument (interface name) is optional
is_ipv6_enabled()
{
[ -e /proc/net/if_inet6 ]
local iface="${1-}"
# Check if module ipv6 is not loaded or disabled
[ -e /proc/net/if_inet6 ] || return 1
# Check if ipv6 disabled by sysctl
if [ -n "$iface" -a -e /proc/sys/net/ipv6/conf/"$iface"/disable_ipv6 ]; then
[ "$(cat /proc/sys/net/ipv6/conf/"$iface"/disable_ipv6)" = '0' ] &&
return 0 || return 1
fi
if [ -e /proc/sys/net/ipv6/conf/all/disable_ipv6 ]; then
[ "$(cat /proc/sys/net/ipv6/conf/all/disable_ipv6)" = '0' ] &&
return 0
fi
return 1
}
valid_ipv6addr()