[NETFILTER6]: Add new ip6tables HOPLIMIT target
This target allows users to modify the hoplimit header field of the
IPv6 header.
Signed-off-by: Harald Welte <laforge@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/netfilter/Kconfig b/net/ipv6/netfilter/Kconfig
index 8a10c2d..216fbe1a 100644
--- a/net/ipv6/netfilter/Kconfig
+++ b/net/ipv6/netfilter/Kconfig
@@ -239,6 +239,22 @@
To compile it as a module, choose M here. If unsure, say N.
+config IP6_NF_TARGET_HL
+ tristate 'HL (hoplimit) target support'
+ depends on IP6_NF_MANGLE
+ help
+ This option adds a `HL' target, which enables the user to decrement
+ the hoplimit value of the IPv6 header or set it to a given (lower)
+ value.
+
+ While it is safe to decrement the hoplimit value, this option also
+ enables functionality to increment and set the hoplimit value of the
+ IPv6 header to arbitrary values. This is EXTREMELY DANGEROUS since
+ you can easily create immortal packets that loop forever on the
+ network.
+
+ To compile it as a module, choose M here. If unsure, say N.
+
#dep_tristate ' LOG target support' CONFIG_IP6_NF_TARGET_LOG $CONFIG_IP6_NF_IPTABLES
config IP6_NF_RAW
tristate 'raw table support (required for TRACE)'