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Support matching and modifying IP TTL.

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Add support matching the IPv4 TTL and IPv6 hop limit fields.  This
commit also adds support for modifying the IPv4 TTL.  Modifying the IPv6
hop limit isn't currently supported, since we don't support modifying
IPv6 headers.

We will likely want to change the user-space interface, since basic
matching and setting the TTL are not generally useful.  We will probably
want the ability to match on extraordinary events (such as TTL of 0 or 1)
and a decrement action.

Feature #8024

Signed-off-by: Justin Pettit <jpettit@nicira.com>
Acked-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Justin Pettit
2011-11-05 15:48:12 -07:00
parent 530180fd5a
commit a61680c6d1
26 changed files with 208 additions and 72 deletions
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2
include/linux/openvswitch.h
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@@ -316,6 +316,7 @@ struct ovs_key_ipv4 {
__be32 ipv4_dst;
__u8 ipv4_proto;
__u8 ipv4_tos;
__u8 ipv4_ttl;
__u8 ipv4_frag; /* One of OVS_FRAG_TYPE_*. */
};
@@ -325,6 +326,7 @@ struct ovs_key_ipv6 {
__be32 ipv6_label; /* 20-bits in least-significant bits. */
__u8 ipv6_proto;
__u8 ipv6_tos;
__u8 ipv6_hlimit;
__u8 ipv6_frag; /* One of OVS_FRAG_TYPE_*. */
};