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authorOle Troan <ot@cisco.com>2018-05-24 13:21:43 +0200
committerNeale Ranns <nranns@cisco.com>2018-05-25 00:11:30 +0000
commitd57f63698f99fad0288ac040d83b3ecd380d4bfd (patch)
tree863864e2228e611fc357e9049e44e13416253b82 /src/vnet/ipip/ipip.api
parentada24ea7012448b75d57ab87a6b7796c55bc44f5 (diff)
VPP-1277: IPIP - Copy TOS/TC from inner packet to outer.
Add support for either copying TOS/TC from inner packet to outer, or set to fixed value. Change-Id: I716a95f875349acec94317b266c8cf9f2f81a785 Signed-off-by: Ole Troan <ot@cisco.com>
Diffstat (limited to 'src/vnet/ipip/ipip.api')
-rw-r--r--src/vnet/ipip/ipip.api66
1 files changed, 56 insertions, 10 deletions
diff --git a/src/vnet/ipip/ipip.api b/src/vnet/ipip/ipip.api
index 988eee599b1..95fc48a5962 100644
--- a/src/vnet/ipip/ipip.api
+++ b/src/vnet/ipip/ipip.api
@@ -13,17 +13,46 @@
* limitations under the License.
*/
-option version = "1.0.0";
+/**
+ * The IPIP module implements IP{v4,v6} over IP{v4,v6} tunnelling as
+ * described in RFC2473 and to some extent the largely historical
+ * RFC1853. The module also supports an IPv4 over IPv6 automatic
+ * tunnelling mechanism called 6RD (RFC5969).
+ *
+ * The IPIP API module supports a CRD model for adding, deleting and
+ * listing tunnels. A tunnel is represented as an interface in
+ * VPP. The "handle" representing a tunnel is the sw_if_index. As any
+ * interface, the user must configure an IPv4 and/or IPv6 address on
+ * the interface. This is the inner or payload protocol.
+ *
+ * Tunnel MTU: The tunnel MTU (the payload MTU) is configurable per
+ * protocol. If a tunnel MTU is larger than the path MTU, the outer
+ * packet will be fragmented. Fragmentation support is configurable,
+ * as it can have severe performance issues, and might be used as an
+ * attack vector (the remote side must reassemble.)
+ *
+ * Traffic class / TOS field can either be configured to a fixed
+ * value, or can be copied from the inner to the outer header.
+ * (For now we have stolen ~0 to indicate copy).
+ *
+ * Note:
+ *
+ * - The Tunnel encapsulation limit described in RFC2473 is not
+ * implemented.
+ *
+ * - ICMP proxying, as in a tunnel head-end receiving ICMP erors on
+ * the outer packet is currently not relayed to the original source
+ * of the packet.
+ *
+ * - PMTUD / MTU probing and tunnel keepalives are not yet implemented.
+ *
+ */
+
+option version = "1.1.0";
-/** \brief Create or delete an IPIP tunnel
- @param client_index - opaque cookie to identify the sender
- @param context - sender context, to match reply w/ request
- @param is_ipv6 - Use 0 for IPv4, 1 for IPv6
- @param instance - optional unique custom device instance, else ~0.
- @param src_address - Source IP address
- @param dst_address - Destination IP address, can be multicast
- @param fib_index - Encap FIB table ID
-*/
+/**
+ * Create an IP{v4,v6} over IP{v4,v6} tunnel.
+ */
define ipip_add_tunnel
{
u32 client_index;
@@ -33,6 +62,8 @@ define ipip_add_tunnel
u8 src_address[16];
u8 dst_address[16];
u32 fib_index;
+ u8 tc_tos; /* If ~0, the TOS/TC value is copied from
+ inner packet, otherwise set to value */
};
define ipip_add_tunnel_reply
@@ -42,6 +73,9 @@ define ipip_add_tunnel_reply
u32 sw_if_index;
};
+/**
+ * Delete an IP{v4,v6} over IP{v4,v6} tunnel.
+ */
autoreply define ipip_del_tunnel
{
u32 client_index;
@@ -49,6 +83,9 @@ autoreply define ipip_del_tunnel
u32 sw_if_index;
};
+/**
+ * Create an IPv4 over IPv6 automatic tunnel (6RD)
+ */
define ipip_6rd_add_tunnel
{
u32 client_index;
@@ -60,6 +97,8 @@ define ipip_6rd_add_tunnel
u8 ip6_prefix_len;
u8 ip4_prefix_len;
u8 security_check;
+ u8 tc_tos; /* If ~0, the TOS/TC value is copied from
+ inner packet, otherwise set to value */
};
define ipip_6rd_add_tunnel_reply
@@ -69,6 +108,9 @@ define ipip_6rd_add_tunnel_reply
u32 sw_if_index;
};
+/**
+ * Delete an IPv4 over IPv6 automatic tunnel (6RD)
+ */
autoreply define ipip_6rd_del_tunnel
{
u32 client_index;
@@ -76,6 +118,9 @@ autoreply define ipip_6rd_del_tunnel
u32 sw_if_index;
};
+/**
+ * List all IPIP tunnels
+ */
define ipip_tunnel_dump
{
u32 client_index;
@@ -92,6 +137,7 @@ define ipip_tunnel_details
u8 src_address[16];
u8 dst_address[16];
u32 fib_index;
+ u8 tc_tos;
};
/*