IPIP: Add IP{v4,v6} over IP{v4,v6} configured tunnel support.
Change-Id: I166301c9e2388bae5f70ec0179d663a2703e27f5
Signed-off-by: Ole Troan <ot@cisco.com>
diff --git a/src/vnet/ipip/ipip.h b/src/vnet/ipip/ipip.h
new file mode 100644
index 0000000..e9277d8
--- /dev/null
+++ b/src/vnet/ipip/ipip.h
@@ -0,0 +1,168 @@
+/*
+ * ipip.h: types/functions for ipip.
+ *
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or aipiped to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef included_ipip_h
+#define included_ipip_h
+
+#include <vnet/adj/adj_types.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/ip/format.h>
+#include <vnet/ip/ip.h>
+#include <vnet/vnet.h>
+
+extern vnet_hw_interface_class_t ipip_hw_interface_class;
+
+#define foreach_ipip_error \
+ /* Must be first. */ \
+ _(DECAP_PKTS, "packets decapsulated") \
+ _(BAD_PROTOCOL, "bad protocol") \
+ _(NO_TUNNEL, "no tunnel")
+
+typedef enum
+{
+#define _(sym, str) IPIP_ERROR_##sym,
+ foreach_ipip_error
+#undef _
+ IPIP_N_ERROR,
+} ipip_error_t;
+
+/**
+ * @brief IPIP Tunnel key
+ */
+typedef enum
+{
+ IPIP_TRANSPORT_IP4,
+ IPIP_TRANSPORT_IP6,
+} ipip_transport_t;
+
+typedef struct
+{
+ ipip_transport_t transport;
+ u32 fib_index;
+ ip46_address_t src;
+ ip46_address_t dst;
+} __attribute__ ((packed)) ipip_tunnel_key_t;
+
+typedef enum
+{
+ IPIP_MODE_P2P = 0,
+ IPIP_MODE_6RD,
+} ipip_mode_t;
+
+/**
+ * @brief A representation of a IPIP tunnel
+ */
+typedef struct
+{
+ ipip_mode_t mode;
+ ipip_transport_t transport;
+ ipip_tunnel_key_t *key;
+ ip46_address_t tunnel_src;
+ ip46_address_t tunnel_dst;
+ u32 fib_index;
+ u32 hw_if_index;
+ u32 sw_if_index;
+ u32 dev_instance; /* Real device instance in tunnel vector */
+ u32 user_instance; /* Instance name being shown to user */
+
+ union
+ {
+ struct
+ {
+ fib_node_t node;
+ fib_node_index_t fib_entry_index;
+ u32 sibling_index;
+ } p2p;
+ struct
+ {
+ ip6_address_t ip6_prefix;
+ ip4_address_t ip4_prefix;
+ u8 ip6_prefix_len;
+ u8 ip4_prefix_len;
+ u8 shift;
+ bool security_check;
+ } sixrd;
+ };
+} ipip_tunnel_t;
+
+typedef struct
+{
+ ipip_tunnel_t *tunnels;
+ uword *tunnel_by_key;
+ u32 *tunnel_index_by_sw_if_index;
+ fib_node_type_t fib_node_type;
+
+ /* convenience */
+ vlib_main_t *vlib_main;
+ vnet_main_t *vnet_main;
+
+ /* Record used instances */
+ uword *instance_used;
+
+ bool ip4_protocol_registered;
+ bool ip6_protocol_registered;
+} ipip_main_t;
+
+extern ipip_main_t ipip_main;
+extern vlib_node_registration_t ipip4_input_node;
+extern vlib_node_registration_t ipip6_input_node;
+
+/*
+ * sixrd_get_addr_net
+ */
+static_always_inline u32
+sixrd_get_addr_net (const ipip_tunnel_t * t, u64 dal)
+{
+ /* 1:1 mode */
+ if (t->sixrd.ip4_prefix_len == 32)
+ return (t->sixrd.ip4_prefix.as_u32);
+
+ dal = clib_net_to_host_u64 (dal);
+
+ /* Grab 32 - ip4_prefix_len bits out of IPv6 address from offset
+ * ip6_prefix_len */
+ u32 mask = ~(~0ULL << (32 - t->sixrd.ip4_prefix_len));
+ u32 ip4 =
+ clib_net_to_host_u32 (t->sixrd.
+ ip4_prefix.as_u32) | ((u32) (dal >> t->sixrd.
+ shift) & mask);
+ return clib_host_to_net_u32 (ip4);
+}
+
+int ipip_add_tunnel (ipip_transport_t transport, u32 instance,
+ ip46_address_t * src, ip46_address_t * dst,
+ u32 fib_index, u32 * sw_if_indexp);
+int ipip_del_tunnel (u32 sw_if_index);
+int sixrd_add_tunnel (ip6_address_t * ip6_prefix, u8 ip6_prefix_len,
+ ip4_address_t * ip4_prefix, u8 ip4_prefix_len,
+ ip4_address_t * ip4_src, bool security_check,
+ u32 fib_index, u32 * sw_if_index);
+int sixrd_del_tunnel (u32 sw_if_index);
+void ipip_tunnel_db_add (ipip_tunnel_t * t, ipip_tunnel_key_t * key);
+void ipip_tunnel_db_remove (ipip_tunnel_t * t);
+ipip_tunnel_t *ipip_tunnel_db_find (ipip_tunnel_key_t * key);
+ipip_tunnel_t *ipip_tunnel_db_find_by_sw_if_index (u32 sw_if_index);
+
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */