SR-MPLS: binary API and automated steering

Change-Id: Iacfbaaa91ea8bd92790dec9fce567063bdbc5d64
Signed-off-by: Pablo Camarillo <pcamaril@cisco.com>

1 files changed, 177 insertions, 0 deletions

diff --git a/src/vnet/srmpls/sr_mpls.h b/src/vnet/srmpls/sr_mpls.h
new file mode 100755
index 00000000000..5b04f76b7a7
--- /dev/null
+++ b/src/vnet/srmpls/sr_mpls.h
@@ -0,0 +1,177 @@
+/*
+ * Copyright (c) 2015 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 agreed 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.
+ */
+
+/**
+ * @file
+ * @brief Segment Routing MPLS data structures definitions
+ *
+ */
+
+#ifndef included_vnet_srmpls_h
+#define included_vnet_srmpls_h
+
+#include <vnet/vnet.h>
+#include <vnet/mpls/packet.h>
+#include <vnet/fib/mpls_fib.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ip/lookup.h>
+#include <vnet/dpo/dpo.h>
+#include <vnet/dpo/replicate_dpo.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+/* SR policy types */
+#define SR_POLICY_TYPE_DEFAULT 0
+#define SR_POLICY_TYPE_SPRAY 1
+
+#define SR_SEGMENT_LIST_WEIGHT_DEFAULT 1
+
+#define SR_STEER_IPV4 4
+#define SR_STEER_IPV6 6
+
+#define SR_TE_CO_BITS_00 0
+#define SR_TE_CO_BITS_01 1
+#define SR_TE_CO_BITS_10 2
+#define SR_TE_CO_BITS_11 3
+
+/**
+ * @brief SR Segment List (SID list)
+ */
+typedef struct
+{
+  /* SIDs (key) */
+  mpls_label_t *segments;
+
+  /* SID list weight (wECMP / UCMP) */
+  u32 weight;
+
+} mpls_sr_sl_t;
+
+typedef struct
+{
+  u32 *segments_lists;			/**< Pool of SID lists indexes */
+
+  mpls_label_t bsid;		/**< BindingSID (key) */
+
+  u8 type;			/**< Type (default is 0) */
+  /* SR Policy specific DPO                                       */
+  /* IF Type = DEFAULT Then Load Balancer DPO among SID lists     */
+  /* IF Type = SPRAY then Spray DPO with all SID lists            */
+
+  ip46_address_t endpoint;		/**< Optional NH for SR TE */
+  u8 endpoint_type;
+  u32 color;			/**< Optional color for SR TE */
+} mpls_sr_policy_t;
+
+/**
+ * @brief Steering db key
+ *
+ * L3 is IPv4/IPv6 + mask
+ */
+typedef struct
+{
+  ip46_address_t prefix;	/**< IP address of the prefix */
+  u32 mask_width;			/**< Mask width of the prefix */
+  u32 fib_table;			/**< VRF of the prefix */
+  u8 traffic_type;			/**< Traffic type (IPv4, IPv6, L2) */
+  u8 padding[3];
+} sr_mpls_steering_key_t;
+
+typedef struct
+{
+  sr_mpls_steering_key_t classify;		/**< Traffic classification */
+  mpls_label_t bsid;		/**< SR Policy index */
+  ip46_address_t next_hop;		/**< SR TE NH */
+  char nh_type;
+  u32 *color;			/**< Vector of SR TE colors */
+  char co_bits;			/**< Color-Only bits */
+  mpls_label_t vpn_label;
+} mpls_sr_steering_policy_t;
+
+/**
+ * @brief Segment Routing main datastructure
+ */
+typedef struct
+{
+  /* SR SID lists */
+  mpls_sr_sl_t *sid_lists;
+
+  /* SR MPLS policies */
+  mpls_sr_policy_t *sr_policies;
+
+  /* Hash table mapping BindingSID to SR MPLS policy */
+  uword *sr_policies_index_hash;
+
+  /* Pool of SR steer policies instances */
+  mpls_sr_steering_policy_t *steer_policies;
+
+  /* MHash table mapping steering rules to SR steer instance */
+  mhash_t sr_steer_policies_hash;
+
+  /** SR TE **/
+  /* Hash table mapping (Color->Endpoint->BSID) for SR policies */
+  mhash_t sr_policies_c2e2eclabel_hash;
+  /* SR TE (internal) fib table (Endpoint, Color) */
+  u32 fib_table_EC;
+  /* Pool of (Endpoint, Color) hidden labels */
+  u32 *ec_labels;
+
+  /* convenience */
+  vlib_main_t *vlib_main;
+  vnet_main_t *vnet_main;
+} mpls_sr_main_t;
+
+extern mpls_sr_main_t sr_mpls_main;
+
+extern int
+sr_mpls_policy_add (mpls_label_t bsid, mpls_label_t * segments,
+		    u8 behavior, u32 weight);
+
+extern int
+sr_mpls_policy_mod (mpls_label_t bsid, u8 operation,
+		    mpls_label_t * segments, u32 sl_index, u32 weight);
+
+extern int sr_mpls_policy_del (mpls_label_t bsid);
+
+extern int
+sr_mpls_policy_assign_endpoint_color (mpls_label_t bsid,
+				      ip46_address_t * endpoint,
+				      u8 endpoint_type, u32 color);
+
+extern int
+sr_mpls_steering_policy_add (mpls_label_t bsid, u32 table_id,
+			     ip46_address_t * prefix, u32 mask_width,
+			     u8 traffic_type, ip46_address_t * next_hop,
+			     u8 nh_type, u32 color, char co_bits,
+			     mpls_label_t vpn_label);
+
+extern int
+sr_mpls_steering_policy_del (ip46_address_t * prefix,
+			     u32 mask_width, u8 traffic_type, u32 table_id,
+			     u32 color);
+
+extern u32 find_or_create_internal_label (ip46_address_t endpoint, u32 color);
+
+extern void internal_label_lock (ip46_address_t endpoint, u32 color);
+
+extern void internal_label_unlock (ip46_address_t endpoint, u32 color);
+
+#endif /* included_vnet_sr_mpls_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables: eval: (c-set-style "gnu") End:
+ */