First commit SR MPLS

Change-Id: I961685a2a0e4c314049444c64eb6ccf877c278dd
Signed-off-by: Pablo Camarillo <pcamaril@cisco.com>

1 files changed, 325 insertions, 0 deletions

diff --git a/src/vnet/srv6/sr.h b/src/vnet/srv6/sr.h
new file mode 100755
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+++ b/src/vnet/srv6/sr.h
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+/*
+ * 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 data structures definitions
+ *
+ */
+
+#ifndef included_vnet_srv6_h
+#define included_vnet_srv6_h
+
+#include <vnet/vnet.h>
+#include <vnet/srv6/sr_packet.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/ethernet/ethernet.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#define IPv6_DEFAULT_HEADER_LENGTH 40
+#define IPv6_DEFAULT_HOP_LIMIT 64
+#define IPv6_DEFAULT_MAX_MASK_WIDTH 128
+
+#define SR_BEHAVIOR_END 1
+#define SR_BEHAVIOR_X 2
+#define SR_BEHAVIOR_D_FIRST 3	/* Unused. Separator in between regular and D */
+#define SR_BEHAVIOR_DX2 4
+#define SR_BEHAVIOR_DX6 5
+#define SR_BEHAVIOR_DX4 6
+#define SR_BEHAVIOR_DT6 7
+#define SR_BEHAVIOR_DT4 8
+#define SR_BEHAVIOR_LAST 9	/* Must always be the last one */
+
+#define SR_STEER_L2 2
+#define SR_STEER_IPV4 4
+#define SR_STEER_IPV6 6
+
+#define SR_FUNCTION_SIZE 4
+#define SR_ARGUMENT_SIZE 4
+
+#define SR_SEGMENT_LIST_WEIGHT_DEFAULT 1
+
+/**
+ * @brief SR Segment List (SID list)
+ */
+typedef struct
+{
+  ip6_address_t *segments;		/**< SIDs (key) */
+
+  u32 weight;						/**< SID list weight (wECMP / UCMP) */
+
+  u8 *rewrite;					/**< Precomputed rewrite header */
+  u8 *rewrite_bsid;				/**< Precomputed rewrite header for bindingSID */
+
+  dpo_id_t bsid_dpo;				/**< DPO for Encaps/Insert for BSID */
+  dpo_id_t ip6_dpo;				/**< DPO for Encaps/Insert IPv6 */
+  dpo_id_t ip4_dpo;				/**< DPO for Encaps IPv6 */
+} ip6_sr_sl_t;
+
+/* SR policy types */
+#define SR_POLICY_TYPE_DEFAULT 0
+#define SR_POLICY_TYPE_SPRAY 1
+/**
+ * @brief SR Policy
+ */
+typedef struct
+{
+  u32 *segments_lists;		/**< SID lists indexes (vector) */
+
+  ip6_address_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            */
+  dpo_id_t bsid_dpo;			/**< SR Policy specific DPO - BSID */
+  dpo_id_t ip4_dpo;			/**< SR Policy specific DPO - IPv6 */
+  dpo_id_t ip6_dpo;			/**< SR Policy specific DPO - IPv4 */
+
+  u32 fib_table;			/**< FIB table */
+
+  u8 is_encap;				/**< Mode (0 is SRH insert, 1 Encaps) */
+} ip6_sr_policy_t;
+
+/**
+ * @brief SR LocalSID
+ */
+typedef struct
+{
+  ip6_address_t localsid;		/**< LocalSID IPv6 address */
+
+  char end_psp;					/**< Combined with End.PSP? */
+
+  u16 behavior;					/**< Behavior associated to this localsid */
+
+  union
+  {
+    u32 sw_if_index;				/**< xconnect only */
+    u32 vrf_index;				/**< vrf only */
+  };
+
+  u32 fib_table;				/**< FIB table where localsid is registered */
+
+  u32 vlan_index;				/**< VLAN tag (not an index) */
+
+  ip46_address_t next_hop;		/**< Next_hop for xconnect usage only */
+
+  u32 nh_adj;						/**< Next_adj for xconnect usage only */
+
+  void *plugin_mem;				/**< Memory to be used by the plugin callback functions */
+} ip6_sr_localsid_t;
+
+typedef int (sr_plugin_callback_t) (ip6_sr_localsid_t * localsid);
+
+/**
+ * @brief SR LocalSID behavior registration
+ */
+typedef struct
+{
+  u16 sr_localsid_function_number;			/**< SR LocalSID plugin function (>SR_BEHAVIOR_LAST) */
+
+  u8 *function_name;							/**< Function name. (key). */
+
+  u8 *keyword_str;							/**< Behavior keyword (i.e. End.X) */
+
+  u8 *def_str;								/**< Behavior definition (i.e. Endpoint with cross-connect) */
+
+  u8 *params_str;							/**< Behavior parameters (i.e. <oif> <IP46next_hop>) */
+
+  dpo_type_t dpo;							/**< DPO type registration */
+
+  format_function_t *ls_format;				/**< LocalSID format function */
+
+  unformat_function_t *ls_unformat;			/**< LocalSID unformat function */
+
+  sr_plugin_callback_t *creation;			/**< Function within plugin that will be called after localsid creation*/
+
+  sr_plugin_callback_t *removal;			/**< Function within plugin that will be called before localsid removal */
+} sr_localsid_fn_registration_t;
+
+/**
+ * @brief Steering db key
+ *
+ * L3 is IPv4/IPv6 + mask
+ * L2 is sf_if_index + vlan
+ */
+typedef struct
+{
+  union
+  {
+    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 */
+    } l3;
+    struct
+    {
+      u32 sw_if_index;					/**< Incoming software interface */
+    } l2;
+  };
+  u8 traffic_type;					/**< Traffic type (IPv4, IPv6, L2) */
+  u8 padding[3];
+} sr_steering_key_t;
+
+typedef struct
+{
+  sr_steering_key_t classify;		/**< Traffic classification */
+  u32 sr_policy;					/**< SR Policy index */
+} ip6_sr_steering_policy_t;
+
+/**
+ * @brief Segment Routing main datastructure
+ */
+typedef struct
+{
+  /* L2-input -> SR rewrite next index */
+  u32 l2_sr_policy_rewrite_index;
+
+  /* SR SID lists */
+  ip6_sr_sl_t *sid_lists;
+
+  /* SRv6 policies */
+  ip6_sr_policy_t *sr_policies;
+
+  /* Hash table mapping BindingSID to SRv6 policy */
+  mhash_t sr_policies_index_hash;
+
+  /* Pool of SR localsid instances */
+  ip6_sr_localsid_t *localsids;
+
+  /* Hash table mapping LOC:FUNC to SR LocalSID instance */
+  mhash_t sr_localsids_index_hash;
+
+  /* Pool of SR steer policies instances */
+  ip6_sr_steering_policy_t *steer_policies;
+
+  /* Hash table mapping steering rules to SR steer instance */
+  mhash_t sr_steer_policies_hash;
+
+  /* L2 steering ifaces - sr_policies */
+  u32 *sw_iface_sr_policies;
+
+  /* Spray DPO */
+  dpo_type_t sr_pr_spray_dpo_type;
+
+  /* Plugin functions */
+  sr_localsid_fn_registration_t *plugin_functions;
+
+  /* Find plugin function by name */
+  uword *plugin_functions_by_key;
+
+  /* Counters */
+  vlib_combined_counter_main_t sr_ls_valid_counters;
+  vlib_combined_counter_main_t sr_ls_invalid_counters;
+
+  /* SR Policies FIBs */
+  u32 fib_table_ip6;
+  u32 fib_table_ip4;
+
+  /* convenience */
+  vlib_main_t *vlib_main;
+  vnet_main_t *vnet_main;
+} ip6_sr_main_t;
+
+extern ip6_sr_main_t sr_main;
+
+extern vlib_node_registration_t sr_policy_rewrite_encaps_node;
+extern vlib_node_registration_t sr_policy_rewrite_insert_node;
+extern vlib_node_registration_t sr_localsid_node;
+extern vlib_node_registration_t sr_localsid_d_node;
+
+extern void sr_dpo_lock (dpo_id_t * dpo);
+extern void sr_dpo_unlock (dpo_id_t * dpo);
+
+extern int
+sr_localsid_register_function (vlib_main_t * vm, u8 * fn_name,
+			       u8 * keyword_str, u8 * def_str,
+			       u8 * params_str, dpo_type_t * dpo,
+			       format_function_t * ls_format,
+			       unformat_function_t * ls_unformat,
+			       sr_plugin_callback_t * creation_fn,
+			       sr_plugin_callback_t * removal_fn);
+
+extern int
+sr_policy_add (ip6_address_t * bsid, ip6_address_t * segments,
+	       u32 weight, u8 behavior, u32 fib_table, u8 is_encap);
+extern int
+sr_policy_mod (ip6_address_t * bsid, u32 index, u32 fib_table,
+	       u8 operation, ip6_address_t * segments, u32 sl_index,
+	       u32 weight);
+extern int sr_policy_del (ip6_address_t * bsid, u32 index);
+
+extern int
+sr_cli_localsid (char is_del, ip6_address_t * localsid_addr,
+		 char end_psp, u8 behavior, u32 sw_if_index,
+		 u32 vlan_index, u32 fib_table, ip46_address_t * nh_addr,
+		 void *ls_plugin_mem);
+
+extern int
+sr_steering_policy (int is_del, ip6_address_t * bsid, u32 sr_policy_index,
+		    u32 table_id, ip46_address_t * prefix, u32 mask_width,
+		    u32 sw_if_index, u8 traffic_type);
+
+/**
+ * @brief SR rewrite string computation for SRH insertion (inline)
+ *
+ * @param sl is a vector of IPv6 addresses composing the Segment List
+ *
+ * @return precomputed rewrite string for SRH insertion
+ */
+static inline u8 *
+ip6_sr_compute_rewrite_string_insert (ip6_address_t * sl)
+{
+  ip6_sr_header_t *srh;
+  ip6_address_t *addrp, *this_address;
+  u32 header_length = 0;
+  u8 *rs = NULL;
+
+  header_length = 0;
+  header_length += sizeof (ip6_sr_header_t);
+  header_length += (vec_len (sl) + 1) * sizeof (ip6_address_t);
+
+  vec_validate (rs, header_length - 1);
+
+  srh = (ip6_sr_header_t *) rs;
+  srh->type = ROUTING_HEADER_TYPE_SR;
+  srh->segments_left = vec_len (sl);
+  srh->first_segment = vec_len (sl);
+  srh->length = ((sizeof (ip6_sr_header_t) +
+		  ((vec_len (sl) + 1) * sizeof (ip6_address_t))) / 8) - 1;
+  srh->flags = 0x00;
+  srh->reserved = 0x0000;
+  addrp = srh->segments + vec_len (sl);
+  vec_foreach (this_address, sl)
+  {
+    clib_memcpy (addrp->as_u8, this_address->as_u8, sizeof (ip6_address_t));
+    addrp--;
+  }
+  return rs;
+}
+
+
+#endif /* included_vnet_sr_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */