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2019-02-04session: cleanup part 1Florin Coras1-20/+20
Rename core data structures. This will break compatibility for out of tree builtin apps. - stream_session_t to session_t - server_rx/tx_fifo to rx/tx_fifo - stream_session.h to session_types.h - update copyright Change-Id: I414097c6e28bcbea866fbf13b8773c7db3f49325 Signed-off-by: Florin Coras <fcoras@cisco.com>
2019-01-12session: generate wrong thread errors instead of crashingFlorin Coras1-10/+24
Change-Id: I7e59ae718d2722c49d42b22a0874e1645a191e89 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-11-18vcl/session: apps with process workersFlorin Coras1-2/+2
Allow apps to register child processes as app workers. In particular, on fork vcl now registers the child process with vpp as a new worker. Change-Id: I52a65fbc3292962b1f6e1fe0f6153f739e6e0d4a Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-10-23c11 safe string handling supportDave Barach1-9/+9
Change-Id: Ied34720ca5a6e6e717eea4e86003e854031b6eab Signed-off-by: Dave Barach <dave@barachs.net>
2018-08-24session: add support for multiple app workersFlorin Coras1-6/+10
Refactor session layer to support multiple workers per application. Change-Id: Ie67354688d396449d14bbbb8c56050206e307cd8 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-07-27vcl: use events for epoll/select/read/writeFlorin Coras1-2/+3
Have vcl poll and wait on the event message queues as opposed to constantly polling the session fifos. This also adds event signaling to cut through sessions. On the downside, because we can't wait on multiple condvars, i.e., when we have multiple message queues because of cut-through registrations, we do timed waits. Change-Id: I29ade95dba449659fe46008bb1af502276a7c5fd Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-06-22session: improve session lookup speedsFlorin Coras1-57/+24
It would seem that this avoids using the stack for computing the subsequent crc32 by storing the 2 x u64 ip4 5-tuple key into two registers. Probably the cast to the "convenience" data structure "masks" the fact that the key is 16B. Probably ... :-) "sh run" on an ip4 tcp sender reports that the number of clocks spent in tcp_input, where a session lookup is performed, drops ~25% (from ~100 clocks/packet to ~75 clocks/packet) Change-Id: I50d647115ac72f8407bff7e3b73328ba42f0ddb5 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-04-16session: use generic session pool for listenersFlorin Coras1-10/+6
Change-Id: I825f3822910a6ee368b9004e39ca16ac6833e30c Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-03-01session: zero out ips in local endpoint lookup only if localFlorin Coras1-29/+61
Change-Id: I3425b1533b3d31210166e7b3798685464ad1c489 Signed-off-by: Florin Coras <fcoras@cisco.com>
2018-02-14session: support local sessions and deprecate redirectsFlorin Coras1-52/+24
Memfd backed shared memory segments can only be negotiated over sockets. For such scenarios, the existing redirect mechanism that establishes cut-through sessions does not work anymore as the two peer application do not share such a socket. This patch adds support for local sessions, as opposed to sessions backed by a transport connection, in a way that is almost transparent to the two applications by reusing the existing binary api messages. Moreover, all segment allocations are now entirely done through the segment manager valloc, so segment overlaps due to independent allocations previously required for redirects are completely avoided. The one notable characteristic of local sessions (cut-through from app perspective) notification messages is that they carry pointers to two event queues, one for each app peer, instead of one. For transport-backed sessions one of the queues can be inferred but for local session they cannot. Change-Id: Ia443fb63e2d9d8e43490275062a708f039038175 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-12-22tcp: add builtin server/client transfer testFlorin Coras1-0/+1
Change-Id: Iab0baabf2f27bc7ad7fbf2d2789a493752b07d8a Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-12-11session: generalize handling of network transportsFlorin Coras1-57/+49
- compute session type out of transport and network protos - make session, session lookup and session queue code network protocol agnostic This does not update the session layer to support non-ip network layer protocols Change-Id: Ifc2f92845e158b649d59462eb7d51c12af536691 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-20session/tcp: filtering improvementsFlorin Coras1-70/+82
- make allow action explicit (-3) - add session lookup is_filtered return flag that is set if lookup hit a deny filter - change tcp logic to drop filtered packets when punting is enabled Change-Id: Ic38f294424663a4e108439b7571511f46f8e0be1 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-10session: use listener logic for proxy rulesFlorin Coras1-1/+65
This moves session proxy logic from session rules tables to table/logic used to manage session listeners in order to avoid overlap of semantically different rules. Change-Id: I463522cce91b92d942f6a2086fb14c3366b9f023 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-09session: lookup/rules table improvements and cleanupFlorin Coras1-155/+250
Change-Id: I5217364220023df34d5bee071cb750df1661b093 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-07session: fix v6 double bindsFlorin Coras1-4/+4
Change-Id: Ie747b490901254e962cf61814491851b891129ee Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-06session: add rule tagsFlorin Coras1-60/+98
Change-Id: Id5ebb410f509ac4c83d60e48efd54e00035e5ce6 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-05session: add api to dump rulesFlorin Coras1-9/+38
Change-Id: Ie42fd77e75e86a45cfe5951768c4638f27fdc3aa Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-03session: support drop action in rules tableFlorin Coras1-28/+38
Change-Id: Ided2980373ed5329c68f958f61be893428bccd31 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-11-01session: add support for proxying appsFlorin Coras1-11/+29
To enable this, applications set the proxy flag in their attach requests and pass the transport protocols they want to act as proxies for as part of the attach options. When proxy is enabled, session rules that point incoming packets to the proxy app are addedd to the local and global session tables, if these scopes are accessible to the app. In particular, in case of the former, the rule accepts packets from all sources and all ports destined to the namespace's supporting interface address on any port. While in case of the latter, a generic any destination and any port rule is addedd. Change-Id: I791f8c1cc083350f02e26a2ac3bdbbfbfa19ece3 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-28session: rules tablesFlorin Coras1-8/+362
This introduces 5-tuple lookup tables that may be used to implement custom session layer actions at connection establishment time (session layer perspective). The rules table build mask-match-action lookup trees that for a given 5-tuple key return the action for the first longest match. If rules overlap, ordering is established by tuple longest match with the following descending priority: remote ip, local ip, remote port, local port. At this time, the only match action supported is to forward packets to the application identified by the action. Change-Id: Icbade6fac720fa3979820d50cd7d6137f8b635c3 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-16udp: refactor udp codeFlorin Coras1-29/+67
Change-Id: I44d5c9df7c49b8d4d5677c6d319033b2da3e6b80 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-10-10session: add support for application namespacingFlorin Coras1-226/+633
Applications are now provided the option to select the namespace they are to be attached to and the scope of their attachement. Application namespaces are meant to: 1) constrain the scope of communication through the network by association with source interfaces and/or fib tables that provide the source ips to be used and limit the scope of routing 2) provide a namespace local scope to session layer communication, as opposed to the global scope provided by 1). That is, sessions can be established without assistance from transport and network layers. Albeit, zero/local-host ip addresses must still be provided in session establishment messages due to existing application idiosyncrasies. This mode of communication uses shared-memory fifos (cut-through sessions) exclusively. If applications request no namespace, they are assigned to the default one, which at its turn uses the default fib. Applications can request access to both local and global scopes for a namespace. If no scope is specified, session layer defaults to the global one. When a sw_if_index is provided for a namespace, zero-ip (INADDR_ANY) binds are converted to binds to the requested interface. Change-Id: Ia0f660bbf7eec7f89673f75b4821fc7c3d58e3d1 Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-09-18Fixes for issues Coverity has reported (VPP-972)Chris Luke1-4/+4
177117: fstat() returns -1 on error; the code is checking for any positive value instead 175142: final return could never be reached; simple refactoring 175235,175236: Warning suppressed with an explicit cast to (void) 174817: Final return couldn't be reached; is is_in_order is 0 then 'rv' is already returned above 172095,172093: If is_is_set does not get set to 1, then return 0 has already been invoked 174405: Re-kill this (nothing sets rv) 171136: Looks like a cmd line flag to set test_bytes was missing; added it, and refactored the argc/argv processing to avoid two other potential segv's 176813: Add range checking for term width/height. First stab at a reasonable range is 1-512 for both. 175350: Fix implicit casting in shift operation 174272: Not a c+p error; try using a coverity annotation to ignore it 174273,175320: Annotated FORWARD_NULL Change-Id: I58d0f860fc2209f59f8d1b6b344d631b8d429ace Signed-off-by: Chris Luke <chrisy@flirble.org>
2017-08-16tcp: fix v6 sessionsroot1-4/+4
Change-Id: Ia6dd5e948b17b2f3866fe70838eabb09e35415e1 Signed-off-by: Dave Barach <dbarach@cisco.com> Signed-off-by: Florin Coras <fcoras@cisco.com>
2017-08-02Fix tcp tx buffer allocationFlorin Coras1-9/+31
- Make tcp output buffer allocation macro an inline function - Use per ip version per thread tx frames for retransmits and timer events - Fix / parameterize tcp data structure preallocation - Add a couple of gdb-callable show commands - Fix local endpoint cleanup Change-Id: I67b47b7570aa14cb4634b6fd93c57cd2eacbfa29 Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Dave Barach <dave@barachs.net>
2017-07-30Make tcp active open data structures thread safeFlorin Coras1-63/+40
- Cleanup half-open connections and timers on the right thread - Ensure half-open connection and transport endpoint pools are thread safe - Enqueue TX events to the correct vpp thread in the builtin client - Use transport proto in transport connections instead of session type Change-Id: Id13239a206afbff6f34a38afa510fe014e4b2049 Signed-off-by: Florin Coras <fcoras@cisco.com> Signed-off-by: Dave Barach <dave@barachs.net>
2017-07-25Cleanup/refactor session layer codeFlorin Coras1-0/+620
Change-Id: Ica99e8cb919fca6b069c37c969d60e8ccc2c6bf9 Signed-off-by: Florin Coras <fcoras@cisco.com>
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/*
 * sr_localsid.c: ipv6 segment routing Endpoint behaviors
 *
 * Copyright (c) 2016 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 Processing of packets with a SRH
 *
 * CLI to define new Segment Routing End processing functions.
 * Graph node to support such functions.
 *
 * Each function associates an SRv6 segment (IPv6 address) with an specific
 * Segment Routing function.
 *
 */

#include <vlib/vlib.h>
#include <vnet/vnet.h>
#include <vnet/srv6/sr.h>
#include <vnet/ip/ip.h>
#include <vnet/srv6/sr_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/fib/ip6_fib.h>
#include <vnet/dpo/dpo.h>
#include <vnet/adj/adj.h>

#include <vppinfra/error.h>
#include <vppinfra/elog.h>

/**
 * @brief Dynamically added SR localsid DPO type
 */
static dpo_type_t sr_localsid_dpo_type;
static dpo_type_t sr_localsid_d_dpo_type;

/**
 * @brief SR localsid add/del
 *
 * Function to add or delete SR LocalSIDs.
 *
 * @param is_del Boolean of whether its a delete instruction
 * @param localsid_addr IPv6 address of the localsid
 * @param is_decap Boolean of whether decapsulation is allowed in this function
 * @param behavior Type of behavior (function) for this localsid
 * @param sw_if_index Only for L2/L3 xconnect. OIF. In VRF variant the fib_table.
 * @param vlan_index Only for L2 xconnect. Outgoing VLAN tag.
 * @param fib_table  FIB table in which we should install the localsid entry
 * @param nh_addr Next Hop IPv4/IPv6 address. Only for L2/L3 xconnect.
 *
 * @return 0 on success, error otherwise.
 */
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)
{
  ip6_sr_main_t *sm = &sr_main;
  uword *p;
  int rv;

  ip6_sr_localsid_t *ls = 0;

  dpo_id_t dpo = DPO_INVALID;

  /* Search for the item */
  p = mhash_get (&sm->sr_localsids_index_hash, localsid_addr);

  if (p)
    {
      if (is_del)
	{
	  /* Retrieve localsid */
	  ls = pool_elt_at_index (sm->localsids, p[0]);
	  /* Delete FIB entry */
	  fib_prefix_t pfx = {
	    .fp_proto = FIB_PROTOCOL_IP6,
	    .fp_len = 128,
	    .fp_addr = {
			.ip6 = *localsid_addr,
			}
	  };

	  fib_table_entry_delete (fib_table_find (FIB_PROTOCOL_IP6,
						  fib_table),
				  &pfx, FIB_SOURCE_SR);

	  /* In case it is a Xconnect iface remove the (OIF, NHOP) adj */
	  if (ls->behavior == SR_BEHAVIOR_X || ls->behavior == SR_BEHAVIOR_DX6
	      || ls->behavior == SR_BEHAVIOR_DX4)
	    adj_unlock (ls->nh_adj);

	  if (ls->behavior >= SR_BEHAVIOR_LAST)
	    {
	      sr_localsid_fn_registration_t *plugin = 0;
	      plugin = pool_elt_at_index (sm->plugin_functions,
					  ls->behavior - SR_BEHAVIOR_LAST);

	      /* Callback plugin removal function */
	      rv = plugin->removal (ls);
	    }

	  /* Delete localsid registry */
	  pool_put (sm->localsids, ls);
	  mhash_unset (&sm->sr_localsids_index_hash, localsid_addr, NULL);
	  return 0;
	}
      else			/* create with function already existing; complain */
	return -1;
    }
  else
    /* delete; localsid does not exist; complain */
  if (is_del)
    return -2;

  /* Check whether there exists a FIB entry with such address */
  fib_prefix_t pfx = {
    .fp_proto = FIB_PROTOCOL_IP6,
    .fp_len = 128,
  };

  pfx.fp_addr.as_u64[0] = localsid_addr->as_u64[0];
  pfx.fp_addr.as_u64[1] = localsid_addr->as_u64[1];

  /* Lookup the FIB index associated to the table id provided */
  u32 fib_index = fib_table_find (FIB_PROTOCOL_IP6, fib_table);
  if (fib_index == ~0)
    return -3;

  /* Lookup the localsid in such FIB table */
  fib_node_index_t fei = fib_table_lookup_exact_match (fib_index, &pfx);
  if (FIB_NODE_INDEX_INVALID != fei)
    return -4;			//There is an entry for such address (the localsid addr)

  /* Create a new localsid registry */
  pool_get (sm->localsids, ls);
  memset (ls, 0, sizeof (*ls));

  clib_memcpy (&ls->localsid, localsid_addr, sizeof (ip6_address_t));
  ls->end_psp = end_psp;
  ls->behavior = behavior;
  ls->nh_adj = (u32) ~ 0;
  ls->fib_table = fib_table;
  switch (behavior)
    {
    case SR_BEHAVIOR_END:
      break;
    case SR_BEHAVIOR_X:
      ls->sw_if_index = sw_if_index;
      clib_memcpy (&ls->next_hop.ip6, &nh_addr->ip6, sizeof (ip6_address_t));
      break;
    case SR_BEHAVIOR_T:
      ls->vrf_index = fib_table_find (FIB_PROTOCOL_IP6, sw_if_index);
      break;
    case SR_BEHAVIOR_DX4:
      ls->sw_if_index = sw_if_index;
      clib_memcpy (&ls->next_hop.ip4, &nh_addr->ip4, sizeof (ip4_address_t));
      break;
    case SR_BEHAVIOR_DX6:
      ls->sw_if_index = sw_if_index;
      clib_memcpy (&ls->next_hop.ip6, &nh_addr->ip6, sizeof (ip6_address_t));
      break;
    case SR_BEHAVIOR_DT6:
      ls->vrf_index = fib_table_find (FIB_PROTOCOL_IP6, sw_if_index);
      break;
    case SR_BEHAVIOR_DT4:
      ls->vrf_index = fib_table_find (FIB_PROTOCOL_IP4, sw_if_index);
      break;
    case SR_BEHAVIOR_DX2:
      ls->sw_if_index = sw_if_index;
      ls->vlan_index = vlan_index;
      break;
    }

  /* Figure out the adjacency magic for Xconnect variants */
  if (ls->behavior == SR_BEHAVIOR_X || ls->behavior == SR_BEHAVIOR_DX4
      || ls->behavior == SR_BEHAVIOR_DX6)
    {
      adj_index_t nh_adj_index = ADJ_INDEX_INVALID;

      /* Retrieve the adjacency corresponding to the (OIF, next_hop) */
      if (ls->behavior == SR_BEHAVIOR_DX6 || ls->behavior == SR_BEHAVIOR_X)
	nh_adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP6, VNET_LINK_IP6,
					    nh_addr, sw_if_index);

      else if (ls->behavior == SR_BEHAVIOR_DX4)
	nh_adj_index = adj_nbr_add_or_lock (FIB_PROTOCOL_IP4, VNET_LINK_IP4,
					    nh_addr, sw_if_index);

      /* Check for ADJ creation error. If so panic */
      if (nh_adj_index == ADJ_INDEX_INVALID)
	{
	  pool_put (sm->localsids, ls);
	  return -5;
	}

      ls->nh_adj = nh_adj_index;
    }

  /* Set DPO */
  if (ls->behavior == SR_BEHAVIOR_END || ls->behavior == SR_BEHAVIOR_X)
    dpo_set (&dpo, sr_localsid_dpo_type, DPO_PROTO_IP6, ls - sm->localsids);
  else if (ls->behavior > SR_BEHAVIOR_D_FIRST
	   && ls->behavior < SR_BEHAVIOR_LAST)
    dpo_set (&dpo, sr_localsid_d_dpo_type, DPO_PROTO_IP6, ls - sm->localsids);
  else if (ls->behavior >= SR_BEHAVIOR_LAST)
    {
      sr_localsid_fn_registration_t *plugin = 0;
      plugin = pool_elt_at_index (sm->plugin_functions,
				  ls->behavior - SR_BEHAVIOR_LAST);
      /* Copy the unformat memory result */
      ls->plugin_mem = ls_plugin_mem;
      /* Callback plugin creation function */
      rv = plugin->creation (ls);
      if (rv)
	{
	  pool_put (sm->localsids, ls);
	  return -6;
	}
      dpo_set (&dpo, plugin->dpo, DPO_PROTO_IP6, ls - sm->localsids);
    }

  /* Set hash key for searching localsid by address */
  mhash_set (&sm->sr_localsids_index_hash, localsid_addr, ls - sm->localsids,
	     NULL);

  fib_table_entry_special_dpo_add (fib_index, &pfx, FIB_SOURCE_SR,
				   FIB_ENTRY_FLAG_EXCLUSIVE, &dpo);
  dpo_reset (&dpo);

  /* Set counter to zero */
  vlib_validate_combined_counter (&(sm->sr_ls_valid_counters),
				  ls - sm->localsids);
  vlib_validate_combined_counter (&(sm->sr_ls_invalid_counters),
				  ls - sm->localsids);

  vlib_zero_combined_counter (&(sm->sr_ls_valid_counters),
			      ls - sm->localsids);
  vlib_zero_combined_counter (&(sm->sr_ls_invalid_counters),
			      ls - sm->localsids);

  return 0;
}

/**
 * @brief SR LocalSID CLI function.
 *
 * @see sr_cli_localsid
 */
static clib_error_t *
sr_cli_localsid_command_fn (vlib_main_t * vm, unformat_input_t * input,
			    vlib_cli_command_t * cmd)
{
  vnet_main_t *vnm = vnet_get_main ();
  ip6_sr_main_t *sm = &sr_main;
  u32 sw_if_index = (u32) ~ 0, vlan_index = (u32) ~ 0, fib_index = 0;
  int is_del = 0;
  int end_psp = 0;
  ip6_address_t resulting_address;
  ip46_address_t next_hop;
  char address_set = 0;
  char behavior = 0;
  void *ls_plugin_mem = 0;

  int rv;

  memset (&resulting_address, 0, sizeof (ip6_address_t));
  ip46_address_reset (&next_hop);

  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
    {
      if (unformat (input, "del"))
	is_del = 1;
      else if (!address_set
	       && unformat (input, "address %U", unformat_ip6_address,
			    &resulting_address))
	address_set = 1;
      else if (!address_set
	       && unformat (input, "addr %U", unformat_ip6_address,
			    &resulting_address))
	address_set = 1;
      else if (unformat (input, "fib-table %u", &fib_index));
      else if (vlan_index == (u32) ~ 0
	       && unformat (input, "vlan %u", &vlan_index));
      else if (!behavior && unformat (input, "behavior"))
	{
	  if (unformat (input, "end.x %U %U",
			unformat_vnet_sw_interface, vnm, &sw_if_index,
			unformat_ip6_address, &next_hop.ip6))
	    behavior = SR_BEHAVIOR_X;
	  else if (unformat (input, "end.t %u", &sw_if_index))
	    behavior = SR_BEHAVIOR_T;
	  else if (unformat (input, "end.dx6 %U %U",
			     unformat_vnet_sw_interface, vnm, &sw_if_index,
			     unformat_ip6_address, &next_hop.ip6))
	    behavior = SR_BEHAVIOR_DX6;
	  else if (unformat (input, "end.dx4 %U %U",
			     unformat_vnet_sw_interface, vnm, &sw_if_index,
			     unformat_ip4_address, &next_hop.ip4))
	    behavior = SR_BEHAVIOR_DX4;
	  else if (unformat (input, "end.dx2 %U",
			     unformat_vnet_sw_interface, vnm, &sw_if_index))
	    behavior = SR_BEHAVIOR_DX2;
	  else if (unformat (input, "end.dt6 %u", &sw_if_index))
	    behavior = SR_BEHAVIOR_DT6;
	  else if (unformat (input, "end.dt4 %u", &sw_if_index))
	    behavior = SR_BEHAVIOR_DT4;
	  else
	    {
	      /* Loop over all the plugin behavior format functions */
	      sr_localsid_fn_registration_t *plugin = 0, **vec_plugins = 0;
	      sr_localsid_fn_registration_t **plugin_it = 0;

	      /* Create a vector out of the plugin pool as recommended */
        /* *INDENT-OFF* */
        pool_foreach (plugin, sm->plugin_functions,
        {
          vec_add1 (vec_plugins, plugin);
        });
        /* *INDENT-ON* */

	      vec_foreach (plugin_it, vec_plugins)
	      {
		if (unformat
		    (input, "%U", (*plugin_it)->ls_unformat, &ls_plugin_mem))
		  {
		    behavior = (*plugin_it)->sr_localsid_function_number;
		    break;
		  }
	      }
	    }

	  if (!behavior)
	    {
	      if (unformat (input, "end"))
		behavior = SR_BEHAVIOR_END;
	      else
		break;
	    }
	}
      else if (!end_psp && unformat (input, "psp"))
	end_psp = 1;
      else
	break;
    }

  if (!behavior && end_psp)
    behavior = SR_BEHAVIOR_END;

  if (!address_set)
    return clib_error_return (0,
			      "Error: SRv6 LocalSID address is mandatory.");
  if (!is_del && !behavior)
    return clib_error_return (0,
			      "Error: SRv6 LocalSID behavior is mandatory.");
  if (vlan_index != (u32) ~ 0)
    return clib_error_return (0,
			      "Error: SRv6 End.DX2 with rewrite VLAN tag not supported by now.");
  if (end_psp && !(behavior == SR_BEHAVIOR_END || behavior == SR_BEHAVIOR_X))
    return clib_error_return (0,
			      "Error: SRv6 PSP only compatible with End and End.X");

  rv = sr_cli_localsid (is_del, &resulting_address, end_psp, behavior,
			sw_if_index, vlan_index, fib_index, &next_hop,
			ls_plugin_mem);

  switch (rv)
    {
    case 0:
      break;
    case 1:
      return 0;
    case -1:
      return clib_error_return (0,
				"Identical localsid already exists. Requested localsid not created.");
    case -2:
      return clib_error_return (0,
				"The requested localsid could not be deleted. SR localsid not found");
    case -3:
      return clib_error_return (0, "FIB table %u does not exist", fib_index);
    case -4:
      return clib_error_return (0, "There is already one FIB entry for the"
				"requested localsid non segment routing related");
    case -5:
      return clib_error_return (0,
				"Could not create ARP/ND entry for such next_hop. Internal error.");
    case -6:
      return clib_error_return (0,
				"Error on the plugin based localsid creation.");
    default:
      return clib_error_return (0, "BUG: sr localsid returns %d", rv);
    }
  return 0;
}

/* *INDENT-OFF* */
VLIB_CLI_COMMAND (sr_localsid_command, static) = {
  .path = "sr localsid",
  .short_help = "sr localsid (del) address XX:XX::YY:YY"
      "(fib-table 8) behavior STRING",
  .long_help =
    "Create SR LocalSID and binds it to a particular behavior\n"
    "Arguments:\n"
    "\tlocalSID IPv6_addr(128b)   LocalSID IPv6 address\n"
    "\t(fib-table X)              Optional. VRF where to install SRv6 localsid\n"
    "\tbehavior STRING            Specifies the behavior\n"
    "\n\tBehaviors:\n"
    "\tEnd\t-> Endpoint.\n"
    "\tEnd.X\t-> Endpoint with decapsulation and Layer-3 cross-connect.\n"
    "\t\tParameters: '<iface> <ip6_next_hop>'\n"
    "\tEnd.DX2\t-> Endpoint with decapsulation and Layer-2 cross-connect.\n"
    "\t\tParameters: '<iface>'\n"
    "\tEnd.DX6\t-> Endpoint with decapsulation and IPv6 cross-connect.\n"
    "\t\tParameters: '<iface> <ip6_next_hop>'\n"
    "\tEnd.DX4\t-> Endpoint with decapsulation and IPv4 cross-connect.\n"
    "\t\tParameters: '<iface> <ip4_next_hop>'\n"
    "\tEnd.DT6\t-> Endpoint with decapsulation and specific IPv6 table lookup.\n"
    "\t\tParameters: '<ip6_fib_table>'\n"
    "\tEnd.DT4\t-> Endpoint with decapsulation and specific IPv4 table lookup.\n"
    "\t\tParameters: '<ip4_fib_table>'\n",
  .function = sr_cli_localsid_command_fn,
};
/* *INDENT-ON* */

/**
 * @brief CLI function to 'show' all SR LocalSIDs on console.
 */
static clib_error_t *
show_sr_localsid_command_fn (vlib_main_t * vm, unformat_input_t * input,
			     vlib_cli_command_t * cmd)
{
  vnet_main_t *vnm = vnet_get_main ();
  ip6_sr_main_t *sm = &sr_main;
  ip6_sr_localsid_t **localsid_list = 0;
  ip6_sr_localsid_t *ls;
  int i;

  vlib_cli_output (vm, "SRv6 - My LocalSID Table:");
  vlib_cli_output (vm, "=========================");
  /* *INDENT-OFF* */
  pool_foreach (ls, sm->localsids, ({ vec_add1 (localsid_list, ls); }));
  /* *INDENT-ON* */
  for (i = 0; i < vec_len (localsid_list); i++)
    {
      ls = localsid_list[i];
      switch (ls->behavior)
	{
	case SR_BEHAVIOR_END:
	  vlib_cli_output (vm, "\tAddress: \t%U\n\tBehavior: \tEnd",
			   format_ip6_address, &ls->localsid);
	  break;
	case SR_BEHAVIOR_X:
	  vlib_cli_output (vm,
			   "\tAddress: \t%U\n\tBehavior: \tX (Endpoint with Layer-3 cross-connect)"
			   "\n\tIface:  \t%U\n\tNext hop: \t%U",
			   format_ip6_address, &ls->localsid,
			   format_vnet_sw_if_index_name, vnm, ls->sw_if_index,
			   format_ip6_address, &ls->next_hop.ip6);
	  break;
	case SR_BEHAVIOR_T:
	  vlib_cli_output (vm,
			   "\tAddress: \t%U\n\tBehavior: \tT (Endpoint with specific IPv6 table lookup)"
			   "\n\tTable:  \t%u",
			   format_ip6_address, &ls->localsid, ls->vrf_index);
	  break;
	case SR_BEHAVIOR_DX4:
	  vlib_cli_output (vm,
			   "\tAddress: \t%U\n\tBehavior: \tDX4 (Endpoint with decapsulation and IPv4 cross-connect)"
			   "\n\tIface:  \t%U\n\tNext hop: \t%U",
			   format_ip6_address, &ls->localsid,
			   format_vnet_sw_if_index_name, vnm, ls->sw_if_index,
			   format_ip4_address, &ls->next_hop.ip4);
	  break;
	case SR_BEHAVIOR_DX6:
	  vlib_cli_output (vm,
			   "\tAddress: \t%U\n\tBehavior: \tDX6 (Endpoint with decapsulation and IPv6 cross-connect)"
			   "\n\tIface:  \t%U\n\tNext hop: \t%U",
			   format_ip6_address, &ls->localsid,
			   format_vnet_sw_if_index_name, vnm, ls->sw_if_index,
			   format_ip6_address, &ls->next_hop.ip6);
	  break;
	case SR_BEHAVIOR_DX2:
	  if (ls->vlan_index == (u32) ~ 0)
	    vlib_cli_output (vm,
			     "\tAddress: \t%U\n\tBehavior: \tDX2 (Endpoint with decapulation and Layer-2 cross-connect)"
			     "\n\tIface:  \t%U", format_ip6_address,
			     &ls->localsid, format_vnet_sw_if_index_name, vnm,
			     ls->sw_if_index);
	  else
	    vlib_cli_output (vm,
			     "Unsupported yet. (DX2 with egress VLAN rewrite)");
	  break;
	case SR_BEHAVIOR_DT6:
	  vlib_cli_output (vm,
			   "\tAddress: \t%U\n\tBehavior: \tDT6 (Endpoint with decapsulation and specific IPv6 table lookup)"
			   "\n\tTable: %u", format_ip6_address, &ls->localsid,
			   ls->vrf_index);
	  break;
	case SR_BEHAVIOR_DT4:
	  vlib_cli_output (vm,
			   "\tAddress: \t%U\n\tBehavior: \tDT4 (Endpoint with decapsulation and specific IPv4 table lookup)"
			   "\n\tTable: \t%u", format_ip6_address,
			   &ls->localsid, ls->vrf_index);
	  break;
	default:
	  if (ls->behavior >= SR_BEHAVIOR_LAST)
	    {
	      sr_localsid_fn_registration_t *plugin =
		pool_elt_at_index (sm->plugin_functions,
				   ls->behavior - SR_BEHAVIOR_LAST);

	      vlib_cli_output (vm, "\tAddress: \t%U\n"
			       "\tBehavior: \t%s (%s)\n\t%U",
			       format_ip6_address, &ls->localsid,
			       plugin->keyword_str, plugin->def_str,
			       plugin->ls_format, ls->plugin_mem);
	    }
	  else
	    //Should never get here...
	    vlib_cli_output (vm, "Internal error");
	  break;
	}
      if (ls->end_psp)
	vlib_cli_output (vm, "\tPSP: \tTrue\n");

      /* Print counters */
      vlib_counter_t valid, invalid;
      vlib_get_combined_counter (&(sm->sr_ls_valid_counters), i, &valid);
      vlib_get_combined_counter (&(sm->sr_ls_invalid_counters), i, &invalid);
      vlib_cli_output (vm, "\tGood traffic: \t[%Ld packets : %Ld bytes]\n",
		       valid.packets, valid.bytes);
      vlib_cli_output (vm, "\tBad traffic:  \t[%Ld packets : %Ld bytes]\n",
		       invalid.packets, invalid.bytes);
      vlib_cli_output (vm, "--------------------");
    }
  return 0;
}

/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_sr_localsid_command, static) = {
  .path = "show sr localsids",
  .short_help = "show sr localsids",
  .function = show_sr_localsid_command_fn,
};
/* *INDENT-ON* */

/**
 * @brief Function to 'clear' ALL SR localsid counters
 */
static clib_error_t *
clear_sr_localsid_counters_command_fn (vlib_main_t * vm,
				       unformat_input_t * input,
				       vlib_cli_command_t * cmd)
{
  ip6_sr_main_t *sm = &sr_main;

  vlib_clear_combined_counters (&(sm->sr_ls_valid_counters));
  vlib_clear_combined_counters (&(sm->sr_ls_invalid_counters));

  return 0;
}

/* *INDENT-OFF* */
VLIB_CLI_COMMAND (clear_sr_localsid_counters_command, static) = {
  .path = "clear sr localsid-counters",
  .short_help = "clear sr localsid-counters",
  .function = clear_sr_localsid_counters_command_fn,
};
/* *INDENT-ON* */

/************************ SR LocalSID graphs node ****************************/
/**
 * @brief SR localsid node trace
 */
typedef struct
{
  ip6_address_t localsid;
  u16 behavior;
  u8 sr[256];
  u8 num_segments;
  u8 segments_left;
} sr_localsid_trace_t;

#define foreach_sr_localsid_error                                   \
_(NO_INNER_HEADER, "(SR-Error) No inner IP header")                 \
_(NO_MORE_SEGMENTS, "(SR-Error) No more segments")                  \
_(NO_SRH, "(SR-Error) No SR header")                                \
_(NO_PSP, "(SR-Error) PSP Not available (segments left > 0)")       \
_(NOT_LS, "(SR-Error) Decaps not available (segments left > 0)")    \
_(L2, "(SR-Error) SRv6 decapsulated a L2 frame without dest")

typedef enum
{
#define _(sym,str) SR_LOCALSID_ERROR_##sym,
  foreach_sr_localsid_error
#undef _
    SR_LOCALSID_N_ERROR,
} sr_localsid_error_t;

static char *sr_localsid_error_strings[] = {
#define _(sym,string) string,
  foreach_sr_localsid_error
#undef _
};

#define foreach_sr_localsid_next        \
_(ERROR, "error-drop")                  \
_(IP6_LOOKUP, "ip6-lookup")             \
_(IP4_LOOKUP, "ip4-lookup")             \
_(IP6_REWRITE, "ip6-rewrite")           \
_(IP4_REWRITE, "ip4-rewrite")           \
_(INTERFACE_OUTPUT, "interface-output")

typedef enum
{
#define _(s,n) SR_LOCALSID_NEXT_##s,
  foreach_sr_localsid_next
#undef _
    SR_LOCALSID_N_NEXT,
} sr_localsid_next_t;

/**
 * @brief SR LocalSID graph node trace function
 *
 * @see sr_localsid
 */
u8 *
format_sr_localsid_trace (u8 * s, va_list * args)
{
  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
  sr_localsid_trace_t *t = va_arg (*args, sr_localsid_trace_t *);

  s =
    format (s, "SR-LOCALSID:\n\tLocalsid: %U\n", format_ip6_address,
	    &t->localsid);
  switch (t->behavior)
    {
    case SR_BEHAVIOR_END:
      s = format (s, "\tBehavior: End\n");
      break;
    case SR_BEHAVIOR_DX6:
      s = format (s, "\tBehavior: Decapsulation with IPv6 L3 xconnect\n");
      break;
    case SR_BEHAVIOR_DX4:
      s = format (s, "\tBehavior: Decapsulation with IPv4 L3 xconnect\n");
      break;
    case SR_BEHAVIOR_X:
      s = format (s, "\tBehavior: IPv6 L3 xconnect\n");
      break;
    case SR_BEHAVIOR_T:
      s = format (s, "\tBehavior: IPv6 specific table lookup\n");
      break;
    case SR_BEHAVIOR_DT6:
      s = format (s, "\tBehavior: Decapsulation with IPv6 Table lookup\n");
      break;
    case SR_BEHAVIOR_DT4:
      s = format (s, "\tBehavior: Decapsulation with IPv4 Table lookup\n");
      break;
    case SR_BEHAVIOR_DX2:
      s = format (s, "\tBehavior: Decapsulation with L2 xconnect\n");
      break;
    default:
      s = format (s, "\tBehavior: defined in plugin\n");	//TODO
      break;
    }
  if (t->num_segments != 0xFF)
    {
      if (t->num_segments > 0)
	{
	  s = format (s, "\tSegments left: %d\n", t->segments_left);
	  s = format (s, "\tSID list: [in ietf order]");
	  int i = 0;
	  for (i = 0; i < t->num_segments; i++)
	    {
	      s = format (s, "\n\t-> %U", format_ip6_address,
			  (ip6_address_t *) & t->sr[i *
						    sizeof (ip6_address_t)]);
	    }
	}
    }
  return s;
}

/**
 * @brief Function doing End processing.
 */
static_always_inline void
end_srh_processing (vlib_node_runtime_t * node,
		    vlib_buffer_t * b0,
		    ip6_header_t * ip0,
		    ip6_sr_header_t * sr0,
		    ip6_sr_localsid_t * ls0,
		    u32 * next0, u8 psp, ip6_ext_header_t * prev0)
{
  ip6_address_t *new_dst0;

  if (PREDICT_TRUE (sr0->type == ROUTING_HEADER_TYPE_SR))
    {
      if (sr0->segments_left == 1 && psp)
	{
	  u32 new_l0, sr_len;
	  u64 *copy_dst0, *copy_src0;
	  u32 copy_len_u64s0 = 0;

	  ip0->dst_address.as_u64[0] = sr0->segments->as_u64[0];
	  ip0->dst_address.as_u64[1] = sr0->segments->as_u64[1];

	  /* Remove the SRH taking care of the rest of IPv6 ext header */
	  if (prev0)
	    prev0->next_hdr = sr0->protocol;
	  else
	    ip0->protocol = sr0->protocol;

	  sr_len = ip6_ext_header_len (sr0);
	  vlib_buffer_advance (b0, sr_len);
	  new_l0 = clib_net_to_host_u16 (ip0->payload_length) - sr_len;
	  ip0->payload_length = clib_host_to_net_u16 (new_l0);
	  copy_src0 = (u64 *) ip0;
	  copy_dst0 = copy_src0 + (sr0->length + 1);
	  /* number of 8 octet units to copy
	   * By default in absence of extension headers it is equal to length of ip6 header
	   * With extension headers it number of 8 octet units of ext headers preceding
	   * SR header
	   */
	  copy_len_u64s0 =
	    (((u8 *) sr0 - (u8 *) ip0) - sizeof (ip6_header_t)) >> 3;
	  copy_dst0[4 + copy_len_u64s0] = copy_src0[4 + copy_len_u64s0];
	  copy_dst0[3 + copy_len_u64s0] = copy_src0[3 + copy_len_u64s0];
	  copy_dst0[2 + copy_len_u64s0] = copy_src0[2 + copy_len_u64s0];
	  copy_dst0[1 + copy_len_u64s0] = copy_src0[1 + copy_len_u64s0];
	  copy_dst0[0 + copy_len_u64s0] = copy_src0[0 + copy_len_u64s0];

	  int i;
	  for (i = copy_len_u64s0 - 1; i >= 0; i--)
	    {
	      copy_dst0[i] = copy_src0[i];
	    }

	  if (ls0->behavior == SR_BEHAVIOR_X)
	    {
	      vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
	      *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
	    }
	  else if (ls0->behavior == SR_BEHAVIOR_T)
	    {
	      vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
	    }
	}
      else if (PREDICT_TRUE (sr0->segments_left > 0))
	{
	  sr0->segments_left -= 1;
	  new_dst0 = (ip6_address_t *) (sr0->segments);
	  new_dst0 += sr0->segments_left;
	  ip0->dst_address.as_u64[0] = new_dst0->as_u64[0];
	  ip0->dst_address.as_u64[1] = new_dst0->as_u64[1];

	  if (ls0->behavior == SR_BEHAVIOR_X)
	    {
	      vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
	      *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
	    }
	  else if (ls0->behavior == SR_BEHAVIOR_T)
	    {
	      vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
	    }
	}
      else
	{
	  *next0 = SR_LOCALSID_NEXT_ERROR;
	  b0->error = node->errors[SR_LOCALSID_ERROR_NO_MORE_SEGMENTS];
	}
    }
  else
    {
      /* Error. Routing header of type != SR */
      *next0 = SR_LOCALSID_NEXT_ERROR;
      b0->error = node->errors[SR_LOCALSID_ERROR_NO_SRH];
    }
}

/*
 * @brief Function doing SRH processing for D* variants
 */
static_always_inline void
end_decaps_srh_processing (vlib_node_runtime_t * node,
			   vlib_buffer_t * b0,
			   ip6_header_t * ip0,
			   ip6_sr_header_t * sr0,
			   ip6_sr_localsid_t * ls0, u32 * next0)
{
  /* Compute the size of the IPv6 header with all Ext. headers */
  u8 next_proto;
  ip6_ext_header_t *next_ext_header;
  u16 total_size = 0;

  next_proto = ip0->protocol;
  next_ext_header = (void *) (ip0 + 1);
  total_size = sizeof (ip6_header_t);
  while (ip6_ext_hdr (next_proto))
    {
      total_size += ip6_ext_header_len (next_ext_header);
      next_proto = next_ext_header->next_hdr;
      next_ext_header = ip6_ext_next_header (next_ext_header);
    }

  /* Ensure this is the last segment. Otherwise drop. */
  if (sr0 && sr0->segments_left != 0)
    {
      *next0 = SR_LOCALSID_NEXT_ERROR;
      b0->error = node->errors[SR_LOCALSID_ERROR_NOT_LS];
      return;
    }

  switch (next_proto)
    {
    case IP_PROTOCOL_IPV6:
      /* Encap-End IPv6. Pop outer IPv6 header. */
      if (ls0->behavior == SR_BEHAVIOR_DX6)
	{
	  vlib_buffer_advance (b0, total_size);
	  vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
	  *next0 = SR_LOCALSID_NEXT_IP6_REWRITE;
	  return;
	}
      else if (ls0->behavior == SR_BEHAVIOR_DT6)
	{
	  vlib_buffer_advance (b0, total_size);
	  vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
	  return;
	}
      break;
    case IP_PROTOCOL_IP_IN_IP:
      /* Encap-End IPv4. Pop outer IPv6 header */
      if (ls0->behavior == SR_BEHAVIOR_DX4)
	{
	  vlib_buffer_advance (b0, total_size);
	  vnet_buffer (b0)->ip.adj_index[VLIB_TX] = ls0->nh_adj;
	  *next0 = SR_LOCALSID_NEXT_IP4_REWRITE;
	  return;
	}
      else if (ls0->behavior == SR_BEHAVIOR_DT4)
	{
	  vlib_buffer_advance (b0, total_size);
	  vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->vrf_index;
	  *next0 = SR_LOCALSID_NEXT_IP4_LOOKUP;
	  return;
	}
      break;
    case IP_PROTOCOL_IP6_NONXT:
      /* L2 encaps */
      if (ls0->behavior == SR_BEHAVIOR_DX2)
	{
	  vlib_buffer_advance (b0, total_size);
	  vnet_buffer (b0)->sw_if_index[VLIB_TX] = ls0->sw_if_index;
	  *next0 = SR_LOCALSID_NEXT_INTERFACE_OUTPUT;
	  return;
	}
      break;
    }
  *next0 = SR_LOCALSID_NEXT_ERROR;
  b0->error = node->errors[SR_LOCALSID_ERROR_NO_INNER_HEADER];
  return;
}

/**
 * @brief SR LocalSID graph node. Supports all default SR Endpoint variants with decaps
 */
static uword
sr_localsid_d_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
		  vlib_frame_t * from_frame)
{
  u32 n_left_from, next_index, *from, *to_next;
  ip6_sr_main_t *sm = &sr_main;
  from = vlib_frame_vector_args (from_frame);
  n_left_from = from_frame->n_vectors;
  next_index = node->cached_next_index;
  u32 thread_index = vm->thread_index;

  while (n_left_from > 0)
    {
      u32 n_left_to_next;
      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);

      /* Quad - Loop */
      while (n_left_from >= 8 && n_left_to_next >= 4)
	{
	  u32 bi0, bi1, bi2, bi3;
	  vlib_buffer_t *b0, *b1, *b2, *b3;
	  ip6_header_t *ip0, *ip1, *ip2, *ip3;
	  ip6_ext_header_t *prev0, *prev1, *prev2, *prev3;
	  ip6_sr_header_t *sr0, *sr1, *sr2, *sr3;
	  u32 next0, next1, next2, next3;
	  next0 = next1 = next2 = next3 = SR_LOCALSID_NEXT_IP6_LOOKUP;
	  ip6_sr_localsid_t *ls0, *ls1, *ls2, *ls3;

	  /* Prefetch next iteration. */
	  {
	    vlib_buffer_t *p4, *p5, *p6, *p7;

	    p4 = vlib_get_buffer (vm, from[4]);
	    p5 = vlib_get_buffer (vm, from[5]);
	    p6 = vlib_get_buffer (vm, from[6]);
	    p7 = vlib_get_buffer (vm, from[7]);

	    /* Prefetch the buffer header and packet for the N+4 loop iteration */
	    vlib_prefetch_buffer_header (p4, LOAD);
	    vlib_prefetch_buffer_header (p5, LOAD);
	    vlib_prefetch_buffer_header (p6, LOAD);
	    vlib_prefetch_buffer_header (p7, LOAD);

	    CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
	    CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
	    CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
	    CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
	  }

	  to_next[0] = bi0 = from[0];
	  to_next[1] = bi1 = from[1];
	  to_next[2] = bi2 = from[2];
	  to_next[3] = bi3 = from[3];
	  from += 4;
	  to_next += 4;
	  n_left_from -= 4;
	  n_left_to_next -= 4;

	  b0 = vlib_get_buffer (vm, bi0);
	  b1 = vlib_get_buffer (vm, bi1);
	  b2 = vlib_get_buffer (vm, bi2);
	  b3 = vlib_get_buffer (vm, bi3);

	  ls0 =
	    pool_elt_at_index (sm->localsids,
			       vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
	  ls1 =
	    pool_elt_at_index (sm->localsids,
			       vnet_buffer (b1)->ip.adj_index[VLIB_TX]);
	  ls2 =
	    pool_elt_at_index (sm->localsids,
			       vnet_buffer (b2)->ip.adj_index[VLIB_TX]);
	  ls3 =
	    pool_elt_at_index (sm->localsids,
			       vnet_buffer (b3)->ip.adj_index[VLIB_TX]);

	  ip0 = vlib_buffer_get_current (b0);
	  ip1 = vlib_buffer_get_current (b1);
	  ip2 = vlib_buffer_get_current (b2);
	  ip3 = vlib_buffer_get_current (b3);

	  ip6_ext_header_find_t (ip0, prev0, sr0, IP_PROTOCOL_IPV6_ROUTE);
	  ip6_ext_header_find_t (ip1, prev1, sr1, IP_PROTOCOL_IPV6_ROUTE);
	  ip6_ext_header_find_t (ip2, prev2, sr2, IP_PROTOCOL_IPV6_ROUTE);
	  ip6_ext_header_find_t (ip3, prev3, sr3, IP_PROTOCOL_IPV6_ROUTE);

	  end_decaps_srh_processing (node, b0, ip0, sr0, ls0, &next0);
	  end_decaps_srh_processing (node, b1, ip1, sr1, ls1, &next1);
	  end_decaps_srh_processing (node, b2, ip2, sr2, ls2, &next2);
	  end_decaps_srh_processing (node, b3, ip3, sr3, ls3, &next3);

	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      sr_localsid_trace_t *tr =
		vlib_add_trace (vm, node, b0, sizeof (*tr));
	      tr->num_segments = 0;
	      clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
			   sizeof (tr->localsid.as_u8));
	      tr->behavior = ls0->behavior;
	      if (ip0 == vlib_buffer_get_current (b0))
		{
		  if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
		      && sr0->type == ROUTING_HEADER_TYPE_SR)
		    {
		      clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
		      tr->num_segments =
			sr0->length * 8 / sizeof (ip6_address_t);
		      tr->segments_left = sr0->segments_left;
		    }
		}
	      else
		tr->num_segments = 0xFF;
	    }

	  if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      sr_localsid_trace_t *tr =
		vlib_add_trace (vm, node, b1, sizeof (*tr));
	      tr->num_segments = 0;
	      clib_memcpy (tr->localsid.as_u8, ls1->localsid.as_u8,
			   sizeof (tr->localsid.as_u8));
	      tr->behavior = ls1->behavior;
	      if (ip1 == vlib_buffer_get_current (b1))
		{
		  if (ip1->protocol == IP_PROTOCOL_IPV6_ROUTE
		      && sr1->type == ROUTING_HEADER_TYPE_SR)
		    {
		      clib_memcpy (tr->sr, sr1->segments, sr1->length * 8);
		      tr->num_segments =
			sr1->length * 8 / sizeof (ip6_address_t);
		      tr->segments_left = sr1->segments_left;
		    }
		}
	      else
		tr->num_segments = 0xFF;
	    }

	  if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      sr_localsid_trace_t *tr =
		vlib_add_trace (vm, node, b2, sizeof (*tr));
	      tr->num_segments = 0;
	      clib_memcpy (tr->localsid.as_u8, ls2->localsid.as_u8,
			   sizeof (tr->localsid.as_u8));
	      tr->behavior = ls2->behavior;
	      if (ip2 == vlib_buffer_get_current (b2))
		{
		  if (ip2->protocol == IP_PROTOCOL_IPV6_ROUTE
		      && sr2->type == ROUTING_HEADER_TYPE_SR)
		    {
		      clib_memcpy (tr->sr, sr2->segments, sr2->length * 8);
		      tr->num_segments =
			sr2->length * 8 / sizeof (ip6_address_t);
		      tr->segments_left = sr2->segments_left;
		    }
		}
	      else
		tr->num_segments = 0xFF;
	    }

	  if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      sr_localsid_trace_t *tr =
		vlib_add_trace (vm, node, b3, sizeof (*tr));
	      tr->num_segments = 0;
	      clib_memcpy (tr->localsid.as_u8, ls3->localsid.as_u8,
			   sizeof (tr->localsid.as_u8));
	      tr->behavior = ls3->behavior;
	      if (ip3 == vlib_buffer_get_current (b3))
		{
		  if (ip3->protocol == IP_PROTOCOL_IPV6_ROUTE
		      && sr3->type == ROUTING_HEADER_TYPE_SR)
		    {
		      clib_memcpy (tr->sr, sr3->segments, sr3->length * 8);
		      tr->num_segments =
			sr3->length * 8 / sizeof (ip6_address_t);
		      tr->segments_left = sr3->segments_left;
		    }
		}
	      else
		tr->num_segments = 0xFF;
	    }

	  vlib_increment_combined_counter
	    (((next0 ==
	       SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
	      &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
	     1, vlib_buffer_length_in_chain (vm, b0));

	  vlib_increment_combined_counter
	    (((next1 ==
	       SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
	      &(sm->sr_ls_valid_counters)), thread_index, ls1 - sm->localsids,
	     1, vlib_buffer_length_in_chain (vm, b1));

	  vlib_increment_combined_counter
	    (((next2 ==
	       SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
	      &(sm->sr_ls_valid_counters)), thread_index, ls2 - sm->localsids,
	     1, vlib_buffer_length_in_chain (vm, b2));

	  vlib_increment_combined_counter
	    (((next3 ==
	       SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
	      &(sm->sr_ls_valid_counters)), thread_index, ls3 - sm->localsids,
	     1, vlib_buffer_length_in_chain (vm, b3));

	  vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
					   n_left_to_next, bi0, bi1, bi2, bi3,
					   next0, next1, next2, next3);
	}

      /* Single loop for potentially the last three packets */
      while (n_left_from > 0 && n_left_to_next > 0)
	{
	  u32 bi0;
	  vlib_buffer_t *b0;
	  ip6_header_t *ip0;
	  ip6_ext_header_t *prev0;
	  ip6_sr_header_t *sr0;
	  u32 next0 = SR_LOCALSID_NEXT_IP6_LOOKUP;
	  ip6_sr_localsid_t *ls0;

	  bi0 = from[0];
	  to_next[0] = bi0;
	  from += 1;
	  to_next += 1;
	  n_left_from -= 1;
	  n_left_to_next -= 1;

	  b0 = vlib_get_buffer (vm, bi0);
	  ip0 = vlib_buffer_get_current (b0);

	  /* Lookup the SR End behavior based on IP DA (adj) */
	  ls0 =
	    pool_elt_at_index (sm->localsids,
			       vnet_buffer (b0)->ip.adj_index[VLIB_TX]);

	  /* Find SRH as well as previous header */
	  ip6_ext_header_find_t (ip0, prev0, sr0, IP_PROTOCOL_IPV6_ROUTE);

	  /* SRH processing and End variants */
	  end_decaps_srh_processing (node, b0, ip0, sr0, ls0, &next0);

	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      sr_localsid_trace_t *tr =
		vlib_add_trace (vm, node, b0, sizeof (*tr));
	      tr->num_segments = 0;
	      clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
			   sizeof (tr->localsid.as_u8));
	      tr->behavior = ls0->behavior;
	      if (ip0 == vlib_buffer_get_current (b0))
		{
		  if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
		      && sr0->type == ROUTING_HEADER_TYPE_SR)
		    {
		      clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
		      tr->num_segments =
			sr0->length * 8 / sizeof (ip6_address_t);
		      tr->segments_left = sr0->segments_left;
		    }
		}
	      else
		tr->num_segments = 0xFF;
	    }

	  /* Increase the counters */
	  vlib_increment_combined_counter
	    (((next0 ==
	       SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
	      &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
	     1, vlib_buffer_length_in_chain (vm, b0));

	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
					   n_left_to_next, bi0, next0);
	}
      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
    }
  return from_frame->n_vectors;
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sr_localsid_d_node) = {
  .function = sr_localsid_d_fn,
  .name = "sr-localsid-d",
  .vector_size = sizeof (u32),
  .format_trace = format_sr_localsid_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = SR_LOCALSID_N_ERROR,
  .error_strings = sr_localsid_error_strings,
  .n_next_nodes = SR_LOCALSID_N_NEXT,
  .next_nodes = {
#define _(s,n) [SR_LOCALSID_NEXT_##s] = n,
    foreach_sr_localsid_next
#undef _
  },
};
/* *INDENT-ON* */

/**
 * @brief SR LocalSID graph node. Supports all default SR Endpoint without decaps
 */
static uword
sr_localsid_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
		vlib_frame_t * from_frame)
{
  u32 n_left_from, next_index, *from, *to_next;
  ip6_sr_main_t *sm = &sr_main;
  from = vlib_frame_vector_args (from_frame);
  n_left_from = from_frame->n_vectors;
  next_index = node->cached_next_index;
  u32 thread_index = vm->thread_index;

  while (n_left_from > 0)
    {
      u32 n_left_to_next;
      vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);

      /* Quad - Loop */
      while (n_left_from >= 8 && n_left_to_next >= 4)
	{
	  u32 bi0, bi1, bi2, bi3;
	  vlib_buffer_t *b0, *b1, *b2, *b3;
	  ip6_header_t *ip0, *ip1, *ip2, *ip3;
	  ip6_sr_header_t *sr0, *sr1, *sr2, *sr3;
	  ip6_ext_header_t *prev0, *prev1, *prev2, *prev3;
	  u32 next0, next1, next2, next3;
	  next0 = next1 = next2 = next3 = SR_LOCALSID_NEXT_IP6_LOOKUP;
	  ip6_sr_localsid_t *ls0, *ls1, *ls2, *ls3;

	  /* Prefetch next iteration. */
	  {
	    vlib_buffer_t *p4, *p5, *p6, *p7;

	    p4 = vlib_get_buffer (vm, from[4]);
	    p5 = vlib_get_buffer (vm, from[5]);
	    p6 = vlib_get_buffer (vm, from[6]);
	    p7 = vlib_get_buffer (vm, from[7]);

	    /* Prefetch the buffer header and packet for the N+2 loop iteration */
	    vlib_prefetch_buffer_header (p4, LOAD);
	    vlib_prefetch_buffer_header (p5, LOAD);
	    vlib_prefetch_buffer_header (p6, LOAD);
	    vlib_prefetch_buffer_header (p7, LOAD);

	    CLIB_PREFETCH (p4->data, CLIB_CACHE_LINE_BYTES, STORE);
	    CLIB_PREFETCH (p5->data, CLIB_CACHE_LINE_BYTES, STORE);
	    CLIB_PREFETCH (p6->data, CLIB_CACHE_LINE_BYTES, STORE);
	    CLIB_PREFETCH (p7->data, CLIB_CACHE_LINE_BYTES, STORE);
	  }

	  to_next[0] = bi0 = from[0];
	  to_next[1] = bi1 = from[1];
	  to_next[2] = bi2 = from[2];
	  to_next[3] = bi3 = from[3];
	  from += 4;
	  to_next += 4;
	  n_left_from -= 4;
	  n_left_to_next -= 4;

	  b0 = vlib_get_buffer (vm, bi0);
	  b1 = vlib_get_buffer (vm, bi1);
	  b2 = vlib_get_buffer (vm, bi2);
	  b3 = vlib_get_buffer (vm, bi3);

	  ip0 = vlib_buffer_get_current (b0);
	  ip1 = vlib_buffer_get_current (b1);
	  ip2 = vlib_buffer_get_current (b2);
	  ip3 = vlib_buffer_get_current (b3);

	  ip6_ext_header_find_t (ip0, prev0, sr0, IP_PROTOCOL_IPV6_ROUTE);
	  ip6_ext_header_find_t (ip1, prev1, sr1, IP_PROTOCOL_IPV6_ROUTE);
	  ip6_ext_header_find_t (ip2, prev2, sr2, IP_PROTOCOL_IPV6_ROUTE);
	  ip6_ext_header_find_t (ip3, prev3, sr3, IP_PROTOCOL_IPV6_ROUTE);

	  ls0 =
	    pool_elt_at_index (sm->localsids,
			       vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
	  ls1 =
	    pool_elt_at_index (sm->localsids,
			       vnet_buffer (b1)->ip.adj_index[VLIB_TX]);
	  ls2 =
	    pool_elt_at_index (sm->localsids,
			       vnet_buffer (b2)->ip.adj_index[VLIB_TX]);
	  ls3 =
	    pool_elt_at_index (sm->localsids,
			       vnet_buffer (b3)->ip.adj_index[VLIB_TX]);

	  end_srh_processing (node, b0, ip0, sr0, ls0, &next0, ls0->end_psp,
			      prev0);
	  end_srh_processing (node, b1, ip1, sr1, ls1, &next1, ls1->end_psp,
			      prev1);
	  end_srh_processing (node, b2, ip2, sr2, ls2, &next2, ls2->end_psp,
			      prev2);
	  end_srh_processing (node, b3, ip3, sr3, ls3, &next3, ls3->end_psp,
			      prev3);

	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      sr_localsid_trace_t *tr =
		vlib_add_trace (vm, node, b0, sizeof (*tr));
	      tr->num_segments = 0;
	      clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
			   sizeof (tr->localsid.as_u8));
	      tr->behavior = ls0->behavior;
	      if (ip0 == vlib_buffer_get_current (b0))
		{
		  if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
		      && sr0->type == ROUTING_HEADER_TYPE_SR)
		    {
		      clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
		      tr->num_segments =
			sr0->length * 8 / sizeof (ip6_address_t);
		      tr->segments_left = sr0->segments_left;
		    }
		}
	      else
		tr->num_segments = 0xFF;
	    }

	  if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      sr_localsid_trace_t *tr =
		vlib_add_trace (vm, node, b1, sizeof (*tr));
	      tr->num_segments = 0;
	      clib_memcpy (tr->localsid.as_u8, ls1->localsid.as_u8,
			   sizeof (tr->localsid.as_u8));
	      tr->behavior = ls1->behavior;
	      if (ip1 == vlib_buffer_get_current (b1))
		{
		  if (ip1->protocol == IP_PROTOCOL_IPV6_ROUTE
		      && sr1->type == ROUTING_HEADER_TYPE_SR)
		    {
		      clib_memcpy (tr->sr, sr1->segments, sr1->length * 8);
		      tr->num_segments =
			sr1->length * 8 / sizeof (ip6_address_t);
		      tr->segments_left = sr1->segments_left;
		    }
		}
	      else
		tr->num_segments = 0xFF;
	    }

	  if (PREDICT_FALSE (b2->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      sr_localsid_trace_t *tr =
		vlib_add_trace (vm, node, b2, sizeof (*tr));
	      tr->num_segments = 0;
	      clib_memcpy (tr->localsid.as_u8, ls2->localsid.as_u8,
			   sizeof (tr->localsid.as_u8));
	      tr->behavior = ls2->behavior;
	      if (ip2 == vlib_buffer_get_current (b2))
		{
		  if (ip2->protocol == IP_PROTOCOL_IPV6_ROUTE
		      && sr2->type == ROUTING_HEADER_TYPE_SR)
		    {
		      clib_memcpy (tr->sr, sr2->segments, sr2->length * 8);
		      tr->num_segments =
			sr2->length * 8 / sizeof (ip6_address_t);
		      tr->segments_left = sr2->segments_left;
		    }
		}
	      else
		tr->num_segments = 0xFF;
	    }

	  if (PREDICT_FALSE (b3->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      sr_localsid_trace_t *tr =
		vlib_add_trace (vm, node, b3, sizeof (*tr));
	      tr->num_segments = 0;
	      clib_memcpy (tr->localsid.as_u8, ls3->localsid.as_u8,
			   sizeof (tr->localsid.as_u8));
	      tr->behavior = ls3->behavior;
	      if (ip3 == vlib_buffer_get_current (b3))
		{
		  if (ip3->protocol == IP_PROTOCOL_IPV6_ROUTE
		      && sr3->type == ROUTING_HEADER_TYPE_SR)
		    {
		      clib_memcpy (tr->sr, sr3->segments, sr3->length * 8);
		      tr->num_segments =
			sr3->length * 8 / sizeof (ip6_address_t);
		      tr->segments_left = sr3->segments_left;
		    }
		}
	      else
		tr->num_segments = 0xFF;
	    }

	  vlib_increment_combined_counter
	    (((next0 ==
	       SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
	      &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
	     1, vlib_buffer_length_in_chain (vm, b0));

	  vlib_increment_combined_counter
	    (((next1 ==
	       SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
	      &(sm->sr_ls_valid_counters)), thread_index, ls1 - sm->localsids,
	     1, vlib_buffer_length_in_chain (vm, b1));

	  vlib_increment_combined_counter
	    (((next2 ==
	       SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
	      &(sm->sr_ls_valid_counters)), thread_index, ls2 - sm->localsids,
	     1, vlib_buffer_length_in_chain (vm, b2));

	  vlib_increment_combined_counter
	    (((next3 ==
	       SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
	      &(sm->sr_ls_valid_counters)), thread_index, ls3 - sm->localsids,
	     1, vlib_buffer_length_in_chain (vm, b3));

	  vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
					   n_left_to_next, bi0, bi1, bi2, bi3,
					   next0, next1, next2, next3);
	}

      /* Single loop for potentially the last three packets */
      while (n_left_from > 0 && n_left_to_next > 0)
	{
	  u32 bi0;
	  vlib_buffer_t *b0;
	  ip6_header_t *ip0 = 0;
	  ip6_ext_header_t *prev0;
	  ip6_sr_header_t *sr0;
	  u32 next0 = SR_LOCALSID_NEXT_IP6_LOOKUP;
	  ip6_sr_localsid_t *ls0;

	  bi0 = from[0];
	  to_next[0] = bi0;
	  from += 1;
	  to_next += 1;
	  n_left_from -= 1;
	  n_left_to_next -= 1;

	  b0 = vlib_get_buffer (vm, bi0);
	  ip0 = vlib_buffer_get_current (b0);
	  ip6_ext_header_find_t (ip0, prev0, sr0, IP_PROTOCOL_IPV6_ROUTE);

	  /* Lookup the SR End behavior based on IP DA (adj) */
	  ls0 =
	    pool_elt_at_index (sm->localsids,
			       vnet_buffer (b0)->ip.adj_index[VLIB_TX]);

	  /* SRH processing */
	  end_srh_processing (node, b0, ip0, sr0, ls0, &next0, ls0->end_psp,
			      prev0);

	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
	    {
	      sr_localsid_trace_t *tr =
		vlib_add_trace (vm, node, b0, sizeof (*tr));
	      tr->num_segments = 0;
	      clib_memcpy (tr->localsid.as_u8, ls0->localsid.as_u8,
			   sizeof (tr->localsid.as_u8));
	      tr->behavior = ls0->behavior;
	      if (ip0 == vlib_buffer_get_current (b0))
		{
		  if (ip0->protocol == IP_PROTOCOL_IPV6_ROUTE
		      && sr0->type == ROUTING_HEADER_TYPE_SR)
		    {
		      clib_memcpy (tr->sr, sr0->segments, sr0->length * 8);
		      tr->num_segments =
			sr0->length * 8 / sizeof (ip6_address_t);
		      tr->segments_left = sr0->segments_left;
		    }
		}
	      else
		tr->num_segments = 0xFF;
	    }

	  vlib_increment_combined_counter
	    (((next0 ==
	       SR_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) :
	      &(sm->sr_ls_valid_counters)), thread_index, ls0 - sm->localsids,
	     1, vlib_buffer_length_in_chain (vm, b0));

	  vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
					   n_left_to_next, bi0, next0);
	}
      vlib_put_next_frame (vm, node, next_index, n_left_to_next);
    }
  return from_frame->n_vectors;
}

/* *INDENT-OFF* */
VLIB_REGISTER_NODE (sr_localsid_node) = {
  .function = sr_localsid_fn,
  .name = "sr-localsid",
  .vector_size = sizeof (u32),
  .format_trace = format_sr_localsid_trace,
  .type = VLIB_NODE_TYPE_INTERNAL,
  .n_errors = SR_LOCALSID_N_ERROR,
  .error_strings = sr_localsid_error_strings,
  .n_next_nodes = SR_LOCALSID_N_NEXT,
  .next_nodes = {
#define _(s,n) [SR_LOCALSID_NEXT_##s] = n,
    foreach_sr_localsid_next
#undef _
  },
};
/* *INDENT-ON* */

static u8 *
format_sr_dpo (u8 * s, va_list * args)
{
  index_t index = va_arg (*args, index_t);
  CLIB_UNUSED (u32 indent) = va_arg (*args, u32);

  return (format (s, "SR: localsid_index:[%d]", index));
}

const static dpo_vft_t sr_loc_vft = {
  .dv_lock = sr_dpo_lock,
  .dv_unlock = sr_dpo_unlock,
  .dv_format = format_sr_dpo,
};

const static char *const sr_loc_ip6_nodes[] = {
  "sr-localsid",
  NULL,
};

const static char *const *const sr_loc_nodes[DPO_PROTO_NUM] = {
  [DPO_PROTO_IP6] = sr_loc_ip6_nodes,
};

const static char *const sr_loc_d_ip6_nodes[] = {
  "sr-localsid-d",
  NULL,
};

const static char *const *const sr_loc_d_nodes[DPO_PROTO_NUM] = {
  [DPO_PROTO_IP6] = sr_loc_d_ip6_nodes,
};


/*************************** SR LocalSID plugins ******************************/
/**
 * @brief SR LocalSID plugin registry
 */
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)
{
  ip6_sr_main_t *sm = &sr_main;
  uword *p;

  sr_localsid_fn_registration_t *plugin;

  /* Did this function exist? If so update it */
  p = hash_get_mem (sm->plugin_functions_by_key, fn_name);
  if (p)
    {
      plugin = pool_elt_at_index (sm->plugin_functions, p[0]);
    }
  /* Else create a new one and set hash key */
  else
    {
      pool_get (sm->plugin_functions, plugin);
      hash_set_mem (sm->plugin_functions_by_key, fn_name,
		    plugin - sm->plugin_functions);
    }

  memset (plugin, 0, sizeof (*plugin));

  plugin->sr_localsid_function_number = (plugin - sm->plugin_functions);
  plugin->sr_localsid_function_number += SR_BEHAVIOR_LAST;
  plugin->ls_format = ls_format;
  plugin->ls_unformat = ls_unformat;
  plugin->creation = creation_fn;
  plugin->removal = removal_fn;
  clib_memcpy (&plugin->dpo, dpo, sizeof (dpo_type_t));
  plugin->function_name = format (0, "%s%c", fn_name, 0);
  plugin->keyword_str = format (0, "%s%c", keyword_str, 0);
  plugin->def_str = format (0, "%s%c", def_str, 0);
  plugin->params_str = format (0, "%s%c", params_str, 0);

  return plugin->sr_localsid_function_number;
}

/**
 * @brief CLI function to 'show' all available SR LocalSID behaviors
 */
static clib_error_t *
show_sr_localsid_behaviors_command_fn (vlib_main_t * vm,
				       unformat_input_t * input,
				       vlib_cli_command_t * cmd)
{
  ip6_sr_main_t *sm = &sr_main;
  sr_localsid_fn_registration_t *plugin;
  sr_localsid_fn_registration_t **plugins_vec = 0;
  int i;

  vlib_cli_output (vm,
		   "SR LocalSIDs behaviors:\n-----------------------\n\n");

  /* *INDENT-OFF* */
  pool_foreach (plugin, sm->plugin_functions,
    ({ vec_add1 (plugins_vec, plugin); }));
  /* *INDENT-ON* */

  /* Print static behaviors */
  vlib_cli_output (vm, "Default behaviors:\n"
		   "\tEnd\t-> Endpoint.\n"
		   "\tEnd.X\t-> Endpoint with Layer-3 cross-connect.\n"
		   "\t\tParameters: '<iface> <ip6_next_hop>'\n"
		   "\tEnd.T\t-> Endpoint with specific IPv6 table lookup.\n"
		   "\t\tParameters: '<fib_table>'\n"
		   "\tEnd.DX2\t-> Endpoint with decapsulation and Layer-2 cross-connect.\n"
		   "\t\tParameters: '<iface>'\n"
		   "\tEnd.DX6\t-> Endpoint with decapsulation and IPv6 cross-connect.\n"
		   "\t\tParameters: '<iface> <ip6_next_hop>'\n"
		   "\tEnd.DX4\t-> Endpoint with decapsulation and IPv4 cross-connect.\n"
		   "\t\tParameters: '<iface> <ip4_next_hop>'\n"
		   "\tEnd.DT6\t-> Endpoint with decapsulation and specific IPv6 table lookup.\n"
		   "\t\tParameters: '<ip6_fib_table>'\n"
		   "\tEnd.DT4\t-> Endpoint with decapsulation and specific IPv4 table lookup.\n"
		   "\t\tParameters: '<ip4_fib_table>'\n");
  vlib_cli_output (vm, "Plugin behaviors:\n");
  for (i = 0; i < vec_len (plugins_vec); i++)
    {
      plugin = plugins_vec[i];
      vlib_cli_output (vm, "\t%s\t-> %s.\n", plugin->keyword_str,
		       plugin->def_str);
      vlib_cli_output (vm, "\t\tParameters: '%s'\n", plugin->params_str);
    }
  return 0;
}

/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_sr_localsid_behaviors_command, static) = {
  .path = "show sr localsids behaviors",
  .short_help = "show sr localsids behaviors",
  .function = show_sr_localsid_behaviors_command_fn,
};
/* *INDENT-ON* */

/**
 * @brief SR LocalSID initialization
 */
clib_error_t *
sr_localsids_init (vlib_main_t * vm)
{
  /* Init memory for function keys */
  ip6_sr_main_t *sm = &sr_main;
  mhash_init (&sm->sr_localsids_index_hash, sizeof (uword),
	      sizeof (ip6_address_t));
  /* Init SR behaviors DPO type */
  sr_localsid_dpo_type = dpo_register_new_type (&sr_loc_vft, sr_loc_nodes);
  /* Init SR behaviors DPO type */
  sr_localsid_d_dpo_type =
    dpo_register_new_type (&sr_loc_vft, sr_loc_d_nodes);
  /* Init memory for localsid plugins */
  sm->plugin_functions_by_key = hash_create_string (0, sizeof (uword));
  return 0;
}

VLIB_INIT_FUNCTION (sr_localsids_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/