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authorPablo Camarillo <pcamaril@cisco.com>2017-04-24 17:51:56 +0200
committerNeale Ranns <nranns@cisco.com>2017-05-05 11:38:39 +0000
commit5d73eecd63018db69b10bf56adeec9cc5cf92790 (patch)
tree5fc242e79737b2a95a75d44bfbde3d4d91db4c9f /src/vnet/srv6/sr_localsid.c
parenta774b53623f60b5e8ea8ed634d6a41e847743715 (diff)
First commit SR MPLS
Change-Id: I961685a2a0e4c314049444c64eb6ccf877c278dd Signed-off-by: Pablo Camarillo <pcamaril@cisco.com>
Diffstat (limited to 'src/vnet/srv6/sr_localsid.c')
-rwxr-xr-xsrc/vnet/srv6/sr_localsid.c1492
1 files changed, 1492 insertions, 0 deletions
diff --git a/src/vnet/srv6/sr_localsid.c b/src/vnet/srv6/sr_localsid.c
new file mode 100755
index 00000000000..bdc66386f32
--- /dev/null
+++ b/src/vnet/srv6/sr_localsid.c
@@ -0,0 +1,1492 @@
+/*
+ * 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 1;
+ }
+ 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_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 = 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.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_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->fib_table);
+ 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->fib_table);
+ 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
+{
+ u32 localsid_index;
+ ip6_address_t src, out_dst;
+ u8 sr[256];
+ u8 num_segments;
+ u8 segments_left;
+ //With SRv6 header update include flags here.
+} 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 *);
+ ip6_sr_main_t *sm = &sr_main;
+ sr_localsid_trace_t *t = va_arg (*args, sr_localsid_trace_t *);
+
+ ip6_sr_localsid_t *ls =
+ pool_elt_at_index (sm->localsids, t->localsid_index);
+
+ s =
+ format (s, "SR-LOCALSID:\n\tLocalsid: %U\n", format_ip6_address,
+ &ls->localsid);
+ switch (ls->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_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->num_segments);
+ 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)
+{
+ ip6_address_t *new_dst0;
+
+ if (PREDICT_TRUE (sr0->type == ROUTING_HEADER_TYPE_SR))
+ {
+ 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
+ {
+ *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
+ */
+//FixME. I must crosscheck that next_proto matches the localsid
+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->fib_table;
+ 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->fib_table;
+ *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 Function doing End processing with PSP
+ */
+static_always_inline void
+end_psp_srh_processing (vlib_node_runtime_t * node,
+ vlib_buffer_t * b0,
+ ip6_header_t * ip0,
+ ip6_ext_header_t * prev0,
+ ip6_sr_header_t * sr0,
+ ip6_sr_localsid_t * ls0, u32 * next0)
+{
+ u32 new_l0, sr_len;
+ u64 *copy_dst0, *copy_src0;
+ u32 copy_len_u64s0 = 0;
+ int i;
+
+ if (PREDICT_TRUE (sr0->type == ROUTING_HEADER_TYPE_SR))
+ {
+ if (PREDICT_TRUE (sr0->segments_left == 1))
+ {
+ 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];
+
+ 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;
+ }
+ return;
+ }
+ }
+ /* Error. Routing header of type != SR */
+ *next0 = SR_LOCALSID_NEXT_ERROR;
+ b0->error = node->errors[SR_LOCALSID_ERROR_NO_PSP];
+}
+
+/**
+ * @brief SR LocalSID graph node. Supports all default SR Endpoint variants
+ */
+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 = vlib_get_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 (b0)->ip.adj_index[VLIB_TX]);
+ ls2 =
+ pool_elt_at_index (sm->localsids,
+ vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
+ ls3 =
+ pool_elt_at_index (sm->localsids,
+ vnet_buffer (b0)->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);
+
+ //TODO: trace.
+
+ 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;
+ tr->localsid_index = ls0 - sm->localsids;
+
+ if (ip0 == vlib_buffer_get_current (b0))
+ {
+ clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8,
+ sizeof (tr->src.as_u8));
+ clib_memcpy (tr->out_dst.as_u8, ip0->dst_address.as_u8,
+ sizeof (tr->out_dst.as_u8));
+ 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 variants
+ */
+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 = vlib_get_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 (b0)->ip.adj_index[VLIB_TX]);
+ ls2 =
+ pool_elt_at_index (sm->localsids,
+ vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
+ ls3 =
+ pool_elt_at_index (sm->localsids,
+ vnet_buffer (b0)->ip.adj_index[VLIB_TX]);
+
+ if (ls0->end_psp)
+ end_psp_srh_processing (node, b0, ip0, prev0, sr0, ls0, &next0);
+ else
+ end_srh_processing (node, b0, ip0, sr0, ls0, &next0);
+
+ if (ls1->end_psp)
+ end_psp_srh_processing (node, b1, ip1, prev1, sr1, ls1, &next1);
+ else
+ end_srh_processing (node, b1, ip1, sr1, ls1, &next1);
+
+ if (ls2->end_psp)
+ end_psp_srh_processing (node, b2, ip2, prev2, sr2, ls2, &next2);
+ else
+ end_srh_processing (node, b2, ip2, sr2, ls2, &next2);
+
+ if (ls3->end_psp)
+ end_psp_srh_processing (node, b3, ip3, prev3, sr3, ls3, &next3);
+ else
+ end_srh_processing (node, b3, ip3, sr3, ls3, &next3);
+
+ //TODO: proper trace.
+
+ 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 */
+ if (ls0->end_psp)
+ end_psp_srh_processing (node, b0, ip0, prev0, sr0, ls0, &next0);
+ else
+ end_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;
+ tr->localsid_index = ls0 - sm->localsids;
+
+ if (ip0 == vlib_buffer_get_current (b0))
+ {
+ clib_memcpy (tr->src.as_u8, ip0->src_address.as_u8,
+ sizeof (tr->src.as_u8));
+ clib_memcpy (tr->out_dst.as_u8, ip0->dst_address.as_u8,
+ sizeof (tr->out_dst.as_u8));
+ 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 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");
+ 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:
+*/