blob: 181a908022bee37d6a23845cb67ea3121c2b28c4 [file] [log] [blame]
Ed Warnickecb9cada2015-12-08 15:45:58 -07001/*
2 * gre_interface.c: gre interfaces
3 *
4 * Copyright (c) 2012 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18#include <vnet/vnet.h>
19#include <vnet/pg/pg.h>
20#include <vnet/gre/gre.h>
Chris Luke27fe48f2016-04-28 13:44:38 -040021#include <vnet/ip/format.h>
Neale Ranns0bfe5d82016-08-25 15:29:12 +010022#include <vnet/fib/ip4_fib.h>
Ciara Loftus7eac9162016-09-30 15:47:03 +010023#include <vnet/fib/ip6_fib.h>
Neale Ranns0bfe5d82016-08-25 15:29:12 +010024#include <vnet/adj/adj_midchain.h>
Neale Rannsb80c5362016-10-08 13:03:40 +010025#include <vnet/adj/adj_nbr.h>
Neale Ranns0bfe5d82016-08-25 15:29:12 +010026#include <vnet/mpls/mpls.h>
Neale Ranns3b81a1e2018-09-06 09:50:26 -070027#include <vnet/l2/l2_input.h>
Ed Warnickecb9cada2015-12-08 15:45:58 -070028
Neale Ranns177bbdc2016-11-15 09:46:51 +000029static const char *gre_tunnel_type_names[] = GRE_TUNNEL_TYPE_NAMES;
30
Neale Ranns0bfe5d82016-08-25 15:29:12 +010031static u8 *
32format_gre_tunnel (u8 * s, va_list * args)
Chris Luke27fe48f2016-04-28 13:44:38 -040033{
Swarup Nayak9ff647a2017-11-27 10:27:43 +053034 gre_tunnel_t *t = va_arg (*args, gre_tunnel_t *);
Chris Luke27fe48f2016-04-28 13:44:38 -040035
John Loa43ccae2018-02-13 17:15:23 -050036 s = format (s, "[%d] instance %d src %U dst %U fib-idx %d sw-if-idx %d ",
37 t->dev_instance, t->user_instance,
John Lo4478d8e2018-01-12 17:15:25 -050038 format_ip46_address, &t->tunnel_src, IP46_TYPE_ANY,
39 format_ip46_address, &t->tunnel_dst.fp_addr, IP46_TYPE_ANY,
40 t->outer_fib_index, t->sw_if_index);
41
John Loa43ccae2018-02-13 17:15:23 -050042 s = format (s, "payload %s ", gre_tunnel_type_names[t->type]);
43
44 if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
45 s = format (s, "session %d ", t->session_id);
46
47 if (t->type != GRE_TUNNEL_TYPE_L3)
48 s = format (s, "l2-adj-idx %d ", t->l2_adj_index);
Neale Ranns0bfe5d82016-08-25 15:29:12 +010049
Chris Luke27fe48f2016-04-28 13:44:38 -040050 return s;
51}
52
Neale Ranns0bfe5d82016-08-25 15:29:12 +010053static gre_tunnel_t *
John Loa43ccae2018-02-13 17:15:23 -050054gre_tunnel_db_find (const vnet_gre_add_del_tunnel_args_t * a,
55 u32 outer_fib_index, gre_tunnel_key_t * key)
Neale Ranns0bfe5d82016-08-25 15:29:12 +010056{
Swarup Nayak9ff647a2017-11-27 10:27:43 +053057 gre_main_t *gm = &gre_main;
58 uword *p;
Neale Ranns0bfe5d82016-08-25 15:29:12 +010059
John Loa43ccae2018-02-13 17:15:23 -050060 if (!a->is_ipv6)
Ciara Loftus7eac9162016-09-30 15:47:03 +010061 {
John Loa43ccae2018-02-13 17:15:23 -050062 gre_mk_key4 (a->src.ip4, a->dst.ip4, outer_fib_index,
63 a->tunnel_type, a->session_id, &key->gtk_v4);
Neale Ranns33ce60d2017-12-14 08:51:32 -080064 p = hash_get_mem (gm->tunnel_by_key4, &key->gtk_v4);
Ciara Loftus7eac9162016-09-30 15:47:03 +010065 }
66 else
67 {
John Loa43ccae2018-02-13 17:15:23 -050068 gre_mk_key6 (&a->src.ip6, &a->dst.ip6, outer_fib_index,
69 a->tunnel_type, a->session_id, &key->gtk_v6);
Neale Ranns33ce60d2017-12-14 08:51:32 -080070 p = hash_get_mem (gm->tunnel_by_key6, &key->gtk_v6);
Ciara Loftus7eac9162016-09-30 15:47:03 +010071 }
Neale Ranns0bfe5d82016-08-25 15:29:12 +010072
73 if (NULL == p)
74 return (NULL);
75
76 return (pool_elt_at_index (gm->tunnels, p[0]));
77}
78
79static void
Neale Ranns33ce60d2017-12-14 08:51:32 -080080gre_tunnel_db_add (gre_tunnel_t * t, gre_tunnel_key_t * key)
Neale Ranns0bfe5d82016-08-25 15:29:12 +010081{
Swarup Nayak9ff647a2017-11-27 10:27:43 +053082 gre_main_t *gm = &gre_main;
Neale Ranns0bfe5d82016-08-25 15:29:12 +010083
Neale Ranns33ce60d2017-12-14 08:51:32 -080084 t->key = clib_mem_alloc (sizeof (*t->key));
85 clib_memcpy (t->key, key, sizeof (*key));
86
87 if (t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6)
Ciara Loftus7eac9162016-09-30 15:47:03 +010088 {
John Loa43ccae2018-02-13 17:15:23 -050089 hash_set_mem (gm->tunnel_by_key6, &t->key->gtk_v6, t->dev_instance);
Ciara Loftus7eac9162016-09-30 15:47:03 +010090 }
91 else
92 {
John Loa43ccae2018-02-13 17:15:23 -050093 hash_set_mem (gm->tunnel_by_key4, &t->key->gtk_v4, t->dev_instance);
Ciara Loftus7eac9162016-09-30 15:47:03 +010094 }
Neale Ranns0bfe5d82016-08-25 15:29:12 +010095}
96
97static void
Neale Ranns33ce60d2017-12-14 08:51:32 -080098gre_tunnel_db_remove (gre_tunnel_t * t)
Neale Ranns0bfe5d82016-08-25 15:29:12 +010099{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530100 gre_main_t *gm = &gre_main;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100101
Neale Ranns33ce60d2017-12-14 08:51:32 -0800102 if (t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6)
Ciara Loftus7eac9162016-09-30 15:47:03 +0100103 {
Neale Ranns33ce60d2017-12-14 08:51:32 -0800104 hash_unset_mem (gm->tunnel_by_key6, &t->key->gtk_v6);
Ciara Loftus7eac9162016-09-30 15:47:03 +0100105 }
106 else
107 {
Neale Ranns33ce60d2017-12-14 08:51:32 -0800108 hash_unset_mem (gm->tunnel_by_key4, &t->key->gtk_v4);
Ciara Loftus7eac9162016-09-30 15:47:03 +0100109 }
110
Neale Ranns33ce60d2017-12-14 08:51:32 -0800111 clib_mem_free (t->key);
112 t->key = NULL;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100113}
114
115static gre_tunnel_t *
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530116gre_tunnel_from_fib_node (fib_node_t * node)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100117{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530118 ASSERT (FIB_NODE_TYPE_GRE_TUNNEL == node->fn_type);
119 return ((gre_tunnel_t *) (((char *) node) -
120 STRUCT_OFFSET_OF (gre_tunnel_t, node)));
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100121}
122
Neale Ranns5e575b12016-10-03 09:40:25 +0100123/**
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100124 * gre_tunnel_stack
125 *
126 * 'stack' (resolve the recursion for) the tunnel's midchain adjacency
127 */
Neale Ranns5e575b12016-10-03 09:40:25 +0100128void
Neale Rannsb80c5362016-10-08 13:03:40 +0100129gre_tunnel_stack (adj_index_t ai)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100130{
Neale Ranns2646c802018-09-19 04:55:32 -0700131 fib_forward_chain_type_t fib_fwd;
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530132 gre_main_t *gm = &gre_main;
Neale Ranns2646c802018-09-19 04:55:32 -0700133 dpo_id_t tmp = DPO_INVALID;
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530134 ip_adjacency_t *adj;
135 gre_tunnel_t *gt;
136 u32 sw_if_index;
Neale Rannsb80c5362016-10-08 13:03:40 +0100137
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530138 adj = adj_get (ai);
139 sw_if_index = adj->rewrite_header.sw_if_index;
Neale Rannsb80c5362016-10-08 13:03:40 +0100140
Eyal Baricd307742018-07-22 12:45:15 +0300141 if ((vec_len (gm->tunnel_index_by_sw_if_index) <= sw_if_index) ||
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530142 (~0 == gm->tunnel_index_by_sw_if_index[sw_if_index]))
143 return;
Neale Rannsb80c5362016-10-08 13:03:40 +0100144
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530145 gt = pool_elt_at_index (gm->tunnels,
146 gm->tunnel_index_by_sw_if_index[sw_if_index]);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100147
John Loa43ccae2018-02-13 17:15:23 -0500148 if ((vnet_hw_interface_get_flags (vnet_get_main (), gt->hw_if_index) &
149 VNET_HW_INTERFACE_FLAG_LINK_UP) == 0)
Neale Rannsb80c5362016-10-08 13:03:40 +0100150 {
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530151 adj_nbr_midchain_unstack (ai);
John Loa43ccae2018-02-13 17:15:23 -0500152 return;
Neale Rannsb80c5362016-10-08 13:03:40 +0100153 }
John Loa43ccae2018-02-13 17:15:23 -0500154
Neale Ranns2646c802018-09-19 04:55:32 -0700155 fib_fwd = fib_forw_chain_type_from_fib_proto (gt->tunnel_dst.fp_proto);
John Loa43ccae2018-02-13 17:15:23 -0500156
157 fib_entry_contribute_forwarding (gt->fib_entry_index, fib_fwd, &tmp);
158 if (DPO_LOAD_BALANCE == tmp.dpoi_type)
159 {
160 /*
161 * post GRE rewrite we will load-balance. However, the GRE encap
162 * is always the same for this adjacency/tunnel and hence the IP/GRE
163 * src,dst hash is always the same result too. So we do that hash now and
164 * stack on the choice.
165 * If the choice is an incomplete adj then we will need a poke when
166 * it becomes complete. This happens since the adj update walk propagates
167 * as far a recursive paths.
168 */
169 const dpo_id_t *choice;
170 load_balance_t *lb;
171 int hash;
172
173 lb = load_balance_get (tmp.dpoi_index);
174
175 if (fib_fwd == FIB_FORW_CHAIN_TYPE_UNICAST_IP4)
176 hash = ip4_compute_flow_hash ((ip4_header_t *) adj_get_rewrite (ai),
177 lb->lb_hash_config);
178 else
179 hash = ip6_compute_flow_hash ((ip6_header_t *) adj_get_rewrite (ai),
180 lb->lb_hash_config);
181 choice =
182 load_balance_get_bucket_i (lb, hash & lb->lb_n_buckets_minus_1);
183 dpo_copy (&tmp, choice);
184 }
185
186 adj_nbr_midchain_stack (ai, &tmp);
187 dpo_reset (&tmp);
Neale Rannsb80c5362016-10-08 13:03:40 +0100188}
189
190/**
191 * @brief Call back when restacking all adjacencies on a GRE interface
192 */
193static adj_walk_rc_t
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530194gre_adj_walk_cb (adj_index_t ai, void *ctx)
Neale Rannsb80c5362016-10-08 13:03:40 +0100195{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530196 gre_tunnel_stack (ai);
Neale Rannsb80c5362016-10-08 13:03:40 +0100197
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530198 return (ADJ_WALK_RC_CONTINUE);
Neale Rannsb80c5362016-10-08 13:03:40 +0100199}
200
201static void
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530202gre_tunnel_restack (gre_tunnel_t * gt)
Neale Rannsb80c5362016-10-08 13:03:40 +0100203{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530204 fib_protocol_t proto;
Neale Rannsb80c5362016-10-08 13:03:40 +0100205
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530206 /*
207 * walk all the adjacencies on th GRE interface and restack them
208 */
209 FOR_EACH_FIB_IP_PROTOCOL (proto)
210 {
211 adj_nbr_walk (gt->sw_if_index, proto, gre_adj_walk_cb, NULL);
212 }
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100213}
214
215/**
216 * Function definition to backwalk a FIB node
217 */
218static fib_node_back_walk_rc_t
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530219gre_tunnel_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100220{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530221 gre_tunnel_restack (gre_tunnel_from_fib_node (node));
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100222
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530223 return (FIB_NODE_BACK_WALK_CONTINUE);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100224}
225
226/**
227 * Function definition to get a FIB node from its index
228 */
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530229static fib_node_t *
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100230gre_tunnel_fib_node_get (fib_node_index_t index)
231{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530232 gre_tunnel_t *gt;
233 gre_main_t *gm;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100234
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530235 gm = &gre_main;
236 gt = pool_elt_at_index (gm->tunnels, index);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100237
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530238 return (&gt->node);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100239}
240
241/**
242 * Function definition to inform the FIB node that its last lock has gone.
243 */
244static void
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530245gre_tunnel_last_lock_gone (fib_node_t * node)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100246{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530247 /*
248 * The MPLS GRE tunnel is a root of the graph. As such
249 * it never has children and thus is never locked.
250 */
251 ASSERT (0);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100252}
253
254/*
255 * Virtual function table registered by MPLS GRE tunnels
256 * for participation in the FIB object graph.
257 */
258const static fib_node_vft_t gre_vft = {
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530259 .fnv_get = gre_tunnel_fib_node_get,
260 .fnv_last_lock = gre_tunnel_last_lock_gone,
261 .fnv_back_walk = gre_tunnel_back_walk,
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100262};
263
Ciara Loftus7eac9162016-09-30 15:47:03 +0100264static int
John Loa43ccae2018-02-13 17:15:23 -0500265vnet_gre_tunnel_add (vnet_gre_add_del_tunnel_args_t * a,
266 u32 outer_fib_index, u32 * sw_if_indexp)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700267{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530268 gre_main_t *gm = &gre_main;
269 vnet_main_t *vnm = gm->vnet_main;
270 ip4_main_t *im4 = &ip4_main;
271 ip6_main_t *im6 = &ip6_main;
272 gre_tunnel_t *t;
273 vnet_hw_interface_t *hi;
Chris Luke27fe48f2016-04-28 13:44:38 -0400274 u32 hw_if_index, sw_if_index;
David Hothama8cd3092016-09-19 09:55:07 -0700275 clib_error_t *error;
Ciara Loftus7eac9162016-09-30 15:47:03 +0100276 u8 is_ipv6 = a->is_ipv6;
Neale Ranns33ce60d2017-12-14 08:51:32 -0800277 gre_tunnel_key_t key;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700278
John Loa43ccae2018-02-13 17:15:23 -0500279 t = gre_tunnel_db_find (a, outer_fib_index, &key);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100280 if (NULL != t)
John Loa43ccae2018-02-13 17:15:23 -0500281 return VNET_API_ERROR_IF_ALREADY_EXISTS;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700282
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100283 pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES);
284 memset (t, 0, sizeof (*t));
John Loa43ccae2018-02-13 17:15:23 -0500285
286 /* Reconcile the real dev_instance and a possible requested instance */
287 u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */
288 u32 u_idx = a->instance; /* user specified instance */
289 if (u_idx == ~0)
290 u_idx = t_idx;
291 if (hash_get (gm->instance_used, u_idx))
292 {
293 pool_put (gm->tunnels, t);
294 return VNET_API_ERROR_INSTANCE_IN_USE;
295 }
296 hash_set (gm->instance_used, u_idx, 1);
297
298 t->dev_instance = t_idx; /* actual */
299 t->user_instance = u_idx; /* name */
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530300 fib_node_init (&t->node, FIB_NODE_TYPE_GRE_TUNNEL);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700301
John Loa43ccae2018-02-13 17:15:23 -0500302 t->type = a->tunnel_type;
303 if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
304 t->session_id = a->session_id;
Neale Ranns177bbdc2016-11-15 09:46:51 +0000305
John Loa43ccae2018-02-13 17:15:23 -0500306 if (t->type == GRE_TUNNEL_TYPE_L3)
307 hw_if_index = vnet_register_interface (vnm, gre_device_class.index, t_idx,
308 gre_hw_interface_class.index,
309 t_idx);
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530310 else
311 {
John Loa43ccae2018-02-13 17:15:23 -0500312 /* Default MAC address (d00b:eed0:0000 + sw_if_index) */
John Lo25d417f2018-02-15 15:47:53 -0500313 u8 address[6] =
314 { 0xd0, 0x0b, 0xee, 0xd0, (u8) (t_idx >> 8), (u8) t_idx };
315 error =
316 ethernet_register_interface (vnm, gre_device_class.index, t_idx,
317 address, &hw_if_index, 0);
John Loa43ccae2018-02-13 17:15:23 -0500318 if (error)
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530319 {
John Loa43ccae2018-02-13 17:15:23 -0500320 clib_error_report (error);
321 return VNET_API_ERROR_INVALID_REGISTRATION;
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530322 }
Chris Luke27fe48f2016-04-28 13:44:38 -0400323 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700324
John Loa43ccae2018-02-13 17:15:23 -0500325 /* Set GRE tunnel interface output node (not used for L3 payload) */
326 vnet_set_interface_output_node (vnm, hw_if_index, gre_encap_node.index);
327
328 hi = vnet_get_hw_interface (vnm, hw_if_index);
329 sw_if_index = hi->sw_if_index;
330
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100331 t->hw_if_index = hw_if_index;
332 t->outer_fib_index = outer_fib_index;
333 t->sw_if_index = sw_if_index;
Neale Rannsad422ed2016-11-02 14:20:04 +0000334 t->l2_adj_index = ADJ_INDEX_INVALID;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700335
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100336 vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, sw_if_index, ~0);
John Loa43ccae2018-02-13 17:15:23 -0500337 gm->tunnel_index_by_sw_if_index[sw_if_index] = t_idx;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700338
Ciara Loftus7eac9162016-09-30 15:47:03 +0100339 if (!is_ipv6)
340 {
341 vec_validate (im4->fib_index_by_sw_if_index, sw_if_index);
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530342 hi->min_packet_bytes =
343 64 + sizeof (gre_header_t) + sizeof (ip4_header_t);
Ciara Loftus7eac9162016-09-30 15:47:03 +0100344 }
345 else
346 {
347 vec_validate (im6->fib_index_by_sw_if_index, sw_if_index);
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530348 hi->min_packet_bytes =
349 64 + sizeof (gre_header_t) + sizeof (ip6_header_t);
Ciara Loftus7eac9162016-09-30 15:47:03 +0100350 }
Chris Luke71649002016-05-06 11:51:54 -0400351
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100352 /* Standard default gre MTU. */
Ole Troand7231612018-06-07 10:17:57 +0200353 vnet_sw_interface_set_mtu (vnm, sw_if_index, 9000);
Damjan Marionfe7d4a22018-04-13 19:43:39 +0200354
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100355 /*
356 * source the FIB entry for the tunnel's destination
357 * and become a child thereof. The tunnel will then get poked
358 * when the forwarding for the entry updates, and the tunnel can
359 * re-stack accordingly
360 */
Ciara Loftus7eac9162016-09-30 15:47:03 +0100361
362 clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
363 t->tunnel_dst.fp_len = !is_ipv6 ? 32 : 128;
364 t->tunnel_dst.fp_proto = !is_ipv6 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
365 t->tunnel_dst.fp_addr = a->dst;
366
Neale Ranns33ce60d2017-12-14 08:51:32 -0800367 gre_tunnel_db_add (t, &key);
John Loa43ccae2018-02-13 17:15:23 -0500368 if (t->type == GRE_TUNNEL_TYPE_ERSPAN)
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530369 {
John Loa43ccae2018-02-13 17:15:23 -0500370 gre_sn_key_t skey;
371 gre_sn_t *gre_sn;
372
373 gre_mk_sn_key (t, &skey);
374 gre_sn = (gre_sn_t *) hash_get_mem (gm->seq_num_by_key, &skey);
375 if (gre_sn != NULL)
376 {
377 gre_sn->ref_count++;
378 t->gre_sn = gre_sn;
379 }
380 else
381 {
382 gre_sn = clib_mem_alloc (sizeof (gre_sn_t));
383 gre_sn->seq_num = 0;
384 gre_sn->ref_count = 1;
385 t->gre_sn = gre_sn;
386 hash_set_mem_alloc (&gm->seq_num_by_key, &skey, (uword) gre_sn);
387 }
388 }
389
390 t->fib_entry_index = fib_table_entry_special_add
391 (outer_fib_index, &t->tunnel_dst, FIB_SOURCE_RR, FIB_ENTRY_FLAG_NONE);
392 t->sibling_index = fib_entry_child_add
393 (t->fib_entry_index, FIB_NODE_TYPE_GRE_TUNNEL, t_idx);
394
395 if (t->type != GRE_TUNNEL_TYPE_L3)
396 {
397 t->l2_adj_index = adj_nbr_add_or_lock
398 (t->tunnel_dst.fp_proto, VNET_LINK_ETHERNET, &zero_addr, sw_if_index);
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530399 gre_update_adj (vnm, t->sw_if_index, t->l2_adj_index);
400 }
Chris Luke27fe48f2016-04-28 13:44:38 -0400401
402 if (sw_if_indexp)
403 *sw_if_indexp = sw_if_index;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700404
405 return 0;
406}
407
Ciara Loftus7eac9162016-09-30 15:47:03 +0100408static int
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530409vnet_gre_tunnel_delete (vnet_gre_add_del_tunnel_args_t * a,
John Loa43ccae2018-02-13 17:15:23 -0500410 u32 outer_fib_index, u32 * sw_if_indexp)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100411{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530412 gre_main_t *gm = &gre_main;
413 vnet_main_t *vnm = gm->vnet_main;
414 gre_tunnel_t *t;
Neale Ranns33ce60d2017-12-14 08:51:32 -0800415 gre_tunnel_key_t key;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100416 u32 sw_if_index;
John Lo101e0052018-01-06 00:22:54 -0500417
John Loa43ccae2018-02-13 17:15:23 -0500418 t = gre_tunnel_db_find (a, outer_fib_index, &key);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100419 if (NULL == t)
420 return VNET_API_ERROR_NO_SUCH_ENTRY;
421
422 sw_if_index = t->sw_if_index;
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530423 vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
John Loa43ccae2018-02-13 17:15:23 -0500424
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100425 /* make sure tunnel is removed from l2 bd or xconnect */
Neale Rannsb4743802018-09-05 09:13:57 -0700426 set_int_l2_mode (gm->vlib_main, vnm, MODE_L3, sw_if_index, 0,
427 L2_BD_PORT_TYPE_NORMAL, 0, 0);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100428 gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
Neale Ranns177bbdc2016-11-15 09:46:51 +0000429
John Loa43ccae2018-02-13 17:15:23 -0500430 if (t->type == GRE_TUNNEL_TYPE_L3)
431 vnet_delete_hw_interface (vnm, t->hw_if_index);
432 else
433 ethernet_delete_interface (vnm, t->hw_if_index);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100434
Neale Rannsad422ed2016-11-02 14:20:04 +0000435 if (t->l2_adj_index != ADJ_INDEX_INVALID)
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530436 adj_unlock (t->l2_adj_index);
Neale Rannsad422ed2016-11-02 14:20:04 +0000437
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530438 fib_entry_child_remove (t->fib_entry_index, t->sibling_index);
439 fib_table_entry_delete_index (t->fib_entry_index, FIB_SOURCE_RR);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100440
John Loa43ccae2018-02-13 17:15:23 -0500441 ASSERT ((t->type != GRE_TUNNEL_TYPE_ERSPAN) || (t->gre_sn != NULL));
442 if ((t->type == GRE_TUNNEL_TYPE_ERSPAN) && (t->gre_sn->ref_count-- == 1))
443 {
444 gre_sn_key_t skey;
445 gre_mk_sn_key (t, &skey);
446 hash_unset_mem_free (&gm->seq_num_by_key, &skey);
447 clib_mem_free (t->gre_sn);
448 }
449
450 hash_unset (gm->instance_used, t->user_instance);
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530451 gre_tunnel_db_remove (t);
452 fib_node_deinit (&t->node);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100453 pool_put (gm->tunnels, t);
454
455 if (sw_if_indexp)
456 *sw_if_indexp = sw_if_index;
457
458 return 0;
459}
460
461int
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530462vnet_gre_add_del_tunnel (vnet_gre_add_del_tunnel_args_t * a,
463 u32 * sw_if_indexp)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100464{
John Loa43ccae2018-02-13 17:15:23 -0500465 u32 outer_fib_index;
466
467 if (!a->is_ipv6)
468 outer_fib_index = ip4_fib_index_from_table_id (a->outer_fib_id);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100469 else
John Loa43ccae2018-02-13 17:15:23 -0500470 outer_fib_index = ip6_fib_index_from_table_id (a->outer_fib_id);
471
472 if (~0 == outer_fib_index)
473 return VNET_API_ERROR_NO_SUCH_FIB;
474
475 if (a->session_id > GTK_SESSION_ID_MAX)
476 return VNET_API_ERROR_INVALID_SESSION_ID;
477
478 if (a->is_add)
479 return (vnet_gre_tunnel_add (a, outer_fib_index, sw_if_indexp));
480 else
481 return (vnet_gre_tunnel_delete (a, outer_fib_index, sw_if_indexp));
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100482}
483
Neale Rannsb80c5362016-10-08 13:03:40 +0100484clib_error_t *
485gre_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100486{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530487 gre_main_t *gm = &gre_main;
488 vnet_hw_interface_t *hi;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100489 gre_tunnel_t *t;
Neale Rannsb80c5362016-10-08 13:03:40 +0100490 u32 ti;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100491
Neale Rannsb80c5362016-10-08 13:03:40 +0100492 hi = vnet_get_hw_interface (vnm, hw_if_index);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100493
Neale Rannsb80c5362016-10-08 13:03:40 +0100494 if (NULL == gm->tunnel_index_by_sw_if_index ||
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530495 hi->sw_if_index >= vec_len (gm->tunnel_index_by_sw_if_index))
496 return (NULL);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100497
Neale Rannsb80c5362016-10-08 13:03:40 +0100498 ti = gm->tunnel_index_by_sw_if_index[hi->sw_if_index];
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100499
Neale Rannsb80c5362016-10-08 13:03:40 +0100500 if (~0 == ti)
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530501 /* not one of ours */
502 return (NULL);
Neale Rannsb80c5362016-10-08 13:03:40 +0100503
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530504 t = pool_elt_at_index (gm->tunnels, ti);
Neale Rannsb80c5362016-10-08 13:03:40 +0100505
506 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530507 vnet_hw_interface_set_flags (vnm, hw_if_index,
508 VNET_HW_INTERFACE_FLAG_LINK_UP);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100509 else
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530510 vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100511
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530512 gre_tunnel_restack (t);
Neale Rannsb80c5362016-10-08 13:03:40 +0100513
514 return /* no error */ 0;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100515}
Ed Warnickecb9cada2015-12-08 15:45:58 -0700516
517static clib_error_t *
518create_gre_tunnel_command_fn (vlib_main_t * vm,
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530519 unformat_input_t * input,
520 vlib_cli_command_t * cmd)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700521{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530522 unformat_input_t _line_input, *line_input = &_line_input;
523 vnet_gre_add_del_tunnel_args_t _a, *a = &_a;
Ciara Loftus7eac9162016-09-30 15:47:03 +0100524 ip46_address_t src, dst;
John Loa43ccae2018-02-13 17:15:23 -0500525 u32 instance = ~0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700526 u32 outer_fib_id = 0;
John Loa43ccae2018-02-13 17:15:23 -0500527 gre_tunnel_type_t t_type = GRE_TUNNEL_TYPE_L3;
528 u32 session_id = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700529 int rv;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700530 u32 num_m_args = 0;
Chris Luke27fe48f2016-04-28 13:44:38 -0400531 u8 is_add = 1;
Pierre Pfister78ea9c22016-05-23 12:51:54 +0100532 u32 sw_if_index;
Billy McFalla9a20e72017-02-15 11:39:12 -0500533 clib_error_t *error = NULL;
Ciara Loftus7eac9162016-09-30 15:47:03 +0100534 u8 ipv4_set = 0;
535 u8 ipv6_set = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700536
537 /* Get a line of input. */
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530538 if (!unformat_user (input, unformat_line_input, line_input))
Ed Warnickecb9cada2015-12-08 15:45:58 -0700539 return 0;
540
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530541 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
542 {
543 if (unformat (line_input, "del"))
544 is_add = 0;
John Loa43ccae2018-02-13 17:15:23 -0500545 else if (unformat (line_input, "instance %d", &instance))
546 ;
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530547 else
548 if (unformat (line_input, "src %U", unformat_ip4_address, &src.ip4))
549 {
550 num_m_args++;
551 ipv4_set = 1;
552 }
553 else
554 if (unformat (line_input, "dst %U", unformat_ip4_address, &dst.ip4))
555 {
556 num_m_args++;
557 ipv4_set = 1;
558 }
559 else
560 if (unformat (line_input, "src %U", unformat_ip6_address, &src.ip6))
561 {
562 num_m_args++;
563 ipv6_set = 1;
564 }
565 else
566 if (unformat (line_input, "dst %U", unformat_ip6_address, &dst.ip6))
567 {
568 num_m_args++;
569 ipv6_set = 1;
570 }
571 else if (unformat (line_input, "outer-fib-id %d", &outer_fib_id))
572 ;
573 else if (unformat (line_input, "teb"))
John Loa43ccae2018-02-13 17:15:23 -0500574 t_type = GRE_TUNNEL_TYPE_TEB;
575 else if (unformat (line_input, "erspan %d", &session_id))
576 t_type = GRE_TUNNEL_TYPE_ERSPAN;
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530577 else
578 {
579 error = clib_error_return (0, "unknown input `%U'",
580 format_unformat_error, line_input);
581 goto done;
582 }
583 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700584
585 if (num_m_args < 2)
Billy McFalla9a20e72017-02-15 11:39:12 -0500586 {
587 error = clib_error_return (0, "mandatory argument(s) missing");
588 goto done;
589 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700590
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530591 if ((ipv4_set && memcmp (&src.ip4, &dst.ip4, sizeof (src.ip4)) == 0) ||
592 (ipv6_set && memcmp (&src.ip6, &dst.ip6, sizeof (src.ip6)) == 0))
Billy McFalla9a20e72017-02-15 11:39:12 -0500593 {
594 error = clib_error_return (0, "src and dst are identical");
595 goto done;
596 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700597
Ciara Loftus7eac9162016-09-30 15:47:03 +0100598 if (ipv4_set && ipv6_set)
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530599 return clib_error_return (0, "both IPv4 and IPv6 addresses specified");
Ciara Loftus7eac9162016-09-30 15:47:03 +0100600
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530601 if ((ipv4_set && memcmp (&dst.ip4, &zero_addr.ip4, sizeof (dst.ip4)) == 0)
602 || (ipv6_set
603 && memcmp (&dst.ip6, &zero_addr.ip6, sizeof (dst.ip6)) == 0))
Ciara Loftus7eac9162016-09-30 15:47:03 +0100604 {
605 error = clib_error_return (0, "dst address cannot be zero");
606 goto done;
607 }
608
Chris Luke27fe48f2016-04-28 13:44:38 -0400609 memset (a, 0, sizeof (*a));
John Loa43ccae2018-02-13 17:15:23 -0500610 a->is_add = is_add;
Hongjun Ni11bfc2f2016-07-22 18:19:19 +0800611 a->outer_fib_id = outer_fib_id;
John Loa43ccae2018-02-13 17:15:23 -0500612 a->tunnel_type = t_type;
613 a->session_id = session_id;
Ciara Loftus7eac9162016-09-30 15:47:03 +0100614 a->is_ipv6 = ipv6_set;
John Loa43ccae2018-02-13 17:15:23 -0500615 a->instance = instance;
Ciara Loftus7eac9162016-09-30 15:47:03 +0100616 if (!ipv6_set)
617 {
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530618 clib_memcpy (&a->src.ip4, &src.ip4, sizeof (src.ip4));
619 clib_memcpy (&a->dst.ip4, &dst.ip4, sizeof (dst.ip4));
Ciara Loftus7eac9162016-09-30 15:47:03 +0100620 }
621 else
622 {
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530623 clib_memcpy (&a->src.ip6, &src.ip6, sizeof (src.ip6));
624 clib_memcpy (&a->dst.ip6, &dst.ip6, sizeof (dst.ip6));
Ciara Loftus7eac9162016-09-30 15:47:03 +0100625 }
Chris Luke27fe48f2016-04-28 13:44:38 -0400626
John Loa43ccae2018-02-13 17:15:23 -0500627 rv = vnet_gre_add_del_tunnel (a, &sw_if_index);
Chris Luke27fe48f2016-04-28 13:44:38 -0400628
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530629 switch (rv)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700630 {
631 case 0:
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530632 vlib_cli_output (vm, "%U\n", format_vnet_sw_if_index_name,
633 vnet_get_main (), sw_if_index);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700634 break;
John Loa43ccae2018-02-13 17:15:23 -0500635 case VNET_API_ERROR_IF_ALREADY_EXISTS:
Billy McFalla9a20e72017-02-15 11:39:12 -0500636 error = clib_error_return (0, "GRE tunnel already exists...");
637 goto done;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700638 case VNET_API_ERROR_NO_SUCH_FIB:
Billy McFalla9a20e72017-02-15 11:39:12 -0500639 error = clib_error_return (0, "outer fib ID %d doesn't exist\n",
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530640 outer_fib_id);
Billy McFalla9a20e72017-02-15 11:39:12 -0500641 goto done;
John Loa43ccae2018-02-13 17:15:23 -0500642 case VNET_API_ERROR_NO_SUCH_ENTRY:
643 error = clib_error_return (0, "GRE tunnel doesn't exist");
644 goto done;
645 case VNET_API_ERROR_INVALID_SESSION_ID:
646 error = clib_error_return (0, "session ID %d out of range\n",
647 session_id);
648 goto done;
649 case VNET_API_ERROR_INSTANCE_IN_USE:
650 error = clib_error_return (0, "Instance is in use");
651 goto done;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700652 default:
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530653 error =
654 clib_error_return (0, "vnet_gre_add_del_tunnel returned %d", rv);
Billy McFalla9a20e72017-02-15 11:39:12 -0500655 goto done;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700656 }
657
Billy McFalla9a20e72017-02-15 11:39:12 -0500658done:
659 unformat_free (line_input);
660
661 return error;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700662}
663
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530664/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700665VLIB_CLI_COMMAND (create_gre_tunnel_command, static) = {
666 .path = "create gre tunnel",
John Loa43ccae2018-02-13 17:15:23 -0500667 .short_help = "create gre tunnel src <addr> dst <addr> [instance <n>] "
668 "[outer-fib-id <fib>] [teb | erspan <session-id>] [del]",
Ed Warnickecb9cada2015-12-08 15:45:58 -0700669 .function = create_gre_tunnel_command_fn,
670};
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530671/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700672
Chris Luke27fe48f2016-04-28 13:44:38 -0400673static clib_error_t *
674show_gre_tunnel_command_fn (vlib_main_t * vm,
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530675 unformat_input_t * input,
676 vlib_cli_command_t * cmd)
Chris Luke27fe48f2016-04-28 13:44:38 -0400677{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530678 gre_main_t *gm = &gre_main;
679 gre_tunnel_t *t;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100680 u32 ti = ~0;
Chris Luke27fe48f2016-04-28 13:44:38 -0400681
682 if (pool_elts (gm->tunnels) == 0)
683 vlib_cli_output (vm, "No GRE tunnels configured...");
684
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100685 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
686 {
687 if (unformat (input, "%d", &ti))
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530688 ;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100689 else
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530690 break;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100691 }
692
693 if (~0 == ti)
694 {
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530695 /* *INDENT-OFF* */
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100696 pool_foreach (t, gm->tunnels,
697 ({
Neale Rannsb80c5362016-10-08 13:03:40 +0100698 vlib_cli_output (vm, "%U", format_gre_tunnel, t);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100699 }));
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530700 /* *INDENT-ON* */
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100701 }
702 else
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530703 {
704 t = pool_elt_at_index (gm->tunnels, ti);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100705
Neale Rannsb80c5362016-10-08 13:03:40 +0100706 vlib_cli_output (vm, "%U", format_gre_tunnel, t);
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530707 }
Chris Luke27fe48f2016-04-28 13:44:38 -0400708
709 return 0;
710}
711
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530712/* *INDENT-OFF* */
Chris Luke27fe48f2016-04-28 13:44:38 -0400713VLIB_CLI_COMMAND (show_gre_tunnel_command, static) = {
714 .path = "show gre tunnel",
715 .function = show_gre_tunnel_command_fn,
716};
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530717/* *INDENT-ON* */
Chris Luke27fe48f2016-04-28 13:44:38 -0400718
Ed Warnickecb9cada2015-12-08 15:45:58 -0700719/* force inclusion from application's main.c */
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530720clib_error_t *
721gre_interface_init (vlib_main_t * vm)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700722{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530723 fib_node_register_type (FIB_NODE_TYPE_GRE_TUNNEL, &gre_vft);
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100724
Ed Warnickecb9cada2015-12-08 15:45:58 -0700725 return 0;
726}
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530727
728VLIB_INIT_FUNCTION (gre_interface_init);
729
730/*
731 * fd.io coding-style-patch-verification: ON
732 *
733 * Local Variables:
734 * eval: (c-set-style "gnu")
735 * End:
736 */