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Ed Warnickecb9cada2015-12-08 15:45:58 -07001/*
2 * gre.c: gre
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/gre/gre.h>
Neale Rannsb80c5362016-10-08 13:03:40 +010020#include <vnet/adj/adj_midchain.h>
Neale Rannse5b94dd2019-12-31 05:13:14 +000021#include <vnet/tunnel/tunnel_dp.h>
Ed Warnickecb9cada2015-12-08 15:45:58 -070022
Benoît Ganne8e220542019-03-01 14:19:55 +010023extern gre_main_t gre_main;
24
Filip Tehlar0fce11f2019-03-04 09:21:59 -080025#ifndef CLIB_MARCH_VARIANT
Ed Warnickecb9cada2015-12-08 15:45:58 -070026gre_main_t gre_main;
27
Swarup Nayak9ff647a2017-11-27 10:27:43 +053028typedef struct
29{
30 union
31 {
Ed Warnickecb9cada2015-12-08 15:45:58 -070032 ip4_and_gre_header_t ip4_and_gre;
33 u64 as_u64[3];
34 };
35} ip4_and_gre_union_t;
36
Swarup Nayak9ff647a2017-11-27 10:27:43 +053037typedef struct
38{
39 union
40 {
Ciara Loftus7eac9162016-09-30 15:47:03 +010041 ip6_and_gre_header_t ip6_and_gre;
42 u64 as_u64[3];
43 };
44} ip6_and_gre_union_t;
Filip Tehlar0fce11f2019-03-04 09:21:59 -080045#endif /* CLIB_MARCH_VARIANT */
Ciara Loftus7eac9162016-09-30 15:47:03 +010046
Ed Warnickecb9cada2015-12-08 15:45:58 -070047
48/* Packet trace structure */
Swarup Nayak9ff647a2017-11-27 10:27:43 +053049typedef struct
50{
Ed Warnickecb9cada2015-12-08 15:45:58 -070051 /* Tunnel-id / index in tunnel vector */
52 u32 tunnel_id;
53
54 /* pkt length */
55 u32 length;
56
Ciara Loftus7eac9162016-09-30 15:47:03 +010057 /* tunnel ip addresses */
58 ip46_address_t src;
59 ip46_address_t dst;
Ed Warnickecb9cada2015-12-08 15:45:58 -070060} gre_tx_trace_t;
61
Benoît Ganne8e220542019-03-01 14:19:55 +010062extern u8 *format_gre_tx_trace (u8 * s, va_list * args);
63
64#ifndef CLIB_MARCH_VARIANT
65u8 *
Swarup Nayak9ff647a2017-11-27 10:27:43 +053066format_gre_tx_trace (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -070067{
68 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
69 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
Swarup Nayak9ff647a2017-11-27 10:27:43 +053070 gre_tx_trace_t *t = va_arg (*args, gre_tx_trace_t *);
Neale Ranns5e575b12016-10-03 09:40:25 +010071
Ed Warnickecb9cada2015-12-08 15:45:58 -070072 s = format (s, "GRE: tunnel %d len %d src %U dst %U",
John Loa43ccae2018-02-13 17:15:23 -050073 t->tunnel_id, t->length,
Ciara Loftus7eac9162016-09-30 15:47:03 +010074 format_ip46_address, &t->src, IP46_TYPE_ANY,
75 format_ip46_address, &t->dst, IP46_TYPE_ANY);
Ed Warnickecb9cada2015-12-08 15:45:58 -070076 return s;
77}
78
Swarup Nayak9ff647a2017-11-27 10:27:43 +053079u8 *
80format_gre_protocol (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -070081{
82 gre_protocol_t p = va_arg (*args, u32);
Swarup Nayak9ff647a2017-11-27 10:27:43 +053083 gre_main_t *gm = &gre_main;
84 gre_protocol_info_t *pi = gre_get_protocol_info (gm, p);
Ed Warnickecb9cada2015-12-08 15:45:58 -070085
86 if (pi)
87 s = format (s, "%s", pi->name);
88 else
89 s = format (s, "0x%04x", p);
90
91 return s;
92}
93
Swarup Nayak9ff647a2017-11-27 10:27:43 +053094u8 *
95format_gre_header_with_length (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -070096{
Swarup Nayak9ff647a2017-11-27 10:27:43 +053097 gre_main_t *gm = &gre_main;
98 gre_header_t *h = va_arg (*args, gre_header_t *);
Ed Warnickecb9cada2015-12-08 15:45:58 -070099 u32 max_header_bytes = va_arg (*args, u32);
100 gre_protocol_t p = clib_net_to_host_u16 (h->protocol);
Christophe Fontained3c008d2017-10-02 18:10:54 +0200101 u32 indent, header_bytes;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700102
103 header_bytes = sizeof (h[0]);
104 if (max_header_bytes != 0 && header_bytes > max_header_bytes)
105 return format (s, "gre header truncated");
106
107 indent = format_get_indent (s);
108
109 s = format (s, "GRE %U", format_gre_protocol, p);
110
John Loa43ccae2018-02-13 17:15:23 -0500111 if (max_header_bytes != 0 && header_bytes < max_header_bytes)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700112 {
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530113 gre_protocol_info_t *pi = gre_get_protocol_info (gm, p);
114 vlib_node_t *node = vlib_get_node (gm->vlib_main, pi->node_index);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700115 if (node->format_buffer)
116 s = format (s, "\n%U%U",
117 format_white_space, indent,
118 node->format_buffer, (void *) (h + 1),
119 max_header_bytes - header_bytes);
120 }
121
122 return s;
123}
124
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530125u8 *
126format_gre_header (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700127{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530128 gre_header_t *h = va_arg (*args, gre_header_t *);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700129 return format (s, "%U", format_gre_header_with_length, h, 0);
130}
131
132/* Returns gre protocol as an int in host byte order. */
133uword
134unformat_gre_protocol_host_byte_order (unformat_input_t * input,
135 va_list * args)
136{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530137 u16 *result = va_arg (*args, u16 *);
138 gre_main_t *gm = &gre_main;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700139 int i;
140
141 /* Named type. */
142 if (unformat_user (input, unformat_vlib_number_by_name,
143 gm->protocol_info_by_name, &i))
144 {
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530145 gre_protocol_info_t *pi = vec_elt_at_index (gm->protocol_infos, i);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700146 *result = pi->protocol;
147 return 1;
148 }
149
150 return 0;
151}
152
153uword
154unformat_gre_protocol_net_byte_order (unformat_input_t * input,
155 va_list * args)
156{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530157 u16 *result = va_arg (*args, u16 *);
158 if (!unformat_user (input, unformat_gre_protocol_host_byte_order, result))
Ed Warnickecb9cada2015-12-08 15:45:58 -0700159 return 0;
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530160 *result = clib_host_to_net_u16 ((u16) * result);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700161 return 1;
162}
163
164uword
165unformat_gre_header (unformat_input_t * input, va_list * args)
166{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530167 u8 **result = va_arg (*args, u8 **);
168 gre_header_t _h, *h = &_h;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700169 u16 p;
170
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530171 if (!unformat (input, "%U", unformat_gre_protocol_host_byte_order, &p))
Ed Warnickecb9cada2015-12-08 15:45:58 -0700172 return 0;
173
174 h->protocol = clib_host_to_net_u16 (p);
175
176 /* Add header to result. */
177 {
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530178 void *p;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700179 u32 n_bytes = sizeof (h[0]);
180
181 vec_add2 (*result, p, n_bytes);
Damjan Marionf1213b82016-03-13 02:22:06 +0100182 clib_memcpy (p, h, n_bytes);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700183 }
Neale Ranns5e575b12016-10-03 09:40:25 +0100184
Ed Warnickecb9cada2015-12-08 15:45:58 -0700185 return 1;
186}
187
Neale Rannsb80c5362016-10-08 13:03:40 +0100188static int
189gre_proto_from_vnet_link (vnet_link_t link)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700190{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530191 switch (link)
Neale Rannsb80c5362016-10-08 13:03:40 +0100192 {
193 case VNET_LINK_IP4:
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530194 return (GRE_PROTOCOL_ip4);
Neale Rannsb80c5362016-10-08 13:03:40 +0100195 case VNET_LINK_IP6:
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530196 return (GRE_PROTOCOL_ip6);
Neale Rannsb80c5362016-10-08 13:03:40 +0100197 case VNET_LINK_MPLS:
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530198 return (GRE_PROTOCOL_mpls_unicast);
Neale Rannsb80c5362016-10-08 13:03:40 +0100199 case VNET_LINK_ETHERNET:
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530200 return (GRE_PROTOCOL_teb);
Neale Rannsb80c5362016-10-08 13:03:40 +0100201 case VNET_LINK_ARP:
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530202 return (GRE_PROTOCOL_arp);
Florin Corasce1b4c72017-01-26 14:25:34 -0800203 case VNET_LINK_NSH:
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530204 ASSERT (0);
205 break;
Neale Rannsb80c5362016-10-08 13:03:40 +0100206 }
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530207 ASSERT (0);
208 return (GRE_PROTOCOL_ip4);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700209}
210
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530211static u8 *
Neale Rannsb80c5362016-10-08 13:03:40 +0100212gre_build_rewrite (vnet_main_t * vnm,
213 u32 sw_if_index,
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530214 vnet_link_t link_type, const void *dst_address)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700215{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530216 gre_main_t *gm = &gre_main;
Neale Ranns5f8f6172019-04-18 10:23:56 +0000217 const ip46_address_t *dst;
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530218 ip4_and_gre_header_t *h4;
219 ip6_and_gre_header_t *h6;
John Loa43ccae2018-02-13 17:15:23 -0500220 gre_header_t *gre;
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530221 u8 *rewrite = NULL;
Neale Rannsb80c5362016-10-08 13:03:40 +0100222 gre_tunnel_t *t;
223 u32 ti;
Ciara Loftus7eac9162016-09-30 15:47:03 +0100224 u8 is_ipv6;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700225
Neale Ranns5f8f6172019-04-18 10:23:56 +0000226 dst = dst_address;
Neale Rannsb80c5362016-10-08 13:03:40 +0100227 ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
Ed Warnickecb9cada2015-12-08 15:45:58 -0700228
Neale Rannsb80c5362016-10-08 13:03:40 +0100229 if (~0 == ti)
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530230 /* not one of ours */
231 return (0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700232
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530233 t = pool_elt_at_index (gm->tunnels, ti);
Neale Ranns5e575b12016-10-03 09:40:25 +0100234
Ciara Loftus7eac9162016-09-30 15:47:03 +0100235 is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700236
Ciara Loftus7eac9162016-09-30 15:47:03 +0100237 if (!is_ipv6)
238 {
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530239 vec_validate (rewrite, sizeof (*h4) - 1);
240 h4 = (ip4_and_gre_header_t *) rewrite;
John Loa43ccae2018-02-13 17:15:23 -0500241 gre = &h4->gre;
Ciara Loftus7eac9162016-09-30 15:47:03 +0100242 h4->ip4.ip_version_and_header_length = 0x45;
243 h4->ip4.ttl = 254;
244 h4->ip4.protocol = IP_PROTOCOL_GRE;
245 /* fixup ip4 header length and checksum after-the-fact */
246 h4->ip4.src_address.as_u32 = t->tunnel_src.ip4.as_u32;
Neale Ranns5f8f6172019-04-18 10:23:56 +0000247 h4->ip4.dst_address.as_u32 = dst->ip4.as_u32;
Ciara Loftus7eac9162016-09-30 15:47:03 +0100248 h4->ip4.checksum = ip4_header_checksum (&h4->ip4);
249 }
250 else
251 {
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530252 vec_validate (rewrite, sizeof (*h6) - 1);
253 h6 = (ip6_and_gre_header_t *) rewrite;
John Loa43ccae2018-02-13 17:15:23 -0500254 gre = &h6->gre;
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530255 h6->ip6.ip_version_traffic_class_and_flow_label =
256 clib_host_to_net_u32 (6 << 28);
Ciara Loftus7eac9162016-09-30 15:47:03 +0100257 h6->ip6.hop_limit = 255;
258 h6->ip6.protocol = IP_PROTOCOL_GRE;
259 /* fixup ip6 header length and checksum after-the-fact */
260 h6->ip6.src_address.as_u64[0] = t->tunnel_src.ip6.as_u64[0];
261 h6->ip6.src_address.as_u64[1] = t->tunnel_src.ip6.as_u64[1];
Neale Ranns5f8f6172019-04-18 10:23:56 +0000262 h6->ip6.dst_address.as_u64[0] = dst->ip6.as_u64[0];
263 h6->ip6.dst_address.as_u64[1] = dst->ip6.as_u64[1];
Ciara Loftus7eac9162016-09-30 15:47:03 +0100264 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700265
John Loa43ccae2018-02-13 17:15:23 -0500266 if (PREDICT_FALSE (t->type == GRE_TUNNEL_TYPE_ERSPAN))
267 {
268 gre->protocol = clib_host_to_net_u16 (GRE_PROTOCOL_erspan);
269 gre->flags_and_version = clib_host_to_net_u16 (GRE_FLAGS_SEQUENCE);
270 }
271 else
272 gre->protocol =
273 clib_host_to_net_u16 (gre_proto_from_vnet_link (link_type));
274
Neale Rannsb80c5362016-10-08 13:03:40 +0100275 return (rewrite);
Neale Ranns5e575b12016-10-03 09:40:25 +0100276}
277
Neale Rannse5b94dd2019-12-31 05:13:14 +0000278static void
279gre44_fixup (vlib_main_t * vm,
280 const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
281{
282 tunnel_encap_decap_flags_t flags;
283 ip4_and_gre_header_t *ip0;
284
285 ip0 = vlib_buffer_get_current (b0);
286 flags = pointer_to_uword (data);
287
288 /* Fixup the checksum and len fields in the GRE tunnel encap
289 * that was applied at the midchain node */
290 ip0->ip4.length =
291 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
292 tunnel_encap_fixup_4o4 (flags, (ip4_header_t *) (ip0 + 1), &ip0->ip4);
293 ip0->ip4.checksum = ip4_header_checksum (&ip0->ip4);
294}
Ciara Loftus7eac9162016-09-30 15:47:03 +0100295
Neale Rannsdb14f5a2018-01-29 10:43:33 -0800296static void
Neale Rannse5b94dd2019-12-31 05:13:14 +0000297gre64_fixup (vlib_main_t * vm,
298 const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
299{
300 tunnel_encap_decap_flags_t flags;
301 ip4_and_gre_header_t *ip0;
302
303 ip0 = vlib_buffer_get_current (b0);
304 flags = pointer_to_uword (data);
305
306 /* Fixup the checksum and len fields in the GRE tunnel encap
307 * that was applied at the midchain node */
308 ip0->ip4.length =
309 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
310 tunnel_encap_fixup_6o4 (flags, (ip6_header_t *) (ip0 + 1), &ip0->ip4);
311 ip0->ip4.checksum = ip4_header_checksum (&ip0->ip4);
312}
313
314static void
315grex4_fixup (vlib_main_t * vm,
316 const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
Neale Rannsb80c5362016-10-08 13:03:40 +0100317{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530318 ip4_header_t *ip0;
Neale Rannsb80c5362016-10-08 13:03:40 +0100319
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530320 ip0 = vlib_buffer_get_current (b0);
Neale Rannsb80c5362016-10-08 13:03:40 +0100321
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530322 /* Fixup the checksum and len fields in the GRE tunnel encap
323 * that was applied at the midchain node */
324 ip0->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
325 ip0->checksum = ip4_header_checksum (ip0);
Neale Rannsb80c5362016-10-08 13:03:40 +0100326}
327
Neale Rannsdb14f5a2018-01-29 10:43:33 -0800328static void
Neale Rannse5b94dd2019-12-31 05:13:14 +0000329gre46_fixup (vlib_main_t * vm,
330 const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
331{
332 tunnel_encap_decap_flags_t flags;
333 ip6_and_gre_header_t *ip0;
334
335 ip0 = vlib_buffer_get_current (b0);
336 flags = pointer_to_uword (data);
337
338 /* Fixup the payload length field in the GRE tunnel encap that was applied
339 * at the midchain node */
340 ip0->ip6.payload_length =
341 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
Aloys Augustincf86740a2020-07-16 11:01:01 +0200342 sizeof (ip0->ip6));
Neale Rannse5b94dd2019-12-31 05:13:14 +0000343 tunnel_encap_fixup_4o6 (flags, (ip4_header_t *) (ip0 + 1), &ip0->ip6);
344}
345
346static void
347gre66_fixup (vlib_main_t * vm,
348 const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
349{
350 tunnel_encap_decap_flags_t flags;
351 ip6_and_gre_header_t *ip0;
352
353 ip0 = vlib_buffer_get_current (b0);
354 flags = pointer_to_uword (data);
355
356 /* Fixup the payload length field in the GRE tunnel encap that was applied
357 * at the midchain node */
358 ip0->ip6.payload_length =
359 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
Aloys Augustincf86740a2020-07-16 11:01:01 +0200360 sizeof (ip0->ip6));
Neale Rannse5b94dd2019-12-31 05:13:14 +0000361 tunnel_encap_fixup_6o6 (flags, (ip6_header_t *) (ip0 + 1), &ip0->ip6);
362}
363
364static void
365grex6_fixup (vlib_main_t * vm,
366 const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
Ciara Loftus7eac9162016-09-30 15:47:03 +0100367{
Aloys Augustincf86740a2020-07-16 11:01:01 +0200368 ip6_and_gre_header_t *ip0;
Ciara Loftus7eac9162016-09-30 15:47:03 +0100369
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530370 ip0 = vlib_buffer_get_current (b0);
Ciara Loftus7eac9162016-09-30 15:47:03 +0100371
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530372 /* Fixup the payload length field in the GRE tunnel encap that was applied
373 * at the midchain node */
Aloys Augustincf86740a2020-07-16 11:01:01 +0200374 ip0->ip6.payload_length =
Ole Troanda6e11b2018-05-23 11:21:42 +0200375 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
Aloys Augustincf86740a2020-07-16 11:01:01 +0200376 sizeof (ip0->ip6));
Ciara Loftus7eac9162016-09-30 15:47:03 +0100377}
378
Neale Rannse5b94dd2019-12-31 05:13:14 +0000379/**
380 * return the appropriate fixup function given the overlay (link-type) and
381 * underlay (fproto) combination
382 */
383static adj_midchain_fixup_t
384gre_get_fixup (fib_protocol_t fproto, vnet_link_t lt)
385{
386 if (fproto == FIB_PROTOCOL_IP6 && lt == VNET_LINK_IP6)
387 return (gre66_fixup);
388 if (fproto == FIB_PROTOCOL_IP6 && lt == VNET_LINK_IP4)
389 return (gre46_fixup);
390 if (fproto == FIB_PROTOCOL_IP4 && lt == VNET_LINK_IP6)
391 return (gre64_fixup);
392 if (fproto == FIB_PROTOCOL_IP4 && lt == VNET_LINK_IP4)
393 return (gre44_fixup);
394 if (fproto == FIB_PROTOCOL_IP6 && lt == VNET_LINK_ETHERNET)
395 return (grex6_fixup);
396 if (fproto == FIB_PROTOCOL_IP4 && lt == VNET_LINK_ETHERNET)
397 return (grex4_fixup);
398
399 ASSERT (0);
400 return (gre44_fixup);
401}
402
Ciara Loftus7eac9162016-09-30 15:47:03 +0100403void
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530404gre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
Neale Rannsb80c5362016-10-08 13:03:40 +0100405{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530406 gre_main_t *gm = &gre_main;
407 gre_tunnel_t *t;
Neale Ranns521a8d72018-12-06 13:46:49 +0000408 adj_flags_t af;
Neale Ranns521a8d72018-12-06 13:46:49 +0000409 u32 ti;
Ciara Loftus7eac9162016-09-30 15:47:03 +0100410
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530411 ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
412 t = pool_elt_at_index (gm->tunnels, ti);
Neale Ranns521a8d72018-12-06 13:46:49 +0000413 af = ADJ_FLAG_MIDCHAIN_IP_STACK;
414
415 if (VNET_LINK_ETHERNET == adj_get_link_type (ai))
416 af |= ADJ_FLAG_MIDCHAIN_NO_COUNT;
Ciara Loftus7eac9162016-09-30 15:47:03 +0100417
John Loa43ccae2018-02-13 17:15:23 -0500418 adj_nbr_midchain_update_rewrite
Neale Rannse5b94dd2019-12-31 05:13:14 +0000419 (ai, gre_get_fixup (t->tunnel_dst.fp_proto,
420 adj_get_link_type (ai)),
421 uword_to_pointer (t->flags, void *), af,
Neale Ranns5f8f6172019-04-18 10:23:56 +0000422 gre_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai),
423 &t->tunnel_dst.fp_addr));
Neale Rannsb80c5362016-10-08 13:03:40 +0100424
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530425 gre_tunnel_stack (ai);
Neale Rannsb80c5362016-10-08 13:03:40 +0100426}
Neale Ranns5f8f6172019-04-18 10:23:56 +0000427
Neale Ranns14053c92019-12-29 23:55:18 +0000428adj_walk_rc_t
429mgre_mk_complete_walk (adj_index_t ai, void *data)
Neale Ranns5f8f6172019-04-18 10:23:56 +0000430{
Neale Ranns14053c92019-12-29 23:55:18 +0000431 mgre_walk_ctx_t *ctx = data;
Neale Ranns14053c92019-12-29 23:55:18 +0000432
433 adj_nbr_midchain_update_rewrite
Neale Rannse5b94dd2019-12-31 05:13:14 +0000434 (ai, gre_get_fixup (ctx->t->tunnel_dst.fp_proto,
435 adj_get_link_type (ai)),
436 uword_to_pointer (ctx->t->flags, void *),
437 ADJ_FLAG_MIDCHAIN_IP_STACK,
Neale Ranns14053c92019-12-29 23:55:18 +0000438 gre_build_rewrite (vnet_get_main (),
439 ctx->t->sw_if_index,
440 adj_get_link_type (ai),
Neale Ranns03ce4622020-02-03 10:55:09 +0000441 &teib_entry_get_nh (ctx->ne)->fp_addr));
Neale Ranns14053c92019-12-29 23:55:18 +0000442
Neale Ranns03ce4622020-02-03 10:55:09 +0000443 teib_entry_adj_stack (ctx->ne, ai);
Neale Ranns14053c92019-12-29 23:55:18 +0000444
445 return (ADJ_WALK_RC_CONTINUE);
446}
447
448adj_walk_rc_t
449mgre_mk_incomplete_walk (adj_index_t ai, void *data)
450{
451 gre_tunnel_t *t = data;
Neale Ranns14053c92019-12-29 23:55:18 +0000452
Neale Rannse5b94dd2019-12-31 05:13:14 +0000453 adj_nbr_midchain_update_rewrite (ai, gre_get_fixup (t->tunnel_dst.fp_proto,
454 adj_get_link_type (ai)),
455 NULL, ADJ_FLAG_NONE, NULL);
Neale Ranns14053c92019-12-29 23:55:18 +0000456
457 adj_midchain_delegate_unstack (ai);
Neale Ranns5f8f6172019-04-18 10:23:56 +0000458
459 return (ADJ_WALK_RC_CONTINUE);
460}
461
462void
463mgre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
464{
465 gre_main_t *gm = &gre_main;
466 ip_adjacency_t *adj;
Neale Ranns03ce4622020-02-03 10:55:09 +0000467 teib_entry_t *ne;
Neale Ranns5f8f6172019-04-18 10:23:56 +0000468 gre_tunnel_t *t;
Neale Ranns5f8f6172019-04-18 10:23:56 +0000469 u32 ti;
470
471 adj = adj_get (ai);
472 ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
473 t = pool_elt_at_index (gm->tunnels, ti);
Neale Ranns5f8f6172019-04-18 10:23:56 +0000474
Neale Rannse6b83052020-09-17 12:56:47 +0000475 ne = teib_entry_find_46 (sw_if_index,
476 adj->ia_nh_proto, &adj->sub_type.nbr.next_hop);
Neale Ranns5f8f6172019-04-18 10:23:56 +0000477
478 if (NULL == ne)
479 // no NHRP entry to provide the next-hop
480 return;
481
Neale Ranns14053c92019-12-29 23:55:18 +0000482 mgre_walk_ctx_t ctx = {
483 .t = t,
484 .ne = ne
485 };
486 adj_nbr_walk_nh (sw_if_index,
487 adj->ia_nh_proto,
488 &adj->sub_type.nbr.next_hop, mgre_mk_complete_walk, &ctx);
Neale Ranns5f8f6172019-04-18 10:23:56 +0000489}
Filip Tehlar0fce11f2019-03-04 09:21:59 -0800490#endif /* CLIB_MARCH_VARIANT */
Neale Rannsb80c5362016-10-08 13:03:40 +0100491
John Loa43ccae2018-02-13 17:15:23 -0500492typedef enum
493{
John Loa43ccae2018-02-13 17:15:23 -0500494 GRE_ENCAP_NEXT_L2_MIDCHAIN,
495 GRE_ENCAP_N_NEXT,
496} gre_encap_next_t;
497
Neale Rannsb80c5362016-10-08 13:03:40 +0100498/**
John Loa43ccae2018-02-13 17:15:23 -0500499 * @brief TX function. Only called for L2 payload including TEB or ERSPAN.
500 * L3 traffic uses the adj-midchains.
Neale Rannsb80c5362016-10-08 13:03:40 +0100501 */
Neale Ranns07bbaef2020-04-09 07:34:08 -0400502static_always_inline u32
503gre_encap_inline (vlib_main_t * vm,
504 vlib_node_runtime_t * node,
505 vlib_frame_t * frame, gre_tunnel_type_t type)
Neale Ranns5e575b12016-10-03 09:40:25 +0100506{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530507 gre_main_t *gm = &gre_main;
Benoît Ganne8e220542019-03-01 14:19:55 +0100508 u32 *from, n_left_from;
509 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
510 u32 sw_if_index[2] = { ~0, ~0 };
511 const gre_tunnel_t *gt[2] = { 0 };
512 adj_index_t adj_index[2] = { ADJ_INDEX_INVALID, ADJ_INDEX_INVALID };
Neale Ranns5e575b12016-10-03 09:40:25 +0100513
Neale Ranns5e575b12016-10-03 09:40:25 +0100514 from = vlib_frame_vector_args (frame);
Neale Ranns5e575b12016-10-03 09:40:25 +0100515 n_left_from = frame->n_vectors;
Benoît Ganne8e220542019-03-01 14:19:55 +0100516 vlib_get_buffers (vm, from, bufs, n_left_from);
Neale Ranns5e575b12016-10-03 09:40:25 +0100517
Benoît Ganne8e220542019-03-01 14:19:55 +0100518 while (n_left_from >= 2)
Neale Ranns5e575b12016-10-03 09:40:25 +0100519 {
Neale Ranns5e575b12016-10-03 09:40:25 +0100520
Benoît Ganne8e220542019-03-01 14:19:55 +0100521 if (PREDICT_FALSE
522 (sw_if_index[0] != vnet_buffer (b[0])->sw_if_index[VLIB_TX]))
John Loa43ccae2018-02-13 17:15:23 -0500523 {
Benoît Ganne8e220542019-03-01 14:19:55 +0100524 const vnet_hw_interface_t *hi;
525 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
526 hi = vnet_get_sup_hw_interface (gm->vnet_main, sw_if_index[0]);
527 gt[0] = &gm->tunnels[hi->dev_instance];
528 adj_index[0] = gt[0]->l2_adj_index;
529 }
530 if (PREDICT_FALSE
531 (sw_if_index[1] != vnet_buffer (b[1])->sw_if_index[VLIB_TX]))
532 {
533 const vnet_hw_interface_t *hi;
534 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
535 hi = vnet_get_sup_hw_interface (gm->vnet_main, sw_if_index[1]);
536 gt[1] = &gm->tunnels[hi->dev_instance];
537 adj_index[1] = gt[1]->l2_adj_index;
John Loa43ccae2018-02-13 17:15:23 -0500538 }
Neale Ranns5e575b12016-10-03 09:40:25 +0100539
Benoît Ganne8e220542019-03-01 14:19:55 +0100540 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = adj_index[0];
541 vnet_buffer (b[1])->ip.adj_index[VLIB_TX] = adj_index[1];
542
Neale Ranns07bbaef2020-04-09 07:34:08 -0400543 if (type == GRE_TUNNEL_TYPE_ERSPAN)
Neale Ranns5e575b12016-10-03 09:40:25 +0100544 {
Benoît Ganne8e220542019-03-01 14:19:55 +0100545 /* Encap GRE seq# and ERSPAN type II header */
546 erspan_t2_t *h0;
547 u32 seq_num;
548 u64 hdr;
549 vlib_buffer_advance (b[0], -sizeof (erspan_t2_t));
550 h0 = vlib_buffer_get_current (b[0]);
551 seq_num = clib_atomic_fetch_add (&gt[0]->gre_sn->seq_num, 1);
552 hdr = clib_host_to_net_u64 (ERSPAN_HDR2);
553 h0->seq_num = clib_host_to_net_u32 (seq_num);
554 h0->t2_u64 = hdr;
555 h0->t2.cos_en_t_session |= clib_host_to_net_u16 (gt[0]->session_id);
556 }
Neale Ranns07bbaef2020-04-09 07:34:08 -0400557 if (type == GRE_TUNNEL_TYPE_ERSPAN)
Benoît Ganne8e220542019-03-01 14:19:55 +0100558 {
559 /* Encap GRE seq# and ERSPAN type II header */
560 erspan_t2_t *h0;
561 u32 seq_num;
562 u64 hdr;
563 vlib_buffer_advance (b[1], -sizeof (erspan_t2_t));
564 h0 = vlib_buffer_get_current (b[1]);
565 seq_num = clib_atomic_fetch_add (&gt[1]->gre_sn->seq_num, 1);
566 hdr = clib_host_to_net_u64 (ERSPAN_HDR2);
567 h0->seq_num = clib_host_to_net_u32 (seq_num);
568 h0->t2_u64 = hdr;
569 h0->t2.cos_en_t_session |= clib_host_to_net_u16 (gt[1]->session_id);
Neale Ranns5e575b12016-10-03 09:40:25 +0100570 }
571
Benoît Ganne8e220542019-03-01 14:19:55 +0100572 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
573 {
574 gre_tx_trace_t *tr = vlib_add_trace (vm, node,
575 b[0], sizeof (*tr));
576 tr->tunnel_id = gt[0] - gm->tunnels;
577 tr->src = gt[0]->tunnel_src;
578 tr->dst = gt[0]->tunnel_dst.fp_addr;
579 tr->length = vlib_buffer_length_in_chain (vm, b[0]);
580 }
581 if (PREDICT_FALSE (b[1]->flags & VLIB_BUFFER_IS_TRACED))
582 {
583 gre_tx_trace_t *tr = vlib_add_trace (vm, node,
584 b[1], sizeof (*tr));
585 tr->tunnel_id = gt[1] - gm->tunnels;
586 tr->src = gt[1]->tunnel_src;
587 tr->dst = gt[1]->tunnel_dst.fp_addr;
588 tr->length = vlib_buffer_length_in_chain (vm, b[1]);
589 }
590
591 b += 2;
592 n_left_from -= 2;
Neale Ranns5e575b12016-10-03 09:40:25 +0100593 }
594
Benoît Ganne8e220542019-03-01 14:19:55 +0100595 while (n_left_from >= 1)
596 {
597
598 if (PREDICT_FALSE
599 (sw_if_index[0] != vnet_buffer (b[0])->sw_if_index[VLIB_TX]))
600 {
601 const vnet_hw_interface_t *hi;
602 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
603 hi = vnet_get_sup_hw_interface (gm->vnet_main, sw_if_index[0]);
604 gt[0] = &gm->tunnels[hi->dev_instance];
605 adj_index[0] = gt[0]->l2_adj_index;
606 }
607
608 vnet_buffer (b[0])->ip.adj_index[VLIB_TX] = adj_index[0];
609
Neale Ranns07bbaef2020-04-09 07:34:08 -0400610 if (type == GRE_TUNNEL_TYPE_ERSPAN)
Benoît Ganne8e220542019-03-01 14:19:55 +0100611 {
612 /* Encap GRE seq# and ERSPAN type II header */
613 erspan_t2_t *h0;
614 u32 seq_num;
615 u64 hdr;
Neale Ranns07bbaef2020-04-09 07:34:08 -0400616 ASSERT (gt[0]->type == GRE_TUNNEL_TYPE_ERSPAN);
Benoît Ganne8e220542019-03-01 14:19:55 +0100617 vlib_buffer_advance (b[0], -sizeof (erspan_t2_t));
618 h0 = vlib_buffer_get_current (b[0]);
619 seq_num = clib_atomic_fetch_add (&gt[0]->gre_sn->seq_num, 1);
620 hdr = clib_host_to_net_u64 (ERSPAN_HDR2);
621 h0->seq_num = clib_host_to_net_u32 (seq_num);
622 h0->t2_u64 = hdr;
623 h0->t2.cos_en_t_session |= clib_host_to_net_u16 (gt[0]->session_id);
624 }
625
626 if (PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED))
627 {
628 gre_tx_trace_t *tr = vlib_add_trace (vm, node,
629 b[0], sizeof (*tr));
630 tr->tunnel_id = gt[0] - gm->tunnels;
631 tr->src = gt[0]->tunnel_src;
632 tr->dst = gt[0]->tunnel_dst.fp_addr;
633 tr->length = vlib_buffer_length_in_chain (vm, b[0]);
634 }
635
636 b += 1;
637 n_left_from -= 1;
638 }
639
640 vlib_buffer_enqueue_to_single_next (vm, node, from,
641 GRE_ENCAP_NEXT_L2_MIDCHAIN,
642 frame->n_vectors);
643
John Loa43ccae2018-02-13 17:15:23 -0500644 vlib_node_increment_counter (vm, node->node_index,
Neale Ranns5e575b12016-10-03 09:40:25 +0100645 GRE_ERROR_PKTS_ENCAP, frame->n_vectors);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700646
647 return frame->n_vectors;
648}
649
John Loa43ccae2018-02-13 17:15:23 -0500650static char *gre_error_strings[] = {
651#define gre_error(n,s) s,
652#include "error.def"
653#undef gre_error
654};
Neale Ranns177bbdc2016-11-15 09:46:51 +0000655
Neale Ranns07bbaef2020-04-09 07:34:08 -0400656VLIB_NODE_FN (gre_teb_encap_node) (vlib_main_t * vm,
657 vlib_node_runtime_t * node,
658 vlib_frame_t * frame)
Neale Ranns177bbdc2016-11-15 09:46:51 +0000659{
Neale Ranns07bbaef2020-04-09 07:34:08 -0400660 return (gre_encap_inline (vm, node, frame, GRE_TUNNEL_TYPE_TEB));
661}
662
663VLIB_NODE_FN (gre_erspan_encap_node) (vlib_main_t * vm,
664 vlib_node_runtime_t * node,
665 vlib_frame_t * frame)
666{
667 return (gre_encap_inline (vm, node, frame, GRE_TUNNEL_TYPE_ERSPAN));
668}
669
670/* *INDENT-OFF* */
671VLIB_REGISTER_NODE (gre_teb_encap_node) =
672{
673 .name = "gre-teb-encap",
674 .vector_size = sizeof (u32),
675 .format_trace = format_gre_tx_trace,
676 .type = VLIB_NODE_TYPE_INTERNAL,
677 .n_errors = GRE_N_ERROR,
678 .error_strings = gre_error_strings,
679 .n_next_nodes = GRE_ENCAP_N_NEXT,
680 .next_nodes = {
681 [GRE_ENCAP_NEXT_L2_MIDCHAIN] = "adj-l2-midchain",
682 },
683};
684VLIB_REGISTER_NODE (gre_erspan_encap_node) =
685{
686 .name = "gre-erspan-encap",
John Loa43ccae2018-02-13 17:15:23 -0500687 .vector_size = sizeof (u32),
688 .format_trace = format_gre_tx_trace,
689 .type = VLIB_NODE_TYPE_INTERNAL,
690 .n_errors = GRE_N_ERROR,
691 .error_strings = gre_error_strings,
692 .n_next_nodes = GRE_ENCAP_N_NEXT,
693 .next_nodes = {
John Loa43ccae2018-02-13 17:15:23 -0500694 [GRE_ENCAP_NEXT_L2_MIDCHAIN] = "adj-l2-midchain",
695 },
696};
John Loa43ccae2018-02-13 17:15:23 -0500697/* *INDENT-ON* */
Neale Ranns177bbdc2016-11-15 09:46:51 +0000698
Benoît Ganne8e220542019-03-01 14:19:55 +0100699#ifndef CLIB_MARCH_VARIANT
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530700static u8 *
701format_gre_tunnel_name (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700702{
703 u32 dev_instance = va_arg (*args, u32);
John Loa43ccae2018-02-13 17:15:23 -0500704 gre_main_t *gm = &gre_main;
705 gre_tunnel_t *t;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700706
John Loa43ccae2018-02-13 17:15:23 -0500707 if (dev_instance >= vec_len (gm->tunnels))
708 return format (s, "<improperly-referenced>");
709
710 t = pool_elt_at_index (gm->tunnels, dev_instance);
711 return format (s, "gre%d", t->user_instance);
Neale Ranns177bbdc2016-11-15 09:46:51 +0000712}
713
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530714static u8 *
715format_gre_device (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700716{
717 u32 dev_instance = va_arg (*args, u32);
718 CLIB_UNUSED (int verbose) = va_arg (*args, int);
719
720 s = format (s, "GRE tunnel: id %d\n", dev_instance);
721 return s;
722}
723
Neale Rannsc87b66c2019-02-07 07:26:12 -0800724static int
725gre_tunnel_desc (u32 sw_if_index,
726 ip46_address_t * src, ip46_address_t * dst, u8 * is_l2)
727{
728 gre_main_t *gm = &gre_main;
729 gre_tunnel_t *t;
730 u32 ti;
731
732 ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
733
734 if (~0 == ti)
735 /* not one of ours */
736 return -1;
737
738 t = pool_elt_at_index (gm->tunnels, ti);
739
740 *src = t->tunnel_src;
741 *dst = t->tunnel_dst.fp_addr;
742 *is_l2 = t->type == GRE_TUNNEL_TYPE_TEB;
743
744 return (0);
745}
746
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530747/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700748VNET_DEVICE_CLASS (gre_device_class) = {
749 .name = "GRE tunnel device",
750 .format_device_name = format_gre_tunnel_name,
751 .format_device = format_gre_device,
752 .format_tx_trace = format_gre_tx_trace,
Chris Luke393490e2016-05-06 17:09:09 -0400753 .admin_up_down_function = gre_interface_admin_up_down,
Neale Rannsc87b66c2019-02-07 07:26:12 -0800754 .ip_tun_desc = gre_tunnel_desc,
Ed Warnickecb9cada2015-12-08 15:45:58 -0700755#ifdef SOON
756 .clear counter = 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700757#endif
758};
Neale Ranns177bbdc2016-11-15 09:46:51 +0000759
Ed Warnickecb9cada2015-12-08 15:45:58 -0700760VNET_HW_INTERFACE_CLASS (gre_hw_interface_class) = {
761 .name = "GRE",
762 .format_header = format_gre_header_with_length,
763 .unformat_header = unformat_gre_header,
Neale Rannsb80c5362016-10-08 13:03:40 +0100764 .build_rewrite = gre_build_rewrite,
765 .update_adjacency = gre_update_adj,
766 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
Ed Warnickecb9cada2015-12-08 15:45:58 -0700767};
Neale Ranns5f8f6172019-04-18 10:23:56 +0000768
769VNET_HW_INTERFACE_CLASS (mgre_hw_interface_class) = {
770 .name = "mGRE",
771 .format_header = format_gre_header_with_length,
772 .unformat_header = unformat_gre_header,
773 .build_rewrite = gre_build_rewrite,
774 .update_adjacency = mgre_update_adj,
775 .flags = VNET_HW_INTERFACE_CLASS_FLAG_NBMA,
776};
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530777/* *INDENT-ON* */
Benoît Ganne8e220542019-03-01 14:19:55 +0100778#endif /* CLIB_MARCH_VARIANT */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700779
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530780static void
781add_protocol (gre_main_t * gm, gre_protocol_t protocol, char *protocol_name)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700782{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530783 gre_protocol_info_t *pi;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700784 u32 i;
785
786 vec_add2 (gm->protocol_infos, pi, 1);
787 i = pi - gm->protocol_infos;
788
789 pi->name = protocol_name;
790 pi->protocol = protocol;
791 pi->next_index = pi->node_index = ~0;
792
793 hash_set (gm->protocol_info_by_protocol, protocol, i);
794 hash_set_mem (gm->protocol_info_by_name, pi->name, i);
795}
796
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530797static clib_error_t *
798gre_init (vlib_main_t * vm)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700799{
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530800 gre_main_t *gm = &gre_main;
801 clib_error_t *error;
802 ip_main_t *im = &ip_main;
803 ip_protocol_info_t *pi;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700804
Dave Barachb7b92992018-10-17 10:38:51 -0400805 clib_memset (gm, 0, sizeof (gm[0]));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700806 gm->vlib_main = vm;
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530807 gm->vnet_main = vnet_get_main ();
Ed Warnickecb9cada2015-12-08 15:45:58 -0700808
809 if ((error = vlib_call_init_function (vm, ip_main_init)))
810 return error;
811
812 if ((error = vlib_call_init_function (vm, ip4_lookup_init)))
813 return error;
814
Ciara Loftus7eac9162016-09-30 15:47:03 +0100815 if ((error = vlib_call_init_function (vm, ip6_lookup_init)))
816 return error;
817
Ed Warnickecb9cada2015-12-08 15:45:58 -0700818 /* Set up the ip packet generator */
819 pi = ip_get_protocol_info (im, IP_PROTOCOL_GRE);
820 pi->format_header = format_gre_header;
821 pi->unformat_pg_edit = unformat_pg_gre_header;
822
823 gm->protocol_info_by_name = hash_create_string (0, sizeof (uword));
824 gm->protocol_info_by_protocol = hash_create (0, sizeof (uword));
Neale Ranns33ce60d2017-12-14 08:51:32 -0800825 gm->tunnel_by_key4 =
826 hash_create_mem (0, sizeof (gre_tunnel_key4_t), sizeof (uword));
827 gm->tunnel_by_key6 =
828 hash_create_mem (0, sizeof (gre_tunnel_key6_t), sizeof (uword));
John Loa43ccae2018-02-13 17:15:23 -0500829 gm->seq_num_by_key =
830 hash_create_mem (0, sizeof (gre_sn_key_t), sizeof (uword));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700831
832#define _(n,s) add_protocol (gm, GRE_PROTOCOL_##s, #s);
833 foreach_gre_protocol
834#undef _
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530835 return vlib_call_init_function (vm, gre_input_init);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700836}
837
838VLIB_INIT_FUNCTION (gre_init);
839
Swarup Nayak9ff647a2017-11-27 10:27:43 +0530840/*
841 * fd.io coding-style-patch-verification: ON
842 *
843 * Local Variables:
844 * eval: (c-set-style "gnu")
845 * End:
846 */