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Ed Warnickecb9cada2015-12-08 15:45:58 -07001/*
Florin Corase127a7e2016-02-18 22:20:01 +01002 * Copyright (c) 2016 Cisco and/or its affiliates.
Ed Warnickecb9cada2015-12-08 15:45:58 -07003 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
Florin Corasff0bf132016-09-05 19:30:35 +020015/**
16 * @file
17 * @brief L2 LISP-GPE decap code.
18 *
19 */
Ed Warnickecb9cada2015-12-08 15:45:58 -070020#include <vlib/vlib.h>
21#include <vnet/pg/pg.h>
22#include <vnet/lisp-gpe/lisp_gpe.h>
23
Florin Corase127a7e2016-02-18 22:20:01 +010024typedef struct
25{
Ed Warnickecb9cada2015-12-08 15:45:58 -070026 u32 next_index;
27 u32 tunnel_index;
28 u32 error;
29 lisp_gpe_header_t h;
30} lisp_gpe_rx_trace_t;
31
Florin Corase127a7e2016-02-18 22:20:01 +010032static u8 *
33format_lisp_gpe_rx_trace (u8 * s, va_list * args)
Ed Warnickecb9cada2015-12-08 15:45:58 -070034{
35 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
36 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
Florin Coras220beac2016-08-16 23:04:00 +020037 lisp_gpe_rx_trace_t *t = va_arg (*args, lisp_gpe_rx_trace_t *);
Ed Warnickecb9cada2015-12-08 15:45:58 -070038
39 if (t->tunnel_index != ~0)
40 {
Florin Corase127a7e2016-02-18 22:20:01 +010041 s = format (s, "LISP-GPE: tunnel %d next %d error %d", t->tunnel_index,
Florin Coras220beac2016-08-16 23:04:00 +020042 t->next_index, t->error);
Ed Warnickecb9cada2015-12-08 15:45:58 -070043 }
44 else
45 {
Florin Corase127a7e2016-02-18 22:20:01 +010046 s = format (s, "LISP-GPE: no tunnel next %d error %d\n", t->next_index,
Florin Coras220beac2016-08-16 23:04:00 +020047 t->error);
Ed Warnickecb9cada2015-12-08 15:45:58 -070048 }
Florin Corase127a7e2016-02-18 22:20:01 +010049 s = format (s, "\n %U", format_lisp_gpe_header_with_length, &t->h,
Florin Coras220beac2016-08-16 23:04:00 +020050 (u32) sizeof (t->h) /* max size */ );
Ed Warnickecb9cada2015-12-08 15:45:58 -070051 return s;
52}
53
Florin Coras220beac2016-08-16 23:04:00 +020054static u32 next_proto_to_next_index[LISP_GPE_NEXT_PROTOS] = {
55 LISP_GPE_INPUT_NEXT_DROP,
56 LISP_GPE_INPUT_NEXT_IP4_INPUT,
57 LISP_GPE_INPUT_NEXT_IP6_INPUT,
58 LISP_GPE_INPUT_NEXT_L2_INPUT,
59 LISP_GPE_INPUT_NEXT_DROP
Florin Corase127a7e2016-02-18 22:20:01 +010060};
61
Florin Coras1a1adc72016-07-22 01:45:30 +020062always_inline u32
Florin Corase127a7e2016-02-18 22:20:01 +010063next_protocol_to_next_index (lisp_gpe_header_t * lgh, u8 * next_header)
64{
Florin Corasc7e91e42016-05-02 18:26:26 +020065 /* lisp-gpe router */
Florin Coras220beac2016-08-16 23:04:00 +020066 if (PREDICT_TRUE ((lgh->flags & LISP_GPE_FLAGS_P)
67 && lgh->next_protocol < LISP_GPE_NEXT_PROTOS))
Florin Corasc7e91e42016-05-02 18:26:26 +020068 return next_proto_to_next_index[lgh->next_protocol];
Florin Coras1a1adc72016-07-22 01:45:30 +020069 /* legacy lisp router */
Florin Corasc7e91e42016-05-02 18:26:26 +020070 else if ((lgh->flags & LISP_GPE_FLAGS_P) == 0)
Florin Corase127a7e2016-02-18 22:20:01 +010071 {
Florin Coras220beac2016-08-16 23:04:00 +020072 ip4_header_t *iph = (ip4_header_t *) next_header;
Florin Corase127a7e2016-02-18 22:20:01 +010073 if ((iph->ip_version_and_header_length & 0xF0) == 0x40)
Florin Coras220beac2016-08-16 23:04:00 +020074 return LISP_GPE_INPUT_NEXT_IP4_INPUT;
Florin Corase127a7e2016-02-18 22:20:01 +010075 else if ((iph->ip_version_and_header_length & 0xF0) == 0x60)
Florin Coras220beac2016-08-16 23:04:00 +020076 return LISP_GPE_INPUT_NEXT_IP6_INPUT;
Florin Corase127a7e2016-02-18 22:20:01 +010077 else
Florin Coras220beac2016-08-16 23:04:00 +020078 return LISP_GPE_INPUT_NEXT_DROP;
Florin Corase127a7e2016-02-18 22:20:01 +010079 }
Florin Corase127a7e2016-02-18 22:20:01 +010080 else
81 return LISP_GPE_INPUT_NEXT_DROP;
82}
83
Florin Coras1a1adc72016-07-22 01:45:30 +020084always_inline tunnel_lookup_t *
85next_index_to_iface (lisp_gpe_main_t * lgm, u32 next_index)
86{
87 if (LISP_GPE_INPUT_NEXT_IP4_INPUT == next_index
88 || LISP_GPE_INPUT_NEXT_IP6_INPUT == next_index)
89 return &lgm->l3_ifaces;
90 else if (LISP_GPE_INPUT_NEXT_L2_INPUT == next_index)
91 return &lgm->l2_ifaces;
Florin Coras263440e2017-02-22 23:38:08 -080092 else if (LISP_GPE_INPUT_NEXT_NSH_INPUT == next_index)
93 return &lgm->nsh_ifaces;
Florin Coras220beac2016-08-16 23:04:00 +020094 clib_warning ("next_index not associated to an interface!");
Florin Coras1a1adc72016-07-22 01:45:30 +020095 return 0;
96}
97
Florin Coras0f6b7962016-06-21 22:32:47 +020098static_always_inline void
Florin Coras220beac2016-08-16 23:04:00 +020099incr_decap_stats (vnet_main_t * vnm, u32 cpu_index, u32 length,
100 u32 sw_if_index, u32 * last_sw_if_index, u32 * n_packets,
101 u32 * n_bytes)
Florin Coras0f6b7962016-06-21 22:32:47 +0200102{
Florin Coras220beac2016-08-16 23:04:00 +0200103 vnet_interface_main_t *im;
Florin Coras0f6b7962016-06-21 22:32:47 +0200104
Florin Coras220beac2016-08-16 23:04:00 +0200105 if (PREDICT_TRUE (sw_if_index == *last_sw_if_index))
Florin Coras0f6b7962016-06-21 22:32:47 +0200106 {
107 *n_packets += 1;
108 *n_bytes += length;
109 }
110 else
111 {
Florin Coras220beac2016-08-16 23:04:00 +0200112 if (PREDICT_TRUE (*last_sw_if_index != ~0))
113 {
114 im = &vnm->interface_main;
Florin Coras0f6b7962016-06-21 22:32:47 +0200115
Florin Coras220beac2016-08-16 23:04:00 +0200116 vlib_increment_combined_counter (im->combined_sw_if_counters +
117 VNET_INTERFACE_COUNTER_RX,
118 cpu_index, *last_sw_if_index,
119 *n_packets, *n_bytes);
120 }
Florin Coras0f6b7962016-06-21 22:32:47 +0200121 *last_sw_if_index = sw_if_index;
122 *n_packets = 1;
123 *n_bytes = length;
124 }
125}
126
Florin Corasff0bf132016-09-05 19:30:35 +0200127/**
128 * @brief LISP-GPE decap dispatcher.
129 * @node lisp_gpe_input_inline
130 *
131 * LISP-GPE decap dispatcher.
132 *
133 * Decaps IP-UDP-LISP-GPE header and based on the next protocol and in the
134 * GPE header and the vni decides the next node to forward the packet to.
135 *
136 * @param[in] vm vlib_main_t corresponding to current thread.
137 * @param[in] node vlib_node_runtime_t data for this node.
138 * @param[in] frame vlib_frame_t whose contents should be dispatched.
139 *
140 * @return number of vectors in frame.
141 */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700142static uword
Florin Coras02655bd2016-04-26 00:17:24 +0200143lisp_gpe_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
Florin Coras220beac2016-08-16 23:04:00 +0200144 vlib_frame_t * from_frame, u8 is_v4)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700145{
Florin Coras220beac2016-08-16 23:04:00 +0200146 u32 n_left_from, next_index, *from, *to_next, cpu_index;
Florin Coras0f6b7962016-06-21 22:32:47 +0200147 u32 n_bytes = 0, n_packets = 0, last_sw_if_index = ~0, drops = 0;
Florin Coras220beac2016-08-16 23:04:00 +0200148 lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
Ed Warnickecb9cada2015-12-08 15:45:58 -0700149
Florin Coras220beac2016-08-16 23:04:00 +0200150 cpu_index = os_get_cpu_number ();
Ed Warnickecb9cada2015-12-08 15:45:58 -0700151 from = vlib_frame_vector_args (from_frame);
152 n_left_from = from_frame->n_vectors;
153
154 next_index = node->cached_next_index;
155
156 while (n_left_from > 0)
157 {
158 u32 n_left_to_next;
159
Florin Coras220beac2016-08-16 23:04:00 +0200160 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700161
Ed Warnickecb9cada2015-12-08 15:45:58 -0700162 while (n_left_from >= 4 && n_left_to_next >= 2)
Florin Coras220beac2016-08-16 23:04:00 +0200163 {
164 u32 bi0, bi1;
165 vlib_buffer_t *b0, *b1;
166 ip4_udp_lisp_gpe_header_t *iul4_0, *iul4_1;
167 ip6_udp_lisp_gpe_header_t *iul6_0, *iul6_1;
168 lisp_gpe_header_t *lh0, *lh1;
169 u32 next0, next1, error0, error1;
170 uword *si0, *si1;
171 tunnel_lookup_t *tl0, *tl1;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700172
Florin Coras220beac2016-08-16 23:04:00 +0200173 /* Prefetch next iteration. */
174 {
175 vlib_buffer_t *p2, *p3;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700176
Florin Coras220beac2016-08-16 23:04:00 +0200177 p2 = vlib_get_buffer (vm, from[2]);
178 p3 = vlib_get_buffer (vm, from[3]);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700179
Florin Coras220beac2016-08-16 23:04:00 +0200180 vlib_prefetch_buffer_header (p2, LOAD);
181 vlib_prefetch_buffer_header (p3, LOAD);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700182
Florin Coras220beac2016-08-16 23:04:00 +0200183 CLIB_PREFETCH (p2->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
184 CLIB_PREFETCH (p3->data, 2 * CLIB_CACHE_LINE_BYTES, LOAD);
185 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700186
Florin Coras220beac2016-08-16 23:04:00 +0200187 bi0 = from[0];
188 bi1 = from[1];
189 to_next[0] = bi0;
190 to_next[1] = bi1;
191 from += 2;
192 to_next += 2;
193 n_left_to_next -= 2;
194 n_left_from -= 2;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700195
Florin Coras220beac2016-08-16 23:04:00 +0200196 b0 = vlib_get_buffer (vm, bi0);
197 b1 = vlib_get_buffer (vm, bi1);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700198
Florin Coras220beac2016-08-16 23:04:00 +0200199 /* udp leaves current_data pointing at the lisp header */
200 if (is_v4)
201 {
202 vlib_buffer_advance (b0,
203 -(word) (sizeof (udp_header_t) +
204 sizeof (ip4_header_t)));
205 vlib_buffer_advance (b1,
206 -(word) (sizeof (udp_header_t) +
207 sizeof (ip4_header_t)));
Florin Corase127a7e2016-02-18 22:20:01 +0100208
Florin Coras220beac2016-08-16 23:04:00 +0200209 iul4_0 = vlib_buffer_get_current (b0);
210 iul4_1 = vlib_buffer_get_current (b1);
Florin Corase127a7e2016-02-18 22:20:01 +0100211
Florin Coras220beac2016-08-16 23:04:00 +0200212 /* pop (ip, udp, lisp-gpe) */
213 vlib_buffer_advance (b0, sizeof (*iul4_0));
214 vlib_buffer_advance (b1, sizeof (*iul4_1));
Florin Coras02655bd2016-04-26 00:17:24 +0200215
Florin Coras220beac2016-08-16 23:04:00 +0200216 lh0 = &iul4_0->lisp;
217 lh1 = &iul4_1->lisp;
218 }
219 else
220 {
221 vlib_buffer_advance (b0,
222 -(word) (sizeof (udp_header_t) +
223 sizeof (ip6_header_t)));
224 vlib_buffer_advance (b1,
225 -(word) (sizeof (udp_header_t) +
226 sizeof (ip6_header_t)));
Florin Coras02655bd2016-04-26 00:17:24 +0200227
Florin Coras220beac2016-08-16 23:04:00 +0200228 iul6_0 = vlib_buffer_get_current (b0);
229 iul6_1 = vlib_buffer_get_current (b1);
Florin Coras02655bd2016-04-26 00:17:24 +0200230
Florin Coras220beac2016-08-16 23:04:00 +0200231 /* pop (ip, udp, lisp-gpe) */
232 vlib_buffer_advance (b0, sizeof (*iul6_0));
233 vlib_buffer_advance (b1, sizeof (*iul6_1));
Florin Coras02655bd2016-04-26 00:17:24 +0200234
Florin Coras220beac2016-08-16 23:04:00 +0200235 lh0 = &iul6_0->lisp;
236 lh1 = &iul6_1->lisp;
237 }
Florin Corase127a7e2016-02-18 22:20:01 +0100238
Florin Coras220beac2016-08-16 23:04:00 +0200239 /* determine next_index from lisp-gpe header */
240 next0 = next_protocol_to_next_index (lh0,
241 vlib_buffer_get_current (b0));
242 next1 = next_protocol_to_next_index (lh1,
243 vlib_buffer_get_current (b1));
Florin Corase127a7e2016-02-18 22:20:01 +0100244
Florin Coras220beac2016-08-16 23:04:00 +0200245 /* determine if tunnel is l2 or l3 */
246 tl0 = next_index_to_iface (lgm, next0);
247 tl1 = next_index_to_iface (lgm, next1);
Florin Corase127a7e2016-02-18 22:20:01 +0100248
Florin Coras220beac2016-08-16 23:04:00 +0200249 /* map iid/vni to lisp-gpe sw_if_index which is used by ipx_input to
250 * decide the rx vrf and the input features to be applied */
251 si0 = hash_get (tl0->sw_if_index_by_vni,
252 clib_net_to_host_u32 (lh0->iid));
253 si1 = hash_get (tl1->sw_if_index_by_vni,
254 clib_net_to_host_u32 (lh1->iid));
Florin Corase127a7e2016-02-18 22:20:01 +0100255
Florin Coras1a1adc72016-07-22 01:45:30 +0200256
Florin Coras220beac2016-08-16 23:04:00 +0200257 /* Required to make the l2 tag push / pop code work on l2 subifs */
258 vnet_update_l2_len (b0);
259 vnet_update_l2_len (b1);
Florin Coras1a1adc72016-07-22 01:45:30 +0200260
Florin Coras220beac2016-08-16 23:04:00 +0200261 if (si0)
262 {
263 incr_decap_stats (lgm->vnet_main, cpu_index,
264 vlib_buffer_length_in_chain (vm, b0), si0[0],
265 &last_sw_if_index, &n_packets, &n_bytes);
266 vnet_buffer (b0)->sw_if_index[VLIB_RX] = si0[0];
267 error0 = 0;
268 }
269 else
270 {
271 next0 = LISP_GPE_INPUT_NEXT_DROP;
272 error0 = LISP_GPE_ERROR_NO_TUNNEL;
273 drops++;
274 }
Florin Corase127a7e2016-02-18 22:20:01 +0100275
Florin Coras220beac2016-08-16 23:04:00 +0200276 if (si1)
277 {
278 incr_decap_stats (lgm->vnet_main, cpu_index,
279 vlib_buffer_length_in_chain (vm, b1), si1[0],
280 &last_sw_if_index, &n_packets, &n_bytes);
281 vnet_buffer (b1)->sw_if_index[VLIB_RX] = si1[0];
282 error1 = 0;
283 }
284 else
285 {
286 next1 = LISP_GPE_INPUT_NEXT_DROP;
287 error1 = LISP_GPE_ERROR_NO_TUNNEL;
288 drops++;
289 }
Florin Coras577c3552016-04-21 00:45:40 +0200290
Florin Coras220beac2016-08-16 23:04:00 +0200291 b0->error = error0 ? node->errors[error0] : 0;
292 b1->error = error1 ? node->errors[error1] : 0;
Florin Corase127a7e2016-02-18 22:20:01 +0100293
Florin Coras220beac2016-08-16 23:04:00 +0200294 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
295 {
296 lisp_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b0,
297 sizeof (*tr));
298 tr->next_index = next0;
299 tr->error = error0;
300 tr->h = lh0[0];
301 }
Florin Corase127a7e2016-02-18 22:20:01 +0100302
Florin Coras220beac2016-08-16 23:04:00 +0200303 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
304 {
305 lisp_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b1,
306 sizeof (*tr));
307 tr->next_index = next1;
308 tr->error = error1;
309 tr->h = lh1[0];
310 }
Florin Corase127a7e2016-02-18 22:20:01 +0100311
Florin Coras220beac2016-08-16 23:04:00 +0200312 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
313 n_left_to_next, bi0, bi1, next0,
314 next1);
315 }
316
Florin Corase127a7e2016-02-18 22:20:01 +0100317 while (n_left_from > 0 && n_left_to_next > 0)
Florin Coras220beac2016-08-16 23:04:00 +0200318 {
319 u32 bi0;
320 vlib_buffer_t *b0;
321 u32 next0;
322 ip4_udp_lisp_gpe_header_t *iul4_0;
323 ip6_udp_lisp_gpe_header_t *iul6_0;
324 lisp_gpe_header_t *lh0;
325 u32 error0;
326 uword *si0;
327 tunnel_lookup_t *tl0;
Florin Corase127a7e2016-02-18 22:20:01 +0100328
Florin Coras220beac2016-08-16 23:04:00 +0200329 bi0 = from[0];
330 to_next[0] = bi0;
331 from += 1;
332 to_next += 1;
333 n_left_from -= 1;
334 n_left_to_next -= 1;
Florin Corase127a7e2016-02-18 22:20:01 +0100335
Florin Coras220beac2016-08-16 23:04:00 +0200336 b0 = vlib_get_buffer (vm, bi0);
Florin Corase127a7e2016-02-18 22:20:01 +0100337
Florin Coras220beac2016-08-16 23:04:00 +0200338 /* udp leaves current_data pointing at the lisp header
339 * TODO: there's no difference in processing between v4 and v6
340 * encapsulated packets so the code should be simplified if ip header
341 * info is not going to be used for dp smrs/dpsec */
342 if (is_v4)
343 {
344 vlib_buffer_advance (b0,
345 -(word) (sizeof (udp_header_t) +
346 sizeof (ip4_header_t)));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700347
Florin Coras220beac2016-08-16 23:04:00 +0200348 iul4_0 = vlib_buffer_get_current (b0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700349
Florin Coras220beac2016-08-16 23:04:00 +0200350 /* pop (ip, udp, lisp-gpe) */
351 vlib_buffer_advance (b0, sizeof (*iul4_0));
Florin Coras02655bd2016-04-26 00:17:24 +0200352
Florin Coras220beac2016-08-16 23:04:00 +0200353 lh0 = &iul4_0->lisp;
354 }
355 else
356 {
357 vlib_buffer_advance (b0,
358 -(word) (sizeof (udp_header_t) +
359 sizeof (ip6_header_t)));
Florin Coras02655bd2016-04-26 00:17:24 +0200360
Florin Coras220beac2016-08-16 23:04:00 +0200361 iul6_0 = vlib_buffer_get_current (b0);
Florin Coras02655bd2016-04-26 00:17:24 +0200362
Florin Coras220beac2016-08-16 23:04:00 +0200363 /* pop (ip, udp, lisp-gpe) */
364 vlib_buffer_advance (b0, sizeof (*iul6_0));
Florin Coras02655bd2016-04-26 00:17:24 +0200365
Florin Coras220beac2016-08-16 23:04:00 +0200366 lh0 = &iul6_0->lisp;
367 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700368
Florin Coras220beac2016-08-16 23:04:00 +0200369 /* TODO if security is to be implemented, something similar to RPF,
370 * probably we'd like to check that the peer is allowed to send us
371 * packets. For this, we should use the tunnel table OR check that
372 * we have a mapping for the source eid and that the outer source of
373 * the packet is one of its locators */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700374
Florin Coras220beac2016-08-16 23:04:00 +0200375 /* determine next_index from lisp-gpe header */
376 next0 = next_protocol_to_next_index (lh0,
377 vlib_buffer_get_current (b0));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700378
Florin Coras220beac2016-08-16 23:04:00 +0200379 /* determine if tunnel is l2 or l3 */
380 tl0 = next_index_to_iface (lgm, next0);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700381
Florin Coras220beac2016-08-16 23:04:00 +0200382 /* map iid/vni to lisp-gpe sw_if_index which is used by ipx_input to
Florin Corasf1950192016-10-25 16:47:52 +0200383 * decide the rx vrf and the input features to be applied.
384 * NOTE: vni uses only the first 24 bits */
Florin Coras220beac2016-08-16 23:04:00 +0200385 si0 = hash_get (tl0->sw_if_index_by_vni,
Florin Corasf1950192016-10-25 16:47:52 +0200386 clib_net_to_host_u32 (lh0->iid << 8));
Florin Coras577c3552016-04-21 00:45:40 +0200387
Florin Coras220beac2016-08-16 23:04:00 +0200388 /* Required to make the l2 tag push / pop code work on l2 subifs */
389 vnet_update_l2_len (b0);
Florin Coras1a1adc72016-07-22 01:45:30 +0200390
Florin Coras220beac2016-08-16 23:04:00 +0200391 if (si0)
392 {
393 incr_decap_stats (lgm->vnet_main, cpu_index,
394 vlib_buffer_length_in_chain (vm, b0), si0[0],
395 &last_sw_if_index, &n_packets, &n_bytes);
396 vnet_buffer (b0)->sw_if_index[VLIB_RX] = si0[0];
397 error0 = 0;
398 }
399 else
400 {
401 next0 = LISP_GPE_INPUT_NEXT_DROP;
402 error0 = LISP_GPE_ERROR_NO_TUNNEL;
403 drops++;
404 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700405
Florin Coras220beac2016-08-16 23:04:00 +0200406 /* TODO error handling if security is implemented */
407 b0->error = error0 ? node->errors[error0] : 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700408
Florin Coras220beac2016-08-16 23:04:00 +0200409 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
410 {
411 lisp_gpe_rx_trace_t *tr = vlib_add_trace (vm, node, b0,
412 sizeof (*tr));
413 tr->next_index = next0;
414 tr->error = error0;
415 tr->h = lh0[0];
416 }
Florin Corase127a7e2016-02-18 22:20:01 +0100417
Florin Coras220beac2016-08-16 23:04:00 +0200418 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
419 n_left_to_next, bi0, next0);
420 }
Ed Warnickecb9cada2015-12-08 15:45:58 -0700421
422 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
423 }
Florin Coras0f6b7962016-06-21 22:32:47 +0200424
425 /* flush iface stats */
426 incr_decap_stats (lgm->vnet_main, cpu_index, 0, ~0, &last_sw_if_index,
Florin Coras220beac2016-08-16 23:04:00 +0200427 &n_packets, &n_bytes);
Florin Coras02655bd2016-04-26 00:17:24 +0200428 vlib_node_increment_counter (vm, lisp_gpe_ip4_input_node.index,
Florin Coras220beac2016-08-16 23:04:00 +0200429 LISP_GPE_ERROR_NO_TUNNEL, drops);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700430 return from_frame->n_vectors;
431}
432
Florin Coras02655bd2016-04-26 00:17:24 +0200433static uword
434lisp_gpe_ip4_input (vlib_main_t * vm, vlib_node_runtime_t * node,
Florin Coras220beac2016-08-16 23:04:00 +0200435 vlib_frame_t * from_frame)
Florin Coras02655bd2016-04-26 00:17:24 +0200436{
Florin Coras220beac2016-08-16 23:04:00 +0200437 return lisp_gpe_input_inline (vm, node, from_frame, 1);
Florin Coras02655bd2016-04-26 00:17:24 +0200438}
439
440static uword
441lisp_gpe_ip6_input (vlib_main_t * vm, vlib_node_runtime_t * node,
Florin Coras220beac2016-08-16 23:04:00 +0200442 vlib_frame_t * from_frame)
Florin Coras02655bd2016-04-26 00:17:24 +0200443{
Florin Coras220beac2016-08-16 23:04:00 +0200444 return lisp_gpe_input_inline (vm, node, from_frame, 0);
Florin Coras02655bd2016-04-26 00:17:24 +0200445}
446
Florin Coras220beac2016-08-16 23:04:00 +0200447static char *lisp_gpe_ip4_input_error_strings[] = {
Florin Corasf727db92016-06-23 15:01:58 +0200448#define lisp_gpe_error(n,s) s,
449#include <vnet/lisp-gpe/lisp_gpe_error.def>
450#undef lisp_gpe_error
451};
452
Florin Coras220beac2016-08-16 23:04:00 +0200453/* *INDENT-OFF* */
Florin Coras02655bd2016-04-26 00:17:24 +0200454VLIB_REGISTER_NODE (lisp_gpe_ip4_input_node) = {
455 .function = lisp_gpe_ip4_input,
456 .name = "lisp-gpe-ip4-input",
Ed Warnickecb9cada2015-12-08 15:45:58 -0700457 /* Takes a vector of packets. */
458 .vector_size = sizeof (u32),
Ed Warnickecb9cada2015-12-08 15:45:58 -0700459 .n_next_nodes = LISP_GPE_INPUT_N_NEXT,
460 .next_nodes = {
461#define _(s,n) [LISP_GPE_INPUT_NEXT_##s] = n,
Florin Coras02655bd2016-04-26 00:17:24 +0200462 foreach_lisp_gpe_ip_input_next
463#undef _
464 },
465
Florin Corasf727db92016-06-23 15:01:58 +0200466 .n_errors = ARRAY_LEN (lisp_gpe_ip4_input_error_strings),
467 .error_strings = lisp_gpe_ip4_input_error_strings,
468
Florin Coras02655bd2016-04-26 00:17:24 +0200469 .format_buffer = format_lisp_gpe_header_with_length,
470 .format_trace = format_lisp_gpe_rx_trace,
471 // $$$$ .unformat_buffer = unformat_lisp_gpe_header,
472};
Florin Coras220beac2016-08-16 23:04:00 +0200473/* *INDENT-ON* */
Florin Coras02655bd2016-04-26 00:17:24 +0200474
Florin Coras220beac2016-08-16 23:04:00 +0200475/* *INDENT-OFF* */
Florin Coras02655bd2016-04-26 00:17:24 +0200476VLIB_REGISTER_NODE (lisp_gpe_ip6_input_node) = {
477 .function = lisp_gpe_ip6_input,
478 .name = "lisp-gpe-ip6-input",
479 /* Takes a vector of packets. */
480 .vector_size = sizeof (u32),
Florin Coras02655bd2016-04-26 00:17:24 +0200481 .n_next_nodes = LISP_GPE_INPUT_N_NEXT,
482 .next_nodes = {
483#define _(s,n) [LISP_GPE_INPUT_NEXT_##s] = n,
484 foreach_lisp_gpe_ip_input_next
Ed Warnickecb9cada2015-12-08 15:45:58 -0700485#undef _
486 },
487
Florin Corasf727db92016-06-23 15:01:58 +0200488 .n_errors = ARRAY_LEN (lisp_gpe_ip4_input_error_strings),
489 .error_strings = lisp_gpe_ip4_input_error_strings,
490
Ed Warnickecb9cada2015-12-08 15:45:58 -0700491 .format_buffer = format_lisp_gpe_header_with_length,
492 .format_trace = format_lisp_gpe_rx_trace,
493 // $$$$ .unformat_buffer = unformat_lisp_gpe_header,
494};
Florin Coras220beac2016-08-16 23:04:00 +0200495/* *INDENT-ON* */
496
Florin Coras263440e2017-02-22 23:38:08 -0800497/**
498 * Adds arc from lisp-gpe-input to nsh-input if nsh-input is available
499 */
500static void
501gpe_add_arc_from_input_to_nsh ()
502{
503 lisp_gpe_main_t *lgm = vnet_lisp_gpe_get_main ();
504 vlib_main_t *vm = lgm->vlib_main;
505 vlib_node_t *nsh_input;
506
507 /* Arc already exists */
508 if (next_proto_to_next_index[LISP_GPE_NEXT_PROTO_NSH]
509 != LISP_GPE_INPUT_NEXT_DROP)
510 return;
511
512 /* Check if nsh-input is available */
513 if ((nsh_input = vlib_get_node_by_name (vm, (u8 *) "nsh-input")))
514 {
515 u32 slot4, slot6;
516 slot4 = vlib_node_add_next_with_slot (vm, lisp_gpe_ip4_input_node.index,
517 nsh_input->index,
518 LISP_GPE_NEXT_PROTO_NSH);
519 slot6 = vlib_node_add_next_with_slot (vm, lisp_gpe_ip6_input_node.index,
520 nsh_input->index,
521 LISP_GPE_NEXT_PROTO_NSH);
522 ASSERT (slot4 == slot6 && slot4 == LISP_GPE_INPUT_NEXT_NSH_INPUT);
523
524 next_proto_to_next_index[LISP_GPE_NEXT_PROTO_NSH] = slot4;
525 }
526}
527
528/** GPE decap init function. */
529clib_error_t *
530gpe_decap_init (vlib_main_t * vm)
531{
532 clib_error_t *error = 0;
533
534 if ((error = vlib_call_init_function (vm, lisp_gpe_init)))
535 return error;
536
537 gpe_add_arc_from_input_to_nsh ();
538 return 0;
539}
540
541VLIB_INIT_FUNCTION (gpe_decap_init);
542
Florin Coras220beac2016-08-16 23:04:00 +0200543/*
544 * fd.io coding-style-patch-verification: ON
545 *
546 * Local Variables:
547 * eval: (c-set-style "gnu")
548 * End:
549 */