blob: 5dbe85a1c5b6384a93e3be76642e8b96581366e2 [file] [log] [blame]
Ole Troan298c6952018-03-08 12:30:43 +01001/*
2 * ipip.c: ipip
3 *
4 * Copyright (c) 2018 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 aipiped 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 <stddef.h>
19#include <vnet/adj/adj_midchain.h>
20#include <vnet/ipip/ipip.h>
21#include <vnet/vnet.h>
22#include <vnet/adj/adj_nbr.h>
Neale Ranns4c3ba812019-03-26 07:02:58 +000023#include <vnet/adj/adj_midchain.h>
Ole Troan298c6952018-03-08 12:30:43 +010024#include <vnet/fib/ip4_fib.h>
25#include <vnet/fib/ip6_fib.h>
26#include <vnet/ip/format.h>
27#include <vnet/ipip/ipip.h>
Neale Ranns03ce4622020-02-03 10:55:09 +000028#include <vnet/teib/teib.h>
Neale Rannse5b94dd2019-12-31 05:13:14 +000029#include <vnet/tunnel/tunnel_dp.h>
Ole Troan298c6952018-03-08 12:30:43 +010030
31ipip_main_t ipip_main;
32
33/* Packet trace structure */
34typedef struct
35{
36 u32 tunnel_id;
37 u32 length;
38 ip46_address_t src;
39 ip46_address_t dst;
40} ipip_tx_trace_t;
41
42u8 *
43format_ipip_tx_trace (u8 * s, va_list * args)
44{
45 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
46 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
47 ipip_tx_trace_t *t = va_arg (*args, ipip_tx_trace_t *);
48
49 s =
50 format (s, "IPIP: tunnel %d len %d src %U dst %U", t->tunnel_id,
51 t->length, format_ip46_address, &t->src, IP46_TYPE_ANY,
52 format_ip46_address, &t->dst, IP46_TYPE_ANY);
53 return s;
54}
55
56static u8 *
57ipip_build_rewrite (vnet_main_t * vnm, u32 sw_if_index,
58 vnet_link_t link_type, const void *dst_address)
59{
Neale Ranns14053c92019-12-29 23:55:18 +000060 const ip46_address_t *dst;
Ole Troan298c6952018-03-08 12:30:43 +010061 ip4_header_t *ip4;
62 ip6_header_t *ip6;
63 u8 *rewrite = NULL;
Neale Ranns14053c92019-12-29 23:55:18 +000064 ipip_tunnel_t *t;
65
66 dst = dst_address;
67 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
Ole Troan298c6952018-03-08 12:30:43 +010068
69 if (!t)
70 /* not one of ours */
71 return (0);
72
73 switch (t->transport)
74 {
75 case IPIP_TRANSPORT_IP4:
76 vec_validate (rewrite, sizeof (*ip4) - 1);
77 ip4 = (ip4_header_t *) rewrite;
78 ip4->ip_version_and_header_length = 0x45;
79 ip4->ttl = 64;
80 /* fixup ip4 header length, protocol and checksum after-the-fact */
81 ip4->src_address.as_u32 = t->tunnel_src.ip4.as_u32;
Neale Ranns14053c92019-12-29 23:55:18 +000082 ip4->dst_address.as_u32 = dst->ip4.as_u32;
Neale Ranns59ff9182019-12-29 23:55:18 +000083 if (!(t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP))
Neale Ranns95346962019-11-25 13:04:44 +000084 ip4_header_set_dscp (ip4, t->dscp);
Neale Ranns59ff9182019-12-29 23:55:18 +000085 if (t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_SET_DF)
Neale Ranns95346962019-11-25 13:04:44 +000086 ip4_header_set_df (ip4);
Neale Rannse5b94dd2019-12-31 05:13:14 +000087
88 switch (link_type)
89 {
90 case VNET_LINK_IP6:
91 ip4->protocol = IP_PROTOCOL_IPV6;
92 break;
93 case VNET_LINK_IP4:
94 ip4->protocol = IP_PROTOCOL_IP_IN_IP;
95 break;
Neale Rannse294de62020-12-21 09:52:24 +000096 case VNET_LINK_MPLS:
97 ip4->protocol = IP_PROTOCOL_MPLS_IN_IP;
98 break;
Neale Rannse5b94dd2019-12-31 05:13:14 +000099 default:
100 break;
101 }
Neale Ranns4ec36c52020-03-31 09:21:29 -0400102 ip4->checksum = ip4_header_checksum (ip4);
Ole Troan298c6952018-03-08 12:30:43 +0100103 break;
104
105 case IPIP_TRANSPORT_IP6:
106 vec_validate (rewrite, sizeof (*ip6) - 1);
107 ip6 = (ip6_header_t *) rewrite;
108 ip6->ip_version_traffic_class_and_flow_label =
109 clib_host_to_net_u32 (6 << 28);
110 ip6->hop_limit = 64;
111 /* fixup ip6 header length and protocol after-the-fact */
112 ip6->src_address.as_u64[0] = t->tunnel_src.ip6.as_u64[0];
113 ip6->src_address.as_u64[1] = t->tunnel_src.ip6.as_u64[1];
Neale Ranns14053c92019-12-29 23:55:18 +0000114 ip6->dst_address.as_u64[0] = dst->ip6.as_u64[0];
115 ip6->dst_address.as_u64[1] = dst->ip6.as_u64[1];
Neale Ranns59ff9182019-12-29 23:55:18 +0000116 if (!(t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_COPY_DSCP))
Neale Ranns95346962019-11-25 13:04:44 +0000117 ip6_set_dscp_network_order (ip6, t->dscp);
Neale Rannse5b94dd2019-12-31 05:13:14 +0000118
119 switch (link_type)
120 {
121 case VNET_LINK_IP6:
122 ip6->protocol = IP_PROTOCOL_IPV6;
123 break;
124 case VNET_LINK_IP4:
125 ip6->protocol = IP_PROTOCOL_IP_IN_IP;
126 break;
Neale Rannse294de62020-12-21 09:52:24 +0000127 case VNET_LINK_MPLS:
128 ip6->protocol = IP_PROTOCOL_MPLS_IN_IP;
129 break;
Neale Rannse5b94dd2019-12-31 05:13:14 +0000130 default:
131 break;
132 }
Ole Troan298c6952018-03-08 12:30:43 +0100133 break;
Ole Troan298c6952018-03-08 12:30:43 +0100134 }
135 return (rewrite);
136}
137
138static void
Neale Rannse5b94dd2019-12-31 05:13:14 +0000139ipip64_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b,
140 const void *data)
Ole Troan298c6952018-03-08 12:30:43 +0100141{
Neale Ranns14053c92019-12-29 23:55:18 +0000142 tunnel_encap_decap_flags_t flags;
Ole Troan298c6952018-03-08 12:30:43 +0100143 ip4_header_t *ip4;
Neale Ranns14053c92019-12-29 23:55:18 +0000144
145 flags = pointer_to_uword (data);
Ole Troan298c6952018-03-08 12:30:43 +0100146
147 ip4 = vlib_buffer_get_current (b);
148 ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b));
Neale Rannse5b94dd2019-12-31 05:13:14 +0000149 tunnel_encap_fixup_6o4 (flags, ((ip6_header_t *) (ip4 + 1)), ip4);
Ole Troand57f6362018-05-24 13:21:43 +0200150
Ole Troan298c6952018-03-08 12:30:43 +0100151 ip4->checksum = ip4_header_checksum (ip4);
152}
153
154static void
Neale Rannse5b94dd2019-12-31 05:13:14 +0000155ipip44_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b,
156 const void *data)
157{
158 tunnel_encap_decap_flags_t flags;
159 ip4_header_t *ip4;
160
161 flags = pointer_to_uword (data);
162
163 ip4 = vlib_buffer_get_current (b);
164 ip4->length = clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b));
165 tunnel_encap_fixup_4o4 (flags, ip4 + 1, ip4);
166
167 ip4->checksum = ip4_header_checksum (ip4);
168}
169
170static void
171ipip46_fixup (vlib_main_t * vm, const ip_adjacency_t * adj, vlib_buffer_t * b,
172 const void *data)
Ole Troan298c6952018-03-08 12:30:43 +0100173{
Neale Ranns14053c92019-12-29 23:55:18 +0000174 tunnel_encap_decap_flags_t flags;
Ole Troan298c6952018-03-08 12:30:43 +0100175 ip6_header_t *ip6;
Neale Ranns14053c92019-12-29 23:55:18 +0000176
177 flags = pointer_to_uword (data);
Ole Troan298c6952018-03-08 12:30:43 +0100178
Ole Troan282093f2018-09-19 12:38:51 +0200179 /* Must set locally originated otherwise we're not allowed to
180 fragment the packet later */
181 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
182
Ole Troan298c6952018-03-08 12:30:43 +0100183 ip6 = vlib_buffer_get_current (b);
184 ip6->payload_length =
185 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b) -
186 sizeof (*ip6));
Neale Rannsa91cb452021-02-04 11:02:52 +0000187 tunnel_encap_fixup_4o6 (flags, b, ((ip4_header_t *) (ip6 + 1)), ip6);
Neale Rannse5b94dd2019-12-31 05:13:14 +0000188}
Ole Troand57f6362018-05-24 13:21:43 +0200189
Neale Rannse5b94dd2019-12-31 05:13:14 +0000190static void
191ipip66_fixup (vlib_main_t * vm,
192 const ip_adjacency_t * adj, vlib_buffer_t * b, const void *data)
193{
194 tunnel_encap_decap_flags_t flags;
195 ip6_header_t *ip6;
Ole Troand57f6362018-05-24 13:21:43 +0200196
Neale Rannse5b94dd2019-12-31 05:13:14 +0000197 flags = pointer_to_uword (data);
198
199 /* Must set locally originated otherwise we're not allowed to
200 fragment the packet later */
201 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
202
203 ip6 = vlib_buffer_get_current (b);
204 ip6->payload_length =
205 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b) -
206 sizeof (*ip6));
207 tunnel_encap_fixup_6o6 (flags, ip6 + 1, ip6);
Ole Troan298c6952018-03-08 12:30:43 +0100208}
209
210static void
Neale Rannse294de62020-12-21 09:52:24 +0000211ipipm6_fixup (vlib_main_t *vm, const ip_adjacency_t *adj, vlib_buffer_t *b,
212 const void *data)
213{
214 tunnel_encap_decap_flags_t flags;
215 ip6_header_t *ip6;
216
217 flags = pointer_to_uword (data);
218
219 /* Must set locally originated otherwise we're not allowed to
220 fragment the packet later and we'll get an unwanted hop-limt
221 decrement */
222 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
223
224 ip6 = vlib_buffer_get_current (b);
225 ip6->payload_length =
226 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b) - sizeof (*ip6));
Neale Rannsa91cb452021-02-04 11:02:52 +0000227 tunnel_encap_fixup_mplso6 (flags, b, (mpls_unicast_header_t *) (ip6 + 1),
228 ip6);
Neale Rannse294de62020-12-21 09:52:24 +0000229}
230
231static void
232ipipm4_fixup (vlib_main_t *vm, const ip_adjacency_t *adj, vlib_buffer_t *b,
233 const void *data)
234{
235 tunnel_encap_decap_flags_t flags;
236 ip4_header_t *ip4;
237
238 flags = pointer_to_uword (data);
239
240 /* Must set locally originated otherwise we'll do a TTL decrement
241 * during ip4-rewrite */
242 b->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
243
244 ip4 = vlib_buffer_get_current (b);
245 ip4->length =
246 clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b) - sizeof (*ip4));
247 tunnel_encap_fixup_mplso4 (flags, (mpls_unicast_header_t *) (ip4 + 1), ip4);
248 ip4->checksum = ip4_header_checksum (ip4);
249}
250
251static void
Ole Troan298c6952018-03-08 12:30:43 +0100252ipip_tunnel_stack (adj_index_t ai)
253{
254 ip_adjacency_t *adj;
255 ipip_tunnel_t *t;
256 u32 sw_if_index;
257
258 adj = adj_get (ai);
259 sw_if_index = adj->rewrite_header.sw_if_index;
260
261 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
262 if (!t)
263 return;
264
265 if ((vnet_hw_interface_get_flags (vnet_get_main (), t->hw_if_index) &
266 VNET_HW_INTERFACE_FLAG_LINK_UP) == 0)
267 {
Neale Ranns4c3ba812019-03-26 07:02:58 +0000268 adj_midchain_delegate_unstack (ai);
Ole Troan298c6952018-03-08 12:30:43 +0100269 }
Neale Ranns521a8d72018-12-06 13:46:49 +0000270 else
Ole Troan298c6952018-03-08 12:30:43 +0100271 {
Neale Ranns4c3ba812019-03-26 07:02:58 +0000272 /* *INDENT-OFF* */
273 fib_prefix_t dst = {
274 .fp_len = t->transport == IPIP_TRANSPORT_IP6 ? 128 : 32,
275 .fp_proto = (t->transport == IPIP_TRANSPORT_IP6 ?
276 FIB_PROTOCOL_IP6 :
277 FIB_PROTOCOL_IP4),
278 .fp_addr = t->tunnel_dst
279 };
280 /* *INDENT-ON* */
281
282 adj_midchain_delegate_stack (ai, t->fib_index, &dst);
Ole Troan298c6952018-03-08 12:30:43 +0100283 }
Ole Troan298c6952018-03-08 12:30:43 +0100284}
285
286static adj_walk_rc_t
287ipip_adj_walk_cb (adj_index_t ai, void *ctx)
288{
289 ipip_tunnel_stack (ai);
290
291 return (ADJ_WALK_RC_CONTINUE);
292}
293
294static void
295ipip_tunnel_restack (ipip_tunnel_t * gt)
296{
297 fib_protocol_t proto;
298
299 /*
300 * walk all the adjacencies on th IPIP interface and restack them
301 */
302 FOR_EACH_FIB_IP_PROTOCOL (proto)
303 {
304 adj_nbr_walk (gt->sw_if_index, proto, ipip_adj_walk_cb, NULL);
305 }
306}
307
Neale Rannse5b94dd2019-12-31 05:13:14 +0000308static adj_midchain_fixup_t
Neale Ranns4ec36c52020-03-31 09:21:29 -0400309ipip_get_fixup (const ipip_tunnel_t * t, vnet_link_t lt, adj_flags_t * aflags)
Neale Rannse5b94dd2019-12-31 05:13:14 +0000310{
311 if (t->transport == IPIP_TRANSPORT_IP6 && lt == VNET_LINK_IP6)
312 return (ipip66_fixup);
313 if (t->transport == IPIP_TRANSPORT_IP6 && lt == VNET_LINK_IP4)
314 return (ipip46_fixup);
Neale Rannse294de62020-12-21 09:52:24 +0000315 if (t->transport == IPIP_TRANSPORT_IP6 && lt == VNET_LINK_MPLS)
316 return (ipipm6_fixup);
Neale Rannse5b94dd2019-12-31 05:13:14 +0000317 if (t->transport == IPIP_TRANSPORT_IP4 && lt == VNET_LINK_IP6)
318 return (ipip64_fixup);
Neale Rannse294de62020-12-21 09:52:24 +0000319 if (t->transport == IPIP_TRANSPORT_IP4 && lt == VNET_LINK_MPLS)
320 return (ipipm4_fixup);
Neale Rannse5b94dd2019-12-31 05:13:14 +0000321 if (t->transport == IPIP_TRANSPORT_IP4 && lt == VNET_LINK_IP4)
Neale Ranns4ec36c52020-03-31 09:21:29 -0400322 {
323 *aflags = *aflags | ADJ_FLAG_MIDCHAIN_FIXUP_IP4O4_HDR;
324 return (ipip44_fixup);
325 }
Neale Rannse5b94dd2019-12-31 05:13:14 +0000326
327 ASSERT (0);
328 return (ipip44_fixup);
329}
330
Ole Troan298c6952018-03-08 12:30:43 +0100331void
332ipip_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
333{
Neale Ranns4ec36c52020-03-31 09:21:29 -0400334 adj_midchain_fixup_t fixup;
Neale Ranns521a8d72018-12-06 13:46:49 +0000335 ipip_tunnel_t *t;
336 adj_flags_t af;
Ole Troan298c6952018-03-08 12:30:43 +0100337
Neale Ranns65d789e2021-02-08 15:24:56 +0000338 af = ADJ_FLAG_NONE;
Ole Troan298c6952018-03-08 12:30:43 +0100339 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
340 if (!t)
341 return;
342
Neale Ranns65d789e2021-02-08 15:24:56 +0000343 /*
344 * the user has not requested that the load-balancing be based on
345 * a flow hash of the inner packet. so use the stacking to choose
346 * a path.
347 */
348 if (!(t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_INNER_HASH))
349 af |= ADJ_FLAG_MIDCHAIN_IP_STACK;
Mohammed Hawari33c45f52020-11-30 13:50:24 +0100350
Neale Ranns521a8d72018-12-06 13:46:49 +0000351 if (VNET_LINK_ETHERNET == adj_get_link_type (ai))
352 af |= ADJ_FLAG_MIDCHAIN_NO_COUNT;
Ole Troan298c6952018-03-08 12:30:43 +0100353
Neale Ranns4ec36c52020-03-31 09:21:29 -0400354 fixup = ipip_get_fixup (t, adj_get_link_type (ai), &af);
Neale Ranns14053c92019-12-29 23:55:18 +0000355 adj_nbr_midchain_update_rewrite
Neale Ranns4ec36c52020-03-31 09:21:29 -0400356 (ai, fixup,
Neale Rannse5b94dd2019-12-31 05:13:14 +0000357 uword_to_pointer (t->flags, void *), af,
Neale Ranns14053c92019-12-29 23:55:18 +0000358 ipip_build_rewrite (vnm, sw_if_index,
359 adj_get_link_type (ai), &t->tunnel_dst));
Ole Troan298c6952018-03-08 12:30:43 +0100360 ipip_tunnel_stack (ai);
361}
362
Neale Ranns14053c92019-12-29 23:55:18 +0000363typedef struct mipip_walk_ctx_t_
364{
365 const ipip_tunnel_t *t;
Neale Ranns03ce4622020-02-03 10:55:09 +0000366 const teib_entry_t *ne;
Neale Ranns14053c92019-12-29 23:55:18 +0000367} mipip_walk_ctx_t;
368
369static adj_walk_rc_t
370mipip_mk_complete_walk (adj_index_t ai, void *data)
371{
Neale Ranns4ec36c52020-03-31 09:21:29 -0400372 adj_midchain_fixup_t fixup;
Neale Ranns14053c92019-12-29 23:55:18 +0000373 mipip_walk_ctx_t *ctx = data;
Neale Ranns4ec36c52020-03-31 09:21:29 -0400374 adj_flags_t af;
375
376 af = ADJ_FLAG_NONE;
377 fixup = ipip_get_fixup (ctx->t, adj_get_link_type (ai), &af);
Neale Ranns14053c92019-12-29 23:55:18 +0000378
Neale Ranns65d789e2021-02-08 15:24:56 +0000379 /*
380 * the user has not requested that the load-balancing be based on
381 * a flow hash of the inner packet. so use the stacking to choose
382 * a path.
383 */
384 if (!(ctx->t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_INNER_HASH))
385 af |= ADJ_FLAG_MIDCHAIN_IP_STACK;
Mohammed Hawari33c45f52020-11-30 13:50:24 +0100386
Neale Ranns14053c92019-12-29 23:55:18 +0000387 adj_nbr_midchain_update_rewrite
Neale Ranns4ec36c52020-03-31 09:21:29 -0400388 (ai, fixup,
Neale Rannse5b94dd2019-12-31 05:13:14 +0000389 uword_to_pointer (ctx->t->flags, void *),
Mohammed Hawari33c45f52020-11-30 13:50:24 +0100390 af, ipip_build_rewrite (vnet_get_main (),
391 ctx->t->sw_if_index,
392 adj_get_link_type (ai),
393 &teib_entry_get_nh (ctx->ne)->fp_addr));
Neale Ranns14053c92019-12-29 23:55:18 +0000394
Neale Ranns03ce4622020-02-03 10:55:09 +0000395 teib_entry_adj_stack (ctx->ne, ai);
Neale Ranns14053c92019-12-29 23:55:18 +0000396
397 return (ADJ_WALK_RC_CONTINUE);
398}
399
400static adj_walk_rc_t
401mipip_mk_incomplete_walk (adj_index_t ai, void *data)
402{
Neale Ranns4ec36c52020-03-31 09:21:29 -0400403 adj_midchain_fixup_t fixup;
Neale Ranns14053c92019-12-29 23:55:18 +0000404 ipip_tunnel_t *t = data;
Neale Ranns4ec36c52020-03-31 09:21:29 -0400405 adj_flags_t af;
Neale Ranns14053c92019-12-29 23:55:18 +0000406
Neale Ranns4ec36c52020-03-31 09:21:29 -0400407 af = ADJ_FLAG_NONE;
408 fixup = ipip_get_fixup (t, adj_get_link_type (ai), &af);
409
410 adj_nbr_midchain_update_rewrite (ai, fixup, NULL, ADJ_FLAG_NONE, NULL);
Neale Ranns14053c92019-12-29 23:55:18 +0000411
412 adj_midchain_delegate_unstack (ai);
413
414 return (ADJ_WALK_RC_CONTINUE);
415}
416
417void
418mipip_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
419{
420 ipip_main_t *gm = &ipip_main;
Neale Ranns4ec36c52020-03-31 09:21:29 -0400421 adj_midchain_fixup_t fixup;
Neale Ranns14053c92019-12-29 23:55:18 +0000422 ip_adjacency_t *adj;
Neale Ranns03ce4622020-02-03 10:55:09 +0000423 teib_entry_t *ne;
Neale Ranns14053c92019-12-29 23:55:18 +0000424 ipip_tunnel_t *t;
Neale Ranns4ec36c52020-03-31 09:21:29 -0400425 adj_flags_t af;
Neale Ranns14053c92019-12-29 23:55:18 +0000426 u32 ti;
427
Neale Ranns4ec36c52020-03-31 09:21:29 -0400428 af = ADJ_FLAG_NONE;
Neale Ranns14053c92019-12-29 23:55:18 +0000429 adj = adj_get (ai);
430 ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
431 t = pool_elt_at_index (gm->tunnels, ti);
Neale Ranns14053c92019-12-29 23:55:18 +0000432
Neale Rannse6b83052020-09-17 12:56:47 +0000433 ne = teib_entry_find_46 (sw_if_index,
434 adj->ia_nh_proto, &adj->sub_type.nbr.next_hop);
Neale Ranns14053c92019-12-29 23:55:18 +0000435
436 if (NULL == ne)
437 {
Neale Ranns4ec36c52020-03-31 09:21:29 -0400438 // no TEIB entry to provide the next-hop
439 fixup = ipip_get_fixup (t, adj_get_link_type (ai), &af);
Neale Ranns14053c92019-12-29 23:55:18 +0000440 adj_nbr_midchain_update_rewrite
Neale Ranns4ec36c52020-03-31 09:21:29 -0400441 (ai, fixup, uword_to_pointer (t->flags, void *), ADJ_FLAG_NONE, NULL);
Neale Ranns14053c92019-12-29 23:55:18 +0000442 return;
443 }
444
445 mipip_walk_ctx_t ctx = {
446 .t = t,
447 .ne = ne
448 };
449 adj_nbr_walk_nh (sw_if_index,
450 adj->ia_nh_proto,
451 &adj->sub_type.nbr.next_hop, mipip_mk_complete_walk, &ctx);
452}
453
Ole Troan298c6952018-03-08 12:30:43 +0100454static u8 *
455format_ipip_tunnel_name (u8 * s, va_list * args)
456{
457 u32 dev_instance = va_arg (*args, u32);
458 ipip_main_t *gm = &ipip_main;
459 ipip_tunnel_t *t;
460
461 if (dev_instance >= vec_len (gm->tunnels))
462 return format (s, "<improperly-referenced>");
463
464 t = pool_elt_at_index (gm->tunnels, dev_instance);
465 return format (s, "ipip%d", t->user_instance);
466}
467
468static u8 *
469format_ipip_device (u8 * s, va_list * args)
470{
471 u32 dev_instance = va_arg (*args, u32);
472 CLIB_UNUSED (int verbose) = va_arg (*args, int);
473
474 s = format (s, "IPIP tunnel: id %d\n", dev_instance);
475 return s;
476}
477
478static clib_error_t *
479ipip_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
480{
481 vnet_hw_interface_t *hi;
482 ipip_tunnel_t *t;
483
484 hi = vnet_get_hw_interface (vnm, hw_if_index);
485
486 t = ipip_tunnel_db_find_by_sw_if_index (hi->sw_if_index);
487 if (!t)
488 return 0;
489
490 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
491 vnet_hw_interface_set_flags (vnm, hw_if_index,
492 VNET_HW_INTERFACE_FLAG_LINK_UP);
493 else
494 vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
495
496 ipip_tunnel_restack (t);
497
498 return /* no error */ 0;
499}
500
Neale Rannsc87b66c2019-02-07 07:26:12 -0800501static int
502ipip_tunnel_desc (u32 sw_if_index,
503 ip46_address_t * src, ip46_address_t * dst, u8 * is_l2)
504{
505 ipip_tunnel_t *t;
506
507 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
508 if (!t)
509 return -1;
510
511 *src = t->tunnel_src;
512 *dst = t->tunnel_dst;
513 *is_l2 = 0;
514
515 return (0);
516}
517
Ole Troan298c6952018-03-08 12:30:43 +0100518/* *INDENT-OFF* */
519VNET_DEVICE_CLASS(ipip_device_class) = {
520 .name = "IPIP tunnel device",
521 .format_device_name = format_ipip_tunnel_name,
522 .format_device = format_ipip_device,
523 .format_tx_trace = format_ipip_tx_trace,
524 .admin_up_down_function = ipip_interface_admin_up_down,
Neale Rannsc87b66c2019-02-07 07:26:12 -0800525 .ip_tun_desc = ipip_tunnel_desc,
Ole Troan298c6952018-03-08 12:30:43 +0100526#ifdef SOON
527 .clear counter = 0;
528#endif
529};
530
531VNET_HW_INTERFACE_CLASS(ipip_hw_interface_class) = {
532 .name = "IPIP",
533 //.format_header = format_ipip_header_with_length,
534 //.unformat_header = unformat_ipip_header,
535 .build_rewrite = ipip_build_rewrite,
536 .update_adjacency = ipip_update_adj,
537 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
538};
Neale Ranns14053c92019-12-29 23:55:18 +0000539
540VNET_HW_INTERFACE_CLASS(mipip_hw_interface_class) = {
541 .name = "mIPIP",
542 //.format_header = format_ipip_header_with_length,
543 //.unformat_header = unformat_ipip_header,
544 .build_rewrite = ipip_build_rewrite,
545 .update_adjacency = mipip_update_adj,
546 .flags = VNET_HW_INTERFACE_CLASS_FLAG_NBMA,
547};
Ole Troan298c6952018-03-08 12:30:43 +0100548/* *INDENT-ON* */
549
550ipip_tunnel_t *
Neale Ranns14053c92019-12-29 23:55:18 +0000551ipip_tunnel_db_find (const ipip_tunnel_key_t * key)
Ole Troan298c6952018-03-08 12:30:43 +0100552{
553 ipip_main_t *gm = &ipip_main;
554 uword *p;
555
556 p = hash_get_mem (gm->tunnel_by_key, key);
557 if (!p)
558 return (NULL);
559 return (pool_elt_at_index (gm->tunnels, p[0]));
560}
561
562ipip_tunnel_t *
563ipip_tunnel_db_find_by_sw_if_index (u32 sw_if_index)
564{
565 ipip_main_t *gm = &ipip_main;
Eyal Baricd307742018-07-22 12:45:15 +0300566 if (vec_len (gm->tunnel_index_by_sw_if_index) <= sw_if_index)
Ole Troan298c6952018-03-08 12:30:43 +0100567 return NULL;
568 u32 ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
569 if (ti == ~0)
570 return NULL;
571 return pool_elt_at_index (gm->tunnels, ti);
572}
573
574void
Neale Ranns14053c92019-12-29 23:55:18 +0000575ipip_tunnel_db_add (ipip_tunnel_t * t, const ipip_tunnel_key_t * key)
Ole Troan298c6952018-03-08 12:30:43 +0100576{
577 ipip_main_t *gm = &ipip_main;
578
Neale Ranns14053c92019-12-29 23:55:18 +0000579 hash_set_mem_alloc (&gm->tunnel_by_key, key, t->dev_instance);
Ole Troan298c6952018-03-08 12:30:43 +0100580}
581
582void
Neale Ranns14053c92019-12-29 23:55:18 +0000583ipip_tunnel_db_remove (ipip_tunnel_t * t, const ipip_tunnel_key_t * key)
Ole Troan298c6952018-03-08 12:30:43 +0100584{
585 ipip_main_t *gm = &ipip_main;
586
Neale Ranns14053c92019-12-29 23:55:18 +0000587 hash_unset_mem_free (&gm->tunnel_by_key, key);
588}
589
590void
591ipip_mk_key_i (ipip_transport_t transport,
592 ipip_mode_t mode,
593 const ip46_address_t * src,
594 const ip46_address_t * dst,
595 u32 fib_index, ipip_tunnel_key_t * key)
596{
597 key->transport = transport;
598 key->mode = mode;
599 key->src = *src;
600 key->dst = *dst;
601 key->fib_index = fib_index;
602 key->__pad = 0;;
603}
604
605void
606ipip_mk_key (const ipip_tunnel_t * t, ipip_tunnel_key_t * key)
607{
608 ipip_mk_key_i (t->transport, t->mode,
609 &t->tunnel_src, &t->tunnel_dst, t->fib_index, key);
610}
611
612static void
Neale Ranns03ce4622020-02-03 10:55:09 +0000613ipip_teib_mk_key (const ipip_tunnel_t * t,
614 const teib_entry_t * ne, ipip_tunnel_key_t * key)
Neale Ranns14053c92019-12-29 23:55:18 +0000615{
616 const fib_prefix_t *nh;
617
Neale Ranns03ce4622020-02-03 10:55:09 +0000618 nh = teib_entry_get_nh (ne);
Neale Ranns14053c92019-12-29 23:55:18 +0000619
620 /* construct the key using mode P2P so it can be found in the DP */
621 ipip_mk_key_i (t->transport, IPIP_MODE_P2P,
622 &t->tunnel_src, &nh->fp_addr,
Neale Ranns03ce4622020-02-03 10:55:09 +0000623 teib_entry_get_fib_index (ne), key);
Neale Ranns14053c92019-12-29 23:55:18 +0000624}
625
626static void
Neale Ranns03ce4622020-02-03 10:55:09 +0000627ipip_teib_entry_added (const teib_entry_t * ne)
Neale Ranns14053c92019-12-29 23:55:18 +0000628{
629 ipip_main_t *gm = &ipip_main;
Neale Rannse6b83052020-09-17 12:56:47 +0000630 const ip_address_t *nh;
Neale Ranns14053c92019-12-29 23:55:18 +0000631 ipip_tunnel_key_t key;
632 ipip_tunnel_t *t;
633 u32 sw_if_index;
634 u32 t_idx;
635
Neale Ranns03ce4622020-02-03 10:55:09 +0000636 sw_if_index = teib_entry_get_sw_if_index (ne);
Neale Ranns14053c92019-12-29 23:55:18 +0000637 if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
638 return;
639
640 t_idx = gm->tunnel_index_by_sw_if_index[sw_if_index];
641
642 if (INDEX_INVALID == t_idx)
643 return;
644
645 t = pool_elt_at_index (gm->tunnels, t_idx);
646
Neale Ranns03ce4622020-02-03 10:55:09 +0000647 ipip_teib_mk_key (t, ne, &key);
Neale Ranns14053c92019-12-29 23:55:18 +0000648 ipip_tunnel_db_add (t, &key);
649
650 // update the rewrites for each of the adjacencies for this next-hop
651 mipip_walk_ctx_t ctx = {
652 .t = t,
653 .ne = ne
654 };
Neale Ranns03ce4622020-02-03 10:55:09 +0000655 nh = teib_entry_get_peer (ne);
656 adj_nbr_walk_nh (teib_entry_get_sw_if_index (ne),
Neale Rannse6b83052020-09-17 12:56:47 +0000657 (AF_IP4 == ip_addr_version (nh) ?
Neale Ranns14053c92019-12-29 23:55:18 +0000658 FIB_PROTOCOL_IP4 :
Neale Rannse6b83052020-09-17 12:56:47 +0000659 FIB_PROTOCOL_IP6),
660 &ip_addr_46 (nh), mipip_mk_complete_walk, &ctx);
Neale Ranns14053c92019-12-29 23:55:18 +0000661}
662
663static void
Neale Ranns03ce4622020-02-03 10:55:09 +0000664ipip_teib_entry_deleted (const teib_entry_t * ne)
Neale Ranns14053c92019-12-29 23:55:18 +0000665{
666 ipip_main_t *gm = &ipip_main;
Neale Rannse6b83052020-09-17 12:56:47 +0000667 const ip_address_t *nh;
Neale Ranns14053c92019-12-29 23:55:18 +0000668 ipip_tunnel_key_t key;
669 ipip_tunnel_t *t;
670 u32 sw_if_index;
671 u32 t_idx;
672
Neale Ranns03ce4622020-02-03 10:55:09 +0000673 sw_if_index = teib_entry_get_sw_if_index (ne);
Neale Ranns14053c92019-12-29 23:55:18 +0000674 if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
675 return;
676
677 t_idx = gm->tunnel_index_by_sw_if_index[sw_if_index];
678
679 if (INDEX_INVALID == t_idx)
680 return;
681
682 t = pool_elt_at_index (gm->tunnels, t_idx);
683
Neale Ranns03ce4622020-02-03 10:55:09 +0000684 ipip_teib_mk_key (t, ne, &key);
Neale Ranns14053c92019-12-29 23:55:18 +0000685 ipip_tunnel_db_remove (t, &key);
686
Neale Ranns03ce4622020-02-03 10:55:09 +0000687 nh = teib_entry_get_peer (ne);
Neale Ranns14053c92019-12-29 23:55:18 +0000688
689 /* make all the adjacencies incomplete */
Neale Ranns03ce4622020-02-03 10:55:09 +0000690 adj_nbr_walk_nh (teib_entry_get_sw_if_index (ne),
Neale Rannse6b83052020-09-17 12:56:47 +0000691 (AF_IP4 == ip_addr_version (nh) ?
Neale Ranns14053c92019-12-29 23:55:18 +0000692 FIB_PROTOCOL_IP4 :
Neale Rannse6b83052020-09-17 12:56:47 +0000693 FIB_PROTOCOL_IP6),
694 &ip_addr_46 (nh), mipip_mk_incomplete_walk, t);
Neale Ranns14053c92019-12-29 23:55:18 +0000695}
696
697static walk_rc_t
Neale Ranns03ce4622020-02-03 10:55:09 +0000698ipip_tunnel_delete_teib_walk (index_t nei, void *ctx)
Neale Ranns14053c92019-12-29 23:55:18 +0000699{
700 ipip_tunnel_t *t = ctx;
701 ipip_tunnel_key_t key;
702
Neale Ranns03ce4622020-02-03 10:55:09 +0000703 ipip_teib_mk_key (t, teib_entry_get (nei), &key);
Neale Ranns14053c92019-12-29 23:55:18 +0000704 ipip_tunnel_db_remove (t, &key);
705
706 return (WALK_CONTINUE);
707}
708
709static walk_rc_t
Neale Ranns03ce4622020-02-03 10:55:09 +0000710ipip_tunnel_add_teib_walk (index_t nei, void *ctx)
Neale Ranns14053c92019-12-29 23:55:18 +0000711{
712 ipip_tunnel_t *t = ctx;
713 ipip_tunnel_key_t key;
714
Neale Ranns03ce4622020-02-03 10:55:09 +0000715 ipip_teib_mk_key (t, teib_entry_get (nei), &key);
Neale Ranns14053c92019-12-29 23:55:18 +0000716 ipip_tunnel_db_add (t, &key);
717
718 return (WALK_CONTINUE);
Ole Troan298c6952018-03-08 12:30:43 +0100719}
720
Ole Troan298c6952018-03-08 12:30:43 +0100721int
722ipip_add_tunnel (ipip_transport_t transport,
723 u32 instance, ip46_address_t * src, ip46_address_t * dst,
Neale Ranns59ff9182019-12-29 23:55:18 +0000724 u32 fib_index, tunnel_encap_decap_flags_t flags,
Neale Ranns14053c92019-12-29 23:55:18 +0000725 ip_dscp_t dscp, tunnel_mode_t tmode, u32 * sw_if_indexp)
Ole Troan298c6952018-03-08 12:30:43 +0100726{
727 ipip_main_t *gm = &ipip_main;
728 vnet_main_t *vnm = gm->vnet_main;
Ole Troan298c6952018-03-08 12:30:43 +0100729 ipip_tunnel_t *t;
730 vnet_hw_interface_t *hi;
731 u32 hw_if_index, sw_if_index;
Neale Ranns14053c92019-12-29 23:55:18 +0000732 ipip_tunnel_key_t key;
733 ipip_mode_t mode;
734
735 if (tmode == TUNNEL_MODE_MP && !ip46_address_is_zero (dst))
736 return (VNET_API_ERROR_INVALID_DST_ADDRESS);
737
738 mode = (tmode == TUNNEL_MODE_P2P ? IPIP_MODE_P2P : IPIP_MODE_P2MP);
739 ipip_mk_key_i (transport, mode, src, dst, fib_index, &key);
740
Ole Troan298c6952018-03-08 12:30:43 +0100741 t = ipip_tunnel_db_find (&key);
742 if (t)
Filip Tehlar4c6b1b62019-11-30 20:49:40 +0000743 {
744 if (sw_if_indexp)
745 sw_if_indexp[0] = t->sw_if_index;
746 return VNET_API_ERROR_IF_ALREADY_EXISTS;
747 }
Ole Troan298c6952018-03-08 12:30:43 +0100748
749 pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES);
Dave Barachb7b92992018-10-17 10:38:51 -0400750 clib_memset (t, 0, sizeof (*t));
Ole Troan298c6952018-03-08 12:30:43 +0100751
752 /* Reconcile the real dev_instance and a possible requested instance */
753 u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */
754 u32 u_idx = instance; /* user specified instance */
755 if (u_idx == ~0)
756 u_idx = t_idx;
757 if (hash_get (gm->instance_used, u_idx))
758 {
759 pool_put (gm->tunnels, t);
760 return VNET_API_ERROR_INSTANCE_IN_USE;
761 }
762 hash_set (gm->instance_used, u_idx, 1);
763
764 t->dev_instance = t_idx; /* actual */
765 t->user_instance = u_idx; /* name */
Ole Troan298c6952018-03-08 12:30:43 +0100766
767 hw_if_index = vnet_register_interface (vnm, ipip_device_class.index, t_idx,
Neale Ranns14053c92019-12-29 23:55:18 +0000768 (mode == IPIP_MODE_P2P ?
769 ipip_hw_interface_class.index :
770 mipip_hw_interface_class.index),
Ole Troan298c6952018-03-08 12:30:43 +0100771 t_idx);
772
773 hi = vnet_get_hw_interface (vnm, hw_if_index);
774 sw_if_index = hi->sw_if_index;
775
Neale Ranns14053c92019-12-29 23:55:18 +0000776 t->mode = mode;
Ole Troan298c6952018-03-08 12:30:43 +0100777 t->hw_if_index = hw_if_index;
778 t->fib_index = fib_index;
779 t->sw_if_index = sw_if_index;
Neale Ranns95346962019-11-25 13:04:44 +0000780 t->dscp = dscp;
781 t->flags = flags;
Ole Troan298c6952018-03-08 12:30:43 +0100782 t->transport = transport;
Neale Ranns95346962019-11-25 13:04:44 +0000783
Ole Troan298c6952018-03-08 12:30:43 +0100784 vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, sw_if_index, ~0);
785 gm->tunnel_index_by_sw_if_index[sw_if_index] = t_idx;
786
787 if (t->transport == IPIP_TRANSPORT_IP4)
788 {
Ole Troan298c6952018-03-08 12:30:43 +0100789 hi->min_packet_bytes = 64 + sizeof (ip4_header_t);
790 }
791 else
792 {
Ole Troan298c6952018-03-08 12:30:43 +0100793 hi->min_packet_bytes = 64 + sizeof (ip6_header_t);
794 }
795
Damjan Marionfe7d4a22018-04-13 19:43:39 +0200796 /* Standard default ipip MTU. */
Ole Troand7231612018-06-07 10:17:57 +0200797 vnet_sw_interface_set_mtu (vnm, sw_if_index, 9000);
Ole Troan298c6952018-03-08 12:30:43 +0100798
799 t->tunnel_src = *src;
800 t->tunnel_dst = *dst;
801
802 ipip_tunnel_db_add (t, &key);
803
Neale Ranns14053c92019-12-29 23:55:18 +0000804 if (t->mode == IPIP_MODE_P2MP)
Neale Ranns03ce4622020-02-03 10:55:09 +0000805 teib_walk_itf (t->sw_if_index, ipip_tunnel_add_teib_walk, t);
Neale Ranns14053c92019-12-29 23:55:18 +0000806
Ole Troan298c6952018-03-08 12:30:43 +0100807 if (sw_if_indexp)
808 *sw_if_indexp = sw_if_index;
809
810 if (t->transport == IPIP_TRANSPORT_IP6 && !gm->ip6_protocol_registered)
811 {
812 ip6_register_protocol (IP_PROTOCOL_IP_IN_IP, ipip6_input_node.index);
Neale Rannse294de62020-12-21 09:52:24 +0000813 ip6_register_protocol (IP_PROTOCOL_MPLS_IN_IP, ipip6_input_node.index);
Ole Troan298c6952018-03-08 12:30:43 +0100814 ip6_register_protocol (IP_PROTOCOL_IPV6, ipip6_input_node.index);
815 gm->ip6_protocol_registered = true;
816 }
817 else if (t->transport == IPIP_TRANSPORT_IP4 && !gm->ip4_protocol_registered)
818 {
819 ip4_register_protocol (IP_PROTOCOL_IP_IN_IP, ipip4_input_node.index);
Neale Rannse294de62020-12-21 09:52:24 +0000820 ip4_register_protocol (IP_PROTOCOL_MPLS_IN_IP, ipip4_input_node.index);
Ole Troan298c6952018-03-08 12:30:43 +0100821 ip4_register_protocol (IP_PROTOCOL_IPV6, ipip4_input_node.index);
822 gm->ip4_protocol_registered = true;
823 }
824 return 0;
825}
826
827int
828ipip_del_tunnel (u32 sw_if_index)
829{
830 ipip_main_t *gm = &ipip_main;
831 vnet_main_t *vnm = gm->vnet_main;
832 ipip_tunnel_t *t;
Neale Ranns14053c92019-12-29 23:55:18 +0000833 ipip_tunnel_key_t key;
Ole Troan298c6952018-03-08 12:30:43 +0100834
835 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
836 if (t == NULL)
837 return VNET_API_ERROR_NO_SUCH_ENTRY;
838
Neale Ranns14053c92019-12-29 23:55:18 +0000839 if (t->mode == IPIP_MODE_P2MP)
Neale Ranns03ce4622020-02-03 10:55:09 +0000840 teib_walk_itf (t->sw_if_index, ipip_tunnel_delete_teib_walk, t);
Neale Ranns14053c92019-12-29 23:55:18 +0000841
Ole Troan298c6952018-03-08 12:30:43 +0100842 vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
843 gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
844 vnet_delete_hw_interface (vnm, t->hw_if_index);
Ole Troan298c6952018-03-08 12:30:43 +0100845 hash_unset (gm->instance_used, t->user_instance);
Neale Ranns14053c92019-12-29 23:55:18 +0000846
847 ipip_mk_key (t, &key);
848 ipip_tunnel_db_remove (t, &key);
Ole Troan298c6952018-03-08 12:30:43 +0100849 pool_put (gm->tunnels, t);
850
851 return 0;
852}
853
Neale Ranns03ce4622020-02-03 10:55:09 +0000854const static teib_vft_t ipip_teib_vft = {
855 .nv_added = ipip_teib_entry_added,
856 .nv_deleted = ipip_teib_entry_deleted,
Neale Ranns14053c92019-12-29 23:55:18 +0000857};
858
Ole Troan298c6952018-03-08 12:30:43 +0100859static clib_error_t *
860ipip_init (vlib_main_t * vm)
861{
862 ipip_main_t *gm = &ipip_main;
863
Dave Barachb7b92992018-10-17 10:38:51 -0400864 clib_memset (gm, 0, sizeof (gm[0]));
Ole Troan298c6952018-03-08 12:30:43 +0100865 gm->vlib_main = vm;
866 gm->vnet_main = vnet_get_main ();
867 gm->tunnel_by_key =
868 hash_create_mem (0, sizeof (ipip_tunnel_key_t), sizeof (uword));
Ole Troan298c6952018-03-08 12:30:43 +0100869
Neale Ranns03ce4622020-02-03 10:55:09 +0000870 teib_register (&ipip_teib_vft);
Neale Ranns14053c92019-12-29 23:55:18 +0000871
Ole Troan298c6952018-03-08 12:30:43 +0100872 return 0;
873}
874
875VLIB_INIT_FUNCTION (ipip_init);
876
877/*
878 * fd.io coding-style-patch-verification: ON
879 *
880 * Local Variables:
881 * eval: (c-set-style "gnu")
882 * End:
883 */