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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 fib_prefix_t dst = {
273 .fp_len = t->transport == IPIP_TRANSPORT_IP6 ? 128 : 32,
274 .fp_proto = (t->transport == IPIP_TRANSPORT_IP6 ?
275 FIB_PROTOCOL_IP6 :
276 FIB_PROTOCOL_IP4),
277 .fp_addr = t->tunnel_dst
278 };
Neale Ranns4c3ba812019-03-26 07:02:58 +0000279
280 adj_midchain_delegate_stack (ai, t->fib_index, &dst);
Ole Troan298c6952018-03-08 12:30:43 +0100281 }
Ole Troan298c6952018-03-08 12:30:43 +0100282}
283
284static adj_walk_rc_t
285ipip_adj_walk_cb (adj_index_t ai, void *ctx)
286{
287 ipip_tunnel_stack (ai);
288
289 return (ADJ_WALK_RC_CONTINUE);
290}
291
292static void
293ipip_tunnel_restack (ipip_tunnel_t * gt)
294{
295 fib_protocol_t proto;
296
297 /*
298 * walk all the adjacencies on th IPIP interface and restack them
299 */
300 FOR_EACH_FIB_IP_PROTOCOL (proto)
301 {
302 adj_nbr_walk (gt->sw_if_index, proto, ipip_adj_walk_cb, NULL);
303 }
304}
305
Neale Rannse5b94dd2019-12-31 05:13:14 +0000306static adj_midchain_fixup_t
Neale Ranns4ec36c52020-03-31 09:21:29 -0400307ipip_get_fixup (const ipip_tunnel_t * t, vnet_link_t lt, adj_flags_t * aflags)
Neale Rannse5b94dd2019-12-31 05:13:14 +0000308{
309 if (t->transport == IPIP_TRANSPORT_IP6 && lt == VNET_LINK_IP6)
310 return (ipip66_fixup);
311 if (t->transport == IPIP_TRANSPORT_IP6 && lt == VNET_LINK_IP4)
312 return (ipip46_fixup);
Neale Rannse294de62020-12-21 09:52:24 +0000313 if (t->transport == IPIP_TRANSPORT_IP6 && lt == VNET_LINK_MPLS)
314 return (ipipm6_fixup);
Neale Rannse5b94dd2019-12-31 05:13:14 +0000315 if (t->transport == IPIP_TRANSPORT_IP4 && lt == VNET_LINK_IP6)
316 return (ipip64_fixup);
Neale Rannse294de62020-12-21 09:52:24 +0000317 if (t->transport == IPIP_TRANSPORT_IP4 && lt == VNET_LINK_MPLS)
318 return (ipipm4_fixup);
Neale Rannse5b94dd2019-12-31 05:13:14 +0000319 if (t->transport == IPIP_TRANSPORT_IP4 && lt == VNET_LINK_IP4)
Neale Ranns4ec36c52020-03-31 09:21:29 -0400320 {
321 *aflags = *aflags | ADJ_FLAG_MIDCHAIN_FIXUP_IP4O4_HDR;
322 return (ipip44_fixup);
323 }
Neale Rannse5b94dd2019-12-31 05:13:14 +0000324
325 ASSERT (0);
326 return (ipip44_fixup);
327}
328
Ole Troan298c6952018-03-08 12:30:43 +0100329void
330ipip_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
331{
Neale Ranns4ec36c52020-03-31 09:21:29 -0400332 adj_midchain_fixup_t fixup;
Neale Ranns521a8d72018-12-06 13:46:49 +0000333 ipip_tunnel_t *t;
334 adj_flags_t af;
Ole Troan298c6952018-03-08 12:30:43 +0100335
Neale Ranns65d789e2021-02-08 15:24:56 +0000336 af = ADJ_FLAG_NONE;
Ole Troan298c6952018-03-08 12:30:43 +0100337 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
338 if (!t)
339 return;
340
Neale Ranns65d789e2021-02-08 15:24:56 +0000341 /*
342 * the user has not requested that the load-balancing be based on
343 * a flow hash of the inner packet. so use the stacking to choose
344 * a path.
345 */
346 if (!(t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_INNER_HASH))
347 af |= ADJ_FLAG_MIDCHAIN_IP_STACK;
Mohammed Hawari33c45f52020-11-30 13:50:24 +0100348
Neale Ranns4ec36c52020-03-31 09:21:29 -0400349 fixup = ipip_get_fixup (t, adj_get_link_type (ai), &af);
Neale Ranns14053c92019-12-29 23:55:18 +0000350 adj_nbr_midchain_update_rewrite
Neale Ranns4ec36c52020-03-31 09:21:29 -0400351 (ai, fixup,
Neale Rannse5b94dd2019-12-31 05:13:14 +0000352 uword_to_pointer (t->flags, void *), af,
Neale Ranns14053c92019-12-29 23:55:18 +0000353 ipip_build_rewrite (vnm, sw_if_index,
354 adj_get_link_type (ai), &t->tunnel_dst));
Ole Troan298c6952018-03-08 12:30:43 +0100355 ipip_tunnel_stack (ai);
356}
357
Neale Ranns14053c92019-12-29 23:55:18 +0000358typedef struct mipip_walk_ctx_t_
359{
360 const ipip_tunnel_t *t;
Neale Ranns03ce4622020-02-03 10:55:09 +0000361 const teib_entry_t *ne;
Neale Ranns14053c92019-12-29 23:55:18 +0000362} mipip_walk_ctx_t;
363
364static adj_walk_rc_t
365mipip_mk_complete_walk (adj_index_t ai, void *data)
366{
Neale Ranns4ec36c52020-03-31 09:21:29 -0400367 adj_midchain_fixup_t fixup;
Neale Ranns14053c92019-12-29 23:55:18 +0000368 mipip_walk_ctx_t *ctx = data;
Neale Ranns4ec36c52020-03-31 09:21:29 -0400369 adj_flags_t af;
370
371 af = ADJ_FLAG_NONE;
372 fixup = ipip_get_fixup (ctx->t, adj_get_link_type (ai), &af);
Neale Ranns14053c92019-12-29 23:55:18 +0000373
Neale Ranns65d789e2021-02-08 15:24:56 +0000374 /*
375 * the user has not requested that the load-balancing be based on
376 * a flow hash of the inner packet. so use the stacking to choose
377 * a path.
378 */
379 if (!(ctx->t->flags & TUNNEL_ENCAP_DECAP_FLAG_ENCAP_INNER_HASH))
380 af |= ADJ_FLAG_MIDCHAIN_IP_STACK;
Mohammed Hawari33c45f52020-11-30 13:50:24 +0100381
Neale Ranns14053c92019-12-29 23:55:18 +0000382 adj_nbr_midchain_update_rewrite
Neale Ranns4ec36c52020-03-31 09:21:29 -0400383 (ai, fixup,
Neale Rannse5b94dd2019-12-31 05:13:14 +0000384 uword_to_pointer (ctx->t->flags, void *),
Mohammed Hawari33c45f52020-11-30 13:50:24 +0100385 af, ipip_build_rewrite (vnet_get_main (),
386 ctx->t->sw_if_index,
387 adj_get_link_type (ai),
388 &teib_entry_get_nh (ctx->ne)->fp_addr));
Neale Ranns14053c92019-12-29 23:55:18 +0000389
Neale Ranns03ce4622020-02-03 10:55:09 +0000390 teib_entry_adj_stack (ctx->ne, ai);
Neale Ranns14053c92019-12-29 23:55:18 +0000391
392 return (ADJ_WALK_RC_CONTINUE);
393}
394
395static adj_walk_rc_t
396mipip_mk_incomplete_walk (adj_index_t ai, void *data)
397{
Neale Ranns4ec36c52020-03-31 09:21:29 -0400398 adj_midchain_fixup_t fixup;
Neale Ranns14053c92019-12-29 23:55:18 +0000399 ipip_tunnel_t *t = data;
Neale Ranns4ec36c52020-03-31 09:21:29 -0400400 adj_flags_t af;
Neale Ranns14053c92019-12-29 23:55:18 +0000401
Neale Ranns4ec36c52020-03-31 09:21:29 -0400402 af = ADJ_FLAG_NONE;
403 fixup = ipip_get_fixup (t, adj_get_link_type (ai), &af);
404
405 adj_nbr_midchain_update_rewrite (ai, fixup, NULL, ADJ_FLAG_NONE, NULL);
Neale Ranns14053c92019-12-29 23:55:18 +0000406
407 adj_midchain_delegate_unstack (ai);
408
409 return (ADJ_WALK_RC_CONTINUE);
410}
411
412void
413mipip_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
414{
415 ipip_main_t *gm = &ipip_main;
Neale Ranns4ec36c52020-03-31 09:21:29 -0400416 adj_midchain_fixup_t fixup;
Neale Ranns14053c92019-12-29 23:55:18 +0000417 ip_adjacency_t *adj;
Neale Ranns03ce4622020-02-03 10:55:09 +0000418 teib_entry_t *ne;
Neale Ranns14053c92019-12-29 23:55:18 +0000419 ipip_tunnel_t *t;
Neale Ranns4ec36c52020-03-31 09:21:29 -0400420 adj_flags_t af;
Neale Ranns14053c92019-12-29 23:55:18 +0000421 u32 ti;
422
Neale Ranns4ec36c52020-03-31 09:21:29 -0400423 af = ADJ_FLAG_NONE;
Neale Ranns14053c92019-12-29 23:55:18 +0000424 adj = adj_get (ai);
425 ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
426 t = pool_elt_at_index (gm->tunnels, ti);
Neale Ranns14053c92019-12-29 23:55:18 +0000427
Neale Rannse6b83052020-09-17 12:56:47 +0000428 ne = teib_entry_find_46 (sw_if_index,
429 adj->ia_nh_proto, &adj->sub_type.nbr.next_hop);
Neale Ranns14053c92019-12-29 23:55:18 +0000430
431 if (NULL == ne)
432 {
Neale Ranns4ec36c52020-03-31 09:21:29 -0400433 // no TEIB entry to provide the next-hop
434 fixup = ipip_get_fixup (t, adj_get_link_type (ai), &af);
Neale Ranns14053c92019-12-29 23:55:18 +0000435 adj_nbr_midchain_update_rewrite
Neale Ranns4ec36c52020-03-31 09:21:29 -0400436 (ai, fixup, uword_to_pointer (t->flags, void *), ADJ_FLAG_NONE, NULL);
Neale Ranns14053c92019-12-29 23:55:18 +0000437 return;
438 }
439
440 mipip_walk_ctx_t ctx = {
441 .t = t,
442 .ne = ne
443 };
444 adj_nbr_walk_nh (sw_if_index,
445 adj->ia_nh_proto,
446 &adj->sub_type.nbr.next_hop, mipip_mk_complete_walk, &ctx);
447}
448
Ole Troan298c6952018-03-08 12:30:43 +0100449static u8 *
450format_ipip_tunnel_name (u8 * s, va_list * args)
451{
452 u32 dev_instance = va_arg (*args, u32);
453 ipip_main_t *gm = &ipip_main;
454 ipip_tunnel_t *t;
455
456 if (dev_instance >= vec_len (gm->tunnels))
457 return format (s, "<improperly-referenced>");
458
459 t = pool_elt_at_index (gm->tunnels, dev_instance);
460 return format (s, "ipip%d", t->user_instance);
461}
462
463static u8 *
464format_ipip_device (u8 * s, va_list * args)
465{
466 u32 dev_instance = va_arg (*args, u32);
467 CLIB_UNUSED (int verbose) = va_arg (*args, int);
468
469 s = format (s, "IPIP tunnel: id %d\n", dev_instance);
470 return s;
471}
472
473static clib_error_t *
474ipip_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
475{
476 vnet_hw_interface_t *hi;
477 ipip_tunnel_t *t;
478
479 hi = vnet_get_hw_interface (vnm, hw_if_index);
480
481 t = ipip_tunnel_db_find_by_sw_if_index (hi->sw_if_index);
482 if (!t)
483 return 0;
484
485 if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
486 vnet_hw_interface_set_flags (vnm, hw_if_index,
487 VNET_HW_INTERFACE_FLAG_LINK_UP);
488 else
489 vnet_hw_interface_set_flags (vnm, hw_if_index, 0 /* down */ );
490
491 ipip_tunnel_restack (t);
492
493 return /* no error */ 0;
494}
495
Neale Rannsc87b66c2019-02-07 07:26:12 -0800496static int
497ipip_tunnel_desc (u32 sw_if_index,
498 ip46_address_t * src, ip46_address_t * dst, u8 * is_l2)
499{
500 ipip_tunnel_t *t;
501
502 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
503 if (!t)
504 return -1;
505
506 *src = t->tunnel_src;
507 *dst = t->tunnel_dst;
508 *is_l2 = 0;
509
510 return (0);
511}
512
Ole Troan298c6952018-03-08 12:30:43 +0100513VNET_DEVICE_CLASS(ipip_device_class) = {
514 .name = "IPIP tunnel device",
515 .format_device_name = format_ipip_tunnel_name,
516 .format_device = format_ipip_device,
517 .format_tx_trace = format_ipip_tx_trace,
518 .admin_up_down_function = ipip_interface_admin_up_down,
Neale Rannsc87b66c2019-02-07 07:26:12 -0800519 .ip_tun_desc = ipip_tunnel_desc,
Ole Troan298c6952018-03-08 12:30:43 +0100520#ifdef SOON
521 .clear counter = 0;
522#endif
523};
524
525VNET_HW_INTERFACE_CLASS(ipip_hw_interface_class) = {
526 .name = "IPIP",
527 //.format_header = format_ipip_header_with_length,
528 //.unformat_header = unformat_ipip_header,
529 .build_rewrite = ipip_build_rewrite,
530 .update_adjacency = ipip_update_adj,
531 .flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
532};
Neale Ranns14053c92019-12-29 23:55:18 +0000533
534VNET_HW_INTERFACE_CLASS(mipip_hw_interface_class) = {
535 .name = "mIPIP",
536 //.format_header = format_ipip_header_with_length,
537 //.unformat_header = unformat_ipip_header,
538 .build_rewrite = ipip_build_rewrite,
539 .update_adjacency = mipip_update_adj,
540 .flags = VNET_HW_INTERFACE_CLASS_FLAG_NBMA,
541};
Ole Troan298c6952018-03-08 12:30:43 +0100542
543ipip_tunnel_t *
Neale Ranns14053c92019-12-29 23:55:18 +0000544ipip_tunnel_db_find (const ipip_tunnel_key_t * key)
Ole Troan298c6952018-03-08 12:30:43 +0100545{
546 ipip_main_t *gm = &ipip_main;
547 uword *p;
548
549 p = hash_get_mem (gm->tunnel_by_key, key);
550 if (!p)
551 return (NULL);
552 return (pool_elt_at_index (gm->tunnels, p[0]));
553}
554
555ipip_tunnel_t *
556ipip_tunnel_db_find_by_sw_if_index (u32 sw_if_index)
557{
558 ipip_main_t *gm = &ipip_main;
Eyal Baricd307742018-07-22 12:45:15 +0300559 if (vec_len (gm->tunnel_index_by_sw_if_index) <= sw_if_index)
Ole Troan298c6952018-03-08 12:30:43 +0100560 return NULL;
561 u32 ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
562 if (ti == ~0)
563 return NULL;
564 return pool_elt_at_index (gm->tunnels, ti);
565}
566
567void
Neale Ranns14053c92019-12-29 23:55:18 +0000568ipip_tunnel_db_add (ipip_tunnel_t * t, const ipip_tunnel_key_t * key)
Ole Troan298c6952018-03-08 12:30:43 +0100569{
570 ipip_main_t *gm = &ipip_main;
571
Neale Ranns14053c92019-12-29 23:55:18 +0000572 hash_set_mem_alloc (&gm->tunnel_by_key, key, t->dev_instance);
Ole Troan298c6952018-03-08 12:30:43 +0100573}
574
575void
Neale Ranns14053c92019-12-29 23:55:18 +0000576ipip_tunnel_db_remove (ipip_tunnel_t * t, const ipip_tunnel_key_t * key)
Ole Troan298c6952018-03-08 12:30:43 +0100577{
578 ipip_main_t *gm = &ipip_main;
579
Neale Ranns14053c92019-12-29 23:55:18 +0000580 hash_unset_mem_free (&gm->tunnel_by_key, key);
581}
582
583void
584ipip_mk_key_i (ipip_transport_t transport,
585 ipip_mode_t mode,
586 const ip46_address_t * src,
587 const ip46_address_t * dst,
588 u32 fib_index, ipip_tunnel_key_t * key)
589{
590 key->transport = transport;
591 key->mode = mode;
592 key->src = *src;
593 key->dst = *dst;
594 key->fib_index = fib_index;
595 key->__pad = 0;;
596}
597
598void
599ipip_mk_key (const ipip_tunnel_t * t, ipip_tunnel_key_t * key)
600{
601 ipip_mk_key_i (t->transport, t->mode,
602 &t->tunnel_src, &t->tunnel_dst, t->fib_index, key);
603}
604
605static void
Neale Ranns03ce4622020-02-03 10:55:09 +0000606ipip_teib_mk_key (const ipip_tunnel_t * t,
607 const teib_entry_t * ne, ipip_tunnel_key_t * key)
Neale Ranns14053c92019-12-29 23:55:18 +0000608{
609 const fib_prefix_t *nh;
610
Neale Ranns03ce4622020-02-03 10:55:09 +0000611 nh = teib_entry_get_nh (ne);
Neale Ranns14053c92019-12-29 23:55:18 +0000612
613 /* construct the key using mode P2P so it can be found in the DP */
614 ipip_mk_key_i (t->transport, IPIP_MODE_P2P,
615 &t->tunnel_src, &nh->fp_addr,
Neale Ranns03ce4622020-02-03 10:55:09 +0000616 teib_entry_get_fib_index (ne), key);
Neale Ranns14053c92019-12-29 23:55:18 +0000617}
618
619static void
Neale Ranns03ce4622020-02-03 10:55:09 +0000620ipip_teib_entry_added (const teib_entry_t * ne)
Neale Ranns14053c92019-12-29 23:55:18 +0000621{
622 ipip_main_t *gm = &ipip_main;
Neale Rannse6b83052020-09-17 12:56:47 +0000623 const ip_address_t *nh;
Neale Ranns14053c92019-12-29 23:55:18 +0000624 ipip_tunnel_key_t key;
625 ipip_tunnel_t *t;
626 u32 sw_if_index;
627 u32 t_idx;
628
Neale Ranns03ce4622020-02-03 10:55:09 +0000629 sw_if_index = teib_entry_get_sw_if_index (ne);
Neale Ranns14053c92019-12-29 23:55:18 +0000630 if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
631 return;
632
633 t_idx = gm->tunnel_index_by_sw_if_index[sw_if_index];
634
635 if (INDEX_INVALID == t_idx)
636 return;
637
638 t = pool_elt_at_index (gm->tunnels, t_idx);
639
Neale Ranns03ce4622020-02-03 10:55:09 +0000640 ipip_teib_mk_key (t, ne, &key);
Neale Ranns14053c92019-12-29 23:55:18 +0000641 ipip_tunnel_db_add (t, &key);
642
643 // update the rewrites for each of the adjacencies for this next-hop
644 mipip_walk_ctx_t ctx = {
645 .t = t,
646 .ne = ne
647 };
Neale Ranns03ce4622020-02-03 10:55:09 +0000648 nh = teib_entry_get_peer (ne);
649 adj_nbr_walk_nh (teib_entry_get_sw_if_index (ne),
Neale Rannse6b83052020-09-17 12:56:47 +0000650 (AF_IP4 == ip_addr_version (nh) ?
Neale Ranns14053c92019-12-29 23:55:18 +0000651 FIB_PROTOCOL_IP4 :
Neale Rannse6b83052020-09-17 12:56:47 +0000652 FIB_PROTOCOL_IP6),
653 &ip_addr_46 (nh), mipip_mk_complete_walk, &ctx);
Neale Ranns14053c92019-12-29 23:55:18 +0000654}
655
656static void
Neale Ranns03ce4622020-02-03 10:55:09 +0000657ipip_teib_entry_deleted (const teib_entry_t * ne)
Neale Ranns14053c92019-12-29 23:55:18 +0000658{
659 ipip_main_t *gm = &ipip_main;
Neale Rannse6b83052020-09-17 12:56:47 +0000660 const ip_address_t *nh;
Neale Ranns14053c92019-12-29 23:55:18 +0000661 ipip_tunnel_key_t key;
662 ipip_tunnel_t *t;
663 u32 sw_if_index;
664 u32 t_idx;
665
Neale Ranns03ce4622020-02-03 10:55:09 +0000666 sw_if_index = teib_entry_get_sw_if_index (ne);
Neale Ranns14053c92019-12-29 23:55:18 +0000667 if (vec_len (gm->tunnel_index_by_sw_if_index) < sw_if_index)
668 return;
669
670 t_idx = gm->tunnel_index_by_sw_if_index[sw_if_index];
671
672 if (INDEX_INVALID == t_idx)
673 return;
674
675 t = pool_elt_at_index (gm->tunnels, t_idx);
676
Neale Ranns03ce4622020-02-03 10:55:09 +0000677 ipip_teib_mk_key (t, ne, &key);
Neale Ranns14053c92019-12-29 23:55:18 +0000678 ipip_tunnel_db_remove (t, &key);
679
Neale Ranns03ce4622020-02-03 10:55:09 +0000680 nh = teib_entry_get_peer (ne);
Neale Ranns14053c92019-12-29 23:55:18 +0000681
682 /* make all the adjacencies incomplete */
Neale Ranns03ce4622020-02-03 10:55:09 +0000683 adj_nbr_walk_nh (teib_entry_get_sw_if_index (ne),
Neale Rannse6b83052020-09-17 12:56:47 +0000684 (AF_IP4 == ip_addr_version (nh) ?
Neale Ranns14053c92019-12-29 23:55:18 +0000685 FIB_PROTOCOL_IP4 :
Neale Rannse6b83052020-09-17 12:56:47 +0000686 FIB_PROTOCOL_IP6),
687 &ip_addr_46 (nh), mipip_mk_incomplete_walk, t);
Neale Ranns14053c92019-12-29 23:55:18 +0000688}
689
690static walk_rc_t
Neale Ranns03ce4622020-02-03 10:55:09 +0000691ipip_tunnel_delete_teib_walk (index_t nei, void *ctx)
Neale Ranns14053c92019-12-29 23:55:18 +0000692{
693 ipip_tunnel_t *t = ctx;
694 ipip_tunnel_key_t key;
695
Neale Ranns03ce4622020-02-03 10:55:09 +0000696 ipip_teib_mk_key (t, teib_entry_get (nei), &key);
Neale Ranns14053c92019-12-29 23:55:18 +0000697 ipip_tunnel_db_remove (t, &key);
698
699 return (WALK_CONTINUE);
700}
701
702static walk_rc_t
Neale Ranns03ce4622020-02-03 10:55:09 +0000703ipip_tunnel_add_teib_walk (index_t nei, void *ctx)
Neale Ranns14053c92019-12-29 23:55:18 +0000704{
705 ipip_tunnel_t *t = ctx;
706 ipip_tunnel_key_t key;
707
Neale Ranns03ce4622020-02-03 10:55:09 +0000708 ipip_teib_mk_key (t, teib_entry_get (nei), &key);
Neale Ranns14053c92019-12-29 23:55:18 +0000709 ipip_tunnel_db_add (t, &key);
710
711 return (WALK_CONTINUE);
Ole Troan298c6952018-03-08 12:30:43 +0100712}
713
Ole Troan298c6952018-03-08 12:30:43 +0100714int
715ipip_add_tunnel (ipip_transport_t transport,
716 u32 instance, ip46_address_t * src, ip46_address_t * dst,
Neale Ranns59ff9182019-12-29 23:55:18 +0000717 u32 fib_index, tunnel_encap_decap_flags_t flags,
Neale Ranns14053c92019-12-29 23:55:18 +0000718 ip_dscp_t dscp, tunnel_mode_t tmode, u32 * sw_if_indexp)
Ole Troan298c6952018-03-08 12:30:43 +0100719{
720 ipip_main_t *gm = &ipip_main;
721 vnet_main_t *vnm = gm->vnet_main;
Ole Troan298c6952018-03-08 12:30:43 +0100722 ipip_tunnel_t *t;
723 vnet_hw_interface_t *hi;
724 u32 hw_if_index, sw_if_index;
Neale Ranns14053c92019-12-29 23:55:18 +0000725 ipip_tunnel_key_t key;
726 ipip_mode_t mode;
727
728 if (tmode == TUNNEL_MODE_MP && !ip46_address_is_zero (dst))
729 return (VNET_API_ERROR_INVALID_DST_ADDRESS);
730
731 mode = (tmode == TUNNEL_MODE_P2P ? IPIP_MODE_P2P : IPIP_MODE_P2MP);
732 ipip_mk_key_i (transport, mode, src, dst, fib_index, &key);
733
Ole Troan298c6952018-03-08 12:30:43 +0100734 t = ipip_tunnel_db_find (&key);
735 if (t)
Filip Tehlar4c6b1b62019-11-30 20:49:40 +0000736 {
737 if (sw_if_indexp)
738 sw_if_indexp[0] = t->sw_if_index;
739 return VNET_API_ERROR_IF_ALREADY_EXISTS;
740 }
Ole Troan298c6952018-03-08 12:30:43 +0100741
742 pool_get_aligned (gm->tunnels, t, CLIB_CACHE_LINE_BYTES);
Dave Barachb7b92992018-10-17 10:38:51 -0400743 clib_memset (t, 0, sizeof (*t));
Ole Troan298c6952018-03-08 12:30:43 +0100744
745 /* Reconcile the real dev_instance and a possible requested instance */
746 u32 t_idx = t - gm->tunnels; /* tunnel index (or instance) */
747 u32 u_idx = instance; /* user specified instance */
748 if (u_idx == ~0)
749 u_idx = t_idx;
750 if (hash_get (gm->instance_used, u_idx))
751 {
752 pool_put (gm->tunnels, t);
753 return VNET_API_ERROR_INSTANCE_IN_USE;
754 }
755 hash_set (gm->instance_used, u_idx, 1);
756
757 t->dev_instance = t_idx; /* actual */
758 t->user_instance = u_idx; /* name */
Ole Troan298c6952018-03-08 12:30:43 +0100759
760 hw_if_index = vnet_register_interface (vnm, ipip_device_class.index, t_idx,
Neale Ranns14053c92019-12-29 23:55:18 +0000761 (mode == IPIP_MODE_P2P ?
762 ipip_hw_interface_class.index :
763 mipip_hw_interface_class.index),
Ole Troan298c6952018-03-08 12:30:43 +0100764 t_idx);
765
766 hi = vnet_get_hw_interface (vnm, hw_if_index);
767 sw_if_index = hi->sw_if_index;
768
Neale Ranns14053c92019-12-29 23:55:18 +0000769 t->mode = mode;
Ole Troan298c6952018-03-08 12:30:43 +0100770 t->hw_if_index = hw_if_index;
771 t->fib_index = fib_index;
772 t->sw_if_index = sw_if_index;
Neale Ranns95346962019-11-25 13:04:44 +0000773 t->dscp = dscp;
774 t->flags = flags;
Ole Troan298c6952018-03-08 12:30:43 +0100775 t->transport = transport;
Neale Ranns95346962019-11-25 13:04:44 +0000776
Ole Troan298c6952018-03-08 12:30:43 +0100777 vec_validate_init_empty (gm->tunnel_index_by_sw_if_index, sw_if_index, ~0);
778 gm->tunnel_index_by_sw_if_index[sw_if_index] = t_idx;
779
780 if (t->transport == IPIP_TRANSPORT_IP4)
Damjan Marion1cd0e5d2022-01-17 14:49:17 +0100781 hi->frame_overhead = sizeof (ip4_header_t);
Ole Troan298c6952018-03-08 12:30:43 +0100782 else
Damjan Marion1cd0e5d2022-01-17 14:49:17 +0100783 hi->frame_overhead = sizeof (ip6_header_t);
784
785 hi->min_frame_size = hi->frame_overhead + 64;
Ole Troan298c6952018-03-08 12:30:43 +0100786
Damjan Marionfe7d4a22018-04-13 19:43:39 +0200787 /* Standard default ipip MTU. */
Ole Troand7231612018-06-07 10:17:57 +0200788 vnet_sw_interface_set_mtu (vnm, sw_if_index, 9000);
Neale Ranns6fdcc3d2021-10-08 07:30:47 +0000789 vnet_set_interface_l3_output_node (gm->vlib_main, sw_if_index,
790 (u8 *) "tunnel-output");
Ole Troan298c6952018-03-08 12:30:43 +0100791
792 t->tunnel_src = *src;
793 t->tunnel_dst = *dst;
794
795 ipip_tunnel_db_add (t, &key);
796
Neale Ranns14053c92019-12-29 23:55:18 +0000797 if (t->mode == IPIP_MODE_P2MP)
Neale Ranns03ce4622020-02-03 10:55:09 +0000798 teib_walk_itf (t->sw_if_index, ipip_tunnel_add_teib_walk, t);
Neale Ranns14053c92019-12-29 23:55:18 +0000799
Ole Troan298c6952018-03-08 12:30:43 +0100800 if (sw_if_indexp)
801 *sw_if_indexp = sw_if_index;
802
803 if (t->transport == IPIP_TRANSPORT_IP6 && !gm->ip6_protocol_registered)
804 {
805 ip6_register_protocol (IP_PROTOCOL_IP_IN_IP, ipip6_input_node.index);
Neale Rannse294de62020-12-21 09:52:24 +0000806 ip6_register_protocol (IP_PROTOCOL_MPLS_IN_IP, ipip6_input_node.index);
Ole Troan298c6952018-03-08 12:30:43 +0100807 ip6_register_protocol (IP_PROTOCOL_IPV6, ipip6_input_node.index);
808 gm->ip6_protocol_registered = true;
809 }
810 else if (t->transport == IPIP_TRANSPORT_IP4 && !gm->ip4_protocol_registered)
811 {
812 ip4_register_protocol (IP_PROTOCOL_IP_IN_IP, ipip4_input_node.index);
Neale Rannse294de62020-12-21 09:52:24 +0000813 ip4_register_protocol (IP_PROTOCOL_MPLS_IN_IP, ipip4_input_node.index);
Ole Troan298c6952018-03-08 12:30:43 +0100814 ip4_register_protocol (IP_PROTOCOL_IPV6, ipip4_input_node.index);
815 gm->ip4_protocol_registered = true;
816 }
817 return 0;
818}
819
820int
821ipip_del_tunnel (u32 sw_if_index)
822{
823 ipip_main_t *gm = &ipip_main;
824 vnet_main_t *vnm = gm->vnet_main;
825 ipip_tunnel_t *t;
Neale Ranns14053c92019-12-29 23:55:18 +0000826 ipip_tunnel_key_t key;
Ole Troan298c6952018-03-08 12:30:43 +0100827
828 t = ipip_tunnel_db_find_by_sw_if_index (sw_if_index);
829 if (t == NULL)
830 return VNET_API_ERROR_NO_SUCH_ENTRY;
831
Neale Ranns14053c92019-12-29 23:55:18 +0000832 if (t->mode == IPIP_MODE_P2MP)
Neale Ranns03ce4622020-02-03 10:55:09 +0000833 teib_walk_itf (t->sw_if_index, ipip_tunnel_delete_teib_walk, t);
Neale Ranns14053c92019-12-29 23:55:18 +0000834
Ole Troan298c6952018-03-08 12:30:43 +0100835 vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
Neale Ranns6fdcc3d2021-10-08 07:30:47 +0000836 vnet_reset_interface_l3_output_node (gm->vlib_main, t->sw_if_index);
Ole Troan298c6952018-03-08 12:30:43 +0100837 gm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
838 vnet_delete_hw_interface (vnm, t->hw_if_index);
Ole Troan298c6952018-03-08 12:30:43 +0100839 hash_unset (gm->instance_used, t->user_instance);
Neale Ranns14053c92019-12-29 23:55:18 +0000840
841 ipip_mk_key (t, &key);
842 ipip_tunnel_db_remove (t, &key);
Ole Troan298c6952018-03-08 12:30:43 +0100843 pool_put (gm->tunnels, t);
844
845 return 0;
846}
847
Neale Ranns03ce4622020-02-03 10:55:09 +0000848const static teib_vft_t ipip_teib_vft = {
849 .nv_added = ipip_teib_entry_added,
850 .nv_deleted = ipip_teib_entry_deleted,
Neale Ranns14053c92019-12-29 23:55:18 +0000851};
852
Ole Troan298c6952018-03-08 12:30:43 +0100853static clib_error_t *
854ipip_init (vlib_main_t * vm)
855{
856 ipip_main_t *gm = &ipip_main;
857
Dave Barachb7b92992018-10-17 10:38:51 -0400858 clib_memset (gm, 0, sizeof (gm[0]));
Ole Troan298c6952018-03-08 12:30:43 +0100859 gm->vlib_main = vm;
860 gm->vnet_main = vnet_get_main ();
861 gm->tunnel_by_key =
862 hash_create_mem (0, sizeof (ipip_tunnel_key_t), sizeof (uword));
Ole Troan298c6952018-03-08 12:30:43 +0100863
Neale Ranns03ce4622020-02-03 10:55:09 +0000864 teib_register (&ipip_teib_vft);
Neale Ranns14053c92019-12-29 23:55:18 +0000865
Ole Troan298c6952018-03-08 12:30:43 +0100866 return 0;
867}
868
869VLIB_INIT_FUNCTION (ipip_init);
870
871/*
872 * fd.io coding-style-patch-verification: ON
873 *
874 * Local Variables:
875 * eval: (c-set-style "gnu")
876 * End:
877 */