blob: c1bd2aa3bf7a5cd265e548bbaee984523ed55e1d [file] [log] [blame]
Ed Warnickecb9cada2015-12-08 15:45:58 -07001/*
2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * 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 */
15/*
16 * ip6/packet.h: ip6 packet format
17 *
18 * Copyright (c) 2008 Eliot Dresselhaus
19 *
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
27 *
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
30 *
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
38 */
39
40#ifndef included_ip6_packet_h
41#define included_ip6_packet_h
42
Dave Barach68b0fb02017-02-28 15:15:56 -050043#include <vnet/tcp/tcp_packet.h>
Pierre Pfister1dabaaf2016-04-25 14:15:15 +010044#include <vnet/ip/ip4_packet.h>
45
Dave Barachd7cb1b52016-12-09 09:52:16 -050046typedef union
47{
Ed Warnickecb9cada2015-12-08 15:45:58 -070048 u8 as_u8[16];
49 u16 as_u16[8];
50 u32 as_u32[4];
51 u64 as_u64[2];
52 uword as_uword[16 / sizeof (uword)];
Dave Barachd7cb1b52016-12-09 09:52:16 -050053}
54ip6_address_t;
Ed Warnickecb9cada2015-12-08 15:45:58 -070055
Damjan Mariona35cc142018-03-16 01:25:27 +010056typedef struct
57{
58 ip6_address_t addr, mask;
59} ip6_address_and_mask_t;
60
Ed Warnickecb9cada2015-12-08 15:45:58 -070061/* Packed so that the mhash key doesn't include uninitialized pad bytes */
Dave Barachd7cb1b52016-12-09 09:52:16 -050062/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -070063typedef CLIB_PACKED (struct {
64 /* IP address must be first for ip_interface_address_get_address() to work */
65 ip6_address_t ip6_addr;
66 u32 fib_index;
67}) ip6_address_fib_t;
Dave Barachd7cb1b52016-12-09 09:52:16 -050068/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -070069
Neale Rannsd0df49f2018-08-08 01:06:40 -070070typedef enum
71{
72 IP46_TYPE_ANY,
73 IP46_TYPE_IP4,
74 IP46_TYPE_IP6
75} ip46_type_t;
76
Dave Barachd7cb1b52016-12-09 09:52:16 -050077/* *INDENT-OFF* */
Neale Rannsc87b66c2019-02-07 07:26:12 -080078typedef CLIB_PACKED (union ip46_address_t_ {
Pierre Pfister1dabaaf2016-04-25 14:15:15 +010079 struct {
80 u32 pad[3];
81 ip4_address_t ip4;
82 };
83 ip6_address_t ip6;
Eyal Baric5b13602016-11-24 19:42:43 +020084 u8 as_u8[16];
Damjan Marion1a64ab92016-04-29 14:51:57 +020085 u64 as_u64[2];
Pierre Pfister1dabaaf2016-04-25 14:15:15 +010086}) ip46_address_t;
Dave Barachd7cb1b52016-12-09 09:52:16 -050087/* *INDENT-ON* */
Damjan Marion1a64ab92016-04-29 14:51:57 +020088#define ip46_address_is_ip4(ip46) (((ip46)->pad[0] | (ip46)->pad[1] | (ip46)->pad[2]) == 0)
89#define ip46_address_mask_ip4(ip46) ((ip46)->pad[0] = (ip46)->pad[1] = (ip46)->pad[2] = 0)
90#define ip46_address_set_ip4(ip46, ip) (ip46_address_mask_ip4(ip46), (ip46)->ip4 = (ip)[0])
91#define ip46_address_reset(ip46) ((ip46)->as_u64[0] = (ip46)->as_u64[1] = 0)
Neale Ranns0bfe5d82016-08-25 15:29:12 +010092#define ip46_address_cmp(ip46_1, ip46_2) (memcmp(ip46_1, ip46_2, sizeof(*ip46_1)))
93#define ip46_address_is_zero(ip46) (((ip46)->as_u64[0] == 0) && ((ip46)->as_u64[1] == 0))
Neale Ranns3466c302017-02-16 07:45:03 -080094#define ip46_address_is_equal(a1, a2) (((a1)->as_u64[0] == (a2)->as_u64[0]) \
95 && ((a1)->as_u64[1] == (a2)->as_u64[1]))
Neale Ranns0bdd3192018-09-07 11:04:52 -070096#define ip46_address_initializer {{{ 0 }}}
97
Neale Rannsc87b66c2019-02-07 07:26:12 -080098static_always_inline int
99ip46_address_is_equal_v4 (const ip46_address_t * ip46,
100 const ip4_address_t * ip4)
101{
102 return (ip46->ip4.as_u32 == ip4->as_u32);
103}
104
105static_always_inline int
106ip46_address_is_equal_v6 (const ip46_address_t * ip46,
107 const ip6_address_t * ip6)
108{
109 return ((ip46->ip6.as_u64[0] == ip6->as_u64[0]) &&
110 (ip46->ip6.as_u64[1] == ip6->as_u64[1]));
111}
112
Neale Rannsc0a93142018-09-05 15:42:26 -0700113static_always_inline void
114ip46_address_copy (ip46_address_t * dst, const ip46_address_t * src)
115{
116 dst->as_u64[0] = src->as_u64[0];
117 dst->as_u64[1] = src->as_u64[1];
118}
119
Neale Ranns0bdd3192018-09-07 11:04:52 -0700120static_always_inline void
121ip46_address_set_ip6 (ip46_address_t * dst, const ip6_address_t * src)
122{
123 dst->as_u64[0] = src->as_u64[0];
124 dst->as_u64[1] = src->as_u64[1];
125}
Pierre Pfister1dabaaf2016-04-25 14:15:15 +0100126
Eyal Barie101e1f2017-03-15 08:23:42 +0200127always_inline ip46_address_t
128to_ip46 (u32 is_ipv6, u8 * buf)
Eyal Baric5b13602016-11-24 19:42:43 +0200129{
Eyal Barie101e1f2017-03-15 08:23:42 +0200130 ip46_address_t ip;
Eyal Baric5b13602016-11-24 19:42:43 +0200131 if (is_ipv6)
Eyal Barie101e1f2017-03-15 08:23:42 +0200132 ip.ip6 = *((ip6_address_t *) buf);
Eyal Baric5b13602016-11-24 19:42:43 +0200133 else
Eyal Barie101e1f2017-03-15 08:23:42 +0200134 ip46_address_set_ip4 (&ip, (ip4_address_t *) buf);
135 return ip;
Eyal Baric5b13602016-11-24 19:42:43 +0200136}
137
Eyal Barie101e1f2017-03-15 08:23:42 +0200138
Eyal Baric5b13602016-11-24 19:42:43 +0200139always_inline void
Neale Rannsd69f4392018-08-31 06:30:16 -0400140ip6_addr_fib_init (ip6_address_fib_t * addr_fib,
141 const ip6_address_t * address, u32 fib_index)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700142{
Eyal Barie101e1f2017-03-15 08:23:42 +0200143 addr_fib->ip6_addr = *address;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700144 addr_fib->fib_index = fib_index;
145}
146
147/* Special addresses:
148 unspecified ::/128
149 loopback ::1/128
150 global unicast 2000::/3
151 unique local unicast fc00::/7
152 link local unicast fe80::/10
153 multicast ff00::/8
154 ietf reserved everything else. */
Dave Barachd7cb1b52016-12-09 09:52:16 -0500155
Ed Warnickecb9cada2015-12-08 15:45:58 -0700156#define foreach_ip6_multicast_address_scope \
157 _ (loopback, 0x1) \
158 _ (link_local, 0x2) \
159 _ (admin_local, 0x4) \
160 _ (site_local, 0x5) \
161 _ (organization_local, 0x8) \
162 _ (global, 0xe)
163
164#define foreach_ip6_multicast_link_local_group_id \
165 _ (all_hosts, 0x1) \
166 _ (all_routers, 0x2) \
167 _ (rip_routers, 0x9) \
168 _ (eigrp_routers, 0xa) \
169 _ (pim_routers, 0xd) \
170 _ (mldv2_routers, 0x16)
171
Dave Barachd7cb1b52016-12-09 09:52:16 -0500172typedef enum
173{
Ed Warnickecb9cada2015-12-08 15:45:58 -0700174#define _(f,n) IP6_MULTICAST_SCOPE_##f = n,
175 foreach_ip6_multicast_address_scope
176#undef _
177} ip6_multicast_address_scope_t;
178
Dave Barachd7cb1b52016-12-09 09:52:16 -0500179typedef enum
180{
Ed Warnickecb9cada2015-12-08 15:45:58 -0700181#define _(f,n) IP6_MULTICAST_GROUP_ID_##f = n,
182 foreach_ip6_multicast_link_local_group_id
183#undef _
184} ip6_multicast_link_local_group_id_t;
185
186always_inline uword
Neale Rannsd69f4392018-08-31 06:30:16 -0400187ip6_address_is_multicast (const ip6_address_t * a)
Dave Barachd7cb1b52016-12-09 09:52:16 -0500188{
189 return a->as_u8[0] == 0xff;
190}
Ed Warnickecb9cada2015-12-08 15:45:58 -0700191
Eyal Baric5b13602016-11-24 19:42:43 +0200192always_inline uword
Neale Rannsd69f4392018-08-31 06:30:16 -0400193ip46_address_is_multicast (const ip46_address_t * a)
Eyal Baric5b13602016-11-24 19:42:43 +0200194{
Dave Barachd7cb1b52016-12-09 09:52:16 -0500195 return ip46_address_is_ip4 (a) ? ip4_address_is_multicast (&a->ip4) :
196 ip6_address_is_multicast (&a->ip6);
Eyal Baric5b13602016-11-24 19:42:43 +0200197}
198
Ed Warnickecb9cada2015-12-08 15:45:58 -0700199always_inline void
Neale Ranns37029302018-08-10 05:30:06 -0700200ip6_address_copy (ip6_address_t * dst, const ip6_address_t * src)
201{
202 dst->as_u64[0] = src->as_u64[0];
203 dst->as_u64[1] = src->as_u64[1];
204}
205
206always_inline void
Ed Warnickecb9cada2015-12-08 15:45:58 -0700207ip6_set_reserved_multicast_address (ip6_address_t * a,
208 ip6_multicast_address_scope_t scope,
209 u16 id)
210{
211 a->as_u64[0] = a->as_u64[1] = 0;
212 a->as_u16[0] = clib_host_to_net_u16 (0xff00 | scope);
213 a->as_u16[7] = clib_host_to_net_u16 (id);
214}
215
216always_inline void
217ip6_set_solicited_node_multicast_address (ip6_address_t * a, u32 id)
218{
219 /* 0xff02::1:ffXX:XXXX. */
220 a->as_u64[0] = a->as_u64[1] = 0;
221 a->as_u16[0] = clib_host_to_net_u16 (0xff02);
222 a->as_u8[11] = 1;
223 ASSERT ((id >> 24) == 0);
224 id |= 0xff << 24;
225 a->as_u32[3] = clib_host_to_net_u32 (id);
226}
227
228always_inline void
Ed Warnickecb9cada2015-12-08 15:45:58 -0700229ip6_multicast_ethernet_address (u8 * ethernet_address, u32 group_id)
230{
231 ethernet_address[0] = 0x33;
232 ethernet_address[1] = 0x33;
233 ethernet_address[2] = ((group_id >> 24) & 0xff);
234 ethernet_address[3] = ((group_id >> 16) & 0xff);
Dave Barachd7cb1b52016-12-09 09:52:16 -0500235 ethernet_address[4] = ((group_id >> 8) & 0xff);
236 ethernet_address[5] = ((group_id >> 0) & 0xff);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700237}
238
239always_inline uword
Neale Rannsd69f4392018-08-31 06:30:16 -0400240ip6_address_is_equal (const ip6_address_t * a, const ip6_address_t * b)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700241{
242 int i;
243 for (i = 0; i < ARRAY_LEN (a->as_uword); i++)
244 if (a->as_uword[i] != b->as_uword[i])
245 return 0;
246 return 1;
247}
248
249always_inline uword
Neale Rannsd69f4392018-08-31 06:30:16 -0400250ip6_address_is_equal_masked (const ip6_address_t * a,
251 const ip6_address_t * b,
252 const ip6_address_t * mask)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700253{
254 int i;
255 for (i = 0; i < ARRAY_LEN (a->as_uword); i++)
256 {
257 uword a_masked, b_masked;
258 a_masked = a->as_uword[i] & mask->as_uword[i];
259 b_masked = b->as_uword[i] & mask->as_uword[i];
260
261 if (a_masked != b_masked)
Dave Barachd7cb1b52016-12-09 09:52:16 -0500262 return 0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700263 }
264 return 1;
265}
266
267always_inline void
Neale Rannsd69f4392018-08-31 06:30:16 -0400268ip6_address_mask (ip6_address_t * a, const ip6_address_t * mask)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700269{
270 int i;
271 for (i = 0; i < ARRAY_LEN (a->as_uword); i++)
272 a->as_uword[i] &= mask->as_uword[i];
273}
274
275always_inline void
276ip6_address_set_zero (ip6_address_t * a)
277{
278 int i;
279 for (i = 0; i < ARRAY_LEN (a->as_uword); i++)
280 a->as_uword[i] = 0;
281}
282
283always_inline void
284ip6_address_mask_from_width (ip6_address_t * a, u32 width)
285{
286 int i, byte, bit, bitnum;
287 ASSERT (width <= 128);
Dave Barachb7b92992018-10-17 10:38:51 -0400288 clib_memset (a, 0, sizeof (a[0]));
Ed Warnickecb9cada2015-12-08 15:45:58 -0700289 for (i = 0; i < width; i++)
290 {
291 bitnum = (7 - (i & 7));
292 byte = i / 8;
Dave Barachd7cb1b52016-12-09 09:52:16 -0500293 bit = 1 << bitnum;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700294 a->as_u8[byte] |= bit;
295 }
296}
297
298always_inline uword
Neale Rannsd69f4392018-08-31 06:30:16 -0400299ip6_address_is_zero (const ip6_address_t * a)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700300{
301 int i;
302 for (i = 0; i < ARRAY_LEN (a->as_uword); i++)
303 if (a->as_uword[i] != 0)
304 return 0;
305 return 1;
306}
307
308/* Check for unspecified address ::0 */
309always_inline uword
Neale Rannsd69f4392018-08-31 06:30:16 -0400310ip6_address_is_unspecified (const ip6_address_t * a)
Dave Barachd7cb1b52016-12-09 09:52:16 -0500311{
312 return ip6_address_is_zero (a);
313}
Ed Warnickecb9cada2015-12-08 15:45:58 -0700314
315/* Check for loopback address ::1 */
316always_inline uword
Neale Rannsd69f4392018-08-31 06:30:16 -0400317ip6_address_is_loopback (const ip6_address_t * a)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700318{
Neale Rannsd69f4392018-08-31 06:30:16 -0400319 return (a->as_u64[0] == 0 &&
320 a->as_u32[2] == 0 &&
321 a->as_u16[6] == 0 && a->as_u8[14] == 0 && a->as_u8[15] == 1);
Ed Warnickecb9cada2015-12-08 15:45:58 -0700322}
323
324/* Check for link local unicast fe80::/10. */
325always_inline uword
Neale Ranns53da2212018-02-24 02:11:19 -0800326ip6_address_is_link_local_unicast (const ip6_address_t * a)
Dave Barachd7cb1b52016-12-09 09:52:16 -0500327{
328 return a->as_u8[0] == 0xfe && (a->as_u8[1] & 0xc0) == 0x80;
329}
Ed Warnickecb9cada2015-12-08 15:45:58 -0700330
331/* Check for unique local unicast fc00::/7. */
332always_inline uword
Neale Rannsd69f4392018-08-31 06:30:16 -0400333ip6_address_is_local_unicast (const ip6_address_t * a)
Dave Barachd7cb1b52016-12-09 09:52:16 -0500334{
335 return (a->as_u8[0] & 0xfe) == 0xfc;
336}
Ed Warnickecb9cada2015-12-08 15:45:58 -0700337
Chris Lukebfd32fd2016-06-24 20:38:06 -0400338/* Check for unique global unicast 2000::/3. */
339always_inline uword
Neale Rannsd69f4392018-08-31 06:30:16 -0400340ip6_address_is_global_unicast (const ip6_address_t * a)
Dave Barachd7cb1b52016-12-09 09:52:16 -0500341{
342 return (a->as_u8[0] & 0xe0) == 0x20;
343}
Chris Lukebfd32fd2016-06-24 20:38:06 -0400344
Ed Warnickecb9cada2015-12-08 15:45:58 -0700345/* Check for solicited node multicast 0xff02::1:ff00:0/104 */
346always_inline uword
Neale Rannsd69f4392018-08-31 06:30:16 -0400347ip6_is_solicited_node_multicast_address (const ip6_address_t * a)
Ed Warnickecb9cada2015-12-08 15:45:58 -0700348{
349 return (a->as_u32[0] == clib_host_to_net_u32 (0xff020000)
350 && a->as_u32[1] == 0
351 && a->as_u32[2] == clib_host_to_net_u32 (1)
352 && a->as_u8[12] == 0xff);
353}
354
Neale Rannscd35e532018-08-31 02:51:45 -0700355always_inline u32
356ip6_address_hash_to_u32 (const ip6_address_t * a)
357{
358 return (a->as_u32[0] ^ a->as_u32[1] ^ a->as_u32[2] ^ a->as_u32[3]);
359}
360
361always_inline u64
362ip6_address_hash_to_u64 (const ip6_address_t * a)
363{
364 return (a->as_u64[0] ^ a->as_u64[1]);
365}
366
Dave Barachd7cb1b52016-12-09 09:52:16 -0500367typedef struct
368{
Ed Warnickecb9cada2015-12-08 15:45:58 -0700369 /* 4 bit version, 8 bit traffic class and 20 bit flow label. */
370 u32 ip_version_traffic_class_and_flow_label;
371
372 /* Total packet length not including this header (but including
373 any extension headers if present). */
374 u16 payload_length;
375
376 /* Protocol for next header. */
377 u8 protocol;
378
379 /* Hop limit decremented by router at each hop. */
380 u8 hop_limit;
381
382 /* Source and destination address. */
383 ip6_address_t src_address, dst_address;
384} ip6_header_t;
385
Neale Ranns038e1df2019-07-19 14:01:02 +0000386always_inline ip_dscp_t
Neale Ranns31ed7442018-02-23 05:29:09 -0800387ip6_traffic_class (const ip6_header_t * i)
Ole Troan5c749732017-03-13 13:39:52 +0100388{
389 return (i->ip_version_traffic_class_and_flow_label & 0x0FF00000) >> 20;
390}
391
Neale Ranns038e1df2019-07-19 14:01:02 +0000392static_always_inline ip_dscp_t
Neale Ranns31ed7442018-02-23 05:29:09 -0800393ip6_traffic_class_network_order (const ip6_header_t * ip6)
394{
395 return (clib_net_to_host_u32 (ip6->ip_version_traffic_class_and_flow_label)
396 & 0x0ff00000) >> 20;
397}
398
399static_always_inline void
Neale Ranns038e1df2019-07-19 14:01:02 +0000400ip6_set_traffic_class_network_order (ip6_header_t * ip6, ip_dscp_t dscp)
Neale Ranns31ed7442018-02-23 05:29:09 -0800401{
402 u32 tmp =
403 clib_net_to_host_u32 (ip6->ip_version_traffic_class_and_flow_label);
Neale Ranns039cbfe2018-02-27 03:45:38 -0800404 tmp &= 0xf00fffff;
Neale Ranns31ed7442018-02-23 05:29:09 -0800405 tmp |= (dscp << 20);
406 ip6->ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (tmp);
407}
408
Ed Warnickecb9cada2015-12-08 15:45:58 -0700409always_inline void *
410ip6_next_header (ip6_header_t * i)
Dave Barachd7cb1b52016-12-09 09:52:16 -0500411{
412 return (void *) (i + 1);
413}
Ed Warnickecb9cada2015-12-08 15:45:58 -0700414
415always_inline void
Dave Barachd7cb1b52016-12-09 09:52:16 -0500416ip6_copy_header (ip6_header_t * dst, const ip6_header_t * src)
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100417{
Dave Barachd7cb1b52016-12-09 09:52:16 -0500418 dst->ip_version_traffic_class_and_flow_label =
419 src->ip_version_traffic_class_and_flow_label;
420 dst->payload_length = src->payload_length;
421 dst->protocol = src->protocol;
422 dst->hop_limit = src->hop_limit;
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100423
Dave Barachd7cb1b52016-12-09 09:52:16 -0500424 dst->src_address.as_uword[0] = src->src_address.as_uword[0];
425 dst->src_address.as_uword[1] = src->src_address.as_uword[1];
426 dst->dst_address.as_uword[0] = src->dst_address.as_uword[0];
427 dst->dst_address.as_uword[1] = src->dst_address.as_uword[1];
Neale Ranns0bfe5d82016-08-25 15:29:12 +0100428}
429
430always_inline void
Ed Warnickecb9cada2015-12-08 15:45:58 -0700431ip6_tcp_reply_x1 (ip6_header_t * ip0, tcp_header_t * tcp0)
432{
433 {
434 ip6_address_t src0, dst0;
435
436 src0 = ip0->src_address;
437 dst0 = ip0->dst_address;
438 ip0->src_address = dst0;
439 ip0->dst_address = src0;
440 }
441
442 {
443 u16 src0, dst0;
444
Dave Barach68b0fb02017-02-28 15:15:56 -0500445 src0 = tcp0->src;
446 dst0 = tcp0->dst;
447 tcp0->src = dst0;
448 tcp0->dst = src0;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700449 }
450}
451
452always_inline void
453ip6_tcp_reply_x2 (ip6_header_t * ip0, ip6_header_t * ip1,
454 tcp_header_t * tcp0, tcp_header_t * tcp1)
455{
456 {
457 ip6_address_t src0, dst0, src1, dst1;
458
459 src0 = ip0->src_address;
460 src1 = ip1->src_address;
461 dst0 = ip0->dst_address;
462 dst1 = ip1->dst_address;
463 ip0->src_address = dst0;
464 ip1->src_address = dst1;
465 ip0->dst_address = src0;
466 ip1->dst_address = src1;
467 }
468
469 {
470 u16 src0, dst0, src1, dst1;
471
Dave Barach68b0fb02017-02-28 15:15:56 -0500472 src0 = tcp0->src;
473 src1 = tcp1->src;
474 dst0 = tcp0->dst;
475 dst1 = tcp1->dst;
476 tcp0->src = dst0;
477 tcp1->src = dst1;
478 tcp0->dst = src0;
479 tcp1->dst = src1;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700480 }
481}
482
483
Dave Barachd7cb1b52016-12-09 09:52:16 -0500484/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700485typedef CLIB_PACKED (struct {
486 u8 data;
487}) ip6_pad1_option_t;
Dave Barachd7cb1b52016-12-09 09:52:16 -0500488/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700489
Dave Barachd7cb1b52016-12-09 09:52:16 -0500490/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700491typedef CLIB_PACKED (struct {
492 u8 type;
493 u8 len;
494 u8 data[0];
495}) ip6_padN_option_t;
Dave Barachd7cb1b52016-12-09 09:52:16 -0500496/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700497
Dave Barachd7cb1b52016-12-09 09:52:16 -0500498/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700499typedef CLIB_PACKED (struct {
Dave Barachd7cb1b52016-12-09 09:52:16 -0500500#define IP6_MLDP_ALERT_TYPE 0x5
Ed Warnickecb9cada2015-12-08 15:45:58 -0700501 u8 type;
502 u8 len;
503 u16 value;
504}) ip6_router_alert_option_t;
Dave Barachd7cb1b52016-12-09 09:52:16 -0500505/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700506
Dave Barachd7cb1b52016-12-09 09:52:16 -0500507/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700508typedef CLIB_PACKED (struct {
509 u8 next_hdr;
510 /* Length of this header plus option data in 8 byte units. */
511 u8 n_data_u64s;
Shwethab78292e2016-09-13 11:51:00 +0100512}) ip6_ext_header_t;
513
Damjan Marion831d2382019-03-22 13:58:08 +0100514#define foreach_ext_hdr_type \
515 _(IP6_HOP_BY_HOP_OPTIONS) \
516 _(IPV6_ROUTE) \
517 _(IPV6_FRAGMENTATION) \
518 _(IPSEC_ESP) \
519 _(IPSEC_AH) \
520 _(IP6_DESTINATION_OPTIONS) \
521 _(MOBILITY) \
522 _(HIP) \
523 _(SHIM6)
524
Shwethab78292e2016-09-13 11:51:00 +0100525always_inline u8 ip6_ext_hdr(u8 nexthdr)
526{
Damjan Marion831d2382019-03-22 13:58:08 +0100527#ifdef CLIB_HAVE_VEC128
528 static const u8x16 ext_hdr_types = {
529#define _(x) IP_PROTOCOL_##x,
530 foreach_ext_hdr_type
531#undef _
532 };
533
534 return !u8x16_is_all_zero (ext_hdr_types == u8x16_splat (nexthdr));
535#else
Shwethab78292e2016-09-13 11:51:00 +0100536 /*
537 * find out if nexthdr is an extension header or a protocol
538 */
Damjan Marion831d2382019-03-22 13:58:08 +0100539 return 0
540#define _(x) || (nexthdr == IP_PROTOCOL_##x)
541 foreach_ext_hdr_type;
542#undef _
543#endif
Shwethab78292e2016-09-13 11:51:00 +0100544}
545
Pablo Camarillofb380952016-12-07 18:34:18 +0100546#define ip6_ext_header_len(p) ((((ip6_ext_header_t *)(p))->n_data_u64s+1) << 3)
547#define ip6_ext_authhdr_len(p) ((((ip6_ext_header_t *)(p))->n_data_u64s+2) << 2)
Shwethab78292e2016-09-13 11:51:00 +0100548
549always_inline void *
550ip6_ext_next_header (ip6_ext_header_t *ext_hdr )
551{ return (void *)((u8 *) ext_hdr + ip6_ext_header_len(ext_hdr)); }
552
Pablo Camarillofb380952016-12-07 18:34:18 +0100553/*
554 * Macro to find the IPv6 ext header of type t
555 * I is the IPv6 header
556 * P is the previous IPv6 ext header (NULL if none)
557 * M is the matched IPv6 ext header of type t
558 */
559#define ip6_ext_header_find_t(i, p, m, t) \
560if ((i)->protocol == t) \
561{ \
562 (m) = (void *)((i)+1); \
563 (p) = NULL; \
564} \
565else \
566{ \
567 (m) = NULL; \
568 (p) = (void *)((i)+1); \
569 while (ip6_ext_hdr((p)->next_hdr) && \
570 ((ip6_ext_header_t *)(p))->next_hdr != (t)) \
571 { \
572 (p) = ip6_ext_next_header((p)); \
573 } \
shwethabe146f132017-03-09 16:58:26 +0000574 if ( ((p)->next_hdr) == (t)) \
Pablo Camarillofb380952016-12-07 18:34:18 +0100575 { \
576 (m) = (void *)(ip6_ext_next_header((p))); \
577 } \
578}
579
580
Shwethab78292e2016-09-13 11:51:00 +0100581typedef CLIB_PACKED (struct {
582 u8 next_hdr;
583 /* Length of this header plus option data in 8 byte units. */
584 u8 n_data_u64s;
Ed Warnickecb9cada2015-12-08 15:45:58 -0700585 u8 data[0];
586}) ip6_hop_by_hop_ext_t;
Dave Barachd7cb1b52016-12-09 09:52:16 -0500587/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700588
Dave Barachd7cb1b52016-12-09 09:52:16 -0500589/* *INDENT-OFF* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700590typedef CLIB_PACKED (struct {
591 u8 next_hdr;
592 u8 rsv;
593 u16 fragment_offset_and_more;
594 u32 identification;
595}) ip6_frag_hdr_t;
Dave Barachd7cb1b52016-12-09 09:52:16 -0500596/* *INDENT-ON* */
Ed Warnickecb9cada2015-12-08 15:45:58 -0700597
598#define ip6_frag_hdr_offset(hdr) \
599 (clib_net_to_host_u16((hdr)->fragment_offset_and_more) >> 3)
600
Klement Sekera75e7d132017-09-20 08:26:30 +0200601#define ip6_frag_hdr_offset_bytes(hdr) \
602 (8 * ip6_frag_hdr_offset(hdr))
603
Ed Warnickecb9cada2015-12-08 15:45:58 -0700604#define ip6_frag_hdr_more(hdr) \
605 (clib_net_to_host_u16((hdr)->fragment_offset_and_more) & 0x1)
606
607#define ip6_frag_hdr_offset_and_more(offset, more) \
608 clib_host_to_net_u16(((offset) << 3) + !!(more))
609
610#endif /* included_ip6_packet_h */
Dave Barachd7cb1b52016-12-09 09:52:16 -0500611
612/*
613 * fd.io coding-style-patch-verification: ON
614 *
615 * Local Variables:
616 * eval: (c-set-style "gnu")
617 * End:
618 */