FD.io VPP  v17.01.1-3-gc6833f8
Vector Packet Processing
interface.c
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1 /*
2  * gre_interface.c: gre interfaces
3  *
4  * Copyright (c) 2016 Cisco and/or its affiliates.
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at:
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 /**
18  * @file
19  * @brief L2-GRE over IPSec tunnel interface.
20  *
21  * Creates ipsec-gre tunnel interface.
22  * Provides a command line interface so humans can interact with VPP.
23  */
24 
25 #include <vnet/vnet.h>
26 #include <vnet/pg/pg.h>
28 #include <vnet/ip/format.h>
29 #include <vnet/ipsec/ipsec.h>
30 
31 #if DPDK_CRYPTO==1
33 #define ESP_NODE "dpdk-esp-encrypt"
34 #else
35 #include <vnet/ipsec/esp.h>
36 #define ESP_NODE "esp-encrypt"
37 #endif
38 
39 u8 *
40 format_ipsec_gre_tunnel (u8 * s, va_list * args)
41 {
42  ipsec_gre_tunnel_t *t = va_arg (*args, ipsec_gre_tunnel_t *);
44 
45  s = format (s,
46  "[%d] %U (src) %U (dst) local-sa %d remote-sa %d",
47  t - gm->tunnels,
50  t->local_sa_id, t->remote_sa_id);
51  return s;
52 }
53 
54 static clib_error_t *
56  unformat_input_t * input,
57  vlib_cli_command_t * cmd)
58 {
61 
62  if (pool_elts (igm->tunnels) == 0)
63  vlib_cli_output (vm, "No IPSec GRE tunnels configured...");
64 
65  /* *INDENT-OFF* */
66  pool_foreach (t, igm->tunnels,
67  ({
68  vlib_cli_output (vm, "%U", format_ipsec_gre_tunnel, t);
69  }));
70  /* *INDENT-ON* */
71 
72  return 0;
73 }
74 
75 /* *INDENT-OFF* */
76 VLIB_CLI_COMMAND (show_ipsec_gre_tunnel_command, static) = {
77  .path = "show ipsec gre tunnel",
79 };
80 /* *INDENT-ON* */
81 
82 /* force inclusion from application's main.c */
85 {
86  return 0;
87 }
88 
90 
91 /**
92  * @brief Add or delete ipsec-gre tunnel interface.
93  *
94  * @param *a vnet_ipsec_gre_add_del_tunnel_args_t - tunnel interface parameters
95  * @param *sw_if_indexp u32 - software interface index
96  * @return int - 0 if success otherwise <code>VNET_API_ERROR_</code>
97  */
98 int
100  u32 * sw_if_indexp)
101 {
103  vnet_main_t *vnm = igm->vnet_main;
104  ip4_main_t *im = &ip4_main;
107  u32 hw_if_index, sw_if_index;
108  u32 slot;
109  uword *p;
110  u64 key;
112 
113  memset (&args, 0, sizeof (args));
114  args.is_add = a->is_add;
115  args.local_sa_id = a->lsa;
116  args.remote_sa_id = a->rsa;
117  args.local_ip.as_u32 = a->src.as_u32;
118  args.remote_ip.as_u32 = a->dst.as_u32;
119 
120  key = (u64) a->src.as_u32 << 32 | (u64) a->dst.as_u32;
121  p = hash_get (igm->tunnel_by_key, key);
122 
123  if (a->is_add)
124  {
125  /* check if same src/dst pair exists */
126  if (p)
127  return VNET_API_ERROR_INVALID_VALUE;
128 
130  memset (t, 0, sizeof (*t));
131 
133  {
135 
136  hw_if_index = igm->free_ipsec_gre_tunnel_hw_if_indices
138  _vec_len (igm->free_ipsec_gre_tunnel_hw_if_indices) -= 1;
139 
140  hi = vnet_get_hw_interface (vnm, hw_if_index);
141  hi->dev_instance = t - igm->tunnels;
142  hi->hw_instance = hi->dev_instance;
143 
144  /* clear old stats of freed tunnel before reuse */
145  sw_if_index = hi->sw_if_index;
149  sw_if_index);
152  sw_if_index);
154  (&im->sw_if_counters[VNET_INTERFACE_COUNTER_DROP], sw_if_index);
156  }
157  else
158  {
159  hw_if_index = vnet_register_interface
160  (vnm, ipsec_gre_device_class.index, t - igm->tunnels,
161  ipsec_gre_hw_interface_class.index, t - igm->tunnels);
162  hi = vnet_get_hw_interface (vnm, hw_if_index);
163  sw_if_index = hi->sw_if_index;
164  }
165 
166  t->hw_if_index = hw_if_index;
167  t->sw_if_index = sw_if_index;
168  t->local_sa_id = a->lsa;
169  t->remote_sa_id = a->rsa;
172 
173  ip4_sw_interface_enable_disable (sw_if_index, 1);
174 
176  sw_if_index, ~0);
177  igm->tunnel_index_by_sw_if_index[sw_if_index] = t - igm->tunnels;
178 
179  vec_validate (im->fib_index_by_sw_if_index, sw_if_index);
180 
181  hi->min_packet_bytes = 64 + sizeof (gre_header_t) +
182  sizeof (ip4_header_t) + sizeof (esp_header_t) + sizeof (esp_footer_t);
184  /* preamble */ 8 + /* inter frame gap */ 12;
185 
186  /* Standard default gre MTU. */
188  9000;
189 
190  clib_memcpy (&t->tunnel_src, &a->src, sizeof (t->tunnel_src));
191  clib_memcpy (&t->tunnel_dst, &a->dst, sizeof (t->tunnel_dst));
192 
193  hash_set (igm->tunnel_by_key, key, t - igm->tunnels);
194 
196  (vnm->vlib_main, hi->tx_node_index, ESP_NODE,
198 
200 
201  }
202  else
203  { /* !is_add => delete */
204  /* tunnel needs to exist */
205  if (!p)
206  return VNET_API_ERROR_NO_SUCH_ENTRY;
207 
208  t = pool_elt_at_index (igm->tunnels, p[0]);
209 
210  sw_if_index = t->sw_if_index;
211  ip4_sw_interface_enable_disable (sw_if_index, 0);
212  vnet_sw_interface_set_flags (vnm, sw_if_index, 0 /* down */ );
213  /* make sure tunnel is removed from l2 bd or xconnect */
214  set_int_l2_mode (igm->vlib_main, vnm, MODE_L3, sw_if_index, 0, 0, 0, 0);
216  igm->tunnel_index_by_sw_if_index[sw_if_index] = ~0;
217 
218  hash_unset (igm->tunnel_by_key, key);
219  pool_put (igm->tunnels, t);
220  }
221 
222  if (sw_if_indexp)
223  *sw_if_indexp = sw_if_index;
224 
225  return ipsec_add_del_ipsec_gre_tunnel (vnm, &args);
226 }
227 
228 static clib_error_t *
230  unformat_input_t * input,
231  vlib_cli_command_t * cmd)
232 {
233  unformat_input_t _line_input, *line_input = &_line_input;
234  u8 is_add = 1;
235  u32 num_m_args = 0;
236  ip4_address_t src, dst;
237  u32 lsa = 0, rsa = 0;
239  int rv;
240  u32 sw_if_index;
241 
242  /* Get a line of input. */
243  if (!unformat_user (input, unformat_line_input, line_input))
244  return 0;
245 
246  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
247  {
248  if (unformat (line_input, "del"))
249  is_add = 0;
250  else if (unformat (line_input, "src %U", unformat_ip4_address, &src))
251  num_m_args++;
252  else if (unformat (line_input, "dst %U", unformat_ip4_address, &dst))
253  num_m_args++;
254  else if (unformat (line_input, "local-sa %d", &lsa))
255  num_m_args++;
256  else if (unformat (line_input, "remote-sa %d", &rsa))
257  num_m_args++;
258  else
259  return clib_error_return (0, "unknown input `%U'",
260  format_unformat_error, input);
261  }
262  unformat_free (line_input);
263 
264  if (num_m_args < 4)
265  return clib_error_return (0, "mandatory argument(s) missing");
266 
267  if (memcmp (&src, &dst, sizeof (src)) == 0)
268  return clib_error_return (0, "src and dst are identical");
269 
270  memset (a, 0, sizeof (*a));
271  a->is_add = is_add;
272  a->lsa = lsa;
273  a->rsa = rsa;
274  clib_memcpy (&a->src, &src, sizeof (src));
275  clib_memcpy (&a->dst, &dst, sizeof (dst));
276 
277  rv = vnet_ipsec_gre_add_del_tunnel (a, &sw_if_index);
278 
279  switch (rv)
280  {
281  case 0:
283  vnet_get_main (), sw_if_index);
284  break;
285  case VNET_API_ERROR_INVALID_VALUE:
286  return clib_error_return (0, "GRE tunnel already exists...");
287  default:
288  return clib_error_return (0,
289  "vnet_ipsec_gre_add_del_tunnel returned %d",
290  rv);
291  }
292 
293  return 0;
294 }
295 
296 /* *INDENT-OFF* */
297 VLIB_CLI_COMMAND (create_ipsec_gre_tunnel_command, static) = {
298  .path = "create ipsec gre tunnel",
299  .short_help = "create ipsec gre tunnel src <addr> dst <addr> "
300  "local-sa <id> remote-sa <id> [del]",
302 };
303 /* *INDENT-ON* */
304 
305 /*
306 * fd.io coding-style-patch-verification: ON
307 *
308 * Local Variables:
309 * eval: (c-set-style "gnu")
310 * End:
311 */
#define vec_validate(V, I)
Make sure vector is long enough for given index (no header, unspecified alignment) ...
Definition: vec.h:396
vmrglw vmrglh hi
#define hash_set(h, key, value)
Definition: hash.h:254
ip4_address_t tunnel_dst
tunnel IPv4 dst address
Definition: ipsec_gre.h:53
uword unformat(unformat_input_t *i, char *fmt,...)
Definition: unformat.c:966
#define hash_unset(h, key)
Definition: hash.h:260
a
Definition: bitmap.h:516
u32 remote_sa
remote IPSec SA index
Definition: ipsec_gre.h:55
L2-GRE over IPSec packet processing.
vnet_interface_main_t interface_main
Definition: vnet.h:57
#define UNFORMAT_END_OF_INPUT
Definition: format.h:143
static vnet_hw_interface_t * vnet_get_hw_interface(vnet_main_t *vnm, u32 hw_if_index)
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:482
static clib_error_t * show_ipsec_gre_tunnel_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: interface.c:55
u32 * fib_index_by_sw_if_index
Table index indexed by software interface.
Definition: ip4.h:105
u8 * format_ipsec_gre_tunnel(u8 *s, va_list *args)
Definition: interface.c:40
format_function_t format_ip4_address
Definition: format.h:79
int ipsec_add_del_ipsec_gre_tunnel(vnet_main_t *vnm, ipsec_add_del_ipsec_gre_tunnel_args_t *args)
Definition: ipsec_if.c:233
format_function_t format_vnet_sw_if_index_name
#define IPSEC_GRE_OUTPUT_NEXT_ESP_ENCRYPT
Definition: ipsec_gre.h:87
ipsec_gre_tunnel_t * tunnels
pool of tunnel instances
Definition: ipsec_gre.h:68
vnet_main_t * vnet_get_main(void)
Definition: misc.c:46
#define pool_foreach(VAR, POOL, BODY)
Iterate through pool.
Definition: pool.h:348
#define VLIB_INIT_FUNCTION(x)
Definition: init.h:111
vlib_combined_counter_main_t * combined_sw_if_counters
Definition: interface.h:615
ipsec_gre_main_t ipsec_gre_main
Definition: ipsec_gre.c:25
u32 ipsec_get_sa_index_by_sa_id(u32 sa_id)
Definition: ipsec.c:44
vnet_hw_interface_class_t ipsec_gre_hw_interface_class
static void unformat_free(unformat_input_t *i)
Definition: format.h:161
unsigned long u64
Definition: types.h:89
uword unformat_user(unformat_input_t *input, unformat_function_t *func,...)
Definition: unformat.c:977
u32 vnet_register_interface(vnet_main_t *vnm, u32 dev_class_index, u32 dev_instance, u32 hw_class_index, u32 hw_instance)
Definition: interface.c:688
u32 set_int_l2_mode(vlib_main_t *vm, vnet_main_t *vnet_main, u32 mode, u32 sw_if_index, u32 bd_index, u32 bvi, u32 shg, u32 xc_sw_if_index)
Set the subinterface to run in l2 or l3 mode.
Definition: l2_input.c:509
u32 sw_if_index
hardware interface index
Definition: ipsec_gre.h:58
u32 remote_sa_id
remote IPSec SA id
Definition: ipsec_gre.h:57
IPSec-GRE tunnel add/del arguments.
Definition: ipsec_gre.h:93
unformat_function_t unformat_ip4_address
Definition: format.h:76
u32 lsa
local IPSec SA id
Definition: ipsec_gre.h:99
uword * tunnel_by_key
hash mapping src/dst addr pair to tunnel
Definition: ipsec_gre.h:70
#define hash_get(h, key)
Definition: hash.h:248
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:369
static void vlib_zero_combined_counter(vlib_combined_counter_main_t *cm, u32 index)
Clear a combined counter Clears the set of per-thread u16 counters, and the shared vlib_counter_t...
Definition: counter.h:321
clib_error_t * ipsec_gre_interface_init(vlib_main_t *vm)
Definition: interface.c:84
void ip4_sw_interface_enable_disable(u32 sw_if_index, u32 is_enable)
Definition: ip4_forward.c:807
vlib_main_t * vlib_main
Definition: vnet.h:79
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:214
u32 local_sa
local IPSec SA index
Definition: ipsec_gre.h:54
vlib_simple_counter_main_t * sw_if_counters
Definition: interface.h:614
void vlib_cli_output(vlib_main_t *vm, char *fmt,...)
Definition: cli.c:576
#define pool_get_aligned(P, E, A)
Allocate an object E from a pool P (general version).
Definition: pool.h:169
u8 is_add
1 - add, 0 - delete
Definition: ipsec_gre.h:95
u32 * tunnel_index_by_sw_if_index
mapping from sw_if_index to tunnel index
Definition: ipsec_gre.h:74
#define clib_memcpy(a, b, c)
Definition: string.h:69
static void vnet_interface_counter_unlock(vnet_interface_main_t *im)
Definition: interface.h:640
IPSec-GRE state.
Definition: ipsec_gre.h:66
u32 rsa
remote IPSec SA id
Definition: ipsec_gre.h:100
int vnet_ipsec_gre_add_del_tunnel(vnet_ipsec_gre_add_del_tunnel_args_t *a, u32 *sw_if_indexp)
Add or delete ipsec-gre tunnel interface.
Definition: interface.c:99
#define VLIB_CLI_COMMAND(x,...)
Definition: cli.h:154
static void vnet_interface_counter_lock(vnet_interface_main_t *im)
Definition: interface.h:632
ip4_address_t src
tunnel IPv4 src address
Definition: ipsec_gre.h:97
u32 max_l3_packet_bytes[VLIB_N_RX_TX]
Definition: interface.h:449
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
vnet_device_class_t ipsec_gre_device_class
IPSec-GRE tunnel parameters.
Definition: ipsec_gre.h:50
IPv4 main type.
Definition: ip4.h:95
static void vlib_zero_simple_counter(vlib_simple_counter_main_t *cm, u32 index)
Clear a simple counter Clears the set of per-thread u16 counters, and the u64 counter.
Definition: counter.h:143
vnet_main_t * vnet_main
convenience
Definition: ipsec_gre.h:78
u64 uword
Definition: types.h:112
Definition: defs.h:47
u32 local_sa_id
local IPSec SA id
Definition: ipsec_gre.h:56
ip4_address_t dst
tunnel IPv4 dst address
Definition: ipsec_gre.h:98
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
unsigned char u8
Definition: types.h:56
#define ESP_NODE
Definition: interface.c:36
u32 * free_ipsec_gre_tunnel_hw_if_indices
free vlib hw_if_indices
Definition: ipsec_gre.h:72
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:169
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:418
ip4_main_t ip4_main
Global ip4 main structure.
Definition: ip4_forward.c:1099
clib_error_t * vnet_sw_interface_set_flags(vnet_main_t *vnm, u32 sw_if_index, u32 flags)
Definition: interface.c:539
static clib_error_t * create_ipsec_gre_tunnel_command_fn(vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd)
Definition: interface.c:229
u32 per_packet_overhead_bytes
Definition: interface.h:446
#define clib_error_return(e, args...)
Definition: error.h:111
struct _unformat_input_t unformat_input_t
uword vlib_node_add_named_next_with_slot(vlib_main_t *vm, uword node, char *name, uword slot)
Definition: node.c:213
#define vec_validate_init_empty(V, I, INIT)
Make sure vector is long enough for given index and initialize empty space (no header, unspecified alignment)
Definition: vec.h:445
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:67
unformat_function_t unformat_line_input
Definition: format.h:281
vlib_main_t * vlib_main
convenience
Definition: ipsec_gre.h:77
Definition: defs.h:46
ip4_address_t tunnel_src
tunnel IPv4 src address
Definition: ipsec_gre.h:52
#define MODE_L3
Definition: l2_input.h:178
static uword pool_elts(void *v)
Number of active elements in a pool.
Definition: pool.h:109