summaryrefslogtreecommitdiffstats
path: root/src/vnet/ipsec/ipsec_spd.c
blob: 22dddfd3fa8f150cd37f235f95fd80f491f1605b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
/*
 * Copyright (c) 2015 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <vnet/ipsec/ipsec.h>
#include <vnet/ipsec/ipsec_io.h>

int
ipsec_add_del_spd (vlib_main_t * vm, u32 spd_id, int is_add)
{
  ipsec_main_t *im = &ipsec_main;
  ipsec_spd_t *spd = 0;
  uword *p;
  u32 spd_index, k, v;

  p = hash_get (im->spd_index_by_spd_id, spd_id);
  if (p && is_add)
    return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
  if (!p && !is_add)
    return VNET_API_ERROR_NO_SUCH_ENTRY;

  if (!is_add)			/* delete */
    {
      spd_index = p[0];
      spd = pool_elt_at_index (im->spds, spd_index);
      if (!spd)
	return VNET_API_ERROR_INVALID_VALUE;
      /* *INDENT-OFF* */
      hash_foreach (k, v, im->spd_index_by_sw_if_index, ({
        if (v == spd_index)
          ipsec_set_interface_spd(vm, k, spd_id, 0);
      }));
      /* *INDENT-ON* */
      hash_unset (im->spd_index_by_spd_id, spd_id);
#define _(s,v) vec_free(spd->policies[IPSEC_SPD_POLICY_##s]);
      foreach_ipsec_spd_policy_type
#undef _
	if (im->ipv4_fp_spd_is_enabled)
      {
	ipsec_spd_fp_t *fp_spd = &spd->fp_spd;

	clib_bihash_free_16_8 (&fp_spd->fp_ip4_lookup_hash);
      }

      if (im->ipv6_fp_spd_is_enabled)
	{
	  ipsec_spd_fp_t *fp_spd = &spd->fp_spd;

	  clib_bihash_free_40_8 (&fp_spd->fp_ip6_lookup_hash);
	}

      pool_put (im->spds, spd);
    }
  else /* create new SPD */
    {
      pool_get (im->spds, spd);
      clib_memset (spd, 0, sizeof (*spd));
      spd_index = spd - im->spds;
      spd->id = spd_id;
      hash_set (im->spd_index_by_spd_id, spd_id, spd_index);
      if (im->ipv4_fp_spd_is_enabled)
	{
	  ipsec_spd_fp_t *fp_spd = &spd->fp_spd;

	  clib_bihash_init_16_8 (
	    &fp_spd->fp_ip4_lookup_hash, "SPD_FP ip4 rules lookup bihash",
	    im->fp_lookup_hash_buckets,
	    im->fp_lookup_hash_buckets * IPSEC_FP_IP4_HASH_MEM_PER_BUCKET);
	}
      if (im->ipv6_fp_spd_is_enabled)
	{
	  ipsec_spd_fp_t *fp_spd = &spd->fp_spd;

	  clib_bihash_init_40_8 (
	    &fp_spd->fp_ip6_lookup_hash, "SPD_FP ip6 rules lookup bihash",
	    im->fp_lookup_hash_buckets,
	    im->fp_lookup_hash_buckets * IPSEC_FP_IP6_HASH_MEM_PER_BUCKET);
	  fp_spd->fp_ip6_lookup_hash_initialized = 1;
	}
    }
  return 0;
}

int
ipsec_set_interface_spd (vlib_main_t * vm, u32 sw_if_index, u32 spd_id,
			 int is_add)
{
  ipsec_main_t *im = &ipsec_main;
  ip4_ipsec_config_t config;

  u32 spd_index;
  uword *p;

  p = hash_get (im->spd_index_by_spd_id, spd_id);
  if (!p)
    return VNET_API_ERROR_SYSCALL_ERROR_1;	/* no such spd-id */

  spd_index = p[0];

  p = hash_get (im->spd_index_by_sw_if_index, sw_if_index);
  if (p && is_add)
    return VNET_API_ERROR_SYSCALL_ERROR_2;	/* spd already assigned */

  if (is_add)
    {
      hash_set (im->spd_index_by_sw_if_index, sw_if_index, spd_index);
    }
  else
    {
      hash_unset (im->spd_index_by_sw_if_index, sw_if_index);
    }

  /* enable IPsec on TX */
  vnet_feature_enable_disable ("ip4-output", "ipsec4-output-feature",
			       sw_if_index, is_add, 0, 0);
  vnet_feature_enable_disable ("ip6-output", "ipsec6-output-feature",
			       sw_if_index, is_add, 0, 0);

  config.spd_index = spd_index;

  /* enable IPsec on RX */
  vnet_feature_enable_disable ("ip4-unicast", "ipsec4-input-feature",
			       sw_if_index, is_add, &config, sizeof (config));
  vnet_feature_enable_disable ("ip6-unicast", "ipsec6-input-feature",
			       sw_if_index, is_add, &config, sizeof (config));

  return 0;
}

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */