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</*
* Copyright (c) 2011-2016 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.
*/
#ifndef __included_bfd_protocol_h__
#define __included_bfd_protocol_h__
/**
* @file
* @brief BFD protocol declarations
*/
#include <vppinfra/types.h>
#include <vppinfra/clib.h>
/* auth type value, max key length, name, description */
#define foreach_bfd_auth_type(F) \
F (0, 0, reserved, "Reserved") \
F (1, 16, simple_password, "Simple Password") \
F (2, 16, keyed_md5, "Keyed MD5") \
F (3, 16, meticulous_keyed_md5, "Meticulous Keyed MD5") \
F (4, 20, keyed_sha1, "Keyed SHA1") \
F (5, 20, meticulous_keyed_sha1, "Meticulous Keyed SHA1")
#define BFD_AUTH_TYPE_NAME(t) BFD_AUTH_TYPE_##t
typedef enum
{
#define F(n, l, t, s) BFD_AUTH_TYPE_NAME (t) = n,
foreach_bfd_auth_type (F)
#undef F
} bfd_auth_type_e;
/**
* @brief get the maximum length of key data for given auth type
*/
u32 bfd_max_key_len_for_auth_type (bfd_auth_type_e auth_type);
const char *bfd_auth_type_str (bfd_auth_type_e auth_type);
/* *INDENT-OFF* */
typedef CLIB_PACKED (struct {
u8 type;
u8 len;
}) bfd_auth_common_t;
/* *INDENT-ON* */
/* *INDENT-OFF* */
typedef CLIB_PACKED (</*
* decap.c : IPSec tunnel support
*
* 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/vnet.h>
#include <vnet/api_errno.h>
#include <vnet/ip/ip.h>
#include <vnet/interface.h>
#include <vnet/ipsec/ipsec.h>
#include <vnet/ipsec/ikev2.h>
#include <vnet/ipsec/esp.h>
u32
ipsec_get_sa_index_by_sa_id (u32 sa_id)
{
ipsec_main_t *im = &ipsec_main;
uword *p = hash_get (im->sa_index_by_sa_id, sa_id);
if (!p)
return ~0;
return p[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_1; /* 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);
}
clib_warning ("sw_if_index %u spd_id %u spd_index %u",
sw_if_index, spd_id, spd_index);
/* enable IPsec on TX */
vnet_feature_enable_disable ("ip4-output", "ipsec-output-ip4", sw_if_index,
is_add, 0, 0);
vnet_feature_enable_disable ("ip6-output", "ipsec-output-ip6", sw_if_index,
is_add, 0, 0);
/* enable IPsec on RX */
vnet_feature_enable_disable ("ip4-unicast", "ipsec-input-ip4", sw_if_index,
is_add, &config, sizeof (config));
vnet_feature_enable_disable ("ip6-unicast", "ipsec-input-ip6", sw_if_index,
is_add, &config, sizeof (config));
return 0;
}
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_INVALID_VALUE;
if (!p && !is_add)
return VNET_API_ERROR_INVALID_VALUE;
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);
pool_free (spd->policies);
vec_free (spd->ipv4_outbound_policies);
vec_free (spd->ipv6_outbound_policies);
vec_free (spd->ipv4_inbound_protect_policy_indices);
vec_free (spd->ipv4_inbound_policy_discard_and_bypass_indices);
pool_put (im->spds, spd);
}
else /* create new SPD */
{
pool_get (im->spds, spd);
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);
}
return 0;
}
static int
ipsec_spd_entry_sort (void *a1, void *a2)
{
ipsec_main_t *im = &ipsec_main;
u32 *id1 = a1;
u32 *id2 = a2;
ipsec_spd_t *spd;
ipsec_policy_t *p1, *p2;
/* *INDENT-OFF* */
pool_foreach (spd, im->spds, ({
p1 = pool_elt_at_index(spd->policies, *id1);
p2 = pool_elt_at_index(spd->policies, *id2);
if (p1 && p2)
return p2->priority - p1->priority;
}));
/* *INDENT-ON* */
return 0;
}
int
ipsec_add_del_policy (vlib_main_t * vm, ipsec_policy_t * policy, int is_add)
{
ipsec_main_t *im = &ipsec_main;
ipsec_spd_t *spd = 0;
ipsec_policy_t *vp;
uword *p;
u32 spd_index;
clib_warning ("policy-id %u priority %d is_outbound %u", policy->id,
policy->priority, policy->is_outbound);
if (policy->policy == IPSEC_POLICY_ACTION_PROTECT)
{
p = hash_get (im->sa_index_by_sa_id, policy->sa_id);
if (!p)
return VNET_API_ERROR_SYSCALL_ERROR_1;
policy->sa_index = p[0];
}
p = hash_get (im->spd_index_by_spd_id, policy->id);
if (!p)
return VNET_API_ERROR_SYSCALL_ERROR_1;
spd_index = p[0];
spd = pool_elt_at_index (im->spds, spd_index);
if (!spd)
return VNET_API_ERROR_SYSCALL_ERROR_1;
if (is_add)
{
u32 policy_index;
pool_get (spd->policies, vp);
clib_memcpy (vp, policy, sizeof (*vp));
policy_index = vp - spd->policies;
if (policy->is_outbound)
{
if (policy->is_ipv6)
{
vec_add1 (spd->ipv6_outbound_policies, policy_index);
clib_memcpy (vp, policy, sizeof (ipsec_policy_t));
vec_sort_with_function (spd->ipv6_outbound_policies,
ipsec_spd_entry_sort);
}
else
{
vec_add1 (spd->ipv4_outbound_policies, policy_index);
clib_memcpy (vp, policy, sizeof (ipsec_policy_t));
vec_sort_with_function (spd->ipv4_outbound_policies,
ipsec_spd_entry_sort);
}
}
else
{
if (policy->is_ipv6)
{
if (policy->policy == IPSEC_POLICY_ACTION_PROTECT)
{
vec_add1 (spd->ipv6_inbound_protect_policy_indices,
policy_index);
clib_memcpy (vp, policy, sizeof (ipsec_policy_t));
vec_sort_with_function
(spd->ipv6_inbound_protect_policy_indices,
ipsec_spd_entry_sort);
}
else
{
vec_add1
(spd->ipv6_inbound_policy_discard_and_bypass_indices,
policy_index);
clib_memcpy (vp, policy, sizeof (ipsec_policy_t));
vec_sort_with_function
(spd->ipv6_inbound_policy_discard_and_bypass_indices,
ipsec_spd_entry_sort);
}
}
else
{
if (policy->policy == IPSEC_POLICY_ACTION_PROTECT)
{
vec_add1 (spd->ipv4_inbound_protect_policy_indices,
policy_index);
clib_memcpy (vp, policy, sizeof (ipsec_policy_t));
vec_sort_with_function
(spd->ipv4_inbound_protect_policy_indices,
ipsec_spd_entry_sort);
}
else
{
vec_add1
(spd->ipv4_inbound_policy_discard_and_bypass_indices,
policy_index);
clib_memcpy (vp, policy, sizeof (ipsec_policy_t));
vec_sort_with_function
(spd->ipv4_inbound_policy_discard_and_bypass_indices,
ipsec_spd_entry_sort);
}
}
}
}
else
{
u32 i, j;
/* *INDENT-OFF* */
pool_foreach_index(i, spd->policies, ({
vp = pool_elt_at_index(spd->policies, i);
if (vp->priority != policy->priority)
continue;
if (vp->is_outbound != policy->is_outbound)
continue;
if (vp->policy != policy->policy)
continue;
if (vp->sa_id != policy->sa_id)
continue;
if (vp->protocol != policy->protocol)
continue;
if (vp->lport.start != policy->lport.start)
continue;
if (vp->lport.stop != policy->lport.stop)
continue;
if (vp->rport.start != policy->rport.start)
continue;
if (vp->rport.stop != policy->rport.stop)
continue;
if (vp->is_ipv6 != policy->is_ipv6)
continue;
if (policy->is_ipv6)
{
if (vp->laddr.start.ip6.as_u64[0] != policy->laddr.start.ip6.as_u64[0])
continue;
if (vp->laddr.start.ip6.as_u64[1] != policy->laddr.start.ip6.as_u64[1])
continue;
if (vp->laddr.stop.ip6.as_u64[0] != policy->laddr.stop.ip6.as_u64[0])
continue;
if (vp->laddr.stop.ip6.as_u64[1] != policy->laddr.stop.ip6.as_u64[1])
continue;
if (vp->raddr.start.ip6.as_u64[0] != policy->raddr.start.ip6.as_u64[0])
continue;
if (vp->raddr.start.ip6.as_u64[1] != policy->raddr.start.ip6.as_u64[1])
continue;
if (vp->raddr.stop.ip6.as_u64[0] != policy->raddr.stop.ip6.as_u64[0])
continue;
if (vp->laddr.stop.ip6.as_u64[1] != policy->laddr.stop.ip6.as_u64[1])
continue;
if (policy->is_outbound)
{
vec_foreach_index(j, spd->ipv6_outbound_policies) {
if (vec_elt(spd->ipv6_outbound_policies, j) == i) {
vec_del1 (spd->ipv6_outbound_policies, j);
break;
}
}
}
else
{
if (policy->policy == IPSEC_POLICY_ACTION_PROTECT)
{
vec_foreach_index(j, spd->ipv6_inbound_protect_policy_indices) {
if (vec_elt(spd->ipv6_inbound_protect_policy_indices, j) == i) {
vec_del1 (spd->ipv6_inbound_protect_policy_indices, j);
break;
}
}
}
else
{
vec_foreach_index(j, spd->ipv6_inbound_policy_discard_and_bypass_indices) {
if (vec_elt(spd->ipv6_inbound_policy_discard_and_bypass_indices, j) == i) {
vec_del1 (spd->ipv6_inbound_policy_discard_and_bypass_indices, j);
break;
}
}
}
}
}
else
{
if (vp->laddr.start.ip4.as_u32 != policy->laddr.start.ip4.as_u32)
continue;
if (vp->laddr.stop.ip4.as_u32 != policy->laddr.stop.ip4.as_u32)
continue;
if (vp->raddr.start.ip4.as_u32 != policy->raddr.start.ip4.as_u32)
continue;
if (vp->raddr.stop.ip4.as_u32 != policy->raddr.stop.ip4.as_u32)
continue;
if (policy->is_outbound)
{
vec_foreach_index(j, spd->ipv4_outbound_policies) {
if (vec_elt(spd->ipv4_outbound_policies, j) == i) {
vec_del1 (spd->ipv4_outbound_policies, j);
break;
}
}
}
else
{
if (policy->policy == IPSEC_POLICY_ACTION_PROTECT)
{
vec_foreach_index(j, spd->ipv4_inbound_protect_policy_indices) {
if (vec_elt(spd->ipv4_inbound_protect_policy_indices, j) == i) {
vec_del1 (spd->ipv4_inbound_protect_policy_indices, j);
break;
}
}
}
else
{
vec_foreach_index(j, spd->ipv4_inbound_policy_discard_and_bypass_indices) {
if (vec_elt(spd->ipv4_inbound_policy_discard_and_bypass_indices, j) == i) {
vec_del1 (spd->ipv4_inbound_policy_discard_and_bypass_indices, j);
break;
}
}
}
}
pool_put (spd->policies, vp);
break;
}
}));
/* *INDENT-ON* */
}
return 0;
}
static u8
ipsec_is_sa_used (u32 sa_index)
{
ipsec_main_t *im = &ipsec_main;
ipsec_spd_t *spd;
ipsec_policy_t *p;
ipsec_tunnel_if_t *t;
/* *INDENT-OFF* */
pool_foreach(spd, im->spds, ({
pool_foreach(p, spd->policies, ({
if (p->policy == IPSEC_POLICY_ACTION_PROTECT)
{
if (p->sa_index == sa_index)
return 1;
}
}));
}));
pool_foreach(t, im->tunnel_interfaces, ({
if (t->input_sa_index == sa_index)
return 1;
if (t->output_sa_index == sa_index)
return 1;
}));
/* *INDENT-ON* */
return 0;
}
int
ipsec_add_del_sa (vlib_main_t * vm, ipsec_sa_t * new_sa, int is_add)
{
ipsec_main_t *im = &ipsec_main;
ipsec_sa_t *sa = 0;
uword *p;
u32 sa_index;
clib_warning ("id %u spi %u", new_sa->id, new_sa->spi);
p = hash_get (im->sa_index_by_sa_id, new_sa->id);
if (p && is_add)
return VNET_API_ERROR_SYSCALL_ERROR_1; /* already exists */
if (!p && !is_add)
return VNET_API_ERROR_SYSCALL_ERROR_1;
if (!is_add) /* delete */
{
sa_index = p[0];
sa = pool_elt_at_index (im->sad, sa_index);
if (ipsec_is_sa_used (sa_index))
{
clib_warning ("sa_id %u used in policy", sa->id);
return VNET_API_ERROR_SYSCALL_ERROR_1; /* sa used in policy */
}
hash_unset (im->sa_index_by_sa_id, sa->id);
if (im->cb.add_del_sa_sess_cb &&
im->cb.add_del_sa_sess_cb (sa_index, is_add) < 0)
return VNET_API_ERROR_SYSCALL_ERROR_1;
pool_put (im->sad, sa);
}
else /* create new SA */
{
pool_get (im->sad, sa);
clib_memcpy (sa, new_sa, sizeof (*sa));
sa_index = sa - im->sad;
hash_set (im->sa_index_by_sa_id, sa->id, sa_index);
if (im->cb.add_del_sa_sess_cb &&
im->cb.add_del_sa_sess_cb (sa_index, is_add) < 0)
return VNET_API_ERROR_SYSCALL_ERROR_1;
}
return 0;
}
int
ipsec_set_sa_key (vlib_main_t * vm, ipsec_sa_t * sa_update)
{
ipsec_main_t *im = &ipsec_main;
uword *p;
u32 sa_index;
ipsec_sa_t *sa = 0;
p = hash_get (im->sa_index_by_sa_id, sa_update->id);
if (!p)
return VNET_API_ERROR_SYSCALL_ERROR_1; /* no such sa-id */
sa_index = p[0];
sa = pool_elt_at_index (im->sad, sa_index);
/* new crypto key */
if (0 < sa_update->crypto_key_len)
{
clib_memcpy (sa->crypto_key, sa_update->crypto_key,
sa_update->crypto_key_len);
sa->crypto_key_len = sa_update->crypto_key_len;
}
/* new integ key */
if (0 < sa_update->integ_key_len)
{
clib_memcpy (sa->integ_key, sa_update->integ_key,
sa_update->integ_key_len);
sa->integ_key_len = sa_update->integ_key_len;
}
if (sa->crypto_key_len + sa->integ_key_len > 0)
{
if (im->cb.add_del_sa_sess_cb &&
im->cb.add_del_sa_sess_cb (sa_index, 0) < 0)
return VNET_API_ERROR_SYSCALL_ERROR_1;
}
return 0;
}
static void
ipsec_rand_seed (void)
{
struct
{
time_t time;
pid_t pid;
void *p;
} seed_data;
seed_data.time = time (NULL);
seed_data.pid = getpid ();
seed_data.p = (void *) &seed_data;
RAND_seed ((const void *) &seed_data, sizeof (seed_data));
}
static clib_error_t *
ipsec_check_support (ipsec_sa_t * sa)
{
if (sa->crypto_alg == IPSEC_CRYPTO_ALG_AES_GCM_128)
return clib_error_return (0, "unsupported aes-gcm-128 crypto-alg");
if (sa->integ_alg == IPSEC_INTEG_ALG_NONE)
return clib_error_return (0, "unsupported none integ-alg");
if (sa->integ_alg == IPSEC_INTEG_ALG_AES_GCM_128)
return clib_error_return (0, "unsupported aes-gcm-128 integ-alg");
return 0;
}
static clib_error_t *
ipsec_init (vlib_main_t * vm)
{
clib_error_t *error;
ipsec_main_t *im = &ipsec_main;
vlib_thread_main_t *tm = vlib_get_thread_main ();
vlib_node_t *node;
ipsec_rand_seed ();
memset (im, 0, sizeof (im[0]));
im->vnet_main = vnet_get_main ();
im->vlib_main = vm;
im->spd_index_by_spd_id = hash_create (0, sizeof (uword));
im->sa_index_by_sa_id = hash_create (0, sizeof (uword));
im->spd_index_by_sw_if_index = hash_create (0, sizeof (uword));
vec_validate_aligned (im->empty_buffers, tm->n_vlib_mains - 1,
CLIB_CACHE_LINE_BYTES);
node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
ASSERT (node);
im->error_drop_node_index = node->index;
node = vlib_get_node_by_name (vm, (u8 *) "esp-encrypt");
ASSERT (node);
im->esp_encrypt_node_index = node->index;
node = vlib_get_node_by_name (vm, (u8 *) "esp-decrypt");
ASSERT (node);
im->esp_decrypt_node_index = node->index;
im->esp_encrypt_next_index = IPSEC_OUTPUT_NEXT_ESP_ENCRYPT;
im->esp_decrypt_next_index = IPSEC_INPUT_NEXT_ESP_DECRYPT;
im->cb.check_support_cb = ipsec_check_support;
if ((error = vlib_call_init_function (vm, ipsec_cli_init)))
return error;
if ((error = vlib_call_init_function (vm, ipsec_tunnel_if_init)))
return error;
esp_init ();
if ((error = ikev2_init (vm)))
return error;
return 0;
}
VLIB_INIT_FUNCTION (ipsec_init);
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
