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-rw-r--r--src/vnet/ipsec/ipsec.c581
1 files changed, 581 insertions, 0 deletions
diff --git a/src/vnet/ipsec/ipsec.c b/src/vnet/ipsec/ipsec.c
new file mode 100644
index 00000000000..ee85c402e86
--- /dev/null
+++ b/src/vnet/ipsec/ipsec.c
@@ -0,0 +1,581 @@
+/*
+ * 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>
+
+#if DPDK_CRYPTO==1
+#include <vnet/devices/dpdk/ipsec/esp.h>
+#define ESP_NODE "dpdk-esp-encrypt"
+#else
+#include <vnet/ipsec/esp.h>
+#define ESP_NODE "esp-encrypt"
+#endif
+
+#if DPDK_CRYPTO==0
+/* dummy function */
+static int
+add_del_sa_sess (u32 sa_index, u8 is_add)
+{
+ return 0;
+}
+#endif
+
+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);
+ add_del_sa_sess (sa_index, is_add);
+ 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 (add_del_sa_sess (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 (add_del_sa_sess (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_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_NODE);
+
+ ASSERT (node);
+ im->esp_encrypt_node_index = node->index;
+
+ node = vlib_get_node_by_name (vm, (u8 *) "ip4-lookup");
+ ASSERT (node);
+ im->ip4_lookup_node_index = node->index;
+
+ 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:
+ */