*/
#include <vnet/ipsec/ipsec.h>
+#include <vnet/fib/fib_table.h>
static clib_error_t *
ipsec_call_add_del_callbacks (ipsec_main_t * im, ipsec_sa_t * sa,
return 0;
}
+void
+ipsec_mk_key (ipsec_key_t * key, const u8 * data, u8 len)
+{
+ memset (key, 0, sizeof (*key));
+
+ if (len > sizeof (key->data))
+ key->len = sizeof (key->data);
+ else
+ key->len = len;
+
+ memcpy (key->data, data, key->len);
+}
+
+/**
+ * 'stack' (resolve the recursion for) the SA tunnel destination
+ */
+static void
+ipsec_sa_stack (ipsec_sa_t * sa)
+{
+ fib_forward_chain_type_t fct;
+ dpo_id_t tmp = DPO_INVALID;
+ vlib_node_t *node;
+
+ fct = fib_forw_chain_type_from_fib_proto ((sa->is_tunnel_ip6 ?
+ FIB_PROTOCOL_IP6 :
+ FIB_PROTOCOL_IP4));
+
+ fib_entry_contribute_forwarding (sa->fib_entry_index, fct, &tmp);
+
+ node = vlib_get_node_by_name (vlib_get_main (),
+ (sa->is_tunnel_ip6 ?
+ (u8 *) "ah6-encrypt" :
+ (u8 *) "ah4-encrypt"));
+ dpo_stack_from_node (node->index, &sa->dpo[IPSEC_PROTOCOL_AH], &tmp);
+
+ node = vlib_get_node_by_name (vlib_get_main (),
+ (sa->is_tunnel_ip6 ?
+ (u8 *) "esp6-encrypt" :
+ (u8 *) "esp4-encrypt"));
+ dpo_stack_from_node (node->index, &sa->dpo[IPSEC_PROTOCOL_ESP], &tmp);
+}
+
int
-ipsec_add_del_sa (vlib_main_t * vm, ipsec_sa_t * new_sa, int is_add)
+ipsec_sa_add (u32 id,
+ u32 spi,
+ ipsec_protocol_t proto,
+ ipsec_crypto_alg_t crypto_alg,
+ const ipsec_key_t * ck,
+ ipsec_integ_alg_t integ_alg,
+ const ipsec_key_t * ik,
+ ipsec_sa_flags_t flags,
+ u32 tx_table_id,
+ const ip46_address_t * tun_src,
+ const ip46_address_t * tun_dst, u32 * sa_out_index)
+{
+ ipsec_main_t *im = &ipsec_main;
+ clib_error_t *err;
+ ipsec_sa_t *sa;
+ u32 sa_index;
+ uword *p;
+
+ p = hash_get (im->sa_index_by_sa_id, id);
+ if (p)
+ return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
+
+ pool_get_zero (im->sad, sa);
+
+ fib_node_init (&sa->node, FIB_NODE_TYPE_IPSEC_SA);
+ sa_index = sa - im->sad;
+
+ sa->id = id;
+ sa->spi = spi;
+ sa->protocol = proto;
+ sa->crypto_alg = crypto_alg;
+ clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key));
+ sa->integ_alg = integ_alg;
+ clib_memcpy (&sa->integ_key, ik, sizeof (sa->integ_key));
+ ip46_address_copy (&sa->tunnel_src_addr, tun_src);
+ ip46_address_copy (&sa->tunnel_dst_addr, tun_dst);
+
+ if (flags & IPSEC_SA_FLAG_USE_EXTENDED_SEQ_NUM)
+ sa->use_esn = 1;
+ if (flags & IPSEC_SA_FLAG_USE_ANTI_REPLAY)
+ sa->use_anti_replay = 1;
+ if (flags & IPSEC_SA_FLAG_IS_TUNNEL)
+ sa->is_tunnel = 1;
+ if (flags & IPSEC_SA_FLAG_IS_TUNNEL_V6)
+ sa->is_tunnel_ip6 = 1;
+ if (flags & IPSEC_SA_FLAG_UDP_ENCAP)
+ sa->udp_encap = 1;
+
+ err = ipsec_check_support_cb (im, sa);
+ if (err)
+ {
+ clib_warning ("%s", err->what);
+ pool_put (im->sad, sa);
+ return VNET_API_ERROR_UNIMPLEMENTED;
+ }
+
+ err = ipsec_call_add_del_callbacks (im, sa, sa_index, 1);
+ if (err)
+ {
+ pool_put (im->sad, sa);
+ return VNET_API_ERROR_SYSCALL_ERROR_1;
+ }
+
+ if (sa->is_tunnel)
+ {
+ fib_protocol_t fproto = (sa->is_tunnel_ip6 ?
+ FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4);
+ fib_prefix_t pfx = {
+ .fp_addr = sa->tunnel_dst_addr,
+ .fp_len = (sa->is_tunnel_ip6 ? 128 : 32),
+ .fp_proto = fproto,
+ };
+ sa->tx_fib_index = fib_table_find (fproto, tx_table_id);
+ if (sa->tx_fib_index == ~((u32) 0))
+ {
+ pool_put (im->sad, sa);
+ return VNET_API_ERROR_NO_SUCH_FIB;
+ }
+
+ sa->fib_entry_index = fib_table_entry_special_add (sa->tx_fib_index,
+ &pfx,
+ FIB_SOURCE_RR,
+ FIB_ENTRY_FLAG_NONE);
+ sa->sibling = fib_entry_child_add (sa->fib_entry_index,
+ FIB_NODE_TYPE_IPSEC_SA, sa_index);
+ ipsec_sa_stack (sa);
+ }
+ hash_set (im->sa_index_by_sa_id, sa->id, sa_index);
+
+ if (sa_out_index)
+ *sa_out_index = sa_index;
+
+ return (0);
+}
+
+u32
+ipsec_sa_del (u32 id)
{
ipsec_main_t *im = &ipsec_main;
ipsec_sa_t *sa = 0;
u32 sa_index;
clib_error_t *err;
- clib_warning ("id %u spi %u", new_sa->id, new_sa->spi);
+ p = hash_get (im->sa_index_by_sa_id, id);
- p = hash_get (im->sa_index_by_sa_id, new_sa->id);
- if (p && is_add)
- return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
- if (!p && !is_add)
+ if (!p)
return VNET_API_ERROR_NO_SUCH_ENTRY;
- if (!is_add) /* delete */
+ sa_index = p[0];
+ sa = pool_elt_at_index (im->sad, sa_index);
+ if (ipsec_is_sa_used (sa_index))
{
- 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);
- err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
- if (err)
- return VNET_API_ERROR_SYSCALL_ERROR_1;
- pool_put (im->sad, sa);
+ clib_warning ("sa_id %u used in policy", sa->id);
+ /* sa used in policy */
+ return VNET_API_ERROR_SYSCALL_ERROR_1;
}
- else /* create new SA */
+ hash_unset (im->sa_index_by_sa_id, sa->id);
+ err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
+ if (err)
+ return VNET_API_ERROR_SYSCALL_ERROR_1;
+ if (sa->is_tunnel)
{
- 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);
- err = ipsec_call_add_del_callbacks (im, sa, sa_index, 1);
- if (err)
- return VNET_API_ERROR_SYSCALL_ERROR_1;
+ fib_entry_child_remove (sa->fib_entry_index, sa->sibling);
+ fib_table_entry_special_remove
+ (sa->tx_fib_index,
+ fib_entry_get_prefix (sa->fib_entry_index), FIB_SOURCE_RR);
+ dpo_reset (&sa->dpo[IPSEC_PROTOCOL_AH]);
+ dpo_reset (&sa->dpo[IPSEC_PROTOCOL_ESP]);
}
+ pool_put (im->sad, sa);
return 0;
}
}
int
-ipsec_set_sa_key (vlib_main_t * vm, ipsec_sa_t * sa_update)
+ipsec_set_sa_key (u32 id, const ipsec_key_t * ck, const ipsec_key_t * ik)
{
ipsec_main_t *im = &ipsec_main;
uword *p;
ipsec_sa_t *sa = 0;
clib_error_t *err;
- p = hash_get (im->sa_index_by_sa_id, sa_update->id);
+ p = hash_get (im->sa_index_by_sa_id, id);
if (!p)
return VNET_API_ERROR_SYSCALL_ERROR_1; /* no such sa-id */
sa = pool_elt_at_index (im->sad, sa_index);
/* new crypto key */
- if (0 < sa_update->crypto_key_len)
+ if (ck)
{
- clib_memcpy (sa->crypto_key, sa_update->crypto_key,
- sa_update->crypto_key_len);
- sa->crypto_key_len = sa_update->crypto_key_len;
+ clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key));
}
/* new integ key */
- if (0 < sa_update->integ_key_len)
+ if (ik)
{
- clib_memcpy (sa->integ_key, sa_update->integ_key,
- sa_update->integ_key_len);
- sa->integ_key_len = sa_update->integ_key_len;
+ clib_memcpy (&sa->integ_key, 0, sizeof (sa->integ_key));
}
- if (0 < sa_update->crypto_key_len || 0 < sa_update->integ_key_len)
+ if (ck || ik)
{
err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
if (err)
return p[0];
}
+/**
+ * Function definition to get a FIB node from its index
+ */
+static fib_node_t *
+ipsec_sa_fib_node_get (fib_node_index_t index)
+{
+ ipsec_main_t *im;
+ ipsec_sa_t *sa;
+
+ im = &ipsec_main;
+ sa = pool_elt_at_index (im->sad, index);
+
+ return (&sa->node);
+}
+
+/**
+ * Function definition to inform the FIB node that its last lock has gone.
+ */
+static void
+ipsec_sa_last_lock_gone (fib_node_t * node)
+{
+ /*
+ * The ipsec SA is a root of the graph. As such
+ * it never has children and thus is never locked.
+ */
+ ASSERT (0);
+}
+
+static ipsec_sa_t *
+ipsec_sa_from_fib_node (fib_node_t * node)
+{
+ ASSERT (FIB_NODE_TYPE_IPSEC_SA == node->fn_type);
+ return ((ipsec_sa_t *) (((char *) node) -
+ STRUCT_OFFSET_OF (ipsec_sa_t, node)));
+
+}
+
+/**
+ * Function definition to backwalk a FIB node
+ */
+static fib_node_back_walk_rc_t
+ipsec_sa_back_walk (fib_node_t * node, fib_node_back_walk_ctx_t * ctx)
+{
+ ipsec_sa_stack (ipsec_sa_from_fib_node (node));
+
+ return (FIB_NODE_BACK_WALK_CONTINUE);
+}
+
+/*
+ * Virtual function table registered by MPLS GRE tunnels
+ * for participation in the FIB object graph.
+ */
+const static fib_node_vft_t ipsec_sa_vft = {
+ .fnv_get = ipsec_sa_fib_node_get,
+ .fnv_last_lock = ipsec_sa_last_lock_gone,
+ .fnv_back_walk = ipsec_sa_back_walk,
+};
+
+/* force inclusion from application's main.c */
+clib_error_t *
+ipsec_sa_interface_init (vlib_main_t * vm)
+{
+ fib_node_register_type (FIB_NODE_TYPE_IPSEC_SA, &ipsec_sa_vft);
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (ipsec_sa_interface_init);
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff