*/
#include <vnet/ipsec/ipsec.h>
+#include <vnet/ipsec/esp.h>
+#include <vnet/udp/udp.h>
#include <vnet/fib/fib_table.h>
+/**
+ * @brief
+ * SA packet & bytes counters
+ */
+vlib_combined_counter_main_t ipsec_sa_counters = {
+ .name = "SA",
+ .stat_segment_name = "/net/ipsec/sa",
+};
+
+
static clib_error_t *
ipsec_call_add_del_callbacks (ipsec_main_t * im, ipsec_sa_t * sa,
u32 sa_index, int is_add)
/**
* 'stack' (resolve the recursion for) the SA tunnel destination
*/
-static void
+void
ipsec_sa_stack (ipsec_sa_t * sa)
{
+ ipsec_main_t *im = &ipsec_main;
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_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);
+ dpo_stack_from_node ((sa->is_tunnel_ip6 ?
+ im->ah6_encrypt_node_index :
+ im->ah4_encrypt_node_index),
+ &sa->dpo[IPSEC_PROTOCOL_AH], &tmp);
+ dpo_stack_from_node ((sa->is_tunnel_ip6 ?
+ im->esp6_encrypt_node_index :
+ im->esp4_encrypt_node_index),
+ &sa->dpo[IPSEC_PROTOCOL_ESP], &tmp);
+ dpo_reset (&tmp);
+}
+
+void
+ipsec_sa_set_crypto_alg (ipsec_sa_t * sa, ipsec_crypto_alg_t crypto_alg)
+{
+ ipsec_main_t *im = &ipsec_main;
+ sa->crypto_alg = crypto_alg;
+ sa->crypto_iv_size = im->crypto_algs[crypto_alg].iv_size;
+ sa->crypto_block_size = im->crypto_algs[crypto_alg].block_size;
+ sa->crypto_enc_op_type = im->crypto_algs[crypto_alg].enc_op_type;
+ sa->crypto_dec_op_type = im->crypto_algs[crypto_alg].dec_op_type;
+ ASSERT (sa->crypto_block_size <= ESP_MAX_BLOCK_SIZE);
+}
+
+void
+ipsec_sa_set_integ_alg (ipsec_sa_t * sa, ipsec_integ_alg_t integ_alg)
+{
+ ipsec_main_t *im = &ipsec_main;
+ sa->integ_alg = integ_alg;
+ sa->integ_trunc_size = im->integ_algs[integ_alg].trunc_size;
+ sa->integ_op_type = im->integ_algs[integ_alg].op_type;
+ ASSERT (sa->integ_trunc_size <= ESP_MAX_ICV_SIZE);
}
int
fib_node_init (&sa->node, FIB_NODE_TYPE_IPSEC_SA);
sa_index = sa - im->sad;
+ vlib_validate_combined_counter (&ipsec_sa_counters, sa_index);
+ vlib_zero_combined_counter (&ipsec_sa_counters, sa_index);
+
sa->id = id;
sa->spi = spi;
+ sa->stat_index = sa_index;
sa->protocol = proto;
- sa->crypto_alg = crypto_alg;
+ ipsec_sa_set_crypto_alg (sa, crypto_alg);
clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key));
- sa->integ_alg = integ_alg;
+ ipsec_sa_set_integ_alg (sa, 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);
sa->sibling = fib_entry_child_add (sa->fib_entry_index,
FIB_NODE_TYPE_IPSEC_SA, sa_index);
ipsec_sa_stack (sa);
+
+ /* generate header templates */
+ if (sa->is_tunnel_ip6)
+ {
+ sa->ip6_hdr.ip_version_traffic_class_and_flow_label = 0x60;
+ sa->ip6_hdr.hop_limit = 254;
+ sa->ip6_hdr.src_address.as_u64[0] =
+ sa->tunnel_src_addr.ip6.as_u64[0];
+ sa->ip6_hdr.src_address.as_u64[1] =
+ sa->tunnel_src_addr.ip6.as_u64[1];
+ sa->ip6_hdr.dst_address.as_u64[0] =
+ sa->tunnel_dst_addr.ip6.as_u64[0];
+ sa->ip6_hdr.dst_address.as_u64[1] =
+ sa->tunnel_dst_addr.ip6.as_u64[1];
+ if (sa->udp_encap)
+ sa->ip6_hdr.protocol = IP_PROTOCOL_UDP;
+ else
+ sa->ip6_hdr.protocol = IP_PROTOCOL_IPSEC_ESP;
+ }
+ else
+ {
+ sa->ip4_hdr.ip_version_and_header_length = 0x45;
+ sa->ip4_hdr.ttl = 254;
+ sa->ip4_hdr.src_address.as_u32 = sa->tunnel_src_addr.ip4.as_u32;
+ sa->ip4_hdr.dst_address.as_u32 = sa->tunnel_dst_addr.ip4.as_u32;
+
+ if (sa->udp_encap)
+ sa->ip4_hdr.protocol = IP_PROTOCOL_UDP;
+ else
+ sa->ip4_hdr.protocol = IP_PROTOCOL_IPSEC_ESP;
+ sa->ip4_hdr.checksum = ip4_header_checksum (&sa->ip4_hdr);
+ }
}
+
+ if (sa->udp_encap)
+ {
+ sa->udp_hdr.src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
+ sa->udp_hdr.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
+ }
+
hash_set (im->sa_index_by_sa_id, sa->id, sa_index);
if (sa_out_index)
{
err = ipsec_call_add_del_callbacks (im, sa, sa_index, 0);
if (err)
- return VNET_API_ERROR_SYSCALL_ERROR_1;
+ {
+ clib_error_free (err);
+ return VNET_API_ERROR_SYSCALL_ERROR_1;
+ }
}
return 0;
return p[0];
}
+void
+ipsec_sa_walk (ipsec_sa_walk_cb_t cb, void *ctx)
+{
+ ipsec_main_t *im = &ipsec_main;
+ ipsec_sa_t *sa;
+
+ /* *INDENT-OFF* */
+ pool_foreach (sa, im->sad,
+ ({
+ if (WALK_CONTINUE != cb(sa, ctx))
+ break;
+ }));
+ /* *INDENT-ON* */
+}
+
/**
* Function definition to get a FIB node from its index
*/