+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_aligned_zero (im->sad, sa, CLIB_CACHE_LINE_BYTES);
+
+ 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;
+ ipsec_sa_set_crypto_alg (sa, crypto_alg);
+ clib_memcpy (&sa->crypto_key, ck, sizeof (sa->crypto_key));
+ 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);
+
+ if (flags & IPSEC_SA_FLAG_USE_ESN)
+ ipsec_sa_set_USE_ESN (sa);
+ if (flags & IPSEC_SA_FLAG_USE_ANTI_REPLAY)
+ ipsec_sa_set_USE_ANTI_REPLAY (sa);
+ if (flags & IPSEC_SA_FLAG_IS_TUNNEL)
+ ipsec_sa_set_IS_TUNNEL (sa);
+ if (flags & IPSEC_SA_FLAG_IS_TUNNEL_V6)
+ ipsec_sa_set_IS_TUNNEL_V6 (sa);
+ if (flags & IPSEC_SA_FLAG_UDP_ENCAP)
+ ipsec_sa_set_UDP_ENCAP (sa);
+
+ 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 (ipsec_sa_is_set_IS_TUNNEL (sa))
+ {
+ fib_protocol_t fproto = (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ?
+ FIB_PROTOCOL_IP6 : FIB_PROTOCOL_IP4);
+ fib_prefix_t pfx = {
+ .fp_addr = sa->tunnel_dst_addr,
+ .fp_len = (ipsec_sa_is_set_IS_TUNNEL_V6 (sa) ? 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);
+
+ /* generate header templates */
+ if (ipsec_sa_is_set_IS_TUNNEL_V6 (sa))
+ {
+ 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 (ipsec_sa_is_set_UDP_ENCAP (sa))
+ 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 (ipsec_sa_is_set_UDP_ENCAP (sa))
+ 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 (ipsec_sa_is_set_UDP_ENCAP (sa))
+ {
+ 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)
+ *sa_out_index = sa_index;
+
+ return (0);
+}
+
+u32
+ipsec_sa_del (u32 id)