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+/*
+ * 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.
+ */
+/*
+ * ip/ip6.h: ip6 main include file
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef included_ip_ip6_h
+#define included_ip_ip6_h
+
+#include <vlib/mc.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/ip/lookup.h>
+
+#include <vppinfra/bihash_24_8.h>
+#include <vppinfra/bihash_template.h>
+
+/*
+ * Default size of the ip6 fib hash table
+ */
+#define IP6_FIB_DEFAULT_HASH_NUM_BUCKETS (64 * 1024)
+#define IP6_FIB_DEFAULT_HASH_MEMORY_SIZE (32<<20)
+
+typedef struct {
+ ip6_address_t addr;
+ u32 dst_address_length;
+ u32 vrf_index;
+} ip6_fib_key_t;
+
+typedef struct {
+ /* Table ID (hash key) for this FIB. */
+ u32 table_id;
+
+ /* Index into FIB vector. */
+ u32 index;
+
+ /* flow hash configuration */
+ u32 flow_hash_config;
+} ip6_fib_t;
+
+struct ip6_main_t;
+
+typedef void (ip6_add_del_route_function_t)
+ (struct ip6_main_t * im,
+ uword opaque,
+ ip6_fib_t * fib,
+ u32 flags,
+ ip6_address_t * address,
+ u32 address_length,
+ void * old_result,
+ void * new_result);
+
+typedef struct {
+ ip6_add_del_route_function_t * function;
+ uword required_flags;
+ uword function_opaque;
+} ip6_add_del_route_callback_t;
+
+typedef void (ip6_add_del_interface_address_function_t)
+ (struct ip6_main_t * im,
+ uword opaque,
+ u32 sw_if_index,
+ ip6_address_t * address,
+ u32 address_length,
+ u32 if_address_index,
+ u32 is_del);
+
+typedef struct {
+ ip6_add_del_interface_address_function_t * function;
+ uword function_opaque;
+} ip6_add_del_interface_address_callback_t;
+
+typedef enum {
+ /* First check access list to either permit or deny this
+ packet based on classification. */
+ IP6_RX_FEATURE_CHECK_ACCESS,
+
+ /* RPF check: verify that source address is reachable via
+ RX interface or via any interface. */
+ IP6_RX_FEATURE_CHECK_SOURCE_REACHABLE_VIA_RX,
+ IP6_RX_FEATURE_CHECK_SOURCE_REACHABLE_VIA_ANY,
+
+ /* IPSec */
+ IP6_RX_FEATURE_IPSEC,
+
+ /* Intercept and decap L2TPv3 packets. */
+ IP6_RX_FEATURE_L2TPV3,
+
+ /* vPath forwarding: won't return to call next feature
+ so any feature needed before vPath forwarding must be prior
+ to this entry */
+ IP6_RX_FEATURE_VPATH,
+
+ /* Must be last: perform forwarding lookup. */
+ IP6_RX_FEATURE_LOOKUP,
+
+ IP6_N_RX_FEATURE,
+} ip6_rx_feature_type_t;
+
+typedef struct ip6_main_t {
+ BVT(clib_bihash) ip6_lookup_table;
+
+ ip_lookup_main_t lookup_main;
+
+ /* bitmap / refcounts / vector of mask widths to search */
+ uword * non_empty_dst_address_length_bitmap;
+ u8 * prefix_lengths_in_search_order;
+ i32 dst_address_length_refcounts[129];
+
+ /* Vector of FIBs. */
+ ip6_fib_t * fibs;
+
+ ip6_address_t fib_masks[129];
+
+ /* Table index indexed by software interface. */
+ u32 * fib_index_by_sw_if_index;
+
+ /* Hash table mapping table id to fib index.
+ ID space is not necessarily dense; index space is dense. */
+ uword * fib_index_by_table_id;
+
+ /* Vector of functions to call when routes are added/deleted. */
+ ip6_add_del_route_callback_t * add_del_route_callbacks;
+
+ /* Hash table mapping interface rewrite adjacency index by sw if index. */
+ uword * interface_route_adj_index_by_sw_if_index;
+
+ /* Functions to call when interface address changes. */
+ ip6_add_del_interface_address_callback_t * add_del_interface_address_callbacks;
+
+ /* Template used to generate IP6 neighbor solicitation packets. */
+ vlib_packet_template_t discover_neighbor_packet_template;
+
+ u32 * discover_neighbor_next_index_by_hw_if_index;
+
+ /* ip6 lookup table config parameters */
+ u32 lookup_table_nbuckets;
+ uword lookup_table_size;
+
+ /* Seed for Jenkins hash used to compute ip6 flow hash. */
+ u32 flow_hash_seed;
+
+ struct {
+ /* TTL to use for host generated packets. */
+ u8 ttl;
+
+ u8 pad[3];
+ } host_config;
+} ip6_main_t;
+
+/* Global ip6 main structure. */
+extern ip6_main_t ip6_main;
+
+/* Global ip6 input node. Errors get attached to ip6 input node. */
+extern vlib_node_registration_t ip6_input_node;
+extern vlib_node_registration_t ip6_rewrite_node;
+extern vlib_node_registration_t ip6_discover_neighbor_node;
+
+extern vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node;
+
+/* ipv6 neighbor discovery - timer/event types */
+typedef enum {
+ ICMP6_ND_EVENT_INIT,
+} ip6_icmp_neighbor_discovery_event_type_t;
+
+typedef union {
+ u32 add_del_swindex;
+ struct {
+ u32 up_down_swindex;
+ u32 fib_index;
+ } up_down_event;
+} ip6_icmp_neighbor_discovery_event_data_t;
+
+u32 ip6_fib_lookup (ip6_main_t * im, u32 sw_if_index, ip6_address_t * dst);
+u32 ip6_fib_lookup_with_table (ip6_main_t * im, u32 fib_index,
+ ip6_address_t * dst);
+ip6_fib_t * find_ip6_fib_by_table_index_or_id (ip6_main_t * im,
+ u32 table_index_or_id,
+ u32 flags);
+
+always_inline uword
+ip6_destination_matches_route (ip6_main_t * im,
+ ip6_address_t * key,
+ ip6_address_t * dest,
+ uword dest_length)
+{
+ int i;
+ for (i = 0; i < ARRAY_LEN (key->as_uword); i++)
+ {
+ if ((key->as_uword[i] ^ dest->as_uword[i]) & im->fib_masks[dest_length].as_uword[i])
+ return 0;
+ }
+ return 1;
+}
+
+always_inline uword
+ip6_destination_matches_interface (ip6_main_t * im,
+ ip6_address_t * key,
+ ip_interface_address_t * ia)
+{
+ ip6_address_t * a = ip_interface_address_get_address (&im->lookup_main, ia);
+ return ip6_destination_matches_route (im, key, a, ia->address_length);
+}
+
+/* As above but allows for unaligned destinations (e.g. works right from IP header of packet). */
+always_inline uword
+ip6_unaligned_destination_matches_route (ip6_main_t * im,
+ ip6_address_t * key,
+ ip6_address_t * dest,
+ uword dest_length)
+{
+ int i;
+ for (i = 0; i < ARRAY_LEN (key->as_uword); i++)
+ {
+ if ((clib_mem_unaligned (&key->as_uword[i], uword) ^ dest->as_uword[i]) & im->fib_masks[dest_length].as_uword[i])
+ return 0;
+ }
+ return 1;
+}
+
+always_inline void
+ip6_src_address_for_packet (ip6_main_t * im, vlib_buffer_t * p, ip6_address_t * src, u32 sw_if_index)
+{
+ ip_lookup_main_t * lm = &im->lookup_main;
+ ip_interface_address_t * ia = ip_interface_address_for_packet (lm, p, sw_if_index);
+ ip6_address_t * a = ip_interface_address_get_address (lm, ia);
+ *src = a[0];
+}
+
+always_inline u32
+ip6_src_lookup_for_packet (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i)
+{
+ if (vnet_buffer (b)->ip.adj_index[VLIB_RX] == ~0)
+ vnet_buffer (b)->ip.adj_index[VLIB_RX]
+ = ip6_fib_lookup (im, vnet_buffer (b)->sw_if_index[VLIB_RX],
+ &i->src_address);
+ return vnet_buffer (b)->ip.adj_index[VLIB_RX];
+}
+
+/* Find interface address which matches destination. */
+always_inline ip6_address_t *
+ip6_interface_address_matching_destination (ip6_main_t * im, ip6_address_t * dst, u32 sw_if_index,
+ ip_interface_address_t ** result_ia)
+{
+ ip_lookup_main_t * lm = &im->lookup_main;
+ ip_interface_address_t * ia;
+ ip6_address_t * result = 0;
+
+ foreach_ip_interface_address (lm, ia, sw_if_index,
+ 1 /* honor unnumbered */,
+ ({
+ ip6_address_t * a = ip_interface_address_get_address (lm, ia);
+ if (ip6_destination_matches_route (im, dst, a, ia->address_length))
+ {
+ result = a;
+ break;
+ }
+ }));
+ if (result_ia)
+ *result_ia = result ? ia : 0;
+ return result;
+}
+
+clib_error_t *
+ip6_add_del_interface_address (vlib_main_t * vm, u32 sw_if_index,
+ ip6_address_t * address, u32 address_length,
+ u32 is_del);
+
+int ip6_address_compare (ip6_address_t * a1, ip6_address_t * a2);
+
+/* Add/del a route to the FIB. */
+
+#define IP6_ROUTE_FLAG_ADD (0 << 0)
+#define IP6_ROUTE_FLAG_DEL (1 << 0)
+#define IP6_ROUTE_FLAG_TABLE_ID (0 << 1)
+#define IP6_ROUTE_FLAG_FIB_INDEX (1 << 1)
+#define IP6_ROUTE_FLAG_KEEP_OLD_ADJACENCY (1 << 2)
+#define IP6_ROUTE_FLAG_NO_REDISTRIBUTE (1 << 3)
+#define IP6_ROUTE_FLAG_NOT_LAST_IN_GROUP (1 << 4)
+/* Dynamic route created via neighbor discovery. */
+#define IP6_ROUTE_FLAG_NEIGHBOR (1 << 5)
+
+typedef struct {
+ /* IP6_ROUTE_FLAG_* */
+ u32 flags;
+
+ /* Either index of fib or table_id to hash and get fib.
+ IP6_ROUTE_FLAG_FIB_INDEX specifies index; otherwise table_id is assumed. */
+ u32 table_index_or_table_id;
+
+ /* Destination address (prefix) and length. */
+ ip6_address_t dst_address;
+ u32 dst_address_length;
+
+ /* Adjacency to use for this destination. */
+ u32 adj_index;
+
+ /* If specified adjacencies to add and then
+ use for this destination. add_adj/n_add_adj
+ are override adj_index if specified. */
+ ip_adjacency_t * add_adj;
+ u32 n_add_adj;
+} ip6_add_del_route_args_t;
+
+void ip6_add_del_route (ip6_main_t * im, ip6_add_del_route_args_t * args);
+
+void ip6_add_del_route_next_hop (ip6_main_t * im,
+ u32 flags,
+ ip6_address_t * dst_address,
+ u32 dst_address_length,
+ ip6_address_t * next_hop,
+ u32 next_hop_sw_if_index,
+ u32 next_hop_weight, u32 adj_index,
+ u32 explicit_fib_index);
+u32
+ip6_get_route (ip6_main_t * im,
+ u32 fib_index_or_table_id,
+ u32 flags,
+ ip6_address_t * address,
+ u32 address_length);
+
+void
+ip6_foreach_matching_route (ip6_main_t * im,
+ u32 table_index_or_table_id,
+ u32 flags,
+ ip6_address_t * address,
+ u32 address_length,
+ ip6_address_t ** results,
+ u8 ** result_length);
+
+void ip6_delete_matching_routes (ip6_main_t * im,
+ u32 table_index_or_table_id,
+ u32 flags,
+ ip6_address_t * address,
+ u32 address_length);
+
+void ip6_maybe_remap_adjacencies (ip6_main_t * im,
+ u32 table_index_or_table_id,
+ u32 flags);
+
+void ip6_adjacency_set_interface_route (vnet_main_t * vnm,
+ ip_adjacency_t * adj,
+ u32 sw_if_index,
+ u32 if_address_index);
+
+clib_error_t *
+ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index);
+
+clib_error_t *
+ip6_set_neighbor_limit (u32 neighbor_limit);
+
+uword
+ip6_tcp_register_listener (vlib_main_t * vm,
+ u16 dst_port,
+ u32 next_node_index);
+uword
+ip6_udp_register_listener (vlib_main_t * vm,
+ u16 dst_port,
+ u32 next_node_index);
+
+u16 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0, ip6_header_t * ip0, int *bogus_lengthp);
+
+void ip6_register_protocol (u32 protocol, u32 node_index);
+
+serialize_function_t serialize_vnet_ip6_main, unserialize_vnet_ip6_main;
+
+int
+vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
+ u32 sw_if_index,
+ ip6_address_t * a,
+ u8 * link_layer_address,
+ uword n_bytes_link_layer_address);
+int
+vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm,
+ u32 sw_if_index,
+ ip6_address_t * a,
+ u8 * link_layer_address,
+ uword n_bytes_link_layer_address);
+void
+vnet_ip6_fib_init (ip6_main_t * im, u32 fib_index);
+
+void
+ip6_link_local_address_from_ethernet_mac_address (ip6_address_t *ip,
+ u8 *mac);
+
+void
+ip6_ethernet_mac_address_from_link_local_address (u8 *mac,
+ ip6_address_t *ip);
+
+int vnet_set_ip6_flow_hash (u32 table_id, u32 flow_hash_config);
+
+int
+ip6_neighbor_ra_config(vlib_main_t * vm, u32 sw_if_index,
+ u8 surpress, u8 managed, u8 other,
+ u8 ll_option, u8 send_unicast, u8 cease,
+ u8 use_lifetime, u32 lifetime,
+ u32 initial_count, u32 initial_interval,
+ u32 max_interval, u32 min_interval,
+ u8 is_no);
+
+int
+ip6_neighbor_ra_prefix(vlib_main_t * vm, u32 sw_if_index,
+ ip6_address_t *prefix_addr, u8 prefix_len,
+ u8 use_default, u32 val_lifetime, u32 pref_lifetime,
+ u8 no_advertise, u8 off_link, u8 no_autoconfig, u8 no_onlink,
+ u8 is_no);
+
+
+clib_error_t *
+enable_ip6_interface(vlib_main_t * vm,
+ u32 sw_if_index);
+
+clib_error_t *
+disable_ip6_interface(vlib_main_t * vm,
+ u32 sw_if_index);
+
+int
+ip6_interface_enabled(vlib_main_t * vm,
+ u32 sw_if_index);
+
+clib_error_t *
+set_ip6_link_local_address(vlib_main_t * vm,
+ u32 sw_if_index,
+ ip6_address_t *address,
+ u8 address_length);
+
+void vnet_register_ip6_neighbor_resolution_event(vnet_main_t * vnm,
+ void * address_arg,
+ uword node_index,
+ uword type_opaque,
+ uword data);
+
+int vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
+ u32 table_index);
+extern vlib_node_registration_t ip6_lookup_node;
+
+/* Compute flow hash. We'll use it to select which Sponge to use for this
+ flow. And other things. */
+always_inline u32
+ip6_compute_flow_hash (ip6_header_t * ip, u32 flow_hash_config)
+{
+ tcp_header_t * tcp = (void *) (ip + 1);
+ u64 a, b, c;
+ u64 t1, t2;
+ uword is_tcp_udp = (ip->protocol == IP_PROTOCOL_TCP
+ || ip->protocol == IP_PROTOCOL_UDP);
+
+ t1 = (ip->src_address.as_u64[0] ^ ip->src_address.as_u64[1]);
+ t1 = (flow_hash_config & IP_FLOW_HASH_SRC_ADDR) ? t1 : 0;
+
+ t2 = (ip->dst_address.as_u64[0] ^ ip->dst_address.as_u64[1]);
+ t2 = (flow_hash_config & IP_FLOW_HASH_DST_ADDR) ? t2 : 0;
+
+ a = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t2 : t1;
+ b = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ? t1 : t2;
+ b ^= (flow_hash_config & IP_FLOW_HASH_PROTO) ? ip->protocol : 0;
+
+ t1 = is_tcp_udp ? tcp->ports.src : 0;
+ t2 = is_tcp_udp ? tcp->ports.dst : 0;
+
+ t1 = (flow_hash_config & IP_FLOW_HASH_SRC_PORT) ? t1 : 0;
+ t2 = (flow_hash_config & IP_FLOW_HASH_DST_PORT) ? t2 : 0;
+
+ c = (flow_hash_config & IP_FLOW_HASH_REVERSE_SRC_DST) ?
+ ((t1<<16) | t2) : ((t2<<16) | t1);
+
+ hash_mix64 (a, b, c);
+ return (u32) c;
+}
+
+#endif /* included_ip_ip6_h */