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diff --git a/src/vnet/ip/ip6_neighbor.c b/src/vnet/ip/ip6_neighbor.c
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+/*
+ * ip/ip6_neighbor.c: IP6 neighbor handling
+ *
+ * Copyright (c) 2010 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/ip/ip.h>
+#include <vnet/ip/ip6_neighbor.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vppinfra/mhash.h>
+#include <vppinfra/md5.h>
+#include <vnet/adj/adj.h>
+#include <vnet/adj/adj_mcast.h>
+#include <vnet/fib/fib_table.h>
+#include <vnet/fib/ip6_fib.h>
+#include <vnet/mfib/ip6_mfib.h>
+
+/**
+ * @file
+ * @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
+ *
+ * The files contains the API and CLI code for managing IPv6 neighbor
+ * adjacency tables and neighbor discovery logic.
+ */
+
+/* can't use sizeof link_layer_address, that's 8 */
+#define ETHER_MAC_ADDR_LEN 6
+
+/* advertised prefix option */
+typedef struct
+{
+ /* basic advertised information */
+ ip6_address_t prefix;
+ u8 prefix_len;
+ int adv_on_link_flag;
+ int adv_autonomous_flag;
+ u32 adv_valid_lifetime_in_secs;
+ u32 adv_pref_lifetime_in_secs;
+
+ /* advertised values are computed from these times if decrementing */
+ f64 valid_lifetime_expires;
+ f64 pref_lifetime_expires;
+
+ /* local information */
+ int enabled;
+ int deprecated_prefix_flag;
+ int decrement_lifetime_flag;
+
+#define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
+#define DEF_ADV_VALID_LIFETIME 2592000
+#define DEF_ADV_PREF_LIFETIME 604800
+
+ /* extensions are added here, mobile, DNS etc.. */
+} ip6_radv_prefix_t;
+
+
+typedef struct
+{
+ /* group information */
+ u8 type;
+ ip6_address_t mcast_address;
+ u16 num_sources;
+ ip6_address_t *mcast_source_address_pool;
+} ip6_mldp_group_t;
+
+/* configured router advertisement information per ipv6 interface */
+typedef struct
+{
+
+ /* advertised config information, zero means unspecified */
+ u8 curr_hop_limit;
+ int adv_managed_flag;
+ int adv_other_flag;
+ u16 adv_router_lifetime_in_sec;
+ u32 adv_neighbor_reachable_time_in_msec;
+ u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
+
+ /* mtu option */
+ u32 adv_link_mtu;
+
+ /* source link layer option */
+ u8 link_layer_address[8];
+ u8 link_layer_addr_len;
+
+ /* prefix option */
+ ip6_radv_prefix_t *adv_prefixes_pool;
+
+ /* Hash table mapping address to index in interface advertised prefix pool. */
+ mhash_t address_to_prefix_index;
+
+ /* MLDP group information */
+ ip6_mldp_group_t *mldp_group_pool;
+
+ /* Hash table mapping address to index in mldp address pool. */
+ mhash_t address_to_mldp_index;
+
+ /* local information */
+ u32 sw_if_index;
+ int send_radv; /* radv on/off on this interface - set by config */
+ int cease_radv; /* we are ceasing to send - set byf config */
+ int send_unicast;
+ int adv_link_layer_address;
+ int prefix_option;
+ int failed_device_check;
+ int all_routers_mcast;
+ u32 seed;
+ u64 randomizer;
+ int ref_count;
+ adj_index_t mcast_adj_index;
+
+ /* timing information */
+#define DEF_MAX_RADV_INTERVAL 200
+#define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
+#define DEF_CURR_HOP_LIMIT 64
+#define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
+#define MAX_DEF_RTR_LIFETIME 9000
+
+#define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
+#define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
+#define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
+#define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
+#define MAX_RA_DELAY_TIME .5 /* seconds */
+
+ f64 max_radv_interval;
+ f64 min_radv_interval;
+ f64 min_delay_between_radv;
+ f64 max_delay_between_radv;
+ f64 max_rtr_default_lifetime;
+
+ f64 last_radv_time;
+ f64 last_multicast_time;
+ f64 next_multicast_time;
+
+
+ u32 initial_adverts_count;
+ f64 initial_adverts_interval;
+ u32 initial_adverts_sent;
+
+ /* stats */
+ u32 n_advertisements_sent;
+ u32 n_solicitations_rcvd;
+ u32 n_solicitations_dropped;
+
+ /* Link local address to use (defaults to underlying physical for logical interfaces */
+ ip6_address_t link_local_address;
+} ip6_radv_t;
+
+typedef struct
+{
+ u32 next_index;
+ uword node_index;
+ uword type_opaque;
+ uword data;
+ /* Used for nd event notification only */
+ void *data_callback;
+ u32 pid;
+} pending_resolution_t;
+
+
+typedef struct
+{
+ /* Hash tables mapping name to opcode. */
+ uword *opcode_by_name;
+
+ /* lite beer "glean" adjacency handling */
+ mhash_t pending_resolutions_by_address;
+ pending_resolution_t *pending_resolutions;
+
+ /* Mac address change notification */
+ mhash_t mac_changes_by_address;
+ pending_resolution_t *mac_changes;
+
+ u32 *neighbor_input_next_index_by_hw_if_index;
+
+ ip6_neighbor_t *neighbor_pool;
+
+ mhash_t neighbor_index_by_key;
+
+ u32 *if_radv_pool_index_by_sw_if_index;
+
+ ip6_radv_t *if_radv_pool;
+
+ /* Neighbor attack mitigation */
+ u32 limit_neighbor_cache_size;
+ u32 neighbor_delete_rotor;
+
+ /* Wildcard nd report publisher */
+ uword wc_ip6_nd_publisher_node;
+ uword wc_ip6_nd_publisher_et;
+} ip6_neighbor_main_t;
+
+/* 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;
+
+static ip6_neighbor_main_t ip6_neighbor_main;
+static ip6_address_t ip6a_zero; /* ip6 address 0 */
+
+static void wc_nd_signal_report (wc_nd_report_t * r);
+
+/**
+ * @brief publish wildcard arp event
+ * @param sw_if_index The interface on which the ARP entires are acted
+ */
+static int
+vnet_nd_wc_publish (u32 sw_if_index, u8 * mac, ip6_address_t * ip6)
+{
+ wc_nd_report_t r = {
+ .sw_if_index = sw_if_index,
+ .ip6 = *ip6,
+ };
+ memcpy (r.mac, mac, sizeof r.mac);
+
+ void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
+ vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
+ return 0;
+}
+
+static void
+wc_nd_signal_report (wc_nd_report_t * r)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ uword ni = nm->wc_ip6_nd_publisher_node;
+ uword et = nm->wc_ip6_nd_publisher_et;
+
+ if (ni == (uword) ~ 0)
+ return;
+ wc_nd_report_t *q =
+ vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
+
+ *q = *r;
+}
+
+void
+wc_nd_set_publisher_node (uword node_index, uword event_type)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ nm->wc_ip6_nd_publisher_node = node_index;
+ nm->wc_ip6_nd_publisher_et = event_type;
+}
+
+static u8 *
+format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
+{
+ vlib_main_t *vm = va_arg (*va, vlib_main_t *);
+ ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_sw_interface_t *si;
+ u8 *flags = 0;
+
+ if (!n)
+ return format (s, "%=12s%=20s%=6s%=20s%=40s", "Time", "Address", "Flags",
+ "Link layer", "Interface");
+
+ if (n->flags & IP6_NEIGHBOR_FLAG_DYNAMIC)
+ flags = format (flags, "D");
+
+ if (n->flags & IP6_NEIGHBOR_FLAG_STATIC)
+ flags = format (flags, "S");
+
+ if (n->flags & IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY)
+ flags = format (flags, "N");
+
+ si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
+ s = format (s, "%=12U%=20U%=6s%=20U%=40U",
+ format_vlib_cpu_time, vm, n->cpu_time_last_updated,
+ format_ip6_address, &n->key.ip6_address,
+ flags ? (char *) flags : "",
+ format_ethernet_address, n->link_layer_address,
+ format_vnet_sw_interface_name, vnm, si);
+
+ vec_free (flags);
+ return s;
+}
+
+static void
+ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
+{
+ if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
+ {
+ fib_prefix_t pfx = {
+ .fp_len = 128,
+ .fp_proto = FIB_PROTOCOL_IP6,
+ .fp_addr.ip6 = n->key.ip6_address,
+ };
+ fib_table_entry_path_remove (fib_index,
+ &pfx,
+ FIB_SOURCE_ADJ,
+ DPO_PROTO_IP6,
+ &pfx.fp_addr,
+ n->key.sw_if_index, ~0,
+ 1, FIB_ROUTE_PATH_FLAG_NONE);
+ }
+}
+
+static clib_error_t *
+ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm,
+ u32 sw_if_index, u32 flags)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_neighbor_t *n;
+
+ if (!(flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
+ {
+ u32 i, *to_delete = 0;
+
+ /* *INDENT-OFF* */
+ pool_foreach (n, nm->neighbor_pool,
+ ({
+ if (n->key.sw_if_index == sw_if_index)
+ vec_add1 (to_delete, n - nm->neighbor_pool);
+ }));
+ /* *INDENT-ON* */
+
+ for (i = 0; i < vec_len (to_delete); i++)
+ {
+ n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
+ mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
+ ip6_neighbor_adj_fib_remove (n,
+ ip6_fib_table_get_index_for_sw_if_index
+ (n->key.sw_if_index));
+ pool_put (nm->neighbor_pool, n);
+ }
+ vec_free (to_delete);
+ }
+
+ return 0;
+}
+
+VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down);
+
+static void
+unset_random_neighbor_entry (void)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ vnet_main_t *vnm = vnet_get_main ();
+ vlib_main_t *vm = vnm->vlib_main;
+ ip6_neighbor_t *e;
+ u32 index;
+
+ index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
+ nm->neighbor_delete_rotor = index;
+
+ /* Try again from elt 0, could happen if an intfc goes down */
+ if (index == ~0)
+ {
+ index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
+ nm->neighbor_delete_rotor = index;
+ }
+
+ /* Nothing left in the pool */
+ if (index == ~0)
+ return;
+
+ e = pool_elt_at_index (nm->neighbor_pool, index);
+
+ vnet_unset_ip6_ethernet_neighbor (vm, e->key.sw_if_index,
+ &e->key.ip6_address,
+ e->link_layer_address,
+ ETHER_MAC_ADDR_LEN);
+}
+
+typedef struct
+{
+ u8 is_add;
+ u8 is_static;
+ u8 is_no_fib_entry;
+ u8 link_layer_address[6];
+ u32 sw_if_index;
+ ip6_address_t addr;
+} ip6_neighbor_set_unset_rpc_args_t;
+
+static void ip6_neighbor_set_unset_rpc_callback
+ (ip6_neighbor_set_unset_rpc_args_t * a);
+
+static void set_unset_ip6_neighbor_rpc
+ (vlib_main_t * vm,
+ u32 sw_if_index,
+ ip6_address_t * a, u8 * link_layer_address, int is_add, int is_static,
+ int is_no_fib_entry)
+{
+ ip6_neighbor_set_unset_rpc_args_t args;
+ void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
+
+ args.sw_if_index = sw_if_index;
+ args.is_add = is_add;
+ args.is_static = is_static;
+ args.is_no_fib_entry = is_no_fib_entry;
+ clib_memcpy (&args.addr, a, sizeof (*a));
+ if (NULL != link_layer_address)
+ clib_memcpy (args.link_layer_address, link_layer_address, 6);
+
+ vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback,
+ (u8 *) & args, sizeof (args));
+}
+
+static void
+ip6_nbr_probe (ip_adjacency_t * adj)
+{
+ icmp6_neighbor_solicitation_header_t *h;
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_main_t *im = &ip6_main;
+ ip_interface_address_t *ia;
+ ip6_address_t *dst, *src;
+ vnet_hw_interface_t *hi;
+ vnet_sw_interface_t *si;
+ vlib_buffer_t *b;
+ int bogus_length;
+ vlib_main_t *vm;
+ u32 bi = 0;
+
+ vm = vlib_get_main ();
+
+ si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
+ dst = &adj->sub_type.nbr.next_hop.ip6;
+
+ if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
+ {
+ return;
+ }
+ src = ip6_interface_address_matching_destination (im, dst,
+ adj->rewrite_header.
+ sw_if_index, &ia);
+ if (!src)
+ {
+ return;
+ }
+
+ h = vlib_packet_template_get_packet (vm,
+ &im->discover_neighbor_packet_template,
+ &bi);
+
+ hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
+
+ h->ip.dst_address.as_u8[13] = dst->as_u8[13];
+ h->ip.dst_address.as_u8[14] = dst->as_u8[14];
+ h->ip.dst_address.as_u8[15] = dst->as_u8[15];
+ h->ip.src_address = src[0];
+ h->neighbor.target_address = dst[0];
+
+ clib_memcpy (h->link_layer_option.ethernet_address,
+ hi->hw_address, vec_len (hi->hw_address));
+
+ h->neighbor.icmp.checksum =
+ ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
+ ASSERT (bogus_length == 0);
+
+ b = vlib_get_buffer (vm, bi);
+ vnet_buffer (b)->sw_if_index[VLIB_RX] =
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index;
+
+ /* Add encapsulation string for software interface (e.g. ethernet header). */
+ vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t));
+ vlib_buffer_advance (b, -adj->rewrite_header.data_bytes);
+
+ {
+ vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
+ u32 *to_next = vlib_frame_vector_args (f);
+ to_next[0] = bi;
+ f->n_vectors = 1;
+ vlib_put_frame_to_node (vm, hi->output_node_index, f);
+ }
+}
+
+static void
+ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr)
+{
+ adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
+ ethernet_build_rewrite (vnet_get_main (),
+ nbr->key.sw_if_index,
+ adj_get_link_type (ai),
+ nbr->link_layer_address));
+}
+
+static void
+ip6_nd_mk_incomplete (adj_index_t ai)
+{
+ ip_adjacency_t *adj = adj_get (ai);
+
+ adj_nbr_update_rewrite (ai,
+ ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
+ ethernet_build_rewrite (vnet_get_main (),
+ adj->rewrite_header.
+ sw_if_index,
+ adj_get_link_type (ai),
+ VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
+}
+
+#define IP6_NBR_MK_KEY(k, sw_if_index, addr) \
+{ \
+ k.sw_if_index = sw_if_index; \
+ k.ip6_address = *addr; \
+ k.pad = 0; \
+}
+
+static ip6_neighbor_t *
+ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_neighbor_t *n = NULL;
+ ip6_neighbor_key_t k;
+ uword *p;
+
+ IP6_NBR_MK_KEY (k, sw_if_index, addr);
+
+ p = mhash_get (&nm->neighbor_index_by_key, &k);
+ if (p)
+ {
+ n = pool_elt_at_index (nm->neighbor_pool, p[0]);
+ }
+
+ return (n);
+}
+
+static adj_walk_rc_t
+ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx)
+{
+ ip6_neighbor_t *nbr = ctx;
+
+ ip6_nd_mk_complete (ai, nbr);
+
+ return (ADJ_WALK_RC_CONTINUE);
+}
+
+static adj_walk_rc_t
+ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx)
+{
+ ip6_nd_mk_incomplete (ai);
+
+ return (ADJ_WALK_RC_CONTINUE);
+}
+
+void
+ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
+{
+ ip6_neighbor_t *nbr;
+ ip_adjacency_t *adj;
+
+ adj = adj_get (ai);
+
+ nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
+
+ switch (adj->lookup_next_index)
+ {
+ case IP_LOOKUP_NEXT_ARP:
+ case IP_LOOKUP_NEXT_GLEAN:
+ if (NULL != nbr)
+ {
+ adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
+ ip6_nd_mk_complete_walk, nbr);
+ }
+ else
+ {
+ /*
+ * no matching ND entry.
+ * construct the rewrite required to for an ND packet, and stick
+ * that in the adj's pipe to smoke.
+ */
+ adj_nbr_update_rewrite (ai,
+ ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
+ ethernet_build_rewrite (vnm,
+ sw_if_index,
+ VNET_LINK_IP6,
+ VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
+
+ /*
+ * since the FIB has added this adj for a route, it makes sense it may
+ * want to forward traffic sometime soon. Let's send a speculative ND.
+ * just one. If we were to do periodically that wouldn't be bad either,
+ * but that's more code than i'm prepared to write at this time for
+ * relatively little reward.
+ */
+ ip6_nbr_probe (adj);
+ }
+ break;
+ case IP_LOOKUP_NEXT_MCAST:
+ {
+ /*
+ * Construct a partial rewrite from the known ethernet mcast dest MAC
+ */
+ u8 *rewrite;
+ u8 offset;
+
+ rewrite = ethernet_build_rewrite (vnm,
+ sw_if_index,
+ adj->ia_link,
+ ethernet_ip6_mcast_dst_addr ());
+
+ /*
+ * Complete the remaining fields of the adj's rewrite to direct the
+ * complete of the rewrite at switch time by copying in the IP
+ * dst address's bytes.
+ * Ofset is 2 bytes into the desintation address. And we write 4 bytes.
+ */
+ offset = vec_len (rewrite) - 2;
+ adj_mcast_update_rewrite (ai, rewrite, offset, 0xffffffff);
+
+ break;
+ }
+ case IP_LOOKUP_NEXT_DROP:
+ case IP_LOOKUP_NEXT_PUNT:
+ case IP_LOOKUP_NEXT_LOCAL:
+ case IP_LOOKUP_NEXT_REWRITE:
+ case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
+ case IP_LOOKUP_NEXT_MIDCHAIN:
+ case IP_LOOKUP_NEXT_ICMP_ERROR:
+ case IP_LOOKUP_N_NEXT:
+ ASSERT (0);
+ break;
+ }
+}
+
+
+static void
+ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
+{
+ fib_prefix_t pfx = {
+ .fp_len = 128,
+ .fp_proto = FIB_PROTOCOL_IP6,
+ .fp_addr.ip6 = n->key.ip6_address,
+ };
+
+ n->fib_entry_index =
+ fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
+ FIB_ENTRY_FLAG_ATTACHED,
+ DPO_PROTO_IP6, &pfx.fp_addr,
+ n->key.sw_if_index, ~0, 1, NULL,
+ FIB_ROUTE_PATH_FLAG_NONE);
+}
+
+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 is_static, int is_no_fib_entry)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_neighbor_key_t k;
+ ip6_neighbor_t *n = 0;
+ int make_new_nd_cache_entry = 1;
+ uword *p;
+ u32 next_index;
+ pending_resolution_t *pr, *mc;
+
+ if (vlib_get_thread_index ())
+ {
+ set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
+ 1 /* set new neighbor */ , is_static,
+ is_no_fib_entry);
+ return 0;
+ }
+
+ k.sw_if_index = sw_if_index;
+ k.ip6_address = a[0];
+ k.pad = 0;
+
+ p = mhash_get (&nm->neighbor_index_by_key, &k);
+ if (p)
+ {
+ n = pool_elt_at_index (nm->neighbor_pool, p[0]);
+ /* Refuse to over-write static neighbor entry. */
+ if (!is_static && (n->flags & IP6_NEIGHBOR_FLAG_STATIC))
+ return -2;
+ make_new_nd_cache_entry = 0;
+ }
+
+ if (make_new_nd_cache_entry)
+ {
+ pool_get (nm->neighbor_pool, n);
+ mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
+ /* old value */ 0);
+ n->key = k;
+ n->fib_entry_index = FIB_NODE_INDEX_INVALID;
+
+ clib_memcpy (n->link_layer_address,
+ link_layer_address, n_bytes_link_layer_address);
+
+ /*
+ * create the adj-fib. the entry in the FIB table for and to the peer.
+ */
+ if (!is_no_fib_entry)
+ {
+ ip6_neighbor_adj_fib_add (n,
+ ip6_fib_table_get_index_for_sw_if_index
+ (n->key.sw_if_index));
+ }
+ else
+ {
+ n->flags |= IP6_NEIGHBOR_FLAG_NO_FIB_ENTRY;
+ }
+ }
+ else
+ {
+ /*
+ * prevent a DoS attack from the data-plane that
+ * spams us with no-op updates to the MAC address
+ */
+ if (0 == memcmp (n->link_layer_address,
+ link_layer_address, n_bytes_link_layer_address))
+ goto check_customers;
+
+ clib_memcpy (n->link_layer_address,
+ link_layer_address, n_bytes_link_layer_address);
+ }
+
+ /* Update time stamp and flags. */
+ n->cpu_time_last_updated = clib_cpu_time_now ();
+ if (is_static)
+ n->flags |= IP6_NEIGHBOR_FLAG_STATIC;
+ else
+ n->flags |= IP6_NEIGHBOR_FLAG_DYNAMIC;
+
+ adj_nbr_walk_nh6 (sw_if_index,
+ &n->key.ip6_address, ip6_nd_mk_complete_walk, n);
+
+check_customers:
+ /* Customer(s) waiting for this address to be resolved? */
+ p = mhash_get (&nm->pending_resolutions_by_address, a);
+ if (p)
+ {
+ next_index = p[0];
+
+ while (next_index != (u32) ~ 0)
+ {
+ pr = pool_elt_at_index (nm->pending_resolutions, next_index);
+ vlib_process_signal_event (vm, pr->node_index,
+ pr->type_opaque, pr->data);
+ next_index = pr->next_index;
+ pool_put (nm->pending_resolutions, pr);
+ }
+
+ mhash_unset (&nm->pending_resolutions_by_address, a, 0);
+ }
+
+ /* Customer(s) requesting ND event for this address? */
+ p = mhash_get (&nm->mac_changes_by_address, a);
+ if (p)
+ {
+ next_index = p[0];
+
+ while (next_index != (u32) ~ 0)
+ {
+ int (*fp) (u32, u8 *, u32, ip6_address_t *);
+ int rv = 1;
+ mc = pool_elt_at_index (nm->mac_changes, next_index);
+ fp = mc->data_callback;
+
+ /* Call the user's data callback, return 1 to suppress dup events */
+ if (fp)
+ rv =
+ (*fp) (mc->data, link_layer_address, sw_if_index, &ip6a_zero);
+ /*
+ * Signal the resolver process, as long as the user
+ * says they want to be notified
+ */
+ if (rv == 0)
+ vlib_process_signal_event (vm, mc->node_index,
+ mc->type_opaque, mc->data);
+ next_index = mc->next_index;
+ }
+ }
+
+ return 0;
+}
+
+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)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_neighbor_key_t k;
+ ip6_neighbor_t *n;
+ uword *p;
+ int rv = 0;
+
+ if (vlib_get_thread_index ())
+ {
+ set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
+ 0 /* unset */ , 0, 0);
+ return 0;
+ }
+
+ k.sw_if_index = sw_if_index;
+ k.ip6_address = a[0];
+ k.pad = 0;
+
+ p = mhash_get (&nm->neighbor_index_by_key, &k);
+ if (p == 0)
+ {
+ rv = -1;
+ goto out;
+ }
+
+ n = pool_elt_at_index (nm->neighbor_pool, p[0]);
+ mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
+
+ adj_nbr_walk_nh6 (sw_if_index,
+ &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
+
+
+ if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
+ {
+ fib_prefix_t pfx = {
+ .fp_len = 128,
+ .fp_proto = FIB_PROTOCOL_IP6,
+ .fp_addr.ip6 = n->key.ip6_address,
+ };
+ fib_table_entry_path_remove
+ (ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index),
+ &pfx,
+ FIB_SOURCE_ADJ,
+ DPO_PROTO_IP6,
+ &pfx.fp_addr, n->key.sw_if_index, ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
+ }
+ pool_put (nm->neighbor_pool, n);
+
+out:
+ return rv;
+}
+
+static void ip6_neighbor_set_unset_rpc_callback
+ (ip6_neighbor_set_unset_rpc_args_t * a)
+{
+ vlib_main_t *vm = vlib_get_main ();
+ if (a->is_add)
+ vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
+ a->link_layer_address, 6, a->is_static,
+ a->is_no_fib_entry);
+ else
+ vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr,
+ a->link_layer_address, 6);
+}
+
+static int
+ip6_neighbor_sort (void *a1, void *a2)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_neighbor_t *n1 = a1, *n2 = a2;
+ int cmp;
+ cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index,
+ n2->key.sw_if_index);
+ if (!cmp)
+ cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address);
+ return cmp;
+}
+
+ip6_neighbor_t *
+ip6_neighbors_entries (u32 sw_if_index)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_neighbor_t *n, *ns = 0;
+
+ /* *INDENT-OFF* */
+ pool_foreach (n, nm->neighbor_pool,
+ ({
+ if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index)
+ continue;
+ vec_add1 (ns, n[0]);
+ }));
+ /* *INDENT-ON* */
+
+ if (ns)
+ vec_sort_with_function (ns, ip6_neighbor_sort);
+ return ns;
+}
+
+static clib_error_t *
+show_ip6_neighbors (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_neighbor_t *n, *ns;
+ clib_error_t *error = 0;
+ u32 sw_if_index;
+
+ /* Filter entries by interface if given. */
+ sw_if_index = ~0;
+ (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
+
+ ns = ip6_neighbors_entries (sw_if_index);
+ if (ns)
+ {
+ vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0);
+ vec_foreach (n, ns)
+ {
+ vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n);
+ }
+ vec_free (ns);
+ }
+
+ return error;
+}
+
+/*?
+ * This command is used to display the adjacent IPv6 hosts found via
+ * neighbor discovery. Optionally, limit the output to the specified
+ * interface.
+ *
+ * @cliexpar
+ * Example of how to display the IPv6 neighbor adjacency table:
+ * @cliexstart{show ip6 neighbors}
+ * Time Address Flags Link layer Interface
+ * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
+ * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
+ * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0
+ * @cliexend
+ * Example of how to display the IPv6 neighbor adjacency table for given interface:
+ * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0}
+ * Time Address Flags Link layer Interface
+ * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0
+ * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0
+ * @cliexend
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = {
+ .path = "show ip6 neighbors",
+ .function = show_ip6_neighbors,
+ .short_help = "show ip6 neighbors [<interface>]",
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+set_ip6_neighbor (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_address_t addr;
+ u8 mac_address[6];
+ int addr_valid = 0;
+ int is_del = 0;
+ int is_static = 0;
+ int is_no_fib_entry = 0;
+ u32 sw_if_index;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ /* intfc, ip6-address, mac-address */
+ if (unformat (input, "%U %U %U",
+ unformat_vnet_sw_interface, vnm, &sw_if_index,
+ unformat_ip6_address, &addr,
+ unformat_ethernet_address, mac_address))
+ addr_valid = 1;
+
+ else if (unformat (input, "delete") || unformat (input, "del"))
+ is_del = 1;
+ else if (unformat (input, "static"))
+ is_static = 1;
+ else if (unformat (input, "no-fib-entry"))
+ is_no_fib_entry = 1;
+ else
+ break;
+ }
+
+ if (!addr_valid)
+ return clib_error_return (0, "Missing interface, ip6 or hw address");
+
+ if (!is_del)
+ vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
+ mac_address, sizeof (mac_address),
+ is_static, is_no_fib_entry);
+ else
+ vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr,
+ mac_address, sizeof (mac_address));
+ return 0;
+}
+
+/*?
+ * This command is used to manually add an entry to the IPv6 neighbor
+ * adjacency table. Optionally, the entry can be added as static. It is
+ * also used to remove an entry from the table. Use the '<em>show ip6
+ * neighbors</em>' command to display all learned and manually entered entries.
+ *
+ * @cliexpar
+ * Example of how to add a static entry to the IPv6 neighbor adjacency table:
+ * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
+ * Example of how to delete an entry from the IPv6 neighbor adjacency table:
+ * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
+{
+ .path = "set ip6 neighbor",
+ .function = set_ip6_neighbor,
+ .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
+};
+/* *INDENT-ON* */
+
+typedef enum
+{
+ ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
+ ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
+ ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
+} icmp6_neighbor_solicitation_or_advertisement_next_t;
+
+static_always_inline uword
+icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ uword is_solicitation)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_main_t *im = &ip6_main;
+ uword n_packets = frame->n_vectors;
+ u32 *from, *to_next;
+ u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
+ icmp6_neighbor_discovery_option_type_t option_type;
+ vlib_node_runtime_t *error_node =
+ vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
+ int bogus_length;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = n_packets;
+ next_index = node->cached_next_index;
+
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
+ /* stride */ 1,
+ sizeof (icmp6_input_trace_t));
+
+ option_type =
+ (is_solicitation
+ ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
+ : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
+ n_advertisements_sent = 0;
+
+ while (n_left_from > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ vlib_buffer_t *p0;
+ ip6_header_t *ip0;
+ icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
+ icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
+ u32 bi0, options_len0, sw_if_index0, next0, error0;
+ u32 ip6_sadd_link_local, ip6_sadd_unspecified;
+ int is_rewrite0;
+ u32 ni0;
+
+ bi0 = to_next[0] = from[0];
+
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ p0 = vlib_get_buffer (vm, bi0);
+ ip0 = vlib_buffer_get_current (p0);
+ h0 = ip6_next_header (ip0);
+ options_len0 =
+ clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
+
+ error0 = ICMP6_ERROR_NONE;
+ sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+ ip6_sadd_link_local =
+ ip6_address_is_link_local_unicast (&ip0->src_address);
+ ip6_sadd_unspecified =
+ ip6_address_is_unspecified (&ip0->src_address);
+
+ /* Check that source address is unspecified, link-local or else on-link. */
+ if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
+ {
+ u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
+
+ if (ADJ_INDEX_INVALID != src_adj_index0)
+ {
+ ip_adjacency_t *adj0 = adj_get (src_adj_index0);
+
+ /* Allow all realistic-looking rewrite adjacencies to pass */
+ ni0 = adj0->lookup_next_index;
+ is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
+ (ni0 < IP6_LOOKUP_N_NEXT);
+
+ error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
+ || !is_rewrite0)
+ ?
+ ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
+ : error0);
+ }
+ else
+ {
+ error0 =
+ ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
+ }
+ }
+
+ o0 = (void *) (h0 + 1);
+ o0 = ((options_len0 == 8 && o0->header.type == option_type
+ && o0->header.n_data_u64s == 1) ? o0 : 0);
+
+ /* If src address unspecified or link local, donot learn neighbor MAC */
+ if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
+ !ip6_sadd_unspecified))
+ {
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ if (nm->limit_neighbor_cache_size &&
+ pool_elts (nm->neighbor_pool) >=
+ nm->limit_neighbor_cache_size)
+ unset_random_neighbor_entry ();
+ vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
+ is_solicitation ?
+ &ip0->src_address :
+ &h0->target_address,
+ o0->ethernet_address,
+ sizeof (o0->ethernet_address),
+ 0, ip6_sadd_link_local);
+ }
+
+ if (is_solicitation && error0 == ICMP6_ERROR_NONE)
+ {
+ /* Check that target address is local to this router. */
+ fib_node_index_t fei;
+ u32 fib_index;
+
+ fib_index =
+ ip6_fib_table_get_index_for_sw_if_index (sw_if_index0);
+
+ if (~0 == fib_index)
+ {
+ error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
+ }
+ else
+ {
+ fei = ip6_fib_table_lookup_exact_match (fib_index,
+ &h0->target_address,
+ 128);
+
+ if (FIB_NODE_INDEX_INVALID == fei)
+ {
+ /* The target address is not in the FIB */
+ error0 =
+ ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
+ }
+ else
+ {
+ if (FIB_ENTRY_FLAG_LOCAL &
+ fib_entry_get_flags_for_source (fei,
+ FIB_SOURCE_INTERFACE))
+ {
+ /* It's an address that belongs to one of our interfaces
+ * that's good. */
+ }
+ else
+ if (fib_entry_is_sourced
+ (fei, FIB_SOURCE_IP6_ND_PROXY))
+ {
+ /* The address was added by IPv6 Proxy ND config.
+ * We should only respond to these if the NS arrived on
+ * the link that has a matching covering prefix */
+ }
+ else
+ {
+ error0 =
+ ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
+ }
+ }
+ }
+ }
+
+ if (is_solicitation)
+ next0 = (error0 != ICMP6_ERROR_NONE
+ ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
+ : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
+ else
+ {
+ next0 = 0;
+ error0 = error0 == ICMP6_ERROR_NONE ?
+ ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
+ }
+
+ if (is_solicitation && error0 == ICMP6_ERROR_NONE)
+ {
+ vnet_sw_interface_t *sw_if0;
+ ethernet_interface_t *eth_if0;
+ ethernet_header_t *eth0;
+
+ /* dst address is either source address or the all-nodes mcast addr */
+ if (!ip6_sadd_unspecified)
+ ip0->dst_address = ip0->src_address;
+ else
+ ip6_set_reserved_multicast_address (&ip0->dst_address,
+ IP6_MULTICAST_SCOPE_link_local,
+ IP6_MULTICAST_GROUP_ID_all_hosts);
+
+ ip0->src_address = h0->target_address;
+ ip0->hop_limit = 255;
+ h0->icmp.type = ICMP6_neighbor_advertisement;
+
+ sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
+ ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
+ eth_if0 =
+ ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
+ if (eth_if0 && o0)
+ {
+ clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
+ o0->header.type =
+ ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
+ }
+
+ h0->advertisement_flags = clib_host_to_net_u32
+ (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
+ | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
+
+ h0->icmp.checksum = 0;
+ h0->icmp.checksum =
+ ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
+ &bogus_length);
+ ASSERT (bogus_length == 0);
+
+ /* Reuse current MAC header, copy SMAC to DMAC and
+ * interface MAC to SMAC */
+ vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
+ eth0 = vlib_buffer_get_current (p0);
+ clib_memcpy (eth0->dst_address, eth0->src_address, 6);
+ if (eth_if0)
+ clib_memcpy (eth0->src_address, eth_if0->address, 6);
+
+ /* Setup input and output sw_if_index for packet */
+ ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
+ vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
+ vnet_buffer (p0)->sw_if_index[VLIB_RX] =
+ vnet_main.local_interface_sw_if_index;
+
+ n_advertisements_sent++;
+ }
+
+ p0->error = error_node->errors[error0];
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ /* Account for advertisements sent. */
+ vlib_error_count (vm, error_node->node_index,
+ ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
+ n_advertisements_sent);
+
+ return frame->n_vectors;
+}
+
+/* for "syslogging" - use elog for now */
+#define foreach_log_level \
+ _ (DEBUG, "DEBUG") \
+ _ (INFO, "INFORMATION") \
+ _ (NOTICE, "NOTICE") \
+ _ (WARNING, "WARNING") \
+ _ (ERR, "ERROR") \
+ _ (CRIT, "CRITICAL") \
+ _ (ALERT, "ALERT") \
+ _ (EMERG, "EMERGENCY")
+
+typedef enum
+{
+#define _(f,s) LOG_##f,
+ foreach_log_level
+#undef _
+} log_level_t;
+
+static char *log_level_strings[] = {
+#define _(f,s) s,
+ foreach_log_level
+#undef _
+};
+
+static int logmask = 1 << LOG_DEBUG;
+
+static void
+ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
+{
+ /* just use elog for now */
+ u8 *what;
+ va_list va;
+
+ if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
+ return;
+
+ va_start (va, fmt);
+ if (fmt)
+ {
+ what = va_format (0, fmt, &va);
+
+ ELOG_TYPE_DECLARE (e) =
+ {
+ .format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
+ struct
+ {
+ u32 s[2];
+ } *ed;
+ ed = ELOG_DATA (&vm->elog_main, e);
+ ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
+ ed->s[1] = elog_string (&vm->elog_main, (char *) what);
+ }
+ va_end (va);
+ return;
+}
+
+/* ipv6 neighbor discovery - router advertisements */
+typedef enum
+{
+ ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
+ ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
+ ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
+ ICMP6_ROUTER_SOLICITATION_N_NEXT,
+} icmp6_router_solicitation_or_advertisement_next_t;
+
+static_always_inline uword
+icmp6_router_solicitation (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_main_t *im = &ip6_main;
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ uword n_packets = frame->n_vectors;
+ u32 *from, *to_next;
+ u32 n_left_from, n_left_to_next, next_index;
+ u32 n_advertisements_sent = 0;
+ int bogus_length;
+
+ icmp6_neighbor_discovery_option_type_t option_type;
+
+ vlib_node_runtime_t *error_node =
+ vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = n_packets;
+ next_index = node->cached_next_index;
+
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
+ /* stride */ 1,
+ sizeof (icmp6_input_trace_t));
+
+ /* source may append his LL address */
+ option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
+
+ while (n_left_from > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ vlib_buffer_t *p0;
+ ip6_header_t *ip0;
+ ip6_radv_t *radv_info = 0;
+
+ icmp6_neighbor_discovery_header_t *h0;
+ icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
+
+ u32 bi0, options_len0, sw_if_index0, next0, error0;
+ u32 is_solicitation = 1, is_dropped = 0;
+ u32 is_unspecified, is_link_local;
+
+ bi0 = to_next[0] = from[0];
+
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ p0 = vlib_get_buffer (vm, bi0);
+ ip0 = vlib_buffer_get_current (p0);
+ h0 = ip6_next_header (ip0);
+ options_len0 =
+ clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
+ is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
+ is_link_local =
+ ip6_address_is_link_local_unicast (&ip0->src_address);
+
+ error0 = ICMP6_ERROR_NONE;
+ sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+
+ /* check if solicitation (not from nd_timer node) */
+ if (ip6_address_is_unspecified (&ip0->dst_address))
+ is_solicitation = 0;
+
+ /* Check that source address is unspecified, link-local or else on-link. */
+ if (!is_unspecified && !is_link_local)
+ {
+ u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
+
+ if (ADJ_INDEX_INVALID != src_adj_index0)
+ {
+ ip_adjacency_t *adj0 = adj_get (src_adj_index0);
+
+ error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
+ ?
+ ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
+ : error0);
+ }
+ else
+ {
+ error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
+ }
+ }
+
+ /* check for source LL option and process */
+ o0 = (void *) (h0 + 1);
+ o0 = ((options_len0 == 8
+ && o0->header.type == option_type
+ && o0->header.n_data_u64s == 1) ? o0 : 0);
+
+ /* if src address unspecified IGNORE any options */
+ if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
+ !is_unspecified && !is_link_local))
+ {
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ if (nm->limit_neighbor_cache_size &&
+ pool_elts (nm->neighbor_pool) >=
+ nm->limit_neighbor_cache_size)
+ unset_random_neighbor_entry ();
+
+ vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
+ &ip0->src_address,
+ o0->ethernet_address,
+ sizeof (o0->ethernet_address),
+ 0, 0);
+ }
+
+ /* default is to drop */
+ next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
+
+ if (error0 == ICMP6_ERROR_NONE)
+ {
+ vnet_sw_interface_t *sw_if0;
+ ethernet_interface_t *eth_if0;
+ u32 adj_index0;
+
+ sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
+ ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
+ eth_if0 =
+ ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
+
+ /* only support ethernet interface type for now */
+ error0 =
+ (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
+ : error0;
+
+ if (error0 == ICMP6_ERROR_NONE)
+ {
+ u32 ri;
+
+ /* adjust the sizeof the buffer to just include the ipv6 header */
+ p0->current_length -=
+ (options_len0 +
+ sizeof (icmp6_neighbor_discovery_header_t));
+
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty
+ (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
+
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
+
+ if (ri != ~0)
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+
+ error0 =
+ ((!radv_info) ?
+ ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
+ error0);
+
+ if (error0 == ICMP6_ERROR_NONE)
+ {
+ f64 now = vlib_time_now (vm);
+
+ /* for solicited adverts - need to rate limit */
+ if (is_solicitation)
+ {
+ if (0 != radv_info->last_radv_time &&
+ (now - radv_info->last_radv_time) <
+ MIN_DELAY_BETWEEN_RAS)
+ is_dropped = 1;
+ else
+ radv_info->last_radv_time = now;
+ }
+
+ /* send now */
+ icmp6_router_advertisement_header_t rh;
+
+ rh.icmp.type = ICMP6_router_advertisement;
+ rh.icmp.code = 0;
+ rh.icmp.checksum = 0;
+
+ rh.current_hop_limit = radv_info->curr_hop_limit;
+ rh.router_lifetime_in_sec =
+ clib_host_to_net_u16
+ (radv_info->adv_router_lifetime_in_sec);
+ rh.
+ time_in_msec_between_retransmitted_neighbor_solicitations
+ =
+ clib_host_to_net_u32 (radv_info->
+ adv_time_in_msec_between_retransmitted_neighbor_solicitations);
+ rh.neighbor_reachable_time_in_msec =
+ clib_host_to_net_u32 (radv_info->
+ adv_neighbor_reachable_time_in_msec);
+
+ rh.flags =
+ (radv_info->adv_managed_flag) ?
+ ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
+ 0;
+ rh.flags |=
+ ((radv_info->adv_other_flag) ?
+ ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
+ 0);
+
+
+ u16 payload_length =
+ sizeof (icmp6_router_advertisement_header_t);
+
+ vlib_buffer_add_data (vm,
+ vlib_buffer_get_free_list_index
+ (p0), bi0, (void *) &rh,
+ sizeof
+ (icmp6_router_advertisement_header_t));
+
+ if (radv_info->adv_link_layer_address)
+ {
+ icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
+ h;
+
+ h.header.type =
+ ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
+ h.header.n_data_u64s = 1;
+
+ /* copy ll address */
+ clib_memcpy (&h.ethernet_address[0],
+ eth_if0->address, 6);
+
+ vlib_buffer_add_data (vm,
+ vlib_buffer_get_free_list_index
+ (p0), bi0, (void *) &h,
+ sizeof
+ (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t));
+
+ payload_length +=
+ sizeof
+ (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t);
+ }
+
+ /* add MTU option */
+ if (radv_info->adv_link_mtu)
+ {
+ icmp6_neighbor_discovery_mtu_option_t h;
+
+ h.unused = 0;
+ h.mtu =
+ clib_host_to_net_u32 (radv_info->adv_link_mtu);
+ h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu;
+ h.header.n_data_u64s = 1;
+
+ payload_length +=
+ sizeof (icmp6_neighbor_discovery_mtu_option_t);
+
+ vlib_buffer_add_data (vm,
+ vlib_buffer_get_free_list_index
+ (p0), bi0, (void *) &h,
+ sizeof
+ (icmp6_neighbor_discovery_mtu_option_t));
+ }
+
+ /* add advertised prefix options */
+ ip6_radv_prefix_t *pr_info;
+
+ /* *INDENT-OFF* */
+ pool_foreach (pr_info, radv_info->adv_prefixes_pool,
+ ({
+ if(pr_info->enabled &&
+ (!pr_info->decrement_lifetime_flag
+ || (pr_info->pref_lifetime_expires >0)))
+ {
+ /* advertise this prefix */
+ icmp6_neighbor_discovery_prefix_information_option_t h;
+
+ h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information;
+ h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3);
+
+ h.dst_address_length = pr_info->prefix_len;
+
+ h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0;
+ h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0;
+
+ if(radv_info->cease_radv && pr_info->deprecated_prefix_flag)
+ {
+ h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME);
+ h.preferred_time = 0;
+ }
+ else
+ {
+ if(pr_info->decrement_lifetime_flag)
+ {
+ pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ?
+ (pr_info->valid_lifetime_expires - now) : 0;
+
+ pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ?
+ (pr_info->pref_lifetime_expires - now) : 0;
+ }
+
+ h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs);
+ h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ;
+ }
+ h.unused = 0;
+
+ clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
+
+ payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
+
+ vlib_buffer_add_data (vm,
+ vlib_buffer_get_free_list_index (p0),
+ bi0,
+ (void *)&h, sizeof(icmp6_neighbor_discovery_prefix_information_option_t));
+
+ }
+ }));
+ /* *INDENT-ON* */
+
+ /* add additional options before here */
+
+ /* finish building the router advertisement... */
+ if (!is_unspecified && radv_info->send_unicast)
+ {
+ ip0->dst_address = ip0->src_address;
+ }
+ else
+ {
+ /* target address is all-nodes mcast addr */
+ ip6_set_reserved_multicast_address
+ (&ip0->dst_address,
+ IP6_MULTICAST_SCOPE_link_local,
+ IP6_MULTICAST_GROUP_ID_all_hosts);
+ }
+
+ /* source address MUST be the link-local address */
+ ip0->src_address = radv_info->link_local_address;
+
+ ip0->hop_limit = 255;
+ ip0->payload_length =
+ clib_host_to_net_u16 (payload_length);
+
+ icmp6_router_advertisement_header_t *rh0 =
+ (icmp6_router_advertisement_header_t *) (ip0 + 1);
+ rh0->icmp.checksum =
+ ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
+ &bogus_length);
+ ASSERT (bogus_length == 0);
+
+ /* setup output if and adjacency */
+ vnet_buffer (p0)->sw_if_index[VLIB_RX] =
+ vnet_main.local_interface_sw_if_index;
+
+ if (is_solicitation)
+ {
+ ethernet_header_t *eth0;
+ /* Reuse current MAC header, copy SMAC to DMAC and
+ * interface MAC to SMAC */
+ vlib_buffer_reset (p0);
+ eth0 = vlib_buffer_get_current (p0);
+ clib_memcpy (eth0->dst_address, eth0->src_address,
+ 6);
+ clib_memcpy (eth0->src_address, eth_if0->address,
+ 6);
+ next0 =
+ is_dropped ? next0 :
+ ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
+ vnet_buffer (p0)->sw_if_index[VLIB_TX] =
+ sw_if_index0;
+ }
+ else
+ {
+ adj_index0 = radv_info->mcast_adj_index;
+ if (adj_index0 == 0)
+ error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
+ else
+ {
+ next0 =
+ is_dropped ? next0 :
+ ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
+ vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
+ adj_index0;
+ }
+ }
+ p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
+
+ radv_info->n_solicitations_dropped += is_dropped;
+ radv_info->n_solicitations_rcvd += is_solicitation;
+
+ if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
+ {
+ radv_info->n_advertisements_sent++;
+ n_advertisements_sent++;
+ }
+ }
+ }
+ }
+
+ p0->error = error_node->errors[error0];
+
+ if (error0 != ICMP6_ERROR_NONE)
+ vlib_error_count (vm, error_node->node_index, error0, 1);
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ /* Account for router advertisements sent. */
+ vlib_error_count (vm, error_node->node_index,
+ ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
+ n_advertisements_sent);
+
+ return frame->n_vectors;
+}
+
+ /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
+static_always_inline uword
+icmp6_router_advertisement (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ uword n_packets = frame->n_vectors;
+ u32 *from, *to_next;
+ u32 n_left_from, n_left_to_next, next_index;
+ u32 n_advertisements_rcvd = 0;
+
+ vlib_node_runtime_t *error_node =
+ vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = n_packets;
+ next_index = node->cached_next_index;
+
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
+ /* stride */ 1,
+ sizeof (icmp6_input_trace_t));
+
+ while (n_left_from > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ vlib_buffer_t *p0;
+ ip6_header_t *ip0;
+ ip6_radv_t *radv_info = 0;
+ icmp6_router_advertisement_header_t *h0;
+ u32 bi0, options_len0, sw_if_index0, next0, error0;
+
+ bi0 = to_next[0] = from[0];
+
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ p0 = vlib_get_buffer (vm, bi0);
+ ip0 = vlib_buffer_get_current (p0);
+ h0 = ip6_next_header (ip0);
+ options_len0 =
+ clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
+
+ error0 = ICMP6_ERROR_NONE;
+ sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+
+ /* Check that source address is link-local */
+ error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
+ ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
+
+ /* default is to drop */
+ next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
+
+ n_advertisements_rcvd++;
+
+ if (error0 == ICMP6_ERROR_NONE)
+ {
+ vnet_sw_interface_t *sw_if0;
+ ethernet_interface_t *eth_if0;
+
+ sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
+ ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
+ eth_if0 =
+ ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
+
+ /* only support ethernet interface type for now */
+ error0 =
+ (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
+ : error0;
+
+ if (error0 == ICMP6_ERROR_NONE)
+ {
+ u32 ri;
+
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty
+ (nm->if_radv_pool_index_by_sw_if_index, sw_if_index0, ~0);
+
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
+
+ if (ri != ~0)
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+
+ error0 =
+ ((!radv_info) ?
+ ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
+ error0);
+
+ if (error0 == ICMP6_ERROR_NONE)
+ {
+ /* validate advertised information */
+ if ((h0->current_hop_limit && radv_info->curr_hop_limit)
+ && (h0->current_hop_limit !=
+ radv_info->curr_hop_limit))
+ {
+ ip6_neighbor_syslog (vm, LOG_WARNING,
+ "our AdvCurHopLimit on %U doesn't agree with %U",
+ format_vnet_sw_if_index_name,
+ vnm, sw_if_index0,
+ format_ip6_address,
+ &ip0->src_address);
+ }
+
+ if ((h0->flags &
+ ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP)
+ != radv_info->adv_managed_flag)
+ {
+ ip6_neighbor_syslog (vm, LOG_WARNING,
+ "our AdvManagedFlag on %U doesn't agree with %U",
+ format_vnet_sw_if_index_name,
+ vnm, sw_if_index0,
+ format_ip6_address,
+ &ip0->src_address);
+ }
+
+ if ((h0->flags &
+ ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP)
+ != radv_info->adv_other_flag)
+ {
+ ip6_neighbor_syslog (vm, LOG_WARNING,
+ "our AdvOtherConfigFlag on %U doesn't agree with %U",
+ format_vnet_sw_if_index_name,
+ vnm, sw_if_index0,
+ format_ip6_address,
+ &ip0->src_address);
+ }
+
+ if ((h0->
+ time_in_msec_between_retransmitted_neighbor_solicitations
+ && radv_info->
+ adv_time_in_msec_between_retransmitted_neighbor_solicitations)
+ && (h0->
+ time_in_msec_between_retransmitted_neighbor_solicitations
+ !=
+ clib_host_to_net_u32 (radv_info->
+ adv_time_in_msec_between_retransmitted_neighbor_solicitations)))
+ {
+ ip6_neighbor_syslog (vm, LOG_WARNING,
+ "our AdvRetransTimer on %U doesn't agree with %U",
+ format_vnet_sw_if_index_name,
+ vnm, sw_if_index0,
+ format_ip6_address,
+ &ip0->src_address);
+ }
+
+ if ((h0->neighbor_reachable_time_in_msec &&
+ radv_info->adv_neighbor_reachable_time_in_msec) &&
+ (h0->neighbor_reachable_time_in_msec !=
+ clib_host_to_net_u32
+ (radv_info->adv_neighbor_reachable_time_in_msec)))
+ {
+ ip6_neighbor_syslog (vm, LOG_WARNING,
+ "our AdvReachableTime on %U doesn't agree with %U",
+ format_vnet_sw_if_index_name,
+ vnm, sw_if_index0,
+ format_ip6_address,
+ &ip0->src_address);
+ }
+
+ /* check for MTU or prefix options or .. */
+ u8 *opt_hdr = (u8 *) (h0 + 1);
+ while (options_len0 > 0)
+ {
+ icmp6_neighbor_discovery_option_header_t *o0 =
+ (icmp6_neighbor_discovery_option_header_t *)
+ opt_hdr;
+ int opt_len = o0->n_data_u64s << 3;
+ icmp6_neighbor_discovery_option_type_t option_type =
+ o0->type;
+
+ if (options_len0 < 2)
+ {
+ ip6_neighbor_syslog (vm, LOG_ERR,
+ "malformed RA packet on %U from %U",
+ format_vnet_sw_if_index_name,
+ vnm, sw_if_index0,
+ format_ip6_address,
+ &ip0->src_address);
+ break;
+ }
+
+ if (opt_len == 0)
+ {
+ ip6_neighbor_syslog (vm, LOG_ERR,
+ " zero length option in RA on %U from %U",
+ format_vnet_sw_if_index_name,
+ vnm, sw_if_index0,
+ format_ip6_address,
+ &ip0->src_address);
+ break;
+ }
+ else if (opt_len > options_len0)
+ {
+ ip6_neighbor_syslog (vm, LOG_ERR,
+ "option length in RA packet greater than total length on %U from %U",
+ format_vnet_sw_if_index_name,
+ vnm, sw_if_index0,
+ format_ip6_address,
+ &ip0->src_address);
+ break;
+ }
+
+ options_len0 -= opt_len;
+ opt_hdr += opt_len;
+
+ switch (option_type)
+ {
+ case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu:
+ {
+ icmp6_neighbor_discovery_mtu_option_t *h =
+ (icmp6_neighbor_discovery_mtu_option_t
+ *) (o0);
+
+ if (opt_len < sizeof (*h))
+ break;
+
+ if ((h->mtu && radv_info->adv_link_mtu) &&
+ (h->mtu !=
+ clib_host_to_net_u32
+ (radv_info->adv_link_mtu)))
+ {
+ ip6_neighbor_syslog (vm, LOG_WARNING,
+ "our AdvLinkMTU on %U doesn't agree with %U",
+ format_vnet_sw_if_index_name,
+ vnm, sw_if_index0,
+ format_ip6_address,
+ &ip0->src_address);
+ }
+ }
+ break;
+
+ case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information:
+ {
+ icmp6_neighbor_discovery_prefix_information_option_t
+ * h =
+ (icmp6_neighbor_discovery_prefix_information_option_t
+ *) (o0);
+
+ /* validate advertised prefix options */
+ ip6_radv_prefix_t *pr_info;
+ u32 preferred, valid;
+
+ if (opt_len < sizeof (*h))
+ break;
+
+ preferred =
+ clib_net_to_host_u32 (h->preferred_time);
+ valid = clib_net_to_host_u32 (h->valid_time);
+
+ /* look for matching prefix - if we our advertising it, it better be consistant */
+ /* *INDENT-OFF* */
+ pool_foreach (pr_info, radv_info->adv_prefixes_pool,
+ ({
+
+ ip6_address_t mask;
+ ip6_address_mask_from_width(&mask, pr_info->prefix_len);
+
+ if(pr_info->enabled &&
+ (pr_info->prefix_len == h->dst_address_length) &&
+ ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask))
+ {
+ /* found it */
+ if(!pr_info->decrement_lifetime_flag &&
+ valid != pr_info->adv_valid_lifetime_in_secs)
+ {
+ ip6_neighbor_syslog(vm, LOG_WARNING,
+ "our ADV validlifetime on %U for %U does not agree with %U",
+ format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
+ format_ip6_address, &h->dst_address);
+ }
+ if(!pr_info->decrement_lifetime_flag &&
+ preferred != pr_info->adv_pref_lifetime_in_secs)
+ {
+ ip6_neighbor_syslog(vm, LOG_WARNING,
+ "our ADV preferredlifetime on %U for %U does not agree with %U",
+ format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix,
+ format_ip6_address, &h->dst_address);
+ }
+ }
+ break;
+ }));
+ /* *INDENT-ON* */
+ break;
+ }
+ default:
+ /* skip this one */
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ p0->error = error_node->errors[error0];
+
+ if (error0 != ICMP6_ERROR_NONE)
+ vlib_error_count (vm, error_node->node_index, error0, 1);
+
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ /* Account for router advertisements sent. */
+ vlib_error_count (vm, error_node->node_index,
+ ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
+ n_advertisements_rcvd);
+
+ return frame->n_vectors;
+}
+
+/**
+ * @brief Add a multicast Address to the advertised MLD set
+ */
+static void
+ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
+{
+ ip6_mldp_group_t *mcast_group_info;
+ uword *p;
+
+ /* lookup mldp info for this interface */
+ p = mhash_get (&radv_info->address_to_mldp_index, &addr);
+ mcast_group_info =
+ p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
+
+ /* add address */
+ if (!mcast_group_info)
+ {
+ /* add */
+ u32 mi;
+ pool_get (radv_info->mldp_group_pool, mcast_group_info);
+
+ mi = mcast_group_info - radv_info->mldp_group_pool;
+ mhash_set (&radv_info->address_to_mldp_index, &addr, mi, /* old_value */
+ 0);
+
+ mcast_group_info->type = 4;
+ mcast_group_info->mcast_source_address_pool = 0;
+ mcast_group_info->num_sources = 0;
+ clib_memcpy (&mcast_group_info->mcast_address, &addr,
+ sizeof (ip6_address_t));
+ }
+}
+
+/**
+ * @brief Delete a multicast Address from the advertised MLD set
+ */
+static void
+ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
+{
+ ip6_mldp_group_t *mcast_group_info;
+ uword *p;
+
+ p = mhash_get (&radv_info->address_to_mldp_index, &addr);
+ mcast_group_info =
+ p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
+
+ if (mcast_group_info)
+ {
+ mhash_unset (&radv_info->address_to_mldp_index, &addr,
+ /* old_value */ 0);
+ pool_put (radv_info->mldp_group_pool, mcast_group_info);
+ }
+}
+
+/**
+ * @brief Add a multicast Address to the advertised MLD set
+ */
+static void
+ip6_neighbor_add_mld_grp (ip6_radv_t * a,
+ ip6_multicast_address_scope_t scope,
+ ip6_multicast_link_local_group_id_t group)
+{
+ ip6_address_t addr;
+
+ ip6_set_reserved_multicast_address (&addr, scope, group);
+
+ ip6_neighbor_add_mld_prefix (a, &addr);
+}
+
+/**
+ * @brief create and initialize router advertisement parameters with default
+ * values for this intfc
+ */
+u32
+ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
+ u32 sw_if_index, u32 is_add)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_radv_t *a = 0;
+ u32 ri = ~0;
+ vnet_sw_interface_t *sw_if0;
+ ethernet_interface_t *eth_if0 = 0;
+
+ /* lookup radv container - ethernet interfaces only */
+ sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
+ if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
+ eth_if0 = ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
+
+ if (!eth_if0)
+ return ri;
+
+ vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
+ ~0);
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+ if (ri != ~0)
+ {
+ a = pool_elt_at_index (nm->if_radv_pool, ri);
+
+ if (!is_add)
+ {
+ ip6_radv_prefix_t *p;
+ ip6_mldp_group_t *m;
+
+ /* release the lock on the interface's mcast adj */
+ adj_unlock (a->mcast_adj_index);
+
+ /* clean up prefix and MDP pools */
+ /* *INDENT-OFF* */
+ pool_flush(p, a->adv_prefixes_pool,
+ ({
+ mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
+ }));
+ pool_flush (m, a->mldp_group_pool,
+ ({
+ mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
+ }));
+ /* *INDENT-ON* */
+
+ pool_free (a->mldp_group_pool);
+ pool_free (a->adv_prefixes_pool);
+
+ mhash_free (&a->address_to_prefix_index);
+ mhash_free (&a->address_to_mldp_index);
+
+ pool_put (nm->if_radv_pool, a);
+ nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0;
+ ri = ~0;
+ }
+ }
+ else
+ {
+ if (is_add)
+ {
+ vnet_hw_interface_t *hw_if0;
+
+ hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index);
+
+ pool_get (nm->if_radv_pool, a);
+
+ ri = a - nm->if_radv_pool;
+ nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri;
+
+ /* initialize default values (most of which are zero) */
+ memset (a, 0, sizeof (a[0]));
+
+ a->sw_if_index = sw_if_index;
+ a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
+ a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
+ a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
+ a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
+
+ /* send ll address source address option */
+ a->adv_link_layer_address = 1;
+
+ a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
+ a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
+ a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
+ a->seed = (u32) clib_cpu_time_now ();
+ (void) random_u32 (&a->seed);
+ a->randomizer = clib_cpu_time_now ();
+ (void) random_u64 (&a->randomizer);
+
+ a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
+ a->initial_adverts_sent = a->initial_adverts_count - 1;
+ a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
+
+ /* deafult is to send */
+ a->send_radv = 1;
+
+ /* fill in radv_info for this interface that will be needed later */
+ a->adv_link_mtu = hw_if0->max_l3_packet_bytes[VLIB_RX];
+
+ clib_memcpy (a->link_layer_address, eth_if0->address, 6);
+
+ /* fill in default link-local address (this may be overridden) */
+ ip6_link_local_address_from_ethernet_address
+ (&a->link_local_address, eth_if0->address);
+
+ mhash_init (&a->address_to_prefix_index, sizeof (uword),
+ sizeof (ip6_address_t));
+ mhash_init (&a->address_to_mldp_index, sizeof (uword),
+ sizeof (ip6_address_t));
+
+ a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
+ VNET_LINK_IP6,
+ sw_if_index);
+
+ /* add multicast groups we will always be reporting */
+ ip6_neighbor_add_mld_grp (a,
+ IP6_MULTICAST_SCOPE_link_local,
+ IP6_MULTICAST_GROUP_ID_all_hosts);
+ ip6_neighbor_add_mld_grp (a,
+ IP6_MULTICAST_SCOPE_link_local,
+ IP6_MULTICAST_GROUP_ID_all_routers);
+ ip6_neighbor_add_mld_grp (a,
+ IP6_MULTICAST_SCOPE_link_local,
+ IP6_MULTICAST_GROUP_ID_mldv2_routers);
+ }
+ }
+ return ri;
+}
+
+/* send an mldpv2 report */
+static void
+ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ vlib_main_t *vm = vnm->vlib_main;
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ vnet_sw_interface_t *sw_if0;
+ ethernet_interface_t *eth_if0;
+ u32 ri;
+ int bogus_length;
+
+ ip6_radv_t *radv_info;
+ u16 payload_length;
+ vlib_buffer_t *b0;
+ ip6_header_t *ip0;
+ u32 *to_next;
+ vlib_frame_t *f;
+ u32 bo0;
+ u32 n_to_alloc = 1;
+ u32 n_allocated;
+
+ icmp6_multicast_listener_report_header_t *rh0;
+ icmp6_multicast_listener_report_packet_t *rp0;
+
+ sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
+ ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
+ eth_if0 = ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
+
+ if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
+ return;
+
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
+ ~0);
+
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+ if (ri == ~0)
+ return;
+
+ /* send report now - build a mldpv2 report packet */
+ n_allocated = vlib_buffer_alloc_from_free_list (vm,
+ &bo0,
+ n_to_alloc,
+ VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+ if (PREDICT_FALSE (n_allocated == 0))
+ {
+ clib_warning ("buffer allocation failure");
+ return;
+ }
+
+ b0 = vlib_get_buffer (vm, bo0);
+
+ /* adjust the sizeof the buffer to just include the ipv6 header */
+ b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t);
+
+ payload_length = sizeof (icmp6_multicast_listener_report_header_t);
+
+ b0->error = ICMP6_ERROR_NONE;
+
+ rp0 = vlib_buffer_get_current (b0);
+ ip0 = (ip6_header_t *) & rp0->ip;
+ rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr;
+
+ memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t));
+
+ ip0->ip_version_traffic_class_and_flow_label =
+ clib_host_to_net_u32 (0x6 << 28);
+
+ ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS;
+ /* for DEBUG - vnet driver won't seem to emit router alerts */
+ /* ip0->protocol = IP_PROTOCOL_ICMP6; */
+ ip0->hop_limit = 1;
+
+ rh0->icmp.type = ICMP6_multicast_listener_report_v2;
+
+ /* source address MUST be the link-local address */
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+ ip0->src_address = radv_info->link_local_address;
+
+ /* destination is all mldpv2 routers */
+ ip6_set_reserved_multicast_address (&ip0->dst_address,
+ IP6_MULTICAST_SCOPE_link_local,
+ IP6_MULTICAST_GROUP_ID_mldv2_routers);
+
+ /* add reports here */
+ ip6_mldp_group_t *m;
+ int num_addr_records = 0;
+ icmp6_multicast_address_record_t rr;
+
+ /* fill in the hop-by-hop extension header (router alert) info */
+ rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6;
+ rh0->ext_hdr.n_data_u64s = 0;
+
+ rh0->alert.type = IP6_MLDP_ALERT_TYPE;
+ rh0->alert.len = 2;
+ rh0->alert.value = 0;
+
+ rh0->pad.type = 1;
+ rh0->pad.len = 0;
+
+ rh0->icmp.checksum = 0;
+
+ /* *INDENT-OFF* */
+ pool_foreach (m, radv_info->mldp_group_pool,
+ ({
+ rr.type = m->type;
+ rr.aux_data_len_u32s = 0;
+ rr.num_sources = clib_host_to_net_u16 (m->num_sources);
+ clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t));
+
+ num_addr_records++;
+
+ vlib_buffer_add_data
+ (vm, vlib_buffer_get_free_list_index (b0), bo0,
+ (void *)&rr, sizeof(icmp6_multicast_address_record_t));
+
+ payload_length += sizeof( icmp6_multicast_address_record_t);
+ }));
+ /* *INDENT-ON* */
+
+ rh0->rsvd = 0;
+ rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
+
+ /* update lengths */
+ ip0->payload_length = clib_host_to_net_u16 (payload_length);
+
+ rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
+ &bogus_length);
+ ASSERT (bogus_length == 0);
+
+ /*
+ * OK to override w/ no regard for actual FIB, because
+ * ip6-rewrite only looks at the adjacency.
+ */
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] =
+ vnet_main.local_interface_sw_if_index;
+
+ vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
+ b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
+
+ vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
+
+ f = vlib_get_frame_to_node (vm, node->index);
+ to_next = vlib_frame_vector_args (f);
+ to_next[0] = bo0;
+ f->n_vectors = 1;
+
+ vlib_put_frame_to_node (vm, node->index, f);
+ return;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
+{
+ .function = icmp6_router_solicitation,
+ .name = "icmp6-router-solicitation",
+
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_icmp6_input_trace,
+
+ .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
+ .next_nodes = {
+ [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "error-drop",
+ [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
+ [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
+ },
+};
+/* *INDENT-ON* */
+
+/* send a RA or update the timer info etc.. */
+static uword
+ip6_neighbor_process_timer_event (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_radv_t *radv_info;
+ vlib_frame_t *f = 0;
+ u32 n_this_frame = 0;
+ u32 n_left_to_next = 0;
+ u32 *to_next = 0;
+ u32 bo0;
+ icmp6_router_solicitation_header_t *h0;
+ vlib_buffer_t *b0;
+ f64 now = vlib_time_now (vm);
+
+ /* Interface ip6 radv info list */
+ /* *INDENT-OFF* */
+ pool_foreach (radv_info, nm->if_radv_pool,
+ ({
+ if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
+ {
+ radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
+ radv_info->next_multicast_time = now;
+ radv_info->last_multicast_time = now;
+ radv_info->last_radv_time = 0;
+ radv_info->all_routers_mcast = 0;
+ continue;
+ }
+
+ /* Make sure that we've joined the all-routers multicast group */
+ if(!radv_info->all_routers_mcast)
+ {
+ /* send MDLP_REPORT_EVENT message */
+ ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
+ radv_info->all_routers_mcast = 1;
+ }
+
+ /* is it time to send a multicast RA on this interface? */
+ if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
+ {
+ u32 n_to_alloc = 1;
+ u32 n_allocated;
+
+ f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
+ random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
+
+ /* multicast send - compute next multicast send time */
+ if( radv_info->initial_adverts_sent > 0)
+ {
+ radv_info->initial_adverts_sent--;
+ if(rfn > radv_info-> initial_adverts_interval)
+ rfn = radv_info-> initial_adverts_interval;
+
+ /* check to see if we are ceasing to send */
+ if( radv_info->initial_adverts_sent == 0)
+ if(radv_info->cease_radv)
+ radv_info->send_radv = 0;
+ }
+
+ radv_info->next_multicast_time = rfn + now;
+ radv_info->last_multicast_time = now;
+
+ /* send advert now - build a "solicted" router advert with unspecified source address */
+ n_allocated = vlib_buffer_alloc_from_free_list
+ (vm, &bo0, n_to_alloc, VLIB_BUFFER_DEFAULT_FREE_LIST_INDEX);
+
+ if (PREDICT_FALSE(n_allocated == 0))
+ {
+ clib_warning ("buffer allocation failure");
+ continue;
+ }
+ b0 = vlib_get_buffer (vm, bo0);
+ b0->current_length = sizeof( icmp6_router_solicitation_header_t);
+ b0->error = ICMP6_ERROR_NONE;
+ vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index;
+
+ h0 = vlib_buffer_get_current (b0);
+
+ memset (h0, 0, sizeof (icmp6_router_solicitation_header_t));
+
+ h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28);
+ h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t)
+ - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor));
+ h0->ip.protocol = IP_PROTOCOL_ICMP6;
+ h0->ip.hop_limit = 255;
+
+ /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */
+ h0->ip.src_address.as_u64[0] = 0;
+ h0->ip.src_address.as_u64[1] = 0;
+
+ h0->ip.dst_address.as_u64[0] = 0;
+ h0->ip.dst_address.as_u64[1] = 0;
+
+ h0->neighbor.icmp.type = ICMP6_router_solicitation;
+
+ if (PREDICT_FALSE(f == 0))
+ {
+ f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index);
+ to_next = vlib_frame_vector_args (f);
+ n_left_to_next = VLIB_FRAME_SIZE;
+ n_this_frame = 0;
+ }
+
+ n_this_frame++;
+ n_left_to_next--;
+ to_next[0] = bo0;
+ to_next += 1;
+
+ if (PREDICT_FALSE(n_left_to_next == 0))
+ {
+ f->n_vectors = n_this_frame;
+ vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
+ f = 0;
+ }
+ }
+ }));
+ /* *INDENT-ON* */
+
+ if (f)
+ {
+ ASSERT (n_this_frame);
+ f->n_vectors = n_this_frame;
+ vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f);
+ }
+ return 0;
+}
+
+static uword
+ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ uword event_type;
+ ip6_icmp_neighbor_discovery_event_data_t *event_data;
+
+ /* init code here */
+
+ while (1)
+ {
+ vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
+
+ event_data = vlib_process_get_event_data (vm, &event_type);
+
+ if (!event_data)
+ {
+ /* No events found: timer expired. */
+ /* process interface list and send RAs as appropriate, update timer info */
+ ip6_neighbor_process_timer_event (vm, node, frame);
+ }
+ else
+ {
+ switch (event_type)
+ {
+
+ case ICMP6_ND_EVENT_INIT:
+ break;
+
+ case ~0:
+ break;
+
+ default:
+ ASSERT (0);
+ }
+
+ if (event_data)
+ _vec_len (event_data) = 0;
+ }
+ }
+ return frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) =
+{
+ .function = icmp6_router_advertisement,
+ .name = "icmp6-router-advertisement",
+
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_icmp6_input_trace,
+
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = {
+
+ .function = ip6_icmp_neighbor_discovery_event_process,
+ .name = "ip6-icmp-neighbor-discovery-event-process",
+ .type = VLIB_NODE_TYPE_PROCESS,
+};
+
+static uword
+icmp6_neighbor_solicitation (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
+ /* is_solicitation */
+ 1);
+}
+
+static uword
+icmp6_neighbor_advertisement (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame,
+ /* is_solicitation */
+ 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) =
+{
+ .function = icmp6_neighbor_solicitation,
+ .name = "icmp6-neighbor-solicitation",
+
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_icmp6_input_trace,
+
+ .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
+ .next_nodes = {
+ [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "error-drop",
+ [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output",
+ },
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) =
+{
+ .function = icmp6_neighbor_advertisement,
+ .name = "icmp6-neighbor-advertisement",
+
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_icmp6_input_trace,
+
+ .n_next_nodes = 1,
+ .next_nodes = {
+ [0] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+/* API support functions */
+int
+ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index,
+ u8 suppress, 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)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ int error;
+ u32 ri;
+
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
+ ~0);
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+ error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ if (!error)
+ {
+
+ ip6_radv_t *radv_info;
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+
+ if ((max_interval != 0) && (min_interval == 0))
+ min_interval = .75 * max_interval;
+
+ max_interval =
+ (max_interval !=
+ 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) :
+ radv_info->max_radv_interval;
+ min_interval =
+ (min_interval !=
+ 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) :
+ radv_info->min_radv_interval;
+ lifetime =
+ (use_lifetime !=
+ 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) :
+ radv_info->adv_router_lifetime_in_sec;
+
+ if (lifetime)
+ {
+ if (lifetime > MAX_DEF_RTR_LIFETIME)
+ lifetime = MAX_DEF_RTR_LIFETIME;
+
+ if (lifetime <= max_interval)
+ return VNET_API_ERROR_INVALID_VALUE;
+ }
+
+ if (min_interval != 0)
+ {
+ if ((min_interval > .75 * max_interval) || (min_interval < 3))
+ return VNET_API_ERROR_INVALID_VALUE;
+ }
+
+ if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) ||
+ (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL))
+ return VNET_API_ERROR_INVALID_VALUE;
+
+ /*
+ if "flag" is set and is_no is true then restore default value else set value corresponding to "flag"
+ if "flag" is clear don't change corresponding value
+ */
+ radv_info->send_radv =
+ (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv;
+ radv_info->adv_managed_flag =
+ (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag;
+ radv_info->adv_other_flag =
+ (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag;
+ radv_info->adv_link_layer_address =
+ (ll_option !=
+ 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address;
+ radv_info->send_unicast =
+ (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast;
+ radv_info->cease_radv =
+ (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv;
+
+ radv_info->min_radv_interval = min_interval;
+ radv_info->max_radv_interval = max_interval;
+ radv_info->adv_router_lifetime_in_sec = lifetime;
+
+ radv_info->initial_adverts_count =
+ (initial_count !=
+ 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) :
+ radv_info->initial_adverts_count;
+ radv_info->initial_adverts_interval =
+ (initial_interval !=
+ 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) :
+ radv_info->initial_adverts_interval;
+
+ /* restart */
+ if ((cease != 0) && (is_no))
+ radv_info->send_radv = 1;
+
+ radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
+ radv_info->next_multicast_time = vlib_time_now (vm);
+ radv_info->last_multicast_time = vlib_time_now (vm);
+ radv_info->last_radv_time = 0;
+ }
+ return (error);
+}
+
+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)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ int error;
+
+ u32 ri;
+
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
+ ~0);
+
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+ error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX;
+
+ if (!error)
+ {
+ f64 now = vlib_time_now (vm);
+ ip6_radv_t *radv_info;
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+
+ /* prefix info add, delete or update */
+ ip6_radv_prefix_t *prefix;
+
+ /* lookup prefix info for this address on this interface */
+ uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr);
+
+ prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0;
+
+ if (is_no)
+ {
+ /* delete */
+ if (!prefix)
+ return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */
+
+ if (prefix->prefix_len != prefix_len)
+ return VNET_API_ERROR_INVALID_VALUE_2;
+
+ /* FIXME - Should the DP do this or the CP ? */
+ /* do specific delete processing here before returning */
+ /* try to remove from routing table */
+
+ mhash_unset (&radv_info->address_to_prefix_index, prefix_addr,
+ /* old_value */ 0);
+ pool_put (radv_info->adv_prefixes_pool, prefix);
+
+ radv_info->initial_adverts_sent =
+ radv_info->initial_adverts_count - 1;
+ radv_info->next_multicast_time = vlib_time_now (vm);
+ radv_info->last_multicast_time = vlib_time_now (vm);
+ radv_info->last_radv_time = 0;
+ return (error);
+ }
+
+ /* adding or changing */
+ if (!prefix)
+ {
+ /* add */
+ u32 pi;
+ pool_get (radv_info->adv_prefixes_pool, prefix);
+ pi = prefix - radv_info->adv_prefixes_pool;
+ mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
+ /* old_value */ 0);
+
+ memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
+
+ prefix->prefix_len = prefix_len;
+ clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
+
+ /* initialize default values */
+ prefix->adv_on_link_flag = 1; /* L bit set */
+ prefix->adv_autonomous_flag = 1; /* A bit set */
+ prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
+ prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
+ prefix->enabled = 1;
+ prefix->decrement_lifetime_flag = 1;
+ prefix->deprecated_prefix_flag = 1;
+
+ if (off_link == 0)
+ {
+ /* FIXME - Should the DP do this or the CP ? */
+ /* insert prefix into routing table as a connected prefix */
+ }
+
+ if (use_default)
+ goto restart;
+ }
+ else
+ {
+
+ if (prefix->prefix_len != prefix_len)
+ return VNET_API_ERROR_INVALID_VALUE_2;
+
+ if (off_link != 0)
+ {
+ /* FIXME - Should the DP do this or the CP ? */
+ /* remove from routing table if already there */
+ }
+ }
+
+ if ((val_lifetime == ~0) || (pref_lifetime == ~0))
+ {
+ prefix->adv_valid_lifetime_in_secs = ~0;
+ prefix->adv_pref_lifetime_in_secs = ~0;
+ prefix->decrement_lifetime_flag = 0;
+ }
+ else
+ {
+ prefix->adv_valid_lifetime_in_secs = val_lifetime;;
+ prefix->adv_pref_lifetime_in_secs = pref_lifetime;
+ }
+
+ /* copy remaining */
+ prefix->enabled = !(no_advertise != 0);
+ prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
+ prefix->adv_autonomous_flag = !(no_autoconfig != 0);
+
+ restart:
+ /* restart */
+ /* fill in the expiration times */
+ prefix->valid_lifetime_expires =
+ now + prefix->adv_valid_lifetime_in_secs;
+ prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
+
+ radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
+ radv_info->next_multicast_time = vlib_time_now (vm);
+ radv_info->last_multicast_time = vlib_time_now (vm);
+ radv_info->last_radv_time = 0;
+ }
+ return (error);
+}
+
+clib_error_t *
+ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
+ vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ clib_error_t *error = 0;
+ u8 is_no = 0;
+ u8 suppress = 0, managed = 0, other = 0;
+ u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
+ u8 use_lifetime = 0;
+ u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
+ 0, ra_initial_interval = 0;
+ u32 ra_max_interval = 0, ra_min_interval = 0;
+
+ unformat_input_t _line_input, *line_input = &_line_input;
+ vnet_sw_interface_t *sw_if0;
+
+ int add_radv_info = 1;
+ __attribute__ ((unused)) ip6_radv_t *radv_info = 0;
+ ip6_address_t ip6_addr;
+ u32 addr_len;
+
+
+ /* Get a line of input. */
+ if (!unformat_user (main_input, unformat_line_input, line_input))
+ return 0;
+
+ /* get basic radv info for this interface */
+ if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+
+ if (unformat_user (line_input,
+ unformat_vnet_sw_interface, vnm, &sw_if_index))
+ {
+ u32 ri;
+ ethernet_interface_t *eth_if0 = 0;
+
+ sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
+ if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
+ eth_if0 =
+ ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
+
+ if (!eth_if0)
+ {
+ error =
+ clib_error_return (0, "Interface must be of ethernet type");
+ goto done;
+ }
+
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
+ sw_if_index, ~0);
+
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+ if (ri != ~0)
+ {
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+ }
+ else
+ {
+ error = clib_error_return (0, "unknown interface %U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+ else
+ {
+ error = clib_error_return (0, "invalid interface name %U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+ }
+
+ /* get the rest of the command */
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "no"))
+ is_no = 1;
+ else if (unformat (line_input, "prefix %U/%d",
+ unformat_ip6_address, &ip6_addr, &addr_len))
+ {
+ add_radv_info = 0;
+ break;
+ }
+ else if (unformat (line_input, "ra-managed-config-flag"))
+ {
+ managed = 1;
+ break;
+ }
+ else if (unformat (line_input, "ra-other-config-flag"))
+ {
+ other = 1;
+ break;
+ }
+ else if (unformat (line_input, "ra-suppress") ||
+ unformat (line_input, "ra-surpress"))
+ {
+ suppress = 1;
+ break;
+ }
+ else if (unformat (line_input, "ra-suppress-link-layer") ||
+ unformat (line_input, "ra-surpress-link-layer"))
+ {
+ suppress_ll_option = 1;
+ break;
+ }
+ else if (unformat (line_input, "ra-send-unicast"))
+ {
+ send_unicast = 1;
+ break;
+ }
+ else if (unformat (line_input, "ra-lifetime"))
+ {
+ if (!unformat (line_input, "%d", &ra_lifetime))
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ use_lifetime = 1;
+ break;
+ }
+ else if (unformat (line_input, "ra-initial"))
+ {
+ if (!unformat
+ (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ break;
+ }
+ else if (unformat (line_input, "ra-interval"))
+ {
+ if (!unformat (line_input, "%d", &ra_max_interval))
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+
+ if (!unformat (line_input, "%d", &ra_min_interval))
+ ra_min_interval = 0;
+ break;
+ }
+ else if (unformat (line_input, "ra-cease"))
+ {
+ cease = 1;
+ break;
+ }
+ else
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ }
+
+ if (add_radv_info)
+ {
+ ip6_neighbor_ra_config (vm, sw_if_index,
+ suppress, managed, other,
+ suppress_ll_option, send_unicast, cease,
+ use_lifetime, ra_lifetime,
+ ra_initial_count, ra_initial_interval,
+ ra_max_interval, ra_min_interval, is_no);
+ }
+ else
+ {
+ u32 valid_lifetime_in_secs = 0;
+ u32 pref_lifetime_in_secs = 0;
+ u8 use_prefix_default_values = 0;
+ u8 no_advertise = 0;
+ u8 off_link = 0;
+ u8 no_autoconfig = 0;
+ u8 no_onlink = 0;
+
+ /* get the rest of the command */
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "default"))
+ {
+ use_prefix_default_values = 1;
+ break;
+ }
+ else if (unformat (line_input, "infinite"))
+ {
+ valid_lifetime_in_secs = ~0;
+ pref_lifetime_in_secs = ~0;
+ break;
+ }
+ else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
+ &pref_lifetime_in_secs))
+ break;
+ else
+ break;
+ }
+
+
+ /* get the rest of the command */
+ while (!use_prefix_default_values &&
+ unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (line_input, "no-advertise"))
+ no_advertise = 1;
+ else if (unformat (line_input, "off-link"))
+ off_link = 1;
+ else if (unformat (line_input, "no-autoconfig"))
+ no_autoconfig = 1;
+ else if (unformat (line_input, "no-onlink"))
+ no_onlink = 1;
+ else
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ }
+
+ ip6_neighbor_ra_prefix (vm, sw_if_index,
+ &ip6_addr, addr_len,
+ use_prefix_default_values,
+ valid_lifetime_in_secs,
+ pref_lifetime_in_secs,
+ no_advertise,
+ off_link, no_autoconfig, no_onlink, is_no);
+ }
+
+done:
+ unformat_free (line_input);
+
+ return error;
+}
+
+static void
+ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
+{
+ ip_lookup_main_t *lm = &ip6_main.lookup_main;
+ u32 i;
+
+ for (i = 0; i < vec_len (addrs); i++)
+ {
+ ip_interface_address_t *a =
+ pool_elt_at_index (lm->if_address_pool, addrs[i]);
+ ip6_address_t *address = ip_interface_address_get_address (lm, a);
+
+ vlib_cli_output (vm, "\t\t%U/%d",
+ format_ip6_address, address, a->address_length);
+ }
+}
+
+static clib_error_t *
+show_ip6_interface_cmd (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ clib_error_t *error = 0;
+ u32 sw_if_index;
+
+ sw_if_index = ~0;
+
+ if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ {
+ u32 ri;
+
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
+ sw_if_index, ~0);
+
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+ if (ri != ~0)
+ {
+ ip_lookup_main_t *lm = &ip6_main.lookup_main;
+ ip6_radv_t *radv_info;
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+
+ vlib_cli_output (vm, "%U is admin %s\n",
+ format_vnet_sw_interface_name, vnm,
+ vnet_get_sw_interface (vnm, sw_if_index),
+ (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
+ "up" : "down"));
+
+ u32 ai;
+ u32 *link_scope = 0, *global_scope = 0;
+ u32 *local_scope = 0, *unknown_scope = 0;
+ ip_interface_address_t *a;
+
+ vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
+ sw_if_index, ~0);
+ ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
+
+ while (ai != (u32) ~ 0)
+ {
+ a = pool_elt_at_index (lm->if_address_pool, ai);
+ ip6_address_t *address =
+ ip_interface_address_get_address (lm, a);
+
+ if (ip6_address_is_link_local_unicast (address))
+ vec_add1 (link_scope, ai);
+ else if (ip6_address_is_global_unicast (address))
+ vec_add1 (global_scope, ai);
+ else if (ip6_address_is_local_unicast (address))
+ vec_add1 (local_scope, ai);
+ else
+ vec_add1 (unknown_scope, ai);
+
+ ai = a->next_this_sw_interface;
+ }
+
+ if (vec_len (link_scope))
+ {
+ vlib_cli_output (vm, "\tLink-local address(es):\n");
+ ip6_print_addrs (vm, link_scope);
+ vec_free (link_scope);
+ }
+
+ if (vec_len (local_scope))
+ {
+ vlib_cli_output (vm, "\tLocal unicast address(es):\n");
+ ip6_print_addrs (vm, local_scope);
+ vec_free (local_scope);
+ }
+
+ if (vec_len (global_scope))
+ {
+ vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
+ ip6_print_addrs (vm, global_scope);
+ vec_free (global_scope);
+ }
+
+ if (vec_len (unknown_scope))
+ {
+ vlib_cli_output (vm, "\tOther-scope address(es):\n");
+ ip6_print_addrs (vm, unknown_scope);
+ vec_free (unknown_scope);
+ }
+
+ vlib_cli_output (vm, "\tJoined group address(es):\n");
+ ip6_mldp_group_t *m;
+ /* *INDENT-OFF* */
+ pool_foreach (m, radv_info->mldp_group_pool,
+ ({
+ vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
+ &m->mcast_address);
+ }));
+ /* *INDENT-ON* */
+
+ vlib_cli_output (vm, "\tAdvertised Prefixes:\n");
+ ip6_radv_prefix_t *p;
+ /* *INDENT-OFF* */
+ pool_foreach (p, radv_info->adv_prefixes_pool,
+ ({
+ vlib_cli_output (vm, "\t\tprefix %U, length %d\n",
+ format_ip6_address, &p->prefix, p->prefix_len);
+ }));
+ /* *INDENT-ON* */
+
+ vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu);
+ vlib_cli_output (vm, "\tICMP error messages are unlimited\n");
+ vlib_cli_output (vm, "\tICMP redirects are disabled\n");
+ vlib_cli_output (vm, "\tICMP unreachables are not sent\n");
+ vlib_cli_output (vm, "\tND DAD is disabled\n");
+ //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",);
+ vlib_cli_output (vm, "\tND advertised reachable time is %d\n",
+ radv_info->adv_neighbor_reachable_time_in_msec);
+ vlib_cli_output (vm,
+ "\tND advertised retransmit interval is %d (msec)\n",
+ radv_info->
+ adv_time_in_msec_between_retransmitted_neighbor_solicitations);
+
+ u32 ra_interval = radv_info->max_radv_interval;
+ u32 ra_interval_min = radv_info->min_radv_interval;
+ vlib_cli_output (vm,
+ "\tND router advertisements are sent every %d seconds (min interval is %d)\n",
+ ra_interval, ra_interval_min);
+ vlib_cli_output (vm,
+ "\tND router advertisements live for %d seconds\n",
+ radv_info->adv_router_lifetime_in_sec);
+ vlib_cli_output (vm,
+ "\tHosts %s stateless autoconfig for addresses\n",
+ (radv_info->adv_managed_flag) ? "use" :
+ " don't use");
+ vlib_cli_output (vm, "\tND router advertisements sent %d\n",
+ radv_info->n_advertisements_sent);
+ vlib_cli_output (vm, "\tND router solicitations received %d\n",
+ radv_info->n_solicitations_rcvd);
+ vlib_cli_output (vm, "\tND router solicitations dropped %d\n",
+ radv_info->n_solicitations_dropped);
+ }
+ else
+ {
+ error = clib_error_return (0, "IPv6 not enabled on interface",
+ format_unformat_error, input);
+
+ }
+ }
+ return error;
+}
+
+/*?
+ * This command is used to display various IPv6 attributes on a given
+ * interface.
+ *
+ * @cliexpar
+ * Example of how to display IPv6 settings:
+ * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
+ * GigabitEthernet2/0/0 is admin up
+ * Link-local address(es):
+ * fe80::ab8/64
+ * Joined group address(es):
+ * ff02::1
+ * ff02::2
+ * ff02::16
+ * ff02::1:ff00:ab8
+ * Advertised Prefixes:
+ * prefix fe80::fe:28ff:fe9c:75b3, length 64
+ * MTU is 1500
+ * ICMP error messages are unlimited
+ * ICMP redirects are disabled
+ * ICMP unreachables are not sent
+ * ND DAD is disabled
+ * ND advertised reachable time is 0
+ * ND advertised retransmit interval is 0 (msec)
+ * ND router advertisements are sent every 200 seconds (min interval is 150)
+ * ND router advertisements live for 600 seconds
+ * Hosts use stateless autoconfig for addresses
+ * ND router advertisements sent 19336
+ * ND router solicitations received 0
+ * ND router solicitations dropped 0
+ * @cliexend
+ * Example of output if IPv6 is not enabled on the interface:
+ * @cliexstart{show ip6 interface GigabitEthernet2/0/0}
+ * show ip6 interface: IPv6 not enabled on interface
+ * @cliexend
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_ip6_interface_command, static) =
+{
+ .path = "show ip6 interface",
+ .function = show_ip6_interface_cmd,
+ .short_help = "show ip6 interface <interface>",
+};
+/* *INDENT-ON* */
+
+clib_error_t *
+disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
+{
+ clib_error_t *error = 0;
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ u32 ri;
+
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
+ ~0);
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+ /* if not created - do nothing */
+ if (ri != ~0)
+ {
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_radv_t *radv_info;
+
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+
+ /* check radv_info ref count for other ip6 addresses on this interface */
+ /* This implicitly excludes the link local address */
+ if (radv_info->ref_count == 0)
+ {
+ /* essentially "disables" ipv6 on this interface */
+ error = ip6_add_del_interface_address (vm, sw_if_index,
+ &radv_info->
+ link_local_address, 128,
+ 1 /* is_del */ );
+
+ ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
+ 0 /* is_add */ );
+ ip6_mfib_interface_enable_disable (sw_if_index, 0);
+ }
+ }
+ return error;
+}
+
+int
+ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ u32 ri = ~0;
+
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
+ ~0);
+
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+ return ri != ~0;
+}
+
+clib_error_t *
+enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
+{
+ clib_error_t *error = 0;
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ u32 ri;
+ int is_add = 1;
+
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
+ ~0);
+
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+ /* if not created yet */
+ if (ri == ~0)
+ {
+ vnet_main_t *vnm = vnet_get_main ();
+ vnet_sw_interface_t *sw_if0;
+
+ sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
+ if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
+ {
+ ethernet_interface_t *eth_if0;
+
+ eth_if0 =
+ ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
+ if (eth_if0)
+ {
+ /* create radv_info. for this interface. This holds all the info needed for router adverts */
+ ri =
+ ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
+
+ if (ri != ~0)
+ {
+ ip6_radv_t *radv_info;
+ ip6_address_t link_local_address;
+
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+
+ ip6_link_local_address_from_ethernet_mac_address
+ (&link_local_address, eth_if0->address);
+
+ sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
+ if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
+ sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
+ {
+ /* make up an interface id */
+ md5_context_t m;
+ u8 digest[16];
+
+ link_local_address.as_u64[0] = radv_info->randomizer;
+
+ md5_init (&m);
+ md5_add (&m, &link_local_address, 16);
+ md5_finish (&m, digest);
+
+ clib_memcpy (&link_local_address, digest, 16);
+
+ radv_info->randomizer = link_local_address.as_u64[0];
+
+ link_local_address.as_u64[0] =
+ clib_host_to_net_u64 (0xFE80000000000000ULL);
+ /* clear u bit */
+ link_local_address.as_u8[8] &= 0xfd;
+ }
+
+ ip6_mfib_interface_enable_disable (sw_if_index, 1);
+
+ /* essentially "enables" ipv6 on this interface */
+ error = ip6_add_del_interface_address (vm, sw_if_index,
+ &link_local_address,
+ 128
+ /* address width */ ,
+ 0 /* is_del */ );
+
+ if (error)
+ ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
+ !is_add);
+ else
+ {
+ radv_info->link_local_address = link_local_address;
+ }
+ }
+ }
+ }
+ }
+ return error;
+}
+
+static clib_error_t *
+enable_ip6_interface_cmd (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ clib_error_t *error = 0;
+ u32 sw_if_index;
+
+ sw_if_index = ~0;
+
+ if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ {
+ enable_ip6_interface (vm, sw_if_index);
+ }
+ else
+ {
+ error = clib_error_return (0, "unknown interface\n'",
+ format_unformat_error, input);
+
+ }
+ return error;
+}
+
+/*?
+ * This command is used to enable IPv6 on a given interface.
+ *
+ * @cliexpar
+ * Example of how enable IPv6 on a given interface:
+ * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (enable_ip6_interface_command, static) =
+{
+ .path = "enable ip6 interface",
+ .function = enable_ip6_interface_cmd,
+ .short_help = "enable ip6 interface <interface>",
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+disable_ip6_interface_cmd (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ clib_error_t *error = 0;
+ u32 sw_if_index;
+
+ sw_if_index = ~0;
+
+ if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ {
+ error = disable_ip6_interface (vm, sw_if_index);
+ }
+ else
+ {
+ error = clib_error_return (0, "unknown interface\n'",
+ format_unformat_error, input);
+
+ }
+ return error;
+}
+
+/*?
+ * This command is used to disable IPv6 on a given interface.
+ *
+ * @cliexpar
+ * Example of how disable IPv6 on a given interface:
+ * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (disable_ip6_interface_command, static) =
+{
+ .path = "disable ip6 interface",
+ .function = disable_ip6_interface_cmd,
+ .short_help = "disable ip6 interface <interface>",
+};
+/* *INDENT-ON* */
+
+/*?
+ * This command is used to configure the neighbor discovery
+ * parameters on a given interface. Use the '<em>show ip6 interface</em>'
+ * command to display some of the current neighbor discovery parameters
+ * on a given interface. This command has three formats:
+ *
+ *
+ * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command)
+ *
+ * '<em><b>ip6 nd <interface> [no] [ra-managed-config-flag] | [ra-other-config-flag] | [ra-suppress] | [ra-suppress-link-layer] | [ra-send-unicast] | [ra-lifetime <lifetime>] | [ra-initial <cnt> <interval>] | [ra-interval <max-interval> [<min-interval>]] | [ra-cease]</b></em>'
+ *
+ * Where:
+ *
+ * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6
+ * router-advertisement messages to use stateful address
+ * auto-configuration to obtain address information (sets the M-bit).
+ * Default is the M-bit is not set and the '<em>no</em>' option
+ * returns it to this default state.
+ *
+ * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6
+ * router-advertisement messages that hosts use stateful auto
+ * configuration to obtain nonaddress related information (sets
+ * the O-bit). Default is the O-bit is not set and the '<em>no</em>'
+ * option returns it to this default state.
+ *
+ * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement
+ * messages. The '<em>no</em>' option implies to enable sending ICMPv6
+ * router-advertisement messages.
+ *
+ * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the
+ * optional source link-layer address in the ICMPv6 router-advertisement
+ * messages. Default is to include the optional source link-layer address
+ * and the '<em>no</em>' option returns it to this default state.
+ *
+ * <em>[no] ra-send-unicast</em> - Use the source address of the
+ * router-solicitation message if availiable. The default is to use
+ * multicast address of all nodes, and the '<em>no</em>' option returns
+ * it to this default state.
+ *
+ * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a
+ * default router in ICMPv6 router-advertisement messages. The range is
+ * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than
+ * '<em><max-interval></em>'. The default value is 600 seconds and the
+ * '<em>no</em>' option returns it to this default value.
+ *
+ * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6
+ * router-advertisement messages sent and the interval between each
+ * message. Range for count is 1 - 3 and default is 3. Range for interval
+ * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option
+ * returns both to their default value.
+ *
+ * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the
+ * interval between sending ICMPv6 router-advertisement messages. The
+ * range for max-interval is from 4 to 200 seconds. min-interval can not
+ * be more than 75% of max-interval. If not set, min-interval will be
+ * set to 75% of max-interval. The range for min-interval is from 3 to
+ * 150 seconds. The '<em>no</em>' option returns both to their default
+ * value.
+ *
+ * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages.
+ * The '<em>no</em>' options implies to start (or restart) sending
+ * ICMPv6 router-advertisement messages.
+ *
+ *
+ * <b>Format 2 - Prefix Options:</b>
+ *
+ * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> [<valid-lifetime> <pref-lifetime> | infinite] [no-advertise] [off-link] [no-autoconfig] [no-onlink]</b></em>'
+ *
+ * Where:
+ *
+ * <em>no</em> - All additional flags are ignored and the prefix is deleted.
+ *
+ * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the
+ * length of time in seconds during what the prefix is valid for the purpose of
+ * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000
+ * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the
+ * length of time in seconds during what addresses generated from the prefix remain
+ * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days).
+ *
+ * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>'
+ * are inifinte, no timeout.
+ *
+ * <em>no-advertise</em> - Do not send full router address in prefix
+ * advertisement. Default is to advertise (i.e. - This flag is off by default).
+ *
+ * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link
+ * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can
+ * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit.
+ *
+ * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet.
+ * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default.
+ *
+ * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet.
+ * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and
+ * this prefix can be used for on-link determination). '<em>off-link</em>' also controls
+ * the L-bit.
+ *
+ *
+ * <b>Format 3: - Default of Prefix:</b>
+ *
+ * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>'
+ *
+ * When a new prefix is added (or existing one is being overwritten) <em>default</em>
+ * uses default values for the prefix. If <em>no</em> is used, the <em>default</em>
+ * is ignored and the prefix is deleted.
+ *
+ *
+ * @cliexpar
+ * Example of how set a router advertisement option:
+ * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20}
+ * Example of how to add a prefix:
+ * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise}
+ * Example of how to delete a prefix:
+ * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (ip6_nd_command, static) =
+{
+ .path = "ip6 nd",
+ .short_help = "ip6 nd <interface> ...",
+ .function = ip6_neighbor_cmd,
+};
+/* *INDENT-ON* */
+
+clib_error_t *
+set_ip6_link_local_address (vlib_main_t * vm,
+ u32 sw_if_index, ip6_address_t * address)
+{
+ clib_error_t *error = 0;
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ u32 ri;
+ ip6_radv_t *radv_info;
+ vnet_main_t *vnm = vnet_get_main ();
+
+ if (!ip6_address_is_link_local_unicast (address))
+ {
+ vnm->api_errno = VNET_API_ERROR_ADDRESS_NOT_LINK_LOCAL;
+ return (error = clib_error_return (0, "address not link-local",
+ format_unformat_error));
+ }
+
+ /* call enable ipv6 */
+ enable_ip6_interface (vm, sw_if_index);
+
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+ if (ri != ~0)
+ {
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+
+ /* save if link local address (overwrite default) */
+
+ /* delete the old one */
+ error = ip6_add_del_interface_address (vm, sw_if_index,
+ &radv_info->link_local_address,
+ 128, 1 /* is_del */ );
+
+ if (!error)
+ {
+ /* add the new one */
+ error = ip6_add_del_interface_address (vm, sw_if_index,
+ address, 128,
+ 0 /* is_del */ );
+
+ if (!error)
+ {
+ radv_info->link_local_address = *address;
+ }
+ }
+ }
+ else
+ {
+ vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
+ error = clib_error_return (0, "ip6 not enabled for interface",
+ format_unformat_error);
+ }
+ return error;
+}
+
+clib_error_t *
+set_ip6_link_local_address_cmd (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ clib_error_t *error = 0;
+ u32 sw_if_index;
+ ip6_address_t ip6_addr;
+
+ if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ {
+ /* get the rest of the command */
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "%U", unformat_ip6_address, &ip6_addr))
+ break;
+ else
+ return (unformat_parse_error (input));
+ }
+ }
+ error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr);
+ return error;
+}
+
+/*?
+ * This command is used to assign an IPv6 Link-local address to an
+ * interface. This command will enable IPv6 on an interface if it
+ * is not already enabled. Use the '<em>show ip6 interface</em>' command
+ * to display the assigned Link-local address.
+ *
+ * @cliexpar
+ * Example of how to assign an IPv6 Link-local address to an interface:
+ * @cliexcmd{set ip6 link-local address GigabitEthernet2/0/0 FE80::AB8}
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_ip6_link_local_address_command, static) =
+{
+ .path = "set ip6 link-local address",
+ .short_help = "set ip6 link-local address <interface> <ip6-address>",
+ .function = set_ip6_link_local_address_cmd,
+};
+/* *INDENT-ON* */
+
+/**
+ * @brief callback when an interface address is added or deleted
+ */
+static void
+ip6_neighbor_add_del_interface_address (ip6_main_t * im,
+ uword opaque,
+ u32 sw_if_index,
+ ip6_address_t * address,
+ u32 address_length,
+ u32 if_address_index, u32 is_delete)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ u32 ri;
+ vlib_main_t *vm = vnm->vlib_main;
+ ip6_radv_t *radv_info;
+ ip6_address_t a;
+
+ /* create solicited node multicast address for this interface adddress */
+ ip6_set_solicited_node_multicast_address (&a, 0);
+
+ a.as_u8[0xd] = address->as_u8[0xd];
+ a.as_u8[0xe] = address->as_u8[0xe];
+ a.as_u8[0xf] = address->as_u8[0xf];
+
+ if (!is_delete)
+ {
+ /* try to create radv_info - does nothing if ipv6 already enabled */
+ enable_ip6_interface (vm, sw_if_index);
+
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
+ sw_if_index, ~0);
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+ if (ri != ~0)
+ {
+ /* get radv_info */
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+
+ /* add address */
+ if (!ip6_address_is_link_local_unicast (address))
+ radv_info->ref_count++;
+
+ ip6_neighbor_add_mld_prefix (radv_info, &a);
+ }
+ }
+ else
+ {
+
+ /* delete */
+ /* look up the radv_t information for this interface */
+ vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
+ sw_if_index, ~0);
+ ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
+
+ if (ri != ~0)
+ {
+ /* get radv_info */
+ radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
+
+ ip6_neighbor_del_mld_prefix (radv_info, &a);
+
+ /* if interface up send MLDP "report" */
+ radv_info->all_routers_mcast = 0;
+
+ /* add address */
+ if (!ip6_address_is_link_local_unicast (address))
+ radv_info->ref_count--;
+ }
+ /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
+ disable_ip6_interface (vm, sw_if_index);
+ }
+}
+
+clib_error_t *
+ip6_set_neighbor_limit (u32 neighbor_limit)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+
+ nm->limit_neighbor_cache_size = neighbor_limit;
+ return 0;
+}
+
+static void
+ip6_neighbor_table_bind (ip6_main_t * im,
+ uword opaque,
+ u32 sw_if_index,
+ u32 new_fib_index, u32 old_fib_index)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_neighbor_t *n = NULL;
+ u32 i, *to_re_add = 0;
+
+ /* *INDENT-OFF* */
+ pool_foreach (n, nm->neighbor_pool,
+ ({
+ if (n->key.sw_if_index == sw_if_index)
+ vec_add1 (to_re_add, n - nm->neighbor_pool);
+ }));
+ /* *INDENT-ON* */
+
+ for (i = 0; i < vec_len (to_re_add); i++)
+ {
+ n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
+ ip6_neighbor_adj_fib_remove (n, old_fib_index);
+ ip6_neighbor_adj_fib_add (n, new_fib_index);
+ }
+ vec_free (to_re_add);
+}
+
+static clib_error_t *
+ip6_neighbor_init (vlib_main_t * vm)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_main_t *im = &ip6_main;
+
+ mhash_init (&nm->neighbor_index_by_key,
+ /* value size */ sizeof (uword),
+ /* key size */ sizeof (ip6_neighbor_key_t));
+
+ icmp6_register_type (vm, ICMP6_neighbor_solicitation,
+ ip6_icmp_neighbor_solicitation_node.index);
+ icmp6_register_type (vm, ICMP6_neighbor_advertisement,
+ ip6_icmp_neighbor_advertisement_node.index);
+ icmp6_register_type (vm, ICMP6_router_solicitation,
+ ip6_icmp_router_solicitation_node.index);
+ icmp6_register_type (vm, ICMP6_router_advertisement,
+ ip6_icmp_router_advertisement_node.index);
+
+ /* handler node for ip6 neighbor discovery events and timers */
+ vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
+
+ /* add call backs */
+ ip6_add_del_interface_address_callback_t cb;
+ memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
+
+ /* when an interface address changes... */
+ cb.function = ip6_neighbor_add_del_interface_address;
+ cb.function_opaque = 0;
+ vec_add1 (im->add_del_interface_address_callbacks, cb);
+
+ ip6_table_bind_callback_t cbt;
+ cbt.function = ip6_neighbor_table_bind;
+ cbt.function_opaque = 0;
+ vec_add1 (im->table_bind_callbacks, cbt);
+
+ mhash_init (&nm->pending_resolutions_by_address,
+ /* value size */ sizeof (uword),
+ /* key size */ sizeof (ip6_address_t));
+
+ mhash_init (&nm->mac_changes_by_address,
+ /* value size */ sizeof (uword),
+ /* key size */ sizeof (ip6_address_t));
+
+ /* default, configurable */
+ nm->limit_neighbor_cache_size = 50000;
+
+ nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
+
+#if 0
+ /* $$$$ Hack fix for today */
+ vec_validate_init_empty
+ (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
+#endif
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (ip6_neighbor_init);
+
+
+void
+vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
+ void *address_arg,
+ uword node_index,
+ uword type_opaque, uword data)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_address_t *address = address_arg;
+ uword *p;
+ pending_resolution_t *pr;
+
+ pool_get (nm->pending_resolutions, pr);
+
+ pr->next_index = ~0;
+ pr->node_index = node_index;
+ pr->type_opaque = type_opaque;
+ pr->data = data;
+
+ p = mhash_get (&nm->pending_resolutions_by_address, address);
+ if (p)
+ {
+ /* Insert new resolution at the head of the list */
+ pr->next_index = p[0];
+ mhash_unset (&nm->pending_resolutions_by_address, address, 0);
+ }
+
+ mhash_set (&nm->pending_resolutions_by_address, address,
+ pr - nm->pending_resolutions, 0 /* old value */ );
+}
+
+int
+vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm,
+ void *data_callback,
+ u32 pid,
+ void *address_arg,
+ uword node_index,
+ uword type_opaque, uword data, int is_add)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_address_t *address = address_arg;
+
+ /* Try to find an existing entry */
+ u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
+ u32 *p = first;
+ pending_resolution_t *mc;
+ while (p && *p != ~0)
+ {
+ mc = pool_elt_at_index (nm->mac_changes, *p);
+ if (mc->node_index == node_index && mc->type_opaque == type_opaque
+ && mc->pid == pid)
+ break;
+ p = &mc->next_index;
+ }
+
+ int found = p && *p != ~0;
+ if (is_add)
+ {
+ if (found)
+ return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
+
+ pool_get (nm->mac_changes, mc);
+ *mc = (pending_resolution_t)
+ {
+ .next_index = ~0,.node_index = node_index,.type_opaque =
+ type_opaque,.data = data,.data_callback = data_callback,.pid =
+ pid,};
+
+ /* Insert new resolution at the end of the list */
+ u32 new_idx = mc - nm->mac_changes;
+ if (p)
+ p[0] = new_idx;
+ else
+ mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
+ }
+ else
+ {
+ if (!found)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
+
+ /* Clients may need to clean up pool entries, too */
+ void (*fp) (u32, u8 *) = data_callback;
+ if (fp)
+ (*fp) (mc->data, 0 /* no new mac addrs */ );
+
+ /* Remove the entry from the list and delete the entry */
+ *p = mc->next_index;
+ pool_put (nm->mac_changes, mc);
+
+ /* Remove from hash if we deleted the last entry */
+ if (*p == ~0 && p == first)
+ mhash_unset (&nm->mac_changes_by_address, address, 0);
+ }
+ return 0;
+}
+
+int
+vnet_ip6_nd_term (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_buffer_t * p0,
+ ethernet_header_t * eth,
+ ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
+
+ ndh = ip6_next_header (ip);
+ if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
+ ndh->icmp.type != ICMP6_neighbor_advertisement)
+ return 0;
+
+ if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
+ (p0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ u8 *t0 = vlib_add_trace (vm, node, p0,
+ sizeof (icmp6_input_trace_t));
+ clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
+ }
+
+ /* Check if anyone want ND events for L2 BDs */
+ if (PREDICT_FALSE
+ (nm->wc_ip6_nd_publisher_node != (uword) ~ 0
+ && !ip6_address_is_link_local_unicast (&ip->src_address)))
+ {
+ vnet_nd_wc_publish (sw_if_index, eth->src_address, &ip->src_address);
+ }
+
+ /* Check if MAC entry exsist for solicited target IP */
+ if (ndh->icmp.type == ICMP6_neighbor_solicitation)
+ {
+ icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
+ l2_bridge_domain_t *bd_config;
+ u8 *macp;
+
+ opt = (void *) (ndh + 1);
+ if ((opt->header.type !=
+ ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
+ (opt->header.n_data_u64s != 1))
+ return 0; /* source link layer address option not present */
+
+ bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
+ macp =
+ (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
+ if (macp)
+ { /* found ip-mac entry, generate eighbor advertisement response */
+ int bogus_length;
+ vlib_node_runtime_t *error_node =
+ vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
+ ip->dst_address = ip->src_address;
+ ip->src_address = ndh->target_address;
+ ip->hop_limit = 255;
+ opt->header.type =
+ ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
+ clib_memcpy (opt->ethernet_address, macp, 6);
+ ndh->icmp.type = ICMP6_neighbor_advertisement;
+ ndh->advertisement_flags = clib_host_to_net_u32
+ (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
+ ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
+ ndh->icmp.checksum = 0;
+ ndh->icmp.checksum =
+ ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
+ clib_memcpy (eth->dst_address, eth->src_address, 6);
+ clib_memcpy (eth->src_address, macp, 6);
+ vlib_error_count (vm, error_node->node_index,
+ ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
+ return 1;
+ }
+ }
+
+ return 0;
+
+}
+
+int
+ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
+{
+ u32 fib_index;
+
+ fib_prefix_t pfx = {
+ .fp_len = 128,
+ .fp_proto = FIB_PROTOCOL_IP6,
+ .fp_addr = {
+ .ip6 = *addr,
+ },
+ };
+ ip46_address_t nh = {
+ .ip6 = *addr,
+ };
+
+ fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
+
+ if (~0 == fib_index)
+ return VNET_API_ERROR_NO_SUCH_FIB;
+
+ if (is_del)
+ {
+ fib_table_entry_path_remove (fib_index,
+ &pfx,
+ FIB_SOURCE_IP6_ND_PROXY,
+ DPO_PROTO_IP6,
+ &nh,
+ sw_if_index,
+ ~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
+ /* flush the ND cache of this address if it's there */
+ vnet_unset_ip6_ethernet_neighbor (vlib_get_main (),
+ sw_if_index, addr, NULL, 0);
+ }
+ else
+ {
+ fib_table_entry_path_add (fib_index,
+ &pfx,
+ FIB_SOURCE_IP6_ND_PROXY,
+ FIB_ENTRY_FLAG_NONE,
+ DPO_PROTO_IP6,
+ &nh,
+ sw_if_index,
+ ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
+ }
+ return (0);
+}
+
+static clib_error_t *
+set_ip6_nd_proxy_cmd (vlib_main_t * vm,
+ unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+ vnet_main_t *vnm = vnet_get_main ();
+ clib_error_t *error = 0;
+ ip6_address_t addr;
+ u32 sw_if_index;
+ u8 is_del = 0;
+
+ if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ {
+ /* get the rest of the command */
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "%U", unformat_ip6_address, &addr))
+ break;
+ else if (unformat (input, "delete") || unformat (input, "del"))
+ is_del = 1;
+ else
+ return (unformat_parse_error (input));
+ }
+ }
+
+ ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
+
+ return error;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
+{
+ .path = "set ip6 nd proxy",
+ .short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
+ .function = set_ip6_nd_proxy_cmd,
+};
+/* *INDENT-ON* */
+
+void
+ethernet_ndp_change_mac (u32 sw_if_index)
+{
+ ip6_neighbor_main_t *nm = &ip6_neighbor_main;
+ ip6_neighbor_t *n;
+
+ /* *INDENT-OFF* */
+ pool_foreach (n, nm->neighbor_pool,
+ ({
+ if (n->key.sw_if_index == sw_if_index)
+ {
+ adj_nbr_walk_nh6 (sw_if_index,
+ &n->key.ip6_address,
+ ip6_nd_mk_complete_walk, n);
+ }
+ }));
+ /* *INDENT-ON* */
+}
+
+void
+send_ip6_na (vlib_main_t * vm, vnet_hw_interface_t * hi)
+{
+ ip6_main_t *i6m = &ip6_main;
+ u32 sw_if_index = hi->sw_if_index;
+ ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
+ if (ip6_addr)
+ {
+ clib_warning
+ ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
+ format_ip6_address, ip6_addr, sw_if_index);
+
+ /* Form unsolicited neighbor advertisement packet from NS pkt template */
+ int bogus_length;
+ u32 bi = 0;
+ icmp6_neighbor_solicitation_header_t *h =
+ vlib_packet_template_get_packet (vm,
+ &i6m->discover_neighbor_packet_template,
+ &bi);
+ ip6_set_reserved_multicast_address (&h->ip.dst_address,
+ IP6_MULTICAST_SCOPE_link_local,
+ IP6_MULTICAST_GROUP_ID_all_hosts);
+ h->ip.src_address = ip6_addr[0];
+ h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
+ h->neighbor.target_address = ip6_addr[0];
+ h->neighbor.advertisement_flags = clib_host_to_net_u32
+ (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
+ clib_memcpy (h->link_layer_option.ethernet_address,
+ hi->hw_address, vec_len (hi->hw_address));
+ h->neighbor.icmp.checksum =
+ ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
+ ASSERT (bogus_length == 0);
+
+ /* Setup MAC header with IP6 Etype and mcast DMAC */
+ vlib_buffer_t *b = vlib_get_buffer (vm, bi);
+ vlib_buffer_advance (b, -sizeof (ethernet_header_t));
+ ethernet_header_t *e = vlib_buffer_get_current (b);
+ e->type = clib_host_to_net_u16 (ETHERNET_TYPE_IP6);
+ clib_memcpy (e->src_address, hi->hw_address, sizeof (e->src_address));
+ ip6_multicast_ethernet_address (e->dst_address,
+ IP6_MULTICAST_GROUP_ID_all_hosts);
+
+ /* Send unsolicited ND advertisement packet out the specified interface */
+ vnet_buffer (b)->sw_if_index[VLIB_RX] =
+ vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
+ vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
+ u32 *to_next = vlib_frame_vector_args (f);
+ to_next[0] = bi;
+ f->n_vectors = 1;
+ vlib_put_frame_to_node (vm, hi->output_node_index, f);
+ }
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */