+++ /dev/null
-/*
- * 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/fib/fib_table.h>
-#include <vnet/fib/ip6_fib.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;
- u32 fib_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 all_nodes_adj_index;
- adj_index_t all_routers_adj_index;
- adj_index_t all_mldv2_routers_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;
- u8 link_local_prefix_len;
-
-} 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;
-
-} ip6_neighbor_main_t;
-
-static ip6_neighbor_main_t ip6_neighbor_main;
-static ip6_address_t ip6a_zero; /* ip6 address 0 */
-
-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");
-
- 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 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);
- fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
- 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 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_addreess, int is_add, int is_static)
-{
- 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;
- clib_memcpy (&args.addr, a, sizeof (*a));
- clib_memcpy (args.link_layer_address, link_layer_addreess, 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);
-
- 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);
- }
-}
-
-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)
-{
- 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 (os_get_cpu_number ())
- {
- set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
- 1 /* set new neighbor */ , is_static);
- 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)
- {
- fib_prefix_t pfx = {
- .fp_len = 128,
- .fp_proto = FIB_PROTOCOL_IP6,
- .fp_addr = {
- .ip6 = k.ip6_address,
- }
- ,
- };
- u32 fib_index;
-
- pool_get (nm->neighbor_pool, n);
- mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
- /* old value */ 0);
- n->key = k;
-
- 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.
- */
- fib_index = ip6_main.fib_index_by_sw_if_index[n->key.sw_if_index];
- n->fib_entry_index = fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_ADJ, FIB_ENTRY_FLAG_NONE, FIB_PROTOCOL_IP6, &pfx.fp_addr, n->key.sw_if_index, ~0, 1, NULL, // no label stack
- FIB_ROUTE_PATH_FLAG_NONE);
- }
- 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))
- return -1;
-
- 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);
-
- /* 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 (os_get_cpu_number ())
- {
- set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, link_layer_address,
- 0 /* unset */ , 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);
-
- fib_table_entry_delete_index (n->fib_entry_index, FIB_SOURCE_ADJ);
- 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);
- 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;
- 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
- 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);
- 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 =
- ip_get_adjacency (&im->lookup_main, 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_sadd_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,
- is_solicitation ?
- &ip0->src_address :
- &h0->target_address,
- o0->ethernet_address,
- sizeof (o0->ethernet_address),
- 0);
- }
-
- 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 ||
- !(FIB_ENTRY_FLAG_LOCAL &
- fib_entry_get_flags_for_source (fei,
- FIB_SOURCE_INTERFACE)))
- {
- 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 (ðernet_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 = ip_get_adjacency (&im->lookup_main,
- 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);
- }
-
- /* 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 (ðernet_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 ((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,
- p0->free_list_index,
- 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,
- p0->free_list_index,
- 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,
- p0->free_list_index,
- 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,
- p0->free_list_index,
- 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->all_nodes_adj_index;
- if (adj_index0 == 0)
- error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
- else
- {
- ip_adjacency_t *adj0 =
- ip_get_adjacency (&im->lookup_main,
- adj_index0);
- error0 =
- ((adj0->rewrite_header.sw_if_index !=
- sw_if_index0
- || adj0->lookup_next_index !=
- IP_LOOKUP_NEXT_REWRITE) ?
- ICMP6_ERROR_ROUTER_SOLICITATION_DEST_UNKNOWN
- : error0);
- next0 =
- is_dropped ? next0 :
- ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
- vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
- adj_index0;
- }
- }
- p0->flags |= VNET_BUFFER_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 (ðernet_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;
-}
-
-/* create and initialize router advertisement parameters with default values for this intfc */
-static 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 (ðernet_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)
- {
- u32 i, *to_delete = 0;
- ip6_radv_prefix_t *p;
- ip6_mldp_group_t *m;
-
- /* remove adjacencies */
- adj_unlock (a->all_nodes_adj_index);
- adj_unlock (a->all_routers_adj_index);
- adj_unlock (a->all_mldv2_routers_adj_index);
-
- /* clean up prefix_pool */
- /* *INDENT-OFF* */
- pool_foreach (p, a->adv_prefixes_pool,
- ({
- vec_add1 (to_delete, p - a->adv_prefixes_pool);
- }));
- /* *INDENT-ON* */
-
- for (i = 0; i < vec_len (to_delete); i++)
- {
- p = pool_elt_at_index (a->adv_prefixes_pool, to_delete[i]);
- mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
- pool_put (a->adv_prefixes_pool, p);
- }
-
- vec_free (to_delete);
- to_delete = 0;
-
- /* clean up mldp group pool */
- /* *INDENT-OFF* */
- pool_foreach (m, a->mldp_group_pool,
- ({
- vec_add1 (to_delete, m - a->mldp_group_pool);
- }));
- /* *INDENT-ON* */
-
- for (i = 0; i < vec_len (to_delete); i++)
- {
- m = pool_elt_at_index (a->mldp_group_pool, to_delete[i]);
- mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
- pool_put (a->mldp_group_pool, m);
- }
-
- vec_free (to_delete);
-
- 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->fib_index = ~0;
- 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;
-
- a->adv_link_layer_address = 1; /* send ll address source address option */
-
- 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);
- a->link_local_prefix_len = 64;
-
- 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));
-
- {
- u8 link_layer_address[6] = { 0x33, 0x33, 0x00, 0x00, 0x00,
- IP6_MULTICAST_GROUP_ID_all_hosts
- };
-
- a->all_nodes_adj_index =
- adj_rewrite_add_and_lock (FIB_PROTOCOL_IP6, VNET_LINK_IP6,
- sw_if_index, link_layer_address);
- }
-
- {
- u8 link_layer_address[6] = { 0x33, 0x33, 0x00, 0x00, 0x00,
- IP6_MULTICAST_GROUP_ID_all_routers
- };
-
- a->all_routers_adj_index =
- adj_rewrite_add_and_lock (FIB_PROTOCOL_IP6, VNET_LINK_IP6,
- sw_if_index, link_layer_address);
- }
-
- {
- u8 link_layer_address[6] = { 0x33, 0x33, 0x00, 0x00, 0x00,
- IP6_MULTICAST_GROUP_ID_mldv2_routers
- };
-
- a->all_mldv2_routers_adj_index =
- adj_rewrite_add_and_lock (FIB_PROTOCOL_IP6,
- VNET_LINK_IP6,
- sw_if_index, link_layer_address);
- }
-
- /* add multicast groups we will always be reporting */
- ip6_address_t addr;
- ip6_mldp_group_t *mcast_group_info;
-
- ip6_set_reserved_multicast_address (&addr,
- IP6_MULTICAST_SCOPE_link_local,
- IP6_MULTICAST_GROUP_ID_all_hosts);
-
- /* lookup mldp info for this interface */
-
- uword *p = mhash_get (&a->address_to_mldp_index, &addr);
- mcast_group_info =
- p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
-
- /* add address */
- if (!mcast_group_info)
- {
- /* add */
- u32 mi;
- pool_get (a->mldp_group_pool, mcast_group_info);
-
- mi = mcast_group_info - a->mldp_group_pool;
- mhash_set (&a->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));
- }
-
- ip6_set_reserved_multicast_address (&addr,
- IP6_MULTICAST_SCOPE_link_local,
- IP6_MULTICAST_GROUP_ID_all_routers);
-
- p = mhash_get (&a->address_to_mldp_index, &addr);
- mcast_group_info =
- p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
-
- if (!mcast_group_info)
- {
- /* add */
- u32 mi;
- pool_get (a->mldp_group_pool, mcast_group_info);
-
- mi = mcast_group_info - a->mldp_group_pool;
- mhash_set (&a->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));
- }
-
- ip6_set_reserved_multicast_address (&addr,
- IP6_MULTICAST_SCOPE_link_local,
- IP6_MULTICAST_GROUP_ID_mldv2_routers);
-
- p = mhash_get (&a->address_to_mldp_index, &addr);
- mcast_group_info =
- p ? pool_elt_at_index (a->mldp_group_pool, p[0]) : 0;
-
- if (!mcast_group_info)
- {
- /* add */
- u32 mi;
- pool_get (a->mldp_group_pool, mcast_group_info);
-
- mi = mcast_group_info - a->mldp_group_pool;
- mhash_set (&a->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));
- }
- }
- }
- 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 (ðernet_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, b0->free_list_index, 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->all_mldv2_routers_adj_index;
- b0->flags |= VNET_BUFFER_LOCALLY_ORIGINATED;
-
- vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite");
-
- 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",
- [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 (ðernet_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))
- return (error = unformat_parse_error (line_input));
- use_lifetime = 1;
- break;
- }
- else if (unformat (line_input, "ra-initial"))
- {
- if (!unformat
- (line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
- return (error = unformat_parse_error (line_input));
- break;
- }
- else if (unformat (line_input, "ra-interval"))
- {
- if (!unformat (line_input, "%d", &ra_max_interval))
- return (error = unformat_parse_error (line_input));
-
- if (!unformat (line_input, "%d", &ra_min_interval))
- ra_min_interval = 0;
- break;
- }
- else if (unformat (line_input, "ra-cease"))
- {
- cease = 1;
- break;
- }
- else
- return (unformat_parse_error (line_input));
- }
-
- 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
- return (unformat_parse_error (line_input));
- }
-
- 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);
- }
-
- unformat_free (line_input);
-
-done:
- 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 */
- 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,
- radv_info->
- link_local_prefix_len,
- 1 /* is_del */ );
-
- ip6_neighbor_sw_interface_add_del (vnm, sw_if_index,
- 0 /* is_add */ );
- }
- }
- 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 (ðernet_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)
- {
- /* 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;
- }
-
- /* 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;
- radv_info->link_local_prefix_len = 64;
- }
- }
- }
- }
- }
- 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, u8 address_length)
-{
- 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,
- radv_info->link_local_prefix_len
- /* address width */ ,
- 1 /* is_del */ );
-
- if (!error)
- {
- /* add the new one */
- error = ip6_add_del_interface_address (vm, sw_if_index,
- address, address_length
- /* address width */ ,
- 0 /* is_del */ );
-
- if (!error)
- {
- radv_info->link_local_address = *address;
- radv_info->link_local_prefix_len = address_length;
- }
- }
- }
- 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;
- u32 addr_len = 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/%d",
- unformat_ip6_address, &ip6_addr, &addr_len))
- break;
- else
- return (unformat_parse_error (input));
- }
- }
- error = set_ip6_link_local_address (vm, sw_if_index, &ip6_addr, addr_len);
- 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::AB8/64}
-?*/
-/* *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>/<width>",
- .function = set_ip6_link_local_address_cmd,
-};
-/* *INDENT-ON* */
-
-/* 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;
- ip6_mldp_group_t *mcast_group_info;
-
- /* 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++;
-
- /* lookup prefix info for this address on this interface */
- uword *p = mhash_get (&radv_info->address_to_mldp_index, &a);
- mcast_group_info =
- p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
-
- /* add -solicted node multicast 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, &a, 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, &a,
- sizeof (ip6_address_t));
- }
- }
- }
- 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);
-
- /* lookup prefix info for this address on this interface */
- uword *p = mhash_get (&radv_info->address_to_mldp_index, &a);
- 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, &a,
- /* old_value */ 0);
- pool_put (radv_info->mldp_group_pool, mcast_group_info);
- }
-
- /* 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--;
- }
- }
-}
-
-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 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);
-
- 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;
-
-#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;
- uword *p;
- pending_resolution_t *mc;
- void (*fp) (u32, u8 *) = data_callback;
-
- if (is_add)
- {
- pool_get (nm->mac_changes, mc);
-
- mc->next_index = ~0;
- mc->node_index = node_index;
- mc->type_opaque = type_opaque;
- mc->data = data;
- mc->data_callback = data_callback;
- mc->pid = pid;
-
- p = mhash_get (&nm->mac_changes_by_address, address);
- if (p)
- {
- /* Insert new resolution at the head of the list */
- mc->next_index = p[0];
- mhash_unset (&nm->mac_changes_by_address, address, 0);
- }
-
- mhash_set (&nm->mac_changes_by_address, address,
- mc - nm->mac_changes, 0);
- return 0;
- }
- else
- {
- u32 index;
- pending_resolution_t *mc_last = 0;
-
- p = mhash_get (&nm->mac_changes_by_address, address);
- if (p == 0)
- return VNET_API_ERROR_NO_SUCH_ENTRY;
-
- index = p[0];
-
- while (index != (u32) ~ 0)
- {
- mc = pool_elt_at_index (nm->mac_changes, index);
- if (mc->node_index == node_index &&
- mc->type_opaque == type_opaque && mc->pid == pid)
- {
- /* Clients may need to clean up pool entries, too */
- if (fp)
- (*fp) (mc->data, 0 /* no new mac addrs */ );
- if (index == p[0])
- {
- mhash_unset (&nm->mac_changes_by_address, address, 0);
- if (mc->next_index != ~0)
- mhash_set (&nm->mac_changes_by_address, address,
- mc->next_index, 0);
- pool_put (nm->mac_changes, mc);
- return 0;
- }
- else
- {
- ASSERT (mc_last);
- mc_last->next_index = mc->next_index;
- pool_put (nm->mac_changes, mc);
- return 0;
- }
- }
- mc_last = mc;
- index = mc->next_index;
- }
-
- return VNET_API_ERROR_NO_SUCH_ENTRY;
- }
-}
-
-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, u8 shg)
-{
- ip6_neighbor_main_t *nm = &ip6_neighbor_main;
- icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
- pending_resolution_t *mc;
- uword *p;
-
- 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 */
- p = mhash_get (&nm->mac_changes_by_address, &ip6a_zero);
- if (p && shg == 0 && /* Only SHG 0 interface which is more likely local */
- !ip6_address_is_link_local_unicast (&ip->src_address))
- {
- u32 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 callback, return 1 to suppress dup events */
- if (fp)
- rv = (*fp) (mc->data,
- eth->src_address, sw_if_index, &ip->src_address);
- /* Signal the resolver process */
- if (rv == 0)
- vlib_process_signal_event (vm, mc->node_index,
- mc->type_opaque, mc->data);
- next_index = mc->next_index;
- }
- }
-
- /* 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;
-
-}
-
-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* */
-}
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
Code Review / vpp.git / blobdiff