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gerrit.nordix.org / fdio / vpp / 960eeea7ea48d91c1f2ec3a85a7a84f56619be2a / . / src / vnet / ip / ip6_neighbor.c
blob: 363be4e42d22e84dd2799b16143e9d347d313b48 [file] [log] [blame]
/*
* 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 <vnet/adj/adj.h>
#include <vnet/adj/adj_mcast.h>
#include <vnet/fib/fib_table.h>
#include <vnet/fib/ip6_fib.h>
#include <vnet/mfib/ip6_mfib.h>
#include <vnet/ip/ip6_ll_table.h>
#include <vnet/l2/l2_input.h>
#include <vlibmemory/api.h>
/**
* @file
* @brief IPv6 Neighbor Adjacency and Neighbor Discovery.
*
* The files contains the API and CLI code for managing IPv6 neighbor
* adjacency tables and neighbor discovery logic.
*/
/* can't use sizeof link_layer_address, that's 8 */
#define ETHER_MAC_ADDR_LEN 6
/* advertised prefix option */
typedef struct
{
/* basic advertised information */
ip6_address_t prefix;
u8 prefix_len;
int adv_on_link_flag;
int adv_autonomous_flag;
u32 adv_valid_lifetime_in_secs;
u32 adv_pref_lifetime_in_secs;
/* advertised values are computed from these times if decrementing */
f64 valid_lifetime_expires;
f64 pref_lifetime_expires;
/* local information */
int enabled;
int deprecated_prefix_flag;
int decrement_lifetime_flag;
#define MIN_ADV_VALID_LIFETIME 7203 /* seconds */
#define DEF_ADV_VALID_LIFETIME 2592000
#define DEF_ADV_PREF_LIFETIME 604800
/* extensions are added here, mobile, DNS etc.. */
} ip6_radv_prefix_t;
typedef struct
{
/* group information */
u8 type;
ip6_address_t mcast_address;
u16 num_sources;
ip6_address_t *mcast_source_address_pool;
} ip6_mldp_group_t;
/* configured router advertisement information per ipv6 interface */
typedef struct
{
/* advertised config information, zero means unspecified */
u8 curr_hop_limit;
int adv_managed_flag;
int adv_other_flag;
u16 adv_router_lifetime_in_sec;
u32 adv_neighbor_reachable_time_in_msec;
u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations;
/* mtu option */
u32 adv_link_mtu;
/* source link layer option */
u8 link_layer_address[8];
u8 link_layer_addr_len;
/* prefix option */
ip6_radv_prefix_t *adv_prefixes_pool;
/* Hash table mapping address to index in interface advertised prefix pool. */
mhash_t address_to_prefix_index;
/* MLDP group information */
ip6_mldp_group_t *mldp_group_pool;
/* Hash table mapping address to index in mldp address pool. */
mhash_t address_to_mldp_index;
/* local information */
u32 sw_if_index;
int send_radv; /* radv on/off on this interface - set by config */
int cease_radv; /* we are ceasing to send - set byf config */
int send_unicast;
int adv_link_layer_address;
int prefix_option;
int failed_device_check;
int all_routers_mcast;
u32 seed;
u64 randomizer;
int ref_count;
adj_index_t mcast_adj_index;
/* timing information */
#define DEF_MAX_RADV_INTERVAL 200
#define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL
#define DEF_CURR_HOP_LIMIT 64
#define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL
#define MAX_DEF_RTR_LIFETIME 9000
#define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */
#define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */
#define MIN_DELAY_BETWEEN_RAS 3 /* seconds */
#define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */
#define MAX_RA_DELAY_TIME .5 /* seconds */
f64 max_radv_interval;
f64 min_radv_interval;
f64 min_delay_between_radv;
f64 max_delay_between_radv;
f64 max_rtr_default_lifetime;
f64 last_radv_time;
f64 last_multicast_time;
f64 next_multicast_time;
u32 initial_adverts_count;
f64 initial_adverts_interval;
u32 initial_adverts_sent;
/* stats */
u32 n_advertisements_sent;
u32 n_solicitations_rcvd;
u32 n_solicitations_dropped;
/* Link local address to use (defaults to underlying physical for logical interfaces */
ip6_address_t link_local_address;
/* router solicitations sending state */
u8 keep_sending_rs; /* when true then next fields are valid */
icmp6_send_router_solicitation_params_t params;
f64 sleep_interval;
f64 due_time;
u32 n_left;
f64 start_time;
vlib_buffer_t *buffer;
} ip6_radv_t;
typedef struct
{
u32 next_index;
uword node_index;
uword type_opaque;
uword data;
/* Used for nd event notification only */
ip6_nd_change_event_cb_t data_callback;
u32 pid;
} pending_resolution_t;
typedef struct
{
/* Hash tables mapping name to opcode. */
uword *opcode_by_name;
/* lite beer "glean" adjacency handling */
mhash_t pending_resolutions_by_address;
pending_resolution_t *pending_resolutions;
/* Mac address change notification */
mhash_t mac_changes_by_address;
pending_resolution_t *mac_changes;
u32 *neighbor_input_next_index_by_hw_if_index;
ip6_neighbor_t *neighbor_pool;
mhash_t neighbor_index_by_key;
u32 *if_radv_pool_index_by_sw_if_index;
ip6_radv_t *if_radv_pool;
/* Neighbor attack mitigation */
u32 limit_neighbor_cache_size;
u32 neighbor_delete_rotor;
/* Wildcard nd report publisher */
uword wc_ip6_nd_publisher_node;
uword wc_ip6_nd_publisher_et;
/* Router advertisement report publisher */
uword ip6_ra_publisher_node;
uword ip6_ra_publisher_et;
} ip6_neighbor_main_t;
/* ipv6 neighbor discovery - timer/event types */
typedef enum
{
ICMP6_ND_EVENT_INIT,
} ip6_icmp_neighbor_discovery_event_type_t;
typedef union
{
u32 add_del_swindex;
struct
{
u32 up_down_swindex;
u32 fib_index;
} up_down_event;
} ip6_icmp_neighbor_discovery_event_data_t;
static ip6_neighbor_main_t ip6_neighbor_main;
ip6_neighbor_public_main_t ip6_neighbor_public_main;
static ip6_address_t ip6a_zero; /* ip6 address 0 */
static void wc_nd_signal_report (wc_nd_report_t * r);
static void ra_signal_report (ra_report_t * r);
ip6_address_t
ip6_neighbor_get_link_local_address (u32 sw_if_index)
{
static ip6_address_t empty_address = { {0} };
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_radv_t *radv_info;
u32 ri = ~0;
if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index)
ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
if (ri == ~0)
{
clib_warning ("IPv6 is not enabled for sw_if_index %d", sw_if_index);
return empty_address;
}
radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
if (radv_info == NULL)
{
clib_warning ("Internal error");
return empty_address;
}
return radv_info->link_local_address;
}
/**
* @brief publish wildcard arp event
* @param sw_if_index The interface on which the ARP entries are acted
*/
static int
vnet_nd_wc_publish (u32 sw_if_index,
const mac_address_t * mac, const ip6_address_t * ip6)
{
wc_nd_report_t r = {
.sw_if_index = sw_if_index,
.ip6 = *ip6,
.mac = *mac,
};
vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r);
return 0;
}
static void
wc_nd_signal_report (wc_nd_report_t * r)
{
vlib_main_t *vm = vlib_get_main ();
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
uword ni = nm->wc_ip6_nd_publisher_node;
uword et = nm->wc_ip6_nd_publisher_et;
if (ni == (uword) ~ 0)
return;
wc_nd_report_t *q =
vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
*q = *r;
}
void
wc_nd_set_publisher_node (uword node_index, uword event_type)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
nm->wc_ip6_nd_publisher_node = node_index;
nm->wc_ip6_nd_publisher_et = event_type;
}
static int
ra_publish (ra_report_t * r)
{
void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
vl_api_rpc_call_main_thread (ra_signal_report, (u8 *) r, sizeof *r);
return 0;
}
static void
ra_signal_report (ra_report_t * r)
{
vlib_main_t *vm = vlib_get_main ();
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
uword ni = nm->ip6_ra_publisher_node;
uword et = nm->ip6_ra_publisher_et;
if (ni == (uword) ~ 0)
return;
ra_report_t *q = vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q);
*q = *r;
}
void
ra_set_publisher_node (uword node_index, uword event_type)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
nm->ip6_ra_publisher_node = node_index;
nm->ip6_ra_publisher_et = event_type;
}
static u8 *
format_ip6_neighbor_ip6_entry (u8 * s, va_list * va)
{
vlib_main_t *vm = va_arg (*va, vlib_main_t *);
ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *);
vnet_main_t *vnm = vnet_get_main ();
vnet_sw_interface_t *si;
if (!n)
return format (s, "%=12s%=45s%=6s%=20s%=40s", "Time", "Address", "Flags",
"Link layer", "Interface");
si = vnet_get_sw_interface (vnm, n->key.sw_if_index);
return format (s, "%=12U%=45U%=6U%=20U%=40U",
format_vlib_time, vm, n->time_last_updated,
format_ip6_address, &n->key.ip6_address,
format_ip_neighbor_flags, n->flags,
format_mac_address_t, &n->mac,
format_vnet_sw_interface_name, vnm, si);
}
static void
ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index)
{
if (FIB_NODE_INDEX_INVALID != n->fib_entry_index)
{
if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
{
ip6_ll_prefix_t pfx = {
.ilp_addr = n->key.ip6_address,
.ilp_sw_if_index = n->key.sw_if_index,
};
ip6_ll_table_entry_delete (&pfx);
}
else
{
fib_prefix_t pfx = {
.fp_len = 128,
.fp_proto = FIB_PROTOCOL_IP6,
.fp_addr.ip6 = n->key.ip6_address,
};
fib_table_entry_path_remove (fib_index,
&pfx,
FIB_SOURCE_ADJ,
DPO_PROTO_IP6,
&pfx.fp_addr,
n->key.sw_if_index, ~0,
1, FIB_ROUTE_PATH_FLAG_NONE);
}
}
}
typedef struct
{
u8 is_add;
ip_neighbor_flags_t flags;
mac_address_t mac;
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,
const ip6_address_t * a,
const mac_address_t * mac, int is_add, ip_neighbor_flags_t flags)
{
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.flags = flags;
ip6_address_copy (&args.addr, a);
mac_address_copy (&args.mac, mac);
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);
if (!h)
return;
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->mac.bytes));
}
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);
}
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;
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* */
if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
{
for (i = 0; i < vec_len (to_delete); i++)
{
n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
ip6_nd_mk_complete_walk, n);
}
}
else
{
for (i = 0; i < vec_len (to_delete); i++)
{
n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]);
adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address,
ip6_nd_mk_incomplete_walk, NULL);
if (n->flags & IP_NEIGHBOR_FLAG_STATIC)
continue;
ip6_neighbor_adj_fib_remove (n,
ip6_fib_table_get_index_for_sw_if_index
(n->key.sw_if_index));
mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
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);
void
ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
{
ip6_neighbor_t *nbr;
ip_adjacency_t *adj;
adj = adj_get (ai);
nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6);
switch (adj->lookup_next_index)
{
case IP_LOOKUP_NEXT_GLEAN:
adj_glean_update_rewrite (ai);
break;
case IP_LOOKUP_NEXT_ARP:
if (NULL != nbr)
{
adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address,
ip6_nd_mk_complete_walk, nbr);
}
else
{
/*
* no matching ND entry.
* construct the rewrite required to for an ND packet, and stick
* that in the adj's pipe to smoke.
*/
adj_nbr_update_rewrite (ai,
ADJ_NBR_REWRITE_FLAG_INCOMPLETE,
ethernet_build_rewrite (vnm,
sw_if_index,
VNET_LINK_IP6,
VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
/*
* since the FIB has added this adj for a route, it makes sense it may
* want to forward traffic sometime soon. Let's send a speculative ND.
* just one. If we were to do periodically that wouldn't be bad either,
* but that's more code than i'm prepared to write at this time for
* relatively little reward.
*/
ip6_nbr_probe (adj);
}
break;
case IP_LOOKUP_NEXT_BCAST:
adj_nbr_update_rewrite (ai,
ADJ_NBR_REWRITE_FLAG_COMPLETE,
ethernet_build_rewrite (vnm,
sw_if_index,
VNET_LINK_IP6,
VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
break;
case IP_LOOKUP_NEXT_MCAST:
{
/*
* Construct a partial rewrite from the known ethernet mcast dest MAC
*/
u8 *rewrite;
u8 offset;
rewrite = ethernet_build_rewrite (vnm,
sw_if_index,
adj->ia_link,
ethernet_ip6_mcast_dst_addr ());
/*
* Complete the remaining fields of the adj's rewrite to direct the
* complete of the rewrite at switch time by copying in the IP
* dst address's bytes.
* Ofset is 2 bytes into the destintation address.
*/
offset = vec_len (rewrite) - 2;
adj_mcast_update_rewrite (ai, rewrite, offset);
break;
}
case IP_LOOKUP_NEXT_DROP:
case IP_LOOKUP_NEXT_PUNT:
case IP_LOOKUP_NEXT_LOCAL:
case IP_LOOKUP_NEXT_REWRITE:
case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
case IP_LOOKUP_NEXT_MIDCHAIN:
case IP_LOOKUP_NEXT_ICMP_ERROR:
case IP_LOOKUP_N_NEXT:
ASSERT (0);
break;
}
}
static void
ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index)
{
if (ip6_address_is_link_local_unicast (&n->key.ip6_address))
{
ip6_ll_prefix_t pfx = {
.ilp_addr = n->key.ip6_address,
.ilp_sw_if_index = n->key.sw_if_index,
};
n->fib_entry_index =
ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE);
}
else
{
fib_prefix_t pfx = {
.fp_len = 128,
.fp_proto = FIB_PROTOCOL_IP6,
.fp_addr.ip6 = n->key.ip6_address,
};
n->fib_entry_index =
fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
FIB_ENTRY_FLAG_ATTACHED,
DPO_PROTO_IP6, &pfx.fp_addr,
n->key.sw_if_index, ~0, 1, NULL,
FIB_ROUTE_PATH_FLAG_NONE);
}
}
static ip6_neighbor_t *
force_reuse_neighbor_entry (void)
{
ip6_neighbor_t *n;
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
u32 count = 0;
u32 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor);
if (index == ~0) /* Try again from elt 0 */
index = pool_next_index (nm->neighbor_pool, index);
/* Find a non-static random entry to free up for reuse */
do
{
if ((count++ == 100) || (index == ~0))
return NULL; /* give up after 100 entries */
n = pool_elt_at_index (nm->neighbor_pool, index);
nm->neighbor_delete_rotor = index;
index = pool_next_index (nm->neighbor_pool, index);
}
while (n->flags & IP_NEIGHBOR_FLAG_STATIC);
/* Remove ARP entry from its interface and update fib */
adj_nbr_walk_nh6 (n->key.sw_if_index,
&n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
ip6_neighbor_adj_fib_remove
(n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
return n;
}
int
vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm,
u32 sw_if_index,
const ip6_address_t * a,
const mac_address_t * mac,
ip_neighbor_flags_t flags)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_neighbor_key_t k;
ip6_neighbor_t *n = 0;
int make_new_nd_cache_entry = 1;
uword *p;
u32 next_index;
pending_resolution_t *pr, *mc;
if (vlib_get_thread_index ())
{
set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, mac, 1, flags);
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 (!(flags & IP_NEIGHBOR_FLAG_STATIC) &&
(n->flags & IP_NEIGHBOR_FLAG_STATIC))
{
/* if MAC address match, still check to send event */
if (0 == mac_address_cmp (&n->mac, mac))
goto check_customers;
return -2;
}
make_new_nd_cache_entry = 0;
}
if (make_new_nd_cache_entry)
{
if (nm->limit_neighbor_cache_size &&
pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size)
{
n = force_reuse_neighbor_entry ();
if (NULL == n)
return -2;
}
else
{
pool_get (nm->neighbor_pool, n);
memset (n, 0, sizeof (*n));
}
mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool,
/* old value */ 0);
n->key = k;
n->fib_entry_index = FIB_NODE_INDEX_INVALID;
mac_address_copy (&n->mac, mac);
/*
* create the adj-fib. the entry in the FIB table for and to the peer.
*/
if (!(flags & IP_NEIGHBOR_FLAG_NO_FIB_ENTRY))
{
ip6_neighbor_adj_fib_add
(n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index));
}
else
{
n->flags |= IP_NEIGHBOR_FLAG_NO_FIB_ENTRY;
}
}
else
{
/*
* prevent a DoS attack from the data-plane that
* spams us with no-op updates to the MAC address
*/
if (0 == mac_address_cmp (&n->mac, mac))
{
n->time_last_updated = vlib_time_now (vm);
goto check_customers;
}
mac_address_copy (&n->mac, mac);
}
/* Update time stamp and flags. */
n->time_last_updated = vlib_time_now (vm);
if (flags & IP_NEIGHBOR_FLAG_STATIC)
{
n->flags |= IP_NEIGHBOR_FLAG_STATIC;
n->flags &= ~IP_NEIGHBOR_FLAG_DYNAMIC;
}
else
{
n->flags |= IP_NEIGHBOR_FLAG_DYNAMIC;
n->flags &= ~IP_NEIGHBOR_FLAG_STATIC;
}
adj_nbr_walk_nh6 (sw_if_index,
&n->key.ip6_address, ip6_nd_mk_complete_walk, n);
check_customers:
/* Customer(s) waiting for this address to be resolved? */
p = mhash_get (&nm->pending_resolutions_by_address, a);
if (p)
{
next_index = p[0];
while (next_index != (u32) ~ 0)
{
pr = pool_elt_at_index (nm->pending_resolutions, next_index);
vlib_process_signal_event (vm, pr->node_index,
pr->type_opaque, pr->data);
next_index = pr->next_index;
pool_put (nm->pending_resolutions, pr);
}
mhash_unset (&nm->pending_resolutions_by_address, (void *) 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 rv = 1;
mc = pool_elt_at_index (nm->mac_changes, next_index);
/* Call the user's data callback, return 1 to suppress dup events */
if (mc->data_callback)
rv = (mc->data_callback) (mc->data, mac, 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, const ip6_address_t * a)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_neighbor_key_t k;
ip6_neighbor_t *n;
uword *p;
int rv = 0;
if (vlib_get_thread_index ())
{
set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, NULL, 0,
IP_NEIGHBOR_FLAG_NONE);
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]);
adj_nbr_walk_nh6 (sw_if_index,
&n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL);
ip6_neighbor_adj_fib_remove
(n, ip6_fib_table_get_index_for_sw_if_index (sw_if_index));
mhash_unset (&nm->neighbor_index_by_key, &n->key, 0);
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->mac, a->flags);
else
vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr);
}
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_pool (void)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
return nm->neighbor_pool;
}
ip6_neighbor_t *
ip6_neighbors_entries (u32 sw_if_index)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_neighbor_t *n, *ns = NULL;
/* *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;
int verbose = 0;
if (unformat (input, "verbose"))
verbose = 1;
/* 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)
{
/*
* Show the entire table if it's not too big, otherwise just
* show the size of the table.
*/
if (vec_len (ns) < 50)
verbose = 1;
if (verbose)
{
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);
}
}
else
vlib_cli_output
(vm, "There are %u ip6 neighbors, "
"'show ip6 neighbors verbose' to display the entire table...",
vec_len (ns));
vec_free (ns);
}
else
vlib_cli_output (vm, "No ip6 neighbors");
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)
{
ip_neighbor_flags_t flags = IP_NEIGHBOR_FLAG_NONE;
vnet_main_t *vnm = vnet_get_main ();
ip6_address_t addr;
mac_address_t mac;
int addr_valid = 0;
int is_del = 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_mac_address_t, &mac))
addr_valid = 1;
else if (unformat (input, "delete") || unformat (input, "del"))
is_del = 1;
else if (unformat (input, "static"))
flags |= IP_NEIGHBOR_FLAG_STATIC;
else if (unformat (input, "no-fib-entry"))
flags |= IP_NEIGHBOR_FLAG_NO_FIB_ENTRY;
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, flags);
else
vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr);
return 0;
}
/*?
* This command is used to manually add an entry to the IPv6 neighbor
* adjacency table. Optionally, the entry can be added as static. It is
* also used to remove an entry from the table. Use the '<em>show ip6
* neighbors</em>' command to display all learned and manually entered entries.
*
* @cliexpar
* Example of how to add a static entry to the IPv6 neighbor adjacency table:
* @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static}
* Example of how to delete an entry from the IPv6 neighbor adjacency table:
* @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b}
?*/
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) =
{
.path = "set ip6 neighbor",
.function = set_ip6_neighbor,
.short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]",
};
/* *INDENT-ON* */
typedef enum
{
ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP,
ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY,
ICMP6_NEIGHBOR_SOLICITATION_N_NEXT,
} icmp6_neighbor_solicitation_or_advertisement_next_t;
static_always_inline uword
icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame,
uword is_solicitation)
{
vnet_main_t *vnm = vnet_get_main ();
ip6_main_t *im = &ip6_main;
uword n_packets = frame->n_vectors;
u32 *from, *to_next;
u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent;
icmp6_neighbor_discovery_option_type_t option_type;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
int bogus_length;
from = vlib_frame_vector_args (frame);
n_left_from = n_packets;
next_index = node->cached_next_index;
if (node->flags & VLIB_NODE_FLAG_TRACE)
vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
/* stride */ 1,
sizeof (icmp6_input_trace_t));
option_type =
(is_solicitation
? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address
: ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address);
n_advertisements_sent = 0;
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
vlib_buffer_t *p0;
ip6_header_t *ip0;
icmp6_neighbor_solicitation_or_advertisement_header_t *h0;
icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
u32 bi0, options_len0, sw_if_index0, next0, error0;
u32 ip6_sadd_link_local, ip6_sadd_unspecified;
int is_rewrite0;
u32 ni0;
bi0 = to_next[0] = from[0];
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
p0 = vlib_get_buffer (vm, bi0);
ip0 = vlib_buffer_get_current (p0);
h0 = ip6_next_header (ip0);
options_len0 =
clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
error0 = ICMP6_ERROR_NONE;
sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
ip6_sadd_link_local =
ip6_address_is_link_local_unicast (&ip0->src_address);
ip6_sadd_unspecified =
ip6_address_is_unspecified (&ip0->src_address);
/* Check that source address is unspecified, link-local or else on-link. */
if (!ip6_sadd_unspecified && !ip6_sadd_link_local)
{
u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
if (ADJ_INDEX_INVALID != src_adj_index0)
{
ip_adjacency_t *adj0 = adj_get (src_adj_index0);
/* Allow all realistic-looking rewrite adjacencies to pass */
ni0 = adj0->lookup_next_index;
is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) &&
(ni0 < IP6_LOOKUP_N_NEXT);
error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0
|| !is_rewrite0)
?
ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK
: error0);
}
else
{
error0 =
ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK;
}
}
o0 = (void *) (h0 + 1);
o0 = ((options_len0 == 8 && o0->header.type == option_type
&& o0->header.n_data_u64s == 1) ? o0 : 0);
/* If src address unspecified or link local, donot learn neighbor MAC */
if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
!ip6_sadd_unspecified))
{
vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0,
is_solicitation ?
&ip0->src_address :
&h0->target_address,
(mac_address_t *)
o0->ethernet_address,
IP_NEIGHBOR_FLAG_NONE);
}
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
{
if (ip6_address_is_link_local_unicast (&h0->target_address))
{
fei = ip6_fib_table_lookup_exact_match
(ip6_ll_fib_get (sw_if_index0),
&h0->target_address, 128);
}
else
{
fei = ip6_fib_table_lookup_exact_match (fib_index,
&h0->target_address,
128);
}
if (FIB_NODE_INDEX_INVALID == fei)
{
/* The target address is not in the FIB */
error0 =
ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
}
else
{
if (FIB_ENTRY_FLAG_LOCAL &
fib_entry_get_flags_for_source (fei,
FIB_SOURCE_INTERFACE))
{
/* It's an address that belongs to one of our interfaces
* that's good. */
}
else
if (fib_entry_is_sourced
(fei, FIB_SOURCE_IP6_ND_PROXY) ||
fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND))
{
/* The address was added by IPv6 Proxy ND config.
* We should only respond to these if the NS arrived on
* the link that has a matching covering prefix */
}
else
{
error0 =
ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN;
}
}
}
}
if (is_solicitation)
next0 = (error0 != ICMP6_ERROR_NONE
? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP
: ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY);
else
{
next0 = 0;
error0 = error0 == ICMP6_ERROR_NONE ?
ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0;
}
if (is_solicitation && error0 == ICMP6_ERROR_NONE)
{
vnet_sw_interface_t *sw_if0;
ethernet_interface_t *eth_if0;
ethernet_header_t *eth0;
/* dst address is either source address or the all-nodes mcast addr */
if (!ip6_sadd_unspecified)
ip0->dst_address = ip0->src_address;
else
ip6_set_reserved_multicast_address (&ip0->dst_address,
IP6_MULTICAST_SCOPE_link_local,
IP6_MULTICAST_GROUP_ID_all_hosts);
ip0->src_address = h0->target_address;
ip0->hop_limit = 255;
h0->icmp.type = ICMP6_neighbor_advertisement;
sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
eth_if0 =
ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
if (eth_if0 && o0)
{
clib_memcpy (o0->ethernet_address, eth_if0->address, 6);
o0->header.type =
ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
}
h0->advertisement_flags = clib_host_to_net_u32
(ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED
| ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
h0->icmp.checksum = 0;
h0->icmp.checksum =
ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
&bogus_length);
ASSERT (bogus_length == 0);
/* Reuse current MAC header, copy SMAC to DMAC and
* interface MAC to SMAC */
vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0));
eth0 = vlib_buffer_get_current (p0);
clib_memcpy (eth0->dst_address, eth0->src_address, 6);
if (eth_if0)
clib_memcpy (eth0->src_address, eth_if0->address, 6);
/* Setup input and output sw_if_index for packet */
ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0);
vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
vnet_buffer (p0)->sw_if_index[VLIB_RX] =
vnet_main.local_interface_sw_if_index;
n_advertisements_sent++;
}
p0->error = error_node->errors[error0];
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
/* Account for advertisements sent. */
vlib_error_count (vm, error_node->node_index,
ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX,
n_advertisements_sent);
return frame->n_vectors;
}
/* for "syslogging" - use elog for now */
#define foreach_log_level \
_ (DEBUG, "DEBUG") \
_ (INFO, "INFORMATION") \
_ (NOTICE, "NOTICE") \
_ (WARNING, "WARNING") \
_ (ERR, "ERROR") \
_ (CRIT, "CRITICAL") \
_ (ALERT, "ALERT") \
_ (EMERG, "EMERGENCY")
typedef enum
{
#define _(f,s) LOG_##f,
foreach_log_level
#undef _
} log_level_t;
static char *log_level_strings[] = {
#define _(f,s) s,
foreach_log_level
#undef _
};
static int logmask = 1 << LOG_DEBUG;
static void
ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...)
{
/* just use elog for now */
u8 *what;
va_list va;
if ((priority > LOG_EMERG) || !(logmask & (1 << priority)))
return;
va_start (va, fmt);
if (fmt)
{
what = va_format (0, fmt, &va);
ELOG_TYPE_DECLARE (e) =
{
.format = "ip6 nd: (%s): %s",.format_args = "T4T4",};
struct
{
u32 s[2];
} *ed;
ed = ELOG_DATA (&vm->elog_main, e);
ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]);
ed->s[1] = elog_string (&vm->elog_main, (char *) what);
}
va_end (va);
return;
}
clib_error_t *
call_ip6_neighbor_callbacks (void *data,
_vnet_ip6_neighbor_function_list_elt_t * elt)
{
clib_error_t *error = 0;
while (elt)
{
error = elt->fp (data);
if (error)
return error;
elt = elt->next_ip6_neighbor_function;
}
return error;
}
/* ipv6 neighbor discovery - router advertisements */
typedef enum
{
ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
ICMP6_ROUTER_SOLICITATION_N_NEXT,
} icmp6_router_solicitation_or_advertisement_next_t;
static_always_inline uword
icmp6_router_solicitation (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
vnet_main_t *vnm = vnet_get_main ();
ip6_main_t *im = &ip6_main;
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
uword n_packets = frame->n_vectors;
u32 *from, *to_next;
u32 n_left_from, n_left_to_next, next_index;
u32 n_advertisements_sent = 0;
int bogus_length;
icmp6_neighbor_discovery_option_type_t option_type;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
from = vlib_frame_vector_args (frame);
n_left_from = n_packets;
next_index = node->cached_next_index;
if (node->flags & VLIB_NODE_FLAG_TRACE)
vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
/* stride */ 1,
sizeof (icmp6_input_trace_t));
/* source may append his LL address */
option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
vlib_buffer_t *p0;
ip6_header_t *ip0;
ip6_radv_t *radv_info = 0;
icmp6_neighbor_discovery_header_t *h0;
icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0;
u32 bi0, options_len0, sw_if_index0, next0, error0;
u32 is_solicitation = 1, is_dropped = 0;
u32 is_unspecified, is_link_local;
bi0 = to_next[0] = from[0];
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
p0 = vlib_get_buffer (vm, bi0);
ip0 = vlib_buffer_get_current (p0);
h0 = ip6_next_header (ip0);
options_len0 =
clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
is_unspecified = ip6_address_is_unspecified (&ip0->src_address);
is_link_local =
ip6_address_is_link_local_unicast (&ip0->src_address);
error0 = ICMP6_ERROR_NONE;
sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
/* check if solicitation (not from nd_timer node) */
if (ip6_address_is_unspecified (&ip0->dst_address))
is_solicitation = 0;
/* Check that source address is unspecified, link-local or else on-link. */
if (!is_unspecified && !is_link_local)
{
u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0);
if (ADJ_INDEX_INVALID != src_adj_index0)
{
ip_adjacency_t *adj0 = adj_get (src_adj_index0);
error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0
?
ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK
: error0);
}
else
{
error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK;
}
}
/* check for source LL option and process */
o0 = (void *) (h0 + 1);
o0 = ((options_len0 == 8
&& o0->header.type == option_type
&& o0->header.n_data_u64s == 1) ? o0 : 0);
/* if src address unspecified IGNORE any options */
if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 &&
!is_unspecified && !is_link_local))
{
vnet_set_ip6_ethernet_neighbor
(vm, sw_if_index0,
&ip0->src_address,
(mac_address_t *) o0->ethernet_address,
IP_NEIGHBOR_FLAG_NONE);
}
/* default is to drop */
next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
if (error0 == ICMP6_ERROR_NONE)
{
vnet_sw_interface_t *sw_if0;
ethernet_interface_t *eth_if0;
u32 adj_index0;
sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
eth_if0 =
ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
/* only support ethernet interface type for now */
error0 =
(!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
: error0;
if (error0 == ICMP6_ERROR_NONE)
{
u32 ri;
/* adjust the sizeof the buffer to just include the ipv6 header */
p0->current_length -=
(options_len0 +
sizeof (icmp6_neighbor_discovery_header_t));
/* look up the radv_t information for this interface */
if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
sw_if_index0)
{
ri =
nm->if_radv_pool_index_by_sw_if_index[sw_if_index0];
if (ri != ~0)
radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
}
error0 =
((!radv_info) ?
ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
error0);
if (error0 == ICMP6_ERROR_NONE)
{
f64 now = vlib_time_now (vm);
/* for solicited adverts - need to rate limit */
if (is_solicitation)
{
if (0 != radv_info->last_radv_time &&
(now - radv_info->last_radv_time) <
MIN_DELAY_BETWEEN_RAS)
is_dropped = 1;
else
radv_info->last_radv_time = now;
}
/* send now */
icmp6_router_advertisement_header_t rh;
rh.icmp.type = ICMP6_router_advertisement;
rh.icmp.code = 0;
rh.icmp.checksum = 0;
rh.current_hop_limit = radv_info->curr_hop_limit;
rh.router_lifetime_in_sec =
clib_host_to_net_u16
(radv_info->adv_router_lifetime_in_sec);
rh.
time_in_msec_between_retransmitted_neighbor_solicitations
=
clib_host_to_net_u32 (radv_info->
adv_time_in_msec_between_retransmitted_neighbor_solicitations);
rh.neighbor_reachable_time_in_msec =
clib_host_to_net_u32 (radv_info->
adv_neighbor_reachable_time_in_msec);
rh.flags =
(radv_info->adv_managed_flag) ?
ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP :
0;
rh.flags |=
((radv_info->adv_other_flag) ?
ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP :
0);
u16 payload_length =
sizeof (icmp6_router_advertisement_header_t);
if (vlib_buffer_add_data
(vm, &bi0, (void *) &rh,
sizeof (icmp6_router_advertisement_header_t)))
{
/* buffer allocation failed, drop the pkt */
error0 = ICMP6_ERROR_ALLOC_FAILURE;
goto drop0;
}
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);
if (vlib_buffer_add_data
(vm, &bi0, (void *) &h,
sizeof
(icmp6_neighbor_discovery_ethernet_link_layer_address_option_t)))
{
error0 = ICMP6_ERROR_ALLOC_FAILURE;
goto drop0;
}
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);
if (vlib_buffer_add_data
(vm, &bi0, (void *) &h,
sizeof
(icmp6_neighbor_discovery_mtu_option_t)))
{
error0 = ICMP6_ERROR_ALLOC_FAILURE;
goto drop0;
}
}
/* 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_warning ("Prefix %U valid %u preferred %u",
format_ip6_address, &pr_info->prefix,
ntohl(h.valid_time),
ntohl(h.preferred_time));
if (h.valid_time == 0)
clib_warning ("WARNING: valid_time 0!!!");
clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t));
payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t);
if (vlib_buffer_add_data
(vm, &bi0, (void *)&h,
sizeof(icmp6_neighbor_discovery_prefix_information_option_t)))
{
error0 = ICMP6_ERROR_ALLOC_FAILURE;
goto drop0;
}
}
}));
/* *INDENT-ON* */
/* add additional options before here */
/* finish building the router advertisement... */
if (!is_unspecified && radv_info->send_unicast)
{
ip0->dst_address = ip0->src_address;
}
else
{
/* target address is all-nodes mcast addr */
ip6_set_reserved_multicast_address
(&ip0->dst_address,
IP6_MULTICAST_SCOPE_link_local,
IP6_MULTICAST_GROUP_ID_all_hosts);
}
/* source address MUST be the link-local address */
ip0->src_address = radv_info->link_local_address;
ip0->hop_limit = 255;
ip0->payload_length =
clib_host_to_net_u16 (payload_length);
icmp6_router_advertisement_header_t *rh0 =
(icmp6_router_advertisement_header_t *) (ip0 + 1);
rh0->icmp.checksum =
ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0,
&bogus_length);
ASSERT (bogus_length == 0);
/* setup output if and adjacency */
vnet_buffer (p0)->sw_if_index[VLIB_RX] =
vnet_main.local_interface_sw_if_index;
if (is_solicitation)
{
ethernet_header_t *eth0;
/* Reuse current MAC header, copy SMAC to DMAC and
* interface MAC to SMAC */
vlib_buffer_reset (p0);
eth0 = vlib_buffer_get_current (p0);
clib_memcpy (eth0->dst_address, eth0->src_address,
6);
clib_memcpy (eth0->src_address, eth_if0->address,
6);
next0 =
is_dropped ? next0 :
ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX;
vnet_buffer (p0)->sw_if_index[VLIB_TX] =
sw_if_index0;
}
else
{
adj_index0 = radv_info->mcast_adj_index;
if (adj_index0 == 0)
error0 = ICMP6_ERROR_DST_LOOKUP_MISS;
else
{
next0 =
is_dropped ? next0 :
ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW;
vnet_buffer (p0)->ip.adj_index[VLIB_TX] =
adj_index0;
}
}
p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
radv_info->n_solicitations_dropped += is_dropped;
radv_info->n_solicitations_rcvd += is_solicitation;
if ((error0 == ICMP6_ERROR_NONE) && !is_dropped)
{
radv_info->n_advertisements_sent++;
n_advertisements_sent++;
}
}
}
}
drop0:
p0->error = error_node->errors[error0];
if (error0 != ICMP6_ERROR_NONE)
vlib_error_count (vm, error_node->node_index, error0, 1);
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next,
bi0, next0);
}
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
/* Account for router advertisements sent. */
vlib_error_count (vm, error_node->node_index,
ICMP6_ERROR_ROUTER_ADVERTISEMENTS_TX,
n_advertisements_sent);
return frame->n_vectors;
}
/* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */
static_always_inline uword
icmp6_router_advertisement (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
vnet_main_t *vnm = vnet_get_main ();
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
uword n_packets = frame->n_vectors;
u32 *from, *to_next;
u32 n_left_from, n_left_to_next, next_index;
u32 n_advertisements_rcvd = 0;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
from = vlib_frame_vector_args (frame);
n_left_from = n_packets;
next_index = node->cached_next_index;
if (node->flags & VLIB_NODE_FLAG_TRACE)
vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
/* stride */ 1,
sizeof (icmp6_input_trace_t));
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
while (n_left_from > 0 && n_left_to_next > 0)
{
vlib_buffer_t *p0;
ip6_header_t *ip0;
ip6_radv_t *radv_info = 0;
icmp6_router_advertisement_header_t *h0;
u32 bi0, options_len0, sw_if_index0, next0, error0;
bi0 = to_next[0] = from[0];
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
p0 = vlib_get_buffer (vm, bi0);
ip0 = vlib_buffer_get_current (p0);
h0 = ip6_next_header (ip0);
options_len0 =
clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]);
error0 = ICMP6_ERROR_NONE;
sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
/* Check that source address is link-local */
error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ?
ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0;
/* default is to drop */
next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP;
n_advertisements_rcvd++;
if (error0 == ICMP6_ERROR_NONE)
{
vnet_sw_interface_t *sw_if0;
ethernet_interface_t *eth_if0;
sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0);
ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
eth_if0 =
ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
/* only support ethernet interface type for now */
error0 =
(!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF
: error0;
if (error0 == ICMP6_ERROR_NONE)
{
u32 ri;
/* look up the radv_t information for this interface */
if (vec_len (nm->if_radv_pool_index_by_sw_if_index) >
sw_if_index0)
{
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)
{
radv_info->keep_sending_rs = 0;
ra_report_t r;
r.sw_if_index = sw_if_index0;
memcpy (&r.router_address, &ip0->src_address, 16);
r.current_hop_limit = h0->current_hop_limit;
r.flags = h0->flags;
r.router_lifetime_in_sec =
clib_net_to_host_u16 (h0->router_lifetime_in_sec);
r.neighbor_reachable_time_in_msec =
clib_net_to_host_u32
(h0->neighbor_reachable_time_in_msec);
r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations);
r.prefixes = 0;
/* 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_source_link_layer_address:
{
icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
* h =
(icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
*) (o0);
if (opt_len < sizeof (*h))
break;
memcpy (r.slla, h->ethernet_address, 6);
}
break;
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;
r.mtu = clib_net_to_host_u32 (h->mtu);
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;
vec_validate (r.prefixes,
vec_len (r.prefixes));
ra_report_prefix_info_t *prefix =
vec_elt_at_index (r.prefixes,
vec_len (r.prefixes) - 1);
preferred =
clib_net_to_host_u32 (h->preferred_time);
valid = clib_net_to_host_u32 (h->valid_time);
prefix->preferred_time = preferred;
prefix->valid_time = valid;
prefix->flags = h->flags & 0xc0;
prefix->prefix.fp_len = h->dst_address_length;
prefix->prefix.fp_addr.ip6 = h->dst_address;
prefix->prefix.fp_proto = FIB_PROTOCOL_IP6;
/* 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;
}
}
ra_publish (&r);
}
}
}
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 received. */
vlib_error_count (vm, error_node->node_index,
ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX,
n_advertisements_rcvd);
return frame->n_vectors;
}
static inline f64
random_f64_from_to (f64 from, f64 to)
{
static u32 seed = 0;
static u8 seed_set = 0;
if (!seed_set)
{
seed = random_default_seed ();
seed_set = 1;
}
return random_f64 (&seed) * (to - from) + from;
}
static inline u8
get_mac_address (u32 sw_if_index, u8 * address)
{
vnet_main_t *vnm = vnet_get_main ();
vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index);
if (!hw_if->hw_address)
return 1;
clib_memcpy (address, hw_if->hw_address, 6);
return 0;
}
static inline vlib_buffer_t *
create_buffer_for_rs (vlib_main_t * vm, ip6_radv_t * radv_info)
{
u32 bi0;
vlib_buffer_t *p0;
icmp6_router_solicitation_header_t *rh;
u16 payload_length;
int bogus_length;
u32 sw_if_index;
sw_if_index = radv_info->sw_if_index;
if (vlib_buffer_alloc (vm, &bi0, 1) != 1)
{
clib_warning ("buffer allocation failure");
return 0;
}
p0 = vlib_get_buffer (vm, bi0);
VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0);
p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index;
vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index;
vnet_buffer (p0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
rh = vlib_buffer_get_current (p0);
p0->current_length = sizeof (*rh);
rh->neighbor.icmp.type = ICMP6_router_solicitation;
rh->neighbor.icmp.code = 0;
rh->neighbor.icmp.checksum = 0;
rh->neighbor.reserved_must_be_zero = 0;
rh->link_layer_option.header.type =
ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address;
if (0 != get_mac_address (sw_if_index,
rh->link_layer_option.ethernet_address))
{
clib_warning ("interface with sw_if_index %u has no mac address",
sw_if_index);
vlib_buffer_free (vm, &bi0, 1);
return 0;
}
rh->link_layer_option.header.n_data_u64s = 1;
payload_length = sizeof (rh->neighbor) + sizeof (u64);
rh->ip.ip_version_traffic_class_and_flow_label =
clib_host_to_net_u32 (0x6 << 28);
rh->ip.payload_length = clib_host_to_net_u16 (payload_length);
rh->ip.protocol = IP_PROTOCOL_ICMP6;
rh->ip.hop_limit = 255;
rh->ip.src_address = radv_info->link_local_address;
/* set address ff02::2 */
rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02ULL << 48);
rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2);
rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0,
&rh->ip,
&bogus_length);
return p0;
}
static inline void
stop_sending_rs (vlib_main_t * vm, ip6_radv_t * ra)
{
u32 bi0;
ra->keep_sending_rs = 0;
if (ra->buffer)
{
bi0 = vlib_get_buffer_index (vm, ra->buffer);
vlib_buffer_free (vm, &bi0, 1);
ra->buffer = 0;
}
}
static inline bool
check_send_rs (vlib_main_t * vm, ip6_radv_t * radv_info, f64 current_time,
f64 * due_time)
{
vlib_buffer_t *p0;
vlib_frame_t *f;
u32 *to_next;
u32 next_index;
vlib_buffer_t *c0;
u32 ci0;
icmp6_send_router_solicitation_params_t *params;
if (!radv_info->keep_sending_rs)
return false;
params = &radv_info->params;
if (radv_info->due_time > current_time)
{
*due_time = radv_info->due_time;
return true;
}
p0 = radv_info->buffer;
next_index = ip6_rewrite_mcast_node.index;
c0 = vlib_buffer_copy (vm, p0);
ci0 = vlib_get_buffer_index (vm, c0);
f = vlib_get_frame_to_node (vm, next_index);
to_next = vlib_frame_vector_args (f);
to_next[0] = ci0;
f->n_vectors = 1;
vlib_put_frame_to_node (vm, next_index, f);
if (params->mrc != 0 && --radv_info->n_left == 0)
stop_sending_rs (vm, radv_info);
else
{
radv_info->sleep_interval =
(2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval;
if (radv_info->sleep_interval > params->mrt)
radv_info->sleep_interval =
(1 + random_f64_from_to (-0.1, 0.1)) * params->mrt;
radv_info->due_time = current_time + radv_info->sleep_interval;
if (params->mrd != 0
&& current_time > radv_info->start_time + params->mrd)
stop_sending_rs (vm, radv_info);
else
*due_time = radv_info->due_time;
}
return radv_info->keep_sending_rs;
}
static uword
send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
vlib_frame_t * f0)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_radv_t *radv_info;
uword *event_data = 0;
f64 sleep_time = 1e9;
f64 current_time;
f64 due_time;
f64 dt = 0;
while (true)
{
vlib_process_wait_for_event_or_clock (vm, sleep_time);
vlib_process_get_events (vm, &event_data);
vec_reset_length (event_data);
current_time = vlib_time_now (vm);
do
{
due_time = current_time + 1e9;
/* *INDENT-OFF* */
pool_foreach (radv_info, nm->if_radv_pool,
({
if (check_send_rs (vm, radv_info, current_time, &dt)
&& (dt < due_time))
due_time = dt;
}));
/* *INDENT-ON* */
current_time = vlib_time_now (vm);
}
while (due_time < current_time);
sleep_time = due_time - current_time;
}
return 0;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (send_rs_process_node) = {
.function = send_rs_process,
.type = VLIB_NODE_TYPE_PROCESS,
.name = "send-rs-process",
};
/* *INDENT-ON* */
void
icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
icmp6_send_router_solicitation_params_t *
params)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
u32 rai;
ip6_radv_t *ra = 0;
ASSERT (~0 != sw_if_index);
rai = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
ra = pool_elt_at_index (nm->if_radv_pool, rai);
stop_sending_rs (vm, ra);
if (!stop)
{
ra->keep_sending_rs = 1;
ra->params = *params;
ra->n_left = params->mrc;
ra->start_time = vlib_time_now (vm);
ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt;
ra->due_time = 0; /* send first packet ASAP */
ra->buffer = create_buffer_for_rs (vm, ra);
if (!ra->buffer)
ra->keep_sending_rs = 0;
else
vlib_process_signal_event (vm, send_rs_process_node.index, 1, 0);
}
}
/**
* @brief Add a multicast Address to the advertised MLD set
*/
static void
ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
{
ip6_mldp_group_t *mcast_group_info;
uword *p;
/* lookup mldp info for this interface */
p = mhash_get (&radv_info->address_to_mldp_index, addr);
mcast_group_info =
p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
/* add address */
if (!mcast_group_info)
{
/* add */
u32 mi;
pool_get (radv_info->mldp_group_pool, mcast_group_info);
memset (mcast_group_info, 0, sizeof (*mcast_group_info));
mi = mcast_group_info - radv_info->mldp_group_pool;
mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */
0);
mcast_group_info->type = 4;
mcast_group_info->mcast_source_address_pool = 0;
mcast_group_info->num_sources = 0;
clib_memcpy (&mcast_group_info->mcast_address, addr,
sizeof (ip6_address_t));
}
}
/**
* @brief Delete a multicast Address from the advertised MLD set
*/
static void
ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr)
{
ip6_mldp_group_t *mcast_group_info;
uword *p;
p = mhash_get (&radv_info->address_to_mldp_index, &addr);
mcast_group_info =
p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0;
if (mcast_group_info)
{
mhash_unset (&radv_info->address_to_mldp_index, &addr,
/* old_value */ 0);
pool_put (radv_info->mldp_group_pool, mcast_group_info);
}
}
/**
* @brief Add a multicast Address to the advertised MLD set
*/
static void
ip6_neighbor_add_mld_grp (ip6_radv_t * a,
ip6_multicast_address_scope_t scope,
ip6_multicast_link_local_group_id_t group)
{
ip6_address_t addr;
ip6_set_reserved_multicast_address (&addr, scope, group);
ip6_neighbor_add_mld_prefix (a, &addr);
}
/**
* @brief create and initialize router advertisement parameters with default
* values for this intfc
*/
u32
ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm,
u32 sw_if_index, u32 is_add)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_radv_t *a = 0;
u32 ri = ~0;
vnet_sw_interface_t *sw_if0;
ethernet_interface_t *eth_if0 = 0;
/* lookup radv container - ethernet interfaces only */
sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
eth_if0 = ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
if (!eth_if0)
return ri;
vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
~0);
ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
if (ri != ~0)
{
a = pool_elt_at_index (nm->if_radv_pool, ri);
if (!is_add)
{
ip6_radv_prefix_t *p;
ip6_mldp_group_t *m;
/* release the lock on the interface's mcast adj */
adj_unlock (a->mcast_adj_index);
/* clean up prefix and MDP pools */
/* *INDENT-OFF* */
pool_flush(p, a->adv_prefixes_pool,
({
mhash_unset (&a->address_to_prefix_index, &p->prefix, 0);
}));
pool_flush (m, a->mldp_group_pool,
({
mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0);
}));
/* *INDENT-ON* */
pool_free (a->mldp_group_pool);
pool_free (a->adv_prefixes_pool);
mhash_free (&a->address_to_prefix_index);
mhash_free (&a->address_to_mldp_index);
if (a->keep_sending_rs)
a->keep_sending_rs = 0;
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)
{
pool_get (nm->if_radv_pool, a);
memset (a, 0, sizeof (*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) */
clib_memset (a, 0, sizeof (a[0]));
a->sw_if_index = sw_if_index;
a->max_radv_interval = DEF_MAX_RADV_INTERVAL;
a->min_radv_interval = DEF_MIN_RADV_INTERVAL;
a->curr_hop_limit = DEF_CURR_HOP_LIMIT;
a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
/* send ll address source address option */
a->adv_link_layer_address = 1;
a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
a->seed = (u32) clib_cpu_time_now ();
(void) random_u32 (&a->seed);
a->randomizer = clib_cpu_time_now ();
(void) random_u64 (&a->randomizer);
a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
a->initial_adverts_sent = a->initial_adverts_count - 1;
a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
/* deafult is to send */
a->send_radv = 1;
/* fill in radv_info for this interface that will be needed later */
a->adv_link_mtu =
vnet_sw_interface_get_mtu (vnm, sw_if_index, VNET_MTU_IP6);
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_mac_address
(&a->link_local_address, eth_if0->address);
mhash_init (&a->address_to_prefix_index, sizeof (uword),
sizeof (ip6_address_t));
mhash_init (&a->address_to_mldp_index, sizeof (uword),
sizeof (ip6_address_t));
a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6,
VNET_LINK_IP6,
sw_if_index);
a->keep_sending_rs = 0;
/* add multicast groups we will always be reporting */
ip6_neighbor_add_mld_grp (a,
IP6_MULTICAST_SCOPE_link_local,
IP6_MULTICAST_GROUP_ID_all_hosts);
ip6_neighbor_add_mld_grp (a,
IP6_MULTICAST_SCOPE_link_local,
IP6_MULTICAST_GROUP_ID_all_routers);
ip6_neighbor_add_mld_grp (a,
IP6_MULTICAST_SCOPE_link_local,
IP6_MULTICAST_GROUP_ID_mldv2_routers);
}
}
return ri;
}
/* send an mldpv2 report */
static void
ip6_neighbor_send_mldpv2_report (u32 sw_if_index)
{
vnet_main_t *vnm = vnet_get_main ();
vlib_main_t *vm = vnm->vlib_main;
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
vnet_sw_interface_t *sw_if0;
ethernet_interface_t *eth_if0;
u32 ri;
int bogus_length;
ip6_radv_t *radv_info;
u16 payload_length;
vlib_buffer_t *b0;
ip6_header_t *ip0;
u32 *to_next;
vlib_frame_t *f;
u32 bo0;
u32 n_to_alloc = 1;
u32 n_allocated;
icmp6_multicast_listener_report_header_t *rh0;
icmp6_multicast_listener_report_packet_t *rp0;
sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE);
eth_if0 = ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index))
return;
/* look up the radv_t information for this interface */
vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
~0);
ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
if (ri == ~0)
return;
/* send report now - build a mldpv2 report packet */
n_allocated = vlib_buffer_alloc (vm, &bo0, n_to_alloc);
if (PREDICT_FALSE (n_allocated == 0))
{
alloc_fail:
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;
clib_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++;
if(vlib_buffer_add_data (vm, &bo0, (void *)&rr,
sizeof(icmp6_multicast_address_record_t)))
{
vlib_buffer_free (vm, &bo0, 1);
goto alloc_fail;
}
payload_length += sizeof( icmp6_multicast_address_record_t);
}));
/* *INDENT-ON* */
rh0->rsvd = 0;
rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records);
/* update lengths */
ip0->payload_length = clib_host_to_net_u16 (payload_length);
rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0,
&bogus_length);
ASSERT (bogus_length == 0);
/*
* OK to override w/ no regard for actual FIB, because
* ip6-rewrite only looks at the adjacency.
*/
vnet_buffer (b0)->sw_if_index[VLIB_RX] =
vnet_main.local_interface_sw_if_index;
vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index;
b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast");
f = vlib_get_frame_to_node (vm, node->index);
to_next = vlib_frame_vector_args (f);
to_next[0] = bo0;
f->n_vectors = 1;
vlib_put_frame_to_node (vm, node->index, f);
return;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) =
{
.function = icmp6_router_solicitation,
.name = "icmp6-router-solicitation",
.vector_size = sizeof (u32),
.format_trace = format_icmp6_input_trace,
.n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT,
.next_nodes = {
[ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop",
[ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast",
[ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output",
},
};
/* *INDENT-ON* */
/* send a RA or update the timer info etc.. */
static uword
ip6_neighbor_process_timer_event (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame)
{
vnet_main_t *vnm = vnet_get_main ();
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_radv_t *radv_info;
vlib_frame_t *f = 0;
u32 n_this_frame = 0;
u32 n_left_to_next = 0;
u32 *to_next = 0;
u32 bo0;
icmp6_router_solicitation_header_t *h0;
vlib_buffer_t *b0;
f64 now = vlib_time_now (vm);
/* Interface ip6 radv info list */
/* *INDENT-OFF* */
pool_foreach (radv_info, nm->if_radv_pool,
({
if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index))
{
radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1;
radv_info->next_multicast_time = now;
radv_info->last_multicast_time = now;
radv_info->last_radv_time = 0;
radv_info->all_routers_mcast = 0;
continue;
}
/* Make sure that we've joined the all-routers multicast group */
if(!radv_info->all_routers_mcast)
{
/* send MDLP_REPORT_EVENT message */
ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index);
radv_info->all_routers_mcast = 1;
}
/* is it time to send a multicast RA on this interface? */
if(radv_info->send_radv && (now >= radv_info->next_multicast_time))
{
u32 n_to_alloc = 1;
u32 n_allocated;
f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) *
random_f64 (&radv_info->seed) + radv_info->min_radv_interval;
/* multicast send - compute next multicast send time */
if( radv_info->initial_adverts_sent > 0)
{
radv_info->initial_adverts_sent--;
if(rfn > radv_info-> initial_adverts_interval)
rfn = radv_info-> initial_adverts_interval;
/* check to see if we are ceasing to send */
if( radv_info->initial_adverts_sent == 0)
if(radv_info->cease_radv)
radv_info->send_radv = 0;
}
radv_info->next_multicast_time = rfn + now;
radv_info->last_multicast_time = now;
/* send advert now - build a "solicted" router advert with unspecified source address */
n_allocated = vlib_buffer_alloc (vm, &bo0, n_to_alloc);
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);
clib_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] = "ip6-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] = "ip6-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] = "ip6-drop",
},
};
/* *INDENT-ON* */
typedef enum
{
IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX,
IP6_DISCOVER_NEIGHBOR_N_NEXT,
} ip6_discover_neighbor_next_t;
typedef enum
{
IP6_DISCOVER_NEIGHBOR_ERROR_DROP,
IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT,
IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS,
} ip6_discover_neighbor_error_t;
static uword
ip6_discover_neighbor_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * frame, int is_glean)
{
vnet_main_t *vnm = vnet_get_main ();
ip6_main_t *im = &ip6_main;
ip_lookup_main_t *lm = &im->lookup_main;
u32 *from, *to_next_drop;
uword n_left_from, n_left_to_next_drop;
u64 seed;
u32 thread_index = vm->thread_index;
int bogus_length;
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
if (node->flags & VLIB_NODE_FLAG_TRACE)
ip6_forward_next_trace (vm, node, frame, VLIB_TX);
seed = throttle_seed (&im->nd_throttle, thread_index, vlib_time_now (vm));
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
while (n_left_from > 0)
{
vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
to_next_drop, n_left_to_next_drop);
while (n_left_from > 0 && n_left_to_next_drop > 0)
{
u32 pi0, adj_index0, sw_if_index0, drop0, r0, next0;
vnet_hw_interface_t *hw_if0;
ip6_radv_t *radv_info;
ip_adjacency_t *adj0;
vlib_buffer_t *p0;
ip6_header_t *ip0;
pi0 = from[0];
p0 = vlib_get_buffer (vm, pi0);
adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX];
ip0 = vlib_buffer_get_current (p0);
adj0 = adj_get (adj_index0);
if (!is_glean)
{
ip0->dst_address.as_u64[0] =
adj0->sub_type.nbr.next_hop.ip6.as_u64[0];
ip0->dst_address.as_u64[1] =
adj0->sub_type.nbr.next_hop.ip6.as_u64[1];
}
sw_if_index0 = adj0->rewrite_header.sw_if_index;
vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
/* combine the address and interface for a hash */
r0 = ip6_address_hash_to_u64 (&ip0->dst_address) ^ sw_if_index0;
drop0 = throttle_check (&im->nd_throttle, thread_index, r0, seed);
from += 1;
n_left_from -= 1;
to_next_drop[0] = pi0;
to_next_drop += 1;
n_left_to_next_drop -= 1;
hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
/* If the interface is link-down, drop the pkt */
if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
drop0 = 1;
if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index0)
{
u32 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);
else
drop0 = 1;
}
else
drop0 = 1;
/*
* the adj has been updated to a rewrite but the node the DPO that got
* us here hasn't - yet. no big deal. we'll drop while we wait.
*/
if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index)
drop0 = 1;
p0->error =
node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP
: IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT];
if (drop0)
continue;
{
u32 bi0 = 0;
icmp6_neighbor_solicitation_header_t *h0;
vlib_buffer_t *b0;
h0 = vlib_packet_template_get_packet
(vm, &im->discover_neighbor_packet_template, &bi0);
if (!h0)
continue;
/* copy the persistent fields from the original */
b0 = vlib_get_buffer (vm, bi0);
clib_memcpy_fast (b0->opaque2, p0->opaque2, sizeof (p0->opaque2));
/*
* Build ethernet header.
* Choose source address based on destination lookup
* adjacency.
*/
if (!ip6_src_address_for_packet (lm,
sw_if_index0,
&ip0->dst_address,
&h0->ip.src_address))
{
/* There is no address on the interface */
p0->error =
node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS];
vlib_buffer_free (vm, &bi0, 1);
continue;
}
/*
* Destination address is a solicited node multicast address.
* We need to fill in
* the low 24 bits with low 24 bits of target's address.
*/
h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13];
h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14];
h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15];
h0->neighbor.target_address = ip0->dst_address;
clib_memcpy (h0->link_layer_option.ethernet_address,
hw_if0->hw_address, vec_len (hw_if0->hw_address));
/* $$$$ appears we need this; why is the checksum non-zero? */
h0->neighbor.icmp.checksum = 0;
h0->neighbor.icmp.checksum =
ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip,
&bogus_length);
ASSERT (bogus_length == 0);
vlib_buffer_copy_trace_flag (vm, p0, bi0);
vnet_buffer (b0)->sw_if_index[VLIB_TX]
= vnet_buffer (p0)->sw_if_index[VLIB_TX];
vnet_buffer (b0)->ip.adj_index[VLIB_TX] =
radv_info->mcast_adj_index;
b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED;
next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX;
vlib_set_next_frame_buffer (vm, node, next0, bi0);
}
}
vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP,
n_left_to_next_drop);
}
return frame->n_vectors;
}
static uword
ip6_discover_neighbor (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
return (ip6_discover_neighbor_inline (vm, node, frame, 0));
}
static uword
ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
{
return (ip6_discover_neighbor_inline (vm, node, frame, 1));
}
static char *ip6_discover_neighbor_error_strings[] = {
[IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops",
[IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent",
[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]
= "no source address for ND solicitation",
};
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_glean_node) =
{
.function = ip6_glean,
.name = "ip6-glean",
.vector_size = sizeof (u32),
.format_trace = format_ip6_forward_next_trace,
.n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
.error_strings = ip6_discover_neighbor_error_strings,
.n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
.next_nodes =
{
[IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
[IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
},
};
VLIB_REGISTER_NODE (ip6_discover_neighbor_node) =
{
.function = ip6_discover_neighbor,
.name = "ip6-discover-neighbor",
.vector_size = sizeof (u32),
.format_trace = format_ip6_forward_next_trace,
.n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings),
.error_strings = ip6_discover_neighbor_error_strings,
.n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT,
.next_nodes =
{
[IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop",
[IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast",
},
};
/* *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);
memset (prefix, 0, sizeof (*prefix));
pi = prefix - radv_info->adv_prefixes_pool;
mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
/* old_value */ 0);
clib_memset (prefix, 0x0, sizeof (ip6_radv_prefix_t));
prefix->prefix_len = prefix_len;
clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t));
/* initialize default values */
prefix->adv_on_link_flag = 1; /* L bit set */
prefix->adv_autonomous_flag = 1; /* A bit set */
prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME;
prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME;
prefix->enabled = 1;
prefix->decrement_lifetime_flag = 1;
prefix->deprecated_prefix_flag = 1;
if (off_link == 0)
{
/* FIXME - Should the DP do this or the CP ? */
/* insert prefix into routing table as a connected prefix */
}
if (use_default)
goto restart;
}
else
{
if (prefix->prefix_len != prefix_len)
return VNET_API_ERROR_INVALID_VALUE_2;
if (off_link != 0)
{
/* FIXME - Should the DP do this or the CP ? */
/* remove from routing table if already there */
}
}
if ((val_lifetime == ~0) || (pref_lifetime == ~0))
{
prefix->adv_valid_lifetime_in_secs = ~0;
prefix->adv_pref_lifetime_in_secs = ~0;
prefix->decrement_lifetime_flag = 0;
}
else
{
prefix->adv_valid_lifetime_in_secs = val_lifetime;;
prefix->adv_pref_lifetime_in_secs = pref_lifetime;
}
/* copy remaining */
prefix->enabled = !(no_advertise != 0);
prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0));
prefix->adv_autonomous_flag = !(no_autoconfig != 0);
restart:
/* restart */
/* fill in the expiration times */
prefix->valid_lifetime_expires =
now + prefix->adv_valid_lifetime_in_secs;
prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs;
radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
radv_info->next_multicast_time = vlib_time_now (vm);
radv_info->last_multicast_time = vlib_time_now (vm);
radv_info->last_radv_time = 0;
}
return (error);
}
clib_error_t *
ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input,
vlib_cli_command_t * cmd)
{
vnet_main_t *vnm = vnet_get_main ();
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
clib_error_t *error = 0;
u8 is_no = 0;
u8 suppress = 0, managed = 0, other = 0;
u8 suppress_ll_option = 0, send_unicast = 0, cease = 0;
u8 use_lifetime = 0;
u32 sw_if_index, ra_lifetime = 0, ra_initial_count =
0, ra_initial_interval = 0;
u32 ra_max_interval = 0, ra_min_interval = 0;
unformat_input_t _line_input, *line_input = &_line_input;
vnet_sw_interface_t *sw_if0;
int add_radv_info = 1;
__attribute__ ((unused)) ip6_radv_t *radv_info = 0;
ip6_address_t ip6_addr;
u32 addr_len;
/* Get a line of input. */
if (!unformat_user (main_input, unformat_line_input, line_input))
return 0;
/* get basic radv info for this interface */
if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat_user (line_input,
unformat_vnet_sw_interface, vnm, &sw_if_index))
{
u32 ri;
ethernet_interface_t *eth_if0 = 0;
sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
eth_if0 =
ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
if (!eth_if0)
{
error =
clib_error_return (0, "Interface must be of ethernet type");
goto done;
}
/* look up the radv_t information for this interface */
vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
sw_if_index, ~0);
ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
if (ri != ~0)
{
radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
}
else
{
error = clib_error_return (0, "unknown interface %U'",
format_unformat_error, line_input);
goto done;
}
}
else
{
error = clib_error_return (0, "invalid interface name %U'",
format_unformat_error, line_input);
goto done;
}
}
/* get the rest of the command */
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (line_input, "no"))
is_no = 1;
else if (unformat (line_input, "prefix %U/%d",
unformat_ip6_address, &ip6_addr, &addr_len))
{
add_radv_info = 0;
break;
}
else if (unformat (line_input, "ra-managed-config-flag"))
{
managed = 1;
break;
}
else if (unformat (line_input, "ra-other-config-flag"))
{
other = 1;
break;
}
else if (unformat (line_input, "ra-suppress") ||
unformat (line_input, "ra-surpress"))
{
suppress = 1;
break;
}
else if (unformat (line_input, "ra-suppress-link-layer") ||
unformat (line_input, "ra-surpress-link-layer"))
{
suppress_ll_option = 1;
break;
}
else if (unformat (line_input, "ra-send-unicast"))
{
send_unicast = 1;
break;
}
else if (unformat (line_input, "ra-lifetime"))
{
if (!unformat (line_input, "%d", &ra_lifetime))
{
error = unformat_parse_error (line_input);
goto done;
}
use_lifetime = 1;
break;
}
else if (unformat (line_input, "ra-initial"))
{
if (!unformat
(line_input, "%d %d", &ra_initial_count, &ra_initial_interval))
{
error = unformat_parse_error (line_input);
goto done;
}
break;
}
else if (unformat (line_input, "ra-interval"))
{
if (!unformat (line_input, "%d", &ra_max_interval))
{
error = unformat_parse_error (line_input);
goto done;
}
if (!unformat (line_input, "%d", &ra_min_interval))
ra_min_interval = 0;
break;
}
else if (unformat (line_input, "ra-cease"))
{
cease = 1;
break;
}
else
{
error = unformat_parse_error (line_input);
goto done;
}
}
if (add_radv_info)
{
ip6_neighbor_ra_config (vm, sw_if_index,
suppress, managed, other,
suppress_ll_option, send_unicast, cease,
use_lifetime, ra_lifetime,
ra_initial_count, ra_initial_interval,
ra_max_interval, ra_min_interval, is_no);
}
else
{
u32 valid_lifetime_in_secs = 0;
u32 pref_lifetime_in_secs = 0;
u8 use_prefix_default_values = 0;
u8 no_advertise = 0;
u8 off_link = 0;
u8 no_autoconfig = 0;
u8 no_onlink = 0;
/* get the rest of the command */
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (line_input, "default"))
{
use_prefix_default_values = 1;
break;
}
else if (unformat (line_input, "infinite"))
{
valid_lifetime_in_secs = ~0;
pref_lifetime_in_secs = ~0;
break;
}
else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs,
&pref_lifetime_in_secs))
break;
else
break;
}
/* get the rest of the command */
while (!use_prefix_default_values &&
unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (line_input, "no-advertise"))
no_advertise = 1;
else if (unformat (line_input, "off-link"))
off_link = 1;
else if (unformat (line_input, "no-autoconfig"))
no_autoconfig = 1;
else if (unformat (line_input, "no-onlink"))
no_onlink = 1;
else
{
error = unformat_parse_error (line_input);
goto done;
}
}
ip6_neighbor_ra_prefix (vm, sw_if_index,
&ip6_addr, addr_len,
use_prefix_default_values,
valid_lifetime_in_secs,
pref_lifetime_in_secs,
no_advertise,
off_link, no_autoconfig, no_onlink, is_no);
}
done:
unformat_free (line_input);
return error;
}
static void
ip6_print_addrs (vlib_main_t * vm, u32 * addrs)
{
ip_lookup_main_t *lm = &ip6_main.lookup_main;
u32 i;
for (i = 0; i < vec_len (addrs); i++)
{
ip_interface_address_t *a =
pool_elt_at_index (lm->if_address_pool, addrs[i]);
ip6_address_t *address = ip_interface_address_get_address (lm, a);
vlib_cli_output (vm, "\t\t%U/%d",
format_ip6_address, address, a->address_length);
}
}
static clib_error_t *
show_ip6_interface_cmd (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
vnet_main_t *vnm = vnet_get_main ();
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
clib_error_t *error = 0;
u32 sw_if_index;
sw_if_index = ~0;
if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
{
u32 ri;
/* look up the radv_t information for this interface */
vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
sw_if_index, ~0);
ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
if (ri != ~0)
{
ip_lookup_main_t *lm = &ip6_main.lookup_main;
ip6_radv_t *radv_info;
radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
vlib_cli_output (vm, "%U is admin %s\n",
format_vnet_sw_interface_name, vnm,
vnet_get_sw_interface (vnm, sw_if_index),
(vnet_sw_interface_is_admin_up (vnm, sw_if_index) ?
"up" : "down"));
u32 ai;
u32 *link_scope = 0, *global_scope = 0;
u32 *local_scope = 0, *unknown_scope = 0;
ip_interface_address_t *a;
vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index,
sw_if_index, ~0);
ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index];
while (ai != (u32) ~ 0)
{
a = pool_elt_at_index (lm->if_address_pool, ai);
ip6_address_t *address =
ip_interface_address_get_address (lm, a);
if (ip6_address_is_link_local_unicast (address))
vec_add1 (link_scope, ai);
else if (ip6_address_is_global_unicast (address))
vec_add1 (global_scope, ai);
else if (ip6_address_is_local_unicast (address))
vec_add1 (local_scope, ai);
else
vec_add1 (unknown_scope, ai);
ai = a->next_this_sw_interface;
}
if (vec_len (link_scope))
{
vlib_cli_output (vm, "\tLink-local address(es):\n");
ip6_print_addrs (vm, link_scope);
vec_free (link_scope);
}
if (vec_len (local_scope))
{
vlib_cli_output (vm, "\tLocal unicast address(es):\n");
ip6_print_addrs (vm, local_scope);
vec_free (local_scope);
}
if (vec_len (global_scope))
{
vlib_cli_output (vm, "\tGlobal unicast address(es):\n");
ip6_print_addrs (vm, global_scope);
vec_free (global_scope);
}
if (vec_len (unknown_scope))
{
vlib_cli_output (vm, "\tOther-scope address(es):\n");
ip6_print_addrs (vm, unknown_scope);
vec_free (unknown_scope);
}
vlib_cli_output (vm, "\tLink-local address(es):\n");
vlib_cli_output (vm, "\t\t%U\n", format_ip6_address,
&radv_info->link_local_address);
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)
{
ip6_radv_t *radv_info;
radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
/* check radv_info ref count for other ip6 addresses on this interface */
/* This implicitly excludes the link local address */
if (radv_info->ref_count == 0)
{
/* essentially "disables" ipv6 on this interface */
ip6_ll_prefix_t ilp = {
.ilp_addr = radv_info->link_local_address,
.ilp_sw_if_index = sw_if_index,
};
ip6_ll_table_entry_delete (&ilp);
ip6_sw_interface_enable_disable (sw_if_index, 0);
ip6_mfib_interface_enable_disable (sw_if_index, 0);
ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index,
0);
}
}
return error;
}
int
ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
u32 ri = ~0;
/* look up the radv_t information for this interface */
vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
~0);
ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
return ri != ~0;
}
clib_error_t *
enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index)
{
clib_error_t *error = 0;
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
u32 ri;
int is_add = 1;
/* look up the radv_t information for this interface */
vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index,
~0);
ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
/* if not created yet */
if (ri == ~0)
{
vnet_main_t *vnm = vnet_get_main ();
vnet_sw_interface_t *sw_if0;
sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index);
if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
{
ethernet_interface_t *eth_if0;
eth_if0 =
ethernet_get_interface (&ethernet_main, sw_if0->hw_if_index);
if (eth_if0)
{
/* create radv_info. for this interface. This holds all the info needed for router adverts */
ri =
ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add);
if (ri != ~0)
{
ip6_radv_t *radv_info;
ip6_address_t link_local_address;
radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
ip6_link_local_address_from_ethernet_mac_address
(&link_local_address, eth_if0->address);
sw_if0 = vnet_get_sw_interface (vnm, sw_if_index);
if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB ||
sw_if0->type == VNET_SW_INTERFACE_TYPE_PIPE ||
sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P)
{
/* make up an interface id */
link_local_address.as_u64[1] =
random_u64 (&radv_info->randomizer);
link_local_address.as_u64[0] =
clib_host_to_net_u64 (0xFE80000000000000ULL);
/* clear u bit */
link_local_address.as_u8[8] &= 0xfd;
}
{
ip6_ll_prefix_t ilp = {
.ilp_addr = link_local_address,
.ilp_sw_if_index = sw_if_index,
};
ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL);
}
/* essentially "enables" ipv6 on this interface */
ip6_mfib_interface_enable_disable (sw_if_index, 1);
ip6_sw_interface_enable_disable (sw_if_index, 1);
if (!error)
{
radv_info->link_local_address = link_local_address;
}
}
}
}
}
return error;
}
int
ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_radv_t *radv_info;
u32 ri;
if (vec_len (nm->if_radv_pool_index_by_sw_if_index) <= sw_if_index)
return 0;
ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
if (ri == ~0)
return 0;
radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
*addr = radv_info->link_local_address;
return (!0);
}
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 *
ip6_neighbor_set_link_local_address (vlib_main_t * vm, u32 sw_if_index,
ip6_address_t * address)
{
clib_error_t *error = 0;
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
u32 ri;
ip6_radv_t *radv_info;
vnet_main_t *vnm = vnet_get_main ();
ip6_ll_prefix_t pfx = { 0, };
if (!ip6_address_is_link_local_unicast (address))
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);
pfx.ilp_sw_if_index = sw_if_index;
pfx.ilp_addr = radv_info->link_local_address;
ip6_ll_table_entry_delete (&pfx);
pfx.ilp_addr = *address;
ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_LOCAL);
radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
radv_info->link_local_address = *address;
}
else
{
vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED;
error = clib_error_return (0, "ip6 not enabled for interface",
format_unformat_error);
}
return error;
}
/**
* @brief callback when an interface address is added or deleted
*/
static void
ip6_neighbor_add_del_interface_address (ip6_main_t * im,
uword opaque,
u32 sw_if_index,
ip6_address_t * address,
u32 address_length,
u32 if_address_index, u32 is_delete)
{
vnet_main_t *vnm = vnet_get_main ();
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
u32 ri;
vlib_main_t *vm = vnm->vlib_main;
ip6_radv_t *radv_info;
ip6_address_t a;
/* create solicited node multicast address for this interface address */
ip6_set_solicited_node_multicast_address (&a, 0);
a.as_u8[0xd] = address->as_u8[0xd];
a.as_u8[0xe] = address->as_u8[0xe];
a.as_u8[0xf] = address->as_u8[0xf];
if (!is_delete)
{
/* try to create radv_info - does nothing if ipv6 already enabled */
enable_ip6_interface (vm, sw_if_index);
/* look up the radv_t information for this interface */
vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
sw_if_index, ~0);
ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
if (ri != ~0)
{
/* get radv_info */
radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
/* add address */
if (!ip6_address_is_link_local_unicast (address))
radv_info->ref_count++;
ip6_neighbor_add_mld_prefix (radv_info, &a);
}
}
else
{
/* delete */
/* look up the radv_t information for this interface */
vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index,
sw_if_index, ~0);
ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index];
if (ri != ~0)
{
/* get radv_info */
radv_info = pool_elt_at_index (nm->if_radv_pool, ri);
ip6_neighbor_del_mld_prefix (radv_info, &a);
/* if interface up send MLDP "report" */
radv_info->all_routers_mcast = 0;
/* add address */
if (!ip6_address_is_link_local_unicast (address))
radv_info->ref_count--;
}
/* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */
disable_ip6_interface (vm, sw_if_index);
}
}
clib_error_t *
ip6_set_neighbor_limit (u32 neighbor_limit)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
nm->limit_neighbor_cache_size = neighbor_limit;
return 0;
}
static void
ip6_neighbor_table_bind (ip6_main_t * im,
uword opaque,
u32 sw_if_index,
u32 new_fib_index, u32 old_fib_index)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_neighbor_t *n = NULL;
u32 i, *to_re_add = 0;
/* *INDENT-OFF* */
pool_foreach (n, nm->neighbor_pool,
({
if (n->key.sw_if_index == sw_if_index)
vec_add1 (to_re_add, n - nm->neighbor_pool);
}));
/* *INDENT-ON* */
for (i = 0; i < vec_len (to_re_add); i++)
{
n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]);
ip6_neighbor_adj_fib_remove (n, old_fib_index);
ip6_neighbor_adj_fib_add (n, new_fib_index);
}
vec_free (to_re_add);
}
static clib_error_t *
ip6_neighbor_init (vlib_main_t * vm)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_main_t *im = &ip6_main;
mhash_init (&nm->neighbor_index_by_key,
/* value size */ sizeof (uword),
/* key size */ sizeof (ip6_neighbor_key_t));
icmp6_register_type (vm, ICMP6_neighbor_solicitation,
ip6_icmp_neighbor_solicitation_node.index);
icmp6_register_type (vm, ICMP6_neighbor_advertisement,
ip6_icmp_neighbor_advertisement_node.index);
icmp6_register_type (vm, ICMP6_router_solicitation,
ip6_icmp_router_solicitation_node.index);
icmp6_register_type (vm, ICMP6_router_advertisement,
ip6_icmp_router_advertisement_node.index);
/* handler node for ip6 neighbor discovery events and timers */
vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node);
/* add call backs */
ip6_add_del_interface_address_callback_t cb;
clib_memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t));
/* when an interface address changes... */
cb.function = ip6_neighbor_add_del_interface_address;
cb.function_opaque = 0;
vec_add1 (im->add_del_interface_address_callbacks, cb);
ip6_table_bind_callback_t cbt;
cbt.function = ip6_neighbor_table_bind;
cbt.function_opaque = 0;
vec_add1 (im->table_bind_callbacks, cbt);
mhash_init (&nm->pending_resolutions_by_address,
/* value size */ sizeof (uword),
/* key size */ sizeof (ip6_address_t));
mhash_init (&nm->mac_changes_by_address,
/* value size */ sizeof (uword),
/* key size */ sizeof (ip6_address_t));
/* default, configurable */
nm->limit_neighbor_cache_size = 50000;
nm->wc_ip6_nd_publisher_node = (uword) ~ 0;
nm->ip6_ra_publisher_node = (uword) ~ 0;
#if 0
/* $$$$ Hack fix for today */
vec_validate_init_empty
(im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ );
#endif
return 0;
}
VLIB_INIT_FUNCTION (ip6_neighbor_init);
void
vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm,
void *address_arg,
uword node_index,
uword type_opaque, uword data)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_address_t *address = address_arg;
uword *p;
pending_resolution_t *pr;
pool_get (nm->pending_resolutions, pr);
memset (pr, 0, sizeof (*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,
ip6_nd_change_event_cb_t data_callback,
u32 pid,
void *address_arg,
uword node_index,
uword type_opaque, uword data, int is_add)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_address_t *address = address_arg;
/* Try to find an existing entry */
u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address);
u32 *p = first;
pending_resolution_t *mc;
while (p && *p != ~0)
{
mc = pool_elt_at_index (nm->mac_changes, *p);
if (mc->node_index == node_index && mc->type_opaque == type_opaque
&& mc->pid == pid)
break;
p = &mc->next_index;
}
int found = p && *p != ~0;
if (is_add)
{
if (found)
return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
pool_get (nm->mac_changes, mc);
memset (mc, 0, sizeof (*mc));
/* *INDENT-OFF* */
*mc = (pending_resolution_t)
{
.next_index = ~0,
.node_index = node_index,
.type_opaque = type_opaque,
.data = data,
.data_callback = data_callback,
.pid = pid,
};
/* *INDENT-ON* */
/* Insert new resolution at the end of the list */
u32 new_idx = mc - nm->mac_changes;
if (p)
p[0] = new_idx;
else
mhash_set (&nm->mac_changes_by_address, address, new_idx, 0);
}
else
{
if (!found)
return VNET_API_ERROR_NO_SUCH_ENTRY;
/* Clients may need to clean up pool entries, too */
if (data_callback)
(data_callback) (mc->data, NULL /* no new mac addrs */ , 0, NULL);
/* Remove the entry from the list and delete the entry */
*p = mc->next_index;
pool_put (nm->mac_changes, mc);
/* Remove from hash if we deleted the last entry */
if (*p == ~0 && p == first)
mhash_unset (&nm->mac_changes_by_address, address, 0);
}
return 0;
}
int
vnet_ip6_nd_term (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_buffer_t * p0,
ethernet_header_t * eth,
ip6_header_t * ip, u32 sw_if_index, u16 bd_index)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
icmp6_neighbor_solicitation_or_advertisement_header_t *ndh;
mac_address_t mac;
mac_address_from_bytes (&mac, eth->src_address);
ndh = ip6_next_header (ip);
if (ndh->icmp.type != ICMP6_neighbor_solicitation &&
ndh->icmp.type != ICMP6_neighbor_advertisement)
return 0;
if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
(p0->flags & VLIB_BUFFER_IS_TRACED)))
{
u8 *t0 = vlib_add_trace (vm, node, p0,
sizeof (icmp6_input_trace_t));
clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t));
}
/* Check if anyone want ND events for L2 BDs */
if (PREDICT_FALSE
(nm->wc_ip6_nd_publisher_node != (uword) ~ 0
&& !ip6_address_is_link_local_unicast (&ip->src_address)))
{
vnet_nd_wc_publish (sw_if_index, &mac, &ip->src_address);
}
/* Check if MAC entry exsist for solicited target IP */
if (ndh->icmp.type == ICMP6_neighbor_solicitation)
{
icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt;
l2_bridge_domain_t *bd_config;
u8 *macp;
opt = (void *) (ndh + 1);
if ((opt->header.type !=
ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) ||
(opt->header.n_data_u64s != 1))
return 0; /* source link layer address option not present */
bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index);
macp =
(u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address);
if (macp)
{ /* found ip-mac entry, generate eighbor advertisement response */
int bogus_length;
vlib_node_runtime_t *error_node =
vlib_node_get_runtime (vm, ip6_icmp_input_node.index);
ip->dst_address = ip->src_address;
ip->src_address = ndh->target_address;
ip->hop_limit = 255;
opt->header.type =
ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
clib_memcpy (opt->ethernet_address, macp, 6);
ndh->icmp.type = ICMP6_neighbor_advertisement;
ndh->advertisement_flags = clib_host_to_net_u32
(ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED |
ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
ndh->icmp.checksum = 0;
ndh->icmp.checksum =
ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length);
clib_memcpy (eth->dst_address, eth->src_address, 6);
clib_memcpy (eth->src_address, macp, 6);
vlib_error_count (vm, error_node->node_index,
ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1);
return 1;
}
}
return 0;
}
int
ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del)
{
u32 fib_index;
fib_prefix_t pfx = {
.fp_len = 128,
.fp_proto = FIB_PROTOCOL_IP6,
.fp_addr = {
.ip6 = *addr,
},
};
ip46_address_t nh = {
.ip6 = *addr,
};
fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index);
if (~0 == fib_index)
return VNET_API_ERROR_NO_SUCH_FIB;
if (is_del)
{
fib_table_entry_path_remove (fib_index,
&pfx,
FIB_SOURCE_IP6_ND_PROXY,
DPO_PROTO_IP6,
&nh,
sw_if_index,
~0, 1, FIB_ROUTE_PATH_FLAG_NONE);
/* flush the ND cache of this address if it's there */
vnet_unset_ip6_ethernet_neighbor (vlib_get_main (), sw_if_index, addr);
}
else
{
fib_table_entry_path_add (fib_index,
&pfx,
FIB_SOURCE_IP6_ND_PROXY,
FIB_ENTRY_FLAG_NONE,
DPO_PROTO_IP6,
&nh,
sw_if_index,
~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE);
}
return (0);
}
static clib_error_t *
set_ip6_nd_proxy_cmd (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
vnet_main_t *vnm = vnet_get_main ();
clib_error_t *error = 0;
ip6_address_t addr;
u32 sw_if_index;
u8 is_del = 0;
if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index))
{
/* get the rest of the command */
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "%U", unformat_ip6_address, &addr))
break;
else if (unformat (input, "delete") || unformat (input, "del"))
is_del = 1;
else
return (unformat_parse_error (input));
}
}
ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del);
return error;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) =
{
.path = "set ip6 nd proxy",
.short_help = "set ip6 nd proxy <HOST> <INTERFACE>",
.function = set_ip6_nd_proxy_cmd,
};
/* *INDENT-ON* */
void
ethernet_ndp_change_mac (u32 sw_if_index)
{
ip6_neighbor_main_t *nm = &ip6_neighbor_main;
ip6_neighbor_t *n;
adj_index_t ai;
/* *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* */
ai = adj_glean_get (FIB_PROTOCOL_IP6, sw_if_index);
if (ADJ_INDEX_INVALID != ai)
adj_glean_update_rewrite (ai);
}
void
send_ip6_na (vlib_main_t * vm, u32 sw_if_index)
{
ip6_main_t *i6m = &ip6_main;
ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index);
send_ip6_na_w_addr (vm, ip6_addr, sw_if_index);
}
void
send_ip6_na_w_addr (vlib_main_t * vm,
const ip6_address_t * ip6_addr, u32 sw_if_index)
{
ip6_main_t *i6m = &ip6_main;
vnet_main_t *vnm = vnet_get_main ();
u8 *rewrite, rewrite_len;
vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
u8 dst_address[6];
if (ip6_addr)
{
clib_warning
("Sending unsolicitated NA IP6 address %U on sw_if_idex %d",
format_ip6_address, ip6_addr, sw_if_index);
/* Form unsolicited neighbor advertisement packet from NS pkt template */
int bogus_length;
u32 bi = 0;
icmp6_neighbor_solicitation_header_t *h =
vlib_packet_template_get_packet (vm,
&i6m->discover_neighbor_packet_template,
&bi);
if (!h)
return;
ip6_set_reserved_multicast_address (&h->ip.dst_address,
IP6_MULTICAST_SCOPE_link_local,
IP6_MULTICAST_GROUP_ID_all_hosts);
h->ip.src_address = ip6_addr[0];
h->neighbor.icmp.type = ICMP6_neighbor_advertisement;
h->neighbor.target_address = ip6_addr[0];
h->neighbor.advertisement_flags = clib_host_to_net_u32
(ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE);
h->link_layer_option.header.type =
ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address;
clib_memcpy (h->link_layer_option.ethernet_address,
hi->hw_address, vec_len (hi->hw_address));
h->neighbor.icmp.checksum =
ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length);
ASSERT (bogus_length == 0);
/* Setup MAC header with IP6 Etype and mcast DMAC */
vlib_buffer_t *b = vlib_get_buffer (vm, bi);
ip6_multicast_ethernet_address (dst_address,
IP6_MULTICAST_GROUP_ID_all_hosts);
rewrite =
ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_IP6, dst_address);
rewrite_len = vec_len (rewrite);
vlib_buffer_advance (b, -rewrite_len);
ethernet_header_t *e = vlib_buffer_get_current (b);
clib_memcpy (e->dst_address, rewrite, rewrite_len);
vec_free (rewrite);
/* Send unsolicited ND advertisement packet out the specified interface */
vnet_buffer (b)->sw_if_index[VLIB_RX] =
vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index;
vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index);
u32 *to_next = vlib_frame_vector_args (f);
to_next[0] = bi;
f->n_vectors = 1;
vlib_put_frame_to_node (vm, hi->output_node_index, f);
}
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/