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gerrit.nordix.org / fdio / vpp / 5d280d5b51ace57f73ac1b43caf6c37c6ae11529 / . / src / vnet / ip6-nd / ip6_ra.c
blob: 895f309282040f6bee6c44a28ad53341ddb33f6d [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/ip6-nd/ip6_ra.h>
#include <vnet/ip/ip.h>
#include <vnet/ip-neighbor/ip_neighbor_dp.h>
#include <vnet/fib/ip6_fib.h>
#include <vnet/ip/ip6_link.h>
/**
* @file
* @brief IPv6 Router Advertisements.
*
* The files contains the API and CLI code for managing IPv6 RAs
*/
/* *INDENT-OFF* */
/* Router solicitation packet format for ethernet. */
typedef CLIB_PACKED (struct
{
ip6_header_t ip;
icmp6_neighbor_discovery_header_t neighbor;
icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
link_layer_option;
}) icmp6_router_solicitation_header_t;
/* router advertisement packet format for ethernet. */
typedef CLIB_PACKED (struct
{
ip6_header_t ip;
icmp6_router_advertisement_header_t router;
icmp6_neighbor_discovery_ethernet_link_layer_address_option_t
link_layer_option;
icmp6_neighbor_discovery_mtu_option_t mtu_option;
icmp6_neighbor_discovery_prefix_information_option_t
prefix[0];
}) icmp6_router_advertisement_packet_t;
/* *INDENT-ON* */
#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 */
/* 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 ip6_ra_t_
{
/* 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;
/* 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 ref_count;
/* 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;
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;
/* 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;
u32 seed;
} ip6_ra_t;
static ip6_link_delegate_id_t ip6_ra_delegate_id;
static ip6_ra_t *ip6_ra_pool;
/* vector of registered RA report listeners */
static ip6_ra_report_notify_t *ip6_ra_listeners;
static int ip6_ra_publish (ip6_ra_report_t * r);
void
ip6_ra_report_register (ip6_ra_report_notify_t fn)
{
ip6_ra_report_notify_t *listener;
vec_foreach (listener, ip6_ra_listeners)
{
if (*listener == fn)
return;
}
vec_add1 (ip6_ra_listeners, fn);
}
void
ip6_ra_report_unregister (ip6_ra_report_notify_t fn)
{
u32 ii;
vec_foreach_index (ii, ip6_ra_listeners)
{
if (ip6_ra_listeners[ii] == fn)
{
vec_del1 (ip6_ra_listeners, ii);
break;
}
}
}
static inline ip6_ra_t *
ip6_ra_get_itf (u32 sw_if_index)
{
index_t rai;
rai = ip6_link_delegate_get (sw_if_index, ip6_ra_delegate_id);
if (INDEX_INVALID != rai)
return (pool_elt_at_index (ip6_ra_pool, rai));
return (NULL);
}
/* 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 (vlib_get_elog_main (), e);
ed->s[0] =
elog_string (vlib_get_elog_main (), log_level_strings[priority]);
ed->s[1] = elog_string (vlib_get_elog_main (), (char *) what);
}
va_end (va);
return;
}
/* ipv6 neighbor discovery - router advertisements */
typedef enum
{
ICMP6_ROUTER_SOLICITATION_NEXT_DROP,
ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW,
ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX,
ICMP6_ROUTER_SOLICITATION_N_NEXT,
} icmp6_router_solicitation_or_advertisement_next_t;
/*
* Note: Both periodic RAs and solicited RS come through here.
*/
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;
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_ra_t *radv_info = NULL;
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))
{
/* *INDENT-OFF* */
ip_neighbor_learn_t learn = {
.sw_if_index = sw_if_index0,
.ip = {
.ip.ip6 = ip0->src_address,
.version = AF_IP6,
},
};
/* *INDENT-ON* */
memcpy (&learn.mac, o0->ethernet_address, sizeof (learn.mac));
ip_neighbor_learn_dp (&learn);
}
/* 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)
{
/* adjust the sizeof the buffer to just include the ipv6 header */
p0->current_length -=
(options_len0 +
sizeof (icmp6_neighbor_discovery_header_t));
radv_info = ip6_ra_get_itf (sw_if_index0);
error0 = ((!radv_info) ?
ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
error0);
error0 = radv_info->send_radv == 0 ?
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;
/* Handy for debugging, but too noisy... */
if (0 && CLIB_DEBUG > 0)
clib_warning
("send RA for prefix %U/%d "
"sw_if_index %d valid %u preferred %u",
format_ip6_address, &pr_info->prefix,
pr_info->prefix_len, sw_if_index0,
clib_net_to_host_u32 (h.valid_time),
clib_net_to_host_u32 (h.preferred_time));
if (h.valid_time == 0)
clib_warning ("BUG: send RA with 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 */
ip6_address_copy (&ip0->src_address,
ip6_get_link_local_address
(radv_info->sw_if_index));
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 = ip6_link_get_mcast_adj (sw_if_index0);
if (adj_index0 == INDEX_INVALID)
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;
}
/* *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* */
/* 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 ();
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_ra_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)
{
/* look up the radv_t information for this interface */
radv_info = ip6_ra_get_itf (sw_if_index0);
error0 = ((!radv_info) ?
ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG :
error0);
if (error0 == ICMP6_ERROR_NONE)
{
radv_info->keep_sending_rs = 0;
ip6_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;
}
}
ip6_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;
}
/* *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* */
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_ra_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);
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] =
ip6_link_get_mcast_adj (sw_if_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;
ip6_address_copy (&rh->ip.src_address,
ip6_get_link_local_address (radv_info->sw_if_index));
/* 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_ra_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_ra_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);
if (c0 == NULL)
return radv_info->keep_sending_rs;
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)
{
uword *event_data = NULL;
f64 sleep_time = 1e9;
ip6_ra_t *radv_info;
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, ip6_ra_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 (ip6_rs_process_node) = {
.function = send_rs_process,
.type = VLIB_NODE_TYPE_PROCESS,
.name = "ip6-rs-process",
};
/* *INDENT-ON* */
void
icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop,
const icmp6_send_router_solicitation_params_t
* params)
{
ip6_ra_t *ra;
ASSERT (~0 != sw_if_index);
ra = ip6_ra_get_itf (sw_if_index);
if (!ra)
return;
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, ip6_rs_process_node.index, 1, 0);
}
}
static const ethernet_interface_t *
ip6_ra_get_eth_itf (u32 sw_if_index)
{
const vnet_sw_interface_t *sw;
/* lookup radv container - ethernet interfaces only */
sw = vnet_get_sup_sw_interface (vnet_get_main (), sw_if_index);
if (sw->type == VNET_SW_INTERFACE_TYPE_HARDWARE)
return (ethernet_get_interface (&ethernet_main, sw->hw_if_index));
return (NULL);
}
/**
* @brief called when IP6 is enabled on an interface
*create and initialize router advertisement parameters with default
* values for this intfc
*/
static void
ip6_ra_link_enable (u32 sw_if_index)
{
const ethernet_interface_t *eth;
ip6_ra_t *radv_info;
eth = ip6_ra_get_eth_itf (sw_if_index);
if (NULL == eth)
return;
ASSERT (INDEX_INVALID == ip6_link_delegate_get (sw_if_index,
ip6_ra_delegate_id));
pool_get_zero (ip6_ra_pool, radv_info);
radv_info->seed = (u32) clib_cpu_time_now ();
random_u32 (&radv_info->seed);
radv_info->sw_if_index = sw_if_index;
radv_info->max_radv_interval = DEF_MAX_RADV_INTERVAL;
radv_info->min_radv_interval = DEF_MIN_RADV_INTERVAL;
radv_info->curr_hop_limit = DEF_CURR_HOP_LIMIT;
radv_info->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME;
/* send ll address source address option */
radv_info->adv_link_layer_address = 1;
radv_info->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS;
radv_info->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS;
radv_info->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME;
radv_info->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS;
radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1;
radv_info->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL;
/* deafult is to send */
radv_info->send_radv = 1;
/* fill in delegate for this interface that will be needed later */
radv_info->adv_link_mtu =
vnet_sw_interface_get_mtu (vnet_get_main (), sw_if_index, VNET_MTU_IP6);
mhash_init (&radv_info->address_to_prefix_index, sizeof (uword),
sizeof (ip6_address_t));
ip6_link_delegate_update (sw_if_index, ip6_ra_delegate_id,
radv_info - ip6_ra_pool);
}
static void
ip6_ra_delegate_disable (index_t rai)
{
ip6_radv_prefix_t *p;
ip6_ra_t *radv_info;
radv_info = pool_elt_at_index (ip6_ra_pool, rai);
/* clean up prefix and MDP pools */
/* *INDENT-OFF* */
pool_flush(p, radv_info->adv_prefixes_pool,
({
mhash_unset (&radv_info->address_to_prefix_index, &p->prefix, 0);
}));
/* *INDENT-ON* */
pool_free (radv_info->adv_prefixes_pool);
mhash_free (&radv_info->address_to_prefix_index);
pool_put (ip6_ra_pool, radv_info);
}
void
ip6_ra_update_secondary_radv_info (ip6_address_t * address, u8 prefix_len,
u32 primary_sw_if_index,
u32 valid_time, u32 preferred_time)
{
vlib_main_t *vm = vlib_get_main ();
static u32 *radv_indices;
ip6_ra_t *radv_info;
int i;
ip6_address_t mask;
ip6_address_mask_from_width (&mask, prefix_len);
vec_reset_length (radv_indices);
/* *INDENT-OFF* */
pool_foreach (radv_info, ip6_ra_pool)
{
vec_add1 (radv_indices, radv_info - ip6_ra_pool);
}
/* *INDENT-ON* */
/*
* If we have another customer for this prefix,
* tell the RA code about it...
*/
for (i = 0; i < vec_len (radv_indices); i++)
{
ip6_radv_prefix_t *this_prefix;
radv_info = pool_elt_at_index (ip6_ra_pool, radv_indices[i]);
/* We already took care of these timers... */
if (radv_info->sw_if_index == primary_sw_if_index)
continue;
/* *INDENT-OFF* */
pool_foreach (this_prefix, radv_info->adv_prefixes_pool)
{
if (this_prefix->prefix_len == prefix_len
&& ip6_address_is_equal_masked (&this_prefix->prefix, address,
&mask))
{
int rv = ip6_ra_prefix (vm,
radv_info->sw_if_index,
address,
prefix_len,
0 /* use_default */,
valid_time,
preferred_time,
0 /* no_advertise */,
0 /* off_link */,
0 /* no_autoconfig */,
0 /* no_onlink */,
0 /* is_no */);
if (rv != 0)
clib_warning ("ip6_neighbor_ra_prefix returned %d", rv);
}
}
/* *INDENT-ON*/
}
}
/* send a RA or update the timer info etc.. */
static uword
ip6_ra_process_timer_event (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
vnet_main_t *vnm = vnet_get_main ();
ip6_ra_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, ip6_ra_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;
continue;
}
/* 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 void
ip6_ra_handle_report (ip6_ra_report_t * rap)
{
u32 ii;
vec_foreach_index (ii, ip6_ra_listeners) ip6_ra_listeners[ii] (rap);
vec_free (rap->prefixes);
clib_mem_free (rap);
}
static uword
ip6_ra_event_process (vlib_main_t * vm,
vlib_node_runtime_t * node, vlib_frame_t * frame)
{
ip6_ra_report_t *r;
uword event_type;
uword *event_data = 0;
int i;
/* init code here */
while (1)
{
vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ );
event_type = vlib_process_get_events (vm, &event_data);
if (event_type == ~0)
{
/* No events found: timer expired. */
/* process interface list and send RAs as appropriate, update timer info */
ip6_ra_process_timer_event (vm, node, frame);
}
else
{
for (i = 0; i < vec_len (event_data); i++)
{
r = (void *) (event_data[i]);
ip6_ra_handle_report (r);
}
vec_reset_length (event_data);
}
}
return frame->n_vectors;
}
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (ip6_ra_process_node) =
{
.function = ip6_ra_event_process,
.name = "ip6-ra-process",
.type = VLIB_NODE_TYPE_PROCESS,
};
/* *INDENT-ON* */
static void
ip6_ra_signal_report (ip6_ra_report_t * r)
{
vlib_main_t *vm = vlib_get_main ();
ip6_ra_report_t *q;
if (!vec_len (ip6_ra_listeners))
return;
q = clib_mem_alloc (sizeof (*q));
*q = *r;
vlib_process_signal_event (vm, ip6_ra_process_node.index, 0, (uword) q);
}
static int
ip6_ra_publish (ip6_ra_report_t * r)
{
void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
vl_api_rpc_call_main_thread (ip6_ra_signal_report, (u8 *) r, sizeof *r);
return 0;
}
/* API support functions */
int
ip6_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_ra_t *radv_info;
/* look up the radv_t information for this interface */
radv_info = ip6_ra_get_itf (sw_if_index);
if (!radv_info)
return (VNET_API_ERROR_IP6_NOT_ENABLED);
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 (0);
}
int
ip6_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_ra_t *radv_info;
/* look up the radv_t information for this interface */
radv_info = ip6_ra_get_itf (sw_if_index);
if (!radv_info)
return (VNET_API_ERROR_IP6_NOT_ENABLED);
f64 now = vlib_time_now (vm);
/* 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 (0);
}
/* adding or changing */
if (!prefix)
{
/* add */
u32 pi;
pool_get_zero (radv_info->adv_prefixes_pool, prefix);
pi = prefix - radv_info->adv_prefixes_pool;
mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi,
/* old_value */ 0);
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 (0);
}
clib_error_t *
ip6_ra_cmd (vlib_main_t * vm,
unformat_input_t * main_input, vlib_cli_command_t * cmd)
{
vnet_main_t *vnm = vnet_get_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;
int add_radv_info = 1;
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))
{
if (!ip6_ra_get_eth_itf (sw_if_index))
{
error =
clib_error_return (0, "Interface must be of ethernet type");
goto done;
}
if (!ip6_link_is_enabled (sw_if_index))
{
error = clib_error_return (0, "IP6 nt enabler 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;
}
else if (unformat (line_input, "ra-managed-config-flag"))
{
managed = 1;
}
else if (unformat (line_input, "ra-other-config-flag"))
{
other = 1;
}
else if (unformat (line_input, "ra-suppress") ||
unformat (line_input, "ra-surpress"))
{
suppress = 1;
}
else if (unformat (line_input, "ra-suppress-link-layer") ||
unformat (line_input, "ra-surpress-link-layer"))
{
suppress_ll_option = 1;
}
else if (unformat (line_input, "ra-send-unicast"))
{
send_unicast = 1;
}
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;
}
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;
}
}
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;
}
else if (unformat (line_input, "ra-cease"))
{
cease = 1;
}
else
{
error = unformat_parse_error (line_input);
goto done;
}
}
if (add_radv_info)
{
ip6_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_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 u8 *
format_ip6_ra (u8 * s, va_list * args)
{
index_t rai = va_arg (*args, index_t);
u32 indent = va_arg (*args, u32);
ip6_radv_prefix_t *p;
ip6_ra_t *radv_info;
radv_info = pool_elt_at_index (ip6_ra_pool, rai);
s = format (s, "%UAdvertised Prefixes:\n", format_white_space, indent);
indent += 2;
/* *INDENT-OFF* */
pool_foreach (p, radv_info->adv_prefixes_pool)
{
s = format (s, "%Uprefix %U, length %d\n",
format_white_space, indent+2,
format_ip6_address, &p->prefix, p->prefix_len);
}
/* *INDENT-ON* */
s = format (s, "%UMTU is %d\n",
format_white_space, indent, radv_info->adv_link_mtu);
s = format (s, "%UICMP error messages are unlimited\n",
format_white_space, indent);
s = format (s, "%UICMP redirects are disabled\n",
format_white_space, indent);
s = format (s, "%UICMP unreachables are not sent\n",
format_white_space, indent);
s = format (s, "%UND DAD is disabled\n", format_white_space, indent);
//s = format (s, "%UND reachable time is %d milliseconds\n",);
s = format (s, "%UND advertised reachable time is %d\n",
format_white_space, indent,
radv_info->adv_neighbor_reachable_time_in_msec);
s = format (s,
"%UND advertised retransmit interval is %d (msec)\n",
format_white_space, indent,
radv_info->
adv_time_in_msec_between_retransmitted_neighbor_solicitations);
s =
format (s,
"%UND router advertisements are sent every %0.1f seconds (min interval is %0.1f)\n",
format_white_space, indent, radv_info->max_radv_interval,
radv_info->min_radv_interval);
s =
format (s, "%UND router advertisements live for %d seconds\n",
format_white_space, indent,
radv_info->adv_router_lifetime_in_sec);
s =
format (s, "%UHosts %s stateless autoconfig for addresses\n",
format_white_space, indent,
(radv_info->adv_managed_flag) ? "use" : " don't use");
s =
format (s, "%UND router advertisements sent %d\n", format_white_space,
indent, radv_info->n_advertisements_sent);
s =
format (s, "%UND router solicitations received %d\n", format_white_space,
indent, radv_info->n_solicitations_rcvd);
s =
format (s, "%UND router solicitations dropped %d\n", format_white_space,
indent, radv_info->n_solicitations_dropped);
return (s);
}
/*?
* 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_ra_cmd,
};
/* *INDENT-ON* */
/**
* VFT for registering as a delegate to an IP6 link
*/
const static ip6_link_delegate_vft_t ip6_ra_delegate_vft = {
.ildv_disable = ip6_ra_delegate_disable,
.ildv_enable = ip6_ra_link_enable,
.ildv_format = format_ip6_ra,
};
static clib_error_t *
ip6_ra_init (vlib_main_t * vm)
{
vlib_call_init_function (vm, icmp6_init);
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);
ip6_ra_delegate_id = ip6_link_delegate_register (&ip6_ra_delegate_vft);
return (NULL);
}
/* *INDENT-OFF* */
VLIB_INIT_FUNCTION (ip6_ra_init) =
{
.runs_after = VLIB_INITS("icmp6_init"),
};
/* *INDENT-ON* */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/