diff options
Diffstat (limited to 'src/vnet/ip6-nd/ip6_ra.c')
| -rw-r--r-- | src/vnet/ip6-nd/ip6_ra.c | 2261 |
1 files changed, 2261 insertions, 0 deletions
diff --git a/src/vnet/ip6-nd/ip6_ra.c b/src/vnet/ip6-nd/ip6_ra.c new file mode 100644 index 00000000000..ebc2c4be417 --- /dev/null +++ b/src/vnet/ip6-nd/ip6_ra.c @@ -0,0 +1,2261 @@ +/* + * 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 (&vm->elog_main, e); + ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]); + ed->s[1] = elog_string (&vm->elog_main, (char *) what); + } + va_end (va); + return; +} + +/* ipv6 neighbor discovery - router advertisements */ +typedef enum +{ + ICMP6_ROUTER_SOLICITATION_NEXT_DROP, + ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW, + ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX, + ICMP6_ROUTER_SOLICITATION_N_NEXT, +} icmp6_router_solicitation_or_advertisement_next_t; + +static_always_inline uword +icmp6_router_solicitation (vlib_main_t * vm, + vlib_node_runtime_t * node, vlib_frame_t * frame) +{ + vnet_main_t *vnm = vnet_get_main (); + ip6_main_t *im = &ip6_main; + 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)) + { + ip_neighbor_learn_t learn = { + .type = IP46_TYPE_IP6, + .sw_if_index = sw_if_index0, + .ip.ip6 = ip0->src_address, + }; + 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 (ðernet_main, sw_if0->hw_if_index); + + /* only support ethernet interface type for now */ + error0 = + (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF + : error0; + + if (error0 == ICMP6_ERROR_NONE) + { + /* 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); + + 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, + clib_net_to_host_u32 (h.valid_time), + clib_net_to_host_u32 (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 */ + 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 (ðernet_main, sw_if0->hw_if_index); + + /* only support ethernet interface type for now */ + error0 = + (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF + : error0; + + if (error0 == ICMP6_ERROR_NONE) + { + /* 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); + 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] = + 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); + 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 (ðernet_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); +} + +/* 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 (const ip6_ra_report_t * rap) +{ + u32 ii; + + vec_foreach_index (ii, ip6_ra_listeners) ip6_ra_listeners[ii] (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, *rs; + uword event_type; + + /* init code here */ + + while (1) + { + vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ ); + + rs = vlib_process_get_event_data (vm, &event_type); + + if (NULL == rs) + { + /* 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 + { + vec_foreach (r, rs) ip6_ra_handle_report (r); + vec_reset_length (rs); + } + } + return frame->n_vectors; +} + +VLIB_REGISTER_NODE (ip6_ra_process_node) = +{ +.function = ip6_ra_event_process,.name = "ip6-ra-process",.type = + VLIB_NODE_TYPE_PROCESS,}; + +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 = vlib_process_signal_event_data (vm, + ip6_ra_process_node.index, + 0, 1, sizeof *q); + *q = *r; +} + +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; + 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_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: + */ |