diff options
| author |   Neale Ranns <nranns@cisco.com> | 2019-09-30 10:53:31 +0000 |
|---|---|---|
| committer |   Ole Trøan <otroan@employees.org> | 2019-12-17 10:56:20 +0000 |
| commit | cbe25aab3be72154f2c706c39eeba6a77f34450f (patch) | |
| tree | 131fb53b5ec973be045ffb9e2eb797af01d112a0 /src/vnet/ip/ip6_neighbor.c | |
| parent | 96453fd2417ebd1d69354a7fb692976129cea80e (diff) | |
ip: Protocol Independent IP Neighbors
Type: feature
- ip-neighbour: generic neighbour handling; APIs, DBs, event handling,
aging
- arp: ARP protocol implementation
- ip6-nd; IPv6 neighbor discovery implementation; separate ND,
MLD, RA
- ip6-link; manage link-local addresses
- l2-arp-term; events separated from IP neighbours, since they are not
the same.
vnet retains just enough education to perform ND/ARP packet
construction.
arp and ip6-nd to be moved to plugins soon.
Change-Id: I88dedd0006b299344f4c7024a0aa5baa6b9a8bbe
Signed-off-by: Neale Ranns <nranns@cisco.com>
Diffstat (limited to 'src/vnet/ip/ip6_neighbor.c')
| -rw-r--r-- | src/vnet/ip/ip6_neighbor.c | 5034 |
1 files changed, 0 insertions, 5034 deletions
diff --git a/src/vnet/ip/ip6_neighbor.c b/src/vnet/ip/ip6_neighbor.c deleted file mode 100644 index 5b8085d556d..00000000000 --- a/src/vnet/ip/ip6_neighbor.c +++ /dev/null @@ -1,5034 +0,0 @@ -/* - * ip/ip6_neighbor.c: IP6 neighbor handling - * - * Copyright (c) 2010 Cisco and/or its affiliates. - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include <vnet/ip/ip.h> -#include <vnet/ip/ip6_neighbor.h> -#include <vnet/ethernet/ethernet.h> -#include <vppinfra/mhash.h> -#include <vnet/adj/adj.h> -#include <vnet/adj/adj_mcast.h> -#include <vnet/fib/fib_table.h> -#include <vnet/fib/ip6_fib.h> -#include <vnet/mfib/ip6_mfib.h> -#include <vnet/ip/ip6_ll_table.h> -#include <vnet/l2/l2_input.h> -#include <vlibmemory/api.h> - -/** - * @file - * @brief IPv6 Neighbor Adjacency and Neighbor Discovery. - * - * The files contains the API and CLI code for managing IPv6 neighbor - * adjacency tables and neighbor discovery logic. - */ - -/* can't use sizeof link_layer_address, that's 8 */ -#define ETHER_MAC_ADDR_LEN 6 - -/* advertised prefix option */ -typedef struct -{ - /* basic advertised information */ - ip6_address_t prefix; - u8 prefix_len; - int adv_on_link_flag; - int adv_autonomous_flag; - u32 adv_valid_lifetime_in_secs; - u32 adv_pref_lifetime_in_secs; - - /* advertised values are computed from these times if decrementing */ - f64 valid_lifetime_expires; - f64 pref_lifetime_expires; - - /* local information */ - int enabled; - int deprecated_prefix_flag; - int decrement_lifetime_flag; - -#define MIN_ADV_VALID_LIFETIME 7203 /* seconds */ -#define DEF_ADV_VALID_LIFETIME 2592000 -#define DEF_ADV_PREF_LIFETIME 604800 - - /* extensions are added here, mobile, DNS etc.. */ -} ip6_radv_prefix_t; - - -typedef struct -{ - /* group information */ - u8 type; - ip6_address_t mcast_address; - u16 num_sources; - ip6_address_t *mcast_source_address_pool; -} ip6_mldp_group_t; - -/* configured router advertisement information per ipv6 interface */ -typedef struct -{ - - /* advertised config information, zero means unspecified */ - u8 curr_hop_limit; - int adv_managed_flag; - int adv_other_flag; - u16 adv_router_lifetime_in_sec; - u32 adv_neighbor_reachable_time_in_msec; - u32 adv_time_in_msec_between_retransmitted_neighbor_solicitations; - - /* mtu option */ - u32 adv_link_mtu; - - /* source link layer option */ - u8 link_layer_address[8]; - u8 link_layer_addr_len; - - /* prefix option */ - ip6_radv_prefix_t *adv_prefixes_pool; - - /* Hash table mapping address to index in interface advertised prefix pool. */ - mhash_t address_to_prefix_index; - - /* MLDP group information */ - ip6_mldp_group_t *mldp_group_pool; - - /* Hash table mapping address to index in mldp address pool. */ - mhash_t address_to_mldp_index; - - /* local information */ - u32 sw_if_index; - int send_radv; /* radv on/off on this interface - set by config */ - int cease_radv; /* we are ceasing to send - set byf config */ - int send_unicast; - int adv_link_layer_address; - int prefix_option; - int failed_device_check; - int all_routers_mcast; - u32 seed; - u64 randomizer; - int ref_count; - adj_index_t mcast_adj_index; - - /* timing information */ -#define DEF_MAX_RADV_INTERVAL 200 -#define DEF_MIN_RADV_INTERVAL .75 * DEF_MAX_RADV_INTERVAL -#define DEF_CURR_HOP_LIMIT 64 -#define DEF_DEF_RTR_LIFETIME 3 * DEF_MAX_RADV_INTERVAL -#define MAX_DEF_RTR_LIFETIME 9000 - -#define MAX_INITIAL_RTR_ADVERT_INTERVAL 16 /* seconds */ -#define MAX_INITIAL_RTR_ADVERTISEMENTS 3 /*transmissions */ -#define MIN_DELAY_BETWEEN_RAS 3 /* seconds */ -#define MAX_DELAY_BETWEEN_RAS 1800 /* seconds */ -#define MAX_RA_DELAY_TIME .5 /* seconds */ - - f64 max_radv_interval; - f64 min_radv_interval; - f64 min_delay_between_radv; - f64 max_delay_between_radv; - f64 max_rtr_default_lifetime; - - f64 last_radv_time; - f64 last_multicast_time; - f64 next_multicast_time; - - - u32 initial_adverts_count; - f64 initial_adverts_interval; - u32 initial_adverts_sent; - - /* stats */ - u32 n_advertisements_sent; - u32 n_solicitations_rcvd; - u32 n_solicitations_dropped; - - /* Link local address to use (defaults to underlying physical for logical interfaces */ - ip6_address_t link_local_address; - - /* router solicitations sending state */ - u8 keep_sending_rs; /* when true then next fields are valid */ - icmp6_send_router_solicitation_params_t params; - f64 sleep_interval; - f64 due_time; - u32 n_left; - f64 start_time; - vlib_buffer_t *buffer; -} ip6_radv_t; - -typedef struct -{ - u32 next_index; - uword node_index; - uword type_opaque; - uword data; - /* Used for nd event notification only */ - ip6_nd_change_event_cb_t data_callback; - u32 pid; -} pending_resolution_t; - - -typedef struct -{ - /* Hash tables mapping name to opcode. */ - uword *opcode_by_name; - - /* lite beer "glean" adjacency handling */ - mhash_t pending_resolutions_by_address; - pending_resolution_t *pending_resolutions; - - /* Mac address change notification */ - mhash_t mac_changes_by_address; - pending_resolution_t *mac_changes; - - u32 *neighbor_input_next_index_by_hw_if_index; - - ip6_neighbor_t *neighbor_pool; - - mhash_t neighbor_index_by_key; - - u32 *if_radv_pool_index_by_sw_if_index; - - ip6_radv_t *if_radv_pool; - - /* Neighbor attack mitigation */ - u32 limit_neighbor_cache_size; - u32 neighbor_delete_rotor; - - /* Wildcard nd report publisher */ - uword wc_ip6_nd_publisher_node; - uword wc_ip6_nd_publisher_et; - - /* Router advertisement report publisher */ - uword ip6_ra_publisher_node; - uword ip6_ra_publisher_et; -} ip6_neighbor_main_t; - -/* ipv6 neighbor discovery - timer/event types */ -typedef enum -{ - ICMP6_ND_EVENT_INIT, -} ip6_icmp_neighbor_discovery_event_type_t; - -typedef union -{ - u32 add_del_swindex; - struct - { - u32 up_down_swindex; - u32 fib_index; - } up_down_event; -} ip6_icmp_neighbor_discovery_event_data_t; - -static ip6_neighbor_main_t ip6_neighbor_main; -ip6_neighbor_public_main_t ip6_neighbor_public_main; -static ip6_address_t ip6a_zero; /* ip6 address 0 */ - -static void wc_nd_signal_report (wc_nd_report_t * r); -static void ra_signal_report (ra_report_t * r); - -ip6_address_t -ip6_neighbor_get_link_local_address (u32 sw_if_index) -{ - static ip6_address_t empty_address = { {0} }; - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_radv_t *radv_info; - u32 ri = ~0; - - if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index) - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - if (ri == ~0) - { - clib_warning ("IPv6 is not enabled for sw_if_index %d", sw_if_index); - return empty_address; - } - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - if (radv_info == NULL) - { - clib_warning ("Internal error"); - return empty_address; - } - return radv_info->link_local_address; -} - -/** - * @brief publish wildcard arp event - * @param sw_if_index The interface on which the ARP entries are acted - */ -static int -vnet_nd_wc_publish (u32 sw_if_index, - const mac_address_t * mac, const ip6_address_t * ip6) -{ - wc_nd_report_t r = { - .sw_if_index = sw_if_index, - .ip6 = *ip6, - .mac = *mac, - }; - - vl_api_rpc_call_main_thread (wc_nd_signal_report, (u8 *) & r, sizeof r); - return 0; -} - -static void -wc_nd_signal_report (wc_nd_report_t * r) -{ - vlib_main_t *vm = vlib_get_main (); - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - uword ni = nm->wc_ip6_nd_publisher_node; - uword et = nm->wc_ip6_nd_publisher_et; - - if (ni == (uword) ~ 0) - return; - wc_nd_report_t *q = - vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q); - - *q = *r; -} - -void -wc_nd_set_publisher_node (uword node_index, uword event_type) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - nm->wc_ip6_nd_publisher_node = node_index; - nm->wc_ip6_nd_publisher_et = event_type; -} - -static int -ra_publish (ra_report_t * r) -{ - void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length); - vl_api_rpc_call_main_thread (ra_signal_report, (u8 *) r, sizeof *r); - return 0; -} - -static void -ra_signal_report (ra_report_t * r) -{ - vlib_main_t *vm = vlib_get_main (); - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - uword ni = nm->ip6_ra_publisher_node; - uword et = nm->ip6_ra_publisher_et; - - if (ni == (uword) ~ 0) - return; - ra_report_t *q = vlib_process_signal_event_data (vm, ni, et, 1, sizeof *q); - - *q = *r; -} - -void -ra_set_publisher_node (uword node_index, uword event_type) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - nm->ip6_ra_publisher_node = node_index; - nm->ip6_ra_publisher_et = event_type; -} - -static u8 * -format_ip6_neighbor_ip6_entry (u8 * s, va_list * va) -{ - vlib_main_t *vm = va_arg (*va, vlib_main_t *); - ip6_neighbor_t *n = va_arg (*va, ip6_neighbor_t *); - vnet_main_t *vnm = vnet_get_main (); - vnet_sw_interface_t *si; - - if (!n) - return format (s, "%=12s%=45s%=6s%=20s%=40s", "Time", "Address", "Flags", - "Link layer", "Interface"); - - si = vnet_get_sw_interface (vnm, n->key.sw_if_index); - - return format (s, "%=12U%=45U%=6U%=20U%=40U", - format_vlib_time, vm, n->time_last_updated, - format_ip6_address, &n->key.ip6_address, - format_ip_neighbor_flags, n->flags, - format_mac_address_t, &n->mac, - format_vnet_sw_interface_name, vnm, si); -} - -static void -ip6_neighbor_adj_fib_remove (ip6_neighbor_t * n, u32 fib_index) -{ - if (FIB_NODE_INDEX_INVALID != n->fib_entry_index) - { - if (ip6_address_is_link_local_unicast (&n->key.ip6_address)) - { - ip6_ll_prefix_t pfx = { - .ilp_addr = n->key.ip6_address, - .ilp_sw_if_index = n->key.sw_if_index, - }; - ip6_ll_table_entry_delete (&pfx); - } - else - { - fib_prefix_t pfx = { - .fp_len = 128, - .fp_proto = FIB_PROTOCOL_IP6, - .fp_addr.ip6 = n->key.ip6_address, - }; - fib_table_entry_path_remove (fib_index, - &pfx, - FIB_SOURCE_ADJ, - DPO_PROTO_IP6, - &pfx.fp_addr, - n->key.sw_if_index, ~0, - 1, FIB_ROUTE_PATH_FLAG_NONE); - } - } -} - -typedef struct -{ - u8 is_add; - ip_neighbor_flags_t flags; - mac_address_t mac; - u32 sw_if_index; - ip6_address_t addr; -} ip6_neighbor_set_unset_rpc_args_t; - -static void ip6_neighbor_set_unset_rpc_callback - (ip6_neighbor_set_unset_rpc_args_t * a); - -static void set_unset_ip6_neighbor_rpc - (vlib_main_t * vm, - u32 sw_if_index, - const ip6_address_t * a, - const mac_address_t * mac, int is_add, ip_neighbor_flags_t flags) -{ - ip6_neighbor_set_unset_rpc_args_t args; - void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length); - - args.sw_if_index = sw_if_index; - args.is_add = is_add; - args.flags = flags; - ip6_address_copy (&args.addr, a); - mac_address_copy (&args.mac, mac); - - vl_api_rpc_call_main_thread (ip6_neighbor_set_unset_rpc_callback, - (u8 *) & args, sizeof (args)); -} - -static void -ip6_nbr_probe (ip_adjacency_t * adj) -{ - icmp6_neighbor_solicitation_header_t *h; - vnet_main_t *vnm = vnet_get_main (); - ip6_main_t *im = &ip6_main; - ip_interface_address_t *ia; - ip6_address_t *dst, *src; - vnet_hw_interface_t *hi; - vnet_sw_interface_t *si; - vlib_buffer_t *b; - int bogus_length; - vlib_main_t *vm; - u32 bi = 0; - - vm = vlib_get_main (); - - si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index); - dst = &adj->sub_type.nbr.next_hop.ip6; - - if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)) - { - return; - } - src = ip6_interface_address_matching_destination (im, dst, - adj->rewrite_header. - sw_if_index, &ia); - if (!src) - { - return; - } - - h = vlib_packet_template_get_packet (vm, - &im->discover_neighbor_packet_template, - &bi); - if (!h) - return; - - hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index); - - h->ip.dst_address.as_u8[13] = dst->as_u8[13]; - h->ip.dst_address.as_u8[14] = dst->as_u8[14]; - h->ip.dst_address.as_u8[15] = dst->as_u8[15]; - h->ip.src_address = src[0]; - h->neighbor.target_address = dst[0]; - - clib_memcpy (h->link_layer_option.ethernet_address, - hi->hw_address, vec_len (hi->hw_address)); - - h->neighbor.icmp.checksum = - ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length); - ASSERT (bogus_length == 0); - - b = vlib_get_buffer (vm, bi); - vnet_buffer (b)->sw_if_index[VLIB_RX] = - vnet_buffer (b)->sw_if_index[VLIB_TX] = adj->rewrite_header.sw_if_index; - - /* Add encapsulation string for software interface (e.g. ethernet header). */ - vnet_rewrite_one_header (adj[0], h, sizeof (ethernet_header_t)); - vlib_buffer_advance (b, -adj->rewrite_header.data_bytes); - - { - vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index); - u32 *to_next = vlib_frame_vector_args (f); - to_next[0] = bi; - f->n_vectors = 1; - vlib_put_frame_to_node (vm, hi->output_node_index, f); - } -} - -static void -ip6_nd_mk_complete (adj_index_t ai, ip6_neighbor_t * nbr) -{ - adj_nbr_update_rewrite (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE, - ethernet_build_rewrite (vnet_get_main (), - nbr->key.sw_if_index, - adj_get_link_type (ai), - nbr->mac.bytes)); -} - -static void -ip6_nd_mk_incomplete (adj_index_t ai) -{ - ip_adjacency_t *adj = adj_get (ai); - - adj_nbr_update_rewrite (ai, - ADJ_NBR_REWRITE_FLAG_INCOMPLETE, - ethernet_build_rewrite (vnet_get_main (), - adj->rewrite_header. - sw_if_index, - adj_get_link_type (ai), - VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST)); -} - -#define IP6_NBR_MK_KEY(k, sw_if_index, addr) \ -{ \ - k.sw_if_index = sw_if_index; \ - k.ip6_address = *addr; \ - k.pad = 0; \ -} - -static ip6_neighbor_t * -ip6_nd_find (u32 sw_if_index, const ip6_address_t * addr) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_neighbor_t *n = NULL; - ip6_neighbor_key_t k; - uword *p; - - IP6_NBR_MK_KEY (k, sw_if_index, addr); - - p = mhash_get (&nm->neighbor_index_by_key, &k); - if (p) - { - n = pool_elt_at_index (nm->neighbor_pool, p[0]); - } - - return (n); -} - -static adj_walk_rc_t -ip6_nd_mk_complete_walk (adj_index_t ai, void *ctx) -{ - ip6_neighbor_t *nbr = ctx; - - ip6_nd_mk_complete (ai, nbr); - - return (ADJ_WALK_RC_CONTINUE); -} - -static adj_walk_rc_t -ip6_nd_mk_incomplete_walk (adj_index_t ai, void *ctx) -{ - ip6_nd_mk_incomplete (ai); - - return (ADJ_WALK_RC_CONTINUE); -} - -static clib_error_t * -ip6_neighbor_sw_interface_up_down (vnet_main_t * vnm, - u32 sw_if_index, u32 flags) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_neighbor_t *n; - u32 i, *to_delete = 0; - - /* *INDENT-OFF* */ - pool_foreach (n, nm->neighbor_pool, - ({ - if (n->key.sw_if_index == sw_if_index) - vec_add1 (to_delete, n - nm->neighbor_pool); - })); - /* *INDENT-ON* */ - - if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) - { - for (i = 0; i < vec_len (to_delete); i++) - { - n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]); - adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address, - ip6_nd_mk_complete_walk, n); - } - } - else - { - for (i = 0; i < vec_len (to_delete); i++) - { - n = pool_elt_at_index (nm->neighbor_pool, to_delete[i]); - adj_nbr_walk_nh6 (n->key.sw_if_index, &n->key.ip6_address, - ip6_nd_mk_incomplete_walk, NULL); - if (n->flags & IP_NEIGHBOR_FLAG_STATIC) - continue; - ip6_neighbor_adj_fib_remove (n, - ip6_fib_table_get_index_for_sw_if_index - (n->key.sw_if_index)); - mhash_unset (&nm->neighbor_index_by_key, &n->key, 0); - pool_put (nm->neighbor_pool, n); - } - } - - vec_free (to_delete); - return 0; -} - -VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ip6_neighbor_sw_interface_up_down); - -void -ip6_ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai) -{ - ip6_neighbor_t *nbr; - ip_adjacency_t *adj; - - adj = adj_get (ai); - - nbr = ip6_nd_find (sw_if_index, &adj->sub_type.nbr.next_hop.ip6); - - switch (adj->lookup_next_index) - { - case IP_LOOKUP_NEXT_GLEAN: - adj_glean_update_rewrite (ai); - break; - case IP_LOOKUP_NEXT_ARP: - if (NULL != nbr) - { - adj_nbr_walk_nh6 (sw_if_index, &nbr->key.ip6_address, - ip6_nd_mk_complete_walk, nbr); - } - else - { - /* - * no matching ND entry. - * construct the rewrite required to for an ND packet, and stick - * that in the adj's pipe to smoke. - */ - adj_nbr_update_rewrite (ai, - ADJ_NBR_REWRITE_FLAG_INCOMPLETE, - ethernet_build_rewrite (vnm, - sw_if_index, - VNET_LINK_IP6, - VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST)); - - /* - * since the FIB has added this adj for a route, it makes sense it may - * want to forward traffic sometime soon. Let's send a speculative ND. - * just one. If we were to do periodically that wouldn't be bad either, - * but that's more code than i'm prepared to write at this time for - * relatively little reward. - */ - ip6_nbr_probe (adj); - } - break; - case IP_LOOKUP_NEXT_BCAST: - adj_nbr_update_rewrite (ai, - ADJ_NBR_REWRITE_FLAG_COMPLETE, - ethernet_build_rewrite (vnm, - sw_if_index, - VNET_LINK_IP6, - VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST)); - break; - case IP_LOOKUP_NEXT_MCAST: - { - /* - * Construct a partial rewrite from the known ethernet mcast dest MAC - */ - u8 *rewrite; - u8 offset; - - rewrite = ethernet_build_rewrite (vnm, - sw_if_index, - adj->ia_link, - ethernet_ip6_mcast_dst_addr ()); - - /* - * Complete the remaining fields of the adj's rewrite to direct the - * complete of the rewrite at switch time by copying in the IP - * dst address's bytes. - * Ofset is 2 bytes into the destintation address. - */ - offset = vec_len (rewrite) - 2; - adj_mcast_update_rewrite (ai, rewrite, offset); - - break; - } - case IP_LOOKUP_NEXT_DROP: - case IP_LOOKUP_NEXT_PUNT: - case IP_LOOKUP_NEXT_LOCAL: - case IP_LOOKUP_NEXT_REWRITE: - case IP_LOOKUP_NEXT_MCAST_MIDCHAIN: - case IP_LOOKUP_NEXT_MIDCHAIN: - case IP_LOOKUP_NEXT_ICMP_ERROR: - case IP_LOOKUP_N_NEXT: - ASSERT (0); - break; - } -} - - -static void -ip6_neighbor_adj_fib_add (ip6_neighbor_t * n, u32 fib_index) -{ - if (ip6_address_is_link_local_unicast (&n->key.ip6_address)) - { - ip6_ll_prefix_t pfx = { - .ilp_addr = n->key.ip6_address, - .ilp_sw_if_index = n->key.sw_if_index, - }; - n->fib_entry_index = - ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_FLAG_NONE); - } - else - { - fib_prefix_t pfx = { - .fp_len = 128, - .fp_proto = FIB_PROTOCOL_IP6, - .fp_addr.ip6 = n->key.ip6_address, - }; - - n->fib_entry_index = - fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ, - FIB_ENTRY_FLAG_ATTACHED, - DPO_PROTO_IP6, &pfx.fp_addr, - n->key.sw_if_index, ~0, 1, NULL, - FIB_ROUTE_PATH_FLAG_NONE); - } -} - -static ip6_neighbor_t * -force_reuse_neighbor_entry (void) -{ - ip6_neighbor_t *n; - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - u32 count = 0; - u32 index = pool_next_index (nm->neighbor_pool, nm->neighbor_delete_rotor); - if (index == ~0) /* Try again from elt 0 */ - index = pool_next_index (nm->neighbor_pool, index); - - /* Find a non-static random entry to free up for reuse */ - do - { - if ((count++ == 100) || (index == ~0)) - return NULL; /* give up after 100 entries */ - n = pool_elt_at_index (nm->neighbor_pool, index); - nm->neighbor_delete_rotor = index; - index = pool_next_index (nm->neighbor_pool, index); - } - while (n->flags & IP_NEIGHBOR_FLAG_STATIC); - - /* Remove ARP entry from its interface and update fib */ - adj_nbr_walk_nh6 (n->key.sw_if_index, - &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL); - ip6_neighbor_adj_fib_remove - (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index)); - mhash_unset (&nm->neighbor_index_by_key, &n->key, 0); - - return n; -} - -int -vnet_set_ip6_ethernet_neighbor (vlib_main_t * vm, - u32 sw_if_index, - const ip6_address_t * a, - const mac_address_t * mac, - ip_neighbor_flags_t flags) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_neighbor_key_t k; - ip6_neighbor_t *n = 0; - int make_new_nd_cache_entry = 1; - uword *p; - u32 next_index; - pending_resolution_t *pr, *mc; - - if (vlib_get_thread_index ()) - { - set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, mac, 1, flags); - return 0; - } - - k.sw_if_index = sw_if_index; - k.ip6_address = a[0]; - k.pad = 0; - - p = mhash_get (&nm->neighbor_index_by_key, &k); - if (p) - { - n = pool_elt_at_index (nm->neighbor_pool, p[0]); - /* Refuse to over-write static neighbor entry. */ - if (!(flags & IP_NEIGHBOR_FLAG_STATIC) && - (n->flags & IP_NEIGHBOR_FLAG_STATIC)) - { - /* if MAC address match, still check to send event */ - if (0 == mac_address_cmp (&n->mac, mac)) - goto check_customers; - return -2; - } - make_new_nd_cache_entry = 0; - } - - if (make_new_nd_cache_entry) - { - if (nm->limit_neighbor_cache_size && - pool_elts (nm->neighbor_pool) >= nm->limit_neighbor_cache_size) - { - n = force_reuse_neighbor_entry (); - if (NULL == n) - return -2; - } - else - { - pool_get (nm->neighbor_pool, n); - memset (n, 0, sizeof (*n)); - } - - mhash_set (&nm->neighbor_index_by_key, &k, n - nm->neighbor_pool, - /* old value */ 0); - n->key = k; - n->fib_entry_index = FIB_NODE_INDEX_INVALID; - - mac_address_copy (&n->mac, mac); - - /* - * create the adj-fib. the entry in the FIB table for and to the peer. - */ - if (!(flags & IP_NEIGHBOR_FLAG_NO_FIB_ENTRY)) - { - ip6_neighbor_adj_fib_add - (n, ip6_fib_table_get_index_for_sw_if_index (n->key.sw_if_index)); - } - else - { - n->flags |= IP_NEIGHBOR_FLAG_NO_FIB_ENTRY; - } - } - else - { - /* - * prevent a DoS attack from the data-plane that - * spams us with no-op updates to the MAC address - */ - if (0 == mac_address_cmp (&n->mac, mac)) - { - n->time_last_updated = vlib_time_now (vm); - goto check_customers; - } - - mac_address_copy (&n->mac, mac); - } - - /* Update time stamp and flags. */ - n->time_last_updated = vlib_time_now (vm); - if (flags & IP_NEIGHBOR_FLAG_STATIC) - { - n->flags |= IP_NEIGHBOR_FLAG_STATIC; - n->flags &= ~IP_NEIGHBOR_FLAG_DYNAMIC; - } - else - { - n->flags |= IP_NEIGHBOR_FLAG_DYNAMIC; - n->flags &= ~IP_NEIGHBOR_FLAG_STATIC; - } - - adj_nbr_walk_nh6 (sw_if_index, - &n->key.ip6_address, ip6_nd_mk_complete_walk, n); - -check_customers: - /* Customer(s) waiting for this address to be resolved? */ - p = mhash_get (&nm->pending_resolutions_by_address, a); - if (p) - { - next_index = p[0]; - - while (next_index != (u32) ~ 0) - { - pr = pool_elt_at_index (nm->pending_resolutions, next_index); - vlib_process_signal_event (vm, pr->node_index, - pr->type_opaque, pr->data); - next_index = pr->next_index; - pool_put (nm->pending_resolutions, pr); - } - - mhash_unset (&nm->pending_resolutions_by_address, (void *) a, 0); - } - - /* Customer(s) requesting ND event for this address? */ - p = mhash_get (&nm->mac_changes_by_address, a); - if (p) - { - next_index = p[0]; - - while (next_index != (u32) ~ 0) - { - int rv = 1; - - mc = pool_elt_at_index (nm->mac_changes, next_index); - - /* Call the user's data callback, return 1 to suppress dup events */ - if (mc->data_callback) - rv = (mc->data_callback) (mc->data, mac, sw_if_index, &ip6a_zero); - /* - * Signal the resolver process, as long as the user - * says they want to be notified - */ - if (rv == 0) - vlib_process_signal_event (vm, mc->node_index, - mc->type_opaque, mc->data); - next_index = mc->next_index; - } - } - - return 0; -} - -int -vnet_unset_ip6_ethernet_neighbor (vlib_main_t * vm, - u32 sw_if_index, const ip6_address_t * a) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_neighbor_key_t k; - ip6_neighbor_t *n; - uword *p; - int rv = 0; - - if (vlib_get_thread_index ()) - { - set_unset_ip6_neighbor_rpc (vm, sw_if_index, a, NULL, 0, - IP_NEIGHBOR_FLAG_NONE); - return 0; - } - - k.sw_if_index = sw_if_index; - k.ip6_address = a[0]; - k.pad = 0; - - p = mhash_get (&nm->neighbor_index_by_key, &k); - if (p == 0) - { - rv = -1; - goto out; - } - - n = pool_elt_at_index (nm->neighbor_pool, p[0]); - - adj_nbr_walk_nh6 (sw_if_index, - &n->key.ip6_address, ip6_nd_mk_incomplete_walk, NULL); - ip6_neighbor_adj_fib_remove - (n, ip6_fib_table_get_index_for_sw_if_index (sw_if_index)); - - mhash_unset (&nm->neighbor_index_by_key, &n->key, 0); - pool_put (nm->neighbor_pool, n); - -out: - return rv; -} - -static void ip6_neighbor_set_unset_rpc_callback - (ip6_neighbor_set_unset_rpc_args_t * a) -{ - vlib_main_t *vm = vlib_get_main (); - if (a->is_add) - vnet_set_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr, - &a->mac, a->flags); - else - vnet_unset_ip6_ethernet_neighbor (vm, a->sw_if_index, &a->addr); -} - -static int -ip6_neighbor_sort (void *a1, void *a2) -{ - vnet_main_t *vnm = vnet_get_main (); - ip6_neighbor_t *n1 = a1, *n2 = a2; - int cmp; - cmp = vnet_sw_interface_compare (vnm, n1->key.sw_if_index, - n2->key.sw_if_index); - if (!cmp) - cmp = ip6_address_compare (&n1->key.ip6_address, &n2->key.ip6_address); - return cmp; -} - -ip6_neighbor_t * -ip6_neighbors_pool (void) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - return nm->neighbor_pool; -} - -ip6_neighbor_t * -ip6_neighbors_entries (u32 sw_if_index) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_neighbor_t *n, *ns = NULL; - - /* *INDENT-OFF* */ - pool_foreach (n, nm->neighbor_pool, - ({ - if (sw_if_index != ~0 && n->key.sw_if_index != sw_if_index) - continue; - vec_add1 (ns, n[0]); - })); - /* *INDENT-ON* */ - - if (ns) - vec_sort_with_function (ns, ip6_neighbor_sort); - return ns; -} - -static clib_error_t * -show_ip6_neighbors (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - vnet_main_t *vnm = vnet_get_main (); - ip6_neighbor_t *n, *ns; - clib_error_t *error = 0; - u32 sw_if_index; - int verbose = 0; - - if (unformat (input, "verbose")) - verbose = 1; - - /* Filter entries by interface if given. */ - sw_if_index = ~0; - (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index); - - ns = ip6_neighbors_entries (sw_if_index); - if (ns) - { - /* - * Show the entire table if it's not too big, otherwise just - * show the size of the table. - */ - if (vec_len (ns) < 50) - verbose = 1; - if (verbose) - { - vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, 0); - vec_foreach (n, ns) - { - vlib_cli_output (vm, "%U", format_ip6_neighbor_ip6_entry, vm, n); - } - } - else - vlib_cli_output - (vm, "There are %u ip6 neighbors, " - "'show ip6 neighbors verbose' to display the entire table...", - vec_len (ns)); - vec_free (ns); - } - else - vlib_cli_output (vm, "No ip6 neighbors"); - - return error; -} - -/*? - * This command is used to display the adjacent IPv6 hosts found via - * neighbor discovery. Optionally, limit the output to the specified - * interface. - * - * @cliexpar - * Example of how to display the IPv6 neighbor adjacency table: - * @cliexstart{show ip6 neighbors} - * Time Address Flags Link layer Interface - * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0 - * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0 - * 886.6654 ::1:1:c:0:9 S 02:fe:e4:45:27:5b GigabitEthernet3/0/0 - * @cliexend - * Example of how to display the IPv6 neighbor adjacency table for given interface: - * @cliexstart{show ip6 neighbors GigabitEthernet2/0/0} - * Time Address Flags Link layer Interface - * 34.0910 ::a:1:1:0:7 02:fe:6a:07:39:6f GigabitEthernet2/0/0 - * 173.2916 ::b:5:1:c:2 02:fe:50:62:3a:94 GigabitEthernet2/0/0 - * @cliexend -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (show_ip6_neighbors_command, static) = { - .path = "show ip6 neighbors", - .function = show_ip6_neighbors, - .short_help = "show ip6 neighbors [<interface>]", -}; -/* *INDENT-ON* */ - -static clib_error_t * -set_ip6_neighbor (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - ip_neighbor_flags_t flags = IP_NEIGHBOR_FLAG_NONE; - vnet_main_t *vnm = vnet_get_main (); - ip6_address_t addr; - mac_address_t mac; - int addr_valid = 0; - int is_del = 0; - u32 sw_if_index; - - while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) - { - /* intfc, ip6-address, mac-address */ - if (unformat (input, "%U %U %U", - unformat_vnet_sw_interface, vnm, &sw_if_index, - unformat_ip6_address, &addr, - unformat_mac_address_t, &mac)) - addr_valid = 1; - - else if (unformat (input, "delete") || unformat (input, "del")) - is_del = 1; - else if (unformat (input, "static")) - flags |= IP_NEIGHBOR_FLAG_STATIC; - else if (unformat (input, "no-fib-entry")) - flags |= IP_NEIGHBOR_FLAG_NO_FIB_ENTRY; - else - break; - } - - if (!addr_valid) - return clib_error_return (0, "Missing interface, ip6 or hw address"); - - if (!is_del) - vnet_set_ip6_ethernet_neighbor (vm, sw_if_index, &addr, &mac, flags); - else - vnet_unset_ip6_ethernet_neighbor (vm, sw_if_index, &addr); - return 0; -} - -/*? - * This command is used to manually add an entry to the IPv6 neighbor - * adjacency table. Optionally, the entry can be added as static. It is - * also used to remove an entry from the table. Use the '<em>show ip6 - * neighbors</em>' command to display all learned and manually entered entries. - * - * @cliexpar - * Example of how to add a static entry to the IPv6 neighbor adjacency table: - * @cliexcmd{set ip6 neighbor GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b static} - * Example of how to delete an entry from the IPv6 neighbor adjacency table: - * @cliexcmd{set ip6 neighbor del GigabitEthernet2/0/0 ::1:1:c:0:9 02:fe:e4:45:27:5b} -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (set_ip6_neighbor_command, static) = -{ - .path = "set ip6 neighbor", - .function = set_ip6_neighbor, - .short_help = "set ip6 neighbor [del] <interface> <ip6-address> <mac-address> [static]", -}; -/* *INDENT-ON* */ - -typedef enum -{ - ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP, - ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY, - ICMP6_NEIGHBOR_SOLICITATION_N_NEXT, -} icmp6_neighbor_solicitation_or_advertisement_next_t; - -static_always_inline uword -icmp6_neighbor_solicitation_or_advertisement (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, - uword is_solicitation) -{ - vnet_main_t *vnm = vnet_get_main (); - ip6_main_t *im = &ip6_main; - uword n_packets = frame->n_vectors; - u32 *from, *to_next; - u32 n_left_from, n_left_to_next, next_index, n_advertisements_sent; - icmp6_neighbor_discovery_option_type_t option_type; - vlib_node_runtime_t *error_node = - vlib_node_get_runtime (vm, ip6_icmp_input_node.index); - int bogus_length; - - from = vlib_frame_vector_args (frame); - n_left_from = n_packets; - next_index = node->cached_next_index; - - if (node->flags & VLIB_NODE_FLAG_TRACE) - vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, - /* stride */ 1, - sizeof (icmp6_input_trace_t)); - - option_type = - (is_solicitation - ? ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address - : ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address); - n_advertisements_sent = 0; - - while (n_left_from > 0) - { - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - vlib_buffer_t *p0; - ip6_header_t *ip0; - icmp6_neighbor_solicitation_or_advertisement_header_t *h0; - icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0; - u32 bi0, options_len0, sw_if_index0, next0, error0; - u32 ip6_sadd_link_local, ip6_sadd_unspecified; - int is_rewrite0; - u32 ni0; - - bi0 = to_next[0] = from[0]; - - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - p0 = vlib_get_buffer (vm, bi0); - ip0 = vlib_buffer_get_current (p0); - h0 = ip6_next_header (ip0); - options_len0 = - clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]); - - error0 = ICMP6_ERROR_NONE; - sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; - ip6_sadd_link_local = - ip6_address_is_link_local_unicast (&ip0->src_address); - ip6_sadd_unspecified = - ip6_address_is_unspecified (&ip0->src_address); - - /* Check that source address is unspecified, link-local or else on-link. */ - if (!ip6_sadd_unspecified && !ip6_sadd_link_local) - { - u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0); - - if (ADJ_INDEX_INVALID != src_adj_index0) - { - ip_adjacency_t *adj0 = adj_get (src_adj_index0); - - /* Allow all realistic-looking rewrite adjacencies to pass */ - ni0 = adj0->lookup_next_index; - is_rewrite0 = (ni0 >= IP_LOOKUP_NEXT_ARP) && - (ni0 < IP6_LOOKUP_N_NEXT); - - error0 = ((adj0->rewrite_header.sw_if_index != sw_if_index0 - || !is_rewrite0) - ? - ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK - : error0); - } - else - { - error0 = - ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_NOT_ON_LINK; - } - } - - o0 = (void *) (h0 + 1); - o0 = ((options_len0 == 8 && o0->header.type == option_type - && o0->header.n_data_u64s == 1) ? o0 : 0); - - /* If src address unspecified or link local, donot learn neighbor MAC */ - if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 && - !ip6_sadd_unspecified)) - { - vnet_set_ip6_ethernet_neighbor (vm, sw_if_index0, - is_solicitation ? - &ip0->src_address : - &h0->target_address, - (mac_address_t *) - o0->ethernet_address, - IP_NEIGHBOR_FLAG_NONE); - } - - if (is_solicitation && error0 == ICMP6_ERROR_NONE) - { - /* Check that target address is local to this router. */ - fib_node_index_t fei; - u32 fib_index; - - fib_index = - ip6_fib_table_get_index_for_sw_if_index (sw_if_index0); - - if (~0 == fib_index) - { - error0 = ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN; - } - else - { - if (ip6_address_is_link_local_unicast (&h0->target_address)) - { - fei = ip6_fib_table_lookup_exact_match - (ip6_ll_fib_get (sw_if_index0), - &h0->target_address, 128); - } - else - { - fei = ip6_fib_table_lookup_exact_match (fib_index, - &h0->target_address, - 128); - } - - if (FIB_NODE_INDEX_INVALID == fei) - { - /* The target address is not in the FIB */ - error0 = - ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN; - } - else - { - if (FIB_ENTRY_FLAG_LOCAL & - fib_entry_get_flags_for_source (fei, - FIB_SOURCE_INTERFACE)) - { - /* It's an address that belongs to one of our interfaces - * that's good. */ - } - else - if (fib_entry_is_sourced - (fei, FIB_SOURCE_IP6_ND_PROXY) || - fib_entry_is_sourced (fei, FIB_SOURCE_IP6_ND)) - { - /* The address was added by IPv6 Proxy ND config. - * We should only respond to these if the NS arrived on - * the link that has a matching covering prefix */ - } - else - { - error0 = - ICMP6_ERROR_NEIGHBOR_SOLICITATION_SOURCE_UNKNOWN; - } - } - } - } - - if (is_solicitation) - next0 = (error0 != ICMP6_ERROR_NONE - ? ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP - : ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY); - else - { - next0 = 0; - error0 = error0 == ICMP6_ERROR_NONE ? - ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_RX : error0; - } - - if (is_solicitation && error0 == ICMP6_ERROR_NONE) - { - vnet_sw_interface_t *sw_if0; - ethernet_interface_t *eth_if0; - ethernet_header_t *eth0; - - /* dst address is either source address or the all-nodes mcast addr */ - if (!ip6_sadd_unspecified) - ip0->dst_address = ip0->src_address; - else - ip6_set_reserved_multicast_address (&ip0->dst_address, - IP6_MULTICAST_SCOPE_link_local, - IP6_MULTICAST_GROUP_ID_all_hosts); - - ip0->src_address = h0->target_address; - ip0->hop_limit = 255; - h0->icmp.type = ICMP6_neighbor_advertisement; - - sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0); - ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE); - eth_if0 = - ethernet_get_interface (ðernet_main, sw_if0->hw_if_index); - if (eth_if0 && o0) - { - clib_memcpy (o0->ethernet_address, eth_if0->address, 6); - o0->header.type = - ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address; - } - - h0->advertisement_flags = clib_host_to_net_u32 - (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED - | ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE); - - h0->icmp.checksum = 0; - h0->icmp.checksum = - ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, - &bogus_length); - ASSERT (bogus_length == 0); - - /* Reuse current MAC header, copy SMAC to DMAC and - * interface MAC to SMAC */ - vlib_buffer_advance (p0, -ethernet_buffer_header_size (p0)); - eth0 = vlib_buffer_get_current (p0); - clib_memcpy (eth0->dst_address, eth0->src_address, 6); - if (eth_if0) - clib_memcpy (eth0->src_address, eth_if0->address, 6); - - /* Setup input and output sw_if_index for packet */ - ASSERT (vnet_buffer (p0)->sw_if_index[VLIB_RX] == sw_if_index0); - vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0; - vnet_buffer (p0)->sw_if_index[VLIB_RX] = - vnet_main.local_interface_sw_if_index; - - n_advertisements_sent++; - } - - p0->error = error_node->errors[error0]; - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, - bi0, next0); - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - /* Account for advertisements sent. */ - vlib_error_count (vm, error_node->node_index, - ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, - n_advertisements_sent); - - return frame->n_vectors; -} - -/* for "syslogging" - use elog for now */ -#define foreach_log_level \ - _ (DEBUG, "DEBUG") \ - _ (INFO, "INFORMATION") \ - _ (NOTICE, "NOTICE") \ - _ (WARNING, "WARNING") \ - _ (ERR, "ERROR") \ - _ (CRIT, "CRITICAL") \ - _ (ALERT, "ALERT") \ - _ (EMERG, "EMERGENCY") - -typedef enum -{ -#define _(f,s) LOG_##f, - foreach_log_level -#undef _ -} log_level_t; - -static char *log_level_strings[] = { -#define _(f,s) s, - foreach_log_level -#undef _ -}; - -static int logmask = 1 << LOG_DEBUG; - -static void -ip6_neighbor_syslog (vlib_main_t * vm, int priority, char *fmt, ...) -{ - /* just use elog for now */ - u8 *what; - va_list va; - - if ((priority > LOG_EMERG) || !(logmask & (1 << priority))) - return; - - va_start (va, fmt); - if (fmt) - { - what = va_format (0, fmt, &va); - - ELOG_TYPE_DECLARE (e) = - { - .format = "ip6 nd: (%s): %s",.format_args = "T4T4",}; - struct - { - u32 s[2]; - } *ed; - ed = ELOG_DATA (&vm->elog_main, e); - ed->s[0] = elog_string (&vm->elog_main, log_level_strings[priority]); - ed->s[1] = elog_string (&vm->elog_main, (char *) what); - } - va_end (va); - return; -} - -clib_error_t * -call_ip6_neighbor_callbacks (void *data, - _vnet_ip6_neighbor_function_list_elt_t * elt) -{ - clib_error_t *error = 0; - - while (elt) - { - error = elt->fp (data); - if (error) - return error; - elt = elt->next_ip6_neighbor_function; - } - - return error; -} - -/* ipv6 neighbor discovery - router advertisements */ -typedef enum -{ - ICMP6_ROUTER_SOLICITATION_NEXT_DROP, - ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW, - ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX, - ICMP6_ROUTER_SOLICITATION_N_NEXT, -} icmp6_router_solicitation_or_advertisement_next_t; - -static_always_inline uword -icmp6_router_solicitation (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - vnet_main_t *vnm = vnet_get_main (); - ip6_main_t *im = &ip6_main; - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - uword n_packets = frame->n_vectors; - u32 *from, *to_next; - u32 n_left_from, n_left_to_next, next_index; - u32 n_advertisements_sent = 0; - int bogus_length; - - icmp6_neighbor_discovery_option_type_t option_type; - - vlib_node_runtime_t *error_node = - vlib_node_get_runtime (vm, ip6_icmp_input_node.index); - - from = vlib_frame_vector_args (frame); - n_left_from = n_packets; - next_index = node->cached_next_index; - - if (node->flags & VLIB_NODE_FLAG_TRACE) - vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, - /* stride */ 1, - sizeof (icmp6_input_trace_t)); - - /* source may append his LL address */ - option_type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address; - - while (n_left_from > 0) - { - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - vlib_buffer_t *p0; - ip6_header_t *ip0; - ip6_radv_t *radv_info = 0; - - icmp6_neighbor_discovery_header_t *h0; - icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *o0; - - u32 bi0, options_len0, sw_if_index0, next0, error0; - u32 is_solicitation = 1, is_dropped = 0; - u32 is_unspecified, is_link_local; - - bi0 = to_next[0] = from[0]; - - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - p0 = vlib_get_buffer (vm, bi0); - ip0 = vlib_buffer_get_current (p0); - h0 = ip6_next_header (ip0); - options_len0 = - clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]); - is_unspecified = ip6_address_is_unspecified (&ip0->src_address); - is_link_local = - ip6_address_is_link_local_unicast (&ip0->src_address); - - error0 = ICMP6_ERROR_NONE; - sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; - - /* check if solicitation (not from nd_timer node) */ - if (ip6_address_is_unspecified (&ip0->dst_address)) - is_solicitation = 0; - - /* Check that source address is unspecified, link-local or else on-link. */ - if (!is_unspecified && !is_link_local) - { - u32 src_adj_index0 = ip6_src_lookup_for_packet (im, p0, ip0); - - if (ADJ_INDEX_INVALID != src_adj_index0) - { - ip_adjacency_t *adj0 = adj_get (src_adj_index0); - - error0 = (adj0->rewrite_header.sw_if_index != sw_if_index0 - ? - ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK - : error0); - } - else - { - error0 = ICMP6_ERROR_ROUTER_SOLICITATION_SOURCE_NOT_ON_LINK; - } - } - - /* check for source LL option and process */ - o0 = (void *) (h0 + 1); - o0 = ((options_len0 == 8 - && o0->header.type == option_type - && o0->header.n_data_u64s == 1) ? o0 : 0); - - /* if src address unspecified IGNORE any options */ - if (PREDICT_TRUE (error0 == ICMP6_ERROR_NONE && o0 != 0 && - !is_unspecified && !is_link_local)) - { - vnet_set_ip6_ethernet_neighbor - (vm, sw_if_index0, - &ip0->src_address, - (mac_address_t *) o0->ethernet_address, - IP_NEIGHBOR_FLAG_NONE); - } - - /* default is to drop */ - next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP; - - if (error0 == ICMP6_ERROR_NONE) - { - vnet_sw_interface_t *sw_if0; - ethernet_interface_t *eth_if0; - u32 adj_index0; - - sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0); - ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE); - eth_if0 = - ethernet_get_interface (ðernet_main, sw_if0->hw_if_index); - - /* only support ethernet interface type for now */ - error0 = - (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF - : error0; - - if (error0 == ICMP6_ERROR_NONE) - { - u32 ri; - - /* adjust the sizeof the buffer to just include the ipv6 header */ - p0->current_length -= - (options_len0 + - sizeof (icmp6_neighbor_discovery_header_t)); - - /* look up the radv_t information for this interface */ - if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > - sw_if_index0) - { - ri = - nm->if_radv_pool_index_by_sw_if_index[sw_if_index0]; - - if (ri != ~0) - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - } - - error0 = - ((!radv_info) ? - ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG : - error0); - - if (error0 == ICMP6_ERROR_NONE) - { - f64 now = vlib_time_now (vm); - - /* for solicited adverts - need to rate limit */ - if (is_solicitation) - { - if (0 != radv_info->last_radv_time && - (now - radv_info->last_radv_time) < - MIN_DELAY_BETWEEN_RAS) - is_dropped = 1; - else - radv_info->last_radv_time = now; - } - - /* send now */ - icmp6_router_advertisement_header_t rh; - - rh.icmp.type = ICMP6_router_advertisement; - rh.icmp.code = 0; - rh.icmp.checksum = 0; - - rh.current_hop_limit = radv_info->curr_hop_limit; - rh.router_lifetime_in_sec = - clib_host_to_net_u16 - (radv_info->adv_router_lifetime_in_sec); - rh. - time_in_msec_between_retransmitted_neighbor_solicitations - = - clib_host_to_net_u32 (radv_info-> - adv_time_in_msec_between_retransmitted_neighbor_solicitations); - rh.neighbor_reachable_time_in_msec = - clib_host_to_net_u32 (radv_info-> - adv_neighbor_reachable_time_in_msec); - - rh.flags = - (radv_info->adv_managed_flag) ? - ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP : - 0; - rh.flags |= - ((radv_info->adv_other_flag) ? - ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP : - 0); - - - u16 payload_length = - sizeof (icmp6_router_advertisement_header_t); - - if (vlib_buffer_add_data - (vm, &bi0, (void *) &rh, - sizeof (icmp6_router_advertisement_header_t))) - { - /* buffer allocation failed, drop the pkt */ - error0 = ICMP6_ERROR_ALLOC_FAILURE; - goto drop0; - } - - if (radv_info->adv_link_layer_address) - { - icmp6_neighbor_discovery_ethernet_link_layer_address_option_t - h; - - h.header.type = - ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address; - h.header.n_data_u64s = 1; - - /* copy ll address */ - clib_memcpy (&h.ethernet_address[0], - eth_if0->address, 6); - - if (vlib_buffer_add_data - (vm, &bi0, (void *) &h, - sizeof - (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t))) - { - error0 = ICMP6_ERROR_ALLOC_FAILURE; - goto drop0; - } - - payload_length += - sizeof - (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t); - } - - /* add MTU option */ - if (radv_info->adv_link_mtu) - { - icmp6_neighbor_discovery_mtu_option_t h; - - h.unused = 0; - h.mtu = - clib_host_to_net_u32 (radv_info->adv_link_mtu); - h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu; - h.header.n_data_u64s = 1; - - payload_length += - sizeof (icmp6_neighbor_discovery_mtu_option_t); - - if (vlib_buffer_add_data - (vm, &bi0, (void *) &h, - sizeof - (icmp6_neighbor_discovery_mtu_option_t))) - { - error0 = ICMP6_ERROR_ALLOC_FAILURE; - goto drop0; - } - } - - /* add advertised prefix options */ - ip6_radv_prefix_t *pr_info; - - /* *INDENT-OFF* */ - pool_foreach (pr_info, radv_info->adv_prefixes_pool, - ({ - if(pr_info->enabled && - (!pr_info->decrement_lifetime_flag - || (pr_info->pref_lifetime_expires >0))) - { - /* advertise this prefix */ - icmp6_neighbor_discovery_prefix_information_option_t h; - - h.header.type = ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information; - h.header.n_data_u64s = (sizeof(icmp6_neighbor_discovery_prefix_information_option_t) >> 3); - - h.dst_address_length = pr_info->prefix_len; - - h.flags = (pr_info->adv_on_link_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_FLAG_ON_LINK : 0; - h.flags |= (pr_info->adv_autonomous_flag) ? ICMP6_NEIGHBOR_DISCOVERY_PREFIX_INFORMATION_AUTO : 0; - - if(radv_info->cease_radv && pr_info->deprecated_prefix_flag) - { - h.valid_time = clib_host_to_net_u32(MIN_ADV_VALID_LIFETIME); - h.preferred_time = 0; - } - else - { - if(pr_info->decrement_lifetime_flag) - { - pr_info->adv_valid_lifetime_in_secs = ((pr_info->valid_lifetime_expires > now)) ? - (pr_info->valid_lifetime_expires - now) : 0; - - pr_info->adv_pref_lifetime_in_secs = ((pr_info->pref_lifetime_expires > now)) ? - (pr_info->pref_lifetime_expires - now) : 0; - } - - h.valid_time = clib_host_to_net_u32(pr_info->adv_valid_lifetime_in_secs); - h.preferred_time = clib_host_to_net_u32(pr_info->adv_pref_lifetime_in_secs) ; - } - h.unused = 0; - - clib_warning ("Prefix %U valid %u preferred %u", - format_ip6_address, &pr_info->prefix, - ntohl(h.valid_time), - ntohl(h.preferred_time)); - - if (h.valid_time == 0) - clib_warning ("WARNING: valid_time 0!!!"); - - clib_memcpy(&h.dst_address, &pr_info->prefix, sizeof(ip6_address_t)); - - payload_length += sizeof( icmp6_neighbor_discovery_prefix_information_option_t); - - if (vlib_buffer_add_data - (vm, &bi0, (void *)&h, - sizeof(icmp6_neighbor_discovery_prefix_information_option_t))) - { - error0 = ICMP6_ERROR_ALLOC_FAILURE; - goto drop0; - } - - } - })); - /* *INDENT-ON* */ - - /* add additional options before here */ - - /* finish building the router advertisement... */ - if (!is_unspecified && radv_info->send_unicast) - { - ip0->dst_address = ip0->src_address; - } - else - { - /* target address is all-nodes mcast addr */ - ip6_set_reserved_multicast_address - (&ip0->dst_address, - IP6_MULTICAST_SCOPE_link_local, - IP6_MULTICAST_GROUP_ID_all_hosts); - } - - /* source address MUST be the link-local address */ - ip0->src_address = radv_info->link_local_address; - - ip0->hop_limit = 255; - ip0->payload_length = - clib_host_to_net_u16 (payload_length); - - icmp6_router_advertisement_header_t *rh0 = - (icmp6_router_advertisement_header_t *) (ip0 + 1); - rh0->icmp.checksum = - ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip0, - &bogus_length); - ASSERT (bogus_length == 0); - - /* setup output if and adjacency */ - vnet_buffer (p0)->sw_if_index[VLIB_RX] = - vnet_main.local_interface_sw_if_index; - - if (is_solicitation) - { - ethernet_header_t *eth0; - /* Reuse current MAC header, copy SMAC to DMAC and - * interface MAC to SMAC */ - vlib_buffer_reset (p0); - eth0 = vlib_buffer_get_current (p0); - clib_memcpy (eth0->dst_address, eth0->src_address, - 6); - clib_memcpy (eth0->src_address, eth_if0->address, - 6); - next0 = - is_dropped ? next0 : - ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX; - vnet_buffer (p0)->sw_if_index[VLIB_TX] = - sw_if_index0; - } - else - { - adj_index0 = radv_info->mcast_adj_index; - if (adj_index0 == ADJ_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; -} - - /* validate advertised info for consistancy (see RFC-4861 section 6.2.7) - log any inconsistencies, packet will always be dropped */ -static_always_inline uword -icmp6_router_advertisement (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - vnet_main_t *vnm = vnet_get_main (); - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - uword n_packets = frame->n_vectors; - u32 *from, *to_next; - u32 n_left_from, n_left_to_next, next_index; - u32 n_advertisements_rcvd = 0; - - vlib_node_runtime_t *error_node = - vlib_node_get_runtime (vm, ip6_icmp_input_node.index); - - from = vlib_frame_vector_args (frame); - n_left_from = n_packets; - next_index = node->cached_next_index; - - if (node->flags & VLIB_NODE_FLAG_TRACE) - vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors, - /* stride */ 1, - sizeof (icmp6_input_trace_t)); - - while (n_left_from > 0) - { - vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); - - while (n_left_from > 0 && n_left_to_next > 0) - { - vlib_buffer_t *p0; - ip6_header_t *ip0; - ip6_radv_t *radv_info = 0; - icmp6_router_advertisement_header_t *h0; - u32 bi0, options_len0, sw_if_index0, next0, error0; - - bi0 = to_next[0] = from[0]; - - from += 1; - to_next += 1; - n_left_from -= 1; - n_left_to_next -= 1; - - p0 = vlib_get_buffer (vm, bi0); - ip0 = vlib_buffer_get_current (p0); - h0 = ip6_next_header (ip0); - options_len0 = - clib_net_to_host_u16 (ip0->payload_length) - sizeof (h0[0]); - - error0 = ICMP6_ERROR_NONE; - sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX]; - - /* Check that source address is link-local */ - error0 = (!ip6_address_is_link_local_unicast (&ip0->src_address)) ? - ICMP6_ERROR_ROUTER_ADVERTISEMENT_SOURCE_NOT_LINK_LOCAL : error0; - - /* default is to drop */ - next0 = ICMP6_ROUTER_SOLICITATION_NEXT_DROP; - - n_advertisements_rcvd++; - - if (error0 == ICMP6_ERROR_NONE) - { - vnet_sw_interface_t *sw_if0; - ethernet_interface_t *eth_if0; - - sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index0); - ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE); - eth_if0 = - ethernet_get_interface (ðernet_main, sw_if0->hw_if_index); - - /* only support ethernet interface type for now */ - error0 = - (!eth_if0) ? ICMP6_ERROR_ROUTER_SOLICITATION_UNSUPPORTED_INTF - : error0; - - if (error0 == ICMP6_ERROR_NONE) - { - u32 ri; - - /* look up the radv_t information for this interface */ - if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > - sw_if_index0) - { - ri = - nm->if_radv_pool_index_by_sw_if_index[sw_if_index0]; - - if (ri != ~0) - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - } - - error0 = - ((!radv_info) ? - ICMP6_ERROR_ROUTER_SOLICITATION_RADV_NOT_CONFIG : - error0); - - if (error0 == ICMP6_ERROR_NONE) - { - radv_info->keep_sending_rs = 0; - - ra_report_t r; - - r.sw_if_index = sw_if_index0; - memcpy (&r.router_address, &ip0->src_address, 16); - r.current_hop_limit = h0->current_hop_limit; - r.flags = h0->flags; - r.router_lifetime_in_sec = - clib_net_to_host_u16 (h0->router_lifetime_in_sec); - r.neighbor_reachable_time_in_msec = - clib_net_to_host_u32 - (h0->neighbor_reachable_time_in_msec); - r.time_in_msec_between_retransmitted_neighbor_solicitations = clib_net_to_host_u32 (h0->time_in_msec_between_retransmitted_neighbor_solicitations); - r.prefixes = 0; - - /* validate advertised information */ - if ((h0->current_hop_limit && radv_info->curr_hop_limit) - && (h0->current_hop_limit != - radv_info->curr_hop_limit)) - { - ip6_neighbor_syslog (vm, LOG_WARNING, - "our AdvCurHopLimit on %U doesn't agree with %U", - format_vnet_sw_if_index_name, - vnm, sw_if_index0, - format_ip6_address, - &ip0->src_address); - } - - if ((h0->flags & - ICMP6_ROUTER_DISCOVERY_FLAG_ADDRESS_CONFIG_VIA_DHCP) - != radv_info->adv_managed_flag) - { - ip6_neighbor_syslog (vm, LOG_WARNING, - "our AdvManagedFlag on %U doesn't agree with %U", - format_vnet_sw_if_index_name, - vnm, sw_if_index0, - format_ip6_address, - &ip0->src_address); - } - - if ((h0->flags & - ICMP6_ROUTER_DISCOVERY_FLAG_OTHER_CONFIG_VIA_DHCP) - != radv_info->adv_other_flag) - { - ip6_neighbor_syslog (vm, LOG_WARNING, - "our AdvOtherConfigFlag on %U doesn't agree with %U", - format_vnet_sw_if_index_name, - vnm, sw_if_index0, - format_ip6_address, - &ip0->src_address); - } - - if ((h0-> - time_in_msec_between_retransmitted_neighbor_solicitations - && radv_info-> - adv_time_in_msec_between_retransmitted_neighbor_solicitations) - && (h0-> - time_in_msec_between_retransmitted_neighbor_solicitations - != - clib_host_to_net_u32 (radv_info-> - adv_time_in_msec_between_retransmitted_neighbor_solicitations))) - { - ip6_neighbor_syslog (vm, LOG_WARNING, - "our AdvRetransTimer on %U doesn't agree with %U", - format_vnet_sw_if_index_name, - vnm, sw_if_index0, - format_ip6_address, - &ip0->src_address); - } - - if ((h0->neighbor_reachable_time_in_msec && - radv_info->adv_neighbor_reachable_time_in_msec) && - (h0->neighbor_reachable_time_in_msec != - clib_host_to_net_u32 - (radv_info->adv_neighbor_reachable_time_in_msec))) - { - ip6_neighbor_syslog (vm, LOG_WARNING, - "our AdvReachableTime on %U doesn't agree with %U", - format_vnet_sw_if_index_name, - vnm, sw_if_index0, - format_ip6_address, - &ip0->src_address); - } - - /* check for MTU or prefix options or .. */ - u8 *opt_hdr = (u8 *) (h0 + 1); - while (options_len0 > 0) - { - icmp6_neighbor_discovery_option_header_t *o0 = - (icmp6_neighbor_discovery_option_header_t *) - opt_hdr; - int opt_len = o0->n_data_u64s << 3; - icmp6_neighbor_discovery_option_type_t option_type = - o0->type; - - if (options_len0 < 2) - { - ip6_neighbor_syslog (vm, LOG_ERR, - "malformed RA packet on %U from %U", - format_vnet_sw_if_index_name, - vnm, sw_if_index0, - format_ip6_address, - &ip0->src_address); - break; - } - - if (opt_len == 0) - { - ip6_neighbor_syslog (vm, LOG_ERR, - " zero length option in RA on %U from %U", - format_vnet_sw_if_index_name, - vnm, sw_if_index0, - format_ip6_address, - &ip0->src_address); - break; - } - else if (opt_len > options_len0) - { - ip6_neighbor_syslog (vm, LOG_ERR, - "option length in RA packet greater than total length on %U from %U", - format_vnet_sw_if_index_name, - vnm, sw_if_index0, - format_ip6_address, - &ip0->src_address); - break; - } - - options_len0 -= opt_len; - opt_hdr += opt_len; - - switch (option_type) - { - case ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address: - { - icmp6_neighbor_discovery_ethernet_link_layer_address_option_t - * h = - (icmp6_neighbor_discovery_ethernet_link_layer_address_option_t - *) (o0); - - if (opt_len < sizeof (*h)) - break; - - memcpy (r.slla, h->ethernet_address, 6); - } - break; - - case ICMP6_NEIGHBOR_DISCOVERY_OPTION_mtu: - { - icmp6_neighbor_discovery_mtu_option_t *h = - (icmp6_neighbor_discovery_mtu_option_t - *) (o0); - - if (opt_len < sizeof (*h)) - break; - - r.mtu = clib_net_to_host_u32 (h->mtu); - - if ((h->mtu && radv_info->adv_link_mtu) && - (h->mtu != - clib_host_to_net_u32 - (radv_info->adv_link_mtu))) - { - ip6_neighbor_syslog (vm, LOG_WARNING, - "our AdvLinkMTU on %U doesn't agree with %U", - format_vnet_sw_if_index_name, - vnm, sw_if_index0, - format_ip6_address, - &ip0->src_address); - } - } - break; - - case ICMP6_NEIGHBOR_DISCOVERY_OPTION_prefix_information: - { - icmp6_neighbor_discovery_prefix_information_option_t - * h = - (icmp6_neighbor_discovery_prefix_information_option_t - *) (o0); - - /* validate advertised prefix options */ - ip6_radv_prefix_t *pr_info; - u32 preferred, valid; - - if (opt_len < sizeof (*h)) - break; - - vec_validate (r.prefixes, - vec_len (r.prefixes)); - ra_report_prefix_info_t *prefix = - vec_elt_at_index (r.prefixes, - vec_len (r.prefixes) - 1); - - preferred = - clib_net_to_host_u32 (h->preferred_time); - valid = clib_net_to_host_u32 (h->valid_time); - - prefix->preferred_time = preferred; - prefix->valid_time = valid; - prefix->flags = h->flags & 0xc0; - prefix->prefix.fp_len = h->dst_address_length; - prefix->prefix.fp_addr.ip6 = h->dst_address; - prefix->prefix.fp_proto = FIB_PROTOCOL_IP6; - - /* look for matching prefix - if we our advertising it, it better be consistant */ - /* *INDENT-OFF* */ - pool_foreach (pr_info, radv_info->adv_prefixes_pool, - ({ - - ip6_address_t mask; - ip6_address_mask_from_width(&mask, pr_info->prefix_len); - - if(pr_info->enabled && - (pr_info->prefix_len == h->dst_address_length) && - ip6_address_is_equal_masked (&pr_info->prefix, &h->dst_address, &mask)) - { - /* found it */ - if(!pr_info->decrement_lifetime_flag && - valid != pr_info->adv_valid_lifetime_in_secs) - { - ip6_neighbor_syslog(vm, LOG_WARNING, - "our ADV validlifetime on %U for %U does not agree with %U", - format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix, - format_ip6_address, &h->dst_address); - } - if(!pr_info->decrement_lifetime_flag && - preferred != pr_info->adv_pref_lifetime_in_secs) - { - ip6_neighbor_syslog(vm, LOG_WARNING, - "our ADV preferredlifetime on %U for %U does not agree with %U", - format_vnet_sw_if_index_name, vnm, sw_if_index0,format_ip6_address, &pr_info->prefix, - format_ip6_address, &h->dst_address); - } - } - break; - })); - /* *INDENT-ON* */ - break; - } - default: - /* skip this one */ - break; - } - } - ra_publish (&r); - } - } - } - - p0->error = error_node->errors[error0]; - - if (error0 != ICMP6_ERROR_NONE) - vlib_error_count (vm, error_node->node_index, error0, 1); - - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, - bi0, next0); - } - - vlib_put_next_frame (vm, node, next_index, n_left_to_next); - } - - /* Account for router advertisements received. */ - vlib_error_count (vm, error_node->node_index, - ICMP6_ERROR_ROUTER_ADVERTISEMENTS_RX, - n_advertisements_rcvd); - - return frame->n_vectors; -} - -static inline f64 -random_f64_from_to (f64 from, f64 to) -{ - static u32 seed = 0; - static u8 seed_set = 0; - if (!seed_set) - { - seed = random_default_seed (); - seed_set = 1; - } - return random_f64 (&seed) * (to - from) + from; -} - -static inline u8 -get_mac_address (u32 sw_if_index, u8 * address) -{ - vnet_main_t *vnm = vnet_get_main (); - vnet_hw_interface_t *hw_if = vnet_get_sup_hw_interface (vnm, sw_if_index); - if (!hw_if->hw_address) - return 1; - clib_memcpy (address, hw_if->hw_address, 6); - return 0; -} - -static inline vlib_buffer_t * -create_buffer_for_rs (vlib_main_t * vm, ip6_radv_t * radv_info) -{ - u32 bi0; - vlib_buffer_t *p0; - icmp6_router_solicitation_header_t *rh; - u16 payload_length; - int bogus_length; - u32 sw_if_index; - - sw_if_index = radv_info->sw_if_index; - - if (vlib_buffer_alloc (vm, &bi0, 1) != 1) - { - clib_warning ("buffer allocation failure"); - return 0; - } - - p0 = vlib_get_buffer (vm, bi0); - VLIB_BUFFER_TRACE_TRAJECTORY_INIT (p0); - p0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; - - vnet_buffer (p0)->sw_if_index[VLIB_RX] = sw_if_index; - vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index; - - vnet_buffer (p0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index; - - rh = vlib_buffer_get_current (p0); - p0->current_length = sizeof (*rh); - - rh->neighbor.icmp.type = ICMP6_router_solicitation; - rh->neighbor.icmp.code = 0; - rh->neighbor.icmp.checksum = 0; - rh->neighbor.reserved_must_be_zero = 0; - - rh->link_layer_option.header.type = - ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address; - if (0 != get_mac_address (sw_if_index, - rh->link_layer_option.ethernet_address)) - { - clib_warning ("interface with sw_if_index %u has no mac address", - sw_if_index); - vlib_buffer_free (vm, &bi0, 1); - return 0; - } - rh->link_layer_option.header.n_data_u64s = 1; - - payload_length = sizeof (rh->neighbor) + sizeof (u64); - - rh->ip.ip_version_traffic_class_and_flow_label = - clib_host_to_net_u32 (0x6 << 28); - rh->ip.payload_length = clib_host_to_net_u16 (payload_length); - rh->ip.protocol = IP_PROTOCOL_ICMP6; - rh->ip.hop_limit = 255; - rh->ip.src_address = radv_info->link_local_address; - /* set address ff02::2 */ - rh->ip.dst_address.as_u64[0] = clib_host_to_net_u64 (0xff02ULL << 48); - rh->ip.dst_address.as_u64[1] = clib_host_to_net_u64 (2); - - rh->neighbor.icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, p0, - &rh->ip, - &bogus_length); - - return p0; -} - -static inline void -stop_sending_rs (vlib_main_t * vm, ip6_radv_t * ra) -{ - u32 bi0; - - ra->keep_sending_rs = 0; - if (ra->buffer) - { - bi0 = vlib_get_buffer_index (vm, ra->buffer); - vlib_buffer_free (vm, &bi0, 1); - ra->buffer = 0; - } -} - -static inline bool -check_send_rs (vlib_main_t * vm, ip6_radv_t * radv_info, f64 current_time, - f64 * due_time) -{ - vlib_buffer_t *p0; - vlib_frame_t *f; - u32 *to_next; - u32 next_index; - vlib_buffer_t *c0; - u32 ci0; - - icmp6_send_router_solicitation_params_t *params; - - if (!radv_info->keep_sending_rs) - return false; - - params = &radv_info->params; - - if (radv_info->due_time > current_time) - { - *due_time = radv_info->due_time; - return true; - } - - p0 = radv_info->buffer; - - next_index = ip6_rewrite_mcast_node.index; - - c0 = vlib_buffer_copy (vm, p0); - ci0 = vlib_get_buffer_index (vm, c0); - - f = vlib_get_frame_to_node (vm, next_index); - to_next = vlib_frame_vector_args (f); - to_next[0] = ci0; - f->n_vectors = 1; - vlib_put_frame_to_node (vm, next_index, f); - - if (params->mrc != 0 && --radv_info->n_left == 0) - stop_sending_rs (vm, radv_info); - else - { - radv_info->sleep_interval = - (2 + random_f64_from_to (-0.1, 0.1)) * radv_info->sleep_interval; - if (radv_info->sleep_interval > params->mrt) - radv_info->sleep_interval = - (1 + random_f64_from_to (-0.1, 0.1)) * params->mrt; - - radv_info->due_time = current_time + radv_info->sleep_interval; - - if (params->mrd != 0 - && current_time > radv_info->start_time + params->mrd) - stop_sending_rs (vm, radv_info); - else - *due_time = radv_info->due_time; - } - - return radv_info->keep_sending_rs; -} - -static uword -send_rs_process (vlib_main_t * vm, vlib_node_runtime_t * rt, - vlib_frame_t * f0) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_radv_t *radv_info; - uword *event_data = 0; - f64 sleep_time = 1e9; - f64 current_time; - f64 due_time; - f64 dt = 0; - - while (true) - { - vlib_process_wait_for_event_or_clock (vm, sleep_time); - vlib_process_get_events (vm, &event_data); - vec_reset_length (event_data); - - current_time = vlib_time_now (vm); - do - { - due_time = current_time + 1e9; - /* *INDENT-OFF* */ - pool_foreach (radv_info, nm->if_radv_pool, - ({ - if (check_send_rs (vm, radv_info, current_time, &dt) - && (dt < due_time)) - due_time = dt; - })); - /* *INDENT-ON* */ - current_time = vlib_time_now (vm); - } - while (due_time < current_time); - - sleep_time = due_time - current_time; - } - - return 0; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (send_rs_process_node) = { - .function = send_rs_process, - .type = VLIB_NODE_TYPE_PROCESS, - .name = "send-rs-process", -}; -/* *INDENT-ON* */ - -void -icmp6_send_router_solicitation (vlib_main_t * vm, u32 sw_if_index, u8 stop, - icmp6_send_router_solicitation_params_t * - params) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - u32 rai; - ip6_radv_t *ra = 0; - - ASSERT (~0 != sw_if_index); - - rai = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - ra = pool_elt_at_index (nm->if_radv_pool, rai); - - stop_sending_rs (vm, ra); - - if (!stop) - { - ra->keep_sending_rs = 1; - ra->params = *params; - ra->n_left = params->mrc; - ra->start_time = vlib_time_now (vm); - ra->sleep_interval = (1 + random_f64_from_to (-0.1, 0.1)) * params->irt; - ra->due_time = 0; /* send first packet ASAP */ - ra->buffer = create_buffer_for_rs (vm, ra); - if (!ra->buffer) - ra->keep_sending_rs = 0; - else - vlib_process_signal_event (vm, send_rs_process_node.index, 1, 0); - } -} - -/** - * @brief Add a multicast Address to the advertised MLD set - */ -static void -ip6_neighbor_add_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr) -{ - ip6_mldp_group_t *mcast_group_info; - uword *p; - - /* lookup mldp info for this interface */ - p = mhash_get (&radv_info->address_to_mldp_index, addr); - mcast_group_info = - p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0; - - /* add address */ - if (!mcast_group_info) - { - /* add */ - u32 mi; - pool_get (radv_info->mldp_group_pool, mcast_group_info); - memset (mcast_group_info, 0, sizeof (*mcast_group_info)); - - mi = mcast_group_info - radv_info->mldp_group_pool; - mhash_set (&radv_info->address_to_mldp_index, addr, mi, /* old_value */ - 0); - - mcast_group_info->type = 4; - mcast_group_info->mcast_source_address_pool = 0; - mcast_group_info->num_sources = 0; - clib_memcpy (&mcast_group_info->mcast_address, addr, - sizeof (ip6_address_t)); - } -} - -/** - * @brief Delete a multicast Address from the advertised MLD set - */ -static void -ip6_neighbor_del_mld_prefix (ip6_radv_t * radv_info, ip6_address_t * addr) -{ - ip6_mldp_group_t *mcast_group_info; - uword *p; - - p = mhash_get (&radv_info->address_to_mldp_index, &addr); - mcast_group_info = - p ? pool_elt_at_index (radv_info->mldp_group_pool, p[0]) : 0; - - if (mcast_group_info) - { - mhash_unset (&radv_info->address_to_mldp_index, &addr, - /* old_value */ 0); - pool_put (radv_info->mldp_group_pool, mcast_group_info); - } -} - -/** - * @brief Add a multicast Address to the advertised MLD set - */ -static void -ip6_neighbor_add_mld_grp (ip6_radv_t * a, - ip6_multicast_address_scope_t scope, - ip6_multicast_link_local_group_id_t group) -{ - ip6_address_t addr; - - ip6_set_reserved_multicast_address (&addr, scope, group); - - ip6_neighbor_add_mld_prefix (a, &addr); -} - -/** - * @brief create and initialize router advertisement parameters with default - * values for this intfc - */ -u32 -ip6_neighbor_sw_interface_add_del (vnet_main_t * vnm, - u32 sw_if_index, u32 is_add) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_radv_t *a = 0; - u32 ri = ~0; - vnet_sw_interface_t *sw_if0; - ethernet_interface_t *eth_if0 = 0; - - /* lookup radv container - ethernet interfaces only */ - sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index); - if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE) - eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index); - - if (!eth_if0) - return ri; - - vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, - ~0); - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - - if (ri != ~0) - { - a = pool_elt_at_index (nm->if_radv_pool, ri); - - if (!is_add) - { - ip6_radv_prefix_t *p; - ip6_mldp_group_t *m; - - /* release the lock on the interface's mcast adj */ - adj_unlock (a->mcast_adj_index); - - /* clean up prefix and MDP pools */ - /* *INDENT-OFF* */ - pool_flush(p, a->adv_prefixes_pool, - ({ - mhash_unset (&a->address_to_prefix_index, &p->prefix, 0); - })); - pool_flush (m, a->mldp_group_pool, - ({ - mhash_unset (&a->address_to_mldp_index, &m->mcast_address, 0); - })); - /* *INDENT-ON* */ - - pool_free (a->mldp_group_pool); - pool_free (a->adv_prefixes_pool); - - mhash_free (&a->address_to_prefix_index); - mhash_free (&a->address_to_mldp_index); - - if (a->keep_sending_rs) - a->keep_sending_rs = 0; - - pool_put (nm->if_radv_pool, a); - nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ~0; - ri = ~0; - } - } - else - { - if (is_add) - { - pool_get (nm->if_radv_pool, a); - memset (a, 0, sizeof (*a)); - - ri = a - nm->if_radv_pool; - nm->if_radv_pool_index_by_sw_if_index[sw_if_index] = ri; - - /* initialize default values (most of which are zero) */ - clib_memset (a, 0, sizeof (a[0])); - - a->sw_if_index = sw_if_index; - a->max_radv_interval = DEF_MAX_RADV_INTERVAL; - a->min_radv_interval = DEF_MIN_RADV_INTERVAL; - a->curr_hop_limit = DEF_CURR_HOP_LIMIT; - a->adv_router_lifetime_in_sec = DEF_DEF_RTR_LIFETIME; - - /* send ll address source address option */ - a->adv_link_layer_address = 1; - - a->min_delay_between_radv = MIN_DELAY_BETWEEN_RAS; - a->max_delay_between_radv = MAX_DELAY_BETWEEN_RAS; - a->max_rtr_default_lifetime = MAX_DEF_RTR_LIFETIME; - a->seed = (u32) clib_cpu_time_now (); - (void) random_u32 (&a->seed); - a->randomizer = clib_cpu_time_now (); - (void) random_u64 (&a->randomizer); - - a->initial_adverts_count = MAX_INITIAL_RTR_ADVERTISEMENTS; - a->initial_adverts_sent = a->initial_adverts_count - 1; - a->initial_adverts_interval = MAX_INITIAL_RTR_ADVERT_INTERVAL; - - /* deafult is to send */ - a->send_radv = 1; - - /* fill in radv_info for this interface that will be needed later */ - a->adv_link_mtu = - vnet_sw_interface_get_mtu (vnm, sw_if_index, VNET_MTU_IP6); - - clib_memcpy (a->link_layer_address, eth_if0->address, 6); - - /* fill in default link-local address (this may be overridden) */ - ip6_link_local_address_from_ethernet_mac_address - (&a->link_local_address, eth_if0->address); - - mhash_init (&a->address_to_prefix_index, sizeof (uword), - sizeof (ip6_address_t)); - mhash_init (&a->address_to_mldp_index, sizeof (uword), - sizeof (ip6_address_t)); - - a->mcast_adj_index = adj_mcast_add_or_lock (FIB_PROTOCOL_IP6, - VNET_LINK_IP6, - sw_if_index); - - a->keep_sending_rs = 0; - - /* add multicast groups we will always be reporting */ - ip6_neighbor_add_mld_grp (a, - IP6_MULTICAST_SCOPE_link_local, - IP6_MULTICAST_GROUP_ID_all_hosts); - ip6_neighbor_add_mld_grp (a, - IP6_MULTICAST_SCOPE_link_local, - IP6_MULTICAST_GROUP_ID_all_routers); - ip6_neighbor_add_mld_grp (a, - IP6_MULTICAST_SCOPE_link_local, - IP6_MULTICAST_GROUP_ID_mldv2_routers); - } - } - return ri; -} - -/* send an mldpv2 report */ -static void -ip6_neighbor_send_mldpv2_report (u32 sw_if_index) -{ - vnet_main_t *vnm = vnet_get_main (); - vlib_main_t *vm = vnm->vlib_main; - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - vnet_sw_interface_t *sw_if0; - ethernet_interface_t *eth_if0; - u32 ri; - int bogus_length; - - ip6_radv_t *radv_info; - u16 payload_length; - vlib_buffer_t *b0; - ip6_header_t *ip0; - u32 *to_next; - vlib_frame_t *f; - u32 bo0; - u32 n_to_alloc = 1; - u32 n_allocated; - - icmp6_multicast_listener_report_header_t *rh0; - icmp6_multicast_listener_report_packet_t *rp0; - - sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index); - ASSERT (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE); - eth_if0 = ethernet_get_interface (ðernet_main, sw_if0->hw_if_index); - - if (!eth_if0 || !vnet_sw_interface_is_admin_up (vnm, sw_if_index)) - return; - - /* look up the radv_t information for this interface */ - vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, - ~0); - - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - - if (ri == ~0) - return; - - /* send report now - build a mldpv2 report packet */ - n_allocated = vlib_buffer_alloc (vm, &bo0, n_to_alloc); - if (PREDICT_FALSE (n_allocated == 0)) - { - alloc_fail: - clib_warning ("buffer allocation failure"); - return; - } - - b0 = vlib_get_buffer (vm, bo0); - - /* adjust the sizeof the buffer to just include the ipv6 header */ - b0->current_length = sizeof (icmp6_multicast_listener_report_packet_t); - - payload_length = sizeof (icmp6_multicast_listener_report_header_t); - - b0->error = ICMP6_ERROR_NONE; - - rp0 = vlib_buffer_get_current (b0); - ip0 = (ip6_header_t *) & rp0->ip; - rh0 = (icmp6_multicast_listener_report_header_t *) & rp0->report_hdr; - - clib_memset (rp0, 0x0, sizeof (icmp6_multicast_listener_report_packet_t)); - - ip0->ip_version_traffic_class_and_flow_label = - clib_host_to_net_u32 (0x6 << 28); - - ip0->protocol = IP_PROTOCOL_IP6_HOP_BY_HOP_OPTIONS; - /* for DEBUG - vnet driver won't seem to emit router alerts */ - /* ip0->protocol = IP_PROTOCOL_ICMP6; */ - ip0->hop_limit = 1; - - rh0->icmp.type = ICMP6_multicast_listener_report_v2; - - /* source address MUST be the link-local address */ - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - ip0->src_address = radv_info->link_local_address; - - /* destination is all mldpv2 routers */ - ip6_set_reserved_multicast_address (&ip0->dst_address, - IP6_MULTICAST_SCOPE_link_local, - IP6_MULTICAST_GROUP_ID_mldv2_routers); - - /* add reports here */ - ip6_mldp_group_t *m; - int num_addr_records = 0; - icmp6_multicast_address_record_t rr; - - /* fill in the hop-by-hop extension header (router alert) info */ - rh0->ext_hdr.next_hdr = IP_PROTOCOL_ICMP6; - rh0->ext_hdr.n_data_u64s = 0; - - rh0->alert.type = IP6_MLDP_ALERT_TYPE; - rh0->alert.len = 2; - rh0->alert.value = 0; - - rh0->pad.type = 1; - rh0->pad.len = 0; - - rh0->icmp.checksum = 0; - - /* *INDENT-OFF* */ - pool_foreach (m, radv_info->mldp_group_pool, - ({ - rr.type = m->type; - rr.aux_data_len_u32s = 0; - rr.num_sources = clib_host_to_net_u16 (m->num_sources); - clib_memcpy(&rr.mcast_addr, &m->mcast_address, sizeof(ip6_address_t)); - - num_addr_records++; - - if(vlib_buffer_add_data (vm, &bo0, (void *)&rr, - sizeof(icmp6_multicast_address_record_t))) - { - vlib_buffer_free (vm, &bo0, 1); - goto alloc_fail; - } - - payload_length += sizeof( icmp6_multicast_address_record_t); - })); - /* *INDENT-ON* */ - - rh0->rsvd = 0; - rh0->num_addr_records = clib_host_to_net_u16 (num_addr_records); - - /* update lengths */ - ip0->payload_length = clib_host_to_net_u16 (payload_length); - - rh0->icmp.checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip0, - &bogus_length); - ASSERT (bogus_length == 0); - - /* - * OK to override w/ no regard for actual FIB, because - * ip6-rewrite only looks at the adjacency. - */ - vnet_buffer (b0)->sw_if_index[VLIB_RX] = - vnet_main.local_interface_sw_if_index; - - vnet_buffer (b0)->ip.adj_index[VLIB_TX] = radv_info->mcast_adj_index; - b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; - - vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "ip6-rewrite-mcast"); - - f = vlib_get_frame_to_node (vm, node->index); - to_next = vlib_frame_vector_args (f); - to_next[0] = bo0; - f->n_vectors = 1; - - vlib_put_frame_to_node (vm, node->index, f); - return; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ip6_icmp_router_solicitation_node,static) = -{ - .function = icmp6_router_solicitation, - .name = "icmp6-router-solicitation", - - .vector_size = sizeof (u32), - - .format_trace = format_icmp6_input_trace, - - .n_next_nodes = ICMP6_ROUTER_SOLICITATION_N_NEXT, - .next_nodes = { - [ICMP6_ROUTER_SOLICITATION_NEXT_DROP] = "ip6-drop", - [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_RW] = "ip6-rewrite-mcast", - [ICMP6_ROUTER_SOLICITATION_NEXT_REPLY_TX] = "interface-output", - }, -}; -/* *INDENT-ON* */ - -/* send a RA or update the timer info etc.. */ -static uword -ip6_neighbor_process_timer_event (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - vnet_main_t *vnm = vnet_get_main (); - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_radv_t *radv_info; - vlib_frame_t *f = 0; - u32 n_this_frame = 0; - u32 n_left_to_next = 0; - u32 *to_next = 0; - u32 bo0; - icmp6_router_solicitation_header_t *h0; - vlib_buffer_t *b0; - f64 now = vlib_time_now (vm); - - /* Interface ip6 radv info list */ - /* *INDENT-OFF* */ - pool_foreach (radv_info, nm->if_radv_pool, - ({ - if( !vnet_sw_interface_is_admin_up (vnm, radv_info->sw_if_index)) - { - radv_info->initial_adverts_sent = radv_info->initial_adverts_count-1; - radv_info->next_multicast_time = now; - radv_info->last_multicast_time = now; - radv_info->last_radv_time = 0; - radv_info->all_routers_mcast = 0; - continue; - } - - /* Make sure that we've joined the all-routers multicast group */ - if(!radv_info->all_routers_mcast) - { - /* send MDLP_REPORT_EVENT message */ - ip6_neighbor_send_mldpv2_report(radv_info->sw_if_index); - radv_info->all_routers_mcast = 1; - } - - /* is it time to send a multicast RA on this interface? */ - if(radv_info->send_radv && (now >= radv_info->next_multicast_time)) - { - u32 n_to_alloc = 1; - u32 n_allocated; - - f64 rfn = (radv_info->max_radv_interval - radv_info->min_radv_interval) * - random_f64 (&radv_info->seed) + radv_info->min_radv_interval; - - /* multicast send - compute next multicast send time */ - if( radv_info->initial_adverts_sent > 0) - { - radv_info->initial_adverts_sent--; - if(rfn > radv_info-> initial_adverts_interval) - rfn = radv_info-> initial_adverts_interval; - - /* check to see if we are ceasing to send */ - if( radv_info->initial_adverts_sent == 0) - if(radv_info->cease_radv) - radv_info->send_radv = 0; - } - - radv_info->next_multicast_time = rfn + now; - radv_info->last_multicast_time = now; - - /* send advert now - build a "solicted" router advert with unspecified source address */ - n_allocated = vlib_buffer_alloc (vm, &bo0, n_to_alloc); - - if (PREDICT_FALSE(n_allocated == 0)) - { - clib_warning ("buffer allocation failure"); - continue; - } - b0 = vlib_get_buffer (vm, bo0); - b0->current_length = sizeof( icmp6_router_solicitation_header_t); - b0->error = ICMP6_ERROR_NONE; - vnet_buffer (b0)->sw_if_index[VLIB_RX] = radv_info->sw_if_index; - - h0 = vlib_buffer_get_current (b0); - - clib_memset (h0, 0, sizeof (icmp6_router_solicitation_header_t)); - - h0->ip.ip_version_traffic_class_and_flow_label = clib_host_to_net_u32 (0x6 << 28); - h0->ip.payload_length = clib_host_to_net_u16 (sizeof (icmp6_router_solicitation_header_t) - - STRUCT_OFFSET_OF (icmp6_router_solicitation_header_t, neighbor)); - h0->ip.protocol = IP_PROTOCOL_ICMP6; - h0->ip.hop_limit = 255; - - /* set src/dst address as "unspecified" this marks this packet as internally generated rather than recieved */ - h0->ip.src_address.as_u64[0] = 0; - h0->ip.src_address.as_u64[1] = 0; - - h0->ip.dst_address.as_u64[0] = 0; - h0->ip.dst_address.as_u64[1] = 0; - - h0->neighbor.icmp.type = ICMP6_router_solicitation; - - if (PREDICT_FALSE(f == 0)) - { - f = vlib_get_frame_to_node (vm, ip6_icmp_router_solicitation_node.index); - to_next = vlib_frame_vector_args (f); - n_left_to_next = VLIB_FRAME_SIZE; - n_this_frame = 0; - } - - n_this_frame++; - n_left_to_next--; - to_next[0] = bo0; - to_next += 1; - - if (PREDICT_FALSE(n_left_to_next == 0)) - { - f->n_vectors = n_this_frame; - vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f); - f = 0; - } - } - })); - /* *INDENT-ON* */ - - if (f) - { - ASSERT (n_this_frame); - f->n_vectors = n_this_frame; - vlib_put_frame_to_node (vm, ip6_icmp_router_solicitation_node.index, f); - } - return 0; -} - -static uword -ip6_icmp_neighbor_discovery_event_process (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - uword event_type; - ip6_icmp_neighbor_discovery_event_data_t *event_data; - - /* init code here */ - - while (1) - { - vlib_process_wait_for_event_or_clock (vm, 1. /* seconds */ ); - - event_data = vlib_process_get_event_data (vm, &event_type); - - if (!event_data) - { - /* No events found: timer expired. */ - /* process interface list and send RAs as appropriate, update timer info */ - ip6_neighbor_process_timer_event (vm, node, frame); - } - else - { - switch (event_type) - { - - case ICMP6_ND_EVENT_INIT: - break; - - case ~0: - break; - - default: - ASSERT (0); - } - - if (event_data) - _vec_len (event_data) = 0; - } - } - return frame->n_vectors; -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ip6_icmp_router_advertisement_node,static) = -{ - .function = icmp6_router_advertisement, - .name = "icmp6-router-advertisement", - - .vector_size = sizeof (u32), - - .format_trace = format_icmp6_input_trace, - - .n_next_nodes = 1, - .next_nodes = { - [0] = "ip6-drop", - }, -}; -/* *INDENT-ON* */ - -vlib_node_registration_t ip6_icmp_neighbor_discovery_event_node = { - - .function = ip6_icmp_neighbor_discovery_event_process, - .name = "ip6-icmp-neighbor-discovery-event-process", - .type = VLIB_NODE_TYPE_PROCESS, -}; - -static uword -icmp6_neighbor_solicitation (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame, - /* is_solicitation */ - 1); -} - -static uword -icmp6_neighbor_advertisement (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame) -{ - return icmp6_neighbor_solicitation_or_advertisement (vm, node, frame, - /* is_solicitation */ - 0); -} - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ip6_icmp_neighbor_solicitation_node,static) = -{ - .function = icmp6_neighbor_solicitation, - .name = "icmp6-neighbor-solicitation", - - .vector_size = sizeof (u32), - - .format_trace = format_icmp6_input_trace, - - .n_next_nodes = ICMP6_NEIGHBOR_SOLICITATION_N_NEXT, - .next_nodes = { - [ICMP6_NEIGHBOR_SOLICITATION_NEXT_DROP] = "ip6-drop", - [ICMP6_NEIGHBOR_SOLICITATION_NEXT_REPLY] = "interface-output", - }, -}; -/* *INDENT-ON* */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ip6_icmp_neighbor_advertisement_node,static) = -{ - .function = icmp6_neighbor_advertisement, - .name = "icmp6-neighbor-advertisement", - - .vector_size = sizeof (u32), - - .format_trace = format_icmp6_input_trace, - - .n_next_nodes = 1, - .next_nodes = { - [0] = "ip6-drop", - }, -}; -/* *INDENT-ON* */ - -typedef enum -{ - IP6_DISCOVER_NEIGHBOR_NEXT_DROP, - IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX, - IP6_DISCOVER_NEIGHBOR_N_NEXT, -} ip6_discover_neighbor_next_t; - -typedef enum -{ - IP6_DISCOVER_NEIGHBOR_ERROR_DROP, - IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT, - IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS, -} ip6_discover_neighbor_error_t; - -static uword -ip6_discover_neighbor_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, int is_glean) -{ - vnet_main_t *vnm = vnet_get_main (); - ip6_main_t *im = &ip6_main; - ip_lookup_main_t *lm = &im->lookup_main; - u32 *from, *to_next_drop; - uword n_left_from, n_left_to_next_drop; - u64 seed; - u32 thread_index = vm->thread_index; - int bogus_length; - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - - if (node->flags & VLIB_NODE_FLAG_TRACE) - ip6_forward_next_trace (vm, node, frame, VLIB_TX); - - seed = throttle_seed (&im->nd_throttle, thread_index, vlib_time_now (vm)); - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - - while (n_left_from > 0) - { - vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP, - to_next_drop, n_left_to_next_drop); - - while (n_left_from > 0 && n_left_to_next_drop > 0) - { - u32 pi0, adj_index0, sw_if_index0, drop0, r0, next0; - vnet_hw_interface_t *hw_if0; - ip6_radv_t *radv_info; - ip_adjacency_t *adj0; - vlib_buffer_t *p0; - ip6_header_t *ip0; - - pi0 = from[0]; - - p0 = vlib_get_buffer (vm, pi0); - - adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; - - ip0 = vlib_buffer_get_current (p0); - - adj0 = adj_get (adj_index0); - - if (!is_glean) - { - ip0->dst_address.as_u64[0] = - adj0->sub_type.nbr.next_hop.ip6.as_u64[0]; - ip0->dst_address.as_u64[1] = - adj0->sub_type.nbr.next_hop.ip6.as_u64[1]; - } - - sw_if_index0 = adj0->rewrite_header.sw_if_index; - vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0; - - /* combine the address and interface for a hash */ - r0 = ip6_address_hash_to_u64 (&ip0->dst_address) ^ sw_if_index0; - - drop0 = throttle_check (&im->nd_throttle, thread_index, r0, seed); - - from += 1; - n_left_from -= 1; - to_next_drop[0] = pi0; - to_next_drop += 1; - n_left_to_next_drop -= 1; - - hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0); - - /* If the interface is link-down, drop the pkt */ - if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)) - drop0 = 1; - - if (vec_len (nm->if_radv_pool_index_by_sw_if_index) > sw_if_index0) - { - u32 ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index0]; - - if (ri != ~0) - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - else - drop0 = 1; - } - else - drop0 = 1; - - /* - * the adj has been updated to a rewrite but the node the DPO that got - * us here hasn't - yet. no big deal. we'll drop while we wait. - */ - if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index) - drop0 = 1; - - p0->error = - node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP - : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT]; - - if (drop0) - continue; - - { - u32 bi0 = 0; - icmp6_neighbor_solicitation_header_t *h0; - vlib_buffer_t *b0; - - h0 = vlib_packet_template_get_packet - (vm, &im->discover_neighbor_packet_template, &bi0); - if (!h0) - continue; - - /* copy the persistent fields from the original */ - b0 = vlib_get_buffer (vm, bi0); - clib_memcpy_fast (b0->opaque2, p0->opaque2, sizeof (p0->opaque2)); - - /* - * Build ethernet header. - * Choose source address based on destination lookup - * adjacency. - */ - if (!ip6_src_address_for_packet (lm, - sw_if_index0, - &ip0->dst_address, - &h0->ip.src_address)) - { - /* There is no address on the interface */ - p0->error = - node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]; - vlib_buffer_free (vm, &bi0, 1); - continue; - } - - /* - * Destination address is a solicited node multicast address. - * We need to fill in - * the low 24 bits with low 24 bits of target's address. - */ - h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13]; - h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14]; - h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15]; - - h0->neighbor.target_address = ip0->dst_address; - - clib_memcpy (h0->link_layer_option.ethernet_address, - hw_if0->hw_address, vec_len (hw_if0->hw_address)); - - /* $$$$ appears we need this; why is the checksum non-zero? */ - h0->neighbor.icmp.checksum = 0; - h0->neighbor.icmp.checksum = - ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip, - &bogus_length); - - ASSERT (bogus_length == 0); - - vlib_buffer_copy_trace_flag (vm, p0, bi0); - vnet_buffer (b0)->sw_if_index[VLIB_TX] - = vnet_buffer (p0)->sw_if_index[VLIB_TX]; - - vnet_buffer (b0)->ip.adj_index[VLIB_TX] = - radv_info->mcast_adj_index; - - b0->flags |= VNET_BUFFER_F_LOCALLY_ORIGINATED; - next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX; - - vlib_set_next_frame_buffer (vm, node, next0, bi0); - } - } - - vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP, - n_left_to_next_drop); - } - - return frame->n_vectors; -} - -static uword -ip6_discover_neighbor (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return (ip6_discover_neighbor_inline (vm, node, frame, 0)); -} - -static uword -ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return (ip6_discover_neighbor_inline (vm, node, frame, 1)); -} - -static char *ip6_discover_neighbor_error_strings[] = { - [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops", - [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent", - [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS] - = "no source address for ND solicitation", -}; - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ip6_glean_node) = -{ - .function = ip6_glean, - .name = "ip6-glean", - .vector_size = sizeof (u32), - .format_trace = format_ip6_forward_next_trace, - .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings), - .error_strings = ip6_discover_neighbor_error_strings, - .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT, - .next_nodes = - { - [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop", - [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast", - }, -}; -VLIB_REGISTER_NODE (ip6_discover_neighbor_node) = -{ - .function = ip6_discover_neighbor, - .name = "ip6-discover-neighbor", - .vector_size = sizeof (u32), - .format_trace = format_ip6_forward_next_trace, - .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings), - .error_strings = ip6_discover_neighbor_error_strings, - .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT, - .next_nodes = - { - [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop", - [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "ip6-rewrite-mcast", - }, -}; -/* *INDENT-ON* */ - -/* API support functions */ -int -ip6_neighbor_ra_config (vlib_main_t * vm, u32 sw_if_index, - u8 suppress, u8 managed, u8 other, - u8 ll_option, u8 send_unicast, u8 cease, - u8 use_lifetime, u32 lifetime, - u32 initial_count, u32 initial_interval, - u32 max_interval, u32 min_interval, u8 is_no) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - int error; - u32 ri; - - /* look up the radv_t information for this interface */ - vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, - ~0); - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX; - - if (!error) - { - - ip6_radv_t *radv_info; - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - - if ((max_interval != 0) && (min_interval == 0)) - min_interval = .75 * max_interval; - - max_interval = - (max_interval != - 0) ? ((is_no) ? DEF_MAX_RADV_INTERVAL : max_interval) : - radv_info->max_radv_interval; - min_interval = - (min_interval != - 0) ? ((is_no) ? DEF_MIN_RADV_INTERVAL : min_interval) : - radv_info->min_radv_interval; - lifetime = - (use_lifetime != - 0) ? ((is_no) ? DEF_DEF_RTR_LIFETIME : lifetime) : - radv_info->adv_router_lifetime_in_sec; - - if (lifetime) - { - if (lifetime > MAX_DEF_RTR_LIFETIME) - lifetime = MAX_DEF_RTR_LIFETIME; - - if (lifetime <= max_interval) - return VNET_API_ERROR_INVALID_VALUE; - } - - if (min_interval != 0) - { - if ((min_interval > .75 * max_interval) || (min_interval < 3)) - return VNET_API_ERROR_INVALID_VALUE; - } - - if ((initial_count > MAX_INITIAL_RTR_ADVERTISEMENTS) || - (initial_interval > MAX_INITIAL_RTR_ADVERT_INTERVAL)) - return VNET_API_ERROR_INVALID_VALUE; - - /* - if "flag" is set and is_no is true then restore default value else set value corresponding to "flag" - if "flag" is clear don't change corresponding value - */ - radv_info->send_radv = - (suppress != 0) ? ((is_no != 0) ? 1 : 0) : radv_info->send_radv; - radv_info->adv_managed_flag = - (managed != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_managed_flag; - radv_info->adv_other_flag = - (other != 0) ? ((is_no) ? 0 : 1) : radv_info->adv_other_flag; - radv_info->adv_link_layer_address = - (ll_option != - 0) ? ((is_no) ? 1 : 0) : radv_info->adv_link_layer_address; - radv_info->send_unicast = - (send_unicast != 0) ? ((is_no) ? 0 : 1) : radv_info->send_unicast; - radv_info->cease_radv = - (cease != 0) ? ((is_no) ? 0 : 1) : radv_info->cease_radv; - - radv_info->min_radv_interval = min_interval; - radv_info->max_radv_interval = max_interval; - radv_info->adv_router_lifetime_in_sec = lifetime; - - radv_info->initial_adverts_count = - (initial_count != - 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERTISEMENTS : initial_count) : - radv_info->initial_adverts_count; - radv_info->initial_adverts_interval = - (initial_interval != - 0) ? ((is_no) ? MAX_INITIAL_RTR_ADVERT_INTERVAL : initial_interval) : - radv_info->initial_adverts_interval; - - /* restart */ - if ((cease != 0) && (is_no)) - radv_info->send_radv = 1; - - radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1; - radv_info->next_multicast_time = vlib_time_now (vm); - radv_info->last_multicast_time = vlib_time_now (vm); - radv_info->last_radv_time = 0; - } - return (error); -} - -int -ip6_neighbor_ra_prefix (vlib_main_t * vm, u32 sw_if_index, - ip6_address_t * prefix_addr, u8 prefix_len, - u8 use_default, u32 val_lifetime, u32 pref_lifetime, - u8 no_advertise, u8 off_link, u8 no_autoconfig, - u8 no_onlink, u8 is_no) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - int error; - - u32 ri; - - /* look up the radv_t information for this interface */ - vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, - ~0); - - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - - error = (ri != ~0) ? 0 : VNET_API_ERROR_INVALID_SW_IF_INDEX; - - if (!error) - { - f64 now = vlib_time_now (vm); - ip6_radv_t *radv_info; - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - - /* prefix info add, delete or update */ - ip6_radv_prefix_t *prefix; - - /* lookup prefix info for this address on this interface */ - uword *p = mhash_get (&radv_info->address_to_prefix_index, prefix_addr); - - prefix = p ? pool_elt_at_index (radv_info->adv_prefixes_pool, p[0]) : 0; - - if (is_no) - { - /* delete */ - if (!prefix) - return VNET_API_ERROR_INVALID_VALUE; /* invalid prefix */ - - if (prefix->prefix_len != prefix_len) - return VNET_API_ERROR_INVALID_VALUE_2; - - /* FIXME - Should the DP do this or the CP ? */ - /* do specific delete processing here before returning */ - /* try to remove from routing table */ - - mhash_unset (&radv_info->address_to_prefix_index, prefix_addr, - /* old_value */ 0); - pool_put (radv_info->adv_prefixes_pool, prefix); - - radv_info->initial_adverts_sent = - radv_info->initial_adverts_count - 1; - radv_info->next_multicast_time = vlib_time_now (vm); - radv_info->last_multicast_time = vlib_time_now (vm); - radv_info->last_radv_time = 0; - return (error); - } - - /* adding or changing */ - if (!prefix) - { - /* add */ - u32 pi; - pool_get (radv_info->adv_prefixes_pool, prefix); - memset (prefix, 0, sizeof (*prefix)); - pi = prefix - radv_info->adv_prefixes_pool; - mhash_set (&radv_info->address_to_prefix_index, prefix_addr, pi, - /* old_value */ 0); - - clib_memset (prefix, 0x0, sizeof (ip6_radv_prefix_t)); - - prefix->prefix_len = prefix_len; - clib_memcpy (&prefix->prefix, prefix_addr, sizeof (ip6_address_t)); - - /* initialize default values */ - prefix->adv_on_link_flag = 1; /* L bit set */ - prefix->adv_autonomous_flag = 1; /* A bit set */ - prefix->adv_valid_lifetime_in_secs = DEF_ADV_VALID_LIFETIME; - prefix->adv_pref_lifetime_in_secs = DEF_ADV_PREF_LIFETIME; - prefix->enabled = 1; - prefix->decrement_lifetime_flag = 1; - prefix->deprecated_prefix_flag = 1; - - if (off_link == 0) - { - /* FIXME - Should the DP do this or the CP ? */ - /* insert prefix into routing table as a connected prefix */ - } - - if (use_default) - goto restart; - } - else - { - - if (prefix->prefix_len != prefix_len) - return VNET_API_ERROR_INVALID_VALUE_2; - - if (off_link != 0) - { - /* FIXME - Should the DP do this or the CP ? */ - /* remove from routing table if already there */ - } - } - - if ((val_lifetime == ~0) || (pref_lifetime == ~0)) - { - prefix->adv_valid_lifetime_in_secs = ~0; - prefix->adv_pref_lifetime_in_secs = ~0; - prefix->decrement_lifetime_flag = 0; - } - else - { - prefix->adv_valid_lifetime_in_secs = val_lifetime;; - prefix->adv_pref_lifetime_in_secs = pref_lifetime; - } - - /* copy remaining */ - prefix->enabled = !(no_advertise != 0); - prefix->adv_on_link_flag = !((off_link != 0) || (no_onlink != 0)); - prefix->adv_autonomous_flag = !(no_autoconfig != 0); - - restart: - /* restart */ - /* fill in the expiration times */ - prefix->valid_lifetime_expires = - now + prefix->adv_valid_lifetime_in_secs; - prefix->pref_lifetime_expires = now + prefix->adv_pref_lifetime_in_secs; - - radv_info->initial_adverts_sent = radv_info->initial_adverts_count - 1; - radv_info->next_multicast_time = vlib_time_now (vm); - radv_info->last_multicast_time = vlib_time_now (vm); - radv_info->last_radv_time = 0; - } - return (error); -} - -clib_error_t * -ip6_neighbor_cmd (vlib_main_t * vm, unformat_input_t * main_input, - vlib_cli_command_t * cmd) -{ - vnet_main_t *vnm = vnet_get_main (); - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - clib_error_t *error = 0; - u8 is_no = 0; - u8 suppress = 0, managed = 0, other = 0; - u8 suppress_ll_option = 0, send_unicast = 0, cease = 0; - u8 use_lifetime = 0; - u32 sw_if_index, ra_lifetime = 0, ra_initial_count = - 0, ra_initial_interval = 0; - u32 ra_max_interval = 0, ra_min_interval = 0; - - unformat_input_t _line_input, *line_input = &_line_input; - vnet_sw_interface_t *sw_if0; - - int add_radv_info = 1; - __attribute__ ((unused)) ip6_radv_t *radv_info = 0; - ip6_address_t ip6_addr; - u32 addr_len; - - - /* Get a line of input. */ - if (!unformat_user (main_input, unformat_line_input, line_input)) - return 0; - - /* get basic radv info for this interface */ - if (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) - { - - if (unformat_user (line_input, - unformat_vnet_sw_interface, vnm, &sw_if_index)) - { - u32 ri; - ethernet_interface_t *eth_if0 = 0; - - sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index); - if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE) - eth_if0 = - ethernet_get_interface (ðernet_main, sw_if0->hw_if_index); - - if (!eth_if0) - { - error = - clib_error_return (0, "Interface must be of ethernet type"); - goto done; - } - - /* look up the radv_t information for this interface */ - vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, - sw_if_index, ~0); - - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - - if (ri != ~0) - { - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - } - else - { - error = clib_error_return (0, "unknown interface %U'", - format_unformat_error, line_input); - goto done; - } - } - else - { - error = clib_error_return (0, "invalid interface name %U'", - format_unformat_error, line_input); - goto done; - } - } - - /* get the rest of the command */ - while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (line_input, "no")) - is_no = 1; - else if (unformat (line_input, "prefix %U/%d", - unformat_ip6_address, &ip6_addr, &addr_len)) - { - add_radv_info = 0; - break; - } - else if (unformat (line_input, "ra-managed-config-flag")) - { - managed = 1; - break; - } - else if (unformat (line_input, "ra-other-config-flag")) - { - other = 1; - break; - } - else if (unformat (line_input, "ra-suppress") || - unformat (line_input, "ra-surpress")) - { - suppress = 1; - break; - } - else if (unformat (line_input, "ra-suppress-link-layer") || - unformat (line_input, "ra-surpress-link-layer")) - { - suppress_ll_option = 1; - break; - } - else if (unformat (line_input, "ra-send-unicast")) - { - send_unicast = 1; - break; - } - else if (unformat (line_input, "ra-lifetime")) - { - if (!unformat (line_input, "%d", &ra_lifetime)) - { - error = unformat_parse_error (line_input); - goto done; - } - use_lifetime = 1; - break; - } - else if (unformat (line_input, "ra-initial")) - { - if (!unformat - (line_input, "%d %d", &ra_initial_count, &ra_initial_interval)) - { - error = unformat_parse_error (line_input); - goto done; - } - break; - } - else if (unformat (line_input, "ra-interval")) - { - if (!unformat (line_input, "%d", &ra_max_interval)) - { - error = unformat_parse_error (line_input); - goto done; - } - - if (!unformat (line_input, "%d", &ra_min_interval)) - ra_min_interval = 0; - break; - } - else if (unformat (line_input, "ra-cease")) - { - cease = 1; - break; - } - else - { - error = unformat_parse_error (line_input); - goto done; - } - } - - if (add_radv_info) - { - ip6_neighbor_ra_config (vm, sw_if_index, - suppress, managed, other, - suppress_ll_option, send_unicast, cease, - use_lifetime, ra_lifetime, - ra_initial_count, ra_initial_interval, - ra_max_interval, ra_min_interval, is_no); - } - else - { - u32 valid_lifetime_in_secs = 0; - u32 pref_lifetime_in_secs = 0; - u8 use_prefix_default_values = 0; - u8 no_advertise = 0; - u8 off_link = 0; - u8 no_autoconfig = 0; - u8 no_onlink = 0; - - /* get the rest of the command */ - while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (line_input, "default")) - { - use_prefix_default_values = 1; - break; - } - else if (unformat (line_input, "infinite")) - { - valid_lifetime_in_secs = ~0; - pref_lifetime_in_secs = ~0; - break; - } - else if (unformat (line_input, "%d %d", &valid_lifetime_in_secs, - &pref_lifetime_in_secs)) - break; - else - break; - } - - - /* get the rest of the command */ - while (!use_prefix_default_values && - unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (line_input, "no-advertise")) - no_advertise = 1; - else if (unformat (line_input, "off-link")) - off_link = 1; - else if (unformat (line_input, "no-autoconfig")) - no_autoconfig = 1; - else if (unformat (line_input, "no-onlink")) - no_onlink = 1; - else - { - error = unformat_parse_error (line_input); - goto done; - } - } - - ip6_neighbor_ra_prefix (vm, sw_if_index, - &ip6_addr, addr_len, - use_prefix_default_values, - valid_lifetime_in_secs, - pref_lifetime_in_secs, - no_advertise, - off_link, no_autoconfig, no_onlink, is_no); - } - -done: - unformat_free (line_input); - - return error; -} - -static void -ip6_print_addrs (vlib_main_t * vm, u32 * addrs) -{ - ip_lookup_main_t *lm = &ip6_main.lookup_main; - u32 i; - - for (i = 0; i < vec_len (addrs); i++) - { - ip_interface_address_t *a = - pool_elt_at_index (lm->if_address_pool, addrs[i]); - ip6_address_t *address = ip_interface_address_get_address (lm, a); - - vlib_cli_output (vm, "\t\t%U/%d", - format_ip6_address, address, a->address_length); - } -} - -static clib_error_t * -show_ip6_interface_cmd (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - vnet_main_t *vnm = vnet_get_main (); - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - clib_error_t *error = 0; - u32 sw_if_index; - - sw_if_index = ~0; - - if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) - { - u32 ri; - - /* look up the radv_t information for this interface */ - vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, - sw_if_index, ~0); - - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - - if (ri != ~0) - { - ip_lookup_main_t *lm = &ip6_main.lookup_main; - ip6_radv_t *radv_info; - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - - vlib_cli_output (vm, "%U is admin %s\n", - format_vnet_sw_interface_name, vnm, - vnet_get_sw_interface (vnm, sw_if_index), - (vnet_sw_interface_is_admin_up (vnm, sw_if_index) ? - "up" : "down")); - - u32 ai; - u32 *link_scope = 0, *global_scope = 0; - u32 *local_scope = 0, *unknown_scope = 0; - ip_interface_address_t *a; - - vec_validate_init_empty (lm->if_address_pool_index_by_sw_if_index, - sw_if_index, ~0); - ai = lm->if_address_pool_index_by_sw_if_index[sw_if_index]; - - while (ai != (u32) ~ 0) - { - a = pool_elt_at_index (lm->if_address_pool, ai); - ip6_address_t *address = - ip_interface_address_get_address (lm, a); - - if (ip6_address_is_link_local_unicast (address)) - vec_add1 (link_scope, ai); - else if (ip6_address_is_global_unicast (address)) - vec_add1 (global_scope, ai); - else if (ip6_address_is_local_unicast (address)) - vec_add1 (local_scope, ai); - else - vec_add1 (unknown_scope, ai); - - ai = a->next_this_sw_interface; - } - - if (vec_len (link_scope)) - { - vlib_cli_output (vm, "\tLink-local address(es):\n"); - ip6_print_addrs (vm, link_scope); - vec_free (link_scope); - } - - if (vec_len (local_scope)) - { - vlib_cli_output (vm, "\tLocal unicast address(es):\n"); - ip6_print_addrs (vm, local_scope); - vec_free (local_scope); - } - - if (vec_len (global_scope)) - { - vlib_cli_output (vm, "\tGlobal unicast address(es):\n"); - ip6_print_addrs (vm, global_scope); - vec_free (global_scope); - } - - if (vec_len (unknown_scope)) - { - vlib_cli_output (vm, "\tOther-scope address(es):\n"); - ip6_print_addrs (vm, unknown_scope); - vec_free (unknown_scope); - } - - vlib_cli_output (vm, "\tLink-local address(es):\n"); - vlib_cli_output (vm, "\t\t%U\n", format_ip6_address, - &radv_info->link_local_address); - - vlib_cli_output (vm, "\tJoined group address(es):\n"); - ip6_mldp_group_t *m; - /* *INDENT-OFF* */ - pool_foreach (m, radv_info->mldp_group_pool, - ({ - vlib_cli_output (vm, "\t\t%U\n", format_ip6_address, - &m->mcast_address); - })); - /* *INDENT-ON* */ - - vlib_cli_output (vm, "\tAdvertised Prefixes:\n"); - ip6_radv_prefix_t *p; - /* *INDENT-OFF* */ - pool_foreach (p, radv_info->adv_prefixes_pool, - ({ - vlib_cli_output (vm, "\t\tprefix %U, length %d\n", - format_ip6_address, &p->prefix, p->prefix_len); - })); - /* *INDENT-ON* */ - - vlib_cli_output (vm, "\tMTU is %d\n", radv_info->adv_link_mtu); - vlib_cli_output (vm, "\tICMP error messages are unlimited\n"); - vlib_cli_output (vm, "\tICMP redirects are disabled\n"); - vlib_cli_output (vm, "\tICMP unreachables are not sent\n"); - vlib_cli_output (vm, "\tND DAD is disabled\n"); - //vlib_cli_output (vm, "\tND reachable time is %d milliseconds\n",); - vlib_cli_output (vm, "\tND advertised reachable time is %d\n", - radv_info->adv_neighbor_reachable_time_in_msec); - vlib_cli_output (vm, - "\tND advertised retransmit interval is %d (msec)\n", - radv_info-> - adv_time_in_msec_between_retransmitted_neighbor_solicitations); - - u32 ra_interval = radv_info->max_radv_interval; - u32 ra_interval_min = radv_info->min_radv_interval; - vlib_cli_output (vm, - "\tND router advertisements are sent every %d seconds (min interval is %d)\n", - ra_interval, ra_interval_min); - vlib_cli_output (vm, - "\tND router advertisements live for %d seconds\n", - radv_info->adv_router_lifetime_in_sec); - vlib_cli_output (vm, - "\tHosts %s stateless autoconfig for addresses\n", - (radv_info->adv_managed_flag) ? "use" : - " don't use"); - vlib_cli_output (vm, "\tND router advertisements sent %d\n", - radv_info->n_advertisements_sent); - vlib_cli_output (vm, "\tND router solicitations received %d\n", - radv_info->n_solicitations_rcvd); - vlib_cli_output (vm, "\tND router solicitations dropped %d\n", - radv_info->n_solicitations_dropped); - } - else - { - error = clib_error_return (0, "IPv6 not enabled on interface", - format_unformat_error, input); - - } - } - return error; -} - -/*? - * This command is used to display various IPv6 attributes on a given - * interface. - * - * @cliexpar - * Example of how to display IPv6 settings: - * @cliexstart{show ip6 interface GigabitEthernet2/0/0} - * GigabitEthernet2/0/0 is admin up - * Link-local address(es): - * fe80::ab8/64 - * Joined group address(es): - * ff02::1 - * ff02::2 - * ff02::16 - * ff02::1:ff00:ab8 - * Advertised Prefixes: - * prefix fe80::fe:28ff:fe9c:75b3, length 64 - * MTU is 1500 - * ICMP error messages are unlimited - * ICMP redirects are disabled - * ICMP unreachables are not sent - * ND DAD is disabled - * ND advertised reachable time is 0 - * ND advertised retransmit interval is 0 (msec) - * ND router advertisements are sent every 200 seconds (min interval is 150) - * ND router advertisements live for 600 seconds - * Hosts use stateless autoconfig for addresses - * ND router advertisements sent 19336 - * ND router solicitations received 0 - * ND router solicitations dropped 0 - * @cliexend - * Example of output if IPv6 is not enabled on the interface: - * @cliexstart{show ip6 interface GigabitEthernet2/0/0} - * show ip6 interface: IPv6 not enabled on interface - * @cliexend -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (show_ip6_interface_command, static) = -{ - .path = "show ip6 interface", - .function = show_ip6_interface_cmd, - .short_help = "show ip6 interface <interface>", -}; -/* *INDENT-ON* */ - -clib_error_t * -disable_ip6_interface (vlib_main_t * vm, u32 sw_if_index) -{ - clib_error_t *error = 0; - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - u32 ri; - - /* look up the radv_t information for this interface */ - vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, - ~0); - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - - /* if not created - do nothing */ - if (ri != ~0) - { - ip6_radv_t *radv_info; - - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - - /* check radv_info ref count for other ip6 addresses on this interface */ - /* This implicitly excludes the link local address */ - if (radv_info->ref_count == 0) - { - /* essentially "disables" ipv6 on this interface */ - ip6_ll_prefix_t ilp = { - .ilp_addr = radv_info->link_local_address, - .ilp_sw_if_index = sw_if_index, - }; - ip6_ll_table_entry_delete (&ilp); - ip6_sw_interface_enable_disable (sw_if_index, 0); - ip6_mfib_interface_enable_disable (sw_if_index, 0); - ip6_neighbor_sw_interface_add_del (vnet_get_main (), sw_if_index, - 0); - } - } - return error; -} - -int -ip6_interface_enabled (vlib_main_t * vm, u32 sw_if_index) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - u32 ri = ~0; - - /* look up the radv_t information for this interface */ - vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, - ~0); - - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - - return ri != ~0; -} - -clib_error_t * -enable_ip6_interface (vlib_main_t * vm, u32 sw_if_index) -{ - clib_error_t *error = 0; - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - u32 ri; - int is_add = 1; - - /* look up the radv_t information for this interface */ - vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, sw_if_index, - ~0); - - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - - /* if not created yet */ - if (ri == ~0) - { - vnet_main_t *vnm = vnet_get_main (); - vnet_sw_interface_t *sw_if0; - - sw_if0 = vnet_get_sup_sw_interface (vnm, sw_if_index); - if (sw_if0->type == VNET_SW_INTERFACE_TYPE_HARDWARE) - { - ethernet_interface_t *eth_if0; - - eth_if0 = - ethernet_get_interface (ðernet_main, sw_if0->hw_if_index); - if (eth_if0) - { - /* create radv_info. for this interface. This holds all the info needed for router adverts */ - ri = - ip6_neighbor_sw_interface_add_del (vnm, sw_if_index, is_add); - - if (ri != ~0) - { - ip6_radv_t *radv_info; - ip6_address_t link_local_address; - - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - - ip6_link_local_address_from_ethernet_mac_address - (&link_local_address, eth_if0->address); - - sw_if0 = vnet_get_sw_interface (vnm, sw_if_index); - if (sw_if0->type == VNET_SW_INTERFACE_TYPE_SUB || - sw_if0->type == VNET_SW_INTERFACE_TYPE_PIPE || - sw_if0->type == VNET_SW_INTERFACE_TYPE_P2P) - { - /* make up an interface id */ - link_local_address.as_u64[1] = - random_u64 (&radv_info->randomizer); - - link_local_address.as_u64[0] = - clib_host_to_net_u64 (0xFE80000000000000ULL); - /* clear u bit */ - link_local_address.as_u8[8] &= 0xfd; - } - { - ip6_ll_prefix_t ilp = { - .ilp_addr = link_local_address, - .ilp_sw_if_index = sw_if_index, - }; - - ip6_ll_table_entry_update (&ilp, FIB_ROUTE_PATH_LOCAL); - } - - /* essentially "enables" ipv6 on this interface */ - ip6_mfib_interface_enable_disable (sw_if_index, 1); - ip6_sw_interface_enable_disable (sw_if_index, 1); - - if (!error) - { - radv_info->link_local_address = link_local_address; - } - } - } - } - } - return error; -} - -int -ip6_get_ll_address (u32 sw_if_index, ip6_address_t * addr) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_radv_t *radv_info; - u32 ri; - - if (vec_len (nm->if_radv_pool_index_by_sw_if_index) <= sw_if_index) - return 0; - - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - - if (ri == ~0) - return 0; - - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - *addr = radv_info->link_local_address; - - return (!0); -} - -static clib_error_t * -enable_ip6_interface_cmd (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - vnet_main_t *vnm = vnet_get_main (); - clib_error_t *error = 0; - u32 sw_if_index; - - sw_if_index = ~0; - - if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) - { - enable_ip6_interface (vm, sw_if_index); - } - else - { - error = clib_error_return (0, "unknown interface\n'", - format_unformat_error, input); - - } - return error; -} - -/*? - * This command is used to enable IPv6 on a given interface. - * - * @cliexpar - * Example of how enable IPv6 on a given interface: - * @cliexcmd{enable ip6 interface GigabitEthernet2/0/0} -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (enable_ip6_interface_command, static) = -{ - .path = "enable ip6 interface", - .function = enable_ip6_interface_cmd, - .short_help = "enable ip6 interface <interface>", -}; -/* *INDENT-ON* */ - -static clib_error_t * -disable_ip6_interface_cmd (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - vnet_main_t *vnm = vnet_get_main (); - clib_error_t *error = 0; - u32 sw_if_index; - - sw_if_index = ~0; - - if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) - { - error = disable_ip6_interface (vm, sw_if_index); - } - else - { - error = clib_error_return (0, "unknown interface\n'", - format_unformat_error, input); - - } - return error; -} - -/*? - * This command is used to disable IPv6 on a given interface. - * - * @cliexpar - * Example of how disable IPv6 on a given interface: - * @cliexcmd{disable ip6 interface GigabitEthernet2/0/0} -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (disable_ip6_interface_command, static) = -{ - .path = "disable ip6 interface", - .function = disable_ip6_interface_cmd, - .short_help = "disable ip6 interface <interface>", -}; -/* *INDENT-ON* */ - -/*? - * This command is used to configure the neighbor discovery - * parameters on a given interface. Use the '<em>show ip6 interface</em>' - * command to display some of the current neighbor discovery parameters - * on a given interface. This command has three formats: - * - * - * <b>Format 1 - Router Advertisement Options:</b> (Only one can be entered in a single command) - * - * '<em><b>ip6 nd <interface> [no] [ra-managed-config-flag] | [ra-other-config-flag] | [ra-suppress] | [ra-suppress-link-layer] | [ra-send-unicast] | [ra-lifetime <lifetime>] | [ra-initial <cnt> <interval>] | [ra-interval <max-interval> [<min-interval>]] | [ra-cease]</b></em>' - * - * Where: - * - * <em>[no] ra-managed-config-flag</em> - Advertises in ICMPv6 - * router-advertisement messages to use stateful address - * auto-configuration to obtain address information (sets the M-bit). - * Default is the M-bit is not set and the '<em>no</em>' option - * returns it to this default state. - * - * <em>[no] ra-other-config-flag</em> - Indicates in ICMPv6 - * router-advertisement messages that hosts use stateful auto - * configuration to obtain nonaddress related information (sets - * the O-bit). Default is the O-bit is not set and the '<em>no</em>' - * option returns it to this default state. - * - * <em>[no] ra-suppress</em> - Disables sending ICMPv6 router-advertisement - * messages. The '<em>no</em>' option implies to enable sending ICMPv6 - * router-advertisement messages. - * - * <em>[no] ra-suppress-link-layer</em> - Indicates not to include the - * optional source link-layer address in the ICMPv6 router-advertisement - * messages. Default is to include the optional source link-layer address - * and the '<em>no</em>' option returns it to this default state. - * - * <em>[no] ra-send-unicast</em> - Use the source address of the - * router-solicitation message if availiable. The default is to use - * multicast address of all nodes, and the '<em>no</em>' option returns - * it to this default state. - * - * <em>[no] ra-lifetime <lifetime></em> - Advertises the lifetime of a - * default router in ICMPv6 router-advertisement messages. The range is - * from 0 to 9000 seconds. '<em><lifetime></em>' must be greater than - * '<em><max-interval></em>'. The default value is 600 seconds and the - * '<em>no</em>' option returns it to this default value. - * - * <em>[no] ra-initial <cnt> <interval></em> - Number of initial ICMPv6 - * router-advertisement messages sent and the interval between each - * message. Range for count is 1 - 3 and default is 3. Range for interval - * is 1 to 16 seconds, and default is 16 seconds. The '<em>no</em>' option - * returns both to their default value. - * - * <em>[no] ra-interval <max-interval> [<min-interval>]</em> - Configures the - * interval between sending ICMPv6 router-advertisement messages. The - * range for max-interval is from 4 to 200 seconds. min-interval can not - * be more than 75% of max-interval. If not set, min-interval will be - * set to 75% of max-interval. The range for min-interval is from 3 to - * 150 seconds. The '<em>no</em>' option returns both to their default - * value. - * - * <em>[no] ra-cease</em> - Cease sending ICMPv6 router-advertisement messages. - * The '<em>no</em>' options implies to start (or restart) sending - * ICMPv6 router-advertisement messages. - * - * - * <b>Format 2 - Prefix Options:</b> - * - * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> [<valid-lifetime> <pref-lifetime> | infinite] [no-advertise] [off-link] [no-autoconfig] [no-onlink]</b></em>' - * - * Where: - * - * <em>no</em> - All additional flags are ignored and the prefix is deleted. - * - * <em><valid-lifetime> <pref-lifetime></em> - '<em><valid-lifetime></em>' is the - * length of time in seconds during what the prefix is valid for the purpose of - * on-link determination. Range is 7203 to 2592000 seconds and default is 2592000 - * seconds (30 days). '<em><pref-lifetime></em>' is the prefered-lifetime and is the - * length of time in seconds during what addresses generated from the prefix remain - * preferred. Range is 0 to 604800 seconds and default is 604800 seconds (7 days). - * - * <em>infinite</em> - Both '<em><valid-lifetime></em>' and '<em><<pref-lifetime></em>' - * are inifinte, no timeout. - * - * <em>no-advertise</em> - Do not send full router address in prefix - * advertisement. Default is to advertise (i.e. - This flag is off by default). - * - * <em>off-link</em> - Prefix is off-link, clear L-bit in packet. Default is on-link - * (i.e. - This flag is off and L-bit in packet is set by default and this prefix can - * be used for on-link determination). '<em>no-onlink</em>' also controls the L-bit. - * - * <em>no-autoconfig</em> - Do not use prefix for autoconfiguration, clear A-bit in packet. - * Default is autoconfig (i.e. - This flag is off and A-bit in packet is set by default. - * - * <em>no-onlink</em> - Do not use prefix for onlink determination, clear L-bit in packet. - * Default is on-link (i.e. - This flag is off and L-bit in packet is set by default and - * this prefix can be used for on-link determination). '<em>off-link</em>' also controls - * the L-bit. - * - * - * <b>Format 3: - Default of Prefix:</b> - * - * '<em><b>ip6 nd <interface> [no] prefix <ip6-address>/<width> default</b></em>' - * - * When a new prefix is added (or existing one is being overwritten) <em>default</em> - * uses default values for the prefix. If <em>no</em> is used, the <em>default</em> - * is ignored and the prefix is deleted. - * - * - * @cliexpar - * Example of how set a router advertisement option: - * @cliexcmd{ip6 nd GigabitEthernet2/0/0 ra-interval 100 20} - * Example of how to add a prefix: - * @cliexcmd{ip6 nd GigabitEthernet2/0/0 prefix fe80::fe:28ff:fe9c:75b3/64 infinite no-advertise} - * Example of how to delete a prefix: - * @cliexcmd{ip6 nd GigabitEthernet2/0/0 no prefix fe80::fe:28ff:fe9c:75b3/64} -?*/ -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (ip6_nd_command, static) = -{ - .path = "ip6 nd", - .short_help = "ip6 nd <interface> ...", - .function = ip6_neighbor_cmd, -}; -/* *INDENT-ON* */ - -clib_error_t * -ip6_neighbor_set_link_local_address (vlib_main_t * vm, u32 sw_if_index, - ip6_address_t * address) -{ - clib_error_t *error = 0; - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - u32 ri; - ip6_radv_t *radv_info; - vnet_main_t *vnm = vnet_get_main (); - ip6_ll_prefix_t pfx = { 0, }; - - if (!ip6_address_is_link_local_unicast (address)) - return (error = clib_error_return (0, "address not link-local", - format_unformat_error)); - - /* call enable ipv6 */ - enable_ip6_interface (vm, sw_if_index); - - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - - if (ri != ~0) - { - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - - pfx.ilp_sw_if_index = sw_if_index; - - pfx.ilp_addr = radv_info->link_local_address; - ip6_ll_table_entry_delete (&pfx); - - pfx.ilp_addr = *address; - ip6_ll_table_entry_update (&pfx, FIB_ROUTE_PATH_LOCAL); - - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - radv_info->link_local_address = *address; - } - else - { - vnm->api_errno = VNET_API_ERROR_IP6_NOT_ENABLED; - error = clib_error_return (0, "ip6 not enabled for interface", - format_unformat_error); - } - return error; -} - -/** - * @brief callback when an interface address is added or deleted - */ -static void -ip6_neighbor_add_del_interface_address (ip6_main_t * im, - uword opaque, - u32 sw_if_index, - ip6_address_t * address, - u32 address_length, - u32 if_address_index, u32 is_delete) -{ - vnet_main_t *vnm = vnet_get_main (); - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - u32 ri; - vlib_main_t *vm = vnm->vlib_main; - ip6_radv_t *radv_info; - ip6_address_t a; - - /* create solicited node multicast address for this interface address */ - ip6_set_solicited_node_multicast_address (&a, 0); - - a.as_u8[0xd] = address->as_u8[0xd]; - a.as_u8[0xe] = address->as_u8[0xe]; - a.as_u8[0xf] = address->as_u8[0xf]; - - if (!is_delete) - { - /* try to create radv_info - does nothing if ipv6 already enabled */ - enable_ip6_interface (vm, sw_if_index); - - /* look up the radv_t information for this interface */ - vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, - sw_if_index, ~0); - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - if (ri != ~0) - { - /* get radv_info */ - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - - /* add address */ - if (!ip6_address_is_link_local_unicast (address)) - radv_info->ref_count++; - - ip6_neighbor_add_mld_prefix (radv_info, &a); - } - } - else - { - - /* delete */ - /* look up the radv_t information for this interface */ - vec_validate_init_empty (nm->if_radv_pool_index_by_sw_if_index, - sw_if_index, ~0); - ri = nm->if_radv_pool_index_by_sw_if_index[sw_if_index]; - - if (ri != ~0) - { - /* get radv_info */ - radv_info = pool_elt_at_index (nm->if_radv_pool, ri); - - ip6_neighbor_del_mld_prefix (radv_info, &a); - - /* if interface up send MLDP "report" */ - radv_info->all_routers_mcast = 0; - - /* add address */ - if (!ip6_address_is_link_local_unicast (address)) - radv_info->ref_count--; - } - /* Ensure that IPv6 is disabled, and LL removed after ref_count reaches 0 */ - disable_ip6_interface (vm, sw_if_index); - } -} - -clib_error_t * -ip6_set_neighbor_limit (u32 neighbor_limit) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - - nm->limit_neighbor_cache_size = neighbor_limit; - return 0; -} - -static void -ip6_neighbor_table_bind (ip6_main_t * im, - uword opaque, - u32 sw_if_index, - u32 new_fib_index, u32 old_fib_index) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_neighbor_t *n = NULL; - u32 i, *to_re_add = 0; - - /* *INDENT-OFF* */ - pool_foreach (n, nm->neighbor_pool, - ({ - if (n->key.sw_if_index == sw_if_index) - vec_add1 (to_re_add, n - nm->neighbor_pool); - })); - /* *INDENT-ON* */ - - for (i = 0; i < vec_len (to_re_add); i++) - { - n = pool_elt_at_index (nm->neighbor_pool, to_re_add[i]); - ip6_neighbor_adj_fib_remove (n, old_fib_index); - ip6_neighbor_adj_fib_add (n, new_fib_index); - } - vec_free (to_re_add); -} - -static clib_error_t * -ip6_neighbor_init (vlib_main_t * vm) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_main_t *im = &ip6_main; - - mhash_init (&nm->neighbor_index_by_key, - /* value size */ sizeof (uword), - /* key size */ sizeof (ip6_neighbor_key_t)); - - icmp6_register_type (vm, ICMP6_neighbor_solicitation, - ip6_icmp_neighbor_solicitation_node.index); - icmp6_register_type (vm, ICMP6_neighbor_advertisement, - ip6_icmp_neighbor_advertisement_node.index); - icmp6_register_type (vm, ICMP6_router_solicitation, - ip6_icmp_router_solicitation_node.index); - icmp6_register_type (vm, ICMP6_router_advertisement, - ip6_icmp_router_advertisement_node.index); - - /* handler node for ip6 neighbor discovery events and timers */ - vlib_register_node (vm, &ip6_icmp_neighbor_discovery_event_node); - - /* add call backs */ - ip6_add_del_interface_address_callback_t cb; - clib_memset (&cb, 0x0, sizeof (ip6_add_del_interface_address_callback_t)); - - /* when an interface address changes... */ - cb.function = ip6_neighbor_add_del_interface_address; - cb.function_opaque = 0; - vec_add1 (im->add_del_interface_address_callbacks, cb); - - ip6_table_bind_callback_t cbt; - cbt.function = ip6_neighbor_table_bind; - cbt.function_opaque = 0; - vec_add1 (im->table_bind_callbacks, cbt); - - mhash_init (&nm->pending_resolutions_by_address, - /* value size */ sizeof (uword), - /* key size */ sizeof (ip6_address_t)); - - mhash_init (&nm->mac_changes_by_address, - /* value size */ sizeof (uword), - /* key size */ sizeof (ip6_address_t)); - - /* default, configurable */ - nm->limit_neighbor_cache_size = 50000; - - nm->wc_ip6_nd_publisher_node = (uword) ~ 0; - - nm->ip6_ra_publisher_node = (uword) ~ 0; - -#if 0 - /* $$$$ Hack fix for today */ - vec_validate_init_empty - (im->discover_neighbor_next_index_by_hw_if_index, 32, 0 /* drop */ ); -#endif - - return 0; -} - -VLIB_INIT_FUNCTION (ip6_neighbor_init); - - -void -vnet_register_ip6_neighbor_resolution_event (vnet_main_t * vnm, - void *address_arg, - uword node_index, - uword type_opaque, uword data) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_address_t *address = address_arg; - uword *p; - pending_resolution_t *pr; - - pool_get (nm->pending_resolutions, pr); - memset (pr, 0, sizeof (*pr)); - - pr->next_index = ~0; - pr->node_index = node_index; - pr->type_opaque = type_opaque; - pr->data = data; - - p = mhash_get (&nm->pending_resolutions_by_address, address); - if (p) - { - /* Insert new resolution at the head of the list */ - pr->next_index = p[0]; - mhash_unset (&nm->pending_resolutions_by_address, address, 0); - } - - mhash_set (&nm->pending_resolutions_by_address, address, - pr - nm->pending_resolutions, 0 /* old value */ ); -} - -int -vnet_add_del_ip6_nd_change_event (vnet_main_t * vnm, - ip6_nd_change_event_cb_t data_callback, - u32 pid, - void *address_arg, - uword node_index, - uword type_opaque, uword data, int is_add) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_address_t *address = address_arg; - - /* Try to find an existing entry */ - u32 *first = (u32 *) mhash_get (&nm->mac_changes_by_address, address); - u32 *p = first; - pending_resolution_t *mc; - while (p && *p != ~0) - { - mc = pool_elt_at_index (nm->mac_changes, *p); - if (mc->node_index == node_index && mc->type_opaque == type_opaque - && mc->pid == pid) - break; - p = &mc->next_index; - } - - int found = p && *p != ~0; - if (is_add) - { - if (found) - return VNET_API_ERROR_ENTRY_ALREADY_EXISTS; - - pool_get (nm->mac_changes, mc); - memset (mc, 0, sizeof (*mc)); - /* *INDENT-OFF* */ - *mc = (pending_resolution_t) - { - .next_index = ~0, - .node_index = node_index, - .type_opaque = type_opaque, - .data = data, - .data_callback = data_callback, - .pid = pid, - }; - /* *INDENT-ON* */ - - /* Insert new resolution at the end of the list */ - u32 new_idx = mc - nm->mac_changes; - if (p) - p[0] = new_idx; - else - mhash_set (&nm->mac_changes_by_address, address, new_idx, 0); - } - else - { - if (!found) - return VNET_API_ERROR_NO_SUCH_ENTRY; - - /* Clients may need to clean up pool entries, too */ - if (data_callback) - (data_callback) (mc->data, NULL /* no new mac addrs */ , 0, NULL); - - /* Remove the entry from the list and delete the entry */ - *p = mc->next_index; - pool_put (nm->mac_changes, mc); - - /* Remove from hash if we deleted the last entry */ - if (*p == ~0 && p == first) - mhash_unset (&nm->mac_changes_by_address, address, 0); - } - return 0; -} - -int -vnet_ip6_nd_term (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_buffer_t * p0, - ethernet_header_t * eth, - ip6_header_t * ip, u32 sw_if_index, u16 bd_index) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - icmp6_neighbor_solicitation_or_advertisement_header_t *ndh; - mac_address_t mac; - - mac_address_from_bytes (&mac, eth->src_address); - ndh = ip6_next_header (ip); - if (ndh->icmp.type != ICMP6_neighbor_solicitation && - ndh->icmp.type != ICMP6_neighbor_advertisement) - return 0; - - if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) && - (p0->flags & VLIB_BUFFER_IS_TRACED))) - { - u8 *t0 = vlib_add_trace (vm, node, p0, - sizeof (icmp6_input_trace_t)); - clib_memcpy (t0, ip, sizeof (icmp6_input_trace_t)); - } - - /* Check if anyone want ND events for L2 BDs */ - if (PREDICT_FALSE - (nm->wc_ip6_nd_publisher_node != (uword) ~ 0 - && !ip6_address_is_link_local_unicast (&ip->src_address))) - { - vnet_nd_wc_publish (sw_if_index, &mac, &ip->src_address); - } - - /* Check if MAC entry exsist for solicited target IP */ - if (ndh->icmp.type == ICMP6_neighbor_solicitation) - { - icmp6_neighbor_discovery_ethernet_link_layer_address_option_t *opt; - l2_bridge_domain_t *bd_config; - u8 *macp; - - opt = (void *) (ndh + 1); - if ((opt->header.type != - ICMP6_NEIGHBOR_DISCOVERY_OPTION_source_link_layer_address) || - (opt->header.n_data_u64s != 1)) - return 0; /* source link layer address option not present */ - - bd_config = vec_elt_at_index (l2input_main.bd_configs, bd_index); - macp = - (u8 *) hash_get_mem (bd_config->mac_by_ip6, &ndh->target_address); - if (macp) - { /* found ip-mac entry, generate eighbor advertisement response */ - int bogus_length; - vlib_node_runtime_t *error_node = - vlib_node_get_runtime (vm, ip6_icmp_input_node.index); - ip->dst_address = ip->src_address; - ip->src_address = ndh->target_address; - ip->hop_limit = 255; - opt->header.type = - ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address; - clib_memcpy (opt->ethernet_address, macp, 6); - ndh->icmp.type = ICMP6_neighbor_advertisement; - ndh->advertisement_flags = clib_host_to_net_u32 - (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_SOLICITED | - ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE); - ndh->icmp.checksum = 0; - ndh->icmp.checksum = - ip6_tcp_udp_icmp_compute_checksum (vm, p0, ip, &bogus_length); - clib_memcpy (eth->dst_address, eth->src_address, 6); - clib_memcpy (eth->src_address, macp, 6); - vlib_error_count (vm, error_node->node_index, - ICMP6_ERROR_NEIGHBOR_ADVERTISEMENTS_TX, 1); - return 1; - } - } - - return 0; - -} - -int -ip6_neighbor_proxy_add_del (u32 sw_if_index, ip6_address_t * addr, u8 is_del) -{ - u32 fib_index; - - fib_prefix_t pfx = { - .fp_len = 128, - .fp_proto = FIB_PROTOCOL_IP6, - .fp_addr = { - .ip6 = *addr, - }, - }; - ip46_address_t nh = { - .ip6 = *addr, - }; - - fib_index = ip6_fib_table_get_index_for_sw_if_index (sw_if_index); - - if (~0 == fib_index) - return VNET_API_ERROR_NO_SUCH_FIB; - - if (is_del) - { - fib_table_entry_path_remove (fib_index, - &pfx, - FIB_SOURCE_IP6_ND_PROXY, - DPO_PROTO_IP6, - &nh, - sw_if_index, - ~0, 1, FIB_ROUTE_PATH_FLAG_NONE); - /* flush the ND cache of this address if it's there */ - vnet_unset_ip6_ethernet_neighbor (vlib_get_main (), sw_if_index, addr); - } - else - { - fib_table_entry_path_add (fib_index, - &pfx, - FIB_SOURCE_IP6_ND_PROXY, - FIB_ENTRY_FLAG_NONE, - DPO_PROTO_IP6, - &nh, - sw_if_index, - ~0, 1, NULL, FIB_ROUTE_PATH_FLAG_NONE); - } - return (0); -} - -static clib_error_t * -set_ip6_nd_proxy_cmd (vlib_main_t * vm, - unformat_input_t * input, vlib_cli_command_t * cmd) -{ - vnet_main_t *vnm = vnet_get_main (); - clib_error_t *error = 0; - ip6_address_t addr; - u32 sw_if_index; - u8 is_del = 0; - - if (unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index)) - { - /* get the rest of the command */ - while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) - { - if (unformat (input, "%U", unformat_ip6_address, &addr)) - break; - else if (unformat (input, "delete") || unformat (input, "del")) - is_del = 1; - else - return (unformat_parse_error (input)); - } - } - - ip6_neighbor_proxy_add_del (sw_if_index, &addr, is_del); - - return error; -} - -/* *INDENT-OFF* */ -VLIB_CLI_COMMAND (set_ip6_nd_proxy_command, static) = -{ - .path = "set ip6 nd proxy", - .short_help = "set ip6 nd proxy <HOST> <INTERFACE>", - .function = set_ip6_nd_proxy_cmd, -}; -/* *INDENT-ON* */ - -void -ethernet_ndp_change_mac (u32 sw_if_index) -{ - ip6_neighbor_main_t *nm = &ip6_neighbor_main; - ip6_neighbor_t *n; - adj_index_t ai; - - /* *INDENT-OFF* */ - pool_foreach (n, nm->neighbor_pool, - ({ - if (n->key.sw_if_index == sw_if_index) - { - adj_nbr_walk_nh6 (sw_if_index, - &n->key.ip6_address, - ip6_nd_mk_complete_walk, n); - } - })); - /* *INDENT-ON* */ - - ai = adj_glean_get (FIB_PROTOCOL_IP6, sw_if_index); - - if (ADJ_INDEX_INVALID != ai) - adj_glean_update_rewrite (ai); -} - -void -send_ip6_na (vlib_main_t * vm, u32 sw_if_index) -{ - ip6_main_t *i6m = &ip6_main; - ip6_address_t *ip6_addr = ip6_interface_first_address (i6m, sw_if_index); - - send_ip6_na_w_addr (vm, ip6_addr, sw_if_index); -} - -void -send_ip6_na_w_addr (vlib_main_t * vm, - const ip6_address_t * ip6_addr, u32 sw_if_index) -{ - ip6_main_t *i6m = &ip6_main; - vnet_main_t *vnm = vnet_get_main (); - u8 *rewrite, rewrite_len; - vnet_hw_interface_t *hi = vnet_get_sup_hw_interface (vnm, sw_if_index); - u8 dst_address[6]; - - if (ip6_addr) - { - clib_warning - ("Sending unsolicitated NA IP6 address %U on sw_if_idex %d", - format_ip6_address, ip6_addr, sw_if_index); - - /* Form unsolicited neighbor advertisement packet from NS pkt template */ - int bogus_length; - u32 bi = 0; - icmp6_neighbor_solicitation_header_t *h = - vlib_packet_template_get_packet (vm, - &i6m->discover_neighbor_packet_template, - &bi); - if (!h) - return; - - ip6_set_reserved_multicast_address (&h->ip.dst_address, - IP6_MULTICAST_SCOPE_link_local, - IP6_MULTICAST_GROUP_ID_all_hosts); - h->ip.src_address = ip6_addr[0]; - h->neighbor.icmp.type = ICMP6_neighbor_advertisement; - h->neighbor.target_address = ip6_addr[0]; - h->neighbor.advertisement_flags = clib_host_to_net_u32 - (ICMP6_NEIGHBOR_ADVERTISEMENT_FLAG_OVERRIDE); - h->link_layer_option.header.type = - ICMP6_NEIGHBOR_DISCOVERY_OPTION_target_link_layer_address; - clib_memcpy (h->link_layer_option.ethernet_address, - hi->hw_address, vec_len (hi->hw_address)); - h->neighbor.icmp.checksum = - ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h->ip, &bogus_length); - ASSERT (bogus_length == 0); - - /* Setup MAC header with IP6 Etype and mcast DMAC */ - vlib_buffer_t *b = vlib_get_buffer (vm, bi); - ip6_multicast_ethernet_address (dst_address, - IP6_MULTICAST_GROUP_ID_all_hosts); - rewrite = - ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_IP6, dst_address); - rewrite_len = vec_len (rewrite); - vlib_buffer_advance (b, -rewrite_len); - ethernet_header_t *e = vlib_buffer_get_current (b); - clib_memcpy (e->dst_address, rewrite, rewrite_len); - vec_free (rewrite); - - /* Send unsolicited ND advertisement packet out the specified interface */ - vnet_buffer (b)->sw_if_index[VLIB_RX] = - vnet_buffer (b)->sw_if_index[VLIB_TX] = sw_if_index; - vlib_frame_t *f = vlib_get_frame_to_node (vm, hi->output_node_index); - u32 *to_next = vlib_frame_vector_args (f); - to_next[0] = bi; - f->n_vectors = 1; - vlib_put_frame_to_node (vm, hi->output_node_index, f); - } -} - -/* - * fd.io coding-style-patch-verification: ON - * - * Local Variables: - * eval: (c-set-style "gnu") - * End: - */ |