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>
diff --git a/src/vnet/ethernet/arp.c b/src/vnet/ethernet/arp.c
deleted file mode 100644
index 6b1069e..0000000
--- a/src/vnet/ethernet/arp.c
+++ /dev/null
@@ -1,3062 +0,0 @@
-/*
- * ethernet/arp.c: IP v4 ARP node
- *
- * 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/ip_neighbor.h>
-#include <vnet/ip/ip6.h>
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/ethernet/arp.h>
-#include <vnet/l2/l2_input.h>
-#include <vppinfra/mhash.h>
-#include <vnet/fib/ip4_fib.h>
-#include <vnet/fib/fib_entry_src.h>
-#include <vnet/adj/adj_nbr.h>
-#include <vnet/adj/adj_mcast.h>
-#include <vnet/mpls/mpls.h>
-#include <vnet/l2/feat_bitmap.h>
-
-#include <vlibmemory/api.h>
-
-/**
- * @file
- * @brief IPv4 ARP.
- *
- * This file contains code to manage the IPv4 ARP tables (IP Address
- * to MAC Address lookup).
- */
-
-
-/**
- * @brief Per-interface ARP configuration and state
- */
-typedef struct ethernet_arp_interface_t_
-{
- /**
- * Hash table of ARP entries.
- * Since this hash table is per-interface, the key is only the IPv4 address.
- */
- uword *arp_entries;
- /**
- * Is ARP enabled on this interface
- */
- u32 enabled;
- /**
- * Is Proxy ARP enabled on this interface
- */
- u32 proxy_enabled;
-} ethernet_arp_interface_t;
-
-typedef struct
-{
- ip4_address_t lo_addr;
- ip4_address_t hi_addr;
- u32 fib_index;
-} ethernet_proxy_arp_t;
-
-typedef struct
-{
- u32 next_index;
- uword node_index;
- uword type_opaque;
- uword data;
- /* Used for arp event notification only */
- arp_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 */
- uword *pending_resolutions_by_address;
- pending_resolution_t *pending_resolutions;
-
- /* Mac address change notification */
- uword *mac_changes_by_address;
- pending_resolution_t *mac_changes;
-
- ethernet_arp_ip4_entry_t *ip4_entry_pool;
-
- /* ARP attack mitigation */
- u32 arp_delete_rotor;
- u32 limit_arp_cache_size;
-
- /** Per interface state */
- ethernet_arp_interface_t *ethernet_arp_by_sw_if_index;
-
- /* Proxy arp vector */
- ethernet_proxy_arp_t *proxy_arps;
-
- uword wc_ip4_arp_publisher_node;
- uword wc_ip4_arp_publisher_et;
-
- /* ARP feature arc index */
- u8 feature_arc_index;
-} ethernet_arp_main_t;
-
-static ethernet_arp_main_t ethernet_arp_main;
-
-typedef struct
-{
- u32 sw_if_index;
- ip4_address_t ip4;
- mac_address_t mac;
- ip_neighbor_flags_t nbr_flags;
- u32 flags;
-#define ETHERNET_ARP_ARGS_REMOVE (1<<0)
-#define ETHERNET_ARP_ARGS_FLUSH (1<<1)
-#define ETHERNET_ARP_ARGS_POPULATE (1<<2)
-#define ETHERNET_ARP_ARGS_WC_PUB (1<<3)
-} vnet_arp_set_ip4_over_ethernet_rpc_args_t;
-
-static const u8 vrrp_prefix[] = { 0x00, 0x00, 0x5E, 0x00, 0x01 };
-
-/* Node index for send_garp_na_process */
-u32 send_garp_na_process_node_index;
-
-static void
-set_ip4_over_ethernet_rpc_callback (vnet_arp_set_ip4_over_ethernet_rpc_args_t
- * a);
-
-static u8 *
-format_ethernet_arp_hardware_type (u8 * s, va_list * va)
-{
- ethernet_arp_hardware_type_t h = va_arg (*va, ethernet_arp_hardware_type_t);
- char *t = 0;
- switch (h)
- {
-#define _(n,f) case n: t = #f; break;
- foreach_ethernet_arp_hardware_type;
-#undef _
-
- default:
- return format (s, "unknown 0x%x", h);
- }
-
- return format (s, "%s", t);
-}
-
-static u8 *
-format_ethernet_arp_opcode (u8 * s, va_list * va)
-{
- ethernet_arp_opcode_t o = va_arg (*va, ethernet_arp_opcode_t);
- char *t = 0;
- switch (o)
- {
-#define _(f) case ETHERNET_ARP_OPCODE_##f: t = #f; break;
- foreach_ethernet_arp_opcode;
-#undef _
-
- default:
- return format (s, "unknown 0x%x", o);
- }
-
- return format (s, "%s", t);
-}
-
-static uword
-unformat_ethernet_arp_opcode_host_byte_order (unformat_input_t * input,
- va_list * args)
-{
- int *result = va_arg (*args, int *);
- ethernet_arp_main_t *am = ðernet_arp_main;
- int x, i;
-
- /* Numeric opcode. */
- if (unformat (input, "0x%x", &x) || unformat (input, "%d", &x))
- {
- if (x >= (1 << 16))
- return 0;
- *result = x;
- return 1;
- }
-
- /* Named type. */
- if (unformat_user (input, unformat_vlib_number_by_name,
- am->opcode_by_name, &i))
- {
- *result = i;
- return 1;
- }
-
- return 0;
-}
-
-static uword
-unformat_ethernet_arp_opcode_net_byte_order (unformat_input_t * input,
- va_list * args)
-{
- int *result = va_arg (*args, int *);
- if (!unformat_user
- (input, unformat_ethernet_arp_opcode_host_byte_order, result))
- return 0;
-
- *result = clib_host_to_net_u16 ((u16) * result);
- return 1;
-}
-
-static u8 *
-format_ethernet_arp_header (u8 * s, va_list * va)
-{
- ethernet_arp_header_t *a = va_arg (*va, ethernet_arp_header_t *);
- u32 max_header_bytes = va_arg (*va, u32);
- u32 indent;
- u16 l2_type, l3_type;
-
- if (max_header_bytes != 0 && sizeof (a[0]) > max_header_bytes)
- return format (s, "ARP header truncated");
-
- l2_type = clib_net_to_host_u16 (a->l2_type);
- l3_type = clib_net_to_host_u16 (a->l3_type);
-
- indent = format_get_indent (s);
-
- s = format (s, "%U, type %U/%U, address size %d/%d",
- format_ethernet_arp_opcode, clib_net_to_host_u16 (a->opcode),
- format_ethernet_arp_hardware_type, l2_type,
- format_ethernet_type, l3_type,
- a->n_l2_address_bytes, a->n_l3_address_bytes);
-
- if (l2_type == ETHERNET_ARP_HARDWARE_TYPE_ethernet
- && l3_type == ETHERNET_TYPE_IP4)
- {
- s = format (s, "\n%U%U/%U -> %U/%U",
- format_white_space, indent,
- format_mac_address_t, &a->ip4_over_ethernet[0].mac,
- format_ip4_address, &a->ip4_over_ethernet[0].ip4,
- format_mac_address_t, &a->ip4_over_ethernet[1].mac,
- format_ip4_address, &a->ip4_over_ethernet[1].ip4);
- }
- else
- {
- uword n2 = a->n_l2_address_bytes;
- uword n3 = a->n_l3_address_bytes;
- s = format (s, "\n%U%U/%U -> %U/%U",
- format_white_space, indent,
- format_hex_bytes, a->data + 0 * n2 + 0 * n3, n2,
- format_hex_bytes, a->data + 1 * n2 + 0 * n3, n3,
- format_hex_bytes, a->data + 1 * n2 + 1 * n3, n2,
- format_hex_bytes, a->data + 2 * n2 + 1 * n3, n3);
- }
-
- return s;
-}
-
-u8 *
-format_ethernet_arp_ip4_entry (u8 * s, va_list * va)
-{
- vnet_main_t *vnm = va_arg (*va, vnet_main_t *);
- ethernet_arp_ip4_entry_t *e = va_arg (*va, ethernet_arp_ip4_entry_t *);
- vnet_sw_interface_t *si;
-
- if (!e)
- return format (s, "%=12s%=16s%=6s%=20s%=24s", "Time", "IP4",
- "Flags", "Ethernet", "Interface");
-
- si = vnet_get_sw_interface (vnm, e->sw_if_index);
-
- return format (s, "%=12U%=16U%=6U%=20U%U",
- format_vlib_time, vnm->vlib_main, e->time_last_updated,
- format_ip4_address, &e->ip4_address,
- format_ip_neighbor_flags, e->flags,
- format_mac_address_t, &e->mac,
- format_vnet_sw_interface_name, vnm, si);
-}
-
-typedef struct
-{
- u8 packet_data[64];
-} ethernet_arp_input_trace_t;
-
-static u8 *
-format_ethernet_arp_input_trace (u8 * s, va_list * va)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
- ethernet_arp_input_trace_t *t = va_arg (*va, ethernet_arp_input_trace_t *);
-
- s = format (s, "%U",
- format_ethernet_arp_header,
- t->packet_data, sizeof (t->packet_data));
-
- return s;
-}
-
-static u8 *
-format_arp_term_input_trace (u8 * s, va_list * va)
-{
- CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
- CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
- ethernet_arp_input_trace_t *t = va_arg (*va, ethernet_arp_input_trace_t *);
-
- /* arp-term trace data saved is either arp or ip6/icmp6 packet:
- - for arp, the 1st 16-bit field is hw type of value of 0x0001.
- - for ip6, the first nibble has value of 6. */
- s = format (s, "%U", t->packet_data[0] == 0 ?
- format_ethernet_arp_header : format_ip6_header,
- t->packet_data, sizeof (t->packet_data));
-
- return s;
-}
-
-static void
-arp_nbr_probe (ip_adjacency_t * adj)
-{
- vnet_main_t *vnm = vnet_get_main ();
- ip4_main_t *im = &ip4_main;
- ip_interface_address_t *ia;
- ethernet_arp_header_t *h;
- vnet_hw_interface_t *hi;
- vnet_sw_interface_t *si;
- ip4_address_t *src;
- vlib_buffer_t *b;
- vlib_main_t *vm;
- u32 bi = 0;
-
- vm = vlib_get_main ();
-
- si = vnet_get_sw_interface (vnm, adj->rewrite_header.sw_if_index);
-
- if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
- {
- return;
- }
-
- src =
- ip4_interface_address_matching_destination (im,
- &adj->sub_type.nbr.next_hop.
- ip4,
- adj->rewrite_header.
- sw_if_index, &ia);
- if (!src)
- {
- return;
- }
-
- h =
- vlib_packet_template_get_packet (vm, &im->ip4_arp_request_packet_template,
- &bi);
- if (!h)
- return;
-
- hi = vnet_get_sup_hw_interface (vnm, adj->rewrite_header.sw_if_index);
-
- mac_address_from_bytes (&h->ip4_over_ethernet[0].mac, hi->hw_address);
-
- h->ip4_over_ethernet[0].ip4 = src[0];
- h->ip4_over_ethernet[1].ip4 = adj->sub_type.nbr.next_hop.ip4;
-
- 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
-arp_mk_complete (adj_index_t ai, ethernet_arp_ip4_entry_t * e)
-{
- adj_nbr_update_rewrite
- (ai, ADJ_NBR_REWRITE_FLAG_COMPLETE,
- ethernet_build_rewrite (vnet_get_main (),
- e->sw_if_index,
- adj_get_link_type (ai), &e->mac));
-}
-
-static void
-arp_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,
- VNET_LINK_ARP,
- VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST));
-}
-
-static ethernet_arp_ip4_entry_t *
-arp_entry_find (ethernet_arp_interface_t * eai, const ip4_address_t * addr)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_ip4_entry_t *e = NULL;
- uword *p;
-
- if (NULL != eai->arp_entries)
- {
- p = hash_get (eai->arp_entries, addr->as_u32);
- if (!p)
- return (NULL);
-
- e = pool_elt_at_index (am->ip4_entry_pool, p[0]);
- }
-
- return (e);
-}
-
-static adj_walk_rc_t
-arp_mk_complete_walk (adj_index_t ai, void *ctx)
-{
- ethernet_arp_ip4_entry_t *e = ctx;
-
- arp_mk_complete (ai, e);
-
- return (ADJ_WALK_RC_CONTINUE);
-}
-
-static adj_walk_rc_t
-arp_mk_incomplete_walk (adj_index_t ai, void *ctx)
-{
- arp_mk_incomplete (ai);
-
- return (ADJ_WALK_RC_CONTINUE);
-}
-
-static int
-arp_is_enabled (ethernet_arp_main_t * am, u32 sw_if_index)
-{
- if (vec_len (am->ethernet_arp_by_sw_if_index) <= sw_if_index)
- return 0;
-
- return (am->ethernet_arp_by_sw_if_index[sw_if_index].enabled);
-}
-
-static void
-arp_enable (ethernet_arp_main_t * am, u32 sw_if_index)
-{
- if (arp_is_enabled (am, sw_if_index))
- return;
-
- vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index);
-
- am->ethernet_arp_by_sw_if_index[sw_if_index].enabled = 1;
-
- vnet_feature_enable_disable ("arp", "arp-reply", sw_if_index, 1, NULL, 0);
- vnet_feature_enable_disable ("arp", "arp-disabled", sw_if_index, 0, NULL,
- 0);
-}
-
-static int
-vnet_arp_flush_ip4_over_ethernet_internal (vnet_main_t * vnm,
- vnet_arp_set_ip4_over_ethernet_rpc_args_t
- * args);
-
-static void
-arp_disable (ethernet_arp_main_t * am, u32 sw_if_index)
-{
- ethernet_arp_interface_t *eai;
- ethernet_arp_ip4_entry_t *e;
- u32 i, *to_delete = 0;
- hash_pair_t *pair;
-
- if (!arp_is_enabled (am, sw_if_index))
- return;
-
- vnet_feature_enable_disable ("arp", "arp-disabled", sw_if_index, 1, NULL,
- 0);
- vnet_feature_enable_disable ("arp", "arp-reply", sw_if_index, 0, NULL, 0);
-
- eai = &am->ethernet_arp_by_sw_if_index[sw_if_index];
-
-
- /* *INDENT-OFF* */
- hash_foreach_pair (pair, eai->arp_entries,
- ({
- e = pool_elt_at_index(am->ip4_entry_pool,
- pair->value[0]);
- vec_add1 (to_delete, e - am->ip4_entry_pool);
- }));
- /* *INDENT-ON* */
-
- for (i = 0; i < vec_len (to_delete); i++)
- {
- e = pool_elt_at_index (am->ip4_entry_pool, to_delete[i]);
-
- vnet_arp_set_ip4_over_ethernet_rpc_args_t delme = {
- .ip4.as_u32 = e->ip4_address.as_u32,
- .sw_if_index = e->sw_if_index,
- .flags = ETHERNET_ARP_ARGS_FLUSH,
- };
- mac_address_copy (&delme.mac, &e->mac);
-
- vnet_arp_flush_ip4_over_ethernet_internal (vnet_get_main (), &delme);
- }
-
- vec_free (to_delete);
-
- eai->enabled = 0;
-}
-
-void
-arp_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_interface_t *arp_int;
- ethernet_arp_ip4_entry_t *e;
- ip_adjacency_t *adj;
-
- adj = adj_get (ai);
-
- arp_enable (am, sw_if_index);
- arp_int = &am->ethernet_arp_by_sw_if_index[sw_if_index];
- e = arp_entry_find (arp_int, &adj->sub_type.nbr.next_hop.ip4);
-
- switch (adj->lookup_next_index)
- {
- case IP_LOOKUP_NEXT_GLEAN:
- adj_glean_update_rewrite (ai);
- break;
- case IP_LOOKUP_NEXT_ARP:
- if (NULL != e)
- {
- adj_nbr_walk_nh4 (sw_if_index,
- &e->ip4_address, arp_mk_complete_walk, e);
- }
- else
- {
- /*
- * no matching ARP entry.
- * construct the rewrite required to for an ARP 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_ARP,
- 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 ARP. 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.
- */
- arp_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_IP4,
- 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_ip4_mcast_dst_addr ());
- offset = vec_len (rewrite) - 2;
-
- /*
- * 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.
- * Offset is 2 bytes into the MAC destination address.
- */
- 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
-arp_adj_fib_add (ethernet_arp_ip4_entry_t * e, u32 fib_index)
-{
- fib_prefix_t pfx = {
- .fp_len = 32,
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_addr.ip4 = e->ip4_address,
- };
-
- e->fib_entry_index =
- fib_table_entry_path_add (fib_index, &pfx, FIB_SOURCE_ADJ,
- FIB_ENTRY_FLAG_ATTACHED,
- DPO_PROTO_IP4, &pfx.fp_addr,
- e->sw_if_index, ~0, 1, NULL,
- FIB_ROUTE_PATH_FLAG_NONE);
- fib_table_lock (fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_ADJ);
-}
-
-static void
-arp_adj_fib_remove (ethernet_arp_ip4_entry_t * e, u32 fib_index)
-{
- if (FIB_NODE_INDEX_INVALID != e->fib_entry_index)
- {
- fib_prefix_t pfx = {
- .fp_len = 32,
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_addr.ip4 = e->ip4_address,
- };
- u32 fib_index;
-
- fib_index = ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index);
-
- fib_table_entry_path_remove (fib_index, &pfx,
- FIB_SOURCE_ADJ,
- DPO_PROTO_IP4,
- &pfx.fp_addr,
- e->sw_if_index, ~0, 1,
- FIB_ROUTE_PATH_FLAG_NONE);
- fib_table_unlock (fib_index, FIB_PROTOCOL_IP4, FIB_SOURCE_ADJ);
- }
-}
-
-static ethernet_arp_ip4_entry_t *
-force_reuse_arp_entry (void)
-{
- ethernet_arp_ip4_entry_t *e;
- ethernet_arp_main_t *am = ðernet_arp_main;
- u32 count = 0;
- u32 index = pool_next_index (am->ip4_entry_pool, am->arp_delete_rotor);
- if (index == ~0) /* Try again from elt 0 */
- index = pool_next_index (am->ip4_entry_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 */
- e = pool_elt_at_index (am->ip4_entry_pool, index);
- am->arp_delete_rotor = index;
- index = pool_next_index (am->ip4_entry_pool, index);
- }
- while (e->flags & IP_NEIGHBOR_FLAG_STATIC);
-
- /* Remove ARP entry from its interface and update fib */
- hash_unset
- (am->ethernet_arp_by_sw_if_index[e->sw_if_index].arp_entries,
- e->ip4_address.as_u32);
- arp_adj_fib_remove
- (e, ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index));
- adj_nbr_walk_nh4 (e->sw_if_index,
- &e->ip4_address, arp_mk_incomplete_walk, e);
- return e;
-}
-
-static int
-vnet_arp_set_ip4_over_ethernet_internal (vnet_main_t * vnm,
- vnet_arp_set_ip4_over_ethernet_rpc_args_t
- * args)
-{
- ethernet_arp_ip4_entry_t *e = 0;
- ethernet_arp_main_t *am = ðernet_arp_main;
- vlib_main_t *vm = vlib_get_main ();
- int make_new_arp_cache_entry = 1;
- uword *p;
- pending_resolution_t *pr, *mc;
- ethernet_arp_interface_t *arp_int;
- u32 sw_if_index = args->sw_if_index;
-
- arp_enable (am, sw_if_index);
-
- arp_int = &am->ethernet_arp_by_sw_if_index[sw_if_index];
-
- if (NULL != arp_int->arp_entries)
- {
- p = hash_get (arp_int->arp_entries, args->ip4.as_u32);
- if (p)
- {
- e = pool_elt_at_index (am->ip4_entry_pool, p[0]);
-
- /* Refuse to over-write static arp. */
- if (!(args->nbr_flags & IP_NEIGHBOR_FLAG_STATIC) &&
- (e->flags & IP_NEIGHBOR_FLAG_STATIC))
- {
- /* if MAC address match, still check to send event */
- if (mac_address_equal (&e->mac, &args->mac))
- goto check_customers;
- return -2;
- }
- make_new_arp_cache_entry = 0;
- }
- }
-
- if (make_new_arp_cache_entry)
- {
- if (am->limit_arp_cache_size &&
- pool_elts (am->ip4_entry_pool) >= am->limit_arp_cache_size)
- {
- e = force_reuse_arp_entry ();
- if (NULL == e)
- return -2;
- }
- else
- pool_get (am->ip4_entry_pool, e);
-
- if (NULL == arp_int->arp_entries)
- arp_int->arp_entries = hash_create (0, sizeof (u32));
-
- hash_set (arp_int->arp_entries, args->ip4.as_u32,
- e - am->ip4_entry_pool);
-
- e->sw_if_index = sw_if_index;
- e->ip4_address = args->ip4;
- e->fib_entry_index = FIB_NODE_INDEX_INVALID;
- mac_address_copy (&e->mac, &args->mac);
-
- if (!(args->nbr_flags & IP_NEIGHBOR_FLAG_NO_FIB_ENTRY))
- {
- arp_adj_fib_add (e,
- ip4_fib_table_get_index_for_sw_if_index
- (e->sw_if_index));
- }
- else
- {
- e->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 (mac_address_equal (&e->mac, &args->mac))
- {
- e->time_last_updated = vlib_time_now (vm);
- goto check_customers;
- }
-
- /* Update ethernet address. */
- mac_address_copy (&e->mac, &args->mac);
- }
-
- /* Update time stamp and flags. */
- e->time_last_updated = vlib_time_now (vm);
- if (args->nbr_flags & IP_NEIGHBOR_FLAG_STATIC)
- {
- e->flags &= ~IP_NEIGHBOR_FLAG_DYNAMIC;
- e->flags |= IP_NEIGHBOR_FLAG_STATIC;
- }
- else
- {
- e->flags &= ~IP_NEIGHBOR_FLAG_STATIC;
- e->flags |= IP_NEIGHBOR_FLAG_DYNAMIC;
- }
-
- adj_nbr_walk_nh4 (sw_if_index, &e->ip4_address, arp_mk_complete_walk, e);
-
-check_customers:
- /* Customer(s) waiting for this address to be resolved? */
- p = hash_get (am->pending_resolutions_by_address, args->ip4.as_u32);
- if (p)
- {
- u32 next_index;
- next_index = p[0];
-
- while (next_index != (u32) ~ 0)
- {
- pr = pool_elt_at_index (am->pending_resolutions, next_index);
- vlib_process_signal_event (vm, pr->node_index,
- pr->type_opaque, pr->data);
- next_index = pr->next_index;
- pool_put (am->pending_resolutions, pr);
- }
-
- hash_unset (am->pending_resolutions_by_address, args->ip4.as_u32);
- }
-
- /* Customer(s) requesting ARP event for this address? */
- p = hash_get (am->mac_changes_by_address, args->ip4.as_u32);
- if (p)
- {
- u32 next_index;
- next_index = p[0];
-
- while (next_index != (u32) ~ 0)
- {
- int rv = 1;
- mc = pool_elt_at_index (am->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, &args->mac, sw_if_index, 0);
-
- /*
- * 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;
-}
-
-void
-vnet_register_ip4_arp_resolution_event (vnet_main_t * vnm,
- void *address_arg,
- uword node_index,
- uword type_opaque, uword data)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ip4_address_t *address = address_arg;
- uword *p;
- pending_resolution_t *pr;
-
- pool_get (am->pending_resolutions, pr);
-
- pr->next_index = ~0;
- pr->node_index = node_index;
- pr->type_opaque = type_opaque;
- pr->data = data;
- pr->data_callback = 0;
-
- p = hash_get (am->pending_resolutions_by_address, address->as_u32);
- if (p)
- {
- /* Insert new resolution at the head of the list */
- pr->next_index = p[0];
- hash_unset (am->pending_resolutions_by_address, address->as_u32);
- }
-
- hash_set (am->pending_resolutions_by_address, address->as_u32,
- pr - am->pending_resolutions);
-}
-
-int
-vnet_add_del_ip4_arp_change_event (vnet_main_t * vnm,
- arp_change_event_cb_t data_callback,
- u32 pid,
- void *address_arg,
- uword node_index,
- uword type_opaque, uword data, int is_add)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ip4_address_t *address = address_arg;
-
- /* Try to find an existing entry */
- u32 *first = (u32 *) hash_get (am->mac_changes_by_address, address->as_u32);
- u32 *p = first;
- pending_resolution_t *mc;
- while (p && *p != ~0)
- {
- mc = pool_elt_at_index (am->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 (am->mac_changes, 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 - am->mac_changes;
- if (p)
- p[0] = new_idx;
- else
- hash_set (am->mac_changes_by_address, address->as_u32, new_idx);
- }
- else
- {
- if (!found)
- return VNET_API_ERROR_NO_SUCH_ENTRY;
-
- /* Clients may need to clean up pool entries, too */
- if (data_callback)
- /* no new mac addrs */
- (data_callback) (mc->data, NULL, ~0, NULL);
-
- /* Remove the entry from the list and delete the entry */
- *p = mc->next_index;
- pool_put (am->mac_changes, mc);
-
- /* Remove from hash if we deleted the last entry */
- if (*p == ~0 && p == first)
- hash_unset (am->mac_changes_by_address, address->as_u32);
- }
- return 0;
-}
-
-/* Either we drop the packet or we send a reply to the sender. */
-typedef enum
-{
- ARP_REPLY_NEXT_DROP,
- ARP_REPLY_NEXT_REPLY_TX,
- ARP_REPLY_N_NEXT,
-} arp_reply_next_t;
-
-#define foreach_ethernet_arp_error \
- _ (replies_sent, "ARP replies sent") \
- _ (l2_type_not_ethernet, "L2 type not ethernet") \
- _ (l3_type_not_ip4, "L3 type not IP4") \
- _ (l3_src_address_not_local, "IP4 source address not local to subnet") \
- _ (l3_dst_address_not_local, "IP4 destination address not local to subnet") \
- _ (l3_dst_address_unset, "IP4 destination address is unset") \
- _ (l3_src_address_is_local, "IP4 source address matches local interface") \
- _ (l3_src_address_learned, "ARP request IP4 source address learned") \
- _ (replies_received, "ARP replies received") \
- _ (opcode_not_request, "ARP opcode not request") \
- _ (proxy_arp_replies_sent, "Proxy ARP replies sent") \
- _ (l2_address_mismatch, "ARP hw addr does not match L2 frame src addr") \
- _ (gratuitous_arp, "ARP probe or announcement dropped") \
- _ (interface_no_table, "Interface is not mapped to an IP table") \
- _ (interface_not_ip_enabled, "Interface is not IP enabled") \
- _ (unnumbered_mismatch, "RX interface is unnumbered to different subnet") \
-
-typedef enum
-{
-#define _(sym,string) ETHERNET_ARP_ERROR_##sym,
- foreach_ethernet_arp_error
-#undef _
- ETHERNET_ARP_N_ERROR,
-} ethernet_arp_reply_error_t;
-
-static int
-arp_unnumbered (vlib_buffer_t * p0,
- u32 input_sw_if_index, u32 conn_sw_if_index)
-{
- vnet_main_t *vnm = vnet_get_main ();
- vnet_interface_main_t *vim = &vnm->interface_main;
- vnet_sw_interface_t *si;
-
- /* verify that the input interface is unnumbered to the connected.
- * the connected interface is the interface on which the subnet is
- * configured */
- si = &vim->sw_interfaces[input_sw_if_index];
-
- if (!(si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED &&
- (si->unnumbered_sw_if_index == conn_sw_if_index)))
- {
- /* the input interface is not unnumbered to the interface on which
- * the sub-net is configured that covers the ARP request.
- * So this is not the case for unnumbered.. */
- return 0;
- }
-
- return !0;
-}
-
-static u32
-arp_learn (vnet_main_t * vnm,
- ethernet_arp_main_t * am, u32 sw_if_index,
- const ethernet_arp_ip4_over_ethernet_address_t * addr)
-{
- vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index, addr, 0);
- return (ETHERNET_ARP_ERROR_l3_src_address_learned);
-}
-
-typedef enum arp_input_next_t_
-{
- ARP_INPUT_NEXT_DROP,
- ARP_INPUT_NEXT_DISABLED,
- ARP_INPUT_N_NEXT,
-} arp_input_next_t;
-
-static uword
-arp_input (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- u32 n_left_from, next_index, *from, *to_next, n_left_to_next;
- ethernet_arp_main_t *am = ðernet_arp_main;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- 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 (ethernet_arp_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)
- {
- const ethernet_arp_header_t *arp0;
- arp_input_next_t next0;
- vlib_buffer_t *p0;
- u32 pi0, error0;
-
- pi0 = to_next[0] = from[0];
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- p0 = vlib_get_buffer (vm, pi0);
- arp0 = vlib_buffer_get_current (p0);
-
- error0 = ETHERNET_ARP_ERROR_replies_sent;
- next0 = ARP_INPUT_NEXT_DROP;
-
- error0 =
- (arp0->l2_type !=
- clib_net_to_host_u16 (ETHERNET_ARP_HARDWARE_TYPE_ethernet) ?
- ETHERNET_ARP_ERROR_l2_type_not_ethernet : error0);
- error0 =
- (arp0->l3_type !=
- clib_net_to_host_u16 (ETHERNET_TYPE_IP4) ?
- ETHERNET_ARP_ERROR_l3_type_not_ip4 : error0);
- error0 =
- (0 == arp0->ip4_over_ethernet[0].ip4.as_u32 ?
- ETHERNET_ARP_ERROR_l3_dst_address_unset : error0);
-
- if (ETHERNET_ARP_ERROR_replies_sent == error0)
- {
- next0 = ARP_INPUT_NEXT_DISABLED;
- vnet_feature_arc_start (am->feature_arc_index,
- vnet_buffer (p0)->sw_if_index[VLIB_RX],
- &next0, p0);
- }
- else
- p0->error = node->errors[error0];
-
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
- n_left_to_next, pi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
-}
-
-typedef enum arp_disabled_next_t_
-{
- ARP_DISABLED_NEXT_DROP,
- ARP_DISABLED_N_NEXT,
-} arp_disabled_next_t;
-
-#define foreach_arp_disabled_error \
- _ (DISABLED, "ARP Disabled on this interface") \
-
-typedef enum
-{
-#define _(sym,string) ARP_DISABLED_ERROR_##sym,
- foreach_arp_disabled_error
-#undef _
- ARP_DISABLED_N_ERROR,
-} arp_disabled_error_t;
-
-static char *arp_disabled_error_strings[] = {
-#define _(sym,string) string,
- foreach_arp_disabled_error
-#undef _
-};
-
-static uword
-arp_disabled (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- u32 n_left_from, next_index, *from, *to_next, n_left_to_next;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- 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 (ethernet_arp_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)
- {
- arp_disabled_next_t next0 = ARP_DISABLED_NEXT_DROP;
- vlib_buffer_t *p0;
- u32 pi0, error0;
-
- next0 = ARP_DISABLED_NEXT_DROP;
- error0 = ARP_DISABLED_ERROR_DISABLED;
-
- pi0 = to_next[0] = from[0];
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- p0 = vlib_get_buffer (vm, pi0);
- p0->error = node->errors[error0];
-
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
- n_left_to_next, pi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- return frame->n_vectors;
-}
-
-static_always_inline u32
-arp_mk_reply (vnet_main_t * vnm,
- vlib_buffer_t * p0,
- u32 sw_if_index0,
- const ip4_address_t * if_addr0,
- ethernet_arp_header_t * arp0, ethernet_header_t * eth_rx)
-{
- vnet_hw_interface_t *hw_if0;
- u8 *rewrite0, rewrite0_len;
- ethernet_header_t *eth_tx;
- u32 next0;
-
- /* Send a reply.
- An adjacency to the sender is not always present,
- so we use the interface to build us a rewrite string
- which will contain all the necessary tags. */
- rewrite0 = ethernet_build_rewrite (vnm, sw_if_index0,
- VNET_LINK_ARP, eth_rx->src_address);
- rewrite0_len = vec_len (rewrite0);
-
- /* Figure out how much to rewind current data from adjacency. */
- vlib_buffer_advance (p0, -rewrite0_len);
- eth_tx = vlib_buffer_get_current (p0);
-
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
- hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
-
- /* Send reply back through input interface */
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
- next0 = ARP_REPLY_NEXT_REPLY_TX;
-
- arp0->opcode = clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply);
-
- arp0->ip4_over_ethernet[1] = arp0->ip4_over_ethernet[0];
-
- mac_address_from_bytes (&arp0->ip4_over_ethernet[0].mac,
- hw_if0->hw_address);
- clib_mem_unaligned (&arp0->ip4_over_ethernet[0].ip4.data_u32, u32) =
- if_addr0->data_u32;
-
- /* Hardware must be ethernet-like. */
- ASSERT (vec_len (hw_if0->hw_address) == 6);
-
- /* the rx nd tx ethernet headers wil overlap in the case
- * when we received a tagged VLAN=0 packet, but we are sending
- * back untagged */
- clib_memcpy_fast (eth_tx, rewrite0, vec_len (rewrite0));
- vec_free (rewrite0);
-
- return (next0);
-}
-
-enum arp_dst_fib_type
-{
- ARP_DST_FIB_NONE,
- ARP_DST_FIB_ADJ,
- ARP_DST_FIB_CONN
-};
-
-/*
- * we're looking for FIB sources that indicate the destination
- * is attached. There may be interposed DPO prior to the one
- * we are looking for
- */
-static enum arp_dst_fib_type
-arp_dst_fib_check (const fib_node_index_t fei, fib_entry_flag_t * flags)
-{
- const fib_entry_t *entry = fib_entry_get (fei);
- const fib_entry_src_t *entry_src;
- fib_source_t src;
- /* *INDENT-OFF* */
- FOR_EACH_SRC_ADDED(entry, entry_src, src,
- ({
- *flags = fib_entry_get_flags_for_source (fei, src);
- if (fib_entry_is_sourced (fei, FIB_SOURCE_ADJ))
- return ARP_DST_FIB_ADJ;
- else if (FIB_ENTRY_FLAG_CONNECTED & *flags)
- return ARP_DST_FIB_CONN;
- }))
- /* *INDENT-ON* */
-
- return ARP_DST_FIB_NONE;
-}
-
-static uword
-arp_reply (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- vnet_main_t *vnm = vnet_get_main ();
- u32 n_left_from, next_index, *from, *to_next;
- u32 n_replies_sent = 0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- 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 (ethernet_arp_input_trace_t));
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- 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;
- ethernet_arp_header_t *arp0;
- ethernet_header_t *eth_rx;
- const ip4_address_t *if_addr0;
- u32 pi0, error0, next0, sw_if_index0, conn_sw_if_index0, fib_index0;
- u8 dst_is_local0, is_vrrp_reply0;
- fib_node_index_t dst_fei, src_fei;
- const fib_prefix_t *pfx0;
- fib_entry_flag_t src_flags, dst_flags;
-
- pi0 = from[0];
- to_next[0] = pi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- p0 = vlib_get_buffer (vm, pi0);
- arp0 = vlib_buffer_get_current (p0);
- /* Fill in ethernet header. */
- eth_rx = ethernet_buffer_get_header (p0);
-
- next0 = ARP_REPLY_NEXT_DROP;
- error0 = ETHERNET_ARP_ERROR_replies_sent;
- sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
-
- /* Check that IP address is local and matches incoming interface. */
- fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
- if (~0 == fib_index0)
- {
- error0 = ETHERNET_ARP_ERROR_interface_no_table;
- goto drop;
-
- }
-
- {
- /*
- * we're looking for FIB entries that indicate the source
- * is attached. There may be more specific non-attached
- * routes that match the source, but these do not influence
- * whether we respond to an ARP request, i.e. they do not
- * influence whether we are the correct way for the sender
- * to reach us, they only affect how we reach the sender.
- */
- fib_entry_t *src_fib_entry;
- const fib_prefix_t *pfx;
- fib_entry_src_t *src;
- fib_source_t source;
- int attached;
- int mask;
-
- mask = 32;
- attached = 0;
-
- do
- {
- src_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
- &arp0->
- ip4_over_ethernet[0].ip4,
- mask);
- src_fib_entry = fib_entry_get (src_fei);
-
- /*
- * It's possible that the source that provides the
- * flags we need, or the flags we must not have,
- * is not the best source, so check then all.
- */
- /* *INDENT-OFF* */
- FOR_EACH_SRC_ADDED(src_fib_entry, src, source,
- ({
- src_flags = fib_entry_get_flags_for_source (src_fei, source);
-
- /* Reject requests/replies with our local interface
- address. */
- if (FIB_ENTRY_FLAG_LOCAL & src_flags)
- {
- error0 = ETHERNET_ARP_ERROR_l3_src_address_is_local;
- /*
- * When VPP has an interface whose address is also
- * applied to a TAP interface on the host, then VPP's
- * TAP interface will be unnumbered to the 'real'
- * interface and do proxy ARP from the host.
- * The curious aspect of this setup is that ARP requests
- * from the host will come from the VPP's own address.
- * So don't drop immediately here, instead go see if this
- * is a proxy ARP case.
- */
- goto next_feature;
- }
- /* A Source must also be local to subnet of matching
- * interface address. */
- if ((FIB_ENTRY_FLAG_ATTACHED & src_flags) ||
- (FIB_ENTRY_FLAG_CONNECTED & src_flags))
- {
- attached = 1;
- break;
- }
- /*
- * else
- * The packet was sent from an address that is not
- * connected nor attached i.e. it is not from an
- * address that is covered by a link's sub-net,
- * nor is it a already learned host resp.
- */
- }));
- /* *INDENT-ON* */
-
- /*
- * shorter mask lookup for the next iteration.
- */
- pfx = fib_entry_get_prefix (src_fei);
- mask = pfx->fp_len - 1;
-
- /*
- * continue until we hit the default route or we find
- * the attached we are looking for. The most likely
- * outcome is we find the attached with the first source
- * on the first lookup.
- */
- }
- while (!attached &&
- !fib_entry_is_sourced (src_fei, FIB_SOURCE_DEFAULT_ROUTE));
-
- if (!attached)
- {
- /*
- * the matching route is a not attached, i.e. it was
- * added as a result of routing, rather than interface/ARP
- * configuration. If the matching route is not a host route
- * (i.e. a /32)
- */
- error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local;
- goto drop;
- }
- }
-
- dst_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
- &arp0->ip4_over_ethernet[1].ip4,
- 32);
- switch (arp_dst_fib_check (dst_fei, &dst_flags))
- {
- case ARP_DST_FIB_ADJ:
- /*
- * We matched an adj-fib on ths source subnet (a /32 previously
- * added as a result of ARP). If this request is a gratuitous
- * ARP, then learn from it.
- * The check for matching an adj-fib, is to prevent hosts
- * from spamming us with gratuitous ARPS that might otherwise
- * blow our ARP cache
- */
- if (arp0->ip4_over_ethernet[0].ip4.as_u32 ==
- arp0->ip4_over_ethernet[1].ip4.as_u32)
- error0 = arp_learn (vnm, am, sw_if_index0,
- &arp0->ip4_over_ethernet[0]);
- goto drop;
- case ARP_DST_FIB_CONN:
- /* destination is connected, continue to process */
- break;
- case ARP_DST_FIB_NONE:
- /* destination is not connected, stop here */
- error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local;
- goto next_feature;
- }
-
- dst_is_local0 = (FIB_ENTRY_FLAG_LOCAL & dst_flags);
- pfx0 = fib_entry_get_prefix (dst_fei);
- if_addr0 = &pfx0->fp_addr.ip4;
-
- is_vrrp_reply0 =
- ((arp0->opcode ==
- clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply))
- &&
- (!memcmp
- (arp0->ip4_over_ethernet[0].mac.bytes, vrrp_prefix,
- sizeof (vrrp_prefix))));
-
- /* Trash ARP packets whose ARP-level source addresses do not
- match their L2-frame-level source addresses, unless it's
- a reply from a VRRP virtual router */
- if (!ethernet_mac_address_equal
- (eth_rx->src_address,
- arp0->ip4_over_ethernet[0].mac.bytes) && !is_vrrp_reply0)
- {
- error0 = ETHERNET_ARP_ERROR_l2_address_mismatch;
- goto drop;
- }
-
- /* Learn or update sender's mapping only for replies to addresses
- * that are local to the subnet */
- if (arp0->opcode ==
- clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply))
- {
- if (dst_is_local0)
- error0 = arp_learn (vnm, am, sw_if_index0,
- &arp0->ip4_over_ethernet[0]);
- else
- /* a reply for a non-local destination could be a GARP.
- * GARPs for hosts we know were handled above, so this one
- * we drop */
- error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local;
-
- goto next_feature;
- }
- else if (arp0->opcode ==
- clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request) &&
- (dst_is_local0 == 0))
- {
- goto next_feature;
- }
-
- /* Honor unnumbered interface, if any */
- conn_sw_if_index0 = fib_entry_get_resolving_interface (dst_fei);
- if (sw_if_index0 != conn_sw_if_index0 ||
- sw_if_index0 != fib_entry_get_resolving_interface (src_fei))
- {
- /*
- * The interface the ARP is sent to or was received on is not the
- * interface on which the covering prefix is configured.
- * Maybe this is a case for unnumbered.
- */
- if (!arp_unnumbered (p0, sw_if_index0, conn_sw_if_index0))
- {
- error0 = ETHERNET_ARP_ERROR_unnumbered_mismatch;
- goto drop;
- }
- }
- if (arp0->ip4_over_ethernet[0].ip4.as_u32 ==
- arp0->ip4_over_ethernet[1].ip4.as_u32)
- {
- error0 = ETHERNET_ARP_ERROR_gratuitous_arp;
- goto drop;
- }
-
- next0 = arp_mk_reply (vnm, p0, sw_if_index0,
- if_addr0, arp0, eth_rx);
-
- /* We are going to reply to this request, so, in the absence of
- errors, learn the sender */
- if (!error0)
- error0 = arp_learn (vnm, am, sw_if_index0,
- &arp0->ip4_over_ethernet[1]);
-
- n_replies_sent += 1;
- goto enqueue;
-
- next_feature:
- vnet_feature_next (&next0, p0);
- goto enqueue;
-
- drop:
- p0->error = node->errors[error0];
-
- enqueue:
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
- n_left_to_next, pi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_error_count (vm, node->node_index,
- ETHERNET_ARP_ERROR_replies_sent, n_replies_sent);
-
- return frame->n_vectors;
-}
-
-static uword
-arp_proxy (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- vnet_main_t *vnm = vnet_get_main ();
- u32 n_left_from, next_index, *from, *to_next;
- u32 n_arp_replies_sent = 0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- 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 (ethernet_arp_input_trace_t));
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- 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;
- ethernet_arp_header_t *arp0;
- ethernet_header_t *eth_rx;
- ip4_address_t proxy_src;
- u32 pi0, error0, next0, sw_if_index0, fib_index0;
- u8 is_request0;
- ethernet_proxy_arp_t *pa;
-
- pi0 = from[0];
- to_next[0] = pi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- p0 = vlib_get_buffer (vm, pi0);
- arp0 = vlib_buffer_get_current (p0);
- /* Fill in ethernet header. */
- eth_rx = ethernet_buffer_get_header (p0);
-
- is_request0 = arp0->opcode
- == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request);
-
- error0 = ETHERNET_ARP_ERROR_replies_sent;
- sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
- next0 = ARP_REPLY_NEXT_DROP;
-
- fib_index0 = ip4_fib_table_get_index_for_sw_if_index (sw_if_index0);
- if (~0 == fib_index0)
- {
- error0 = ETHERNET_ARP_ERROR_interface_no_table;
- }
-
- if (0 == error0 && is_request0)
- {
- u32 this_addr = clib_net_to_host_u32
- (arp0->ip4_over_ethernet[1].ip4.as_u32);
-
- vec_foreach (pa, am->proxy_arps)
- {
- u32 lo_addr = clib_net_to_host_u32 (pa->lo_addr.as_u32);
- u32 hi_addr = clib_net_to_host_u32 (pa->hi_addr.as_u32);
-
- /* an ARP request hit in the proxy-arp table? */
- if ((this_addr >= lo_addr && this_addr <= hi_addr) &&
- (fib_index0 == pa->fib_index))
- {
- proxy_src.as_u32 =
- arp0->ip4_over_ethernet[1].ip4.data_u32;
-
- /*
- * change the interface address to the proxied
- */
- n_arp_replies_sent++;
-
- next0 =
- arp_mk_reply (vnm, p0, sw_if_index0, &proxy_src, arp0,
- eth_rx);
- }
- }
- }
- else
- {
- p0->error = node->errors[error0];
- }
-
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
- n_left_to_next, pi0, next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_error_count (vm, node->node_index,
- ETHERNET_ARP_ERROR_replies_sent, n_arp_replies_sent);
-
- return frame->n_vectors;
-}
-
-static char *ethernet_arp_error_strings[] = {
-#define _(sym,string) string,
- foreach_ethernet_arp_error
-#undef _
-};
-
-/* *INDENT-OFF* */
-
-VLIB_REGISTER_NODE (arp_input_node, static) =
-{
- .function = arp_input,
- .name = "arp-input",
- .vector_size = sizeof (u32),
- .n_errors = ETHERNET_ARP_N_ERROR,
- .error_strings = ethernet_arp_error_strings,
- .n_next_nodes = ARP_INPUT_N_NEXT,
- .next_nodes = {
- [ARP_INPUT_NEXT_DROP] = "error-drop",
- [ARP_INPUT_NEXT_DISABLED] = "arp-disabled",
- },
- .format_buffer = format_ethernet_arp_header,
- .format_trace = format_ethernet_arp_input_trace,
-};
-
-VLIB_REGISTER_NODE (arp_disabled_node, static) =
-{
- .function = arp_disabled,
- .name = "arp-disabled",
- .vector_size = sizeof (u32),
- .n_errors = ARP_DISABLED_N_ERROR,
- .error_strings = arp_disabled_error_strings,
- .n_next_nodes = ARP_DISABLED_N_NEXT,
- .next_nodes = {
- [ARP_INPUT_NEXT_DROP] = "error-drop",
- },
- .format_buffer = format_ethernet_arp_header,
- .format_trace = format_ethernet_arp_input_trace,
-};
-
-VLIB_REGISTER_NODE (arp_reply_node, static) =
-{
- .function = arp_reply,
- .name = "arp-reply",
- .vector_size = sizeof (u32),
- .n_errors = ETHERNET_ARP_N_ERROR,
- .error_strings = ethernet_arp_error_strings,
- .n_next_nodes = ARP_REPLY_N_NEXT,
- .next_nodes = {
- [ARP_REPLY_NEXT_DROP] = "error-drop",
- [ARP_REPLY_NEXT_REPLY_TX] = "interface-output",
- },
- .format_buffer = format_ethernet_arp_header,
- .format_trace = format_ethernet_arp_input_trace,
-};
-
-VLIB_REGISTER_NODE (arp_proxy_node, static) =
-{
- .function = arp_proxy,
- .name = "arp-proxy",
- .vector_size = sizeof (u32),
- .n_errors = ETHERNET_ARP_N_ERROR,
- .error_strings = ethernet_arp_error_strings,
- .n_next_nodes = ARP_REPLY_N_NEXT,
- .next_nodes = {
- [ARP_REPLY_NEXT_DROP] = "error-drop",
- [ARP_REPLY_NEXT_REPLY_TX] = "interface-output",
- },
- .format_buffer = format_ethernet_arp_header,
- .format_trace = format_ethernet_arp_input_trace,
-};
-
-/* Built-in ARP rx feature path definition */
-VNET_FEATURE_ARC_INIT (arp_feat, static) =
-{
- .arc_name = "arp",
- .start_nodes = VNET_FEATURES ("arp-input"),
- .last_in_arc = "error-drop",
- .arc_index_ptr = ðernet_arp_main.feature_arc_index,
-};
-
-VNET_FEATURE_INIT (arp_reply_feat_node, static) =
-{
- .arc_name = "arp",
- .node_name = "arp-reply",
- .runs_before = VNET_FEATURES ("arp-disabled"),
-};
-
-VNET_FEATURE_INIT (arp_proxy_feat_node, static) =
-{
- .arc_name = "arp",
- .node_name = "arp-proxy",
- .runs_after = VNET_FEATURES ("arp-reply"),
- .runs_before = VNET_FEATURES ("arp-disabled"),
-};
-
-VNET_FEATURE_INIT (arp_disabled_feat_node, static) =
-{
- .arc_name = "arp",
- .node_name = "arp-disabled",
- .runs_before = VNET_FEATURES ("error-drop"),
-};
-
-VNET_FEATURE_INIT (arp_drop_feat_node, static) =
-{
- .arc_name = "arp",
- .node_name = "error-drop",
- .runs_before = 0, /* last feature */
-};
-
-/* *INDENT-ON* */
-
-static int
-ip4_arp_entry_sort (void *a1, void *a2)
-{
- ethernet_arp_ip4_entry_t *e1 = a1;
- ethernet_arp_ip4_entry_t *e2 = a2;
-
- int cmp;
- vnet_main_t *vnm = vnet_get_main ();
-
- cmp = vnet_sw_interface_compare (vnm, e1->sw_if_index, e2->sw_if_index);
- if (!cmp)
- cmp = ip4_address_compare (&e1->ip4_address, &e2->ip4_address);
- return cmp;
-}
-
-ethernet_arp_ip4_entry_t *
-ip4_neighbors_pool (void)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- return am->ip4_entry_pool;
-}
-
-ethernet_arp_ip4_entry_t *
-ip4_neighbor_entries (u32 sw_if_index)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_ip4_entry_t *n, *ns = 0;
-
- /* *INDENT-OFF* */
- pool_foreach (n, am->ip4_entry_pool, ({
- if (sw_if_index != ~0 && n->sw_if_index != sw_if_index)
- continue;
- vec_add1 (ns, n[0]);
- }));
- /* *INDENT-ON* */
-
- if (ns)
- vec_sort_with_function (ns, ip4_arp_entry_sort);
- return ns;
-}
-
-static clib_error_t *
-show_ip4_arp (vlib_main_t * vm,
- unformat_input_t * input, vlib_cli_command_t * cmd)
-{
- vnet_main_t *vnm = vnet_get_main ();
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_ip4_entry_t *e, *es;
- ethernet_proxy_arp_t *pa;
- clib_error_t *error = 0;
- u32 sw_if_index;
-
- /* Filter entries by interface if given. */
- sw_if_index = ~0;
- (void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
-
- es = ip4_neighbor_entries (sw_if_index);
- if (es)
- {
- vlib_cli_output (vm, "%U", format_ethernet_arp_ip4_entry, vnm, 0);
- vec_foreach (e, es)
- {
- vlib_cli_output (vm, "%U", format_ethernet_arp_ip4_entry, vnm, e);
- }
- vec_free (es);
- }
-
- if (vec_len (am->proxy_arps))
- {
- vlib_cli_output (vm, "Proxy arps enabled for:");
- vec_foreach (pa, am->proxy_arps)
- {
- vlib_cli_output (vm, "Fib_index %d %U - %U ",
- pa->fib_index,
- format_ip4_address, &pa->lo_addr,
- format_ip4_address, &pa->hi_addr);
- }
- }
-
- return error;
-}
-
-/*?
- * Display all the IPv4 ARP entries.
- *
- * @cliexpar
- * Example of how to display the IPv4 ARP table:
- * @cliexstart{show ip arp}
- * Time FIB IP4 Flags Ethernet Interface
- * 346.3028 0 6.1.1.3 de:ad:be:ef:ba:be GigabitEthernet2/0/0
- * 3077.4271 0 6.1.1.4 S de:ad:be:ef:ff:ff GigabitEthernet2/0/0
- * 2998.6409 1 6.2.2.3 de:ad:be:ef:00:01 GigabitEthernet2/0/0
- * Proxy arps enabled for:
- * Fib_index 0 6.0.0.1 - 6.0.0.11
- * @cliexend
- ?*/
-/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (show_ip4_arp_command, static) = {
- .path = "show ip arp",
- .function = show_ip4_arp,
- .short_help = "show ip arp",
-};
-/* *INDENT-ON* */
-
-typedef struct
-{
- pg_edit_t l2_type, l3_type;
- pg_edit_t n_l2_address_bytes, n_l3_address_bytes;
- pg_edit_t opcode;
- struct
- {
- pg_edit_t mac;
- pg_edit_t ip4;
- } ip4_over_ethernet[2];
-} pg_ethernet_arp_header_t;
-
-static inline void
-pg_ethernet_arp_header_init (pg_ethernet_arp_header_t * p)
-{
- /* Initialize fields that are not bit fields in the IP header. */
-#define _(f) pg_edit_init (&p->f, ethernet_arp_header_t, f);
- _(l2_type);
- _(l3_type);
- _(n_l2_address_bytes);
- _(n_l3_address_bytes);
- _(opcode);
- _(ip4_over_ethernet[0].mac);
- _(ip4_over_ethernet[0].ip4);
- _(ip4_over_ethernet[1].mac);
- _(ip4_over_ethernet[1].ip4);
-#undef _
-}
-
-uword
-unformat_pg_arp_header (unformat_input_t * input, va_list * args)
-{
- pg_stream_t *s = va_arg (*args, pg_stream_t *);
- pg_ethernet_arp_header_t *p;
- u32 group_index;
-
- p = pg_create_edit_group (s, sizeof (p[0]), sizeof (ethernet_arp_header_t),
- &group_index);
- pg_ethernet_arp_header_init (p);
-
- /* Defaults. */
- pg_edit_set_fixed (&p->l2_type, ETHERNET_ARP_HARDWARE_TYPE_ethernet);
- pg_edit_set_fixed (&p->l3_type, ETHERNET_TYPE_IP4);
- pg_edit_set_fixed (&p->n_l2_address_bytes, 6);
- pg_edit_set_fixed (&p->n_l3_address_bytes, 4);
-
- if (!unformat (input, "%U: %U/%U -> %U/%U",
- unformat_pg_edit,
- unformat_ethernet_arp_opcode_net_byte_order, &p->opcode,
- unformat_pg_edit,
- unformat_mac_address_t, &p->ip4_over_ethernet[0].mac,
- unformat_pg_edit,
- unformat_ip4_address, &p->ip4_over_ethernet[0].ip4,
- unformat_pg_edit,
- unformat_mac_address_t, &p->ip4_over_ethernet[1].mac,
- unformat_pg_edit,
- unformat_ip4_address, &p->ip4_over_ethernet[1].ip4))
- {
- /* Free up any edits we may have added. */
- pg_free_edit_group (s);
- return 0;
- }
- return 1;
-}
-
-clib_error_t *
-ip4_set_arp_limit (u32 arp_limit)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
-
- am->limit_arp_cache_size = arp_limit;
- return 0;
-}
-
-/**
- * @brief Control Plane hook to remove an ARP entry
- */
-int
-vnet_arp_unset_ip4_over_ethernet (vnet_main_t * vnm,
- u32 sw_if_index,
- const
- ethernet_arp_ip4_over_ethernet_address_t *
- a)
-{
- vnet_arp_set_ip4_over_ethernet_rpc_args_t args = {
- .sw_if_index = sw_if_index,
- .flags = ETHERNET_ARP_ARGS_REMOVE,
- .ip4 = a->ip4,
- .mac = a->mac,
- };
-
- vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback,
- (u8 *) & args, sizeof (args));
- return 0;
-}
-
-/**
- * @brief publish wildcard arp event
- * @param sw_if_index The interface on which the ARP entries are acted
- */
-static int
-vnet_arp_wc_publish (u32 sw_if_index,
- const ethernet_arp_ip4_over_ethernet_address_t * a)
-{
- vnet_arp_set_ip4_over_ethernet_rpc_args_t args = {
- .flags = ETHERNET_ARP_ARGS_WC_PUB,
- .sw_if_index = sw_if_index,
- .ip4 = a->ip4,
- .mac = a->mac,
- };
-
- vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback,
- (u8 *) & args, sizeof (args));
- return 0;
-}
-
-static void
-vnet_arp_wc_publish_internal (vnet_main_t * vnm,
- vnet_arp_set_ip4_over_ethernet_rpc_args_t *
- args)
-{
- vlib_main_t *vm = vlib_get_main ();
- ethernet_arp_main_t *am = ðernet_arp_main;
- uword ni = am->wc_ip4_arp_publisher_node;
- uword et = am->wc_ip4_arp_publisher_et;
-
- if (ni == (uword) ~ 0)
- return;
- wc_arp_report_t *r =
- vlib_process_signal_event_data (vm, ni, et, 1, sizeof *r);
- r->ip.as_u32 = args->ip4.as_u32;
- r->sw_if_index = args->sw_if_index;
- mac_address_copy (&r->mac, &args->mac);
-}
-
-void
-wc_arp_set_publisher_node (uword node_index, uword event_type)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- am->wc_ip4_arp_publisher_node = node_index;
- am->wc_ip4_arp_publisher_et = event_type;
-}
-
-static void
-arp_entry_free (ethernet_arp_interface_t * eai, ethernet_arp_ip4_entry_t * e);
-
-static int
-vnet_arp_flush_ip4_over_ethernet_internal (vnet_main_t * vnm,
- vnet_arp_set_ip4_over_ethernet_rpc_args_t
- * args)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_ip4_entry_t *e;
- ethernet_arp_interface_t *eai;
-
- if (vec_len (am->ethernet_arp_by_sw_if_index) <= args->sw_if_index)
- return 0;
-
- eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index];
-
- e = arp_entry_find (eai, &args->ip4);
-
- if (NULL != e)
- {
- adj_nbr_walk_nh4 (e->sw_if_index,
- &e->ip4_address, arp_mk_incomplete_walk, e);
-
- /*
- * The difference between flush and unset, is that an unset
- * means delete for static and dynamic entries. A flush
- * means delete only for dynamic. Flushing is what the DP
- * does in response to interface events. unset is only done
- * by the control plane.
- */
- if (e->flags & IP_NEIGHBOR_FLAG_STATIC)
- {
- e->flags &= ~IP_NEIGHBOR_FLAG_DYNAMIC;
- }
- else if (e->flags & IP_NEIGHBOR_FLAG_DYNAMIC)
- {
- arp_entry_free (eai, e);
- }
- }
- return (0);
-}
-
-/*
- * arp_add_del_interface_address
- *
- * callback when an interface address is added or deleted
- */
-static void
-arp_enable_disable_interface (ip4_main_t * im,
- uword opaque, u32 sw_if_index, u32 is_enable)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
-
- if (is_enable)
- arp_enable (am, sw_if_index);
- else
- arp_disable (am, sw_if_index);
-}
-
-/*
- * arp_add_del_interface_address
- *
- * callback when an interface address is added or deleted
- */
-static void
-arp_add_del_interface_address (ip4_main_t * im,
- uword opaque,
- u32 sw_if_index,
- ip4_address_t * address,
- u32 address_length,
- u32 if_address_index, u32 is_del)
-{
- /*
- * Flush the ARP cache of all entries covered by the address
- * that is being removed.
- */
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_ip4_entry_t *e;
-
- if (vec_len (am->ethernet_arp_by_sw_if_index) <= sw_if_index)
- return;
-
- if (is_del)
- {
- ethernet_arp_interface_t *eai;
- u32 i, *to_delete = 0;
- hash_pair_t *pair;
-
- eai = &am->ethernet_arp_by_sw_if_index[sw_if_index];
-
- /* *INDENT-OFF* */
- hash_foreach_pair (pair, eai->arp_entries,
- ({
- e = pool_elt_at_index(am->ip4_entry_pool,
- pair->value[0]);
- if (ip4_destination_matches_route (im, &e->ip4_address,
- address, address_length))
- {
- vec_add1 (to_delete, e - am->ip4_entry_pool);
- }
- }));
- /* *INDENT-ON* */
-
- for (i = 0; i < vec_len (to_delete); i++)
- {
- e = pool_elt_at_index (am->ip4_entry_pool, to_delete[i]);
-
- vnet_arp_set_ip4_over_ethernet_rpc_args_t delme = {
- .ip4.as_u32 = e->ip4_address.as_u32,
- .sw_if_index = e->sw_if_index,
- .flags = ETHERNET_ARP_ARGS_FLUSH,
- };
- mac_address_copy (&delme.mac, &e->mac);
-
- vnet_arp_flush_ip4_over_ethernet_internal (vnet_get_main (),
- &delme);
- }
-
- vec_free (to_delete);
- }
-}
-
-static void
-arp_table_bind (ip4_main_t * im,
- uword opaque,
- u32 sw_if_index, u32 new_fib_index, u32 old_fib_index)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_interface_t *eai;
- ethernet_arp_ip4_entry_t *e;
- hash_pair_t *pair;
-
- /*
- * the IP table that the interface is bound to has changed.
- * reinstall all the adj fibs.
- */
-
- if (vec_len (am->ethernet_arp_by_sw_if_index) <= sw_if_index)
- return;
-
- eai = &am->ethernet_arp_by_sw_if_index[sw_if_index];
-
- /* *INDENT-OFF* */
- hash_foreach_pair (pair, eai->arp_entries,
- ({
- e = pool_elt_at_index(am->ip4_entry_pool,
- pair->value[0]);
- /*
- * remove the adj-fib from the old table and add to the new
- */
- arp_adj_fib_remove(e, old_fib_index);
- arp_adj_fib_add(e, new_fib_index);
- }));
- /* *INDENT-ON* */
-
-}
-
-static clib_error_t *
-ethernet_arp_init (vlib_main_t * vm)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ip4_main_t *im = &ip4_main;
- pg_node_t *pn;
-
- ethernet_register_input_type (vm, ETHERNET_TYPE_ARP, arp_input_node.index);
-
- pn = pg_get_node (arp_input_node.index);
- pn->unformat_edit = unformat_pg_arp_header;
-
- am->opcode_by_name = hash_create_string (0, sizeof (uword));
-#define _(o) hash_set_mem (am->opcode_by_name, #o, ETHERNET_ARP_OPCODE_##o);
- foreach_ethernet_arp_opcode;
-#undef _
-
- /* $$$ configurable */
- am->limit_arp_cache_size = 50000;
-
- am->pending_resolutions_by_address = hash_create (0, sizeof (uword));
- am->mac_changes_by_address = hash_create (0, sizeof (uword));
- am->wc_ip4_arp_publisher_node = (uword) ~ 0;
-
- /* don't trace ARP error packets */
- {
- vlib_node_runtime_t *rt =
- vlib_node_get_runtime (vm, arp_input_node.index);
-
-#define _(a,b) \
- vnet_pcap_drop_trace_filter_add_del \
- (rt->errors[ETHERNET_ARP_ERROR_##a], \
- 1 /* is_add */);
- foreach_ethernet_arp_error
-#undef _
- }
-
- ip4_add_del_interface_address_callback_t cb;
- cb.function = arp_add_del_interface_address;
- cb.function_opaque = 0;
- vec_add1 (im->add_del_interface_address_callbacks, cb);
-
- ip4_enable_disable_interface_callback_t cbe;
- cbe.function = arp_enable_disable_interface;
- cbe.function_opaque = 0;
- vec_add1 (im->enable_disable_interface_callbacks, cbe);
-
- ip4_table_bind_callback_t cbt;
- cbt.function = arp_table_bind;
- cbt.function_opaque = 0;
- vec_add1 (im->table_bind_callbacks, cbt);
-
- return 0;
-}
-/* *INDENT-OFF* */
-VLIB_INIT_FUNCTION (ethernet_arp_init) =
-{
- .runs_after = VLIB_INITS("ethernet_init"),
-};
-/* *INDENT-ON* */
-
-static void
-arp_entry_free (ethernet_arp_interface_t * eai, ethernet_arp_ip4_entry_t * e)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
-
- arp_adj_fib_remove
- (e, ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index));
- hash_unset (eai->arp_entries, e->ip4_address.as_u32);
- pool_put (am->ip4_entry_pool, e);
-}
-
-static inline int
-vnet_arp_unset_ip4_over_ethernet_internal (vnet_main_t * vnm,
- vnet_arp_set_ip4_over_ethernet_rpc_args_t
- * args)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_ip4_entry_t *e;
- ethernet_arp_interface_t *eai;
-
- if (vec_len (am->ethernet_arp_by_sw_if_index) <= args->sw_if_index)
- return 0;
-
- eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index];
-
- e = arp_entry_find (eai, &args->ip4);
-
- if (NULL != e)
- {
- adj_nbr_walk_nh4 (e->sw_if_index,
- &e->ip4_address, arp_mk_incomplete_walk, e);
- arp_entry_free (eai, e);
- }
-
- return 0;
-}
-
-
-static int
-vnet_arp_populate_ip4_over_ethernet_internal (vnet_main_t * vnm,
- vnet_arp_set_ip4_over_ethernet_rpc_args_t
- * args)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_ip4_entry_t *e;
- ethernet_arp_interface_t *eai;
-
- arp_enable (am, args->sw_if_index);
- eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index];
-
- e = arp_entry_find (eai, &args->ip4);
-
- if (NULL != e)
- {
- adj_nbr_walk_nh4 (e->sw_if_index,
- &e->ip4_address, arp_mk_complete_walk, e);
- }
- return (0);
-}
-
-static void
-set_ip4_over_ethernet_rpc_callback (vnet_arp_set_ip4_over_ethernet_rpc_args_t
- * a)
-{
- vnet_main_t *vm = vnet_get_main ();
- ASSERT (vlib_get_thread_index () == 0);
-
- if (a->flags & ETHERNET_ARP_ARGS_REMOVE)
- vnet_arp_unset_ip4_over_ethernet_internal (vm, a);
- else if (a->flags & ETHERNET_ARP_ARGS_FLUSH)
- vnet_arp_flush_ip4_over_ethernet_internal (vm, a);
- else if (a->flags & ETHERNET_ARP_ARGS_POPULATE)
- vnet_arp_populate_ip4_over_ethernet_internal (vm, a);
- else if (a->flags & ETHERNET_ARP_ARGS_WC_PUB)
- vnet_arp_wc_publish_internal (vm, a);
- else
- vnet_arp_set_ip4_over_ethernet_internal (vm, a);
-}
-
-/**
- * @brief Invoked when the interface's admin state changes
- */
-static clib_error_t *
-ethernet_arp_sw_interface_up_down (vnet_main_t * vnm,
- u32 sw_if_index, u32 flags)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_ip4_entry_t *e;
- u32 i, *to_update = 0;
-
- /* *INDENT-OFF* */
- pool_foreach (e, am->ip4_entry_pool,
- ({
- if (e->sw_if_index == sw_if_index)
- vec_add1 (to_update,
- e - am->ip4_entry_pool);
- }));
- /* *INDENT-ON* */
-
- for (i = 0; i < vec_len (to_update); i++)
- {
- e = pool_elt_at_index (am->ip4_entry_pool, to_update[i]);
-
- vnet_arp_set_ip4_over_ethernet_rpc_args_t update_me = {
- .ip4.as_u32 = e->ip4_address.as_u32,
- .sw_if_index = e->sw_if_index,
- };
- mac_address_copy (&update_me.mac, &e->mac);
-
- if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
- {
- update_me.flags = ETHERNET_ARP_ARGS_POPULATE;
- vnet_arp_populate_ip4_over_ethernet_internal (vnm, &update_me);
- }
- else
- {
- update_me.flags = ETHERNET_ARP_ARGS_FLUSH;
- vnet_arp_flush_ip4_over_ethernet_internal (vnm, &update_me);
- }
- }
- vec_free (to_update);
-
- return 0;
-}
-
-VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_arp_sw_interface_up_down);
-
-static void
-increment_ip4_and_mac_address (ethernet_arp_ip4_over_ethernet_address_t * a)
-{
- u8 old;
- int i;
-
- for (i = 3; i >= 0; i--)
- {
- old = a->ip4.as_u8[i];
- a->ip4.as_u8[i] += 1;
- if (old < a->ip4.as_u8[i])
- break;
- }
-
- for (i = 5; i >= 0; i--)
- {
- old = a->mac.bytes[i];
- a->mac.bytes[i] += 1;
- if (old < a->mac.bytes[i])
- break;
- }
-}
-
-int
-vnet_arp_set_ip4_over_ethernet (vnet_main_t * vnm,
- u32 sw_if_index,
- const ethernet_arp_ip4_over_ethernet_address_t
- * a, ip_neighbor_flags_t flags)
-{
- vnet_arp_set_ip4_over_ethernet_rpc_args_t args = {
- .sw_if_index = sw_if_index,
- .nbr_flags = flags,
- .flags = 0,
- .ip4.as_u32 = a->ip4.as_u32,
- .mac = a->mac,
- };
-
- vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback,
- (u8 *) & args, sizeof (args));
- return 0;
-}
-
-void
-proxy_arp_walk (proxy_arp_walk_t cb, void *data)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_proxy_arp_t *pa;
-
- vec_foreach (pa, am->proxy_arps)
- {
- if (!cb (&pa->lo_addr, &pa->hi_addr, pa->fib_index, data))
- break;
- }
-}
-
-int
-vnet_proxy_arp_enable_disable (vnet_main_t * vnm, u32 sw_if_index, u8 enable)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_interface_t *eai;
-
- vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index);
-
- eai = &am->ethernet_arp_by_sw_if_index[sw_if_index];
-
- if (enable)
- {
- if (!eai->proxy_enabled)
- {
- vnet_feature_enable_disable ("arp", "arp-proxy",
- sw_if_index, 1, NULL, 0);
- }
- eai->proxy_enabled = 1;
- }
- else
- {
- if (eai->proxy_enabled)
- {
- vnet_feature_enable_disable ("arp", "arp-proxy",
- sw_if_index, 0, NULL, 0);
- }
- eai->proxy_enabled = 0;
- }
-
- return (0);
-}
-
-int
-vnet_proxy_arp_add_del (ip4_address_t * lo_addr,
- ip4_address_t * hi_addr, u32 fib_index, int is_del)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_proxy_arp_t *pa;
- u32 found_at_index = ~0;
-
- vec_foreach (pa, am->proxy_arps)
- {
- if (pa->lo_addr.as_u32 == lo_addr->as_u32 &&
- pa->hi_addr.as_u32 == hi_addr->as_u32 && pa->fib_index == fib_index)
- {
- found_at_index = pa - am->proxy_arps;
- break;
- }
- }
-
- if (found_at_index != ~0)
- {
- /* Delete, otherwise it's already in the table */
- if (is_del)
- vec_delete (am->proxy_arps, 1, found_at_index);
- return 0;
- }
- /* delete, no such entry */
- if (is_del)
- return VNET_API_ERROR_NO_SUCH_ENTRY;
-
- /* add, not in table */
- vec_add2 (am->proxy_arps, pa, 1);
- pa->lo_addr.as_u32 = lo_addr->as_u32;
- pa->hi_addr.as_u32 = hi_addr->as_u32;
- pa->fib_index = fib_index;
- return 0;
-}
-
-void
-proxy_arp_intfc_walk (proxy_arp_intf_walk_t cb, void *data)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_interface_t *eai;
-
- vec_foreach (eai, am->ethernet_arp_by_sw_if_index)
- {
- if (eai->proxy_enabled)
- cb (eai - am->ethernet_arp_by_sw_if_index, data);
- }
-}
-
-static clib_error_t *
-ip_arp_add_del_command_fn (vlib_main_t * vm,
- unformat_input_t * input, vlib_cli_command_t * cmd)
-{
- vnet_main_t *vnm = vnet_get_main ();
- u32 sw_if_index;
- ethernet_arp_ip4_over_ethernet_address_t lo_addr, hi_addr, addr;
- int addr_valid = 0;
- int is_del = 0;
- int count = 1;
- u32 fib_index = 0;
- u32 fib_id;
- int is_proxy = 0;
- ip_neighbor_flags_t flags;
-
- flags = IP_NEIGHBOR_FLAG_NONE;
-
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- /* set ip arp TenGigE1/1/0/1 1.2.3.4 aa:bb:... or aabb.ccdd... */
- if (unformat (input, "%U %U %U",
- unformat_vnet_sw_interface, vnm, &sw_if_index,
- unformat_ip4_address, &addr.ip4,
- unformat_mac_address_t, &addr.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 if (unformat (input, "count %d", &count))
- ;
-
- else if (unformat (input, "fib-id %d", &fib_id))
- {
- fib_index = fib_table_find (FIB_PROTOCOL_IP4, fib_id);
-
- if (~0 == fib_index)
- return clib_error_return (0, "fib ID %d doesn't exist\n", fib_id);
- }
-
- else if (unformat (input, "proxy %U - %U",
- unformat_ip4_address, &lo_addr.ip4,
- unformat_ip4_address, &hi_addr.ip4))
- is_proxy = 1;
- else
- break;
- }
-
- if (is_proxy)
- {
- (void) vnet_proxy_arp_add_del (&lo_addr.ip4, &hi_addr.ip4,
- fib_index, is_del);
- return 0;
- }
-
- if (addr_valid)
- {
- int i;
-
- for (i = 0; i < count; i++)
- {
- if (is_del == 0)
- {
- uword event_type, *event_data = 0;
-
- /* Park the debug CLI until the arp entry is installed */
- vnet_register_ip4_arp_resolution_event
- (vnm, &addr.ip4, vlib_current_process (vm),
- 1 /* type */ , 0 /* data */ );
-
- vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index, &addr, flags);
-
- vlib_process_wait_for_event (vm);
- event_type = vlib_process_get_events (vm, &event_data);
- vec_reset_length (event_data);
- if (event_type != 1)
- clib_warning ("event type %d unexpected", event_type);
- }
- else
- vnet_arp_unset_ip4_over_ethernet (vnm, sw_if_index, &addr);
-
- increment_ip4_and_mac_address (&addr);
- }
- }
- else
- {
- return clib_error_return (0, "unknown input `%U'",
- format_unformat_error, input);
- }
-
- return 0;
-}
-
-/* *INDENT-OFF* */
-/*?
- * Add or delete IPv4 ARP cache entries.
- *
- * @note 'set ip arp' options (e.g. delete, static, 'fib-id <id>',
- * 'count <number>', 'interface ip4_addr mac_addr') can be added in
- * any order and combination.
- *
- * @cliexpar
- * @parblock
- * Add or delete IPv4 ARP cache entries as follows. MAC Address can be in
- * either aa:bb:cc:dd:ee:ff format or aabb.ccdd.eeff format.
- * @cliexcmd{set ip arp GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
- * @cliexcmd{set ip arp delete GigabitEthernet2/0/0 6.0.0.3 de:ad:be:ef:ba:be}
- *
- * To add or delete an IPv4 ARP cache entry to or from a specific fib
- * table:
- * @cliexcmd{set ip arp fib-id 1 GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
- * @cliexcmd{set ip arp fib-id 1 delete GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
- *
- * Add or delete IPv4 static ARP cache entries as follows:
- * @cliexcmd{set ip arp static GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
- * @cliexcmd{set ip arp static delete GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
- *
- * For testing / debugging purposes, the 'set ip arp' command can add or
- * delete multiple entries. Supply the 'count N' parameter:
- * @cliexcmd{set ip arp count 10 GigabitEthernet2/0/0 6.0.0.3 dead.beef.babe}
- * @endparblock
- ?*/
-VLIB_CLI_COMMAND (ip_arp_add_del_command, static) = {
- .path = "set ip arp",
- .short_help =
- "set ip arp [del] <intfc> <ip-address> <mac-address> [static] [no-fib-entry] [count <count>] [fib-id <fib-id>] [proxy <lo-addr> - <hi-addr>]",
- .function = ip_arp_add_del_command_fn,
-};
-/* *INDENT-ON* */
-
-static clib_error_t *
-set_int_proxy_arp_command_fn (vlib_main_t * vm,
- unformat_input_t *
- input, vlib_cli_command_t * cmd)
-{
- vnet_main_t *vnm = vnet_get_main ();
- u32 sw_if_index;
- int enable = 0;
-
- sw_if_index = ~0;
-
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
- {
- if (unformat (input, "%U", unformat_vnet_sw_interface,
- vnm, &sw_if_index))
- ;
- else if (unformat (input, "enable") || unformat (input, "on"))
- enable = 1;
- else if (unformat (input, "disable") || unformat (input, "off"))
- enable = 0;
- else
- break;
- }
-
- if (~0 == sw_if_index)
- return clib_error_return (0, "unknown input '%U'",
- format_unformat_error, input);
-
- vnet_proxy_arp_enable_disable (vnm, sw_if_index, enable);
-
- return 0;
-}
-
-/* *INDENT-OFF* */
-/*?
- * Enable proxy-arp on an interface. The vpp stack will answer ARP
- * requests for the indicated address range. Multiple proxy-arp
- * ranges may be provisioned.
- *
- * @note Proxy ARP as a technology is infamous for blackholing traffic.
- * Also, the underlying implementation has not been performance-tuned.
- * Avoid creating an unnecessarily large set of ranges.
- *
- * @cliexpar
- * To enable proxy arp on a range of addresses, use:
- * @cliexcmd{set ip arp proxy 6.0.0.1 - 6.0.0.11}
- * Append 'del' to delete a range of proxy ARP addresses:
- * @cliexcmd{set ip arp proxy 6.0.0.1 - 6.0.0.11 del}
- * You must then specifically enable proxy arp on individual interfaces:
- * @cliexcmd{set interface proxy-arp GigabitEthernet0/8/0 enable}
- * To disable proxy arp on an individual interface:
- * @cliexcmd{set interface proxy-arp GigabitEthernet0/8/0 disable}
- ?*/
-VLIB_CLI_COMMAND (set_int_proxy_enable_command, static) = {
- .path = "set interface proxy-arp",
- .short_help =
- "set interface proxy-arp <intfc> [enable|disable]",
- .function = set_int_proxy_arp_command_fn,
-};
-/* *INDENT-ON* */
-
-
-/*
- * ARP/ND Termination in a L2 Bridge Domain based on IP4/IP6 to MAC
- * hash tables mac_by_ip4 and mac_by_ip6 for each BD.
- */
-typedef enum
-{
- ARP_TERM_NEXT_L2_OUTPUT,
- ARP_TERM_NEXT_DROP,
- ARP_TERM_N_NEXT,
-} arp_term_next_t;
-
-u32 arp_term_next_node_index[32];
-
-static uword
-arp_term_l2bd (vlib_main_t * vm,
- vlib_node_runtime_t * node, vlib_frame_t * frame)
-{
- l2input_main_t *l2im = &l2input_main;
- u32 n_left_from, next_index, *from, *to_next;
- u32 n_replies_sent = 0;
- u16 last_bd_index = ~0;
- l2_bridge_domain_t *last_bd_config = 0;
- l2_input_config_t *cfg0;
-
- from = vlib_frame_vector_args (frame);
- n_left_from = frame->n_vectors;
- next_index = node->cached_next_index;
-
- while (n_left_from > 0)
- {
- u32 n_left_to_next;
-
- 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;
- ethernet_header_t *eth0;
- ethernet_arp_header_t *arp0;
- ip6_header_t *iph0;
- u8 *l3h0;
- u32 pi0, error0, next0, sw_if_index0;
- u16 ethertype0;
- u16 bd_index0;
- u32 ip0;
- u8 *macp0;
-
- pi0 = from[0];
- to_next[0] = pi0;
- from += 1;
- to_next += 1;
- n_left_from -= 1;
- n_left_to_next -= 1;
-
- p0 = vlib_get_buffer (vm, pi0);
- // Terminate only local (SHG == 0) ARP
- if (vnet_buffer (p0)->l2.shg != 0)
- goto next_l2_feature;
-
- eth0 = vlib_buffer_get_current (p0);
- l3h0 = (u8 *) eth0 + vnet_buffer (p0)->l2.l2_len;
- ethertype0 = clib_net_to_host_u16 (*(u16 *) (l3h0 - 2));
- arp0 = (ethernet_arp_header_t *) l3h0;
-
- if (ethertype0 != ETHERNET_TYPE_ARP)
- goto check_ip6_nd;
-
- if ((arp0->opcode !=
- clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request)) &&
- (arp0->opcode !=
- clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)))
- goto check_ip6_nd;
-
- /* Must be ARP request/reply packet here */
- if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
- (p0->flags & VLIB_BUFFER_IS_TRACED)))
- {
- u8 *t0 = vlib_add_trace (vm, node, p0,
- sizeof (ethernet_arp_input_trace_t));
- clib_memcpy_fast (t0, l3h0,
- sizeof (ethernet_arp_input_trace_t));
- }
-
- error0 = 0;
- error0 =
- (arp0->l2_type !=
- clib_net_to_host_u16 (ETHERNET_ARP_HARDWARE_TYPE_ethernet)
- ? ETHERNET_ARP_ERROR_l2_type_not_ethernet : error0);
- error0 =
- (arp0->l3_type !=
- clib_net_to_host_u16 (ETHERNET_TYPE_IP4) ?
- ETHERNET_ARP_ERROR_l3_type_not_ip4 : error0);
-
- sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
-
- if (error0)
- goto drop;
-
- /* Trash ARP packets whose ARP-level source addresses do not
- match, or if requester address is mcast */
- if (PREDICT_FALSE
- (!ethernet_mac_address_equal (eth0->src_address,
- arp0->ip4_over_ethernet[0].
- mac.bytes))
- || ethernet_address_cast (arp0->ip4_over_ethernet[0].mac.bytes))
- {
- /* VRRP virtual MAC may be different to SMAC in ARP reply */
- if (!ethernet_mac_address_equal
- (arp0->ip4_over_ethernet[0].mac.bytes, vrrp_prefix))
- {
- error0 = ETHERNET_ARP_ERROR_l2_address_mismatch;
- goto drop;
- }
- }
- if (PREDICT_FALSE
- (ip4_address_is_multicast (&arp0->ip4_over_ethernet[0].ip4)))
- {
- error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local;
- goto drop;
- }
-
- /* Check if anyone want ARP request events for L2 BDs */
- {
- ethernet_arp_main_t *am = ðernet_arp_main;
- if (am->wc_ip4_arp_publisher_node != (uword) ~ 0)
- vnet_arp_wc_publish (sw_if_index0, &arp0->ip4_over_ethernet[0]);
- }
-
- /* lookup BD mac_by_ip4 hash table for MAC entry */
- ip0 = arp0->ip4_over_ethernet[1].ip4.as_u32;
- bd_index0 = vnet_buffer (p0)->l2.bd_index;
- if (PREDICT_FALSE ((bd_index0 != last_bd_index)
- || (last_bd_index == (u16) ~ 0)))
- {
- last_bd_index = bd_index0;
- last_bd_config = vec_elt_at_index (l2im->bd_configs, bd_index0);
- }
- macp0 = (u8 *) hash_get (last_bd_config->mac_by_ip4, ip0);
-
- if (PREDICT_FALSE (!macp0))
- goto next_l2_feature; /* MAC not found */
- if (PREDICT_FALSE (arp0->ip4_over_ethernet[0].ip4.as_u32 ==
- arp0->ip4_over_ethernet[1].ip4.as_u32))
- goto next_l2_feature; /* GARP */
-
- /* MAC found, send ARP reply -
- Convert ARP request packet to ARP reply */
- arp0->opcode = clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply);
- arp0->ip4_over_ethernet[1] = arp0->ip4_over_ethernet[0];
- arp0->ip4_over_ethernet[0].ip4.as_u32 = ip0;
- mac_address_from_bytes (&arp0->ip4_over_ethernet[0].mac, macp0);
- clib_memcpy_fast (eth0->dst_address, eth0->src_address, 6);
- clib_memcpy_fast (eth0->src_address, macp0, 6);
- n_replies_sent += 1;
-
- output_response:
- /* For BVI, need to use l2-fwd node to send ARP reply as
- l2-output node cannot output packet to BVI properly */
- cfg0 = vec_elt_at_index (l2im->configs, sw_if_index0);
- if (PREDICT_FALSE (cfg0->bvi))
- {
- vnet_buffer (p0)->l2.feature_bitmap |= L2INPUT_FEAT_FWD;
- vnet_buffer (p0)->sw_if_index[VLIB_RX] = 0;
- goto next_l2_feature;
- }
-
- /* Send ARP/ND reply back out input interface through l2-output */
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
- next0 = ARP_TERM_NEXT_L2_OUTPUT;
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next, pi0,
- next0);
- continue;
-
- check_ip6_nd:
- /* IP6 ND event notification or solicitation handling to generate
- local response instead of flooding */
- iph0 = (ip6_header_t *) l3h0;
- if (PREDICT_FALSE (ethertype0 == ETHERNET_TYPE_IP6 &&
- iph0->protocol == IP_PROTOCOL_ICMP6 &&
- !ip6_address_is_unspecified
- (&iph0->src_address)))
- {
- sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
- if (vnet_ip6_nd_term
- (vm, node, p0, eth0, iph0, sw_if_index0,
- vnet_buffer (p0)->l2.bd_index))
- goto output_response;
- }
-
- next_l2_feature:
- {
- next0 = vnet_l2_feature_next (p0, arp_term_next_node_index,
- L2INPUT_FEAT_ARP_TERM);
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next,
- pi0, next0);
- continue;
- }
-
- drop:
- if (0 == arp0->ip4_over_ethernet[0].ip4.as_u32 ||
- (arp0->ip4_over_ethernet[0].ip4.as_u32 ==
- arp0->ip4_over_ethernet[1].ip4.as_u32))
- {
- error0 = ETHERNET_ARP_ERROR_gratuitous_arp;
- }
- next0 = ARP_TERM_NEXT_DROP;
- p0->error = node->errors[error0];
-
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
- to_next, n_left_to_next, pi0,
- next0);
- }
-
- vlib_put_next_frame (vm, node, next_index, n_left_to_next);
- }
-
- vlib_error_count (vm, node->node_index,
- ETHERNET_ARP_ERROR_replies_sent, n_replies_sent);
- return frame->n_vectors;
-}
-
-/* *INDENT-OFF* */
-VLIB_REGISTER_NODE (arp_term_l2bd_node, static) = {
- .function = arp_term_l2bd,
- .name = "arp-term-l2bd",
- .vector_size = sizeof (u32),
- .n_errors = ETHERNET_ARP_N_ERROR,
- .error_strings = ethernet_arp_error_strings,
- .n_next_nodes = ARP_TERM_N_NEXT,
- .next_nodes = {
- [ARP_TERM_NEXT_L2_OUTPUT] = "l2-output",
- [ARP_TERM_NEXT_DROP] = "error-drop",
- },
- .format_buffer = format_ethernet_arp_header,
- .format_trace = format_arp_term_input_trace,
-};
-/* *INDENT-ON* */
-
-clib_error_t *
-arp_term_init (vlib_main_t * vm)
-{
- // Initialize the feature next-node indexes
- feat_bitmap_init_next_nodes (vm,
- arp_term_l2bd_node.index,
- L2INPUT_N_FEAT,
- l2input_get_feat_names (),
- arp_term_next_node_index);
- return 0;
-}
-
-VLIB_INIT_FUNCTION (arp_term_init);
-
-void
-change_arp_mac (u32 sw_if_index, ethernet_arp_ip4_entry_t * e)
-{
- if (e->sw_if_index == sw_if_index)
- {
- adj_nbr_walk_nh4 (e->sw_if_index,
- &e->ip4_address, arp_mk_complete_walk, e);
- }
-}
-
-void
-ethernet_arp_change_mac (u32 sw_if_index)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_arp_ip4_entry_t *e;
- adj_index_t ai;
-
- /* *INDENT-OFF* */
- pool_foreach (e, am->ip4_entry_pool,
- ({
- change_arp_mac (sw_if_index, e);
- }));
- /* *INDENT-ON* */
-
- ai = adj_glean_get (FIB_PROTOCOL_IP4, sw_if_index);
-
- if (ADJ_INDEX_INVALID != ai)
- adj_glean_update_rewrite (ai);
-}
-
-void
-send_ip4_garp (vlib_main_t * vm, u32 sw_if_index)
-{
- ip4_main_t *i4m = &ip4_main;
- ip4_address_t *ip4_addr = ip4_interface_first_address (i4m, sw_if_index, 0);
-
- send_ip4_garp_w_addr (vm, ip4_addr, sw_if_index);
-}
-
-void
-send_ip4_garp_w_addr (vlib_main_t * vm,
- const ip4_address_t * ip4_addr, u32 sw_if_index)
-{
- ip4_main_t *i4m = &ip4_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);
-
- if (ip4_addr)
- {
- clib_warning ("Sending GARP for IP4 address %U on sw_if_idex %d",
- format_ip4_address, ip4_addr, sw_if_index);
-
- /* Form GARP packet for output - Gratuitous ARP is an ARP request packet
- where the interface IP/MAC pair is used for both source and request
- MAC/IP pairs in the request */
- u32 bi = 0;
- ethernet_arp_header_t *h = vlib_packet_template_get_packet
- (vm, &i4m->ip4_arp_request_packet_template, &bi);
-
- if (!h)
- return;
-
- mac_address_from_bytes (&h->ip4_over_ethernet[0].mac, hi->hw_address);
- mac_address_from_bytes (&h->ip4_over_ethernet[1].mac, hi->hw_address);
- h->ip4_over_ethernet[0].ip4 = ip4_addr[0];
- h->ip4_over_ethernet[1].ip4 = ip4_addr[0];
-
- /* Setup MAC header with ARP Etype and broadcast DMAC */
- vlib_buffer_t *b = vlib_get_buffer (vm, bi);
- rewrite =
- ethernet_build_rewrite (vnm, sw_if_index, VNET_LINK_ARP,
- VNET_REWRITE_FOR_SW_INTERFACE_ADDRESS_BROADCAST);
- rewrite_len = vec_len (rewrite);
- vlib_buffer_advance (b, -rewrite_len);
- ethernet_header_t *e = vlib_buffer_get_current (b);
- clib_memcpy_fast (e->dst_address, rewrite, rewrite_len);
- vec_free (rewrite);
-
- /* Send GARP 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);
- }
-}
-
-/*
- * Remove any arp entries associated with the specified interface
- */
-static clib_error_t *
-vnet_arp_delete_sw_interface (vnet_main_t * vnm, u32 sw_if_index, u32 is_add)
-{
- ethernet_arp_main_t *am = ðernet_arp_main;
-
- if (!is_add && sw_if_index != ~0)
- {
- ethernet_arp_ip4_entry_t *e;
- /* *INDENT-OFF* */
- pool_foreach (e, am->ip4_entry_pool, ({
- if (e->sw_if_index != sw_if_index)
- continue;
- vnet_arp_set_ip4_over_ethernet_rpc_args_t args = {
- .sw_if_index = sw_if_index,
- .ip4 = e->ip4_address,
- };
- vnet_arp_unset_ip4_over_ethernet_internal (vnm, &args);
- }));
- /* *INDENT-ON* */
- arp_disable (am, sw_if_index);
- }
- else if (is_add)
- {
- vnet_feature_enable_disable ("arp", "arp-disabled",
- sw_if_index, 1, NULL, 0);
- }
-
- return (NULL);
-}
-
-VNET_SW_INTERFACE_ADD_DEL_FUNCTION (vnet_arp_delete_sw_interface);
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vnet/ethernet/arp.h b/src/vnet/ethernet/arp.h
deleted file mode 100644
index de92c4f..0000000
--- a/src/vnet/ethernet/arp.h
+++ /dev/null
@@ -1,123 +0,0 @@
-/*
- * Copyright (c) 2015 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.
- */
-
-#ifndef __ARP_H__
-#define __ARP_H__
-
-#include <vnet/ethernet/ethernet.h>
-#include <vnet/ethernet/arp_packet.h>
-#include <vnet/ip/ip.h>
-#include <vnet/ip/ip_neighbor.h>
-
-typedef struct
-{
- u32 sw_if_index;
- ip4_address_t ip4_address;
-
- mac_address_t mac;
-
- ip_neighbor_flags_t flags;
-
- f64 time_last_updated;
-
- /**
- * The index of the adj-fib entry created
- */
- fib_node_index_t fib_entry_index;
-} ethernet_arp_ip4_entry_t;
-
-extern u8 *format_ethernet_arp_ip4_entry (u8 * s, va_list * va);
-
-ethernet_arp_ip4_entry_t *ip4_neighbors_pool (void);
-ethernet_arp_ip4_entry_t *ip4_neighbor_entries (u32 sw_if_index);
-
-extern int vnet_proxy_arp_add_del (ip4_address_t * lo_addr,
- ip4_address_t * hi_addr,
- u32 fib_index, int is_del);
-
-extern int vnet_proxy_arp_enable_disable (vnet_main_t * vnm,
- u32 sw_if_index, u8 enable);
-
-extern int vnet_arp_set_ip4_over_ethernet (vnet_main_t * vnm,
- u32 sw_if_index,
- const
- ethernet_arp_ip4_over_ethernet_address_t
- * a, ip_neighbor_flags_t flags);
-
-extern int vnet_arp_unset_ip4_over_ethernet (vnet_main_t * vnm,
- u32 sw_if_index,
- const
- ethernet_arp_ip4_over_ethernet_address_t
- * a);
-
-void vnet_register_ip4_arp_resolution_event (vnet_main_t * vnm,
- void *address_arg,
- uword node_index,
- uword type_opaque, uword data);
-
-typedef int (*arp_change_event_cb_t) (u32 pool_index,
- const mac_address_t * mac,
- u32 sw_if_index,
- const ip4_address_t * address);
-
-int vnet_add_del_ip4_arp_change_event (vnet_main_t * vnm,
- arp_change_event_cb_t data_callback,
- u32 pid,
- void *address_arg,
- uword node_index,
- uword type_opaque,
- uword data, int is_add);
-
-void wc_arp_set_publisher_node (uword inode_index, uword event_type);
-
-void ethernet_arp_change_mac (u32 sw_if_index);
-void ethernet_ndp_change_mac (u32 sw_if_index);
-
-void arp_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai);
-
-typedef struct
-{
- u32 sw_if_index;
- ip4_address_t ip;
- mac_address_t mac;
-} wc_arp_report_t;
-
-/**
- * call back function when walking the DB of proxy ARPs
- * @return 0 to stop the walk !0 to continue
- */
-typedef walk_rc_t (proxy_arp_walk_t) (const ip4_address_t * lo_addr,
- const ip4_address_t * hi_addr,
- u32 fib_index, void *dat);
-
-extern void proxy_arp_walk (proxy_arp_walk_t cb, void *data);
-
-/**
- * call back function when walking the DB of proxy ARP interface
- * @return 0 to stop the walk !0 to continue
- */
-typedef walk_rc_t (proxy_arp_intf_walk_t) (u32 sw_if_index, void *data);
-
-extern void proxy_arp_intfc_walk (proxy_arp_intf_walk_t cb, void *data);
-
-#endif
-
-/*
- * fd.io coding-style-patch-verification: ON
- *
- * Local Variables:
- * eval: (c-set-style "gnu")
- * End:
- */
diff --git a/src/vnet/ethernet/arp_packet.c b/src/vnet/ethernet/arp_packet.c
new file mode 100644
index 0000000..c72dab9
--- /dev/null
+++ b/src/vnet/ethernet/arp_packet.c
@@ -0,0 +1,111 @@
+/*
+ * ethernet/arp.c: IP v4 ARP node
+ *
+ * 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/ethernet/arp_packet.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/ip/format.h>
+
+u8 *
+format_ethernet_arp_opcode (u8 * s, va_list * va)
+{
+ ethernet_arp_opcode_t o = va_arg (*va, ethernet_arp_opcode_t);
+ char *t = 0;
+ switch (o)
+ {
+#define _(f) case ETHERNET_ARP_OPCODE_##f: t = #f; break;
+ foreach_ethernet_arp_opcode;
+#undef _
+
+ default:
+ return format (s, "unknown 0x%x", o);
+ }
+
+ return format (s, "%s", t);
+}
+
+u8 *
+format_ethernet_arp_hardware_type (u8 * s, va_list * va)
+{
+ ethernet_arp_hardware_type_t h = va_arg (*va, ethernet_arp_hardware_type_t);
+ char *t = 0;
+ switch (h)
+ {
+#define _(n,f) case n: t = #f; break;
+ foreach_ethernet_arp_hardware_type;
+#undef _
+
+ default:
+ return format (s, "unknown 0x%x", h);
+ }
+
+ return format (s, "%s", t);
+}
+
+u8 *
+format_ethernet_arp_header (u8 * s, va_list * va)
+{
+ ethernet_arp_header_t *a = va_arg (*va, ethernet_arp_header_t *);
+ u32 max_header_bytes = va_arg (*va, u32);
+ u32 indent;
+ u16 l2_type, l3_type;
+
+ if (max_header_bytes != 0 && sizeof (a[0]) > max_header_bytes)
+ return format (s, "ARP header truncated");
+
+ l2_type = clib_net_to_host_u16 (a->l2_type);
+ l3_type = clib_net_to_host_u16 (a->l3_type);
+
+ indent = format_get_indent (s);
+
+ s = format (s, "%U, type %U/%U, address size %d/%d",
+ format_ethernet_arp_opcode, clib_net_to_host_u16 (a->opcode),
+ format_ethernet_arp_hardware_type, l2_type,
+ format_ethernet_type, l3_type,
+ a->n_l2_address_bytes, a->n_l3_address_bytes);
+
+ if (l2_type == ETHERNET_ARP_HARDWARE_TYPE_ethernet
+ && l3_type == ETHERNET_TYPE_IP4)
+ {
+ s = format (s, "\n%U%U/%U -> %U/%U",
+ format_white_space, indent,
+ format_mac_address_t, &a->ip4_over_ethernet[0].mac,
+ format_ip4_address, &a->ip4_over_ethernet[0].ip4,
+ format_mac_address_t, &a->ip4_over_ethernet[1].mac,
+ format_ip4_address, &a->ip4_over_ethernet[1].ip4);
+ }
+ else
+ {
+ uword n2 = a->n_l2_address_bytes;
+ uword n3 = a->n_l3_address_bytes;
+ s = format (s, "\n%U%U/%U -> %U/%U",
+ format_white_space, indent,
+ format_hex_bytes, a->data + 0 * n2 + 0 * n3, n2,
+ format_hex_bytes, a->data + 1 * n2 + 0 * n3, n3,
+ format_hex_bytes, a->data + 1 * n2 + 1 * n3, n2,
+ format_hex_bytes, a->data + 2 * n2 + 1 * n3, n3);
+ }
+
+ return s;
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
diff --git a/src/vnet/ethernet/arp_packet.h b/src/vnet/ethernet/arp_packet.h
index b4e021c..a35adf1 100644
--- a/src/vnet/ethernet/arp_packet.h
+++ b/src/vnet/ethernet/arp_packet.h
@@ -18,6 +18,7 @@
#ifndef included_ethernet_arp_packet_h
#define included_ethernet_arp_packet_h
+#include <vnet/ip/ip4_packet.h>
#include <vnet/ethernet/mac_address.h>
#define foreach_ethernet_arp_hardware_type \
@@ -145,9 +146,9 @@
};
} ethernet_arp_header_t;
-void send_ip4_garp (vlib_main_t * vm, u32 sw_if_index);
-void send_ip4_garp_w_addr (vlib_main_t * vm,
- const ip4_address_t * ip4_addr, u32 sw_if_index);
+extern u8 *format_ethernet_arp_header (u8 * s, va_list * va);
+extern u8 *format_ethernet_arp_opcode (u8 * s, va_list * va);
+extern u8 *format_ethernet_arp_hardware_type (u8 * s, va_list * va);
#endif /* included_ethernet_arp_packet_h */
diff --git a/src/vnet/ethernet/ethernet.h b/src/vnet/ethernet/ethernet.h
index cde6fb9..2e5209c 100644
--- a/src/vnet/ethernet/ethernet.h
+++ b/src/vnet/ethernet/ethernet.h
@@ -257,8 +257,19 @@
u32 input_next_mpls;
} next_by_ethertype_t;
+struct ethernet_main_t_;
+
+typedef void (ethernet_address_change_function_t)
+ (struct ethernet_main_t_ * im, u32 sw_if_index, uword opaque);
+
typedef struct
{
+ ethernet_address_change_function_t *function;
+ uword function_opaque;
+} ethernet_address_change_ctx_t;
+
+typedef struct ethernet_main_t_
+{
vlib_main_t *vlib_main;
/* next node index for the L3 input node of each ethertype */
@@ -300,6 +311,10 @@
/* Allocated loopback instances */
uword *bm_loopback_instances;
+
+ /** Functions to call when interface hw address changes. */
+ ethernet_address_change_ctx_t *address_change_callbacks;
+
} ethernet_main_t;
extern ethernet_main_t ethernet_main;
@@ -552,8 +567,6 @@
u8 *ethernet_build_rewrite (vnet_main_t * vnm,
u32 sw_if_index,
vnet_link_t link_type, const void *dst_address);
-const u8 *ethernet_ip4_mcast_dst_addr (void);
-const u8 *ethernet_ip6_mcast_dst_addr (void);
void ethernet_input_init (vlib_main_t * vm, ethernet_main_t * em);
extern vlib_node_registration_t ethernet_input_node;
diff --git a/src/vnet/ethernet/interface.c b/src/vnet/ethernet/interface.c
index d796692..39e5cfb 100644
--- a/src/vnet/ethernet/interface.c
+++ b/src/vnet/ethernet/interface.c
@@ -41,10 +41,12 @@
#include <vnet/ip/ip.h>
#include <vnet/pg/pg.h>
#include <vnet/ethernet/ethernet.h>
-#include <vnet/ethernet/arp.h>
+//#include <vnet/ethernet/arp.h>
#include <vnet/l2/l2_input.h>
#include <vnet/l2/l2_bd.h>
#include <vnet/adj/adj.h>
+#include <vnet/adj/adj_mcast.h>
+#include <vnet/ip-neighbor/ip_neighbor.h>
/**
* @file
@@ -53,7 +55,7 @@
* This file contains code to manage loopback interfaces.
*/
-const u8 *
+static const u8 *
ethernet_ip4_mcast_dst_addr (void)
{
const static u8 ethernet_mcast_dst_mac[] = {
@@ -63,7 +65,7 @@
return (ethernet_mcast_dst_mac);
}
-const u8 *
+static const u8 *
ethernet_ip6_mcast_dst_addr (void)
{
const static u8 ethernet_mcast_dst_mac[] = {
@@ -195,27 +197,74 @@
void
ethernet_update_adjacency (vnet_main_t * vnm, u32 sw_if_index, u32 ai)
{
- ip_adjacency_t *adj;
-
- adj = adj_get (ai);
-
vnet_sw_interface_t *si = vnet_get_sw_interface (vnm, sw_if_index);
+
if ((si->type == VNET_SW_INTERFACE_TYPE_P2P) ||
(si->type == VNET_SW_INTERFACE_TYPE_PIPE))
{
default_update_adjacency (vnm, sw_if_index, ai);
}
- else if (FIB_PROTOCOL_IP4 == adj->ia_nh_proto)
- {
- arp_update_adjacency (vnm, sw_if_index, ai);
- }
- else if (FIB_PROTOCOL_IP6 == adj->ia_nh_proto)
- {
- ip6_ethernet_update_adjacency (vnm, sw_if_index, ai);
- }
else
{
- ASSERT (0);
+ ip_adjacency_t *adj;
+
+ adj = adj_get (ai);
+
+ switch (adj->lookup_next_index)
+ {
+ case IP_LOOKUP_NEXT_GLEAN:
+ adj_glean_update_rewrite (ai);
+ break;
+ case IP_LOOKUP_NEXT_ARP:
+ ip_neighbor_update (vnm, ai);
+ break;
+ case IP_LOOKUP_NEXT_BCAST:
+ adj_nbr_update_rewrite (ai,
+ ADJ_NBR_REWRITE_FLAG_COMPLETE,
+ ethernet_build_rewrite
+ (vnm,
+ adj->rewrite_header.sw_if_index,
+ adj->ia_link,
+ 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,
+ (adj->ia_nh_proto == FIB_PROTOCOL_IP6 ?
+ ethernet_ip6_mcast_dst_addr () :
+ ethernet_ip4_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;
+ }
}
}
@@ -234,8 +283,12 @@
clib_memcpy (hi->hw_address, mac_address, vec_len (hi->hw_address));
clib_memcpy (ei->address, (u8 *) mac_address, sizeof (ei->address));
- ethernet_arp_change_mac (hi->sw_if_index);
- ethernet_ndp_change_mac (hi->sw_if_index);
+
+ {
+ ethernet_address_change_ctx_t *cb;
+ vec_foreach (cb, em->address_change_callbacks)
+ cb->function (em, hi->sw_if_index, cb->function_opaque);
+ }
return (NULL);
}
diff --git a/src/vnet/ethernet/mac_address.c b/src/vnet/ethernet/mac_address.c
index 6f40e50..b798129 100644
--- a/src/vnet/ethernet/mac_address.c
+++ b/src/vnet/ethernet/mac_address.c
@@ -61,6 +61,16 @@
return (0);
}
+void
+mac_address_increment (mac_address_t * mac)
+{
+ u64 a;
+
+ a = mac_address_as_u64 (mac);
+ a++;
+ mac_address_from_u64 (mac, a);
+}
+
/*
* fd.io coding-style-patch-verification: ON
*
diff --git a/src/vnet/ethernet/mac_address.h b/src/vnet/ethernet/mac_address.h
index 01fb76e..aa773c5 100644
--- a/src/vnet/ethernet/mac_address.h
+++ b/src/vnet/ethernet/mac_address.h
@@ -149,6 +149,7 @@
mac->u.last_2 = 0;
}
+extern void mac_address_increment (mac_address_t * mac);
extern uword unformat_mac_address_t (unformat_input_t * input,
va_list * args);
extern u8 *format_mac_address_t (u8 * s, va_list * args);