#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>
/* Proxy arp vector */
ethernet_proxy_arp_t *proxy_arps;
+
+ uword wc_ip4_arp_publisher_node;
+ uword wc_ip4_arp_publisher_et;
} ethernet_arp_main_t;
static ethernet_arp_main_t ethernet_arp_main;
#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);
{
ethernet_arp_header_t *a = va_arg (*va, ethernet_arp_header_t *);
u32 max_header_bytes = va_arg (*va, u32);
- uword indent;
+ u32 indent;
u16 l2_type, l3_type;
if (max_header_bytes != 0 && sizeof (a[0]) > max_header_bytes)
if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_NO_FIB_ENTRY)
flags = format (flags, "N");
- s = format (s, "%=12U%=16U%=6s%=20U%=24U",
- format_vlib_cpu_time, vnm->vlib_main, e->cpu_time_last_updated,
+ s = format (s, "%=12U%=16U%=6s%=20U%U",
+ format_vlib_time, vnm->vlib_main, e->time_last_updated,
format_ip4_address, &e->ip4_address,
flags ? (char *) flags : "",
format_ethernet_address, e->ethernet_address,
switch (adj->lookup_next_index)
{
- case IP_LOOKUP_NEXT_ARP:
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,
* 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 MAC desintation address. And we copy 23 bits
- * from the address.
+ * Ofset is 2 bytes into the MAC desintation address.
*/
- adj_mcast_update_rewrite (ai, rewrite, offset, 0x007fffff);
+ adj_mcast_update_rewrite (ai, rewrite, offset);
break;
}
case IP_LOOKUP_NEXT_PUNT:
case IP_LOOKUP_NEXT_LOCAL:
case IP_LOOKUP_NEXT_REWRITE:
- case IP_LOOKUP_NEXT_LOAD_BALANCE:
+ case IP_LOOKUP_NEXT_MCAST_MIDCHAIN:
case IP_LOOKUP_NEXT_MIDCHAIN:
case IP_LOOKUP_NEXT_ICMP_ERROR:
case IP_LOOKUP_N_NEXT:
}
}
-int
+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 int
vnet_arp_set_ip4_over_ethernet_internal (vnet_main_t * vnm,
vnet_arp_set_ip4_over_ethernet_rpc_args_t
* args)
e->sw_if_index = sw_if_index;
e->ip4_address = a->ip4;
+ e->fib_entry_index = FIB_NODE_INDEX_INVALID;
clib_memcpy (e->ethernet_address,
a->ethernet, sizeof (e->ethernet_address));
if (!is_no_fib_entry)
{
- fib_prefix_t pfx = {
- .fp_len = 32,
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_addr.ip4 = a->ip4,
- };
- u32 fib_index;
-
- fib_index =
- ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index);
- e->fib_entry_index =
- fib_table_entry_update_one_path (fib_index, &pfx, FIB_SOURCE_ADJ,
- FIB_ENTRY_FLAG_ATTACHED,
- FIB_PROTOCOL_IP4, &pfx.fp_addr,
- e->sw_if_index, ~0, 1, NULL,
- FIB_ROUTE_PATH_FLAG_NONE);
+ arp_adj_fib_add (e,
+ ip4_fib_table_get_index_for_sw_if_index
+ (e->sw_if_index));
+ }
+ else
+ {
e->flags |= ETHERNET_ARP_IP4_ENTRY_FLAG_NO_FIB_ENTRY;
}
}
*/
if (0 == memcmp (e->ethernet_address,
a->ethernet, sizeof (e->ethernet_address)))
- return -1;
+ {
+ e->time_last_updated = vlib_time_now (vm);
+ goto check_customers;
+ }
/* Update time stamp and ethernet address. */
clib_memcpy (e->ethernet_address, a->ethernet,
sizeof (e->ethernet_address));
}
- e->cpu_time_last_updated = clib_cpu_time_now ();
+ e->time_last_updated = vlib_time_now (vm);
if (is_static)
e->flags |= ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC;
else
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, a->ip4.as_u32);
if (p)
_ (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") \
- _ (missing_interface_address, "ARP missing interface address") \
_ (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") \
static int
arp_unnumbered (vlib_buffer_t * p0,
- u32 pi0, ethernet_header_t * eth0, u32 sw_if_index)
+ u32 input_sw_if_index, u32 conn_sw_if_index)
{
- vlib_main_t *vm = vlib_get_main ();
vnet_main_t *vnm = vnet_get_main ();
vnet_interface_main_t *vim = &vnm->interface_main;
vnet_sw_interface_t *si;
- vnet_hw_interface_t *hi;
- u32 unnum_src_sw_if_index;
- u32 *broadcast_swifs = 0;
- u32 *buffers = 0;
- u32 n_alloc = 0;
- vlib_buffer_t *b0;
- int i;
- u8 dst_mac_address[6];
- i16 header_size;
- ethernet_arp_header_t *arp0;
-
- /* Save the dst mac address */
- clib_memcpy (dst_mac_address, eth0->dst_address, sizeof (dst_mac_address));
- /* Figure out which sw_if_index supplied the address */
- unnum_src_sw_if_index = sw_if_index;
+ /* 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];
- /* Track down all users of the unnumbered source */
- /* *INDENT-OFF* */
- pool_foreach (si, vim->sw_interfaces,
- ({
- if (si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED &&
- (si->unnumbered_sw_if_index == unnum_src_sw_if_index))
- {
- vec_add1 (broadcast_swifs, si->sw_if_index);
- }
- }));
- /* *INDENT-ON* */
-
- /* If there are no interfaces un-unmbered to this interface,
- we are done here. */
- if (0 == vec_len (broadcast_swifs))
- return 0;
-
- /* Allocate buffering if we need it */
- if (vec_len (broadcast_swifs) > 1)
- {
- vec_validate (buffers, vec_len (broadcast_swifs) - 2);
- n_alloc = vlib_buffer_alloc (vm, buffers, vec_len (buffers));
- _vec_len (buffers) = n_alloc;
- for (i = 0; i < n_alloc; i++)
- {
- b0 = vlib_get_buffer (vm, buffers[i]);
-
- /* xerox (partially built) ARP pkt */
- clib_memcpy (b0->data, p0->data,
- p0->current_length + p0->current_data);
- b0->current_data = p0->current_data;
- b0->current_length = p0->current_length;
- vnet_buffer (b0)->sw_if_index[VLIB_RX] =
- vnet_buffer (p0)->sw_if_index[VLIB_RX];
- }
- }
-
- vec_insert (buffers, 1, 0);
- buffers[0] = pi0;
-
- for (i = 0; i < vec_len (buffers); i++)
+ if (!(si->flags & VNET_SW_INTERFACE_FLAG_UNNUMBERED &&
+ (si->unnumbered_sw_if_index == conn_sw_if_index)))
{
- b0 = vlib_get_buffer (vm, buffers[i]);
- arp0 = vlib_buffer_get_current (b0);
-
- hi = vnet_get_sup_hw_interface (vnm, broadcast_swifs[i]);
- si = vnet_get_sw_interface (vnm, broadcast_swifs[i]);
-
- /* For decoration, most likely */
- vnet_buffer (b0)->sw_if_index[VLIB_TX] = hi->sw_if_index;
-
- /* Fix ARP pkt src address */
- clib_memcpy (arp0->ip4_over_ethernet[0].ethernet, hi->hw_address, 6);
-
- /* Build L2 encaps for this swif */
- header_size = sizeof (ethernet_header_t);
- if (si->sub.eth.flags.one_tag)
- header_size += 4;
- else if (si->sub.eth.flags.two_tags)
- header_size += 8;
-
- vlib_buffer_advance (b0, -header_size);
- eth0 = vlib_buffer_get_current (b0);
-
- if (si->sub.eth.flags.one_tag)
- {
- ethernet_vlan_header_t *outer = (void *) (eth0 + 1);
-
- eth0->type = si->sub.eth.flags.dot1ad ?
- clib_host_to_net_u16 (ETHERNET_TYPE_DOT1AD) :
- clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
- outer->priority_cfi_and_id =
- clib_host_to_net_u16 (si->sub.eth.outer_vlan_id);
- outer->type = clib_host_to_net_u16 (ETHERNET_TYPE_ARP);
-
- }
- else if (si->sub.eth.flags.two_tags)
- {
- ethernet_vlan_header_t *outer = (void *) (eth0 + 1);
- ethernet_vlan_header_t *inner = (void *) (outer + 1);
-
- eth0->type = si->sub.eth.flags.dot1ad ?
- clib_host_to_net_u16 (ETHERNET_TYPE_DOT1AD) :
- clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
- outer->priority_cfi_and_id =
- clib_host_to_net_u16 (si->sub.eth.outer_vlan_id);
- outer->type = clib_host_to_net_u16 (ETHERNET_TYPE_VLAN);
- inner->priority_cfi_and_id =
- clib_host_to_net_u16 (si->sub.eth.inner_vlan_id);
- inner->type = clib_host_to_net_u16 (ETHERNET_TYPE_ARP);
-
- }
- else
- {
- eth0->type = clib_host_to_net_u16 (ETHERNET_TYPE_ARP);
- }
-
- /* Restore the original dst address, set src address */
- clib_memcpy (eth0->dst_address, dst_mac_address,
- sizeof (eth0->dst_address));
- clib_memcpy (eth0->src_address, hi->hw_address,
- sizeof (eth0->src_address));
-
- /* Transmit replicas */
- if (i > 0)
- {
- 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] = buffers[i];
- f->n_vectors = 1;
- vlib_put_frame_to_node (vm, hi->output_node_index, f);
- }
+ /* 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;
}
- /* The regular path outputs the original pkt.. */
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = broadcast_swifs[0];
+ return !0;
+}
- vec_free (broadcast_swifs);
- vec_free (buffers);
+static u32
+arp_learn (vnet_main_t * vnm,
+ ethernet_arp_main_t * am, u32 sw_if_index, void *addr)
+{
+ if (am->limit_arp_cache_size &&
+ pool_elts (am->ip4_entry_pool) >= am->limit_arp_cache_size)
+ unset_random_arp_entry ();
- return !0;
+ vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index, addr, 0, 0);
+ return (ETHERNET_ARP_ERROR_l3_src_address_learned);
}
static uword
vlib_buffer_t *p0;
vnet_hw_interface_t *hw_if0;
ethernet_arp_header_t *arp0;
- ethernet_header_t *eth0;
+ ethernet_header_t *eth_rx, *eth_tx;
ip4_address_t *if_addr0, proxy_src;
u32 pi0, error0, next0, sw_if_index0, conn_sw_if_index0, fib_index0;
- u8 is_request0, dst_is_local0, is_unnum0;
+ u8 is_request0, dst_is_local0, is_unnum0, is_vrrp_reply0;
ethernet_proxy_arp_t *pa;
fib_node_index_t dst_fei, src_fei;
fib_prefix_t pfx0;
fib_entry_flag_t src_flags, dst_flags;
+ u8 *rewrite0, rewrite0_len;
pi0 = from[0];
to_next[0] = pi0;
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);
32);
dst_flags = fib_entry_get_flags (dst_fei);
- src_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
- &arp0->ip4_over_ethernet[0].ip4,
- 32);
- src_flags = fib_entry_get_flags (src_fei);
-
conn_sw_if_index0 = fib_entry_get_resolving_interface (dst_fei);
+ /* Honor unnumbered interface, if any */
+ is_unnum0 = sw_if_index0 != conn_sw_if_index0;
+
+ {
+ /*
+ * 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;
+ fib_entry_src_t *src;
+ fib_source_t source;
+ fib_prefix_t pfx;
+ 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 drop1;
+ }
+ /* 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.
+ */
+ fib_entry_get_prefix (src_fei, &pfx);
+ 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 drop2;
+ }
+ }
+
if (!(FIB_ENTRY_FLAG_CONNECTED & dst_flags))
{
error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local;
goto drop1;
}
- /* Honor unnumbered interface, if any */
- is_unnum0 = sw_if_index0 != conn_sw_if_index0;
-
- /* Source must also be local to subnet of matching interface address. */
- if (!((FIB_ENTRY_FLAG_ATTACHED & src_flags) ||
- (FIB_ENTRY_FLAG_CONNECTED & src_flags)))
- {
- /*
- * 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.
- */
- error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local;
- goto drop2;
- }
if (sw_if_index0 != fib_entry_get_resolving_interface (src_fei))
{
/*
* The interface the ARP was received on is not the interface
- * on which the covering prefix is configured. Maybe this is a case
- * for unnumbered.
+ * on which the covering prefix is configured. Maybe this is a
+ * case for unnumbered.
*/
is_unnum0 = 1;
}
- /* Reject requests/replies with our local interface address. */
- if (FIB_ENTRY_FLAG_LOCAL & src_flags)
- {
- error0 = ETHERNET_ARP_ERROR_l3_src_address_is_local;
- goto drop2;
- }
-
dst_is_local0 = (FIB_ENTRY_FLAG_LOCAL & dst_flags);
fib_entry_get_prefix (dst_fei, &pfx0);
if_addr0 = &pfx0.fp_addr.ip4;
- /* Fill in ethernet header. */
- eth0 = ethernet_buffer_get_header (p0);
+ is_vrrp_reply0 =
+ ((arp0->opcode ==
+ clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply))
+ &&
+ (!memcmp
+ (arp0->ip4_over_ethernet[0].ethernet, vrrp_prefix,
+ sizeof (vrrp_prefix))));
/* Trash ARP packets whose ARP-level source addresses do not
- match their L2-frame-level source addresses */
- if (memcmp (eth0->src_address, arp0->ip4_over_ethernet[0].ethernet,
- sizeof (eth0->src_address)))
+ match their L2-frame-level source addresses, unless it's
+ a reply from a VRRP virtual router */
+ if (memcmp
+ (eth_rx->src_address, arp0->ip4_over_ethernet[0].ethernet,
+ sizeof (eth_rx->src_address)) && !is_vrrp_reply0)
{
error0 = ETHERNET_ARP_ERROR_l2_address_mismatch;
goto drop2;
}
- /* Learn or update sender's mapping only for requests or unicasts
- that don't match local interface address. */
- if (ethernet_address_cast (eth0->dst_address) ==
- ETHERNET_ADDRESS_UNICAST || is_request0)
+ /* 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) &&
+ dst_is_local0)
{
- if (am->limit_arp_cache_size &&
- pool_elts (am->ip4_entry_pool) >= am->limit_arp_cache_size)
- unset_random_arp_entry ();
-
- vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index0,
- &arp0->ip4_over_ethernet[0],
- 0 /* is_static */ , 0);
- error0 = ETHERNET_ARP_ERROR_l3_src_address_learned;
+ error0 = arp_learn (vnm, am, sw_if_index0,
+ &arp0->ip4_over_ethernet[0]);
+ goto drop1;
}
-
- /* Only send a reply for requests sent which match a local interface. */
- if (!(is_request0 && dst_is_local0))
+ else if (arp0->opcode ==
+ clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request) &&
+ (dst_is_local0 == 0))
{
- error0 =
- (arp0->opcode ==
- clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply) ?
- ETHERNET_ARP_ERROR_replies_received : error0);
goto drop1;
}
- /* Send a reply. */
send_reply:
+ /* 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);
/* Hardware must be ethernet-like. */
ASSERT (vec_len (hw_if0->hw_address) == 6);
- clib_memcpy (eth0->dst_address, eth0->src_address, 6);
- clib_memcpy (eth0->src_address, 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 (eth_tx, rewrite0, vec_len (rewrite0));
+ vec_free (rewrite0);
- /* Figure out how much to rewind current data from adjacency. */
- /* get the adj from the destination's covering connected */
if (NULL == pa)
{
if (is_unnum0)
{
- if (!arp_unnumbered (p0, pi0, eth0, conn_sw_if_index0))
+ if (!arp_unnumbered (p0, sw_if_index0, conn_sw_if_index0))
goto drop2;
}
- else
- {
- ip_adjacency_t *adj0 = NULL;
- adj_index_t ai;
-
- if (FIB_ENTRY_FLAG_ATTACHED & src_flags)
- {
- /*
- * If the source is attached use the adj from that source.
- */
- ai = fib_entry_get_adj (src_fei);
- if (ADJ_INDEX_INVALID != ai)
- {
- adj0 = adj_get (ai);
- }
- }
- else
- {
- /*
- * Get the glean adj from the cover. This is presumably interface
- * sourced, and therefre needs to be a glean adj.
- */
- ai = fib_entry_get_adj_for_source
- (ip4_fib_table_lookup
- (ip4_fib_get (fib_index0),
- &arp0->ip4_over_ethernet[1].ip4, 31),
- FIB_SOURCE_INTERFACE);
-
- if (ADJ_INDEX_INVALID != ai)
- {
- adj0 = adj_get (ai);
-
- if (adj0->lookup_next_index == IP_LOOKUP_NEXT_GLEAN)
- {
- adj0 = NULL;
- }
- }
- }
- if (NULL != adj0)
- {
- vlib_buffer_advance (p0,
- -adj0->rewrite_header.data_bytes);
- }
- else
- {
- error0 = ETHERNET_ARP_ERROR_missing_interface_address;
- goto drop2;
- }
- }
}
+ /* 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]);
+
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, pi0, next0);
if ((this_addr >= lo_addr && this_addr <= hi_addr) &&
(fib_index0 == pa->fib_index))
{
- eth0 = ethernet_buffer_get_header (p0);
proxy_src.as_u32 =
arp0->ip4_over_ethernet[1].ip4.data_u32;
/*
- * Rewind buffer, direct code above not to
- * think too hard about it.
+ * change the interface address to the proxied
*/
if_addr0 = &proxy_src;
is_unnum0 = 0;
- i32 ethernet_start =
- vnet_buffer (p0)->ethernet.start_of_ethernet_header;
- i32 rewind = p0->current_data - ethernet_start;
- vlib_buffer_advance (p0, -rewind);
n_proxy_arp_replies_sent++;
goto send_reply;
}
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)
{
return 0;
}
+/**
+ * @brief publish wildcard arp event
+ * @param sw_if_index The interface on which the ARP entires are acted
+ */
+static int
+vnet_arp_wc_publish (u32 sw_if_index, void *a_arg)
+{
+ ethernet_arp_ip4_over_ethernet_address_t *a = a_arg;
+ vnet_arp_set_ip4_over_ethernet_rpc_args_t args = {
+ .flags = ETHERNET_ARP_ARGS_WC_PUB,
+ .sw_if_index = sw_if_index,
+ .a = *a
+ };
+
+ 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->ip4 = args->a.ip4.as_u32;
+ r->sw_if_index = args->sw_if_index;
+ memcpy (r->mac, args->a.ethernet, sizeof r->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;
+}
+
/*
* arp_add_del_interface_address
*
}
}
+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 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)
{
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 */
{
cb.function_opaque = 0;
vec_add1 (im->add_del_interface_address_callbacks, cb);
+ ip4_table_bind_callback_t cbt;
+ cbt.function = arp_table_bind;
+ cbt.function_opaque = 0;
+ vec_add1 (im->table_bind_callbacks, cbt);
+
return 0;
}
{
ethernet_arp_main_t *am = ðernet_arp_main;
- /* it's safe to delete the ADJ source on the FIB entry, even if it
- * was added */
- fib_table_entry_delete_index (e->fib_entry_index, FIB_SOURCE_ADJ);
+ 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);
}
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->a.ip4);
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->a.ip4);
* does in response to interface events. unset is only done
* by the control plane.
*/
- if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC)
+ if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC)
+ {
+ e->flags &= ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC;
+ }
+ else if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC)
{
arp_entry_free (eai, e);
}
ethernet_arp_ip4_entry_t *e;
ethernet_arp_interface_t *eai;
+ vec_validate (am->ethernet_arp_by_sw_if_index, args->sw_if_index);
eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index];
e = arp_entry_find (eai, &args->a.ip4);
* a)
{
vnet_main_t *vm = vnet_get_main ();
- ASSERT (os_get_cpu_number () == 0);
+ ASSERT (vlib_get_thread_index () == 0);
if (a->flags & ETHERNET_ARP_ARGS_REMOVE)
vnet_arp_unset_ip4_over_ethernet_internal (vm, a);
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);
}
int
vnet_proxy_arp_fib_reset (u32 fib_id)
{
- ip4_main_t *im = &ip4_main;
ethernet_arp_main_t *am = ðernet_arp_main;
ethernet_proxy_arp_t *pa;
u32 *entries_to_delete = 0;
u32 fib_index;
- uword *p;
int i;
- p = hash_get (im->fib_index_by_table_id, fib_id);
- if (!p)
+ fib_index = fib_table_find (FIB_PROTOCOL_IP4, fib_id);
+ if (~0 == fib_index)
return VNET_API_ERROR_NO_SUCH_ENTRY;
- fib_index = p[0];
vec_foreach (pa, am->proxy_arps)
{
else if (unformat (input, "fib-id %d", &fib_id))
{
- ip4_main_t *im = &ip4_main;
- uword *p = hash_get (im->fib_index_by_table_id, fib_id);
- if (!p)
+ 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);
- fib_index = p[0];
}
else if (unformat (input, "proxy %U - %U",
u16 bd_index0;
u32 ip0;
u8 *macp0;
+ u8 is_vrrp_reply0;
pi0 = from[0];
to_next[0] = pi0;
if (error0)
goto drop;
+ is_vrrp_reply0 =
+ ((arp0->opcode ==
+ clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply))
+ &&
+ (!memcmp
+ (arp0->ip4_over_ethernet[0].ethernet, vrrp_prefix,
+ sizeof (vrrp_prefix))));
+
/* Trash ARP packets whose ARP-level source addresses do not
- match their L2-frame-level source addresses */
+ match their L2-frame-level source addresses, unless it's
+ a reply from a VRRP virtual router */
if (PREDICT_FALSE
- (memcmp
- (eth0->src_address, arp0->ip4_over_ethernet[0].ethernet,
- sizeof (eth0->src_address))))
+ (memcmp (eth0->src_address, arp0->ip4_over_ethernet[0].ethernet,
+ sizeof (eth0->src_address)) && !is_vrrp_reply0))
{
error0 = ETHERNET_ARP_ERROR_l2_address_mismatch;
goto drop;
/* Check if anyone want ARP request events for L2 BDs */
{
- pending_resolution_t *mc;
ethernet_arp_main_t *am = ðernet_arp_main;
- uword *p = hash_get (am->mac_changes_by_address, 0);
- if (p)
- {
- u32 next_index = p[0];
- while (next_index != (u32) ~ 0)
- {
- int (*fp) (u32, u8 *, u32, u32);
- int rv = 1;
- mc = pool_elt_at_index (am->mac_changes, next_index);
- fp = mc->data_callback;
- /* Call the callback, return 1 to suppress dup events */
- if (fp)
- rv = (*fp) (mc->data,
- arp0->ip4_over_ethernet[0].ethernet,
- sw_if_index0,
- arp0->ip4_over_ethernet[0].ip4.as_u32);
- /* Signal the resolver process */
- if (rv == 0)
- vlib_process_signal_event (vm, mc->node_index,
- mc->type_opaque, mc->data);
- next_index = mc->next_index;
- }
- }
+ 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 */
next_l2_feature:
{
- u32 feature_bitmap0 =
- vnet_buffer (p0)->l2.feature_bitmap & ~L2INPUT_FEAT_ARP_TERM;
- vnet_buffer (p0)->l2.feature_bitmap = feature_bitmap0;
- next0 =
- feat_bitmap_get_next_node_index (arp_term_next_node_index,
- feature_bitmap0);
+ 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);
{
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, const vnet_hw_interface_t * hi)
+{
+ ip4_main_t *i4m = &ip4_main;
+ ip4_address_t *ip4_addr =
+ ip4_interface_first_address (i4m, hi->sw_if_index, 0);
+
+ send_ip4_garp_w_addr (vm, ip4_addr, hi);
+}
+
+void
+send_ip4_garp_w_addr (vlib_main_t * vm,
+ const ip4_address_t * ip4_addr,
+ const vnet_hw_interface_t * hi)
+{
+ ip4_main_t *i4m = &ip4_main;
+ u32 sw_if_index = hi->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);
+ clib_memcpy (h->ip4_over_ethernet[0].ethernet, hi->hw_address,
+ sizeof (h->ip4_over_ethernet[0].ethernet));
+ clib_memcpy (h->ip4_over_ethernet[1].ethernet, hi->hw_address,
+ sizeof (h->ip4_over_ethernet[1].ethernet));
+ 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);
+ vlib_buffer_advance (b, -sizeof (ethernet_header_t));
+ ethernet_header_t *e = vlib_buffer_get_current (b);
+ e->type = clib_host_to_net_u16 (ETHERNET_TYPE_ARP);
+ clib_memcpy (e->src_address, hi->hw_address, sizeof (e->src_address));
+ memset (e->dst_address, 0xff, sizeof (e->dst_address));
+
+ /* 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);
+ }
}
/*
Code Review / vpp.git / blobdiff