#include <vppinfra/mhash.h>
#include <vnet/fib/ip4_fib.h>
#include <vnet/adj/adj_nbr.h>
+#include <vnet/adj/adj_mcast.h>
#include <vnet/mpls/mpls.h>
/**
u32 sw_if_index;
ethernet_arp_ip4_over_ethernet_address_t a;
int is_static;
+ int is_no_fib_entry;
int flags;
#define ETHERNET_ARP_ARGS_REMOVE (1<<0)
#define ETHERNET_ARP_ARGS_FLUSH (1<<1)
if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC)
flags = format (flags, "D");
+ 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,
format_ip4_address, &e->ip4_address,
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);
- if (NULL != e)
- {
- adj_nbr_walk_nh4 (sw_if_index,
- &e->ip4_address, arp_mk_complete_walk, e);
- }
- else
+ switch (adj->lookup_next_index)
{
- /*
- * no matching ARP entry.
- * construct the rewire 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));
+ case IP_LOOKUP_NEXT_ARP:
+ case IP_LOOKUP_NEXT_GLEAN:
+ 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);
+ /*
+ * 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_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.
+ * Ofset is 2 bytes into the MAC desintation address. And we copy 23 bits
+ * from the address.
+ */
+ adj_mcast_update_rewrite (ai, rewrite, offset, 0x007fffff);
+
+ 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;
}
}
ethernet_arp_interface_t *arp_int;
int is_static = args->is_static;
u32 sw_if_index = args->sw_if_index;
+ int is_no_fib_entry = args->is_no_fib_entry;
vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index);
if (make_new_arp_cache_entry)
{
- fib_prefix_t pfx = {
- .fp_len = 32,
- .fp_proto = FIB_PROTOCOL_IP4,
- .fp_addr = {
- .ip4 = a->ip4,
- }
- ,
- };
- u32 fib_index;
-
pool_get (am->ip4_entry_pool, e);
if (NULL == arp_int->arp_entries)
clib_memcpy (e->ethernet_address,
a->ethernet, sizeof (e->ethernet_address));
- 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);
+ 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);
+ e->flags |= ETHERNET_ARP_IP4_ENTRY_FLAG_NO_FIB_ENTRY;
+ }
}
else
{
{
ethernet_arp_main_t *am = ðernet_arp_main;
ip4_address_t *address = address_arg;
- uword *p;
+
+ /* 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;
- void (*fp) (u32, u8 *) = data_callback;
+ 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)
{
- pool_get (am->mac_changes, mc);
+ if (found)
+ return VNET_API_ERROR_ENTRY_ALREADY_EXISTS;
- mc->next_index = ~0;
- mc->node_index = node_index;
- mc->type_opaque = type_opaque;
- mc->data = data;
- mc->data_callback = data_callback;
- mc->pid = pid;
+ pool_get (am->mac_changes, mc);
+ *mc = (pending_resolution_t)
+ {
+ .next_index = ~0,.node_index = node_index,.type_opaque =
+ type_opaque,.data = data,.data_callback = data_callback,.pid =
+ pid,};
- p = hash_get (am->mac_changes_by_address, address->as_u32);
+ /* Insert new resolution at the end of the list */
+ u32 new_idx = mc - am->mac_changes;
if (p)
- {
- /* Insert new resolution at the head of the list */
- mc->next_index = p[0];
- hash_unset (am->mac_changes_by_address, address->as_u32);
- }
-
- hash_set (am->mac_changes_by_address, address->as_u32,
- mc - am->mac_changes);
- return 0;
+ p[0] = new_idx;
+ else
+ hash_set (am->mac_changes_by_address, address->as_u32, new_idx);
}
else
{
- u32 index;
- pending_resolution_t *mc_last = 0;
-
- p = hash_get (am->mac_changes_by_address, address->as_u32);
- if (p == 0)
+ if (!found)
return VNET_API_ERROR_NO_SUCH_ENTRY;
- index = p[0];
+ /* Clients may need to clean up pool entries, too */
+ void (*fp) (u32, u8 *) = data_callback;
+ if (fp)
+ (*fp) (mc->data, 0 /* no new mac addrs */ );
- while (index != (u32) ~ 0)
- {
- mc = pool_elt_at_index (am->mac_changes, index);
- if (mc->node_index == node_index &&
- mc->type_opaque == type_opaque && mc->pid == pid)
- {
- /* Clients may need to clean up pool entries, too */
- if (fp)
- (*fp) (mc->data, 0 /* no new mac addrs */ );
- if (index == p[0])
- {
- hash_unset (am->mac_changes_by_address, address->as_u32);
- if (mc->next_index != ~0)
- hash_set (am->mac_changes_by_address, address->as_u32,
- mc->next_index);
- pool_put (am->mac_changes, mc);
- return 0;
- }
- else
- {
- ASSERT (mc_last);
- mc_last->next_index = mc->next_index;
- pool_put (am->mac_changes, mc);
- return 0;
- }
- }
- mc_last = mc;
- index = mc->next_index;
- }
+ /* Remove the entry from the list and delete the entry */
+ *p = mc->next_index;
+ pool_put (am->mac_changes, mc);
- return VNET_API_ERROR_NO_SUCH_ENTRY;
+ /* 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. */
_ (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") \
typedef enum
{
vnet_hw_interface_t *hw_if0;
ethernet_arp_header_t *arp0;
ethernet_header_t *eth0;
- ip_adjacency_t *adj0;
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;
sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+ /* not playing the ARP game if the interface is not IPv4 enabled */
+ error0 =
+ (im4->ip_enabled_by_sw_if_index[sw_if_index0] == 0 ?
+ ETHERNET_ARP_ERROR_interface_not_ip_enabled : error0);
+
if (error0)
goto drop2;
dst_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
&arp0->ip4_over_ethernet[1].ip4,
32);
- dst_flags = fib_entry_get_flags_for_source (dst_fei,
- FIB_SOURCE_INTERFACE);
+ dst_flags = fib_entry_get_flags (dst_fei);
- conn_sw_if_index0 =
- fib_entry_get_resolving_interface_for_source (dst_fei,
- FIB_SOURCE_INTERFACE);
+ 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);
if (!(FIB_ENTRY_FLAG_CONNECTED & dst_flags))
{
is_unnum0 = sw_if_index0 != conn_sw_if_index0;
/* Source must also be local to subnet of matching interface address. */
- 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);
-
if (!((FIB_ENTRY_FLAG_ATTACHED & src_flags) ||
(FIB_ENTRY_FLAG_CONNECTED & src_flags)))
{
vnet_arp_set_ip4_over_ethernet (vnm, sw_if_index0,
&arp0->ip4_over_ethernet[0],
- 0 /* is_static */ );
+ 0 /* is_static */ , 0);
error0 = ETHERNET_ARP_ERROR_l3_src_address_learned;
}
/* get the adj from the destination's covering connected */
if (NULL == pa)
{
- adj0 =
- adj_get (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 (adj0->lookup_next_index != IP_LOOKUP_NEXT_GLEAN)
- {
- error0 = ETHERNET_ARP_ERROR_missing_interface_address;
- goto drop2;
- }
if (is_unnum0)
{
if (!arp_unnumbered (p0, pi0, eth0, conn_sw_if_index0))
goto drop2;
}
else
- vlib_buffer_advance (p0, -adj0->rewrite_header.data_bytes);
+ {
+ 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;
+ }
+ }
}
+
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;
+ /* 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);
hash_unset (eai->arp_entries, e->ip4_address.as_u32);
pool_put (am->ip4_entry_pool, e);
* 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);
int
vnet_arp_set_ip4_over_ethernet (vnet_main_t * vnm,
- u32 sw_if_index, void *a_arg, int is_static)
+ u32 sw_if_index, void *a_arg,
+ int is_static, int is_no_fib_entry)
{
ethernet_arp_ip4_over_ethernet_address_t *a = a_arg;
vnet_arp_set_ip4_over_ethernet_rpc_args_t args;
args.sw_if_index = sw_if_index;
args.is_static = is_static;
+ args.is_no_fib_entry = is_no_fib_entry;
args.flags = 0;
clib_memcpy (&args.a, a, sizeof (*a));
u32 fib_index = 0;
u32 fib_id;
int is_static = 0;
+ int is_no_fib_entry = 0;
int is_proxy = 0;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
else if (unformat (input, "static"))
is_static = 1;
+ else if (unformat (input, "no-fib-entry"))
+ is_no_fib_entry = 1;
+
else if (unformat (input, "count %d", &count))
;
1 /* type */ , 0 /* data */ );
vnet_arp_set_ip4_over_ethernet
- (vnm, sw_if_index, &addr, is_static);
+ (vnm, sw_if_index, &addr, is_static, is_no_fib_entry);
vlib_process_wait_for_event (vm);
event_type = vlib_process_get_events (vm, &event_data);
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] [count <count>] [fib-id <fib-id>] [proxy <lo-addr> - <hi-addr>]",
+ "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* */
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));
pending_resolution_t *mc;
ethernet_arp_main_t *am = ðernet_arp_main;
uword *p = hash_get (am->mac_changes_by_address, 0);
- if (p && (vnet_buffer (p0)->l2.shg == 0))
- { // Only SHG 0 interface which is more likely local
+ if (p)
+ {
u32 next_index = p[0];
while (next_index != (u32) ~ 0)
{
/* 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;
- /* Note that output to VXLAN tunnel will fail due to SHG which
- is probably desireable since ARP termination is not intended
- for ARP requests from other hosts. If output to VXLAN tunnel is
- required, however, can just clear the SHG in packet as follows:
- vnet_buffer(p0)->l2.shg = 0; */
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
to_next, n_left_to_next, pi0,
next0);
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, vnet_buffer (p0)->l2.shg))
+ vnet_buffer (p0)->l2.bd_index))
goto output_response;
}
Code Review / vpp.git / blobdiff