#include <vnet/mpls/mpls.h>
#include <vnet/l2/feat_bitmap.h>
+#include <vlibmemory/api.h>
+
/**
* @file
* @brief IPv4 ARP.
*/
-void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
-
/**
* @brief Per-interface ARP configuration and state
*/
* 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
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;
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;
- u8 *flags = 0;
if (!e)
return format (s, "%=12s%=16s%=6s%=20s%=24s", "Time", "IP4",
si = vnet_get_sw_interface (vnm, e->sw_if_index);
- if (e->flags & IP_NEIGHBOR_FLAG_STATIC)
- flags = format (flags, "S");
-
- if (e->flags & IP_NEIGHBOR_FLAG_DYNAMIC)
- flags = format (flags, "D");
-
- if (e->flags & IP_NEIGHBOR_FLAG_NO_FIB_ENTRY)
- flags = format (flags, "N");
-
- 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_mac_address_t, &e->mac,
- format_vnet_sw_interface_name, vnm, si);
-
- vec_free (flags);
- return s;
+ 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
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)
{
adj = adj_get (ai);
- vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index);
+ 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);
* 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.
+ * Offset is 2 bytes into the MAC destination address.
*/
adj_mcast_update_rewrite (ai, rewrite, offset);
ethernet_arp_interface_t *arp_int;
u32 sw_if_index = args->sw_if_index;
- vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index);
+ arp_enable (am, sw_if_index);
arp_int = &am->ethernet_arp_by_sw_if_index[sw_if_index];
/* Either we drop the packet or we send a reply to the sender. */
typedef enum
{
- ARP_INPUT_NEXT_DROP,
- ARP_INPUT_NEXT_REPLY_TX,
- ARP_INPUT_N_NEXT,
-} arp_input_next_t;
+ 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") \
foreach_ethernet_arp_error
#undef _
ETHERNET_ARP_N_ERROR,
-} ethernet_arp_input_error_t;
+} ethernet_arp_reply_error_t;
static int
arp_unnumbered (vlib_buffer_t * p0,
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;
- vnet_main_t *vnm = vnet_get_main ();
- ip4_main_t *im4 = &ip4_main;
- u32 n_left_from, next_index, *from, *to_next;
- u32 n_replies_sent = 0, n_proxy_arp_replies_sent = 0;
from = vlib_frame_vector_args (frame);
n_left_from = frame->n_vectors;
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)
{
+ const ethernet_arp_header_t *arp0;
+ arp_input_next_t next0;
vlib_buffer_t *p0;
- vnet_hw_interface_t *hw_if0;
- ethernet_arp_header_t *arp0;
- ethernet_header_t *eth_rx, *eth_tx;
- const ip4_address_t *if_addr0;
- ip4_address_t proxy_src;
- u32 pi0, error0, next0, sw_if_index0, conn_sw_if_index0, fib_index0;
- u8 is_request0, dst_is_local0, is_unnum0, is_vrrp_reply0;
- ethernet_proxy_arp_t *pa;
- fib_node_index_t dst_fei, src_fei;
- const fib_prefix_t *pfx0;
- fib_entry_flag_t src_flags, dst_flags;
- u8 *rewrite0, rewrite0_len;
+ u32 pi0, error0;
- pi0 = from[0];
- to_next[0] = pi0;
+ pi0 = to_next[0] = from[0];
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
- pa = 0;
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;
+ next0 = ARP_INPUT_NEXT_DROP;
error0 =
(arp0->l2_type !=
(0 == arp0->ip4_over_ethernet[0].ip4.as_u32 ?
ETHERNET_ARP_ERROR_l3_dst_address_unset : error0);
- sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
+ 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];
- /* 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);
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, pi0, next0);
+ }
- if (error0)
- goto drop2;
+ 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 drop2;
+ goto drop;
}
- dst_fei = ip4_fib_table_lookup (ip4_fib_get (fib_index0),
- &arp0->ip4_over_ethernet[1].ip4,
- 32);
- dst_flags = fib_entry_get_flags (dst_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;
{
/*
* So don't drop immediately here, instead go see if this
* is a proxy ARP case.
*/
- goto drop1;
+ goto next_feature;
}
/* A Source must also be local to subnet of matching
* interface address. */
* (i.e. a /32)
*/
error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local;
- goto drop2;
+ goto drop;
}
}
- if (fib_entry_is_sourced (dst_fei, FIB_SOURCE_ADJ))
+ 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
arp0->ip4_over_ethernet[1].ip4.as_u32)
error0 = arp_learn (vnm, am, sw_if_index0,
&arp0->ip4_over_ethernet[0]);
- goto drop2;
- }
- else if (!(FIB_ENTRY_FLAG_CONNECTED & dst_flags))
- {
+ 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 drop1;
- }
-
- 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.
- */
- is_unnum0 = 1;
+ goto next_feature;
}
dst_is_local0 = (FIB_ENTRY_FLAG_LOCAL & dst_flags);
arp0->ip4_over_ethernet[0].mac.bytes) && !is_vrrp_reply0)
{
error0 = ETHERNET_ARP_ERROR_l2_address_mismatch;
- goto drop2;
+ goto drop;
}
/* Learn or update sender's mapping only for replies to addresses
* we drop */
error0 = ETHERNET_ARP_ERROR_l3_dst_address_not_local;
- goto drop1;
+ goto next_feature;
}
else if (arp0->opcode ==
clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request) &&
(dst_is_local0 == 0))
{
- goto drop1;
+ goto next_feature;
}
- 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);
-
- /* Send reply back through input interface */
- vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
- next0 = ARP_INPUT_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);
-
- if (NULL == pa)
+ /* 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))
{
- if (is_unnum0)
+ /*
+ * 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))
{
- if (!arp_unnumbered (p0, sw_if_index0, conn_sw_if_index0))
- {
- error0 = ETHERNET_ARP_ERROR_unnumbered_mismatch;
- goto drop2;
- }
+ 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 */
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);
+ }
- n_replies_sent += 1;
- continue;
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
- drop1:
- if (arp0->ip4_over_ethernet[0].ip4.as_u32 ==
- arp0->ip4_over_ethernet[1].ip4.as_u32)
+ 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_gratuitous_arp;
- goto drop2;
+ error0 = ETHERNET_ARP_ERROR_interface_no_table;
}
- /* See if proxy arp is configured for the address */
- if (is_request0)
+
+ if (0 == error0 && is_request0)
{
- vnet_sw_interface_t *si;
u32 this_addr = clib_net_to_host_u32
(arp0->ip4_over_ethernet[1].ip4.as_u32);
- u32 fib_index0;
-
- si = vnet_get_sw_interface (vnm, sw_if_index0);
-
- if (!(si->flags & VNET_SW_INTERFACE_FLAG_PROXY_ARP))
- goto drop2;
-
- fib_index0 = vec_elt (im4->fib_index_by_sw_if_index,
- sw_if_index0);
vec_foreach (pa, am->proxy_arps)
{
/*
* change the interface address to the proxied
*/
- if_addr0 = &proxy_src;
- is_unnum0 = 0;
- n_proxy_arp_replies_sent++;
- goto send_reply;
+ n_arp_replies_sent++;
+
+ next0 =
+ arp_mk_reply (vnm, p0, sw_if_index0, &proxy_src, arp0,
+ eth_rx);
}
}
}
-
- drop2:
-
- next0 = ARP_INPUT_NEXT_DROP;
- p0->error = node->errors[error0];
+ else
+ {
+ p0->error = node->errors[error0];
+ }
vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
n_left_to_next, pi0, next0);
}
vlib_error_count (vm, node->node_index,
- ETHERNET_ARP_ERROR_replies_sent,
- n_replies_sent - n_proxy_arp_replies_sent);
+ ETHERNET_ARP_ERROR_replies_sent, n_arp_replies_sent);
- vlib_error_count (vm, node->node_index,
- ETHERNET_ARP_ERROR_proxy_arp_replies_sent,
- n_proxy_arp_replies_sent);
return frame->n_vectors;
}
};
/* *INDENT-OFF* */
+
VLIB_REGISTER_NODE (arp_input_node, static) =
{
.function = arp_input,
.n_next_nodes = ARP_INPUT_N_NEXT,
.next_nodes = {
[ARP_INPUT_NEXT_DROP] = "error-drop",
- [ARP_INPUT_NEXT_REPLY_TX] = "interface-output",
+ [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
/**
* @brief publish wildcard arp event
- * @param sw_if_index The interface on which the ARP entires are acted
+ * @param sw_if_index The interface on which the ARP entries are acted
*/
static int
vnet_arp_wc_publish (u32 sw_if_index,
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
*
{
ethernet_arp_main_t *am = ðernet_arp_main;
ip4_main_t *im = &ip4_main;
- clib_error_t *error;
pg_node_t *pn;
- if ((error = vlib_call_init_function (vm, ethernet_init)))
- return error;
-
ethernet_register_input_type (vm, ETHERNET_TYPE_ARP, arp_input_node.index);
pn = pg_get_node (arp_input_node.index);
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;
return 0;
}
-
-VLIB_INIT_FUNCTION (ethernet_arp_init);
+/* *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_ip4_entry_t *e;
ethernet_arp_interface_t *eai;
- vec_validate (am->ethernet_arp_by_sw_if_index, args->sw_if_index);
+ 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);
}
}
+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)
return 0;
}
-/*
- * Remove any proxy arp entries asdociated with the
- * specificed fib.
- */
-int
-vnet_proxy_arp_fib_reset (u32 fib_id)
+void
+proxy_arp_intfc_walk (proxy_arp_intf_walk_t cb, void *data)
{
ethernet_arp_main_t *am = ðernet_arp_main;
- ethernet_proxy_arp_t *pa;
- u32 *entries_to_delete = 0;
- u32 fib_index;
- int i;
-
- fib_index = fib_table_find (FIB_PROTOCOL_IP4, fib_id);
- if (~0 == fib_index)
- return VNET_API_ERROR_NO_SUCH_ENTRY;
+ ethernet_arp_interface_t *eai;
- vec_foreach (pa, am->proxy_arps)
+ vec_foreach (eai, am->ethernet_arp_by_sw_if_index)
{
- if (pa->fib_index == fib_index)
- {
- vec_add1 (entries_to_delete, pa - am->proxy_arps);
- }
+ if (eai->proxy_enabled)
+ cb (eai - am->ethernet_arp_by_sw_if_index, data);
}
-
- for (i = 0; i < vec_len (entries_to_delete); i++)
- {
- vec_delete (am->proxy_arps, 1, entries_to_delete[i]);
- }
-
- vec_free (entries_to_delete);
-
- return 0;
}
static clib_error_t *
{
vnet_main_t *vnm = vnet_get_main ();
u32 sw_if_index;
- vnet_sw_interface_t *si;
int enable = 0;
- int intfc_set = 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))
- intfc_set = 1;
+ ;
else if (unformat (input, "enable") || unformat (input, "on"))
enable = 1;
else if (unformat (input, "disable") || unformat (input, "off"))
break;
}
- if (intfc_set == 0)
+ if (~0 == sw_if_index)
return clib_error_return (0, "unknown input '%U'",
format_unformat_error, input);
- si = vnet_get_sw_interface (vnm, sw_if_index);
- ASSERT (si);
- if (enable)
- si->flags |= VNET_SW_INTERFACE_FLAG_PROXY_ARP;
- else
- si->flags &= ~VNET_SW_INTERFACE_FLAG_PROXY_ARP;
+ vnet_proxy_arp_enable_disable (vnm, sw_if_index, enable);
return 0;
}
}
/*
- * Remove any arp entries asociated with the specificed interface
+ * 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_main_t *am = ðernet_arp_main;
ethernet_arp_ip4_entry_t *e;
/* *INDENT-OFF* */
pool_foreach (e, am->ip4_entry_pool, ({
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);
Code Review / vpp.git / blobdiff