*/
#include <vnet/ip/ip.h>
+#include <vnet/ip/ip6.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ethernet/arp_packet.h>
#include <vnet/l2/l2_input.h>
#include <vppinfra/mhash.h>
+#include <vnet/fib/ip4_fib.h>
+#include <vnet/adj/adj.h>
+#include <vnet/mpls/mpls.h>
+
+/**
+ * @file
+ * @brief IPv4 ARP.
+ *
+ * This file contains code to manage the IPv4 ARP tables (IP Address
+ * to MAC Address lookup).
+ */
+
void vl_api_rpc_call_main_thread (void *fp, u8 * data, u32 data_length);
-typedef struct {
+typedef struct
+{
u32 sw_if_index;
- u32 fib_index;
ip4_address_t ip4_address;
-} ethernet_arp_ip4_key_t;
-typedef struct {
- ethernet_arp_ip4_key_t key;
u8 ethernet_address[6];
u16 flags;
-#define ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC (1 << 0)
-#define ETHERNET_ARP_IP4_ENTRY_FLAG_GLEAN (2 << 0)
+#define ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC (1 << 0)
+#define ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC (1 << 1)
u64 cpu_time_last_updated;
-
- u32 * adjacencies;
+ adj_index_t adj_index[FIB_LINK_NUM];
} ethernet_arp_ip4_entry_t;
-typedef struct {
+/**
+ * @brief administrative and operational state falgs on an interface
+ */
+typedef enum ethernet_arp_interface_flags_t_
+{
+ ETHERNET_ARP_INTERFACE_UP = (0 << 1),
+ ETHERNET_ARP_INTERFACE_MPLS_ENABLE = (1 << 0),
+} ethernet_arp_interface_flags_t;
+
+/**
+ * @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;
+
+ /**
+ * Flags for administrative and operational state
+ */
+ ethernet_arp_interface_flags_t flags;
+} ethernet_arp_interface_t;
+
+typedef struct
+{
u32 lo_addr;
u32 hi_addr;
u32 fib_index;
} ethernet_proxy_arp_t;
-typedef struct {
+typedef struct
+{
u32 next_index;
uword node_index;
uword type_opaque;
uword data;
/* Used for arp event notification only */
- void * data_callback;
+ void *data_callback;
u32 pid;
} pending_resolution_t;
-typedef struct {
+typedef struct
+{
/* Hash tables mapping name to opcode. */
- uword * opcode_by_name;
+ uword *opcode_by_name;
/* lite beer "glean" adjacency handling */
- uword * pending_resolutions_by_address;
- pending_resolution_t * pending_resolutions;
+ uword *pending_resolutions_by_address;
+ pending_resolution_t *pending_resolutions;
/* Mac address change notification */
- uword * mac_changes_by_address;
- pending_resolution_t * mac_changes;
-
- u32 * arp_input_next_index_by_hw_if_index;
+ uword *mac_changes_by_address;
+ pending_resolution_t *mac_changes;
- ethernet_arp_ip4_entry_t * ip4_entry_pool;
+ ethernet_arp_ip4_entry_t *ip4_entry_pool;
- mhash_t ip4_entry_by_key;
-
/* 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;
+ ethernet_proxy_arp_t *proxy_arps;
} ethernet_arp_main_t;
static ethernet_arp_main_t ethernet_arp_main;
-static u8 * format_ethernet_arp_hardware_type (u8 * s, va_list * va)
+
+typedef enum arp_ether_type_t_
+{
+ ARP_ETHER_TYPE_IP4 = (1 << 0),
+ ARP_ETHER_TYPE_MPLS = (1 << 1),
+} arp_ether_type_t;
+#define ARP_ETHER_TYPE_BOTH (ARP_ETHER_TYPE_MPLS | ARP_ETHER_TYPE_IP4)
+
+typedef struct
+{
+ u32 sw_if_index;
+ ethernet_arp_ip4_over_ethernet_address_t a;
+ int is_static;
+ int flags;
+#define ETHERNET_ARP_ARGS_REMOVE (1<<0)
+#define ETHERNET_ARP_ARGS_FLUSH (1<<1)
+#define ETHERNET_ARP_ARGS_POPULATE (1<<2)
+ arp_ether_type_t ether_type;
+} vnet_arp_set_ip4_over_ethernet_rpc_args_t;
+
+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;
+ char *t = 0;
switch (h)
{
#define _(n,f) case n: t = #f; break;
return format (s, "%s", t);
}
-static u8 * format_ethernet_arp_opcode (u8 * s, va_list * va)
+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;
+ char *t = 0;
switch (o)
{
#define _(f) case ETHERNET_ARP_OPCODE_##f: t = #f; break;
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 *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 (unformat (input, "0x%x", &x) || unformat (input, "%d", &x))
{
if (x >= (1 << 16))
return 0;
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))
+ 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);
+ *result = clib_host_to_net_u16 ((u16) * result);
return 1;
}
-static u8 * format_ethernet_arp_header (u8 * s, va_list * va)
+static u8 *
+format_ethernet_arp_header (u8 * s, va_list * va)
{
- ethernet_arp_header_t * a = va_arg (*va, ethernet_arp_header_t *);
+ ethernet_arp_header_t *a = va_arg (*va, ethernet_arp_header_t *);
u32 max_header_bytes = va_arg (*va, u32);
uword indent;
u16 l2_type, l3_type;
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)
{
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);
+ 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;
}
-static u8 * format_ethernet_arp_ip4_entry (u8 * s, va_list * va)
+static 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;
- ip4_fib_t * fib;
- u8 * flags = 0;
-
- if (! e)
- return format (s, "%=12s%=6s%=16s%=6s%=20s%=24s", "Time", "FIB", "IP4",
- "Flags", "Ethernet", "Interface");
+ 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;
- fib = find_ip4_fib_by_table_index_or_id (&ip4_main, e->key.fib_index,
- IP4_ROUTE_FLAG_FIB_INDEX);
- si = vnet_get_sw_interface (vnm, e->key.sw_if_index);
+ if (!e)
+ return format (s, "%=12s%=16s%=6s%=20s%=24s", "Time", "IP4",
+ "Flags", "Ethernet", "Interface");
- if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_GLEAN)
- flags = format(flags, "G");
+ si = vnet_get_sw_interface (vnm, e->sw_if_index);
if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC)
- flags = format(flags, "S");
+ flags = format (flags, "S");
- s = format (s, "%=12U%=6u%=16U%=6s%=20U%=24U",
+ if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC)
+ flags = format (flags, "D");
+
+ s = format (s, "%=12U%=16U%=6s%=20U%=24U",
format_vlib_cpu_time, vnm->vlib_main, e->cpu_time_last_updated,
- fib->table_id,
- format_ip4_address, &e->key.ip4_address,
+ format_ip4_address, &e->ip4_address,
flags ? (char *) flags : "",
format_ethernet_address, e->ethernet_address,
format_vnet_sw_interface_name, vnm, si);
- vec_free(flags);
+ vec_free (flags);
return s;
}
-typedef struct {
+typedef struct
+{
u8 packet_data[64];
} ethernet_arp_input_trace_t;
-static u8 * format_ethernet_arp_input_trace (u8 * s, va_list * va)
+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 *);
+ ethernet_arp_input_trace_t *t = va_arg (*va, ethernet_arp_input_trace_t *);
s = format (s, "%U",
format_ethernet_arp_header,
return s;
}
-clib_error_t *
-ethernet_arp_sw_interface_up_down (vnet_main_t * vnm,
- u32 sw_if_index,
- u32 flags)
+static u8 *
+format_arp_term_input_trace (u8 * s, va_list * va)
{
- ethernet_arp_main_t * am = ðernet_arp_main;
- ethernet_arp_ip4_entry_t * e;
-
- if (! (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP))
- {
- u32 i, * to_delete = 0;
-
- pool_foreach (e, am->ip4_entry_pool, ({
- if (e->key.sw_if_index == sw_if_index)
- vec_add1 (to_delete, e - am->ip4_entry_pool);
- }));
-
- for (i = 0; i < vec_len (to_delete); i++)
- {
- ethernet_arp_ip4_over_ethernet_address_t delme;
- e = pool_elt_at_index (am->ip4_entry_pool, to_delete[i]);
-
- memcpy (&delme.ethernet, e->ethernet_address, 6);
- delme.ip4.as_u32 = e->key.ip4_address.as_u32;
-
- vnet_arp_unset_ip4_over_ethernet (vnm, e->key.sw_if_index,
- e->key.fib_index, &delme);
- }
-
- vec_free (to_delete);
- }
-
- return 0;
-}
-
-VNET_SW_INTERFACE_ADMIN_UP_DOWN_FUNCTION (ethernet_arp_sw_interface_up_down);
-
-static int
-vnet_arp_set_ip4_over_ethernet_internal (vnet_main_t * vnm,
- u32 sw_if_index,
- u32 fib_index,
- void * a_arg,
- int is_static);
-
-static int
-vnet_arp_unset_ip4_over_ethernet_internal (vnet_main_t * vnm,
- u32 sw_if_index,
- u32 fib_index,
- void * a_arg);
+ 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 *);
-typedef struct {
- u32 sw_if_index;
- u32 fib_index;
- ethernet_arp_ip4_over_ethernet_address_t a;
- int is_static;
- int is_remove; /* set is_remove=1 to clear arp entry */
-} vnet_arp_set_ip4_over_ethernet_rpc_args_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));
-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(os_get_cpu_number() == 0);
-
- if (a->is_remove)
- vnet_arp_unset_ip4_over_ethernet_internal(vm,
- a->sw_if_index,
- a->fib_index,
- &(a->a));
- else
- vnet_arp_set_ip4_over_ethernet_internal (vm,
- a->sw_if_index,
- a->fib_index,
- &(a->a),
- a->is_static);
+ return s;
}
-int
-vnet_arp_set_ip4_over_ethernet (vnet_main_t * vnm,
- u32 sw_if_index,
- u32 fib_index,
- void * a_arg,
- int is_static)
+static void
+arp_mk_complete (ethernet_arp_interface_t * eai,
+ ethernet_arp_ip4_entry_t * e, arp_ether_type_t et)
{
- ethernet_arp_ip4_over_ethernet_address_t * a = a_arg;
- vnet_arp_set_ip4_over_ethernet_rpc_args_t args;
+ fib_prefix_t pfx = {
+ .fp_len = 32,
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_addr = {
+ .ip4 = e->ip4_address,
+ },
+ };
+ u32 fib_index;
- args.sw_if_index = sw_if_index;
- args.fib_index = fib_index;
- args.is_static = is_static;
- args.is_remove = 0;
- memcpy (&args.a, a, sizeof (*a));
+ fib_index = ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index);
- vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback,
- (u8 *) &args, sizeof (args));
- return 0;
+ if (et & ARP_ETHER_TYPE_IP4)
+ {
+ if (ADJ_INDEX_INVALID == e->adj_index[FIB_LINK_IP4])
+ {
+ e->adj_index[FIB_LINK_IP4] =
+ adj_nbr_add_or_lock_w_rewrite (FIB_PROTOCOL_IP4,
+ FIB_LINK_IP4,
+ &pfx.fp_addr,
+ e->sw_if_index,
+ e->ethernet_address);
+ ASSERT (ADJ_INDEX_INVALID != e->adj_index[FIB_LINK_IP4]);
+
+ 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,
+ MPLS_LABEL_INVALID,
+ FIB_ROUTE_PATH_FLAG_NONE);
+ }
+ else
+ {
+ adj_nbr_update_rewrite (e->adj_index[FIB_LINK_IP4],
+ e->ethernet_address);
+ }
+ }
+ if ((et & ARP_ETHER_TYPE_MPLS) &&
+ eai->flags & ETHERNET_ARP_INTERFACE_MPLS_ENABLE)
+ {
+ if (ADJ_INDEX_INVALID == e->adj_index[FIB_LINK_MPLS])
+ {
+ e->adj_index[FIB_LINK_MPLS] =
+ adj_nbr_add_or_lock_w_rewrite (FIB_PROTOCOL_IP4,
+ FIB_LINK_MPLS,
+ &pfx.fp_addr,
+ e->sw_if_index,
+ e->ethernet_address);
+ ASSERT (ADJ_INDEX_INVALID != e->adj_index[FIB_LINK_MPLS]);
+ }
+ else
+ {
+ adj_nbr_update_rewrite (e->adj_index[FIB_LINK_MPLS],
+ e->ethernet_address);
+ }
+ }
}
int
vnet_arp_set_ip4_over_ethernet_internal (vnet_main_t * vnm,
- u32 sw_if_index,
- u32 fib_index,
- void * a_arg,
- int is_static)
+ vnet_arp_set_ip4_over_ethernet_rpc_args_t
+ * args)
{
- ethernet_arp_ip4_key_t k;
- ethernet_arp_ip4_entry_t * e = 0;
- ethernet_arp_main_t * am = ðernet_arp_main;
- ethernet_arp_ip4_over_ethernet_address_t * a = a_arg;
- vlib_main_t * vm = vlib_get_main();
- ip4_main_t * im = &ip4_main;
- ip_lookup_main_t * lm = &im->lookup_main;
- int make_new_arp_cache_entry=1;
- uword * p;
- ip4_add_del_route_args_t args;
- ip_adjacency_t adj, * existing_adj;
- pending_resolution_t * pr, * mc;
-
- u32 next_index;
- u32 adj_index;
-
- fib_index = (fib_index != (u32)~0)
- ? fib_index : im->fib_index_by_sw_if_index[sw_if_index];
-
- k.sw_if_index = sw_if_index;
- k.ip4_address = a->ip4;
- k.fib_index = fib_index;
+ ethernet_arp_ip4_entry_t *e = 0;
+ ethernet_arp_main_t *am = ðernet_arp_main;
+ ethernet_arp_ip4_over_ethernet_address_t *a = &args->a;
+ 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;
+ fib_link_t link;
+ int is_static = args->is_static;
+ u32 sw_if_index = args->sw_if_index;
- p = mhash_get (&am->ip4_entry_by_key, &k);
- if (p)
- {
- e = pool_elt_at_index (am->ip4_entry_pool, p[0]);
+ vec_validate (am->ethernet_arp_by_sw_if_index, sw_if_index);
- /* Refuse to over-write static arp. */
- if (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC)
- return -2;
- make_new_arp_cache_entry = 0;
- }
+ arp_int = &am->ethernet_arp_by_sw_if_index[sw_if_index];
- /* Note: always install the route. It might have been deleted */
- memset(&adj, 0, sizeof(adj));
- adj.lookup_next_index = IP_LOOKUP_NEXT_REWRITE;
-
- vnet_rewrite_for_sw_interface
- (vnm,
- VNET_L3_PACKET_TYPE_IP4,
- sw_if_index,
- ip4_rewrite_node.index,
- a->ethernet, /* destination address */
- &adj.rewrite_header,
- sizeof (adj.rewrite_data));
-
- /* result of this lookup should be next-hop adjacency */
- adj_index = ip4_fib_lookup_with_table (im, fib_index, &a->ip4, 0);
- existing_adj = ip_get_adjacency(lm, adj_index);
-
- if (existing_adj->lookup_next_index == IP_LOOKUP_NEXT_ARP &&
- existing_adj->arp.next_hop.ip4.as_u32 == a->ip4.as_u32)
+ if (NULL != arp_int->arp_entries)
{
- u32 * ai;
- u32 * adjs = vec_dup(e->adjacencies);
- /* Update all adj assigned to this arp entry */
- vec_foreach(ai, adjs)
+ p = hash_get (arp_int->arp_entries, a->ip4.as_u32);
+ if (p)
{
- int i;
- ip_adjacency_t * uadj = ip_get_adjacency(lm, *ai);
- for (i = 0; i < uadj->n_adj; i++)
- if (uadj[i].lookup_next_index == IP_LOOKUP_NEXT_ARP &&
- uadj[i].arp.next_hop.ip4.as_u32 == a->ip4.as_u32)
- ip_update_adjacency (lm, *ai + i, &adj);
+ e = pool_elt_at_index (am->ip4_entry_pool, p[0]);
+
+ /* Refuse to over-write static arp. */
+ if (!is_static && (e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC))
+ return -2;
+ make_new_arp_cache_entry = 0;
}
- vec_free(adjs);
- }
- else
- {
- /* create new adj */
- args.table_index_or_table_id = fib_index;
- args.flags = IP4_ROUTE_FLAG_FIB_INDEX | IP4_ROUTE_FLAG_ADD | IP4_ROUTE_FLAG_NEIGHBOR;
- args.dst_address = a->ip4;
- args.dst_address_length = 32;
- args.adj_index = ~0;
- args.add_adj = &adj;
- args.n_add_adj = 1;
- ip4_add_del_route (im, &args);
}
if (make_new_arp_cache_entry)
{
pool_get (am->ip4_entry_pool, e);
- mhash_set (&am->ip4_entry_by_key, &k,
- e - am->ip4_entry_pool,
- /* old value */ 0);
- e->key = k;
+
+ if (NULL == arp_int->arp_entries)
+ {
+ arp_int->arp_entries = hash_create (0, sizeof (u32));
+ if (mpls_sw_interface_is_enabled (sw_if_index))
+ arp_int->flags |= ETHERNET_ARP_INTERFACE_MPLS_ENABLE;
+ }
+
+ hash_set (arp_int->arp_entries, a->ip4.as_u32, e - am->ip4_entry_pool);
+
+ e->sw_if_index = sw_if_index;
+ e->ip4_address = a->ip4;
+ FOR_EACH_FIB_LINK (link)
+ {
+ e->adj_index[link] = ADJ_INDEX_INVALID;
+ }
}
/* Update time stamp and ethernet address. */
- memcpy (e->ethernet_address, a->ethernet, sizeof (e->ethernet_address));
+ clib_memcpy (e->ethernet_address, a->ethernet,
+ sizeof (e->ethernet_address));
e->cpu_time_last_updated = clib_cpu_time_now ();
if (is_static)
e->flags |= ETHERNET_ARP_IP4_ENTRY_FLAG_STATIC;
+ else
+ e->flags |= ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC;
+
+ arp_mk_complete (arp_int, e, ARP_ETHER_TYPE_BOTH);
/* Customer(s) waiting for this address to be resolved? */
p = hash_get (am->pending_resolutions_by_address, a->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);
- }
-
+ 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, a->ip4.as_u32);
}
p = hash_get (am->mac_changes_by_address, a->ip4.as_u32);
if (p)
{
+ u32 next_index;
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 user's data callback, return 1 to suppress dup events */
- if (fp)
- rv = (*fp)(mc->data, a->ethernet, 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;
- }
+ 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 user's data callback, return 1 to suppress dup events */
+ if (fp)
+ rv = (*fp) (mc->data, a->ethernet, 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)
+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;
-
+ 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->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);
+
+ 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,
- void * data_callback,
- u32 pid,
- void * address_arg,
- uword node_index,
- uword type_opaque,
- uword data, int is_add)
+int
+vnet_add_del_ip4_arp_change_event (vnet_main_t * vnm,
+ void *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;
- uword * p;
- pending_resolution_t * mc;
- void (*fp)(u32, u8 *) = data_callback;
-
+ ethernet_arp_main_t *am = ðernet_arp_main;
+ ip4_address_t *address = address_arg;
+ uword *p;
+ pending_resolution_t *mc;
+ void (*fp) (u32, u8 *) = data_callback;
+
if (is_add)
{
pool_get (am->mac_changes, mc);
mc->data = data;
mc->data_callback = data_callback;
mc->pid = pid;
-
+
p = hash_get (am->mac_changes_by_address, address->as_u32);
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);
+ {
+ /* 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;
}
else
{
u32 index;
- pending_resolution_t * mc_last = 0;
+ pending_resolution_t *mc_last = 0;
p = hash_get (am->mac_changes_by_address, address->as_u32);
if (p == 0)
- return VNET_API_ERROR_NO_SUCH_ENTRY;
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
index = p[0];
- 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;
- }
-
+ 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;
+ }
+
return VNET_API_ERROR_NO_SUCH_ENTRY;
}
}
/* Either we drop the packet or we send a reply to the sender. */
-typedef enum {
+typedef enum
+{
ARP_INPUT_NEXT_DROP,
+ ARP_INPUT_NEXT_REPLY_TX,
ARP_INPUT_N_NEXT,
} arp_input_next_t;
_ (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") \
-typedef enum {
+typedef enum
+{
#define _(sym,string) ETHERNET_ARP_ERROR_##sym,
foreach_ethernet_arp_error
#undef _
- ETHERNET_ARP_N_ERROR,
+ ETHERNET_ARP_N_ERROR,
} ethernet_arp_input_error_t;
-/* get first interface address */
-ip4_address_t *
-ip4_interface_first_address (ip4_main_t * im, u32 sw_if_index,
- ip_interface_address_t ** result_ia)
-{
- ip_lookup_main_t * lm = &im->lookup_main;
- ip_interface_address_t * ia = 0;
- ip4_address_t * result = 0;
- foreach_ip_interface_address (lm, ia, sw_if_index,
- 1 /* honor unnumbered */,
- ({
- ip4_address_t * a = ip_interface_address_get_address (lm, ia);
- result = a;
- break;
- }));
- if (result_ia)
- *result_ia = result ? ia : 0;
- return result;
-}
-
-static void unset_random_arp_entry (void)
+static void
+unset_random_arp_entry (void)
{
- ethernet_arp_main_t * am = ðernet_arp_main;
- ethernet_arp_ip4_entry_t * e;
- vnet_main_t * vnm = vnet_get_main();
- ethernet_arp_ip4_over_ethernet_address_t delme;
+ ethernet_arp_main_t *am = ðernet_arp_main;
+ ethernet_arp_ip4_entry_t *e;
+ vnet_main_t *vnm = vnet_get_main ();
+ ethernet_arp_ip4_over_ethernet_address_t delme;
u32 index;
index = pool_next_index (am->ip4_entry_pool, am->arp_delete_rotor);
return;
e = pool_elt_at_index (am->ip4_entry_pool, index);
-
- memcpy (&delme.ethernet, e->ethernet_address, 6);
- delme.ip4.as_u32 = e->key.ip4_address.as_u32;
-
- vnet_arp_unset_ip4_over_ethernet (vnm, e->key.sw_if_index,
- e->key.fib_index, &delme);
+
+ clib_memcpy (&delme.ethernet, e->ethernet_address, 6);
+ delme.ip4.as_u32 = e->ip4_address.as_u32;
+
+ vnet_arp_unset_ip4_over_ethernet (vnm, e->sw_if_index, &delme);
}
-
-static u32 arp_unnumbered (vlib_buffer_t * p0,
- u32 pi0,
- ethernet_header_t * eth0,
- ip_interface_address_t * ifa0)
+
+static void
+arp_unnumbered (vlib_buffer_t * p0,
+ u32 pi0, ethernet_header_t * eth0, u32 sw_if_index)
{
- ethernet_arp_main_t * am = ðernet_arp_main;
- 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;
+ 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 *broadcast_swifs = 0;
+ u32 *buffers = 0;
u32 n_alloc = 0;
- vlib_buffer_t * b0;
+ vlib_buffer_t *b0;
int i;
u8 dst_mac_address[6];
i16 header_size;
- ethernet_arp_header_t * arp0;
+ ethernet_arp_header_t *arp0;
/* Save the dst mac address */
- memcpy(dst_mac_address, eth0->dst_address, sizeof (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 = ifa0->sw_if_index;
+ unnum_src_sw_if_index = sw_if_index;
/* Track down all users of the unnumbered source */
- pool_foreach (si, vim->sw_interfaces,
+ /* *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))
+ (si->unnumbered_sw_if_index == unnum_src_sw_if_index))
{
- vec_add1 (broadcast_swifs, si->sw_if_index);
+ vec_add1 (broadcast_swifs, si->sw_if_index);
}
}));
-
+ /* *INDENT-ON* */
- ASSERT (vec_len(broadcast_swifs));
+ ASSERT (vec_len (broadcast_swifs));
/* Allocate buffering if we need it */
- if (vec_len(broadcast_swifs) > 1)
+ 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_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 */
- 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];
- }
+ {
+ 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++)
+
+ for (i = 0; i < vec_len (buffers); i++)
{
- b0 = vlib_get_buffer(vm, buffers[i]);
+ 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;
+ vnet_buffer (b0)->sw_if_index[VLIB_TX] = hi->sw_if_index;
/* Fix ARP pkt src address */
- memcpy (arp0->ip4_over_ethernet[0].ethernet, hi->hw_address, 6);
+ 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;
+ if (si->sub.eth.flags.one_tag)
+ header_size += 4;
else if (si->sub.eth.flags.two_tags)
- header_size += 8;
-
+ 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);
- }
-
+ 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 */
- memcpy (eth0->dst_address, dst_mac_address, sizeof (eth0->dst_address));
- memcpy (eth0->src_address, hi->hw_address, sizeof (eth0->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);
- }
+ {
+ 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);
+ }
}
- hi = vnet_get_sup_hw_interface (vnm, broadcast_swifs[0]);
+ /* The regular path outputs the original pkt.. */
+ vnet_buffer (p0)->sw_if_index[VLIB_TX] = broadcast_swifs[0];
vec_free (broadcast_swifs);
vec_free (buffers);
-
- /* The regular path outputs the original pkt.. */
- return vec_elt (am->arp_input_next_index_by_hw_if_index, hi->hw_if_index);
}
static uword
-arp_input (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+arp_input (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();
- ip4_main_t * im4 = &ip4_main;
- u32 n_left_from, next_index, * from, * 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);
{
u32 n_left_to_next;
- vlib_get_next_frame (vm, node, next_index,
- to_next, 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;
- vnet_hw_interface_t * hw_if0;
- ethernet_arp_header_t * arp0;
- ethernet_header_t * eth0;
- ip_interface_address_t * ifa0;
- ip_adjacency_t * adj0;
- ip4_address_t * if_addr0;
- ip4_address_t proxy_src;
- u32 pi0, error0, next0, sw_if_index0;
- u8 is_request0, src_is_local0, dst_is_local0, is_unnum0;
- ethernet_proxy_arp_t * pa;
+ vlib_buffer_t *p0;
+ 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;
+ 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;
pi0 = from[0];
to_next[0] = pi0;
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);
- is_request0 = arp0->opcode
- == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request);
+ is_request0 = arp0->opcode
+ == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_request);
error0 = ETHERNET_ARP_ERROR_replies_sent;
- 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 =
+ (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 drop1;
+ goto drop2;
/* Check that IP address is local and matches incoming interface. */
- if_addr0 = ip4_interface_address_matching_destination (im4,
- &arp0->ip4_over_ethernet[1].ip4,
- sw_if_index0,
- &ifa0);
- if (! if_addr0)
+ 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;
+
+ }
+ 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);
+
+ 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 != ifa0->sw_if_index;
+ /* 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 (! ip4_destination_matches_interface (im4, &arp0->ip4_over_ethernet[0].ip4, ifa0))
+ 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)) ||
+ sw_if_index0 != fib_entry_get_resolving_interface (src_fei))
{
error0 = ETHERNET_ARP_ERROR_l3_src_address_not_local;
- goto drop1;
+ goto drop2;
}
/* Reject requests/replies with our local interface address. */
- src_is_local0 = if_addr0->as_u32 == arp0->ip4_over_ethernet[0].ip4.as_u32;
- if (src_is_local0)
+ if (FIB_ENTRY_FLAG_LOCAL & src_flags)
{
error0 = ETHERNET_ARP_ERROR_l3_src_address_is_local;
- goto drop1;
+ goto drop2;
}
- dst_is_local0 = if_addr0->as_u32 == arp0->ip4_over_ethernet[1].ip4.as_u32;
+ 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);
- /* 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)))
- {
- error0 = ETHERNET_ARP_ERROR_l2_address_mismatch;
- goto drop2;
- }
+ /* 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)))
+ {
+ 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)
- {
- 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,
- (u32)~0 /* default fib */,
- &arp0->ip4_over_ethernet[0],
- 0 /* is_static */);
+ if (ethernet_address_cast (eth0->dst_address) ==
+ ETHERNET_ADDRESS_UNICAST || is_request0)
+ {
+ 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 */ );
error0 = ETHERNET_ARP_ERROR_l3_src_address_learned;
- }
+ }
/* Only send a reply for requests sent which match a local interface. */
- if (! (is_request0 && dst_is_local0))
+ if (!(is_request0 && dst_is_local0))
{
- error0 = (arp0->opcode == clib_host_to_net_u16 (ETHERNET_ARP_OPCODE_reply)
- ? ETHERNET_ARP_ERROR_replies_received : error0);
+ 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_reply:
vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0;
hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0);
- /* Can happen in a multi-core env. */
- if (PREDICT_FALSE(hw_if0->hw_if_index >= vec_len (am->arp_input_next_index_by_hw_if_index)))
- {
- error0 = ETHERNET_ARP_ERROR_missing_interface_address;
- goto drop2;
- }
-
- next0 = vec_elt (am->arp_input_next_index_by_hw_if_index, hw_if0->hw_if_index);
+ /* 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];
- memcpy (arp0->ip4_over_ethernet[0].ethernet, hw_if0->hw_address, 6);
- clib_mem_unaligned (&arp0->ip4_over_ethernet[0].ip4.data_u32, u32) = if_addr0->data_u32;
+ clib_memcpy (arp0->ip4_over_ethernet[0].ethernet,
+ hw_if0->hw_address, 6);
+ 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);
- memcpy (eth0->dst_address, eth0->src_address, 6);
- memcpy (eth0->src_address, hw_if0->hw_address, 6);
+ clib_memcpy (eth0->dst_address, eth0->src_address, 6);
+ clib_memcpy (eth0->src_address, hw_if0->hw_address, 6);
/* Figure out how much to rewind current data from adjacency. */
- if (ifa0)
- {
- adj0 = ip_get_adjacency (&ip4_main.lookup_main,
- ifa0->neighbor_probe_adj_index);
- if (adj0->lookup_next_index != IP_LOOKUP_NEXT_ARP)
- {
- error0 = ETHERNET_ARP_ERROR_missing_interface_address;
- goto drop2;
- }
- if (is_unnum0)
- next0 = arp_unnumbered (p0, pi0, eth0, ifa0);
- else
- vlib_buffer_advance (p0, -adj0->rewrite_header.data_bytes);
- }
-
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,to_next,
- n_left_to_next,pi0,next0);
+ /* 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)
+ arp_unnumbered (p0, pi0, eth0, conn_sw_if_index0);
+ else
+ vlib_buffer_advance (p0, -adj0->rewrite_header.data_bytes);
+ }
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
+ n_left_to_next, pi0, next0);
n_replies_sent += 1;
continue;
drop1:
- 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;
- goto drop2;
- }
- /* See if proxy arp is configured for the address */
- if (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)
- {
- u32 lo_addr = clib_net_to_host_u32 (pa->lo_addr);
- u32 hi_addr = clib_net_to_host_u32 (pa->hi_addr);
-
- /* an ARP request hit in the proxy-arp table? */
- 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.
- * $$$ is the answer ever anything other than
- * vlib_buffer_reset(..)?
- */
- ifa0 = 0;
- if_addr0 = &proxy_src;
- vlib_buffer_reset (p0);
- n_proxy_arp_replies_sent++;
- goto send_reply;
- }
- }
- }
-
- drop2:
+ 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;
+ goto drop2;
+ }
+ /* See if proxy arp is configured for the address */
+ if (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)
+ {
+ u32 lo_addr = clib_net_to_host_u32 (pa->lo_addr);
+ u32 hi_addr = clib_net_to_host_u32 (pa->hi_addr);
+
+ /* an ARP request hit in the proxy-arp table? */
+ 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.
+ */
+ 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;
+ }
+ }
+ }
+
+ drop2:
next0 = ARP_INPUT_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_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 - n_proxy_arp_replies_sent);
-
+ ETHERNET_ARP_ERROR_replies_sent,
+ n_replies_sent - n_proxy_arp_replies_sent);
+
vlib_error_count (vm, node->node_index,
- ETHERNET_ARP_ERROR_proxy_arp_replies_sent,
- n_proxy_arp_replies_sent);
+ ETHERNET_ARP_ERROR_proxy_arp_replies_sent,
+ n_proxy_arp_replies_sent);
return frame->n_vectors;
}
-static char * ethernet_arp_error_strings[] = {
+static char *ethernet_arp_error_strings[] = {
#define _(sym,string) string,
foreach_ethernet_arp_error
#undef _
};
-VLIB_REGISTER_NODE (arp_input_node,static) = {
+/* *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_REPLY_TX] = "interface-output",
},
-
.format_buffer = format_ethernet_arp_header,
.format_trace = format_ethernet_arp_input_trace,
};
-
-clib_error_t *
-ethernet_arp_hw_interface_link_up_down (vnet_main_t * vnm,
- u32 hw_if_index,
- u32 flags)
-{
- ethernet_arp_main_t * am = ðernet_arp_main;
- vnet_hw_interface_t * hw_if;
-
- hw_if = vnet_get_hw_interface (vnm, hw_if_index);
-
- /* Fill in lookup tables with default table (0). */
- vec_validate_init_empty (am->arp_input_next_index_by_hw_if_index, hw_if_index, ~0);
- am->arp_input_next_index_by_hw_if_index[hw_if_index]
- = vlib_node_add_next (vnm->vlib_main, arp_input_node.index, hw_if->output_node_index);
-
- return 0;
-}
-
-VNET_HW_INTERFACE_LINK_UP_DOWN_FUNCTION (ethernet_arp_hw_interface_link_up_down);
+/* *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;
+ ethernet_arp_ip4_entry_t *e1 = a1;
+ ethernet_arp_ip4_entry_t *e2 = a2;
int cmp;
- vnet_main_t * vnm = vnet_get_main();
+ vnet_main_t *vnm = vnet_get_main ();
- cmp = vnet_sw_interface_compare
- (vnm, e1->key.sw_if_index, e2->key.sw_if_index);
- if (! cmp)
- cmp = ip4_address_compare (&e1->key.ip4_address, &e2->key.ip4_address);
+ 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;
}
static clib_error_t *
show_ip4_arp (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
+ 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;
+ 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. */
(void) unformat_user (input, unformat_vnet_sw_interface, vnm, &sw_if_index);
es = 0;
- pool_foreach (e, am->ip4_entry_pool, ({ vec_add1 (es, e[0]); }));
- if ( es )
+ /* *INDENT-OFF* */
+ pool_foreach (e, am->ip4_entry_pool,
+ ({
+ vec_add1 (es, e[0]);
+ }));
+ /* *INDENT-ON* */
+
+ if (es)
{
vec_sort_with_function (es, ip4_arp_entry_sort);
vlib_cli_output (vm, "%U", format_ethernet_arp_ip4_entry, vnm, 0);
- vec_foreach (e, es) {
- if (sw_if_index != ~0 && e->key.sw_if_index != sw_if_index)
- continue;
- vlib_cli_output (vm, "%U", format_ethernet_arp_ip4_entry, vnm, e);
+ vec_foreach (e, es)
+ {
+ if (sw_if_index != ~0 && e->sw_if_index != sw_if_index)
+ continue;
+ 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);
- }
+ 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 ARP table",
+ .short_help = "show ip arp",
};
+/* *INDENT-ON* */
-typedef struct {
+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 {
+ struct
+ {
pg_edit_t ethernet;
pg_edit_t ip4;
} ip4_over_ethernet[2];
{
/* 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].ethernet);
- _ (ip4_over_ethernet[0].ip4);
- _ (ip4_over_ethernet[1].ethernet);
- _ (ip4_over_ethernet[1].ip4);
+ _(l2_type);
+ _(l3_type);
+ _(n_l2_address_bytes);
+ _(n_l3_address_bytes);
+ _(opcode);
+ _(ip4_over_ethernet[0].ethernet);
+ _(ip4_over_ethernet[0].ip4);
+ _(ip4_over_ethernet[1].ethernet);
+ _(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;
+ 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);
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_ethernet_address, &p->ip4_over_ethernet[0].ethernet,
- unformat_pg_edit,
- unformat_ip4_address, &p->ip4_over_ethernet[0].ip4,
- unformat_pg_edit,
- unformat_ethernet_address, &p->ip4_over_ethernet[1].ethernet,
- unformat_pg_edit,
- unformat_ip4_address, &p->ip4_over_ethernet[1].ip4))
+ if (!unformat (input, "%U: %U/%U -> %U/%U",
+ unformat_pg_edit,
+ unformat_ethernet_arp_opcode_net_byte_order, &p->opcode,
+ unformat_pg_edit,
+ unformat_ethernet_address, &p->ip4_over_ethernet[0].ethernet,
+ unformat_pg_edit,
+ unformat_ip4_address, &p->ip4_over_ethernet[0].ip4,
+ unformat_pg_edit,
+ unformat_ethernet_address, &p->ip4_over_ethernet[1].ethernet,
+ 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 1;
}
-clib_error_t *ip4_set_arp_limit (u32 arp_limit)
+clib_error_t *
+ip4_set_arp_limit (u32 arp_limit)
{
- ethernet_arp_main_t * am = ðernet_arp_main;
+ ethernet_arp_main_t *am = ðernet_arp_main;
am->limit_arp_cache_size = arp_limit;
return 0;
}
-static void
-arp_ip4_entry_del_adj(ethernet_arp_ip4_entry_t *e, u32 adj_index)
+/**
+ * @brief Control Plane hook to remove an ARP entry
+ */
+int
+vnet_arp_unset_ip4_over_ethernet (vnet_main_t * vnm,
+ u32 sw_if_index, void *a_arg)
{
- int done = 0;
- int i;
+ ethernet_arp_ip4_over_ethernet_address_t *a = a_arg;
+ vnet_arp_set_ip4_over_ethernet_rpc_args_t args;
- while (!done)
- {
- vec_foreach_index(i, e->adjacencies)
- if (vec_elt(e->adjacencies, i) == adj_index)
- {
- vec_del1(e->adjacencies, i);
- continue;
- }
- done = 1;
- }
+ args.sw_if_index = sw_if_index;
+ args.flags = ETHERNET_ARP_ARGS_REMOVE;
+ args.ether_type = ARP_ETHER_TYPE_IP4;
+ clib_memcpy (&args.a, a, sizeof (*a));
+
+ vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback,
+ (u8 *) & args, sizeof (args));
+ return 0;
+}
+
+/**
+ * @brief Internally generated event to flush the ARP cache on an
+ * interface state change event.
+ * A flush will remove dynamic ARP entries, and for statics remove the MAC
+ * address from the corresponding adjacencies.
+ */
+static int
+vnet_arp_flush_ip4_over_ethernet (vnet_main_t * vnm,
+ u32 sw_if_index,
+ arp_ether_type_t et, void *a_arg)
+{
+ 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.flags = ETHERNET_ARP_ARGS_FLUSH;
+ args.ether_type = et;
+ clib_memcpy (&args.a, a, sizeof (*a));
+
+ vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback,
+ (u8 *) & args, sizeof (args));
+ return 0;
}
+/**
+ * @brief Internally generated event to populate the ARP cache on an
+ * interface state change event.
+ * For static entries this will re-source the adjacencies.
+ *
+ * @param sw_if_index The interface on which the ARP entires are acted
+ * @param et The ether type of those ARP entries.
+ */
+static int
+vnet_arp_populate_ip4_over_ethernet (vnet_main_t * vnm,
+ u32 sw_if_index,
+ arp_ether_type_t et, void *a_arg)
+{
+ 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.flags = ETHERNET_ARP_ARGS_POPULATE;
+ args.ether_type = et;
+ clib_memcpy (&args.a, a, sizeof (*a));
+
+ vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback,
+ (u8 *) & args, sizeof (args));
+ return 0;
+}
+
+/*
+ * arp_add_del_interface_address
+ *
+ * callback when an interface address is added or deleted
+ */
static void
-arp_ip4_entry_add_adj(ethernet_arp_ip4_entry_t *e, u32 adj_index)
+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)
{
- int i;
- vec_foreach_index(i, e->adjacencies)
- if (vec_elt(e->adjacencies, i) == adj_index)
- return;
- vec_add1(e->adjacencies, adj_index);
+ /*
+ * 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];
+
+ 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);}
+ }
+ ));
+
+ for (i = 0; i < vec_len (to_delete); i++)
+ {
+ ethernet_arp_ip4_over_ethernet_address_t delme;
+ e = pool_elt_at_index (am->ip4_entry_pool, to_delete[i]);
+
+ clib_memcpy (&delme.ethernet, e->ethernet_address, 6);
+ delme.ip4.as_u32 = e->ip4_address.as_u32;
+
+ vnet_arp_flush_ip4_over_ethernet (vnet_get_main (),
+ e->sw_if_index,
+ ARP_ETHER_TYPE_BOTH, &delme);
+ }
+
+ vec_free (to_delete);
+ }
}
static void
-arp_add_del_adj_cb (struct ip_lookup_main_t * lm,
- u32 adj_index,
- ip_adjacency_t * adj,
- u32 is_del)
+ethernet_arp_sw_interface_mpls_state_change (u32 sw_if_index, u32 is_enable)
{
- ethernet_arp_main_t * am = ðernet_arp_main;
- ip4_main_t * im = &ip4_main;
- ethernet_arp_ip4_key_t k;
- ethernet_arp_ip4_entry_t * e = 0;
- uword * p;
- u32 ai;
-
- for(ai = adj->heap_handle; ai < adj->heap_handle + adj->n_adj ; ai++)
+ ethernet_arp_main_t *am = ðernet_arp_main;
+ ethernet_arp_ip4_entry_t *e;
+ ethernet_arp_interface_t *eai;
+ u32 i, *to_update = 0;
+ hash_pair_t *pair;
+
+ 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];
+
+ if (is_enable)
+ eai->flags |= ETHERNET_ARP_INTERFACE_MPLS_ENABLE;
+ else
+ eai->flags &= ~ETHERNET_ARP_INTERFACE_MPLS_ENABLE;
+
+ hash_foreach_pair (pair, eai->arp_entries, (
+ {
+ vec_add1 (to_update,
+ pair->value[0]);
+ }
+ ));
+
+ for (i = 0; i < vec_len (to_update); i++)
{
- adj = ip_get_adjacency (lm, ai);
- if (adj->lookup_next_index == IP_LOOKUP_NEXT_ARP && adj->arp.next_hop.ip4.as_u32)
+ ethernet_arp_ip4_over_ethernet_address_t updateme;
+ e = pool_elt_at_index (am->ip4_entry_pool, to_update[i]);
+
+ clib_memcpy (&updateme.ethernet, e->ethernet_address, 6);
+ updateme.ip4.as_u32 = e->ip4_address.as_u32;
+
+ if (is_enable)
{
- k.sw_if_index = adj->rewrite_header.sw_if_index;
- k.ip4_address.as_u32 = adj->arp.next_hop.ip4.as_u32;
- k.fib_index = im->fib_index_by_sw_if_index[adj->rewrite_header.sw_if_index];
- p = mhash_get (&am->ip4_entry_by_key, &k);
- if (p)
- e = pool_elt_at_index (am->ip4_entry_pool, p[0]);
+ vnet_arp_populate_ip4_over_ethernet (vnet_get_main (),
+ e->sw_if_index,
+ ARP_ETHER_TYPE_MPLS,
+ &updateme);
}
else
continue;
- if (is_del)
- {
- if (!e)
- clib_warning("Adjacency contains unknown ARP next hop %U (del)",
- format_ip4_address, &adj->arp.next_hop);
- else
- arp_ip4_entry_del_adj(e, adj->heap_handle);
- }
- else /* add */
- {
- if (!e)
- clib_warning("Adjacency contains unknown ARP next hop %U (add)",
- format_ip4_address, &adj->arp.next_hop);
- else
- arp_ip4_entry_add_adj(e, adj->heap_handle);
- }
}
+ vec_free (to_update);
}
-static clib_error_t * ethernet_arp_init (vlib_main_t * vm)
+static clib_error_t *
+ethernet_arp_init (vlib_main_t * vm)
{
- ethernet_arp_main_t * am = ðernet_arp_main;
- pg_node_t * pn;
- clib_error_t * error;
- ip4_main_t * im = &ip4_main;
- ip_lookup_main_t * lm = &im->lookup_main;
+ 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;
foreach_ethernet_arp_opcode;
#undef _
- mhash_init (&am->ip4_entry_by_key,
- /* value size */ sizeof (uword),
- /* key size */ sizeof (ethernet_arp_ip4_key_t));
-
/* $$$ configurable */
am->limit_arp_cache_size = 50000;
/* don't trace ARP error packets */
{
- vlib_node_runtime_t *rt =
+ vlib_node_runtime_t *rt =
vlib_node_get_runtime (vm, arp_input_node.index);
#define _(a,b) \
#undef _
}
- ip_register_add_del_adjacency_callback(lm, arp_add_del_adj_cb);
+ 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);
+
+ vec_add1 (mpls_main.mpls_interface_state_change_callbacks,
+ ethernet_arp_sw_interface_mpls_state_change);
return 0;
}
VLIB_INIT_FUNCTION (ethernet_arp_init);
-int
-vnet_arp_unset_ip4_over_ethernet (vnet_main_t * vnm,
- u32 sw_if_index, u32 fib_index,
- void * a_arg)
+static void
+arp_mk_incomplete (ethernet_arp_interface_t * eai,
+ ethernet_arp_ip4_entry_t * e, arp_ether_type_t et)
{
- ethernet_arp_ip4_over_ethernet_address_t * a = a_arg;
- vnet_arp_set_ip4_over_ethernet_rpc_args_t args;
+ fib_prefix_t pfx = {
+ .fp_len = 32,
+ .fp_proto = FIB_PROTOCOL_IP4,
+ .fp_addr = {
+ .ip4 = e->ip4_address,
+ },
+ };
+ u32 fib_index;
- args.sw_if_index = sw_if_index;
- args.fib_index = fib_index;
- args.is_remove = 1;
- memcpy (&args.a, a, sizeof (*a));
+ fib_index = ip4_fib_table_get_index_for_sw_if_index (e->sw_if_index);
- vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback,
- (u8 *) &args, sizeof (args));
- return 0;
+ if ((ARP_ETHER_TYPE_IP4 & et) &&
+ (ADJ_INDEX_INVALID != e->adj_index[FIB_LINK_IP4]))
+ {
+ /*
+ * revert the adj this ARP entry sourced to incomplete
+ */
+ adj_nbr_update_rewrite (e->adj_index[FIB_LINK_IP4], NULL);
+
+ /*
+ * remove the FIB erntry the ARP entry sourced
+ */
+ fib_table_entry_delete (fib_index, &pfx, FIB_SOURCE_ADJ);
+
+ /*
+ * Unlock the adj now that the ARP entry is no longer a source
+ */
+ adj_unlock (e->adj_index[FIB_LINK_IP4]);
+ e->adj_index[FIB_LINK_IP4] = ADJ_INDEX_INVALID;
+ }
+ if ((ARP_ETHER_TYPE_MPLS & et) &&
+ (ADJ_INDEX_INVALID != e->adj_index[FIB_LINK_MPLS]))
+ {
+ /*
+ * revert the adj this ARP entry sourced to incomplete
+ */
+ adj_nbr_update_rewrite (e->adj_index[FIB_LINK_MPLS], NULL);
+
+ /*
+ * Unlock the adj now that the ARP entry is no longer a source
+ */
+ adj_unlock (e->adj_index[FIB_LINK_MPLS]);
+ e->adj_index[FIB_LINK_MPLS] = ADJ_INDEX_INVALID;
+ }
+}
+
+static void
+arp_entry_free (ethernet_arp_interface_t * eai, ethernet_arp_ip4_entry_t * e)
+{
+ ethernet_arp_main_t *am = ðernet_arp_main;
+
+ hash_unset (eai->arp_entries, e->ip4_address.as_u32);
+ pool_put (am->ip4_entry_pool, e);
}
-static inline int
+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 inline int
vnet_arp_unset_ip4_over_ethernet_internal (vnet_main_t * vnm,
- u32 sw_if_index,
- u32 fib_index,
- void * a_arg)
+ vnet_arp_set_ip4_over_ethernet_rpc_args_t
+ * args)
{
- ethernet_arp_ip4_entry_t * e;
- ethernet_arp_main_t * am = ðernet_arp_main;
- ethernet_arp_ip4_over_ethernet_address_t * a = a_arg;
- ethernet_arp_ip4_key_t k;
- uword * p;
- ip4_add_del_route_args_t args;
- ip4_main_t * im = &ip4_main;
- ip_lookup_main_t * lm = &im->lookup_main;
- u32 adj_index;
- ip_adjacency_t * adj;
-
- k.sw_if_index = sw_if_index;
- k.ip4_address = a->ip4;
- k.fib_index = fib_index;
- p = mhash_get (&am->ip4_entry_by_key, &k);
- if (! p)
- return -1;
-
- memset(&args, 0, sizeof(args));
-
- /*
- * Make sure that the route actually exists before we try to delete it,
- * and make sure that it's a rewrite adjacency.
- *
- * If we point 1-N unnumbered interfaces at a loopback interface and
- * shut down the loopback before shutting down 1-N unnumbered
- * interfaces, the ARP cache will still have an entry,
- * but the route will have disappeared.
- *
- * See also ip4_del_interface_routes (...)
- * -> ip4_delete_matching_routes (...).
- */
-
- adj_index = ip4_fib_lookup_with_table
- (im, fib_index, &a->ip4, 1 /* disable default route */);
-
- /* Miss adj? Forget it... */
- if (adj_index != lm->miss_adj_index) {
- adj = ip_get_adjacency (lm, adj_index);
- /*
- * Stupid control-plane trick:
- * admin down an interface (removes arp routes from fib),
- * bring the interface back up (does not reinstall them)
- * then remove the arp cache entry (yuck). When that happens,
- * the adj we find here will be the interface subnet ARP adj.
+ ethernet_arp_main_t *am = ðernet_arp_main;
+ ethernet_arp_ip4_entry_t *e;
+ ethernet_arp_interface_t *eai;
+
+ eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index];
+
+ e = arp_entry_find (eai, &args->a.ip4);
+
+ if (NULL != e)
+ {
+ arp_mk_incomplete (eai, e, ARP_ETHER_TYPE_BOTH);
+ arp_entry_free (eai, e);
+ }
+
+ return 0;
+}
+
+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;
+
+ eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index];
+
+ e = arp_entry_find (eai, &args->a.ip4);
+
+ if (NULL != e)
+ {
+ arp_mk_incomplete (eai, e, args->ether_type);
+
+ /*
+ * 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 (adj->lookup_next_index == IP_LOOKUP_NEXT_REWRITE) {
- args.table_index_or_table_id = fib_index;
- args.flags = IP4_ROUTE_FLAG_FIB_INDEX | IP4_ROUTE_FLAG_DEL
- | IP4_ROUTE_FLAG_NEIGHBOR;
- args.dst_address = a->ip4;
- args.dst_address_length = 32;
- ip4_add_del_route (im, &args);
- ip4_maybe_remap_adjacencies (im, fib_index, args.flags);
+ if ((e->flags & ETHERNET_ARP_IP4_ENTRY_FLAG_DYNAMIC) &&
+ (args->ether_type & ARP_ETHER_TYPE_IP4))
+ {
+ 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;
+
+ eai = &am->ethernet_arp_by_sw_if_index[args->sw_if_index];
+
+ e = arp_entry_find (eai, &args->a.ip4);
+
+ if (NULL != e)
+ {
+ arp_mk_complete (eai, e, args->ether_type);
+ }
+ 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 (os_get_cpu_number () == 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
+ 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_delete = 0;
+
+ /* *INDENT-OFF* */
+ pool_foreach (e, am->ip4_entry_pool,
+ ({
+ if (e->sw_if_index == sw_if_index)
+ {
+ vec_add1 (to_delete, e - am->ip4_entry_pool);
}
- }
+ }));
+ /* *INDENT-ON* */
+
+ for (i = 0; i < vec_len (to_delete); i++)
+ {
+ ethernet_arp_ip4_over_ethernet_address_t delme;
+ e = pool_elt_at_index (am->ip4_entry_pool, to_delete[i]);
+
+ clib_memcpy (&delme.ethernet, e->ethernet_address, 6);
+ delme.ip4.as_u32 = e->ip4_address.as_u32;
+
+ if (flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP)
+ {
+ vnet_arp_populate_ip4_over_ethernet (vnm, e->sw_if_index,
+ ARP_ETHER_TYPE_BOTH, &delme);
+ }
+ else
+ {
+ vnet_arp_flush_ip4_over_ethernet (vnm, e->sw_if_index,
+ ARP_ETHER_TYPE_BOTH, &delme);
+ }
+
+ }
+ vec_free (to_delete);
+
- e = pool_elt_at_index (am->ip4_entry_pool, p[0]);
- mhash_unset (&am->ip4_entry_by_key, &e->key, 0);
- pool_put (am->ip4_entry_pool, e);
return 0;
}
-static void
-increment_ip4_and_mac_address (ethernet_arp_ip4_over_ethernet_address_t *a)
+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--)
+ 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;
+ break;
}
for (i = 5; i >= 0; i--)
old = a->ethernet[i];
a->ethernet[i] += 1;
if (old < a->ethernet[i])
- break;
+ break;
}
}
-int vnet_proxy_arp_add_del (ip4_address_t *lo_addr,
- ip4_address_t *hi_addr,
- u32 fib_index, int is_del)
+int
+vnet_arp_set_ip4_over_ethernet (vnet_main_t * vnm,
+ u32 sw_if_index, void *a_arg, int is_static)
+{
+ 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.flags = 0;
+ args.ether_type = ARP_ETHER_TYPE_IP4;
+ clib_memcpy (&args.a, a, sizeof (*a));
+
+ vl_api_rpc_call_main_thread (set_ip4_over_ethernet_rpc_callback,
+ (u8 *) & args, sizeof (args));
+ 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 == lo_addr->as_u32
- && pa->hi_addr == hi_addr->as_u32
- && pa->fib_index == fib_index)
- {
- found_at_index = pa - am->proxy_arps;
- break;
- }
- }
+ {
+ if (pa->lo_addr == lo_addr->as_u32
+ && pa->hi_addr == 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);
+ vec_delete (am->proxy_arps, 1, found_at_index);
return 0;
}
/* delete, no such entry */
}
/*
- * Remove any proxy arp entries asdociated with the
+ * Remove any proxy arp entries asdociated with the
* specificed fib.
*/
-int vnet_proxy_arp_fib_reset (u32 fib_id)
+int
+vnet_proxy_arp_fib_reset (u32 fib_id)
{
- ip4_main_t * im = &ip4_main;
+ 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 *entries_to_delete = 0;
u32 fib_index;
- uword * p;
+ uword *p;
int i;
p = hash_get (im->fib_index_by_table_id, fib_id);
- if (! p)
- return VNET_API_ERROR_NO_SUCH_ENTRY;
+ if (!p)
+ return VNET_API_ERROR_NO_SUCH_ENTRY;
fib_index = p[0];
vec_foreach (pa, am->proxy_arps)
- {
- if (pa->fib_index == fib_index)
- {
- vec_add1 (entries_to_delete, pa - am->proxy_arps);
- }
- }
+ {
+ if (pa->fib_index == fib_index)
+ {
+ vec_add1 (entries_to_delete, pa - am->proxy_arps);
+ }
+ }
- for (i = 0; i < vec_len(entries_to_delete); i++)
+ for (i = 0; i < vec_len (entries_to_delete); i++)
{
- vec_delete (am->proxy_arps, 1, entries_to_delete[i]);
- }
+ vec_delete (am->proxy_arps, 1, entries_to_delete[i]);
+ }
vec_free (entries_to_delete);
- return 0;
-}
-
-u32
-vnet_arp_glean_add(u32 fib_index, void * next_hop_arg)
-{
- ethernet_arp_main_t * am = ðernet_arp_main;
- ip4_main_t * im = &ip4_main;
- ip_lookup_main_t * lm = &im->lookup_main;
- ip4_address_t * next_hop = next_hop_arg;
- ip_adjacency_t add_adj, *adj;
- ip4_add_del_route_args_t args;
- ethernet_arp_ip4_entry_t * e;
- ethernet_arp_ip4_key_t k;
- u32 adj_index;
-
- adj_index = ip4_fib_lookup_with_table(im, fib_index, next_hop, 0);
- adj = ip_get_adjacency(lm, adj_index);
-
- if (!adj || adj->lookup_next_index != IP_LOOKUP_NEXT_ARP)
- return ~0;
-
- if (adj->arp.next_hop.ip4.as_u32 != 0)
- return adj_index;
-
- k.sw_if_index = adj->rewrite_header.sw_if_index;
- k.fib_index = fib_index;
- k.ip4_address.as_u32 = next_hop->as_u32;
-
- if (mhash_get (&am->ip4_entry_by_key, &k))
- return adj_index;
-
- pool_get (am->ip4_entry_pool, e);
- mhash_set (&am->ip4_entry_by_key, &k, e - am->ip4_entry_pool, /* old value */ 0);
- e->key = k;
- e->cpu_time_last_updated = clib_cpu_time_now ();
- e->flags = ETHERNET_ARP_IP4_ENTRY_FLAG_GLEAN;
-
- memset(&args, 0, sizeof(args));
- memcpy(&add_adj, adj, sizeof(add_adj));
- add_adj.arp.next_hop.ip4.as_u32 = next_hop->as_u32; /* install neighbor /32 route */
- args.table_index_or_table_id = fib_index;
- args.flags = IP4_ROUTE_FLAG_FIB_INDEX | IP4_ROUTE_FLAG_ADD| IP4_ROUTE_FLAG_NEIGHBOR;
- args.dst_address.as_u32 = next_hop->as_u32;
- args.dst_address_length = 32;
- args.adj_index = ~0;
- args.add_adj = &add_adj;
- args.n_add_adj = 1;
- ip4_add_del_route (im, &args);
- return ip4_fib_lookup_with_table (im, fib_index, next_hop, 0);
+ return 0;
}
static clib_error_t *
ip_arp_add_del_command_fn (vlib_main_t * vm,
- unformat_input_t * input,
- vlib_cli_command_t * cmd)
+ unformat_input_t * input, vlib_cli_command_t * cmd)
{
- vnet_main_t * vnm = vnet_get_main();
+ 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_static = 0;
int is_proxy = 0;
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ 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_ethernet_address, &addr.ethernet))
- addr_valid = 1;
+ unformat_vnet_sw_interface, vnm, &sw_if_index,
+ unformat_ip4_address, &addr.ip4,
+ unformat_ethernet_address, &addr.ethernet))
+ addr_valid = 1;
else if (unformat (input, "delete") || unformat (input, "del"))
- is_del = 1;
+ is_del = 1;
else if (unformat (input, "static"))
- is_static = 1;
+ is_static = 1;
else if (unformat (input, "count %d", &count))
- ;
+ ;
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)
- 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",
- unformat_ip4_address, &lo_addr.ip4,
- unformat_ip4_address, &hi_addr.ip4))
- is_proxy = 1;
+ {
+ ip4_main_t *im = &ip4_main;
+ uword *p = hash_get (im->fib_index_by_table_id, fib_id);
+ if (!p)
+ 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",
+ unformat_ip4_address, &lo_addr.ip4,
+ unformat_ip4_address, &hi_addr.ip4))
+ is_proxy = 1;
else
- break;
+ break;
}
-
+
if (is_proxy)
{
- (void) vnet_proxy_arp_add_del (&lo_addr.ip4, &hi_addr.ip4,
- fib_index, is_del);
+ (void) vnet_proxy_arp_add_del (&lo_addr.ip4, &hi_addr.ip4,
+ fib_index, is_del);
return 0;
}
- if (addr_valid)
+ 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, fib_index, &addr, is_static);
-
- 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, fib_index, &addr);
-
- increment_ip4_and_mac_address (&addr);
- }
+ 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, is_static);
+
+ 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);
+ format_unformat_error, input);
}
-
+
return 0;
}
+
+/*?
+ * 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
+ ?*/
+/* *INDENT-OFF* */
VLIB_CLI_COMMAND (ip_arp_add_del_command, static) = {
- .path = "set ip arp",
- .short_help = "set ip arp [del] <intfc> <ip-address> <mac-address>",
- .function = ip_arp_add_del_command_fn,
+ .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>]",
+ .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)
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
{
- vnet_main_t * vnm = vnet_get_main();
+ vnet_main_t *vnm = vnet_get_main ();
u32 sw_if_index;
- vnet_sw_interface_t * si;
+ vnet_sw_interface_t *si;
int enable = 0;
int intfc_set = 0;
- while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
- if (unformat (input, "%U", unformat_vnet_sw_interface,
- vnm, &sw_if_index))
- intfc_set = 1;
+ 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;
+ enable = 1;
else if (unformat (input, "disable") || unformat (input, "off"))
- enable = 0;
+ enable = 0;
else
- break;
+ break;
}
if (intfc_set == 0)
return clib_error_return (0, "unknown input '%U'",
- format_unformat_error, input);
+ format_unformat_error, input);
si = vnet_get_sw_interface (vnm, sw_if_index);
- ASSERT(si);
+ ASSERT (si);
if (enable)
si->flags |= VNET_SW_INTERFACE_FLAG_PROXY_ARP;
- else
+ else
si->flags &= ~VNET_SW_INTERFACE_FLAG_PROXY_ARP;
-
+
return 0;
}
+
+/*?
+ * 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}
+ ?*/
+/* *INDENT-OFF* */
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,
+ .path = "set interface proxy-arp",
+ .short_help =
+ "set interface proxy-arp <intfc> [enable|disable]",
+ .function = set_int_proxy_arp_command_fn,
};
+/* *INDENT-ON* */
/*
- * ARP Termination in a L2 Bridge Domain based on an
- * IP4 to MAC hash table mac_by_ip4 for each BD.
+ * 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 {
+typedef enum
+{
ARP_TERM_NEXT_L2_OUTPUT,
ARP_TERM_NEXT_DROP,
ARP_TERM_N_NEXT,
static uword
arp_term_l2bd (vlib_main_t * vm,
- vlib_node_runtime_t * node,
- vlib_frame_t * frame)
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
{
- l2input_main_t * l2im = &l2input_main;
- u32 n_left_from, next_index, * from, * to_next;
+ 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;
+ 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;
{
u32 n_left_to_next;
- vlib_get_next_frame (vm, node, next_index,
- to_next, 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;
- u8 * l3h0;
+ 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;
+ u8 *macp0;
pi0 = from[0];
to_next[0] = pi0;
p0 = vlib_get_buffer (vm, pi0);
eth0 = vlib_buffer_get_current (p0);
- l3h0 = (u8 *)eth0 + vnet_buffer(p0)->l2.l2_len;
- ethertype0 = clib_net_to_host_u16(*(u16 *)(l3h0 - 2));
+ 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 (PREDICT_FALSE ((ethertype0 != ETHERNET_TYPE_ARP) ||
+ (arp0->opcode !=
+ clib_host_to_net_u16
+ (ETHERNET_ARP_OPCODE_request))))
+ goto check_ip6_nd;
+
+ /* Must be ARP request 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));
- memcpy (t0, l3h0, sizeof(ethernet_arp_input_trace_t));
+ u8 *t0 = vlib_add_trace (vm, node, p0,
+ sizeof (ethernet_arp_input_trace_t));
+ clib_memcpy (t0, l3h0, sizeof (ethernet_arp_input_trace_t));
}
- if (PREDICT_FALSE (
- (ethertype0 != ETHERNET_TYPE_ARP) ||
- (arp0->opcode != clib_host_to_net_u16(ETHERNET_ARP_OPCODE_request))))
- goto next_l2_feature;
-
error0 = ETHERNET_ARP_ERROR_replies_sent;
- 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 =
+ (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 their L2-frame-level source addresses */
- if (PREDICT_FALSE (
- memcmp (eth0->src_address, arp0->ip4_over_ethernet[0].ethernet,
- sizeof (eth0->src_address))))
- {
- 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 && (vnet_buffer(p0)->l2.shg == 0))
- { // Only SHG 0 interface which is more likely local
- 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;
- }
+ /* Trash ARP packets whose ARP-level source addresses do not
+ match their L2-frame-level source addresses */
+ if (PREDICT_FALSE
+ (memcmp
+ (eth0->src_address, arp0->ip4_over_ethernet[0].ethernet,
+ sizeof (eth0->src_address))))
+ {
+ 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 && (vnet_buffer (p0)->l2.shg == 0))
+ { // Only SHG 0 interface which is more likely local
+ 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;
+ }
+ }
}
- // lookup BD mac_by_ip4 hash table for MAC entry
+ /* 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)))
+ 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);
+ 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 (!macp0))
+ goto next_l2_feature; /* MAC not found */
- // MAC found, send ARP reply -
- // Convert ARP request packet to ARP reply
+ /* 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;
- memcpy (arp0->ip4_over_ethernet[0].ethernet, macp0, 6);
- memcpy (eth0->dst_address, eth0->src_address, 6);
- memcpy (eth0->src_address, macp0, 6);
+ clib_memcpy (arp0->ip4_over_ethernet[0].ethernet, macp0, 6);
+ clib_memcpy (eth0->dst_address, eth0->src_address, 6);
+ clib_memcpy (eth0->src_address, macp0, 6);
n_replies_sent += 1;
- // 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);
+ 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)->l2.feature_bitmap |= L2INPUT_FEAT_FWD;
vnet_buffer (p0)->sw_if_index[VLIB_RX] = 0;
goto next_l2_feature;
}
- // Send ARP reply back out input interface through l2-output
+ /* 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);
+ /* 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);
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_link_local_unicast
+ (&iph0->src_address)
+ &&
+ !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,
+ vnet_buffer (p0)->l2.shg))
+ goto output_response;
+ }
+
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);
- vlib_validate_buffer_enqueue_x1 (vm, node, next_index,to_next,
- n_left_to_next,pi0,next0);
+ 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);
+ 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;
- }
+ 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_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);
+ ETHERNET_ARP_ERROR_replies_sent, n_replies_sent);
return frame->n_vectors;
}
-VLIB_REGISTER_NODE (arp_term_l2bd_node,static) = {
+/* *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_ethernet_arp_input_trace,
+ .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);
+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)
+ {
+
+ if (ADJ_INDEX_INVALID != e->adj_index[FIB_LINK_IP4])
+ {
+ // the update rewrite function takes the dst mac (which is not changing)
+ // the new source mac will be retrieved from the interface
+ // when the full rewrite is constructed.
+ adj_nbr_update_rewrite (e->adj_index[FIB_LINK_IP4],
+ e->ethernet_address);
+ }
+ if (ADJ_INDEX_INVALID != e->adj_index[FIB_LINK_MPLS])
+ {
+ adj_nbr_update_rewrite (e->adj_index[FIB_LINK_MPLS],
+ e->ethernet_address);
+ }
+
+ }
+}
+
+void
+ethernet_arp_change_mac (vnet_main_t * vnm, u32 sw_if_index)
+{
+ ethernet_arp_main_t *am = ðernet_arp_main;
+ ethernet_arp_ip4_entry_t *e;
+
+ /* *INDENT-OFF* */
+ pool_foreach (e, am->ip4_entry_pool,
+ ({
+ change_arp_mac (sw_if_index, e);
+ }));
+ /* *INDENT-ON* */
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff