}
else
{
- s = format (s, "VXLAN decap error - tunnel for vni %d does not exist",
+ s = format (s, "VXLAN decap error - tunnel for vni %d does not exist",
t->vni);
}
return s;
always_inline u32
validate_vxlan_fib (vlib_buffer_t *b, vxlan_tunnel_t *t, u32 is_ip4)
{
- u32 fib_index, sw_if_index;
+ u32 sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
- sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
+ u32 * fib_index_by_sw_if_index = is_ip4 ?
+ ip4_main.fib_index_by_sw_if_index : ip6_main.fib_index_by_sw_if_index;
+ u32 tx_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_TX];
+ u32 fib_index = (tx_sw_if_index == (u32) ~ 0) ?
+ vec_elt (fib_index_by_sw_if_index, sw_if_index) : tx_sw_if_index;
- if (is_ip4)
- fib_index = (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
- vec_elt (ip4_main.fib_index_by_sw_if_index, sw_if_index) :
- vnet_buffer (b)->sw_if_index[VLIB_TX];
+ return (fib_index == t->encap_fib_index);
+}
+
+typedef struct
+{
+ vxlan4_tunnel_key_t key4;
+ u32 tunnel_index;
+}last_tunnel_cache4;
+
+typedef struct
+{
+ vxlan6_tunnel_key_t key6;
+ u32 tunnel_index;
+}last_tunnel_cache6;
+
+always_inline vxlan_tunnel_t *
+vxlan4_find_tunnel (vxlan_main_t * vxm, last_tunnel_cache4 * cache,
+ ip4_header_t * ip4_0, vxlan_header_t * vxlan0,
+ vxlan_tunnel_t ** stats_t0)
+{
+ /* Make sure VXLAN tunnel exist according to packet SIP and VNI */
+ vxlan4_tunnel_key_t key4_0 = {
+ .src = ip4_0->src_address.as_u32,
+ .vni = vxlan0->vni_reserved,
+ };
+
+ if (PREDICT_FALSE (key4_0.as_u64 != cache->key4.as_u64))
+ {
+ uword * p = hash_get (vxm->vxlan4_tunnel_by_key, key4_0.as_u64);
+ if (PREDICT_FALSE (p == 0))
+ return 0;
+
+ cache->key4 = key4_0;
+ cache->tunnel_index = p[0];
+ }
+ vxlan_tunnel_t * t0 = pool_elt_at_index (vxm->tunnels, cache->tunnel_index);
+
+ /* Validate VXLAN tunnel SIP against packet DIP */
+ if (PREDICT_TRUE (ip4_0->dst_address.as_u32 == t0->src.ip4.as_u32))
+ *stats_t0 = t0;
else
- fib_index = (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ?
- vec_elt (ip6_main.fib_index_by_sw_if_index, sw_if_index) :
- vnet_buffer (b)->sw_if_index[VLIB_TX];
+ {
+ /* try multicast */
+ if (PREDICT_TRUE (!ip4_address_is_multicast (&ip4_0->dst_address)))
+ return 0;
+
+ key4_0.src = ip4_0->dst_address.as_u32;
+ /* Make sure mcast VXLAN tunnel exist by packet DIP and VNI */
+ uword * p = hash_get (vxm->vxlan4_tunnel_by_key, key4_0.as_u64);
+ if (PREDICT_FALSE (p == NULL))
+ return 0;
+ *stats_t0 = pool_elt_at_index (vxm->tunnels, p[0]);
+ }
+
+ return t0;
+}
- return (fib_index == t->encap_fib_index);
+always_inline vxlan_tunnel_t *
+vxlan6_find_tunnel (vxlan_main_t * vxm, last_tunnel_cache6 * cache,
+ ip6_header_t * ip6_0, vxlan_header_t * vxlan0,
+ vxlan_tunnel_t ** stats_t0)
+{
+ /* Make sure VXLAN tunnel exist according to packet SIP and VNI */
+ vxlan6_tunnel_key_t key6_0 = {
+ .src = ip6_0->src_address,
+ .vni = vxlan0->vni_reserved,
+ };
+
+ if (PREDICT_FALSE (memcmp(&key6_0, &cache->key6, sizeof key6_0) != 0))
+ {
+ uword * p = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6_0);
+ if (PREDICT_FALSE (p == NULL))
+ return 0;
+
+ cache->key6 = key6_0;
+ cache->tunnel_index = p[0];
+ }
+ vxlan_tunnel_t * t0 = pool_elt_at_index (vxm->tunnels, cache->tunnel_index);
+
+ /* Validate VXLAN tunnel SIP against packet DIP */
+ if (PREDICT_TRUE (ip6_address_is_equal (&ip6_0->dst_address, &t0->src.ip6)))
+ *stats_t0 = t0;
+ else
+ {
+ /* try multicast */
+ if (PREDICT_TRUE (!ip6_address_is_multicast (&ip6_0->dst_address)))
+ return 0;
+
+ key6_0.src = ip6_0->dst_address;
+ /* Make sure mcast VXLAN tunnel exist by packet DIP and VNI */
+ uword * p = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6_0);
+ if (PREDICT_FALSE (p == NULL))
+ return 0;
+ *stats_t0 = pool_elt_at_index (vxm->tunnels, p[0]);
+ }
+
+ return t0;
}
always_inline uword
vlib_frame_t * from_frame,
u32 is_ip4)
{
- u32 n_left_from, next_index, * from, * to_next;
vxlan_main_t * vxm = &vxlan_main;
vnet_main_t * vnm = vxm->vnet_main;
vnet_interface_main_t * im = &vnm->interface_main;
- u32 last_tunnel_index = ~0;
- vxlan4_tunnel_key_t last_key4;
- vxlan6_tunnel_key_t last_key6;
+ vlib_combined_counter_main_t * rx_counter = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX;
+ vlib_combined_counter_main_t * drop_counter = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_DROP;
+ last_tunnel_cache4 last4 = { .tunnel_index = ~0 };
+ last_tunnel_cache6 last6 = { .tunnel_index = ~0 };
u32 pkts_decapsulated = 0;
- u32 cpu_index = os_get_cpu_number();
- u32 stats_sw_if_index, stats_n_packets, stats_n_bytes;
+ u32 thread_index = vlib_get_thread_index();
if (is_ip4)
- last_key4.as_u64 = ~0;
+ last4.key4.as_u64 = ~0;
else
- memset (&last_key6, 0xff, sizeof (last_key6));
+ memset (&last6.key6, 0xff, sizeof last6.key6);
- from = vlib_frame_vector_args (from_frame);
- n_left_from = from_frame->n_vectors;
+ u32 next_index = node->cached_next_index;
- next_index = node->cached_next_index;
- stats_sw_if_index = node->runtime_data[0];
- stats_n_packets = stats_n_bytes = 0;
+ u32 * from = vlib_frame_vector_args (from_frame);
+ u32 n_left_from = from_frame->n_vectors;
while (n_left_from > 0)
{
- u32 n_left_to_next;
+ u32 * to_next, 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 >= 4 && n_left_to_next >= 2)
{
- u32 bi0, bi1;
- vlib_buffer_t * b0, * b1;
- u32 next0, next1;
- ip4_header_t * ip4_0, * ip4_1;
- ip6_header_t * ip6_0, * ip6_1;
- vxlan_header_t * vxlan0, * vxlan1;
- uword * p0, * p1;
- u32 tunnel_index0, tunnel_index1;
- vxlan_tunnel_t * t0, * t1, * mt0 = NULL, * mt1 = NULL;
- vxlan4_tunnel_key_t key4_0, key4_1;
- vxlan6_tunnel_key_t key6_0, key6_1;
- u32 error0, error1;
- u32 sw_if_index0, sw_if_index1, len0, len1;
-
/* Prefetch next iteration. */
{
vlib_buffer_t * p2, * p3;
CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
}
- bi0 = from[0];
- bi1 = from[1];
- to_next[0] = bi0;
- to_next[1] = bi1;
+ u32 bi0 = to_next[0] = from[0];
+ u32 bi1 = to_next[1] = from[1];
from += 2;
to_next += 2;
n_left_to_next -= 2;
n_left_from -= 2;
+ vlib_buffer_t * b0, * b1;
b0 = vlib_get_buffer (vm, bi0);
b1 = vlib_get_buffer (vm, bi1);
/* udp leaves current_data pointing at the vxlan header */
- vxlan0 = vlib_buffer_get_current (b0);
- vxlan1 = vlib_buffer_get_current (b1);
+ void * cur0 = vlib_buffer_get_current (b0);
+ void * cur1 = vlib_buffer_get_current (b1);
+ vxlan_header_t * vxlan0 = cur0;
+ vxlan_header_t * vxlan1 = cur1;
+
+ ip4_header_t * ip4_0, * ip4_1;
+ ip6_header_t * ip6_0, * ip6_1;
if (is_ip4) {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t)));
- vlib_buffer_advance
- (b1, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t)));
- ip4_0 = vlib_buffer_get_current (b0);
- ip4_1 = vlib_buffer_get_current (b1);
+ ip4_0 = cur0 - sizeof(udp_header_t) - sizeof(ip4_header_t);
+ ip4_1 = cur1 - sizeof(udp_header_t) - sizeof(ip4_header_t);
} else {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip6_header_t)));
- vlib_buffer_advance
- (b1, -(word)(sizeof(udp_header_t)+sizeof(ip6_header_t)));
- ip6_0 = vlib_buffer_get_current (b0);
- ip6_1 = vlib_buffer_get_current (b1);
+ ip6_0 = cur0 - sizeof(udp_header_t) - sizeof(ip6_header_t);
+ ip6_1 = cur1 - sizeof(udp_header_t) - sizeof(ip6_header_t);
}
- /* pop (ip, udp, vxlan) */
- if (is_ip4) {
- vlib_buffer_advance
- (b0, sizeof(*ip4_0)+sizeof(udp_header_t)+sizeof(*vxlan0));
- vlib_buffer_advance
- (b1, sizeof(*ip4_1)+sizeof(udp_header_t)+sizeof(*vxlan1));
- } else {
- vlib_buffer_advance
- (b0, sizeof(*ip6_0)+sizeof(udp_header_t)+sizeof(*vxlan0));
- vlib_buffer_advance
- (b1, sizeof(*ip6_1)+sizeof(udp_header_t)+sizeof(*vxlan1));
- }
+ /* pop vxlan */
+ vlib_buffer_advance (b0, sizeof *vxlan0);
+ vlib_buffer_advance (b1, sizeof *vxlan1);
- tunnel_index0 = ~0;
- error0 = 0;
+ vxlan_tunnel_t * t0, * stats_t0;
+ vxlan_tunnel_t * t1, * stats_t1;
+ if (is_ip4)
+ {
+ t0 = vxlan4_find_tunnel (vxm, &last4, ip4_0, vxlan0, &stats_t0);
+ t1 = vxlan4_find_tunnel (vxm, &last4, ip4_1, vxlan1, &stats_t1);
+ }
+ else
+ {
+ t0 = vxlan6_find_tunnel (vxm, &last6, ip6_0, vxlan0, &stats_t0);
+ t1 = vxlan6_find_tunnel (vxm, &last6, ip6_1, vxlan1, &stats_t1);
+ }
- tunnel_index1 = ~0;
- error1 = 0;
+ u32 len0 = vlib_buffer_length_in_chain (vm, b0);
+ u32 len1 = vlib_buffer_length_in_chain (vm, b1);
- if (PREDICT_FALSE (vxlan0->flags != VXLAN_FLAGS_I))
- {
- error0 = VXLAN_ERROR_BAD_FLAGS;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
- }
-
- if (is_ip4) {
- key4_0.src = ip4_0->src_address.as_u32;
- key4_0.vni = vxlan0->vni_reserved;
-
- /* Make sure VXLAN tunnel exist according to packet SIP and VNI */
- if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64))
- {
- p0 = hash_get (vxm->vxlan4_tunnel_by_key, key4_0.as_u64);
- if (PREDICT_FALSE (p0 == NULL))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
- }
- last_key4.as_u64 = key4_0.as_u64;
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
- t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0);
-
- /* Validate VXLAN tunnel encap-fib index agaist packet */
- if (PREDICT_FALSE (validate_vxlan_fib (b0, t0, is_ip4) == 0))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
- }
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip4_0->dst_address.as_u32 == t0->src.ip4.as_u32))
- goto next0; /* valid packet */
- if (PREDICT_FALSE (ip4_address_is_multicast (&ip4_0->dst_address)))
- {
- key4_0.src = ip4_0->dst_address.as_u32;
- key4_0.vni = vxlan0->vni_reserved;
- /* Make sure mcast VXLAN tunnel exist by packet DIP and VNI */
- p0 = hash_get (vxm->vxlan4_tunnel_by_key, key4_0.as_u64);
- if (PREDICT_TRUE (p0 != NULL))
- {
- mt0 = pool_elt_at_index (vxm->tunnels, p0[0]);
- goto next0; /* valid packet */
- }
- }
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
-
- } else /* !is_ip4 */ {
- key6_0.src.as_u64[0] = ip6_0->src_address.as_u64[0];
- key6_0.src.as_u64[1] = ip6_0->src_address.as_u64[1];
- key6_0.vni = vxlan0->vni_reserved;
-
- /* Make sure VXLAN tunnel exist according to packet SIP and VNI */
- if (PREDICT_FALSE (memcmp(&key6_0, &last_key6, sizeof(last_key6)) != 0))
- {
- p0 = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6_0);
- if (PREDICT_FALSE (p0 == NULL))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
- }
- clib_memcpy (&last_key6, &key6_0, sizeof(key6_0));
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
- t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0);
-
- /* Validate VXLAN tunnel encap-fib index agaist packet */
- if (PREDICT_FALSE (validate_vxlan_fib (b0, t0, is_ip4) == 0))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
- }
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip6_address_is_equal (&ip6_0->dst_address,
- &t0->src.ip6)))
- goto next0; /* valid packet */
- if (PREDICT_FALSE (ip6_address_is_multicast (&ip6_0->dst_address)))
- {
- key6_0.src.as_u64[0] = ip6_0->dst_address.as_u64[0];
- key6_0.src.as_u64[1] = ip6_0->dst_address.as_u64[1];
- key6_0.vni = vxlan0->vni_reserved;
- p0 = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6_0);
- if (PREDICT_TRUE (p0 != NULL))
- {
- mt0 = pool_elt_at_index (vxm->tunnels, p0[0]);
- goto next0; /* valid packet */
- }
- }
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace0;
- }
+ u32 next0, next1;
+ u8 error0 = 0, error1 = 0;
+ /* Validate VXLAN tunnel encap-fib index agaist packet */
+ if (PREDICT_FALSE (t0 == 0 || validate_vxlan_fib (b0, t0, is_ip4) == 0 ||
+ vxlan0->flags != VXLAN_FLAGS_I))
+ {
+ next0 = VXLAN_INPUT_NEXT_DROP;
+
+ if (t0 != 0 && vxlan0->flags != VXLAN_FLAGS_I)
+ {
+ error0 = VXLAN_ERROR_BAD_FLAGS;
+ vlib_increment_combined_counter
+ (drop_counter, thread_index, stats_t0->sw_if_index, 1, len0);
+ }
+ else
+ error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
+ b0->error = node->errors[error0];
+ }
+ else
+ {
+ next0 = t0->decap_next_index;
- next0:
- next0 = t0->decap_next_index;
- sw_if_index0 = t0->sw_if_index;
- len0 = vlib_buffer_length_in_chain (vm, b0);
+ /* Required to make the l2 tag push / pop code work on l2 subifs */
+ if (PREDICT_TRUE(next0 == VXLAN_INPUT_NEXT_L2_INPUT))
+ vnet_update_l2_len (b0);
- /* Required to make the l2 tag push / pop code work on l2 subifs */
- if (PREDICT_TRUE(next0 == VXLAN_INPUT_NEXT_L2_INPUT))
- vnet_update_l2_len (b0);
+ /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
+ vnet_buffer(b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
+ vlib_increment_combined_counter
+ (rx_counter, thread_index, stats_t0->sw_if_index, 1, len0);
+ pkts_decapsulated++;
+ }
- /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
- vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0;
- sw_if_index0 = (mt0) ? mt0->sw_if_index : sw_if_index0;
+ /* Validate VXLAN tunnel encap-fib index agaist packet */
+ if (PREDICT_FALSE (t1 == 0 || validate_vxlan_fib (b1, t1, is_ip4) == 0 ||
+ vxlan1->flags != VXLAN_FLAGS_I))
+ {
+ next1 = VXLAN_INPUT_NEXT_DROP;
+
+ if (t1 != 0 && vxlan1->flags != VXLAN_FLAGS_I)
+ {
+ error1 = VXLAN_ERROR_BAD_FLAGS;
+ vlib_increment_combined_counter
+ (drop_counter, thread_index, stats_t1->sw_if_index, 1, len1);
+ }
+ else
+ error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
+ b1->error = node->errors[error1];
+ }
+ else
+ {
+ next1 = t1->decap_next_index;
- pkts_decapsulated ++;
- stats_n_packets += 1;
- stats_n_bytes += len0;
+ /* Required to make the l2 tag push / pop code work on l2 subifs */
+ if (PREDICT_TRUE(next1 == VXLAN_INPUT_NEXT_L2_INPUT))
+ vnet_update_l2_len (b1);
- /* Batch stats increment on the same vxlan tunnel so counter
- is not incremented per packet */
- if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
- {
- stats_n_packets -= 1;
- stats_n_bytes -= len0;
- if (stats_n_packets)
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
- cpu_index, stats_sw_if_index,
- stats_n_packets, stats_n_bytes);
- stats_n_packets = 1;
- stats_n_bytes = len0;
- stats_sw_if_index = sw_if_index0;
- }
+ /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
+ vnet_buffer(b1)->sw_if_index[VLIB_RX] = t1->sw_if_index;
+ pkts_decapsulated++;
- trace0:
- b0->error = error0 ? node->errors[error0] : 0;
+ vlib_increment_combined_counter
+ (rx_counter, thread_index, stats_t1->sw_if_index, 1, len1);
+ }
- if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
{
- vxlan_rx_trace_t *tr
- = vlib_add_trace (vm, node, b0, sizeof (*tr));
+ vxlan_rx_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
tr->next_index = next0;
tr->error = error0;
- tr->tunnel_index = tunnel_index0;
+ tr->tunnel_index = t0 == 0 ? ~0 : t0 - vxm->tunnels;
tr->vni = vnet_get_vni (vxlan0);
}
-
- if (PREDICT_FALSE (vxlan1->flags != VXLAN_FLAGS_I))
- {
- error1 = VXLAN_ERROR_BAD_FLAGS;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
- }
-
- if (is_ip4) {
- key4_1.src = ip4_1->src_address.as_u32;
- key4_1.vni = vxlan1->vni_reserved;
-
- /* Make sure unicast VXLAN tunnel exist by packet SIP and VNI */
- if (PREDICT_FALSE (key4_1.as_u64 != last_key4.as_u64))
- {
- p1 = hash_get (vxm->vxlan4_tunnel_by_key, key4_1.as_u64);
- if (PREDICT_FALSE (p1 == NULL))
- {
- error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
- }
- last_key4.as_u64 = key4_1.as_u64;
- tunnel_index1 = last_tunnel_index = p1[0];
- }
- else
- tunnel_index1 = last_tunnel_index;
- t1 = pool_elt_at_index (vxm->tunnels, tunnel_index1);
-
- /* Validate VXLAN tunnel encap-fib index agaist packet */
- if (PREDICT_FALSE (validate_vxlan_fib (b1, t1, is_ip4) == 0))
- {
- error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
- }
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip4_1->dst_address.as_u32 == t1->src.ip4.as_u32))
- goto next1; /* valid packet */
- if (PREDICT_FALSE (ip4_address_is_multicast (&ip4_1->dst_address)))
- {
- key4_1.src = ip4_1->dst_address.as_u32;
- key4_1.vni = vxlan1->vni_reserved;
- /* Make sure mcast VXLAN tunnel exist by packet DIP and VNI */
- p1 = hash_get (vxm->vxlan4_tunnel_by_key, key4_1.as_u64);
- if (PREDICT_TRUE (p1 != NULL))
- {
- mt1 = pool_elt_at_index (vxm->tunnels, p1[0]);
- goto next1; /* valid packet */
- }
- }
- error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
-
- } else /* !is_ip4 */ {
- key6_1.src.as_u64[0] = ip6_1->src_address.as_u64[0];
- key6_1.src.as_u64[1] = ip6_1->src_address.as_u64[1];
- key6_1.vni = vxlan1->vni_reserved;
-
- /* Make sure VXLAN tunnel exist according to packet SIP and VNI */
- if (PREDICT_FALSE (memcmp(&key6_1, &last_key6, sizeof(last_key6)) != 0))
- {
- p1 = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6_1);
-
- if (PREDICT_FALSE (p1 == NULL))
- {
- error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
- }
-
- clib_memcpy (&last_key6, &key6_1, sizeof(key6_1));
- tunnel_index1 = last_tunnel_index = p1[0];
- }
- else
- tunnel_index1 = last_tunnel_index;
- t1 = pool_elt_at_index (vxm->tunnels, tunnel_index1);
-
- /* Validate VXLAN tunnel encap-fib index agaist packet */
- if (PREDICT_FALSE (validate_vxlan_fib (b1, t1, is_ip4) == 0))
- {
- error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
- }
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip6_address_is_equal (&ip6_1->dst_address,
- &t1->src.ip6)))
- goto next1; /* valid packet */
- if (PREDICT_FALSE (ip6_address_is_multicast (&ip6_1->dst_address)))
- {
- key6_1.src.as_u64[0] = ip6_1->dst_address.as_u64[0];
- key6_1.src.as_u64[1] = ip6_1->dst_address.as_u64[1];
- key6_1.vni = vxlan1->vni_reserved;
- p1 = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6_1);
- if (PREDICT_TRUE (p1 != NULL))
- {
- mt1 = pool_elt_at_index (vxm->tunnels, p1[0]);
- goto next1; /* valid packet */
- }
- }
- error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next1 = VXLAN_INPUT_NEXT_DROP;
- goto trace1;
- }
-
- next1:
- next1 = t1->decap_next_index;
- sw_if_index1 = t1->sw_if_index;
- len1 = vlib_buffer_length_in_chain (vm, b1);
-
- /* Required to make the l2 tag push / pop code work on l2 subifs */
- if (PREDICT_TRUE(next1 == VXLAN_INPUT_NEXT_L2_INPUT))
- vnet_update_l2_len (b1);
-
- /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
- vnet_buffer(b1)->sw_if_index[VLIB_RX] = sw_if_index1;
- sw_if_index1 = (mt1) ? mt1->sw_if_index : sw_if_index1;
-
- pkts_decapsulated ++;
- stats_n_packets += 1;
- stats_n_bytes += len1;
-
- /* Batch stats increment on the same vxlan tunnel so counter
- is not incremented per packet */
- if (PREDICT_FALSE (sw_if_index1 != stats_sw_if_index))
- {
- stats_n_packets -= 1;
- stats_n_bytes -= len1;
- if (stats_n_packets)
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
- cpu_index, stats_sw_if_index,
- stats_n_packets, stats_n_bytes);
- stats_n_packets = 1;
- stats_n_bytes = len1;
- stats_sw_if_index = sw_if_index1;
- }
-
- trace1:
- b1->error = error1 ? node->errors[error1] : 0;
-
- if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
+ if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
{
- vxlan_rx_trace_t *tr
- = vlib_add_trace (vm, node, b1, sizeof (*tr));
+ vxlan_rx_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof (*tr));
tr->next_index = next1;
tr->error = error1;
- tr->tunnel_index = tunnel_index1;
+ tr->tunnel_index = t1 == 0 ? ~0 : t1 - vxm->tunnels;
tr->vni = vnet_get_vni (vxlan1);
}
while (n_left_from > 0 && n_left_to_next > 0)
{
- u32 bi0;
- vlib_buffer_t * b0;
- u32 next0;
- ip4_header_t * ip4_0;
- ip6_header_t * ip6_0;
- vxlan_header_t * vxlan0;
- uword * p0;
- u32 tunnel_index0;
- vxlan_tunnel_t * t0, * mt0 = NULL;
- vxlan4_tunnel_key_t key4_0;
- vxlan6_tunnel_key_t key6_0;
- u32 error0;
- u32 sw_if_index0, len0;
-
- bi0 = from[0];
- to_next[0] = bi0;
+ u32 bi0 = to_next[0] = from[0];
from += 1;
to_next += 1;
n_left_from -= 1;
n_left_to_next -= 1;
- b0 = vlib_get_buffer (vm, bi0);
+ vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
/* udp leaves current_data pointing at the vxlan header */
- vxlan0 = vlib_buffer_get_current (b0);
- if (is_ip4) {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t)));
- ip4_0 = vlib_buffer_get_current (b0);
- } else {
- vlib_buffer_advance
- (b0, -(word)(sizeof(udp_header_t)+sizeof(ip6_header_t)));
- ip6_0 = vlib_buffer_get_current (b0);
- }
+ void * cur0 = vlib_buffer_get_current (b0);
+ vxlan_header_t * vxlan0 = cur0;
+ ip4_header_t * ip4_0;
+ ip6_header_t * ip6_0;
+ if (is_ip4)
+ ip4_0 = cur0 -sizeof(udp_header_t) - sizeof(ip4_header_t);
+ else
+ ip6_0 = cur0 -sizeof(udp_header_t) - sizeof(ip6_header_t);
/* pop (ip, udp, vxlan) */
- if (is_ip4) {
- vlib_buffer_advance
- (b0, sizeof(*ip4_0)+sizeof(udp_header_t)+sizeof(*vxlan0));
- } else {
- vlib_buffer_advance
- (b0, sizeof(*ip6_0)+sizeof(udp_header_t)+sizeof(*vxlan0));
- }
-
- tunnel_index0 = ~0;
- error0 = 0;
-
- if (PREDICT_FALSE (vxlan0->flags != VXLAN_FLAGS_I))
- {
- error0 = VXLAN_ERROR_BAD_FLAGS;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
- }
+ vlib_buffer_advance (b0, sizeof(*vxlan0));
- if (is_ip4) {
- key4_0.src = ip4_0->src_address.as_u32;
- key4_0.vni = vxlan0->vni_reserved;
-
- /* Make sure unicast VXLAN tunnel exist by packet SIP and VNI */
- if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64))
- {
- p0 = hash_get (vxm->vxlan4_tunnel_by_key, key4_0.as_u64);
- if (PREDICT_FALSE (p0 == NULL))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
- }
- last_key4.as_u64 = key4_0.as_u64;
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
- t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0);
-
- /* Validate VXLAN tunnel encap-fib index agaist packet */
- if (PREDICT_FALSE (validate_vxlan_fib (b0, t0, is_ip4) == 0))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
- }
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip4_0->dst_address.as_u32 == t0->src.ip4.as_u32))
- goto next00; /* valid packet */
- if (PREDICT_FALSE (ip4_address_is_multicast (&ip4_0->dst_address)))
- {
- key4_0.src = ip4_0->dst_address.as_u32;
- key4_0.vni = vxlan0->vni_reserved;
- /* Make sure mcast VXLAN tunnel exist by packet DIP and VNI */
- p0 = hash_get (vxm->vxlan4_tunnel_by_key, key4_0.as_u64);
- if (PREDICT_TRUE (p0 != NULL))
- {
- mt0 = pool_elt_at_index (vxm->tunnels, p0[0]);
- goto next00; /* valid packet */
- }
- }
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
-
- } else /* !is_ip4 */ {
- key6_0.src.as_u64[0] = ip6_0->src_address.as_u64[0];
- key6_0.src.as_u64[1] = ip6_0->src_address.as_u64[1];
- key6_0.vni = vxlan0->vni_reserved;
-
- /* Make sure VXLAN tunnel exist according to packet SIP and VNI */
- if (PREDICT_FALSE (memcmp(&key6_0, &last_key6, sizeof(last_key6)) != 0))
- {
- p0 = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6_0);
- if (PREDICT_FALSE (p0 == NULL))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
- }
- clib_memcpy (&last_key6, &key6_0, sizeof(key6_0));
- tunnel_index0 = last_tunnel_index = p0[0];
- }
- else
- tunnel_index0 = last_tunnel_index;
- t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0);
-
- /* Validate VXLAN tunnel encap-fib index agaist packet */
- if (PREDICT_FALSE (validate_vxlan_fib (b0, t0, is_ip4) == 0))
- {
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
- }
-
- /* Validate VXLAN tunnel SIP against packet DIP */
- if (PREDICT_TRUE (ip6_address_is_equal (&ip6_0->dst_address,
- &t0->src.ip6)))
- goto next00; /* valid packet */
- if (PREDICT_FALSE (ip6_address_is_multicast (&ip6_0->dst_address)))
- {
- key6_0.src.as_u64[0] = ip6_0->dst_address.as_u64[0];
- key6_0.src.as_u64[1] = ip6_0->dst_address.as_u64[1];
- key6_0.vni = vxlan0->vni_reserved;
- p0 = hash_get_mem (vxm->vxlan6_tunnel_by_key, &key6_0);
- if (PREDICT_TRUE (p0 != NULL))
- {
- mt0 = pool_elt_at_index (vxm->tunnels, p0[0]);
- goto next00; /* valid packet */
- }
- }
- error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
- next0 = VXLAN_INPUT_NEXT_DROP;
- goto trace00;
- }
-
- next00:
- next0 = t0->decap_next_index;
- sw_if_index0 = t0->sw_if_index;
- len0 = vlib_buffer_length_in_chain (vm, b0);
+ vxlan_tunnel_t * t0, * stats_t0;
+ if (is_ip4)
+ t0 = vxlan4_find_tunnel (vxm, &last4, ip4_0, vxlan0, &stats_t0);
+ else
+ t0 = vxlan6_find_tunnel (vxm, &last6, ip6_0, vxlan0, &stats_t0);
- /* Required to make the l2 tag push / pop code work on l2 subifs */
- if (PREDICT_TRUE(next0 == VXLAN_INPUT_NEXT_L2_INPUT))
- vnet_update_l2_len (b0);
+ uword len0 = vlib_buffer_length_in_chain (vm, b0);
- /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
- vnet_buffer(b0)->sw_if_index[VLIB_RX] = sw_if_index0;
- sw_if_index0 = (mt0) ? mt0->sw_if_index : sw_if_index0;
+ u32 next0;
+ u8 error0 = 0;
+ /* Validate VXLAN tunnel encap-fib index agaist packet */
+ if (PREDICT_FALSE (t0 == 0 || validate_vxlan_fib (b0, t0, is_ip4) == 0 ||
+ vxlan0->flags != VXLAN_FLAGS_I))
+ {
+ next0 = VXLAN_INPUT_NEXT_DROP;
+
+ if (t0 != 0 && vxlan0->flags != VXLAN_FLAGS_I)
+ {
+ error0 = VXLAN_ERROR_BAD_FLAGS;
+ vlib_increment_combined_counter
+ (drop_counter, thread_index, stats_t0->sw_if_index, 1, len0);
+ }
+ else
+ error0 = VXLAN_ERROR_NO_SUCH_TUNNEL;
+ b0->error = node->errors[error0];
+ }
+ else
+ {
+ next0 = t0->decap_next_index;
- pkts_decapsulated ++;
- stats_n_packets += 1;
- stats_n_bytes += len0;
+ /* Required to make the l2 tag push / pop code work on l2 subifs */
+ if (PREDICT_TRUE(next0 == VXLAN_INPUT_NEXT_L2_INPUT))
+ vnet_update_l2_len (b0);
- /* Batch stats increment on the same vxlan tunnel so counter
- is not incremented per packet */
- if (PREDICT_FALSE (sw_if_index0 != stats_sw_if_index))
- {
- stats_n_packets -= 1;
- stats_n_bytes -= len0;
- if (stats_n_packets)
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
- cpu_index, stats_sw_if_index,
- stats_n_packets, stats_n_bytes);
- stats_n_packets = 1;
- stats_n_bytes = len0;
- stats_sw_if_index = sw_if_index0;
- }
+ /* Set packet input sw_if_index to unicast VXLAN tunnel for learning */
+ vnet_buffer(b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
+ pkts_decapsulated++;
- trace00:
- b0->error = error0 ? node->errors[error0] : 0;
+ vlib_increment_combined_counter
+ (rx_counter, thread_index, stats_t0->sw_if_index, 1, len0);
+ }
- if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
{
- vxlan_rx_trace_t *tr
+ vxlan_rx_trace_t *tr
= vlib_add_trace (vm, node, b0, sizeof (*tr));
tr->next_index = next0;
tr->error = error0;
- tr->tunnel_index = tunnel_index0;
+ tr->tunnel_index = t0 == 0 ? ~0 : t0 - vxm->tunnels;
tr->vni = vnet_get_vni (vxlan0);
}
vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
vlib_put_next_frame (vm, node, next_index, n_left_to_next);
}
/* Do we still need this now that tunnel tx stats is kept? */
- vlib_node_increment_counter (vm, is_ip4?
- vxlan4_input_node.index:vxlan6_input_node.index,
- VXLAN_ERROR_DECAPSULATED,
+ u32 node_idx = is_ip4 ? vxlan4_input_node.index : vxlan6_input_node.index;
+ vlib_node_increment_counter (vm, node_idx, VXLAN_ERROR_DECAPSULATED,
pkts_decapsulated);
- /* Increment any remaining batch stats */
- if (stats_n_packets)
- {
- vlib_increment_combined_counter
- (im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
- cpu_index, stats_sw_if_index, stats_n_packets, stats_n_bytes);
- node->runtime_data[0] = stats_sw_if_index;
- }
-
return from_frame->n_vectors;
}
goto exit0; /* not VXLAN packet */
/* Validate DIP against VTEPs*/
- if (is_ip4)
+ if (is_ip4)
{
if (addr4.as_u32 != ip40->dst_address.as_u32)
{
}
flags0 = b0->flags;
- good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
/* Don't verify UDP checksum for packets with explicit zero checksum. */
good_udp0 |= udp0->checksum == 0;
/* Verify UDP checksum */
if (PREDICT_FALSE (!good_udp0))
{
- if ((flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED) == 0)
+ if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
{
if (is_ip4)
flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
else
flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
good_udp0 =
- (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
}
}
error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
}
- next0 = error0 ?
+ next0 = error0 ?
IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
b0->error = error0 ? error_node->errors[error0] : 0;
goto exit1; /* not VXLAN packet */
/* Validate DIP against VTEPs*/
- if (is_ip4)
+ if (is_ip4)
{
if (addr4.as_u32 != ip41->dst_address.as_u32)
{
}
flags1 = b1->flags;
- good_udp1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ good_udp1 = (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
/* Don't verify UDP checksum for packets with explicit zero checksum. */
good_udp1 |= udp1->checksum == 0;
/* Verify UDP checksum */
if (PREDICT_FALSE (!good_udp1))
{
- if ((flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED) == 0)
+ if ((flags1 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
{
if (is_ip4)
flags1 = ip4_tcp_udp_validate_checksum (vm, b1);
else
flags1 = ip6_tcp_udp_icmp_validate_checksum (vm, b1);
good_udp1 =
- (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ (flags1 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
}
}
}
else
{
- error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
- error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
+ error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM;
+ error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH;
}
- next1 = error1 ?
+ next1 = error1 ?
IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
b1->error = error1 ? error_node->errors[error1] : 0;
-
+
/* vxlan-input node expect current at VXLAN header */
if (is_ip4)
vlib_buffer_advance (b1, sizeof(ip4_header_t)+sizeof(udp_header_t));
goto exit; /* not VXLAN packet */
/* Validate DIP against VTEPs*/
- if (is_ip4)
+ if (is_ip4)
{
if (addr4.as_u32 != ip40->dst_address.as_u32)
{
}
flags0 = b0->flags;
- good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ good_udp0 = (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
/* Don't verify UDP checksum for packets with explicit zero checksum. */
good_udp0 |= udp0->checksum == 0;
/* Verify UDP checksum */
if (PREDICT_FALSE (!good_udp0))
{
- if ((flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED) == 0)
+ if ((flags0 & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
{
if (is_ip4)
flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
else
flags0 = ip6_tcp_udp_icmp_validate_checksum (vm, b0);
good_udp0 =
- (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ (flags0 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
}
}
error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
}
- next0 = error0 ?
+ next0 = error0 ?
IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
b0->error = error0 ? error_node->errors[error0] : 0;
{ return 0; }
VLIB_INIT_FUNCTION (ip6_vxlan_bypass_init);
+
+#define foreach_vxlan_flow_input_next \
+_(DROP, "error-drop") \
+_(L2_INPUT, "l2-input")
+
+typedef enum
+{
+#define _(s,n) VXLAN_FLOW_NEXT_##s,
+ foreach_vxlan_flow_input_next
+#undef _
+ VXLAN_FLOW_N_NEXT,
+} vxlan_flow_input_next_t;
+
+#define foreach_vxlan_flow_error \
+ _(NONE, "no error") \
+ _(IP_CHECKSUM_ERROR, "Rx ip checksum errors") \
+ _(IP_HEADER_ERROR, "Rx ip header errors") \
+ _(UDP_CHECKSUM_ERROR, "Rx udp checksum errors") \
+ _(UDP_LENGTH_ERROR, "Rx udp length errors")
+
+typedef enum
+{
+#define _(f,s) VXLAN_FLOW_ERROR_##f,
+ foreach_vxlan_flow_error
+#undef _
+ VXLAN_FLOW_N_ERROR,
+} vxlan_flow_error_t;
+
+static char *vxlan_flow_error_strings[] = {
+#define _(n,s) s,
+ foreach_vxlan_flow_error
+#undef _
+};
+
+
+static_always_inline u8
+vxlan_validate_udp_csum (vlib_main_t * vm, vlib_buffer_t *b)
+{
+ u32 flags = b->flags;
+ enum { offset = sizeof(ip4_header_t) + sizeof(udp_header_t) + sizeof(vxlan_header_t), };
+
+ /* Verify UDP checksum */
+ if ((flags & VNET_BUFFER_F_L4_CHECKSUM_COMPUTED) == 0)
+ {
+ vlib_buffer_advance (b, -offset);
+ flags = ip4_tcp_udp_validate_checksum (vm, b);
+ vlib_buffer_advance (b, offset);
+ }
+
+ return (flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+}
+
+static_always_inline u8
+vxlan_check_udp_csum (vlib_main_t * vm, vlib_buffer_t *b)
+{
+ ip4_vxlan_header_t * hdr = vlib_buffer_get_current(b) - sizeof *hdr;
+ udp_header_t * udp = &hdr->udp;
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ u8 good_csum = (b->flags & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0 ||
+ udp->checksum == 0;
+
+ return !good_csum;
+}
+
+static_always_inline u8
+vxlan_check_ip (vlib_buffer_t *b, u16 payload_len)
+{
+ ip4_vxlan_header_t * hdr = vlib_buffer_get_current(b) - sizeof *hdr;
+ u16 ip_len = clib_net_to_host_u16 (hdr->ip4.length);
+ u16 expected = payload_len + sizeof *hdr;
+ return ip_len > expected || hdr->ip4.ttl == 0 || hdr->ip4.ip_version_and_header_length != 0x45;
+}
+
+static_always_inline u8
+vxlan_check_ip_udp_len (vlib_buffer_t *b)
+{
+ ip4_vxlan_header_t * hdr = vlib_buffer_get_current(b) - sizeof *hdr;
+ u16 ip_len = clib_net_to_host_u16 (hdr->ip4.length);
+ u16 udp_len = clib_net_to_host_u16 (hdr->udp.length);
+ return udp_len > ip_len;
+}
+
+static_always_inline u8
+vxlan_err_code (u8 ip_err0, u8 udp_err0, u8 csum_err0)
+{
+ u8 error0 = VXLAN_FLOW_ERROR_NONE;
+ if (ip_err0)
+ error0 = VXLAN_FLOW_ERROR_IP_HEADER_ERROR;
+ if (udp_err0)
+ error0 = VXLAN_FLOW_ERROR_UDP_LENGTH_ERROR;
+ if (csum_err0)
+ error0 = VXLAN_FLOW_ERROR_UDP_CHECKSUM_ERROR;
+ return error0;
+}
+
+uword
+CLIB_MULTIARCH_FN (vxlan_flow_input) (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * f)
+{
+ enum { payload_offset = sizeof(ip4_vxlan_header_t) };
+
+ vxlan_main_t * vxm = &vxlan_main;
+ vnet_interface_main_t * im = &vnet_main.interface_main;
+ vlib_combined_counter_main_t * rx_counter[VXLAN_FLOW_N_NEXT] = {
+ [VXLAN_FLOW_NEXT_DROP] = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_DROP,
+ [VXLAN_FLOW_NEXT_L2_INPUT] = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_RX,
+ };
+ u32 thread_index = vlib_get_thread_index();
+
+ u32 * from = vlib_frame_vector_args (f);
+ u32 n_left_from = f->n_vectors;
+ u32 next_index = VXLAN_FLOW_NEXT_L2_INPUT;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next, *to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from > 3 && n_left_to_next > 3)
+ {
+ u32 bi0 = to_next[0] = from[0];
+ u32 bi1 = to_next[1] = from[1];
+ u32 bi2 = to_next[2] = from[2];
+ u32 bi3 = to_next[3] = from[3];
+ from+=4;
+ n_left_from-=4;
+ to_next+=4;
+ n_left_to_next-=4;
+
+ vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
+ vlib_buffer_t * b1 = vlib_get_buffer (vm, bi1);
+ vlib_buffer_t * b2 = vlib_get_buffer (vm, bi2);
+ vlib_buffer_t * b3 = vlib_get_buffer (vm, bi3);
+
+ vlib_buffer_advance (b0, payload_offset);
+ vlib_buffer_advance (b1, payload_offset);
+ vlib_buffer_advance (b2, payload_offset);
+ vlib_buffer_advance (b3, payload_offset);
+
+ u16 len0 = vlib_buffer_length_in_chain (vm, b0);
+ u16 len1 = vlib_buffer_length_in_chain (vm, b1);
+ u16 len2 = vlib_buffer_length_in_chain (vm, b2);
+ u16 len3 = vlib_buffer_length_in_chain (vm, b3);
+
+ u32 next0 = VXLAN_FLOW_NEXT_L2_INPUT, next1 = VXLAN_FLOW_NEXT_L2_INPUT,
+ next2 = VXLAN_FLOW_NEXT_L2_INPUT, next3 = VXLAN_FLOW_NEXT_L2_INPUT;
+
+ u8 ip_err0 = vxlan_check_ip (b0, len0);
+ u8 ip_err1 = vxlan_check_ip (b1, len1);
+ u8 ip_err2 = vxlan_check_ip (b2, len2);
+ u8 ip_err3 = vxlan_check_ip (b3, len3);
+ u8 ip_err = ip_err0 | ip_err1 | ip_err2 | ip_err3;
+
+ u8 udp_err0 = vxlan_check_ip_udp_len (b0);
+ u8 udp_err1 = vxlan_check_ip_udp_len (b1);
+ u8 udp_err2 = vxlan_check_ip_udp_len (b2);
+ u8 udp_err3 = vxlan_check_ip_udp_len (b3);
+ u8 udp_err = udp_err0 | udp_err1 | udp_err2 | udp_err3;
+
+ u8 csum_err0 = vxlan_check_udp_csum (vm, b0);
+ u8 csum_err1 = vxlan_check_udp_csum (vm, b1);
+ u8 csum_err2 = vxlan_check_udp_csum (vm, b2);
+ u8 csum_err3 = vxlan_check_udp_csum (vm, b3);
+ u8 csum_err = csum_err0 | csum_err1 | csum_err2 | csum_err3;
+
+ if (PREDICT_FALSE(csum_err))
+ {
+ if (csum_err0)
+ csum_err0 = !vxlan_validate_udp_csum (vm, b0);
+ if (csum_err1)
+ csum_err1 = !vxlan_validate_udp_csum (vm, b1);
+ if (csum_err2)
+ csum_err2 = !vxlan_validate_udp_csum (vm, b2);
+ if (csum_err3)
+ csum_err3 = !vxlan_validate_udp_csum (vm, b3);
+ csum_err = csum_err0 | csum_err1 | csum_err2 | csum_err3;
+ }
+
+ if (PREDICT_FALSE(ip_err || udp_err || csum_err))
+ {
+ if (ip_err0 || udp_err0 || csum_err0)
+ {
+ next0 = VXLAN_FLOW_NEXT_DROP;
+ u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0);
+ b0->error = node->errors[error0];
+ }
+ if (ip_err1 || udp_err1 || csum_err1)
+ {
+ next1 = VXLAN_FLOW_NEXT_DROP;
+ u8 error1 = vxlan_err_code (ip_err1, udp_err1, csum_err1);
+ b1->error = node->errors[error1];
+ }
+ if (ip_err2 || udp_err2 || csum_err2)
+ {
+ next2 = VXLAN_FLOW_NEXT_DROP;
+ u8 error2 = vxlan_err_code (ip_err2, udp_err2, csum_err2);
+ b2->error = node->errors[error2];
+ }
+ if (ip_err3 || udp_err3 || csum_err3)
+ {
+ next3 = VXLAN_FLOW_NEXT_DROP;
+ u8 error3 = vxlan_err_code (ip_err3, udp_err3, csum_err3);
+ b3->error = node->errors[error3];
+ }
+ }
+
+ vnet_update_l2_len (b0);
+ vnet_update_l2_len (b1);
+ vnet_update_l2_len (b2);
+ vnet_update_l2_len (b3);
+
+ ASSERT (b0->flow_id != 0);
+ ASSERT (b1->flow_id != 0);
+ ASSERT (b2->flow_id != 0);
+ ASSERT (b3->flow_id != 0);
+
+ u32 t_index0 = b0->flow_id - vxm->flow_id_start;
+ u32 t_index1 = b1->flow_id - vxm->flow_id_start;
+ u32 t_index2 = b2->flow_id - vxm->flow_id_start;
+ u32 t_index3 = b3->flow_id - vxm->flow_id_start;
+
+ vxlan_tunnel_t * t0 = &vxm->tunnels[t_index0];
+ vxlan_tunnel_t * t1 = &vxm->tunnels[t_index1];
+ vxlan_tunnel_t * t2 = &vxm->tunnels[t_index2];
+ vxlan_tunnel_t * t3 = &vxm->tunnels[t_index3];
+
+ /* flow id consumed */
+ b0->flow_id = 0;
+ b1->flow_id = 0;
+ b2->flow_id = 0;
+ b3->flow_id = 0;
+
+ u32 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
+ u32 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX] = t1->sw_if_index;
+ u32 sw_if_index2 = vnet_buffer (b2)->sw_if_index[VLIB_RX] = t2->sw_if_index;
+ u32 sw_if_index3 = vnet_buffer (b3)->sw_if_index[VLIB_RX] = t3->sw_if_index;
+
+ vlib_increment_combined_counter (rx_counter[next0], thread_index, sw_if_index0, 1, len0);
+ vlib_increment_combined_counter (rx_counter[next1], thread_index, sw_if_index1, 1, len1);
+ vlib_increment_combined_counter (rx_counter[next2], thread_index, sw_if_index2, 1, len2);
+ vlib_increment_combined_counter (rx_counter[next3], thread_index, sw_if_index3, 1, len3);
+
+ u32 flags = b0->flags | b1->flags | b2->flags | b3->flags;
+
+ if (PREDICT_FALSE(flags & VLIB_BUFFER_IS_TRACED))
+ {
+ if (b0->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ vxlan_rx_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof *tr);
+ u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0);
+ *tr = (vxlan_rx_trace_t) {
+ .next_index = next0, .error = error0, .tunnel_index = t_index0, .vni = t0->vni };
+ }
+ if (b1->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ vxlan_rx_trace_t *tr = vlib_add_trace (vm, node, b1, sizeof *tr);
+ u8 error1 = vxlan_err_code (ip_err1, udp_err1, csum_err1);
+ *tr = (vxlan_rx_trace_t) {
+ .next_index = next1, .error = error1, .tunnel_index = t_index1, .vni = t1->vni };
+ }
+ if (b2->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ vxlan_rx_trace_t *tr = vlib_add_trace (vm, node, b2, sizeof *tr);
+ u8 error2 = vxlan_err_code (ip_err2, udp_err2, csum_err2);
+ *tr = (vxlan_rx_trace_t) {
+ .next_index = next2, .error = error2, .tunnel_index = t_index2, .vni = t2->vni };
+ }
+ if (b3->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ vxlan_rx_trace_t *tr = vlib_add_trace (vm, node, b3, sizeof *tr);
+ u8 error3 = vxlan_err_code (ip_err3, udp_err3, csum_err3);
+ *tr = (vxlan_rx_trace_t) {
+ .next_index = next3, .error = error3, .tunnel_index = t_index3, .vni = t3->vni };
+ }
+ }
+ vlib_validate_buffer_enqueue_x4
+ (vm, node, next_index, to_next, n_left_to_next,
+ bi0, bi1, bi2, bi3, next0, next1, next2, next3);
+ }
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0 = to_next[0] = from[0];
+ from++;
+ n_left_from--;
+ to_next++;
+ n_left_to_next--;
+
+ vlib_buffer_t * b0 = vlib_get_buffer (vm, bi0);
+ vlib_buffer_advance (b0, payload_offset);
+
+ u16 len0 = vlib_buffer_length_in_chain (vm, b0);
+ u32 next0 = VXLAN_FLOW_NEXT_L2_INPUT;
+
+ u8 ip_err0 = vxlan_check_ip (b0, len0);
+ u8 udp_err0 = vxlan_check_ip_udp_len (b0);
+ u8 csum_err0 = vxlan_check_udp_csum (vm, b0);
+
+ if (csum_err0)
+ csum_err0 = !vxlan_validate_udp_csum (vm, b0);
+ if (ip_err0 || udp_err0 || csum_err0)
+ {
+ next0 = VXLAN_FLOW_NEXT_DROP;
+ u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0);
+ b0->error = node->errors[error0];
+ }
+
+ vnet_update_l2_len (b0);
+
+ ASSERT (b0->flow_id != 0);
+ u32 t_index0 = b0->flow_id - vxm->flow_id_start;
+ vxlan_tunnel_t * t0 = &vxm->tunnels[t_index0];
+ b0->flow_id = 0;
+
+ u32 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX] = t0->sw_if_index;
+ vlib_increment_combined_counter (rx_counter[next0], thread_index, sw_if_index0, 1, len0);
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_rx_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof *tr);
+ u8 error0 = vxlan_err_code (ip_err0, udp_err0, csum_err0);
+ *tr = (vxlan_rx_trace_t) {
+ .next_index = next0, .error = error0, .tunnel_index = t_index0, .vni = t0->vni };
+ }
+ vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, next0);
+ }
+
+ vlib_put_next_frame (vm, node, next_index, n_left_to_next);
+ }
+
+ return f->n_vectors;
+}
+
+/* *INDENT-OFF* */
+#ifndef CLIB_MULTIARCH_VARIANT
+VLIB_REGISTER_NODE (vxlan4_flow_input_node) = {
+ .name = "vxlan-flow-input",
+ .function = vxlan_flow_input,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .vector_size = sizeof (u32),
+
+ .format_trace = format_vxlan_rx_trace,
+
+ .n_errors = VXLAN_FLOW_N_ERROR,
+ .error_strings = vxlan_flow_error_strings,
+
+ .n_next_nodes = VXLAN_FLOW_N_NEXT,
+ .next_nodes = {
+#define _(s,n) [VXLAN_FLOW_NEXT_##s] = n,
+ foreach_vxlan_flow_input_next
+#undef _
+ },
+};
+#endif
+/* *INDENT-ON* */
+
+vlib_node_function_t __clib_weak vxlan_flow_input_avx512;
+vlib_node_function_t __clib_weak vxlan_flow_input_avx2;
+
+#if __x86_64__
+static void __clib_constructor
+vxlan_flow_input_multiarch_select (void)
+{
+ if (vxlan_flow_input_avx512 && clib_cpu_supports_avx512f ())
+ vxlan4_flow_input_node.function = vxlan_flow_input_avx512;
+ else if (vxlan_flow_input_avx2 && clib_cpu_supports_avx2 ())
+ vxlan4_flow_input_node.function = vxlan_flow_input_avx2;
+}
+#endif
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