if (t->tunnel_index != ~0)
{
- s = format (s, "VXLAN: tunnel %d vni %d next %d error %d",
+ s = format (s, "VXLAN decap from vxlan_tunnel%d vni %d next %d error %d",
t->tunnel_index, t->vni, t->next_index, t->error);
}
else
{
- s = format (s, "VXLAN: no tunnel for vni %d next %d error %d",
- t->vni, t->next_index, t->error);
+ s = format (s, "VXLAN decap error - tunnel for vni %d does not exist",
+ t->vni);
}
return s;
}
vxlan_input (vlib_main_t * vm,
vlib_node_runtime_t * node,
vlib_frame_t * from_frame,
- char is_ip4)
+ u32 is_ip4)
{
u32 n_left_from, next_index, * from, * to_next;
vxlan_main_t * vxm = &vxlan_main;
vxlan_header_t * vxlan0, * vxlan1;
uword * p0, * p1;
u32 tunnel_index0, tunnel_index1;
- vxlan_tunnel_t * t0, * t1;
+ 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;
/* udp leaves current_data pointing at the vxlan header */
vxlan0 = vlib_buffer_get_current (b0);
vxlan1 = vlib_buffer_get_current (b1);
-
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)));
+ 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);
} else {
if (is_ip4) {
vlib_buffer_advance
(b0, sizeof(*ip4_0)+sizeof(udp_header_t)+sizeof(*vxlan0));
- vlib_buffer_advance
+ vlib_buffer_advance
(b1, sizeof(*ip4_1)+sizeof(udp_header_t)+sizeof(*vxlan1));
} else {
- vlib_buffer_advance
+ 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));
tunnel_index1 = ~0;
error1 = 0;
+ 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;
- if (PREDICT_FALSE (key4_0.as_u64 != last_key4.as_u64))
+ /* 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 (p0 == 0)
+ 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;
- } else /* !is_ip4 */ {
+ t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0);
+
+ /* 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;
- if (PREDICT_FALSE (memcmp(&key6_0, &last_key6, sizeof(last_key6)) != 0))
+ /* 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 (p0 == 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 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 (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;
}
- t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0);
-
+ next0:
next0 = t0->decap_next_index;
sw_if_index0 = t0->sw_if_index;
len0 = vlib_buffer_length_in_chain (vm, b0);
if (PREDICT_TRUE(next0 == VXLAN_INPUT_NEXT_L2_INPUT))
vnet_update_l2_len (b0);
- /* Set input sw_if_index to VXLAN tunnel for learning */
+ /* 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;
pkts_decapsulated ++;
stats_n_packets += 1;
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;
- if (PREDICT_FALSE (key4_1.as_u64 != last_key4.as_u64))
+ /* 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 (p1 == 0)
+ 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;
- } else /* !is_ip4 */ {
+ t1 = pool_elt_at_index (vxm->tunnels, tunnel_index1);
+
+ /* 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 (p1 == 0)
+ if (PREDICT_FALSE (p1 == NULL))
{
error1 = VXLAN_ERROR_NO_SUCH_TUNNEL;
next1 = VXLAN_INPUT_NEXT_DROP;
}
else
tunnel_index1 = last_tunnel_index;
- }
-
- t1 = pool_elt_at_index (vxm->tunnels, tunnel_index1);
+ t1 = pool_elt_at_index (vxm->tunnels, tunnel_index1);
+
+ /* 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 (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);
if (PREDICT_TRUE(next1 == VXLAN_INPUT_NEXT_L2_INPUT))
vnet_update_l2_len (b1);
- /* Set input sw_if_index to VXLAN tunnel for learning */
+ /* 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;
vxlan_header_t * vxlan0;
uword * p0;
u32 tunnel_index0;
- vxlan_tunnel_t * t0;
+ vxlan_tunnel_t * t0, * mt0 = NULL;
vxlan4_tunnel_key_t key4_0;
vxlan6_tunnel_key_t key6_0;
u32 error0;
/* 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)));
+ vlib_buffer_advance
+ (b0, -(word)(sizeof(udp_header_t)+sizeof(ip4_header_t)));
ip4_0 = vlib_buffer_get_current (b0);
} else {
vlib_buffer_advance
vlib_buffer_advance
(b0, sizeof(*ip4_0)+sizeof(udp_header_t)+sizeof(*vxlan0));
} else {
- vlib_buffer_advance
+ 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;
+ }
+
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 (p0 == 0)
+ 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 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 (p0 == 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 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 (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;
}
- t0 = pool_elt_at_index (vxm->tunnels, tunnel_index0);
-
+ next00:
next0 = t0->decap_next_index;
sw_if_index0 = t0->sw_if_index;
len0 = vlib_buffer_length_in_chain (vm, b0);
if (PREDICT_TRUE(next0 == VXLAN_INPUT_NEXT_L2_INPUT))
vnet_update_l2_len (b0);
- /* Set input sw_if_index to VXLAN tunnel for learning */
+ /* 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;
pkts_decapsulated ++;
stats_n_packets += 1;
VLIB_NODE_FUNCTION_MULTIARCH (vxlan6_input_node, vxlan6_input)
+
+typedef enum {
+ IP_VXLAN_BYPASS_NEXT_DROP,
+ IP_VXLAN_BYPASS_NEXT_VXLAN,
+ IP_VXLAN_BYPASS_N_NEXT,
+} ip_vxan_bypass_next_t;
+
+always_inline uword
+ip_vxlan_bypass_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame,
+ u32 is_ip4)
+{
+ vxlan_main_t * vxm = &vxlan_main;
+ u32 * from, * to_next, n_left_from, n_left_to_next, next_index;
+ vlib_node_runtime_t * error_node = vlib_node_get_runtime (vm, ip4_input_node.index);
+ ip4_address_t addr4; /* last IPv4 address matching a local VTEP address */
+ ip6_address_t addr6; /* last IPv6 address matching a local VTEP address */
+
+ from = vlib_frame_vector_args (frame);
+ n_left_from = frame->n_vectors;
+ next_index = node->cached_next_index;
+
+ if (node->flags & VLIB_NODE_FLAG_TRACE)
+ ip4_forward_next_trace (vm, node, frame, VLIB_TX);
+
+ if (is_ip4) addr4.data_u32 = ~0;
+ else ip6_address_set_zero (&addr6);
+
+ while (n_left_from > 0)
+ {
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ vlib_buffer_t * b0, * b1;
+ ip4_header_t * ip0, * ip1;
+ udp_header_t * udp0, * udp1;
+ u32 bi0, ip_len0, udp_len0, flags0, next0;
+ u32 bi1, ip_len1, udp_len1, flags1, next1;
+ i32 len_diff0, len_diff1;
+ u8 error0, good_udp0, proto0;
+ u8 error1, good_udp1, proto1;
+
+ /* Prefetch next iteration. */
+ {
+ vlib_buffer_t * p2, * p3;
+
+ p2 = vlib_get_buffer (vm, from[2]);
+ p3 = vlib_get_buffer (vm, from[3]);
+
+ vlib_prefetch_buffer_header (p2, LOAD);
+ vlib_prefetch_buffer_header (p3, LOAD);
+
+ CLIB_PREFETCH (p2->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
+ CLIB_PREFETCH (p3->data, 2*CLIB_CACHE_LINE_BYTES, LOAD);
+ }
+
+ bi0 = to_next[0] = from[0];
+ bi1 = to_next[1] = from[1];
+ from += 2;
+ n_left_from -= 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+ ip0 = vlib_buffer_get_current (b0);
+ ip1 = vlib_buffer_get_current (b1);
+
+ /* Setup packet for next IP feature */
+ vnet_feature_next(vnet_buffer(b0)->sw_if_index[VLIB_RX], &next0, b0);
+ vnet_feature_next(vnet_buffer(b1)->sw_if_index[VLIB_RX], &next1, b1);
+
+ /* Treat IP frag packets as "experimental" protocol for now
+ until support of IP frag reassembly is implemented */
+ proto0 = ip4_is_fragment(ip0) ? 0xfe : ip0->protocol;
+ proto1 = ip4_is_fragment(ip1) ? 0xfe : ip1->protocol;
+
+ /* Process packet 0 */
+ if (proto0 != IP_PROTOCOL_UDP)
+ goto exit0; /* not UDP packet */
+
+ udp0 = ip4_next_header (ip0);
+ if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan))
+ goto exit0; /* not VXLAN packet */
+
+ if (is_ip4)
+ {
+ if (addr4.as_u32 != ip0->dst_address.as_u32)
+ {
+ if (!hash_get (vxm->vtep4, ip0->dst_address.as_u32))
+ goto exit0; /* no local VTEP for VXLAN packet */
+ addr4 = ip0->dst_address;
+ }
+ }
+ else goto exit0; /* IP6 VXLAN bypass not yet supported */
+
+ /* vxlan-input node expect current at VXLAN header */
+ vlib_buffer_advance (b0, sizeof(ip4_header_t)+sizeof(udp_header_t));
+
+ flags0 = b0->flags;
+ good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ good_udp0 |= udp0->checksum == 0;
+
+ /* Verify UDP length */
+ ip_len0 = clib_net_to_host_u16 (ip0->length);
+ udp_len0 = clib_net_to_host_u16 (udp0->length);
+
+ len_diff0 = ip_len0 - udp_len0;
+
+ /* Verify UDP checksum */
+ if (PREDICT_FALSE (!good_udp0))
+ {
+ if (!(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED))
+ flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
+ good_udp0 =
+ (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ }
+
+ error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
+
+ next0 = error0 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b0->error = error0 ? error_node->errors[error0] : 0;
+
+ exit0:
+ /* Process packet 1 */
+ if (proto1 != IP_PROTOCOL_UDP)
+ goto exit1; /* not UDP packet */
+
+ udp1 = ip4_next_header (ip1);
+ if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan))
+ goto exit1; /* not VXLAN packet */
+
+ if (is_ip4)
+ {
+ if (addr4.as_u32 != ip1->dst_address.as_u32)
+ {
+ if (!hash_get (vxm->vtep4, ip1->dst_address.as_u32))
+ goto exit1; /* no local VTEP for VXLAN packet */
+ addr4 = ip1->dst_address;
+ }
+ }
+ else goto exit1; /* IP6 VXLAN bypass not yet supported */
+
+ /* vxlan-input node expect current at VXLAN header */
+ vlib_buffer_advance (b1, sizeof(ip4_header_t)+sizeof(udp_header_t));
+
+ flags1 = b1->flags;
+ good_udp1 = (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ good_udp1 |= udp1->checksum == 0;
+
+ /* Verify UDP length */
+ ip_len1 = clib_net_to_host_u16 (ip1->length);
+ udp_len1 = clib_net_to_host_u16 (udp1->length);
+
+ len_diff1 = ip_len1 - udp_len1;
+
+ /* Verify UDP checksum */
+ if (PREDICT_FALSE (!good_udp1))
+ {
+ if (!(flags1 & IP_BUFFER_L4_CHECKSUM_COMPUTED))
+ flags1 = ip4_tcp_udp_validate_checksum (vm, b1);
+ good_udp1 =
+ (flags1 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ }
+
+ error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
+
+ next1 = error1 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b1->error = error1 ? error_node->errors[error1] : 0;
+
+ exit1:
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ vlib_buffer_t * b0;
+ ip4_header_t * ip0;
+ udp_header_t * udp0;
+ u32 bi0, ip_len0, udp_len0, flags0, next0;
+ i32 len_diff0;
+ u8 error0, good_udp0, proto0;
+
+ bi0 = to_next[0] = from[0];
+ from += 1;
+ n_left_from -= 1;
+ to_next += 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ ip0 = vlib_buffer_get_current (b0);
+
+ /* Setup packet for next IP feature */
+ vnet_feature_next(vnet_buffer(b0)->sw_if_index[VLIB_RX], &next0, b0);
+
+ /* Treat IP frag packets as "experimental" protocol for now
+ until support of IP frag reassembly is implemented */
+ proto0 = ip4_is_fragment(ip0) ? 0xfe : ip0->protocol;
+
+ if (proto0 != IP_PROTOCOL_UDP)
+ goto exit; /* not UDP packet */
+
+ udp0 = ip4_next_header (ip0);
+ if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_vxlan))
+ goto exit; /* not VXLAN packet */
+
+ if (is_ip4)
+ {
+ if (addr4.as_u32 != ip0->dst_address.as_u32)
+ {
+ if (!hash_get (vxm->vtep4, ip0->dst_address.as_u32))
+ goto exit; /* no local VTEP for VXLAN packet */
+ addr4 = ip0->dst_address;
+ }
+ }
+ else goto exit; /* IP6 VXLAN bypass not yet supported */
+
+ /* vxlan-input node expect current at VXLAN header */
+ vlib_buffer_advance (b0, sizeof(ip4_header_t)+sizeof(udp_header_t));
+
+ flags0 = b0->flags;
+ good_udp0 = (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+
+ /* Don't verify UDP checksum for packets with explicit zero checksum. */
+ good_udp0 |= udp0->checksum == 0;
+
+ /* Verify UDP length */
+ ip_len0 = clib_net_to_host_u16 (ip0->length);
+ udp_len0 = clib_net_to_host_u16 (udp0->length);
+
+ len_diff0 = ip_len0 - udp_len0;
+
+ /* Verify UDP checksum */
+ if (PREDICT_FALSE (!good_udp0))
+ {
+ if (!(flags0 & IP_BUFFER_L4_CHECKSUM_COMPUTED))
+ flags0 = ip4_tcp_udp_validate_checksum (vm, b0);
+ good_udp0 =
+ (flags0 & IP_BUFFER_L4_CHECKSUM_CORRECT) != 0;
+ }
+
+ error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
+
+ next0 = error0 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b0->error = error0 ? error_node->errors[error0] : 0;
+
+ exit:
+ 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 frame->n_vectors;
+}
+
+static uword
+ip4_vxlan_bypass (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ return ip_vxlan_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
+}
+
+VLIB_REGISTER_NODE (ip4_vxlan_bypass_node) = {
+ .function = ip4_vxlan_bypass,
+ .name = "ip4-vxlan-bypass",
+ .vector_size = sizeof (u32),
+
+ .n_next_nodes = IP_VXLAN_BYPASS_N_NEXT,
+ .next_nodes = {
+ [IP_VXLAN_BYPASS_NEXT_DROP] = "error-drop",
+ [IP_VXLAN_BYPASS_NEXT_VXLAN] = "vxlan4-input",
+ },
+
+ .format_buffer = format_ip4_header,
+ .format_trace = format_ip4_forward_next_trace,
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_bypass_node,ip4_vxlan_bypass)
+
+
+static clib_error_t *
+set_ip_vxlan_bypass (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ unformat_input_t _line_input, * line_input = &_line_input;
+ vnet_main_t * vnm = vnet_get_main();
+ clib_error_t * error = 0;
+ u32 sw_if_index, is_del;
+
+ sw_if_index = ~0;
+ is_del = 0;
+
+ if (! unformat_user (input, unformat_line_input, line_input))
+ return 0;
+
+ while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat_user (line_input, unformat_vnet_sw_interface, vnm, &sw_if_index))
+ ;
+ else if (unformat (line_input, "del"))
+ is_del = 1;
+ else
+ {
+ error = unformat_parse_error (line_input);
+ goto done;
+ }
+ }
+
+ if (~0 == sw_if_index)
+ {
+ error = clib_error_return (0, "unknown interface `%U'",
+ format_unformat_error, line_input);
+ goto done;
+ }
+
+ vnet_feature_enable_disable ("ip4-unicast", "ip4-vxlan-bypass", sw_if_index,
+ is_del == 0, 0, 0);
+ done:
+ return error;
+}
+
+/*?
+ * This command adds the 'ip4-vxlan-bypass' graph node for a given interface.
+ * By adding the IPv4 vxlan-bypass graph node to an interface, the node checks
+ * for and validate input vxlan packet and bypass ip4-lookup, ip4-local,
+ * ip4-udp-lookup nodes to speedup vxlan packet forwarding. This node will
+ * cause extra overhead to for non-vxlan packets which is kept at a minimum.
+ *
+ * @cliexpar
+ * @parblock
+ * Example of graph node before ip4-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip4-vxlan-bypass}
+ * Name Next Previous
+ * ip4-vxlan-bypass error-drop [0]
+ * vxlan4-input [1]
+ * ip4-lookup [2]
+ * @cliexend
+ *
+ * Example of how to enable ip4-vxlan-bypass on an interface:
+ * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0}
+ *
+ * Example of graph node after ip4-vxlan-bypass is enabled:
+ * @cliexstart{show vlib graph ip4-vxlan-bypass}
+ * Name Next Previous
+ * ip4-vxlan-bypass error-drop [0] ip4-input
+ * vxlan4-input [1] ip4-input-no-checksum
+ * ip4-lookup [2]
+ * @cliexend
+ *
+ * Example of how to display the feature enabed on an interface:
+ * @cliexstart{show ip interface features GigabitEthernet2/0/0}
+ * IP feature paths configured on GigabitEthernet2/0/0...
+ *
+ * ipv4 unicast:
+ * ip4-vxlan-bypass
+ * ip4-lookup
+ *
+ * ipv4 multicast:
+ * ip4-lookup-multicast
+ *
+ * ipv4 multicast:
+ * interface-output
+ *
+ * ipv6 unicast:
+ * ip6-lookup
+ *
+ * ipv6 multicast:
+ * ip6-lookup
+ *
+ * ipv6 multicast:
+ * interface-output
+ * @cliexend
+ *
+ * Example of how to disable unicast source checking on an interface:
+ * @cliexcmd{set interface ip vxlan-bypass GigabitEthernet2/0/0 del}
+ * @endparblock
+?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_ip_vxlan_bypass_command, static) = {
+ .path = "set interface ip vxlan-bypass",
+ .function = set_ip_vxlan_bypass,
+ .short_help = "set interface ip vxlan-bypass <interface> [del]",
+};
+
+/* Dummy init function to get us linked in. */
+clib_error_t * ip4_vxlan_bypass_init (vlib_main_t * vm)
+{ return 0; }
+
+VLIB_INIT_FUNCTION (ip4_vxlan_bypass_init);
Code Review / vpp.git / blobdiff