+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_gpe_bypass_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame, u32 is_ip4)
+{
+ vxlan_gpe_main_t *ngm = &vxlan_gpe_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 *ip40, *ip41;
+ ip6_header_t *ip60, *ip61;
+ 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);
+ if (is_ip4)
+ {
+ ip40 = vlib_buffer_get_current (b0);
+ ip41 = vlib_buffer_get_current (b1);
+ }
+ else
+ {
+ ip60 = vlib_buffer_get_current (b0);
+ ip61 = 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);
+
+ if (is_ip4)
+ {
+ proto0 = ip40->protocol;
+ proto1 = ip41->protocol;
+ }
+ else
+ {
+ proto0 = ip60->protocol;
+ proto1 = ip61->protocol;
+ }
+
+ /* Process packet 0 */
+ if (proto0 != IP_PROTOCOL_UDP)
+ goto exit0; /* not UDP packet */
+
+ if (is_ip4)
+ udp0 = ip4_next_header (ip40);
+ else
+ udp0 = ip6_next_header (ip60);
+
+ if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
+ goto exit0; /* not VXLAN packet */
+
+ /* Validate DIP against VTEPs */
+ if (is_ip4)
+ {
+ if (addr4.as_u32 != ip40->dst_address.as_u32)
+ {
+ if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
+ goto exit0; /* no local VTEP for VXLAN packet */
+ addr4 = ip40->dst_address;
+ }
+ }
+ else
+ {
+ if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
+ {
+ if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
+ goto exit0; /* no local VTEP for VXLAN packet */
+ addr6 = ip60->dst_address;
+ }
+ }
+
+ flags0 = b0->flags;
+ 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 length */
+ if (is_ip4)
+ ip_len0 = clib_net_to_host_u16 (ip40->length);
+ else
+ ip_len0 = clib_net_to_host_u16 (ip60->payload_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 & 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 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+ }
+ }
+
+ if (is_ip4)
+ {
+ error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
+ }
+ else
+ {
+ error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
+ }
+
+ next0 = error0 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b0->error = error0 ? error_node->errors[error0] : 0;
+
+ /* vxlan_gpe-input node expect current at VXLAN header */
+ if (is_ip4)
+ vlib_buffer_advance (b0,
+ sizeof (ip4_header_t) +
+ sizeof (udp_header_t));
+ else
+ vlib_buffer_advance (b0,
+ sizeof (ip6_header_t) +
+ sizeof (udp_header_t));
+
+ exit0:
+ /* Process packet 1 */
+ if (proto1 != IP_PROTOCOL_UDP)
+ goto exit1; /* not UDP packet */
+
+ if (is_ip4)
+ udp1 = ip4_next_header (ip41);
+ else
+ udp1 = ip6_next_header (ip61);
+
+ if (udp1->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
+ goto exit1; /* not VXLAN packet */
+
+ /* Validate DIP against VTEPs */
+ if (is_ip4)
+ {
+ if (addr4.as_u32 != ip41->dst_address.as_u32)
+ {
+ if (!hash_get (ngm->vtep4, ip41->dst_address.as_u32))
+ goto exit1; /* no local VTEP for VXLAN packet */
+ addr4 = ip41->dst_address;
+ }
+ }
+ else
+ {
+ if (!ip6_address_is_equal (&addr6, &ip61->dst_address))
+ {
+ if (!hash_get_mem (ngm->vtep6, &ip61->dst_address))
+ goto exit1; /* no local VTEP for VXLAN packet */
+ addr6 = ip61->dst_address;
+ }
+ }
+
+ flags1 = b1->flags;
+ 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 length */
+ if (is_ip4)
+ ip_len1 = clib_net_to_host_u16 (ip41->length);
+ else
+ ip_len1 = clib_net_to_host_u16 (ip61->payload_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 & 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 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+ }
+ }
+
+ if (is_ip4)
+ {
+ error1 = good_udp1 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error1 = (len_diff1 >= 0) ? error1 : IP4_ERROR_UDP_LENGTH;
+ }
+ else
+ {
+ error1 = good_udp1 ? 0 : IP6_ERROR_UDP_CHECKSUM;
+ error1 = (len_diff1 >= 0) ? error1 : IP6_ERROR_UDP_LENGTH;
+ }
+
+ next1 = error1 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b1->error = error1 ? error_node->errors[error1] : 0;
+
+ /* vxlan_gpe-input node expect current at VXLAN header */
+ if (is_ip4)
+ vlib_buffer_advance (b1,
+ sizeof (ip4_header_t) +
+ sizeof (udp_header_t));
+ else
+ vlib_buffer_advance (b1,
+ sizeof (ip6_header_t) +
+ sizeof (udp_header_t));
+
+ 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 *ip40;
+ ip6_header_t *ip60;
+ 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);
+ if (is_ip4)
+ ip40 = vlib_buffer_get_current (b0);
+ else
+ ip60 = vlib_buffer_get_current (b0);
+
+ /* Setup packet for next IP feature */
+ vnet_feature_next (vnet_buffer (b0)->sw_if_index[VLIB_RX], &next0,
+ b0);
+
+ if (is_ip4)
+ proto0 = ip40->protocol;
+ else
+ proto0 = ip60->protocol;
+
+ if (proto0 != IP_PROTOCOL_UDP)
+ goto exit; /* not UDP packet */
+
+ if (is_ip4)
+ udp0 = ip4_next_header (ip40);
+ else
+ udp0 = ip6_next_header (ip60);
+
+ if (udp0->dst_port != clib_host_to_net_u16 (UDP_DST_PORT_VXLAN_GPE))
+ goto exit; /* not VXLAN packet */
+
+ /* Validate DIP against VTEPs */
+ if (is_ip4)
+ {
+ if (addr4.as_u32 != ip40->dst_address.as_u32)
+ {
+ if (!hash_get (ngm->vtep4, ip40->dst_address.as_u32))
+ goto exit; /* no local VTEP for VXLAN packet */
+ addr4 = ip40->dst_address;
+ }
+ }
+ else
+ {
+ if (!ip6_address_is_equal (&addr6, &ip60->dst_address))
+ {
+ if (!hash_get_mem (ngm->vtep6, &ip60->dst_address))
+ goto exit; /* no local VTEP for VXLAN packet */
+ addr6 = ip60->dst_address;
+ }
+ }
+
+ flags0 = b0->flags;
+ 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 length */
+ if (is_ip4)
+ ip_len0 = clib_net_to_host_u16 (ip40->length);
+ else
+ ip_len0 = clib_net_to_host_u16 (ip60->payload_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 & 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 & VNET_BUFFER_F_L4_CHECKSUM_CORRECT) != 0;
+ }
+ }
+
+ if (is_ip4)
+ {
+ error0 = good_udp0 ? 0 : IP4_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP4_ERROR_UDP_LENGTH;
+ }
+ else
+ {
+ error0 = good_udp0 ? 0 : IP6_ERROR_UDP_CHECKSUM;
+ error0 = (len_diff0 >= 0) ? error0 : IP6_ERROR_UDP_LENGTH;
+ }
+
+ next0 = error0 ?
+ IP_VXLAN_BYPASS_NEXT_DROP : IP_VXLAN_BYPASS_NEXT_VXLAN;
+ b0->error = error0 ? error_node->errors[error0] : 0;
+
+ /* vxlan_gpe-input node expect current at VXLAN header */
+ if (is_ip4)
+ vlib_buffer_advance (b0,
+ sizeof (ip4_header_t) +
+ sizeof (udp_header_t));
+ else
+ vlib_buffer_advance (b0,
+ sizeof (ip6_header_t) +
+ sizeof (udp_header_t));
+
+ 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_gpe_bypass (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 1);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip4_vxlan_gpe_bypass_node) = {
+ .function = ip4_vxlan_gpe_bypass,
+ .name = "ip4-vxlan-gpe-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-gpe-input",
+ },
+
+ .format_buffer = format_ip4_header,
+ .format_trace = format_ip4_forward_next_trace,
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip4_vxlan_gpe_bypass_node, ip4_vxlan_gpe_bypass)
+/* Dummy init function to get us linked in. */
+ clib_error_t *ip4_vxlan_gpe_bypass_init (vlib_main_t * vm)
+{
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (ip4_vxlan_gpe_bypass_init);
+
+static uword
+ip6_vxlan_gpe_bypass (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return ip_vxlan_gpe_bypass_inline (vm, node, frame, /* is_ip4 */ 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (ip6_vxlan_gpe_bypass_node) = {
+ .function = ip6_vxlan_gpe_bypass,
+ .name = "ip6-vxlan-gpe-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] = "vxlan6-gpe-input",
+ },
+
+ .format_buffer = format_ip6_header,
+ .format_trace = format_ip6_forward_next_trace,
+};
+/* *INDENT-ON* */
+
+VLIB_NODE_FUNCTION_MULTIARCH (ip6_vxlan_gpe_bypass_node, ip6_vxlan_gpe_bypass)
+/* Dummy init function to get us linked in. */
+ clib_error_t *ip6_vxlan_gpe_bypass_init (vlib_main_t * vm)
+{
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (ip6_vxlan_gpe_bypass_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */