--- /dev/null
+ /*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include <vppinfra/error.h>
+#include <vppinfra/hash.h>
+#include <vnet/vnet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ip/udp.h>
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/vxlan-gpe/vxlan_gpe.h>
+#include <ioam/lib-vxlan-gpe/vxlan_gpe_ioam_packet.h>
+#include <ioam/lib-vxlan-gpe/vxlan_gpe_ioam.h>
+#include <ioam/lib-vxlan-gpe/vxlan_gpe_ioam_util.h>
+#include <vnet/fib/ip6_fib.h>
+#include <vnet/fib/ip4_fib.h>
+#include <vnet/fib/fib_entry.h>
+
+/* Statistics (not really errors) */
+#define foreach_vxlan_gpe_transit_ioam_error \
+_(ENCAPSULATED, "good packets encapsulated")
+
+static char *vxlan_gpe_transit_ioam_error_strings[] = {
+#define _(sym,string) string,
+ foreach_vxlan_gpe_transit_ioam_error
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) VXLAN_GPE_TRANSIT_IOAM_ERROR_##sym,
+ foreach_vxlan_gpe_transit_ioam_error
+#undef _
+ VXLAN_GPE_TRANSIT_IOAM_N_ERROR,
+} vxlan_gpe_transit_ioam_error_t;
+
+typedef enum
+{
+ VXLAN_GPE_TRANSIT_IOAM_NEXT_OUTPUT,
+ VXLAN_GPE_TRANSIT_IOAM_NEXT_DROP,
+ VXLAN_GPE_TRANSIT_IOAM_N_NEXT
+} vxlan_gpe_transit_ioam_next_t;
+
+
+/* *INDENT-OFF* */
+VNET_FEATURE_INIT (vxlan_gpe_transit_ioam, static) =
+{
+ .arc_name = "ip4-output",
+ .node_name = "vxlan-gpe-transit-ioam",
+ .runs_before = VNET_FEATURES ("interface-output"),
+};
+/* *INDENT-ON* */
+
+static uword
+vxlan_gpe_transit_ioam (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+{
+ u32 n_left_from, next_index, *from, *to_next;
+
+ from = vlib_frame_vector_args (from_frame);
+ n_left_from = from_frame->n_vectors;
+
+ next_index = node->cached_next_index;
+
+ while (n_left_from > 0)
+ {
+ u32 n_left_to_next;
+
+ vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
+
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 = VXLAN_GPE_TRANSIT_IOAM_NEXT_OUTPUT;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+ ip4_header_t *ip0;
+ u32 iph_offset = 0;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ iph_offset = vnet_buffer (b0)->ip.save_rewrite_length;
+ ip0 = (ip4_header_t *) ((u8 *) vlib_buffer_get_current (b0)
+ + iph_offset);
+
+ /* just forward non ipv4 packets */
+ if (PREDICT_FALSE
+ ((ip0->ip_version_and_header_length & 0xF0) == 0x40))
+ {
+ /* ipv4 packets */
+ udp_header_t *udp_hdr0 = (udp_header_t *) (ip0 + 1);
+ if (PREDICT_FALSE
+ ((ip0->protocol == IP_PROTOCOL_UDP) &&
+ (clib_net_to_host_u16 (udp_hdr0->dst_port) ==
+ UDP_DST_PORT_vxlan_gpe)))
+ {
+
+ /* Check the iOAM header */
+ vxlan_gpe_header_t *gpe_hdr0 =
+ (vxlan_gpe_header_t *) (udp_hdr0 + 1);
+
+ if (PREDICT_FALSE
+ (gpe_hdr0->protocol == VXLAN_GPE_PROTOCOL_IOAM))
+ {
+ uword *t = NULL;
+ vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
+ fib_prefix_t key4;
+ memset (&key4, 0, sizeof (key4));
+ key4.fp_proto = FIB_PROTOCOL_IP4;
+ key4.fp_addr.ip4.as_u32 = ip0->dst_address.as_u32;
+ t = hash_get_mem (hm->dst_by_ip4, &key4);
+ if (t)
+ {
+
+
+ vlib_buffer_advance (b0,
+ (word) (sizeof
+ (ethernet_header_t)));
+ vxlan_gpe_encap_decap_ioam_v4_one_inline (vm, node,
+ b0,
+ &next0,
+ VXLAN_GPE_TRANSIT_IOAM_NEXT_DROP,
+ 1
+ /* use_adj */
+ );
+ vlib_buffer_advance (b0,
+ -(word) (sizeof
+ (ethernet_header_t)));
+ }
+ }
+ }
+ }
+
+ 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 from_frame->n_vectors;
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (vxlan_gpe_transit_ioam_node) = {
+ .function = vxlan_gpe_transit_ioam,
+ .name = "vxlan-gpe-transit-ioam",
+ .vector_size = sizeof (u32),
+ .format_trace = format_vxlan_gpe_ioam_v4_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(vxlan_gpe_transit_ioam_error_strings),
+ .error_strings = vxlan_gpe_transit_ioam_error_strings,
+
+ .n_next_nodes = VXLAN_GPE_TRANSIT_IOAM_N_NEXT,
+
+ .next_nodes = {
+ [VXLAN_GPE_TRANSIT_IOAM_NEXT_OUTPUT] = "interface-output",
+ [VXLAN_GPE_TRANSIT_IOAM_NEXT_DROP] = "error-drop",
+ },
+
+};
+/* *INDENT-ON* */
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff