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-rw-r--r--plugins/ioam-plugin/ioam/lib-vxlan-gpe/ioam_decap.c223
1 files changed, 223 insertions, 0 deletions
diff --git a/plugins/ioam-plugin/ioam/lib-vxlan-gpe/ioam_decap.c b/plugins/ioam-plugin/ioam/lib-vxlan-gpe/ioam_decap.c
new file mode 100644
index 00000000000..f938a330446
--- /dev/null
+++ b/plugins/ioam-plugin/ioam/lib-vxlan-gpe/ioam_decap.c
@@ -0,0 +1,223 @@
+/*
+ * 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/ethernet/ethernet.h>
+#include <vnet/vxlan-gpe/vxlan_gpe.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>
+
+/* Statistics (not really errors) */
+#define foreach_vxlan_gpe_decap_ioam_v4_error \
+_(DECAPSULATED, "good packets decapsulated")
+
+static char *vxlan_gpe_decap_ioam_v4_error_strings[] = {
+#define _(sym,string) string,
+ foreach_vxlan_gpe_decap_ioam_v4_error
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) VXLAN_GPE_DECAP_IOAM_V4_ERROR_##sym,
+ foreach_vxlan_gpe_decap_ioam_v4_error
+#undef _
+ VXLAN_GPE_DECAP_IOAM_V4_N_ERROR,
+} vxlan_gpe_decap_ioam_v4_error_t;
+
+
+always_inline void
+vxlan_gpe_decap_ioam_v4_two_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vxlan_gpe_main_t * ngm,
+ vlib_buffer_t * b0, vlib_buffer_t * b1,
+ u32 * next0, u32 * next1)
+{
+ vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
+
+ next0[0] = next1[0] = hm->decap_v4_next_override;
+ vxlan_gpe_encap_decap_ioam_v4_one_inline (vm, node, ngm, b0, &next0[0],
+ VXLAN_GPE_DECAP_IOAM_V4_NEXT_DROP,
+ 0 /* use_adj */ );
+ vxlan_gpe_encap_decap_ioam_v4_one_inline (vm, node, ngm, b1, &next0[1],
+ VXLAN_GPE_DECAP_IOAM_V4_NEXT_DROP,
+ 0 /* use_adj */ );
+}
+
+
+
+static uword
+vxlan_gpe_decap_ioam (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame, u8 is_ipv6)
+{
+ u32 n_left_from, next_index, *from, *to_next;
+ vxlan_gpe_main_t *ngm = &vxlan_gpe_main;
+ vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
+
+ 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 >= 4 && n_left_to_next >= 2)
+ {
+ u32 bi0, bi1;
+ vlib_buffer_t *b0, *b1;
+ u32 next0, next1;
+
+ next0 = next1 = hm->decap_v4_next_override;
+
+ /* 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 = from[0];
+ bi1 = from[1];
+ to_next[0] = bi0;
+ to_next[1] = bi1;
+ from += 2;
+ to_next += 2;
+ n_left_to_next -= 2;
+ n_left_from -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+
+ vlib_buffer_advance (b0,
+ -(word) (sizeof (udp_header_t) +
+ sizeof (ip4_header_t) +
+ sizeof (vxlan_gpe_header_t)));
+ vlib_buffer_advance (b1,
+ -(word) (sizeof (udp_header_t) +
+ sizeof (ip4_header_t) +
+ sizeof (vxlan_gpe_header_t)));
+
+ vxlan_gpe_decap_ioam_v4_two_inline (vm, node, ngm, b0, b1,
+ &next0, &next1);
+
+
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
+ n_left_to_next, bi0, bi1, next0,
+ next1);
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_gpe_ioam_v4_trace_t *tr = vlib_add_trace (vm, node, b0,
+ sizeof (*tr));
+ }
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0 = hm->decap_v4_next_override;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+
+ vlib_buffer_advance (b0,
+ -(word) (sizeof (udp_header_t) +
+ sizeof (ip4_header_t) +
+ sizeof (vxlan_gpe_header_t)));
+
+ next0 = hm->decap_v4_next_override;
+ vxlan_gpe_encap_decap_ioam_v4_one_inline (vm, node, ngm, b0,
+ &next0,
+ VXLAN_GPE_DECAP_IOAM_V4_NEXT_DROP,
+ 0 /* use_adj */ );
+
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_gpe_ioam_v4_trace_t *tr = vlib_add_trace (vm, node, b0,
+ sizeof (*tr));
+ }
+ 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;
+}
+
+
+static uword
+vxlan_gpe_decap_ioam_v4 (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return vxlan_gpe_decap_ioam (vm, node, from_frame, 0);
+}
+
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (vxlan_gpe_decap_ioam_v4_node) = {
+ .function = vxlan_gpe_decap_ioam_v4,
+ .name = "vxlan-gpe-decap-ioam-v4",
+ .vector_size = sizeof (u32),
+ .format_trace = format_vxlan_gpe_ioam_v4_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(vxlan_gpe_decap_ioam_v4_error_strings),
+ .error_strings = vxlan_gpe_decap_ioam_v4_error_strings,
+
+ .n_next_nodes = VXLAN_GPE_DECAP_IOAM_V4_N_NEXT,
+
+ .next_nodes = {
+ [VXLAN_GPE_DECAP_IOAM_V4_NEXT_POP] = "vxlan-gpe-pop-ioam-v4",
+ [VXLAN_GPE_DECAP_IOAM_V4_NEXT_DROP] = "error-drop",
+ },
+};
+/* *INDENT-ON* */
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */