--- /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/ethernet/ethernet.h>
+#include <vnet/vxlan-gpe/vxlan_gpe.h>
+#include <ioam/lib-vxlan-gpe/vxlan_gpe_ioam.h>
+
+/* Statistics (not really errors) */
+#define foreach_vxlan_gpe_pop_ioam_v4_error \
+_(POPPED, "good packets popped")
+
+static char *vxlan_gpe_pop_ioam_v4_error_strings[] = {
+#define _(sym,string) string,
+ foreach_vxlan_gpe_pop_ioam_v4_error
+#undef _
+};
+
+typedef enum
+{
+#define _(sym,str) VXLAN_GPE_POP_IOAM_V4_ERROR_##sym,
+ foreach_vxlan_gpe_pop_ioam_v4_error
+#undef _
+ VXLAN_GPE_POP_IOAM_V4_N_ERROR,
+} vxlan_gpe_pop_ioam_v4_error_t;
+
+typedef struct
+{
+ ioam_trace_t fmt_trace;
+} vxlan_gpe_pop_ioam_v4_trace_t;
+
+
+u8 *
+format_vxlan_gpe_pop_ioam_v4_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ vxlan_gpe_pop_ioam_v4_trace_t *t1
+ = va_arg (*args, vxlan_gpe_pop_ioam_v4_trace_t *);
+ ioam_trace_t *t = &(t1->fmt_trace);
+ vxlan_gpe_ioam_option_t *fmt_trace0;
+ vxlan_gpe_ioam_option_t *opt0, *limit0;
+ vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
+
+ u8 type0;
+
+ fmt_trace0 = (vxlan_gpe_ioam_option_t *) t->option_data;
+
+ s = format (s, "VXLAN_GPE_IOAM_POP: next_index %d len %d traced %d",
+ t->next_index, fmt_trace0->length, t->trace_len);
+
+ opt0 = (vxlan_gpe_ioam_option_t *) (fmt_trace0 + 1);
+ limit0 = (vxlan_gpe_ioam_option_t *) ((u8 *) fmt_trace0) + t->trace_len;
+
+ while (opt0 < limit0)
+ {
+ type0 = opt0->type;
+ switch (type0)
+ {
+ case 0: /* Pad, just stop */
+ opt0 = (vxlan_gpe_ioam_option_t *) ((u8 *) opt0) + 1;
+ break;
+
+ default:
+ if (hm->trace[type0])
+ {
+ s = (*hm->trace[type0]) (s, opt0);
+ }
+ else
+ {
+ s =
+ format (s, "\n unrecognized option %d length %d", type0,
+ opt0->length);
+ }
+ opt0 =
+ (vxlan_gpe_ioam_option_t *) (((u8 *) opt0) + opt0->length +
+ sizeof (vxlan_gpe_ioam_option_t));
+ break;
+ }
+ }
+
+ return s;
+}
+
+always_inline void
+vxlan_gpe_ioam_pop_v4 (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_buffer_t * b0)
+{
+ ip4_header_t *ip0;
+ udp_header_t *udp_hdr0;
+ vxlan_gpe_header_t *gpe_hdr0;
+ vxlan_gpe_ioam_hdr_t *gpe_ioam0;
+
+ ip0 = vlib_buffer_get_current (b0);
+
+ udp_hdr0 = (udp_header_t *) (ip0 + 1);
+ gpe_hdr0 = (vxlan_gpe_header_t *) (udp_hdr0 + 1);
+ gpe_ioam0 = (vxlan_gpe_ioam_hdr_t *) (gpe_hdr0 + 1);
+
+ /* Pop the iOAM data */
+ vlib_buffer_advance (b0,
+ (word) (sizeof (udp_header_t) +
+ sizeof (ip4_header_t) +
+ sizeof (vxlan_gpe_header_t) +
+ gpe_ioam0->length));
+
+ return;
+}
+
+
+
+always_inline void
+vxlan_gpe_pop_ioam_v4_one_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vxlan_gpe_main_t * ngm,
+ vlib_buffer_t * b0, u32 * next0)
+{
+ CLIB_UNUSED (ip4_header_t * ip0);
+ CLIB_UNUSED (udp_header_t * udp_hdr0);
+ CLIB_UNUSED (vxlan_gpe_header_t * gpe_hdr0);
+ CLIB_UNUSED (vxlan_gpe_ioam_hdr_t * gpe_ioam0);
+ CLIB_UNUSED (vxlan_gpe_ioam_option_t * opt0);
+ CLIB_UNUSED (vxlan_gpe_ioam_option_t * limit0);
+ vxlan_gpe_ioam_main_t *hm = &vxlan_gpe_ioam_main;
+
+
+ /* Pop the iOAM header */
+ ip0 = vlib_buffer_get_current (b0);
+ udp_hdr0 = (udp_header_t *) (ip0 + 1);
+ gpe_hdr0 = (vxlan_gpe_header_t *) (udp_hdr0 + 1);
+ gpe_ioam0 = (vxlan_gpe_ioam_hdr_t *) (gpe_hdr0 + 1);
+ opt0 = (vxlan_gpe_ioam_option_t *) (gpe_ioam0 + 1);
+ limit0 = (vxlan_gpe_ioam_option_t *) ((u8 *) gpe_ioam0 + gpe_ioam0->length);
+
+ /*
+ * Basic validity checks
+ */
+ if (gpe_ioam0->length > clib_net_to_host_u16 (ip0->length))
+ {
+ next0[0] = VXLAN_GPE_INPUT_NEXT_DROP;
+ goto trace00;
+ }
+
+ /* Scan the set of h-b-h options, process ones that we understand */
+ while (opt0 < limit0)
+ {
+ u8 type0;
+ type0 = opt0->type;
+ switch (type0)
+ {
+ case 0: /* Pad1 */
+ opt0 = (vxlan_gpe_ioam_option_t *) ((u8 *) opt0) + 1;
+ continue;
+ case 1: /* PadN */
+ break;
+ default:
+ if (hm->pop_options[type0])
+ {
+ if ((*hm->pop_options[type0]) (ip0, opt0) < 0)
+ {
+ next0[0] = VXLAN_GPE_INPUT_NEXT_DROP;
+ goto trace00;
+ }
+ }
+ break;
+ }
+ opt0 =
+ (vxlan_gpe_ioam_option_t *) (((u8 *) opt0) + opt0->length +
+ sizeof (vxlan_gpe_ioam_hdr_t));
+ }
+
+
+ next0[0] =
+ (gpe_ioam0->protocol < VXLAN_GPE_PROTOCOL_MAX) ?
+ ngm->
+ decap_next_node_list[gpe_ioam0->protocol] : VXLAN_GPE_INPUT_NEXT_DROP;
+
+trace00:
+ if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ vxlan_gpe_pop_ioam_v4_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ u32 trace_len = gpe_ioam0->length;
+ t->fmt_trace.next_index = next0[0];
+ /* Capture the h-b-h option verbatim */
+ trace_len =
+ trace_len <
+ ARRAY_LEN (t->fmt_trace.
+ option_data) ? trace_len : ARRAY_LEN (t->fmt_trace.
+ option_data);
+ t->fmt_trace.trace_len = trace_len;
+ clib_memcpy (&(t->fmt_trace.option_data), gpe_ioam0, trace_len);
+ }
+
+ /* Remove the iOAM header inside the VxLAN-GPE header */
+ vxlan_gpe_ioam_pop_v4 (vm, node, b0);
+ return;
+}
+
+always_inline void
+vxlan_gpe_pop_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_pop_ioam_v4_one_inline (vm, node, ngm, b0, next0);
+ vxlan_gpe_pop_ioam_v4_one_inline (vm, node, ngm, b1, next1);
+}
+
+
+
+static uword
+vxlan_gpe_pop_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;
+
+ 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;
+
+ /* 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);
+
+ vxlan_gpe_pop_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);
+ }
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t *b0;
+ u32 next0;
+
+ 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);
+
+ vxlan_gpe_pop_ioam_v4_one_inline (vm, node, ngm, b0, &next0);
+
+
+ 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_pop_ioam_v4 (vlib_main_t * vm,
+ vlib_node_runtime_t * node, vlib_frame_t * from_frame)
+{
+ return vxlan_gpe_pop_ioam (vm, node, from_frame, 0);
+}
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (vxlan_gpe_pop_ioam_v4_node) = {
+ .function = vxlan_gpe_pop_ioam_v4,
+ .name = "vxlan-gpe-pop-ioam-v4",
+ .vector_size = sizeof (u32),
+ .format_trace = format_vxlan_gpe_pop_ioam_v4_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(vxlan_gpe_pop_ioam_v4_error_strings),
+ .error_strings = vxlan_gpe_pop_ioam_v4_error_strings,
+
+ .n_next_nodes = VXLAN_GPE_INPUT_N_NEXT,
+
+ .next_nodes = {
+#define _(s,n) [VXLAN_GPE_INPUT_NEXT_##s] = n,
+ foreach_vxlan_gpe_input_next
+#undef _
+ },
+};
+/* *INDENT-ON* */
+
+
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
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