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-rw-r--r--src/plugins/nsh/nsh_pop.c365
1 files changed, 365 insertions, 0 deletions
diff --git a/src/plugins/nsh/nsh_pop.c b/src/plugins/nsh/nsh_pop.c
new file mode 100644
index 00000000000..cd25bb9e3f7
--- /dev/null
+++ b/src/plugins/nsh/nsh_pop.c
@@ -0,0 +1,365 @@
+/*
+ * nsh_pop.c - nsh POP only processing
+ *
+ * Copyright (c) 2017 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 <vnet/vnet.h>
+#include <vnet/plugin/plugin.h>
+#include <nsh/nsh.h>
+#include <vnet/gre/gre.h>
+#include <vnet/vxlan/vxlan.h>
+#include <vnet/vxlan-gpe/vxlan_gpe.h>
+#include <vnet/l2/l2_classify.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+
+extern nsh_option_map_t * nsh_md2_lookup_option (u16 class, u8 type);
+
+extern u8 * format_nsh_header (u8 * s, va_list * args);
+extern u8 * format_nsh_node_map_trace (u8 * s, va_list * args);
+
+/* format from network order */
+u8 * format_nsh_pop_header (u8 * s, va_list * args)
+{
+ return format_nsh_header(s, args);
+}
+
+
+
+u8 * format_nsh_pop_node_map_trace (u8 * s, va_list * args)
+{
+ return format_nsh_node_map_trace(s, args);
+}
+
+
+static uword
+nsh_pop_inline (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ u32 n_left_from, next_index, *from, *to_next;
+ nsh_main_t * nm = &nsh_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 = NSH_NODE_NEXT_DROP, next1 = NSH_NODE_NEXT_DROP;
+ uword * entry0, *entry1;
+ nsh_base_header_t * hdr0 = 0, *hdr1 = 0;
+ u32 header_len0 = 0, header_len1 = 0;
+ u32 nsp_nsi0, nsp_nsi1;
+ u32 error0, error1;
+ nsh_map_t * map0 = 0, *map1 = 0;
+
+ /* 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_from -= 2;
+ n_left_to_next -= 2;
+
+ error0 = 0;
+ error1 = 0;
+
+ b0 = vlib_get_buffer(vm, bi0);
+ b1 = vlib_get_buffer(vm, bi1);
+ hdr0 = vlib_buffer_get_current(b0);
+ nsp_nsi0 = hdr0->nsp_nsi;
+ header_len0 = hdr0->length * 4;
+
+ hdr1 = vlib_buffer_get_current(b1);
+ nsp_nsi1 = hdr1->nsp_nsi;
+ header_len1 = hdr1->length * 4;
+
+ /* Process packet 0 */
+ entry0 = hash_get_mem(nm->nsh_mapping_by_key, &nsp_nsi0);
+ if (PREDICT_FALSE(entry0 == 0))
+ {
+ error0 = NSH_NODE_ERROR_NO_MAPPING;
+ goto trace0;
+ }
+
+ /* Entry should point to a mapping ...*/
+ map0 = pool_elt_at_index(nm->nsh_mappings, entry0[0]);
+ if (PREDICT_FALSE(map0 == 0))
+ {
+ error0 = NSH_NODE_ERROR_NO_MAPPING;
+ goto trace0;
+ }
+
+ /* set up things for next node to transmit ie which node to handle it and where */
+ next0 = map0->next_node;
+ //vnet_buffer(b0)->sw_if_index[VLIB_TX] = map0->sw_if_index;
+
+ if(PREDICT_FALSE(map0->nsh_action == NSH_ACTION_POP))
+ {
+ /* Manipulate MD2 */
+ if(PREDICT_FALSE(hdr0->md_type == 2))
+ {
+ if (PREDICT_FALSE(next0 == NSH_NODE_NEXT_DROP))
+ {
+ error0 = NSH_NODE_ERROR_INVALID_OPTIONS;
+ goto trace0;
+ }
+ //vnet_buffer(b0)->sw_if_index[VLIB_RX] = map0->sw_if_index;
+ }
+
+ /* Pop NSH header */
+ vlib_buffer_advance(b0, (word)header_len0);
+ goto trace0;
+ }
+
+ entry0 = hash_get_mem(nm->nsh_entry_by_key, &map0->mapped_nsp_nsi);
+ if (PREDICT_FALSE(entry0 == 0))
+ {
+ error0 = NSH_NODE_ERROR_NO_ENTRY;
+ goto trace0;
+ }
+
+ trace0: b0->error = error0 ? node->errors[error0] : 0;
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ nsh_input_trace_t *tr = vlib_add_trace(vm, node, b0, sizeof(*tr));
+ clib_memcpy ( &(tr->trace_data), hdr0, (hdr0->length*4) );
+ }
+
+ /* Process packet 1 */
+ entry1 = hash_get_mem(nm->nsh_mapping_by_key, &nsp_nsi1);
+ if (PREDICT_FALSE(entry1 == 0))
+ {
+ error1 = NSH_NODE_ERROR_NO_MAPPING;
+ goto trace1;
+ }
+
+ /* Entry should point to a mapping ...*/
+ map1 = pool_elt_at_index(nm->nsh_mappings, entry1[0]);
+ if (PREDICT_FALSE(map1 == 0))
+ {
+ error1 = NSH_NODE_ERROR_NO_MAPPING;
+ goto trace1;
+ }
+
+ /* set up things for next node to transmit ie which node to handle it and where */
+ next1 = map1->next_node;
+ //vnet_buffer(b1)->sw_if_index[VLIB_TX] = map1->sw_if_index;
+
+ if(PREDICT_FALSE(map1->nsh_action == NSH_ACTION_POP))
+ {
+ /* Manipulate MD2 */
+ if(PREDICT_FALSE(hdr1->md_type == 2))
+ {
+ if (PREDICT_FALSE(next1 == NSH_NODE_NEXT_DROP))
+ {
+ error1 = NSH_NODE_ERROR_INVALID_OPTIONS;
+ goto trace1;
+ }
+ //vnet_buffer(b1)->sw_if_index[VLIB_RX] = map1->sw_if_index;
+ }
+
+ /* Pop NSH header */
+ vlib_buffer_advance(b1, (word)header_len1);
+ goto trace1;
+ }
+
+ entry1 = hash_get_mem(nm->nsh_entry_by_key, &map1->mapped_nsp_nsi);
+ if (PREDICT_FALSE(entry1 == 0))
+ {
+ error1 = NSH_NODE_ERROR_NO_ENTRY;
+ goto trace1;
+ }
+
+
+ trace1: b1->error = error1 ? node->errors[error1] : 0;
+
+ if (PREDICT_FALSE(b1->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ nsh_input_trace_t *tr = vlib_add_trace(vm, node, b1, sizeof(*tr));
+ clib_memcpy ( &(tr->trace_data), hdr1, (hdr1->length*4) );
+ }
+
+ 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 = 0;
+ vlib_buffer_t * b0 = NULL;
+ u32 next0 = NSH_NODE_NEXT_DROP;
+ uword * entry0;
+ nsh_base_header_t * hdr0 = 0;
+ u32 header_len0 = 0;
+ u32 nsp_nsi0;
+ u32 error0;
+ nsh_map_t * map0 = 0;
+
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+ error0 = 0;
+
+ b0 = vlib_get_buffer(vm, bi0);
+ hdr0 = vlib_buffer_get_current(b0);
+
+ nsp_nsi0 = hdr0->nsp_nsi;
+ header_len0 = hdr0->length * 4;
+
+ entry0 = hash_get_mem(nm->nsh_mapping_by_key, &nsp_nsi0);
+
+ if (PREDICT_FALSE(entry0 == 0))
+ {
+ error0 = NSH_NODE_ERROR_NO_MAPPING;
+ goto trace00;
+ }
+
+ /* Entry should point to a mapping ...*/
+ map0 = pool_elt_at_index(nm->nsh_mappings, entry0[0]);
+
+ if (PREDICT_FALSE(map0 == 0))
+ {
+ error0 = NSH_NODE_ERROR_NO_MAPPING;
+ goto trace00;
+ }
+
+ /* set up things for next node to transmit ie which node to handle it and where */
+ next0 = map0->next_node;
+ //vnet_buffer(b0)->sw_if_index[VLIB_TX] = map0->sw_if_index;
+
+ if(PREDICT_FALSE(map0->nsh_action == NSH_ACTION_POP))
+ {
+ /* Manipulate MD2 */
+ if(PREDICT_FALSE(hdr0->md_type == 2))
+ {
+ if (PREDICT_FALSE(next0 == NSH_NODE_NEXT_DROP))
+ {
+ error0 = NSH_NODE_ERROR_INVALID_OPTIONS;
+ goto trace00;
+ }
+ //vnet_buffer(b0)->sw_if_index[VLIB_RX] = map0->sw_if_index;
+ }
+
+ /* Pop NSH header */
+ vlib_buffer_advance(b0, (word)header_len0);
+ goto trace00;
+ }
+
+ entry0 = hash_get_mem(nm->nsh_entry_by_key, &map0->mapped_nsp_nsi);
+ if (PREDICT_FALSE(entry0 == 0))
+ {
+ error0 = NSH_NODE_ERROR_NO_ENTRY;
+ goto trace00;
+ }
+
+ trace00: b0->error = error0 ? node->errors[error0] : 0;
+
+ if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ nsh_input_trace_t *tr = vlib_add_trace(vm, node, b0, sizeof(*tr));
+ clib_memcpy ( &(tr->trace_data[0]), hdr0, (hdr0->length*4) );
+ }
+
+ 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;
+}
+
+/**
+ * @brief Graph processing dispatch function for NSH Input
+ *
+ * @node nsh_input
+ * @param *vm
+ * @param *node
+ * @param *from_frame
+ *
+ * @return from_frame->n_vectors
+ *
+ */
+static uword
+nsh_pop (vlib_main_t * vm, vlib_node_runtime_t * node,
+ vlib_frame_t * from_frame)
+{
+ return nsh_pop_inline (vm, node, from_frame);
+}
+
+static char * nsh_pop_node_error_strings[] = {
+#define _(sym,string) string,
+ foreach_nsh_node_error
+#undef _
+};
+
+/* register nsh-input node */
+VLIB_REGISTER_NODE (nsh_pop_node) = {
+ .function = nsh_pop,
+ .name = "nsh-pop",
+ .vector_size = sizeof (u32),
+ .format_trace = format_nsh_pop_node_map_trace,
+ .format_buffer = format_nsh_pop_header,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(nsh_pop_node_error_strings),
+ .error_strings = nsh_pop_node_error_strings,
+
+ .n_next_nodes = NSH_NODE_N_NEXT,
+
+ .next_nodes = {
+#define _(s,n) [NSH_NODE_NEXT_##s] = n,
+ foreach_nsh_node_next
+#undef _
+ },
+};
+
+VLIB_NODE_FUNCTION_MULTIARCH (nsh_pop_node, nsh_pop);
+
+