--- /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 <vlib/vlib.h>
+#include <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vppinfra/error.h>
+
+#include <vnet/ip/ip.h>
+
+#include <vppinfra/hash.h>
+#include <vppinfra/error.h>
+#include <vppinfra/elog.h>
+
+typedef struct {
+ /* convenience */
+ vlib_main_t * vlib_main;
+ vnet_main_t * vnet_main;
+} ip4_hop_by_hop_main_t;
+
+ip4_hop_by_hop_main_t ip4_hop_by_hop_main;
+
+vlib_node_registration_t ip4_hop_by_hop_node;
+
+typedef struct {
+ u32 next_index;
+} ip4_hop_by_hop_trace_t;
+
+/* packet trace format function */
+static u8 * format_ip4_hop_by_hop_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 *);
+ ip4_hop_by_hop_trace_t * t = va_arg (*args, ip4_hop_by_hop_trace_t *);
+
+ s = format (s, "IP4_HOP_BY_HOP: next index %d",
+ t->next_index);
+ return s;
+}
+
+vlib_node_registration_t ip4_hop_by_hop_node;
+
+#define foreach_ip4_hop_by_hop_error \
+_(PROCESSED, "Pkts with ip4 hop-by-hop options")
+
+typedef enum {
+#define _(sym,str) IP4_HOP_BY_HOP_ERROR_##sym,
+ foreach_ip4_hop_by_hop_error
+#undef _
+ IP4_HOP_BY_HOP_N_ERROR,
+} ip4_hop_by_hop_error_t;
+
+static char * ip4_hop_by_hop_error_strings[] = {
+#define _(sym,string) string,
+ foreach_ip4_hop_by_hop_error
+#undef _
+};
+
+static uword
+ip4_hop_by_hop_node_fn (vlib_main_t * vm,
+ vlib_node_runtime_t * node,
+ vlib_frame_t * frame)
+{
+ ip4_main_t * im = &ip4_main;
+ ip_lookup_main_t * lm = &im->lookup_main;
+ u32 n_left_from, * from, * to_next;
+ ip_lookup_next_t next_index;
+ u32 processed = 0;
+
+ from = vlib_frame_vector_args (frame);
+ n_left_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);
+
+#if 0
+ while (n_left_from >= 4 && n_left_to_next >= 2)
+ {
+ u32 next0 = IP4_HOP_BY_HOP_NEXT_INTERFACE_OUTPUT;
+ u32 next1 = IP4_HOP_BY_HOP_NEXT_INTERFACE_OUTPUT;
+ u32 sw_if_index0, sw_if_index1;
+ u8 tmp0[6], tmp1[6];
+ ethernet_header_t *en0, *en1;
+ u32 bi0, bi1;
+ vlib_buffer_t * b0, * b1;
+
+ /* 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, CLIB_CACHE_LINE_BYTES, STORE);
+ CLIB_PREFETCH (p3->data, CLIB_CACHE_LINE_BYTES, STORE);
+ }
+
+ /* speculatively enqueue b0 and b1 to the current next frame */
+ to_next[0] = bi0 = from[0];
+ to_next[1] = bi1 = from[1];
+ from += 2;
+ to_next += 2;
+ n_left_from -= 2;
+ n_left_to_next -= 2;
+
+ b0 = vlib_get_buffer (vm, bi0);
+ b1 = vlib_get_buffer (vm, bi1);
+
+ /* $$$$$ Dual loop: process 2 x packets here $$$$$ */
+ ASSERT (b0->current_data == 0);
+ ASSERT (b1->current_data == 0);
+
+ ip0 = vlib_buffer_get_current (b0);
+ ip1 = vlib_buffer_get_current (b0);
+
+ sw_if_index0 = vnet_buffer(b0)->sw_if_index[VLIB_RX];
+ sw_if_index1 = vnet_buffer(b1)->sw_if_index[VLIB_RX];
+
+ /* $$$$$ End of processing 2 x packets $$$$$ */
+
+ if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)))
+ {
+ if (b0->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ ip4_hop_by_hop_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->sw_if_index = sw_if_index0;
+ t->next_index = next0;
+ }
+ if (b1->flags & VLIB_BUFFER_IS_TRACED)
+ {
+ ip4_hop_by_hop_trace_t *t =
+ vlib_add_trace (vm, node, b1, sizeof (*t));
+ t->sw_if_index = sw_if_index1;
+ t->next_index = next1;
+ }
+ }
+
+ /* verify speculative enqueues, maybe switch current next frame */
+ vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
+ to_next, n_left_to_next,
+ bi0, bi1, next0, next1);
+ }
+#endif
+
+ while (n_left_from > 0 && n_left_to_next > 0)
+ {
+ u32 bi0;
+ vlib_buffer_t * b0;
+ u32 next0;
+ u32 adj_index0;
+ ip_adjacency_t * adj0;
+
+ /* speculatively enqueue b0 to the current next frame */
+ bi0 = from[0];
+ to_next[0] = bi0;
+ from += 1;
+ to_next += 1;
+ n_left_from -= 1;
+ n_left_to_next -= 1;
+
+ b0 = vlib_get_buffer (vm, bi0);
+
+ adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
+ adj0 = ip_get_adjacency (lm, adj_index0);
+
+ /* $$$$$$$$$$$$ process one (or more) hop-by-hop header(s) here */
+
+
+ /* $$$$$$$$$$$$ */
+
+ /* Send the packet e.g. to ip4_rewrite */
+ next0 = adj0->lookup_next_index;
+
+ if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE)
+ && (b0->flags & VLIB_BUFFER_IS_TRACED)))
+ {
+ ip4_hop_by_hop_trace_t *t =
+ vlib_add_trace (vm, node, b0, sizeof (*t));
+ t->next_index = next0;
+ }
+
+ processed++;
+
+ /* $$$$$ Done processing 1 packet here $$$$$ */
+
+ /* verify speculative enqueue, maybe switch current next frame */
+ 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);
+ }
+
+ vlib_node_increment_counter (vm, ip4_hop_by_hop_node.index,
+ IP4_HOP_BY_HOP_ERROR_PROCESSED, processed);
+ return frame->n_vectors;
+}
+
+VLIB_REGISTER_NODE (ip4_hop_by_hop_node) = {
+ .function = ip4_hop_by_hop_node_fn,
+ .name = "ip4-hop-by-hop",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip4_hop_by_hop_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(ip4_hop_by_hop_error_strings),
+ .error_strings = ip4_hop_by_hop_error_strings,
+
+ /* See ip/lookup.h */
+ .n_next_nodes = IP_LOOKUP_N_NEXT,
+ .next_nodes = {
+ [IP_LOOKUP_NEXT_MISS] = "ip4-miss",
+ [IP_LOOKUP_NEXT_DROP] = "ip4-drop",
+ [IP_LOOKUP_NEXT_PUNT] = "ip4-punt",
+ [IP_LOOKUP_NEXT_LOCAL] = "ip4-local",
+ [IP_LOOKUP_NEXT_ARP] = "ip4-arp",
+ [IP_LOOKUP_NEXT_REWRITE] = "ip4-rewrite-transit",
+ [IP_LOOKUP_NEXT_CLASSIFY] = "ip4-classify",
+ [IP_LOOKUP_NEXT_MAP] = "ip4-map",
+ [IP_LOOKUP_NEXT_MAP_T] = "ip4-map-t",
+ [IP_LOOKUP_NEXT_SIXRD] = "ip4-sixrd",
+ [IP_LOOKUP_NEXT_HOP_BY_HOP] = "ip4-hop-by-hop", /* probably not */
+ [IP_LOOKUP_NEXT_ADD_HOP_BY_HOP] = "ip4-add-hop-by-hop",
+ [IP_LOOKUP_NEXT_POP_HOP_BY_HOP] = "ip4-pop-hop-by-hop",
+ },
+};
+
+VLIB_REGISTER_NODE (ip4_add_hop_by_hop_node) = {
+ .function = ip4_hop_by_hop_node_fn,
+ .name = "ip4-add-hop-by-hop",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip4_hop_by_hop_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(ip4_hop_by_hop_error_strings),
+ .error_strings = ip4_hop_by_hop_error_strings,
+
+ /* See ip/lookup.h */
+ .n_next_nodes = IP_LOOKUP_N_NEXT,
+ .next_nodes = {
+ [IP_LOOKUP_NEXT_MISS] = "ip4-miss",
+ [IP_LOOKUP_NEXT_DROP] = "ip4-drop",
+ [IP_LOOKUP_NEXT_PUNT] = "ip4-punt",
+ [IP_LOOKUP_NEXT_LOCAL] = "ip4-local",
+ [IP_LOOKUP_NEXT_ARP] = "ip4-arp",
+ [IP_LOOKUP_NEXT_REWRITE] = "ip4-rewrite-transit",
+ [IP_LOOKUP_NEXT_CLASSIFY] = "ip4-classify",
+ [IP_LOOKUP_NEXT_MAP] = "ip4-map",
+ [IP_LOOKUP_NEXT_MAP_T] = "ip4-map-t",
+ [IP_LOOKUP_NEXT_SIXRD] = "ip4-sixrd",
+ [IP_LOOKUP_NEXT_HOP_BY_HOP] = "ip4-hop-by-hop", /* probably not */
+ [IP_LOOKUP_NEXT_ADD_HOP_BY_HOP] = "ip4-add-hop-by-hop",
+ [IP_LOOKUP_NEXT_POP_HOP_BY_HOP] = "ip4-pop-hop-by-hop",
+ },
+};
+
+VLIB_REGISTER_NODE (ip4_pop_hop_by_hop_node) = {
+ .function = ip4_hop_by_hop_node_fn,
+ .name = "ip4-pop-hop-by-hop",
+ .vector_size = sizeof (u32),
+ .format_trace = format_ip4_hop_by_hop_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+
+ .n_errors = ARRAY_LEN(ip4_hop_by_hop_error_strings),
+ .error_strings = ip4_hop_by_hop_error_strings,
+
+ /* See ip/lookup.h */
+ .n_next_nodes = IP_LOOKUP_N_NEXT,
+ .next_nodes = {
+ [IP_LOOKUP_NEXT_MISS] = "ip4-miss",
+ [IP_LOOKUP_NEXT_DROP] = "ip4-drop",
+ [IP_LOOKUP_NEXT_PUNT] = "ip4-punt",
+ [IP_LOOKUP_NEXT_LOCAL] = "ip4-local",
+ [IP_LOOKUP_NEXT_ARP] = "ip4-arp",
+ [IP_LOOKUP_NEXT_REWRITE] = "ip4-rewrite-transit",
+ [IP_LOOKUP_NEXT_CLASSIFY] = "ip4-classify",
+ [IP_LOOKUP_NEXT_MAP] = "ip4-map",
+ [IP_LOOKUP_NEXT_MAP_T] = "ip4-map-t",
+ [IP_LOOKUP_NEXT_SIXRD] = "ip4-sixrd",
+ [IP_LOOKUP_NEXT_SIXRD] = "ip4-sixrd",
+ [IP_LOOKUP_NEXT_HOP_BY_HOP] = "ip4-hop-by-hop", /* probably not */
+ [IP_LOOKUP_NEXT_ADD_HOP_BY_HOP] = "ip4-add-hop-by-hop",
+ [IP_LOOKUP_NEXT_POP_HOP_BY_HOP] = "ip4-pop-hop-by-hop",
+ },
+};
+
+static clib_error_t *
+ip4_hop_by_hop_init (vlib_main_t * vm)
+{
+ ip4_hop_by_hop_main_t * hm = &ip4_hop_by_hop_main;
+
+ hm->vlib_main = vm;
+ hm->vnet_main = vnet_get_main();
+
+ return 0;
+}
+
+VLIB_INIT_FUNCTION (ip4_hop_by_hop_init);
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