2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #include <vlib/vlib.h>
16 #include <vnet/vnet.h>
17 #include <vnet/pg/pg.h>
18 #include <vppinfra/error.h>
19 #include <srv6-localsid/srv6_localsid_sample.h>
23 } srv6_localsid_sample_trace_t;
25 /* packet trace format function */
26 static u8 * format_srv6_localsid_sample_trace (u8 * s, va_list * args)
28 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
29 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
30 srv6_localsid_sample_trace_t * t = va_arg (*args, srv6_localsid_sample_trace_t *);
31 s = format (s, "SRv6-sample-localsid: localsid_index %d\n",
36 vlib_node_registration_t srv6_localsid_sample_node;
38 #define foreach_srv6_localsid_counter \
39 _(PROCESSED, "srv6-sample-localsid processed packets") \
40 _(NO_SRH, "(Error) No SRH.")
43 #define _(sym,str) SRV6_LOCALSID_COUNTER_##sym,
44 foreach_srv6_localsid_counter
46 SRV6_LOCALSID_N_COUNTERS,
47 } srv6_localsid_sample_counters;
49 static char * srv6_localsid_counter_strings[] = {
50 #define _(sym,string) string,
51 foreach_srv6_localsid_counter
56 SRV6_SAMPLE_LOCALSID_NEXT_ERROR,
57 SRV6_SAMPLE_LOCALSID_NEXT_IP6LOOKUP,
58 SRV6_SAMPLE_LOCALSID_N_NEXT,
59 } srv6_localsid_sample_next_t;
62 * @brief Function doing End processing.
64 //Fixme: support OAM (hop-by-hop header) here!
65 static_always_inline void
66 end_srh_processing (vlib_node_runtime_t * node,
69 ip6_sr_header_t * sr0,
72 ip6_address_t *new_dst0;
74 if(PREDICT_TRUE(ip0->protocol == IP_PROTOCOL_IPV6_ROUTE))
76 if(PREDICT_TRUE(sr0->type == ROUTING_HEADER_TYPE_SR))
78 if(PREDICT_TRUE(sr0->segments_left != 0))
80 sr0->segments_left -= 1;
81 new_dst0 = (ip6_address_t *)(sr0->segments);
82 new_dst0 += sr0->segments_left;
83 ip0->dst_address.as_u64[0] = new_dst0->as_u64[0];
84 ip0->dst_address.as_u64[1] = new_dst0->as_u64[1];
88 *next0 = SRV6_SAMPLE_LOCALSID_NEXT_ERROR;
89 b0->error = node->errors[SRV6_LOCALSID_COUNTER_NO_SRH];
94 /* Error. Routing header of type != SR */
95 *next0 = SRV6_SAMPLE_LOCALSID_NEXT_ERROR;
96 b0->error = node->errors[SRV6_LOCALSID_COUNTER_NO_SRH];
102 * @brief SRv6 Sample Localsid graph node
103 * WARNING: YOU MUST DO THE DUAL LOOP
106 srv6_localsid_sample_fn (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
108 u32 n_left_from, * from, * to_next;
110 u32 pkts_swapped = 0;
112 ip6_sr_main_t * sm = &sr_main;
114 from = vlib_frame_vector_args (frame);
115 n_left_from = frame->n_vectors;
116 next_index = node->cached_next_index;
117 u32 cpu_index = os_get_cpu_number ();
119 while (n_left_from > 0)
123 vlib_get_next_frame (vm, node, next_index,
124 to_next, n_left_to_next);
126 while (n_left_from > 0 && n_left_to_next > 0)
130 ip6_header_t * ip0 = 0;
131 ip6_sr_header_t * sr0;
132 u32 next0 = SRV6_SAMPLE_LOCALSID_NEXT_IP6LOOKUP;
133 ip6_sr_localsid_t *ls0;
134 srv6_localsid_sample_per_sid_memory_t *ls0_mem;
143 b0 = vlib_get_buffer (vm, bi0);
144 ip0 = vlib_buffer_get_current (b0);
145 sr0 = (ip6_sr_header_t *)(ip0+1);
147 /* Lookup the SR End behavior based on IP DA (adj) */
148 ls0 = pool_elt_at_index (sm->localsids, vnet_buffer(b0)->ip.adj_index[VLIB_TX]);
149 ls0_mem = ls0->plugin_mem;
152 end_srh_processing (node, b0, ip0, sr0, &next0);
154 /* ==================================================================== */
155 /* INSERT CODE HERE */
156 /* Example starts here */
157 //In this example we are changing the next VRF table by the one in CLI
158 vnet_buffer(b0)->sw_if_index[VLIB_TX] = ls0_mem->fib_table;
159 /* Example finishes here */
160 /* ==================================================================== */
162 if (PREDICT_FALSE(b0->flags & VLIB_BUFFER_IS_TRACED))
164 srv6_localsid_sample_trace_t *tr = vlib_add_trace (vm, node, b0, sizeof (*tr));
165 tr->localsid_index = ls0 - sm->localsids;
168 /* This increments the SRv6 per LocalSID counters.*/
169 vlib_increment_combined_counter
170 (((next0 == SRV6_SAMPLE_LOCALSID_NEXT_ERROR) ? &(sm->sr_ls_invalid_counters) : &(sm->sr_ls_valid_counters)),
173 1, vlib_buffer_length_in_chain (vm, b0));
175 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
176 n_left_to_next, bi0, next0);
180 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
184 return frame->n_vectors;
187 VLIB_REGISTER_NODE (srv6_localsid_sample_node) = {
188 .function = srv6_localsid_sample_fn,
189 .name = "srv6-localsid-sample",
190 .vector_size = sizeof (u32),
191 .format_trace = format_srv6_localsid_sample_trace,
192 .type = VLIB_NODE_TYPE_INTERNAL,
193 .n_errors = SRV6_LOCALSID_N_COUNTERS,
194 .error_strings = srv6_localsid_counter_strings,
195 .n_next_nodes = SRV6_SAMPLE_LOCALSID_N_NEXT,
197 [SRV6_SAMPLE_LOCALSID_NEXT_IP6LOOKUP] = "ip6-lookup",
198 [SRV6_SAMPLE_LOCALSID_NEXT_ERROR] = "error-drop",