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.
16 * ip/ip6_input.c: IP v6 input node
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/ip/ip6_input.h>
41 #include <vnet/ethernet/ethernet.h>
42 #include <vnet/ppp/ppp.h>
43 #include <vnet/hdlc/hdlc.h>
44 #include <vnet/pg/pg.h>
52 format_ip6_input_trace (u8 * s, va_list * va)
54 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
55 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
56 ip6_input_trace_t *t = va_arg (*va, ip6_input_trace_t *);
59 format_ip6_header, t->packet_data, sizeof (t->packet_data));
64 /* Validate IP v6 packets and pass them either to forwarding code
65 or drop exception packets. */
66 VLIB_NODE_FN (ip6_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
69 vnet_main_t *vnm = vnet_get_main ();
70 ip6_main_t *im = &ip6_main;
71 ip_lookup_main_t *lm = &im->lookup_main;
72 u32 n_left_from, *from, *to_next;
73 ip6_input_next_t next_index;
74 vlib_node_runtime_t *error_node =
75 vlib_node_get_runtime (vm, ip6_input_node.index);
76 vlib_simple_counter_main_t *cm;
77 u32 thread_index = vm->thread_index;
79 from = vlib_frame_vector_args (frame);
80 n_left_from = frame->n_vectors;
81 next_index = node->cached_next_index;
83 if (node->flags & VLIB_NODE_FLAG_TRACE)
84 vlib_trace_frame_buffers_only (vm, node, from, frame->n_vectors,
86 sizeof (ip6_input_trace_t));
88 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
89 VNET_INTERFACE_COUNTER_IP6);
91 while (n_left_from > 0)
95 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
97 while (n_left_from >= 4 && n_left_to_next >= 2)
99 vlib_buffer_t *p0, *p1;
100 ip6_header_t *ip0, *ip1;
101 u32 pi0, sw_if_index0, next0 = 0;
102 u32 pi1, sw_if_index1, next1 = 0;
105 /* Prefetch next iteration. */
107 vlib_buffer_t *p2, *p3;
109 p2 = vlib_get_buffer (vm, from[2]);
110 p3 = vlib_get_buffer (vm, from[3]);
112 vlib_prefetch_buffer_header (p2, LOAD);
113 vlib_prefetch_buffer_header (p3, LOAD);
115 CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD);
116 CLIB_PREFETCH (p3->data, sizeof (ip1[0]), LOAD);
129 p0 = vlib_get_buffer (vm, pi0);
130 p1 = vlib_get_buffer (vm, pi1);
132 ip0 = vlib_buffer_get_current (p0);
133 ip1 = vlib_buffer_get_current (p1);
135 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
136 sw_if_index1 = vnet_buffer (p1)->sw_if_index[VLIB_RX];
138 if (PREDICT_FALSE (ip6_address_is_multicast (&ip0->dst_address)))
140 arc0 = lm->mcast_feature_arc_index;
141 next0 = IP6_INPUT_NEXT_LOOKUP_MULTICAST;
145 arc0 = lm->ucast_feature_arc_index;
146 next0 = IP6_INPUT_NEXT_LOOKUP;
149 if (PREDICT_FALSE (ip6_address_is_multicast (&ip1->dst_address)))
151 arc1 = lm->mcast_feature_arc_index;
152 next1 = IP6_INPUT_NEXT_LOOKUP_MULTICAST;
156 arc1 = lm->ucast_feature_arc_index;
157 next1 = IP6_INPUT_NEXT_LOOKUP;
160 vnet_buffer (p0)->ip.adj_index[VLIB_RX] = ~0;
161 vnet_buffer (p1)->ip.adj_index[VLIB_RX] = ~0;
163 vnet_feature_arc_start (arc0, sw_if_index0, &next0, p0);
164 vnet_feature_arc_start (arc1, sw_if_index1, &next1, p1);
166 vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1);
167 vlib_increment_simple_counter (cm, thread_index, sw_if_index1, 1);
168 ip6_input_check_x2 (vm, error_node,
169 p0, p1, ip0, ip1, &next0, &next1);
171 vlib_validate_buffer_enqueue_x2 (vm, node, next_index,
172 to_next, n_left_to_next,
173 pi0, pi1, next0, next1);
176 while (n_left_from > 0 && n_left_to_next > 0)
180 u32 pi0, sw_if_index0, next0 = 0;
190 p0 = vlib_get_buffer (vm, pi0);
191 ip0 = vlib_buffer_get_current (p0);
193 sw_if_index0 = vnet_buffer (p0)->sw_if_index[VLIB_RX];
194 if (PREDICT_FALSE (ip6_address_is_multicast (&ip0->dst_address)))
196 arc0 = lm->mcast_feature_arc_index;
197 next0 = IP6_INPUT_NEXT_LOOKUP_MULTICAST;
201 arc0 = lm->ucast_feature_arc_index;
202 next0 = IP6_INPUT_NEXT_LOOKUP;
205 vnet_buffer (p0)->ip.adj_index[VLIB_RX] = ~0;
206 vnet_feature_arc_start (arc0, sw_if_index0, &next0, p0);
208 vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1);
209 ip6_input_check_x1 (vm, error_node, p0, ip0, &next0);
211 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
212 to_next, n_left_to_next,
216 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
219 return frame->n_vectors;
223 VLIB_REGISTER_NODE (ip6_input_node) = {
225 .vector_size = sizeof (u32),
227 .n_errors = IP6_N_ERROR,
228 .error_counters = ip6_error_counters,
230 .n_next_nodes = IP6_INPUT_N_NEXT,
232 [IP6_INPUT_NEXT_DROP] = "error-drop",
233 [IP6_INPUT_NEXT_LOOKUP] = "ip6-lookup",
234 [IP6_INPUT_NEXT_ICMP_ERROR] = "ip6-icmp-error",
235 [IP6_INPUT_NEXT_LOOKUP_MULTICAST] = "ip6-mfib-forward-lookup",
238 .format_buffer = format_ip6_header,
239 .format_trace = format_ip6_input_trace,
243 static clib_error_t *
244 ip6_init (vlib_main_t * vm)
246 ethernet_register_input_type (vm, ETHERNET_TYPE_IP6, ip6_input_node.index);
247 ppp_register_input_protocol (vm, PPP_PROTOCOL_ip6, ip6_input_node.index);
248 hdlc_register_input_protocol (vm, HDLC_PROTOCOL_ip6, ip6_input_node.index);
252 pn = pg_get_node (ip6_input_node.index);
253 pn->unformat_edit = unformat_pg_ip6_header;
256 /* Set flow hash to something non-zero. */
257 ip6_main.flow_hash_seed = 0xdeadbeef;
259 /* Default hop limit for packets we generate. */
260 ip6_main.host_config.ttl = 64;
263 uword *u = hash_get (ip_main.protocol_info_by_name, "IPV6_FRAGMENTATION");
266 ip_protocol_info_t *info =
267 vec_elt_at_index (ip_main.protocol_infos, *u);
268 ASSERT (NULL == info->format_header);
269 info->format_header = format_ip6_frag_hdr;
271 return /* no error */ 0;
274 VLIB_INIT_FUNCTION (ip6_init);
277 * fd.io coding-style-patch-verification: ON
280 * eval: (c-set-style "gnu")